CN2261363Y - Overload protection, electronic, electromagnetic composite steering flasher - Google Patents

Abstract

An overload protection circuit is added in the flasher of the sequential electric connection structure of an oscillating circuit and an electronic switch circuit on a circuit board in an insulating shell, one end of the protection circuit is electrically connected with the oscillating circuit, the other end of the protection circuit is electrically connected with a sampling resistor in the electronic switch circuit, when a load circuit of the flasher is short-circuited, the voltage drop of the short-circuit current on the sampling resistor enables a triode in the protection circuit to be conducted, the oscillating circuit is forced to stop vibrating, the electronic switch cuts off a grounding loop of a relay coil, a contact is released, and the short-circuit current is limited within the safety range of the contact.

Description

Overload protection, electronics, electromagnetism combined type turning flash device

The utility model relates to a kind of automobile-used overload protection, electronics, electromagnetism combined type turning flash device, especially can implement protection automatically to Der Blink und Abblendschalter when load short circuits.

At present, known auto electronic, electromagnetism combined type turning flash device are that oscillating circuit and electronic switching circuit series electrical connect on the circuit card in the plastic casing track, and connect inserted sheets and realize and being connected of external circuit by being welded on the circuit card three.When connecting pole changer, the magnet coil of electronic circuit control relay makes the contact be switched on or switched off load circuit regularly, and sends rhythmical sound.This Der Blink und Abblendschalter load-carrying capacity is strong, and lively rhythm has been that most vehicle adopts.But owing to lack overload protection function, when short circuit appearred in load circuit, short circuit current can burn sample resistance or contact in the circuit in moment, and therefore Der Blink und Abblendschalter is scrapped.

The purpose of this utility model provides a kind of electronics, electromagnetism combined type turning flash device that possesses overload protection function; it not only can provide normal flashing signal for steering indicating light; and can when load short circuits, carry out reliable protection to Der Blink und Abblendschalter, send the continuous sound that is different from just often simultaneously to show alarm.The purpose of this utility model is to realize like this; the track that two symmetries are arranged in insulated shell; the shell back is fixed with the metal erecting frame; be inserted with one in the track circuit card that electronics does not have device is installed; circuit connects inserted sheets and realizes and being connected of external circuit by being welded on the circuit card three; on the circuit card; oscillating circuit and electronic switching circuit series electrical connect; one overload protecting circuit is set; make sample resistance electrical connection in one end and the electronic switching circuit; the other end is connected with oscillating circuit, simultaneously is connected in series a current-limiting resistance at the break back contact of relay with exporting between the L, and short circuit current is limited.When Der Blink und Abblendschalter when short circuit appears in load; the loss in voltage of short circuit current on sample resistance makes the aerotron conducting in the protective circuit; force the oscillating circuit failure of oscillation; electronic switching circuit get out of hand voltage; relay contact cuts off load; at this moment; sample resistance because of no current by losing pressure drop; aerotron in the protective circuit turn-offs, and circuit recovers vibration, and the contact is connected once again; so repeatedly; because the structure of circuit makes the combined action of the time of contact tripping greater than turnon time and current-limiting resistance, short circuit current is limited in the safety zone of contact, makes Der Blink und Abblendschalter avoid damaging.In normal use at ordinary times, the surge current when current-limiting resistance has also limited the bulb cold conditions has prolonged service life of bulb.

Owing to take such scheme, outside the normal flash of light of this Der Blink und Abblendschalter decapacitation, can also when appearring in load, short circuit carry out reliable protection, and the surge current can limit the bulb cold conditions time to Der Blink und Abblendschalter, prolonged the life-span of bulb.

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

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

Fig. 2 is an outside drawing of the present utility model.

Fig. 3 is these practical schematic circuit diagram.

Among the figure 1, oscillating circuit; 2, electronic switching circuit; 3, overload protecting circuit; 4, connect inserted sheet; 5, insulated shell; 6, metal mounting bracket.

