JP2007215279A - Harness protection tube and power feeding structure using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a harness protection tube suitable for a wiring harness for conducting constant power feeding to a slide door from, for example, a vehicle body. <P>SOLUTION: The harness protection tube 1 is composed by alternately disposing a circumferential recessed groove 2 and a protrusion 3 in a tube longitudinal direction, and the recessed groove 2 and the protrusion 3 are formed into rectangular ring shapes at their cross sections. The recess groove 2 and the protrusion 3 are also formed into square ring shapes at their cross sections. Four corners 7 of the recessed groove 2 and the protrusion 3 are formed into curved shapes at their cross sections. The harness protection tube 1 is disposed toward a slide structural body 41 from a fixed structural body 47, and made to feed power to the slide structural body. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a harness protection tube that is configured in a bellows shape and is flexible, and a power feeding structure using the same.

  FIG. 9 shows one form of a conventional harness protection tube (see, for example, Patent Document 1).

  This harness protection tube 9 is a corrugated tube having a circular cross section in which concave grooves 21 and ridges 22 having a circular cross section in the circumferential direction are alternately arranged in a bellows shape in the tube longitudinal direction using a synthetic resin as a material. Good flexibility in any direction.

  FIG. 10 shows another form of a conventional harness protection tube (see also Patent Document 1).

  This harness protection tube 10 has a cross-sectional oval shape (flat shape) in which concave grooves 23 and ridges 24 having a circular cross-section shape (flat shape) in the circumferential direction using a synthetic resin as a material are alternately arranged in a bellows shape in the tube longitudinal direction. ) Corrugated tube that exhibits good flexibility in the minor axis direction and rigidity in the elongated direction.

  FIG. 11 shows an embodiment of a power feeding structure using a conventional harness protection tube (see, for example, Patent Document 2).

  This power supply structure is to constantly supply power from the vehicle body 47 side of the automobile to each auxiliary machine of the slide door 41. As the harness protection tube, the corrugated tube 9 having a circular cross section in FIG. 9 or the oblong cross section in FIG. Corrugated tube 10 is used. In this example, the corrugated tube 9 will be described.

  A plurality of insulation-coated electric wires 52 are inserted into the inner space of the corrugated tube 9 to form a wire harness 43 ′, and the wire harness 43 ′ is made of a synthetic resin protector 42 (the protector cover is not shown in the figure). And is biased upward by the leaf spring 44, so that the extra length (slack) of the wire harness 43 'when the door is half-opened due to opening and closing of the slide door 41 is absorbed. ing. The wire harness 43 ′ is routed from the protector 42 to the vehicle body 47 side through the crossing space, and is supported by the harness fixture 53 ′ on the vehicle body side.

  FIG. 12 shows the open / closed state of the slide door 41 (the solid line is fully open and the chain line is fully closed). The slide door 41 slides rearward of the vehicle body 47 while being spaced apart from the vehicle body 47 and is fully opened. The opposite is true when fully closed. The wire harness 43 'swings back and forth while being led out from the protector 42 with the harness fixture 53' on the vehicle body side as a fulcrum. The harness fixture 53 supports the corrugated tube 9 so as to be rotatable in the circumferential direction.

  FIG. 13 shows another form of a power feeding structure using a conventional harness protection tube for constantly feeding power to an automobile sliding door (see, for example, Patent Document 3).

  As the harness protection tube, a flexible mesh tube 36 having a relatively small diameter and good flexibility is connected to the corrugated tubes 9 and 10 of FIG. In this example, the corrugated tube 10 will be described. A plurality of electric wires are inserted into each of the protective tubes 10 and 36 to form a wire harness 35. The wire harness 35 is bent in a loop shape in a protector 61 made of synthetic resin (only the protector base is shown). One of the portions 34 is led out from the lower opening 63 of the protector 61 to the vehicle body side, and the other of the loop portions 34 is routed from the back side of the protector 61 into the slide door.

