Cable with connector

Abstract

A cable with a connector includes: a cable having a plurality of coaxial wires; and a connector connected to the cable, the connector having a substrate and a ground bar connected to the coaxial wires, the coaxial wires having a center conductor, an insulating layer covering the center conductor, an outer conductor covering the insulating layer, and an outer sheath covering the outer conductor, the center conductor, the insulating layer, and the outer conductor being exposed in this order at the ends of the plurality of coaxial wires, the plurality of coaxial electric wires are divided into a first group and a second group, the coaxial electric wires of the first group are connected to the first surface of the substrate, the coaxial electric wires of the second group are connected to the second surface of the substrate, and in a projection drawing of the plurality of coaxial electric wires on the substrate viewed from a direction orthogonal to the first surface or the second surface, the coaxial electric wires of the first group and the coaxial electric wires of the second group are aligned. The center lines of the plurality of coaxial wires in the axial direction are arranged so as not to overlap with the outer conductors of the other coaxial wires, the ground bar is configured from a single member, and the outer conductors of all coaxial wires are connected to the ground bar.

Description

Technical Field

[0001] The present disclosure relates to cables with connectors. Background Art

[0002] The cable with a connector described in Patent Document 1 discloses an example in which a pair of coaxial electric wires are connected to the front and back surfaces of a substrate, respectively.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: International Publication No. 2021 / 161570

[0006] Furthermore, in the cable with a connector described in Patent Document 1, it is necessary to perform processing on the electric wire several times when grounding the electric wire. Summary of the invention

[0007] An object of the present disclosure is to provide a cable with a connector that can simplify the process of connecting electric wires.

[0008] A cable with a connector according to one embodiment of the present disclosure comprises: a cable having a plurality of coaxial wires; and a connector connected to the cable, the connector having a substrate and a grounding strip connected to the coaxial wires, the coaxial wires having a central conductor, an insulating layer covering the central conductor, an outer conductor covering the insulating layer, and an outer sheath covering the outer conductor, the central conductor, the insulating layer, and the outer conductor being exposed in sequence at ends of the plurality of coaxial wires, the plurality of coaxial wires being divided into a first group and a second group, the coaxial wires of the first group being connected to a first surface of the substrate, and the coaxial wires of the second group being connected to a second surface of the substrate, in a projection view of the plurality of coaxial wires located on the substrate viewed from a direction orthogonal to the first surface or the second surface, the center lines of the plurality of coaxial wires in the axial direction are arranged so as not to overlap with the outer conductors of other coaxial wires, the grounding strip being composed of a single member, and the outer conductors of all the coaxial wires being connected to the grounding strip.

[0009] Effects of the Invention

[0010] According to the above, the process of connecting the electric wires in the cable with a connector can be simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic perspective view showing an example of a cable with a connector according to the present disclosure.

[0012] Figure 2 yes Figure 1 An enlarged view of the end of the cable is shown.

[0013] Figure 3 This is a schematic perspective view showing an example of a connection method between a substrate and a coaxial cable according to the present disclosure.

[0014] Figure 4 Yes means Figure 3 A top view of the connection method of the cable with connector is shown.

[0015] Figure 5 Yes means Figure 3 Bottom view of the cable with connector shown connected.

[0016] Figure 6 Yes means Figure 3 A cross-sectional view perpendicular to the axial direction showing a connection method of a cable with a connector.

[0017] Description of reference numerals:

[0018] 1: cable with connector; 2: cable; 3: connector; 4: substrate; 4a: first side; 4b: second side; 5: shell; 6: sheath; 7: connecting part; 10: coaxial wire; 10a: first group; 10b: second group; 11: center conductor; 12: insulating layer; 13: outer conductor; 14: outer skin; 20, 30: wiring part; 21, 31: lead pad; 22, 32: connector pad; 50: grounding strip; 51: segmented part; 51a, 51c: first segment; 51b: second segment; 52: connecting surface; 53: bonding part. DETAILED DESCRIPTION

[0019] [Description of Embodiments of the Present Disclosure]

[0020] First, embodiments of the present disclosure will be described by way of examples.

