JP2000251162A - Alarm unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an alarm unit capable of preventing the alarm unit stuck to merchandise from being illicitly detached from the merchandise by using a thin plate or the like. SOLUTION: In this alarm unit 1 connected to an object of burglar prevention on at least one surface for detecting that a connection state with the object of the burglar prevention is canceled and originating alarm sound, an operation switch 4 for detecting the connection state is provided on the surface in contact with the object of the alarm unit and a recessed groove 6 is formed in at least one direction around the operation switch.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-theft device coupled to a product displayed in a store and protecting the product from fraudulent acts such as shoplifting.

[0002]

2. Description of the Related Art Conventionally, in stores which sell and display products such as compact disk cassettes and magnetic tape cassettes, in order to protect these products from fraudulent acts such as shoplifting, a theft prevention system as shown in FIG. Has adopted.

[0003] Such an anti-theft system comprises an anti-theft gate 30 installed near the exit 40 of a store, and a product 50.
And an alarm unit 20 attached to the control unit. The anti-theft gate 30 has a built-in circuit board 31 and a transmitting antenna (not shown). The circuit board 31 has a transmitting circuit (not shown) for generating an alarm activation signal (notification signal) for the alarm unit 20. .

As shown in FIG. 8, the alarm unit 20 includes a buzzer 22, a circuit board 23, a battery (not shown) and the like inside a casing 21, and a plurality of sound emitting holes 24 are formed on the surface of the casing 21. On the surface to be attached to the product 50, the alarm operation switch piece 2 linked to the attachment state is provided.
5 is protruded. The operation of the buzzer 22 is controlled by the circuit board 23 and sounds when the alarm unit 20 is removed from the product 50 or when the alarm unit 20 passes through the anti-theft gate 30.

[0005] At a store, the product 50 is displayed on a display stand with the alarm unit 20 attached. When the store clerk sells the product 50 to the customer, the alarm disabling device (not shown) sends a specific reset signal to the circuit board 23 of the alarm unit 20 so that the buzzer 22 is not sounded, and the alarm is turned off. Remove the unit 20 from the product 50,
In exchange for the price, the merchandise 50 is handed to the customer.

On the other hand, if the customer illegally removes the alarm unit 20 from the product 50, the alarm operation switch piece 25 is turned off, and the buzzer 22 sounds. If the customer illegally takes the product 50 out of the store together with the alarm unit 20, the circuit board 23 of the alarm unit 20
However, the buzzer 22 will sound in response to the alarm activation signal from the transmission antenna of the anti-theft gate 30.

[0007]

However, in an alarm unit of the type which is attached to a product as shown in FIG. 8 and which turns on the alarm operation switch piece, as shown in FIG. There is a concern that the alarm unit 1 may be illegally removed from the product 8 by inserting the thin plate 9 between them and preventing the alarm operation switch piece 5 from being turned off.

Accordingly, the present invention provides an alarm unit which can prevent the alarm unit from being illegally removed from the product by using the thin plate.

[0009]

In order to solve the above-mentioned problems, an alarm unit according to the present invention is connected to an object to be stolen in at least one plane, and the state of connection with the object to be stolen is solved. In an alarm unit that detects that it has been turned on and emits an alarm sound, an operation switch that detects the coupling state is provided on a surface of the alarm unit that is in contact with the object, and is provided in at least one direction around the operation switch. A concave groove is formed.

Further, another alarm unit according to the present invention comprises:
An alarm unit that is coupled to the anti-theft object on at least one surface and that detects that the coupling state with the anti-theft object has been released and emits an alarm sound, wherein the alarm unit contacts the object of the alarm unit; An operation switch for detecting the coupling state is provided on the surface, and a step higher than the coupling surface with the object is provided around the operation switch.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an alarm unit according to the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view of an alarm unit 1 according to a first embodiment of the present invention. A circuit board 3 and an alarm operation switch 4 are disposed in a casing 2. Is protruded to the outside of the casing 2. On the surface of the casing 2 on the side where the operation switch piece 5 protrudes to the outside of the casing 2, a concave groove 6 is formed around the operation switch piece 5.

