JP6416347B2 - Anti-theft system for display electrical equipment - Google Patents

Description

The present invention is a system for preventing theft by generating an alarm when an unauthorized person tries to take an electrical device out of the store in a state where the electrical device is displayed in a store so that the customer can operate it freely for the hand. About.

In recent years, portable terminals called tablet portable terminals equipped with wireless communication functions are becoming widespread. For example, in restaurants and the like, customers can purchase products by using tablet portable terminals displayed according to each table. In addition to referring to the menu, ordering a desired product is performed. In addition, at home appliance mass retailers and the like, they are displayed as display samples that allow customers to freely operate products with their hands.

The tablet terminal is anchored to a fixed part such as a table or a shelf by a tether wire in order to prevent theft. However, since the tether wires are cluttered, there is a problem that the aesthetic appearance of the display atmosphere is impaired and the operation of the customer is hindered.

Therefore, it is desirable that the electric device can be freely moved without attaching a cable such as a tether wire to the electric device. However, in that case, it is possible for an unauthorized person to take the electrical device out of the store.

In order to prevent such theft, the device side device is connected to the electric device, the store side device is installed at a predetermined location in the store, and the predetermined distance between both devices is detected between the device side device and the store side device. The anti-theft system configured to determine that the device-side device has been taken out of a predetermined allowable area together with the electrical device and to generate an alarm when the predetermined distance is detected by configuring the wireless distance detecting means Has been proposed.

Japanese Patent No. 5280506

According to the anti-theft system of the above-mentioned patent document, the electric device is not restrained by a rope such as a tether wire and can move freely. For example, a tablet portable terminal that displays a menu in a restaurant or the like In this case, there is an advantage that it can be operated while handing it to a plurality of customers surrounding the table. When an unauthorized person tries to take an electric device out of the store, it is detected by the wireless distance detecting means, and an alarm is generated, so that theft can be prevented.

The wireless distance detecting means can be configured to receive a signal transmitted from a transmitter provided in one of the device side device and the store side device by a receiver provided on the other side. For example, the store side device Is installed in a theft risk area such as a boundary position of a predetermined permissible area to construct a theft prevention system. In this case, when the device side device is moved to the theft risk area and the receiver approaches the transmitter, the receiver receives a signal from the transmitter, thereby detecting a predetermined interval distance and determining that this is abnormal. Theft is prevented by generating an alarm.

Alternatively, the wireless distance detection means generally comprises a device side device with a security tag used in a store, and a shop side device with a security gate. It is also possible to construct an anti-theft system by installing it in an anti-theft area. In this case, when the crime prevention tag approaches the crime prevention gate to a position at a predetermined interval distance, theft is prevented by reacting to a magnetic field of a specific frequency and generating an alarm.

However, since such wireless distance detecting means is configured by a radio wave system or a magnetic system, an unauthorized person who has come to the store brings in a bag shielded by an aluminum foil laminate or the like and accommodates electrical equipment in the shield bag. When taking it out of the store in such a state, the distance detection means does not function normally and raises the problem that the purpose of preventing theft cannot be achieved.

In addition, when the tablet portable terminal is mounted in the casing in a state where it can be moved freely in the store and the device side device of the anti-theft system is provided in the casing, an unauthorized person removes the tablet portable terminal from the casing. When taking it out and taking it away, the distance detection means of the anti-theft system does not function normally and raises the problem that the purpose of anti-theft cannot be achieved.

For this reason, in addition to wireless distance detection, the present invention provides a system capable of preventing theft by generating an alarm when an unauthorized person attempts to remove a tablet portable terminal from the casing. As a further preferred embodiment, a second object is to provide a system configured to detect an alarm when an unauthorized person houses an electrical device in a bag or the like and generate an alarm. Is .

Therefore, the present invention is configured as a means for solving the first problem, in which a tablet portable terminal that can be operated by a customer from the display state is movably arranged in a store in a state where the tablet is built in a casing. In the configuration, the device side device installed in the casing, the store side device installed at a predetermined location of the store, a wireless distance detection means for detecting a predetermined distance between the device side device and the store side device, An anti-theft system comprising an alarm means for generating an alarm when it is determined that the device side device is taken out of a predetermined allowable area together with the tablet portable terminal by detecting the predetermined distance, and the casing is the tablet portable terminal The base part on the back side and the frame-like cover part on the front side, which are attached in a sandwich shape with a sandwich in between, are detachably fixed to each other, and the base And the frame-like cover part are provided with contact / separation detection means, and the contact / separation detection means detects the separation when the base part and the frame-like cover part are separated from each other, The configuration is such that an alarm is generated by the alarm means .

