JPH0228981Y2 - - 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 present invention aims to provide a seat slide adjuster that can be reliably locked in a desired position.

This invention will be explained below based on an embodiment shown in the drawings. In FIGS. 3 to 6, 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 into a U-shape with an open section at the bottom, and is located in a direction perpendicular to the upper rail 22. And this lock plate 28
A hook-shaped pivot portion 29 is provided at the tip of the pivot portion 29, and an arcuate portion 30 at the tip of the pivot portion 29 engages with a slit 22a bored on one side of the upper rail 22, and projects from the upper surface of the upper rail 22. It is rotatably supported on a contact plate 31 provided therein. 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 this engaging pawl 32 is connected to a through hole bored in the upper rail 22.
3 to the engagement recess 24 of the lower rail 21.
It is designed to selectively engage with... Furthermore, a pair of protruding pieces 34, 34 that protrude downward are integrally provided in the middle part of the lock plate 28.
This is the long hole 3 drilled in the above upper rail 22.
5 and 35 and protrudes into the lower rail 21. 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. The midway portion of this biasing spring 37 is connected to the protruding pieces 34, 3.
It is locked in notches 38, 38 provided in 4. Therefore, the lock plate 28 is always urged downward by the urging spring 37, that is, in the direction in which the engaging claw 32 engages with the engaging 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. Seibane 3
The engagement claw 32 is rotated upward about the pivot portion 29 as a fulcrum against the restoring force of the engagement claw 32, and the engagement claw 32 is pulled out from the engagement recess 24, and the lock is released.

However, 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 slides smoothly 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 back 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-rear direction. Moreover, since the lock plate is rotated up and down in a direction perpendicular to the sliding direction of the upper rail, the engagement pawl engages and disengages from the engagement recess in the vertical direction, so that the engagement pawl and the engagement recess are There is no need to provide a margin for engagement, and rattling in the locked state can be prevented. Furthermore, since the pivot portion of the lock plate is engaged by the slit of the upper rail and the abutment plate, the arcuate portion of the pivot portion smoothly contacts the abutment plate when the lock plate is operated. There is little resistance and a good operating feeling is obtained, and the pivot part of the lock plate engages with the slit of the upper rail, so when operating,
It does not come off from the top rail even when it is not in operation, and has excellent durability.

[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 6 show an embodiment of the seat slide adjuster of this invention. It shows,
3 is a perspective view, FIG. 4 is a sectional view taken along the line of FIG. 3, and FIGS. 5 and 6 are explanatory views of the operation. 21...Lower rail, 22...Atsupa rail,
24... Engaging recess, 27... Steel ball, 28... Lock plate, 32... Engaging pawl, 22a... Slit, 29... Pivotal portion, 31... Contact plate.

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 with a plurality of engagement recesses provided in the longitudinal direction of the lower rail at one end, an upper rail with an open cross section at the bottom and slidably fitted to the lower rail via steel balls, and one side of the upper rail. a contact plate located above the slit and arranged on the upper surface of the upper rail; a lock plate arranged on the upper part of the upper rail in a direction perpendicular to the sliding direction thereof; an arcuate pivot formed at one end and bent downward to engage the slit and abut against the abutting plate; The lock includes an engaging pawl that is inserted into the upper rail and selectively engages and disengages from the engaging recess of the lower rail, and a spring that biases the lock plate in a direction in which the engaging pawl is engaged with the engaging recess. A seat slide adjuster characterized in that a plate is configured to be rotatable around the pivot portion.