Multifunctional bathing wheelchair capable of autonomously lifting and moving

Abstract

The invention discloses an autonomous lifting and transferring multifunctional bathing wheelchair which comprises a wheelchair body mechanism, and a cushion is arranged at the top of the wheelchair body mechanism and used for bearing a bather; the wheelchair movement mechanisms are symmetrically arranged on the two sides of the wheelchair body mechanism and used for a bather to manually and autonomously control the movement state of the bathing wheelchair; the backrest adjusting mechanism is arranged behind the wheelchair main body mechanism and is used for manually and autonomously adjusting a back leaning position by a bather; the armrest adjusting mechanisms are symmetrically arranged on the two sides of the top of the wheelchair main body mechanism and used for manually and autonomously adjusting the armrest height of the two hands of a bather; and the seat lifting mechanism is arranged in the wheelchair main body mechanism and is used for a bather to manually and autonomously adjust the height of a cushion. According to the invention, a user can autonomously complete the adjustment of the backrest angle, the adjustment of the armrest height and the adjustment of the seat cushion height when sitting on the wheelchair, and complete the rapid switching of the wheel advancing mode and state by operating the handle, and can autonomously complete the bathing process without the assistance of other people.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a multifunctional bathing wheelchair capable of autonomous lifting and transfer. Background Art

[0002] In the daily life of the elderly and the disabled, bathing is a necessary part, which brings cleanliness and health to the elderly and the disabled. However, the complicated steps and unreasonable operation of bathing facilities make bathing for this group of people a matter with many hidden dangers, affecting the quality of their lives. If the bathing needs of this group of people are not met, the risk of disability will increase, thereby increasing the frequency of emergency visits, hospitalizations and return to the hospital, increasing the risk of death, and reducing the quality of life. Especially for the elderly and disabled people with hemiplegia, paraplegia, disability, etc., bathing is a very heavy labor, with disadvantages such as high physical exertion and long working hours.

[0003] The existing bathing-assisting beds are suitable for the elderly and disabled people with moderate to severe limb disabilities. In order to make bathing more convenient for users, the bed surface can be manually adjusted to rise and fall, and users can sit or lie down, and caregivers provide them with bathing care, but the degree of autonomy is relatively low, and it is also labor-intensive for caregivers. For the elderly and disabled, privacy issues are not well taken care of. Therefore, it is very necessary to develop and produce a multifunctional bathing chair that assists the elderly in bathing, which can make the elderly and disabled safer and more comfortable during the bathing process. At the same time, it can reduce the labor intensity of caregivers and improve the quality and efficiency of nursing work.

[0004] Most of the existing bathing wheelchairs have simple structures and functions. Although they are light, they still require assistance from outsiders and are laborious to use. In terms of armrest adjustment, many bathing wheelchairs use fixed armrests, which makes it more difficult for patients to move. In addition, the existing armrest adjustment mechanisms are mostly shaft-type, rotating the armrests behind the body. Although this solves the problem of patient movement obstruction, it is impossible to adjust the height of the armrests, and the comfort is low. At present, the backrest adjustment of bathing wheelchairs mostly requires the assistance of outsiders, and patients cannot adjust it independently when sitting in a wheelchair. In addition, most of the backrests of bathing wheelchairs are hydraulically adjusted, which is expensive, inconvenient to repair and replace, and has relatively low reliability. Non-hydraulic adjustment backrests have simple structures and need to be adjusted before sitting in the wheelchair or assisted by nursing staff. Most seats are fixed seats, which cannot be adjusted in height, cannot meet the height requirements of patients for wheelchairs, and cannot complete high-altitude operations, such as adjusting shower heads and taking bathing items. When patients move, many bathing wheelchairs need to touch the wheels with their hands to realize the forward and backward functions of the wheelchair. The operation is laborious, and direct contact will greatly reduce the safety of the wheelchair. Summary of the invention

[0005] Based on the above research on existing bathing products, the present invention designs a multifunctional bathing wheelchair with autonomous lifting and transfer. In order to solve the problem of comfort adjustment of armrests and obstacles to movement, the present invention designs armrests and fixed spring buckles that can move linearly on the wheelchair, so that patients can easily adjust the armrests while sitting on the wheelchair, and simplifies the steps of adjusting the armrests. In order to solve the problem that the backrest needs the assistance of outsiders and is expensive, the present invention designs a spring buckle to adjust the backrest, and adds Bowden wire force transmission and lever transmission to change the direction of force, so that the backrest angle can be adjusted using the armrest, which improves convenience; and not using hydraulic adjustment of the backrest also reduces costs and increases the reliability of the wheelchair. In order to solve the problem that the seat is fixed and the height cannot be adjusted, the present invention designs a screw-driven scissor lift mechanism, and the seat height can be adjusted by shaking the hand wheel, so as to adapt to the height requirements of different patients for wheelchairs, and facilitate patients to complete operations such as taking bathing items from high places and adjusting the spray head. In order to solve the problem that the wheelchair movement requires the assistance of nursing staff or requires direct contact with the wheel by hand and the operation is laborious, the present invention designs a ratchet pawl transmission mechanism. The force can be transferred to the wheelchair wheels through the handle, which saves more effort, avoids direct contact with the hands, and improves the safety of the wheelchair.

[0006] In order to solve the above technical problems, a technical solution adopted by the present invention is:

[0007] A multifunctional bathing wheelchair capable of autonomous lifting and transfer, comprising

[0008] The main body of the wheelchair has a cushion on the top for carrying the bather;

[0009] The wheelchair movement mechanism is symmetrically arranged on both sides of the wheelchair main body mechanism, and is used for the bather to manually and autonomously control the movement state of the bathing wheelchair;

[0010] The backrest adjustment mechanism is arranged at the rear of the main body of the wheelchair and is used for the bather to manually and autonomously adjust the back rest position;

[0011] The armrest adjustment mechanism is symmetrically arranged on both sides of the top of the wheelchair main body, and is used for the bather to manually and autonomously adjust the height of the armrests;

[0012] And a seat lifting mechanism is arranged inside the main body of the wheelchair and is used for the bather to manually and autonomously adjust the height of the seat cushion.

[0013] Furthermore, the wheelchair main body structure includes wheelchair body frames symmetrically arranged on the left and right sides, a main body supporting curved rod fixedly arranged between the tops of the two wheelchair body frames, and a foot pedal arranged between the front bottoms of the two wheelchair body frames. A front caster is arranged at the front bottom end of each wheelchair body frame, and the seat cushion is located above the two main body supporting curved rods.

[0014] Furthermore, the wheelchair movement mechanism includes a wheelchair main wheel rotatably arranged at the bottom of the rear side of the wheelchair body frame, a large ratchet I and a large ratchet II respectively fixedly connected to the two side end surfaces of the wheelchair main wheel and with opposite stepping directions, and a double pawl rocker assembly rotatably arranged at the top of the front side of the wheelchair body frame, and the power output end of the double pawl rocker assembly is respectively meshed with the large ratchet I and the large ratchet II.

