Seat belt retractor and seat belt apparatus employing the same

Abstract

In order to make a compact mechanism for preventing an end lock which can yet effectively prevent an end lock due to an engaging claw of a vehicle sensor, as a seat belt is withdrawn, an eccentric gear (14) of an ELR-ALR switching mechanism (25) eccentrically rotates at a reduced speed in the belt winding direction. During this, a third lever operation cam (18) disposed on the eccentric gear (14) rotates together with the eccentric gear (14). When an end lock preventive arm (43) of an end lock preventive lever (38) is set at an end lock prevention cancelling position shown by a solid line, the third lever operation cam (18) comes in contact with the unlocking lever (41) and presses the unlocking lever (41) when the seat belt (4) is fully or nearly fully wound. Accordingly, the end lock preventive lever (38) pivotally moves so that the end lock preventive arm (43) is set at an end lock preventing position shown by a two-dot chain line, thereby preventing an end lock due to a vehicle sensor (27).

Description

technical field [0001] The present invention relates to a seat belt retractor in a seat belt device mounted on a vehicle such as an automobile for constraining an occupant by a seat belt pulled out from the seat belt retractor, and to using the seat belt retractor and utilizing the seat belt retractor. The technical field of the seat belt device that restrains the occupant by the seat belt pulled out by the retractor, wherein the above seat belt retractor may cause end lock caused by vehicle sensor or end lock caused by vehicle sensor and webbing sensor, and at least has an emergency Locking function and automatic locking mechanism. Background technique [0002] In the conventional seat belt devices installed on the seats of vehicles such as automobiles, when a large deceleration acts on the vehicle in an emergency such as a collision, the seat belt restrains the occupant to prevent the occupant from being ejected from the seat. [0003] Usually, such seat belt arrangements...

AI Technical Summary

Problems solved by technology

When the seat belt retractor disclosed in this patent document 2 is used to cope with various designs of seat belt devices, since the stopper member and the cam plate are integrally formed of the same member, the stopper member and the cam plate are formed of the same member. Dedicated parts require the same number of types as design types, which not only increases the number of types of parts, but also increases the cost

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