JP2003032868A - Wiring harness excessive length storing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To providing a wiring harness excessive length storing apparatus which can expand and contract an excessive length part of a wiring harness regularly and smoothly according to the movement of a moving object such as a tilting mechanism of a steering column of a car, etc., while the number of components, the weight, and hence the dimensions of the apparatus are reduced. SOLUTION: An excessive length S provided in a middle of a wiring harness 10 is expanded and contracted according to the movement of a tilting mechanism, a telescopic mechanism, etc., of a car and the expansion/contraction movement is helped by the expansion/contraction movement of an arch-shaped wiring harness holding elastic plate 21 which is produced by the elastic deformation. That is, an apparatus, in which the excessive length S of a wiring harness is housed in an absorbed state, has the arch-shaped wiring harness holding elastic plate 21 as its main part and has a very compact structure. When the wiring harness 10 is drawn out in a wiring direction and expanded or contracted and restored to an original position, the wiring harness holding elastic plate 21 is elastically deformed from the contracted state to the expanded state and vice versa, and helps the excessive length S of the wiring harness to be expanded and contracted regularly and smoothly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire harness surplus length absorbing device for absorbing and accommodating a surplus length portion provided so that a wiring wire harness can be expanded and contracted in the length direction thereof by following the movement of a moving body. Regarding

[0002]

2. Description of the Related Art In an automobile, for example, when a wire harness is routed from a vehicle body to a door panel,
The wire harness is pulled out in the length direction and extended or contracted to be displaced in accordance with the door opening / closing operation. Also in the driver's seat steering system, the wire harness installed in the steering column
The height and angle of the steering wheel, and the axial length of the steering wheel are adjusted according to the driver's physique and posture, and the tilt mechanism and telescopic mechanism are adjusted to expand and contract. An extra length portion that allows for the length of expansion and contraction of such a wire harness is provided in the middle of the harness to accommodate the movement of moving bodies such as the door and the tilt mechanism.

As an extra length portion provided in the wire harness,
It is necessary to make it in a contracted state during normal conditions and absorb it compactly. Many proposals have been made so far for devices that absorb the extra harness portion. For example, it can be found in Japanese Utility Model Laid-Open No. 63-32527 and Japanese Patent Application Laid-Open No. 3-7639, and the applicant of the present invention also discloses Japanese Patent Application Laid-Open No. 5-315423 and Japanese Patent Application Laid-Open No. 8-2564.
No. 23 publication and the like. As a form common to the techniques disclosed in these publications, the wire harness is loosened in a loop shape with a length commensurate with expansion and contraction to form an extra length, and the wire harness is pulled out or pushed back by the action of the moving body. The extra length of the harness absorbs changes in the length of the harness.

[0004]

By the way, since the harness extra length portion may lack the rigidity of the harness itself and the strength of the waist, and is loosened in a loop shape,
When the moving body operates and is pulled out or pushed back, it cannot perform a regular expansion and contraction operation, which causes flapping and abnormal noise. Heretofore, various structures have been proposed for imparting regularity to the extension / contraction operation of the extra harness portion in order to eliminate such problems.

In the case of the technique disclosed in Japanese Unexamined Patent Publication (Kokai) No. 8-256423, the extra harness portion slackened in a loop shape is housed in a casing or a protective protector to give a regular extension / contraction operation. . Further, in order to make the expansion and contraction operation smooth, one end side of the extra harness portion is locked on the slide strip, and the slide strip is guided by the guide rails to reciprocate. As an example of mounting this structure on an actual machine, we have disclosed a tilt mechanism and a telescopic mechanism equipped on a steering column of an automobile.The harness extra length is extended and pushed back or pushed back in accordance with the motion of the moving body by such a mechanism. The expansion / contraction operation of contracting the shape is performed via the slide strip.

[0006] However, in order to obtain regularity and smoothness in the extension / contraction operation of the extra harness portion, such members as the casing, the protective protector, the slide band plate and the guide rails for guiding the same are specially provided. Therefore, the device configuration becomes complicated due to an increase in the number of parts and weight, and it is disadvantageous to adopt it in an automobile which is severely restricted by an installation space and an increase in weight as well as cost.

Therefore, an object of the present invention is to reduce the number of parts and weight in order to smoothly extend and retract the extra length portion of the wire harness in accordance with the operation of the moving body such as the tilt mechanism of the automobile steering column. An object is to provide a wire harness excess length absorbing device that can be made compact.

