JPH0765257A - Detecting tool for antitheft device - Google Patents

Abstract

PURPOSE:To make the detecting tool for the antitheft device easy to handle. CONSTITUTION:The detecting tool for the antitheft device is provided with fittings 3 equipped with a head part 3B which is larger in diameter than a rod type part 3A at one end of the part 3A and a housing 2 to which the other end of the rod type part 3A is connected and provided with an alarm control means which places an alarm means in operation when a preliminary action of burglar is taken; and the outward appearance of the head part 3B of the fittings 3 is so shaped as to promote inversion when the fittings are placed at the upright attitude with the head part 3B down and the fittings 3 keeps gravity center balance promoting the inversion when the fittings 3 are placed at the upright attitude with the head part 3B down.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a fixture having a head portion having a larger diameter at one end of a rod-shaped portion, and a casing to which the other end of the rod-shaped portion is connected. Further, the present invention relates to a detection tool for an antitheft device provided with alarm control means for activating the alarm means when a preliminary act of theft is performed.

[0002]

2. Description of the Related Art A detector for such an antitheft device is used by being attached to an antitheft object such as a product displayed in a store. When the detection tool is attached to the anti-theft object, the rod-shaped part of the attachment tool is connected to the housing with a part of the anti-theft object passed through. For the anti-theft object with the detection tool attached as described above, a preliminary act of theft, that is, the act of illegally taking the anti-theft object with the detection tool out of the store or stealing the detection tool When an action such as illegal removal from the object to be prevented is performed, the alarm control means provided in the housing activates the alarm means, and the alarm means emits an alarm sound, for example. By the way, in order to make it difficult to illegally remove the detecting tool from the antitheft object, which is a preliminary act of the theft, the mounting tool provided in this detecting tool generally forms the head of the mounting tool in a dish shape. The diameter of the rod-shaped portion is made larger than that of the rod-shaped portion so that it is difficult to cut the rod-shaped portion with a nipper or the like.

[0003]

Therefore, when the attachment is removed from the housing and placed in any place, the head of the rod-like portion may be stationary with the tip of the rod-shaped portion facing upward. It was For this reason, the operator of the detection tool needs to be careful not to touch the tip of the rod-shaped portion in order to prevent danger, and the detection tool for the anti-theft device is difficult to handle. The present invention has been made in view of the above circumstances, and an object thereof is to make a detection tool for an antitheft device easy to handle.

[0004]

In a detector for an anti-theft device according to the present invention, a fitting having a head portion having a larger diameter at one end of a rod portion and the other end of the rod portion are connected. A housing is provided, and the housing is provided with alarm control means for activating the alarm means when a preparatory act of theft is performed. The first characteristic configuration is the mounting. The outer shape of the head of the tool is formed in a shape that promotes a fall when the head is positioned downward and the mounting tool is placed in a standing posture, and the mounting tool positions the head downward. The point is that when the fixture is placed in the upright position, the center of gravity is balanced to promote a fall. The second characteristic configuration is the above first
In the characteristic configuration, the head of the fixture is formed of resin, and a metal plate is provided on the end surface of the inside of the head or on the side of the rod-shaped portion in a posture intersecting with the axis of the rod-shaped portion. is there.

[0005]

According to the first characteristic configuration of the present invention, when the mounting tool is detached from the housing and placed at any place, the mounting tool will have an outer shape of the head even when the head is placed downward. Also, the balance of the center of gravity of the mounting tool promotes the fall, resulting in a fall posture, so that the tip of the rod does not face upward. According to the second characteristic configuration of the present invention, an attempt is made to illegally remove the fixture from the housing, and a head of the fixture is cut with a nipper or the like in the longitudinal direction of the rod-shaped portion and along the periphery of the rod-shaped portion. Even if the resin part of the head can be cut, the metal plate provided on the head of the fixture prevents the cutting.

