Housing body with attached functional component and tire

Abstract

Housing body with functional component (1), wherein the housing body (10) comprises: a functional component (20) configured to acquire tire information; and a housing body (10) in which the functional component (20) is accommodated; wherein the housing body (10) comprises a bottom section (11) which is attached to an inner tire surface Ts, a sidewall section (12), which projects from the bottom section (11), comprises a housing section (13) formed by the bottom section (11) and the side wall section (12) and an opening section (14) which is connected to the housing section (13), and at least part of an inner wall surface of the side wall section (12) has an uneven area (15) consisting of a plurality of protruding sections (15a) and / or recessed (15b) sections; wherein a flat surface having a height of half a maximum height Rz from a recessed section (15b) with maximum depth of the recessed sections (15b) to a projecting section (15a) with maximum height of the projecting sections (15a) in the uneven area (15) and parallel to the inner wall surface of the side wall section (12) is defined as the flat reference surface S, and a total cross-sectional area A, which is a sum of the cross-sectional areas of the projecting sections (15a) on the flat reference surface S, and an area As of the flat reference surface S satisfy a relationship 0.2 ≤ A / As ≤ 0.8.

Description

Technical field

[0001] The present invention relates to a housing body with a functional component and a tire, and in particular relates to a housing body with a functional component that can improve the holding force of a functional component in order to prevent the functional component from falling off, to facilitate the task of receiving the functional component into the housing body and to avoid a deterioration of the resistance of the housing body by developing an inner shape of the housing body that receives the functional component, and to a tire. State of the art

[0002] A functional component (for example, a sensor unit with a sensor) configured to acquire tire-internal information such as internal pressure or temperature is installed on the inner surface of the tire (see, for example, patent documents 1 and 2). During installation, a housing (container) made of rubber or the like is bonded to the inner surface of the tire, and the functional component is placed inside the bonded housing. The housing is elastically deformed and presses against a wall surface of the functional component's housing to generate friction, thus holding the functional component within the housing.In a case where the frictional force is excessively low, the holding force of the housing body relative to the functional component is weak. The functional component may detach from the housing body if the tire experiences a strong impact or similar event, or the functional component may move excessively within the housing body, thereby increasing heat generation. Conversely, in a case where the frictional force is excessively high, the task of inserting the functional component into the housing body may be difficult, or the functional component may become stuck in an unintended position during insertion, exerting a heavy load on the housing body and impairing its durability.Patent document 3 further discloses an electronic component capable of acquiring information inside a tire, housed on a functional component that can be attached to the inner circumferential surface of a tire, the functional component comprising a receiving part for the electronic component, a housing with a bottom surface facing the inner circumferential surface of the tire, and a tubular part extending from the circumferential edge of the bottom surface to the inner circumferential surface. Patent document 4 discloses a tire for vehicle wheels comprising an inner surface and at least one anchoring element designed to attach an object to the inner surface, the anchoring element being at least partially integrated into a first section of the tire defining the inner surface and being accessible from the inner surface.The anchoring element comprises: i) a central body provided with a base; ii) a seat defined within the central body and configured to at least partially receive the object, the seat being provided with a first mechanical coupling element configured to interact with a second mechanical coupling element associated with the object to secure the object to the anchoring element; iii) at least one coupling section of the central body to the tire. Patent document 5 discloses a container structure for attaching sensors to tires, the container structure being intended to prevent tire-mounted sensors from being damaged by intense heat.The container structure may comprise: a lower container attached to the inner liner of a tire; an upper container extending from the top of the lower container and having an insertion space into which a sensor can be inserted; and a channel section formed on the inside of the upper container, the channel section being designed to allow air to cool the sensor by flowing inside and outside the upper container when the sensor is inserted into the upper container. List of literature on patent literature Patent document 1: JP 6272225 B Patent Document 2: JP 2016-505438 T Patent document 3: WO 2020 / 070 951 A1 Patent document 4: WO 2019 / 130197 A1 Patent document 5: US 2019 / 0160895 A1 Brief description of the invention: Technical problem

[0003] An object of the present invention is to provide a housing body with a functional component that can improve the holding force of a functional component in order to prevent the functional component from falling off, facilitate the work of receiving the functional component into the housing body and avoid a deterioration of the resistance of the housing body by developing an inner shape of the housing body that receives the functional component and a tire. Solution to the problem

[0004] A housing body with a functional component according to an embodiment of the present invention for fulfilling the above-described problem is a housing body with a functional component that includes a functional component configured to acquire tire information, and a housing body in which the functional component is received. The housing body includes a bottom section attached to an inner tire surface, a side wall section projecting from the bottom section, a housing section formed by the bottom section and the side wall section, and an opening section communicating with the housing section. At least a portion of an inner wall surface of the side wall section has an uneven area consisting of a plurality of projecting sections and / or recessed sections.A flat surface having a height of half the maximum height Rz from the recessed section of maximum depth to the projecting section of maximum height in the uneven area and parallel to the inner wall surface of the side wall section is defined as the flat reference surface S, and a total cross-sectional area A, which is a sum of the cross-sectional areas of the projecting sections on the flat reference surface S and an area As of the flat reference surface S, satisfies the relationship 0.2 ≤ A / As ≤ 0.8.

[0005] A tire according to one embodiment of the present invention encloses the aforementioned housing body with functional component, which is attached to an inner surface of the tire. The functional component is contained within the housing section. Advantageous effects of the invention

[0006] One embodiment of the present invention comprises a housing body with a functional component, which includes a functional component configured to acquire tire information, and a housing body in which the functional component is received. The housing body includes a bottom section attached to an inner tire surface, a side wall section projecting from the bottom section, a housing section formed by the bottom section and the side wall section, and an opening section communicating with the housing section. At least a portion of an inner wall surface of the side wall section has an uneven area consisting of a plurality of projecting sections and / or recessed sections.When the functional component is integrated into the housing body, the contact area between the surface of the functional component and the inner wall surface of the housing body's side wall section is reduced compared to the case where the uneven area is not present. Consequently, the frictional force at the contact surface between the surface of the functional component and the housing body's side wall section is reduced, and this frictional force can be adjusted accordingly. This ensures sufficient holding force for the functional component, prevents it from falling out or moving excessively, facilitates the process of integrating the functional component into the housing body, prevents excessive load from being exerted on the housing body during this process, and avoids any deterioration in the housing body's durability.

