Wire harness

Abstract

To easily bend an electric wire.SOLUTION: A wiring harness W comprises a first electric wire 10, a second electric wire 20 and a connection component 30. The first electric wire 10 has a first core wire 11. The second electric wire 20 has a second core wire 21. The connection component 30 electrically connects the first core wire 11 with the second core wire 21. The connection component 30 has a first connection 31, a second connection 32, and a bellows part 33. The first connection 31 is electrically connected with the first core wire 11. The second connection 32 is electrically connected with the second core wire 21. The bellows part 33 is provided between the first connection 31 and the second connection 32 and has a bellows shape.SELECTED DRAWING: Figure 6

Description

【Technical Field】 【0001】 The present disclosure relates to a wire harness. 【Background Art】 【0002】 Patent Document 1 discloses a coated electric wire. This coated electric wire has a removed portion where the insulating coating is removed. The removed portion has a flattened portion where the conductor portion is flattened. On the outer peripheral surface of the flattened portion, a coating member for maintaining the shape of the flattened portion is provided so as to cover the removed portion. Since the coating member of this coated electric wire maintains the shape of the flattened portion, it has high rigidity and poor flexibility. 【0003】 On the other hand, the electric wire with a shield pipe in Patent Document 2 is easy to bend. This electric wire with a shield pipe includes an electric wire and a shield pipe through which the electric wire is inserted inside. The shield pipe has a bellows shape partially and is easy to bend. 【Prior Art Documents】 【Patent Documents】 【0004】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2015-95280 【Patent Document 2】 Japanese Patent Application Laid-Open No. 2017-143614 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0005】 However, even in the technology of Patent Document 2, the flexibility of the electric wire inserted inside the shield pipe is not considered, and there is room for improvement in this regard. 【0006】 Therefore, the present disclosure provides a technology that enables an electric wire to be easily bent. 【Means for Solving the Problems】 【0007】 The wire harness of this disclosure comprises a first wire having a first core wire, a second wire having a second core wire, and a connecting component for electrically connecting the first core wire to the second core wire, wherein the connecting component has a first connecting portion electrically connected to the first core wire, a second connecting portion electrically connected to the second core wire, and a bellows portion provided between the first connecting portion and the second connecting portion and having a bellows shape. [Effects of the Invention] 【0008】 According to this disclosure, it is possible to make electric wires easier to bend. [Brief explanation of the drawing] 【0009】 [Figure 1] Figure 1 is a schematic diagram showing the configuration of the wire harness of Embodiment 1. [Figure 2] Figure 2 is a cross-sectional view of the connecting component. [Figure 3] Figure 3 is a plan view of the first and second electric wires. [Figure 4] Figure 4 is a cross-sectional view showing the state in which the connecting components are connected to the first and second electric wires. [Figure 5] Figure 5 is a cross-sectional view showing the state in which a waterproofing agent has been applied to the gap between the first wire and the connecting component, and the gap between the second wire and the connecting component. [Figure 6] Figure 6 is a cross-sectional view showing the state in which the outer circumference of the water-stopping agent is covered with heat-shrink tubing. [Figure 7] Figure 7 is a schematic diagram showing the configuration of the wire harness of Embodiment 2. [Figure 8] Figure 8 is a diagram corresponding to Figure 6 of Embodiment 3. [Modes for carrying out the invention] 【0010】 [Description of Embodiments in this Disclosure] First, the embodiments of this disclosure will be listed and described. 【0011】 The wire harness in this disclosure is (1) A first electric wire having a first core wire, a second electric wire having a second core wire, and a connecting component for electrically connecting the first core wire to the second core wire, wherein the connecting component includes a first connecting portion electrically connected to the first core wire, a second connecting portion electrically connected to the second core wire, and a bellows portion provided between the first connecting portion and the second connecting portion and having a bellows shape. 