JPH09128662A - Burglar prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To confirm the rest of the electric capacity of a battery built in a burglar preventive tool accurately through easy operation by applying the voltage of an operation power source to a terminal for voltage inspection only when the operation power supply from a power source means to a receiving means, etc., is cut off. SOLUTION: The power source means 12 of the burglar preventive tool 11 consists of the battery 22 which supplies operating electric power and a switch 23 which supplies or cuts off the electric power from the battery 22. When the switch 23 is off, a switch terminal 41 and a switch terminal 43 are connected and the plus electrode of the battery 22 is electrically connected to a 1st terminal 44 for voltage inspection. A 2nd terminal 45 for voltage inspection is connected to the minus electrode of the battery 22, so the voltage of the battery 22 is applied between the 1st and 2nd terminals 44 and 45 for inspection. Here, 1st and 2nd contact probes of a reset key 15 are connected to the 1st and 2nd terminals 44 and 45 for voltage inspection of the burglar preventive tool 11 and then the voltage inspecting means of the reset key 15 can measure the source voltage directly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antitheft device.

[0002]

2. Description of the Related Art Anti-theft devices currently in practical use include:
As shown in FIG. 9, an electromagnetic wave is transmitted from the surveillance antenna 100 into a predetermined area, and the antitheft device 101 attached to the article 1 monitored by the surveillance antenna 100 receives the electromagnetic wave transmitted from the surveillance antenna 100. However, when the anti-theft device 101 detects that the anti-theft device 101 has entered into a predetermined area, the anti-theft device 101 issues an alarm with a buzzer sound or the like.

The anti-theft device 101 receives the electromagnetic waves transmitted from the monitoring antenna 100 and detects the intrusion of the anti-theft device 101 into a predetermined area.
3, the alarm means 104 connected to the receiving means 103 for issuing an alarm, and the power supply means 102 for supplying operating power to the receiving means 103 and the alarm means 104. Reference numeral 105 denotes a release key used when the article 1 is removed from the antitheft device 101.

The operation of the anti-theft device constructed as above will be described below. First, as shown in FIG. 9, the detection conductor 110 derived from the receiving means 103 of the anti-theft device 101 is passed through the article 1. Then, the loop 110a at the tip of the detection conductor 110 is locked by the lock mechanism 111.
To lock it.

The power means 102 of the anti-theft device 101 comprises a battery 112 for supplying operating power and a switch 113 for supplying / shutting off the power from the battery 112. When the switch 113 is turned on, the receiving means 103 is energized. Then, it becomes ready to receive.

On the other hand, an electromagnetic wave of a specific frequency is transmitted to a predetermined area from the monitoring antenna 100 installed at the outlet of a store, such as the outlet of a retail store.

Now, when the article 1 is taken out from the exit with the anti-theft device 101 attached, the electromagnetic waves of a specific frequency band transmitted from the surveillance antenna 100 are received by the receiving means 103 built in the anti-theft device 101. Coil 1
The LC parallel resonance circuit formed by 14 and the capacitor 115 receives, and the received signal turns on the transistor 117 via the diode 116. Transistor 1
When 17 is turned on, the transistor 118 is turned on, power is supplied from the collector of the transistor 118 to the alarm means 104, and the buzzer 119 of the alarm means 104 emits an alarm sound by self-oscillation. Further, the collector output of the transistor 118 is connected to the base of the transistor 117 via the resistor 120, and the ON state of the transistor 117 is maintained. Therefore, even if the anti-theft device 101 is not able to receive the electromagnetic wave transmitted from the monitoring antenna 100 away from the predetermined area, the alarm sound is emitted intermittently. That is, the monitoring person is notified that the article 1 is taken out to the exit without permission.

A lock mechanism 11 of the antitheft device 101 is also provided.
Even when the antitheft device 101 is removed from the article 1 by cutting the detection conductor 110 without releasing 1, or tearing it off, the base of the transistor 117 is pulled up by the resistor 121 due to the disconnection of the detection conductor 110. Then, the transistor 117 is turned on, and an alarm sound is emitted in the same manner as when receiving.

