Self-adaptive walking stick / wheelchair switching device

Abstract

The invention relates to a self-adaptive crutch / wheelchair conversion device. The self-adaptive crutch / wheelchair conversion device comprises a pair of crutches which can be mutually converted in a crutch form and a wheelchair form. Each walking stick comprises a walking stick body, each walking stick body comprises a center bottom column and a supporting frame, a foldable seat plate and a foldable wheelchair supporting rod are arranged on each walking stick body, and rolling wheels are arranged at the top ends of the wheelchair supporting rods. In the crutch form, the seat plate, the backrest and the wheelchair supporting rod are all in a storage state, and the crutch is in direct contact with the ground; in the wheelchair state, the seat plates are adjusted to be in the using state through the spring pull pins, the two seat plates are fixedly connected through the locking pieces and the locking matching pieces, the backrests are connected with the corresponding backrest matching pieces in a matched mode, and the wheelchair supporting rods are folded downwards through the spring pull pins till the idler wheels make direct contact with the ground. Compared with the prior art, the wheelchair type walking stick can be easily switched between a walking stick form and a wheelchair form so as to meet daily action and rehabilitation training of a patient with a single lower limb.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary equipment, in particular to an adaptive crutch / wheelchair conversion device. Background Art

[0002] For patients with lower limb fractures, such as femoral neck fracture, femoral shaft fracture, tibia and fibula shaft fracture, ankle fracture, etc., crutches are important auxiliary tools during the rehabilitation period. They can help patients stand and walk without putting their weight on the injured leg, knee or ankle, reduce the burden on the affected limb, provide additional support and stability, prevent falls, and promote recovery.

[0003] Although traditional crutches are easy to carry, they cannot provide long-term support. When going out or walking long distances, patients with single limb fractures often need to use wheelchairs. For patients who cannot bear weight or walk safely due to pain, physical weakness, etc., wheelchairs are more suitable auxiliary tools. They can provide convenience and independence of movement, while reducing pressure on the injured part and avoiding secondary injuries caused by improper walking.

[0004] However, the cost of purchasing both a wheelchair and crutches is relatively high, so some patients only choose to buy one. In addition, it is inconvenient for patients to carry crutches while sitting in a wheelchair. Therefore, it is urgent to develop a new type of auxiliary device for fracture patients that can adaptively and quickly transform crutches into wheelchairs to meet the various needs of fracture patients when going out. Summary of the invention

[0005] The purpose of the present invention is to provide an adaptive crutch / wheelchair conversion device to overcome the defect that the existing wheelchair and crutches are difficult to combine, so as to meet the various needs of fracture patients for going out.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The present invention provides an adaptive crutch / wheelchair conversion device, comprising a pair of crutches that can be converted into a crutch form and a wheelchair form; the crutch comprises a crutch body, the crutch body comprises a central bottom column that can directly contact the ground and support frames respectively arranged on both sides of the central bottom column; the crutch body is provided with a foldable seat plate and a foldable wheelchair support rod, and the top of the wheelchair support rod is provided with a roller that can move on the bottom surface;

[0008] A locking piece is provided at the bottom of the seat plate of one of the crutches, and a locking fitting piece capable of being fixed with the locking piece is provided at the bottom of the seat plate of the other crutch; a stretchable backrest is provided on the crutch body of one of the crutches, and a backrest fitting piece for fixing the backrest is provided on the crutch body of the other crutch;

[0009] The support frame is provided with a first rotating mounting seat, and the central bottom column is provided with a second rotating mounting seat; the seat plate and the support rod are both connected with spring pull pins, wherein the seat plate can be fixed with the first rotating mounting seat through the spring pull pin, and the support rod can be fixed with the second rotating mounting seat through the spring pull pin;

[0010] In the crutch form, the seat plate, the backrest and the upwardly folded wheelchair support rod are all in a stowed state, and the bottom of the crutch is in direct contact with the ground;

[0011] In the wheelchair form, the seat plate is adjusted to the use state by a spring pull pin and the two seat plates are connected and fixed by a locking piece and a locking mating piece. The backrest is connected with the corresponding backrest mating piece, and the wheelchair support rod is folded downward by a spring pull pin until the roller is in direct contact with the ground.

[0012] Furthermore, a crossbeam is connected to the top of the support frame, and a grip rod is connected to the middle of the support frame.

