Pneumatic tire

Abstract

To provide a pneumatic tire that can achieve both of wireless tag communication performance and durability performance.SOLUTION: A pneumatic tire 1 includes: a tread part 2; a pair of bead parts 4; a carcass 6 extending between the pair of bead parts 4; a reinforcement layer 7 which is arranged outside a tire radial direction of the carcass 6 at the tread part 2; and a wireless tag 8 which is arranged inside the tire radial direction of the carcass 6 at the tread part 2. The reinforcement layer 7 includes at least one reinforcement ply 7A in which reinforcement cords 7a are arranged. The wireless tag 8 includes an electronic component body 9 which defines a longer direction D, and an antenna part 10 which is spirally wound along the longer direction D around the electronic component body 9. The longer direction D of the wireless tag 8 is a direction crossing all reinforcement cords 7a.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a pneumatic tire having a wireless tag. [Background technology]

[0002] Conventionally, pneumatic tires with wireless tags have been known. For example, Patent Document 1 below proposes a tire with a tag member sandwiched between the outer apex and the sidewall, and with improved tag readability. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7323023 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the sidewall portion is prone to distortion when a load is applied, and even in the tire of Patent Document 1, damage caused by the wireless tag can occur during long-term use, so there was a demand for further improvement in durability performance.

[0005] The present invention has been devised in view of the above circumstances, and has as its main object to provide a pneumatic tire that can achieve both high wireless tag communication performance and durability. [Means for solving the problem]

[0006] The present invention is a pneumatic tire including a tread portion, a pair of bead portions, a carcass spanning between the pair of bead portions, a reinforcing layer arranged radially outward of the carcass in the tread portion, and a wireless tag arranged radially inward of the carcass in the tread portion, wherein the reinforcing layer includes at least one reinforcing ply in which reinforcing cords are arranged, and the wireless tag includes an electronic component body that defines a longitudinal direction, and an antenna portion wound in a spiral shape around the electronic component body along the longitudinal direction, and the longitudinal direction of the wireless tag is a direction that intersects all of the reinforcing cords. [Effects of the Invention]

[0007] The pneumatic tire of the present invention has the above-described configuration, and thus can achieve both the communication performance and durability of the wireless tag. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view showing an embodiment of a pneumatic tire of the present invention. [Figure 2] FIG. [Figure 3] FIG. 2 is a schematic diagram showing an arrangement of wireless tags. [Figure 4] FIG. 10 is an enlarged cross-sectional view showing a modified example of the tread portion. [Figure 5] FIG. 10 is a cross-sectional view of a pneumatic tire according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 1 is a tire meridian cross-sectional view showing a pneumatic tire 1 of this embodiment in a normal state. Here, the "normal state" refers to a state in which the pneumatic tire 1 is mounted on a normal rim, adjusted to a normal internal pressure, and no load is applied. Unless otherwise specified below, the dimensions of each part of the pneumatic tire 1 are values ​​measured in this normal state.

[0010] If there is a standard system including the standard on which the pneumatic tire 1 is based, a "genuine rim" is a rim defined for each tire by that standard, for example, a "standard rim" for JATMA, a "design rim" for TRA, or a "measuring rim" for ETRTO. If there is no standard system including the standard on which the pneumatic tire 1 is based, a "genuine rim" is a rim with the smallest rim diameter and the smallest rim width among rims that can be assembled and do not cause air leakage.

[0011] "Normal internal pressure" is the air pressure set for each tire by a standard set by the JATMA, the maximum value listed in the table "TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES" for the TRA, and the "INFLATION PRESSURE" for the ETRTO. If there is no standard set that includes the standard set by the pneumatic tire 1, "normal internal pressure" is the air pressure set for each tire by the manufacturer, etc.

