JP2008234635A - Rfid tag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an RFID tag strong against folding and pulling. <P>SOLUTION: In the RFID tag 1, a storage chamber 31 of an IC chip and an attachment part 32 to an object for attachment are integrally molded by soft resin. The RFID tag is characterized that the IC chip 2 is enclosed in the storage chamber 31 at a freely movable state and there is minute irregularity on the internal surface of the storage chamber 31 of the IC chip. The storage chamber 31 is, for example, in the cylindrical shape. The storage chamber 31 may be integrated with sealing tools. Within a range for covering a chip main body and a lead wire part of the IC chip 2, a reinforcement member may be attached to the storage chamber. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an RFID tag.

  The RFID tag is a tag in which a minute wireless IC chip used for identifying an object is incorporated. The wireless IC chip stores information such as its own identification code, and has the ability to send and receive information to and from the management system using radio waves. Therefore, research has been conducted as a product identification and management technology that replaces barcodes in the industry. It is being advanced. Recently, it has been attracting attention as a fundamental technology for promoting the IT and automation of society.

  The RFID tag has various shapes such as a label type, a card type, a coin type, and a stick type, and can be selected according to the application. The communication distance ranges from several millimeters to several meters, and these are also properly used depending on the application.

  It is difficult to directly attach a wireless IC chip to a managed item such as a product, and it is usually necessary to accommodate it in some enclosure.

For example, in the following Patent Document 1, a record carrier unit is configured in a state where a record carrier such as an IC chip is sandwiched and sealed between a first resin layer and a second resin layer. And this record carrier unit is arrange | positioned with respect to the single side | surface of the base material on which various information was displayed from the 1st resin layer side.
JP 2005-331917 A

  In the above prior art, a record carrier such as an IC chip is sufficiently protected from water and external pressure, but is not necessarily strong against bending. This is because the record carrier is sandwiched and sealed between the resin layers, so that the IC chip is forcibly bent and the wiring portion may be broken by bending. Also, even if the IC chip is sealed in a soft resin container such as silicon resin, the IC chip expands and contracts in the same way due to the adhesiveness of the resin when the resin is pulled, and the antenna section is disconnected or restored while it is contracted. If not, it may still be damaged.

  The present invention has been made in view of this problem, and an object thereof is to provide an RFID tag that is resistant to bending and pulling.

  The RFID tag of the present invention is such that the IC chip housing chamber and the mounting portion to the mounting object are integrally formed of a soft resin, and the IC chip is enclosed in the housing chamber in a movable state. And, there is a fine unevenness on the inner surface of the accommodation chamber of the IC chip.

  In the RFID tag of the present invention, the IC chip is encapsulated in a movable state in the accommodation chamber, and the inner surface of the accommodation chamber of the IC chip has a rough surface and is rough. Even if it is bent, the IC chip only moves freely in the accommodation chamber and is not destroyed.

  As described above, the RFID tag has various shapes such as a label type, a card type, a coin type, and a stick type. Correspondingly, the shape of the IC chip storage chamber is also different. For example, the accommodation chamber in the stick-type RFID tag is preferably cylindrical. The accommodation chamber in the label-type or card-type RFID tag preferably has a thin rectangular parallelepiped shape. The storage chamber in the coin-type RFID tag preferably has a low cylindrical shape.

  A fine unevenness is provided on the inner surface of the IC chip storage chamber to make it rough. This is because the IC chip and the accommodation chamber can be prevented from adhering. In this specification, “fine unevenness” means, for example, that a mold is provided with fine unevenness by a sand shot, and a rough surface that can be felt by a human finger is formed on the surface. Mean, not smooth.

  The attachment part to an attachment target object should just be an extension part of the said storage chamber, and it is preferable that it is a plane part. In order to attach to an attachment object, it can sew with a thread | yarn using this plane part. Alternatively, it is possible to make a hole in the flat portion and fix it through a sealing tool or the like.

  As the soft resin forming the IC chip storage chamber and the attachment portion to the attachment object, a silicon resin or a urethane resin rich in flexibility and flexibility is preferable. The thickness is preferably about 0.5 to 2 mm.

  Preferably, a reinforcing material is attached to the accommodation chamber within a range covering the chip body and the lead wire portion of the IC chip. By doing so, it is possible to protect the portion of the lead wire that is easily damaged by bending or the like.

  The reinforcing material may be, for example, a C-shaped cross section, and a free hell portion may be engaged with each other to form a hell fit. This reinforcing material is attached to the outside of the storage chamber.

  In order to attach this reinforcing material and fix the position, it is preferable to provide a slit in the attachment portion.

  As another configuration of the reinforcing material, it can be attached to the inside of the storage chamber. In that case, it is necessary to provide a means for permitting the reinforcement material to enter the inside of the accommodation chamber but preventing the reinforcement from falling off.

