Seat belt retractor

Details Seat belt retractor Seat belt retractor

1990-04-12

1991-10-29

Jillions, John M.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

B65H 7548

Patent

active

050608835

ABSTRACT:
The seat belt retractor comprises a frame; a drum rotatably supported by the frame to wind up the seat belt therearound; an emergency lock mechanism; and a seat belt take-up mechanism including, in particular a coiled spring for applying a take-up force to the seat belt. Since a coiled spring is used to apply a take-up force to the seat belt, the take-up torque can be simply determined by changing the diameter of the coiled spring and the number of turns, without increasing the outer diameter of the coiled spring, thus improving the binding feeling of the seat belt to the driver. Further, the coiled spring is excellent in durability, low in cost and small in size as compared with the conventional flat spiral spring.

REFERENCES:
patent: 2814504 (1957-11-01), Campbell
patent: 3206137 (1965-09-01), Snyderman
patent: 3335974 (1967-08-01), Glauser
patent: 3338532 (1967-08-01), Board et al.
patent: 3493191 (1970-02-01), Hughes
patent: 3910625 (1975-10-01), Menard
patent: 4083510 (1978-04-01), Gomez
patent: 4159809 (1979-07-01), Rawson
patent: 4168810 (1979-09-01), Sack et al.
patent: 4447017 (1984-05-01), Inukai

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