[0012] As shown in Fig. 1, the pneumatic tire 1 of this embodiment includes a tread portion 2, a pair of sidewall portions 3, and a pair of bead portions 4. The tread portion 2 constitutes the contact surface 2s. The pair of sidewall portions 3 extend radially inward from both axial sides of the tread portion 2.

[0013] Each of the pair of bead portions 4 is located radially inward of each of the pair of sidewall portions 3 and is in contact with the rim. Each of the pair of bead portions 4 has, for example, an annular bead core 5 extending in the tire circumferential direction. The bead core 5 is formed, for example, from steel wire.

[0014] The pneumatic tire 1 of this embodiment includes a carcass 6 spanning a pair of bead portions 4, and a reinforcing layer 7 disposed radially outward of the carcass 6 in the tread portion 2. In such a pneumatic tire 1, the reinforcing layer 7 can suppress distortion of the tread portion 2 when a load is applied.

[0015] The reinforcing layer 7 of this embodiment includes at least one reinforcing ply 7A in which reinforcing cords 7a are arranged. The reinforcing cords 7a are formed of a metal such as steel. Such a reinforcing layer 7 can more reliably suppress distortion of the tread portion 2 when a load is applied.

[0016] The pneumatic tire 1 of this embodiment includes a wireless tag 8 arranged in the tread portion 2 on the radially inner side of the carcass 6. In such a pneumatic tire 1, the wireless tag 8 is arranged in the tread portion 2 where distortion is small, so that external forces acting on the wireless tag 8 are reduced, and the durability of the wireless tag 8 can be improved.

[0017] Fig. 2 is an enlarged perspective view of the wireless tag 8. As shown in Fig. 2, the wireless tag 8 of this embodiment includes an electronic component body 9 that defines a longitudinal direction D, and an antenna unit 10 that is wound in a spiral shape around the electronic component body 9 along the longitudinal direction D. The wireless tag 8 is an RFID tag for managing data such as manufacturing management, customer information, and driving history of the pneumatic tire 1, for example. Such a wireless tag 8 can communicate data recorded in the electronic component body 9 to an external device via the antenna unit 10.

[0018] Fig. 3 is a schematic diagram showing the arrangement of a wireless tag 8. As shown in Fig. 3, the longitudinal direction D of the wireless tag 8 of this embodiment is a direction that intersects with all of the reinforcing cords 7a. In other words, even if the reinforcing layer 7 includes multiple reinforcing plies 7A and the reinforcing cords 7a of each of the multiple reinforcing plies 7A are arranged in directions that intersect with each other, the longitudinal direction D of the wireless tag 8 is a direction that intersects with all of the reinforcing cords 7a. This means that there are no reinforcing cords 7a that are parallel to the longitudinal direction D of the wireless tag 8.

[0019] In such a wireless tag 8, the direction of the magnetic field generated by the antenna unit 10 intersects with the direction of the reinforcing cord 7a, thereby improving communication performance. Therefore, the pneumatic tire 1 of this embodiment can achieve both communication performance and durability of the wireless tag 8.

[0020] In a more preferred embodiment, the smallest angle θ1 between the longitudinal direction D of the wireless tag 8 and the reinforcing cord 7a is 30° or greater. By making the smallest angle θ1 30° or greater, it is possible to prevent the direction of the magnetic field generated by the antenna unit 10 and the direction of the reinforcing cord 7a from becoming parallel. From this perspective, the smallest angle θ1 is more preferably 60° or greater.

[0021] As shown in Figure 2, the electronic component body 9 includes chips such as a transceiver circuit, a control circuit, and a memory. The electronic component body 9 preferably has a generally cylindrical shape overall. Such an electronic component body 9 has good strength against external forces, and can reduce failures and damage, improving durability. The axial direction of the generally cylindrical electronic component body 9 defines the longitudinal direction D.

[0022] The length L1 of the electronic component body 9 in the longitudinal direction D is preferably 10 to 30 mm. When the length L1 of the electronic component body 9 is 10 mm or more, a large chip can be provided, which helps improve communication performance. When the length L1 of the electronic component body 9 is 30 mm or less, deformation when an external force is applied can be suppressed, and durability can be improved.

