Storage unit with functional components and tires

Abstract

The present invention provides a housing with functional components and a tire that enhances the restraining force of the functional components to prevent them from falling off, facilitates the housing of the functional components, and improves the durability of both the housing and the functional components. [Solution] The housing 10 has a base 11 fixed to the inner surface of the tire, an upper part 15 located on the opposite side of the base 11 and in contact with the upper surface 21 of the functional component 20, a side wall 12 connecting the base 11 to the upper part 15, and at least one opening 14 surrounded by the base 11, the upper part 15 and the side wall 12, the relationship between the upper area T1 of the housing 10 and the upper area T2 of the functional component 20 being 0.3 ≤ T1 / T2 ≤ 1.0, the relationship between the maximum area S1 of the opening 14 and the minimum area S2 of the functional component 20 being 0.2 ≤ S1 / S2 ≤ 0.8, and the modulus M of the material constituting the housing 10 when stretched to 100% 100 [MPa] is 0.5≦M 100 The value is ≤7.0.

Description

[Technical Field]

[0001] The present invention relates to a housing with functional components and a tire, and more particularly to a housing with functional components and a tire that enhances the restraining force of the functional components to prevent them from falling out, facilitates the housing of the functional components, and improves the durability of both the housing and the functional components. [Background technology]

[0002] Functional components (e.g., sensor units including sensors) are installed on the inner surface of tires to acquire tire information (see, for example, Patent Documents 1 and 2). When installing functional components, a container made of rubber or the like is attached to the inner surface of the tire, and the functional components are housed inside the attached container.

[0003] In such containers with functional components, there is a possibility that the functional components may detach from the container if a large impact is transmitted to the tires when driving over bumps or other uneven surfaces in the road. In particular, the risk of functional components detaching is higher in containers that have an opening at the top and are configured to allow the functional components to be inserted and removed through this opening. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Patent No. 6272225 [Patent Document 2] Special Publication No. 2016-505438 [Overview of the project] [Problems that the invention aims to solve]

[0005] The object of the present invention is to provide a housing with functional components and a tire that enhances the restraining force of functional components to prevent them from falling out, facilitates the housing of functional components, and improves the durability of both the housing and the functional components. [Means for solving the problem]

[0006] To achieve the above objective, the present invention provides a housing with a functional component, comprising a housing that houses a functional component having a sensor function for detecting tire information, wherein the housing has a base fixed to the inner surface of the tire, an upper part located on the opposite side of the base and in contact with the upper surface of the functional component, a side wall connecting the base to the upper part, and at least one opening surrounded by the base, the upper part and the side wall, wherein the upper area T1 of the housing and the upper area T2 of the functional component satisfy the relationship 0.3 ≤ T1 / T2 ≤ 1.0, the maximum area S1 of the opening and the minimum area S2 of the functional component satisfy the relationship 0.2 ≤ S1 / S2 ≤ 0.8, and the modulus M of the material constituting the housing when stretched to 100% 100 [MPa] is 0.5 ≤ M 100 It is characterized by being ≤ 7.0.

[0007] Furthermore, the tire of the present invention is characterized in that the housing with the above-mentioned functional components is fixed to the back surface of the tread portion via an adhesive layer, and the functional components are housed in the housing. [Effects of the Invention]

[0008] In this invention, the relationship between the upper area T1 of the housing and the upper area T2 of the functional component is 0.3 ≤ T1 / T2 ≤ 1.0, so the upper part of the housing sufficiently covers the upper surface of the functional component, preventing the functional component from falling out of the housing even when subjected to a large impact from the road surface. Furthermore, the relationship between the maximum area S1 of the opening and the minimum area S2 of the functional component is 0.2 ≤ S1 / S2 ≤ 0.8, so the dimensions of the opening are set smaller than the dimensions of the functional component, preventing the functional component from being ejected from the opening even if the housing deforms due to a large impact from the road surface. In addition, the modulus M of the material constituting the housing when stretched to 100% 100 [MPa] is 0.5 ≤ M 100A value of ≤7.0 allows the housing to be flexible, enabling it to absorb shocks from the road surface, increasing the durability of the housing and its functional components, while also allowing functional components to be easily inserted into and removed from the housing through the opening.

