JP6390419B2 - Vehicle seat slide device - Google Patents

Description

  The present invention relates to a vehicle seat slide device.

  2. Description of the Related Art Generally, a vehicle seat slide device includes an upper rail that supports a seat upward, and a lower rail that supports the upper rail so as to be relatively movable along the extending direction. In many cases, such a seat slide device is provided with a lock mechanism capable of restricting the relative movement of the upper rail with respect to the lower rail.

  For example, the seat slide device described in Patent Document 1 includes a lock lever that can be rotated around a rotation axis that intersects the extending direction of the upper rail. Further, the lower rail is provided with engaging portions that can engage with the lock lever at a plurality of positions in the extending direction. The lock mechanism is configured to regulate the relative movement of the upper rail by rotating the lock lever to engage with the engaging portion on the lower rail side.

  As described above, conventionally, many of the lock mechanisms of the seat slide apparatus allow the relative movement of the upper rail by engaging and disengaging the lock member supported by the upper rail with respect to the engaging portion on the lower rail side, and The moving position (sliding position) is fixed. By utilizing this, the slide position of the sheet can be adjusted.

  Further, for example, the seat slide device described in Patent Document 2 includes a plurality of lock plates having a pair of left and right lock insertion portions at a front end portion and a rear end portion. Furthermore, each of these lock plates is configured such that the lock insertion portion is pressed against the engaging portion on the lower rail side independently based on the urging force of the urging member. Then, by arranging these lock plates in series along the extending direction of the lower rail so that any one of the lock insertion portions engages with the engaging portion on the lower rail regardless of the movement position of the upper rail. Further, it is possible to perform finer slide position adjustment while ensuring the necessary strength.

JP 2010-100077 A Special table 2012-508132 gazette

  However, in the above-described conventional configuration, it is necessary to secure an arrangement space for the urging member of each lock plate and the unlock mechanism that moves the lock plates up and down integrally. As a result, there is a problem that the lock mechanism is enlarged, and there is still room for improvement in this respect.

  The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a vehicle seat slide device with a high degree of freedom of adjustment while ensuring high reliability with a simpler configuration. There is to do.

  A vehicle seat slide device that solves the above problems includes an upper rail that supports a seat upward, a lower rail that supports the upper rail so as to be relatively movable, and a plurality of engaging claws that are arranged at equal intervals along the extending direction. The first and second engaging portions provided on the lower rail, the fixing portion with respect to the upper rail, and an elastic restoring force are pressed against the engaging portion on the lower rail side to be inserted between the engaging claws. A plurality of lock pieces disposed between the first and second engaging portions and the insertion portion against the elastic restoring force. An unlock mechanism that elastically deforms each of the lock pieces in a direction away from the joint portion, and at least one of the insertion portions extends from the lower rail with respect to the engagement claw on the lower rail side. In the state of being engaged from one direction side along the direction, at least one of the insertion portions is engaged from the other direction side along the extending direction of the lower rail, and depends on the moving position of the upper rail with respect to the lower rail. However, it is preferable that at least any one of the insertion portions is configured to be inserted between the engagement claws.

  According to the above configuration, the movement position of the upper rail is set at an interval narrower than the interval at which each engagement claw is formed, with the minimum movement distance that reverses the direction in which each insertion portion engages with each engagement claw as an adjustment pitch. Can be adjusted (fine slide function). At any movement position, it is possible to ensure a state in which at least one of the lock pieces meshes with each engagement portion on the lower rail side (always meshing function).

  Further, the biasing member can be omitted by adopting a structure in which the insertion portion of each lock piece is pressed against the engagement portion on the lower rail side based on the elastic restoring force of each lock piece. Furthermore, since each lock piece is not necessarily configured to be engaged with both the first and second engaging portions on the lower rail side, each of these lock pieces is also used during the locking and unlocking operations. There is no need to move up and down as a unit. As a result, the unlock mechanism can be simplified. As a result, with a simple configuration, the degree of freedom in adjustment can be increased while ensuring high reliability.

  In the vehicle seat slide device that solves the above-described problem, at least one of the insertion portions is engaged with the engagement claw on the first engagement portion side from one direction side along the extending direction of the lower rail. In such a state, at least any one of the insertion portions is configured to engage with the engagement claws on the second engagement portion side from the other direction side along the extending direction of the lower rail. It is preferable.

  According to the said structure, each insertion part of each lock piece supported by the said upper rail and each engaging part by the side of a lower rail engage on the width direction both sides of an upper rail. And thereby, high lock rigidity is securable.

In the vehicle seat slide device that solves the above-described problem, it is preferable that the plurality of lock pieces are integrally formed by sharing the fixing portion.
According to the above configuration, it is possible to further simplify the configuration. And the assembly work with respect to an upper rail can be made easy and efficient.

  In the vehicle seat slide device that solves the above-described problem, each of the lock pieces includes a lever portion that extends in the extending direction of the upper rail from the fixed portion, and the insertion portion that extends in a direction intersecting the lever portion. It is preferable to provide.

  According to the above configuration, the plurality of lock pieces can be supported by the upper rail without interfering with each other. For example, by adopting a configuration in which the lever portion is bent, it is possible to easily secure an elastic restoring force for pressing the insertion portion against the engaging portion on the lower rail side.

  A vehicle seat slide device that solves the above problems includes a first lock piece having a first insertion portion that is inserted between the engagement claws on the first engagement portion side, and the second lock piece. A second lock piece having the second insertion portion inserted between the respective engagement claws on the engagement portion side, and a third lock piece having the first and second insertion portions. And the second lock portion is engaged with the second engagement portion in a state where the first lock piece is engaged with the first engagement portion from one side along the extending direction of the lower rail. And the third lock piece engages from the other direction side along the extending direction of the lower rail, and the second lock piece extends in the extending direction of the lower rail with respect to the second engaging portion. The first or third engaging portion with respect to the first engaging portion in a state of being engaged from one direction side along That either of the locking piece are configured to engage the other direction along the extending direction of the lower rail is preferred.

According to the said structure, high reliability and a freedom degree of adjustment are securable with a simple structure.
A vehicle seat slide device that solves the above-described problems includes a first lock piece having the insertion portion that is inserted between the engagement claws on the first engagement portion side, and the second engagement portion. A second lock piece having the insertion portion to be inserted between the respective engaging claws on the side, and the first and second lock pieces extend in a direction intersecting the extending direction of the upper rail In addition, it is preferable that a leaf spring portion having a bent shape is provided between the fixing portion and the insertion portion.

  According to the above configuration, the plurality of lock pieces supported by the upper rail can be efficiently (compactly) arranged between the first and second engaging portions on the lower rail side. Further, by providing a leaf spring portion having a bent shape between the insertion portion and the fixing portion, a large elastic restoring force can be generated without enlarging the installation space of each lock piece. And thereby, each lock piece can be operated more smoothly and reliably. As a result, higher reliability can be ensured.

  A vehicle seat slide device that solves the above problems includes a plurality of first lock pieces arranged at equal intervals and a plurality of first lock members formed integrally with the fixed portion and arranged at equal intervals. The second lock piece is formed integrally with the fixed portion, and the first and second lock members are fixed to the upper rail, It is preferable that the first and second lock pieces are alternately arranged along the extending direction of the upper rail.

  According to the said structure, the some lock piece supported by the upper rail can be arrange | positioned between the 1st and 2nd engaging parts by the side of a lower rail more efficiently (compactly). And the assembly operation | work with respect to the upper rail can be made easy and efficient.

A vehicle seat slide device that solves the above-described problems includes a first lock piece having the insertion portion that is inserted between the engagement claws on the first engagement portion side, and the second engagement portion. A second lock piece having the insertion portion inserted between the engaging claws on the side, and the following formulas:
P = W1 + W2 + C
P = n × C
(However, P: formation pitch of the engaging claw, W1: insertion width of the insertion portion, W2: claw width of the engagement claw, C: adjustment pitch, n: total number of the insertion portions)
And there is no phase difference between the first engagement portion and the second engagement portion, and the insertion portions of the first and second lock pieces along the extending direction of the lower rail Are alternately arranged at equal intervals,
P × (n−1) = Z × n
Or the following formula:
P × (n + 1) = Z × n
(However, Z: pitch between the insertion portion of the first lock piece and the insertion portion of the second lock piece)
It is preferable to be configured to satisfy either one of the above.

  According to the said structure, the seat slide apparatus provided with the fine slide and the constant meshing function can be comprised easily.

  According to the present invention, high reliability and freedom of adjustment can be ensured with a simpler configuration.

