JPH11208325A - Seat reclining device with walk-in mechanism - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To simplify and speed up the work of assembling a vehicle seat having a seat reclining device with a walk-in mechanism. A walk-in lever is formed by a main body and a swing lever. The swing lever 30 is connected to a cable 25 that is connected to a lock body of the seat slide mechanism.
When the seat back is moved forward, the walk-in lever 24 does not rotate, and the swing lever 30 engages with the long hole 37 formed in the main body 28 so that the lock of the seat slide mechanism is maintained without pulling the cable 25. Energizing pin 3
4 engages with the engaging portion 39 of the swing lever 30. After assembling the vehicle body, when the seat back is raised and the wire 41 is pulled in the direction of the arrow to forcibly rotate the swing lever 30, the urging pin 34 engages with the notch 33 and the swing lever 30 The body 28 is unrotatably integrated, and the cable 25 is pulled to return to the normal state of the walk-in mechanism in which the lock is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat reclining device with a walk-in mechanism, and particularly when a seat provided with the device is mounted on an automobile, there is no need for precise and fine adjustment of a lower rail of a seat slide mechanism. This makes it possible to assemble the vehicle body.

[0002]

2. Description of the Related Art In order to make it easier for a rear seat occupant in a vehicle to enter and exit a passenger compartment, a seat of this type automatically moves toward the front of the vehicle body when the front seat is tilted forward. It is configured so that
This was originally used in the front seats of a two-door car that does not have an entrance for the rear seats, but recently it may be used in one-box cars.

[0003] In this type of seat, upper rails are slidably engaged with a pair of left and right lower rails to be fixed to the vehicle body floor surface to form a seat slide mechanism, and a seat reclining device is mounted on each of these upper rails. The rear portion of the seat cushion is clamped and fixed by the pair of seat reclining devices, and the lower portion of the seat back is rotatably clamped and fixed.

[0006] The seat slide mechanism is shown in FIG.
As shown in FIG. 7, a plurality of engagement holes 10 are formed at equal intervals in the longitudinal direction on the inner side surface of the lower rail 1, and a lock body 6 which can be disengaged from the engagement hole 10 is provided on the upper rail 2. 13 is fixed by the bracket 3 so as to be able to advance and retreat by a horizontal rotation operation of the lever 11 provided with 13 or a pull operation of the cable 14. The lock body 6 is slidably inserted into holes provided in the cut-and-raised portion 4 and the end 5 of the bracket 3, and
Are always urged toward the engagement hole 10 with the spring 7 interposed therebetween. The lever 11 is rotatably supported by the bracket 3 with a pin 9 and has an end 12 bent at a right angle. A projection 8 is formed on the lock body 6 so that the end 12 can be abutted. Although not shown, a spring is stretched between the upper rail 3 and the lower rail 1, and when the lock body 6 comes out of the engagement hole 10, the upper rail 3 is automatically moved forward by the force of the spring. It is designed to be attracted.

The operation of the lock body 6 coming out of the engagement hole 10 is as follows.
The walk-in lever is linked to the forward movement of the seat back when the occupant operates the lever 11 in order to adjust the seat position, and when the occupant does not have the occupant. There are cases. The walk-in lever is rotatably supported by a center shaft of a seat reclining device, and is kicked and turned when the member fixed to the seat back is turned in the forward leaning direction. Is configured to pull.

[0006] When assembling a seat of this type to a vehicle body, it is common practice to carry the completed seat into the vehicle and fix the lower rail of the seat slide mechanism to the vehicle body floor. is there. In this case, it is difficult to carry the vehicle into the vehicle unless the seat back is moved forward, so that the walk-in mechanism is unlocked.

[0007]

However, if the assembling work is performed on the vehicle body in an unlocked state of the seat slide mechanism, that is, in an unstable state where the upper rail and the lower rail can slide with each other, the left and right lower rails are fixed. The position may be disturbed, and the position where the lock body engages with the engagement hole may be disturbed in the left and right seat slide mechanisms, resulting in only one of the left and right cantilever locks. Therefore, after fixing the lower rail to the vehicle body, fine adjustment is performed so that the left and right lock positions are the same. Therefore, the work of assembling the seat to the vehicle body requires skill and time, thus lowering the production efficiency.

