Seat belt retractor

Details Seat belt retractor Seat belt retractor

1993-01-25

1994-12-13

Jillions, John M.

Winding, tensioning, or guiding

Reeling device

With spring motor

2423845, B60R 2238, B60R 2240

Patent

active

053723279

ABSTRACT:
An inertia member (15) of a webbing sensor is set so that when it abuts on a first stopper (14h), the center of gravity (G) of the inertia member (15) lies at a position which is on an extension of an imaginary line (.gamma.) connecting the center of a first rotating shaft (4d) of a reel shaft (4) and the center of a shaft (14f) of a lock gear (14) at a side thereof closer to the shaft (14f) and which is a little apart from the shaft (14f). Thus, when the lock gear (14) rotates as the webbing (3) is unwound or wound up under normal circumstances, centrifugal force acts on the center of gravity of the inertia member (15), but since the line of action of the centrifugal force lies on the line (.gamma.), the inertia member (15) is not subjected to moment about the shaft (14f) by the centrifugal force. Therefore, there is no possibility of the inertia member ( 15) rotating about the shaft (14f) under normal circumstances. Consequently, there is no possibility that a pawl (15c) of the inertia member (15) will engage with a tooth (13c) and stop the reel shaft (4) undesirably.

REFERENCES:
patent: 4083511 (1978-04-01), Ikesue
patent: 4186895 (1980-02-01), Burghardt et al.
patent: 4190213 (1980-02-01), Ueda

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