JP2005141376A - Rfid tag having impact resistant mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an RFID tag for preventing a built-in element from being damaged even if it is dropped from the extent of a height making a built-in element of a conventional RFID tag to be damaged and even if it is applied with a heavy load. <P>SOLUTION: The RFID tag has a tabular built-in element 2 with a magnetic body 2a and a coil 2b, etc. integrally molded therein and a case 3 having a tabular appearance covering the surround of the element 2. The RFID tag has an impact resistant mechanism in which a continuous projection part 5 as a protrusion part to prevent the element 2 from being damaged by absorbing energy of impact given to the case 3 is disposed outside an outer edge of the element 2 on a wide surface of the case 3. A support post being disposed inside the case 3, the element 2 can be prevented from being damaged even if the heavy load is applied to the case 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a flat built-in object that easily breaks when subjected to an impact or load, and an RFID tag composed of a case that covers the built-in object, or an electronic device similar thereto. It is related with the mechanism which improves.

  Currently, there is a wireless communication tag (RFID tag (Radio Frequency-Identification Tag)) that incorporates an IC chip, coil, and magnetic body and operates by an induced magnetic field for use in parts management, logistics management, history management, anti-theft, etc. It is popular. The RFID tag mainly includes a type in which an IC chip, a coil, and a magnetic body are integrally processed with a resin, and a case in which the integrally processed molded is a built-in object and is covered with a glass or resin case. There are types.

Further, the RFID tag is not limited to a system that operates by an induced magnetic field, and there is a system that uses an IC and an antenna circuit or a coil. In this method, there are a monolithic processed product type and a type in which this is built-in and covered with a case.
In any of the methods, the type in which the built-in object is covered with the case can be manufactured by molding the resin, and therefore has an advantage that the manufacturing cost can be suppressed lower than that of the integral processing type.

FIG. 8 shows an example of a conventional RFID tag for a type in which a built-in object is covered with a case. FIG. 8A is a plan view partially including a cross-sectional display showing an outline of the RFID tag, and FIG. 8B is a side view seen from an arrow A in FIG. 8 (c) is a side view seen from the arrow B in FIG. 8 (a).
The built-in object 102 is formed by integrally processing a magnetic body 102a, a coil 102b, and the like, and has a flat plate shape. Since the built-in object 102 is mainly composed of ceramic or the like, it has a characteristic that it is easily damaged when subjected to an impact or load.

  The built-in object 102 is covered with a case 103, and the case 103 also has a flat plate shape. The case 103 that covers the built-in object 102 is made of a resin or glass material, and includes a case main body 103a and a case lid 103b. When assembling the RFID tag 101, the built-in object 102 is housed in a box-shaped case main body 103a having an opening on the upper surface, and a case lid 103b is attached to the opening. The internal organs 102 are sealed to the case 103 by fusion bonding the case main body 103 a and the case lid 103 b by ultrasonic welding.

  This RFID tag is used by being attached to an article using an RFID tag such as a container (hereinafter referred to as an article) by an adhesive tape (double-sided tape) 104 affixed to the wide surface of the flat case 103. .

  The external dimension of the built-in object 102 and the internal dimension of the case 103 are the same dimension, and the gap is not clear when assembled. In addition, a viscous filler is inserted between the built-in object 102 and the case 103 to further reduce the gap between the built-in object 102 and the case 103.

  Further, the above-mentioned filler not only reduces the gap between the built-in object 102 and the case 103, but also has a function of mitigating to some extent that the impact is transmitted to the built-in object 102 when an impact is applied to the case 103. It is considered to have played. Furthermore, an attempt has been proposed in which the built-in material 102 is embedded in a filling resin to reduce the impact. (For example, refer to Patent Document 1.)

Japanese Patent Application No. 11-034563

  As described above, the RFID tag 101 is used by being attached to an article. However, when the RFID tag 101 is attached to the article, the RFID tag 101 may drop on the floor, or the attached RFID tag 101 may come into contact with another member or an adhesive tape. Or the RFID tag 101 may fall off the article and fall.

