System for vehicle safety devices
First Claim
1. A vehicle safety system having a safety device for protecting a vehicle occupant from a vehicle collision, said safety device being rendered operative when a vehicle collision has occurred, said system comprising:
- a warning buzzer for producing a warning sound;
an energy supply circuit means for supplying electric energy for actuating an electrically fired element of the safety device, said energy supply circuit means having a voltage step-up circuit means in which an inductance element of said warning buzzer is incorporated so as to act as a coil element for generating a back electromotive force for a voltage step-up in response to an ON/OFF voltage signal;
a checking means for checking whether or not there is an abnormal condition in said system; and
an applying means responsive to said checking means for applying a signal with at least an audible frequency component to said voltage step-up circuit means when an abnormal condition has occurred in said system, whereby said warning buzzer produces a warning sound in accordance with the audible frequency component.
1 Assignment
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Accused Products
Abstract
In a vehicle safety system having a warning buzzer an inductance element of the buzzer is also used as a coil element for stepping up voltage in a voltage step-up circuit of an energy reservoir in which the electric energy required for actuating an electrically fired actuator of a safety device is stored in a capacitor of large capacity. The voltage step-up circuit is adapted to produce a high output voltage in response to the application of an appropriate ON/OFF signal. In the case where it is detected that an abnormal condition has arisen in the system, a signal having an audible frequency component is applied to the voltage step-up circuit, whereby the buzzer operates to generate a warning sound.
15 Citations
9 Claims
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1. A vehicle safety system having a safety device for protecting a vehicle occupant from a vehicle collision, said safety device being rendered operative when a vehicle collision has occurred, said system comprising:
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a warning buzzer for producing a warning sound; an energy supply circuit means for supplying electric energy for actuating an electrically fired element of the safety device, said energy supply circuit means having a voltage step-up circuit means in which an inductance element of said warning buzzer is incorporated so as to act as a coil element for generating a back electromotive force for a voltage step-up in response to an ON/OFF voltage signal; a checking means for checking whether or not there is an abnormal condition in said system; and an applying means responsive to said checking means for applying a signal with at least an audible frequency component to said voltage step-up circuit means when an abnormal condition has occurred in said system, whereby said warning buzzer produces a warning sound in accordance with the audible frequency component. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A vehicle safety system for protecting a vehicle occupant from a vehicle collision when a vehicle collision has occurred, said system comprising:
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a safety device for protecting a vehicle occupant from a shock produced by a vehicle collision, said safety device having an electrically fired element; a warning buzzer for producing a warning sound; a first generating means for generating a first signal which is an ON/OFF signal with a frequency higher than the audible frequency range; an energy supply circuit means for supplying electric energy necessary for actuating the electrically fired element, said energy supply circuit means having a voltage step-up circuit means in which an inductance element of said warning buzzer is incorporated so as to act as a coil element for generating a back electromotive force for a voltage step-up in response to the first signal; a controlling means for supplying the electric energy to the electrically fired element when a vehicle collision has occurred; a checking means for checking whether or not there is an abnormal condition in said system; and an applying means responsive to said checking means for applying a signal with at least an audible frequency component to said voltage step-up circuit means when an abnormal condition has occurred in said system, whereby said warning buzzer produces a warning sound in accordance with the audible frequency component. - View Dependent Claims (8, 9)
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Specification