[0007] Furthermore, by fulfilling the relationship 0.2 ≤ A / As ≤ 0.8, an adequate frictional force can be ensured on the contact surface between the surface of the functional component and the side wall section of the housing body.

[0008] In the housing body with functional component according to one embodiment of the present invention, the uneven area has a maximum height Rz extending from a recessed section with a maximum depth to a projecting section with a maximum height, preferably in the range of 10 µm to 2000 µm. This can improve the holding force of the functional component to effectively prevent it from falling off or moving excessively, facilitate the insertion of the functional component into the housing body, prevent excessive load from being exerted on the housing body during insertion, and avoid a deterioration in the housing body's durability.

[0009] At least part of the uneven area is preferably formed in a region of half or less than the height hb of the housing section on the inner surface of the side wall section. This facilitates easy insertion of the functional component into the housing body and effectively improves the performance of inserting the functional component. In particular, if the uneven area is not provided in the upper half of the side wall section, the holding force of the functional component can be ensured in the lower half of the side wall section where the uneven area is provided, and movement of the functional component within the housing body can be suppressed to reduce heat generation.

[0010] A surface A1 of the uneven area and a surface A0 of the lower half of the inner wall surface of the side wall section preferably satisfy the relationship 0.5 ≤ A1 / A0 ≤ 1.0. This can ensure an adequate frictional force on the contact surface between the surface of the functional component and the side wall section of the housing body.

[0011] Preferably, at least a portion of the uneven area extends continuously from a lower half of the inner wall surface of the side wall section to an upper end of the housing section. When the functional component is housed within the housing body, air can remain between the housing body and the functional component (for example, between the functional component and the bottom section) due to the close contact between the functional component and the side wall section of the housing body, and the functional component may not be positioned appropriately. In contrast, by providing the uneven area as described above, the uneven area, which extends continuously to the upper end of the housing section, acts as an air passage, and the remaining air can escape through the continuous uneven area, allowing the functional component to be positioned appropriately.This can improve the work involved in recording the functional component.

[0012] The protruding and / or recessed sections forming the uneven area are preferably made of vulcanized rubber with a modulus at 100% elongation of 1.0 MPa or more and less than 12.0 MPa. This can provide the durability of the housing body and the easy, compatible integration of the functional component within the housing body.

[0013] The angle of inclination of the side wall section relative to the bottom section, measured at an outer wall side of the side wall section while the functional component is housed in the housing section, is preferably smaller than the angle of inclination of the side wall section relative to the bottom section, measured at the outer wall side of the side wall section while the functional component is not housed in the housing section, and the difference between the angles of inclination is preferably in the range of 5° to 15°. This can prevent excessive deformation of the housing body in which the functional component is housed, while simultaneously providing a limiting force with which the functional component can be adequately confined.Particularly when the difference in angle between the tilt angles before and after the functional component is in the range of 5° to 15°, the limiting force of the housing body with respect to the functional component and the degree of deformation at which the housing body is not damaged are extremely well balanced. Thus, the housing body cannot be damaged and the functional component cannot fall out during travel.

[0014] The width of the opening section is preferably smaller than a minimum width of the housing section, and the circumferential length D2 u of an upper section of the housing section and a circumferential length D1 u The upper section of the functional component preferably satisfies a relationship 0.60 ≤ D2 u / D1 u≤ 0.95. This can increase the limiting force of the housing body with respect to the functional component, suppress the movement of the functional component, and thus prevent damage to the housing of the functional component during high-speed operation. Furthermore, a good balance is maintained between the limiting force of the housing body with respect to the functional component and the degree of deformation at which the housing body is not damaged, thus also preventing damage to the housing body.

[0015] The tire according to one embodiment of the present invention is preferably a pneumatic tire, but can also be a non-pneumatic tire. In a pneumatic tire, the interior can be filled with any gas, including air and inert gases such as nitrogen. Brief description of the drawings Fig.Figures 1(A) to 1(D) illustrate an embodiment of a housing body with a functional component according to the present invention. Fig. 1(A) is a perspective view illustrating the interior of the housing body, where a section of a side wall section of the housing body is cut off, while the functional component is not included. Fig. 1(B) is a cross-sectional view illustrating the entire housing body, which is in Fig. 1(A) is illustrated, Fig. 1(C) is an enlarged perspective view of an inner wall surface of the side wall section of the housing body, which is located in Fig. 1(A) is illustrated, and Fig. 1(D) is a cross-sectional view illustrating the entire housing body while including the functional component. Fig.Figures 2(A) to 2(E) are perspective views illustrating other embodiments of an uneven area formed on the inner wall surface of the side wall section of the housing body. Fig. 3(A) is a perspective view to describe the dimensions of the uneven area, and Fig. 3(B) is a cross-sectional view to describe the dimensions of the uneven area. Fig. Figure 4 is a cross-sectional view illustrating another embodiment of the housing body with functional component according to the present invention. Fig. Figure 5 is a cross-sectional view illustrating another embodiment of the housing body with functional component according to the present invention. Fig. Figures 6(A) to 6(D) illustrate an embodiment of the housing body with functional component before and after the functional component has been received. Fig.Figure 6(A) is a perspective view illustrating the housing body with functional component, in which the functional component is not included. Fig. Figure 6(B) is a cross-sectional view illustrating the housing body with functional component, in which the functional component is not included. Fig. Figure 6(C) is a perspective view illustrating the housing body with the functional component in which the functional component is included, and Fig. Figure 6(D) is a cross-sectional view illustrating the housing body with the functional component in which the functional component is included. Fig. Figures 7(A) to 7(B) are half cross-sectional views of the housing body with a functional component to describe the dimensions of the housing body. Fig.Figure 8 is a meridian cross-sectional view illustrating an embodiment of a pneumatic tire in which a housing body with a functional component is attached to an inner tire surface. Fig. 9 is an enlarged cross-sectional view showing the housing body with functional components of Fig. 8 illustrates. Description of embodiments

[0016] The following describes in detail embodiments of a housing body with a functional component of the present invention with reference to the accompanying drawings. A housing body with a functional component of the present invention is described in detail below. Fig. The illustrated housing body 1 with functional component shown in Figures 1(A) to 1(D) includes a functional component 20 configured to capture tire information and a housing body 10 containing the functional component 20. The housing body 1 with functional component in Fig.1(A) to 1(C) includes the housing body 10 in which the functional component 20 is not included, and the housing body 1 with functional component in Fig. 1(D) encloses the housing body 10 in which the functional component 20 is contained.

