JP3485803B2 - Anti-theft system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antitheft system for protecting goods displayed in a store from illegal acts such as shoplifting, and in particular, an invalidation capable of forcibly stopping the alarm generation of an alarm unit. The present invention relates to an anti-theft system including a device.

[0002]

2. Description of the Related Art Conventionally, a store which displays and sells products such as compact disk cassettes and magnetic tape cassettes has an anti-theft system as shown in FIG. 15 in order to protect these products from illegal acts such as shoplifting. It is adopted. The anti-theft system is composed of an anti-theft gate (4) installed near the outlet (40) of the store and an alarm unit (3) attached to the product (5). The anti-theft gate (4) has a circuit board (41) and a transmission antenna (not shown) built therein, and the circuit board (41) is a transmission circuit (not shown) for generating an alarm activation signal for the alarm unit (3). It is equipped with

The alarm unit (3) is, as shown in FIG.
The casing (30) includes a buzzer (31), a circuit board (33), a battery (not shown), and the like, and a plurality of sound emission holes (34) are formed on the surface of the casing (30). The alarm activation switch piece (32) is projected. Buzzer (31), circuit board (33)
The operation is controlled by the product and the alarm unit
It sounds when (3) is removed or when the alarm unit (3) passes through the anti-theft gate (4). At the store, the merchandise is displayed on a display stand with the alarm unit (3) attached. When a store clerk sells a product to a customer, a buzzer (31) is sent by a specific signal from a disabling device (not shown) to the circuit board (33) of the alarm unit (3).
After the alarm is turned off, the alarm unit (3) is removed from the product and the product is handed to the customer in exchange for the price.

The customer illegally changes the product (5) from the alarm unit (3)
When the alarm is removed, the alarm activation switch piece (32) is turned off, and the buzzer (31) sounds. Moreover, when the customer illegally tries to take the product (5) out of the store together with the alarm unit (3), the circuit board (33) of the alarm unit (3) is erroneously removed from the transmission antenna of the anti-theft gate (4). Upon receiving the alarm activation signal, the buzzer (31) will sound.

[0005]

However, in the above-mentioned theft prevention system, there is a risk that the invalidation device will be stolen from the store by a customer or a temporarily hired store clerk. Since the alarm unit (3) can be removed from the product after setting the alarm unit (3) so that it does not sound by improperly using the invalidation device at the store, it can be removed at other stores. There is a problem that products are 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 revocation device.

[0006]

The antitheft system according to the present invention comprises an alarm unit to be combined with an antitheft object, and a disabling device for transmitting a disabling signal to the alarm unit. The alarm unit includes an alarm means capable of issuing an alarm, a detecting means for detecting the disconnection of the connection state with the antitheft object and generating a detection signal, and an alarm means for receiving the detection signal. And an alarm control means for disabling the subsequent detection signal when the disabling signal is received from the disabling device. On the other hand, the disabling device includes an disabling signal generating means for constantly generating a disabling signal in the operation-on mode or for generating a disabling signal according to a user operation, and a start command generating for issuing a start command according to a user operation. Means, 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 user operation, An invalidation control that sets the invalidation signal generation means to the operation-on mode while receiving the start command, and sets the invalidation signal generation means to the operation-off mode when the variable generated from the variable generation means exceeds a predetermined threshold value. And means.

When the above antitheft system is implemented in, for example, a product store, the antitheft product is displayed on a display stand in combination with an alarm unit.
When the customer improperly disconnects the connection state between the product taken out of the display stand and the alarm unit, the detection unit generates a detection signal, and the alarm control unit of the alarm unit operates the alarm unit in response to the detection signal. As a result, an alarm is issued from the alarm means, and the fraudulent activity is notified to the surroundings.

On the other hand, the invalidation device is held by the clerk at least from the time of opening the store to the time of closing it. When the store clerk performs an operation for generating a start command in the start command generation means, the start command generation means issues a start command in response to the operation, and the invalidation control means receives the start command and invalidates the start command. The activation signal generating means is set to the operation on mode. With this, the invalidation signal generating means always generates the invalidation signal,
Alternatively, the invalidation signal is generated according to the user operation. When the store clerk performs an operation for resetting the variable generating means when the store is opened, the reset means resets the variable generating means and initializes the variable of the variable generating means to zero.

