CN112956791B

CN112956791B - Variable walking stick

Info

Publication number: CN112956791B
Application number: CN202110227866.6A
Authority: CN
Inventors: 王曙光; 邢巧巧; 邢淼淼; 李勇; 张跃飞; 戴本尧; 庄千芳
Original assignee: Zhejiang Industry and Trade Vocational College
Current assignee: Zhejiang Industry and Trade Vocational College
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2022-07-08
Anticipated expiration: 2041-03-01
Also published as: CN112956791A

Abstract

The invention relates to a variable crutch, which comprises a telescopic adjustable crutch rod, wherein the upper end of the crutch rod is provided with a grip, the lower end of the crutch rod is provided with a variable supporting mechanism, the variable supporting mechanism comprises a movable ring, a lower fixed seat and a plurality of supporting foot components which are uniformly distributed along the circumferential direction of the crutch rod, the movable ring is sleeved on the crutch rod in an axially sliding manner, the lower fixed seat is fixed at the bottom end of the crutch rod, the supporting leg assembly comprises a supporting leg and a connecting rod, the movable ring is fixedly connected with a manual push-pull sleeve, the manual push-pull sleeve can axially slide along the crutch rod and can be locked on the crutch rod, the supporting leg comprises a connecting arm, one end of the connecting arm is hinged on the movable ring, the other end of the connecting arm extends to form a ground-contacting foot arranged at an obtuse angle with the connecting arm, after the supporting legs are opened, the ground contacting feet are perpendicular to the ground, the ground contacting feet are provided with rubber pads, one end of the connecting rod is hinged to the lower fixing seat, and the other end of the connecting rod is hinged to the middle of the connecting arm of the supporting legs. Has the advantages of simple structure, portability and convenient operation.

Description

Variable walking stick

Technical Field

The invention relates to the technical field of articles for daily use, in particular to a crutch, and particularly relates to a variable crutch capable of realizing single-foot support and four-foot support conversion.

Background

With the increasing aging of the population, the number of the aged population is increased, and the aged population has to receive more attention. With the age, the physiological function of the elderly gradually declines, and the physical ability obviously declines. The crutch is widely applied as a simple apparatus for assisting walking. The traditional walking stick is supported by a single foot and multiple feet (generally four feet), the walking stick supported by the single foot is portable to carry, but the stability is insufficient, and the walking stick supported by the four feet is stable and inconvenient to carry.

In order to overcome the defects of the single-foot crutch and the four-foot crutch and facilitate the use, the technical scheme of modifying the crutch exists in the prior art, and the application number designed and disclosed by the inventor is as follows: CN 201910554961.X, entitled "a safe crutch suitable for the elderly", includes a retractable crutch rod and a support handle arranged at one end of the crutch rod; the other end of the crutch bar is provided with a fixed seat; a disc is sleeved on the crutch rod above the fixed seat, and the disc can move along the axial direction of the crutch rod under the action of external force; the outer side of the disc is movably connected with a plurality of connecting rods; one end of the connecting rod is connected to the disc and swings relative to the disc; the other end of the connecting rod is movably connected with a clamping claw; the clamping claw is movably connected with the fixed seat, and swings relative to the fixed seat by taking the middle part of the clamping claw as an axis; when the disc moves along the axial direction of the crutch rod, the connecting rod is driven to move up and down so as to drive the clamping claws to swing, the folding and the separation between the clamping claws are realized, and the disc is driven by the motor driving mechanism. Under the structural design of the walking stick, the fixed seat has large volume, and the walking stick is driven by an electric motor, so that the walking stick has a complex mechanism, so that the whole walking stick has heavy weight and is not easy to carry and use; in addition, under the electric driving, the supporting stability of the crutch during the four-foot supporting is ensured, the locking of the four-foot after the four-foot opening is more critical, and the self-locking function of the electric driving mechanism cannot be well realized only by the self-locking function of the electric driving mechanism, so that the locking mechanism is mostly required to be specially set, and in addition, the electronic device needs to be designed to be dustproof and waterproof, and the like, so that the electric driving structure causes the structure of the crutch to be complicated and the lightness cannot be realized; most of the existing crutch in the market are designed electrically, and few crutches are simply designed and convenient to operate manually.