[0009] In the functional component housing of the present invention, when the functional component is not housed in the housing, it is preferable that the relationship between the inner circumference Aw of the housing at the center of the housing's height Ah and the outer circumference Bw of the functional component at the center of the functional component's height Bh satisfies 0.6 ≤ Aw / Bw < 1.0, and the relationship between the housing's height Ah and the functional component's height Bh satisfies 0.50 ≤ Ah / Bh ≤ 0.95, and that when the functional component is housed in the housing, the functional component and the inner wall of the housing are in close contact. This allows the housing to hold the functional component while compressing and tightly contacting its top and side surfaces, effectively preventing the functional component from falling out due to impacts transmitted to the housing from the road surface.

[0010] It is preferable that the relationship between the upper area T1 of the housing and the upper area T2 of the functional component satisfies 0.5 ≤ T1 / T2 ≤ 0.9. This effectively prevents the functional component from falling out due to impacts transmitted from the road surface to the housing. Furthermore, it makes the process of housing the functional component through the opening even easier.

[0011] Modulus M of the materials constituting the containment when stretched to 100% 100 [MPa] is 1.0 ≤ M 100 It is preferable that the value be ≤4.0. This makes it possible to achieve both increased restraint force on the functional components by the housing and easy storage of the functional components.

[0012] It is preferable that the elongation at break EB of the material constituting the housing is in the range of 100% to 900%. This prevents damage to the housing even when the opening widens when housing functional components.

[0013] The container is preferably made of vulcanized rubber. Even when such a container is used, the above-described excellent effects can be obtained.

[0014] In addition, the functional component preferably has a sensor function using a piezoelectric element as a sensor element. When a functional component having a sensor function using such a piezoelectric element is used, remarkable effects can be obtained.

[0015] The tire of the present invention is preferably a pneumatic tire, but may also be a non-pneumatic tire. In the case of a pneumatic tire, it can be filled with an inert gas such as air or nitrogen, or other gases inside.

[0016] In the present invention, the modulus M at 100% elongation of the material constituting the container 100 is measured by a tensile test at 23°C in accordance with JIS K6251 (using a No. 3 dumbbell) and represents the tensile stress at 100% elongation.

Brief Description of the Drawings

[0017] [Figure 1] It is a perspective view showing an example of a container with a functional component according to an embodiment of the present invention. [Figure 2] It is a perspective view showing a state where the functional component is housed in the container with a functional component of FIG. 1. [Figure 3] It is a plan view showing the container with a functional component of FIG. 1. [Figure 4] It is a cross-sectional view showing the container with a functional component of FIG. 1. [Figure 5] (a) and (b) are explanatory views showing modified examples of the functional component that can be housed in the container with a functional component according to an embodiment of the present invention. [Figure 6] (a) to (d) are explanatory views showing modified examples of the container with a functional component according to an embodiment of the present invention. [Figure 7] It is a meridian cross-sectional view showing an example of a pneumatic tire according to an embodiment of the present invention.

Mode for Carrying Out the Invention

[0018] Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings. FIGS. 1 to 4 show a container with functional components according to an embodiment of the present invention.

[0019] As shown in FIGS. 1 to 4, the functional component 20 is housed inside the container 10. The container 10 includes a flat base 11 fixed to the inner surface of the tire, an upper part 15 located on the opposite side of the base 11 and in contact with the upper surface 21 of the functional component 20, a side wall part 12 connecting the base 11 to the upper part 15, a housing part 13 which is an internal space formed by the base 11, the upper part 15 and the side wall part 12, and at least one opening part 14 communicating with the housing part 13. Such a container 10 is preferably a molded body made of vulcanized rubber. In this embodiment, three opening parts 14 are formed on the side part of the container 10, and these are arranged at equal intervals in the circumferential direction.

