CN110558691A - Fall-proof assisting walking stick - Google Patents

Abstract

The invention discloses a fall-proof power-assisted walking aid crutch, which comprises a crutch handle, a crutch rod and a four-legged support. The crutch handle is telescopically connected to the upper end of the crutch rod. At the lower end, the crutch bar is provided with a foldable and upside-down auxiliary foot support, the auxiliary foot support is provided with universal rollers, and the crutch bar is provided with a retractable pulley. The present invention is a structural innovation on the basis of the existing crutches. By rotating the crutch rods, one group of foot supports rises along the crutch rods by using the principle of relative motion. The proper height is adjusted to make the two groups of foot supports face each other, and the foot supports are stuck on the stairs. The handrails are locked with butterfly nuts, so that the elderly can push the crutches to help the elderly go upstairs. It only needs a simple operation to help the elderly move forward and provide auxiliary support. The invention has the advantages of exquisite structure, simple operation, convenient installation and reliable working performance, and is suitable for the elderly.

Description

Fall-proof assisting walking stick

technical field

The invention relates to the field of daily necessities, in particular to a fall-proof assisting walking stick.

Background technique

Most elderly people have problems such as heavy legs and feet, weakness, weakness, stiff joints, difficulty in moving, and inability to stand for a long time. When people climb stairs, the weight on their knees will increase by 3 to 4 times in an instant. If a person weighs about 100 catties, when climbing stairs, the knee load can reach 400 catties. With age, the strength of the elderly is greatly reduced, the coordination ability of the body is also declining, and the muscle groups degenerate, so it is even more difficult for the elderly to go up stairs, so the elderly are prone to fall and injury when going upstairs.

For the elderly living in non-elevator rooms, climbing stairs is an unavoidable behavior in daily life. For the elderly living in duplex floors, climbing stairs is even more inevitable. The accidents of falling on the stairs for the elderly There are also quite a few. There have been elderly people who have suffered severe fractures due to weak legs and feet when they step on the empty last step of the stairs. Falling injuries are not small for the elderly, especially causing hip fractures and even death. Therefore, the problem of the elderly going upstairs waiting to be solved.

Contents of the invention

The object of the present invention is to solve the problem of the single function of the existing crutches, and provide a fall-preventing power-assisted walking crutch with the functions of assisting upstairs, walking, and assisting support.

For this reason, the technical solution of the present invention is: a fall-proof power-assisted walker crutch, comprising a crutch handle, a crutch rod and a four-legged support, the crutch handle is connected to the upper end of the crutch rod, and the four-legged support is connected to the lower end of the crutch rod , characterized by:

The crutch handle is telescopically inserted on the upper end of the crutch rod,

The crutch rod on the same side as the crutch handle is provided with a foldable and upside-down auxiliary foot support, and the outer lower end of the auxiliary foot support is provided with a universal roller;

The four-legged support includes a fixed seat and four L-shaped foot supports. A through hole is provided in the middle of the fixed seat. A card slot with an opening extends outward along the through hole on the fixed seat. Inside the card slot is a A groove block with a threaded hole corresponding to the through hole on the fixing base, two of the four foot brackets are fixed on the slots of the fixing base, and the other two foot brackets are fixed on the groove block, four The foot brackets are distributed in a "ten" shape, of which: the two foot brackets fixed on the card slot are of an integrated bending structure, and a vertical upward limit pin is provided on the horizontal section near the side of the card slot; The two foot supports on the groove block adopt a split structure, the horizontal section and the vertical section are connected by a rotating shaft, the vertical section can be flipped 180° along the horizontal section, vertically upward or downward, and the horizontal section is close to the groove block There is a vertically downward limit pin under one side of the bottom, the distance between the limit pin and the bent part of the foot support is the same as the distance between the limit pin of the foot support on the card slot and the bent part of the foot support ;

Extending downward along the through hole on the bottom surface of the fixing seat is a limit block accommodation cavity, the inner wall of the limit block accommodation cavity is provided with an annular slot, and a movable limit block is rotatably connected in the annular slot;