In Fig. 1, oscillating circuit (1), electronic switching circuit (2) series electrical connect, and overload protecting circuit (3) one ends are electrically connected with oscillating circuit, and an end is electrically connected with sample resistance in the electronic switching circuit.

Among Fig. 2, connecting its circuit card inner and in the insulated shell of inserted sheet (4) is electrically connected, outer end and external circuit power supply B+, D-, output L are electrically connected, insulated shell (5) is a moulding, the sliding rail power circuit board that its inside is provided with symmetry inserts, oral area has the type that the buckles into end cap that matches with the shell endoporus that enclosure and extraneous the maintenance are sealed, and mounting bracket (6) is fixed in the sliding tray of insulated shell back.

Among Fig. 3, oscillating circuit (1) is by NPN type aerotron T ₁, positive-negative-positive aerotron T ₂, T ₃, resistance R ₁, R ₂, R ₃, R ₄, R ₅, R ₆, R ₇, R ₈, R ₉, R ₁₀, capacitor C ₁, C ₂Be electrically connected and form.In circuit, T ₁Collecting electrode C, resistance R ₁, R ₂An end and power supply B+ be electrically connected T ₁Base stage b and R ₂The other end and R ₃An end be electrically connected R ₃An other end and R ₄, R ₁The other end be electrically connected R ₄The other end and R ₅D-is electrically connected with power supply, R ₅The other end and T ₁Emitter e, T ₂Base stage b be electrically connected T ₂Collecting electrode C and R ₆Be electrically connected R ₆The other end and R ₉, C ₁Negative electricity connect R ₉The other end and T ₅Collecting electrode C be electrically connected C ₁Positive pole and R ₇, R ₈Be electrically connected R ₇The other end and T ₃Base stage b, C ₂Negative pole, R ₁₀Be electrically connected R ₈The other end and output L be electrically connected T ₃Emitter e and power supply B+ be electrically connected collecting electrode C and R ₁₁Be electrically connected.Electronic switching circuit (2) is by NPN aerotron T ₅, resistance R ₁₁, R ₁₂, R ₁₅, R ₁₇, diode D ₁, relay J is electrically connected forms T in the circuit ₅Emitter e, R ₁₂, D ₁Positive pole and power supply D-be electrically connected T ₅Base stage b and R ₁₂The other end and R ₁₁An end be electrically connected R ₁₁The other end and R ₁₆, R ₁₇An end and power supply B+ be electrically connected R ₁₆The other end and the moving contact of relay J be electrically connected R ₁₇The other end and output L be electrically connected the break back contact of relay J and current-limiting resistance R ₁₅An end and oscillating circuit in R ₈The other end be electrically connected R ₁₅The other end and output L be electrically connected.Overload protecting circuit is by NPN aerotron T ₄, resistance R ₁₃, R ₁₄Be electrically connected and form.T in the circuit ₄Base stage b and R ₁₃The other end and R ₁₂An end be electrically connected R ₁₂The other end and electronic switching circuit in R ₁₆An end be electrically connected T ₄Collecting electrode C and T ₃Base stage b be electrically connected.

Claims (2)

1, a kind of overload protection, electronics, electromagnetism combined type turning flash device; it is on the circuit card in insulated shell; oscillating circuit and electronic switching circuit are electrically connected in proper order; it is characterized in that: overload protecting circuit one end is electrically connected with oscillating circuit; the other end is electrically connected with sample resistance in the electronic switching circuit, and current-limiting resistance is connected between the break back contact and output L of relay J.

2, overload protection according to claim 1, electronics, electromagnetism combined type turning flash device, it is characterized in that: overload protecting circuit is by positive-negative-positive aerotron T ₄, resistance R ₁₃, R ₁₄Be electrically connected and form T ₄E, R ₁₃An end and power supply B+ be electrically connected T ₄B and R ₁₃The other end and R ₁₄An end be electrically connected R ₁₄The other end and sample resistance R ₁₆An end be electrically connected current-limiting resistance R ₁₅The break back contact of one end and relay J is electrically connected, and the other end and output L are electrically connected.

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