Wire harness assembly

Abstract

To provide a wire harness assembly which can improve acoustic insulation.SOLUTION: In a wire harness assembly 1 comprising: a wire harness 3 comprising electric wire 7, and a connector 9 electrically connected with a terminal part of the electric wire 7; and an acoustic insulation member 5 comprising a base material 11, and a cover material 13 integrally provided on one surface side of the base material 11 and the wire harness 3 is arranged between the base material 11 and the cover material 13, a plurality of through holes 15 are provided in at least either of the base material 11 or the cover material 13, and the plurality of through holes 15 comprise a plurality of opening areas 17 with different opening ratio per unit area.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a wire harness assembly.

Background Art

[0002] Conventionally, as a wire harness assembly, a wire harness having an electric wire and a connector electrically connected to a terminal portion of the electric wire has been provided. Further, there is known a soundproof member having a porous body as a base material and a sheet-like body as a cover material integrally provided on one surface side of the porous body, with the wire harness disposed between the porous body and the sheet-like body (see Patent Document 1). In this wire harness assembly, a plurality of through holes are provided in the sheet-like body. By providing a plurality of through holes in the sheet-like body, it is possible to absorb sound in a wider frequency range and improve soundproof performance as compared with a sheet-like body not provided with through holes.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the wire harness assembly as in Patent Document 1 above, a plurality of through holes are provided uniformly over the entire surface of the soundproof member. When the plurality of through holes are uniform, the frequency range in which sound can be absorbed is the same at any position of the soundproof member. For this reason, in the conventional soundproof member, there is a limit to the frequency range in which sound can be absorbed, and further improvement in soundproof performance has been desired.

[0005] The present invention has been made in view of such problems of the prior art. And an object of the present invention is to provide a wire harness assembly capable of improving soundproof performance.

Means for Solving the Problems

[0006] The wire harness assembly according to this embodiment includes a wire harness having an electric wire and a connector electrically connected to a terminal portion of the electric wire, a base material, and a cover material integrally provided on one surface side of the base material. The wire harness is disposed between the base material and the cover material, and a soundproof member is provided. At least one of the base material and the cover material is provided with a plurality of through holes, and the plurality of through holes have a plurality of opening regions with different opening ratios per unit area.

Effect of the Invention

[0007] According to the present invention, it is possible to provide a wire harness assembly capable of improving soundproof performance.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Mode for Carrying Out the Invention

[0009] Hereinafter, the wire harness assembly according to this embodiment will be described in detail with reference to the drawings. Note that the dimensional ratios in the drawings are exaggerated for convenience of explanation and may be different from the actual ratios.

[0010] As shown in FIG. 1, the wire harness assembly 1 according to the present embodiment is applied to a wire harness 3 that electrically connects electrical components (not shown) such as between a power source and a device mounted on a vehicle or between devices. The wire harness 3 is arranged in a predetermined shape inside a sound insulation member 5 that is integrally assembled. The wire harness assembly 1 is assembled to a target member (not shown) such as a door trim of a vehicle. The sound insulation member 5 assembled to the target member absorbs, for example, sound propagated from the outside into the vehicle interior and maintains the quietness of the vehicle interior.

[0011] As shown in FIGS. 1 to 3, the wire harness assembly 1 includes a wire harness 3 and a sound insulation member 5.

[0012] As shown in FIGS. 1 to 3, the wire harness 3 includes electric wires 7 and connectors 9.

[0013] The electric wires 7 are, for example, covered electric wires in which the outer periphery of a core wire made of a conductive material is covered with an insulating coating, and a plurality (here, four) are used. Note that the electric wires 7 may be flat cables in which a plurality of core wires are arranged in parallel and the outer periphery is covered with an insulating coating. The terminal portions on both sides of the plurality of electric wires 7 are respectively exposed from the sound insulation member 5. The terminal portions on one end side of the plurality of electric wires 7 are gathered and arranged at one location, and the terminal portions on the other end side are arranged so as to branch respectively.

[0014] The connector 9 includes, for example, a housing (not shown) made of an insulating material such as synthetic resin and terminals (not shown) made of a conductive material. The housing is, for example, capable of fitting with a mating housing (not shown) of a mating connector (not shown) electrically connected to an electrical component mounted on a vehicle. The terminals are electrically connected to the terminal portions of the electric wires 7 and are housed in the housing. The terminals are electrically connected to mating terminals (not shown) housed in the mating housing when the housing and the mating housing are fitted together. A plurality (here, five) of connectors 9 are used corresponding to the terminal portions of the plurality of electric wires 7 exposed from the sound insulation member 5.