[0020] The functional component 20 has a structure in which various electronic components are housed inside a housing. The electronic components can be configured to include various sensors for acquiring tire information, a transmitter, a receiver, a control circuit, a battery, and the like. Examples of the tire information acquired by the sensors include the internal temperature and internal pressure of an inflated tire, the wear amount of the tread part, and the like. For example, a temperature sensor and a pressure sensor are used to measure the internal temperature and internal pressure. When detecting the wear amount of the tread part, for example, a sensor element made of a piezoelectric element is disposed on the contact surface on the inner surface side of the tire of the functional component 20, and the sensor element detects an output voltage corresponding to the deformation of the tire during running, and the wear amount of the tread part 1 is detected based on the output voltage. In addition, an acceleration sensor or a magnetic sensor can also be used.

[0021] In the above container with functional components, the upper area T1 [mm 2 of the container 10 and the upper area T2 [mm 2The configuration satisfies the relationship 0.3 ≤ T1 / T2 ≤ 1.0. In particular, it is desirable that the relationship 0.5 ≤ T1 / T2 ≤ 0.9 is satisfied. Here, the upper area T1 of the housing 10 is the maximum area in contact between the upper part 15 of the housing 10 and the upper surface 21 of the functional component 20, and in this embodiment, it is the area of ​​the shaded area shown in Figure 3. The upper area T2 of the functional component 20 is the area of ​​the upper surface 21 of the functional component 20 in a plan view, and in this embodiment, it is the area of ​​the dashed circle shown in Figure 3.

[0022] Also, the maximum area S1 [mm²] of the opening 14. 2 ] and the minimum area S2 [mm²] of the functional component 20 2 The configuration satisfies the relationship 0.2 ≤ S1 / S2 ≤ 0.8. In particular, it is desirable that the relationship 0.3 ≤ S1 / S2 ≤ 0.5 be satisfied. Here, the maximum area S1 of the opening 14 is the area measured when viewed from a direction parallel to the base 11, and in this embodiment it is the area of ​​the dashed rectangle shown in Figure 1. However, if there are multiple openings 14, the maximum area S1 is the largest of the areas of those openings 14. The thickness of the base 11 and the upper part 15 are not included in this maximum area S1 of the opening 14. The minimum area S2 of the functional component 20 is the area of ​​the cross-section passing through the central axis of the functional component 20. For example, if the functional component 20 is a rectangular prism, the minimum area S2 is the area of ​​the cross-section passing through the central axis of the functional component 20 and parallel to the plane formed by the pair of short sides.

[0023] Furthermore, the material constituting the housing 10 has a modulus M when stretched to 100%. 100 [MPa] is 0.5 ≤ M 100 It is set to the range ≤7.0. In particular, 1.0 ≤ M 100 It is desirable to set it within the range of ≤4.0.

[0024] In the above-described housing with functional components, the relationship between the upper area T1 of the housing 10 and the upper area T2 of the functional component 20 is 0.3 ≤ T1 / T2 ≤ 1.0, so the upper part 15 of the housing 10 sufficiently covers the upper surface 21 of the functional component 20, thus preventing the functional component 20 from falling out of the housing 10 even when subjected to a large impact from the road surface. Furthermore, the relationship between the maximum area S1 of the opening 14 and the minimum area S2 of the functional component 20 is 0.2 ≤ S1 / S2 ≤ 0.8, so the dimensions of the opening 14 are set smaller than the dimensions of the functional component 20, thus preventing the functional component 20 from being ejected from the opening 14 even when the housing 10 deforms due to a large impact from the road surface. In addition, the modulus M of the material constituting the housing 10 when stretched to 100% 100 0.5≦M 100 The ≤7.0 value provides flexibility to the housing 10, allowing it to absorb shocks from the road surface, thereby increasing the durability of the housing 10 and the functional components 20, and also allowing the functional components 20 to be easily inserted into and removed from the housing 10 through the opening 14.

