Foldable wheelchair

Abstract

A foldable wheelchair includes a front wheel side vehicle body including a front wheel support frame having front wheels, a rear wheel side vehicle body having rear wheels; the seat supporting part is hinged to the top of the front wheel side vehicle body or the top of the rear wheel side vehicle body; the backrest supporting frame is hinged to the seat supporting part, and in the working state, the bottom of the backrest supporting frame is detachably and fixedly connected with the rear wheel side vehicle body; the foldable wheelchair rotates and swings from the working state in the direction that the included angle between the front wheel side vehicle body, the rear wheel side vehicle body and the backrest supporting frame is reduced to be in the folded state. In the folding state, the bottom of the backrest supporting frame and the rear wheels are grounded at the same time so that the folding wheelchair can stand independently. When the wheelchair is in the folded state, all the components can occupy a small transverse space, the miniaturization of the wheelchair in the folded state can be improved, and the wheelchair can be stored conveniently.

Description

Technical Field

[0001] This application belongs to the field of medical device technology, specifically relating to a foldable wheelchair. Background Technology

[0002] With an aging population and a growing number of people with disabilities, the market demand for wheelchairs, as an important assistive tool, is increasing year by year. While traditional wheelchair designs can meet users' basic functional needs, they have significant shortcomings in terms of portability and storage. Especially in urban living environments with limited space, reducing the floor space occupied by wheelchairs when not in use has become a pressing issue.

[0003] Most existing folding wheelchair designs focus on longitudinal folding, reducing the height and length of the wheelchair by folding the seat and backrest. However, while reducing longitudinal space, this folding method often neglects lateral space. For example, some wheelchairs, although lower in height when folded, do not significantly reduce in width, resulting in them still occupying considerable space in narrow corridors, elevators, or car trunks. Furthermore, some wheelchairs are structurally unstable when folded, easily unfolding and increasing the difficulty of storage and transportation.

[0004] In recent years, some improved foldable wheelchairs have attempted to achieve multi-directional folding through complex mechanical structures. However, these designs often require additional support components to support the folded wheelchair, increasing its weight and cost. Furthermore, the complex operation makes it difficult for users to fold and unfold the wheelchair themselves. In addition, the complex structure increases the failure rate, affecting the wheelchair's reliability and lifespan. Utility Model Content

[0005] This application provides a foldable wheelchair to solve the technical problems of traditional wheelchairs occupying a lot of lateral space and having a complex structure after being stored.

[0006] The technical solution adopted in this application is as follows:

[0007] A foldable wheelchair includes: a front wheel side body including a front wheel support frame with a front wheel; a rear wheel side body with a rear wheel; a seat support hinged to the top of the front wheel side body or the rear wheel side body; and a backrest support frame hinged to the seat support, wherein in an operational state, the bottom of the backrest support frame is detachably and fixedly connected to the rear wheel side body; the foldable wheelchair is folded by rotating and swinging from the operational state in a direction where the included angle between the front wheel side body, the rear wheel side body, and the backrest support frame decreases; in the folded state, the bottom of the backrest support frame and the rear wheel are simultaneously grounded to make the foldable wheelchair self-standing.

[0008] The foldable wheelchair described in this application also includes the following additional technical features:

[0009] The bottom of the back support frame is also provided with outward support feet. When the foldable wheelchair is in the folded state, it can stand upright by contacting the ground with the rear wheels through the support feet.

[0010] The support leg is equipped with auxiliary wheels, and when the foldable wheelchair is in the folded state, the rear wheels and the auxiliary wheels are in contact with the ground; the top of the support leg has a bearing surface.

[0011] A movable locking element is provided below the seat support. The rear wheel side body includes two spaced-apart support rods and horizontal connecting rods respectively connected to the two support rods. When the foldable wheelchair is in the above state, the locking element is fastened to the horizontal connecting rod to limit the relative displacement between the seat support and the rear wheel side body.

[0012] One of the back support frame and the rear wheel side body is provided with a fixing member, and the other of the two is provided with a locking member adapted to the fixing member. The locking member has a locking position that abuts against the fixing member to limit the rotation and swing of the folding wheelchair, and an unlocking position that is separated from the fixing member. The locking member can switch between the locking position and the unlocking position.

[0013] The fixing member includes a limiting rod installed on the rear wheel side of the vehicle body, and the locking member includes a rotating part rotatably connected to the back support frame, and a locking part abutting the limiting rod when the locking member is in the locked position.

