Terminal unit

Abstract

To prevent short circuits between a pair of terminal fittings.SOLUTION: A terminal unit includes a wire 70 in the form of a pair of core wires 71 made of sheathed wire and surrounded by a sheath 73, a pair of terminal fittings 80 connected to a front end of a conductive part 76 of the pair of core wires 71 that is led forward from the sheath 73, and an impedance adjusting member 90 having electrical conductivity, which is assembled to the conductive part 76 of the pair of core wires 71. The impedance adjusting member 90 has an insulating part 92 that insulates between the pair of terminal fittings 80.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present disclosure relates to a terminal unit. [Background technology]

[0002] The terminal module disclosed in Patent Document 1 includes a shielded electric wire having a covered electric wire and a sheath portion that covers the covered electric wire. A terminal is connected to the front end of the covered electric wire. The end of the covered electric wire on the terminal side is an exposed portion that is exposed from the sheath. The exposed portion is covered with a conductive impedance adjustment member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2021-106168 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the configuration of Patent Document 1, since the terminal fittings are connected to the front ends of the exposed portions, there is a concern that a short circuit may occur between the pair of terminal fittings via the impedance adjustment member when the impedance adjustment member and the terminal fittings are in close proximity to each other, which may cause an interruption in transmission. The connector of the present disclosure has been completed based on the above circumstances, and has an object to suppress a short circuit between a pair of terminal fittings. [Means for solving the problem]

[0005] The terminal unit of the present disclosure comprises: An electric wire in which a pair of core wires made of coated electric wires are surrounded by a sheath; a pair of terminal fittings connected to front ends of lead-out portions of the pair of core wires led forward from the sheath; an impedance adjustment member having electrical conductivity and attached to the lead-out portions of the pair of core wires; Equipped with The impedance adjusting member has an insulating portion that provides insulation between the pair of terminal fittings. Effect of the Invention

[0006] According to the present disclosure, short circuits between a pair of terminal fittings can be suppressed. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view of a connector according to a first embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of a module that constitutes the connector shown in FIG. [Diagram 3] FIG. 3 is an exploded perspective view of a terminal unit that constitutes the module shown in FIG. [Figure 4] 4 is a cross-sectional view of a pair of core wires and an impedance adjustment member, taken along a cross section perpendicular to the front-rear direction in the module shown in FIG. 2, as viewed from the front side. [Diagram 5] FIG. 5 is a side cross-sectional view showing a cross section of members other than the module in the connector of FIG. [Figure 6] FIG. 6 is a partially enlarged view of FIG. [Figure 7] FIG. 7 is a partially enlarged view showing the lead-out portion and the impedance adjusting member in cross section in FIG. [Figure 8] FIG. 8 is a perspective view of an impedance adjusting member constituting the connector of the second embodiment. [Figure 9] FIG. 9 is a view of the connector of the second embodiment, which corresponds to FIG. [Figure 10] FIG. 10 is a view of the connector of the third embodiment, which corresponds to FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. The terminal unit of the present disclosure comprises: (1) An electric wire in which a pair of core wires made of coated electric wires are surrounded by a sheath; a pair of terminal fittings connected to front ends of lead-out portions of the pair of core wires led forward from the sheath; an impedance adjustment member having electrical conductivity and attached to the lead-out portions of the pair of core wires; Equipped with The impedance adjusting member has an insulating portion that provides insulation between the pair of terminal fittings. According to the configuration of the present disclosure, an impedance adjustment member having electrical conductivity is attached to a lead-out portion of a pair of core wires that is led forward from a sheath. This configuration can suppress a change in impedance between a portion of the pair of core wires that is surrounded by the sheath and the lead-out portion. In addition, since the impedance adjustment member has an insulating portion that insulates between the pair of terminal fittings, the insulating portion can suppress a short circuit between the pair of terminal fittings.