In this case, a drop impact is applied to the case 103 of the RFID tag 101, and this impact is transmitted to the built-in object 102. Since the built-in object 102 has a characteristic of being easily damaged when an impact is applied, the built-in object 102 may be damaged by the transmitted impact. The built-in object 102 has a flat plate shape. However, the built-in object 102 is particularly vulnerable to impacts in the wide surface direction of the flat plate, and when the drop height is 50 cm or more, the built-in object 102 may be damaged.
Considering the actual use situation, it is considered that the fall height of the RFID tag 101 reaches about 100 cm at the maximum. Therefore, when the normal RFID tag 101 is used, there is a possibility that the built-in object 102 is damaged due to a drop impact and the RFID tag 101 cannot be used.
In addition to dropping, for example, a person may step on the RFID tag 101 and a large load may be applied to the wide surface of the case 103. Also in this case, the built-in object 102 may be damaged.

As a measure for preventing damage to the built-in object 102 when an impact due to dropping or the like as described above is applied, for example, a method of embedding the built-in object 102 in a filling resin as shown in Patent Document 1 can be considered. However, the effect of mitigating the impact is limited, and damage to the built-in object 102 cannot be prevented against a drop impact from a height of about 100 cm.
Further, a method of increasing the gap between the built-in object 102 and the cover 103 and filling a larger amount of filler into the gap is also conceivable. However, unless the volume of the filler is increased so much, damage to the built-in object 102 cannot be prevented against a drop impact from a height of about 100 cm. It is considered that it is very difficult to increase the volume of the filler in consideration of the installation space of the RFID tag.

Although a method of wrapping a buffer material around the RFID tag 101 is also conceivable, considering the installation location of the RFID tag 101, a thick buffer material cannot be wound. It is considered that the damage of the built-in object 102 cannot be prevented against the drop impact.
Further, as another method, it is conceivable that the entire RFID tag is made into an integrally formed structure without using the case 103. In this case, the drop impact resistance is improved, but the manufacturing process becomes complicated. There is a problem that the manufacturing cost becomes higher compared to the case where is used.

  Therefore, the object of the present invention is to solve the above-mentioned problems, improve the impact resistance characteristics, and to prevent the built-in items from being damaged even if dropped from a height that causes damage to the built-in items in the conventional type, It is to provide at a low manufacturing cost. In addition, an object of the present invention is to provide an RFID tag that does not damage internal components even when a large load is applied.

  In order to achieve the above object, a first embodiment of an RFID tag having an impact resistance mechanism according to the present invention includes a built-in object in which a plurality of members including electronic components are integrally formed, and a flat plate shape that covers the periphery of the built-in object. And a projecting portion that absorbs the energy of impact received by the case and prevents damage to the built-in object, and is provided on the wide surface of the case.

  Another embodiment of the RFID tag having an impact resistance mechanism according to the present invention is characterized in that the protruding portion is arranged further outside the outer edge of the built-in object.

  Another embodiment of the RFID tag having an impact resistance mechanism according to the present invention is characterized in that the protruding portion is constituted by a continuous convex portion.

  Another embodiment of the RFID tag having an impact resistance mechanism according to the present invention is characterized in that the protruding portion is composed of two or more independent protrusions.

  Another embodiment of the RFID tag having an impact resistance mechanism of the present invention is characterized in that a screw bracket for attaching the RFID tag to an article is provided, and the screw bracket also constitutes a protruding portion.

  Another embodiment of the RFID tag having an impact resistance mechanism according to the present invention is characterized in that the height of the protruding portion is a value between 0.5 mm and 2.0 mm.

  Another embodiment of the RFID tag having an impact resistance mechanism according to the present invention is characterized in that the case is a resin molded product.

  In another embodiment of the RFID tag having an impact resistance mechanism according to the present invention, a support that connects the upper and lower surfaces facing each other is provided inside the case. It is characterized by preventing.

  Another embodiment of the RFID tag having an impact resistance mechanism according to the present invention includes a case main body and a case lid in which the case is combined in a seal shape, and the joint between the case main body and the case lid is located inside the case. Features.

  Another embodiment of the RFID tag having an impact resistance mechanism according to the present invention is characterized in that the end portion of the stamping portion is arranged on the surface side attached to the article of the case.

In the RFID tag having an impact resistance mechanism according to the present invention, by providing a protrusion on the wide surface of the case, it is possible to greatly improve the impact resistance characteristics, and without affecting the installation location, the conventional type Then, it is possible to prevent damage to the built-in objects even from a drop impact from the height at which the damage occurred.
Various shapes and types of protrusions that absorb impact energy are conceivable, and an optimal one can be selected according to the application.