[0006]

According to the above-mentioned first characteristic structure, even if the mounting tool is detached from the housing and set, the tip of the rod-shaped portion does not face upward and remain stationary. Since it is not necessary to pay much attention to the tip of the rod-shaped portion, the detection tool for the anti-theft device has become easy to handle. According to the second characteristic configuration, in addition to the effect of the first characteristic configuration, it is possible to illegally remove the mounting tool from the housing while the head part of the mounting tool is made of resin having high mass productivity. Since it can be prevented more effectively, the reliability of the detection tool for the antitheft device can be further improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a detection tool for an anti-theft device of the present invention will be described below with reference to the drawings. As shown in the plan view of FIG. 2 (a) and the side view of FIG. 2 (b), the detection tool 1 for the antitheft device is a mounting tool that attaches the housing 2 to a product or the like that is an antitheft object. It consists of a mounting pin 3.

The mounting pin 3 is shown in FIGS. 3B and 4B.
As shown in FIG. 3, the rod-shaped portion 3A is made of metal and a resin head 3B that holds one end of the rod-shaped portion 3A. A disk-shaped metal plate 3a is attached in a state of being covered by 3B and orthogonal to the axis of the rod-shaped portion 3A, and an engaging recess 3b for engaging with the housing 2 is provided at the tip portion of the rod-shaped portion 3A. Has been formed.
The outer shape of the head portion 3B of the mounting pin 3 is substantially spherical as a whole, and the mounting side of the rod portion 3A is a flat surface. The outer shape of the head 3A and the rod-shaped portion 3A are made of metal and the head 3
By the balance of the center of gravity of the mounting pin 3 in which B is made of resin,
Even when the head 3B is positioned downward and placed in a standing posture, the mounting pin 3 does not fall down, and the tip of the rod-shaped portion 3A does not stand still in an upward posture.

When the casing 2 is attached to a product such as clothing, as shown in FIG. 4B, the rod-shaped portion 3A of the attachment pin 3 is attached to the casing 2 through a button hole of the clothes F or the like. . As shown in FIG. 1, in the housing 2, an LED lamp 20, a piezoelectric buzzer 21, a resonance antenna 22 including a coil L, a capacitor C, and a resistor R, and a reception signal when the resonance antenna 22 is in a reception state. An antenna input circuit 23 that outputs a signal, a detection switch S that turns on and off when the mounting pin 3 is inserted and removed, and a mounting pin input circuit 24 that outputs a mounting pin removal signal when the detection switch S is in the off state.
And a switching circuit 25 that outputs a control signal when a reception signal from the antenna input circuit 23 or a mounting pin detachment signal from the mounting pin input circuit 24 is input, and pulse oscillation occurs when a control signal from the switching circuit 25 is input. When the control signal from the oscillation circuit 26 to start and the switching circuit 25 is input, the counter 27 starts counting the number of oscillation pulses of the oscillation circuit 26, and outputs a count completion signal when the set count number is exceeded, and the count completion of the counter 27. When a signal is input, a latch circuit 28 that keeps the switching circuit 25 in the state in which the reception signal or the attachment pin detachment signal is input, and the LED lamp 20 is turned on when a count completion signal of the counter 27 is input. Buzzer / LED driver 29 that makes the piezoelectric buzzer 21 sound
And a battery V for supplying electric power to each circuit in the housing 2, and a power switch 6 for turning on / off the electric power supply from the battery V to each circuit.

The circuit having the above-mentioned configuration is installed when the mounting pin 3 is pulled out from the housing 2 and removed when the power switch 6 is turned on and operated, or the detection tools 1 are installed on both sides of a doorway of a store, for example. When a pair of panel-shaped oscillators O as shown in FIG. 6 are passed through, the piezoelectric buzzer 21 housed in the housing 2 sounds and outputs an alarm. As the oscillator O, one of the pair of panel-shaped ones described above may be installed on one side of the doorway, or may be installed on the floor surface of the doorway. The resonance antenna 22 adjusts its reception sensitivity in advance according to the expected installation interval of the pair of oscillators O.

In the following case, the piezoelectric buzzer 21 will be used.
I will briefly explain the process until the sound begins. First, when the mounting pin 3 is detached from the housing 2 and the detection switch S is switched from the ON state to the OFF state, the mounting pin input circuit 24 outputs a mounting pin detachment signal to the switching circuit 25. The switching circuit 25 sends a control signal to the oscillation circuit 26 and the counter 27 while receiving the attachment pin detachment signal,
While receiving the control signal, the oscillation circuit 26 oscillates a pulse, and 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. 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 preset counting of the number of pulses is completed.

