JPH082794Y2 - Resonant tag - Google Patents

Description

[Detailed Description of the Invention] [Industrial technical field] The present invention relates to a resonance tag, and in particular, it has a resonance circuit as a sensor composed of a coil and a capacitor planarly formed in a loop shape for a plurality of turns to prevent theft of goods. The present invention relates to improvement of a resonance tag attached to a product in a system.

[Prior Art] In recent years, for example, in general retail stores and supermarkets, an example of installing a product theft prevention system in order to prevent products from being illegally taken out from a sales floor is increasing.

This product theft prevention system has transmitting / receiving antennas installed at the entrance / exit of a store, and a transceiver is connected to each of these transmitting / receiving antennas. When the product passes between the transmitting and receiving antennas, the received signal at the receiving antenna changes, and this change is detected by the receiver to detect the passage of the product with the resonance tag.

In such a product theft prevention system, the resonance tag 1 used for a product has a plurality of conductive material formed in a loop shape on one surface of an insulating plastic substrate 3 as shown in FIG. 9, for example. To form a coil 5, an independent connection electrode 7 is formed in the vicinity of the inner end of the coil 5 with a space therebetween, and a chip-shaped capacitor 9 is soldered between the inner end and the connection electrode 7. The resonance circuit 13 is formed by connecting the connection electrode 7 and the jumper wire 11 which is insulated and covered between the connection electrode 7 and the outer end portion of the coil 5 so as to cross the coil 5.

Such a resonance tag 1 is used by attaching it to an operation surface of a product such as a video cassette tape 15 with an adhesive (not shown) as shown in FIG.

[Problems to be Solved by the Invention] However, the resonance tag 1 configured as described above is
Since the coil 5 is formed of a conductive material in a planar shape in a plurality of turns in a loop shape, it is necessary to short-circuit the connection electrode 7 so as to cross over the coil 5, and the coil 5 is insulated so as not to come into contact with the coil 5. It is necessary to use jumper wires.

Therefore, an extra step such as peeling off the insulation at both ends of the insulating coated conductor to create a jumper wire is required, which is troublesome to manufacture and has been an obstacle to cost reduction.

As a result of diligent observation and examination of the resonance tag 1, the present inventor completed the present invention by focusing on the fact that an adhesive is applied to one side of the resonance tag 1 for products such as the video cassette tape 15 and the like. Let

The present invention has been made to solve the above-described problems, and an object thereof is to provide a resonance tag that is easy to manufacture and easy to reduce the cost.

[Means for Solving the Problem] In order to solve this problem, the present invention is to form a coil on a single surface of an insulating substrate in a loop shape and form a coil in a planar manner, and connect a capacitor to the coil. Attach an insulating sheet via an adhesive layer on the coil between at least both ends of the coil except near the ends of both ends of the coil,
Short-circuiting the ends of the coil from above the insulating sheet with jumper wires, connecting the ends of the coil facing the ends, and placing the jumper wires between them to insulate the two separating means. It is formed into a sheet.

[Operation] In the present invention having such means, when the insulating sheet is peeled off, the region sandwiched by these separating means can be separated from the insulating sheet by the two separating means, and the adhesive sheet is adhered after peeling off the insulating sheet. The layer is exposed, and a region sandwiched between the two separating means remains between the coil and the jumper wire, and the remaining region functions as an insulating layer of the jumper wire with respect to the coil.

[Examples] Details of the present invention will be described below with reference to the drawings.

1 and 2 are a plan view and a sectional view showing an embodiment of a resonance tag according to the present invention.

In both figures, a coil 19 formed by winding a conductive material in a plurality of turns in a rectangular loop shape is formed on one surface of a substrate 17 made of a non-magnetic material and made of insulating plastic.

The inner and outer ends of this coil 19 are connected to each other.
19a and 19b, which are elongated independent connection electrodes 21 with a little space on the tip extension line of the inner connection portion 19a.
Is formed, and the connection electrode 21 serves as a substantially inner end portion of the coil 19.