  Moreover, in the RFID tag having an impact resistance mechanism according to the present invention, the case manufactured by a general resin molding method can be used, and the case members can also be bonded by an ultrasonic bonding machine. be able to.

  In addition, in the RFID tag having the impact-resistant mechanism of the present invention, by providing a support in the case, damage to built-in items can be prevented even when a large weight is applied to the wide surface of the case.

In addition, when the case is composed of a case body and a case lid combined in a seal shape, and the joint between the case body and the case lid is inside the case, it becomes difficult to disassemble the RFID tag, thereby preventing crime and illegality. Can contribute to prevention of improvement.
Furthermore, since the end portion of the stamped portion is arranged on the surface side where the RFID tag is attached to the article, it is difficult to disassemble the RFID tag, which can contribute to crime prevention and illegal improvement prevention.

Embodiments of the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
FIG. 1 shows a first embodiment of an RFID tag according to the present invention. FIG. 1A is a plan view including a cross-sectional display in a part of the outline of the RFID tag according to the first embodiment, and FIG. 1B is a side view seen from an arrow D in FIG. It is.
The RFID tag 1 includes a built-in object 2 and a resin cover 3 that covers the built-in object 2.
The built-in object 2 is configured by integrally molding a magnetic body 2a, a coil 2b, and the like, and has a flat plate shape. The built-in object 2 is mainly composed of a brittle member such as ceramic, and has a characteristic that it is easily damaged when subjected to an impact or a load.

  The built-in object 2 is covered with a case 3 and the case 3 also has a flat plate shape. The case 3 that covers the built-in object 2 is made of resin, and includes a case main body 3a and a case lid 3b. When assembling this RFID tag, the built-in object 2 is housed in a box-shaped case body 3a having an upper opening, and a case lid 3b is attached to the opening. And the internal organs 2 can be sealed by fusion-bonding the case main body 3a and the case lid 103b by ultrasonic welding. Moreover, since ultrasonic welding is used, the case main body 3a and the case lid 3b can be joined without overheating the built-in object 2.

The external dimension of the built-in object 2 and the internal dimension of the case 3 are the same dimension so that the gap is not clear when assembled. In addition, a viscous filler is inserted between the built-in object 2 and the case 3 to further reduce the gap between the built-in object 2 and the case 3.
The above filler not only reduces the gap between the built-in object 2 and the case 3, but also has a function of mitigating the transmission of the shock to the built-in object 2 when an impact is applied to the case 3. It is thought that there is.

The RFID tag 1 is used by being attached to an article using an RFID tag such as a container (hereinafter referred to as an article) by an adhesive tape (double-sided tape) 4 attached to the wide surface of the flat case 3. .
Here, of the two wide surfaces of the cover 3, the surface to which the adhesive tape 4 is attached is referred to as the lower surface, and the opposite surface is referred to as the upper surface.

  When the RFID tag 1 falls with the wide surface facing down, the built-in object 2 is susceptible to damage because it is vulnerable to impacts in the wide surface direction, but in this Embodiment 1, the impact energy when dropped is absorbed. A convex portion 5 is provided on the upper surface of the cover 3 as a protruding portion. In a normal method of use, there is a high possibility of dropping with the upper surface opposite to the surface attached to the article facing down, and in this embodiment, the convex portion 5 that absorbs the drop impact energy is provided on the upper surface. .

The convex portion 5 is usually provided on the outer side of the outer edge of the built-in object 3. In the first embodiment, as shown in FIG. 1A, it is continuously provided on the entire outer periphery of the upper surface.
It is possible to greatly absorb the impact energy at the time of dropping by this convex part 5 and, furthermore, since the position of the convex part 5 is outside the outer edge of the built-in object 3, it is difficult to transmit the impact of the fall. Yes.

  When the conventional RFID tag was dropped from a height of 50 cm or more, the built-in material was damaged. However, although the height of the convex portion 5 in the embodiment shown in FIG. 1 is about 1 mm, there is no damage to the built-in object 2 even when it is dropped from a height of around 100 cm with the top face down. Met.