[0015] As shown in FIGS. 1 to 3, the sound insulation member 5 includes a base material 11 and a cover material 13.

[0016] The base material 11 is made of, for example, a foam such as urethane, a non-woven fabric such as polypropylene fiber, polyethylene terephthalate fiber, or polyester-based fiber, and has sound insulation and heat insulation properties. The base material 11 is formed in a sheet shape with a size set to be disposed within the range of the target member, and is assembled to the target member by fixing means (not shown) such as press-fitting. On one side of the base material 11, a plurality (here, four) of electric wires 7 of the wire harness 3 are arranged in a predetermined shape. The terminal portions of the plurality of electric wires 7 arranged on the base material 11 are such that each electric wire 7 has a predetermined length and protrudes from the outer edge of the base material 11, and the connector 9 is disposed outside the base material 11.

[0017] The cover material 13 is made of, for example, a film such as vinyl chloride or polyethylene, an independent foam or continuous foam such as polyethylene, polypropylene, polystyrene, or elastomer, and has sound insulation and heat insulation properties. The cover material 13 has a size set to be equivalent to that of the base material 11 so as to be disposed within the range of the target member, and is formed in a sheet shape with a thickness set to be thinner than that of the base material 11. An adhesive is applied to the surface of the cover material 13 facing the base material 11, and the cover material 13 is attached to one side of the base material 11 so as to sandwich the base material 11 and the plurality of electric wires 7. In a state where the cover material 13 is integrally attached to the base material 11, a plurality of electric wires 7 arranged in a predetermined shape are held inside the base material 11 and the cover material 13. Therefore, the sound insulation member 5 can protect the electric wires 7 of the wire harness 3 and can maintain the arrangement shape of the electric wires 7.

[0018] The connector 9 exposed from the soundproof member 5 is fitted to the mating connector in a state where the wire harness assembly 1 is assembled to the target member. At this time, since the electric wire 7 has a predetermined length and is exposed from the outer edge of the soundproof member 5, the connector 9 can be moved freely, facilitating the fitting of the connector 9 and the mating connector. By fitting the connector 9 and the mating connector, the electrical components are electrically connected to each other.

[0019] In such a soundproof member 5 of the wire harness assembly 1, the cover material 13 is provided with a plurality of through holes 15. By providing the plurality of through holes 15 in the cover material 13, it is possible to absorb sound in a wider frequency range and improve the soundproof performance as compared with the cover material 13 not provided with the through holes 15. It is known that when the opening area of the plurality of through holes 15 becomes smaller with respect to the total area on one surface side of the soundproof member 5, the sound absorption property in the low frequency range becomes higher, and when the opening area of the plurality of through holes 15 becomes larger, the sound absorption property in the high frequency range becomes higher. Therefore, by setting the opening area of the plurality of through holes 15 according to the target frequency range, a desired soundproof performance can be obtained.

[0020] Here, in the conventional wire harness assembly, the plurality of through holes 15 were provided in the same shape over the entire surface on one surface side of the soundproof member 5, and the intervals between adjacent through holes 15, 15 were set to be the same. For this reason, in the conventional wire harness assembly, the plurality of through holes 15 formed an opening region having the same opening ratio per unit area in any part of the soundproof member 5. Here, the opening ratio per unit area is a ratio indicating how much the opening area of the through hole 15 occupies with respect to a predetermined area. That is, the opening ratio per unit area can be obtained by dividing the sum of the opening areas of the through holes 15 arranged in a predetermined range by the area of the predetermined range. In such a conventional wire harness assembly, the frequency range in which sound can be absorbed is the same in any part of the soundproof member 5, and there is a limit to the frequency range in which sound can be absorbed.

[0021] Therefore, in the wire harness assembly 1, the plurality of through holes 15 have a plurality of opening regions 17 with different opening ratios per unit area. In the following description, it is assumed that the plurality of through holes 15 are provided in the cover material 13, but the plurality of through holes 15 may be provided in the base material 11.

