Ferrite core built-in connector

Abstract

The invention discloses a connector with a built-in ferrite core, which suppresses damage of the ferrite core and is excellent in selection freedom of resin materials used. A ferrite core built-in connector (10) is provided with: a plurality of terminal fittings (12) in which a first connection section (22) and a second connection section (24) are connected by a band-plate-shaped intermediate section (26); a ferrite core (14) disposed so as to surround the periphery of the intermediate section (26) of the plurality of terminal fittings (12); and a connector housing (16) in which the ferrite core (14) and the portions of the plurality of terminal fittings (12) excluding the first connection section (22) and the second connection section (24) are housed in an embedded state, and the intermediate sections (26) of the plurality of terminal fittings (12) are disposed in a state in which the intermediate sections (26) are spaced apart from each other by a gap (31) in the plate thickness direction and overlap each other in projections in the plate thickness direction.

Description

Technical Field

[0001] The invention relates to a ferrite core built-in connector. Background Art

[0002] In the past, in order to suppress noise in power transmission between vehicle-mounted devices that switch from an AC circuit to a DC circuit, such as between a motor and an inverter, a ferrite core built-in connector in which a ferrite core is arranged around a terminal part is used, as disclosed in Patent Document 1. However, if the ferrite core is embedded in a synthetic resin connector housing together with the terminal part by insert molding to form a connector, the ferrite core may be damaged due to the influence of the shrinkage force when the resin is cured. Therefore, in the joint connector disclosed in Patent Document 2, the following countermeasure is proposed: the terminal part is assembled into a structure of a core molded body pre-surrounded by a protective part to form a connector housing as an embedded part, and the protective part is composed of a resin material softer than the connector housing. According to this, because the ferrite core is surrounded by the protective part composed of a resin material softer than the connector housing, the shrinkage force of the connector housing during the molding of the connector housing is absorbed by the protective part, and damage to the ferrite core can be suppressed. Prior art literature Patent Literature

[0003] Patent Document 1: Japanese Patent Application Publication No. 2009-295340 Patent Document 2: Japanese Patent Application Publication No. 2015-53202 Summary of the invention Problems to be solved by the invention

[0004] However, the countermeasure of Patent Document 2 requires that the protection portion be formed of a resin material softer than the connector housing. Therefore, for example, when high heat resistance is required, the resin material used for the protection portion may not meet the heat resistance requirement.

[0005] Therefore, a ferrite core built-in connector is disclosed, which suppresses damage to the ferrite core and has excellent freedom in selecting a resin material to be used. Solutions to Solve Problems

[0006] The ferrite core built-in connector of the present invention comprises: a plurality of terminal parts formed by connecting the first connecting part and the second connecting part by a plate-shaped middle part; a ferrite core configured to surround the middle parts of the plurality of terminal parts; and a connector housing that accommodates the portions of the plurality of terminal parts other than the first connecting part and the second connecting part and the ferrite core in a buried state, and the middle parts of the plurality of terminal parts are configured to be spaced apart from each other in a plate thickness direction and overlap each other in a projection in the plate thickness direction. Effects of the Invention

[0007] According to the present invention, it is possible to provide a ferrite core built-in connector which suppresses damage to the ferrite core and has excellent freedom in selecting a resin material to be used. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a perspective view showing the connector housing of the connector with built-in ferrite core according to the first embodiment in a see-through state. Figure 2 yes Figure 1 Front view of the ferrite core built-in connector shown. Figure 3 yes Figure 1 The cross-sectional view of the ferrite core built-in connector shown is equivalent to Figure 4 Figure 3 is a diagram of the III-III section. Figure 4 yes Figure 2 IV-IV section view in FIG. Figure 5 yes Figure 4 VV section view in. Figure 6 It shows the composition Figure 1 An exploded perspective view of the terminal parts of the ferrite core built-in connector shown. Figure 7 This is a perspective view showing a ferrite core built-in connector according to the second embodiment. Figure 8 This is a perspective view showing a ferrite core built-in connector according to a third embodiment. Fig. 9 is a longitudinal sectional view of the ferrite core built-in connector of embodiment 4, which is equivalent to Figure 3 . DETAILED DESCRIPTION

[0009] <Description of Embodiments of the Invention> First, embodiments of the present invention will be described by way of examples. The ferrite core built-in connector of the present invention, (1) It comprises: a plurality of terminal parts in which a first connection part and a second connection part are connected by a plate-shaped middle part; a ferrite core arranged to surround the middle parts of the plurality of terminal parts; and a connector housing which houses the portions of the plurality of terminal parts other than the first connection part and the second connection part and the ferrite core in an embedded state, wherein the middle parts of the plurality of terminal parts are arranged in a state where they are spaced apart from each other in a plate thickness direction and overlap with each other in a projection in the plate thickness direction.

[0010] According to the ferrite core built-in connector of the present invention, the middle parts of the plurality of terminal parts in the form of a strip are arranged in a state where they are spaced apart from each other in the plate thickness direction and overlap each other in the projection in the plate thickness direction. Furthermore, the ferrite core for noise removal is arranged to surround the middle parts of the terminal parts arranged in an overlapping manner with a gap in the plate thickness direction. Thus, compared with the case where the middle parts arranged in parallel with a gap in the plate width direction are surrounded by the ferrite core, the circumference of the ferrite core surrounding the plurality of middle parts stacked in the plate thickness direction can be shortened, and the ferrite core can be miniaturized. As a result, when the connector housing is injection molded in a manner such that the middle parts of the terminal parts and the ferrite core are buried in the connector housing, the amount of resin arranged around the ferrite core can be reduced. Thus, the shrinkage force of the resin applied to the ferrite core when the resin is cured can be reduced, and damage to the ferrite core during the molding of the connector housing can be suppressed. Therefore, it is not necessary to adopt the structure described in Patent Document 2 in which the ferrite core is surrounded by a resin material softer than the connector housing. When heat resistance is required, the risk of damage to the ferrite core can be reduced and the freedom of choice of resin material for the connector housing can be increased by using a relatively hard resin material with excellent heat resistance (for example, a material with high heat resistance such as PBT (polybutylene terephthalate)).

[0011] Furthermore, by shortening the circumference (magnetic path length) of the ferrite core, the magnetic path cross-sectional area of ​​the ferrite core can be reduced while maintaining the impedance performance (noise suppression performance) of the ferrite core. As a result, the ferrite core can be further miniaturized, and the contraction force of the connector housing acting on the ferrite core during solidification is reduced, which can more effectively prevent damage to the ferrite core.

