Terminal block

Abstract

A terminal block (1) is provided with a housing (50) in which a busbar holding portion (54) and a magnetic body accommodating portion (53) are integrally formed. The busbar holding portion (54) holds a busbar (10) extending in the axial direction X, and the magnetic body accommodating portion (53) accommodates a magnetic body (3) so that the magnetic body (3) is disposed around the busbar (10) held by the busbar holding portion (54). The magnetic body accommodating portion (53) is provided between a wall-shaped outer edge portion (51c) and a wall-shaped inner edge portion (51d) provided inward of the outer edge portion (51c). The inner edge portion (51d) is provided between the busbar (10) and the magnetic body accommodating portion (53).

Description

Terminal block

[0001] The present invention relates to a terminal block.

[0002] As a conventional technique related to terminal blocks, for example, Patent Document 1 discloses a terminal block including a bus bar electrically connected to an inverter, a relay terminal electrically connected to the bus bar, and a housing holding the relay terminal. The bus bar is provided with a current sensor that detects a current flowing through the bus bar. The current sensor is provided around the flat plate portion of the bus bar and includes a magnetic body that is C-shaped ferrite.

[0003] Japanese Unexamined Patent Application Publication No. 2022-98336

[0004] Incidentally, such a terminal block is assembled, for example, by assembling the relay terminal to the housing, separately assembling a current sensor including a magnetic body to the bus bar, and then assembling the bus bar and the relay terminal together. In this case, the number of assembly steps for the terminal block may increase. In this respect, there is still room for further improvement in the configuration of the terminal block.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a terminal block capable of reducing the number of assembly steps.

[0006] In order to achieve the above object, the terminal block of the present invention includes: a housing integrally formed with a bus bar holding portion that holds a bus bar extending in an axial direction, and a magnetic body accommodating portion that accommodates a magnetic body such that the magnetic body is arranged around the bus bar held by the bus bar holding portion, wherein the magnetic body accommodating portion is provided between an outer edge portion formed in a wall shape and an inner edge portion provided inside the outer edge portion and formed in a wall shape, and the inner edge portion is provided between the bus bar and the magnetic body accommodating portion.

[0007] The terminal block according to the present invention exhibits an effect that the number of assembly steps can be reduced.

[0008] FIG. 1 is a perspective view illustrating a schematic configuration of the terminal block according to the embodiment. FIG. 2 is an exploded perspective view illustrating a schematic configuration of the terminal block according to the embodiment. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1, including a mating terminal block.

[0009] Embodiments of the present invention will be described in detail below with reference to the drawings. However, the present invention is not limited by these embodiments. Furthermore, some of the components in the following embodiments may be easily substituted or substantially identical to those that are easily substituted by those skilled in the art.

[0010] [Embodiment] The terminal block 1 of this embodiment, shown in Figures 1 to 3, is mounted on a vehicle such as an electric vehicle or a hybrid vehicle, and is attached to a mounting target 70 shown by a dashed line in Figure 3, and relays the electrical connection between a first device and a second device (not shown). The terminal block 1 of this embodiment is configured as a male terminal block including a plurality of busbars 10. The terminal block 1 is formed to be mated with a mating terminal block 100 (see Figure 3) provided on the first device. In this embodiment, the mating terminal block 100 is configured as a female terminal block. A first connection portion 11 (see Figures 2 and 3) provided on one end of the plurality of busbars 10 is electrically connected to a busbar connection portion (not shown) provided on the mating terminal block 100. The connection portion of the mating terminal block 100 can be in the shape of a female terminal. The second connection portion 12 provided on the other end of the plurality of busbars 10 is electrically connected to the external terminal 75 (see Figure 3) of the second device.

[0011] The first device is, for example, one of a motor and an inverter, and the second device is, for example, the other of a motor and an inverter. The terminal block 1 is not limited to this example and may be used, for example, to connect the first or second device to a cable, or to connect two cable components.

[0012] In the following explanation, the direction in which the busbar 10 extends is defined as the axial direction X, the direction in which multiple busbars 10 are arranged perpendicular to and intersecting the axial direction X is defined as the arrangement direction Y, and the direction perpendicular to and intersecting the axial direction X and the arrangement direction Y is defined as the height direction Z. Furthermore, one side of the axial direction X is defined as side X1, and the other side as side X2. Similarly, in the arrangement direction Y, side Y1 and side Y2 are defined, and in the height direction Z, side Z1 and side Z2 are defined.