While receiving the count completion signal, the buzzer / LED driver 29 causes the piezoelectric buzzer 21 to sound and the LED lamp 20 to emit light. On the other hand, the latch circuit receives the count completion signal of the counter 27 and maintains the switching circuit 25 in the state of receiving the attachment pin detachment signal, whereby the switching circuit 25 continues to send the control signal to the oscillation circuit 26 and the counter 27. . That is, the buzzer / LED 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 attachment pin detachment signal. As a result, the piezoelectric buzzer 21 and the LED lamp 20 do not operate unless the attachment pin disengagement signal is continuously received for a certain period of time, thereby preventing 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 attachment pin detachment signal from the attachment pin input circuit 24. The piezoelectric buzzer 21 continues to make an intermittent sound in synchronization with the count completion signal of the counter 27 until the LED lamp 20 is turned off.
Keeps blinking in synchronization with the count completion signal of the counter 27. When the detector 1 has passed the location where the oscillator O is installed, the resonance antenna 22 generates an electromotive force due to the radio wave from the oscillator O, and the antenna input circuit 23 detects the electromotive force and receives it in the switching circuit 25. Output a signal. The operation of each circuit after the switching circuit 25 receives the reception signal is the same as that when the mounting pin 3 is detached, and the description thereof will be omitted. Therefore, the resonance antenna 22, the antenna input circuit 23, the mounting pin input circuit 24, the switching circuit 25, the transmitting circuit 26, the counter 27, the latch circuit 28, and the buzzer / LED driver 29 warn when a preliminary act of theft is performed. LED lamp 20 which is means A
And alarm control means G for operating the piezoelectric buzzer 21.
Function as.

The mounting structure of the mounting pin 3 to the housing 2 will be described below. The mounting pin 3 is, as shown in FIGS.
The jack unit 4 is attached to the housing 2 while being inserted into the pin insertion hole 40 of the jack unit 4 provided in contact with the inner wall of the housing 2. As shown in FIGS. 3 to 5, the jack unit 4 is provided with a hook-like lock spring 41 that engages with the attachment pin 3 inserted into the pin insertion hole 40 to prevent the jack from coming off.
A detection switch S is provided at a position on the inner side of the lock spring 41 in the insertion direction of the mounting pin 3.

The material of the lock spring 41 is metal and has elasticity in a direction in which both end portions 41a and 41b approach or separate from each other. The lock spring 41 has, at its bent portion 41c, a spring locking projection 49 protruding from the main body of the jack unit 4.
The end 41a of the lock spring 41 is fixed to the main body of the jack unit 4. At the intermediate portion between the other end 41b of the lock spring 41 and the bent portion 41c,
As will be described later, a convex portion 41d that engages with the engaging concave portion 3b of the mounting pin 3 is provided in the pin insertion hole 40 so as to be able to extend and retract.

As shown in FIG. 7, the detection switch S has a shape in which cylinders having different diameters are stacked in two stages, and a flange 48a is formed at the end on the back side in the insertion direction of the mounting pin 3. Inside the detection switch S, a coil spring 48b having one end fixed to the inner surface of the collar 48a, a metal plate 48c holding the other end of the coil spring 48b, and a metal plate 48b.
The coil spring 48 having one end fixed to the surface opposite to the surface holding the end of the coil spring 48b in c.
and a resin plate 48e that holds the other end of the coil spring 48d. The central portion of the metal plate 48c is cut off in a circular shape so as not to come into contact with the tapered portion 3c at the tip of the mounting pin 3 inserted into the housing 2, and the resin plate 4c
The center portion of 8e is cut off in a circular shape so as to support the tapered portion 3c at the tip of the mounting pin 3. Also, the metal plate 48c
Protrudes through the side wall of the detection switch S,
The side wall of the detection switch S is partially cut off so as to allow the protruding portion to move in the insertion / removal direction of the mounting pin 3.

