Terminal module

Abstract

To improve impedance matching without requiring high assembly precision.SOLUTION: A terminal module A includes a shielded electric wire 11 having a pair of core wires 12 inserted into a cylindrical shielding member 15 surrounded by a sheath 18, a pair of terminal fittings 25 fixed to front ends of lead-out portions 22 of the pair of core wires 12 that are led out forward of the sheath 18, a clip 40 for adjusting impedance fixed to the pair of lead-out portions 22, and a conductive member 21 surrounding the area of the pair of lead-out portions 22 between a rear end 40R of the clip 40 and a front end 18F of the sheath 18.SELECTED DRAWING: Figure 3

Description

[Technical field]

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

[0002] Patent Document 1 discloses a terminal module including a shielded electric wire in which a coated electric wire is covered with a shield part and the shield part is covered with a sheath, a terminal fitting connected to a front end part of the coated electric wire, and an impedance adjustment member. The impedance adjustment member covers an exposed part of the coated electric wire that is exposed forward from the shield part and the sheath, thereby achieving impedance matching. [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 order to improve impedance matching, it is preferable to shorten the length of the non-adjusted region between the impedance adjustment member and the shielding portion by bringing the rear end of the impedance adjustment member close to the front end of the shielding portion when attaching the impedance adjustment member to the insulated electric wire. However, attaching the impedance adjustment member close to the shielding portion requires high assembly precision.

[0005] The terminal module of the present disclosure has been completed based on the above circumstances, and has an object to improve impedance matching without requiring a high degree of assembly precision. [Means for solving the problem]

[0006] The terminal module of the present disclosure comprises: a shielded electric wire in which a pair of core wires are inserted into a cylindrical shielding member surrounded by a sheath; a pair of terminal fittings fixed to front end portions of the pair of core wires led forward from the sheath; A pair of impedance adjusting clips fixed to the lead-out portions; The clip includes a conductive member that surrounds a region of the pair of lead-out portions between the rear end of the clip and the front end of the sheath. Effect of the Invention

[0007] According to the present disclosure, impedance matching can be improved without requiring high assembly precision. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a terminal module according to a first embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of the terminal module shown in FIG. [Diagram 3] FIG. 3 is a plan sectional view of the terminal module shown in FIG. [Figure 4] 4 is a partially enlarged cross-sectional plan view of a conductive path with terminals that constitutes the terminal module shown in FIG. [Diagram 5] FIG. 5 is a partially enlarged cross-sectional plan view of a conductive path with terminals that constitutes the terminal module of the second embodiment. [Figure 6] FIG. 6 is a partially enlarged cross-sectional plan view of a conductive path with terminals that constitutes the terminal module of the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. Any combination of the following embodiments without causing any contradiction is also included in the embodiment for carrying out the present invention. The terminal module of the present disclosure comprises: (1) A shielded electric wire includes a pair of core wires inserted into a cylindrical shielding member surrounded by a sheath, a pair of terminal fittings fixed to front ends of lead-out portions of the pair of core wires led forward of the sheath, a clip for impedance adjustment fixed to the pair of lead-out portions, and a conductive member surrounding an area of ​​the pair of lead-out portions between a rear end of the clip and a front end of the sheath. According to the configuration of the present disclosure, the area of ​​the lead-out portion of the core wire between the rear end of the clip and the front end of the sheath is surrounded by the conductive member, so that impedance matching can be improved without requiring high assembly accuracy.

[0010] (2) In (1), it is preferable that the conductive member is configured by an extension portion of the cylindrical shielding member that extends forward beyond the sheath. With this configuration, the cylindrical shielding member that constitutes the shielded electric wire is reused, so that the number of parts can be reduced compared to the case where a dedicated part separate from the shielded electric wire is used.

[0011] (3) In (2), it is preferable that the front end of the cylindrical shielding member is crimped to the core wire by the clip. With this configuration, there is no risk of the cylindrical shielding member being displaced rearward relative to the core wire, and therefore the core wire can be prevented from being exposed between the front end of the cylindrical shielding member and the terminal fitting.