[0014] The foldable wheelchair also includes a control mechanism for moving the locking member from the locked position to the unlocked position. The control mechanism includes a pressing member and a connecting rope connected to the pressing member and the locking member respectively. The pressing member can tighten the connecting rope to move the locking member from the locked position to the unlocked position.

[0015] The back support frame has a protruding handrail at the top and a receiving cavity at the bottom of the handrail for accommodating the pressing member. The pressing member has a pressing surface. When the locking member is in the locked position, the pressing surface is outside the receiving cavity.

[0016] The cavity is provided with a limiting boss, and the limiting boss has a limiting groove. The linkage rope passes through the limiting groove and has a positioning block at its end. The positioning block abuts against the limiting boss. The pressing member has a pressing part on the side opposite to the pressing surface that abuts against the linkage rope.

[0017] The locking part has a guide concave surface with a notch facing the limiting rod when the locking member is in the locked position. The guide concave surface slides with the limiting rod. When the locking member moves from the locked position to the unlocked position, the limiting rod disengages from the end of the guide concave surface.

[0018] The bottom of the back support frame is provided with a first mounting component, the rear wheel side of the vehicle body is provided with a second mounting component, the rotating part rotates around the rotating rod installed on the first mounting component, and the limiting rod is installed on the second mounting component.

[0019] The first mounting component includes two spaced-apart first mounting plates, the second mounting component includes two spaced-apart second mounting plates, the rotating rod is fixedly connected to the two first mounting plates respectively, and the limiting rod is fixedly connected to the two second mounting plates respectively.

[0020] The first mounting component also includes a connecting plate located on top of the two first mounting plates. The connecting plate has a through hole, and the linkage rope passes through the through hole and is connected to the rotating part.

[0021] The foldable wheelchair also includes a folding linkage. The seat support, the front wheel support frame, the folding linkage, and the backrest support frame are sequentially hinged together. The rear wheel side body is hinged to the seat support and the folding linkage respectively.

[0022] The rear wheel side body is provided with a hinge plate and a support seat. The support seat has a support groove. The hinge plate is at least partially located in the support groove. The retraction link is hinged to the hinge plate.

[0023] The front wheel support frame has a front wheel at its bottom. When the foldable wheelchair is in the working state, the front wheel and the rear wheel jointly support the foldable wheelchair, and / or, the folding linkage has a foot pedal at one end of the vehicle body opposite to the rear wheel.

[0024] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0025] 1. The foldable wheelchair of this application has a front wheel side body, a rear wheel side body, a seat support, and a backrest support frame hinged to the seat support. When the wheelchair is in operation, the bottom of the backrest support frame is fixedly connected to the rear wheel side body, preventing the seat support, which is hinged thereto, from rotating relative to the rear wheel side body, thus locking the relative position of the seat support and the backrest support frame. The passenger can sit on the seat support and lean against the backrest support frame, ensuring the passenger's stability. When the wheelchair is no longer in use and needs to be stored, the connection between the backrest support frame and the rear wheel side body is released. At this time, the seat support can rotate relative to the front wheel side body or the rear wheel side body, and rotate towards the backrest support frame until it contacts the backrest support frame. At this time, the included angle between the front wheel side body, the rear wheel side body, and the backrest support frame also decreases continuously as the seat support rotates, so that when the wheelchair is in the folded state, each component occupies less lateral space, which helps to improve the miniaturization of the wheelchair in the folded state and facilitates wheelchair storage.

[0026] Furthermore, since the wheelchair achieves self-support in its folded state by relying on the support frame at the bottom and the rear wheels, there is no need for a separate support component to achieve self-support in the folded state. This optimizes the wheelchair's structural design, saves the space required for a separate support component, and reduces manufacturing costs. Moreover, the wheelchair of this application does not require a wall or additional support frame when folded; it can stand directly on the ground or in a corner of a car trunk, avoiding damage to components or safety hazards caused by tipping over.

[0027] Furthermore, due to changes in the user's environment, wheelchairs often require transportation. Since the wheelchair is self-supporting in its folded state by the support frame and rear wheels, it can further reduce the space occupied by the wheelchair in the lateral storage state, while also improving its portability and facilitating transportation. When wheelchairs need to be transported, they often need to go up and down elevators and vehicles. Therefore, wheelchairs usually have to go through relatively crowded environments such as elevators and transport vehicles. The low lateral space requirement of the wheelchair in this application further reduces its ease of placement in restricted special environments, which helps to reduce the pressure of wheelchair transportation.

