Patent Number: 6,305,633

Title: Webbing take-up device

Abstract: There is provided a webbing take-up device of which weight can be reduced while maintaining lock strength. A single lock plate which is engaged with an internal gear ratchet at the time of sudden deceleration of a vehicle is held in an accommodating portion formed in a holding portion of a base lock. At the time of sudden deceleration of a vehicle, the lock plate is moved by being guided in a guide hole of a V gear and is engaged with the internal gear ratchet. Further, reaction force generated in the above-described engagement is utilized and the holding portion of the base lock is caused to contact by pressure the internal gear ratchet and the base lock plastically deforms and is thereby engaged with the internal gear ratchet. Accordingly, the base lock and the internal gear ratchet are in a locked state at two facing locations on the base lock in a radial direction of the base lock. In addition, since only one lock plate is used, the weight of the device can be reduced while maintaining the lock strength thereof.

Inventors: Asagiri; Katsuki (Aichi-ken, JP), Sumiyashiki; Akira (Aichi-ken, JP)

Assignee: Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho

International Classification: B60R 22/38 (20060101); B60R 22/34 (20060101); B60R 022/38 (); B65H 075/48 ()

Expiration Date: 10/23/2018