JPH023942Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat slide device for adjusting the longitudinal position of a passenger car seat.

This type of seat slide device generally consists of a lower rail 11 fixed to the vehicle floor surface and an upper rail 12 slidably fitted to the lower rail 11, as shown in FIGS. 1 to 3. A sheet 13 is fixed onto 12. Conventionally, as shown in FIG. 1, the seat 13 has mainly been integrally provided with a cushion seat frame 14 extending over the entire length of the upper rail 12 on its lower surface, and this cushion seat frame 14 is fixed to the upper rail 12. was. However, in recent years, from the viewpoint of weight reduction and cost reduction, a structure has been proposed in which the cushion seat frame 14 is simplified and the lower arm 16 of the reclining device 15 is directly fixed onto the upper rail 12 as shown in FIG.

In the structure shown in FIG. 2, it is possible to reduce the weight by simplifying the cushion seat frame 14, but on the other hand, due to the engagement structure between the lower rail 11 and the upper rail 12, the lower arm 16 is connected to the entire length of the upper rail 12. There was a problem in that sufficient strength could not be obtained unless it was made large enough to cover.
That is, for example, as shown in FIG.
If the front end is fixed approximately at the center of the upper rail 12, the upper rail 12 will be bent from approximately the center due to the rearward force applied to the seat back 17, and the upper rail 12 will be bent from the lower rail 11. There is a risk of it peeling off.

According to the analysis by the present inventors, this bending of the upper rail 12 is caused by the bending of the lower rail 11 and the upper rail 1.
2 has a constant cross section, and a rolling roller 18 and a rolling ball 19 are inserted between both rails. In the conventional device, the clearance L of the vertically opposing portion between the lower rail 11 and the upper rail 12 is set to a certain level or more due to the structure. Therefore, lower rail 1
1 is considered to be caused by the inability to provide any resistance to the bending of the upper rail 12.

This invention was made based on the above analysis with the direct purpose of solving the above-mentioned problem of bending of the upper rail.In contrast to the lower rail fixed to the vehicle floor, the upper rail fixed to the seat side In a seat slide device in which the lower arm of the reclining device is fixed to the rear part of the upper rail in a slidable manner, the lower rail and the upper rail are vertically spaced apart from each other at a position corresponding to the tip of the lower arm of the reclining device. A deformation prevention part is provided in a part of the vertically opposing parts that approach each other when the rails are moved, which reduces the vertical clearance between both rails compared to other parts and prevents the upper rail from bending and deforming. It is said that

The invention will now be described with reference to the illustrated embodiments. In each of the following embodiments, lower rail 11, upper rail 12, lower arm 16, seat back 1
7. The rolling roller 18 and rolling ball 19 are the same elements as in the conventional device. The lower rail 11 has a U-shaped cross section 20 that is open at the top, and a retaining edge 2 that is bent outward from the upper end of this U-shaped cross section 20.
1 and 21 integrally. On the other hand, the upper rail 12 has a U-shaped cross section 22 that is larger than the lower rail 11 and opens downward, and this U-shaped cross section 2.
Retaining edge 23, 2 bent inward from the lower end of 2
It has 3 in one piece. The U-shaped cross section 20 of the lower rail 11 is connected to the retaining edge 2 of the upper rail 12.
The retaining edge 21 and the retaining edge 23 are vertically opposed to each other when the lower rail 11 and the upper rail 12 are engaged. The retaining edges 21 and 23 are in a relationship such that when the lower rail 11 and the upper rail 12 are separated in the vertical direction, they approach each other.

The rolling roller 18 has a U-shaped cross section 20 of the lower rail 11 and a U-shaped cross section 2 of the upper rail 12.
The rolling ball 19 is inserted between the bottoms of the
It is inserted between the retaining edge 21 of the lower rail 11 and the retaining edge 23 of the upper rail 12, so that the upper rail 12 can be lightly slid with respect to the lower rail 11. Rolling roller 1
8 and the rolling ball 19 are respectively held by the lower rail 11 and the upper rail 1 by known holding means.
2, but this retaining means is not shown.

As is clear from the above structure, the lower rail 11
Between the top rail 12 and the top rail 12, there is a clearance L in the vertical direction between the retaining edges 21 and 23, which approach each other when the rails are moved apart in the vertical direction. It was causing the twist.

