An adjustable wheelchair

Abstract

The application relates to an adjustable wheelchair, which comprises a main seat plate, an auxiliary seat plate, an extension mechanism, a first fixed rotating shaft, a first locking mechanism and a storage mechanism; the auxiliary seat plate comprises a plurality of booklet-shaped sub-plate blocks which are rolled up, the sub-plate blocks are stored in the storage mechanism, and the storage mechanism is arranged below the left and right sides of the main seat plate; the first fixed rotating shaft is arranged at the left and right sides of the main seat plate and is fixedly connected to the left and right ends of the extension mechanism, and the auxiliary seat plate is connected with the main seat plate by passing around the first fixed rotating shaft; the extension mechanism can be pulled to make the auxiliary seat plates on the two sides be turned to the left and right sides of the main seat plate along the first fixed rotating shaft; and the first locking mechanism is used for fixing the relative position of the inner tube and the outer tube. According to the application, when the width of the wheelchair seat plate cannot adapt to the body shape of an obese patient, the patient can adjust the overall width of the seat plate according to the own needs, so that the seat plate can better adapt to the body shape of the patient and the use comfort is improved.

Description

Technical Field

[0001] This invention relates to the field of medical rehabilitation equipment, and more particularly to an adjustable wheelchair. Background Technology

[0002] Wheelchairs are an important tool for rehabilitation. They are not only a means of transportation for people with physical disabilities and limited mobility, but more importantly, they enable them to exercise and participate in social activities.

[0003] With economic development, the proportion of overweight and obese people is increasing. Most existing wheelchairs cannot be adjusted to fit the user's body size. For patients who need to rely on wheelchairs or be bedridden for extended periods, the lack of exercise increases the likelihood of obesity. Because existing wheelchairs cannot adjust the seat width to fit the user's body size, the comfort of patients using wheelchairs temporarily or long-term is significantly reduced. Custom-made large-size wheelchairs are expensive, and after the patient loses weight, the wheelchair may become mismatched with their body size, resulting in low cost-effectiveness.

[0004] On the other hand, most wheelchair users have difficulty using the toilet, especially when traveling for extended periods. Currently, most wheelchairs on the market do not allow for defecation in the wheelchair, causing great inconvenience to users. Some electric wheelchairs have this function, but they rely on motors and are not fully mechanical, so they cannot guarantee that the patient's defecation needs will still be met when the battery is dead.

[0005] In addition, existing wheelchairs lack ergonomic seat back designs and medical functions such as rehabilitation therapy to help users. Summary of the Invention

[0006] This invention discloses an adjustable wheelchair, which aims to solve the technical problems existing in the prior art.

[0007] The present invention adopts the following technical solution:

[0008] This invention provides an adjustable wheelchair, including a seat, a pair of telescopic mechanisms, a pair of first fixed pivots, a first locking mechanism, and a storage mechanism;

[0009] The seat includes a main seat and an auxiliary seat, which are movably connected. The auxiliary seat is located on the lower left and right sides of the main seat. The auxiliary seat includes several rollable sub-plates shaped like book scrolls. The sub-plates are stored in storage mechanisms located on the lower left and right sides of the main seat.

[0010] The first fixed rotating shafts are respectively set on the left and right sides of the main seat plate and fixed to the left and right ends of the telescopic mechanism. The first fixed rotating shafts are parallel to the rotation axis of the auxiliary seat plate, and the auxiliary seat plate passes around the first fixed rotating shafts and connects to the main seat plate.

[0011] The telescopic mechanism is respectively set on the front and rear sides of the main seat plate. The telescopic mechanism includes an inner tube and an outer tube sleeved on the outside of the inner tube. The two are axially slidably connected. The telescopic mechanism can be pulled so that the auxiliary seat plates on both sides can be flipped to the sides of the main seat plate along the first fixed rotating shaft and be flush with the main seat plate.

