CN201126109Y - Novel key ring LED currency examination flashlight - Google Patents

Abstract

The utility model discloses a novel key ring LED currency examine flashlight. The currency detecting flashlight comprises a rechargeable battery, an illuminating lamp, a currency detecting lamp and a controller, wherein the currency detecting flashlight is provided with a charging interface; the controller comprises a charging circuit, a booster circuit, a change-over switch and a control circuit, only one button is arranged on the currency detecting flashlight, and the lighting lamp and the currency detecting lamp can be switched through the button; the problem of carry the in-process, touch the switch, cause unnecessary waste is solved. The utility model discloses simple structure, appearance are pleasing to the eye, and use cost is low, excellent in use effect, have market competition in the aspect of the price/performance ratio, can bring the convenience for the user.

Description

A New Type of Keychain LED Money Detecting Flashlight

technical field

The utility model relates to a banknote checking flashlight, in particular to a keychain LED banknote checking flashlight which only uses one switch to control a banknote checking lamp and a lighting lamp and can be charged.

Background technique

Flashlights can meet the emergency lighting needs of people working and living in various dark environments indoors and outdoors. Due to the modern superb simulation and counterfeiting technology, counterfeit banknotes make it difficult for people to completely identify counterfeit banknotes in circulation with the naked eye. Lighting, banknote detection function and easy to carry, practical key chain LED banknote detection flashlight is widely used. However, the current keychain LED banknote detection flashlight has two disadvantages: the flashlight is equipped with two switches that control the banknote detection lamp and the lighting light respectively. Since the keychain LED currency detection flashlight itself is small in size, two switches are placed in a limited space. , which increases the difficulty of processing and installation, and affects the overall aesthetics; the second is that in the process of carrying, it is easy to touch the switch, so that the LED light is turned on, causing unnecessary waste of electricity; the third is the current keychain LED The banknote detection flashlight uses a disposable battery, and the battery needs to be replaced after the battery power is used up, which is expensive to use. From the above, it can be seen that the key chain LED banknote detection flashlight currently on the market lacks market competitiveness in terms of cost performance, and cannot well meet the needs of consumers.

Contents of the invention

In order to overcome the deficiencies of the prior art, the utility model provides a new keychain LED banknote detection flashlight with simple structure and good use effect.

The technical scheme that the utility model solves its technical problem adopts is:

A new type of keychain LED banknote checking flashlight, including a battery, a lighting lamp, a banknote checking lamp and a controller, the battery is a rechargeable battery; the banknote checking flashlight is provided with a charging interface; the controller includes a charging circuit, a boost circuit, a transfer switch and a control circuit, the charging interface is connected to the charging circuit, the battery and the charging circuit are connected in parallel and then connected to the input end of the boost circuit through the transfer switch, and the boost circuit feeds the control circuit, lighting and The currency detector lamp is powered, and the control circuit is connected to the lighting lamp and the currency detector lamp.

In addition, further, the charging circuit is an anti-reversal input constant current charging circuit composed of the first diode, the first triode, the second triode and the three-terminal voltage regulation reference; the first triode The emitter of the second transistor is connected to the base of the second triode and the reference input terminal of the reference voltage regulator. The boost circuit is a power boost circuit composed of a power chip, an inductor, and a third diode. After the power chip and the third diode are connected in parallel, one end is connected to the inductor, and the other end is connected to the lighting lamp, the money detector lamp and the control lamp. circuit. After the power supply chip and the third diode are connected in parallel, one end of the control circuit is connected in parallel with a third polarity capacitor, and the negative pole of the third polarity capacitor is connected to the negative pole of the power supply. The control circuit includes a control chip, a fourth triode and a fifth triode. The clock input terminal of the control chip is connected to a second polarity capacitor, and the negative pole of the second polarity capacitor is connected to the negative pole of the power supply; the output terminals of the control chip are respectively connected to the fourth The bases of the triode and the fifth triode, the collectors of the fourth triode and the fifth triode are connected to the step-up circuit, and the emitters of the fourth triode and the fifth triode are respectively connected to the money detector lamps and lights.

