JP2010269670A - Radio communication device and tire including the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication device hardly receiving a radio wave interference, while securing durability, even when the radio communication device including an electronic component and an antenna is provided in a tire, and the tire including the radio communication device. <P>SOLUTION: This radio communication device 100 includes the antenna 10 for transmitting or receiving a radio signal, and the electronic component 20 connected to the antenna 10 and including a memory for recording prescribed information, and is provided in the tire 1. In a cross section along a tire radial direction D and a tread width direction W of the tire 1, the electronic component 20 is provided on the tire radial direction inner side than a rim line L1 passing the rim outermost position P1 to be the tire radial direction outside end of a rim wheel 8 assembled with the tire 1 and extending in the tread width direction W. The antenna 10 is provided in the tire radial direction outside than the rim line L1 and includes an extending/contracting part 12 extending/contracting in the tire radial direction D and a tire peripheral direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention includes an antenna that transmits or receives a radio signal, and an electronic component that is connected to the antenna and includes a memory that records predetermined information, and a radio communication device provided inside the tire and a tire including the radio communication device About.

  2. Description of the Related Art Conventionally, there is known a method of providing a wireless communication device including an electronic component such as a memory that records tire manufacturing management information and an antenna that transmits or receives a wireless signal including manufacturing management information inside the tire. .

  In general, a substrate constituting an electronic component of such a wireless communication device is formed of a low elasticity resin. For this reason, the board cannot follow the bending or expansion / contraction of the tire accompanying the rolling of the tire, and there is a concern that the board breaks and the electronic component breaks down. Therefore, a method of providing a wireless communication device in the vicinity of a bead core with little deformation because it is assembled to a rim wheel formed of metal is known (for example, Patent Document 1).

JP-A-8-67117 (page 3-4, FIG. 1)

However, such wireless communication devices are affected by metallic rim wheels,
There has been a demand for further improvement in that the wireless communication exchanged between the antenna of the wireless communication device and the external communication device is susceptible to radio interference.

  Therefore, the present invention provides a wireless communication device that is provided inside a tire and includes an electronic component and an antenna. The tire includes a wireless communication device and a wireless communication device that are less susceptible to radio wave interference while suppressing the occurrence of a failure of the electronic component. The purpose is to provide.

  In order to solve the above-described problems, the present invention has the following features. First, a first feature of the present invention includes an antenna (antenna 10) that transmits or receives a radio signal, and an electronic component (electronic component 20) that is connected to the antenna and includes a memory that records predetermined information. A wireless communication device (wireless communication device 100) provided inside the tire (tire 1), the cross section of the tire along the tire radial direction (tire radial direction D) and the tread width direction (tread width direction W) The electronic component passes through a tire radial direction outer end (rim outermost position P1) of a rim wheel (rim wheel 8) to which the tire is assembled, and extends from the rim line (rim line L1) along the tread width direction. And the antenna is provided on the outer side in the tire radial direction than the rim line.

  According to such a wireless communication device, in the cross section along the tire radial direction and the tread width direction of the tire, the antenna passes through the outer end in the tire radial direction of the rim wheel and extends beyond the rim line extending along the tread width direction. Since it is provided on the outer side in the tire radial direction, it is less susceptible to radio interference due to the influence of the rim and wheel.

  On the other hand, the electronic component is provided on the inner side in the tire radial direction with respect to the rim line, which is a portion with little deformation accompanying rolling of the tire. Therefore, in the wireless communication device provided in the tire and including the electronic component and the antenna, it is possible to provide a wireless communication device that is less susceptible to radio wave interference while suppressing the occurrence of a failure of the electronic component.

  A second feature of the present invention relates to the first feature of the present invention, wherein the antenna is formed of a metal wire, and the antenna is provided along a tire radial direction and a tire circumferential direction (tire circumferential direction R). A stretchable part (for example, the stretchable part 12) that expands and contracts is provided, and the stretchable part is formed into a wave shape, a zigzag shape, or a spiral shape along the tire circumferential direction.

  A third feature of the present invention relates to the first or second feature of the present invention, and is summarized in that the antenna is coated with the same rubber member as the inside of the tire.

