JP7119637B2 - How to attach the RF tag label - Google Patents

Description

The present invention relates to an RF tag label that is a labeled RF tag (RF: Radio Frequency) used for wireless individual identification.

The use of RF tag labels, which are RF tags used for wireless individual identification as seal labels, for managing merchandise sold in stores has been studied for some time. When using the RF tag label for merchandise management, it is necessary to attach the RF tag label to the merchandise to be managed and attach the RF tag label to the merchandise to be managed.

The RF tag label attached to the product may be used in its entirety, but it is desirable to use it in a partially detached state, such as when the product is being settled or when the sales of the product after payment are totaled. There is also Therefore, RF tag labels used for product management are required to be usable not only in a complete state but also in a partially separated state. Note that the use of the RF tag label means that predetermined data can be read from the RF tag label wirelessly.

As an RF tag label that can be used in either a complete state or a partially separated state, the applicant of the present application discloses an RF tag label in Patent Document 1 in which the RF tag portion can be easily separated. The RF tag label disclosed in Patent Document 1 is processed with cut perforations used for separating the RF tag portion. The RF tag portion operates either before being separated from the RF tag label or separated from the RF tag label along the perforations.

JP 2005-196377 A

In the invention disclosed in Patent Document 1, the structure of the RF tag does not change before or after being separated from the RF tag label, and the communication distance of the RF tag does not change. . When the RF tag label is used for product management, the communication distance of the RF tag label in a complete state requires a distance of several meters. As a result, for example, erroneous recognition of the RF tag label is likely to occur at the time of product checkout. Therefore, it is desirable to shorten the communication distance of the RF tag label in a partially separated state.

Therefore, the present invention provides an RF tag label that can be used in either a complete state or a partially cut off state, and the communication distance of the cut off state is shorter than the communication distance of the complete state. intended to provide

A first invention for solving the above-mentioned problems has a loop-shaped matching element to which an IC chip is connected, a meander-shaped linear element, and a plate-shaped planar element, and one end of the linear element is connected to the matching element. and an inlay mounted with an antenna having a structure in which the matching element is connected to the planar element using a waveguide line; and a first adhesive layer laminated on the surface of the inlay mounted with the antenna. , a release paper covering the first adhesive layer is provided, and a breaking line for separating a portion including the linear element, the matching element and a part of the waveguide line as a tear-off tag is provided between the matching element and the planar shape. A method for attaching an RF tag label characterized by being processed between elements, wherein the planar element of the antenna overlaps at least the surface of the object, and the breaking line processed on the RF tag label is the object A method for attaching an RF tag label characterized by attaching the RF tag label to an object so as to form a boundary with the object. In order to be able to tear off the tear-off tag from the RF tag label attached to the object, it is necessary to attach the RF tag label to the object as described above. In addition, when attaching to a surface that has characteristics that hinder wireless communication, such as a metal surface, it is necessary to attach the RF tag label to the object so that the break line processed on the RF tag label becomes the boundary with the object. is .

According to the above-described invention, the RF tag label can be used in either a complete state or a partially cut off state, and the communication distance of the cut off state is shorter than the communication distance of the complete state. can provide

An RF tag label according to this embodiment will be described. The figure explaining the inlay with which RF tag label is provided. FIG. 4 is a diagram for explaining a tear-off tag that can be cut from an RF tag label; FIG. 4 is a diagram for explaining how to attach an RF tag label; FIG. 4 is a diagram for explaining a usage example of a tear-off tag cut out from an RF tag label;

Preferred embodiments of the invention will now be described. The following description does not limit the technical scope of the present invention, but is provided to aid understanding of the present invention.

1A and 1B are diagrams for explaining the RF tag label 1 according to the present embodiment, FIG. 1A is a diagram for explaining the appearance of the RF tag label 1, and FIG. It is a figure to do.

The RF tag label 1 according to this embodiment is in the form of a substantially rectangular seal label having a first adhesive layer 11 covered with a release paper 12, as shown in FIG. 1(a), and functions as an RF tag. Therefore, the antenna 2 to which the IC chip 24 is connected is mounted inside.

The frequency band used by the RF tag label 1 is the UHF band (860 to 960 Mhz), and the antenna 2 mounted inside the RF tag label 1 consists of a loop-shaped matching element 21 to which an IC chip 24 is connected, and a meander-shaped linear element. 20 and a planar planar element 22, one end of the meandering linear element 20 is connected to the matching element 21, and the matching element 21 is connected to the planar planar element 22 using a waveguide line 23. It has a connected structure.

Also, in the RF tag label 1, a perforation line 15 for separating (tearing off) the RF tag label 1 from a portion including the linear element 20, the matching element 21 and part of the waveguide line 23 is used as a tear-off tag 1a. is processed. In FIG. 1(a), a transverse breaking line 15 is machined between the matching element 21 and the planar element 22. In FIG. Note that "tear-off" means the action of tearing off, and the tear-off tag 1a means an RF tag that is separated from the RF tag label 1. FIG.