[0017] The housing body 10 includes a flat, plate-shaped bottom section 11 which is attached to the inner surface of the tire, a cylindrical side wall section 12 which projects from the bottom section 11, a housing section 13 which is formed by the bottom section 11 and the side wall section 12, and an opening section 14 which is connected to the housing section 13.

[0018] The bottom section 11 is the longest of the sections (and has the largest diameter) that form the housing body 10. The side wall section 12 is shaped such that it is inclined inwards from a direction perpendicular to the bottom section 11. Accordingly, the housing section 13 formed by the bottom section 11 and the side wall section 12 has a substantially trapezoidal cross-sectional shape. In other words, the cross-sectional width of the housing section 13 gradually decreases towards an upper section and is smallest at its maximum height. The side wall section 12 includes a locking section 12e, which is shaped at one end 12a to be bent towards the opening section 14, and at another end 12b is attached to the bottom section 11.After the functional component 20 is received, the locking section 12e is brought into contact with a top surface of the functional component 20 and serves to secure the functional component 20 once it is received. The width of the opening section 14, into which the functional component 20 is inserted, is, in a cross-sectional view, smaller than the minimum width of the housing section 13 (the width in a position adjacent to the opening section 14).

[0019] In Fig.1. Each of the base section 11, the side wall section 12, and the opening section 14 has a circular, planar shape, and the housing section 13 has a truncated conical shape. The planar shapes of the base section 11, the side wall section 12, and the opening section 14 are not restricted to a specific shape and can have any other planar shape or be different planar shapes from one another. The shape of the housing section 13 is also not restricted to a specific shape.

[0020] In such a housing body 10, an uneven area 15 is formed on at least part of an inner wall surface 12x of the side wall section 12, forming a surface with fine irregularities. The uneven area 15 is formed by a plurality of projecting sections 15a and / or recessed sections 15b and can be formed by a regular arrangement of the plurality of projecting sections 15a and / or recessed sections 15b. For example, in Fig.1(C) The projecting sections 15a and the recessed sections 15b are arranged alternately such that the plurality of adjacent projecting sections 15a have no common side, thereby forming the uneven area 15. The uneven area 15 may be uniformly provided with the same shape and density over its entire surface with respect to the inner wall surface 12x of the side wall section 12, or it may be partially provided with different shapes and densities of irregularities.

[0021] The shape of the uneven region 15 is not particularly restricted and any shape can be assumed. Examples of the uneven region 15 include a cylindrical recessed section 15b, as in Fig. Figure 2(A) illustrates a rectangular prism-shaped recessed section 15b, as shown in Fig. Figure 2(B) illustrates a partially curved linear projecting section 15a, as shown in Fig.2(C) illustrates a square pyramidal projecting section 15a, as in Fig. 2(D) illustrates, and includes a projecting section 15a having a gradually decreasing diameter towards an end section formed in a curved surface, as shown in Fig. 2(E) illustrates.

[0022] As in Fig.As illustrated in Figure 1(D), the functional component 20 includes a housing 21 and an electronic component 22. The housing 21 has a hollow structure in which the electronic component 22 is contained. Depending on requirements, the electronic component 22 may include, for example, a sensor 23 for acquiring tire information, a transmitter, a receiver, a control circuit, and a battery. Examples of tire information acquired by the sensor 23 include the internal temperature and pressure of a pneumatic tire, as well as the degree of wear of a tread section. For example, a temperature sensor or a pressure sensor is used to measure an internal temperature or pressure.In a case where a degree of wear on the tread section is detected, a piezoelectric sensor, including a piezoelectric element, can be used as sensor 23. The piezoelectric element detects an output voltage corresponding to the deformation of a tire during driving and determines the degree of wear of the tread section according to the output voltage. An accelerometer or a magnetic sensor can also be used. The functional component 20 is configured to transmit the tire information acquired by sensor 23 from within the tire. To facilitate handling of the functional component 20, a button section can be provided protruding from the top of the housing 21, and this button section can function as an antenna.

[0023] The internal structure of the in Fig.The functional component 20 illustrated in Figure 1(D) represents an example, and the internal structure is not limited to it. The sensor 23 may be attached to the housing body 10 by means of adhesive tape, an adhesive, or the like, or it may not be attached to the housing body 10 at all.

[0024] In one embodiment of the present invention, the uneven area 15, which includes the projecting section 15a and / or the recessed section 15b, and the housing 21 of the functional component 20 are not joined together, the bottom surface of the housing 21 is not provided with a groove, a projecting section or a recessed section, and the side surface of the housing 21 is not provided with a groove, a projecting section or a recessed section that can be joined together with the uneven area 15.

[0025] The housing body with functional component described above includes a functional component 20 configured to capture tire information and a housing body 10 in which the functional component 20 is received. The housing body 10 includes the bottom section 11, which is attached to the inner surface of the tire, the sidewall section 12, which projects from the bottom section 11, the housing section 13, which is formed by the bottom section 11 and the sidewall section 12, and the opening section 14, which communicates with the housing section 13. At least a portion of the inner wall surface 12x of the sidewall section 12 has the uneven area 15, which consists of a plurality of projecting sections 15a and / or recessed sections 15b.When the functional component 20 is received in the housing body 10, the contact area between the surface of the functional component 20 and the inner wall surface 12x of the side wall section 12 of the housing body 10 is reduced compared to the case where the uneven area 15 is not provided. This reduces the frictional force at the contact surface between the surface of the functional component 20 and the side wall section 12 of the housing body 10, allowing the frictional force to be adjusted appropriately. This ensures sufficient holding force for the functional component 20, prevents it from falling off or moving excessively, facilitates the task of receiving the functional component in the housing body, prevents excessive load from being exerted on the housing body 10 during this process, and avoids any deterioration in the durability of the housing body 10.

