JP2012142239A - Wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire harness which can reduce a cross sectional area while keeping its form.SOLUTION: The wire harness 1 comprises: a cable bundle 15 in which a plurality of cables 10 are bundled; a film 30 to cover an outer peripheral surface of the cable bundle 15; and a resin 40 which is filled between the cable bundle 15 and the film 30 while the cable bundle 15 keeps its prescribed form. Since the resin 40 is filled between the cable bundle 15 and the film 30, the wire harness 1 can keep the prescribed form, and the cross sectional area of the wire harness 1 is reduced by narrowing clearance between the film 30 and the cable bundle 15.

Description

  The present invention relates to a wire harness, and more particularly, to a wire harness that can reduce the cross-sectional area while preventing an appearance defect of a resin that maintains the shape of a cable.

  For connection between internal boards of small electronic devices typified by mobile phones, a wire harness in which a plurality of ultrafine coaxial cables are bundled may be used. Such a wire harness is routed around an electronic component disposed on the substrate, a rib of the housing, and the like and assembled to the substrate. In order to facilitate the assembly of the wire harness, the wire harness may be processed in advance so as to maintain a predetermined shape.

  Patent Document 1 listed below describes an example of such a wire harness. In this wire harness, a plurality of cables are bundled to form a cable bundle. The cable bundle has a predetermined shape and is covered with a resin formed by molding. The wire harness can maintain a predetermined shape by the resin covering the cable bundle.

JP 2006-066193 A

  However, due to further downsizing of electronic devices in recent years, the space around which the wire harness is routed is narrowed, and a wire harness having a smaller cross-sectional area is required. Therefore, in order to reduce the cross-sectional area of the wire harness described in Patent Document 1, it is only necessary to reduce the thickness of the resin formed by molding. However, when the resin is molded with a mold, if the thickness of the resin is equal to or less than a predetermined thickness, a place where the resin is not sufficiently filled may occur. Therefore, in the wire harness described in Patent Document 1, when the thickness of the resin is reduced, appearance defects may occur due to a place where the resin is not sufficiently filled, and the cross-sectional area of the wire harness may be reduced. could not.

  Then, an object of this invention is to provide the wire harness which can make a cross-sectional area small, preventing the external appearance defect of resin which maintains the shape of a cable.

  In order to solve the above-described problem, the wire harness of the present invention includes a cable bundle in which a plurality of cables are bundled, a film that covers an outer peripheral surface of the cable bundle, and the cable bundle in a predetermined shape, And a resin filled between the cable bundle and the film.

  According to such a wire harness, the wire harness can maintain a predetermined shape by the resin filled between the cable bundle and the film. And by narrowing the clearance gap between a film and a cable bundle, the thickness of resin with which it is filled can be made small and, thereby, the cross-sectional area of a wire harness can be made small. Thus, in the case where the gap between the film and the cable bundle is reduced, there may be a place where the resin is not filled as described above. However, according to the wire harness of the present invention, even when a place where the resin is not filled is generated, the film covers the place where the resin is not filled. Therefore, the appearance defect of the resin can be prevented.

  In the wire harness, the resin is preferably filled between the cable bundle and the film by insert molding.

  According to the insert molding, since the resin can be easily filled between the film and the cable bundle, the wire harness can be easily manufactured.

  Moreover, the said wire harness WHEREIN: It is preferable that the said film has a metal layer.

  According to such a wire harness, since the electromagnetic wave emitted from each cable can be blocked by the metal layer, the wire harness can be provided with noise countermeasures.

  Furthermore, in the wire harness, it is preferable that at least a part of the metal layer is exposed.

  According to such a wire harness, the potential of the metal layer can be easily dropped to the ground by connecting the grounded wiring to the exposed metal layer.

  In this case, the film may further include an insulating layer laminated with the metal layer, and the film may cover the cable bundle so that the metal layer is outside the insulating layer. good.

