JPH07349Y2 - Slide mechanism for vehicle seats - Google Patents

Description

[Detailed Description of the Invention] << Industrial Application Field >> The present invention relates to a vehicle seat slide mechanism for sliding a vehicle seat in the front-rear direction, and particularly when the height of the floor surface of the vehicle is different between left and right. The present invention relates to a vehicle seat slide mechanism that is suitable for.

<< Prior Art >> A general passenger vehicle is equipped with a slide mechanism that slides a vehicle seat in the front-rear direction, and this slide mechanism incorporates a locking device that positions and locks the seat at an appropriate position.

FIG. 5 schematically shows the structure of a conventional slide mechanism. In the drawing, a lower rail 3 is fixed on a floor surface 1 of a vehicle body via legs 2 and fixed to a lower surface of a seat cushion (not shown). The upper rail 4 is slidably attached to the lower rail 3.

The lock device 5 is provided inside each of the left and right rails. As shown in FIG. 6, the locking device 5 has a front end connected to the upper rail 4 and a connecting portion 6a.
The rockable rocking member 6 is connected and supported on the basis of
The rear end of the lock member 6 is engaged with the lower rail 3 by engaging the locking claw 3a provided on the lower rail 3 with the locking hole 6b of the lock member 6.

The lock member 6 is biased by the spring member 7 in the lock direction, that is, upward.

Further, in order to slide the seat, by pulling up the operation lever 8 connected to the left and right lock members 6, the rear end side of the lock member 6 is swung downward, and the lower rail 3 and the upper rail 4 by the lock member 6 are swung downward. It is configured to release the locked state with.

<< Problems to be Solved by the Invention >> However, the above-described slide mechanism has the operation lever 8
The lock devices 5 on the left and right sides are unlocked at the same time by pulling up the vehicle. There is no problem when the floor surface of the vehicle is horizontal, but there is a step on the floor surface and the floors on the left and right sides. When the surface height is different, the height dimension of the leg 2 is adjusted, but it is difficult to secure the strength of the leg 2 and the strength of the leg 2 is not required to be secured. There was an urgent need to develop a slide mechanism that can be laid out on a stepped floor.

The present invention has been made in view of the above circumstances, and an object of the present invention is to utilize a principle of a cam so that a floor surface having a step on the left and right can be formed without taking measures against the strength of the legs. An object is to provide a vehicle seat slide mechanism that can be laid out.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention provides a lower rail fixed to a floor surface of a vehicle and a seat cushion,
An upper rail slidable with respect to the lower rail and the upper rail, one end side of which is connected and supported,
A lock arm, the other end of which engages with the lower rail, a drawer-type operation lever installed on the front side of the lower part of the seat, and a rear end of the operation lever, which abuts on the cam receiving surface of the lock arm and locks the lower arm. And a cam that swings in a direction to release the engagement with.

<Operation> As is apparent from the above configuration, when the operation lever is pulled toward the front side, the lock arm swings downward due to the sliding motion of the cam, and the engagement between the rear end of the lock arm and the lower rail is caused. When released, the upper rail can be slid with respect to the lower rail.

<Example> Hereinafter, an example of a vehicle seat slide mechanism according to the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a slide mechanism according to the present invention. The slide mechanism 10 includes a pair of left and right lower rails 30 fixed to a floor surface 20 by legs 21 and slidably mounted on the lower rails 30. The upper rail 40 and the locking device 50 that locks the lower rail 30 and the upper rail 40 to positionally lock the seat at a desired position.

By the way, since there is a step 22 on the floor surface 20 of the vehicle that is the layout object of the slide mechanism 10, the heights of the left and right rails 30 and 40 and the height position of the lock device 50 are different.

Therefore, in the present invention, the locking device with different left and right height positions is used.
In order to accommodate 50, the operation lever 51 is moved not by a rotating method but by a withdrawal method, and a step portion 52 is formed on the operation lever 51 to solve this problem.

Next, the relationship between the operating lever 51 and the lock portion will be described with reference to FIGS. 2 and 3.

