JP3081457B2 - 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 housing attached to an object to be stolen and provided with a preliminary act detecting means for detecting a preliminary act of theft. Alarm output means for outputting alarm information based on the detection information, holding means for holding the alarm output means in an operating state, and alarm release means for stopping the operation of the alarm output means; An insertion hole for a release operation is formed from the outer peripheral portion of the housing toward the inside of the housing, and the alarm release means is operated to an alarm release operation state by a rod-shaped release operation tool inserted into the insertion hole. The invention relates to a configured anti-theft device.

[0002]

2. Description of the Related Art Such an anti-theft device is used by being attached to an anti-theft object such as a product displayed in a store, for example, and the casing of the anti-theft device is illegally removed from the anti-theft object, or If a preliminary theft action is performed, such as an unauthorized removal of an anti-theft object with the anti-theft device housing attached to the outside of the store, this is detected and the alarm output means outputs the alarm information. A warning is issued to a store employee or the like that the above-mentioned preliminary act of theft has been performed, thereby preventing loss due to theft.

On the other hand, when the anti-theft object is sold properly and reaches the buyer, it is necessary to remove the anti-theft device from the anti-theft object. Need to be stopped. An alarm release means is provided to stop the operation of the alarm output means, and the alarm release means is activated by inserting a rod-shaped release operation tool into an insertion hole formed in the housing of the anti-theft device. To stop the operation of the alarm output means, and remove the anti-theft device from the anti-theft object.

Further, when the anti-theft device is used by being attached to an anti-theft object, the alarm output means is held in an operating state by a holding means based on a start command. In this case, the alarm output means is reliably maintained in the operating state in the use state while maintaining the non-operating state to save power.

[0005] As the conventional holding means, there is the following. For example, Japanese Patent Application Hei 5-
As shown in JP-A-215886, a switch for turning on and off the power supply to the alarm output means is provided, and the switch is turned on by an operated tool that slides with the attachment of the mounting tool to the anti-theft object, A locking mechanism consisting of a spring wire rod is automatically locked to the locking piece of the operated tool as the slide moves, and a locking and holding mechanism is configured to hold the operated tool at the switch-on position against the biasing force of the spring. The holding means is constituted by the locking and holding mechanism.

[0006]

However, in the above-mentioned conventional structure, the alarm output means is held in the operating state by the above-mentioned locking and holding mechanism.
When vibration or the like is applied, the locked state is released, or when the holding operation and the releasing operation are performed a number of times, wear occurs and the holding function becomes unreliable. Therefore, in order to improve the holding function, it is conceivable to improve the structure of the locking mechanism to a structure capable of exhibiting a more reliable holding function. However, such an improvement complicates the structure and increases the size of the entire device. Disadvantageously.

Further, in the above-mentioned conventional configuration, a bar-shaped false operation tool similar to the release operation tool is illegally inserted from the insertion hole for the release operation, and the locking state of the locking mechanism is relatively easy. There is a possibility that the alarm output means may be released and the operation of the alarm output means may be stopped. In this respect, there is room for improvement. The present invention has been made in view of the above circumstances, and has a first aspect.
It is an object of the present invention to provide an anti-theft device capable of reliably holding an alarm output unit in an operating state without increasing the size of the device. A second object is to make it difficult to improperly stop the alarm output means by using a fake operation tool other than the normal release operation tool.

[0008]

The features of the first invention are as follows.
A housing attached to the anti-theft object is provided with preliminary act detection means for detecting a preliminary act of theft, and outputs alarm information to the inside of the housing based on the detection information of the preliminary act detection means. Alarm output means, holding means for holding the alarm output means in the operating state, and alarm release means for stopping the operation of the alarm output means are provided, and are released from the outer peripheral portion of the housing toward the inside of the housing. An anti-theft device, wherein an insertion hole for operation is formed, and the alarm release means is configured to be operated in an alarm release operation state by a rod-shaped release operation tool inserted into the insertion hole. The means is constituted by an electric holding circuit which is set to a holding state based on a start command, and the alarm canceling means is a conductive unit.
With is operated by the release operation member provided, is constituted by the holding release command switch for commanding holding release in an electric signal to the electric storage circuit, the hold releasing instruction scan
The switch is in front of the release operation tool inserted into the insertion hole.
A pair of electrodes operated to be energized by contact of the conductive part
The point is that it is constituted by the air contact portion .

[0009]

A feature of the second aspect of the present invention is to specify a configuration suitable for implementing the first aspect of the present invention , wherein each of the electrical contact portions is projected from a contact surface of each of the electrical contact portions. ,
A non-conductive partition is provided, and the release operation tool includes:
The present invention is characterized in that a concave portion is formed which engages with the partition portion in a state where the conductive portion is allowed to contact each of the electrical contact portions.

[0013] The characteristic structure of the third invention is the first or second invention.
A intended to identify preferred configuration for exemplary, the preliminary action detection means, a fixture connected to the housing for attaching the housing to the theft prevention object, the housing of the fixture A switch for electrically detecting attachment / detachment to / from the body, wherein the holding means is configured to be set to a holding state based on a mounting detection signal of the attachment / detachment detection switch, The alarm output means is configured to output alarm information based on a detachment detection signal of the detachment detection switch.

