tire

Abstract

The tire according to this disclosure includes a first half on the outer side of the vehicle mounting relative to the tire equator and a second half on the inner side of the vehicle mounting, and is provided with a tire carcass extending between a first bead core located in the first half and a second bead core located in the second half, wherein: the tire carcass includes a tire carcass body portion extending between the first bead core and the second bead core, a first tire carcass reversal portion extending from the tire carcass body portion and reversing around the first bead core, and a second tire carcass reversal portion extending from the tire carcass body portion and reversing around the second bead core; a first end of the first tire carcass reversal portion is located radially outer of the second end of the second tire carcass reversal portion; and a communication device is embedded in the tire sidewall portion of the first half radially inner of the first end and radially outer of the second end.

Description

Technical Field

[0001] This disclosure relates to tires. Background Technology

[0002] Constructions that embed communication devices, such as RF tags, in tires are known. For example, Patent Document 1 describes a tire having an RF tag disposed in the sidewall of the tire.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-55450 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] In conventional tires, the communication devices installed within them may be damaged due to the load applied when a load is applied to the tire. Therefore, there is still a need to improve the durability of communication devices installed in tires.

[0008] In view of these circumstances, it would be helpful to provide a tire that improves the durability of communication devices arranged in the tire.

[0009] Solution for solving the problem

[0010] The tire according to this disclosure includes a first half on the outer side of the vehicle mounting relative to the tire equator and a second half on the inner side of the vehicle mounting. The tire includes: a carcass extending between a first bead core located in the first half and a second bead core located in the second half. The carcass includes: a carcass body portion extending circumferentially between the first bead core and the second bead core; a first carcass fold-back portion extending from the carcass body portion, folding back around the periphery of the first bead core from the inner side in the tire width direction to the outer side in the tire width direction, and extending radially outward; and a second carcass fold-back portion extending from the carcass body portion, folding back around the periphery of the second bead core from the inner side in the tire width direction to the outer side in the tire width direction, and extending radially outward. A first end portion of the first carcass fold-back portion is positioned radially outward than a second end portion of the second carcass fold-back portion. A communication device is embedded in the sidewall portion of the first half in a manner that is radially inner than the first end portion and radially outward than the second end portion.

[0011] The effects of the invention

[0012] According to this disclosure, a tire that improves the durability of a communication device disposed in the tire can be provided. Attached Figure Description

[0013] [ Figure 1 ] Figure 1 This is a cross-sectional view of the tire in the tire width direction according to the first embodiment of the present disclosure.

[0014] [ Figure 2 ] Figure 2 yes Figure 1 The cross-sectional view in the tire width direction of the first variant of the tire shown.

[0015] [ Figure 3 ] Figure 3 yes Figure 1 The cross-sectional view in the tire width direction of the second variant of the tire shown.

[0016] [ Figure 4 ] Figure 4 This is a cross-sectional view of the tire in the tire width direction according to the second embodiment of this disclosure. Detailed Implementation

[0017] The following description, with reference to the accompanying drawings, illustrates embodiments of the tire according to this disclosure. Common components and parts in the figures are referred to by the same reference numerals. However, it should be noted that the figures are schematic, and the scale of dimensions, etc., may differ from reality.

[0018] In this manual, "tire width direction" refers to the direction parallel to the tire's axis of rotation. "Tire radial direction" refers to the direction perpendicular to the tire's axis of rotation. "Tire circumferential direction" refers to the direction in which the tire rotates about its axis of rotation.

[0019] Furthermore, in this specification, "inner radial side of the tire" refers to the side closer to the tire's axis of rotation along the tire's radial direction, while "outer radial side of the tire" refers to the side further away from the tire's axis of rotation along the tire's radial direction. On the other hand, "inner radial side of the tire's width direction" refers to the side closer to the tire's equatorial plane CL along the tire's width direction, while "outer radial side of the tire's width direction" refers to the side further away from the tire's equatorial plane CL along the tire's width direction.

[0020] In this specification, "tire equatorial plane" refers to the plane perpendicular to the bead line at the midpoint of the bead line in the cross section of the tire in the tire width direction. The bead line is a straight line connecting the centers of a pair of bead cores.

