Magnetic core

Abstract

To provide a magnetic core capable of reducing a clearance in a stacking direction.SOLUTION: A magnetic core includes: a housing; a spacer part; a first magnetic part; a second magnetic part; and a third magnetic part. The housing includes a first housing wall and a second housing wall. The spacer part includes a first spacer wall, a second spacer wall, and a spacer load transmission part. The first housing wall, the first magnetic part, the first spacer wall, the second magnetic part, the second spacer wall, the third magnetic part, and the second housing wall are stacked in this order. The spacer load transmission part transmits a load between the first spacer wall and the second spacer wall to secure a clearance in a stacking direction formed by the second magnetic part between the first spacer wall and the second spacer wall.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to magnetic cores. [Background technology]

[0002] A magnetic core is known that has a housing and a magnetic part, the housing having a first housing wall and a second housing wall, and the first housing wall, the magnetic part, and the second housing wall are laminated in this order (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-179233 [Patent Document 2] Special Publication No. 2021-530683 Summary of the Invention [Problem to be solved by the invention]

[0004] In order to place the magnetic part inside the housing, the magnetic core as described above needs to be configured so that the magnetic part forms a clearance in the stacking direction between the first housing wall and the second housing wall to absorb dimensional variations in the stacking direction, but for the sake of the electromagnetic characteristics of the magnetic core, it is desirable that this clearance be as small as possible.

[0005] Therefore, an object of the present disclosure is to provide a magnetic core that can reduce the clearance in the lamination direction. [Means for solving the problem]

[0006] One aspect of the present disclosure is as follows.

[0007] [1] The magnetic sensor includes a housing, a spacer portion, a first magnetic portion, a second magnetic portion, and a third magnetic portion, the housing has a first housing wall and a second housing wall; the spacer portion has a first spacer wall, a second spacer wall, and a spacer load transmission portion; the first housing wall, the first magnetic portion, the first spacer wall, the second magnetic portion, the second spacer wall, the third magnetic portion, and the second housing wall are stacked in this order; A magnetic core, wherein the spacer load transmission portion transmits load between the first spacer wall and the second spacer wall, thereby ensuring a clearance in the stacking direction formed by the second magnetic portion between the first spacer wall and the second spacer wall.

[0008] [2] The magnetic core described in [1], wherein the spacer load transmission portion has a first spacer wall side portion and a second spacer wall side portion, and transmits load between the first spacer wall and the second spacer wall by abutting the first spacer wall side portion and the second spacer wall side portion in the stacking direction.

[0009] [3] the spacer portion includes a first spacer member and a second spacer member, the first spacer member has the first spacer wall and first side walls connected to an outer peripheral edge and an inner peripheral edge of the first spacer wall, the second spacer member has the second spacer wall and second side walls connected to the outer peripheral edge and the inner peripheral edge of the second spacer wall, the first side walls have the first spacer wall side portions of the spacer load transmission portions, The magnetic core according to [2], wherein the second side walls have the second spacer wall side portions of the spacer load transmission portions.

[0010] [4] the second magnetic portion is a multi-layer magnetic body stacked in the stacking direction, divided in a division direction perpendicular to the stacking direction, and has a second comb tooth portion and a second fitting portion; the second comb tooth portion is formed by the magnetic bodies on one side of the divided layers being shifted from each other in the division direction, The second fitting portion is formed into a complementary shape to the second comb tooth portion by the magnetic material layers on the other side of the division being shifted relative to each other in the direction of division, and is fitted into the second comb tooth portion. A magnetic core described in any one of [1] to [3].

[0011] [5] A magnetic core described in any one of [1] to [4], having a first load transmission part that transmits load between the first housing wall and the first spacer wall, thereby ensuring a clearance in the stacking direction formed by the first magnetic part between the first housing wall and the first spacer wall.

[0012] [6] The magnetic core described in [5], wherein the first load transmission portion is integrally formed with the first spacer wall and transmits load between the first housing wall and the first spacer wall by abutting against the first housing wall in the stacking direction.

[0013] [7] the first magnetic portion is a multi-layer magnetic body stacked in the stacking direction, divided in a division direction perpendicular to the stacking direction, and has a first comb tooth portion and a first fitting portion; the first comb tooth portion is formed by the magnetic bodies of the plurality of layers on one side of the division being shifted from each other in the division direction, The magnetic core described in any one of [1] to [6], wherein the first fitting portion is formed into a complementary shape to the first comb tooth portion by the multiple layers of magnetic material on the other side of the division being shifted relative to each other in the division direction, and is fitted into the first comb tooth portion.