  Alternatively, when the film includes a metal layer in the wire harness, the film further includes an insulating layer laminated with the metal layer, and the film is configured such that the insulating layer is outside the metal layer. Furthermore, it is preferable to cover the cable bundle.

  According to such a wire harness, when the wire harness is assembled on a substrate or the like, an insulating layer is interposed between another component mounted on the substrate or the like and the metal layer of the wire harness. It is possible to prevent a short circuit between the component and the metal layer.

  Moreover, the said wire harness WHEREIN: It is preferable that the said film is provided with several opening for filling the said resin, and these opening is not located in a line along the longitudinal direction of the said cable.

  According to such a wire harness, the resin can be easily filled from a plurality of openings. Providing a plurality of openings in this way reduces the ability to block noise, but since the plurality of openings are not provided along the longitudinal direction of the cable, noise radiated from a specific cable can be kept low. .

  As described above, according to the present invention, there is provided a wire harness that can reduce the cross-sectional area while preventing the appearance failure of the resin that maintains the shape of the cable.

It is a figure which shows the wire harness which concerns on 1st Embodiment of this invention. It is a figure which shows the structure of the cross section in the II-II line | wire of FIG. It is a figure which shows the structure in a cross section perpendicular | vertical to the longitudinal direction of the cable of FIG. It is a figure which shows the state which has arrange | positioned the film and the cable bundle to a lower side metal mold | die. It is a figure which shows a mode that the cable bundle was covered with the film. It is a figure which shows a mode that the lower mold and the upper mold were put together. It is a figure which shows the structure in a cross section perpendicular | vertical to the longitudinal direction of the wire harness which concerns on 2nd Embodiment of this invention.

  Hereinafter, a preferred embodiment of a wire harness according to the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a view showing a wire harness according to a first embodiment of the present invention, and FIG. 2 is a view showing a cross-sectional structure taken along line II-II in FIG. That is, FIG. 2 is a view showing a structure in a cross section perpendicular to the longitudinal direction of the wire harness 1.

  As shown in FIGS. 1 and 2, the wire harness of the present embodiment includes a plurality of cables 10, a pair of connectors 20 connected to both ends of each cable 10, and a film 30 that covers the plurality of cables 10, A resin 40 filled between the cable 10 and the film 30 is provided as a main configuration.

  FIG. 3 is a view showing a structure in a cross section perpendicular to the longitudinal direction of the cable 10 of FIG. As shown in FIG. 3, the cable 10 in the present embodiment is a coaxial cable, and includes a central conductor 11, an insulating layer 12 that covers the outer peripheral surface of the central conductor 11, and an outer conductor that covers the outer peripheral surface of the insulating layer 12. 13 and a jacket 14 made of an insulating layer covering the outer conductor 13.

  The center conductor 11 is composed of a plurality of conductive wire strands. The material of the center conductor 11 is not particularly limited as long as it is a conductor, and examples thereof include copper and nickel.

  The insulating layer 12 covering the outer peripheral surface of the center conductor 11 is made of an insulating resin having a predetermined thickness, and such a resin is not particularly limited. For example, polyester resin, polyolefin resin, nylon , Fluororesins, and polyester resins include polyethylene terephthalate. Polyolefin resins include ethylene-propylene copolymer resins, polypropylene, polyethylene, or mixtures thereof. Include nylon 66 and nylon 6, and examples of the fluorine-based resin include polytetrafluoroethylene, a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, and a tetrafluoroethylene-ethylene copolymer. In addition, in polyester-type resin, polyolefin-type resin, and nylon, it is preferable from a viewpoint of improving a flame retardance that metal hydroxide particles, such as magnesium hydroxide, and a phosphorus flame retardant are mixed.

  The outer conductor 13 covering the outer peripheral surface of the insulating layer 12 is composed of a metal braid or the like. The metal braid is made of, for example, a large number of conductive wires having a diameter of 0.1 mm or less. Examples of such a metal braid material include copper and nickel.

