JP6594179B2 - Seat slide device and vehicle seat - Google Patents

Description

  The present invention relates to a seat slide device and a vehicle seat.

  A seat slide device for a vehicle seat described in Patent Literature 1 includes two sets of rails each including a lower rail installed on a floor and an upper rail supported by the lower rail so as to be movable in the longitudinal direction of the rail. A sheet is placed across the.

  A rod-shaped arm is inserted between the lower rail and the upper rail in the rail longitudinal direction, and the upper rail is supported by a support portion that supports the inserted arm so as to be swingable in the rail height direction, and a tip portion of the arm. A lock plate having a pressed portion to be pressed is attached.

  The lock plate is made of an elastically flexible plate material, and the pressed portion is connected to the support portion so as to be displaceable in the rail height direction, and the lower rail of the lower rail that sandwiches the pressed portion and the pressed portion in the rail width direction. Lock portions for fixing the upper rail to the lower rail are provided on the pair of side walls, respectively.

  When the pressed portion of the lock plate is bent along with the swinging operation of the arm, the engagement between the lock portion of the lock plate and the lock portion of the lower rail is released, and the fixation of the upper rail to the lower rail is also released. On the other hand, when the arm is released and the pressed portion of the lock plate is restored, the lock portion of the lock plate and the lock portion of the lower rail are engaged again, and the upper rail is fixed to the lower rail.

Japanese Patent No. 4038281

  In the seat slide device described in Patent Document 1, the two arms inserted between the lower arm and the upper arm of each of the two rail sets are usually connected to each other so as to be integrally swingable. It is composed of both ends of a control bar formed by bending a single bar into a substantially U shape.

  However, the control bar formed by bending the bar material includes a molding error, and there is a risk that the control bar swings or moves with the upper rail, and may hit or slide with the upper rail or the lower rail. In addition, the operation of the seat slide device may be hindered.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a seat slide device and a vehicle seat that can suppress abnormal noise and increase the reliability of operation.

A seat slide device according to an aspect of the present invention includes a pair of lower rails installed on a floor, a pair of upper rails supported by the lower rail so as to be movable in a rail longitudinal direction, and a seat placed thereon, and the rail sliding device in the rail longitudinal direction. A control bar having a pair of arms inserted between the lower rail and the upper rail, and a pair of lock plates attached to each of the upper rails, wherein the lock plate is made of an elastically flexible plate material. A support portion through which the arm is inserted, the support portion supporting the arm so as to be swingable in the rail height direction around the support hole, and the support portion being displaceable in the rail height direction. It is continuously provided to have a, a pressed portion which elastically deflects the rail height direction by being pressed by the tip portion of the arm, the object A pair of side walls of the lower rail sandwiching the pressure part and the pressed part in the rail width direction is provided with a lock part that is releasably engaged by a relative movement in the rail height direction. A pair of ribs are erected along the edges on both sides extending in the rail longitudinal direction at the connection portion between the lock portion and the support portion.

  Moreover, the vehicle seat of 1 aspect of this invention is provided with the said seat slide apparatus.

  According to the present invention, it is possible to provide a seat slide device and a vehicle seat that can suppress abnormal noise and increase the reliability of operation.

It is a perspective view of an example of a vehicular seat provided with a seat slide device for explaining an embodiment of the present invention. It is sectional drawing of a set of lower rail and upper rail of the seat slide apparatus of FIG. FIG. 2 is a perspective view of a lock plate included in a lock mechanism of the seat slide device of FIG. 1 and an arm that engages with the lock plate. It is a top view of the lock plate and arm of FIG. It is sectional drawing of the locking mechanism of the seat slide apparatus of FIG. It is a side view of the modification of the arm engaged with the lock plate and lock plate of FIG.

  FIG. 1 shows an example of a vehicle seat provided with a seat slide device for explaining an embodiment of the present invention.

  The vehicle seat 1 is a seat mounted on a vehicle such as an automobile, and includes a seat cushion 2 that constitutes a seat surface portion, a seat back 3 that constitutes a backrest portion, and a seat slide device 5.

  The seat slide device 5 includes two sets of rails including a lower rail 10 installed on the floor and an upper rail 11 supported by the lower rail 10 so as to be movable in the longitudinal direction. The two sets of rails are arranged extending in the seat front-rear direction in parallel with each other, and the seat cushion 2 is placed across the two upper rails 11.

  An arm 13 is inserted in the rail longitudinal direction from the rail front end side between the lower rail 10 and the upper rail 11 of each of the two rail sets. It is comprised by the both ends of the control bar 12 bent in the shape.

