JPH09150659A - Suspension device of seat for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operativity of body weight adjustment by a body weight adjustment mechanism in a suspension device with the body weight adjustment mechanism. SOLUTION: A body weight adjustment mechanism A is provided between a lower frame 12 on the side of a car floor and an upper frame 22 on the side of a seat, and the body weight adjustment mechanism A adjusts elasticity of a spring 30 consisting of a compression coil spring interposed between a movable ring 31 and the upper frame 22 or the lower frame 12 by revolving operational force of a lever 3A by inserting the movable ring 31 integrated with the rod type lever 3A into a fixed cylinder 32 free to revolve.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension device for a vehicle seat such as an automobile seat (seat) whose weight can be adjusted.

[0002]

2. Description of the Related Art Some conventional suspension devices are provided with a weight adjusting mechanism for always obtaining a constant seat height even when occupants having different weights are seated. In this body weight adjusting mechanism, for example, as disclosed in Japanese Utility Model Laid-Open No. 3-16467, the elasticity of a tension coil spring for urging an X-shaped link mechanism provided between an upper frame and a lower frame in a standing direction is adjusted. Alternatively, as disclosed in Japanese Utility Model Laid-Open No. 4-132831, there is one that adjusts the elastic force of a compression coil spring interposed between the upper frame and the lower frame.

[0003]

By adjusting the elastic forces of the tension coil spring and the compression coil spring as described above, the height of the seat and the suspension property can be adjusted according to the weight of the occupant. This is performed by rotating the operation handle.

Therefore, when adjusting the weight, there is a problem that it takes a long time to adjust the weight, the adjustment cannot be carried out quickly, and the operator is fatigued by the turning operation of the operating handle. Therefore, an object of the present invention is to make it possible to easily and quickly adjust the weight of a suspension device.

[0005]

In order to achieve the above object, a vehicle seat suspension device according to the present invention comprises a vehicle floor side lower frame and a seat side upper frame which are vertically rocked by a parallel link mechanism. In a suspension device for a vehicle seat that movably supports, a weight adjusting mechanism is provided between the upper frame and a front portion of the lower frame, and the weight adjusting mechanism is fixed to either one of the upper frame and the lower frame. Fixed tube,
The fixed barrel includes a movable ring mounted rotatably in the circumferential direction of the fixed barrel, and a spring formed of a compression coil spring interposed between the movable ring and the upper frame or the lower frame. A stopper is provided, and a concave-convex engaging portion that abuts the stopper of the fixed cylinder is provided at the end edge of the movable ring, and the base of a rod-shaped lever is integrally fixed to the movable ring. .

Therefore, by rotating the rod-shaped operating lever in the left-right direction of the seat, the movable ring moves in the vertical direction with respect to the fixed cylinder, and the elastic force of the springs arranged in the vertical direction can be adjusted weakly.

[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. 1 to 3 show a suspension device with a weight adjusting mechanism according to the present invention, in which (10) and (11) are lower frames fixed to slide rails for adjusting the front-rear position of a vehicle floor or a seat fixed to the vehicle floor. , (20) and (21) are lower frames (10) and (11)
The upper frame is supported by the parallel link mechanism so as to be swingable in the vertical direction, and the seat is mounted on the upper frame (20) (21).

The lower frame (1
The front side of 0) and (11) is connected by a connecting rod (12), and the rear side is connected by a connecting rod (13). Further, the front portions of the left and right upper frames (20) (21) are integrally connected by a supporting rod (22). A weight adjusting mechanism (A) is provided between the supporting rod (22) and the connecting rod (12).

The weight adjusting mechanism (A) is composed of a lower frame (1
Fixed cylinder (3) fixed to the connecting rod (12) of (0) and (11)
2), a movable ring (31) mounted on the fixed cylinder (32) so as to be rotatable in the circumferential direction of the fixed cylinder (32), and a support for the movable ring (31) and the upper frames (20) (21). And a spring (30) which is a compression coil spring interposed between the rod (22) and the rod (22).

A connecting rod (1) is attached to the outer peripheral surface of the fixed barrel (32).
It is fixed to 2) upright and a stopper (32A) is integrally fastened as shown in FIGS. Movable ring (3
1) is rotatably inserted into a fixed cylinder (32), and a flange portion that supports the lower end of the spring (30) is integrally formed at the upper end edge thereof.

Further, the lower end edge of the movable ring (31) is formed in an uneven shape in the vertical direction, and the stopper (32) is formed on the lower end edge.
The movable ring (31) is positioned in the vertical position by hitting A). In FIGS. 4 and 5, the first engaging portion (31B) having a deep concave portion is for an occupant having a heavy weight, and the second engaging portion (31A) having a shallow concave portion is for an occupant having a light weight.

