JP5274995B2 - Folding cane pipe connection structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To convert a walking stick into a folding state or an extending state with a comparatively simple operation, and also to reduce the number of components and man-hour in assembling since the stick has a comparatively simple structure. <P>SOLUTION: The foldable walking stick includes: a plurality of pipes 11, 12; and a plurality of connection members 16 for serially connecting the plurality of pipes, where the plurality of pipes are changed into the folding state or the extending state with the use of the connection members. A projection 19 is arranged by projection from the end part of one pipe 11, and a recessed part 23c to store the projection is formed in a recession 23 arranged in the end part of the other pipe 12. A first shaft 21 penetrating the projection is connected to a second shaft 22 penetrating the recession with the use of a connection shaft 24. The first shaft, the connection shaft, the second shaft, which are linearly stretched, are urged in a drawing direction into the one or the other pipe by a spring 26 stored inside the one or the other pipe, and also the projection is urged in a storage direction into the recessed part. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a structure for connecting a plurality of pipes of a folding stick.

  Conventionally, as a pipe connection structure of this type of foldable cane, of the two pipe struts to be connected, a central frustoconical shape is formed in the shape of a truncated cone so that it protrudes from the pipe end to the side end of one pipe strut. For folding sticks, etc., in which a convex connection fitting with a central hole is fixed, and a concave connection fitting with a tapered surface that fits the convex connection fitting on the side end of the other pipe support is fixed in the pipe support. A pipe connection structure to be used is disclosed (for example, refer to Patent Document 1). In this pipe connection structure, the tip end of the tapered surface of the concave coupling fitting is opened, and an iron sleeve having the same inner diameter as the central hole of the convex coupling fitting is inserted into this opening, and the side end side of the pipe post of the iron sleeve is inserted. A spring receiver in which a step is provided between the tapered surface of the concave coupling fitting so that the upper end of the stopper fitting hooks the leading edge of the stopper fitting, and a through hole is formed at the tip and center of the concave coupling fitting in the pipe column. A coil spring is housed between the two, and the spring receiver is configured to slide in the pipe column in response to deformation of the coil spring. In addition, a stopper metal fitting that is formed in an L-shape consisting of a vertical axis and a horizontal axis and whose key part at the tip of the vertical axis is large enough to be able to insert a steel sleeve is positioned so that the key part is on the iron sleeve side in the coil spring. In the state in which the hook portion at the tip of the vertical axis is hooked on the iron sleeve, the tip of the convex connection fitting is formed between the hook portion and the tapered surface of the concave connection fitting.

  A hole is formed in the tip of the vertical axis and the horizontal axis of the stopper bracket, one wire is connected to the hole at the vertical axis tip, the other wire is connected to the hole at the horizontal axis tip, and the hole is connected to the hole at the vertical axis tip. Insert one wire into the center hole of the convex connection fitting, connect the end of one wire to the retaining ring so that it does not come out of the center hole of the convex connection fitting, and connect the other end to the hole at the tip of the horizontal axis This wire is passed through the coil spring and inserted into the through hole at the center of the spring receiver, and the end of the other wire is connected to the retaining ring so that it does not come out of the spring receiver. In addition, the coil spring contracts and the tip hook part of the stopper metal fitting is hung on the upper end of the iron sleeve, and one wire has a length that allows the pipe strut and the pipe strut to be bent so that both pipe struts are parallel. When the other wire is contracted by the coil spring, the leading end portion of the stopper metal fitting has a length that hangs on the upper end of the iron sleeve. In addition, when the convex support fitting of the pipe post is inserted into the concave connection fitting of the pipe post and the pipe post and the pipe post are connected, the entire stopper fitting is located in the coil spring and the coil spring does not extend completely. The length of one wire and the other wire is set so as to be in a state.

In the pipe connection structure configured in this way, when the walking stick is folded, the pipe struts do not attract each other, so there is no damage, and the folded state is maintained even when the hand is released. Easy to handle. As a result, when used as a walking stick, it is possible to produce a folding stick with a material that is easily scratched, such as a carbon pipe or a lacquered finish. Furthermore, when carrying the portable phone in a folded state, the L-shaped stopper fitting does not come off even if it is dropped or bumped to give an impact to the stick.
Japanese Patent No. 3876418 (Claim 1, paragraph [0017], paragraph [0018], FIGS. 3 and 4)

  However, the conventional pipe connection structure disclosed in Patent Document 1 requires a relatively large number of parts, which complicates parts management and increases the number of assembly steps. Further, in the pipe connection structure disclosed in the above-mentioned conventional patent document 1, when an impact is applied to the stick in a folded state, depending on the direction in which the impact acts, the L-shaped stopper fitting is removed and the coil spring is removed. There is a possibility that the convex connecting metal fitting may be pulled into the pipe column through one of the wires.

