JPH0729005Y2 - Seat back Front-tilt type vehicle seat - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a vehicle seat, and more particularly to a seat cushion for which a front end of a base of a reclining device for tiltably supporting the seat back can be raised with respect to a seat cushion. At the same time, the rear end side is always hooked and locked by the locking means, and the locking state of this locking means is released, whereby the seat back is tilted and rotated through the base to tilt forward on the seat cushion. The present invention relates to an improvement of a vehicle seat for a front-back-tilt type vehicle seat.

[Conventional technology]

Generally, a vehicle seat is provided with a seat cushion and a seat back or the like which is erected upright by a reclining mechanism so as to be rotatable behind the seat cushion. Thus, the vehicle body is configured so that it can be slid and adjusted in the front-rear direction, and the seated state can be obtained according to the body shape and taste of the seated person.

By the way, in this type of vehicle seat, a structure as shown in FIG. 3 and FIG. To briefly explain this, reference numeral 1 in FIG. 3 is a vehicle seat including a seat cushion 2 (not shown in the figure) and a seat back 3 standing upright on the rear end side thereof, and the seat cushion 2 is well known. It is supported on an upper rail 5 that constitutes the front-rear slide mechanism 4. In addition, 6 is a lower rail arranged on the floor of the passenger compartment.

Reference numeral 10 denotes a reclining device that supports the seat back 3 so as to be tiltable with respect to the seat cushion 2, and as is well known, a base that interposes a lock mechanism (not shown) that can maintain a locked state at a desired tilt angle position. 11 and arm
It is composed of 12.

Here, the front end of the base 11 is pivotally supported by a pivot 13 with respect to the seat cushion 2, and when the base 11 is pivoted around the pivot 13, the seat back 3 is placed on the seat cushion 2. It is formed so that it can be laid down and tilted forward.

14 is the upper rail 5 (or the upper rail 5
Is an engaging pin projecting laterally from a bracket) and having a groove 14a having a small diameter part in the middle thereof. The base 11 has a lower edge on the rear end side thereof.
The movement in the plate thickness direction is restricted by engaging with the groove portion 14a composed of the small diameter portion.

Further, the base 11 is provided with respect to the groove portion 14a of the engaging pin 14.
The base 11 from the side opposite to the upper side of the groove portion 14a of the engaging pin 14 into which the bottom portion of the engaging pin 14 is inserted, that is, from below the groove portion 14a of the engaging pin 14.
Tip part of the hook 15 that is pivotally supported by a part of
The engagement of the engagement pin 14 with the base bottom portion by the front end claw portion 15a by the engagement of 15a is always locked and fixed to the upper rail 5 side which is a fixing member on the seat cushion 2 side.

The hook 15 described above is biased in the locking direction by a spring means (not shown), while the lock release wire 16 is pulled so that the locked state of the hook 15 is released. Has become
As a result, as described above, the seat back 3 can be tilted forward through the base 11.

[Problems to be solved by the device]

However, in the vehicle seat 1 of the above-described conventional seatback tilt-down type, the base 11 is hooked by the hook 15 so as to lock the seatback 3 tilted forward.
When the above is engaged with the groove portion 14a of the engagement pin 14 on the upper rail 5 side and engaged, the following problem occurs.

That is, in the above-described conventional structure, the bottom portion of the base 11 is fitted in and engaged with the groove portion 14a formed of the small diameter portion of the engaging pin 14, but rattling of the base 11 in the groove portion 14a is caused. It is unavoidable, and it cannot be said that a reliable locked state in the plate thickness direction of the base 11 can be obtained.

For this reason, it is considered that these dimensional relationships are strictly performed, or the locking by the hook 15 can be used to eliminate this, but if this is done, rattling will be eliminated, but hooking will not occur. This causes a problem such as a heavy operation force when the hook 15 is rotated in the releasing direction, and it is desired to take some measures to eliminate such a problem.

[Means for Solving the Problems]

In order to meet such demands, a seatback front-tilt type vehicle seat according to the present invention has a front end portion of a base which constitutes a reclining device for tiltably supporting the seatback at a rear end side of the seat cushion. Can be caused to pivot, and part of the base,
In a seat back front-tilt type vehicle seat, which is provided with locking means for normally locking the rear end side of the base to the seat cushion side, in the vertical wall of the upper rail on the side side of the seat cushion, the base is provided. A first locking pin having a groove portion having a small diameter portion for restraining the movement of the base in the plate thickness direction by locking the concave groove portion having an upper end arc shape formed in the middle portion of the bottom portion of A second locking pin for restraining the rotation of the base in the raising direction is provided on a vertical wall of the upper rail on the side of the seat cushion by means of a hook for hooking at the rear end of the base. Is characterized by.

[Action]

According to the present invention, the vertical wall of the upper rail on the side of the seat cushion is provided with the first locking pin having the groove portion having the small diameter portion for restraining the movement of the base in the plate thickness direction,
A second hooking pin for restraining the pivoting of the base in the raising direction is provided on the vertical wall of the upper rail on the side of the seat cushion by a hooking hook which is fixed to the rear end of the base. Therefore, the seat back, which is normally tiltably supported by the reclining device at the required seating position, is formed in the middle of the bottom of the base that is pivotally supported so that it can be raised against the seat cushion. The groove portion of the first locking pin can be locked in the groove portion formed of the small diameter portion, and the hook for pivotally supported at the rear end of the base can be locked in the second locking pin. The seat cushion side can be properly and securely locked without rattling, and when releasing the lock, the hook for hooking is removed to turn the base in the direction of turning. Then, This is what can give fallen before allowed to fall down the seat back to the seat cushion side.

