CN2206229Y

CN2206229Y - Two-wire system full electronic contactless blinker for car

Info

Publication number: CN2206229Y
Application number: CN 94244521
Authority: CN
Inventors: 岳钟琰
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-11-10
Filing date: 1994-11-10
Publication date: 1995-08-30
Anticipated expiration: 2004-11-10

Abstract

The utility model relates to a two-wire system full electronic contactless flash apparatus for motorcars, which is the improvement of a semielectronic flash apparatus. The flash apparatus adopts a high power field effect tube as a switch tube, a power supply of the flash apparatus is provided with a bootstrap power supply circuit, only a positive power cord and a lamp wire are needed, and the flash apparatus is also provided with a current foldback circuit and a low current alarm circuit. The flash apparatus has the advantages of reliable performance, high load capacity, long service life and convenient installation and maintenance.

Description

Two-wire system full electronic contactless blinker for car

The utility model relates to a kind of two-wire system all-electronin contactless automobile Der Blink und Abblendschalter, belongs to Vehicular turn optical signalling control circuit technical field.

At present, the automobile flasher of use belongs to half-electron half mechanical product, and performance is unreliable, work life is short, and traditional electronic switching circuit is because hear rate is bigger, and load-carrying capacity is not high, can only adopt dynamo-electric combination to satisfy the Der Blink und Abblendschalter in-use performance.The domestic report of not seeing the success of all-electronin Der Blink und Abblendschalter so far is not even also use the all-electronin contactless flasher as yet on imported auto.

The purpose of this utility model is the all-electronin contactless automobile Der Blink und Abblendschalter that discloses a kind of dependable performance, long service life, is the improvement and the raising of double electronic type automobile flasher.

Task of the present utility model is to realize like this, described all-electronin contactless automobile Der Blink und Abblendschalter mainly comprises oscillating circuit and switch circuit, form square-wave pulse generator by two not circuits and the electric capacity and the feedback resistance that are serially connected in therebetween, provide control signal to switch circuit, with the switching valve of high-power FET as switch circuit, this Der Blink und Abblendschalter is provided with a bootstrap power supply circuit, form between the source electrode and drain electrode that is added in switching valve by diode and capacitance series, positive source is connected with drain electrode, and the flash of light load is located between this switch source and automobile grounding jumper.

This Der Blink und Abblendschalter also is provided with current foldback circuit and little electric current warning circuit.The former is the input end that the voltage signal of described switch source and drain electrode is added to an amplifier respectively, its output is the level logic circuit input end after two serial connection not gates add to described oscillator, this amplifier output high level forces the oscillator output low level, the off switch pipe when overcurrent takes place; The latter adds to another transport and placing device with described switching valve source electrode and drain voltage signal, its output directly adds to the preceding level logic circuit of oscillator, this decision circuit adopts NAND gate, when switching valve flows through little electric current, this amplifier output low level, thereby control oscillation frequency and dutycycle make switching valve open dutycycle and diminish.

The utility model dependable performance, bearing power is big, life-span is long, and continuous working can reach several ten thousand hours, and can make compound annunciator and use, owing to adopt all electronic circuit, it is hermetically sealed that product can be implemented the freezing plastic can, and waterproof, vibrationproof performance are splendid, only needs positive power line and lamp line after particularly adopting bootstrap power supply, save negative power line, thus saving in material and being easy for installation and maintenance.And existing electronic flasher is three wire system.

With regard to drawings and Examples the utility model is specified below:

Fig. 1 is a two-wire system all-electronin Der Blink und Abblendschalter logical diagram.

Fig. 2 is schematic circuit diagram.

Oscillator 1 and switch circuit 2 are the Der Blink und Abblendschalter basiccircuit among Fig. 1; between switch circuit 2 and oscillator 1, also be provided with two feedback control circuits; one is current foldback circuit 3; another is the also exportable simultaneously on-off signal of little electric current warning circuit 4, switch circuit; control sounder 5 sends work or alarm sound signal.