【0012】 According to this configuration, since a bellows portion is provided between the first core wire and the second core wire, the portion between the first core wire and the second core wire is easily bent. Therefore, according to this configuration, it is possible to make the electric wire composed of the first electric wire, the second electric wire, and the connecting component easily bendable. 【0013】 (2) The first connecting portion, the second connecting portion, and the bellows portion may be constituted by a cylindrical conductive portion electrically connected to both the first core wire and the second core wire, and an insulating portion provided on the outer side in the radial direction of the conductive portion. 【0014】 According to this configuration, the first core wire can be electrically connected to the second core wire by the conductive portion, and the conductive portion can be electrically insulated from the outside by the insulating portion. 【0015】 (3) In the configuration of (2), the first electric wire has a first insulating coating covering the outer periphery of the first core wire, the second electric wire has a second insulating coating covering the outer periphery of the second core wire, the first core wire has a first exposed portion exposed from the first insulating coating at one end of the first electric wire, the second core wire has a second exposed portion exposed from the second insulating coating at one end of the second electric wire, the first connecting portion may be electrically connected to the first exposed portion, and the second connecting portion may be electrically connected to the second exposed portion. 【0016】 According to this configuration, a configuration for electrically connecting the first core wire to the second core wire can be realized by a configuration in which the first connecting portion is electrically connected to the first exposed portion and the second connecting portion is electrically connected to the second exposed portion. 【0017】 (4) In the configuration of (3) above, the first connection part may be crimped to the first exposed part, and the second connection part may be crimped to the second exposed part. 【0018】 According to this configuration, the first connection part can be connected to the first exposed part by crimping, and the second connection part can be connected to the second exposed part. 【0019】 (5) The wire harness may include a waterstop agent that fills a gap between at least one of the first wire and the second wire and the connection component. 【0020】 According to this configuration, the waterstop agent can suppress water ingress into the above gap. 【0021】 (6) In the configuration of (5) above, a shrink tube that covers the outer periphery of the waterstop agent may be provided. 【0022】 According to this configuration, due to the shrinking force of the shrink tube, the waterstop agent adheres tightly to at least one of the above and the connection component, so the effect of suppressing water ingress by the waterstop agent can be improved. 【0023】 (7) The wire harness may include a shrink tube with an adhesive, which is a configuration in which an adhesive is applied to the shrink tube. The shrink tube with an adhesive may be adhered to at least one of the first wire and the second wire and the connection component, and may be arranged in a state of filling the gap between at least one of the above and the connection component. 【0024】 According to this configuration, the shrink tube with an adhesive can suppress water ingress into the above gap. 【0025】 [Details of Embodiments of the Present Disclosure] Specific examples of the present disclosure will be described below with reference to the drawings. It should be noted that the present invention is not limited to these examples, and is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. 【0026】 <Embodiment 1> (Wire harness configuration) Figure 1 discloses a wire harness W of Embodiment 1. As shown in Figure 1, the wire harness W comprises a first wire 10, a second wire 20, and a connecting component 30. 【0027】 The first electric wire 10 is configured as an insulated electric wire. As shown in Figure 3, the first electric wire 10 has a first core wire 11 and a first insulating sheath 12. The first core wire 11 is conductive. The outer surface of the first core wire 11 is covered by the first insulating sheath 12, except for the ends. The first core wire 11 has a first exposed portion 13 in which the outer surface is exposed from one end of the first insulating sheath 12. The first exposed portion 13 is provided at one end of the first core wire 11. The first insulating sheath 12 is cylindrical. 【0028】 The second electric wire 20 is constructed as an insulated electric wire. As shown in Figure 3, the second electric wire 20 has a second core wire 21 and a second insulating sheath 22. The second core wire 21 is conductive. The outer surface of the second core wire 21 is covered by the second insulating sheath 22, except for the ends. The second core wire 21 has a second exposed portion 23 in which the outer surface is exposed from one end of the second insulating sheath 22. The second exposed portion 23 is provided at one end of the second core wire 21. The second insulating sheath 22 is cylindrical. 