The release key 105 turns on / off the switch 113 of the anti-theft device 101 with the pin 122. Similarly, the lock of the lock mechanism 111 is released by the pin 122.

In such an antitheft device, in order for the antitheft device 101 to operate normally, it is essential that the battery 112 be stably supplied with power. For this reason, the battery 112 of the anti-theft device 101 has been installed in the case of the anti-theft device 101 so as to be shielded from the outside so that the battery cannot be removed by mischief.

[0011]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
If 12 is installed inside the case of the anti-theft device 101 while being shielded from the outside, the remaining capacity of the electric capacity of the battery 112 cannot be directly measured. Therefore, in order to confirm whether or not the remaining electric capacity is sufficient, the anti-theft device 101
Was set to actually emit an alarm sound, and the remaining capacity of the electric capacity was estimated by the volume of the alarm sound at this time. Therefore, the operation is troublesome and the measurement accuracy is not high.

Further, if the anti-theft device 101 is provided with a voltage inspection circuit for checking the remaining amount of the electric capacity, the anti-theft device 101 becomes expensive and is not practical.

Therefore, the present invention has as its object the provision of an antitheft device and a key for releasing the antitheft device, by which the remaining amount of the electric capacity of the battery built in the antitheft device can be accurately confirmed by an easy operation. Is.

[0014]

In order to achieve this object, the anti-theft device according to the present invention is provided with a voltage inspection terminal for inspecting the voltage of the operating power supply from the outside in the power supply means. The terminal is configured so that the voltage of the operating power supply is applied only when the operating power supply from the power supply means to the receiving means and the alarm means is cut off. You can check the remaining capacity of the built-in battery.

[0015]

According to the first aspect of the present invention, since the power supply voltage can be directly measured from the voltage inspection terminal of the antitheft device, the antitheft device can be incorporated in the antitheft device accurately and easily. You can check the remaining battery capacity.

At this time, when the power of the anti-theft device is turned on, the power supply voltage is not applied to the voltage inspection terminal. Therefore, for the purpose of mischief or shoplifting, the voltage of the anti-theft device for inspection is checked. Even if the terminals are short-circuited, the electric capacity of the battery is not consumed, and it is possible to prevent malfunction of the antitheft device due to the decrease in the electric capacity.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
8 to FIG. FIG. 1 is a block diagram showing an anti-theft device according to the present embodiment, and the anti-theft device also includes a detailed circuit thereof.

In FIG. 1, 1 is an article, 10 is a monitoring antenna, 11 is an antitheft tool, and 15 is a release key. The anti-theft device 11 is composed of more detailed elements. That is, 12 is a power supply means built in the antitheft device 11, 13
Is a receiving means, and 14 is an alarm means, each of which has a circuit configuration as shown by a dotted line.

The details of the anti-theft device constructed as above will be described below. First, as shown in FIG. 1, the detection conductor 20 led out from the receiving means 13 of the antitheft device 11 is passed through the article 1. And the sensing conductor 2
The loop 20a at the tip of 0 is attached to the hook 32 of the lock mechanism 21.
To lock it.

The power supply means 12 of the anti-theft device 11 comprises a battery 22 for supplying operating power and a switch 23 for supplying / shutting off the power from the battery 22. The switch 23 is a three-terminal slide switch.

When the switch 23 is off, the switch terminal 41 and the switch terminal 43 are connected, and the positive terminal of the battery 22 is electrically connected to the first voltage checking terminal 44. Since the second voltage inspection terminal 45 is connected to the negative electrode of the battery 22, the voltage of the battery 22 is applied between the first voltage inspection terminal 44 and the second voltage inspection terminal 45. . At this time, since the switch terminal 41 and the switch terminal 42 are not connected, no power is supplied to the circuit side of the antitheft device 11.