[0009] When the customer hands over the product and the alarm unit to the store clerk in a coupled state, and the store clerk sends an invalidation signal from the invalidation device to the alarm unit, the alarm control means receives the invalidation signal, The subsequent detection signal is invalidated. As a result, the alarm unit will forcibly stop issuing the alarm regardless of the input of the detection signal. In this way
The store clerk sets the alarm unit to a state where the alarm is forcibly stopped, disconnects the connected state of the product and the alarm unit, and hands the product to the customer.

After that, when the variable generated from 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 value is set to the 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 generating means generates a variable that increases in accordance with the number of user operations for generating the invalidation signal, the predetermined threshold value is set to a value according 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 the 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, regardless of the user operation for stopping the generation of the invalidation signal or generating the invalidation signal,
Forcibly stop the generation of the invalidation signal. Therefore, even if a customer or a temporary staff member steals the invalidation device and does not use the invalidation device at another store, the invalidation device does not generate the invalidation signal, and the invalidation device is Lose its effect.

The first antitheft system having a specific configuration further comprises an activation device for transmitting an activation signal to the disabling device, the activation device including activation signal generating means for generating the activation signal. And a transmitting unit that transmits the activation signal created by the activation signal creating unit to the invalidation device, the invalidation device being capable of receiving the activation signal from the transmission unit of the activation device by a user operation. The activation command generation means receives the activation signal from the reception means and issues the activation command, and the reset means resets the variable generation means when the activation signal is not received by the reception means. Specifically, the starting device and the disabling device are respectively housed in separate casings, and the housing portion of the disabling device casing is recessed in the casing of the starting device to disable the housing portion of the starting device casing. With the casing of the deactivating device accommodated, the transmitting means of the activating device and the receiving means of the deactivating device face each other, and the receiving means of the deactivating device receives the activating signal from the transmitting means of the activating device. .

In the first anti-theft system,
The starting device is housed in, for example, a safe in the store, and the invalidation device is housed in the housing portion of the starting device when the store is closed. In this state, the transmission means of the activation device and the reception means of the deactivation device face each other, and the activation signal generated by the activation signal generation means of the activation device is transmitted from the transmission means of the activation device to the deactivation device. It is supplied to the start command generating means via the receiving means. The start command generation means receives the start signal and issues a start command, and the invalidation control means receives the start command and sets the invalidation signal generation means to the operation-on mode. As a result, the invalidation signal generating means always generates the invalidation signal or generates the invalidation signal in response to the user operation.

When the store clerk removes the disabling device from the accommodating portion of the activating device when the store is opened, the receiving means no longer receives the activating signal, and the resetting means detects this and resets the variable generating means. After that, when the variable generated from 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. 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 regardless of the user operation for generating the invalidation signal.

More specifically, the transmitting means of the activating device and the receiving means of the disabling device are composed of a plurality of terminals that should be in contact with each other.

In the concrete structure, when the disabling device is accommodated in the accommodating portion of the activating device, the terminals of the activating device and the terminals of the disabling device come into contact with each other. As a result, the activation signal generated by the activation signal generation 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 transmitting means of the activating device and the receiving means of the disabling device are constituted by a magnetic signal or optical signal transmitter and a receiver.

In the specific configuration, when the disabling device is accommodated in the accommodating portion of the activating device, the transmitter of the activating device and the receiver of the disabling device face each other. Thereby, the magnetic signal or the optical signal created by the starting signal creating means of the starting device is radiated from the transmitter of the starting device and input to the receiver of the nullifying device, and is sent to the starting command generating means as the starting signal. Will be supplied.

In the second anti-theft system having a specific structure, the invalidation device includes data input means, and when the data input means inputs start data representing a specific code, the invalidation device. The starting command generating means of (1) issues a starting command, while the resetting means resets the variable generating means.

In the second antitheft system,
The invalidation device is carried by the clerk. When the store clerk operates the data input means to input start data representing a specific code when the store is opened, the start command generation 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 generating means always generates the invalidation signal or generates the invalidation signal in response to the user operation. Further, the reset means resets the variable generating means when the start data is input. Then, when the variable generated from the variable generating means exceeds a predetermined threshold value,
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 the generation of the invalidation signal or forcibly stops the generation of the invalidation signal regardless of the user operation for generating the invalidation signal.

In the specific configuration of the second antitheft 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. The invalidation control means receives the stop command and sets the invalidation signal generation means to the operation off mode.