Accordingly, the present invention provides a structure that can ensure the accuracy and speed of the work of assembling such a seat to a vehicle body.

[0009]

A seat reclining device with a walk-in mechanism according to the present invention includes a walk-in lever rotatably supported by a center shaft of a seat reclining device mounted on a seat slide mechanism. A walk-in mechanism configured to be kicked and rotated by an engaging member that rotates together with the seat back when the seat back is tilted forward, and to pull a cable connected to the walk-in lever to unlock the seat slide mechanism; In the seat reclining device, the walk-in lever is formed of a main body rotatably supported on a center shaft and a swing lever rotatably supported on the main body, and the cable is connected to the swing lever. The swing lever is connected when the seat back is tilted forward. While the lock of the seat slide mechanism is maintained without pulling the cable, the swing lever is forcibly rotated to a position where the cable is pulled and the unlocked state of the seat slide mechanism can be formed. And the swing lever can be fixed to the main body so as not to swing at the position.

Therefore, when assembling this device to the vehicle body, even if the seat back is tilted forward, the lower rails of the seat slide mechanism are kept locked in order to keep the left and right rails of the seat slide mechanism locked. If it is fixed, the lock bodies of the left and right seat slide mechanisms will be fixed in the state where they are engaged with the engagement holes at the same position on the left and right. Absent. Then, after this device is assembled to the vehicle body, the seat back is raised, the swing lever is forcibly rotated by external force and fixed to the main body so that it cannot be rotated, so that the cable is pulled and the seat slide mechanism is locked. Can be released to a normal state.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, the seat reclining mechanism is configured such that a tooth plate 22 is rotatably stacked via a center shaft 21 on a base plate 20 fixed to an upper rail (not shown),
A seat back is connected to the tooth plate 22 directly or via an arm. In the walk-in mechanism, one end of a cable 25 is connected to a walk-in lever 24 that is rotatably supported on the center shaft 21 outside the tooth plate 22, and the other end of the cable 25 is as shown in FIG. The upper rail 2 and the lower rail 1 are connected to a lock body 6 for engaging and disengaging.

Although the seat reclining mechanism is of a known so-called internal gear system, it may be of an external gear system. As shown in FIG. 2, the seat reclining mechanism has a substantially fan-shaped concave portion 50 having a predetermined radius centered on the center shaft 21 formed in the tooth plate 22 by embossing. A tooth member 53 having a tooth portion 52 engaged with and disengaged from the inner peripheral tooth portion 51 is provided on the operation lever 5 via a cam member 54.
5 guides the guide portions 59 and 60 of the base plate 20 toward the inner peripheral tooth portion 51 so as to advance and retreat. The cam member 54 is provided with a hole 35a provided in the operation lever 55.
The cam member 54 is press-fitted with an embossed protrusion 56 projecting from the cam member 54 so as to be rotatably connected integrally with the operation lever 55, and the cam member 54 is engaged with an arm portion 57 formed on the tooth member 53. It has an arm portion 58 that fits.

A spiral ammunition 26 is wound around a center shaft 21 protruding from the tooth plate 22, and the inner end of the spiral machine 26 projects to the center shaft 21 and the other end projects to the outer surface of the tooth plate 22. The tooth plate 22 is always urged in the forward tilting direction by being locked to the provided locking pin 27. When the operating lever 55 is rotated clockwise around the center shaft 21 against the force of the return spring 62, the cam member 54 is also rotated clockwise, and its head 6 is rotated.
1 is disengaged from the lower part of the tooth member 53, and the arm portion 58 contacts the arm portion 57 to slide the tooth member 53 in the direction of the center shaft 21 to release the meshing of the teeth 51, 52. Therefore, the tooth plate 22 rotates in the forward falling direction by the force of the bullet 26 as shown by the phantom line.

