JP3081455B2 - 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, and alarm release means for stopping the operation of the alarm output means are provided, and for the release operation from the outer surface of the housing toward the inside of the housing. The present invention relates to an anti-theft device in which an insertion hole 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.

[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. Conventionally, this rod-shaped release operation tool has a simple shape such as a prism or a cylinder, and the shape of the insertion hole of the housing of the anti-theft device into which the release operation tool is inserted is also adapted to the shape of the release operation tool. Was there.

[0004]

Therefore, there is a possibility that a device having a shape similar to the release operation tool may exist. It is also conceivable that the alarm canceling means may be operated in the alarm canceling operation state by being inserted into the insertion hole of the housing, and the operation of the alarm output means may be stopped. 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 prevent as much as possible the fraudulent operation of the anti-theft device by a fake operation tool other than the authorized release operation tool. A second object is to achieve the first object with a simple configuration.

[0005]

According to the present invention, there is provided an anti-theft device provided with a preparatory act detecting means for detecting a preliminary act of theft in a housing attached to an anti-theft object. Alarm output means for outputting alarm information based on the detection information of the preliminary action detection means, and alarm release means for stopping the operation of the alarm output means, provided from the outer surface of the housing to the inside of the housing. An insertion hole for a release operation is formed facing the alarm release device, and the alarm release means is configured to be operated to an alarm release operation state by a rod-shaped release operation tool inserted into the insertion hole. The first characteristic configuration is that the release operating tool is configured in a specific shape, the release operating tool configured in the specific shape is allowed to be inserted into the insertion hole, and a false operation of a shape other than the specific shape is performed. Of the tool into the insertion hole Insertion blocking means for the provided inside of the insertion hole, the insertion preventing means, of the insertion hole
As viewed in the longitudinal direction, from the inner wall of the insertion hole to the inside of the insertion hole.
Consists of a projection on the entrance side and a projection on the back side
The protrusion on the inlet side may be an end on the inlet side of the insertion hole.
Into a ridge that extends toward the back in the longitudinal direction of the insertion hole.
And the projection on the inlet side and the projection on the back side are
The insertion holes are formed in different phases when viewed in the longitudinal direction of the insertion holes.
As the specific shape, the insertion operation is performed on the outer surface of the release operation tool.
A recess into which the protrusion engages when inserted into the inlet
The point is that a groove is formed.

A second characteristic configuration is the same as the first characteristic configuration.
The projection on the back side is formed as a ridge extending in the longitudinal direction of the insertion hole.

[0007]

According to the first characteristic configuration of the present invention, even if a fake operation tool having a shape other than the specific shape which is the shape of the release operation tool is to be inserted into the insertion hole formed in the housing of the anti-theft device,
The insertion prevention means provided inside the insertion hole prevents the insertion of the false operation tool, and does not affect the operation of the alarm release means at all. On the other hand, when the release operation tool is inserted into the insertion hole,
The insertion prevention means allows the release operation tool to be inserted, and the alarm release means is operated in the alarm release operation state to stop the operation of the alarm output means.

Further, since there is a projection projecting from the inner wall portion of the insertion hole toward the inside of the insertion hole, a fake operation tool having a shape other than the specific shape which is the release operation tool is inserted into the insertion hole. The projection prevents the insertion and does not affect the operation of the alarm release means. On the other hand, when the release operation tool is inserted into the insertion hole, a concave groove is formed on the outer surface of the release operation tool so that the protrusion can be engaged with the release operation tool. The operation tool is inserted into the insertion hole. Then, the alarm canceling means is operated in the alarm canceling operation state to stop the operation of the alarm output means.
That is, it is possible to prevent the false operation tool from being inserted into the insertion hole only by providing the protrusion on the inner wall portion of the insertion hole and forming a concave groove on the outer surface of the release operation tool in which the protrusion can be engaged.

