Ferrite core built-in connector

Abstract

To provide a ferrite core built-in connector capable of suppressing damages on a ferrite core and having an excellent degree of selection freedom of a resin material to be used.SOLUTION: A ferrite core built-in connector 10 comprises: a plurality of terminal metal fittings 12 each formed by coupling a first connection part 22 and a second connection part 24 by a band plate-like intermediate part 26; a ferrite core 14 arranged so as to surround the circumference of the intermediate parts 26 of the plurality of terminal metal fittings 12 in a batch; and a connector housing 16 that accommodates the ferrite core 14 and portions other than the first connection parts 22 and the second connection parts 24 of the plurality of terminal metal fittings 12 in an embedded state. The intermediate parts 26 of the plurality of terminal metal fittings 12 are arranged in a state where they are overlapped with each other in thickness-direction projection while being separated by a gap 31 therebetween in a thickness direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a connector with a built-in ferrite core. [Background technology]

[0002] Conventionally, connectors with built-in ferrite cores, in which a ferrite core is disposed around a terminal fitting, have been used to suppress noise in power transmission between in-vehicle devices that switch from an AC circuit to a DC circuit, such as between a motor and an inverter, as disclosed in Patent Document 1. However, when a connector is formed by embedding a ferrite core together with a terminal fitting in a synthetic resin connector housing by insert molding, the ferrite core may be damaged due to the influence of contraction forces during resin hardening. Therefore, Patent Document 2 proposes a joint connector in which a core molded body, which is pre-enclosed by a protective portion made of a resin material softer than the connector housing, and to which terminal fittings are attached, is molded as an insert product. In this joint connector, the ferrite core is surrounded by a protective portion made of a resin material softer than the connector housing, so that the contraction forces of the connector housing during molding are absorbed by the protective portion, thereby suppressing damage to the ferrite core. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-295340 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-53202 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the solution in Patent Document 2 requires that the protective part be made of a resin material that is softer than the connector housing. Therefore, for example, if high heat resistance is required, the resin material of the protective part may not be able to meet the heat resistance requirement.

[0005] Therefore, a connector with a built-in ferrite core is disclosed that suppresses damage to the ferrite core and provides excellent freedom in selecting the resin material to be used. [Means for solving the problem]

[0006] The connector with a built-in ferrite core of the present disclosure comprises a plurality of terminal fittings each having a first connection portion and a second connection portion connected by a strip-shaped intermediate portion, a ferrite core arranged to collectively surround the intermediate portions of the plurality of terminal fittings, and a connector housing that accommodates the ferrite core and portions of the plurality of terminal fittings excluding the first connection portion and the second connection portion in an embedded state, and the intermediate portions of the plurality of terminal fittings are arranged with gaps between them in the plate thickness direction and overlapping each other when projected in the plate thickness direction. The connector housing has a first resin portion that holds portions of the plurality of terminal fittings excluding the first connection portions and the second connection portions in an embedded state, and a second resin portion that is molded separately from the first resin portion and that holds the first resin portion and the ferrite core in an embedded state. It is something that exists. In another aspect of the present disclosure, a connector with a built-in ferrite core comprises a plurality of terminal fittings each having a first connection portion and a second connection portion connected by a strip-shaped intermediate portion, a ferrite core arranged to surround the intermediate portions of the plurality of terminal fittings, and a connector housing that accommodates the portions of the plurality of terminal fittings excluding the first connection portion and the second connection portion and the ferrite core in an embedded state, wherein the intermediate portions of the plurality of terminal fittings are arranged with gaps between them in the plate thickness direction and overlapping each other when projected in the plate thickness direction, and the connector housing includes an exposure hole that exposes the ferrite core. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a connector with a built-in ferrite core that suppresses damage to the ferrite core and has excellent freedom in selecting the resin material to be used. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a ferrite core built-in connector according to a first embodiment with a connector housing transparent. [Figure 2] FIG. 2 is a front view of the ferrite core built-in connector shown in FIG. [Figure 3] 3 is a cross-sectional view of the ferrite core built-in connector shown in FIG. 1, and corresponds to the cross section taken along line III-III in FIG. [Figure 4]FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Figure 5] FIG. 5 is a cross-sectional view taken along line VV in FIG. [Figure 6] 6 is an exploded perspective view showing a terminal fitting that constitutes the ferrite core built-in connector shown in FIG. [Figure 7] FIG. 7 is a perspective view showing a ferrite core built-in connector according to the second embodiment. [Figure 8] FIG. 8 is a perspective view showing a ferrite core built-in connector according to the third embodiment. [Figure 9] FIG. 9 is a vertical cross-sectional view of a ferrite core built-in connector according to the fourth embodiment, and corresponds to FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] <Description of Embodiments of the Present Disclosure> First, embodiments of the present disclosure will be listed and described. The ferrite core built-in connector of the present disclosure includes: (1) A connector comprising a plurality of terminal fittings each having a first connection portion and a second connection portion connected by a strip-shaped intermediate portion; a ferrite core arranged to surround the intermediate portions of the plurality of terminal fittings; and a connector housing that accommodates the portions of the plurality of terminal fittings excluding the first connection portion and the second connection portion and the ferrite core in an embedded state, wherein the intermediate portions of the plurality of terminal fittings are arranged with gaps between them in the plate thickness direction and overlapping each other when projected in the plate thickness direction.

[0010] According to the connector with a built-in ferrite core of the present disclosure, the intermediate portions of multiple strip-shaped terminal fittings are arranged with gaps between them in the thickness direction and overlapping each other when projected in the thickness direction. Furthermore, a noise-reducing ferrite core is arranged to collectively surround the intermediate portions of each terminal fitting, which are arranged overlapping with gaps in the thickness direction. This allows the circumferential length of the ferrite core surrounding the multiple intermediate portions stacked in the thickness direction to be shorter than when the ferrite core surrounds the intermediate portions arranged parallel to each other with gaps in the width direction, thereby enabling the ferrite core to be made more compact. As a result, when the connector housing is injection-molded so that the intermediate portions of the terminal fittings and the ferrite core are embedded in the connector housing, the amount of resin disposed around the ferrite core can be reduced. This reduces the contraction force of the resin acting on the ferrite core when the resin hardens, thereby preventing damage to the ferrite core during molding of the connector housing. Therefore, there is no need to adopt a structure such as that described in Patent Document 2, in which the ferrite core is surrounded by a resin material that is softer than the connector housing. When heat resistance is required, even if the connector housing is molded from a relatively hard resin material that has excellent heat resistance (for example, a material with high heat resistance such as PBT (polybutylene terephthalate)), it is possible to reduce the risk of damage to the ferrite core and also improve the freedom of selection of the resin material for the connector housing.