[0025] Here, if the ratio T1 / T2 is less than 0.3, the restraining force of the upper part 15 of the housing 10 decreases, and the effect of preventing the functional component 20 from falling off due to impact from the road surface tends not to be sufficiently obtained. Also, if the ratio S1 / S2 is less than 0.2, the opening 14 is too small, making it difficult to insert and remove the functional component 20 from the housing 10, and the opening 14 may widen to an unacceptable extent when housing the functional component 20, potentially damaging the housing 10. On the other hand, if the ratio S1 / S2 is greater than 0.8, the side wall portion 12 is too small (the opening 14 is too large), reducing the holding area for the functional component 20, and the restraining force of the housing 10 on the functional component 20 decreases, making the functional component 20 more likely to fall off.

[0026] In the above-described housing with functional components, when the housing 10 does not house the functional components 20, it is preferable that the inner circumference Aw [mm] of the housing 10 at the center of the height Ah of the housing 10 and the outer circumference Bw [mm] of the functional components 20 at the center of the height Bh of the functional components 20 satisfy the relationship 0.6 ≤ Aw / Bw < 1.0, and more preferably 0.7 ≤ Aw / Bw ≤ 0.9. As a result, the inner circumference Aw of the housing 10 is set to be smaller than the outer circumference Bw of the functional components 20, making it easier for the functional components 20 and the inner wall of the housing 10 to be in close contact. Furthermore, when the housing 10 does not house the functional components 20, it is preferable that the height Ah [mm] of the housing 10 and the height Bh [mm] of the functional components 20 satisfy the relationship 0.50 ≤ Ah / Bh ≤ 0.95, and more preferably 0.70 ≤ Ah / Bh ≤ 0.90. As a result, the height Ah of the housing 10 is set to be smaller than the height Bh of the functional component 20, making it easier for the functional component 20 to come into close contact with the inner wall of the housing 10. Furthermore, it is desirable that the functional component 20 and the inner wall of the housing 10 come into close contact with each other when the functional component 20 is housed in the housing 10.

[0027] The height Ah of the housing 10 (see Figure 4) is the height from the inner surface of the base 11 to the inner surface of the upper part 15 when the functional component 20 is not housed in the housing 10. The inner circumference Aw of the housing 10 is the circumference of the inner wall surface of the housing 10 measured at the center position of height Ah (0.5 × Ah) when the functional component 20 is not housed in the housing 10. The height Bh of the functional component 20 (see Figure 4) is the height from the bottom surface to the top surface 21 of the functional component 20 when the functional component 20 is not housed in the housing 10. The outer circumference Bw of the functional component 20 is the circumference of the outer wall surface of the functional component 20 measured at the center position of height Bh (0.5 × Bh) when the functional component 20 is not housed in the housing 10. Furthermore, as shown in Figures 5(a) and (b), if a projection 22 is formed on the top surface 21 of the functional component 20, the height Bh of the functional component 20 is the height excluding the projection 22. In Figures 5(a) and 5(b), the upper surface 21 of the functional component 20 does not include the protrusion 22 and represents the flat surface indicated by the diagonal lines. The shape of the upper part 15 of the housing 10 can be appropriately changed so that it contacts the upper surface 21 of such functional component 20 when it is housed.

[0028] By setting both the ratio Aw / Bw and the ratio Ah / Bh appropriately in this way, the housing 10 can hold the functional component 20 in close contact with the upper surface 21 and sides of the functional component 20 by pressing against them, effectively preventing the functional component 20 from falling out due to impacts transmitted from the road surface to the housing 10. Here, if the ratio Aw / Bw and the ratio Ah / Bh are above the lower limit of their respective ranges, it becomes easier to insert the functional component 20 into the housing 10, while if they are below the upper limit of their respective ranges, the restraining force of the housing 10 on the functional component 20 increases, which is effective in preventing the functional component 20 from falling out.

[0029] Furthermore, by reducing the circumference ratio of the upper side of the functional component 20, the pressure in the direction of the base 11 increases, the restraining force increases, and the effect of preventing the functional component 20 from falling off is improved. In addition, the contact state between the functional component 20 and the base 11 is stabilized, and the input sensitivity (sensing stability) when the tire makes contact with the ground is improved. On the other hand, by reducing the circumference ratio of the lower side of the functional component 20, the increased sensing stability caused by excessive pressure in the direction of the base 11 can be suppressed.

