RFID tags

Abstract

An RFID tag (1) comprises: an inlay (5) which is oblong and which includes a semiconductor element (7), a substrate (8) on which is formed an antenna pattern (9) that is connected to the semiconductor element (7), and a protective member that protects both surfaces of the substrate (8) in the thickness direction (Z direction); and a tube member (6) which is elastic and in which the inlay (5) is accommodated from one end (5A) to the other end (5B) in the longitudinal direction (Y direction) of the inlay (5). The inlay (5) is formed such that the size of the inlay (5) in the width direction (X direction) is smaller than the inner diameter of the tube member (6). An engaging part (12), extending in the width direction (X direction) of the inlay (5) and engaging with the inner surface (11) of the tube member (6), is formed at the other end (5B) in the longitudinal direction (Y direction) of the inlay (5).

Description

Technical Field

[0001] The present invention relates to an RFID tag.

Background Art

[0002] There is known an RFID (Radio Frequency Identification) element, so-called an inlay, which has a substrate provided with a semiconductor element and an antenna pattern, and both surfaces in the thickness direction of the substrate are protected by a protective member. This type of inlay is used, for example, as an RFID tag (IC (Integrated Circuit) tag) attached to linen such as clothes and towels in hotels, hospitals, etc. to manage the linen.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An RFID tag attached to linen tends to be subjected to external pressure such as centrifugal dehydration performed in the linen washing process. Therefore, in an RFID tag, in order to enhance the durability against external pressure, a structure in which an inlay is sandwiched between elastic members such as silicon rubber is conceivable. However, when manufacturing an RFID tag having such a structure, the process of adhering an elastic member so as to sandwich the inlay becomes complicated, and there is a problem that the productivity of the RFID tag is low. In particular, when manufacturing using an automatic machine, the decrease in productivity becomes remarkable, leading to an increase in equipment costs.

[0005] The disclosed technology has been made in view of the above, and an object thereof is to provide an RFID tag that can enhance durability, simplify the manufacturing process of the RFID tag, and improve productivity. [Means for solving the problem]

[0006] One embodiment of an RFID tag disclosed in this application comprises an elongated inlay having a semiconductor element, a substrate on which an antenna pattern connected to the semiconductor element is formed, and a protective member protecting both sides of the substrate in the thickness direction, and an elastic tube member in which the inlay is housed from one end to the other in the longitudinal direction of the inlay, wherein the inlay is formed such that its size in the short direction is smaller than the inner diameter of the tube member, and an engaging portion is formed at the other end of the inlay in the longitudinal direction, extending in the short direction of the inlay and engaging with the inner surface of the tube member. [Effects of the Invention]

[0007] According to one embodiment of the RFID tag disclosed in this application, durability can be increased, the manufacturing process of the RFID tag can be simplified, and productivity can be improved. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a plan view showing an RFID tag of an embodiment. [Figure 2] Figure 2 is a side view showing the RFID tag of the embodiment. [Figure 3] Figure 3 is a cross-sectional view showing an RFID tag of an embodiment. [Figure 4] Figure 4 is a cross-sectional view showing the tube member in the embodiment. [Figure 5] Figure 5 is a plan view showing an enlarged view of the engagement portion of the inlay in the embodiment. [Figure 6] Figure 6 is a cross-sectional view showing the inlay being inserted into the tube member in the embodiment. [Figure 7] Figure 7 is a plan view illustrating the usage of the RFID tag in the embodiment. [Figure 8] Figure 8 is a schematic diagram illustrating the RFID tag manufacturing apparatus of the embodiment. [Figure 9]Figure 9 is a cross-sectional view showing the main parts of a modified RFID tag. [Modes for carrying out the invention]

[0009] The following describes in detail, with reference to the drawings, an embodiment of the RFID tag disclosed in this application. However, the following embodiment does not limit the RFID tag disclosed in this application. [Examples]

[0010] (RFID tag) Figure 1 is a plan view showing the RFID tag of the embodiment. Figure 2 is a side view showing the RFID tag of the embodiment. Figure 3 is a cross-sectional view showing the RFID tag of the embodiment.

[0011] As shown in Figures 1, 2, and 3, the RFID tag 1 of the embodiment is formed in a rectangular, elongated shape and comprises an elongated inlay 5 having a semiconductor element 7 and an antenna pattern (antenna element) 9, and an elastic tube member 6 in which the inlay 5 is housed from one end 5A to the other end 5B in the longitudinal direction of the inlay 5. In this way, the RFID tag 1 has enhanced durability against external pressure applied to the inlay 5 due to the elasticity of the tube member 6, as the inlay 5 is housed inside the tube member 6.