[0011] Furthermore, by shortening the perimeter (magnetic path length) of the ferrite core, it is possible to reduce the cross-sectional area of ​​the magnetic path of the ferrite core while maintaining the impedance performance (noise suppression performance) of the ferrite core, which allows for further miniaturization of the ferrite core and reduces the contraction force acting on the ferrite core when the connector housing hardens, making it possible to more effectively prevent damage to the ferrite core.

[0012] (2) In (1), it is preferable that at least one of the plurality of terminal fittings has a connecting portion extending from the end of the intermediate portion on the side of the first connection portion in the plate width direction of the intermediate portion, the first connection portion connected to the intermediate portion by the connecting portion is positioned at a position offset from the extension of the connecting portion in the plate width direction, and the first connection portions of the plurality of terminal fittings overlapping in the plate thickness direction in the intermediate portion are arranged in parallel with each other in the plate width direction, separated by gaps, by the connecting portion.

[0013] That is, due to constraints based on the shape of the mating terminal, it may be necessary to arrange the first connection portions of multiple terminal fittings in parallel with gaps from each other in the plate width direction. Even in such cases, by providing a connecting portion extending from the intermediate portion in the plate width direction between the intermediate portion and the first connection portion and arranging the first connection portion at a position offset in the plate width direction from the extension of the intermediate portion, it is possible to make the intermediate portions of the multiple terminal fittings overlap each other in the plate thickness direction. As a result, even in a structure in which the first connection portions of multiple terminal fittings are arranged in parallel in the plate width direction, it is possible to enjoy the effects of reducing the amount of resin in the connector housing by miniaturizing the ferrite core disclosed herein and maintaining impedance performance by shortening the magnetic path length.

[0014] (3) In (1) or (2), it is preferable that at least one of the terminal fittings having the connecting portion has a stepped portion at the connecting portion that is bent in a crank shape in the plate thickness direction, the intermediate portion and the first connecting portion provided on both sides of the stepped portion are positioned at height positions that are offset from each other in the plate thickness direction, and the first connecting portions of the multiple terminal fittings that overlap in the plate thickness direction at the intermediate portion are positioned at the same height position in the plate thickness direction by the stepped portion.

[0015] That is, due to constraints imposed by the shape of the mating terminal, it may be necessary not only to arrange the first connection portions of multiple terminal fittings in parallel with gaps in the plate width direction, but also to arrange them at the same height in the plate thickness direction. Even in such cases, by providing a stepped portion at the connecting portion of the terminal fittings and arranging the intermediate portions and the first connection portions at different heights, it is possible to make the intermediate portions of multiple terminal fittings overlap each other in the plate thickness direction. As a result, even in a structure in which the first connection portions of multiple terminal fittings are arranged in parallel in the plate width direction at the same height in the plate thickness direction, it is possible to enjoy the benefits of reducing the amount of resin in the connector housing by miniaturizing the ferrite core disclosed herein and maintaining impedance performance by shortening the magnetic path length.

[0016] (4) In any one of (1) to (3), the connector housing is preferably made of a resin material with higher heat resistance than PVC. The ferrite core surrounding the multiple intermediate portions stacked in the plate thickness direction is miniaturized, and the amount of resin disposed around the ferrite core is reduced. This prevents damage to the ferrite core even when the connector housing is made of a resin material with higher heat resistance than PVC (polyvinyl chloride). Therefore, unlike Patent Document 2, it is not necessary to surround the ferrite core with a resin material (e.g., PVC) softer than the connector housing. This allows the connector housing to be molded from a resin material with higher heat resistance than PVC. As a result, the connector can advantageously meet the heat resistance requirements. Resin materials with higher heat resistance than PVC preferably include thermoplastic resins such as PBT, PPS (polyphenylene sulfide), PTFE (polytetrafluoroethylene), and PAI (polyamide-imide), and thermosetting resins such as PI (polyimide resin).

[0017] (5) In any one of (1) to (4), it is preferable that the connector housing has a terminal holding portion that holds the portions of the multiple terminal fittings excluding the first connection portion and the second connection portion in an embedded state, and a core holding portion that is integrally molded with the terminal holding portion and holds 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 one-step molded product, eliminating the need for multiple injection molding processes and enabling shorter manufacturing times due to simplified manufacturing processes. In particular, damage to the ferrite core due to stress acting when the resin shrinks after molding is unlikely to occur, so damage to the ferrite core can be avoided even if the core holding portion and the terminal holding portion are integrally molded from the same hard resin.

[0019] (6) In any one of (1) to (4), it is preferable that the connector housing has a first resin portion that holds the portions of the terminal fittings excluding the first connection portions and the second connection portions in an embedded state, and a second resin portion that is molded separately from the first resin portion and holds the first resin portion and the ferrite core in an embedded state.

[0020] The connector housing is molded separately into a first resin portion that holds multiple terminal fittings in an embedded state and a second resin portion that holds the first resin portion and the ferrite core in an embedded state. Therefore, the first resin portion that holds the terminal fittings in an embedded state is formed as a primary molded product, and then the second resin portion is injection molded using the primary molded product and the ferrite core as an insert, thereby forming a ferrite core-integrated connector as a secondary molded product. This allows the amount of resin in the secondary molded product, which includes the ferrite core as an insert, to be reduced by the amount of resin for the first resin portion, further reducing the contraction force applied to the ferrite core when the resin material of the second resin portion hardens, thereby more effectively preventing or suppressing damage to the ferrite core.