The outer peripheral surface of the lower part of the crutch rod is a threaded structure, and the lower end of the crutch rod passes through the butterfly nut, the groove block, the fixing seat, and is fixed on the movable limit block, wherein: the crutch rod passes between the movable limit block and the annular slot It is a rotational connection, the crutch rod and the fixed seat are rotationally connected, and the crutch rod, the groove block and the butterfly nut are threaded connections;

A pulley that can be stretched up and down is also installed below the cavity of the limiting block. When the pulley is in an extended state and in contact with the ground, the pulley is used in conjunction with the universal roller on the auxiliary foot bracket;

When walking, the pulleys that can be stretched up and down are set to the contracted state, and the auxiliary leg bracket is retracted upwards and fixed on the crutch rod through the hook structure. The slot block is located in the card slot and is tightened and fixed by a butterfly nut. Two split L-shaped structures The vertical section of the foot support is set downwards, and the four foot supports are all in contact with the ground;

When going upstairs to use, unscrew the butterfly nut, move the trough block upwards by turning the crutch rod, turn the vertical sections of the two split foot supports on the trough block upwards 180°, and at the same time turn the trough block to the The two foot supports and the two foot supports on the card slot are arranged in a mirror direction and are tightened by butterfly nuts. When in use, hold the crutch bar with both hands horizontally. Clamping parts are formed from both sides of the stair handrail, and two sets of limit pins opposite to each other on the foot bracket form the support limit part of the upper end surface of the stair handrail;

When walking with crutches, the trough block is in the state of going upstairs, the two foot supports on the trough block and the two foot supports on the card slot are in the mirror position, and the up and down telescopic pulleys are set to the extended state. The pulley is in contact with the ground, the auxiliary foot support is turned downwards and put down, and the crutches are placed obliquely so that the pulleys on both sides of the pulley connecting rod are at the same level as the universal rollers on the auxiliary foot support. Ground contact constitutes the front and rear wheels that push away.

As a preference, the specific installation structure of "the crutch handle can be telescopically inserted on the upper end of the crutch rod" is that the vertical section of the crutch handle is a cylindrical structure, and U-shaped spring pieces are arranged at intervals from top to bottom in the vertical section. , the spring pieces on both sides of the U-shaped spring piece have different lengths, and each spring piece corresponds to a protrusion on the outer side of the short-side spring piece, and a row of through holes corresponding to the protrusions are provided on the crutch handle, and the protrusions protrude from the through hole The crutch rod is provided with a through hole corresponding to the protrusion, the crutch rod above the through hole is provided with an annular pressing piece that can slide up and down, and the protrusion is pressed into the hole, and the crutch rod below the through hole is provided with an annular pressing piece to prevent the ring from pressing. The limit protrusion for the slipping of the sheet.

As preferably, the auxiliary foot support includes a support rod and a foldable pull rod, one end of the support rod is hinged on the crutch rod through the hinge seat one, and the other end is equipped with a universal roller through the universal roller frame, and one end of the pull rod passes through the hinge seat two It is hinged on the crutch rod, and the other end is hinged on the middle part of the support rod. The foldable pull rod consists of two sections, one end of one section and one end of the other section are hinged to form a foldable structure, and hinge seat 1 and hinge seat 2 are fixed on the crutch rod. 1. The second hinged seat is located above the first hinged seat.

As a preference, the specific installation structure of "a pulley that can be retracted up and down is installed under the limit block accommodation cavity" is to include a spring pin mounting seat installed at the bottom of the limit block accommodation cavity, and the spring pin mounting seat has a The spring pin installation cavity, the bottom surface of the spring pin installation cavity extends downwards along the surroundings with a baffle plate, and the lower edge of the baffle plate extends upwards with open slots distributed in the shape of a "ten", in which two opposite open slots The bottom is close to the fixing seat to form a high opening slot, and the bottoms of the other two opposite opening slots are away from the fixing seat to form a low opening slot, and the low opening slot is arranged in the vertical direction of the crutch handle;

A "T" spring pin is installed in the spring pin installation cavity. The spring pin includes a pin rod and a boss on the upper end of the pin rod. A spring is arranged on the outer periphery of the pin rod, and the upper end of the spring abuts against the bottom surface of the spring pin boss. The lower end of the spring abuts against the bottom surface of the spring pin mounting cavity, the lower end of the pin bar passes through the bottom surface of the spring pin mounting cavity and extends downward, the lower end of the spring pin is vertically fixed at the middle position of a pulley connecting rod, the pulley connecting rod a pulley is provided at each end;

Preferably, the pulleys at both ends of the pulley connecting rod are in the shape of an "eight".

