JPH0228982Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a seat slide adjuster for front seats of automobiles, etc.

2. Description of the Related Art Conventionally, a seat slide adjuster that allows a front seat to be moved in the longitudinal direction is configured as shown in FIGS. 1 and 2, for example.

In the figure, 1 and 1 are lower rails fixed to the floor, and 2 and 2 are upper rails attached to the seat 3. The upper rails 2, 2 are fitted into the lower rails 1, 1 so as to be slidable in the front and rear direction,
By locking one of the upper rails 2 to the lower rail 1 at an arbitrary position, the seat 3 can be fixed at an arbitrary position. That is, one of the lower rails 1 has an open cross section at the upper part and its ends are bent outward to form the flanges 4, 4, and the upper rail 2 has an open cross section at the lower part and its ends are opposed to form the flanges 4, 4. It has bent portions 5, 5 which fit into each other. A plurality of engagement recesses 6 are provided in one of the flange portions 4 in the longitudinal direction of the lower rail 1, and a lock plate 7 is provided in the upper portion of the upper rail 2. A pivot portion 8 at one end of the lock plate 7 is rotatably supported in the vertical direction in a mounting hole 9 of the upper rail 2, and an engaging pawl 10 at the other end passes through a through hole 11 of the upper rail 2 to engage the lock plate 7. It is designed to selectively engage with the mating recesses 6. This lock plate 7 is always pushed downward by a biasing spring 12, that is, when the engaging claw 1
0 is biased in the direction of engagement with the engagement recess 6, and by rotating the lock plate 7 upward by the lock release lever 13 provided on the lock plate 7, the lock is released and the upper rail is released. 2 can slide against the lower rail 1.

However, in the conventional structure described above, since the operating direction of the lock/unlock lever 13 matches the sliding direction of the upper rail 2, the engaging pawl 10 engages the engaging recess 6 while drawing an arcuate locus in the vertical direction. Disconnect. Therefore, the engagement recess 6 is connected to the engagement claw 1.
It is necessary to make the width sufficiently wider than the width of the engaging claw 1.
Even if the upper rail 2 is engaged with the engagement recess 6 and locked, there is a drawback that the upper rail 2 may wobble in the front-rear direction. Further, since the bent portions 5, 5 of the upper rail 2 are simply fitted to the collar portions 4, 4 of the lower rail 1, there is a large frictional resistance, and there is a drawback that the seat 3 cannot be smoothly slid in the longitudinal direction.

This idea was made with attention to the above circumstances, and its purpose is to allow the seat to slide smoothly in the front and rear directions, and to prevent rattling when the upper rail is locked in the desired position relative to the lower rail. The object of the present invention is to provide a seat slide adjuster that can be reliably locked at a desired position and that also ensures reliable operation of the lock plate.

This invention will be explained below based on an embodiment shown in the drawings. In FIGS. 3 to 7, 21 is a lower rail, and 22 is an upper rail. lower rail 2
1 has a substantially U-shaped cross section with an open top, and its end portions 23, 23 are bent inwardly and face each other. And this one terminal section 23
A plurality of engagement recesses 24 are provided in the longitudinal direction of the lower rail 21. Further, the upper rail 22 has a substantially U-shaped cross section with its lower part open, and is fitted into the lower rail 21 from the upper part. The end portions 25, 25 are bent inwardly and engaged with the bottom of the lower rail 21. Furthermore, arc-shaped guide grooves 26, 26 are formed in the outer wall of the lower rail 21 and the inner wall of the upper rail 22, and are opposed to each other.
A plurality of steel balls 2 are arranged between these guide grooves 26, 26.
7... are rotatably interposed. The upper rail 22 can smoothly slide forward and backward relative to the lower rail 21.