  An object of the present invention is to provide a pipe connection structure of a folding stick that can convert the walking stick into a folded state or an extended state with a relatively simple operation and can reduce the number of parts and assembly man-hours because of its relatively simple structure. It is to provide. Another object of the present invention is to provide a pipe connection structure for a folding stick that prevents the connection shaft from being unintentionally pulled into one pipe even if the stick is impacted in a folded state. There is to do.

As shown in FIGS. 1 and 7, the invention according to claim 1 includes a plurality of pipes 11 and 12 and a plurality of connecting members 16 that connect the plurality of pipes 11 and 12 in series. This is an improvement of the folding type stick in which the plurality of pipes 11 and 12 can be changed to the folded state or the extended state. The characteristic configuration is that the connecting member 16 has a convex portion 19 projecting from the end portion of one pipe 11 and a concave portion 23c provided in the end portion of the other pipe 12 and capable of accommodating the convex portion 19. The formed concave portion 23, the first shaft 21 that penetrates the convex portion 19, the second shaft 22 that penetrates the concave portion 23, and the connecting shaft 24 that connects the first shaft 21 and the second shaft 22. The first shaft 21, the connecting shaft 24 and the second shaft 22 accommodated in one pipe 11 or the other pipe 12 and extending in a straight line are attached in a direction to be drawn into the one pipe 11 or the other pipe 12. the convex portion 19 thereby energizing possess a spring 26 for urging in a direction received in the recess 23c, the convex portion 19 is provided on one of the pipes 11 and concentric recesses 23c of the concave portion 23 and the other It is provided concentrically with the pipe 12, and the first shaft 21 is formed on the convex portion 19. The first insertion hole 19d formed in a heart shape is slidably inserted, the second shaft 22 is inserted into the second insertion hole 23d formed concentrically in the concave portion 23, and the base end portion of the connecting shaft 24 Is connected to the first shaft 21 through a first pin 31 so as to be rotatable, and the tip end of the connecting shaft 24 is connected to the second shaft 22 through a second pin 32 so as to be rotatable. The spring 26 urges the first shaft 21 and the connecting shaft 24 in a direction to draw the one shaft 11 into the one pipe 11, and a predetermined end of the base end portion of the connecting shaft 24 from the base end surface of the connecting shaft 24 is predetermined. A portion closer to the center by a distance L is rotatably connected to the first shaft 21 via the first pin 31, and the connecting shaft 24 is orthogonal to the first shaft 21 and lies on the end surface of the convex portion 19. This prevents the connecting shaft 24 from being pulled into the one pipe 11 by the elastic force of the spring 26. There is in the place that has been constructed sea urchin.

The invention according to 請 Motomeko 2 is the invention according to claim 1, further as shown in FIG. 1, wherein the spring 26 is a compression coil spring.

According to the first aspect of the present invention, when the folded stick is extended, the first shaft, the connecting shaft, and the second shaft are extended in a straight line against the elastic force of the spring. The first shaft, the connecting shaft, and the second shaft are drawn into one pipe or the other pipe, and the convex portion is accommodated in the concave portion. Thereby, one pipe and the other pipe are fixed in an extended state by the convex portion accommodated in the concave portion. On the other hand, when the extended stick is folded, the convex portion is pulled out from the concave portion against the elastic force of the spring, and the first shaft, the connecting shaft and the second shaft are placed in one pipe or the other pipe. After pulling out from the pipe, the axis of one pipe and the axis of the other pipe are shifted in parallel. As a result, although the second axis is parallel to the first axis, the axis of the second axis does not coincide with the axis of the first axis, so the other pipe rotates in a direction along one pipe. Then, the other pipe can be folded for one type. At this time, since the connecting shaft is orthogonal to the first axis and the second axis is orthogonal to the connecting axis, even if the elastic force of the spring acts on the first axis or the second axis, It is not drawn into one pipe or the other. By such a simple operation, the walking stick can be converted into an extended state or a folded state. In addition, since a relatively large number of parts are required, parts management becomes complicated, and the stick of the present invention has a simple structure as compared with the conventional pipe connection structure that increases the number of manufacturing steps. In addition, the number of assembly steps can be reduced.