The side view which shows schematic structure of the vehicle seat and a seat slide apparatus. The perspective view of a seat slide apparatus. (A) is a top view of a seat slide device, (b) is a side view of a seat slide device. FIG. 3 is an exploded perspective view of the seat slide device according to the first embodiment. (A) (b) is sectional drawing of the seat slide apparatus in 1st Embodiment (VV cross section in FIG. 3, a: locked state, b: unlocked state). (A) (b) is sectional drawing of the seat slide apparatus in 1st Embodiment (VI-VI cross section in FIG. 3, a: locked state, b: unlocked state). (A) is a top view of a lock mechanism, (b) is a top view of a lock piece. (A) is sectional drawing (locked state, VIIIa-VIIIa cross section in Fig.5 (a)) of the seat slide apparatus in 1st Embodiment, (b) is sectional drawing of the seat slide apparatus in 1st Embodiment. (Unlocked state, VIIIb-VIIIb cross section in FIG. 5B). (A) is sectional drawing (locked state, IXa-IXa cross section in Fig.5 (a)) of the seat slide apparatus in 1st Embodiment, (b) is sectional drawing of the seat slide apparatus in 1st Embodiment. (Unlocked state, IXb-IXb cross section in FIG. 5B). Sectional drawing of the seat slide apparatus in 1st Embodiment (XX cross section in FIG. 3). (A) is action explanatory drawing (XIa-XIa cross section in Fig.6 (a)) of the seat slide apparatus in 1st Embodiment, (b) is action explanatory drawing of the seat slide apparatus in 1st Embodiment ( XIb-XIb cross section in FIG. (A) and (b) are the operation explanatory views of the seat slide device in a 1st embodiment. (A) and (b) are the operation explanatory views of the seat slide device in a 1st embodiment. (A) and (b) are the operation explanatory views of the seat slide device in a 1st embodiment. FIG. 15A is a plan view of a seat slide device (lock mechanism portion) in the second embodiment, and FIG. 15B is a sectional view of the seat slide device (lock mechanism portion) in the second embodiment (FIG. 15A). XVb-XVb cross section). Sectional drawing of the seat slide apparatus in 2nd Embodiment (XVI-XVI cross section in FIG. 15). Sectional drawing of the seat slide apparatus in 2nd Embodiment (XVII-XVII cross section in FIG. 15). Sectional drawing of the seat slide apparatus in 2nd Embodiment (XVIII-XVIII cross section in FIG. 15). The perspective view of the 1st and 2nd locking member. The perspective view (assembly state) of the 1st and 2nd lock member. The front view (assembly state) of the 1st and 2nd lock member. The top view (assembly state) of the 1st and 2nd lock member. (A) is sectional drawing (XXIIIa-XXIIIa cross section in FIG. 16) of the seat slide apparatus in 2nd Embodiment, (b) is sectional drawing (XXIIIb- in FIG. 16) of the sheet slide apparatus in 2nd Embodiment. XXIIIb cross section). (A) and (b) are the operation explanatory views of the seat slide device in a 2nd embodiment. (A) and (b) are the operation explanatory views of the seat slide device in a 2nd embodiment. (A) and (b) are the operation explanatory views of the seat slide device in a 2nd embodiment. (A) and (b) are the operation explanatory views of the seat slide device in a 2nd embodiment. (A) and (b) are the operation explanatory views of the seat slide device in a 2nd embodiment. (A) and (b) are the operation explanatory views of the seat slide device in a 2nd embodiment. (A)-(d) is a figure explaining the collision safety structure of the seat slide apparatus in 2nd Embodiment. (A)-(d) is a figure explaining the collision safety structure of the seat slide apparatus in 2nd Embodiment. The figure which shows the structure of the seat slide apparatus in 3rd Embodiment. The figure which shows the structure of the seat slide apparatus in 4th Embodiment. The figure which shows the structure of the seat slide apparatus in 5th Embodiment. The figure which shows the structure of the seat slide apparatus in 5th Embodiment. The figure which shows the structure of the seat slide apparatus in 6th Embodiment. The figure which shows the structure of the seat slide apparatus of another example. The figure which shows the structure of the seat slide apparatus of another example. (A) is a top view of the lock member of another example, (b) is a front view of the lock member of another example, (c) is a perspective view of the lock member of another example. (A) is a top view of the lock member of another example, (b) is a front view of the lock member of another example, (c) is a side view of the lock member of another example. (A) is a top view of the lock member of another example, (b) is a front view of the lock member of another example, (c) is a side view of the lock member of another example.

[First Embodiment]
Hereinafter, a first embodiment relating to a vehicle seat slide device will be described with reference to the drawings.
As shown in FIG. 1, a vehicle seat 1 is provided on a seat cushion 2, a seat back 3 provided to be tiltable with respect to a rear end portion of the seat cushion 2, and an upper end of the seat back 3. The headrest 4 is provided.

  As shown in FIGS. 1 and 2, the floor F of the vehicle is provided with a pair of lower rails 5 extending in the front-rear direction (left-right direction in FIG. 1). Further, each of the lower rails 5 is provided with an upper rail 6 that relatively moves on the respective lower rails 5 along the extending direction thereof. The seat 1 is supported above the upper rails 6.

  That is, in the present embodiment, the seat slide device 10 is formed by the lower rail 5 and the upper rail 6. By using the function of the seat slide device 10, the position of the seat 1 in the vehicle front-rear direction can be adjusted.

  More specifically, as shown in FIGS. 3A, 3B, 4, 5, 5A and 6B and FIGS. 6A, 6B, the lower rail 5 has a floor F of the vehicle (FIG. 1). A flat bottom wall portion 11 serving as a fixed portion. Further, outer wall portions 12 are erected on both ends of the bottom wall portion 11 in the width direction (left and right directions in FIGS. 5 and 6). Further, a flange-shaped upper wall portion 13 is formed at the upper end of each outer wall portion 12 (the upper end portion in FIGS. 5 and 6) extending inward in the width direction. An inner wall portion 14 is formed at the tip of each upper wall portion 13 so as to be folded back downward.

  On the other hand, the upper rail 6 includes a pair of side wall portions 15 that face each other in the width direction. Further, the upper rail 6 includes a plate-like upper wall portion 16 that connects the both side wall portions 15. The upper rail 6 of the present embodiment is configured such that the upper rail body 18 having a substantially U-shaped cross section formed by the both side wall portions 15 and the upper wall portion 16 is disposed between the inner wall portions 14 on the lower rail 5 side. It is mounted on the lower rail 5.

  Moreover, the upper rail 6 of this embodiment is provided with the folding | returning part 23 folded back toward the width direction outer side from the lower end of each side wall part 15. As shown in FIG. Then, the folded portion 23 is disposed in a space surrounded by the outer wall portion 12, the upper wall portion 13, and the inner wall portion 14 constituting the lower rail 5, so that the relative movement in the upward direction and the width direction with respect to the lower rail 5 is achieved. Are now regulated.

  As shown in FIGS. 5 and 6, in this embodiment, a ball-like shape (not shown) is formed between the outer wall portion 12 of the lower rail 5 and the folded portion 23 of the upper rail 6 that face each other in the width direction as described above. Rolling elements are interposed. Specifically, these rolling elements are held at both ends in the longitudinal direction of a holding member 24 formed in a long bar shape. In the present embodiment, these rolling elements roll in contact with the outer wall portion 12 of the lower rail 5 and the folded portion 23 of the upper rail 6 to ensure smooth relative movement of the upper rail 6 with respect to the lower rail 5. Yes.

  Also, as shown in FIGS. 4 to 6, 7 (a), 7 (b) and 8 (a) and 8 (b), the seat slide device 10 of the present embodiment is supported by the upper rail 6 and mounted on the lower rail 5. A plurality of lock pieces 30 (30a to 30c) that can be engaged with each other are provided. In the present embodiment, a lock mechanism 31 that can restrict the relative movement of the upper rail 6 with respect to the lower rail 5 is formed based on the engagement relationship between the lock pieces 30 and the lower rail 5.

  More specifically, a plurality of engaging claws 32 projecting downward are formed on the inner wall portions 14 (14a, 14b) of the lower rail 5, respectively. Specifically, these engaging claws 32 are provided at substantially equal intervals along the extending direction of the lower rail 5. In the present embodiment, the engaging claws 32 form engaging portions 33 (33a, 33b) on the lower rail 5 side that are arranged in two rows along the extending direction.

  On the other hand, the upper rail 6 includes a fixing portion 34 for the upper rail 6, a lever portion 35 extending in the extending direction of the upper rail 6, and a lock engaging portion 36 extending in a direction substantially orthogonal to the lever portion 35. The first to third lock pieces 30a to 30c are provided.

  In the present embodiment, each of these lock pieces 30 (30a to 30c) is integrally formed so as to share the fixed portion 34 by plastic working (pressing) a plate material. Further, the fixing portion 34 of each of the lock pieces 30 (30a to 30c) is fixed to the upper wall portion 16 of the upper rail 6. And each lock piece 30 (30a-30c) is supported by the said upper rail 6 in the state by which each lever part 35 was juxtaposed between the both-side wall part 15 (15a, 15b) which comprises the upper rail 6 by this. It is configured to be.

  Specifically, the first lock piece 30a is arranged in parallel with the first side wall 15a (the left side wall in FIG. 5) of the upper rail 6, and the second lock piece 30b is 2 parallel to the side wall portion 15b (right side wall portion in the figure). The third lock piece 30c is disposed between the first and second lock pieces 30a and 30b.

  As shown in FIGS. 5 and 7, when the fixing portion 34 for the upper rail 6 is the base end of each lock piece 30 (30a to 30c), the distal end portion of the first lock piece 30a (the lever portion 35) Is provided with a first lock engagement portion 36a extending toward the side of the first side wall portion 15a (the left side in FIG. 5). And the 2nd lock engagement part 36b extended toward the 2nd side wall part 15b side (right side in FIG. 5) in parallel is provided in the front-end | tip part of the 2nd lock piece 30b.

  Further, as shown in FIGS. 6 and 7, the third lock piece 30c has a longer lever portion 35 than the first and second lock pieces 30a and 30b. Then, at the tip of the third lock piece 30c (the lever part 35), the first lock engaging part 36a extending toward the first side wall part 15a and the second side extending toward the second side wall part 15b are provided. A lock engaging portion 36b is provided.

  As shown in FIG. 7B, in the present embodiment, the first lock engagement portion 36a and the second lock engagement portion 36b of the third lock piece 30c have a substantially rectangular outer shape extending in the width direction. And are integrally formed. As shown in FIGS. 4 and 5, the seat slide device 10 of this embodiment includes a partition member 37 that partitions the inside of the upper rail 6 in the width direction. Specifically, the partition wall member 37 of the present embodiment is formed by bending a plate material into a substantially U-shaped cross section so that two parallel partition walls 37a and 37b and both the partition walls 37a and 37b are formed. And an intermediate portion 37c to be connected. That is, the partition wall member 37 has the intermediate portion 37c fixed to the upper wall portion 16 of the upper rail 6 so that the two partition wall portions 37a and 37b divide the inner side of the upper rail 6 into three in the width direction. It is configured. And each lock piece 30 of this embodiment is arrange | positioned inside the upper rail 6 in the aspect which pinches | interposes these both partition part 37a, 37b between each lever part 35. As shown in FIG.

  As shown in FIGS. 4 to 6, the side wall portions 15 (15a, 15b) of the upper rail 6 are respectively provided with the lock engaging portions 36 provided at the tip portions of the lock pieces 30 as described above. Insertion holes 38 and 39 to be inserted are formed. Further, each of the lock pieces 30 is bent so as to push down the tip end portion provided with the lock engaging portion 36 downward (downward in FIGS. 5 and 6). 6 between both side wall portions 15, that is, between the first engaging portion 33a and the second engaging portion 33b on the lower rail 5 side. Thus, in the seat slide device 10 according to the present embodiment, the lock engagement portions 36 of the lock pieces 30 are pressed against the engagement portions 33 on the lower rail 5 side based on the elastic restoring force. It is configured to be.

  That is, as shown in FIGS. 5 to 7, the first lock engaging portion 36 a provided in the first and third lock pieces 30 a and 30 c is the first inner wall portion 14 a (see FIGS. 5 and 6) of the lower rail 5. It is pressed against the first engaging portion 33a formed on the inner wall portion on the left side. And the 2nd lock engaging part 36b provided in the 2nd and 3rd lock pieces 30b and 30c is formed in the 2nd inner wall part 14b (the inner wall part of the right side in FIG.5 and FIG.6) of the lower rail 5. FIG. In addition, it is pressed against the second engaging portion 33b.

