JP2960841B2 - Anti-theft device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a housing and a mounting member having a rod-shaped portion which is inserted and connected to the housing, wherein an alarm output means and the rod-shaped portion are provided in the housing. When the plug-in connection is made, the output of the alarm output unit is stopped, and when the rod-shaped portion is detached from the housing, the output of the alarm output unit is set to the output operation state. The present invention relates to an anti-theft device provided with switch means for controlling the anti-theft.

[0002]

2. Description of the Related Art Such an anti-theft device is used by attaching a bar-shaped portion of a fixture to a housing and connecting it to an anti-theft object such as a product displayed in a store. If this anti-theft device is illegally removed from the anti-theft object by forcibly pulling out the rod-shaped portion of the mounting tool from the housing,
The switch means controls energization to the alarm output means,
The alarm output means is controlled to an output operation state. When the alarm output unit is in the output operation state, the alarm output unit itself issues an alarm such as an alarm sound as an alarm output, or outputs a signal for activating an alarm device provided separately. As a result, the above-mentioned fraudulent acts become apparent, and the theft prevention target is prevented from being stolen.

By the way, the control of the energization of the alarm output means by the switch means is conventionally performed by forming the rod-shaped portion of the mounting member from metal and inserting the rod-shaped portion into the housing to connect the rod-shaped portion to the housing. This has been done by contacting the two electrode terminals provided in the body to short-circuit these electrode terminals, and opening the two electrode terminals as the rod-like portion comes off the housing.

[0004]

Therefore, in the above-described conventional configuration, when the mounting member is attached to the housing, the metal rod connected to the electric circuit inside the housing projects from the housing. In such a state, there is a case where the rod-shaped portion picks up external static electricity and breaks an electric circuit in the housing. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an anti-theft device that suppresses the destruction of an electric circuit in a housing due to external static electricity.

[0005]

According to the present invention, there is provided an anti-theft device comprising a housing and a fitting having a rod-shaped portion which is inserted into and connected to the housing.
The alarm output unit is set to an output stop state when the rod-shaped portion is inserted and connected to the housing, and the alarm output unit is set to an output operation state when the rod-shaped portion is detached from the housing. And switch means for controlling the energization of the alarm output means,
The first characteristic configuration is such that the switch means is pushed and moved as the rod-shaped portion is inserted into and connected to the housing, and enters a stop operation state in which the alarm output means is in an output stop state, and Insulation means for providing a conductive operated part for opening and closing contacts urged back to the output operation state side for setting the alarm output means in the output operation state, and for electrically insulating the operated part from the rod-shaped part Is provided.

In a second characteristic configuration, in the first characteristic configuration, the insulating means is an insulator which is pushed and moved by the rod portion which is inserted and connected to the housing; And the insulator is pushed and moved by the rod-shaped portion, so that the operated portion is pushed to the stop operation state, and the operated portion is moved to the stop operation state. And a spring that allows the insulator to move closer to the operated portion after being moved.

[0007]

According to the first characteristic configuration of the present invention, when the rod-shaped portion of the fixture is inserted and connected to the housing, the conductive operated portion is pushed and moved, and the output of the alarm output means is stopped. The operation is stopped. In this state, the anti-theft device is attached to the anti-theft object, the output of the alarm output unit is stopped, and no alarm is issued. Next, when the rod-shaped portion is forcibly detached from the housing, the conductive operated portion enters an output operation state in which the alarm output unit is set to an output operation state by the return biasing force. The alarm output means in the output operation state outputs an alarm to notify that the anti-theft device has been illegally removed. As described above, the operated part constituting the switch means is pushed and moved as the rod part of the mounting part is inserted into and connected to the housing, but the operated part and the rod part are electrically connected by the insulating means. Even when the rod-shaped part comes into contact with another object charged with static electricity, the static electricity is not transmitted to the operated part.

According to the second characteristic configuration of the present invention, when the rod-shaped portion of the fixture is inserted and connected to the housing, the insulator is pushed and moved by the rod-shaped portion, and the movement of the insulator is covered by the spring. The operation is transmitted to the operation section, and as a result, the operated section is pushed and moved. Although the operated part is pushed and moved to the stop operation state, even after the operated part is in the stop operation state, the spring allows the insulator to still move toward the operated part side. There is room left. Thus, by maintaining the position of the insulator at a position slightly closer to the operated portion than the position at the time when the operated portion enters the stop operation state, the rod-shaped body is slightly moved in the insertion direction. Even if it fluctuates, the operated part can surely maintain the stop operation state.