[0012] The characteristic structure of the fourth invention is the first, second or second aspect.
(3) A configuration suitable for implementing the invention , wherein the preliminary action detecting means includes an antenna provided in the housing and receiving a radio wave from a transmitter installed at a specific location. The alarm output means is configured to output alarm information based on a signal received by the antenna.

A fifth aspect of the present invention is the third or fourth aspect of the present invention.
A lock means for locking the mounting tool in a state of being attached to the housing, and the locking means is provided with the release operation tool inserted into the insertion hole. Is configured to be operated in the unlocked state.

[0014]

According to the characteristic structure of the first invention, when the electric holding circuit is set to the holding state based on the start command, the alarm output means is held in the operating state. Then, when canceling the alarm operation, as the regular canceling operation tool is inserted into the insertion hole, the electric holding circuit is instructed to hold by an electric signal by the holding cancel command switch to the electric holding circuit,
The electric holding circuit is in the holding release state, and the operation of the alarm output means is stopped. As described above, since the holding means for holding the alarm output means in the operating state is constituted by the electric holding circuit, it can be completed in a small space, so that the whole apparatus can be made compact and vibration and the like can be reduced. Therefore, there is no disadvantage that the release state is easily released, and the holding function is lowered by a large number of release operations.

Further , when the release operation tool is inserted into the insertion hole, the conductive portion provided on the release operation tool comes into contact with a pair of electric contact portions constituting the holding release command switch, and each of the electric contact portions is released.
The contact portion is operated in the energized state, and the alarm operation holding state is released.

According to the characteristic configuration of the second invention, the following operation is obtained in addition to the operation of the characteristic configuration of the first invention . When the proper release operation tool is inserted into the insertion hole, the recess formed in the release operation tool engages with the partition provided in a protruding state between the respective electric contact portions, and the conductive portion is connected to each of the electric release portions. It can be inserted so as to contact the contact portion. And since the partition part is provided in the projecting state between each electric contact part, even if it inserts a flat metal body etc., each electric contact part cannot be easily made into a conduction state.

According to the characteristic configuration of the third invention, the first or the first
There are the following operations in addition to the operations according to the features of the two inventions .
When the fixture is attached to the housing to attach the housing to the anti-theft object, the attachment is electrically detected by the attachment / detachment detection switch, and the attachment / detachment detection switch is attached to the electric holding circuit. Outputs a detection signal. Then, the electric holding circuit is set to the holding state based on the attachment detection signal. And, if the attachment is detached from the housing illegally,
The alarm output means outputs an alarm state based on the detachment detection signal from the attachment / detachment detection switch.

According to the characteristic configuration of the fourth invention, the first and the second
Alternatively, there is the following effect in addition to the effect of the characteristic configuration of the third invention . In the state where the anti-theft device is attached to the anti-theft object, for example, if the device is illegally carried near a specific location such as a store entrance, a radio wave transmitted from a transmitter installed at the specific location will The signal is received by an antenna provided in the housing, and the alarm output means outputs alarm information based on a signal received by the antenna.

According to the characteristic configuration of the fifth invention, the third or the third
The following operations are provided in addition to the operations according to the features of the four inventions .
Since the mounting device is locked by the locking device in a state where the mounting device is mounted on the housing, there is no disadvantage that the mounting state is inadvertently released due to vibration or the like, and the alarm output unit outputs alarm information, or the like. When the fixture is to be removed normally, the lock of the fixture is released by inserting the release operation tool into the insertion hole and operating the alarm release means in the alarm release operation state.

[0020]

According to the characteristic structure of the first invention, while the whole device can be housed in a compact shape, the holding means for holding the alarm output means in the operating state,
It has been possible to provide an anti-theft device capable of exerting a reliable holding function.

[0021] Further, by making the state electrically conductive through the conductive portion provided in the release operation tool , the holding release state,
That is, since the alarm output unit is set to the operation stop state, the holding release is performed even when a non-conductive material such as a resin material or a piece of wood that is easily deformed is used as a false operation tool. The alarm operation is not canceled by such an illegal operation.

According to the characteristic structure of the second invention, the first invention
There are the following effects in addition to the effects of the feature configuration . When the regular release operation tool is inserted, it can be easily released from the holding state, and even if a metal plate or the like is inserted to make the holding release state illegal, it cannot be released. Theft due to wrongdoing can be prevented.

According to the characteristic configuration of the third invention, the first or the first
There are the following effects in addition to the effects obtained by the features of the two inventions .
The attachment / detachment detection switch constituting the preparatory action detection means is configured to be also used as the command means for instructing the holding means to be activated to the holding state, so that the dedicated command means for instructing the activation to the holding state becomes unnecessary. Also, no special operation for starting is required.

According to the characteristic configuration of the fourth invention, the first and the second
Alternatively, the following effect is obtained in addition to the effect of the characteristic configuration of the third invention . In a state where the anti-theft device is attached to the anti-theft object, for example, it is possible to prevent improper behavior such as being illegally carried out of the store.

According to the characteristic configuration of the fifth invention, the third or the third
The following effects are obtained in addition to the effects obtained by the features of the four inventions .
There is no disadvantage that the anti-theft device is easily detached from the anti-theft object, and the release operation device for operating the alarm release means in the alarm release operation state also serves as the lock release device. No lock release means is required.