[0009] (2) In (1), it is preferable that the impedance adjustment member has a conductive portion having electrical conductivity, and the insulating portion is a coating that entirely covers the conductive portion. With this configuration, the conductive portion is covered by the insulating portion and is not exposed, so that a short circuit between the terminal fitting and the conductive portion can be more effectively suppressed.

[0010] (3) In (1), it is preferable that the impedance adjustment member has a conductive portion having electrical conductivity, and the insulating portion is a coating that covers only a front end portion of the conductive portion. With this configuration, the insulating portion is interposed between the conductive portion and the terminal fitting, and a short circuit between the conductive portion and the terminal fitting can be suppressed. Furthermore, since the insulating portion covers only the front end portion of the conductive portion, the material of the insulating portion can be reduced, and a short circuit between the conductive portion and the terminal fitting can be efficiently suppressed.

[0011] (4) In any one of (1) to (3), the impedance adjustment member preferably has a conductive part having electrical conductivity, the conductive part contains a conductive resin, and the impedance adjustment member is a two-color molded body constituted by the conductive part and the insulating part containing an elastomer. With this configuration, a process of assembling the conductive part and the insulating part can be omitted when manufacturing the impedance adjustment member.

[0012] [Details of the embodiment of the present disclosure] [Example 1] A first embodiment of the present disclosure will be described with reference to Figs. 1 to 7. In this first embodiment, with regard to the front-rear direction, the F direction in Fig. 1 is defined as the front. The front is the direction in which the connector 10 fits into a mating connector (not shown). With regard to the up-down direction, the H direction in Fig. 1 is defined as the upward direction. With regard to the left-right direction, the R direction in Fig. 1 is defined as the rightward direction.

[0013] A connector 10 according to the first embodiment is shown in Fig. 1. The connector 10 includes a module 11 and a housing 20. The connector 10 is fitted into a mating connector (not shown).

[0014] The housing 20 is made of, for example, synthetic resin. As shown in FIG. 1, the housing 20 has a module accommodating section 21 penetrating in the front-rear direction. The module accommodating section 21 accommodates the module 11. As shown in FIG. 5, a lance 22 is formed on the upper surface of the rear inner wall of the module accommodating section 21 so as to protrude forward. The lance 22 is elastically deformable in the up-down direction. As shown in FIG. 1, a lock arm 23 is formed on the upper wall of the housing 20.

[0015] As shown in Fig. 2, the module 11 has a terminal unit 30, a dielectric 40, an outer conductor 50, and an outer conductor cover 60. As shown in Fig. 3, the terminal unit 30 has an electric wire 70, a terminal fitting 80, and an impedance adjusting member 90.

[0016] (Electric wire) The electric wire 70 transmits a communication signal. As shown in FIG. 3, the electric wire 70 has a pair of core wires 71, a shield body 72, and a sheath 73. The pair of core wires 71 are twisted together to form a twisted pair wire. The front ends (lead-out portions 76 described later) of the pair of core wires 71 are untwisted and extend straight in parallel to each other. The core wire 71 is made of a coated electric wire, and includes a conductive core wire 75 surrounded by an insulating coating 74. The shield body 72 is configured as a braided wire or the like that collectively covers the outer periphery of the pair of core wires 71. The sheath 73 surrounds the pair of core wires 71 and the shield body 72.

[0017] At the end of the electric wire 70, the sheath 73 is removed to expose the pair of core wires 71. The end of the shield body 72 is folded back from the end of the sheath 73 and exposed on the outer periphery of the sheath 73.

[0018] The core wire 71 has a lead-out portion 76 that is led out forward from the front end of the sheath 73 (the folded-back portion of the shield body 72). The lead-out portion 76 is exposed to the outside. The lead-out portion 76 includes a core wire lead-out portion 77 and a coating lead-out portion 78. The core wire lead-out portion 77 is made of the core wire 75 that is exposed by removing the insulating coating 74 at the front end. The coating lead-out portion 78 is the portion where the insulating coating 74 is exposed between the core wire lead-out portion 77 and the front end of the sheath 73.