The contact / separation detecting means is preferably configured by a push button type contact / separation sensor provided inside the base part, and the contact / separation sensor pushes the push button when the frame-shaped cover is placed on the base part. It is turned off by moving the push button in the protruding direction with a spring when the frame cover is moved away from the base part. When it is on, a warning signal is generated by outputting a detection signal. It is preferable to constitute so as to be .

The device-side device includes distance detection ON / OFF means that allows the distance detection means to start and stop operation, and contact / separation detection ON / OFF means that enables the contact detection / separation detection means to start and stop operating. It is preferable to provide a wireless remote controller that enables the distance detection ON / OFF means and the contact / separation detection ON / OFF means to be remotely operated at a position away from the device side device .

In order to solve the second problem of the present invention, it is preferable that the device side device includes a light / dark detection means including a light / dark sensor for detecting light / darkness of light illuminated on an outer surface of the casing. It is preferable that an alarm is generated by the alarm means when “dark” is detected .

According to the present invention, since the tablet portable terminal 1 is housed in the casing 3 without being restrained by a tether wire or the like, the customer can freely operate for the hand so that it can be operated. The tablet mobile terminal 1 can be used in a product order system or the like.

Therefore, when an unauthorized person tries to take the tablet portable terminal 1 out of the store, it is detected by the wireless distance detecting means 18 of the device side device 2 in the casing 3 in which the tablet portable terminal 1 is installed, and an alarm is generated. To prevent theft.

By the way, in order for an unauthorized person to take the tablet portable terminal 1 out of the store, an attempt is made to take out the tablet portable terminal 1 from the casing 3 in which the device-side device 2 is installed, and the base portion 3a and the frame-shaped cover portion 3b of the casing 3 are taken. When the doors are separated from each other, for example, the door is closed, the contact / separation sensor 25 of the separation detection means 17 detects the separation and generates an alarm from the alarm means 16 to prevent theft .

Further, when an unauthorized person tries to take the tablet portable terminal 1 out of the store in a state where the tablet portable terminal 1 is hidden in the bag together with the casing 3 , the wireless distance detecting means 18 may not operate well. When it is housed in a bag shielded by an aluminum foil laminate or the like, detection by the wireless distance detection means 18 becomes extremely difficult. However , if the light and darkness detection means 19 is provided in the device side device 2, it is accommodated in the bag. By detecting the “darkness” of the time, an alarm sound is generated, so that theft can be suitably prevented.

It is a perspective view which shows each apparatus which comprises the antitheft system which concerns on one Embodiment of this invention. It is a perspective view shown in the state which decomposed | disassembled the tablet portable terminal and the casing. It is a perspective view which shows the casing and stand which equipped the tablet portable terminal inside. It is explanatory drawing which shows the electrical structure of an apparatus side apparatus. It is explanatory drawing which shows the function of a remote controller. The use state of the tablet portable terminal built in the casing is shown, (A) The side view of the state made into the standing posture, (B) is the side view of the state made into the prone posture.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

( Tablet mobile terminal )
In the drawing, the tablet portable terminal 1 is provided for a customer to order a desired product while referring to a product menu by arranging and displaying the table according to each table, for example, in a restaurant. Accordingly, the tablet portable terminal 1 itself is a known one, and includes those that are already used for a product ordering system in restaurants and the like.

(User side unit)
As shown in FIG. 1, the tablet portable terminal 1 is housed in a casing 3 provided with a device-side device 2 to be described later, and is combined with a stand 4 on which the casing 3 can be installed, whereby a user-side unit is provided. For example, in the case of a restaurant, each unit is arranged in each table. At this time, the tablet portable terminal 1 is installed in the casing 3 and can be freely operated by the customer with the hand, and is installed on the stand 4 when not in use.

The tablet portable terminal 1 housed in the casing 3 is used by the customer as a hand, and as shown in FIG. 6 (A), the casing 3 is placed on a stand 4 so that the display 1a is raised. As shown in FIG. 6B, the standing posture P1 to be displayed and the prone posture P2 to display the display 1a in the prone state by placing the back surface of the casing 3 on the upper surface of the table T. It is configured for use.

