CN209983624U - Telescopic structure of walking stick - Google Patents

Abstract

The utility model discloses a telescopic structure of a crutch, which comprises a fixed pipe body, a first telescopic pipe, a second telescopic pipe and a third telescopic pipe which are assembled in sequence in a sliding way, wherein when the telescopic structure is operated in a telescopic way, only a first positioning bead of the first telescopic pipe needs to be pressed to lead the first telescopic pipe to be retracted into the fixed pipe body, the second telescopic pipe and the third telescopic pipe can automatically press the second positioning bead and the third positioning bead to be separated from a positioning state when the second telescopic pipe and the third telescopic pipe are retracted into the fixed sleeve and the first sleeve in a force applying and retracting way through the matching arrangement of the second positioning bead, the third positioning bead, the fixed sleeve and a positioning convex part of the first sleeve, otherwise, when the telescopic structure is pulled out for use, the first telescopic pipe, the second telescopic pipe and the third telescopic pipe can be pulled out one by one through the connection of the first positioning bead, the second positioning bead and the third positioning bead, can be conveniently and rapidly pulled out for use, and greatly improves the convenience of the structure for use.

Description

Telescopic structure of walking stick

Technical Field

The utility model relates to a walking stick technical field especially relates to a extending structure of walking stick.

Background

The traditional crutch basically comprises a handle and a crutch body, wherein the handle and the crutch body are fixedly connected with each other, and the length of the crutch body is fixed and cannot be extended or shortened at any time according to the needs of a user; on the other hand, the conventional crutch with a fixed length is inconvenient to place or carry because the length of the crutch cannot be changed or shortened arbitrarily.

In view of the above, the present inventors have made manufacturing, development and design experience of related products for many years, and have made detailed design and careful evaluation to achieve the above objectives, and finally have a practical utility model.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a telescopic structure of walking stick for solve prior art and have the handle of walking stick and the cane body by fixed the connection of each other together, the length of the cane body is fixed moreover and can't be according to the needs of user and extend or the technical problem who shortens at any time.

The utility model provides a telescopic structure of walking stick, it contains: the telescopic walking stick comprises a fixed pipe body, a first telescopic pipe, a second telescopic pipe and a third telescopic pipe, wherein the fixed pipe body is a hollow pipe body, at least one positioning hole is formed in the pipe wall of the fixed pipe body, a walking stick handle is assembled at the top end of the fixed pipe body, a fixed sleeve is sleeved at the tail end of the fixed pipe body in a matched mode, a positioning convex part is arranged on the inner wall surface of the fixed sleeve, and an inclined guide surface is formed at the bottom side of the positioning convex part; the first extension tube is assembled into the fixed tube body from bottom to top, the tube wall of the first extension tube is provided with a first limiting hole and a first penetrating hole corresponding to the positioning hole of the fixed tube body, the top end of the first extension tube is assembled into a first tube plug in a matching way, the side edge of the first tube plug forms a combination groove, the combination groove is matched with an elastic piece to form a first positioning bead, the front end of the first positioning bead is provided with a positioning part, the positioning part of the first positioning bead penetrates out of the first penetrating hole, the bottom end of the first extension tube is sleeved with a first sleeve in a matching way, the inner wall surface of the first sleeve is provided with a positioning convex part, and the positioning convex part forms an inclined guide surface; the second telescopic pipe is assembled into the first telescopic pipe from bottom to top, the pipe wall of the second telescopic pipe is provided with a second limiting hole and a second penetrating hole corresponding to the first limiting hole, the top end of the second telescopic pipe is matched with and assembled with a second pipe plug, the side edge of the second pipe plug forms a combination groove, the combination groove is matched with an elastic piece and assembled with a second positioning bead, the front end of the second positioning bead is provided with a positioning part, the positioning part of the second positioning bead penetrates out of the second penetrating hole, and the tail end of the second telescopic pipe is matched and sleeved with a second sleeve; the third telescopic pipe is assembled into the second telescopic pipe from bottom to top, a third penetrating hole is formed in the pipe wall of the third telescopic pipe corresponding to the second limiting hole, a third pipe plug is assembled at the top end of the third telescopic pipe in a matching mode, a combination groove is formed in the side edge of the third pipe plug and matched with an elastic piece assembly to form a third positioning bead, a positioning portion is arranged at the front end of the third positioning bead, the positioning portion of the third positioning bead is further penetrated out of the third penetrating hole, and a supporting seat is sleeved at the tail end of the third telescopic pipe in a matching mode.

