Emergency lock type retractor

Details Emergency lock type retractor Emergency lock type retractor

1980-09-08

1982-05-25

Jillions, John M.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

A62B 3502, B65H 7548

Patent

active

043313043

ABSTRACT:
An emergency lock type retractor for a passive safety belt assembly of a vehicle includes a housing (1) mounted on the vehicle body, a reel (3) for the belt (4) rotatably supported by the housing and a ratchet wheel (7) secured to the reel. An inertia device (16) detects an emergent deceleration of the vehicle and causes a pawl (9) to engage with the ratchet wheel to lock the reel and prevent unwinding of the belt. The inertia device includes a first inertia member (19) perpendicularly suspended by the housing to assume a constant angle with respect to the vehicle body. The first inertia member supports a more sensitive second inertia member (22) which displaces relatively to the first inertia member as the vehicle is emergently decelerated. When the mounting angle of the housing varies with respect to the vehicle body, the first inertia member swings to stably maintain the second inertia member at a constant angular position with respect to the vehicle body.

REFERENCES:
patent: 3552676 (1971-01-01), Weber
patent: 3901461 (1975-08-01), Stephenson et al.
patent: 3995788 (1976-12-01), Stephenson et al.
patent: 4090678 (1978-05-01), Yamanashi
patent: 4193566 (1980-03-01), Inukai

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