[0013] As shown in Figure 2, the terminal block 1 comprises a plurality of busbars 10, a cover member 2, a magnetic material 3, and a housing 50. The busbars 10 extend in the axial direction X and are made of a conductive metal material. The busbars 10 are formed integrally by, for example, pressing a metal plate to the shape corresponding to each part. The first connecting portion 11 on one side X1 in the axial direction X of the busbar 10 is formed in a cylindrical shape, and the pin portion 15a of the assembly member 15, which will be described later, is inserted and assembled into it. The second connecting portion 12 on the other side X2 in the axial direction X of the busbar 10 is formed in a substantially plate shape with the plate surface facing the height direction Z. A through hole is provided in the second connecting portion 12.

[0014] As shown in Figure 2, the magnetic material 3 is formed in a substantially cylindrical shape, and the outer and inner shapes are substantially rounded rectangular shapes, with the arrangement direction Y being the longitudinal direction when viewed from the axial direction X. In this embodiment, the magnetic material 3 is made of ferrite. Here, the busbar 10 is a circuit body (conductor) that constitutes a high-voltage circuit system, such as a high-voltage battery pack mounted on a vehicle. The terminal block 1 equipped with the magnetic material 3 can effectively remove high-frequency noise in the busbar 10 and effectively suppress surge voltages.

[0015] As shown in Figures 1 to 3, the housing 50 has a housing body 51 that is formed in a substantially cylindrical shape. As shown in Figure 1, the outer surface 51a and inner surface 51b of the housing body 51 are both substantially rounded rectangular shapes when viewed from the axial direction X, with the arrangement direction Y being the longitudinal direction. The internal space surrounded by the inner surface 51b of the substantially cylindrical housing body 51 is an opening 52 that penetrates along the axial direction X. As shown in Figures 2 and 3, a magnetic material housing section 53 for housing the magnetic material 3 is provided around the opening 52. The magnetic material housing section 53 is provided so that the magnetic material 3 is arranged around a plurality of busbars 10 arranged along the arrangement direction Y. In other words, the plurality of busbars 10 are arranged inside the magnetic material 3. The magnetic material housing section 53 is formed along the outer surface 51a and inner surface 51b of the housing body 51. In other words, the magnetic material housing portion 53 is formed in a roughly rounded rectangular shape, with the arrangement direction Y being the longitudinal direction when viewed from the axial direction X.

[0016] As shown in Figure 3, the housing body 51 has an outer edge portion 51c and an inner edge portion 51d. The outer edge portion 51c has a part of the outer surface of the outer surface 51a of the housing body 51 and is formed in a wall shape. The inner edge portion 51d is located inside the outer edge portion 51c and has a part of the inner surface of the inner surface 51b of the housing body 51 and is formed in a wall shape. Both the outer edge portion 51c and the inner edge portion 51d are formed in a substantially rounded rectangular shape with the arrangement direction Y as the longitudinal direction. The magnetic material housing portion 53 is provided between the outer edge portion 51c and the inner edge portion 51d. The inner edge portion 51d is provided between the busbar 10 and the magnetic material housing portion 53. In other words, the opening hole 52 and the magnetic material housing portion 53 are spaces separated by the inner edge portion 51d. The opening hole 52 is formed inside the inner edge portion 51d and the busbar 10 is inserted through it. The magnetic material housing portion 53 is formed in an annular shape around the opening hole 52.

[0017] As shown in Figure 3, the magnetic material housing section 53 has an insertion opening 53a on one side X1 in the axial direction X into which the magnetic material 3 is inserted. The magnetic material housing section 53 has a flat bottom portion 53b on the other side X2 in the axial direction X (in other words, the opposite side of the insertion opening 53a along the axial direction X) into which the flat end face of the other side X2 of the magnetic material 3 abuts. The magnetic material housing section 53 is defined by an outer edge portion 51c, an inner edge portion 51d, and a bottom portion 53b. The magnetic material 3 is housed and fixed in the magnetic material housing section 53 by being held between projections (not shown) provided inside the magnetic material housing section 53.

