JPH09150660A - Suspension device of vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the assembly property of a suspension device by supporting an upper frame and lower frame by a parallel link mechanism and arranging the installation part of a connecting rod and shock absorber upward for a pivot part for the lower frame of the link positioned in these rear sides. SOLUTION: An upper frame 2 is installed swingably in a vertical direction on a lower frame consisting of right/left lower frame 10, 11 by a parallel link mechanism 3. This parallel link mechanism 3 provides nearly V letter shape links 30, 31 for pivoting an intermittent part turnably in the front/rear of the left side lower frame 10 and also nearly < shape link 32 is provided in front of the right side lower frame 11 and I letter shape link 33 is provided on its rear part. At this time, the rear ends 30C, 31C of the link 30, 31 are installed so as to become higher for the pivot part for the lower frame 10 and the space between both rear ends 30C, 31C is connected by a connecting rod 34 and a shock absorber 35 is interposed between the lower end 32C of the link and the intermediate part 33C of the link.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension device provided in a vehicle seat such as an automobile seat (seat) for absorbing vibration during traveling on a rough road or the like.

[0002]

2. Description of the Related Art In a conventional suspension device, a seat side upper frame is attached to a vehicle floor or a lower frame fixed to the vehicle floor so as to be vertically movable by a link mechanism such as an X-shaped link mechanism. Therefore, since the upper frame moves vertically with respect to the lower frame, a space is created between the lower frame and the upper frame, and the upper frame and the lower frame are separated from each other so that the space is not visible from the rear seat side. A shield member is provided between the rear ends.

[0003]

By the way, the shield member is erected on the upper plate vertically extending from the rear end of the upper frame and the rear end of the lower frame so that the shield member can move up and down as the upper frame moves up and down. And a lower plate that overlaps the upper plate. Therefore,
After assembling the suspension device, the upper plate and the lower plate had to be welded to the upper frame and the lower frame, which resulted in poor assembly of the suspension device.

Therefore, an object of the present invention is to eliminate the problem caused by the shielding member provided at the rear end portions of the lower frame and the upper frame.

[0005]

A suspension device for a vehicle seat according to the present invention for achieving the above object comprises a pair of left and right lower frames fixed to the vehicle floor side and a parallel link mechanism for the lower frames. A suspension device for a vehicle seat comprising a pair of left and right upper frames swingably supported in the vertical direction via a parallel link mechanism in which an intermediate portion is rotatable before and after one lower frame. Pivotally attached substantially V-shaped link A and link B
And a substantially C-shaped link C having an intermediate portion pivotally attached to the front portion of the other lower frame, and an I-shaped link D having a lower end portion pivotally attached to the rear portion of the other lower frame. B is connected at one end to the upper frame side and the other end is connected to each other by a connecting rod at a position higher than the pivotal attachment portion of the links A and B to the lower frame, and the link C is pivotally attached at the upper end to the upper frame, The lower end of the link C is arranged at a lower position than the pivotal part of the link C, the upper end of the link D is pivotally attached to the upper frame, and the shock absorber is connected to the lower end of the link C and the intermediate part of the link D. It is characterized by becoming.

Therefore, on the rear side of the upper frame and the lower frame, the connecting rod and the attachment portion of the shock absorber to the link B and the link D are located above the pivotal attachment portion of the link B and the link D to the lower frame. Therefore, there is no space below the rear portion of the upper frame that may damage the appearance.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described.
This will be described with reference to the drawings. FIG. 1 is an exploded view of a suspension device according to the present invention, in which (1) is a lower frame composed of a left lower frame (10) and a right lower frame (11). )
The left and right lower frames (10) and (11) are connected integrally by connecting rods (12) and (13) at the front and rear.
Are fixed on a slide rail for adjusting the front and rear of a vehicle floor or a seat provided on the vehicle floor.

In the figure, (2) shows an upper frame (2) which is vertically swingably attached to a lower frame (1) by a parallel link mechanism (3). This upper frame (2) is a left upper part. It is composed of a frame (2A) and a right upper frame (2B), and the left and right upper frames (2A) (2B) have a connecting rod (2C) on the front side.
Are connected together by

The left and right upper frames (2A) (2
B) is a vertically bent mounting portion (20) (21)
(22) and (23) are integrally formed on the front side and the rear side, and the respective link portions A (30) ... Constituting the parallel link mechanism (3) are connected to the mounting portions (20). Support pin (5
2) It is pivotally attached by ... In the figure (6
0) shows a seat belt anchor fastened to the rear part of the left upper frame (2A).

The parallel link mechanism (3) includes a substantially V-shaped link A (30) and a link B (31) which pivotally mount an intermediate portion in front of and behind the left lower frame (10), and a right lower portion. A substantially C-shaped link C (32) pivotally connecting the middle part to the front part of the frame (11) and the right lower frame (11)
It is composed of an I-shaped link D (33) having a lower end pivotally attached to the rear part.

In the figure, (30B) (31B) (32B) (3
3B) Left and right upper frames (2A) (2B)
A mounting hole for pivotally attaching the pivot pin (52) to the pivot pin (30A) (31A) (32A) (33A) on the left and right lower frames (10) (11). 5
In 1), mounting holes for pivotally attaching are shown respectively. The points where the links (30) are pivotally attached to the left and right lower frames (2A) and (2B) by the pivot pins (51) are referred to as pivot portions.

