JP2000149156A - Anti-theft device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an anti-theft device that can be used in an open space. A mounting table, an antenna provided near the mounting table and emitting radio waves,
It comprises a transmitter 14 for supplying power to the antenna 13 and a receiver 16 attached to an article 15 mounted on the mounting table 12 and receiving a radio wave emitted from the antenna 13. The configuration is such that when the radio wave from 13 is received, the notification by the buzzer 21 is prohibited. Thereby, it can be effectively used even in an open space.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-theft device for preventing theft of goods.

[0002]

2. Description of the Related Art A conventional anti-theft device will be described below. As shown in FIG. 4, the conventional anti-theft device has been used in a store partitioned by a wall 1 of a fence. In FIG. 4, reference numeral 2 denotes an article mounting table on which the article 3 is mounted, and the article 3 is provided with a receiver 4.

[0005] Reference numeral 5 denotes an entrance of the store. Antennas 6 are provided at both ends of the entrance 5. here,
If the user attempts to exit from the entrance 5 with the receiver 4 attached to the article 3, the receiver 4 receives the radio wave emitted from the antenna 6 and informs the user that the article 3 has been illegally unloaded. It was like. As described above, the conventional anti-theft device is mainly used in a limited-sized store room.

[0004]

However, in recent years, as shown in FIG. 1, the antenna is often used in an open space 11 such as a department store. Since there is no place to do so, there is a problem that a conventional anti-theft device cannot be used.

An object of the present invention is to solve such a problem and to provide an anti-theft device which can be used even in an open space.

[0006]

In order to achieve this object, an anti-theft device according to the present invention has a configuration in which notification by a notification means is prohibited when a radio wave from an antenna is being received.

As a result, it can be effectively used even in an open space.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention provides an article mounting table, an antenna provided near the article mounting table and emitting radio waves, and a transmission for supplying power to the antenna. And a receiver attached to an article placed on the article mounting table and receiving a radio wave emitted from the antenna, wherein the receiver is receiving a radio wave from the antenna. It is a theft prevention device that prohibits the notification by the notification means,
In this way, when receiving the radio wave from the antenna, the notification by the notification means is prohibited, and the notification is performed by the notification means when the user is away from the article mounting table, so use it even in open spaces without restrictions such as entrances and exits. Can be.

According to a second aspect of the present invention, there is provided an alarming device which outputs at least one of a sound, light and a radio wave. Accordingly, the theft can be immediately recognized by the most appropriate notification means.

According to a third aspect of the present invention, there is provided a receiver for receiving a radio wave emitted from an antenna, a signal inversion circuit connected to an output of the reception circuit, and a signal inversion circuit connected to an output of the signal inversion circuit. And a notifying means connected to the output of the control circuit, wherein the output intensity of the notifying means is continuously changed according to the reception intensity of the radio wave emitted from the antenna. It is the anti-theft device described, and since the magnitude of the output intensity changes continuously, it is possible to know how far the article taken away illegally from the mounting table and to gradually output By increasing the intensity, ordinary customers will not be surprised by suddenly louder or other notification means.

According to a fourth aspect of the present invention, there is provided a receiver for receiving a radio wave emitted from an antenna, a signal inverting circuit connected to an output of the receiving circuit, and a signal inverting circuit connected to an output of the signal inverting circuit. Control circuit, having a notifying means connected to the output of the control circuit, according to the reception intensity of the radio wave emitted from the antenna, by the control means,
The anti-theft device according to claim 2, wherein the output frequency of the notification means is continuously changed, and the distance from the article mounting table can be notified by changing the timbre according to the frequency change.

According to a fifth aspect of the present invention, there is provided a receiver for receiving a radio wave emitted from an antenna, a signal inverting circuit connected to an output of the receiving circuit, and a signal inverting circuit connected to an output of the signal inverting circuit. And a notifying means connected to the output of the control circuit, and the control means intermittently outputs the output from the notifying means according to the reception intensity of the radio wave emitted from the antenna. In addition, the intermittent cycle is continuously changed, so that the intermittent cycle is changed, so that the distance from the article table can be known at intervals of the intermittent sound.

According to a sixth aspect of the present invention, there is provided a second receiver for receiving the notification by the notification means output from the receiver, and the second receiver is provided at a position apart from the article table. The anti-theft device according to claim 1, which is carried by a place or a store clerk, and the state of the article mounting table can be easily recognized through a device near or away from the article mounting table.