[0012] (2) In (1), preferably, at least one of the plurality of terminal parts has a connecting portion extending from an end portion on the first connecting portion side of the middle portion toward the plate width direction of the middle portion, and the first connecting portion connected to the middle portion via the connecting portion is arranged at a position deviating from an extension line of the connecting portion in the plate width direction, and the first connecting portions of the plurality of terminal parts overlapping in the plate thickness direction at the middle portion are arranged side by side in the plate width direction with gaps therebetween via the connecting portion.

[0013] That is, depending on the constraints based on the shape of the other terminal, it is sometimes required to arrange the first connecting portions of multiple terminal parts in parallel with gaps in the board width direction. Even in such a case, by providing a connecting portion extending from the middle portion in the board width direction between the middle portion and the first connecting portion, the first connecting portion is arranged at a position deviating from the extension line of the middle portion in the board width direction, so that the middle portions of multiple terminal parts can overlap with each other in the board thickness direction. Therefore, even in a structure in which the first connecting portions of multiple terminal parts are arranged in parallel in the board width direction, the effect of reducing the amount of resin in the connector housing due to the miniaturization of the ferrite core of the present invention or the effect of maintaining impedance performance due to the short magnetic path length can be enjoyed.

[0014] (3) In (1) or (2), preferably, at least one of the terminal parts having the connecting portion has a step-shaped portion bent into a crank shape in the plate thickness direction, the middle portion and the first connecting portion provided on both sides of the step-shaped portion are arranged at height positions staggered from each other in the plate thickness direction, and the first connecting portions of the plurality of terminal parts overlapping in the plate thickness direction at the middle portion are arranged at the same height position in the plate thickness direction via the step-shaped portion.

[0015] That is, depending on the constraints based on the shape of the other terminal, it is sometimes required that the first connecting portions of the plurality of terminal parts are not only arranged side by side with gaps between them in the board width direction, but also arranged at the same height position in the board thickness direction. Even in such a case, by providing a step-shaped portion at the connecting portion of the terminal part, the middle portion and the first connecting portion are arranged at different height positions, so that the middle portions of the plurality of terminal parts can overlap each other in the board thickness direction. Thus, even in a structure in which the first connecting portions of the plurality of terminal parts are arranged side by side in the board width direction at the same height position in the board thickness direction, the effect of reducing the amount of resin of the connector housing brought about by the miniaturization of the ferrite core of the present invention or the effect of maintaining impedance performance brought about by the short magnetic path length can be enjoyed.

[0016] (4) In any one of (1) to (3), it is preferred that the connector housing is made of a resin material having a higher heat resistance than PVC. The ferrite core surrounded by the plurality of intermediate portions stacked in the plate thickness direction can be miniaturized, and the amount of resin disposed around the ferrite core is reduced. Therefore, even if the connector housing is provided with a resin material having a higher heat resistance than PVC (polyvinyl chloride), damage to the ferrite core can be suppressed. Therefore, it is not necessary to surround the ferrite core with a resin material (PVC, etc.) that is softer than the connector housing as in Patent Document 2, and the connector housing can be formed with a resin material having a higher heat resistance than PVC. As a result, the requirement for heat resistance of the connector can be advantageously met. The resin material having a higher heat resistance than PVC preferably includes a thermoplastic resin such as PBT, PPS (polyphenylene sulfide), PTFE (polytetrafluoroethylene), PAI (polyamide-imide), or a thermosetting resin such as PI (polyimide resin).

[0017] (5) In any one of (1) to (4), preferably, the connector housing has a terminal retaining portion and a core retaining portion, the terminal retaining portion retains portions of the plurality of terminal parts other than the first connecting portion and the second connecting portion in an embedded state, and the core retaining portion is integrally formed with the terminal retaining portion to retain the ferrite core in an embedded state.

[0018] By integrally molding the terminal holding portion and the core holding portion, the connector housing can be formed as a molded product at one time, and multiple injection moldings are not required, which can simplify the manufacturing process and achieve short-term manufacturing. In particular, since the ferrite core is less likely to be damaged by the stress applied during the shrinkage after the resin is molded, the ferrite core can be prevented from being damaged even if the core holding portion is integrally molded with the same hard resin as the terminal holding portion.

[0019] (6) In any one of (1) to (4), preferably, the connector housing has a first resin portion and a second resin portion, the first resin portion holds the plurality of terminal parts other than the first connecting portion and the second connecting portion in an embedded state, and the second resin portion is formed separately from the first resin portion to hold the first resin portion and the ferrite core in an embedded state.

[0020] The connector housing is formed by dividing into a first resin part and a second resin part, the first resin part holds a plurality of terminal parts in an embedded state, and the second resin part holds the first resin part and the ferrite core in an embedded state. Therefore, after the first resin part holding the terminal parts in an embedded state is formed into a primary molded product, the ferrite core built-in connector can be formed into a secondary molded product by injection molding the primary molded product and the ferrite core as an embedded product. As a result, the amount of resin in the secondary molded product containing the ferrite core as an embedded product can be reduced by the amount of the first resin part, so that the contraction force applied to the ferrite core when the resin material of the second resin part is cured can be further reduced, and damage to the ferrite core can be further advantageously prevented or suppressed.

[0021] (7) In any one of (1) to (6), the connector housing preferably includes an exposure hole for exposing the ferrite core. This is because the exposure hole reduces the amount of resin in the connector housing, which can further prevent or suppress damage to the ferrite core caused by the contraction force of the resin material of the connector housing when it is cured.

[0022] (8) In any one of (1) to (7), it is preferred that the first connection portion and the second connection portion of each of the terminal parts protrude and are exposed from the connector housing on both sides of the axial direction of the cylindrical ferrite core. Thus, for example, the first connection portion can be configured to be connectable to a mating connector, and the second connection portion can be connected to an internal circuit of an onboard device or the like or to a wire terminal extending from the onboard device.