[0012] For the sake of explanation, in Figure 1, the short side of RFID tag 1 is referred to as the X direction, the long side of RFID tag 1 as the Y direction, and the thickness direction of RFID tag 1 as the Z direction. In other words, the short side of the inlay 5 of RFID tag 1 is referred to as the X direction, the long side of inlay 5 and the tube axis direction (longitudinal direction) of the tube member 6 is referred to as the Y direction, and the thickness direction of inlay 5 is referred to as the Z direction. In subsequent drawings, the X, Y, and Z directions will be indicated in the same way as in Figure 1.

[0013] (Inlay) The inlay 5 includes a semiconductor element 7, a long substrate 8 on which an antenna pattern 9 connected to the semiconductor element 7 is formed, and a protective film 10 provided as a protective member for protecting both surfaces in the thickness direction (Z direction) of the substrate 8, and is formed in a long shape with a rectangular outer shape. As an example, the inlay 5 is formed such that the length dimension in the longitudinal direction (Y direction) is about 50 [mm], the width dimension in the short transverse direction (X direction) is about 4.5 [mm], and the thickness dimension in the thickness direction (Z direction) is less than 1 [mm].

[0014] The semiconductor element 7 is, for example, an IC (integrated circuit), and is disposed at the center in the longitudinal direction (Y direction) of the substrate 8 and at the center in the short transverse direction (X direction) of the substrate 8 on the substrate 8. The protective film 10 is formed of a resin material such as PET (polyethylene terephthalate), for example, and is attached to both surfaces of the substrate 8 with an adhesive.

[0015] The inlay 5 is formed such that the size in the short transverse direction (X direction) of the inlay 5 is smaller than the inner diameter of the tube member 6. Further, an engaging portion 12 that engages with the inner surface 11 of the tube member 6 is formed at the other end portion 5B in the longitudinal direction (Y direction) of the inlay 5. The engaging portion 12 extends outward in the short transverse direction (X direction) of the inlay 5 from the side surface 17 in the short transverse direction (X direction) of the inlay 5.

[0016] In other words, on the inlay 5, on the opposite side of the one end portion 5A side inserted into the tube member 6, that is, on the rear end side in the insertion direction (Y direction) with respect to the front end side in the insertion direction (Y direction) into the tube member 6, an engaging portion 12 is formed (see FIG. 6).

[0017] The inlay 5 inserted into the tube member 6 is easily fixed at a predetermined position inside the tube member 6 when the engaging portion 12 is engaged with the inner surface 11 of the tube member 6. Therefore, the engaging portion 12 functions as a position regulating portion for regulating the position of the inlay 5 with respect to the tube axis direction (Y direction) of the tube member 6. Details of the shape of the engaging portion 12 will be described later.

[0018] (Tube member) FIG. 4 is a cross-sectional view showing the tube member 6 in the embodiment. As shown in FIGS. 1, 2, and 4, the tube member 6 is formed as an elliptical tube having an elliptical cross-sectional shape made of an elastic material such as silicone rubber. In other words, in a cross-section orthogonal to the longitudinal direction (Y direction) of the RFID tag 1, the tube member 6 is formed in a flat shape whose cross-sectional shape is crushed in the thickness direction (Z direction) of the inlay 5. As an example, the tube member 6 is formed such that the length dimension in the tube axis direction (Y direction) is about 60 [mm], the outer diameter dimension in the major diameter direction (X direction) is about 6.5 [mm], and the outer diameter dimension in the minor diameter direction (Z direction) is about 2.5 [mm].

[0019] Thereby, it is possible to suppress the generation of a gap between both surfaces 13 (see FIG. 2) in the thickness direction (Z direction) of the inlay 5 and the inner surface 11 of the tube member 6, suppress the movement of the inlay 5 in the thickness direction (Z direction) inside the tube member 6, and prevent damage to the inlay 5 and the dropout of the inlay 5 from the tube member 6. Note that the tube member 6 is not limited to an elliptical tube, and may be formed in other shapes such as a square tube having a rectangular cross-sectional shape.