[0012] The first locking mechanism is located at the connection between the inner tube and the outer tube, and is used to fix the relative position of the inner tube and the outer tube.

[0013] As a preferred technical solution, a second fixed rotating shaft is provided in the storage mechanism. The second fixed rotating shaft is arranged parallel to the first fixed rotating shaft. The second fixed rotating shaft is fixedly connected to one end of the auxiliary seat plate. A first return spring is sleeved on both ends of the fixed rotating shaft. The first return spring can provide torque to the second fixed rotating shaft for the reset of the auxiliary seat plate.

[0014] As a preferred technical solution, the first locking mechanism includes a rotary locking device disposed on the outer side of one end of the outer tube. The rotary locking device is used to change the inner tube and the outer tube from a clearance fit to an interference fit.

[0015] As a preferred technical solution, it also includes a backrest assembly, which includes a pair of backrest supports and a lining;

[0016] A pair of backrest supports are fixedly connected to both ends of a telescopic mechanism located at the rear, and the distance between the pair of backrest supports can change as the telescopic mechanism extends and retracts.

[0017] One end of the lining is fixed to a backrest bracket, and the other end of the lining is fixed to another backrest bracket in a roll-like manner.

[0018] As a preferred technical solution, the backrest support includes a first backrest support and a second backrest support;

[0019] A sleeve is fitted onto the second backrest bracket. The sleeve can rotate around the second backrest bracket as a rotation axis. One end of the lining is fixed to the sleeve, and the other end of the lining is fixed to the first backrest bracket. A second return spring is also provided between the sleeve and the second backrest bracket. The second return spring is used to provide torque to the sleeve for the lining to return to its original position.

[0020] As a preferred technical solution, a second locking mechanism is provided between the second backrest bracket and the sleeve. The second locking mechanism is used to change the clearance fit between the second backrest bracket and the sleeve to an interference fit.

[0021] As a preferred technical solution, the main seat plate includes a fixed seat plate and two movable seat plates. The movable seat plates are connected to the fixed seat plate by a hinge, and a pin is provided between the two movable seat plates to lock their relative positions.

[0022] A urine and feces containment device is provided under the movable seat, which is exposed when the movable seat is opened.

[0023] As a preferred technical solution, the feces and urine containment device is provided with a first slide rail on the left and right sides, and a second slide rail is provided at the rear of the feces and urine containment device.

[0024] A first support rod is provided between the first slide rail and the movable seat plate, and the first support rod can slide down along the first slide rail when the movable seat plate is opened;

[0025] A second support rod is provided between the first support rod and the second slide rail. The second support rod can move up and down along the second slide rail as the first support rod moves up and down.

[0026] As a preferred technical solution, a lifting plate is fixed at the bottom of the excrement containing device. The lifting plate is set on a third slide rail, which is parallel to the second slide rail. A pulley is provided at the top of the third slide rail. A lifting cable is fixed at one end of the lifting plate, and the lifting cable passes around the pulley and connects to the second support rod.

[0027] As a preferred technical solution, the aforementioned adjustable wheelchair also includes a footrest support, on which an airbag massage device is detachably connected, and the power supply for the airbag massage device is located below the seat.

[0028] The technical solution adopted in this invention can achieve the following beneficial effects:

[0029] (1) This invention provides an adjustable wheelchair. In a preferred embodiment, the wheelchair seat includes a main seat and an auxiliary seat. When the width of the main seat is insufficient for the body shape of an obese patient, the patient can adjust the auxiliary seat to increase the overall width of the seat, better adapting to the patient's body shape and improving comfort. Patients of different body types do not need to purchase multiple wheelchairs of different sizes, reducing financial burden. Furthermore, adjusting the seat size reduces pressure distribution on the patient's body during prolonged sitting, thus reducing the risk of pressure sores. Correspondingly, the width of the wheelchair's backrest can also be adjusted to match the seat width.