The loop portion 34 of this example is supported by two rollers 66 and 67 so as to be able to expand and contract, and the extra length of the wire harness 35 is absorbed while the loop portion 34 expands and contracts as the slide door opens and closes. FIG. 13 shows a state when the sliding door is fully opened. The state when the sliding door is opened and closed, the state where the wire harness 35 is led out from the protector 61, and the basic structure of the harness fixture 53 "are the same as those shown in FIG.
Japanese Patent Laid-Open No. 2002-233026 (FIGS. 1 and 6) JP 2001-354085 A (FIGS. 4 and 7) Japanese Patent Laying-Open No. 2005-137082 (FIGS. 1 to 3)

  However, the conventional corrugated tube 9 having a circular cross section in FIG. 9 is bent in all directions (in any direction). For example, when used in the power feeding structure in FIG. 11, the sliding door in FIG. The wire harness 43 ′ including the corrugated tube 9 tends to swing along a linear trajectory with the shortest distance when the terminal 41 is fully opened. Depending on the position of the harness fixture 53 ′ or the like, the corrugated tube 9 may be There was concern that it could interfere with 47.

  Further, since the corrugated tube 10 having an oval cross section (flat shape) in FIG. 10 can be bent only in the minor axis direction, the trajectory at the time of movement can be restricted, but hardly bent in the major axis direction. In addition, since the long diameter is long, there is a concern that the bending rigidity is high and the opening / closing operation force of the sliding door is increased. In order to avoid this, when the corrugated tube 10 is used by being divided into two at the longitudinal intermediate portion and connected, there is a concern that it takes man-hours and costs, and when the thickness of the corrugated tube 10 is reduced. There was a concern that the durability would be lowered.

  Further, when the corrugated tube 10 having an oval cross section (flat shape) is used as the loop portion 34 of the power feeding structure in FIG. 13, a large stress is applied at the time of bending because the loop portion 34 is particularly circular. In addition, since the corrugated tube 10 has a long major axis, a large force is required to bend in the minor axis direction, the sliding door opening / closing operation force increases, and the protector 61 is in the thickness direction (the major axis direction of the corrugated tube 10). There was concern that it would become bloated.

  In view of the above points, the present invention uses a harness protection tube having a shape that can solve the disadvantages of the corrugated tube having a circular cross section and the corrugated tube having an elliptical cross section (flat shape) and exhibit the advantages of both. An object is to provide a feeding structure.

  In order to achieve the above object, a harness protection tube according to claim 1 of the present invention is a harness protection tube in which circumferential grooves and ridges are alternately arranged in the tube longitudinal direction. The ridges are formed in a rectangular cross section.

  With the above-described configuration, the harness protection tube can be bent in four directions orthogonal to the four sides of the concave grooves and ridges having a rectangular cross section. Diagonal bending in the square portion of the concave groove and the ridge having a rectangular cross section is suppressed. The cross-sectional rectangular shape includes a cross-sectional square and a cross-sectional rectangle, and is preferably a cross-sectional square or a rectangle close thereto. The bending rigidity of the harness protection tube increases in the order of circular cross section, rectangular cross section, and oval cross section (flat shape). For example, when a wire harness is routed from a vehicle body to a slide door using a harness protection tube having a rectangular cross section, the harness protection tube having a rectangular cross section is maintained in a properly bent state when the slide door is fully opened. The interference with the vehicle body is prevented, and the harness protection tube having a rectangular cross section can be bent in all directions when the door is opened and closed, so that the door opening and closing operation force is reduced. In addition, when a harness protection tube having a rectangular cross section is bent in a loop shape for a power supply device for a sliding door, the space saving is required compared to a protection tube having a circular cross section, and bending is performed more than a protection tube having an elliptical cross section. Stress is reduced.

  The harness protection tube according to claim 2 is characterized in that, in the harness protection tube according to claim 1, the concave grooves and the ridges are formed in a square cross section.

  With the above configuration, the harness protection tube is bent in all directions uniformly with the same force. Thereby, the effect of the invention of claim 1 is more remarkably exhibited.

  A harness protection tube according to a third aspect is the harness protection tube according to the first or second aspect, wherein the square portions of the concave grooves and the ridges are formed in a curved cross section.

  With the above configuration, the flexibility of the harness protection tube in all directions is improved, and the bending can be performed more smoothly with a smaller force. Moreover, the die-cutting property at the time of forming the synthetic resin harness protection tube by extrusion molding is improved.

  The power supply structure using the harness protection tube according to claim 4 is configured to route the harness protection tube according to any one of claims 1 to 3 from the fixed structure to the slide structure and to supply power to the slide structure. It is characterized by making it.