In the concrete structure, when the clerk operates the data input means to input the stop data, the stop command generation means issues a stop command and the invalidation control means
Upon receiving the stop command, the invalidation signal generating means is set to the operation off mode. As a result, the invalidation signal generating means
Regardless of the value of the variable generated by the variable generating means, the generation of the invalidation signal is forcibly stopped. Therefore, it is effective, for example, when the closing time is advanced and the time from the opening time to the closing time is shortened.

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

A third antitheft system having a specific structure comprises a key means, and the activation command generation means of the disabling device issues a activation command in response to an ON operation using the key means, while the reset means is Reset the variable generator.

In the above-mentioned third antitheft system,
The invalidation device is carried by the clerk. When the store clerk performs an ON operation using the key means when the store is opened, 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. To do. As a result, the invalidation signal generating means always generates the invalidation signal or generates the invalidation signal in response to the user operation. Further, the reset means resets the variable generating means when an ON operation using the key means is performed. Then, when the variable generated from the variable generation means exceeds a predetermined threshold value, the invalidation control means detects this,
The invalidation signal generating means is set to the operation off mode. As a result, the invalidation signal generation means stops the generation of the invalidation signal or forcibly stops the generation of the invalidation signal regardless of the user operation for generating the invalidation signal.

[0025]

According to the anti-theft system of the present invention, even if a customer, a temporary clerk, or the like steals the invalidation device from the store, the invalidation device has a predetermined time after the variable generating means is reset. After a certain period of time has passed or when the invalidation device has been used for a predetermined number of times, the invalidation signal is stopped from being generated, so that the invalidation device cannot be used at other stores, and the unauthorized use of the invalidation device is prevented. .

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below based on five examples. First Embodiment The anti-theft system of the present embodiment comprises an anti-theft gate (4) and an alarm unit (3) which are the same as the conventional configuration shown in FIGS. 15 and 16, and the anti-theft gate (4) is sold. Store exit
The alarm unit (3) is installed near the (40) and is attached to the product (5) and displayed in the store. Alarm unit (3)
Can be switched between the set state and the reset state. In the set state, the alarm activation switch piece (32) is turned off or the alarm activation signal from the transmission antenna of the anti-theft gate (4) is transmitted. An alarm will be issued by receiving it, but in the reset state, the alarm activation switch piece (3
Forcibly stop the alarm generation while 2) is off and the alarm activation signal is being received. Alarm unit (3)
Receives a disabling signal from the disabling device (1) described later, and switches from the set state to the reset state.

The disabling device (1) of this embodiment is carried by a store clerk and has a circuit board (11) inside a casing (10) as shown in FIGS. There is. The disabling device (1) can set an operation on mode and an operation off mode. In the operation on mode, the disabling signal is always transmitted to the outside, while in the operation off mode, the disabling signal is output from the outside. To stop sending to. In contrast, the starter
(2) is housed, for example, inside a safe in a store, and has a circuit board (21) inside a casing (20). Further, a housing portion (25) for housing the casing (10) of the nullification device (1) is recessed on the upper surface of the casing (20).

FIG. 3 shows the disabling device (1) and the starting device (2).
The structure of the circuit boards (11) and (21) respectively incorporated in the above is shown. The circuit board (11) of the disabling device (1) comprises a pair of positive and negative connection terminals a and b, and these connection terminals a and b are connected to the control section (14) via the signal receiving section (13). Has been done. In addition, the circuit board (11) comprises an invalidation signal generation unit (15), the invalidation signal generation unit (15) is connected to the signal amplification unit (17) via the mode changeover switch (16), The signal amplification section (17) is connected to a transmission antenna (18) formed by connecting a capacitor C1 and a coil L1 in series. On the other hand, the circuit board (21) of the starting device (2) includes a pair of positive and negative connection terminals a'and b ',
These connection terminals a'and b'are connected to the activation signal generator (23) via the signal amplifier (24).

As shown in FIG. 2, when the nullifying device (1) is housed in the housing portion (25) of the starting device (2), a pair of positive and negative connecting terminals a and b of the nullifying device are shown in FIG. Are respectively connected to a pair of positive and negative connection terminals a'and b'of the starting device, and the starting signal generated from the starting signal generating part (23) of the starting device is input to the signal amplifying part (24) and amplified. After that, the signal is input to the signal receiving unit (13) via the connection terminals a ′ and b ′ of the starting device and the connection terminals a and b of the disabling device. Here, the activation signal is composed of a plurality of pulses having a constant peak value as shown in FIG.
And a plurality of code parts having a short ON period t.