Disclosure of Invention

The invention aims to: in order to overcome the defects in the prior art, the invention provides the variable crutch which is simple in structure, light and convenient to operate.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a but variable type walking stick, includes the cane pole of scalable regulation, and cane pole upper end is equipped with the handle, and cane pole lower extreme is equipped with variant supporting mechanism, and variant supporting mechanism includes movable ring, lower fixing base and a plurality of supporting legs subassembly along cane pole circumference evenly distributed, but movable ring endwise slip's cover is located on the cane pole, and lower fixing base is fixed in cane pole bottom, supporting legs subassembly includes supporting leg and connecting rod, its characterized in that: the movable ring is fixedly connected with a manual push-pull sleeve, the manual push-pull sleeve can axially slide along the crutch rod and can be locked on the crutch rod, the supporting leg comprises a connecting arm, one end of the connecting arm is hinged to the movable ring, the other end of the connecting arm extends to form a ground-contact foot arranged at an obtuse angle with the connecting arm, the ground-contact foot is perpendicular to the ground after the supporting leg is opened, a rubber pad is arranged on the ground-contact foot, one end of a connecting rod is hinged to the lower fixing seat, and the other end of the connecting rod is hinged to the middle of the connecting arm of the supporting leg.

By adopting the technical scheme, the sleeve is pushed and pulled manually to drive the movable ring to slide along the crutch body, the supporting legs are folded and unfolded at one end contacting with the ground feet under the limitation of the connecting rod, and the deformation supporting mechanism is folded and converted into a single-foot support and unfolded into a multi-foot support form; the structure form of the supporting leg assembly is changed, meanwhile, manual operation is achieved, and the structure is simple, the manufacturing cost is low, and the operation is convenient.

Preferably, the manual push-pull sleeve is provided with an elastic holding sleeve relative to the other end of the movable ring, the elastic holding sleeve is provided with an external thread, the elastic holding sleeve is provided with a plurality of holding pieces which are arranged along the circumferential direction, the external thread of the elastic holding sleeve is rotatably provided with a nut sleeve, and the nut sleeve is rotated to control the holding pieces of the elastic holding sleeve to hold the crutch tightly or loosen the crutch rod. Under this structural design, locking and unlocking of manual push-and-pull sleeve simple structure, convenient operation.

Preferably, the nut sleeve is a hand-held piece of a push-pull driving manual push-pull sleeve, the lower end of the nut sleeve extends to form a limiting sleeve, an anti-drop bulge protrudes from a sleeve hole of the limiting sleeve, a stop convex ring matched with the stop of the anti-drop bulge protrudes from the manual push-pull sleeve, and the anti-drop bulge is stopped by the stop convex ring when the nut sleeve moves to the elastic clasping sleeve along one end of the elastic clasping sleeve to loosen the crutch rod without dropping out of the position of the elastic clasping sleeve, so that the nut sleeve is prevented from being unscrewed from the elastic clasping sleeve. Under this structural design, when the walking stick is out of shape the operation, conveniently unscrew operation nut cover, and can not unscrew the nut cover completely, the direct push-and-pull operation nut cover of being convenient for reaches the walking stick and draws in, opens the deformation operation, and the cooperation of anticreep arch and backstop bulge loop provides the stress point through the manual push-and-pull sleeve of nut cover pulling, has easy operation convenient advantage.

Preferably, the manual push-pull sleeve is provided with a pre-locking pin and an unlocking spring, the pre-locking pin is in sliding fit on the manual push-pull sleeve along the radial direction of the manual push-pull sleeve, the outer end of the pre-locking pin is a control end corresponding to a sleeve hole of the limiting sleeve, the inner end of the pre-locking pin is a locking end, the unlocking spring provides a reset force for driving the control end of the pre-locking pin to extend into the sleeve hole of the limiting sleeve, the crutch rod is provided with a locking hole corresponding to a position corresponding to a folding state of the driving support leg when the manual push-pull sleeve slides to the folding state and is in corresponding fit with the pre-locking pin, the limiting sleeve is positioned and rotationally fitted on the nut sleeve and slides along the axial direction of the nut sleeve, the anti-falling bulge extends along the axial direction and the circumferential direction to form a pre-locking boss, a plurality of pre-locking bosses are uniformly distributed in the circumferential direction in the sleeve hole of the limiting sleeve, and the circumferential side of each pre-locking boss is provided with an avoiding groove for accommodating the control end of the pre-locking pin to enable the locking end of the pre-locking pin to be separated from the locking hole, the limiting sleeve is provided with a control end of the pre-locking pin in the rotating direction, the control end of the pre-locking pin is located at an unlocking position in the avoidance groove, the control end of the pre-locking pin abuts against a pre-locking position on the pre-locking boss, and the pre-locking boss is provided with an axial locking distance which is used for enabling the nut sleeve to abut against the pre-locking pin when the nut sleeve is screwed into the elastic holding sleeve so as to enable the locking end of the pre-locking pin to be inserted into the locking hole. Under this structural design, after the supporting legs to the walking stick draws in the operation in, rotate the stop collar, the prelock boss presses to the control end of prelock round pin, the locking end of prelock round pin gets into the locking hole, make manual push-and-pull sleeve locking on the cane pole, later screw the nut cover, make elasticity hold the cover and hold the cane pole tightly, the prelock boss has and supplies nut cover screw in elasticity to hold contradict the prelock round pin when the cover keeps inserting the locking end of prelock round pin in the axial blocking distance in the locking hole, in the nut cover operation process of screwing promptly, manual push-and-pull sleeve is locked on the cane pole, thereby avoid the supporting legs to strut, facilitate the use.

