Fitting assembly

Abstract

To provide a fitting assembly in which case displacement with respect to a container is difficult to occur even when shocks are received.SOLUTION: This fitting assembly comprises: a container including a wall part forming a hollow storage part opened in a first direction and a fitting part connected to the end of the wall part in the first direction and fitted to a fitted part; and a case that holds the storage part in contact with the inner wall of the wall part. A rough sectional shape of the wall part in the first direction is a polygon in which the inner angles of all apexes are less than 180°. The inner wall has a side region corresponding to a center excluding 25% of both ends of each side of the polygon and a connection region including a region other than the side region. A first contact force F1 of the case with respect to the side region and a second contact force F2 of the case with respect to the connection region satisfy the following expression 1. 0.5≤F1 / F2≤2.5 (1).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a mounting assembly that is installed on a member that is in an environment where high impacts may occur, such as the inside surface of a tire. [Background technology]

[0002] Patent Document 1 discloses an electronic device used in a technology for detecting the condition of a tire by providing a functional component (module) that integrates a pressure sensor, a temperature sensor, a battery or power generation element, a radio, etc. inside the tire. The electronic device has a module for detecting the condition of the tire and a base that is attached to the inside surface of the tire and has a storage section in which the module is stored, and is characterized in that the external shape of the module and the shape of the storage section are set so that the center of gravity of the external shape of the module stored in the storage section in a planar view is offset from the center of gravity of the cross-sectional shape of the storage section of the base in a planar view. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-142380 Summary of the Invention [Problem to be solved by the invention]

[0004] In the electronic device disclosed in Patent Document 1, the center of gravity of the module's external shape in a planar view is offset from the center of gravity of the cross-sectional shape of the base's housing section in a planar view, thereby preventing the module from rotating within the housing section. However, displacing the center of gravity in this way results in the module being "unevenly abutted" against the housing, which essentially results in a lack of uniformity in the module's retention in the housing. Therefore, if the module receives a strong impact from a mounting member such as a tire, and an external force that displaces the module in an area with relatively low retention force is applied to the module, there is a concern that the module may be displaced relative to the housing, resulting in the module becoming misaligned with the tire. Recently, there has been a growing demand for electronic components, such as sensors for measuring tire wear, to be particularly resistant to misalignment with the tire. The structure disclosed in Patent Document 1 may not be able to meet such high-level demands.

[0005] The present invention aims to provide a mounting assembly comprising a case for accommodating electronic components or the like and a container for holding the case, in which the case is less likely to be displaced relative to the container even when subjected to an impact through the member to which it is attached. [Means for solving the problem]

[0006] The present invention, provided to solve the above-mentioned problems, in one aspect is an attachment assembly comprising a container having a wall portion forming a hollow storage portion that opens in a first direction, and an attachment portion that is connected to the end of the wall portion in the first direction and is for attachment to a member to be attached, and a case that is held in the storage portion in contact with the inner wall of the wall portion, wherein the cross-sectional shape of the wall portion when viewed from the first direction is roughly a polygon in which the interior angles of all vertices are less than 180°, and the inner wall has a side region that is an area corresponding to a central portion excluding 25% of both ends of each side of the polygon, and a connection region consisting of the area other than the side region, and wherein a first contact force F1 that is the contact force of the case against the side region and a second contact force F2 that is the contact force of the case against the connection region satisfy the following formula (1). 0.5≦F1 / F2≦2.5 (1)

[0007] By satisfying the above formula (1), even if the mounting assembly is placed in an environment where it is susceptible to impact (for example, inside a tire), the case held in the storage section of the container is unlikely to shift position. Since the cross-sectional shape of the container wall is roughly polygonal and satisfies the above formula (1), the cross-sectional shape of the case as viewed from the first direction is also roughly polygonal. Therefore, the case is unlikely to rotate around the first direction.

[0008] Furthermore, since the above formula (1) is satisfied, the container is likely to be in contact with the case over the entire inner wall and hold the case in place. In contrast, if the above formula (1) is not satisfied, the case will be in localized contact with the inner wall, which is likely to result in areas of relatively low holding force. In this state, when an external force is applied in a direction that displaces the case in the areas of low holding force, there is a risk of the case being displaced relative to the container. Furthermore, when F1 / F2 is less than 0.5, the case will preferentially contact the connection area, which tends to increase contact pressure at ridges where adjacent surfaces of the case overlap, raising concerns about the container breaking.

[0009] In another aspect, the present invention provides an attachment assembly comprising a container having a wall portion forming a hollow storage portion that opens in a first direction, and an attachment portion that is connected to the end of the wall portion in the first direction and is for attachment to a member to be attached, and a case that is held in the storage portion in contact with the inner wall of the wall portion, wherein the cross-sectional shape of the wall portion when viewed from the first direction is roughly a polygon in which the interior angles of all vertices are less than 180°, and the inner wall has a side region that is an area corresponding to a central portion excluding 25% of both ends of each side of the polygon, and a connection region that is an area other than the side region, and wherein a first contact force F1 that is the contact force of the case against the side region and a second contact force F2 that is the contact force of the case against the connection region satisfy the following formula (2). F1>F2 (2)

[0010] In this case, the first contact force F1 is greater than the second contact force F2, i.e., the contact force is lower in the connection area than in the side area, so that the contact pressure is less likely to be excessive in the connection area, and therefore the container is less likely to break due to contact with the case.

