JP2024023124A - vehicle seat - Google Patents

Abstract

An object of the present invention is to provide a vehicle seat including a support member in which the occurrence of deflection in a predetermined direction is suppressed. [Solution] A vehicle seat S includes a seat frame F serving as a skeleton, and a support member 25 that is attached to the seat frame F and supports a seated person, and the support member 25 is made of an elastic material that can be elastically deformed. It has a plurality of linear parts 30 forming a mesh-like support surface 25a, and the plurality of linear parts 30 include a first arc part 31 formed in an arc shape, and a first arc part 31 formed in an arc shape. It includes a second circular arc portion 32 that intersects with the portion 31 and is formed in an arc shape. [Selection diagram] Figure 3

Description

TECHNICAL FIELD The present invention relates to a vehicle seat, and particularly to a vehicle seat including a support member for supporting a seated person on a seat frame.

Patent Document 1 discloses a vehicle seat in which a seat frame (frame member in the document) includes a support member in which a supporting member (wire) is insert-molded in a plate-shaped resin member in order to support a seated person. has been done. Compared to a support member made of a metal plate, it can be provided with appropriate flexibility, and since the support member is reinforced with a construction wire or the like, it can be provided with appropriate rigidity.
Additionally, in recent years, with the electrification of vehicles, batteries are placed in the vehicle floor, which has created a need for vehicle seats to be even thinner and lighter in order to reduce vehicle height. Therefore, soft elastomer resins have come to be used to provide cushioning properties not only to pad members but also to support members.

Japanese Patent Application Publication No. 2018-161912

However, when the support member is made of a soft elastomer resin, the support member may bend in the direction of acceleration or deceleration, such as the front-rear direction of the vehicle seat, due to the acceleration or deceleration of the vehicle on which it is mounted. The challenge was to suppress deflection.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle seat including a support member that can suppress deflection in a predetermined direction.

According to the seat of the present invention, the seat includes a seat frame serving as a skeleton, and a support member attached to the seat frame to support a seated person, and the support member is made of an elastic material that can be elastically deformed. It has a plurality of linear parts forming a mesh-like support surface, and the plurality of linear parts include a first arc part formed in an arc shape, and a first arc part formed in an arc shape. This problem is solved by including second circular arc portions that intersect and are both formed in circular arc shapes.

By providing the first circular arc portion and the second circular arc portion formed in a circular arc shape, for example, it is possible to resist a load received from a direction opposite to the convex direction of the circular arc, and it is possible to suppress deflection of the support member. . Furthermore, by intersecting the first circular arc portion and the second circular arc portion, the vicinity of the intersection can resist loads received from multiple directions, and by extension, it is possible to suppress deflection in a predetermined direction. A vehicle seat can be provided that includes a support member.

Further, in the above configuration, the plurality of linear portions may have a linear portion that extends linearly in the front-rear direction or the up-down direction of the seat.
By having the linear portion extending in the longitudinal direction or the vertical direction of the vehicle seat, it is possible to reduce the elongation (deflection) of the seat in the longitudinal direction or the vertical direction when a seated person is seated.
That is, when the support member is provided on the seat cushion, stretching in the longitudinal direction of the vehicle seat is reduced, and when the support member is provided on the seat back, stretching in the vertical direction of the vehicle seat is reduced.

Moreover, in the above configuration, the straight line portion may intersect with the first circular arc portion.
By intersecting the linear portion of the linear portion with the first circular arc portion, the elongation (bending) of the support member can be more efficiently reduced when the seated person is seated.

Moreover, in the above configuration, the straight line portion may intersect with the second circular arc portion.
By intersecting the straight part of the linear part and the second circular arc part, it is possible to more efficiently reduce the elongation (bending) of the support member when the seated person is seated.

In the above configuration, the first center point of the arc forming the first arc portion and the second center point of the arc forming the second arc portion are located outside the area occupied by the support member. It's good if you do.
By arranging the first center point of the first circular arc portion and the second center point of the second circular arc portion outside the area of the support member, the curvature of the circular arc is increased compared to the case where they are placed within the area. That is, by forming the support member into an appropriate shape, such as a gentle fan-shaped arc, the deflection of the support member can be further suppressed.