Preferably, it is adjacent dodge groove middle part between the pre-lock boss is equipped with the locking protruding muscle, and the nut cover is located and removes elasticity and hold the cover and hold the cane pole position time, and the locking protruding muscle corresponds between pre-lock round pin and backstop bulge loop and the locking protruding muscle supports and leans on in the pre-lock round pin lateral wall, the protruding height of locking protruding muscle is less than the protruding height of pre-lock boss roof pressure pre-lock round pin, and the pre-lock round pin has the clearance of beating that does not insert the locking hole, and this clearance of beating provides the locking protruding muscle and follows the spacing sleeve axial displacement and push up the pre-lock round pin when crossing the pre-lock round pin and implement to beat and dodge. Under the structural design, in the process of screwing in and screwing out the nut sleeve, the locking convex rib crosses the pre-locking pin to realize the positioning of the nut sleeve, and the locking convex rib is matched with the pre-locking pin to provide a stress point for pushing the nut sleeve to open the supporting leg; and the locking convex rib and the pre-locking pin are matched to form gear feeling.

Preferably, the upper end of the anti-falling protrusion extends to form a positioning convex rib limited by the rotation limit position of the limiting sleeve, the stopping convex ring is provided with a positioning notch, and the positioning convex rib is in positioning fit in the positioning notch and is in stopping fit with the positioning notch along two end faces of the stopping convex ring in the circumferential direction. Under this structural design, realize the stop collar turned angle and inject, guarantee the stop collar and switch over the reliable operation between position of unblocking and the position of prelocking, and have simple structure compact advantage.

The invention is further described below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic structural view of a variable crutch according to an embodiment of the invention;

FIG. 2 is a schematic view of a partial structure of a variable crutch according to an embodiment of the invention;

FIG. 3 is a partially exploded view of a convertible crutch according to an embodiment of the invention;

FIG. 4 is a schematic view of a stop collar according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a stop collar embodying the present invention.

Detailed Description

Referring to the attached drawings 1-5, the invention discloses a variable crutch, which comprises a telescopic adjustable crutch rod 1, wherein a grip 2 is arranged at the upper end of the crutch rod 1, a variable support mechanism is arranged at the lower end of the crutch rod 1, the variable support mechanism comprises a movable ring 3, a lower fixed seat 4 and a plurality of supporting foot components uniformly distributed along the circumferential direction of the crutch rod 1, the movable ring 3 is sleeved on the crutch rod 1 in an axially sliding manner, the lower fixed seat 4 is fixed at the bottom end of the crutch rod 1, the supporting foot components comprise supporting legs 51 and connecting rods 52, the movable ring 3 is fixedly connected with a manual push-pull sleeve 6, the manual push-pull sleeve 6 can slide along the axial direction of the crutch rod 1 and can be locked on the crutch rod 1, the supporting legs 51 comprise connecting arms 511, one ends of the connecting arms 511 are hinged on the movable ring, the other ends of the connecting arms 511 extend to ground-contacting feet 512 arranged at an obtuse angle with the connecting arms 511, after the supporting legs 51 are opened, the touch foot 512 is provided with a rubber pad 513, one end of the connecting rod 52 is hinged on the lower fixed seat 4, and the other end of the connecting rod 52 is hinged in the middle of a connecting arm 511 of the supporting leg 51. The sleeve 6 is pushed and pulled manually to drive the movable ring 3 to slide along the crutch body, and the supporting leg 51 is folded and unfolded at one end contacting the ground foot under the limitation of the connecting rod 52, so that the deformation supporting mechanism is folded and converted into a single-foot support and unfolded into a multi-foot support form; the structure form of the supporting leg assembly is changed, meanwhile, manual operation is achieved, and the structure is simple, the manufacturing cost is low, and the operation is convenient.