[0009]

According to the first characteristic configuration, even when the rod-shaped portion comes into contact with another object charged with static electricity, the static electricity is not transmitted to the operated portion. The circuit is not affected by the static electricity, and an anti-theft device has been provided which suppresses the destruction of the electric circuit in the housing by external static electricity. According to the second feature configuration, in addition to the effect of the first feature configuration, even if the rod-shaped portion is slightly swung in the insertion direction, the operated portion can reliably maintain the stop operation state.
The anti-theft device can be operated stably, and the reliability of the anti-theft device can be further improved.

[0010]

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

As shown in FIGS. 2 (b), 3 (b) and 4 (b), the mounting pin 3 has a metal rod 3A and a resin head for holding one end of the rod 3A. 3B,
A disc-shaped metal plate 3a is attached to an end of the rod 3A on the side held by the head 3B so as to be covered by the head 3B and perpendicular to the axis of the rod 3A. Is formed with an engagement concave portion 3b for engaging with the housing 2. The external shape of the head 3B of the mounting pin 3 is substantially spherical as a whole, and the mounting side of the rod-shaped portion 3A is a flat surface. Even when the head 3B is positioned downward and placed in an upright posture, the mounting pin 3 is The tip of the rod-shaped portion 3A does not fall and stand still in an upward posture.

When the housing 2 is attached to a product such as clothing, for example, as shown in FIG. 4 (b), the rod 3A of the mounting pin 3 is connected to the housing 2 through clothing and attached. As shown in FIG. 1, an LED lamp 20, a piezoelectric buzzer 21, a coil L, a capacitor C, a resistor R
And an antenna input circuit 23 that outputs a reception signal when the resonance antenna 22 is in a reception state.
A detection switch S that is turned on and off as the mounting pin 3 is inserted and removed, a mounting pin input circuit 24 that outputs a mounting pin detachment signal when the detection switch S is turned off, and a reception signal from the antenna input circuit 23. A switching circuit 25 that outputs a control signal when a mounting pin detachment signal from the mounting pin input circuit 24 is input, an oscillation circuit 26 that starts pulse oscillation when a control signal from the switching circuit 25 is input, and a switching circuit 25 When the control signal 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 count exceeds the set count. When the count completion signal of the counter 27 is input, the switching circuit 25 A latch circuit 28 for maintaining a state in which a reception signal or the attachment pin detachment signal is input; 27, a buzzer / LED driver 29 for turning on the LED lamp 20 and sounding the piezoelectric buzzer 21 when a count completion signal is input; a battery V for supplying power to each circuit in the housing 2; And a power switch 6 for turning on and off the power supply to the power supply.

In the circuit having the above configuration, when the power supply switch 6 is turned on and operated, the mounting pin 3 is pulled out of the housing 2 and detached, or the detector 1 is installed, for example, on both sides of the entrance of a store. When a pair of panel-shaped transmitters O as shown in FIG. 6 pass, 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 oscillators described above may be set on one side of the doorway, or may be installed on the floor of the doorway.

Hereinafter, in the case described above, the piezoelectric buzzer 21
The process up to the start of sound will be briefly described. First, when the attachment pin 3 is detached from the housing 2 and the detection switch S is turned off from the on state, the attachment pin input circuit 24 outputs an attachment 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 performs pulse oscillation, and 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. Counter 27
Sends a single 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. From the time when the counter completion signal is transmitted, the output stop state in which the output of the alarm is stopped is shifted to the output operation state in which the alarm is output.