Further, in the above configuration, the plurality of linear portions have a circular arc shape that intersects the first circular arc portion and has a third center point different from a second center point of the arc forming the second circular arc portion. The third circular arc portion is preferably formed to intersect the straight line portion.
By having the third circular arc portion having a third center point different from the second center point of the second circular arc portion, the number of directions in which the load can be resisted increases, making it possible to further suppress deflection. Furthermore, since the third arcuate portion intersects with the straight line portion, it is possible to more efficiently reduce the elongation (bending) of the support member when the seated person is seated.

Further, in the above configuration, the support member includes a pressure sensor that detects a seating situation of the seated person, and a horizontal wire extending in the width direction of the seat, and the horizontal wire is arranged near the pressure sensor. It would be good if it was done.
By arranging the horizontal wire near the pressure sensor, it is possible to prevent the support member near the pressure sensor from curving more than necessary and preventing the pressure sensor from operating normally when the seat is seated.

Further, in the above configuration, the support member preferably has a vertical wire that is perpendicular to the horizontal wire and extends in the front-rear direction or the up-down direction of the seat.
Since the support member has a vertical wire extending in the longitudinal direction or the vertical direction of the vehicle seat, it is possible to reduce the elongation (deflection) in the longitudinal direction or the vertical direction of the seat when a seated person is sitting on the seat.

Further, in the above configuration, the pressure sensor may be disposed near an intersection between the horizontal wire and the vertical wire.
By arranging the pressure sensor near the intersection of the horizontal wire and the vertical wire, expansion of the support member is suppressed, and malfunction of the pressure sensor when the user is seated can be reduced.

Further, in the above configuration, the support member includes a blower and a duct that sends air from the blower toward the seated person, and the support member includes a horizontal wire extending in the width direction of the seat, and a horizontal wire extending perpendicularly to the horizontal wire in the front-rear direction. Alternatively, it is preferable that the support member has a vertical wire extending in the vertical direction, and a through hole through which the duct is inserted is formed in the support member near an intersection of the horizontal wire and the vertical wire.
By forming a through hole in the support member through which the duct is inserted, the air outlet of the duct can be placed on the side of the seated person. Further, by forming the through hole near the intersection of the horizontal wire and the vertical wire, the periphery of the through hole can be reinforced.

According to the present invention, by providing the first circular arc portion and the second circular arc portion formed in a circular arc shape, it is possible to resist, for example, a load received from a direction opposite to the convex direction of the circular arc, and the bending of the support member can be suppressed. In addition, since the first circular arc portion and the second circular arc portion intersect, the vicinity of the intersection can withstand loads received from multiple directions, and by extension, support that can suppress deflection in a predetermined direction. A vehicle seat including the member can be provided.
Further, by having the straight portion extending in the seat front-rear direction or the up-down direction, it is possible to reduce elongation (deflection) in the seat front-rear direction or up-down direction when a seated person is seated. That is, when the support member is provided on the seat cushion, stretching in the longitudinal direction of the vehicle seat is reduced, and when the support member is provided on the seat back, stretching in the vertical direction of the vehicle seat is reduced.
Furthermore, since the linear portion of the linear portion intersects with the first circular arc portion, the elongation (bending) of the support member can be more efficiently reduced when the seated person is seated.
Further, since the linear portion of the linear portion intersects with the second circular arc portion, the elongation (bending) of the support member can be more efficiently reduced when the seated person is seated.
In addition, since the first center point of the first circular arc portion and the second center point of the second circular arc portion are arranged outside the area of the support member, the curvature of the circular arc is smaller than when they are arranged within the area. By making it larger, that is, by making it a gentle fan-shaped circular arc and giving it an appropriate shape, it is possible to further suppress the deflection of the support member.
Furthermore, by having the third circular arc portion having a second center point different from the second center point of the second circular arc portion, the number of directions that can resist the load increases, making it possible to further suppress deflection. . Furthermore, since the third arcuate portion intersects with the straight line portion, it is possible to more efficiently reduce the elongation (bending) of the support member when the seated person is seated.
Further, by arranging the horizontal wire near the pressure sensor, it is possible to prevent the support member near the pressure sensor from being curved more than necessary and preventing the pressure sensor from operating normally when the seat is seated.
Moreover, since the support member has a vertical wire extending in the front-rear direction or the up-down direction, it is possible to reduce the elongation (deflection) in the front-rear direction or the up-down direction of the seat when the seated person is sitting on the seat.
Moreover, by arranging the pressure sensor near the intersection of the horizontal wire and the vertical wire, the extension of the support member is suppressed, and malfunction of the pressure sensor when the user is seated can be reduced.
Furthermore, by forming a through hole in the support member through which the duct is inserted, the air outlet of the duct can be placed on the side of the seated person. Further, by forming the through hole near the intersection of the horizontal wire and the vertical wire, the periphery of the through hole can be reinforced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the appearance of a vehicle seat according to the present invention, viewed diagonally from the front. FIG. 2 is a perspective view showing a seat frame of a vehicle seat. It is a top view of the support member attached to a cushion frame. It is a top view which shows the linear part of a support member. It is an explanatory view showing the concept of a linear part. 4 is a cross-sectional view taken along line VI-VI in FIG. 3. FIG. 4 is a cross-sectional view taken along line VII-VII in FIG. 3. FIG. It is a figure which shows another example of the wire provided in a support member. It is a figure which shows another example of the wire provided in a support member.