The manual push-pull sleeve 6 is provided with an elastic holding sleeve 61 relative to the other end connected with the movable ring 3, an external thread is arranged outside the elastic holding sleeve 61, the elastic holding sleeve 61 is provided with a plurality of holding pieces 611 arranged along the circumferential direction, the external thread of the elastic holding sleeve 61 is matched with a nut sleeve 7 in a rotating mode, and the nut sleeve 7 is screwed to control the holding pieces 611 of the elastic holding sleeve to hold or loosen the crutch rod 1. The locking and unlocking structure of the manual push-pull sleeve is simple, and the operation is convenient. The nut sleeve 7 is used as an operation part for locking and unlocking the position of the manual push-pull sleeve 6, and under the condition that the pipe distance of the manual push-pull sleeve 6 is limited, the nut sleeve 7 is used as a handheld part for pushing and pulling the manual push-pull sleeve 6, so that the operation is more convenient in operation, in order to better use the nut sleeve 7 as a supporting leg retracting and expanding operation part, the lower end of the nut sleeve 7 extends to form a limiting sleeve 8, an anti-dropping bulge 81 is arranged in a sleeve hole of the limiting sleeve 8 in a protruding mode, a stopping convex ring 62 matched with the anti-dropping bulge 81 is arranged on the manual push-pull sleeve 6 in a protruding mode, the anti-dropping bulge 81 stops through the stopping convex ring 62 when the nut sleeve 7 moves to the elastic holding sleeve 61 along one end of the elastic holding sleeve 61 to release the crutch rod 1 without dropping out of the elastic holding sleeve 61, and the elastic holding sleeve 61 is prevented from being unscrewed from the elastic holding sleeve 7. When the crutch is deformed, the nut sleeve 7 is conveniently unscrewed and can not be completely unscrewed, the nut sleeve 7 is conveniently and directly pushed and pulled to achieve the operations of folding and unfolding the crutch and deforming, the anti-falling bulge 81 is matched with the stop convex ring 62, a stress point for pulling the manual push-pull sleeve 6 through the nut sleeve 7 is provided, the thread of the nut sleeve 7 can be protected, and the crutch has the advantages of simplicity and convenience in operation. The limiting sleeve 8 comprises a main body 8-1, the main body is fixedly connected with two half rings 8-2 through fasteners, and the half rings 8-2 are clamped in the annular groove of the nut sleeve 7 to realize that the limiting sleeve 8 is positioned and rotationally matched on the nut sleeve 7.