  FIG. 2 shows a cross section of a set of lower rail 10 and upper rail 11 of the seat slide device 5.

  The upper rail 11 has a pair of guided portions 21 provided with a placement portion 20 on which the seat cushion 2 is placed sandwiched in the width direction. The lower rail 10 has a pair of guide portions 22 that guide the pair of guided portions 21 of the upper rail 11 in the rail longitudinal direction.

  The guide portion 22 includes an upper wall 23 and a lower wall 24 that face the guided portion 21 in the rail height direction, and an outer wall 25 and an inner wall 26 that face the guided portion 21 in the rail width direction. It is formed so as to surround the portion 21.

  The guided rail 21 is inserted into the guide portion 22 from the end opening on one side in the rail longitudinal direction of the lower rail 10, and the mounting portion 20 is inserted between the pair of guide portions 22, so that the upper rail 11 is connected to the lower rail 10. Assembled into.

  A plurality of balls 27 are interposed between the guided portion 21 and the guide portion 22, and the upper rail 11 is moved along the lower rail 10 by the rolling of the balls 27. Note that a sliding member made of a resin material having excellent slidability is provided on at least one of the outer surface of the guided portion 21 and the inner surface of the guide portion 22, and the upper rail 11 is moved by sliding of the sliding member. Good.

  A lock plate 14 is attached to the upper rail 11, and the arm 13 of the control bar 12 inserted between the lower rail 10 and the upper rail 11 is engaged with the lock plate 14. The upper rail 11 is fixed to the lower rail 10 by a lock mechanism including the arm 13 and the lock plate 14.

  3 to 5 show the configuration of the lock mechanism including the arm 13 and the lock plate 14.

  The lock plate 14 is made of an elastically flexible plate material, and includes an attachment portion 30 attached to the placement portion 20 of the upper rail 11, and a support portion 31 extending in the rail height direction from the attachment portion 30 toward the lower rail 10 side. And a pressed part 32 extending in the rail longitudinal direction from the support part 31.

  The support portion 31 is provided with a support hole 33 through which the arm 13 is inserted. The arm 13 inserted through the support hole 33 can swing in the rail height direction around the support hole 33, and the tip of the arm 13 that is displaced in the rail height direction along with the swing is the pressed portion. 32 is engaged.

  The pressed part 32 can be displaced in the rail height direction by bending itself. And the lock | rock part 34 in which several unevenness | corrugations are arranged in the comb-tooth shape along the edge of the both sides of the to-be-pressed part 32 extended in a rail longitudinal direction is provided in the front end side of the to-be-pressed part 32.

  The pressed portion 32 is sandwiched between inner walls 26 of each of the pair of guide portions 22 of the lower rail 10, and the inner wall 26 of each of the pair of guide portions 22 has a plurality of irregularities along the edges. A lock portion 29 arranged in a line is provided.

  The lock part 34 of the pressed part 32 and the lock part 29 of each of the pair of guide parts 22 are engaged with each other so as to be releasable by a relative movement in the rail height direction through a notch provided in the upper rail 11. .

  When the control bar 12 is pulled up, the arm 13 is swung, and the tip of the arm 13 is displaced downward toward the lower rail 10 side. The pressed portion 32 of the lock plate 14 is pushed down by the distal end portion of the arm 13 with its own bending. As a result, the engagement between the lock portion 34 of the pressed portion 32 and the lock portions 29 of the pair of guide portions 22 of the lower rail 10 is released, and the upper rail 11 is released from being fixed to the lower rail 10.

  When the control bar 12 is released, the pressed portion 32 of the lock plate 14 is restored by its own elasticity while swinging the arm 13 so as to push up the tip of the arm 13. Accordingly, the lock portion 34 of the pressed portion 32 and the lock portions 29 of the pair of guide portions 22 of the lower rail 10 are engaged again, and the upper rail 11 is fixed to the lower rail 10.

  The connecting portion 35 between the lock portion 34 and the support portion 31 of the pressed portion 32 is provided with a pair of ribs 36 extending along the edges on both sides extending in the rail longitudinal direction, and presses the pressed portion 32. The distal end portion of the arm 13 is disposed between the pair of ribs 36.

  For example, the control bar 12 includes a molding error such that the interval between the arms 13 gradually increases or decreases toward the tip, and the tip of the arm 13 extends from the pressed portion 32 of the lock plate 14 in the rail width direction in relation to the rail interval. Even in the case where the arm 13 protrudes, the distal end portion of the arm 13 is held between the pair of ribs 36 and is held on the pressed portion 32 without protruding from the pressed portion 32.