  Here, a drop test was conducted on the RFID tags having different heights of the protrusions 5 to check the damage status of the built-in objects at various drop heights. The result is shown in the graph of FIG. In this graph, the horizontal axis represents the height (unit: mm) of the convex portion 5, and the vertical axis represents the drop height (unit: cm). The diagram shown in this graph shows the maximum drop height at which the built-in object 3 is not damaged at the height of each convex portion. For example, when the height of the convex portion is about 0.8 mm, the maximum drop height is about 100 cm. In a normal use state of the RFID tag, the maximum drop height is considered to be around 100 cm, so that the height of the convex portion is considered to be appropriate around 0.8 mm to 1 mm. In this case, since the amount by which the thickness of the case 3 increases is small, it is considered practically that no problem arises in the installation of the RFID tag.

However, if the height of the convex portion is further increased, it is possible to absorb even greater impact energy, and it is also possible to take dimensions other than 0.8 mm to 1 mm depending on the drop height and installation conditions. . Considering various usage situations of actual RFID tags, considering the possible drop height and the required dimensional constraints, it is considered that the height of the convex portion is about 0.5 mm to 2 mm.
Further, in the embodiment shown in FIG. 1, the convex portion 5 is provided only on the upper surface, but it is also possible to provide the convex portion on the lower surface. 3 damage can be prevented.

(Embodiment 2)
Next, FIG. 3 shows Embodiment 2 of the RFID tag of the present invention. FIG. 3A is a plan view partially including a cross-sectional display showing an outline of the RFID tag according to the second embodiment, and FIG. 3B is a side view seen from an arrow E in FIG. is there.
In the second embodiment, four hemispherical protrusions 6 are provided as the protruding portions instead of the continuous convex portions as in the first embodiment. The protrusion 6 is provided on the outer side of the outer edge of the built-in object 3 on the upper surface. Other aspects are the same as in the first embodiment.

  The height of the protrusion shown in FIG. 3 is about 1 mm, but even if the RFID tag is dropped from the height of about 100 cm with the top surface down, the built-in object 2 is not damaged at all. The relationship between the height of the protrusion 6 and the maximum drop height at which the built-in object 3 is not damaged is substantially the same as the value shown in the graph of FIG. In a normal use state, the assumed maximum drop height is around 100 cm, so that it is considered that the height of the protrusion is preferably about 0.8 mm to 1 mm.

However, the height of the protrusion can naturally take dimensions other than about 0.8 mm to 1 mm depending on the assumed drop distance and mounting position. It is considered that about 5 mm to 2.0 mm is appropriate. Moreover, this protrusion can be provided not only on the upper surface but also on the lower surface.
Further, although the number of the protrusions 6 shown in FIG. 3 is four, for example, even when the number is two, even if the protrusion 6 is dropped from a height of about 100 cm, the built-in object 2 is not damaged. .

(Embodiment 3)
Next, FIG. 4 shows a third embodiment of the RFID tag according to the present invention. FIG. 4A is a plan view showing an outline of the RFID tag according to the third embodiment, and FIG. 4B is a side view seen from an arrow F in FIG. 4A, and FIG. These are the side views seen from the arrow G of Fig.4 (a).
In the above-described embodiment, the adhesive tape 4 is used to attach the RFID tag to the article. However, in the third embodiment, in addition to the adhesive tape 4, four screwing brackets 8 are provided outside the case 3. It is provided and can be attached to the article by screws. As shown in FIG. 4C, the thickness of the bracket 8 is about 1 mm thicker than the thickness of the case 3 (projects 1 mm from the upper surface), and forms a protruding portion that absorbs the drop impact energy. .

Similar to the above-described embodiment, even when the RFID tag was dropped from a height of around 100 cm with the top surface down, the built-in object 2 was not damaged at all. The relationship between the height of the protrusion and the maximum drop height at which the built-in object 2 is not damaged is substantially the same as the value shown in the graph of FIG.
If the RFID tag is in a normal use state, the assumed maximum drop height is about 100 cm. Therefore, it is considered that the height of the protrusion is preferably about 0.8 mm to 1 mm.
However, the height of the protrusion can naturally take dimensions other than about 0.8 mm to 1 mm depending on the assumed drop distance and mounting position. It is considered that about 5 mm to 2.0 mm is appropriate. Further, the protruding portion can be provided not only on the upper surface but also on the lower surface.