[0018] As shown in Figure 3, the housing 50 (housing body 51) is provided with a busbar holding portion 54 for holding the busbars 10. The busbar holding portion 54 is provided on the other side X2 in the axial direction X of the opening hole 52. Multiple busbar holding portions 54 are provided side by side along the arrangement direction Y. Multiple busbars 10 are held adjacent to each other in the arrangement direction Y by the multiple busbar holding portions 54 provided side by side along the arrangement direction Y.

[0019] An assembly member 15 is attached to the busbar 10. As shown in Figures 2 and 3, the assembly member 15 has a pin portion 15a that is long in the axial direction X, and a base portion 15b provided on the base end side (the other side X2 in the axial direction X) of the pin portion 15a. As described above, the pin portion 15a is inserted into the substantially cylindrical first connecting portion 11 of the busbar 10. The base portion 15b is formed in the shape of a substantially rectangular parallelepiped block. As shown in Figure 3, a concave step portion 15b1 is formed on the other side X2 in the axial direction X of the base portion 15b. The substantially plate-shaped portion on the other side X2 in the axial direction X of the busbar 10 is inserted through the base portion 15b. In this way, the assembly member 15 is in contact with the busbar 10.

[0020] The busbar holding portion 54 is provided with receiving portions 54a and 54b that receive the surface of the base portion 15b of the assembly member 15 on the other side X2 in the axial direction X and contact the surface of the base portion 15b. The receiving portions 54a and 54b are each formed to protrude toward each other along the height direction Z. Receiving portion 54a is provided on the other side Z2 in the height direction Z, and receiving portion 54b is provided on one side Z1 in the height direction Z. A gap 54d is formed between the receiving portions 54a and 54b. The gap 54d is formed in a tapered shape on the other side X2 in the axial direction X, so that the dimension in the height direction Z gradually narrows. The substantially plate-shaped portion of the busbar 10 on the other side X2 in the axial direction X passes through the gap 54d, and the second connecting portion 12 is exposed to the outside. A sealing member 18 provided on the outer circumference of the busbar 10 is arranged in the gap 54d.

[0021] Furthermore, on one side Z1 of the receiving portion 54b in the height direction Z, a convex step portion 54c is formed on one side X1 in the axial direction X that fits with the step portion 15b1 of the base portion 15b. The assembly member 15 holds the busbar 10 and is fixed to the busbar holding portion 54 by engaging with the receiving portions 54a, 54b and the step portion 54c. As the assembly member 15 is fixed to the busbar holding portion 54, the sealing member 18 is pressed down by the assembly member 15. The sealing member 18 seals around the busbar 10 on the second connection portion 12 side.

[0022] Furthermore, the busbar 10 is assembled to the assembly member 15. Therefore, when the assembly member 15 is fixed to the busbar holding portion 54, the busbar 10 is held in the busbar holding portion 54 so that it is inserted through the opening hole 52. The inner edge portion 51d is then positioned between the busbar 10 and the magnetic material housing portion 53.

[0023] On the other side X2 in the axial direction X of the receiving portion 54a, a substantially plate-shaped support plate portion 56 is provided with its plate surface facing the height direction Z. The support plate portion 56 is integrally formed with the housing 50 (housing body 51). The support plate portion 56 is provided with a nut holding portion 56a for holding a nut 4. The nut 4 is a square corner nut. The support plate portion 56 is inserted through the mounting object 70 and is exposed. The hole in the nut 4 held by the nut holding portion 56a communicates with the through hole in the second connection portion 12 of the busbar 10. The second connection portion 12 of the busbar 10 is electrically connected by fixing an external terminal 75 with a bolt (not shown) that screws into the nut 4.

[0024] As shown in Figure 3, an annular seal groove 58 for assembling the seal member 5 is provided on the other side X2 in the axial direction X of the housing body 51 of the housing 50. The seal groove 58 is formed as a recessed groove that opens to the other side X2 in the axial direction X. As shown in Figure 2, the seal member 5 is formed as an annular shape that is a substantially elongated rectangle with a long length in the arrangement direction Y. As shown in Figure 3, the seal member 5 assembled in the seal groove 58 seals the space between the terminal block 1 and the mounting target 70 when the terminal block 1 is attached to the mounting target 70.