  According to a fourth aspect of the present invention, there is provided a tire including a wireless communication device having an antenna that transmits or receives a wireless signal, and an electronic component that is connected to the antenna and includes a memory that records predetermined information. In the cross section along the tire radial direction and tread width direction of the tire, the electronic component passes through the outer end in the tire radial direction of the rim wheel on which the tire is assembled, and the tire radial direction is longer than the rim line extending along the tread width direction. A tire provided on an inner side, wherein the antenna includes a wireless communication device provided on an outer side in a tire radial direction than the rim line.

  According to the features of the present invention, even when a wireless communication device including an electronic component and an antenna is provided inside a tire, the wireless communication device and the wireless communication device that are resistant to radio wave interference while ensuring durability are provided. Tires can be provided.

1 is a partially exploded perspective view of a tire provided with a wireless communication device according to an embodiment of the present invention. It is sectional drawing of the tire provided with the radio | wireless communication apparatus which concerns on embodiment of this invention. It is the perspective view which showed the radio | wireless communication apparatus which concerns on embodiment of this invention. It is the perspective view which showed the radio | wireless communication apparatus which concerns on the modification of embodiment of this invention. It is the perspective view which showed the radio | wireless communication apparatus which concerns on the modification of embodiment of this invention.

  Next, embodiments of a wireless communication device and a tire according to the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions are different from actual ones.

  Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

[Embodiment]
In the present embodiment, (1) the configuration of the tire, (2) the detailed configuration of the wireless communication device, (3) the modified example, (4) the operation and effect, and (5) other embodiments will be described.

(1) Configuration of Tire FIG. 1 is a partially exploded perspective view of a tire 1 including a wireless communication device 100 according to an embodiment of the present invention. As shown in FIG. 1, the tire 1 includes a wireless communication device 100 therein. The tire 1 includes at least a pair of bead portions 2, a pair of sidewall portions 3, a carcass layer 4, a belt layer 5, a tread portion 6, and an inner liner 7. The tire 1 is assembled to the rim wheel 8.

  The bead portion 2 is a portion that fits into the rim wheel 8 when the tire 1 is fixed to the rim wheel 8. The bead part 2 has at least a bead core 2a and a bead filler 2b. The bead core 2 a becomes the core of the bead part 2. The bead core 2a is formed in a ring shape along the tire circumferential direction R, and is provided at each end of the tire along the tread width direction W. The bead filler 2b is provided between the carcass layers 4 in which the bead core 2a is folded, and suppresses deformation of the bead portion 2.

  The carcass layer 4 constitutes a skeleton of the sidewall portion 3 and is a layer for withstanding a load and an impact and maintaining a tire structure. Specifically, the carcass layer 4 is impregnated with rubber with a metal cord. The cord is arranged along the radial direction (tire radial direction D). Both end portions along the tread width direction W of the carcass layer 4 are folded at the bead portion 2. The belt layer 5 is disposed along the tire circumferential direction R between the carcass layer 4 and a tread portion 6 described later. The inner liner 7 is formed of a highly airtight rubber layer that serves as a tube. The inner liner 7 is provided inside the carcass layer 4.

(2) Detailed Configuration of Wireless Communication Device A detailed configuration of the wireless communication device 100 will be described with reference to FIGS. FIG. 2 is a cross-sectional view of the tire 1 including the wireless communication device 100 according to the embodiment of the present invention. FIG. 3 is a front view of the wireless communication apparatus 100 according to the embodiment of the present invention.

  As shown in FIGS. 2 and 3, the wireless communication device 100 includes an electronic component 20 and an antenna 10 and is provided inside the tire 1.

  The electronic component 20 is connected to the antenna 10 and includes a memory that records predetermined information. The electronic component 20 is provided on the inner side in the tire radial direction than the rim line L1 extending along the tread width direction W through the rim outermost position P1 that is a position on the outer side in the tire radial direction of the rim wheel 8 to which the tire 1 is assembled. . The electronic component 20 is coated with a low elasticity resin.

The antenna 10 transmits or receives a radio signal. The manufacturing control information of the tire 1, for example, a radio signal including a serial number and a usage history is transmitted or received. The antenna 10 is formed of a metal wire having the same rigidity as the metal used for the tire 1. Specifically, the antenna 10 is formed of a metal wire having conductivity such as steel or aluminum. The antenna 10 is provided with an expansion / contraction portion 12 provided on the outer side in the tire radial direction than the rim line L1 and extending and contracting along the tire radial direction D and the tire circumferential direction R. The stretchable part 12 is formed in a wave shape along the tire circumferential direction R. The antenna 10 is provided on the inner side in the tire radial direction than the maximum tire width. The expansion / contraction part 12 is formed in a wave shape having a predetermined cycle, a predetermined length, and a predetermined amplitude according to the frequency at which the antenna 10 is used.

