JP7106793B2 - Sliding device for vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat slide device.

For example, a front seat of a vehicle is equipped with a slide device in order to change its position in the front-rear direction. In such a vehicle seat slide device, an upper rail attached to a seat cushion is combined with a lower rail fixed to a floor so as to be slidable in the front-rear direction, and a locking mechanism that can be released by operating an operation handle. is equipped with.

A lock mechanism in a sliding device for a vehicle seat generally includes a plurality of engagement holes arranged in the lower rail in the front-rear direction at a predetermined pitch, and an upper rail provided in the upper rail so as to be rotatable while being biased in the locking direction. a locking member engageable with selected ones of the mating holes and pivotable in an unlocking direction by operation of an operating handle disposed at the front of the seat. When changing the position of the seat in the front-rear direction, the operation handle is operated to move the seat in the front-rear direction while rotating the lock member in the unlocking direction, and the operating force on the handle is released. The locking member is rotated in the locking direction by an urging force and automatically engages with a predetermined engaging hole, thereby fixing the seat at the changed longitudinal position.

In the vehicle seat slide device disclosed in Patent Document 1, the operation force of an operation handle that can rotate about a rotation axis extending in the vehicle width direction is applied to a rotation axis that also extends in the vehicle width direction. It is configured to transmit to a lock member rotatable in the vehicle width direction about a support shaft extending in the vehicle front-rear direction via a link member rotatable in a seesaw.

In the vehicle seat slide device shown in the document, the link member is interposed in the process of transmitting the operating force from the operating handle to the lock member, which increases the number of members, and the play between each member is superimposed. There is a problem that the operational feeling is deteriorated.

JP-A-10-264685

SUMMARY OF THE INVENTION The present invention has been devised under the circumstances described above. An object of the present invention is to provide a seat slide device.

In order to solve the above problems, the present invention employs the following technical means.

That is, a vehicle seat slide device provided by the present invention includes a lower rail fixed to a floor, and an upper rail attached to a seat cushion and combined with the lower rail so as to be movable in the front-rear direction. The upper rail is provided with a handle rotatable about a rotation axis extending in the vehicle width direction, and a rotation handle extending in the front-rear direction. a locking claw rotatable about an axis in a locking direction and an unlocking direction, and rotatable in the locking direction to engage with a selected one of the plurality of engagement holes; A sliding device for a vehicle seat, provided with a locking member that is rotated in an unlocking direction by transmission of an operating force to a handle, wherein the locking member receives at least an operating force from the handle. It is supported by the rotation axis extending in the longitudinal direction at a longitudinal position corresponding to the input portion or its vicinity and a longitudinal position corresponding to the lock claw or its vicinity.

According to the above configuration, since the operating force to the handle is directly transmitted to the lock member, an intermediate link member between the handle and the lock member can be omitted, and the number of members can be reduced. In addition, the play generated in the transmission of the operating force between the members does not overlap more than necessary, and a direct operational feeling can be obtained.

In addition, since the lock member is supported on the rotation axis in at least two places in the front-rear direction, namely, the input portion that receives the operation force from the handle or its vicinity, and the lock claw or its vicinity, the lock member is supported in the front-rear direction. Even if the length has to be relatively long, the rotation about the rotation axis can be performed with little rattling, which also improves the operational feeling.

Other features and advantages of the invention will become more apparent from the detailed description that follows with reference to the drawings.

FIG. 3 is a side view, partly shown in phantom lines, showing a sliding device for a vehicle seat according to an embodiment of the present invention, and corresponds to a cross-sectional view taken along line II in FIG. 2 ; FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1; FIG. 3 is an operation explanatory view of the vehicle seat slide device shown in FIGS. 1 and 2, and corresponds to a cross-sectional view taken along line II-II in FIG. 1;

Preferred embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a side view showing a sliding device A1 for a vehicle seat according to an embodiment of the present invention, partly shown in phantom lines for easy understanding. A sliding device A1 for a vehicle seat includes a lower rail 1 fixed to a floor F, and an upper rail 2 attached to a seat cushion 3 and combined with the lower rail 1 so as to be movable in the longitudinal direction. A pair of these lower rails 1 and upper rails 2 are provided on the lower portions of the seat cushion 3 on both sides in the vehicle width direction.

As shown in FIG. 2, the lower rail 1 includes a bottom wall portion 11, a pair of side wall portions 12 rising upward from both sides of the bottom wall portion 11 in the vehicle width direction, and a pair of side wall portions 12 extending upward from the upper ends of the side wall portions 12 in the vehicle width direction. It is a sheet metal member having a pair of upper wall portions 13 that are bent toward each other and a pair of hanging wall portions 14 that are bent downward from the inner edge of the upper wall portion 13, and has a substantially uniform cross section and a predetermined length in the vehicle front-rear direction. It has a length and extends. This lower rail 1 is fixed to the floor F at the bottom wall portion 11 .