According to a seventh aspect of the present invention, a notification output from the notification means of the receiver of the anti-theft device according to any one of the first to fifth aspects is provided on each of the plurality of article mounting tables. The anti-theft device according to claim 6, further comprising a second transmitter for receiving, attaching a unique number to each article mounting table, and transmitting the number again. In addition to being able to know at a distance, it is possible to specify an abnormal article mounting table.

According to an eighth aspect of the present invention, the notifying means of the second receiver notifies the number unique to each article mounting table by at least one of sound and light. This is an anti-theft device, which can be detected by sound or light, so that it is possible to very clearly identify an abnormal article mounting table and know its state.

According to a ninth aspect of the present invention, the input of the control circuit selectively inputs either one of the direct output of the signal inverting circuit and the output of the receiving circuit.
The anti-theft device according to any one of the above, can be used in an open space as in the present invention by a switching function, and can be used in a closed space as in the related art.

According to a tenth aspect of the present invention, the notifying means includes a motor, a vibrating means for applying mechanical vibration by a vibrator connected to the motor, and a bell sounded by the vibrator of the vibrating means. The anti-theft device according to any one of claims 1 to 9, wherein the device is notified by a bell sound and a vibration, and the device is stolen by both the vibration and a stable bell sound using the vibration. It is easy to specify the goods that have been used.

According to the eleventh aspect of the present invention, the notifying means of the receiver is provided in a semi-transparent case having a substantially spherical or substantially hemispherical shape of the receiver and notifies the receiver by light. Since the entire receiver emits light, it is easy to find the receiver that is performing the notification even if a part of the receiver is hidden behind a shadow.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is an overall perspective view of an antitheft device according to Embodiment 1 of the present invention. In FIG. 1, 11
Is an open space, and this open space 11
An article mounting table (hereinafter simply referred to as a mounting table) 12 is provided at a specific position. An antenna 13 is provided on the mounting table 12. This antenna 13 is connected to a transmitter 14. Reference numeral 15 denotes an article, on which a receiver 16 is attached. Reference numeral 17 denotes a second transmitter provided on the mounting table 12. Reference numeral 18 denotes an accounting office. The accounting office 18 has a register 19 and a transmitter 1.
A second receiver 20 for receiving the seven radio waves is provided.

The operation of the anti-theft device configured as described above will be described below. The transmission power generated by the transmitter 14 is emitted from the antenna 13.
This radio wave is received by the receiver 16, and the receiver 16 does not ring while receiving this radio wave. (In the present embodiment, the notification is made by sound, but this may be light).

If the article 15 is to be removed from the mounting table 12 with the receiver 16 attached thereto, the radio waves emitted from the antenna 13 cannot receive the radio waves as the distance from the mounting table 12 increases. That is, at this time, the receiver 16 gradually increases the ringing sound to notify that the article 15 has been stolen (in the present embodiment, it is described that the sound pressure is increased. The intermittent cycle and frequency may be changed.)

At this time, when the receiver 16 emits radio waves as a notifying means, it is possible to know the abnormality in the store by making a sound or light notification through the second receiver 20 of the accounting office 18 or the clerk. it can. Further, the sound of the receiver 16 is detected by the transmitter 17 provided on the mounting table 12, and
The individually set unique data of the mounting table 12 is also transmitted to the second receiver 20 in the accounting office 18 at a remote location. Therefore, when the article 15 is stolen, the appearance of the article 15 is gradually changed by the light emitted from the two receivers 20.
To indicate if an alarm has been issued. For example, 21a is lit by a signal from the first transmitter 17, and 21b is lit by a signal from the second mounting table 12. By providing the display of the receivers 20 by the number of the mounting tables 12 in this way, it is possible to immediately know which mounting table 12 the signal is from.
Of course, characters and alphanumeric characters may be displayed directly.

