JP5046686B2 - Security system and security receiver - Google Patents

Description

  The present invention relates to a security system and a security receiver that detect a certain abnormal state and execute a security process according to a detection result.

  In order to prevent illegal intrusions into the building from the outside, the security sensors that receive alarms by receiving detection signals (sensors) installed on doors, windows, etc. and wireless signals transmitted from detection sensors that detect intrusions A crime prevention system including a device (wireless crime prevention receiver) has been devised and implemented (see, for example, Patent Document 1).

JP 2005-173837 A

  The crime prevention receiver of such a crime prevention system is driven by a direct current power source converted from a commercial alternating current power source supplied through an outlet provided on a wall surface in the house or a built-in battery. Therefore, the operation of the security receiver can be easily stopped by a simple act of unplugging the power plug from the outlet or removing the battery.

  In other words, even if the crime prevention system is activated, the crime prevention function can be easily stopped by executing the act of stopping the crime prevention receiver as described above by an intruder illegally entering the house. There is a problem that it may end up.

  Therefore, in order to solve such a problem, a configuration is conceivable in which the security receiver is fixedly installed on the wall surface of the house and the power is directly supplied from the power line buried in the wall. However, if the security receiver is completely fixed and installed on the wall in this way, for example, when the installation position of the security receiver is to be changed due to a change in the indoor layout, etc., it is not possible to respond flexibly. There is a problem.

  Therefore, the present invention has been devised to solve the above-described problems, and suppresses an illegal act of stopping the crime prevention function by a third party and easily changes the installation position of the crime prevention receiver. An object of the present invention is to provide a security system and a security receiver that can be used.

The security system of the present invention includes a detection sensor that transmits a detection signal as a radio signal in response to detecting some abnormal state, and a predetermined security process in response to reception of the detection signal transmitted by the detection sensor. In a crime prevention system comprising a crime prevention receiver that executes a reception, the crime prevention receiver is driven by a DC power source, and when receiving the detection signal, reception that informs that an abnormal state has occurred according to its own operation state And a power supply unit that is fixedly installed so as to be embedded in the wall of the building where the security system is laid, converts an AC power source into a DC power source, and supplies the DC power source to the receiver body. The receiver main body includes a first locking portion that is detachably locked to the power supply unit on a back surface of the housing, and a first power supply unit that is electrically connected to the power supply unit. The power supply unit is electrically connected to the power supply terminal and a second locking unit that is detachably locked to the first locking unit on a surface in contact with the rear surface of the housing. A first power supply terminal of the receiver body and a second power supply part of the power supply unit are electrically connected, and a second power supply unit of the receiver body is connected. In a state where one locking part and the second locking part of the power supply part are locked, the rear surface of the housing of the receiver body, the power supply part, the first power supply part of the receiver body, and the power supply The second power supply unit is configured not to be exposed from the appearance of the receiver body, and the power source unit is attached to the receiver body. It makes it not exposed from the appearance of the receiver body, to solve the problems described above.

The crime prevention receiver of the present invention includes a detection sensor that transmits a detection signal as a radio signal in response to detection of some abnormal state, and a predetermined crime prevention response in response to reception of the detection signal transmitted by the detection sensor. In a security receiver of a security system comprising a security receiver that performs processing, the security receiver is driven by a DC power source and becomes abnormal when it receives the detection signal. A receiver body for informing the user, and fixedly installed so as to be embedded in the wall of the building where the security system is laid, converting AC power into DC power, and supplying the DC power to the receiver body It consists of a power supply part. The receiver main body includes a first locking portion that is detachably locked to the power supply unit on a back surface of the housing, and a first power supply unit that is electrically connected to the power supply unit. The power supply unit is electrically connected to the power supply terminal and a second locking unit that is detachably locked to the first locking unit on a surface in contact with the rear surface of the housing. A first power supply terminal of the receiver body and a second power supply part of the power supply unit are electrically connected, and a second power supply unit of the receiver body is connected. In a state where one locking part and the second locking part of the power supply part are locked, the rear surface of the housing of the receiver body, the power supply part, the first power supply part of the receiver body, and the power supply The second power supply unit is configured not to be exposed from the external appearance of the receiver body, and the receiver body is attached to the power source unit. And by, by not exposed from the perspective of the receiver body, to solve the problems described above.

