JPH0765253A - Antitheft device - Google Patents

Abstract

PURPOSE:To prevent the antitheft device from malfunctioning and improve the reliability by inhibiting an alarm sound output means composed of a piezoelectric buzzer to send a medium for information transmission sent by a transmitter installed at a specific place. CONSTITUTION:When a switch 3 is turned OFF or when a sensor tag 1 passes through the installation place of a couple of panel type transmitters installed on both sides of the entrance of, for example, a store, the piezoelectric buzzer 21 put in a housing 2 sounds. The piezoelectric buzzer 21 functions as the alarm sound output means which outputs an alarm sound on the basis of received information of a receiving means (resonance antenna 22) and does not send the medium (radio wave) for information transmission that is sent by the oscillator installed in the specific place. Consequently, even when respective antitheft devices are provided nearby, the operation of the alarm sound output means never causes receiving means of other antitheft devices to malfunction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving means for receiving an information transmission medium transmitted from a transmitter installed at a specific place in a housing attached to an antitheft object, and detecting the receiving means. The present invention relates to an antitheft device provided with an alarm sound output means for outputting an alarm sound based on information.

[0002]

2. Description of the Related Art Such an anti-theft device is used in a state where it is attached to an anti-theft object such as a product displayed in a store, and an alarm is issued when the anti-theft object in that state is taken out of the store or the like. It emits a sound. That is, the anti-theft device has a receiving unit that receives a medium for transmitting information transmitted from a transmitter installed at a specific location, and an alarm sound output that outputs an alarm sound based on the detection information of the receiving unit. Means are provided, for example,
If the transmitter is installed at the entrance of the store, the receiving means will receive the information transmission medium transmitted from the transmitter when the anti-theft object with the anti-theft device is taken out of the store. As a result, the alarm sound output means outputs the alarm sound. Radio waves are generally used as a medium for transmitting information transmitted from the transmitter, and an electromagnetic buzzer has been conventionally used as an alarm sound output means.

[0003]

Therefore, since the electromagnetic buzzer is conventionally used as the alarm sound output means, the receiving means of another anti-theft device can receive the radio wave generated by the coil magnetic field of the electromagnetic buzzer. There was a risk that it would be received and cause a malfunction. That is, since the conventional alarm sound output means emits the same medium as the information transmission medium transmitted from the transmitter, the medium emitted from the alarm sound output means causes the receiving means of another anti-theft device to malfunction. There was a fear that. Therefore, in general, it is considered that the drive frequency of the alarm sound output means (the frequency of the alarm sound) and the reception frequency of the reception means are in different frequency bands, but nevertheless, the antitheft devices are close to each other. If it is provided, there is a problem that the above-mentioned malfunction occurs. The present invention has been made in view of the above circumstances, and an object thereof is to prevent malfunction of the anti-theft device and improve reliability.

[0004]

The antitheft device of the present invention comprises a housing mounted on an antitheft object, and a receiving means for receiving a medium for transmitting information transmitted from a transmitter installed at a specific location. And a warning sound output means for outputting a warning sound based on the detection information of the reception means, and the first characteristic configuration is that the warning sound output means transmits from the transmitter. It is configured so as not to emit a medium for transmitting information. The second characteristic configuration is that in the first characteristic configuration, the alarm sound output means is constituted by a piezoelectric buzzer. A third characteristic configuration is the same as the second characteristic configuration, in the housing.
A button battery for supplying electric power to the alarm sound output means and the alarm sound output means are provided so as to face each other, and a terminal connected to an electrode of the battery and a terminal connected to an electrode of the alarm sound output means are provided. A flat plate-shaped terminal portion is provided between the battery and the alarm sound output means.
A fourth characteristic configuration is the point that, in the first, second or third characteristic configuration, the alarm sound output means is configured to output an intermittent sound as an alarm sound. According to a fifth characteristic configuration, in the first, second, third, or fourth characteristic configuration, a sound emitting unit for emitting the alarm sound output from the alarm sound output unit to the outside of the housing. An opening is provided at a side surface of the housing. According to the sixth characteristic configuration, in the fifth characteristic configuration, a shielding wall for shielding the components in the casing from being exposed to the outside from the opening is provided in the casing.

