JPS634653Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a locking device for a seat adjuster that adjusts the seat position of an automobile or the like by moving it back and forth.

The seat adjuster is comprised of a slide device that slidably attaches an upper rail to a lower rail, and a lock device that fixes the upper rail at a desired position with respect to the lower rail. As shown in Fig. 1, the locking device has an engagement hole b formed in the side wall of the lower rail a, a notch d formed in one side wall of the upper rail c, and an insertion hole e formed in the other side wall. , the lock plate f is configured to pass through the insertion hole e and engage with the notch d and the engagement hole b.

By the way, when an external force is applied to the seat adjuster due to vibrations while the vehicle is running, the upper rail c
tries to deform using the roller g interposed between it and the lower rail a as a fulcrum, and in this case, since the upper rail c is provided with the notch b as described above, the rigidity of the upper rail is reduced at the position of the notch b. decreases,
Therefore, there is a risk that the upper rail c may deform as shown in FIG. 2 around the position of the notch and become disengaged from the lock plate f.

In addition, the lock plate is designed to be disengaged by operating a lever (not shown), but if the notch is deformed due to incorrect operation of the lever, the engagement margin for the upper rail with the notch becomes smaller. There is a risk that the lock strength will decrease.

In view of these problems, the present invention aims to provide a locking device for a seat adjuster that can prevent the upper rail from deforming and coming off the locking plate, and can maintain the locking strength at a high value. .

An embodiment of the present invention will be described below with reference to FIGS. 3 to 9. Figure 3 is a plan view showing a seat adjuster to which the locking device of the present invention is applied;
The figure is a side view thereof, and FIG. 5 is a sectional view taken along the line V-V in FIG. 3.

This seat adjuster has a slide device and
It consists of a lock device attached to this slide device. The slide device consists of a lower rail 1 fixed to the vehicle body, and an upper rail 2 slidably attached to the lower rail 1 via rollers 3 and balls 4.

As shown in FIG. 6, the lower rail 1 has side walls 1a, 1'a bent in the longitudinal direction on both sides of a long metal plate, and ball receiving walls 1b, 1'a on the upper end thereof. 1'b are formed by bending each other in the horizontal direction. Like the lower rail 1, the upper rail 2 is also provided with side walls 2a, 2'a and ball receiving walls 2b, 2'b, respectively. Both rails are constructed by arranging the side wall 2'a of the upper rail 2 between both side walls 1a and 1'a of the lower rail 1 so that the ball receiving walls 2'b and 1b face each other, and Both side walls 2a,
A side wall 1'a of the lower rail 2 is arranged between the ball receiving walls 2'a, and the ball receiving walls 2b and 1'b are opposed to each other. Balls 4 are disposed in the space between the ball receiving walls 2b and 1'b, and in the space between the ball receiving walls 2'b and 1b, and between the upper and lower rails. A roller 3 is provided. The rollers 3 and balls 4, 4 are held in alignment by a retainer (not shown).

Further, as shown in FIG. 7, the lower rail 1
A plurality of engagement holes 11 are formed along the longitudinal direction in the side wall 1a of the locking device for engaging the engagement piece at the tip of the locking plate 5 of the locking device, while the ball receiving wall 2 of the upper rail 2 A notch 21 is provided at the side wall 2b, and a locking plate insertion hole 22 is provided at the top of the other side wall 2a.

The locking device is composed of a locking plate 5, a spring 6, and a lever 7. The lock plate 5 has an engagement piece 5c bent downward through a step 5b at the tip of the base plate 5a. This lock plate 5 inserts the board 5a into the insertion hole 22, and under normal conditions, the elasticity of the spring 6 causes the notch 21 to
The engagement piece 5c is engaged with the engagement hole 11.
The spring 6 has both ends in contact with the side walls of the upper rail, and its center part in contact with the stepped portion 5b of the locking plate.
The engagement piece 5c of the lock plate 5 is biased so as to engage with the notch 21 and the engagement hole 11.

