JP2002172959A - Seat sliding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat sliding device, causing no degradation of locking strength. SOLUTION: Projections 241, 243, 245, and 247 projecting in the parallel direction with a rotation plane of a lock lever 501 and sandwiching the tip side of the lock lever 501 are disposed near a lock hole 221 of an upper rail 200, and projections 441, 443, and 445 projecting in the parallel direction with a rotation plane of the lock lever 501 and sandwiching the intermediate part of the lock lever 501 are disposed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a lower rail provided on a floor side and having a plurality of lock holes formed in a longitudinal direction, a seat movably engaged with the lower rail, a seat provided, and a plurality of the lower rails. An upper rail having a lock hole facing the lock hole, a rotatable base end portion provided outside the upper rail, and a lock hole provided in the upper rail and the lower rail provided at a distal end portion. The present invention relates to a seat slide device having a lock lever formed with engageable teeth.

[0002]

2. Description of the Related Art A conventional seat slide apparatus will be described with reference to FIG. In the drawing, an upper rail 3 on which a seat is provided is movably engaged with a lower rail 1 provided on the floor side.

On the side surface of the lower rail 1, a plurality of lock holes 1a are provided in the longitudinal direction. On the other hand, three lock holes (not shown) facing the lock holes 1a of the lower rail 1 are formed on the side surface of the upper rail 3.

Further, a lock lever bracket 5 is fixed to the upper rail 3. The lock lever bracket 5 has a lock hole 5a facing the lock hole of the upper rail (not shown), and a lock lever 9 that rotates in the horizontal direction using a pin 7.

A lock hole 5 a of the lock lever bracket 5 and an upper rail 3
The teeth 9a which can be engaged with the lock holes (not shown) are formed.

The operation of the above configuration will be described. The state of FIG. 9,
That is, the teeth 9a of the lock lever 9 are locked with the lock holes 5a of the lock lever bracket 5 and the lock holes 1 of the lower rail 1.
a, The lower rail 1 is engaged with the lock hole of the upper rail 3.
The upper rail 3 is prohibited from moving.

Here, when the lock lever 9 is rotated in the direction of arrow I in the figure, the teeth 9a of the lock lever 9
Lock hole of upper rail 3 and lock hole 1 of lower rail 1
a, the upper rail 3 is disengaged from the lock hole 5a of the lock lever bracket 5, and the upper rail 3 can be moved with respect to the lower rail 1.

When the upper rail (seat) 3 is moved to a desired position and the lock lever 9 is rotated in the direction indicated by the arrow I, the teeth 9a of the lock lever 9 are locked by the lock holes 5a of the lock lever bracket 5, the lower rail 1 And the upper rail 3 is again engaged with the lock hole 1a and the lock hole of the upper rail 3 to return to the state where the movement of the upper rail 3 with respect to the lower rail 1 is prohibited.

[0009]

However, in the seat slide device having the above structure, when a gap is formed between the head 7a of the pin 7 and the lock lever 9,
Causes play in the axial direction (rotational axis direction) of the pin 7, and the teeth 9 a on the tip side of the lock lever 9 are locked into the lock hole 5 a of the lock lever bracket 5, the lock hole 1 a of the lower rail 1, and the lock hole of the upper rail 3. There is a problem that the engagement is incomplete, that is, the lock strength is reduced.

Also, when the lock lever 9 is deformed in the direction of the arrow A or the arrow B (rotation axis direction) on the tip end side, the lock strength is similarly reduced. The present invention has been made in view of the above problems, and a first object of the present invention is to provide a seat slide device in which lock strength does not decrease.

A second object of the present invention is to provide a seat track device capable of reducing costs.