  More specifically, as shown in FIGS. 5 to 7, in the present embodiment, the lock engaging portions 36 of these lock pieces 30 are provided with a plurality of through holes 40, respectively. Each lock piece 30 is configured to engage with the engaging portion 33 on the lower rail 5 side in a manner in which each engaging claw 32 is inserted into each through hole 40.

  That is, as shown in FIGS. 7B and 9A, in the present embodiment, by forming the through holes 40 in the lock engaging portions 36 of the respective lock pieces 30, these lock engaging portions are formed. The rod-shaped portion remaining on 36 serves as the insertion portion 41 of each lock piece 30 inserted between the engagement claws 32 on the lower rail 5 side. In the seat slide device 10 according to the present embodiment, the insertion rails 41 are engaged with the engagement claws 32 from the extending direction of the lower rail 5, whereby the upper rail 6 that supports the lock piece 30 is relatively Movement is restricted (locked state).

  Also, as shown in FIGS. 4, 7A and 8, the seat slide device 10 of the present embodiment includes an unlock lever 43 supported in the upper rail 6 in a rotatable state. The unlock lever 43 of the present embodiment is formed in a long and substantially rod shape having two side plate portions 43a and 43b facing each other by bending a plate material. As shown in FIGS. 4, 7A, 8 and 10, the upper rail 6 of the present embodiment is provided with a support shaft 44 spanned between the side wall portions 15 thereof. The side plate portions 43a and 43b of the unlock lever 43 are provided with through holes 45 through which the support shafts 44 are inserted.

  That is, the unlock lever 43 of the present embodiment is supported by the support shaft 44 provided on the upper rail 6 so that it can be rotated around the support shaft 44 along the extending direction of the upper rail 6. It is arranged. Further, a flange extending on both sides in the width direction of the upper rail 6 in a manner intersecting the longitudinal direction of the unlock lever 43 at the tip of the unlock lever 43 (the right end in FIGS. 7A and 8). A portion 46 is formed. And the unlock lever 43 of this embodiment rotates clockwise in FIG. 8, and the flange part 46 provided in the front-end | tip is the locking mechanism of each said lock piece 30 (30a-30c). The joint portion 36 (36a, 36b) is configured to be pushed down.

  Thus, in the seat slide device 10 of the present embodiment, the lock engaging portion 36 of each lock piece 30 is elastically deformed in the direction away from the engaging portion 33 on the lower rail 5 side against the elastic restoring force. It is configured. Then, as shown in FIGS. 8B and 9B, each insertion portion 41 formed in the lock engagement portion 36 is removed from between the engagement claws 32 on the lower rail 5 side. The upper rail 6 is released from being restrained, that is, the relative movement of the upper rail 6 with respect to the lower rail 5 is allowed (unlocked state).

  More specifically, as shown in FIGS. 1 to 4, the seat slide device 10 of the present embodiment includes an operation handle 48 that is lifted to adjust the slide position of the seat 1. In the present embodiment, the operation handle 48 is formed by bending a pipe material. Further, the operation handle 48 has a long and substantially rod-shaped operation portion 48 a extending in a direction substantially orthogonal to the extending direction of the upper rail 6. Further, both ends of the operation portion 48 a are bent along the extending direction of each upper rail 6. Then, as shown in FIGS. 7A and 8, the operation handle 48 of the present embodiment uses the bent portion as a connection portion 48b, and the base end portion of the unlock lever 43 (the left end in each drawing). Part).

  Specifically, as shown in FIGS. 4, 7A and 8, the operation handle 48 of the present embodiment has the connection portions 48b provided at both ends of the operation portion 48a at the distal end side (see FIG. 7 and FIG. 8, it has a cylindrical shape that opens to the right side and the vehicle rear side. Further, the base end portion of the unlock lever 43 is in a state where the two side plate portions 43a and 43b provided in parallel with each other are overlapped with each other. The seat slide device 10 of the present embodiment is configured so that the base end portion of the unlock lever 43 is inserted into each connection portion 48b of the operation handle 48 formed in a cylindrical shape. The lock lever 43 is connected.

  Further, the seat slide device 10 of the present embodiment includes a spring member 49 that pushes down a connection portion between the operation handle 48 and the unlock lever 43. In the present embodiment, the spring member 49 is formed by bending a wire into two, thereby extending a pair of extending portions 49a and 49b extending in the longitudinal direction of the unlock lever 43 and the bases of these extending portions 49a and 49b. And a bent portion 49c formed on the end side. Further, the spring member 49 has its extending portions 49a and 49b engaged in the vicinity of the upper wall portion 16 of the upper rail 6 (see FIG. 10), and the bent portion 49c on the upper surface of the connection portion 48b of the operation handle 48. In an engaged state, it is assembled inside the upper rail 6. The seat slide device 10 according to the present embodiment holds the connecting portion between the operation handle 48 and the unlock lever 43 in a pressed down state based on the elastic force (elastic restoring force) of the spring member 49. It is configured to be.

  That is, as shown in FIG. 8A, the unlock lever 43 of the present embodiment has a flange portion 46 provided at the tip thereof based on the biasing force of the spring member 49 when the operation handle 48 is not operated. Is held above the lock engaging portion 36 of each lock piece 30. Further, as shown in FIG. 8B, the operation handle 48 of the present embodiment grasps the operation portion 48a and pulls it up, thereby bringing the unlock lever 43 connected to the connection portion 48b into the same position. It has a configuration that can be rotated clockwise. That is, the flange portion 46 provided at the tip of the unlock lever 43 pushes down the lock engagement portion 36 of each lock piece 30, so that each insertion portion 41 formed in each lock engagement portion 36 becomes lower rail 5. It is extracted from between the respective engaging claws 32 (see FIG. 9B). Thus, the seat slide device 10 according to the present embodiment is configured to release the engagement between the lock pieces 30 supported by the upper rail 6 and the engaging portion 33 on the lower rail 5 side.

(Fine-step slide function and constant meshing structure)
Next, the fine slide function and the constant mesh structure in the seat slide device 10 of the present embodiment will be described.

  As shown in FIG. 11, in this embodiment, the groove width W0 between the engaging claws 32 constituting the engaging portions 33 (33a, 33b) on the lower rail 5 side is the lock pieces 30 (30a to 30c). The insertion width 41 is set wider than the insertion width W1. Further, as shown in FIGS. 11 and 12, in the seat slide device 10 of the present embodiment, the first lock piece 30 a extends along the extending direction of the lower rail 5 with respect to the first engaging portion 33 a in the lower rail 5. One of the second and third lock pieces 30b, 30c is engaged with the second engagement portion 33b of the lower rail 5 from the other direction side while being engaged from the one direction side. Further, as shown in FIGS. 12 and 13, the second lock piece 30 b is engaged with the second engagement portion 33 b formed on the lower rail 5 from one direction side along the extending direction of the lower rail 5. In this state, one of the first and third lock pieces 30a, 30c is engaged with the first engagement portion 33a in the lower rail 5 from the other direction side. And the seat slide apparatus 10 of this embodiment is a structure which controls the relative movement of the upper rail 6 with respect to the lower rail 5 by this.

  That is, in the seat slide device 10 according to this embodiment, the lock pieces 30 (30a to 30c) inserted between the engagement claws 32 constituting the engagement portions 33 (33a, 33b) on the lower rail 5 side are inserted. The part 41 can change the insertion position between the engaging claws 32 along the extending direction of the lower rail 5. The seat slide device 10 according to the present embodiment can adjust the moving position of the upper rail 6 with the minimum moving distance that reverses the direction in which each insertion portion 41 is engaged with each engaging claw 32 as an adjustment pitch C. It is the composition.

  More specifically, when the upper rail 6 is located at the relative movement position shown in FIG. 11, the seat slide device 10 of the present embodiment has each insertion portion of the first lock engagement portion 36a provided in the first lock piece 30a. 41 is configured to engage with the first engaging portion 33a of the lower rail 5 in a state of contacting the engaging claws 32 from the vehicle front side (left side in FIG. 11A). At this time, the second engaging portion 33b of the lower rail 5 is in contact with each engaging claw 32 from the vehicle rear side (right side in FIG. 11B) in the opposite direction. Each insertion part 41 of the 2nd lock engagement part 36b provided in the 3rd lock piece 30c is the structure engaged.

  Further, in the seat slide device 10 of the present embodiment, when the upper rail 6 is in the relative movement position shown in FIG. 12, each insertion portion 41 of the first lock engagement portion 36a provided in the first lock piece 30a is Further, the first engaging portion 33a on the lower rail 5 side is engaged with the first engaging portion 33a on the lower rail 5 side in contact with the engaging claws 32 from the vehicle rear side (right side in FIG. 12A). At this time, the second engaging portion 33b on the lower rail 5 side is in contact with each engaging claw 32 from the vehicle front side (left side in FIG. 12B) in the opposite direction. The second lock engagement portion 36b provided on the second lock piece 30b is engaged.

  Further, in the seat slide device 10 of the present embodiment, when the upper rail 6 is in the relative movement position shown in FIG. 13, each insertion portion 41 of the second lock engaging portion 36b provided in the second lock piece 30b is provided. The second engagement portion 33b on the lower rail 5 side is engaged with the second engagement portion 33b on the lower rail 5 side in contact with the engagement claws 32 from the vehicle rear side (right side in FIG. 13B). At this time, the first engaging portion 33a on the lower rail 5 side is in contact with each engaging claw 32 from the vehicle front side (the left side in FIG. 13A) in the opposite direction, The first lock engaging portion 36a provided on the third lock piece 30c is configured to be engaged.

  As shown in FIG. 11, in the seat slide device 10 of the present embodiment, when the first lock piece 30a is engaged with the first engaging portion 33a on the lower rail 5 side from the vehicle front side. The third lock piece 30c (the first lock engagement portion 36a) is configured to engage with the first engagement portion 33a on the lower rail 5 side from the vehicle rear side. As shown in FIG. 13, when the second lock piece 30b is engaged with the second engagement portion 33b on the lower rail 5 side from the vehicle rear side, the third lock piece 30c 2 lock engaging portion 36b) is configured to engage with the second engaging portion 33b on the lower rail 5 side from the vehicle front side. Then, as shown in FIG. 12, the first lock piece 30a is engaged with the first engagement portion 33a on the lower rail 5 side from the vehicle rear side, and the second lock piece 30b is on the lower rail 5 side from the vehicle front side. The third lock piece 30c is configured not to engage with the respective engaging portions 33 (33a, 33b) of the lower rail 5 when engaged with the second engaging portion 33b.

