KR20120076942A - Elastic pressing member for mountain-climbing stick, connecting structure with the same and mountain-climbing stick with the connecting structure - Google Patents

Abstract

PURPOSE: A spiral elastic pressing device for an alpenstock, a connection pipe fixing structure including the same, and the alpenstock including the same are provided to prevent the generation of cracks in the joint of a connection pipe. CONSTITUTION: An alpenstock comprises a handle, first to third connection pipes, a terminal pipe, and a tip unit. The first to third connection pipes are formed in the shape of a hollow pipe and are made of carbon fiber textile sheet. An elastic pressing unit(130) comprises a body unit(131) and a division piece(132). The body unit comprises an outer incline unit and a cylindrical plane unit.

Description

Elastic pressing hole of climbing stick, connector fixing structure including the same and climbing stick having them {Elastic pressing member for mountain-climbing stick, connecting structure with the same and mountain-climbing stick with the connecting structure}

The present invention relates to a cane for climbing, and more particularly, in a cane composed of a plurality of connecting pipes formed using a carbon fiber sheet or a carbon fiber fabric sheet, the shape of the carbon fiber connecting pipe is so that it does not open or break easily. The present invention relates to an improved elastic pressing device, a connector fixing structure including the same, and a hiking stick employing the same.

Climbing canes are intended to assist hikers in walking. As the demand for hikers has recently increased, the demand for climbing canes is increasing day by day.

As shown in FIG. 1, a conventional climbing cane includes a handle and a support tube 1 connected to the handle and a connecting pipe 2, 3, and 4 connected to the bottom of the support tube in multiple stages. The multi-stage connectors are characterized in that the length can be adjusted by sliding contraction according to the user's height or need.

As a prop or a connecting pipe of the climbing stick, a hollow tube made of a light metal material such as aluminum is generally used, but a climbing stick of carbon material has recently appeared. The cane of carbon material is manufactured in the shape of a hollow tube using a carbon fiber sheet, and the carbon material has excellent strength and elasticity, but has a very light weight, so it is recently adopted to a climbing cane.

Climbing cane having a multi-stage connection tube can be adjusted as needed, the connection of the lower portion by the elastic pressure port consisting of a truncated taper member and a lower end of the truncated conical taper positioned between the adjacent adjacent tube It is common to adjust the length of the tube by shrinking or extending it into the upper connector.

2 to 6 shows a conventional cane connection structure,

In the case of Figure 2 shows the shape of a conventional general elastic pressing sphere, Figure 3 shows a cross-sectional configuration of the connector fixing structure using such an elastic pressing sphere, which discloses the utility model yarn 1992-0002248 "pigel Height adjusting device of the ski stick also serves.

Conventional elastic pressing hole 4 is to form a plurality of incisions on the lower end of the hollow cylindrical body to form a plurality of divided pieces, the elongated portion 3A in which the outer peripheral surface is formed to be inclined into the elastic pressing hole (4) By digging), the split piece is extended radially to frictionally press the inside of the connecting pipe 1 so as to adjust the coupling distance between the connecting pipes.

The principle of this elastic pressing device is applied to most other climbing sticks as it is, Figures 4 to 6 show these various modifications. Figure 4 is disclosed in Patent No. 0982703 "fixing device of a sports stick of variable length", Figure 5 is disclosed in Patent No. 0383229 "assembly device of the climbing stick", Figure 6 is a utility model registered It is disclosed in 0334041 "length control of the climbing stick."

Corresponding to the above-mentioned elastic pressing opening, there is a pressing piece 268 of FIG. 4, a locking member 400 of FIG. 5, and a pressing opening 40 of FIG. 6. In the case of the conventional elastic pressing hole, since a plurality of cutout grooves 262, 264 of FIG. 4 and 44, 46 of FIG. 6 are vertically formed vertically, the tapered members 240, 220 of FIG. When digging into the inner circumferential surface of the elastic pressing hole, the split piece expands in the radial direction of the elastic pressing hole to press the inner circumferential surface of the connecting pipe.

By the way, when the elastic pressing hole of the structure is adopted in the coupling structure of the connection pipe made of carbon fiber sheet, there is a problem that the coupling portion of the connection pipe breaks or bursts along the fiber arrangement direction of the carbon fiber.