On the mounting surface 4a of the detection switch S in the main body of the jack unit 4, two divided electrode terminals 4b,
4c is formed. As shown in FIG. 1, the electrode terminals 4b and 4c are connected to mounting pin input circuits 24 provided in the housing 2, respectively. Adjacent to the pin insertion hole 40, a set button pin insertion hole 30 extending in a state of penetrating the jack unit 4 in a direction perpendicular to the pin insertion direction of the pin insertion hole 40 is provided. A set button pin 31 slidable in the set button pin insertion hole 30 is arranged in the set button pin insertion hole 30, and a set button pin 31 is set in the opening of the set button pin insertion hole 30 on the inner side of the housing 2. A metal contact spring 32, which is pressed by the button pin 31 and swings, is provided with one end fixed to the jack unit 4.

The set button pin 31 is, as shown in FIG. 8 (a) and FIG. 8 (b) showing a cross section taken along line EE in FIG.
And a positioning portion 31b for positioning the set button pin 31 at a specific position in the set button pin insertion hole 30 when pushed, and a return biasing force for the set button pin 31 in the direction opposite to the insertion direction of the set button pin 31. It is composed of a spring storage portion 31c for storing the coil spring 44.
As shown in FIG. 9, the spring accommodating portion 31c is formed in a box shape with one surface open, and is inserted into the space defined by the spring accommodating portion 31c and the inner wall of the set button pin insertion hole 30. The protruding portion 43 is formed in a state of protruding from the inner wall of the insertion hole 30. In addition, a box-shaped spring storage portion 31
Two engaging portions 31e and 31f, which are arranged in the sliding direction of the set button pin 31, are formed on the bottom portion of c for engaging with a tip portion of a movement preventing spring 47 described later.

The coil spring 44 is a spring accommodating portion 31.
It is arranged between the inner wall on the outer side of the housing 2 in c and the projecting portion 43 and urges the set button pin 31 to return in the direction opposite to the insertion direction of the set button pin 31 as described above. A positioning convex portion 31d is formed on the positioning portion 31b of the set button pin 31 so as to have elasticity so as to be able to extend and retract in the protruding direction, and the set button pin 31 is pushed to the inner side of the housing 2. An engaging recess 30a that engages with the positioning protrusion 31d is provided on the inner wall of the set button pin insertion hole 30.

When the set button pin 31 is pushed to the inner side of the housing 2, the housing 2 of the set button pin 31 is pressed.
The inner end contacts the contact spring 32 and swings the contact spring 32. Due to this swinging, the end portion of the contact spring 32 on the free end side comes into contact with the circuit board, and as shown in FIG.
As shown in, the two electrode terminals 6a and 6b formed on the circuit board are short-circuited. As a result, each circuit in the housing 2 is energized from the battery V, and the contact spring 32 and the two electrode terminals 6a and 6b correspond to the power switch 6 in FIG.

A key insertion hole 45 into which a key K for releasing the engagement of the mounting pin 3 to be described later is inserted is provided at a position of the set button pin insertion hole 30 opposite to the pin insertion hole 40.
As shown in FIG. 10, the key insertion hole 45 is provided with a pinion gear 46 that is rotated when the disengagement key K is inserted into the key insertion hole 45, and a set button pin insertion hole 30. A movement prevention spring 47 for preventing movement of the set button pin 31 is provided.

The pinion gear 46 is rotatably supported on the body side of the jack unit 4 in a direction in which its teeth extend perpendicularly to the insertion direction of the engagement releasing key K, and a part of the pinion gear 46 is inserted in the key insertion hole 45. Projection and other part is Jack unit 4
It is in a state of protruding to the outside of. Also, the pinion gear 4
6 is supported so as to be able to move a little in the direction perpendicular to the paper surface in FIG. 3A, and inside the key insertion opening 45 when the engagement releasing key K is not inserted. It is located on the other side so as not to mesh with a rack portion 5a of a slider 5 described later.

The movement preventing spring 47 is formed of a thin metal rod so as to be elastically deformable, and one end thereof is fixed to one side portion near the opening of the key insertion hole 45 and can be rocked by elastic deformation. The free end side end portion of the movement prevention spring 47 is pressed by either the engagement portion 31e or 31f of the set button pin 31 and the elastic action of the movement prevention spring 47 according to the position of the set button pin 31 in the sliding direction. And the set button pin 3 is engaged by the urging force of the coil spring 44.
1 is prevented from sliding on the outside of the housing 2.
Note that FIG. 20 shows a state in which the engagement portion 31f is engaged. An intermediate portion between the base end side end and the free end side end of the movement prevention spring 47 is in a state of traversing the key insertion hole 45.