(Store side unit)
As shown in FIG. 1, a store-side device 5 is installed at a predetermined position in the store, and together with a wireless remote controller 6 that remotely controls the device-side device 2, it constitutes a store-side unit and is controlled by the store manager. Placed below.

(Structure of casing)
As shown in FIG. 2, the casing 3 is formed in a state in which the base part 3 a on the back side and the frame-like cover part 3 b on the front side, which are attached in a sandwich shape with the tablet portable terminal 1 sandwiched between them, It attaches so that attachment or detachment is possible with the fixing tools 7, such as.

As shown in FIG. 3, the base portion 3 a of the casing 3 is provided with a housing portion 8 that houses the device-side device 2, and is located on both sides of the housing portion 8 and protrudes from the back surface of the base portion 3 a. Pedestal portions 9 and 9 are provided, and by placing the pedestal portions 9 and 9 on the upper surface of the table T, a prone posture P2 as shown in FIG.

At this time, as shown in FIG. 6B, the pedestal portion 9 forms a gap in a floating state without the back surface of the casing 3 overlapping the upper surface of the table T, and has an inclined posture as shown by an angle θ. Thus, the installation surface is provided with a tapered surface 9a, and the display 1a is held in an inclined posture that is easy to visually recognize. And the base parts 9 and 9 are comprised so that the light guide 10 in which the illumination light in a shop is guide | induced toward the housing part 8 from between the uphill inclination edge part of the casing 3 and the upper surface of the table T is formed. .

(Casing and stand)
As described above, the casing 3 in which the tablet portable terminal 1 is housed is held in the standing posture P1 for displaying the display 1a in the standing state by being placed on the stand 4, and in this state, the tablet portable terminal 1 is attached to the tablet portable terminal 1. Charge the internal storage battery. Although not shown, the stand 4 is connected to an AC power source of the store via a power cable. In addition, it is good also as a structure which equipped the stand 4 with the storage battery which can be charged.

As shown in FIG. 4, the device side device 2 provided in the housing portion 8 of the casing 3 includes a power source 13 made of a commercially available battery or the like, and when placed on the stand 4, the power of the stand 4 A charging unit 12 is provided for receiving electric power supplied from the supply means 11 and charging a storage battery built in the electric device 1. In addition, although the connection of the power supply means 11 of the stand 4 and the charging part 13 constitutes a contact type by the contact terminals 11a and 12a in the case of illustration, it may constitute a non-contact type by an induction coil.

The charging unit 12 includes a power supply unit 15 that supplies power to the tablet mobile terminal 1. In the case of the illustrated embodiment, as shown in FIG. 2, a power supply unit 15 is configured by a cable 15 a and a connection terminal 15 b, and when the electric device 1 is installed in the casing 3, the connection terminal 15 b is connected to the electric device 1. Connected to the terminal.

(Configuration of equipment side device)
Further, as shown in FIG. 2, the device side apparatus 2 includes an alarm generating means 16, an approach / separation detecting means 17, a distance detecting means 18, and a light / darkness detecting means which are activated by receiving power from the power source 13. 19 is provided.

(Alarm generating means)
The alarm generating means 16 is configured to be driven when a detection signal is input by any one of the contact / separation detecting means 17, the distance detecting means 18 and the light / darkness detecting means 19, and the electronic synthesized sound stored in the memory. An alarm sound generator 20 that outputs a digital signal as an alarm sound by analog conversion, an amplifier 21 that amplifies the output alarm sound, a variable resistor 22 that controls the volume of the alarm sound, and an alarm sound externally An alarm sound generator 23 such as a speaker that emits toward the camera is provided, and alarm ON / OFF means 24 that can stop the generation of the alarm sound is provided.

As shown in FIG. 2, the operation part 22a of the variable resistor 22 is arranged facing the inside of the casing 3, and is configured to be operable only by a predetermined jig. Therefore, a customer etc. cannot operate freely from the outside of the casing 3.

As will be described later, the alarm ON / OFF means 24 is configured to be controlled by a wireless operation of the remote controller 6, and when a warning is generated and a temporary stop is required, the store manager can The alarm ON / OFF means 24 can be turned off by remote operation.