  According to the present invention, it is possible to suppress an illegal act of stopping a security function by a third party and to easily change the installation position of the security receiver.

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

First, the crime prevention system 1 shown as embodiment of this invention is demonstrated using FIG. The security system 1 includes a plurality of detection sensors 10 _n (n is a natural number) and a security receiver 20 that can wirelessly communicate with the detection sensors 10 _n in two directions using a predetermined frequency band. .

First, the functional configuration of the detection sensor 10 _n will be described with reference to FIG. The detection sensor 10 _n transmits a radio signal to the security receiver 20, receives an antenna 11 that receives the radio signal transmitted from the security receiver 20, a radio transmission / reception unit 12, and a carrier wave having a predetermined frequency based on the data to be transmitted. modulation, a modem part 13 for taking out and demodulates the data modulated on the received radio signal, a signal processing section 14 for centrally controlling the detection sensor 10 _n, uniquely identifying at least the sensor 10 _n A data storage unit 15 that stores identification information to be detected, a sensor unit 16 that detects an intruder, a power supply control unit 17, and a power supply to each functional unit of the detection sensor 10 _n according to the control of the power supply control unit 17. A power source 18 such as a battery for supplying the sound and an acoustic unit 19 for sounding an alarm sound threatening the intruder.

Since the detection sensor 10 _n having such a configuration has a small shape and incorporates a power source 18 such as a battery, it can be installed in various places inside and outside various buildings including a house. The place where the detection sensor 10 _n is installed is determined by the sensing method of the sensor unit 16.

  The sensor unit 16 is a sensor that can detect any abnormal state in the management jurisdiction area, such as the presence of an intruder that has illegally entered the building or the area surrounding the building that is managed by the security system 1. For example, a magnet sensor (open / close sensor) that indirectly detects the presence of an intruder by detecting opening / closing of a window or door (door), or a temperature difference between the temperature of an object and the temperature of a person A heat ray sensor or the like that directly detects the presence of an intruder can be used.

As described above, the detection sensor 10 _n is installed in a window, a door (door) or the like when a magnet sensor is used as the sensor unit 16, and a building wall when a heat ray sensor is used. It will be installed on the ceiling.

The signal processing unit 14 detects the detection sensor 10 stored in the data storage unit 15 when the sensor unit 16 detects the presence of an intruder who has illegally entered the management jurisdiction area of the security system 1. _The identification information that uniquely identifies _n is read, the power control unit 17 is controlled, the power supply to the radio transmission / reception unit 12 and the modulation / demodulation unit 13 is started, and the radio transmission / reception unit 12 and the modulation / demodulation unit 13 are further controlled. Then, a detection signal which is a wireless signal with the read identification information attached is transmitted to the security receiver 20 via the antenna 11.

The signal processing unit 14 is an identification attached to the radio signal demodulated by the modem unit 13 in response to the radio signal received from the security receiver 20 and received via the antenna 11 and the radio transceiver unit 12. The information is compared with the identification information that uniquely identifies the detection sensor 10 _n stored in the data storage unit 15, and it is determined whether or not it is a radio signal transmitted to itself.

  When the identification signals match, the signal processing unit 14 determines that the signal is a radio signal transmitted to itself, and executes processing according to the command request for the transmitted radio signal.

The detection sensor 10 _n has a threatening function that threatens an intruder. As shown in FIG. 1, the detection sensor 10 _n includes an acoustic unit 19, and when the sensor unit 16 detects some abnormal state such as an unauthorized intrusion by an intruder, a threatening sound (intimidation) is generated from the acoustic unit 19. Intruders can be threatened by issuing messages.

Incidentally, intimidation functions of the sensor 10 _n is, because the it is enough to intimidate intruders present in the vicinity of the sensor 10 _n, is limited to the sound unit 19 to emit rattling sounds as described above For example, a lamp or a mechanical mechanism that emits strong light may be used.

  As shown in FIG. 1, the security receiver 20 includes a receiver body 20A on which the main functions of the security receiver 20 are mounted, and a power supply unit 20B that supplies power to the receiver body 20A. The power supply unit 20B is embedded in the wall of the building where the security system 1 is laid, converts commercial AC power into DC power, and supplies it to the receiver body 20A. On the other hand, the receiver main body 20A is detachably locked to the power supply unit 20B, and is electrically connected to the power supply unit 20B when locked to the power supply unit 20B. Thus, the external configuration of the security receiver 20 including the receiver main body 20A and the power supply unit 20B, a specific installation method, and the like will be described in detail later.

