JP2005212518A - Vehicle seat slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a backlash prevention mechanism for inserting a stopper member of a wedge body into a roller in order to prevent backlash of an upper rail with respect to a lower rail in a locked state. There arises a problem that the stopper member does not come off from the roller or a sufficient insertion cannot be obtained.
A backlash prevention mechanism (5) has a reinforcement (21) that moves back and forth by a leaf spring (19), and in a locked state, the tongue (22) of the reinforcement (21) is moved to a sliding portion (7). It is possible to move along the taper surface (18) provided on the bottom (13) of the base plate, the tongue piece (22) is strongly pressed against the end surface (16) of the flange (12) of the lower rail (2), and both rails (2, 3) Prevent backlash between them.
[Selection] Figure 3

Description

  The present invention relates to a vehicle seat slide device that enables a seat-side upper rail to be locked via a backlash prevention mechanism with respect to a vehicle-side lower rail.

The vehicle seat slide device makes the upper rail slidable in the longitudinal direction (vehicle longitudinal direction) with respect to the lower rail fixed to the floor of the vehicle, and allows the seat supported by the upper rail to move to a desired position. ing. After the seat is moved to a desired position, the upper rail is locked to the lower rail using a lock mechanism.
The lock mechanism has a configuration in which a latch member supported on the upper rail side is engaged with a lock hole provided in the lower rail.

  Even if the upper rail is locked with respect to the lower rail using the locking mechanism described above and the seat is fixed (locked) at a predetermined position, the bearing is rotatably mounted on the upper rail, and the bearing inserted so as to roll with the lower rail is on the upper side. Since it is necessary to provide a gap for smooth rolling, the seat will rattle in the vertical direction, giving the passengers an uncomfortable feeling.

Japanese Patent Laid-Open No. 10-1000075

In order to prevent the rattling between the latch member and the lock hole, a wedge-shaped stopper member is inserted between the slide roller and the lower rail to prevent the upper rail from rattling with respect to the lower rail.
However, it is difficult to control the biting strength of the stopper member between the slide roller and the lower rail. If the biting is too strong, the stopper member cannot be returned and the sheet cannot be moved to a predetermined position. Become. Also, if the bite is too weak, it will not be possible to prevent rattling.

Although the stopper member is arranged with respect to the left and right rails, it is difficult to make the amount of biting of the stopper member the same on the left and right, which is almost impossible in reality. On the one hand, the stopper member bites strongly between the slide roller and the lower rail, and on the other hand, a loose bite with backlash occurs.
Further, the biting operation of the stopper member is controlled by the vertical movement of the lock lever. However, a mechanism for ensuring a large movement of the stopper member with respect to a small movement of the lock lever becomes complicated.

  Therefore, this invention makes it the subject which should be solved to eliminate the malfunction of the prior art mentioned above.

In order to solve the above-described problems, the present invention has a configuration in which the tongue piece of the reinforcement is movable up and down along the tapered surface provided on the upper rail, and the tongue piece is brought into contact with the end surface of the lower rail facing the tongue piece. adopt.
The contact of the tongue piece with the lower rail prevents the upper rail from rattling with respect to the lower rail. That is, the tongue piece is sandwiched between the end surface of the lower rail and the tapered surface to prevent the relative movement of both rails.

  According to the present invention, the lower rail that is fixed to the floor of the vehicle, the upper rail that is slidable along the longitudinal direction of the lower rail and that supports the seat, and the upper rail is locked and unlocked to the lower rail. In a vehicle seat slide device having a locking mechanism and a rattling prevention mechanism for preventing rattling of the upper rail with respect to the lower rail, the lower rail is integrated with the main body having a substantially U-shaped cross section and the opposing side wall of the main body, and a downward flange is provided. A pair of engaging portions having a substantially L-shaped cross section, and an upper rail having a pair of sliding portions having a substantially U-shaped cross section surrounding each flange of the lower rail, and a rattling prevention mechanism comprising an elastic body and an elastic body Reinforce fixed at least at one end, and the reinforce includes a tongue piece extending in the direction of the sliding portion of the upper rail, and is locked A vehicle seat characterized in that the structure has an insertion piece inserted into an opening provided in the locking portion and the sliding portion, and the upper rail has a tapered surface that presses the tongue piece against the end surface of the lower flange of the lower rail. A sliding device is provided.

According to the present invention, since the movement of the reinforce is obtained using the elastic body, the operation in the unlocking direction of the lock lever returns the reinforce to the original position by the elastic body, and the unlocked state is released. Easy and secure.
There is no biting of the tongue into the lower rail, and there is no problem that the tongue cannot be released.

  The vehicle seat slide device 1 includes a lower rail 2 fixed to the floor of the vehicle, an upper rail 3 that is slidable in the vehicle front-rear direction with respect to the lower rail 2 and supports a seat (not shown), and an upper rail 3. A locking mechanism 4 that locks or unlocks the lower rail 2 and a rattling prevention mechanism 5 that prevents the upper rail 3 from rattling against the lower rail 2 are provided.

The lower rail 2 has a main body 6 having a substantially U-shaped cross section and a pair of locking portions 7 having a substantially inverted L-shaped cross section provided at the tip of the opposing side wall of the main body 6.
The upper rail 3 has a main body 8 having a substantially inverted U-shaped cross section and a pair of sliding portions 9 having a substantially U-shaped cross section integrally provided at the lower end of the opposite side wall of the main body 8.
As shown in FIGS. 3 and 4, a shoe 10 and a bearing 11 are arranged between the rails 2 and 3 to ensure smooth sliding of the upper rail 3 with respect to the lower rail 2.

