JP2949014B2 - Anti-theft device - Google Patents

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 a medium for transmitting information transmitted from a transmitter installed at a specific location in a housing attached to an anti-theft object, and detecting the receiving means. The present invention relates to an anti-theft device provided with 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 at a store, and an alarm is issued when the anti-theft object in that state is taken out of a store or the like. It emits a sound. That is, the antitheft device includes 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 detection information of the receiving unit. Means are provided, for example,
If the transmitter is installed at the entrance of the store, if you try to take the anti-theft object with the anti-theft device out of the store, the receiving means will receive the information transmission medium transmitted from the transmitter. As a result, the alarm sound output means outputs an alarm sound. In general, radio waves are used as a medium for transmitting information transmitted from the transmitter, and an electromagnetic buzzer has been conventionally used as an alarm sound output unit.

[0003]

Therefore, conventionally, since an electromagnetic buzzer is used for the alarm sound output means, the radio wave generated by the coil magnetic field of the electromagnetic buzzer can be received by the receiving means of another anti-theft device. There is a possibility that the data may be received and a malfunction may occur. In other words, since the conventional alarm sound output unit emits the same medium as the information transmission medium transmitted from the transmitter, the receiving unit of another anti-theft device malfunctions due to the medium emitted from the alarm sound output unit. There was a possibility that. For this reason, it is generally considered that the driving frequency of the alarm sound output means (frequency of the alarm sound) and the reception frequency of the receiving means are in different frequency bands, but the anti-theft devices are still close to each other. If it is provided, there is a problem that the above malfunction occurs. Therefore, by preventing malfunction of the anti-theft device,
In order to improve the sound quality, the alarm sound output means is provided with the transmitter
It is configured not to emit the information transmission medium transmitted from
Anti-theft devices have been proposed. Also, the alarm sound
An anti-theft device whose output means is composed of a piezoelectric buzzer
was suggested. However, regarding the thickness reduction of anti-theft devices,
There was room for improvement. Anti-theft devices are generally installed on products.
The anti-theft device is easy to use.
In order to improve the quality of the product display
There was a strong demand for a thinner prevention device . The present invention
Is made in view of the above situation, and its purpose
Another object of the present invention is to reduce the thickness of the anti-theft device.

[0004]

According to the present invention, there is provided an anti-theft device which emits an audible alarm to a housing attached to an anti-theft object.
An alarm sound output means for outputting is provided, and the first characteristic configuration is that the alarm sound output means 21
The alarm is constituted by a piezoelectric buzzer,
A button battery V for supplying power to the sound output means 21;
An alarm sound output means 21 is provided to face the battery V
Terminal to be connected to the electrode and the electrode of the alarm sound output means 21
Terminal part 33 having a terminal connected to the terminal 33
Is provided between the battery V and the alarm sound output means 21.
In that it is configured as A second feature configuration is the above-mentioned first feature configuration, wherein the alarm sound output means is provided.
Is configured to output an intermittent sound as an alarm sound
There is in the point. The third feature configuration is the first or second feature.
In the configuration, the alarm sound output from the alarm sound output means
For releasing sound to the outside of the housing
Is provided on the side surface of the housing. A fourth feature configuration is the above-mentioned third feature configuration, wherein the inside of the housing is
That the components inside the housing are exposed to the outside through the opening.
The point is that a shielding wall for shielding is provided.

[0005]