Preferably, the back of the handle of the crutch is inclined upwards to provide an auxiliary handle.

Preferably, the bottom of the L-shaped foot support is provided with an anti-skid pad.

Preferably, a plurality of spaced universal balls are provided on the horizontal sections of the four foot supports, and the plurality of universal balls are located on the same straight line as the center line of the upper limit pin of the foot support.

Beneficial effects: the present invention is exquisite in design, reasonable in structure, simple in operation, convenient in installation, reliable in working performance, and realizes multiple functions such as assisting in going upstairs, assisting in walking, assisting in supporting, etc., and is convenient for the elderly to use. The present invention is a structural innovation on the basis of the existing crutches. By rotating the crutch rods, one group of foot supports rises along the crutch rods by using the principle of relative motion. The proper height is adjusted to make the two groups of foot supports face each other, and the foot supports are stuck on the stairs. The handrails are locked with butterfly nuts, so that the elderly can push the crutch rod to help the elderly go upstairs. It only needs a simple operation to help the elderly move forward and provide auxiliary support. The invention has the advantages of exquisite structure, simple operation, convenient installation and reliable working performance, and is suitable for the elderly.

1. The retractable structure between the crutch handle and the crutch rod can quickly pull up and extend the crutch rod, and it is not easy to retract under force. It can be retracted and shortened by sliding up and down, which is convenient for the elderly;

2. The foldable structure of the auxiliary foot support, put down the combination of the universal roller support rod connected to the crutch rod and the foldable pull rod, through the combination of the universal roller and the pulley at the bottom, the function of walking can be realized;

3. The retractable pulley structure is set to connect the pulley connecting rod with a spring pin, and switch by stretching and turning 90 degrees. The high and low positions are purely mechanically designed. The structure is reliable, not easy to damage, and easy to maintain; The pulley at the end is set in an "eight" shape structure, which can prevent the crutches from turning over during the walking aid process;

4. The back of the crutch handle is inclined upwards to set an auxiliary handle, which can facilitate the elderly to hold the crutch in different states;

5. The bottom of the foot support is provided with an anti-skid pad, which increases the friction between the crutch foot and the ground, and can move forward safely;

6. There are multiple spaced universal balls on the horizontal section of the foot bracket. When the foot bracket is stuck on the stair handrail and pushed forward, the universal ball can roll flexibly to facilitate upward push. During the assisting process, the universal ball changes the contact Direction, it can be stuck on the handrail of the stairs, so as to realize the function of assisting the stairs; setting the limit pin not only constitutes the support limit part of the upper end surface of the handrail of the stairs, but also prevents the crutch from turning over during the assisting process.

Description of drawings

Fig. 1 is a structural diagram of the present invention when walking assist is used.

Fig. 2 is a structural diagram of the present invention when being promoted and used.

Fig. 3 is a structural diagram of the present invention when it is used upstairs.

Fig. 4 is a state diagram one of the present invention in the process of being adjusted to use the structure upstairs.

Fig. 5 is the second state diagram of the present invention in the process of adjusting the structure for going upstairs.

Fig. 6 is a half-sectional view of the present invention when the structure is used upstairs and the auxiliary foot support is put down.

Fig. 7 is an enlarged view of the retractable structure between the A-crutch handle and the crutch shaft in Fig. 6 .

FIG. 8 is an enlarged perspective view of the B-assisted foot bracket in FIG. 6 .

Fig. 9 is an enlarged view of the stair handrail clamping structure formed by C- in Fig. 6 .

Fig. 10 is a partially enlarged view of the ring-shaped tablet of the present invention.