Hereinafter, the configuration of a vehicle seat according to an embodiment of the present invention will be described with reference to the drawings. However, the embodiments described below are for facilitating understanding of the present invention, and are not intended to limit the present invention. That is, the present invention may be modified and improved without departing from its spirit, and it goes without saying that the present invention includes equivalents thereof.
Further, in the following description, the contents regarding the materials, shapes, and sizes of the parts constituting the vehicle seat are merely one specific example, and do not limit the present invention.

In addition, below, a vehicle seat mounted in a vehicle will be cited as an example of a vehicle seat, and an example of its configuration will be described.
In addition, in the following description, the "seat longitudinal direction" refers to the longitudinal direction of the vehicle seat, and is a direction that coincides with the traveling direction when the vehicle is traveling. Further, the "seat width direction" refers to the width direction of the vehicle seat, and is a direction that coincides with the left-right direction as seen from an occupant seated on the vehicle seat. Further, the "up-down direction" refers to the up-down direction of the vehicle seat, and is a direction that coincides with the vertical direction when the vehicle is traveling on a horizontal plane. In addition, simply "outside" refers to the side closest to the outside in the direction from the center of the vehicle seat to the outside, and "inside" refers to the side closest to the center in the direction from the outside to the center of the vehicle seat. It means the direction.

Note that the shape, position, posture, etc. of each part of the vehicle seat described below will be explained assuming that the vehicle seat is in the seated state, unless otherwise specified.

<Vehicle seat S>
The basic structure of a vehicle seat will be explained with reference to FIGS. 1 and 2. FIG. 1 is a perspective view of a vehicle seat S, and a part of the vehicle seat S in FIG. 1 is shown with a skin material T removed for convenience of illustration. FIG. 2 is a perspective view showing the seat frame F of the vehicle seat S.

The vehicle seat S is placed on the floor of a vehicle, and is a seat on which a vehicle occupant (hereinafter also referred to as a seated person) sits. In this embodiment, the vehicle seat S is used as a front seat corresponding to the front seat of a vehicle. However, the vehicle seat S is not limited to this, and the vehicle seat S can also be used as a rear seat, and can also be used as a second-row middle seat or a third-row seat in a vehicle with three rows of seats in the front and rear direction. It can also be used as a rear seat.

As shown in FIG. 1, the vehicle seat S includes a seat back 1 that supports the back of the seated person, a seat cushion 2 that supports the buttocks of the seated person, and a seat cushion 2 that supports the seated person's buttocks, and a seat cushion 2 that is arranged on the top of the seat back 1 and that supports the seated person's head. The main component is the supporting headrest 3. Note that the seat back 1, seat cushion 2, and headrest 3 may be collectively referred to as a seat body.
The seat back 1 is constructed by placing a pad material P on a back frame 10 serving as a skeleton, and covering the pad material P with a skin material T. Further, the seat cushion 2 is constructed by placing a pad material P on a cushion frame 20 serving as a skeleton, and covering the pad material P with a skin material T.
The headrest 3 is provided above the seat back 1, and is constructed by placing a pad material P on a headrest frame serving as a core material, and covering the pad material P with a skin material T.

The vehicle seat S includes a rail device 4 that supports the seat body so as to be movable in the seat front and rear directions with respect to the vehicle floor (see FIG. 2). The rail device 4 is a device for sliding the seat body along the front-rear direction, and has a known structure (the structure of a general rail device). The rail device 4 has a lower rail 4a fixed on the floor of the vehicle, and an upper rail 4b that is slidable relative to the lower rail 4a.

