Method for manufacturing terminal block and bus bar terminal

Abstract

The purpose of the present invention is to enable noise reduction in a terminal block with a compact structure. The terminal block includes a conductive path forming body including a bus bar terminal, an annular magnet core, and an insulating base. The conductive path forming body includes a first connection portion, a second connection portion, and an intermediate portion between the first connection portion and the second connection portion, and the first connection portion and the second connection portion expand more than the intermediate portion when viewed along an extension direction of the intermediate portion. The magnet core includes a plurality of divided cores, and the magnet core surrounds the intermediate portion in a state where the plurality of divided cores are disposed in a ring shape. The insulating base holds the intermediate portion and the magnet core surrounding the intermediate portion in a state in which at least a portion of the first connection portion and at least a portion of the second connection portion are exposed.

Description

Technical Field

[0001] This invention relates to a method for manufacturing terminal blocks and busbar terminals. Background Technology

[0002] Patent document 1 discloses a terminal block comprising: a housing having a resin portion; and a busbar having an embedded portion embedded in the resin portion and a connecting portion protruding outward from the resin portion. Existing technical documents Patent documents

[0003] Patent Document 1: International Publication No. 2017 / 154543 Summary of the Invention The problem that the invention aims to solve

[0004] In terminal blocks, noise reduction is required to be achieved with a small structure.

[0005] Therefore, the object of the present invention is to enable noise reduction in a small structure within the terminal block. Solution for solving the problem

[0006] The terminal block of the present invention comprises: a conductive path forming body including a bus terminal; an annular magnetic core; and an insulating base for holding the conductive path forming body and the magnetic core. The conductive path forming body includes a first connecting portion, a second connecting portion, and an intermediate portion between the first connecting portion and the second connecting portion. When viewed along the extension direction of the intermediate portion, the first connecting portion and the second connecting portion extend further than the intermediate portion. The magnetic core includes a plurality of segmented cores. With the plurality of segmented cores arranged in an annular manner, the magnetic core surrounds the intermediate portion. The insulating base maintains the magnetic core surrounding the intermediate portion and the intermediate portion in a state where at least a portion of the first connecting portion and at least a portion of the second connecting portion are exposed.

[0007] In addition, the method for manufacturing the bus terminal of the present invention involves preparing a cylindrical metal part, stamping the end of the cylindrical metal part into a flat shape, bending the cylindrical metal part, and positioning the end of the cylindrical metal part at a position offset from the extension line of the middle portion of the cylindrical metal part. Invention Effects

[0008] According to the present invention, noise reduction can be achieved in a small structure in the terminal block.

[0009] In addition, it is possible to manufacture bus terminals suitable for the aforementioned terminal blocks. Attached Figure Description

[0010] Figure 1This is a perspective view of the terminal block in Embodiment 1. Figure 2 This is the front view of the terminal block. Figure 3 This is an exploded perspective view of the terminal block. Figure 4 This is an exploded perspective view of the terminal block. Figure 5 It means Figure 2 VV-line sectional view. Figure 6 yes Figure 2 Sectional view along line VI-VI. Figure 7 This is an explanatory diagram showing the manufacturing method of busbar terminals. Figure 8 This is an explanatory diagram showing the manufacturing method of busbar terminals. Figure 9 This is an explanatory diagram showing the manufacturing method of the terminal block. Figure 10 This is an explanatory diagram showing the manufacturing method of the terminal block. Figure 11 This is an explanatory diagram showing the manufacturing method of the terminal block. Figure 12 This is a perspective view of a modified terminal block. Figure 13 It is a three-dimensional diagram showing the internal structure of the terminal block. Figure 14 This is a perspective view of the terminal block in embodiment 2. Figure 15 It is a three-dimensional diagram showing the internal structure of the terminal block. Figure 16 yes Figure 15 XVI-XVI line sectional view. Figure 17 yes Figure 15 Sectional view along line XVII-XVII. Detailed Implementation

[0011] (Description of embodiments of the present invention) First, embodiments of the present invention will be described.

[0012] The terminal block of the present invention is as follows.

[0013] (1) A terminal block comprising: a conductive path forming body including a bus terminal; an annular magnetic core; and an insulating base for holding the conductive path forming body and the magnetic core, the conductive path forming body including a first connecting portion, a second connecting portion, and an intermediate portion between the first connecting portion and the second connecting portion, wherein, when viewed along the extension direction of the intermediate portion, the first connecting portion and the second connecting portion extend further than the intermediate portion, the magnetic core including a plurality of segmented cores, wherein the magnetic core surrounds the intermediate portion when the plurality of segmented cores are arranged in an annular manner, and the insulating base maintains the magnetic core surrounding the intermediate portion and the intermediate portion in a state such that at least a portion of the first connecting portion and at least a portion of the second connecting portion are exposed.

[0014] According to this terminal block, the magnet core includes multiple segmented cores. Therefore, by assembling the multiple segmented cores around a central portion smaller than the expansions of the first and second connecting portions, a state can be formed where the central portion is surrounded by the magnet core. By surrounding the central portion of the conductive path forming body with a ring-shaped magnet core, noise can be reduced. Alternatively, the first or second connecting portion may not be inserted into the ring-shaped magnet core, thus reducing the inner circumference of the magnet core. Combined with the magnet core surrounding the necked central portion, the magnet core can be miniaturized.

[0015] (2) In the terminal block of (1), the inner periphery of the magnet core may be formed in a shape that restricts the passage of the first connecting part and the second connecting part while allowing the passage of the intermediate part.

[0016] This makes it easier to bring the magnet core closer to the center. This allows for miniaturization of the magnet and improved noise reduction.

[0017] (3) In the terminal block of (1) or (2), the bus terminal may be a stamped part of a single metal piece.

[0018] Therefore, bus terminals can be easily manufactured.

[0019] (4) In any of the terminal blocks in (1) to (3), the conductive path forming body may include a plurality of bus terminals, each of the plurality of bus terminals including a first bus end, a second bus end, and a bus intermediate portion between the first bus end and the second bus end, the plurality of bus intermediate portions extending parallel to each other at intervals, such that at least one of the plurality of first bus ends extends in a direction intersecting the plurality of bus intermediate portions in such a way that the first connecting portion extends larger than the intermediate portion, and such that at least one of the plurality of second bus ends extends in a direction intersecting the plurality of bus intermediate portions in such a way that the second connecting portion extends larger than the intermediate portion.

[0020] Therefore, depending on the layout of the connecting components of the busbar terminals, the ends of the first and second busbars can be bent relative to the middle portion of the busbar. In this case, the first and second connecting portions sometimes extend further than the middle portion. In such a case, a small magnet core with a small inner circumference can be arranged around the middle portion.

[0021] (5) In any of the terminal blocks in (1) to (4), the conductive path forming body may include a cylindrical bus terminal as the bus terminal, the cylindrical bus terminal including a flat end and a cylindrical intermediate portion that is closer to a cylinder than the flat end, the end of the cylindrical intermediate portion being bent, and the flat end extending in a direction intersecting the extending direction of the intermediate portion in the cylindrical intermediate portion.