[0012] In the above-mentioned configuration (4) (2), it is preferable that a conductive adhesive tape is wrapped around an outer surface of the clip and an outer surface of the cylindrical shielding member. With this configuration, the positional deviation of the cylindrical shielding member with respect to the clip can be suppressed by the adhesive force of the conductive adhesive tape.

[0013] (5) In any of (1) to (4), it is preferable that the cylindrical shielding member is composed of a shielding foil surrounding the pair of core wires and a braided wire surrounding the shielding foil, the braided wire is connected to an outer conductor surrounding the terminal fitting, and the shielding foil functions as the conductive member. With this configuration, it is possible to achieve both a connection structure between the outer conductor and the cylindrical shielding member and a structure in which the core wire is surrounded by the cylindrical shielding member.

[0014] (6) In (1), the conductive member is preferably a conductive adhesive tape attached to the outer surface of the core wire. With this configuration, the weight can be reduced compared to when the conductive member is a thick metal plate.

[0015] In the above configurations (7) and (6), it is preferable that the front end of the conductive adhesive tape is crimped to the core wire by the clip. With this configuration, it is possible to prevent the conductive adhesive tape from shifting in position relative to the core wire.

[0016] In (8)(1), it is preferable that a front end of the conductive member is attached to a surface of the clip facing the core wire. With this configuration, the step of attaching the clip to the core wire and the step of attaching the conductive member to the core wire can be performed in a single step.

[0017] In the above configurations (9) and (8), it is preferable that the conductive member is made of a conductive adhesive tape, and the conductive adhesive tape is attached to the core wire. With this configuration, the area of ​​the lead-out portion of the core wire behind the clip can be reliably surrounded by the conductive member.

[0018] [Details of the embodiment of the present disclosure] [Example 1] A terminal module A according to a first embodiment of the present disclosure will be described with reference to Figs. 1 to 4. The present invention is not limited to these examples, but is defined by the claims, and includes all modifications within the meaning and scope equivalent to the claims. In this first embodiment, with regard to the front-rear direction, the F direction in Figs. 1 to 4 is defined as the front. With regard to the up-down direction, the H direction in Figs. 1 and 2 is defined as the up. With regard to the left-right direction, the R direction in Figs. 1 to 4 is defined as the right.

[0019] The terminal module A of the present embodiment 1 is used in a circuit for high-speed communication, and is configured to adjust the characteristic impedance to achieve impedance matching. The terminal module A includes a conductive path 10 with a terminal, a dielectric 30, and an outer conductor 35.

[0020] The terminal-equipped conductive path 10 includes a shielded electric wire 11, a pair of left and right terminal fittings 25 functioning as inner conductors, a clip 40 for impedance matching, and a conductive member 21. As shown in Figs. 2 to 4, the shielded electric wire 11 includes two core wires 12, a cylindrical shielding member 15, and a sheath 18. The core wires 12 are covered electric wires in which a core wire 13 is surrounded by an insulating covering 14. The cylindrical shielding member 15 is composed of a cylindrical shielding foil 16 made of a metal sheet material, and a braided wire 17 made of thin metal wires braided in a net shape. The sheath 18 is a cylindrical member made of synthetic resin. The two core wires 12 are inserted into the shielding foil 16. The shielding foil 16 is accommodated in an accommodation space 19 formed in the sheath 18. The braided wire 17 is embedded concentrically inside the sheath 18 and surrounds the shielding foil 16.