[0023] <Details of Embodiments of the Invention> Specific examples of the ferrite core built-in connector of the present invention are described below with reference to the drawings. The present invention is not limited to these examples, but is shown by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0024] <Implementation Method 1> Below, use Figures 1 to 6 The ferrite core built-in connector 10 according to the first embodiment of the present invention is described. The ferrite core built-in connector 10 is, for example, a connector for connecting an electric motor and a PCU (power control unit), one end of a terminal part 12 in the ferrite core built-in connector 10 is electrically connected to the electric motor (not shown), and the other end of the terminal part 12 is electrically connected to the PCU (not shown). In addition, the ferrite core built-in connector 10 can be arranged in any orientation, but in the following, it is assumed that the upper side is Figure 1 The top of the middle and the bottom of the middle Figure 1 Below, in front Figure 4 The left side of the middle, the back side is Figure 4 The right side of the Figure 2The left side of Figure 2 In addition, with respect to a plurality of identical components, sometimes only some of the components are denoted by reference numerals, and reference numerals are omitted for the other components.

[0025] <Ferrite core built-in connector 10> The ferrite core built-in connector 10 includes a terminal part 12, a ferrite core 14 arranged to surround the terminal part 12, and a connector housing 16 that accommodates the terminal part 12 and the ferrite core 14. Figure 1 , the connector housing 16 is shown in a state where the internal components can be seen through.

[0026] <Terminal Parts 12> In the first embodiment, a plurality of terminal parts 12 are provided, including three, namely, the first terminal part 12a, the second terminal part 12b, and the third terminal part 12c. Each terminal part 12 (the first to third terminal parts 12a to 12c) is respectively formed of a bus bar, for example, formed of a conductive metal such as copper or copper alloy, aluminum or aluminum alloy. The first to third terminal parts 12a to 12c are in the shape of a strip extending in the front-to-back direction as a whole, with the up-down direction being the plate thickness direction and the left-right direction being the plate width direction. The plate thickness dimension of the first to third terminal parts 12a to 12c in the shape of a strip is smaller than the plate width dimension. The first to third terminal parts 12a to 12c have a substantially constant lengthwise dimension (front-to-back dimension) as a whole, and the front ends and rear ends of the first to third terminal parts 12a to 12c are arranged in the left-to-right direction and are located at the same position in the front-to-back direction. The first to third terminal fittings 12a to 12c have substantially the same widthwise dimensions (left-right dimension) at locations other than portions where connecting portions 28a and 28c described later are formed.

[0027] A substantially circular front through hole 18 is formed at the front end of each of the first to third terminal parts 12a to 12c, which penetrates each in the plate thickness direction (up and down direction). In addition, a substantially circular rear through hole 20 is formed at the rear end of each of the first to third terminal parts 12a to 12c, which penetrates each in the plate thickness direction (up and down direction). Thus, a first connection portion 22 (respectively, first connection portions 22a to 22c) is formed at the front end of one end of the first to third terminal parts 12a to 12c, and the first connection portions 22a to 22c are electrically connected to the motor (not shown). In addition, a second connection portion 24 (respectively, second connection portions 24a to 24c) is formed at the rear end of the other end of each of the first to third terminal parts 12a to 12c, and the second connection portions 24a to 24c are electrically connected to the PCU (not shown). Furthermore, in the first to third terminal parts 12a to 12c, the middle part of each first connection part 22 and each second connection part 24 in the front-to-back direction is formed as an intermediate part 26 (intermediate parts 26a to 26c, respectively). In this way, each terminal part 12 has a structure in which the first connection part 22 and the second connection part 24 are connected by the intermediate part 26. Each terminal part 12 is in the shape of a strip extending in the front-to-back direction, in which the plate thickness dimension is smaller than the plate width dimension at least in the intermediate part 26. In the first embodiment, the plate width dimension of the intermediate part 26 is smaller than the plate width dimensions of the first and second connection parts 22 and 24, and the magnetic path length of the ferrite core 14 arranged around the intermediate part 26 can be set shorter. The plate width dimension of the intermediate part 26 can be the same as that of the first and second connection parts 22 and 24, or it can be larger than that of the first and second connection parts 22 and 24.

[0028] On the front and rear sides of the middle part 26a of the first terminal part 12a, connecting parts 28a protruding to the left from the front and rear ends of the middle part 26a are respectively provided. In addition, the first connecting part 22a extends forward from the left end of the connecting part 28a on the front side, and the second connecting part 24a extends backward from the left end of the connecting part 28a on the rear side. Thus, the first connecting part 22a is arranged at a position deviated to the left relative to the extension line of the middle part 26a to the front, and the second connecting part 24a is arranged at a position deviated to the left relative to the extension line of the middle part 26a to the rear.

[0029] like Figure 5 , 6As shown, each connection portion 28a is provided with a step-shaped portion 30a that is bent into a crank shape and extends in the plate thickness direction. The step-shaped portion 30a is provided at the end portion on the side of the middle portion 26a of the connection portion 28a, and protrudes downward from the connection end with the middle portion 26a of the connection portion 28a. Therefore, the first connection portion 22a and the middle portion 26a arranged on both sides of the front step-shaped portion 30a are arranged at mutually staggered height positions in the plate thickness direction (up and down direction), and the first connection portion 22a is located below the middle portion 26a through the step-shaped portion 30a. Similarly, the second connection portion 24a and the middle portion 26a arranged on both sides of the rear step-shaped portion 30a are arranged at mutually different height positions in the plate thickness direction (up and down direction), and the second connection portion 24a is located below the middle portion 26a through the step-shaped portion 30a.

[0030] In addition, the protruding lengths of the front and rear connecting parts 28a, 28a from the middle part 26a to the left are substantially the same. In addition, the protruding lengths of the front and rear step-shaped parts 30a, 30a from the middle part 26a to the bottom are substantially the same. Therefore, the first connecting part 22a and the second connecting part 24a are arranged at substantially the same positions in the up-down direction and the left-right direction, and are located on the front and rear sides.

[0031] In addition, the third terminal part 12c is provided with a connecting portion 28c protruding to the right from the front and rear ends of the middle portion 26c. Furthermore, the first connecting portion 22c extends forward from the left end of the connecting portion 28c on the front side, and the second connecting portion 24c extends backward from the left end of the connecting portion 28c on the rear side. Thus, the first connecting portion 22c is arranged at a position deviated to the left relative to the extension line of the middle portion 26c to the front, and the second connecting portion 24c is arranged at a position deviated to the left relative to the extension line of the middle portion 26c to the rear.