[0022] In this case, the cylindrical middle section can be easily bent in any direction. Therefore, the flat end can be easily machined to extend in any direction.

[0023] (6) In any of the terminal blocks in (1) to (5), the conductive path forming body may include a cylindrical bus terminal as the bus terminal, the cylindrical bus terminal including a flat end and a cylindrical intermediate portion that is closer to a cylinder than the flat end, the flat end being bent in its thickness direction, and the top end of the flat end extending in a direction intersecting the extension direction of the cylindrical intermediate portion.

[0024] In this case, by machining the flat end relative to the cylindrical middle part in any direction, it is easy to machine the flat end to extend in any direction.

[0025] (7) In any of the terminal blocks in (1) to (6), the conductive path forming body may include a first cylindrical bus terminal and a second cylindrical bus terminal as the bus terminal, each of the first cylindrical bus terminal and the second cylindrical bus terminal including a flat end and a cylindrical intermediate portion closer to a cylinder than the flat end, the cylindrical intermediate portions of the first cylindrical bus terminal and the second cylindrical bus terminal extending in a parallel state with a gap between them, and the ends of the cylindrical intermediate portions of the first cylindrical bus terminal and the second cylindrical bus terminal or the flat end are bent at the same position in the extension direction of the plurality of cylindrical intermediate portions.

[0026] Therefore, by bending the ends or flat ends of the cylindrical intermediate portions of the first and second cylindrical bus terminals at the same position in the extending direction of the plurality of cylindrical intermediate portions, the flat ends of the first and second cylindrical bus terminals can be easily positioned for connection with the connecting component. This prevents compression of the space for the magnet core. Furthermore, it allows for a larger magnet core in the extending direction of the plurality of cylindrical intermediate portions.

[0027] (8) In any of the terminal blocks in (1) to (7), the magnet core may also include a magnetic filler between the plurality of said segmented cores.

[0028] In this case, the noise reduction performance is improved because the magnetic filler between the multiple segmented cores suppresses the air gap.

[0029] Furthermore, the method for manufacturing the bus terminal of the present invention is as follows.

[0030] (9) A method for manufacturing a bus terminal, comprising preparing a cylindrical metal part, stamping the end of the cylindrical metal part into a flat shape, bending the cylindrical metal part, and positioning the end of the cylindrical metal part at a position offset from the extension line of the middle portion of the cylindrical metal part.

[0031] In this way, by stamping the end of the cylindrical metal part into a flat shape, it is easy to make the flat end contact the surface of the connecting component for connection. By bending the cylindrical part in any direction or arbitrarily setting the flat direction relative to the cylindrical part, it is easy to set the flat part of the end of the cylindrical metal part in any direction relative to the extension direction of the middle part.

[0032] (Details of embodiments of the present invention) The following describes specific examples of the manufacturing method of the terminal block and busbar terminal of the present invention with reference to the accompanying drawings. It should be noted that the present invention is not limited to these examples, but is intended to include all modifications within the meaning and scope equivalent to the claims, as shown in the claims.

[0033] (Implementation Method 1) The terminal block 20 of Embodiment 1 will be described below. Figure 1 This is a perspective view of terminal block 20. Figure 2 This is a front view showing the terminal block 20. Figure 2 In the diagram, the housing 11 of the device 10 with fixed terminal block 20, the connecting terminals 14 and 15 for connecting other components, and the wiring components 16 and 17 are indicated by double-dotted lines. Figure 3 and Figure 4 This is an exploded perspective view of terminal block 20. Figure 5 yes Figure 2 VV-line sectional view, Figure 6 yes Figure 2 Sectional view along line VI-VI.

[0034] <Regarding the overall structure of the terminal block> Terminal block 20 is mounted on housing 11 of device 10. Device 10 is, for example, a rotary motor or inverter. Housing 11 is a shell covering the internal components of device 10. Mounting holes 11h are formed in housing 11. Terminal block 20 is mounted around the mounting holes 11h in housing 11. Terminal block 20 electrically connects electrical components inside device 10 and electrical components outside device 10 via mounting holes 11h.

[0035] For example, device 10 is a rotating electric machine, and terminal block 20 is sometimes used as a component to electrically connect electrical components inside the rotating electric machine to an inverter outside the rotating electric machine. In this case, it is sometimes necessary to remove noise from the drive current through terminal block 20. In particular, when the inverter uses SiC (silicon carbide) semiconductors, the noise level may increase. This terminal block 20 includes a magnet core 50 and has a structure for removing noise from the drive current through terminal block 20.

[0036] The terminal block 20 includes a conductive path forming body 30, a magnet core 50, and an insulating base 60.

[0037] The conductive path forming body 30 is the portion that forms a conductive path connecting the inside and outside of the device 10. In this embodiment, the conductive path forming body 30 includes a plurality of (here, three) bus terminals 40A, 40B, and 40C. The conductive path forming body may also be a structure that includes only a single bus terminal.

[0038] The conductive path forming body 30 includes a first connecting portion 32, a second connecting portion 34, and an intermediate portion 36 between the first connecting portion 32 and the second connecting portion 34. The first connecting portion 32 and the second connecting portion 34 are portions that connect to electrical components on the inner or outer side of the device 10. The intermediate portion 36 is the portion that electrically connects the first connecting portion 32 and the second connecting portion 34.

[0039] When the conductive path forming body 30 includes a plurality of bus terminals 40A, 40B, and 40C, the first connecting portion 32 is a portion including a plurality of one-side ends of the plurality of bus terminals 40A, 40B, and 40C (the first bus ends 42A, 42B, and 42C described later). Similarly, the second connecting portion 34 is a portion including a plurality of the other-side ends of the plurality of bus terminals 40A, 40B, and 40C (the second bus ends 44A, 44B, and 44C described later), and the intermediate portion 36 is a portion including a plurality of intermediate portions of the plurality of bus terminals 40A, 40B, and 40C (the bus intermediate portions 46A, 46B, and 46C described later).

[0040] Viewed along the extending direction A of the middle portion 36, the first connecting portion 32 and the second connecting portion 34 extend further than the middle portion 36. Therefore, it is easy to configure the first connecting portion 32 and the second connecting portion into a layout suitable for connecting to the connecting terminal 14 or the connecting terminal 15. In addition, by making the middle portion 36 a structure that is narrower than the first connecting portion 32 and the second connecting portion 34, it is easy to miniaturize the middle portion 36 of the conductive path forming body 30.

[0041] The magnet core 50 is a component formed into a ring shape from magnetic material.

[0042] The magnet core 50 is arranged to surround the central portion 36 of the conductive path forming body 30. This removes noise, particularly high-frequency noise, from the current flowing through the conductive path forming body 30. For example, the inductance formed by the bus terminals 40A, 40B, 40C constituting the conductive path forming body 30 and the magnet core 50 presents a high impedance relative to the high-frequency current flowing through the conductive path forming body 30, thereby removing high-frequency noise.