In the actual deformation operation process of the crutch, the nut sleeve 7 is driven to enable the folding operation force of the supporting leg to be opposite to the screwing operation force of the nut sleeve 7, when the supporting leg is locked after being folded, the supporting leg cannot be folded in place and is easy to be accidentally opened during operation, a pre-locking pin 91 and an unlocking spring 92 are arranged on the manual push-pull sleeve 6, the pre-locking pin 91 is matched on the manual push-pull sleeve 6 in a sliding mode along the radial direction of the manual push-pull sleeve 6, the outer end of the pre-locking pin 91 is a control end corresponding to the sleeve hole of the limiting sleeve 8, the inner end of the pre-locking pin 91 is a locking end, the unlocking spring 92 provides a reset force for driving the control end of the pre-locking pin 91 to extend into the sleeve hole of the limiting sleeve 8, a locking hole 11 is arranged on the crutch rod 1, the locking hole 11 corresponds to the position corresponding to the folding state of the manual push-pull sleeve 6 and is matched with the pre-locking pin 91 correspondingly, the limiting sleeve 8 is positioned, rotationally matched and axially slides along with the nut sleeve 7, the anti-falling bulge 81 extends along the axial direction and the circumferential direction to form a pre-locking boss 81-1, a plurality of pre-locking bosses 81-1 are uniformly distributed in the sleeve hole of the limiting sleeve 8 along the circumferential direction, the lateral side of the pre-locking boss 81-1 is provided with a guide inclined plane, the circumferential side of the pre-locking boss 81-1 is provided with an avoidance groove 82 for accommodating the control end of the pre-locking pin 91 so as to enable the locking end of the pre-locking pin 91 to be separated from the locking hole 11, the limiting sleeve 8 is provided with an unlocking position that the control end of the pre-locking pin 91 is positioned in the avoidance groove 82 and a pre-locking position that the control end of the pre-locking pin 91 abuts against the pre-locking boss 81-1 along the rotating direction, the pre-locking boss 81-1 has an axial locking distance for abutting against the pre-locking pin 91 when the nut housing 7 is screwed into the elastic clasping housing 61 to keep the locking end of the pre-locking pin 91 inserted into the locking hole 11. The pre-locking boss 81-1 may be provided with a positioning guide groove (not shown), the control end of the pre-locking pin 91 is correspondingly fitted in the positioning guide groove, and the length of the positioning guide groove is consistent with the axial locking distance. After the supporting legs of the crutch are folded, the limiting sleeve 8 is rotated, the pre-locking boss 81-1 is pressed to the control end of the pre-locking pin 91, the locking end of the pre-locking pin 91 enters the locking hole 11, the manual push-pull sleeve 6 is locked on the crutch rod 1, then the nut sleeve 7 is screwed, the elastic holding sleeve 61 holds the crutch rod 1 tightly, the pre-locking boss 81-1 has an axial locking distance for the nut sleeve 7 to abut against the pre-locking pin 91 when being screwed into the elastic holding sleeve 61 so as to keep the locking end of the pre-locking pin 91 inserted into the locking hole 11, namely, in the screwing operation process of the nut sleeve 7, the manual push-pull sleeve 6 is locked on the crutch rod 1, so that the supporting legs are prevented from being unfolded, and the crutch is convenient to use. The upper end of the anti-falling bulge 81 extends to form a positioning convex rib 81-2 limited by the rotation limit position of the limiting sleeve 8, the stopping convex ring 62 is provided with a positioning notch 621, and the positioning convex rib 81-2 is in positioning fit in the positioning notch 621 and is in stopping fit with two end faces of the positioning notch 621 along the circumferential direction of the stopping convex ring 62. Under this structural design, realize that stop collar 8 turned angle is injectd, guarantee that stop collar 8 switches the operation reliably between unblock position and prelock position, and have simple structure compact's advantage.

In the process of controlling the folding and unfolding of the supporting leg by pushing and pulling the nut sleeve 7, the nut sleeve 7 is stressed only by the thread meshing part, the thread is easy to damage, in order to solve the problem, when the nut sleeve 7 is positioned at the position of releasing the elastic holding sleeve 61 from holding the crutch rod 1, the locking convex rib 83 is correspondingly arranged between the pre-locking pin 91 and the stopping convex ring 62, the locking convex rib 83 is abutted against the side wall of the pre-locking pin 91, the protruding height of the locking convex rib 83 is smaller than the protruding height of the pre-locking pin 91 pressed by the pre-locking boss 81-1, the pre-locking pin 91 is provided with a jumping gap which is not inserted into the locking hole 11, and the jumping gap provides that the locking convex rib 83 pushes the pre-locking pin 91 to jump and avoid when the locking convex rib 83 moves axially along with the limiting sleeve 8 to cross the pre-locking pin 91. When the nut sleeve 7 moves axially, the locking convex rib presses the pre-locking pin 9 to enable the pre-locking pin 9 to move axially, but the distance for pressing the pre-locking pin 9 is not enough to be inserted into the locking hole 11, in the process of screwing in and screwing out the nut sleeve 7, the locking convex rib 83 crosses the pre-locking pin 91 to realize the positioning of the nut sleeve 7, the locking convex rib 83 is matched with the pre-locking pin 91 to provide a stress point for pushing the nut sleeve 7 to open the supporting legs, in the process of screwing in the nut sleeve 7 for locking, the locking convex rib 83 presses the pre-locking pin 91 to form a forward pushing pressure, and the supporting legs can be ensured to be opened reliably in place; and the locking rib 83 and the pre-lock pin 91 cooperate to provide a shift feeling.

