JP2012039777A - Wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify work installing parts for realizing protection of an electromagnetic shield and a cable in a wire harness connected to an electrical apparatus.SOLUTION: In a cable protector 30 of a wire harness 1, cylindrical shield members 60 covering a periphery of a cable 10 are integrally held with cylindrical outer skin parts 40 and its inside inner skin parts 50 composed of insulation having flexibility, by being sandwiched between the both skin parts. At ends of the outer skin parts 40, connection parts 42, which covers cylindrical parts 71 formed at marginal parts of a cable installation port in a case 70 of an electrical apparatus, are formed.

Description

  The present invention relates to a wire harness including a cable and a cylindrical cable protector that covers the periphery of the cable.

  A wire harness mounted on a vehicle such as an automobile often includes a cable, a shield member that covers the periphery of the cable, and a terminal provided at the end of the cable. A general shield member is a braided wire. Such a wire harness has its end inserted into the housing of the electrical equipment through the opening, and the terminal at the end is connected to a terminal block housed in the housing of the electrical equipment. In addition, at the end of the cable, the shield member is electrically connected to a conductive casing in the electrical equipment.

  Moreover, a wire harness may be equipped with the cable protector for protecting a cable and a shield member over the area | region including a connection part with the housing | casing of an electrical equipment. Patent Document 1 discloses a rubber boot that is a typical example of such a cable protector. The rubber boot shown in Patent Document 1 is made of rubber formed in a cylindrical shape that covers the periphery of a cable, and a connection portion (fitting portion) that covers an edge portion of a cable introduction port in a casing of an electrical equipment is at an end portion. It is a formed member.

JP 2006-313698 A

  However, the conventional wire harness has a problem that the shield member and the rubber boot need to be sequentially arranged with respect to the cable in order to realize the electromagnetic shield and the cable protection, and the mounting work is troublesome. Yes.

  An object of the present invention is to simplify the work of mounting a member for realizing protection of an electromagnetic shield and a cable in a wire harness connected to an electrical equipment.

The wire harness according to the present invention includes a cable and a cylindrical cable protector that covers the periphery of the cable, and the cable protector includes the following components.
(1) The first component is made of a flexible insulator formed in a cylindrical shape, and a connection portion that covers the edge of the cable introduction port in the housing of the electrical equipment is formed at the end. The outer skin.
(2) The second component is a shield member made of a flexible conductor formed in a cylindrical shape along the inner surface of the outer skin portion.
(3) The third component is made of a flexible insulator formed in a cylindrical shape along the inner side surface of the shield member, and the shield member is sandwiched between the outer skin portion and the shield member. It is an inner skin part that holds the shield member together with the outer skin part.

  Further, it is conceivable that the outer skin part and the inner skin part are each made of rubber.

  In the wire harness according to the present invention, the shield member for electromagnetic shielding is integrally held by the outer skin portion and the inner skin portion that protect the cable. Therefore, the cable is passed through the inner part of the inner surface of the cylindrical wire protector, and the connection part of the outer skin part is put on the edge of the cable introduction port in the housing of the electric equipment. It is protected over an area including a connection portion with the casing. Therefore, according to this invention, the operation | work which mounts | wears with the member for implement | achieving protection of an electromagnetic shield and a cable can be simplified in the wire harness connected to an electrical equipment.

  In addition, if the outer skin portion and the inner skin portion including the connection portion are made of rubber, the connection portion tightens the edge of the cable introduction port (a part of the housing) by its elasticity, so that the connection portion becomes the edge of the cable introduction port. This is preferable because it is held more securely with respect to the portion.

1 is a perspective view of a wire harness 1 according to an embodiment of the present invention. 1 is a longitudinal sectional view of a wire harness 1. FIG. It is a longitudinal cross-sectional view of the wire harness 1 to which the caulking ring was attached. It is a perspective view of a caulking ring. It is a side view of a caulking ring.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The following embodiment is an example embodying the present invention, and is not an example of limiting the technical scope of the present invention.

