Core Support Structure

Abstract

This core support structure comprises: a first core; and a bearing member that bears the first core. The bearing member has: a bottom wall section on which the bottom surface of the first core is placed; and side wall sections that face side surfaces of the first core. The bottom wall section and / or the side wall sections have formed thereon contact avoidance sections for avoiding contact with corners of the first core.

Description

[Technical Field]

[0001] The present disclosure relates to a core support structure. [Background technology]

[0002] Cores used in electronic devices have a problem in that the corners of the core ride up on the rounded corners of the receiving member that holds the core, which can cause damage or reduce heat dissipation.To address this issue, the corners of the core are chamfered to create a gap between them and the rounded corners of the receiving member, thereby preventing the corners of the core from riding up on them. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-12607 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when chamfering the corners of the core as mentioned above, there are problems such as the need to process the core and manage its dimensions, and the reduction in core volume due to the processing also results in a decrease in magnetic flux and an asymmetric core shape, which can cause directional issues when the core is installed on a receiving member, requiring care when installing the core.

[0005] An object of the present disclosure is to provide a core support structure that can prevent corners of a core from riding on a receiving member without requiring processing of the core. [Means for solving the problem]

[0006] A core support structure according to one embodiment of the present disclosure comprises a first core and a receiving member for receiving the first core, the receiving member having a bottom wall portion on which the bottom surface of the first core is placed and a side wall portion facing the side surface of the first core, and at least one of the bottom wall portion and the side wall portion has a contact avoidance portion formed thereon to avoid contact with the corners of the first core.

[0007] In a core support structure according to one embodiment of the present disclosure, the receiving member has a bottom wall portion on which the bottom surface of the first core is placed and a side wall portion facing the side surface of the first core. Therefore, the corners of the first core are positioned close to the corners between the bottom wall portion and the side wall portion. At least one of the bottom wall portion and the side wall portion has a contact avoidance portion that avoids contact with the corners of the first core. Therefore, even if the corners of the first core are not chamfered, the corners of the first core are prevented from contacting and riding up against the rounded corners of the receiving member, and the first core is installed on the receiving member while resting on the bottom wall portion.

[0008] The rotor may further include a second core disposed opposite the first core, and the receiving member may be a spacer member disposed between the first core and the second core. In this case, the first core can be prevented from riding on the receiving member, and the size of the gap between the first core and the second core can be maintained constant.

[0009] The contact avoidance portion may be constituted by a through hole formed in the receiving member, in which case the contact avoidance portion can be provided by a simple configuration of just forming a through hole in the receiving member.

[0010] The contact avoidance portion may be a groove formed in the receiving member, in which case the contact avoidance portion can be provided by a simple configuration of just forming the groove in the receiving member.

[0011] The receiving member may have a through hole formed therein in which a heat conducting member connected to the first core is disposed. In this case, heat generated in the first core can be transferred to other members via the heat conducting member disposed in the through hole. [Effects of the Invention]

[0012] According to the present disclosure, it is possible to provide a core support structure that can prevent corners of the core from riding on a receiving member without processing the core. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view illustrating a core support structure according to an embodiment of the present disclosure. [Figure 2] FIG. 1 is a cross-sectional perspective view of a core support structure according to an embodiment of the present disclosure. [Figure 3] FIG. 3 is an enlarged view of the cross section shown in FIG. [Figure 4] FIG. [Figure 5] FIG. 10 is a perspective view showing a core support structure according to a modified example. [Figure 6] FIG. 6 is a cross-sectional view taken along line IV-IV shown in FIG. 5. [Figure 7] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] A core support structure 1 according to an embodiment of the present disclosure will be described with reference to Figures 1 to 4. Figure 1 is a perspective view showing the core support structure 1 according to this embodiment of the present disclosure. Figure 2 is a cross-sectional perspective view of the core support structure 1 according to this embodiment of the present disclosure. Figure 3 is an enlarged view of the cross section shown in Figure 2. Figure 4 is a plan view of a spacer member.

