CN2202685Y - Theft-proof device for vehicles - Google Patents

Abstract

The utility model relates to a theft-proof device for a vehicle, mainly composed of an integrated circuit control device, an alarm, a vibration detector, a voltage detector, and a control circuit device. The control circuit device is composed of a plurality of relays, a power switch, a transistor, a diode, a voltage regulator, and a voltage retainer. The utility model can use the locking and unlocking state of a key for the vehicle to operate and control the warning state of the theft-proof device for a vehicle and the warning cancelling state, and the theft-proof device for a vehicle is forced to cancel the warning state. The utility model has low cost and convenient operation, and the utility model is free from the external interference.

Description

Theft-proof device for vehicles

The utility model relates to a kind of vehicle anti-theft device that is used for, and particularly a kind of open and close operation control circuit device of automobile-used startup key that directly utilizes makes the vehicle anti-theft device enter the vehicle anti-theft device of the warning or the releasing state of alert.

Representative type vehicle anti-theft device uses the button device, because it relates to computer applications, and the price height, the change of key passwords is difficult for learning by heart.Another kind of vehicle anti-theft device uses radio remote controller, but it may be subjected to the frequency interference of device such as radio telephone, can make the misoperation of vehicle anti-theft device or cause receive bad.Also have a kind of vehicle anti-theft device to use infrared remote control, but infrared ray can be disturbed by the sunshine high light, influences normal remote control distance.In addition, infrared remote control also has the receiving angle problem, uses infrared remote control, must make infrared remote control aim at infrared receiver, for this reason, must use trouble around to headstock or tailstock operation infrared remote control.

The purpose of this utility model is to provide the vehicle anti-theft device of the open and close operation control circuit device of the automobile-used startup key of a kind of direct usefulness, and control vehicle anti-theft device enters the state of alert, has improved the defective of prior art.

The purpose of this utility model is achieved in that a kind of vehicle anti-theft device, mainly constitute by integrated circuit controller, vibrating detector, piezoelectric detector, annunciator and control circuit device, it is characterized in that: in the control circuit device, source switch connects relay, relay connects diode, voltage stabilizer, diode and voltage retainer and integrated circuit controller successively, source switch also connects the emitter of aerotron, and the base stage of aerotron connects integrated circuit controller.

The purpose of this utility model also is achieved in that an engine motor controller that is made of aerotron, resistance, relay between source switch and the integrated circuit controller.

The vehicle anti-theft device that the utility model provides, can directly utilize the open and close state of operation control vehicle anti-theft device of automobile-used startup key to enter warning or remove the state of alert, also can make the vehicle anti-theft device be compulsorily entered into the releasing state of alert, with low cost, easy and simple to handle and be not subjected to external interference.

Below in conjunction with accompanying drawing the utility model is done further narration.

Accompanying drawing is schematic circuit diagram of the present utility model.

With reference to accompanying drawing, use the open and close operation of automobile-used startup key can make source switch 1 be open-circuit condition or closed circuit state.When relay 2 goes to the position of turning off power supply on vehicle because of automobile-used startup key, and then make source switch 1 be open-circuit condition, 2 on relay is in normally off, then the Vehicular battery power supply is via the normally closed contact NC of relay 2, diode 12, voltage stabilizer 3, diode 13 are powered at integrated circuit controller 7, make the vehicle anti-theft device enter the state of alert, and export a signal from 01 mouth of integrated circuit controller 7 and be conducted to annunciator 9, produce an expression car and entered the voice prompt of the antitheft state of alert.In this case, normally the driver has turned off power supply on vehicle and has taken out key, and allow car enter the theft-proof state of alert this moment is rational.

When automobile-used key goes to the position of unlatching power supply on vehicle so that source switch 1 is closed circuit state, relay 2 is by excitatory and be in normally open, the No normal opened contact is connected to have cut off and is supplied with the required power supply of integrated circuit controller 7, make the vehicle anti-theft device be in the releasing state of alert, and export a signal from 02 mouth of integrated circuit controller and be conducted to annunciator 9, produce the voice prompt that the antitheft state of alert is removed in an expression, in this case, normally the driver has opened power supply on vehicle and has prepared and set out on a journey, and allow car remove the antitheft state of alert this moment is rational.

Sometimes, turn off that promptly to allow car enter the antitheft state of alert behind the power supply on vehicle be not only to some situation.For example: car will refuel, the driver is temporarily from car etc.These the time can go to by the position of turning off power supply on vehicle with automobile-used key and stop a specific blink after opening the power supply on vehicle position, again automobile-used key is gone to when turning off the power supply on vehicle position, impel 11 ' input end of collector controller to obtain one and change the impulse singla that logic low becomes a logic high again into by logic high.Integrated circuit controller 7 pulse enable signal vehicle anti-theft device in view of the above forces the releasing state of alert.As for specific blink of length, be decided by the selection of size of the capacitance of voltage retainer 8.When capacitance was big, then specific blink was long.

When the vehicle anti-theft device is on the alert, if vibrating detector 5 or piezoelectric detector 6 detect when there is something special, 01 mouth of integrated circuit controller 7 outputs signal to annunciator 9 with the continuous several seconds, to produce the siren sound, 03 mouth of integrated circuit controller 7 changes into a logic high by a logic low.

During normal circumstances, 03 mouth of integrated circuit controller is a logic low, when alerting signal takes place, 03 mouth changes logic high into by logic low, therefore aerotron 4 not turn-on relay 2 to be in NC point be normally off, allow the Vehicular battery power supply still to keep and be conducted to integrated circuit controller, so can make the vehicle anti-theft device continue to keep the state of alert.

For anti-car stealer passes to engine with power lead and car is driven away.03 mouth at integrated circuit controller connects an engine start motor controller; The engine start motor controller mainly comprises aerotron 11, when resistance 10, relay 14, normal circumstances, because 03 mouth of integrated circuit controller is a logic low, so aerotron 11 not conductings, relay 14 is in normally off, can not influence the normal running of car.When alarm signal takes place, because 03 mouth changes logic high into by logic low, aerotron 11 conductings, relay 14 is made the power lead that is conducted to engine start motor 15 be cut off by the excitatory normally open that is in.So, if there is the car stealer to use, also obviously can not starts the engine and car is driven away without source switch 1 and directly with power connection, this moment, the annunciator police whistle sound sounded still more.Integrated circuit controller 7 has two ends to connect vibrating detector 5 and piezoelectric detector 6 respectively.

Claims (2)

1, a kind of vehicle anti-theft device, constitute by integrated circuit controller (7), vibrating detector (5), piezoelectric detector (6), annunciator (9) and control circuit device, it is characterized in that: source switch in the control circuit device (1) connects relay (2), relay (2) and connects the emitter that diode (12), voltage stabilizer (3), diode (13) and voltage retainer (8) and integrated circuit controller (7), source switch (10) also connect aerotron (4), the base stage connection integrated circuit controller (7) of aerotron (4) again successively.

2, according to the described vehicle anti-theft device of claim 1, it is characterized in that: an engine motor controller by aerotron (1), resistance (10), relay (14) formation is arranged between source switch (1) and the integrated circuit controller (7).