[0043] The magnet core 50 surrounds the intermediate portion 36 in an insulated manner relative to it. Since the intermediate portion 36 is located within the inner periphery of the magnet core 50, this inner periphery is shaped to allow the intermediate portion 36 to pass through. While maintaining insulation relative to the intermediate portion 36, it is preferable that the inner periphery of the magnet core 50 is shaped to allow access to the outer periphery of the intermediate portion 36. This is because: the distance between the intermediate portion 36 and the magnet core 50 can be reduced, making it easier to increase impedance even with a smaller magnet core 50. Furthermore, by reducing the inner periphery of the magnet core 50, the magnet core 50 can be miniaturized, contributing to the miniaturization and cost reduction of the terminal block 20.

[0044] As described above, the first connecting portion 32 and the second connecting portion 34 are extended to be larger than the intermediate portion 36. Assuming the inner periphery of the magnet core is set to a size that allows the first connecting portion 32 and the second connecting portion 34 to pass through, the gap between the inner periphery of the magnet core and the intermediate portion 36 increases when the magnet core covers the intermediate portion 36. Therefore, the impedance of the magnet core may decrease. If it is desired to compensate for the increased gap by increasing the magnetic circuit cross-sectional area of ​​the magnet core, the magnet core may need to be enlarged. Furthermore, enlarging the magnet core may increase the size of its inner periphery. When the magnet core is enlarged, the terminal block becomes larger, and the cost may also increase.

[0045] Therefore, the inner periphery of the magnet core 50 is reduced to the extent that it restricts the passage of the first connecting portion 32 and the second connecting portion 34. The inner periphery of the magnet core 50 is reduced as much as possible while maintaining insulation relative to the intermediate portion 36. For example, the inner periphery of the magnet core 50 may be reduced to a minimum interval of 1 mm to 10 mm relative to the outer periphery of the intermediate portion 36.

[0046] Furthermore, the magnet core 50 is configured to include multiple segmented cores 50A and 50B. For example, the annular magnet core 50 can be configured into a bi-segmented shape. The magnet core 50 can be bi-segmented into a symmetrical shape or into an asymmetrical shape. The magnet core can also be bi-segmented into three or more parts. In this embodiment, the magnet core 50 forms a racetrack shape with a semi-annular portion connected to the two ends of a pair of parallel portions. The magnet core 50 is bi-segmented into a symmetrical shape along a bi-segmentation plane perpendicular to its long side direction.

[0047] The segmented cores 50A and 50B are each formed of a free magnetic material. For example, the segmented cores 50A and 50B can be formed of ferrite, laminated electromagnetic steel plates, or dust materials.

[0048] Furthermore, with the split cores 50A and 50B arranged so that their end faces face each other and form a ring, the magnet core 50 surrounds the intermediate portion 36. In this case, the first connecting portion 32 and the second connecting portion 34 may not pass through the magnet core 50, so the inner periphery of the magnet core 50 can be made to approximate the shape of the outer periphery of the intermediate portion 36, regardless of the extended shape of the first connecting portion 32 and the second connecting portion 34.

[0049] It should be noted that the magnetic filler 52 can also be positioned between multiple segmented cores 50A and 50B. The magnetic filler 52 is a magnetic material softer than the segmented cores 50A and 50B, filling the gaps created between them. The magnetic filler 52 can be, for example, a magnetic sheet. The magnetic sheet is, for example, a sheet comprising a substrate such as resin or rubber and magnetic powder such as ferrite dispersed within that substrate. The magnetic filler 52 can also be a magnetic adhesive. The magnetic adhesive is an adhesive comprising a substrate such as resin or rubber and magnetic powder such as ferrite dispersed within that substrate. The magnetic filler 52 can also be a filler material combining a magnetic sheet and a magnetic adhesive.

[0050] By using a magnetic filler 52 positioned between the end faces of the multiple segmented cores 50A and 50B, the air gap in the magnetic circuit surrounding the central portion 36 is reduced. For example, if the end faces of the multiple segmented cores 50A and 50B are not parallel, the magnetic filler 52 can fill the gaps between the non-parallel end faces and fit tightly against them. Furthermore, if there are small irregularities on the end faces of the multiple segmented cores 50A and 50B, the magnetic filler 52 can fill these irregularities and fit tightly against them. As a result, the magnetic reluctance in the magnet core 50 is reduced, and the noise reduction effect is improved.

[0051] The insulating base 60 is the portion that holds the conductive path forming body 30 and the magnetic core 50. The insulating base 60 maintains the plurality of bus terminals 40A, 40B, and 40C of the conductive path forming body 30 in a fixed positional relationship in an insulated state. Furthermore, the insulating base 60 maintains the magnetic core 50 in a fixed positional relationship, insulated relative to the plurality of bus terminals 40A, 40B, and 40C, surrounding the bus terminals 40A, 40B, and 40C. The insulating base 60 maintains the magnetic core 50 surrounding the intermediate portion 36 with at least a portion of the first connecting portion 32 and at least a portion of the second connecting portion 34 exposed.

[0052] The insulating base 60 may, for example, be a portion formed by molding resin with one or both of the conductive path forming body 30 and the magnetic core 50 as inserts. Alternatively, the insulating base 60 may also be a portion formed by molding resin separately from the conductive path forming body 30 and the magnetic core 50.

[0053] In this embodiment, the insulating base 60 includes a first resin portion 62 and a second resin portion 66.

[0054] The first resin part 62 is formed by molding the conductive path forming body 30 as an insert from resin. The first resin part 62 holds the plurality of bus terminals 40A, 40B, and 40C in a fixed positional relationship with each other in an insulated state. In addition, the first resin part 62 covers the periphery of the middle part 36, separating the middle part 36 and the magnet core 50 in an insulated manner.

[0055] More specifically, the first resin part 62 includes a fixing plate part 63, a main body part 64, and a retaining protrusion 65.

[0056] The fixing plate portion 63 is formed as a plate that is larger than the mounting hole 11h. A fixing hole 63 is formed in the fixing plate portion 63. The fixing plate portion 63 can cover the outer side of the housing 11 around the mounting hole 11h. In this state, the terminal block 20 is fixed to the housing 11 by screwing a screw through the fixing hole 63h and screwing it into the housing 11.

[0057] The main body 64 protrudes from the fixing plate 63. With the fixing plate 63 installed in the housing 11, the main body 64 is positioned within the mounting hole 11h. The middle portion 36 of the conductive path forming body 30 is located within the main body 64. The conductive path forming body 30 penetrates the fixing plate 63, and the first connecting portion 32 is exposed on the side of the fixing plate 63 opposite to the main body 64. In this embodiment, the first connecting portion 32 includes a plurality of first busbar ends 42A, 42B, and 42C, which are electrically connected to the connecting terminal 14. The connecting terminal 14 is, for example, a plate-shaped busbar terminal extending from the inverter. Alternatively, screw through-holes may be formed in the first busbar ends 42A, 42B, and 42C, and the connecting terminal 14 may be tightened with screws.

