Cable with connector

Abstract

A cable with a connector includes: a cable having a plurality of electric wires; and a connector connected to the cable, the connector having a substrate, the electric wires having conductors and an insulating layer covering the conductors, at least a portion of the plurality of electric wires being adjacently connected to the substrate in pairs of two, a portion of the plurality of conductors being connected to a first surface of the substrate, another portion of the plurality of conductors being connected to a second surface on a back side of the first surface, in a projection drawing in which the electric wires are viewed from a direction orthogonal to the first surface or the second surface, an overlap width between a pair of electric wires of a first group connected to the first surface and a pair of electric wires of a second group connected to the second surface is smaller than a diameter of the electric wires, the pair of electric wires being connected to different surfaces and being closest in the projection drawing. When the distance between the center lines of two electric wires which are connected to mutually different surfaces and overlap in a projection drawing is S and the diameter of the insulating layer of the electric wire is d, the relationship of the following equation (1) is satisfied: S > = 0.35 d... (1).

Description

Technical Field

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

[0002] Patent Document 1 discloses a cable with a connector 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 invention comprises: a cable having a plurality of electric wires; and a connector connected to the cable, the connector having a substrate, the electric wires having a conductor and an insulating layer covering the conductor, at least a portion of the plurality of electric wires being connected to the substrate in pairs of two adjacent to each other, a portion of the plurality of conductors being connected to a first surface of the substrate, and another portion of the plurality of conductors being connected to a second surface on the back side of the first surface, in a projection diagram of the electric wires observed from a direction orthogonal to the first surface or the second surface, an overlapping width of a first group of electric wire pairs connected to the first surface and a second group of electric wire pairs connected to the second surface among electric wire pairs connected to different surfaces and closest to each other as viewed in the projection diagram is smaller than a diameter of the electric wires, and when the distance between the center lines of the two electric wires connected to different surfaces and overlapping in the projection diagram is set to S and the diameter of the insulating layer of the electric wire is set to d, the following relationship of formula (1) is satisfied: S ≥ 0.35d ... (1).

[0009] Effects of the Invention

[0010] According to the above, in the cable with a connector, the process of connecting the electric wire to the substrate 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 front 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 an electric wire according to the present disclosure.

[0014] Figure 4 This is a projection diagram of the electric wire and the substrate as viewed from a direction perpendicular to the first surface of the substrate.

[0015] Figure 5A It is a cross-sectional view orthogonal to the axial direction of the electric wire and the board|substrate, showing the connection form of the cable with a connector of embodiment.

[0016] Figure 5B This is a cross-sectional view perpendicular to the axial direction of the electric wire and the substrate, showing another example of the connection method of the cable with a connector of the present disclosure.

[0017] Figure 5C This is a cross-sectional view perpendicular to the axial direction of the electric wire and the substrate, showing another example of the connection method of the cable with a connector of the present disclosure.

[0018] Description of reference numerals:

[0019] 1: Cable with connector; 2: Cable; 3: Connector; 4: Substrate; 4a: First side; 4b: Second side; 5: Jacket; 6: Strain relief; 7: Connecting part; 10, 10A, 10B: Coaxial wire; 10a: First group; 10b: Second group; 11: Center conductor; 12: Inner insulation layer; 13: Outer conductor; 14: Sheath; 20, 30: Wiring part; 21, 31: Lead pad; 22, 32: Connector pad; 23, 33: Ground pad; C1, C2: Center line. DETAILED DESCRIPTION

[0020] [Description of Embodiments of the Present Disclosure]

[0021] First, embodiments of the present disclosure will be described by way of examples.

[0022] (1) A cable with a connector according to one embodiment of the present disclosure comprises: a cable having a plurality of electric wires; and a connector connected to the cable, the connector having a substrate, the electric wires having a conductor and an insulating layer covering the conductor, at least a portion of the plurality of electric wires being connected to the substrate in pairs of two adjacent to each other, a portion of the plurality of conductors being connected to a first surface of the substrate, and another portion of the plurality of conductors being connected to a second surface on the back side of the first surface, in a projection view of the electric wires viewed from a direction orthogonal to the first surface or the second surface, among pairs of electric wires connected to different surfaces and closest to each other as viewed in the projection view, an overlapping width between a first group of electric wire pairs connected to the first surface and a second group of electric wire pairs connected to the second surface is smaller than a diameter of the electric wires, and when a distance between center lines of two electric wires connected to different surfaces and overlapping in the projection view is denoted as S, and a diameter of the insulating layer of the electric wires is denoted as d, the following relationship of formula (1) is satisfied: S ≥ 0.35d ...