A rack portion 5a which meshes with the pinion gear 46 of the jack unit 4 in the state shown in FIG.
A slider 5 shown in FIG. 11B is provided. The slider 5 has its base portion 5b slidably engaged with a guide portion (not shown) provided on the inner wall of the housing 2, and the slider 5 has a direction indicated by an arrow P in FIGS. It is slidable in the insertion / removal direction,
Further, the elastically deformable extension portion 5c extending from the middle portion between the rack portion 5a and the base portion 5b is locked to the housing 2 at the tip portion of the extension portion 5c. It is urged to return to the inside of the body. It should be noted that the extension 5c is omitted in FIGS. 3 to 5 in order to make the drawings easy to see.

Next, the engagement and disengagement of the mounting pin 3 with the housing 2, and the switching of energization / non-energization from the battery V to each circuit in the housing 2 will be described. First, when the mounting pin 3 and the housing 2 are engaged with each other, the mounting pin 3 shown in FIG.
From the state where the engagement is released, the mounting pin 3 is passed through the clothing material F of the clothing, and the mounting pin 3 is inserted into the pin insertion hole 40 of the jack unit 4 as shown in FIG. The coil spring 48 provided with the mounting pin 3 in the pin insertion hole 40
When it is inserted against the biasing force of b and 48d, the engaging recess 3b of the mounting pin 3 engages with the protrusion 41d protruding into the pin insertion hole 40 of the lock spring 41, and the coil spring 48
The mounting pins 3 are prevented from moving in the releasing direction by the urging forces of b and 48d to maintain the engaged state.

During insertion until the engaging concave portion 3b of the mounting pin 3 and the convex portion 41d of the lock spring 41 are engaged, the taper portion 3c at the tip of the mounting pin 3 contacts the resin plate 48e on the jack unit 4 side. And coil spring 48
When the mounting pin 3 is further inserted against the biasing forces of b and 48d, the metal plate 48c moves to the inner side of the housing 2, and the two divided electrodes formed on the mounting surface 4a of the detection switch S. It contacts the terminals 4b and 4c and shorts them. In this state, the detection switch S shown in FIG. 1 has changed from the OFF state to the ON state. At the time when the metal plate 48c short-circuits the two divided electrode terminals 4b and 4c, the coil spring 4
8d still has a margin for contraction, and the mounting pin 3 is further inserted so that the mounting pin 3 and the lock spring 41 are engaged with each other. This completes the attachment of the detection tool 1 to the product, and then activates the detection tool 1.

In order to start the operation of the detection tool 1, FIG.
This is performed using the power supply setting jig D as shown in (a) and (b). With the projecting pin D1 of the power supply setting jig D, the operated portion 31a of the set button pin 31 of the jack unit 4
When is pushed inward, the end 31g of the set button pin 31 on the inner side of the housing 2 contacts the contact spring 32, and the contact spring 32 is swung. Due to this swinging, the end portion of the contact spring 32 on the free end side contacts the circuit board, and shorts the two electrode terminals 6a and 6b on the circuit board. As a result, energization from the battery V to each circuit in the housing 2 is started. When the set button pin 31 is not pushed in, the operated portion 31a, which is the end of the set button pin 31 on the outer side of the housing 2, has the set button pin insertion hole 30.
The positioning step portion 30b, which is in contact with the end portion on the positioning portion 31b side of the spring storage portion 31c, is located on the inner wall of the set button pin insertion hole 30 so as to be located at a position slightly recessed from the opening on the outer side of the housing 2. Has been formed.

When the set button pin 31 is pushed, the free end of the movement preventing spring 47 is engaged with the engaging portion 31e of the set button pin 31 from the state shown in FIG. As shown in, the state is switched to the state in which the set button pin 31 is engaged with the engaging portion 31f. At the position where the set button pin 31 swings the free end side end of the contact spring 32 toward the circuit board side, the coil spring 44 is compressed and the set button pin 31 is pushed back to the outside of the housing 2. As described above, the free end side of the movement preventing spring 47 and the engaging portion 31f of the set button pin 31 are engaged with each other to prevent the set button pin 31 from sliding and moving, and Positioning projection 3 of 31
1d and recess 30a for engagement of set button pin insertion hole 30
The sliding movement of the set button pin 31 is also prevented by the engagement with.

