KR19980023223A - License plate anti-theft device for vehicle - Google Patents

Abstract

The present invention relates to a vehicle license plate anti-theft device that prevents the license plate from being stolen by automatically inserting the license plate into the license plate protection box when the key is removed from the key holder of the vehicle. A pump 2, a hydraulic cylinder 3 having a shaft 5 and a piston 4 operated by the control of the hydraulic control unit 1, and fixed to the shaft 5 of the hydraulic cylinder 3. And a license plate case 6, which is moved left and right, and the protection box 12 into which the license plate case 6 is inserted / detached. When the vehicle is parked and the key is removed from the key holder, the hydraulic cylinder 3 is operated to operate the license plate 7. Is inserted into the protective box 12 to prevent theft of the license plate (7).

Description

License plate anti-theft device for vehicle

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle, and more particularly, to a license plate anti-theft device for a vehicle, in which the license plate is automatically inserted into the license plate protection box when the key is removed from the key holder of the vehicle to prevent the license plate from being stolen.

In general, the front and rear of the vehicle is attached to the license plate engraved with the unique number of the vehicle is useful in the event of a vehicle accident, when the vehicle is sold or various needs.

However, in the current license plate of the vehicle, the license plate on the front side is difficult to remove once combined, but the license plate on the rear side is combined only by screwing, so that the license plate can be easily separated and stolen. It is often urgently required to prevent theft of the license plate due to the frequent use of theft for bad use.

The present invention has been made to solve the above-mentioned drawbacks, and when the driver removes the key from the key holder, the license plate is automatically inserted into the license plate protection box to prevent theft as well as the driver turns on the key again. It is an object of the present invention to provide a license plate anti-theft device for a vehicle in which the license plate protrudes outward from the license plate protection box so that the license plate can be used normally.

In order to achieve the above object, the present invention installs a license plate protection box into which a license plate can be inserted into the trunk or rear bumper, installs a hydraulic or air cylinder, and automatically inserts the license plate into the protection box according to the key operation state of the key holder. / Is configured to be detached.

1 is an installation state diagram of the present invention.

2 is a structural diagram of the present invention

3 is a circuit diagram of the present invention.

Explanation of symbols for the main parts of the drawings

1: Hydraulic control unit 3: Hydraulic cylinder

4: piston 5: shaft

6: license plate case 7: license plate

8: Trunk 9: License plate attachment

10,11: 12 through: protection box

13: Key Holder T1, T2: Timer Switch

Q1-Q5: Transistor IC1-IC4: Comparators

RY1-RY5: Relay

1 is an installation state diagram of the present invention, Figure 2 is a mechanical configuration, forming a through hole (10, 11) on both sides of the numbered portion 9 of the trunk (8) a protective box inside the through hole (10) (12) is provided and connected to the license plate case (6) through the shaft (5) connected to the piston (4) of the hydraulic cylinder (3) installed in the trunk (8) through the through hole (11).

2 is a circuit diagram of a license plate anti-theft device of a vehicle according to the present invention, in which the non-inverting terminal (+) of the comparator IC1 is connected to the ACC, ON, and START terminals of the key holder 13 through the resistor R1. The terminal (-) is connected to apply a reference voltage REF1.

In addition, a transistor Q1 having a relay RY1 connected to the emitter is connected to an output terminal of the comparator IC1, and the hydraulic control unit 1 is connected to the relay RY1 through a timer switch T1. Connected.

In addition, the non-inverting terminal (+) of the comparator IC2 is connected to the relay RY1 through the resistor R2 in common, and the reference voltage REF2 is connected to the inverting terminal (-). The transistor Q2, to which the relay RY2 is connected, is connected to the emitter at the output terminal of IC2.

In addition, the hydraulic control unit 1 is connected to the contact of the relay RY2, and the non-inverting terminal (+) of the comparator IC3 is connected through the resistor R3, and the reference voltage REF3 is connected to the inverting terminal (−). Is connected, and the relay RY3 is connected to the output terminal of the comparator IC3 through the transistor Q3.

On the other hand, the inverter I1 is connected to the off terminal of the key holder 13 through a resistor R4, and the transistor Q4 connected to the emitter RY4 is connected to the emitter at the rear end of the inverter I1. The timer switch T2 is connected to the rear end of the relay RY4.

A comparator IC4 is connected to the rear end of the timer switch T2 via a resistor R5, and a transistor Q5 having a relay RY5 connected to the emitter is connected to the rear end of the comparator IC4. will be.