Further, a connecting hole 51 is provided in the base plate 5a of the lock plate 5 which protrudes from the side of the upper rail 2, and a connecting piece 7a formed by bending the lever 7 is engaged with the connecting hole 51. The lever 7 is pivotally connected to a bracket 8 fixed to the upper surface of the upper rail 2 by a pin 9, and when operated in the direction of the arrow in FIG. 3, it rotates about the pin 9 and engages the lock plate 5. Piece 5
c can be disengaged from the engagement hole 11 against the elasticity of the spring 6.

In the present invention, a stepped portion 10 bent downward is formed in a part of the ball receiving wall 2'b of the upper rail 2, and the notch 21 extending to the ball receiving wall 2'b is formed in the stepped portion 10. form.

The stepped portion 10 may be one that is inclined downward with respect to the ball receiving wall 2'b, as shown in FIG.
Alternatively, as shown in FIG. 9, the edge of the side wall 2'b may be extended downward and bent parallel to the ball receiving wall 2'b. The cutout portion 21 opens the lower end of the stepped portion 10 to form the ball receiving wall 2'.
A notch is formed extending from the ball receiving wall 2'b to the stepped portion 10 so that the engaging piece 5c of the lock plate 5 engages with the stepped portion 10 from the ball receiving wall 2'b.

As described above, the locking device of the present invention has a stepped portion 10 bent downward in a part of the ball receiving wall 2'b, and a notch in the stepped portion that extends to the ball receiving wall 2'b. 21 is provided, the rigidity of the upper rail near the notch 21 is increased by the stepped portion 10, thereby preventing deformation from the vicinity of the notch when the upper rail receives an external force that would deform it. Moreover, since the engaging piece 5c of the locking plate 5 engages with the notch 21 formed from the stepped part 10 to the ball receiving wall 2'b, the locking strength is increased and the upper rail 2
can be reliably prevented from coming off from the lock plate 5.

As described above, according to the present invention, even if a load that deforms the upper rail acts on the upper rail, the rigidity near the notch is increased to prevent deformation from the vicinity of the notch, and This has the effect of improving the lock strength between the engagement piece of the lock plate and the notch.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an outline of a locking device for a conventional seat adjuster, FIG. 2 is a schematic explanatory diagram showing the deformation state of a conventional upper rail, FIG. 3 is a plan view showing a seat adjuster to which the locking device of the present invention is applied, FIG. 4 is a side view of the same, FIG. 5 is a cross-sectional view taken along the line - in FIG. 3, FIG. 6 is a cross-sectional view showing the assembled state of the upper rail and the lower rail, FIG. 7 is an enlarged cross-sectional view showing the main part of the locking device of the present invention, and FIG. 8a is a cross-sectional side view showing the main part of the upper rail of the present invention.
FIG. 8b is a front view of the same, FIG. 9a is a cross-sectional side view showing another example of the upper rail of the same, and FIG. 9b is a front view of the same. 1...lower rail, 2...upper rail, 1a,
2a, 1'a, 2'a...side wall, 1b, 2b, 1'
b, 2'b ... ball receiving wall, 5 ... lock plate, 5
c: lock plate engagement piece, 6: spring, 1
0...step portion, 21...cutout portion.

Claims (1)

[Scope of utility model registration request] An insertion hole is provided in one side wall of the upper rail, and a notch is formed in the ball receiving wall of the other side wall,
and a seat adjuster in which a plurality of engagement holes are provided in one side wall of the lower rail, a lock plate is passed through the insertion hole, and an engagement piece at the tip thereof is engaged with the notch and the engagement hole. In the locking device, a stepped portion bent downward is formed in a part of the other ball receiving wall of the upper rail, and the cutout portion extending to the ball receiving wall is formed in the stepped portion. A seat adjuster locking device featuring: