JPS645624Y2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Field of Industrial Application The present invention relates to an improvement in a locking device for fixing the sliding position of an automobile seat slide device.

(2) Prior Art and Problems In general, the front seat of a car can be slid forward and backward by a seat slide device installed on the underside of the seat. The structure is such that a device can fix the sliding position of the seat to give the driver a comfortable driving position.

Conventionally, this type of seat slide device S, as shown in FIGS. 1 and 2, has a seat cushion (not shown) on a lower rail 1 fixed to a floor (not shown) or the like. An upper rail 2 fixed to the lower surface is slidably attached, and a locking device L for fixing the sliding position of the upper rail 2 is provided on the upper rail 2 via a bracket 3. This lock device L has a lock bar 6 supported by the front and rear support walls 4 and 5 of the bracket 3 so as to be slidable in a direction substantially perpendicular to the longitudinal direction of the upper rail 2.
Both ends of the spring 7 wound around the lock bar 6 are connected to the rear support wall 5 of the bracket 3 and the lock bar 6.
The lock bar 6 is always biased in the locking direction (direction of arrow a shown in FIG. 2) by being locked with a locking pin 8 integrally provided with the locking pin 8, and the lock bar 6 is always biased in the locking direction (direction of arrow a shown in FIG. 2). The structure is such that the upper rail 2 is fixed by fitting the tip of the lock bar 6 into a plurality of locking holes 10 provided at predetermined intervals. Further, the bracket 3 has a lever 11 near its rear end pivoted by a shaft pin 9, and a protrusion 12 provided upright at the rear end of the lever 11 is engaged with the locking pin 8. By rotating the lever 11 in the horizontal direction, the lock bar 6 can be moved forward and backward relative to the lower rail 1.

Therefore, when the tip grip portion 13 of the lever 11 is rotated against the spring 7 in the direction of the arrow b shown in FIG. The top rail 2 moves to , and its tip comes out of the locking hole 10, allowing the upper rail 2 to slide. Then, when the lever 11 is released again at an appropriate position, the lock bar 6 moves in the direction of arrow a by the action of the spring 7, and its tip engages the locking hole 10, so that the locked state is maintained again. .

However, in such a conventional lock device, the lock bar 6 is locked and unlocked by rotating the lever 11 disposed under the seat in the left and right directions on a horizontal plane.
1 becomes larger, and a large space must be secured under the seat for this purpose, which tends to increase the overall size of the device. had become a nuisance. In addition, in such a structure, since the lever 11 is supported at one point with respect to the bracket 3, the strength is unstable, and there are also problems such as the lever 11 rattling due to vibrations of the vehicle body while driving. It was hot.

(3) Purpose of the invention The present invention has been made by focusing on the above-mentioned conventional problems, and its purpose is to reduce the size of the entire seat slide device by reducing the operation of the lever. It is an object of the present invention to provide a locking device for a seat slide that is lightweight, improves the operability of the lever, and improves the supporting strength of the lever.

(4) Structure of the invention The present invention provides a lower rail having a substantially U-shaped cross section with a plurality of locking holes, an upper rail that is slidably attached to the lower rail, and a lock that is attached to the upper rail. In the seat slide device, the locking device includes a bracket fixed to the upper rail, a lever arranged substantially parallel to the upper rail and rotatably supported by the bracket, and a lever attached to the bracket in the longitudinal direction of the lower rail. A lock plate that is supported so as to be slidable in substantially orthogonal directions and that engages and disengages from the locking hole of the lower rail when the lever is rotated; The spring is fixed to the lock plate at one end, and the other end is fixed to the bracket to constantly bias the lock plate in the locking direction.

(5) Examples of the invention The present invention will be explained in detail below based on the attached drawings.

FIG. 3 shows an embodiment of a seat slide device S equipped with a locking device L according to the present invention, and this seat slide device S has a pair of slide rails 16a, 1
6b, and slide rails 16a,
A lower rail 17, which is a component of the seat 16b, is fixed to the floor via front and rear brackets 18 and 19, and an upper rail 20, which is slidably attached to the lower rail 17, is fixed to the seat cushion 22 of the seat 21. There is. Then, by operating the lever 23 of the locking device L provided on one slide rail 16a, the seat 21 can be locked.
You can slide it back and forth and fix it in the correct position.

As shown in FIGS. 4 to 8, the locking device L is provided approximately at the center of the upper rail 20, and is disposed approximately parallel to the upper rail 20 on a bracket 15 whose one end is fixed to the upper rail 20. The rear end of the substantially L-shaped lever 23 is rotatably supported, and one side wall 24 of the lower rail 17
A lock plate 26 that engages and disengages from a plurality of locking holes 25 opened at predetermined intervals in the longitudinal direction is slidably supported, and is supported by a spring 27 stretched between the lock plate 26 and the bracket 15. , the lock plate 26 is always biased in the locking direction (direction of arrow a shown in FIG. 7).

In this embodiment, the bracket 15 is formed of a single plate-like member, and includes a flat part 28 welded to the upper surface of the upper rail 20, and a pair of bent parts on one side of the flat part 28. Cylindrical support portions 29a, 29b and each of these support portions 29
a, 29b, a front support wall 30a hanging from one side end of the flat part 28, and further extending to one side from the lower end of the front support wall 30a,
It is composed of a front support wall 30a and a rear support wall 30b that is erected at a position facing the front support wall 30a. The lever 23 is supported rotatably around its longitudinal direction by the supporting parts 29a and 29b, which fit and hold the two rear ends of the lever 23, and are attached to the front and rear supporting walls 30a and 30b. is slide hole 3
1a and 31b are respectively opened, and by inserting the longitudinal direction front and rear ends of the lock plate 26 formed in a substantially rectangular shape into these slide holes 31a and 31b, the lock plate 26 is aligned with the longitudinal direction of the lower rail 17. It is supported so as to be slidable in substantially orthogonal directions.

Further, a locking hole 25 formed in the lower rail 17 is provided at the longitudinal end of the lock plate 26.
In addition to being provided with a plurality of locking claws 32 that engage with each other, the rear part of the lock plate 26 is cut out on both sides and is narrower than the other parts, so that the lock plate 26 cannot be slid in the detachment direction. By bringing the cutout steps 33a and 33b into contact with the peripheral edge of the slide hole 31b of the rear support wall 30b, the amount of slide of the lock plate 26 in the removal direction is regulated and the lock plate 26 is prevented from falling off. .

The lock plate 26 is always urged in the locking direction by the elastic action of a spring 27 wound around the lever 23, but in this embodiment, a vertical groove 37 is formed at the rear of the lever 23. , one end of the rod-shaped portion 38 of the spring 27 inserted into the groove 37 from the rear end of the lever 23 is inserted into the lock plate 2.
6 and lock it in the pin locking hole 39 provided at the approximate center of the bracket 1.
By locking the spring 27 to one support portion 29a of the spring 27, an elastic action is imparted to the spring 27.
In this way, the lever 23 and the lock plate 26 are connected by the rod-shaped portion 38 at one end of the spring 27, so that unlike a pin, the lever 23 and the lock plate 26 do not fall off, and the connection is reliable.

In FIGS. 4 to 8, reference numeral 41 is a rotary roller built into the lower rail 17, and 42 is a rotating roller sandwiched between mounting flanges 43a and 43b extending in the longitudinal direction on both sides of the lower rail 17 and the upper rail 20. Steel balls 44 are retainers that respectively support the front and rear sides of the rotating roller 41 and steel balls 42 when the upper rail 20 slides; 45 and 46 are embossed portions provided on the lower rail 17 and the upper rail 20, respectively; Has a stopper function.

