Warning device for passive seat belt system

Details Warning device for passive seat belt system Warning device for passive seat belt system

1989-04-21

1990-07-24

Bertsch, Richard A.

Land vehicles

Wheeled

Attachment

297468, B60R 2200

Patent

active

049430874

ABSTRACT:
A warning device for a passive seat belt system is disclosed. It includes an emergency release buckle; a tongue; a magnet displaceable between a first position and a second position, said magnet assuming the first position while the tongue and buckle are latched but a second position while the tongue and buckle are unlatched; an anchor base member; and a magnetic flux sensor for detecting a magnetic flux from the magnet. In a preferred embodiment, the warning device further includes a magnetic shielding means made of a high-permeability material and allowing magnetic flux to pass under low magnetic resistance to the magnetic flux sensor except for an area on a magnetic-flux-travelling path extending from the magnet to the sensor. In another preferred embodiment, the magnet may be arranged between the anchor base member and the buckle.

REFERENCES:
patent: 4225155 (1980-09-01), Seiffert et al.
patent: 4681347 (1987-07-01), Tamura et al.
patent: 4697826 (1987-10-01), Morner
patent: 4717174 (1988-01-01), Nishimura

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