[0026]

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. 1 (a) and FIG.
As shown in the side view of (b), the sensor tag 1 as an anti-theft device has a rectangular parallelepiped housing 2 and a wire unit having a function as an attachment for attaching the housing 2 to a product or the like to be anti-theft object. 3 Wire unit 3
As shown in FIG. 3, lock pins 30 provided at both ends for insertion into and removal from the housing 2, wires 31 connecting the lock pins 30, and a part of the wires 31 and the lock pins 30. And a jacket 32 for covering the.

The lock pin 30 and the wire 31 are made of metal and have conductivity, and the lock pins 30 at both ends are also electrically connected. In the vicinity of the tip of the lock pin 30,
An engagement recess 30a is formed to prevent the lock pin 30 from coming off the housing 2. When the lock pin 30 is inserted into the housing 2, the end of the jacket 32 covering the lock pin 30 is immersed in the housing 2 as shown in FIG. It is not exposed to. Thus, it is possible to prevent the lock pin 30 from contacting another object charged with static electricity and damaging the electric circuit in the housing 2.

As shown in FIG. 2, L
An ED lamp 20, a piezoelectric buzzer 21, a resonance antenna 22 including a coil and a capacitor, and a resonance antenna 22
Is in a reception state, an antenna input circuit 23 that outputs a reception signal, a wire input circuit 24 that outputs a wire cutting signal when the wire unit 3 is not properly connected, and a reception signal from the antenna input circuit 23 A switching circuit 25 that outputs a control signal when a wire cutting signal is input from a wire input circuit 24; an oscillation circuit 26 that starts pulse oscillation when a control signal is input from the switching circuit 25; When a 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 a set count. When the count completion signal of the counter 27 is input, the switching circuit 25 outputs the received signal. Or a latch circuit 2 for maintaining a state in which the wire cutting signal is inputted. When the count completion signal of the counter 27 is input with the buzzer · LED driver 29 which Naraseru the LED lamp 20 is lighted and the piezoelectric buzzer 21,
A battery V that supplies power to each circuit in the housing 2 and a negative electrode of the battery V and a ground of each circuit are connected to each other as the wire unit 3 is inserted into the housing 1 to connect each battery to each circuit. And a power holding circuit VK as an electric holding circuit that constitutes holding means for maintaining the power supply until the reset switch R is not closed after the power supply is started. ing.

As shown in FIG. 17, the power supply holding circuit VK is a MOSFET type switching transistor TR1, which switches between a state in which the negative electrode of the battery V and the ground of each circuit are connected and a state in which the connection is cut off. It is configured to include a start-up transistor TR2 and the like for making the transistor TR1 conductive when the wire unit 3 is inserted.

The circuit having the above-mentioned structure is used when the wire unit 3 is cut off when the housing 2 is attached to a product or the like to be stolen by the wire unit 3, or when the sensor tag 1 is connected to, for example, a doorway of a store. The piezoelectric buzzer 21 housed in the housing 2 sounds when a pair of panel-shaped transmitters O as shown in FIG. Have been. As the oscillator O, one of the pair of panel-shaped oscillators may be installed 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, in a state where the wire unit 3 is not attached to the housing 2 (unused state), the power supply holding circuit VK does not supply power to other circuits. That is, since the base b and the emitter e of the starting transistor TR2 have the same potential and are turned off, the switching transistor TR1 is also turned off, and the negative electrode of the battery V and the ground of each circuit are cut off. When the wire unit 3 is attached to the housing 2, the starting transistor TR
2 is connected to the negative electrode of the battery V, the starting transistor TR2 is turned on, and at the same time, the switching transistor TR1 is also turned on, and power supply to each circuit is started. In this state, the input side terminal of the wire input circuit 24 is connected to the negative electrode side of the battery via the wire unit 3 and is maintained at the ground potential.

When the wire unit 3 is disconnected from the housing 2 due to, for example, disconnection of the wire unit 3, the input terminal of the wire input circuit 24 is connected to the battery V via the resistor Rb. Rises from the ground potential. Wire input circuit 24
Detects that the wire unit 3 has been disconnected when the input terminal of the wire input circuit 24 reaches a set potential or higher. At this time, a current flows from the resistor Rb through the input side terminal of the wire input circuit 24 and the ground line L1, and a predetermined voltage is generated at both ends of the resistor Rb. Is maintained. Therefore, the power holding circuit VK is configured to maintain the power holding state after the wire unit 3 is attached to the housing 2 and once activated, unless the reset switch R is turned on.

When the reset switch R is turned on, the base b of the start-up transistor TR2 is connected to the positive electrode of the battery V, and the start-up transistor TR2 is forcibly turned off, and at the same time, the switching transistor TR1 is turned off. Is shut off. Therefore, the reset switch R functions as a holding release command switch that commands the power holding circuit VK to release holding by an electric signal.