When the switch 23 is turned on, the switch terminal 41 and the switch terminal 42 are connected and the receiving means 13 is energized to be in a receivable state. Switch terminal 4
1 and the switch terminal 43 are not connected, the first voltage inspection terminal 44 is insulated from the battery 22, and the voltage of the battery 22 cannot be measured by the voltage inspection terminal.

On the other hand, from the monitoring antenna 10 installed at the outlet of the store, an electromagnetic wave of a specific frequency is transmitted to a predetermined area such as the outlet of a retail store.

When the article 1 with the anti-theft device 11 still attached is to be taken out from the exit, the electromagnetic wave of a specific frequency band transmitted from the surveillance antenna 10 is received by the receiving means 13 built in the anti-theft device 11. The LC parallel resonance circuit including the coil 24 and the capacitor 25 receives the signal, and the received signal turns on the transistor 27 via the diode 26. When the transistor 27 is turned on, the transistor 28 is turned on, power is supplied from the collector of the transistor 28 to the alarm means 14, and the buzzer 29 of the alarm means 14 emits an alarm sound by self-oscillation. Further, the collector output of the transistor 28 is connected to the base of the transistor 27 via the resistor 30 and holds the on state of the transistor 27. Therefore, even if the anti-theft device 11 moves away from the predetermined area and cannot receive the electromagnetic wave transmitted from the monitoring antenna 10, the alarm sound is continuously emitted. That is, the person in charge of monitoring is informed that the article 1 will be taken out to the exit without permission.

Further, even when the antitheft device 11 is removed from the article 1 by cutting or tearing off the detection conductor 20 without releasing the lock mechanism 21 of the antitheft device 11, the disconnection of the detection conductor 20 is caused. Allows transistor 2
The base of 7 is pulled up by the resistor 31, the transistor 27 is turned on, and the alarm sound is emitted in the same manner as when the electromagnetic wave is received.

Next, the mechanism of the anti-theft device 11 in the anti-theft device of the present invention will be described with reference to FIGS. 2, 3 and 4.

FIG. 2 is a front view of the anti-theft device 11 in the anti-theft device of this embodiment, FIG. 3 is a right side view of the anti-theft device 11, and FIG. 4 is a left side view of the anti-theft device 11.

In FIG. 2, 11a is a case of the antitheft device 11 having a substantially circular shape, and 32 is a hook of the lock mechanism 21.

As shown by the chain double-dashed line in FIG.
When the lock is released, the tip of the hook 32 has an antitheft device 1
It is separated from the first case 11a. It is locked when the hook 32 is rotated and pushed into the main body of the antitheft device 11. The antitheft device 11 can be attached to the article 1 by hooking the tip loop 20 a of the detection conductor 20 on the hook 32 to lock the hook 32.

In FIG. 3, reference numeral 50 designates a lock release hole, and 51
Is a power-on hole, 53 and 54 are guide holes, and the lock release hole 50 and the power-on hole 51 are guide holes 53,
It is provided at a symmetrical position with respect to 54.

When the lock is released, the operation pin of the release key 15 is inserted into the lock release hole 50. Power on hole 51
Is the release key 1 when turning on the power of the antitheft device 11.
Insert the operation pin of 5. The guide hole 53 and the guide hole 54 are guide holes for positioning the release key 15 when the lock is released and the power is turned on. This guide hole 53
The guide hole 54 is formed by a counterbore hole so as not to penetrate the case 11a.

In FIG. 4, 52 is a power-off hole, 55 is a first voltage inspection hole, and 56 is a second voltage inspection hole.

The power-off hole 52 is a hole into which the operation pin of the release key 15 is inserted when the power of the anti-theft device 11 is turned off. The first voltage inspection hole 55 and the second voltage inspection hole 56 are holes into which the contact probe of the release key 15 is inserted when the voltage of the battery 22 of the anti-theft device 11 is measured. First voltage inspection hole 55 and second voltage inspection hole 56
Is formed by providing a through hole in the case 11a.