[0028] 2. As a preferred embodiment of this application, by providing support feet and achieving joint support for the wheelchair in the folded state through the joint support of the support feet and the rear wheels, the contact area between the wheelchair and the ground can be increased. When the wheelchair is in an upright folded state and tends to tilt under the action of external force, the mutual support force between the support feet and the ground can offset part of the external force on the wheelchair, thereby keeping the wheelchair relatively stable and improving the stability of the wheelchair.

[0029] 3. In a preferred embodiment of this application, the rear wheel side body is configured to include a support rod and a horizontal connecting rod. The support rod and horizontal connecting rod enhance the structural strength of the rear wheel side body, thereby increasing the overall strength of the wheelchair. Simultaneously, when the wheelchair is folded, the locking element under the seat support can engage with the horizontal connecting rod to stabilize the relative position of the seat support and the rear wheel side body, improving the wheelchair's resistance to external forces in the folded state, thus enhancing its self-stability. Furthermore, placing the locking element under the seat support reduces its footprint on the wheelchair's external space, and the seat support provides some concealment of the locking element, contributing to wheelchair miniaturization while enhancing the user's sensory experience.

[0030] 4. In a preferred embodiment of this application, the cooperation between the fixing member and the locking member restricts the relative swaying between the back support frame and the rear wheel side body when the wheelchair is in operation, thus improving the stability of the wheelchair in operation. Furthermore, when the wheelchair is finished using and needs to be folded for storage, releasing the relative locking of the fixing member and the locking member disconnects the connection between the back support frame and the rear wheel side body, allowing the wheelchair to be folded and stored. In other words, by setting the fixing member and the locking member, on the one hand, the structural stability of the wheelchair in operation is guaranteed; on the other hand, it enables quick disconnection of the connection between the back support frame and the rear wheel side body, increasing the ease of folding the wheelchair.

[0031] 5. In a preferred embodiment of this application, the locking of the fixing member and the locking member is achieved by setting a limiting rod and a rotating part. The wheelchair can be switched between the working state and the folded state simply by rotating the rotating part to abut against the limiting rod or to disengage from the limiting rod. This makes it easier for the locking member to abut or separate from the fixing member, and improves the smoothness of the wheelchair switching between the working state and the folded state.

[0032] 6. As a preferred embodiment of this application, the control mechanism is designed so that when folding the wheelchair, the operator can switch the locking mechanism to the locked position by operating the pressing part, which is driven by the linkage rope; that is, before folding and storing the wheelchair, the operator can operate the locking mechanism without bending over to touch the bottom locking mechanism, which greatly improves the operator's convenience and helps to improve the folding efficiency of the wheelchair.

[0033] 7. As a preferred embodiment of this application, since wheelchair users are usually elderly or frail individuals or disabled persons with limited mobility, they usually need someone to accompany them when going out. The outward-protruding armrests at the top of the backrest frame provide a support position for the user, making it easy for the companion to hold the armrests for assistance in moving forward. On the other hand, the cavity on the armrests also provides installation space for the pressing component. The pressing surface is located outside the cavity, making it easy for the user to press the pressing surface to drive the locking mechanism, further increasing the convenience for the user when folding and storing the wheelchair. Attached Figure Description

[0034] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0035] Figure 1 This is a side view of a wheelchair switching between working and folded states according to one embodiment of this application. Figure 1 :

[0036] Figure 2 This is a side view of a wheelchair switching between working and folded states according to one embodiment of this application. Figure 2 :

[0037] Figure 3 This is a side view of the wheelchair in a folded state according to one embodiment of this application:

[0038] Figure 4 This is a schematic diagram of the wheelchair portion structure according to one embodiment of this application. Figure 1 ;

[0039] Figure 5 This is a schematic diagram of the wheelchair portion structure according to one embodiment of this application. Figure 2 ;

[0040] Figure 6 for Figure 5 Enlarged view of part A;

[0041] Figure 7 This is a schematic diagram of the wheelchair portion structure according to one embodiment of this application. Figure 3 ;

[0042] Figure 8 for Figure 7 Enlarged view of part B;

[0043] Figure 9 for Figure 7 Enlarged view of part C;

[0044] Figure 10 This is a schematic diagram of the wheelchair portion structure according to one embodiment of this application. Figure 4 ;

[0045] Figure 11 for Figure 10 Enlarged view of part D.

