JPH07277104A - Wire harness guiding device for steering - Google Patents

Abstract

PURPOSE:To prevent a deformation in a wire harness and generation of a noise by arranging a rigid wire part in the middle part of the wire harness and setting projecting length more than the maximum expansion stroke of the wire harness in the projection part from a harness port in the rigid harness part. CONSTITUTION:A middle part of a wire harness 1, which is arranged in a steering 2 having a telescopic mechanism and can be extended, is stored in a loop shape 8 from a harness port 7 of a harness case 4 to a harness loop part 3. In such a wire harness guiding device 6, a rigid wire part 10 is arranged in the advance/retraction part of the wire harness 1 to be inserted/withdrawn from the harness part 7. In other words, in the rigid wire part 10, an envelopingly fitting groove 11 in a rigid main body 9 is fitted around the outer circumference of the wire harness 1 so as to be fastened by means of a caulking piece 12. The length L2 of the rigid wire part 10 is set to be longer than the maximum extension stroke L1 of the wire harness 1. In this way, the wire harness 1 is prevented from being buckled and deformed when it is pushed in.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire harness guide device for a vehicle steering system having a telescopic mechanism for guiding and accommodating a wire harness that expands and contracts as the steering is adjusted.

[0002]

2. Description of the Related Art In a steering wheel having a telescopic mechanism, it is necessary to expand or contract (approximately 50 times) a wire harness wired to the steering wheel by adjusting a steering wheel position. Therefore, there is provided a wire harness guide device for accommodating the intermediate portion of the wire harness and allowing the wire harness to expand and contract with respect to the steering wheel. There is an example.

That is, the known example (see FIG. 4) is
The wire harness 1 is guided from the steering wheel 2 and comprises a harness case 4 which has a harness spool portion 3 for guiding and storing the intermediate portion of the wire harness 1 in a loop shape and a curved shape, and the loop shape of the wire harness 1 accommodated in the harness case 4. When the wire harness 1 pushed in from the harness opening 7 is guided and stored in the harness spool portion 3 or freely pulled out from the harness opening 7, the wire harness 1 can be expanded and contracted with respect to the steering wheel 2. It has a structure. In addition, 5 in the figure
Is a cover of the harness case 4.

[0004]

In the conventional wire harness guiding apparatus described above, the surplus portion of the wire harness 1 due to the adjustment of the steering 2 is pushed and stored from the harness opening 7, so that the wire harness 1 itself pushes the pushing force. Needs to be transmitted to the portion accommodated in the harness spool portion 3. However, since the wire harness 1 is composed of thin lead wires and is highly flexible, it lacks rigidity with respect to the pushing force in the longitudinal direction, and as shown in FIG. Then, a loop-shaped bulging deformation portion 15 is formed outside the harness opening 7, and the bulging deformation portion 1
There is a problem that 5 comes into contact with other equipment of the steering wheel 2 and interferes with the operation of the equipment, or causes abnormal noise during traveling.

The present invention provides a wire harness guide device that solves the above-mentioned drawbacks of the prior art.

[0006]

The wire harness guiding device of the present invention which solves the above technical problems is described as follows: "The intermediate portion of the wire harness disposed in the steering wheel having the telescopic mechanism is inserted into the harness opening to form a loop shape. In a wire harness guide device for a steering device, which has a harness spool portion that is housed in a curved shape and that allows the wire harness to extend and contract from the harness opening, a rigid columnar body is provided at an intermediate portion of the wire harness in a longitudinal direction of the wire harness. A rigid wire portion is provided alongside the rigid wire portion, and the rear end of the rigid wire portion is present in the wire harness opening in the maximum extension state in which the wire harness is pulled out from the harness opening, and the protruding portion from the harness opening is , A structure having a protruding length that is equal to or greater than the maximum expansion / contraction stroke of the wire harness.

As the rigid columnar body, a bar-shaped body, a cylindrical body or a plate-shaped body made of resin or metal is arbitrarily adopted and fixed to a wire harness. The rigid wire portion and the steering wheel may be connected by another rigid connecting member, and the rigid wire portion and the steering wheel may have an interlocking structure.

[0008]

In the wire harness guide device for a steering wheel of the present invention having the above-described structure, the steering wheel is adjusted so that the wire harness guide device is pushed into the harness spool portion from the harness opening.
Since the above-described rigid wire portion is present, the rigidity of the pushed-in portion of the wire harness that receives the pushing force for inserting it into the harness mouth is improved, and the buckling resistance is improved. Therefore, there is no possibility that a loop-shaped deformed portion of buckling deformation due to the pushing force will occur at the entrance portion of the harness opening, the wire harness passes straight through the harness opening, and the excess wire harness due to the steering adjustment, It can be smoothly guided and stored in the harness spool section.