[0013] Furthermore, a non-slip support pad is provided at the bottom of the central bottom column.

[0014] Furthermore, an armpit pad is installed on the crossbeam, and the armpit pad is provided with a curved surface that fits the armpit.

[0015] Furthermore, the two support frames of the crutch body are each provided with a first rotating mounting seat, and the first rotating mounting seat is each provided with a first main hole and at least two first adjustment holes.

[0016] Furthermore, the seat plate comprises a seat plate support plate and a seat cushion, wherein a rotating connecting plate is provided at the end of the seat plate support plate.

[0017] Furthermore, the rotatable connecting plate is rotated by a first rotating shaft cooperating with the first main hole axes on both sides, and the rotatable connecting plate is connected to the first adjustment hole through a spring pull pin to adjust the seat plate to switch between the storage state and the use state.

[0018] Furthermore, the locking member includes a central knob and a semicircular ring, and the central knob and the semicircular ring are connected by a connecting rod.

[0019] Furthermore, the locking fitting comprises an annular positioning piece arranged at the bottom of the seat plate and an arc-shaped slot arranged cocentrically with the annular positioning piece, and the semicircular ring of the locking piece can cooperate with the arc-shaped slot to achieve locking under the rotation of the center knob.

[0020] Furthermore, the second rotating mounting seat is centrally symmetrically arranged at the same horizontal height of the central base column, and each of the second rotating mounting seats is provided with a second main hole and a plurality of second adjustment holes.

[0021] Furthermore, the wheelchair support rod is rotated by a second rotating shaft that passes through the end of the wheelchair support rod and cooperates with the second main holes on both sides. The wheelchair support rod can be switched between the storage state and the use state through the cooperation connection of the spring pull pin and the second adjustment hole.

[0022] Furthermore, the backrest comprises a stretchable supporting cloth and a storage groove provided on the supporting frame for curling and storing the stretchable supporting cloth.

[0023] Furthermore, a clamping column is provided at the stretching end of the stretchable supporting cloth, and a clamping groove capable of being clamped and matched with the clamping column is provided at the backrest matching piece.

[0024] Furthermore, a foldable foot pedal is provided on the wheelchair support rod at one end close to the roller.

[0025] Furthermore, the spring pull pin includes a pull rod, a hollow bolt and a spring.

[0026] Furthermore, the pulling rod comprises a pin rod, a pulling portion provided at one end of the pin rod and a limiting portion provided at the other end of the pin rod, and the hollow bolt is sleeved between the pulling portion and the limiting portion.

[0027] Furthermore, the spring is sleeved between the hollow bolt and the limiting portion, and two ends of the spring are respectively in contact with the hollow bolt and the limiting portion.

[0028] Furthermore, the limiting portion of the spring pull pin can be inserted into the first rotating mounting seat or the second rotating mounting seat and fixed in position.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) The adaptive crutch / wheelchair conversion device of the present invention cleverly combines a crutch and a wheelchair, and can be easily switched between crutch form and wheelchair form to meet the needs of daily movement and rehabilitation training for patients with monolimb lower limb.

[0031] (2) The present invention adopts a simple manual assembly. Through the cooperation between the locking member and the locking matching member, the cooperation between the spring pull pin and the rotating mounting seat, etc., the two crutches can be quickly assembled. The operation is simple and can be completed quickly by one person.

[0032] (3) The adaptive crutch / wheelchair conversion device of the present invention has a compact structure in the crutch form, which is convenient for patients to carry when going out, and has a stable structure in the wheelchair form. The crutch itself can be used as a natural armrest and push handle, which greatly simplifies the complex structure of other wheelchairs.

[0033] (4) The adaptive crutch / wheelchair conversion device of the present invention can meet the special activities of fracture patients who need to stand or walk for a long time, such as traveling, exhibitions, conferences, etc., and provide walking and rest support for patients in these occasions. It is suitable for the mobility needs of various scenarios such as daily life, home care and public places. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic structural diagram of the adaptive crutch / wheelchair conversion device of the present invention in the wheelchair form.

[0035] Figure 2 The figure is a schematic structural diagram of the adaptive crutch / wheelchair conversion device of the present invention in the crutch form.

[0036] Figure 3 This is a schematic structural diagram of a crutch main body according to Embodiment 2 of the present invention.

[0037] Figure 4 This is a schematic structural diagram of the first rotating mounting seat of Example 3 of the present invention.