[0058] The retaining protrusion 65 protrudes outward from the end of the main body 64 opposite to the fixing plate portion 63. In this embodiment, the retaining protrusion 65 protrudes annularly from the end of the main body 64. The magnet core 50 is disposed between the fixing plate portion 63 and the retaining protrusion 65, surrounding the main body 64. Thus, the magnet core 50 is held in a certain position relative to the main body 64.

[0059] The second resin portion 66 is formed into a retaining body shape that surrounds the outer periphery, upper side, and lower side of the magnet core 50. In this embodiment, the second resin portion 66 is divided into two separate retaining body portions 66A and 66B. A locking protrusion 66Bp is formed on the other side edge of the separate retaining body portion 66A, and a locking tab 66Ap extends from the other side edge of the separate retaining body portion 66B. By closing the open separate retaining body portions 66A and 66B, the magnet core 50 can be disposed within the separate retaining body portions 66A and 66B. With the magnet core 50 covered by the separate retaining body portions 66A and 66B, the locking protrusion 66Bp on the other side edge of the separate retaining body portion 66A engages with the locking hole formed by the locking tab 66Ap on the other side edge of the separate retaining body portion 66B, thereby keeping the separate retaining body portions 66A and 66B in a closed state.

[0060] The conductive path forming body 30 penetrates the main body 64, and the second connecting portion 34 protrudes downward from the main body 64. In this embodiment, the second connecting portion 34 includes a plurality of second busbar ends 44A, 44B, and 44C, which are electrically connected to the connecting terminal 15. The connecting terminal 15 is, for example, a plate-shaped busbar terminal extending from an electrical component within the device 10. Alternatively, screw through holes may be formed in the second busbar ends 44A, 44B, and 44C, and the terminals may be tightened and fixed to the connecting terminal 15 with screws.

[0061] An annular seal 22 may also be disposed on the side of the housing 11 in the fixing plate portion 63. The annular seal 22 is an annular elastic member located around the mounting hole 11h. By having the annular seal 22 in a compressed state between the fixing plate portion 63 and the housing 11, a liquid seal is achieved around the mounting hole 11h.

[0062] The relay connector 24 can also be held in the fixing plate portion 63. The relay connector 24 is a connector that relays the connection between the wiring component 16 inside the device 10 and the wiring component 17 outside the device 10. For example, the relay connector 24 has a structure that can connect to both the connector on the wiring component 16 side and the connector on the wiring component 17 side outside the device 10, and the circuits of the wiring component 16 and the wiring component 17 are electrically connected via relay terminals within the relay connector 24.

[0063] The relay connector 24 can also be molded as an insert in the fixing plate 63. The terminal block 20 is not required to have the relay connector 24.

[0064] <About conductive path forming> The conductive path forming body 30 will be described in more detail. The conductive path forming body 30 includes a plurality of bus terminals 40A, 40B, and 40C. Each of the plurality of bus terminals 40A, 40B, and 40C is a single integral piece of conductive material, preferably a combination of components that are not joined together by an insertion connection. For example, each of the plurality of bus terminals 40A, 40B, and 40C is a stamped component of a single metal piece. If each of the plurality of bus terminals 40A, 40B, and 40C is a stamped component of a single metal piece, then the spring structure and contact structure for insertion connection can be omitted, thus reducing costs. Furthermore, heat generation at the contact points can be suppressed.

[0065] Bus terminals 40A, 40B, and 40C each include first bus end portions 42A, 42B, and 42C, second bus end portions 44A, 44B, and 44C, and bus intermediate portions 46A, 46B, and 46C. The bus intermediate portions 46A, 46B, and 46C are located between the first bus end portions 42A, 42B, and 42C and the second bus end portions 44A, 44B, and 44C. Bus terminals 40A and 40C may also be mirror-symmetrical with respect to a surface passing through the central axis of bus terminal 40B. The first bus end portions 42A, 42B, and 42C and the second bus end portions 44A, 44B, and 44C each extend relative to the bus intermediate portions 46A, 46B, and 46C in a direction intersecting the extending direction A of the bus intermediate portions 46A, 46B, and 46C.

[0066] The aforementioned busbar intermediate portions 46A, 46B, and 46C extend parallel to each other at intervals. In this embodiment, the multiple busbar intermediate portions 46A, 46B, and 46C are arranged in a row at intervals in this order. The interval is set to a size corresponding to the desired insulation distance.

[0067] The first connecting portion 32 is extended in a manner that is larger than the intermediate portion 36, so that at least one of the plurality of first busbar ends 42A, 42B, 42C extends in a direction that intersects with the plurality of busbar intermediate portions 46A, 46B, 46C.

[0068] In addition, the second connecting portion 34 is extended in a manner that is larger than the intermediate portion 36, so that at least one of the plurality of second busbar ends 44A, 44B, 44C extends in a direction that intersects with the plurality of busbar intermediate portions 46A, 46B, 46C.

[0069] Here, the extension of the first connecting portion 32, the second connecting portion 34, and the intermediate portion 36 can also be the extension seen when viewed along the extending direction A of the intermediate portion 36. Furthermore, the extension is the range of extension of each component of the first connecting portion 32, the second connecting portion 34, or the intermediate portion 36. For example, the size of the extension can also be determined by the convex hull (see [reference]) that includes each component of the first connecting portion 32, the second connecting portion 34, or the intermediate portion 36 when viewed along the extending direction A of the intermediate portion 36. Figure 5 Q1, Q2, Figure 6 The evaluation is based on the area of ​​Q1 and Q3.

[0070] The extent of the extensions of the first connecting portion 32, the second connecting portion 34, and the intermediate portion 36 can also be evaluated by the area of ​​the circumscribed circle that includes each component of the first connecting portion 32, the second connecting portion 34, or the intermediate portion 36 when viewed along the extension direction A of the intermediate portion 36.

[0071] In this embodiment, the first connecting portion 32 is a portion that extends at its end relative to the intermediate portion 36, including a portion that protrudes upward from the insulating base 60. The first connecting portion 32 includes first busbar ends 42A, 42B, and 42C.

[0072] The first busbar ends 42A, 42B, and 42C are bent in a direction that intersects with and is orthogonal to the middle busbar portions 46A, 46B, and 46C. The first busbar end 42A is bent towards the side in which the middle busbar portions 46A, 46B, and 46C are arranged. The first busbar end 42C is bent towards the side opposite to the first busbar end 42A. The first busbar end 42B is bent in a direction orthogonal to the direction in which the middle busbar portions 46A, 46B, and 46C are arranged.

[0073] Intermediate portion 36 includes intermediate busbar portions 46A, 46B, and 46C. The convex hull Q1 of intermediate portion 36 is the area surrounded by the outer edges of the outer intermediate busbar portions 46A and 46C in the direction in which the intermediate busbar portions 46A, 46B, and 46C are arranged (see reference). Figure 5 ).

