JPH09150657A - Lock structure of seat cushion for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent the unexpected jumping of a seat cushion by locking the striker of the seat cushion by a lock plate energized in a downward turning direction by a reverse turn spring, in a device in which the posture of the seat cushion can be changed. SOLUTION: A seat cushion 1 is composed by pivoting its front part by a hinge part 3 and can be turned forward/backward to a sit position and jump up position. When such seat cushion 1 is backward turned from the jump up position to the sit position, the striker 11 of the seat cushion 1 is engaged with a folk part 13a by a reverse turn spring 17 and downward turned by interlocking the lock plate 13 with the striker 11. In a downward turn position, the seat cushion 1 is locked to a sit position by bonding a center line (a) by the reverse turn spring 17 and locking the striker 11 by the lock plate 13. Thereby, it is surely prevented that the seat cushion 1 of the sit position is jumped up unexpectedly by an impact.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat cushion locking structure and, more particularly, to a structure which can reliably prevent a seat cushion from jumping up due to an impact or the like.

[0002]

2. Description of the Related Art In a vehicle seat cushion, for example, a rear seat cushion, as shown in FIG. 4, a front portion of a seat cushion 1 is pivotally attached to a vehicle body 2 by a hinge portion 3 to rotate the seat cushion 1 backward. Sitting position [Fig. 4
(A)] and a flip-up position for forward rotation [Fig. 4 (B)] are proposed that can be rotated forward and backward. At the flip-up position of the seat cushion 1, the seat back 4 can be tilted forward. In the seat cushion 1 as described above,
There is a risk that the seat cushion 1 may unexpectedly jump up due to vibrations when the vehicle is running or shocks due to sudden stops, which may hit an occupant or a loaded item.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle seat cushion lock structure which has a simple structure and can reliably prevent the seat cushion from jumping up due to an impact or the like.

[0004]

In order to solve the above problems, according to the present invention, a front portion of a seat cushion is pivotally attached to a vehicle body so that the seat cushion is in a seating position for rearward rotation and a flip-up position for forward rotation. In the one that can be rotated back and forth, and while the striker is fixed to the rear part of the seat cushion,
When the striker of the seat cushion, which rotates rearward, engages the fork from above on the bracket of the vehicle body facing the striker, the striker is rotated downward to lock the seat cushion in the seated position and manually operate the knob. The lock plate is pivotally attached to the seat cushion so that the striker can be detached from the fork when it is rotated upward and the seat cushion can be rotated forward. With an intermediate position from the upper turning position as a boundary,
(EN) A lock structure for an automobile seat cushion, which is provided with reversing springs for urging respectively in a downward rotation direction and an upward rotation direction.

According to the present invention, when the seat cushion is pivoted rearward from the flip-up position to the seated position, the striker of the seat cushion is engaged with the fork portion of the lock plate biased to the upper pivot position by the reversing spring. Accordingly, the lock plate is rotated downward, and at the downward rotation position, the seat cushion is locked at the seating position by the lock plate biased in the downward rotation direction by the reversing spring. Next, when it is desired to rotate the seat cushion forward to the flip-up position, the knob of the lock plate is manually operated to rotate the lock plate upward, and the lock plate is biased to the upward rotation position by the reversing spring. Since the seat cushion is held in the open state, the striker of the seat cushion can be detached from the fork portion and the seat cushion can be rotated forward to the flip-up position.

As described above, the lock plate and the reversing spring can surely prevent the seat cushion from unexpectedly jumping up due to an impact or the like, and basically, the components are only the striker, the lock plate, and the reversing spring. From
The structure is simple and the parts cost and assembly cost are low.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 3, on the seat mounting panel 5 which is raised one step higher than the floor panel of the vehicle body, the front portion of the seat cushion 6 is pivotally attached by the hinge portions 7 and 7 in the same manner as in the conventional case. It can be rotated back and forth between a seating position for rearward rotation and a flip-up position for forward rotation.

Further, as in the conventional case, the lower portion of the seat back 9 is pivotally attached by the hinge portions 10 to the seat back mounting panel 8 which is further raised from the panel 5, and the seat back 9 is pivoted rearward. It is rotatable back and forth between an upright position and a forward tilted position.

As shown in FIGS. 1 and 2, the reverse U-shaped striker 1 is provided on the lower surface of the rear portion of the seat cushion 6.
The upper end of 1 is fixed. A rectangular bracket 12 is fixed to the upper surface of the panel 5 facing the striker 11, and the fork portion 1 having a bifurcated shape is attached to the bracket 12.
An intermediate portion of a lock plate 13 having 3a and an arm portion 13b is pivotally attached by a center pin 14 so as to be vertically rotatable.

When the striker 11 of the seat cushion 6 that rotates rearward is engaged with the fork portion 13a from above, the lock plate 13 is rotated downward in conjunction with the striker 11 and the seat cushion 6 is rotated by the striker 11.
Lock in the sitting position.

