JP2010221936A - Vehicle seat slide device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle seat slide device which simplifies a slide operation when greatly sliding the seat, and, even when rapid acceleration is applied to the seat, prevents the seat slide due to the acceleration. <P>SOLUTION: A lower rail 10 includes: a brake pad 42 energized to advance toward an upper rail 20; and a plate 48 for blocking the advance of the brake pad 42. The advance of the brake pad 42 is blocked by the plate 48 during a normal period that a predetermined acceleration force is not applied to the vehicle seat 1 in the slide direction thereof. When the predetermined acceleration force is applied to the vehicle seat 1 in the slide direction thereof, the blocking of the advance of the brake pad 42 is released as the plate 48 is moved by the applied acceleration. Upon the release thereof, the brake pad 42 advances toward the upper rail 20. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle seat slide device, and more particularly to a vehicle seat slide device provided with a safety lock.

  Conventionally, when the occupant releases the seat slide lock to adjust the seat slide position (position in the front-rear direction of the seat), for example, sudden acceleration or sudden stop of the vehicle causes rapid acceleration of the seat. Even in the case of the action of the vehicle, a vehicle seat slide device having a safety lock that prevents the passenger from sliding unintentionally due to the acceleration is already known. Patent Document 1 below discloses a vehicle seat slide device in which the slidable amount of a seat is regulated by an auxiliary lock even when the seat slide lock is released. As a result, even when the seat is unlocked and the seat is unintentionally slid, the amount of sliding can be suppressed (the seat can be prevented from sliding greatly). Therefore, the safety of the passenger can be ensured.

JP-A-8-164780

  However, the above-described conventional technology has a structure in which the slidable amount of the seat is regulated by the auxiliary lock even when a rapid acceleration is not applied to the seat. Therefore, when it is desired to slide the seat greatly, it is necessary not only to release the slide lock but also to release the auxiliary lock. As described above, since it is necessary to release the lock twice (release the slide lock and release the auxiliary lock), the slide operation when the seat is largely slid is complicated.

  The present invention is intended to solve such a problem, and its purpose is to simplify the sliding operation when the sheet is greatly slid, and even when a sudden acceleration is applied to the sheet, the sheet is caused by the acceleration. It is an object of the present invention to provide a vehicle seat sliding device that can prevent sliding.

The present invention is for achieving the above object, and is configured as follows.
The invention according to claim 1 includes a lower rail assembled on the vehicle floor side, an upper rail assembled on the vehicle seat side so as to be slidable with respect to the lower rail, and a slide lock that regulates sliding of the upper rail with respect to the lower rail, This is a vehicle seat slide device in which the slide lock is unlocked and the upper rail is slid relative to the lower rail to adjust the seat slide position, and the lower rail side is urged to advance toward the upper rail side. The brake unit having a brake pad and a plate capable of shielding the advancement of the brake pad is provided, and in a normal time when a predetermined amount of acceleration does not act on the vehicle seat in the sliding direction, Brake pad advancement is shielded by plates When the acceleration of a predetermined magnitude acts on the vehicle seat in the sliding direction, the advancement of the brake pad is canceled along with the movement of the plate due to the applied acceleration, and the brake pad is released along with the cancellation. Is configured to generate frictional resistance between the lower rail side and the upper rail side by advancing toward the upper rail side.
According to this configuration, the occupant can slide the vehicle seat greatly only by releasing the slide lock. Therefore, when the vehicle seat is slid largely, as described in the prior art, it is not necessary to release the lock twice, so that the sliding operation can be easily performed. Further, according to this configuration, even when a rapid acceleration is applied to the vehicle seat when the occupant is unlocking the slide lock, the unintended slide of the occupant can be prevented by the acceleration. That is, the safety lock can be activated. Moreover, according to this structure, the malfunction of a safety lock can be prevented at the normal time when the rapid acceleration is not acting on the vehicle seat.

The invention according to claim 2 is the sliding device for the vehicle seat according to claim 1, wherein the brake unit is provided so that acceleration acting on the vehicle seat can cope with any of the sliding directions. It is the structure characterized by having.
According to this configuration, the brake units are respectively configured to form front and rear objects on the outer wall surface of the lower rail. Therefore, for example, the safety lock can be actuated when the vehicle stops suddenly or when the vehicle suddenly starts.

FIG. 1 is an exploded perspective view of a sliding device for a vehicle seat according to an embodiment of the present invention. FIG. 2 is a perspective view showing the assembled state of FIG. FIG. 3 is a partially enlarged view of the left lower rail in FIG. 1. 4 is an exploded perspective view of the brake unit in FIG. FIG. 5 is a cross-sectional view of the lower rail of FIG. FIG. 6 is a cross-sectional view of the lower rail showing a state in FIG. 5 when a sudden acceleration is applied to the vehicle seat due to, for example, a sudden stop of the vehicle.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. In the following description, “up”, “down”, “front”, “back”, “left”, and “right” refer to the directions of “up”, “down”, “front”, “back”, “left”, and “right” described in the above-described drawings. It shows the direction of up, down, front, back, left, right when used as a reference.

