Wire harnesses and waterproof connectors

Abstract

To provide a wiring harness and a waterproof connector that suppress water intrusion into a first connector (waterproof connector).SOLUTION: A wiring harness 1 is routed to a vehicle, and includes an electric wire 2, a waterproof connector 3 provided with a waterproof plug 33 connected to one end of the electric wire 2, a non-waterproof connector 4 connected to the other end of the electric wire 2, and a grommet 5 that is externally inserted onto a covering portion 23 of the electric wire 2 and closes a gap between the electric wire 2 and an electric wire insertion hole 11a provided in a partition wall 11 that separates the inside and outside of a vehicle compartment. The waterproof connector 3 includes a sealing portion 34 that covers the cut surface S1 of the covering portion 23, covers the outer surface of a core wire 22 from the cut surface S1 to the position P1 on the tip side of the electric wire 2 from the cut surface S1, and is filled between the plurality of electric wires 21 up to a position P1 on the tip side of the electric wire 2 from the cut surface S1.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a wire harness and a waterproof connector. [Background technology]

[0002] Conventionally, waterproof connectors with waterproof plugs have been generally known (see Patent Document 1). This waterproof connector has a waterproof plug fitted onto an electric wire, a terminal fitting connected to the end of the electric wire, and a housing that accommodates the terminal fitting. The waterproof plug is fitted onto the electric wire and seals the gap between the electric wire and the housing, thereby preventing water that runs down the outer surface of the electric wire from entering the housing.

[0003] In a vehicle, a wire harness may be routed from an area outside the vehicle cabin, such as the engine compartment, to the interior of the vehicle cabin. Therefore, the connectors located outside the vehicle cabin, where water is likely to splash, are often waterproof connectors, while regular connectors without waterproof plugs are often located inside the vehicle cabin, where water is less likely to splash. The interior and exterior of the vehicle cabin are separated by a panel, and the wire harness is routed from the exterior to the interior of the vehicle cabin by passing electric wires through electric wire insertion holes provided in the panel. Grommets are inserted around the electric wires to seal any gaps between the electric wires and the electric wire insertion holes. This provides an airtight seal between the interior and exterior of the vehicle cabin.

[0004] However, when the core wire of an electric cable is made up of multiple strands, gaps are formed between the strands, allowing air to flow through these gaps inside and outside the vehicle cabin. For this reason, if the vehicle cabin is flooded or an occupant spills water inside the vehicle cabin, water may seep between the strands of the electric cable routed inside the vehicle cabin. Furthermore, if the temperature outside the vehicle cabin drops suddenly and the waterproof connector becomes negative pressure, water may seep into the waterproof connector through the gaps between the strands.

[0005] Furthermore, when the core wire and terminal fittings of an electric wire are made of different metals, a technique is known in which the connection between the core wire and the terminal fittings is covered with resin to prevent water from getting on the contact points between them and thereby prevent corrosion (Patent Documents 2 to 4). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-282673 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-108798 [Patent Document 3] Japanese Patent Application Laid-Open No. 2010-108828 [Patent Document 4] Japanese Patent Application Laid-Open No. 2011-192530 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wire harness and a waterproof connector that suppresses water from entering the first connector (waterproof connector). [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the wire harness according to the present invention has the following features. A wire harness to be arranged in a vehicle, an electric wire having a core wire made of a plurality of wires and a coating portion covering the core wire; a first connector disposed outside a vehicle cabin, the first connector including: a first terminal fitting connected to one end of the electric wire; a first housing accommodating the first terminal fitting; and a waterproof plug fitted around the sheath of the electric wire to prevent a gap between the electric wire and the first housing; a second connector disposed in the vehicle interior, the second connector having a second terminal fitting connected to the other end of the electric wire and a second housing accommodating the second terminal fitting; a grommet that is inserted around the sheath of the electric wire and closes a gap between the electric wire and an electric wire insertion hole provided in a partition wall that separates the inside and outside of the vehicle compartment, The first connector further includes a sealing portion that covers the cut surface of the covering portion, covers an outer surface of the core wire from the cut surface to a position closer to one end of the electric wire than the cut surface, and fills the spaces between the plurality of wires from the cut surface to a position closer to one end of the electric wire than the cut surface. death, An inclined surface is provided on the inner surface of the waterproof plug at an end of the electric wire on one end side, the inclined surface gradually moving away from the electric wire toward the one end of the electric wire. Wire harness.