[0011] In the above mounting assembly, it may be preferable that the side region has a protrusion that protrudes toward the case and contacts the case. Contacting the case at the protrusion makes it easy to increase the first contact force F1. Furthermore, when F1 / F2 is adjusted by providing the protrusion, the degree of freedom in the shape of the container or case may be increased.

[0012] It is more preferable that the above mounting assembly satisfies the following formula (3). 1.0 <F1 / F2≦2.5 (3) When the above formula (3) is satisfied, the contact force is lower in the connection area, and therefore the contact pressure is less likely to become locally high in the connection area.

[0013] In a mounting assembly that satisfies the above formula (1), it is preferable that the side region consists of a plurality of partial side regions separated by the connection region, the connection region consists of a plurality of partial connection regions separated by the side region, and a first partial contact force F1p, which is the contact force of the case against one of the partial side regions, and a second partial contact force F2p, which is the contact force of the case against one of the partial connection regions adjacent to one of the partial side regions, satisfy the following formula (4). 0.5≦F1p / F2p≦2.0 (4) When adjacent partial side surface regions and partial connection regions individually satisfy the above formula (4), the contact variation of the case with the inner wall is further reduced, and the occurrence of misalignment can be more stably suppressed.

[0014] It is preferable that the mounting assembly that satisfies the above formula (2) also satisfies the following formula (5). F1p>F2p (5) By having adjacent partial side regions and partial connection regions individually satisfy the above formula (5), the contact variation of the case with the inner wall is reduced, and the occurrence of container breakage due to contact with the case can be more stably suppressed.

[0015] It is more preferable that the above mounting assembly satisfies the following formula (6). 1.0 <F1p / F2p≦2.5 (6) When the above formula (6) is satisfied, the contact force is lower in the partial connection region, and therefore the contact pressure is less likely to become locally high in a part of the connection region.

[0016] In the mounting assembly, the housing portion may be open on one side in the first direction and closed on the other side in the first direction. In this case, the end portion to which the mounting portion is connected may be an open end of the wall portion or a closed end of the wall portion.

[0017] In the above mounting assembly, the case may house an electronic component, and in this case, specific examples of the electronic component include a sensor element, an energy harvesting element, and an actuator element.

[0018] In another aspect, the present invention provides a tire sensing module that includes a mounting assembly having a case that houses electronic components. [Effects of the Invention]

[0019] The present invention provides a mounting assembly that is less susceptible to displacement of the case relative to the container upon impact. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a perspective view showing an example of a mounting assembly according to a first embodiment of the present invention; [Figure 2] FIG. 2 is an exploded perspective view of the mounting assembly shown in FIG. 1. [Figure 3] 3 is an XY cross-sectional view taken along line AA' in FIG. 2. [Figure 4] FIG. 4 is an XZ cross-sectional view taken along line BB' in FIG. [Figure 5] 4 is a YZ cross-sectional view taken along line CC' in FIG. 3. [Figure 6] FIG. 10 is a perspective view showing an example of a mounting assembly according to a second embodiment of the present invention. [Figure 7] 7 is a view of the mounting assembly shown in FIG. 6 from the opposite side in the Z direction. [Figure 8] FIG. 10 is an illustration of a container of a mounting assembly according to an example of the second embodiment. [Figure 9A] FIG. 10 is an explanatory view of a container of a mounting assembly according to a first modified example of the second embodiment. [Figure 9B] FIG. 10 is an explanatory view of a container of a mounting assembly according to a second modified example of the second embodiment. [Figure 9C] FIG. 10 is an explanatory view of a container of a mounting assembly according to a third modified example of the second embodiment. [Figure 10] 10 is an explanatory diagram of a mounting assembly according to another example of the first embodiment of the present invention, which is used as a model in Example 1. FIG. [Figure 11] FIG. 10 is a diagram illustrating a model of a case used in a simulation of an example. [Figure 12] 10 is an explanatory diagram of a mounting assembly according to another example of the second embodiment of the present invention, which is used as a model in Example 2. FIG. [Figure 13] FIG. 10 is a diagram showing a simulation result of Comparative Example 1. [Figure 14] FIG. 10 is a diagram showing a simulation result of the first embodiment. [Figure 15] FIG. 10 is a diagram showing a simulation result of Comparative Example 2. [Figure 16] FIG. 10 is a diagram showing a simulation result of Example 2. [Figure 17A] FIG. 1 is a front view of an example mounting assembly according to a first embodiment of the present invention. [Figure 17B] FIG. 2 is a right side view of an example mounting assembly according to a first embodiment of the present invention. [Figure 17C]FIG. 1 is a front view of an example mounting assembly according to a first embodiment of the present invention. [Figure 17D] FIG. 2 is a bottom view of an example mounting assembly according to the first embodiment of the present invention. [Figure 18] FIG. 2 is an explanatory diagram of a tire sensing module according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] (First embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the same components are denoted by the same reference numerals, and the description of components that have already been described will be omitted as appropriate.