  First, a schematic configuration of a sliding device 4 for a vehicle seat 1 according to an embodiment of the present invention will be described with reference to FIGS. As an example of the sliding device 4 for the vehicle seat 1, the sliding device 4 for the passenger seat will be described as an example.

  The sliding device 4 includes a pair of left and right lower rails 10 and 10 assembled along the front-rear direction of the vehicle floor F, and left and right assembled to the seat cushion 2 of the vehicle seat 1 so as to be slidable with respect to both the lower rails 10. A pair of upper rails 20, 20, and left and right slide locks 30, 30 that are assembled to the upper rails 20 and restrict the sliding of the upper rails 20 with respect to the lower rails 10, respectively.

  A plurality of locking holes 12a into which locking claws 32a of both arms 32 described later can be inserted are formed in the inner wall surface 12 on the inner side of the lower rails 10 along the longitudinal direction thereof. In addition, a long hole 14b into which a third pin 52 of a plate 48 to be described later can be inserted is formed along the longitudinal direction on the front end side of the left outer wall surface 14 of the left lower rail 10. Further, in the outer wall surface 14, a first pin 16 whose height direction coincides with the axial center of the long hole 14 b is formed in the vicinity of the front end of the long hole 14 b. The long hole 14b and the first pin 16 are respectively formed on the left outer wall surface 14 of the left lower rail 10 so as to be front and rear objects.

  Here, the left and right slide locks 30 and 30 will be described in detail. The left and right slide locks 30 and 30 are known lock mechanisms and are configured to be symmetrical with respect to the wall surfaces 22 of the upper rails 20. Yes. Therefore, in the following description, only the left slide lock 30 among the left and right slide locks 30 and 30 will be described, and the description of the right slide lock 30 will be omitted.

  The left slide lock 30 is mainly composed of a left arm 32 that is mounted on the wall surface 22 of the left upper rail 20 so as to be rotatable about an axis whose longitudinal direction is the axial direction. ing. At the tip of the left arm 32, for example, three locking claws 32 a that can be simultaneously inserted into three consecutive locking holes 12 a among the plurality of locking holes 12 a of the left lower rail 10 are formed. ing.

  The left arm 32 is connected via a knob (not shown) that can be operated by the occupant and an operation cable (not shown), and when the occupant is not operating the knob, the three arms are normally operated. The locking claw 32a is assembled to the wall surface 22 of the left upper rail 20 in a state where the locking claw 32a is biased in a direction to be inserted into the locking hole 12a of the left lower rail 10. When the three locking claws 32a are inserted into the three consecutive locking holes 12a, the left slide lock 30 is locked, that is, the left upper rail 20 slides relative to the left lower rail 10. It will be locked. In this state, the occupant cannot slide the vehicle seat 1.

  In order to adjust the slide position of the vehicle seat 1 from this state, the occupant first operates the knob to rotate the left arm 32 in the direction opposite to the urging direction thereof. Then, the insertion of the locking claw 32a of the left arm 32 and the locking hole 12a of the left lower rail 10 is eliminated, so that the left slide lock 30 is unlocked, that is, left with respect to the left lower rail 10. The slide of the upper rail 20 is unlocked. In this state, the occupant can freely slide the vehicle seat 1.

  When the vehicle seat 1 is slid to a desired position, the occupant releases the operation of the knob, and the urging force acting on the left arm 32 causes the locking claw 32a of the left arm 32 to move to the left lower rail 10. Are inserted into the locking holes 12a. Thereby, the left slide lock 30 can be returned to the locked state. As described above, when the occupant operates the knob, not only the left arm 32 but also the right arm 32 is simultaneously rotated.

  Therefore, the left and right slide locks 30 and 30 are simultaneously in a locked state (hereinafter simply referred to as “slid lock 30 locked state”), and at the same time in an unlocked state (hereinafter simply referred to as “slid lock 30 unlocked state”). Is written). Accordingly, the occupant can freely adjust the slide position of the vehicle seat 1 by operating the knob. The left and right slide locks 30 and 30 are configured in this way.

  Further, the slide device 4 includes brake units 40 and 40 in front of and behind the outer wall surface 14 of the left lower rail 10, respectively. The front and rear brake units 40, 40 are respectively configured to form a front / rear object on the left outer wall surface 14 of the left lower rail 10. Therefore, in the following description, only the front brake unit 40 among the front and rear brake units 40, 40 will be described, and the description of the rear brake unit 40 will be omitted.