[0021] In this specification, unless otherwise stated, the positional relationships of various tire components are measured under reference conditions. "Reference conditions" refers to the state in which the tire is fitted to a suitable rim, a specified internal pressure is applied, and no load is applied. The following describes a tire having an air-filled cavity and being mounted on a vehicle (such as a passenger car). However, the tire's cavity may be filled with fluid other than air, and the tire may be mounted on vehicles other than passenger cars.

[0022] In this specification, "applicable rim" refers to a standard rim of applicable size that is already recorded or will be recorded in the future in an industry standard valid in the region where the tire is manufactured and used (measuring rims in the ETRO standards manual and design rims in the TRA yearbook). Such industry standards include the JATMA (Japan Automobile Tire Manufacturers Association) yearbook in Japan, the ETRO (European Tire & Rim Technology Organization) standards manual in Europe, and the TRA (Tire & Rim Association) yearbook in the United States. In cases where a size is not listed in these industry standards, "applicable rim" refers to a rim with a width corresponding to the tire's bead width. "Applicable rim" includes both current and future sizes listed in the aforementioned industry standards. An example of "sizes to be recorded in the future" could be sizes recorded as "FUTURE DEVELOPMENTS" in the 2013 edition of the ETRO standards manual.

[0023] In this specification, "specified internal pressure" refers to the air pressure (maximum air pressure) corresponding to the maximum load capacity of a single wheel for the applicable dimensions and ply ratings specified in the aforementioned JATMA Yearbook or other industry standards. For dimensions not specified in the aforementioned industry standards, "specified internal pressure" refers to the air pressure (maximum air pressure) corresponding to the maximum load capacity specified for each vehicle equipped with the tire. Furthermore, in this specification, "specified load" refers to the load corresponding to the maximum load capacity of a single wheel for the applicable dimensions and ply ratings specified in the aforementioned industry standards. For dimensions not specified in the aforementioned industry standards, "specified load" refers to the load corresponding to the maximum load capacity specified for each vehicle equipped with the tire.

[0024] (First Implementation)

[0025] The tire 1 according to the first embodiment of the present disclosure will be described below with reference to the accompanying drawings.

[0026] Figure 1 This is a cross-sectional view of the tire 1 according to the first embodiment of the present disclosure, taken along the tire width direction.

[0027] Tire 1 includes a first half 11 on the outer side of the vehicle mounting relative to the tire equatorial plane CL and a second half 12 on the inner side of the vehicle mounting. In this specification, "outer side of the vehicle mounting" of tire 1 refers to the side of tire 1 away from the center of the vehicle when tire 1 is mounted on the vehicle, while "inner side of the vehicle mounting" of tire 1 refers to the side of tire 1 closer to the center of the vehicle when tire 1 is mounted on the vehicle.

[0028] Tire 1 has a pair of bead portions 2, a pair of sidewall portions 3, and a tread portion 4. The sidewall portions 3 extend between the tread portion 4 and the bead portions 2. The pair of bead portions 2 includes a first bead portion 21 located in a first half 11 and a second bead portion 22 located in a second half 12. The pair of sidewall portions 3 includes a first sidewall portion 31 located in the first half 11 and a second sidewall portion 32 located in the second half 12. The tread portion 4 extends through the first half 11 and the second half 12. As detailed below, a communication device 9 is embedded in the first sidewall portion 31 of the first half 11 of tire 1.

[0029] Tire 1 includes a pair of bead cores 5, a carcass 6, and a belt 7. The pair of bead cores 5 are respectively disposed in a pair of bead portions 2. The carcass 6 includes one or more ply layers extending annularly between the pair of bead cores 5. The belt 7 includes one or more belt layers disposed radially outside the tire crown region of the carcass 6. The pair of bead cores 5 includes a first bead core 51 located in a first half 11 and a second bead core 52 located in a second half 12.

[0030] The bead core 5 (first bead core 51 and second bead core 52, respectively) includes an annular cable bead extending circumferentially along the tire. The cross-sectional shape of the surface perpendicular to the extension direction of the bead core 5 (the cross-sectional shape in the tire width direction) is circular or approximately circular. However, the cross-sectional shape of the bead core 5 in the tire width direction can be any shape, such as a square or hexagon. For example, the cable bead is formed of high-carbon steel wire covered with rubber. A bead filler 8 formed of rubber material or the like is arranged on the radially outer side of the bead core 5. The bead filler 8 includes a first bead filler 81 located in the first half 11 and a second bead filler 82 located in the second half 12.