[0030] Furthermore, in the above-mentioned housing with functional components, it is preferable that the elongation at break EB of the material constituting the housing 10 is in the range of 100% to 900%. This prevents the housing 10 from being damaged even if the opening 14 widens when housing the functional components 20. The elongation at break EB is measured in accordance with JIS K6251.

[0031] In the present invention, the shape of the upper part 15 of the housing 10 and the shape of the upper surface 21 of the functional component 20 are not particularly limited. The shape of the upper part 15 of the housing 10 can be appropriately changed according to any shape of the upper surface 21 of the functional component 20. For example, as shown in Figure 6(a), when a projection 22 (knob) is formed on the upper surface 21 of the functional component 20, a hole 16 is formed on the upper part 15 of the housing 10 at a position corresponding to the projection 22; as shown in Figure 6(b), when a projection 22 is formed on the upper surface 21 of the functional component 20, a lid 17 is formed on the upper part 15 of the housing 10 so as to cover the projection 22; as shown in Figure 6(c), the upper part 15 of the housing 10 does not cover the central part of the functional component 20; and as shown in Figure 6(d), a hole 16 is formed in the central part of the upper part 15 of the housing 10.

[0032] Figure 7 shows a pneumatic tire in which a housing with functional components is fixed to the inner surface of the tire. As shown in Figure 7, the pneumatic tire comprises a tread portion 1 that extends in the circumferential direction of the tire and forms an annular shape, a pair of sidewall portions 2, 2 arranged on both sides of the tread portion 1, and a pair of bead portions 3, 3 arranged radially inward of these sidewall portions 2.

[0033] A carcass layer 4 is mounted between a pair of bead sections 3, 3. This carcass layer 4 includes multiple reinforcing cords extending in the radial direction of the tire, which are folded back from the inside to the outside of the tire around the bead core 5 located in each bead section 3. A bead filler 6 made of a rubber composition with a triangular cross-section is placed on the outer circumference of the bead core 5.

[0034] On the other hand, multiple belt layers 7 are embedded on the outer circumference of the carcass layer 4 in the tread portion 1. These belt layers 7 include multiple reinforcing cords that are inclined with respect to the tire circumferential direction, and the reinforcing cords are arranged to intersect each other between layers. In the belt layers 7, the inclination angle of the reinforcing cords with respect to the tire circumferential direction is set to, for example, a range of 10° to 40°. Steel cords are preferably used as the reinforcing cords of the belt layers 7. On the outer circumference of the belt layers 7, at least one belt cover layer 8 is arranged, in which the reinforcing cords are arranged at an angle of, for example, 5° or less with respect to the tire circumferential direction, for the purpose of improving high-speed durability. Organic fiber cords such as nylon or aramid are preferably used as the reinforcing cords of the belt cover layer 8.

[0035] The tire internal structure described above is a typical example of a pneumatic tire, but is not limited to this example.

[0036] In the above-described pneumatic tire, a housing 10 containing a functional component 20 having a sensor function for detecting tire information is installed on the back surface of the tread portion 1. Such a housing with a functional component can be fixed to the back surface of the tire tread portion 1 via an adhesive layer (for example, adhesive or double-sided adhesive tape). [Examples]

[0037] Examples 1 to 21 were manufactured in which a functional component housing was provided for a functional component having a sensor function for detecting tire information, with a tire size of 185 / 65R15, the housing having a base, an upper part, three side walls, and three openings, the housing was fixed to the back surface of the tread portion via an adhesive layer, and the functional component was housed in the housing.

[0038] For comparison, Comparative Examples 1 to 5 were prepared, each having the same tire structure as Example 1 except for differences in the structure of the housing, the dimensional relationship between the housing and the functional components, or the physical properties of the housing. Specifically, Comparative Example 1 differs from Example 1 mainly in that one opening is formed at the top of the housing. Comparative Example 2 differs from Example 1 in that one opening is formed on the side of the housing. Comparative Examples 3 to 5 are the same as Example 1 in that three openings are formed on the side of the housing, but they differ from Example 1 in the dimensional relationship between the housing and the functional components or in the physical properties of the housing.