When the wire input circuit 24 detects a disconnection of the wire unit 3 or the like, it outputs a wire disconnection signal to the switching circuit 25. The input side of the wire input circuit 24 is connected to the ground via a delay capacitor C2, and the contact between the wire unit 3 and the circuit in the housing 2 is intermittent due to vibration applied to the wire unit 3. However, it is possible to prevent the potential on the input side of the wire input circuit 24 from rising rapidly, thereby preventing the wire input circuit 24 from malfunctioning even though the wire unit 3 is not disconnected. ing.

The switching circuit 25 sends a control signal to the oscillating circuit 26 and the counter 27 while receiving the wire cutting signal. While receiving the control signal, the oscillating circuit 26 performs pulse oscillation and the counter 27 oscillates. The number of oscillation pulses of the circuit 26 is counted. Then, when the control signal stops, the oscillation circuit 26 stops the pulse oscillation, the counter 27 stops counting, and resets the pulse count. Each time the counter 27 completes counting the preset number of pulses, the latch circuit 26 and the buzzer / LE
One pulse signal is sent to the D driver 29 as a count completion signal.

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 28 receives the count completion signal of the counter 27, and maintains the switching circuit 25 in the state of receiving the disconnection signal, whereby the switching circuit 25 continues to send control signals 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 disconnection signal. This allows
The piezoelectric buzzer 21 and the LED lamp 20 do not operate unless the disconnection signal is continuously received for a certain period of time, thereby preventing malfunction due to noise or the like.

After the counter 27 once sends out the count completion signal, the switching circuit 25 continues to send the control signal regardless of the presence or absence of the disconnection signal from the wire input circuit 24. Therefore, the reset switch R is closed. Until the piezoelectric buzzer 21 emits an intermittent sound in synchronization with the count completion signal of the counter 27, the LED lamp 20 keeps blinking in synchronization with the count completion signal of the counter 27.
When an alarm is given by the LED lamp 20 and the piezoelectric buzzer 21 as described above, the impact is applied to the housing 2 so that the positive electrode or the negative electrode of the battery V is momentarily released from the connection terminal. In such a case, a power supply capacitor C1 for supplementarily supplying a current is provided in parallel with the battery V in order to prevent the circuit in the housing 2 from being reset and the alarm from being stopped. I have.

When the sensor tag 1 passes through the place where the transmitter O is installed, the resonance antenna 22 generates an electromotive force due to the radio wave from the transmitter O, and the antenna input circuit 23 detects the electromotive force and switches the switching circuit 25. To output the received signal. The operation of each circuit after the switching circuit 25 receives the received signal is the same as the case where the wire unit 3 is disconnected, and the description is omitted.

Accordingly, the resonance antenna 22, the antenna input circuit 23, the circuit for connecting the wire input circuit 24 to the wire unit 3, and the like can be used to cut the wire unit 3 to illegally remove the sensor tag 1 from an object to be stolen, 1 functions as a preparatory act detection means SD for detecting a preparatory act of theft trying to take the anti-theft object having the anti-theft object out of the store illegally, and includes a switching circuit 25, an oscillation circuit 26, a counter 27, a latch circuit 28, a buzzer・ L
ED driver 29, LED lamp 20, and piezoelectric buzzer 2
1 functions as alarm output means AO which outputs alarm information by light and sound based on the detection information of the preliminary action detection means SD.

Next, a structure for attaching the wire unit 3 to the housing 2 will be described. As shown in FIGS. 3 to 7, the wire unit 3 has a lock pin 30 of the wire unit 3.
Is a jack unit 4 provided in contact with the inner wall of the housing 2.
It is attached to the housing 2 while being inserted into the two lock pin insertion holes 40a and 40b. The jack unit 4 has a lock pin 3 inserted into the lock pin insertion hole 40a.
A hook-shaped lock spring 41 that engages with the lock 0 to prevent it from falling off;
A hook-shaped lock spring 42 that engages with the lock pin 30 inserted in the lock pin insertion hole 40b to prevent the lock pin 30 from coming off is provided side by side.

Lock springs 41 and 42 as locking means
Are locked at their bent portions 41c, 42c by spring locking projections 49 protruding from the main body of the jack unit 4. Bent portions 41 of lock springs 41 and 42
At the intermediate portion between the bent portions 41c and 42c and the end portions 41b and 42b farther from the c and 42c, a convex portion 41 that engages with the engaging concave portion 30a of the lock pin 30 as described later.
a, 42a are provided in the lock pin insertion holes 40a, 40b in such a manner as to be able to retreat.

Further, since the lock springs 41 and 42 are made of metal and formed in a hook shape, the lock springs 41 and 42 have elasticity in a direction in which both ends approach or separate from each other. As shown in FIG. 3, the convex portions 41a,
42a is in a state of protruding almost to the center of the lock pin insertion holes 40a and 40b. Therefore, the lock pin 30
When the engaging concave portions 30a and the convex portions 41a and 42a engage with each other, the convex portions 41a and 42a are locked by the lock pin insertion holes 40a and 40a.
The lock springs 41 and 42 are urged toward the side of engagement with the lock pin 30 by being pushed in the direction of withdrawing from the 40b.

The lock pin insertion holes 40a and 40b are closed on the rear side, and a metal coil spring 4 having one end fixed to the rear end of the lock pin insertion holes 40a and 40b.
4a and 44b are provided respectively. The metal coil springs 44a and 44b are provided with lock pin insertion holes 40a and
The lock pin 30 inserted into the 40b is urged toward the release side, and is in contact with metal conductive terminals 48a and 48b at the fixed end.