[0014] [8] A magnetic core described in any one of [1] to [7], having a second load transmission part that transmits load between the second housing wall and the second spacer wall, thereby ensuring a clearance in the stacking direction formed by the third magnetic part between the second housing wall and the second spacer wall.

[0015] [9] The magnetic core described in [8], wherein the second load transmission portion is integrally formed with the second spacer wall and transmits load between the second housing wall and the second spacer wall by abutting against the second housing wall in the stacking direction.

[0016]

[10] the third magnetic portion is a multi-layer magnetic body stacked in the stacking direction, divided in a division direction perpendicular to the stacking direction, and has a third comb tooth portion and a third fitting portion; the third comb tooth portion is formed by the magnetic bodies on one side of the divided layers being shifted from each other in the division direction, The magnetic core described in any one of [1] to [9], wherein the third fitting portion is formed into a complementary shape to the third comb tooth portion by the multiple layers of magnetic material on the other side of the division being shifted relative to each other in the division direction, and is fitted into the third comb tooth portion.

[0017]

[11] the first spacer wall is divided in a division direction perpendicular to the stacking direction and has a first spacer overlapped portion and a first spacer overlapping portion; the spacer first overlapped portion is provided on one side of the division, The magnetic core according to any one of [1] to

[10] , wherein the spacer first overlapping portion is provided on the other divided side and overlaps the spacer first overlapped portion when viewed in the stacking direction.

[0018]

[12] the second spacer wall is divided in a division direction perpendicular to the stacking direction and has a second spacer overlapped portion and a second spacer overlapping portion, the spacer second overlapped portion is provided on one side of the division, The magnetic core according to any one of [1] to

[11] , wherein the spacer second overlapping portion is provided on the other divided side and overlaps the spacer second overlapped portion when viewed in the stacking direction.

[0019]

[13] the first housing wall is divided in a division direction perpendicular to the stacking direction and has a housing first overlapped portion and a housing first overlapping portion; the first overlapped portion of the housing is provided on one side of the divided portion, The magnetic core according to any one of [1] to

[12] , wherein the first housing overlapping portion is provided on the other divided side and overlaps with the first housing overlapped portion when viewed in the stacking direction.

[0020]

[14] the second housing wall is divided in a division direction perpendicular to the stacking direction and has a second housing overlapped portion and a second housing overlapping portion, the second overlapped portion of the housing is provided on one side of the divided portion, The magnetic core according to any one of [1] to

[13] , wherein the second housing overlapping portion is provided on the other divided side and overlaps with the second housing overlapped portion when viewed in the stacking direction.

[0021]

[15] A second clamping portion is provided. the second magnetic unit is a multi-layer magnetic body stacked in the stacking direction, The magnetic core according to any one of [1] to

[14] , wherein the second sandwiching portion has both or either a portion sandwiched in the stacking direction between the second magnetic portion and the first spacer wall and a portion sandwiched in the stacking direction between the second magnetic portion and the second spacer wall, thereby bringing adjacent magnetic bodies in the second magnetic portion into close contact with each other.

[0022]

[16] A first clamping portion is provided. the first magnetic unit is a multi-layer magnetic body stacked in the stacking direction, The magnetic core described in any one of [1] to

[15] , wherein the first sandwiching portion has both or either a portion sandwiched in the stacking direction between the first magnetic portion and the first spacer wall and a portion sandwiched in the stacking direction between the first magnetic portion and the first housing wall, thereby bringing adjacent magnetic bodies in the first magnetic portion into close contact with each other.

[0023]

[17] A third clamping portion is provided. the third magnetic unit is a multi-layer magnetic body stacked in the stacking direction, The magnetic core according to any one of [1] to

[16] , wherein the third sandwiching portion has both or either a portion sandwiched in the stacking direction between the third magnetic portion and the second spacer wall and a portion sandwiched in the stacking direction between the third magnetic portion and the second housing wall, thereby bringing adjacent magnetic bodies in the third magnetic portion into close contact with each other.

