CN2254848Y - Electronic flashing device for automobile - Google Patents

Abstract

The utility model relates to an electronic flashing device for motor vehicles, which comprises a triode transistor. An emission electrode of the triode transistor is connected with a negative pole of a diode, a common end of a relay contact and a positive pole of a power supply; a collector electrode is connected with a positive pole of the diode and a negative pole of the power supply; a resistor is connected in series between a normally-closed end of the relay contact and the negative pole of the power supply; a resistor and a capacitor are connected in series between a base electrode of the triode transistor and the normally-closed end of the relay contact, wherein, a resistor is also connected in series between the connecting portion of the resistor and the capacitor, and a normally-open end of the relay contact. A lamp bulb is connected with the normally-open end of the relay contact KC through a conversion switch. The utility model has the advantages of simple structure, easy debugging, reliable performance and low cost.

Description

The automobile-use electronic flasher.

The utility model relates to a kind of automobile-use electronic flasher.

At present, the automobile-use electronic flasher can be divided into ic-type and discrete component formula two classes by its formation.The former is as the automobile-use electronic flasher of Chinese ZL93201441.0 patent disclosure, owing to adopt integrated circuit, the cost height is unsuitable for popularization.And the electronic flasher of automobile of the latter such as Chinese ZL94212931.8 patent disclosure, though adopt discrete component, because used element is more, used transistor is more than two, the cost height, and complex structure, and debugging trouble, performance is very unstable, poor reliability.On circuit, there is not the self-protection function in addition, in case user's wrong line will cause the damage of circuit,

The automobile-use electronic flasher that the purpose of this utility model is to provide a kind of and adopts discrete component, debugs easily, cost is low, simple in structure, have defencive function, dependable performance.

The utility model uses a crystal triode, its constructional feature be the emitter of this aerotron link to each other with the public common ends of the negative pole of diode, relay contact respectively the back by a splicing ear be arranged on that the positive pole of power supply joins on the self-propelled vehicle, the collecting electrode of aerotron joins with the positive pole of diode, an end of relay respectively.After linking to each other with resistance R 3, the other end of its repeat circuit is connected on the power cathode that is arranged on the self-propelled vehicle by means of a splicing ear, the other end of resistance R 3 then is connected with the normal-closed end of relay contact, an end of cond, be serially connected with resistance R 1 between the other end of cond and the base stage of aerotron, the connecting place of this resistance R 1 and cond links to each other with the Chang Kaiduan of relay contact by resistance R 2.The Chang Kaiduan of relay contact then joins by means of a splicing ear and the pole changer and the bulb that are arranged on the self-propelled vehicle.

Because the utility model is only used a crystal triode, and is simple in structure, debugging easily, productive costs is low, has the self-protection function again, can not cause the damage of circuit because of user's wrong line, stable performance, reliable.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Accompanying drawing is a circuit theory scheme drawing of the present utility model.

The utility model comprises a crystal triode V, join with the positive source that is arranged on the self-propelled vehicle after the common port of the negative pole of its emitter and diode VD, relay contact KC links together and by means of splicing ear B, an end of its collecting electrode and relay K, the positive pole of diode VD link together.Wherein be in series with resistance R 3 between the normal-closed end of the other end of relay K and relay contact KC, and the junction of relay K and R3 is connected on the negative pole that is arranged at the power supply on the self-propelled vehicle by splicing ear.Be serially connected with resistance R 1 and cond C between the normal-closed end of the base stage of crystal triode V and relay contact KC successively, wherein be serially connected with resistance R 2 between the Chang Kaiduan of the junction of resistance R 1 and cond C and relay contact KC.The Chang Kaiduan of relay contact KC then is connected with bulb L1 or L2 with pole changer SW on being arranged on self-propelled vehicle by means of splicing ear L.

When motor turning, pole changer SW is connected bulb L1 or L2, splicing ear L is pulled to active potential by force, and the common point voltage of resistance R 1, R2 and capacitor C descends, and aerotron V obtains bias current, and its collector voltage rises.When rising to the pick-up voltage of relay K, the relay K action, its contact KC changes.Because the voltage on the capacitor C can not suddenly change, the bias current of aerotron V is further increased on the one hand, thereby form positive feed back, the further play of voltage that is added on the relay K is raised to power line voltage, has guaranteed the reliable adhesive of relay K; On the other hand, the conversion of relay contact KC is connected splicing ear L and splicing ear B, and bulb L1 or L2 are luminous.Simultaneously, the positive voltage of power supply is by e-b knot and the resistance R 1 of aerotron V, and 2 minutes two road direction conies of resistance R C charging, transistor collector voltage begins to descend afterwards, when dropping to the release voltage of relay K, relay K discharges, and its contact KC changes once more.By cond C the point of connection voltage of resistance R 1, R2 and cond C is further risen on the one hand, form positive feed back, aerotron V is ended rapidly, its collector voltage sharp fall is to zero, to guarantee the reliable release of relay K; On the other hand, cut off being connected of splicing ear L and B, bulb L1 (or L2) extinguished.Simultaneously, cond C is by resistance R 2 and R3 discharge, and the point of connection voltage of resistance R 1, R2 and cond C descends, transistor collector voltage is started from scratch again gradually and to be risen afterwards, when rising to the pick-up voltage of relay K, relay K is adhesive once more, finishes one and vibrates the same period.Adhesive, release that relay K is gone round and begun again are to realize the luminous of bulb L1 (or L2) and to extinguish.

Claims (1)

1. The automobile-use electronic flasher, comprise crystal triode (V), the common port that it is characterized in that negative pole, the relay contact (KC) of the Launch Right of this aerotron and diode (VD) back that links to each other joins by splicing ear (B) and the positive source that is arranged on the self-propelled vehicle, and its collecting electrode links to each other with an end of relay (K), the positive pole of diode (VD); After linking to each other with resistance (R3), the other end of its repeat circuit (K) is connected on the power cathode that is arranged on the self-propelled vehicle by means of splicing ear (E); The other end of resistance (R3) then is connected with the normal-closed end of relay contact (KC), an end of cond (C); Be in series with resistance (R1) between the base stage of the other end of cond (C) and aerotron (V), the junction of resistance wherein (R1) and cond (C) links to each other by the Chang Kaiduan of resistance (R2) with relay contact (KC); The Chang Kaiduan of relay contact (KC) joins by means of splicing ear (L) and the pole changer (SW) and the bulb (L1 or L2) that are arranged on the self-propelled vehicle again.

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