As shown in FIG. 9, one end of the conduction terminal 48b protrudes into the rear end of the lock pin insertion hole 40b and comes into contact with the coil spring 44b, and the other end is shown in FIG. It is in contact with the electrode surface 6a formed on the circuit board 6 constituting the circuit. The conductive terminal 48a has substantially the same configuration as the conductive terminal 48b, although the connection position to the circuit board 6 is different. Thus, the lock pin 30 inserted into the lock pin insertion holes 40a, 40b is electrically connected to the circuit shown in FIG. 2 via the coil springs 44a, 44b and the conduction terminals 48a, 48b. That is, each lock pin 30
When the wire unit 3 is mounted on the housing, the coil springs 44a and 44b connect the base of the starting transistor TR2 and the negative electrode of the battery via the wire 31 and the conduction terminals 48a and 48b, as described above. A switch SW to be connected is configured, and this switch SW
Constitutes a detachment detection switch for electrically detecting the attachment and detachment of the wire unit 3 to and from the housing, and also constitutes a part of the preliminary action detection means.

A key insertion hole 45, which is an insertion hole for a release operation, is formed in a portion of the lock pin insertion hole 40a opposite to the lock pin insertion hole 40b from the outer surface of the housing 2 toward the inside of the housing. The key insertion hole 45 is provided with a rack portion 63 of an engagement release key K as a release operation tool described later.
Is inserted. As shown in FIG. 10 and FIG. 11, which is a partial cross-sectional view taken along the line PP ′ in FIG. 10, and FIG. 12 in which the key insertion hole 45 is viewed from the outside, the key K The pinion gear 46 which is rotated in accordance with the insertion of the rack portion 63 into the key insertion hole 45, and a pair of reset terminals 47a, 47b (an example of an electrical contact portion) which are a part of the reset switch R shown in FIG. ) Are provided, and two shielding walls 45a and 45b, which are protrusions protruding inward from the side wall of the key insertion hole 45, are provided at different positions in the longitudinal direction of the key insertion hole 45 on the entrance side and the rear side. Is formed.

The pinion gear 46 is rotatably supported by the body of the jack unit 4 so that the direction in which the teeth extend is perpendicular to the direction in which the rack portion 63 of the disengaging key K is inserted. 3 to 7, it is supported so as to be able to move a little in a direction perpendicular to the paper surface.
In a state where the rack portion 63 of the disengaging key K is not inserted in the key 5, as shown in FIG. 10, it is located inside the key insertion opening 45 and does not mesh with a rack portion 5 a of the slider 5 described later. And the rack portion 6 of the key K for disengaging
In a state in which the rack unit 3 is inserted, the rack unit 63 is pushed up by the rack unit 63, and a part of the rack unit 63 projects to the outside of the jack unit 4 and meshes with the rack unit 5 a of the slider 5.

A pair of reset terminals 47a, 47
b is provided on both sides of the rear shielding wall 45b of the two shielding walls 45a and 45b so as to be exposed in the key insertion hole 45, and as shown in FIG. 2 are connected to the circuit shown in FIG. 2 by contacting the electrode surfaces 6b formed on the circuit board 6 at the portions exposed to the outside. Two shielding walls 45
The shielding wall 45a on the entrance side of the key insertion holes 45a and 45b is formed on a ridge extending from the entrance side end of the key insertion hole 45 toward the back side in the longitudinal direction of the key insertion hole 45, specifically, a plate in an upright position. It is formed as a shape. The rear-side shielding wall 45b is formed as a substantially L-shaped plate-like body as shown in FIG. 10, and a portion formed on the side surface of the key insertion hole 45 as viewed in the longitudinal direction includes an entrance-side shielding wall. Like the key insertion hole 45a, the key insertion hole 45 has a protrusion extending in the longitudinal direction.

The shielding wall 45a on the entrance side and the shielding wall 45 on the back side
b, as shown in FIG. 12, virtually assuming the center of the key insertion hole 45 in the longitudinal direction as the center of the circle, the position of the key insertion hole 45 in the inner wall portion in the longitudinal direction is When represented by the phase of the virtual circle, the phases are formed 180 degrees different from each other. The rear shielding wall 45b is located between the pair of reset terminals 47a, 47b over the entire area where the pair of reset terminals 47a, 47b is exposed in the key insertion hole 45, and is shielded. The wall 45b is provided such that the height of the key insertion hole 45 from the wall surface is higher than the height of the pair of reset terminals 47a and 47b from the wall surface of the key insertion hole 45, and the metal plate is incorrectly inserted. As a result, a pair of reset terminals 47a,
47b constitutes a non-conductive partition for preventing conduction.

A pair of reset terminals 47a, 47
When b is short-circuited, the reset switch R is closed in the circuit shown in FIG. 2 and the supply of power from the battery V to each circuit is stopped. Therefore, the shielding wall 45b is formed as described above, and a pair of resets is performed. This prevents the terminals 47a and 47b from being short-circuited easily by the insertion of a conductive foreign matter.