[0031] In the cross-section of tire 1 along its width, the first bead filler 81 is longer than the second bead filler 82 in the tire radial direction. More specifically, the length L1 of the first bead filler 81 in the tire radial direction is longer than the length L2 of the second bead filler 82 in the tire radial direction. Therefore, the rigidity of the first sidewall portion 31 in which the communication device 9 is embedded can be improved. On the other hand, by keeping the length of the second bead filler 82 in the second half 21 relatively short, any increase in the weight of tire 1 due to the embedding of the communication device 9 can be suppressed.

[0032] The tire carcass 6 includes one or more (one in this embodiment) ply layers extending annularly between a first bead core 51 and a second bead core 52. The ply layers are formed of a plurality of cords covered with rubber. In this embodiment, the cords forming the ply layers are, for example, organic fiber cords such as nylon cords. Therefore, compared to the case where the ply layers are formed of metal cords, the tire carcass 6 becomes less likely to interfere with the communication of the communication device 9. However, the cords forming the ply layers can be formed of any material and can be, for example, metal cords such as steel cords. In this embodiment, the cords are configured to extend in the tread portion 4 along the tire width direction. That is, the tire carcass 6 has a radial structure. The tire carcass 6 is fastened to a pair of bead cores 5.

[0033] Specifically, the tire carcass 6 includes a tire carcass body portion 6A, a first tire carcass fold-back portion 61B, and a second tire carcass fold-back portion 62B. The tire carcass body portion 6A extends annularly between the first bead core 51 and the second bead core 52. The first tire carcass fold-back portion 61B extends from the tire carcass body portion 6A, folds back around the periphery of the first bead core 51 from the inside in the tire width direction to the outside in the tire width direction, and extends radially outward from the tire. The second tire carcass fold-back portion 62B extends from the tire carcass body portion 6A, folds back around the periphery of the second bead core 52 from the inside in the tire width direction to the outside in the tire width direction, and extends radially outward from the tire.

[0034] In the cross-section of tire 1 along its width, the first tire carcass reversal portion 61B is longer than the second tire carcass reversal portion 62B in the tire radial direction. That is, the first end 61E of the first tire carcass reversal portion 61B on the outermost side of the tire radial direction is positioned further outward than the second end 62E of the second tire carcass reversal portion 62B on the outermost side of the tire radial direction.

[0035] The belt 7 is disposed radially outside the crown region of the tire carcass 6. The belt 7 is formed by one or more (two layers in this embodiment) belt layers stacked radially in the tire equatorial plane CL. For the tread portion 4, the belt 7 is arranged to cover the tire carcass 6 from the radially outside. The belt 7 extends through the first half 11 and the second half 12. In this specification, the belt layer with the longest length in the tire width direction among the one or more belt layers is also referred to as the "maximum width belt layer". The outer end 7E of the maximum width belt layer of the belt 7 in the tire width direction is also simply referred to as the outer end 7E of the belt 7 in the tire width direction. In this embodiment, among the two belt layers, the belt layer radially inside the tire is the maximum width belt layer. However, the maximum width belt layer is not necessarily the innermost belt layer in the tire radial direction. When the belt 7 is formed by one belt layer, the maximum width belt layer refers to that one belt layer.

[0036] The communication device 9 is arranged in the tire 1.

[0037] Communication device 9 performs wireless communication. Communication device 9 is, for example, an RF (Radio Frequency) tag. An RF tag can also be called an RFID (Radio Frequency Identification) tag. Communication device 9 includes an IC (Integrated Circuit) chip forming a controller and storage unit, and one or more antennas connected to the IC chip. The IC chip can store any information related to tire 1, such as tire 1's identification information and manufacturing date. For example, communication device 9 has two antennas extending in a straight line, wavy shape, or spiral shape. These two antennas are arranged to extend from the IC chip in opposite directions, and the device as a whole can have an elongated shape.

[0038] The IC chip can be operated by a dielectric electromotive force generated by electromagnetic waves received by one or more antennas. That is, the communication device 9 can be a passive communication device. Alternatively, the communication device 9 may also include a battery and be able to communicate by generating electromagnetic waves under its own power. That is, the communication device 9 can be an active communication device.