[0025] As shown in Figure 3, the housing 50 has a plurality of partition plates 57 interposed between busbars 10 that are held adjacent to each other in the arrangement direction Y by a plurality of busbar holding portions 54. The partition plates 57 are formed in a substantially plate shape with their plate surfaces facing the arrangement direction Y. The partition plates 57 are formed integrally with the housing 50 (housing body 51). The partition plates 57 have a first partition plate 57a provided in the opening hole 52 and a second partition plate 57b provided on the support plate portion 56. The first partition plate 57a is provided so as to connect opposing inner surfaces 51b along the height direction Z. The first partition plate 57a divides the opening hole 52 into a plurality of spaces along the arrangement direction Y, separating adjacent busbars 10 in the arrangement direction Y. The first partition plate 57a is mainly interposed between adjacent busbars 10 on the first connection portion 11 side (one side X1 in the axial direction X). The second partition plate 57b is exposed from the housing body 51 and separates the second connection portion 12 side and the nut holding portion 56a side of adjacent busbars 10 in the arrangement direction Y. The second partition plate 57b is mainly interposed between adjacent busbars 10 on the second connection portion 12 side (the other side X2 in the axial direction X).

[0026] As shown in Figure 1, the housing body 51 of the housing 50 is provided with a flat plate rib-shaped fixing portion 55 that protrudes from the outer surface 51a of the housing body 51 in a direction intersecting the axial direction X. The fixing portion 55 is provided on the other side X2 of the housing body 51 in the axial direction X. The fixing portion 55 is formed in a substantially plate shape with its plate surface facing the axial direction X. The fixing portion 55 protrudes from the outer surface 51a of the housing body 51 and is formed integrally with the housing 50 (housing body 51). The fixing portion 55 is for attachment to the mounting target 70. The fixing portion 55 has a first fixing portion 55a on one side Y1 in the arrangement direction Y of the housing body 51 and a second fixing portion 55b on the other side Y2. The first fixing portion 55a has one through hole 55a1 into which the collar 7a (see Figure 2) is press-fitted and fixed. Furthermore, the first fixing portion 55a is provided with a terminal housing portion 55a2 in which a terminal 8 (see Figure 2) is housed. The second fixing portion 55b has two through holes 55b1, and a collar 7b (see Figure 2) is press-fitted into each of the through holes 55b1 and fixed in place.

[0027] As shown in Figure 3, the housing 50 is positioned such that the other side X2 of the fixing portion 55 in the axial direction X faces the mounting surface 71 of the mounting target 70. A reinforcing member 6 (see also Figure 2) is provided between the other side X2 of the fixing portion 55 in the axial direction X and the mounting surface 71 of the mounting target 70. The fixing portion 55 is fixed to the mounting target 70 by bolts (not shown) inserted through the through holes 55a1 and 55b1 and screwed into the female threaded portion (not shown) of the mounting target 70. In this way, the housing 50 is fixed to the mounting target 70.

[0028] As shown in Figure 2, the reinforcing member 6 is formed in a plate shape using sheet metal or the like with the arrangement direction Y as the longitudinal direction, and has holes corresponding to the through holes 55a1 and 55b1, with the central part open with the arrangement direction Y as the longitudinal direction so that the support plate portion 56 etc. can be inserted through it. The reinforcing member 6 is interposed between the fixing portion 55 and the mounting target 70 when attaching the housing 50 to the mounting target 70, and reinforces the fixing portion 55.

[0029] The housing 50 has at least a busbar holding portion 54 and a magnetic material housing portion 53 integrally formed. More specifically, the housing 50 is integrally formed by resin injection molding or the like, including the housing body 51 which includes an outer edge portion 51c and an inner edge portion 51d, an opening hole 52, a busbar holding portion 54, a magnetic material housing portion 53, a seal groove 58, etc., as well as a support plate portion 56 which includes a fixing portion 55 and a nut holding portion 56a, a partition plate 57, etc.

[0030] As shown in Figure 2, the outer and inner shapes of the cover member 2 are formed as a roughly rounded rectangular shape when viewed from the axial direction X. The inside of the open-hole-shaped cover member 2 is a terminal block insertion opening 2a into which the mating terminal block 100 into which the terminal block 1 is fitted is inserted. One side X1 and the other side X2 of the cover member 2 in the axial direction X are formed as flat surfaces. As shown in Figure 3, the edge of the cover member 2 facing the terminal block insertion opening 2a is provided with an inclined portion 2b that slopes downward from one side X1 to the other side X2 in the axial direction X.