[0008]

In order to solve the above-mentioned problems, in the wire harness surplus length absorbing device according to the first aspect of the present invention, the wired wire harness 10 is arranged so that the moving body operates in the longitudinal direction. A device for providing a surplus portion S in the middle of the wire harness 10 so as to be able to follow and expand and displace, and absorb and store the surplus portion S of the harness. When the harness 10 is pulled out or pushed back, an arch-shaped harness holding elastic plate 21 that expands and contracts elastically in the wiring direction by the harness pulling force or the harness pushing-back force is provided. It is characterized in that the retained harness extra length portion S is configured to be expanded and contracted in a regular manner in the wiring direction.

From the above, the device according to the first aspect operates as follows. The device is an arch-shaped harness holding elastic plate 2
1 is the main component and is very compact. For example, the wire harness 10 is pulled out in the wiring direction and expanded or contracted to follow the operation of a moving body such as a tilt mechanism or a telescopic mechanism mounted on the steering column 1 of the automobile shown in FIG. Return to. The change in harness length at that time is absorbed by the expansion / contraction operation of the extra harness length portion S. The harness holding elastic plate 21 is elastically deformed in the wiring direction from the contracted state to the expanded state or vice versa by the harness pulling force or the harness pushing-back force, and the harness excess length S
Assists the expansion and contraction of the to provide regularity in the installation direction, allowing smooth operation.

In the wire harness surplus length absorbing device according to the second aspect, one of the arch-shaped both ends of the harness holding elastic plate 21 is a fixed end in the first embodiment shown in FIGS. The other is a movable end, and the movable end is elastically deformed in a direction in which the movable end is expanded by a harness pulling force.

From the above, the device according to the second aspect operates as follows. 2 and 3, the harness-holding elastic plate 21 has, for example, a bracket 22 at one end of an arch shape.
When the wire harness 10 is pulled out by moving a moving body such as a tilt mechanism or a telescopic mechanism, the other end of the arch shape is opened by the harness pulling force. The movable end is deformed in the direction of expanding with respect to the fixed end against the elasticity.
Further, when the moving body operates and the wire harness 10 is pushed back, the harness pushing-back force causes the arch-shaped movable end to contract by its own elasticity to restore the original shape.
Only by the harness holding elastic plate 21 performing an extremely simple elastic expansion / contraction deformation, the extension / contraction operation of the extra harness length S can be made regular and smooth.

In the wire harness surplus length absorbing device according to a third aspect of the present invention, the intermediate portion 13 of the harness surplus portion S is locked to the locking hook 23 provided inside the arch-shaped top of the harness holding elastic plate 21. It is characterized in that the elastic plate is held inside the elastic plate, or the intermediate portion 13 of the extra harness length S is locked to the arch-shaped top portion by the binding band 27 and held inside the elastic plate.

From the above, the device according to claim 3 operates as follows. In the first embodiment shown in FIGS. 2 and 3, the extra harness length S is held along the inside of the harness holding elastic plate 21, and the intermediate portion 13 of the extra harness length S is formed into an arch-shaped top. Locking hook 23 provided inside
It is possible to prevent the intermediate portion 13 from falling off and to perform the stretching operation with regularity and smoothness. Further, in the second embodiment shown in FIG. 6, instead of the locking hook 23 of the first embodiment, a cord material such as a binding band 27 is used to directly connect the intermediate portion 13 of the extra harness length S to the arch-shaped top portion. It is possible to prevent the intermediate portion 13 from falling off by binding it to the inside of the. In this manner, by holding the extra harness length portion S on the “inside” of the harness holding elastic plate 21, that is, by forming the extra harness length portion S from the outside by being protected by the harness holding elastic plate 21, It is possible to prevent the extra harness portion S from interfering with and contacting the body-side housing or the like, and generating an abnormal noise due to an impact force due to the contact. Therefore, the harness holding elastic plate 21 also serves as a member such as a conventional protection protector, which reduces the number of members accordingly.

Further, in the wire harness surplus length absorbing device according to a fourth aspect of the present invention, in the third embodiment shown in FIG. 7, the arch-shaped top of the harness-holding elastic plate 21 is fixed to the moving-body storage housing, and the arch. Both ends of the shape are movable ends that are open, respectively, and the movable ends at the both ends are elastically deformed in a direction in which they are relatively expanded by the harness pulling force.