[0015] Furthermore, the double-pawl rocker assembly includes a handle sleeve rotatably connected to the wheelchair body bracket, a rotating handle fixedly arranged at the top of the handle sleeve, and a pawl positioning assembly arranged on both sides of the handle sleeve and symmetrically about the center line of the handle sleeve;

[0016] The pawl positioning assembly includes a pawl rotatably arranged at the bottom end of the handle cover, a bent rod rotatably arranged at the top end of the handle cover, and a slider baffle movably embedded in one side of the handle cover. The free end of the pawl is hinged to the same side end of the bent rod through a long connecting rod, and the other end of the bent rod is provided with a small roller movably embedded in the slider baffle. A locking groove is opened on one side of the bottom of the handle cover, and a slot rod is fixedly arranged on the bottom end of the slider baffle, and the bottom end of the slot rod is slidably arranged in the locking groove. A spring I is connected to one side of the bottom end of the slider baffle, and the other end of the spring I is fixedly connected to the side of the handle cover.

[0017] Furthermore, a through pin shaft socket is provided on the side wall of the handle sleeve, a pin shaft locking socket which can be matched with the pin shaft socket is provided on the wheelchair body bracket, a pin shaft is movably provided in the pin shaft socket, and the inner end of the pin shaft can be movably inserted in the pin shaft locking socket.

[0018] Furthermore, the backrest adjustment mechanism includes an adjustment rod assembly symmetrically arranged on both sides of the wheelchair main body mechanism, and a backrest plate fixedly arranged between the two adjustment rod assemblies. The adjustment rod assembly includes a handrail rotatably connected to the top of the rear side of the wheelchair body frame, a telescopic positioning rod assembly rotatably connected to the bottom of the rear side of the wheelchair body frame, a locking assembly rotatably arranged on the outside of the telescopic positioning rod assembly, and a swing handle rotatably arranged on the top of the wheelchair body frame. The top end of the telescopic positioning rod assembly is rotatably connected to the side of the handrail, and the power output end of the swing handle is connected to the power input end of the locking assembly through a Bowden cable.

[0019] Further, the telescopic positioning rod assembly includes an insertion lifting rod, a wrapping lifting rod movably sleeved on the outside of the insertion lifting rod, and a spring II sleeved inside the wrapping lifting rod and located between the insertion lifting rod and the wrapping lifting rod. A plurality of positioning holes I are provided on the side wall of the insertion lifting rod, and a spring buckle I is provided in each positioning hole I. A plug-in hole that can be sequentially matched with the positioning hole I is provided on the top side wall of the wrapping lifting rod, and the spring buckle I can be movably inserted into the plug-in hole.

[0020] The locking assembly includes a lever bracket fixedly arranged on the outside of the wrapped lifting rod, a small lever rotatably connected to the lever bracket, an arc-shaped protrusion fixedly arranged on the inner side of the free end of the small lever, and the arc-shaped protrusion is located in the plug-in hole.

[0021] Furthermore, the seat lifting mechanism includes a lifting platform base frame assembly fixedly arranged between the bottoms of two wheelchair body supports, a scissors-type lifting assembly connected to the top of the lifting platform base frame assembly, and a lifting platform top frame assembly connected to the top of the scissors-type lifting assembly. A screw nut pair for driving the scissors-type lifting assembly to lift and lower is arranged at the bottom of the lifting platform top frame assembly, a hand-cranked rotating assembly is arranged at the front side of the bottom of the lifting platform top frame assembly, a power output end of the hand-cranked rotating assembly is transmission-connected to the power input end of the screw nut pair, and the seat cushion is fixedly connected to the top of the lifting platform top frame assembly.

[0022] Furthermore, the hand-cranked rotating assembly includes a handwheel shaft horizontally connected to the front side of the lifting platform top frame assembly, a handwheel movably mounted on the front end of the handwheel shaft, and a handwheel limiting plate fixedly arranged on the front side of the lifting platform top frame assembly and movably mounted on the outside of the handwheel shaft, a limiting slot opening is provided in the handwheel limiting plate, and a limiting plug-in protrusion movably engaged with the limiting slot is provided on the inner side surface of the handwheel.

[0023] Furthermore, the armrest adjustment mechanism includes a fixed plug-in rod fixedly arranged in the wheelchair body bracket, a lifting armrest movably plugged into the top of the fixed plug-in rod, and a spring III sleeved in the fixed plug-in rod and located between the fixed plug-in rod and the lifting armrest. A plurality of positioning holes II are opened on the side wall of the fixed plug-in rod, and a spring buckle II which can be paired and plugged with the positioning holes II in sequence is embedded in the side wall of the lifting armrest.

[0024] A method for using a multifunctional bathing wheelchair capable of autonomous lifting and transfer is also provided, and the method uses the multifunctional bathing wheelchair capable of autonomous lifting and transfer as described above, and comprises the following steps:

[0025] S1. The user sits on the main body of the bathing wheelchair;

[0026] S2. The user adjusts the backrest adjustment mechanism to a suitable angle by coordinating the hands and back;

[0027] S3, the user manually adjusts the seat lifting mechanism until the seat cushion reaches a suitable height;

[0028] S4, the user manually adjusts the armrest adjustment mechanism until the top reaches a suitable height for both hands to rest on;

[0029] S5. The user controls the motion state of the wheelchair motion mechanism through manual operation to realize the forward, backward and steering functions of the wheelchair and make the wheelchair reach the designated position;

[0030] S6, the user adjusts the wheelchair movement mechanism to the movement locking state to fix the wheelchair in place;

[0031] S7. Everything is ready, and the user starts taking a bath.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] 1. The present invention adopts two reverse ratchet pawl lever transmission mechanisms to transmit hand strength to the wheelchair wheels through the handle, which is convenient for patients with insufficient strength to use and avoids direct hand contact, which is more labor-saving and improves the safety of the wheelchair. It solves the problem that the movement of the wheelchair requires the assistance of nursing staff or the direct contact of the hands with the wheels and the laborious operation.

[0034] 2. The double-pawl rocker assembly of the present invention adopts a parallelogram mechanism. The pawl position is changed by pressing the slider baffle. The forward / reverse gear position and the locked state of the wheelchair can be conveniently switched at the handle, which is simple and convenient to operate.

[0035] 3. The present invention adopts spring buckles and modular movable armrests. By pressing the spring buckle movable armrest, the user can adjust the height of the armrest independently on the wheelchair.

[0036] 4. The present invention adopts a structure in which a spring buckle is used to adjust and fix the backrest and a spring offsets the force, and adds a Bowden cable to transmit the force and a lever to transmit and change the direction of the force, so that the user can adjust the backrest angle by pressing the handle at the front end of the wheelchair while sitting on the wheelchair, avoiding the need for a caregiver to assist in adjusting the backrest, achieving completely autonomous adjustment, and improving the convenience of the adjustment operation; at the same time, when adjusting the backrest, the spring offsets part of its own gravity, and the spring buckle will be fixed in the corresponding gear position, thereby facilitating the adjustment and saving effort. Not using hydraulic pressure to adjust the backrest also reduces costs, increases the reliability of the wheelchair, and solves the problem that the backrest adjustment requires outsider assistance and is expensive.