[0023] (1).

[0024] According to this configuration, the overlapped portion of the wires in the projection of the cable with connector viewed from a direction perpendicular to the surface of the substrate can be reduced. When the laser is irradiated from the upper part (or lower part) of the parallel surface of the wires and the irradiation point is moved in the arrangement direction of the wires to burn off the insulation layer of the wires, the laser can be irradiated to both the wires attached to the surface of the substrate and the wires attached to the back of the substrate in one operation, and the insulation layer of the wires can be cut. As a result, the pre-processing process before connecting the wires to the substrate can be simplified.

[0025] (2) In the above (1), the electric wire may be a coaxial electric wire including the conductor, an inner insulating layer, an outer conductor covering the inner insulating layer, and the insulating layer covering the outer conductor.

[0026] According to this configuration, when a coaxial electric wire that requires multiple processing times before substrate connection is used, the pre-processing steps can be simplified in particular.

[0027] (3) In the above (1) or (2), in the projection diagram, the diameter d of the insulating layer and the distance S satisfy the relationship of the following equation (2): S ≥ 0.85d …… (2).

[0028] By arranging the electric wires so as to satisfy the above-mentioned relational expression, it is possible to provide a cable with a connector that can simplify the process of connecting the electric wires to the substrate.

[0029] (4) In any one of the above (1) to (3), the electric wires may be connected to the first surface and the second surface in an even number of pairs.

[0030] [Details of the embodiments of the present disclosure]

[0031] 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.

[0032] 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.

[0033] 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 .

[0034] like Figure 1 As shown, the connector 3 includes a substrate 4, a sheath 5 covering the substrate 4, and a connection portion 7. The substrate 4 has a wiring portion 20 (see FIG. 1 ) on which a circuit pattern is printed on the surface facing upward (U direction) and the back surface facing downward (D direction). Figure 3 ). A strain relief 6 for protecting the connection between the cable 2 and the connector 3 is provided at one end of the sheath 5. In the following description, for convenience of description, the direction from the center of the connector 3 toward the connection portion 7 is referred to as the front, and the direction opposite to the front and from the center of the connector 3 toward the strain relief 6 is referred to as the rear. The connection portion 7 protrudes from the sheath 5 toward the front. When the cable 1 with a connector is connected to an electronic device, its device-side wiring portion is electrically connected to the wiring inside the electronic device.

[0035] 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.

[0036] like Figure 2As shown, the cable 2 in this embodiment has a plurality of coaxial wires 10 as wires. It should be noted that the wires used in the cable 2 of the present disclosure are not limited to coaxial wires, and for example, an insulated wire having a conductor and an insulating layer covering the conductor may also be used. The coaxial wire 10 has a center conductor 11, an inner insulating layer 12 covering the center conductor 11, an outer conductor 13 covering the inner insulating layer 12, and an outer sheath 14 covering the outer conductor 13. In this embodiment, the outer sheath 14 is also an insulating layer covering the outer conductor 13. The coaxial wire 10 is stripped step by step at the end so that the center conductor 11, the inner insulating layer 12, and the outer conductor 13 are exposed in sequence.

[0037] 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 inner 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 noise leakage or suppresses noise from being carried in the signal propagating through the center conductor 11. The outer sheath 14 is an insulating layer formed of an insulating resin, electrically insulates the outer conductor 13 from the outside, and suppresses damage to the outer conductor 13.

[0038] The plurality of coaxial wires 10 may be arranged in pairs of two. The coaxial wires 10 may be divided into a first group 10a connected to the surface of the substrate 4 and a second group 10b connected to the back surface of the substrate 4. It should be noted that the division method of the coaxial wires 10 is not limited to Figure 2 Example shown.

[0039] Next, refer to Figure 3 and Figure 4 The connection method between the coaxial electric wire 10 and the substrate 4 in this embodiment will be described.