  As shown in FIGS. 3 to 5, the front brake unit 40 mainly includes a brake pad 42 urged to advance toward the left outer wall surface 24 of the left upper rail 20, and the advancement of the brake pad 42. It is comprised from the plate 48 which can shield. Below, each of these members 42 and 48 is demonstrated separately.

  First, the brake pad 42 will be described. The brake pad 42 is a member formed in a substantially pin shape having a brake surface at the tip 42a. The brake pad 42 is attached by a compression spring 44 so that the tip 42 a side thereof advances from the through hole 14 a formed in the left outer wall surface 14 of the left lower rail 10 toward the left outer wall surface 24 of the left upper rail 20. The bracket 46 is assembled in a substantially U-shaped bracket 46 in a biased state.

  At this time, the brake pad 42 is assembled inside the bracket 46 so that a step 42 c formed on the peripheral surface on the base end 42 b side can be engaged with an edge of a locking hole 46 a formed in the bracket 46. Thereby, the brake pad 42 can prevent the base end 42 b side from falling off the bracket 46. Further, the tip 42a of the brake pad 42 is formed in a taper shape with a tapered periphery (hereinafter referred to as “taper surface 42a1”). The brake pad 42 is configured in this way.

  Next, the plate 48 will be described. The plate 48 is a member formed in a thin plate shape whose base end (right end in FIG. 5) 48b side shields the advancement of the brake pad 42 described above. A second pin 50 that protrudes toward the left side is integrally formed at the front end (left end in FIG. 5) 48a of the plate 48. In addition, a third pin 52 that protrudes toward the left side is integrally formed in the middle portion of the plate 48 in the longitudinal direction, similarly to the second pin 50.

  In addition, the plate 48 is in a state where the tension spring 54 is hooked between the second pin 50 and the first pin 16 of the left lower rail 10, and the third pin 52 is left-handed. In the state inserted in the long hole 14b of the lower rail 10, it is assembled | attached inside the left outer wall surface 14 of the left lower rail 10 (refer FIG. 3, 4). Further, the end surface on the base end 48b side of the plate 48 is formed in a tapered shape so as to be slidable with respect to the tapered surface of the distal end 42a of the brake pad 42 (hereinafter referred to as “taper surface 48b1”).

  When the acceleration of a predetermined magnitude does not act on the vehicle seat 1 in the sliding direction (in this case, the front-rear direction in this case), the base end 48b side of the plate 48 is the through hole of the left lower rail 10. The front end 42a of the brake pad 42 is blocked from advancing from 14a (see FIG. 5). The plate 48 is configured in this way. The brake unit 40 is constituted by the brake pad 42 and the plate 48.

  Next, with reference to FIGS. 5-6, the effect | action of the sliding apparatus 4 of the vehicle seat 1 which consists of the structure mentioned above is demonstrated. In describing this operation, the description will be made from the time when the slide lock 30 is in the locked state.

  The occupant can unlock the slide lock 30 by operating the knob and slide the vehicle seat 1 freely. The passenger can adjust the slide position of the vehicle seat 1 by sliding the vehicle seat 1 to a desired position and returning the slide lock 30 to the locked state by releasing the knob operation.

  Here, when an occupant is operating the knob (when the slide lock 30 is unlocked), for example, if a sudden acceleration is applied to the vehicle seat 1 due to a sudden stop of the vehicle, the vehicle is driven by the applied acceleration. The seat 1 slides forward. That is, the vehicle seat 1 slides forward in a state unintended by the occupant. At this time, sudden acceleration also acts on the third pin 52 formed integrally with the plate 48 of the previous brake unit 40, so that the plate 48 also resists the urging force of the tension spring 54 due to this acting acceleration. And move forward.

  Then, since the shielding of the advancement of the tip 42a of the brake pad 42 is canceled, the brake pad 42 is moved from the through hole 14a of the left lower rail 10 to the left of the left upper rail 20 by the biasing force of the compression spring 44 biasing itself. Start to advance toward the outer wall 24. As a result, a frictional resistance is generated between the brake surface of the tip 42a of the brake pad 42 and the left outer wall surface 24 of the left upper rail 20, and the sliding of the vehicle seat 1 stops due to the generated frictional resistance (FIG. 6). reference). Therefore, the safety lock is activated, and the vehicle seat 1 can be prevented from sliding forward.

  When the rapid acceleration acting on the vehicle seat 1 is eliminated, the plate 48 moved forward is also returned to the state before being moved by the urging force of the tension spring 54. At this time, the plate 48 is returned in such a manner that the tapered surface 48b1 of the base end 48b and the tapered surface 42a1 of the tip 42a of the brake pad 42 slide. As a result, the brake pad 42 also retreats to the through hole 14a of the left lower rail 10 against the urging force of the compression spring 44 acting on itself. Eventually, when the plate 48 is completely returned, the brake pad 42 is also completely retracted, so that the advancement of the front end 42a of the brake pad 42 is also returned to the state shielded by the base end 48b side of the plate 48 (see FIG. 5). .