According to the first aspect of the present invention, an alarm sound output device is provided.
Since a piezoelectric buzzer is used for the step,
Button battery and piezoelectric buzzer that can be thin and light
And the button battery and the piezoelectric buzzer
Between the terminal connected to the button cell electrode and the piezoelectric buzzer.
-Flat terminal part with terminals for connecting to electrodes
, Three types of flat parts (button
Pond, piezoelectric buzzer, terminal section)
Can be arranged within. The alarm sound output means
Does not emit the information transmission medium transmitted from the transmitter.
The alarm sound output means is activated by
Even if an alarm is sounded, it is sent from the transmitter installed at a specific location
Do not emit the same medium as the information transmission medium
Even if each anti-theft device is installed in close proximity,
Malfunction of the receiving means of another anti-theft device by the operation of the force means
You don't have to make it. According to the second feature configuration, the alarm sound output unit emits an intermittent sound as an alarm sound.
Therefore, when the clerk recognizes the alarm sound,
It can be easy to use and outputs an alarm sound as needed
Power consumption of the anti-theft device can be reduced.
It has come to a conclusion. According to the third feature configuration, the alarm sound output means
Alarm sound is emitted from the opening on the side of the housing.
The opening for emitting the alarm sound is located on the front or bottom of the housing.
The opening can be harder to block than the surface.
it can. In other words, when the anti-theft device is made thinner,
The side of the housing should be narrower than the front and bottom.
However, the opening for emitting the alarm sound is located on the front of the housing.
Or on the bottom, easily close the opening with your finger, etc.
Do not emit an alarm sound by such an act)
However, by providing an opening on the side of the housing,
The mouth can be made difficult to close. 4th
According to the characteristic configuration, the parts in the housing are provided with an opening for emitting an alarm sound.
There is a shielding wall that shields the part from being exposed to the outside
Foreign matter inserted through the opening into the housing
Can be prevented by the shielding wall.
In addition, the alarm sound generated inside the enclosure bypasses the shielding wall and opens.
And is released to the outside of the housing.

[0006]

According to the first aspect of the present invention, an alarm sound is provided.
The output means can be made thin and light, preventing theft
It is possible to further reduce the thickness and weight of the locking device,
Types of flat parts (button cell, piezoelectric buzzer, tar
(Minal part) can be arranged inside the housing with the
Therefore, the thickness of the anti-theft device can be further reduced.
It has reached. According to the second feature configuration, the security of the anti-theft device
The alarm sound can be easily recognized, and the theft can be obtained.
The anti-theft device can reduce the power consumption of the anti-theft device.
The efficiency of the stop device can be further improved.
Was. According to the third characteristic configuration, it is difficult to close the opening.
The alarm sound by closing the opening with a finger, etc.
Take the anti-theft object out of the store, etc., without taking it out
Attempts to prevent theft in advance.
Was. According to the fourth characteristic configuration, the foreign matter inserted from the opening is provided.
The entry of objects into the enclosure can be prevented by the shielding wall
Let's insert foreign matter into the opening and destroy parts inside the housing
To prevent as much as possible theft.
Was.

[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 the anti-theft device is configured such that the upper surface (contact surface) 2 c of the housing 2 contacts the anti-theft object E and is attached. FIG.
FIG. 2A is a perspective view of the sensor tag 1, and FIG.
Indicates 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 which is urged to return to a projecting position protruding from the contact surface 2c, and the switch 3 is configured to swing the operated portion 3a. Since the switch 3 is turned ON / OFF by operation, the operated portion 3a of the switch 3 is swung by the presence or absence of the anti-theft object E, and the switch 3 is turned ON / OFF. It is configured to be able to detect whether or not it has been removed from the anti-theft object E.

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 are provided in a housing 2 of the sensor tag 1. 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 the 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 a switch input circuit 24, an oscillation circuit 26 that starts pulse oscillation when a control signal is input from the switching circuit 25, and a control from the switching circuit 25 When the signal is input, the counting of the number of oscillation pulses of the oscillation circuit 26 is started 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 for turning on the ED lamp 20 and sounding the piezoelectric buzzer 21, a flat button battery V for supplying power to each circuit in the housing 2, and a button battery V
Power switch 6 for turning on and off the power supply to each circuit from
And are provided.

[0009] The circuit having the above-described configuration is used when the switch 3 is turned off while the power switch 6 is turned on and operated.
When the sensor tag 1 passes, for example, a pair of panel-shaped transmitters O as shown in FIG. 19 installed on both sides of a doorway of a store, the piezoelectric buzzer 21 housed in the housing 2 sounds. Is configured. In FIG. 2, 10
Is an opening for emitting sound from the piezoelectric buzzer 21 to the outside of the housing 2, and is provided on the side surface 2 n of the housing 2.

Hereinafter, a process until the piezoelectric buzzer 21 starts sounding will be briefly described. When the sensor tag 1 attached to the anti-theft object E so that the switch 3 is turned on and set to the operating state (the switch 6 is turned on) is removed from the anti-theft 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 state is detected, the OFF state is supplied to the switching circuit 25.
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 performs pulse oscillation while receiving the control signal. , The counter 27 counts the number of oscillation pulses of the oscillation circuit 26.
Then, when the control signal stops, the oscillation circuit 26 stops the pulse oscillation, the counter 27 stops counting, and resets the pulse count. The counter 27 sends one pulse signal as a count completion signal to the latch circuit 26 and the buzzer / LED driver 29 each time the counting of the preset number of pulses is completed.