First, the functional configuration of the receiver body 20A will be described with reference to FIG. The receiver body 20A as shown in Figure 1, transmits a radio signal to the sensor 10 _n, the antenna 21 for receiving radio signals transmitted from the sensor 10 _n, a wireless transceiver 22, based on the data to be transmitted Modulator / demodulator 23 that modulates a carrier wave of a predetermined frequency and demodulates and extracts the data modulated into the received radio signal, signal processor 24 that comprehensively controls the receiver body 20A, and security system 1 A data storage unit 25 that stores identification information of all the detection sensors 10 _n constituting the operation unit, an operation unit 26 such as a push button for operating various functions of the receiver main body 20A, a display unit 27, An acoustic unit 28 that rings in response to receiving a detection signal transmitted from the detection sensor 10 _n and notifies a person in the vicinity that an intruder has been detected, and a power supply unit A power supply terminal 29 to which DC power is supplied from 20B and a control signal output terminal 30 for outputting a control signal from the signal processing unit 24 to an external device are provided.

  As an external device that receives a control signal from the signal processing unit 24 that is output from the control signal output terminal 30, an automatic notification that automatically notifies the center device that centrally manages the crime prevention system 1 via a telephone line or the like There are machines. In response to receiving the control signal output from the control signal output terminal 30, the automatic reporting device automatically reports to the center device that some sort of abnormal state has occurred in the security system 1.

  The receiver main body 20A having such a configuration is electrically connected to the power supply terminal 29 and the power supply connector 42 of the power supply section 20B when the receiver main body 20A is detachably locked to the fixed power supply section 20B. The connection is established and driven by the DC power supplied from the power supply unit 20B.

  In addition, the receiver main body 20A includes an external power input terminal 31, and can be driven by connecting an AC adapter or the like that converts and supplies commercial AC power to DC power, like the power supply unit 20B.

The display unit 27 is, for example, a light emitting element such as an LED (Light Emitting Diode), a light emitting lamp, or the like. The display unit 27 changes the display form in accordance with the lighting, extinction, and blinking control by the signal processing unit 24 when a wireless signal transmitted from the detection sensor 10 _n is received or when the operation unit 26 is operated. Thus, the signal reception status, operation status, etc. are visually presented to the user. For example, when a detection signal transmitted from the detection sensor 10 _n is received, a light-emitting lamp that specifies a detection area where an intruder can be detected by the installation of the detection sensor 10 _n blinks, and the intruder The user is notified of the position of.

  The display unit 27 may be of any type as long as the user can glance at the display result. For example, an LED that can emit red light, green light, and blue light is used. By changing the combination, the display form can be changed in the same manner as the above-described extinguishing, lighting, and blinking. In addition to such LEDs, for example, a small and thin EL (Electric Luminescence) light emitting panel may be used. The display unit 27 may be a liquid crystal display that can display character information and image information.

Data storage unit 25, all the identification information of the sensor 10 _n constituting the security system 1, are stored in association with information capable of specifying a detection area set up a detection sensor 10 _n. The information that can specify the detection area is, for example, information that specifies the display unit 27 that is a light-emitting lamp associated with the detection area, or symbol information that is displayed on the display unit 27 that is a liquid crystal display or a light-emitting panel. Etc.

Thereby, from the identification information acquired from the detection signal transmitted from the detection sensor 10 _n , information associated with the data storage unit 25 is acquired and presented to the user via the display unit 27, so that the intruder It is possible to specify the detection area where the is detected.

The signal processing unit 24 is an identification attached to the detection signal demodulated by the modem unit 23 in response to the detection signal transmitted from the detection sensor 10 _n and received via the antenna 21 and the wireless transmission / reception unit 22. The information is compared with the identification information that uniquely identifies the detection sensor 10 _n stored in the data storage unit 25, the information stored in association with the information is read, and the acoustic unit 28 is caused to ring. Then, the signal processing unit 24 presents the detection area where the intruder specified by the read information is detected to the user via the display unit 27.

  The receiver body 20A can set a monitoring mode, which is an operation mode of the receiver body 20A, such as a cut mode, a notification mode, and a warning mode for each detection area.