[0038] Figure 5 This is a schematic structural diagram of the second rotating mounting base of Example 3 of the present invention.

[0039] Figure 6 This is a schematic structural diagram of a spring pull pin according to Embodiment 4 of the present invention.

[0040] Figure 7 This is an exploded view of the spring pull pin of Example 4 of the present invention.

[0041] Figure 8 Schematic diagram of the structure of the locking member and the locking matching member of Example 5 of the present invention.

[0042] Fig. 9 This is a diagram of the matching relationship between the locking piece and the locking matching piece of Example 5 of the present invention.

[0043] Fig.10 It is a schematic structural diagram of a backrest and a backrest matching component according to Embodiment 6 of the present invention.

[0044] Fig.11 This is a diagram showing the matching relationship between the clamping column and the clamping groove of Example 6 of the present invention.

[0045] Description of the markings in the figure:

[0046] 1-crutch body, 11-central bottom column, 12-support frame, 13-crossbeam, 14-grip rod, 15-anti-slip support pad, 16-axillary pad, 17-first rotating mounting seat, 171-first main hole, 172-first adjustment hole, 173-first rotating shaft, 18-second rotating mounting seat, 181-second main hole, 182-second adjustment hole, 183-second rotating shaft;

[0047] 2-seat plate, 21-seat plate support plate, 22-seat cushion, 23-rotating connecting plate;

[0048] 3-wheelchair support rod, 31-foot pedal;

[0049] 4-Roller;

[0050] 5-locking piece, 51-center knob, 52-semicircle ring, 53-connecting rod;

[0051] 6-locking fitting, 61-annular positioning piece, 62-arc-shaped slot;

[0052] 7-backrest, 71-stretchable support cloth, 72-storage slot, 73-clamping column;

[0053] 8-backrest matching piece, 81-clip groove;

[0054] 9-spring pull pin, 91-pull rod, 911-pin rod, 912-pull portion, 913-limiting portion, 92-hollow bolt, 93-spring. DETAILED DESCRIPTION

[0055] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0056] In the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0058] Embodiment 1:

[0059] The present embodiment provides an adaptive crutch / wheelchair conversion device, comprising a pair of crutches that can be converted into a crutch form and a wheelchair form. The crutch comprises a crutch body 1, the crutch body 1 comprises a central bottom column 11 that can directly contact the ground and support frames 12 respectively arranged on both sides of the central bottom column 11. The crutch body 1 is provided with a foldable seat plate 2 and a foldable wheelchair support rod 3, and the top of the wheelchair support rod 3 is provided with a roller 4 that can move on the bottom surface.

[0060] A locking piece 5 is provided at the bottom of the seat plate 2 of one crutch, and a locking fitting piece 6 which can be fixed with the locking piece 5 is provided at the bottom of the seat plate 2 of the other crutch. A stretchable backrest 7 is provided on the crutch body 1 of one crutch, and a backrest fitting piece 8 for fixing the backrest 7 is provided on the crutch body 1 of the other crutch.

[0061] The support frame 12 is provided with a first rotating mounting seat 17, and the central bottom column 11 is provided with a second rotating mounting seat 18. The seat plate 2 and the support rod 3 are both connected with a spring pull pin 9, wherein the seat plate 2 can be fixed with the first rotating mounting seat 17 through the spring pull pin 9, and the support rod 3 can be fixed with the second rotating mounting seat 18 through the spring pull pin 9.

[0062] like Figure 1-2 As shown, in the crutch form, the seat plate 2, the backrest 7 and the wheelchair support rod 3 folded upward are all in the storage state, and the bottom of the crutch is in direct contact with the ground. In the wheelchair form, the seat plate 2 is adjusted to the use state by the spring pin 9 and the two seat plates 2 are connected and fixed by the locking member 5 and the locking fitting member 6, the backrest 7 is connected with the corresponding backrest fitting member 8, and the wheelchair support rod 3 is folded downward by the spring pin 9 until the roller 4 is in direct contact with the ground.

[0063] Embodiment 2:

[0064] The present embodiment provides an adaptive crutch / wheelchair conversion device, comprising a pair of crutches that can be converted between a crutch form and a wheelchair form.