[0005]

According to the first characteristic configuration of the present invention, even when the alarm sound output means is activated to generate an alarm sound, the same medium as the information transmission medium transmitted from the transmitter installed at a specific location is emitted. Therefore, even if the anti-theft devices are provided close to each other, the alarm sound output means does not cause the receiving means of the other anti-theft devices to malfunction. According to the second characteristic configuration, since the piezoelectric buzzer is used as the alarm sound output means, the alarm sound output means can be made thin and light. According to the third characteristic configuration, the button battery and the piezoelectric buzzer are provided so as to face each other, and a terminal connected to the electrode of the button battery and a terminal connected to the piezoelectric buzzer electrode are provided between the button battery and the piezoelectric buzzer. Since the flat plate-shaped terminal portion having the above is provided, it is possible to arrange three types of flat plate-shaped components (button battery, piezoelectric type buzzer, terminal portion) in a state of being stacked. According to the fourth characteristic configuration, since the alarm sound output means emits an intermittent sound as an alarm sound, it is possible for the clerk or the like to easily recognize the alarm sound and at the same time, at any time. Compared to outputting an alarm sound, the power consumption of the anti-theft device can be suppressed. According to the fifth characteristic configuration, since the alarm sound output from the alarm sound output means is emitted from the opening portion on the side surface of the housing, compared with the case where the opening portion for emitting the alarm sound is provided on the front surface or the bottom surface of the housing, It is possible to make it difficult to close the opening. In other words, if the anti-theft device is made thinner,
The side surface of the housing is narrower than the front and bottom surfaces of the housing. However, if an opening for emitting an alarm sound is provided on the front or bottom surface of the housing, the opening can be easily closed with a finger or the like. Although it is possible to prevent the alarm sound from being generated by such an action, it is possible to make it difficult to close the opening by providing the opening on the side surface of the housing. According to the sixth characteristic configuration, since the shielding wall that shields the components in the housing from being exposed to the outside through the opening for emitting the alarm sound is provided, the foreign matter inserted from the opening into the housing is prevented. Entry can be prevented by the shielding wall. In addition, the alarm sound generated in the housing bypasses the shielding wall, is guided to the opening, and is emitted to the outside of the housing.

[0006]

According to the first characteristic construction of the present invention, since the receiving means of another anti-theft device is not malfunctioned by the operation of the alarm sound output means, the malfunction of the anti-theft device can be prevented. Therefore, the reliability of the anti-theft device can be improved. According to the second characteristic configuration, since the alarm sound output means can be made thin and light, it is possible to further reduce the thickness and weight of the anti-theft device. According to the third characteristic configuration, three types of flat plate components (button battery, piezoelectric type buzzer, terminal portion) can be arranged in a state of being stacked, so that the antitheft device can be made even thinner. It has come to be able to plan. According to the fourth characteristic configuration, the alarm sound of the anti-theft device can be easily recognized, and the power consumption of the anti-theft device can be suppressed. Therefore, the efficiency of the anti-theft device can be further improved. It came to be possible. According to the fifth characteristic configuration, it is possible to make it difficult to close the opening. Therefore, the opening is closed with a finger or the like so that an alarm sound is not emitted and the object of anti-theft is taken away from the store or the like. It has become possible to prevent preliminary theft activities as much as possible. According to the sixth characteristic configuration, it is possible to prevent the foreign matter inserted through the opening from entering the housing, so that the foreign matter is inserted into the opening to destroy the components inside the housing. The act can be prevented as much as possible.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 2, the sensor tag 1 as an anti-theft device has an upper surface (contacting surface) 2c of a housing 2 abutting against an anti-theft object E and attached. Incidentally, FIG.
2B is a perspective view of the sensor tag 1, and FIG.
Shows the back surface 2n of the sensor tag 1. The sensor tag 1 is provided with a switch 3 having a swingable operated portion 3a that is biased to return to a protruding position that protrudes from the contact surface 2c, and the switch 3 swings the operated portion 3a. Since it is configured to be turned on / off by an operation, the operated portion 3a of the switch 3 is rocked depending on the presence or absence of the antitheft object E, and the switch 3 is turned on / off, whereby the sensor tag 1 is It is configured to be able to detect whether or not it has been removed from the antitheft object E.