[0021] As shown in Figs. 3 and 4, at the front end of the shielded electric wire 11, the front end of the braided wire 17 exposed from the front end 18F of the sheath 18 is folded back to cover the outer circumferential surface of the sheath 18. The front end of the shield foil 16 extends forward from the front end 18F of the sheath 18. The extension portion 20 of the shield foil 16 exposed forward from the front end 18F of the sheath 18 functions as a conductive member 21 for impedance matching. The two core wires 12 are exposed forward from the sheath 18. The portion of the core wire 12 extending forward from the front end 18F of the sheath 18 is defined as the lead-out portion 22. The front end side region of the two core wires 12 (lead-out portion 22) extends forward from the front end of the shield foil 16 (conductive member 21). At the front end of the lead-out portion 22, the insulating coating 14 is removed to expose the core wire 13.

[0022] 2 and 3, the terminal fitting 25 is a female terminal that is elongated in the front-rear direction. The terminal fitting 25 has a rectangular cylindrical terminal body portion 26, a wire barrel portion 27 that extends rearward from the rear end of the terminal body portion 26, and an insulation barrel portion 28 that extends rearward from the rear end of the hose band. The pair of terminal fittings 25 are fixed to the front ends of the two lead-out portions 22. In detail, the wire barrel portion 27 is crimped to the core wire 13, and the insulation barrel portion 28 is crimped to the front end of the insulating coating 14.

[0023] As shown in FIG. 2, the dielectric 30 is formed by combining an upper member 31 and a lower member 32 vertically. A pair of left and right terminal accommodating chambers 33 are formed inside the dielectric 30. A pair of terminal fittings 25 are individually accommodated in the pair of terminal accommodating chambers 33. The outer conductor 35 is formed by combining a front member 36 and a rear member 37. The front member 36 surrounds the dielectric 30 and the pair of terminal fittings 25. The rear member 37 is attached to the rear end of the front member 36. A cylindrical crimping portion 38 formed at the rear end of the rear member 37 is crimped to the folded portion 23 of the braided wire 17 so as to be conductive.

[0024] Next, a structure for adjusting impedance will be described. In order to adjust impedance, a clip 40 and the conductive member 21 described above are attached to the lead-out portions 22 of the pair of core wires 12. The clip 40 is a single component made of, for example, a metal plate. The clip 40 has a pair of left and right holding portions 41 each having a major arc shape, and a connecting portion 42 connecting the two holding portions 41. The pair of holding portions 41 are crimped so as to wrap around the two lead-out portions 22. The holding portion 41 surrounds the outer circumferential surface of the lead-out portion 22 over more than half the circumference.

[0025] The range in which clip 40 surrounds lead-out portion 22 in the axial direction (front-rear direction) of core wire 12 is an area extending from a position slightly behind the rear end of insulation barrel portion 28 to a position slightly forward of front end 18F of sheath 18. Since clip 40 is fixed to an area forward of front end 18F of sheath 18, the rear end of clip 40 does not interfere with sheath 18 or braided wire 17.

[0026] The two lead-out portions 22 are entirely surrounded by the conductive member 21 from the rear end 40R of the clip 40 to the front end 18F of the sheath 18. As described above, the conductive member 21 is a portion of the shield foil 16 constituting the shielded electric wire 11 that is exposed forward of the front end 18F of the sheath 18. The front end of the conductive member 21 is sandwiched between the two pieces of core wire 12 (lead-out portions 22) and the clip 40. The front end of the conductive member 21 is crimped by the holding portion 41 of the clip 40 in a state in which it surrounds the lead-out portions 22. The conductive member 21 and the clip 40 are in contact to be conductive.

[0027] Furthermore, the clip 40 and the area of ​​the conductive member 21 between the rear end 40R of the clip 40 and the front end 18F of the sheath 18 are surrounded by a conductive adhesive tape 45. The conductive adhesive tape 45 is, for example, a thin metal sheet with an adhesive or a pressure sensitive adhesive (not shown) applied to one side thereof. The conductive adhesive tape 45 is wound around the clip 40 after it is crimped to the conductive member 21 and the core wire 12.