[0015] As shown in FIGS. 1 and 2, the core support structure 1 is a structure that supports a first core 3A and a second core 3B. The core support structure 1 is applied to an electronic unit 100 that is configured, for example, by accommodating a circuit board, electronic components, etc. in the internal space of a box-shaped housing. Examples of the electronic unit 100 include a DC / DC converter, a charger, and an ECU (engine control unit). FIGS. 1 and 2 show a portion of such an electronic unit 100. The electronic unit 100 is at least partially equipped with the core support structure 1. The core support structure 1 includes a base plate 2, a first core 3A, a second core 3B, a spacer member 4, and a substrate 7.

[0016] As shown in Figures 1 and 2, the base plate 2 is a structure that supports the first core 3A, the second core 3B, the spacer member 4, and the substrate 7. The base plate 2 is a member that constitutes a housing that houses the above-mentioned electronic unit. The base plate 2 has a main surface 2a that supports the components of the electronic unit. The base plate 2 has protrusions and grooves on the main surface 2a that supports the components. Note that the following explanation may be made using XYZ coordinates. The X-axis and Y-axis directions are mutually perpendicular and are the planar direction in which the base plate 2 extends. The Z-axis direction is a direction perpendicular to the X-axis and Y-axis and is the thickness direction of the base plate 2. In the Z-axis direction, the main surface 2a side is the positive side. One side of the X-axis and Y-axis directions is the positive side, and the other side is the negative side.

[0017] The second core 3B is an I-shaped core. The second core 3B is disposed on the main surface 2a of the base plate 2. The second core 3B is disposed on the negative side of the first core 3A in the Z-axis direction. The second core 3B has a rectangular parallelepiped shape with the Y-axis direction as its longitudinal direction. A recess 11 is formed on the main surface 2a of the base plate 2 to position the second core 3B in the X-axis and Y-axis directions when assembling the second core 3B. The main surface of the second core 3B on the negative side in the Z-axis direction is disposed within the recess 11 so as to contact the bottom surface of the recess 11 (see FIG. 2). This positions the second core 3B in the Z-axis relative to the base plate 2 and thermally connects the second core 3B to the base plate 2. In addition, sidewall portions 11a rising toward the positive side in the Z-axis direction are formed on the four edges of the recess 11. At this time, the four side surfaces of the second core 3B face the four side wall portions 11a of the recess 11 with a small gap between them, thereby positioning the second core 3B relative to the base plate 2 in the X-axis direction and the Y-axis direction.

[0018] The first core 3A is a U-shaped core. The first core 3A is disposed on the positive side of the first core 3A in the Z-axis direction. The first core 3A has a substantially rectangular parallelepiped shape. The first core 3A also has an inverted U-shape when viewed in the X-axis direction. The first core 3A has an opening 12 extending from a principal surface 3Aa (see FIG. 2) on the negative side in the Z-axis direction to the positive side in the Z-axis direction. The opening 12 extends with a constant cross-sectional shape in the X-axis direction. The first core 3A has a leg portion 6A on the negative side in the Y-axis direction of the opening 12 and a leg portion 6B on the positive side in the Y-axis direction of the opening 12. The legs 6A and 6B each have a rectangular prism shape. The principal surface 3Aa on the negative side in the Z-axis direction of the first core 3A and the principal surface 3Ba on the positive side in the Z-axis direction of the second core 3B face each other in the Z-axis direction while being spaced apart from each other via a spacer member 4 (see FIG. 2).

[0019] In this embodiment, the second core 3B is an I-shaped core and the first core 3A is a U-shaped core, but the present invention is not limited to this combination of core shapes and may also be a combination of U / U, E / I, or E / E cores.

[0020] As shown in FIGS. 1 and 2, the spacer member 4 is a member that is disposed between the first core 3A and the second core 3B and is made of a material that has insulating, non-magnetic and thermally conductive properties.

[0021] The spacer member 4 is a portion that forms a gap between the first core 3A and the second core 3B. The spacer member 4 is also configured as a receiving member 10 that receives the first core 3A. The spacer member 4 has a rectangular plate shape that extends parallel to the XY plane. The spacer member 4 is interposed between the first core 3A and the second core 3B so as to contact the positive main surface 3Bb of the second core 3B in the Z-axis direction and the negative main surface 3Aa of the first core 3A in the Z-axis direction (see FIG. 3). This forms a constant core gap, the thickness of which is equal to the thickness of the spacer member 4, between the legs 6A and 6B of the first core 3A and the second core 3B. As a result, the second core 3B is magnetically (and thermally) coupled to the first core 3A via the resin spacer member 4.