  Further, in the seat slide device 10 according to the present embodiment, each lock piece 30 (30a to 30c) is independently locked and unlocked, so that at least any one of the lock pieces 30 does not depend on the movement position of the upper rail 6. The insertion portion 41 is configured to be inserted between the engagement claws 32 constituting the respective engagement portions 33 (33a, 33b) on the lower rail 5 side.

  For example, as shown in FIGS. 14A and 14B, the insertion portions 41 and the engaging claws 32 interfere with each other so that the first and second lock pieces 30a and 30b are both on the lower rail 5 side. Even when the first and second engaging portions 33a and 33b cannot be engaged, the insertion portions 41 of the third lock piece 30c are inserted between the engaging claws 32. . And the seat slide apparatus 10 of this embodiment can ensure high reliability by implement | achieving the always meshing structure of each lock piece 30 with respect to each engaging part 33 of the lower rail 5 by this. ing.

  Furthermore, in the seat slide device 10 of the present embodiment, when only one of the lock pieces 30 is in an engaged state, the respective insertion portions 41 in the engaged state are engaged with each other along the extending direction of the lower rail 5. It can move between the claws 32. That is, by correcting the movement position of the upper rail 6, each insertion portion 41 on the first lock engagement portion 36a side constituting the first insertion portion and the second lock engagement constituting the second insertion portion. Both the insertion portions 41 on the side of the portion 36b are in a state of being engaged with the engagement portions 33 (33a, 33b) on the lower rail 5 side. This makes it possible to shift to a completely locked state.

As described above, according to the present embodiment, the following effects can be obtained.
(1) The seat slide apparatus 10 includes first and second engaging portions 33a and 33b provided on the lower rail 5 having a plurality of engaging claws 32 arranged at equal intervals along the extending direction. The seat slide device 10 includes a fixing portion 34 for the upper rail 6 and an insertion portion 41 inserted between the engaging claws 32 by being pressed against the engaging portion 33 on the lower rail 5 side based on the elastic restoring force. And a plurality of lock pieces 30 arranged in parallel between the first and second engaging portions 33a and 33b. Further, in the seat slide device 10, at least one of the insertion portions 41 is engaged with the engagement claw 32 on the first engagement portion 33 a side from one direction side along the extending direction of the lower rail 5. The at least one insertion portion 41 is configured to engage with the engagement claw 32 on the second engagement portion 33 b side from the other direction side along the extending direction of the lower rail 5. The seat slide device 10 is configured such that at least one of the insertion portions 41 is inserted between the engagement claws 32 on the lower rail 5 side, regardless of the position of movement of the upper rail 6 with respect to the lower rail 5.

  According to the above configuration, the minimum moving distance that reverses the direction in which each insertion portion 41 engages with each engagement claw 32 is set as the adjustment pitch C, and the interval (formation pitch P) at which each engagement claw 32 is formed. The moving position of the upper rail 6 can be adjusted with a narrow interval (C = P / 3). Further, on both sides in the width direction of the upper rail 6, each insertion portion 41 of each lock piece 30 supported by the upper rail 6 and each engagement portion 33 (33 a, 33 b) on the lower rail 5 side engage with each other to achieve high lock. Rigidity can be ensured. And in any moving position, the state which at least any one of each lock piece 30 meshes with each engaging part 33 by the side of the lower rail 5 can be ensured.

  Further, the biasing member can be omitted by adopting a structure in which the insertion portion 41 of each lock piece 30 is pressed against the engagement portion 33 on the lower rail 5 side based on the elastic restoring force of each lock piece 30. Furthermore, since each lock piece 30 is not necessarily configured to be engaged with both the first and second engaging portions 33a and 33b on the lower rail 5 side, these lock pieces 30 are also used during the locking and unlocking operations. There is no need to move the lock pieces 30 up and down integrally. As a result, the unlock mechanism can be simplified. As a result, with a simple configuration, the degree of freedom in adjustment can be increased while ensuring high reliability.

  (2) Each lock piece 30 includes a lever portion 35 extending from the fixing portion 34 in the extending direction of the upper rail 6, and a lock engaging portion 36 having an insertion portion 41 and extending in a direction intersecting the lever portion 35. .

  According to the said structure, the some lock piece 30 can be arrange | positioned in the upper rail 6 without interfering with each other. For example, by adopting a configuration in which the lever portion 35 is bent, the elastic restoring force for easily pressing the insertion portion 41 provided in the lock engagement portion 36 against the engagement portion 33 on the lower rail 5 side. Can be secured.

  (3) The seat slide device 10 includes a first lock piece 30a having a first lock engagement portion 36a that engages with the first engagement portion 33a in the lower rail 5, and a second engagement portion in the lower rail 5. And a second lock piece 30b having a second lock engagement portion 36b that engages with 33b. The seat slide device 10 also includes a third lock piece 30c having a first lock engagement portion 36a and a second lock engagement portion 36b. Furthermore, the seat slide device 10 is in a state in which the first lock piece 30a is engaged with the first engagement portion 33a of the lower rail 5 from one side along the extending direction of the lower rail 5, and the second and second Any one of the three lock pieces 30b and 30c is configured to engage with the second engagement portion 33b of the lower rail 5 from the other direction side. The seat slide device 10 is configured so that the second lock piece 30b is engaged with the second engagement portion 33b of the lower rail 5 from one side along the extending direction of the lower rail 5, and the first and first Any one of the three lock pieces 30a, 30c is configured to engage with the first engaging portion 33a of the lower rail 5 from the other direction side.

According to the said structure, high reliability and a freedom degree of adjustment are securable with a simple structure.
(4) Each lock piece 30 (30a-30c) is formed integrally by sharing the fixing portion 34. Thereby, the further simplification of a structure can be aimed at. And the assembly operation | work with respect to the upper rail 6 can be made easy and efficient.

  (5) The seat slide device 10 includes a partition member 37 having two partition portions 37a and 37b that divide the inner side of the upper rail 6 into three in the width direction. And each lock piece 30 (30a-30c) is arrange | positioned inside the upper rail 6 in the aspect which pinches | interposes both these partition part 37a, 37b between each lever part 35. As shown in FIG.

  According to the said structure, the interference between each lock piece 30 (30a-30c) which carries out locking and unlocking operation | movement independently can be prevented. And thereby, higher reliability can be ensured by ensuring the smooth operation of each of these lock pieces 30.

  (6) The seat slide device 10 includes an unlock lever 43 that is supported between the upper rail 6 and disposed between the first and second engaging portions 33a and 33b on the lower rail 5 side. The unlock lever 43 is rotated to press each lock piece 30 and the insertion portion 41 of each lock piece 30 is separated from the first and second engaging portions 33a and 33b. Each lock piece 30 is configured to elastically deform in the direction. Thereby, it is possible to secure a reliable locking and unlocking operation of each lock piece 30 with a simple configuration.

[Second Embodiment]
Hereinafter, 2nd Embodiment regarding a vehicle seat slide apparatus is described according to drawing. For convenience of explanation, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIGS. 15A, 15B, and 16, the seat slide device 10B of the present embodiment is different from the first embodiment in the configuration of each lock piece 50.
Specifically, as shown in FIGS. 17 and 18, the seat slide device 10 </ b> B of the present embodiment includes a first lock piece 51 that engages with a first engagement portion 33 a formed on the lower rail 5, and a lower rail. 2 and a second lock piece 52 that engages with the second engagement portion 33b formed on the second engagement portion 33b.

  In the seat slide device 10B of the present embodiment, the first lock piece 51 has an insertion portion 53 (53a) that is inserted between the engagement claws 32 constituting the first engagement portion 33a, and is an upper rail. 6 extending in the direction intersecting with the extending direction. Similarly, the second lock piece 52 also has an insertion portion 53 (53b) inserted between the respective engagement claws 32 constituting the second engagement portion 33b and intersects the extending direction of the upper rail 6. It is extended in the direction to do. Each of the first and second lock pieces 51 and 52 is a leaf spring portion having a bent shape between the insertion portion 53 and the fixing portion 54 with respect to the upper rail 6 (upper wall portion 16). 55.

  Specifically, as shown in FIG. 17, the leaf spring portion 55a of the first lock piece 51 is an end portion on the first side wall portion 15a side of the upper rail 6 in the fixed portion 54a (the left end portion in the figure). ) To the second side wall 15b side (right side in the figure) of the upper rail 6 and bent downward in the vicinity of the second side wall 15b. Further, the leaf spring portion 55 a is folded upward in the vicinity of the bottom wall portion 11 of the lower rail 5. And the insertion part 53a of the 1st lock piece 51 is extended substantially horizontally toward the 1st side wall part 15a side of the upper rail 6 from the front-end | tip part of this leaf | plate spring part 55a.

  On the other hand, as shown in FIG. 18, the leaf spring portion 55 b of the second lock piece 52 extends from the end portion on the second side wall portion 15 b side of the upper rail 6 in the fixing portion 54 b (the right end portion in the figure) to the upper rail. 6 is folded back to the first side wall 15a side (left side in the figure) and is bent downward in the vicinity of the first side wall 15a. Further, the leaf spring portion 55 b is also folded upward in the vicinity of the bottom wall portion 11 of the lower rail 5. And the insertion part 53b of the 2nd lock piece 52 is extended substantially horizontally toward the 2nd side wall part 15b side of the upper rail 6 from the front-end | tip part of this leaf | plate spring part 55b.

  More specifically, as shown in FIG. 19, in the seat slide device 10B of the present embodiment, a plurality of first lock pieces 51 arranged at equal intervals share a fixed portion 54a and are integrally formed. A lock member 61 and a plurality of second lock pieces 52 that are also arranged at equal intervals are provided with a second lock member 62 that is formed integrally with a fixed portion 54b.

  In the seat slide device 10B according to the present embodiment, the first and second lock members 61 and 62 include three first lock pieces 51 and three second locks that share the fixing portions 54a and 54b, respectively. It has a piece 52. Further, each of the first and second lock members 61 and 62 has fixing portions 54a and 54b formed in a substantially plate shape. Further, as shown in FIG. 16 and FIGS. 20 to 22, the first and second lock members 61 and 62 are formed on the upper rail 6 in a state where the fixing portions 54 a and 54 b are overlapped in the plate thickness direction. It is fixed to the upper wall portion 16. Thus, in the seat slide device 10B of the present embodiment, the plurality of first lock pieces 51 and second lock pieces 52 are alternately arranged at equal intervals along the extending direction of the upper rail 6, respectively. It is configured to be arranged.