[0039] The communication device 9 is embedded in the first sidewall portion 31 of the first half 11. Specifically, the communication device 9 is embedded in the first sidewall portion 31 of the first half 11 in a manner that is radially inner to the tire than the first end 61E of the first tire carcass fold-back portion 61B and radially outer to the tire than the second end 62E of the second tire carcass fold-back portion 62B. Therefore, since the first tire carcass fold-back portion 61B extends radially outer to the tire than the location where the communication device 9 is embedded in the first sidewall portion 31 of the first half 11, the rigidity of the first sidewall portion 31 near the communication device 9 is increased. Therefore, for example, when a radial load is applied to the tire 1, any out-of-plane deformation in the first sidewall portion 31 in the tire width direction can be suppressed. Therefore, the durability of the communication device 9 embedded in the first sidewall portion 31 of the first half 11 is improved. At this time, the length of the second tire body turning-back portion 62B in the second half 12 without the communication device 9 is different from the length of the first tire body turning-back portion 61B. By keeping the length of the second tire body turning-back portion shorter, the increase in the weight of the tire 1 due to the installation of the communication device 9 can be suppressed.

[0040] Therefore, since the first carcass retraction portion 61B of the first half 11 extends radially outward from the tire, the cut resistance of the first half 11 is improved. This is also effective in improving the durability of the first half 11 located on the outer side of the vehicle mount, which is more likely to come into contact with obstacles such as curbs or small stones when the vehicle is in motion. Furthermore, by embedding the communication device 9 on the radially outward side of the tire at the second end 62E of the second carcass retraction portion 62B, the second carcass retraction portion 62B is not positioned on the inner side of the vehicle mount of the communication device 9 in the second half 12. Therefore, when the communication device 9 communicates with electronic devices located on the inner side of the vehicle mount of the tire 1, the second half 12 becomes less likely to interfere with the communication of the communication device 9. In this embodiment, the communication device 9 is described as being completely embedded in the tire 1. However, embedding the communication device 9 in the tire 1 may include at least a portion of the communication device 9 being embedded in the tire 1.

[0041] The first end 61E of the first tire carcass reversal portion 61B, located radially outward of the tire, is positioned radially inward of the tire width direction compared to the end 7E of the belt 7 in the first half 11, which is located radially outward of the tire body portion 6A and radially inward of the tire width direction compared to the belt 7. In other words, an envelope structure is employed in the first half 11 of the tire carcass 6. In this embodiment, the first end 61E of the first tire carcass reversal portion 61B is positioned radially outward of the tire body portion 6A and radially inward of the tire width direction compared to the belt 7. Therefore, since the first tire carcass reversal portion 61B extends through the entire first tire sidewall portion 31, the rigidity of the first tire sidewall portion 31 is increased compared to a configuration where the first tire carcass reversal portion 61B terminates midway in the first tire sidewall portion 31. Consequently, the durability of the communication device 9 embedded in the first tire sidewall portion 31 of the first half 11 is further improved.

[0042] The communication device 9 is embedded in the first sidewall portion 31 of the first half 11, which is located further outward in the tire width direction than the first tire body fold-back portion 61B. Therefore, when the communication device 9 communicates with electronic devices located on the vehicle mounting outside the tire 1, the tire body 6 does not interfere with the communication performance of the communication device 9, and the communication performance of the communication device 9 is improved.

[0043] However, the embedding position of the communication device 9 in the first sidewall portion 31 of the first half 11 is not limited to... Figure 1 The example shown. Figure 2 and Figure 3 A variant of tire 1 is shown, in which the location of the communication device 9 is changed. Figure 2 yes Figure 1 A cross-sectional view in the tire width direction of the first variant of tire 1 shown. Figure 3 yes Figure 1 A cross-sectional view in the tire width direction of the second variant of tire 1 shown.

[0044] For example, such as Figure 2 As shown, the communication device 9 can be embedded in the first sidewall portion 31 of the first half 11, which is located more inside the tire body portion 6A in the tire width direction. Normally, when a radial load is applied to the tire 1, the sidewall portion 3 bends outward in the tire width direction. At this time, in the sidewall portion 3, radial tensile deformation occurs near the outer side of the tire width direction, and radial compressive deformation occurs near the inner side of the tire width direction. Since the communication device 9 is particularly susceptible to damage when tensile strain is applied, by embedding the communication device 9 inside the tire body portion 6A in the tire width direction, the communication device 9 becomes less susceptible to damage when a radial load is applied to the tire 1.