[0028] The terminal module A of the first embodiment includes a shielded electric wire 11, a pair of terminal fittings 25, a clip 40, and a conductive member 21. The shielded electric wire 11 is formed by inserting a pair of core wires 12 into a cylindrical shielding member 15 surrounded by a sheath 18. The pair of terminal fittings 25 are fixed to the front end of the lead-out portion 22 of the pair of core wires 12 that is led forward of the sheath 18. The clip 40 is a member fixed to the pair of lead-out portions 22, and has a function of adjusting the characteristic impedance. The conductive member 21 surrounds the region of the pair of lead-out portions 22 between the rear end 40R of the clip 40 and the front end 18F of the sheath 18.

[0029] According to the terminal module A of the present embodiment 1, the area of ​​the lead-out portion 22 of the core wire 12 between the rear end 40R of the clip 40 and the front end 18F of the sheath 18 is surrounded by the conductive member 21, so that when the clip 40 is fixed to the lead-out portion 22, it is not necessary to position the rear end 40R of the clip 40 with high precision relative to the front end 18F of the sheath 18. Therefore, according to the terminal module A of the present embodiment 1, it is possible to improve impedance matching without requiring high assembly precision when fixing the clip 40.

[0030] The conductive member 21 is configured by an extension portion 20 of the cylindrical shielding member 15 (shielding foil 16) that extends forward beyond the sheath 18. With this configuration, the cylindrical shielding member 15 that constitutes the shielded electric wire 11 is reused, so that the number of parts can be reduced compared to the case where a dedicated part separate from the shielded electric wire 11 is used.

[0031] The front end of the cylindrical shielding member 15 is crimped to the core wire 12 by a clip 40. With this configuration, there is no risk of the cylindrical shielding member 15 being displaced rearward relative to the core wire 12, so that the core wire 12 can be prevented from being exposed between the front end of the cylindrical shielding member 15 and the terminal fitting 25.

[0032] A conductive adhesive tape 45 is wrapped around the outer surface of the clip 40 and the outer surface of the cylindrical shielding member 15. According to this configuration, the adhesive force of the conductive adhesive tape 45 can suppress misalignment of the cylindrical shielding member 15 with respect to the clip 40.

[0033] The cylindrical shielding member 15 is composed of a shielding foil 16 surrounding the pair of core wires 12, and a braided wire 17 surrounding the shielding foil 16. The braided wire 17 is connected to an outer conductor 35 surrounding a terminal fitting 25. The shielding foil 16 functions as a conductive member 21. This configuration makes it possible to achieve both a connection structure between the outer conductor 35 and the cylindrical shielding member 15 and a structure in which the cylindrical shielding member 15 surrounds the core wires 12.

[0034] [Example 2] A terminal module B according to a second embodiment of the present disclosure will be described with reference to Fig. 5. In this second embodiment, the front-rear direction is defined as the F direction in Fig. 5. The left-right direction is defined as the R direction in Fig. 5. A conductive path 50 with terminal of the terminal module B according to the second embodiment has a conductive member 51 and a part of the terminal structure at the front end of the shielded electric wire 11 configured differently from those in the first embodiment. As the other configurations are the same as those in the first embodiment, the same reference numerals are used for the same configurations, and descriptions of the structure, action, and effect will be omitted.

[0035] In the second embodiment, the shield foil 16 of the shielded electric wire 11 does not extend forward beyond the sheath 18, and the entire front end of the shield foil 16 is accommodated within the sheath 18. The conductive member 51 is made of a conductive adhesive tape 52, which is a dedicated member separate from the shield foil 16. The conductive adhesive tape 52 is, for example, a long and narrow metal sheet coated with an adhesive or a pressure sensitive adhesive (not shown) on one side. The conductive adhesive tape 52 is not wrapped around the two lead-out portions 22 as a whole, but is wrapped around each lead-out portion 22 individually. The range in which the conductive adhesive tape 52 surrounds the lead-out portion 22 is an area extending from the middle position of the area where the clip 40 is fixed to the front end 16F of the shield foil 16. The rear end of the conductive adhesive tape 52 is in contact with the front end of the shield foil 16 so as to be conductive.

