JPH0524429U - Stopper structure for automobile seats - Google Patents

Abstract

(57) [Abstract] [Purpose] In automobile seats, smooth reverse rotation of the screw shaft. [Structure] Washers 12, 13 are rotatably provided between the stoppers 9, 11 of the screw shaft 3 and the impact absorbing rubber members 10, 10. By the compression of the rubber members 10 and 10, the washers 12 and 13 contact the stoppers 9 and 11,
When the rubber members 10, 10 are twisted, the washers 12,
13 rotates with respect to the stoppers 9 and 11, and accordingly the rubber members 10 and 10 also rotate, and the slide nut 6
Will not be twisted and the coefficient of friction will decrease.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stopper structure for a vehicle seat.

[0002]

[Prior Art]

 BACKGROUND ART Conventionally, as a vehicle seat, for example, a power seat, as shown in FIGS. 2 and 3, a seat 1 is supported by a slider 1 and a worm wheel connected to a screw shaft 3 attached to the seat 2 side is used as a motor. There is one in which the seat 2 is moved forward and backward by being rotated by a worm driven by, and the screw shaft 3 which is screwed into the sliding nut 6 being rotated.

In order to regulate the forward / backward movement position of the seat 2, a stopper 8 is welded and fixed to the screw shaft 3, and a stopper 9 is integrally provided on the screw shaft 3. Then, the shock absorbing rubber members 10 and 10 are rotatably fitted to the stoppers 8 and 9, respectively.

[0004]

[Problems to be solved by the device]

 However, since the rubber members 10 and 10 are merely fitted to the stoppers 8 and 9 integrated with the screw shaft 3, the rubber members 10 and 10 are attached to the slide nut 6 when the seat 2 moves forward and backward. When it is stopped, the rubber members 10, 10 are twisted while being compressed by the rotational force of the screw shaft 3 and bite the slide nut 6. As a result, there is a problem that the friction coefficient increases and it becomes impossible to rotate the screw shaft 3 in the reverse direction. There is also a problem that the rubber members 10 and 10 are twisted and deformed and come off from the stoppers 8 and 9.

Therefore, an object of the present invention is to provide a stopper structure for a vehicle seat, in which the coefficient of friction at the time of stop is reduced and the reverse rotation of the screw shaft is smooth.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention rotates a worm wheel connected to a screw shaft attached to a seat by a worm driven by a motor and rotates a screw shaft screwed to a slide nut to rotate the seat. In a vehicle seat that moves back and forth or up and down in various places, a stopper for a slide nut is integrally provided on the screw shaft, and a rubber member for impact mitigation is provided on the stopper, and the rubber member and the stopper are provided. A washer is rotatably installed between the two.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. It should be noted that parts having the same configurations and operations as those of the conventional technique shown in FIG.

As shown in FIG. 1, a circular disk-shaped stopper 9 is integrally provided on the front side of the screw shaft 3, and a stopper 11 is provided on the small shaft section 3a on the rear side. It is inserted and fixed by welding. A disk-shaped washer 12 is rotatably fitted between the small shaft portion 3a and the stopper 11.

A shock absorbing rubber member 10 is fitted to the stopper 9 of the screw shaft 3, and the rubber member 10 has an inward hook portion 10a engaged with an outer step portion 9a of the stopper 9 by overhanging. ing. A disk-shaped washer 13 is rotatably fitted between the rubber member 10 and the stopper 9.

The impact absorbing rubber member 10 is also fitted to the washer 12, and the rubber member 10 has the inward hook portion 10 a engaged with the outer step portion 12 a of the washer 12 by an overhang.

With the above configuration, the rubber member 10 of the stopper 9 is abutted against the slide nut 6 when the seat 2 moves backward. At this time, the rubber member 10 tends to be twisted while being compressed by the sliding nut 6, but the washer 13 comes into contact with the stopper 9 due to the compression of the rubber member 10, and the washer 13 is twisted due to the twisting of the rubber member 10. Since the rubber member 10 rotates with respect to the stopper 9 and the rubber member 10 also rotates with it, the rubber member 10 is not twisted by the slide nut 6. As a result, the rubber member 10 is less likely to bite the slide nut 6 and the friction coefficient is reduced, so that the screw shaft 3 can be smoothly rotated backward in the forward direction.

On the other hand, when the seat 2 advances, the rubber member 10 of the washer 12 of the stopper 11 is abutted against the slide nut 6. At this time, the rubber member 10 tends to be twisted while being compressed by the sliding nut 6, but the washer 12 comes into contact with the stopper 11 due to the compression of the rubber member 10, and the washer 12 is stopped by the torsion of the rubber member 10. Since the rubber member 10 rotates with respect to 11, and the rubber member 10 also rotates accordingly, the rubber member 10 is not twisted by the slide nut 6. As a result, the rubber member 10 is less likely to bite into the slide nut 6 and the friction coefficient is reduced, so that the screw shaft 3 can be smoothly rotated backward in the backward direction. In both cases of the forward and backward movement of the seat 2, the rubber members 10, 10 are less likely to be twisted and deformed, and thus are less likely to fall off the stoppers 9, 12.

A structure in which a washer 13 is interposed between the stopper 9 and the rubber member 10, or a washer 12 is interposed between the stopper 11 and the stepped portion of the small shaft portion 3 a of the screw shaft 3. With the configuration provided, the rubber members 10, 10 prevent the washers 13, 12 from rattling, so that vibrations and abnormal noises of the washers 13, 12 themselves can be prevented. In the above embodiment, the stoppers 8 and 9 for restricting the front-back movement position of the seat 2 are used, but it goes without saying that the present invention can be applied to a stopper such as a lifter that moves the seat 2 up and down.

[0014]

[Effect of the device]

 As is apparent from the above description, the stopper structure of the present invention has a washer rotatably provided between the stopper of the screw shaft and the impact absorbing rubber member. Therefore, when the rubber member tries to be twisted while being compressed by the slide nut, the washer comes into contact with the stopper due to the compression of the rubber member, and the washer rotates with respect to the stopper due to the twisting of the rubber member. Since the material also rotates, the rubber member can no longer be twisted by the slide nut. As a result, the rubber member is less likely to bite into the slide nut, and the friction coefficient is reduced, so that the reverse rotation of the screw shaft is smooth. Also, since the rubber member is less likely to be twisted and deformed, it will not fall off the stopper.

[Brief description of drawings]

FIG. 1 is a sectional view of a stopper structure of the present invention.

FIG. 2 is a sectional view of a conventional stopper structure.

[Fig. 3] Side view of an automobile power seat

[Explanation of symbols]

1 ... Slider, 2 ... Seat, 3 ... Screw shaft, 6 ... Slide nut, 9,11 ... Stopper, 10 ... Rubber member,
12, 13 ... Washers.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Creator Yukihiro Kaya 9-228 Kegoya, Kure City, Hiroshima Sigma Co., Ltd. (72) Yasuhiro Okuda 9-2-28 Kegoya, Kure City, Hiroshima Sigma Within the corporation

Claims (1)

[Scope of utility model registration request] 1. A vehicle in which a worm wheel connected to a screw shaft attached to a seat is rotated by a worm driven by a motor, and the seat shaft is moved back and forth or up and down by rotation of a screw shaft screwed into a slide nut. In the seat for use, a stopper for a slide nut is integrally provided on the screw shaft, a shock absorbing rubber member is provided on the stopper, and a washer is rotatably provided between the rubber member and the stopper. A stopper structure for automobile seats characterized by being provided.