[0045] Alternative locations, such as Figure 3 As shown, the communication device 9 can be embedded in the first sidewall portion 31 of the first half 11 in a manner that is further outward in the tire width direction than the tire body portion 6A and further inward in the tire width direction than the first tire body fold-back portion 61B. By covering the inner and outer sides of the communication device 9 in the tire width direction with the tire body portion 6A and the first tire body fold-back portion 61B respectively, the communication device 9 is less susceptible to damage from impacts from the outer or inner surface of the tire 1.

[0046] Refer again Figure 1 The communication device 9 is located in the first sidewall portion 31 of the first half 11, positioned radially outward of the tire, relative to the tire's maximum width W. Here, the "maximum tire width W" is the position where the tire 1 is at its longest length in the width direction when the tire 1 is in a reference state—that is, when the tire 1 is fitted to a suitable rim, inflated with a specified internal pressure, and without any applied load. Therefore, when the communication device 9 communicates with electronic devices located radially outward of the tire 1 (e.g., on the road surface), other parts of the tire 1 are less likely to interfere with the communication of the communication device 9. Thus, both the communication performance of the communication device 11 relative to the tire's radial direction and its communication performance relative to the tire's width direction can be achieved.

[0047] On the other hand, the communication device 9 can be located in the first sidewall portion 31 of the first half 11, positioned radially inside the tire at a location greater than the maximum width W of the tire. When the communication device 9 is embedded radially inside the tire at a location greater than the maximum width W of the tire, obstacles such as curbs or small stones become less likely to impact the outer surface of the embedded location of the communication device 9. Therefore, the communication device 9 is less susceptible to damage.

[0048] (Second Implementation)

[0049] The following is for reference Figure 4 The tire 1 according to the second embodiment of this disclosure is described. Figure 4 This is a cross-sectional view of the tire 1 taken along the tire width direction according to the second embodiment of the present disclosure.

[0050] like Figure 4 As shown, the position of the first end portion 61E on the radial outer side of the first tire carcass fold-back portion 61B in the second embodiment differs from that in the first embodiment. The second embodiment will be described below, focusing on the differences from the first embodiment. Parts having the same structure as in the first embodiment are referred to by the same reference numerals.

[0051] In the second embodiment, as in the first embodiment, in the cross-section of the tire 1 in the tire width direction, the first tire carcass reversal portion 61B is longer than the second tire carcass reversal portion 62B in the tire radial direction. More specifically, the first end portion 61E of the first tire carcass reversal portion 61B on the outermost side of the tire radial direction is positioned further outward than the second end portion 62E of the second tire carcass reversal portion 62B on the outermost side of the tire radial direction. Furthermore, the communication device 9 is embedded in the first sidewall portion 31 of the first half 11.

[0052] In this embodiment, the first end 61E of the first tire carcass fold-back portion 61B, located radially outward, is positioned further outward in the tire width direction than the end 7E of the belt 7 in the first half 11, which is located radially outward of the tire width direction. That is, the first tire sidewall portion 31 includes an inner portion 31A and an outer portion 31B in the tire radial direction. The first tire carcass fold-back portion 61B of the tire carcass 6 is disposed in the inner portion 31A, while it is not disposed in the outer portion 31B. Because the first tire carcass fold-back portion 61B is disposed in the inner portion 31A of the first tire sidewall portion 31, the rigidity of the inner portion 31A of the first tire sidewall portion 31 is higher than that of the outer portion 31B. Therefore, for example, when a radial load is applied to the tire 1, due to the rigidity difference between the inner portion 31A and the outer portion 31B of the first tire sidewall portion 31, the outer portion 31B of the first tire sidewall portion 31 is more prone to bending, while the inner portion 31A is less prone to bending. Therefore, any out-of-plane deformation in the inner portion 31A of the first sidewall 31 with respect to the tire width direction is suppressed. Thus, by embedding the communication device 9 in the inner portion 31A of the first sidewall 31 where the first carcass retraction portion 61B is located, the communication device 9 becomes less susceptible to damage. In the illustrated example, the first end 61E of the first carcass retraction portion 61B on the radially outer side of the tire is located near the position of the tire's maximum width W. However, the first end 61E of the first carcass retraction portion 61B on the radially outer side of the tire can be located anywhere radially outward of the tire width direction than the second end 62E of the second carcass retraction portion 62B.