[0020] (Shape of engaging portion) FIG. 5 is a plan view showing an enlarged view of the engaging portion 12 of the inlay 5 in the embodiment. FIG. 6 is a cross-sectional view showing a state in which the inlay 5 is inserted into the tube member 6 in the embodiment. As shown in FIGS. 3 and 5, the engaging portions 12 of the inlay 5 are formed on both sides in the short side direction (X direction) of the inlay 5. Each engaging portion 12 is formed symmetrically with respect to the center line C in the short side direction (X direction) of the inlay 5. The engaging portion 12 is formed by cutting the substrate 8 to which the protective film 10 is adhered into a desired outer shape by press working. As an example, the engaging portion 12 is formed such that the protruding amount from the side surface 17 of the inlay 5 is about 0.5 [mm] in the short side direction (X direction) of the inlay 5. Further, the engaging portion 12 is formed to be about 4 [mm] with respect to the longitudinal direction (Y direction) of the inlay 6.

[0021] As shown in Figure 5, the engaging portion 12 has an inclined surface 15 formed on one end 5A side of the inlay 5, which is inclined with respect to the longitudinal direction (Y direction) of the inlay 5. The inclined surface 15 is inclined at an obtuse angle θ1 with respect to the outer peripheral surface 16 that extends along the longitudinal direction (Y direction) of the inlay 5 in the engaging portion 12. Furthermore, the inclination angle θ2 that the inclined surface 15 makes with the side surface 17 of the inlay 5 and the virtual surface D extended along the longitudinal direction (Y direction) of the inlay 5 is set to, for example, about 30 degrees, and preferably 45 degrees or less.

[0022] As a result, as shown in Figure 6, when the engaging portion 12 of the inlay 5 is inserted into the inner surface 11 of the tube member 6, the inner surface 11 of the tube member 6 becomes more slippery along the inclined surface 15, reducing the insertion load generated when the engaging portion 12 is inserted into the tube member 6. Consequently, damage such as buckling of the inlay 5 due to the insertion load applied near the engaging portion 12 when the engaging portion 12 is inserted into the tube member 6 is prevented, and the engaging portion 12 can be inserted smoothly and properly engaged with the inner surface 11 of the tube member 6.

[0023] Furthermore, the engaging portion 12 has a corner portion 20 formed on the side opposite to the end portion 5A of the inlay 5. The corner portion 20 is formed by an outer peripheral surface 18 extending along the longitudinal direction (Y direction) of the inlay 5 and the other end surface 5b, which will be described later, extending along the short direction (X direction) of the inlay 5. As a result, when the engaging portion 12 engages with the inner surface 11 of the tube member 6, the corner portion 20 bites into the inner surface 11 of the tube member 6, enhancing the effect of restricting the movement of the engaging portion 12 in the axial direction (Y direction) of the tube member 6. Therefore, the movement of the inlay 5 in the longitudinal direction (Y direction) inside the tube member 6 can be appropriately restricted. In addition, if the corner portion 20 has, for example, a right-angle corner, it becomes easier to maintain the position where it bites into the inner surface 11 of the tube member 6, further enhancing the effect of restricting the movement of the inlay 5 inside the tube member 6.

[0024] In addition, because the engaging portion 12 has a corner portion 20, the effect of restricting the movement of the engaging portion 12 is enhanced as described above. Therefore, even if the insertion amount of the engaging portion 12 in the axial direction (Y direction) of the tube member 6 is reduced, the inlay 5 can be prevented from falling off the tube member 6. As a result, by reducing the insertion amount of the engaging portion 12, the overall length of the tube member 6 can be reduced, and the RFID tag 1 can be miniaturized.

[0025] Furthermore, since the engaging portions 12 are formed on both sides of the inlay 5 in the short direction (X direction), when inserting the inlay 5 from one end 5A to the engaging portion 12 into the tube member 6, the inlay 5 can be inserted smoothly without contacting the inner surface 11 of the tube member 6, and when the insertion operation of the inlay 5 is completed, each engaging portion 12 can be engaged with the inner surface 11 of the tube member 6. In other words, the insertion load generated on the inlay 5 when inserting it into the tube member 6 is suppressed, and the movement of the inlay 5 inside the tube member 6 can be appropriately restricted by each engaging portion 12.