  The electronic component 20 and the antenna 10 coated with a low-elasticity resin are coated with the same rubber member as the inside of the tire. Specifically, the electronic component 20 and the antenna 10 coated with an elastic resin are coated on a rubber sheet 30 made of the same rubber member as the inner liner 7.

(3) Modification Examples The wireless communication device 100 according to the above-described embodiment may be modified as follows. In addition, the same code | symbol is attached | subjected to the same part as the radio | wireless communication apparatus 100 which concerns on embodiment mentioned above, and a different part is mainly demonstrated.

(3.1) Modification Example 1
A configuration of the wireless communication device 100A according to the first modification will be described with reference to FIG. FIG. 4A is a perspective view showing a wireless communication device 100A according to the first modification.

  In the embodiment described above, the expansion / contraction part 12 of the wireless communication device 100 is formed in a wave shape along the tire circumferential direction R. On the other hand, in the first modification, as shown in FIG. 4A, the stretchable part 12A is formed in a zigzag shape along the tire circumferential direction R.

(3.2) Modification 2
A configuration of the wireless communication device 100B according to the modification example 2 will be described with reference to FIG. FIG. 4B is a perspective view showing a wireless communication device 100B according to the second modification.

  In the second modification, as shown in FIG. 4B, the stretchable part 12 </ b> B is formed in a spiral shape along the tire circumferential direction R. Thus, the expansion / contraction part 12 of this invention should just be a shape which expands / contracts along the tire circumferential direction R. FIG.

(3.3) Modification 3
The configuration of the wireless communication device 100C according to the modification example 3 will be described with reference to FIG. FIG. 5A is a perspective view showing a wireless communication device 100C according to the third modification.

  In Modification 3, as shown in FIG. 5A, the antenna 10C is provided along the tire radial direction D from both ends of the electronic component 20 in the tire circumferential direction R. Specifically, the antenna 10C extends to the outer side in the tire radial direction than the rim line. As described above, the antenna 10 </ b> C only needs to be connected to the electronic component 20 and extend outward in the tire radial direction from the rim line.

(3.4) Modification 4
The configuration of the wireless communication device 100D according to the modification example 4 will be described with reference to FIG. FIG. 5B is a perspective view illustrating a wireless communication device 100D according to the fourth modification.

  In the modified example 4, the antenna is provided along the tire radial direction D from both ends in the tire circumferential direction R of the electronic component 20 as shown in FIG. Further, the antenna is provided with a telescopic portion 12D.

(3.5) Modification 5
The configuration of the wireless communication apparatus 100E according to the modification example 5 will be described with reference to FIG. FIG. 5C is a perspective view showing a wireless communication device 100E according to the fifth modification.

  In the modified example 5, as shown in FIG. 5C, the antenna 10E is provided along the tire radial direction D from one end of the electronic component 20 in the tire circumferential direction R. Specifically, the antenna 10E extends to the outer side in the tire radial direction than the rim line.

(4) Action / Effect As described above, according to the present embodiment, the antenna 10 is located on the outer side in the tire radial direction of the rim wheel 8 in the cross section along the tire radial direction D and the tread width direction W of the tire 1. Since it is provided on the outer side in the tire radial direction than the rim line L1 extending along the tread width direction W through the end, it is less susceptible to radio wave interference due to the influence of the rim wheel 8.

  On the other hand, the electronic component 20 is provided on the inner side in the tire radial direction with respect to the rim line L1, which is a portion where deformation due to rolling of the tire is small. Therefore, in the wireless communication device 100 provided in the tire 1 and including the electronic component 20 and the antenna 10, the wireless communication device 100 that is less susceptible to radio wave interference while suppressing the failure of the electronic component 20 and the antenna 10 is provided. it can.

  According to this embodiment, the antenna 10 is formed of a metal wire, and the antenna 10 is provided with the expansion / contraction part 12 that expands and contracts along the tire radial direction D and the tire circumferential direction R. For this reason, the antenna 10 becomes easy to follow the bending or expansion / contraction of the tire accompanying the rolling of the tire.