  The jacket 14 is formed by extruding a thermoplastic resin. Examples of such a thermoplastic resin include fluorine resins such as polytetrafluoroethylene, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, and tetrafluoroethylene-ethylene copolymer.

  Although not particularly shown, since the cable 10 is connected to the connector 20, both ends are opened. That is, at both ends of the cable 10, the outer conductor 13 is exposed from the jacket 14, the insulating layer 12 is exposed from the outer conductor 13, and the central conductor 11 is exposed from the insulating layer 12.

  Each connector 20 includes a plurality of signal terminals (not shown) and a ground terminal (not shown). And the center conductor 11 of each cable 10 is connected to each signal terminal of the connector 20, and the external conductor 13 of each cable 10 is connected in common to the ground terminal.

  As shown in FIGS. 1 and 2, each cable 10 is bundled into a cable bundle 15 in a section that is separated from each connector 20 by a predetermined distance. The outer peripheral surface of the cable bundle 15 is covered with the film 30, and the resin 40 is filled between the film 30 and the cable bundle 15. And the shape of the cross section perpendicular | vertical to the longitudinal direction of the wire harness 1 in the part where the cable bundle 15 was covered with the film 30 is made into the substantially square shape.

  The film 30 includes an insulating layer 31 and a metal layer 32 laminated on the insulating layer 31. The insulating layer 31 is made of a resin molded into a film shape. Such a resin is not particularly limited as long as it is an insulating resin, and examples thereof include polyethylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, and polyimide. Among these, polyethylene terephthalate is preferable because it is easily combined with a metal material and is inexpensive. In addition, the thickness of the insulating layer 31 is not particularly limited, but is, for example, 9 μm to 100 μm.

  The metal layer 32 is provided on the insulating layer 31 by vapor deposition or pasting. The thickness of the metal layer 32 is not particularly limited, but is, for example, 0.1 μm to 20 μm. Examples of the metal constituting the metal layer 32 include aluminum, copper, and stainless steel (SUS).

  The film 30 covers the cable bundle 15 such that the metal layer 32 faces the cable 10 and the insulating layer 31 is outside the metal layer 32. As shown in FIGS. 1 and 2, a plurality of openings 35 for filling the resin 40 are formed in the film 30, and the openings 35 are not arranged along the longitudinal direction of the cable 10.

  In the state where the film 30 covers the cable bundle 15 as described above, the resin 40 is filled and solidified from the opening 35 between the cable bundle 15 and the film 30 by molding. The resin 40 is also filled in the opening 35 formed in the film 30 and fills the opening 35. Such a resin 40 is a thermoplastic resin that can be filled by molding, and is not particularly limited as long as it is a thermoplastic resin. For example, polyamide, polypropylene, polyethylene, ABS resin, polybutylene terephthalate, polychlorinated Vinyl and the like can be mentioned. Among them, polyamide is preferable because it can be molded at a relatively low temperature and low pressure.

  As shown in FIG. 1, since the resin 40 is solidified in a predetermined shape, the wire harness 1 maintains the predetermined shape.

  As described above, according to the wire harness 1 of the present embodiment, the wire harness 1 can maintain a predetermined shape by the resin 40 filled between the cable bundle 15 and the film. And by narrowing the clearance gap between the film 30 and the cable bundle 15, the thickness of the resin 40 with which it fills can be made small, and, thereby, the cross-sectional area of the wire harness 1 can be made small. Thus, in the case where the gap between the film 30 and the cable bundle 15 is reduced, there may be a place where the resin 40 is not filled. However, according to the wire harness 1 of the present embodiment, even when a place where the resin 40 is not filled occurs, the film 30 covers this place, so that appearance defects of the resin 40 can be prevented.

  Moreover, according to the wire harness 1 of this embodiment, since the electromagnetic wave emitted from each cable 10 is interrupted | blocked by the metal layer 32, it can be set as the wire harness 1 with which the noise countermeasure was taken.

