Wire harness

Abstract

To provide a wire harness having high waterproofness.SOLUTION: A wire harness 1 includes: first and second insulated electric wires 11 and 12 whose central conductors 111 and 121 are respectively covered with insulation coatings 112 and 122 composed of an insulating resin; a sheath 15 collectively covering the first and second insulated electrical wires 11 and 12; and a resin holding member 2 including a body 20 that holds an end portion of the sheath 15 together with a part of the first and second insulated electrical wires 11 and 12 in a longitudinal direction. The holding member 2 includes a first leadout part 21 that is protruded from the body 20 and leads out the first and second insulated electrical wires 11 and 12. The first leadout part 21 is covered with a contracted heat-shrinkable tube 8 together with the first and second insulated electrical wires 11 and 12.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a wire harness including a resin holding member that holds an end of a sheath together with a portion of a plurality of insulated wires in the longitudinal direction. [Background technology]

[0002] BACKGROUND ART Conventionally, a wire harness equipped with a protective tube for protecting electric wires has been known as a wire harness mounted on a vehicle (see, for example, Patent Document 1).

[0003] The wire harness described in Patent Document 1 includes a parking brake electric wire that supplies operating power to an electric parking brake device, a sensor electric wire that transmits detection signals from an ABS (antilock braking system) sensor, a tubular sheath that collectively covers the parking brake electric wire and the sensor electric wire, a branch section fixing member that covers a portion of the parking brake electric wire and the sensor electric wire that are led out from the ends of the sheath, a first protective tube that covers the parking brake electric wire, and a second protective tube that covers the sensor electric wire. One end of the first protective tube and the second protective tube are fastened to the outer periphery of the branch section fixing member by a fastening member. The other end of the first protective tube is fastened to the outer periphery of a connector provided at the tip of the parking brake electric wire by the fastening member, and the other end of the second protective tube is fastened to the outer periphery of a connector provided at the tip of the sensor electric wire by the fastening member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2020-137194 Summary of the Invention [Problem to be solved by the invention]

[0005] In the wire harness described in Patent Document 1, the first and second protective tubes protect the parking brake wire and the sensor wire from damage caused by flying stones and the like, and also protect them from water intrusion into the sheath. However, for example, in a vehicle that is expected to be continuously driven on rough roads such as gravel roads with puddles, higher waterproofing may be required. Therefore, an object of the present invention is to provide a wire harness with high waterproofing. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention provides a wire harness comprising: a plurality of insulated wires, each having a central conductor covered with an insulating coating made of an insulating resin; a sheath that covers the plurality of insulated wires collectively; and a resin holding member having a main body that holds an end of the sheath together with a longitudinal portion of the plurality of insulated wires, wherein the plurality of insulated wires are led out from the holding member, and the holding member has lead-out portions that protrude from the main body and lead out the plurality of insulated wires, and the lead-out portions of the holding member, together with the plurality of insulated wires, are covered with a shrunk heat-shrink tube. [Effects of the Invention]

[0007] According to the present invention, a wire harness having high waterproof properties can be provided. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an external view of a wire harness according to an embodiment of the present invention; [Figure 2] 2(a) is a cross-sectional view of the wire harness shown in FIG. 1, and FIG. 2(b) is a partially enlarged view of FIG. [Figure 3] 2(a), (b), (c), and (d) are cross-sectional views taken along lines AA, BB, CC, and DD in FIG. 1. [Figure 4] 1(a) and 1(b) are cross-sectional views showing the states of a heat-shrinkable tube before and after heat shrinkage. [Figure 5] FIG. 10 is a cross-sectional view showing a first modified example in which a plurality of circumferential grooves are formed on the outer peripheral surface of the small diameter portion of the first lead-out portion. [Figure 6] 10 is a cross-sectional view showing a second modification in which the outer diameter of the small diameter portion of the first lead-out portion is reduced and the insulating coatings of the first and second insulated wires are partly exposed from the outer circumferential surfaces of the small diameter portion. FIG. [Figure 7] FIG. 10 is a cross-sectional view showing a third modified example in which a space for storing a solid hot melt adhesive is formed in the first outlet portion. [Figure 8] FIG. 10 is a cross-sectional view showing a fourth modified example in which the protective tube is fixed by an adhesive tape instead of the first fastening member. [Figure 9] FIG. 10 is a cross-sectional view showing a fifth modified example in which a portion including the first lead-out portion is made of an injection-molded resin member, and the holding member is formed by molding including this resin member. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Embodiment Mode] Fig. 1 is an external view of a wire harness according to an embodiment of the present invention. Fig. 2(a) is a cross-sectional view of the wire harness, and Fig. 2(b) is a partially enlarged view of Fig. 2(a). Figs. 3(a), (b), (c), and (d) are cross-sectional views taken along lines AA, BB, CC, and DD in Fig. 1.

