Housing with functional component, and tire

Abstract

To provide a housing with a functional component, and a tire, capable of enhancing sensing sensitivity of the functional component to improve measurement performance of tire information while improving workability when accommodating the functional component.SOLUTION: In a functional component-equipped housing including a functional component having a sensor function for detecting tire information and a housing 10 in which the functional component is accommodated, the housing 10 has: an accommodation portion 13 for accommodating the functional component; an opening 14 that communicates with the accommodation portion 13 so as to insert and remove the functional component; and a bottom portion 11 being parallel with the opening 14, and including a plane that comes into contact with the functional component when accommodating the functional component. The bottom portion 11 has a first region Ra made of a material A having elasticity and a second region Rb made of a material B harder than the material A.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a container with functional parts and a tire, and more specifically, to a container with functional parts and a tire that improves workability when storing the functional parts while increasing the sensing sensitivity of the functional parts and improving the measurement performance of tire information. [Background technology]

[0002] In order to obtain tire information, functional components (e.g., a sensor unit including a sensor) are installed on the inner surface of the tire (see, for example, Patent Documents 1 and 2). When installing the 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 a case with functional parts, if the entire case is made of a soft material with an emphasis on ease of housing the functional parts in the case, there is a problem that the bottom of the case deforms more than necessary, making it difficult for tire deformation to be transmitted to the functional parts, and adversely affecting the measurement performance of the functional parts. Conversely, if the entire case is made of a hard material, it becomes difficult to house the functional parts in the case, which can deteriorate the workability when housing the functional parts, or the functional parts can be fixed in an unintended position inside the case, making it impossible to accurately detect tire information. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6272225 [Patent Document 2] Special Publication No. 2016-505438 Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a container with functional parts and a tire that improves the workability when storing functional parts while increasing the sensing sensitivity of the functional parts and improving the measurement performance of tire information. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the functional part-equipped container of the present invention is a container with a functional part having a sensor function for detecting tire information and a container in which the functional part is accommodated, the container having a storage section for accommodating the functional part, an opening communicating with the storage section for inserting and removing the functional part, and a bottom parallel to the opening and including a plane that comes into contact with the functional part when the functional part is accommodated, and the bottom having a first region made of an elastic material A and a second region made of a material B harder than material A.

[0007] The tire of the present invention is characterized in that the above-mentioned functional part-equipped container is fixed to an inner surface of the tire, and the functional part is contained in the container. Effect of the Invention

[0008] In the present invention, the bottom of the container has a first region made of material A and a second region made of material B harder than material A. By having only a part of the container made of a hard material, rather than the entire container, it is possible to avoid problems such as adverse effects on the measurement performance of the functional parts and deterioration of workability when storing the functional parts. Specifically, the bottom of the container has a part (first region) that is easily deformed in response to tire deformation and a part (second region) that is not easily deformed, and in particular the second region can efficiently transmit the impact from the road surface when the tire touches the ground to the functional parts. By configuring the container in this way, it is possible to improve the workability when storing the functional parts while increasing the sensing sensitivity of the functional parts and improving the measurement performance of tire information. Sensing sensitivity means the ability to detect changes in physical quantities caused by impacts from the road surface with high sensitivity, and improving the sensing sensitivity increases the peak-to-peak value of the output waveform, making it possible to accurately grasp the timing when the physical quantity changes due to impacts from the road surface.

[0009] In the case with functional parts of the present invention, it is preferable that the area S of the bottom surface of the case and the area Sb of the second region satisfy the relationship of 0.01≦Sb / S≦0.50. By satisfying this relationship, absorption of tire deformation due to excessive deformation of the bottom surface is suppressed, and the shock received from the road surface when the tire touches the ground can be transmitted to the functional parts more efficiently.

[0010] Material B is a rubber or elastomer having elasticity, and has a modulus M at 50% elongation of material A. 50a [MPa] and modulus M of material B at 50% elongation 50b [MPa] means 1.2≦M 50b / M 50a When material B is a rubber or elastomer having elasticity, by appropriately setting the modulus ratio of material A to material B as described above, it is possible to improve the workability when accommodating the functional parts and the sensing sensitivity of the functional parts in a well-balanced manner.

[0011] Tensile modulus Et of material B bcan be set in the range of 100 MPa to 100,000 MPa. When material B is a hard material such as resin or metal, the tensile modulus Et b By appropriately setting, it is possible to improve the workability when housing the functional parts and the sensing sensitivity of the functional parts in a well-balanced manner.