The signal input to the signal receiving unit (13) of FIG. 3 is input to the control unit (14), and the control unit (14) determines whether or not the signal is a start signal. Here, the control unit (14)
When the signal input from the signal receiving section (13) is the activation signal, the code data of the code section is started to be read after the reception of the header section shown in FIG. 4, and the input of the activation signal is recognized by the code data. Further, the control unit (14) measures time, creates a switching signal for turning on / off the mode changeover switch (16) based on the time measurement result and the judgment result, and the mode changeover switch (16) ). This turns on / off the mode switch (16).
It will be off controlled. Mode selector switch (16)
When 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), amplified, and then transmitted to the transmission antenna (18). It is supplied, converted into electromagnetic waves and transmitted to the outside. In this way, the nullification 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 generation unit (15) to the signal amplification unit (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 is received, and if No, the determination in step S1 is repeated. On the other hand, if Yes is determined in step S1, the signal from the signal receiving unit (13) is output to the activation device in step S2.
It is determined whether or not it is the activation signal from (2). Here, when the nullification device (1) is housed in the housing part (25) of the activation device (2), it is determined as Yes, and the process proceeds to step S3,
Set the mode selector switch (16) to ON. As a result, the nullification 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. Succeedingly, in a step S4, it is determined whether or not the activation signal is continuously received. Here, when the disabling device (1) is taken out from the accommodating portion (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.

In step S5, the counter variable n is initialized, and subsequently in step S6, the counter variable n is counted up. Then, in step S7, the signal receiving unit (1
It is determined whether or not any signal is received from 3), and if No is determined, the process proceeds to step S8. On the other hand, if Yes is determined in step S7, step S9
Then, the signal from the signal receiver (13) is transferred to the starter (2).
It is determined whether or not it is a start signal from. Here, when the nullification device (1) is housed in the housing part (25) of the activation device (2), it is determined as Yes, and the process returns to step S4. on the other hand,
If No in step S9, step S
Go to 8.

In step S8, it is determined whether or not the counter variable n is equal to or greater than a preset predetermined value N (N ≧ 1). Here, the predetermined value N is set, for example, so that the elapsed time from when the value of the counter variable n is initialized to zero in step S5 until it becomes N is 8 hours. If YES is determined in step S8, the process proceeds to step S10 to turn off the mode changeover switch (16), and then the process returns to step S1. As a result, the nullification 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 operates the deactivating device (1) at the time of closing the storage device (2) of the starting device (2).
Store in 5). The deactivating device (1) is a housing part of the starting device (2).
When it is accommodated in (25), it is determined Yes in step S2, and the mode change-over switch (16) is turned on in step S3. As a result, the disabling device (1) is set to the operation-on mode and constantly sends the disabling signal to the outside. When the store is opened, the clerk takes out the invalidation device (1) from the accommodating portion (25) of the activation device (2) in the safe and holds the invalidation device (1) at hand. In this way, when the invalidation device (1) is taken out from the accommodation section (25) of the activation device (2), it is determined as No in step S4, the process proceeds to step S5, and time counting is started. The store clerk has the invalidation device (1) he / she has at the time of legally selling the product to the customer.
Sends an invalidation signal to the alarm unit (3) to set the alarm unit (3) to a reset state where the buzzer (31) does not sound, then remove the alarm unit (3) from the product, and deliver the product to the customer. Hand over.

When 8 hours have elapsed from the time of opening the store, it is determined Yes in step S8, and the mode changeover switch (16) is turned off in step S10. As a result, the invalidation device (1) is set to the operation-off mode and stops the transmission of the invalidation signal to the outside. After that, when the store clerk closes the store, the disabling device (1) starts the activation device (2).
When it is returned to the accommodating portion (25) of No. 2, it is determined Yes in step S2, the invalidation device (1) is set to the operation-on mode again, and the invalidation signal is always transmitted to the outside.
If the clerk returns the disabling device (1) to the inside of the accommodating part (25) of the starting device (2) 8 hours after the store opens, it is determined as Yes in step S9 and the process proceeds to step S4. Then, when the store clerk again takes out the invalidation device (1) from the accommodating portion (25) of the activation device (2), it is determined No in step S4 and the current time count is canceled at that time. The time count is newly started from.