[0010] This wire harness 1 includes first to fourth insulated wires 11 to 14, a sheath 15 that collectively covers the first to fourth insulated wires 11 to 14, an inner sheath 16 that covers the third and fourth insulated wires 13, 14, a retaining member 2 provided at the end of the sheath 15, a connector portion 3 provided at the tip ends of the first and second insulated wires 11, 12, a sensor portion 4 provided at the tip ends of the third and fourth insulated wires 13, 14, a bracket 5 as a fixing device attached to the retaining member 2, a protective tube 6 that covers the first and second insulated wires 11, 12 between the retaining member 2 and the connector portion 3, first and second fastening members 71, 72 that fasten both ends of the protective tube 6, and a heat-shrinkable tube 8 arranged inside the protective tube 6.

[0011] The first to fourth insulated wires 11 to 14 have central conductors 111, 121, 131, and 141 made of a highly conductive metal, and insulating coatings 112, 122, 132, and 142 made of an insulating resin that coat the central conductors 111, 121, 131, and 141, respectively. The central conductors 111, 121, 131, and 141 are, for example, stranded wires formed by stranding a plurality of wires. The first and second insulated wires 11 and 12 are thicker than the third and fourth insulated wires 13 and 14.

[0012] The first and second insulated electric wires 11, 12 are, for example, parking brake electric wires that supply operating power to an electric parking brake device of a vehicle. The connector unit 3 has a resin connector housing 31, a plurality of metal connector pins 32, and a rubber cap 33 held by the connector housing 31, and is fitted to a connector of the electric parking brake device. Center conductors 111, 121 of the first and second insulated electric wires 11, 12 are connected to the plurality of connector pins 32, respectively. The first and second insulated electric wires 11, 12 are inserted into the cap 33.

[0013] The sensor unit 4 is, for example, an ABS sensor that outputs a pulse signal with a period corresponding to the rotational speed of the wheel, and is attached opposite a magnetic encoder provided on a hub that supports the wheel. The third and fourth insulated wires 13 and 14 are signal wires that transmit the output signal of the sensor unit 4, and are connected to a magnetic sensor 42, which is the detection unit of the sensor unit 4, inside a resin sensor housing 41. The third and fourth insulated wires 13 and 14 and the inner sheath 16 constitute a signal line cable 10.

[0014] The first and second insulated wires 11, 12 and the signal cable 10 are twisted together in a spiral shape inside the sheath 15. A bind tape 17 is wound around the outer periphery of the first and second insulated wires 11, 12 and the signal cable 10 (see FIG. 3(a)).

[0015] The holding member 2 is fixed to a fixed object such as a vehicle body via a bracket 5. The holding member 2 integrally includes a main body 20 that holds the end of the sheath 15 together with a longitudinal portion of the first and second insulated wires 11, 12 and a longitudinal portion of the signal cable 10, a first lead-out portion 21 from which the first and second insulated wires 11, 12 are led out, and a second lead-out portion 22 from which the signal cable 10 is led out. The main body 20 of the holding member 2 covers the end of the sheath 15 and the portions of the first and second insulated wires 11, 12 and the signal cable 10 led out from the end of the sheath 15. The second lead-out portion 22 is formed in a cylindrical shape that surrounds the signal cable 10.