[0046] in:

[0047] 1. Front wheel support frame; 11. Front wheels;

[0048] 2. Rear wheel side body, 21. Rear wheel, 22. Support rod, 23. Horizontal connecting rod, 24. Second mounting piece, 241. Second mounting plate, 25. Hinge plate, 26. Support seat;

[0049] 3. Seat support, 31. Locking components;

[0050] 4 Back support frame, 41 Support leg, 411 Auxiliary wheel, 42 Handrail, 43 First mounting component, 431 First mounting plate, 432 Connecting plate;

[0051] 5 limit rods;

[0052] 6 locking parts, 61 rotating parts, 62 locking parts, 621 guide concave surfaces;

[0053] 7. Pressing element; 71. Pressing surface; 72. Pressing part;

[0054] 8 connecting ropes, 81 positioning blocks;

[0055] 9 limiting bosses, 91 limiting grooves;

[0056] 10. Rotating rod;

[0057] 110 retraction linkage, 1101 foot pedal. Detailed Implementation

[0058] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0059] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0060] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0061] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0062] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0063] like Figures 1 to 3 As shown, a foldable wheelchair includes: a front wheel side body 11, including a front wheel support frame 11 with the front wheel 11; a rear wheel side body 2, having a rear wheel 21; a seat support 3, hinged to the top of the front wheel side body 11 or the rear wheel side body 2; and a backrest support frame 4 hinged to the seat support 3. In the working state, the bottom of the backrest support frame 4 is detachably and fixedly connected to the rear wheel side body 2. The foldable wheelchair rotates and swings from the working state to a folded state by the angle between the front wheel side body 11, the rear wheel side body 2, and the backrest support frame 4 decreasing. In the folded state, the bottom of the backrest support frame 4 and the rear wheel 21 are simultaneously grounded to make the foldable wheelchair stand upright.

[0064] The foldable wheelchair of this application has a front wheel side body 11, a rear wheel side body 2, a seat support 3, and a backrest support frame 4 hinged to the seat support 3. When the wheelchair is in operation, the bottom of the backrest support frame 4 is fixedly connected to the rear wheel side body 2, preventing the seat support 3 from rotating relative to the rear wheel side body 2, thus locking the relative position of the seat support 3 and the backrest support frame 4. The passenger can sit on the seat support 3 and lean against the backrest support frame 4, ensuring the passenger's stability. When the wheelchair is no longer in use, it needs to be folded up. When storing the wheelchair, disconnect the backrest support frame 4 from the rear wheel side body 2. At this time, the seat support 3 can rotate relative to the front wheel 11 side body or the rear wheel side body 2, and rotate towards the backrest support frame 4 until it contacts the backrest support frame 4. At this time, the included angle between the front wheel 11 side body, the rear wheel side body 2 and the backrest support frame 4 also decreases continuously as the seat support 3 rotates. This allows each component to occupy less lateral space when the wheelchair is in the folded state, which helps to improve the miniaturization of the wheelchair in the folded state and facilitates wheelchair storage.

[0065] Furthermore, since the wheelchair achieves self-support in its folded state by relying on the bottom of the back support frame 4 and the rear wheels 21, there is no need for a separate support component to achieve self-support in the folded state. This optimizes the wheelchair's structural design, saves the space required for a separate support component, and reduces the manufacturing cost of the wheelchair. Moreover, the wheelchair of this application does not require a wall or additional support frame when folded; it can stand directly on the ground or in the corner of a car trunk, avoiding damage to components or safety hazards caused by tipping over.

[0066] Furthermore, due to changes in the user's environment, wheelchairs often require transportation. Since the wheelchair is self-supporting in its folded state by the support frame 4 and the rear wheels 21, the self-supporting state of the wheelchair can further reduce the space occupied by the lateral storage, while also improving the portability of the wheelchair and facilitating transportation. When wheelchair transportation is required, it often involves the wheelchair going up and down elevators and getting on and off vehicles. Therefore, the wheelchair usually needs to go through relatively crowded environments such as elevators and transportation vehicles. The low requirement for lateral space of the wheelchair in this application further reduces its convenience of placement in restricted special environments, which helps to reduce the pressure of wheelchair transportation.

[0067] As a preferred embodiment of this application, such as Figure 3As shown, the bottom of the back support frame 4 is also provided with outward-facing support feet 41. When the foldable wheelchair is in the folded state, it can achieve self-standing by contacting the ground with the rear wheels 21 through the support feet 41. By setting up support feet 41, and achieving joint support for the wheelchair in the folded state through the support feet 41 and the rear wheels 21, the contact area between the wheelchair and the ground can be increased. When the wheelchair is in the self-standing folded state and tends to tilt under the action of external force, the mutual support force between the support feet 41 and the ground can offset part of the external force on the wheelchair, thereby keeping the wheelchair relatively stable and improving the stability of the wheelchair's self-standing.