From the above, the device according to the fourth aspect operates as follows. In this case, by fixing the arch-shaped top portion of the harness holding elastic plate 21 to the machine body side such as the moving body storage housing with the bracket 28, and making both end portions of the arch shape open movable ends, the extra harness length portion is formed. Since the expansion / contraction operation of S is performed not only on the one end side 12 but also on the other end side 14, the degree of freedom in increasing the expansion / contraction amount can be increased.

Further, in the wire harness surplus length absorbing device according to the present invention, one end side and the other end side of the harness surplus length portion S are engaged with the respective arch-shaped end portions of the harness holding elastic plate 21. Guide recesses 21a, 21 for guiding and regulating
b is provided.

From the above, the device according to the fifth aspect operates as follows. In this case, it is common to all of the first embodiment shown in FIGS. 2 and 3, the second embodiment shown in FIG. 6, and the third embodiment shown in FIG.
In each of the harness holding elastic plates 21 to 4, guide recesses 21a and 21b are provided at both ends of the arch shape. By engaging the one end side 12 and the other end side 14 of the extra harness length S with the guide recesses 21a and 21b, the harness hooks 23 cooperate with the locking hooks 23 on the arch-shaped top to guide the harness such as three-point support. The extension / contraction operation of the extra length portion S is regulated so as to be along the wiring direction so as to have regularity, and the extension / contraction operation can be smoothly performed.

Further, the wire harness surplus length absorbing device according to a sixth aspect of the invention is different from the fourth embodiment shown in FIGS. 8 and 9 in that the harness holding elastic plate 31 in this case is provided on the outer side of each arch-shaped end portion. Provided locking arms 32, 33
The one end side 12 and the other end side 14 of the extra harness portion S are engaged with each other, and the intermediate portion 13 is held along the outer peripheral surface of the arch shape.

From the above, the device according to the sixth aspect operates as follows. In each of the first to third embodiments shown in FIGS. 2 to 7, the extra harness length S is held inside the elastic plate along the inner circumference of the arch shape of the harness holding elastic plate 21. In the fourth embodiment, by holding the extra harness portion S along the arch-shaped outer peripheral surface of the harness holding elastic plate 31, the intermediate portion 1 of the extra harness portion S is held.
The bending radius of No. 3 is relatively large, and bending fatigue can be avoided more than in the case of a small radius.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a wire harness surplus length absorbing device according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view showing a mounting example of an actual device in which the device of the embodiment is mounted on a steering column 1 of an automobile. The steering column 1 is provided with an ignition switch, a turn signal switch, and a wire harness 10 which is a bundled wire, which is connected to various electric components such as a blinking light and a blinker (Winker). .

In the steering column 1, the tilt position is adjusted by adjusting the height position and angle of the steering wheel 2 according to the driver's physique and preferred posture by a tilt mechanism to operate in the direction of arrow P in the figure. Further, the axial length position of the steering wheel 2 can be adjusted by operating the telescopic mechanism in the direction of arrow Q in the figure.

In FIG. 1, reference numeral 3 is a combination switch unit to which the terminal of the wire harness 2 is connected by a connector, and reference numeral 4 is a steering shaft.

Therefore, the wire harness 10 arranged in the steering column 1 can freely move in the longitudinal direction by following the tilting movement of the steering wheel 2 in the P direction and the telescopic movement in the Q direction as described above. It is required to expand and contract. That is, in FIG. 1, one end side 11 of the wire harness 10 is connected to a power supply circuit via a connector or the like, and the other end side 15 is pulled out and pushed back by a tilt operation or a telescopic operation. Therefore, a harness extra length portion S that absorbs the length of expansion and contraction of the pulling out or pushing back operation of the wire harness 10 is provided in the middle, and when the wire harness 10 is pushed back, the harness extra length portion S is removed. The wire harness surplus length absorbing device according to the first to fourth embodiments for contracting and absorbing is provided below.

2 to 5 show a wire harness surplus length absorbing device 20 according to the first embodiment, FIG. 2 is an assembled perspective view, FIG. 3 is an exploded perspective view, and FIG. 4 is an arrow AA of FIG. 5A and 5B are side views showing two states of the extra harness length S, that is, the contracted state and the expanded state, respectively.