[0021] (1) A cable with a connector according to one embodiment of the present disclosure comprises: a cable having a plurality of coaxial wires; a connector connected to the cable, the connector having a substrate and a grounding strip connected to the coaxial wires, the coaxial wires having a central conductor, an insulating layer covering the central conductor, an outer conductor covering the insulating layer, and a sheath covering the outer conductor, the central conductor, the insulating layer, and the outer conductor being exposed in sequence at ends of the plurality of coaxial wires, the plurality of coaxial wires being divided into a first group and a second group, the coaxial wires of the first group being connected to a first surface of the substrate, and the coaxial wires of the second group being connected to a second surface of the substrate, the center lines of the plurality of coaxial wires in the axial direction being arranged so as not to overlap with the outer conductors of other coaxial wires in a projection view of the plurality of coaxial wires located on the substrate from a direction orthogonal to the first surface or the second surface, the grounding strip being formed of a single member, and the outer conductors of all the coaxial wires being connected to the grounding strip.

[0022] According to this configuration, the ground bar is formed of a single member, and the outer conductors of all the coaxial wires connected to the first surface and the second surface of the substrate in a two-dimensional arrangement can be connected to the single ground bar. In addition, the plurality of coaxial wires are arranged so that they do not overlap or overlap only a little when viewed from a direction perpendicular to the surface of the substrate. This simplifies the connection process when connecting a cable including coaxial wires to a connector.

[0023] (2) In the above (1), the grounding bar may have a stepped portion having at least a first level and a second level, the outer conductors of the first group of coaxial wires may be connected to the first level, and the outer conductors of the second group of coaxial wires may be connected to the second level.

[0024] According to this configuration, the grounding of the two-dimensionally arranged coaxial wires can be achieved through one surface of the grounding strip. Thus, when the coaxial wires are bonded to the grounding strip by welding or a conductive adhesive, the coaxial wires can be connected to the surfaces in the same direction of a single grounding strip. Therefore, according to the present disclosure, the process of connecting the coaxial wires can be simplified.

[0025] (3) In the above (1) or (2), the ground bar may have a plurality of connection surfaces parallel to the substrate, and the outer conductors of all the coaxial wires may be connected to the plurality of connection surfaces.

[0026] According to this configuration, the grounding bar has a connection surface parallel to the substrate. Thus, the coaxial wire connected to the grounding bar is connected parallel to the substrate, so that the processing of the coaxial wire is easy. Therefore, a cable with a connector that can simplify the process of connecting the coaxial wire can be provided.

[0027] (4) In any one of the above (1) to (3), the coaxial wires may be connected to the first surface and the second surface in one or more pairs.

[0028] (5) It may also be that in any one of the above (1) to (4), on the first surface of the substrate, the coaxial wire is connected to the two end portions of the substrate in the arrangement direction of the coaxial wire, and on the second surface of the substrate, the coaxial wire is connected to the center portion of the substrate in the arrangement direction of the coaxial wire.

[0029] (6) In any one of the above (1) to (5), the outer conductor may be connected to the ground bar via a conductive adhesive.

[0030] (7) In the above (6), the insulating layer may be made of a thermoplastic elastomer or a polyolefin.

[0031] (8) In the above (6), the insulating layer may include at least polyethylene or polypropylene.

[0032] [Details of the embodiments of the present disclosure]

[0033] Hereinafter, specific examples of the cable with connector according to the embodiment of the present disclosure will be described with reference to the drawings. It should be noted that the present disclosure is not limited to these examples, but is indicated by the claims, and is intended to include all changes within the meaning and scope equivalent to the claims.

[0034] It should be noted that in Figure 1 U, D, F, B, R, and L shown in the figure represent the directions of the cable 1 with a connector, where U is upward, D is downward, F is forward, B is backward, R is right, and L is left.

[0035] Figure 1 1 is a schematic perspective view showing an example of a cable 1 with a connector according to the present disclosure. The cable 1 with a connector according to the present embodiment can be used, for example, to connect electronic devices (not shown) to each other, and a connector 3 is provided at the end of the cable 2. Figure 1 As shown, a cable 1 with a connector comprises a cable 2 and a connector 3 .

[0036] like Figure 1 As shown, the connector 3 further includes a substrate 4, a housing 5 covering the substrate 4, and a connecting portion 7. The substrate 4 has a wiring portion 20 (30) printed with a circuit pattern on the surface facing the upward direction (U direction) and the back surface facing the downward direction (D direction) (see Figure 3). A sheath 6 for protecting the connection portion between the cable 2 and the connector 3 is provided at one end of the housing 5. In the following description, for the sake of convenience, the direction from the center of the connector 3 toward the connection portion 7 is referred to as the front F, and the direction opposite to the front F and from the center of the connector 3 toward the sheath 6 is referred to as the rear B. The connection portion 7 protrudes toward the front F. A plurality of device-side wiring portions (not shown) are provided at the connection portion 7. When the cable 1 with a connector is connected to an electronic device, these device-side wiring portions are electrically connected to the wiring inside the electronic device.