[0026] In the housing body with functional component described above, the projecting section 15a and / or the recessed section 15b, which form the uneven area 15, are preferably made of vulcanized rubber having a modulus at 100% elongation of 1.0 MPa or more and less than 12.0 MPa. By having these physical properties, the protruding section 15a and the recessed section 15b ensure the durability of the housing body 10 and the trouble-free integration of the functional component 20 into the housing body 10. The uneven area 15 can be made of the same material as the housing body 10.For example, the uneven area 15 can be formed in one piece from rubber with a different hardness than that of the housing body 10 by using a mold to form the housing body 10, or the uneven area 15 formed separately from the housing body 10 can be bonded to the inner wall surface 12x of the side wall section 12 of the housing body 10.

[0027] In the housing body with functional component described above, the dimensions and the area of ​​the uneven region 15 are preferably defined as follows. As in the Fig. 3(A) and Fig.As illustrated in Figure 3(B), a height from a recessed section 15bm with maximum depth to a projecting section 15am with maximum height in the uneven region 15 is defined as a maximum height Rz. This maximum height Rz is one of the roughness indices of the JIS and is measured according to JIS B0601. The maximum height Rz of the uneven region 15 is preferably in the range of 10 µm to 2000 µm, and more preferably in the range of 100 µm to 2000 µm. In a case where the plurality of recessed sections 15b is formed on the inner wall surface 12x of the side wall section 12 (see, for example, Figure 3(B)), the maximum height Rz is defined as follows: Fig. 2(A)), the inner wall surface 12x is considered as the projecting section 15am with maximum height, and the maximum height Rz is measured in the same way as described above.

[0028] Appropriately defining the maximum height Rz of the unevenness in the uneven area 15 in this way can improve the holding force of the functional component 20 to effectively prevent it from falling off or moving excessively, facilitate the insertion of the functional component 20 into the housing body 10, prevent excessive load from being exerted on the housing body 10 during insertion, and avoid a deterioration of the housing body 10's durability. If the maximum height Rz of the uneven area 15 is less than 10 µm, the height of the protruding section 15a is insufficient, and thus the frictional force cannot be adequately adjusted.On the other hand, if the maximum height Rz of the uneven area 15 is greater than 2000 µm, the protruding section 15a will be quickly damaged when picking up the functional component 20, which degrades the durability, and the task of picking up the functional component 20 cannot be easily carried out due to an excessively high frictional force.

[0029] As in Fig.As illustrated in Figure 3(A), a flat surface with a height of half (0.5 × Rz) of the maximum height Rz and parallel to the inner wall surface 12x of the side wall section 12 is defined as the flat reference surface S in the uneven region 15. That is, the flat reference surface S is a flat surface with a height of half the maximum height Rz of the recessed section 15bm with maximum depth in the uneven region 15. Here, a total cross-sectional area A, which is a sum of the cross-sectional areas of the projecting sections 15a on the flat reference surface S, and an area As of the flat reference surface S preferably satisfy the relationship 0.2 ≤ A / As ≤ 0.8. Here, the cross-sectional area of ​​a projecting section 15a on the flat reference surface S is the area of ​​the shaded section that is in Fig.Figure 3(A) illustrates this, where the flat reference surface S can be arbitrarily defined. In a case where the plurality of recessed sections 15b is formed on the inner wall surface 12x of the side wall section 12 (see, for example, Figure 3(A)), the following applies: Fig. 2(A)), the inner wall surface 12x is considered to be the projecting section 15am with maximum height, and the total cross-sectional area A is an area calculated on the basis of the flat reference surface S with a height half the maximum height Rz in the same manner as described above. As in the Fig. 3(A) and Fig. As illustrated in Figure 3(B), in the uneven area 15 the heights and depths of the projecting sections 15a and the recessed sections 15b need not all be the same, and the overall shapes and cross-sectional shapes on the flat reference surface S of the projecting sections 15a and the recessed sections 15b may differ from each other.

[0030] By appropriately adjusting the ratio of the total cross-sectional area A to the area As in this way, a suitable frictional force can be achieved on a contact surface between the surface of the functional component 20 and the side wall section 12 of the housing body 10. If the ratio of the total cross-sectional area A to the area As is less than 0.2, the projecting section 15a in the uneven area 15 is excessively small, so that the frictional force cannot be sufficiently ensured. Conversely, if the ratio of the total cross-sectional area A to the area As is greater than 0.8, the number of projecting sections 15a in the uneven area 15 increases excessively, which excessively increases the frictional force.

[0031] Fig. Figure 4 illustrates a further embodiment of the housing body with functional component of the present invention. Fig.4 is at least part of the uneven area 15 formed in the lower half of the inner wall surface 12x of the side wall section 12. The lower half of the inner wall surface 12x lies within an area of ​​half (0.5 × hb) or less than the height hb of the housing section 13. Fig.4. The uneven area 15 is formed continuously from the lower end of the side wall section 12, and the height h of the upper end of the uneven area 15 is greater than, but not limited to, half the height hb of the housing section 13. Furthermore, the uneven area 15 can be formed continuously from the lower end of the side wall section 12, and the height h of the upper end of the uneven area 15 can be half or less than the height hb of the housing section 13; the uneven area 15 can be formed locally only in the middle section of the inner wall surface 12x, such that the upper and lower ends of the uneven area 15 include half the height hb of the housing section 13; or the uneven area 15 can be formed in a portion of the inner wall surface 12x, such that the upper and lower ends of the uneven area 15 are enclosed in the lower half of the inner wall surface 12x.Here, when the functional component 20 is inserted into the housing body 10, the opening section 14 is widened and the functional component 20 is inserted. The part of the housing body 10 that comes into contact with the functional component 20 is primarily the lower half of the inner wall surface 12x of the side wall section 12. Therefore, forming the uneven area 15 in the lower half of the inner wall surface 12x of the side wall section 12 is advantageous for achieving the effects of the present invention. The height hb of the housing section 13 is a height measured in a state where the functional component 20 is not inserted into the housing body 10.

[0032] By forming the uneven area 15 in this way, the functional component 20 can be easily received in the housing body 10, and the performance of receiving the functional component 20 is effectively improved. In particular, if the uneven area is not provided in the upper half of the inner wall surface 12x of the side wall section 12, the holding force of the functional component 20 can be ensured in the lower half of the inner wall surface 12x of the side wall section 12, where the uneven area 15 is provided, and the movement of the functional component 20 within the housing body 10 can be suppressed to reduce heat generation.