Further, since the above-mentioned projection is formed on the deeper side than the entrance of the insertion hole, it is not easy to observe the shape of the projection from the entrance of the insertion hole. Can be made difficult to produce fraudulently. Also, a plurality of projections of the insertion hole are provided, and the projections have different phases in the longitudinal direction of the insertion hole, that is, virtually, the center of the insertion hole in the longitudinal direction is regarded as the center of the circle. The position of the insertion hole in the inner wall portion when viewed in the longitudinal direction is formed in a different phase when represented by the phase of the virtual circle, and one projection is different from the other projection in the longitudinal direction of the insertion hole. Each of the plurality of projections contributes to effectively preventing insertion of the false operation tool, since it is not completely hidden by the object.

[0010] Further, the insertion hole, since the plurality of protrusions are formed longitudinally different positions, the length a plurality of projections is the length of the groove of the outer surface of the release operation member for engaging enter As a result, a thick portion or a thin portion also exists in the thickness of the release operation tool. According to the second aspect of the present invention,
For example, the projection on the back side of the insertion hole is also formed as a ridge extending in the longitudinal direction of the insertion hole, so that when the release operation tool is inserted into the insertion hole, the projection of the insertion hole becomes the release operation tool. The length of engagement with the concave groove is increased, and the posture of the release operation tool can be stably supported by the projection.

[0011]

According to the first characteristic configuration, even if a false operation tool having a shape other than the specific shape, which is the shape of the release operation tool, is to be inserted into the insertion hole formed in the housing of the anti-theft device, Since the insertion preventing means provided inside the insertion hole prevents the insertion of the fake operating tool, it is possible to prevent the operation of the anti-theft device from being illegally stopped as much as possible. Further, a simple structure is provided in which a projection is provided on the inner wall portion of the insertion hole and a concave groove in which the projection can be engaged is formed on the outer surface of the release operation tool.
You can do it .

[0012] Also, it is possible that unauthorized making a copy of the release operation member shall difficult, the more effectively unauthorized theft prevention device to prevent as much as possible from being deactivated Can be. Further, since each of the plurality of projections formed in the insertion hole of the housing of the anti-theft device contributes to effectively prevent insertion of the false operation tool, the operation of the anti-theft device is more effectively and illegally stopped. Can be prevented as much as possible.

Further, since the release operation tool has a thick portion or a thin portion, the plurality of protrusions are located at the same position in the longitudinal direction of the insertion hole, and the protrusions are engaged. The strength of the release operating tool can be increased as compared to the case where the concave groove is formed in the release operating tool and the thickness of the release operating tool is uniformly reduced. According to the second characteristic configuration, the posture of the release operation tool can be stably supported by the protrusion formed in the insertion hole of the housing of the anti-theft device, so that the release operation tool is inserted into the insertion hole. It becomes easy to do,
The anti-theft device can be made easy to handle.

[0014]

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 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. Further, a slight step is formed at the end of the jacket 32 that covers the lock pin 30, and when the lock pin 30 is inserted into the housing 2, as shown in FIG. Is not immersed in the housing 2 so that the lock pin 30 is not exposed to the outside. 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 is connected to the negative electrode of the battery and the ground of each circuit as the wire unit 3 is inserted into the housing 1 to connect the battery V to each circuit. A power supply holding circuit VK is provided for starting the power supply and, once the power supply is started, maintaining the power supply unless the reset switch R is closed.

The circuit having the above-described 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, when the wire unit 3 and the housing 2 are not connected in series because the wire unit 3 is cut or the like, the input side terminal of the wire input circuit 24 rises from the ground potential. When a terminal on the input side of the wire input circuit 24 reaches a set potential or higher, the wire input circuit 24
Is detected as being disconnected. Wire input circuit 2
4 detects a disconnection of the wire unit 3 and 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 receives the count completion signal of the counter 27 and keeps 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. As a result, if the disconnection signal is not received continuously for a certain period of time, the piezoelectric buzzer 2
1 and the LED lamp 20 do not operate, thereby preventing a 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 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.

