JPS6325977B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motor vehicle seat, and more particularly to a motor vehicle seat equipped with a seat sliding device.

Among automobiles, especially two-door cars, the seat cushions of the front seats can be moved forward.
It is desired to improve the ease of getting in and out of the vehicle for rear seat passengers.

By the way, the aforementioned front seats are usually equipped with a seat slide device so that the seat position can be adjusted in the front and back direction according to the physique of the person sitting on the seat. If the seat cushion is adjusted to the rear position and the seat cushion is moved forward, not only will it not be possible to fold it compactly towards the front of the passenger compartment, but the seat cushion will It protrudes upward, impairing forward visibility for rear seat occupants, and in the case of passenger-side seats, impairing side visibility for the driver. Therefore, prior to folding the seat cushion forward, it is necessary to operate the seat slide device to move the seat cushion to the frontmost position, resulting in a problem of poor operability.

In view of these problems, the present invention provides an automobile in which the seat cushion can be securely fixed to the floor side when the seat is in use, and the seat cushion can be moved forward by operating the seat slide device to move the seat to the frontmost side. The purpose is to provide a sheet for use.

In order to achieve the above object, in the present invention, the lower rail of the seat slide device is hinged to the front side of the seat support frame so that the seat cushion can be freely folded forward, and the seat cushion is straddled between the seat slide device and the seat support frame. The lower rail is supported by the seat support frame, and a lock mechanism is provided to release the lock when the seat moves to the frontmost side, so that when the seat moves to the frontmost side, the lock mechanism is automatically activated by the inertia of the seat itself. The seat cushion can be moved forward.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In Figures 1 to 3, 1 is the front, rear leg 1a, 1
a seat support frame with b fixed on the floor 2;
3 is a seat consisting of a seat cushion 4 and a seat back 5 attached to the seat cushion 4 so as to be freely adjustable in angle by a known reclining device 6 having a reclining lever 24; the seat 3 is mounted on the seat support frame 1; The seat slide device 7 is arranged so that the front and rear positions can be freely adjusted.

The seat slide device 7 includes a lower rail 8 and an upper rail 9 that is slidably assembled to the lower rail 8. The upper rail 9 is fixed to the lower surface of the seat cushion 4, and the lower rail 8 has a bracket 10 fixed to its front end. The front end of the seat support frame 1 is hinged with a hinge pin 11 so as to be able to rotate forward from above the frame 1, thereby allowing the seat cushion 4 to be folded forward. Between the lower rail 8 and the upper rail 9, specifically, a bracket 12 fixed to the front end of the lower rail 8, and a lock release arm 19 of a lock mechanism, which will be described later, fixed to the middle part of the upper rail 9.
A return spring 13 is stretched between the lower rail 8 and the upper rail 9, and when the lower rail 8 and the upper rail 9 are unlocked by the adjuster pin (not shown) with the adjuster lever 23, the upper rail 9 is moved forward together with the seat 3 by the force of the return spring 13. It is designed to slide back to the side. A lock mechanism 14 is disposed astride between the seat slide device 7 and the seat support frame 1 to lock the lower rail 8 to the seat support frame 1 and release the lock when the seat is moved to the frontmost side. There is.

In this embodiment, this locking mechanism 14 is connected to a striker 15 protruding from the side of the seat support frame 1.
and a latch 16 which is rotatably attached to the lower rail 8 with a pin 17, and which is biased by a set spring 18 with rotational force in the direction of engagement with the striker 15 to engage and disengage the striker 15;
The latch 16 is fixed to the upper rail 9 and engaged with the upper end of the latch 16 when the seat 3 moves to the frontmost side, so that the latch 16 is rotated against the force of the set spring 18;
It consists of a latch 16 and a lock release arm 19 for releasing the engagement with the striker 15.