[0068] Preferably, when the wheelchair is in operation, the support leg 41 is located in the space between the seat support 3 and the rear wheel side body 2. This arrangement enables the support leg 41 to be concealed in the wheelchair during operation, reducing the space occupied by the support leg 41 on the outer side of the wheelchair and contributing to the miniaturization of the wheelchair during operation.

[0069] As a preferred embodiment of this implementation, such as Figure 3 As shown, the support foot 41 is equipped with auxiliary wheels 411. When the foldable wheelchair is in the folded state, the rear wheel 21 and the auxiliary wheels 411 contact the ground. The top of the support foot 41 has a bearing surface. When the wheelchair is in the folded state, the auxiliary wheels 411 and the rear wheels 21 jointly support the wheelchair, facilitating the user's movement of the wheelchair in the folded state, thus facilitating the transfer of the wheelchair in the folded state. In addition, the bearing surface on the top of the support foot 41 can serve as a storage and support surface when the wheelchair is in the working state, helping to optimize the user experience. Preferably, a support frame is provided on the bearing surface for placing miscellaneous items.

[0070] As a preferred example in this embodiment, such as Figure 4 As shown, a movable locking member 31 is provided below the seat support 3. The rear wheel side body 2 includes two spaced support rods 22 and a horizontal connecting rod 23 connected to the two support rods 22 respectively. When the foldable wheelchair is in the state, the locking member 31 is fastened to the horizontal connecting rod 23 to limit the relative displacement between the seat support 3 and the rear wheel side body 2.

[0071] The rear wheel side body 2 is configured to include a support rod 22 and a horizontal connecting rod 23. The support rod 22 and horizontal connecting rod 23 enhance the structural strength of the rear wheel side body 2, thereby increasing the overall strength of the wheelchair. Simultaneously, when the wheelchair is folded, the locking element 31 below the seat support 3 can engage with the horizontal connecting rod 23 to stabilize the relative position of the seat support 3 and the rear wheel side body 2. This improves the wheelchair's resistance to external forces in the folded state, thereby enhancing its self-stability and preventing accidental unfolding or displacement during movement or storage. Furthermore, placing the locking element 31 below the seat support 3 reduces its footprint on the wheelchair's external space, and the seat support 3 provides some concealment of the locking element 31, contributing to wheelchair miniaturization and enhancing the user's sensory experience.

[0072] Preferably, the locking element 31 can be a simple mechanical latch that automatically engages with the horizontal link 23 when the wheelchair is folded into place, thereby achieving a lock. Alternatively, a spring-loaded locking mechanism can be used to provide additional locking force and further improve stability. Alternatively, the locking element 31 can be rotatably connected to the seat support 3; when the wheelchair is in the folded state, the locking element 31 can be rotated to engage with the horizontal link 23.

[0073] As a preferred embodiment of this application, such as Figure 5 , Figure 6 As shown, one of the back support frame 4 and the rear wheel side body 2 is provided with a fixing member, and the other of the two is provided with a locking member 6 adapted to the fixing member. The locking member 6 has a locking position that abuts against the fixing member to limit the rotation and swing of the folding wheelchair, and an unlocking position that is separated from the fixing member. The locking member 6 can switch between the locking position and the unlocking position.

[0074] The cooperation between the fixing component and the locking component 6 restricts the relative swaying between the backrest support frame 4 and the rear wheel side body 2 during wheelchair operation, thus improving the stability of the wheelchair in operation. Furthermore, when the wheelchair is finished and needs to be folded for storage, releasing the relative lock between the fixing component and the locking component 6 disconnects the connection between the backrest support frame 4 and the rear wheel side body 2, allowing the wheelchair to be folded and stored. In other words, by setting up the fixing component and the locking component 6, the structural stability of the wheelchair in operation is guaranteed; on the other hand, it allows for quick disconnection of the connection between the backrest support frame 4 and the rear wheel side body 2, increasing the ease of folding the wheelchair.

[0075] As a preferred embodiment of this implementation, such as Figure 6As shown, the fixing component includes a limiting rod 5 mounted on the rear wheel side of the vehicle body 2, and the locking component 6 includes a rotating part 61 rotatably connected to the back support frame 4, and a locking part 62 that abuts against the limiting rod 5 when the locking component 6 is in the locked position. The locking of the fixing component and the locking component 6 is achieved by setting the limiting rod 5 and the rotating part 61. Simply rotating the rotating part 61 to abut against the limiting rod 5 or rotating the rotating part 61 to disengage from the limiting rod 5 allows the wheelchair to switch between the working state and the folded state. This makes it easier for the locking component 6 to abut or disengage from the fixing component, improving the smoothness of switching between the working state and the folded state of the wheelchair.