In the housing 2 of the sensor tag 1, as shown in FIG. 1, an LED lamp (chip LED) 20, a piezoelectric buzzer (piezoelectric buzzer) 21, and a resonance antenna 22 composed of a coil, a capacitor and a resistor. An antenna input circuit 23 that outputs a reception signal when the resonance antenna 22 is in a reception state, a switch input circuit 24 that outputs an OFF signal indicating that state when the switch 3 is in an OFF state, and a reception signal from the antenna input circuit 23 Alternatively, a switching circuit 25 that outputs a control signal when an OFF signal is input from the switch input circuit 24, an oscillation circuit 26 that starts pulse oscillation when a control signal from the switching circuit 25 is input, and a control from the switching circuit 25 When a signal is input, the oscillation circuit 26 starts counting the number of oscillation pulses and exceeds the set count. That when the counter 27 outputs a count completion signal latch circuit 28 to maintain the count completion signal of the counter 27 is input to the switching circuit 25 to a state where the received signal or the OFF signal is input
When the count completion signal of the counter 27 is input,
A buzzer / LED driver 29 that lights the ED lamp 20 and sounds the piezoelectric buzzer 21, a flat button battery V that supplies power to each circuit in the housing 2, and a button battery V
Power switch 6 for turning on and off the power supply from the power supply to each circuit
And are provided.

In the circuit having the above-mentioned configuration, when the switch 3 is turned off while the power switch 6 is turned on and operated,
The piezoelectric buzzer 21 housed in the housing 2 sounds when the sensor tag 1 passes through an installation location of a pair of panel-shaped oscillators O as shown in FIG. 19, which are installed on both sides of a doorway of a store, for example. Is configured. In addition, in FIG.
Is an opening for releasing the sound from the piezoelectric buzzer 21 to the outside of the housing 2, and is provided on the side surface 2n of the housing 2.

The process until the piezoelectric buzzer 21 sounds will be briefly described below. When the sensor tag 1 attached to the antitheft object E so that the switch 3 is in the ON state and set to the operating state (switch 6 is turned on) is removed from the antitheft object E, the switch 3 is turned off. The switch input circuit 24 detects the OFF state. The switch input circuit 24 turns off the switch 3.
When the status is detected, the switching circuit 25 is turned off.
Output a signal.

The switching circuit 25 sends a control signal to the oscillation circuit 26 and the counter 27 while receiving the OFF signal from the switch input circuit 24, and the oscillation circuit 26 oscillates a pulse while receiving the control signal. The counter 27 counts the number of oscillation pulses of the oscillation circuit 26.
When the control signal stops, the oscillation circuit 26 stops pulse oscillation, the counter 27 stops counting, and resets the pulse count number. The counter 27 sends one pulse signal as a count completion signal to the latch circuit 26 and the buzzer / LED driver 29 every time the preset number of pulses is counted.

The buzzer / LED driver 29 intermittently sounds the piezoelectric buzzer 21 (outputs an intermittent sound) and blinks the LED lamp 20 while receiving the count completion signal. On the other hand, the latch circuit 28 receives the count completion signal of the counter 27 and maintains the switching circuit 25 in the state of receiving the OFF signal, whereby the switching circuit 25 continues to send the control signal to the oscillation circuit 26 and the counter 27. In other words, buzzer / LE
After the switching circuit 25 receives the OFF signal, the D driver 29 causes the piezoelectric buzzer 21 to sound and the LED lamp 20 to emit light after the counter 27 completes counting the set number of pulses. As a result, if the OFF signal is not continuously received for a certain period of time, the piezoelectric buzzer 21 and the LED
The lamp 20 does not operate to prevent malfunction due to noise or the like.

Further, once the counter 27 has sent the count completion signal, the switching circuit 25 continues to send the control signal regardless of the presence or absence of the OFF signal from the wire unit input circuit 24, so the power switch 6 is turned off. The piezoelectric buzzer 21 continues to emit an intermittent sound in synchronization with the count completion signal of the counter 27 until the LED lamp 20
Keeps blinking in synchronization with the count completion signal of the counter 27.