[0022] The spacer member 4 includes a housing portion 13A that houses the leg portion 6A of the first core 3A and a housing portion 13B that houses the leg portion 6B. The area of ​​the spacer member 4A on the negative side in the Y-axis direction is the housing portion 13A, and the area on the positive side in the Y-axis direction is the housing portion 13B. As shown in FIG. 4, the spacer member 4 has a symmetrical configuration with respect to a center line CL1 in the Y-axis direction and a symmetrical configuration with respect to a center line CL2 in the X-axis direction. Therefore, in the following description, only the housing portion 13A will be described, and a description of the housing portion 13B will be omitted.

[0023] As shown in Fig. 4, the spacer member 4 has a bottom wall 21 and side walls 22, 23, 24, and 25. The bottom wall 21 is a wall on which the main surface 3Aa, which is the bottom surface of the first core 3A, is placed. The bottom wall 21 is a rectangular wall extending parallel to the YX plane. The side walls 22, 23, 24, and 25 are provided on the four edges of the bottom wall 21 and extend along the edges and toward the positive side in the Z-axis direction.

[0024] The side wall portion 22 extends parallel to the X-axis direction at an edge portion on the negative side in the Y-axis direction of the bottom wall portion 21. As a result, the side wall portion 22 faces the negative side surface 6a of the leg portion 6A of the first core 3A in the Y-axis direction. As a result, the side wall portion 22 faces the negative side surface 6a of the leg portion 6A of the first core 3A in the Y-axis direction. The side wall portion 23 extends parallel to the X-axis direction at an edge portion on the positive side in the Y-axis direction of the bottom wall portion 21. As a result, the side wall portion 23 faces the positive side surface 6b of the leg portion 6A of the first core 3A in the Y-axis direction. The side wall portion 24 extends parallel to the Y-axis direction at an edge portion on the negative side in the X-axis direction of the bottom wall portion 21. As a result, the side wall portion 24 faces the negative side surface 6c of the leg portion 6A of the first core 3A in the X-axis direction. The side wall portion 25 extends parallel to the Y-axis direction at the edge portion on the positive side in the X-axis direction of the bottom wall portion 21. As a result, the side wall portion 25 faces the side surface 6d on the positive side in the X-axis direction of the leg portion 6A of the first core 3A in the X-axis direction.

[0025] The side wall 22 on the negative side in the Y axis direction has a restricting portion 22a at the center in the X axis direction that protrudes toward the positive side in the Y axis direction. When the leg 6A of the first core 3A is moved toward the negative side in the Y axis direction, the restricting portion 22a comes into contact with the side surface 6a on the negative side in the Y axis direction of the leg 6A, thereby restricting movement. Note that movement of the first core 3A toward the positive side in the Y axis direction is restricted by the restricting portion 22a of the housing portion 13B.

[0026] The side wall 24 on the negative side in the X-axis direction has a restricting portion 24a protruding toward the positive side in the X-axis direction at a position closer to the positive side in the Y-axis direction. When the leg 6A of the first core 3A is moved toward the negative side in the X-axis direction, the restricting portion 24a comes into contact with the side surface 6c of the leg 6A on the negative side in the X-axis direction, thereby restricting movement. The side wall 25 on the positive side in the X-axis direction has a restricting portion 25a protruding toward the negative side in the X-axis direction at a position closer to the positive side in the Y-axis direction. When the leg 6A of the first core 3A is moved toward the positive side in the X-axis direction, the restricting portion 25a comes into contact with the side surface 6d of the leg 6A on the positive side in the X-axis direction, thereby restricting movement. Note that the side wall portions 23, 24, and 25 have rising portions 26 that rise further toward the positive side in the Z-axis direction (see FIGS. 1 and 2).

