Reclining device

Patent metadata

Field	Value
Publication number	US-11142104-B2
Application number	US-201916963525-A
Country	US
Kind code	B2
Filing date	Feb 21, 2019
Priority date	Feb 27, 2018
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

An object of the present invention is to provide a reclining apparatus in which when a pawl is in an unlocked position, orientation of the pawl is stable, and when the pawl moves to a locked position, meshing between outer teeth of the pawl and inner teeth of a first member is stable. The reclining apparatus has at least one second cam that is provided between a cam and a second pawl, and is pressed by the cam to press the second pawl. The reclining apparatus is provided with a spring or pressing the second pawl against a pawl guide protrusion.

First claim

The invention claimed is:

1. A reclining apparatus comprising:
a first member having inner teeth formed in a circumferential direction on its inner cylindrical surface;
a plurality of pawls having outer teeth meshable with the inner teeth;
a second member that is laminated on an outer cylindrical surface of the first member and is provided rotatable relative to the first member in the circumferential direction, and further has a plurality of pawl guides configured to guide the pawls between a locked position in which the outer teeth mesh with the inner teeth and an unlocked position in which the outer teeth are separated from the inner teeth;
a cam that is rotatably provided between the first member and the second member and causes the pawls to move toward the locked position; and
one or more second cams that are provided between the cam and one or more of the pawls, and are pressed by the cam to press the one or more of the pawls, wherein
each of the pawls is guided between two of the pawl guides,
when the pawls are in the locked position,
relative rotation between the first member and the second member is prohibited, and
the one or more second cams directly contacts and presses the one or more of the pawls in a direction toward one or more of the pawl guides to contact the one or more of the pawl guides, and
one or more springs directly contact and press the one or more of the pawls in the direction toward the one or more of the pawl guides to contact the one or more of the pawl guides,

wherein a recess into which one end of the one or more springs is inserted is formed in one or more other of the pawl guides.

2. The reclining apparatus according to claim 1 , wherein
at least two pawls out of the pawls are diagonally arranged,
wherein the one or more second cams are comprised of at least two second cams, and
the at least two second cams are respectively arranged between the cam and the diagonally arranged pawls.

3. The reclining apparatus according to claim 1 , wherein
the one end of the one or more springs presses the one or more of the pawls toward the one or more of the pawl guides, and
the other end of the spring is attached to the cam to urge the cam toward the locked position.

4. The reclining apparatus according to claim 3 , wherein the one end of the one or more springs is in direct contact with the one or more of the pawls.

5. The reclining apparatus according to claim 3 , wherein
in the locked position, there is a gap between the one end of the one or more springs and the recess in a direction opposite to a direction in which the one or more springs presses the pawl toward the one or more of the pawl guides.

Assignees

• Shiroki Corp

Inventors

• Maeda Noriaki
• Fujioka Hidehiko

Classifications

• G05G5/18

  by positive interengagement, e.g. by a pawl · CPC title

• B60N2/2356 Primary

  with internal pawls · CPC title

• B60N2/236 Primary

  linearly movable · CPC title

• A47C1/027

  by means of clamps or friction locking members · CPC title

• B60N2/20

  the back-rest being tiltable, e.g. to permit easy access (B60N2/04, B60N2/22 {, B60N2/3002} take precedence) · CPC title