[0036] After wrapping the conductive adhesive tape 52 around each core wire 12, the clip 40 is fixed to the two lead-out portions 22 by crimping. The front end region of the conductive adhesive tape 52 is sandwiched between the inner surface of the clip 40 and the outer circumferential surface of the core wire 12 (lead-out portion 22). The conductive adhesive tape 52 and the clip 40 are in conductive contact. Between the rear end 40R of the clip 40 and the front end 18F of the sheath 18, the lead-out portion 22 is surrounded by the conductive adhesive tape 52 without being exposed.

[0037] The conductive member 51 of the terminal module B of the second embodiment is made of a conductive adhesive tape 52 attached to the outer surface of the core wire 12, so that the weight can be reduced compared to a case where the conductive member is a thick metal plate material. The front end of the conductive adhesive tape 52 is crimped to the core wire 12 by the clip 40, so that the positional deviation of the conductive adhesive tape 52 with respect to the core wire 12 can be suppressed.

[0038] [Example 3] A terminal module C according to a third embodiment of the present disclosure will be described with reference to Fig. 6. In this third embodiment, the front-rear direction is defined as the F direction in Fig. 6, and the left-right direction is defined as the R direction in Fig. 6. The terminal-equipped conductive path 60 of the terminal module C according to the third embodiment has a conductive member 61 configured differently from that of the second embodiment. As the other configurations are the same as those of the second embodiment, the same reference numerals are used for the same configurations, and descriptions of the structure, action, and effect will be omitted.

[0039] The conductive member 61 of the present embodiment 3 is made of a conductive adhesive tape 62, which is a dedicated member separate from the shielding foil 16. The conductive adhesive tape 62 is, for example, a long, thin metal sheet with an adhesive or a pressure sensitive adhesive (not shown) applied to both sides. The conductive adhesive tape 62 is wound around the two lead-out portions 22 as a whole. The range in which the conductive adhesive tape 62 surrounds the lead-out portion 22 is an area extending from the middle position of the area where the clip 40 is fixed to the front end 16F of the shielding foil 16. The rear end of the conductive adhesive tape 62 is in contact with the front end of the shielding foil 16 so as to be conductive.

[0040] The clip 40 and the conductive adhesive tape 62 are attached to the core wire 12 (lead-out portion 22) in the following procedure. First, before the clip 40 is crimped to the core wire 12, the conductive adhesive tape 62 is attached to the inner surface of the clip 40 in advance. At this time, a part of the conductive adhesive tape 62 is set to protrude rearward beyond the rear end 40R of the clip 40. The protruding length of the conductive adhesive tape 62 from the rear end 40R of the clip 40 is set to be longer than the distance between the rear end 40R of the clip 40 and the front end 18F of the sheath 18.

[0041] Next, the clip 40 with the conductive adhesive tape 62 attached thereto is crimped to the two core wires 12 (lead-out portions 22). The front end region of the conductive adhesive tape 62 is sandwiched between the inner surface of the clip 40 and the outer circumferential surface of the core wire 12 (lead-out portions 22). In the crimping process, the portion of the conductive adhesive tape 62 extending rearward from the clip 40 is attached to the outer circumferential surfaces of the two lead-out portions 22. As a result, the lead-out portions 22 are surrounded by the conductive adhesive tape 62 between the rear end 40R of the clip 40 and the front end 18F of the sheath 18 without being exposed.

[0042] The length of the conductive adhesive tape 62 extending from the rear end 40R of the clip 40 is set to be longer than the distance between the rear end 40R of the clip 40 and the front end 18F of the sheath 18, so that the lead-out portion 22 (core wire 12) is not exposed between the rear end of the conductive adhesive tape 62 and the front end of the shielding foil 16. Even if the rear end of the conductive adhesive tape 62 sticks to the sheath 18 or the braided wire 17, communication performance is not affected.