[0009] In order to achieve the above-mentioned object, the waterproof connector according to the present invention has the following features. an electric wire having a core wire made of a plurality of wires and a coating portion covering the core wire; a terminal fitting connected to an end of the electric wire; a housing that accommodates the terminal fittings; a waterproof plug that is fitted onto the covering portion and prevents a gap between the electric wire and the housing. A waterproof connector, The wire harness further includes a sealing portion that covers the cut surface of the covering portion, covers an outer surface of the core wire from the cut surface to a position closer to one end of the wire than the cut surface, and fills spaces between the plurality of wires from the cut surface to a position closer to one end of the wire than the cut surface. 、 An inclined surface is provided on the inner surface of the waterproof plug at an end of the electric wire on one end side, the inclined surface gradually moving away from the electric wire toward the one end of the electric wire. Waterproof connector. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a wire harness and a waterproof connector that prevent water from entering the first connector (waterproof connector).

[0011] The present invention has been briefly described above. The details of the present invention will become clearer by reading the following detailed description of the invention (hereinafter referred to as "embodiments") with reference to the accompanying drawings. [Brief explanation of the drawings]

[0012] [Figure 1]FIG. 1 is a schematic view showing an embodiment of a wire harness of the present invention. [Figure 2] FIG. 2 is a cross-sectional view of the waterproof connector shown in FIG. [Figure 3] FIG. 3 is a partially enlarged view of FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Figure 5] FIG. 5 is a cross-sectional view of the waterproof connector shown in FIG. 1 according to the second embodiment. [Figure 6] FIG. 6 is an enlarged view of part A in FIG. [Figure 7] FIG. 7 is a cross-sectional view of the waterproof connector shown in FIG. 1 according to the third embodiment. [Figure 8] FIG. 8 is an enlarged view of part B in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] (First embodiment) A first specific embodiment of the present invention will be described below with reference to the accompanying drawings.

[0014] Fig. 1 is a schematic diagram showing one embodiment of a wire harness of the present invention. Fig. 2 is a cross-sectional view of the waterproof connector shown in Fig. 1. Fig. 3 is a partially enlarged view of Fig. 2. Fig. 4 is a cross-sectional view taken along line AA in Fig. 3.

[0015] 1, a wire harness 1 of this embodiment is connected between an auxiliary device (not shown) arranged inside the vehicle cabin and an auxiliary device 10 arranged outside the cabin, for example, in the engine room. The cabin and the engine room are separated by a partition wall 11. The wire harness 1 is passed through an electric wire insertion hole 11a provided in this partition wall 11, and is routed from the cabin to the engine room.

[0016] As shown in FIG. 1, the wire harness 1 includes an electric wire 2, a waterproof connector 3 (first housing) connected to one end of the electric wire 2, a non-waterproof connector 4 (second housing) connected to the other end of the electric wire 2, and a grommet 5.

[0017] The electric wire 2 includes a core wire 22 made of a linear conductive wire 21 (see FIG. 4 ), and a covering 23 that insulates the core wire 22. The wire 21 contains aluminum. In other words, the electric wire 2 is an aluminum electric wire or an aluminum alloy electric wire. At each end of the electric wire 2, the covering 23 is stripped to expose a part of the core wire 22 (hereinafter, sometimes referred to as an exposed core portion 22A). In this embodiment, in the waterproof connector 3, one end side of the electric wire 2 may be referred to as the "tip side," and the other end side of the electric wire 2 may be referred to as the "base end side."

[0018] The waterproof connector 3 has a first terminal fitting 31 (terminal fitting) connected to one end of the electric wire 2, a first housing 32 (housing) that accommodates the first terminal fitting 31, a waterproof plug 33 that is inserted onto the coating portion 23 of the electric wire 2 and seals the gap between the electric wire 2 and the first housing 32, and a sealing portion 34 (see Figures 2 and 3).

