JP5703773B2 - Wire harness - Google Patents

Description

  The present invention relates to a wire harness.

  When routing the wires of the wire harness, the wire harness may be provided with an expansion / contraction function and the extra length of the wire may be stored in a protector or the like. For example, in the device described in Patent Document 1, a plurality of wire insertion passages are formed in the protector, and the length of the wire harness can be adjusted by selectively causing the wires to fold along each wire insertion passage. Like to do.

JP 2000-215736 A

By the way, in the said conventional wire harness, while the protrusion which divides an electric wire insertion path is required in a protector, the lock structure for performing the lid | cover fastening of a protector is required. This complicates the configuration and increases the cost.
Moreover, when adjusting the length between the both ends of an electric wire, in the protector, the wiring structure of the electric wire with respect to each electric wire insertion path must be changed one by one, and there is a disagreement that the operation becomes complicated.

  The present invention has been completed based on the above-described circumstances, and it is an object of the present invention to simplify the configuration and improve the workability during length adjustment in a wire harness that can be adjusted in length. And

As means for achieving the above object, the invention of claim 1, a length adjustable wire harness, a wire having a first, second terminal, variable having first, second open end A tube portion made of a flexible resin tube , and the first terminal is inserted into the tube portion from the first opening end and pulled out of the tube portion from the second opening end. Is inserted into the tube portion from the second opening end and pulled out of the tube portion from the first opening end, so that the intermediate portion of the wire is accommodated and held in the tube portion in an intersecting state, When the extra length portion of the electric wire is circularly bent outside the tube portion, and the first and second terminals are moved closer to and away from each other, the intermediate portion of the electric wire is attached to the inner surface of the tube portion. in sliding contact, surplus portions of the electric wire is intended to expanded-diameter, of the wire During moiety has characterized in that is adapted to resiliently contact with the inner peripheral surface of the pipe portion by a spring-back action.

  According to a second aspect of the present invention, in the first aspect, when the first and second terminals are moved toward and away from each other, the relative position of the pipe portion between the first and second terminals varies. It has a feature.

<Invention of Claim 1>
The intermediate portion of the electric wire is accommodated and held in a crossed state in the pipe portion, and the extra length portion of the electric wire is circularly bent outside the pipe portion, so the length of the electric wire (first and second terminals) The linear distance between them is shortened. In addition, by moving the first and second terminals closer to and away from each other, the intermediate portion of the electric wire slides on the inner surface of the tube portion, and the extra length portion of the electric wire expands / contracts, so the change in the extra length portion The length of the electric wire is adjusted accordingly. In this case, it is sufficient to prepare a pipe portion as the length adjusting member, so that the configuration can be simplified. In addition, since the length is adjusted in conjunction with the contact and separation operations of the first and second terminals, workability is improved.

<Invention of Claim 2>
When the first and second terminals are moved toward and away from each other, the relative position of the pipe portion between the first and second terminals varies, so the movement amount (stroke amount) of the first and second terminals is small. However, the amount of expansion / contraction of the extra length portion can be increased, and the work efficiency is excellent.

In the wire harness which concerns on Embodiment 1 of this invention, an electric wire is a front view which shows the state currently hold | maintained by the pipe part in the shortened state. It is a front view which shows the state by which the electric wire is hold | maintained in the expansion | extension state by the pipe part. It is an assembly | attachment figure to the lance apparatus which shows the state in which the electric wire was accommodated in the shortened state. It is an exploded view of the lamp device which shows the state where the electric wire was extended in the extended state. In the wire harness which concerns on the reference example 1, it is a front view which shows the state by which the electric wire is hold | maintained in the shortened state. It is a front view which shows the state by which the electric wire is hold | maintained in the expansion | extension state. In the wire harness which concerns on the reference example 2, it is a front view which shows the state by which the electric wire is hold | maintained at the bar material in the shortened state. It is a front view which shows the state by which the electric wire is hold | maintained in the extending | stretching state by the bar.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. The wire harness according to the first embodiment includes an electric wire 10 and a pipe portion 60.

  The electric wire 10 is a covered electric wire in which a core wire is surrounded by an insulating coating. In the case of the present embodiment, a plurality of wires are bundled, and each electric wire 10 is integrated as a wire group 10 </ b> A so as not to be separated by a tape 20 wound around an appropriate portion in the length direction. One end in the length direction of the wire group 10A is the first terminal 11, and the other end in the length direction of the wire group 10A is the second terminal 12 (see FIG. 3). Each of the first and second terminals 11 and 12 is attached to an attachment member 90 such as a connector while being connected to a terminal or the like.