[0027] The bottom wall portion 21 is formed with a contact avoidance portion 30 that avoids contact with the corners of the first core 3A. In this embodiment, the contact avoidance portions 30 are formed in three locations. The first contact avoidance portion 30 is formed by a through hole 31 formed at a position corresponding to the restricting portion 22a. The through hole 31 is formed at a position adjacent to the restricting portion 22a on the positive side in the Y-axis direction. The through hole 31 avoids contact with the corners between the bottom surface and the side surface 6a of the leg portion 6A of the first core 3A. The second contact avoidance portion 30 is formed by a through hole 32 formed at a position corresponding to the restricting portion 24a. The through hole 32 is formed at a position adjacent to the restricting portion 24a on the positive side in the X-axis direction. The through hole 32 avoids contact with the corners between the bottom surface and the side surface 6c of the leg portion 6A of the first core 3A. The third contact avoidance portion 30 is formed by a through hole 33 formed at a position corresponding to the restricting portion 25a. The through hole 33 is formed at a position adjacent to the restricting portion 25a on the positive side in the X-axis direction. The through hole 33 prevents the corner between the bottom surface and the side surface 6d of the leg portion 6A of the first core 3A from contacting with each other.

[0028] Next, the contact avoidance portion 30 will be described in more detail with reference to FIG. 3(a). While FIG. 3(a) illustrates the through hole 31 of the three contact avoidance portions 30, the other through holes 32 and 33 function similarly. As shown in FIG. 3(a), the contact avoidance portion 30 is a portion that avoids contact with a corner 35 of the first core 3A at the corner between the side wall portion 22 and the bottom wall portion 21. The through hole 31 constituting the contact avoidance portion 30 penetrates the bottom wall portion 21 in the Z-axis direction at a position adjacent to the restricting portion 22a of the side wall portion 22. The outer peripheral surface 31a of the through hole 31 on the negative side in the Y-axis direction is a surface that continues to the negative side in the Z-axis direction from the surface of the restricting portion 22a so as to form the same plane as the surface of the restricting portion 22a. Because the spacer member 4 is a resin-molded product, rounded corners (see the rounded corners 37 in FIG. 3(b)) are formed at the intersecting surfaces. However, by forming the through hole 31, the spacer member 4 does not have a portion where the restricting portion 22a and the upper surface 21a of the bottom wall portion 21 intersect. This makes it possible to avoid forming a rounded corner shape in the region where the corner portion 35 of the first core 3A may be disposed. The width (dimension in the Y-axis direction) of the through hole 31 is not particularly limited, but it may be sufficient if it has a relationship that can absorb dimensional variations in the core 3A (magnetic body), which is a sintered body, for example.

[0029] A situation in which the corner between the side wall 22 and the bottom wall 21 abuts against the corner 35 will be described with reference to FIG. 3(b). FIG. 3(b) shows a comparative example in which a rounded corner 37 is formed between the side wall 22 and the bottom wall 21. If the first core 3A is shifted toward the negative side in the Y-axis direction due to misalignment during installation, the corner 35 of the first core 3A abuts against the rounded corner 37 and is guided by the curved shape of the rounded corner 37 and ends up riding on the rounded corner 37. Alternatively, if an attempt is made to insert the first core 3A into the spacer member from the positive side to the negative side in the Z-axis direction while the side surface 6a of the first core 3A and the restricting portion 22a are in close proximity to or in contact with each other, the corner 35 of the first core 3A abuts against the rounded corner 37, and the first core 3A stops before the main surface 3Aa and the upper surface 21a of the bottom wall 21 come into complete contact. In these cases, the main surface 3Aa, which is the bottom surface of the first core 3A, is tilted so as to be separated from the upper surface 21a of the bottom wall portion 21. Note that when the corner portion 35 of the first core 3A abuts against the rounded corner shape 37 of the spacer member 4, it interferes with the rounded corner shape 37, making it impossible to position the first core 3A in a desired position. In this case, the abutment avoidance portion 30 may be considered as an interference avoidance portion that avoids interference with the corner portion 35 of the first core 3A at the corner between the side wall portion 22 and the bottom wall portion 21.

[0030] In contrast, in the core support structure 1 according to this embodiment shown in FIG. 3(a), no rounded corners are formed. Therefore, when the first core 3A is shifted toward the negative side in the Y-axis direction, the main surface 3Aa remains in contact with the upper surface 21a of the bottom wall portion 21, and the side surface 6a comes into contact with the restricting portion 22a without the corner 35 coming into contact with the spacer member 4 (see the imaginary line in FIG. 3(a)). Alternatively, when the side surface 6a of the first core 3A and the restricting portion 22a are in close proximity to or in contact with each other, if an attempt is made to insert the first core 3A into the spacer member from the positive side to the negative side in the Z-axis direction, the main surface 3Aa and the upper surface 21a of the bottom wall portion 21 come into complete contact with each other without the corner 35 coming into contact with the spacer member 4.