NAND gate A1, not gate A2 and capacitor C 1, resistance R 2 constitute a square-wave oscillator among Fig. 2, A2 is to control signal of high-power N channel field-effect pipe T output, the source electrode of T pipe, drain electrode are between the bootstrap power supply, this bootstrap power supply circuit is formed by diode D2, capacitor C 2, resistance R 1 serial connection, one termination positive power line and drain electrode, another termination source electrode.Capacitor C 2 two ends and a reversal connection diode D1.Diode D2 one end is also gone here and there a reversal connection diode D3, uses during for 24V at external power.Capacitor C 2, resistance R 1 and diode D1 constitute an active filter, when Der Blink und Abblendschalter runs into the high-voltage pulse impact, the T pipe are opened, and leak the high-voltage pulse energy, the protection entire circuit.

Two feedback control circuit principles are as follows:

The drain voltage signal of T pipe adds to input end of amplifier B1, B2 respectively through R3, and the voltage signal of T pipe source electrode then adds to another input end of amplifier B1, B2 respectively through R4, R5.As crossing current control, amplifier B2 exports through two not gate A4, A3 shaping, and D4 adds to logic inverter A2 input end after isolating, and B2 output high level makes the A2 output low level during T pipe overcurrent, and the T pipe is closed.A4 is a NAND gate, and its input is connected with A2 output.As little current control, B1 output directly adds to the input end of the preceding level logic circuit A1 of oscillator, this moment, A1 was a NAND gate, pressure drop is too small when the T pipe flows through little electric current, the B1 output low level, control oscillation frequency and dutycycle are to the control signal of a little dutycycle of T pipe output, from the mal signal that the sounder (not shown) is sent, the driver can judge the silk that continues.

Der Blink und Abblendschalter adopts two-wire system, and one is positive power line V+, and another is lamp line L, and load is connected between lamp line and the bonding, saves negative power line.

Side circuit, logical component A1-A4 are one four NAND gate integrated package, and B1, B2 are an amplifier integrated package.

Claims

1, a kind of two-wire system all-electronin contactless automobile Der Blink und Abblendschalter, mainly comprise oscillating circuit and switch circuit, it is characterized in that described oscillating circuit is by two logic inverter (A1, A2) and the square-wave generator that constitutes of electric capacity (C1) resistance (R2), provide control signal to switch circuit, described switch circuit with high-power FET (T) as switching valve, this Der Blink und Abblendschalter is provided with a bootstrap power supply circuit, form by diode (D2) and electric capacity (C1) serial connection, be connected between the source electrode and drain electrode of switching valve (T), positive source is connected with drain electrode, and the flash of light load is connected between switching valve (T) source electrode and the bonding.

2, by the described two-wire system all-electronin of claim 1 contactless automobile Der Blink und Abblendschalter, it is characterized in that also being provided with a diode (D1) and resistance (R1) in the bootstrap power supply circuit of described Der Blink und Abblendschalter, diode (D1) oppositely and electric capacity (C2) and connecing, resistance (R1) is serially connected with between the source electrode of electric capacity (C2) and switching valve (T), and said elements constitutes the active filter of an anti-high-voltage pulse.

3, by claim 1 or 2 described two-wire system all-electronin contactless automobile Der Blink und Abblendschalters, it is characterized in that described Der Blink und Abblendschalter also is provided with a current foldback circuit; The input end of amplifier (B2) is obtained voltage signal from the source electrode and the drain electrode of field effect transistor (T) respectively, and its output adds to the input end of oscillating circuit not gate (A2) through not gate (A4, A3).

4, by claim 1 or 2 described two-wire system all-electronin contactless automobile Der Blink und Abblendschalters, it is characterized in that described Der Blink und Abblendschalter also is provided with a little electric current warning circuit; The input end of amplifier (B1) is obtained voltage signal from the source electrode and the drain electrode of the field effect transister (T) respectively, and its output adds to an input end of oscillator logic element (A1), and this logical component (A1) is a NAND gate.