[0030] (2) In a preferred embodiment, the main seat of the adjustable wheelchair can be opened and closed, and a urine and feces receiving device is provided under the seat. The seat can be opened and closed manually as needed, so that the patient can control urination and defecation more independently, and does not have to look for a toilet in public places, reducing the number of times the patient needs to move to the toilet or commode, reducing the physical burden on the patient, and improving the patient's personal dignity. Furthermore, after the seat is opened, nursing staff can perform hygiene care and diaper changing more conveniently, reducing the embarrassment and pain between the patient and the nursing staff.

[0031] (3) In a preferred embodiment of the present invention, an airbag massage device can be further provided on the footrest support of the adjustable wheelchair, providing the user with the possibility of massaging their lower limbs at any time when out or at home, reducing the possibility of lower limb deep vein thrombosis after prolonged sitting, and improving the clinical prognosis of patients who sit for long periods of time. The airbag massage device is easy to use and detachable, and users can install or remove it at any time according to their needs, improving the comfort of use. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below, forming part of the present invention. The illustrative embodiments of the present invention and their descriptions explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 This is a schematic diagram of the adjustable wheelchair in a preferred embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the telescopic mechanism and the first fixed rotating shaft in a preferred embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of the seat plate and the telescopic mechanism in a preferred embodiment of the present invention;

[0036] Figure 4 This is a partial enlarged view of the second backrest bracket in a preferred embodiment of the present invention;

[0037] Figure 5 This is a rear view of the excrement-containing device in its initial state according to a preferred embodiment of the present invention.

[0038] Figure 6 This is a front view of the excrement-accommodating device in a preferred embodiment of the present invention when the auxiliary seat plate is opened.

[0039] Figure 7 This is a front view of the excrement-accommodating device in a preferred embodiment of the present invention when the auxiliary seat is fully open.

[0040] Figure 8 This is a schematic diagram of the movable seat plate and the pin in a preferred embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] Main seat plate 1, auxiliary seat plate 2, hinge 3, first fixed pivot 4, storage mechanism 5, second fixed pivot 6, telescopic mechanism 7, first locking mechanism 8, first backrest support 9, second backrest support 10, lining 11, second locking mechanism 12, fixed seat plate 13, movable seat plate 14, pin 15, first slide rail 16, second slide rail 17, first support rod 18, second support rod 19, lifting plate 20, urination / defecation container 21, pulley 22, lifting cable 23, pedal bracket 24, first pin 25, second pin 26. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of this invention, it should be noted that the term "or" is generally used to include the meaning of "and / or," unless otherwise expressly indicated.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0045] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0046] With the increase in the obese population, existing wheelchairs are often not suitable for patients' body shapes. Furthermore, during the recovery period, patients' weight often tends to increase due to reduced activity levels. When the body shape changes too much, the purchased wheelchairs often cannot be adjusted in width, forcing families to purchase a larger wheelchair.

[0047] Furthermore, due to patients' limited mobility, they often require assistance from family members or caregivers to use the toilet, which not only infringes on their privacy but also increases their physical burden. Although existing technologies exist that allow the seat to open to assist patients with urination and defecation, these mechanisms all require motors for operation. This not only increases the weight and purchase cost of the wheelchair but also necessitates regular charging, making it impossible to guarantee the patient's defecation needs when the battery is depleted.

[0048] refer to Figures 1-4 To address the aforementioned issues, in a preferred embodiment of the present invention, an adjustable wheelchair is provided, designed to allow patients to independently adjust the width of the seat according to their needs, in order to accommodate patients of various body types (especially obese individuals).

[0049] The adjustable wheelchair includes a frame, armrests, footrest brackets 24, wheels, backrest assembly, seat, first locking mechanism 8, storage mechanism 5, a pair of telescopic mechanisms 7 and a pair of first fixed pivots 4; wherein the positional relationship of the aforementioned components can be referred to the positional relationship between the components of the wheelchair in the prior art, and will not be repeated here.