[0021] (7) In any one of (1) to (6), it is preferable that the connector housing includes an exposure hole that exposes the ferrite core. This is because the exposure hole reduces the amount of resin in the connector housing, and damage to the ferrite core due to contraction force when the resin material of the connector housing hardens can be more effectively prevented or suppressed.

[0022] (8) In any one of (1) to (7), it is preferable that the first connecting portion and the second connecting portion of each terminal fitting protrude and are exposed from the connector housing on both axial sides of the cylindrical ferrite core, so that, for example, the first connecting portion can be arranged to be connectable to a mating connector, while the second connecting portion can be connected to an internal circuit of an in-vehicle device or a terminal of an electric wire extending from the in-vehicle device.

[0023] <Details of the embodiment of the present disclosure> Specific examples of the ferrite core built-in connector of the present disclosure are described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0024] <Embodiment 1> A ferrite core built-in connector 10 according to a first embodiment of the present disclosure will be described below with reference to FIGS. 1 to 6. The ferrite core built-in connector 10 is a connector for connecting, for example, a motor and a PCU (power control unit). One end of a terminal fitting 12 in the ferrite core built-in connector 10 is electrically connected to the motor (not shown), and the other end of the terminal fitting 12 is electrically connected to the PCU (not shown). Note that the ferrite core built-in connector 10 can be positioned in any orientation, but in the following description, the upper side will be referred to as the upper side in FIG. 1, the lower side as the lower side in FIG. 1, the front side as the left side in FIG. 4, the rear side as the right side in FIG. 4, the left side as the left side in FIG. 2, and the right side as the right side in FIG. 2. Note that, in some cases, when multiple identical components are shown, only some of the components will be designated by reference numerals, and the reference numerals will be omitted for the other components.

[0025] <Ferrite core built-in connector 10> The connector 10 with a built-in ferrite core includes a terminal fitting 12, a ferrite core 14 that is disposed around the terminal fitting 12, and a connector housing 16 that houses the terminal fitting 12 and the ferrite core 14. Note that in Figure 1, the connector housing 16 is shown in a state where the internal components can be seen through.

[0026] <Terminal fitting 12> In the first embodiment, a plurality of terminal fittings 12 are provided, including three terminal fittings: a first terminal fitting 12a, a second terminal fitting 12b, and a third terminal fitting 12c. Each terminal fitting 12 (the first to third terminal fittings 12a to 12c) is configured as a bus bar and is made of a conductive metal such as copper, a copper alloy, aluminum, or an aluminum alloy. The first to third terminal fittings 12a to 12c are generally strip-shaped and extend in the front-rear direction, with the thickness direction being the up-down direction and the width direction being the left-right direction. The strip-shaped first to third terminal fittings 12a to 12c have a thickness dimension that is smaller than the width dimension. The first to third terminal fittings 12a to 12c have a substantially constant length dimension (front-rear dimension) as a whole, and the front and rear ends of the first to third terminal fittings 12a to 12c are aligned in the left-right direction at the same position in the front-rear direction. The first to third terminal fittings 12a to 12c have substantially the same widthwise dimension (left-right dimension) in areas other than the areas 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 fittings 12a to 12c, penetrating each of them in the plate thickness direction (vertical direction). Furthermore, a substantially circular rear through-hole 20 is formed at the rear end of each of the first to third terminal fittings 12a to 12c, penetrating each of them in the plate thickness direction (vertical direction). This provides first connection portions 22 (respectively, first connection portions 22a to 22c) at the front end, which is one end of each of the first to third terminal fittings 12a to 12c, and the first connection portions 22a to 22c are electrically connected to a motor (not shown). Furthermore, a second connection portion 24 (respectively, second connection portions 24a to 24c) is formed at the rear end, which is the other end of each of the first to third terminal fittings 12a to 12c, and the second connection portions 24a to 24c are electrically connected to a PCU (not shown). In the first to third terminal fittings 12a to 12c, the intermediate portion in the front-rear direction between each of the first connecting portions 22 and each of the second connecting portions 24 is defined as an intermediate portion 26 (respectively, intermediate portions 26a to 26c). In this manner, each terminal fitting 12 has a structure in which the first connecting portion 22 and the second connecting portion 24 are connected by the intermediate portion 26. At least the intermediate portion 26 of each terminal fitting 12 is formed in a strip shape extending in the front-rear direction, with the thickness dimension being smaller than the width dimension. In the first embodiment, the width dimension of the intermediate portion 26 is smaller than the width dimensions of the first and second connecting portions 22, 24, which enables the magnetic path length of the ferrite core 14 disposed surrounding the periphery of the intermediate portion 26 to be set shorter. The width dimension of the intermediate portion 26 may be the same as or larger than the first and second connecting portions 22, 24.

[0028] On both the front and rear sides of the intermediate portion 26a of the first terminal fitting 12a, connecting portions 28a are provided, protruding leftward from both the front and rear ends of the intermediate portion 26a. A first connecting portion 22a extends forward from the left end of the front connecting portion 28a, and a second connecting portion 24a extends rearward from the left end of the rear connecting portion 28a. As a result, the first connecting portion 22a is positioned leftward relative to the forward extension of the intermediate portion 26a, and the second connecting portion 24a is positioned leftward relative to the rearward extension of the intermediate portion 26a.

[0029] As shown in Figures 5 and 6, each connecting portion 28a has a step portion 30a that extends in a crank-like bend in the plate thickness direction. The step portion 30a is provided at the end of the connecting portion 28a on the intermediate portion 26a side and protrudes downward from the connecting end of the connecting portion 28a where the intermediate portion 26a is connected. Therefore, the first connecting portion 22a and the intermediate portion 26a, which are arranged on both sides of the front step portion 30a, are positioned at height positions that are offset from each other in the plate thickness direction (vertical direction), and the first connecting portion 22a is positioned lower than the intermediate portion 26a due to the step portion 30a. Similarly, the second connecting portion 24a and the intermediate portion 26a, which are arranged on both sides of the rear step portion 30a, are positioned at height positions that are different from each other in the plate thickness direction (vertical direction), and the second connecting portion 24a is positioned lower than the intermediate portion 26a due to the step portion 30a.