[0024]

[18] [1] to

[17] , comprising the magnetic core according to any one of the above items; The magnetic core is annular and defines an opening radially inward through which a conductor carrying a current to be measured passes. [Effects of the Invention]

[0025] According to the present disclosure, it is possible to provide a magnetic core that can reduce the clearance in the stacking direction. [Brief explanation of the drawings]

[0026] [Figure 1] FIG. 2 is a cross-sectional view showing a fitted state of the magnetic core according to the first embodiment of the present disclosure. [Figure 2] 2 is a cross-sectional view showing a divided state of the magnetic core shown in FIG. 1. [Figure 3] FIG. 10 is a perspective view showing one side of a divided magnetic core according to a second embodiment of the present disclosure. [Figure 4] FIG. 4 is a perspective view showing a spacer portion in the state shown in FIG. 3. [Figure 5] FIG. 5 is an exploded perspective view of the spacer portion shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0027] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0028] As shown in Figures 1 and 2, the magnetic core 1 according to the first embodiment of the present disclosure includes a housing 2, a spacer portion 3, a first magnetic portion 4, a second magnetic portion 5, and a third magnetic portion 6. The housing 2 includes a first housing wall 2a1 and a second housing wall 2b1. The spacer portion 3 includes a first spacer wall 3a1, a second spacer wall 3b1, and a spacer load transmission portion 3c. The first housing wall 2a1, the first magnetic portion 4, the first spacer wall 3a1, the second magnetic portion 5, the second spacer wall 3b1, the third magnetic portion 6, and the second housing wall 2b1 are stacked in this order. The spacer load transmission portion 3c transmits load between the first spacer wall 3a1 and the second spacer wall 3b1, thereby ensuring a clearance in the stacking direction formed by the second magnetic portion 5 between the first spacer wall 3a1 and the second spacer wall 3b1.

[0029] In order to arrange the first magnetic part 4, first spacer wall 3a1, second magnetic part 5, second spacer wall 3b1 and third magnetic part 6 within the housing 2, the magnetic core 1 as described above needs to be configured so that the first magnetic part 4, first spacer wall 3a1, second magnetic part 5, second spacer wall 3b1 and third magnetic part 6 form a clearance in the stacking direction between the first housing wall 2a1 and the second housing wall 2b1 to absorb dimensional variations in the stacking direction, but for the sake of the electromagnetic characteristics of the magnetic core 1, it is desirable that the deviation and total sum of the clearance in the stacking direction be as small as possible. According to the above configuration in which the spacer load transmission portion 3c is provided, the second clearance secured in the second section S2 between the first spacer wall 3a1 and the second spacer wall 3b1 can be made independent of the first clearance secured in the first section S1 between the first housing wall 2a1 and the first spacer wall 3a1 and the third clearance secured in the third section S3 between the second housing wall 2b1 and the second spacer wall 3b1, thereby suppressing the bias and sum of the clearances between the first housing wall 2a1 and the second housing wall 2b1.

[0030] The spacer load transmission portion 3c has a first spacer wall side portion 3c1 and a second spacer wall side portion 3c2, and transmits a load between the first spacer wall 3a1 and the second spacer wall 3b1 by the first spacer wall side portion 3c1 and the second spacer wall side portion 3c2 butting against each other in the stacking direction. According to the above configuration, the first spacer wall 3a1 and the second spacer wall 3b1 can be assembled by placing the second magnetic portion 5 in the second section S2 with the first spacer wall 3a1 and the second spacer wall 3b1 sufficiently spaced apart in the stacking direction, and then bringing the first spacer wall 3a1 and the second spacer wall 3b1 close to each other, thereby achieving excellent assemblability.

[0031] The second magnetic portion 5 is a multi-layer magnetic body stacked in the stacking direction, divided in a division direction perpendicular to the stacking direction, and has second comb-tooth portions 5a and second fitting portions 5b, the second comb-tooth portions 5a being formed by the multi-layer magnetic body on one side being shifted relative to each other in the division direction, and the second fitting portions 5b being formed in a shape complementary to the second comb-tooth portion 5a by the multi-layer magnetic body on the other side being shifted relative to each other in the division direction, and fitting with the second comb-tooth portion 5a. In this configuration having the second comb-tooth portions 5a and the second fitting portions 5b, the clearance in the second section S2 is appropriately ensured, thereby suppressing the fitting resistance of the second comb-tooth portions 5a and the second fitting portions 5b.

[0032] The magnetic core 1 has a first load transmission part 3a3 that transmits a load between the first housing wall 2a1 and the first spacer wall 3a1, thereby ensuring a clearance in the stacking direction formed by the first magnetic part 4 between the first housing wall 2a1 and the first spacer wall 3a1. According to the above configuration, the first load transmission part 3a3 makes it possible to separate the first clearance ensured in the first section S1 between the first housing wall 2a1 and the first spacer wall 3a1 from the second clearance ensured in the second section S2 between the first spacer wall 3a1 and the second spacer wall 3b1 and the third clearance ensured in the third section S3 between the second housing wall 2b1 and the second spacer wall 3b1, thereby further suppressing deviation and sum of the clearances between the first housing wall 2a1 and the second housing wall 2b1.