The vehicle seat S also includes a reclining device 5 that tilts the seat back 1 with respect to the seat cushion 2 (see FIG. 2). The reclining device 5 is provided between the seat back 1 and the seat cushion 2, and the inclination angle of the seat back 1 with respect to the seat cushion 2 can be adjusted by the reclining device 5.

<Seat frame F>
As shown in FIG. 2, a seat frame F is provided in the vehicle seat S. As shown in FIG. The seat frame F is a member that serves as the skeleton of the vehicle seat S, and is mainly composed of a back frame 10 that forms the skeleton of the seat back 1 and a cushion frame 20 that forms the skeleton of the seat cushion 2.

<Back frame 10>
As shown in FIG. 2, the back frame 10 is formed into a rectangular frame shape as a whole, and includes a pair of back side frames 11, 11 arranged on the left and right, an upper frame 12, and a lower frame 13. Equipped with. The upper frame 12 is disposed between the pair of backside frames 11, 11, and connects the upper ends of the pair of backside frames 11, 11. The lower frame 13 is arranged between the pair of backside frames 11, 11, and connects the lower ends of the pair of backside frames 11. Further, above the back frame 10, a connecting frame 14 is interposed between the left and right ends of the upper frame 12.

A pressure receiving member 16 for the bag is disposed below the connection frame 14. The pressure receiving member 16 is a support member that supports the back of the seated person. The pressure receiving member 16 is connected to the connection frame 14 via the wire member 15. The pressure receiving member 16 is a flexible plate member that supports the back of the seated person from behind. Although the pressure receiving member 16 is made of resin, the present invention is not limited thereto, and the pressure receiving member 16 may be made of metal.

The upper frame 12 is provided with a pillar support portion 17 through which a headrest stay of the headrest 3 is inserted. The pillar support portion 17 is formed as a high-strength metal member in order to maintain the holding strength of the headrest 3 and suppress rattling. Note that the pillar support portion 17 is not limited to metal, and may be made of resin.

The pair of back side frames 11, 11 are disposed on the left and right sides of the back frame 10, as described above, and are basically members having a left-right symmetrical structure. The pair of backside frames 11, 11 are members extending in the seat vertical direction, and the width of each of the pair of backside frames 11, 11 in the seat longitudinal direction increases from the upper side of the seat toward the lower side of the seat. It is formed.

<Cushion frame 20>
As shown in FIG. 2, the cushion frame 20 is formed into a rectangular frame shape when viewed from below, and a pair of cushion side frames 21, 21 are provided on the left and right sides. The pair of cushion side frames 21, 21 are members extending in the front-back direction of the seat, and are basically configured to be left-right symmetrical. The pair of cushion side frames 21, 21 are spaced apart from each other in the left-right direction to define the width of the cushion frame 20.

The cushion frame 20 also includes a pan frame 22 located at the front end of the cushion frame 20, a front connection frame 23 connected at the front of the pair of cushion side frames 21, 21, and a rear connection frame 24 connected at the rear end. and has. The front connection frame 23 and the rear connection frame 24 are constructed of round pipes.
Note that a blower 51 is provided below the pan frame 22, and it is possible to send air through the connected duct 52 to the air outlet 53 formed on the seating surface 2a of the seat cushion 2. There is.

<Support member 25>
The support member 25 is a member that supports a seated person, and is also called a pressure receiving member because it receives a load from the seated person. As shown in FIG. 2, the support member 25 is a plate-shaped member. Hooks 26 are provided at the front and rear ends of the support member 25. The hook 26 is formed in a substantially arc shape extending from the front end or the rear end and convex upward (see FIG. 7).
A hook 26 at the front end of the support member 25 is hooked to the front connection frame 23 , and a hook 26 at the rear end is hooked to the rear connection frame 24 . The support member 25 is made of a soft elastomer resin, and supports the seated person by receiving the load from below.

Conventionally, support members for supporting a seated person have been made of metal or hard resin. However, with the electrification of vehicles, seat heights have been reduced in order to mount batteries in the vehicle floor, and padding materials have started to be made thinner. Therefore, in order to provide cushioning properties to the support member that supports the seated person, it has come to be formed of a soft material.
On the other hand, if the support member is made of a soft material, there is a possibility that the support member will bend due to actions such as acceleration and deceleration of the vehicle body.