While receiving the count completion signal, the buzzer / LED driver 29 intermittently sounds the piezoelectric buzzer 21 (outputs an intermittent sound) and blinks the LED lamp 20. 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 control signals to the oscillation circuit 26 and the counter 27. In other words, buzzer LE
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 after the switching circuit 25 receives the OFF signal. 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, preventing malfunction due to noise or the like.

Further, once the counter 27 sends out 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 that the power switch 6 is turned off. The buzzer 21 emits an intermittent sound in synchronization with the count completion signal of the counter 27 until the LED lamp 20
Continues 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 transmitter O is installed, the resonance antenna 22 generates an electromotive force by radio waves from the transmitter O, and the antenna input circuit 23 detects the electromotive force, The received signal is output to the switching circuit 25. The operation of each circuit after the switching circuit 25 receives the reception signal is as follows.
This is the same as the case where the state is changed, and the description is omitted.

Therefore, the resonance antenna 22 functions as a receiving means for receiving an information transmission medium (radio wave) 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 receiving unit (resonant antenna 22), and transmits an information transmission medium (radio wave) transmitted from an oscillator O installed at a specific location. It is configured not to emit.

Hereinafter, the configuration and operation of each component will be described.
The casing 2 is, as shown in FIGS.
a and the top case 2b. A circuit board 30 on which a switch 3, an LED lamp 20, an antenna 22, and various electronic components are mounted is provided on the bottom case 2a.
, A jack unit 4, a terminal 31 for connecting the positive electrode of the button battery V, and the button battery V. The top case 2b includes a speaker housing 32 accommodating the piezoelectric buzzer 21, a piezoelectric buzzer 21, a flat terminal portion 33, an LED window (light window) 34 for emitting light from the LED lamp 20, and a slider 5
And are incorporated. Then, the sensor tag 1 shown in FIG. 2 is configured by ultrasonically bonding the bottom case 2a and the top case 2b provided with the respective components. 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 section 33 is provided.

As shown in FIG. 6, the operated portion 3a of the switch 3 is driven by a coil spring 3d in two opposite directions e ₁ and e _2.
And is urged to return to a protruding position protruding from the contact surface 2c. Further, the coil spring 3d functions as a connecting piece for connecting and disconnecting the terminal 3b and the terminal 3c of the switch 3. That is, the center of the coil of the coil spring 3d is always in contact with the terminal 3b, and when the operated portion 3a pushes down the end of the coil spring 3d, the end of the coil spring 3d comes into contact with the terminal 3c. FIG.
6A is a perspective view of the switch 3, and FIG. 6B is a cross-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 from the piezoelectric buzzer 21 is transmitted through the opening 32a. It is configured to be released to the outside. In the figure, reference numeral 32b denotes a shielding wall that shields components in the housing 2 from being exposed to the outside through the opening 10, that is, prevents a foreign object from being inserted through the opening 10. As shown in FIG. 8, terminals 33a, 33b connected to the electrodes (+,-) of the piezoelectric buzzer 21 when pressed into the speaker housing 32, the bottom case 2a, and the top case 2b, as shown in FIG. When ultrasonically bonded,
A terminal 33c connected to the negative electrode of the button battery V. FIG. 7A is a perspective view of the speaker housing 32, and FIG.
8A is a perspective view of the terminal section 33, and FIG. 8B is a bottom view of the terminal section 33. FIG.

As shown in FIG. 9, light from one LED lamp 20 is applied to the LED windows 34 provided at the corners of the housing 2, and the side surfaces 2d and 2e of the housing 2 with which the LED windows 34 contact. Inclined surfaces 34a and 34b for splitting light in the directions are provided.