(Contact / separation detection means)
The contact / separation detection means 17 detects the alarm generation means when a fraudulent person separates from the state in which the base portion 3a and the frame-shaped cover portion 3b of the casing 3 are normally held apart by disassembling. 16 is provided with a contact / separation sensor 25 for inputting a detection signal. In the case of the illustrated embodiment, the contact / separation sensor 25 is composed of a push button type sensor provided inside the edge of the base portion 3a, and is pushed when the frame-shaped cover portion 3b is put in hand. When the button 25a is pushed in, it is turned off, and when the frame-shaped cover portion 3b is separated, the push button 25a is turned on when it is moved in the protruding direction by a spring, and a detection signal is output. .

Preferably, contact / separation detection ON / OFF means 26 for turning ON / OFF the contact / separation sensor 25 is provided, and the contact / separation detection ON / OFF means 26 is operated by wireless operation of the remote controller 6 as described later. It is configured to be controlled.

(Distance detection means)
The distance detecting means 18 constitutes a wireless distance detecting means for detecting a predetermined distance between the devices 2 and 5 between the device side device 2 and the store side device 5. Therefore, although not shown in the drawings, the distance detection means 18 is composed of a set of means provided in the apparatus side device 2 and means provided in the store side device 5. As described above, such a wireless distance detecting unit receives, for example, a signal transmitted from a transmitter provided in one of the device-side device 2 and the store-side device 5 by a receiver provided in the other. When the device side device 2 is moved toward the store side device 5 installed in the theft risk area, the receiver receives the signal from the transmitter to detect the predetermined interval distance. An abnormality is determined, and an alarm sound is generated by inputting a detection signal to the alarm generation means 16. In the case of the illustrated example, a configuration in which a transmitter is provided in the store side device 5 and a receiver is provided in the device side device 2 is illustrated, and it is assumed that the distance sensor 27 is configured by the receiver, as shown in FIG. In addition, a configuration in which the distance sensor 27 is provided in the distance detection means 18 is illustrated.

Alternatively, the wireless distance detection means may be configured such that a security tag generally used in a store is provided in the device-side device 2 and the store-side device 5 is constituted by a security gate, and the security tag is directed to the security gate. When a predetermined distance is approached, a detection signal may be input from the security tag to the alarm generation means 16 to generate an alarm sound by reacting to a magnetic field of a specific frequency. Accordingly, in this case, since it is sufficient to provide a security tag in the device side device 2, it is considered that the distance sensor 27 is constituted by the security tag, and the distance sensor 27 is detected by the distance detection means 18 as shown in FIG. The structure provided in FIG.

Preferably, distance detection ON / OFF means 28 for turning ON / OFF the distance sensor 27 is provided, and the distance detection ON / OFF means 28 is controlled by wireless operation of the remote controller 6 as will be described later. It is configured as follows.

(Brightness detection means)
The light / dark detection means 19 includes a light / dark sensor 29 such as a photosensor including a light receiving element, and when the light receiving state is “bright” and the non-light receiving state is “dark” and “dark” is detected, An abnormality is determined, and an alarm sound is generated by inputting a detection signal to the alarm generation means 16.

As shown in FIGS. 3 and 6, the light / dark sensor 29 is provided so as to be exposed from the inside of the housing portion 8 toward the light guide path 10. Therefore, as long as the electric device 1 housed in the casing 3 is normally used, the light / dark sensor 29 is in a light receiving state and does not determine abnormality. That is, as shown in FIG. 6 (A), not only the standing posture P1 standing and held on the stand 4 but also the prone posture P2 placed on the upper surface of the table T is formed by the pedestal portions 9 and 9. Light that enters the light guide 10 is preferably received, and an alarm sound is not erroneously generated.

However, if an unauthorized person accommodates the tablet portable terminal 1 in a bag such as a shield bag while being housed in the casing 3 for the purpose of theft, the light / dark sensor 29 detects “dark” due to the non-light receiving state, An alarm sound is generated by inputting a detection signal to the generating means 16.

In the case of the illustrated embodiment, a light / dark detection ON / OFF means 30 for turning ON / OFF the light / dark sensor 29 is provided. The distance detection ON / OFF means 30 is operated by wireless operation of the remote controller 6 as will be described later. It is configured to be controlled.