[0022] Fig. 1 is a perspective view showing an example of a mounting assembly according to a first embodiment of the present invention. Fig. 2 is an exploded perspective view of the mounting assembly shown in Fig. 1. Fig. 3 is an XY cross-sectional view taken along line A-A' in Fig. 2. Fig. 4 is an XZ cross-sectional view taken along line B-B' in Fig. 3. Fig. 5 is a YZ cross-sectional view taken along line CC' in Fig. 3.

[0023] As shown in FIGS. 1 and 2, a mounting assembly 100 according to a first embodiment of the present invention comprises a container 10 and a case 20 housed in the container.

[0024] The container 10 is formed from an elastic material such as rubber or elastomer, and has a wall 11 that forms a hollow storage section 14 that opens to the Z1 side in the Z1-Z2 direction (first direction), and a mounting section 12 for mounting to a support member. The mounting section 12 is connected to one end of the wall 11 in the first direction, specifically, a closed end 112 that is the end on the Z2 side in the Z1-Z2 direction. The opening of the storage section 14 only needs to be open enough to allow the case 20 to be inserted into the storage section 14. In the mounting assembly 100 according to this embodiment, an overhanging portion 13 that partially blocks the opening of the storage section 14 is provided at the open end 111, which is the end on the Z1 side in the Z1-Z2 direction of the wall 11, in order to stabilize the retention of the case 20 placed inside the storage section 14 and prevent it from falling out.

[0025] A bottom 17 is connected to the closed end 112 (the end of the wall 11 in the Z1-Z2 direction) which is the end opposite to the open end 111 of the wall 11, and completely closes the Z2 side of the storage section 14 in the Z1-Z2 direction. The Z2 side of the bottom 17 in the Z1-Z2 direction and the Z2 side of the mounting section 12 in the Z1-Z2 direction form a continuous surface, and this surface serves as the mounting surface for the mounting base. The bottom 17 may have a through hole in the Z1-Z2 direction, in which case the Z2 side of the storage section 14 in the Z1-Z2 direction is partially open.

[0026] In this embodiment, case 20 has the general shape of an octagonal prism having a substantially octagonal bottom surface 21 with the first direction as its normal line and eight side surfaces 22. The octagon of bottom surface 21 has a four-fold symmetric shape with the first direction as its axis of rotation. Case 20 according to this embodiment has smooth corners and ridges to prevent excessive pressure from being generated at these parts.

[0027] Of the side surfaces 22, the side surface located on the Y2 side in the Y1-Y2 direction as viewed in the Z1-Z2 direction is defined as the first side surface 221, and thereafter, the side surfaces are defined as the second side surface 222 to the eighth side surface 228 in a clockwise direction as viewed from the Z1 side to the Z2 side in the Z1-Z2 direction. As described above, since the bottom surface 21 has a four-fold symmetric shape with the first direction as the axis of rotation, the first side surface 221 and the fifth side surface 225 are parallel to the XZ plane and face each other in the Y1-Y2 direction, and the third side surface 223 and the seventh side surface 227 are parallel to the YZ plane and face each other in the X1-X2 direction. The second side surface 222 and the sixth side surface 226 are parallel, and the fourth side surface 224 and the eighth side surface 228 are parallel.

[0028] The case 20 is made of, for example, an epoxy resin containing a filler, and contains components such as electronic components inside. Specific examples of electronic components include a sensor element, an energy harvesting element, and an actuator element. Specific examples of sensor elements include an acceleration sensor, a pressure sensor, a displacement (deformation) sensor, and a magnetic sensor. The case 20 may further include a semiconductor device for controlling these elements, or may include a charge / discharge component (a rechargeable battery). The charge / discharge component (a rechargeable battery) serves as a power source for driving the sensor element or actuator element, or stores electrical energy generated by the energy harvesting element.

[0029] The shape of the storage section 14 of the container 10 corresponds to the shape of the case 20. The inner wall 15 and the bottom 17 of the wall section 11 of the container 10 are positioned so that the Z1 side in the Z1-Z2 direction faces the case 20, and the case 20 is held in the storage section 14 in contact with the inner wall 15. Specifically, the frictional force based on the contact force between the case 20 and the inner wall 15 suppresses displacement of the case 20 within the storage section 14.

[0030] The general shape of the cross section of wall portion 11 as viewed from the first direction (Z1-Z2 direction) is a polygon in which the interior angles of all vertices are less than 180°; specifically, it is an octagon with eight sides as indicated by the thick imaginary lines in FIG. 3. Hereinafter, this polygon will be referred to as general polygon S1. The sides of general polygon S1 are defined as first side L1 to eighth side L8, corresponding to first side surface 221 to eighth side surface 228. It may be preferable that the interior angles of general polygon S1 be right angles or obtuse angles, and in some cases obtuse angles are more preferable.