[0033] Furthermore, an area A1 of the uneven region 15 and an area A0 of the lower half of the inner wall surface 12x of the side wall section 12 preferably satisfy the relationship 0.5 ≤ A1 / A0 ≤ 1.0. Here, the area A1 of the uneven region 15 denotes an area occupied by a section in which the uneven region 15 is located in the lower half of the inner wall surface 12x of the side wall section 12, and not a surface area in which the shapes of the projecting section 15a and the recessed section 15b are taken into account. If the uneven region 15 is subdivided and located at a plurality of positions on the inner wall surface 12x, the area A1 of the uneven region 15 is the total area of ​​all the location positions.Furthermore, if the uneven area 15 is designed such that it extends beyond the lower half of the inner wall surface 12x of the side wall section 12, the section of the uneven area 15 which extends beyond the lower half of the inner wall surface 12x is not considered to be the area A1 of the uneven area 15.

[0034] By appropriately adjusting the ratio of area A1 to area A0 in this way, a suitable frictional force can be achieved on the contact surface between the surface of the functional component 20 and the side wall section 12 of the housing body 10. If the ratio of area A1 to area A0 is less than 0.5, the holding force of the functional component 20 in the lower half of the inner wall surface 12x of the side wall section 12 cannot be sufficiently guaranteed.

[0035] Fig.Figure 5 illustrates a further embodiment of the housing body with functional component of the present invention. Fig. 5 at least part of the uneven area 15 is formed with a connecting section 15x, which extends continuously from the lower half of the inner wall surface 12x of the side wall section 12 to the upper end of the housing section 13. The connecting section 15x acts as a passage for remaining air when the functional component 20 is installed.

[0036] When the functional component 20 is received in the housing body 10, air may remain between the housing body 10 and the functional component 20 due to the close contact between the functional component 20 and the side wall section 12 of the housing body 10 (for example, between the functional component 20 and the bottom section 11), potentially preventing the functional component 20 from being inserted in a suitable position. However, by forming the connecting section 15x in part of the uneven area 15 as described above, the connecting section 15x acts as an air passage, allowing the remaining air to escape and enabling the functional component 20 to be inserted in a suitable location. This can improve the process of receiving the functional component 20.

[0037] Fig.Figures 6(A) to 6(D) illustrate an embodiment of the housing body with a functional component before and after the functional component has been inserted. The housing body 1 with functional component in Fig. 6(A) to 6(B) includes the housing body 10 in which the functional component 20 is not included, and the housing body 1 with functional component in Fig. 6(C) and Fig. 6(D) encloses the housing body 10 in which the functional component 20 is housed.

[0038] As in Fig.As illustrated in Figures 6(A) to 6(D), in the housing body 1 with functional component, the angle of inclination θ2 of the side wall section 12 with respect to the bottom section 11 is configured to be smaller than the angle of inclination θ1 of the side wall section 12 with respect to the bottom section 11 when the functional component 20 is housed in the housing section 13. Each of the angles of inclination θ1 and θ2 is an angle measured on the outer wall side of the side wall section 12. When the functional component 20 is inserted into the housing space 13 from the opening section 14, the side wall section 12 bends outwards and deforms, thus widening the opening section 14 and consequently decreasing the angle of inclination θ of the side wall section 12 with respect to the bottom section 11.The angle difference (θ1 - θ2) between the inclination angle θ1 before the inclusion of the functional component 20 and the inclination angle θ2 after the inclusion of the functional component 20 is preferably configured to be in the range of 5° to 15°.

[0039] Here, when measuring the inclination angle θ (θ1, θ2) of the side wall section 12, the angle can be calculated using a CT scan or similar method. Only when measuring the inclination angle θ of the side wall section 12, as in Fig.As illustrated in Figure 7(A), the inclination angle θ1 before the insertion of the functional component 20 and the inclination angle θ2 after the insertion of the functional component 20 are each measured by considering the side wall section 12 as a straight line L1 passing through two points corresponding to half of the total height H (0.5 × H) and one-quarter of the total height H (0.25 × H) of the housing body 10 on the outer surface of the side wall section 12. The total height H (maximum height H) of the housing body 10 changes before and after the insertion of the functional component 20, and the inclination angle θ (θ1, θ2) of the side wall section 12 is measured based on the respective height.If a projection is formed on the outer surface of the side wall section 12 at a point corresponding to half or a quarter of the total height H of the housing body 10, the inclination angle θ of the side wall section 12 is measured based on a straight line defined using a lower end section of the projection as a new reference point, excluding the projection itself. The total height H of the housing body 10 is the height from a bottom of the base section 11 to a top of the locking section 12e.

[0040] For the housing body 1 with functional component as just described, the inclination angle θ2 of the side wall section 12 with respect to the bottom section 11, measured on the outer wall side of the side wall section 12, while the functional component 20 is housed in the housing section 13, is smaller than the inclination angle θ1 of the side wall section 12 with respect to the bottom section 11, measured on the outer wall side of the side wall section 12, while the functional component 20 is not housed in the housing section 13. This can prevent excessive deformation of the housing body 10 in which the functional component 20 is housed, while maintaining a restraining force sufficient to retain the functional component 20.In particular, when the angular difference (θ1 - θ2) between the tilt angles before and after the insertion of the functional component 20 is in the range of 5° to 15°, the limiting force of the housing body 10 with respect to the functional component 20 and the degree of deformation at which the housing body 10 is not damaged are extremely well balanced. This prevents damage to the housing body 10 while simultaneously preventing the functional component 20 from detaching during operation.

[0041] The retaining force of the housing body 10 for the functional component 20 is reduced when the angular difference (θ1 - θ2) of the tilt angles is less than 5°. This increases the risk of the functional component 20 detaching during travel, and the movement of the functional component 20 increases, which in turn reduces the strength of the housing body 10. Conversely, if the angular difference (θ1 - θ2) between the tilt angles is greater than 15°, the deformation of the housing body 10 becomes excessive, and there is a likelihood of cracks forming in the housing body 10 during long-distance travel.