The beneficial effect of the utility model is that: the key chain LED banknote detection flashlight of the utility model is provided with a charging interface, and the battery adopted is a rechargeable battery, which reduces the cost of use; There is only one button, and the illuminating lamp and the banknote inspection lamp can be switched through the button; it solves the needless waste caused by bumping into the switch during carrying. The utility model has an input voltage of 5V-12V, and can be charged by a mobile phone charger, a computer USB interface, a car 12V power supply, and other 5V-12V DC power supplies. The charging method is flexible, convenient, simple in structure, beautiful in appearance, and good in use. In terms of cost performance, it has market competitiveness and can bring convenience to users.

Description of drawings

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

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

Fig. 2 is a schematic circuit diagram of the utility model;

Fig. 3 is the appearance schematic diagram of the utility model;

Fig. 4 is another schematic view of the appearance of the utility model.

Detailed ways

With reference to Fig. 1 to Fig. 4, a kind of new-style keychain LED banknote checking flashlight comprises battery 2, lighting lamp 6, banknote checking lamp 7 and controller, and described battery 2 is a rechargeable battery; Described banknote checking flashlight is set There is a charging interface J1; the controller includes a charging circuit 1, a boost circuit 3, a transfer switch 4 and a control circuit 5, the charging interface is connected to the charging circuit, and the battery 2 and the charging circuit 1 are connected in parallel and then converted The switch 4 is connected to the input end of the voltage boosting circuit 3, and the voltage boosting circuit 3 supplies power to the control circuit 5, the lighting lamp 6 and the banknote checking lamp 7, and the control circuit 5 is connected to the lighting lamp 6 and the banknote checking lamp 7.

The charging circuit 1 is an anti-reversal input constant current charging circuit composed of the first diode D1, the first triode Q1, the second triode Q2 and the three-terminal voltage regulator Q3; the first triode Q1 The emitter is connected to the base of the second triode Q2 and the reference input terminal of the voltage regulation reference Q3. The input voltage is 5V-12V, and it can be charged by mobile phone charger, computer USB interface, car 12V power supply, and other 5V-12V DC power supply. The charging method is flexible and convenient.

The boost circuit 3 is a power boost circuit composed of a power chip IC2, an inductor L1, and a third diode D3. After the power chip IC2 and the third diode D3 are connected in parallel, one end is connected to the inductor L1, and the other end is connected to the lighting Lamp 6, banknote detection lamp 7 and control circuit 5 boost the 1.2V of the battery to the LED operating voltage of 4V.

The power supply chip IC2 and the third diode D3 are connected in parallel, and one end of the control circuit 5 is connected in parallel with a third polarity capacitor C3, and the negative pole of the third polarity capacitor C3 is connected to the negative pole of the power supply.

The control circuit includes a control chip IC1, a fourth triode Q4, and a fifth triode Q5. The clock input terminal of the control chip IC1 is connected to a second polarity capacitor C2, and the negative pole of the second polarity capacitor C2 is connected to the negative pole of the power supply; the control chip The output terminal of IC1 is respectively connected to the bases of the fourth transistor Q4 and the fifth transistor Q5, the collectors of the fourth transistor Q4 and the fifth transistor Q5 are connected to the step-up circuit 3, and the fourth transistor Q4 and the emitter of the fifth triode Q5 are respectively connected to the banknote inspection lamp 7 and the lighting lamp 6.

The utility model adopts lighting LED D6, LED D7 and LED D8 three groups of lighting lamps, which increases the illumination brightness. The charging indicator light-emitting diode D2 is connected in the circuit, which is convenient for users to charge. Hanging holes 8 are provided on the shell of the banknote checking flashlight, which is easy to carry.

