JPH0321300Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a seat slide device for adjusting the longitudinal position of a vehicle seat.

"Prior Art and its Problems" A vehicle seat is supported on left and right seat tracks consisting of a lower rail and an upper rail. One of the left and right seat tracks is provided with a row of lock holes on its lower rail side, and a lock lever that engages and disengages with one of the lock holes of the lock plate and its operating mechanism are provided on its upper rail side. This row of lock holes, the seat track on the side having the lock lever and its operating mechanism constitute the seat slide device to which the present invention is directed.

The lock hole rows are sometimes formed on a lock plate that is a separate member from the lower rail, or directly on the lower rail, but in both conventional devices, the lock hole rows are exposed inside the left and right seat tracks. was. In other words, when forming a lock plate, the row of lock holes protrudes inside the left and right seat tracks when it is fixed to the lower rail, and when forming a row of lock holes directly on the lower rail, it should be provided on the inner wall of the lower rail. Therefore, it is exposed as well. For this reason, especially in a two-door vehicle, when the seat is slid to the forward position using a walk-in mechanism or the like, the rear part of this row of lock holes is exposed, which is undesirable in terms of appearance. In order to solve this problem in conventional products, the lock plate is covered with a synthetic resin cover, but
This cover increases the number of parts and assembly man-hours.

In addition, the operating mechanism of the conventional seat slide device is
The lock lever is rotated by an operating lever that rotates around an axis in the longitudinal direction of the vehicle, and the operating part of the operating lever is located at the front of the bottom of the seat, which may cause shocks such as collisions. There was also a safety issue in that the occupant's foot could end up pushing up the operating lever, causing the lock to be released.

``Purpose of the invention'' The present invention solves the problems of the conventional seat slide device described above, and is a device in which the row of lock holes provided on the lower rail side is not exposed even when the seat is moved to the forward position. The purpose is to obtain. Another object of the present invention is to provide a seat slide device that is less likely to be unlocked even when an occupant's foot or the like is forced to lift the operating lever due to a shock such as a collision.

"Summary of the invention" The seat slide device of the present invention is a seat slide device of a type in which a row of lock holes is formed directly on a part of the lower rail, in which the widthwise center of the lower wall of the lower rail is bent downward to protrude. It is characterized in that a lock edge extending downward and longitudinally is integrally bent at the center of the lower part of the lower rail, and a row of lock holes is formed in this lock edge. According to this configuration, the lock edge and the lock hole row are
Since it is hidden by the upper part of the lower rail, it cannot be seen even if the seat slide device is viewed from above in its normal state. In addition, the problem of the lock being released inadvertently can be solved by setting the rotation axis of the control lever vertically and allowing the control lever to rotate horizontally.
It can be solved.

``Embodiments of the invention'' The invention will be described below with reference to illustrated embodiments. FIG. 1 shows an exploded view of the seat slide device of the present invention, where 11 is a lower rail, and 12 is an upper rail that is slidably attached to the upper side of the lower rail 11. As clearly shown in FIG. 2, the lower rail 11 has a lower wall 11a, left and right side walls 11b, and a retaining wall 11c formed by bending the upper ends of the side walls 11b outward, and further includes a lower wall 11a. A lock edge 11d, which is a feature of the present invention, is integrally formed in the center. This lock edge 11d is formed by bending the center part of the lower wall 11a downward into a U-shape, and the folded wall surface 11d
e are in close contact with each other. This folded wall 1
1e can be spot welded, for example, at the welding position indicated by the symbol W in FIG. The number of welding locations can be increased or decreased as appropriate. The lock hole array 12 is bored through both folded wall surfaces 11e of the lock edge 11d.

The upper rail 13 is symmetrical to the lower rail 11 and includes an upper wall 13a, left and right side walls 13b, and a retaining wall 1 in which the lower end of the side wall 13b is bent outward.
It has 3c. Several rollers 14 are inserted between the upper surface of the lower wall 11a of the lower rail 11 and the lower surface of the upper wall 13a of the upper rail 13, and balls 15 are inserted between the lower surface of the retaining wall 11c and the upper surface of the retaining wall 13c. The lower rail 11 and the upper rail 13 are slidable relative to each other.

According to the above configuration, the width d of the lock edge 11d
(FIG. 2) is sufficiently smaller than the width D of the lower wall 11a of the lower rail 11 (FIG. 2). Therefore, when the seat is slid to the forward position, the lock edge 1
1d and the lock hole row 12 are difficult to see and do not significantly impair the appearance.

FIG. 4 shows another embodiment of the present invention in which the shape of the lock edge 11d of the lower rail 11 is changed. In this embodiment, the folded wall surface 11e of the lock edge 11d is not brought into close contact with the folded wall surface 11e, and there is a distance l between the two.
A gap is provided. According to this embodiment, there is an advantage that the rigidity is increased against a moment applied perpendicularly to the longitudinal direction of the lower rail 11. On the other hand, the first embodiment better resists the force that tends to open the side walls 11b of the lower rail 11. In this embodiment, the lock hole array 12 is
Even if it is formed on both of the pair of folded wall surfaces 11e,
It may be formed only on the side of the lock lever 23 corresponding to the lock teeth 23a.