According to the present invention configured as described above, when the driver turns off the vehicle key, since the high level signal is inputted to the base of the transistor Q4 through the inverter I1, the transistor Q4 is turned on, whereby the coil of the relay RY4 is excited. As the relay RY4 is turned on, the timer switch T2 operates so that the voltage through the timer switch T2 is input to the non-inverting terminal (+) of the comparator IC4 while being input to the inverting terminal (-). In this case, since the voltage input to the non-inverting terminal (+) is higher than the reference voltage, a high level signal is output through the comparator IC4 to turn on the transistor Q4.

Accordingly, the relay RY5 connected to the emitter of the transistor Q4 is turned on to operate the hydraulic pump 2 to operate the hydraulic controller 1 and simultaneously operate the hydraulic cylinder 3 to operate the shaft 5. Since the license plate 7 is pushed to the left in the drawing, the license plate 7 is inserted into the protective box 12 to prevent the license plate 7 from being stolen. Since the operation of the cylinder 3 is operated only for a predetermined time by the timer switch T2, the license plate 7 is stopped after being inserted into the protective box 12 accordingly.

On the other hand, when the driver inserts the key into the holder 13 and starts, the voltage is applied to the non-inverting terminal (+) of the comparator (IC1) and compared with the reference voltage. In this case, the voltage of the non-inverting terminal (+) is the reference. Since the voltage is greater than the voltage, a high level signal is output through the output terminal of the comparator IC1, and the transistor Q1 is turned on.

Accordingly, the relay RY1 connected to the emitter of the transistor Q1 is turned on to operate the timer switch T1 and output a high level signal through the comparator IC2 to output the transistor Q2 and the relay RY2. Since the hydraulic pump 2 is turned on, the hydraulic cylinder 3 is operated by the control of the hydraulic control unit 1.

When the hydraulic cylinder 3 is operated in this way, the piston 4 is moved to the right in the drawing, whereby the license plate case 6 fixed to the shaft 5 is separated from the protective box 12 and returned to its original position. Therefore, the license plate (7) is exposed to the outside will be able to see the vehicle number.

In this case, since the hydraulic control unit 1 is controlled for a predetermined time by the timer switch T1, the piston 4 stops after moving a certain distance so that the license plate 7 can be accurately positioned in position. .

According to the license plate anti-theft device of the vehicle of the present invention as described above, when the driver turns off the key, the hydraulic cylinder 3 is operated by the control of the hydraulic control unit 1, and the license plate case 6 is automatically fitted with the license plate case 6 ) Is inserted into the protective box 12, when the operator turns on the key, the hydraulic cylinder 3 is operated by the control of the hydraulic control unit 1 and the license plate case 7 is automatically disengaged from the protective box 12. Therefore, even when the vehicle is not parked at night, the license plate (7) has an effect that can be prevented from being stolen.

Claims (2)

The through holes 10 and 11 are drilled on both sides of the license plate attaching portion 9 of the trunk 8 to install a protective box 12 inside the through hole 10, and the through hole 11 inside the trunk 8. A license plate anti-theft device for a vehicle, characterized in that it is connected to the license plate case (6) by passing through the shaft (5) of the piston (4) of the installed hydraulic cylinder (3). A non-inverting terminal (+) of the comparator IC1 is connected to the ACC, ON and START terminals of the key holder 10 through a resistor R1, and a reference voltage REF1 is connected to the inverting terminal (-). The transistor Q1 having a relay RY1 connected to an emitter is connected to an output terminal of the comparator IC1, and the hydraulic control unit 1 is connected to a contact of the relay RY1 through a timer switch T1. The non-inverting terminal (+) of the comparator IC2 is connected to the relay RY1 through the resistor R2 in common, and the reference voltage REF2 is connected to the inverting terminal (-). The output terminal of the IC2 is connected to a transistor Q2 having a relay RY2 connected to an emitter, and a hydraulic control unit 1 is connected to a contact of the relay RY2 and a comparator (R3) through a resistor R3. The non-inverting terminal (+) of IC3) is connected, the reference voltage REF3 is connected to the inverting terminal (-), and the transistor Q3 is connected to the output terminal of the comparator IC3. In which the relay RY3 is connected, the inverter I1 is connected to the off terminal of the key holder 10 via the resistor R4, and the relay RY4 is connected to the emitter at the rear end of the inverter I1. The connected transistor Q4 is connected, the timer switch T2 is connected to the rear end of the relay RY4, and the comparator IC4 is connected to the rear end of the timer switch T2 through the resistor R5. A rear plate anti-theft device for a vehicle, characterized in that a transistor (Q5) having a relay (RY5) connected to an emitter is connected to a rear end of the comparator (IC4).