[0065] The difference from Example 1 is that Figure 3As shown, the top of the support frame 12 of this embodiment is connected with a crossbeam 13, and an axillary pad 16 is installed on the crossbeam 13. The axillary pad 16 is provided with an arc surface that fits the armpit, so that the armpit can effectively support the weight of the upper body on the axillary pad 16 of the crossbeam 13 when the patient relies on the crutches to move forward. The middle part of the support frame 12 is connected with a grip bar 14, which is convenient for the patient to hold the grip bar 14 to form an effective support. The bottom of the central bottom column 11 is provided with an anti-skid support pad 15, and the size of the anti-skid support pad 15 is larger than the bottom of the central bottom column 11, so that the crutch can form an effective support when it is in direct contact with the ground, and increase the friction between the ground and the ground, which is convenient for the patient to move forward. The main structure of the crutch of this embodiment is made of lightweight high-strength aluminum alloy material.

[0066] The wheelchair support rod 3 of the present embodiment is provided with a foldable footrest 31 at one end close to the roller 4, so as to place and support the patient's feet in the wheelchair form.

[0067] Embodiment 3:

[0068] The present embodiment provides an adaptive crutch / wheelchair conversion device, comprising a pair of crutches that can be converted between a crutch form and a wheelchair form.

[0069] The difference from Example 1 is that Figure 4 As shown, the two support frames 12 of the crutch body 1 of this embodiment are each provided with a first rotating mounting seat 17, and each of the first rotating mounting seats 17 is provided with a first main hole 171 and at least two first adjustment holes 172. The seat plate 2 includes a seat plate support plate 21 and a seat cushion 22, wherein a rotating connecting plate 23 is provided at the end of the seat plate support plate 21. The rotating connecting plate 23 is rotated by a first rotating shaft 173 that cooperates with the hole axes of the first main holes 171 on both sides, and the rotating connecting plate 23 is connected with the first adjustment hole 172 through a spring pull pin 9 to adjust the seat plate 2 to switch between the storage state and the use state.

[0070] like Figure 5 As shown, the second rotating mounting seat 18 of this embodiment is centrally symmetrically arranged at the same horizontal height of the central base column 11, and each of the second rotating mounting seats 18 is provided with a second main hole 181 and a plurality of second adjustment holes 182. The wheelchair support rod 3 is rotated by a second rotating shaft 183 that penetrates the end of the wheelchair support rod 3 and cooperates with the second main holes 181 on both sides. The wheelchair support rod 3 can be switched between the storage state and the use state by the cooperation connection between the spring pull pin 9 and the second adjustment hole 182.

[0071] Embodiment 4:

[0072] The present embodiment provides an adaptive crutch / wheelchair conversion device, comprising a pair of crutches that can be converted between a crutch form and a wheelchair form.

[0073] The difference from Example 3 is that Figure 6-7 As shown, the spring pin 9 of this embodiment includes a drawing rod 91, a hollow bolt 92 and a spring 93. The drawing rod 91 includes a pin 911, a drawing portion 912 provided at one end of the pin 911 and a limiting portion 913 provided at the other end of the pin 911, and the hollow bolt 92 is sleeved between the drawing portion 912 and the limiting portion 913. The spring 93 is sleeved between the hollow bolt 92 and the limiting portion 913, and the two ends of the spring 93 are respectively in contact with the hollow bolt 92 and the limiting portion 913. The limiting portion 913 of the spring pin 9 can be inserted into the first rotating mounting seat 17 or the second rotating mounting seat 18 and fixed in position. The first rotating shaft 173 and the second rotating shaft 183 are both connected to a transition plate on the side close to the spring pin 9, and the transition plate is provided with an internal thread that can be threadedly matched with the hollow bolt 92.

[0074] Taking the second rotating mounting seat 18 as an example, the wheelchair support rod 3 in the storage state is locked in the second adjustment hole 182 near the upper end by the spring pull pin 9, and the entire wheelchair support rod 3 is in an upward folded state. When it is necessary to transform the present embodiment from a crutch form to a wheelchair form, it is necessary to transform the wheelchair support rod 3 from the upward folded storage state to a ground-supported use state. At this time, the pulling portion 912 of the pull rod 91 is grasped and stretched outward, and the limiting portion 913 is pressed outward by the spring 93 until it is pulled out of the second adjustment hole 182, and the locking contact is made, and the wheelchair support rod 3 can be rotated and folded downward. When the wheelchair support rod 3 is sufficiently in contact with the ground and the central bottom column 11 is not in contact with the ground, the limiting portion 913 of the pull rod 91 is inserted into the second adjustment hole 182 at the corresponding position again, and the locking is formed again. The other three wheelchair support rods 3 are operated in the same way, and the adaptive crutch / wheelchair conversion device of the present embodiment can be successfully transformed from the crutch form to the wheelchair form.

