JP2003040009A - Vehicle seat with tip-up mechanism - Google Patents

Abstract

(57) [Summary] [Object] To improve the appearance quality of a vehicle seat with a tip-up mechanism, particularly in a tip-up state. [Structure] A cushion frame (1) provided in a seat cushion is pivotally attached to the inside of a base bracket (2) integral with a movable rail of a slide rail so as to be vertically rotatable. ), A tip-up mechanism including a link plate A (3), a link plate B (4), a latch plate (5), a lock plate (6) and the like is mounted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat provided with a tip-up mechanism.

[0002]

2. Description of the Related Art A conventional liya seat mounted on a so-called one-box car or the like has a tip-up mechanism that causes a rear portion of a seat cushion to jump up around a center of rotation and fold the seat cushion to stand up along a seat back. is there.

After the seat cushion is folded, the entire space inside the vehicle can be expanded by moving the entire seat forward with the slide rails, so that the load capacity of the luggage can be increased and the folded state can be maintained. By moving the seat rearward, there is an advantage that the seatable range in the front-rear direction of the front seat of the seat can be expanded.

[0004]

SUMMARY OF THE INVENTION In the above conventional products, for example, as disclosed in JP-A-3-235729, a tip-up mechanism is provided on the side of a movable rail that slides a seat in the front-rear direction. There is.

Therefore, when the seat cushion is flipped up (when the tip is raised), the tip-up mechanism is covered with a cover or the like so as not to be seen from the outside.

Therefore, in addition to requiring man-hours for the appearance treatment, since the tip-up mechanism is provided on the movable rail side, the leg portion equipped with the tip-up mechanism integrally with the movable rail becomes large and the appearance quality of the seat is impaired. There was a problem that was.

[0007] Therefore, the present invention has an object to solve the problems in the conventional products.

[0008]

To achieve the above object, a vehicle seat with a tip-up mechanism according to the present invention is fixed to a movable rail side of a pair of left and right slide rails and a seat cushion is provided on the front side. , A base bracket for mounting the seat back on the rear side, a cushion frame of a seat cushion that pivotally attaches the rear part to the pair of left and right base brackets in a vertically rotatable manner, and a cushion frame provided inside the cushion frame for the cushion frame. Link plate A having one end fixed to a fixed shaft rotatably pivotally mounted, a link plate B pivotally pivoting the link plate A and the base bracket, and a fixed shaft together with the link plate A. The latch plate integrally fixed to the cushion frame is swingably pivotally attached to the cushion frame. A lock plate which is urged by a spring in the engagement direction engaging the over bets, a structure having an operation lever for releasing the engagement state with respect to the lock plate latches plate attached to the lock plate.

With the above construction, the tip-up mechanism is mounted inside the cushion frame of the seat cushion, so that the tip-up mechanism is incorporated inside the seat cushion.

Further, the cushion frame is provided with a support portion for supporting the lower end of the link plate in a normal use state of the seat, so that the seat cushion can be used without providing a lock mechanism at the rotation center of the seat cushion. Sometimes the load applied to the seat cushion can be dispersed from the link plate A to the base bracket side, so that the load does not concentrate on the lock mechanism.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 5, a vehicle seat with a tip-up mechanism according to the present invention is slidably mounted on a pair of left and right elongated fixed rails (25) fixed to a vehicle floor. A base bracket (2) is integrally fixed to a movable rail (24A) slidably engaged with the base bracket (2).
Seat cushion (SC) and seat back (SB)
Is installed.

The seat cushion (SC) is jumped up by a tip-up mechanism (to be described later) about the pivot (26) on the base bracket (2) so that the front part is raised from a substantially horizontal state, as shown by a chain line. It is configured so that it can be folded upright.

The upright seat back (S
By sliding the base bracket (2) to the front end side of the fixed rail (25) with the seat cushion (SC) folded in B), a wide load carrier space is secured behind the seat, and the fixed rail is fixed. (25) By sliding to the rear end side, the space in front of the seat is enlarged, and the seat arranged in front of the seat can be moved backward.

In FIG. 5, (1) shows a cushion frame arranged inside the seat cushion (SC), (3) shows a link plate A, and (4) shows a link plate B, respectively. The plate A (3) and the link plate B (4) are arranged in the seat cushion (SC) except for a part, and the upper end of the link plate A (3) is rotatably attached to the cushion frame (1). It is fixed to the fixed shaft (50).

The seat back (SB) has a mounting piece (2
30) via a reclining device (not shown), and the mounting piece (230) is a base bracket (2).
(0) is integrally fastened to a fastening portion (23) provided at the rear portion.

In the figure, (20) is a cushion frame mounting portion of the base bracket (2), and (21) is a supporting portion provided on the front end side of the base bracket (2).
The bent portion (31) provided at the lower end of the link plate A (3) is supported by 1). In the figure, (63) indicates an unlocking operation lever of the tip-up mechanism.

The above tip-up mechanism is shown in FIGS.
It is configured as shown in.

In the figure, (1) is a cushion of a seat cushion frame (SC) in which the rear part is pivotally attached by pivots (26) (26A) inside the pair of left and right base brackets (1). The cushion frame (2) is a plate-shaped side frame part (1
0) (11) and this side frame part (10) (1
The front frame part (1) made of pipe connected to the front side of (1)
2) and a pipe-made rear frame part (1
3) and.

The above side frame parts (10) (11)
The link plates A (3) (3A) and the link plates B (4) (4A) are disposed inside the base plate, and one ends of the link plates B (4) (4A) have base brackets (2) (2).
A) is rotatably attached to the inside of A) with a rivet (41), and the other end is pivotally attached to a link plate A (3) (3A) with a rivet (42). Reference numerals (43) and (44) in the figure denote rivet insertion holes.