  Moreover, since the expansion-contraction part 12 is formed in a wave shape along the tire circumferential direction R, it expands and contracts along the tire radial direction D and the tire circumferential direction R. For this reason, it becomes difficult for the antenna 10 to be disconnected. In addition, according to the modified example, the expansion / contraction part 12A and the expansion / contraction part 12B are formed in a zigzag shape or a spiral shape along the tire circumferential direction R. To do. That is, even if the antenna 10 is provided at a place where it is easily deformed, the occurrence of a failure due to disconnection can be suppressed.

  According to this embodiment, the antenna 10 is coated with the same rubber member as the inside of the tire 1. For this reason, the coating layer of the antenna 10 is deformed similarly to the tire 1. That is, since the antenna 10 can easily follow the bending or expansion / contraction of the tire accompanying the rolling of the tire, the load applied to the antenna 10 can be reduced and the occurrence of failure can be further suppressed.

  According to the present embodiment, even when the wireless communication device 100 including the electronic component 20 and the antenna 10 is provided inside, the wireless communication device is less susceptible to radio wave interference while suppressing the occurrence of the failure of the electronic component 20 and the antenna 10. A tire 1 including the communication device 100 can be provided.

(5) Other Embodiments As described above, the contents of the present invention have been disclosed through the embodiments of the present invention. However, it is understood that the description and drawings constituting a part of this disclosure limit the present invention. Should not. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  In the above-described embodiment, the antenna 10 of the wireless communication device 100 is disposed from the bead portion 2 to the sidewall portion 3, but is not limited thereto, and communication with the outside is performed outside the rim line L <b> 1 in the tire radial direction. You may arrange | position in the favorable arbitrary places.

  In the embodiment described above, the connection portion between the antenna 10 and the electronic component 20 is not particularly defined. However, the strength of the connection portion may be increased in consideration of the rigidity difference between the antenna 10 and the electronic component 20. For example, the antenna 10 may be firmly connected to the electronic component 20 by thickening a metal wire at a connection portion with the electronic component 20.

  In the embodiment described above, the expansion / contraction part 12 is provided on the outer side in the tire radial direction than the rim line L1, but all the outer side in the tire radial direction than the rim line L1 may be configured by the expansion / contraction part 12.

  As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

D ... tire radial direction, L1 ... rim line, P1 ... rim outermost position, R ... tire circumferential direction, W ... tread width direction, 1 ... tire, 2 ... bead part, 2a ... bead core, 2b ... bead filler, 3 ... side Wall part, 4 ... carcass layer, 5 ... belt layer, 6 ... tread part, 7 ... inner liner, 8 ... rim wheel, 10 ... antenna, 12, 12A, 12B ... expandable part, 20 ... electronic component, 30 ... rubber Sheet, 100, 100A, 100B ... wireless communication device

Claims (4)

A wireless communication device provided inside a tire, comprising an antenna that transmits or receives a radio signal, and an electronic component that is connected to the antenna and includes a memory that records predetermined information,
In the cross section along the tire radial direction and tread width direction of the tire,
The electronic component is
The tire is assembled on the inner side in the tire radial direction from the rim line extending along the tread width direction through the tire radial direction outer end of the rim wheel.
The antenna is
A wireless communication device provided outside the rim line in the tire radial direction. The antenna is formed by a metal wire,
The antenna is provided with an expansion / contraction portion that expands and contracts along the tire radial direction and the tire circumferential direction,
The wireless communication device according to claim 1, wherein the stretchable portion is formed in a wave shape, a zigzag shape, or a spiral shape along a tire circumferential direction.   The wireless communication device according to claim 1, wherein the antenna is coated with the same rubber member as the inside of the tire. A tire including a wireless communication device having an antenna that transmits or receives a wireless signal, and an electronic component that is connected to the antenna and includes a memory that records predetermined information,
In the cross section along the tire radial direction and tread width direction of the tire,
The electronic component is
The tire is assembled on the inner side in the tire radial direction from the rim line extending along the tread width direction through the tire radial direction outer end of the rim wheel.
The antenna includes
Provided on the outer side in the tire radial direction than the rim line,
A tire including a wireless communication device provided with an expansion / contraction portion that expands and contracts along a tire radial direction and a tire circumferential direction.

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