[0031] Here, the inner wall 15 is divided into a side region R1 and a connection region R2. The side region R1 is a region corresponding to the center of each of the sides (first side L1 to eighth side L8) of the general polygon S1 (octagon) excluding 25% of each end. The connection region R2 is the region other than the side region R1.

[0032] Explaining this in detail with reference to Figure 3, the central portion of the first side L1, excluding 25% of each end, has a width w11 that is half the width w1 of the first side L1. In the inner wall 15, the region corresponding to this central portion of the first side L1 is the first partial side region R11. Similarly, the second partial side region R12 to the eighth partial side region R18 are defined, and the side region R1 is defined as a collective term for these.

[0033] On the other hand, on the inner wall 15, a first partial connection region R21 is formed by a region R211 corresponding to a portion on the X2 side in the X1-X2 direction from the center of the first side L1 (25% of the portion including the end) and a region R212 corresponding to a portion on the X1 side in the X1-X2 direction from the center of the first side L1 (25% of the portion including the end). Similarly, an eighth partial connection region R28 (region R281+region R282) is defined from the second partial connection region R22 (region R221+region R222), and these are collectively defined as the connection region R2.

[0034] In this embodiment, a first contact force F1, which is the contact force of the case 20 on the side surface region R1, and a second contact force F2, which is the contact force of the case 20 on the connection region R2, satisfy the following formula (1). 0.5≦F1 / F2≦2.5 (1)

[0035] By satisfying the above formula (1), even if the mounting assembly 100 is placed in an environment where it is susceptible to impacts (for example, inside a tire), the case 20 held in the storage section 14 of the container 10 is unlikely to shift position. The general shape of the cross-sectional shape of the wall 11 of the container 10 in the XY plane (a plane normal to the first direction) is a polygon (general polygon S1, in this example, an octagon) and satisfies the above formula (1). Therefore, the general shape of the cross-sectional shape of the case 20 as seen from the first direction, i.e., the cross-sectional shape in the XY plane normal to the first direction, is also a polygon. Therefore, the case 20 inside the container 10 is unlikely to rotate around the first direction.

[0036] Furthermore, since the above formula (1) is satisfied, the container 10 is likely to be in a state where the entire inner wall 15 contacts the side surface 22 of the case 20 and holds the case 20. In contrast, if the above formula (1) is not satisfied, the case 20 will be in local contact with the inner wall 15, and it is likely that there will be an area on the inner wall 15 where the holding force for the case 20 is relatively low. In this state, when an external force is applied in a direction that displaces the case 20 in the area of ​​the inner wall 15 where the holding force is low, there is a risk that the case 20 will be displaced relative to the container 10. Furthermore, when F1 / F2 is less than 0.5, the case 20 will particularly preferentially contact the connection region R2, and therefore contact pressure is likely to increase at the ridge portion where adjacent faces of the case 20 overlap and at the vertex portion corresponding to the intersection of three faces, raising concerns about the container breaking.

[0037] As another embodiment of the present invention, the first contact force F1 and the second contact force F2 may satisfy the following formula (2) instead of the above formula (1). F1>F2 (2)

[0038] In this case, the first contact force F1 is greater than the second contact force F2, i.e., the contact force is lower in the connection region R2 than in the side region R1, so that the contact pressure is less likely to be excessive in the connection region R2, and therefore the container 10 is less likely to break due to contact with the case 20.

[0039] From the viewpoint of stably satisfying the above formula (1) and / or formula (2), it may be preferable that the side region R1 have a protrusion 16 that protrudes toward the case 20 and contacts the case 20. In the mounting assembly 100 according to this embodiment, the protrusion 16 is composed of a plurality of cylindrical pin-shaped protrusions 16p with hemispherical tips. In this embodiment, a group of pin-shaped protrusions 16p is arranged on a flat portion of the inner wall 15 corresponding to the sides of the general polygon S1 to form the protrusion 16. The protrusion height of the group of pin-shaped protrusions 16p is not uniform, but is configured so that the protrusion height of the group of pin-shaped protrusions 16p closer to the center of the flat portion is greater. This relatively increases the contact force of the side region R1, i.e., makes it easier to satisfy the above formula (2).

[0040] In this embodiment, as a specific example, among the multiple protrusions 16 arranged on the inner wall 15 corresponding to each side of the general polygon S1, the protrusions 16 corresponding to the third side L3 and the seventh side L7 have three pin-shaped protrusions 16p aligned in the circumferential direction. Meanwhile, the protrusions 16 corresponding to the other sides of the general polygon S1 have five pin-shaped protrusions 16p aligned in the circumferential direction. In each protrusion 16, five pin-shaped protrusions 16p are aligned in the Z1-Z2 direction, and the protrusions 16p closer to the center of the inner wall 15 in the Z1-Z2 direction have a higher protrusion height.