[0037] Next, refer to Figure 2 The cable 2 in this embodiment will be described. Figure 2 yes Figure 1 An enlarged view of the front end of the cable 2 is shown.

[0038] like Figure 2 As shown, the cable 2 has a plurality of coaxial wires 10. The coaxial wire 10 has a central conductor 11, an insulating layer 12 covering the central conductor 11, an outer conductor 13 covering the insulating layer 12, and a sheath 14 covering the outer conductor 13. The ends of the coaxial wires 10 in the F direction are stripped step by step in such a manner that the central conductor 11, the insulating layer 12, and the outer conductor 13 are exposed in sequence.

[0039] The center conductor 11 is a single wire or a stranded wire formed by twisting a plurality of thin wires made of a conductive metal such as a copper alloy. The insulating layer 12 is formed of an insulating resin, protects the center conductor 11, and electrically insulates the center conductor 11 from the surroundings. The outer conductor 13 is formed of a metal braid, metal plating, etc., and suppresses leakage of a signal flowing in the center conductor 11 or suppresses intrusion of external radio waves into the center conductor 11. The sheath 14 is formed of an insulating resin, electrically insulates the outer conductor 13 from the outside, and suppresses damage to the outer conductor 13.

[0040] A plurality of coaxial wires 10 are arranged in pairs, such as Figure 2 As shown, the coaxial wires 10 are divided into a first group 10a and a second group 10b. In this embodiment, the coaxial wires 10 are connected to the substrate 4 in pairs of two. The first group 10a and the second group 10b have at least one pair of coaxial wires 10 (two pairs each in this example).

[0041] Next, refer to Figure 3 , Figure 4 as well as Figure 5 The connection method between the coaxial electric wire 10 and the substrate 4 in this embodiment will be described. Figure 3 This is a schematic perspective view showing an example of a connection method between a substrate and a coaxial cable according to the present disclosure. Figure 4 Yes means Figure 3 A top view of the connection method of the cable with connector is shown. Figure 5 Yes means Figure 3 Bottom view of the cable with connector shown connected.

[0042] like Figure 3 As shown, the connector 3 has a substrate 4 and a grounding strip 50. The substrate 4 has a first surface 4a on the front surface and a second surface 4b on the back surface. The first surface 4a has a wiring portion 20 to which a power line can be connected. Figure 3 and Figure 4 As shown, the wiring portion 20 of the first surface 4a has a lead pad 21 and a connector pad 22 to which the coaxial wire 10 can be connected. Figure 3 and Figure 5 As shown, the second surface 4b has a wiring portion 30 similar to the first surface 4a, and the wiring portion 30 has a lead pad 31 and a connector pad 32 similar to the wiring portion 20. The connector pad 22 of the first surface 4a and the connector pad 32 of the second surface 4b are configured to be electrically connected to an electrical device (not shown) connected to the connector 3.

[0043] The coaxial wire 10 is stripped step by step at the end in the F direction and connected to the substrate 4 and the ground bar 50. The coaxial wire 10 and the substrate 4 are connected by soldering the central conductor 11 to the lead pad 21 provided on the wiring portion 20 of the substrate 4 or the lead pad 31 on the wiring portion 30. The first group 10a of the coaxial wires 10 is connected to the first surface 4a of the substrate 4, and the second group 10b of the coaxial wires 10 is connected to the second surface 4b of the substrate 4. The central conductor 11 of the coaxial wire 10 in the first group 10a is connected to the lead pad 21 on the first surface 4a. The central conductor 11 of the coaxial wire 10 in the second group 10b is connected to the lead pad 31 on the second surface 4b. The coaxial wires 10 are connected to the first surface 4a and the second surface 4b in one or more pairs.

[0044] Figure 3 The grounding strip 50 shown is a member composed of a single member, and is capable of grounding the outer conductor 13 of the coaxial wire 10. The grounding strip 50 is connected to a grounding terminal of the substrate 4 or a shell (not shown) in the connector. The grounding strip 50 is a thin plate-shaped member formed so as to extend in the width direction of the substrate 4, and has a stepped portion 51 having at least two (three in this example) steps and a plurality of connection surfaces 52. All the coaxial wires 10 are connected to any one of the plurality of connection surfaces 52.