[0030] The front and rear connecting portions 28a, 28a have approximately the same length of protrusion to the left from the intermediate portion 26a. The front and rear stepped portions 30a, 30a have approximately the same length of protrusion downward from the intermediate portion 26a. Therefore, the first connecting portion 22a and the second connecting portion 24a are disposed at approximately the same positions in the up-down and left-right directions, and are located on both the front and rear sides.

[0031] The third terminal fitting 12c is provided with connecting portions 28c that protrude rightward from both front and rear ends of the intermediate portion 26c. right The first connecting portion 22c extends forward from the end portion, and the rear connecting portion 28c right The second connecting portion 24c extends rearward from the end portion. As a result, the first connecting portion 22c extends forward in response to the forward extension of the intermediate portion 26c. right The second connecting portion 24c is disposed at a position offset toward the rear of the intermediate portion 26c. right It is positioned in a position offset to the left.

[0032] As shown in FIGS. 5 and 6 , each connecting portion 28c has a step portion 30c that extends in a crank-like bend in the plate thickness direction. The step portion 30c is provided at the end of the connecting portion 28c on the intermediate portion 26c side and protrudes upward from the connecting end with the intermediate portion 26c. Therefore, the first connecting portion 22c and the intermediate portion 26c, which are arranged on both sides of the front step portion 30c, are located at different heights in the plate thickness direction (vertical direction), and the first connecting portion 22c is located above the intermediate portion 26c due to the step portion 30c. Similarly, the second connecting portion 24c and the intermediate portion 26c, which are arranged on both sides of the rear step portion 30c, are located at different heights in the plate thickness direction (vertical direction), and the second connecting portion 24c is located above the intermediate portion 26c due to the step portion 30c.

[0033] The front and rear connecting portions 28c, 28c have substantially the same protrusion length to the right from the intermediate portion 26c. The front and rear stepped portions 30c, 30c have substantially the same protrusion length upward from the intermediate portion 26c. Therefore, the first connecting portion 22c and the second connecting portion 24c are disposed at substantially the same positions in the up-down and left-right directions, and are located on both the front and rear sides.

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

[0035] The first to third terminal fittings 12a to 12c are as shown in FIG. 5As shown in Fig. 1, the intermediate portion 26a of the first terminal fitting 12a and the intermediate portion 26c of the third terminal fitting 12c are positioned on both sides of the intermediate portion 26b of the second terminal fitting 12b in the vertical direction and are arranged in an overlapping state when projected in the vertical direction. The intermediate portions 26a-26c have substantially the same shape when viewed in the vertical direction and are entirely overlapping when projected in the vertical direction. The overlapping intermediate portions 26a-26c are arranged spaced apart from each other in the vertical direction, with a predetermined gap 31 provided between the opposing surfaces of the intermediate portions 26a and 26b and between the opposing surfaces of the intermediate portions 26b and 26c. The vertical dimension of the gap 31 (the distance between adjacent intermediate portions 26, 26 in the vertical direction) is substantially the same as the plate thickness of the intermediate portion 26 in the first embodiment, but this can be changed as appropriate, taking into account, for example, electrical insulation properties, etc.

[0036] The three plate-shaped intermediate portions 26a to 26c are arranged so as to overlap each other when projected in the plate thickness direction, so that the ratio between the vertical outer dimensions of the intermediate portions 26a to 26c (the distance from the top surface of the intermediate portion 26a to the bottom surface of the intermediate portion 26c) and the horizontal outer dimensions of the intermediate portions 26 (the plate width dimensions of the intermediate portions 26) is closer to 1 than when the three intermediate portions are arranged in parallel in the plate width direction.

[0037] With the first to third terminal fittings 12a to 12c arranged in this manner, the first connection portions 22a to 22c are arranged in parallel at a predetermined distance from one another in the left-right direction, and are numbered from left to right as first connection portion 22a, first connection portion 22b, and first connection portion 22c. Similarly, the second connection portions 24a to 24c are arranged in parallel at a predetermined distance from one another in the left-right direction, and are numbered from left to right as second connection portion 24a, second connection portion 24b, and second connection portion 24c. The first connection portions 22a to 22c are arranged at the same height in the up-down direction by the front stepped portions 30a and 30c, and are arranged on a single horizontal plane. Similarly, the second connection portions 24a to 24c are arranged on a single horizontal plane, with their vertical height positions being the same due to the rear step portions 30a, 30c, and in embodiment 1, the first connection portions 22a to 22c and the second connection portions 24a to 24c are located on a single horizontal plane.

[0038] <Ferrite core 14> As shown in Figures 3 and 4, the ferrite core 14 is generally cylindrical with its axis extending in the front-to-rear direction. The internal space 32 of the ferrite core 14 has a horizontally elongated cross section whose maximum left-to-right dimension is slightly larger than its maximum up-to-down dimension. The maximum left-to-right dimension of the internal space 32 is preferably 1.8 times or less, and more preferably 1.5 times or less, of the maximum up-to-down dimension of the internal space 32. The ferrite core 14 also has a predetermined front-to-rear dimension, which is smaller than the front-to-rear dimension of the intermediate portion 26 of each terminal fitting 12 and, in the first embodiment, is smaller than the front-to-rear distance between the front connecting portion 28a (28c) and the rear connecting portion 28a (28c). While a conventionally known material may be used for the ferrite core 14, in the first embodiment, the ferrite core 14 is formed of Mn-Zn ferrite.

[0039] The ferrite core 14 is disposed so as to collectively surround the peripheries of the intermediate portions 26a-26c of the first to third terminal fittings 12a-12c. That is, the ferrite core 14 includes an upper portion 34 that covers the upper side of the uppermost intermediate portion 26a and a lower portion 36 that covers the lower side of the lowermost intermediate portion 26c. The ferrite core 14 also includes a left portion 38 that is inserted between the front and rear connecting portions 28a, 28a of the first terminal fitting 12a and covers the left sides of the intermediate portions 26a-26c, and a right portion 40 that is inserted between the front and rear connecting portions 28c, 28c of the third terminal fitting 12c and covers the right sides of the intermediate portions 26a-26c.