[0032] like Figure 5 , 6 As shown, each connecting portion 28c is provided with a step-shaped portion 30c that is bent into a crank shape and extends in the plate thickness direction. The step-shaped portion 30c is provided at the end of the connecting portion 28c on the side of the middle portion 26c, and protrudes upward from the connection end with the middle portion 26c. Therefore, the first connecting portion 22c and the middle portion 26c arranged on both sides of the front step-shaped portion 30c are arranged at different height positions in the plate thickness direction (up and down direction), and the first connecting portion 22c is located above the middle portion 26c through the step-shaped portion 30c. Similarly, the second connecting portion 24c and the middle portion 26c arranged on both sides of the rear step-shaped portion 30c are arranged at different height positions in the plate thickness direction (up and down direction), and the second connecting portion 24c is located above the middle portion 26c through the step-shaped portion 30c.

[0033] In addition, the protruding lengths of the front and rear connecting parts 28c, 28c from the middle part 26c to the right are substantially the same. In addition, the protruding lengths of the front and rear step-shaped parts 30c, 30c from the middle part 26c to the upper side are substantially the same. Therefore, the first connecting part 22c and the second connecting part 24c are arranged at substantially the same positions in the up-down direction and the left-right direction, and are located on the front and rear sides.

[0034] The second terminal fitting 12 b does not include the connecting portion 28 or the stepped portion 30 , and has a flat plate shape extending linearly in the front-rear direction.

[0035] Furthermore, regarding the first to third terminal parts 12a to 12c, as shown in FIG. Figure 6 As shown, the middle portion 26a of the first terminal part 12a and the middle portion 26c of the third terminal part 12c are arranged on both sides of the middle portion 26b of the second terminal part 12b in the vertical direction and overlapped in the vertical projection. The middle portions 26a to 26c are formed into substantially the same shape when viewed in the vertical direction, and overlapped as a whole in the vertical projection. The middle portions 26a to 26c arranged in a mutually overlapping state are provided with predetermined gaps 31 between the opposing surfaces of the middle portion 26a and the middle portion 26b and between the opposing surfaces of the middle portion 26b and the middle portion 26c, respectively, and are arranged in an overlapping state separated from each other in the vertical direction. The vertical dimension of the gap 31 (the distance between the middle portions 26, 26 adjacent in the vertical direction) is substantially the same as the plate thickness dimension of the middle portion 26 in the first embodiment, but can be appropriately changed in consideration of electrical insulation, for example.

[0036] By arranging the three plate-shaped middle portions 26a to 26c in a state of overlapping each other in projection in the plate thickness direction, the ratio of the outer dimension of the middle portions 26a to 26c in the vertical direction (the distance from the upper surface of the middle portion 26a to the lower surface of the middle portion 26c) to the outer dimension of the middle portion 26 in the horizontal direction (the plate width dimension of the middle portion 26) is closer to 1 than when the three middle portions are arranged side by side in the plate width direction.

[0037] In the configuration state of the first to third terminal parts 12a to 12c, the first connection parts 22a to 22c are arranged in parallel with a predetermined distance from each other in the left-right direction, and from the left are the first connection parts 22a, the first connection parts 22b, and the first connection parts 22c. Similarly, the second connection parts 24a to 24c are arranged in parallel with a predetermined distance from each other in the left-right direction, and from the left are the second connection parts 24a, the second connection parts 24b, and the second connection parts 24c. The first connection parts 22a to 22c are arranged on a horizontal plane so that the height positions in the vertical direction are the same by the front step-shaped parts 30a and 30c. Similarly, the second connection parts 24a to 24c are arranged on a horizontal plane so that the height positions in the vertical direction are the same by the rear step-shaped parts 30a and 30c. In the first embodiment, the first connection parts 22a to 22c and the second connection parts 24a to 24c are located on a horizontal plane.

[0038] <Ferrite core 14> For example Figure 3 , 4 As shown, the ferrite core 14 is generally cylindrical with the front-to-back direction as the axial direction. The internal space 32 of the ferrite core 14 has a transversely longer cross-section whose maximum left-right dimension is slightly larger than the maximum up-down dimension. The maximum left-right dimension of the internal space 32 is preferably 1.8 times or less, and more preferably 1.5 times or less relative to the maximum up-down dimension of the internal space 32. In addition, the ferrite core 14 has a predetermined front-to-back dimension, and the front-to-back dimension of the ferrite core 14 is smaller than the front-to-back dimension of the middle portion 26 of each terminal part 12, and in Embodiment 1, is smaller than the separation distance in the front-to-back direction of the front connecting portion 28a (28c) and the rear connecting portion 28a (28c). The ferrite core 14 uses a material that is conventionally known, but in Embodiment 1, the ferrite core 14 is formed of Mn-Zn ferrite.

[0039] The ferrite core 14 is arranged to surround the middle parts 26a to 26c of the first to third terminal parts 12a to 12c. That is, the ferrite core 14 includes an upper part 34 that covers the upper part of the middle part 26a located at the uppermost side, and a lower part 36 that covers the lower part of the middle part 26c located at the lowermost side. In addition, the ferrite core 14 includes a left part 38 that is inserted between the front and rear connecting parts 28a, 28a of the first terminal part 12a and covers the left side of the middle parts 26a to 26c; and a right part 40 that is inserted between the front and rear connecting parts 28c, 28c of the third terminal part 12c and covers the right side of the middle parts 26a to 26c.

[0040] In Embodiment 1, the ferrite core 14 can be divided in the vertical direction, and the ferrite core 14 is composed of an upper ferrite core 42 located on the upper side and a lower ferrite core 44 located on the lower side. That is, the upper ferrite core 42 and the lower ferrite core 44 are both in the shape of a half-split cylinder, and the respective circumferential end surfaces of the upper ferrite core 42 and the lower ferrite core 44 overlap each other in the vertical direction, so that the respective openings are covered with each other, forming an internal space 32 of a substantially rounded rectangular shape.

[0041] In short, the upper portion 34 and the lower portion 36 of the ferrite core 14, each having a predetermined left-right dimension, are formed by the circumferential middle portions of the upper ferrite core 42 and the lower ferrite core 44. In addition, the left circumferential ends of the upper ferrite core 42 and the lower ferrite core 44 overlap each other, thereby forming the left portion 38 of the ferrite core 14. Similarly, the right circumferential ends of the upper ferrite core 42 and the lower ferrite core 44 overlap each other, thereby forming the right portion 40 of the ferrite core 14.