  In the present embodiment, the first and second lock members 61 and 62 are formed by plastic processing of a plate material. The first and second lock members 61 and 62 are assembled to each other in such a manner that the fixing portion 54a on the first lock member 61 side overlaps the fixing portion 54b on the second lock member 62 side. Further, the fixed portion 54b of the second lock piece 52 is formed with a bulging portion 66 that protrudes upward by the thickness of each of the fixed portions 54a and 54b, and is fixed on the first lock piece 51 side. The notch 67 into which the bulging portion 66 is fitted is formed in the portion 54b. Thus, the seat slide device 10B according to the present embodiment is integrally provided as each insertion portion 53a of the first lock piece 51 and the second lock member 62 which are integrally provided as the first lock member 61. Each insertion portion 53b of the second lock piece 52 thus formed is arranged at substantially the same vertical position (height).

  Further, as shown in FIGS. 15 to 18, the side wall portions 15 (15 a, 15 b) of the upper rail 6 are respectively inserted into the insertion portions 53 a of the first lock pieces 51 and the second lock pieces 52. A plurality of insertion holes 68 through which the insertion portion 53b is inserted are formed. In the present embodiment, each insertion hole 68 has a long hole shape extending in the vertical direction. The first and second lock pieces 51 and 52 are bent between the side wall portions 15 of the upper rail 6, that is, on the lower rail 5 side, in a state where the first and second lock pieces 51 and 52 are bent so as to push down the insertion portions 53a and 53b. It is the structure arrange | positioned between the 1st engaging part 33a and the 2nd engaging part 33b.

  That is, also in the seat slide device 10B of the present embodiment, the lock pieces 50 (51, 52) are respectively inserted into the insertion portions 53 (53a) based on the elastic restoring force generated by being bent as described above. , 53b) is pressed against each engaging portion 33 (33a, 33b) on the lower rail 5 side. Thus, in the seat slide device 10 </ b> B of the present embodiment, the insertion portion 53 of the lock piece 50 inserted between the engagement claws 32 constituting the engagement portion 33 on the lower rail 5 side extends the lower rail 5. By engaging with the engaging claw 32 from the direction, the relative movement of the upper rail 6 on which each lock piece 50 is supported is restricted (locked state).

  Further, in the seat slide device 10B of the present embodiment, the unlock lever 43B has the distal end portions of the side plate portions 43a and 43b at the insertion portions 53a and 53b of the first and second lock pieces 51 and 52, respectively. It is arranged above. And the unlock lever 43B of this embodiment is rotated clockwise in FIG.15 (b) by this, and each insertion part 53a, 53b of the 1st and 2nd lock pieces 51 and 52 is carried out. Is configured to be pushed down.

  That is, also in the seat slide device 10B of the present embodiment, the unlock lever 43B has the insertion portion 53 (53a, 53b) of each lock piece 50 (51, 52) against the lower rail 5 side against its elastic restoring force. Each lock piece 50 (51, 52) is configured to be elastically deformed in a direction of being detached from the engaging portion 33 (33a, 33b). Then, the seat slide device 10B of the present embodiment allows the insertion portion 53 of each lock piece 50 to be removed from the engagement claws 32 on the lower rail 5 side, thereby releasing the restraint of the upper rail 6; That is, the relative movement of the upper rail 6 with respect to the lower rail 5 is allowed (unlocked state).

(Fine-step slide function and constant meshing structure)
Next, a fine slide function and a constant mesh structure in the seat slide device 10B of the present embodiment will be described.

  As shown in FIG. 23, also in the seat slide device 10B of the present embodiment, the groove width W0 between the engaging claws 32 constituting the engaging portions 33 (33a, 33b) on the lower rail 5 side is It is set wider than the insertion width W1 of the insertion portion 53 (53a, 53b) in the piece 50 (51, 52). That is, the seat slide device 10B of the present embodiment is similar to the seat slide device 10 of the first embodiment in that each lock piece 50 (51, 52) inserted between the engagement claws 32 on the lower rail 5 side. The insertion portion 53 (53a, 53b) is configured to be able to change the insertion position between the engaging claws 32 along the extending direction of the lower rail 5.

  Further, as shown in FIGS. 23 to 29, in the seat slide device 10B of the present embodiment, the insertion portion 53a of the first lock piece 51 is the first regardless of the movement position of the upper rail 6 with respect to the lower rail 5. The insertion portions 53b of the second lock piece 52 are inserted between the engagement claws 32 of the second engagement portion 33b. Further, the first lock piece 51 is engaged with the first engagement portion 33a from one side along the extending direction of the lower rail 5, and the second lock piece is engaged with the second engagement portion 33b. When 30b is engaged from the other direction side along the extending direction of the lower rail 5, the relative movement of the upper rail 6 with respect to the lower rail 5 is restricted. Further, in the present embodiment, the first and second engaging portions 33a and 33b on the lower rail 5 side each other by “½” of the interval (formation pitch P) at which the engaging claws 32 are formed. Are out of phase. The seat slide device 10B according to the present embodiment can adjust the movement position of the upper rail 6 with the minimum movement distance that reverses the direction in which each insertion portion 53 engages with each engagement claw 32 as the adjustment pitch C. It has become.

  More specifically, the seat slide device 10B according to the present embodiment has the first position located on the most front side of the vehicle (the left side in the figure) when the upper rail 6 is in the relative movement position shown in FIGS. The insertion portion 53a of one lock piece 51 is inserted between the engagement claws 32 constituting the first engagement portion 33a of the lower rail 5. At this time, the insertion portion 53b of the second lock piece 52 located closest to the vehicle rear side (right side in the figure) is inserted between the engagement claws 32 constituting the second engagement portion 33b. The Further, at this time, the insertion portion 53a of the first lock piece 51 inserted between the engagement claws 32 on the first engagement portion 33a side is the vehicle with respect to the engagement claws 32 positioned on the vehicle front side. The insertion portion 53b of the second lock piece 52 that is engaged from the rear side and is inserted between the engagement claws 32 on the second engagement portion 33b side is opposed to the engagement claw 32 that is located on the vehicle rear side. Engage from the front side of the vehicle. Thus, the seat slide device 10B of the present embodiment is configured such that the upper rail 6 is held at the relative movement position shown in FIGS. 23 (a) and 23 (b).

  Next, as shown in FIGS. 24 (a) and 24 (b), by moving the upper rail 6 relative to the front side of the vehicle by one step of the adjustment pitch, between the engaging claws 32 constituting the second engaging portion 33b. The insertion portion 53b of the second lock piece 52 that is inserted in the most rearward side of the vehicle is engaged with the engagement claw 32 that is located on the front side of the vehicle from the rear side of the vehicle. At this time, with respect to the first engagement portion 33a, the insertion portion 53a of the first lock piece 51 located on the most rear side of the vehicle has each engagement constituting the first engagement portion 33a. Inserted between the claws 32. The seat slide device 10B of the present embodiment is configured so that the insertion portion 53a of the first lock piece 51 is engaged with the engagement claw 32 located on the vehicle rear side from the vehicle front side. The upper rail 6 is held at the relative movement position shown in FIGS. 24 (a) and 24 (b).

  Subsequently, as shown in FIGS. 25 (a) and 25 (b), the engagement rails 32 constituting the first engagement portion 33a are further moved by relatively moving the upper rail 6 toward the vehicle front side by one adjustment pitch. The insertion portion 53a of the first lock piece 51 that is inserted in the most position on the rear side of the vehicle engages with the engagement claw 32 that is positioned on the front side of the vehicle from the rear side of the vehicle. At this time, with respect to the second engagement portion 33b, the insertion portion 53b of the second lock piece 52 positioned at the intermediate portion in the vehicle front-rear direction constitutes each second engagement portion 33b. It is inserted between the engaging claws 32. The seat slide device 10B of the present embodiment is configured such that the insertion portion 53b of the second lock piece 52 is engaged with the engagement claw 32 located on the vehicle rear side from the vehicle front side. The upper rail 6 is held at the relative movement position shown in FIGS. 25 (a) and 25 (b).

  Next, as shown in FIGS. 26 (a) and 26 (b), by further moving the upper rail 6 relative to the vehicle front side by one adjustment pitch, the respective engagement claws 32 constituting the second engagement portion 33b. The insertion portion 53b of the second lock piece 52 that is inserted in the middle in the vehicle longitudinal direction engages with the engagement claw 32 that is located on the vehicle front side from the vehicle rear side. At this time, with respect to the first engagement portion 33a, the insertion portion 53a of the first lock piece 51 located at the intermediate portion in the vehicle front-rear direction constitutes the first engagement portion 33a. It is inserted between the engaging claws 32. The seat slide device 10B of the present embodiment is configured so that the insertion portion 53a of the first lock piece 51 is engaged with the engagement claw 32 located on the vehicle rear side from the vehicle front side. The upper rail 6 is held at the relative movement position shown in FIGS. 26 (a) and 26 (b).

  Subsequently, as shown in FIGS. 27 (a) and 27 (b), the engaging rails 32 constituting the first engaging portion 33a are further moved by relatively moving the upper rail 6 toward the vehicle front side by one adjustment pitch. The insertion portion 53a of the first lock piece 51 located in the middle portion in the vehicle front-rear direction inserted therebetween engages with the engagement claw 32 located on the vehicle front side from the vehicle rear side. Further, at this time, with respect to the second engagement portion 33b, the insertion portion 53b of the second lock piece 52 located closest to the vehicle front side has each engagement constituting the second engagement portion 33b. Inserted between the claws 32. The seat slide device 10B of the present embodiment is configured such that the insertion portion 53b of the second lock piece 52 is engaged with the engagement claw 32 located on the vehicle rear side from the vehicle front side. The upper rail 6 is held at the relative movement position shown in FIGS. 27 (a) and 27 (b).

  Next, as shown in FIGS. 28 (a) and 28 (b), by further moving the upper rail 6 relative to the vehicle front side by one adjustment pitch, each engagement claw 32 constituting the second engagement portion 33b. The insertion portion 53b of the second lock piece 52, which is inserted in the middle and located closest to the vehicle front side, engages with the engagement claw 32 located on the vehicle front side from the vehicle rear side. Further, at this time, with respect to the first engagement portion 33a, the insertion portion 53a of the first lock piece 51 located closest to the front side of the vehicle has each engagement constituting the first engagement portion 33a. Inserted between the claws 32. The seat slide device 10B of the present embodiment is configured so that the insertion portion 53a of the first lock piece 51 is engaged with the engagement claw 32 located on the vehicle rear side from the vehicle front side. The upper rail 6 is held at the relative movement position shown in FIGS. 28 (a) and 28 (b).