[0040] Figure 3 1 is a schematic perspective view showing an example of a connection method between the substrate 4 and the coaxial wire 10 of the present disclosure. Figure 3 As shown, the substrate 4 has a first surface 4a and a second surface 4b on the back side of the first surface 4a. The first surface 4a has a wiring portion 20. Figure 4 The diagram is a projection diagram of the coaxial wire 10 and the substrate 4 as viewed from above the first surface 4a of the substrate 4, and is also a perspective diagram showing the coaxial wire 10 below the second surface 4b through the substrate 4 with a dotted line. The wiring portion 20 of the first surface 4a has a lead pad 21, a connector pad 22, and a ground pad 23. Figure 1The wiring is performed in the space within the connecting portion 7 shown, and the connector pad 22 is arranged at the frontmost position in the substrate 4. The ground pad 23 is arranged at the rearmost position in the substrate 4. The outer conductor 13 of the coaxial wire 10 is connected to the ground pad 23. The lead pad 21 is arranged on the substrate 4 closer to the center of the substrate than the ground pad 23. The lead pad 21 is electrically connected to the connector pad 22. Although omitted from the illustration, the second surface 4b has a wiring portion 30 in the same manner as the first surface 4a, and the wiring portion 30 has a lead pad 31, a connector pad 32 and a ground pad 33. It should be noted that the wiring portion 20 and the wiring portion 30 may not have the same wiring pattern. With respect to the lead pad 31 of the second surface 4b, its position in the right direction or the left direction is Figure 4 The connector pads 22 on the first surface 4a and the connector pads 32 on the second surface 4b are electrically connected to an electrical device (not shown) connected to the connector 3.

[0041] The coaxial wire 10 is stripped step by step at the end in the F direction and connected to the substrate 4. The central conductor 11 of the coaxial wire 10 is connected to the lead pad 21 on the wiring portion 20 of the substrate 4 or the lead pad 31 on the wiring portion 30 by welding or the like. The outer conductor 13 of the coaxial wire 10 is connected to the ground pad 23 on the wiring portion 20 of the substrate 4 or the ground pad 33 on the wiring portion 30 by welding or the like.

[0042] The first group 10a of coaxial wires 10 is connected to the first surface 4a of the substrate 4, and the second group 10b of coaxial wires 10 is connected to the second surface 4b of the substrate 4. The central conductors 11 of the coaxial wires 10 in the first group 10a are connected to the lead pads 21 on the first surface 4a in pairs of two. The central conductors 11 of the coaxial wires 10 in the second group 10b are connected to the lead pads 31 on the second surface 4b in pairs of two.

[0043] Furthermore, in the cable 1 with a connector of the present embodiment, in a projection diagram of the electric wires observed from a direction orthogonal to the first surface 4a or the second surface 4b, among the pairs of electric wires connected to different surfaces and closest to each other as viewed in the projection diagram, an overlapping width between a pair of electric wires of a first group 10a connected to the first surface 4a and a pair of electric wires of a second group 10b connected to the second surface 4b is smaller than a diameter of the electric wires.

[0044] For example, Figure 4 As shown, the wire pair 10X of the first group 10a is connected to the first surface 4a, and the wire pair 10Y of the second group 10b is connected to the second surface 4b. The wire pair 10X and the wire pair 10Y are connected to each other. Figure 4 The wire pair closest to each other in the projected view shown is arranged so that the overlapping width of the wire pair 10X and the wire pair 10Y is smaller than the diameter of the coaxial wire 10 .

[0045] In the cable 1 with connector of this embodiment, Figure 4 When observing in the middle, the diameter of the inner insulating layer 12 of the coaxial wire 10 is set to d, and Figure 4 When the distance between the center lines of two adjacent electric wires connected to different surfaces of the substrate is set to S, the relationship of the following formula (1) is satisfied. In other words, in the cable 1 with a connector of the present embodiment, when the distance between the center line of the coaxial electric wire 10 of one side (right or left) of the wire pair of the first group 10a and the center line of the coaxial electric wire 10 of the other side (left or right) of the wire pair of the second group 10b is set to S, and the diameter of the internal insulating layer of the coaxial electric wire 10 is set to d, the relationship of the following formula (1) is satisfied.

