CN2144599Y

CN2144599Y - Break lamp switch for car

Info

Publication number: CN2144599Y
Application number: CN 92230269
Authority: CN
Inventors: 范芳华
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-08-15
Filing date: 1992-08-15
Publication date: 1993-10-27
Anticipated expiration: 2002-08-15

Abstract

The utility model relates to a break lamp switch for a car, which comprises an outer shell, the switching circuit 1 of the outer shell, a detection circuit 2 and an audio circuit 3. The utility model is installed at the lower part of the instrument panel of the car, and the power supply uses the 12V power supply of the car. During the operating process, if the circuit is in short circuit or broken circuit state, the audio sound can be sent out to give an alarm. The main units of the break lamp switch adopt integrated circuits, and the electric induction is not provided; so the break lamp switch belong to the contactless switch class. The utility model has the advantages of small volume, light weight, long service life and convenient installation. The break lamp switch for a car is suitable for various cars.

Description

Break lamp switch for car

The utility model relates to a kind of switch, especially a kind of automobile brake lamp special switch.

At present general vehicle brake-light switch function singleness only plays on-off action, when the brake signal et out of order, can not report to the police, and therefore causes traffic accident.

The purpose of this utility model is in order to provide a kind of when the brake signal et out of order, can to send the braking signal switch of alerting signal, the traffic accident that takes place to prevent therefore.

The utility model is made up of shell and switch circuit 1, testing circuit 2 and acoustics circuit 3, its architectural feature is 5 pin of the ic chip 1 in the switch circuit 1 and a client link of the resistance R 6 in the testing circuit 2, and the emitter of the aerotron BG2 in the testing circuit 2 and the buzzer phone in the acoustics circuit 3 connect.

Below in conjunction with accompanying drawing architectural feature of the present utility model is further specified:

Fig. 1 is the circuit block diagram in the utility model.Wherein switch circuit 1 is made up of ic chip 1, K switch and resistance R 1, testing circuit 2 is by ic chip 2, resistance R 2-7, potential device W, diode D, aerotron BG1,2, cond C and indicator lamp ZD1, ZD2 form, acoustics circuit 3 is made up of buzzer phone FM, indicator lamp ZD1, ZD2 and loudspeaker, more than each circuit be known circuit.

Fig. 2 is an electrical block diagram of the present utility model.

This switch is installed in the automobile instrument panel below, its power supply uses automobile 12V power supply, if in operational process during short circuit, (A) point among Fig. 2 is active potential (because of bonding), indicator lamp ZD1 Chang Ming, be expressed as short trouble, the aerotron BG1 in the testing circuit 2 ends because of no-bias simultaneously, and aerotron BG2 conducting is also reported to the police.Testing circuit 2 can be told at work because of lacking the trace variation that lamp causes (A) point voltage among Fig. 2, shows with digital form " 1 " (expression high potential) or " 0 " (active potential) at mouth.In addition, utilize the internal resistance of ic chip 1 because of this circuit, so it is not full-time at light, (A) point voltage among Fig. 2 will slightly rise, testing circuit is just exported high level, makes aerotron BG2 get bias voltage and conducting, and audible alarm circuit 3 is reported to the police, indicator lamp ZD2 is luminous simultaneously, and the expression vehicle signal is incomplete.In operational process, when if automobile signal light does not all work, then (A) point voltage among Fig. 2 raises, be raised to identically with power line voltage 12V, indicator lamp ED1 extinguishes always, testing circuit 2 output high potentials, audible alarm circuit 3 is reported to the police, indicator lamp ZD2 is bright, the expression open circuit light completely without, sound equipment and the relation between the fault that this switch sent are as follows:

1, no sound equipment: indicator lamp ZD1 does not work, and indicator lamp ZD2 does not work, and expression is normal.

2, sound equipment is arranged: indicator lamp ZD1 does not work, and indicator lamp ZD2 is bright, the few lamp of expression.

3, sound equipment is arranged: indicator lamp ZD1 is bright, and indicator lamp ZD2 does not work, the expression short circuit.

4, sound equipment is arranged: indicator lamp ZD1 does not work, and indicator lamp ZD2 is bright, and expression is opened circuit.

The major part of this switch has adopted integrated circuit, does not have electric induction, belongs to the noncontacting switch class, does not have spark to burn out the fraud of contact, and its volume is little, and is in light weight, easy for installation, long service life, and various automobiles can use.

Claims

A kind of vehicle brake-light switch, form by shell and switch circuit, testing circuit and acoustics circuit, it is characterized in that 5 pin of the ic chip 2 in the switch circuit and a client link of the resistance R 8 in the testing circuit, the emitter of the aerotron BG2 in the testing circuit and the buzzer phone in the acoustics circuit connect.