CN2322829Y

CN2322829Y - Circuit protector for car

Info

Publication number: CN2322829Y
Application number: CN 98200205
Authority: CN
Inventors: 林道龙
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-01-05
Filing date: 1998-01-05
Publication date: 1999-06-09
Anticipated expiration: 2008-01-05

Abstract

The utility model discloses a circuit protector for a car, which is used for the overcurrent protection of the circuit and monitoring and sending alarm by a lamp. The utility model is connected between the storage battery and the electricity using circuit of the car, and is composed of an electronic overcurrent protector and a lamp monitoring alarming device. The input end of the electronic overcurrent protector is connected with the storage battery of the car, and the output end is connected with the electricity using circuit; the input end of the lamp monitoring alarming device is connected with the output end of the electronic overcurrent protector; the output end of the lamp monitoring alarming device is connected with the lamp. When the phenomenon of short circuit occurs, a feed circuit can be cut in time, and audible-visual alarm is sent out; when a tail lamp and a direction lamp are blown out, the audible-visual alarm can also be immediately sent out. Personal safety is ensured; the occurrence of the damage of the car, personal casualty, and traffic accidents are avoided; traffic transportation is more safe.

Description

The automobile circuit protector

The utility model relates to a kind of overcurrent protective device of circuit, is meant a kind of circuit overcurrent protection of automobile and automobile circuit protector of car light monitor alarm of being used for especially.

Electric wire on the automobile or electrical equipment because of reasons such as long-term vibration and friction may form short circuit, and cause that automobile is on fire so that burn whole automobile, and the harm personal safety causes any property loss.

In addition, car light, particularly taillight and indicator, can be because of filament blow etc. former thereby cause and extinguish, at this moment, if desire was stopped or desire turning deceleration during automobile was in and travels, the vehicle that will cause the back cruising does not have signal prompt may hit the automobile that slows down previously, and causes vehicle damage, personal casualty and traffic accident to take place.

In order to reduce and even eradicate the generation of above-mentioned accident, make communications and transportation safer, the purpose of this utility model just is to provide a kind of automobile circuit protector, when short circuit phenomenon takes place, can in time cut off feed circuit, and send sound and light alarm.

Another purpose of the present utility model provides a kind of automobile circuit protector, when taillight and indicator extinguish, sends sound and light alarm immediately.

The purpose of this utility model is achieved through the following technical solutions: a kind of automobile circuit protector; be connected between automotive battery and the power circuit; form by electronic overcurrent protection device and car light monitoring alarmer; the input end of electronic overcurrent protection device is connected with automotive battery; mouth is connected with power circuit; the input end of described car light monitoring alarmer links to each other with the mouth of electronic overcurrent protection device, and the mouth of car light monitoring alarmer links to each other with car light.

Described electronic overcurrent protection device is by a positive-negative-positive crystal triode forming circuit, its emitter-base bandgap grading is connected with the positive pole of automotive battery by a resistance, base stage also is connected to the positive pole of automotive battery by one group of normally closed contact of a little resistance resistance and a switch relay, collecting electrode is connected to the negative pole of automotive battery by the control coil of described switch relay, the negative pole and the ground wire of automotive battery are connected together, be connected a light-emitting diode between one normal opened contact of described switch relay and the ground wire, be connected a buzzer phone between another normal opened contact of switch relay and the ground wire; Described car light monitoring alarmer is also by a positive-negative-positive crystal triode forming circuit, its emitter-base bandgap grading links to each other by another normally closed contact of little resistance resistance and above-mentioned switch relay, base stage also links to each other with this normally closed contact of switch relay by a resistance, car light is attempted by between the emitter-base bandgap grading and collecting electrode of this crystal triode, is connected with a light-emitting diode and a buzzer phone between the collecting electrode of described crystal triode and the ground wire.

The little resistance resistance two ends of described electronic overcurrent protection device and described car light monitoring alarmer all also can a rectifier diode in parallel.

Described automobile circuit protector can be made up of two electronic overcurrent protection devices, car light monitoring alarmer more than two; the shared buzzer phone of wherein said two electronic overcurrent protection devices; the shared another buzzer phone of described car light monitoring alarmer more than two; the output of one of electronic overcurrent protection device connects the input of the car light monitoring alarmer more than two; the output of car light monitoring alarmer connects the car light more than two respectively, and the output of another electronic overcurrent protection device connects other power circuit.

Described automobile circuit protector also is made up of four electronic overcurrent protection devices, eight car light monitoring alarmers; the shared buzzer phone of wherein said four electronic overcurrent protection devices; the shared another buzzer phone of described eight car light monitoring alarmers; the output of one of electronic overcurrent protection device connects the input of eight car light monitoring alarmers; the output of car light monitoring alarmer connects eight car lights respectively; the output of other two electronic overcurrent protection devices connects air-conditioning, rain brush power circuit respectively, and the output of remaining electronic overcurrent protection device connects other power circuit.