As described above, the nullification device (1) of this embodiment
8 after being taken out from the accommodating portion (25) of the starting device (2)
When the time elapses, the operation off mode is set and the transmission of the invalidation signal to the outside is stopped. Therefore, even if a customer or a temporary staff member steals the invalidation device (1) from the store, another sale will be made 8 hours after it is taken out from the accommodating part (25) of the activation device (2). Invalidation device at the store
Since (1) cannot be used, illegal use of the invalidation device (1) is prevented. Further, the nullification device (1) of the present embodiment is
If the invalidating device (1) is once returned to the accommodating part (25) of the starting device (2) and then taken out of the accommodating part (25) of the starting 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) incorporated in the disabling device and the starting device of this embodiment, respectively. The circuit board (71) of the nullification device of the present embodiment is a receiving antenna (72),
The first part shown in FIG. 3 except for the signal amplification part (73) and the control part (74)
It has the same structure as the circuit board (11) of the embodiment. The receiving antenna (72) is configured by connecting the capacitor C2 and the coil L2 in parallel, and is connected to the control unit (74) via the signal amplification unit (73). On the other hand, the circuit board (26) of the starter is shown in FIG.
The circuit board 21 has the same structure as the circuit board 21 of the first embodiment shown in FIG. 3 except for the transmitting antenna 27 as shown in FIG. Transmitting antenna
(27) is constituted by connecting a capacitor C and a coil L in series, and is connected to the signal amplification section (24).

In the disabling device (1) of this embodiment, as shown in FIG. 2, the disabling device (1) is a housing portion for the starting device (2).
When accommodated in (25), the receiving antenna (72) of the disabling device (1) becomes the transmitting antenna (27) of the starting device (2) as shown in FIG.
Will be placed close to. In this state, a high-frequency current is obtained as an original start-up signal from the start-up signal generation section (23) of the starter, and the high-frequency current is amplified by the signal amplification section (24), and then the coil of the transmission antenna (27). Supplied to L. As a result, magnetic field lines are generated from the coil L of the transmitting antenna (27), and the magnetic field lines are received 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 composed of a burst wave of a predetermined pattern, and has one header section having a long ON period T and a plurality of code sections having a short ON period t.

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

In this way, the nullification device of this embodiment is
As in the first embodiment, as shown in FIG. 2, the starting device (2)
When it is housed in the housing part (25), the operation-on mode is set, an invalidation signal is transmitted to the outside, and it is taken out from the housing part (25) of the activation device (2) for a predetermined time, for example, 8 hours. When the time elapses, the operation-off mode is set, and the transmission of the invalidation signal to the outside is stopped.

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

FIG. 9 shows a structure of a circuit board (91) built in the disabling 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). The control unit (94) is registered with predetermined on-code data and off-code data, each of which consists of a three-digit number, for example.
Is the code data input from the data input section (93)
It is determined whether or not it matches the on-code data and further whether or not it matches the off-code data. And control unit (94)
Generates a switching signal for turning on / off the mode changeover switch (16) based on the time measurement result and the judgment result, and sends it to the mode changeover switch (16).
As a result, the mode switch 16 is controlled to be turned on / off.

FIG. 10 shows a control procedure by the control unit (94). First, in step S11, it is determined whether or not any code data is received from the data input unit (93). If No is determined, 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 the code data from (93) matches the on-code data, and if No, step S
Return to 11. If Yes is determined in step S12, the process proceeds to step S13 to switch the mode.
Turn on (16). As a result, the nullification device (9)
The operation on mode is set.

After initializing the counter variable n in step S14, the counter variable n is initialized in step S15.
To count up. Succeedingly, in a step S16, it is determined whether or not any code data is received from the data input unit (93), and if NO is determined, a step S17 is performed.
Move to. On the other hand, if Yes is determined in step S16, the process proceeds to step S18, and the data input unit
It is determined whether or not the code data from (93) matches the on code, and if Yes, step S14.
Return to. If No is determined in step S18,
In step S19, it is determined whether the code data from the data input section (93) matches the off code, and N
If it is determined to be o, the process proceeds to step S17,
If YES is determined, 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 more than a predetermined value N (N ≧ 1) set in advance. Here, the predetermined value N is set, for example, so that the elapsed time from when the value of the counter variable n is initialized to zero in step S14 until it becomes N is 8 hours. If No is determined in step S17, step S1
On the other hand, if YES is determined while returning to step 5, step S
Move to 20. In step S20, the mode selector switch (16) is set to off, and then the process returns to step S11. As a result, the nullification 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 to input the same code data as the on-code data. By performing this operation, it is determined Yes in step S12, and the mode switch (16) is set to ON in step S13. As a result, the disabling device (9) is set to the operation-on mode and always sends the disabling signal to the outside. Also, time counting is started. The clerk
When the product is properly sold to the customer, the disabling device (9) at hand sends a disabling signal to the alarm unit (3), and the alarm unit (3) is reset by the buzzer (31) not sounding. After setting the condition, remove the alarm unit (3) from the product and hand the product to the customer.