Here, the dimension between the first voltage inspection hole 55 and the second voltage inspection hole 56 is the same as that of the one guide hole 53 and the other guide hole 54. The dimensions of the first voltage inspection hole 55, the second voltage inspection hole 56, and the power-off hole 52 are the same as those of the guide holes 53 and 54 and the power-on hole 5.
1 or the same as the lock release hole 50.

Next, the release key 15 in the antitheft device of this embodiment will be described with reference to FIGS. 5, 6 and 7.

FIG. 5 is an external perspective view of the release key 15, FIG. 6 is a partially crushed view showing a state where the tag guide of the release key 15 is slid to the key case side, and FIG. 7 is a voltage inspection means incorporated in the release key 15. It is a circuit diagram of.

In FIG. 5, 60 is a key case of the release key 15, 61 is a tag guide, 62 is a first guide pin,
63 is a second guide pin, 64 is an operation pin, and 65 is a first
Contact probe, 66 is a second contact probe, and 67 is a voltage inspection switch.

The tag guide 61 slides when pressed toward the key case 60. First guide pin 62 and second
The guide pins 63 have the same dimensional intervals as the guide holes 53 and 54 or the first voltage inspection hole 55 and the second voltage inspection hole 56 of the anti-theft device 11, and should be fitted into these holes. Thus, the anti-theft device 11 and the release key 15 are positioned. The operation pin 64 performs on / off operation of the switch 23 of the antitheft device 11 and unlocking of the lock mechanism 21. The dimensions of the operation pin 64 and the guide pins 62, 63 are the same as those of the guide holes 53, 54 to the lock release hole 50 or the power-on hole 51. The first contact probe 65 and the second contact probe 66 are adapted to slide inside the first guide pin 62 and the second guide pin 63, respectively. And
It is connected to the first voltage inspection terminal 44 and the second voltage inspection terminal 45 through the first voltage inspection hole 55 and the second voltage inspection hole 56 of the anti-theft device 11, respectively, and is incorporated in the release key 15. Voltage inspection means and anti-theft device 1
No. 1 battery 22 is connected.

In FIG. 6, 68 is a probe guide, and 6
Reference numeral 9 denotes a coil spring, which urges the first contact probe 65 outward. Similarly, the second contact probe 66 is also urged outward.

When the tag guide 61 slides toward the key case 60, the operation pin 64, the first contact probe 65 and the second contact probe 66 stored in the tag guide 61 appear.

The operation pin 64 is fixed to the key case 60. The first contact probe 65 is a key case 60.
Probe guide 68 fixed to the
It is held by a coil spring 69 built in the unit 8. As a result, when the first contact probe 65 is pressed toward the key case 60 with a predetermined pressure or more, the coil spring 6
9 is compressed, and the tip of the first contact probe 65 can slide until it comes to the same position as the tip of the first guide pin 62. The second contact probe 66 also has the same holding method as that of the first contact probe 65. When the second contact probe 66 is pressed toward the key case 60 with a predetermined pressure or more, the tip of the second contact probe 66 becomes the first contact probe. It can be slid to the same position as the tip of the second guide pin 63.

In FIG. 7, reference numeral 65 is a first contact probe, 66 is a second contact probe, 73 is a power source for the release key 15, 74 is a power LED, 75 is a voltage detection IC, 78 is an inspection LED, and 79 is a load. It is resistance.

Now, the first contact probe 65 is connected to the first voltage inspection terminal 44 of the anti-theft device 11, and the second contact probe 66 is connected to the second voltage inspection terminal 45 of the anti-theft device 11. When connected, the first contact probe 65
Between the second contact probe 66 and the anti-theft device 11
The voltage of the battery 22 is applied.

When the voltage inspection switch 67 is turned on, the voltage inspection means is supplied with power from the key power source 73, and the power source LE is supplied.
D74 lights up.