This shows; principal feature of the present utility model is to utilize the resistance of cheap utmost point low resistance to remove to control the switch circuit of being made up of crystal triode as the inspection fluid element; to reach when automobile circuit during because of certain reason short circuit; cut off feed circuit rapidly, thus the safety of protection automobile circuit and automobile.Same, the resistance that utilizes cheap utmost point low resistance is as the inspection fluid element, when car light extinguishes suddenly for a certain reason, can carry out sound and light alarm in time, remind driver's on-call maintenance to avoid taking place bigger danger, realize therefrom guaranteeing personal safety, avoid the generation of vehicle damage, personal casualty and traffic accident, make communications and transportation safer.

Simultaneously; the utility model cost is lower; can flexible Application; both can form by two electronic overcurrent protection devices and several car light monitoring alarmers; respectively several car lights are carried out monitor alarm by several car light monitoring alarmers; one of them electronic overcurrent protection device is finished overcurrent protection to the car light circuit; another electronic overcurrent protection device is finished the overcurrent protection to other power circuit; can form by four electronic overcurrent protection devices and several car light monitoring alarmers again, the automobile electrical circuit is protected respectively.

Below in conjunction with drawings and the specific embodiments the utility model is further described in detail again.

Fig. 1 is a circuit block diagram of the present utility model;

Fig. 2 is schematic circuit diagram of the present utility model;

Fig. 3 is the circuit block diagram of the utility model one embodiment;

Fig. 4 is the schematic circuit diagram of the utility model one embodiment;

Fig. 5 is the circuit block diagram of another embodiment of the utility model.

See also Fig. 1 and Fig. 2, circuit block diagram of the present utility model and schematic diagram.The principal feature of circuit is to utilize the resistance of cheap utmost point low resistance to remove to control the switch circuit of being made up of crystal triode as the inspection fluid element; to reach when automobile circuit during because of certain reason short circuit; cut off feed circuit rapidly, thus the safety of protection automobile circuit and automobile.

Ask for an interview the schematic circuit diagram of the electronic overcurrent protection device among Fig. 2, be made up of crystal triode BG1, switch relay J, little resistance resistance R 4 etc., its principle of work is as follows:

Just often, crystal triode BG1 is in off condition, by normally closed contact group j01-j11, the j02-j12 of 12V (or 24V) storage battery Ec by relay J to the car light of automobile etc. with electric device and security appliance power supply.At this moment, light-emitting diode D2 and buzzer phone H1 all can luminous, sounding, the electric current of R4 is a normal value owing to flow through, below 6A, add the not enough 0.7V of pressure drop on the R2 in the pressure drop on the R4, thereby aerotron BG1 can not conducting, essentially no electric current passes through in the relay J coil, so relay J is failure to actuate, make circuit keep supply regular power.

During short circuit, because the electric current of flowing through on the R4 is very big, such as greater than 7A, and R4=0.1 Ω, then the pressure drop U on the small resistor R4 here _R4〉=0.7V adds the little by little dividing potential drop on the R2, at this moment the voltage U be=U between crystal triode BG1 emitter and the base stage _R4+ U _R2Absolute value just can be slightly larger than 0.7V, thereby aerotron BG1 will be rapidly by saturated by being converted into, relay J will obtain the high potential of nearly 12V and inhale, make contact group j01, j02 turn to normal opened contact group j21, j22 by original normally off, its consequence will be the outside power supply that (1) cuts off storage battery Ec, protect the safety of battery and electric equipment; (2) resistance R 2 is thrown off positive source, and the base potential of aerotron BG1 changes by the pressure drop on the resistance R 1 to be kept, and makes BG1 still keep saturated, and relay J is still kept adhesive; (3) because the j21-j01 junction closure makes the luminous warning of light-emitting diode D2; (4) because the j22-j02 junction closure makes buzzer phone H1 energized and sounding alarm.As from the foregoing, the scope of overcurrent protection is determined that by the numerical values recited of little resistance resistance R 4 if change resistance R 4 into 0.05 Ω, then overcurrent protection value can reach more than the 14A.In addition, if the untimely trouble-shooting of driver's this moment, then feed circuit will be in off-state forever.

Ask for an interview the schematic circuit diagram of the car light monitoring alarmer among Fig. 2, be made up of crystal triode BG2, resistance R 5, little resistance resistance R 7 etc., its principle of work is as follows:

Just often, crystal triode BG2 also is in off condition, that is does not report to the police under the situation that car light is normally lighted.Ube=U herein _R7-U _R5If the electric current I=1.5A when car light is bright is and if the dividing potential drop on the R5 is adjusted into U earlier _R5=0.75V, little resistance resistance R 7=0.4 Ω, Ci Shi Ube=1.5 * 0.4-0.75=-0.15V then, so deficiency-0.7V is aerotron BG2 remain off.