[0026] As shown in Figures 1, 2, and 3, the inlay 5 housed in the tube member 6 has one end face 5a of one end 5A and the other end face 5b of the other end 5B located inside the tube member 6. In the tube axis direction (Y direction) of the tube member 6, the first distance L1 from one end face 5a of the inlay 5 to one end face 6a of the tube member 6 located on the end 5A side is greater than the second distance L2 from the other end face 5b of the inlay 5 to the other end face 6b of the tube member 6 located on the end 5B side. In other words, the RFID tag 1 satisfies the condition that the first distance L1 and the second distance L2 are L1 > L2. As an example, the first distance L1 is set to about 5 [mm] and the second distance L2 is set to about 2 [mm].

[0027] As described above, the inlay 5 has an inclined surface 15 and a corner 20 in the engaging portion 12, so that inside the tube member 6, the engaging portion 12 tends to move towards the inclined surface 15 rather than towards the corner 20 in the longitudinal direction (Y direction) of the inlay 5. In other words, inside the tube member 6, the engaging portion 12 tends to move more easily towards the front end (one end 5A) in the insertion direction (Y direction) than towards the rear end (other end 5B) in the insertion direction (Y direction) of the inlay 5. Taking this tendency into consideration, by ensuring that the first distance L1 is larger than the second distance L2 as described above, it is possible to appropriately prevent the inlay 5 from falling out of the tube member 6 even when the inlay 5 moves to one end 5A inside the tube member 6.

[0028] Figure 7 is a plan view illustrating the usage state of the RFID tag 1 of the embodiment. As shown in Figure 7, the RFID tag 1 of the embodiment may include a bag 22 made of nonwoven fabric or cloth that further houses the tube member 6. The bag 22 is formed to surround the entire circumference of the tube member 6 and is fixed to the linen 23 by an adhesive member (not shown), such as adhesive tape. This makes the feel of the RFID tag 1 similar to that of the linen 23 by the cloth bag 22, and also makes it possible to hide the RFID tag 1 from view by the bag 22. Therefore, the deterioration of the feel of the linen 23 to which the RFID tag 1 is attached is suppressed, and the change in the appearance of the linen 23 is suppressed.

[0029] (RFID tag manufacturing equipment) The manufacturing apparatus for the RFID tag 1 described above will now be explained. Figure 8 is a schematic diagram illustrating the manufacturing apparatus for the RFID tag 1 in the embodiment.

[0030] As shown in Figure 8, the manufacturing apparatus 30 used in the manufacturing process of the RFID tag 1 comprises a guide jig 31 on which the tube member 6 and the inlay 5 are placed, and a plunger 32 that is pressed against the guide jig 31. The guide jig 31 has a holding recess 31a for holding the tube member 6, and a guide groove 31b for guiding the inlay 5 in the insertion direction relative to the tube member 6 held in the holding recess 31a. The manufacturing apparatus 30 also comprises, although not shown, a supply mechanism for supplying the tube member 6 and the inlay 5 to the guide jig 31, a moving mechanism for moving the plunger 32, and a control unit for controlling each of the mechanisms.

[0031] By using the manufacturing apparatus 30 described above, the inlay 5 can be easily inserted into the tube member 6, and the inlay 5 can be easily fixed inside the tube member 6 by the engaging portion 12. This simplifies the manufacturing process of the RFID tag 1 and increases the productivity of the RFID tag 1.

[0032] (How to manufacture RFID tags) The method for manufacturing the RFID tag 1 described above includes inserting the inlay 5 into the tube member 6, accommodating the inlay 5 inside the tube member 6 from one end 5A to the other end 5B in the longitudinal direction (Y direction) of the inlay 5, and engaging the engaging portion 12 of the inlay 5 with the inner surface 11 of the tube member 6.

[0033] (Effects of the example) As described above, the RFID tag 1 of the embodiment comprises a long inlay 5 and an elastic tube member 6 in which the inlay 5 is housed from one end 5A to the other end 5B in the longitudinal direction (Y direction) of the inlay 5. The inlay 5 is formed such that its size in the short direction (X direction) is smaller than the inner diameter of the tube member 6, and an engaging portion 12 is formed at the other end 5B in the longitudinal direction (Y direction) of the inlay 5, extending in the short direction (X direction) of the inlay 5 and engaging with the inner surface 11 of the tube member 6. This enhances the durability of the RFID tag 1 against external pressure applied during washing, such as during pressure dewatering, by the elasticity of the tube member 6, and prevents the inlay 5 from falling out of the tube member 6 by inserting the inlay 5 into the tube member 6 and fixing it with the engaging portion 12. Therefore, the RFID tag 1 enhances durability, simplifies the manufacturing process of the RFID tag 1, and increases productivity.