[0039] In the tires of Comparative Examples 1-5 and Examples 1-21, the position of the opening (number of openings), ratio T1 / T2, ratio S1 / S2, M 100 The ratios Aw / Bw, Ah / Bh, and elongation at break EB were set as shown in Tables 1 and 2.

[0040] These test tires were evaluated for their resistance to detachment, ease of installation, and durability using the test methods described below, and the results are shown in Tables 1 and 2.

[0041] Shedding resistance: Each test tire was mounted on a 15×5.5 rim wheel, and the air pressure was set to 350kPa. Then, using a 1707mm diameter drum testing machine with three protrusions on the drum surface, the ambient temperature was controlled to room temperature, and a load of 88% of the maximum load capacity was applied. The drum was then driven at a speed of 60km / h for a distance of 4000km. After the run, the displacement [mm] from the marking position before the run (initial position of the functional components inside the housing) was measured. The evaluation results were shown as an index using the reciprocal of the measured value, with the measured value of Comparative Example 1 set to 100. A larger index value indicates better resistance to detachment.

[0042] Installation: For each test tire's housing with functional components, the process of inserting the functional components into the housing was repeated 10 times, the time required for each insertion was measured, and the average of the 10 times was calculated. The evaluation results were shown as an index using the reciprocal of the calculated value, with the calculated value for Comparative Example 1 set to 100. A higher index value indicates better ease of installation.

[0043] Durability: Each test tire was mounted on a 15 x 5.5 rim wheel, and a high-speed durability test was conducted on a drum testing machine under a load of 80% of its maximum load capacity and an air pressure of 280 kPa. Specifically, the initial speed was set to 0 km / h, and the speed was increased by 10 km / h every 10 minutes until the speed reached 210 km / h. After the run, the appearance of the housing and functional parts was visually inspected, and the number of locations of damage (cracks, deformation, etc.) was measured. The evaluation results were shown as an index using the reciprocal of the measured value, with the measured value of Comparative Example 1 set to 100. A higher index value indicates better durability.

[0044] [Table 1]

[0045] [Table 2]

[0046] As can be seen from Tables 1 and 2, the pneumatic tires of Examples 1 to 21 showed a well-balanced improvement in resistance to detachment, ease of installation, and durability compared to Comparative Example 1.

[0047] In Comparative Example 2, the modulus M of the containment 100In Comparative Example 3, the modulus M of the housing was set significantly higher than the specified value of the present invention, resulting in poor installation. In Comparative Example 4, the ratio S1 / S2 was set higher than the specified value of the present invention, resulting in poor improvement in detachment resistance. In Comparative Example 5, the modulus M of the housing 100 Because the value was set lower than the specified value of the present invention, the improvement effect on resistance to shedding, in particular, could not be sufficiently obtained.