The rear end (30C) of the link A (30) and the rear end (31C) of the link B (31) are linked to the link A (30),
The link B (31) is attached to the upper frame (2) and the lower frame (1) so as to be higher than the pivotal attachment portion of the link B (31), and both of the front and rear links A (30) and B (31) are attached. A connecting rod (34) is connected between the rear ends (30C) and (31C).

The link C (32) has an upper end pivotally connected to the left upper frame (2B) as described above, and has a lower end linked to the link C (32).
(32) is arranged at a lower position with respect to the pivotal portion of the left lower frame (11).
(33) has an upper end pivotally connected to the left upper frame (2B) and a lower end pivotally connected to the left lower frame (11) as described above. Then, the lower end of the link C (32) (3
2C) and a middle part (33C) of the link C (33) are provided with a shock absorber (35).

The link A (30) and the link B (3
1), the link C (32), and the link D (33) are pivotally attached to the upper frame (2) and the lower frame (1) so that they can be undulated forward, and the link A (30) and the link C are linked.
(32), the link B (31) and the link D (33) are integrally connected by a connecting shaft (not shown).

In FIG. 1, reference numeral (40) in the drawing is a compression coil spring for urging the front portion of the upper frame (2) upward.
Reference numeral (41) denotes an adjusting cam that integrally adjusts the elasticity of the compression coil spring (40) with the operation handle (41A), and reference numeral (42) denotes a fixed cylinder that rotatably supports the adjusting cam (41).

FIG. 2 shows a suspension device according to the present invention, which is provided on the rear side of the lower frame (1) and the upper frame (2) between the upper frame (2) and the lower frame (1) as in the conventional product. There is no shielding member.

FIG. 3 shows a state in which the parallel link mechanism (3) is attached to the upper frame (2) and the lower frame (1). The upper frame (2) and the lower frame (1) are shown.
On the rear side, the link B (31) and the link D (33) between the connecting rod (34) and the shock absorber (35).
The attachment parts for the link B (31) and the link D (3
3) It is located above the pivotal connection to the lower frame (2).

The link A (30), the link B (31), the link C (32), and the link D (33) are rotated upright about a pivotal portion of the lower frame (2) as a center of rotation, and the upper frame ( 2) ascend, and the upper frames (2) descend as they fall forward. And
The vertical load applied to the upper frame (2) is applied to the shock absorber (35) and the compression coil spring (4).
0).

4 and 5 show the operating state of the parallel link mechanism (3). In the state of FIG. 4, when a seated person sits on the seat, the load causes the parallel link mechanism (3) to move to the state of FIG. become.

[0020]

According to the present invention, the upper frame and the lower frame are supported by the parallel link mechanism to form a parallel link mechanism, and the upper frame and the links B and D located on the rear side of the lower frame are connected to the lower frame. Since the connecting rod and the shock absorber mounting portion are arranged so as to be located above the pivotally connecting portion, a wide space portion is formed on the rear side of the upper frame with respect to the lower frame as in the conventional product. There is no fear. Therefore, unlike the conventional product, it is not necessary to provide a shielding member on the rear side of the upper frame and the lower frame, so that the assembling property of the suspension device is improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view.

FIG. 2 is a perspective view.

FIG. 3 is a perspective view of a main part.

FIG. 4 is an explanatory view showing the operation of the parallel link mechanism.

FIG. 5 is an explanatory diagram of a state in which a load is applied in FIG.

[Explanation of symbols]

 1 Lower Frame 2 Upper Frame 3 Parallel Link Mechanism 30 Link A 31 Link B 32 Link C 33 Link D 34 Connecting Rod 35 Shock Absorber

Claims (3)

[Claims] 1. A vehicle seat comprising a pair of left and right lower frames fixed to a vehicle floor side, and a pair of left and right upper frames swingably supported in the up and down direction via a parallel link mechanism. In the suspension device, the parallel link mechanism includes a substantially V-shaped link A and a link B in which an intermediate portion is pivotally attached to the front and rear of one lower frame, and an intermediate portion at a front portion of the other lower frame. And a I-shaped link D having a lower end pivotally attached to the rear portion of the other lower frame. Links A and B have one end on the upper frame side and the other end on the other end. The links A and B are connected to each other by a connecting rod at a high position with respect to the pivotal connection portion with respect to the lower frame, and the link C has its upper end pivotally attached to the upper frame and its lower end to the rod of the link C. Disposed at a lower position with respect to deposition part, the link D is pivoted to the upper end to the upper frame, the link C
A suspension device for a vehicle seat, characterized in that a shock absorber is connected to a lower end of the vehicle and an intermediate portion of the link D. 2. The suspension device for a vehicle seat according to claim 1, wherein the links A, B, C and D are attached to a lower frame and an upper frame so as to be capable of undulating forward. 3. The vehicle seat suspension device according to claim 1, wherein the link A and the link C, and the link B and the link D are integrally connected by a connecting shaft.