When 8 hours have elapsed from the time of opening the store, it is determined Yes in step S17, and the mode changeover switch (16) is turned off in step S20. As a result, the disabling device (9) is set to the operation off mode,
It will stop sending the invalidation signal to the outside. still,
The clerk operates the operation key (92) 8 hours before the store opens.
When the same code data as the on-code data is input by operating the button, it is determined as Yes in step S18, the process returns to step S14, the current time count is canceled, and a new time count is started from that point. It If the store clerk operates the operation key (92) and inputs the same code data as the off code 8 hours before the store opens, it is determined as Yes in step S19 and the process proceeds to step S20. , Mode selector switch (16)
Is set to off. As a result, the nullification device (9)
The operation off mode is set to stop the transmission of the invalidation signal to the outside.

If the same code data as the off code data is input by the operation key (92), the disabling device of this embodiment is set to the operation off mode regardless of the input time of the on code data, and the disabling device is disabled. Since the transmission of the activation signal to the outside is stopped, it is effective when the closing time is advanced and the time from opening to closing is shorter than 8 hours.

Fourth Embodiment The antitheft system of the present embodiment is similar to the first embodiment in that
Since the starting device (2) and the disabling device are provided and the structure of the starting device (2) is the same as that of the first embodiment shown in FIGS. 1 and 3, the 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) in the reset state as shown in FIG. Therefore, the disabling device can set the operation on mode and the operation off mode, and in the operation on mode, the signal output switch (62) is turned on to transmit the disabling signal to the outside. However, in the operation off mode, the signal output switch (62) is in the off state, and the transmission of the invalidation signal to the outside is forcibly stopped. The disabling device of this embodiment includes a control unit (63) having a function different from that of the first embodiment, and other configurations are the same as those of FIG. 1 except for the control unit (63) and the signal output switch (62). And 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 signal reception unit (13). A switching signal for turning on / off the mode changeover switch (16) is created based on the determination result of whether the generated signal is a start signal or not and the mode changeover switch (1
Send to 6). When the user sets the signal output switch (62) to ON while the mode changeover switch (16) is on, the invalidation signal generated from the invalidation signal generation unit (15) is the mode changeover switch (16). After being input to the signal amplification section (17) and amplified, it is supplied to the transmission antenna (18), converted into electromagnetic waves and transmitted to the outside. In this way, the disabling device is set to the operation on mode. on the other hand,
When the mode selector switch (16) is off, the invalidation signal generator (15) is irrespective of the state of the signal output switch (62).
The supply of the invalidation signal from the signal amplification unit (17) to the signal amplification unit (17) is stopped. In this way, the disabling device is set to the operation off mode.

FIG. 12 shows a control procedure by the control unit (63). First, in step S21, the signal receiving unit
Determine whether or not any signal was received from (13), and
If it is determined, the determination in step S21 is repeated. On the other hand, if Yes is determined in step S21, the process proceeds to step S22, it is determined whether or not 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 the condition is satisfied, the process proceeds to step S23, and the mode changeover switch (16) is set to ON. As a result, the nullification 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, and if Yes is determined, the determination in step S24 is repeated. On the other hand, if No is determined in step S24, step S2
After shifting to step 5 and initializing the counter variable n, in step S26, it is determined whether or not the signal output switch (62) is on. Here, if the store clerk sets the signal output switch (62) to ON in order to send the invalidation signal from the invalidation 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, and the counter variable n is counted up. Succeedingly, in a step S28, it is determined whether or not the counter variable n is equal to or larger than a preset 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 25 times a day, the predetermined value N is set to a value slightly larger than the value of 25, for example, 30. To be done. If Yes is determined in step S28, the process proceeds to step S31 and the mode switch (1
After setting 6) to OFF, the process returns to step S21. As a result, the disabling 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 it is determined No in step S26, the process proceeds to step S29, and the signal receiving unit (13)
If it is determined No, the process returns to step S26, while if Yes, the process proceeds to step S30 to receive the signal from the signal receiving unit (13). It is determined whether the signal is the activation signal from the activation device (2). If No is determined in step S30, the process returns to step S26, and if Yes is determined, the process returns to step S24.