[0042] In particular, the angle of inclination θ2 of the side wall section 12 with respect to the bottom section 11, while the functional component 20 is received in the housing section 13, is preferably 90° or more, and more preferably in the range of 90° to 115°. By appropriately adjusting the angle of inclination θ2 after receiving the functional component 20 in this way, stress concentration at the base of the side wall section 12 of the housing body 10 can be mitigated and the strength of the housing body 10 improved. Furthermore, the opening section 14 of the housing body 10 is not excessively narrow, which is suitable for removing the functional component 20.

[0043] If the inclination angle θ2 after the insertion of the functional component 20 is less than 90°, the stress concentration at the base of the side wall section 12 of the housing body 10 increases, and the strain energy during operation increases. As a result, cracks are likely to form at the base of the side wall section 12. Conversely, if the inclination angle θ2 after the insertion of the functional component 20 is greater than 115°, the side wall section 12 will be excessively bent even after the insertion of the functional component 20. This will make the width of the opening section 14 excessively narrow and make it difficult to remove the functional component 20.

[0044] The width of the opening section 14 is preferably smaller than the minimum width of the housing section 13, and a circumferential length D2 u of the upper section of the housing section 13 and a circumferential length D1 uThe upper section of the functional component 20 preferably satisfies the relationship 0.60 ≤ D2 u / D1 u ≤ 0.95. In other words, the circumference length D2 u of the housing section 13 is adjusted so that it is smaller than the circumferential length D1 within a certain range. u the functional component 20, in order to increase the retention force through the housing body 10. This is done as described in Fig. 7(B) illustrates the circumference length D2 uThe circumference of housing section 13 is determined by defining a height of three-quarters of the total internal height H1 (0.75 × H1) of the housing body 10 before the functional component 20 is accommodated as h1, measuring the circumference of housing section 13 at a total of three positions, including the position of height h1 and the positions corresponding to ±25% of height h1 (0.25 × h1) with respect to the position of height h1, and averaging the circumference lengths measured at these three positions. The circumference length D1 u The upper section of the functional component 20 is determined by measuring the circumference length of the functional component 20 in positions corresponding to the three positions of the functional component 20 mentioned above, and by averaging the circumference lengths measured in these three positions.

[0045] Appropriate adjustment of the circumference length D2 u of the housing section 13 and the circumferential length D1 uIn this way, the retaining force of the housing body 10 for the functional component 20 can be increased, and the movement of the functional component 20 can be suppressed, thereby preventing damage to the housing 21 of the functional component 20 during high-speed travel. Furthermore, a good balance is maintained between the retaining force of the housing body 10 against the functional component 20 and the degree of deformation at which the housing body 10 is not damaged, thus also preventing damage to the housing body 10.

[0046] If the ratio D2 Sie / D1 SieIf the ratio D2 is less than 0.60, the retaining force through the housing body 10 increases, but the degree of deformation of the side wall section 12 also increases. This leads to cracks forming in the housing body 10 during long-distance journeys and increases the possibility of damage to the housing body 10. If, on the other hand, the ratio D2 u / D1 u If the coefficient of friction is greater than 0.95, the retaining force through the housing body 10 decreases and the movement of the functional component 20 within the housing body 10 increases. This increases the heat generation due to friction between the housing body 10 and the functional component 20, which can lead to damage to the housing 21 of the functional component 20.

[0047] Furthermore, a circumference length D2 fulfills O of the opening section 14 of the housing body 10 and the circumferential length D1 u of the upper section of the functional component 20 preferably the relationship 0.4 ≤ D2 O / D1 u≤ 0.8. Here, the circumference length D2 is... O of the opening section 14, a circumferential length of the opening section 14, measured in a state in which the functional component 20 is not received in the housing body 10. Suitable adjustment of the circumferential length D2 O of the opening section 14 and the circumferential length D1 u The functional component 20 is thus designed to strike a good balance between the retaining force of the housing body 10 for the functional component 20 and the degree of deformation at which the housing body 10 is not damaged, and can improve the durability of the functional component 20 during high-speed operation. Furthermore, the opening section 14 of the housing body 10 is not excessively narrow, which facilitates the removal of the functional component 20.

[0048] If the ratio D2 O / D1 uIf the ratio is less than 0.4, the opening section 14 is excessively narrow, thus making it difficult to remove the functional component 20. On the other hand, if the ratio D2 O / D1 u If the coefficient of friction is greater than 0.8, the retaining force through the housing body 10 decreases and the movement of the functional component 20 within the housing body 10 increases. This increases the heat generation due to friction between the housing body 10 and the functional component 20, which can lead to damage to the housing 21 of the functional component 20.

[0049] Fig. Figure 8 illustrates a pneumatic tire in which the housing body with functional component is attached to an inner tire surface. As in Fig.As illustrated in Figure 8, a pneumatic tire T includes a tread section t extending in the circumferential direction of the tire and having a ring shape, a pair of sidewall sections s arranged on both sides of the tread section t, and a pair of bead sections b, each arranged on an inner side of the pair of sidewall sections s in the radial direction of the tire.

[0050] A carcass layer 4 is installed between the pair of bead sections b. The carcass layer 4 encloses a multitude of reinforcing cords running radially in the tire direction and is folded from one tire inner surface to one tire outer surface around a bead core 5 located in each of the bead sections b. A bead filler 6, having a triangular cross-sectional shape and made of a rubber compound, is arranged on the outer circumference of the bead core 5. Additionally, an inner liner layer 9 is arranged in a region between the pair of bead sections b on an inner tire surface Ts. The inner liner layer 9 forms the inner tire surface Ts.

[0051] Meanwhile, a plurality of belt layers 7 are embedded on the outer circumferential side of the carcass layer 4 in the tread section t. The belt layers 7 enclose a plurality of reinforcing cords inclined with respect to the tire's circumferential direction, and the reinforcing cords are arranged to intersect between the layers. In the belt layers 7, the angle of inclination of the reinforcing cords with respect to the tire's circumferential direction is set such that it falls within a range of, for example, 10° to 40°. Steel cords are preferably used as the reinforcing cords of the belt layers 7. To improve high-speed durability, at least one belt cover layer 8, formed by arranging reinforcing cords at an angle of, for example, no more than 5° with respect to the tire's circumferential direction, is arranged on an outer circumferential side of the belt layers 7.Organic fiber cord threads such as nylon and aramid are preferably used as the reinforcing cords of the belt cover layer 8.