2 and 3, the device 20 is
A harness holding elastic plate 21 curvedly formed in an arch shape with an elastic material such as plastics or metal is provided as a main portion, and the harness extra length portion S is held so as to be wrapped around the inner peripheral side of the arch shape.

At both ends of the arch shape of the harness holding elastic plate 21, guide recesses 21a and 21b having a harness holding function and a restraining property are provided, and one end of the extra harness length S is provided in the guide recesses 21a and 21b. The side 12 and the other end side 14 are engaged with each other to guide and regulate the movement and direction. A bracket 22 having a spindle hole 22a is integrally provided at a position adjacent to the guide recess 21a on the one end side of the arch-shaped harness holding elastic plate 21. Correspondingly, the pin-shaped nut 25 is provided on the side wall 24 of the casing constituting the steering column 1 shown in FIG.
Is provided, and the bracket 22 is supported by the lock hole 26 such as a bolt or a set screw to be screwed into the support shaft hole 22.
It is fastened and fixed with a. Thus, the arch-shaped one end of the harness holding elastic plate 21 is the "fixed end" in the present invention.

On the other hand, the other end side of the arch of the harness holding elastic plate 21 is a "movable end" in the present invention which is opened, and is deformed in a direction to expand the arch-shaped original shape by utilizing elasticity. It is possible. That is, by engaging the other end side 14 of the extra harness length S with the guide recess 21b provided at the movable end, the harness pulling force from the other end side 15 of the wire harness 10 in accordance with the operation of the moving body, etc. With, the movable end is deformed together in the expansion direction and made to follow. As a result, the movement of the other end side 14 of the extra harness portion S has regularity and is regulated so that the movement is smooth.

Further, the U-turn portion corresponding to the arch-shaped top portion of the harness holding elastic plate 21 is provided with a locking hook 23 on the inner peripheral side thereof, and the intermediate portion 13 held in the ridge of the extra harness length portion S is provided. It passes through the locking hook 23.
Therefore, the claw portion 23a at the tip of the hook prevents the harness intermediate portion 13 from falling off, and at the same time provides the movement and direction with regularity. Holds smoothly.

With the above construction, the wire harness surplus length absorbing device 20 of the first embodiment operates and operates as shown in FIGS. 5 (a) and 5 (b).

As shown in FIG. 5A, when the wire harness 10 is in the normal state in which it is pushed back in the wiring direction by the operation of a moving body such as a tilt mechanism or a telescopic mechanism, the harness holding elastic plate 21 has an arch shape. The original shape in which the extra harness portion S is absorbed and held in a contracted state is stopped on the inner peripheral side.

When the tilt mechanism or the telescopic mechanism is operated by the driver's operation and the moving body pulls the wire harness 10 in the direction of pulling it out from the other end side 15, the harness pulling force causes the movable end of the harness holding elastic plate 21 to move. It is elastically deformed in the direction in which the arch shape is expanded through the other end side 14 of the extra harness portion S [FIG. 5 (b)]. The extra harness length portion S extends along with the expansion deformation of the harness holding elastic plate 21, and is pulled out according to the amount of movement of the moving body.

On the other hand, when the moving body returns to the position where the wire harness 10 is pushed back in the wiring direction, the wire harness 1
The harness pulling force acting on the other end side 15 of 0 is released, and the movable end of the harness holding elastic plate 21 restores in the contracting direction to return to the arch-shaped original form by its own elasticity.
The extra harness length S is contracted to its original shape in accordance with the contraction operation of the harness holding elastic plate 21, and is returned and accommodated.

During such expansion and contraction of the extra harness portion S, one end side 12 and the other end side 15 of the harness holding elastic plate 21 have guide recesses 21a at the fixed end and the movable end, respectively.
21b, and the intermediate portion 13 of the extra harness portion S
Is also guided by the locking hook 23. Thereby, regularity is given to the extension / contraction operation and the direction of the extra harness length S, and the operation is smoothly performed.

Next, FIG. 6 shows a wire harness surplus length absorbing device 20 according to a second embodiment of the present invention, which should also be referred to as a modification of the first embodiment.