[0019] The first terminal fitting 31 is formed by pressing a metal plate made of copper or a copper alloy. As shown in FIG. 1 , the first terminal fitting 31 includes a first mating connection portion 311, a first mounting portion 312, a pair of first core wire crimping pieces 313, 313, and a pair of waterproof plug crimping pieces 314, 314. The first mating connection portion 311 is connected to a mating terminal fitting 121 of the mating waterproof connector 12. In this embodiment, the first mating connection portion 311 is configured as a female type, and the male mating terminal fitting 121 is inserted and connected. A waterproof plug 123 is fitted onto the electric wire 13 connected to the mating waterproof connector 12, sealing the gap between the electric wire 13 and the mating housing 122 and preventing water from entering the mating housing 122.

[0020] The first mounting portion 312 is continuous with the base end side of the first mating connection portion 311, and one end of the electric wire 2 is mounted thereon. The first core wire crimping pieces 313, 313 stand upward from both widthwise ends of the first mounting portion 312, and crimp the exposed core portion 22A of the electric wire 2. The waterproof plug crimping pieces 314, 314 are provided closer to the base end than the first core wire crimping pieces 313, 313. The waterproof plug crimping pieces 314, 314 stand upright from both widthwise ends of the first mounting portion 312, and crimp the waterproof plug 33 that is inserted around the covering portion 23 of the electric wire 2.

[0021] 2, first placing portion 312 is provided with step portion 312A such that the portion sandwiched between first core crimping pieces 313, 313 is located higher than the portion sandwiched between waterproof plug crimping pieces 314, 314. A gap is provided between step portion 312A and exposed core portion 22A.

[0022] 1, the first housing 32 is formed with a terminal accommodating chamber 321 for inserting and accommodating the first terminal fitting 31. The terminal accommodating chamber 321 has openings 321a on the side in the insertion direction of the first terminal fitting 31 (tip end side) and 321b on the opposite side of the insertion direction (base end side), respectively, and the mating terminal fitting 121 is inserted through the opening 321a on the tip end side, and the waterproof plug 33 is press-fitted through the opening 321b on the base end side.

[0023] The first housing 32 fits into the mating housing 122 of the mating waterproof connector 12. In this embodiment, the first housing 32 is configured as a male type and is inserted into and locked into the female mating housing 122. A packing 124 is fitted onto the first housing 32, and this packing 124 seals the gap between the first housing 32 and the mating housing 122, preventing water from entering the housings 32 and 122.

[0024] The waterproof plug 33 is made of an elastic material such as rubber. The waterproof plug 33 is formed in a tubular shape that can be fitted onto the covering portion 23 of the electric wire 2, and is configured to have a plug large-diameter portion 331 having an outer diameter dimension that allows it to be press-fitted into the terminal accommodating chamber 321, and a plug small-diameter portion 332 that is crimped onto the pair of waterproof-plug crimping pieces 314, 314 of the first terminal fitting 31.

[0025] When the waterproof plug 33 is inserted onto the sheath portion 23 of the electric wire 2, the large diameter plug portion 331 is pressed into the terminal accommodating chamber 321, sealing the gap between the electric wire 2 and the terminal accommodating chamber 321 (first housing) and preventing water from seeping in toward the tip side.

[0026] Next, before describing the sealing portion 34, we will describe the non-waterproof connector 4 and the grommet 5. The non-waterproof connector 4 includes a second terminal fitting 41 connected to the other end of the electric wire 2, and a second housing 42, but does not include a waterproof plug.

[0027] The second terminal fitting 41 is made of copper or a copper alloy and includes a second mating connection portion 411, a second mounting portion 412, a pair of second core crimping portions 413, 413, and a pair of covering crimping portions 414, 414.

[0028] The second mating connection portion 411 is connected to a mating terminal fitting of a mating connector (not shown). In this embodiment, the second mating connection portion 411 is configured as a female type, and a male mating terminal fitting is inserted and connected to the second mating connection portion 411.

[0029] The second placing portion 412 is continuous with the base end side of the second mating connecting portion 411, and the other end of the electric wire 2 is placed thereon. The second core crimping portions 413, 413 stand upright from both ends in the width direction of the second placing portion 412, and crimp the exposed core portion 22A of the electric wire 2. The covering crimping portions 414, 414 are provided closer to the base end than the second core crimping portions 413, 413. The covering crimping portions 414, 414 stand upright from both ends in the width direction of the second placing portion 412, and crimp the covering portion 23 of the electric wire 2.