[0050] refer to Figure 3 In a preferred embodiment, the seat includes a main seat 1 and an auxiliary seat 2. The auxiliary seat 2 is disposed on the left and right sides of the main seat 1 and is movably connected to it. Preferably, the main seat 1 and the auxiliary seat 2 are movably connected by a hinge or a hinge 3. When not in use, the auxiliary seat 2 is located below the left and right sides of the main seat 1. When in use, it can be rotated to be flush with the main seat 1, so that the overall width of the seat can be adjusted adaptively.

[0051] like Figure 2 Preferably, the main seat plate 1 is provided with a first fixed rotating shaft 4 on the left and right sides respectively. The first fixed rotating shaft 4 is parallel to the rotation axis of the auxiliary seat plate 2. The auxiliary seat plate 2 is movably connected to the main seat plate 1 by passing around the first fixed rotating shaft 4.

[0052] Preferably, the auxiliary seat plate 2 includes several sub-plates, which are connected by hinges or hinges. In the initial state, the auxiliary seat plate 2 is in the shape of a rolled-up book and is stored in the storage mechanism 5 located on the lower left and right sides of the main seat plate 1. The storage mechanism 5 is in the shape of a square box and has a fixed pivot inside, which is defined as the second fixed pivot 6. The second fixed pivot 6 is the rotation axis of the auxiliary seat plate 2. Specifically, when the auxiliary seat plate 2 is rolled up, it is similar to a "toilet paper roll". The structure of the second fixed pivot 6 is similar to the structure of the "toilet paper roll core" used to support and fix the toilet paper roll. The structure of the storage mechanism 5 is similar to the structure of the "toilet paper sleeve" that protects and hides the toilet paper roll core.

[0053] Preferably, the second fixed rotating shaft 6 is arranged parallel to the first fixed rotating shaft 4 to ensure that the auxiliary seat plate 2 can move in accordance with the rotation direction of the first fixed rotating shaft 4 and the second fixed rotating shaft 6, so as not to deviate from the movement trajectory; the second fixed rotating shaft 6 is fixedly connected to one end of the auxiliary seat plate 2, and the two ends of the fixed rotating shaft are fitted with a first return spring, which can provide torque to the second fixed rotating shaft 6 for the reset of the auxiliary seat plate 2.

[0054] Preferably, the two ends of the first return spring are fixed to the second fixed rotating shaft 6 and the storage mechanism 5, respectively. Since the position of the storage mechanism 5 is relatively fixed, the first return spring can provide torque when the second fixed rotating shaft 6 rotates.

[0055] Specifically, the torque provided by the first return spring is directed away from the main seat plate 1, so that when the auxiliary seat plate 2 is not in use, the first return spring can drive the second fixed rotating shaft 6 to rotate away from the main seat plate 1, so that the auxiliary seat plate 2 changes from a horizontal state to a curled state.

[0056] In a preferred embodiment, the telescopic mechanism 7 is disposed below the main seat plate 1 and is located on the front and rear sides. The left and right ends of the telescopic mechanism 7 are respectively fixedly connected to the first fixed rotating shaft 4. The telescopic mechanism 7 and the first fixed rotating shaft 4 form a roughly enclosing rectangle, and the position of the rectangle corresponds to the bottom of the main seat plate 1.

[0057] Preferably, the telescopic mechanism 7 includes an inner tube and an outer tube sleeved thereon, which can slide axially relative to each other. When the telescopic mechanism 7 is pulled, the auxiliary seat plates 2 on both sides flip up along the first fixed pivot 4 to the sides of the main seat plate 1 and become flush with the main seat plate 1. At this time, the overall width of the seat plate is stretched. Specifically, the structure of the telescopic mechanism 7 is similar to that of the telescopic rod, but in order to ensure that its structural strength is sufficient to support the patient's weight, the telescopic mechanism 7 is preferably made of aluminum alloy, titanium alloy, carbon fiber or steel.