[0019] (Terminal fittings) As shown in Figs. 2 and 3, two terminal fittings 80 are provided in the connector 10 corresponding to the two core wires 71. The terminal fittings 80 are formed by bending a conductive metal plate or the like. As shown in Fig. 3, the terminal fittings 80 are female terminals and have a terminal connection portion 81, a wire barrel 82, and an insulation barrel 83. The terminal connection portion 81 is in the shape of a rectangular tube. The terminal connection portion 81 is electrically connected to a mating terminal fitting (not shown) of a mating connector when the connector 10 is fitted to the mating connector (not shown).

[0020] The terminal fitting 80 has a strip-shaped base 84 (see FIG. 5) extending over the entire length in the front-rear direction. As shown in FIG. 3, the wire barrel 82 has a pair of wire barrel pieces 85 rising from both the left and right sides of the front-rear middle part of the base 84. Each wire barrel piece 85 has a rectangular plate shape that is long in the front-rear direction. Each wire barrel piece 85 is wound around the core wire lead-out part 77 of the core wire 71. As a result, the wire barrel 82 is crimped to the core wire lead-out part 77 and electrically connected. Specifically, each wire barrel piece 85 is deformed along the outer peripheral surface of the core wire lead-out part 77 and butts together at the left-right center part. For convenience, the wire barrel 82 shown in FIG. 3 shows a shape after deformation in which the wire barrel 82 is crimped to the core wire lead-out part 77. To be precise, the wire barrel 82 is formed in an open barrel shape before deformation.

[0021] The insulation barrel 83 has a pair of insulation barrel pieces 86 rising from both the left and right sides of the rear end of the base 84 (see FIG. 5). Each insulation barrel piece 86 is in the form of a plate piece with a larger rising dimension than the wire barrel piece 85. Each insulation barrel piece 86 is wound around the front end of the coating lead-out portion 78 of the core wire 71. The insulation barrel 83 is mechanically connected to the coating lead-out portion 78 by being crimped. Specifically, each insulation barrel piece 86 is deformed along the outer circumferential surface of the insulating coating 74 constituting the coating lead-out portion 78, and is arranged with a positional deviation such that the tip end overlaps in the front-rear direction. For convenience, the insulation barrel 83 shown in FIG. 3 shows the shape after deformation in which it is crimped to the coating lead-out portion 78. To be precise, the insulation barrel 83 is formed in an open barrel shape before deformation.

[0022] (Dielectric) 2, the dielectric 40 is made of an insulating synthetic resin material and is formed into a rectangular parallelepiped shape that is long in the front-rear direction. The dielectric 40 is formed by combining a lower member 41 and an upper member 42 with each other in the up-down direction. The two terminal fittings 80 are connected to the core wire 71 and are housed side by side in the left-right direction within the dielectric 40.

[0023] (Outer conductor) The outer conductor 50 is formed by bending a conductive metal plate, etc. As shown in Fig. 2, the outer conductor 50 includes a fitting tube portion 51 having a rectangular tube shape that is long in the front-rear direction, and a shield connection portion 52 that is connected to a shield body 72 of the electric wire 70.

[0024] The dielectric 40 is inserted from the rear and accommodated in the fitting tubular portion 51. When the dielectric 40 is accommodated in the fitting tubular portion 51, the terminal fitting 80 is electrically insulated from the fitting tubular portion 51 by the dielectric 40. The fitting tubular portion 51 is formed with an elastic contact portion 53 that is elastically deformable and comes into contact with a mating outer conductor (not shown) of a mating connector (not shown).

[0025] The shield connecting portion 52 has a plate shape extending rearward from the lower edge of the rear end of the fitting tubular portion 51. As shown in Fig. 5, the shield connecting portion 52 is disposed below the shield body 72 and is connected to the shield body 72 by receiving the crimping force of the outer conductor cover 60.