As described above, by providing the screw-fastening bracket 8, the attachment method of the RFID tag 1 to the article can use screws or the like in addition to the case where the adhesive tape 4 is used. In this case, if a metal screw is used to attach the RFID tag, the magnetic flux generated by the magnetic body 2a is affected by the metal, and the frequency characteristics of the RFID tag 1 will fluctuate.
Therefore, as shown in FIG. 4A, the position of the screw-fastening bracket 8 is arranged further outside the outer edge of the built-in object 2. With this arrangement, frequency fluctuations caused by metal can be minimized.

(Embodiment 4)
As an embodiment of the RFID tag 1 provided with the screwing bracket 8, in addition to the third embodiment, various other embodiments can be considered as shown in FIG. These embodiments are collectively referred to as Embodiment 4.
The embodiment shown in FIG. 5A is a form in which the number of the brackets 8 for screwing is two. In the third embodiment, the screw-fixing bracket 8 protrudes to the outside of the case 3. However, in the embodiment shown in FIG. 5B, the strength is increased as an integrated structure in which these brackets are connected.
Further, the embodiment shown in FIG. 5C has a shape in which the strength of each screwing bracket 8 is increased as compared with the third embodiment. As described above, various embodiments can be adopted depending on the use situation. In any case, the screwing bracket 8 is arranged so that the frequency fluctuation due to the metal can be suppressed to the minimum.

(Embodiment 5)
Next, FIG. 6 shows a fifth embodiment of the RFID tag according to the present invention. This embodiment relates to the structure of the case 3. FIG. 6A is a side sectional view showing the structure of the conventional case 3, and FIG. 6B is a side sectional view showing the structure of the case 3 according to the present invention.

The structure of the conventional case 3 is a structure in which a flat case lid 3b is attached to a box-shaped case main body 3a having an open upper surface so as to cover the opening of the upper surface. Usually, the case lid 3b side is the upper surface, and the case body 3a side is the lower surface.
The case body 3a and the case lid 3b are joined by ultrasonic welding as shown in FIG. Since the adhesive tape 4 is attached to the lower surface of the case 3 and the RFID tag 1 is attached to the article, the joint between the case main body 3a and the case lid 3b on the upper surface side comes to a position where a person can easily touch it.

  Therefore, for example, when an anti-theft RFID tag is attached to a product, a person can easily touch the joint, so that the RFID tag can be disassembled by inserting a driver or the like into the joint. Is possible and fraudulent activity may occur.

  On the other hand, in the structure of the case 3 according to the present invention, as shown in FIG. 6 (b), the case body 3a and the case lid 3b, both of which have a box shape with an opening, are assembled so as to overlap each other in the form of a stamp. It has been. And by using an ultrasonic welding machine, the inner surface of the case lid 3b and the case main body 3a can be joined from the outside of the case lid 3b, so the joint is inside the case 3. Therefore, it is not possible to remove the joint by inserting a driver or the like from the outside.

  In addition, since the end portion (indicated by arrow J) of the seal stamp portion where the case lid 3b and the case main body 3a into which a driver or the like can be inserted is combined is on the lower surface side which is an attachment surface with the article, RFID After the tag is attached to the article, this end is not accessible and the RFID tag cannot be disassembled.

In addition, if the structure of the fifth embodiment is combined with the RFID tag having the screwing bracket as in the third and fourth embodiments, the RFID tag can be disassembled after the RFID tag is attached to the article with the screw. become unable.
As described above, according to the structure of the fifth embodiment, the RFID tag cannot be disassembled, and crime prevention and illegal modification prevention can be realized.

(Embodiment 6)
Next, FIG. 7 shows Embodiment 6 of the RFID tag of the present invention. FIG. 7A is a plan view including a cross-sectional display in a part of the RFID tag 1 according to the sixth embodiment, and FIG. 7 (c) is a side view as seen from the arrow I in FIG. 7 (a).
In the sixth embodiment, two support columns 7 that connect the upper surface and the lower surface are provided inside the case 3. Even if the wide surface of the RFID tag 1 is stepped on or a large load is applied to the wide surface, it is supported by the strength of the support column 7 and can prevent the built-in object 2 from being damaged.