Fig. 11 is a half-section front view of the present invention when walking assist is used.

Fig. 12 is a view along A-A in Fig. 11 .

FIG. 13 is an enlarged view of D in FIG. 11 .

Fig. 14 is a structural diagram of the auxiliary foot support of the present invention being fixed on the crutch rod after being folded.

FIG. 15 is an enlarged view of E in FIG. 14 .

As shown in the figure: 1. Cane handle; 2. Cane rod; 3. Four-legged bracket; 4. U-shaped spring piece; 5. Protrusion; 6. Through hole; 7. Through hole two; , limit protrusion; 10, support rod; 11, foldable pull rod; 12, hinged seat one; 13, universal roller; 14, hinged seat two; 15, fixed seat; 16, foot bracket; 16-1, fixed Two foot supports on the card slot; 16-2, two foot supports fixed on the slot block; 17, card slot; 18, slot block; 19-1, limit pin one; 19-2, limit Pin two; 20, spring pin mounting seat; 21, movable limit block; 22, opening slot; 22-1, high opening slot; 22-2, low opening slot; 23, spring pin; 24, spring; 25, pulley Connecting rod; 26, pulley; 27, butterfly nut; 28, auxiliary handle; 29, anti-skid pad; 30, universal ball; 31, hook; 32, hanging ear.

Detailed ways

The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings, but this embodiment should not be construed as limiting the present invention.

The present invention is shown in Figure 1 to Figure 15:

A fall-proof assisting walking stick, comprising a crutch handle 1, a crutch rod 2 and a four-legged support 3, the crutch handle 1 is telescopically inserted on the upper end of the crutch rod 2, and the four-legged support 3 is divided into two groups and connected to the crutches respectively The lower end of the rod 2; the specific structure of "the crutch handle can be telescopically inserted on the upper end of the crutch rod" is that the vertical section of the crutch handle 1 is a cylindrical structure, and U-shaped Spring piece 4, the length of the spring piece on both sides of U-shaped spring piece 5 is different, each spring piece is provided with protrusion 5 on the outside of the corresponding short side spring piece, and the crutch handle is provided with a row of through holes 6 corresponding to the protrusion, and the protrusion 5 Stretch out from this through hole, be provided with a through hole 7 corresponding to this protrusion on the crutch bar 2, be provided with an annular pressure piece 8 that can slide up and down on the crutch bar above the through hole 2, the protrusion is pressed into the hole , the crutch bar below the through hole is provided with the limit protrusion 9 that prevents the annular pressing piece from slipping, and is used to prevent the annular pressing piece from sliding down.

The crutch rod 2 located on the same side of the crutch handle 1 is provided with a foldable and upside-down auxiliary foot support H. The auxiliary foot support includes a support rod 10 and a foldable pull rod 11. One end of the support rod 10 is hinged on the crutch through a hinge seat 12. On the rod, the other end is equipped with a universal roller 13 through a universal roller frame, and one end of the foldable pull rod 11 is hinged on the crutch rod through the hinge seat 2 14, and the other end is hinged on the middle part of the support rod. The foldable pull rod 11 includes two One end of one section and one end of the other section are hinged to each other to form a foldable structure, and hinge seat one 12 and hinge seat two 14 are fixed on the crutch bar, and hinge seat two is positioned at the top of hinge seat one; the side of the support bar is also fixed with A hook 31 at one end is used to assist the foot support to be folded and fixed on the crutch rod after being folded away, and the corresponding position on the crutch rod is provided with a hanging ear 32;

Described quadripod support 3 comprises fixing base 15, the foot bracket 16 of four L-shaped structures, and the center of fixing base is provided with through hole, is provided with the draw-in groove 17 with opening along the outward extension of through hole on the fixing base, and clamps A groove block 18 with a threaded hole corresponding to the through hole on the fixed seat is provided in the groove. When the groove block is placed in the groove, the height of the groove block is consistent with the upper surface of the groove. Two of the four foot supports One foot support is fixed on the draw-in slot 17 of the fixed seat, and the other two foot supports are fixed on the groove block 18, and the four foot supports are distributed in a "ten" shape, wherein: two foot supports 16 fixed on the draw-in slot -1 Integral bending structure, a vertically upward limit pin 19-1 is provided on the horizontal section close to the side of the card slot; the two foot supports 16-2 fixed on the slot block adopt a split structure, The horizontal section and the vertical section are connected by a rotating shaft. The vertical section can be turned 180° along the horizontal section, vertically upwards or downwards. There is a vertical downward limit on the side of the horizontal section close to the groove block. Pin two 19-2, the distance between the limit pin and the bent part of the foot support is the same as the distance between the limit pin of the foot support on the card slot and the bend of the foot support;

