JP2008087513A - Structure for installing transponder on tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure for installing a transponder on a tire which is capable of driving the transponder from all directions, free from any effect on expansion or the like in the radial direction generated in a manufacturing process of a tire, and capable of sufficiently withstanding repetitive deformation of the tire generated during the use, and easily performing a change or repair. <P>SOLUTION: The structure comprises a plurality of holding members 6 formed of a non-conductive material provided on an inner wall surface 2 of a tire 1, and a transponder 5 comprising at least one set of loop antenna 11 print-wired on a ring-shaped flexible circuit substrate 10, and a tire information detection unit 12 connected to the loop antenna 11 on the flexible circuit substrate 10, and the transponder 5 is attachably/detachably fitted to the holding members 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a transponder installation structure on a tire in which a transponder having a loop antenna and a tire information detection unit is installed in a tire of an automobile or the like.

  A conventional RFID tag installation structure for an RFID tag is provided with a loop antenna along the circumferential direction of the tire, a detection coil constituting a series circuit, and an RFID tag electromagnetically coupled to the detection coil Is provided in the tire, and an internal state detection unit for detecting air pressure, internal temperature, and the like is installed inside the tire, and this is connected to an RFID tag (for example, see Patent Document 1).

JP 2002-264617 A (page 3 to page 6, FIGS. 1 and 2)

  In the installation structure of the RFID tag in the tire of Patent Document 1, since the transponder is embedded in the tire, it is necessary to incorporate the transponder in the tire manufacturing process. However, bias tires are inflated in the tire diametrical direction when inserted into a curing process having an air bag generally forcing the uncured tire into the diameter of the ring surrounding the uncured tire. . Also, radial tires are inflated in the tire diameter direction during the tire assembly or molding process, and further in the tire diameter direction during the curing process.

  For this reason, the loop antenna embedded in the tire and any electronic circuit connected to the loop antenna must have an electrical connection that can withstand the diametric expansion of the tire that occurs during the tire manufacturing process. In addition, the loop antenna has a problem that it must be able to withstand repetitive deformation that occurs when the tire is used.

Also, in Patent Document 1, even when the transponder is fixed along the inner peripheral surface of the tire, the loop antenna is embedded in the tire, so that the same problem as described above occurs.
As described above, the RFID tag installation structure in the tire described in Patent Document 1 is a structure in which the transponder is embedded in the tire or a part thereof is fixed along the inner peripheral surface of the tire. In addition to the above problems, transponder replacement and repair were extremely difficult.

  The present invention has been made to solve the above-described problems, and can drive a transponder from all directions and is not affected by radial expansion or the like generated in the tire manufacturing process. The object of the present invention is to provide a structure for installing a transponder on a tire that can sufficiently withstand repetitive deformations that occur during use, and that is extremely easy to replace and repair.

  A transponder installation structure for a tire according to the present invention includes a plurality of holding members made of a non-conductive material provided on an inner wall surface of a tire, and at least one loop of printed wiring on a ring-shaped flexible circuit board. A transponder including a tire information detection unit connected to the loop antenna on the antenna and the flexible circuit board, and the transponder is detachably attached to the holding member.

  In addition, the holding member is provided with a slit that reaches the vicinity of both end portions at a substantially central portion in the thickness direction of the slightly elongated non-conductive material, with one side of the slit as a base and the other side substantially in the longitudinal direction. A sandwich piece is formed by cutting from the center, and the flexible circuit board of the transponder is sandwiched between the base and the sandwich piece.

Further, the plurality of holding members are provided radially and at equal intervals on the same circumference provided concentrically with the tire on the inner wall surface of the tire.
The holding member was attached to the inner wall surface of the tire by an adhesive.

  According to the installation structure of the transponder to the tire of the present invention, the transponder can be driven from all directions, and is not affected by the radial expansion or the like generated in the tire manufacturing process. Can withstand repetitive deformations that occur in addition to being extremely easy to replace and repair.

FIG. 1 is a longitudinal sectional view of a tire for explaining a structure for installing a transponder in a tire according to an embodiment of the present invention (cross section AA in FIG. 2), and FIG. It is the shown perspective view.
In both figures, 1 is a tire, 2 is an inner wall surface of the tire 1, 3 is a wheel, 5 is a transponder provided on one inner wall surface 2 of the tire 1, and 6 is provided on one inner wall surface of the tire 1. 5 is a plurality of holding members.