[0022] As shown in FIGS. 1 to 3, on the entire surface of the cover material 13, the plurality of through holes 15 have a plurality of opening regions 17 with different opening ratios per unit area. Here, for example, there are an opening region 17A, an opening region 17B, and an opening region 17C. In the opening region 17A, a plurality of large-diameter circular through holes 15 are provided, and the distance between adjacent through holes 15, 15 is set to be narrow. In the opening region 17B, a plurality of small-diameter circular through holes 15 are provided, and the distance between adjacent through holes 15, 15 is set to be wide. In the opening region 17C, one rectangular through hole 15 is provided.

[0023] Here, the opening region 17C has the highest opening ratio per unit area. The opening region 17A has the second highest opening ratio per unit area. The opening region 17B has the lowest opening ratio per unit area. Therefore, in each opening region 17, the frequency region that can absorb sound is different. In the soundproof member 5 having a plurality of opening regions 17, the sound in different frequency regions can be absorbed at the portions where the plurality of opening regions 17 are located, and the frequency region that can absorb sound is widened. Therefore, the soundproof member 5 can absorb sound in a wide frequency region and improve the soundproof performance. In addition, in the plurality of opening regions 17, since the shape of the through hole 15 and the distance between adjacent through holes 15, 15 are different, the opening ratio per unit area in the opening region 17 can be made different with a simple structure.

[0024] It should be noted that the electric wires 7 of the wire harness 3 disposed inside the soundproof member 5 are preferably disposed so as to avoid the plurality of through holes 15. By disposing the electric wires 7 so as to avoid the plurality of through holes 15, the electric wires 7 are not exposed from the soundproof member 5, and the soundproof member 5 can stably protect the electric wires 7.

[0025] In such a wire harness assembly 1, a wire harness 3 having an electric wire 7 and a connector 9 electrically connected to the terminal portion of the electric wire 7 is provided. Further, a soundproof member 5 having a base material 11 and a cover material 13 integrally provided on one surface side of the base material 11 is provided, and the wire harness 3 is disposed between the base material 11 and the cover material 13. Further, a plurality of through holes 15 are provided in at least one of the base material 11 and the cover material 13. And the plurality of through holes 15 have a plurality of opening regions 17 having different opening ratios per unit area.

[0026] In the soundproof member 5 in which the plurality of through holes 15 have the plurality of opening regions 17, sounds in different frequency regions can be absorbed at the portions where the plurality of opening regions 17 are located, and the frequency region in which sound absorption can be performed is widened. For this reason, the soundproof member 5 can absorb sound in a wide frequency region, and the soundproof performance can be improved.

[0027] Therefore, in such a wire harness assembly 1, the soundproof performance can be improved.

[0028] Further, in the plurality of opening regions 17, at least one of the shape of the through hole 15 and the interval between adjacent through holes 15, 15 is different.

[0029] For this reason, with a simple structure, the opening ratio per unit area in the opening region 17 can be made different.

[0030] As described above, the present embodiment has been described, but the present embodiment is not limited to these, and various modifications are possible within the scope of the gist of the present embodiment.

[0031] For example, in the wire harness assembly according to the present embodiment, the shape of the through hole is a perfect circle or a square, but it is not limited thereto. For example, the shape of the through hole may be any shape such as an ellipse or a polygon such as a triangle. For example, when the shape of the through hole is a square, the opening ratio per unit area can be increased as compared with the case where the shape of the through hole is a perfect circle and adjacent through holes are at the same interval.

[0032] In addition, the plurality of opening regions are three in the soundproof member, but it is not limited thereto. The plurality of opening regions in the soundproof member may be two or four or more.

[0033] Also, the plurality of through holes are provided in the cover material, but it is not limited thereto. In this case, it is not necessary to provide a plurality of through holes in the cover material, but through holes may be provided in the cover material so as to adjust the frequency range that can absorb sound. In addition, the thickness of the cover material or the base material may be adjusted according to the frequency range to absorb sound.

Explanation of Signs

[0034] 1 Wire harness assembly 3 Wire harness 5 Soundproof member 7 Electric wire 9 Connector 11 Base material 13 Cover material 15 Through hole 17 Opening region

Claims

1. A wire harness having a wire and a connector electrically connected to a terminal portion of the wire, A soundproof member having a base material and a cover material integrally provided on one surface side of the base material, the wire harness being disposed between the base material and the cover material, Comprising, At least one of the base material and the cover material is provided with a plurality of through holes, A wire harness assembly in which the plurality of through holes have a plurality of opening regions with different opening ratios per unit area.

2. The wire harness assembly according to claim 1, wherein at least one of the shape of the through hole and the interval between adjacent through holes is different among the plurality of opening regions.

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