【0029】 The connecting component 30 is a component that electrically connects the first core wire 11 to the second core wire 21. As shown in Figure 2, the connecting component 30 has a first connecting portion 31, a second connecting portion 32, and a bellows portion 33. 【0030】 As shown in Figure 4, the first connecting portion 31 is provided at one end of the connecting component 30 and connected to the first electric wire 10. The first connecting portion 31 is cylindrical in shape and is crimped onto the first exposed portion 13, which is inserted through an opening at one end of the first connecting portion 31. 【0031】 As shown in Figure 4, the second connecting portion 32 is provided at the other end of the connecting component 30 and is connected to the second electric wire 20. The second connecting portion 32 is cylindrical in shape and is crimped onto the second exposed portion 23, which is inserted through an opening at one end of the second connecting portion 32. 【0032】 As shown in Figure 2, the bellows section 33 is provided between the first connecting section 31 and the second connecting section 32. The bellows section 33 has a bellows shape. A bellows shape is a shape in which the cross-section cut in the axial direction is corrugated or has repeating indentations and protrusions. The bellows section 33 is expandable and flexible. The bellows section 33 bends when, in a direction perpendicular to the axial direction, one side of the corrugated or indented shape stretches and the other side of the corrugated or indented shape contracts. 【0033】 The first connection section 31, the second connection section 32, and the bellows section 33 are composed of a conductive section 40 and an insulating section 41, as shown in Figure 4. The conductive section 40 is electrically connected to both the first core wire 11 and the second core wire 21. The conductive section 40 is cylindrical. The conductive section 40 is made of, for example, metal and is plate-shaped. The insulating section 41 is provided radially outside the conductive section 40. The insulating section 41 is cylindrical. The insulating section 41 is bonded to the conductive section 40. The film thickness of the insulating section 41 is smaller than the plate thickness of the conductive section 40. 【0034】 As shown in Figure 6, the wire harness W includes a waterproofing agent 50 and a heat-shrinkable tube 51. The waterproofing agent 50 is insulating. Examples of waterproofing agents 50 include silicone resin, grease, butyl rubber, epoxy resin, acrylic resin, thermoplastic resin, and other adhesives having viscosity and elasticity. In this embodiment, a silicone resin that hardens upon drying is used. The waterproofing agent 50 is provided in two locations. One waterproofing agent 50 fills the gap between the first wire 10 and the connecting component 30 (more specifically, the first connecting portion 31). The other waterproofing agent 50 fills the gap between the second wire 20 and the connecting component 30 (more specifically, the second connecting portion 32). 【0035】 The heat-shrinkable tube 51 is, for example, a heat-shrinkable tube. The heat-shrinkable tube 51 is made of, for example, a thermoplastic resin. The heat-shrinkable tube 51 is insulating. The heat-shrinkable tube 51 is cylindrical in shape. The heat-shrinkable tube 51 is obtained, for example, by extruding a resin member into a very thin cylindrical shape, which is then stretched into a thick cylindrical shape while heated and then cooled. The heat-shrinkable tube 51 obtained in this way has shape memory properties, which cause it to shrink back to its original thin cylindrical shape when heated. Two heat-shrinkable tubes 51 are provided. Each heat-shrinkable tube 51 covers the outer circumference of each water-stopping agent 50. 【0036】 As shown in Figure 1, the wire harness W includes a first connector 61 and a second connector 62. The first connector 61 is insulating. The first connector 61 is made of synthetic resin. The other end of the first electric wire 10 is connected to the first connector 61. The second connector 62 is insulating. The second connector 62 is made of synthetic resin. The other end of the second electric wire 20 is connected to the second connector 62. 【0037】 As shown in Figure 1, the wire harness W comprises a shielding member 63, a first connecting member 64, and a second connecting member 65. The shielding member 63 is conductive and cylindrical in shape. The shielding member 63 is made of braided wire. The shielding member 63 covers a plurality of first wires 10, a plurality of second wires 20, and a plurality of connecting components 30. One end of the shielding member 63 is connected to the outer surface of the first connector 61 by the first connecting member 64. The other end of the shielding member 63 is connected to the outer surface of the second connector 62 by the second connecting member 65. 