Next, when the engagement between the mounting pin 3 and the jack unit 4 is released from the state shown in FIG. 4, the engagement releasing key K shown in FIG. 13 is used. Disengagement key K
Includes a rack portion K1 that meshes with the pinion gear 46 of the jack unit 4, and in the state shown in FIG.
When the rack portion K1 is inserted into the key insertion hole 45, the rack portion K1 lifts the pinion gear 46 to mesh with the rack portion 5a of the slider 5, and the rack portion K1 and the pinion gear 46 mesh to insert the rack portion K1. Accordingly, the pinion gear 46 rotates. This pinion gear 46
The rotation of moves the slider 5 having the rack portion 5a that meshes with the pinion gear 46 from the position shown by the alternate long and short dash line in FIG. 5 to the position shown by the solid line. In FIG. 10, the position of the pinion gear 46 is shown when it is lifted by the rack portion K1. When the rack portion K1 of the disengagement key K is inserted into the key insertion hole 45, the movement prevention spring 47 provided so as to cross the key insertion hole 45 is pressed to move the movement prevention spring 47 to the key. It is pressed against the wall of the insertion hole 45. As a result, the free end side end portion of the movement prevention spring 47 swings, and the free end side end portion and the engagement portion 31f of the set button pin 31 are disengaged.

The slider 5 is brought into contact with the first pressing portion 5d which comes into contact with the end portion 41b of the lock spring 41 as the slider 5 slides and the inside end portion of the housing 2 of the set button pin 31. The second pressing portion 5e is provided. As shown in FIG. 5, when the first pressing portion 5d pushes the end portion 41b of the lock spring 41, the convex portion 41d of the lock spring 41 retracts from the pin insertion hole 40. Swing to the state.
Thus, the engaging recess 3b of the mounting pin 3 and the lock spring 4
The engagement with the convex portion 41d of No. 1 is released, and the mounting pin 3 is pushed out to the outside of the housing 2 by the urging force of the coil springs 48b and 48d of the detection switch S.

On the other hand, when the second pressing portion 5e of the slider 5 pushes the end of the set button pin 31 on the inner side of the housing 2, the set button pin 31 moves to the outer side of the housing 2 and the set button pin 31 moves. The engagement between the positioning projection 31d and the engagement recess 30a of the set button pin insertion hole 30 is released. As a result, the return biasing force of the coil spring 44 in the spring accommodating portion 31c causes the set button pin 31 to return to the state before the operating portion 31a is pushed in, and the contact spring 32 is separated from the two terminals on the circuit board. And battery V
To stop energizing each circuit in the housing 2.

The timing at which this energization is stopped is the engagement recess 3b of the mounting pin 3 and the projection 41d of the lock spring 41.
Is slightly delayed from the timing at which the engagement is released and separated, and when the attachment pin 3 is pulled out from the pin insertion hole 40 by the operation of the engagement release key K, the piezoelectric buzzer 21 sounds for a moment. Therefore, the battery check of the battery V can be performed at the same time as this removal operation.

[Other Embodiments] Other embodiments will be listed below. In the above embodiment, the outer shape of the head 3B of the mounting pin 3 is substantially spherical, but as shown in FIG.
14 can be variously modified as long as the shape is such that the falling is promoted when the mounting pin 3 is placed in the upright position with the mounting pin 3 positioned downward. For example, as shown in FIG.
A conical shape as shown in (b) and a curved surface formed at the end opposite to the rod-shaped portion 3A as shown in FIG. 14 (c) may be used. Further, as shown in FIG. 14D, the end opposite to the rod-shaped portion 3A of the quadrangular pyramid shown in FIG. 14A may be chamfered in a planar shape. This is because if the area of the chamfered portion is not so large, the fall is promoted when the mounting pin 3 is placed as described above.

In the above-described embodiment, the mounting pin 3 is composed of a substantially spherical head 3B made of resin and a rod-shaped portion 3A made of metal, and the head 3B is positioned downward so that the mounting pin 3 stands upright. Although it has a center of gravity balance that promotes a fall when it is placed on the head, only the tip of the rod-shaped portion 3A opposite to the head 3B is made of a material having a large specific gravity such as metal or ceramics, or a head made of resin. The center of gravity balance may be achieved by embedding a weight of lead or the like in the end of the portion 3B on the side of the rod-shaped portion 3A and combining it with various outer shapes of the head 3B in the above-mentioned embodiment and the above-mentioned other embodiments.