[0041] By contacting the protrusion 16 of the container 10 with the case 20 in this manner, it is easy to increase the first contact force F1. Furthermore, when F1 / F2 is adjusted by providing the protrusion 16, the degree of freedom in the shape of the container 10 or the case 20 may be increased. That is, the shape of the container 10 as viewed from the first direction may be limited to a predetermined shape depending on the shape of the attached member. Furthermore, the shape of the case 20 as viewed from the first direction may be limited by the shape and number of components (such as elements, semiconductor devices, and storage batteries) housed in the case 20. Even when the container 10 or the case 20 has such shape constraints, by appropriately setting the shape of the protrusion 16, the relationship between the first contact force F1 and the second contact force F2 can be set within a predetermined range without imposing any further shape constraints on the container 10 or the case 20.

[0042] When the mounting assembly 100 satisfies the above formula (1), it is more preferable that the following formula (3) be satisfied. 1.0 <F1 / F2≦2.5 (3)

[0043] When the above formula (3) is satisfied, the contact force (second contact force F2) in the connection region R2 is lower than the contact force (first contact force F1) in the connection region R2, and therefore the contact pressure is unlikely to become locally high in the connection region R2, which includes the portions corresponding to the vertices of the general polygon S1. If the contact force (second contact force F2) in the connection region R2 is excessively high, the contact pressure may become particularly high at the ridges and vertices of the case 20. In this case, there is a concern that the container 10 may be damaged.

[0044] In the mounting assembly 100 according to this embodiment, the side region R1 is made up of a plurality of partial side regions R1i separated by connecting regions R2. Specifically, as shown in Fig. 3, the side region R1 is made up of a first partial side region R11 to an eighth partial side region R18 corresponding to each side (first side L1 to eighth side L8) of the general polygon S1.

[0045] On the other hand, the connection region R2 is made up of a plurality of partial connection regions R2i separated by side region R1. Specifically, as shown in Fig. 3, the connection region R2 is made up of a first partial connection region R21 (= region R211+region R212) to an eighth partial connection region R28 (= region R281+region R282) corresponding to each side (first side L1 to eighth side L8) of the general polygon S1.

[0046] It is preferable that the first partial contact force F1p, which is the contact force of the case 20 against one of the partial side regions R1i, and the second partial contact force F2p, which is the contact force of the case 20 against one partial connection region R2i adjacent to one partial side region R1i (consisting of two regions sandwiching the partial side region R1i), satisfy the following formula (4). 0.5≦F1p / F2p≦2.0 (4)

[0047] When the adjacent partial side area R1i and partial connection area R2i satisfy the above formula (4), the contact variation of the case 20 with the inner wall 15 is reduced, and the occurrence of positional displacement of the case 20 inside the storage section 14 of the container 10 can be more stably suppressed.

[0048] When the mounting assembly 100 satisfies the above formula (2), it is preferable that the following formula (5) be satisfied. F1p>F2p (5)

[0049] By having adjacent partial side regions R1i and partial connection regions R2i individually satisfy the above formula (5), the contact variation of the case 20 with the inner wall 15 is reduced, and the occurrence of breakage of the container 10 due to contact with the case 20 can be more stably suppressed.

[0050] It is more preferable that the mounting assembly 100 that satisfies the above formula (4) and / or the above formula (5) satisfies the following formula (6). 1.0 <F1p / F2p≦2.5 (6)

[0051] When the above formula (6) is satisfied, the contact force (second partial contact force F2p) of the partial connection region R2i is lower than the contact force (first partial contact force F1p) of the partial side surface region R1i, and therefore the contact pressure is unlikely to become locally high in the partial connection region R2i including the portion corresponding to the vertex of the general polygon S1. If the contact force (second partial contact force F2p) of the partial connection region R2i is excessively high, the contact pressure may become particularly high at the ridge and vertex of the case 20 corresponding to the partial connection region R2i. In this case, there is a concern that the container 10 may be damaged.

[0052] Figure 17A is a front view of an example of a mounting assembly according to a first embodiment of the present invention. Figure 17B is a right side view of an example of a mounting assembly according to a first embodiment of the present invention. Figure 17C is a front view of an example of a mounting assembly according to a first embodiment of the present invention. Figure 17D is a bottom view of an example of a mounting assembly according to a first embodiment of the present invention. The front view and the back view are identical, and the right side view and the left side view are identical.

[0053] (Second embodiment) Fig. 6 is a perspective view showing an example of a mounting assembly according to a second embodiment of the present invention. Fig. 7 is a view of the mounting assembly shown in Fig. 6 as seen from the opposite side in the Z direction. Fig. 8 is an explanatory view of a container of the mounting assembly according to an example of the second embodiment.

[0054] A mounting assembly 110 according to a second embodiment of the present invention, shown in FIGS. 6 and 7, includes a container 30 and a case 20 held in the storage section 34 of the container 30, similar to the mounting assembly 100 according to the first embodiment. The container 30 of the mounting assembly 110 has the same structure as the container 10 of the mounting assembly 100, in that a flange-shaped mounting portion 32 extends in the XY plane from one end of a wall portion 31 standing upright in the first direction. However, the mounting portion 32 is provided on the open end 311 of the wall portion 31, rather than on the closed end 312 where the bottom portion 37 is provided. In other words, the container 30 of the mounting assembly 110 has a hat-like general shape. This hat-like shape makes it less likely for the container 30 to fall off the case 20, even if the holding force of the case 20 for the container 30 is reduced. As in the first embodiment, the bottom portion 37 may have a through-hole in the Z1-Z2 direction. In this embodiment, if the bottom 37 is completely closed, the accommodation section 34 of the mounting assembly 110 becomes a closed space. Therefore, it may be preferable to provide a through-hole in the bottom 37 so that the accommodation section 34 is in communication with the outside air. A specific example of such a case is when the components housed in the case 20 include a pressure sensor element.