[0043] A front end of the conductive member 61 is affixed to the surface of the clip 40 facing the core wire 12. With this configuration, the step of attaching the clip 40 to the core wire 12 and the step of attaching the conductive member 61 to the core wire 12 can be performed in a single step. The conductive member 61 is made of a conductive adhesive tape 62, and the conductive adhesive tape 62 is affixed to the core wire 12. With this configuration, the region of the lead-out portion 22 of the core wire 12 behind the clip 40 can be reliably surrounded by the conductive member 61.

[0044] [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. In Examples 1-3, the cylindrical shielding member may be made of only a shielding foil or only a braided wire. In the first embodiment, the front end of the cylindrical shielding member may not be crimped to the core wire by a clip. In the first embodiment, the clip and the outer surface of the cylindrical shielding member may not be wrapped with the conductive adhesive tape. In the first embodiment, when the cylindrical shielding member is composed only of the braided wire, the braided wire can function as a conductive member. In the second embodiment, the front end of the conductive adhesive tape may not be crimped to the core wire by a clip. In the third embodiment, the conductive member may be a plate-shaped part made of metal. In the third embodiment, the conductive adhesive tape may be a single-sided adhesive type, and the conductive adhesive tape may be attached only to the clip and not to the core wire. [Explanation of symbols]

[0045] A…Terminal module B…Terminal module C…Terminal module 10...Terminal-equipped conductive path 11...Shielded wire 12…Core wire 13...Core wire 14…Insulating coating 15...Cylindrical shielding member 16...Shielding foil 16F: Front end of shield foil 17...braided wire 18…Sheath 18F…Front end of sheath 19…Containment space 20...Extending part 21...Conductive material 22…Derivation part 23...Folding section 25...Terminal fitting 26…Terminal body 27…Wire barrel part 28…Insulation barrel part 30...Dielectric 31...Upper member 32...Lower member 33...Terminal chamber 35…Outer conductor 36…Front member 37...Rear member 38…Cylindrical crimping section 40…Clip 40R…Rear end of clip 41...Holding part 42...Connection part 45...Conductive adhesive tape 50...Terminal-equipped conductive path 51...Conductive material 52...Conductive adhesive tape 60...Conductive path with terminal 61...Conductive material 62...Conductive adhesive tape

Claims

1. a shielded electric wire in which a pair of core wires are inserted into a cylindrical shielding member surrounded by a sheath; a pair of terminal fittings fixed to front end portions of the pair of core wires led forward from the sheath; A pair of impedance adjusting clips fixed to the lead-out portions; a conductive member surrounding the area of ​​the pair of lead-out portions between the rear end of the clip and the front end of the sheath.

2. 2. The terminal module according to claim 1, wherein the conductive member is formed by an extension portion of the cylindrical shield member that extends forward beyond the sheath.

3. 3. The terminal module according to claim 2, wherein the front end of the cylindrical shielding member is crimped to the core wire by the clip.

4. 3. The terminal module according to claim 2, wherein a conductive adhesive tape is wound around an outer surface of the clip and an outer surface of the cylindrical shielding member.

5. the cylindrical shielding member is composed of a shielding foil surrounding the pair of core wires and a braided wire surrounding the shielding foil, The braided wire is connected to an outer conductor surrounding the terminal fitting, The terminal module according to claim 1 , wherein the shielding foil functions as the conductive member.

6. 2. The terminal module according to claim 1, wherein the conductive member is a conductive adhesive tape attached to an outer surface of the core wire.

7. 7. The terminal module according to claim 6, wherein the front end of the conductive adhesive tape is crimped to the core wire by the clip.

8. 2. The terminal module according to claim 1, wherein a front end of the conductive member is attached to a surface of the clip that faces the core wire.

9. 9. The terminal module according to claim 8, wherein the conductive member is made of a conductive adhesive tape, and the conductive adhesive tape is attached to the core wire.

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