[0012]

According to a first aspect of the present invention, there is provided a lower rail provided on a floor side and having a plurality of lock holes formed in a longitudinal direction, and movably engaged with the lower rail. An upper rail provided with a seat, and formed with a lock hole capable of facing the plurality of lock holes of the lower rail; a base end portion rotatably provided outside the upper rail; and a distal end portion provided with the upper rail. And a lock lever formed with teeth engageable with a lock hole provided in the lower rail, in the vicinity of the lock hole of the upper rail,
A seat slide device which is provided with a protrusion protruding in a direction parallel to a rotation plane of the lock lever and sandwiching a tip end side of the lock lever.

[0013] By providing a projection near the lock hole of the upper rail in a direction parallel to the rotation plane of the lock lever and sandwiching the tip end side of the lock lever, the play of the lock lever in the rotation axis direction is provided. Even if the lock lever is deformed in the direction of the rotation axis, the tip of the lock lever is held in the proper position by the protrusion, and the teeth of the lock lever completely engage with the lock holes of the upper rail and the lower rail, and the lock is locked. The strength does not decrease.

According to a second aspect of the present invention, there is provided the seat slide device according to the first aspect, wherein the protrusion is formed by bending and forming a bracket for reinforcing the lock hole of the upper rail.

Since the projection is formed by bending a bracket for reinforcing the lock hole of the upper rail, the number of assembly steps and the number of parts are reduced as compared with the case where the projection is formed as a separate part, and the cost is reduced. I can do it.

According to a third aspect of the present invention, there is provided a lower rail provided on a floor side and having a plurality of lock holes formed in a longitudinal direction, movably engaged with the lower rail, a seat provided, and a plurality of the lower rails. An upper rail having a lock hole opposed to the lock hole, a base end side provided rotatably on the outer side of the upper rail, and a distal end side engaged with a lock hole provided on the upper rail and the lower rail. In a seat slide device having a lock lever formed with possible teeth, a protrusion protruding in a direction parallel to a rotation plane of the lock lever and sandwiching an intermediate portion of the lock lever is provided on the upper rail. Is a seat slide device.

Since the upper rail is provided with a projection projecting in a direction parallel to the rotation plane of the lock lever and sandwiching an intermediate portion of the lock lever, the lock lever has a play in the rotation axis direction or the rotation of the lock lever. Even if the lock lever is deformed in the axial direction, the intermediate portion of the lock lever is held in a proper position by the projection, and the teeth of the lock lever are completely engaged with the lock holes of the upper rail and the lower rail, so that the lock strength does not decrease.

According to a fourth aspect of the present invention, in the seat according to the third aspect of the present invention, the protrusion is formed by bending a bracket for rotatably supporting a base end of the lock lever. It is a slide device.

Since the projection is formed by bending a bracket for rotatably supporting the base end of the lock lever, the number of assembly steps and the number of parts are reduced as compared with the case where the projection is formed as a separate part. Edge and cost reduction can be achieved.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a seat track device according to an embodiment of the present invention, FIG. 2 is a top view of FIG.
2 is a cross-sectional view taken along line AA in FIG. 2, FIG. 4 is a cross-sectional view taken along line BB in FIG. 2, FIG. 5 is a cross-sectional view taken along line CC in FIG. 2, and FIG. 2 is a sectional view taken along section line DD, FIG.
FIG. 8 is a view for explaining a mechanism for converting the rotational movement of the loop bracket lever of FIG. 1 into the rotational movement of the lock lever.

(Overall Configuration) A description will be given with reference to FIGS. In these figures, a lower rail 100 provided on the floor side has an upper rail 2 on which a seat is provided.
00 is movably engaged.

The upper rail 200 is provided with a lock mechanism 300 which is driven by the loop handle 330 and prohibits the upper rail 200 from moving with respect to the lower rail 100.

(Lower rail 100, upper rail 20
0) The cross-sectional shapes of the lower rail 100 and the upper rail 200 will be described with reference to FIGS.