  Further, according to the wire harness 1 of the present embodiment, when the wire harness 1 is assembled to a substrate or the like, an insulating layer is provided between the other component mounted on the substrate or the like and the metal layer 32 of the wire harness 1. Since 31 is interposed, it is possible to prevent other components and the metal layer 32 from being short-circuited.

  Moreover, according to the wire harness 1 of this embodiment, the resin 40 can be easily filled from the plurality of openings 35. Providing a plurality of openings 35 in this manner reduces the ability to block noise. However, since the plurality of openings 35 are not provided along the longitudinal direction of the cable 10, strong noise is radiated from one cable 10. Therefore, radiation noise can be kept low.

  Next, the manufacturing method of the wire harness 1 is demonstrated.

  First, a pair of connectors 20 and a plurality of cables 10 are prepared, and both ends of each cable 10 are extracted. Then, the center conductor 11 of each cable is connected to each signal terminal of each connector 20, and the outer conductor 13 of each cable 10 is connected to the ground terminal of each connector 20. The connection between the center conductor 11 and the signal terminal and the connection between the external conductor 13 and the ground terminal are performed by soldering.

  Next, the lower mold 51 is prepared. In the lower mold 51, the wire harness 1 is formed with a mold having a predetermined shape as shown in FIG. Next, as shown in FIG. 4, the film 30 is pushed into the mold of the lower mold 51 so that the film 30 is along the inner wall surface of the lower mold 51 and the upper part of the mold is released. To. At this time, using a jig (not shown) so that the film 30 is pushed into the mold at a predetermined position, the insulating layer 31 of the film 30 is in contact with the lower mold 51 and the metal layer 32 faces inward. To. Next, the cables 10 having both ends connected to each connector 20 are bundled to form a cable bundle 15, and the cable bundle 15 is inserted into a mold of the lower mold 51 whose inner wall surface is covered with the film 30. In this way, as shown in FIG. 4, the film 30 and the cable bundle 15 are arranged in the lower mold 51.

  Next, the film 30 is folded so as to cover the mold, and the outer peripheral surface of the cable bundle 15 is covered with the film 30. Thus, the cable bundle 15 is covered with the film 30 as shown in FIG.

  Next, the upper mold is aligned with the lower mold 51. The upper mold 52 has a nested shape with the lower mold 51 and is formed so as to be aligned with the lower mold 51 without any positional deviation. The upper mold 52 is formed with a gate 53 for introducing the resin 40 into the mold so that the position of the gate 53 coincides with the position of the opening 35 formed in the film 30. . In other words, as shown in FIG. 6, when the upper mold 52 is put together, the film 30 is placed at a predetermined position so that the opening 35 and the gate 53 are aligned. It is pushed into the mold.

  Next, the resin 40 is filled from the gate 53. At this time, the resin 40 is mainly filled between the cable bundle 15 and the film 30, and a part of the resin is filled in the gaps between the cables 10. Thus, the resin 40 is molded so that the cable bundle 15 is covered with the resin 40. That is, insert molding in which the cable bundle 15 is inserted is performed. In addition, since a relatively wide space between the cable bundle 15 and the film 30 and in the gap between the cables 10 extends mainly along the longitudinal direction of the cable 10, the resin 40 has a longitudinal length of the cable 10. Easy to penetrate along the direction. Therefore, in the present embodiment, since the plurality of openings 35 formed in the film 30 are not formed along the longitudinal direction of the cable 10, the resin 40 filled from each opening 35 is formed of the cable bundle 15 and the film. 30 and the gaps between the cables 10 are filled in different relatively wide spaces, and the resin 40 mainly invades along different relatively wide spaces. Therefore, the resin 40 filled from each opening 35 is easily filled uniformly in the film 30.