[0031] As shown in Figure 3, the cover member 2 is provided on one side X1 in the axial direction X of the housing 50 so as to cover the insertion opening 53a. The other side X2 of the cover member 2 in the axial direction X is in contact with the flat end face of the outer edge 51c on one side X1 in the axial direction X, and the flat end face of the inner edge 51d on one side X1 in the axial direction X. The flat end face of the magnetic material 3 on one side X1 in the axial direction X can be brought close to or in contact with the other side X2 of the cover member 2 in the axial direction X. The magnetic material 3 can also be configured to be sandwiched between the cover member 2 and the bottom 53b by contact, and fixed to the magnetic material housing 53.

[0032] The terminal block insertion opening 2a of the cover member 2 and the opening hole 52 of the housing 50 are substantially the same shape and are in communication with each other. The cover member 2 is fixed to the housing 50 (housing body 51). The cover member 2 can be fixed with adhesive or the like. As a means of fixing the cover member 2 to the housing 50, for example, a locking structure can be adopted in which a claw-shaped or the like locking part is provided on one of the cover member 2 and the housing 50, and a hole-shaped or the like locking part is provided on the other.

[0033] As shown in Figure 3, the mating terminal block 100 is inserted through the terminal block insertion opening 2a of the cover member 2 and fitted with the terminal block 1. At this time, the inclined portion 2b of the cover member 2 aligns the tip of the fitting portion of the mating terminal block 100, so that the mating terminal block 100 and the terminal block 1 can be fitted together smoothly. When the mating terminal block 100 and the terminal block 1 are fitted together, the connection portion of the busbar (not shown) of the mating terminal block 100, which is a female terminal, is electrically connected to the first connection portion 11 of the busbar 10, which is a male terminal.

[0034] The terminal block 1 described above comprises a housing 50 integrally formed with a busbar holding portion 54 for holding a busbar 10 extending in the axial direction X, and a magnetic material housing portion 53 for housing a magnetic material 3 such that the magnetic material 3 is arranged around the busbar 10 held by the busbar holding portion 54. The magnetic material housing portion 53 is provided between an outer edge portion 51c formed in the shape of a wall and an inner edge portion 51d provided inside the outer edge portion 51c and also formed in the shape of a wall, and the inner edge portion 51d is provided between the busbar 10 and the magnetic material housing portion 53.

[0035] As a result, the housing 50 of the terminal block 1 has the busbar holding portion 54 and the magnetic material housing portion 53 integrally formed. Then, the assembly of the terminal block 1 only requires attaching the magnetic material 3, busbars 10, sealing members 5, etc. to the housing 50. Therefore, the terminal block 1 can reduce the number of assembly steps.

[0036] For example, the housing body, which includes a magnetic material housing section in which the magnetic material is contained, and the busbar holding section, which includes partition plates and support plates (nut holding sections), may be formed as separate components. In this case, it is necessary to assemble the magnetic material housing section (housing body) and the busbar holding section. Consequently, when assembling the terminal block 1, the work of assembling the magnetic material housing section (housing body) and the busbar holding section is required. However, according to this embodiment, the work of assembling the magnetic material housing section (housing body) and the busbar holding section, as well as the number of parts, are reduced.

[0037] Furthermore, when the housing body and the busbar holding portion are formed as separate components, the busbar holding portion is provided with a shape for housing and assembling the housing body, for example, a wall-like portion formed in the shape of a roughly rounded rectangular ring. In that case, the terminal block may become large. However, the terminal block 1 according to this embodiment omits the shape for housing and assembling the housing body, such as the annular wall-like portion, so it can be made compact.

[0038] Furthermore, the terminal block 1 includes a cover member 2 provided on one side X1 in the axial direction X of the housing 50, and the magnetic material housing section 53 has an insertion opening 53a on one side X1 in the axial direction X into which the magnetic material 3 is inserted, and a bottom portion 53b on the other side X2 in the axial direction X that the magnetic material 3 abuts against, and the cover member 2 is provided so as to cover the insertion opening 53a. As a result, the insertion opening 53a can be covered by simply providing the cover member 2 on one side X1 in the axial direction X of the housing 50.

