JPH11129799A - Seat folding mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly fold a seat. SOLUTION: A center part of a lower side of a seat cushion 2 is turnably supported by an upper end of a pair of forward and rear fixed legs 6, 6 fixed to a footing 5, each end of a U-shaped movable leg 8 is turnably mounted on a lower edge part of the seat cushion 2, the movable leg 8 is guided by stretching a guide link 12 between a lower side 8A of the movable leg 8 and the footing 5, a fitting groove 11 to fit the lower side 8A of the movable leg 8 is provided in a lock bracket 10 erected from the footing 5, and a lock claw 13 to lock the lower side 8A of the movable leg 8 in a fitting condition is mounted on the lock bracket 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat folding mechanism applied to, for example, a spare seat of an automobile.

[0002]

2. Description of the Related Art FIGS. The spare seat (21) shown in the figure comprises a seat cushion (22) and a seat back (23) that can be folded on the seat cushion (22). )
The upper and lower ends of a pair of L-shaped fixed legs (25, 25) fixed to the front and rear are rotatably supported, and a U-shaped movable leg (26) is provided on the lower side edge of the seat cushion (22). Both ends of the movable leg (26) are rotatably mounted, and the lower side (26A) of the movable leg (26) is slidably fitted in a guide groove (28) of a leg guide (27) fixed on a foundation (24),
The leg guide (27) is provided with a lock claw (29) for locking the lower side (26A) when the lower side (26A) of the movable leg (26) is located at the deepest end of the guide groove (28). I have.

When the spare seat (21) having the above structure is used as shown in FIG. 5, the movable leg (26) is provided in the guide groove of the leg guide (27).
When the spare seat (21) is folded at the innermost end of (28) and locked by the lock claw (29), the seat back (23) is folded over the seat cushion (22). Then, the lock of the lock claw (29) of the leg guide (27) with respect to the lower side (26A) of the movable leg (26) is released, and as shown in FIG.
The lower side (26A) of the seat cushion (22) and the seat back (23) are integrated by sliding the lower side (26A) of the leg guide (27) in the guide groove (28) in the direction of arrow A. Then, as shown in FIG. 7, the folded seat cushion (22) and the seat back (23) are integrally rotated to make a vertical state. In this case, the lower side (26A) of the movable leg (26)
Slides in the direction of arrow B in the guide groove (28) of the leg guide (27) and returns to the innermost end of the guide groove (28). Then, at this position, the lower side (26A) of the movable leg (26) is locked by the lock claw (29).

To return from the folded state to the use state shown in FIG. 5, the lock is released again and the seat cushion is released.
The lower side (26A) of the movable leg (26) is slid in the directions indicated by arrows A and B in the guide groove (28) of the leg guide (27). Move.

[0005]

In the conventional spare seat (21), when the spare seat (21) is changed from the use state to the folded state, and from the folded state to the use state, the movable leg (26) is used. The lower side (26A) reciprocates in the guide groove (28) of the leg guide (27) substantially linearly in the directions indicated by arrows A and B. Therefore, the guide groove (2
8) The length of the movable leg (26) must secure the sliding stroke of the lower side (26A), so that the leg guide (27) travels to the side of the spare seat (21). Will be. In addition, the inside of the guide groove (28) of the leg guide (27) is moved to the lower side (2) of the movable leg (26).
6A) due to the sliding resistance of the seat cushion (22)
It is difficult to smoothly rotate the body and the seat back (23) integrally.

[0006]

According to the present invention, as a means for solving the above-mentioned conventional problems, a pair of front and rear fixed legs having a center portion of a lower surface of a seat cushion (2) fixed to a foundation (5, 5).
(6, 6) The upper end of the seat cushion (2) is rotatably supported, and both ends of a U-shaped movable leg (8) are rotatably attached to the lower side edge of the seat cushion (2). 8) Lower side (8A) and foundation
A guide link (12,12) is delivered between (5,5) and
The lock brackets (10, 10) erected from (5, 5) are provided with fitting grooves (11, 11) for fitting the lower sides (8A) of the movable legs (8),
The movable legs (8) and the lower side (8A) are attached to the lock brackets (10, 10).
The present invention provides a folding mechanism for a seat (1) provided with lock claws (13, 13) for locking the seat in a fitted state.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to an embodiment shown in FIGS. The seat (1) shown in the figure is a spare seat of an automobile, and comprises a seat cushion (2) and a seat back (3) that can be folded on the seat cushion (2), and a frame of the seat cushion (2). (2A) and the frame (3A) of the seat back (3) are connected by reclining devices (4, 4).