[0016] The first lead-out portion 21 has a large diameter portion 211 and a small diameter portion 212 with different outer diameters, and the small diameter portion 212 is provided closer to the main body portion 20 than the large diameter portion 211. In this embodiment, a boss portion 213 is provided closer to the main body portion 20 than the small diameter portion 212, and the outer diameter of the boss portion 213 is formed to be larger than the outer diameter of the small diameter portion 212. However, the boss portion 213 does not necessarily have to be provided. In other words, the small diameter portion 212 may be formed continuously with the main body portion 20.

[0017] The first and second insulated wires 11, 12 and the signal cable 10 branch off inside the holding member 2 and are led out from first and second lead-out portions 21, 22 of the holding member 2 in different directions. In this embodiment, the first and second insulated wires 11, 12 are led out from the holding member 2 along the axial direction of the sheath 15 inside the holding member 2. The signal cable 10 is led out from the holding member 2 in a direction inclined with respect to the axial direction of the sheath 15 inside the holding member 2. The first lead-out portion 21 is provided to protrude from the main body portion 20 so as to follow the first and second insulated wires 11, 12. The second lead-out portion 22 is provided to protrude from the main body portion 20 so as to follow the signal cable 10.

[0018] The retaining member 2 is made of a molded resin. The sheath 15 and the inner sheath 16 are made of a resin that is highly compatible (dissolving in each other) with the molded resin of the retaining member 2. As an example, the retaining member 2 is made of PBT (polybutylene terephthalate), and the sheath 15 and the inner sheath 16 are made of TPU (thermoplastic polyurethane elastomer). As another example, the retaining member 2, the sheath 15, and the inner sheath 16 are all made of the same resin material, such as TPU. The retaining member 2 and the sheath 15, and the retaining member 2 and the inner sheath 16, are fused together by the heat of the molded resin when the retaining member 2 is molded, thereby preventing water from penetrating between the retaining member 2 and the sheath 15, and between the retaining member 2 and the inner sheath 16. Note that a compatibilizer may be added to the sheath 15 and the inner sheath 16 to improve the compatibility between the retaining member 2 and the sheath 15 and the inner sheath 16.

[0019] The insulating coatings 112, 122, 132, and 142 of the first to fourth insulated wires 11 to 14 are made of a resin such as cross-linked polyethylene, which has excellent electrical insulation properties but relatively low compatibility with the molded resin of the holding member 2. The intrusion of water from around the third and fourth insulated wires 13 and 14 into the inside of the sheath 15 is prevented by the inner sheath 16 and the holding member 2 being fused together. On the other hand, the intrusion of water from around the first and second insulated wires 11 and 12 into the inside of the sheath 15 is prevented by the protective tube 6, the first and second fastening members 71 and 72, and the heat-shrinkable tube 8. Next, the waterproof structure provided by the protective tube 6, the first and second fastening members 71 and 72, and the heat-shrinkable tube 8 will be described in detail.

[0020] The protective tube 6 is made of a flexible tubular resin and covers the first and second insulated wires 11, 12 led out from the first lead-out portion 21 of the holding member 2. One end of the protective tube 6 is fastened to the first lead-out portion 21 by a first fastening member 71 at a position corresponding to the outer circumferential side of the small diameter portion 212. The other end of the protective tube 6 is fastened to the connector housing 31 by a second fastening member 72.

[0021] 3(c), the first fastening member 71 has a strip-shaped portion 711, a locking head 712 provided at one end of the strip-shaped portion 711, and a locking claw 713 provided on the locking head 712. An insertion hole 710 is formed in the locking head 712, through which the other end of the strip-shaped portion 711 is inserted, and the locking claw 713 protrudes into the insertion hole 710. The first fastening member 71 maintains a state in which one end of the protective tube 6 is fastened by the locking claw 713 locking the other end of the strip-shaped portion 711.