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 a 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. Thus, the piezoelectric buzzer 21 and the LED lamp 20 do not operate unless the attachment pin detachment signal is continuously received for a certain period of time, thereby 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 attachment pin detachment signal from the attachment pin input circuit 24. Until the cutting operation is performed, the piezoelectric buzzer 21 emits an intermittent sound in synchronization with the count completion signal of the counter 27, and the LED lamp 20
Continues blinking in synchronization with the count completion signal of the counter 27. When the detector 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 and receives the electromotive force in the switching circuit 25. Output a signal. The operation of each circuit after the switching circuit 25 receives the received signal is the same as the case where the mounting pin 3 is detached, and the description is omitted. Therefore, the LED lamp 20, the piezoelectric buzzer 21, the mounting pin input circuit 24, the switching circuit 25, the transmission circuit 26, the counter 27, the latch circuit 28, and the buzzer / LED driver 29 function as alarm output means A, and the detection switch S It functions as switch means for controlling the energization of the alarm output means A.

Hereinafter, a structure for mounting the mounting pin 3 to the housing 2 will be described. The mounting pin 3 is, as shown in FIGS.
It 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-shaped lock spring 41 that engages with the mounting pin 3 inserted into the pin insertion hole 40 and prevents the pin from coming off.
A detection switch S is provided at a location on the back side of the lock spring 41 in the mounting pin 3 insertion direction.

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 a bent portion 41 c and a spring locking projection 49 projecting from the main body of the jack unit 4.
The end 41 a of the lock spring 41 is fixed to the main body of the jack unit 4. An intermediate portion between the other end 41b and the bent portion 41c of the lock spring 41 includes
As will be described later, a convex portion 41 d that engages with the engaging concave portion 3 b of the mounting pin 3 is provided in the pin insertion hole 40 so as to be able to move back and forth.

As shown in FIG. 7, the detection switch S has a shape in which cylinders of 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 flange 48a, a metal plate 48c holding the other end of the coil spring 48b, and a metal plate 48
c, the coil spring 48 having one end fixed to the surface opposite to the surface holding the end of the coil spring 48b.
and a resin plate 48e that is an insulator that holds the other end of the coil spring 48d and electrically insulates the rod 3A of the mounting pin 3 from the metal plate 48c. Therefore, the resin plate 48e and the coil spring 48d interposed between the resin plate 48e and the metal plate 48c function as insulating means I for electrically insulating the rod 3A from the metal plate 48c. The metal plate 48c has a circular cutout at the center so as not to contact the tapered portion 3c at the tip of the mounting pin 3 inserted into the housing 2, and the resin plate 48e has a tapered tip at the tip of the mounting pin 3. The central portion is cut out in a circular shape to support the portion 3c. The metal plate 48c protrudes through the side wall of the detection switch S, and
Is partially cut away to allow the protruding portion to move in the mounting pin 3 insertion / removal direction.

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. A set button pin insertion hole 30 is provided adjacent to the pin insertion hole 40 and extends through the jack unit 4 in a direction perpendicular to the pin insertion direction of the pin insertion hole 40. A set button pin 31 that is slidable in the set button pin insertion hole 30 is disposed in the set button pin insertion hole 30. A metal contact spring 32 that is pushed by the button pin 31 and swings is provided with one end fixed to the jack unit 4.

As shown in FIG. 8 (a) and FIG. 8 (b) showing a cross section taken along the line EE in FIG. 8 (b), the set button pin 31 is operated from outside the housing 2 to be operated.
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 pressed, and returning and urging the set button pin 31 in a direction opposite to the set button pin 31 insertion direction. And a spring storage portion 31c for storing the coil spring 44.
As shown in FIG. 9, the spring storage portion 31c is formed in a box shape having one open side, and the set button pin is inserted into a space formed by the spring storage portion 31c and the inner wall of the set button pin insertion hole 30. A protruding portion 43 is formed so as to protrude from the inner wall of the insertion hole 30. Also, a box-shaped spring storage portion 31
On the bottom of c, two engaging portions 31e and 31f are formed, which are arranged in the sliding direction of the set button pin 31, for engaging with a tip portion of a movement preventing spring 47 described later.

The coil spring 44 is provided in the spring housing 31.
c, between the inner wall on the outer side of the housing 2 and the protruding 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 projection 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 protrude and retreat in the protruding direction, and the set button pin 31 is pushed inward of the housing 2. An engagement recess 30a that engages with the positioning projection 31d is provided on the inner wall of the set button pin insertion hole 30.