  In the description of this action, the description “when the occupant is operating the knob, for example, when a sudden acceleration acts on the vehicle seat 1 due to the sudden stop of the vehicle” is described in the claims. This corresponds to a case where an acceleration of a predetermined magnitude acts on the vehicle seat in the sliding direction. Here, “acceleration of a predetermined magnitude” described in the claims is an acceleration when the safety lock is to be operated, and is determined by, for example, a spring constant of the tension spring 54 in this embodiment. It is a design matter.

  On the other hand, when the occupant is operating the knob, on the other hand, for example, even when a sudden acceleration is applied to the vehicle seat 1 due to the sudden start of the vehicle, the above explanation (the occupant operates the knob). When, for example, a sudden acceleration of the vehicle seat 1 is caused by a sudden stop of the vehicle, the rear brake unit 40 operates the safety lock to slide the vehicle seat 1 backward. Can be prevented.

  The sliding device 4 for the vehicle seat 1 according to the embodiment of the present invention is configured as described above. According to this configuration, the slide device 4 has the left and right slide locks 30 and 30 that can adjust the slide position of the vehicle seat 1 by sliding the pair of left and right upper rails 20 and 20 with respect to the pair of left and right lower rails 10 and 10. It has. Therefore, the passenger | crew can slide the vehicle seat 1 largely only by operating the knob which cancels | releases the slide locks 30 and 30 on either side. Therefore, when the vehicle seat 1 is slid largely, as described in the prior art, it is not necessary to unlock twice, so that the sliding operation can be easily performed.

  Further, according to this configuration, when the occupant operates the knob, for example, when a sudden acceleration acts on the vehicle seat 1 due to a sudden stop or sudden start of the vehicle, the brake pad 42 compresses itself. The spring 44 starts to advance from the through hole 14a of the left lower rail 10 toward the left outer wall surface 24 of the left upper rail 20 by the urging force of the spring 44. Thus, a frictional resistance is generated between the brake surface of the tip 42a of the brake pad 42 and the left outer wall surface 24 of the left upper rail 20, and the sliding of the vehicle seat 1 is stopped by the generated frictional resistance. As a result, the safety lock is activated, and sliding that is not intended by the occupant can be prevented. It should be noted that the advancement of the brake pad 42 on the front end 42 a side is shielded by the base end 48 b side of the plate 48 at normal times when no rapid acceleration is applied to the vehicle seat 1. Therefore, at this normal time, no frictional resistance is generated between the brake surface of the tip 42 a of the brake pad 42 and the left outer wall surface 24 of the left upper rail 20. Therefore, the malfunction of the safety lock can be prevented at this normal time.

  Moreover, according to this structure, the brake unit 40 is each comprised so that the front-back object may be comprised in the left outer wall surface 14 of the left lower rail 10. FIG. Therefore, for example, the safety lock can be actuated when the vehicle stops suddenly or when the vehicle suddenly starts.

The contents described above are only related to one embodiment of the present invention, and do not mean that the present invention is limited to the above contents.
In the embodiment, as an example of the sliding device 4 for the vehicle seat 1, the sliding device 4 for the passenger seat has been described as an example. However, the present invention is not limited to this. For example, a rear seat slide device may be used.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 4 Slide apparatus 10 Lower rail 20 Upper rail 30 Slide lock 40 Brake unit 42 Brake pad 48 Plate

Claims (2)

A lower rail assembled on the vehicle floor side, an upper rail assembled on the vehicle seat side so as to be slidable with respect to the lower rail, and a slide lock for restricting the sliding of the upper rail with respect to the lower rail, the slide lock is unlocked to the lower rail. A vehicle seat slide device capable of adjusting the seat slide position by sliding the upper rail against the vehicle,
On the lower rail side, a brake unit having a brake pad biased to advance toward the upper rail side and a plate capable of shielding the advancement of the brake pad is provided.
In normal times when a predetermined amount of acceleration is not acting in the sliding direction on the vehicle seat, the advancement of the brake pad is shielded by the plate,
When an acceleration of a predetermined magnitude acts on the vehicle seat in the sliding direction, the shielding of the brake pad advancement is canceled along with the movement of the plate due to the applied acceleration, and the brake pad is moved to the upper rail with the cancellation. A sliding device for a vehicle seat, wherein a frictional resistance is generated between the lower rail side and the upper rail side by advancing toward the side. The vehicle seat slide device according to claim 1,
The brake unit is provided with a sliding device for a vehicle seat, in which an acceleration acting on the vehicle seat can be adapted to any of the sliding directions.

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