Figure 7 is a broken state diagram of the climbing stick connection portion employing a conventional elastic pressing hole. The drawing shows an enlarged part of the connecting portion of the climbing cane 20, and shows a broken state of the connecting portion of the first connecting pipe 21 having a large diameter and the second connecting pipe 22 having a relatively small diameter. The first and second connecting tubes 21 and 22 in the figure are manufactured using the carbon fiber fabric sheet 25. In the figure it can be observed that the cracks 24 are formed long in the longitudinal direction of the second connecting pipe 22 near the connecting ring 23.

The reason why such a crack 24 occurs is because the divided pieces of the elastic pressing holes are expanded in the radial direction and spread apart by the forward movement of the inclined outer circumferential surface of the tapered member, thereby increasing the distance between the carbon fibers arranged side by side in one direction. That is, in FIG. 7, the carbon fiber extends in parallel with the lengthwise direction of the crack 24, and the phenomenon in which the carbon fibers of many strands arranged side by side by the pressing force of the divided pieces that extend outwards are caused to spread.

The carbon fiber sheet, which is the material of the connecting pipe, is a prepreg treated carbon fiber arranged in one direction, and has a very strong strength against the force acting in the longitudinal direction or the diagonal direction of the carbon fiber, but is arranged side by side. The strength is weak for the pulling force in the direction perpendicular to the longitudinal direction of the carbon fibers.

Therefore, while maintaining the excellent properties of the strut (connecting tube) made of carbon fiber sheet, it has been required to develop an elastic pressure port that does not damage the connection portion of the carbon strut.

Published Utility Model No. 1992-0002248 "Adjustment device for the height of ski sticks combined with the gel" Patent No. 0982703 "Fixing device of a sports stick with a variable length" Registered Patent No. 0383229 "Assembling device of climbing stick" Utility Model Registration No. 0334041 "Length Adjuster of Climbing Cane"

The present invention is to prevent the breakage of the connection portion of the connection of the climbing stick made of carbon fiber sheet or carbon fiber fabric sheet, an object of the present invention is to elasticity by designing the structure of the elastic pressing sphere in consideration of the fiber arrangement direction of the carbon fiber Even if the split piece of the pressure port is expanded to press the inner circumferential surface of the connecting pipe so as not to cause cracks in the connecting portion of the connecting pipe.

In order to achieve the above object, in the present invention, to extend the outer circumferential surface of the tapered member formed on the distal end of the connecting tube formed by using a carbon fiber sheet or a carbon fiber fabric sheet, the center portion is fixed up and down By forming a plurality of oblique incision in the circumferential direction spaced apart at regular intervals along the circumferential direction on the outer peripheral surface of the body portion and the opening to penetrate the plurality of divided pieces to be formed in the diagonal direction We propose an elastic pressing hole of a climbing stick.

Here, the body portion is formed in the outer inclined portion of the truncated conical shape in which the bush is formed in the inner peripheral surface is inserted into the central opening, and the inner tapered portion corresponding to the outer peripheral surface shape of the tapered member is inclined on the inner surface, the outer peripheral surface A plurality of incision grooves may be formed of a cylindrical flat portion formed in an oblique direction.

At this time, the oblique cutting groove may be formed in a zigzag alternately with the convex portion and the concave portion.

According to another aspect of the present invention, there is provided a connecting tube made of a carbon fiber sheet or a carbon fiber fabric sheet, and a tapered member formed at the distal end portion of the connecting tube, the inclined surface of which is formed on the outer circumferential surface thereof. In addition, there is also shown a connector fixing structure of the climbing cane, including an electric pressing device which is coupled to the inner circumferential surface in contact with the inclined outer circumferential surface of the tapered member.

According to another aspect of the present invention, a plurality of connectors made of carbon fiber sheets or carbon fiber fabric sheets, a handle coupled to the uppermost connector, a landing tip coupled to the lowermost connector, and a neighboring connector Climbing sticks having an electrical connector fixing structure mounted on the joints of the liver are provided.

Here, the connecting tube may have a hollow tube shape consisting of a double layer of an inner carbon fiber sheet layer and an outer fiber sheet layer.

According to the present invention, since the incision groove and the divided piece divided by the elastic pressing hole are formed to be inclined diagonally, even when each divided piece is expanded due to the coupling with the taper member, the expansion force in the diagonal direction with respect to the longitudinal direction of the carbon fiber is expanded. As a result, the gap between the carbon fibers is not widened and there is no fear of breakage.