[0012] It is preferable that the height hA [mm] from the bottom to the opening in the first region and the height hB [mm] from the bottom to the opening in the second region satisfy the relationship 0 mm ≦ hA-hB ≦ 2 mm. By making the height hB of the second region equal to or smaller than the height hA of the first region in this way, it is possible to improve the workability when accommodating the functional components and the sensing sensitivity of the functional components in a well-balanced manner.

[0013] The functional component has a housing that houses an electronic component and at least one film-like piezoelectric element fixed to a wall surface of the housing, and it is preferable that, in a no-load state and when the functional component is housed in the container, at least a part of the second region overlaps with a projection region formed by projecting the piezoelectric element onto the outer surface of the housing, whereby a good contact state between the second region and the piezoelectric element is maintained, thereby enhancing the sensing sensitivity of the functional component.

[0014] It is preferable that the overlapping area between the second region and the projection area of ​​the piezoelectric element is 10% to 150% of the area of ​​the projection area of ​​the piezoelectric element, which ensures sufficient output from the piezoelectric element and enhances the sensing sensitivity of the functional component.

[0015] In the case of the present invention, it is preferable that the case for accommodating the functional parts is fixed to the back surface of the tread portion, and the functional parts are accommodated in the case. It is preferable that the case is fixed to the back surface of the tread portion by an adhesive. Even when such a case is used, the above-mentioned excellent effects can be obtained.

[0016] The tire of the present invention is preferably a pneumatic tire, but may be a non-pneumatic tire. In the case of a pneumatic tire, the inside of the tire can be filled with air, an inert gas such as nitrogen, or other gases.

[0017] In the present invention, the modulus at 50% elongation M 50 is the tensile stress at 50% elongation measured in accordance with JIS K6251. The tensile modulus Et of material B b is measured in accordance with JIS K7161-1. [Brief description of the drawings]

[0018] [Figure 1] 1 is a perspective view showing an example of a functional part-equipped container according to an embodiment of the present invention; [Diagram 2] 2 is a perspective view showing the inside of the functional component-equipped container shown in FIG. 1 with a part cut away. FIG. [Diagram 3] 2 is a plan view showing the functional component-equipped container of FIG. 1; [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. [Diagram 5] 2 is an explanatory diagram of each area in the functional component-equipped container of FIG. 1; [Figure 6] 1A and 1B are enlarged cross-sectional views showing the periphery of the bottom of a container with functional components. [Figure 7] 10(a) to 10(d) are perspective views showing modified examples of a functional-component-equipped container according to an embodiment of the present invention, with a portion of the container cut away to show the inside of the container. [Figure 8] 1 is a meridian cross-sectional view showing an example of a pneumatic tire according to an embodiment of the present invention. [Figure 9] FIG. 4 is a diagram showing an example of an output waveform from a piezoelectric element. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings, in which: Figures 1 to 5 show a functional part-equipped container according to an embodiment of the present invention.

[0020] 1 to 5, the functional part 20 is housed inside a housing body 10. The housing body 10 has a flat bottom 11 fixed to the inner surface of the tire, a cylindrical side wall 12 protruding from the bottom 11, a housing section 13 formed by the bottom 11 and the side wall 12, and an opening 14 communicating with the housing section 13 and for inserting and removing the functional part 20. The housing section 13 is the internal region of the housing body 10 excluding the thickness of the opening 14.

[0021] The bottom 11 includes a plane that is parallel to the opening 14 and comes into contact with the bottom surface of the functional component 20 when the functional component 20 is housed therein. As shown in FIG. 5, the bottom 11 also has a first region Ra made of elastic material A and a second region Rb made of material B harder than material A. Here, the hardness of material A and material B can be compared, for example, by hardness measured at a temperature of 20° C. using a durometer type A in accordance with JIS K6253, and in this case, the hardness of material B is greater than that of material A. An example of material A having elasticity is rubber or elastomer, and its modulus M at 50% elongation is 50a Preferably, the pressure is in the range of 0.5 MPa to 4.0 MPa. In the present invention, it is necessary that at least the bottom surface 11x includes a first region Ra made of material A and a second region Rb made of material B, but other portions constituting the container 10 (for example, portions of the bottom 11 other than the bottom surface 11x and the side wall portion 12) may be made of the same material as material A or may be made of a material different from material A.