[0022] 4(a) and (b) are cross-sectional views showing the heat-shrinkable tube 8 before and after it is thermally shrunk. The heat-shrinkable tube 8 is a cylindrical member made of a resin material such as polyolefin or polyvinyl chloride. It is disposed on the outer periphery of the first outlet portion 21 and shrinks primarily in the radial direction when heated. In this embodiment, a heat-shrinkable tube 8 is used with a hot-melt adhesive 80 applied to its inner surface. The hot-melt adhesive 80 is made of a thermoplastic plastic such as ethylene vinyl acetate (EVA), and becomes liquid when heated together with the heat-shrinkable tube 8. When the temperature drops, it solidifies, bonding the heat-shrinkable tube 8 to the first outlet portion 21.

[0023] The first lead-out portion 21, together with the first and second insulated electric wires 11 and 12, is covered by the shrunk heat-shrinkable tube 8. The heat-shrinkable tube 8 covers the entire large-diameter portion 211 and at least a part of the small-diameter portion 212 of the first lead-out portion 21. The hot-melt adhesive 80 is interposed between the first lead-out portion 21 and the heat-shrinkable tube 8 and between the first and second insulated electric wires 11 and 12 and the heat-shrinkable tube 8, and prevents water from entering the inside of the first lead-out portion 21. The hot-melt adhesive 80 is also interposed between the first insulated electric wire 11 and the second insulated electric wire 12, and prevents water from entering the inside of the first lead-out portion 21 from between the first insulated electric wire 11 and the second insulated electric wire 12.

[0024] (Actions and Effects of the Embodiments) According to the embodiment described above, the following actions and effects can be obtained. (1) Since the first lead-out portion 21 of the holding member 2 is covered with the heat-shrinkable tube 8 together with the first and second insulated wires 11 and 12, the infiltration of water into the inside of the first lead-out portion 21 is prevented. (2) Since the heat-shrinkable tube 8 covers the entire large diameter portion 211 and at least a portion of the small diameter portion 212 of the first outlet portion 21, the heat-shrinkable tube 8 is engaged with the large diameter portion 211 and is prevented from slipping out of the first outlet portion 21. (3) Since the protective tube 6 is fastened by the first fastening member 71 at a position that contacts the outer periphery of the small diameter portion 212 of the first outlet portion 21 , the protective tube 6 is unlikely to come off from the first outlet portion 21 . (4) Since the hot melt adhesive 80 is interposed between the first lead-out portion 21 and the first and second insulated electric wires 11, 12 and the heat shrink tube 8, displacement of the heat shrink tube 8 is suppressed and waterproofing is improved. (5) In the signal cable 10, the third and fourth insulated wires 13, 14 are covered with the inner sheath 16 made of a resin that is highly compatible with the holding member 2, so that water is prevented from penetrating into the inside of the sheath 15 from around the third and fourth insulated wires 13, 14.

[0025] [Variations] Next, first to fifth modifications of the embodiment will be described with reference to FIGS.

[0026] (Variation 1) Fig. 5(a) is a cross-sectional view showing Modification 1 in which a plurality of circumferential grooves 212b extending in the circumferential direction are formed on the outer circumferential surface 212a of the small diameter portion 212 of the first lead-out portion 21. Fig. 5(b) is a partial enlarged view of Fig. 5(a). In the example shown in Figs. 5(a) and 5(b), four circumferential grooves 212b are formed side by side at equal intervals along the axial direction of the first lead-out portion 21. Each circumferential groove 212b is formed in an annular shape around the entire circumference of the small diameter portion 212. Note that the circumferential groove 212b may be formed in a spiral shape.

