Webbing retracting device
AssigneeKabushiki Kaisha Tokai Rika Denki Seisakusho
InventorShinji MORI
Life of this patent
Estimating the term…
Abstract
A webbing retracting device that may prevent entering of an end-lock state when a spool rotates in the pull out direction on rebound just after completion of taking up of the webbing belt. A restriction weight is provided on a V gear. The restriction weight moves in the pull out direction relative to the V gear by acceleration when the V gear is rotated in the take up direction, and furthermore, the restriction weight pivots about a support pin under centrifugal force due to rotation of the V gear and attains a contact position. In such a state, even if the inertial mass attempts to displace toward the lock activation direction, the restriction weight interferes with the inertial mass and restricts displacement of the inertial mass toward the lock activation direction.
Claims8
A webbing retracting device comprising:
- a spool that, by rotation in a take up direction, takes up a longitudinal band-shaped webbing belt from a base end side of webbing belt and stores the webbing belt thereon;
- a rotational body provided so as to be able to rotate relative to the spool and connected to the spool so as to be able to rotate to follow rotation of the spool;
- a lock member that restricts rotation of the spool in a pull out direction by activation thereof;
- a rotation detection member, provided at the rotational body, that is displaced toward a predetermined lock activation direction to activate the lock member when the rotational body rotates in the pull out direction at a predetermined velocity or greater;
- and
- a restriction unit, provided at the rotational body, that restricts displacement of the rotation detection member toward the lock activation direction due to a rebound by stopping of taking up of the webbing belt to the spool,
- wherein the restriction unit is activated by centrifugal force generated by the rotating of rotational body.
Dependencies are inferred from the claim text.