Air bag device
First Claim
1. An air bag device provided in a cabin of a vehicle, comprising:
- an air bag disposed in said cabin;
an inflator for inflating said air bag;
an eddy current position sensor having a coil and a metal body, said coil and said metal body being disposed on opposite portions of said vehicle so as to face each other, one of said opposite portions being relatively easily deformable while the other of said opposite portions being more difficult to deform during a collision; and
an ignition control circuit including a resonance circuit having a resonance condition influenced by an inductance of said coil, the ignition control circuit being constructed and arranged to output an ignition command signal to said inflator based upon an output from said resonance circuit when said one portion is deformed.
1 Assignment
0 Petitions
Accused Products
Abstract
An air bag device is provided which uses an eddy current position sensor. A coil of the sensor is disposed on a seat frame or the like, as a portion of a vehicle body, which is difficult to deform at the beginning of a collision. A metal body as a detected body of the sensor is disposed on a portion, facing the coil, of a rocker panel, which is a portion of the vehicle body, that is easily deformable at the beginning of a collision. The sensor may be disposed at other portions, e.g. inside a pillar or a door. An inductance of the coil influences a resonance condition of a resonance circuit. An output of the resonance circuit is rectified by a rectifier circuit. An ignition control circuit detects an output of the rectifier circuit and outputs an ignition command signal to a squib of an inflator, based upon at least one of an output value and a change rate of the output value of the rectifier circuit, thereby inflating an air bag.
56 Citations
8 Claims
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1. An air bag device provided in a cabin of a vehicle, comprising:
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an air bag disposed in said cabin; an inflator for inflating said air bag; an eddy current position sensor having a coil and a metal body, said coil and said metal body being disposed on opposite portions of said vehicle so as to face each other, one of said opposite portions being relatively easily deformable while the other of said opposite portions being more difficult to deform during a collision; and an ignition control circuit including a resonance circuit having a resonance condition influenced by an inductance of said coil, the ignition control circuit being constructed and arranged to output an ignition command signal to said inflator based upon an output from said resonance circuit when said one portion is deformed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification