JPH11134582A - Theft prevention system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a theft prevention system that can prevent an unlawful use of an invalidation device for forcing to stop a generation of an alarm of an alarm unit. SOLUTION: This invalidation device is equipment with an invalidation signal generation part 15 for generating an invalidation signal and a control part 14 for counting for a prescribed time and performing an on/off control of a mode changeover switch 16 intervening between the invalidation signal generation part 15 and a transmission antenna 18. On the other hand, a start-up device is equipped with a generation part 23 for generating a start-up signal to be supplied to the invalidation device, and the start-up device and the invalidation device respectively have connection terminals (a) and (b) and connection terminals (a') and (b') to be brought into contact with each other in a state that the invalidation device is housed in a hosing part of the start-up device. A control part 14 of the invalidation device receives the start-up signal and turns on the mode changeover switch 16. When a supply of the start-up signal is stopped, the control part starts a counting and, when a specified time passes, the mode changeover switch 16 is turned off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-theft system for protecting goods displayed in a store from shoplifting and other fraudulent activities, and more particularly, to a disabling system capable of forcibly stopping an alarm unit from generating an alarm. The present invention relates to an anti-theft system including a device.

[0002]

2. Description of the Related Art Conventionally, in a store which sells products such as compact disk cassettes and magnetic tape cassettes for display, in order to protect these products from fraudulent acts such as shoplifting, a theft prevention system as shown in FIG. Has adopted. The anti-theft system comprises an anti-theft gate (4) installed near an outlet (40) of a store, and an alarm unit (3) attached to a product (5). A circuit board (41) and a transmission antenna (not shown) are built in the anti-theft gate (4), and the circuit board (41) is provided with a transmission circuit (not shown) for generating an alarm activation signal for the alarm unit (3). It has.

The alarm unit (3) is, as shown in FIG.
A buzzer (31), a circuit board (33), a battery (not shown), etc. are provided inside the casing (30), and a plurality of sound emission holes (34) are opened on the surface of the casing (30), The alarm actuating switch piece (32) is protruded. Buzzer (31), circuit board (33)
The operation is controlled by the alarm unit from the product
The sound is emitted when (3) is removed or when the alarm unit (3) passes through the anti-theft gate (4). At the store, the goods are displayed on the display stand with the alarm unit (3) attached. When a clerk sells a product to a customer, a specific signal is sent from a nullification device (not shown) to the circuit board (33) of the alarm unit (3) to output a buzzer (31).
, The alarm unit (3) is removed from the product, and the product is handed to the customer in exchange for the price.

[0004] A customer illegally sends an alarm unit (3) from a product (5).
When the is removed, the alarm operation switch piece (32) is turned off, and the buzzer (31) sounds. If the customer illegally takes the product (5) out of the store together with the alarm unit (3), the circuit board (33) of the alarm unit (3) is moved from the transmitting antenna of the anti-theft gate (4). Upon receiving the alarm activation signal, the buzzer (31) sounds.

[0005]

However, in the above-described anti-theft system, there is a risk that a customer or a temporary clerk may steal the invalidation device from the store, and the customer who has stolen the invalidation device may be stolen by another customer. The alarm unit (3) can be removed from the product after illegally using the invalidation device at the store and setting the alarm unit (3) not to sound. There is a problem that the product is easily taken out of the store. An object of the present invention is to provide an anti-theft system capable of preventing unauthorized use of a nullification device.

[0006]

An anti-theft system according to the present invention comprises an alarm unit to be coupled to an object to be stolen, and a nullification device for transmitting a nullification signal to the alarm unit. The alarm unit includes an alarm unit that can issue an alarm, a detection unit that detects that the connection state with the anti-theft object has been disconnected, and generates a detection signal, and an alarm unit that receives the detection signal. Alarm control means for operating, upon receiving an invalidation signal from the invalidation device, invalidating a subsequent detection signal. On the other hand, the disabling device includes a disabling signal generating unit that constantly generates a disabling signal in the operation on mode or generates a disabling signal in response to a user operation, and a start command generation that issues a start command in response to a user operation. Means, a variable generating means for generating a variable that increases in accordance with the passage of time or the number of user operations for generating the invalidation signal, a reset means for resetting the variable generating means in response to the user operation, Invalidation control for setting the invalidation signal generation means to the operation on mode while receiving the start command and setting the invalidation signal generation means to the operation off mode when the variable generated from the variable generation means exceeds a predetermined threshold. Means.

[0007] When the above-described anti-theft system is implemented in, for example, a store for commodities, the commodities to be subjected to the theft prevention are combined with an alarm unit and displayed on a display stand.
When the customer illegally disconnects the connection state between the product taken out of the display stand and the alarm unit, the detecting means generates a detection signal, and the alarm control means of the alarm unit operates the alarm means in response to the detection signal. As a result, a warning is issued from the warning means, and the wrongdoing is reported to the surroundings.

[0008] On the other hand, the invalidating device is carried by a clerk at least from the time of opening the store to the time of closing the store. When the store clerk performs an operation for generating a start command in the start command generating unit, the start command generating unit issues a start command in accordance with the operation, and the invalidation control unit receives the start command and disables the start command. Set the activation signal generation means to the operation on mode. As a result, the invalidation signal generating means constantly generates the invalidation signal,
Alternatively, an invalidation signal is generated in response to a user operation. When the store clerk performs an operation for resetting the variable generating means at the time of opening the store, the resetting means resets the variable generating means and initializes the variables of the variable generating means to zero.

When the customer hands over the merchandise and the alarm unit to the clerk in a combined state, and the clerk sends an invalidation signal from the invalidation device to the alarm unit, the alarm control means receives the invalidation signal and receives the invalidation signal. The subsequent detection signal is invalidated. As a result, the alarm unit forcibly stops generating an alarm regardless of the input of the detection signal. In this way,
The clerk sets the alarm unit to a state in which the generation of the alarm is forcibly stopped, disconnects the connection state of the product and the alarm unit, and hands the product to the customer.

Thereafter, when the variable generated by the variable generation means exceeds a predetermined threshold value, the invalidation control means detects this and sets the invalidation signal generation means to the operation off mode. Here, when the variable generating means generates a variable that increases with the passage of time, the predetermined threshold is set to a time from the opening of the store to the closing of the store, for example, 8 hours. In this case, the invalidation signal is generated when the store is closed. The means will be set to the operation off mode. Further, when the variable generation means generates a variable that increases in accordance with the number of user operations for generating the invalidation signal, the predetermined threshold is set to a value corresponding to the frequency of use of the invalidation device. In this case, the invalidation signal generating means is set to the operation off mode when the user performs an operation for generating the invalidation signal a predetermined number of times. When the invalidation signal generating means is set to the operation off mode as described above, the generation of the invalidation signal is stopped, or regardless of the user operation for generating the invalidation signal,
The generation of the invalidation signal is forcibly stopped. Therefore, even if a customer or a temporary clerk steals the invalidation device and uses the invalidation device at another store, no invalidation signal is generated from the invalidation device. Loses effect.

[0011] The first anti-theft system having a specific configuration further includes an activation device for transmitting an activation signal to the nullification device, the activation device comprising activation signal generating means for generating an activation signal. Transmitting means for transmitting the activation signal created by the activation signal creating means to the invalidating device, wherein the invalidating device can receive the activation signal from the transmitting means of the activation device by a user operation. The start command generation means receives a start signal from the reception means and issues a start command, and the reset means resets the variable generation means when the reception signal is no longer received by the reception means. Specifically, the starting device and the disabling device are respectively housed in separate casings, and the housing of the disabling device casing is recessed in the casing of the starting device. In a state in which the casing of the deactivating device is accommodated, the transmission means of the activation device and the reception means of the deactivation device face each other, and the reception means of the deactivation device receives the activation signal from the transmission means of the deactivation device. .

In the first anti-theft system,
The activation device is accommodated in, for example, a safe in the store, and the invalidation device is accommodated in the accommodation unit of the activation device when the store is closed. In this state, the transmission unit of the activation device and the reception unit of the invalidation device are opposed to each other, and the activation signal created by the activation signal creation unit of the activation device is transmitted from the transmission device of the activation device to the invalidation device. The signal is supplied to the start command generating means via the receiving means. The start command generating means issues a start command in response to the start signal, and the invalidation control means sets the invalidation signal generating means to the operation on mode in response to the start command. As a result, the invalidation signal generation means always generates the invalidation signal, or generates the invalidation signal in response to a user operation.

When the clerk removes the invalidating device from the housing of the activation device at the time of opening the store, the activation signal is no longer received by the receiving means, and the resetting means detects this and resets the variable generation means. Thereafter, when the variable generated by the variable generation means exceeds a predetermined threshold, the invalidation control means detects this, and sets the invalidation signal generation means to the operation off mode. As a result, the invalidation signal generating means
The generation of the invalidation signal is stopped, or the generation of the invalidation signal is forcibly stopped irrespective of a user operation for generating the invalidation signal.

[0014] More specifically, the transmission means of the activation device and the reception means of the invalidation device are constituted by a plurality of terminals that should contact each other.

In this specific configuration, when the invalidation device is accommodated in the accommodating portion of the activation device, the terminal of the activation device and the terminal of the invalidation device come into contact with each other. Thus, the activation signal created by the activation signal creation means of the activation device is supplied from the terminal of the activation device to the activation command generation means via the terminal of the invalidation device.

In another specific configuration, the transmission means of the activation device and the reception means of the nullification device are constituted by a magnetic signal or optical signal transmitter and receiver.

In this specific configuration, when the invalidating device is accommodated in the accommodating portion of the activation device, the transmitter of the activation device and the receiver of the invalidating device face each other. Thereby, the magnetic signal or the optical signal generated by the activation signal generation unit of the activation device is radiated from the transmitter of the activation device, input to the receiver of the nullification device, and transmitted to the activation command generation unit as the activation signal. Will be supplied.

In a second anti-theft system having a specific configuration, the invalidating device comprises data input means, and when the start data representing a specific code is input by the data input means, the invalidating device. The start command generating means issues a start command, while the reset means resets the variable generating means.

In the second anti-theft system,
The invalidation device is carried by a clerk. When the store clerk operates the data input means and inputs start data representing a specific code at the time of opening the store, the start command generating means issues a start command, and the invalidation control means receives the start command and generates an invalidation signal. Set the means to operation on mode. As a result, the invalidation signal generation means always generates the invalidation signal, or generates the invalidation signal in response to a user operation. The reset means resets the variable generation means when the start data is input. And when the variable generated from the variable generation means exceeds a predetermined threshold,
The invalidation control means detects this, and sets the invalidation signal generation means to the operation off mode. As a result, the invalidation signal generation means stops generation of the invalidation signal or forcibly stops generation of the invalidation signal regardless of a user operation for generating the invalidation signal.

In a specific configuration of the second anti-theft system, the invalidating device includes stop command generating means for issuing a stop command when stop data representing a specific code is input by the data input means. Upon receiving the stop command, the invalidation control means sets the invalidation signal generation means to the operation off mode.

In this specific configuration, when the store clerk operates the data input means and inputs the stop data, the stop command generation means issues a stop command, and the invalidation control means
In response to the stop command, the invalidation signal generator is set to the operation off mode. As a result, the invalidation signal generating means
The generation of the invalidation signal is forcibly stopped regardless of the value of the variable generated from the variable generation means. Therefore, it is effective, for example, when the closing time is advanced and the time from opening to closing is shortened.

In another specific configuration, the data input means is constituted by a key input device, and the start data can be easily input to the invalidation device by key operation.

The third anti-theft system having a specific configuration includes a key means, and in response to an ON operation using the key means, the activation instruction generating means of the invalidating device issues an activation instruction, while the resetting means transmits the activation instruction. Reset the variable generation means.

In the third anti-theft system,
The invalidation device is carried by a clerk. When the store clerk performs an on operation using the key means at the time of opening the store, the start command generation means issues a start command, and the invalidation control means sets the invalidation signal generation means to the operation on mode in response to the start command. I do. As a result, the invalidation signal generation means always generates the invalidation signal, or generates the invalidation signal in response to a user operation. The reset means resets the variable generation means when an ON operation is performed using the key means. Then, when the variable generated from the variable generation means exceeds a predetermined threshold, the invalidation control means detects this,
The invalidation signal generator is set to the operation off mode. As a result, the invalidation signal generation means stops generation of the invalidation signal or forcibly stops generation of the invalidation signal regardless of a user operation for generating the invalidation signal.

[0025]

According to the anti-theft system of the present invention, even if a customer or a temporary clerk steals the nullifying device from the store, the nullifying device keeps the nullifying device for a predetermined time after the variable generating means is reset. When the predetermined time elapses or when the invalidation signal is used a predetermined number of times, the generation of the invalidation signal is stopped. Therefore, the invalidation device cannot be used at another store, and the illegal use of the invalidation device is prevented. .

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below based on five examples. First Embodiment The anti-theft system of this embodiment comprises the same anti-theft gate (4) and alarm unit (3) as the conventional configuration shown in FIGS. 15 and 16, and the anti-theft gate (4) is sold. Store exit
(40) The alarm unit (3) is installed near the product (5) and displayed in the store. Alarm unit (3)
Can be set to switch between a set state and a reset state. In the set state, an alarm operation signal from the transmitting antenna of the anti-theft gate (4) is generated by turning off the alarm operation switch piece (32) or An alarm is issued when it is received.
2) Forcibly stop the generation of alarms when is off and when the alarm activation signal is received. Alarm unit (3)
Is switched from the set state to the reset state by receiving an invalidation signal from the invalidation device (1) described later.

The nullifying device (1) of this embodiment is to be carried by a store clerk, and has a circuit board (11) inside a casing (10) as shown in FIGS. I have. The disabling device (1) can set an operation-on mode and an operation-off mode. In the operation-on mode, the invalidation signal is constantly transmitted to the outside. Stop sending to. In contrast, the activation device
(2) is housed inside a safe in a store, for example, and has a circuit board (21) inside a casing (20). On the upper surface of the casing (20), a housing portion (25) for housing the casing (10) of the nullification device (1) is formed in a concave shape.

FIG. 3 shows the invalidating device (1) and the starting device (2).
2 shows the configuration of the circuit boards (11) and (21) respectively incorporated therein. The circuit board (11) of the nullification device (1) includes a pair of positive and negative connection terminals a and b, and these connection terminals a and b are connected to the control unit (14) via the signal receiving unit (13). Have been. Further, the circuit board (11) includes a disabling signal generating unit (15), and the disabling signal generating unit (15) is connected to the signal amplifying unit (17) via the mode switch (16), The signal amplifying section (17) is connected to a transmitting antenna (18) formed by connecting a capacitor C1 and a coil L1 in series. On the other hand, the circuit board (21) of the activation device (2) has a pair of positive and negative connection terminals a 'and b',
These connection terminals a 'and b' are connected to a start signal generator (23) via a signal amplifier (24).

As shown in FIG. 2, when the disabling device (1) is accommodated in the accommodating portion (25) of the activation device (2), a pair of positive and negative connection terminals a and b of the disabling device as shown in FIG. Are respectively connected to a pair of positive and negative connection terminals a ′ and b ′ of the activation device, and the activation signal generated from the activation signal generation unit (23) of the activation device is input to the signal amplification unit (24) and amplified. Thereafter, the signal is input to the signal receiving unit (13) via the connection terminals a 'and b' of the activation device and the connection terminals a and b of the nullification device. Here, as shown in FIG. 4, the start signal is constituted by a plurality of pulses having a constant peak value, one header portion having a long ON period T, and
And a plurality of code portions having a short ON period t.

The signal input to the signal receiving unit (13) in FIG. 3 is input to the control unit (14), and the control unit (14) determines whether the signal is a start signal. Here, the control unit (14)
When the signal input from the signal receiving section (13) is a start signal, the code data of the code section starts to be read following the reception of the header section shown in FIG. 4, and the input of the start signal is recognized based on the code data. Further, the control unit (14) performs time measurement, creates a switching signal for turning on / off the mode changeover switch (16) based on the time measurement result and the judgment result, and generates the mode changeover switch (16). ). As a result, the mode switch (16) is turned on / off.
It will be controlled off. Mode switch (16)
When is turned on, the invalidation signal generated from the invalidation signal generation unit (15) is input to the signal amplification unit (17) via the mode changeover switch (16), and after being amplified, is transmitted to the transmission antenna (18). It is supplied, converted to electromagnetic waves and transmitted to the outside. In this way, the invalidating device (1) is set to the operation on mode. On the other hand, when the mode switch (16) is turned off,
The supply of the invalidation signal from the invalidation signal generator (15) to the signal amplifier (17) is stopped. In this way, the nullification device
(1) is set to the operation off mode.

FIG. 5 shows a control procedure by the control unit (14). First, in step S1, the signal receiving unit (13)
It is determined whether or not any signal has been received from No., and if No, the determination in step S1 is repeated. On the other hand, if Yes is determined in step S1, a signal from the signal receiving unit (13) is transmitted to the activation device in step S2.
It is determined whether or not it is the start signal from (2). Here, when the invalidation device (1) is accommodated in the accommodation unit (25) of the activation device (2), it is determined as Yes, and the process proceeds to step S3.
Set the mode switch (16) to ON. As a result, the invalidating device (1) is set to the operation on mode. On the other hand, if No is determined in step S2, the process returns to step S1. Subsequently, in step S4, it is determined whether or not the activation signal is continuously received. Here, when the invalidating device (1) is removed from the storage section (25) of the activation device (2), it is determined as No, and the process proceeds to step S5. On the other hand, if Yes is determined in step S4, the determination in step S4 is repeated.

At step S5, a counter variable n is initialized, and then at step S6, the counter variable n is counted up. Then, in step S7, the signal receiving unit (1
It is determined whether any signal has been received from 3), and if it is determined No, the process proceeds to step S8. On the other hand, if it is determined Yes in step S7, the process proceeds to step S9.
The signal from the signal receiving unit (13) is transferred to the starting device (2).
It is determined whether or not it is a start signal from. Here, when the invalidating device (1) is accommodated in the accommodating portion (25) of the activation device (2), it is determined as Yes, and the process returns to step S4. on the other hand,
If No is determined in step S9, the process proceeds to step S9.
Move to 8.

In step S8, it is determined whether or not the counter variable n is equal to or greater than a predetermined value N (N ≧ 1). Here, the predetermined value N is set so that, for example, the elapsed time from when the value of the counter variable n is initialized to zero in Step S5 to when it becomes N is 8 hours. If it is determined Yes in step S8, the process proceeds to step S10, in which the mode change switch (16) is turned off, and then returns to step S1. As a result, the invalidating device (1) is set to the operation off mode. On the other hand, step S
If No is determined in step 8, the process returns to step S6.

In the anti-theft system, the store clerk activates the nullification device (1) when the store is closed and stores the invalidation device (1) in the housing (2) of the activation device (2).
Housed in 5). The disabling device (1) is a housing for the activation device (2)
When it is accommodated in (25), it is determined as Yes in step S2, and the mode change switch (16) is turned on in step S3. As a result, the invalidation device (1) is set to the operation-on mode, and always transmits the invalidation signal to the outside. Then, at the time of opening the store, the clerk takes out the invalidating device (1) from the storage section (25) of the activation device (2) in the safe and carries the invalidating device (1) at hand. When the disabling device (1) is removed from the storage unit (25) of the activation device (2) in this manner, No is determined in step S4, and the process proceeds to step S5, and time counting is started. The sales clerk uses a nullification device (1) at hand when selling products to customers legitimately.
Sends an invalidation signal to the alarm unit (3), sets the alarm unit (3) to the reset state where the buzzer (31) does not sound, removes the alarm unit (3) from the product, and delivers the product to the customer. Hand over.

When eight hours have passed since the opening of the store, it is determined to be Yes in step S8, and the mode switch 16 is set to off in step S10. As a result, the invalidating device (1) is set to the operation off mode, and stops transmitting the invalidating signal to the outside. After that, when the store clerk closes the store, the disabling device (1) activates the activation device (2)
Is returned to the storage section (25), the determination is Yes in step S2, and the invalidating device (1) is set to the operation-on mode again, and the invalidating signal is constantly transmitted to the outside.
If the clerk returns the invalidating device (1) to the storage section (25) of the activation device (2) before eight hours have passed since the opening of the store, it is determined Yes in step S9 and the process proceeds to step S4. Returning, after that, when the clerk removes the invalidating device (1) again from the storage section (25) of the activation device (2), it is determined as No in step S4, and the current time count is canceled, and Starts a new time count.

As described above, the nullifying device (1) of the present embodiment.
Is taken out of the accommodating section (25) of the activation device (2), and
When the time elapses, the operation is set to the operation off mode, and the transmission of the invalidation signal to the outside is stopped. Therefore, even if a customer or a temporary clerk steals the nullifying device (1) from the store, if eight hours have elapsed after the nullifying device (1) has been taken out of the storage section (25) of the activation device (2), another sales will be performed. Invalidation device at shop
(1) cannot be used, and unauthorized use of the nullification device (1) is prevented. Further, the nullification device (1) of the present embodiment
Once the disabling device (1) is returned to the housing (25) of the activation device (2) and taken out of the housing (25) of the activation device (2) again,
Since the transmission time of the invalidation signal to the outside is extended, it is effective when the closing time is delayed and the time from opening to closing is extended.

Second Embodiment FIG. 6 shows the structure of the circuit boards (71) and (26) built in the invalidating device and the starting device of the present embodiment, respectively. The circuit board (71) of the nullifying device of the present embodiment includes a receiving antenna (72),
Except for the signal amplifying unit (73) and the control unit (74), the first unit shown in FIG.
The configuration is the same as that of the circuit board (11) of the embodiment. The receiving antenna (72) is configured by connecting a capacitor C2 and a coil L2 in parallel, and is connected to a control unit (74) via a signal amplifying unit (73). On the other hand, the circuit board (26) of the starting device is shown in FIG.
The structure of the circuit board 21 of the first embodiment shown in FIG. 3 is the same as that of the first embodiment except for the transmitting antenna 27 as shown in FIG. Transmit antenna
(27) is configured by connecting a capacitor C and a coil L in series, and is connected to a signal amplifier (24).

In the nullifying device (1) according to the present embodiment, as shown in FIG. 2, the nullifying device (1) is provided in the housing of the starting device (2).
When accommodated in (25), as shown in FIG. 6, the receiving antenna (72) of the nullifying device (1) becomes the transmitting antenna (27) of the activation device (2).
Will be placed close to the. In this state, a high-frequency current is obtained as an original activation signal from the activation signal generation unit (23) of the activation device, and the high-frequency current is amplified by the signal amplification unit (24), and then the coil of the transmission antenna (27) is obtained. L. As a result, magnetic lines of force are generated from the coil L of the transmitting antenna (27), and the magnetic lines of force are generated by the receiving antenna (7
The coil L2 of the transmitting antenna (27) and the coil L2 of the receiving antenna (72) are electromagnetically coupled to each other through the coil L2 of 2). As a result, the receiving antenna (7
A high frequency current as shown in FIG. 7 is obtained from the coil L2 of 2). Here, the high-frequency current is constituted by a burst wave of a predetermined pattern, and has one header portion having a long ON period T and a plurality of code portions having a short ON period t.

The high-frequency current obtained in this way is shown in FIG.
As shown in (1), the signal is input to the signal amplifier (73) as a start signal, amplified, and then input to the controller (74). Control unit (7
4) determines whether or not the signal input from the signal amplifier (73) is a start signal. Here, when the signal input from the signal amplifying unit (73) is a start signal, the control unit (74)
Following the reception of the header section shown in (1), the code data of the code section starts to be read, and the input of the activation signal is recognized based on the code data. Then, the control unit (74) turns on / off the mode changeover switch (16) based on the time measurement result and the above determination result.
A switching signal for turning off is created and sent to the mode switch (16). As a result, the mode changeover switch (16) is turned on / off.

As described above, the invalidating device of this embodiment is
As in the first embodiment, as shown in FIG.
Is set in the operation-on mode, the invalidation signal is transmitted to the outside, and taken out of the housing section (25) of the activation device (2) for a predetermined time, for example, 8 hours. Is passed, the operation is set to the operation off mode, and the transmission of the invalidation signal to the outside is stopped.

Third Embodiment The nullifying device (9) of this embodiment is to be carried by a clerk, and has a plurality of operation keys (92) on the surface of a casing (90) as shown in FIG. Are arranged, and code data can be input by the operation keys (92). A circuit board (not shown) is incorporated in the casing (90). In the operation on mode, the invalidation device (9) constantly transmits the invalidation signal to the outside, while in the operation off mode, the invalidation device (9) transmits the invalidation signal to the outside in the operation off mode. Stop.

FIG. 9 shows the structure of a circuit board (91) built in the invalidating device (9). The circuit board (91) includes a data input section (93) and a control section (94). Except for this, it is the same as the circuit board (11) of the nullification device (1) of the first embodiment shown in FIG. When the operation key (92) is operated, code data corresponding to the key operation is input to the data input unit (93), and the code data is input to the control unit (94). In the control unit (94), for example, predetermined on-code data and off-code data each consisting of three digits are registered.
Is the code data input from the data input unit (93),
It is determined whether or not the data matches the on-code data and further whether or not the data matches the off-code data. And the control unit (94)
Creates a switching signal for turning on / off the mode changeover switch (16) based on the time measurement result and the above judgment result, and sends out the signal to the mode changeover switch (16).
As a result, the mode changeover switch (16) is turned on / off.

FIG. 10 shows a control procedure by the control section (94). First, in step S11, it is determined whether or not any code data has been received from the data input unit (93). If the determination is No, the determination in step S11 is repeated. On the other hand, if Yes is determined in step S11, the process proceeds to step S12 and the data input unit
It is determined whether or not the code data from (93) matches with the on-code data.
Return to 11. If it is determined Yes in step S12, the process proceeds to step S13 and the mode switch
Set (16) to ON. As a result, the nullification device (9)
It will be set to the operation on mode.

After the counter variable n is initialized in step S14, the counter variable n is initialized in step S15.
Count up. Subsequently, in step S16, it is determined whether or not any code data has been received from the data input unit (93).
Move to On the other hand, if Yes is determined in step S16, the process proceeds to step S18, where the data input unit
It is determined whether or not the code data from (93) matches the on-code. If the determination is Yes, the process proceeds to step S14.
Return to If No is determined in step S18,
The process shifts to step S19 to determine whether or not the code data from the data input unit (93) matches the off code.
If it is determined to be o, the process proceeds to step S17,
When the determination is Yes, the process proceeds to step S20.

In step S17, the counter variable n is
It is determined whether or not it is equal to or greater than a predetermined value N (N ≧ 1). Here, the predetermined value N is set so that, for example, the elapsed time from when the value of the counter variable n is initialized to zero in Step S14 to when it becomes N is 8 hours. If No is determined in step S17, step S1
Returning to step S5, if the determination is Yes, step S
Move to 20. In step S20, after the mode change switch (16) is set to off, the process returns to step S11. As a result, the invalidating device (9) is set to the operation off mode.

In the anti-theft system, the store clerk operates the operation key (92) at the time of opening the store, and inputs the same code data as the on-code data. By performing this operation, Yes is determined in step S12, and the mode switch (16) is set to on in step S13. As a result, the invalidating device 9 is set to the operation-on mode, and always transmits the invalidating signal to the outside. Also, time counting is started. The clerk
When selling products to customers legitimately, an invalidation signal is sent from the invalidation device (9) at hand to the alarm unit (3), and the alarm unit (3) is reset so that the buzzer (31) does not sound. After setting the state, remove the alarm unit (3) from the product and hand the product to the customer.

If eight hours have passed since the opening of the store, it is determined to be Yes in step S17, and the mode switch (16) is set to off in step S20. Thereby, the nullification device (9) is set to the operation off mode,
The transmission of the invalidation signal to the outside is stopped. still,
Before 8 hours have passed since the store opened, the store clerk operates the operation key (92).
Is operated to input the same code data as the on-code data, the result of the determination in step S18 is Yes, and the process returns to step S14, where the current time count is canceled and a new time count is started from that time. You. If the clerk operates the operation key (92) and inputs the same code data as the off code before eight hours have passed since the store was opened, it is determined as Yes in step S19 and the process proceeds to step S20. , Mode selector switch (16)
Is set to off. This allows the nullification device (9) to:
The operation is set to the operation off mode, and the transmission of the invalidation signal to the outside is stopped.

The invalidating device of this embodiment is set to the operation-off mode, regardless of the input time of the on-code data, by inputting the same code data as the off-code data using the operation key (92). Since the transmission of the conversion signal to the outside is stopped, this is effective when the closing time is advanced and the time from opening to closing is shorter than 8 hours.

Fourth Embodiment The anti-theft system of this embodiment is similar to the first embodiment,
It has an activation device (2) and a disabling device, and the configuration of the activation device (2) is the same as that of the first embodiment shown in FIGS. 1 and 3, and a description thereof will be omitted. The disabling device of this embodiment includes a signal output switch (62) to be operated when the disabling signal is sent to the alarm unit (3) to set the alarm unit (3) to the reset state as shown in FIG. The disabling device can set an operation-on mode and an operation-off mode. In the operation-on mode, the signal output switch (62) is set to on to transmit an invalidation signal to the outside. However, in the operation off mode, the transmission of the invalidation signal to the outside is forcibly stopped while the signal output switch (62) is off. The invalidating device of the present embodiment includes a control unit (63) having a function different from that of the first embodiment. Except for the control unit (63) and the signal output switch (62), other configurations are the same as those of FIG. And is the same as the first embodiment shown in FIG.

As shown in FIG. 11, the control unit (63) of this embodiment counts the number of times the signal output switch (62) is set to ON, and inputs the count result and the input from the signal receiving unit (13). A switching signal for turning on / off the mode changeover switch (16) is created based on the result of the determination as to whether or not the input signal is a start signal, and the mode changeover switch (1
Send to 6). When the signal output switch (62) is set to ON by the user while the mode change switch (16) is on, the invalidation signal generated from the invalidation signal generator (15) is output to the mode change switch (16). After being input to the signal amplifying unit (17) and amplified, the signal is supplied to the transmission antenna (18), converted into an electromagnetic wave, and transmitted to the outside. In this way, the invalidating device is set to the operation on mode. on the other hand,
When the mode switch (16) is off, the invalidation signal generator (15) regardless of the state of the signal output switch (62).
, The supply of the invalidation signal to the signal amplifying unit (17) is stopped. In this way, the nullification device is set to the operation off mode.

FIG. 12 shows a control procedure by the control section (63). First, in step S21, the signal receiving unit
Determine whether any signal has been received from (13), and
Is determined, the determination in step S21 is repeated. On the other hand, when it is determined Yes in step S21, the process proceeds to step S22, and it is determined whether the signal from the signal receiving unit (13) is the activation signal from the activation device (2), and Yes is determined. If it is determined that it is, the process proceeds to step S23, and the mode change switch (16) is set to ON. As a result, the invalidating device is set to the operation on mode.
On the other hand, if No is determined in step S22, the process returns to step S21.

Next, in step S24, it is determined whether or not the activation signal is continuously received. If the determination is Yes, the determination in step S24 is repeated. On the other hand, if No is determined in step S24, step S2
After proceeding to 5 to initialize the counter variable n, it is determined in a step S26 whether or not the signal output switch (62) is on. Here, if the clerk turns on the signal output switch (62) in order to send a disabling signal from the disabling device to the alarm unit (3) and set the alarm unit (3) to the reset state, it is determined as Yes. Then, the process proceeds to step S27 to count up the counter variable n. Subsequently, in step S28, it is determined whether or not the counter variable n is equal to or greater than a predetermined value N (N ≧ 1). Here, the predetermined value N is set according to the frequency of use of the invalidation device. For example, in a store that uses the invalidation device about 25 times a day, the predetermined value N is set to a value slightly larger than 25, for example, 30. Is done. If Yes is determined in the step S28, the process shifts to the step S31 and the mode switch (1
After setting 6) to OFF, the process returns to step S21. As a result, the invalidating device is set to the operation off mode. On the other hand, if No is determined in step S28, the process returns to step S27.