[0023] The outer diameter d1 of the electronic component body 9 is preferably 0.5 to 1.5 mm. When the outer diameter d1 of the electronic component body 9 is 0.5 mm or more, a large chip can be provided, which helps to improve communication performance. When the outer diameter d1 of the electronic component body 9 is 1.5 mm or less, damage originating from the wireless tag 8 is suppressed, which helps to improve the durability of the pneumatic tire 1.

[0024] The length L2 of the antenna unit 10 in the longitudinal direction D is preferably 30 to 60 mm. When the length L2 of the antenna unit 10 is 30 mm or more, a strong magnetic field can be generated, and communication performance can be improved. When the length L2 of the antenna unit 10 is 60 mm or less, damage originating from the wireless tag 8 is suppressed, which helps to improve the durability of the pneumatic tire 1.

[0025] The maximum outer diameter of the antenna portion 10 is preferably 1.3 to 1.9 mm. When the maximum outer diameter of the antenna portion 10 is 1.3 mm or more, a strong magnetic field can be generated, improving communication performance. When the maximum outer diameter of the antenna portion 10 is 1.9 mm or less, damage originating from the wireless tag 8 is suppressed, which helps to improve the durability of the pneumatic tire 1.

[0026] The antenna section 10 of this embodiment includes a central section 10a located around the electronic component body 9, and a pair of extension sections 10b located on both sides of the central section 10a in the longitudinal direction D. In this case, the wireless tag 8 has a length L2 of the antenna section 10 that is greater than the length L1 of the electronic component body 9. Such a wireless tag 8 can generate a strong magnetic field, thereby improving communication performance.

[0027] The outer diameter d2 of the central portion 10a is preferably larger than the outer diameter d3 of each of the pair of extension portions 10b. The maximum outer diameter of the antenna portion 10 of this embodiment is the outer diameter d2 of the central portion 10a. By reducing the size of the extension portions 10b, such an antenna portion 10 helps to suppress damage originating from the wireless tag 8 and improve the durability of the pneumatic tire 1.

[0028] The wireless tag 8 of this embodiment includes a pair of plate-shaped rubber layers 11. The electronic component body 9 and the antenna section 10 are preferably disposed between the pair of rubber layers 11. In such a wireless tag 8, the electronic component body 9 and the antenna section 10 can be protected by the pair of rubber layers 11, and durability can be improved.

[0029] The length L3 in the longitudinal direction D of each of the pair of rubber layers 11 is preferably 45 to 70 mm. When the length L3 of the rubber layer 11 is 45 mm or more, it is possible to cover the entire electronic component body 9 and the antenna portion 10, which helps to improve durability. When the length L3 of the rubber layer 11 is 70 mm or less, it is possible to suppress damage originating from the wireless tag 8, which helps to improve durability of the pneumatic tire 1.

[0030] The width W1 of each of the pair of rubber layers 11 in the direction perpendicular to the longitudinal direction D is preferably 8 to 15 mm. When the width W1 of the rubber layer 11 is 8 mm or more, it is possible to cover the entire electronic component body 9 and the antenna portion 10, which helps to improve durability. When the width W1 of the rubber layer 11 is 15 mm or less, it is possible to suppress damage originating from the wireless tag 8, which helps to improve durability of the pneumatic tire 1.

[0031] The thickness t1 of each of the pair of rubber layers 11 is preferably 1.0 to 1.5 mm. When the thickness t1 of the rubber layer 11 is 1.0 mm or more, the electronic component body 9 and the antenna portion 10 can be reliably covered, which helps to improve durability. When the thickness t1 of the rubber layer 11 is 1.5 mm or less, damage originating from the wireless tag 8 is suppressed, which helps to improve durability of the pneumatic tire 1.