Preferably, the first, second and third positioning beads have a position-limiting portion, and the outer diameter of the position-limiting portion is larger than the positioning portions of the first, second and third positioning beads.

Preferably, the combination grooves of the first plug, the second plug and the third plug all form a square groove body, and the limiting portions of the first positioning bead, the second positioning bead and the third positioning bead also form a square column shape corresponding to the combination groove, so that the first positioning bead, the second positioning bead and the third positioning bead are not limited in the corresponding combination grooves in a rotating manner.

Preferably, the positioning portions of the second positioning bead and the third positioning bead form an arc surface on the upper end surface, and the lower end surface forms a plane.

Preferably, the first, second and third extension tubes are provided with a pin hole, the first, second and third plugs are provided with a positioning slot corresponding to the pin hole, and a first, second and third pin are sequentially inserted into the positioning slot of the first, second and third plugs through the pin hole to clamp and fix the first, second and third plugs.

Preferably, the crutch handle has a pipe plug part and is fixedly arranged at the top end of the fixed pipe body through the pipe plug part.

Preferably, a hook rib plate is arranged on the side edge of the pipe plug.

Efficacy against the related art: when the crutch telescopic structure is in telescopic operation, only the first positioning bead of the first telescopic pipe needs to be pressed, so that the first telescopic pipe can be retracted into the fixed pipe body, the second telescopic pipe and the third telescopic pipe can be automatically pressed to be separated from a positioning state through the matching arrangement of the second positioning bead, the third positioning bead, the fixed sleeve and the positioning convex part of the first sleeve when the second telescopic pipe and the third telescopic pipe are retracted by applying force, and then the second telescopic pipe and the third telescopic pipe are retracted in sequence, so that the convenience of retraction and retraction of the structure is greatly improved, the first limiting hole of the first telescopic pipe and the second limiting hole of the second telescopic pipe can be clamped and positioned by the positioning convex part, the retraction and positioning state is really achieved, and meanwhile, the condition of loosening and sliding out is avoided.

Otherwise, when the telescopic structure is pulled out for use, the first telescopic pipe, the second telescopic pipe and the third telescopic pipe can be pulled out one by one in a linkage manner through the connection of the first positioning bead, the second positioning bead and the third positioning bead, so that the telescopic structure can be conveniently and quickly pulled out for use, the convenience of structural use is improved, and the practicability is increased by facilitating the use.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention;

fig. 2 is an exploded view of an embodiment of the present invention;

fig. 3 is an exploded view of each of the telescopic rods and the pipe plugs thereof according to the embodiment of the present invention;

fig. 4 is a combined cross-sectional view of an embodiment of the present invention;

fig. 5 is a partially enlarged schematic view (one) of the embodiment of the present invention corresponding to fig. 4;

fig. 6 is a partially enlarged schematic view (ii) of fig. 4 according to an embodiment of the present invention;

fig. 7 is a combined cross-sectional view from another angle of an embodiment of the present invention;

fig. 8 is a partially enlarged schematic view (one) of the embodiment of the present invention corresponding to fig. 7;

fig. 9 is a partially enlarged schematic view (ii) of fig. 7 according to an embodiment of the present invention;

fig. 10 is a schematic drawing of the drawing operation according to the embodiment of the present invention;

fig. 11 is a cross-sectional view showing a pulled-out state of the embodiment of the present invention;

fig. 12 is another angular cross-sectional view of the embodiment of the present invention in a pulled-out state;

fig. 13 is a perspective view of the embodiment of the present invention in a pulled-out state;

fig. 14 is a schematic view of a folding operation and a partial enlarged view thereof according to an embodiment of the present invention (a);

fig. 15 is a schematic view of a folding operation and a partial enlarged view thereof according to an embodiment of the present invention;

fig. 16 is a schematic view of a folding operation and a partial enlarged view thereof according to an embodiment of the present invention (iii).