  Subsequently, as shown in FIGS. 29 (a) and 29 (b), by further moving the upper rail 6 relative to the vehicle front side by one adjustment pitch, each engagement claw 32 constituting the first engagement portion 33a. The insertion portion 53a of the first lock piece 51 located in the most vehicle front side inserted therebetween engages with the engagement claw 32 located in the vehicle front side from the vehicle rear side. Further, at this time, with respect to the second engagement portion 33b, the insertion portion 53b of the second lock piece 52 located closest to the vehicle rear side has each engagement constituting the second engagement portion 33b. Inserted between the claws 32. The seat slide device 10B of the present embodiment is configured such that the insertion portion 53b of the second lock piece 52 is engaged with the engagement claw 32 located on the vehicle rear side from the vehicle front side. The upper rail 6 is held at the relative movement position shown in FIGS. 29 (a) and 29 (b).

  That is, as shown in FIGS. 23 to 29, the seat slide device 10 </ b> B according to the present embodiment is formed with respect to the formation pitch P of the engagement claws 32 constituting the engagement portion 33 (33 a, 33 b) on the lower rail 5 side. The relative movement of the upper rail 6 can be adjusted with an adjustment pitch C corresponding to the total number (six) of the lock pieces 50 (insert portions 53) (C = P / 6). Even when the relative movement position of the upper rail 6 is between the adjustment pitches, any one of the insertion portions 53 of each lock piece 50 is disposed at a position where the insertion portion 53 is inserted between the engagement claws 32. ing. Thus, the seat slide device 10B according to the present embodiment can ensure high reliability.

(Collision safety structure)
Next, a collision safety structure in the seat slide device 10B of the present embodiment will be described.

  As shown in FIGS. 30 (a) to 30 (d) and FIGS. 31 (a) to 31 (d), when the vehicle collides forward, the upper rail 6 moves toward the vehicle front side together with the seat 1 supported above due to inertia. Try to move. As a result, the lock pieces 50 (51, 52) interposed between the upper rail 6 and the lower rail 5, more specifically, the insertion portions 53 (53a, 53b) are formed on the lower rail 5. The engaging portion 33 (33a, 33b) is deformed.

  That is, each lock piece 50 supported by the upper rail 6 moves relative to the lower rail 5 together with the upper rail 6 toward the front side of the vehicle. As a result, in this example, as shown in FIG. 30 (a), the vehicle front side (in each drawing) inserted between the respective engagement claws 32 constituting the first engagement portion 33a on the lower rail 5 side. The insertion portion 53a of the first lock piece 51 located on the left side deforms the engagement claw 32 so as to bite into the engagement claw 32 located on the vehicle front side. And as shown to Fig.31 (a), this engagement nail | claw 32 will incline to the vehicle front side by being pressed by the insertion part 53a of the 1st lock piece 51. FIG.

  Further, as shown in FIG. 30 (d), it is located on the most rear side (right side in each figure) inserted between the engaging claws 32 constituting the second engaging portion 33b on the lower rail 5 side. Similarly, the insertion portion 53b of the second lock piece 52 deforms the engagement claw 32 in a manner of biting into the engagement claw 32 located on the vehicle front side. Then, as shown in FIG. 31 (d), the engaging claw 32 that presses toward the vehicle front side is tilted according to the relative movement amount with respect to the lower rail 5.

  On the other hand, each lock piece 50 in which the insertion portion 53 is not inserted between the engagement claws 32 on the lower rail 5 side can be relatively moved together with the upper rail 6 toward the vehicle front side. Thus, in the seat slide device 10B of the present embodiment, the insertion portion 53 of the lock piece 50 that originally was in a position where it interferes with each engagement claw 32 at the time of a frontal collision of the vehicle has each engagement claw. It is comprised so that it may insert between 32.

  That is, the lock piece 50 in which the insertion portion 53 is inserted between the engaging claws 32 on the lower rail 5 side is restricted from relative movement with respect to the lower rail 5, so that the side of the insertion hole 68 through which the insertion portion 53 is inserted. The respective side wall portions 15 of the upper rail 6 are deformed in a manner of biting into the wall surface, and move relative to the upper rail 6. As shown in FIGS. 30B, 30C, 31B, and 31C, in this example, the first lock piece 51 positioned closest to the vehicle front side and positioned closest to the vehicle rear side. The second lock piece 52 corresponds to the lock piece 50 whose relative movement with respect to the lower rail 5 is restricted.

  However, the remaining lock pieces 50 whose insertion portions 53 are not inserted between the engaging claws 32 on the lower rail 5 side move together with the upper rail 6 to the front side of the vehicle. As a result, in this example, as shown in FIG. 30 (a), first, the insertion portion 53a of the first lock piece 51 located closest to the vehicle rear side is provided for the first engagement portion 33a. The first engaging portion 33a is inserted between the engaging claws 32. Further, as shown in FIG. 31 (a), the insertion portion 53a of the first lock piece 51 located in the vehicle front-rear direction intermediate portion is the insertion portion 53a of the first lock piece 51 located closest to the vehicle front side. It is inserted between the same engaging claws 32. Similarly, as shown in FIGS. 30 (d) and 31 (d), the insertion portion 53a of the first lock piece 51 located at the intermediate portion in the vehicle front-rear direction also with respect to the second engagement portion 33b. However, it is inserted between the engaging claws 32 constituting the second engaging portion 33b. The seat slide device 10B according to the present embodiment increases the number of insertion portions 53 of the lock piece 50 inserted between the engaging claws 32 on the lower rail 5 side at the time of a frontal collision of the vehicle. 6 is configured to suppress the unlocking state.

As described above, according to the present embodiment, the following effects can be obtained.
(1) The seat slide device 10 </ b> B has an insertion portion 53 (53 a) inserted between the engagement claws 32 constituting the first engagement portion 33 a in the lower rail 5 and intersects the extending direction of the upper rail 6. A plurality of first lock pieces 51 extending in the direction are provided. Further, the seat slide device 10 </ b> B has an insertion portion 53 (53 b) inserted between the engagement claws 32 constituting the second engagement portion 33 b in the lower rail 5 and intersects the extending direction of the upper rail 6. A plurality of second lock pieces 52 are provided. Each of the first and second lock pieces 51 and 52 is a leaf spring portion having a bent shape between the insertion portion 53 and the fixing portion 54 with respect to the upper rail 6 (upper wall portion 16). 55.

  According to the above configuration, the plurality of lock pieces 50 (51, 52) supported by the upper rail 6 are efficiently (compactly) arranged between the first and second engaging portions 33a, 33b on the lower rail 5 side. can do. Further, by providing the leaf spring portion 55 having a bent shape between the insertion portion 53 and the fixing portion 54, a large elastic restoring force can be generated without increasing the installation space of each lock piece 50. it can. And thereby, each lock piece 50 can be operated more smoothly and reliably. As a result, higher reliability can be ensured.

  (2) The seat slide device 10B includes a plurality of first locking members 51 in which a plurality of first lock pieces 51 arranged at equal intervals share the fixed portion 54a and are integrally formed. The second lock piece 52 includes a second lock member 62 formed integrally with the fixed portion 54b. The first and second lock members 61 and 62 are fixed to the upper wall portion 16 of the upper rail 6 by superimposing the mutual fixing portions 54 (54a and 54b). The lock pieces 52 are configured so as to be alternately arranged along the extending direction of the upper rail 6.

  According to the above configuration, the plurality of lock pieces 50 (51, 52) supported by the upper rail 6 are more efficiently (compact) between the first and second engaging portions 33a, 33b on the lower rail 5 side. Can be arranged. And the assembly operation | work with respect to the upper rail 6 can be made easy and efficient.

  (3) In the seat slide device 10 </ b> B, when the vehicle collides forward, the lock pieces 50 in which the insertion portions 53 are not inserted between the engagement claws 32 on the lower rail 5 side move together with the upper rail 6 to the vehicle front side. Thus, the insertion portion 53 of the lock piece 50 that is originally in a position where it interferes with each engagement claw 32 is configured to be inserted between each engagement claw 32.

  According to the said structure, the insertion part 53 of the lock piece 50 inserted between each engaging claw 32 by the side of the lower rail 5 increases at the time of a vehicle front collision. And thereby, it is possible to ensure high collision safety by suppressing the upper rail 6 from being unlocked.

[Third Embodiment]
Hereinafter, a third embodiment relating to a vehicle seat slide device will be described with reference to the drawings. For convenience of explanation, the same reference numerals are given to the same configurations as those of the above-described embodiments, and the description thereof is omitted.

  As shown in FIG. 32, the seat slide device 73 of the present embodiment engages with a first engagement portion 33a formed on the lower rail 5 in the same manner as the seat slide device 10B in the second embodiment. , And a second lock piece 52 that engages with a second engagement portion 33 b formed on the lower rail 5. Each of the first and second lock pieces 51 and 52 has an insertion portion 53 for each of the engaging claws 32 on the lower rail 5 side. And the insertion part 53 (53a) of the 1st lock piece 51 and the insertion part 53 (53b) of the 2nd lock piece 52 which were most separated in the extending direction of the lower rail 5 are the reciprocal along the extending direction of the lower rail 5 It is comprised so that it may engage with the engaging claw 32 on the lower rail 5 side from the direction to do.

  More specifically, the total number of the first and second lock pieces 51 and 52 that can be engaged with the respective engaging portions 33 (33a and 33b) on the lower rail 5 side, specifically, the insertion portions that are independently engaged and disengaged. When the total number of 53 (53a, 53b) is “n” and the claw width of each engagement claw 32 is “W2”, the seat slide device 73 of the present embodiment is configured to satisfy the following expressions. Has been.

P = W1 + W2 + C (1)
P = n × C (2)
In the above formulas, “P” is the formation pitch of each engaging claw 32, and “W1” is the insertion width of the insertion portion 53 (53a, 53b). “C” is an adjustment pitch of the upper rail 6 with respect to the lower rail 5.

  That is, the minimum moving distance that reverses the direction in which each insertion portion 53 engages each engagement claw 32 is the adjustment pitch C according to the above equation (1). Then, according to the above equation (2), the adjustment pitch C is set to a value obtained by dividing the formation pitch P of each engagement claw 32 by the total number n of the insertion portions 53.