[0033] The first load transmission part 3a3 is formed integrally with the first spacer wall 3a1 and transmits a load between the first housing wall 2a1 and the first spacer wall 3a1 by abutting against the first housing wall 2a1 in the stacking direction. According to the above configuration, the first magnetic part 4 can be placed in the first section S1 with the first housing wall 2a1 and the first spacer wall 3a1 sufficiently spaced apart in the stacking direction, and then the first housing wall 2a1 and the first spacer wall 3a1 can be brought closer to each other for assembly, thereby achieving even better assemblability.

[0034] The first magnetic portion 4 is a multi-layer magnetic body stacked in the stacking direction, divided in a division direction perpendicular to the stacking direction, and has a first comb-tooth portion 4a and a first fitting portion 4b, the first comb-tooth portion 4a being formed by the multi-layer magnetic body on one side being shifted relative to each other in the division direction, and the first fitting portion 4b being formed in a shape complementary to the first comb-tooth portion 4a by the multi-layer magnetic body on the other side being shifted relative to each other in the division direction, and fitting with the first comb-tooth portion 4a. In this configuration having the first comb-tooth portion 4a and the first fitting portion 4b, the deviation and sum of the clearance between the first housing wall 2a1 and the second housing wall 2b1 are suppressed, and in particular, the clearance in the first section S1 is properly secured, thereby suppressing the fitting resistance of the first comb-tooth portion 4a and the first fitting portion 4b.

[0035] The magnetic core 1 has a second load transmission portion 3b3 that transmits a load between the second housing wall 2b1 and the second spacer wall 3b1, thereby ensuring a clearance in the stacking direction formed by the third magnetic portion 6 between the second housing wall 2b1 and the second spacer wall 3b1. According to the above configuration, the second load transmission portion 3b3 makes it possible to separate the third clearance, which is ensured in the third section S3 between the second housing wall 2b1 and the second spacer wall 3b1, from the first clearance, which is ensured in the first section S1 between the first housing wall 2a1 and the first spacer wall 3a1, and the second clearance, which is ensured in the second section S2 between the first spacer wall 3a1 and the second spacer wall 3b1. This further reduces the deviation and sum of the clearances between the first housing wall 2a1 and the second housing wall 2b1.

[0036] The second load transmission portion 3b3 is formed integrally with the second spacer wall 3b1 and transmits a load between the second housing wall 2b1 and the second spacer wall 3b1 by abutting against the second housing wall 2b1 in the stacking direction. According to the above configuration, the third magnetic portion 6 can be placed in the third section S3 with the second housing wall 2b1 and the second spacer wall 3b1 sufficiently spaced apart in the stacking direction, and then the second housing wall 2b1 and the second spacer wall 3b1 can be brought closer to each other for assembly, thereby achieving even better ease of assembly.

[0037] The third magnetic portion 6 is a multi-layer magnetic body stacked in the stacking direction, divided in a division direction perpendicular to the stacking direction, and has a third comb-tooth portion 6a and a third fitting portion 6b, the third comb-tooth portion 6a being formed by the multi-layer magnetic body on one side being shifted relative to each other in the division direction, and the third fitting portion 6b being formed by the multi-layer magnetic body on the other side being shifted relative to each other in the division direction, so that it has a complementary shape to the third comb-tooth portion 6a and fits into the third comb-tooth portion 6a. In this configuration having the third comb-tooth portion 6a and the third fitting portion 6b, the deviation and sum of the clearance between the first housing wall 2a1 and the second housing wall 2b1 are suppressed, and the clearance in the third section S3 in particular is properly secured, thereby suppressing the fitting resistance of the third comb-tooth portion 6a and the third fitting portion 6b.

[0038] The first spacer wall 3a1 is divided in a division direction perpendicular to the stacking direction and has a first spacer overlapped portion 3a1a and a first spacer overlapping portion 3a1b, with the first spacer overlapped portion 3a1a being provided on one side of the division and the first spacer overlapping portion 3a1b being provided on the other side of the division and overlapping with the first spacer overlapped portion 3a1a as viewed in the stacking direction. With the above configuration, the first spacer overlapped portion 3a1a and the first spacer overlapping portion 3a1b abut against each other in the stacking direction, thereby suppressing misalignment between the divided sides of the first spacer wall 3a1 in the stacking direction, thereby further suppressing deviation and sum of the clearance between the first housing wall 2a1 and the second housing wall 2b1.