  With the above configuration, a wire harness including a harness protection tube is routed from a fixed structure such as a vehicle to a slide structure such as a slide door or a slide seat of the vehicle, and power is always supplied. Since the harness protection tube having a rectangular cross section is maintained in a properly bent state when the slide structure is fully opened, interference with the fixed structure is prevented, and the harness protection tube having a rectangular cross section when the slide structure is opened and closed Since it can be bent in all directions, the opening / closing operation force of the slide structure is reduced. In addition, when a harness protective tube having a rectangular cross section is bent in a loop shape and used in a power supply device of a slide structure, it requires less space than a protective tube having a circular cross section, and more than a protective tube having an elliptical cross section. Bending stress is reduced.

  According to the first aspect of the present invention, the harness protection tube having a rectangular cross section exhibits an intermediate action between the harness protection tube having a circular cross section and the harness protection tube having an elliptical cross section. When applied, the harness protection tube with a rectangular cross section can be bent with moderate rigidity while preventing interference with the vehicle body, and it can be bent in all directions compared to a harness protection tube with an oval cross section. The operability of the sliding door is improved, and when the extra length is absorbed by bending in a loop shape within the sliding door, the harness protection tube having a rectangular cross section takes less space than the protective tube having a circular cross section, and Since it exhibits smooth bending and good durability without stress concentration than a protective tube with an oval cross section, Reliability of the hourly electricity is improved.

  According to the invention described in claim 2, since the harness protection tube having a square cross section is uniformly bent in the four directions with the same force, the effect of the invention described in claim 1 is more remarkably exhibited.

  According to the invention described in claim 3, the harness protection tube having a rectangular cross section (square shape) can be smoothly bent with a smaller force, and the effects of the inventions described in claims 1 and 2 are more remarkably exhibited. The

  According to the invention of claim 4, the harness protection tube having a rectangular cross section from the slide structure to the fixed structure is bent with an appropriate rigidity while preventing interference with the fixed structure, and the harness having an oval cross section. Compared to the protective tube, it can be bent in all directions, improving the operability of the slide structure, and protecting the harness with a rectangular cross section when the slide structure is bent into a loop to absorb the excess length Since the tube takes up less space than a protective tube with a circular cross section, and exerts a smooth bend and good durability without stress concentration than a protective tube with an elliptical cross section, it can be applied to the slide structure. The reliability of constant power supply is improved.

  1 to 3 show an embodiment of a harness protection tube according to the present invention.

  This harness protection tube 1 is made of synthetic resin as a material, and has a groove (valley part) 2 and a ridge (crest part) 3 having a rectangular cross section (square ring) in the circumferential direction alternately in the longitudinal direction of the tube. It is a corrugated tube having a rectangular cross section (square shape) formed by arranging a plurality.

  The ridge 3 continues to the groove 2 integrally. Each ridge 3 has a four-sided top wall (annular wall) 5 of equal length, two opposite-side top walls 5 are positioned in parallel, and each concave groove 2 has a four-sided bottom wall 4 of equal length. The bottom walls 4 on the two opposite sides are positioned in parallel. The corrugated tube 1 can be bent in directions (four directions) perpendicular to the four sides.

  As shown in FIG. 2, the square part of the corrugated tube 1, that is, the square part 6 of each concave groove 2 and the square part 7 of each ridge 3 are curved in a cross-section arc shape (¼ circle shape, ie 90 ° arc). In addition, since there are no sharp corners, the flexibility is enhanced and the die-cutting property at the time of extrusion molding is enhanced. It goes without saying that the radius of the curved portion of the ridge 3 (substitute with reference numeral 7) is larger than the radius of the curved portion of the concave groove 2 (substitute with reference numeral 6).

  As shown in FIG. 3 (cross-sectional view), the side walls 8 located on both sides of the top wall 5 of the ridge 3 are slightly tapered, which also improves the flexibility and the die-cutting property at the time of extrusion molding. Has been increased.

  The corrugated tube 1 having a rectangular cross section (square shape) can be easily formed by extrusion, like a corrugated tube having a circular cross section or an oval cross section. For example, immediately after a primary tube (not shown) having a flat cross-sectional surface with a rectangular cross section is pushed out from a straight die (not shown), the circumferential concave groove 2 is formed with inner and outer corrugated molds (not shown). And ridges 3 are formed.