[0026] (Outer conductor cover) The outer conductor cover 60 is formed by bending a conductive metal plate, etc. As shown in Fig. 5, the rear part of the fitting tube part 51 is disposed inside the front part of the outer conductor cover 60. As shown in Fig. 2, a square opening hole 61 and a housing locking part 62 protruding upward from the front edge of the opening hole 61 are formed in the upper wall of the front part of the outer conductor cover 60.

[0027] A shield barrel portion 63 is formed at the rear of the outer conductor cover 60. As shown in Fig. 5, the shield barrel portion 63 is connected by crimping to the shield body 72 of the electric wire 70 while arranging the shield connection portion 52 of the outer conductor 50 inside. For convenience, the shield barrel portion 63 shown in Fig. 2 shows the shape after deformation in which it is crimped to the shield body 72 of the electric wire 70. To be precise, the shield barrel portion 63 is formed in an open barrel shape before deformation.

[0028] As shown in FIG. 5, the lance 22 of the housing 20 fits into the opening 61 and is locked by the housing locking portion 62, so that the module 11 is prevented from coming out of the module accommodating portion .

[0029] (Impedance adjustment material) The impedance adjustment member 90 is conductive and is attached to the lead-out portions 76 of the pair of core wires 71 as shown in Fig. 2. The impedance adjustment member 90 has a conductive portion 91 and an insulating portion 92 as shown in Figs. 4 and 7. The conductive portion 91 is formed by bending a conductive metal plate or the like. As shown in Fig. 4, the conductive portion 91 includes a pair of adjustment main body portions 93 attached to the insulating coating 74 constituting the coating lead-out portion 78 of the core wire 71, and a connecting portion 94 connecting the pair of adjustment main body portions 93.

[0030] The adjustment main body portion 93 has a cylindrical shape with a C-shaped cross section that circumferentially covers the outer peripheral surface of the insulating coating 74 of the coating lead-out portion 78 closer to the sheath 73. The length of the adjustment main body portion 93 in the front-rear direction is shorter than the length of the coating lead-out portion 78 in the front-rear direction.

[0031] 4, the connecting portion 94 has a curved shape that bulges upward, and connects the pair of adjustment main body portions 93 in the left-right direction. The connecting portion 94 is formed so that the front portion is wider in the left-right direction than the rear portion. Therefore, the impedance adjustment member 90 has a front portion that is wider in the left-right direction than the rear portion.

[0032] The insulating portion 92 provides insulation between the pair of terminal fittings 80. The insulating portion 92 is a coating that covers the entire surface of the conductive portion 91. The insulating portion 92 is formed, for example, by immersing a member that is the base of the conductive portion 91 in a solution of a material that will become the insulating portion 92. The insulating portion 92 may also be formed by attaching the material that will become the insulating portion 92 to the surface of the member that is the base of the conductive portion 91 by spray painting. The insulating portion 92 is curved along the curved shape of the conductive portion 91. The insulating portion 92 is formed, for example, from a resin material having insulating properties (a material similar to the resist used in printed circuit boards).

[0033] The insulating portion 92 covers the adjustment main body portion 93 and the connecting portion 94. Specifically, the insulating portion 92 covers an inner surface 95 of the conductive portion 91. The inner surface 95 of the conductive portion 91 is a surface of the conductive portion 91 that faces an outer surface of the coating lead-out portion 78. The insulating portion 92 covers an outer surface 96 of the conductive portion 91. The outer surface 96 of the conductive portion 91 is the surface opposite to the inner surface 95.

[0034] As shown in Fig. 7, the insulating portion 92 covers a front end surface 97 of the conductive portion 91. The front end surface 97 of the conductive portion 91 is a surface facing a rear end surface of the insulation barrel 83 of the terminal fitting 80. The insulating portion 92 covers a rear end surface 98 of the conductive portion 91. The rear end surface 98 of the conductive portion 91 is a surface facing a folded portion (front end portion of the sheath 73) of the shield body 72 (see Figs. 3 and 5).