[0040] In the first embodiment, the ferrite core 14 can be divided in the vertical direction, and 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 semi-cylindrical, and the circumferential end faces of the upper ferrite core 42 and the lower ferrite core 44 are overlapped with each other in the vertical direction, so that the openings of the upper ferrite core 42 and the lower ferrite core 44 are mutually covered, thereby forming an internal space 32 having a substantially rounded rectangular shape.

[0041] In other words, 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 intermediate portions of the upper ferrite core 42 and the lower ferrite core 44. The left circumferential end portions of the upper ferrite core 42 and the lower ferrite core 44 are overlapped to form the left portion 38 of the ferrite core 14. Similarly, the right portion 40 of the ferrite core 14 is formed by overlapping the right circumferential end portions of the upper ferrite core 42 and the lower ferrite core 44.

[0042] <Connector housing 16> The connector housing 16 includes a terminal holding portion 46 and a core holding portion 48. In the first embodiment, the terminal holding portion 46 and the core holding portion 48 are integrally formed. The material of the synthetic resin forming the connector housing 16 is not limited, but it is preferable that both be formed of a highly heat-resistant resin material. In the first embodiment, the terminal holding portion 46 and the core holding portion 48 constituting the connector housing 16 are both formed of PBT (polybutylene terephthalate), which is a resin material having higher heat resistance than PVC (polyvinyl chloride). Examples of resin materials having higher heat resistance than PVC include thermoplastic resins such as PBT, PPS (polyphenylene sulfide), PTFE (polytetrafluoroethylene), and PAI (polyamide-imide), and thermosetting resins such as PI (polyimide resin), and these materials can be suitably used as the material for the connector housing 16.

[0043] <Terminal holding part 46> figure 5 3 and 5, the terminal holding portion 46 holds the first to third terminal fittings 12a to 12c in an embedded state, excluding the first connecting portions 22a to 22c and the second connecting portions 24a to 24c. Specifically, it substantially entirely covers the front-rear direction intermediate portions (intermediate portions 26a to 26c) of the first to third terminal fittings 12a to 12c. In other words, the first connecting portions 22a to 22c of the first to third terminal fittings 12a to 12c protrude forward from the terminal holding portion 46, and the second connecting portions 24a to 24c protrude rearward from the terminal holding portion 46. In the first embodiment, as shown in FIGS. 3 and 5, the terminal holding portion 46 is provided to cover not only the intermediate portions 26a to 26c but also the connecting portion 28a of the first terminal fitting 12a and the connecting portion 28c of the third terminal fitting 12c.

[0044] Furthermore, leg portions 50, 50 protruding outward in the left-right direction are provided on both left-right sides of the rear portion of the terminal holding portion 46. The leg portions 50 are provided outward in the left-right direction from the first terminal fittings 12a and the third terminal fittings 12c, respectively, and each include a metal collar 54 having a bolt insertion hole 52 passing therethrough in the up-down direction. In other words, a pair of collars 54, 54 each having a bolt insertion hole 52 are fixed to the leg portions 50, 50 provided in the rear portion of the terminal holding portion 46, and are held outward in the left-right direction from the first terminal fittings 12a and the third terminal fittings 12c. The ferrite core built-in connector 10 is fixed to a motor or PCU connected to the first connecting portions 22a-22c or the second connecting portions 24a-24c of the first to third terminal fittings 12a-12c, or to an in-vehicle component disposed between them, by bolts (not shown) inserted into the bolt insertion holes 52. The connector housing 16 is formed as an integrally molded product having collars 54, 54.

[0045] As shown in FIG. 3 , the terminal holding portion 46 holds the intermediate portions 26a-26c in an embedded state, which are arranged so as to overlap each other in the vertical direction. That is, the terminal holding portion 46 fills the internal space 32 of the ferrite core 14, surrounds the peripheries of the intermediate portions 26a-26c, and is interposed between the intermediate portions 26a-26c and the ferrite core 14. The terminal holding portion 46 also fills the gap 31 between the intermediate portions 26a, 26b and the gap 31 between the intermediate portions 26b, 26c, which are arranged opposite each other and spaced apart in the vertical direction, and is provided so as to surround the peripheries of each of the intermediate portions 26a-26c. Since the terminal holding portion 46 holds the intermediate portions 26a-26c in an embedded state, the intermediate portions 26a-26c are positioned in a predetermined overlapping arrangement while being spaced apart from each other in the vertical direction. Furthermore, the gaps 31 between the intermediate portions 26a to 26c are filled with terminal holding portions 46 made of electrically insulating resin, thereby preventing electrical continuity (short circuit) between the intermediate portions 26a to 26c of the first to third terminal fittings 12a to 12c.

[0046] <Core holding part 48> The surface of the ferrite core 14 is covered by a core holding portion 48. The core holding portion 48 is formed integrally with the terminal holding portion 46, and is provided to cover the outer peripheral surface and front and rear end faces of the ferrite core 14, thereby holding the ferrite core 14 in an embedded state. The portion of the connector housing 16 covering the inner peripheral surface of the ferrite core 14 is both the terminal holding portion 46 that holds the intermediate portions 26a to 26c of the first to third terminal fittings 12a to 12c in an embedded state, and 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 that constitute the connector housing 16 are integrally formed. In particular, the first to third terminal fittings 12a to 12c, the ferrite core 14, and the collars 54, 54 are inserted when the connector housing 16 is molded, so that the ferrite core built-in connector 10 can be obtained as a primary molded product (an integrally molded product including the ferrite core 14 and the collars 54, 54) by a single injection molding. Therefore, compared to when multiple injection molding steps are required, the number of manufacturing steps can be reduced, simplifying the manufacturing process and shortening the manufacturing time.

