CN2134944Y - Multi-functional flashing lamp of vehicle - Google Patents

Abstract

The utility model relates to a multi-functional flashing lamp of a vehicle. A VMOS power field effect transistor is adopted to be used as the flicker of an electronic switching control turn light, the conduction and the stop of the power field effect transistor are controlled by a square wave oscillator which is composed of integrated inverters, and an alarm circuit is provided and is composed of inverters; so multi-functional flashing lamp of a vehicle can do alarm for various abnormal states. The utility model is provided with a short circuit automatic protection circuit, a lamp fault detection circuit and a fault wire-connection protection circuit. The utility model conquers the disadvantages of the short life time and the few functions of the present flasher.

Description

Multi-functional flashing lamp of vehicle

The utility model relates to automobile flasher, particularly a kind of multi-purpose vehicle(MPV) Der Blink und Abblendschalter with automatic protection functions.

Various automobile flashers are arranged; but generally can be divided into mechanical contact-type and the two big classes electronic contact formula; the existing automobile flasher ubiquity flash of light shortcoming that the life-span is short, function is few; Chinese patent CN2098412 discloses a kind of " contactless electron flash of light news Chinese percussion instrument ", and this news Chinese percussion instrument is made noncontacting switch with power transistor; make the flash of light life-span longer than the news Chinese percussion instrument of mechanical contact-type; but there is not automatic protection functions; in case load short circuits just is easy to power transistor is burnt out, so the Der Blink und Abblendschalter life-time dilatation does not obtain certain assurance.This news Chinese percussion instrument can be pointed out mode of operation, but can not point out load faulty, for example, if certain steering indicating light damages, as not giving the prompting of being out of order, just may cause traffic accident, and the deficiency of this news Chinese percussion instrument is conspicuous.

The purpose of this utility model is in order to overcome the deficiency of above-mentioned automobile flasher; a kind of multi-purpose vehicle(MPV) Der Blink und Abblendschalter is provided for this reason; the utility model still adopts contactless electron flash of light mode; can point out mode of operation; but multiple automatic protection functions and multiple warning function have been increased; when strange phenomenies such as load is short-circuited, overcurrent, wiring error and steering indicating light damage; Der Blink und Abblendschalter can be protected own automatically and not be damaged; make the life-span of Der Blink und Abblendschalter obtain certain prolongation; can send simultaneously the audio alarm sound of distinguishing different faults, safe and convenient to use.

Automobile flasher of the present utility model comprises flashing signal generation circuit, audio alarm circuit, lamp fault detection circuit, short circuit automatic protection circuit and false wiring protective circuit.Below referring to accompanying drawing the utility model is explained in detail.

Fig. 1 is the schematic circuit diagram of multi-purpose vehicle(MPV) Der Blink und Abblendschalter of the present utility model.

Now referring to Fig. 1, flashing signal generation circuit is by wherein two phase inverter F1, F2 among the hex inverter CD4069, resistance R 1 and capacitor C 2 are formed, be that frequency is the square-wave oscillator of 1.25Hz, the square-wave signal of output drives VMOS power field effect transistor V2 by resistance R 2, makes V2 with the frequency conducting of 1.25Hz with end.When V2 ends, the steering indicating light H of string between transistor V2 leakage, source electrode extinguishes because of no current, when V2 is saturated, power supply GB adds to steering indicating light H by V2, inductance L, resistance R 5 through pole changer S2 lights H, be steering indicating light H along with the conducting of V2 and by and light on and off, this just becomes automobile flasher.Diode V1 and capacitor C 1 are in order hex inverter CD4069 to be still had keep the voltage of its work, and this holding time of voltage is greater than the V2 saturation time.Between the off period, power supply GB charges to C1 by V1 at V2, the voltage on the C1 as next cycle V2 when saturated hex inverter CD4069 keep operating voltage.

The audio alarm circuit is made up of two other phase inverter F3, F4 among the hex inverter CD4069 and resistance R 3, capacitor C 3, be that frequency is the square-wave oscillator of 2KHz, for increasing its fan-out capability, with two phase inverter F5, F6 and F4 of CD4069 remainder and connect, its output drives loud speaker y sounding through blocking condenser C4.

The lamp fault detection circuit is made up of inductance L and dry reed switch pipe S1, inductance L is the coil of row on the dry reed switch pipe S1, because of L connects with steering indicating light H, so make the S1 adhesive when suitably selecting the number of turn of L can make steering indicating light H trouble free and V2 saturated, the audio alarm circuit is connected to F3 input end failure of oscillation because of switching valve S1 with active potential, and steering indicating light extinguished when V2 ended, and S1 discharges disconnection, audio alarm circuit sounding forms the periodic duty sound equipment.In case steering indicating light damages, the undercurrent that flows through coil L is so that dry reed switch pipe S1 adhesive, the audio alarm circuit produces pedal point, but because of the operating voltage of integrated circuit CD4069 is kept by C1 when V2 is saturated, and the voltage of C1 is in decay, form the continuous decrement sound thus, this sound promptly can be used as the alarm of lamp et out of order.

The short circuit automatic protection circuit is made up of crystal triode V3 and resistance R 4, R5, and under Der Blink und Abblendschalter load normal circumstances, the pressure drop on the resistance R 4 is less than the base-on voltage of transistor V3, and V3 does not work.When load short circuits; flow through the maximum operating currenbt of the electric current of R4 less than V2; but the pressure drop that forms is greater than 0.7 volt; V3 obtains bias voltage and is saturated; with the current collection of phase inverter F1 input end bonded assembly V3 active potential very; thereby the low frequency oscillator failure of oscillation that F1, F2 are formed, the active potential of F2 mouth ends VMOS power tube V2, thereby has protected V2.Meanwhile, V2 is by making CD4069 obtain a constant potential, and the audio alarm circuit produces the pedal point prompting.

The false wiring protective circuit is formed by VMOS power tube in-to-in protection diode, when Der Blink und Abblendschalter connects power supply GB and is connected two wiring error reversal connections (exchanging) of pole changer S2; V2 in-to-in diode current flow, V2 leak, the source both end voltage only is about 0.7 volt, and whole flasher circuit is protected, the bright and flicker free of steering indicating light at this moment, alarm free sound equipment, this condition prompting wiring error.

In sum, automobile flasher of the present utility model has multiple automatic protection functions, makes the life-span of Der Blink und Abblendschalter obtain certain prolongation, except that the prompting mode of operation, can also point out various faulty conditions, uses safer and convenience.

Claims (1)

1, a kind of multi-purpose vehicle(MPV) Der Blink und Abblendschalter, comprise flashing signal generation circuit, audio alarm circuit, lamp fault detection circuit, short circuit automatic protection circuit and false wiring protective circuit, it is characterized in that described flashing signal generation circuit is made up of two phase inverter F1, F2 and resistance R 1, capacitor C 2, the square-wave signal that produces makes power field effect transistor V2 alternate conduction and ends, and the steering indicating light H of string between V2 leakage, source electrode also alternately lights and extinguish; Described audio alarm circuit is made up of phase inverter F3, F4 and resistance R 3, capacitor C 3, and its input is connected to the source electrode of V2 via the lamp fault detection circuit of inductance L and dry reed switch pipe S1 composition, and output drives loud speaker Y sounding through blocking condenser C4; Described short circuit automatic protection circuit is made up of aerotron V3 and resistance R 4, R5, and the collecting electrode of V3 is connected to the input end of described phase inverter F1, the collecting electrode of resistance R 5 one termination V3, and the other end links to each other with the V3 base stage by resistance R 4.

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