JP2000251160A - Alarm unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently take out alarm tone generated from a buzzer in an alarm unit of a type that is attached closely to merchandise. SOLUTION: In an alarm unit 1 which is connected to at least one surface of an object of theft prevention, detects that the connection to the object of theft prevention is cut off or that an operation signal transmitted to a prescribed area is received and generate alarm tone, recessed grooves 6 extending up to the peripheral part of the alarm unit are formed on the surface of the alarm unit which is brought into contact with the object of the alarm unit, and sound emitting holes 7 for emitting the alarm tone are provided in the grooves 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm unit which is coupled to a product displayed in a store and protects the product from fraudulent acts such as shoplifting.

[0002]

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

Such an anti-theft system comprises an anti-theft gate (30) installed near an outlet (40) of a store,
And an alarm unit (20) attached to the product (50). A circuit board (31) and a transmitting antenna (not shown) are built in the anti-theft gate (30), and the circuit board (31) is a transmitting circuit for generating an alarm operation signal (notification signal) for the alarm unit (20). (Not shown).

As shown in FIG. 3, the alarm unit (20) includes a buzzer (22), a circuit board (23), a battery (not shown) and the like inside a casing (21). A plurality of sound emission holes (24) are opened, and an alarm actuating switch piece (25) interlocking with the state of attachment to the product (50) is provided in a protruding manner. Buzzer (2
2) The operation is controlled by the circuit board (23), and when the alarm unit (20) is removed from the product (50), or the alarm unit (20) passes through the anti-theft gate (30). It sometimes sounds.

[0005] In a store, the product (50) is displayed on a display stand with the alarm unit (20) attached. When a sales clerk sells a product (50) to a customer, a specific reset signal is sent from the alarm nullification device (not shown) to the circuit board (23) of the alarm unit (20) to output the buzzer (2).
After setting 2) not to sound, the alarm unit (20) is removed from the product (50), and the customer is handed the product (50) in exchange for the price.

[0006] On the other hand, if the customer illegally removes the alarm unit (20) from the product (50), the alarm operation switch piece (2).
5) is turned off, and the buzzer (22) sounds. Also, the customer illegally sends the product (50) to the alarm unit (2).
0), the circuit board (23) of the alarm unit (20) is attached to the anti-theft gate (3).
In response to the alarm activation signal from the transmitting antenna of 0), the buzzer (22) sounds.

[0007]

However, in the alarm unit as shown in FIG. 3, since the alarm operation switch piece is provided in close contact with the product on the side where the alarm switch piece is provided,
Even if a sound emission hole is provided on such a surface, the hole is blocked by the product, and the alarm sound is reduced. Therefore, the sound emission hole was only formed on the surface and the side opposite to such a surface.
That is, in the conventional alarm unit, since the place and the number of the sound emitting holes are limited, the alarm sound emitted from the buzzer in the alarm unit cannot be efficiently taken out of the unit.

[0008]

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 emits an alarm sound upon detecting that the alarm signal has been received or that an operation signal transmitted to a predetermined area has been received, a concave portion extending to an outer peripheral portion of the alarm unit is provided on a surface of the alarm unit in contact with the object. A groove is formed, and the groove is provided with a sound emission hole for emitting the alarm sound.

[0009]

1 (a) and 1 (b) show an embodiment of an alarm unit according to the present invention. FIG. 1 (a) is a plan view of a surface attached to a product, and FIG. 1 (b). Figure 1 (a)
It is AA sectional drawing of.

In FIG. 1, (1) is an alarm unit,
(2) is a casing of the alarm unit (1), (3) is an alarm buzzer, (4) is a circuit board, (5) is an alarm operation switch piece, which is the same as the conventional alarm unit shown in the figure. is there. (8) is a product to which the alarm unit (1) is attached.

(6) The alarm unit (1) is a product (8)
The groove is formed in the casing (2) on the surface attached to the casing and extends to the outer peripheral portion of the casing (2).
(7) is a sound emission hole provided in the concave groove (6). still,
The sound emission hole (7) is also provided on the surface and the side opposite to the surface on which the alarm unit (1) of the casing (2) is attached to the product (8), as in the conventional example, but is not shown in FIG. are doing.

In this embodiment, the alarm sound emitted from the alarm buzzer (3) is generated not only on the surface and the side opposite to the mounting surface of the conventional device but also on the mounting surface of the product. It is also taken out of the alarm unit (1) through the groove (6) from the sound emitting hole (7) provided.

Incidentally, these concave grooves (6) and sound emitting holes (7)
The number and shape of can be set arbitrarily without being limited to the present embodiment.

[0014]

According to the alarm unit of the present invention, the alarm sound can be effectively taken out from the sound emission hole provided on the mounting surface side of the product, so that the sound emission hole provided in the alarm unit can be effectively removed. The degree of freedom in designing the location, number, and shape is widened, and the total opening area of the sound emission holes can be sufficiently taken, so that a sufficiently large alarm sound can be obtained.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of an alarm unit according to the present invention, wherein (a) is a plan view and (b) is a cross-sectional view taken along line AA of (a).

FIG. 2 is a perspective view showing an anti-theft gate installed near an outlet of a store.

FIG. 3 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 Alarm buzzer 4 Circuit board 5 Alarm operation switch piece 6 Concave groove 7 Sound emission hole

Claims (1)

[Claims] At least one surface is coupled to the anti-theft object to detect that the coupling state with the anti-theft object is released or that an operation signal transmitted to a predetermined area is received. In the alarm unit that emits an alarm sound, a concave groove extending to the outer peripheral portion of the alarm unit is formed on a surface of the alarm unit that contacts the object, and a sound emission for generating the alarm sound is formed in the concave groove. An alarm unit comprising a hole.