On the other hand, when the sensor tag 1 passes through the place where the oscillator O is installed, the resonance antenna 22 produces an electromotive force by the radio wave from the oscillator O, and the antenna input circuit 23 detects the electromotive force, The reception signal is output to the switching circuit 25. The operation of each circuit after the switching circuit 25 receives the reception signal is such that the switch 3 is turned off.
Since it is the same as the case of entering the state, description thereof will be omitted.

Therefore, the resonance antenna 22 functions as a receiving means for receiving a medium (radio waves) for transmitting information transmitted from the oscillator O installed at a specific location, and the piezoelectric buzzer 21.
Functions as an alarm sound output unit that outputs an alarm sound based on the reception information of the reception unit (resonance antenna 22), and also transmits a medium (radio waves) for transmitting information transmitted from the oscillator O installed at a specific location. It is configured not to emit.

The structure and operation of each component will be described below.
The housing 2 is a bottom case 2 as shown in FIGS. 3 and 4.
It is composed of a and a top case 2b. The bottom case 2a includes a switch 3, an LED lamp 20, an antenna 22, and a circuit board 30 on which various electronic components are mounted.
The jack unit 4, the terminal 31 for connecting the positive electrode of the button battery V, and the button battery V are incorporated. In the top case 2b, a speaker housing 32 accommodating the piezoelectric buzzer 21, a piezoelectric buzzer 21, a plate-shaped terminal portion 33, an LED window (light window) 34 for emitting light from the LED lamp 20, and a slider 5 are provided.
And are included. Then, the bottom case 2a and the top case 2b provided with the respective components are ultrasonically bonded to each other to form the sensor tag 1 shown in FIG. Therefore, the button battery V and the piezoelectric buzzer 21 are provided to face each other, and between the button battery V and the piezoelectric buzzer 21,
A terminal portion 33 is provided.

As shown in FIG. 6, the operated portion 3a of the switch 3 is formed by a coil spring 3d in two opposite directions e ₁ , e.
_It is urged so as to be swingable to ₂ and returned to a projecting position projecting from the contact surface 2c. Further, the coil spring 3d functions as a connecting piece that connects and disconnects the terminals 3b and 3c of the switch 3. That is, the coil central portion of the coil spring 3d is always in contact with the terminal 3b, and when the operated portion 3a pushes down the end portion of the coil spring 3d, the end portion of the coil spring 3d comes into contact with the terminal 3c. Incidentally, FIG.
6A is a perspective view of the switch 3, and FIG. 6B is a sectional view of the switch 3.

As shown in FIG. 7, the speaker housing 32 is configured to press-fit the piezoelectric buzzer 21 and the terminal portion 33 shown in FIG. 8, and the sound generated by the piezoelectric buzzer 21 is output from the opening 32a. It is configured to be released to the outside. In the figure, reference numeral 32b is a shield wall that shields the components in the housing 2 from being exposed to the outside through the opening 10, that is, prevents a foreign substance from being inserted through the opening 10. As shown in FIG. 8, when the terminal portion 33 is press-fitted into the speaker housing 32, terminals 33a and 33b connected to the electrodes (+, −) of the piezoelectric buzzer 21, a bottom case 2a, and a top case 2b. When ultrasonically bonding
The terminal 33c connected to the negative electrode of the button battery V is provided. 7A is a perspective view of the speaker housing 32, and FIG. 7B is a speaker housing 32.
8A is a perspective view of the terminal portion 33, and FIG. 8B is a bottom view of the terminal portion 33.

As shown in FIG. 9, the LED windows 34 provided at the corners of the housing 2 receive the light from one LED lamp 20, and the side surfaces 2d and 2e of the housing 2 with which the LED windows 34 are in contact. Inclined surfaces 34a and 34b that disperse in the direction are provided.