[0027] According to this first modification, the molten hot melt adhesive 80 enters the multiple circumferential grooves 212b, and at least a portion of the outer circumferential surface 212a of the small diameter portion 212 where the circumferential grooves 212b are not formed comes into contact with the inner circumferential surface 8a of the heat-shrinkable tube 8. Then, the frictional force between the outer circumferential surface 212a of the small diameter portion 212 and the inner circumferential surface 8a of the heat-shrinkable tube 8 suppresses axial movement of the heat-shrinkable tube 8 when the heat-shrinkable tube 8 thermally shrinks, i.e., suppresses axial shrinkage of the heat-shrinkable tube 8. This allows at least a portion of the small diameter portion 212 to be reliably covered by the heat-shrinkable tube 8 without making the length of the small diameter portion 212 too long.

[0028] (Variation 2) FIG. 6(a) is a cross-sectional view showing Modification 2 in which the outer diameter of the small diameter portion 212 is reduced and parts of the insulating coatings 112, 122 of the first and second insulated wires 11, 12 are exposed from the outer circumferential surface 212a of the small diameter portion 212. FIG. 6(b) is a cross-sectional view taken along line EE in FIG. 6(a). FIG. 6(c) is a cross-sectional view taken along line FF in FIG. 6(a). In addition, in Modification 2, as the diameter of the small diameter portion 212 is reduced, the outer diameters of the large diameter portion 211 and the boss portion 213 are also formed smaller than in the above embodiment. Even when the diameter of the first lead-out portion 21 is reduced in this way, the same effects as in the above embodiment can be obtained.

[0029] (Variation 3) 7 is a perspective cross-sectional view showing Modification 3 in which a space 210 for accommodating a solid hot-melt adhesive 800 is formed between the inner circumferential surface 21a of the first lead-out portion 21 at the end on the side where the first and second insulated wires 11, 12 are led out of the holding member 2 and the first and second insulated wires 11, 12. The hot-melt adhesive 800 is cylindrical in its solid state before melting, and melts together with the hot-melt adhesive 80 applied to the inner surface of the heat-shrinkable tube 8 due to the heat generated when the heat-shrinkable tube 8 is shrunk, and solidifies while interposed between the heat-shrinkable tube 8 and the first and second insulated wires 11, 12. This further improves the waterproofing between the heat-shrinkable tube 8 and the first and second insulated wires 11, 12.

[0030] (Variation 4) 8 is a cross-sectional view showing Modification 4 in which the protective tube 6 is fixed to the first outlet portion 21 of the holding member 2 by an adhesive tape 9 instead of the first fastening member 71. The adhesive tape 9 has an adhesive layer 92 formed on one surface of a strip-shaped resin base material 91, and is wrapped around with the adhesive layer 92 facing inward. The adhesive tape 9 covers parts of the outer peripheral surface 21b of the first outlet portion 21, the outer peripheral surface 8b of the heat-shrinkable tube 8, and the outer peripheral surface 6a of the protective tube 6, thereby preventing the heat-shrinkable tube 8 and the protective tube 6 from shifting in the axial direction of the first outlet portion 21.

[0031] (Variation 5) 9 is a cross-sectional view showing Modification 5 in which a portion of the holding member 2 including the first lead-out portion 21 is made of an injection-molded resin member 200, and this resin member 200 is molded together with the sheath 15, the first and second insulated wires 11 and 12, and the signal cable 10 to form the holding member 2. The resin member 200 is made of a resin that is highly compatible with the holding member 2, and is formed in a tubular shape with the first and second insulated wires 11 and 12 inserted through its center.

[0032] The resin member 200 integrally comprises the large diameter portion 211, the small diameter portion 212, and the boss portion 213 of the first lead-out portion 21, and the embedded portion 201 that becomes part of the main body portion 20, and is melted with the molded resin by the heat generated when the holding member 2 is molded, thereby forming the holding member 2 as a single unit.

[0033] According to this modification 5, the same effects as those of the above embodiment can be obtained, and the structure of the mold for molding the holding member 2 can be simplified, making it possible to reduce manufacturing costs.