As illustrated in FIG. 1B, the RF tag label 1 according to the present embodiment includes an inlay 10 mounted with the antenna 2 described above and a first adhesive layer laminated on the antenna mounting surface of the inlay 10 mounted with the antenna 2. 11, a release paper 12 for protecting the first adhesive layer 11, a second adhesive layer 13 laminated on the back surface of the antenna mounting surface of the inlay 10, and the second adhesive layer 13 is used to adhere to the inlay 10. The top sheet 14 is formed, and the breaking lines 15 are processed in each layer of the RF tag label 1 . Note that the RF tag label 1 can also have a configuration in which the second adhesive layer 13 and the surface sheet 14 are omitted.

Materials for the RF tag label 1 will be described. For the base film and surface sheet 14 that serve as the base of the inlay 10, in addition to synthetic resin films such as polyethylene terephthalate (PET) and polypropylene (PP), art paper and the like can be used. Metal foil such as aluminum foil can be used for 2 . Also, an acrylic or rubber-based adhesive can be used for the first adhesive layer 11 and the second adhesive layer 13 . Furthermore, as the release paper 12, a synthetic resin film coated with a release agent such as silicone or paper coated with a release agent can be used.

FIG. 2 is a diagram for explaining the inlay 10 included in the RF tag label 1. FIG. The structure of the antenna 2 mounted on the inlay 10 of the RF tag label 1 will be described with reference to FIG.

The antenna 2 mounted on the inlay 10 is a dipole antenna, and has the matching element 21 to which the IC chip 24 is connected, the meandering linear element 20, and the planar planar element 22, as described above. One end of the linear element 20 is connected to the matching element 21 , and the matching element 21 is connected to the planar element 22 using the waveguide line 23 .

A matching element 21 constituting the antenna 2 is an antenna element for impedance matching with an IC chip 24 mounted on the inlay 10 . Since a capacitive reactance (capacitance) exists between the input terminals of the IC chip 24, the shape of the matching element 21 connected to the IC chip 24 is made into a loop shape so that the capacitive reactance existing between the input terminals of the IC chip 24 is eliminated. The matching element 21 has a corresponding inductive reactance (inductance).

The linear element 20 of the antenna 2 mounted on the RF tag label 1 is a radiating element in the shape of a linear conductor bent in a zigzag shape, and the planar element 22 is a plate-like radiating element such as a plate electrode. . It can be used in either a complete state or a partially cut state, and the RF The tag label 1 is processed with a breaking line 15 so that one radiating element can be cut out from the antenna 2 , and the radiating element cut out from the antenna 2 becomes a planar element 22 .

When the RF tag label 1 is used for merchandise management, it is necessary to obtain a communication distance (for example, up to several meters) required for merchandise management while attached to the merchandise. In order to obtain a communication distance necessary for product management while attached to the product, the plate-shaped planar element 22 widens the band of the antenna 2 in the perfect state, and the meander-shaped linear element The antenna length of the antenna 2 is adjusted by 20 to correspond to the wavelength of the UHF band.

The meandering linear element 20 is used not only for adjusting the antenna length of the antenna 2 but also for adjusting the resonance frequency of the RF tag label 1 . The meandering linear element 20 of the antenna 2 mounted on the RF tag label 1 has a U-shaped portion, and the U-shaped portion has an inductive reactance. By utilizing the inductive reactance of the U-shaped portion, the resonance frequency of the RF tag label 1 before tearing off the tear-off tag 1a can be adjusted to a predetermined frequency.

The plate-shaped planar element 22 is used not only to widen the band of the antenna 2 but also to make the RF tag label 1 versatile. Some of the products sold at retail stores include drinking water (e.g., canned coffee) in metal cans or PET bottles, and food (e.g., potato chips) in bags made of vapor-deposited film. ), there are many types of products that have characteristics that hinder wireless communication. Assuming that the RF tag label 1 is attached to all the products sold at the retail store, the RF tag label 1 is required to be versatile enough to handle all the products sold at the retail store. Since the planar element 22 of the antenna 2 mounted on the RF tag label 1 has a plate-like shape, the RF tag label 1 can be printed by attaching the RF tag label 1 to the product so that only the planar element 22 overlaps the product. can be made versatile. For example, when the planar element 22 is attached to a metal surface, the planar element 22 is electrostatically coupled to the metal surface, and the antenna 2 and the metal surface form a dipole antenna, so the communication distance of the RF tag label 1 does not significantly deteriorate. .

FIG. 3 is a diagram for explaining a tear-off tag 1a that can be cut from the RF tag label 1. FIG. 3 shows the appearance of the tear-off tag 1a. As shown in FIG. 3, the tear-off tag 1a includes a loop-shaped matching element 21 to which an IC chip 24 is connected, a meander-shaped linear element 20, and a planar element 22 which is a tear-off element. Not included in tag 1a. In addition to the matching element 21 and the linear element 20, the tear-off tag 1a of the present embodiment includes part of the waveguide line 23 connecting the matching element 21 and the planar element 22. FIG.

Since the tear-off tag 1a illustrated in FIG. 3 does not include the planar element 22, it is difficult to read data using an electric field with the tear-off tag 1a. Although the communication distance is shortened, it is possible to wirelessly read data from the tear-off tag 1a.

