Webbing take-up device

Patent metadata

Field	Value
Publication number	US-2020282948-A1
Application number	US-201716305615-A
Country	US
Kind code	A1
Filing date	Jun 7, 2017
Priority date	Jun 9, 2016
Publication date	Sep 10, 2020
Grant date	—

Abstract

In a webbing take-up device, when a rotating member is rotated in a take-up direction in a state in which first engagement teeth and second engagement teeth of a rotating member are digging or biting into a moving member, the moving member is pressed by the first engagement teeth and the second engagement teeth of the rotating member. The moving member thus expands into a first deformation-permitting portion and a second deformation-permitting portion in a cover plate, and expanded portions of the moving member oppose a first restriction portion configured by an axial center direction leading end face of a cylinder, and a second restriction portion of the cover plate.

First claim

1 . A webbing take-up device comprising:
a spool that takes up a webbing of a seatbelt device by being rotated in a take-up direction, and that is applied with rotation force in a pull-out direction opposite to the take-up direction when the webbing is pulled; a rotating member that, when rotated toward one side, rotates the spool in the take-up direction, and that is rotated toward another side by rotation of the spool in the pull-out direction; a moving member that is moved toward an axial direction leading end side in a vehicle emergency so as to engage with the rotating member, that rotates the rotating member toward the one side, and that is capable of deforming in a direction intersecting the axial direction; and a restriction portion that engages with a deformed portion of the moving member so as to restrict movement of the moving member toward an axial direction base end side.

2 . The webbing take-up device of claim 1 , further comprising a tube-shaped member, wherein:
the moving member is disposed inside the tube-shaped member, and one end of the tube-shaped member is open at a side of the rotating member; under pressure of a fluid supplied to another end side of the moving member, the moving member is moved toward the axial direction leading end side and is moved outward from the one end of the tube-shaped member so as to engage with the rotating member; the rotating member includes an engagement portion that engages with the moving member, the engagement portion has an engagement range with the moving member, and the engagement range increases and decreases due to rotation of the rotating member accompanying movement of the moving member toward the axial direction leading end side; and the restriction portion is provided between a rotation position of the engagement portion where the engagement range between the engagement portion of the rotating member and the moving member is at its greatest, and the one end of the tube-shaped member.

3 . The webbing take-up device of claim 1 , further comprising:
a guide section guiding the moving member that has moved in a vehicle emergency, the guide section being provided with a deformation-permitting portion that is configured to permit deformation of the moving member further toward the axial direction leading end side than the restriction portion.

4 . The webbing take-up device of claim 3 , wherein the restriction portion is provided at the guide section.

5 . The webbing take-up device of claim 2 , wherein the restriction portion is provided at a portion of the one end of the tube-shaped member.

6 . The webbing take-up device of claim 5 , wherein the restriction portion is configured as a face of the one end of the tube-shaped member, and the moving member is capable of deforming toward a radial direction outer side of the tube-shaped member at an outer side of the face of the one end of the tube-shaped member.

7 . The webbing take-up device of claim 2 , further comprising:
a guide section guiding the moving member that has moved in a vehicle emergency, the guide section being provided with a deformation-permitting portion that is configured to permit deformation of the moving member further toward the axial direction leading end side than the restriction portion.

8 . The webbing take-up device of claim 7 , wherein the restriction portion is provided at the guide section.

9 . The webbing take-up device of claim 3 , wherein the restriction portion is provided at a portion of the one end of the tube-shaped member.

10 . The webbing take-up device of claim 9 , wherein the restriction portion is configured as a face of the one end of the tube-shaped member, and the moving member is capable of deforming toward a radial direction outer side of the tube-shaped member at an outer side of the face of the one end of the tube-shaped member.

Assignees

• Tokai Rika Co Ltd

Inventors

• Yanagawa Wataru
• Okubo Shinichi

Classifications

• B60R2022/4642

  the gas directly propelling a flexible driving means, e.g. a plurality of successive masses, in a tubular chamber · CPC title

• B60R22/4676

  comprising energy-absorbing means operating between belt reel and retractor frame · CPC title

• B60R22/4633 Primary

  Linear actuators, e.g. comprising a piston moving along reel axis and rotating along its own axis · CPC title

• B60R22/4628 Primary

  characterised by fluid actuators, e.g. pyrotechnic gas generators (actuating a cable B60R22/4619) · CPC title

• B60R22/46

  {Reels} with means to tension the belt in an emergency {by forced winding up}(electrical circuits for triggering safety arrangements B60R21/01 {; tensioners using reels only guiding the belt during normal use, e.g. splitted reels B60R22/195}) · CPC title