[0055] The cross-sectional shape of the wall portion 31 of the container 30 viewed from the first direction is roughly octagonal, similar to the mounting assembly 100 according to the first embodiment. Also, similar to the container 10, the container 30 has a protrusion 36 on the inner wall 35. When the side region R1 and the connection region R2 are defined on the inner wall 35 of the wall portion 31, at least one of the above formula (1) and (2) is satisfied, preferably the above formula (3) is satisfied, and further, when the partial side region R1i and the partial connection region R2i are defined, at least one of the above formula (4) and (5) is preferably satisfied, and more preferably the above formula (6) is satisfied, as in the first embodiment, and therefore detailed description thereof will be omitted.

[0056] Fig. 9A is an explanatory diagram of a container of a mounting assembly according to a modified example (part 1) of the second embodiment. Fig. 9B is an explanatory diagram of a container of a mounting assembly according to a modified example (part 2) of the second embodiment. Fig. 9C is an explanatory diagram of a container of a mounting assembly according to a modified example (part 3) of the second embodiment. In these figures, for ease of explanation of the shapes of protrusions 361 to 363, a portion of container 301 to container 303 is shown cut along a plane including the first direction (Z1-Z2 direction).

[0057] 9A to 9C, the protrusion 36 can have various shapes. In the container 301 shown in Fig. 9A, the protrusion 361 has a shape in which the entire portion of the inner wall 35 facing the side surface 22 protrudes, with the center protruding the most, so as to preferentially contact the center of each of the side surfaces 22 (first side surface 221 to eighth side surface 228) of the case 20. Therefore, the protrusion 361 has an overall shape similar to that of the group of pin-shaped protrusions 36p shown in Fig. 8.

[0058] 9B, the protrusion 362 is provided on the inner wall 35 at a portion facing the side surface 22, and has a structure in which a plurality of pyramidal cone-shaped protrusions 362p are arranged. Similar to the overall shape of the group of pin-shaped protrusions 36p, the overall shape of the group of cone-shaped protrusions 362p becomes higher as it approaches the portion facing the center of each of the side surfaces 22 of the case 20 (first side surface 221 to eighth side surface 228).

[0059] 9C, the protrusion 363 is provided on the inner wall 35 in a portion facing the side surface 22, and has a structure in which a plurality of columnar protrusions 363p, each having a shape based on a portion of a cylinder extending in the Z1-Z2 direction, are arranged side by side. Similar to the overall shape of the group of pin-shaped protrusions 36p, the overall shape of the group of columnar protrusions 363p becomes higher as it approaches the portion facing the center of each of the side surfaces 22 of the case 20 (first side surface 221 to eighth side surface 228).

[0060] Below, as an example, the results of a simulation of the contact pressure of the case 20 will be shown. Example 1 Fig. 10 is an explanatory diagram of a mounting assembly according to another example of the first embodiment of the present invention, which was used as a model for the simulation in Example 1. In Fig. 10, the container 10 is shown in a perspective view so that the internal structure of the mounting assembly 120 can be easily understood.

[0061] 10 has the same shape as mounting assembly 100, except that the shape of protrusions 361 arranged to face the second side surface 222, the fourth side surface 224, the sixth side surface 226, and the eighth side surface 228 of the side surfaces 22 of the case 20 is different. The protrusions 16 of mounting assembly 100 have five pin-shaped protrusions 16p arranged in the circumferential direction of the inner wall 15, whereas the protrusions 161 of mounting assembly 120 have three pin-shaped protrusions 16p arranged in the circumferential direction of the inner wall 15.

[0062] FIG. 11 is a diagram illustrating a case model used in the simulation of the embodiment. In the simulation, a model 20M consisting of a quarter of the case 20 was used to calculate the contact pressures of six of the side surfaces 226 of the case 20. The origin of the simulation was the end of the sixth side surface 226 on the X2 side in the X1-X2 direction and the Z2 side in the Z1-Z2 direction. The contact pressures at each point on the sixth side surface 226 calculated by the simulation were summed in the Z1-Z2 direction to calculate the circumferential contact pressure distribution. In this case, the start point SP is the origin, and the end point EP is the end point on the Z2 side in the Z1-Z2 direction of the boundary between the sixth side surface 226 and the fifth side surface 225.

[0063] (Comparative Example 1) As a comparative example, a simulation was performed using a container having a shape obtained by removing all of the protrusions 161 from the container 10 according to the first embodiment.