Claims

1. The utility model provides a but variable type walking stick, includes the cane pole of scalable regulation, and cane pole upper end is equipped with the handle, and cane pole lower extreme is equipped with variant supporting mechanism, and variant supporting mechanism includes movable ring, lower fixing base and a plurality of supporting legs subassembly along cane pole circumference evenly distributed, but movable ring endwise slip's cover is located on the cane pole, and lower fixing base is fixed in cane pole bottom, supporting legs subassembly includes supporting leg and connecting rod, its characterized in that: the movable ring is fixedly connected with a manual push-pull sleeve, the manual push-pull sleeve can axially slide along the crutch rod and can be locked on the crutch rod, the supporting leg comprises a connecting arm, one end of the connecting arm is hinged to the movable ring, the other end of the connecting arm extends to form a ground-contact foot arranged at an obtuse angle with the connecting arm, the ground-contact foot is perpendicular to the ground after the supporting leg is unfolded, a rubber pad is arranged on the ground-contact foot, one end of the connecting rod is hinged to the lower fixing seat, and the other end of the connecting rod is hinged to the middle part of the connecting arm of the supporting leg;

the manual push-pull sleeve is provided with an elastic holding sleeve relative to the other end of the end connected with the movable ring, an external thread is arranged outside the elastic holding sleeve, the elastic holding sleeve is provided with a plurality of holding pieces which are arranged along the circumferential direction, a nut sleeve is screwed on the external thread of the elastic holding sleeve, and the nut sleeve is screwed to control the holding pieces of the elastic holding sleeve to hold or loosen the crutch rod; the nut sleeve is a handheld piece of a push-pull driving manual push-pull sleeve, a limiting sleeve extends from the lower end of the nut sleeve, an anti-falling bulge protrudes from a sleeve hole of the limiting sleeve, a stopping convex ring matched with the anti-falling bulge is protruded from the manual push-pull sleeve, and the anti-falling bulge is stopped by the stopping convex ring when the nut sleeve moves to the position where the elastic clasping sleeve looses the crutch rod and does not deviate from the position of the elastic clasping sleeve along one end of the elastic clasping sleeve, so that the nut sleeve is prevented from unscrewing the elastic clasping sleeve;

the hand-operated push-pull sleeve is provided with a pre-locking pin and an unlocking spring, the pre-locking pin is in radial sliding fit on the hand-operated push-pull sleeve along the hand-operated push-pull sleeve, the outer end of the pre-locking pin is a control end corresponding to the sleeve hole of the limiting sleeve, the inner end of the pre-locking pin is a locking end, the unlocking spring provides a reset force for driving the control end of the pre-locking pin to extend into the sleeve hole of the limiting sleeve, the crutch rod is provided with a locking hole corresponding to the position corresponding to the folding state of the driving supporting leg when the hand-operated push-pull sleeve slides to the corresponding position of the folding state of the driving supporting leg and is in corresponding fit with the pre-locking pin, the limiting sleeve is positioned and rotationally matched on the nut sleeve and slides along the axial direction of the nut sleeve, the anti-falling bulge extends along the axial direction and the circumferential direction to form a pre-locking boss, a plurality of pre-locking bosses are uniformly distributed in the sleeve hole of the limiting sleeve along the circumferential direction, the pre-locking bosses are provided with avoiding grooves for containing the control ends of the pre-locking pin to separate from the locking hole along the circumferential direction, the limiting sleeve is provided with a control end of the pre-locking pin in the rotating direction, the control end of the pre-locking pin is located at an unlocking position in the avoidance groove, the control end of the pre-locking pin abuts against a pre-locking position on the pre-locking boss, and the pre-locking boss is provided with an axial locking distance which is used for enabling the nut sleeve to abut against the pre-locking pin when the nut sleeve is screwed into the elastic holding sleeve so as to enable the locking end of the pre-locking pin to be inserted into the locking hole.

2. The transformable crutch of claim 1, wherein: adjacent the groove middle part of dodging between the prelock boss is equipped with the locking protruding muscle, and the nut cover is located and removes elasticity and holds the cover and hold the cane pole position time, and the locking protruding muscle corresponds between prelock and backstop bulge loop and the locking protruding muscle supports and leans on the prelock lateral wall, the protruding height of locking protruding muscle is less than the protruding height of prelock boss roof pressure prelock pin, and the prelock pin has the clearance of beating that does not insert the locking hole, and this clearance of beating provides the locking protruding muscle and follows spacing sleeve axial displacement and push up the prelock pin when crossing the prelock pin and implement to beat and dodge.

3. The transformable crutch of claim 1 or 2 further comprising: the upper end of the anti-falling bulge extends to form a positioning convex rib limited by the rotation limit position of the limiting sleeve, a positioning notch is formed in the stop convex ring, and the positioning convex rib is matched in the positioning notch in a positioning mode and matched with the positioning notch in a stopping mode along the two end faces of the stop convex ring in the circumferential direction.