[0031] The through-holes 31 may be filled with a heat-conducting member 36. The heat-conducting member 36 is connected to the main surface 3Aa of the first core 3A and the main surface 3Ba of the second core 3B. This allows heat generated in the first core 3A to be transferred to the second core 3B via the heat-conducting member 36. Furthermore, the heat from the first core 3A transferred to the second core 3B is transferred to the base plate 2 along with the heat generated in the second core 3B, and is dissipated from the base plate into the air. The material for the heat-conducting member 36 should have high infiltrability as an initial physical property, and may be either hardening or non-hardening as a physical property change over time, but a material with thermal conductivity is preferred. If thermal conductivity is the only requirement, a low-hardness sheet with thermal conductivity may be used.

[0032] Next, we will explain the functions and effects of the core support structure 1 according to this embodiment. Note that, although we will explain the functions and effects obtained with the through hole 31 of the three contact avoidance sections 30, similar functions and effects can be obtained with the other through holes 32 and 33.

[0033] In a core support structure 1 according to one aspect of the present embodiment, the receiving member 10 has a bottom wall 21 on which the main surface 3Aa (bottom surface) of the first core 3A is placed, and a side wall 22 facing the side surface 6a of the first core 3A. Accordingly, a corner 35 of the first core 3A is disposed adjacent to a corner between the bottom wall 21 and the side wall 22. The bottom wall 21 is formed with a contact avoidance portion 30 that avoids contact with the corner 35 of the first core 3A. Therefore, even if the corner 35 of the first core 3A is not chamfered, the corner 35 of the first core 3A is prevented from contacting and riding up against the rounded corner of the receiving member 10 (see FIG. 3(b)), and the first core 3A is installed on the receiving member 10 while being placed on the bottom wall 21.

[0034] The core support structure 1 further includes a second core 3B disposed opposite the first core 3A, and the receiving member 10 may be a spacer member 4 disposed between the first core 3A and the second core 3B. In this case, the first core 3A can be prevented from riding on the receiving member 10, and the size of the gap between the first core 3A and the second core 3B can be kept constant.

[0035] The contact avoidance portion 30 may be constituted by a through hole 31 formed in the receiving member 10. In this case, the contact avoidance portion 30 can be provided by a simple configuration of just forming the through hole 31 in the receiving member 10. Furthermore, the through hole 31 can make the spacer member 4 lighter than a groove portion, which will be described later. Furthermore, a heat conduction member 36 can be disposed in the through hole 31.

[0036] The receiving member 10 may be formed with a through hole 31 in which a heat conduction member 36 connected to the first core 3A is disposed. In this case, heat generated in the first core 3A can be transferred to another member (the second core 3B) via the heat conduction member 36 disposed in the through hole 31.

[0037] The present disclosure is not limited to the above-described embodiments.

[0038] The core support structure 1 shown in FIGS. 5 and 6 may be employed. The core support structure 1 shown in FIGS. 5 and 6 is a structure that supports an E-shaped first core 103A and an I-shaped second core 103B (see FIG. 6). The first core 103A has legs 106A, 106B, and 106C that extend toward the negative side of the Z axis direction and are spaced apart from each other in the Y axis direction. The leg 106A is provided at the end on the negative side of the Y axis direction, and the leg 106B is provided at the end on the positive side of the Y axis direction. The leg 106C is formed between the legs 106A and 106B. The main surface 103Aa (the bottom surface of each leg 106A, 106B, and 106C) of the first core 103A is arranged to face the main surface 103Ba (top surface) of the second core 103B, which is arranged on the negative side of the Z axis direction. The spacer member 104 is a portion that forms a gap between the first core 103A and the second core 103B. The spacer member 104 is also configured as a receiving member 10 that receives the first core 3A.