The support member 25 provided in the vehicle seat S of this embodiment is formed of a soft elastomer resin (elastic material) that can be elastically deformed. Further, as shown in FIG. 3, the support member 25 is composed of a plurality of linear portions 30 forming a mesh-like support surface 25a.

The plurality of linear parts 30 will be explained using FIG. 4. The plurality of linear parts 30 include a first circular arc part 31 formed in an arc shape (indicated by a two-dot chain line in FIG. 4), and a second circular arc part 31 that intersects with the first circular arc part 31 and is formed in a circular arc shape. 32 and a third arcuate portion 33 (indicated by a dashed line in FIG. 4). Further, the plurality of linear parts 30 include a straight part 35 (indicated by a dotted line in FIG. 4) extending in the front-rear direction, a right-hand diagonal part 36 and a left-hand diagonal part 37 (indicated by dotted lines in FIG. (indicated by a dashed line).
In other words, the first circular arc portion 31, the second circular arc portion 32, the third circular arc portion 33, the straight line portion 35, the right diagonal line portion 36, and the left diagonal line portion 37 are each composed of a plurality of linear portions 30, which intersect. By doing so, a mesh-like support surface 25a is formed.

<First arc portion 31>
The first circular arc portion 31 is arranged such that the convex direction of the formed circular arc faces forward. Due to the arch effect of the first circular arc portion 31, the support member 25 can resist the load (arrow H1 in FIG. 4) received from the front facing in the convex direction. Therefore, for example, when a load is applied from the front during acceleration of the vehicle, it is possible to suppress the support member 25 from bending in the front-rear direction.

The first center point 31a of the arc forming the first arc portion 31 is located outside the area occupied by the support member 25, as shown in FIG. The first center point 31a is located on the center line of the support member 25 in the front-rear direction, and the first circular arc portion 31 is formed by a plurality of linear portions 30 extending along an arc centered on the first center point 31a. configured.

<Second arc portion 32>
The second circular arc portion 32 is arranged such that the convex direction of the formed circular arc faces diagonally forward to the left. The support member 25 can withstand, for example, a load received diagonally from the left front (arrow H2 in FIG. 4) by the second circular arc portion 32. Therefore, it is possible to suppress the support member 25 from deflecting diagonally to the left.

As shown in FIG. 3, the second center point 32a of the arc forming the second arc portion 32 is located diagonally to the rear right outside the area of the support member 25. The second circular arc portion 32 is composed of a plurality of linear portions 30 extending along an arc centered on a second center point 32a, and has a plurality of intersections (for example, the first intersection 41) with the first circular arc portion 31. It intersects. In the vicinity of the intersection of the second circular arc portion 32 and the first circular arc portion 31, the support member 25 can resist the load with both the second circular arc portion 32 and the first circular arc portion 31, so that the support member 25 can resist deflection in multiple directions. It can be suppressed. Further, the second arc portion 32 is arranged so as to intersect with the straight portion 35 at a plurality of intersection points (for example, the second intersection point 42).

<Third arc portion 33>
The third arc portion 33 is arranged such that the convex direction of the arc formed faces diagonally forward to the right. The support member 25 can withstand a load (in the direction of arrow H3) received from the diagonally right front, for example, by the third circular arc portion 33. Therefore, it is possible to suppress the support member 25 from bending diagonally to the right.
Further, the third arc portion 33 is arranged symmetrically with the second arc portion 32 with respect to the longitudinal center line of the support member 25 as an axis. By arranging the second circular arc portion 32 and the third circular arc portion 33 bilaterally symmetrically, it is possible to suppress the support member 25 from bending in the diagonal left direction and the diagonal right direction.

As shown in FIG. 4, the third center point 33a of the arc forming the third arc portion 33 is located diagonally to the rear left outside the area of the support member 25. The third circular arc portion 33 is composed of a plurality of linear portions 30 extending along an arc centered on the third center point 33a, and has a plurality of intersections (for example, the third intersection 43) with the first circular arc portion 31. It intersects. In the vicinity of the intersection of the third circular arc portion 33 and the first circular arc portion 31, the support member 25 can resist the load with both the third circular arc portion 33 and the first circular arc portion 31, so that the support member 25 can resist deflection in multiple directions. It can be suppressed. Further, the third arc portion 33 is arranged so as to intersect with the straight portion 35 at a plurality of intersections (for example, the fourth intersection 44).