  As shown in FIG. 3, the annular bottom wall 4 of the groove 2 is formed in a substantially semicircular cross section, and exhibits good flexibility as well as good mold release properties. The inner surfaces of the groove 2 and the protrusion 3 of the corrugated tube 1 have the same shape as the outer surface (a shape along the outer surface).

  Since the corrugated tube 1 has a square cross section (also referred to as a square shape including the square curved portion 7), the corrugated tube 1 can be bent in the thickness direction of the four side wall portions 4 and 5 (in the four directions) and is opposed to the corrugated tube 1. Bending in the direction (diagonal direction) in the corner 7 (intersection of adjacent wall portions) is suppressed.

  The corrugated tube having a circular cross section can be bent in all directions (in any radial direction), and the corrugated tube having an elliptical cross section can be bent only in the short diameter direction. It can be bent in four directions at 90 ° intervals.

  Further, in terms of easy bending (weak rigidity), the corrugated tube having a circular cross section is most easily bent (low rigidity), and then the corrugated tube 1 having a square cross section is easily bent, and then the corrugated tube having an elliptical cross section. It becomes the order of. The corrugated tube 1 having a square cross section has an intermediate bending rigidity between a circular cross section and an oval cross section. Thus, the corrugated tube 1 having a square cross section exhibits an intermediate action between the circular cross section and the oval cross section.

  The bending direction of the corrugated tube 1 having a square cross section is regulated in four directions, and the bending rigidity is higher than that of the corrugated tube having a circular cross section, so that the wire harness 43 is the outermost end in a power supply structure (FIGS. 5 to 6) described later. It is no longer necessary to take a linear trajectory of the distance, and the concern about interference with the vehicle body 47 in the corrugated tube having a circular cross section is eliminated.

  In addition, since the corrugated tube 1 having a square cross section can be bent in all directions and the bending rigidity is lower than that of the corrugated tube having an oval cross section, the loop of the corrugated tube 1 in the power feeding structure (FIGS. 7 to 8) described later. The bendability of the portion 60 is improved, the bending stress is reduced and the durability is improved, and the opening / closing operation force of the slide door is reduced and the operability is improved. Furthermore, since the length of one side of the corrugated tube 1 having a square cross section can be made shorter than the major axis of the corrugated tube having an oval cross section, the protector 61, that is, the power feeding device is made compact in the thickness direction.

4A, 4B, and 4C, the corrugated tube 9 having a circular cross section, the corrugated tube 1 having a square cross section, and the corrugated tube 10 having an oval cross section are compared with the same cross sectional area (about 205 mm ² ). Is.

When the diameter D of the corrugated tube 9 having a circular cross section in FIG. 4A is 16 mm, the length L of one side of the corrugated tube 1 having a square cross section in FIG. 4B is 14.3 mm, FIG. The length L ₁ of the flat portion on the long diameter side of the corrugated tube 10 having an oval cross section is 12.7 mm, and the short diameter L ₂ is 10.0 mm.

  As described above, the corrugated tube 1 having a square cross section can be accommodated more compactly than the corrugated tubes 9 and 10 having a circular cross section or an oval cross section. Further, the wire insertion work is easier than the corrugated tube 10 having an oval cross section, and the degree of freedom of the wire 52 (FIG. 5) is high, so that the accommodation rate of the wire 52 is also increased.

  5 to 6 show an embodiment in which the corrugated tube 1 having a square section is applied to a power feeding structure (power feeding device 40) similar to the conventional FIG.

  FIG. 5 shows a fully closed state of the sliding door 41 of the automobile, and FIG. 6 shows a half-opened state immediately before the sliding door 41 is fully opened. The corrugated tube 1 is routed from the front end portion 51 of the protector 42 on the slide door side to a harness fixture (harness fixing portion) 53 in the vicinity of the step portion 48 of the vehicle body 47, and is bent in the protector 42 with a leaf spring ( The elastic member 44 is biased upward.

  A plurality of electric wires 52 are inserted through the corrugated tube 1 to form a wire harness 43. One of the electric wires 52 is connected to an auxiliary machine or the like on the sliding door side, and the other electric wire 52 is connected from the harness fixture 53 to the vehicle body side. Is connected to a wire harness (not shown) on the power source side. The harness fixture 53 includes an inner clamp (not shown) that holds the corrugated tube 1 having a square cross section, and an outer that holds the inner clamp so that the wire harness 43 (corrugated tube 1) can be twisted in the circumferential direction. It is preferable to be composed of a clamp (represented by reference numeral 53).