Examples of means for allowing the reinforcing material to enter the inside of the housing chamber but preventing it from falling off are as follows.
(1) A tapered portion provided at the end of the housing chamber and an end stepped portion of the tapered portion.
(2) The first groove on the inlet side, the second groove on the outlet side, and the third groove on the center provided inside the storage chamber, and the diameter of the three grooves is the third groove 40> the first groove. 38 ≧ second groove 39.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 is a front view of an RFID tag 1 according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line 2-2 of FIG.

  As can be seen from these drawings, a long and narrow strip-like wireless IC chip 2 is housed in a stick-type RFID tag enclosure 3. The IC chip 2 includes a chip body 21, a lead wire 22 extending therefrom, and an antenna 23 that occupies the main part of the tag enclosure 3. The portion of the lead wire 22 is easily damaged by bending or the like.

  As shown in FIGS. 1 and 2, the RFID tag enclosure 3 has a cylindrical portion 31 on the right half and a flat portion 32 on the left half, and both are integrated. The wireless IC chip is sealed in the cylindrical portion 31 in a free state. The wireless IC chip 2 can move freely in the longitudinal direction and the rotational direction in the cylindrical portion 31, but cannot move greatly because it is in the relatively narrow cylindrical portion 31.

  The RFID tag enclosure 3 is made of silicon resin, has a thickness of about 1 mm, and has an impact absorption capability and a flexibility for bending.

  The inner surface of the cylindrical portion 31 has a rough surface composed of small irregularities. By doing in this way, it can avoid that the radio | wireless IC chip 2 and the inner surface of the cylindrical part 31 adhere due to the adhesiveness of silicon. In order to make the inner surface of the cylindrical portion 31 rough, it is only necessary to provide the molding die with irregularities by sand shot in advance.

  The RFID tag 1 is manufactured by inserting the wireless IC chip 2 into the cylindrical portion 31 with one end opened and then covering the open end portion.

  FIG. 3 is a perspective view showing a state in which the RFID tag 1 is attached to the attachment object 4. It is attached by sewing the flat portion 32 of the RFID tag with the thread 5 to the attachment object 4, for example, clothes.

  FIG. 4 is a front view of a state in which the RFID tag 1 </ b> A according to the second embodiment is attached to the sealing tool 6.

  The difference from the first embodiment is that the flat portion 32A of the RFID tag 1A is relatively wide, and one mounting hole 33 is opened near both ends of the flat portion 32A. The sealing tool 6 is attached using this hole. FIG. 5 shows a state in which a ring is formed by the sealing tool 6. Even if the RFID tag 1A is bent in this manner, the IC chip 2A is free to move within the cylindrical portion 31A and is not destroyed.

    6 to 8 are RFID tags according to a third embodiment of the present invention, FIG. 6 is a perspective view, FIG. 7 is a side view of a cover used in the third embodiment, and FIG. 8 is a reference diagram showing a use state. .

  The third embodiment differs from the first and second embodiments in that a reinforcing material 7 made of a transparent cover is attached to protect the lead wire portion. As described above, the lead wire portion is particularly easily damaged. In order to prevent breakage of this portion, the transparent cover 7 is attached to the cylindrical portion 31B from the outside. A slit 34 for passing through the transparent cover 7 is provided in the flat portion 32B in order to attach the transparent cover 7 and fix the position thereof to prevent dropping.

  The transparent cover 7 is made of synthetic resin and has a C-shaped cross section as shown in FIG. The free tips 71 and 72 are provided with engaging portions that engage with each other. When the transparent cover 7 is attached through the slit 34 and the engaging portions are pressed with fingers, a so-called hell fit is obtained and a cylinder is completed. The length of the transparent cover 7 is essential to have a length that covers the lead wire portion 22 (see FIG. 1), and is usually about 1 to 3 cm. The cover is not necessarily transparent, but is preferably transparent or translucent for IC chip confirmation.

  In the completed state, the transparent cover 7 reinforces the cylindrical portion corresponding to the lead wire portion 22 (see FIG. 1) and is difficult to bend, and as shown in FIG. 8, the lead wire portion 22 is not damaged even when bent. .

  Since the other points are the same as those of the first embodiment, “B” is added to the reference numerals of the first embodiment and the description thereof is omitted.

    9 and 10 show an RFID tag according to Embodiment 4 of the present invention, FIG. 9 is a perspective view, and FIG. 10 is an example of a cylindrical portion used in Embodiment 4, and two types of cross-sectional views.

  Example 4 differs from Example 3 in that the reinforcing members 7C and 7D of the lead wire portion are attached to the inside of the cylindrical part 32C.

  Since the transparent covers 7C and 7D of this embodiment are accommodated inside the cylindrical portion 32C, it is a matter of course that the diameter must be shorter than that of the third embodiment. The structure of the transparent cover 7C may be the same as that of the third embodiment (see FIG. 7). However, in this fourth embodiment, since there is no work to be applied from the outside, it may be a cylindrical body from the beginning instead of the C-shaped section. A method of accommodating the transparent covers 7C and 7D inside the cylindrical portion 32C is shown in FIG.