The voltage detection IC 75 outputs a high impedance to the output 77 when the input voltage of the input 76 is a predetermined value or more, and outputs the output 7 when the input voltage of the input 76 is a predetermined value or less.
7 is a voltage inspection IC that outputs a ground to 7. The predetermined value of the input voltage is selected to be suitable for detecting the voltage drop of the battery 22 housed in the anti-theft device 11.

The input from the first contact probe 65 is input to the input 76 with a predetermined current load being applied by the load resistor 79. The load resistance 79 is for preventing the voltage of the battery 22 from becoming higher than the voltage in the actual operating state of the anti-theft device 11 by inserting a minute load, and the ringing state of the anti-theft device 11 is stopped. The current is set to flow approximately in the middle of the ringing state. When the voltage of the battery 22 is higher than the predetermined value of the input of the voltage detection IC 75, the output 77 becomes a high impedance output, and the inspection LED 78 is not turned on because it is not energized, indicating that the voltage of the battery 22 is normal. When the voltage of the battery 22 is lower than the predetermined value of the input of the voltage detection IC 75, the output 77 becomes the ground output, and the inspection LED 78 is supplied with power from the key power source 73 and lights up to display the voltage drop of the battery 22.

Release key 1 having the above-mentioned configuration
The operation of the anti-theft device 11 by 5 will be described with reference to FIG.

FIG. 8 is a plan view showing the internal structure of the antitheft device 11. In FIG. 8, 17 is a leaf spring for locking the hook 32, 47 is a circuit board, and 46 is a slide knob of the switch 23.

The first guide pin 62 of the release key 15 is aligned with the first voltage inspection hole 55, the second guide pin 63 is aligned with the second voltage inspection hole 56, and the release key 15 is protected against theft 11. Press against. Then, the operation pin 64 first enters the power-off hole 52, and then the first contact probe 65 and the second contact probe 66 are connected to the first voltage inspection hole 55 and the second voltage inspection hole 55.
From the voltage inspection holes 56 of the above. Operation pin 64
Contacts the slide knob 46 of the switch 23 and slides the slide knob 46 to the right in FIG. As a result, the switch terminal 41 and the switch terminal 42 are insulated, the power of the anti-theft device 11 is turned off, the switch terminal 41 and the switch terminal 43 are connected, and the first voltage inspection terminal 44 and the second voltage Between the inspection terminals 45, the battery 2
A voltage of 2 is applied.

A first voltage inspection terminal 44 is installed on the circuit board 47 in front of the first contact probe 65 which enters through the first voltage inspection hole 55. It is connected to the first voltage inspection terminal 44. Similarly, in front of the second contact probe 66 that enters through the second voltage inspection hole 56, the second voltage inspection terminal 45 is installed on the circuit board 47, and the second contact probe 6 is provided.
6 is connected to the second voltage inspection terminal 45. As a result, the voltage of the battery 22 can be checked with the release key 15, and the remaining capacity of the battery 22 can be checked.

Also, the first guide pin 6 of the release key 15
2 to the guide hole 53 and the second guide pin 63 to the guide hole 54, and the release key 15 to the antitheft device 11.
When pressed against, the operation pin 64 enters the power-on hole 51. The operation pin 64 is a slide knob 4 of the switch 23.
6 and slide the slide knob 46 to the left in FIG. Thereby, the switch terminal 41 and the switch terminal 42 are connected, the power of the anti-theft device 11 is turned on, the switch terminal 41 and the switch terminal 43 are insulated, and the first voltage inspection terminal 44 and the second voltage inspection terminal 44 are connected. The voltage of the battery 22 is not applied between the inspection terminals 45. At this time, since the guide hole 53 and the guide hole 54 are counterbored holes that do not penetrate the case 11a of the antitheft device 11, the first contact probe 65 and the second contact probe 66 slide toward the key case 60, It does not enter the inside of the antitheft device 11.