[0048] In the connector 10 with a built-in ferrite core, even though the terminal holding portion 46 and the core holding portion 48 of the connector housing 16 are integrally molded from a resin material harder than PVC, damage to the ferrite core 14 due to acting stress caused by shrinkage of the connector housing 16 after molding is avoided.

[0049] That is, the intermediate portions 26a-26c of the first through third terminal fittings 12a-12c inserted into the cylindrical ferrite core 14 are plate-shaped, with a thickness dimension smaller than the width dimension, and are arranged to overlap each other in the thickness direction. Therefore, the inner circumferential length of the ferrite core 14 required for fitting to the intermediate portions 26a-26c of the first through third terminal fittings 12a-12c is shortened, thereby enabling the magnetic path length of the ferrite core 14 to be shortened. As a result, the surface area of ​​the ferrite core 14 covered by the core holding portion 48 of the connector housing 16 can be reduced, thereby reducing the amount of resin in the core holding portion 48 and reducing the stress applied to the ferrite core 14 due to shrinkage of the core holding portion 48 after molding. Therefore, the material for forming the connector housing 16 is not limited by the need to prevent damage to the ferrite core 14 due to molding shrinkage, and can be selected with great flexibility, without being limited to, for example, PVC, which exerts little stress due to molding shrinkage. Therefore, the terminal holding portion 46 that holds the first to third terminal fittings 12a to 12c in an embedded state and the core holding portion 48 that holds the ferrite core 14 in an embedded state can be integrally molded from a relatively hard resin material that is suitable for a housing from the standpoint of strength and durability. In particular, when heat resistance is required for application to an automobile, it is possible to provide a ferrite core built-in connector 10 that has excellent heat resistance by selecting a resin material such as PBT, which has better heat resistance than PVC.

[0050] Furthermore, by shortening the magnetic path length of the ferrite core 14, it is possible to reduce the magnetic path cross-sectional area of ​​the ferrite core 14 while maintaining the impedance performance (noise removal performance) of the ferrite core 14, thereby achieving further miniaturization of the ferrite core 14 and a corresponding further reduction in the acting stress due to molding shrinkage of the connector housing 16. That is, the impedance performance (inductance) of the ferrite core 14 is calculated by the following equation 1, and the ferrite core 14 of embodiment 1 has a small magnetic path length l in equation 1. Therefore, it is possible to reduce the magnetic path cross-sectional area S while maintaining the required impedance performance (L), and by reducing the magnetic path cross-sectional area S, it is possible to further reduce the size of the ferrite core 14 while maintaining the impedance performance (L). In Equation 1, L is the inductance of the ferrite core 14, μ is the magnetic permeability of the ferrite core 14, S is the cross-sectional area of ​​the magnetic path 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]

number

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

[0053] Furthermore, by providing the linking portions 28a-28c on the first to third terminal fittings 12a-12c, the first connecting portions 22a-22c are arranged in parallel with gaps in the left-right direction, which is the plate width direction, while the intermediate portions 26a-26c are arranged overlapping each other in the up-down direction. This makes it possible to reduce the size of the ferrite core 14 that is attached to the intermediate portions 26a-26c in an extrapolated state, while still allowing the first connecting portions 22a-22c to correspond to the connection structure on the motor side.

[0054] Furthermore, the front connecting portions 28a, 28c of the first and third terminal fittings 12a, 12c are provided with stepped portions 30a, 30c that protrude upward or downward, and the first connecting portions 22a, 22c are arranged at the same height in the vertical direction with the intermediate portions 26a-26c overlapping each other in the vertical direction. This allows the first connecting portions 22a-22c to be compatible with the connection structure on the motor side, while also enabling the miniaturization of the ferrite core 14 that is attached in an extrapolated state to the intermediate portions 26a-26c.

[0055] In the first embodiment, the second connection portions 24a to 24c are also arranged in parallel and spaced apart from each other in the left-right direction, and at the same height as each other in the up-down direction, similar to the first connection portions 22a to 22c. This allows the second connection portions 24a to 24c to be compatible with the connection structure on the PCU side, while also enabling the miniaturization of the ferrite core 14 that is attached in an extrapolated state to the intermediate portions 26a to 26c.

[0056] <Embodiment 2> A ferrite core built-in connector 60 according to a second embodiment of the present disclosure will be described below with reference to Figure 7. The ferrite core built-in connector 60 according to the second embodiment has a structure similar to that of the ferrite core built-in connector 10 according to the first embodiment, but differs in that a core holding portion 64 of a connector housing 62 has an exposure hole 66 that exposes the ferrite core 14. In the following description, members and parts that are substantially the same as those in the first embodiment are denoted by the same reference numerals in the drawings, and detailed description thereof will be omitted.

[0057] Specifically, exposure holes 66 that penetrate in the up-down or left-right direction are formed in the peripheral wall portion of the core holding portion 64 that covers the outer peripheral surface of the ferrite core 14. In the second embodiment, a plurality of exposure holes 66 having a substantially oval cross section are formed, and the plurality of exposure holes 66 are arranged in two rows in the front-rear direction and spaced apart from one another at a plurality of locations in the circumferential direction of the core holding portion 64. The outer peripheral surface of the ferrite core 14 is exposed to the outside through these plurality of exposure holes 66.

[0058] In addition, in the portions of the core holding portion 64 that cover the left portion (38) and the right portion (40) of the ferrite core 14 from the outside in the left-right direction, two exposure holes 66, 66 each having a substantially oval shape in side view are formed so as to penetrate the core holding portion 64 in the left-right direction. In addition, in the portions of the core holding portion 64 that cover the upper portion 34 and the lower portion (36) of the ferrite core 14 from the outside in the up-down direction, two exposure holes 66, 66 each having a substantially oval shape in plan view are formed so as to penetrate the core holding portion 64 in the up-down direction. In addition, one exposure hole 66 is formed circumferentially 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 up-down direction.