In particular, when the carbon fiber fabric sheet is used in combination with the elastic pressing tool of the present invention as a connecting pipe, there is an effect that the strength of the connecting portion is further improved.

In addition, the elastic pressing device of the present invention has an advantage of increasing the friction force by increasing the frictional force by increasing the area in contact with the inner circumferential surface of the connecting pipe compared to the conventional elastic pressing hole having a longitudinal incision groove has an advantage of excellent connector fixing force.

1 is a schematic external view of a conventional general hiking stick.
Figure 2 is an external perspective view showing an example of a conventional elastic pressing sphere.
Figure 3 is a longitudinal sectional view of the cane connection is equipped with a conventional elastic pressing hole.
Figure 4 is an exploded perspective view of the cane fixing means according to another conventional example.
Figure 5 is an exploded perspective view of the cane fixing means according to another conventional example.
Figure 6 is a perspective view of an elastic pressing device according to another conventional example.
Figure 7 is a broken state of the climbing stick connection portion employing a conventional elastic pressing hole.
Figure 8 is an external view of a climbing stick in accordance with the present invention.
9 is an external perspective view of the elastic pressing device according to the present invention.
Figure 10 is a structural view of the connector fixing part is equipped with an elastic pressing hole of the present invention.
FIG. 11 is a conceptual diagram exemplarily illustrating a direction of a force exerted on the carbon fiber of the connecting pipe by the elastic pressing tool according to the present invention; FIG.
12 is an external perspective view of an elastic pressing device according to another embodiment of the present invention.
FIG. 13 is a cross-sectional structural view of a connector fixing member to which the elastic pressing hole of FIG. 12 is mounted; FIG.
14 to 19 is an external perspective view of the elastic pressing device according to another embodiment of the present invention.
20 is an external view of a climbing stick according to another embodiment of the present invention.
FIG. 21 is a cross sectional view along cut line XXI-XXI in FIG. 20; FIG.

Hereinafter, with reference to the accompanying drawings will be described in more detail with respect to the configuration and operation of the present invention.

Since a plurality of embodiments described below have been consistently defined with the same reference numerals by the same principle, overlapping description of the same member will be omitted and will be described based on the differences between the embodiments.

8 is an external view of a climbing stick according to the present invention, FIG. 9 is an external perspective view of the elastic pressing tool according to the present invention, and FIG. 10 is a structural view of a connector fixing part equipped with the elastic pressing tool of the present invention.

Climbing cane 100 of the present invention is the handle 101, the first to third connecting pipes (111, 112, 113) are arranged continuously in the lower end of the handle 101, the terminal tube 114 and the terminal tube (located at the bottom end) It consists of a landing tip portion 115 disposed at the bottom of the 114. In the drawings, reference numerals 116, 117, and 118 denote connecting rings mounted between the respective connecting pipes.

Each of the first to third connecting pipes 111 to 113 has a shape of a hollow tube and is formed by using a carbon fiber fabric sheet or a carbon fiber fabric sheet arranged by crossing the carbon fibers so as to cross at right angles to each other.

The carbon fiber sheets forming the connecting pipes 111 to 113 are formed by prepreg treating a plurality of carbon fibers or carbon fiber fabrics arranged side by side in one direction. That is, it is manufactured by impregnating carbon fiber in resin, such as an epoxy resin, a polyester resin, and a thermoplastic resin.

When the carbon fiber sheet or carbon fiber fabric sheet thus formed is cut-> lamination and winding process-> taping process-> heat treatment / cooling process-> decentering process-> polishing process The coffin (or props: 111-113) is completed.

Looking at the specific process of forming the carbon connection pipe (111 ~ 113) as follows.

First, a release body is applied to the entire outer circumferential surface of the round bar-shaped mandrel (not shown) to facilitate demoulding, and then an adhesive is applied thereon. The prepreg treated carbon fiber sheet cut to a predetermined length is wound on the outer peripheral surface of the mandrel and bonded. Specifically, the end of the carbon fiber sheet is bonded to the surface of the mandrel, and then the carbon fiber sheet is laminated and wound on the mandrel by a rolling device (not shown). This is called a rolling process.