【0038】 As shown in Figure 1, the wire harness W comprises an outer covering member 66, a first protective member 67, and a second protective member 68. The outer covering member 66 is insulating and cylindrical in shape. The outer covering member 66 is flexible and, for example, is configured as a corrugated tube. The outer covering member 66 covers the outer circumference of the shield member 63. One end of the outer covering member 66 is fixed to the first connector 61 via the first protective member 67. The other end of the outer covering member 66 is fixed to the second connector 62 via the second protective member 68. The first protective member 67 and the second protective member 68 are insulating and cylindrical in shape. The first protective member 67 is fixed to the outer surface of the first connector 61 while covering the first connecting member 64. The second protective member 68 is fixed to the outer surface of the second connector 62 while covering the second connecting member 65. 【0039】 (Method of manufacturing a wire harness) The connecting component 30 of the wire harness W is manufactured, for example, as follows. First, a cylindrical member made of metal (e.g., aluminum) is manufactured. The cylindrical member is compressed from the radially outer side so that a bellows shape is formed. This forms the conductive portion 40 of the connecting component 30. The outer surface of the conductive portion 40 is painted with an insulating paint. This forms an insulating layer consisting of an insulating portion 41 on the outer surface of the conductive portion 40. In this way, the connecting component 30 is manufactured. Note that the manufacturing method of the connecting component 30 is not limited to this method. For example, the conductive portion 40 may be formed by casting. 【0040】 The first wire 10 and the second wire 20 are formed by removing the insulating coating from one end of a covered wire, exposing the outer surface of one end of the core wire (see Figure 3). As shown in Figure 4, the first exposed portion 13 of the first core wire 11 is inserted into the first connecting portion 31 of the connecting component 30 from one end of the connecting component 30. The first connecting portion 31 is crimped to the first exposed portion 13. The second exposed portion 23 of the second core wire 21 is inserted into the second connecting portion 32 of the connecting component 30 from the other end of the connecting component 30. The second connecting portion 32 is crimped to the second exposed portion 23. At this time, the first core wire 11 and the second core wire 21 are spaced apart from each other. As a result, a space is formed inside the bellows section 33. Therefore, even when the bellows section 33 is bent, the inner surface of the bellows section 33 does not interfere with the first core wire 11 and the second core wire 21, making the bellows section 33 easy to bend. 【0041】 As shown in Figure 5, the waterproofing agent 50 is applied to fill the gap between the first wire 10 and the connecting part 30, and the gap between the second wire 20 and the connecting part 30. Then, as shown in Figure 6, heat-shrink tubing 51 is attached to cover the outer circumference of each waterproofing agent 50. By attaching the heat-shrink tubing 51, the waterproofing agent 50 adheres tightly to the first wire 10, the second wire 20, and the connecting part 30, more reliably filling the gaps between the components. 【0042】 Subsequently, the cylindrical shield member 63 is inserted from the other end of the first wire 10 or the other end of the second wire 20 so as to cover the outer circumference of the first wire 10, the second wire 20, and the connecting component 30. In Figure 1, two bellows-type wires 70, which are composed of the first wire 10, the second wire 20, and the connecting component 30, are inserted inside the shield member 63. The cylindrical outer casing member 66 is inserted so as to cover the outer circumference of the shield member 63. 【0043】 The other end of each first wire 10 is connected to the first connector 61, and the other end of each second wire 20 is connected to the second connector 62. One end of the shield member 63 is connected to the outer surface of the first connector 61 by a first connecting member 64, and the other end is connected to the outer surface of the second connector 62 by a second connecting member 65. One end of the outer casing member 66 is fixed to the first connector 61 via a first protective member 67, and the other end of the outer casing member 66 is fixed to the second connector 62 via a second protective member 68. In this way, the wire harness W is manufactured. 