JP2583093Y2 - Automotive seat suspension system - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension apparatus using an X-shaped link for a vehicle seat.

[0002]

2. Description of the Related Art FIGS. 4 to 6 show a part of a conventional suspension apparatus for an automobile seat.
(A) is a lower frame fixed to the vehicle floor (F) or a slide rail fixed to the vehicle floor (F), (b) is an upper frame fixed to the bottom left and right of the seat cushion (SC), and the lower frame (a) and the upper The frame (b) is connected by X-shaped links (10) (10) (20) (20), and the links (10) and (20) are connected to a pin (9).
It is pivotally mounted in an X shape by (9). The upper ends of the left and right links (10) and (10) are connected to the movable shaft (1).
In 1), the lower ends of the left and right links (20) and (20)
The movable shafts (21) are connected to each other, and synthetic resin rollers (12) and (22) are mounted on both ends (21a) of the movable shafts (11) and (21), respectively. (22) is a guide section (a) provided in the upper frame (b) and the lower frame (a) and having a U-shaped cross section.
₁ ) (b ₁ ) is slidably fitted in the direction of the arrow in FIG. On the other hand, the lower end of the link (10) and the link (2
The upper end of 0) is formed by shafts (13) and (23), respectively.
It is pivotally mounted on the upper frame (b) and the lower frame (a). (SB) in the figure indicates a seat back.

[0003]

The above-mentioned conventional product comprises rollers (12) (2) provided on a movable shaft (11) (21).
2) slides in the guide portions (a ₁ ) and (b ₁ ) of the lower frame (a) and the upper frame (b) in the direction of the arrow in FIG. 4 to absorb vibration (the upper frame and the lower frame). (Along with a vibration absorbing mechanism such as a damper disposed between them), but has the following disadvantages.

That is, the guide portion is formed by bending a sheet metal into a U-shape, but it is difficult to control the accuracy of the guide portion.
The rollers that slide in the guide are apt to play, and
The roller is formed of a hard synthetic resin, but may be damaged in a dry state in winter. Also, since the roller integrated with the movable shaft is mounted and assembled in the U-shaped guide portions provided on the upper frame and the lower frame, there is a problem that the assemblability is extremely poor. Then, this invention aims at eliminating such a defect of the conventional product.

[0005]

In order to achieve the above object, the present invention provides a guide slot having a movable shaft provided on the movable end side of an X-shaped link so that both ends of the movable shaft can be directly slidably inserted. The synthetic resin slider described above is used as a guide, and this guide is integrally fastened to the lower frame. The movable shaft described above penetrates through an elongated hole provided in a support bracket fixed to the vehicle floor, so that the support bracket bears part of an upward load (peeling load) applied to the movable shaft on the vehicle floor. It is desirable.

[0006]

The two ends of the movable shaft slide in the guide elongated holes of the slider integrally fastened to the lower frame and the upper frame to absorb vibration applied to the seat.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The drawing shows the conventional X-shaped link (1).
0) (10) (20) (20)
0) A movable shaft (21) connecting the (20) and a movable portion on the lower frame (5) side of the movable shaft (21). The lower frame (5) has an L-shaped cross section. A slider (3) is integrally fastened to the inside of the lower frame (5) with fastening materials (not shown) such as bolts and rivets. (32) (32) (52) (5)
2) indicates a through hole for inserting a fastening material. The lower frame shown in FIG. 2 is a pan-shaped frame including left and right upright portions (51) (51) for fixing the sliders (3) (3) and a bottom portion (52) fixed to the vehicle floor or a slide rail. It is.

The slider (3) is a hard synthetic resin (polyethylene, polyamide, etc.) having excellent rigidity and abrasion resistance.
In the center, a guide slot (31) long in the movable direction of the movable shaft (21) is formed.
Both ends of the movable shaft (21) are inserted into 1), and slide in the guide slot (31).

The movable shaft (21) integrally connects the links (20) and (20) similarly to the conventional product, but between the links (20) and (20), as shown in FIG. It is supported on the bottom (53) of the mold lower frame or on a support bracket (4) fixed directly to the vehicle floor. In the figure (4
4) indicates a nut, and (45) indicates a bolt.

The support bracket (4) is made of a rigid synthetic resin having rigidity and a metal plate, and has an upright engagement (41) having the same long hole (41) as the guide long hole (31) of the slider (3). (42) and a fixing portion (43) fixed to the vehicle floor or the bottom (53) of the pan-type lower frame, and a movable shaft (41) is provided in the elongated hole (41) provided in the locking portion (42). 21) penetrates.

The left and right links (10) in FIG.
A movable shaft (1) connecting the upper ends of (10) together
Both ends of 1) are desirably slidably inserted into the slider directly fixed to the upper frame (b) as in the above embodiment. That is, the upper frame (b) has an L-shaped cross section, and the slider is integrally fastened to the upper frame (b), and both ends of the movable shaft (11) are directly slid in the guide slots provided in the slider. Insert as possible. In this case, the support bracket (4) becomes unnecessary.

[0012]

The present invention has a structure in which the movable shaft is directly inserted into the slider integrated with the lower frame and slides in the guide long hole of the slider. Do not use a bent guide section and rollers. For this reason, it is not necessary to control the accuracy of the guide portion, and it is possible to eliminate defects such as breakage of the roller.

Further, since the slider can be fastened to the lower frame in a state where the movable shaft in the suspension device having the X-shaped link is inserted into the slider,
The assemblability of the suspension device is improved. In addition, since the movable shaft is penetrated by the support bracket on the vehicle floor side, a part of the peeling load applied to the movable shaft is borne by the support bracket. Therefore, since the peeling load applied to both ends of the movable shaft is reduced, escape of the movable shaft from the slider can be prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of the present invention.

FIG. 2 is a sectional view of a main part of the present invention.

FIG. 3 is a cross-sectional view of a main part of the present invention, in which a movable shaft is inserted into a slider.

FIG. 4 is a side view of a conventional product.

FIG. 5 is a sectional view taken along the line VV of FIG. 4;

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 4;

[Explanation of symbols]

 3 Slider 5 Lower frame 21 Movable shaft

Claims (1)

(57) [Scope of request for utility model registration] 1. A pair of left and right X-shaped links are disposed between a lower frame fixed to a vehicle floor side and an upper frame fixed to a seat side, and movable ends of the left and right links are movable shafts. And the movable shaft is movably mounted in guides provided in the lower frame and the upper frame. The guide is integrally fastened to the lower frame. It is made of a synthetic resin slider with a guide slot, and both ends of the movable shaft are directly slidably inserted into the guide slot of the slider, and the movable shaft is provided on a support bracket fixed to the vehicle floor side. Suspension device for automobile seats penetrated into long holes.