The film is wound around the outermost surface of the mandrel laminate after the rolling process using a taping device (not shown). This is called a taping process, and it is preferable to use a PET film or an OPP film as the film. This taping process is carried out before molding the product after the rolling process, to discharge the remaining air between each sheet layer to the outside and to increase the degree of internal lamination of the product.

Then, the tapered mandrel and sheet laminate are molded by varying the temperature step by step for a predetermined time, and then the mandrel is demolded. At this time, the preferred molding temperature is in the range of about 80 ~ 150 ℃, heating time is about 1 ~ 4 hours is suitable.

Finally, both ends of the demolded carbon connector tubes 111 to 113 are cut to the required lengths, and after peeling off the film, the outer peripheral surface of the carbon connector tubes 111 to 113 body is polished by a centerless polishing process.

Carbon connectors manufactured through such a process (111 ~ 113) is not only light in weight, but also has the advantage of excellent strength and excellent elasticity.

In the connecting tube of the embodiment shown in Fig. 8, an example manufactured by applying a carbon fiber fabric sheet is taken as an example. The carbon fiber fabric sheet has a merit of being stronger in tensile force generated by the elastic pressing hole than the carbon fiber sheet arranged only in one direction, and thus may be more suitable for a walking stick.

As shown in FIG. 9, the elastic pressing hole 130 according to the present invention has a split portion 132 formed to be spaced apart from a plurality of body portions 131 having a central portion penetrating upward and downward and a lower end of the body portion 131. )

In the opening formed in the central portion of the body portion 131, a bush 136 having a thread 136 a is formed on an inner circumferential surface thereof.

A plurality of incision grooves 133 are formed in an oblique direction at the bottom of the body portion 131, and a plurality of incision grooves 133 are spaced apart along the circumferential direction of the elastic pressing hole 130. As the inclined groove 133 is formed to be inclined in a diagonal direction, a plurality of divided pieces 132 are also arranged in a diagonal direction with respect to each of the incision grooves 133, and each divided piece 132 is also an elastic pressing hole 130. Are arranged spirally along the circumferential direction.

As shown in FIG. 10, the elastic pressing hole 130 is mounted to contact the outer circumferential surface of the tapered member 121 fixedly attached to the upper end of the second connecting pipe 112 made of a carbon fiber fabric sheet.

A portion of the outer circumferential surface of the round bar member 122 formed at the upper end of the taper member 121 is formed with a screw thread 122a to be screwed to the thread 136a of the bush 136 mounted to the elastic pressing hole 130. In the drawing, reference numeral 123 denotes a separation preventing member mounted on an outer circumferential surface of the distal end of the round bar member 122.

The elastic pressure port 130 of the present invention is lifted while moving the screw rod 122a of the round bar member 122, when the elastic pressure port 130 is lowered by the outer peripheral surface shape of the tapered member 121 The divided pieces 132 are separated from each other.

By the way, in the case of the elastic pressing device 130 of the present invention, unlike the conventional elastic pressing device, each of the divided pieces is not only opened in the radial direction of the elastic pressing hole but also in the diagonal direction which is a direction inclined with respect to the radial direction. Therefore, a tensile force is applied in an oblique direction with respect to the longitudinal direction of the carbon fibers arranged side by side, which is the material of the first connecting pipe 111. That is, without pulling the carbon fibers arranged side by side in a direction in which they are separated from each other, the tensile force is applied obliquely in the diagonal direction of the carbon fibers arranged side by side. Therefore, it is possible to significantly reduce the adverse effect on the carbon fiber arrangement as compared to the conventional elastic pressing sphere.

This principle is the same even when the carbon fiber fabric sheet is adopted as the material of the first connecting pipe 111. However, when the material of the connecting pipe is made of a carbon fiber fabric sheet, there is an advantage in that it has a stronger strength in combination with the elastic pressing port 130 of the present invention.

11 is a conceptual diagram exemplarily expressing the direction of the force applied to the carbon fiber of the connecting tube of the elastic pressing sphere of the present invention. In the drawing, the direction of the arrow 'd-d' is the longitudinal direction of the arranged carbon fibers, and the carbon fiber strands are arranged side by side in the direction of the arrow 'a-a'. Therefore, in the case of using an elastic pressing hole formed in a straight line vertically in the vertical direction as in the prior art, the tensile force, which is a force applied to the carbon fiber, acts in the direction of the arrow 'aa', thus spreading the space between the carbon fibers and eventually the length of the carbon fiber. The crack is generated along the direction of the arrow 'dd'.