Further, the first guide pin 6 of the release key 15
2 to the guide hole 54 and the second guide pin 63 to the guide hole 53, and the release key 15 to the antitheft device 11.
When pressed against, the operation pin 64 enters the lock release hole 50 and presses the leaf spring 17. The leaf spring 17 is deformed as shown by the dotted line in FIG. 8, is separated from the hook 32, and is unlocked. Also at this time, the first contact probe 65 and the second contact probe 66 do not slide into the antitheft device 11 by sliding toward the key case 60.

As described above, according to this embodiment, the first voltage inspection terminal 44 and the second voltage inspection terminal 45 of the anti-theft device 11 are connected to the first contact probe 65 of the release key 15 and the first voltage inspection terminal 45. Since the power supply voltage can be directly measured by the voltage inspection means of the release key 15 by connecting the second contact probe 66, the remaining capacity of the electric capacity of the battery 22 built in the anti-theft device 11 can be accurately measured by an easy operation. You can check.

Furthermore, when the power of the anti-theft device 11 is turned on, the first voltage inspection terminal 4 of the anti-theft device 11 is provided.
4 and the second voltage inspection terminal 45, the antitheft device 11
Since the voltage of the battery 22 housed inside is not applied, the first anti-theft device 11 is in use for mischief or shoplifting.
Even when the voltage inspection terminal 44 and the second voltage inspection terminal 45 are short-circuited, the electric capacity of the battery 22 is not consumed, and malfunction of the antitheft device 11 due to the decrease in electric capacity can be prevented. it can.

Since the release key 15 has a voltage inspection means for unlocking the anti-theft device 11 and determining whether the battery voltage stored in the anti-theft device is appropriate, the anti-theft device can be operated by the release key 15. Both 11 unlocking and voltage measurement can be performed.

Further, the release key 15 is provided with display means for judging whether the voltages of the battery 22 housed in the anti-theft device 11 and the internal power source 73 are appropriate, and this display means is driven by the internal power source 73. Therefore, a clear display can be performed without being affected by the remaining amount of the electric capacity of the battery 22 housed in the anti-theft device 11. Also, to display the battery 2
Anti-theft device 1 because it does not consume the electric capacity of 2
The power consumption of 1 can be reduced.

Furthermore, the release key 15 is the antitheft device 1.
First contact probe 6 to which the voltage of the first battery 22 is input
5 and the second contact probe 66, and this contact probe 6
Load resistance 79 connected to 5, 66 and this load resistance 7
9 and a voltage detecting means connected after 9 and the value of the load resistance 79 is substantially equal to the load impedance of the anti-theft device 11, so that the battery 2 of the anti-theft device 11 is
The voltage of 2 can be accurately measured in a state substantially equal to that in actual use.

On one side surface of the antitheft device 11,
The guide holes 53 and 54 and the lock release hole 50 and the power-on hole 51 are provided at positions L symmetrical to the guide holes 53 and 54, and the other side surface has a first voltage inspection hole that also serves as a guide hole. 55 and second voltage inspection hole 56 through L
The power-off hole 52 is provided at the position of, and the release key 15 is provided with guide pins 62 and 63 that fit into the guide holes 53 and 54 and the voltage inspection holes 55 and 56, respectively. Since the operation pin 64 is provided at the position, the anti-theft device 11 can be unlocked and the power can be turned off / on with the release key 15, and only one operation pin 64 is required for the release key 15, so the release key 15 can be made compact. Can be converted.

Further, the guide pins 62, 6 of the release key 15
3 and the guide holes 53 and 54 and the voltage inspection holes 55 and 56 of the anti-theft device 11, respectively.
Since the voltage inspection terminals 44 and 45 are provided in the inner portions of the reference numerals 5 and 56, and the contact probes 65 and 66 that are slidable are provided in the guide pins 62 and 63, the release key 15 can be miniaturized. . Further, the voltage inspection holes 55 and 56 of the anti-theft device 11 have the function of the guide hole and the contact probe 65,
The anti-theft device 1 has both functions of the insertion port of 66.
1 can be miniaturized.