[0052] It should be noted that the tire internal structure described above is a typical example of a pneumatic tire, but the pneumatic tire is not limited to this.

[0053] In the pneumatic tire described above, the housing body 1 with functional component can be attached to any section of the inner tire surface Ts. However, the housing body 1 with functional component is preferably attached to the inner tire surface Ts that corresponds in particular to the tread section t, the sidewall sections s, and the bead sections b, since the housing body 1 with functional component deforms less during driving and is less likely to detach due to the centrifugal force acting upon it.

[0054] This involves, as in Fig. Figure 9 illustrates that when measuring the inclination angles θ1 and θ2 in a state where the housing body 1 with functional component is attached to the inner surface of the tire, an angle is measured that is formed by a straight line L2, which in a cross-sectional view passes through the other end 12b of the two sides of the sidewall section 12, and the sidewall section 12. For example, even a housing body with a functional component that is not provided with an element corresponding to a bottom section and has a sidewall section that is directly attached to the inner surface of the tire can be measured using the same procedure as described above.

[0055] In the previously mentioned embodiment, an example is described in which the housing body with functional component is attached to the pneumatic tire; however, such a limitation is not intended and the housing body with functional component can also be applied to a tire other than a pneumatic tire. Example

[0056] Tires were manufactured according to the prior art example and Examples 1 to 7. Each tire has a size of 225 / 45R18 and includes a functional component configured to capture tire information, as well as a housing body in which the functional component is contained. The housing body includes a base section attached to the inner surface of the tire, a sidewall section projecting from the base section, a housing section formed by the base section and the sidewall section, and an opening section communicating with the housing section. A housing body containing the functional component is attached to the inner surface of the tire, with the functional component being contained within the housing body.The presence of the uneven area and the properties of the uneven area (maximum height of the unevenness Rz, density of the unevenness (A / As), height position of the upper end (h / hb), area occupied, presence of a connecting section and M100 of the unevenness) were determined as specified in Table 1.

[0057] In Table 1, the "Top End Height Position" is the ratio (h / hb) of the height h of the top end of the uneven area relative to the height hb of the housing section. A value of "1.0" means that the uneven area extends from the bottom end to the top end of the side wall section, while other values ​​indicate that the uneven area extends continuously from the bottom end of the side wall section to the height of the set value. "M100 of Unevenness" denotes the modulus at 100% elongation (MPa), measured in a tensile test at 23°C in accordance with JIS K6251 (using a No. 3 barbell), and indicates the tensile stress at 100% elongation.

[0058] The uptake properties, crack resistance and high-speed resistance of these test tires were evaluated by the following test procedures, and the results are shown in Table 1. Recording characteristics:

[0059] For each test tire, the time required to integrate the functional component into the housing was measured. The evaluation results are expressed as index values ​​using the reciprocal of the measured values, with the measured value of the prior art example being expressed as an index value of 100.

[0060] Higher index values ​​mean less time required and better recording characteristics. Crack formation resistance:

[0061] Each test tire was mounted on a wheel with a rim size of 18 × 7 1 / 2JJ, a load of 80% of the maximum load capacity was applied after an aging treatment in the presence of oxygen at 80°C for five days, and a running test was performed on the tire using a drum testing machine under an air pressure of 250 kPa. Specifically, the speed was increased by 10 km / h every 24 hours from an initial speed of 120 km / h. The tires were driven until a crack was confirmed on the surface of the casing, and the distances traveled at the time of cracking were measured. Evaluation results are expressed as index values, with the prior art example defined as 100. Higher index values ​​indicate better crack resistance. Durability at high speed:

[0062] Each test tire was mounted on a wheel with a rim size of 18 × 7 1 / 2JJ, a load of 88% of the maximum load capacity was applied, and a running test was performed on the tire using a drum testing machine under an air pressure of 360 kPa. Specifically, the speed was increased by 10 km / h every ten minutes from an initial speed of 120 km / h, and the speed at which an anomaly occurred in the data transmitted by the functional component was measured. Evaluation results are expressed as index values, with the prior art example defined as 100. Higher index values ​​indicate better stability at high speeds. [Table 1-I] State of the art example Example 1 Example 2 Example 3 Example 4 Presence of an uneven area No Yes Yes Yes Yes Features of the uneven area Maximum height of the unevenness (µm) - 2500 500 500 500 Density of irregularities (A / As) - 0,9 0,9 0,6 0,6 Height position of the upper end (h / hb) - 1,0 1,0 1,0 0,2 Occupied area (A1 / A0) - 1,0 1,0 1,0 0,4 Presence of the connecting section - No No No No M100 of unevenness (MPa) - 2,0 2,0 2,0 2,0 Recording characteristics 100 120 140 160 180 Crack formation resistance 100 110 130 140 150 Durability at high speed 100 100 120 130 140 [Table 1-II] Example of the state of the art Example 5 Example 6 Example 7 Presence of an uneven area No Yes Yes Yes Features of the uneven area Maximum height of the unevenness (µm) - 500 500 500 Density of irregularities (A / As) - 0,6 0,6 0,6 Height position of the upper end (h / hb) - 0,5 0,5 0,5 Occupied area (A1 / A0) - 1,0 1,0 1,0 Presence of the connecting section - No Yes Yes M100 of unevenness (MPa) - 2,0 2,0 3,0 Recording characteristics 100 200 240 220 Crack formation resistance 100 160 160 180 Durability at high speed 100 130 130 150

[0063] As can be seen from Table 1, the pneumatic tires of Examples 1 to 7, compared to the prior art example, have improved the mounting properties, crack resistance, and high-speed stability. For the pneumatic tires of Examples 1 to 7, it can be said that the functional component could be inserted into a suitable position during mounting, resulting in improved crack resistance and high-speed stability, thus preventing a deterioration in the housing body's stability.

[0064] The present disclosure includes the following inventions [1] to

[10] .

[0065] The invention [1] is a housing body with a functional component, including: a functional component configured to acquire tire information; and a housing body in which the functional component is received. The housing body comprises a bottom section attached to an inner surface of the tire, a side wall section projecting from the bottom section, a housing section formed by the bottom section and the side wall section, and an opening section communicating with the housing section. At least a portion of an inner wall surface of the side wall section has an uneven area consisting of a plurality of projecting sections and / or recessed sections.

