JPH0712158Y2 - Seat slide device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat slide device, and more particularly to a seat slide device suitable for supporting a seat on a floor of a vehicle body in a slidable manner.

[0002]

2. Description of the Related Art Conventionally, as this type of device, a seat slide device for an automobile has an upper rail to which a seat is attached and a lower rail provided on a floor of a vehicle body formed by bending a steel plate, and The upper rail is slidably guided along the longitudinal direction with respect to the lower rail, and the guide portion is slidably fitted to each other by bending the upper rail and the lower rail intricately by press molding. The structure is such that rollers and balls are rotatably interposed in the fitting portion.

[0003]

However, in the conventional seat slide device as described above, the structure of the guide portion between the upper rail and the lower rail is complicated, and complicated place forming of each rail and their assembly are required. Considering this, it is necessary to secure a predetermined margin dimension, and there is a problem that the margin dimension causes play.

An object of the present invention is to provide a seat slide device which can guide a seat slidably with a simple structure without causing play.

[0005]

In a seat slide device for slidably supporting a seat on a floor, the seat slide device is attached to one side of the seat or the floor and extends along the sliding direction of the seat. A second guide body having a first guide body having a substantially rectangular cross section and a hollow portion having a substantially cylindrical cross section which is attached to the other side of the seat or the floor and fits on an outer peripheral portion of the first guide body. And a plurality of balls that are interposed in the fitting portions of the first and second guide bodies and are scattered along the circumferential direction of the fitting portions,
It is characterized in that it is provided with the regulation means for regulating the position of the ball in the sliding direction of the seat, the regulation means being provided in the second guide body.

[0006]

The seat slide device of the present invention guides the seat slidably by the combination of the first and second guide bodies having a simple sectional shape and the plurality of balls having the uniform size. . This eliminates the need to secure a large margin when manufacturing or assembling those components, and eliminates the play caused by the margin.

Further, by providing the outer peripheral portion of the first guide body with a flat surface which is inclined with respect to the acting direction of the seat load, the seat load is utilized to fit the fitting portions of the first and second guide bodies. Interpose the ball with strong pressure,
Especially, the backlash in the lateral direction is more reliably suppressed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In the drawings, reference numeral 1 is an upper rail having a substantially T-shaped cross section, and a vehicle seat (not shown) is mounted on the upper rail. A rod (first guide body) 2 having a square cross section extending in the longitudinal direction is provided at the lower portion of the upper rail 1, and a right side 2A of the rod 2 is used for latch engagement. A plurality of grooves 2B are formed at regular intervals along the longitudinal direction of the rod 2.

Reference numeral 3 is a lower rail fixedly mounted on the floor of the vehicle body, and has bearing members (second guide members) 5 provided at both ends and an intermediate portion of the rail base 4 in total. There is. The bearing body 5 is formed in a substantially C-shaped cross section having a cutout portion 5A in the upper portion, and a bottom portion 5B having a flat lower surface is provided in the lower portion thereof. The inner surface of the hollow portion 5C of the bearing body 5 is located on the same circumferential surface centered on the longitudinal axis O ₁ . Therefore, the hollow portion 5C
Has a columnar cross section except for the portion where the cutout portion 5A is formed.

A rod 2 is slidably fitted in the hollow portion 5C of the bearing body 5 through a plurality of balls 6 along the longitudinal direction thereof, and the upper rail 1 above the rod 2 is fitted. The bearing body 5 projects upward from the cutout portion 5A. All the balls 6 have the same diameter, and as shown in FIG. 2, between the respective intermediate positions P of the four peripheral surfaces 2C, 2D, 2E and 2F of the rod 2 and the inner peripheral surface of the bearing body 5. The rod 2 is held inside the bearing body 5 by interposing. Since the intermediate position P is a position shifted by 90 ° at equal intervals in the circumferential direction of the rod 2, the balls 6 are not
The rod 2 will be held on the axis O ₁ . Also,
An inner flange portion 5D is formed on one end side of the hollow portion 5C of the bearing body 5, and a retaining ring 7 is fitted on the other end side of the hollow portion 5C. The inner flange portion 5D and the retaining ring 5D. 7
The ball 6 is tightly bound between the two.

In the case of this embodiment, six balls 6 are brought into pressure contact with each of the four peripheral surfaces 2C, 2D, 2E and 2F of the rod 2 inside one bearing body 5, and the respective peripheral surfaces 2C, 2D, 2E and 2F are pressed. The six balls pressed against the surface are in an intimate contact state as an example.