[0034] Furthermore, in the RFID tag 1 of the embodiment, the engaging portion 12 of the inlay 5 has an inclined surface 15 formed on one end 5A side of the engaging portion 12 of the inlay 5, which is inclined with respect to the longitudinal direction (Y direction) of the inlay 5. The inclined surface 15 is inclined at an obtuse angle θ1 with respect to the outer peripheral surface 18 that extends along the inner surface 11 of the tube member 6 in the engaging portion 12. As a result, when the engaging portion 12 of the inlay 5 is inserted into the inner surface 11 of the tube member 6, the inner surface 11 of the tube member 6 slides more easily along the inclined surface 15, reducing the insertion load generated when inserting the engaging portion 12 into the tube member 6. Consequently, damage such as buckling of the inlay 5 due to the insertion load applied near the engaging portion 12 when inserting the engaging portion 12 into the tube member 6 is prevented, and the engaging portion 12 can be smoothly inserted and properly engaged with the inner surface 11 of the tube member 6.

[0035] Furthermore, the engagement portion 12 of the inlay 5 in the RFID tag 1 of the embodiment has a corner portion 20 formed on the side opposite to the end portion 5A of the inlay 5. The corner portion 20 is formed by an outer peripheral surface 18 extending along the longitudinal direction (Y direction) of the inlay 5 and the other end surface 5b extending along the short direction (X direction) of the inlay 5. As a result, when the engagement portion 12 engages with the inner surface 11 of the tube member 6, the corner portion 20 bites into the inner surface 11 of the tube member 6, enhancing the effect of restricting the movement of the engagement portion 12 relative to the tube member 6. Therefore, the movement of the inlay 5 in the longitudinal direction (Y direction) within the tube member 6 can be appropriately restricted. In addition, since the effect of restricting the movement of the engagement portion 12 is enhanced by the corner portion 20, the inlay 5 can be prevented from falling out of the tube member 6 even when the insertion amount of the engagement portion 12 inserted in the tube axis direction (Y direction) of the tube member 6 is reduced. As a result, by reducing the insertion amount of the engaging portion 12, the overall length of the tube member 6 can be reduced, making the RFID tag 1 smaller.

[0036] Furthermore, in the RFID tag 1 of the embodiment, the tube member 6 is formed with a flattened cross-sectional shape that is compressed in the thickness direction (Z direction) of the inlay 5. This suppresses the formation of gaps between both sides 13 in the thickness direction (Z direction) of the inlay 5 and the inner surface 11 of the tube member 6, thereby suppressing the movement of the inlay 5 in the thickness direction (Z direction) within the tube member 6 and preventing damage to the inlay 5 and detachment of the inlay 5 from the tube member 6.

[0037] Furthermore, in the RFID tag 1 of the embodiment, the inlay 5 has one end face 5a of one end 5A and the other end face 5b of the other end 5B located inside the tube member 6. In the tube axis direction (Y direction) of the tube member 6, the first distance L1 from the end face 5a of the inlay 5 to the end face 6a of the tube member 6 located on the end 5A side is greater than the second distance L2 from the other end face 5b of the inlay 5 to the other end face 6b of the tube member 6 located on the other end 5B side. Because the engaging portion 12 of the inlay 5 has an inclined surface 15 and a corner portion 20, the engaging portion 12 tends to move towards the inclined surface 15 rather than towards the corner portion 20 in the longitudinal direction (Y direction) of the inlay 5 inside the tube member 6. Taking this tendency into consideration, by ensuring that the first distance L1 is greater than the second distance L2, it is possible to appropriately prevent the inlay 5 from falling out of the tube member 6 even if the inlay 5 moves to the end 5A inside the tube member 6.

[0038] Furthermore, in the RFID tag 1 of the embodiment, the engagement portion 12 of the inlay 5 is formed on both sides in the short direction (X direction) of the inlay 5. This allows for smooth insertion of the inlay 5 into the tube member 6, avoiding contact between the inlay 5 and the inner surface 11 of the tube member 6 when inserting the inlay 5 from one end 5A to the engagement portion 12, and allows each engagement portion 12 to engage with the inner surface 11 of the tube member 6 when the insertion operation of the inlay 5 is completed. In other words, it reduces the insertion load on the inlay 5 when inserting it into the tube member 6, and allows for appropriate restriction of the movement of the inlay 5 inside the tube member 6 by each engagement portion 12.