The link plates A (3) (3A) have the bent portions (31) (31A) at the lower ends thereof, and the fixed shaft (rotatably attached at the upper ends thereof to the side frame portions (10) (11)). A latch plate (5), which is welded to the fixed shaft (50), is engaged with a lock plate (6) provided on the side frame portion (10).

The latch plate (5) is engaged with the first latch (5A) with which the lock plate (6) is engaged during normal use of the seat cushion (SC), and the seat cushion (S).
The second latch (5) to be engaged when C) is chipped up
B) is provided on the periphery.

The fixed shaft (50) includes side frame portions (10) and (11) and side frame portions (1).
0) Brackets (7) fastened inside each of (11)
And is rotatably installed between and. In the figure (65)
(75) is an insertion hole of the fixed shaft (50), (67) (67)
Reference numerals (71) and (71) respectively denote fastening holes for fastening the bracket (7).

The lock plate (6) is swingably attached to the inner surface of the side frame portion (10) by a pin, and the tooth portion (6A) is the first latch of the latch plate (5) by the elasticity of the spring (60). (5A) or the second latch (5B) is urged to engage.

One end of a rod (61) is connected to the lock plate (6), and the other end of the rod (61) is turned by an operating force of an operating lever (63). Are connected.

Therefore, the operating lever (63) is moved to the spring (6
When the rotary operation is performed against the elastic force of (0), the rod (61) is pulled, and the lock plate (6) engaging with the latch plate (5) causes the first latch (5A) or the second latch (5).
It is configured such that the engagement state (locked state) is released by detaching from B).

The base brackets (2) and (2A) are integrally formed with a flat support part (21) at the lower end of the front part thereof toward the front to bend the link plates A (3) (3A). The parts (31) and (31A) are supported.

Further, the cushion frame mounting portion (2) in an upright shape is provided outside the base brackets (2) (2A).
0) is provided inside the cushion frame (2)
The side frame parts (10) and (11) are attached so as to be able to jump up. In the figure, (201) is an insertion hole of the pivot (26),
Reference numerals (202) denote fastening holes of the rivet (41).

A mounting piece (230) is attached to the fastening portion (23) provided on the rear portion of the base bracket (2) (2A).
Through holes (203) (203) for fastening are provided, the cushion frame mounting portion (20) is extended from the fastening portion (23) through the inclined portion (22), and the inclined portion ( 22), the rear side of the seat cushion is covered by the cushion frame mounting portion (20).

The cushion frame (2) is disposed inside the seat cushion (SC) and has a link plate A.
(3) The bent portions (31) and (31A) of (3A) are formed so as to be exposed to the outside, that is, the components of the tip-up mechanism are incorporated into the seat cushion (SC).

Next, the operation will be described. FIG. 3 shows a normal use state of the seat cushion (SC), in which the lock plate (6) is the first latch (5A) of the latch plate (5).
And the bent portion (31) of the link plate A (3) is supported on the support portion (21) of the base bracket (2).

Therefore, the load applied to the seat cushion (SC) can be dispersed from the link plate A (3) to the base bracket (2), and the first latch (5)
A), the load is not concentrated on the lock plate (6).

When the operating lever (63) is operated to release the engagement state of the lock plate (6) with respect to the latch plate (5), the seat cushion (SC) can jump up around the pivot (26) as a rotation center. It will be in a state.

When the seat cushion (SC) is jumped up as shown in FIG. 4, the lock plate (6) is engaged with the second latch (5B) of the latch plate (5) and locked,
The lifted state of the seat cushion (SC) is maintained.

Next, when the operation lever (63) is operated,
The seat cushion (SC) locked in the jumped-up state can be returned to the use state shown in FIG.

[0035]

According to the invention of the first aspect, since the tip-up mechanism can be incorporated in the seat cushion, the problems of the conventional product can be eliminated.

According to the second aspect of the present invention, since the load under load can be dispersed to the base bracket side by the link plate A, the load on the lock plate and the latch plate can be reduced.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a main part.

FIG. 2 is an exploded perspective view of a main part.

FIG. 3 is a partially cutaway side view of a main part of the seat cushion in a used state.

FIG. 4 is a partially cutaway side view of a main part in a state where the seat cushion is chipped up.

FIG. 5 is an explanatory view showing the movement of the seat cushion.

[Explanation of symbols]

1 cushion frame 2 base bracket 3 Link plate A 4 Link plate B 5 Latch plate 6 Lock plate SC seat cushion 63 Operation lever

Claims (2)

[Claims] 1. A pair of left and right slide rails, a base bracket which is fixed to the movable rail side to mount a seat cushion on the front side and a seat back on the rear side, and a rear portion which is vertically rotated on the pair of left and right base brackets. A cushion frame of a seat cushion that is freely pivotally attached, a link plate A having one end fixed to a fixed shaft provided inside the cushion frame and rotatably attached to the cushion frame, the link plate A and the A link plate B pivotally pivotally attaching a base bracket, a latch plate integrally fixed to a fixed shaft together with the link plate A, pivotally pivotally pivotally attached to the cushion frame and engaged with the latch plate. Locking plate biased by a spring in the engaging direction, and the locking plate A vehicle seat with a tip-up mechanism having an operating lever attached to the lock lever to release the engagement state of the lock plate with the latch plate. 2. The vehicle seat with a tip-up mechanism according to claim 1, wherein the cushion frame is provided with a support portion for supporting a lower end of the link plate in a normal use state of the seat.