[0045] In the present embodiment, the grounding strip 50 has a stepped portion 51 including a first level 51a, a first level 51c, and a second level 51b, and all the levels included in the stepped portion 51 also function as a connection surface 52. In the present embodiment, the first level 51a has a first connection surface 52a, the second level 51b has a second connection surface 52b, and the first level 51c has a third connection surface 52c. The first level 51a and the first level 51c are formed to have the same height in a direction perpendicular to the surface of the substrate 4, and the second level 51b is formed to have a height one level lower than the first level 51a and the first level 51c. It should be noted that the height difference of the second level 51b relative to the first level 51a and the first level 51c is substantially equal to the sum of the thickness of the substrate 4 and the outer diameter of the outer conductor 13.

[0046] The connection between the coaxial wire 10 and the grounding bar 50 is achieved by connecting the outer conductor 13 and the grounding bar 50 at the connection surface 52. Figure 5 As shown in the perspective view in FIG. 1 , in order to make the potentials of both the outer conductors 13 and the grounding strip 50 the same and to fix the connection state, an adhesive portion 53 such as solder or conductive adhesive is provided at the connection position between the outer conductor 13 and the grounding strip 50. For the first group 10a of the coaxial wires 10, each outer conductor 13 is arranged on the first level 51a (first connection surface 52a) and the first level 51c (third connection surface 52c), and connected by the adhesive portion 53. The coaxial wires 10 of the first group 10a are arranged in the same plane along the first surface 4a of the substrate 4, and connected to the first level 51a and the first level 51c at the same height in the grounding strip 50. The second group 10b of the coaxial wires 10 are arranged in the same plane along the second surface 4b of the substrate 4, and are arranged on the second level 51b (second connection surface 52b), and connected by the adhesive portion 53.

[0047] The plurality of coaxial wires 10 are arranged such that at the portion connected to the ground bar 50, Figure 4 The top view shown or Figure 5 When viewed from above, the two images shown do not overlap or overlap only a little. Figure 4 and Figure 5 As shown, the coaxial wires 10 of the first group 10 a connected to the first surface 4 a and the coaxial wires 10 of the second group 10 b connected to the second surface 4 b are arranged in the width direction of the substrate 4 and do not overlap each other.

[0048] The cable with connector of the present disclosure is configured as follows: Figure 4 and Figure 5 As shown, when the coaxial wire 10 is viewed from a projection view perpendicular to the first surface 4a or the second surface 4b, the center line of the coaxial wire 10 along the axial direction (for example Figure 4 The center line C1 and the center line C2 in the coaxial cable 10 do not overlap with the outer conductor 13 of other coaxial cables 10.

[0049] Here, for a detailed description of the above configuration, refer to Figure 6 . Figure 6 Yes means Figure 3 The cross-sectional view perpendicular to the axial direction is shown in the figure. Figure 6 As shown, the center line of the coaxial wire 10 connected to the first surface 4a and the second surface 4b is configured not to overlap with the outer conductor of other coaxial wires 10. Figure 6 When the two center lines of the two coaxial wires connected to different surfaces and having the shortest distance in the LR direction are set as C3 and C4, the coaxial wire 10 with the center line C3 is arranged so as not to overlap with the outer conductor of the coaxial wire 10 with the center line C4 connected to the second surface 4b.

[0050] like Figure 4 , Figure 5 as well as Figure 6 As shown, in this embodiment, on the first surface 4a of the substrate 4, each coaxial wire 10 is connected to the two end portions in the width direction of the substrate 4 in the arrangement direction of the coaxial wire 10, and on the second surface 4b of the substrate 4, each coaxial wire 10 is connected to the center portion of the substrate 4 in the arrangement direction of the coaxial wire 10.

[0051] exist Figures 2 to 6 Although not shown in the figure for the sake of visibility of the drawing, the cable 2 may include electric wires other than the coaxial electric wire 10. In addition, electric wires other than the coaxial electric wire 10 may be connected to the substrate 4.

[0052] In conventional cables with connectors, when grounding a coaxial wire, the outer conductor of the coaxial wire is sometimes connected to a ground pad provided on a substrate or a ground strip provided separately from the substrate. When connecting the coaxial wire to a substrate or a ground strip, in order to expose the center conductor and the outer conductor, it is necessary to irradiate the coaxial wire with a laser and peel off the coaxial wire step by step. From the perspective of the efficiency of the connection process, the step-by-step peeling of the coaxial wire is mostly performed in an arrangement state immediately before connecting the coaxial wire to the substrate or the ground strip. However, when connecting multiple coaxial wires to both sides of a substrate, it is necessary to remove the covering of the coaxial wire by laser or the like for each side of the coaxial wire to be connected, and then connect the coaxial wire to a different ground strip for each side of the substrate, which is very cumbersome.

[0053] Therefore, the present inventors have found that the connection process can be simplified by connecting the outer conductors of all the coaxial wires to a single ground bar that is separate from the substrate.

