Vehicle seat lifter device
First Claim
1. A vehicle seat lifter device comprising:
- a pinion gear which meshes with an input gear of a link mechanism which causes a seat to undergo lifting and lowering operations; and
a rotational control device which controls rotation of the pinion gear,wherein the rotational control device includesa rotating shaft which rotates in synchronization with the pinion gear,a rotation restriction mechanism including a first meshing member which rotates with the rotating shaft and a second meshing member which restricts rotation of the rotating shaft by meshing with the first meshing member,an input member which is linked to an operation handle to rotate around the rotating shaft,a release mechanism which releases the meshing of the first and second meshing members through rotation of the input member from a neutral position, anda braking mechanism which applies a braking force to the rotating shaft, wherein the braking mechanism is provided with a spring member in which a spring main body is fitted to the rotating shaft in a state of being in contact with an outer circumference of the rotating shaft based on an elastic force, and first and second spring end portions are disposed on an outside in a radial direction of the rotating shaft, where relative positions of the first and second spring end portions change and the spring main body warps in a diameter expanding direction due to the spring member rotating in a rotational direction of the rotating shaft,wherein the braking mechanism is configured such that, when the meshing of the first and second meshing members is released based on an operation of the release mechanism, relative positional variation of the first and second spring end portions which causes the spring main body to warp in the diameter expanding direction is restricted,wherein the braking mechanism includesa first engaging portion which restricts movement in a circumferential direction of the first spring end portion in a case in which the spring member rotates in a rotational direction of the rotating shaft,a holding lever which is axially supported to be capable of rotating around a support shaft and abuts against the second spring end portion in a case in which the spring member rotates in the rotational direction of the rotating shaft, anda stopper which restricts rotation of the holding lever when the meshing of the first and second meshing members is released based on an operation of the release mechanism through the stopper rotating integrally with the input member to move to a position in the circumferential direction at which the stopper abuts against the holding lever,wherein the holding lever is configured to restrict the movement in the circumferential direction of the second spring end portion in a case in which the holding lever is in a state in which the rotation around the support shaft is restricted, and to allow movement in the circumferential direction of the second spring end portion through the holding lever being pressed into the second spring end portion to rotate in a case in which the rotation around the support shaft is allowed, andwherein the stopper is configured to move to a position in the circumferential direction which allows the rotation of the holding lever through the input member rotating in excess of a rotational angle at which the second meshing member detaches from the first meshing member.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle seat lifter device includes: a pinion gear which meshes with an input gear of a link mechanism which causes a seat to undergo lifting and lowering operations; and a rotational control device which controls rotation of the pinion gear. The rotational control device includes a rotating shaft which rotates in synchronization with the pinion gear, a rotation restriction mechanism including a first meshing member which rotates with the rotating shaft and a second meshing member which restricts rotation of the rotating shaft by meshing with the first meshing member, an input member which is linked to an operation handle to rotate around the rotating shaft, a release mechanism which releases the meshing of the first and second meshing members through rotation of the input member from a neutral position, and a braking mechanism which applies a braking force to the rotating shaft.
32 Citations
4 Claims
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1. A vehicle seat lifter device comprising:
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a pinion gear which meshes with an input gear of a link mechanism which causes a seat to undergo lifting and lowering operations; and a rotational control device which controls rotation of the pinion gear, wherein the rotational control device includes a rotating shaft which rotates in synchronization with the pinion gear, a rotation restriction mechanism including a first meshing member which rotates with the rotating shaft and a second meshing member which restricts rotation of the rotating shaft by meshing with the first meshing member, an input member which is linked to an operation handle to rotate around the rotating shaft, a release mechanism which releases the meshing of the first and second meshing members through rotation of the input member from a neutral position, and a braking mechanism which applies a braking force to the rotating shaft, wherein the braking mechanism is provided with a spring member in which a spring main body is fitted to the rotating shaft in a state of being in contact with an outer circumference of the rotating shaft based on an elastic force, and first and second spring end portions are disposed on an outside in a radial direction of the rotating shaft, where relative positions of the first and second spring end portions change and the spring main body warps in a diameter expanding direction due to the spring member rotating in a rotational direction of the rotating shaft, wherein the braking mechanism is configured such that, when the meshing of the first and second meshing members is released based on an operation of the release mechanism, relative positional variation of the first and second spring end portions which causes the spring main body to warp in the diameter expanding direction is restricted, wherein the braking mechanism includes a first engaging portion which restricts movement in a circumferential direction of the first spring end portion in a case in which the spring member rotates in a rotational direction of the rotating shaft, a holding lever which is axially supported to be capable of rotating around a support shaft and abuts against the second spring end portion in a case in which the spring member rotates in the rotational direction of the rotating shaft, and a stopper which restricts rotation of the holding lever when the meshing of the first and second meshing members is released based on an operation of the release mechanism through the stopper rotating integrally with the input member to move to a position in the circumferential direction at which the stopper abuts against the holding lever, wherein the holding lever is configured to restrict the movement in the circumferential direction of the second spring end portion in a case in which the holding lever is in a state in which the rotation around the support shaft is restricted, and to allow movement in the circumferential direction of the second spring end portion through the holding lever being pressed into the second spring end portion to rotate in a case in which the rotation around the support shaft is allowed, and wherein the stopper is configured to move to a position in the circumferential direction which allows the rotation of the holding lever through the input member rotating in excess of a rotational angle at which the second meshing member detaches from the first meshing member. - View Dependent Claims (2, 3, 4)
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Specification