Description of the symbols: 10 fixing the pipe body; 11, positioning holes; 12 a crutch handle; a 121 tube plug portion; 122 hook rib plates; 13 fixing the sleeve; 131 positioning protrusions; 132 a beveled guide surface; 20 a first extension tube; 21 a first limiting hole; 22 a first through hole; 23 bolt holes; 24 a first plug; 241 combination groove; 242 positioning grooves; 243 an elastic member; 25 a first spacer bead; 251 a limiting part; 252 a positioning part; 26 a first latch; 27 a first sleeve; 271 a positioning boss; 272 a beveled guide surface; 30 a second extension tube; 31 a second limiting hole; 32 second through holes; 33 bolt holes; 34 a second plug; 341 combination groove; 342 is positioned in the groove; 343 an elastic member; 35 a second positioning bead; 351 a position limiting part; 352 a positioning section; 353 arc surface; 354 plane; 36 a second bolt; 37 a second sleeve; 40 a third telescopic tube; 41 a third through hole; 42 bolt holes; 43 a third plug; 431 a combination groove; 432 a positioning groove; 433 an elastic member; 44 a third positioning bead; 441 limit part; 442 a positioning part; 443 circular arc surface; 444 plane; 45 a third bolt; 46 against the seat.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

First, referring to fig. 1, 2 and 3, an embodiment of the present invention provides a telescopic structure of a crutch, including: a fixed tube 10, a first extension tube 20, a second extension tube 30 and a third extension tube 40.

The fixing tube 10 is a hollow tube and at least has a positioning hole 11 on the tube wall, a crutch handle 12 is assembled on the top end of the fixing tube 10, the crutch handle 12 has a tube plug portion 121 and is fixed on the top end of the fixing tube 10 through the tube plug portion 121, a hook rib plate 122 is arranged on the side of the tube plug portion 121, a fixing sleeve 13 is sleeved on the end of the fixing tube 10, a positioning convex portion 131 is arranged on the inner wall surface of the fixing sleeve 13, and an inclined guide surface 132 is formed on the bottom side of the positioning convex portion 131.

The first extension tube 20 is assembled into the fixed tube 10 from bottom to top, the tube wall thereof is provided with a first limiting hole 21, a first through hole 22 corresponding to the positioning hole 11 of the fixed tube 10, and a bolt hole 23, the top end of the first extension tube 20 is assembled into a first tube plug 24 in a matching manner, the side of the first tube plug 24 forms a combination groove 241 and a positioning groove 242, the combination groove 241 is a square groove body and is matched with an elastic member 243 to be provided with a first positioning bead 25, the first positioning bead 25 is provided with a limiting part 251 and a positioning part 252 positioned at the front end of the limiting part 251, the limiting part 251 and the positioning part 252 are both in a square column shape, the outer diameter of the limiting part 251 is larger than that of the positioning part 252, the limiting part 251 is non-rotatably limited in the combination grooves 241, the positioning part 252 of the first positioning bead 25 passes through the first through hole 22, and finally a first bolt 26 is inserted into the positioning groove 242 through the bolt hole 23, the first plug 24 is engaged and fixed, and the end of the first extension tube 20 is fittingly sleeved with a first sleeve 27, the inner wall of the first sleeve 27 is provided with a positioning protrusion 271, and an inclined guide surface 272 is formed at the bottom side of the positioning protrusion 271.

The second extension tube 30 is assembled into the first extension tube 20 from bottom to top, the tube wall is provided with a second limiting hole 31, a second through hole 32 corresponding to the first limiting hole 21 and a plug hole 33, the top end of the second extension tube 30 is assembled with a second plug 34 in a matching way, the side edge of the second plug 34 forms a combination groove 341 and a positioning groove 342, the combination groove 341 is a square groove body and is assembled with an elastic member 343 to form a second positioning bead 35, the second positioning bead 35 is provided with a limiting part 351 and a positioning part 352 positioned at the front end of the limiting part 351, the outer diameter of the limiting part 351 is larger than that of the positioning part 352, the limiting part 351 also forms a square column shape corresponding to the combination groove 341, so that the limiting part 351 is not rotationally limited in the combination grooves 341, the upper end surface of the positioning part 352 forms an arc surface 353, the lower end surface forms a plane 354, and the positioning part 352 of the second positioning bead 35 passes through the second through hole 32, finally, a second pin 36 is inserted into the positioning slot 342 through the pin hole 33 to achieve the locking and fixing of the second plug 34, and a second sleeve 37 is fittingly sleeved on the end of the second extension tube 30.