When for a certain reason, car light extinguishes suddenly, and the electric current that flows through R7 and car light L this moment just is zero immediately, thereby the pressure drop U on the R7 _R7=0, make Ube=0-0.75V=-0.75V, satisfied the saturation conduction condition of aerotron BG2, make BG2 saturated immediately, collector voltage Uc rises to about 11.5V immediately, and this moment, light-emitting diode D4 was shinny, buzzer phone H2 sounding, that is send filament blow or the disconnected alerting signal of shaking, and remind the driver in time to repair car light, to avoid other accident.

Sometimes in order to make automobile circuit protector itself safer, can be on R4 and R7 by direction of current respectively and meet rectifier diode D5, a D6, with convenient electric current when too big, that is the pressure drop on R4 and the R7 greater than 0.7V more for a long time, make its part electric current by passing through on the rectifier diode.

Fig. 3, Fig. 4 are circuit block diagram and the schematic diagram of the utility model one embodiment; form by two electronic overcurrent protection devices, eight car light monitoring alarmers; the output of one of two electronic overcurrent protection devices links to each other with the input of eight car light monitoring alarmers; car light is carried out overcurrent protection; eight car light monitoring alarmers monitor eight car lights respectively; and having eight light-emitting diodes to finish the light warning of eight car lights respectively, a shared buzzer phone is finished audible alarm.The output of another of two electronic overcurrent protection devices is connected to other input end with electric device and electrical equipment, finishes other overcurrent protection with electric device and electrical equipment.

Fig. 5 is the circuit block diagram of another embodiment of the utility model; form by four electronic overcurrent protection devices, eight car light monitoring alarmers; the output of one of four electronic overcurrent protection devices links to each other with the input of eight car light monitoring alarmers; car light is carried out overcurrent protection; eight car light monitoring alarmers monitor eight car lights respectively; and having eight light-emitting diodes to finish the light warning of eight car lights respectively, a shared buzzer phone is finished audible alarm.The output of two other of four electronic overcurrent protection devices links to each other with the input of air conditioning electricity circuit, rain brush power circuit respectively; all the other electronic overcurrent protection devices are connected with the input of other power circuit, finish the overcurrent protection to air-conditioning, rain brush and other power circuit respectively.

Claims

1, a kind of automobile circuit protector; be connected between automotive battery and the power circuit; it is characterized in that: described automobile circuit protector is made up of electronic overcurrent protection device and car light monitoring alarmer; the input end of electronic overcurrent protection device is connected with automotive battery; mouth is connected with power circuit; the input end of described car light monitoring alarmer links to each other with the mouth of electronic overcurrent protection device, and the mouth of car light monitoring alarmer links to each other with car light.

2, automobile circuit protector according to claim 1, it is characterized in that: described electronic overcurrent protection device is by a positive-negative-positive crystal triode forming circuit, its emitter-base bandgap grading is connected with the positive pole of automotive battery by a resistance, base stage also is connected to the positive pole of automotive battery by one group of normally closed contact of a little resistance resistance and a switch relay, collecting electrode is connected to the negative pole of automotive battery by the control coil of described switch relay, the negative pole and the ground wire of automotive battery are connected together, be connected a light-emitting diode between one normal opened contact of described switch relay and the ground wire, be connected a buzzer phone between another normal opened contact of switch relay and the ground wire; Described car light monitoring alarmer is also by a positive-negative-positive crystal triode forming circuit, its emitter-base bandgap grading links to each other by another normally closed contact of little resistance resistance and above-mentioned switch relay, base stage also links to each other with this normally closed contact of switch relay by a resistance, car light is attempted by between the emitter-base bandgap grading and collecting electrode of this crystal triode, is connected with a light-emitting diode and a buzzer phone between the collecting electrode of described crystal triode and the ground wire.

3, automobile circuit protector according to claim 2 is characterized in that: the little resistance resistance two ends of described electronic overcurrent protection device and described car light monitoring alarmer all also can a rectifier diode in parallel.

4; according to the described automobile circuit protector of claim 1 to 3; it is characterized in that: described automobile circuit protector is by two electronic overcurrent protection devices; car light monitoring alarmer more than two is formed; the shared buzzer phone of wherein said two electronic overcurrent protection devices; the shared another buzzer phone of described car light monitoring alarmer more than two; the output of one of electronic overcurrent protection device connects the input of the car light monitoring alarmer more than two; the output of car light monitoring alarmer connects the car light more than two respectively, and the output of another electronic overcurrent protection device connects other power circuit.

5; according to the described automobile circuit protector of claim 1 to 3; it is characterized in that: described automobile circuit protector is by four electronic overcurrent protection devices; eight car light monitoring alarmers are formed; the shared buzzer phone of wherein said four electronic overcurrent protection devices; the shared another buzzer phone of described eight car light monitoring alarmers; the output of one of electronic overcurrent protection device connects the input of eight car light monitoring alarmers; the output of car light monitoring alarmer connects eight car lights respectively; the output of other two electronic overcurrent protection devices connects air-conditioning respectively; the rain brush power circuit, the output of remaining electronic overcurrent protection device connects other power circuit.