  First, the wire harness 1 which concerns on embodiment of this invention is demonstrated, referring FIG.1 and FIG.2. As shown in FIG. 1, the wire harness 1 includes a plurality of cables 10 in which an insulation coating is formed around a core wire and terminals 20 are provided at the ends, and a cylindrical cable protection covering the periphery of the cables 10. The tool 30 is provided.

  The terminal 20 at the end of the cable 10 in the wire harness 1 is inserted from a cable introduction port formed in the conductive casing 70 in the electrical equipment, and is connected to a terminal block 80 disposed in the casing 70. The housing 70 is made of, for example, a metal (conductor) such as aluminum, stainless steel, or copper, and the terminal block 80 relays electrical connection between the cable 10 and an electronic component (not shown). In FIG. 2, the housing 70 of the electrical equipment and the terminal block 80 arranged in the housing 70 are indicated by virtual lines (two-dot chain lines). Further, in FIG. 2, a screw for fixing the terminal 20 of the cable 10 to the terminal block 80 is omitted.

  The cable protector 30 includes an outer skin portion 40 that forms an outer surface, an inner skin portion 50 that forms an inner surface, and a shield member 60 that is sandwiched between the outer skin portion 40 and the inner skin portion 50. Yes. The outer skin portion 40 and the inner skin portion 50 are each formed in a cylindrical shape and are made of a flexible insulator. The outer skin portion 40 and the inner skin portion 50 are preferably insulating members that can be elastically deformed, for example, members made of rubber such as fluorine rubber, silicone rubber, or acrylic rubber.

  As shown in FIG. 2, the outer skin portion 40 includes a bellows portion 41 having a relatively small outer diameter and a connection portion 42 having a relatively large outer diameter. The bellows portion 41 has a structure in which the surface is formed in a wave shape in which mountain-shaped portions and valley-shaped portions are alternately continued in the longitudinal direction. As described above, the bellows portion 41 has a structure that can be easily bent along a curved wiring path. Moreover, the connection part 42 is a part which covers the cylindrical part 71 formed in the edge part of the cable introduction port 74 in the housing | casing 70 of an electrical equipment.

  Although not shown in FIG. 2, a ring-shaped caulking metal fitting is attached in a state in which the connection portion 42 covered on the tubular portion 71 of the housing 70 is tightened from the outside. Thereby, the connection state of the connection part 42 of the cable protector 30 and the cylindrical part 71 of the housing | casing 70 is hold | maintained firmly. Although not shown in FIG. 2, the connection portions 42 and 52 of the outer skin portion 40 and the inner skin portion 50 are formed at one of both ends of the outer skin portion 40 and the inner skin portion 50, respectively. Sometimes formed.

  The shield member 60 is a member made of a flexible conductor formed in a cylindrical shape along the inner surface of the outer skin portion 40. A typical example of the shield member 60 is a braided wire in which strands such as copper wires are knitted into a cylindrical shape. It is also conceivable that the shield member 60 is a conductor film such as copper or aluminum formed in a cylindrical shape.

  Further, the inner skin portion 50 is formed in a cylindrical shape along the remaining portion of the inner side surface of the shield member 60 excluding a part on the terminal side located inside the connection portion 42 of the outer skin portion 40. Similar to the outer skin portion 40, the inner skin portion 50 includes a bellows portion 51 having a relatively small outer diameter and a connection portion 52 having a relatively large outer diameter. The bellows portion 51 of the inner skin portion 50 is formed inside the bellows portion 41 of the outer skin portion 40, and the connection portion 52 of the inner skin portion 50 is formed inside the connection portion 42 of the outer skin portion 40. The connecting portion 52 of the inner skin portion 50 is also a portion that covers the cylindrical portion 71 (the edge portion of the cable introduction port 74) in the casing 70 of the electrical equipment together with the connecting portion 52 of the outer skin portion 40.

  The inner skin portion 50 holds the shield member 60 together with the outer skin portion 40 by sandwiching the shield member 60 between the inner skin portion 40 and the outer skin portion 40. That is, the cylindrical shield member 60 is embedded between the cylindrical outer skin portion 40 and the inner skin portion 50.