[0076] Preferably, the limiting rod 5 has a cylindrical structure to facilitate sliding engagement with the locking part 62.

[0077] As a preferred example in this embodiment, such as Figure 7 , Figure 8 As shown, the foldable wheelchair also includes a control mechanism for moving the locking member 6 from the locked position to the unlocked position. The control mechanism includes a pressing member 7 and a connecting rope 8 connected to both the pressing member 7 and the locking member 6. The pressing member 7 can tighten the connecting rope 8 to move the locking member 6 from the locked position to the unlocked position. This control mechanism allows the operator to switch the locking member 6 to the locked position by operating the pressing member 7, driven by the connecting rope 8, when folding the wheelchair. In other words, before folding the wheelchair, the operator can operate the locking member 6 without bending over to touch it, significantly improving the operator's convenience and contributing to increased folding efficiency.

[0078] Specifically, one end of the linkage rope 8 is connected to the pressing component 7, and the other end is connected to the locking component 6. When the pressing component 7 is pressed down, the linkage rope 8 tightens, causing the locking component 6 to move from the locked position to the unlocked position, completing the folding or unfolding operation of the wheelchair. This design not only improves the ease of use of the wheelchair but also enhances its stability and reliability.

[0079] As a preferred approach in this example, such as Figure 7 , Figure 8 As shown, a protruding handrail 42 is provided on the top of the back support frame 4, and a receiving cavity for accommodating the pressing member 7 is provided at the bottom of the handrail 42. The pressing member 7 has a pressing surface 71. When the locking member 6 is in the locked position, the pressing surface 71 is located outside the receiving cavity.

[0080] Since wheelchair users are usually elderly, frail, or disabled individuals with limited mobility, they typically require accompaniment when going out. The protruding armrest 42 at the top of the backrest frame provides a support position for the user, allowing the companion to hold the armrest 42 for assistance. Furthermore, the recessed design on the armrest 42 provides installation space for the pressing component 7. The pressing surface 71 is located outside the recessed area, making it easy for the user to press the pressing surface 71 to activate the locking mechanism, further enhancing the convenience of folding and storing the wheelchair. By providing a protruding armrest 42 at the top of the backrest support frame 4 and a recessed area at the bottom of the armrest 42 for accommodating the pressing component 7, the pressing component 7 becomes more convenient to use. Specifically, the pressing component 7 has a pressing surface 71. When the locking component 6 is in the locked position, the pressing surface 71 is located outside the recessed area. This design makes it easier for the user to locate and operate the pressing component 7, thereby unlocking the locking component 6.

[0081] Preferably, the pressing element 7 is made of an elastic material to improve comfort and feel during pressing. The receiving cavity is manufactured by injection molding or other processing methods to ensure a good fit with the pressing element 7. In addition, the pressing surface 71 of the pressing element 7 has an anti-slip texture to prevent fingers from slipping during use and increase operational stability.

[0082] As a preferred solution under this approach, such as Figure 8 As shown, a limiting boss 9 is provided in the cavity, and a limiting groove 91 is provided in the limiting boss 9. The linkage rope 8 passes through the limiting groove 91 and has a positioning block 81 at its end. The positioning block 81 abuts against the limiting boss 9. The pressing member 7 has a pressing part 72 on the side away from the pressing surface 71 that abuts against the linkage rope 8.

[0083] To achieve portability and stability in the folding wheelchair, this design incorporates a limiting boss 9 and a limiting groove 91 within the receiving cavity. This allows the connecting rope 8 to pass through the limiting groove 91 and has a positioning block 81 at its end, ensuring the fixing and stability of the connecting rope 8. The pressing member 7 has a pressing part 72 on its side opposite the pressing surface 71, which abuts against the connecting rope 8. Operating the pressing member 7 allows control of the connecting rope 8, thereby unlocking and locking the locking member 6. The limiting boss 9 and limiting groove 91 ensure the connecting rope 8 can stably pass through the receiving cavity and abut against the limiting boss 9 via the positioning block 81, guaranteeing the stability of the connecting rope 8 during operation. The abutment design between the pressing member 7 and the connecting rope 8 allows the user to control the tightening or loosening of the connecting rope 8 by pressing the pressing member 7, thus operating the locking member 6. This design not only ensures ease of operation but also improves the overall stability and reliability of the wheelchair.

