Webbing take-up device
View Patent ↗A webbing take-up device includes a spool capable of taking-up webbing worn by an occupant, a V-gear capable of rotating accompanying rotation of the spool, a lock pawl that is operated to restrict rotation of the spool in a pull-out direction, and a W-pawl provided at the V-gear, that is displaced and causes the lock pawl to operate when the V-gear is rotated in the pull-out direction at a specific speed or greater. The webbing take-up device also includes a restricting body that is moved to a permitting position permitting displacement of the W-pawl when the V-gear is rotated in the pull-out direction, and that is moved to a restricting position enabling the W-pawl to abut when the V-gear is rotated in a take-up direction, restricting displacement of the W-pawl due to the W-pawl abutting, a contact angle with the W-pawl being set with 90 degrees or greater.
1. A webbing take-up device comprising:
a take-up shaft that is capable of taking up a webbing worn by an occupant, that is rotated in a take-up direction to take up the webbing, and that is rotated in a pull-out direction due to the webbing being pulled out;
a rotating body that is capable of rotating accompanying rotation of the take-up shaft;
a restricting member that restricts rotation of the take-up shaft in the pull-out direction by the restricting member being caused to be operated;
an operating member that is provided at the rotating body and that is displaced to cause the restricting member to operate when the rotating body is rotated in the pull-out direction at a speed equal to or faster than a specific speed; and
a restricting body that is moved to a permitting position permitting displacement of the operating member when the rotating body is rotated in the pull-out direction, and that is moved to a restricting position enabling the operating member to abut the restricting body when the rotating body is rotated in the take-up direction, the restricting body restricting displacement of the operating member due to the operating member abutting the restricting body,
wherein a contact angle of the restricting body and the operating member is set to be 90 degrees or greater, and
wherein a rigidity of the operating member at a location which is at a restricting body side is set lower than a rigidity of the operating member at a location which is further away from the restricting body than the location which is at the restricting body side of the operating member.
2. The webbing take-up device of claim 1 , wherein: restriction of the displacement of the operating member by the restricting body is released by the operating member and the restricting body making contact sliding; and at least a part of a face of the operating member, which makes contact sliding with the restricting body, is curved with a smaller radius than a radius of a face of the restricting body, which makes contact sliding with the operating member.
3. A webbing take-up device comprising:
a take-up shaft that is capable of taking up a webbing worn by an occupant, that is rotated in a take-up direction to take up the webbing, and that is rotated in a pull-out direction due to the webbing being pulled out;
a rotating body that is capable of rotating accompanying rotation of the take-up shaft;
a restricting member that restricts rotation of the take-up shaft in the pull-out direction by the restricting member being caused to be operated;
an operating member that is provided at the rotating body and that is displaced to cause the restricting member to operate when the rotating body is rotated in the pull-out direction at a specific speed or greater; and
a restricting body that is moved to a permitting position permitting displacement of the operating member when the rotating body is rotated in the pull-out direction, and that is moved to a restricting position enabling the operating member to abut the restricting body when the rotating body is rotated in the take-up direction, the restricting body restricting displacement of the operating member due to the operating member abutting the restricting body,
wherein a contact angle of the restricting body and the operating member is set to be 90 degrees or greater,
wherein restriction of the displacement of the operating member by the restricting body is released by the operating member and the restricting body making contact sliding; and at least a part of a face of the operating member, which makes contact sliding with the restricting body, is curved with a smaller radius than a radius of a face of the restricting body, which makes contact sliding with the operating member, and
wherein the operating member and the restricting body contact at a single point when the restricting body restricts displacement of the operating member.