[0039] 7, the spacer member 104 has a bottom wall 121 and side walls 122, 123, 124, and 125. The bottom wall 121 is a wall on which the main surface 103Aa, which is the bottom surface of the first core 103A, is placed. The bottom wall 121 is a rectangular wall extending parallel to the YX plane. The side walls 122, 123, 124, and 125 are provided on the four edges of the bottom wall 121 and extend along the edges and toward the positive side in the Z-axis direction.

[0040] The side wall 122 extends parallel to the X-axis direction at an edge portion of the bottom wall 121 on the negative side in the Y-axis direction. As a result, the side wall 122 faces the side surface 103Ab on the negative side in the Y-axis direction of the first core 103A in the Y-axis direction. As a result, the side wall 122 faces the side surface 103Ab on the negative side in the Y-axis direction of the first core 103A in the Y-axis direction. The side wall 123 extends parallel to the X-axis direction at an edge portion of the bottom wall 121 on the positive side in the Y-axis direction. As a result, the side wall 123 faces the side surface 103Ac on the positive side in the Y-axis direction of the first core 103A in the Y-axis direction. The side wall 124 extends parallel to the Y-axis direction at an edge portion of the bottom wall 121 on the negative side in the X-axis direction. As a result, side wall 124 faces side surface 103Ad on the negative side in the X axis direction of first core 103A. Side wall 125 extends parallel to the Y axis direction at the edge on the positive side in the X axis direction of bottom wall 121. As a result, side wall 125 faces side surface 103Ae on the positive side in the X axis direction of first core 103A in the X axis direction.

[0041] The bottom wall portion 121 is formed with a contact avoidance portion 30 that avoids contact with the corners of the first core 103A. In this modification, the contact avoidance portion 30 is formed around the entire circumference of the four edges of the bottom wall portion 121. Specifically, the contact avoidance portion 30 is formed by grooves 131, 132, 133, and 134 that extend along the four edges of the bottom wall portion 121 and are recessed toward the negative side in the Z-axis direction. The groove 131 is formed adjacent to the side wall portion 122 on the positive side in the Y-axis direction and extends parallel to the side wall portion 122. The groove 132 is formed adjacent to the side wall portion 123 on the negative side in the Y-axis direction and extends parallel to the side wall portion 123. The groove 133 is formed adjacent to the side wall portion 124 on the positive side in the X-axis direction and extends parallel to the side wall portion 124. Groove 134 is formed at a position adjacent to side wall 125 on the negative side in the X-axis direction, so as to extend parallel to side wall 125. Groove 131, 132, 133, and 134 are connected at their ends to form a continuous rectangular ring-shaped groove.

[0042] Forming the grooves 131, 132, 133, and 134 can prevent rounded corners from being formed between the side walls 122, 123, 124, and 125 and the bottom wall 121. This prevents the corners of the first core 103A from coming into contact with and riding over the rounded corners of the receiving member 10, and the first core 103A is installed on the receiving member 10 in a state where it is placed on the bottom wall 121.

[0043] As shown in Fig. 6, the outer peripheral surfaces of grooves 131, 132 are flush with the inner peripheral side surfaces of sidewalls 122, 123, and are continuous with the side surfaces of sidewalls 122, 123 toward the negative side in the Z-axis direction. The same applies to the relationship between grooves 133, 134 and sidewalls 124, 125. The bottom surfaces of grooves 131, 132, 133, 134 only need to be located at least further to the negative side in the Z-axis direction than upper surface 121a of bottom wall 121, and there is no particular limitation on their depth. The widths of grooves 131, 132, 133, 134 are not particularly limited, but may be such that they can accommodate dimensional variations in core 103A (magnetic body), which is a sintered body.

[0044] In the bottom wall portion 121, a through hole 136 is formed at a position corresponding to the leg portion 106A, a through hole 137 is formed at a position corresponding to the leg portion 106B, and a through hole 138 is formed at a position corresponding to the leg portion 106C. The through holes 136, 137, and 138 are filled with the heat conductive members 36 connected to the legs 106A, 106B, and 106C and the second core 103B. In this manner, the receiving member 10 is formed with the through holes 136, 137, and 138 in which the heat conductive member 36 connected to the first core 103A is disposed. Note that, in a plan view (as shown in FIG. 7 ), the through holes 136, 137, and 138 are formed to have a size, shape, and position such that they fit inside the legs 106A, 106B, and 106C. However, the size, shape, and arrangement of the through-holes 136, 137, and 138 in a plan view (as shown in FIG. 7) are not particularly limited as long as the legs 106A, 106B, and 106C do not fall, and the area of ​​the through-holes 136, 137, and 138 in a plan view may be larger than the area of ​​the legs 106A, 106B, and 106C. Note that the through-holes 136, 137, and 138 may be omitted.