[0039] The second spacer wall 3b1 is divided in a division direction perpendicular to the stacking direction and has a second spacer overlapped portion 3b1a and a second spacer overlapping portion 3b1b, with the second spacer overlapped portion 3b1a being provided on one side of the division and the second spacer overlapping portion 3b1b being provided on the other side of the division and overlapping with the second spacer overlapped portion 3b1a as viewed in the stacking direction. According to the above configuration, the second spacer overlapped portion 3b1a and the second spacer overlapping portion 3b1b abut against each other in the stacking direction, thereby suppressing misalignment between the divided sides of the second spacer wall 3b1 in the stacking direction, thereby further suppressing deviation and sum of the clearance between the first housing wall 2a1 and the second housing wall 2b1.

[0040] The first housing wall 2a1 is divided in a division direction perpendicular to the stacking direction and has a first housing overlapping portion 2a1a and a first housing overlapping portion 2a1b, with the first housing overlapping portion 2a1a being provided on one side of the division and the first housing overlapping portion 2a1b being provided on the other side of the division and overlapping with the first housing overlapping portion 2a1a as viewed in the stacking direction. According to the above configuration, the first housing overlapping portion 2a1a and the first housing overlapping portion 2a1b abut against each other in the stacking direction, thereby suppressing misalignment between the divided sides of the first housing wall 2a1 in the stacking direction, thereby further suppressing deviation and sum of the clearance between the first housing wall 2a1 and the second housing wall 2b1.

[0041] The second housing wall 2b1 is divided in a division direction perpendicular to the stacking direction and has a second housing overlapped portion 2b1a and a second housing overlapping portion 2b1b, where the second housing overlapped portion 2b1a is provided on one side of the division and the second housing overlapping portion 2b1b is provided on the other side of the division and overlaps with the second housing overlapped portion 2b1a as viewed in the stacking direction. According to the above configuration, the second housing overlapped portion 2b1a and the second housing overlapping portion 2b1b abut against each other in the stacking direction, thereby suppressing misalignment between the divided sides of the second housing wall 2b1 in the stacking direction, thereby further suppressing deviation and sum of the clearance between the first housing wall 2a1 and the second housing wall 2b1.

[0042] As in this embodiment, the magnetic core 1 has a second sandwiching portion 1c, and the second magnetic portion 5 is a multi-layer magnetic body stacked in the stacking direction. The second sandwiching portion 1c may have both or either a portion sandwiched in the stacking direction between the second magnetic portion 5 and the first spacer wall 3a1 and a portion sandwiched in the stacking direction between the second magnetic portion 5 and the second spacer wall 3b1 (both in this embodiment), thereby closely contacting adjacent magnetic bodies in the second magnetic portion 5. This configuration improves the electromagnetic characteristics of the second magnetic portion 5 by closely contacting the magnetic bodies and preventing radial misalignment between the magnetic bodies due to this close contact. In this embodiment, the magnetic core 1 does not have a portion connecting both portions of the second sandwiching portion 1c, but may have a portion connecting both portions. In this embodiment, each portion of the second sandwiching portion 1c is an annular elastic member 1c1 centered on an axis extending in the stacking direction, but this is not limited thereto. In this embodiment, a plurality of second clamping portions 1c are provided, but this is not limitative.

[0043] As in this embodiment, the magnetic core 1 has a first sandwiching portion 1b, and the first magnetic portion 4 is a multi-layer magnetic body stacked in the stacking direction. The first sandwiching portion 1b may have either or both of a portion sandwiched between the first magnetic portion 4 and the first spacer wall 3a1 in the stacking direction and a portion sandwiched between the first magnetic portion 4 and the first housing wall 2a1 in the stacking direction (both in this embodiment), thereby closely contacting adjacent magnetic bodies in the first magnetic portion 4. This configuration improves the electromagnetic characteristics of the first magnetic portion 4 by closely contacting the magnetic bodies and preventing radial misalignment between the magnetic bodies due to this close contact. In this embodiment, the magnetic core 1 has a portion connecting both portions of the first sandwiching portion 1b (the portion indicated by the dashed line in FIG. 1 ). However, the magnetic core 1 may have no portion connecting both portions. In this embodiment, the first sandwiching portion 1b is an annular member centered on an axis extending in the circumferential direction, but this is not limited thereto. In this embodiment, a plurality of first clamping portions 1c are provided, but this is not limitative.