  As shown in FIG. 2, the connecting portion 42 of the outer skin portion 40 is formed from the outer surface to the inner surface at the end of the shield member 60. That is, the end portion of the shield member 60 is covered with the outer skin portion 40 in a range from the outer surface to the inner surface. Further, the inner side surface of the shield member 60 is exposed between the tip inner side portion 42 </ b> A that is a portion formed on the inner side surface of the shield member 60 in the connection portion 42 of the outer skin portion 40 and the end portion 52 </ b> A of the inner skin portion 50. A window 43 is formed. Hereinafter, the portion exposed from the window 43 on the inner surface of the shield member 60 is referred to as a shield exposed portion 60A.

  In the wire harness 1, a shield member 60 for electromagnetic shielding is integrally held by an outer skin portion 40 that protects the cable 10. Furthermore, the shield exposed portion 60 </ b> A is exposed through the window 43 toward the inside of the connection portion 42 at the end portion of the outer skin portion 40. And the protrusion part 72 which fits into the window 43 of the wire harness 1 and contacts shield exposed part 60A is formed in the outer peripheral surface of the cylindrical part 71 in the housing | casing 70 of an electrical equipment.

  When the wire harness 1 is connected to the electrical equipment, the cable 10 is passed inside the cylindrical outer skin portion 40 and the inner skin portion 50, and the connection portions 42 and 52 of the outer skin portion 40 and the inner skin portion 50 are connected to the housing 70 of the electrical equipment. The work which covers the cylindrical part 71 (edge part of the cable introduction port 74) is performed. Then, only by performing the work, the cable 10 is protected over an area including a portion where the casing 70 and the outer skin portion 40 are connected, and the shield exposed portion 60A inside the connection portion 42 is The shield member 60 and the housing 70 are in an electrically connected state by contacting the protruding portion 72 of the housing 70. Therefore, if the wire harness 1 is employed, it is possible to simplify the work of mounting a member for realizing protection of the electromagnetic shield and the cable 10.

  Further, the fitting mechanism between the protruding portion 72 of the housing 70 and the window 43 of the wire harness 1 also functions as a mechanism for preventing the connecting portions 42 and 52 of the wire harness 1 from being detached from the housing 70. Further, as shown in FIG. 2, the tip inner side portion 42 </ b> A of the connecting portion 42 of the outer skin portion 40 is fitted to the side of the protruding portion 72 in the cylindrical portion 71 (the edge portion of the cable introduction port 74) of the housing 70. It is preferable if the groove 73 is formed. Accordingly, the fitting mechanism between the tip inner side portion 42A of the outer skin portion 40 and the groove 73 functions as a dustproof and waterproof mechanism that prevents the dust and liquid from entering the cable protector 30.

  Moreover, since the wire harness 1 includes the outer skin portion 40 and the inner skin portion 50 that sandwich the shield member 60 therebetween, the shield member 60 such as a braided wire can be prevented from being caught by the terminal 20 of the cable 10 or the like. Therefore, the operation of passing the cable 10 through the cylindrical outer skin portion 40 and the inner skin portion 50 is further facilitated, and the inner surface of the shield member 60 is also protected.

  In addition, a connection portion 42 of the outer skin portion 40 is formed from the outer surface to the inner surface of the end portion of the shield member 60, and the window 43 that exposes the shield exposed portion 60 </ b> A between the connection portion 42 and the inner skin portion 50. With the structure formed, the end of the shield member 60 is prevented from being caught by the housing 70 of the electrical equipment, and the shield member 60 is more reliably protected.

  By the way, when the shield member 60 is sandwiched between the outer skin portion 40 and the inner skin portion 50, the drain wire connected to the shield member 60 is a structure for connecting the shield member 60 to the housing 70 of the electrical equipment. However, a structure drawn from between the outer skin portion 40 and the inner skin portion 50 is conceivable. In this case, the drain wire is fixed to a part of the housing 70 by screwing or connector connection.

  However, in the wire harness 1, a part of the shield member 60 (shield exposed portion 60 </ b> A) is exposed inward through the window 43 at a position inside the connecting portion 42 of the outer skin portion 40. Therefore, in the wire harness 1, the casing grounding of the shield part 60 is realized only by covering the connection parts 42 and 52 of the cable protector 30 on the cylindrical part 71 of the casing 70. That is, in the wire harness 1, the operation for connecting the drain wire or the like to the housing 70 is not required, and the operation for grounding the housing of the shield 60 is easy.