As shown in FIG. 2, the upper rail 2 includes an upper wall portion 21, a pair of side wall portions 22 hanging down from both sides of the upper wall portion 21 in the vehicle width direction, and lower rails 1 extending from the lower ends of the pair of side wall portions 22. A sheet metal member having a pair of rising wall portions 23 that wrap around the lower ends of the pair of hanging wall portions 14 and bend into a U-shaped cross section. have and extend. The upper rail 2 is attached to the seat cushion 3 at the upper wall portion 21 .

The lower rail 1 and the upper rail 2 are combined so as to be slidable in the longitudinal direction, that is, in the longitudinal direction, by a linear bearing structure (not shown) formed at an appropriate position in the longitudinal direction.

A lock mechanism 4, which will be described below, is provided on one or both of the pair of left and right lower rails 1 and upper rails 2. As shown in FIG.

The lock mechanism 4 includes a plurality of engagement holes 141 arranged in the longitudinal direction in the lower rail 1, a handle 5 attached to the upper rail 2, and a lock that is also attached to the upper rail 2 and unlocked by operating the handle 5. a member 6;

In this embodiment, the plurality of engaging holes 141 have the same rectangular shape and are formed in the hanging wall portion 14 of the lower rail 1 .

The handle 5 is a metal member extending rearward inside the upper rail 2 with an operation portion 51 facing the front portion of the seat cushion 3. At the rear end portion 5a, a rotation axis 52 extending in the vehicle width direction is provided. is supported so as to be rotatable in the vertical direction. The handle 5 has an action portion 53 formed in its longitudinally intermediate portion for transmitting an operating force to the lock member 6 by abutting from below an input portion 61 of the lock member 6, which will be described in detail later.

The lock member 6 is supported so as to be rotatable in the vehicle width direction around a rotation axis 62 extending in the vehicle front-rear direction. In this embodiment, the lock member 6 is a sheet metal member extending in the longitudinal direction of the vehicle inside the upper rail 2, and the action portion 53 of the handle 5 contacts the front portion of the plate-like body portion 60 from below. An input portion 61 that receives an operation force from the handle 5 has a lock claw 63 that can be engaged with the plurality of engagement holes 141 formed in the lower rail 1 from the inside to the outside in the vehicle width direction. is provided. In the present embodiment, four lock claws 63 are arranged at the same pitch as the formation pitch of the plurality of engagement holes 141 so as to be able to engage with four engagement holes 141 adjacent in the front-rear direction.

In this embodiment, a support shaft 62a extending in the longitudinal direction of the vehicle is supported on the upper wall portion 21 of the upper rail 2 so as to be axially immovable and axially rotatable, and the support shaft 62a extends above the lock member 6. By connecting the stays 641 and 642, as described above, the lock member 6 is rotatably supported in the vehicle width direction around the rotation axis 62 extending in the vehicle front-rear direction. In this embodiment, the lock member 6 is supported by the support shaft 62a via stays 641 and 642 at two front and rear locations. through hole 211 is formed.

By the way, in the present invention, the lock member 6 can be positioned at a position corresponding to the input portion 61 or its vicinity and a position corresponding to the lock claw 63 or its vicinity with respect to the position in the longitudinal direction of the vehicle. The most distinctive feature is that it is connected to the core 62, that is, the support shaft 62a. That is, in forming the lock member 6, a front stay 641 is formed as close as possible to the input portion 61 in the longitudinal direction of the vehicle, and a rear stay 642 is formed as close as possible to the lock claw 63, and these stays 641 and 642 rotate. It is connected to the support shaft 62 a as the driving shaft 62 .

2 and 3 are explanatory diagrams viewed in the front-rear direction of the vehicle showing the relationship between the rotation axis 62 of the lock member 6, the input portion 61, the lock claw 63, and the engagement hole 141 of the lower rail 1. As for the handle 5, only the acting portion 53 is indicated by a phantom line.

The rotation axis 62 of the lock member 6 is arranged near the hanging wall portion 14 of the lower rail 1 provided with a plurality of engagement holes 141 in the upper wall portion 21 of the upper rail 2 . 60 extends inside the upper rail 2, and a lock claw 63 is formed so as to protrude from the plate-shaped main body portion 60 in the vehicle width direction. The input portion 61 is formed above the lock claw 63 so as to protrude from the plate-like body portion 60 in a direction opposite to the projection direction of the lock claw 63 . As shown in FIG. 3, the side wall portion 22 of the upper rail 2 is formed with a through hole 221 for projecting the lock claw 63 from the inside of the upper rail 2 to the outside. Further, the lock claw 63 is attached to the plate-like body portion 60 so as to smoothly engage and disengage from the engagement hole 141 without interfering with the edge of the engagement hole 141 of the lower rail 1 when the lock member 6 rotates. It is formed so as to protrude at an acute angle to it. That is, when the lock member 6 assumes the lock position shown in FIG. 2, the lock claw 63 protrudes so that the base end is slightly lower than the tip end. As described above, the input portion 61 is formed at the front portion of the lock member 6, and the lock claw 63 is formed at the rear portion of the lock member 6. As shown in FIG.