A slider 5 provided with a rack portion 5a which meshes with the pinion gear 46 of the jack unit 4 in the state shown in FIG.
Is provided. The slider 5 is slidably engaged with a guide portion (not shown) provided on the inner wall of the housing 2, and the direction indicated by an arrow A in FIG. And is slidably movable, and is biased to return to the inside of the housing. As shown in FIGS. 3 to 7, the slider 5 has a first pressing portion 5 d that comes into contact with an end 41 b of the lock spring 41 as the slider 5 slides, and an end 42 of the lock spring 42.
b, a second pressing portion 5e is formed to be in contact with the end portion 42b of the lock spring 42 and the second pressing portion 5e is longer than the distance between the end portion 41b of the lock spring 41 and the first pressing portion 5d. It is made longer.

The disengagement key K has the outer shape shown in FIG. 13A, and as shown in FIG. 13B and FIG. The inner sleeve 60, which is relatively movable and is urged to return in the separation direction, is immersed in the outer sleeve 61, so that the rack portion 63 fixedly connected to the outer sleeve 61 appears. The tip of the rack 63 is
Slightly projecting from the tip of the inner sleeve 60,
The operation of inserting the rack portion 63 into the key insertion hole 45 is facilitated. The amount of the inner sleeve 60 that can be immersed in the outer sleeve 61 depends on whether the adjustment cap 62 is tightened on the outer sleeve 61 shown in FIG.
The setting can be changed in two stages with the outer sleeve 61 shown in FIG. 13C being loosened and the adjustment cap 62 being loosened, and the adjustment cap 62 shown in FIG. The possible amount is reduced.

Since the outer diameter of the tip of the inner sleeve 60 is larger than the diameter of the entrance of the key insertion hole 45, when the rack 63 is inserted into the key insertion hole 45, the tip of the inner sleeve 60 becomes the jack unit 4. And the inner sleeve 60 is immersed in the outer sleeve 61. When the immersion amount reaches the immersion amount set as described above, the rack 63 cannot be inserted any more, thereby restricting the insertion amount of the rack 63 into the key insertion hole 45. It is. Therefore, the rack 6
The insertion amount of the third key insertion hole 45 can be adjusted in two steps by operating the adjustment cap 62 described above. Rack section 63
As shown in FIG. 14 (a) when the rack portion 63 is viewed from the tip side and FIG. 14 (b) which is a partial side sectional view of the rack portion 63, the long groove 63a on the rack forming surface side and the opposite from the rack forming surface. It is configured in a specific shape having two concave grooves of the short groove 63b on the side.

The cross-sectional shape of the long groove 63a and the short groove 63b when viewed in the longitudinal direction is the cross-sectional shape of the entrance-side shielding wall 45a and the rear-side shielding wall 45b formed in the key insertion hole 45 shown in FIG. And the shielding wall 45a on the entrance side is in the long groove 63a, and the shielding wall 45b on the back side is
Are engaged with the short grooves 63b, respectively, so that the rack 63 of the disengaging key K is
And 45b can be inserted into the key insertion hole 45 without being blocked. Therefore, the two shielding walls 45a,
45b functions as insertion blocking means IS that allows the rack portion 63 formed in a specific shape to be inserted into the key insertion hole 45 and prevents the false operation tool having a shape other than the specific shape from being inserted into the key insertion hole 45. I do. In addition, the long groove 63a of the rack part 63
Corresponds to the shielding wall 45a on the entrance side of the key insertion hole 45, so that the length of the groove is longer than the short groove 63b corresponding to the shielding wall 45b on the back side.

Next, the engagement between the wire unit 3 and the housing 2 and the release of the engagement will be described. First, when the wire unit 3 and the housing 2 are engaged with each other, the lock pins 30 of the wire unit 3 shown in FIG. 3 are disengaged from the lock pins 30 as shown in FIG. Is inserted into the lock pin insertion hole 40b of the jack unit 4. When the lock pin 30 is inserted against the urging force of the coil spring 44b provided in the lock pin insertion hole 40b, the lock spring 4 is inserted into the engagement recess 30a of the lock pin 30.
The projection 42a protruding into the second lock pin insertion hole 40b engages, and reliably prevents the lock pin 30 from moving in the release direction by the urging force of the coil spring 44b, thereby maintaining the engagement state.

With one of the lock pins 30 inserted into the jack unit 4 and the other lock pin 30 entangled with a product or the like, as shown in FIG.
Into the lock pin insertion hole 40a. Lock pin 30
Is inserted against the urging force of the coil spring 44a provided in the lock pin insertion hole 40a.
The projection 41a protruding into the lock pin insertion hole 40a of the lock spring 41 is engaged with the engagement recess 30a, and the lock pin 30 is reliably prevented from moving in the release direction by the urging force of the coil spring 44a. Maintain a match state.
When both the lock pins 30 of the wire unit 3 are inserted into the lock pin insertion holes 40a and 40b as described above, power supply from the battery V to each circuit in the housing 2 shown in FIG. When the wire unit 3 is cut or the like, the sensor tag 1 outputs an alarm as described above.