[0030] The second housing 42 is formed with a terminal accommodating chamber 421 for inserting and accommodating the second terminal fitting 41. The terminal accommodating chamber 421 has openings 421a and 421b on the side in the insertion direction (tip end side) of the second terminal fitting 41 and on the opposite side of the insertion direction (base end side), respectively, so that the mating terminal fitting is inserted through the opening 421a on the tip end side, and the second terminal fitting 41 is press-fitted through the opening 421b on the base end side.

[0031] The grommet 5 is made of an elastic material such as rubber. The grommet 5 is fitted onto the sheath 23 of the electric wire 2 and closes the gap between the electric wire 2 and an electric wire insertion hole 11a provided in the partition wall 11 that separates the passenger compartment from the engine compartment. This makes it possible to make the passenger compartment and the engine compartment airtight from each other. In other words, it is possible to prevent air from flowing in or out between the passenger compartment and the engine compartment.

[0032] However, as explained in the background art, when the core wire 22 of the electric wire 2 is made up of a plurality of wires 21, gaps are generated between the wires 21, and air flows between the vehicle interior and the engine compartment through the gaps.

[0033] Therefore, a sealing portion 34 is provided to close the gaps between the wires 21. In this embodiment, the sealing portion 34 is made of resin, and as shown in Figures 2 to 4, the sealing portion 34 covers the entire circumference of the cut surface S1 of the covering portion 23, covers the entire circumference of the outer surface of the core wire 22 from the cut surface S1 to a position P1 that is closer to the tip than the cut surface S1, and fills the spaces between the plurality of wires 21 from the cut surface S1 to the position P1.

[0034] The pair of first core crimping pieces 313, 313 described above are provided at positions away from the cut surface S1 of the covering portion 23 toward the tip side. Position P1 is located between the cut surface S1 and the pair of first core crimping pieces 313, 313. As a result, the core wire 22 between the cut surface S1 of the covering portion 23 and the first core crimping pieces 313, 313 is exposed upward (in the opposite direction from the first placing portion 312). Molten resin is poured from above the exposed core wire 22 and cured to form the sealing portion 34.

[0035] In this embodiment, the molten resin also permeates into the covering 23, and the sealing portion 34 also fills the gaps between the wires 21 up to position P2 on the base end side of the cut surface S1, and the gaps between the inner circumferential wall of the covering 23 and the wires 21. However, it is sufficient that the sealing portion 34 is provided at least between the cut surface S1 and position P1, and it is not necessary that the sealing portion 34 is provided between the cut surface S1 and position P2.

[0036] According to the above-described embodiment, even if the engine compartment is suddenly cooled and negative pressure is generated inside the first housing 32 of the waterproof connector 3, the sealing portion 34 can prevent water from passing through gaps in the wires 21 and entering the first housing 32. Moreover, the sealing portion 34 is provided so as to cover the cut surface S1 of the coating 23 and the outer surface of the core wire 22 from the cut surface S1 to position P1 on the tip side, and also fills the spaces between the wires 21 from the cut surface S1 to position P1 on the tip side. This makes it possible to prevent the sealing portion 34 from peeling off due to the difference in thermal expansion between the coating 23 (made of resin) and the core wire 22 (made of metal).

[0037] To explain in detail, the thermal expansion coefficient of metal is about 30 to 50 × 10 -6 , the thermal expansion coefficient of the resin is 100×1010 -6 , which is about 2 to 3 times different. For example, if sealing portion 34 is provided only within covering portion 23, sealing portion 34 is sandwiched between the inner peripheral wall of covering portion 23 and core wire 22. If sealing portion 34 is subjected to a thermal shock while sandwiched between two objects with different expansion coefficients, it will be subjected to a strong shearing force, and there is a risk that it will peel off at the interface with the metal (the outer surface of core wire 22).

[0038] However, in this embodiment, the sealing portion 34 is provided so as to cover the cut surface S1 of the covering portion 23 and the outer surface of the core wire 22 from the cut surface S1 to a position P1 on the tip side. That is, since the sealing portion 34 has a portion that is not sandwiched between the covering portion 23 and the core wire 22, it is possible to use a sealing portion 6 that has low shear strength and low toughness. In particular, if an instant adhesive that cures quickly can be used for the sealing portion 6, the waiting time until the next process can be reduced, thereby improving productivity.