The coil 19 and the connecting electrode 1 can be easily manufactured, for example, by forming a copper wiring board having a copper layer formed on one surface thereof by a printed wiring board having unnecessary portions removed by a known method such as etching.

A chip-shaped capacitor 23 is soldered between the connection electrode 21 and the inner connection portion 19a.

On one surface of the substrate 17, the adhesive layer 25 (first
An insulating sheet 27 made of tack paper or the like, which is easily peeled off, is attached via (not shown in the figure).

First to third windows 27a to 27c are formed in the insulating sheet 27, for example, by punching. As shown in FIG. 3, the first window 27a opposes the inner connecting portion 19a of the coil 19 to the inner connecting portion 19a. The end of the connection electrode 21 and the vicinity of the capacitor 23 are exposed, the second window 27b exposes the vicinity of the opposite end of the connection electrode 21, and the third window 27c exposes the vicinity of the outer connection portion 19b. are doing.

That is, the first window 27a has an inner size that allows the capacitor 23 to be connected to the inner connection portion 19a and the connection electrode 21 after the insulating sheet 27 is attached.

The connection electrode 21 of the second window 27b and the outer connection portion of the third window 27c
A jumper wire 29 which is not covered with insulation is soldered and connected between 19b so as to pass over the insulating sheet 27, and a resonance circuit 31 such as an equivalent circuit shown in FIG. 4 is formed.

The insulating sheet 27 has a pair of separation grooves 33a, 3a formed on both sides of the jumper wire 29 with a slight gap therebetween.
3b is formed so as to connect the second and third windows 27b, 27c, and the resonance tag 35 is configured.

As shown in FIG. 2, the pair of separation grooves 33a and 33b are formed to a depth that does not cut the coil 19 and are surrounded by the separation grooves 33a and 33b when the insulating sheet 27 is peeled off. The elongated separation region 37 becomes separable from the insulating sheet 27 and functions to remain on the substrate 17.

In the resonance tag 35 configured as described above, the adhesive layer 25 appears when the insulating sheet 27 is peeled off, so that it can be attached to the outer surface of the video cassette tape 15 as shown in FIG. 10 described above, for example.

Moreover, when the insulating sheet 27 is peeled off, the separation grooves 33a, 33b
The isolation region 37 surrounded by is separated from the insulating sheet 27 by the isolation grooves 33a and 33b and remains, and functions as an insulating layer between the jumper wire 29 and the coil 19. The insulation between 19 is maintained.

Therefore, pre-processing of both ends of the jumper wire 29 is not required, which facilitates manufacturing and contributes to cost reduction.

By the way, the insulating sheet 27 in the present invention is not limited to the structure of being attached to the entire surface of the substrate 17, but may be at least partially attached to the coil 19 between the connecting electrode 21 and the outer connecting portion 19b via the adhesive layer 25. Is also possible.

In the resonance tag 35 of the present invention, the formation position of the chip-shaped capacitor 23 is arbitrary, and the capacitor 23 is not limited to the configuration using the capacitor 23, but may be formed between the conductors of the coil 19 or the capacitor-forming electrodes (see FIG. A configuration in which a capacitor is formed between (not shown) is also possible.

Further, the separation grooves 33a and 33b in the present invention may be any separation means which can be easily separated at the time of peeling like perforations.

Next, an example of a method of manufacturing the resonance tag of the present invention will be described.

First, as shown in FIG. 1 described above, a coil 19 in which a conductive material is wound in a plurality of rectangular loops and a connection electrode 21 are formed on one surface of an insulating substrate 17 by a known method such as etching, On one surface of 17, a region including the inner connection portion 19a of the coil 19 and the end portion of the connection electrode 21 facing the inner connection portion 19a,
An adhesive layer 25 is applied from above the coil 19 while leaving the end region on the opposite side of the connection electrode 21 and the outer connection portion 19b region exposed, as shown in FIG.