[0034] (Summary of embodiments and modifications) Next, the technical ideas grasped from the above-described embodiment and modified examples will be described by using the reference numerals and symbols in the embodiment and modified examples. However, the reference numerals and symbols below do not limit the components in the claims to the members and symbols specifically shown in the embodiment.

[0035] [1] A wire harness (1) comprising: a plurality of insulated electric wires (11, 12) each having a central conductor (111, 121) covered with an insulating coating (112, 122) made of insulating resin; a sheath (15) covering the plurality of insulated electric wires (11, 12) together; and a resin holding member (2) having a main body (20) holding an end of the sheath (15) together with a longitudinal portion of the plurality of insulated electric wires (11, 12), wherein the plurality of insulated electric wires (11, 12) are led out from the holding member (2), and the holding member (2) has a lead-out portion (21) for leading out the plurality of insulated electric wires (11, 12) protruding from the main body (20), and the lead-out portion (21) of the holding member (2) together with the plurality of insulated electric wires (11, 12) is covered with a shrunk heat-shrink tube (8).

[0036] [2] The wire harness (1) according to the above [1], wherein the lead-out portion (21) has a large diameter portion (211) and a small diameter portion (212) having different outer diameters, the small diameter portion (212) is provided closer to the main body portion (20) than the large diameter portion (211), and the heat-shrinkable tube (8) covers the entire large diameter portion (211) and at least a part of the small diameter portion (212).

[0037] [3] The wire harness (1) according to the above [2], wherein a circumferential groove (212b) is formed on the outer peripheral surface (212a) of the small diameter portion (212) covered by the heat shrinkable tube (8).

[0038] [4] The wire harness (1) according to the above [2], wherein the insulating coatings (112, 122) of the plurality of insulated wires (11, 12) are exposed from an outer peripheral surface (212a) of the small diameter portion (212).

[0039] [5] The wire harness (1) according to any one of [2] to [4] above, further comprising a protective tube (6) that covers the insulated electric wires (11, 12) led out from the lead-out portion (21), and the protective tube (6) is fastened to the lead-out portion (21) by a fastening member (71) at a position corresponding to the outer circumferential side of the small diameter portion (212).

[0040] [6] The wire harness (1) according to any one of [2] to [4] above, further comprising a protective tube (6) that covers the insulated electric wires (11, 12) led out from the lead-out portion (21), and an adhesive tape (9) is wound in contact with the outer peripheral surfaces (6a, 21b, 8b) of the protective tube (6), the lead-out portion (21), and the heat-shrinkable tube (8).

[0041] [7] The wire harness (1) according to any one of [1] to [6] above, wherein an adhesive (80) is interposed between the lead-out portion (21) and the plurality of insulated electric wires (11, 12) and the heat-shrinkable tube (8).

[0042] [8] The wire harness (1) according to the above item [7], wherein a space (210) for accommodating solid adhesive (800) before it is melted by heat is formed between an inner circumferential surface (21a) of the end of the lead-out portion (21) on the side where the plurality of insulated electric wires (11, 12) are led out and the plurality of insulated electric wires (11, 12).

[0043] [9] The wire harness (1) according to any one of [1] to [8] above, wherein the holding member (2) is made of a resin member (200) whose portion including the lead-out portion (21) is injection-molded, and the resin member (200) is molded together with the sheath (15) and the plurality of insulated electric wires (11, 12).

[0044]

[10] The wire harness (1) according to any one of [1] to [9] above, further comprising a signal line cable (10) having a plurality of signal lines (third and fourth insulated wires 13, 14) covered with an inner sheath (16), the signal line cable (10) together with the plurality of insulated wires (13, 14) being covered with the sheath (15), and the signal line cable (10) being led out from the sheath (15) within the holding member (2).

[0045] Although the embodiments and modifications of the present invention have been described above, the above-described embodiments and modifications do not limit the scope of the invention as claimed. It should be noted that not all of the combinations of features described in the embodiments and modifications are necessarily essential to the means for solving the problems of the invention.

