Webbing take-up device

Patent metadata

Field	Value
Publication number	US-10513421-B2
Application number	US-201715663165-A
Country	US
Kind code	B2
Filing date	Jul 28, 2017
Priority date	Aug 1, 2016
Publication date	Dec 24, 2019
Grant date	Dec 24, 2019

Abstract

The present disclosure presents a webbing take-up device, which comprises: a spool; a lock section that is restricted from rotating at a time of a vehicle emergency so as to limit rotation of the spool in the pull-out direction; a force limiter mechanism that permits rotation of the spool in the pull-out direction at a force limiter load or greater when rotation of the spool in the pull-out direction with respect to the lock section is being limited; a switching member that switches a load value of the force limiter load by switching between a rotation-restricted state and a rotation-enabled state; and a mounting member that includes a switching member mounting section at which the switching member is disposed, and a restriction section that is engaged with the switching member so as to restrict displacement of the switching member disposed at the switching member mounting section.

First claim

What is claimed is:

1. A webbing take-up device, comprising:
a spool at which a webbing worn by an occupant is taken up, and that is rotated in a pull-out direction by the webbing being pulled out;
a lock section that is restricted from rotating at a time of a vehicle emergency so as to limit rotation of the spool in the pull-out direction;
a force limiter mechanism that permits rotation of the spool in the pull-out direction at a force limiter load or greater when rotation of the spool in the pull-out direction with respect to the lock section is being limited;
a switching member that switches a load value of the force limiter load by switching between a rotation-restricted state and a rotation-enabled state; and
a mounting member at which a restriction section is formed, the mounting member including a switching member mounting section at which the switching member is disposed, and the restriction section being engaged with the switching member so as to restrict displacement in a rotational axis direction of rotation of the switching member of the switching member disposed at the switching member mounting section.

2. The webbing take-up device of claim 1 , wherein the restriction section applies a bias toward the switching member side using a recovery force arising as a result of elastic deformation of the restriction section in a direction away from the switching member.

3. The webbing take-up device of claim 1 , wherein the restriction section is provided with a pressed portion that is configured to be pressed by a portion of the switching member in a rotational direction of the switching member when the switching member is rotated such that the pressed portion is moved in a direction away from the switching member.

4. The webbing take-up device of claim 3 , wherein the pressed portion has at least one of a first face configured to be pressed by the portion of the switching member and a second face configured to be pressed by the portion of the switching member, the first face being inclined with respect to the rotational direction and a radial direction of rotation of the switching member, and the second face being inclined with respect to the rotational direction and the rotational axis direction.

5. The webbing take-up device of claim 1 , wherein the restriction section is formed integrally with the mounting member.

Assignees

• Tokai Rika Co Ltd

Inventors

• Ushiyama Yoshihiko
• Ukita Masaru
• Yuasa Kaoru
• Miida Kosuke

Classifications

• B60R2022/287

  of torsion rods or tubes · CPC title

• B60R22/341 Primary

  comprising energy-absorbing means · CPC title

• B60R2022/288

  with means to adjust or regulate the amount of energy to be absorbed · CPC title

• B66D1/50 Primary

  for maintaining predetermined rope, cable, or chain tension, e.g. in ropes or cables for towing craft, in chains for anchors; Warping or mooring winch-cable tension control · CPC title

• B66D1/7489

  having a particular use, e.g. rope ascenders · CPC title