[0032] The pair of rubber layers 11 each have an electrical resistivity of 10 10 It is preferable that the electrical resistivity of each of the pair of rubber layers 11 is 10 Ω·cm or more. Such a rubber layer 11 can suppress attenuation of electromagnetic waves when they pass through, thereby improving communication performance. From this perspective, the electrical resistivity of each of the pair of rubber layers 11 is more preferably 10 12 Ω·cm or more.

[0033] 1, the carcass 6 includes at least one carcass ply, and in this embodiment, two carcass plies 6A and 6B. The two carcass plies 6A and 6B include, for example, a first carcass ply 6A located on the inner side in the tire radial direction in the tread portion 2, and a second carcass ply 6B located on the outer side in the tire radial direction of the first carcass ply 6A.

[0034] At least one of the carcass plies 6A, 6B preferably includes a main body portion 6a extending from the tread portion 2 through the sidewall portion 3 to the bead cores 5 of the bead portions 4, and a turned-up portion 6b continuing to the main body portion 6a and folded back from the axially inner side to the axially outer side around the bead cores 5. The first carcass ply 6A and the second carcass ply 6B of this embodiment each include a main body portion 6a and a turned-up portion 6b.

[0035] The carcass plies 6A, 6B include carcass cords (not shown) made of, for example, organic fiber cords, such as cords made of one or more hybrid fibers selected from the group consisting of polyethylene terephthalate fiber, polyethylene naphthalate fiber, nylon fiber, aramid fiber, and rayon fiber.

[0036] The carcass cords are preferably arranged at an angle of 25 to 90° with respect to the tire circumferential direction. Here, the angle of the carcass cords is the angle in the pneumatic tire 1 in a normal state, and can be confirmed by, for example, partially peeling off the tread portion 2.

[0037] When the carcass cords are inclined at an angle of less than 90° with respect to the tire circumferential direction, it is desirable that the carcass cords of the first carcass ply 6A and the carcass cords of the second carcass ply 6B be inclined in opposite directions with respect to the tire circumferential direction. The carcass 6 may have, for example, a bias structure.

[0038] The reinforcing layer 7 of this embodiment includes, in the tread portion 2, a belt layer 12 arranged radially outward of the carcass 6, and a band layer 13 arranged radially outward of the belt layer 12. When the carcass 6 has a bias structure, the reinforcing layer 7 may include, for example, a breaker layer. Such a reinforcing layer 7 helps to suppress distortion of the tread portion 2 and improve the durability of the wireless tag 8.

[0039] The belt layer 12 includes at least one belt ply, and in this embodiment, two belt plies 12A and 12B. The two belt plies 12A and 12B include, for example, a first belt ply 12A located on the inner side in the tire radial direction and a second belt ply 12B located on the outer side in the tire radial direction of the first belt ply 12A.

[0040] The belt plies 12A and 12B include belt cords made of, for example, steel cords. In this embodiment, the belt cords constitute the reinforcing cords 7a (shown in FIG. 3). The belt cords may be, for example, solid steel wires or twisted wires made by twisting together a plurality of steel filaments.

[0041] The belt cords are arranged at an angle of, for example, 10 to 30° with respect to the tire circumferential direction. It is desirable that the belt cords of the first belt ply 12A and the belt cords of the second belt ply 12B are inclined in opposite directions with respect to the tire circumferential direction.

[0042] Such a belt layer 12 can increase the rigidity of the tread portion 2 in a balanced manner and suppress distortion of the tread portion 2. Here, the angle of the belt cord is the angle in the pneumatic tire 1 in a normal state, and can be confirmed by, for example, partially peeling off the tread portion 2.

[0043] At least one of the belt plies 12A, 12B includes an outermost belt ply disposed radially outward of the tire. In this embodiment, the outermost belt ply is the second belt ply 12B. For example, when the belt layer 12 includes only one belt ply 12A, the first belt ply 12A, the first belt ply 12A constitutes the outermost belt ply.