Setting detection area on the switching mode, the receiver main body 20A is not also sounding the alarm sound as has received the detection signal transmitted from the sensor 10 _n installed in the detection area for which a switching mode. The off mode is an operation mode in which the operation state of the receiver main body 20A is in a dormant state.

Further, when the detection area is set to the notification mode, the receiver main body 20A waits to sound the notification sound when a detection signal transmitted from the detection sensor 10 _n installed in the detection area set to the notification mode is received. In response to receiving the detection signal during the notification mode, the signal processing unit 24 generates a notification sound (notification message) and displays a notification (for example, a green lamp is lit) in the sound unit 28 and the display unit 27, respectively. Let it run.

When the detection area is set to the warning mode, the receiver main body 20A waits to sound an alarm sound when a detection signal transmitted from the detection sensor 10 _n installed in the detection area set to the warning mode is received. . In response to receiving the detection signal in the warning mode, the signal processing unit 24 generates an alarm sound (alarm message) and displays an alarm (for example, a red lamp lights up) on the sound unit 28 and the display unit 27, respectively. Let it run. In addition, when the alert mode is set, it is possible to set whether or not to output a control signal for controlling the automatic notification device that is an external device in response to receiving the detection signal.

  Next, the functional configuration of the power supply unit 20B will be described with reference to FIG. As shown in FIG. 1, the power supply unit 20B includes a power conversion unit 41, a power supply connector 42, a power supply line connection terminal 43 for connecting a power supply line for supplying commercial AC power, and a control signal output of the receiver body 20A. A control signal input terminal 44 connected to the terminal 30 and a signal line connection terminal 45 for connecting a signal line for transmitting the control signal input to the control signal input terminal 44 to an external device are provided.

  The power converter 41 converts the commercial AC power supplied via the power line connection terminal 43 into a DC power. The power supply connector 42 is connected to the power supply terminal 29 of the receiver body 20A, and supplies the DC power converted by the power converter 41 to the receiver body 20A.

(Appearance structure of security receiver 20 and state when installed)
Next, the external configuration of the security receiver 20 and the state when installed in a building will be described.

  FIG. 2 shows a state where the security receiver 20 is actually installed. FIG. 2A is a front view showing a state in which the receiver main body 20A is locked to the power supply unit 20B embedded in the wall W. FIG. FIG.2 (b) is the figure which showed the mode at the time of visually recognizing the crime prevention receiver 20 from the arrow A direction shown to Fig.2 (a).

  As shown in FIG. 2A, the receiver main body 20A is provided with an operation unit 26 and a display unit 27 on the front surface of the housing in consideration of operability and visibility. The operation unit 26 includes a warning mode switching button 26a, a notification mode switching button 26b, and a release button 26c for switching the above-described monitoring mode to the warning mode, the notification mode, and the off mode, respectively.

  As shown in FIG. 2B, the power supply unit 20B is fixedly installed in a switch box SB embedded in a predetermined wall W of the building where the security system 1 is laid. The switch box SB is defined by a predetermined standard, and collects a power line for transmitting a commercial AC power source laid in a wall, a control signal line, and the like (not shown) to the power source unit 20B. Is provided to facilitate the connection. In the switch box SB, an insulating separator SP for completely separating the power line and the signal line is provided in the center.

  FIG. 3 is an exploded perspective view of the power supply unit 20B. As shown in FIG. 3, the power supply unit 20B is a circuit block on which the power conversion unit 41, the power supply connector 42, the power supply line connection terminal 43, the control signal input terminal 44, the signal line connection terminal 45, etc. shown in FIG. 51 is mounted in the housing 52, and further assembled so as to cover the circuit block 51 with the housing 53, and screwed with screws 54. A locking member 55 for locking the receiver main body 20 </ b> A is screwed to the casing 53 of the power supply unit 20 </ b> B by a screw 56.

  Such a power supply unit 20B has the housing 52 as the rear surface and the housing 53 as the front surface, and is inserted into a switch box embedded in the wall of the building in the direction of arrow A shown in FIG. And fix it.