[0046] The present invention can be modified as needed. For example, the third insulated wire 13 and the fourth insulated wire 14 may be signal wires for transmitting control signals for controlling an electronically controlled damper. There are also no particular limitations on the use of the wire harness. [Explanation of symbols]

[0047] 1, 1A, 1B...Wire harness 10...Signal line cable 11...First insulated wire 111, 121...Center conductor 112, 122...insulating coating 12...second insulated wire 13...Third insulated wire (signal wire) 14...Fourth insulated wire (signal wire) 15...Sheath 16...Inner sheath 2... Holding member 20... Main body 200: Resin member 21: First outlet portion 210: Space 211: Large diameter section 212...Small diameter part 212a...Outer peripheral surface 212b...Circumferential groove 21a...Inner peripheral surface 21b...Outer surface 6...Protective tube 6a...Outer circumferential surface 71...First fastening member 8...Heat shrink tubing 80,800...Hot melt adhesive 9...Adhesive tape

Claims

1. a plurality of insulated wires each having a central conductor covered with an insulating coating made of an insulating resin; a sheath that collectively covers the plurality of insulated wires; a holding member made of resin having a main body that holds the end of the sheath together with a portion of the plurality of insulated wires in the longitudinal direction, The wire harness includes the plurality of insulated wires led out from the holding member, The holding member has a lead-out portion protruding from the main body portion and leading out the plurality of insulated wires, the lead-out portion of the holding member is covered together with the plurality of insulated electric wires by a shrunk heat-shrinkable tube, the outlet portion has a large diameter portion and a small diameter portion with different outer diameters, the small diameter portion being located closer to the main body portion than the large diameter portion, The heat-shrinkable tube covers the entire large diameter portion and at least a part of the small diameter portion. Wire harness.

2. a circumferential groove is formed on the outer peripheral surface of the small diameter portion covered by the heat shrink tube; The wire harness according to claim 1 .

3. The insulating coatings of the plurality of insulated wires are exposed from the outer circumferential surface of the small diameter portion. The wire harness according to claim 1 .

4. a protective tube covering the insulated wires led out from the lead-out portion; the protective tube is fastened to the outlet portion by a fastening member at a position corresponding to the outer circumferential side of the small diameter portion; The wire harness according to any one of claims 1 to 3.

5. a protective tube covering the insulated wires led out from the lead-out portion; an adhesive tape is wound around the protective tube, the outlet portion, and the outer peripheral surfaces of the heat-shrinkable tube; The wire harness according to any one of claims 1 to 3.

6. an adhesive is interposed between the lead-out portion and the plurality of insulated electric wires and the heat-shrinkable tube; The wire harness according to any one of claims 1 to 5.

7. A plurality of insulated wires each having a central conductor covered with an insulating coating made of an insulating resin; a sheath that collectively covers the plurality of insulated wires; a holding member made of resin having a main body that holds the end of the sheath together with a portion of the plurality of insulated wires in the longitudinal direction, The wire harness includes the plurality of insulated wires led out from the holding member, The holding member has a lead-out portion protruding from the main body portion and leading out the plurality of insulated wires, the lead-out portion of the holding member is covered together with the plurality of insulated electric wires by a shrunk heat-shrinkable tube, an adhesive is interposed between the lead-out portion and the plurality of insulated electric wires and the heat-shrinkable tube; a space for accommodating solid adhesive before it is melted by heat is formed between an inner circumferential surface of an end of the lead-out portion from which the plurality of insulated electric wires are led out and the plurality of insulated electric wires; Wire harness.

8. a part of the holding member including the lead-out portion being made of an injection-molded resin member, and the resin member is molded together with the sheath and the plurality of insulated electric wires; The wire harness according to any one of claims 1 to 7.

9. a signal line cable having a plurality of signal lines covered with an inner sheath; the signal line cable is covered with the sheath together with the plurality of insulated wires, The signal line cable is led out from the sheath inside the holding member. The wire harness according to any one of claims 1 to 8.

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