The bottom surface of the fixed seat is connected with the spring pin mounting seat 20, and a limit block accommodation cavity is provided between the bottom surface of the fixed seat and the upper end surface of the spring pin mounting seat. A movable limit block 21 is connected in the draw-in groove; a spring pin installation cavity is provided in the spring pin mounting seat, and the bottom surface of the spring pin installation cavity extends downwards along the surroundings to be provided with a baffle, and the lower edge of the baffle extends upwards to be provided with a " Ten"-shaped opening slots 22, wherein the bottoms of two opposite opening slots are close to the fixing seat to form a high opening slot 22-1, and the bottoms of the other two opposite opening slots are far away from the fixing seat to form a low opening slot 22-1 2. The low opening slot is set in the vertical direction of the surface where the crutch handle is located;

There is a "T" type spring pin 23 installed in the spring pin installation cavity, the spring pin 23 includes a pin rod and a boss located at the upper end of the pin rod, a spring 24 is arranged on the outer periphery of the pin rod, and the upper end of the spring abuts against the boss of the spring pin On the bottom surface, the lower end of the spring abuts against the bottom surface of the spring pin installation cavity, the lower end of the pin bar passes through the bottom surface of the spring pin installation cavity and extends downward, and the lower end of the spring pin is vertically fixed to the middle position of a pulley connecting rod 25, The two ends of the pulley connecting rod are respectively provided with a pulley 26, and the pulleys at the two ends are arranged in an "eight" shape structure to prevent rollover;

The lower outer peripheral surface of the crutch rod 2 is a threaded structure, and the lower end of the crutch rod passes through the butterfly nut 27, the groove block 18, the fixing seat 15, and is fixed on the movable limiting block 21, wherein: the crutch rod 2 passes through the movable limiter. There is a rotational connection between the block 21 and the annular slot, a rotational connection between the crutch rod 2 and the fixed seat 15, and a threaded connection between the crutch rod 2 and the groove block 18 and the butterfly nut 27;

The back of the crutch handle 1 is inclined upward and is also provided with an auxiliary handle 28, which is convenient for the elderly to hold when the crutch is in different states of use.

The bottom of the foot bracket of the L-shaped structure is also provided with an anti-skid pad 29, which increases the friction between the crutch foot and the ground, and can move forward safely.

The horizontal sections of the four foot supports are also provided with a plurality of spaced universal balls 30, and the center line of the plurality of universal balls and the upper limit pin 19 of the foot support is located on the same straight line. When the stair handrail is pushed forward, the universal ball can roll flexibly to facilitate upward push. During the assisting process, the universal ball can be stuck on the stair handrail by changing the contact direction, so as to realize the function of assisting the stairs.

Working principle of the present invention:

When walking (auxiliary support), the pulley connecting rod is placed in the high-position opening groove, the pulley is off the ground, the auxiliary foot bracket is retracted upwards and fixed on the crutch rod, the groove block is located in the card slot and fixed by butterfly nuts, two points The vertical section of the foot support of the L-shaped structure is set downwards, and the four foot supports are all in contact with the ground, and the height of the crutch handle can be used as needed;

When going upstairs to use, loosen the butterfly nut first, move the trough block upwards through relative motion by turning the crutch rod, turn the vertical sections of the two split foot supports on the trough block upwards 180°, and at the same time turn the trough block to The two foot brackets on the slot block are arranged opposite to the two foot brackets on the card slot on the same side and tightened by butterfly nuts. When in use, hold the crutch rod with both hands horizontally. The cavity between the two sets of foot brackets constitutes the embedding cavity of the stair handrail. Two sets of foot brackets form the clamping part from both sides of the stair handrail, and the two sets of limit pins on the foot bracket opposite to each other form the support limit part of the upper end surface of the stair handrail, which can also prevent the crutch from turning over during the assisting process;