Note that, as described above, the first center point 31a to the third center point 33a of the arcs forming the first to third arc portions 31 to 33 are located outside the area occupied by the support member 25. . By arranging the first center point 31a to the third center point 33a outside the area, the curvature of the arc can be increased compared to the case where they are inside the area, that is, the arc can be made into a gentle sector-shaped arc. Thereby, it is possible to form an appropriate shape capable of resisting a load, for example, and it is possible to further suppress deflection of the support member 25.

<Straight section 35>
The linear portion 35 is a linear portion 30 that is arranged to extend linearly in the front-rear direction of the seat. By providing the linear portion 35 extending in the front-rear direction of the vehicle seat S, it is possible to reduce extension (bending) of the support member 25 in the front-rear direction when a seated person is seated.
As shown in FIG. 4, the straight portion 35 intersects with the first circular arc portion 31 at a plurality of intersections (for example, the fifth intersection 45).
Further, the straight portion 35 arranged on the right side of the center of the support member 25 intersects with the second circular arc portion 32 at a plurality of intersections (for example, the second intersection 42).
The straight line portion 35 arranged on the left side of the center intersects with the third circular arc portion 33 at a plurality of intersection points (for example, the fourth intersection point 44). By intersecting the linear portion 35 with the first to third arcuate portions 31 to 33, it is possible to more efficiently reduce the elongation (bending) of the support member 25 when the seated person is seated.

<Right side diagonal line part 36>
In front of the second circular arc portion 32, a right diagonal portion 36 is provided, which is a linear portion 30 arranged to extend obliquely with respect to the front-rear direction. By providing the right side diagonal line portion 36 extending from the diagonally left front to the right rear, it is possible to resist the load inputted from the left diagonally front to the right diagonally rear, thereby suppressing deflection.

<Left diagonal line part 37>
In front of the third circular arc portion 33, a left oblique line portion 37 is provided, which is a linear portion 30 arranged to extend obliquely with respect to the front-rear direction. By providing the left diagonal line portion 37 extending from the diagonally right front toward the left diagonally rear, it is possible to resist a load input from the right diagonally front toward the left diagonally rear, and to suppress deflection.

As described above, the support surface 25a of the support member 25 is composed of a plurality of linear portions 30 extending in an arc shape or in a straight line. By arranging the linear portions 30 in a mesh shape, it is possible to suppress deflection against loads applied from various directions, but the arrangement including the arcuate linear portions 30 also has the following effects. be.

When a seated person sits on the vehicle seat S, the seated person's buttocks come into contact with the cushion seat, and at this time, the buttocks are compressed and may feel numbness or pain. The cause of this numbness and pain is said to be a lack of oxygen due to a lack of blood flow, and this may be alleviated by making the contact easier for blood to flow. In this embodiment, an attempt is made to suppress the occurrence of numbness and pain when sitting by matching the linear portion 30 forming the support surface 25a of the support member 25 to the shape of muscles and the body.

For example, the first arcuate portion 31 is formed along the piriformis muscle of the seated person, which extends as shown by arrows A and B in FIG. 5 when seated. Further, the second circular arc portion 32 and the third circular arc portion 33 are formed along the gluteus maximus and medius muscles of the seated person, which extend as indicated by arrows C and D shown in FIG.
Further, the straight portion 35 is formed along the hamstrings of the seated person, which extend as indicated by arrows E and G shown in FIG.
In this way, by matching the mesh of the support member 25 to the shape of the muscle fibers of the seated person, numbness and pain during sitting can be reduced. In particular, as the pad material P becomes thinner, the influence of the support member 25 becomes greater, and this effect is also more pronounced.