Therefore, the present invention partially reduces this clearance to prevent the upper rail 12 from bending, and FIGS. 5 and 6 show a first embodiment thereof. In this embodiment, the reclining device 15 is located approximately at the center of the upper rail 12 in the longitudinal direction.
At a position corresponding to the tip of the lower arm 16, the retaining edge 23 is drawn on the retaining edge 21 side of the lower rail 11 to form a deformation preventing portion 25. The clearance c between the retaining edge 23 and the retaining edge 21 in the deformation preventing portion 25 is set as small as possible without interfering with the sliding movement of the lower rail 11 and upper rail 12.

7 and 8 show a second embodiment of the present invention, in which a substantially central portion of the retaining edge 21 of the lower rail 11 is drawn to the side of the retaining edge 23 of the upper rail 12, and similarly deformed. A prevention portion 25 is formed.

In addition, FIGS. 9 and 10 show a deformation prevention material 2 which is a separate member from the lower rail 11 and upper rail 12.
6 is inserted between the retaining edge 21 of the lower rail 11 and the retaining edge 23 of the upper rail 12 to form the deformation prevention portion 25. The deformation prevention material 26 is attached to the retaining edge 21 or the retaining edge 23.
It is preferable to use adhesive or the like to fix it. Also in this third embodiment, the clearance c in the deformation preventing portion 25 is set as small as possible.

According to the seat sliding device in which the deformation preventing portion 25 is formed as described above, the reclining device 15
When a large force is applied to tilt the seat back 17 backward, the center portion of the upper rail 12, that is, the deformation prevention portion 2
5 has the largest peeling load. However, since the clearance c of this deformation prevention part 25 is set smaller than other parts, the retaining edge 23 of the upper rail 12 immediately interferes (contacts) with the retaining edge 21 of the lower rail 11, and its deformation is prevented. Ru. That is, in order to deform the upper rail 12, the lower rail 11 must also be deformed at the same time. Therefore, the lower rail 11 provides resistance to the deformation of the upper rail 12, and therefore, even without changing the material of the upper rail 12 or increasing the plate thickness, the lower rail 11 can be deformed at the same time. deformation can be prevented.

As described above, according to the present invention, in a seat slide device of a type in which a lower arm of a reclining device is fixed on the rear part of an upper rail that is slidably fitted into a lower rail, a part of the vertically opposing portions of the lower rail and the upper rail In addition, a deformation prevention part was provided at a position corresponding to the tip of the lower arm that narrows the vertical clearance between both rails compared to other parts, so that the peeling load applied to the upper rail through the tip of the lower rail of the reclining device is particularly reduced. This deformation preventing portion can effectively resist deformation of the upper rail.

[Brief explanation of the drawing]

Figures 1 and 2 are side views showing examples of conventional seat slide devices, Figure 3 is a sectional view taken along the - line in Figures 1 and 2, and Figure 4 shows the lower arm of the reclining device. Side view showing the possibility of bending deformation of the Atsupa rail when downsized, Part 5
The figure shows a partially enlarged cross-sectional side view showing the first embodiment of the seat slide device of the present invention;
The figure is a sectional view taken along the - line in Fig. 5, Fig. 7 is a partially enlarged cross-sectional side view showing a second embodiment of the present invention, and Fig. 8 is a sectional view taken along the - line in Fig. 7. A cross-sectional view along FIG. 9 shows a third embodiment of the present invention,
FIG. 10 is a side view showing a partially enlarged cross-section, and FIG. 10 is a cross-sectional view taken along line X--X in FIG. 9. 11...Lower rail, 12...Atsupa rail,
13... Seat, 15... Reclining device,
16... Lower arm, 17... Seat back, 1
8...Rolling roller, 19...Rolling ball, 20...
... U-shaped cross section, 21 ... Retaining edge, 22 ...
U-shaped cross section, 23... retaining edge, 25... deformation prevention part, 26... deformation prevention material.

Claims (1)

[Scope of Claim for Utility Model Registration] A seat slide in which a top rail fixed to the seat side is slidably fitted to a lower rail fixed to the vehicle floor side, and a lower arm of a reclining device is fixed onto the rear part of the top rail. In the device, a portion of the vertically opposing portion of the lower rail and the upper rail, which is located at a position corresponding to the tip of the lower arm of the reclining device and approaches each other when they are separated in the vertical direction, is provided with a vertically facing portion between both rails. The clearance of the area is reduced compared to other parts,
A seat slide device characterized by being provided with a deformation prevention part that prevents the top rail from bending and deforming.