In the invention according to claim 1 , when the folded stick is extended, the first shaft, the connecting shaft, and the second shaft are extended in a straight line against the elastic force of the spring. The first shaft, the connecting shaft, and the second shaft are pulled into one pipe by force, and the convex portion is accommodated in the concave portion. Thereby, one pipe and the other pipe are fixed in an extended state by the convex portion accommodated in the concave portion. On the other hand, when the extended stick is in a folded state, the convex portion is pulled out from the concave portion against the elastic force of the spring and the first shaft, the connecting shaft and the second shaft are pulled out from the inside of one pipe. The axis of the other pipe is shifted parallel to the other pipe. As a result, although the second axis is parallel to the first axis, the axis of the second axis does not coincide with the axis of the first axis, so the other pipe is rotated around the second pin. And the other pipe can be folded for one type. In this way, the stick can be converted into the extended state or the folded state by a simple operation. Further, when the walking stick is folded, a portion of the base end portion of the connecting shaft that is closer to the center by a predetermined distance from the base end surface of the connecting shaft is rotatably connected to the first shaft via the first pin. Since the shaft is orthogonal to the first axis and lies on the end face of the convex portion, the elastic force of the spring acts on the connecting shaft, but it is ensured that the connecting shaft is drawn into one pipe. Can be prevented. For this reason, even if an impact is applied to the folded stick, the connecting shaft is not unintentionally drawn into the first pipe.

In the invention according to claim 2 , since the spring is a compression coil spring, the spring is interposed between the convex portion and the first shaft, or is interposed between the concave portion and the second shaft, After the connecting member is temporarily assembled, it can be assembled into the pipe. As a result, the stick can be easily assembled.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 7, the foldable walking stick 10 includes a plurality of pipes 11 to 14 and a plurality of connecting members 16 that connect these pipes in series. The number of the pipes 11 to 14 is four in this embodiment. These pipes include a first pipe 11 having a handle 17 held by a user at one end, a second pipe 12 having one end connected to the other end of the first pipe 11 via a connecting member 16, and a second pipe 12. It consists of a third pipe 13 having one end connected to the other end of the two pipes 12 via a connecting member 16 and a fourth pipe 14 having one end connected to the other end of the third pipe 13 via a connecting member 16. . The first to fourth pipes 11 to 14 are configured to be changeable to a folded state or an extended state by the connecting member 16. The connecting member 16 that connects the first and second pipes 11 and 12, the connecting member 16 that connects the second and third pipes 12 and 13, and the connecting member that connects the third and fourth pipes 13 and 14. Since all 16 are configured in the same manner, the connecting member 16 that connects the first and second pipes 11 and 12 will be described as a representative, and the connecting member 16 that connects the second and third pipes 12 and 13 will be described. Description of the connecting member 16 that connects the third and fourth pipes 13 and 14 is omitted. In addition, the code | symbol 18 in FIG. 1 is the stone thrust member attached to the other end of the 4th pipe 14. FIG. Further, the number of pipes is not four, but may be two, three, or five or more.

  The connecting member 16 includes a convex portion 19 projecting from the end portion of the first pipe 11, a concave portion 23 provided in the end portion of the second pipe 12, and a first shaft 21 penetrating the convex portion 19. A second shaft 22 penetrating through the concave portion 23, a connecting shaft 24 connecting the first shaft 21 and the second shaft 22, and a spring 26 housed in the first pipe 11 (FIGS. 1 to 1). FIG. 4). The convex portion 19 includes a convex portion insertion piece 19 a that is inserted into the end of the first pipe 11, and a convex portion insertion piece that is provided integrally with the convex portion insertion piece 19 a. The convex portion flange 19b having a diameter larger than 19a and the convex portion flange 19b are provided integrally with the convex portion insertion piece 19a when the first pipe 11 is inserted into the first pipe 11. A protruding portion 19c protruding from the end of the projection, a first insertion hole 19d formed through the protruding portion flange 19b, the protruding portion flange 19b, and the protruding portion 19c. (FIGS. 1 and 4). The convex portion insertion piece 19a, the convex portion flange 19b, and the convex portion protruding piece 19c are formed so that their axes coincide with each other. Accordingly, the protruding portion 19 c for the convex portion is concentric with the first pipe 11 when the inserting portion 19 a for the convex portion is inserted into the first pipe 11. The first insertion hole 19d is formed so that the hole center thereof coincides with each axis of the convex portion insertion piece 19a, the convex portion flange 19b, and the convex portion protruding piece 19c. Furthermore, the base end portion of the protruding portion 19c for the convex portion is formed in a cylindrical shape, and is formed in a tapered shape from the center portion to the distal end portion of the protruding portion 19c for the convex portion.