[0084] As another preferred example under this embodiment, such as Figure 6As shown, the locking part 62 has a guide concave surface 621 that faces the limiting rod 5 when the locking member 6 is in the locked position. The guide concave surface 621 slides with the limiting rod 5. When the locking member 6 moves from the locked position to the unlocked position, the limiting rod 5 disengages from the end of the guide concave surface 621. The design of the guide concave surface 621 of the locking part 62 allows the limiting rod 5 to slide and disengage smoothly. This design helps to achieve smooth operation during folding and unfolding, and allows the back support frame 4 to separate from the rear wheel side body 2 more smoothly, which helps to improve the smoothness of wheelchair folding.

[0085] Preferably, the guide concave surface 621 has an arc-shaped or inclined structure to facilitate smooth sliding of the limiting rod 5 during the movement of the locking member 6. Furthermore, the guide concave surface 621 is made of a wear-resistant material to improve its service life and reliability.

[0086] As a preferred approach in this example, such as Figure 9 As shown, a first mounting component 43 is provided at the bottom of the back support frame 4, and a second mounting component 24 is provided on the rear wheel side of the vehicle body 2. The rotating part 61 rotates around the rotating rod 10 installed on the first mounting component 43, and the limiting rod 5 is installed on the second mounting component 24.

[0087] The first mounting member 43 and the second mounting member 24 provide mounting positions for the fixing member and the locking member 6, respectively. The rotating part 61 of the locking member 6 rotates around the rotating rod 10 mounted on the first mounting member 43, allowing it to smoothly engage or disengage from the limiting rod 5, thereby improving the smoothness of wheelchair folding. Preferably, the first mounting member 43 is bolted to the back support frame 4, and the second mounting member 24 is bolted to the rear wheel side body 2.

[0088] As a preferred solution under this approach, such as Figure 9As shown, the first mounting component 43 includes two spaced-apart first mounting plates 431, and the second mounting component 24 includes two spaced-apart second mounting plates 241. The rotating rod 10 is fixedly connected to both first mounting plates 431, and the limiting rod 5 is fixedly connected to both second mounting plates 241. The fixed connection of both ends of the rotating rod 10 to the two first mounting plates 431 helps to improve the structural strength of the first mounting component 43 and makes the connection between the rotating rod 10 and the first mounting component 43 more stable. Similarly, the fixed connection of both ends of the limiting rod 5 to the two second mounting plates 241 helps to improve the structural strength of the second mounting component 24 and makes the connection between the limiting rod 5 and the second mounting component 24 more stable. Specifically, the first mounting plate 431 is provided with first mounting holes respectively, and the two ends of the rotating rod 10 are respectively inserted into the two first mounting plates 431 to achieve connection with the first mounting plate 431; the second mounting plate 241 is provided with second mounting holes respectively, and the two ends of the limiting rod 5 are respectively inserted into the two second mounting plates 241 to achieve connection with the second mounting plate 241.

[0089] Furthermore, such as Figure 9 As shown, the first mounting component 43 also includes a connecting plate 432 located on top of the two first mounting plates 431. The connecting plate 432 has a through hole, through which the linkage rope 8 passes and is connected to the rotating part 61. The connecting plate 432 connects the two first mounting plates 431 into a whole, improving the structural strength of the first mounting component 43. At the same time, the connecting plate 432 also provides a passage for the linkage rope 8, preventing it from shifting and helping to improve the working stability of the linkage rope 8.

[0090] As a preferred embodiment of this application, such as Figure 10 As shown, the foldable wheelchair also includes a folding linkage 110. The seat support 3, front wheel support frame 11, folding linkage 110, and backrest support frame 4 are sequentially hinged together. The rear wheel side body 2 is hinged to the seat support 3 and the folding linkage 110. The seat support 3, front wheel support frame 11, folding linkage 110, and backrest support frame 4 together form a four-bar linkage. When the wheelchair is in operation, since the backrest support frame 4, which is hinged to the seat support 3, is fixed in relative position to the rear wheel side body 2, the seat support 3 and the rear wheel side body 2 cannot rotate relative to each other. The four-bar linkage remains stable, and the seat support 3 can stably support the passenger. When the wheelchair needs to be folded and stored, the connection between the backrest support frame 4 and the rear wheel side body 2 is released. At this time, the four-bar linkage is unrestricted and can rotate freely. As the seat support 3 folds closer to the backrest support frame 4, the folding linkage 110 and the front wheel support frame 11 also fold, greatly improving the convenience of wheelchair folding. The operator can fold and store the wheelchair by holding the backrest support frame 4 and the seat support 3 with both hands, optimizing the user experience.