  According to the manufacturing method of the wire harness of this embodiment, since the resin 40 is filled between the film 30 and the cable bundle 15 by insert molding, it can be easily molded.

  Moreover, since the opening 35 provided in the film 30 is not formed along the longitudinal direction of the cable 10, the resin 40 can be uniformly filled.

  In this way, the wire harness 1 shown in FIGS. 1 and 2 is obtained.

(Second Embodiment)
Next, a second embodiment of the present invention will be described in detail with reference to FIG. In addition, about the component which is the same as that of 1st Embodiment, or equivalent, except the case where it demonstrates especially, the same referential mark is attached | subjected and the overlapping description is abbreviate | omitted. FIG. 7 is a view showing the structure of the cross section of the wire harness according to the second embodiment of the present invention from the same viewpoint as FIG.

  As shown in FIG. 7, the wire harness of the present embodiment is the wire harness of the first embodiment in that the insulating layer 31 of the film 30 faces the cable 10 side and the metal layer 32 is exposed to the outside. Different from harness 1. In manufacturing such a wire harness, when the film 30 is pushed into the lower mold 51, the front and back of the film 30 may be reversed.

  According to the wire harness of this embodiment, by connecting the grounded wiring to the exposed metal layer 32, the potential of the metal layer 32 can be easily dropped to the ground and can easily function as a shield. .

  The present invention has been described above by taking the first and second embodiments as examples, but the present invention is not limited to these.

  For example, in the above embodiment, the coaxial cable is described as an example of the cable 10, but the present invention is not limited to this, and the cable 10 does not include the outer conductor 13 and the jacket 14, and the central conductor 11 and the insulating layer 12. It may be an insulated cable consisting of

  Moreover, in the said embodiment, as shown to FIG. 2, FIG. 7, although the shape of the cross section perpendicular | vertical to the longitudinal direction of a wire harness in the part where the cable bundle 15 was covered with the film 30 is made into the substantially square shape. The cross-sectional shape may be, for example, a circle or a triangle.

  Moreover, in the said embodiment, the film 30 may be comprised only from the insulating layer 31, or may be comprised only from the metal layer 32. FIG.

  In the first embodiment, a part of the metal layer 32 may not be covered with the insulating layer 31 and the metal layer 32 may be exposed from the outside of the wire harness 1. In the second embodiment, a part of the metal layer 32 may be covered with another insulating layer.

  As described above, according to the present invention, there is provided a wire harness that can be reduced in cross-sectional area while preventing the appearance defect of the resin that maintains the shape of the cable.

DESCRIPTION OF SYMBOLS 1 ... Wire harness 10 ... Cable 11 ... Center conductor 12 ... Insulating layer 13 ... Outer conductor 14 ... Jacket 15 ... Cable bundle 20 ... Connector 30 ... Film 31 ... Insulating layer 32 ... Metal layer 35 ... Opening 40 ... Resin 51 ... Lower mold 52 ... Upper mold 53 ... Gate

Claims (7)

A cable bundle in which a plurality of cables are bundled;
A film covering the outer peripheral surface of the cable bundle;
In a state where the cable bundle is in a predetermined shape, a resin filled between the cable bundle and the film;
A wire harness comprising:   The wire harness according to claim 1, wherein the resin is filled between the cable bundle and the film by insert molding.   The wire harness according to claim 1, wherein the film has a metal layer.   The wire harness according to claim 3, wherein at least a part of the metal layer is exposed. The film further includes an insulating layer laminated with the metal layer,
The wire harness according to claim 4, wherein the film covers the cable bundle such that the metal layer is outside the insulating layer. The film further includes an insulating layer laminated with the metal layer,
The wire harness according to claim 3, wherein the film covers the cable bundle such that the insulating layer is outside the metal layer.   7. The film according to claim 3, wherein the film is provided with a plurality of openings for filling the resin, and the plurality of openings are not arranged along a longitudinal direction of the cable. Item 1. A wire harness according to item 1.

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