[0074] The convex hull Q2 of the first connecting portion 32 is the area surrounded by a convex polygon formed by the corners of the tops of the ends 42A, 42B, and 42C of the first busbar. The corners of the tops of the ends 42A, 42B, and 42C of the first busbar exist at positions extending outwards from the middle portions 46A, 46B, and 46C of the busbar; therefore, the convex hull Q2 is larger than the convex hull Q1. Consequently, the first connecting portion 32 extends further than the middle portion 36.

[0075] Additionally, the second connecting portion 34 is an extension at the end relative to the intermediate portion 36, including a portion protruding downward from the insulating base 60. The second connecting portion 34 includes second busbar ends 44A, 44B, and 44C.

[0076] The ends 44A and 44C of the second busbar are bent in a direction that intersects with the intermediate busbar portions 46A, 46B, and 46C at a 45-degree angle. End 44A of the second busbar is bent obliquely toward the side in which the intermediate busbar portions 46A, 46B, and 46C are arranged. End 44C of the second busbar is bent toward the side opposite to that of end 44A of the second busbar. End 44B of the second busbar extends straight without bending relative to the intermediate busbar portion 46B.

[0077] The protrusion Q3 of the second connecting portion 34 is the area enclosed by the corners of the top ends of the second busbar ends 44A and 44C and the outer edge of the base portion of the second busbar ends 44A, 44B and 44C extending from the insulating base 60 (see reference). Figure 6The apex angles of the second busbar ends 44A and 44C exist at positions that move outward from the busbar intermediate portions 46A, 46B, and 46C. The base portions of the second busbar ends 44A, 44B, and 44C extending from the insulating base 60 also exist within the same range as the busbar intermediate portions 46A, 46B, and 46C. Therefore, the convex hull Q3 is larger than the convex hull Q1. Consequently, the second connecting portion 34 extends further than the intermediate portion 36.

[0078] In this embodiment, bus terminals 40A, 40B, and 40C are cylindrical bus terminals that include a flat end and a cylindrical middle portion that is closer to a cylinder than the flat end.

[0079] A cylindrical middle section being closer to a cylinder than a flat end means that the cross-sectional shape of the cylindrical middle section (the section orthogonal to the extension direction A) is closer to a circle than the cross-sectional shape of the flat end. The flat end is flatter than the cylindrical middle section. Flatness can be evaluated by the ratio of the shorter side dimension to the longer side dimension in the cross-sectional shape of either the flat end or the cylindrical middle section. The longer side dimension is the dimension along the longest direction of the cross-sectional shape, and the shorter side dimension is the dimension along the direction orthogonal to the longer side. Alternatively, the side with the smaller ratio of the shorter side dimension to the longer side dimension is considered flatter. A flatness closer to 1 can also be considered closer to a circle.

[0080] In this embodiment, the portions of the busbar intermediate sections 46A, 46B, and 46C, excluding those near the ends 42A, 42B, and 42C of the first busbar, and the portions near the base of the ends 44A, 44B, and 44C of the second busbar, are cylindrical intermediate sections with a circular cross-section. Furthermore, the ends 42A, 42B, and 42C of the first busbar are flat, square-plate-shaped ends. Additionally, the portions near the top of the ends 44A, 44B, and 44C of the second busbar are also flat, square-plate-shaped ends.

[0081] On the second busbar ends 44A and 44C of each busbar terminal 40A and 40C, the ends of the cylindrical intermediate portions, i.e., the base ends of the second busbar ends 44A and 44C, are bent to form flat ends that extend in a direction intersecting with the busbar intermediate portions 46A and 46C, including the intermediate portion of the cylindrical intermediate portion. Since the ends of the cylindrical intermediate portions have a circular cross-section, they can easily be bent in various directions relative to the busbar intermediate portions 46A and 46C. Therefore, the second busbar ends 44A and 44C can easily be bent in mutually different directions.

[0082] On the side of the first busbar end 42A, 42B, 42C in busbar terminals 40A, 40B, 40C, the flat end bends in the thickness direction, and the first busbar end 42A, 42B, 42C, which are the top part of the flat end, extends in a direction that intersects with the extension direction of the cylindrical middle part.

[0083] For example, by stamping the cylindrical middle portion in any direction, the flat end relative to the flat direction of the cylindrical middle portion can be machined into any direction. By setting the flat direction of the flat end to the desired bending direction, the bending direction of the flat end can be easily set to any direction.

[0084] The above will be explained in more detail using the manufacturing method of bus terminal 40A as an example.

[0085] First, such as Figure 7 As shown, a cylindrical metal part 90 is prepared. The cylindrical metal part 90 is a round rod-shaped metal material. The cylindrical metal part 90 can also be formed of copper, copper alloy, aluminum, aluminum alloy, etc.

[0086] Furthermore, the ends of the cylindrical metal part 90 are stamped into a flat shape. By arbitrarily setting the stamping direction relative to the middle part of the cylindrical metal part 90, the flattening directions of the two ends of the cylindrical metal part 90 can be arbitrarily different. For example, the flattening directions of the two ends of the cylindrical metal part 90 can be set to be offset by 90 degrees around the central axis of the cylindrical metal part 90.

[0087] like Figure 8 As shown, flat ends 92 and 94 are formed at both ends of the cylindrical metal part 90, and a cylindrical middle part 96 is formed in the middle.

[0088] Furthermore, by bending the base end of the flat end 92 in its thickness direction, the top end of the flat end 92 extends in a direction intersecting with the cylindrical intermediate portion 96. As a result, on the upper side of the busbar intermediate portion 46A, which is connected to the upper end of the cylindrical intermediate portion 96 and the base end of the flat end 92, a first busbar end 42A extending in a direction intersecting with the busbar intermediate portion 46A can be formed.

[0089] The flat end 92 is formed by stamping the cylindrical metal part 90 into a flat shape, so the flattening direction of the flat end 92 can be easily adjusted by adjusting the stamping direction during processing. By forming the flat end 92 flat in the desired bending direction, the first busbar end 42A can be easily processed to extend in any direction. For example, in the busbar terminal 40C, the first busbar end 42C can be easily bent to the side opposite to the first busbar end 42A. Furthermore, for example, in the busbar terminal 40B, by making the flattening direction of the flat end different, the first busbar end 42B can be easily bent in a direction different from the first busbar ends 42A and 42C. A hole for screw tightening and fixing is formed in the first busbar end 42A as needed.

[0090] Furthermore, by bending the end of the cylindrical intermediate portion 96, the flat end portion 94 extends in a direction intersecting the intermediate portion of the cylindrical intermediate portion 96. This forms a second busbar end portion 44A where the flat end portion 94 connects to the lower end of the cylindrical intermediate portion 96. Since the bent portion is located at the end of the cylindrical intermediate portion 96, its bending direction can be arbitrarily set. Therefore, in the busbar terminal 40C, the second busbar end portion 44C can be easily bent to the side opposite to the second busbar end portion 44A. If necessary, a hole for screw tightening and fixing is formed in the second busbar end portion 44A.

[0091] In this way, by bending the cylindrical metal part 90, the end of the cylindrical metal part 90 can be easily positioned off the extension line of the middle part of the cylindrical metal part 90.