[0058] The outer tube and the inner tube are in transition fit or clearance fit. A first locking mechanism 8 is provided at the connection between the two. The first locking mechanism 8 can fix the relative position of the inner tube and the outer tube. The inner tube and the outer tube change from clearance fit / transition fit to interference fit. The auxiliary seat plate 2 no longer rotates upward along the first fixed rotating shaft 4, and the width of the seat plate no longer changes.

[0059] In a preferred embodiment, the first locking mechanism 8 is configured as a rotary locking device. The specific structure of the rotary locking device can be selected from the torque locking mechanism at the connection of the telescopic rod in the prior art. Its structure consists of a rotatable lockable ring / sleeve and a locking device fixed on the outer tube. When it is necessary to lock the inner tube and the outer tube, torque is applied by rotating the locking ring / sleeve and connecting it to the locking device, thereby fixing the length and position of the telescopic mechanism 7. When it is necessary to adjust the length of the telescopic mechanism 7, the locking ring / sleeve is rotated and the connection between it and the locking device is released, and then the length and position of the telescopic mechanism 7 can be freely adjusted.

[0060] In another preferred embodiment, the specific structure of the rotary locking device can be selected from the eccentric locking structure in the telescopic ladder or photography tripod in the prior art. The eccentric locking structure consists of an eccentric wheel and a pressure plate. When it is necessary to lock the telescopic mechanism 7, the eccentric wheel is rotated so that it contacts the pressure plate on the outer tube and pushes it to the outside of the outer tube. In this way, the pressure generated by the eccentric wheel will cause the pressure plate to clamp on the outer tube, thereby realizing the locking of the inner tube and the outer tube.

[0061] Specifically, the torque locking mechanism and eccentric locking structure mentioned above can be directly selected from finished components produced by any manufacturer in the prior art. Since the structures and shapes of finished components produced by different manufacturers are different, more specific and detailed structures are not specified in this embodiment.

[0062] Corresponding to the width adjustment of the seat, the width of the backrest assembly can also be freely adjusted according to actual needs. Preferably, the backrest assembly includes a pair of backrest supports and a lining 11. The lower ends of the pair of backrest supports are respectively fixed to the telescopic mechanism 7 on the rear side of the seat, and the upper ends of the backrest supports are respectively fixed to the armrests. One end of the lining 11 is fixed to one backrest support, and the other end of the lining 11 is fixed to the other backrest support in a roll-like manner. The distance between the backrest supports can change with the extension and retraction of the telescopic mechanism 7, thereby causing the width of the lining 11 to change accordingly.

[0063] like Figure 4 Preferably, the backrest support includes a first backrest support 9 and a second backrest support 10. A sleeve (not shown in the figure) is fitted on the second backrest support 10. The sleeve can rotate around the second backrest support 10 as a rotation axis. One end of the lining 11 is fixed to the sleeve, and the other end of the lining 11 is fixed to the first backrest support 9. A second return spring is also provided between the sleeve and the second backrest support 10. The second return spring is used to provide torque to the sleeve for the return of the lining 11.

[0064] Preferably, the two ends of the second return spring are connected to the second backrest bracket 10 and the sleeve, respectively. Since the relative position of the second backrest bracket 10 is fixed, the second return spring can provide torque when the sleeve rotates around the second backrest bracket 10.

[0065] Specifically, the torque provided by the second return spring is directed away from the first backrest support 9, so that when a wide lining 11 is not used, the second return spring can drive the sleeve to rotate away from the first backrest support 9, so that the lining 11 changes from a flattened state to a curled state.

[0066] Specifically, the lining 11 is initially rolled up in a roll around the sleeve. The structure of the sleeve is similar to that of the "roll core" used to support and fix the toilet paper roll. By rotating the sleeve, the rolled lining 11 can be unfolded flat.