[0037] 5. The present invention designs a screw-driven scissor lift mechanism, which allows the seat height to be adjusted by shaking the hand wheel with relatively little force, thereby meeting the height requirements of different patients for wheelchairs, solving the problem of a fixed seat and inability to adjust the height, and making it easier for patients to complete operations such as taking bathing items from a high place and adjusting the bathing nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0039] Figure 2 is a schematic diagram of the three-dimensional structure of the main body of the wheelchair;

[0040] Figure 3is a schematic diagram of the three-dimensional structure of the wheelchair movement mechanism;

[0041] Figure 4 is one of the three-dimensional structural schematic diagrams of the double-pawl rocker assembly;

[0042] Figure 5 The second is a schematic diagram of the three-dimensional structure of the double-pawl rocker assembly;

[0043] Figure 6 is a schematic diagram of the three-dimensional structure of the slider baffle;

[0044] Figure 7 is a three-dimensional structural schematic diagram of the backrest adjustment mechanism;

[0045] Figure 8 is a schematic diagram of the three-dimensional structure of the locking assembly;

[0046] Fig. 9 is a schematic diagram of the three-dimensional structure of the telescopic positioning rod assembly;

[0047] Fig.10 is a schematic diagram of the three-dimensional structure of the armrest adjustment mechanism;

[0048] Fig.11 is a schematic diagram of the three-dimensional structure of the seat lifting mechanism;

[0049] Fig.12 It is a three-dimensional structural schematic diagram of the screw nut pair and the hand-cranked rotating assembly.

[0050] In the figure: 1. wheelchair main body; 101. foot pedal; 102. main body support curved rod; 103. front caster; 104. wheelchair body bracket; 2. wheelchair movement mechanism; 201. wheelchair main wheel; 202. large ratchet I; 203. large ratchet II; 204. double ratchet rocker assembly; 2041. handle sleeve; 20411. pin shaft socket; 2042. rotating handle; 2043. ratchet; 2044. curved rod; 2045. long connecting rod; 2046. small roller; 2047. Slider baffle; 20471, rolling slide; 20472, guide slide; 2048, slot rod; 2049, spring I; 3, backrest adjustment mechanism; 301, handrail; 302, locking assembly; 3021, lever bracket; 3022, small lever; 303, swing handle; 304, Bowden line; 305, telescopic positioning rod assembly; 3051, insert lifting rod; 3052, wrap lifting rod; 3053, spring II; 3054, snap I; 306, backrest plate ; 307, handle support; 4, armrest adjustment mechanism; 401, fixed plug rod; 402, lifting armrest; 403, button; 5, seat lifting mechanism; 501, lifting platform frame assembly; 5011, supporting round rod; 5012, base plate; 5013, I-shaped base plate; 502, scissor lift assembly; 5021, slider connecting plate; 5022, scissor rod I; 5023, scissor rod II; 503, lifting platform top frame assembly; 5031, curved rod; 5032, hand wheel Bearing seat support plate; 5033, screw bearing seat support plate I; 5034, screw bearing seat support plate II; 5035, seat support bent rod; 5036, reinforced support bent rod; 5037, screw slider connecting plate; 504, screw nut pair; 5041, ball screw; 5042, nut seat; 5043, screw bearing seat; 505, hand crank rotation assembly; 5051, hand wheel shaft; 5052, hand wheel; 5053, hand wheel limit plate; 5054, hand wheel bearing seat; 6, seat cushion. DETAILED DESCRIPTION

[0051] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0052] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0054] See also Figures 1 to 11 The present invention provides a multifunctional bathing wheelchair with autonomous lifting and transfer, comprising a wheelchair main body mechanism 1, with a seat cushion 6 arranged on the top for carrying a bather; a wheelchair movement mechanism 2, symmetrically arranged on both sides of the wheelchair main body mechanism 1, for the bather to manually and autonomously control the movement state of the bathing wheelchair; a backrest adjustment mechanism 3, arranged at the rear of the wheelchair main body mechanism 1, for the bather to manually and autonomously adjust the back support position; an armrest adjustment mechanism 4, symmetrically arranged on both sides of the top of the wheelchair main body mechanism 1, for the bather to manually and autonomously adjust the height of the handrails; and a seat lifting mechanism 5, arranged inside the wheelchair main body mechanism 1, for the bather to manually and autonomously adjust the height of the seat cushion 6.

[0055] Specifically, Figure 2 As shown, the wheelchair main body mechanism 1 includes a wheelchair body bracket 104 symmetrically arranged on the left and right sides, a main body support curved rod 102 fixedly arranged between the tops of the two wheelchair body brackets 104, and a footrest 101 arranged between the front bottoms of the two wheelchair body brackets 104. A front caster 103 is arranged at the front bottom end of each wheelchair body bracket 104, and the seat cushion 6 is located above the two main body support curved rods 102. The wheelchair body bracket 104 is a gantry structure welded by two front and rear vertical rods, an upper horizontal bar between the tops of the two vertical rods, and a lower horizontal bar between the middle parts of the two vertical rods. The front caster 103 is fixedly connected to the bottom end of the front vertical rod by a bolt pair. The front and rear main body support curved rods 102 are U-shaped structures, and the ends of the vertical sections on both sides are downwardly arranged between the two front vertical rods / rear vertical rods, and are connected and fixed by a nut pair. The footrest 101 is a frame structure composed of a U-shaped tube and a number of beams welded inside the U-shaped tube. Positioning sleeves are fixedly connected to the two ends of the U-shaped tube. The two positioning sleeves are slidably sleeved on the outside of the bottom ends of the two front vertical rods and are located above the front casters 103. They are fastened to the front vertical rods by locking screws, so that the vertical position of the footrest 101 on the wheelchair body bracket 104 is adjustable to meet the needs of the user's leg bending and foot placement comfort. An extension rod 105 is also welded and fixed to the rear side of the bottom end of the rear vertical rod for connecting the bottom end of the backrest adjustment mechanism 3. The entire wheelchair main body mechanism 1 supports the weight of the user and connects various functional parts.