[0046] S ≥ 0.35d……(1)

[0047] To satisfy the above relationship, the plurality of coaxial wires 10 of the cable with connector 1 of the present disclosure are arranged so as not to overlap or to overlap only a little at the portion connected to the substrate 4 and at the portion slightly extending rearward from the substrate when viewed from above.

[0048] like Figure 4 As shown, in this embodiment, the coaxial wire 10A is connected to the first surface 4a of the substrate 4, and the coaxial wire 10B is connected to the second surface 4b of the substrate 4. The coaxial wire 10A and the coaxial wire 10B are adjacent wires when viewed from above, and the diameter d of the internal insulating layer 12 is 0.2 mm. On the other hand, the distance S between the center line C1 of the coaxial wire 10A and the center line C2 of the coaxial wire 10B is 0.3 mm. Therefore, in this example, S ≥ d, satisfying the relationship of the above formula (1). For example, when connecting the coaxial wire 10 whose diameter d of the internal insulating layer 12 is 0.2 mm, the distance S between the center line C1 and the center line C2 is allowed to be greater than 0.07 mm.

[0049] It should be noted that in the cable with connector 1 of the present disclosure, in order to further reduce the overlap amount of the coaxial wires 10 in the above-mentioned connection scheme, it is ideal to satisfy the following equation (2).

[0050] S≥0.85d……(2)

[0051] For example, when connecting the coaxial electric wire 10 having an insulating layer with a diameter d of 0.2 mm, it is desirable that the distance S between the center line C1 and the center line C2 is 0.17 mm or more.

[0052] Generally speaking, in a cable with a connector, when connecting an electric wire to a substrate, a pre-processing step of processing the electric wire by laser or the like is required before connection to the substrate in order to expose the central conductor and the outer conductor of the electric wire. For example, the electric wires are arranged in parallel, and a laser is irradiated to the electric wires from the upper surface or the lower surface of the parallel surface, and the irradiation point of the laser is moved in the parallel direction of the electric wires. Thus, the outer skin, the outer conductor or the insulating layer of the parallel electric wires are cut. At this time, when the electric wires connected to the surface of the substrate and the electric wires connected to the back of the substrate are arranged in an overlapping state in the figure observed from above the parallel surface, it is difficult to irradiate all the electric wires with laser by a single laser processing step to cut the desired outer skin, etc. Therefore, the laser irradiation for pre-processing needs to be performed multiple times, and the pre-processing step takes time.

[0053] Therefore, the inventors have found that the number of laser processing times can be reduced by arranging the electric wires so as to reduce the overlap between the electric wires when the cable with a connector is viewed from above the first surface or the second surface.

[0054] Pre-processing of the wire by laser can be performed in the following case: in the figure obtained by observing from the direction perpendicular to the substrate surface, for two adjacent wires connected to different surfaces of the substrate, at least 35% of the width of the cut portion of the wire can be visually identified (in other words, the overlapping portion of the wires at the cut portion is less than or equal to 65% of the width of the portion), and more preferably, more than 85% can be visually identified. For example, when the insulation layer of an insulated wire is cut, the laser pre-processing can be performed when the overlapping portion of the wire is less than or equal to 65% of the width of the insulation layer. In addition, when the outer sheath of a coaxial wire is cut, the laser pre-processing can be performed when the overlapping portion of the wire is less than or equal to 65% of the outer sheath width.

[0055] The cable 1 with connector of the present disclosure arranges the wires in a manner satisfying the above-mentioned formula (1) or formula (2), thereby irradiating the laser to the parts of all the wires that need to be pre-processed without changing the arrangement of the wires. In addition, the overlapping parts of the wires are small, so the number of laser irradiations can be reduced, thereby simplifying the pre-processing of the wires before connection.

[0056] According to the above configuration, it is possible to provide a cable with a connector that can simplify the process of connecting the electric wire to the substrate.