  In FIG. 10A, there is a first groove 35 whose diameter increases toward the back in the front half of the cylindrical portion 32C, and a thin and parallel second groove 36 in the rear half, and a stepped portion therebetween. 37 is formed. The transparent cover 7 </ b> C is press-fitted from the entrance of the front half and pushed into the stepped portion 37. Since the transparent cover 7C has a taper at the front half, the transparent cover 7C can move forward, but cannot slide backward. The transparent cover 7C is pushed down to the stepped portion 37 and stays at that position.

  In FIG. 10B, a parallel third groove 40 is formed between the first half parallel first groove 38 and the second half parallel second groove 39. The first groove 38 has a diameter that allows the transparent cover 7D to be press-fitted, the second groove 39 has a diameter that prevents further movement of the transparent cover 7D, and the third groove 40 is transparent. The cover 7D has a diameter that allows it to move freely. Therefore, the diameters of the three grooves are in the relationship of the third groove 40> the first groove 38 ≧ the second groove 39.

  The transparent cover 7 </ b> D is press-fitted from the front half inlet and pushed into the third groove 40. Since the transparent cover has a level difference before and after the third groove 40, the transparent cover cannot move forward.

  Since the other points are the same as those of the first embodiment, “C” or “D” is added to the reference numerals of the first embodiment, and the description thereof is omitted.

It is a front view of the RFID tag which concerns on one Example of this invention. FIG. 2 is a sectional view taken along line 2-2 of FIG. It is a perspective view which shows the state which attached the RFID tag to the attachment target object. It is a front view of the state which attached the RFID tag which concerns on 2nd Example to the sealing tool. In 2nd Example, it is a perspective view which shows the state which formed the ring with the sealing tool. It is a perspective view of the RFID tag which concerns on Example 3 of this invention. It is a side view of the cover used in the RFID tag which concerns on Example 3 of this invention, (a) is before joining, (b) is after joining. It is a reference figure which shows the use condition of the RFID tag which concerns on Example 3 of this invention. It is a perspective view of the RFID tag which concerns on Example 4 of this invention. (A) and (b) are two types of sectional drawings of the example of the cylindrical part used with the RFID tag which concerns on Example 4 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tag 1A Tag 2 IC chip 2A IC chip 3 Tag enclosure 31 Cylindrical part 31A Cylindrical part 32 Flat part 32A Flat part 4 Attachment object 5 Thread 6 Sealing tool 7 Reinforcing material (transparent cover)
7C Reinforcing material (transparent cover)
7D reinforcement (transparent cover)

Claims (10)

The IC chip storage chamber (31, 31A, 31B) and the attachment portion (32, 32A, 32B) to the attachment object (4) are integrally formed of a soft resin,
The IC chip (2, 2A) is enclosed in the accommodation chamber (31, 31A, 31B) in a movable state; and
An RFID tag (1, 1A, 1B) characterized in that there are fine irregularities on the inner surface of the IC chip storage chamber (31, 31A, 31B).   The RFID tag according to claim 1, wherein the IC chip (2, 2A) has an elongated strip shape, and the storage chamber (31, 31A, 31B) has a cylindrical portion.   The RFID tag according to claim 1 or 2, wherein the attachment portion (32, 32A, 32B) to the attachment object (4) is an extended flat portion of the storage chamber (31, 31A, 31B).   The RFID tag according to any one of claims 1 to 3, wherein the RFID tag is integrated with a sealing tool (6).   The reinforcing material (7, 7C, 7D) is attached to the accommodation chamber (31B) within a range covering the chip body (21) and the lead wire portion (22) of the IC chip (2). The RFID tag according to any one of the above.   The reinforcing member (7) has a C-shaped cross section, and the free tip portions (71, 72) are engaged with each other to form a hell fit, and is attached to the outside of the storage chamber (32B). The RFID tag according to claim 5.   The RFID tag according to any one of claims 3, 5, and 6, wherein a slit (34) is provided in the attachment portion (32B) in order to attach the reinforcing member (7) and fix the position.   The reinforcing material (7C, 7D) is attached to the inside of the storage chamber (32C, 32D), and the reinforcement material (7C, 7D) is allowed to enter inside the storage chamber, but is prevented from falling off. The RFID tag according to claim 5, further comprising means for performing the operation.   A means for allowing the reinforcement (7C) to enter the inside of the storage chamber but allowing the reinforcement member (7C) to enter, but preventing the dropout is provided in a tapered portion (35) which is provided on the inner side of the storage chamber (32C). 9. The RFID tag according to claim 8, wherein the RFID tag is an end point step portion (37) of the taper portion.   A first groove (38) on the inlet side provided on the inner side of the storage chamber (32D) is provided inside the storage chamber, the means for allowing the reinforcement (7D) to enter but preventing the dropout. The second groove (39) on the outlet side and the third groove (40) in the center, and the diameters of the three grooves are in a relationship of third groove 40> first groove 38 ≧ second groove 39. RFID tag.