Design guidelines for the RF tag label 1 will now be described. Considering that the RF tag label 1 is attached to a product sold at a store, it is desirable to set the size of the antenna 2 mounted on the RF tag label 1 as shown in Table 1 . The reason why Table 1 defines only the vertical size of the antenna 2 is that the vertical size of the RF tag label 1 is directly related to the length of the RF tag label 1 protruding from the product. The horizontal size of the antenna 2 is used to adjust the resonance frequency of the RF tag label 1, and the horizontal size of the antenna 2 is determined so as to achieve a predetermined resonance frequency.

In addition, the RF tag label 1 can be used in either a complete state or a partially cut state, and considering that the RF tag label 1 is attached to a metal surface, the resonance frequency of the RF tag label 1 is It becomes necessary to design the antenna 2 so as to satisfy 2 . Furthermore, considering that the RF tag label 1 is attached to a surface having dielectric properties, it is necessary to design the antenna 2 so that the resonance frequency of the RF tag label 1 satisfies Tables 2 and 3 . Note that the resonance frequency of the tear-off tag 1a cut from the RF tag label 1 whose resonance frequency has been adjusted in this way is about 1.3 GHz, and the communication distance of the tear-off tag 1a is about half the communication distance of the RF tag label 1 (several tens of cm). ).

From here, the method of attaching the RF tag label 1 described so far will be described. FIG. 4 is a diagram for explaining how to attach the RF tag label 1, FIG. 4(a) is a diagram for explaining how to attach the RF tag label 1, and FIG. 1 is a cross-sectional view of (here, a product whose container is a metal can) and an RF tag label 1. FIG.

In FIG. 4( a ), the RF tag label 1 is attached to the object 3 so that the planar element 22 of the antenna 2 overlaps at least the object 3 . Moreover, in FIG. 4(a), since the target object 3 is a product whose container is a metal can, in order to separate the tear-off tag 1a from the metal surface, the fracture line 15 processed in the RF tag label 1 is aligned with the target object 3. An RF tag label 1 is attached to an object 3 so as to be on the boundary between . As shown in Fig. 4(a), by attaching the RF tag label 1 to the object 3, the part protruding from the object 3 becomes smaller than the part that becomes the tear-off tag 1a, and the part protruding from the object 3 becomes Compact. As shown in FIG. 4(a), when attaching the RF tag label 1 to the object 3, as shown in FIG. The release paper 12 is peeled off, and the portion of the first adhesive layer 11 exposed by the peeling of the release paper 12 is used for attaching the RF tag label 1 .

FIG. 5 is a diagram illustrating an example of use of the tear-off tag 1a cut from the RF tag label 1. FIG. FIG. 5(a) is a diagram for explaining how to cut the tear-off tag 1a, and FIG. 5(b) is a diagram for explaining a usage example of the tear-off tag 1a cut from the RF tag label 1. FIG.

As shown in FIG. 5(a), the portion 1b of the RF tag label 1 on which the planar element 22 is mounted remains attached to the object 3 by breaking the perforated breaking line 15. , the tear-off tag 1a can be cut off from the RF tag label 1. In addition to the planar element 22, when the RF tag label 1 is attached to the target object 3 so that a part of the tear-off tag 1a overlaps the target object 3, the release paper 12 that becomes the tear-off tag 1a is peeled off, A tear-off tag 1 a can be cut from the RF tag label 1 . In addition, when the RF tag label 1 is attached to the object 3 so that the planar element 22 overlaps the object 3 and the breaking line 15 is the boundary with the object 3, the release paper 12 that becomes the tear-off tag 1a , the tear-off tag 1a can be cut off from the RF tag label 1.

As described above, the RF tag label 1 according to the present embodiment is configured so that the tear-off tag 1a cut out from the RF tag label 1 operates. can be used for the settlement of the product, which is the target object 3, or the like. When the tear-off tag 1a is used for product checkout, etc., the first adhesive layer 11 on the back surface of the tear-off tag 1a is used to arrange the tear-off tag 1a on a backing paper in a matrix form, as shown in FIG. 5(b). By sticking, it becomes possible to read data from a plurality of tear-off tags 1a all at once.

1 RF tag label 1a tear-off tag 10 inlay 11 first adhesive layer 11
REFERENCE SIGNS LIST 12 release paper 15 breaking line 2 antenna 20 linear element 21 matching element 22 planar element 23 waveguide line 24 IC chip

Claims (1)

It has a loop-shaped matching element to which an IC chip is connected, a meander-shaped linear element, and a plate-shaped planar element, one end of the linear element is connected to the matching element, and a waveguide line is used. An inlay mounted with an antenna having a structure in which the matching element is connected to the planar element, a first adhesive layer laminated on the surface of the inlay mounted with the antenna, and release paper covering the first adhesive layer and a break line is processed between the matching element and the planar element for separating a portion including the linear element, the matching element, and a part of the waveguide line as a tear-off tag. A mounting method of
Attaching the RF tag label to an object so that the planar element of the antenna overlaps at least the surface of the object, and the breaking line processed in the RF tag label is a boundary with the object;
A method for attaching an RF tag label, characterized by:

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