As shown in FIG. 10, the jack unit 4 has a key insertion hole 41 into which the rack portion K1 of the key K (see FIG. 18) is inserted and a set button pin insertion hole into which the protruding pin K2 of the key K is inserted. And 42 are provided. As shown in FIG. 12, the key insertion hole 41 has a pinion gear 43 that is rotated when the rack portion K1 is inserted into the key insertion hole 41, and a set button pin provided in the set button pin insertion hole 42. A movement prevention spring 44 for preventing movement of 45 (see FIG. 11) is provided. The pinion gear 43 is rotatably supported by the main body of the jack unit 4 in such a state that a part thereof projects into the key insertion hole 41 and another part thereof projects outside the jack unit 4. Incidentally, FIG.
0 (a) is a perspective view of the jack unit 4, FIG.
(B) is a side view of the jack unit 4.

A set button pin 45 slidable in the set button pin insertion hole 42 is arranged in the set button pin insertion hole 42, and the set button pin 45 is pushed to the end of the set button pin insertion hole 42. A metal contact spring 46 that is operated and swings up and down is provided. As shown in FIG. 11, the set button pin 45 includes an operated portion 45a that is pressed from the outside of the housing 2 and a positioning portion 45b that positions the set button pin 45 at a specific position within the set button pin insertion hole 42. And set button pin 4
A spring accommodating portion 45 accommodating a coil spring 47 that urges 5 to return in the direction opposite to the insertion direction of the set button pin 45.
c and an end portion 45g that pushes and operates the contact spring 46 to swing the contact spring 46 up and down.
11A is a plan view of the set button pin 45,
FIG. 11B is a sectional view of the set button pin 45.

In the space formed by the spring accommodating portion 45c and the inner wall of the set button pin insertion hole 42, the set button pin is projected from the inner wall of the set button pin insertion hole 42 as shown in FIG. A protrusion 42a for restricting the movement of 45 in the sliding direction is formed. Incidentally, the coil spring 47 is, as shown in FIG.
Since it is arranged between the inner wall of c and the protrusion 42a,
Set button pin 45 to set button pin 4 as described above.
The return urging force is applied in the direction opposite to the insertion direction of No. 5.

Positioning portion 45b of the set button pin 45
The positioning convex portion 45d is formed on the inner surface of the set button pin 45d so as to have elasticity so that the protruding portion 45d can extend and retract in the protruding direction.
An engaging concave portion 42b that engages with the positioning convex portion 45d in a state of being pressed is provided on the inner wall of the set button pin insertion hole 42. When the set button pin 45 is pushed, the end portion 45g of the set button pin 45
Contacts the contact spring 46 and swings the contact spring 46 up and down. Due to this swinging, the end portion of the contact spring 46 on the free end side comes into contact with the circuit board 30, and thus the two terminals on the circuit board 30 are short-circuited. Due to the short-circuiting of the two terminals, electricity is supplied from the battery V to each circuit in the housing 2, so that the contact spring 46 corresponds to the power switch 6 in FIG.

The jack unit 4 has a structure shown in FIGS.
As shown in FIG. 3, a movement prevention spring 44 is provided.
The movement prevention spring 44 is formed by a thin metal rod so as to be elastically deformable. One end of the movement prevention spring 44 is fixed to one side of the key insertion hole 41 to be a base end side, and the other end is elastically swingable. It is as the free end side 44a. End 4 of free end of movement prevention spring 44
As shown in FIG. 13, when the set button pin 45 is pushed, 4a has an elastic action of the movement preventing spring 44 with respect to the engaging portion 45e formed on the outer surface of the spring accommodating portion 45c of the set button pin 45. The intermediate portion 44b of the movement preventing spring 44 between the base end side end and the free end side end 44a is in a state of crossing the key insertion hole 41.

The top case 2b is provided with a slider 5 (see FIG. 14) having a rack portion 5a which meshes with the pinion gear 43 of the jack unit 4. As shown in FIG. 5, the slider 5 has a base portion 5b slidably engaged with a guide portion 2f provided on the inner wall of the top case 2b, and is slidably movable in both directions as indicated by arrows A and B. There is also a structure in which the tip portion of the elastically deformable extending portion 5c extending from the middle portion between the rack portion 5a and the base portion 5b is locked to the locking portion 2g of the top case 2b. The elastic action of 5c urges the return in the direction of arrow A. In the figure, 2h and 2i are projecting pieces for preventing the slider 5 from tilting, 2j is a projecting piece for holding the speaker housing 32, and 2k is a terminal 33.
a and 33b are projecting pieces for reinforcing contact between the terminals on the circuit board 30 and the terminals 33 on the projecting pieces 2k when the bottom case 2a and the top case 2b are ultrasonically bonded.
It is configured to press a and 33b toward the circuit board side.

