Webbing take-up device

Patent metadata

Field	Value
Publication number	US-12454243-B2
Application number	US-202218147390-A
Country	US
Kind code	B2
Filing date	Dec 28, 2022
Priority date	Jan 12, 2022
Publication date	Oct 28, 2025
Grant date	Oct 28, 2025

Abstract

A webbing take-up device includes: a spool that enables pull-out and take-up of a webbing; a rotor disposed opposite from the spool, rotation of the rotor being impeded at a time of emergency; a wire of which a proximal end portion is retained at the rotor, at least a distal end portion of the wire being retained at the spool, the wire being disposed between the rotor and the spool, wherein the webbing is pulled out at a time of emergency of a vehicle, the wire being deformed and being wound onto a winding portion of the spool; and a retreat portion provided at the winding portion, the distal end portion of the wire being disposed at the retreat portion in a case in which the wire is wound onto the winding portion.

First claim

The invention claimed is:

1 . A webbing take-up device comprising:
a spool that enables pull-out and take-up of a webbing; a rotor disposed opposite from the spool, rotation of the rotor being impeded at a time of emergency; a wire of which a proximal end portion is retained at the rotor, the wire being disposed between the rotor and the spool, wherein, at a time of emergency, the wire is deformed and the webbing is pulled out, the wire being wound onto a winding portion of the spool; and a retreat portion toward which a distal end portion of the wire retreats in a case in which the wire is wound onto the winding portion, wherein: the winding portion is disposed at a flange of the spool, the flange is formed at one end side, in an axial direction, of the spool, and the winding portion is a rib that is formed along a circumference direction of the spool and that is protruded outwardly, in the axial direction, from the flange, and the retreat portion is formed in a sloped shape at one end portion, in the circumference direction, of the rib, and the one end portion is angled, in the axial direction, toward an outer surface of the flange such that a height, in the axial direction, of the retreat portion is tapered.

2 . The webbing take-up device according to claim 1 , wherein the retreat portion is formed in a recessed shape at a periphery of the winding portion.

3 . The webbing take-up device according to claim 1 , wherein the winding portion is recessed toward an inner side in a winding direction, at the winding portion at which the retreat portion is provided.

4 . The webbing take-up device according to claim 1 , wherein the retreat portion is formed at a periphery of an accommodation hole of the spool, the distal end portion of the wire being accommodated by the accommodation hole.

5 . The webbing take-up device according to claim 1 , wherein a plurality of wires are provided.

6 . A webbing take-up device comprising:
a spool that enables pull-out and take-up of a webbing; a rotor disposed opposite from the spool, rotation of the rotor being impeded at a time of emergency; a wire of which a proximal end portion is retained at the rotor, at least a distal end portion of the wire being retained at the spool, the wire being disposed between the rotor and the spool, wherein the webbing is pulled out at a time of emergency of a vehicle, the wire being deformed and being wound onto a winding portion of the spool; and a retreat portion provided at the winding portion, the distal end portion of the wire being disposed at the retreat portion in a case in which the wire is wound onto the winding portion, wherein: the winding portion is disposed at a flange of the spool, the flange is formed at one end side, in an axial direction, of the spool, and the winding portion is a rib that is formed along a circumference direction of the spool and that is protruded outwardly, in the axial direction, from the flange, and the retreat portion is formed in a sloped shape at one end portion, in the circumference direction, of the rib, and the one end portion is angled, in the axial direction, toward an outer surface of the flange such that a height, in the axial direction, of the retreat portion is tapered.

7 . The webbing take-up device according to claim 6 , wherein the retreat portion is formed in a recessed shape at a periphery of the winding portion.

8 . The webbing take-up device according to claim 6 , wherein the winding portion is recessed toward an inner side in a radial direction of the spool at a part of the winding portion at which the retreat portion is provided.

9 . The webbing take-up device according to claim 6 , wherein the retreat portion is formed at a periphery of an accommodation hole of the spool, the distal end portion of the wire being accommodated by the accommodation hole.

10 . The webbing take-up device according to claim 6 , wherein a plurality of wires are provided.

11 . The webbing take-up device according to claim 1 , wherein:
an accommodation hole is formed at the spool, a distal end portion of the wire is accommodated by the accommodation hole, and the sloped shape of the retreat portion connects up with the accommodation hole.

12 . The webbing take-up device according to claim 1 , wherein a width of the retreat portion in a radial direction of the spool is progressively decreased toward a distal end of the rib.

13 . The webbing take-up device according to claim 1 , wherein the retreat portion is recessed inwardly, in the axial direction, from the outer surface of the flange toward an inside, in the axial direction, of the flange.

14 . The webbing take-up device according to claim 6 , wherein:
an accommodation hole is formed at the spool, a distal end portion of the wire is accommodated by the accommodation hole, and the sloped shape of the retreat portion connects up with the accommodation hole.

15 . The webbing take-up device according to claim 6 , wherein a width of the retreat portion in a radial direction of the spool is progressively decreased toward a distal end of the rib.

16 . The webbing take-up device according to claim 6 , wherein the retreat portion is recessed inwardly, in the axial direction, from the outer surface of the flange toward an inside, in the axial direction, of the flange.

Assignees

• Tokai Rika Co Ltd

Inventors

• Yokoi Tomoya
• Muranaka Junichi
• SAKAGUCHI Yoshiteru
• Uchibori Hayato
• Suzuki Yuta

Classifications

• H02G11/02

  using take-up reel or drum · CPC title

• B60R22/341

  comprising energy-absorbing means · CPC title

• B60R2022/287

  of torsion rods or tubes · CPC title

• B60R2022/4647

  the driving means being a belt, a chain or the like · CPC title

• B60R22/4628 Primary

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