Further, a lock plate 28 is provided at the upper portion of the upper rail 22 located approximately in the middle in the longitudinal direction. This lock plate 28 is formed by bending a metal plate.
It is located in the direction perpendicular to 2. A hook-shaped pivot 29 is provided at the tip of the lock plate 28.
As shown in FIG. 7, this pivot portion 29 has a tongue piece 30 formed at the center in the width direction. This tongue piece 30 is connected to the above-mentioned Atsupararu 2.
The lock plate 28 is deeply inserted and engaged into an engagement hole 31 formed in a convex portion 22a formed on one side of the lock plate 28.
is adapted to rotate in the vertical direction using this pivot portion 29 as a fulcrum. Further, an engaging pawl 32 is formed at the base end of the lock plate 28 by cutting and raising the upper surface downward, and the engaging pawl 32 passes through a through hole 33 formed in the upper rail 22 and passes through the above-mentioned It is designed to selectively engage with the engagement recesses 24 of the lower rail 21. Furthermore, a pair of protruding pieces 34, 34 are integrally provided in the middle part of the lock plate 28, and protrude downward into the lower rail 21 through long holes 35, 35 bored in the upper rail 22. ing. Further, on the lower side of the upper rail 22, a biasing spring 37 made of a wire spring is stretched in a direction perpendicular to the protruding pieces 34, 34, and both ends thereof are attached to the mounting holes 36, 36 of the upper rail 22. And this biasing spring 37
The middle portions of the protruding pieces 34, 34 are engaged with notches 38, 38 provided in the protruding pieces 34, 34, respectively. Therefore, the lock plate 28 is always held downward by the biasing spring 37.
That is, the engagement claw 32 is biased in the direction of engagement with the engagement recess 24 . Further, a lock release lever 39 is provided at the base end of the lock plate 28 and projects diagonally upward. When the lock release lever 39 is pressed in the direction of arrow A with a finger, the lock plate 28 is released. The engagement claw 32 is rotated upward about the pivot 29 as a fulcrum against the restoring force of the spring 37, and the engagement claw 32 is pulled out of the engagement recess 24 to be unlocked.

Then, by pressing the lock release lever 39 in the direction of arrow A to release the lock, and sliding the seat (not shown) in the front and back direction, the upper rail 22 smoothly slides with respect to the lower rail 21. . When the lock release lever 39 is released at a desired position, the lock plate 28 is rotated downward by the restoring force of the biasing spring 37, and the engagement claw 32 is engaged with the engagement recess 24. Locked.

At this time, since the engaging claw 32 engages and disengages from the engaging recess 24 in the vertical direction, the engaging claw 32 engages only by making the width slightly narrower than the engaging recess 24, and in the locked state, the upper rail 22 There is no wobbling in the front or rear direction.

As explained above, according to this invention, since the steel balls are interposed between the lower rail and the upper rail, the upper rail can be slid smoothly in the front and rear directions. Moreover, since the lock plate is rotated vertically in a direction perpendicular to the sliding direction of the upper rail, the engaging pawl engages and disengages from the engaging recess in the vertical direction. There is no need to provide a margin for engagement, and this has the effect of preventing rattling in the locked state. Furthermore, since the lock plate is inserted and engaged with the engagement hole of the convex part formed on the lower rail,
Since the pivot portion is deeply engaged, the pivot portion does not come off when the lock plate is operated, and the lock plate operates smoothly.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a conventional seat support state, Fig. 2 is a perspective view showing a conventional seat slide adjuster, and Figs. 3 to 7 show an embodiment of the seat slide adjuster of this invention. It shows,
Fig. 3 is a perspective view, Fig. 4 is a sectional view taken along the line of Fig. 3, Fig. 5 and Fig. 6 are action explanatory diagrams, Fig. 7
The figure is a perspective view of main parts. 21...Lower rail, 22...Atsupa rail,
22a...Protrusion, 24...Engagement recess, 27...Steel ball, 28...Lock plate, 31...Engagement hole,
32... Engaging claw, 34... Projecting piece, 37... Biasing spring, 38... Notch.

Claims (1)

[Scope of utility model registration request] The seat slide adjuster consists of a lower rail fixed to the floor and an upper rail installed under the seat, and the upper rail is supported on the lower rail so as to be slidable in the longitudinal direction. A lower rail having a plurality of engagement recesses extending in the longitudinal direction of the lower rail at one end, an upper rail having an open cross section at the bottom and slidably fitted to the lower rail via a steel ball, and one side of the upper rail. a protrusion formed in the upper rail, an engagement hole formed in the protrusion along the longitudinal direction of the upper rail, a lock plate disposed on the upper part of the upper rail in a direction perpendicular to the sliding direction thereof, and one side of the lock plate. A pivot portion formed at the end of the lock plate is bent downward and inserted into the engagement hole, and a pivot portion formed at the other end of the lock plate is bent downward and selectively engaged with and disengaged from the engagement recess of the lower rail. a protruding piece extending from the lock plate into the cross section of the upper rail and having a notch in which a biasing spring disposed within the upper rail is engaged; A seat slide adjuster configured to be freely rotatable around a pivot portion, and wherein the lock plate is biased by a biasing spring in a direction in which an engaging pawl is engaged with an engaging recess. Star.