Next, in order to start the operation of the sensor tag 1, the set button pin 45 is pushed by the projecting pin K2 of the key K, the power switch 6 is turned on, and the power switch is operated in the turned-on state. A mechanism for holding 6 will be described. Initially, the set button pin 45 is held at the position shown in FIG. 15 in a state where the free end side end portion of the movement prevention spring 44 is engaged with the engagement portion 45f of the set button pin 45.

When the operated portion 45a of the set button pin 45 in the jack unit 4 is pushed inward by the protruding pin K2 of the key K, as shown in FIG.
The end portion 45g of No. 5 abuts on the contact spring 46 and swings the contact spring 46 downward. Due to this swinging, the end portion of the contact spring 46 on the free end side comes into contact with the circuit board, and shorts the two terminals on the circuit board. As a result, the power switch 6 is turned on and operated, and the battery V is removed from the main body case 10.
Energization to each circuit in 2 is started. At this time, when the set button pin 45 is pushed in, the coil spring 4
7 is compressed and acts to push back the set button pin 45 to the outer side of the housing 2 (the direction opposite to the insertion direction of the set button pin 45). The free end side tip portion 44a of the movement preventing spring 44 extending from the key insertion hole 41 is engaged with the engagement recess 42d of the set button pin insertion hole 42, and the free end side tip portion 44a of the movement prevention spring 44 extends from the spring storage portion 4.
It engages with the engaging portion 45e on the outer surface of 5c, thus maintaining its position against the biasing force of the coil spring 47.

Next, the operation mechanism for turning off the power switch 6 to stop the operation of the sensor tag 1 will be described. In the state shown in FIG. 16, when the rack portion K1 is inserted into the key insertion hole 41, the rack portion K1 causes
The movement prevention spring 44 provided across the key insertion hole 41 is pressed, and the pinion gear 43 meshing with the rack portion K1 is rotated. When the middle portion 44b of the movement prevention spring 44 is pressed by the rack portion K1, the middle portion 44b of the movement prevention spring 44 is pressed against the wall portion of the key insertion hole 41, and as a result, the free end side of the movement prevention spring 44. The end portion 44a is swung downward, and the engagement between the free end side end portion 44a and the engaging portion 45e of the set button pin 45 is released. When the pinion gear 43 is rotated in the rack portion K1, as shown in FIG. 17, the rotation of the pinion gear 43 causes the rack portion 5 that meshes with the pinion gear 43.
The slider 5 provided with a moves in the direction of arrow B. The slider 5 is provided with a holding portion 5d that comes into contact with the end portion 45g of the set button pin 45 as the slider 5 slides in the direction of the arrow B.
When d presses the end portion 45g of the set button pin 45, the set button pin 45 moves to the outside of the housing 2 (set button pin 4
5 in the direction opposite to the inserting direction of 5), and the engaging convex portion 45d of the set button pin 45 and the set button pin insertion hole 42
Is disengaged from the engaging recess 42b.

As a result, the return biasing force of the coil spring 47 in the spring accommodating portion 45c causes the set button pin 4 to move.
5 returns to the state before the protruding pin K2 is inserted (the state of FIG. 15), the contact spring 46 is separated from the two terminals on the circuit board, and the battery V transfers to each circuit in the housing 2. Energization will be stopped. In the slider 5 that has slid in the direction of arrow B, the rack portion K1 has the key insertion hole 4
2 is pushed back by the elastic action of the extending portion 5c in the direction of arrow A, and the original position (see FIG.
Position). It should be noted that FIGS. 15, 16 and 17A are sectional views in a plan view, and FIGS. 15, 16 and 17B are sectional views in a side view.