In the second embodiment, a binding band 27 is used in place of the locking hook 23 shown in FIGS. 2 to 5 of the first embodiment. That is, on the inner peripheral side of the portion corresponding to the arch top of the harness holding elastic plate 21, the intermediate portion 13 of the extra harness length S is tied and fixed. Thereby, the same action as that of the first embodiment by the locking hook 23 can be obtained. That is, by holding the extra harness portion S inside the harness holding elastic plate 21, that is, by forming the extra harness portion S from the outside by being protected by the harness holding elastic plate 21, the extra harness portion is provided. It is possible to prevent S from interfering with and contacting the body-side casing or the like, and generating an abnormal noise due to an impact force due to the contact. Therefore, the harness holding elastic plate 21 also serves as a member such as a conventional protective protector and is an effective member for reducing the number of members.

Next, FIG. 7 shows a wire harness surplus length absorbing device 20 according to a third embodiment of the present invention.

In the third embodiment, a bracket 28 is provided on the outer circumference of the portion corresponding to the top of the arch-shaped harness holding elastic plate 21, and the steering column 1 of FIG. The structure is fixed to the housing side wall 24. That is, in this case, both arch-shaped ends of the harness-holding elastic plate 21 are “movable ends” according to the present invention that are open, and the housing is provided in the support shaft hole 28a provided in the bracket 28 at the top of the arch. Fastening is performed through a pin-shaped nut 25 provided on the side wall 24 and a lock pin 26 such as a bolt or a set screw screwed with the pin-shaped nut 25. As a result, the movable ends on the left and right sides expand and contract in the relative direction in a regular manner in accordance with the expanding and contracting motion of the extra harness length S, with the fastening portion by the bracket 28 as a fulcrum. Each of the movable ends at both ends of the arch is provided with guide recesses 21a and 21b at the ends thereof, and the extra harness portion S is provided.
The one end side 12 and the other end side 14 are engaged with each other to guide the expansion / contraction operation to have regularity and smoothness.

With the above-described structure, in the third embodiment, when the tilt mechanism or the telescopic mechanism is operated by the driver's operation and the moving body is moved in the direction in which the wire harness 10 is pulled out, the movement of the tilting mechanism or the telescopic mechanism is synchronized with the movement. The wire harness 10 is pulled from the other end side 15. The harness pulling force elastically deforms the movable ends at both ends of the arch of the harness holding elastic plate 21 in a direction in which they are relatively expanded. The extra harness length portion S extends along with the expansion deformation of the harness holding elastic plate 21, and is pulled out according to the amount of movement of the moving body.

On the other hand, when the moving body returns to the position where the wire harness 10 is pushed back in the wiring direction and returns, the harness pulling force acting on the other end 15 of the wire harness 10 is released and the harness holding elastic plate 21 is released. The movable ends at both ends of the arch are restored to the original arch original shape in the contracting direction by their own elasticity. The harness holding elastic plate 2
The extra harness length S is returned to the original shape and accommodated in accordance with the contracting operation of 1.

Therefore, in this third embodiment, since the one end side 12 and the other end side 14 of the extra harness portion S simultaneously expand and contract in the relative directions to both sides at the same time, one end side of the arch of the harness holding elastic plate 21 is fixed. Compared with the case of the above-described first and second embodiments in which the fixed end is formed, the degree of freedom of expansion and contraction of the extra harness length S corresponding to the operation of the moving body can be increased.

Next, FIGS. 8 and 9 show a wire harness surplus length absorbing device 30 according to a fourth embodiment of the present invention.

In the fourth embodiment, locking arms 32 and 33 are provided on the outer sides of both ends of the arch of the arch-type harness holding elastic plate 31, respectively, and the guide recess 21a of the first to third embodiments is provided. , 21b.
That is, in this case, the extra harness length S is held along the arch-shaped outer circumference of the harness holding elastic plate 31. One end side 12 and the other end side 14 of the extra harness portion S are engaged with the locking arms 32 and 33, and the claw portions 32a at the tip of the arm,
The 33a prevents falling off, and guides with regularity and smoothness.

Although not shown in FIGS. 8 and 9, the harness holding elastic plate 31 is attached to the side wall 24 (see FIG. 2) of the housing constituting the steering column 1 and the like in FIG. 1 at the arch top, for example. It shall be fixed via a bracket or the like.