[0059] In the connector 60 with a built-in ferrite core according to the second embodiment, as in the first embodiment, the amount of resin material forming the connector housing 62 can be reduced by miniaturizing the ferrite core 14, thereby reducing the stress acting on the ferrite core 14 due to shrinkage of the connector housing 62 after molding. In addition, in the second embodiment, a plurality of exposure holes 66 are provided in the peripheral wall of the core holding portion 64, which further reduces the amount of resin material of the core holding portion 64 provided on the outside of the ferrite core 14. As a result, the risk of damage to the ferrite core 14 due to shrinkage of the resin material or the like during molding of the core holding portion 64 can be further reduced.

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

[0061] <Embodiment 3> A ferrite core built-in connector 70 according to a third embodiment of the present disclosure will be described below with reference to Fig. 8. Similar to the ferrite core built-in connector 60 according to the second embodiment, the ferrite core built-in connector 70 according to the third embodiment has an exposure hole 76 that exposes the ferrite core 14 in the peripheral wall of the core holding portion 74 of the connector housing 72. This allows the ferrite core built-in connector 70 according to the third embodiment to achieve the same effects as the ferrite core built-in connector 60 according to the second embodiment.

[0062] While the exposure holes 66 in the second embodiment have a substantially oval cross section, the exposure holes 76 in the third embodiment have a substantially rectangular cross section. The exposure holes 66 in the second embodiment are arranged in two rows in the front-rear direction, but the exposure holes 76 in the third embodiment are arranged in a single row in the front-rear direction and are provided at multiple locations around the circumferential direction of the core holding portion 74. The cross-sectional area of ​​each exposure hole 76 in the third embodiment is larger than that of the exposure hole 66 in the second embodiment, and the sum of the cross-sectional areas of the multiple exposure holes 76 is larger than that of the multiple exposure holes 66 in the second embodiment. This reduces the amount of resin material in the peripheral wall of the core holding portion 74 compared to that of the core holding portion 64 in the second embodiment. As a result, the risk of damage to the ferrite core 14 due to shrinkage of the resin material during molding of the core holding portion 74 can be further reduced.

[0063] <Embodiment 4> A ferrite core built-in connector 80 according to a fourth embodiment of the present disclosure will now be described with reference to Figure 9. In the ferrite core built-in connector 80 according to the fourth embodiment, a connector housing 82 has a first resin part 84 that holds the terminal fitting 12 in an embedded state, and a second resin part 86 that holds the first resin part 84 and the ferrite core 14 in an embedded state.

[0064] The first resin portion 84 holds the intermediate portions 26a-26c of the first to third terminal fittings 12a-12c, the front and rear connecting portions (28a, 28a) of the first terminal fitting 12a, and the front and rear connecting portions (28c, 28c) of the third terminal fitting 12c in an embedded state. The first resin portion 84 covers the outer peripheries of the intermediate portions 26a-26c of the first to third terminal fittings 12a-12c, and fills the spaces between the opposing surfaces of the intermediate portions 26a-26c in the vertical direction.

[0065] The second resin portion 86 is molded 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 that covers the outer peripheral surface and both front and rear axial end faces of the ferrite core 14, and an inner peripheral filling portion 90 that fills the space between the opposing surfaces of the inner peripheral surface of the ferrite core 14 and 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. Because the first resin portion 84 and the second resin portion 86 are molded separately, they may also be made of different resin materials.

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

[0067] First, the first resin portion 84 is injection molded with the first to third terminal fittings 12a to 12c and the collars 54, 54 set in an injection molding die for the first resin portion 84. This forms a primary molded product 92 with the first to third terminal fittings 12a to 12c and the collars 54, 54 as insert parts.

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

[0069] The ferrite core 14 is set in the injection mold for the second resin part 86 with its inner circumferential surface separated from the primary molded product 92. This allows the ferrite core 14 to be positioned accurately in an appropriate position relative to the primary molded product 92. Then, an inner circumferential filling part 90 of the second resin part 86 is formed between the inner circumferential surface of the ferrite core 14 and the opposing surface of the primary molded product 92.

[0070] In this way, by separately molding the first resin portion 84 and the second resin portion 86 that constitute the connector housing 82, compared to when the entire connector housing is integrally molded, the amount of resin used when molding the secondary molded product 94 (second resin portion 86) that includes the ferrite core 14 as an insert part can be reduced by the amount of the first resin portion 84. Therefore, when the resin material of the second resin portion 86 hardens, the contraction force applied to the ferrite core 14 can be further reduced, making it possible to more effectively prevent damage to the ferrite core 14.

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

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

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

[0074] (2) For example, the plate width dimension of the intermediate portion of the terminal fitting may be the same as or larger than the plate width dimensions of the first and second connecting portions. Also, the terminal fitting does not necessarily have to be strip-shaped throughout as long as the intermediate portion is strip-shaped. For example, the first and second connecting portions may be rod-shaped, annular-shaped, U-shaped, or other shapes other than strip-shaped.

[0075] (3) In the above embodiment, the intermediate portions 26a-26c of the first to third terminal fittings 12a-12c are arranged to overlap each other entirely when projected in the up-down direction, but the intermediate portions of the multiple terminal fittings may partially overlap each other when projected in the up-down direction. Specifically, for example, the intermediate portion 26a of the first terminal fitting 12a in the above embodiment may be positioned shifted to the left with respect to the intermediate portion 26b of the second terminal fitting 12b, so that the right portion of the intermediate portion 26a overlaps with the intermediate portion 26b in the up-down direction and the left portion of the intermediate portion 26a does not overlap with the intermediate portion 26b in the up-down direction.

[0076] (4) In the above embodiment, the intermediate portion 26a of the first terminal fitting 12a and the intermediate portion 26c of the third terminal fitting 12c overlap the intermediate portion 26b of the second terminal fitting 12b so as to sandwich the intermediate portion 26a from both the upper and lower sides. However, for example, the intermediate portion 26b of the second terminal fitting 12b and the intermediate portion 26c of the third terminal fitting 12c may be arranged to overlap the intermediate portion 26a of the first terminal fitting 12a so as to sandwich the intermediate portion 26a from both the upper and lower sides. In this case, for example, the first terminal fitting 12a and the third terminal fitting 12c may be provided with stepped portions 30a, 30c that protrude in the same vertical direction from the intermediate portions 26a, 26c but have different protruding amounts, or the first terminal fitting 12a may not be provided with a stepped portion, but instead a stepped portion may be provided between the intermediate portion 26b and the first connecting portion 22b in the second terminal fitting 12b, thereby allowing the first connecting portions 22a to 22c to be positioned at the same height position relative to each other in the plate thickness direction.