[Other Embodiments] Other embodiments will be listed below. In the above embodiment, the piezoelectric buzzer (piezoelectric buzzer) 21 is provided as the alarm sound output means, but the present invention is not limited to the piezoelectric type buzzer, and other types such as an electrostatic type buzzer ( However, it may be configured by a device that does not emit radio waves). In the above embodiment, the opening 10 is the side surface 2n of the housing 2.
However, other side surfaces (for example, side surface 2)
An opening for emitting an alarm sound may be provided in d). As a result, the opening can be easily closed, and the anti-theft act of trying to take the anti-theft object outside the store or the like without making an alarm sound can be reliably prevented.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an anti-theft device according to an embodiment of the present invention.

FIG. 2 is an external view of an anti-theft device according to an embodiment of the present invention.

FIG. 3 is a perspective view illustrating constituent parts of a bottom case according to the embodiment of the present invention.

FIG. 4 is a perspective view illustrating a top case component according to an embodiment of the present invention.

FIG. 5 is a plan view of a top case according to the embodiment of the present invention.

FIG. 6 is an explanatory diagram of a switch according to an embodiment of the present invention.

FIG. 7 is an external view of a speaker housing according to an embodiment of the present invention.

FIG. 8 is an external view of a terminal portion according to the embodiment of the present invention.

FIG. 9 is a perspective view of an LED window according to an embodiment of the present invention.

FIG. 10 is an external view of a jack unit according to an embodiment of the present invention.

FIG. 11 is a structural explanatory view of a set button pin according to the embodiment of the present invention.

FIG. 12 is an explanatory cross-sectional view of a jack unit according to the embodiment of the present invention.

FIG. 13 is a perspective view of a main part according to the embodiment of the present invention.

FIG. 14 is an external view of a slider according to an embodiment of the present invention.

FIG. 15 is a sectional view of an essential part according to the embodiment of the present invention.

FIG. 16 is a cross-sectional view of essential parts according to the embodiment of the present invention.

FIG. 17 is a sectional view of an essential part according to the embodiment of the present invention.

FIG. 18 is an external view of a key according to the embodiment of the present invention.

FIG. 19 is an external perspective view of a transmitter according to an embodiment of the present invention.

[Explanation of symbols]

 2 housing 10 opening 21 alarm sound output means 22 receiving means 32b shielding wall 33 terminal section O transmitter V button battery

Front page continued (72) Inventor Tsutomu Ida 250-1 Uda, Tomioka City, Gunma Prefecture (72) Inventor Mitsuhiko Nakajima 9608 Nakanohara, Minamiminawa Village, Kamiina-gun, Nagano Prefecture

Claims (6)

[Claims] 1. A housing (2) attached to an anti-theft object, receiving means (22) for receiving a medium for transmitting information transmitted from a transmitter (O) installed at a specific location,
An anti-theft device provided with an alarm sound output means (21) for outputting an alarm sound based on the detection information of the receiving means (22), wherein the alarm sound output means (21) transmits the call. An antitheft device configured so as not to emit a medium for transmitting information transmitted from a device (O). 2. The antitheft device according to claim 1, wherein the alarm sound output means (21) is constituted by a piezoelectric buzzer. 3. A button battery (V) for supplying electric power to the alarm sound output means (21) and the alarm sound output means (21) are provided to face each other in the housing (2), A flat plate-shaped terminal portion (33) having a terminal connected to the electrode of the battery (V) and a terminal connected to the electrode of the alarm sound output means (21) includes the battery (V) and the alarm sound output. Anti-theft device according to claim 2, provided between the means (21). 4. The anti-theft device according to claim 1, 2 or 3, wherein the alarm sound output means (21) is configured to output an intermittent sound as an alarm sound. 5. A sound emission opening (10) for emitting an alarm sound output from the alarm sound output means (21) to the outside of the housing (2), the housing (2). The antitheft device according to claim 1, 2, 3, or 4, which is provided on a side surface of the device. 6. The housing (2) is provided with a shielding wall (32b) for shielding the components in the housing (2) from being exposed to the outside through the opening (10). The antitheft device according to item 5.