[0092] It should be noted that either the process of flattening the end of the cylindrical metal part 90 or the process of bending the cylindrical metal part 90 can be performed.

[0093] like Figure 3 and Figure 4 As shown, if cylindrical bus terminals are used as bus terminals 40A, 40B, and 40C, the bending direction of the first bus end 42A, 42B, 42C and the second bus end 44A, 44B, and 44C can be easily set arbitrarily.

[0094] Therefore, it is easy to align the bent portions of the middle sections 46A, 46B, and 46C of the busbars in the same position in the extension direction A, and it is easy to align the ends 42A, 42B, and 42C of the first busbar in the same position in the same direction, or it is easy to align the ends 44A, 44B, and 44C of the second busbar in the same position.

[0095] For example, focusing on the ends 42A, 42B, and 42C of the first busbar, the bent portions 42V on the sides of the ends 42A, 42B, and 42C of the first busbar are aligned at the same position in the extending direction A of the middle portions 46A, 46B, and 46C of the busbar. Furthermore, the ends 42A, 42B, and 42C of the first busbar are located at the same position in the same direction. It should be noted that the same position of the bent portion 42V and the same position of the ends 42A, 42B, and 42C of the first busbar include cases where they are the same within tolerance ranges, for example, cases where they are the same within ±5mm.

[0096] In this case, any one of the aforementioned first busbar ends 42A, 42B, and 42C can be considered as an example of the first cylindrical busbar terminal, and any other one can be considered as an example of the second cylindrical busbar terminal.

[0097] Additionally, for example, considering the ends 44A, 44B, and 44C of the second busbar. The bent portions 44V on the sides of the ends 44A and 44C of the second busbar are aligned at the same position in the extending direction A of the middle portions 46A, 46B, and 46C of the busbar. The ends 44A and 44C of the second busbar are located at the same position in the same direction. The end 44B of the second busbar is offset relative to the ends 44A and 44C of the second busbar in the aforementioned direction, depending on the position of the terminal 15 connected to it.

[0098] In this case, it can be considered that one of the second busbar ends 44A and 44C is an example of the first cylindrical busbar terminal and the other is an example of the second cylindrical busbar terminal.

[0099] <Method for manufacturing terminal blocks> An example of the manufacturing method of the terminal block 20 described above will be explained.

[0100] like Figure 9 As shown, multiple bus terminals 40A, 40B, and 40C are assembled. This assembly is performed by arranging the bus intermediate portions 46A, 46B, and 46C in a parallel configuration with intervals between them. The assembly of the multiple bus terminals 40A, 40B, and 40C can also be performed, for example, by setting the bus terminals 40A, 40B, and 40C in a mold 98 used for molding the first resin portion 62. A relay connector 24 can also be provided in the mold 98.

[0101] Furthermore, molten resin is supplied into the mold 98 with the busbar intermediate portions 46A, 46B, and 46C of busbar terminals 40A, 40B, and 40C serving as insert portions. Thus, with the busbar intermediate portions 46A, 46B, and 46C disposed inside, the first resin portion 62 is formed by the mold.

[0102] like Figure 10As shown, bus terminals 40A, 40B, 40C and the first resin portion 62 are removed from mold 98. In this state, the first bus terminals 42A, 42B, and 42C protrude from the fixing plate portion 63, and the second bus terminals 44A, 44B, and 44C protrude downwards from the main body portion 64. Between the fixing plate portion 63 and the retaining protrusion 65, the middle portions 46A, 46B, and 46C of the bus terminals are covered by the main body portion 64. A space for arranging the magnet core 50 is formed on the outer periphery of the main body portion 64 and between the fixing plate portion 63 and the retaining protrusion 65.

[0103] like Figure 11 As shown, the dividing cores 50A and 50B move from both outer sides of the main body 64 toward the main body 64. The dividing cores 50A and 50B are arranged in a ring with their end faces facing each other. At this time, a magnetic filler 52 is disposed between the end faces of the dividing cores 50A and 50B.

[0104] Subsequently, the second resin portion 66 is disposed around the magnet core 50 in such a way that it covers the outer periphery of the magnet core 50. Thus, the split cores 50A and 50B remain in a combined state. Furthermore, the magnet core 50 is protected and insulated from its surroundings.

[0105] <Effects, etc.> According to the terminal block 20 configured as described above, the magnet core 50 includes a plurality of segmented cores 50A and 50B. Therefore, by assembling the plurality of segmented cores 50A and 50B around the intermediate portion 36, which is smaller than the extensions of the first connecting portion 32 and the second connecting portion 34, it is possible to form a configuration where the intermediate portion 36 is surrounded by the magnet core 50. By surrounding the intermediate portion 36 of the conductive path forming body 30 with the annular magnet core 50, noise can be reduced. Furthermore, the first connecting portion 32 or the second connecting portion 34 may not be inserted into the annular magnet core 50, thus reducing the inner periphery of the magnet core 50. This allows for miniaturization of the magnet core 50. Additionally, reducing the distance between the magnet core 50 and the intermediate portion 36 improves the noise reduction effect.

[0106] By forming the inner periphery of the magnet core 50 into a shape that restricts the passage of the first connecting portion 32 and the second connecting portion 34 while allowing the passage of the intermediate portion 36, the magnet core 50 can easily access the intermediate portion 36. This enables miniaturization of the magnet core 50 and improves noise reduction.

[0107] Furthermore, by forming the bus terminals 40A, 40B, and 40C into stamped parts that are single metal pieces, they can be easily processed compared to forming the bus terminals into a combination of multiple parts.

[0108] Furthermore, the conductive path forming body 30 includes a plurality of bus terminals 40A, 40B, and 40C, and a plurality of bus intermediate portions 46A, 46B, and 46C extending parallel to each other at intervals. At least one of the plurality of first bus ends 42A, 42B, and 42C extends in a direction intersecting the plurality of bus intermediate portions 46A, 46B, and 46C, with the first connecting portion 32 extending further than the intermediate portion 36. At least one of the plurality of second bus ends 44A, 44B, and 44C extends in a direction intersecting the plurality of bus intermediate portions 46A, 46B, and 46C, with the second connecting portion 34 extending further than the intermediate portion 36. Therefore, depending on the arrangement of the connecting terminals 14 and 15, the first bus ends 42A, 42B, and 42C and the second bus ends 44A, 44B, and 44C can be appropriately bent relative to the bus intermediate portions 46A, 46B, and 46C. In this case, the first connecting portion 32 and the second connecting portion 34 are sometimes extended to be larger than the intermediate portion 36. In such a case, the small inner circumferential magnet core 50 can be arranged around the intermediate portion 36.

[0109] Furthermore, bus terminals 40A and 40C are cylindrical bus terminals, with the lower end of the cylindrical intermediate portion 96 bent and the flat end 94 extending in a direction intersecting the extending direction A of the intermediate portion of the cylindrical intermediate portion 96. Compared to the case where it is a long, thin plate, the cylindrical intermediate portion 96 is easier to bend in any direction. Therefore, it is easy to process the flat end 94 to extend in any direction.

