JPH09254691A - Supporting structure of vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To forwardly incline a seat so as to improve a getting in/off feeling for handicapped persons, aged people, and so on, by supporting the seat by a pair of left and right approximately X-shaped link mechanisms, and setting the pivoting parts of the X-shaped links of these link mechanisms on the front side of the seat. SOLUTION: A pair of left and right links 1, 2 arranged toward the front/rear directions of a seat, is pivoted in approximately X shapes, and a link mechanism having a structure that the left and right links are integrally connected to each other by a connecting shaft 7 is provided in a pivoting part, then the link mechanism is arranged between an upper frame 4 and a lower frame 3 so as to support the seat. At this time, the whole length of the links 1, 2 have the same size, and a part connected by the connecting shaft 7 is set on the front side of the seat. Hereby, under standing condition, the whole length of rear sides of the links 1, 2 are longer than their front sides from an intersection, therefore the upper frame 4 becomes under a slant condition that the front part thereof is lowered and the rear part thereof is raised, thus balance can be kept so that an occupant can easily get out from the seat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support device for a vehicle seat, and more particularly to a vehicle seat intended to improve entry / exitability.

[0002]

2. Description of the Related Art A conventional vehicle seat is provided with a seat so that the entire seat gradually leans forward and the front side of the seat cushion leans lower than the rear side in order to improve the entry / exitability with respect to the seat. Some are supported on the vehicle floor side (for example, US Pat. No. 5,265,935). This is a structure in which a seat is supported by a link mechanism formed by combining a number of links having different total lengths.

[0003]

Therefore, the conventional product has a problem that the structure is very complicated and thus it is liable to fail and the productivity is poor. Therefore, an object of the present invention is to provide a seat supporting device having a simple structure and capable of tilting the entire seat forward when a passenger gets on or off.

[0004]

A vehicle seat supporting device according to the present invention for achieving the above object comprises a pair of left and right substantially X-shaped members arranged in the front-rear direction on the vehicle floor side. It is supported by a link mechanism, and the link mechanism is characterized by comprising a link A and a link B having the same length as the link A, and a pivotally connecting portion which is an intersection point with the link A and which is the front side of the seat. is there.

When the links A and B are operated in the upright direction, the seat cushion is inclined so that the front side is low and the rear side is high, and when the links A and B are operated in the up and down direction, the entire seat cushion becomes horizontal.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the state of the link mechanism when the occupant exits the seat as shown in FIG. The link mechanism pivotally mounts a pair of left and right links A (1) and B (2) arranged in the front-rear direction of the seat in a substantially X-shape, and a connecting shaft (7) is provided at the pivoting portion to connect the left and right sides. It is a structure that is integrally connected.

This link mechanism is a seat cushion (S
The seat is supported by being arranged between the upper frame (4) on the C side and the lower frame (3) on the vehicle floor side. In the figure, (42) is the frame (4) of the seat cushion (SC).
The mounting bracket which fastens 3) is shown.

The link A (1) and the link B (2) have the same overall length, and the lower end (12) of the link A (1) is on the front side of the lower frame (3) and the link B (2). The upper ends of the brackets) are pivotally attached to brackets provided on the front side of the upper frame (4).

The upper end (11) of the link A (1) has a U-shaped guide (4) provided on the rear side of the upper frame (4).
1) and the lower end (22) of the link B (2) is slidably fitted in the U-shaped guide (31) provided on the rear side of the lower frame (3) in the front-rear direction via rollers. Have been combined.

Then, the link A (1) and the link B (2)
As shown in the drawing, the pivotal connecting portion, that is, the connecting portion by the connecting shaft (7) is located on the front side of the seat. Therefore, the length from the intersection of the link A (1) and the link B (2) to the lower end (12) of the link A (1) and the upper end (21) of the link B (2) is from the intersection to the link A (1). The link A (1) and the link B are shortened with respect to the length from the upper end (11) to the lower end (22) of the link B (2).
(2) is combined.

The link mechanism includes a spring (6) for urging the link A (1) and the link B (2) in the upright direction,
The cylinder lock (5) is provided, and the link A (1) and the link B (2) are erected by the driving force of the cylinder lock (5) and the elasticity of the spring (6) as shown in FIGS. 1 and 3. Become.

In this standing state, the link A (1),
Since the total length of the link B (2) on the rear side is longer than the front side from the intersection, the upper frame (4) on the seat cushion (SC) side is inclined so that the front portion is low and the rear portion is high. Therefore, as shown in FIG. 3, the occupant is in a position in which he / she can easily get off the seat. In FIG. 3, (SB) in the figure shows a seat back, and (8) shows a slide adjuster that adjusts the front-back position of the seat by slidably fitting the lower frame (3) in the front-back direction.

2 and 4 show the use state of the seat, and the upper frame (4) becomes horizontal by lowering the link A (1) and the link B (2) so that the seat can be used normally. . At this time, the elasticity of the spring (6) provides suspension.

In the figure, the spring (6),
Although the cylinder lock (5) is used, a power drive mechanism by a motor may be provided instead of these, and by adopting such a drive mechanism, the seat rising and forward leaning motion can be accurately and quickly performed. It becomes possible to do it.

[0015]

According to the present invention, since the seat tilts forward, the occupant can easily get in and out of the seat, and people with disabilities, elderly people, etc. can easily sit on the seat and can easily stand up from the seat. And the forward tilting motion of the seat can be done in one motion,
Operability is also improved. Moreover, since the components of the link mechanism can use the components of the conventional vehicle seat lifter as they are, it is easy to manage the components. In addition, since the structure is simple, failure is unlikely to occur and productivity is improved.

[Brief description of drawings]

FIG. 1 is a side view showing a main part of the present invention.

FIG. 2 is a side view showing a state where links A and B are laid down from the state of FIG.

FIG. 3 is a side view showing a state when getting on and off the vehicle.

FIG. 4 is a side view showing a use state.

[Explanation of symbols]

 1 link A 2 link B SC seat cushion

Claims (3)

[Claims] 1. A seat is supported on a vehicle floor side by a pair of left and right substantially X-shaped link mechanisms arranged in the front-rear direction. The link mechanism is a link A and has the same length as the link A with respect to the link A. A support device for a vehicle seat, wherein a pivotally connecting portion which is an intersection is formed of a link B which is a front side of the seat. 2. The vehicle according to claim 1, wherein the links A and B have front ends pivotally attached to a seat or a vehicle floor side, and rear ends attached to the seat or a vehicle floor side so as to be slidable in the front-rear direction. Sheet support device. 3. The vehicle seat supporting device according to claim 1, wherein a spring and a cylinder lock for urging the links A and B in the upright direction are provided on the link A or the link B.