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

In order to sell the product to the customer, the store clerk turns on the signal output switch (62) of the disabling device at hand to disable the disabling device to the alarm unit (3). After sending a signal and setting the alarm unit (3) 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 store clerk sets the signal output switch (62) to ON and uses the disabling device is counted, and when the number reaches 30 times, step S2
When it is determined to be Yes at 8, the mode changeover switch (16) is turned off at step S31. As a result, the invalidation device is set to the operation-off mode, and forcibly stops the transmission of the invalidation signal to the outside regardless of the state of the signal output switch (62). In addition, the clerk uses the invalidation device 3
If the invalidation device is returned to the inside of the accommodating portion (25) of the activation device (2) before being used 0 times or more, it is determined as Yes in step S30 and the process returns to step S24, after which the store clerk again invalidates. When the device is taken out from the accommodation part (25) of the activation device (2),
When it is determined No in step S24, the count of the number of times the store clerk has turned on the signal output switch (62) is canceled, and the count is newly started from that point.

The disabling device of this embodiment is taken out of the accommodating portion (25) of the starting device (2) and used for 30 times so that it 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 it is taken out from the accommodating portion (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 disabling device of this embodiment is configured such that the disabling device is temporarily activated by the starting device.
It returns to the accommodation part (25) of (2), and the accommodation part of the starting device (2) again.
If it is taken out from (25), the number of times the invalidation device can be used increases, so it is effective when there are many customers and the sales volume of merchandise is large.

Fifth Embodiment The nullification device of this embodiment includes a control unit having a function different from that of the fourth embodiment. Except for the control unit, the other construction is similar to that 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 this embodiment. First, in step S41, it is determined whether or not any signal is received from the signal receiving unit (13),
If No is determined, the determination in step S41 is repeated. If Yes is determined in step S41,
In step S42, it is determined whether the signal from the signal receiving unit (13) is the activation signal from the activation device (2),
If YES is determined, the process proceeds to step S43, and the mode switch (16) is set to ON. As a result, the nullification 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 Yes is determined, 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 turned on. If it is determined Yes, the process proceeds to step S47 to count up the counter variable n by x. Then, it transfers to step S50. Here, x is, for example, 1 when the signal output switch (62) is 1
10 times from the disabling device when set to ON
Set to a value of 10 if the invalidation signal is sent externally for seconds. On the other hand, if No is determined in step S46, the process proceeds to step S48, and the counter variable n
Is counted up by 1, the process proceeds to step S49, and it is determined whether or not any signal is received from the signal receiving section (13). If No is determined, step S50
Move to. If Yes is determined in step S49, the process proceeds to step S51, it is determined whether or not the signal from the signal receiving unit (13) is the activation signal from the activation device (2), and Yes is determined. If YES, the process returns to step S44, while 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) set in advance, and if No is determined, the process returns to step S46. Here, No is determined in step S50, further No is determined in step S46, and step S46 is performed.
If the process of step S50 is repeated, the count-up of step S48 is performed at intervals of 1 second, and the predetermined value N of step S50 depends on the frequency of use of the invalidating device and the time from the opening of the store to the closing of the store. Set to the value. If Yes is determined in step S50, the process proceeds to step S52, the mode switch (16) is set to OFF, and then the process returns to step S41. As a result, the disabling device is set to the operation off mode. The higher the frequency of use of the nullification device of this embodiment, the shorter the usable time.

The configuration of each part of the present invention is not limited to the above-mentioned embodiment, and various modifications can be made within the technical scope described in the claims. For example, in the above embodiment, when the disabling device is housed in the housing portion (25) of the activation device (2),
Alternatively, when the same code data as the on code data is input by the operation of the operation key (92), the mode changeover switch (16) is turned on. However, instead of these configurations, as shown in FIG. As shown in, a keyhole (81) is opened in the casing (80) of the disabling device (8), and the clerk can use the keyhole (81).
It is also possible to adopt a configuration in which the mode changeover switch (16) is turned on when the predetermined key (82) is engaged with and the on operation is performed.