Next, the details of the receiver 16 will be described with reference to FIG. The receiver 16 is provided with a detection conductor wire 17a,
The article 15 is locked by the detection conductor 17a (in the present embodiment, the detection of the attachment to the article 15 is performed by the detection conductor 17a.
However, the article 15 may be detected using a push switch or the like. ). The detection conductor 17a is connected to the attachment detection part 18a, and if the detection conductor 17
If an article 15 is stolen by cutting a, an alarm is issued. That is, a signal is output from the attachment detector 18a and input to the OR circuit 19a. The output of the OR circuit 19a is connected to the control circuit 20a, and the output of the control circuit 20a is alarmed by an alarm unit such as a buzzer 21. Therefore, when the detection conductor wire 17a is cut off, the buzzer 21 sounds as a buzzer sound through the attachment detection part 18a, the lower circuit 19a, the control circuit 20a, and the buzzer 21.

On the other hand, reference numeral 22 denotes a receiving circuit. The output of the receiving circuit 22 is connected to the above-mentioned OR circuit 19a via a signal inverting circuit 23. Reference numeral 14 denotes a transmitter, which is connected to the antenna 13.

Therefore, when the receiver 16 is located near the antenna 13, the radio wave from the antenna 13 is received by the receiving circuit 22, so that the signal is inverted by the signal inverting circuit 23 so that the buzzer 21 does not sound. Has become. However, when the receiver 16 is separated from the antenna 13, radio waves from the antenna 13 do not reach the receiving circuit 22. Then, the output of the signal inversion circuit 23 increases, and the buzzer 21 sounds.

If the signal inverting circuit 23 has a linear characteristic, the sound of the buzzer 21 continuously increases or decreases according to the reception intensity of the radio wave reflected from the antenna 13. If the control circuit 20a changes the frequency according to the output of the signal inversion circuit, the sound frequency of the buzzer 21 can be changed as the receiver 16 moves away from the antenna 13. Therefore, the distance to the antenna 13 can be known from the change in tone. If the cycle of the intermittent sound of the buzzer 21 is continuously changed in the control circuit 20a in accordance with the output of the signal inverting circuit 23, the intermittent sound of the buzzer 21 is intermittent as the receiver 16 moves away from the antenna 13. The period can be changed.

In this embodiment, the buzzer 21 is used as the alarm unit, but a speaker, a light emitting diode such as an LED, or the like may be used instead of the buzzer 21. The output of radio waves may be converted using a transmission circuit. Sounds such as the buzzer 21 and speakers can be used to detect theft even if the clerk is doing other work, and the use of light, such as LEDs, makes it easier to identify the receiver that is issuing the alarm. become. In addition, the use of radio waves makes it possible to know the presence or absence of theft through a portable receiver even in an environment where sound cannot be easily heard or where light cannot be seen directly.

In this embodiment, the receiver 16 gradually increases the sound pressure when the reception strength of the radio wave becomes weak, and emits the maximum sound pressure when the radio wave is cut off. When the radio wave is received again, the alarm stops.

In the receiver 16, the input of the OR circuit 19 a connected to the control circuit 20 is directly input to the receiving circuit 2.
2 can be used to generate an alarm by receiving radio waves as in the prior art. That is, when the output of the receiving circuit 22 is switched by a switch so as to be directly connected to the OR circuit 19a, if the alarm output provided in the control circuit 20a is output at least once, even if the radio wave from the receiving circuit 22 is interrupted. Can also be kept alerting continuously. As a result, once a radio wave is received as in the related art, it is possible to continue to generate an alarm, and the conventional system can be used.

(Embodiment 2) Next, the details of the receiver 25 according to Embodiment 2 will be described with reference to FIG. Receiver 2
Reference numeral 5 denotes a notifying unit that emits light, vibrates, and sounds. The light emitting means is a light emitting element 3 substantially at the center of the substrate 30.
The housing 32 of the receiver 25 is made of a semi-transparent resin such as polycarbonate, which has a hemispherical shape such as polycarbonate.
On the other hand, the notifying means includes a motor 33 for vibration and sound generation, and a weight 34 eccentrically mounted on the rotation axis of the motor 33.
And a resilient leaf spring 35 having one end mounted on the rotating shaft, and a bell 36 with which the other end of the leaf spring 35 contacts.

When the notification means is not operating, the housing 32 of the receiver 25 is covered with a translucent resin, so that the internal circuit configuration, the position of the detection switch, and the like cannot be seen. However, when the notification means operates, the light emitting element 31 on the substrate 30 is turned on, and the light is emitted in the entire hemispherical case. For this reason, even if the receiver 25 is slightly hidden behind an article or the like, or the receiver 25 is stored in the hand, the receiver 32 is easy to find because the entire housing 32 emits light.
On the other hand, while emitting light, the motor 33 also starts to rotate, and the eccentric weight 34 gradually vibrates the person holding the receiver 25 in hand, and the leaf spring 35 strikes the inner wall of the bell 36 every rotation. Emits a sound.