In this regard, the remote controller 6 can control the light / darkness detection ON / OFF means 30 independently of the contact / separation detection ON / OFF means 26 and the distance detection ON / OFF means 28 as described later. An operation means (button B in FIG. 5) dedicated to light / dark detection is provided. Therefore, for example, when conducting business in a store with dark lighting such as performing a concert or other event for a predetermined time, the store manager turns off the light / dark detection ON / OFF means 30 to turn on the light / dark sensor. Even if the function 29 is stopped and the electric device 1 is used in the dark state, it is possible to control so as not to generate an alarm sound.

At this time, as shown in FIG. 4, the light / darkness detection means 19 is provided with an indicator lamp 31 that is turned on / off in response to the ON / OFF of the light / dark sensor 29, and the indicator lamp 31 is visually recognized from outside the casing 3. By doing so, it is preferable to configure so that the operating state or the stopped state of the light / dark sensor 29 can be confirmed.

(Configuration and operation of remote controller)
As shown in FIG. 5, the remote controller 6 for remotely operating the device-side device 2 wirelessly includes four operation buttons indicated by A, B, C, and D.

The button A includes an all-ON operation means 32 for simultaneously turning on all of the alarm ON / OFF means 24, the contact / separation detection ON / OFF means 26, the distance detection ON / OFF means 28, and the light / darkness detection ON / OFF means 30. It is composed. Therefore, when the store starts business, the store manager activates the store-side device 5 and presses the button A of the remote controller 6, so that the contact / separation detection unit 17 and the distance detection unit 18 in the device-side device 2 are operated. Then, the operation of all the anti-theft functions by the light / darkness detection means 19 can be started, and the alarm generation means 16 can be put on standby in an operable state.

Since the tablet portable terminal 1 is housed in the casing 3 and is not restrained by a tether wire or the like, it can be easily operated while the customer freely moves it by hand, as shown in FIG. It can be operated even when installed on the stand 4. When installed on the stand 4, the storage battery built in the electric device 1 is charged via the charging unit 12.

As shown in FIG. 6 (A), the tablet portable terminal 1 has a standing posture P1 for displaying the display 1a in a standing state by placing the casing 3 on the stand 4, and as shown in FIG. 6 (B). By placing the back surface of the casing 3 on the upper surface of the table T, the display 1a can be operated in any prone position P2 in which the display 1a is displayed in the prone state. In this state, the light / dark sensor 29 receives normal light reception. Since it is in the state, the alarm generating means 16 is not operated.

In order for an unauthorized person to remove the tablet portable terminal 1 from the casing 3, when the fixing member 7 such as a screw is removed and the base portion 3 a and the frame-like cover portion 3 b are separated from each other, the contact / separation sensor 25 is activated to generate an alarm generating means. 16 generates an alarm sound.

In order for an unauthorized person to take away the tablet portable terminal 1 in a state where it is housed in the casing 3, if the unauthorized person moves outside the predetermined permissible area of the store, the distance detection means 18 constituted by the device side device 2 and the store side device 5. Is activated to generate an alarm sound from the alarm generating means 16.

Since an unauthorized person takes away the tablet portable terminal 1 in the casing 3, the light / darkness detection means 19 is activated to generate an alarm sound from the alarm generation means 16 when it is accommodated in the bag. In this case, when an unauthorized person is accommodated in a shield bag shielded with an aluminum foil laminate or the like, the distance detection means 18 may not operate, but since the light / darkness detection means 19 operates, it is preferable to prevent theft. be able to.

When a fraudulent person performs a fraudulent action, an alarm sound is emitted from the alarm generation means 16 of the device side device 2 housed in the casing 3. That is, the unauthorized person himself is warned from the unauthorized person's hand, and the store clerk is notified by sounding. By searching for the source of the alarm sound, the store clerk and the like can easily identify from which electrical device the alarm is issued even in a store crowded with many customers.

The button B constitutes a light / dark detection OFF dedicated operation means 33 for independently turning off only the light / dark detection ON / OFF means 30. Therefore, for example, when the store manager conducts business in a state where the lighting in the store is dark, such as performing an event such as a concert in the store for a predetermined time, the store manager turns off the light / dark detection ON / OFF means 30 to turn on the light / dark sensor. Even if the function 29 is stopped and the electric device 1 is used in the dark state, it can be controlled so that no alarm sound is generated. Thus, even when the light / darkness detection means 19 is turned off, the contact / separation detection means 17 and the distance detection means 18 are on standby, so that the security functions of both means 17 and 18 are not lost. In addition, in order to make the light / dark sensor 29 into an operating state again, the button A constituting the all-ON operation means 32 may be pressed.