[0039] Furthermore, the RFID tag 1 of the embodiment includes a bag 22 made of nonwoven fabric or cloth that houses the tube member 6, and the bag 22 is formed to surround the entire circumference of the tube member 6. This makes the feel of the RFID tag 1 similar to linen 23 by the cloth bag 22, and also makes it possible to conceal the RFID tag 1 from its appearance by the bag 22. Therefore, the deterioration of the feel of the linen 23 to which the RFID tag 1 is attached is suppressed, and the change in the appearance of the linen 23 is suppressed.

[0040] The following describes modified examples with reference to the drawings. In the modified examples, components identical to those in the embodiment are denoted by the same reference numerals as in the embodiment, and their descriptions are omitted.

[0041] (modified version) Figure 9 is a cross-sectional view showing the main part of a modified RFID tag. As shown in Figure 9, the modified RFID tag 2 differs from the embodiment in that the inlay 5 has an engaging portion 12 formed only on one side in the short direction (X direction) of the inlay 5. In the modified example, the inlay 5 is formed so as to be in contact with the inner surface 11 of the tube member 6 over the entire side surface 17 on the opposite side of the short direction (X direction) of the inlay 5 from the side on which the engaging portion 12 is formed.

[0042] In the modified form, as in the actual implementation, the elasticity of the tube member 6 enhances the durability of the inlay 5 against external pressure, and inserting the inlay 5 into the tube member 6 and securing it with the engaging portion 12 prevents the inlay 5 from falling out of the tube member 6. Therefore, in the modified form as well, durability is enhanced, the manufacturing process of the RFID tag 2 is simplified, and productivity is increased.

[0043] Furthermore, in the modified example, when inserting the inlay 5 into the tube member 6, the other side surface 17 in the short direction (X direction) of the inlay 5, where the engaging portion 12 is not formed, contacts the inner surface 11 of the tube member 6 over its entire length from one end 5A to the other end 5B. Although this increases the insertion load compared to the embodiment, it increases the contact area between the inner surface 11 of the tube member 6 and the inlay 5, further enhancing the effect of restricting the movement of the inlay 5. [Explanation of Symbols]

[0044] 1 RFID tag 5 Inlays 5A One end 5a One end face 5B Other end 5b Other end face (end face) 6 Tube members 7. Semiconductor buttons 9 Antenna Patterns 8 circuit boards 10. Protective film (protective material) 11. Inner self 15 Slope 18 Outer surface 20 corners 22 Bag body L1 1st distance L2 2nd distance X Short direction Y: Longitudinal direction, axial direction of the pipe Z-axis thickness direction θ1 obtuse angle

Claims

1. A long inlay comprising a semiconductor element, a substrate on which an antenna pattern connected to the semiconductor element is formed, and protective members that protect both sides of the substrate in the thickness direction, The inlay comprises an elastic tubular member housed from one end to the other in the longitudinal direction of the inlay, The RFID tag is characterized in that the inlay is formed such that its size in the short direction is smaller than the inner diameter of the tube member, and an engaging portion is formed at the other end of the inlay in the longitudinal direction, extending in the short direction of the inlay and engaging with the inner surface of the tube member.

2. The engaging portion has an inclined surface formed on one end side of the engaging portion, which is inclined with respect to the longitudinal direction of the inlay. The inclined surface is inclined at the engaging portion at an obtuse angle with respect to the outer circumferential surface that extends along the inner surface of the tube member. The RFID tag according to claim 1.

3. The engagement portion has a corner formed on the side opposite to the one end of the engagement portion, The aforementioned corner is formed by an outer peripheral surface extending along the longitudinal direction of the inlay and an end surface extending along the short direction of the inlay. The RFID tag according to claim 2.

4. The tube member is formed with a flattened cross-sectional shape that is compressed in the thickness direction of the inlay. The RFID tag according to claim 1.

5. The inlay has one end face of one end and the other end face of the other end located inside the tube member. In the axial direction of the tube member, the first distance from one end face of the inlay to one end face of the tube member located on the one end side is greater than the second distance from the other end face of the inlay to the other end face of the tube member located on the other end side. The RFID tag according to claim 3.

6. The engagement portion is formed on both sides of the inlay in the short direction. The RFID tag according to claim 1.

7. The invention further comprises a bag made of nonwoven fabric or cloth, which contains the tube member, The bag is formed to surround the entire circumference of the tube member. The RFID tag according to claim 1.

Images