As described above, as the distance from the mounting table 12 increases, the number of rotations increases. As a result, the vibration increases and the sound generation increases continuously. As the user moves away from the mounting table 12 by these notification means, the notification is gradually strengthened, and these outputs are small in a normal state, so that they do not cause discomfort to customers, and in the case of theft, theft by sound, light and vibration. As well as facilitate discovery.

[0033]

As described above, according to the present invention, when a radio wave from an antenna is received, the notification by the notification means is prohibited, so that it can be used in an open space without being restricted by an entrance or the like. can do.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of an anti-theft device according to a first embodiment of the present invention;

FIG. 2 is a main block diagram of the same anti-theft device;

FIG. 3 is a fragmentary perspective view of a main part of a receiver of the anti-theft device according to the second embodiment.

FIG. 4 is a perspective view of a conventional anti-theft device.

[Explanation of symbols]

 12 Article mounting table 13 Antenna 14 Transmitter 15 Article 16 Receiver

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tadashi Katsukawa 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd. (reference) 5C084 AA03 AA09 AA13 BB31 CC19 DD07 EE07 GG18 HH03 HH07 HH12 HH13 HH20

Claims (11)

[Claims] An article mounting table, an antenna provided near the article mounting table and emitting radio waves, a transmitter for supplying power to the antenna, and an article mounted on the article mounting table. An anti-theft device that is attached and receives a radio wave emitted from the antenna, wherein the receiver prohibits the notification by the notification unit when receiving the radio wave from the antenna. 2. The anti-theft device according to claim 1, wherein the notification means outputs at least one of sound, light, and radio waves. 3. A receiver, comprising: a receiving circuit for receiving a radio wave emitted from an antenna; a signal inverting circuit connected to an output of the receiving circuit; a control circuit connected to an output of the signal inverting circuit; 3. The anti-theft device according to claim 2, further comprising a notifying unit connected to an output of the control circuit, wherein the output intensity of the notifying unit is continuously changed according to a reception intensity of a radio wave emitted from the antenna. 4. A receiver, comprising: a receiving circuit for receiving a radio wave emitted from an antenna; a signal inverting circuit connected to an output of the receiving circuit; a control circuit connected to an output of the signal inverting circuit; 3. The control circuit according to claim 2, further comprising: a notifying unit connected to an output of the control circuit, wherein the control unit continuously changes an output frequency of the notifying unit according to a reception intensity of a radio wave emitted from the antenna. Anti-theft device. 5. A receiver, comprising: a receiving circuit for receiving a radio wave emitted from an antenna; a signal inverting circuit connected to an output of the receiving circuit; a control circuit connected to an output of the signal inverting circuit; A notification unit connected to the output of the control circuit, wherein the control unit outputs the output from the notification unit intermittently in accordance with the reception intensity of the radio wave emitted from the antenna, 3. The anti-theft device according to claim 2, wherein the value is continuously changed. 6. A second receiver for receiving notification by the notification means output from the receiver, wherein the second receiver is carried by an accounting office or a store clerk at a position away from the article table. Item 7. The anti-theft device according to Item 1. 7. A plurality of article mounting tables, each of which receives the notification output from the notification means of the receiver of the anti-theft device according to any one of claims 1 to 5, and loads each article mounting table. 7. The anti-theft device according to claim 6, further comprising a second transmitter for attaching a number unique to the table and transmitting the number again. 8. The anti-theft device according to claim 6, wherein the notifying means of the second receiver notifies a number unique to each article mounting table by at least one of sound and light. 9. The theft according to claim 3, wherein an input of the control circuit selectively inputs one of a direct output of the signal inversion circuit and an output of the reception circuit. Prevention device. The notifying means includes a motor, a vibrating means for applying mechanical vibration by a vibrator connected to the motor, and a bell which is struck by the vibrator of the vibrating means, and the bell sound and the vibration are provided. The anti-theft device according to claim 1, wherein: 11. The anti-theft device according to claim 1, wherein the notifying means of the receiver is provided in a translucent case having a substantially spherical or substantially hemispherical shape of the receiver and notifies by a light.