Therefore, the resonance antenna 22, the antenna input circuit 23 and the wire input circuit 24
Functioning as preliminary action detection means SD for detecting a preliminary action of theft to cut the sensor tag 1 from the anti-theft object illegally or to take the anti-theft object attached with the sensor tag 1 out of the store. Switching circuit 25, oscillation circuit 26, counter 27, latch circuit 28, buzzer / LED driver 29, LED lamp 2
0 and the piezoelectric buzzer 21 function as alarm output means AO for outputting 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.

The lock springs 41 and 42 have their bent portions 4
At 1c and 42c, they are locked by spring locking projections 49 protruding from the main body of the jack unit 4. End portions 41b, 42b of lock springs 41, 42 on the side farther from bent portions 41c, 42c and bent portions 41c, 42c.
At the intermediate portion between the two, convex portions 41a and 42a which engage with the engaging concave portions 30a of the lock pin 30 are provided in such a manner as to be able to move into and out of the lock pin insertion holes 40a and 40b as described later.

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, so that no force is applied to the lock springs 41 and 42. 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 to come 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.

A key insertion hole 45, which is an insertion hole for release operation, is formed at a position 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 rack portion 63 of the disengagement key K described later is inserted into the key insertion hole 45. FIG.
FIG. 11 is a partial cross-sectional view taken along the line PP ′ in FIG.
In addition, as shown in FIG. 12 when the key insertion hole 45 is viewed from the outside, the key insertion hole 45 is rotated by the insertion of the disengaging key K into the key insertion hole 45 of the rack portion 63. 2 and a reset switch R shown in FIG.
A pair of reset terminals 47a, 47 which are part of
b from the side wall of the key insertion hole 45 to the key insertion hole 4
5. Two shielding walls 45a, 4 which are protrusions protruding inward
5b are formed at different positions in the longitudinal direction of the key insertion holes 45 on the entrance side and the back side.

The pinion gear 46 is rotatably supported by the jack unit 4 body such 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 height of the wall 45b from the wall surface of the key insertion hole 45 is higher than the height of the pair of reset terminals 47a, 47b from the wall surface of the key insertion hole 45.

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 that 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 in the longitudinal direction is the cross-sectional shape of the entrance-side shield wall 45a and the rear-side shield 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 and release of the engagement between the wire unit 3 and the housing 2 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 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, the tip of the rack portion 63 lifts the pinion gear 46 and engages with the rack portion 5a of the slider 5, as shown in FIG. 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 63 of the disengagement key K is inserted into the key insertion hole 45, as shown in FIG. 16, the rack 63 is connected to the pair of reset terminals 47a and 47.
b. Since the rack 63 is made of a conductive material, when the rack 63 contacts the pair of reset terminals 47a and 47b, the reset switch R in FIG. 2 is closed, and as a result, the power holding circuit V
By the operation of K, the power supply from the battery V to each circuit in FIG. 2 is stopped, and the operation of the alarm output means AO is stopped.

Therefore, a pair of reset terminals 47
The power holding circuit VK shown in FIGS. 2A and 2B and the power holding circuit VK shown in FIG. It functions as release means AR. 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 pin 30 is removed from the lock pin insertion hole 40a,
The disengagement key K with the adjustment cap 62 loosened as described above
Is inserted into the key insertion hole 45.

Since the adjustment cap 62 is loosened, the insertion amount of the rack portion 63 into the key insertion hole 45 is long, and the sliding movement 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 to retreat 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.

[Other Embodiments] Other embodiments will be listed below. In the above-described 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. 17 (a) and 17 (b)
As shown in (1), the present invention may be applied to a configuration in which the pin 103 is attached by inserting the pin 103 into the housing 2 with a cloth or the like to be stolen. Even in such a configuration, FIG.
8, the detection switch SW is closed as the pin 103 is inserted into the housing 2, and the power supply from the battery V to each circuit is started by the closing operation of the detection switch SW. I can do it.

