Apparatus for reducing webbing wind-up force

Details Apparatus for reducing webbing wind-up force Apparatus for reducing webbing wind-up force

1985-11-14

1988-02-09

Levy, Stuart S.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

297475, B60R 2234, B65H 7548

Patent

active

047237287

ABSTRACT:
An apparatus for reducing webbing wind-up force has a ratchet which rotates together with a take-up shaft for winding up a webbing, a rocker arm with a pawl engageable with the ratchet, a bidirectional solenoid for causing the rocker arm to pivot, and a snap action spring. When an occupant has the webbing fastened, the bidirectional solenoid is activated for a predetermined period of time so that the pawl is engaged with the ratchet, and thereafter, the rocker arm is held in its engagement position by the action of the snap action spring. When the occupant unfastens the webbing, the bidirectional solenoid is activated for a predetermined period of time in the direction opposite to that in the above operation so that the pawl is disengaged from the ratchet, and thereafter, the rocker arm is held in its disengagement position by the action for the snap action spring. Thus, it is possible to reduce the amount of electric power consumed by the bidirectional solenoid.

REFERENCES:
patent: 2976959 (1961-03-01), Husted
patent: 4261530 (1981-04-01), Asai et al.
patent: 4467982 (1984-08-01), Tajima et al.
patent: 4511101 (1985-04-01), King
patent: 4534441 (1985-08-01), Kamijo et al.

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