The third extension tube 40 is assembled into the second extension tube 30 from bottom to top, a third through hole 41 and a plug hole 42 are formed on the tube wall corresponding to the second position-limiting hole 31, a third plug 43 is assembled at the top end of the third extension tube 40, a combination groove 431 and a positioning groove 432 are formed on the side of the third plug 43, the combination groove 431 is a square groove body and is assembled with an elastic member 433 to form a third positioning bead 44, the third positioning bead 44 has a position-limiting portion 441 and a positioning portion 442 located at the front end of the position-limiting portion 441, the outer diameter of the position-limiting portion 441 is larger than that of the positioning portion 442, the position-limiting portion 441 also forms a square column shape corresponding to the combination groove 431, so that the position-limiting portion 441 is not rotationally limited in the combination grooves 431, the upper end surface of the positioning portion 442 forms an arc surface 443, the lower end surface forms a plane 444, and the positioning portion 442 of the third positioning bead 44 passes through the third through hole 41, finally, a third pin 45 is inserted into the positioning slot 432 through the pin hole 42 to achieve the locking and fixing of the third plug 43, and the end of the third telescopic tube 40 is fittingly sleeved with a support base 46.

Referring to fig. 2 and 3 in conjunction with fig. 4, 5 and 6 and fig. 7 and 8, the fixed tube 10, the first extension tube 20, the second extension tube 30 and the third extension tube 40 are assembled in a sliding manner, wherein the third extension tube 40 is assembled with the third plug 43 at the top end, the third positioning bead 44 is protruded out of the third through hole 41, the third plug 43 is fixed at the top end of the third extension tube 40 by inserting the plug hole 42 into the third plug 45, the third extension tube 40 can be assembled into the second extension tube 30 from bottom to top, the third positioning bead 44 is pressed by the inner wall of the second extension tube 30 and retracted into the third through hole 41, the end of the third extension tube 40 is protruded out of the end of the second extension tube 30, the top end of the second extension tube 30 is assembled with the second plug 34, and the second positioning bead 35 is protruded out of the second through hole 32, then the second bolt 36 is inserted into the bolt hole 33 to fix the second plug 34 at the top end of the second extension tube 30, after the assembly of the second and third extension tubes 30, 40 is completed, the second extension tube 30 is assembled into the first extension tube 20 from bottom to top, and the second positioning bead 35 is extruded by the inner wall of the first extension tube 20 to be retracted into the second through hole 32, meanwhile, the end of the second extension tube 30 is protruded out of the end of the first extension tube 20, at this time, the first plug 24 is assembled at the top end of the first extension tube 20, after the assembly of the first and second extension tubes 20, 30 is completed, the first extension tube 20 is assembled into the fixed tube 10 from bottom to top, and the first positioning bead 25 is extruded by the inner wall of the fixed tube 10 to be retracted into the first through hole 22, and the protruded end of the first extension tube 20 is disposed at the end of the fixed tube 10, therefore, the third, second, and one extension tubes 40, 30, and 20 and the fixed tube 10 are sequentially connected in a sliding manner, a fixed sleeve 13 is sleeved at the end of the fixed tube 10, a first sleeve 27 is sleeved at the end of the first extension tube 20, a second sleeve 37 is sleeved at the end of the second extension tube 30, a support seat 46 is arranged at the end of the third extension tube 40, the fixed sleeve 13, the first, second, and third sleeves 27, 37, and 46 are abutted and limited with each other to prevent the ends of the first, second, and third extension tubes 20, 30, and 40 from retracting into the corresponding fixed tube 10, first extension tube 20, and second extension tube 30, and finally a crutch handle 12 is assembled at the top end of the fixed tube 10 by a tube plug 121 to complete a crutch structure.