As shown in FIG. 10, the jack unit 4 has a key insertion hole 41 for inserting a rack portion K1 of a key K (see FIG. 18) and a set button pin insertion hole for inserting a protruding pin K2 of the key K. 42 are provided. As shown in FIG. 12, the key insertion hole 41 includes 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-preventing spring 44 for preventing the movement of the moving member 45 (see FIG. 11) is provided. The pinion gear 43 is rotatably supported by the main body of the jack unit 4 with a part protruding into the key insertion hole 41 and another part protruding outside the jack unit 4. 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 disposed in the set button pin insertion hole 42, and an end of the set button pin insertion hole 42 is pushed by the set button pin 45. 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 part 45a pushed from the outside of the housing 2 and a positioning part 45b for positioning the set button pin 45 at a specific position in the set button pin insertion hole 42. And set button pin 4
A spring storage portion 45 for storing a coil spring 47 for urging the return of the set button pin 5 in the direction opposite to the insertion direction.
c, and an end 45g that pushes the contact spring 46 to swing the contact spring 46 up and down.
FIG. 11A is a plan view of the set button pin 45,
FIG. 11B is a sectional view of the set button pin 45.

As shown in FIG. 13, the set button pin projects from the inner wall of the set button pin insertion hole 42 into the space formed by the spring storage portion 45c and the inner wall of the set button pin insertion hole 42. A protruding portion 42a for restricting the movement of the shutter 45 in the sliding direction is formed. Incidentally, as shown in FIG. 13, the coil spring 47 is
c is arranged between the inner wall and the protrusion 42a,
As described above, the set button pin 45 is
5 is urged to return in the direction opposite to the insertion direction.

Positioning portion 45b of set button pin 45
The positioning button 45d is formed so as to have elasticity so as to be able to protrude and retreat in the protruding direction.
An engagement concave portion 42b is provided on the inner wall of the set button pin insertion hole 42 to engage with the positioning convex portion 45d when the is pressed. When the set button pin 45 is pressed, the end 45g of the set button pin 45 is pressed.
Contacts the contact spring 46 and swings the contact spring 46 up and down. This swing causes the free end of the contact spring 46 to come into contact with the circuit board 30, thereby short-circuiting the two terminals on the circuit board 30. Since the two terminals are short-circuited, the current 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. 1.

FIG. 12 and FIG.
As shown in FIG. 3, a movement preventing spring 44 is provided.
The movement preventing spring 44 is formed so as to be elastically deformable with a thin metal rod, and has one end fixed to one side of the key insertion hole 41 to be a base end and the other end swingable by elastic deformation. The free end side 44a. Free end side end 4 of movement prevention spring 44
4a, when the set button pin 45 is pressed, as shown in FIG. 13, the elastic action of the movement preventing spring 44 on the engaging portion 45e formed on the outer surface of the spring storage portion 45c of the set button pin 45. The intermediate portion 44b between the base end and the free end 44a of the movement preventing spring 44 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 that meshes with the pinion gear 43 of the jack unit 4. As shown in FIG. 5, the slider 5 has its base 5b slidably engaged with a guide 2f provided on the inner wall of the top case 2b, and is slidable in both directions indicated by arrows A and B. In addition, the extension portion is configured such that the distal end portion of an elastically deformable extension portion 5c extending from an intermediate portion between the rack portion 5a and the base portion 5b is engaged with the engagement portion 2g of the top case 2b. The return action is urged in the direction of arrow A by the elastic action of 5c. In the drawings, 2h and 2i are projections for preventing the slider 5 from tilting, 2j is a projection for holding the speaker housing 32, and 2k is a terminal 33.
a, 33b and the protruding pieces for reinforcing the contact between the terminals on the circuit board 30. When the bottom case 2a and the top case 2b are ultrasonically bonded, the protruding pieces 2k
a, 33b are pressed to the circuit board side.

Next, in order to start the operation of the sensor tag 1, the set button pin 45 is pushed with the projecting pin K2 of the key K to turn on the power switch 6, and the power switch is turned on in the turned-on state. 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 of the movement preventing spring 44 is engaged with the engaging 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 projecting pin K2 of the key K, as shown in FIG.
The end 45g of 5 comes into contact with the contact spring 46, and swings the contact spring 46 downward. Due to this swing, the free end of the contact spring 46 comes into contact with the circuit board, and short-circuits the two terminals on the circuit board. As a result, the power switch 6 is turned on and operated, and the battery V
Energization of 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 the set button pin 45 back to the outside of the housing 2 (in the direction opposite to the direction in which the set button pin 45 is inserted). The free end end 44a of the movement preventing spring 44 extending from the key insertion hole 41 is engaged with the engagement concave portion 42d of the set button pin insertion hole 42.
5c is engaged with the engaging portion 45e on the outer surface, and thus the position is maintained against the urging force of the coil spring 47.