The fixing position of the lock release arm 19 is the latch in the adjustment slide range L where both the lower and upper rails 8 and 9 are locked by the adjuster lever 14 when the striker 15 and the latch 16 are engaged. 16 without interfering with the upper end, the upper rail 9 is moved to the range L by unlocking both the lower and upper rails 8, 9 by the adjuster lever 23.
The latch 16 engages with the upper end of the latch 16 in the process of moving to the frontmost side of the sheet, overstrokes forward by l dimension, and can be rotated to a position where the latch 16 and the striker 15 are disengaged, as shown by the chain line in FIG. It is set to . In the figure, 20 is a stopper for regulating the forward tilting position of the seat 3, 21 is a bumper rubber of the lower rail 8, and 22 is a stopper for regulating the rotation of the latch 16.

According to the above embodiment structure, when the reclining lever 24 of the reclining device 6 is operated to disengage the reclining device 6 and the seat bag 5 is folded forward onto the seat cushion 4, the adjustment lever 23 is operated. When the lower rail 8 and upper rail 9 are unlocked by operation, the upper rail 8 and the seat 3 are slid forward vigorously by the traction force of the return spring 13. Here, in the process of overstroke to the frontmost side of the seat by a predetermined amount l beyond the adjustment slide range L, the lock release arm 19 is released from the latch 1.
When the latch 16 is engaged with the upper end of the striker 6 and the latch 16 is rotated in the unlocking direction, the latch 16 and the striker 15 are disengaged, and the upper rail 9 is stopped by a stopper (not shown), the seat 3 is moved to the seat slide device. 7 and the hinge pin 11 due to its own inertia force.
It rotates forward using the fulcrum as a fulcrum, and automatically falls forward as shown in the third diagram.

In addition to the above-mentioned embodiments, the lock mechanism includes
The latch and the striker may be disengaged electromagnetically by electrically sensing the forwardmost movement of the seat cushion or upper rail. Further, the seat support frame may be foldable along with the rear leg from the front leg so that the seat cushion can be folded forward after the seat cushion is folded forward. Furthermore, a so-called walk-in mechanism in which the adjustment lever of the seat slide device is linked with another mechanism can also be applied.

Note that the present invention is applicable not only to the front seat of a two-door vehicle, but also to the second seat, rear seat, etc. of a van vehicle.

As described above, according to the present invention, the seat cushion can be reliably locked to the seat support frame under normal use, and the seat cushion can be returned to the frontmost position by operating the seat slide device. By doing so, the lock mechanism is automatically unlocked, and by stopping the seat at the frontmost position, the seat cushion can be moved forward by the inertia of the seat itself, further improving operability. In addition, since the seat cushion can be folded forward with the seat cushion in its forwardmost position, it has a great practical effect in that it does not worsen forward visibility or side visibility.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention, Figure 2 is a side view showing one embodiment of the present invention;
The figure is a perspective view showing the relationship between the seat slide device and the seat support frame, and FIG. 3 is a side view with the seat cushion tilted forward. 1... Seat support frame, 2... Floor, 3
... Seat, 4 ... Seat cushion, 7 ... Seat slide device, 8 ... Lower rail, 9 ... Upper rail, 14 ... Lock mechanism, 15 ... Striker, 16 ... Latch, 19 ... Lock release arm .

Claims (1)

[Scope of Claims] 1. A seat cushion is arranged on a seat support frame arranged on a floor so as to be able to adjust its longitudinal position via a seat slide device having a lower rail and an upper rail. The lower rail is hinged to the front end of the seat support frame to allow the seat cushion to be folded forward.
A locking mechanism for locking the lower rail to the seat supporting frame and releasing the lock when the seat is moved to the frontmost side is disposed astride between the seat sliding device and the seat supporting frame. sheet. 2. The locking mechanism includes a striker fixed to the side of the seat support frame, a latch attached to the lower rail that engages and disengages from the striker, and a latch that is fixed to the upper rail and engages with the latch when the seat moves to the frontmost side to connect the latch and the striker. 2. The automobile seat according to claim 1, further comprising a lock release arm for releasing the engagement of the seat.