Therefore, when the seat back is pushed rearward to determine its inclination angle and the operation lever 55 is released, the operation lever 55 returns to the original position by the force of the return spring 62 and the cam member 54 moves counterclockwise. And the arm portion 58 is separated from the arm portion 57 of the tooth member 53, and the head 61 of the cam member 54 comes into contact with the lower side of the tooth member 53, whereby the teeth portions 52 and 51 mesh with each other. Lock state.

As shown in FIG. 1, the walk-in lever 24 includes a main body 28 and a swing lever 30 rotatably supported by the main body 28 via a shaft 29. A projection 31 with which the stop pin 27 contacts is formed, and the swing lever 3 is moved to a position having a predetermined angle from the projection 31.
0 is arranged. The swing lever 30 is connected to the cable 25
Has a hole through which a pin 32 for rotatably supporting one end of the shaft is inserted, and a notch 33 on a side opposed to the hole with the shaft 29 interposed therebetween. A biasing pin 34 engageable with the notch 33 is sandwiched by one end of a spring 35, and the other end is fixed to the walk-in lever 24.
The urging pin 34 is urged so that the urging pin 34 can always engage with the notch 33 by being engaged with and held by the locking portion 36 formed on the main body 28. The biasing pin 34 is guided by engaging with an elongated hole 37 formed in the main body 28.

Until the swinging lever 30 is forcibly rotated, the swinging lever 30 is maintained in a predetermined state with respect to the main body 28. An arc-shaped sliding contact portion 38 having a radius and an engaging portion 39 are formed on the other end side. The urging pin 34 presses against the engaging portion 39 to stop the rotation of the swing lever 30. A hole 40 is formed at an end of the swing lever 30, and one end of a wire 41 as an operation member is inserted into the hole 40. Pulling this wire 41 forces the swing lever 30
Is rotated, the notch 33 is engaged with the urging pin 34, and the swing lever 30 can be fixed at a predetermined angle with respect to the main body 28.

The operation of the seat reclining device with a walk-in mechanism having the above configuration will be described. When assembling to the vehicle body, the walk-in lever 24 is brought into contact with the locking pin 27 by moving the seat back forward. At this time, the swing lever 30 is lightly held at the position shown in FIG. 1 so that the lock body 6 of the seat slide mechanism enters the engagement hole 10 without pulling the cable 25. In this state, the left and right lower rails 1,
1 is fixed to the vehicle body floor. Therefore, the seat slide mechanism is fixed to the floor of the vehicle body with the positions of the right and left engagement holes 10 exactly the same, so that the right and left are not disturbed.

After the seat slide mechanism is fixed to the floor of the vehicle body, in a state where the seat back is raised rearward and is almost upright, the walk-in lever 24 keeps the same posture as shown in FIG. Then, when the wire 41 is pulled in the direction of the arrow as shown in FIG.
As shown in the figure, the swing lever 30 rotates counterclockwise about the shaft 29, and the urging pin 34 engages with the notch 33 to fix the swing lever 30 at a predetermined angle with respect to the main body 28. I do. As a result, when the seat back is moved forward as shown by a virtual line in FIG.
8 and the swing lever 30 rotate integrally, the cable 25 is pulled, the lock body 6 comes out of the engagement hole 10, and the lock of the seat slide mechanism is released. The wire 41 is removed after the swing lever 30 is rotated as described above, that is, after the assembly is completed.

Therefore, the structure on the upper rail 2 can be moved rearward along the lower rail 1, so that the operating lever 55 is operated to set the reclining mechanism to a desired angle, and the upper rail 2 2 is moved to a desired position, the lever 11 of the seat slide mechanism is operated, and the lock body 6 is engaged with the engagement hole 10 to perform a normal state in which locking can be performed. Thereafter, in order for the occupant of the rear seat to enter and exit, the operation lever 55 is turned to rotate the tooth member 53 through the cam 54.
When the tooth plate 22 is released from the base plate 20 and the tooth back 22 is released from the base plate 20, the seat back is tilted forward by the urging force of the elastic machine 26, and the locking pin 27 causes the projection 31 of the walk-in lever 24 to move. As a result, the walk-in lever 24 in which the main body 28 and the swing lever 30 are integrated rotates counterclockwise about the center shaft 21 to pull the cable 25. Therefore, the lock body 6 comes out from the engagement hole 10 of the lower rail 1 to make the upper rail 2 free from the lower rail 10 and is automatically drawn to the front side of the vehicle body by the force of a built-in spring.