The lower rail 100 has a base portion 103 provided substantially parallel to the floor, a first side wall portion having a lower end connected to one end of the base portion 103, and extending in a direction away from the floor. A lower end is connected to the other end of the base portion 103 and extends in a direction away from the floor, and has a second side wall 1 having substantially the same length as the first side wall 105.
07, one end is connected to the upper end of the first side wall 105, and the second side wall 10 is substantially parallel to the base 103.
A first top portion 109 extending in seven directions and a second side wall portion 1
One end is connected to the upper end of the
3, extending in the direction of the first side wall portion 105 substantially in parallel with the first ceiling portion 109, and extending from the other end of the first ceiling portion 109 to the base portion. The first hanging part 1 bent in the direction 103 and shorter in length than the first side wall 105
13 and the base 10 from the other end of the second top 111.
The first hanging part 113 is bent in three directions, is opposed to the first hanging part 113 via the space S, and has a second hanging part 115 having substantially the same length as the first hanging part 113.

The upper rail 200 has a base 203
And the upper end is connected to one end of the base 203,
A first side wall portion 205 extending from the space S of the lower rail 100 in the direction of the base portion 103 of the lower rail 100 and an upper end connected to the other end of the base portion 203 are provided. 100 bases 10
A second side wall portion 207 extending in three directions and a first side wall portion 105, a first top portion 109, and a first side portion of the lower rail 100 are bent from the lower end of the first side wall portion 205. The first extension portion 209 extending into the space S1 formed by the hanging portion 113 and the first sidewall portion 107 of the lower rail 100 are bent from the lower end portion of the second sidewall portion 207, And a second extending portion 211 extending into a space S2 formed by the second ceiling portion 111 and the first hanging portion 115.

Then, as shown in FIG.
00 and the first side wall 105 of the upper rail 200.
And the lower rail 10
In the space between the second side wall portion 107 of the upper rail 200 and the second extension portion 211 of the upper rail 200, two steel balls 1 are provided.
50, and the upper rail 200 is
In addition to being able to move smoothly with respect to 0, play in the vertical and horizontal directions between the lower rail 100 and the upper rail 200 is eliminated.

Reference numeral 151 denotes a holding member for holding the two steel balls 150. (Lock Mechanism 300) As shown in FIGS. 1 and 7, a plurality of lock holes 121 are formed in the first side wall portion 105 of the lower rail 100 at equal intervals along the longitudinal direction.

Also, three lock holes 221 are formed in the first extension 209 at the rear of the upper rail 200. Further, the base 203 of the upper rail 200 includes
The reinforcing bracket 233 having the lock hole 231 facing the lock hole 221 of the upper rail 200 is
5 is provided.

Next, as shown in FIGS. 1 and 2, the first bracket 3 is attached to the base 203 of the upper rail 200.
10. The second bracket 320 is fixed. First
The bracket 310 has a base 311 facing the base 203 of the upper rail 200, as shown in FIGS.
It comprises a bent portion 313 which is bent from the base 311 and faces the first side wall portion 105 of the lower rail 100.

A loop bracket lever 340 is rotatably attached to the bent portion 313 by using a pin 339. The loop bracket lever 340 is connected to the loop handle mounting portion 34 to which the loop handle 330 is mounted.
1 and a lever portion 351 that is connected to the loop handle mounting portion 341 and extends in the direction of the second bracket 320 in parallel with the first side wall portion 105 of the lower rail 100.

Also, as shown in FIG. 1, the bent portion 31 of the first bracket 310 of the loop bracket lever 340
A protrusion 340 a is formed on the surface facing the third member 3. On the other hand, the bent portion 313 of the first bracket 310 is formed with an elongated hole 313a into which the projection 340a is fitted, and the loop bracket lever 340 is formed such that the projection 340a is at both ends of the elongated hole 313a of the first bracket 310. Can be rotated only within the range of contact.

Also, one end of the loop bracket lever 3
The projection 340a of the loop bracket lever 340 is brought into contact with the lower end of the elongated hole 313a of the first bracket 310 by the torsion spring 347 whose other end is hooked to the first bracket 310. It is biased in the contact direction.