When in use, when the switch S1 is turned on for the first time, pin 14 of the control chip IC1 receives a pulse signal. At this time, pin 3 of the control chip IC1 is at high level, pin 2 is at low level, and the fifth triode Q5 conduction, lighting LED D6, LED D7 and LED D8 work. When the switch S1 is turned off, the second polarity capacitor C2 is discharged immediately and the second polarity capacitor C3 can maintain the power supply of the control chip IC1 for more than 5 seconds. When the S1 switch is turned on again within 5 seconds, the pin 14 of the control chip IC1 After receiving the second pulse signal, pin 2 of the control chip IC1 becomes high level, and pin 3 becomes low level. The fourth triode Q4 is turned on, and the banknote detection LED D5 works. Each time it is pressed, a conversion is completed. , such a cycle operation, can switch between the lighting lamp and the banknote inspection lamp, the operation is simple and convenient.

The model of the voltage stabilizing reference Q3 adopted by the utility model is TL431, the model of the power supply chip IC2 is BL8530-401, and the model of the control chip IC1 is 4017. Of course, it can also be other chips or circuits with the same or similar functions, as long as it is The equivalent modifications and changes made according to the protection scope of the present utility model still belong to the scope covered by the present invention.

Claims (5)

1. A novel key chain LED banknote detection flashlight, comprising a battery (2), an illuminating lamp (6), a banknote detection lamp (7) and a controller, is characterized in that the battery (2) is a rechargeable battery; The banknote detection flashlight described above is provided with a charging interface (J1); the described controller includes a charging circuit (1), a boost circuit (3), a transfer switch (4) and a control circuit (5), and the described charging interface ( J1) is connected to the charging circuit (1), after the battery (2) and the charging circuit (1) are connected in parallel, the input terminal of the boost circuit (3) is connected through the transfer switch (4), and the boost circuit (3) feeds the control circuit ( 5), the illuminating lamp (6) and the banknote checking lamp (7) are powered, and the control circuit (5) is connected with the illuminating lamp (6) and the banknote checking lamp (7). 2. A new type of key chain LED banknote detection flashlight according to claim 1, characterized in that the charging circuit (1) is composed of a first diode (D1), a first triode (Q1), The anti-reversal input constant current charging circuit composed of the second transistor (Q2) and the three-terminal voltage regulator reference (Q3); the emitter of the first transistor (Q1) is connected to the base of the second transistor (Q2) and regulated reference (Q3) reference input. 3. A new type of key chain LED banknote detection flashlight according to claim 1, characterized in that the boost circuit (3) is composed of a power chip (IC2), an inductor (L1), a third diode ( D3) constitutes a power boost circuit, the power chip (IC2) and the third diode (D3) are connected in parallel, and one end is connected to the inductor (L1), and the other end is connected to the lighting lamp (6), money detector lamp (7) and control circuit (5). 4. According to claim 3, a new type of key chain LED banknote detection flashlight is characterized in that the power chip (IC2) and the third diode (D3) are connected in parallel and then one end of the control circuit (5) is connected in parallel with a third The polarity capacitor (C3), the negative pole of the third polarity capacitor (C3) is connected to the negative pole of the power supply. 5. A new type of key chain LED banknote detection flashlight according to claim 1, characterized in that the control circuit includes a control chip (IC1), a fourth triode (Q4) and a fifth triode (Q5), the control circuit The clock input terminal of the chip (IC1) is connected to the second polarity capacitor (C2), and the negative pole of the second polarity capacitor (C2) is connected to the negative pole of the power supply; the output terminal of the control chip (IC1) is respectively connected to the fourth triode (Q4) and The base of the fifth transistor (Q5), the collectors of the fourth transistor (Q4) and the fifth transistor (Q5) are connected to the step-up circuit (3), the fourth transistor (Q4) and the The emitters of the five triodes (Q5) are respectively connected to the money detector lamp (7) and the lighting lamp (6).

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