[0067] Preferably, a second locking mechanism 12 is provided between the second backrest bracket 10 and the sleeve. The second locking mechanism 12 is used to change the second backrest bracket 10 and the sleeve from a clearance fit to an interference fit. Preferably, the second locking mechanism 12 is preferably located on the top of the sleeve to facilitate manual operation. Specifically, the specific structure of the second locking mechanism 12 can be the same as that of the first locking mechanism 8, which will not be described in detail here.

[0068] Specifically, in the above preferred embodiments, whether the first return spring drives the second fixed rotating shaft 6 to rotate, thereby driving the auxiliary seat plate 2 to rotate, or the second return spring drives the sleeve to rotate, thereby driving the lining cloth 11 to rotate, the structural principle can refer to the structure of the automatic lever pen in the prior art. The paper roll in the automatic lever pen can rotate based on the return spring and the fixed rotating shaft, and its specific structure will not be described in detail here.

[0069] In a preferred embodiment, an ergonomic backrest and seat cushion are provided on the inner side of the backrest assembly and seat facing the patient. Since the size of the backrest and seat cushion cannot be arbitrarily adjusted, backrest and seat cushions of different sizes can be provided. When the width of the backrest assembly and seat is adjusted, the corresponding backrest and seat cushion can be replaced in time to increase the patient's comfort experience.

[0070] In the above embodiment, when it is necessary to adjust the width of the wheelchair, the first locking mechanism 8 and the second locking mechanism 12 are opened respectively. By stretching the telescopic mechanism 7 outward, the auxiliary seat plate 2 is flipped out of the storage mechanism 5 and aligned with the main seat plate 1, thereby increasing the width of the seat plate. By stretching the second backrest bracket 10 outward, the lining 11 is flipped out of the sleeve, thereby adjusting the width of the backrest assembly. Finally, the first locking mechanism 8 and the second locking mechanism 12 are locked to fix the telescopic mechanism 7 and the backrest assembly, preventing the width from changing again due to pressure during the patient's use of the wheelchair.

[0071] refer to Figures 5-7 In a preferred embodiment of the present invention, the structure of the main seat plate 1 is further improved so that the patient can urinate and defecate at any time and independently without having to go to the toilet or be accompanied by a caregiver.

[0072] Preferably, the main seat plate 1 includes a fixed seat plate 13 and two movable seat plates 14. The fixed seat plate 13 is approximately "U"-shaped, and the movable seat plates 14 are located in the center of the fixed seat plate 13. The movable seat plates 14 and the fixed seat plate 13 are connected by hinges. Each of the two movable seat plates 14 has a through hole on its outer side, and a matching pin 15 is provided in the through hole. The pin 15 is approximately "U"-shaped and is used to lock the position of the two movable seat plates 14. Preferably, a urine and feces containing device 21 is provided below the movable seat plate 14. The urine and feces containing device 21 can be exposed when the movable seat plate 14 is opened. The urine and feces containing device 21 can be a chamber pot, bedpan, or other container that can contain urine and feces.

[0073] Specifically, when a patient needs to urinate or defecate, simply pull out the latch 15, and the two movable seat plates 14 will open naturally, exposing the urine and feces receiving device 21, allowing the patient to use the toilet immediately.

[0074] Preferably, a first slide rail 16 is provided on the left and right sides of the urination and defecation containment device 21, and a second slide rail 17 is provided at the rear of the urination and defecation containment device 21; a first support rod 18 is provided between the first slide rail 16 and the movable seat plate 14, and the first support rod 18 is connected to the movable seat plate 14 by a hinge or a ball cage universal joint. The first support rod 18 can rotate relative to the movable seat plate 14 when it is opened, and slide down along the first slide rail 16 at the same time; a second support rod 19 is provided between the first support rod 18 and the second slide rail 17, and the second support rod 19 can descend along the second slide rail 17 as the first support rod 18 descends.

[0075] Preferably, the first slide rail 16 is fixed to the bottom of the fixed base plate 13, and the second slide rail 17 and the first slide rail 16 can be fixedly connected (not shown in the figure).