In the above embodiment, the metal plate 3a of the mounting pin 3 is provided inside the head 3B so as to be attached to the rod-shaped portion 3A. However, as shown in FIG. It may be provided inside 3B in a state of being separated from the end of the rod-shaped portion 3A and intersecting with the axis of the rod-shaped portion 3A.
Further, as shown in FIG. 15B, it may be provided on the end surface of the head portion 3B on the side of the rod-shaped portion 33A.

In the above-mentioned embodiment, the alarm control means G and the alarm means A are housed in the housing 2, but the alarm means A is provided separately from the housing 2 to control the alarm of the housing 2. The alarm means A may issue an alarm when the alarm means A receives the radio wave transmitted from the means G.

In the above-described embodiment, the alarm control means G of the detection tool 1 is configured to activate the alarm means A upon detecting that the mounting pin 3 has been pulled out of the housing 2 and approaching the transmitter O. However, the alarm control means G always transmits a radio wave, and the alarm means A for receiving the radio wave is installed at the entrance / exit of the store, etc., and the detection tool 1 approaches the alarm means A and the radio wave transmitted by the alarm control means G. The alarm means A may be configured to issue an alarm upon receipt of the.

In the above embodiment, the set button pin 3
1 is returned to the state before being pushed by the return biasing force of the coil spring 44, but it may be returned only by pushing the slider 5 without providing the coil spring 44. Further, the elastic force of the positioning convex portion 31d of the set button pin 31 is strengthened to a certain extent so that the positioning convex portion 31d is a casing 2 at a protruding portion corresponding to the outer side edge portion of the casing 2 of the engaging concave portion 30a. You may make it return using the return biasing force of the positioning convex part 31d at the time of passing an outer side slope.

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 according to an embodiment of the present invention.

FIG. 2 is an external view according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of essential parts according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view of a main part according to the embodiment of the present invention.

FIG. 5 is a cross-sectional view of essential parts according to the embodiment of the present invention.

FIG. 6 is an external perspective view of a transmitter according to an embodiment of the present invention.

FIG. 7 is a cross-sectional view of essential parts according to the embodiment of the present invention.

FIG. 8 is an enlarged view of a set button pin according to an embodiment of the present invention.

FIG. 9 is a perspective view of a main part according to the embodiment of the present invention.

FIG. 10 is a cross-sectional view of essential parts according to the embodiment of the present invention.

FIG. 11 is an enlarged view of a slider according to an embodiment of the present invention.

FIG. 12 is an enlarged view of a power supply setting jig according to an embodiment of the present invention.

FIG. 13 is an enlarged view of an engagement releasing key according to the embodiment of the present invention.

FIG. 14 is an external perspective view of a mounting pin according to another embodiment of the present invention.

FIG. 15 is an enlarged view of a mounting pin according to another embodiment of the present invention.

[Explanation of symbols]

 2 case 3 attachment 3A rod-shaped part 3B head 3a metal plate A alarm means G alarm control means

Claims (2)

[Claims] 1. A fitting (3) having a head (3B) having a larger diameter at one end of a rod-shaped portion (3A), and a housing (2) to which the other end of the rod-shaped portion (3A) is connected. ) Is provided, and the housing (2) is provided with alarm control means (G) for activating the alarm means (A) when a preliminary act of theft is performed. The outer shape of the head (3B) of the attachment (3) is the head (3
B) is positioned downward and the fitting (3) is formed in a shape that promotes a fall when the fitting (3) is placed in an upright posture, and the fitting (3) positions the head (3B) downward. Detecting device for an anti-theft device configured to have a center of gravity balance that promotes a fall when the attachment (3) is placed upright. 2. The head (3B) of the fixture (3) is molded of resin, and the inside of the head (3B) or the rod-shaped portion (3).
The detection tool for an anti-theft device according to claim 1, wherein a metal plate (3a) is provided on the end surface on the side A) in a posture intersecting the axis of the rod-shaped portion (3A).