In this embodiment, as shown in FIG. 2, the operation switch piece 5 is attached to the product 8 on the protruding side, and the thin plate 9 is inserted between the alarm unit 1 and the product 8. Even if it is attempted, the thin plate 9 is locked by the wall surface of the concave groove 6, and it is possible to prevent the alarm unit 1 from being illegally removed from the product 8. In this embodiment, the larger the width of the concave groove 6, the more effective it is to lock the thin plate 9, and it is preferable that the width is about 2 mm or more.

The concave groove 6 may be formed in a direction in which the thin plate 9 can be inserted in consideration of a state in which the alarm unit 1 is attached to the product 8. For example, if the thin plate 8 is formed in a lattice shape, it can be locked regardless of the direction in which the thin plate 8 is inserted.

FIG. 3 shows a second embodiment of the present invention.
The same or corresponding elements as those of the first embodiment are denoted by the same reference numerals (the same applies hereinafter). In such a second embodiment,
A thin plate (not shown) in which a plurality of concave grooves 6 are formed and inserted by the wall surfaces of the concave grooves 6 as in the first embodiment.
Can be locked.

FIG. 4 shows a third embodiment of the present invention. In the third embodiment, a step h is formed around the operation switch piece 5.
Is provided with a step 7 of about 0.2 to 0.5 mm. In the third embodiment, a thin plate (not shown) inserted by the wall of the step 7 can be locked.

FIG. 5 shows a fourth embodiment of the present invention. In the fourth embodiment, the concave groove 6 is formed around the step 7 in the third embodiment. That is, the alarm unit 1
Is usually formed by plastic molding. In the third embodiment, the step h of the step 5 is 0.2 to 0.5.
Since it is extremely small, such as about mm, the wall surface of the step 7 is easily inclined and formed at the time of molding, and in this case, it becomes difficult to lock the inserted thin plate. On the other hand, in the fourth embodiment, the height of the step 7 can be substantially increased by forming the concave groove 6 around the step 7, and the wall surface of the step 7 is vertical at the step. Can be formed. In the case of this embodiment, the width of the concave groove 6 may be arbitrary.

[0018]

As described above, according to the alarm unit of the present invention, by providing a groove or a step around the operation switch piece on the surface to be attached to the product, the alarm unit is provided between the product and the alarm unit. The inserted thin plate can be locked on these wall surfaces, and unauthorized removal of the alarm unit can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of an alarm unit according to the present invention.

FIG. 2 is a sectional view for explaining the operation of the alarm unit according to the present invention.

FIG. 3 is a sectional view showing a second embodiment of the alarm unit according to the present invention.

FIG. 4 is a sectional view showing a third embodiment of the alarm unit according to the present invention.

FIG. 5 is a sectional view showing a fourth embodiment of the alarm unit according to the present invention.

FIG. 6 is a sectional view for explaining a problem of a conventional alarm unit.

FIG. 7 is a perspective view showing an anti-theft gate installed near an outlet of a store.

FIG. 8 is a perspective view showing a conventional alarm unit attached to a product.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Alarm unit 2 Casing 3 Circuit board 4 Alarm operation switch 5 Operation switch piece 6 Concave groove 7 Step part

Claims (4)

[Claims] 1. An alarm unit which is coupled to an anti-theft object on at least one side and detects that the coupling state with the anti-theft object is released, and emits an alarm sound. An alarm unit, wherein an operation switch for detecting the connection state is provided on a surface in contact with the object, and a groove is formed in at least one direction around the operation switch. 2. The alarm unit according to claim 1, wherein a plurality of rows of concave grooves are formed in the one direction. 3. An alarm unit coupled to at least one surface of an object to be stolen and detecting an uncoupled state with the object to be stolen and emitting an alarm sound, wherein An alarm unit, wherein an operation switch for detecting the coupling state is provided on a surface in contact with the object, and a step higher than the coupling surface with the object is provided around the operation switch. . 4. The alarm unit according to claim 3, wherein a concave groove is provided around the step.