[0056] Since the wheelchair motion mechanism 2 is symmetrically arranged on both sides of the wheelchair main body mechanism 1, only the specific structural composition and assembly relationship of the wheelchair motion mechanism 2 on the right side are described in detail here. Figure 3 As shown, the wheelchair motion mechanism 2 includes a wheelchair main wheel 201 rotatably arranged at the bottom of the rear side of the wheelchair body support 104, a large ratchet I202 and a large ratchet II203 respectively fixedly connected to the end surfaces of both sides of the wheelchair main wheel 201 and with opposite stepping directions, and a double-pawl rocker assembly 204 rotatably arranged at the top of the front side of the wheelchair body support 104, and the power output end of the double-pawl rocker assembly 204 is respectively meshed with the large ratchet I202 and the large ratchet II203. Specifically, the outermost edge diameters of the large ratchet I202 and the large ratchet II203 are not larger than the diameter of the wheelchair main wheel 201, and a number of evenly distributed (such as Figure 3 The large ratchet I 202 and the large ratchet II 203 are respectively fixedly connected to the wheelchair main wheel 201 by matching the pins with the pin holes, and are coaxially arranged with the wheelchair main wheel 201. The axis of the wheelchair main wheel 201 is rotatably connected to the bottom outer side of the rear side vertical rod of the wheelchair body bracket 104 through a rotating shaft and a bearing to form a rotating pair.

[0057] like Figure 4 and Figure 5 As shown, the double ratchet rocker assembly 204 includes a handle sleeve 2041 rotatably connected to the wheelchair body bracket 104, a rotating handle 2042 fixedly arranged at the top of the handle sleeve 2041, and a ratchet positioning assembly arranged at both sides of the handle sleeve 2041 and symmetrical about the center line of the handle sleeve 2041. Specifically, the handle sleeve 2041 is a cubic box structure, the rotating handle 2042 is welded to the top side of the handle sleeve 2041, a bolt shaft is fixedly arranged on the side of the handle sleeve 2041, and a shaft sleeve (not shown in the figure) is arranged on the outer side of the bolt shaft. The shaft sleeve is fixedly arranged in the middle position of the upper cross bar of the wheelchair body bracket 104, and the end thread section of the bolt shaft is threadedly connected to the inner side wall of the upper cross bar, so that a rotating pair is formed between the handle sleeve 2041 and the upper cross bar, and at the same time, the handle sleeve 2041 always maintains a connection relationship with the upper cross bar during the reciprocating swinging process and does not fall off.

[0058] Since the two groups of pawl positioning components have the same structural composition, only the positional relationship on the inner and outer side surfaces of the handle cover 2041 is different. Here, only one group of pawl positioning components on the outer side of the handle cover 2041 is represented, and its specific structural composition and assembly relationship are described in detail.

[0059] like Figure 4As shown, the pawl positioning assembly includes a pawl 2043 rotatably set at the bottom end of the handle cover 2041, a bent rod 2044 rotatably set at the top end of the handle cover 2041, and a slider baffle 2047 movably embedded in one side of the handle cover 2041. The free end of the pawl 2043 is hinged to the same side end of the bent rod 2044 through a long connecting rod 2045. The other end of the bent rod 2044 is provided with a small roller 2046 movably embedded in the slider baffle 2047. A locking groove is opened on one side of the bottom of the handle cover 2041, and a slot rod 2048 is fixedly set on the bottom end of the slider baffle 2047. The bottom end of the slot rod 2048 is slidably set in the locking groove. A spring I2049 is connected to one side of the bottom end of the slider baffle 2047, and the other end of the spring I2049 is fixedly connected to the side of the handle cover 2041.

[0060] Specifically, the pawl 2043 forms a revolving pair with the bottom end of the side wall of the handle sleeve 2041 through a bolt shaft; the bent rod 2044 is a V-shaped structure, and the middle part forms a revolving pair with the top end of the side wall of the handle sleeve 2041 through a bolt shaft; one end of the long connecting rod 2045 is connected to the free end of the pawl 2043 through a micro bearing to form a revolving pair, and the other end is connected to the lower end of the bent rod 2044 through a micro bearing to form a revolving pair. The small roller 2046 is fixed to the inner side of the top end of the bent rod 2044 through a threaded connection. Figure 6 As shown, an inclined rolling groove 20471 is provided in the middle of the slider baffle 2047, and a guide slide bar 20472 with a T-shaped cross section is fixedly provided at the upper edge of the bottom of the inner side. The small roller 2046 is located in the rolling groove 20471 and is in rolling contact with the groove walls on both sides of the guide groove 20471. A strip guide groove (not shown in the figure) is provided at the upper edge of the outer wall of the handle sleeve 2041, and the guide slide bar 20472 is slidably embedded in the strip guide groove, so that a linear moving pair is formed between the slider baffle 2047 and the handle sleeve 2041. The locking groove is located at the bottom of the outer wall of the handle sleeve 2041, which is approximately "W" shaped. The bottom end of the slot rod 2048 is movably embedded in the locking groove and slides tangentially with the groove wall. A lower connecting boss is provided at the bottom end of the slider baffle 2047, and an upper connecting boss located above the lower connecting boss is also provided on the outer wall of the handle sleeve 2041, and both ends of the spring I2049 are fixedly connected to the lower connecting boss and the upper connecting boss respectively.

[0061] At the same time, a through pin shaft insertion hole 20411 is provided on the side wall of the handle sleeve 2041, and a plug-in board is fixedly provided on the outer side of the wheelchair body support 104, and a pin shaft locking insertion hole (not shown in the figure) that can be matched with the pin shaft insertion hole 20411 is provided on the plug-in board, and a pin shaft is movably provided in the pin shaft insertion hole 20411, and the inner side end of the pin shaft can be movably plugged into the pin shaft locking insertion hole. When the pin shaft is located outside the pin shaft locking insertion hole, the handle sleeve 2041 can rotate relative to the wheelchair body support 104 around the bolt shaft thereon, and when the handle sleeve 2041 rotates until the pin shaft insertion hole 20411 and the pin shaft locking insertion hole are coaxial, the pin shaft is inserted through the shaft insertion hole 20411 and the pin shaft locking insertion hole, and then the pin shaft and the bolt shaft on the handle sleeve 2041 form a fixed position structure of two points and one line, and the handle sleeve 2041 and the wheelchair body support 104 cannot rotate relative to each other, and the position of the handle sleeve 2041 is locked.