Next, when the engagement between the wire unit 3 and the jack unit 4 is released from the state shown in FIG. 5, an engagement release key K shown in FIG. 13 is used. Normally, when removing the sensor tag 1 from the anti-theft object, the sensor pin 1 is used by detaching the lock pin 30 only from the lock pin insertion hole 40a near the key insertion hole 45 and removing the lock pin 30 from the anti-theft object. When the wire unit 3 needs to be replaced, the lock pin 30 inserted in the lock pin insertion hole 40b farther from the key insertion hole 45 is also detached.

In order to release the lock pin 30 only from the lock pin insertion hole 40a on the side close to the key insertion hole 45, the adjustment cap 62 is tightened so that the insertion amount of the rack portion 63 into the key insertion hole 45 is shortened. To release the lock pin 30 from the lock pin insertion hole 40b far from the key insertion hole 45 using the engagement release key K in the The disengagement key K is used in a state where the amount of insertion into the insertion hole 45 is increased.

When the rack portion 63 of the disengaging key K is inserted into the key insertion hole 45, as shown in FIG. 15, the tip of the rack portion 63 raises the pinion gear 46 and engages with the rack portion 5a of the slider 5, When further inserted, FIG.
As shown in FIG. 7, the rack 63 of the disengaging key K and the pinion gear 46 mesh with each other, and the pinion gear 46 rotates with the insertion of the rack 63. This pinion gear 46
The slider 5 provided with the rack portion 5a meshing with the pinion gear 46 moves in the direction of the arrow B in FIGS. At this time, the amount of movement of the slider 5 is determined by the first pressing portion 5 d of the slider 5 and the lock spring 41.
The adjustment cap 62 of the disengagement key K is tightened so that the second pressing portion 5e and the end 42b of the lock spring 42 are not yet in contact with each other. The insertion amount of the rack 63 at the time is set.

With the sliding movement of the slider 5, the first
When the pressing portion 5d presses the end 41b of the lock spring 41,
As shown in FIG. 6, the convex portion 41a of the lock spring 41 swings so as to retreat from the lock pin insertion hole 40a. Thus, the engagement between the engaging concave portion 30a of the lock pin 30 and the convex portion 41a of the lock spring 41 is released. As a result, the lock pin 30 into which the lock pin insertion hole 40a is inserted is pushed out by the urging force of the coil spring 44a, and the lock pin 30 is separated from the lock pin insertion hole 40a.

When the rack portion 63 of the disengagement key K is inserted into the key insertion hole 45, the rack portion 63 is connected to the pair of reset terminals 47a, 47 as shown in FIG.
b. Since the rack portion 63 is formed of a conductive material, when the rack portion 63 as the conductive portion contacts the pair of reset terminals 47a and 47b, the reset switch R in FIG. 2 is closed, and as a result, The operation of the power supply holding circuit VK stops the power supply from the battery V to each circuit in FIG. 2, and the operation of the alarm output means AO stops. Therefore, the reset switch R functions as alarm canceling means for stopping the operation of the alarm output means AO.

The lock pin 3 is inserted through the lock pin insertion hole 40a.
When the lock pin 30 inserted in the lock pin insertion hole 40b is further removed for replacement of the wire unit 3 from the state where the lock cap 30 has been removed, the adjustment cap 6 is used as described above.
The rack portion 63 of the disengagement key K with the 2 loosened is inserted into the key insertion hole 45.

Since the adjusting cap 62 is loosened, the insertion amount of the rack portion 63 into the key insertion hole 45 is long, and the sliding amount of the slider 5 in the direction of arrow B in FIG.
The second pressing portion 5e of the slider 5 and the end of the lock spring 42, which are larger than when the adjustment cap 62 is tightened and do not come into contact when the disengagement key K in which the adjustment cap 62 is tightened is inserted. The portion 42b contacts.

When the second pressing portion 5e presses the end portion 42b of the lock spring 42, as shown in FIG. 7, the convex portion 42a of the lock spring 42 swings so as to retract from the lock pin insertion hole 40b. Thus, the engagement recess 3 of the lock pin 30
That is, the engagement between the protruding portion 42a of the lock spring 42 and the protruding portion 42a of the lock spring 42 is released. As a result, the lock pin 30 into which the lock pin insertion hole 40b is inserted is pushed out by the urging force of the coil spring 44b, and the lock pin 30 is separated from the lock pin insertion hole 40b.

[Another Embodiment] Hereinafter, another embodiment will be described. In the above embodiment, the present invention is applied to the configuration in which the sensor tag 1 is attached to the anti-theft object by the wire unit 3, but FIGS. 18 (a) and 18 (b).
As shown in the figure, the pin 103 is inserted into the housing 2 with a cloth or the like to be stolen, and the detection switch SW is closed as the pin 103 is inserted into the housing 2, and the detection switch SW is closed. May be applied to a configuration in which the power supply from the battery V to each circuit is started by the closing operation of. Also, the wire unit 3 and the pin 10
A detection switch is provided in a state in which the detection tag protrudes outside from the sensor tag 1 without being provided, and when the sensor tag 1 is brought into contact with the anti-theft object, the detection piece of the detection switch is pushed in to detect the mounted state. Such a configuration may be adopted. In this case, the sensor tag 1 is wrapped and fixed with, for example, a film sheet in a state where the sensor tag 1 is attached to the anti-theft object.