  More specifically, the seat slide device 73 includes six first and second lock pieces 51 and 52, three in total. In the seat slide device 73, the first and second engaging portions 33a and 33b on the lower rail 5 side have no phase difference, and the first and second lock pieces 51 and 52 are The insertion portions 53 are alternately arranged at equal intervals. Further, in the seat slide device 73, the insertion portion 53a of the first lock piece 51 located on the most front side (left side in the figure) has the first engagement portion 33a from the rear side (right side in the figure). When engaging with the engaging claw 32, the insertion portion 53b of the second lock piece 52 located on the most rear side is engaged with the engaging claw 32 of the second engaging portion 33b from the front side. Has been. In this embodiment, by setting the pitch Z between the insertion portion 53a of the first lock piece 51 and the insertion portion 53b of the second lock piece 52 so as to satisfy the relationship of the following formula, A sliding and constant meshing function is ensured.

P × (n−1) = Z × n (3)
That is, when the total number of the first and second lock pieces 51 and 52 (inserted portions 53) alternately arranged at equal intervals in the extending direction of the lower rail 5 is “n”, the two most distant 2 The number of the engaging claws 32 arranged in the extending direction of the lower rail 5 required for the two insertion portions 53 to engage with the first and second engaging portions 33a, 33b on the lower rail 5 side is “n”. is there. Furthermore, when these two most distant insertion parts 53 engage with the engaging claws 32 on the lower rail 5 side in the direction of separating from each other, the lock on the lower rail 5 side represented by the “n engaging claws” is provided. The engagement width W <b> 3 is “n−1” times the formation pitch P of each engagement claw 32. Therefore, the total number n of the first and second lock pieces 51 and 52 (insertion portion 53) and the formation pitch P of each engagement claw 32 are substituted into the above equation (3), and the first lock piece 51 is obtained. By determining the pitch Z between the insertion portion 53a and the insertion portion 53b of the second lock piece 52, the above-described fine slide and the constant meshing function can be ensured.

[Fourth Embodiment]
Hereinafter, 4th Embodiment regarding a vehicle seat slide apparatus is described according to drawing. For convenience of explanation, the same reference numerals are given to the same configurations as those of the above-described embodiments, and the description thereof is omitted.

  As shown in FIG. 33, the seat slide device 74 of the present embodiment is different from the seat slide device 73 of the third embodiment in that each insertion portion 53 in the first and second lock pieces 51 and 52. The pitch Y, that is, the interval between the insertion portions 53a in the first lock piece 51 and the interval between the insertion portions 53b in the second lock piece 52 are changed.

  Specifically, the seat slide device 74 is based on the seat slide device 73 in the third embodiment, and each insertion portion in the first and second lock pieces 51 and 52 so as to satisfy the following formula. A pitch Y of 53 is set.

Y = 2 × Z−P (Y> 0) (4)
That is, in the seat slide device 73 in the third embodiment, the lock engagement width W4 on the upper rail 6 side formed by the first and second lock pieces 51 and 52 (the respective insertion portions 53) is the lock The value is obtained by subtracting the claw width W2 of the engagement claw 32 from the engagement width W3 (see FIG. 32, W4 = W3-W2).

  However, by setting the pitch Y of each insertion portion 53 in the first and second lock pieces 51 and 52 using the above equation (4), each insertion can be performed without impairing the fine slide and the constant meshing function. The pitch Y of the part 53 can be reduced. As a result, the lock engagement width W4 on the upper rail 6 side formed by the first and second lock pieces 51 and 52 (each insertion portion 53 thereof) is shortened, and each lock is more efficiently (compactly). Pieces 50 (51, 52) can be arranged.

[Fifth Embodiment]
Hereinafter, 5th Embodiment regarding the vehicle seat slide apparatus is described according to drawing. For convenience of explanation, the same reference numerals are given to the same configurations as those of the above-described embodiments, and the description thereof is omitted.

  As shown in FIG. 34, in the seat slide device 75 of the present embodiment, a phase difference X2 is set between the first and second engaging portions 33a and 33b on the lower rail 5 side. Specifically, the seat slide device 75 is based on the seat slide devices 73 and 74 in the third and fourth embodiments, so that the first and second lock pieces 51 satisfy the following formula. , 52 and a phase difference X2 between the first and second engaging portions 33a, 33b on the lower rail 5 side are set.

X1 = Z−X2 (5)
That is, by using the above equation (5), the phase difference X1 between the first and second lock pieces 51 and 52 and the first and second on the lower rail 5 side without impairing the fine slide and the constant meshing function. The phase difference X2 between the second engaging portions 33a and 33b can be changed. Then, by reducing the phase difference X1 between the first and second lock pieces 51, 52, the lock engagement width W4 on the upper rail 6 side is shortened, and more efficiently (compactly), The lock piece 50 (51, 52) can be disposed.

  As shown in FIG. 35, the lock engagement width W4 on the upper rail 6 side is minimum when the phase difference X1 between the first and second lock pieces 51 and 52 is set to “0”. And the phase difference X1 between the 1st and 2nd lock pieces 51 and 52 is set to "1/2" of the formation pitch P of each engaging claw 32, The 1st and 2nd lock pieces 51, Interference between 52 can be prevented.

[Sixth Embodiment]
Hereinafter, a sixth embodiment relating to a vehicle seat slide device will be described with reference to the drawings. For convenience of explanation, the same reference numerals are given to the same configurations as those of the above-described embodiments, and the description thereof is omitted.

  As shown in FIG. 36, when compared with the seat slide device 73 in the third embodiment, the seat slide device 76 of the present embodiment has two insertion portions 53 that are most separated in the extending direction of the lower rail 5, Each is configured to engage with the first and second engaging portions 33a, 33b on the lower rail 5 side from opposite engaging directions.

  Specifically, in the seat slide device 76, the insertion portion 53a of the first lock piece 51 located on the most front side (left side in the figure) has a first engagement from the front side (left side in the figure). When engaging with the engaging claw 32 of the joint portion 33a, the insertion portion 53b of the second lock piece 52 located on the rearmost side engages with the engaging claw 32 of the second engaging portion 33b from the rear side. It is configured as follows. In this embodiment, by setting the pitch Z between the insertion portion 53a of the first lock piece 51 and the insertion portion 53b of the second lock piece 52 so as to satisfy the relationship of the following formula, A sliding and constant meshing function is ensured.

P × (n + 1) = Z × n (6)
That is, in this case as well, as in the third embodiment, the two insertion portions 53 that are most separated in the extending direction of the lower rail 5 are connected to the first and second engaging portions 33a and 33b on the lower rail 5 side. The number of the engaging claws 32 arranged in the extending direction of the lower rail 5 required for the engagement is “n”. However, when these two most distant insertion portions 53 engage with the engaging claws 32 in a direction in which the engaging claws 32 on the lower rail 5 side are sandwiched between them, the “n engaging claws” The lock engagement width W5 on the lower rail 5 side represented by "" is "n + 1" times the formation pitch P of each engagement claw 32. Therefore, the total number n of the first and second lock pieces 51 and 52 (insertion portion 53) and the formation pitch P of each engagement claw 32 are substituted into the above equation (6), and the first lock piece 51 is obtained. By determining the pitch Z between the insertion portion 53a and the insertion portion 53b of the second lock piece 52, the fine slide and the constant meshing function can be ensured as in the third embodiment.

  In this case, the lock engagement width W6 on the upper rail 6 side is obtained by multiplying the formation pitch P of the engagement claws 32 by the total number n of the first and second lock pieces 51, 52 and the insertion portion 53 (53a, 53a, 53b) is added to a value obtained by doubling the insertion width W1 (see FIG. 32, W6 = P × n + W1 × 2).

  Further, even when the seat slide device 76 of the present embodiment is used as a basis, the fine slide and the constant meshing function are obtained by using the above equation (4) as in the design method of the seat slide device 74 in the fourth embodiment. The pitch Y of each insertion portion 53 in the first and second lock pieces 51 and 52 can be shortened without impairing the above. Then, similarly to the design method of the seat slide device 75 in the fifth embodiment, the first and second locks can be obtained without impairing the fine slide and the constant meshing function by using the equation (5). The phase difference X1 between the pieces 51 and 52 and the phase difference X2 between the first and second engaging portions 33a and 33b on the lower rail 5 side can be arbitrarily set.

In addition, you may change each said embodiment as follows.
In each of the above embodiments, the insertion portion (41, 43) of each lock piece (30, 50) moves upward based on the elastic restoring force to engage with the engagement portion 33 on the lower rail 5 side, thereby unlocking the mechanism. By being pushed down by the unlock levers (43, 43B) constituting the detachment from the engagement portion 33 on the lower rail 5 side. However, the present invention is not limited to this, and may be engaged by moving downward based on the elastic restoring force, and may be released by being pushed up by the unlock mechanism. The configuration of the unlock mechanism may also be arbitrarily changed.

  Each of the seat slide devices (10B, 73 to 76) in the second to sixth embodiments has three first and second lock pieces 51 and 52, respectively, in detail. The insertion portion 53 (53a, 53b) that engages and disengages is provided. However, the present invention is not limited to this, and the total number n of the first and second lock pieces 51 and 52 and the insertion portions 53 that are independently engaged and disengaged may be arbitrarily changed.

  The design method of each seat slide device (73 to 76) in the third to sixth embodiments is the same as the seat slide device 77 shown in FIG. 37 and the seat slide device 78 shown in FIG. Further, the present invention may be applied to the case where the total number n of the second lock pieces 51 and 52 (the insertion portion 53 thereof) is an odd number (for example, five in these examples). Thereby, the fine slide and the constant meshing function can be easily ensured. And the pitch Y of each insertion part 53 in the 1st and 2nd lock pieces 51 and 52 is shortened without impairing the fine slide and the constant meshing function, and between the 1st and 2nd lock pieces 51 and 52 And the phase difference X2 between the first and second engaging portions 33a and 33b on the lower rail 5 side can be arbitrarily set.

  In each of the above embodiments, the lock pieces (30, 50) sharing the fixing portions (34, 54) with respect to the upper rail 6 are used. However, the lock pieces formed independently are used. May be.

  In the second embodiment, the first lock member 61 in which the plurality of first lock pieces 51 share the fixed portion 54a and are integrally formed, and the plurality of second lock pieces 52 are also the fixed portion. The second lock member 62 that is integrally formed by sharing 54b is fixed to the upper rail 6 in a state where the fixing portions 54a and 54b are overlapped with each other (see FIG. 20). However, the present invention is not limited to this. For example, a plurality of first and second lock pieces 51 and 52 share a fixed portion 81 and are integrated as a lock member 80 shown in FIGS. It is good also as a structure formed.