  The holding member 6 is made of a non-conductive material having elasticity such as rubber. As shown in FIG. 3, the holding member 6 has a rectangular cross section and is a slit that reaches the vicinity of both ends in the longitudinal direction at a substantially central portion in the thickness direction of a slightly elongated material. 7, the lower part of the slit 7 is used as a base 8, and the upper part is cut at a substantially central part in the longitudinal direction to form a pair of sandwiching pieces 9a, 9b. In the above description, a case where a material having a rectangular cross section is used for the holding member 6 is shown. However, the present invention is not limited to this. For example, the cross sectional shape may be another cross sectional shape such as a semi-cylindrical shape. Good.

  The holding member 6 configured in this way has the base 8 on the inner wall surface 2 side of the tire 1 and is radially and equally spaced (for example, on the same circumference provided concentrically with the center portion of the tire 1). , At positions of 0 °, 45 °, 90 °, 135 °, 180 °, 225 °, 270 °, 315 °) with respect to the center of the tire 1, for example, in the manufacturing process of the tire 1 It is provided on the inner wall surface, or is attached to the inner wall surface with an adhesive after the tire 1 is manufactured. Although the number of the holding members 6 is not particularly limited, it is desirable to provide at least six or more.

Reference numeral 10 denotes a ring-shaped flexible circuit board, on the surface of which at least one loop antenna 11 made of a conductive material is provided by printed wiring, and a tire information detection unit 12 is connected to the loop antenna 11. Thus, the transponder 5 is configured.
The flexible circuit board 10 constituting the transponder 5 is placed on the base 8 by pushing the holding pieces 9a and 9b of the plurality of holding members 6 provided on the inner wall surface 2 of the tire 1 obliquely upward. Then, the clamping pieces 9a and 9b are returned to the original state, and the flexible circuit board 10 is clamped by the base 8 and the clamping pieces 9a and 9b, and held by the holding member 6 along the inner wall surface 2 of the tire 1.

Next, the operation of the present invention configured as described above will be described.
The technology of the RFID transponder used in the present invention is well known, and an electromagnetic field for driving the transponder 5 is generated from an on-board reader. When the magnetic flux passes through the region of the loop antenna 11, a current is generated in the loop antenna 11 by electromagnetic induction, and further, electric power for driving the tire information detection unit 12 is obtained.

  Thereby, the transponder 5 can be driven from all directions of the tire 1, and the position change of the transponder 5 can be dealt with by the rotation of the tire 1. The tire information detection unit 12 can obtain tire-specific identification information, information on the temperature and pressure of the tire 1 by adding a sensor as necessary, and the information obtained thereby can be obtained wirelessly. The tire information can be transmitted to a driver or the like by a vehicle-mounted reader.

  According to the present invention, the transponder 5 can be driven from all directions, and the electronic circuit such as the loop antenna 11 of the transponder 5 incorporated in the tire 1 and the tire information detection unit 12 connected thereto is provided in the tire. Therefore, it is not affected by radial expansion or the like that occurs during the manufacturing process of the tire 1. Furthermore, since the loop antenna 11 is provided on the flexible circuit board 10 by printed wiring, it can sufficiently withstand repeated deformation of the tire 1 that occurs during use of the tire 1.

  In addition, since the transponder 5 is detachably held by the holding member 6 provided on the inner wall surface of the tire 1, in the case of replacement or repair, it is only necessary to remove and install the holding member 6. Very easy.

It is a longitudinal cross-sectional view (AA sectional drawing of FIG. 2) of the tire for demonstrating the installation structure of the transponder to the tire which concerns on one embodiment of this invention. It is the perspective view which showed the principal part of FIG. 1 in the cross section. It is a perspective view of the holding member of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 tire, 2 tire inner wall surface, 5 transponder, 6 holding member, 7 slit, 8 base, 9a, 9b clamping piece, 10 flexible circuit board, 11 loop antenna, 12 tire information detection part.

Claims (4)

A plurality of holding members made of a non-conductive material provided on an inner wall surface of a tire, at least one loop antenna printed on a ring-shaped flexible circuit board, and connected to the loop antenna on the flexible circuit board A transponder consisting of a tire information detection unit,
A transponder installation structure on a tire, wherein the transponder is detachably attached to the holding member.   The holding member is provided with a slit that reaches the vicinity of both ends at a substantially central portion in the thickness direction of a slightly elongated non-conductive material, one side of the slit is used as a base, and the other side is formed from a substantially central portion in the longitudinal direction. 2. The transponder installation structure for a tire according to claim 1, wherein a clamping piece is formed by cutting, and the flexible circuit board of the transponder is clamped by the base and the clamping piece.   The transponder to a tire according to claim 1 or 2, wherein the plurality of holding members are provided radially and at equal intervals on the same circumference provided concentrically with the tire on the inner wall surface of the tire. Installation structure.   The transponder installation structure for a tire according to any one of claims 1 to 3, wherein the holding member is attached to an inner wall surface of the tire with an adhesive.

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