[0044] As in this embodiment, the magnetic core 1 has a third sandwiching portion 1d, and the third magnetic portion 6 is a multi-layer magnetic body stacked in the stacking direction. The third sandwiching portion 1d may have either or both of a portion sandwiched between the third magnetic portion 6 and the second spacer wall 3b1 in the stacking direction and a portion sandwiched between the third magnetic portion 6 and the second housing wall 2b1 in the stacking direction (both in this embodiment), thereby closely contacting adjacent magnetic bodies in the third magnetic portion 6. This configuration improves the electromagnetic characteristics of the third magnetic portion 6 by closely contacting the magnetic bodies and preventing radial misalignment between the magnetic bodies due to this close contact. In this embodiment, the magnetic core 1 has a portion connecting both portions of the third sandwiching portion 1d (the portion indicated by the dashed line in FIG. 1 ), but may also have a configuration without a portion connecting both portions. In this embodiment, the third sandwiching portion 1d is an annular member centered on an axis extending in the circumferential direction, but is not limited thereto. In this embodiment, a plurality of third clamping portions 1d are provided, but this is not limitative.

[0045] As in the second embodiment shown in Figures 3 to 5, the spacer portion 3 has a first spacer member 3a and a second spacer member 3b, the first spacer member 3a has a first spacer wall 3a1 and first spacer side walls 3a2 continuing to the outer peripheral edge and inner peripheral edge of the first spacer wall 3a1, the second spacer member 3b has a second spacer wall 3b1 and second spacer side walls 3b2 continuing to the outer peripheral edge and inner peripheral edge of the second spacer wall 3b1, the first spacer side walls 3a2 have first spacer wall side portions 3c1 of the spacer load transmission portions 3c, and the second spacer side walls 3b2 have second spacer wall side portions 3c2 of the spacer load transmission portions 3c, and the load may be transmitted between the first spacer wall 3a1 and the second spacer wall side portions 3c2 by abutting against each other in the stacking direction. According to the above configuration, the first spacer member 3a and the second spacer member 3b are sufficiently separated in the stacking direction, and the second magnetic portion 5 is placed in the second section S2 between the first spacer side walls 3a2 and the second spacer side walls 3b2, and then the first spacer member 3a and the second spacer member 3b are brought closer to each other, and the first spacer side walls 3a2 and the second spacer side walls 3b2 are butted together via the spacer load transmission portion 3c, thereby achieving excellent assembly ease.

[0046] In the second embodiment, the first spacer both side walls 3a2 have a first outer side wall 3a2a and a first inner side wall 3a2b, the second spacer both side walls 3b2 have a second outer side wall 3b2a and a second inner side wall 3b2b, the first outer side wall 3a2a has a protruding first spacer wall side portion 3c1 of the spacer load transmission portion 3c, the second outer side wall 3b2a has a flat second spacer wall side portion 3c2 of the spacer load transmission portion 3c that abuts against the first spacer wall side portion 3c1, the first inner side wall 3a2b has a flat first spacer wall side portion 3c1 of the spacer load transmission portion 3c, and the second inner side wall 3b2b has a protruding second spacer wall side portion 3c2 of the spacer load transmission portion 3c that abuts against the first spacer wall side portion 3c1.

[0047] In the second embodiment, the first spacer sidewalls 3a2 of the first spacer member 3a and the second spacer sidewalls 3b2 of the second spacer member 3b are attached to each other via hooking portions 3d that engage to restrict their separation in the stacking direction, and the first spacer wall-side portion 3c1 and the second spacer wall-side portion 3c2 of the spacer load-transmitting portion 3c are maintained in abutting contact with each other by the hooking portions 3d. This configuration determines the width of the second section S2 in the stacking direction, thereby separating the clearance in the second section S2 from the clearances in the other sections, thereby enhancing the effect of suppressing the deviation and sum of the clearances. In this embodiment, the hooking portions 3d are composed of hooking recesses 3d1 and hooking protrusions 3d2, but this is not limiting.

[0048] In the second embodiment, the housing 2 has a first housing member 2a and a second housing member 2b, the first housing member 2a has a first housing wall 2a1 and first housing side walls 2a2 continuing from the outer peripheral edge and inner peripheral edge of the first housing wall 2a1, the second housing member 2b has a second housing wall 2b1 and second housing side walls 2b2 continuing from the outer peripheral edge and inner peripheral edge of the second housing wall 2b1, and the first housing side walls 2a2 and the second housing side walls 2b2 abut against each other in the stacking direction.