When walking with crutches (walking aid), the trough block is in the state of going upstairs, the two foot supports on the trough block and the two foot supports on the card slot are in the mirror arrangement position, and the pulley connecting rod is pulled down After stretching, rotate 90° and place it in the lower opening slot, so that the pulleys on both sides of the pulley connecting rod touch the ground, and the auxiliary foot support is in the state of being lowered, place the crutches obliquely, so that the pulley connecting rod and the auxiliary foot support form a stable "triangle" structure, and make the pulleys on both sides of the pulley connecting rod and the universal roller on the auxiliary foot bracket be at the same level. The pulleys at the bottom cooperate with each other to realize the function of assisting walking, and at the same time adjust the length of the retractable crutch handle to facilitate implementation.

What is not described in detail in this specification is a well-known technology in the art.

Through the description of the above-mentioned processing method, those skilled in the art should understand that the present invention is not limited to the above-mentioned specific embodiments, and on the basis of the present invention, improvements and substitutions using technologies known in the art all fall within the protection scope of the present invention. It shall be defined by the claims.

Claims (8)

1. A fall-proof assisting walking stick, comprising a crutch handle, a crutch bar and a four-legged support, the crutch handle is connected to the upper end of the crutch bar, and the four-legged support is connected to the lower end of the crutch bar, characterized in that: The crutch handle is telescopically inserted on the upper end of the crutch rod, The crutch rod on the same side as the crutch handle is provided with a foldable and upside-down auxiliary foot support, and the outer lower end of the auxiliary foot support is provided with a universal roller; The four-legged support includes a fixed seat and four L-shaped foot supports. A through hole is provided in the middle of the fixed seat. A card slot with an opening extends outward along the through hole on the fixed seat. Inside the card slot is a A groove block with a threaded hole corresponding to the through hole on the fixing base, two of the four foot brackets are fixed on the slots of the fixing base, and the other two foot brackets are fixed on the groove block, four The foot brackets are distributed in a "ten" shape, of which: the two foot brackets fixed on the card slot are of an integrated bending structure, and a vertical upward limit pin is provided on the horizontal section near the side of the card slot; The two foot supports on the groove block adopt a split structure, the horizontal section and the vertical section are connected by a rotating shaft, the vertical section can be flipped 180° along the horizontal section, vertically upward or downward, and the horizontal section is close to the groove block There is a vertically downward limit pin under one side of the bottom, the distance between the limit pin and the bent part of the foot support is the same as the distance between the limit pin of the foot support on the card slot and the bent part of the foot support ; Extending downward along the through hole on the bottom surface of the fixing seat is a limit block accommodation cavity, the inner wall of the limit block accommodation cavity is provided with an annular slot, and a movable limit block is rotatably connected in the annular slot; The outer peripheral surface of the lower part of the crutch rod is a threaded structure, and the lower end of the crutch rod passes through the butterfly nut, the groove block, the fixing seat, and is fixed on the movable limit block, wherein: the crutch rod passes between the movable limit block and the annular slot It is a rotational connection, the crutch rod and the fixed seat are rotationally connected, and the crutch rod, the groove block and the butterfly nut are threaded connections; A pulley that can be stretched up and down is also installed below the cavity of the limiting block. When the pulley is in an extended state and in contact with the ground, the pulley is used in conjunction with the universal roller on the auxiliary foot bracket; When walking, the pulleys that can be stretched up and down are set to the contracted state, and the auxiliary leg bracket is retracted upwards and fixed on the crutch rod through the hook structure. The slot block is located in the card slot and is tightened and fixed by a butterfly nut. Two split L-shaped structures The vertical section of the foot support is set downwards, and the four foot supports are all in contact with the ground; When going upstairs to use, unscrew the butterfly nut, move the trough block upwards by turning the crutch rod, turn the vertical sections of the two split foot supports on