[0044] The wireless tag 8 is arranged in the tire axial direction within the width W2 of the outermost belt ply, which in this embodiment is the second belt ply 12B. Since such a wireless tag 8 is arranged in a part of the tread portion 2 where distortion is small, durability can be improved.

[0045] The wireless tag 8 of this embodiment is arranged in the tire axial direction within a range of half the width W2 of the second belt ply 12B, which is the outermost belt ply, centered on the tire equator C. Since such a wireless tag 8 is arranged in a part of the tread portion 2 where distortion is smallest, durability can be improved more reliably.

[0046] The band layer 13 includes at least one band ply 13A, one in this embodiment, and a pair of edge bands 13B that cover the outer sides of the band ply 13A in the tire axial direction. It is desirable that the band ply 13A and the edge band 13B each have at least one band cord arranged at an angle of 5° or less with respect to the tire circumferential direction. Here, the angle of the band cord is the angle in the pneumatic tire 1 in a normal state, and can be confirmed, for example, by partially peeling off the tread portion 2.

[0047] The band cord is made of, for example, metal or organic fiber. When the band cord is made of metal, it is desirable that the band cord is made of a single steel wire or a stranded wire made by twisting together multiple steel filaments, the surface of which is plated or ternary plated. When the band cord is made of metal, the reinforcing cord 7a (shown in FIG. 3) may include the band cord.

[0048] When the band cord is made of organic fibers, it is desirable that the band cord be formed from one type of fiber selected from the group consisting of polyethylene terephthalate fibers, polyethylene naphthalate fibers, nylon fibers, aramid fibers, and rayon fibers, or a hybrid fiber of two or more types of fibers.

[0049] The pneumatic tire 1 of this embodiment includes an inner liner 14 arranged on the tire cavity surface side of the carcass 6. The wireless tag 8 of this embodiment is arranged on the cavity surface of the inner liner 14. Such a wireless tag 8 can be separated from the reinforcing cord 7a (shown in FIG. 3), thereby improving communication performance.

[0050] Fig. 4 is an enlarged cross-sectional view showing a modified example of the tread portion 2. As shown in Fig. 4, the wireless tag 8 may be disposed, for example, between the carcass 6 and the inner liner 14. Such a wireless tag 8 can maintain a stable arrangement even when a large external force is applied when a load is applied, thereby improving durability.

[0051] The distance L4 in the tire radial direction from the inner surface 12a of the belt layer 12 in the tire radial direction to the center of the wireless tag 8 is preferably 25% to 400% of the distance L5 in the tire radial direction from the outer surface 12b of the belt layer 12 in the tire radial direction to the ground contact patch 2s. By making the distance L4 25% or more of the distance L5, the wireless tag 8 can be spaced apart from the reinforcing cord 7a (shown in FIG. 3), and communication performance can be improved.

[0052] By setting the distance L4 to 400% or less of the distance L5, even when the wireless tag 8 is placed on a sound absorbing material 22 (shown in FIG. 5) described later, it is possible to prevent the sound absorbing material 22 from becoming excessively large. Note that when the sound absorbing material 22 is not placed, the distance L4 is preferably 100% or less of the distance L5.

[0053] 5 is a tire meridian cross-sectional view showing a pneumatic tire 21 in a normal state according to another embodiment. The same components as those in the above-described embodiment are denoted by the same reference numerals, and a description thereof will be omitted. As shown in FIG. 5, the pneumatic tire 21 of this embodiment includes a tread portion 2, a pair of sidewall portions 3, and a pair of bead portions 4, similar to the above-described pneumatic tire 1.

[0054] Like the above-described pneumatic tire 1, the pneumatic tire 21 includes a carcass 6, a reinforcing layer 7, and an inner liner 14. The pneumatic tire 21 of this embodiment includes a sound-absorbing material 22 disposed on the tire cavity surface of the inner liner 14. Such a pneumatic tire 1 can improve noise performance.