The second bracket 320 is also shown in FIGS.
As shown in FIGS. 4 to 6, the base 2 of the upper rail 200
03 and a base 411 opposed to the base 411, bent from the base 411,
It has a bent portion 413 facing the first side wall portion 105 of the lower rail 100.

On the first bracket 310 side of the bent portion 413, the lower rail 1 is bent from the lower end of the bent portion 413.
A lock lever support portion 415 is formed to extend in a direction orthogonal to the first side wall portion 105 of the first sheet.

A base end of the lock lever 501 is rotatably attached to the lock lever support portion 415 using a pin 503 (see FIGS. 1, 2, and 4). On the rotation end side of the lock lever 501, a lock hole 231 of the reinforcing bracket 233, a lock hole 121 of the lower rail 100,
Three teeth 505 that can be engaged with and disengaged from the lock hole 221 of the upper rail 200 are formed.

Further, the lock lever 501 has a slit 50 formed at one end thereof at the head of the pin 503.
3a, a spring 5 having an intermediate portion wound around a pin 503 and one end hooked to a lock lever 501.
11, the teeth 505 on the tip end side are
3 lock hole 231, lower rail 100 lock hole 12
1, it is urged in a direction (lock direction) in which it engages with the lock hole 221 of the upper rail 200.

On the reinforcing bracket 233 side of the bent portion 413 of the second bracket 320, as shown in FIGS. 1, 2 and 6, it is bent and formed in the direction of the rotation plane of the lock lever 501. Three protrusions 441, 443, 445
Are formed. These three protrusions 441, 443,
Of the 445, the protrusions 441 and 445 on both sides face the lower surface of the lock lever 501, and the middle protrusion 443 is provided at a position facing the upper surface of the lock lever 501.
Lock lever 501 with two protrusions 441, 443, 445
Is sandwiched by a small space.

Lock lever support portion 415 of bent portion 413
As shown in FIGS. 1, 2, and 5, a conversion lever bracket 451 orthogonal to the rotation plane of the lock lever 501 is formed between the lock lever 501 and the protrusion 441.

The conversion lever bracket 451 has a pin 46
1, the conversion lever 463 is rotatably provided. The conversion lever 463 is, as shown in FIG.
63a and the disk portion 463a.
And an arc-shaped portion 463b of approximately 90 ° centered on the center of the circle, and two bent portions 465 and 467 formed on both ends in the circumferential direction of the arc-shaped portion 463b and having an orthogonal planar relationship. .

On the other hand, a bent portion 353 which can be brought into contact with the bent portion 465 of the conversion lever 463 is formed at the tip of the lever portion 351 of the loop bracket lever 340. Further, a hole 507 is formed in the lock lever 501, and the bent portion 467 of the conversion lever 463 can contact the wall surface 507 a of the hole 507.

In the present embodiment, the lock lever 5
01, as shown in FIG.
Step 3 was formed in the lock lever 501 so as not to interfere with No. 3, and a hole 507 was formed in this step.

Accordingly, in FIG. 8, when the leading end side of the loop racket lever 340 moves downward, the bent portion 353 presses the bent portion 465 of the conversion lever 463,
The conversion lever 463 is rotated about the pin 461, and the bent portion 467 is formed on the wall surface 50 of the hole 507 of the lock lever 501.
7a is pressed, and the lock lever 501 is
, And rotates in the unlocking direction (the direction opposite to the locking direction).

In this embodiment, as shown in FIGS. 1, 2, and 7, the reinforcing bracket 233 protrudes in the direction in which the lock lever 501 rotates, and the distal end of the lock lever 501 is attached to the reinforcing bracket 233. Projection 24 sandwiched through some space
1 and 243 and the projections 245 and 247 are the reinforcing brackets 2
33 is formed by bending.