the trough block upwards 180°, and at the same time turn the trough block to the The two foot supports and the two foot supports on the card slot are arranged in a mirror direction and are tightened by butterfly nuts. When in use, hold the crutch bar with both hands horizontally. Clamping parts are formed from both sides of the stair handrail, and two sets of limit pins opposite to each other on the foot bracket form the support limit part of the upper end surface of the stair handrail; When walking with crutches, the trough block is in the state of going upstairs, the two foot supports on the trough block and the two foot supports on the card slot are in the mirror position, and the up and down telescopic pulleys are set to the extended state. The pulley is in contact with the ground, the auxiliary foot support is turned downwards and put down, and the crutches are placed obliquely so that the pulleys on both sides of the pulley connecting rod are at the same level as the universal rollers on the auxiliary foot support. Ground contact constitutes the front and rear wheels that push away. 2. According to claim 1, an anti-falling walking aid crutch is characterized in that: the specific installation structure of "the handle of the crutch can be telescopically inserted on the upper end of the crutch rod" is that the vertical section of the handle of the crutch It is a cylindrical structure, and there are U-shaped spring pieces at intervals from top to bottom in the vertical section. The lengths of the spring pieces on both sides of the U-shaped spring piece are different. The handle is provided with a row of through holes corresponding to the protrusions, and the protrusions protrude from the through holes. The crutch rod is provided with a through hole corresponding to the protrusions. The annular pressing piece in the hole is inserted, and the crutch rod below the through hole is provided with a limit protrusion to prevent the annular pressing piece from slipping. 3. According to claim 1, a kind of anti-fall power-assisted walker crutch is characterized in that: said auxiliary foot support includes a support rod and a foldable pull rod, and one end of the support rod is hinged on the crutch rod through a hinge seat, The other end is equipped with a universal roller through the universal roller frame. One end of the pull rod is hinged on the crutch rod through the hinge seat 2, and the other end is hinged on the middle part of the support rod. The foldable pull rod includes two sections, one end of one section and the other section. One ends are hinged to each other to form a foldable structure, the hinged seat 1 and the hinged seat 2 are fixed on the crutch rod, and the hinged seat 2 is located above the hinged seat 1. 4. According to claim 1, a fall-preventing power-assisted walker crutch is characterized in that: the specific installation structure of the "up and down retractable pulley is installed under the spacer accommodating chamber" is as follows: The spring pin mounting seat at the bottom of the limit block accommodation cavity has a spring pin mounting cavity in the spring pin mounting cavity. Open slots distributed in a "ten" shape, wherein the bottoms of two opposite open slots are close to the fixed seat to form a high open slot, and the bottoms of the other two opposite open slots are far away from the fixed seat to form a low open slot. Located in the vertical direction of the crutch handle; A "T" spring pin is installed in the spring pin installation cavity. The spring pin includes a pin rod and a boss on the upper end of the pin rod. A spring is arranged on the outer periphery of the pin rod, and the upper end of the spring abuts against the bottom surface of the spring pin boss. The lower end of the spring abuts against the bottom surface of the spring pin mounting cavity, the lower end of the pin bar passes through the bottom surface of the spring pin mounting cavity and extends downward, the lower end of the spring pin is vertically fixed at the middle position of a pulley connecting rod, the pulley connecting rod Each end is provided with a pulley. 5 . The anti-fall walking stick according to claim 4 , wherein the pulleys at the two ends of the pulley connecting rod are in the shape of “eight”. 6 . The anti-fall walking stick according to claim 1 , 2 , 3 , 4 , or 5 , characterized in that: the back of the handle of the crutch is inclined upward and provided with an auxiliary handle. 7 . The fall-preventing walking aid crutch according to claim 6 , wherein the bottom of the L-shaped foot support is provided with a non-slip pad. 7 . 8. According to claim 7, a kind of anti-falling power-assisted walking crutch is characterized in that: the horizontal sections of the four foot supports are provided with a plurality of spaced universal balls, and the plurality of universal balls are connected with The center line of the upper limit pin of the foot support is located on the same straight line.