[0048] This disclosure encompasses the following inventions[1] to [8]. Invention [1] relates to a housing with a functional component, the housing having a sensor function for detecting tire information, wherein the housing has a base fixed to the inner surface of the tire, an upper part located on the opposite side of the base and in contact with the upper surface of the functional component, a side wall connecting the base to the upper part, and at least one opening surrounded by the base, the upper part and the side wall, wherein the upper area T1 of the housing and the upper area T2 of the functional component satisfy the relationship 0.3 ≤ T1 / T2 ≤ 1.0, the maximum area S1 of the opening and the minimum area S2 of the functional component satisfy the relationship 0.2 ≤ S1 / S2 ≤ 0.8, and the modulus M of the material constituting the housing when stretched to 100% 100 [MPa] is 0.5 ≤ M 100 This is a housing with functional components characterized by having a value of ≤7.0. Invention [2] is a housing with a functional component according to Invention [1], characterized in that, when the functional component is not housed in the housing, the inner circumference Aw of the housing at the center of the height Ah of the housing and the outer circumference Bw of the functional component at the center of the height Bh of the functional component satisfy the relationship 0.6 ≤ Aw / Bw < 1.0, and the height Ah of the housing and the height Bh of the functional component satisfy the relationship 0.50 ≤ Ah / Bh ≤ 0.95, and when the functional component is housed in the housing, the functional component and the inner wall of the housing are in close contact. Invention [3] is a housing with a functional component according to Invention [1] or [2], characterized in that the upper area T1 of the housing and the upper area T2 of the functional component satisfy the relationship 0.5 ≤ T1 / T2 ≤ 0.9. The invention [4] relates to the modulus M of the material constituting the housing when it is stretched to 100%. 100 [MPa] is 1.0 ≤ M 100 The invention is characterized by having a functional component housing as described in any of [1] to [3], wherein the value is ≤4.0. Invention [5] is a housing with a functional component according to any one of Inventions [1] to [4], characterized in that the elongation EB at break of the material constituting the housing is in the range of 100% to 900%. Invention [6] is a functional component housing according to any one of Inventions [1] to [5], characterized in that the housing is made of vulcanized rubber. Invention [7] is a housing with a functional component according to any one of Inventions [1] to [6], characterized in that the functional component has a sensor function using a piezoelectric element as a sensor element. Invention [8] is a tire characterized in that a housing with a functional component described in any of Inventions [1] to [7] is fixed to the back surface of the tread portion via an adhesive layer, and the functional component is housed in the housing. [Explanation of Symbols]

[0049] 1. Tread section 2 Sidewall section 3. Bead section 10 containment units 11 Base 12 Side wall section 13. Detention Unit 14 Opening 15 Top 20 Functional Parts 21 Top side

Claims

1. In a housing with a functional component, which includes a housing that contains a functional component having a sensor function for detecting tire information, The housing has a base fixed to the inner surface of the tire, an upper part located on the opposite side of the base and in contact with the upper surface of the functional component, a side wall connecting the base to the upper part, and at least one opening surrounded by the base, the upper part and the side wall. The upper area T1 of the housing and the upper area T2 of the functional component satisfy the relationship 0.3 ≤ T1 / T2 ≤ 1.

0. The maximum area S1 of the opening and the minimum area S2 of the functional component satisfy the relationship 0.2 ≤ S1 / S2 ≤ 0.

8. The modulus M of the material constituting the aforementioned housing when stretched to 100% 100 [MPa] is 0.5 ≤ M 100 A housing with functional components characterized by having a value of ≤7.

0.

2. The functional component housing according to claim 1, characterized in that, when the functional component is not housed in the housing, the inner circumference Aw of the housing at the center of the height Ah of the housing and the outer circumference Bw of the functional component at the center of the height Bh of the functional component satisfy the relationship 0.6 ≤ Aw / Bw < 1.0, and the height Ah of the housing and the height Bh of the functional component satisfy the relationship 0.50 ≤ Ah / Bh ≤ 0.95, and when the functional component is housed in the housing, the functional component and the inner wall of the housing are in close contact.

3. The housing with a functional component according to claim 1, characterized in that the upper area T1 of the housing and the upper area T2 of the functional component satisfy the relationship 0.5 ≤ T1 / T2 ≤ 0.

9.

4. The modulus M of the material constituting the aforementioned housing when stretched to 100% 100 [MPa] is 1.0 ≤ M 100 The functional component housing according to claim 1, characterized in that the value is ≤ 4.

0.

5. The functional component housing according to claim 1, characterized in that the elongation EB at break of the material constituting the housing is in the range of 100% to 900%.

6. The housing with a functional component according to claim 1, characterized in that the housing is made of vulcanized rubber.

7. The housing with the functional component according to claim 1, characterized in that the functional component has a sensor function using a piezoelectric element as a sensor element.

8. A tire characterized in that a housing with a functional component according to any one of claims 1 to 7 is fixed to the back surface of the tread portion via an adhesive layer, and the functional component is housed in the housing.

Images