[0062] by Figure 3 and Figure 4The use process of the double pawl rocker assembly 204 is explained by taking the perspective shown as an example. In actual use, the user manually presses down the handle at the top of the slider baffle 2047 to move the slider baffle 2047 downward, thereby driving the slot rod 2048 below it to move downward synchronously, and the bottom end of the slot rod 2048 slides down along the groove wall of the locking groove to the bottom position and automatically locks at the middle top position of the "W" shape. At this time, the spring I2049 is in a stretched state. In this process, the slider baffle 2047 drives the upper end of the bent rod 2044 to move downward through the small roller 2046, so that the bent rod 2044 rotates counterclockwise around its bolt axis, and the small roller 2046 slides in the rolling groove 20471 to adaptively adjust the change in the relative position between the end of the bent rod 2044 and the slider baffle 2047. After the bent rod rotates counterclockwise, its lower end moves upward, thereby driving the pawl 2043 to rotate counterclockwise around its bolt axis through the long connecting rod 2045, so that the free end of the pawl 2043 is lifted, thereby disengaging from the tooth groove of the large ratchet wheel 1202 and breaking the meshing relationship. The user presses down the handle at the top of the slider baffle 2047 again to move the slider baffle 2047 downward, thereby driving the slot rod 2048 below it to move downward synchronously, and the bottom end of the slot rod 2048 slides down along the groove wall of the locking groove to the bottom position. At this time, the restoring force of the spring I2049 drives the slider baffle 2047 to rebound, so that the slot rod 2048 returns to the uppermost position; in this process, the slider baffle 2047 drives the bent rod 2044 to rotate clockwise through the small roller 2046, and then drives the pawl 2043 to rotate counterclockwise around its bolt axis through the long connecting rod 2045, thereby realizing the depression of the pawl 2043. At this time, the pawl 2043 is located in the tooth groove of the large ratchet wheel I202 and is in a meshing connection state again. In this state, when the user sitting on the wheelchair holds the rotating handle 2042 and pulls it upward, the pawl 2043 and the handle sleeve 2041 rotate counterclockwise synchronously, and the pawl 2043 pushes the large ratchet wheel 1202 to rotate clockwise, thereby driving the right main wheel of the wheelchair 201 to rotate synchronously in one direction, thereby realizing the forward movement of the right wheel.

[0063] like Figure 5 As shown, the double pawl rocker assembly 204 is provided with a pawl positioning assembly on the other side (inner side) of the handle sleeve 2041 and the pawl positioning assembly (such as Figure 4The two wheelchairs 2041 and 2042 are identical in structure and composition, and only differ in the installation position, that is, the two ratchet positioning assemblies are symmetrically arranged around the central axis thread center of the handle sleeve 2041. Therefore, the use process and specific functions of the ratchet positioning assembly on this side are similar to those of the ratchet positioning assembly on the outside, and can drive the main wheel 201 of the wheelchair on the right side to rotate counterclockwise in one direction, so as to realize the backward movement of the right wheel. When the two ratchets 2043 in the same ratchet positioning assembly are simultaneously engaged and connected with the large ratchet I202 and the large ratchet II203 on the corresponding side, the ratchet mechanisms on both sides constitute an interlocking mechanism, and neither can realize rotation. Then, the position of the handle sleeve 2041 is locked by the pin shaft, so that the handle sleeve 2041 and the wheelchair body bracket 104 cannot rotate relative to each other, thereby locking the right wheel in the original position. Since the two wheelchair motion mechanisms 2 are symmetrically arranged on both sides of the wheelchair main body mechanism 1, the wheelchair motion mechanism 2 on the left side can realize the unidirectional forward or backward movement of the left wheel alone through the same operation as mentioned above. When the right wheel is locked and the left wheel moves alone, the wheelchair can turn around the bottom fulcrum of the right wheel. After the movement states of the wheels on both sides are switched, turning in opposite directions can be achieved. When the wheels on both sides move forward or backward at the same time, the wheelchair moves forward or backward as a whole.

[0064] like Figure 7 As shown, the backrest adjustment mechanism 3 includes adjustment rod assemblies symmetrically arranged on both sides of the wheelchair main body mechanism 1, and a backrest plate 306 fixedly arranged between the two adjustment rod assemblies. The adjustment rod assembly includes a handrail 301 rotatably connected to the top of the rear side of the wheelchair body support 104, a telescopic positioning rod assembly 305 rotatably connected to the bottom of the rear side of the wheelchair body support 104, a locking assembly 302 rotatably arranged on the outside of the telescopic positioning rod assembly 305, and a swing handle 303 rotatably arranged on the top of the wheelchair body support 104. The top end of the telescopic positioning rod assembly is rotatably connected to the side of the handrail 301, and the power output end of the swing handle 303 is connected to the power input end of the locking assembly 302 through a Bowden cable 304.

[0065] Specifically, the bottoms of the handrails 301 on both sides are welded and connected by a rotating rod, and the two ends of the rotating rod are respectively rotatably connected to the top inner sides of the two vertical rods on the rear side of the wheelchair body bracket 104 on both sides through a rotating shaft and a bearing, so that a rotating pair is formed between the handrail 301 and the wheelchair body bracket 104. The middle parts of the handrails 301 on both sides are respectively welded with an upper handrail horizontal bar and a lower handrail horizontal bar, and the backrest plate 306 is respectively fixedly connected to the upper handrail horizontal bar and the lower handrail horizontal bar by a bolt pair.

[0066] like Fig. 9As shown, the telescopic positioning rod assembly 305 includes an insertion lifting rod 3051, a wrapping lifting rod 3052 movably mounted on the outside of the insertion lifting rod 3051, and a spring II3053 mounted inside the wrapping lifting rod 3052 and located between the insertion lifting rod 3051 and the wrapping lifting rod 3052. A plurality of positioning holes I are provided on the side wall of the insertion lifting rod 3051, and a spring buckle I3054 is provided in each positioning hole I. The wrapping lifting rod 3052 is provided with a mating hole that can be paired with the positioning hole I in sequence, and the spring buckle I3054 can be movably inserted into the mating hole. Specifically, the bottom end of the inserted lifting rod 3051 is rotatably connected to the inner side of the rear end of the extension rod 105 through a rotating shaft and a bearing, and the top end of the wrapped lifting rod 3052 is rotatably connected to the outer side of the bottom of the handrail 301 through a rotating shaft and a bearing, thereby forming a triangular connecting rod mechanism between the handrail 301, the telescopic positioning rod assembly 305 and the wheelchair body frame 104. By adjusting the overall length of the telescopic positioning rod assembly 305, the swing angle of the handrail 301 can be adjusted accordingly, thereby adjusting its relative position with the wheelchair body frame 104.

[0067] like Figure 8 As shown, the locking assembly 302 includes a lever bracket 3021 fixedly arranged on the outside of the wrapped lifting rod 3052, a small lever 3022 rotatably connected to the lever bracket 3021, and an arc-shaped protrusion fixedly arranged on the inner side of the free end of the small lever 3022, and the arc-shaped protrusion is located in the plug-in hole. In the non-inserted state of the spring buckle I3054, a linear pair that can move relatively is formed between the inserted lifting rod 3051 and the wrapped lifting rod 3052. When the plug-in hole is coaxial with one of the positioning holes I, the spring buckle I3054 is inserted into the plug-in hole and the positioning hole I at the same time, so as to realize the fixed setting of the relative position between the inserted lifting rod 3051 and the wrapped lifting rod 3052, thereby adjusting the overall length of the telescopic positioning rod assembly 305, and then adjusting the relative posture between the handrail 301 and the wheelchair body bracket 104 to meet the back support needs of the user. A handle support 307 is fixedly provided at the rear side of the middle of the upper horizontal bar of the wheelchair body support 104. One end of the swing handle 303 is rotatably connected to the top of the handle support 307, and the end is connected to the power input end of the Bowden cable 304. The other end of the Bowden cable 304 is connected to the power input end of the left end of the small lever 3022. The other end of the swing handle 303 is bent and arranged to the upper front side, so that the user sitting in the wheelchair can operate the swing handle 303. A limiting boss is integrally provided at the bottom of the outer side of the wrapped lifting rod 3052. The lever support 3021 is sleeved on the outer side of the wrapped lifting rod 3052 and fixedly connected to the limiting boss, so that the axial relative positions of the lever support 3021, the small lever 3022 and the wrapped lifting rod 3052 are fixed, and the arc-shaped protrusion on the small lever 3022 can always be in contact with the snap buckle I3054 located in the mating hole.