[0022] The functional part 20 has a contact surface 21 that contacts the inner surface of the tire. That is, the contact surface 21 is a surface that contacts the bottom surface 11x of the container 10. The functional part 20 has a structure in which various electronic parts are housed inside a housing 23. The electronic parts can be configured to include various sensors, transmitters, receivers, control circuits, batteries, etc. for acquiring tire information. Examples of tire information acquired by the sensors include the internal temperature and internal pressure of the pneumatic tire, and the amount of wear of the tread portion. For example, a temperature sensor or a pressure sensor is used to measure the internal temperature and internal pressure. When detecting the amount of wear of the tread portion of the tire, for example, a sensor element 22 made of a piezoelectric element is disposed on the contact surface 21 of the functional part 20, and the sensor element 22 detects an output voltage corresponding to the tire deformation during running, and detects the amount of wear of the tread portion based on the output voltage. In addition, an acceleration sensor or a magnetic sensor can also be used.

[0023] At least one film-like piezoelectric element is fixed to the wall surface of the housing 23 of the functional part 20. This sensor element 22 (piezoelectric element) can be disposed on either the outer surface or the inner surface of the housing 23. Such a sensor element 22 is configured to come into direct contact with at least a part of the second region Rb or indirectly through the wall surface of the housing 23 when the housing with the functional part is in an unloaded state and the functional part 20 is housed in the housing 10. Fig. 6(a) shows a state in which the sensor element 22 is provided on the outer surface of the bottom of the housing 23 of the functional part 20 and the sensor element 22 and the second region Rb are in direct contact, and Fig. 6(b) shows a state in which the sensor element 22 is provided on the inner surface of the bottom of the housing 23 of the functional part 20 and the sensor element 22 and the second region Rb are in indirect contact through the wall surface of the housing 23 of the functional part 20.

[0024] In the above-mentioned container with functional parts, the bottom 11 of the container 10 has a first region Ra made of material A and a second region Rb made of material B. By having only a part of the container 10, not the whole, made of a hard material, it is possible to avoid problems such as adverse effects on the measurement performance of the functional parts 20 and deterioration of workability when storing the functional parts 20. Specifically, the bottom 11 in the container 10 has a part (first region Ra) that is easily deformed in response to tire deformation and a part (second region Rb) that is not easily deformed, and in particular the second region Rb can efficiently transmit the impact from the road surface when the tire touches the ground to the functional parts 20. By configuring the container 10 in this way, it is possible to improve the workability when storing the functional parts 20, while increasing the sensing sensitivity of the functional parts 20 and improving the measurement performance of tire information.

[0025] In particular, the area S [mm 2 ] and the area Sb of the second region Rb [mm 2 ] preferably satisfies the relationship of 0.01≦Sb / S≦0.50, and more preferably satisfies the relationship of 0.10≦Sb / S≦0.30. By satisfying this relationship, absorption of tire deformation due to excessive deformation of the bottom surface 11x can be suppressed, and the impact received from the road surface when the tire touches the ground can be more efficiently transmitted to the functional part 20. Note that, in both cases where the bottom surface 11x is flat and where it is not flat (for example, where the second region Rb protrudes from the bottom surface 11x), the area S of the bottom surface 11x is defined as the area of ​​the entire bottom surface 11x including the second region Rb when the bottom surface 11x is viewed in a plan view.

[0026] In the above-mentioned functional part-equipped container, material B can be made of elastic rubber or elastomer. In this case, the modulus M of material A at 50% elongation is 50a [MPa] and modulus M of material B at 50% elongation 50b [MPa] is 1.2≦M 50b / M 50a When material B is a rubber or elastomer having elasticity, it is preferable that the modulus ratio M 50b / M 50aBy appropriately setting, it is possible to improve the workability when housing the functional component 20 and the sensing sensitivity of the functional component 20 in a well-balanced manner.

[0027] Alternatively, material B can be made of a hard material such as resin or metal (e.g., aluminum alloy, etc.). In this case, the tensile modulus Et b is preferably in the range of 100 MPa to 100,000 MPa, and more preferably in the range of 1,000 MPa to 5,000 MPa. When material B is a resin or a metal, the tensile modulus Et b By appropriately setting, it is possible to improve the workability when housing the functional component 20 and the sensing sensitivity of the functional component 20 in a well-balanced manner.