If the determination in step S26 is No, the process proceeds to step S29, where the signal receiving unit (13)
It is determined whether or not any signal has been received from the server. If the determination is No, the process returns to step S26. If the determination is Yes, the process proceeds to step S30 and the signal from the signal receiving unit (13). It is determined whether the signal is an activation signal from the activation device (2). If No is determined in step S30, the process returns to step S26. If Yes is determined, the process returns to step S24.

In the anti-theft system, the clerk stores the nullification device in the storage portion (25) of the activation device (2) when the store is closed. When the disabling device is accommodated in the accommodation unit (25) of the activation device (2), it is determined as Yes in step S22,
In step S23, the mode change switch (16) is set to ON. As a result, the invalidation device is set to the operation-on mode, and the signal output switch (62) is set to the on state, whereby the invalidation signal can be transmitted to the outside. And the clerk, when opening, the activation device
The invalidating device is taken out of the storage section (25) of (2), and the invalidating device is kept at hand. In this way, the invalidation device is the activation device
When it is taken out of the storage section of (2), No is determined in step S24, and the process proceeds to step S25, and the number of times the clerk has set the signal output switch (62) to ON from that point is counted.

When the store clerk sells the product to the customer properly, the clerk sets the signal output switch (62) of the invalidation device at hand to ON, and invalidates the invalidation device to the alarm unit (3). After the signal is sent, the alarm unit (3) is set to the reset state, the alarm unit (3) is removed from the product, and the product is handed to the customer. In this way, the number of times the clerk turns on the signal output switch (62) and uses the invalidating device is counted, and when the number reaches 30 times, the process proceeds to step S2.
It is determined as Yes at 8 and the mode switch 16 is turned off at step S31. Accordingly, the invalidating device is set to the operation off mode, and forcibly stops transmission of the invalidating signal to the outside regardless of the state of the signal output switch (62). In addition, the clerk installed 3 invalidating devices.
If the disabling device is returned to the accommodating portion (25) of the activation device (2) before it is used 0 or more times, the determination is Yes in step S30 and the process returns to step S24. When the device is taken out of the housing (25) of the activation device (2),
If No is determined in step S24, the count of the number of times that the clerk has set the signal output switch (62) to ON is canceled up to the present, and the count of the number of times is newly started from that time.

The disabling device of this embodiment is taken out of the accommodating portion (25) of the activation device (2), and when used 30 times, is set to the operation off mode and the signal output switch (62) is turned off. Regardless of the state, the transmission of the invalidation signal to the outside is forcibly stopped. Therefore, even if a customer or a temporary clerk steals the invalidation device from the store, if the device is taken out of the storage unit (25) of the activation device (2) and used 30 times, then,
Even if the signal output switch (62) is set to ON, the invalidation signal is not transmitted to the outside and cannot be used. or,
The invalidating device according to the present embodiment is configured such that the invalidating device is
Return to the storage section (25) of (2), and again the storage section of the activation device (2)
Taking it out from (25) increases the number of times the invalidation device can be used, which is effective when the number of customers is large and the sales volume of the product is large.

Fifth Embodiment The nullification device of this embodiment has a control unit having a function different from that of the fourth embodiment, and the other components except the control unit are the same as those of the fourth embodiment shown in FIG. The description is omitted because it is the same as the example. FIG. 13 shows a control procedure by the control unit of the present embodiment. First, in step S41, it is determined whether any signal has been received from the signal receiving unit (13),
If the determination is No, the determination in step S41 is repeated. If it is determined Yes in step S41,
The process shifts to step S42 to determine whether or not the signal from the signal receiving unit (13) is an activation signal from the activation device (2),
If the determination is Yes, the process moves to step S43, and the mode switch (16) is turned on. As a result, the invalidating device is set to the operation on mode. On the other hand, if No is determined in step S42, the process returns to step S41. Next, in step S44, it is determined whether or not the activation signal is continuously received. If the determination is Yes, the determination in step S44 is repeated.
If No is determined, the process proceeds to step S45.
Initialize the counter variable n. The processing up to this point is exactly the same as in the fourth embodiment.

Subsequently, in step S46, it is determined whether or not the signal output switch (62) is ON. If the determination is YES, the process proceeds to step S47, where the counter variable n is counted up by x. Thereafter, the process proceeds to step S50. Here, x is, for example, 1 when the signal output switch (62) is 1
Times from the nullifying device by being set to on
When the invalidation signal is transmitted to the outside for the second, the value is set to 10. On the other hand, if No is determined in step S46, the process proceeds to step S48, and the counter variable n
Is incremented by one, and the process proceeds to step S49 to determine whether or not any signal has been received from the signal receiving unit (13). If No, the process proceeds to step S50.
Move to If it is determined Yes in step S49, the process proceeds to step S51 to determine whether the signal from the signal receiving unit (13) is a start signal from the starter (2), and determines Yes. If so, the process returns to step S44, whereas if No, the process proceeds to step S50.

In step S50, the counter variable n is
It is determined whether or not it is equal to or greater than a predetermined value N (N ≧ 1). If the determination is No, the process returns to step S46. Here, No is determined in step S50, and No is determined in step S46, and step S46 is determined.
When the processing of steps S50 to S50 is repeated, the count-up of step S48 is performed at intervals of one second, and the predetermined value N of step S50 depends on the frequency of use of the invalidating device and the time from opening to closing. Set to value. If it is determined Yes in step S50, the process proceeds to step S52, in which the mode switch (16) is set to off, and the process returns to step S41. As a result, the invalidating device is set to the operation off mode. As the frequency of use of the invalidating device of this embodiment increases, the usable time becomes shorter.

The configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims. For example, in the above embodiment, when the invalidation device is housed in the housing unit (25) of the activation device (2),
Alternatively, when the same code data as the on-code data is input by operating the operation key (92), the mode changeover switch (16) is turned on. Instead of these structures, FIG. As shown in the figure, a keyhole (81) is opened in the casing (80) of the nullification device (8), and the clerk operates the keyhole (81).
It is also possible to adopt a configuration in which when a predetermined key (82) is engaged to perform an ON operation, the mode changeover switch (16) is turned ON.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an appearance of a nullification device according to a first embodiment.

FIG. 2 is a perspective view illustrating a state in which the nullification device is housed in a housing portion of the activation device.

FIG. 3 is a block diagram illustrating a configuration of a circuit board included in each of the activation device and the invalidation device according to the first embodiment.

FIG. 4 is a waveform chart showing a start signal in the first embodiment.

FIG. 5 is a flowchart showing a control procedure by a control unit of the invalidation device.

FIG. 6 is a block diagram illustrating a configuration of a circuit board incorporated in each of the activation device and the invalidation device according to the second embodiment.

FIG. 7 is a waveform chart showing a start signal in the second embodiment.

FIG. 8 is a perspective view illustrating an appearance of a nullification device according to a third embodiment.

FIG. 9 is a block diagram illustrating a configuration of a circuit board built in the nullification device.

FIG. 10 is a flowchart showing a control procedure by a control unit of the invalidating device.

FIG. 11 is a block diagram illustrating a configuration of a circuit board included in each of a starting device and a disabling device according to a fourth embodiment.

FIG. 12 is a flowchart showing a control procedure by a control unit of the invalidating device.

FIG. 13 is a flowchart illustrating a control procedure performed by a control unit of the invalidating device according to the fifth embodiment.

FIG. 14 is a perspective view illustrating an appearance of a nullification device according to another embodiment.

FIG. 15 is a perspective view showing an anti-theft gate installed near an outlet of a store.

FIG. 16 is a perspective view illustrating an appearance of an alarm unit.

[Explanation of symbols]

 (1) Disabling device (14) Control unit (16) Mode changeover switch (2) Starting device (3) Alarm unit (31) Buzzer (32) Alarm operation switch piece (4) Anti-theft gate

Claims (9)

[Claims] 1. An alarm unit to be coupled to an object to be stolen, and an invalidating device for transmitting an invalidating signal to the alarm unit, wherein the alarm unit is capable of generating an alarm. And detecting means for detecting that the connection state with the anti-theft object has been disconnected and generating a detection signal, and operating the alarm means in response to the detection signal, and outputting an invalidating signal from the invalidating device. When received,
Alarm control means for invalidating the subsequent detection signal,
The invalidation device includes: an invalidation signal generation unit that constantly generates an invalidation signal in the operation on mode or generates an invalidation signal in response to a user operation; and a start command generation unit that issues a start instruction in response to a user operation. Variable generation means for generating a variable that increases in accordance with the passage of time or the number of user operations for generating the invalidation signal; reset means for resetting the variable generation means in response to the user operation; And setting the invalidation signal generation means to the operation on mode while setting the invalidation signal generation means to the operation off mode when a variable generated from the variable generation means exceeds a predetermined threshold. Anti-theft system equipped. 2. An activation device for transmitting an activation signal to an invalidating device, wherein the activation device invalidates the activation signal generated by the activation signal generation device for generating an activation signal and the activation signal generated by the activation signal generation device. Transmission means for transmitting the activation signal to the activation device, the invalidation device comprises reception means capable of receiving an activation signal from the transmission means of the activation device by a user operation, and the activation command generation means activates the activation command from the reception means. 2. The anti-theft system according to claim 1, wherein a start command is issued in response to the signal, and the reset unit resets the variable generation unit when the start signal is no longer received by the receiving unit. 3. The activation device and the disabling device are respectively housed in separate casings. The casing of the activation device is provided with a recess for accommodating the casing of the disabling device. In a state in which the casing of the deactivating device is accommodated, the transmission means of the activation device and the reception means of the deactivation device face each other, and the reception means of the deactivation device receives the activation signal from the transmission means of the deactivation device. Claim 2
Anti-theft system described in. 4. The anti-theft system according to claim 3, wherein the transmission means of the activation device and the reception means of the nullification device are constituted by a plurality of terminals that should contact each other. 5. The anti-theft system according to claim 3, wherein the transmitting means of the activating device and the receiving means of the nullifying device comprise a magnetic signal or optical signal transmitter and receiver. 6. The invalidating device includes data input means. When start data representing a specific code is input by the data input means, the activation command generating means of the invalidating device issues a start command, 2. The anti-theft system according to claim 1, wherein the reset unit resets the variable generation unit. 7. The invalidation device includes stop command generation means for issuing a stop command when stop data representing a specific code is input by data input means, and the invalidation control means receives the stop command. 7. The anti-theft system according to claim 6, wherein the invalidation signal generating means is set to an operation off mode. 8. The anti-theft system according to claim 6, wherein the data input means is constituted by a key input device. 9. The invalidating device includes a key unit, and in response to an ON operation using the key unit, the activation command generating unit of the invalidating device issues a starting command, while the reset unit resets the variable generating unit. The anti-theft system according to claim 1.