[0049] 3, the magnetic core 1 may constitute a current sensor 7. In this case, the current sensor 7 has the magnetic core 1, and the magnetic core 1 may have an annular configuration that forms an opening 1a on the radially inner side thereof through which a conductor 8, through which a current to be measured flows, passes.

[0050] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and the above-described embodiments can be modified in various ways without departing from the gist of the present disclosure. [Explanation of symbols]

[0051] 1 magnetic core 1a opening 1b 1st sandwiching part 1c 2nd clamping part 1c1 Elastic member 1d 3rd sandwich part 2. Case 2a First housing member 2a1 1st enclosure wall 2a1a Housing first overlapping portion 2a1b First housing overlapping part 2a2 Both side walls of the first housing 2b Second housing member 2b1 Second enclosure wall 2b1a Second overlapping part of the housing 2b1b Second housing overlap 2b2 Second enclosure side walls 3 Spacer part 3a First spacer member 3a1 First spacer wall 3a1a Spacer first overlapped portion 3a1b Spacer first overlapping portion 3a2 First spacer both side walls 3a2a 1st outer peripheral side wall 3a2b First inner peripheral side wall 3a3 First load transmission part 3b Second spacer member 3b1 Second spacer wall 3b1a Spacer second overlapped portion 3b1b Second spacer overlap 3b2 Second spacer both side walls 3b2a 2nd outer peripheral side wall 3b2b Second inner wall 3b3 Second load transmission part 3c Spacer load transmission part 3c1 Wall side portion of first spacer 3c2 Wall side portion of second spacer 3d hook 3d1 Hanging recess 3d2 Convex part 4 First magnetic part 4a 1st comb tooth part 4b First fitting part 5 Second magnetic part 5a 2nd comb tooth part 5b Second fitting part 6 Third magnetic part 6a 3rd comb tooth part 6b Third fitting part 7 Current Sensor 8 Conductors S1 Section 1 S2 Section 2 S3 Section 3

Claims

1. a housing, a spacer portion, a first magnetic portion, a second magnetic portion, and a third magnetic portion; the housing has a first housing wall and a second housing wall; the spacer portion has a first spacer wall, a second spacer wall, and a spacer load transmission portion; the first housing wall, the first magnetic portion, the first spacer wall, the second magnetic portion, the second spacer wall, the third magnetic portion, and the second housing wall are stacked in this order, A magnetic core, wherein the spacer load transmission portion transmits load between the first spacer wall and the second spacer wall, thereby ensuring a clearance in the stacking direction formed by the second magnetic portion between the first spacer wall and the second spacer wall.

2. 2. The magnetic core according to claim 1, wherein the spacer load transmission portion has a first spacer wall side portion and a second spacer wall side portion, and transmits load between the first spacer wall and the second spacer wall by abutting the first spacer wall side portion and the second spacer wall side portion in the stacking direction.

3. the spacer portion includes a first spacer member and a second spacer member; the first spacer member has the first spacer wall and first side walls connected to an outer peripheral edge and an inner peripheral edge of the first spacer wall, the second spacer member has the second spacer wall and second side walls connected to the outer peripheral edge and the inner peripheral edge of the second spacer wall, the first side walls have first spacer wall side portions of the spacer load transmission portions, 3. The magnetic core according to claim 2, wherein the second side walls have second spacer wall side portions of the spacer load transmitting portions.

4. the second magnetic portion is a magnetic body having a plurality of layers stacked in the stacking direction, is divided in a division direction perpendicular to the stacking direction, and has a second comb tooth portion and a second fitting portion; the second comb tooth portion is formed by the magnetic bodies of the plurality of layers on one side of the division being shifted from each other in the division direction, 2. The magnetic core according to claim 1, wherein the second fitting portion is formed in a complementary shape to the second comb tooth portion by the multiple layers of magnetic material on the other side of the division being shifted relative to each other in the division direction, and is fitted into the second comb tooth portion.

5. 2. The magnetic core according to claim 1, further comprising a first load transmission portion that transmits load between the first housing wall and the first spacer wall, thereby ensuring a clearance in the stacking direction formed by the first magnetic portion between the first housing wall and the first spacer wall.

6. The magnetic core according to claim 5, wherein the first load transmission portion is integrally formed with the first spacer wall and transmits load between the first housing wall and the first spacer wall by abutting against the first housing wall in the stacking direction.