[0075] The operation of the first rotating mounting seat 17 and the spring pull pin 9 is similar to that of adjusting the seat plate 2 in the storage state to a horizontal state, which will not be described in detail here.

[0076] Embodiment 5:

[0077] An adaptive crutch / wheelchair conversion device comprises a pair of crutches which can be converted into a crutch form and a wheelchair form.

[0078] The difference from the first embodiment is that in order to realize the smooth splicing of the two seat plates 2 in the wheelchair form, the structures of the locking member 5 and the locking matching member 6 are specifically designed. Figure 8-9 As shown, the locking member 5 of this embodiment includes a central knob 51 and a semicircular ring 52. The central knob 51 and the semicircular ring 52 are connected by a connecting rod 53. The connecting rod 53 is connected to a position near the end of the semicircular ring 52. The central knob 51 is perpendicular to the seat plate 2.

[0079] The locking fitting 6 includes an annular positioning piece 61 disposed at the bottom of the seat plate 2 and an arcuate slot 62 disposed coaxially with the annular positioning piece 61 . The semicircular ring 52 of the locking piece 5 can cooperate with the arcuate slot 62 to achieve locking when the center knob 51 is rotated.

[0080] When the seat plates 2 of the two crutches are adjusted to be horizontal by the spring pull pin 9, the center knob 51 of one seat plate 2 is positioned and spliced ​​with the annular positioning piece 61 of the other seat plate 2, and then the center knob 51 is rotated to make the connecting rod 53 drive the semicircular ring 52 to be clamped into the arc groove 62 of the locking fitting 6, so as to realize the smooth splicing and fixation of the two seat plates 2.

[0081] Embodiment 6:

[0082] An adaptive crutch / wheelchair conversion device comprises a pair of crutches which can be converted into a crutch form and a wheelchair form.

[0083] The difference from Example 1 is that Figure 10-11 As shown, the backrest 7 of this embodiment includes a stretchable support cloth 71 and a storage groove 72 provided on the support frame 12 for curling and storing the stretchable support cloth 71. A clamping column 73 is provided at the stretching end of the stretchable support cloth 71, and the backrest matching piece 8 is provided with a clamping groove 81 that can be clamped and matched with the clamping column 73, and the clamping groove 81 is provided with a through opening gap along the length direction. A spiral spring connected to the stretchable support cloth 71 is provided in the storage groove 72, and the stretching and resetting of the stretchable support cloth 71 is realized in a form similar to a tape measure. When in use, the clamping column 73 is pulled close to the backrest matching piece 8, and the clamping column 73 is clamped into the clamping groove 81 from the upper end of the clamping groove 81, so that a temporary backrest 7 can be formed for the patient to lean on.

[0084] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. An adaptive crutch / wheelchair conversion device, characterized in that: The invention comprises a pair of crutches which can be transformed into a crutch form and a wheelchair form; the crutch comprises a crutch body (1), the crutch body (1) comprises a central bottom column (11) which can directly contact the ground, and support frames (12) respectively arranged on both sides of the central bottom column (11); the crutch body (1) is provided with a foldable seat plate (2) and a foldable wheelchair support rod (3), and the top end of the wheelchair support rod (3) is provided with a roller (4) which can move on the bottom surface; A locking piece (5) is provided at the bottom of the seat plate (2) of one of the crutches, and a locking fitting piece (6) capable of being matched and fixed with the locking piece (5) is provided at the bottom of the seat plate (2) of the other crutch; a stretchable backrest (7) is provided on the crutch body (1) of one of the crutches, and a backrest fitting piece (8) for fixing the backrest (7) is provided on the crutch body (1) of the other crutch; The support frame (12) is provided with a first rotating mounting seat (17), and the central base column (11) is provided with a second rotating mounting seat (18); the seat plate (2) and the support rod (3) are both connected with a spring pull pin (9), wherein the seat plate (2) can be fixedly matched with the first rotating mounting seat (17) through the spring pull pin (9), and the support rod (3) can be fixedly matched with the second rotating mounting seat (18) through the spring pull pin (9); In the crutch form, the seat plate (2), the backrest (7) and the upwardly folded wheelchair support rod (3) are all in a stowed state, and the bottom of the crutch is in direct contact with the ground; In the wheelchair form, the seat plate (2) is adjusted to a use state by means of a spring pull pin (9) and the two seat plates (2) are connected and fixed by means of a locking member (5) and a locking fitting member (6); the backrest (7) is connected in cooperation with a corresponding backrest fitting member (8); and the wheelchair support rod (3) is folded downward by means of a spring pull pin (9) until the roller (4) is in direct contact with the ground.