  FIG. 4 shows a state where the power supply unit 20B is viewed from the front when the power supply unit 20B is fixedly installed. As shown in FIG. 4, when the power supply unit 20 </ b> B is viewed from the front direction when the receiver main body 20 </ b> A is not locked, a slight thickness of the locking member 55 and a place where the power supply connector 42 is formed. The surface of the wall W is almost horizontal with only a slight dent. Therefore, even if the receiver main body 20A is attached or detached to be engaged with another power supply unit 20B, it is possible to avoid a significant loss of aesthetics.

  FIGS. 5A and 5B are views showing a state in which the power supply unit 20B assembled with all members is viewed from the directions of arrows A and B shown in FIG. 3, respectively.

  As shown in FIG. 5A, the power supply line connection terminal 43 is connected to a power supply line DL extending from a branch breaker (not shown), and the signal line connection terminal 45 is extended from an external device such as an automatic notification machine (not shown). A signal line SL is connected.

  Further, as shown in FIGS. 5 (a) and 5 (b), it is sandwiched between the concave portions x formed by symmetrical convex members 52a and 52b extending in the vertical direction at a substantially central position of the casing 52, as shown in FIG. As shown in b), an insulating separator SP which is a plate-like insulating member is provided. As a result, the power supply line DL and the signal line SL shown in FIG. 5A are completely separated electromagnetically. As shown in FIG. 2B, the insulating separator SP is formed in a U shape according to the shape of the housing 52 and the shape of the switch box SB.

  Next, the manner in which the receiver main body 20A is locked to the power supply unit 20B will be described with reference to FIG. As shown in FIG. 6, a locking opening 62 for locking the receiver main body 20A by the locking member 55 of the power supply unit 20B is formed on the back surface 61a of the casing 61 of the receiver main body 20A. . The locking opening 62 includes a first opening 62a having the same shape as that of the locking member 55 and a second opening 62b that is narrower in the left-right direction than the first opening 62a.

  When locking the receiver main body 20A with respect to the power supply unit 20B, first, align the position of the receiver main body 20A so that the locking member 55 is inserted into the first opening 62a of the locking opening 62, Subsequently, the receiver main body 20A is pulled downward in a state where the locking member 55 is inserted into the first opening 62a.

  At this time, due to the contact of the edge portion 61U, which is the upper edge of the second opening 62b formed in the receiver main body 20A, with the stopper portion 57 formed in the casing 53 of the power supply unit 20B, the receiver main body The downward movement operation of 20A is stopped and the receiver body 20A is supported. Further, by lowering the receiver main body 20A downward, the edge portions 61L and 61R, which are the left and right edges of the second opening 62b of the receiver main body 20A, are respectively left and right ends of the locking member 55 of the power supply unit 20B. It is sandwiched between the end portions 55 </ b> L and 55 </ b> R and the housing 53. Thus, the receiver main body 20A is locked to the power supply unit 20B by the locking opening 62 formed in the housing 61.

  Further, before the receiver main body 20A is locked to the power supply unit 20B, the power supply terminal 29 of the receiver main body 20A and the power supply connector 42 of the power supply unit 20B are connected, and the receiver main body 20A and the power supply are connected. The part 20B is electrically connected. Since this electrical connection location is not exposed on the exterior of the security receiver 20, the security receiver 20 is fixedly installed on the wall W at a glance and is connected to the power line laid in the wall W. You can give the impression of receiving power.

  In FIG. 6, the state of connection between the control signal output terminal 30 of the receiver body 20A and the control signal input terminal 44 of the power supply unit 20B is omitted, but the power supply terminal 29 and the power supply connector 42 are connected. When connecting, it shall be connected similarly.

  In this way, the receiver main body 20A locked to the power supply unit 20B can be easily detached from the power supply unit 20B by an operation completely opposite to the case of locking.

  As a result, when it is necessary to change the installation position of the security receiver 20 due to a layout change in the building or the like, a new switch box SB installed at a location not affected by the layout change is used. The power supply unit 20B is fixedly installed, and the detached receiver body 20A is locked to the newly fixed power supply unit 20B. In addition, when the security system 1 is laid in the building, assuming a layout change, if a plurality of switch boxes SB are installed and the power supply unit 20B is fixedly installed in advance, when the layout is actually changed, etc. The installation location of the receiver main body 20A can be moved very easily.