However, according to the elastic pressing device 130 of the present invention, even when the split piece 132 is opened and expanded, the tensile force acting on the carbon fiber acts in the direction of arrow 'bb' or 'cc' as shown, so that the gap between the carbon fibers This will prevent cracks from occurring.

Carbon fibers are known to have excellent strength in the longitudinal and diagonal directions of fibers due to the characteristics of the fiber arrangement. Therefore, when the elastic pressing port 130 of the present invention is applied, there is no fear that the connection pipe of the carbon fiber material is damaged.

12 is an external perspective view of an elastic pressing tool according to another embodiment of the present invention, and FIG. 13 is a cross-sectional structural view of a connector fixing part equipped with the elastic pressing tool of FIG. 12.

The elastic pressing hole 130 of the above-described embodiment has a cylindrical or truncated cone shape having a simple outer circumferential surface, but in the present embodiment, the upper portion has a truncated cone shape and a lower portion has a cylindrical shape. In addition, an inner tapered portion 141c is formed on the inner circumferential surface of the cylindrical lower structure to correspond to the outer circumferential surface shape of the truncated taper member 121. That is, the outer inclined portion 141a is formed on the upper outer circumferential surface of the elastic pressing hole 140 so as to increase in diameter from the top to the bottom, and extends from the outer inclined portion 141a so that the diameter is constant from the top to the lower outer circumferential surface. The flat portion 141b is formed.

The diameter of the inner tapered portion 141c is slightly smaller than the diameter of the tapered member 121 coupled thereto. That is, in FIG. 13, the tapered member 121 is completely inserted into the inner tapered portion 141c. At this position, the taper member 121 at the position corresponding to the diameter of the inner tapered portion 141c at the same height is shown. Means that it must be larger than the diameter. In this state, the tapered member 121 has a diameter of the divided piece 142 of the body portion 141 of the elastic pressing hole 140 is expanded to the outside and has a shape that is opened, but in the drawings for convenience of explanation Not shown based on state.

When the upper and lower portions of the elastic pressing hole 140 are formed in such a way as to form a truncated cone and a cylindrical shape, each of the divided pieces 142 is formed on the inner circumferential surface of the first connecting pipe 111 when the tapered member 121 is closely inserted. The contact area is increased, and the fixing force is improved. That is, when the taper member 121 is inserted into the inner tapered portion 141c of the elastic pressing hole 140 and the split piece 142 is spread outward, the entire outer surface of the flat portion 141b of the elastic pressing hole 140 is opened. Is able to contact the inner circumferential surface of the first connecting pipe 111 is to increase the contact friction force compared to the prior art.

The rest of the configuration of the present embodiment is the same as in the above-described embodiment, in the case of the present embodiment, a plurality of diagonal cut grooves 143 and the divided pieces 142 are formed on the outer surface of the lower cylindrical flat portion 141b. The same is true.

14 to 19 is an external perspective view of the elastic pressing device according to another embodiment of the present invention. In the above-described embodiment, the plurality of cutout grooves 133 and 143 formed in the diagonal direction form a straight line, but in the present embodiment, each of the cutout grooves 153 to 203 is a convex portion 153a to 203a and a concave portion ( 153b to 203b are alternately arranged in a zigzag pattern.

14 and 17, the convex portions 153a and 183a and the concave portions 153b and 183b are rectangular in shape. In the case of Figs. 15 and 18, the convex portions 163a and 193a and the concave portions. 16 and 19, the convex portions 173a and 203a and the concave portions 173b and 203b are formed in the shape of a floor and a valley.

All of the modified examples 150 to 200 of the elastic pressing holes having the cut grooves 153 to 203 having various structures are also structures in which tensile force is applied in an oblique direction with respect to the longitudinal direction of the carbon fiber to prevent cracking of the carbon fiber. .

In the case of the elastic pressing holes 130 to 200 of the present invention, an area in contact with the inner circumferential surface of the connecting pipe is increased as compared with the conventional elastic pressing hole having a vertical incision groove, thereby increasing the frictional force, thereby providing an excellent connector fixing force.

20 is an external view of a climbing stick according to another embodiment of the present invention, and FIG. 21 is a cross-sectional view taken along a cutting line XXI-XXI of FIG. 20.