With the above construction, the fourth embodiment operates and operates as follows. That is, the extra harness length S is carried along the arch-shaped outer peripheral surface of the harness holding elastic plate 31. As a result, the bending radius of the intermediate portion 13 of the extra harness length portion S becomes larger than that in the case of holding the harness holding elastic plate 21 by wrapping it around the inner peripheral side of the harness holding elastic plate 21 as in the first to third embodiments. It is possible to avoid bending fatigue more than a small radius. The expansion / contraction operation of the extra harness portion S in accordance with the operation of the moving body and the expansion / contraction operation utilizing the elastic deformation of the harness holding elastic plate 31 are substantially the same as those described in the first to third embodiments.

As described in the first to fourth embodiments, the tilt mechanism and the telescopic mechanism mounted on the steering column 1 of the automobile as the moving body in the present invention have been assumed and described. The moving body example is not limited to such a mechanism. For example, in an automobile, in addition to the above-mentioned body doors, sliding seats in the passenger compartment,
The application examples are wide-ranging, such as an instrument panel, an audio unit, an air conditioner unit, and a meter unit.

[0046]

As described above, the wire harness surplus length absorbing device according to the first aspect of the present invention is very compact because the arch-shaped harness holding elastic plate is the main component. For example, when following the movement of a moving body such as a tilt mechanism or a telescopic mechanism equipped in a steering column of an automobile, when the wire harness is pulled out in the wiring direction and expanded, or when it contracts and returns to its original position, The change in harness length is absorbed by the expansion / contraction operation of the extra harness length. The harness holding elastic plate is elastically deformed in the wiring direction from the contracted state to the expanded state or vice versa by the harness pulling force or the harness pushing force, and assists the expansion / contraction operation of the extra harness length S to regulate the wiring direction. It can be operated smoothly.

Further, in the wire harness surplus length absorbing device according to the second aspect, one end of the harness-holding elastic plate has an arched shape and is a fixed end fixed to the casing on the machine side, for example, by a tilt mechanism. When a moving body such as a telescopic mechanism operates and the wire harness is pulled out, the harness pulling force deforms the movable end, which is the other open end of the arch, against the elasticity and expands to the fixed end. To do. Further, when the wire harness is pushed back and the moving body moves in a direction in which the extra harness portion is contracted, the arch-shaped movable end is contracted by its own elasticity by the harness pushing-back force to restore the original shape. That is, it is possible to give regularity and smoothness to the extension / contraction operation of the extra harness portion only by performing the extremely simple elastic expansion / contraction deformation of the harness holding elastic plate.

In the wire harness surplus length absorbing device according to a third aspect of the present invention, the harness surplus portion is held along the inside of the harness holding elastic plate, and the intermediate portion of the harness surplus portion has an arch-shaped top portion. By hooking on the locking hook provided on the inside, it is possible to prevent the intermediate part from falling off, and to perform the stretching operation with regularity and smoothness. Further, instead of the locking hooks, a cord material such as a binding band may be used to tie the intermediate portion of the extra harness length portion directly to the inside of the arch-shaped top portion to prevent the intermediate portion from falling off. In this way, by holding the extra harness portion on the “inside” of the harness holding elastic plate, that is, by protecting the extra harness portion from the outside by the harness holding elastic plate, the extra harness portion is provided. Can be prevented from interfering with the fuselage-side housing or the like and causing abnormal noise due to the impact force caused by the contact. Therefore, the harness holding elastic plate also serves as a member such as a conventional protective protector, which reduces the number of members.

In the wire harness surplus length absorbing device according to a fourth aspect of the present invention, the arch-shaped top of the harness holding elastic plate is fixed to the machine body side such as a moving body storage housing with a bracket, for example.
Since both ends of the arch shape are movable ends that are open, the extra length of the harness can be expanded and contracted not only on one end side but also on the other end side. It is valid.

According to a fifth aspect of the present invention, in the wire harness surplus length absorbing device, in each of the harness holding elastic plates according to the first to fourth aspects, one end side of the harness surplus length portion is provided in a guide recess provided at both arch-shaped end portions. By engaging the other end side with
In cooperation with the arch-shaped top locking hook, guides such as three-point support, and restricts the extension / contraction movement of the extra harness length along the wiring direction to provide regularity and smooth extension / contraction movement. The effect is doubled.

Further, in the wire harness surplus length absorbing device according to a sixth aspect of the present invention, the harness surplus portion is held along the arched outer peripheral surface of the harness holding elastic plate, so that the intermediate portion of the harness surplus portion is held. The bending radius of becomes relatively large,
The bending fatigue can be reduced as much as in the case of a small radius.