Since the base portion of the rod-shaped lever (3A) is integrally fixed to the movable ring (31) by welding, the movable ring is pushed and pulled in the left-right direction. Since the (31) rotates, the fixed tube (3
2) the stopper (32A) provided on the first engaging portion (31
The position of the movable ring (31) with respect to the fixed cylinder (32) is vertically displaced by engaging the second engagement portion (31A) from B) or vice versa. By this displacement, the movable ring (31)
The spring (30) interposed between the upper frame (20) and the support rod (22) of the upper frame (21) moves in the vertical direction.

As the spring (30) moves in the vertical direction, the height of the front side of the upper frames (20) and (21) is adjusted up and down, and a certain suspension characteristic is obtained according to occupants having different weights. The height of the seat can be constantly supported.

In order to prevent the spring (30) from falling off the supporting rod (22) of the upper frames (20) and (21), the support cylinder into which the upper end of the spring (30) is inserted is supported by the supporting rod (2).
It is projected downward in 2).

The parallel link mechanism for supporting the upper frames (20) and (21) on the lower frames (10) and (11) so as to be vertically swingable includes the upper frames (20) (2).
1), between the front and rear of the lower frame (10) (11),
The rear frame of the front link (41) is composed of a link mounted so as to be able to rise and fall forward, and a telescopic rod of the shock absorber (43) is mounted above the pivotal part of the rear link (42) with respect to the lower frame (11). (11)
The base portion of the shock absorber (43) is axially attached to the extension portion (41A) below the pivotal attachment portion.

Therefore, this shock absorber (43)
Absorbs the load applied to the rear side of the upper frame (21). Therefore, the upper frame (20) (2
By providing the spring (30) on the front side of 1) and the shock absorber (43) on the rear side, the suspension performance of the entire seat is improved. In FIG. 2, reference numeral (44) in the figure is a link that constitutes a parallel link mechanism.

The upper frames (20) (21)
The load applied to the connecting rod (not shown) that integrally connects the left and right rear links, and the rotating shaft (not shown) that is rotatably mounted between the lower frames (10) and (11) by connecting the connecting rod with the link. It may be absorbed by a vibration absorbing device composed of a rotary damper (not shown) provided on the lower frames (10) and (11) connected to the ends of the rotary shaft.

FIG. 4 shows a state in which the weight adjusting mechanism (A) is adjusted by operating the lever (3A) for an occupant having a light weight, and the stopper (32A) of the fixed cylinder (31) has a movable ring (31). Engaging the first engaging portion (31B) of the movable ring (3
1) is a support rod (2) of the upper frame (20) (21)
2) It is rising to the side.

FIG. 5 shows a lever (3A) for a heavy occupant.
Shows the state adjusted by the operation of the stopper (32A)
Is engaged with the second engaging portion (31A) of the movable ring (31), whereby the elastic force of the spring (30) is strongly adjusted.

[0020]

According to the present invention, the elastic force of the spring for urging the upper frame upward is obtained by pushing and pulling the lever integrally provided on the movable ring in the left-right direction, so that the suspension property corresponding to the weight of the occupant can be obtained. Can be obtained. Therefore, the operation for adjusting the weight can be performed quickly and easily, the operability can be improved, and the structure is simple, so that the trouble is unlikely to occur and the weight can be provided at a low cost.

[Brief description of the drawings]

FIG. 1 is a perspective view of the device of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a partial enlarged cross-sectional view of a weight adjustment mechanism.

FIG. 5 shows a state in which body weight is adjusted in FIG.

[Explanation of symbols]

 A Weight adjustment mechanism 10 Lower frame 11 Lower frame 20 Upper frame 21 Upper frame 30 Spring 31 Movable ring 3A Lever 32 Fixed cylinder 32A Stopper

Claims (2)

[Claims] 1. A suspension device for a vehicle seat in which a seat side upper frame is swingably supported in a vertical direction on a vehicle floor side lower frame by a parallel link mechanism, wherein the upper frame and a front portion of the lower frame are provided. Between,
A weight adjusting mechanism is provided, and the weight adjusting mechanism includes a fixed cylinder fixed to either the upper frame or the lower frame, a movable ring mounted on the fixed cylinder so as to be rotatable in the circumferential direction of the fixed cylinder, and the movable ring. And a spring composed of a compression coil spring interposed between the upper frame and the lower frame, the stopper is provided on the fixed cylinder, and the movable ring is provided with an uneven engaging portion that abuts the stopper of the fixed cylinder. And a suspension device for a vehicle seat, in which a rod-shaped lever base is integrally fixed to a movable ring. 2. Each of the links constituting the parallel link mechanism is pivotally attached to an upper frame and a lower frame so as to be capable of undulating forward, and a shock which absorbs a load applied to a rear side of the upper frame is attached to a rear side link. 2. The vehicle seat suspension device according to claim 1, further comprising an absorber.