[0110] Furthermore, bus terminals 40A, 40B, and 40C are cylindrical bus terminals, with the flat end 92 bent in its thickness direction, and the top end of the flat end 92 extending in a direction intersecting the extending direction A of the cylindrical intermediate portion 96. Therefore, by processing the flat end 92 in any direction relative to the cylindrical intermediate portion 96, it is easy to process the flat end 92 to extend in any direction.

[0111] Furthermore, bus terminals 40A, 40B, and 40C are cylindrical bus terminals, with the ends of the cylindrical middle portions bent to form bent portions 44V, or the flat ends bent to form bent portions 42V. Therefore, compared to cases where the bus terminals are bent at different positions at each end, it is less likely to compress the installation space of the magnet core 50. In other words, it is easier to set a larger length for the straight-extending bus middle portions 46A, 46B, and 46C. As a result, the magnet core 50 can be increased in the extending direction A of the multiple cylindrical middle portions 96, i.e., the middle portions 36. If the height of the magnet core 50 can be increased, the outer peripheral shape of the magnet core 50 can be miniaturized.

[0112] In addition, if the magnetic filler 52 is located between multiple segmented cores 50A and 50B, the noise reduction performance can be improved.

[0113] Furthermore, according to the manufacturing method of the bus terminal 40A described above, a cylindrical metal part 90 is prepared, and the ends of the cylindrical metal part 90 are stamped into a flat shape to form flat ends 92 and 94. The cylindrical metal part 90 is then bent, and the ends of the cylindrical metal part 90 are positioned offset from the extension line of the middle portion of the cylindrical metal part. By stamping the ends of the cylindrical metal part 90 into a flat shape, it is easy to make the flat ends contact the surfaces of the connecting terminals 14 and 15 for connection. By bending the cylindrical portion of the cylindrical metal part 90 in any direction, or arbitrarily setting the flat direction relative to the cylindrical portion, it is easy to set the flat portion of the ends of the cylindrical metal part in any direction relative to the extension direction of the middle portion. Therefore, while setting the extension of the middle portion 36 to be smaller than the extension of the first connecting portion 32 and the second connecting portion 34, it is easy to ensure a larger space for the magnet core 50 between the first connecting portion 32 and the second connecting portion 34.

[0114] In the above embodiment 1, an example was described where the terminal block 20 has three bus terminals 40A, 40B, and 40C. The number of bus terminals provided by the terminal block is arbitrary.

[0115] Figure 12 and Figure 13 The terminal block 120 shown in the modified example has two bus terminals 40A and 40C. That is, the terminal block 120 is configured to omit the middle bus terminal 40B in the aforementioned terminal block 20, thus miniaturizing it in the width direction. In addition, the relay connector 24 is also omitted in the terminal block 120.

[0116] In this modified example, the first busbar ends 42A and 42C of the two busbar terminals 40A and 40C are also bent relative to the busbar intermediate portions 46A and 46C. Therefore, the first connecting portion 132 of the conductive path forming body 130 having the two busbar terminals 40A and 40C is more extended than the intermediate portion 136. Furthermore, the second busbar ends 44A and 44C of the two busbar terminals 40A and 40C are bent relative to the busbar intermediate portions 46A and 46C. Therefore, the second connecting portion 134 of the conductive path forming body 130 is more extended than the intermediate portion 136.

[0117] Similar to Embodiment 1, by setting the magnet core 50 as a segmented structure, noise reduction and miniaturization of the magnet core can be achieved.

[0118] The terminal block may also have only one bus terminal. For example, it may only have bus terminal 40A. Even in this case, the first connecting portion including the first bus end 42A and the second connecting portion including the second bus end 44A can each be formed into a shape that is more extended than the middle portion including the bus middle portion 46A. By using a segmented magnet core, noise reduction and miniaturization of the magnet core can be achieved.

[0119] (Implementation Method 2) The terminal block 220 of Embodiment 2 will be described. Figure 14 This is a perspective view showing the terminal block 220 of embodiment 2. Figure 15 This is a perspective view showing the bus terminals 240A, 240B, 240C and the magnet core 250 of the terminal block. Figure 16 yes Figure 15 XVI-XVI line sectional view, Figure 17 yes Figure 15 A cross-sectional view along line XVII-XVII. It should be noted that in this embodiment 2, the description focuses on the differences from embodiment 1.

[0120] Terminal block 220 includes conductive path forming body 230, magnet core 250 and insulating base 260.

[0121] The conductive path forming body 230 includes multiple bus terminals 240A, 240B, and 240C. The main difference between terminal block 220 and terminal block 20 is the structure of the bus terminals 240A, 240B, and 240C.

[0122] That is, the bus terminals 40A, 40B, and 40C of Embodiment 1 are formed by machining cylindrical metal parts, but the bus terminals 240A, 240B, and 240C of Embodiment 2 are formed by bending slender metal sheets. The metal sheets are formed, for example, from copper, copper alloys, aluminum, or aluminum alloys.

[0123] Slender metal plates are more easily bent in their thickness direction than in their width direction. Therefore, by configuring them as follows, the first connecting portion 232 and the second connecting portion 234 of the conductive path forming body 230 are extended further than the middle portion 236.

[0124] That is, the intermediate busbar portions 246A, 246B, and 246C of busbar terminals 240A, 240B, and 240C are arranged in a parallel state with intervals between them. The intermediate busbar portions 246A, 246B, and 246C are arranged overlappingly in the same area in the thickness direction.

[0125] That is, the first busbar ends 242A, 242B, and 242C at the upper ends of busbar terminals 240A, 240B, and 240C are bent, for example, vertically in the thickness direction. The base ends of the first busbar ends 242A, 242B, and 242C are arranged in a parallel state with vertical spacing. The end of the first busbar end 242A is pre-formed into an L-shape and positioned away from the side of the first busbar end 242B. The end of the first busbar end 242C is pre-formed into an L-shape on the opposite side and positioned away from the other side of the first busbar end 242B.

[0126] Since the ends of the first busbar ends 242A, 242B, and 242C are aligned at the same position in the extension direction A of the busbar middle portions 246A, 246B, and 246C, stepped portions are provided at the ends of the first busbar ends 242B and 242C.

[0127] Therefore, compared with the convex hull R1 surrounding the middle portions 246A, 246B, and 246C of the busbars, the convex hull R2 surrounding the ends 242A, 242B, and 242C of the first busbar becomes larger (see reference). Figure 17 ).

[0128] Furthermore, the lower ends of the busbar terminals 240A, 240B, and 240C, the second busbar ends 244A, 244B, and 244C, are bent, for example, vertically in the thickness direction. The base ends of the second busbar ends 244A, 244B, and 244C are arranged in a parallel state with vertical spacing. The second busbar ends 244A and 244C are pre-formed to extend outward to both sides of the second busbar end 244B. The portion extending from the side edge of this extension is bent and extends along the extension direction A of the busbar intermediate portions 246A and 246C. In addition, the top end of the second busbar end 244B is bent and extends along the extension direction A of the busbar intermediate portion 246B. Thus, the ends of the second busbar 244A, 244B, and 244C extend in a parallel manner at intervals along the extension direction A of the middle part of the busbar 246A, 246B, and 246C.