  When the door of FIG. 5 is fully closed, the corrugated tube 1 having a square cross section extends from the harness fixture 53 almost horizontally to the elongated lower opening 45 of the protector 42 and bends upward on the lower opening 45 (the bent portion is It is curved upward along the outer peripheral wall 50 of the protector 42 (indicated by reference numeral 39) and is fixed by a harness fixing portion 54 on the lower front end side of the protector 42.

  When the sliding door 41 in FIG. 6 is opened, the corrugated tube 1 having a square cross section extends from the harness fixture 53 toward the cross space 46 almost horizontally and is pulled forward with the harness fixture 53 as a fulcrum. 46 or its vicinity is bent backward (the bent portion is indicated by reference numeral 38), and is bent into a small radius against the bias of the leaf spring 44 while being introduced into the protector from the lower opening 45 of the protector 42, and is bent to the front end. It continues to the harness fixing part 54 on the side. The same applies when the slide door 41 is fully opened.

  When the sliding door 41 is fully opened, the corrugated tube 1 having a square cross section has higher rigidity than the corrugated tube 9 having a circular cross section, and has a certain amount (appropriate) in four directions (directions orthogonal to the four wall portions 5). Since it has difficulty in bending, it does not draw a linear trajectory of the endmost distance like the corrugated tube 9 having a circular cross section in the crossing space 46, and is bent backward with a relatively large radius (the bent portion is Interference between the corrugated tube 1 and the vehicle body 47 is reliably prevented, and the concern about damage to the corrugated tube 1 is eliminated.

5 and 6, when the sliding door 41 is opened and closed, the corrugated tube 1 having a square cross section from the protector 42 to the harness fixture 53 is compared with the case where the corrugated tube 1 having an oval cross section is used. Since it bends and swings with a force smaller than that of the corrugated tube 10, the opening and closing operation of the slide door 41 is performed smoothly with a small force. This is because the length L of one side L of the corrugated tube 1 having a square cross section is shorter than the major axis dimension L ₃ (FIG. 4) of the corrugated tube 10 having an oval cross section, and the corrugated tube 10 having an oval cross section is in the minor axis direction. This is due to the fact that a large amount of force is required when trying to bend.

  7 to 8 show an embodiment in which the corrugated tube 1 having a square cross section is applied to a power feeding structure (power feeding device 59) similar to the conventional FIG.

  FIG. 7 shows a fully closed state of a sliding door (not shown) of the automobile, and FIG. 8 shows a fully opened state of the sliding door. The corrugated tube 1 having a square cross section is introduced into the protector through the vertical substrate portion 62 from the upper end side of the protector 61 on the slide door side, and is bent into a loop shape in the protector (the loop portion is denoted by reference numeral 60). As shown in the drawing, the cable is routed from the elongated lower opening 63 to the harness fixture (harness fixing portion) 53 on the vehicle body side.

  When the sliding door of FIG. 7 is fully closed, the corrugated tube 1 having a square cross section is pulled upward along the outer peripheral inclined wall 64 from the rear end of the protector 61 while being pulled substantially horizontally with the harness fixture 53 as a fulcrum. It is led out from the hole 65 of the substrate portion 62 toward the slide door while being inclined and bent in a small-diameter loop shape in the protector.

  When the sliding door is half open, the loop portion 60 is greatly expanded in diameter to absorb the surplus length. The loop portion 60 is preferably supported and expanded in diameter by a fixed roller 66 and a movable roller 67 biased by a spring (an elastic member not shown).

  When the sliding door shown in FIG. 8 is fully opened, the corrugated tube 1 extends in an inclined manner while being pulled rearward from the harness fixture 53, and is bent upward in the protector 61 (the bent portion is indicated by reference numeral 37) in a clockwise direction. It is led out to the slide door side while bending and intersecting in a loop shape with a radius.