[0039] (Second embodiment) Next, a second embodiment will be described. The difference between the first embodiment and the second embodiment is the configuration of the waterproof connector 3B that constitutes the wire harness 1, so the configuration of the waterproof connector 3B will be described here with reference to Figures 5 and 6. Note that Figure 5 omits the first housing 32 and the first mating connection portion 311 of the first terminal fitting 31 that constitute the waterproof connector 3B.

[0040] The waterproof connector 3B has a first terminal fitting 31 that is connected to one end of the electric wire 2, a first housing 32 that houses the first terminal fitting 31, a waterproof plug 33B that is fitted over the sheath portion 23 of the electric wire 2 and closes the gap between the electric wire 2 and the first housing 32, and a sealing portion 34B. The first terminal fitting 31 and the first housing 32 are the same as the first terminal fitting 31 and the first housing 32 of the waterproof connector 3 described in the first embodiment above, so a detailed description thereof will be omitted here.

[0041] As shown in FIG. 2, the waterproof plug 33 of the first embodiment has a tip surface that protrudes further forward than the cut surface S1 of the covering portion 23, but as shown in FIG. 6, the waterproof plug 33B of the second embodiment has an end surface S2 that is located closer to the base end than the cut surface S1 of the covering portion 23.

[0042] As in the first embodiment, the sealing portion 34B covers the entire circumference of the cut surface S1 of the covering 23, covers the entire circumference of the outer surface of the core wire 22 from the cut surface S1 to position P1, which is closer to the tip than the cut surface S1, and fills the spaces between the plurality of wires 21 from the cut surface S1 to position P1. In the second embodiment, the sealing portion 34B also covers the end surface S2 of the waterproof plug 33B, and fills the gaps between the stepped portion 312A and the exposed core portion 22A and the covering 23. The sealing portion 34B also covers the surfaces of the first core crimping pieces 313 and the surfaces of the exposed core portion 22A that protrude further toward the tip than the first core crimping pieces 313, and fills the gaps between the wires 21 that make up the exposed core portion 22A closer to the tip than position P1.

[0043] As described above, the cut surface S1 of the covering portion 23 is located closer to the tip than the end surface S2 of the waterproof plug 33B, and the sealing portion 34B is provided to cover the end surface S2 of the waterproof plug 33B. This allows the sealing portion 34B to cover not only the cut surface S1 of the covering portion 23 but also the outer surface of the covering portion 23 that protrudes beyond the waterproof plug 33B. Furthermore, a large gap G can be provided between the end of the covering portion 23 and the step portion 312A, and the sealing portion 34B can be easily filled into this gap G. This makes it difficult for the sealing portion 34B to peel off from the covering portion 23 even if thermal shrinkage occurs in the covering portion 23, further preventing water from entering the first housing 32.

[0044] According to the second embodiment described above, the sealing portion 34B is filled also between the wires 21 crimped by the first core crimping pieces 313, 313, but this is not limited to this. The sealing portion 34B covers the outer surfaces of the first core crimping pieces 313, 313 and the outer surface of the core wire 22 exposed on the distal end side of the first core crimping pieces 313, 313, but the sealing portion 34B does not have to be filled between the wires 21 crimped by the first core crimping pieces 313, 313.

[0045] (Third embodiment) Next, a third embodiment will be described. The difference between the first embodiment and the third embodiment is the configuration of the waterproof connector 3C that constitutes the wire harness 1, so the configuration of the waterproof connector 3C will be described here with reference to Figures 7 and 8. Note that Figure 7 omits the first housing 32 and the first mating connection portion 311 of the first terminal fitting 31 that constitute the waterproof connector 3B.

[0046] The waterproof connector 3C has a first terminal fitting 31 that is connected to one end of the electric wire 2, a first housing 32 that houses the first terminal fitting 31, a waterproof plug 33C that is fitted over the sheath portion 23 of the electric wire 2 and closes the gap between the electric wire 2 and the first housing 32, and a sealing portion 34C. The first terminal fitting 31 and the first housing 32 are the same as the first terminal fitting 31 and the first housing 32 of the waterproof connector 3 described in the first embodiment above, so a detailed description thereof will be omitted here.