The lock member 6 has a lock position where the lock claw 63 is engaged with the engagement hole 141 as shown in FIG. It is rotatable about a rotation axis 62 (support shaft 62a) between the unlocked position and is constantly urged to rotate toward the locked position by an elastic member (not shown).

Next, the operation of the vehicle seat slide device A1 having the above configuration will be described.

Normally, the lock member 6 is in the lock position. At this time, the lock claws 63 are engaged with any four of the plurality of engagement holes 141 of the lower rail 1, as shown in FIG. , is locked so that it cannot move forward or backward.

When the operation portion 51 of the handle 5 is pulled upward, the handle 5 rotates upward around a rotation axis 52 extending in the vehicle width direction, and accordingly, the action portion 53 of the handle 5 engages the lock member 6. It abuts on the portion 61 from below and pushes it up. Then, as shown in FIG. 3 , the lock member 6 is rotated to the unlocked position about the rotation axis 62 extending in the longitudinal direction of the vehicle, and the lock claw 63 is disengaged from the engagement hole 141 . In this state, the upper rail 2 and the seat cushion 3 are movable in the longitudinal direction. When the upper rail 2 and the seat cushion 3 are moved to a desired longitudinal position and the lifting force on the handle 5 is released, the handle 5 rotates downward, the lifting force on the input portion 61 of the lock member 6 is also released, and the lock member is released. 6 is rotated to the locking position shown in FIG. 2 by the elasticity of an elastic member (not shown), the locking claw 63 is engaged with the engaging hole 141, and the upper rail 2 and the seat cushion 3 are again at the selected longitudinal position. immovably locked.

In the above operation, since the input portion 61 of the lock member 6 is provided above the lock claw 63, the amount of movement of the lock claw 63 in the unlocking direction is sufficient compared to the amount of lifting with respect to the input portion 61. can be secured, and a reliable unlocking operation can be performed.

Further, since the operating force to the handle 5 is directly transmitted to the lock member 6, an intermediate link member between the handle 5 and the lock member 6 can be omitted, and the number of members can be reduced. In addition, the play generated in the transmission of the operating force between the members does not overlap more than necessary, and a direct operational feeling can be obtained.

Further, the lock member 6 is supported by the support shaft 62a at least at two points in the front-rear direction, namely, the input portion 61 or its vicinity that receives the operation force from the handle 5, and the lock claw 63 or its vicinity. Even in the case where the front-rear direction length of 6 has to be relatively long, it is possible to rotate around the rotation axis 62 with little rattling, which also improves the operational feeling. do.

Of course, the present invention is not limited to the above-described embodiments, and all design changes within the scope of matters described in the claims are included in the scope of the present invention.

For example, in making the lock member 6 rotatable about the rotation axis 62, in the embodiment, a support shaft 62a is supported on the upper rail 2 so as to be axially immovable and axially rotatable. Although the lock member 6 is supported, the support shaft 62a may be fixedly provided and the lock member 6 may be rotatably supported with respect to the support shaft 62a.

Moreover, in the embodiment, two stays 641 and 642 for supporting the lock member 6 on the support shaft 62a are provided, but three or more stays may be provided. However, the two stays 641 and 642 among them may be provided at a position as close as possible to the input portion 61 and a position as close as possible to the lock claw 63 in the longitudinal direction of the vehicle, as described above.

A1 Vehicle seat sliding device F Floor 1 Lower rail 11 Bottom wall 12 Side wall 13 Upper wall 14 Hanging wall 141 Engagement hole 2 Upper rail 21 Upper wall 211 Through hole 22 Side wall 221 Through hole 23 Rising wall 3 seat cushion 4 lock mechanism 5 handle 5a rear end 51 operation portion 52 rotation axis 53 action portion 6 lock member 60 plate-like body portion 61 input portion 62 rotation axis 62a support shaft 63 lock claw 641 stay (front)
642 stay (rear)

Claims (1)

A lower rail fixed to the floor and an upper rail attached to the seat cushion and combined with the lower rail so as to be movable in the front-rear direction, the lower rail being formed with a plurality of engaging holes arranged in the front-rear direction. The upper rail is provided with a handle rotatable about a rotation axis extending in the vehicle width direction, and a handle rotatable about a rotation axis extending in the longitudinal direction in the locking direction and the unlocking direction. It has a lock pawl that can be rotated in the locking direction and engages with a selected one of the plurality of engagement holes, and is rotated in the unlocking direction when the operating force to the handle is transmitted. A vehicle seat sliding device having a locking member attached thereto,
The lock member has a rotation shaft extending in the front-rear direction at least at a front-rear position corresponding to an input portion receiving an operation force from the handle or its vicinity, and at a front-rear position corresponding to the lock claw or its vicinity. heartily supported ,
A slide device for a vehicle seat, wherein the input portion of the lock member and the lock claw are set at positions spaced apart in the front-rear direction with respect to the center of rotation of the handle .

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