[0076] Preferably, a lifting plate 20 is fixed to the bottom of the excrement containing device 21. A slider is fixed to one end of the lifting plate 20. The slider is set on the third slide rail. The lifting plate 20 can slide up and down along the third slide rail. The third slide rail is arranged parallel to the second slide rail 17. A pulley 22 is provided at the top of the third slide rail. A lifting cable 23 is fixed to one end of the lifting plate 20. The lifting cable 23 passes around the pulley 22 and is connected to the second support rod 19.

[0077] When the two movable base plates 14 open naturally, one end of the first support rod 18 rotates relative to the movable base plate 14, and the other end descends along the first slide rail 16, as if... Figure 6 Simultaneously, the second support rod 19 descends along the second slide rail 17. The second support rod 19 is connected to the lifting plate 20 via pulley 22 and lifting cable 23. When the second support rod 19 descends, the lifting cable 23 drives the lifting plate 20 to rise, thereby raising the urination and defecation containment device 21. Figure 7This is to prevent urine and feces from splashing out and to ensure hygiene when using the toilet; after using the toilet, simply close the movable seat 14 manually to trigger the descent of the urine and feces containment device 21.

[0078] Specifically, the weight of an adult's defecation is approximately 100-300g, and the weight of each urination is approximately 200-400g. To ensure that the movable seat 14 does not automatically close due to the increased weight of excrement in the urination / defecation container 21 after it has been naturally opened, its stability is controlled by increasing the weight of the movable seat 14. Preferably, the weight of the two movable seat panels is at least 1kg. More preferably, the specific weight of the movable seat 14 can be adjusted according to the patient's actual physiological / pathological state to prevent it from automatically closing during defecation.

[0079] Alternatively, the weight of the first support rod 18 and / or the second support rod 19 can be increased to prevent the urination and defecation containment device 21 from falling due to excessive weight, thus avoiding the movable seat 14 from closing during toileting.

[0080] refer to Figure 8 Preferably, the latch 15 includes a first pin 25 and a second pin 26. The length of the first pin 25 is shorter than the length of the second pin 26. Correspondingly, the depths of the through holes on the outer sides of the two movable seat plates 14 are also different. When the positions of the two movable seat plates 14 are locked, the latch 15 is fully inserted into the through holes of the movable seat plates 14 to avoid protruding and affecting the patient's sitting posture. When the movable seat plates 14 are released, the latch 15 is pulled out, ensuring that at least the first pin 25 is completely pulled out of the through hole. At this time, the movable seat plates 14 automatically descend, while the second pin 26 remains in the corresponding through hole and can be used as a handle. After using the toilet, the second pin 26 is grasped and rotated upwards to close the movable seat plates 14. Then, the first pin 25 is inserted into the through hole to fix the movable seat plates 14 again.

[0081] In a preferred embodiment, an airbag massage device can be detachably connected to the adjustable wheelchair footrest support 24. The power supply for the airbag massage device is located below the seat, and the patient can install or remove it at any time according to their needs, thus improving the comfort of use.