When the set button pin 31 is pushed inward of the housing 2, the
The inner end contacts the contact spring 32 and swings the contact spring 32. Due to this swing, the free end of the contact spring 32 comes into contact with the circuit board, and FIG.
As shown in (2), the two electrode terminals 6a and 6b formed on the circuit board are short-circuited. As a result, electricity is supplied from the battery V to each circuit in the housing 2, 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 for inserting a later-described key K for disengaging the mounting pin 3 is provided at a position opposite to the pin insertion hole 40 of the set button pin insertion hole 30.
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 preventing spring 47 for preventing movement of the set button pin 31 is provided.

The pinion gear 46 is rotatably supported by the main body of the jack unit 4 in a direction in which its teeth extend perpendicular to the direction of insertion of the disengaging key K. The other part of the projection is a jack unit 4
In the state of protruding outside. 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. 3 (a), and when the key K for disengagement is not inserted into the key insertion port 45, It is located on one side so as not to mesh with a rack portion 5a of the slider 5 described later.

The movement preventing spring 47 is formed by a thin metal rod so as to be elastically deformable. One end of the spring 47 is fixed to one side near the opening of the key insertion hole 45 so as to be able to swing by elastic deformation. The free end of the movement preventing spring 47 is pressed by one of the engaging portions 31 e and 31 f of the set button pin 31 and the elastic action of the movement preventing spring 47 in accordance with the position of the set button pin 31 in the sliding direction. The set button pin 3 by the urging force of the coil spring 44.
1 prevents sliding movement to the outside of the housing 2.
FIG. 20 shows a state in which it is engaged with the engaging portion 31f. An intermediate portion between the base end and the free end of the movement preventing spring 47 is in a state of crossing the key insertion hole 45.

FIG. 11 (a) is provided with a rack portion 5a which meshes with the pinion gear 46 of the jack unit 4 in the state shown in FIG.
And a slider 5 shown in FIG. The base 5b of the slider 5 is slidably engaged with a guide (not shown) provided on the inner wall of the housing 2 in a direction indicated by an arrow P in FIGS. It can slide freely in the insertion and removal direction,
Further, a distal end portion of an elastically deformable extending portion 5c extending from an intermediate portion between the rack portion 5a and the base portion 5b is locked to the housing 2 side. It is urged to return to the inside of the body. In FIGS. 3 to 5, the extension portion 5c is omitted to make the drawings easy to see.

Next, a description will be given of the engagement and disengagement of the mounting pin 3 with the housing 2 and the switching of the energization of the battery V to each circuit in the housing 2. First, when the mounting pin 3 and the housing 2 are engaged, the mounting pin 3 shown in FIG.
From the disengaged state, the mounting pin 3 is passed through the clothing F or the like 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. Coil spring 48 provided in pin insertion hole 40 with mounting pin 3
When the insertion is performed against the biasing force of the coil spring 48b, the projection 41d projecting into the pin insertion hole 40 of the lock spring 41 is engaged with the engagement recess 3b of the mounting pin 3.
The mounting pins 3 are prevented from moving in the release direction by the urging forces b and 48d, and the engagement state is maintained.

During the insertion process until the engaging concave portion 3b of the mounting pin 3 engages with the convex portion 41d of the lock spring 41, the tapered 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 urging force of the b and 48d, the metal plate 48c moves to the inside of the housing 2 and the two divided electrodes formed on the mounting surface 4a of the detection switch S. The terminals 4b and 4c are contacted and short-circuited. Thus, the metal plate 48c is in the stop operation state in which the output of the alarm output unit A is stopped. Therefore, the metal plate 48c is an operated portion for opening and closing the contact of the detection switch S. When the metal plate 48c short-circuits the two divided electrode terminals 4b and 4c, the coil spring 48d still has a margin to shrink, so that the resin plate 48e is allowed to move closer to the metal plate 48c. Then, the mounting pin 3 is inserted and the mounting pin 3 and the lock spring 41 are engaged. With this, the attachment of the detector 1 to the product is completed, and then the detector 1 is started to operate.

