CN2421721Y

CN2421721Y - Low-speed automatic luminance increasing device for motorcycle

Info

Publication number: CN2421721Y
Application number: CN 99251542
Authority: CN
Inventors: 李俊康
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-10-26
Filing date: 1999-10-26
Publication date: 2001-02-28
Anticipated expiration: 2009-10-26

Abstract

The utility model relates to an automatic luminance increasing device which can ensure the illuminating brightness when a motorcycle is in slow running. The circuit structure of the utility model comprises a rectification circuit, a voltage detecting circuit, a current amplification part and a power supply change over part. When the voltage output by a magneto does not achieve the rated voltage of the illuminating lamp, a battery on the motorcycle is used to supply the power to the illuminating lamp. When the voltage output by the magneto achieves the rated voltage of the illuminating lamp, the alternating current is used to supply the power to the illuminating lamp. In this way, the illuminating lamp always can work under the condition of rated voltage. The utility model has the advantages of simple structure, stable performance, and low cost.

Description

The automatic brightness-increasing device of motorcycle low speed

The utility model relates to a kind of motorcycle lighting device, particularly relates to a kind of brightness-increasing device of motorcycle lighting device.

The brightness of general motorcycle lighting lamp is supplied with by generator on the car, and generator is driven by engine, the voltage of generator is that the rotating speed by engine decides, engine is per minute 1500 right sides of turning left only when low-speed running, and when running up, change up to 8000, both differ 5 times more than.The illuminating lamp of domestic a lot of vehicles is when using the 6V alternating current, and car low-speed running generator is exported to the voltage ability 2.5V of illuminating lamp, only is half of 6V illuminating lamp rated voltage.The part vehicle of using the 12V illuminating lamp in addition is when the vehicle low-speed running, the voltage that generator outputs to illuminating lamp also has only 6V-7V, the rated voltage that needs with illuminating lamp competitively poor half, so driving car, most of drivers feel all that when low cruise lighting brightness is not enough, at this moment as at meeting, turning or when complex road surface travels, owing to do not see the place ahead road conditions, be easy to take place traffic accident, and in the market still without any the device that can effectively address this problem.

The purpose of this utility model is to provide a kind of like this device, and it can guarantee that the motorcycle lighting lamp works all the time under rated voltage, the driver can both be travelled under specified brightness, and simple in structure, and cost is low, is easy to promote the use of.

Technical solution of the present utility model is: its circuit structure includes rectification circuit, voltage detecting circuit, electric current amplifier section and power source conversion part, its feature is: by the single-phase alternating current of generator output behind bridge rectifier and filter capacitor C1, one the tunnel directly imports the relay J 2 in the power source conversion part, another road is imported in the voltage detecting circuit that is made of resistance R 1, R2, R3 and voltage-stabiliser tube DW, again after triode T amplifies, flow into the relay J 1 in the power source conversion part, the fixed contact of J1 connects illuminating lamp on the car.

When the voltage by generator output does not reach the rated voltage of lighting bulb, the illumination bulb is by storage battery power supply on the car, when the voltage of generator output reaches the illuminating lamp rated voltage, illuminating lamp is supplied with by alternating current, lighting bulb is worked under the rated voltage situation all the time like this, has guaranteed that the driver travels under specified brightness.

Below in conjunction with accompanying drawing the utility model embodiment is described.

Fig. 1 is the utility model external form figure;

Fig. 2 is the utility model circuit theory diagrams.

Among Fig. 2, by the single-phase alternating current of generator on the motorcycle 1 output via diode bridge rectification and filter capacitor C1 after, one the tunnel directly imports relay J 2 coils in the power source conversion part, another road is imported in the voltage detecting circuit that is made of resistance R 1, R2, R3 and voltage-stabiliser tube DW, again after triode T amplifies, flow into the relay J 1 in the power source conversion part, the fixed contact of J1 connects illuminating lamp 2 on the car.

Its operation principle is:

When switch is opened in the need illumination, the alternating current that is sent by magneto on the car 1 is through switch, after the diode bridge rectification, divide two-way output, positive supply flows through the J2 coil, form a loop, make the adhesive of J2 normally opened contact, connect automobile-used storage battery 3 positive supplies for the normally closed point of J1, for J1 migrates when vehicle low speed alternating current output voltage is not enough, another road is via R1, R2, flow into the amplifying circuit of being made up of triode T behind the voltage detecting circuit that R3 and voltage-stabiliser tube DW form, wherein DW has the effect of reverse breakdown, when DW selects for use required voltage to be added in two ends, DW is just open-minded, or closes.As set the 6V illuminator, in the output of magneto 1 alternating current 6V is arranged, the DW voltage-stabiliser tube is during with regard to reverse breakdown, and electric current flows to DW, R1 and R2 from positive pole by R3, forms the loop, the base stage of triode has had bias current, pipe begins conducting, and electric current makes the normally opened contact adhesive of relay J 2 from the V+ triode of flowing through, the normally-closed contact of former use storage battery 3 electric lightings is disconnected, use the alternating current that meets the lighting voltage index instead.When magneto 1 output voltage is lower than 6V, not conducting of DW, R3 does not have the electric current process, the T pipe does not have bias voltage, and T manages not conducting, and J2 does not have the electric current process, normally opened contact discharges and recovers normally off, use storage battery 3 power supplys to supply with illuminator again, fail the power supply that does not reach the illumination rated voltage, supply with illuminating lamp 2 by the storage battery 3 of rated voltage thereby cut off magneto 1.Also can brighten when so not only making the vehicle low cruise, reach enhanced shine, also realize automatic control function from half-light.

Claims

1. automatic brightness-increasing device of motorcycle low speed, comprise rectification circuit, voltage detecting circuit, electric current amplifier section, power source conversion part and switch, it is characterized in that: by the single-phase alternating current of magneto (1) output after bridge rectifier and filtering, one the tunnel directly imports the relay J 2 in the power source conversion part, another road is imported in the voltage detecting circuit that is made of resistance R 1, R2, R3 and voltage-stabiliser tube DW, again after triode T amplifies, flow into the relay J 1 in the power source conversion part, the fixed contact of J1 connects illuminating lamp on the car (2).