Referring to fig. 9 to 13, when a user pulls out the third extension tube 40 by applying force, the third extension tube 40 can be easily pulled out without being limited, and the positioning portion 442 of the third positioning ball 44 passes through the third through hole 41 and is engaged with the second limiting hole 31 of the second extension tube 30 to form a positioning, and the lower end surface of the third positioning ball 44 forms a plane 444 to firmly abut against the end edge of the second limiting hole 31 of the second extension tube 30, so as to prevent the third extension tube 40 from being pulled out again to reach the limitation of length, and simultaneously connect the third extension tube 40 and the second extension tube 30 to be able to drive the second extension tube 30 out, and when pulling out by applying force continuously, the second extension tube 30 will be pulled out along the first extension tube 20, and the positioning portion 352 of the second positioning ball 35 will pass through the second through hole 32 and be engaged with the first extension tube 20 in the pulling out process The position-limiting hole 21 is formed for positioning, and the lower end face of the second positioning bead 35 forms a plane 354, which can be firmly abutted against the end edge of the first position-limiting hole 21 of the first extension tube 20, so as to prevent the second extension tube 30 from being pulled out again to reach the limit of length, and at the same time, the second extension tube 30 is connected with the first extension tube 20, so as to be able to drive the first extension tube 20 out again, and at this time, when pulling out continuously by applying force, the first extension tube 20 can be pulled out from the fixed tube 10, and the positioning portion 252 of the first positioning bead 25 is penetrated out from the first penetrating hole 22 and is clamped in the positioning hole 11 of the fixed tube 10, thereby the first, second and third extension tubes 20, 30 and 40 can be pulled out and positioned in sequence for a user to hold and support, and the positioning portion 252 of the first positioning bead 25 is in a square column shape, and can form four-periphery abutting and limiting with the positioning hole 11 of the fixed tube 10, not only the first extension tube 20 is prevented from being pulled out again to reach the limit of length, but also the fixed tube 10 is prevented from extruding the first positioning bead 25 due to the supporting of force application, thereby preventing the first extension tube 20 from being retracted into the fixed tube 10 during use, and greatly improving the safety of the structure use.

On the contrary, when the crutch structure is to be retracted and folded after use, referring to fig. 14, 15 and 16, the user can fold the third telescopic tube 40 upward by applying force, or fold the third telescopic tube 40 downward by applying force from the fixed tube 10, first, press the first positioning bead 25 and sequentially retract into the positioning hole 11 and the first through hole 22, so that the first telescopic tube 20 and the fixed tube 10 are separated from the positioning of the first positioning bead 25 and can be folded by sliding, when the first telescopic tube 20 retracts into the fixed tube 10, the second telescopic tube 30 is simultaneously linked to move toward the fixed tube 10, at this time, the second positioning bead 35 protruded out of the first limiting hole 21 will gradually approach the fixed sleeve 13, and the arc surface 353 of the positioning portion 352 is pressed by the slant guiding surface 132 and the positioning convex portion 131 of the fixed sleeve 13, further, the second positioning ball 35 is pressed to sequentially retract into the first position-limiting hole 21 and the second through hole 32, so that the second extension tube 30 and the first extension tube 20 are separated from the positioning of the second positioning ball 35 and can be slidably folded, and simultaneously the positioning protrusion 131 is embedded into the first position-limiting hole 21 to form positioning (as shown in fig. 6), and when the second extension tube 30 retracts into the first extension tube 20, the third extension tube 40 is linked to move towards the first extension tube 20, at this time, the third positioning ball 44 protruding from the second position-limiting hole 31 gradually approaches the first sleeve 27 and is pressed by the inclined guide surface 272 and the positioning protrusion 271 of the first sleeve 27, so that the third positioning ball 44 is pressed to sequentially retract into the second position-limiting hole 31 and the third through hole 41, so that the third extension tube 40 and the second extension tube 30 are separated from the positioning of the third positioning ball 44 and can be folded inwards, after the positioning protrusion 271 rebounds, it will be embedded in the second limiting hole 31 to form a positioning (as shown in fig. 9), so that the first, second, and third telescopic tubes 20, 30, and 40 can be retracted, thereby greatly reducing the volume of the structure, and facilitating the user to store and carry.

With the structure of the above embodiment, the following benefits can be obtained: when the telescopic structure of the crutch is in telescopic operation, only the first positioning ball 25 of the first telescopic tube 20 needs to be pressed, so that after the first telescopic tube 20 is retracted into the fixed tube 10, the second and third telescopic tubes 30, 40 can be automatically pressed to be separated from the positioning state through the matching arrangement of the second and third positioning balls 35, 44 and the positioning protrusions 131, 271 of the fixed sleeve 13 and the first sleeve 27 when the telescopic structure is retracted by applying force, so that the second and third telescopic tubes 30, 40 can be retracted and retracted in sequence, thereby greatly improving the convenience of the structure for retraction and retraction, and the first limiting hole 21 of the first telescopic tube 20 and the second limiting hole 31 of the second telescopic tube 30 can be more clamped and positioned by the positioning protrusions 131, 271, thus really achieving the state of the retraction and positioning and avoiding the condition of loosening and sliding out.