2. The adaptive crutch / wheelchair conversion device according to claim 1, characterized in that: The top of the support frame (12) is connected to a crossbeam (13), and the middle of the support frame (12) is connected to a grip rod (14).

3. The adaptive crutch / wheelchair conversion device according to claim 2, characterized in that: The bottom of the central base column (11) is provided with an anti-skid support pad (15); An armpit pad (16) is installed on the crossbeam (13), and the armpit pad (16) is provided with a curved surface that fits the armpit.

4. The adaptive crutch / wheelchair conversion device according to claim 1, characterized in that: The two support frames (12) of the crutch body (1) are each provided with a first rotating mounting seat (17), and the first rotating mounting seat (17) is each provided with a first main hole (171) and at least two first adjustment holes (172); The seat plate (2) comprises a seat plate support plate (21) and a seat cushion (22), wherein a rotating connecting plate (23) is provided at the end of the seat plate support plate (21); The rotating connecting plate (23) is rotated by means of a first rotating shaft (173) that cooperates with the hole axes of the first main holes (171) on both sides, and the rotating connecting plate (23) is connected to the first adjustment hole (172) through a spring pull pin (9) to adjust the seat plate (2) to switch between a storage state and a use state.

5. The adaptive crutch / wheelchair conversion device according to claim 1, characterized in that: The locking member (5) comprises a central knob (51) and a semicircular ring (52), and the central knob (51) and the semicircular ring (52) are connected via a connecting rod (53); The locking fitting (6) comprises an annular positioning piece (61) arranged at the bottom of the seat plate (2) and an arc-shaped groove (62) arranged coaxially with the annular positioning piece (61); the semicircular ring (52) of the locking piece (5) can cooperate with the arc-shaped groove (62) to achieve locking when the center knob (51) is turned.

6. The adaptive crutch / wheelchair conversion device according to claim 1, characterized in that: The second rotating mounting seat (18) is centrally symmetrically arranged at the same horizontal height of the central base column (11), and each of the second rotating mounting seats (18) is provided with a second main hole (181) and a plurality of second adjustment holes (182); The wheelchair support rod (3) is rotated by means of a second rotating shaft (183) which passes through the end of the wheelchair support rod (3) and cooperates with the second main holes (181) on both sides; the wheelchair support rod (3) can be switched between a storage state and a use state by means of a spring pull pin (9) and a cooperative connection with the second adjustment hole (182).

7. The adaptive crutch / wheelchair conversion device according to claim 1, characterized in that: The backrest (7) comprises a stretchable supporting cloth (71) and a storage groove (72) provided on the supporting frame (12) for curling and storing the stretchable supporting cloth (71); The stretchable end of the stretchable supporting cloth (71) is provided with a clamping column (73), and the backrest matching piece (8) is provided with a clamping groove (81) capable of clamping with the clamping column (73).

8. The adaptive crutch / wheelchair conversion device according to claim 1, characterized in that: A foldable foot pedal (31) is provided on the wheelchair support rod (3) at one end close to the roller (4).

9. The adaptive crutch / wheelchair conversion device according to claim 1, characterized in that: The spring pull pin (9) comprises a pull rod (91), a hollow bolt (92) and a spring (93); The pulling rod (91) comprises a pin rod (911), a pulling portion (912) provided at one end of the pin rod (911), and a limiting portion (913) provided at the other end of the pin rod (911), and the hollow bolt (92) is sleeved between the pulling portion (912) and the limiting portion (913); The spring (93) is sleeved between the hollow bolt (92) and the limiting portion (913), and two ends of the spring (93) are respectively in contact with the hollow bolt (92) and the limiting portion (913).

10. The adaptive crutch / wheelchair conversion device according to claim 9, characterized in that: The limiting portion (913) of the spring pull pin (9) can be inserted into the first rotating mounting seat (17) or the second rotating mounting seat (18) and fixed in position.

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