[0045] As described above, the contact avoidance portion 30 may be configured by the grooves 131, 132, 133, and 134 formed in the receiving member 10. In this case, the contact avoidance portion 30 can be provided by a simple configuration of simply forming the grooves 131, 132, 133, and 134 in the receiving member 10. Furthermore, when the grooves 131, 132, 133, and 134 are formed as molded parts, it is only necessary to provide smaller protrusions on the mold than when through holes are formed. Note that the grooves 131, 132, 133, and 134 and the through holes 136, 137, and 138 can function as reservoirs for retaining excess heat conduction member 36.

[0046] 1 to 7, the contact avoidance portion 30 is configured by a through hole or a groove formed in the bottom wall portion. However, since it is only necessary to avoid a rounded corner shape that would cause the corner of the first core to come into contact with the contact avoidance portion 30, the contact avoidance portion 30 may also be configured by a through hole or a groove formed in the side wall portion. Alternatively, the contact avoidance portion 30 may be configured by a combination of through holes and grooves formed in both the bottom wall portion and the side wall portion. Although the cross-sectional shape of the groove is rectangular in FIG. 6, it is not particularly limited and may be semicircular, for example.

[0047] 1 to 7, the cross-sectional shape of the legs of the target core is rectangular, but it may be triangular, polygonal with more sides than rectangular, or even circular. In each case, a continuous groove may be formed as the contact avoidance portion 30 along the entire side or periphery of the bottom wall or side wall, or restricting portions and through holes may be provided at each key point.

[0048] The arrangement and shape of each component shown in each drawing are merely examples and can be modified as appropriate without departing from the spirit of the present disclosure.

[0049] [Form 1] a first core; a receiving member that receives the first core, the receiving member has a bottom wall portion on which a bottom surface of the first core is placed and a side wall portion facing a side surface of the first core, A core support structure in which a contact avoidance portion is formed on at least one of the bottom wall portion and the side wall portion to avoid contact with a corner portion of the first core. [Form 2] Further comprising a second core disposed opposite to the first core, The core support structure of claim 1, wherein the receiving member is a spacer member disposed between the first core and the second core. [Form 3] The core support structure according to aspect 1 or 2, wherein the contact avoidance portion is constituted by a through hole formed in the receiving member. [Form 4] The core support structure according to any one of the first to third aspects, wherein the contact avoidance portion is configured by a groove portion formed in the receiving member. [Form 5] 5. The core support structure according to any one of embodiments 1 to 4, wherein the receiving member has a through hole in which a heat conduction member connected to the first core is disposed. [Explanation of symbols]

[0050] 1...core support structure, 3A, 103A...first core, 3B, 103B...second core, 21, 121...bottom wall portion, 22, 24, 25, 23, 122, 123, 124, 125...side wall portion, 30...contact avoidance portion, 31, 32, 33...through hole, 35...corner portion, 131, 132, 133, 134...groove portion.

Claims

1. a first core; a receiving member that receives the first core, the receiving member has a bottom wall portion on which a bottom surface of the first core is placed and a side wall portion facing a side surface of the first core, A core support structure, wherein at least one of the bottom wall portion and the side wall portion is formed with a contact avoidance portion that avoids contact with a corner portion of the first core.

2. a second core disposed opposite the first core; The core support structure according to claim 1 , wherein the receiving member is a spacer member disposed between the first core and the second core.

3. The core support structure according to claim 1 , wherein the contact avoidance portion is constituted by a through hole formed in the receiving member.

4. The core support structure according to claim 1 , wherein the contact avoidance portion is configured by a groove portion formed in the receiving member.

5. The core support structure according to claim 1 , wherein the receiving member has a through hole in which a heat conducting member connected to the first core is disposed.

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