[0008] The central portion of the lower surface of the seat cushion (2)
A pair of front and rear L-shaped fixed legs (6, 6) fixed to a pair of front and rear foundations (5, 5) installed on the floor are rotatably supported at the upper ends via turning brackets (7, 7). U-shaped movable legs are provided on the lower side edge of the seat cushion (2).
Both ends of (8) are rotatably mounted via rotating brackets (9, 9).

At the end of the movable leg (8) of the base (5, 5), a lock bracket (10, 10) is erected, and the lock bracket (1) is provided.
(0, 10) has a fitting groove (1) for fitting the lower side (8A) of the movable leg (8).
1,11) and a lock bracket (10,1)
0) A pair of front and rear guide links (12, 12) are provided between the lower portion and the lower side (8A) of the movable leg (8). A lock claw (13, 13) for locking the lower side (8A) of the movable leg (8) at the innermost end of the fitting groove (11, 11) is rotatable on the lock bracket (10, 10). The lock claw (13, 13) is provided with a shaft (14) attached to the rotating shaft thereof, and a handle (14A) is provided at the front end of the shaft (14). Nails (13,13)
As shown in (1), it is urged by the spring (15) in the direction of the arrow D (locking direction).

In the spare seat (1) having the above structure,
In the use state shown in FIG. 1, the lower side (8A) of the movable leg (8) is the innermost end of the fitting groove (11) of the lock bracket (10) and the locking claw (13).
Locked by

In order to put the spare seat (1) in a folded state, the seat back (3) is folded on the seat cushion (2), and the locking claw (13) on the lower side (8A) of the movable leg (8) is folded. ) Is released via the shaft (14) (the shaft (14) is
4A) to rotate in the direction opposite to the arrow d in FIG. 2), FIG.
As shown in the figure, the lower side (8A) of the movable leg (8) is removed from the fitting groove (11) of the lock bracket (10), and the folded seat cushion (2) and the seat back (3) are integrated. Then, the seat cushion (2) and the seat back (3) are rotated integrally with each other to rotate the seat cushion (2) and the seat back (3) together as shown in FIG. To the vertical position. In this state, the lower side (8A) of the movable leg (8) is located at the deepest end of the fitting groove (11) of the lock bracket (10) and is locked by the lock claw (13).

In order to return from the folded state shown in FIG. 4 to the use state shown in FIG. 1, the lock by the lock claw 13 on the lower side 8A of the movable leg 8 is released by the shaft rod 14. When the seat cushion (2) and the seat back (3) are rotated in the direction of arrow G in FIG. 4, the lower side (8A) of the movable leg (8) is fitted into the fitting groove (11) of the lock bracket (10). ), And goes through the intermediate state shown in FIG. 3 to the use state shown in FIG.

When the spare seat (1) shifts from the used state to the folded state and from the folded state to the used state, the lower side (8A) of the movable leg (8) is shown by arrows d in FIG. In this manner, the lock bracket (10) escapes from the fitting groove (11) and fits into the fitting groove (11) in a circular arc about the rotation axis (12A) of the guide link (12).

[0014]

According to the present invention, since the movable leg of the seat is guided by the guide link and escapes from or engages with the fitting groove of the lock bracket, the movement of the movable leg becomes extremely smooth, and the seat is used. The seat can be smoothly changed from the folded state to the folded state, and the seat can be smoothly changed from the folded state to the use state. Also, there is no need to lengthen the fitting groove of the lock bracket, and the lock bracket does not travel to the side of the seat.

[Brief description of the drawings]

 1 to 4 show one embodiment of the present invention.

FIG. 1 is a perspective view illustrating a use state.

FIG. 2 is an inner view of a lock bracket.

FIG. 3 is a side view illustrating an intermediate state.

FIG. 4 is a side view for explaining a folded state. FIGS. 5 to 7 show a conventional example.

FIG. 5 is a perspective view illustrating a use state.

FIG. 6 is an explanatory side view of an intermediate state.

FIG. 7 is a side view illustrating a folded state.

[Explanation of symbols]

 1 Spare seat (seat) 2 Seat cushion 3 Seat back 5 Foundation 6 Fixed leg 8 Movable leg 8A Lower side 10 Lock bracket 11 Mating groove 12 Guide link 13 Lock claw

Claims (1)

[Claims] An upper end of a pair of front and rear fixed legs fixed to a center of a lower surface of a seat cushion on a foundation so as to be rotatable;
Both ends of a U-shaped movable leg are rotatably attached to the lower surface side edge of the seat cushion, and a guide link is inserted between the lower side of the movable leg and the foundation, and a lock is provided upright from the foundation. A bracket provided with a fitting groove for fitting a lower side of the movable leg, and a lock claw mounted on the lock bracket for locking the lower side of the movable leg in a fitted state;