On the contrary, when the telescopic tube is pulled out for use, the first, second and third telescopic tubes 20, 30 and 40 can be pulled out one by one through the connection of the first, second and third positioning beads 25, 35 and 44, so that the telescopic tube can be conveniently and quickly pulled out for use, the convenience of structural use is improved, and the practicability is increased by being beneficial to use.

To sum up, the present invention has achieved a breakthrough structural design, and has improved utility model content, and can achieve industrial utilization and progress.

The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims (7)

1. A telescopic structure of a crutch is characterized by comprising:

the fixing pipe body is a hollow pipe body, at least one positioning hole is formed in the pipe wall of the fixing pipe body, a crutch handle is assembled at the top end of the fixing pipe body, a fixing sleeve is sleeved at the tail end of the fixing pipe body in a matched mode, a positioning convex part is arranged on the inner wall surface of the fixing sleeve, and an inclined guide surface is formed at the bottom side of the positioning convex part;

a first telescopic pipe which is assembled into the fixed pipe body from bottom to top, the pipe wall of the first telescopic pipe is provided with a first limiting hole and a first penetrating hole corresponding to the positioning hole of the fixed pipe body, the top end of the first telescopic pipe is assembled into a first pipe plug in a matching way, the side edge of the first pipe plug forms a combination groove, the combination groove is matched with an elastic piece to form a first positioning bead, the front end of the first positioning bead is provided with a positioning part, the positioning part of the first positioning bead penetrates out of the first penetrating hole, the tail end of the first telescopic pipe is sleeved with a first sleeve in a matching way, the inner wall surface of the first sleeve is provided with a positioning convex part, and the bottom side of the positioning convex part forms an inclined guide surface;

a second telescopic pipe which is assembled into the first telescopic pipe from bottom to top, wherein the pipe wall of the second telescopic pipe is provided with a second limiting hole and a second penetrating hole corresponding to the first limiting hole, the top end of the second telescopic pipe is matched with and assembled with a second pipe plug, the side edge of the second pipe plug forms a combination groove which is matched with an elastic piece and assembled with a second positioning bead, the front end of the second positioning bead is provided with a positioning part, the positioning part of the second positioning bead penetrates out of the second penetrating hole, and the tail end of the second telescopic pipe is matched and sleeved with a second sleeve;

a third telescopic tube assembled into the second telescopic tube from bottom to top, the wall of the third telescopic tube having a third through hole corresponding to the second limiting hole, a third plug assembled with the top end of the third telescopic tube, a combination groove formed on the side of the third plug, a third positioning bead assembled with an elastic member, a positioning part at the front end of the third positioning bead, a positioning part of the third positioning bead passing through the third through hole, and a support seat assembled with the end of the third telescopic tube.

2. The telescopic structure of a crutch of claim 1 wherein each of the first, second and third positioning beads has a limiting portion with an outer diameter greater than the positioning portions of the first, second and third positioning beads.

3. The telescopic structure of a crutch of claim 1 wherein the combination grooves of the first tube plug, the second tube plug, and the third tube plug all form a square groove, and the limiting portions of the first positioning bead, the second positioning bead, and the third positioning bead form a square column shape corresponding to the combination grooves, thereby restricting the first positioning bead, the second positioning bead, and the third positioning bead in the corresponding combination grooves without rotation.

4. The telescopic structure of a crutch of claim 1 wherein the positioning portions of the second and third positioning beads each form an arc surface on the upper end surface and a flat surface on the lower end surface.

5. The telescopic structure of a crutch of claim 1 wherein the first, second, and third telescoping tubes are each provided with a pin hole, the first, second, and third plugs are each provided with a positioning slot corresponding to the pin hole, and a first, second, and third pin are sequentially inserted into the positioning slots of the first, second, and third plugs through the pin holes to achieve the purpose of locking and fixing the first, second, and third plugs.

6. The telescopic structure of a crutch of claim 1 wherein the crutch handle has a tube stopper and is fixedly attached to the top end of the fixed tube via the tube stopper.

7. The telescoping structure of a crutch of claim 6 wherein the side of the plug portion is provided with a hook rib.

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