[0009]

Embodiments will be described in detail below based on embodiments. First, referring to FIG. 1 showing a first embodiment of the present invention, an intermediate portion of a wire harness 1 which is disposed and extended in a steering wheel 2 having a telescopic mechanism is referred to as a harness case 4
A wire that expands and contracts the length of the wire harness 1 with respect to the steering 2 by changing the loop shape 8 from the harness opening 7 to the main harness spool portion 3 in a loop shape 8 by pulling out and pushing in from the harness opening 7. In the harness guide device 6, the rigid wire portion 1 is attached to the advance / retreat portion of the wire harness 1 that moves in and out through the harness opening 7.
0 is provided.

That is, the rigid wire portion 10 is provided with a holding groove 11 which is held on the outer periphery of the wire harness 1 in the longitudinal direction.
In addition, a rigid column body 9 made of a resin having a required rigidity is fixed along a predetermined position of the wire harness 1 by a caulking piece 12, and the rigid wire portion 10 constitutes a rigid elongated column. .

The rigid wire portion 10 (see (C) and (D) of FIG. 1) has a structure in which the wire harness 1 is pulled out to the steering 2 side at the maximum and the loop shape 8 becomes the minimum shape. Rear end 1 at maximum extension
4 exists in the harness opening 7, and the protruding length L2 from the harness opening 7 is larger than the maximum expansion / contraction stroke L1 of the wire harness 1 and the position along the wire harness 1 is provided.

In the above-described embodiment of FIG. 1, the rigid wire portion 10 has the above-mentioned structure, and the maximum extension stroke L of the wire harness 1 at the maximum extension of the wire harness 1.
Since the protrusion length L2 is greater than 1, when the wire harness 1 is pushed into the wire harness guide device 6 by adjusting the steering wheel 2 from its maximum extension state, the rigidity wire portion 10 protruding from the harness port 7 has rigidity. It functions as an elongated pillar and transmits the pushing force transmitted to the wire harness 1 to the wire harness 1 in the harness spool portion 3. Therefore, the wire harness 1 does not buckle to cause harmful loop-shaped bulging deformation at the entrance portion of the harness port 7 and is straight and smoothly pushed into the harness spool portion 3. It is possible to prevent the occurrence of abnormalities during running and the interference of peripheral devices due to the presence of deformation.

Next, another embodiment and another aspect of the present invention will be described with reference to FIGS. That is, the rigid columnar body 9 used for the rigid wire portion 10 may be a cylindrical body or a solid rod body as shown in FIG. 2, or a plate body as shown in FIG.
The wire harness 1 may be fixed along the wire harness 1 by any means such as a tape winding 15. Further, the rigid wire portion 10 may connect the steering 2 and the rigid columnar body 9 by the rigid connecting member 13 to form an interlocking structure with the steering 2. The interlocking structure of FIG. 3 is
Since the adjustment movement of the steering wheel 2 and the expansion and contraction of the wire harness 1 are completely interlocked with each other, the pushing-out operation of the wire harness 1 to the wire harness guide device 6 is further stabilized. In addition, 16 in the figure is a locking portion for connection.

[0014]

As described above, in the wire harness guide device for a steering wheel according to the present invention, the expansion / contraction guide storage of the wire harness becomes smooth and the bulging deformation in the middle of the wire harness is prevented due to the adjustment movement of the steering wheel. Therefore, it is effective in stabilizing the performance of the steering with the telescopic mechanism and preventing abnormal noise during traveling.

[Brief description of drawings]

1A and 1B show a wire harness guiding device for steering according to a first embodiment of the present invention, wherein FIG. 1A is a perspective view showing its configuration, and FIG. 1B is an enlarged perspective view of its rigid columnar body; (C) and (D) in the figure are plan views of the operating state.

FIG. 2 is a perspective view of a rigid columnar body of a wire harness guide device according to another embodiment of the present invention.

FIG. 3 is a partial perspective view of a wire harness guide device according to another embodiment of the present invention.

FIG. 4 shows a conventional wire harness guide device for steering, in which (A) is a perspective view showing its configuration, and (C) and (D) are plan views showing its working state. Cross section

[Explanation of symbols]

 1 Wire Harness 2 Steering 3 Harness Spool 4 Harness Case 6 Wire Harness Guide 7 Harness Mouth 8 Loop Shape 9 Rigid Column 10 Rigid Wire 11 Hugging 12 Caulking Piece 13 Connecting Member 14 Rear End 15 of Rigid Wire Tape Winding 16 Locking part

Claims (2)

[Claims] 1. A harness spool portion for inserting a middle portion of a wire harness arranged in a steering wheel having a telescopic mechanism into a loop shape and a curved shape by inserting it from a harness opening, and making the wire harness extendable from the harness opening. In a wire harness guide device for a steering wheel having, a rigid wire portion having a rigid column along the longitudinal direction of the wire harness is provided in an intermediate portion of the wire harness, the rigid wire portion extending from the harness opening to the wire harness. In the maximum extension state in which the wire is pulled out, the rear end is present in the harness opening, and the protruding portion from the harness opening has a protruding length that is equal to or greater than the maximum expansion / contraction stroke of the wire harness. Harness guidance device. 2. The wire harness guide device for a steering wheel according to claim 1, wherein the rigid wire portion and the steering wheel are connected by a rigid connecting member, and the steering wheel and the rigid wire portion are linked together.