[0047] 7 and 8, the waterproof plug 33C of the second embodiment has an inclined surface T at the tip end further distal than the waterproof plug crimping pieces 314, 314, which inclines away from the wire 2 as it approaches the tip end. In this embodiment, the inclined surface T is provided only above the waterproof plug 33C, and is not provided in the portion that faces the first mounting portion 312 in the vertical direction. As a result, when molten resin is dripped from above, it advances along the inclined surface T toward the cut surface S1 of the covering portion 23, so that the cut surface S1 can be reliably covered by the sealing portion 34C, and water intrusion into the first housing 32 can be further suppressed.

[0048] The present invention is not limited to the above-described embodiments, and can be appropriately modified, improved, etc. Furthermore, the material, shape, size, number, location, etc. of each component in the above-described embodiments are arbitrary and not limited as long as they can achieve the present invention.

[0049] Here, the features of the embodiments of the wire harness and waterproof connector according to the present invention described above will be briefly summarized and listed below in [1] to [4]. [1] A wire harness (1) to be installed in a vehicle, an electric wire (2) having a core wire (22) made of a plurality of wires (21) and a covering portion (23) covering the core wire (22); a first connector (3) disposed outside a vehicle cabin, the first connector (3) including: a first terminal fitting (31) connected to one end of the electric wire (2); a first housing (32) accommodating the first terminal fitting (31); and waterproof plugs (33, 33B, 33C) fitted onto the sheath portion (23) of the electric wire (2) to prevent a gap between the electric wire (2) and the first housing (32); a second connector (4) disposed in the vehicle interior, the second connector (4) including a second terminal fitting (41) connected to the other end of the electric wire (2) and a second housing (42) accommodating the second terminal fitting (41); a grommet (5) that is inserted onto the sheath portion (23) of the electric wire (2) and closes a gap between the electric wire (2) and an electric wire insertion hole (11a) provided in a partition wall (11) that separates the inside and outside of the vehicle compartment, The first connector (3) covers the cut surface (S1) of the covering portion (23), covers the outer surface of the core wire (22) from the cut surface (S1) to a position (P1) closer to one end of the electric wire (2) than the cut surface (S1), and further includes sealing portions (34, 34B, 34C) filled between the plurality of wires (21) from the cut surface (S1) to a position closer to one end of the electric wire (2) than the cut surface (S1). Wire harness (1).

[0050] According to the configuration [1], even if the engine compartment is suddenly cooled and negative pressure is generated in the first housing (32) of the first connector (3), the sealing portions (34, 34B, 34C) can prevent water from entering the first housing (32) through gaps in the wires (21). Furthermore, the sealing portions (34, 34B, 34C) are provided to cover the cut surface (S1) of the covering portion (23) and the outer surface of the core wires (22) from the cut surface (S1) to the position (P1) on one side of the electric wires (2), and fill the spaces between the wires (21) from the cut surface (S1) to the position (P1) on one side of the electric wires (2). This prevents the sealing portions (34, 34B, 34C) from peeling off due to the difference in thermal expansion between the covering portion (23) (made of resin) and the core wires (22) (made of metal).

[0051] [2] In the wire harness (1) described in [1], The cut surface (S1) of the covering portion (23) is provided closer to one end of the electric wire (2) than the end surface (S2) of the waterproof plug (33B), The sealing portion (34B) is provided so as to cover the end surface (S2) of the waterproof plug (33B). Wire harness (1).

[0052] According to the configuration [2] above, the cut surface (S1) of the covering portion (23) is located closer to one end of the wire (2) than the end surface (S2) of the waterproof plug (33B), and the sealing portion (34B) is arranged to cover the end surface (S2) of the waterproof plug (33B). This allows the sealing portion (34B) to cover not only the cut surface (S1) of the covering portion (23) but also the outer surface of the covering portion (23) that protrudes beyond the waterproof plug (33B). Furthermore, a large gap (G) can be provided between the end of the covering portion (23) and the first terminal fitting (31), and the sealing portion (34B) can easily fill the gap (G). This makes it difficult for the sealing portion (33B) to peel off from the covering portion (23) even if thermal shrinkage occurs in the covering portion (23), further preventing water from entering the first housing (32).