[0028] In the above-mentioned container with functional parts, the height hA of the first region Ra (see FIG. 4) and the height hB of the second region Rb (see FIG. 4) preferably satisfy the relationship of 0 mm≦hA-hB≦2 mm, and more preferably satisfy the relationship of 0.3 mm≦hA-hB≦1.0 mm. That is, the height hB of the second region Rb should be equal to or smaller than the height hA of the first region Ra. The heights hA and hB [mm] are the heights from the bottom surface 11x (bottom 11) to the opening 14 in each of the first region Ra and the second region Rb. By satisfying the relationship between the heights hA and hB as described above, the workability when housing the functional parts 20 and the sensing sensitivity of the functional parts 20 can be improved in a well-balanced manner.

[0029] 1 to 5, the second region Rb is located at the center of the bottom 11, the sensor element 22 (piezoelectric element) is also located at the center of the bottom of the functional component 20, and the diameter of the sensor element 22 is configured to be larger than the diameter of the second region Rb. In this case, the projection region Rc formed by projecting the sensor element 22 onto the outer surface of the housing 23 includes the second region Rb as shown in Fig. 5. That is, the second region Rb and the projection region Rc of the sensor element 22 overlap each other.

[0030] In an unloaded state and with the functional component 20 housed in the housing 10, as described above, it is preferable that at least a portion of the second region Rb overlaps with the projection region Rc of the sensor element 22 (piezoelectric element). In this case, the second region Rb is located in a region below the sensor element 22. By arranging the second region Rb and the projection region Rc of the sensor element 22 in this manner, good contact between the second region Rb and the piezoelectric element is maintained, and therefore the sensing sensitivity of the functional component 20 can be improved.

[0031] With the above arrangement relationship being satisfied, the area Sd [mm 2 ] is the area Sc [mm 2 ] is preferably 10% to 150%, and more preferably 40% to 100%. By satisfying such a relationship, it is possible to ensure sufficient output from the piezoelectric element, thereby enhancing the sensing sensitivity of the functional component 20.

[0032] Here, after the functional part 20 is accommodated, the second region Rb is pressed against the sensor element 22 (piezoelectric element) or the housing 23 due to the elasticity of the accommodation body 10, but if the overlapping area Sd of the second region Rb and the projection area Rc of the piezoelectric element is excessively large compared to the area Sc of the projection area Rc, the pressure due to the rolling of the tire is dispersed to areas other than the sensor element 22, which may reduce the sensing sensitivity of the piezoelectric element. Conversely, if the overlapping area Sd of the second region Rb and the projection area Rc of the piezoelectric element is excessively small compared to the area Sc of the projection area Rc, the sensing sensitivity of the functional part 20 cannot be sufficiently increased.

[0033] In the present invention, the planar shape and thickness of the second region Rb are not particularly limited. In particular, the planar shape of the second region Rb may be appropriately changed so as to correspond to the planar shape of the sensor element 22. In addition to the form in which the second region Rb has a circular planar shape and the thickness of the second region Rb is equal to that of the first region Ra as shown in FIG. 2, the second region Rb may have a circular planar shape and the thickness of the second region Rb is thinner than that of the first region Ra as shown in FIG. 7(a), the second region Rb may have a planar shape with four extensions extending radially from a circular center portion and the thickness of the second region Rb is equal to that of the first region Ra as shown in FIG. 7(b), the second region Rb may have an annular planar shape and the thickness of the second region Rb is thinner than that of the first region Ra as shown in FIG. 7(c), and the second region Rb may have a circular planar shape and the thickness of the second region Rb is thinner than that of the first region Ra as shown in FIG. 7(d). Furthermore, the center position of the second region Rb does not necessarily have to coincide with the center position of the bottom portion 11 of the container 10.

[0034] Fig. 8 shows a pneumatic tire in which a container with functional parts is fixed to the inner surface of the tire. As shown in Fig. 8, the pneumatic tire has a tread portion 1 extending in the circumferential direction of the tire to form an annular shape, a pair of sidewall portions 2, 2 disposed on both sides of the tread portion 1, and a pair of bead portions 3, 3 disposed on the inner side of the sidewall portions 2 in the radial direction of the tire.

[0035] A carcass layer 4 is fitted between a pair of bead portions 3, 3. This carcass layer 4 includes a plurality of reinforcing cords extending in the tire radial direction, and is folded back from the inside to the outside of the tire around a bead core 5 arranged in each bead portion 3. A bead filler 6 made of a rubber composition having a triangular cross section is arranged on the outer periphery of the bead core 5.