[0020]

According to the present invention described above, in the seat reclining device with a walk-in mechanism, it is possible to form a state in which the seat slide mechanism is locked with the seat back tilted forward when assembled to the vehicle body. Since the normal state is restored after the assembly work is completed, the positions of the left and right lower rails in the seat slide mechanism are always fixed to the vehicle body in an appropriate engagement state with the upper rail by the lock body. The position of the seat does not become out of order, and therefore, imbalance between the left and right locks in the seat slide mechanism does not always occur. Therefore, work such as fine adjustment after assembly is not necessary, and the assembly efficiency can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a front view of a seat reclining device showing an embodiment of the present invention.

FIG. 2 is a front view of a reclining lock portion of the seat reclining device shown in FIG.

FIG. 3 is an enlarged side view of the seat reclining device shown in FIG. 1;

4 (A) to 4 (C) are explanatory views of the operation of the walk-in lever.

FIG. 5 is an operation explanatory view of the seat reclining device.

FIG. 6 is a perspective view of one side of a seat slide mechanism.

FIG. 7 is a sectional view taken along line XX of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 ... Base plate 21 ... Center shaft 22 ... Tooth plate 23 ... Seat back 24 ... Walk-in lever 25 ... Cable 26 ... Ammunition 27 ... Locking pin 28 ... Body 29 ... Shaft 30 ... Swing lever 31 ... Projection part 32 ... Shaft 33 ... Notch 34 ... Urging pin 35 ... Spring 36 ... Locking part 37 ... Long hole 38 ... Arc-shaped sliding contact part 39 ... Engagement part 41 ... Wire

Claims (4)

[Claims] A walk-in lever rotatably supported by a center shaft of a seat reclining device mounted on a seat slide mechanism is rotatably supported by an engaging member which rotates together with the seat back when the seat back is tilted forward. In the seat reclining device with the walk-in mechanism, which is kicked and turned and pulls a cable connected to the walk-in lever to unlock the seat slide mechanism, the walk-in lever can be turned around a center shaft. And a swing lever rotatably supported by the body, the cable being connected to the swing lever, and the swing lever being in a state where the seat back is tilted forward. Can form a state in which the lock of the seat slide mechanism is held without pulling the cable. On the other hand, the swing lever is forcibly rotated to a position where the cable is pulled and the unlocked state of the seat slide mechanism can be formed, and the swing lever is not allowed to swing to the main body at this position. A seat reclining device with a walk-in mechanism, which can be fixed. 2. The walk-in lever includes a main body, a swinging lever rotatably supported by the main body, and an arc-shaped sliding contact portion of a predetermined radius formed on the swinging lever about the axis thereof. And a notch portion and an engagement portion formed at both ends of the arc-shaped sliding contact portion, and a biasing member protruded from the main body so as to be brought into sliding contact with the arc-shaped sliding contact portion and engageable with the notch portion. A pin, which is engaged with the engaging portion at the time of assembling, and by rotating a swing lever after the assembling, the urging pin is engaged with the cutout portion so that the body is The seat reclining device with a walk-in mechanism according to claim 1, wherein the swing lever and the swing lever are integrated. 3. The spring according to claim 1, wherein the biasing pin is formed by fixing a pin for engaging a long hole formed in the main body to one end of the spring and fixing the other end of the spring to the main body. 3. The seat reclining device with a walk-in mechanism according to 2. 4. An operating member for rotating the swing lever is detachably connected to a vicinity of a connection portion of the swing lever with the cable. Reclining device with walk-in mechanism.