<Pressure sensor 50>
The support member 25 is provided with a pressure sensor 50 that detects the seating situation of a seated person. As shown in FIG. 3, the pressure sensor 50 is disposed on the front side of the support member 25 at approximately the center in the left-right direction.
Further, the support member 25 is provided with a horizontal wire 27 arranged to extend in the seat width direction (left-right direction). As shown in FIG. 3, the horizontal wire 27 is placed near the pressure sensor 50. By arranging the horizontal wire 27 near the pressure sensor 50, it is possible to prevent the support member 25 from curving more than necessary when the passenger is seated, and to prevent the pressure sensor 50 from operating properly. Note that the horizontal wire 27 is provided embedded in the support member 25, as shown in FIG. Further, the horizontal wire 27 is provided inside the side portion of the support member 25, more specifically, inside the side wire 29. Note that the horizontal wire 27 may extend beyond the side portion of the support member 25 to the cushion side frames 21, 21, and may be connected to the cushion side frames 21, 21.

The support member 25 is provided with a central wire 28 (vertical wire) extending in the front-rear direction at the center in the left-right direction. The horizontal wires 27 and the central wires 28 are perpendicular to each other at the sixth intersection 46, thereby effectively reducing the stretching and bending of the support member 25 when the seated person is seated.
Furthermore, two pressure sensors 50 are disposed on the support member 25 near the sixth intersection 46 where the horizontal wire 27 and the central wire 28 intersect. By arranging the pressure sensor 50 at a position where the extension of the support member 25 is efficiently reduced by the horizontal wires 27 and the central wire 28, the occurrence of malfunction of the pressure sensor 50 can be reduced. Also, the central wire 28 may be placed between the two pressure sensors 50.

Note that the pressure sensor 50 may be placed on the horizontal wire 27 or the central wire 28. Alternatively, the horizontal wire 27 or the central wire 28 may be bent downward to form a recess, and the pressure sensor 50 may be placed in the recess.
The thickness Ta of the support member 25 is approximately 8 mm in the portion where the horizontal wire 27 or the central wire 28 is inserted, and approximately 6 mm in the other portion where no wire is inserted. Further, in the support member 25, the support member 25 may be locally thinned at a position where it is not necessary to provide rigidity, and may be formed to have a thickness of about 3 mm, for example.
Further, a buffer member (not shown) may be arranged below the support member 25 for heat protection.

<Blower 51 and duct 52>
As shown in FIG. 3, a blower 51 is provided on the lower surface of the seat cushion 2, and a duct 52 extending from the blower 51 can blow air toward the seated person. The blower 51 is provided on the lower surface of the pan frame 22, and the duct 52 extends from the blower 51 and is connected to a blower port 53 (see FIG. 1) provided on the seating surface 2a of the seat cushion 2.
A through hole 38 is formed in the support member 25 next to the pressure sensor 50, and by inserting the duct 52 into the through hole 38, the duct 52 can be connected to the air outlet 53 provided on the seating surface 2a. It is now possible. Note that the through holes 38 are formed on both the left and right sides of the pressure sensor 50, which allows the support member 25 to be attached to either the driver's seat or the passenger's seat. That is, even if the blower 51 is provided on either the left side or the right side of the pan frame 22, the duct 52 can be inserted into the through hole 38 on the adjacent side and connected to the air outlet 53. Further, in order to reinforce the periphery of the through hole 38, the through hole 38 is arranged near the sixth intersection 46 of the horizontal wire 27 and the central wire 28. In other words, the horizontal wire 27 and the central wire 28 are arranged around the through hole 38.

<Side wire 29>
As shown in FIG. 6, wing portions 39, 39 are provided on both sides of the support member 25 to suppress pad displacement. The wing portions 39, 39 are formed by raising the side portions of the support member 25. Further, below the wing portions 39, 39, side wires 29, 29 extending in the front and rear direction of the seat are provided to reinforce the support member 25 and prevent it from bending vertically.

The width W between the pair of side wires 29, 29 does not have to be constant; as shown in FIG. It may be formed like this.
Further, the shape of the side wires 29, 29 is not limited to this, and for example, like a pair of side wires 29A, 29A shown in FIG. , the width WA between the pair of side wires 29A, 29A may be narrowed.

Alternatively, as shown in FIG. 9, a pair of horizontal wires 27B, 27B extending in the seat width direction may be provided such that their ends engage with the cushion side frames 21, 21. Even in the case of the seat frame F in which the front connection frame 23 and the rear connection frame 24 are not provided, the support member 25 can be attached to the cushion frame 20.