[0068] During actual use, when the user needs to adjust the backrest position, he presses down the swing handles 303 on both sides with both hands. After the swing handles 303 rotate, their ends pull the small lever 3022 to rotate around the axis through the Bowden cable 304, and the small lever 3022 presses down the spring buckle I3054 on the corresponding side through the arc-shaped protrusion on the inner side of its free end. Under the thrust of the spring II3053, the spring buckle I3054 is pressed into the interior of the wrapped lifting rod 3052, so that the inserted lifting rod 3051 and the wrapped lifting rod 3052 on the corresponding side are in a free state of relative movement, so that the overall length of the telescopic positioning rod assembly 305 can be adjusted, and then the relative position between the handrail 301 and the wheelchair body bracket 104 can be adjusted to realize the backrest adjustment function. In this state, when the user leans on the backrest board 306, the force generated by the back causes the handrail 301 to rotate backward and laterally, thereby pressing down the wrapping lifting rod 3052 to move downward relative to the insertion lifting rod 3051, until the next spring buckle I3054 reaches the position of the plug-in hole and automatically pops out and inserts into the plug-in hole. In this process, the spring II3053 is compressed, which plays a buffering role in the relative movement of the wrapping lifting rod 3052. After the spring buckle I3054 pops out and inserts into the plug-in hole, the wrapping lifting rod 3052 is relatively fixed to the insertion lifting rod 3051, so that the handrail 301 is relatively fixed to the wheelchair body support 104. Since the downward pressure of the hand on the swing handle 303 disappears at this time, the end of the spring buckle I3054 acts on the arc-shaped protrusion on the small lever 3022, so that the small lever 3022, the Bowden cable 304 and the swing handle 303 are reset. On the contrary, when the user stands up from a semi-reclining position, the swing handle 303 is operated in the same manner as described above, so that the insertion lifting rod 3051 and the wrapping lifting rod 3052 on the corresponding side are in a free state of relative movement, and the spring II3053 in a compressed state generates an upward thrust on the wrapping lifting rod 3052 to assist the user to stand up.

[0069] like Fig.10As shown, the armrest adjustment mechanism 4 includes a fixed plug rod 401 fixedly arranged in the wheelchair body bracket 104 (specifically, the middle position of the upper horizontal bar and the lower horizontal bar), a lifting armrest 402 movably plugged into the top of the fixed plug rod 401, and a spring III (not shown in the figure) sleeved in the fixed plug rod 401 and located between the fixed plug rod 401 and the lifting armrest 402. A plurality of positioning holes II are opened on the side wall of the fixed plug rod 401, and a spring buckle II that can be paired with the positioning holes II in sequence is embedded in the side wall of the lifting armrest 402. The lifting armrest 402 is composed of a vertical rod at the bottom and a horizontal bar at the top, that is, it is T-shaped, and the outer side of the top horizontal bar is covered with a soft pad to enhance the comfort of the user's hand holding. In order to prevent the lifting armrest 402 from rotating relative to the fixed plug rod 401 during the vertical lifting process, the cross-sections of the lifting armrest 402 and the fixed plug rod 401 are matched non-circular, and in this embodiment, both adopt elliptical cross-sections.

[0070] At the same time, in order to facilitate the user to adjust the height of the lifting armrest 402 while sitting on the wheelchair, a push rod is connected to the vertical rod of the lifting armrest 402 through a return spring (the return spring and the push rod are not shown), and the top of the push rod is fixedly connected to a button 403 embedded in the top horizontal bar. By pressing the button 403, the spring buckle II can be pressed into the vertical rod of the lifting armrest 402 through the bottom end of the push rod, so that the spring buckle II is disengaged from the positioning hole II, and the lifting armrest 402 and the fixed plug-in rod 401 are in a relatively movable active state; under the action of the spring III, the lifting armrest 402 moves vertically upward, and under the pressing action of the user's hand, the lifting armrest 402 moves vertically downward, thereby adjusting the matching position of the upper spring buckle II of the lifting armrest 402 and the positioning hole II on the fixed plug-in rod 401. After the button 403 is released, the push rod rises and resets under the action of the reset spring, and the surface of the spring buckle II slides in contact with the inner wall of the fixed plug rod 401 until it moves to a certain positioning hole II and automatically pops outward and inserts into the positioning hole II, thereby fixing the relative position between the lifting armrest 402 and the fixed plug rod 401.

[0071] like Fig.11 and Fig.12As shown, the seat lifting mechanism 5 includes a lifting platform base frame assembly 501 fixedly arranged between the bottoms of the two wheelchair body supports 104, a scissors-type lifting assembly 502 connected to the top of the lifting platform base frame assembly 501, and a lifting platform top frame assembly 503 connected to the top of the scissors-type lifting assembly 502. A screw nut pair 504 for driving the scissors-type lifting assembly 502 to lift and lower is arranged at the bottom of the lifting platform top frame assembly 503, a hand-cranked rotating assembly 505 is arranged on the front side of the bottom of the lifting platform top frame assembly 503, a power output end of the hand-cranked rotating assembly 505 is transmission-connected to the power input end of the screw nut pair 504, and the seat cushion 6 is fixedly connected to the top of the lifting platform top frame assembly 503.

[0072] Specifically, the lifting platform base frame assembly 501 includes supporting round rods 5011 which are respectively fixedly connected to the inner bottom end of the wheelchair body bracket 104 through nut pairs, a base plate 5012 which is fixedly connected to the front end of the top surfaces of the two supporting round rods 5011 through bolt pairs, and an I-shaped base plate 5013 which is fixedly connected to the rear end of the top surfaces of the two supporting round rods 5011 through bolt pairs. The scissors-type lifting assembly 502 includes two guide rails I fixedly connected to the top surface of an I-shaped base plate 5013 and arranged in parallel along the front-to-back direction, a slider I slidably connected to the guide rails I, and a slider connecting plate 5021 fixedly connected to the top surfaces of the two sliders I, bearing seats are fixedly provided on both sides of the top surface of the slider connecting plate 5021, and the top of each bearing seat is rotatably connected to a scissors-type rod I5022 through a bolt shaft and a bearing, and bearing seats are also fixedly provided on the left and right sides of the top surface of the base plate 5012, and the top of each bearing seat is rotatably connected to a scissors-type rod II5023 through a bolt shaft and a bearing, and the middle parts of the scissors-type rod I5022 and II5023 located on the same side are rotatably connected through a rotating shaft and a bearing, and bearing end covers are respectively provided at both ends of the rotating shaft for axial positioning of the internal bearings.