In the present embodiment, the first to third connecting pipes 111 to 113 are not formed of a single layer of carbon fiber sheets but are composed of two layers. That is, the fiber sheet layer 112b is formed on the carbon fiber sheet layer 112a made of carbon fibers or carbon fiber fabrics arranged in one direction.

The fibrous sheet layer 112b is also prepreg treated as natural or synthetic fibers, such as camouflage patterns such as leaves and wood grain patterns, or trademarks, logos, character designs, or the like.

As such, when the carbon fiber sheet layer 112a, which is an elastic sheet, and the fiber sheet layer 112b, which is an inelastic sheet layer, are formed in combination, not only the appearance of the connecting pipes 111 to 113 is beautiful but also the connecting pipes 111 to 113. There is an effect that the strength of the reinforcement. In particular, the decorative sheet is attached to the outer circumferential surface of the first to third connecting pipes (111 to 113) to decorate the appearance, the decorative pattern is well worn or peeled off as compared to the fiber sheet on the carbon fiber sheet layer 112a as in the present invention In the case where the layers 112b are overlapped with each other, the pattern may not be peeled off well and the process of attaching the transfer paper or the sticker may be omitted.

The method of forming the fiber sheet layer 112b on the carbon fiber sheet layer 112a may include forming a fiber on the carbon fiber sheet layer wound on the mandrel during the lamination and winding process in the manufacturing process of the connecting pipes 111 to 113 described above. After further winding the sheet, the subsequent steps may be performed in the same manner as described above.

The present invention relates to an elastic pressing hole mounted on the connection portion of the connection pipe of the cane made of carbon fiber sheet or carbon fiber fabric sheet, and the connection portion of the connection pipe made of carbon fiber sheet is broken by the expansion force of the split piece. It is to prevent becoming. Therefore, if the present invention is adopted in the connection structure, it will be able to widely spread the climbing stick made of carbon fiber material exhibiting excellent performance in terms of strength, weight and elastic force.

100: hiking stick 101: handle
111 to 113: first to third connecting pipes 114: terminal pipe
115: landing tip portion 116 to 118: first to third connection ring
112a: carbon fiber sheet 112b: fiber sheet
121: taper member 122: round bar member
122a: thread 123: release preventing member
130 to 200: elastic pressing holes 131 to 201: body portion
132-202: Split piece 133-203: Incision groove
153a-203a: convex portions 153b-203b: concave portions

Claims (6)

Body portion which is extended on the outer circumferential surface of the tapered member formed on the distal end of the lower connecting pipe formed by using a carbon fiber sheet or a carbon fiber fabric sheet to pressurize and fix the inner circumferential surface of the upper connecting pipe, and has a central portion penetrating upward and downward. And elastically pressing the climbing stick, characterized in that a plurality of divided pieces bounding each cutting groove are formed in an oblique direction by forming a plurality of diagonal cut grooves at regular intervals along the circumferential direction on the outer circumferential surface of the body portion. phrase. The method of claim 1,
The body portion has a truncated outer inclined portion having a truncated conical shape in which a bush having a thread formed on the inner circumferential surface is inserted into a central opening, and an inner tapered portion corresponding to the outer circumferential surface shape of the tapered member is inclined on the inner surface, and a plurality of outer circumferential surfaces are inclined. Elastic pressing hole of the climbing stick, characterized in that the incision groove is made of a cylindrical flat portion formed in an oblique direction. The method according to claim 1 or 2,
The oblique incision groove is an elastic pressing hole of the climbing stick, characterized in that the convex portion and the concave portion are alternately formed zigzag. A connecting tube made of a carbon fiber sheet or a carbon fiber fabric sheet, a tapered member formed on the distal end of the connecting tube, the tapered member having an inclined surface of a lower light cooperating side formed on an outer peripheral surface thereof, and an inclined outer peripheral surface of the tapered member A connector fixing structure for a climbing stick, comprising the elastic pressing tool of claim 1 or 2 coupled to the inner circumferential surface in contact therewith. 4. A plurality of connectors made of carbon fiber sheets or carbon fiber fabric sheets, a handle for engaging the uppermost connector, a landing tip for engaging the lowermost connector, and a coupling between the adjacent connectors Climbing cane with connector fixing structure. The method of claim 5,
The connecting tube is a climbing stick, characterized in that the hollow tube consisting of a double layer of the inner carbon fiber sheet layer and the outer fiber sheet layer.

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