The end face 16 of the downward flange 12 of the locking portion 7 of the lower rail 2 is separated from and opposed to the bottom portion 13 of the sliding portion 9 of the upper rail 3.
The lock mechanism 4 has an insertion piece 15 that rotates around a shaft 14 by an operation lever (not shown). As shown in FIG. 2, when both rails 2 and 3 are locked, the insertion piece 15 is inserted into the opening provided in the sliding portion 9 and the locking portion 7 to prevent relative movement of the rails 2 and 3. .

  As shown in FIGS. 7 and 8, a cut portion 17 is provided at an appropriate position on the bottom portion 13 of the sliding portion 9 of the upper rail 3, and a tapered surface 18 is formed on a part of the lower wall surface of the cut portion 17.

With reference to FIG. 5, the rattling prevention mechanism 5 will be described. The rattling prevention mechanism 5 includes a leaf spring 19 as an elastic body and a reinforcement 21 fixed to both ends of the leaf spring 19.
The leaf spring 19 as an elastic body is composed of a substantially U-shaped main body that forms ridges 20 on both sides, and the reinforcement 21 is composed of a substantially U-shaped section that opens downward, with a pair of spaced apart portions facing each other. The tongue piece 22 is provided. Notches are provided on both sides of the tongue piece 22.
The peak portion 20 is inclined such that the top portion is lowered to the outdoor side, and the opposite side wall of the peak portion 20 is also inclined in the front-rear direction.

The backlash prevention mechanism 5 is arranged between the opposing side walls of the main body 8 of the upper rail 3, and as shown in FIG. 6, in the unlocked state, the front and rear insertion pieces 15 are in contact with the inner side of the peak portion 20 of the leaf spring 19, As shown in FIG. 8, the tongue piece 22 stands by in front of the tapered surface 18 and occupies a position facing the end surface 16 of the locking portion 7.
In order to obtain the locked state, when the lock mechanism 4 is operated and the insertion piece 15 is inserted into the opening of the locking portion 7 and the sliding portion 9, the front and rear insertion pieces 15 cause the peak portion 20 of the leaf spring 19 to extend in the front-rear direction. Push (see FIG. 1) and push out the reinforcement 21 in the front-rear direction. As shown in FIG. 7, the movement of the reinforcement 21 causes the tongue piece 22 to rise along the tapered surface 18 and press the tongue piece 22 against the end face 16 of the flange 12. The strong pressing of the tongue piece 22 against the end face 16 eliminates the gap above the bearing 11 and prevents the upper rail 3 from rattling against the lower rail 2.

  When the locked state is changed to the unlocked state, the contact between the insertion piece 15 and the peak portion 20 is released, and the peak portion 20 returns to the unlock position in FIG. The restoration of the peak portion returns the reinforcement 21 to the direction of the leaf spring 19 by the urging force of the leaf spring 19, and the tongue piece 22 occupies the position shown in FIG. The upper rail 3 can slide with respect to the lower rail 2, and the seat can be moved to a desired position.

It is the front view which made the upper rail lock state with respect to a lower rail. It is sectional drawing seen from the arrow II-II of FIG. It is sectional drawing seen from the arrow III-III of FIG. It is sectional drawing seen from the arrow IV-IV of FIG. It is a perspective view of a rattling prevention mechanism. It is a front view of the upper rail in an unlocked state. It is a fragmentary sectional view which shows the position of the tongue piece in a locked state. It is a fragmentary sectional view which shows the position of the tongue piece in an unlocked state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle seat slide apparatus 2 Lower rail 3 Upper rail 4 Lock mechanism 5 Backlash prevention mechanism 6,8 Main body 7 Locking part 9 Sliding part 12 Flange 13 Bottom part 15 Insertion piece 16 End surface 18 Tapered surface 19 Plate spring (elastic body)
20 Yamabe 21 Reinforce 22 Tongue

Claims (6)

A lower rail fixed to the floor of the vehicle, an upper rail that is slidable along the longitudinal direction of the lower rail and supports the seat, a lock mechanism that locks and unlocks the upper rail to the lower rail, and the upper rail In a vehicle seat slide device having a rattling prevention mechanism for preventing rattling of the lower rail, the lower rail has a substantially U-shaped cross section, and a substantially inverted L-shaped cross section having a downward flange integrated with the opposing side wall of the main body A pair of sliding portions, and the upper rail has a pair of sliding portions having a substantially U-shaped cross section surrounding each flange of the lower rail,
The backlash prevention mechanism has an elastic body and a reinforcement fixed to at least one end of the elastic body, the reinforcement includes a tongue piece extending in the direction of the sliding portion of the upper rail, and the locking mechanism slides on the locking portion. Having an insertion piece to be inserted into the opening provided in the moving part;
The vehicle seat slide device, wherein the upper rail has a tapered surface that presses the tongue piece against an end surface of the lower flange of the lower rail.   2. The insertion piece according to claim 1, wherein when the insertion piece of the locking mechanism is inserted into the opening of the locking portion and the sliding portion, the insertion piece slides the reinforcement through the elastic body to bring the tongue piece into contact with the end face of the flange. Vehicle seat slide device.   The vehicle seat slide device according to claim 2, wherein notches are provided on both sides of the tongue piece.   The vehicle seat slide device according to claim 3, wherein a tapered surface is provided in the locking portion.   The vehicle seat slide device according to claim 4, wherein the reinforcement is provided on both sides of the elastic body, and at least two tongue pieces of the reinforcement are provided on both sides thereof. 6. The vehicle seat slide device according to claim 5, wherein the elastic body is a substantially U-shaped leaf spring, and the insertion piece of the locking mechanism makes the opposing side wall of the leaf spring elastically deformable in the longitudinal direction of the upper rail.

Images