[0053] [3] In the wire harness (1) according to [1] or [2], An inclined surface (T) is provided on the inner surface of the waterproof plug (33C) at an end of one end of the electric wire (2) that is inclined away from the electric wire (2) toward the one end of the electric wire (2). Wire harness (1).

[0054] According to the configuration [3] above, the resin flows along the inclined surface (T) toward the cut surface (S1) of the covering portion (23), so that the cut surface (S1) can be reliably covered with the sealing portion (34C), and water intrusion into the first housing (32) can be further suppressed.

[0055] [4] an electric wire (2) having a core wire (22) made of a plurality of wires (21) and a covering portion (23) covering the core wire (22); a terminal fitting (31) connected to an end of the electric wire (2); a housing (32) for accommodating the terminal fittings (31); and waterproof plugs (33, 33B, 33C) fitted onto the sheath (23) to close a gap between the electric wire (2) and the housing (32). A waterproof connector (3), The cover further includes sealing portions (34, 34B, 34C) that cover the cut surface (S1) of the covering portion (23), cover the outer surface of the core wire (22) from the cut surface (S1) to a position (P1) closer to one end of the electric wire (2) than the cut surface (S1), and fill spaces between the plurality of wires (21) from the cut surface (S1) to a position closer to one end of the electric wire (2) than the cut surface (S1). Waterproof connector (3).

[0056] According to the configuration [4] above, the sealing portions (34, 34B, 34C) can prevent water from passing through gaps in the wires (21) and entering the housing (32). [Explanation of symbols]

[0057] 1 Wire harness 2 electric wire 3 Waterproof connector (first connector) 4 Non-waterproof connector (second connector) 5 Grommets 11 Partition wall 11a Electric wire insertion hole 21 Wire 22 core wire 23 Covering part 31 First terminal fitting (terminal fitting) 32 1st Housing (Housing) 33, 33B, 33C waterproof plug 34, 34B, 34C Sealing part 41 Second terminal fitting 42 Second Housing S1 cutting surface S2 end face G Gap

Claims

1. A wire harness to be arranged in a vehicle, an electric wire having a core wire made of a plurality of wires and a coating portion covering the core wire; a first connector disposed outside a vehicle cabin, the first connector including: a first terminal fitting connected to one end of the electric wire; a first housing accommodating the first terminal fitting; and a waterproof plug fitted onto the sheath of the electric wire to prevent a gap between the electric wire and the first housing; a second connector disposed in the vehicle interior, the second connector having a second terminal fitting connected to the other end of the electric wire and a second housing accommodating the second terminal fitting; a grommet that is inserted around the sheath of the electric wire and closes a gap between the electric wire and an electric wire insertion hole provided in a partition wall that separates the inside and outside of the vehicle compartment, the first connector further includes a sealing portion that covers the cut surface of the covering portion, covers an outer surface of the core wire from the cut surface to a position closer to one end of the electric wire than the cut surface, and fills spaces between the plurality of wires from the cut surface to a position closer to one end of the electric wire than the cut surface, An inclined surface is provided on the inner surface of the waterproof plug at an end of the electric wire on one end side, the inclined surface gradually moving away from the electric wire toward the one end of the electric wire. Wire harness.

2. The wire harness according to claim 1, The cut surface of the coating is provided closer to one end of the wire than the end face of the waterproof plug, The sealing portion is provided to cover the end face of the waterproof plug. Wire harness.

3. an electric wire having a core wire made of a plurality of wires and a coating portion covering the core wire; a terminal fitting connected to an end of the electric wire; a housing that accommodates the terminal fittings; a waterproof plug that is fitted onto the covering portion and prevents a gap between the electric wire and the housing. A waterproof connector, a sealing portion that covers the cut surface of the covering portion, covers an outer surface of the core wire from the cut surface to a position closer to one end of the electric wire than the cut surface, and fills spaces between the plurality of wires from the cut surface to a position closer to one end of the electric wire than the cut surface, An inclined surface is provided on the inner surface of the waterproof plug at an end of the electric wire on one end side, the inclined surface gradually moving away from the electric wire toward the one end of the electric wire. Waterproof connector.

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