7. the first magnetic portion is a magnetic body having a plurality of layers stacked in the stacking direction, is divided in a division direction perpendicular to the stacking direction, and has a first comb tooth portion and a first fitting portion; the first comb tooth portion is formed by the magnetic bodies of the plurality of layers on one side of the division being shifted from each other in the division direction, 2. The magnetic core according to claim 1, wherein the first fitting portion is formed in a complementary shape to the first comb tooth portion by the magnetic material layers on the other side of the division being shifted relative to each other in the division direction, and is fitted into the first comb tooth portion.

8. 2. The magnetic core according to claim 1, further comprising a second load transmission portion that transmits load between the second housing wall and the second spacer wall, thereby ensuring a clearance in the stacking direction formed by the third magnetic portion between the second housing wall and the second spacer wall.

9. 9. The magnetic core according to claim 8, wherein the second load transmission portion is integrally formed with the second spacer wall and transmits load between the second housing wall and the second spacer wall by abutting against the second housing wall in the stacking direction.

10. the third magnetic portion is a multi-layer magnetic body stacked in the stacking direction, divided in a division direction perpendicular to the stacking direction, and has a third comb tooth portion and a third fitting portion; the third comb tooth portion is formed by the magnetic bodies of the plurality of layers on one side of the division being shifted from each other in the division direction, 2. The magnetic core according to claim 1, wherein the third fitting portion is formed in a complementary shape to the third comb tooth portion by the multiple layers of magnetic material on the other side of the division being shifted relative to each other in the division direction, and is fitted into the third comb tooth portion.

11. the first spacer wall is divided in a division direction perpendicular to the stacking direction and has a first spacer overlapped portion and a first spacer overlapping portion; the spacer first overlapped portion is provided on one side of the divided portion, The magnetic core according to claim 1 , wherein the first spacer overlapping portion is provided on the other side of the divided portions and overlaps the first spacer overlapped portion when viewed in the stacking direction.

12. the second spacer wall is divided in a division direction perpendicular to the stacking direction and has a second spacer overlapped portion and a second spacer overlapping portion, the spacer second overlapped portion is provided on one side of the divided portion, The magnetic core according to claim 1 , wherein the second spacer overlapping portion is provided on the other side of the divided portions and overlaps the second spacer overlapped portion when viewed in the stacking direction.

13. the first housing wall is divided in a division direction perpendicular to the stacking direction and has a housing first overlapped portion and a housing first overlapping portion, the first overlapped portion of the housing is provided on one side of the divided portion, The magnetic core according to claim 1 , wherein the first housing overlapping portion is provided on the other divided side and overlaps the first housing overlapped portion when viewed in the stacking direction.

14. the second housing wall is divided in a division direction perpendicular to the stacking direction and has a second housing overlapped portion and a second housing overlapping portion, the second overlapped portion of the housing is provided on one side of the divided portion, The magnetic core according to claim 1 , wherein the second housing overlapping portion is provided on the other side of the divided portion and overlaps the second housing overlapped portion when viewed in the stacking direction.

15. A second clamping portion is provided. the second magnetic unit is a multi-layer magnetic body stacked in the stacking direction, The magnetic core of claim 1, wherein the second sandwiching portion has both or either a portion sandwiched in the stacking direction between the second magnetic portion and the first spacer wall and a portion sandwiched in the stacking direction between the second magnetic portion and the second spacer wall, thereby bringing adjacent magnetic bodies in the second magnetic portion into close contact with each other.

16. A first clamping portion is provided. the first magnetic unit is a magnetic body having multiple layers stacked in the stacking direction, The magnetic core of claim 1, wherein the first sandwiching portion has both or either a portion sandwiched in the stacking direction between the first magnetic portion and the first spacer wall and a portion sandwiched in the stacking direction between the first magnetic portion and the first housing wall, thereby bringing adjacent magnetic bodies in the first magnetic portion into close contact with each other.

17. A third clamping portion is provided. the third magnetic unit is a multi-layer magnetic body stacked in the stacking direction, The magnetic core of claim 1, wherein the third sandwiching portion has both or either a portion sandwiched in the stacking direction between the third magnetic portion and the second spacer wall and a portion sandwiched in the stacking direction between the third magnetic portion and the second housing wall, thereby bringing adjacent magnetic bodies in the third magnetic portion into close contact with each other.

18. A magnetic core according to any one of claims 1 to 17, The magnetic core is annular and defines an opening radially inward through which a conductor carrying a current to be measured passes.

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