[0129] Therefore, compared with the convex hull R1 surrounding the middle portions 246A, 246B, and 246C of the second busbar, the convex hull R3 surrounding the ends 244A, 244B, and 244C of the second busbar becomes larger (see reference). Figure 16 ).

[0130] The insulating base 260 holds the base ends of the busbar middle sections 246A, 246B, 246C, the first busbar ends 242A, 242B, 242C, and the second busbar ends 244A, 244B, 244C in a certain position in a mutually insulated state.

[0131] Furthermore, the magnet core 250, like in Embodiment 1, has segmented cores 250A and 250B surrounding the middle portions 246A, 246B, and 246C of the busbar. The insulating base 260 also maintains the state in which the segmented cores 250A and 250B surround the middle portions 246A, 246B, and 246C of the busbar.

[0132] According to the terminal block 220 of this embodiment 2, the magnet core 250 includes a plurality of segmented cores 250A and 250B. Therefore, similar to embodiment 1, by combining the plurality of segmented cores 250A and 250B, it is possible to form a state in which the magnet core 250 surrounds the middle portion 236, thereby reducing noise. In addition, the first connecting portion 232 or the second connecting portion 234 may not be inserted through the annular magnet core 250, thus reducing the size of the inner periphery of the magnet core 250. As a result, the magnet core 250 can be miniaturized.

[0133] In addition to the effects of the cylindrical busbar terminals, the same effects as in Embodiment 1 can be achieved.

[0134] It should be noted that the structures described in the above embodiments and variations can be appropriately combined as long as they do not contradict each other.

[0135] For example, cylindrical busbar terminals and plate busbar terminals can be used together in the same terminal block. Explanation of reference numerals in the attached figures

[0136] 10 Equipment 11. Enclosure 11h mounting hole Connect the other terminal to 14 and 15. 16, 17 Wiring components 20, 120, 220 terminal blocks 22 Annular seal 24 Relay Connectors 30, 130, 230 Conductive path formations 32, 132, 232 First connecting part 34, 134, 234 Second connecting part 36, 136, 236 (middle section) 40A, 40B, 40C, 240A, 240B, 240C bus terminals 42A, 42B, 42C, 242A, 242B, 242C, End of Busbar 1 42V Bending Section 44A, 44B, 44C, 244A, 244B, 244C End of the 2nd busbar 44V bending section 46A, 46B, 46C, 246A, 246B, 246C Busbar Intermediate Section 50 and 250 magnet cores 50A, 50B, 250A, 250B split cores 52 Magnetic filler 60, 260 Insulating Base 62 Resin Section 1 63 Fixed plate section 63h Fixing Hole 64 Main body 65. Maintain the protrusion. 66. Resin Section 2 66A, 66B segmented body parts 66Ap locking clip 66Bp locking protrusion 67a Thin-walled hinge 90 Cylindrical metal parts 92, 94 Flat ends 96. Cylindrical middle section 98 molds Convex hull of Q1, Q2, Q3, R1, R2, R3

Claims

1. A terminal block comprising: a conductive path forming body including a bus bar terminal; a ring-shaped magnet core; and an insulating base that holds the conductive path forming body and the magnet core, the conductive path forming body including a first connecting portion, a second connecting portion, and an intermediate portion between the first connecting portion and the second connecting portion, the first connecting portion and the second connecting portion being larger than the intermediate portion when viewed in an extension direction of the intermediate portion, the magnet core including a plurality of divided cores, the magnet core surrounding the intermediate portion in a state in which the plurality of divided cores are arranged in a ring shape, the insulating base holding the magnet core that surrounds the intermediate portion in a state in which at least a portion of the first connecting portion and at least a portion of the second connecting portion are exposed.

2. The terminal block according to claim 1, wherein an inner peripheral portion of the magnet core is formed in a shape that allows the intermediate portion to pass therethrough and restricts the first connecting portion and the second connecting portion from passing therethrough.

3. The terminal block according to claim 1 or claim 2, wherein the bus bar terminal is a press-processed member of a single metal piece.

4. The terminal block according to claim 1 or claim 2, wherein the conductive path forming body includes a plurality of the bus bar terminals, each of the plurality of bus bar terminals including a first bus bar end portion, a second bus bar end portion, and a bus bar intermediate portion between the first bus bar end portion and the second bus bar end portion, the plurality of bus bar intermediate portions extending in a state in which the plurality of bus bar intermediate portions are spaced apart from each other in parallel, at least one of the plurality of first bus bar end portions extending in a direction that intersects the plurality of bus bar intermediate portions in a manner in which the first connecting portion is larger than the intermediate portion, at least one of the plurality of second bus bar end portions extending in a direction that intersects the plurality of bus bar intermediate portions in a manner in which the second connecting portion is larger than the intermediate portion.

5. The terminal block according to claim 1 or claim 2, wherein the conductive path forming body includes a cylindrical bus bar terminal as the bus bar terminal, the cylindrical bus bar terminal including a flat end portion and a cylindrical intermediate portion that is closer to a cylinder than the flat end portion, an end portion of the cylindrical intermediate portion being bent, the flat end portion extending in a direction that intersects an extension direction of the intermediate portion in the cylindrical intermediate portion.

6. The terminal block according to claim 1 or claim 2, wherein the conductive path forming body includes a cylindrical bus bar terminal as the bus bar terminal, the cylindrical bus bar terminal including a flat end portion and a cylindrical intermediate portion that is closer to a cylinder than the flat end portion, the flat end portion being bent in a thickness direction thereof, a top end portion of the flat end portion extending in a direction that intersects an extension direction of the cylindrical intermediate portion.

7. The terminal block according to claim 1 or claim 2, wherein the conductive path forming body includes a first cylindrical bus bar terminal and a second cylindrical bus bar terminal as the bus bar terminal, ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The first and second cylindrical bus bar terminals each include a flat end portion and a cylindrical intermediate portion closer to a cylinder than the flat end portion, The cylindrical intermediate portions of the first and second cylindrical bus bar terminals each extend in a side-by-side state with a space therebetween, End portions of the cylindrical intermediate portions or the flat end portions of the first and second cylindrical bus bar terminals are bent at the same position in the direction of extension of the plurality of cylindrical intermediate portions.

8. The terminal block according to claim 1 or claim 2, wherein The magnet core includes a magnetic filler interposed between the plurality of divided cores.

9. A manufacturing method of a bus bar terminal, A cylindrical metal piece is prepared, An end portion of the cylindrical metal piece is press worked into a flat shape, The cylindrical metal piece is bent, and the end portion of the cylindrical metal piece is disposed at a position deviated from an extension line of an intermediate portion of the cylindrical metal piece.

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