[0039] Furthermore, multiple busbar holding portions 54 are provided in the arrangement direction Y, and the housing 50 has partition plates 57 interposed between the busbars 10 that are held adjacent to each other in the arrangement direction Y by the multiple busbar holding portions 54. This allows the housing 50 and the partition plates 57 to be formed as a single unit, further reducing the number of assembly steps.

[0040] Furthermore, the housing 50 has a nut holding portion 56a that holds a nut 4 into which a bolt for electrically connecting the busbar 10 and the external terminal 75 is screwed. This allows the nut holding portion 56a for fastening the busbar 10 and the external terminal 75 with a bolt to be formed integrally with the housing 50, further reducing the number of assembly steps.

[0041] Furthermore, the housing 50 is formed to protrude in a direction intersecting the axial direction X and has a fixing portion 55 for attachment to the mounting target 70. This allows the fixing portion 55, which is easily accessible to the worker due to its protrusion, to be integrally formed with the housing 50, and further reduces the number of assembly steps.

[0042] Furthermore, the housing 50 has an opening hole 52 formed inside the inner edge portion 51d through which the bus bar 10 is inserted, and the magnetic body accommodating portion 53 is formed in an annular shape around the opening hole 52. Accordingly, the magnetic body 3 can be arranged so as to surround the periphery of the plurality of bus bars 10 provided side by side along the arrangement direction Y. Therefore, while reducing the number of assembly steps compared to the case where the magnetic body 3 is provided for each individual bus bar 10, the generation of noise for the plurality of bus bars 10 can be appropriately suppressed.

[0043] It should be noted that the terminal block according to the embodiment of the present invention described above is not limited to the above-described embodiment, and various modifications can be made within the scope described in the claims.

[0044] In the above description, the bus bar 10 and the magnetic body 3 are assembled to the housing 50 to form the terminal block 1, but for example, the bus bar 10 and the magnetic body 3 can also be assembled to the housing 50 by insert molding. Further, although the magnetic body 3 used herein is formed in a substantially rounded rectangular shape, the shape of the magnetic body 3 is not limited by the present embodiment. For example, a C-shaped magnetic body 3 or a plurality of divided magnetic bodies 3 may be arranged around the plurality of bus bars 10. Furthermore, the terminal block 1 is not limited to the case where a plurality of bus bars 10 are provided, and may be configured with a single bus bar 10.

[0045] The terminal block according to the present embodiment may be configured by appropriately combining the components of the embodiments and modifications described above.

[0046] 1 : terminal block 2 : cover member 3 : magnetic body 4 : nut 10 : bus bar 50 : housing 51c : outer edge portion 51d : inner edge portion 52 : opening hole 53 : magnetic body accommodating portion 53a : insertion opening 53b : bottom portion 54 : bus bar holding portion 55 : fixing portion 56a : nut holding portion 57 : partition plate 70 : attachment target 75 : external terminal X : axial direction Y : arrangement direction Z : height direction

Claims

1. A terminal block comprising: a housing integrally formed with a busbar holding portion for holding a busbar extending in the axial direction, and a magnetic material housing portion for housing a magnetic material such that the magnetic material is arranged around the busbar held by the busbar holding portion, wherein the magnetic material housing portion is provided between a wall-shaped outer edge portion and a wall-shaped inner edge portion provided inward from the outer edge portion, and the inner edge portion is provided between the busbar and the magnetic material housing portion.

2. The terminal block according to claim 1, comprising a cover member provided on one side of the housing in the axial direction, wherein the magnetic material housing portion has an insertion opening on one side in the axial direction into which the magnetic material is inserted, and a bottom portion on the other side in the axial direction into which the magnetic material abuts, and the cover member is provided so as to cover the insertion opening.

3. The terminal block according to claim 1, wherein a plurality of busbar holding portions are provided in an arrangement direction intersecting the axial direction, and the housing has partition plates interposed between the busbars that are held adjacent to each other in the arrangement direction by the plurality of busbar holding portions.

4. The terminal block according to claim 1, wherein the housing has a nut holding portion that holds a nut into which a bolt for electrically connecting the busbar and the external terminal is screwed.

5. The terminal block according to claim 1, wherein the housing is formed to protrude in a direction intersecting the axial direction and has a fixing portion for attachment to an object.

6. The terminal block according to any one of claims 1 to 5, wherein the housing has an opening formed on the inner side of the inner edge through which the busbar is inserted, and the magnetic material housing is formed in an annular shape around the opening.

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