In order to start the operation of the detector 1, FIG.
This is performed by using a power supply setting jig D as shown in FIGS. The operated portion 31a of the set button pin 31 of the jack unit 4 by the protruding pin D1 of the power setting jig D
Is pushed inward, the end 31g of the set button pin 31 on the inner side of the housing 2 comes into contact with the contact spring 32 and swings the contact spring 32. This swing causes the free end of the contact spring 32 to come into contact with the circuit board, thereby short-circuiting the two electrode terminals 6a and 6b on the circuit board. As a result, the power supply from the battery V to each circuit in the housing 2 is started. In the state where the set button pin 31 is not pushed in, the operated portion 31a which is the outer end of the set button pin 31 on the outer side of the housing 2 is set in the set button pin insertion hole 30.
A positioning step portion 30b abutting on an end of the spring storage portion 31c on the positioning portion 31b side is formed on the inner wall of the set button pin insertion hole 30 so as to be located at a position slightly immersed from the opening on the outer side of the housing 2. Is formed.

When the set button pin 31 is depressed, the free end of the movement preventing spring 47 is engaged with the engaging portion 31e of the set button pin 31 as shown in FIG. As shown in the figure, the state is switched to a state of engaging with the engaging portion 31f of the set button pin 31. At the position where the set button pin 31 swings the free end of the contact spring 32 toward the circuit board, 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 sliding movement of the set button pin 31 is prevented by the engagement of the distal end of the movement preventing spring 47 on the free end side with the engaging portion 31f of the set button pin 31, as described above. 31 positioning projections 3
1d and recess 30a for engagement between set button pin insertion hole 30
Also prevents the set button pin 31 from sliding. When the mounting pin 3 is forcibly pulled out while the power switch 6 is turned on as described above, the metal plate 48c is separated from the electrode terminals 4b, 4c by the return biasing force of the coil spring 48b, and an alarm output is issued. An output operation state is set in which the means A is set to an output operation state for outputting an alarm.

Next, in order to release the engagement between the mounting pin 3 and the jack unit 4 without changing the alarm output means A from the state shown in FIG. Key K is used. The key K for disengaging includes a rack portion K1 that meshes with the pinion gear 46 of the jack unit 4. When the rack portion K1 is inserted into the key insertion hole 45 in the state shown in FIG. Lift the rack part 5 of the slider 5
a, the rack portion K1 and the pinion gear 46 mesh with each other, and the pinion gear 46 rotates with the insertion of the rack portion K1. By the rotation of the pinion gear 46, the slider 5 provided with the rack portion 5a that meshes with the pinion gear 46 moves from the position indicated by the dashed line to the position indicated by the solid line in FIG. In FIG. 10, the position of the pinion gear 46 indicates the position when the pinion gear 46 is lifted by the rack portion K1. Further, when the rack portion K1 of the disengagement key K is inserted into the key insertion hole 45, the movement preventing spring 4 provided so as to cross the key insertion hole 45 is provided.
7, the movement preventing spring 47 is pressed against the wall of the key insertion hole 45. As a result, the free end of the movement preventing spring 47 swings, and the engagement between the free end and the engaging portion 31f of the set button pin 31 is released.

The slider 5 has a first holding portion 5d which comes into contact with the end 41b of the lock spring 41 with the sliding movement of the slider 5 and an inner end of the set button pin 31 on the inner side of the housing 2. A second pressing portion 5e is provided. When the first pressing portion 5d presses the end portion 41b of the lock spring 41, the convex portion 41d of the lock spring 41 withdraws from the pin insertion hole 40 as shown in FIG. Rocking to the state.
Thus, the engagement recess 3b of the mounting pin 3 and the lock spring 4
The engagement of the first projection 41d with the first projection 41d is released, and the mounting pin 3 is pushed out 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 presses the inner end of the set button pin 31 on the inner side of the casing 2, the set button pin 31 moves to the outer side of the casing 2, and the set button pin 31 is moved. 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 set button pin 31 returns to the state before the operation section 31a is pushed in by the return biasing force of the coil spring 44 in the spring storage section 31c, and the contact spring 32 separates from the two terminals on the circuit board. And battery V
Then, the power supply to each circuit in the housing 2 is stopped.

The timing at which the energization is stopped is determined by the engagement recess 3b of the mounting pin 3 and the projection 41d of the lock spring 41.
When the attachment pin 3 is pulled out of the pin insertion hole 40 by operating the disengagement 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 the removal operation.

[Other Embodiments] Other embodiments will be listed below. In the above embodiment, the alarm output means A directly emits sound or light as an alarm. However, another device that emits a signal by radio waves as an alarm and receives the transmitted radio waves to emit sound or light, etc. It may be provided and configured.