In the above embodiment, the insertion blocking means IS is constituted by the two shielding walls 45a and 45b.
The key insertion hole 45 shown in FIG. 9 (a) may be constituted by an insertion prevention wall 200 having a cross-sectional shape as viewed in the longitudinal direction.
Although not shown in FIG. 19, the insertion preventing wall 200 is installed at an intermediate position between the entrance of the key insertion hole 45 and the pinion gear 46, and as shown in FIG. At the entrance, a door 210 that is swingably openable and closable in a double-open state and is urged to return to the closed side is installed.
It is difficult to observe the shape of the insertion prevention wall 200 from the outside. As the engagement release key K, as shown in FIG. 19C, a key provided with a bar-shaped release operation tool having a cross-shaped rack 220 in conformity with the shape of the insertion prevention wall 200 is prepared. When the rack part 220 is inserted into the key insertion hole 45, as shown in FIG. 19D, the door body 210 is pushed open, passes through the installation location of the insertion prevention wall 200, and rotates the pinion gear 46 (not shown). Drive.

In the above embodiment, the insertion preventing means IS
Is constituted by two shielding walls 45a and 45b fixedly installed on the inner wall portion of the key insertion hole 45, but the shielding wall is configured to be able to retreat into the inner wall of the key insertion hole 45, Abuts against the shielding wall, and when the shielding wall is retired, the retirement is detected, and the holding piece for holding the fake operating tool is inserted into the key insertion hole 4.
5 to prevent the false operation tool from being inserted into the key insertion hole 45.

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 release means AR
Is configured such that when the pair of reset terminals 47a and 47b are short-circuited, the alarm release operation state is established, but mechanically interlocks with the insertion of the engagement release key K into the key insertion hole 45. Alternatively, the configuration may be such that the reset switch R is turned on and off.

In the above embodiment, two shielding walls 45a and 45b as the insertion preventing means IS are provided, but one or three or more shielding walls 45a and 45b may be provided.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying 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 an external view of a sensor tag according to another embodiment of the present invention.

FIG. 18 is a circuit configuration diagram according to another embodiment of the present invention.

FIG. 19 is an enlarged view of a main part according to another embodiment of the present invention.

[Explanation of symbols]

 2 Housing 45 Insertion hole 45a, 45b Projection 63 Release operation tool 63a, 63b Groove SD Preliminary action detection means AO Alarm output means AR Alarm release means IS Insertion prevention means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G08B 13/24 G08B 13/14

Claims (2)

(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 detection information, and alarm release means (AR) for stopping the operation of the alarm output means (AO). An insertion hole (45) for a release operation is formed from the outer surface portion toward the inside of the housing, and the alarm release means (AR) is a rod-shaped release operation tool (63) inserted into the insertion hole (45). Wherein the release operation tool (63) is configured to have a specific shape, and the release operation tool (63) is configured to have the specific shape. ) Is inserted into the insertion hole (45), and insertion preventing means (IS) for preventing insertion of a fake operation tool having a shape other than the specific shape into the insertion hole (45) is provided. 45) , wherein the insertion preventing means (IS) is Length of the insertion hole (45)
As viewed in the hand direction, the insertion hole extends from the inner wall of the insertion hole (45).
An inwardly protruding projection (45a) and an inwardly protruding projection
The protruding object (45a) on the entrance side is formed by the insertion hole (45).
From the inlet side end of the insertion hole (45) to the back side in the longitudinal direction.
Is formed on the ridge extending toward the inlet side of the projections (45a) and the rear side of the protrusion (4
5b) has a different shape when viewed in the longitudinal direction of the insertion hole (45).
Is formed on that phase, as the specific shape, the outer surface of the releasing operating member (63)
In the state inserted in the insertion hole (45),
The groove (63) into which the projections (45a) and (45b) are engaged.
a) An anti-theft device in which (63b) is formed . 2. The rear projection (45b) is formed as a ridge extending in the longitudinal direction of the insertion hole (45).
The anti-theft device according to claim 1 .