The button C constitutes an alarm OFF dedicated operation means 34 that turns off only the alarm ON / OFF means 24 independently. Therefore, after an alarm sound is emitted from the alarm generating means 16 due to an illegal act of an unauthorized person and a store clerk or the like identifies the unauthorized person, the alarm sound is immediately stopped by pressing the button C, and the discomfort of other customers. Etc. can be prevented. In order to turn on the alarm ON / OFF means 24 again, the button A constituting the all-ON operation means 32 may be pressed.

The button D includes an all-off operation means 35 for simultaneously turning off all of the alarm ON / OFF means 24, the contact / separation detection ON / OFF means 26, the distance detection ON / OFF means 28, and the light / darkness detection ON / OFF means 30. It is composed. Therefore, when the store is closed, the store manager can stop all the anti-theft functions in the device-side device 2 simply by pressing the button D of the remote controller 6.

DESCRIPTION OF SYMBOLS 1 Tablet portable terminal 1a Display 2 Apparatus side apparatus 3 Casing 3a Base part 3b Frame-shaped cover part 4 Stand 5 Shop side apparatus 6 Remote controller 7 Fastening tool 8 Housing part 9 Base part 10 Light guide 11 Power supply means 11a Terminal 12 Charging Unit 12a terminal 13 power source 15 power supply unit 15a cable 15b connection terminal 16 alarm generation unit 17 contact / separation detection unit 18 distance detection unit 19 light / darkness detection unit 20 alarm sound generator 21 amplifier 22 variable resistor 22a operation unit 23 alarm sound generator 24 Alarm ON / OFF means 25 Contact / separation sensor
25a Push button 26 Contact / separation detection ON / OFF means 27 Distance sensor 28 Distance detection ON / OFF means 29 Light / dark sensor 30 Light / dark detection ON / OFF means 31 Indicator light 32 All ON operation means 33 Light / darkness detection OFF dedicated operation means 34 Alarm OFF only Operating means 35 All OFF operating means

Claims (4)

In the configuration in which the tablet portable terminal (1) as an electric device that can be operated by the customer from the display state is movably arranged in the store in the casing (3),
A device-side device (2) installed in the casing (3), a store-side device (5) installed at a predetermined location of the store, and a wireless device for detecting a predetermined distance between the device-side device and the store-side device. Distance detection means (18) and alarm means (16) for generating an alarm when it is determined that the device side device (2) is taken out of the predetermined allowable area together with the tablet portable terminal (1) by detecting the predetermined distance An anti-theft system,
The casing (3) is detachably fixed to the base part (3a) on the back side and the frame-like cover part (3b) on the front side, which are attached in a sandwich shape with the tablet portable terminal (1) in between. The base part (3a) and the frame-like cover part (3b) are provided with contact / separation detecting means (17) between each other,
The contact / separation detection means (17) detects an alarm by the alarm means (16) by detecting the separation when the base part (3a) and the frame-like cover part (3b) are separated from each other. An anti-theft system for display electrical equipment, characterized by being configured to generate. The contact / separation detection means (17) includes a push button contact / separation sensor (25) provided inside the base portion (3a).
The contact / separation (25) sensor is turned off by pushing the push button (25a) when the frame-shaped cover (3b) is held in the base (3a), and the frame-shaped cover (3b) is turned off from the base (3a). ), The push button (25a) is turned on by moving it in the protruding direction with a spring, and when it is on, a detection signal is output to generate an alarm by the alarm means (16). The antitheft system for display electrical equipment according to claim 1, wherein The device side device (2) includes a distance detection ON / OFF means (28) that enables the distance detection means (18) to start and stop operation, and an operation start and action of the contact / separation detection means (17). The contact / separation detection ON / OFF means (26) that enables the stop is provided.
It comprises a wireless remote controller (6) that enables the distance detection ON / OFF means (28) and the contact / separation detection ON / OFF means (26) to be remotely operated at a position away from the device side device (2). The antitheft system for display electrical equipment according to claim 1 or 2. The device side device (2) includes a light / dark detection means (19) provided with a light / dark sensor (29) for detecting light / darkness of light illuminated on the outer surface of the casing (3), and the light / dark sensor (29) 4. The system for preventing theft of display electrical equipment according to claim 1, 2 or 3, wherein an alarm is generated by said alarm means (16) when "dark" is detected.

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