[0077] (5) The first connecting portions are not limited to those arranged in parallel and spaced apart in the plate width direction, and may be arranged in the same position in the plate width direction and spaced apart in the plate thickness direction, for example. Therefore, there may be cases where not all terminal fittings are provided with connecting portions.

[0078] (6) When the first connection portions of a plurality of terminal fittings are arranged in parallel and spaced apart from each other in the plate width direction, the first connection portions do not necessarily have to be arranged at the same height relative to each other in the plate thickness direction. Therefore, even if at least one terminal fitting has a connecting portion, it is not essential that the connecting portion has a step portion.

[0079] (7) The exposure hole may be formed so as to penetrate the portion of the core holding part that covers the axial end face of the ferrite core, instead of or in addition to the portion of the core holding part that covers the outer peripheral surface of the ferrite core. Note that the penetration direction of the exposure hole that penetrates the core holding part is not particularly limited.

[0080] (8) In the second and third embodiments, the multiple exposure holes 66, 76 penetrating the outer wall of the core holding portion 48 of the connector housing 16 are illustrated. However, for example, the outer wall of the core holding portion may be eliminated, and the core holding portion may have a concave cross-section that opens toward the outer periphery and is formed by a wall that covers both axial ends and the inner periphery of the ferrite core. This also reduces the amount of resin material used to form the core holding portion, and more effectively prevents damage to the ferrite core due to post-molding shrinkage of the core holding portion. Furthermore, the portion of the core holding portion that covers the axial end faces of the ferrite core may be eliminated, and the core holding portion may have a concave cross-section that opens in the axial direction. [Explanation of symbols]

[0081] 10. Ferrite core built-in connector (embodiment 1) 12 Terminal fittings 12a First terminal fitting 12b Second terminal fitting 12c Third terminal fitting 14 Ferrite core 16 Connector housing 18 Front through hole 20 Rear through hole 22 (22a to 22c) First connection part 24(24a~24c) Second connection part 26(26a~26c) Middle part 28(28a,28c) Connection part 30(30a,30c) Stepped part 31 Gap 32 Interior Space 34 Upper part 36 Lower part 38 Left side 40 Right side 42 Upper ferrite core 44 Lower ferrite core 46 Terminal holding part 48 Core holder 50 Legs 52 Bolt insertion hole 54 Color 60 Ferrite core built-in connector (embodiment 2) 62 Connector housing 64 Core holding part 66 Exposure hole 70 Ferrite core built-in connector (embodiment 3) 72 Connector housing 74 Core holding part 76 Exposure hole 80 Ferrite core built-in connector (embodiment 4) 82 Connector housing 84 First resin part 86 Second resin part 88 External coating 90 Inner filling section 92 Primary molding products 94 Secondary molded products

Claims

1. a plurality of terminal fittings each having a first connecting portion and a second connecting portion connected together by a strip-shaped intermediate portion; a ferrite core disposed so as to collectively surround the periphery of the intermediate portions of the plurality of terminal fittings; a connector housing that accommodates portions of the plurality of terminal fittings excluding 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 fittings are arranged in a state in which they are spaced apart from each other in the plate thickness direction and overlap each other when projected in the plate thickness direction, The connector housing has a first resin portion that holds portions of the plurality of terminal fittings excluding the first connection portions and the second connection portions in an embedded state, and a second resin portion that is molded separately from the first resin portion and holds the first resin portion and the ferrite core in an embedded state. Connector with built-in ferrite core.

2. A plurality of terminal fittings in which a first connection portion and a second connection portion are connected by a strip-shaped intermediate portion; a ferrite core disposed so as to collectively surround the periphery of the intermediate portions of the plurality of terminal fittings; a connector housing that accommodates portions of the plurality of terminal fittings excluding 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 fittings are arranged in a state in which they are spaced apart from each other in the plate thickness direction and overlap each other when projected in the plate thickness direction, The connector housing includes an exposure hole for exposing the ferrite core.

3. At least one of the plurality of terminal fittings has a connecting portion extending from an end of the intermediate portion on the side of the first connection portion in a plate width direction of the intermediate portion, and the first connection portion connected to the intermediate portion by the connecting portion is disposed at a position shifted from an extension of the connecting portion in the plate width direction, A connector with a built-in ferrite core as described in claim 1 or claim 2, wherein the first connection portions of the multiple terminal fittings overlapping in the plate thickness direction at the intermediate portion are arranged in parallel with gaps between them in the plate width direction by the connecting portion.

4. At least one of the terminal fittings having the connecting portion has a stepped portion at the connecting portion that is bent in a crank shape in the plate thickness direction, and the intermediate portion and the first connecting portion provided on both sides of the stepped portion are disposed at height positions that are offset from each other in the plate thickness direction, The connector with a built-in ferrite core according to claim 3, wherein the first connection portions of the plurality of terminal fittings overlapping in the thickness direction in the intermediate portion are positioned at the same height position in the thickness direction by the stepped portion.

5. 3. The connector with a built-in ferrite core according to claim 1, wherein the connector housing is made of a resin material having higher heat resistance than PVC.

6. The connector housing has a terminal holding portion that holds the portions of the multiple terminal fittings excluding the first connection portion and the second connection portion in an embedded state, and a core holding portion that is integrally molded with the terminal holding portion and holds the ferrite core in an embedded state.

7. 3. A ferrite core-embedded connector as described in claim 1 or claim 2, wherein the first connection portion and the second connection portion of each terminal fitting protrude and are exposed from the connector housing on both axial sides of the cylindrical ferrite core.

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