[0036] On the other hand, a plurality of belt layers 7 are embedded on the outer peripheral side of the carcass layer 4 in the tread portion 1. These belt layers 7 include a plurality of reinforcing cords inclined with respect to the tire circumferential direction, and are arranged so that the reinforcing cords cross each other between the 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°. As the reinforcing cords of the belt layers 7, steel cords are preferably used. On the outer peripheral side of the belt layers 7, at least one belt cover layer 8 is arranged in which 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. As the reinforcing cords of the belt cover layer 8, organic fiber cords such as nylon and aramid are preferably used.

[0037] It should be noted that the above-described tire internal structure shows a typical example of a pneumatic tire, but is not limited thereto.

[0038] In the above pneumatic tire, a container 10 that houses a functional part 20 having a sensor function for detecting tire information is installed on the back surface of the tread portion 1. Such a container with functional part can be fixed to the back surface of the tread portion 1 of the tire by, for example, an adhesive. EXAMPLES

[0039] The tire size is 185 / 65R15. The tire is equipped with a functional part having a sensor function for detecting tire information and a housing in which the functional part is housed. The structure of material A (modulus M 50a , height hA), composition of material B (modulus M 50b , tensile modulus Et b , height hB), ratio Sb / S, ratio M 50b / M 50a Tires of Comparative Examples 1 to 3 and Examples 1 to 7 were manufactured with the values ​​of hA-hB and occupancy set as shown in Table 1. The functional parts had a sensor function using a piezoelectric element as the sensor element, and the functional parts were attached to the back surface of the tread portion via a container.

[0040] In Comparative Examples 1 to 3, the entire housing is made of material A (vulcanized rubber), whereas in Examples 1 to 7, the bottom surface of the housing includes a first region made of material A and a second region made of material B, and the portions other than the bottom surface are made of material A. Furthermore, in Examples 1 to 7, the second region is located in the center of the bottom of the housing, and in Comparative Examples 1 to 3 and Examples 1 to 7, the piezoelectric element is located in the center of the bottom of the functional component.

[0041] In Table 1, "occupancy rate (Sd / Sc × 100)" means the ratio [%] of the area (Sd) of the overlap between the second region and the projection region of the piezoelectric element to the area (Sc) of the projection region formed by projecting the piezoelectric element onto the outer surface of the housing of the functional component when the functional component is housed in the housing and in an unloaded state.

[0042] These test tires were evaluated for workability during storage and sensing sensitivity by the following test methods. The results are shown in Table 1.

[0043] Ease of use when contained: For each test tire, the task of housing the functional parts in the housing was repeated 10 times, and the average time required for the housing task was calculated. The evaluation results were expressed as an index using the reciprocal of the calculated value, with Comparative Example 1 being set at 100. The higher the index value, the better the workability during housing.

[0044] Sensing Sensitivity: Each test tire was mounted on a wheel with a rim size of 15×5.5 and attached to a drum testing machine, and a running test was performed with an air pressure of 230 kPa, a load of 60% of the maximum load capacity, and a speed of 30 km / h, and the output detected by the sensor element (piezoelectric element) was recorded. FIG. 9 shows an example of an output waveform from a piezoelectric element. In this output waveform, when a part where a functional part is installed in the tread part touches the ground, a negative peak and a positive peak are formed in sequence in the output of the piezoelectric element with the passage of time T, and a peak-to-peak value V is obtained. Then, the average value of the peak-to-peak values ​​V of the output waveform obtained in each of the 10 measurements was calculated. The evaluation results were shown as an index with the average value of the peak-to-peak values ​​V of the output waveform being 100. The larger the index value, the better the sensing sensitivity. Such sensing sensitivity was evaluated.

[0045] [Table 1]

[0046] As can be seen from Table 1, in comparison with Comparative Example 1, the tires of Examples 1 to 7 were able to improve the workability during storage and the sensing sensitivity.

[0047] On the other hand, in Comparative Example 2, the material A constituting the container has a modulus M 50a In Comparative Example 3, the material A constituting the container had a relatively high modulus M 50a The vulcanized rubber had a relatively low resistance, which reduced the sensing sensitivity.