In the above embodiment, the switch means S
Resin plate 48e pushed by rod portion 3A of mounting pin 3
Although the coil spring 48d is interposed between the metal plate 48c and the metal plate 48c, the resin plate 48e is allowed to approach the metal plate 48c even after the metal plate 48c is in the stop operation state. The metal plate 48c has elasticity, and is formed into a thin plate shape bent into an appropriate shape convex toward the mounting pin 3 side.
The resin plate 48e may be configured to directly push the metal plate 48c. Even in this case, even after the metal plate 48c is in the stop operation state, it is possible to allow the resin plate 48e to approach and move toward the metal plate 48c. it can.

In the above embodiment, the insulating means I includes the resin plate 48e and the coil spring 48d, and makes the rod-shaped portion 3A of the mounting pin 3 and the metal plate 48c electrically insulated by the resin plate 48e as an insulator. But the bar 3
A or an insulating film may be applied to the surface of the metal plate 48c on the side of the mounting pin 3 so as to be in an electrically insulated state. Further, the rod-shaped portion 3A itself may be made of an insulator to be in an electrically insulated state.

In the above embodiment, the resin plate 48 e, which is an insulator, has a plate shape, but may be variously changed such as a column shape. Further, a ceramic plate or the like may be used as an insulator instead of the resin plate 48e.

In the above embodiment, the detection switch S
Although a so-called normally-open type switch is configured, it may be configured as a so-called normally-closed switch that switches from an on-state to an off-state by pressing the mounting pin 3.

In the above embodiment, the metal plate 48 c is used as the operated portion of the switch means S.
Conductive rubber or the like may be used instead of c.

In the above-described embodiment, the case where the detector 1 is attached to the anti-theft object with the attachment pin 3 having one rod-shaped portion 3A is illustrated, but the rod-shaped portions inserted and connected to the housing are provided at both ends. The present invention can be similarly applied to a case where the detection tool 1 is attached to the anti-theft object by the provided wire-shaped member.

Incidentally, reference numerals are written in the claims for convenience of comparison with the drawings, but the present invention is not limited to the structure of the attached drawings by the entry.

[Brief description of the 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 sectional view of a main part according to the embodiment of the present invention.

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

FIG. 5 is a sectional view of a main part according to the embodiment of the present invention.

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

FIG. 7 is a sectional view of a main part according to an embodiment of the present invention.

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

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

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

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

[Explanation of symbols]

 2 housing 3 mounting fixture 3A rod-shaped part 48c operated part 48d spring 48e insulator A alarm output means I insulation means S switch means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G08B 13/00-15/02 H01H 13/52

Claims (2)

(57) [Claims] 1. A housing (2) and a fixture (3) having a rod-shaped portion (3A) to be inserted and connected thereto are provided, and an alarm output means (A) is provided in the housing (2). And when the rod-shaped portion (3A) is inserted and connected to the housing (2), the output of the alarm output means (A) is stopped, and
A switch means (A) for controlling energization of the alarm output means (A) so that the alarm output means (A) is set to an output operation state when the rod-shaped part (3A) is detached from the housing (2). S), wherein the switch means (S) is pushed and moved as the rod-shaped portion (3A) is inserted into and connected to the housing (2), and the alarm is issued. A conductive operation for contact opening / closing, which is brought into a stop operation state in which the output means (A) is in the output stop state, and which is biased to return to the output operation state in which the alarm output means (A) is in the output operation state. An anti-theft device comprising a portion (48c), and an insulating means (I) for electrically insulating the operated portion (48c) from the rod-shaped portion (3A). 2. The insulating means (I) is provided in the housing (2).
An insulator (48e) pushed and moved by the rod-shaped portion (3A) inserted and connected to the insulator (48A), and the insulator (48e) interposed between the insulator (48e) and the operated portion (48c). 48e) is pushed and moved by the rod-shaped part (3A), and the operated part (48c) is pushed and moved to the stop operation state, and the operated part (48c) is brought to the stop operation state. The anti-theft device according to claim 1, further comprising a spring (48d) that allows the insulator (48e) to move closer to the operated portion (48c) after being moved.