[0054] According to the cable 1 with connector of the present disclosure, the grounding strip 50 is composed of a single member, and the outer conductors 13 of all the coaxial wires 10 connected to the first surface 4a and the second surface 4b of the substrate 4 in a two-dimensional arrangement can be connected to the single grounding strip 50. In addition, the plurality of coaxial wires are arranged so that they do not overlap or overlap only a little when viewed from a direction perpendicular to the surface of the substrate. As a result, the connection process when connecting the plurality of coaxial wires 10 included in the cable 2 to the substrate 4 can be simplified. In addition, since it is not necessary to provide a grounding strip on each surface of the substrate, the number of components can be reduced.

[0055] It should be noted that, in the above-mentioned embodiment, a thermoplastic elastomer or a polyolefin may be used as the insulating resin forming the insulating layer 12. By using these materials, the amount of fluorine used can be suppressed. In addition, the above-mentioned thermoplastic elastomer may also include polyethylene or polypropylene. When the above-mentioned thermoplastic elastomer or polyolefin is used as the insulating layer 12 of the coaxial wire 10, in order to avoid melting of the insulating layer 12 due to heat, a conductive adhesive that can be bonded without heating may be used as the bonding portion 53 to bond to the grounding strip 50.

[0056] It should be noted that, as in the present embodiment, the coaxial wires 10 may be connected to both ends of the coaxial wires 10 of the substrate 4 on the first surface 4a, and connected to the center of the coaxial wires 10 of the substrate 4 on the second surface 4b. Figure 4 In the plan view shown in FIG. 1 , the diameter d of the insulating layer 12 and the distance S between the center lines of the coaxial wire 10 satisfy the relationship of the following equation (1).

[0057] S ≥ 0.85d……(1)

[0058] By arranging the coaxial wires 10 so as to satisfy the above relationship, the area where the coaxial wires 10 overlap each other can be reduced when viewed from above or below. In addition, the outer conductors of all the coaxial wires can be connected to a single ground bar.

[0059] The embodiments of the present disclosure are described above, but it goes without saying that the technical scope of the present disclosure should not be interpreted in a limited manner by the description of the embodiments. Those skilled in the art should understand that the present embodiment is only an example, and various changes in the embodiments can be made within the scope of the invention described in the claims. The technical scope of the present disclosure should be determined based on the scope of the invention described in the claims and its equivalent scope.

Claims

1. A cable with a connector, comprising: a cable having a plurality of coaxial wires; and A connector connected to the cable, The connector has a substrate and a grounding strip connected to the coaxial wire. The coaxial wire includes a central conductor, an insulating layer covering the central conductor, an outer conductor covering the insulating layer, and a sheath covering the outer conductor. At the ends of the plurality of coaxial wires, the central conductor, the insulating layer, and the outer conductor are exposed in sequence. The plurality of coaxial wires are divided into a first group and a second group, The first group of coaxial wires is connected to the first surface of the substrate, The coaxial wires of the second group are connected to the second surface of the substrate, In a projection diagram of the plurality of coaxial wires located on the substrate viewed from a direction orthogonal to the first surface or the second surface, The center lines of the plurality of coaxial wires in the axial direction are arranged so as not to overlap with the outer conductors of other coaxial wires. The grounding strip is composed of a single component. The outer conductors of all of the coaxial wires are connected to the ground bar.

2. The cable with connector according to claim 1, wherein: The grounding strip has a stepped portion having at least a first level and a second level, The outer conductors of the coaxial wires of the first set are connected to the first stage, The outer conductors of the coaxial wires of the second set are connected to the second stage.

3. The cable with connector according to claim 1 or 2, wherein: The ground bar has a plurality of connection surfaces parallel to the substrate, and the outer conductors of all the coaxial wires are connected to the plurality of connection surfaces.

4. The cable with connector according to claim 1 or 2, wherein: The coaxial wires are connected to the first surface and the second surface in one or more pairs.

5. The cable with connector according to claim 1 or 2, wherein: On the first surface of the substrate, the coaxial wires are connected to both ends of the substrate in the arrangement direction of the coaxial wires, and on the second surface of the substrate, the coaxial wires are connected to the center of the substrate in the arrangement direction of the coaxial wires.

6. The cable with connector according to claim 1 or 2, wherein: The outer conductor is connected to the ground bar via a conductive adhesive.

7. The cable with connector according to claim 6, wherein: The insulating layer is thermoplastic elastomer or polyolefin.

8. The cable with connector according to claim 6, wherein: The insulating layer contains at least polyethylene or polypropylene.

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