  The tube part 60 is a circular tube and is made of a flexible resin tube. In the case of this embodiment, the pipe part 60 is adjusted to a length of 1 cm to 3 cm, for example. Inside the tube portion 60 is a through hole 61 into which the wire group 10A is inserted, one end in the length direction of the tube portion 60 is a first opening end 62, and the other end in the length direction of the tube portion 60 is a second. An opening end 63 is provided.

  Here, the first terminal 11 of the electric wire group 10 </ b> A is inserted into the through hole 61 of the pipe portion 60 through the first opening end 62, and is further drawn out from the second opening end 63. On the other hand, the second terminal 12 of the electric wire group 10 </ b> A is inserted into the through hole 61 of the pipe part 60 through the second opening end 63, and is further pulled out from the first opening end 62. Thereby, the intermediate portions 13A and 13B of the wire group 10A are accommodated in the through hole 61 of the tube portion 60 in an intersecting state, and a predetermined frictional force is applied to the inner peripheral surface of the through hole 61 by the springback action of the wire group 10A. It comes to contact elastically.

  In the state where the first and second terminals 11 and 12 are inserted into the tube portion 60 so as to cross each other, the extra length portion 14 of the electric wire group 10A is turned in an annular shape outside the tube portion 60. It becomes. The intermediate portions 13A and 13B of the electric wire group 10A are paired at both sides sandwiching the extra length portion 14, and the first intermediate portion 13A on the first terminal 11 side and the second intermediate on the second terminal 12 side. It is comprised with the part 13B.

Next, the usage situation of the wire harness which concerns on this embodiment is demonstrated.
The first and second terminals 11 and 12 penetrating through the pipe portion 60 are attached to the attachment member 90. In the case of the present embodiment, the wire harness is incorporated in a lamp device 50 such as a headlamp of an automobile (see FIG. 3). The lamp device 50 includes a lamp chamber 53 defined by a lamp body 51 and a lamp cover 52, a reflector 54 and a lens 55 as a light source disposed in the lamp chamber 53, and a lamp from the periphery of the lens 55 in the lamp chamber 53. An extension 56 extending to the cover 52 is provided. The wire harness is also disposed in the lamp chamber 53, and one end (one of the first and second terminals 11 and 12) is connected to the reflector 54, and the other end (the first and second terminals 11 and 12). Any one of 12) penetrates the lamp body 51 and is connected to the connector 40 on the vehicle side.

  As described above, the wiring harness wiring space is restricted to a limited range in the lamp chamber 53. For this reason, in the state assembled | attached in the lamp apparatus 50, it is calculated | required that 10 A of electric wire groups are accommodated in the shortened state which shortened the length (The linear distance between the 1st, 2nd terminals 11 and 12). . On the other hand, in the process of assembling or removing, the electric wire group 10A is required to be in an extended state in which the length is increased for convenience of work (see FIG. 4).

  In order to bring the electric wire group 10A into a shortened state, the first and second terminals 11 and 12 may be displaced so as to approach each other. Then, the first and second intermediate portions 13A and 13B are slidably contacted with each other, and the first and second intermediate portions 13A and 13B are slidably contacted with the inner peripheral surface of the through hole 61 of the pipe portion 60. 14 is expanded. When the length of the extra length portion 14 becomes longer in the circumferential direction in this way, the length of the electric wire group 10A is shortened according to the operation amounts of the first and second terminals 11 and 12 (see FIG. 1). In the assembled state, the extra length portion 14 of the wire group 10 </ b> A is fixed to the lamp body 51 by the clip 58.

  On the other hand, in order to bring the electric wire group 10A into the extended state, the first and second terminals 11 and 12 may be displaced in directions away from each other. Then, the first and second intermediate portions 13A and 13B are slidably contacted with each other, and the first and second intermediate portions 13A and 13B are slidably contacted with the inner peripheral surface of the through hole 61 of the pipe portion 60. 14 is reduced in diameter. When the length of the extra length portion 14 is shortened in the circumferential direction in this manner, the length of the electric wire group 10A is extended according to the operation amounts of the first and second terminals 11 and 12 (see FIG. 2).

  When the wire group 10A is in a shortened state or an extended state, the first and second intermediate portions 13A and 13B elastically contact the inner peripheral surface of the through hole 61 of the tube portion 60, so that the wire group 10A is in a shortened state. Alternatively, it is held in an extended state. Further, along with the displacement operation of the first and second terminals 11 and 12, the entire pipe part 60 is pushed and pulled along the electric wire group 10A, and the relative position of the pipe part 60 between the first and second terminals 11 and 12 is increased. fluctuate. For this reason, the expansion / contraction operation | movement of the surplus length part 14 is made more than the displacement amount (stroke amount) of the 1st, 2nd terminals 11 and 12. FIG.