[0082] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. An adjustable wheelchair, characterized in that, It includes a seat plate, a pair of telescopic mechanisms, a pair of first fixed rotating shafts, a first locking mechanism, and a storage mechanism; The seat plate includes a main seat plate and an auxiliary seat plate, which are movably connected. The auxiliary seat plates are respectively disposed below the left and right sides of the main seat plate. Each auxiliary seat plate includes several book-shaped, rollable sub-plates. The ends of the sub-plates are fixedly connected to a second fixed rotating shaft in the storage mechanism so that they can be stored in the storage mechanism in a rolled-up state. The storage mechanism is respectively disposed below the left and right sides of the main seat plate. The storage mechanism is provided with a first return spring. The two ends of the first return spring are respectively fixed to the storage mechanism and the second fixed rotating shaft and are fixed relative to the storage mechanism. The return spring is used to provide a torque to the second fixed rotating shaft in a direction opposite to that of the main seat plate for the reset of the auxiliary seat plate. The first fixed rotating shaft is respectively disposed on the left and right sides of the main seat plate and fixed to the left and right ends of the telescopic mechanism. The first fixed rotating shaft is parallel to the rotation axis of the auxiliary seat plate, and the auxiliary seat plate passes around the first fixed rotating shaft and is connected to the main seat plate. The telescopic mechanism is respectively disposed on the front and rear sides of the main seat plate. The telescopic mechanism includes an inner tube and an outer tube sleeved on the outside of the inner tube, which are axially slidably connected to each other. The telescopic mechanism can be pulled so that the auxiliary seat plates on both sides can be flipped to the sides of the main seat plate along the first fixed rotating shaft and become flush with the main seat plate. The first locking mechanism is disposed at the connection between the inner tube and the outer tube, and is used to fix the relative position of the inner tube and the outer tube; The main seat includes a fixed seat and two movable seat plates. The movable seat plates are connected to the fixed seat plate by a hinge. A urine and feces containment device is provided under the movable seat plate. The urine and feces containment device can be exposed when the movable seat plate is opened. The urination and defecation containment device is provided with first slide rails on the left and right sides, and a second slide rail is provided at the rear of the urination and defecation containment device; a first support rod is provided between the first slide rail and the movable seat plate, and the first support rod is connected to the movable seat plate by a hinge or a ball cage universal joint. The first support rod can rotate relative to the movable seat plate when the movable seat plate is opened, and slide down along the first slide rail. A second support rod is provided between the first support rod and the second slide rail, and the second support rod can move up and down along the second slide rail along with the lifting and lowering of the first support rod; The bottom of the excrement-containing device is fixed with a lifting plate, which is set on a third slide rail. The third slide rail is parallel to the second slide rail. A pulley is provided at the top of the third slide rail. A lifting cable is fixed to one end of the lifting plate, and the lifting cable passes around the pulley and is connected to the second support rod.

2. The adjustable wheelchair according to claim 1, characterized in that, The second fixed rotating shaft is arranged parallel to the first fixed rotating shaft, and the second fixed rotating shaft is fixedly connected to one end of the auxiliary seat plate.

3. The adjustable wheelchair according to claim 1, characterized in that, The first locking mechanism includes a rotary locking device disposed on the outer side of one end of the outer tube, the rotary locking device being used to change the inner tube and the outer tube from a clearance fit to an interference fit.

4. The adjustable wheelchair according to claim 1, characterized in that, It also includes a backrest assembly, which includes a pair of backrest supports and a lining; A pair of backrest supports are respectively fixed to both ends of the telescopic mechanism located at the rear, and the distance between the pair of backrest supports can change as the telescopic mechanism extends and retracts; One end of the lining is fixed to one of the backrest supports, and the other end of the lining is fixed to another backrest support in a roll-like manner.

5. The adjustable wheelchair according to claim 4, characterized in that, The backrest support includes a first backrest support and a second backrest support; A sleeve is fitted onto the second backrest bracket, and the sleeve can rotate around the second backrest bracket as a rotation axis. One end of the lining is fixed to the sleeve, and the other end of the lining is fixed to the first backrest bracket. A second return spring is also provided between the sleeve and the second backrest bracket. The second return spring is used to provide torque to the sleeve for the reset of the lining.

6. The adjustable wheelchair according to claim 5, characterized in that, A second locking mechanism is provided between the second backrest bracket and the sleeve, which is used to change the second backrest bracket and the sleeve from a clearance fit to an interference fit.

7. The adjustable wheelchair according to claim 1, characterized in that, A pin is provided between the two movable base plates to lock their relative positions.

8. The adjustable wheelchair according to claim 1, characterized in that, It also includes a footrest bracket, on which an airbag massage device is detachably connected, and the power supply for the airbag massage device is located below the seat plate.

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