【0044】 When the wire harness W is not elastically deformed, it has a straight, linear shape. The wire harness W bends at the point where the connecting component 30 is provided, resulting in the state shown in Figure 1. When the connecting component 30 is bent, the wire harness W attempts to return to its original shape due to its own elastic force. The wire harness W is held in its bent state by being fixed to a vehicle body panel (not shown). 【0045】 (Examples of the effects of wire harnesses) With the wire harness W, a bellows section 33 is provided between the first core wire 11 and the second core wire 21, making the section between the first core wire 11 and the second core wire 21 easier to bend. Therefore, with the wire harness W, the wire composed of the first wire 10, the second wire 20, and the connecting component 30 can be easily bent. 【0046】 Furthermore, the first connection part 31, the second connection part 32, and the bellows part 33 are each composed of a cylindrical conductive part 40 that is electrically connected to both the first core wire 11 and the second core wire 21, and an insulating part 41 provided radially outside the conductive part 40. With this configuration, the conductive part 40 electrically connects the first core wire 11 to the second core wire 21, and the insulating part 41 electrically insulates the conductive part 40 from the outside. 【0047】 Furthermore, with the wire harness W, a configuration is achieved in which the first core wire 11 is electrically connected to the second core wire 21 by having the first connection part 31 electrically connected to the first exposed part 13 and the second connection part 32 electrically connected to the second exposed part 23. 【0048】 Furthermore, with the wire harness W, the first connection part 31 can be connected to the first exposed part 13 by crimping, and the second connection part 32 can be connected to the second exposed part 23. 【0049】 Furthermore, with the wire harness W, water ingress into the gap between the first wire 10 and the connecting component 30, and water ingress into the gap between the second wire 20 and the connecting component 30 can be suppressed by the water-stopping agent 50. 【0050】 Furthermore, with the wire harness W, the shrinking force of the heat shrink tube 51 causes the water-sealing agent 50 to adhere tightly to the first wire 10, the second wire 20, and the connecting part 30, thereby improving the water-sealing effect of the water-sealing agent 50. 【0051】 <Embodiment 2> Embodiment 1 described an example in which all the wires inserted inside the shield member are bellows-type wires. However, some of the wires inserted inside the shield member do not need to be bellows-type wires. Embodiment 2 describes an example in which non-bellows-type wires are inserted inside the shield member. In the following description, the same reference numerals are used for components identical to those in Embodiment 1, and detailed explanations are omitted. 【0052】 As shown in Figure 7, the wire harness W2 of Embodiment 2 comprises a bellows-type wire 70, a waterproofing agent 50, a heat shrink tube 51, a non-bellows-type wire 71, a first connector 61, a second connector 62, a shielding member 63, a first connecting member 64, a second connecting member 65, an outer covering member 66, a first protective member 67, and a second protective member 68. 【0053】 The wire without bellows 71 is constructed as an insulated wire. One end of the wire without bellows 71 is connected to the first connector 61, and the other end of the wire without bellows 71 is connected to the second connector 62. As shown in Figure 7, the wire with bellows 70 has a bent connector 30, while the wire without bellows 71 is bent outside the bent connector 30. If the wire with bellows 70 is placed outside the wire without bellows 71, the curvature of the wire with bellows 70 cannot be made greater than the curvature of the wire without bellows 71. Therefore, the overall curvature of the wire harness W2 will also be small. In contrast, if the wire with bellows 70 is placed inside the wire without bellows 71, the curvature of the wire with bellows 70 can be made greater than the curvature of the wire without bellows 71. Therefore, with this configuration, the overall curvature of the wire harness W2 can be increased. 【0054】 <Embodiment 3> In Embodiment 1, the wire harness was configured to include a waterproofing agent and heat-shrink tubing. In contrast, Embodiment 3 describes a configuration in which the wire harness is equipped with adhesive-backed heat-shrink tubing instead of a waterproofing agent and heat-shrink tubing. In the following description, components identical to those in Embodiment 1 are denoted by the same reference numerals, and detailed explanations are omitted. 【0055】 As shown in Figure 8, the wire harness of Embodiment 3 comprises a first wire 10, a second wire 20, a connecting component 30, and an adhesive-backed heat-shrink tubing 350. 