[0053] In this embodiment, the communication device 9 is embedded on the outer side of the first tire body fold-back portion 61B in the tire width direction of the tire body 6. However, as in the first embodiment, the communication device 9 can be embedded in the first sidewall portion 31 of the first half 11 in a manner that is more inward in the tire width direction than the tire body portion 6A. Alternatively, the communication device 9 can be embedded in the first sidewall portion 31 of the first half 11 in a manner that is more inward in the tire width direction than the tire body portion 6A and more inward in the tire width direction than the first tire body fold-back portion 61B.

[0054] In this embodiment, the communication device 9 is located in the first sidewall portion 31 of the first half 11 at a position radially inward of the tire than the maximum tire width W. However, as in the first embodiment, the communication device 9 may be located in the first sidewall portion 31 of the first half 11 at a position radially outward of the tire than the maximum tire width W.

[0055] As described above, the tire 1 according to various embodiments of the present disclosure includes a first half 11 on the outer side of the vehicle mounting relative to the tire equatorial plane CL and a second half 12 on the inner side of the vehicle mounting, and includes a tire body 6 extending between a first bead core 51 located in the first half 11 and a second bead core 52 located in the second half 12. The tire body 6 includes a tire body portion 6A extending annularly between the first bead core 51 and the second bead core 52, a first tire body fold-back portion 61B extending from the tire body portion 6A, folding back around the periphery of the first bead core 51 from the inner side in the tire width direction to the outer side in the tire width direction, and extending radially outward of the tire, and a second tire body fold-back portion 62B extending from the tire body portion 6A, folding back around the periphery of the second bead core 52 from the inner side in the tire width direction to the outer side in the tire width direction, and extending radially outward of the tire. The first radially outward end 61E of the first tire body fold-back portion 61B is positioned radially outward of the tire than the second radially outward end 62E of the second tire body fold-back portion 62B. The communication device 9 is embedded in the sidewall portion 31 of the first half 11 in a manner that is closer to the radial inside of the tire than the first end 61E and closer to the radial outside of the tire than the second end 62E. This configuration can improve the durability of the communication device 9 arranged in the first sidewall portion 31 of the first half 11, while suppressing the increase in the weight of the tire 1 by keeping the length of the second tire body fold-back portion 62B in the second half 12 relatively short.

[0056] The tire 1 according to various embodiments of this disclosure further includes a belt 7 disposed radially outward of the crown region of the tire carcass 6, and the first end 61E of the first tire carcass fold-back portion 61B is preferably positioned inward in the tire width direction than the end 7E of the belt 7 in the first half 11 that is outward in the tire width direction. Compared to a configuration where the first tire carcass fold-back portion 61B terminates midway in the first tire sidewall portion 31, this configuration increases the rigidity of the first tire sidewall portion 31 of the first half 11. Therefore, the durability of the communication device 9 embedded in the first tire sidewall portion 31 of the first half 11 is further improved.

[0057] The tire 1 according to various embodiments of this disclosure further includes a belt 7 arranged radially outward of the tire body portion 6A, and the first end 61E of the first tire body fold-back portion 61B is preferably positioned further outward in the tire width direction than the end 7E of the belt 7 in the first half 11 that is outward in the tire width direction. When a radial load is applied to the tire, this configuration suppresses any out-of-plane deformation of the inner portion 31A of the first sidewall portion 31 of the first half 11, where the first tire body fold-back portion 61B is disposed, in the tire width direction. Therefore, the communication device 9 embedded in the first sidewall portion 31 of the first half 11 becomes less susceptible to damage.

[0058] In the tire 1 according to various embodiments of the present disclosure, the communication device 9 is preferably embedded in the first sidewall portion 31 of the first half 11, located further outward in the tire width direction than the first tire body fold-back portion 61B. This configuration improves the communication performance of the communication device 9 when it communicates with electronic devices located on the vehicle-mounted outer side of the tire 1.