[0060]

As described above, according to the anti-theft device of the present invention, the power supply means is provided with the voltage inspection terminal for inspecting the voltage of the operating power supply from the outside, and the voltage inspection terminal is the power supply means. Since the operating power supply voltage is applied only when the operating power supply to the receiving means and the alarm means is cut off, the power supply voltage can be directly measured from the voltage inspection terminal of the antitheft device. Therefore, it is possible to accurately confirm the remaining amount of the electric capacity of the battery built in the antitheft device by an easy operation.

When the power of the anti-theft device is turned on, the power supply voltage is not applied to the voltage inspection terminal. Therefore, the voltage inspection terminal of the anti-theft device in use is short-circuited for the purpose of mischief or shoplifting. However, the electric capacity of the battery will not be consumed, and the malfunction of the antitheft device due to the decrease of the electric capacity can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram of an anti-theft device according to an embodiment of the present invention.

FIG. 2 is a front view of the antitheft device of FIG.

FIG. 3 is a right side view of the anti-theft device in FIG.

FIG. 4 is a left side view of the anti-theft device shown in FIG.

FIG. 5 is an external perspective view of the release key.

FIG. 6 is a partially cutaway front view showing a state where the tag guide of the release key is slid to the key case side.

FIG. 7 is a circuit diagram of voltage inspection means built in the release key.

FIG. 8 is a plan view showing the internal structure of the antitheft device of FIG.

FIG. 9 is a block diagram of a conventional antitheft device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Article 10 Monitoring antenna 11 Anti-theft device 12 Power supply means 13 Receiving means 14 Alarm means 15 Release key 22 Battery 23 Switch 44 First voltage inspection terminal 45 Second voltage inspection terminal

Claims (6)

[Claims] 1. An anti-theft device attached to an article and a release key for removing the anti-theft device from the article, wherein the anti-theft device receives an electromagnetic wave transmitted from the surveillance antenna and is within a predetermined area. Receiving means for detecting intrusion into the vehicle, alarm means for connecting to the receiving means and for issuing an alarm when the vehicle enters a predetermined area, and power source means for supplying operating power to the receiving means and the alarm means. The power supply means is provided with a voltage inspection terminal for externally inspecting the voltage of the operation power supply, and the voltage inspection terminal is used to supply operation power from the power supply means to the reception means and the alarm means. An anti-theft device in which the voltage of the operating power supply is applied only when the power is cut off. 2. The anti-theft device according to claim 1, wherein the release key has voltage inspection means for unlocking the anti-theft device and determining whether the voltage of the battery stored in the anti-theft device is appropriate. 3. The release key is provided with an internal battery and display means for determining whether or not the voltage of the battery housed in the anti-theft device is appropriate, and the display means is driven by the internal battery.
Anti-theft device as described. 4. The release key comprises a contact probe into which the battery voltage of the anti-theft device is input, a load resistance connected to the contact probe, and a voltage detection means connected after the load resistance. The antitheft device according to claim 3, wherein the value of the load resistance is substantially equal to the load impedance of the antitheft device. 5. A first guide hole and a lock release hole and a first power switch control hole are provided at a position L symmetrical to the first guide hole on one side surface of the anti-theft device.
A second guide hole is provided on the other side surface, a second power switch control hole is provided at a position L from the second guide hole, and the release key is provided with the first guide hole and the second guide hole. The anti-theft device according to claim 2, wherein a guide pin fitted into the guide hole is provided, and an operation pin is provided at a position L from the guide pin. 6. The method according to claim 4, wherein two guide pins and two guide holes are provided, a voltage inspection terminal is provided at the inner part of the guide hole, and a slidable contact probe is provided in the guide pin. Anti-theft device described in 5.