At the lower rotation position of the lock plate 13, the knob 15 attached to the arm portion 13b rising upward is manually operated from the lower opening 9a of the seat back 9 and pushed backward (see the arrow P) to be locked. Plate 13
The striker 11 moves the fork part 1 when the
The seat cushion 6 can be removed from the seat 3a, and the seat cushion 6 can be rotated forward to the flip-up position.

On the front edge of the bracket 12, the front stopper portion 1 for locking the lock plate 13 at the front rotation position is provided.
2a is provided, and at the rear edge of the bracket 12, there is provided a rear stopper portion 12b that holds the lock plate 13 at the rear rotation position.

Further, at the upper edge of the bracket 12, a lock plate 13 overhangs and falls, and a spring hook portion 12c is provided on a center line a behind the center pin 14. In the fork portion 13a of the lock plate 13, the spring hooking pin 16 is provided on the center line b of the fork groove 13c in front of the center pin 14.
Is provided. Then, the spring hooking pin 16 of the lock plate 13 and the spring hooking portion 12c of the bracket 12 described above.
An inversion coil spring 17 is stretched between and. The reversing coil spring 17 reverses the biasing direction at an intermediate position (center line a) between the lower rotation position and the upper rotation position of the lock plate 13 to move the lock plate 13 upward and downward. Each of them is biased in the rotation direction.

With the above structure, when the seat cushion 6 is now pivoted rearward from the flipped-up position to the seated position, as shown in FIG.
As indicated by the chain double-dashed line, the striker 11 of the seat cushion 6 engages with the fork portion 13a of the lock plate 13 biased to the upper rotation position by the reversing spring 17, so that the lock plate 13 moves. The lock plate 1 is rotated downward in conjunction with the downward rotation, and in the downward rotation position, the reversing spring 17 biases the lock plate 1 in the downward rotation direction with the center line a as a boundary.
In 3 the striker 11 is locked and the seat cushion 6 is locked in the seated position.

Next, when it is desired to rotate the seat cushion 6 forward to the flip-up position, the knob 1 of the lock plate 13 is rotated.
When 5 is pushed backward P to rotate the lock plate 13 upward, the lock plate 13 is held by the reversing spring 17 in a state of being biased to the upward rotation position with the center line a as a boundary. The striker 11 of the seat cushion 6 can be detached from the fork portion 13a, and the seat cushion 6 can be rotated forward to the flip-up position.

As described above, the lock plate 13 and the reversing spring 17 can surely prevent the seat cushion 6 locked at the seating position from unexpectedly jumping up due to an impact or the like, and basically, as a component, Since only the striker 11, the lock plate 13, and the reversing spring 17 are used, the structure is simple and the component cost and the assembly cost are low.

At the position where the seat cushion 6 is flipped up, the arm portion 13b of the lock plate 13 is laterally oriented (see the chain double-dashed line in FIG. 2).
It is safe because the arm portion 13b does not project upward even if the arm is tilted forward.

[0018]

As is apparent from the above description, in the seat cushion locking structure of the present invention, the striker of the seat cushion is locked by the lock plate biased downward by the reversing spring, The seat cushion will now be locked in the seated position. Therefore, the lock plate and the reversing spring can surely prevent the seat cushion from unexpectedly jumping up due to an impact, etc., and basically the components are only the striker, the lock plate, and the reversing spring, so that the structure is simple. Therefore, the practical effect that the parts cost and the assembly cost are reduced is great.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a lock structure of the present invention.

FIG. 2 is a side view of a lock structure.

FIG. 3 is a perspective view of a seat.

4A and 4B are side views of a flip-up type seat cushion, respectively.

[Explanation of symbols]

 5 panel 6 seat cushion 7 hinge part 11 striker 12 bracket 13 lock plate 13a fork part 13b arm part 14 center pin 15 knob 17 reversing spring

Claims (1)

[Claims] 1. A seat cushion, wherein a front portion of the seat cushion is pivotally attached to a vehicle body and the seat cushion can be rotated back and forth between a seating position for rearward rotation and a flip-up position for forward rotation. While the striker is fixed, the striker of the seat cushion that rotates rearward is rotated downward when the striker of the seat cushion that rotates rearward is engaged with the bracket of the vehicle body facing the striker, and the striker is rotated downward to lock the seat cushion in the seated position. A lock plate is pivotally mounted on the seat cushion so that the striker can be detached from the fork part when the knob part is manually operated and rotated upward, and the seat cushion can be rotated forward to the flip-up position. Is provided with reversing springs for urging respectively in the lower rotation direction and the upper rotation direction with an intermediate position between the lower rotation position and the upper rotation position as a boundary. Lock structure of the seat cushion for an automobile to be.