Next, an 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
The movement preventing spring 44 provided in a state of crossing the key insertion hole 41 is pressed, and the pinion gear 43 meshing with the rack 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 of the key insertion hole 41, and as a result, the free end side of the movement prevention spring 44. The end 44a is pivoted downward, and the engagement between the free end 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 to mesh 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 pressing portion 5d which comes into contact with an end portion 45g of the set button pin 45 as the slider 5 slides in the direction of arrow B.
When d pushes the end 45g of the set button pin 45, the set button pin 45 is moved to the outside of the housing 2 (the set button pin 4
5 in the direction opposite to the insertion direction), and the engaging projection 45d of the set button pin 45 and the set button pin insertion hole 42
Is disengaged from the engagement recess 42b.

As a result, the return biasing force of the coil spring 47 in the spring storage portion 45c causes the set button pin 4
5 returns to the state before the protruding pin K2 is inserted (the state in FIG. 15), the contact spring 46 is separated from the two terminals on the circuit board, and the contact spring 46 is connected to each circuit in the housing 2 from the battery V The energization will be stopped. The slider 5 that has been slid in the direction of the arrow B has the rack portion K1
15, the extension portion 5c is returned and urged in the direction of arrow A by the elastic action of the extension portion 5c to return to the original position (FIG. 15).
Position). 15, (A) of FIG. 15, FIG. 16, and FIG. 17 are sectional views in plan view, and (B) of FIG. 15, FIG. 16, and FIG. 17 are sectional views in side view.

[Another Embodiment] Hereinafter, another embodiment will be described. In the above embodiment, the piezoelectric buzzer (piezoelectric buzzer) 21 is provided as the alarm sound output means. However, the present invention is not limited to the piezoelectric buzzer. However,
(Which does not emit radio waves).
In the above embodiment, the opening 10 is formed by the side surface 2n of the housing 2.
Provided on the other side (for example, side 2
An opening for emitting a warning sound may be provided in d). As a result, the opening can be easily closed, and the burglar alarm can be prevented from sounding, and the theft preparatory act of trying to remove the anti-theft object out of the store or the like can be surely prevented.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the structure shown in the attached drawings.

[Brief description of the 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 an explanatory perspective view of a bottom case component according to the embodiment of the present invention.

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

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

FIG. 8 is an explanatory diagram of an external appearance of a terminal unit 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 configuration explanatory view of a set button pin according to the embodiment of the present invention.

FIG. 12 is an illustrative sectional view of a jack unit according to an 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 explanatory view showing the appearance of a slider according to an embodiment of the present invention.

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

FIG. 16 is a sectional view of a main part according to an embodiment of the present invention.

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

FIG. 18 is an external view of a key according to an 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 O Transmitter V Button battery

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tsutomu Ida 250-1 Uda, Tomioka-shi, Gunma (72) Inventor Mitsuhiko Nakajima 9608 Nakahara, Minamiminowa-mura, Minamiminawa-mura, Kamiina-gun, Nagano Prefecture 62487 (JP, A) JP-A-2-253395 (JP, A) JP-A-62-151692 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) G08B 13/14 H01H 13 / 52

Claims (4)

(57) [Claims] 1. An anti-theft device comprising an alarm sound output means (21) for outputting an alarm sound on a housing (2) attached to an anti-theft object. Output means (21) is composed of a piezoelectric buzzer
The alarm sound output means (21) is provided in the housing (2).
Button battery (V) for supplying power and alarm sound output means
(21) and is provided opposite, terminal and said alarm sound output connected to the electrodes of said battery (V)
And a terminal connected to the electrode of the means (21).
A terminal (33) is provided with the battery (V) and the alarm sound.
Anti-theft device provided between output means (21)
Place. 2. An alarm sound output means (21) comprising :
Claims that are configured to output an intermittent sound as
1. The anti-theft device according to 1 . 3. An output from the alarm sound output means (21).
Sound for emitting the alarm sound to the outside of the housing (2)
An opening (10) for discharge is provided on the side surface of the housing (2).
The anti-theft device according to claim 1, wherein the anti-theft device is provided. 4. Inside the housing (2), inside the housing (2)
Parts are exposed to the outside through the opening (10).
The anti-theft device according to claim 3, further comprising a shielding wall (32b) for shielding .