[0055] Similar to the pneumatic tire 1 described above, the pneumatic tire 21 of this embodiment includes a wireless tag 8 disposed in the tread portion 2 on the radially inner side of the carcass 6. The wireless tag 8 is preferably disposed in the sound-absorbing material 22. The wireless tag 8 of this embodiment is disposed on the inner surface 22a of the sound-absorbing material 22. In such a pneumatic tire 1, the distance L4 (shown in FIG. 4) between the wireless tag 8 and the reinforcing layer 7 can be increased, thereby improving communication performance.

[0056] The maximum thickness t2 of the sound-absorbing material 22 is preferably 5 mm or more. Such a sound-absorbing material 22 has excellent sound-absorbing performance. Furthermore, such a sound-absorbing material 22 can reliably increase the distance L4 (shown in FIG. 4) between the wireless tag 8 and the reinforcing layer 7, thereby improving communication performance.

[0057] Although not shown in the drawings, the wireless tag 8 may be disposed, for example, inside the sound-absorbing material 22. Such a wireless tag 8 can be improved in durability because it is protected by the sound-absorbing material 22. Furthermore, the wireless tag 8 can maintain a stable arrangement even if a large external force is applied when a load is applied, thereby improving durability.

[0058] Although a particularly preferred embodiment of the present invention has been described in detail above, the present invention is not limited to the above-described embodiment and can be modified and practiced in various ways.

[0059] [Note] The present invention is as follows.

[0060] [Invention 1] A pneumatic tire, A tread portion; a pair of bead portions; a carcass extending between the pair of bead portions; a reinforcing layer disposed radially outward of the carcass in the tread portion; a wireless tag disposed in the tread portion on the inner side of the carcass in the tire radial direction, the reinforcing layer includes at least one reinforcing ply in which reinforcing cords are arranged, the wireless tag includes an electronic component body defining a longitudinal direction, and an antenna portion wound in a spiral shape around the electronic component body along the longitudinal direction, the longitudinal direction of the wireless tag is a direction intersecting all of the reinforcing cords; Pneumatic tires.

[0061] [Invention 2] The pneumatic tire according to aspect 1, wherein the antenna portion includes a central portion located around the electronic component body and a pair of extension portions located on both sides of the central portion in the longitudinal direction.

[0062] [Invention 3] 3. The pneumatic tire according to claim 2, wherein the antenna portion has an outer diameter of 1.3 to 1.9 mm.

[0063] [Invention 4] The pneumatic tire according to Invention 3, wherein the outer diameter of the central portion is larger than the outer diameter of each of the pair of extension portions.

[0064] [Invention 5] The wireless tag includes a pair of rubber layers formed into a plate shape, 5. The pneumatic tire according to any one of claims 1 to 4, wherein the electronic component body and the antenna portion are disposed between the pair of rubber layers.

[0065] [Invention 6] The pair of rubber layers each have an electrical resistivity of 10 10 6. The pneumatic tire according to claim 5, wherein the pneumatic tire has a compressive strength of Ω·cm or more.

[0066] [Invention 7] 7. The pneumatic tire according to claim 5 or 6, wherein the pair of rubber layers each have a thickness of 1.0 to 1.5 mm.

[0067] [Invention 8] the reinforcing layer includes a belt layer including at least one belt ply, the at least one belt ply includes an outermost belt ply disposed outermost in the tire radial direction, 8. The pneumatic tire according to any one of claims 1 to 7, wherein the wireless tag is arranged within the range of the outermost belt ply in the tire axial direction.

[0068] [Invention 9] 9. The pneumatic tire according to claim 8, wherein the wireless tag is arranged within a range of half the width of the outermost belt ply around the tire equator in the tire axial direction.