  As a result, the contact between the arm 13 and the lower rail 10 or the upper rail 11 caused by the swinging of the arm 13 is suppressed, and the arm 13 and the lower rail 10 are moved together with the movement of the upper rail 11 in a state where the fixing to the lower rail 10 is released. Contact is suppressed. Therefore, abnormal noise of the seat slide device 5 can be suppressed, and the reliability of the operation of the seat slide device 5 can be improved.

  Further, the distal end portion of the arm 13 may be extended to the locking portion 34 on the distal end side of the pressed portion 32 to press the locking portion 34. In this example, the connecting portion 35 is configured to be pressed. . Since the rigidity of the connection portion 35 is enhanced by the pair of ribs 36, the bending portion 37 that is a connection portion with the support portion 31 of the pressed portion 32 is bent in the same manner as when the lock portion 34 is pressed, The movement of the lock part 34 is also equivalent.

  And according to the structure by which the connection part 35 is pressed by the front-end | tip part of the arm 13, the arm 13 can be shortened and the cost reduction and weight reduction of the seat slide apparatus 5 can be achieved.

  FIG. 6 shows a configuration of a modified example of the lock plate 14 and the arm 13.

  In the example shown in FIG. 6, a buffer member 38 that comes into contact with the distal end portion of the arm 13 is provided on the pressed portion 32 of the lock plate 14 that is pressed by the distal end portion of the arm 13. In the illustrated example in which the connecting portion 35 of the pressed portion 32 is pressed by the distal end portion of the arm 13, the buffer material 38 is provided on the connecting portion 35. In the operation of the locking mechanism described above, the tip end portion of the arm 13 that pushes down the pressed portion 32 comes into contact with the cushioning material 38, and the noise of the seat slide device 5 is further suppressed. Examples of the buffer material 38 include rubber and elastomer.

  Further, in the illustrated example, the cushioning material 38 is disposed so as to protrude from the surface of the connecting portion 35, and a concave portion 39 into which the cushioning material 38 is fitted is provided at the distal end portion of the arm 13. When the cushioning material 38 is fitted into the recess 39 at the tip of the arm 13, the tip of the arm 13 is placed on the pressed portion 32 by the cushioning materials 38 and 39 in addition to the pair of ribs 36 (see FIG. 3). Can hold. Thereby, the abnormal noise of the seat slide device 5 can be further suppressed, and the reliability of the operation of the seat slide device 5 can be further improved.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat cushion 3 Seat back 5 Seat slide apparatus 10 Lower rail 11 Upper rail 12 Control bar 13 Arm 14 Lock plate 20 Mounting part 21 Guided part 22 Guide part 23 Upper wall 24 Lower wall 25 Outer side wall 26 Inner side wall 27 Ball 29 Locking portion 30 Mounting portion 31 Supporting portion 32 Pressed portion 33 Supporting hole 34 Locking portion 35 Connection portion 36 Rib 37 Bending portion 38 Buffer material 39 Concave portion

Claims (5)

A pair of lower rails installed on the floor;
A pair of upper rails supported by the lower rail so as to be movable in the longitudinal direction of the rail and on which a seat is placed;
A control bar having a pair of arms inserted between the lower rail and the upper rail in the rail longitudinal direction;
A pair of lock plates attached to each of the upper rails;
With
The lock plate is made of an elastically flexible plate , has a support hole through which the arm is inserted, and supports the arm so as to be swingable in the rail height direction around the support hole. And a pressed part that is connected to the support part so as to be displaceable in the rail height direction and is elastically bent in the rail height direction by being pressed by the tip part of the arm. And
The pair of side walls of the lower rail that sandwich the pressed portion and the pressed portion in the rail width direction are provided with lock portions that are engaged with each other so as to be releasable by relative movement in the rail height direction.
A seat slide device in which a pair of ribs are erected along edges on both sides extending in the rail longitudinal direction at a connection portion between the lock portion and the support portion in the pressed portion. The seat slide device according to claim 1,
A seat slide device in which a tip part of the arm presses the connection part of the pressed part. The seat slide device according to claim 1 or 2,
The seat slide device, wherein the pressed portion is provided with a cushioning material that comes into contact with the tip of the arm. The seat slide device according to claim 3,
The cushioning material is disposed so as to protrude from the surface of the pressed part,
A seat slide device in which a recess into which the cushioning material is fitted is provided at the tip of the arm.   A vehicle seat comprising the seat slide device according to any one of claims 1 to 4.

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