[0042] <Connector Housing 16> The connector housing 16 includes a terminal retaining portion 46 and a core retaining portion 48. In Embodiment 1, the terminal retaining portion 46 and the core retaining portion 48 are formed integrally. The material of the synthetic resin forming the connector housing 16 is not limited, but it is preferably formed of a resin material with high heat resistance. In Embodiment 1, the terminal retaining portion 46 and the core retaining portion 48 constituting the connector housing 16 are both formed of a resin material having higher heat resistance than PVC (polyvinyl chloride), namely PBT (polybutylene terephthalate). In addition, as a resin material having higher heat resistance than PVC, for example, thermoplastic resins such as PBT, PPS (polyphenylene sulfide), PTFE (polytetrafluoroethylene), PAI (polyamide-imide) or thermosetting resins such as PI (polyimide resin) can be listed, and as the material of the connector housing 16, these materials can be appropriately adopted.

[0043] <Terminal Holding Portion 46> like Figure 6 As shown, the terminal retaining portion 46 retains the portions of the first to third terminal parts 12a to 12c except for the first connecting portions 22a to 22c and the second connecting portions 24a to 24c in a buried state. Specifically, the middle portions (middle portions 26a to 26c) in the front-to-back direction of the first to third terminal parts 12a to 12c are substantially completely covered. In other words, the first connecting portions 22a to 22c of the first to third terminal parts 12a to 12c protrude forward from the terminal retaining portion 46, and the second connecting portions 24a to 24c protrude backward from the terminal retaining portion 46. In Embodiment 1, as shown in Figure 3 , 5As shown, the terminal holding portion 46 is provided so as to cover the connecting portion 28a of the first terminal part 12a and the connecting portion 28c of the third terminal part 12c in addition to the intermediate portions 26a to 26c.

[0044] In addition, leg portions 50, 50 protruding outward in the left-right direction are provided on both sides of the rear portion of the terminal holding portion 46 in the left-right direction. The leg portions 50 are provided on the left-right outer sides of the first terminal part 12a and the third terminal part 12c, respectively, and are provided with metal collars 54, each of which has a bolt insertion hole 52 penetrating in the vertical direction. In short, a pair of collars 54, 54 each having a bolt insertion hole 52 is fixed to the leg portions 50, 50 provided in the rear portion of the terminal holding portion 46, and is held on the left-right outer sides of the first terminal part 12a and the third terminal part 12c. And, by means of bolts (not shown) inserted through the bolt insertion holes 52, the ferrite core built-in connector 10 is fixed to the motor or PCU connected to the first connecting portions 22a to 22c or the second connecting portions 24a to 24c of the first to third terminal parts 12a to 12c, or the vehicle-mounted components arranged therebetween. Furthermore, the connector housing 16 is formed as an integrally molded product including the collars 54 , 54 .

[0045] like Figure 3 As shown, the terminal holding portion 46 holds the intermediate portions 26a to 26c arranged to overlap each other in the vertical direction in an embedded state. That is, the terminal holding portion 46 fills the internal space 32 of the ferrite core 14, surrounds the circumference of the intermediate portions 26a to 26c, and is interposed between the intermediate portions 26a to 26c and the ferrite core 14. In addition, the terminal holding portion 46 also fills the gap 31 between the intermediate portions 26a and 26b and the gap 31 between the intermediate portions 26b and 26c arranged to be separated and opposed in the vertical direction, and is provided in a manner to surround the circumference of each intermediate portion 26a to 26c. And, by holding the intermediate portions 26a to 26c in an embedded state by the terminal holding portion 46, the intermediate portions 26a to 26c are positioned in a predetermined configuration in which they overlap in a state separated from each other in the vertical direction. Furthermore, since the gaps 31 between the intermediate portions 26a to 26c are filled with the terminal holding portions 46 made of an electrically insulating resin, conduction (short circuit) between the intermediate portions 26a to 26c of the first to third terminal parts 12a to 12c can be prevented.

[0046] <Core holding portion 48> The surface of the ferrite core 14 is covered by the core holding portion 48. The core holding portion 48 is formed integrally with the terminal holding portion 46, and is provided by covering the outer peripheral surface and the front and rear end surfaces of the ferrite core 14, thereby holding the ferrite core 14 in an embedded state. In addition, the portion of the connector housing 16 that covers the inner peripheral surface of the ferrite core 14 is the terminal holding portion 46 that holds the intermediate portions 26a to 26c of the first to third terminal parts 12a to 12c in an embedded state, and is also the core holding portion 48 that holds the ferrite core 14 in an embedded state.

[0047] In the first embodiment, the terminal holding portion 46 and the core holding portion 48 constituting the connector housing 16 are integrally formed. In particular, by embedding the first to third terminal parts 12a to 12c, the ferrite core 14, and the collars 54, 54 when the connector housing 16 is molded, the ferrite core built-in connector 10 can be obtained as a one-time molded product (an integrally molded product having the ferrite core 14 and the collars 54, 54) by one-time injection molding. Therefore, compared with the case where multiple injection molding processes are required, the number of manufacturing processes can be reduced, and the manufacturing process can be simplified or the manufacturing time can be shortened.

[0048] In the ferrite core built-in connector 10, even if the terminal holding portion 46 and the core holding portion 48 of the connector housing 16 are integrally formed of a resin material harder than PVC, damage to the ferrite core 14 caused by the stress caused by the shrinkage of the connector housing 16 after molding can be avoided.

[0049] That is, the middle parts 26a to 26c of the first to third terminal parts 12a to 12c inserted into the cylindrical ferrite core 14 are in the shape of a plate whose plate thickness dimension is smaller than the plate width dimension, and are arranged in a state of overlapping each other in the plate thickness direction. Therefore, the inner circumferential length of the ferrite core 14 required for mounting on the middle parts 26a to 26c of the first to third terminal parts 12a to 12c is shortened, and the magnetic path length of the ferrite core 14 can be shortened. As a result, the surface area of ​​the ferrite core 14 covered by the core holding part 48 of the connector housing 16 can be reduced, and the amount of resin in the core holding part 48 can be reduced, and the stress applied to the ferrite core 14 due to the shrinkage of the core holding part 48 after molding is reduced. Therefore, the forming material of the connector housing 16 is not easily restricted by the necessity of preventing damage to the ferrite core 14 caused by molding shrinkage, for example, it is not limited to PVC with a small stress caused by molding shrinkage, and can be selected with a large degree of freedom. Therefore, from the viewpoint of strength and durability, the terminal holding portion 46 for holding the first to third terminal parts 12a to 12c in an embedded state and the core holding portion 48 for holding the ferrite core 14 in an embedded state can be integrally formed by a relatively hard resin material suitable as a housing. In particular, in the case where heat resistance is required due to application to automobiles, etc., a resin material such as PBT having better heat resistance than PVC can be selected, and a ferrite core built-in connector 10 having excellent heat resistance can be provided.