  On the other hand, the concave portion 23 is provided integrally with the concave portion insertion piece 23a inserted into the end portion of the second pipe 12 and the concave portion insertion piece 23a. A concave portion flange 23b having a large diameter, a concave portion 23c formed from the concave portion flange 23b to the concave portion insertion piece 23a and capable of accommodating the convex portion protruding piece 19c, and a bottom portion of the concave portion 23c It consists of the 2nd penetration hole 23d which penetrates the bottom wall 23e to form (FIG.1 and FIG.4). The hole core of the concave portion 23c is formed so as to coincide with the axis of the concave portion insertion piece 23a and the concave portion flange 23b. Thereby, the concave portion 23 c is concentric with the second pipe 12 when the concave portion insertion piece 23 a is inserted into the second pipe 12. Further, the second insertion hole 23d is formed so that its hole center coincides with the axis of the recessed portion insertion piece 23a. Further, the inner diameter of the concave portion 23c is formed slightly larger than the outer diameter of the base end portion of the protruding portion 19c for the convex portion. As a result, the protruding portion 19c for the convex portion is smoothly accommodated in the concave portion 23c, and the protruding portion 19c for the convex portion is not rattled within the concave portion 23c after being accommodated.

  The first shaft 21 is slidably inserted into the first insertion hole 19d, and the first shaft main body 21a is provided integrally with the first shaft main body at the base end of the first shaft main body 21a. The first stopper portion 21b having a larger diameter, the first pin hole 21c formed at the tip of the first shaft body 21a, and the tip of the first shaft body 21a are notched to a predetermined width and a predetermined depth. And the first groove 21d (FIGS. 1, 4 and 5). The second shaft 22 is slidably inserted into the second insertion hole 23d, and the second shaft main body 22a is provided integrally with the second shaft main body at the base end of the second shaft main body 22a. A second stopper portion 22b having a larger diameter than the main body, a second pin hole 22c formed at the tip of the second shaft main body 22a, and a notch formed at the tip of the second shaft main body 22a with a predetermined width and a predetermined depth. The second groove 22d is formed (FIGS. 1, 4 and 6). Further, the connecting shaft 24 is formed at a cylindrical shaft main body 24a, a first plate-like portion 24b formed at the base end portion of the shaft main body 24a and insertable into the first groove 21d, and a tip end portion of the shaft main body 24a. A second plate-like portion 24c that can be inserted into the two grooves 22d, and a first pin passage that is formed in the first plate-like portion 24b and that coincides with the first pin hole 21c when the first plate-like portion is inserted into the first groove 21d. A hole 24d and a second pin through hole 24e formed in the second plate-like portion 24c and coinciding with the second pin hole 22c when the second plate-like portion is inserted into the second groove 22d.

  In this embodiment, the spring 26 is a compression coil spring. The spring 26 is loosely fitted to the first shaft 21, one end of the spring 26 is pressed against the first stopper portion 21 b, and the other end of the spring 26 is pressed against the end face of the convex portion insertion piece 19 a (FIG. 1). To FIG. 4). In addition, when the first plate-like portion 24b is inserted into the first groove 21d, the first pin 31 is inserted into the first pin hole 21c and the first pin through hole 24d, so that the base end portion of the connecting shaft 24 is the first shaft. 21 is rotatably connected to the first pin 31 via the first pin 31. Furthermore, when the second plate-like portion 24c is inserted into the second groove 22d, the second pin 32 is inserted into the second pin 22c hole and the second pin through hole 24e, so that the distal end portion of the connecting shaft 24 becomes the second shaft 22. The second pin 32 is rotatably connected to the first pin 32. The spring 26 urges the first shaft 21 and the connecting shaft 24 in a direction in which the walking stick 10 is folded into the first pipe 11, and the first shaft 21 extends in a straight line when the walking stick 10 is extended. The shaft 24 and the second shaft 22 are urged in a direction in which the shaft 24 and the second shaft 22 are pulled into the first pipe 11, and the protruding portion 19c for the convex portion is urged in a direction to be accommodated in the concave portion 23c.