[0048] The present disclosure includes the following inventions [1] to

[10] . Invention [1] is a container with functional part, comprising a functional part having a sensor function for detecting tire information and a container in which the functional part is housed, the container having a housing section for housing the functional part, an opening communicating with the housing section for inserting and removing the functional part, and a bottom section parallel to the opening section and including a plane that comes into contact with the functional part when the functional part is housed, the bottom section having a first region made of an elastic material A and a second region made of a material B harder than material A. Invention [2] is a container with functional parts according to invention [1], characterized in that the area S of the bottom surface of the container and the area Sb of the second region satisfy the relationship 0.01≦Sb / S≦0.50. The invention [3] is a rubber or elastomer having elasticity, and the modulus M of the material A at 50% elongation 50a [MPa] and the modulus M of material B at 50% elongation 50b [MPa] and 1.2≦M 50b / M 50a The functional part-equipped container according to the invention [1] or [2] is characterized in that it satisfies the relationship of ≦10.0. The invention [4] is the tensile modulus Et b The functional part-equipped container according to the invention [1] or [2] is characterized in that the compressive strength is in the range of 100 MPa to 100,000 MPa. Invention [5] is a container with functional parts described in any one of inventions [1] to [4], characterized in that a height hA [mm] from the bottom to the opening in the first region and a height hB [mm] from the bottom to the opening in the second region satisfy the relationship 0 mm≦hA-hB≦2 mm. Invention [6] is a container with functional components according to any one of inventions [1] to [5], characterized in that the functional components have a housing incorporating an electronic component and at least one film-shaped piezoelectric element fixed to a wall surface of the housing, and in an unloaded state and when the functional components are contained in the container, at least a part of the second region overlaps with a projected region formed by projecting the piezoelectric element onto the outer surface of the housing. Invention [7] is a container with functional parts described in invention [6], characterized in that the overlapping area between the second region and the projection area of ​​the piezoelectric element is 10% to 150% of the area of ​​the projection area of ​​the piezoelectric element. Invention [8] is a container with functional parts described in any one of inventions [1] to [7], characterized in that the container is fixed to the back surface of the tread portion and the functional parts are contained in the container. Invention [9] is a container with functional parts according to invention [8], characterized in that the container is fixed to the back surface of the tread portion by an adhesive. Invention

[10] is a tire characterized in that a functional part-equipped container according to any one of inventions [1] to [9] is fixed to an inner surface of the tire, and the functional part is contained in the container. [Explanation of symbols]

[0049] 1 Tread section 2 Sidewall 3 Bead section 10 Containment Unit 11 Bottom 11x bottom 12 Side wall 13 Storage unit 14 Openings 20 Functional parts Ra first area Rb second area

Claims

1. A container with functional parts, the container including a functional part having a sensor function for detecting tire information and a container for accommodating the functional part, the container has a housing portion for housing the functional component, an opening portion communicating with the housing portion and for inserting and removing the functional component, and a bottom portion including a flat surface parallel to the opening portion and contacting the functional component when the functional component is housed therein; A container with functional parts, wherein the bottom portion has a first region made of an elastic material A and a second region made of a material B harder than the material A.

2. 2. The container with functional parts according to claim 1, wherein an area S of the bottom surface of the container and an area Sb of the second region satisfy a relationship of 0.01≦Sb / S≦0.

50.

3. The material B is a rubber or elastomer having elasticity, and the modulus M of the material A at 50% elongation is 50a [MPa] and the modulus M of the material B at 50% elongation 50b [MPa] is 1.2≦M 50b / M 50a 2. The container with functional parts according to claim 1, wherein the relationship is satisfied: ≦10.

0.

4. Tensile modulus Et of material B b 2. The container with functional parts according to claim 1, wherein the compressive strength is in the range of 100 MPa to 100,000 MPa.

5. The container with functional parts as described in claim 1, characterized in that a height hA [mm] from the bottom to the opening in the first region and a height hB [mm] from the bottom to the opening in the second region satisfy the relationship 0 mm≦hA-hB≦2 mm.

6. the functional component has a housing that houses an electronic component and at least one film-like piezoelectric element fixed to a wall surface of the housing, A container with functional parts as described in claim 1, characterized in that when the functional part is contained in the container in an unloaded state, at least a portion of the second area overlaps with a projection area formed by projecting the piezoelectric element onto the outer surface of the housing.

7. 7. The container with functional parts according to claim 6, wherein an overlapping area between the second region and the projection region of the piezoelectric element is 10% to 150% of an area of ​​the projection region of the piezoelectric element.

8. 2. The container with functional parts according to claim 1, wherein the container is fixed to a back surface of the tread portion, and the functional parts are contained in the container.

9. 9. The container with functional parts according to claim 8, wherein the container is fixed to the back surface of the tread portion by an adhesive.

10. A tire, comprising: a functional part-equipped container according to any one of claims 1 to 9; fixed to an inner surface of the tire; and the functional part is contained in the container.

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