A bearing body 5 provided at an intermediate portion of the rail base 4 has a latch 8 engageable with the groove 2B of the rod 2.
Is attached rotatably around the axis O ₂ of the lever 9. The latch 8 is the latch bearing portion 5 of the bearing body 5.
It is attached by a lever 9 that rotatably penetrates E,
Moreover, the lever 9 is prevented from rotating. Its lever 9
Is rotatably supported by a lever support portion 5F of a bearing body 5 provided at an end of the rail base 4 on the front side of the vehicle body (on the right side in FIG. 1). Then, at the end of the lever 9, the handle 1 which is bent sideways from the lever support portion 5F.
0 is formed, and the latch 8 can be rotated about the axis O ₂ by operating the handle 10.

Reference numeral 11 in FIG. 1 is a torsion spring for urging the lever 9 in the direction of arrow A in FIG.

Next, the operation will be described.

First, when the handle 10 is not operated, the latch 8 is engaged with the groove 2B of the rod 2 by the urging force of the spring 11 to move the upper rail 1 to a predetermined sliding position as shown in FIG. It's locked.

When adjusting the slide of the upper rail 1, the handle 10 is rotated in the direction of arrow B against the biasing force of the spring 11 to disengage the latch 8. Then, after adjusting the slide of the upper rail 1, the handle 10
By releasing the operating force of the
The upper rail 1 is locked again by engaging with the groove 2B at the corresponding position by the urging force of.

By the way, the balls 6 in the bearing body 5 are in pressure contact with the respective positions P which are deviated by 90 ° at equal intervals in the circumferential direction of the rod 2, so that the axis of the rod 2 and the axis O _{1 of the} bearing body 5 are in contact with each other. And are automatically centered, and the rod 2 is reliably positioned and held in the center of the bearing body 5.
When adjusting the slide of the upper rail 1, the rod 2 slides smoothly while sliding on the balls 6 or rolling the balls.

Further, the seat load applied to the rod 2 suppresses the play between the rod 2 and the bearing body 5. That is, the downward seat load applied to the rod 2 causes a horizontal component force on the lower peripheral surfaces 2D and 2E of the rod 2 that pushes the ball 6 in contact with them outward.
This is because the balls 6 are interposed between the rod 2 and the bearing body 5 in a state of being strongly pressed against each other. Therefore, the seat load is effectively used, and the occurrence of backlash in the vertical and horizontal directions is suppressed. As for seat load, in addition to seats and seated persons, upper rail 1
The own weight of the rod and rod 2 is added.

Further, since the rod 2 and the bearing body 5 each having a simple sectional shape and the ball 6 having a uniform size are combined to form a guide mechanism for the upper rail 1,
It is not necessary to secure a large margin when manufacturing or assembling those parts. Therefore, it is possible to eliminate the play caused by the margin. It also improves productivity.

In contrast to the above embodiment, the bearing 5 may be provided on the upper rail 1 side and the rod 2 may be provided on the lower rail 3 side. The shape of the rod 2 is not limited to a regular quadrangle, as long as it has a substantially rectangular cross section having a flat surface on the outer peripheral portion.

[0022]

As described above, the seat slide device according to the present invention is constructed by combining the first and second guide bodies having a simple cross-sectional shape and the plurality of balls having a uniform size. Since the seat is slidably guided, it is not necessary to secure a large margin size when manufacturing or assembling those parts, and it is possible to eliminate rattling due to the margin size.

Further, by providing the outer peripheral portion of the first guide body with a plane inclined with respect to the acting direction of the seat load, the seat load can be utilized to fit the fitting portions of the first and second guide bodies. Interpose the ball with strong pressure,
In particular, backlash in the lateral direction can be suppressed more reliably.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a view on arrow II of FIG.

FIG. 3 is a cross-sectional perspective view of a bearing body portion shown in FIG.

4 is a perspective view of the latch shown in FIG. 1. FIG.

[Explanation of symbols]

 1 Upper Rail 2 Rod (First Guide Body) 2A One Side 2B Grooves 2C, 2D, 2E, 2F Circumferential Surface 3 Lower Rail 4 Rail Base 5 Bearing Body (Second Guide Body) 5A Cutout 5B Bottom 5C Hollow Part 5D Inner flange part 5E Latch bearing part 5F Lever bearing part 6 Ball 7 Retaining ring 8 Latch 9 Lever 10 Handle 11 Torsion spring

Claims (2)

[Scope of utility model registration request] 1. A seat slide device for slidably supporting a seat on a floor, which is attached to one side of the seat or the floor and has a substantially rectangular cross section extending along a sliding direction of the seat. A first guide body, a second guide body that is attached to the other side of the seat or the floor, and has a hollow portion having a substantially cylindrical cross section that fits into the outer peripheral portion of the first guide body; A plurality of balls interposed in the fitting portions of the first and second guide bodies and scattered along the circumferential direction of the fitting portions; and a plurality of balls provided in the second guide body in the sliding direction of the seat. A seat slide device, comprising: a restricting unit that restricts a position of the ball. 2. The seat slide device according to claim 1, wherein the first guide body has an outer peripheral flat surface that is inclined with respect to the acting direction of the seat load.