  On the other hand, a portion of the base end portion of the connecting shaft 24 that is closer to the center by a predetermined distance L from the base end surface of the connecting shaft is rotatably connected to the first shaft 21 via the first pin 31 (FIG. 1 ( a) and FIG. 2). The predetermined distance L is L> 0.5D, preferably (D + t)> L>, where D is the diameter of the first insertion hole 19d, and t is the thickness of the tip of the protruding portion 19c. A range of (0.5D + t) is set. That is, the connecting shaft 24 is configured to lie on the end surface of the protruding portion 19c for the convex portion perpendicular to the first shaft 21 (i.e., to lie down), so that the connecting shaft 24 can be It is configured to prevent it from being drawn into the insertion hole 19 d, that is, the first pipe 11. Here, the reason why the predetermined distance L is limited to a range greater than 0.5D is that the connection shaft 24 may be unintentionally immersed in the first insertion hole 19d at 0.5D or less. Moreover, the upper limit of the preferable range of the predetermined distance L is limited to less than (D + t). When the upper limit of the predetermined distance L is set to (D + t) or more, the operation operation and the operation force at the time of insertion / removal of the connecting shaft 24 into / from the first insertion hole 19d are difficult. This is because it increases. In this embodiment, the spring is accommodated in the first pipe, and the spring is configured to urge the straight first shaft, the connecting shaft, and the second shaft in the direction of drawing into the first pipe. However, the spring may be housed in the second pipe, and the spring may be configured to urge the straight second shaft, the connecting shaft, and the first shaft in a direction in which the second pipe is pulled into the second pipe. The spring may be a tension coil spring instead of a compression coil spring.

  A procedure for assembling the folding stick 10 configured as described above will be described. First, after the first shaft 21 loosely fitted with the spring 26 is inserted into the first insertion hole 19 d of the convex portion 19, the base end portion of the connecting shaft 24 is connected to the distal end of the first shaft 21 via the first pin 31. (FIGS. 1 and 4). Next, after the second shaft 22 is inserted into the second insertion hole 23 d of the concave portion 23, the distal end portion of the coupling shaft 24 is coupled to the distal end of the second shaft 22 via the second pin 32. Thereby, the temporary assembly of the connecting member 16 is completed (FIGS. 2 and 3). Next, the convex portion insertion piece 19a is inserted into the other end of the first pipe 11, and the concave portion insertion piece 23a is inserted into one end of the second pipe 12 (FIGS. 1 and 4). The other end of the second pipe 12 and one end of the third pipe 13 are also connected by the connecting member 16 in the same manner as described above, and the other end of the third pipe 13 and one end of the fourth pipe 14 are also connected in the same manner as described above. (FIG. 7). Further, a handle 17 is attached to one end of the first pipe 11, and a stone thrust member 18 is attached to the other end of the fourth pipe 14 (FIG. 7). Thus, the walking stick 10 can be assembled by a simple process.

  The operation of the folding stick 10 configured as described above will be described. When the folded stick 10 is set to the extended state, first, the second pipe 12 is rotated around the second pin 32 so that the second shaft 22 is parallel to the first shaft 21 (FIG. 1B). At this time, the axis of the second shaft 22 does not coincide with the axis of the first shaft 21. Next, when the second pipe 12 is pulled away from the first pipe 11, the axes of the first shaft 21, the connecting shaft 24, and the second shaft 22 are aligned and extend in a straight line (FIG. 1 (c)). If the force pulling the second shaft 22 is gradually loosened in this state, the first shaft 21, the connecting shaft 24, and a part of the second shaft 22 are moved into the first insertion hole 19d, that is, the first shaft by the elastic force of the spring 26. While being drawn into the pipe 11, the protruding portion 19c for the convex portion is accommodated in the concave portion 23c. Thereby, the 1st pipe 11 and the 2nd pipe 12 are fixed to the expansion | extension state by the convex-shaped part 19 accommodated in the recessed part 23c (FIG.1 (d)). Similarly to the above, the third pipe 13 is fixed to the second pipe 12 in the extended state, and the fourth pipe 14 is fixed to the third pipe 13 in the extended state. With such a simple operation, the stick can be converted to the extended state.