  In the second embodiment, the bent shape of the leaf spring portion 55 is folded back from the side end portion on one side of the fixing portion 54 to the other side and faces downward in the vicinity of the side wall portion of the upper rail 6. Then, it is further folded back in the vicinity of the bottom wall portion 11 of the lower rail 5 (see FIG. 21). Not only this but the structure which has the leaf | plate spring part 82 extended | folded downward from the fixing | fixed part 81, and turned up like the lock member 80 shown to FIG. 39 (a)-(c) etc., for example The bent shape of the leaf spring portion may be arbitrarily changed.

  Furthermore, the first and second lock members 61 and 62 do not necessarily have to be fixed to the upper rail 6 in a state in which the fixing portions 54a and 54b are overlapped with each other. By fixing, the 1st and 2nd lock pieces 51 and 52 may be arranged alternately.

  In the first embodiment, each lock piece 30 (30a to 30c) includes a lock engagement portion 36 provided at the tip of the lever portion 35. The rod-shaped portion left by forming the through hole 40 in the lock engagement portion 36 is used as the insertion portion 41 inserted between the engagement claws 32 on the lower rail 5 side. However, the present invention is not limited to this. For example, as shown in FIGS. 40A to 40C, an insertion portion 91 extending in a direction intersecting the lever portion 35 is formed at the tip of each lock piece 90A (90a, 90b). It is good also as a structure.

  -Moreover, as shown to Fig.41 (a)-(c), each lock piece 90B (90a, 90b) is good also as a structure which shares the lever part 35B. That is, in this case, each insertion portion 91B itself is elastically deformed. The locking member used in the second embodiment also has a configuration that does not include a leaf spring portion having a bent shape, such as one in which the insertion portion 53 itself extending from the fixing portion 54 is elastically deformed. It is good.

Next, technical ideas that can be grasped from the above embodiments will be described together with effects.
(A) A vehicular seat slide device comprising a partition member that partitions the lever portions of the lock pieces.

  According to the above configuration, it is possible to prevent interference between the lock pieces that perform the locking and unlocking operations independently. And thereby, higher reliability can be ensured by ensuring the smooth operation of each of these lock pieces.

  (B) It is disposed between the first and second engaging portions by being supported by the upper rail and is rotated so as to press the lock pieces so that the insertion portions are the first and second A vehicle seat slide device comprising: an unlock lever that elastically deforms each of the lock pieces in a direction away from the second engagement portion. Thereby, a highly reliable unlocking mechanism can be formed with a simple configuration.

  (C) The upper rail includes a pair of side wall portions and an upper wall portion connecting the side wall portions, and the lock pieces are fixed to the upper wall portion. apparatus.

  (D) At the time of a frontal collision of the vehicle, each lock piece, in which the insertion portion is not inserted, moves between the engagement claws on the lower rail side together with the upper rail, thereby moving each engagement. A vehicular seat slide device characterized in that an insertion portion of the lock piece located at a position where it interferes with a pawl is inserted between the engaging claws.

  According to the said structure, the insertion part of the lock piece inserted between each engaging claw by the side of a lower rail at the time of the front collision of a vehicle increases. And thereby, it is possible to ensure high collision safety by suppressing the upper rail from being unlocked.

(E) The following formula, Y = 2 × ZP (Y> 0)
(However, Y: pitch of the insertion part in the first and second lock pieces)
The vehicle seat slide device design method for setting the pitch of the insertion portion in the first and second lock pieces so as to satisfy the above.

  According to the said structure, the pitch of the insertion part in a 1st and 2nd lock piece can be shrunk | reduced, without impairing a fine slide and a constant meshing function. And thereby, the lock engagement width | variety by the side of the upper rail which each insertion part of the 1st and 2nd lock piece forms reduces, and each lock piece can be arrange | positioned more efficiently (compactly).

(F) The following formula, X1 = Z-X2
(Where X1: phase difference between the first and second lock pieces, X2: phase difference between the first and second engaging portions)
A design method for a vehicle seat slide device in which the respective phase differences are set so as to satisfy the above.

  According to the above configuration, the phase difference between the first and second lock pieces and the phase difference between the first and second engaging portions on the lower rail side are obtained without impairing the fine slide and the constant meshing function. Can be changed. Then, by reducing the phase difference between the first and second lock pieces, the lock engagement width on the upper rail side is shortened, and the lock pieces are arranged more efficiently (compactly). Can do.

  DESCRIPTION OF SYMBOLS 1 ... Seat, 6 ... Upper rail, 10 ... Seat slide apparatus, 14 ... Inner wall part, 14a ... First inner wall part, 14b ... Second inner wall part, 15 ... Side wall part, 15a ... First side wall part, 15b ... Second side wall , 16 ... upper wall part, 30 ... lock piece, 30a ... first lock piece, 30b ... second lock piece, 30c ... third lock piece, 31 ... lock mechanism, 32 ... engagement claw, 33 ... Engaging portion, 33a ... first engaging portion, 33b ... second engaging portion, 34 ... fixing portion, 35, 35B ... lever portion, 36 ... lock engaging portion, 36a ... first lock engaging portion ( (First insertion portion), 36b ... second lock engagement portion (second insertion portion), 37 ... partition member, 37a ... partition portion, 37b ... partition portion, 40 ... through hole, 41 ... insertion portion, 43, 43B ... Unlock lever (unlock mechanism), 48 ... Operation handle, 10B Seat slide device, 50 ... lock piece, 51 ... first lock piece, 52 ... second lock piece, 53 (53a, 53b) ... insertion part, 54 (54a, 54b) ... fixing part, 55 (55a, 55b) ) ... leaf spring part, 61 ... first lock member, 62 ... second lock member, 73-78 ... seat slide device, 80 ... lock member, 81 ... fixing part, 82 ... leaf spring part, 90A, 90B ... Lock piece, 91, 91B ... insertion part, W0 ... groove width, W1 ... insertion width, W2 ... claw width, W3, W5 ... lock engagement width on the lower rail side, W4, W6 ... lock engagement width on the upper rail side, P ... Formation pitch, C ... Adjustment pitch, n ... Total number, Z ... Pitch between insertion part of first lock piece and insertion part of second lock piece, Y ... Each insertion part in first and second lock pieces Pitch, X1 ... Phase difference, X2 ... phase difference between the first and second engagement portions between the first and second lock piece.

Claims (8)

An upper rail that supports the seat upward,
A lower rail that supports the upper rail in a relatively movable manner;
First and second engaging portions provided on the lower rail having a plurality of engaging claws arranged at equal intervals along the extending direction;
The first and second engagements include a fixing portion for the upper rail and an insertion portion inserted between the engagement claws by being pressed against the engagement portion on the lower rail side based on an elastic restoring force. A plurality of lock pieces arranged between the sections;
An unlock mechanism that elastically deforms each lock piece in a direction in which the insertion portion separates from the first and second engaging portions against the elastic restoring force,
In a state where at least one of the insertion portions engages with the engaging claw on the lower rail side from one direction side along the extending direction of the lower rail, at least one of the insertion portions is connected to the lower rail. While engaging from the other direction side along the stretching direction,
A vehicle seat slide device configured such that at least any one of the insertion portions is inserted between the engaging claws regardless of a movement position of the upper rail with respect to the lower rail. The vehicle seat slide device according to claim 1,
In a state where at least one of the insertion portions engages with the engagement claw on the first engagement portion side from one direction side along the extending direction of the lower rail, the second engagement portion A vehicle seat slide device, wherein at least one of the insertion portions is engaged with the engaging claw on the side from the other direction side along the extending direction of the lower rail. In the vehicle seat slide device according to claim 1 or 2,
A plurality of the lock pieces are formed integrally by sharing the fixing portion;
A vehicle seat slide device. In the vehicle seat slide device according to any one of claims 1 to 3,
Each of the lock pieces is
A lever portion extending in the extending direction of the upper rail from the fixed portion;
The insertion portion extending in a direction intersecting the lever portion;
A vehicle seat slide device. In the vehicle seat slide device according to any one of claims 1 to 4,
A first lock piece having the first insertion portion inserted between the engagement claws on the first engagement portion side;
A second lock piece having the second insertion portion inserted between the respective engagement claws on the second engagement portion side;
A third lock piece having the first and second insertion portions, and
In a state where the first lock piece engages with the first engagement portion from one direction side along the extending direction of the lower rail, the second and second engagement portions with respect to the second engagement portion. Any one of the three lock pieces is engaged from the other direction along the extending direction of the lower rail, and
In a state where the second lock piece engages with the second engagement portion from one side along the extending direction of the lower rail, the first or second engagement with the first engagement portion is performed. Any one of the three lock pieces is configured to be engaged from the other direction side along the extending direction of the lower rail. In the vehicle seat slide device according to any one of claims 1 to 3,
A first lock piece having the insertion portion inserted between the engagement claws on the first engagement portion side;
A second lock piece having the insertion portion inserted between the engagement claws on the second engagement portion side,
The first and second lock pieces extend in a direction intersecting the extending direction of the upper rail and include a leaf spring portion having a bent shape between the fixing portion and the insertion portion. A vehicle seat slide device characterized by the above. The vehicle seat slide device according to claim 6,
A plurality of the first lock pieces arranged at equal intervals, the first lock member formed integrally with the fixed portion;
A plurality of second lock pieces arranged at equal intervals, and a second lock member formed integrally with the fixed portion,
The first and second lock members are configured to be arranged alternately with the first and second lock pieces along the extending direction of the upper rail by being fixed to the upper rail. A vehicle seat slide device. In the vehicle seat slide device according to any one of claims 1 to 3,
A first lock piece having the insertion portion inserted between the engagement claws on the first engagement portion side;
A second lock piece having the insertion portion inserted between the engagement claws on the second engagement portion side,
The following formulas,
P = W1 + W2 + C
P = n × C
(However, P: formation pitch of the engaging claw, W1: insertion width of the insertion portion, W2: claw width of the engagement claw, C: adjustment pitch, n: total number of the insertion portions)
While satisfying
There is no phase difference between the first engagement portion and the second engagement portion, and the insertion portions of the first and second lock pieces are equally spaced along the extending direction of the lower rail. In the case where they are arranged alternately,
P × (n−1) = Z × n
Or the following formula:
P × (n + 1) = Z × n
(However, Z: pitch between the insertion portion of the first lock piece and the insertion portion of the second lock piece)
Configured to satisfy one of the following:
A vehicle seat slide device.