In the above embodiment, the alarm output means AO
Outputs the alarm information by turning on the LED lamp 20 and emitting the alarm sound from the piezoelectric buzzer 21. The alarm signal is transmitted as an alarm signal, and the reception information is set at any place in the store. The radio wave may be received by a device to sound an alarm.

In the above embodiment, the alarm canceling means is configured to be in the alarm canceling operation state when the pair of reset terminals 47a and 47b are short-circuited.
The reset switch R may be turned on and off in mechanical linkage with the insertion of the engagement release key K into the key insertion hole 45.

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 an external view of a sensor tag according to an embodiment to which the present invention is applied.

FIG. 2 is a circuit diagram according to an embodiment of the present invention.

FIG. 3 is an enlarged view of a main part according to the embodiment of the present invention.

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

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

FIG. 6 is an enlarged view of a main part according to the embodiment of the present invention.

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

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

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

FIG. 10 is an enlarged view of a main part according to the embodiment of the present invention.

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

FIG. 12 is an enlarged view of a main part according to the embodiment of the present invention.

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

FIG. 14 is an enlarged view of a main part of the disengagement key according to the embodiment of the present invention.

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

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

FIG. 17 is a circuit configuration diagram according to an embodiment of the present invention.

FIG. 18 is an external view of a sensor tag according to an embodiment to which the present invention is applied.

[Explanation of symbols]

 2 Housing 3 Mounting tool 22 Antenna 41, 42 Locking means 45 Insertion hole 47a, 47b Electric contact part 63 Conductive part K Release operation tool O Transmitter SD Preliminary action detection means AO Alarm output means R Alarm release means VK holding means SW Removable Detection switch

Continuing from the front page (72) Inventor Masayuki Yao 2-47, Shizitsuhigashi, 1-chome, Namiwa-ku, Osaka-shi, Osaka (72) Inventor Mitsuhiko Nakajima Nakanohara 9608 (72) Inventor Shigeyoshi Takatori 4-22-9 Akatsutsumi, Setagaya-ku, Tokyo (72) Inventor Yasuhiro Noma 1-7-12 Tsukishima, Chuo-ku, Tokyo (56) References JP-A-5-274561 (JP, A) JP Hei 2-14398 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G08B 13/24 G08B 13/14

Claims (5)

(57) [Claims] 1. A housing (2) attached to an anti-theft object is provided with a preliminary action detecting means (SD) for detecting a preliminary action of theft, and the spare (2) is provided inside the housing (2). Action detection means (S
D) alarm output means (AO) for outputting alarm information based on the detected information, holding means (VK) for holding the alarm output means (AO) in an operating state, and the alarm output means (A
Alarm release means (R) for stopping the operation of O) is provided, and an insertion hole (45) for a release operation is formed from the outer peripheral portion of the housing (2) to the inside of the housing; The anti-theft device, wherein the means (R) is configured to be operated in an alarm release operation state by a rod-shaped release operation tool (K) inserted into the insertion hole (45), (VK) is constituted by an electric holding circuit that is set to a holding state based on a start command, and the alarm canceling means (R ) is provided with a conductive portion (63).
Wherein with the operated at releasing operating member (K) was made up by the holding release command switch for commanding holding release in an electric signal to the electric holding circuit (VK), the holding release command switches ( R) is the insertion hole (4
5) the conductive portion of the release operation tool (K) inserted in
By the contact of (63), a pair of power
An anti-theft device comprising air contact portions (47a) and (47b) . 2. The electric contact portions (47a) and (47).
b), the electrical contacts (47a) and (47b)
In a state of protruding from the contact surface, the non-conductive partition (45)
b) is provided, and the release operation tool (K ) is provided with the conductive portion (63).
Allow contact with each electrical contact (47a), (47b)
A concave portion which engages with the partition portion (45b) in a state in which
The anti-theft device according to claim 1, wherein (63b) is formed . 3. The preparatory action detecting means (SD) includes:
In order to attach the housing (2) to the anti-theft object, the housing
Attachment (3) connected to body (2) and its attachment
(3) a contact for electrically detecting attachment / detachment to / from the housing (2);
A detachment detection switch (SW), and the holding means (VK) is provided with the detachment detection switch (S
Is set to the holding state based on the mounting detection signal of W).
And the alarm output means (AO) is provided with the detachment detection switch.
Outputs alarm information based on the (SW) separation detection signal
The anti-theft device according to claim 1, wherein the anti-theft device is configured to be configured as follows . 4. The preparatory action detecting means (SD) includes:
Transmitter installed in the housing (2) and installed at a specific location
Equipped with an antenna (22) for receiving radio waves from the vessel (O)
And the alarm output means (AO) is provided with the antenna (22).
It is configured to output alarm information based on the received signal.
4. The anti-theft device according to claim 1, 2 or 3 . 5. The mounting device (3) is attached to the housing (2).
Locking means (41), (42) for locking in the mounted state
The locking means (41) and (42) are provided with the insertion holes (4).
5) Release the lock with the release operation tool (K) inserted in
5. The apparatus according to claim 3, wherein the apparatus is configured to be operated in a state.
Anti-theft device as described .