[Brief description of drawings]

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

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

FIG. 3 is a block diagram showing a configuration of a circuit board incorporated in each of the starting device and the disabling device of the first embodiment.

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

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

FIG. 6 is a block diagram showing a configuration of a circuit board incorporated in each of a starting device and a disabling device of a second embodiment.

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

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

FIG. 9 is a block diagram showing a configuration of a circuit board incorporated in the nullification device.

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

FIG. 11 is a block diagram showing a configuration of a circuit board incorporated in each of an activation device and a disabling device of a fourth embodiment.

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

FIG. 13 is a flowchart showing a control procedure by a control unit of the nullification device of the fifth exemplary embodiment.

FIG. 14 is a perspective view showing 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 showing an appearance of an alarm unit.

[Explanation of symbols]

(1) Invalidation device (14) Control unit (16) Mode selector switch (2) Starter (3) Alarm unit (31) Buzzer (32) Alarm activation switch piece (4) Anti-theft gate

Continuation of the front page (56) Reference JP-A-9-267859 (JP, A) JP-A-9-185783 (JP, A) JP-A-7-65258 (JP, A) JP-A-8-83384 (JP , A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) G08B 23/00 530 G08B 23/00 520 G08B 13/00 G08B 13/24

Claims (8)

(57) [Claims] 1. An alarm unit comprising an alarm unit to be combined with an anti-theft object and a disabling device for transmitting a disabling signal to the alarm unit, wherein the alarm unit is capable of issuing an alarm. And a detection means that generates a detection signal by detecting that the connection state with the anti-theft object has been disconnected, and an alarm means that receives the detection signal and activates an invalidation signal from the invalidation device. When receiving, the invalidation device is provided with an alarm control means for invalidating the subsequent detection signal, and the invalidation device constantly generates the invalidation signal in the operation-on mode or generates the invalidation signal in response to a user operation. A signal generating means, a start command generating means for issuing a start command in response to a user operation, and a variable that increases with the passage of time or the number of user operations for generating the invalidation signal. Variable generating means to be generated, reset means for resetting the variable generating means in response to a user operation, and the invalidation signal generating means to set the operation-on mode in response to the start command, while the variable generated from the variable generating means An antitheft system comprising an invalidation control means for setting the invalidation signal generating means to an operation-off mode when a predetermined threshold is exceeded, wherein the invalidation device further comprises data input means. ,
An antitheft system in which, when start data representing a specific code is input by the data input means, the activation command generation means of the invalidation device issues a activation command, while the reset means resets the variable generation means. 2. The invalidation device comprises stop command generation means for issuing a stop command when stop data representing a specific code is input by the data input means, and the invalidation control means receives the stop command. The antitheft system according to claim 1, wherein the invalidation signal generating means is set to an operation off mode. 3. An activating device for transmitting an activating signal to the disabling device, the activating device invalidating the activating signal created by the activating signal creating means for creating the activating signal and the activating signal creating means. The disabling device comprises a receiving means capable of receiving a start signal from the transmitting means of the starting device by a user operation, and the starting command generating means starts from the receiving means. The anti-theft system according to claim 1 or 2, wherein the reset means resets the variable generating means when the receiving means receives the signal and issues a start command, and the receiving means stops receiving the start signal. 4. The starting device and the disabling device are respectively housed in separate casings, and the housing of the disabling device is recessed in the casing of the starting device, and the housing of the starting device casing is disabled. With the casing of the deactivating device accommodated, the transmitting means of the activating device and the receiving means of the deactivating device face each other, and the receiving means of the deactivating device receives the activating signal from the transmitting means of the activating device. Claim 3
Anti-theft system described in. 5. The antitheft system according to claim 4, wherein the transmitting means of the activation device and the receiving means of the disabling device are composed of a plurality of terminals that should be in contact with each other. 6. The antitheft system according to claim 4, wherein the transmitting means of the activation device and the receiving means of the disabling device are constituted by a transmitter and a receiver of a magnetic signal or an optical signal. 7. The antitheft system according to claim 1 or 2, wherein the data input means is a key input device. 8. The invalidating device comprises key means, and in response to an ON operation using the key means, the activation command generating means of the invalidating device issues a startup command, while the reset means resets the variable generating means. The anti-theft system according to claim 1.