  In this example as well as the previous example, when the sliding door is fully opened, the corrugated tube 1 having a square cross section in the transition space (reference numeral 46 in FIG. 6) draws a curved path instead of a straight line at the extreme end distance. Of course, the corrugated tube 1 having a square cross section in the protector 61 is flexibly bent into a loop shape in the protector 61, so that the stress applied to the corrugated tube 1 is reduced and the protector 61 has a cross sectional length. Space is saved in the thickness direction as compared with the case of the circular corrugated tube 10. Since the corrugated tube 10 having an oval cross section has almost no flexibility in the major axis direction, the flexibility decreases when it is bent in a loop shape and intersecting the minor axis direction. This problem does not occur because it can be bent in all directions.

  Further, when the sliding door is opened and closed, the corrugated tube 1 having a square cross section from the protector 61 to the harness fixture 53 has a smaller force than a corrugated tube having an oblong cross section (especially, a large force is required when bending in the major axis direction). Since it bends and swings, the sliding door can be opened and closed smoothly with a small force. Since the operation force is small, there is no need to divide and connect like the corrugated tube 10 having an oval cross section, and the corrugated tube 1 can be integrated, so that the tube part number is reduced and the wiring harness 43 is routed. Man-hours and costs are reduced. The same applies to the embodiments of FIGS.

  In addition, in each said embodiment, although the cross-sectional square corrugated tube 1 was used, the cross-sectional rectangle close | similar to a cross-sectional square and the difference of the length of the wall part of each two sides (long side and short side) which oppose If it is a corrugated tube (not shown) having a rectangular cross section that is not so large, the same effects as described above can be achieved. The cross-sectional rectangular shape including the square cross-sectional shape and the rectangular cross-sectional shape is referred to.

  Further, in each of the above embodiments, the power feeding structure of the slide door of the automobile is shown, but the cross section is not limited to the automobile but also in the slide door of other vehicles, machine tools, etc., the slide seat of the vehicle other than the slide door, etc. A power feeding structure (power feeding device) can be configured using a rectangular corrugated tube. These slide doors, slide seats, and the like are collectively referred to as a slide structure, and the vehicle body, the machine tool body, and the like are collectively referred to as a fixed structure.

  It is also effective to apply the corrugated tube 1 having a rectangular cross section to a wiring structure of a wire harness in place of the power feeding structure. As the harness routing structure, in addition to the harness routing structure in the power feeding structure, for example, a structure in which the wire harness is routed in a two-dimensional or three-dimensional shape along the vehicle body or the like can be cited.

  The wire harness 43 itself configured by inserting an electric wire through the corrugated tube 1 having a rectangular cross section is also effective as an invention. The wire harness 43 is used for constantly supplying power to the slide structure and for wiring to a fixed structure such as a vehicle body.

It is a perspective view showing one embodiment of a harness protection tube concerning the present invention. It is a top view which similarly shows a harness protection tube. It is sectional drawing which similarly shows a harness protection tube. (A) is a harness protection tube with a circular cross section, (b) is a harness protection tube with a square cross section, and (c) is a comparative explanatory view showing a harness protection tube with an oblong cross section. It is a perspective view at the time of a sliding door fully closed which shows one Embodiment of the electric power feeding structure using the harness protection tube which concerns on this invention. It is a perspective view at the time of a sliding door half open similarly. It is a perspective view at the time of a fully closed sliding door which shows other embodiment of the electric power feeding structure using a harness protection tube. Similarly, it is a perspective view when the sliding door is fully opened. It is a perspective view which shows one form of the conventional harness protection tube. It is a perspective view which shows the other form of the conventional harness protection tube. It is a perspective view which shows one form of the electric power feeding structure using the conventional harness protection tube. It is explanatory drawing (plan view) which shows the state at the time of opening and closing of the sliding door in a power feeding structure. It is a perspective view which shows the other form of the electric power feeding structure using the conventional harness protection tube.

Explanation of symbols

1 Corrugated tube (harness protection tube)
2 Groove 3 Projection 7 Square part 47 Vehicle body (fixed structure)
41 Sliding door (sliding structure)

Claims (4)

  A harness protection tube formed by alternately arranging circumferential grooves and ridges in the tube longitudinal direction, wherein the groove and the ridges are formed in an annular cross section.   The harness protection tube according to claim 1, wherein the concave groove and the ridge are formed in an annular cross section.   The harness protection tube according to claim 1 or 2, wherein a square portion of the concave groove and the ridge is formed in a curved cross section.   A power supply structure using a harness protection tube, wherein the harness protection tube according to any one of claims 1 to 3 is routed from a fixed structure to a slide structure to supply power to the slide structure.

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