[0057] Furthermore, in the cable 1 with a connector disclosed in the present invention, when a coaxial wire having a center conductor, an insulating layer, an outer conductor, and an outer sheath is used as the wire, the above-mentioned effect is more significant. When the above-mentioned coaxial wire is connected to a substrate, it is necessary to strip the coaxial wire step by step in such a way that the center conductor, the insulating layer, and the outer conductor are exposed in sequence. Therefore, with respect to the coaxial wire, the pre-processing before connecting to the substrate tends to become more complicated. The cable 1 with a connector disclosed in the present invention can simplify the process of connecting the wire to the substrate 4. Therefore, when a coaxial wire 10 that requires multiple processing times before substrate connection is used, the pre-processing process can be particularly simplified.

[0058] It should be noted that, in the cable 1 with a connector of the present disclosure, it is preferred that the electric wires are connected to the first surface 4 a and the second surface 4 b in even number of pairs. Figure 5A It is a cross-sectional view orthogonal to the axial direction of the electric wire and the substrate 4, showing the connection mode of the cable with connector 1 according to the above-mentioned embodiment. Figure 5B and Figure 5C FIG. 1 is a cross-sectional view of the electric wire and the substrate 4 perpendicular to the axial direction, showing another example of the connection method of the cable 1 with a connector of the present disclosure. In the cable 1 with a connector of the present disclosure, when the electric wires are connected in pairs of two and connected to the first surface 4a and the second surface 4b in pairs of an even number, the arrangement of the electric wires can be, for example, FIG. 5A to FIG. 5C Configuration as shown.

[0059] exist Figure 5A In the arrangement of the coaxial wires 10 shown, the coaxial wires 10 of the first group 10a are connected to both ends of the substrate 4 in the width direction in the arrangement direction of the coaxial wires 10 on the first surface 4a of the substrate 4. The coaxial wires 10 of the second group 10b are connected to the center of the substrate 4 in the arrangement direction of the coaxial wires 10 on the second surface 4b of the substrate 4.

[0060] exist Figure 5B In the arrangement of the coaxial wires 10 shown, the coaxial wires 10 of the first group 10a are connected to the left portion, which is one side of the width direction of the substrate 4, in the arrangement direction of the coaxial wires 10 on the first surface 4a of the substrate 4. The coaxial wires 10 of the second group 10b are connected to the right portion, which is different from the end to which the coaxial wires 10 of the first group 10a are connected, in the arrangement direction of the coaxial wires 10 on the second surface 4b of the substrate 4.

[0061] exist Figure 5C In the illustrated arrangement of the coaxial wires 10 , the coaxial wires 10 of the first group 10 a and the coaxial wires 10 of the second group 10 b are alternately connected via the substrate 4 .

[0062] At once FIG. 5A to FIG. 5CFor the configuration shown, the relationship between d and S is S≥d, satisfying equations (1) and (2).

[0063] It should be noted that in Figures 2 to 4 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.

[0064] 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 wires; and a connector connected to the cable, The connector has a substrate, The electric wire has a conductor and an insulating layer covering the conductor, At least a portion of the plurality of electric wires are connected to the substrate in pairs of two adjacent to each other. A portion of the plurality of conductors is connected to the first surface of the substrate, and another portion of the plurality of conductors is connected to the second surface on the back side of the first surface. In a projection diagram of the electric wire observed from a direction orthogonal to the first surface or the second surface, among pairs of electric wires connected to different surfaces and closest to each other as viewed in the projection diagram, an overlapping width of a first group of electric wire pairs connected to the first surface and a second group of electric wire pairs connected to the second surface is smaller than a diameter of the electric wire, When the distance between the center lines of the two electric wires connected to different surfaces and overlapping in the projection diagram is denoted as S, and the diameter of the insulating layer of the electric wire is denoted as d, the relationship of the following formula (1) is satisfied: S≥0.35d……(1).

2. The cable with connector according to claim 1, wherein: The electric wire is a coaxial electric wire having the conductor, an inner insulating layer, an outer conductor covering the inner insulating layer, and the insulating layer covering the outer conductor.

3. The cable with connector according to claim 1 or 2, wherein: In the projection diagram, the diameter d of the insulating layer and the distance S satisfy the relationship of the following formula (2): S≥0.85d……(2).

4. The cable with connector according to claim 1 or 2, wherein: The electrical wires are connected to the first surface and the second surface in even-numbered pairs, respectively.

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