[0073] The lifting platform top frame assembly 503 includes two curved rods 5031 arranged symmetrically on the left and right, a handwheel bearing seat support plate 5032 fixedly connected to the front end of the top surface of the two curved rods 5031 by a bolt pair, a screw bearing seat support plate I5033 fixedly connected to the middle part of the top surface of the two curved rods 5031 by a bolt pair, a screw bearing seat support plate II5034 fixedly connected to the rear end of the top surface of the two curved rods 5031 by a bolt pair, a seat support bent rod 5035 welded to the front side of the top of each curved rod 5031, and two reinforced support bent rods 5036 fixedly connected to the inner side of the front end and the inner side of the rear end of the two seat support bent rods 5035 by a bolt pair, and the bottom surface of the seat cushion 6 is fixedly connected to the top of the seat support bent rods 5035 on both sides by screws.

[0074] Two guide rails II arranged parallel to the front and rear directions are fixedly connected to the left and right sides of the bottom surfaces of the screw bearing seat support plate I5033 and the screw bearing seat support plate II5034, the bottom of the guide rail I is slidably connected to a slider II, the bottom surfaces of the two sliders II are fixedly connected to a screw slider connecting plate 5037, and bearing seats are fixedly arranged on both sides of the bottom surface of the screw slider connecting plate 5037, and each bearing seat is rotatably connected to the top of the scissor rod II5023 on the corresponding side through a rotating shaft and a bearing. Bearing seats are also fixedly arranged on both sides of the bottom surface of the handwheel bearing seat support plate 5032, and each bearing seat is rotatably connected to the top of the scissor rod I5022 on the corresponding side through a rotating shaft and a bearing. In this way, when the upper / lower ends of the scissors rod I5022 and the scissors rod II5023 approach each other, the vertical height of their upper ends rises, causing the seat cushion 6 located above to rise; conversely, when the upper / lower ends of the scissors rod I5022 and the scissors rod II5023 move away from each other, the vertical height of their upper ends decreases, causing the seat cushion 6 located above to lower.

[0075] The screw nut pair 504 is composed of a ball screw 5041 and a nut seat 5042 threadedly sleeved on the ball screw 5041. The middle of the bottom surface of the screw bearing seat support plate I5033 and the screw bearing seat support plate II5034 are respectively fixedly provided with a screw bearing seat 5043 for fixed support of the shaft diameters at both ends of the ball screw 5041. The screw slider connecting plate 5037 is fixedly connected to the bottom surface of the nut seat 5042 by screws.

[0076] The hand-cranked rotating assembly 505 includes a handwheel shaft 5051 horizontally rotatably connected to the front side of the lifting platform top frame assembly 503, a handwheel 5052 movably sleeved on the front end of the handwheel shaft 5051, and a handwheel limiting plate 5053 fixedly arranged on the front side of the lifting platform top frame assembly 503 and movably sleeved on the outside of the handwheel shaft 5051. A limiting slot opening is provided in the handwheel limiting plate 5053, and a limiting plug-in protrusion movably plugged into the limiting slot is provided on the inner side of the handwheel 5052. Specifically, a handwheel bearing seat 5054 is fixedly connected to the middle of the bottom surface of the handwheel bearing seat support plate 5032, and the front end of the handwheel shaft 5051 is rotatably installed in the handwheel bearing seat 5054, and the rear end is connected to the power input end of the ball screw 5041 through a coupling. The top of the handwheel limiting plate 5053 is fixed to the top of the handwheel bearing seat support plate 5032 by screws. The hand wheel 5052 can perform a small range of axial movement at the axial end of the hand wheel shaft 5051 to achieve the plug-in fit or separation between the limiting plug-in protrusion and the limiting slot opening.

[0077] When the seat needs to be raised or lowered, the user pulls the hand wheel 5052 forward to move the limit plug-in protrusion thereon out of the limit slot, and then shakes the hand wheel 5052 through the handle on the hand wheel 5052 to rotate continuously, and then drives the ball screw 5041 to rotate through the hand wheel shaft 5051, thereby driving the nut seat 5042 to move forward or backward horizontally, so that the upper ends of the scissor rod I5022 and the scissor rod II5023 approach or move away from each other, thereby correspondingly achieving the increase or decrease of the height of the upper ends, so that the seat cushion 6 fixed thereon is synchronously raised or lowered. When the lifting adjustment is completed, the hand wheel 5052 is pushed backward to insert the limit plug-in protrusion into the limit slot, so that the axial rotation locking function of the hand wheel 5052 is realized.

[0078] A method for using a multifunctional bathing wheelchair capable of autonomous lifting and transfer, using the multifunctional bathing wheelchair capable of autonomous lifting and transfer as described above, comprises the following steps:

[0079] S1. The user sits on the wheelchair main body 1 of the bathing wheelchair;

[0080] S2, the user adjusts the backrest adjustment mechanism 3 to a suitable angle by using the cooperation of hands and back;

[0081] S3, the user manually adjusts the seat lifting mechanism 5 until the seat cushion 6 reaches a suitable height;

[0082] S4, the user manually adjusts the armrest adjustment mechanism 4 until the top reaches a suitable height for both hands to rest on;

[0083] S5, the user controls the motion state of the wheelchair motion mechanism 2 by manual operation to realize the forward, backward and steering functions of the wheelchair, so that the wheelchair reaches the designated position;

[0084] S6, the user adjusts the wheelchair movement mechanism 2 to the movement locking state to fix the wheelchair in place;

[0085] S7. Everything is ready, and the user starts taking a bath.

[0086] Obviously, the operation sequence of the above steps S1 to S5 is not unique, and the user needs to freely combine the sequence and number of times according to his own needs.

[0087] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multifunctional bathing wheelchair with autonomous lifting and transfer, characterized in that: include A wheelchair main body (1) is provided with a seat cushion (6) on the top thereof for carrying a bather; The wheelchair movement mechanism (2) is symmetrically arranged on both sides of the wheelchair main body mechanism (1) and is used for the bather to manually and autonomously control the movement state of the bathing wheelchair; A backrest adjustment mechanism (3) is arranged at the rear of the wheelchair main body mechanism (1) and is used for the bather to manually and autonomously adjust the back rest position; The armrest adjustment mechanism (4) is symmetrically arranged on both sides of the top of the wheelchair main body mechanism (1) and is used for the bather to manually and autonomously adjust the height of the armrests; And a seat lifting mechanism (5) is arranged inside the wheelchair main body mechanism (1) and is used for the bather to manually and autonomously adjust the height of the seat cushion (6).

2. The multifunctional bathing wheelchair capable of autonomous lifting and transfer according to claim 1, characterized in that: The wheelchair main body structure (1) comprises a wheelchair body bracket (104) symmetrically arranged on the left and right sides, a main body support curved rod (102) fixedly arranged between the tops of the two wheelchair body brackets (104), and a footrest (101) arranged between the front bottoms of the two wheelchair body brackets (104). A front caster (103) is arranged at the front bottom end of each wheelchair body bracket (104), and the seat cushion (6) is located above the two main body support curved rods (102).