[0064] Example 2 Fig. 12 is an explanatory diagram of a mounting assembly according to another example of the second embodiment of the present invention, which was used as a model in Example 2. In Fig. 12, as in Fig. 10, the container 30 is shown in a perspective view. In the mounting assembly 130 shown in Fig. 12, like the mounting assembly 120 shown in Fig. 10, the protrusions 364 arranged so as to face the second side surface 222, the fourth side surface 224, the sixth side surface 226, and the eighth side surface 228 are three pin-shaped protrusions 36p arranged in the circumferential direction of the inner wall 15, which is different from the mounting assembly 110.

[0065] (Comparative Example 2) As a comparative example, a simulation was performed using a container having a shape obtained by removing all of the protrusions 361 from the container 30 according to the second embodiment.

[0066] Fig. 13 is a diagram showing a simulation result of Comparative Example 1. Fig. 14 is a diagram showing a simulation result of Example 1. Fig. 15 is a diagram showing a simulation result of Comparative Example 2. Fig. 16 is a diagram showing a simulation result of Example 2.

[0067] 13 to 16, the horizontal axis represents the relative position in the circumferential direction of the sixth side surface 226. In the relative position, "0" represents the starting point SP, and "100" represents the ending point EP. The arrows in FIGS. 14 and 16 indicate that the pin-shaped protrusions 16p and 36p come into contact with each other from approximately this position.

[0068] 13 to 16, the vertical axis represents the cumulative surface pressure obtained by summing the surface pressures at each relative position in the circumferential direction in the Z1-Z2 direction and integrating the value obtained from the start point SP, i.e., the contact force, as a relative value (cumulative relative pressure) normalized with the value at the end point EP set to 100. Therefore, in the graphs shown in Fig. 13 to 16, the cumulative relative pressure at relative position "25" corresponds to the contact force between the portion of the sixth side surface 226 of the case 20 ranging from the start point SP to this position and a region R262 on one side (the X2 side in the X1-X2 direction) of the sixth portion connection region R26 of the inner wall 15.

[0069] Therefore, the value V1 corresponding to the contact force (first partial contact force F1p) on the sixth partial side region R16 of the case 20 can be calculated from the difference between the cumulative relative pressure at the relative position "75" (68.6 in FIG. 13) and the cumulative relative pressure at the relative position "25" (37.7 in FIG. 13). The value V1 calculated in this manner is indicated by an arrow in FIG. 13. Then, by subtracting this value V1 from 100, the value V2 corresponding to the contact force (second partial contact force F2p) on the sixth partial connection region R26 of the case 20 can be calculated. Therefore, the first partial contact force F1p / second partial contact force F2p can be calculated from the ratio of these values ​​(V1 / V2). Specifically, in the comparative example shown in FIG. 13, F1p / F2p was 0.45 (=(68.5-37.7) / {100-(68.5-37.7)}).

[0070] Calculating in the same way, F1 / F2 was as follows: Example 1 2.09 Comparative Example 1 0.45 Example 2 2.27 Comparative Example 2 0.31

[0071] From these results, it can be seen that Examples 1 and 2 satisfy the above formula (6) and are in a preferable state, whereas Comparative Examples 1 and 2 do not satisfy the above formula (4) and are not in a preferable state.

[0072] (Tire sensing module) FIG. 18 is an explanatory diagram of a tire sensing module according to one embodiment of the present invention. A tire sensing module 300 according to one embodiment of the present invention includes a mounting assembly (mounting assembly 100, mounting assembly 110, etc.) according to the above-described embodiment of the present invention. In one specific example, as shown in FIG. 18, the tire sensing module 300 is composed of the mounting assembly 100, and the surface of the mounting assembly 100 facing the container 10 in the Z1-Z2 direction is attached and fixed to the inner surface 201 of the tire 200 using an adhesive or the like. In a preferred example, the X1-X2 direction of the mounting assembly 100 is aligned with the circumferential direction L of the inner surface 201 of the tire 200, and the mounting assembly 100 is positioned so that the center of the width direction W overlaps with the center of the mounting assembly 100 in the Y1-Y2 direction when viewed in the Z1-Z2 direction.

[0073] The tire sensing module 300 equipped with the mounting assembly 100 measures the internal pressure of the tire 200, measures the rotational speed, and measures the degree of wear of the tread pattern provided on the outer surface 202 of the tire 200. From the viewpoint of improving the accuracy of these measurements, it is preferable that the case 20 disposed inside the storage section 14 of the container 10 of the mounting assembly 100 equipped with the tire sensing module 300 does not change its relative position with respect to the container 10 even when subjected to external forces due to tire rotation or impact. In the mounting assembly 100 according to this embodiment, the relative position of the case 20 with respect to the container 10 is unlikely to change as described above, and therefore the tire sensing module 300 can maintain high measurement accuracy.