  Further, since the outer skin portion 40 is an elastically deformable rubber member, the connection portion 42 of the outer skin portion 40 has an effect of tightening the cylindrical portion 71 of the housing 70 by its elasticity. As a result, the connecting portion 42 of the outer skin portion 40 is more reliably held with respect to the cylindrical portion 71 (the edge portion of the cable introduction port 74) of the housing 70, and the shield exposed portion 60A and the protrusion of the housing 70 are further secured. The part 72 contacts more reliably.

  In the embodiment described above, an example in which the outer skin portion 40 and the inner skin portion 50 are members made of rubber is shown. However, the outer skin portion 40 and the inner skin portion 50 are made of, for example, polypropylene (PP) or polyethylene terephthalate (PET). It is also conceivable that it is a synthetic resin member having other flexibility.

  Further, in the outer skin portion 40 and the inner skin portion 50, the surface of the portion having a relatively small outer diameter with respect to the connection portions 42 and 52 is not necessarily required to have a corrugated surface.

  FIG. 3 is a longitudinal sectional view of the wire harness 1 to which the caulking ring 90 is attached. 4 and 5 are a perspective view and a side view of the caulking ring 90, respectively. The perspective view shown in FIG. 4 shows the initial state of the caulking ring 90 before being attached, and the side view shown in FIG. 5 shows the caulking ring 90 when attached.

  As shown in FIG. 4, the caulking ring 90 is a flexible band-shaped member such as a metal or a resin formed in a substantially annular shape, and connecting mechanisms 91 and 92 are provided at both ends thereof. 4 includes a receiving portion 92 that is provided at one end portion of the caulking ring 90 to form a through hole, and the other end portion of the caulking ring 90 is a through hole of the receiving portion 92. A claw portion 91 that is hooked on the receiving portion 92 when inserted is provided. As shown in FIG. 5, when the claw portion 91 is hooked on the receiving portion 92, the caulking ring 90 is held in an annular shape.

  As shown in FIG. 3, in the wire harness 1, it is conceivable that the outer peripheral portion of the connection portion 42 of the outer skin portion 40 that covers the cylindrical portion 71 of the housing 70 is tightened by the caulking ring 90. As a result, the shield exposed portion 60 </ b> A reliably contacts the cylindrical portion 71 of the housing 70, and the shielding property is reliably ensured.

  It is also conceivable that the connecting portion 42 of the outer skin portion 40 includes a protruding portion 42B that forms a groove into which the caulking ring 90 fits in the outer peripheral portion thereof. Accordingly, the caulking ring 90 is less likely to be detached from the connection portion 42 of the outer skin portion 40, and the protrusion 42 </ b> B is suitable as a mark for the mounting position of the caulking ring 90.

DESCRIPTION OF SYMBOLS 1 Wire harness 10 Cable 20 Terminal 30 Cable protector 40 Outer skin part 41 Bellows part 42 Outer skin part connection part 42A Front end inner part 43 Window 50 Endothelial part 51 Endothelium part bellows part 52 Endothelial part connection part 52A End part of inner skin part 60 Shield Member 60A Shield Exposed Portion 70 Electrical Equipment Case 71 Case Case Cylindrical Case 72 Case Protrusion 73 Case Groove 74 Cable Inlet 80 Terminal Block 90 Caulking Ring

Claims (2)

A wire harness comprising a cable and a cylindrical cable protector covering the periphery of the cable,
The cable protector is
An outer skin part made of a flexible insulator formed in a cylindrical shape, with a connection part covering the edge of the cable inlet in the housing of the electrical equipment formed at the end part,
A shield member made of a flexible conductor formed in a cylindrical shape along the inner surface of the outer skin part;
The shield member is made of a flexible insulator formed in a cylindrical shape along the inner surface of the shield member, and the shield member is held together with the outer skin portion by sandwiching the shield member between the outer skin portion and the outer skin portion. A wire harness comprising: an inner skin portion.   The wire harness according to claim 1, wherein the outer skin portion and the inner skin portion are made of rubber.

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