[0069] [Invention 10] The pneumatic tire according to invention 8 or 9, wherein the distance in the tire radial direction from the inner surface of the belt layer in the tire radial direction to the center of the wireless tag is 25% to 400% of the distance in the tire radial direction from the outer surface of the belt layer in the tire radial direction to the ground contact surface.

[0070] [Invention 11] An inner liner disposed on the tire cavity surface side of the carcass, 11. The pneumatic tire according to any one of claims 1 to 10, wherein the wireless tag is disposed between the carcass and the inner liner.

[0071] [Invention 12] a sound-absorbing material disposed on the tire cavity surface; 11. The pneumatic tire according to any one of claims 1 to 10, wherein the wireless tag is disposed on the sound absorbing material.

[0072] [Invention 13] 13. The pneumatic tire according to any one of claims 1 to 12, wherein the smallest angle formed between the longitudinal direction of the wireless tag and the reinforcing cord is 30° or more. [Explanation of symbols]

[0073] 1 pneumatic tire 2 Tread section 4 Bead section 6. Carcass 7 Reinforcement layer 7A Reinforcement ply 7a Reinforcement cord 8. Radio tags 9 Electronic component body 10 Antenna section

Claims

1. A pneumatic tire, A tread portion; a pair of bead portions; a carcass extending between the pair of bead portions; a reinforcing layer disposed radially outward of the carcass in the tread portion; a wireless tag disposed in the tread portion on the inner side of the carcass in the tire radial direction, the reinforcing layer includes at least one reinforcing ply in which reinforcing cords are arranged, the wireless tag includes an electronic component body defining a longitudinal direction, and an antenna portion wound in a spiral shape around the electronic component body along the longitudinal direction, the longitudinal direction of the wireless tag is a direction intersecting all of the reinforcing cords; Pneumatic tires.

2. The pneumatic tire according to claim 1 , wherein the antenna portion includes a central portion located around the electronic component body and a pair of extension portions located on both sides of the central portion in the longitudinal direction.

3. 3. The pneumatic tire according to claim 2, wherein the antenna portion has an outer diameter of 1.3 to 1.9 mm.

4. The pneumatic tire according to claim 3 , wherein the outer diameter of the central portion is larger than the outer diameter of each of the pair of extension portions.

5. The wireless tag includes a pair of rubber layers formed in a plate shape, The pneumatic tire according to claim 1 , wherein the electronic component body and the antenna portion are disposed between the pair of rubber layers.

6. The pair of rubber layers each have an electrical resistivity of 10 １０ The pneumatic tire according to claim 5 , wherein the pneumatic tire has a compressive strength of Ω·cm or more.

7. 6. The pneumatic tire according to claim 5, wherein the thickness of each of the pair of rubber layers is 1.0 to 1.5 mm.

8. the reinforcing layer includes a belt layer including at least one belt ply, the at least one belt ply includes an outermost belt ply disposed outermost in the tire radial direction, The pneumatic tire according to claim 1 , wherein the wireless tag is arranged within a range of the outermost belt ply in the tire axial direction.

9. The pneumatic tire according to claim 8 , wherein the wireless tag is arranged within a range of half the width of the outermost belt ply around the tire equator in the tire axial direction.

10. 9. The pneumatic tire according to claim 8, wherein a distance in the tire radial direction from an inner surface of the belt layer in the tire radial direction to a center of the wireless tag is 25% to 400% of a distance in the tire radial direction from an outer surface of the belt layer in the tire radial direction to a ground contact surface.

11. An inner liner disposed on the tire cavity surface side of the carcass, The pneumatic tire according to claim 1 , wherein the wireless tag is disposed between the carcass and the inner liner.

12. a sound-absorbing material disposed on the tire cavity surface; The pneumatic tire according to claim 1 , wherein the wireless tag is disposed on the sound absorbing material.

13. The pneumatic tire according to claim 1 , wherein the smallest angle formed between the longitudinal direction of the wireless tag and the reinforcing cord is equal to or greater than 30°.

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