[0050] In addition, by shortening the magnetic path length of the ferrite core 14, the magnetic path cross-sectional area of ​​the ferrite core 14 can be reduced while maintaining the impedance performance (noise removal performance) of the ferrite core 14, thereby achieving further miniaturization of the ferrite core 14 and further reduction of the stress caused by the molding shrinkage of the connector housing 16. That is, the impedance performance (inductance) of the ferrite core 14 is calculated by the following mathematical formula 1, but the magnetic path length l in the mathematical formula 1 of the ferrite core 14 of the first embodiment is set to be smaller. Therefore, the magnetic path cross-sectional area S can be reduced while maintaining the necessary impedance performance (L), and the ferrite core 14 can be further miniaturized by reducing the magnetic path cross-sectional area S while maintaining the impedance performance (L). In addition, in mathematical formula 1, L is the inductance of the ferrite core 14, μ is the magnetic permeability of the ferrite core 14, S is the magnetic path cross-sectional area of ​​the ferrite core 14, N is the number of turns of the conductor wound around the ferrite core 14, and l is the magnetic path length of the ferrite core 14.

[0051] [Mathematical formula 1] L=μSN 2 / l

[0052] In the ferrite core built-in connector 10 of the first embodiment, the first connection portion 22 is electrically connected to the motor (not shown), and the second connection portion 24 is electrically connected to the PCU (not shown). The first connection portion 22 protrudes from the connector housing 16 toward the front in the axial direction of the ferrite core 14 and is exposed, and the second connection portion 24 protrudes from the connector housing 16 toward the rear and is exposed, so it is easy to connect the first and second connection portions 22 and 24 to the devices (motor and PCU) arranged on the front and rear sides of the ferrite core built-in connector 10.

[0053] Furthermore, by providing the connecting portions 28a to 28c in the first to third terminal parts 12a to 12c, the first connecting portions 22a to 22c are arranged in parallel with each other in the left-right direction, which is the plate width direction, with gaps therebetween, while the intermediate portions 26a to 26c are arranged to overlap each other in the vertical direction. Thus, the ferrite core 14 can be miniaturized, which corresponds to the connection structure on the motor side at the first connecting portions 22a to 22c and is mounted in the intermediate portions 26a to 26c in an externally inserted state.

[0054] In addition, the connecting parts 28a and 28c in front of the first and third terminal parts 12a and 12c are provided with stepped parts 30a and 30c protruding in one direction, respectively, and the first connecting parts 22a to 22c are arranged at the same height position in the vertical direction when the intermediate parts 26a to 26c overlap each other in the vertical direction. Thus, the ferrite core 14 can be miniaturized, which corresponds to the connection structure on the motor side at the first connecting parts 22a to 22c and is assembled to the intermediate parts 26a to 26c in an externally inserted state.

[0055] In the first embodiment, the second connection parts 24a to 24c are also arranged in parallel and separated from each other in the left-right direction, similarly to the first connection parts 22a to 22c, and are arranged at the same height position in the up-down direction. Thus, the ferrite core 14 can be miniaturized, which corresponds to the connection structure on the PCU side at the second connection parts 24a to 24c and is mounted in the intermediate parts 26a to 26c in an externally inserted state.

[0056] <Implementation Method 2> Below, use Figure 7 The ferrite core built-in connector 60 of the second embodiment of the present invention is described. The ferrite core built-in connector 60 of the second embodiment has the same structure as the ferrite core built-in connector 10 of the first embodiment, but is different in that the core holding portion 64 of the connector housing 62 has an exposure hole 66 for exposing the ferrite core 14. In addition, in the following description, the same reference numerals as those of the first embodiment are marked in the figure for the components and parts that are substantially the same as those of the first embodiment, thereby omitting the detailed description.

[0057] Specifically, an exposure hole 66 penetrating in the up-down direction or the left-right direction is formed in the peripheral wall portion of the core holding portion 64 covering the outer peripheral surface of the ferrite core 14. In the second embodiment, a plurality of exposure holes 66 having a substantially oblong cross-section are formed, and the plurality of exposure holes 66 are arranged in two rows in the front-to-back direction and are separated from each other and arranged at a plurality of locations in the circumferential direction of the core holding portion 64. And, through these plurality of exposure holes 66, the outer peripheral surface of the ferrite core 14 is exposed to the outside.

[0058] In addition, in the core holding portion 64, the portion covering the left portion (38) and the right portion 40 of the ferrite core 14 from the outside in the left-right direction is formed with two exposure holes 66, 66 that are approximately oval in side view and penetrate the core holding portion 64 in the left-right direction. In addition, in the core holding portion 64, the portion covering the upper portion 34 and the lower portion (36) of the ferrite core 14 from the outside in the top-bottom direction is formed with two exposure holes 66, 66 that are approximately oval in top view and penetrate the core holding portion 64 in the top-bottom direction. In addition, one exposure hole 66 is formed in the circumferential direction between the exposure hole 66 that penetrates the core holding portion 64 in the left-right direction and the exposure hole 66 that penetrates the core holding portion 64 in the top-bottom direction.

[0059] In the ferrite core built-in connector 60 of the second embodiment, as in the first embodiment, the amount of resin material used to form the connector housing 62 can be reduced by miniaturizing the ferrite core 14, and the stress acting on the ferrite core 14 due to the shrinkage of the connector housing 62 after molding can be reduced. In addition, in the second embodiment, a plurality of exposure holes 66 are provided in the peripheral wall portion of the core holding portion 64, thereby further reducing the amount of resin material of the core holding portion 64 provided outside the ferrite core 14. As a result, when the core holding portion 64 is molded, damage to the ferrite core 14 caused by shrinkage of the resin material can be further reduced.

[0060] Furthermore, since the outer peripheral surface of the ferrite core 14 is exposed to the outside through the plurality of exposure holes 66, even if the ferrite core 14 generates heat when absorbing noise, the heat can be dissipated to the outside space through the plurality of exposure holes 66, thereby providing a ferrite core built-in connector 60 with excellent thermal performance.