First, the structure of the lock device 50 will be described. The cut-and-raised piece 41 formed on the upper rail 40 is inserted into the triangular hole 54 formed on the front end side of the lock arm 53, and the front end of the lock arm 53 is moved to the upper rail 40. And the rear end side of the lock arm 53 is swingable with this connecting portion as a base point.

Further, an engaging hole 55 is provided at the rear end of the lock arm 53, and a plurality of locking claws 31 formed along the longitudinal direction of the lower rail 30 are engaged with the engaging hole 55, The lock arm 53 is biased in the engagement direction by the spring 56, and the upper rail 40 and the lower rail 30 are locked via the lock arm 53.

And a cam that slides on the upper surface of this lock arm 53
A cam member 57 forming 57a is attached to the rear end of the operation lever 51 described above, and this cam member 57 is pulled rearward by a spring 58.

More specifically, the cam member 57 is driven by the spring force of the spring 58.
Are in the positions shown in FIGS. 2 and 3, and in this state, the cam 57a of the cam member 57 is located in the recess 53a on the upper surface of the lock arm 53.

The present invention is configured in this way. To unlock and slide the seat, pull out the operation lever 51 to the front side, and as shown in FIG. 4, the cam member 57 will move to the right in the figure. Moving in the direction, the cam 57a of the cam member 57 slides along the cam receiving surface 53b of the lock arm 53, and pushes down the lock arm 53, and the locking claw 31 of the lower rail 30 and the lock arm 53. The engagement with the engagement hole 55 is released, and the upper rail 40 can freely slide with respect to the lower rail 30.

When the operator releases the operating lever 51, the spring force of the spring 58 causes the operating lever 51 and the cam member 57 to retract,
The lock arm 53 swings upward and engages the locking claws of the lower rail 30.
The 31 and the engaging hole 55 are engaged with each other and locked again.

The operation lever 51 is held by a guide member 59 provided on the upper rail 40 so as to be movable back and forth.

<Effects of the Invention> As described above, the sliding mechanism for the vehicle seat according to the present invention unlocks the locked state by swinging the lock arm via the cam by pulling out the operation lever. Even if the installation heights of the left and right locking devices are different, it can be dealt with by only providing a step on the operation lever, so that the sliding mechanism for the vehicle seat can be easily laid out on the floor surface with a step on the left and right.

Therefore, unlike the prior art, it is not necessary to adjust the leg size or take measures for strength to cope with a floor surface having a step, which brings about an effect of significantly reducing the cost.

Further, even if a large step is set on the floor surface, the lock device of the present invention effectively functions, which has an effect of improving the degree of freedom in designing the floor surface shape of the vehicle body.

[Brief description of drawings]

FIG. 1 is a perspective view showing a slide mechanism according to an embodiment of the present invention, FIG. 2 is a perspective view showing the structure of a lock device in the slide mechanism, and FIG. 3 is a side view showing the lock device in a locked state. FIG. 4 is a side view showing the lock device in the unlocked state, FIG. 5 is a perspective view showing a conventional slide mechanism, and FIG. 6 is a side view showing a conventional example of the lock device of the slide mechanism. . 10 …… Slide mechanism, 20 …… Floor, 22 …… Step, 30 ……
Lower rail, 40 …… Upper rail, 50 …… Locking device,
51 …… Operating lever, 53 …… Lock arm, 53b …… Cam receiving surface, 57a …… Cam.

Claims (1)

[Scope of utility model registration request] 1. A lower rail fixed to a floor surface of a vehicle, an upper rail fixed to a seat cushion and slidable with respect to the lower rail, one end of which is connected and supported by the upper rail and the other end of which is engaged with the lower rail. A lock arm to be fitted, a pull-out type operation lever installed on the front side of the lower part of the seat, and a rear end of the operation lever, which come into contact with the cam receiving surface of the lock arm to release the engagement of the lock arm with the lower rail. A sliding mechanism in a vehicle seat, comprising: a cam that swings in a direction in which the vehicle slides.