[0066] Invention [2] is the housing body with functional component according to invention [1], wherein in the uneven area there is a maximum height Rz from a recessed section with maximum depth of the recessed sections to a protruding section with maximum height of the protruding sections in the range of 10 µm to 2000 µm.Invention [3] is the housing body with functional component according to invention [1] or [2], wherein a flat surface having a height of half a maximum height Rz from a recessed section with maximum depth of the recessed sections to a projecting section with maximum height of the projecting sections in the uneven area and parallel to the inner wall surface of the side wall section is defined as the flat reference surface S, and a total cross-sectional area A, which is a sum of the cross-sectional areas of the projecting sections on the flat reference surface S, and an area As of the flat reference surface S satisfy a relationship 0.2 ≤ A / As ≤ 0.8.Invention [4] is the housing body with functional component according to one of inventions [1] to [3], wherein at least a part of the uneven area is formed in a region of half or less of a height hb of the housing section on the inner wall surface of the side wall section.

[0067] Invention [5] is the housing body with functional component according to one of inventions [1] to [4], wherein an area A1 of the uneven area and an area A0 of a lower half of the inner wall surface of the side wall section satisfy a relationship 0.5 ≤ A1 / A0 ≤ 1.0.

[0068] Invention [6] is the housing body with a functional component according to one of inventions [1] to [5], wherein at least a part of the uneven area is formed continuously from a lower half of the inner wall surface of the side wall section to an upper end of the housing section.

[0069] Invention [7] is the housing body with functional component according to one of inventions [1] to [6], wherein the protruding sections and / or the recessed sections forming the uneven area are made of vulcanized rubber with a modulus at 100% elongation of 1.0 MPa or more and less than 12.0 MPa.

[0070] Invention [8] is the housing body with functional component according to one of inventions [1] to [7], wherein an angle of inclination of the side wall section with respect to the bottom section, measured on an outer wall side of the side wall section while the functional component is received in the housing section, is smaller than an angle of inclination of the side wall section with respect to the bottom section, measured on the outer wall side of the side wall section while the functional component is not received in the housing section, and an angular difference between the angles of inclination is in a range of 5° to 15°.

[0071] Invention [9] is the housing body with functional component according to one of inventions [1] to [8], wherein the opening section has a width that is smaller than a minimum width of the housing section, and a circumferential length D2 u of an upper section of the housing section and a circumferential length D1 u of an upper section of the function component a relationship 0.60 ≤ D2 u / D1 u ≤ 0.95

[0072] Invention

[10] is a tire which encloses the housing body with functional component according to one of inventions [1] to [9], which is attached to the inner surface of the tire. The functional component is received in the housing section. List of reference symbols 1 Housing body with functional component 10 Housing bodies 11. Ground section 12 Side wall section 13 Housing section 14 Opening section 15 uneven area 15a projecting section 15b in-depth section 20 Functional component T pneumatic tires Ts tire inner surface t tread section s side wall section b bead section

Claims

[1] Housing body with functional component (1), wherein the housing body comprises (10): a functional component (20) configured to acquire tire information; and a housing body (10) in which the functional component (20) is accommodated; wherein the housing body (10) comprises a bottom section (11) which is attached to an inner tire surface Ts, a sidewall section (12), which projects from the bottom section (11), comprises a housing section (13) formed by the bottom section (11) and the side wall section (12) and an opening section (14) which is connected to the housing section (13), and at least part of an inner wall surface of the side wall section (12) has an uneven area (15) consisting of a plurality of protruding sections (15a) and / or recessed (15b) sections; wherein a flat surface having a height of half a maximum height Rz from a recessed section (15b) with maximum depth of the recessed sections (15b) to a projecting section (15a) with maximum height of the projecting sections (15a) in the uneven area (15) and parallel to the inner wall surface of the side wall section (12) is defined as the flat reference surface S, and a total cross-sectional area A, which is a sum of the cross-sectional areas of the projecting sections (15a) on the flat reference surface S, and an area As of the flat reference surface S satisfy a relationship 0.2 ≤ A / As ≤ 0.

8. [2] Housing body with functional component (1) according to claim 1, wherein in the uneven area (15) there is a maximum height Rz from a recessed section (15b) with a maximum depth of the recessed sections (15b) to a projecting section (15a) with a maximum height of the projecting sections (15a) in the range of 10 µm to 2000 µm. [3] Housing body with functional component (1) according to one of claims 1 to 2, wherein at least a part of the uneven area (15) is formed in an area of ​​half or less of a height hb of the housing section (13) on the inner wall surface of the side wall section (12). [4] Housing body with functional component (1) according to one of claims 1 to 3, wherein an area A1 of the uneven area (15) and an area A0 of a lower half of the inner wall surface of the side wall section (12) satisfy a relationship 0.5 ≤ A1 / A0 ≤ 1.

0. [5] Housing body with functional component (1) according to one of claims 1 to 4, wherein at least a part of the uneven area (15) is formed continuously from a lower half of the inner wall surface of the side wall section (12) to an upper end of the housing section (13). [6] Housing body with functional component (1) according to any one of claims 1 to 5, wherein the protruding sections (15a) and / or the recessed sections (15b) forming the uneven area (15) are made of vulcanized rubber having a modulus at 100% elongation of 1.0 MPa or more and less than 12.0 MPa. [7] Housing body with functional component (1) according to one of claims 1 to 6, wherein an angle of inclination of the side wall section (12) with respect to the bottom section (11), measured on an outer wall side of the side wall section (12) while the functional component is included in the housing section (13), is smaller than an angle of inclination of the side wall section (12) with respect to the bottom section (11), measured on the outer wall side of the side wall section (12) while the functional component is not included in the housing section (13), and an angle difference between the angles of inclination is in a range of 5° to 15°. [8] Housing body with functional component (1) according to one of claims 1 to 7, wherein the opening section (14) has a width that is smaller than a minimum width of the housing section (13), and a circumference length D2 u an upper section of the housing section (13) and a circumferential length D1 uof an upper section of the function component (20) a relationship 0.60 ≤ D2 u / D1 u ≤ 0.95 [9] Tires (T), comprising: the housing body with functional component (1) according to one of claims 1 to 8, which is attached to the inner surface of the tire Ts, wherein the functional component (20) is included in the housing section (13).

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