  On the other hand, when the extended stick 10 is folded, when the second pipe 12 is first pulled in the direction away from the first pipe 11 against the elastic force of the spring 26, the protruding portion 19c for the convex portion becomes the concave portion 23c. The second shaft 22, the connecting shaft 24, and a part of the first shaft 21 are pulled out from the first pipe 11 (FIG. 1C). In this state, when the second pipe 12 is translated with respect to the first pipe 11 in the direction of shifting the axis, the second axis 22 is parallel to the first axis 21, but the axis of the second axis 22 is the first axis. The first shaft 21, the connecting shaft 24, and the second shaft 22 are stepped (FIG. 1B). Next, when the second pipe 12 is rotated around the second pin 22, the second pipe 12 is folded into the first pipe 11 (FIG. 1A). Similarly to the above, the third pipe 13 is folded to the second pipe 12, and the fourth pipe 14 is folded to the third pipe 13 (FIG. 7). With such a simple operation, the walking stick 10 can be converted into the folded state. Further, when the walking stick 10 is folded, a portion of the base end portion of the connecting shaft 24 that is closer to the center by a predetermined distance L from the base end surface of the connecting shaft 24 rotates to the first shaft 21 via the first pin 31. Since the connecting shaft 24 is orthogonally connected to the first shaft 21 and lies on the end surface of the convex portion 19c (i.e., lying) (FIG. 1A), the connecting shaft 24 has a spring 26. However, it is possible to reliably prevent the connecting shaft 24 from being drawn into the first insertion hole 19d, that is, the first pipe 11. For this reason, even if an impact is applied to the folded stick 19, the connecting shaft 24 is not unintentionally drawn into the first insertion hole 19 d, that is, the first pipe 11.

(A) is the A section enlarged view of FIG. 7 which shows the pipe connection structure of the folding type | formula stick of embodiment of this invention, (a)-(d) shows the operation procedure which makes a pipe of a folded state expansion | extension state. FIG. It is a front view of the connecting member in a folded state. It is a front view of the connecting member in the extended state. It is the BB sectional drawing of FIG.1 (d). It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. It is a front view of the foldable walking stick in the folded state.

Explanation of symbols

10 Folding cane 11 First pipe (one pipe)
12 Second pipe (the other pipe)
16 connecting member 19 convex portion 19d first insertion hole 21 first shaft 22 second shaft 23 concave portion 23c concave portion 23d second insertion hole 24 connecting shaft 26 spring 31 first pin 32 second pin

Claims (2)

A plurality of pipes (11, 12) and a plurality of connecting members (16) for connecting the plurality of pipes (11, 12) in series, the connecting members (16) by the plurality of pipes (11, 12) 12) is a folding cane that is configured to be changeable to a folded state or an extended state,
The connecting member (16)
A convex portion (19) projecting from the end of one pipe (11),
A concave portion (23) provided in an end portion of the other pipe (12) and formed with a concave portion (23c) capable of accommodating the convex portion (19);
A first axis (21) passing through the convex portion (19);
A second shaft (22) passing through the concave portion (23);
A connecting shaft (24) for connecting the first shaft (21) and the second shaft (22);
The first shaft (21), the connecting shaft (24) and the second shaft (22), which are accommodated in the one pipe (11) or the other pipe (12) and extend in a straight line, are connected to the one pipe (11). A spring (26) for urging the pipe (11) or the other pipe (12) in a pulling direction and for urging the convex part (19) in a direction to accommodate the concave part (23c). Yes, and
The convex portion (19) is provided concentrically with the one pipe (11),
The concave portion (23c) of the concave portion (23) is provided concentrically with the other pipe (12),
The first shaft (21) is slidably inserted into a first insertion hole (19d) formed concentrically with the convex portion (19),
The second shaft (22) is inserted through a second insertion hole (23d) formed concentrically with the concave portion (23),
A base end portion of the connecting shaft (24) is rotatably connected to the first shaft (21) via a first pin (31),
A distal end portion of the connecting shaft (24) is rotatably connected to the second shaft (22) via a second pin (32),
The spring (26) is accommodated in the one pipe (11),
The spring (26) urges the first shaft (21) and the connecting shaft (24) in a direction to be pulled into the one pipe (11);
Of the base end portion of the connecting shaft (24), a portion closer to the center by a predetermined distance (L) from the base end surface of the connecting shaft (24) places the first pin (31) on the first shaft (21). Via a pivotable connection,
By making the connecting shaft (24) perpendicular to the first shaft (31) and lying on the end surface of the convex portion (19), the connecting shaft (24) is brought into the elastic force of the spring (26). A pipe connecting structure for a foldable cane that is configured to prevent the pipe from being pulled into the one pipe (11) . Pipe coupling structure folding stick according to claim 1 Symbol mounting spring (26) is a compressed coil spring.

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