[0061] <Implementation Method 3> Below, use Figure 8 The ferrite core built-in connector 70 according to the third embodiment of the present invention is described. The ferrite core built-in connector 70 according to the third embodiment has, similarly to the ferrite core built-in connector 60 according to the second embodiment, an exposure hole 76 for exposing the ferrite core 14 in the peripheral wall portion of the core holding portion 74 of the connector housing 72. Thus, the ferrite core built-in connector 70 according to the third embodiment can exert the same effect as the ferrite core built-in connector 60 according to the second embodiment.

[0062] In addition, in Embodiment 2, the exposure holes 66 with a substantially oblong cross section are provided, but in Embodiment 3, the exposure holes 76 with a substantially rectangular cross section are provided. The exposure holes 66 of Embodiment 2 are arranged in two rows in the front-to-back direction, but the exposure holes 76 of Embodiment 3 are arranged in one row in the front-to-back direction and are provided at multiple locations in the circumferential direction of the core holding portion 74. The cross-sectional area of ​​each of the exposure holes 76 in Embodiment 3 is larger than that of the exposure holes 66 in Embodiment 2, and the sum of the cross-sectional areas of the plurality of exposure holes 76 is larger than the sum of the cross-sectional areas of the plurality of exposure holes 66 in Embodiment 2. As a result, the resin material of the peripheral wall portion of the core holding portion 74 is less than that of the peripheral wall portion of the core holding portion 64 in Embodiment 2, and as a result, the possibility of damage to the ferrite core 14 caused by shrinkage of the resin material during the molding of the core holding portion 74 can be further reduced.

[0063] <Implementation Method 4> Below, use Fig. 9 A ferrite core built-in connector 80 according to a fourth embodiment of the present invention will be described. The connector housing 82 of the ferrite core built-in connector 80 according to the fourth embodiment includes a first resin portion 84 and a second resin portion 86, wherein the first resin portion 84 holds the terminal component 12 in an embedded state, and the second resin portion 86 holds the first resin portion 84 and the ferrite core 14 in an embedded state.

[0064] The first resin portion 84 holds the intermediate portions 26a to 26c of the first to third terminal parts 12a to 12c, the front and rear connecting portions (28a, 28a) of the first terminal part 12a, and the front and rear connecting portions (28c, 28c) of the third terminal part 12c in an embedded state. The first resin portion 84 covers the outer periphery of the intermediate portions 26a to 26c of the first to third terminal parts 12a to 12c, and fills between the upper and lower opposing surfaces of the intermediate portions 26a to 26c.

[0065] The second resin portion 86 is formed separately from the first resin portion 84 and covers the surface of the ferrite core 14. The second resin portion 86 integrally includes an outer surface covering portion 88 and an inner peripheral filling portion 90, wherein the outer surface covering portion 88 covers the outer peripheral surface and the axial end surfaces of the front and rear sides of the ferrite core 14, and the inner peripheral filling portion 90 is filled between the inner peripheral surface of the ferrite core 14 and the facing surface of the first resin portion 84. The second resin portion 86 may be welded to the first resin portion 84 at the inner peripheral filling portion 90. Since the first resin portion 84 and the second resin portion 86 are formed separately, they can also be formed of different resin materials.

[0066] The ferrite core built-in connector 80 of the fourth embodiment is formed as a secondary molded product (94) which is a molded product of the second resin portion 86. Hereinafter, a method for manufacturing the ferrite core built-in connector 80 of the fourth embodiment will be briefly described.

[0067] First, the first resin portion 84 is injection molded with the first to third terminal parts 12a to 12c and the collars 54, 54 set in the injection molding die of the first resin portion 84. Thus, a primary molded product 92 is formed in which the first to third terminal parts 12a to 12c and the collars 54, 54 are embedded.

[0068] Next, the second resin portion 86 is injection molded with the primary molded product 92 and the ferrite core 14 set in the injection molding die of the second resin portion 86. Thus, the ferrite core built-in connector 80 is formed as a secondary molded product 94 in which the primary molded product 92 and the ferrite core 14 are embedded.

[0069] The ferrite core 14 is set in the injection mold of the second resin portion 86 in a state where the inner peripheral surface is separated from the primary molded product 92. Thus, the ferrite core 14 can be arranged at an appropriate position with high accuracy relative to the primary molded product 92. In addition, the inner peripheral filling portion 90 of the second resin portion 86 is formed between the inner peripheral surface of the ferrite core 14 and the facing surface of the primary molded product 92.

[0070] In this way, by molding the first resin portion 84 and the second resin portion 86 constituting the connector housing 82 separately, the amount of resin used when molding the secondary molded product 94 (second resin portion 86) including the ferrite core 14 in the insert can be reduced by the amount of the first resin portion 84, compared to the case where the entire connector housing is integrally molded. Therefore, when the resin material of the second resin portion 86 is cured, the contraction force applied to the ferrite core 14 can be further reduced, and damage to the ferrite core 14 can be more effectively prevented.

[0071] In addition, since the second resin portion 86 has an inner peripheral filling portion 90, the inner peripheral filling portion 90 is filled between the inner peripheral surface of the ferrite core 14 and the opposing surface of the first resin portion 84, and the inner peripheral filling portion 90 is formed integrally with the outer surface covering portion 88, the ferrite core 14 can be stably maintained in a buried state around the first resin portion 84.

[0072] <Other Implementation Methods> The technology described in this specification is not limited to the embodiments described in the above description and drawings. For example, the following embodiments are also included in the technical scope of the technology described in this specification.

[0073] (1) In the above embodiment, three terminal fittings 12 (first to third terminal fittings 12a to 12c) are provided, but the number of terminal fittings may be plural, and may be two or four or more.

[0074] (2) For example, the plate width of the middle portion of the terminal part may be the same as the plate width of the first and second connecting portions, or may be larger than the plate width of the first and second connecting portions. In addition, the terminal part only needs to be in the form of a strip plate in the middle portion, and it is not necessary to be in the form of a strip plate throughout the entire part. For example, the first and second connecting portions may be in shapes other than strip plates, such as rods, circular ring plates, or U-shaped plates.

[0075] (3) In the above embodiment, an example is shown in which the middle portions 26a to 26c of the first to third terminal parts 12a to 12c are arranged to overlap each other throughout the entirety in the projection in the vertical direction, but the middle portions of the plurality of terminal parts may also partially overlap each other in the projection in the vertical direction. Specifically, for example, the middle portion 26a of the first terminal part 12a in the above embodiment may be arranged at a position deviated to the left relative to the middle portion 26b of the second terminal part 12b, the right side portion of the middle portion 26a overlaps with the middle portion 26b in the vertical direction, and the left side portion of the middle portion 26a does not overlap with the middle portion 26b in the vertical direction.

