Webbing take-up device

摘要

In a webbing take-up device, configuration is made such that in a state in which a restriction wall of a cam gear is positioned at a lateral the side of a pin of a link configuring a switching section, the restriction wall abuts the pin when the link attempts to move. The restriction wall does not actively move the link regardless of the number of revolutions made by the cam gear. Operation noise of the link, a stopper pawl and a slide stopper accordingly does not occur during pull-out and take-up of webbing during normal usage, and a desirable user sensation is achieved in pull-out and take-up of the webbing during normal usage.

主权项

1. A webbing take-up device comprising:
a spool that is rotated in a pull-out direction by a webbing that is taken up thereon being pulled out; an energy absorption shaft member that has one end connected to the spool in a state in which relative rotation with respect to the spool is restricted, and that is deformed by a portion of the energy absorption shaft member connected to the spool rotating relative to another end of the energy absorption shaft member; a rotatable lock ring that, by being actuated, is connected to the another end of the energy absorption shaft member in a state in which relative rotation with respect to the another end of the energy absorption shaft member is restricted, and that is capable of rotating together with the energy absorption shaft member; a switching section that, by engaging with the rotatable lock ring at an engaged position, restricts rotation of the rotatable lock ring accompanying rotation of the spool in the pull-out direction, that releases engagement with respect to the rotatable lock ring at a disengaged position which is apart from the engaged position, and that moves in a switching direction, which is from the engaged position toward the disengaged position or from the disengaged position toward the engaged position, interlockingly with rotation of the rotatable lock ring accompanying rotation of the spool in the pull-out direction; and a switching restriction member that rotates interlockingly with the spool, and that includes a switching restriction portion that faces the switching section at the switching direction side of the switching section at a specific position along an angular range of movement of the switching restriction member so that the switching restriction portion restricts movement of the switching section towards the switching direction when moved within said angular range.