  Thus, when the security receiver 20 is configured so that the receiver body 20A is detachably locked to the power supply unit 20B that is fixedly installed, when the security receiver 20 is glanced, Since it is possible to give the impression that the receiver 20 is fixedly installed on the wall surface, the power supply to the crime prevention receiver 20 that is likely to be performed illegally by a third party such as an intruder who has illegally entered. It is possible to suppress the act of stopping the crime prevention function due to the interruption of the network. Moreover, even when there is a layout change in the building and the installation of the security receiver 20 that has been once installed needs to be changed, the installation position of the security receiver 20 can be easily changed.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

It is a figure for demonstrating the structure of the crime prevention system shown as embodiment of this invention. It is a figure for demonstrating the external appearance structure of the security receiver with which the said security system is provided. It is a disassembled perspective view of the power supply part of the said crime prevention receiver. It is the figure which showed the mode when the power supply part of the said crime prevention receiver fixedly installed in the wall was visually recognized from the front. It is a figure for demonstrating the mode of the site | part accommodated in a switch box in the power supply part of the said crime prevention receiver. It is a figure for demonstrating a mode that a receiver main body is latched with respect to the power supply part fixedly installed in the said crime prevention receiver.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Crime prevention system 10 _n detection sensor 20 Security receiver 20A Receiver main body 20B Power supply part 24 Signal processing part 29 Power supply terminal 30 Control signal output terminal 31 External power supply input terminal 41 Power supply conversion part 42 Power supply connector 43 Power supply line connection terminal 44 Control signal input terminal 45 Signal line connection terminal 51 Circuit block 52 Housing 53 Housing 55 Locking member 55L End portion 55R End portion 57 Stopper portion 61 Housing 61L Edge portion 61R Edge portion 61U Edge portion 61a Back surface 62 Locking opening portion 62a First opening 62b Second opening

Claims (2)

A detection sensor that transmits a detection signal as a radio signal in response to detection of some abnormal state, and a security receiver that executes a predetermined security process in response to reception of the detection signal transmitted by the detection sensor; In a security system with
The crime prevention receiver is driven by a DC power source, and when receiving the detection signal, a receiver main body for notifying that an abnormal state has occurred according to its operation state;
The security system is fixedly installed so as to be buried in the wall of the building where the security system is laid, and is composed of a power supply unit that converts AC power into DC power and supplies the DC power to the receiver body,
The receiver main body includes a first locking portion that is detachably locked to the power supply unit, and a first power supply unit that is electrically connected to the power supply unit, on a rear surface of the housing. And
The power supply unit is electrically connected to the power supply terminal and a second locking unit that is detachably locked to the first locking unit on a surface that contacts the back surface of the housing. Two power supply units,
The first power supply terminal of the receiver body and the second power supply part of the power supply unit are electrically connected, and the first lock part of the receiver body and the second lock of the power supply unit In a state where the receiver unit is locked, the back surface of the receiver body casing, the power supply unit, the first power supply unit of the receiver body, and the second power supply unit of the power supply unit include the receiver body. A security system , wherein the power supply unit is not exposed from the external appearance of the receiver body when the receiver body is attached . A detection sensor that transmits a detection signal as a radio signal in response to detection of some abnormal state, and a security receiver that executes a predetermined security process in response to reception of the detection signal transmitted by the detection sensor; In a security receiver of a security system comprising
The crime prevention receiver is driven by a DC power source, and when the detection signal is received, a receiver main body for notifying that an abnormal state has occurred according to its own operation state;
The security system is fixedly installed so as to be buried in the wall of the building where the security system is laid, and the AC power source is converted into a DC power source, and the power source unit supplies the DC power source to the receiver body.
The receiver main body includes a first locking portion that is detachably locked to the power supply unit, and a first power supply unit that is electrically connected to the power supply unit, on a rear surface of the housing. And
The power supply unit is electrically connected to the power supply terminal and a second locking unit that is detachably locked to the first locking unit on a surface that contacts the back surface of the housing. Two power supply units,
The first power supply terminal of the receiver body and the second power supply part of the power supply unit are electrically connected, and the first lock part of the receiver body and the second lock of the power supply unit In a state where the receiver unit is locked, the back surface of the receiver body casing, the power supply unit, the first power supply unit of the receiver body, and the second power supply unit of the power supply unit include the receiver body. The crime prevention receiver , wherein the power supply unit is not exposed from the appearance of the receiver body when the receiver body is attached .

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