[0076] (4) In the above embodiment, the middle portion 26a of the first terminal part 12a and the middle portion 26c of the third terminal part 12c overlap with the middle portion 26b of the second terminal part 12b in a manner sandwiched from both sides. However, for example, the middle portion 26b of the second terminal part 12b and the middle portion 26c of the third terminal part 12c may be arranged to overlap with the middle portion 26a of the first terminal part 12a in a manner sandwiched from both sides. In this case, for example, by providing the first terminal part 12a and the third terminal part 12c with stepped portions 30a and 30c protruding from the middle portions 26a and 26c in the same vertical direction and having different protrusion amounts, or by providing a stepped portion between the middle portion 26b of the second terminal part 12b and the first connecting portion 22b instead of providing the first terminal part 12a, the first connecting portions 22a to 22c can be arranged at the same height position in the plate thickness direction.

[0077] (5) The first connecting portions are not limited to being arranged in parallel and separated from each other in the board width direction, and may be arranged at the same position in the board width direction and in parallel and separated from each other in the board thickness direction. Therefore, sometimes no connecting portion is provided in all terminal parts.

[0078] (6) In the case where the first connection portions of a plurality of terminal parts are arranged in parallel and separated from each other in the plate width direction, those first connection portions do not necessarily need to be arranged at the same height position in the plate thickness direction. Therefore, even if a connecting portion is provided on at least one terminal part, it is not necessary to provide a step-shaped portion on the connecting portion.

[0079] (7) The exposure hole may be formed by replacing the portion of the core holding portion that covers the outer peripheral surface of the ferrite core, or may be formed by penetrating the portion of the core holding portion that covers the axial end surface of the ferrite core. In addition, the penetration direction of the exposure hole penetrating the core holding portion is not particularly limited.

[0080] (8) In the second and third embodiments, a plurality of exposure holes 66 and 76 are illustrated in the outer wall of the core retaining portion 48 that passes through the connector housing 16. However, for example, the outer wall of the core retaining portion can be removed, and the core retaining portion can be formed into a concave cross-section that opens toward the periphery formed by the wall portion covering the axial ends and the inner circumference of the ferrite core. This can also reduce the amount of resin material forming the core retaining portion, and can more effectively prevent damage to the ferrite core caused by shrinkage after the core retaining portion is formed. In addition, the portion of the core retaining portion that covers the axial end surface of the ferrite core can be removed, and the core retaining portion can be formed into a concave cross-section that opens in the axial direction. Description of Reference Numerals

[0081] 10 Ferrite core built-in connector (Implementation 1) 12 Terminal parts 12a 1st terminal part 12b Second terminal parts 12c Third terminal parts 14 Ferrite core 16 Connector housing 18 Front through hole 20 Rear through hole 22 (22a-22c) first connection portion 24 (24a-24c) second connection portion 26 (26a-26c) middle part 28 (28a, 28c) connecting portion 30 (30a, 30c) step-shaped portion 31 Gap 32 Internal Space 34 Upper part 36 Lower part 38 Left side 40 Right 42 Upper ferrite core 44 Lower ferrite core 46 Terminal holding portion 48 core holding part 50 Legs 52 Bolt insertion hole 54 Ring 60 Ferrite core built-in connector (Implementation 2) 62 Connector housing 64 core holding part 66 Exposed Hole 70 Ferrite core built-in connector (Implementation 3) 72 Connector housing 74 core holding part 76 Exposed hole 80 ferrite core built-in connector (Implementation 4) 82 connector housing 84 No.1 Resin Department 86 2nd Resin Department 88 outer surface covering 90 Inner filling part 92 One-shot molded products 94 Secondary molded products

Claims

1. A ferrite core built-in connector, comprising: A plurality of terminal parts formed by connecting the first connection portion and the second connection portion by a plate-shaped intermediate portion; a ferrite core arranged to surround the middle portions of the plurality of terminal parts; and The connector housing accommodates the plurality of terminal parts except the first connection portion and the second connection portion and the ferrite core in an embedded state. The intermediate portions of the plurality of terminal parts are arranged with gaps therebetween in a plate thickness direction and overlapped with each other in projection in the plate thickness direction.

2. The ferrite core built-in connector according to claim 1, wherein: At least one of the plurality of terminal parts includes a connecting portion extending from an end portion of the middle portion on the first connecting portion side toward the plate width direction of the middle portion, and the first connecting portion connected to the middle portion via the connecting portion is arranged at a position deviated from an extension line of the connecting portion in the plate width direction. The first connection portions of the plurality of terminal parts overlapped in the plate thickness direction at the intermediate portion are arranged in parallel with gaps therebetween in the plate width direction by the connecting portion.

3. The ferrite core built-in connector according to claim 2, wherein: At least one of the terminal parts having the connecting portion has a step-shaped portion bent into a crank shape in the plate thickness direction at the connecting portion, and the intermediate portion and the first connecting portion provided on both sides of the step-shaped portion are arranged at height positions staggered from each other in the plate thickness direction. The first connection portions of the plurality of terminal parts overlapped in the plate thickness direction at the intermediate portion are arranged at the same height position in the plate thickness direction by the stepped portion.

4. The ferrite core built-in connector according to claim 1 or claim 2, wherein: The connector housing is made of a resin material having higher heat resistance than PVC.

5. The ferrite core built-in connector according to claim 1 or claim 2, wherein: The connector housing has a terminal holding portion and a core holding portion, the terminal holding portion holds the portions of the plurality of terminal parts other than the first connecting portion and the second connecting portion in an embedded state, and the core holding portion is integrally formed with the terminal holding portion to hold the ferrite core in an embedded state.

6. The ferrite core built-in connector according to claim 1 or claim 2, wherein: The connector housing has a first resin portion and a second resin portion, the first resin portion holds the portions of the plurality of terminal parts other than the first connecting portion and the second connecting portion in an embedded state, and the second resin portion is formed separately from the first resin portion to hold the first resin portion and the ferrite core in an embedded state.

7. The ferrite core built-in connector according to claim 1 or claim 2, wherein: The connector housing includes an exposure hole that exposes the ferrite core.

8. The ferrite core built-in connector according to claim 1 or claim 2, wherein: The first connection portion and the second connection portion of each of the terminal parts protrude from the connector housing at both sides in the axial direction of the cylindrical ferrite core.

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