Next, as shown in FIG. 6, the inner connecting portion 19a and the connecting electrode 2
An insulating sheet formed by punching out a first window 27a where one end is exposed, a second window 27b where the opposite end of the connection electrode 21 is exposed, and a third window 27c where the outer connection 19b is exposed. Prepare 27.

Then, as shown in FIG. 7, the insulating sheet 27 is attached to one surface of the substrate 17 via the adhesive layer 25, and the first window 27a is formed.
While soldering and connecting the chip-shaped capacitor 23 between the connection electrode 21 and the inner connection portion 19a so as to be positioned by,
The connection electrode 21 of the second window 27b and the outer connection portion 19 of the third window 27c
Solder the jumper wire 29 between b to complete.

After that, separation grooves 33a and 33b are formed in the insulating sheet 27 by a cutter (not shown) to complete the process.

The resonance tag 35 manufactured in this manner is an insulating sheet.
When 27 is peeled off, as shown in FIG. 8, the adhesive layer 25 appears and the separation region 37 surrounded by the separation grooves 33a and 33b is an insulating sheet.
It remains separated from 27 and functions as an insulating layer for the jumper wire 29, while it is easily attached to the surface of the product by the adhesive layer 25 for use.

The separation grooves 33a and 33b can be formed either before or after being attached to the substrate 17.

[Effects of the Invention] As described above, the resonance tag of the present invention has a loop-shaped coil formed on an insulating substrate, and is provided on at least a coil between both ends of the coil except near the both ends of the coil. An insulating sheet is attached via an adhesive layer, and both ends of the coil are short-circuited from above the insulating sheet with a jumper wire, and the insulating sheet is connected between the ends facing both ends of the coil and jumpers are connected to each other. Since the two separating means extending apart from the wire are formed, when the insulating sheet is peeled off, the adhesive layer is exposed after the peeling, and the coil and the jumper wire are separated by the two separating means. The region remains and functions as an insulating layer.

Therefore, it is possible to use a jumper wire that is not covered with insulation, and the manufacturing is simple and the cost can be reduced.

The products with the resonance tag of the present invention include books, records, stationery, in addition to the video cassette tapes described above.
It is suitable for use in relatively small items such as sundries that are displayed and sold in large numbers.

[Brief description of drawings]

1 and 2 are a plan view and a cross-sectional view (cross-section II-II in FIG. 1) showing an embodiment of the resonance tag according to the present invention.
FIG. 3 is an enlarged plan view showing an essential part of the resonance tag of FIG. 1, FIG. 4 is an equivalent circuit diagram of the resonance tag of FIG. 1, and FIGS. 5 to 7 are for manufacturing the resonance tag of the present invention. FIG. 8 is a plan view illustrating an example of using the resonance tag of the present invention, FIG. 9 is a plan view showing a conventional resonance tag, and FIG. 10 is a state in which the resonance tag is attached to a product. It is a perspective view shown. 1, 35 …… Resonance tag 3, 17 …… Substrate 5, 19 …… Coil 7 …… Connection electrode 9, 23 …… Capacitor 11, 29 …… Jumper wire 13, 31 …… Resonance circuit 15 …… Product (video) Cassette tape) 19a …… End part (connecting part) 19b …… End part (connecting part) 21 …… Inner end part (connecting electrode) 25 …… Adhesive layer 27 …… Insulating sheet 27a to 27c …… First to first 3 windows 33a, 33b ... Separation means (separation groove) 37 ... Separation area

Claims (1)

[Scope of utility model registration request] 1. A coil formed by planarly forming a plurality of turns of a conductor in a loop shape on one surface of an insulating substrate, a capacitor connected to the coil, and a coil of the coil except in the vicinity of both end portions of the coil. An insulating sheet attached at least on the coil between the two end portions via an adhesive layer, a jumper wire short-circuited between the two end portions of the coil on the insulating sheet, and an end facing the both end portions of the coil. Resonating tag having two separating means connected to each other and formed on the insulating sheet with the jumper wire therebetween.