〔Example〕

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

FIG. 1 and FIG. 2 show an embodiment of a seat back forward-tilting type vehicle seat according to the present invention. In these figures, the same or corresponding parts as those in FIG. Will be attached and detailed description thereof will be omitted.

Now, according to the present invention, the vehicle seat 1 as described above.
In a reclining device 10 for tiltably supporting a seat back 3, a front end of a reclining device 10 tiltably supported on a side portion of a seat cushion 2 is formed at a bottom portion of a base 11 pivotably supported. By locking the arc-shaped concave groove 11a, the base 11
Groove part 20a consisting of a small diameter part that restrains the movement of the plate in the plate thickness direction
And a second locking pin 21 for restraining the rotation of the base 11 in the raising direction by means of a hook 15 that is axially fixed to a part of the base 11. There is a feature in the place.

Further, according to such a configuration, the seat back 3 which is normally supported by the reclining device 10 so as to be tiltable at a required seating position is supported by the base 11 which is pivotally supported so as to be capable of being raised with respect to the seat cushion 2. The bottom portion on the rear end side can be locked to the first locking pin 20, and the hook 15 supported by the rear end portion of the base 11 can be locked to the second locking pin 21. It can be properly and reliably locked and fixed to the upper rail 5 side without rattling, and at the time of unlocking, the hook 11 for hooking is removed to rotate the base 11 in the direction in which the seat back is raised. 3 can be laid down on the side of the seat cushion 2 to make it fall forward.

Therefore, in such a vehicle seat 1 according to the present invention,
Despite the simple and inexpensive structure, the rattling in the plate thickness direction of the base 11 is formed by the groove portion including the small diameter portion of the first locking pin 20.
20a and the upper end arcuate concave groove portion 11a formed in the middle of the bottom portion of the base 11 to prevent the rattling of the base 11 in the raising direction.
It can be easily and surely prevented by locking to the locking pin 21, and not only the rattling problem as in the past can be solved, but also the locked state by the hook 15 for hooking as in the past can be solved. There is an advantage that the operation force when releasing and tilting the seat back 3 forward can be lightened.

The present invention is not limited to the structure of the above-described embodiment, and the shape, structure, etc. of each part of the seat back forward-tilt type vehicle seat 1
It is possible to freely modify and change as needed, and various modifications can be considered.

[Effect of device]

As described above, according to the seat back front-tilting type vehicle seat according to the present invention, the front end portion of the base that constitutes the reclining device that tiltably supports the seat back at the seat cushion rear end side includes the seat cushion. In a vehicle seat for a front-back-tilt-type vehicle, which is pivotally supported so that it can be raised with respect to the seat back, and in which a locking means for locking the rear end side of the base to the seat cushion side is always provided in a part of the base, The vertical wall of the upper rail on the side of the seat cushion is locked with a concave groove having an upper end arc shape formed in an intermediate portion of the bottom of the base to restrain the movement of the base in the plate thickness direction. A first locking pin having a groove formed of a small diameter portion is provided, and a hook for locking the shaft at the rear end of the base restrains rotation of the base in the raising direction. Since the second locking pin is provided on the vertical wall of the upper rail on the side of the seat cushion, the rattling in the plate thickness direction of the base is reduced despite the simple and inexpensive structure. The engagement of the groove formed of the small diameter part of the locking pin and the concave groove of the upper end arc shape formed in the middle part of the bottom of the base prevents the rattling in the raising direction of the base. By locking to the locking pin of 2, it can be easily and surely prevented, and not only the rattling problem as in the past can be solved, but also the locked state by the conventional hook can be released. There are various practical advantages such as a reduction in the operation force when the seat back is tilted forward.

[Brief description of drawings]

FIG. 1 is a schematic side view of a main part configuration showing an embodiment of a seat back forward-tilting type vehicle seat according to the present invention, and FIG. 2 is a schematic view showing characteristic first and second locking pins. FIG. 3 is a perspective view, FIG. 3 is a schematic side view showing a conventional example, and FIG. In the figure, 1 ... Seat back for vehicle with front tilt, 2 ...
… Seat cushion, 3 …… Seat back, 4 …… Back and forth slide mechanism, 5 …… Upper rail, 10 …… Recliner, 11 …… Base, 11a …… Concave groove, 12…
… Arms, 13… Axis, 15… Hooks for hooks, 16…
… Unlocking wire, 20 …… First locking pin, 20a…
… Groove part consisting of small diameter part, 21… Second locking pin.

Claims (1)

[Scope of utility model registration request] 1. A front end portion of a base that constitutes a reclining device that tiltably supports a seat back on a rear end side of a seat cushion, is pivotably supported to the seat cushion, and a part of the base is supported. In a seat back front-tilt type vehicle seat, which is provided with locking means for normally locking the rear end side of the base to the seat cushion side, in the vertical wall of the upper rail on the side side of the seat cushion, the base is provided. A first locking pin having a groove portion having a small diameter portion for restraining the movement of the base in the plate thickness direction by locking the concave groove portion having an upper end arc shape formed in the middle portion of the bottom portion of A second hooking pin for restraining the pivoting of the base in the raising direction is provided with a hook for locking the rear end of the base, and the upper hook is provided on the side of the seat cushion. Seat back before falling seat for a vehicle, characterized in that provided on the vertical wall of the Le.