  This support | pillar 7 is provided in the case main body 3 side, as FIG.7 (b) shows. Further, the built-in object 2 is also provided with a through hole through which the column 7 is passed at a position where the column 7 is located. This support | pillar 7 has a little influence on the performance of the magnetic body 2a, and is arrange | positioned in the place where the intensity | strength of a wide surface is acquired. As in the other embodiments, the case body 3a and the case lid 3b are joined by ultrasonic welding.

  This Embodiment 6 can be combined with any of the above-described embodiments. In this case, if the RFID tag having the protruding portion that absorbs the drop impact energy of the above-described embodiment and having the support column 7 inside the case 3 is used on the wide surface of the case 3, damage to the built-in object 2 due to dropping is prevented. In addition, even when a load is applied to the wide surface, damage to the built-in object 2 can be prevented.

(Other embodiments)
In the above-described embodiment, a resinous case is used, but a glass material or other various materials can be used depending on the application.
The shape of the built-in object is illustrated as a flat plate, but other shapes such as a rectangular parallelepiped shape or a cylindrical shape are also applicable.
In the above-described embodiment, the RFID tag has been described. However, the present invention is not limited to the application to the RFID tag, and a built-in object that is easily damaged when subjected to an impact, such as an electronic device similar thereto, can be used. It can be applied to any product or member having a covered structure.
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various embodiments can be considered.

It is the top view and side view which show the outline | summary of Embodiment 1 of the RFID tag which has an impact-resistant mechanism of this invention. It is the graph which showed the relationship between the height of the projection part which concerns on this invention, and the maximum fall height which a built-in thing does not damage. It is the top view and side view which show the outline | summary of Embodiment 2 of the RFID tag which has an impact-resistant mechanism of this invention. It is the top view and side view which show the outline | summary of Embodiment 3 of the RFID tag which has an impact-resistant mechanism of this invention. It is the top view and side view which show the outline | summary of Embodiment 4 of the RFID tag which has an impact-resistant mechanism of this invention. It is sectional drawing which shows the outline | summary of Embodiment 5 of the RFID tag which has an impact-resistant mechanism of this invention. It is the top view and side view which show the outline | summary of Embodiment 6 of the RFID tag which has an impact-resistant mechanism of this invention. It is the top view and side view which show the outline | summary of the Example of the conventional RFID tag.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 RFID tag 2 Built-in thing 2a Magnetic body 2b Coil 3 Case 3a Case main body 3b Case lid 4 Adhesive tape 5 Convex part 6 Protrusion 7 Post | push 8 Screwing bracket 101 RFID tag 102 Built-in thing 102a Magnetic body 102b Coil 103 Case 103a Case main body 103b Case lid 104 Adhesive tape

Claims (10)

A built-in object in which a plurality of members including electronic parts are integrally formed, and a case having a flat outer shape covering the periphery of the built-in object,
An RFID tag having an impact-resistant mechanism, wherein a protruding portion that absorbs energy of impact received by the case and prevents damage to the built-in object is provided on a wide surface of the case. 2. The RFID tag having an impact resistance mechanism according to claim 1, wherein the protruding portion is disposed further outside than an outer edge of the built-in object. The RFID tag having an impact-resistant mechanism according to claim 1, wherein the protruding portion is constituted by a continuous convex portion. The RFID tag having an impact-resistant mechanism according to claim 1 or 2, wherein the protruding portion includes two or more independent protrusions. The RFID tag having an impact-resistant mechanism according to claim 1 or 2, further comprising a screw bracket for attaching the RFID tag to an article, wherein the screw bracket also constitutes the protruding portion. The RFID tag having an impact-resistant mechanism according to any one of claims 1 to 5, wherein a height of the protruding portion is a value between 0.5 mm and 2.0 mm. The RFID tag having an impact resistance mechanism according to any one of claims 1 to 6, wherein the case is a resin molded product. The support column that connects the upper and lower wide surfaces facing each other is provided inside the case, and the support column supports the load received by the case to prevent damage to the built-in object. 8. An RFID tag having the impact-resistant mechanism according to any one of 7 above. 9. The method according to claim 1, wherein the case is composed of a case main body and a case lid combined in a seal shape, and a joint portion between the case main body and the case lid is inside the case. An RFID tag having the impact-resistant mechanism according to Item. The RFID tag having an impact-resistant mechanism according to claim 9, wherein an end portion of the stamping portion is disposed on a surface side of the case attached to the article.