Further, in the present embodiment, the support member 25 is engaged with the front connection frame 23 and the rear connection frame 24 that connect the cushion side frames 21, 21, but the front side of the support member 25 is attached to the pan frame 22. It's okay to be hit. When the support member 25 is to be engaged with the pan frame 22, a pipe-shaped portion may be added to the pan frame 22 so that the end portion of the support member 25 is engaged with the pan frame 22.
Further, the lower recess of the pan frame 22 (the surface to which the harness clip is attached) may be replaced by the support member 25. A wire may be extended from the front end of the support member 25 and attached in a hook shape. Further, the front end of the support member 25 may be attached in the shape of an S spring. A portion of the pan frame 22 may be raised and an engaging portion that engages with the raised portion may be provided. A barb may be formed on the engaging portion.

The present embodiment has been described above using the drawings. Note that the embodiments described above are merely examples for facilitating understanding of the present invention, and do not limit the present invention. That is, the shapes, dimensions, arrangement, etc. of the members described in this embodiment can be changed and improved without departing from the spirit of the present invention, and it goes without saying that the present invention includes equivalents thereof. be.
Moreover, although the support member 25 attached to the cushion frame 20 has been described as an example, the support member 25 may be attached to the back frame 10 of the seat back 1 so as to support the back. In that case, the straight portion 35 forming the support surface 25a is formed to extend in the vertical direction, that is, in the extending direction of the seat back 1. Further, a central wire 28 (vertical wire) passing through the center of the support member 25 is arranged to extend in the vertical direction.

S Vehicle seat F Seat frame T Outer material P Pad material 1 Seat back 2 Seat cushion 2a Seating surface 3 Headrest 4 Rail device 5 Reclining device 10 Back frame 11 Back side frame 12 Upper frame 13 Lower frame 14 Connection frame 15 Wire member 16 Pressure receiving member 17 Pillar support portion 20 Cushion frame 21 Cushion side frame 22 Pan frame 23 Front connection frame 24 Rear connection frame 25 Support member 25a Support surface 26 Hooks 27, 27B Horizontal wire 28 Center wire (vertical wire)
29 Side wire 30 Linear part 31 First arc part 31a First center point 32 Second arc part 32a Second center point 33 Third arc part 33a Third center point 35 Straight part 36 Right diagonal line part 37 Left diagonal line part 38 Through hole 39 Wing portion 41 First intersection 42 Second intersection 43 Third intersection 44 Fourth intersection 45 Fifth intersection 46 Sixth intersection 50 Pressure sensor 51 Air blower 52 Duct 53 Air outlet Ta Thickness

Claims (10)

The seat frame serves as the skeleton,
a support member attached to the seat frame and supporting a seated person;
The support member is formed of an elastic material that can be elastically deformed, and has a plurality of linear parts forming a mesh-like support surface,
The plurality of linear parts include a first arc part formed in an arc shape, and a second arc part intersecting the first arc part and formed in an arc shape. sheet. 2. The vehicle seat according to claim 1, wherein the plurality of linear portions include linear portions that extend linearly in the front-rear direction or the up-down direction of the seat. The vehicle seat according to claim 2, wherein the straight portion intersects with the first arc portion. The vehicle seat according to claim 3, wherein the straight portion intersects with the second arc portion. The first center point of the arc forming the first arc portion and the second center point of the arc forming the second arc portion are located outside the area occupied by the support member. The vehicle seat according to claim 1. The plurality of linear parts intersect the first circular arc part and have a third center point different from a second center point of the arc forming the second circular arc part, and a third circular arc formed in an arc shape. has a department;
The vehicle seat according to claim 2, wherein the third arc portion intersects with the straight portion. The support member includes a pressure sensor that detects the seating situation of the seated person, and a horizontal wire that extends in the width direction of the seat,
The vehicle seat according to claim 1, wherein the transverse wire is arranged near the pressure sensor. 8. The vehicle seat according to claim 7, wherein the support member has a vertical wire that is perpendicular to the horizontal wire and extends in the front-back direction or the vertical direction of the seat. 9. The vehicle seat according to claim 8, wherein the pressure sensor is disposed near an intersection of the horizontal wire and the vertical wire. comprising an air blower and a duct that sends air from the air blower to the seated person side,
The support member has a horizontal wire extending in the width direction of the seat, and a vertical wire that is perpendicular to the horizontal wire and extends in the front-rear direction or the up-down direction of the seat,
2. The vehicle seat according to claim 1, wherein the support member has a through hole formed in the vicinity of an intersection of the horizontal wire and the vertical wire, into which the duct is inserted.

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