[0035] (Effects of the connector of the first embodiment) In the connector 10 of the first embodiment, an impedance adjusting member 90 having electrical conductivity is attached to the lead-out portion 76 of the pair of core wires 71, which is led forward from the sheath 73. This configuration makes it possible to suppress a change in impedance between the lead-out portion 76 and the portion of the pair of core wires 71 surrounded by the sheath 73. Furthermore, since the impedance adjusting member 90 has an insulating portion 92 that insulates between the pair of terminal fittings 80, the insulating portion 92 can suppress a short circuit between the pair of terminal fittings 80.

[0036] Furthermore, since the insulating portion 92 of the impedance adjustment member 90 can suppress short circuits between the pair of terminal fittings 80, the impedance adjustment member 90 can be attached to the lead-out portion 76 in a state close to the terminal fittings 80 while maintaining high transmission performance of the pair of core wires 71. This makes it possible to further shorten the untwisted length of the pair of core wires 71 and the exposed length of the core wire 75 from the insulating coating 74.

[0037] In the connector 10 of the first embodiment, the impedance adjusting member 90 has a conductive portion 91 having electrical conductivity. The insulating portion 92 is a coating that covers the entire conductive portion 91. With this configuration, the conductive portion 91 is covered by the insulating portion 92 and is not exposed, so that a short circuit between the terminal fitting 80 and the conductive portion 91 can be more effectively suppressed.

[0038] [Example 2] The connector 210 of the second embodiment has a different configuration of the impedance adjusting member from that of the first embodiment, but is otherwise common to both embodiments. The same configurations as those of the first embodiment are given the same reference numerals, and detailed description thereof will be omitted.

[0039] (Impedance adjustment material) The connector 210 of the second embodiment includes an impedance adjusting member 290 shown in Fig. 8. The impedance adjusting member 290 has a conductive portion 91 and an insulating portion 292. The insulating portion 292 provides insulation between the pair of terminal fittings 80. The insulating portion 292 is a coating that covers only a front end portion 299 of the conductive portion 91. The insulating portion 292 is curved in the left-right direction along the curved shape of the conductive portion 91. The insulating portion 292 is formed, for example, from a resin material having insulating properties (a material similar to the resist used in printed circuit boards).

[0040] The insulating portion 292 covers a front end portion of the adjustment main body portion 93 and a front end portion of the connecting portion 94 (see FIG. 4). Specifically, the insulating portion 292 covers a front end portion of the inner surface 95 of the conductive portion 91. The insulating portion 292 covers a front end portion of the outer surface 96 of the conductive portion 91.

[0041] 9, the insulating portion 292 covers a front end surface 97 of the conductive portion 91. The front end surface 97 of the conductive portion 91 is a surface facing a rear end surface of the insulation barrel 83 of the terminal fitting 80.

[0042] (Effects of the connector of the second embodiment) In the connector 210 of the second embodiment, the insulating portion 292 of the impedance adjustment member 290 is a coating that covers only the front end portion 299 of the conductive portion 91. With this configuration, the insulating portion 292 covers the front end portion 299 of the conductive portion 91, and therefore the insulating portion 292 is interposed between the conductive portion 91 and the terminal fitting 80, making it possible to suppress a short circuit between the conductive portion 91 and the terminal fitting 80. In addition, since the insulating portion 292 covers only the front end portion 299 of the conductive portion 91, the material of the insulating portion 292 can be reduced, making it possible to efficiently suppress a short circuit between the conductive portion 91 and the terminal fitting 80.

[0043] [Other Examples] The present invention is not limited to the embodiments described above and shown in the drawings, but is indicated by the claims. The present invention includes the equivalent meaning of the claims and all modifications within the scope of the claims, including the following embodiments.