【0056】 The adhesive-backed heat-shrink tubing 350 has a structure in which a water-sealing agent 50 is applied to the inside of the heat-shrink tubing 51 described in Embodiment 1. Two adhesive-backed heat-shrink tubings 350 are provided. One adhesive-backed heat-shrink tubing 350 is bonded to the first electric wire 10 and the connecting component 30, and is positioned to fill the gap between the first electric wire 10 and the connecting component 30. The other adhesive-backed heat-shrink tubing 350 is bonded to the second electric wire 20 and the connecting component 30, and is positioned to fill the gap between the second electric wire 20 and the connecting component 30. With this configuration, the adhesive-backed heat-shrink tubing 350 can suppress water ingress into the gap between the first electric wire 10 and the connecting component 30, and into the gap between the second electric wire 20 and the connecting component 30. 【0057】 [Other embodiments of this disclosure] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. (1) In each of the above embodiments, the wire harness had an insulating coating applied to the outer surface of a cylindrical conductive part, but it may have a different configuration. For example, the wire harness may have a metal foil coating applied to the inner surface of a resin-molded cylindrical insulating part. Alternatively, the wire harness may have an insulating part provided on the outer surface of a cylindrical conductive part by two-color molding. (2) In each of the above embodiments, the first connecting portion was cylindrical, but it may have a different configuration. For example, the first connecting portion may be open barrel-shaped. The first connecting portion was crimped to the first core wire, but it may be electrically connected to the first core wire by other means. For example, the first connecting portion may be welded to the first core wire by a method such as ultrasonic bonding. The second connecting portion is the same as the first connecting portion. (3) In Embodiment 1 described above, the wire harness was configured to suppress water ingress with a water-sealing agent and a heat-shrink tube, but it may also be configured to suppress water ingress with a water-sealing agent alone. [Explanation of symbols] 【0058】 10...First power line 11…First core wire 12...First insulating coating 13...First exposed part 20... Second power line 21...Second core wire 22...Second insulating coating 23…Second exposed part 30…Connecting parts 31...First connection section 32...Second connection section 33... Bellows 40...Conductive part 41...Insulation 50...Water-stopping agent 51... Heat shrink tubing 61…First connector 62…Second connector 63... Shielding component 64…First connecting member 65...Second connecting member 66… Exterior components 67…First protective member 68…Second protective member 70... Corrugated wire 71...Non-corrugated power lines 350... Heat shrink tubing with adhesive W...Wire harness W2…Wire harness

Claims

[Claim 1] A first electric wire having a first core wire, A second electric wire having a second core wire, The system includes a connecting component that electrically connects the first core wire to the second core wire, The connecting component has a first connecting portion electrically connected to the first core wire, a second connecting portion electrically connected to the second core wire, and a bellows-shaped bellows portion provided between the first connecting portion and the second connecting portion, and is cylindrical in shape. The first electric wire has a first insulating coating that covers the outer circumference of the first core wire, The second electric wire has a second insulating coating that covers the outer circumference of the second core wire, The first core wire has a first exposed portion exposed from the first insulating coating at one end of the first electric wire, The second core wire has a second exposed portion at one end of the second electric wire that is exposed from the second insulating coating, The first connection portion is electrically connected to the first exposed portion, The second connection portion is a wire harness electrically connected to the second exposed portion. [Claim 2] The wire harness according to claim 1, further comprising a water-sealing agent for filling the gap between at least one of the first wire and the second wire and the connecting component. [Claim 3] The wire harness according to claim 2, further comprising a heat-shrinkable tube covering the outer circumference of the water-stopping agent. [Claim 4] The device includes an adhesive-coated heat-shrink tube, which has an adhesive applied to the heat-shrink tube. The wire harness according to any one of claims 1 to 3, wherein the heat-shrinkable tube with adhesive is bonded to at least one of the first wire and the second wire and the connecting component, and is positioned to fill the gap between the at least one and the connecting component.

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