[0074] The above-described embodiments are provided to facilitate understanding of the present invention and are not intended to limit the present invention. Therefore, the elements disclosed in the above embodiments are intended to encompass all design modifications and equivalents within the technical scope of the present invention. For example, in the above-described embodiments, as shown in FIG. 3 and other figures, the general polygon S1 has a shape in which the length in the X1-X2 direction is longer than the length in the Y1-Y2 direction. However, this is not limited to this. The length in the X1-X2 direction may be shorter than the length in the Y1-Y2 direction, or both lengths may be equal, i.e., the general polygon S1 may be a regular octagon. Furthermore, although modified protrusions have been described in the second embodiment, protrusions having similar shapes may also be provided on the mounting assembly 100 according to the first embodiment. [Explanation of symbols]

[0075] 100, 110, 120, 130: Mounting assembly 10, 30, 301, 302, 303: Containers 11, 31: Wall part 111, 311: Open end 112, 312: Closed end 12, 32: Mounting part 13: Overhang 14, 34: Storage section 15, 35: Inner wall 16, 36, 161, 361, 362, 363, 364: Projection 16p, 36p: pin-shaped protrusion 362p: pyramidal process 363p: columnar process 17, 37: Bottom 20: Case 20M: Model 21: Bottom 22: Side 221~228: 1st side ~ 8th side 200: Tire 201:Inside 202: External surface 300: Tire sensing module F1: 1st contact force F1p: 1st part contact force F2: 2nd contact force F2p: 2nd part contact force L: Circumferential direction L1~L8: Side 1 to Side 8 R1: Side area R1i: Partial side area R11~R18: 1st partial side area ~ 8th partial side area R2: Connection area R2i: Partially connected region R21 to R28: 1st partial connection area to 8th partial connection area R211~R812: Area S1: Approximate polygon SP:Start point EP: End Point V1, V2: values W: Width direction w1~w8: Width of the first side to width of the eighth side w11~w81: Half the width of the first side to half the width of the eighth side

Claims

1. a container having a wall portion that forms a hollow storage portion that opens in a first direction, and an attachment portion that is connected to an end portion of the wall portion in the first direction and is for attachment to an attachment target; a case that is held in the housing portion and in contact with an inner wall of the wall portion; A mounting assembly comprising: the general shape of the cross section of the wall portion as viewed from the first direction is a polygon in which the interior angles of all vertices are less than 180°, the inner wall has a side region that is a region corresponding to a central portion excluding 25% of each end of each side of the polygon, and a connection region that is a region other than the side region, A first contact force F1, which is a contact force of the case against the side surface region, and a second contact force F2, which is a contact force of the case against the connection region, are: A mounting assembly characterized by satisfying the following formula (1): 0.5≦F1 / F2≦2.5 (1)

2. a container having a wall portion that forms a hollow storage portion that opens in a first direction, and an attachment portion that is connected to an end portion of the wall portion in the first direction and is for attachment to an attachment target; a case that is held in the housing portion and in contact with an inner wall of the wall portion; A mounting assembly comprising: the general shape of the cross section of the wall portion as viewed from the first direction is a polygon in which the interior angles of all vertices are less than 180°, the inner wall has a side region that is a region corresponding to a central portion excluding 25% of each end of each side of the polygon, and a connection region that is a region other than the side region, A first contact force F1, which is a contact force of the case against the side surface region, and a second contact force F2, which is a contact force of the case against the connection region, are: A mounting assembly characterized by satisfying the following formula (2): F1>F2 (2)

3. 3. The mounting assembly according to claim 1, wherein the side surface region has a protrusion that protrudes toward the case and contacts the case.

4. 3. The mounting assembly according to claim 1, wherein the following formula (3) is satisfied: 1.0<F1 / F2≦2.5 (3)

5. the side region is made up of a plurality of partial side regions separated by the connection region, the connection region is made up of a plurality of partial connection regions separated by the side regions, 2. The mounting assembly of claim 1, wherein a first partial contact force F1p, which is the contact force of the case against one of the partial side areas, and a second partial contact force F2p, which is the contact force of the case against one of the partial connection areas adjacent to the one partial side area, satisfy the following formula (4): 0.5≦F1p / F2p≦2.5 (4)

6. the side region is made up of a plurality of partial side regions separated by the connection region, the connection region is made up of a plurality of partial connection regions separated by the side regions, 3. The mounting assembly of claim 2, wherein a first partial contact force F1p, which is the contact force of the case against one of the partial side areas, and a second partial contact force F2p, which is the contact force of the case against one of the partial connection areas adjacent to the one partial side area, satisfy the following formula (5): F1p>F2p (5)

7. 7. The mounting assembly according to claim 5, wherein the following formula (6) is satisfied: 1.0<F1p / F2p≦2.5 (6)

8. The mounting assembly according to claim 1 or 2, wherein the housing portion is open on one side in the first direction and closed on the other side in the first direction.

9. The mounting assembly of claim 8 , wherein the end to which the mounting portion is connected forms an open end of the wall portion.

10. The mounting assembly of claim 8 , wherein the end to which the mounting portion is connected forms a closed end of the wall portion.

11. 3. The mounting assembly of claim 1 or claim 2, wherein the case houses an electronic component.

12. The mounting assembly of claim 11 , wherein the electronic component comprises a sensor element.

13. The mounting assembly of claim 11 , wherein the electronic component comprises an energy harvesting device.

14. The mounting assembly of claim 11 , wherein the electronic component comprises an actuator element.

15. A tire sensing module comprising a mounting assembly according to any one of claims 12 to 14.

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