[0044] In the connector 10 of the first embodiment, the impedance adjustment member 90 is curved plate-shaped, but is not limited thereto as long as it is configured to be attached to the core wire 71 (coating lead-out portion 78). For example, the impedance adjustment member 390 shown in FIG. 10 may be configured as such. The impedance adjustment member 390 has a conductive portion 391 and an insulating portion 392. The conductive portion 391 has a pair of adjustment main bodies 393 that are C-shaped in cross section, and a connecting portion 394 that connects the pair of adjustment main bodies 393. The connecting portion 394 connects the pair of adjustment main bodies 393 back to back (with the openings facing both the left and right sides). The insulating portion 392 covers the entire conductive portion 391.

[0045] The impedance adjustment member 90 of the first embodiment has a conductive portion 91 made of metal and an insulating portion 92 made of insulating resin, but may be a two-color molded body composed of a conductive portion containing a conductive resin and an insulating portion containing an elastomer. In this configuration, the process of assembling the conductive portion and the insulating portion can be omitted when manufacturing the impedance adjustment member. The shapes of the conductive portion and the insulating portion can be the same as those of the first and second embodiments.

[0046] In the impedance adjustment member 90 of Example 1, the insulating portion 92 covers the entire conductive portion 91, but it is not necessary to cover the entire conductive portion 91 as long as it covers the front end face 97 of the conductive portion 91. For example, the insulating portion 92 may be configured to cover only one of the inner surface 95 and the outer surface 96 of the conductive portion 91, as well as the front end face 97 of the conductive portion 91. The same applies to the impedance adjustment member 290 of Example 2.

[0047] In the impedance adjustment member 90 of Example 1 described above, the insulating portion 92 covers the entire front end surface 97 of the conductive portion 91, but it may also cover only the front ends of a pair of adjustment main body portions 93 or only the front end of one of the adjustment main body portions 93.

[0048] In the impedance adjustment member 90 of the first embodiment, the conductive portion 91 is made of a single component, but it may be made of a plurality of components assembled together. [Explanation of symbols]

[0049] 10: Connector 11: Modules 20: Housing 21: Module housing 22: Lance 23: Lock Arm 30: Terminal unit 40: Dielectric 41: Lower member 42: Upper part 50: Outer conductor 51: Fitting cylinder part 52: Shield connection 53: Elastic contact part 60: Outer conductor cover 61: Opening hole 62: Housing locking part 63: Shield barrel part 70: Electric wire 71: Core wire 72: Shield Body 73: Sheath 74: Insulation coating 75: Core wire 76: Derivation part 77: Core lead-out section 78: Covering lead-out part 80: Terminal fittings 81: Terminal connection 82: Wire barrel 83: Insulation Barrel 84: Base 85: Wire barrel piece 86: Insulation barrel piece 90: Impedance adjustment material 91: Conductive part 92: Insulation 93: Adjustment body 94: Connection part 95: Inside 96: Exterior 97: Front end surface 98: Rear end surface 210: Connector 290: Impedance adjustment material 292: Insulation 299: Front end 390: Impedance adjustment material 391: Conductive part 392: Insulation 393: Adjustment body 394: Connecting part

Claims

1. an electric wire in which a pair of core wires made of coated electric wires are surrounded by a sheath; a pair of terminal fittings connected to front ends of lead-out portions of the pair of core wires led forward from the sheath; an impedance adjustment member having conductivity and attached to the lead-out portion of the pair of core wires; Equipped with The impedance adjusting member is a terminal unit having an insulating portion that insulates the pair of terminal fittings from each other.

2. the impedance adjustment member has a conductive portion having conductivity, The terminal unit according to claim 1 , wherein the insulating portion is a coating that covers the entire conductive portion.

3. the impedance adjustment member has a conductive portion having conductivity, 2. The terminal unit according to claim 1, wherein the insulating portion is a coating that covers only the front end portion of the conductive portion.

4. the impedance adjustment member has a conductive portion having conductivity, the conductive portion includes a conductive resin, 4. The terminal unit according to claim 1, wherein the impedance adjusting member is a two-color molded body composed of the conductive portion and the insulating portion containing an elastomer.

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