[Brief description of drawings]

FIG. 1 is a plan view showing a wire harness surplus length absorbing device according to the present invention and a steering column of an automobile as an example of a moving body equipped with this device.

FIG. 2 is an assembled perspective view showing a wire harness surplus length absorbing device according to the first embodiment.

FIG. 3 is an exploded perspective view showing a wire harness surplus length absorbing device according to the first embodiment.

FIG. 4 is an assembled vertical sectional view taken along the line AA in FIG.

5 (a) and 5 (b) are side views showing two states, a contracted state and an expanded state, of the extra harness portion in the first embodiment.

FIG. 6 is an assembled perspective view showing a wire harness surplus length absorbing device according to a second embodiment.

FIG. 7 is an assembled perspective view showing a wire harness surplus length absorbing device according to a third embodiment.

FIG. 8 is an assembled perspective view showing a wire harness surplus length absorbing device according to a fourth embodiment.

FIG. 9 is an exploded perspective view showing a wire harness excess length absorbing device according to the fourth embodiment.

[Explanation of symbols]

1 Steering Column 2 Steering Wheel 3 Combination Switch Unit 4 Steering Shaft 10 Wire Harness 11 One End Side of Wire Harness 12 One End Side of Harness Extra Length 13 Intermediate Part of Harness Extra Length 14 Other Side 15 of Harness Extra Length 15 Wire Harness Other end side 20, 30 Wire harness surplus length absorbing device 21 Harness holding elastic plates 21a, 21b Guide recess 22 Bracket 22a Support shaft hole 23 Locking hook 23a Claw 24 Side wall 25 of casing such as steering column Pin 26 Nut 26 Lock Pin 27 Binding band 31 Harness holding elastic plates 32, 33 Locking arm

Front page continuation (51) Int.Cl. ⁷ identification code FI theme code (reference) H05K 7/00 H05K 7/00 N Q H02G 3/28 F 3/26 FF term (reference) 3J022 DA14 DA16 EA14 EA15 EA42 EB14 EC14 FA01 FA05 FB12 HA01 HB02 HB06 4E352 AA09 BB10 BB15 CC22 CC40 CC43 DD09 DD16 DR05 DR19 DR22 DR43 GG20 5G363 AA07 BA02 BB01 DA16 DC03

Claims (6)

[Claims] 1. An extra length portion is provided in the middle of the wired wire harness so that the wire harness can be expanded and contracted in the length direction by following the movement of a moving body, and the extra length portion is absorbed and accommodated. A wire harness surplus length absorbing device for, when the moving body operates and the wire harness is pulled out or pushed back, an arch shape that expands and contracts elastically in the wiring direction by the harness pulling force or harness pushing back force. A wire harness surplus length absorption comprising a harness holding elastic plate, and the harness surplus length portion held along the arch shape on the harness holding elastic plate is configured to expand and contract with regularity in the wiring direction. apparatus. 2. One of the arch-shaped end portions of the harness holding elastic plate is a fixed end and the other is a movable end.
The movable end is elastically deformed in a direction in which the movable end is expanded by the harness pulling force.
Wire harness excess length absorbing device described in. 3. The harness holding elastic plate is retained inside the elastic plate by locking an intermediate part of the extra harness length portion with a locking hook provided inside the arch-shaped top part, or the harness is attached to the arch-shaped top part. The intermediate portion of the extra length portion is held by a binding band and held inside the elastic plate.
Or the wire harness excess length absorbing device according to 2. 4. The arch-shaped top of the harness-holding elastic plate is fixed to the moving-body housing, and both ends of the arch are movable ends that are open. The wire harness surplus length absorbing device according to claim 1, wherein the wire harness extra length absorbing device is elastically deformed in a direction in which the force is relatively expanded by the force. 5. A guide recess for engaging and guiding one end side and the other end side of the harness extra length portion is provided at each of both arch-shaped end portions of the harness holding elastic plate. The wire harness excess length absorbing device according to claim 1, 2, 3, or 4. 6. The harness holding elastic plate has engaging arms provided on the outer sides of both arch-shaped ends on one end side and the other end side of the harness extra length portion, and an intermediate portion of the arch-shaped outer periphery. The wire harness surplus length absorbing device according to claim 4, wherein the device is held along the surface.