Next, the lock lever 23 supported on the upper rail 13 side and its operating mechanism will be explained. The upper wall 20a of the lock lever bracket 20 is fixed to the upper wall 13a of the upper rail 13 by welding at a welding position indicated by a swage pin 21 and the symbol W. The lock lever bracket 20 has a side wall 20b along the outer wall 13b of the upper rail 13, and a lock tooth guide hole 20c is bored below the side wall 20b.

A lock lever 23 is pivotally attached to the upper wall 20a of the lock lever bracket 20 by a vertical pivot pin 22. As shown in FIG. This lock lever 2
3 has lock teeth 23a formed at its lower part to engage with and disengage from the lock hole row 12, and a spring hook arm 23b formed at its rear side. Further, an operating lever 23c extending toward the front of the seat is fixed to the upper front part by welding or other means.
23d is an operation knob at the tip of the operation lever 23c. As shown in FIG.
c and protrudes toward the lock edge 11d.
Further, this lock tooth 23a is formed into a forked shape that fits into two lock holes at the same time.

A spring hanging bracket 25 is fixed on the upper rail 13, and a tension spring 26 is stretched between the spring hanging bracket 25 and the spring hanging arm 23b. This tension spring 26 has locking teeth 23.
The lock lever 23 is urged to rotate in the direction in which the lock lever 23 is fitted into the lock hole row 12.

Therefore, according to this operating mechanism, the lock teeth 23a are normally fitted into any two lock holes in the lock hole row 12 due to the force of the tension spring 26.
Movement of the upper rail 13 is prevented at that position. When the lock lever 23 is rotated by holding the operation knob 23d against the force of the tension spring 26, the lock teeth 23a are removed from the lock hole row 12, so that the upper rail 13, that is, the seat, can move freely. After adjusting the front and back position of the seat, turn the operation knob 2.
3d, the lock teeth 23a engage with the lock hole array 12 due to the force of the tension spring 26, so that the lock is locked at that position.

Since the lock lever 23 rotates around the vertical pivot pin 22, this operating mechanism can be operated by appropriately setting the direction of the operating lever 23c.
Even if an unexpected force is applied to the operating knob 23d due to a shock such as a collision, the lock lever 23 can be prevented from rotating. In other words, even if the operating lever 23 tries to kick up with the foot, since the lever is rotated horizontally, it is possible to avoid a situation where the seat lock is released in the event of a shock such as a collision, thereby improving safety. can.

In the illustrated embodiment, the operating lever 23c is made of a round bar, which is fixed to a plate material having lock teeth 23a, etc., but the entire operating lever 23c, including the operating lever 23c, may be made of a plate material. Also, lock tooth 23
Although a is assumed to be bifurcated, its shape is not limited.

``Effects of the invention'' As mentioned above, the seat slide device of this invention has the following advantages:
At the lower part of the lower rail, a center part in the width direction of the lower wall of the lower rail is bent and protruded downward, and a lock edge extending downward and in the longitudinal direction is integrally bent at the center of the lower part of the lower rail. Since the lock hole row is provided in the seat, the lock edge and the lock hole row are not exposed when the seat is slid to the forward position. Therefore, the appearance can be improved without impairing the appearance and without requiring a separate cover as in conventional devices. Furthermore, since the lock edge does not protrude to the left or right of the lower rail, the space under the seat is widened, and there is less chance of the rear seat occupant's feet hitting the lock edge. In addition, by setting the rotation axis of the operating lever of the operating mechanism in the vertical direction, the operating lever can be rotated in the horizontal direction, thereby preventing accidents such as accidental release of the lock by the occupant's foot in the event of a collision or other shock. It can be prevented and safety can be increased.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an embodiment of the seat slide device of the present invention, Fig. 2 is a sectional view taken along the line - - in Fig. 1 in the assembled state, and Fig. 3 is a -
4 is a sectional view similar to FIG. 2 showing another embodiment of the present invention. 1...Lower rail, 11a...Lower wall, 11d...
...Lock edge, 11e...Folding wall surface, 12...
Lock hole row, 13... Upper rail, 20... Lock lever bracket, 22... Rotation shaft pin, 2
3... Lock lever.

Claims (1)

[Claims for Utility Model Registration] (1) A lower rail having a lower wall and both side walls and fixed to the vehicle floor; A row of lock holes formed in a part of the longitudinal direction of the lower rail; an upper rail movably fitted and fixed to the seat; supported on the upper rail;
In the seat slide device, which includes a lock lever that engages and disengages from the row of lock holes, and an operating mechanism thereof, the widthwise center portion of the bottom wall of the lower rail is bent downward to protrude downward, and A seat slide device characterized in that a lock edge extending in the longitudinal direction is integrally formed and a row of lock holes is formed in the lock edge. (2) Claim 1 of the Utility Model Registration Claims: The seat slide device according to claim 1, wherein the operating lever of the operating mechanism for engaging and disengaging the lock lever from the lock hole of the lock plate is rotatable around a vertical rotation axis.