3. The multifunctional bathing wheelchair capable of autonomous lifting and transfer according to claim 2, characterized in that: The wheelchair movement mechanism (2) comprises a wheelchair main wheel (201) rotatably arranged at the bottom of the rear side of the wheelchair body support (104), a large ratchet wheel I (202) and a large ratchet wheel II (203) respectively fixedly connected to the end surfaces of both sides of the wheelchair main wheel (201) and having opposite stepping directions, and a double ratchet rocker assembly (204) rotatably arranged at the top of the front side of the wheelchair body support (104), wherein the power output end of the double ratchet rocker assembly (204) is respectively meshedly connected with the large ratchet wheel I (202) and the large ratchet wheel II (203).

4. The multifunctional bathing wheelchair capable of autonomous lifting and transfer according to claim 3, characterized in that: The double-pawl rocker assembly (204) comprises a handle sleeve (2041) rotatably connected to the wheelchair body support (104), a rotating handle (2042) fixedly arranged at the top of the handle sleeve (2041), and a pawl positioning assembly arranged on both sides of the handle sleeve (2041) and symmetrically centered about the center line of the handle sleeve (2041); The pawl positioning assembly comprises a pawl (2043) rotatably arranged at the bottom end of the handle sleeve (2041), a bent rod (2044) rotatably arranged at the top end of the handle sleeve (2041), and a slider baffle (2047) movably embedded in one side of the handle sleeve (2041); the free end of the pawl (2043) is hinged to the same side end of the bent rod (2044) through a long connecting rod (2045); the other end of the bent rod (2044) is provided with a slider baffle (2047) movably embedded in the slider. A small roller (2046) is arranged in the block baffle (2047); a locking groove is provided on one side of the bottom of the handle cover (2041); a slot rod (2048) is fixedly arranged at the bottom end of the slider baffle (2047); the bottom end of the slot rod (2048) is slidably arranged in the locking groove; a spring I (2049) is connected to one side of the bottom end of the slider baffle (2047); and the other end of the spring I (2049) is fixedly connected to the side of the handle cover (2041).

5. The multifunctional bathing wheelchair capable of autonomous lifting and transfer according to claim 4, characterized in that: A through pin insertion hole (20411) is arranged on the side wall of the handle sleeve (2041), and a pin locking insertion hole which can be matched with the pin insertion hole (20411) is provided on the wheelchair body support (104). A pin is movably arranged in the pin insertion hole (20411), and the inner side end of the pin can be movably inserted into the pin locking insertion hole.

6. A multifunctional bathing wheelchair capable of autonomous lifting and transfer according to any one of claims 2 to 5, characterized in that: The backrest adjustment mechanism (3) comprises adjustment rod assemblies symmetrically arranged on both sides of the wheelchair main body mechanism (1), and a backrest plate (306) fixedly arranged between the two adjustment rod assemblies. The adjustment rod assembly comprises a handrail (301) rotatably connected to the top of the rear side of the wheelchair body support (104), a telescopic positioning rod assembly (305) rotatably connected to the bottom of the rear side of the wheelchair body support (104), a locking assembly (302) rotatably arranged on the outside of the telescopic positioning rod assembly (305), and a swing handle (303) rotatably arranged on the top of the wheelchair body support (104). The top end of the telescopic positioning rod assembly is rotatably connected to the side of the handrail (301), and the power output end of the swing handle (303) is connected to the power input end of the locking assembly (302) via a Bowden cable (304).

7. The multifunctional bathing wheelchair capable of autonomous lifting and transfer according to claim 6, characterized in that: The telescopic positioning rod assembly (305) comprises an insertion lifting rod (3051), a wrapping lifting rod (3052) movably sleeved on the outside of the insertion lifting rod (3051), and a spring II (3053) sleeved inside the wrapping lifting rod (3052) and located between the insertion lifting rod (3051) and the wrapping lifting rod (3052); a plurality of positioning holes I are provided on the side wall of the insertion lifting rod (3051), and a spring buckle I (3054) is provided in each positioning hole I; a plug-in hole that can be sequentially matched with the positioning hole I is provided on the top side wall of the wrapping lifting rod (3052), and the spring buckle I (3054) can be movably inserted into the plug-in hole; The locking assembly (302) comprises a lever bracket (3021) fixedly arranged on the outside of the wrapped lifting rod (3052), and a small lever (3022) rotatably connected to the lever bracket (3021), wherein an arc-shaped protrusion is fixedly arranged on the inner side of the free end of the small lever (3022), and the arc-shaped protrusion is located in the mating hole.

8. A multifunctional bathing wheelchair capable of autonomous lifting and transfer according to any one of claims 2 to 5, characterized in that: The seat lifting mechanism (5) comprises a lifting platform bottom frame assembly (501) fixedly arranged between the bottoms of two wheelchair body supports (104), a scissor lift assembly (502) connected to the top of the lifting platform bottom frame assembly (501), and a lifting platform top frame assembly (503) connected to the top of the scissor lift assembly (502); a screw nut pair (504) for driving the scissor lift assembly (502) to move up and down is arranged at the bottom of the lifting platform top frame assembly (503); a hand-cranked rotating assembly (505) is arranged at the front side of the bottom of the lifting platform top frame assembly (503); a power output end of the hand-cranked rotating assembly (505) is transmission-connected to a power input end of the screw nut pair (504); and the seat cushion (6) is fixedly connected to the top of the lifting platform top frame assembly (503).

9. The multifunctional bathing wheelchair capable of autonomous lifting and transfer according to claim 8, characterized in that: The hand-cranked rotating assembly (505) comprises a handwheel shaft (5051) horizontally rotatably connected to the front side of the lifting platform top frame assembly (503), a handwheel (5052) movably sleeved on the front end of the handwheel shaft (5051), and a handwheel limiting plate (5053) fixedly arranged on the front side of the lifting platform top frame assembly (503) and movably sleeved on the outside of the handwheel shaft (5051), wherein a limiting slot opening is provided in the handwheel limiting plate (5053), and a limiting plug-in protrusion movably plugged into and matched with the limiting slot is provided on the inner side surface of the handwheel (5052).

10. A multifunctional bathing wheelchair capable of autonomous lifting and transfer according to any one of claims 2 to 5, characterized in that: The armrest adjustment mechanism (4) comprises a fixed plug-in rod (401) fixedly arranged in the wheelchair body support (104), a lifting armrest (402) movably plugged into the top of the fixed plug-in rod (401), and a spring III sleeved in the fixed plug-in rod (401) and located between the fixed plug-in rod (401) and the lifting armrest (402); a plurality of positioning holes II are formed on the side wall of the fixed plug-in rod (401); and a spring buckle II which can be sequentially matched and plugged with the positioning holes II is embedded in the side wall of the lifting armrest (402).

Images