Reclining device

Patent metadata

Field	Value
Publication number	US-9903453-B2
Application number	US-201615226428-A
Country	US
Kind code	B2
Filing date	Aug 2, 2016
Priority date	Aug 7, 2015
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

A reclining device includes: a first member; a pawl having external teeth; a second member; a cam; and a spring, which biases the cam to move the pawl in the direction where the external teeth engage with the internal teeth, the pawl guide includes a first pawl guide and a second pawl guide, a wedge-shaped space is formed between the pawl and the first pawl guide, and a width of the wedge-shaped space is gradually reduced in a direction where the pawl is guided, an end of the spring is inserted into the wedge-shaped space, and the end of the spring is directly wedged into the wedge-shaped space, thereby pressing the pawl against the second pawl guide.

First claim

What is claimed is:

1. A reclining device, comprising:
a first member, which has internal teeth formed on an inner cylindrical surface along a circumferential direction and has a cylinder shape, in which one face is opened, having a bottom plane;
a pawl having external teeth, which are engageable with the internal teeth;
a second member, which is disposed at an opened side of the first member and which is formed to be rotatable relative to the first member in the circumferential direction, wherein the second member has a pawl guide that guides the pawl between a lock position where the external teeth engage with the internal teeth and an unlock position where the external teeth disengage from the internal teeth;
a cam, which is rotatably provided between the first and second members and moves the pawl in a direction where the external teeth engage with the internal teeth; and
a spring, which biases the cam to move the pawl in the direction where the external teeth engage with the internal teeth, so that the external teeth of the pawl engage with the internal teeth of the first member and the relative rotation between the first and second members is suppressed,
wherein the pawl guide includes a first pawl guide and a second pawl guide,
wherein a space is formed between the pawl and the first pawl guide,
wherein an end of the spring is inserted into the space, and
wherein the end of the spring directly presses the pawl against the second pawl guide.

2. The reclining device according to claim 1 , further comprising:
a release cam, which is rotatably formed between the first and second members and moves the pawl in a direction of the unlock position,
wherein the release cam, which releases the end of the spring from the space, before the pawl is moved in the direction of the unlock position.

3. The reclining device according to claim 1 ,
wherein the space is defined by a notch, the notch being formed only in the first pawl guide.

4. The reclining device according to claim 1 ,
wherein a width of the space is narrowed, in a direction where the pawl is guided, and
wherein the end of the spring is directly wedged into the space.

5. The reclining device according to claim 1 ,
wherein the space formed between the pawl and the first pawl guide is wedge-shaped.

Assignees

• Shiroki Corp

Inventors

• Maeda Noriaki
• Fujioka Hidehiko

Classifications

• A47C1/02

  Reclining or easy chairs · CPC title

• B60N2/2356

  with internal pawls · CPC title

• F16H31/004 Primary

  with pawls driven by a rotary cam · CPC title

• B60N2/236

  linearly movable · CPC title