Seat belt retraction and switch with peripheral internal gearing

Details Seat belt retraction and switch with peripheral internal gearing Seat belt retraction and switch with peripheral internal gearing

1989-07-05

1991-02-26

Scott, J. R.

Electricity: circuit makers and breakers

Special application

Actuated concurrently with operation or use of art device

2421074R, 475162, B65H 7500, F16H 5700, H01H 316

Patent

active

049963953

ABSTRACT:
A retractor is provided with a detector for the amount of a webbing wound on a retractor shaft. The detector is of the type that the amount of the webbing wound on the retractor shaft is determined on the basis of the number of revolutions which the retractor shaft has undergone. The retractor includes first and second internal gears, at least one planetary gear and a switch actuator. The first and second internal gears have different numbers of teeth, and are arranged side by side in the direction of an axis of the retractor shaft. The first internal gear is fixed on the base while the second internal gear is rotatably supported on the base. The planetary gear is provided on the retractor shaft and is maintained in meshing engagement with both the first and second internal gears. A switch actuator is formed on the second internal gear and a switch is provided on the base.

REFERENCES:
patent: 3406594 (1968-10-01), Pickles
patent: 3767134 (1973-10-01), Morales
patent: 3804192 (1974-04-01), Takada
patent: 3853284 (1974-12-01), Hasegawa et al.
patent: 3862727 (1975-01-01), Fisher
patent: 3876163 (1975-04-01), Kobrehel
patent: 3880379 (1975-04-01), Booth

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