Burglarproof device for electronic equipment adapted to be mounted in vehicles
First Claim
1. A burglarproof device for electronic equipment adapted to be mounted in vehicles, which is detachably mounted in a vehicle and is supplied with power than an accessory switch, said electronic equipment having an operating panel detachably supported on a cover which is opened and closed,said burglarproof device comprising:
- accessory switch detection circuit means for detecting ON/OFF states of said accessory switch, andalarm generation circuit means for outputting an alarm signal informing that said electronic equipment adapted to be mounted in a vehicle is in an attached state when said accessory switch is in the OFF state, said alarm generation circuit means including drive circuit means for generating a drive signal for opening and closing said cover.
1 Assignment
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Accused Products
Abstract
A burglarproof device includes an accessory switch detection circuit for detecting ON/OFF states of an accessory switch provided in a vehicle. An accessory switch detection signal is sent to an alarm generation circuit. The alarm generation circuit generates an alarm signal when the accessory switch is in an OFF state. This alarm signal alarms that a detachable electronic equipment adapted to be mounted in vehicles which has been mounted in a vehicle is actually attached to the vehicle. This alarm informs a driver that he forgets detachment of the electronic equipment adapted to be mounted in vehicles, thus preventing burglarly.
14 Citations
11 Claims
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1. A burglarproof device for electronic equipment adapted to be mounted in vehicles, which is detachably mounted in a vehicle and is supplied with power than an accessory switch, said electronic equipment having an operating panel detachably supported on a cover which is opened and closed,
said burglarproof device comprising: -
accessory switch detection circuit means for detecting ON/OFF states of said accessory switch, and alarm generation circuit means for outputting an alarm signal informing that said electronic equipment adapted to be mounted in a vehicle is in an attached state when said accessory switch is in the OFF state, said alarm generation circuit means including drive circuit means for generating a drive signal for opening and closing said cover. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A burglarproof device for electronic equipment, adapted to be mounted in vehicles, which is detachably mounted in a vehicle and is supplied with power through an accessory switch, said burglarproof device comprising:
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accessory switch detection circuit means for detecting ON/OFF states of said accessory switch, and alarm generation circuit means for outputting an alarm signal informing that said electronic equipment is in an attached state when said accessory switch is in the OFF state, said alarm generation circuit means further comprising; timer means for outputting an alarm signal informing that said electronic equipment is in an attached state after a predetermined time passes from the time when said accessory switch is in an OFF state.
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11. A burglarproof device for electronic equipment, adapted to be mounted in vehicles, which is detachably mounted in a vehicle and is supplied with power through an accessory switch, said burglarproof device comprising:
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accessory switch detection circuit means for detecting ON/OFF states of said accessory switch, and alarm generation circuit means for outputting an alarm signal informing that said electronic equipment is in an attached state when said accessory switch is in the OFF state, said electronic equipment including an operating panel having an operating push-button adapted to generate a beep tone when depressed, said alarm tone generator means being constructed to generate an alarm tone having a sound volume larger than that of said beep tone.
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Specification