The operation of the above configuration will be described. The state shown in FIG. 1 and FIG.
1 and the teeth 505 on the tip end side are
33 lock holes 231, lower rail 100 lock holes 1
21, engages with the lock hole 221 of the upper rail 200,
It is in a locked state where the movement of the upper rail 200 with respect to the lower rail 100 is prohibited.

Here, when the loop handle 330 is lifted upward against the urging force of the torsion spring 347, the loop bracket lever 340 is rotated about the pin 339, and the bent portion 353 of the lever portion 351 is turned to the conversion lever. 463 is pressed, and the conversion lever 463 is pressed.
Rotates about the pin 461, the bent portion 467 presses the wall surface 507 a of the hole 507 of the lock lever 501, and the lock lever 501 rotates in the unlocking direction against the urging force of the spring 511. 2 is the position indicated by the two-dot chain line.

In this state, the teeth 505 on the tip end side of the lock lever 501 are fixed to the lock holes 23 of the reinforcing bracket 233.
The lock rail 121 is unlocked from the lock hole 121 of the lower rail 100 and the lock hole 221 of the upper rail 200, and the upper rail 200 is movable with respect to the lower rail 100.

When the predetermined seat position is determined, the operation force on the loop handle 330 is released. Then, the biasing force of the torsion spring 347 causes the loop bracket lever 340 to return to the original position, whereby the pressing of the bent portion 353 of the lever portion 351 against the bent portion 465 of the conversion lever 463 is released.

Accordingly, the lock lever 501 also returns to the original position (the position indicated by the solid line in FIG. 2) by the urging force of the spring 511, and the teeth 505 on the tip end side of the lock lever 501 are formed.
Engages again with the lock hole 231 of the reinforcing bracket 233, the lock hole 121 of the lower rail 100, and the lock hole 221 of the upper rail 200, and returns to the locked state in which the movement of the upper rail 200 with respect to the lower rail 100 is prohibited.

According to the above configuration, the following effects can be obtained. (1) In the vicinity of the lock hole 221 of the upper rail 200,
Projecting in a direction parallel to the rotation plane of the lock lever 501,
Protrusions 241 and 24 sandwiching the distal end of lock lever 501
3 and the projections 245 and 247, even if the lock lever 501 has a play in the direction of the rotation axis or is deformed in the direction of the rotation axis, the distal end side of the lock lever 501 has the protrusions 241 and 243. , 245, 247, the teeth 505 of the lock lever 501 are completely engaged with the reinforcing bracket 233, the lock holes 231, 221 and 121 of the upper rail 200 and the lower rail 100, and the lock strength does not decrease.

Further, the projections 241, 243, 245, 2
47 is formed by bending and forming a reinforcing bracket 233 for reinforcing the lock hole 221 of the upper rail 200, so that the number of assembling steps and the number of parts are reduced as compared with the case where the protrusions 241, 243, 245 and 247 are formed as separate parts. Edge and cost reduction can be achieved.

(2) Since the upper rail 200 is provided with projections 441, 443, 445 that project in a direction parallel to the rotation plane of the lock lever 501 and sandwich the intermediate portion of the lock lever 501, the rotation of the lock lever 501 is prevented. Even if there is backlash in the axial direction or deformation in the direction of the rotation axis,
The intermediate part of the lock lever 501 is the protrusions 441, 443, 4
45, the lock lever 501
Teeth 505 are reinforcing bracket 233, upper rail 20
0, lock holes 231, 221, 12 of the lower rail 100
1 is completely engaged, and the lock strength does not decrease.

Further, the protrusions 441, 443, 445
A second rotatably supporting the base end of the lock lever 501;
By bending and forming the bracket 320, the number of assembly steps and the number of parts are reduced as compared with the case where the protrusions 441, 443, and 445 are formed as separate parts, and cost reduction can be achieved.

[0053]

As described above, according to the first aspect of the present invention, the lock lever protrudes in the direction parallel to the rotation plane of the lock lever near the lock hole of the upper rail, and the tip end side of the lock lever is closed. Even if the lock lever has play in the direction of the rotation axis or is deformed in the direction of the rotation axis by providing the sandwiching projection, the tip of the lock lever is held in the proper position by the projection and locked. The teeth of the lever are completely engaged with the lock holes of the upper rail and the lower rail, and the lock strength is not reduced.

According to the second aspect of the present invention, the protrusion is formed by bending and forming a bracket for reinforcing the lock hole of the upper rail. The number of man-hours and the number of parts are reduced, and costs can be reduced.

According to the third aspect of the present invention, the upper rail is provided with a projection projecting in a direction parallel to the rotation plane of the lock lever and sandwiching an intermediate portion of the lock lever. Even if there is backlash in the rotation axis direction or deformation in the rotation axis direction, the middle part of the lock lever is held in the proper position by the protrusion, and the teeth of the lock lever are completely inserted into the lock holes of the upper rail and the lower rail. Engage and lock strength does not decrease.

According to the fourth aspect of the present invention, the protrusion is formed by bending and forming a bracket for rotatably supporting the base end of the lock lever, so that the protrusion is a separate part. As compared with, the number of assembly steps and the number of parts are reduced, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a seat track device according to an embodiment of the present invention.

FIG. 2 is a top view of FIG.

FIG. 3 is a sectional view taken along section line AA in FIG. 2;

FIG. 4 is a sectional view taken along section line BB in FIG. 2;

FIG. 5 is a sectional view taken along section line CC of FIG. 2;

FIG. 6 is a sectional view taken along section line DD in FIG. 2;

FIG. 7 is a sectional view taken along section line EE in FIG. 2;

FIG. 8 is a view for explaining a mechanism for converting the rotation of the loop bracket lever of FIG. 1 into the rotation of a lock lever.

FIG. 9 is a perspective view illustrating a conventional seat track device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 100 Lower rail 121 Lock hole 200 Upper rail 221 Lock hole 233 Reinforcement bracket 241, 243, 245, 247 Projection 320 Second bracket 441, 443, 445 Projection

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Osamu Nagano 2 Kirihara-cho, Fujisawa-shi, Kanagawa Prefecture Shiroki Industry Co., Ltd. F-term (reference) 3B087 BA02 BB02 BC05 BC07

Claims (4)

[Claims] 1. A lower rail provided on a floor side and having a plurality of lock holes formed in a longitudinal direction, a seat movably engaged with the lower rail, and a seat provided.
An upper rail having a plurality of lock holes that can be opposed to the plurality of lock holes of the lower rail; a base end side rotatably provided outside the upper rail; and a distal end side provided with the upper rail and the lower rail. A lock lever formed with teeth engageable with a lock hole, wherein the seat slide device protrudes in a direction parallel to a rotation plane of the lock lever near a lock hole of the upper rail, and a tip of the lock lever. A seat slide device provided with a protruding portion sandwiching the side of the seat. 2. The seat slide device according to claim 1, wherein the protrusion is formed by bending a bracket for reinforcing a lock hole of the upper rail. 3. A lower rail provided on the floor side and having a plurality of lock holes formed in a longitudinal direction, movably engaged with the lower rail, and a seat provided.
An upper rail in which a lock hole facing the plurality of lock holes of the lower rail is formed, a base end side is rotatably provided outside the upper rail, and a lock provided on the upper rail and the lower rail is provided on a distal end side. A lock lever formed with teeth engageable with a hole; and a seat slide device having: a protrusion protruding in a direction parallel to a rotation plane of the lock lever and sandwiching an intermediate portion of the lock lever on the upper rail. A seat slide device characterized by being provided. 4. The seat slide device according to claim 3, wherein the projection is formed by bending a bracket that rotatably supports a base end of the lock lever.