  As described above, according to the present embodiment, when the length of the wire group 10A of the wire harness is adjusted, it is sufficient to prepare the tubular tube portion 60 as the length adjusting member. Realized. Further, since the length adjustment is performed in conjunction with the displacement operation of the first and second terminals 11 and 12, workability at the time of length adjustment is improved.

  Furthermore, when the first and second terminals 11 and 12 are moved closer to and away from each other, the relative position of the pipe portion 60 between the first and second terminals 11 and 12 varies, so the first and second terminals 11 and 11 Even if the movement amount of 12 is small, the enlargement / reduction amount of the extra length portion 14 can be increased, and the working efficiency is excellent.

<Reference Example 1>
5 and 6 show Reference Example 1. FIG. Unlike Embodiment 1, this thing does not have the pipe part 60, but is comprised only by the electric wire group 10A of a wire harness.

  The electric wire group 10 </ b> A is single-bound at the intermediate portions 13 </ b> A and 13 </ b> B, and is held at a predetermined length by the frictional resistance of the knot 19 portion. If the first and second terminals 11 and 12 are brought closer to each other, the extra length portion 14 is expanded, and if the first and second terminals 11 and 12 are separated from each other, the extra length portion 14 is reduced in diameter. Is the same as in the first embodiment. However, since the reference example 1 does not have the pipe part 60, compared with the first embodiment, there is a lack of smoothness of the expansion and contraction operation.

<Reference Example 2>
7 and 8 show Reference Example 2. FIG. This includes an electric wire group 10A, a plurality of rod-like portions 71 arranged along the electric wire group 10A while being spaced apart in the length direction of the electric wire group 10A, both ends of each rod-like portion 71 and the electric wire group 10A. A fixing portion 72 such as a tape that is wound to fix the two is provided. The rod-like portions 71 are arranged to have substantially the same length, and the rod-like portions 71 of the electric wire group 10A are arranged at substantially the same interval. In the electric wire group 10 </ b> A, a portion supported by each rod-like portion 71 is a hard portion 73, a portion between each rod-like portion 71 is a flexible portion 74, and a portion between the hard portion 73 and the flexible portion 74 is a node portion 75. The

  Here, when the first and second terminals 11 and 12 are displaced toward each other, the wire group 10A is folded around the node 75 as a substantially fulcrum, and the wire group 10A is held in a shortened state. At this time, the hard part 73 is kept in a state of extending linearly by the respective bar-like parts 71, and the flexible part 74 is kept in a state of being bent in a substantially U shape (see FIG. 7). On the other hand, when the first and second terminals 11 and 12 are displaced in directions away from each other, the bent state of the flexible portion 74 is released, and the electric wire group 10A is held in an extended state as a whole (FIG. 8). See). In Reference Example 2, although the wire harness can be compactly gathered in a shortened state, there is a discomfort in the configuration as compared with Embodiment 1.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) The electric wire may consist of only one.
(2) The present invention can be applied to other than wire harnesses arranged in the lamp device.

DESCRIPTION OF SYMBOLS 10 ... Electric wire 10A ... Electric wire group 11 ... 1st terminal 12 ... 2nd terminal 13A ... 1st intermediate part (intermediate part)
13B ... 2nd intermediate part (intermediate part)
14 ... extra length part 60 ... pipe part 62 ... 1st opening end 63 ... 2nd opening end

Claims (2)

A wire harness with adjustable length,
An electric wire having first and second terminals;
A tube portion made of a flexible resin tube having first and second open ends,
The first terminal is inserted into the tube portion from the first opening end and pulled out of the tube portion from the second opening end,
The second terminal is inserted into the tube portion from the second opening end and pulled out of the tube portion from the first opening end,
While accommodating and holding the intermediate portion of the electric wire in the tube portion in an intersecting state, and having a state in which the extra length portion of the electric wire is circularly bent outside the tube portion,
When the first and second terminals are approached / separated from each other, the intermediate portion of the electric wire is in sliding contact with the inner surface of the tube portion, and the extra length portion of the electric wire is expanded or reduced in diameter , A wire harness characterized in that an intermediate portion of the electric wire is elastically brought into contact with an inner peripheral surface of the tube portion by a springback action .   The wire harness according to claim 1, wherein the relative position of the pipe portion between the first and second terminals varies when the first and second terminals are moved toward and away from each other.

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