[0059] In the tire 1 according to the first embodiment of this disclosure, the communication device 9 is preferably embedded in the first sidewall portion 31 of the first half 11 in a manner that is closer to the inside of the tire body portion 6A in the tire width direction. This configuration makes the communication device 9 less susceptible to damage when a radial load is applied to the tire 1.

[0060] In the tire 1 according to the first embodiment of this disclosure, the communication device 9 is preferably embedded in the first sidewall portion 31 of the first half 11 in a manner that is located further outward in the tire width direction than the tire body portion 6A and further inward in the tire width direction than the first tire body fold-back portion 61B. This configuration makes the communication device 9 less susceptible to damage from impacts from the outer or inner surface of the tire 1.

[0061] Note that although the tire according to this disclosure has been described based on the accompanying drawings and embodiments, those skilled in the art can make various modifications and adjustments based on this disclosure. Therefore, these modifications and adjustments are included within the scope of this disclosure. For example, the constructions, functions, etc. included in the various embodiments can be reconfigured in a logically consistent manner. The constructions, functions, etc. included in the various embodiments can be used in combination with other embodiments, and multiple constructions, functions, etc. can be combined into one, divided, or partially omitted.

[0062] Explanation of reference numerals in the attached figures

[0063] 1: Tire, 11: First half, 12: Second half, 2: Bead portion, 21: First bead portion; 22: Second bead portion, 3: Sidewall portion, 31: First sidewall portion, 32: Second sidewall portion, 4: Tread portion, 5: Bead core, 51: First bead core, 52: Second bead core, 6: Carcass, 6A: Carcass body portion, 61B: First carcass fold-back portion, 62B: Second carcass fold-back portion, 61E: End of first carcass fold-back portion, 62E: End of second carcass fold-back portion; 7: Belt, 7E: End of belt, 8: Bead filler, 81B: First bead filler, 82B: Second bead filler, 9: Communication device, CL: Tire equatorial surface, W: Maximum tire width, L1: Length of first bead filler, L2: Length of second bead filler.

Claims

1. A tire comprising a first half on the vehicle-mounted outer side and a second half on the vehicle-mounted inner side relative to the tire equatorial plane, the tire comprising: The tire carcass extends between a first bead core located in the first half and a second bead core located in the second half. The fetal body includes: The tire body extends in a ring shape between the first bead core and the second bead core; The first tire carcass fold-back portion extends from the tire carcass body portion, folds back around the periphery of the first tire bead core from the inner side in the tire width direction to the outer side in the tire width direction, and extends radially outward towards the tire; and The second tire carcass fold-back portion extends from the tire carcass body portion, folds back around the periphery of the second tire bead core from the inside in the tire width direction to the outside in the tire width direction, and extends radially outward from the tire. Specifically, the first end of the first tire carcass fold-back portion is positioned further outward than the second end of the second tire carcass fold-back portion. A communication device is embedded in the sidewall portion of the first half of the tire in a manner that is closer to the radial inside of the tire than the first end and closer to the radial outside of the tire than the second end. The communication device is located in the sidewall of the first half of the tire, radially outward from the tire's maximum width.

2. The tire according to claim 1, further comprising a belt disposed radially outside the crown region of the tire carcass. in, The first end of the first tire body fold-back portion is positioned inside the tire width direction than the end of the belt in the first half that is outside the tire width direction.

3. The tire according to claim 1, further comprising a belt disposed radially outward of the tire body portion. in, The first end of the first tire body fold-back portion is positioned further outward in the tire width direction than the end of the belt in the first half that is further outward in the tire width direction.

4. The tire according to any one of claims 1 to 3, wherein, The communication device is embedded in the sidewall portion of the first half of the tire in a manner that is further outward in the tire width direction than the first tire body fold-back portion.

5. The tire according to any one of claims 1 to 3, wherein, The communication device is embedded in the sidewall portion of the first half of the tire in a manner that is more inward in the tire width direction than the tire body portion.

6. The tire according to any one of claims 1 to 3, wherein, The communication device is embedded in the sidewall portion of the first half of the tire in a manner that is further outward in the tire width direction than the tire body portion and further inward in the tire width direction than the first tire body fold-back portion.

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