Therefore, the lock device L having such a configuration
In this case, the action of the spring 27 constantly urges the lock plate 26 in the locking direction via the rod-shaped portion 38 at one end, and the lower rail 17 is held at a predetermined position.
The upper rail 20 can be fixed by fitting the end locking pawl 32 of the lock plate 26 into the locking hole 25. In addition, when adjusting the position of the seat 21 in the longitudinal direction, as shown in FIG.
When the lever 27 is rotated upward (in the direction of arrow b shown in FIG. 8) against The lock plate 26 can be moved backward by the portion 38, and the distal end locking pawl 32 can be removed from the locking hole 25. In this state, the upper rail 20 becomes slidable, and when the seat 21 position is slid and adjusted and the grip portion 23a of the lever 23 is released again at the appropriate position,
Due to the elastic return action of the spring 27, the lever 2
3 rotates in the opposite direction to the direction of arrow b, and as a result, the lock plate 26 protrudes in the locking direction (direction of arrow a shown in FIG. 7) and engages with the locking hole 25 of the opposing lower rail 17. The lock state is maintained.

In this manner, in the embodiment described above, the lock plate 26 is slid only by the rotational movement about the longitudinal direction of the lever 23, so that the operation of the lever 23 is extremely small compared to the prior art. Therefore, it is only necessary to secure a space at the bottom of the seat cushion 22 to accommodate one lever 23, and the entire seat slide device S becomes smaller.
The height of the seat cushion 22 can be lowered or the space can be used for other purposes. Further, as shown in FIG. 8, the lever 23 can be operated simply by slightly rotating the lever 23, so the operation is extremely simple.

In addition, in this embodiment, the two rear ends of the lever 23 are fitted and supported by the support parts 29a and 29b of the bracket 15, which not only ensures the strength but also prevents the lever from being damaged by vibrations of the vehicle body or the like. There is no possibility that 23 may become loose.

Furthermore, since the three locking pawls 32 provided at the tip of the lock plate 26 are engaged with the locking hole 32, the fixation to the upper rail 20 is ensured, and there is no risk of the seat shifting in the front-rear direction. Nor.
In addition, in the present invention, the through hole provided in the lever 23 may be a through hole passing through the center of the lever 23 in addition to the groove 37.

(6) Effects of the invention As explained above, according to the seat slide locking device according to the present invention, since the lever can be disposed in a narrow space, the entire seat slide device can be made smaller and lighter. , lever operation becomes easy, and the seat position can be easily adjusted. Further, the support strength of the lever is also increased compared to the conventional lever. Furthermore,
According to the locking device of the present invention, when one end of the spring is to be locked between the lever and the lock plate, one end of the spring is used as a pin without using a locking pin or the like. The number of parts can be reduced, the weight can be reduced, and since no pins will fall out, support can be ensured.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a conventional locking device for a seat slide, Fig. 2 is a sectional view taken along the line taken in Fig. 1, and Fig. 3 is a perspective view of a seat slide device equipped with a locking device according to the present invention. , FIG. 4 is a perspective view of the slide rail equipped with a locking device, FIG. 5 is a plan view of the slide rail, and FIG.
A line sectional view, FIG. 7 is a line sectional view in FIG. 5,
FIG. 8 is a sectional view similar to FIG. 7 showing the lock plate in a detached state. L...Lock device, 1,17...Lower rail,
2, 20... Upper rail, 10, 25... Locking hole, 15... Bracket, 23... Lever, 26
... Lock plate, 27 ... Spring, 37
... split groove (penetrating part), 38 ... one end rod-shaped part (one end), 40 ... other end.

Claims (1)

[Scope of utility model registration request] In a seat slide device comprising a lower rail having a substantially U-shaped cross section with a plurality of locking holes, an upper rail slidably attached to the lower rail, and a locking device attached to the upper rail, the locking device is fixed to the upper rail. a lever arranged substantially parallel to the upper rail and rotatably supported by the bracket; and a lever supported by the bracket so as to be slidable in a direction substantially perpendicular to the longitudinal direction of the lower rail, and the lever is rotatably supported. a lock plate that engages and disengages from the locking hole of the lower rail when A locking device for a seat slide, comprising: a spring that constantly biases a lock plate in a locking direction;