Vehicle headrest sliding device

Patent metadata

Field	Value
Publication number	US-10427574-B2
Application number	US-201615778866-A
Country	US
Kind code	B2
Filing date	Nov 11, 2016
Priority date	Dec 23, 2015
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A device for sliding a headrest towards the front direction includes a ratchet and a release lever installed in a side link which is a movable part. A release protrusion is formed in the ratchet and disposed almost in parallel with the hinge shaft of the ratchet. The release protrusion of the ratchet is pushed up to release the locking so that the headrest is returned to its original position.

First claim

The invention claimed is:

1. A headrest sliding device comprising:
a lower side bracket wherein teeth are formed along the front to rear direction and being fixed to a stay;
a front side link whose lower portion is rotatably connected to a front side of the lower side bracket through a first front side hinge shaft;
a rear side link whose lower portion is rotatably connected to a rear side of the lower side bracket through a first rear side hinge shaft;
a left side link and a right side link connected to a left upper side and a right upper side of the front side link and the rear side link through a second front side hinge shaft and a second rear side hinge shaft, respectively;
a return spring for applying a restoring force to the front side link with respect to the lower side bracket;
a ratchet disposed in either one of the left side link and the right side link so as to be engaged with the teeth, and being supported by a hinge shaft of the ratchet having a rotation axis along the left to right direction;
a release protrusion formed in the ratchet and disposed almost in parallel with the hinge shaft of the ratchet; and
a release lever which is supported at either one of the left side link and the right side link wherein the ratchet is supported, and releases the gearing state by lifting up the release protrusion when an external force is applied thereto,
wherein the release lever comprises:
a release link supported at the release support plate through a third hinge shaft;
a release bottom plate formed in a first end of the release link and disposed in a lower surface of the release protrusion; and
a pressing plate, formed in a second end of the release link, to which the external force is applied.

2. The headrest sliding device according to claim 1 , wherein the left side link comprises:
a left side plate supported at the left upper side of the front side link and the rear side link;
a left coupling plate outwardly bent from the front of the left side plate; and
wherein the right side link comprises:
a right side plate supported at the right upper side of the front side link and the rear side link;
a right coupling plate outwardly bent from the front of the right side plate; and
a release support plate outwardly bent from a side of the rear of the right side plate and supporting the release lever, wherein the ratchet is disposed in an outer side of the right side plate.

3. The headrest sliding device according to claim 1 , wherein the front side link comprises:
a front plate;
a left front side plate and a right front side plate backwardly bent from the left side and the right side of the front plate respectively;
a left first front side hinge bracket, a right first front side hinge bracket, a left second front side hinge bracket, and a right second front side hinge bracket in a lower end and an upper end of the left front side plate and the right front side plate, wherein the first front side hinge shaft and the second front side hinge shaft are mounted respectively; and
wherein the rear side link comprises:
a rear plate;
a left rear side plate and a right rear side plate forwardly bent from the left side and the right side of the rear plate, respectively, so as to face the left front side plate and the right front side plate, respectively; and
a left first rear side hinge bracket and a right second rear side hinge bracket formed in a lower end and an upper end of the left rear side plate and the right rear side plate, respectively,
wherein the left front side plate and the right front side plate are in contact with upper sides of the left rear side plate and the right rear side plate respectively when the front side link and the rear side link are returned to their original position.

4. The headrest sliding device according to claim 3 , wherein protrusions are formed in the upper end surfaces of the left front side plate and the right front side plate, and slots are formed in upper end surfaces of the left rear side plate and the right rear side plate where the protrusions are contacted with.

Assignees

• Woobo Tech Co Ltd

Inventors

• Jeong Hae Il

Classifications

• B60N2/865 Primary

  providing a fore-and-aft movement with respect to the occupant's head · CPC title

• B60N2/80

  Head-rests · CPC title

• B60N2/929

  linear · CPC title

• B60N2002/952

  characterised by details of the locking system · CPC title