[0091] As a preferred embodiment of this implementation, such as Figure 11 As shown, the rear wheel side body 2 is provided with a hinge plate 25 and a support seat 26. The support seat 26 has a support groove, and the hinge plate 25 is at least partially located within the support groove. The retracting connecting rod 110 is hinged to the hinge plate 25. Hinging the hinge plate 25 to the retracting connecting rod reduces the number of hinge holes on the rear wheel side body 2, which helps improve the structural strength of the rear wheel side body 2. Furthermore, the hinge point with the rear wheel side body 2 can be adjusted by adjusting the length of the hinge plate 25 and the position of the hinge holes on the hinge plate 25. In addition, the support seat 26 supports the hinge plate 25, reducing the load on the hinge plate 25. The support groove on the support seat 26 also provides a certain degree of restraint for the hinge plate 25, preventing it from shifting due to eccentric forces or other factors.

[0092] As a preferred example in this embodiment, such as Figure 1 As shown, the front wheel support frame 11 has a front wheel 11 at its bottom. When the foldable wheelchair is in operation, the front wheel 11 and the rear wheel 21 work together to support the foldable wheelchair. The spaced front wheel 11 and rear wheel 21 work together to support the wheelchair and drive its movement, ensuring the stability of the wheelchair in operation.

[0093] As another preferred example under this embodiment, such as Figure 10 As shown, a footrest 1101 is provided at one end of the retraction linkage 110 opposite to the rear wheel side of the vehicle body 2. The footrest 1101 provides a place for the passenger's feet, which helps to improve the passenger's riding experience.

[0094] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0095] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0096] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A foldable wheelchair, comprising: The front wheel side body includes a front wheel support frame with the front wheels: The rear wheel side body has rear wheels; The seat support is hinged to the top of the front wheel side body or the rear wheel side body; And a backrest support frame hinged to the seat support, wherein in the working state, the bottom of the backrest support frame is detachably and fixedly connected to the rear wheel side of the vehicle body; Its characteristics are, The foldable wheelchair rotates and swings from its working state to a folded state by the direction in which the included angle between the front wheel side body, the rear wheel side body, and the back support frame decreases; In the folded state, the bottom of the back support frame and the rear wheels are simultaneously grounded to make the folded wheelchair stand upright.

2. The foldable wheelchair according to claim 1, characterized in that, The bottom of the back support frame is also provided with outward support feet. When the foldable wheelchair is in the folded state, it can stand upright by contacting the ground with the rear wheels through the support feet.

3. The foldable wheelchair according to claim 2, characterized in that, The support leg is equipped with auxiliary wheels, and when the foldable wheelchair is in the folded state, the rear wheels and the auxiliary wheels are in contact with the ground; the top of the support leg has a bearing surface.

4. The foldable wheelchair according to any one of claims 2 or 3, characterized in that, A movable locking element is provided below the seat support. The rear wheel side body includes two spaced-apart support rods and horizontal connecting rods respectively connected to the two support rods. When the foldable wheelchair is in the above state, the locking element is fastened to the horizontal connecting rod to limit the relative displacement between the seat support and the rear wheel side body.

5. The foldable wheelchair according to claim 1, characterized in that, One of the back support frame and the rear wheel side body is provided with a fixing member, and the other of the two is provided with a locking member adapted to the fixing member. The locking member has a locking position that abuts against the fixing member to limit the rotation and swing of the folding wheelchair, and an unlocking position that is separated from the fixing member. The locking member can switch between the locking position and the unlocking position.

6. The foldable wheelchair according to claim 5, characterized in that, The fixing member includes a limiting rod installed on the rear wheel side of the vehicle body, and the locking member includes a rotating part rotatably connected to the back support frame, and a locking part abutting the limiting rod when the locking member is in the locked position.

7. The foldable wheelchair according to claim 6, characterized in that, The foldable wheelchair also includes a control mechanism for moving the locking member from the locked position to the unlocked position. The control mechanism includes a pressing member and a connecting rope connected to the pressing member and the locking member respectively. The pressing member can tighten the connecting rope to move the locking member from the locked position to the unlocked position.

8. The foldable wheelchair according to claim 7, characterized in that, The back support frame has a protruding handrail at the top and a receiving cavity at the bottom of the handrail for accommodating the pressing member. The pressing member has a pressing surface. When the locking member is in the locked position, the pressing surface is outside the receiving cavity.

9. The foldable wheelchair according to claim 8, characterized in that, The cavity is provided with a limiting boss, and the limiting boss has a limiting groove. The linkage rope passes through the limiting groove and has a positioning block at its end. The positioning block abuts against the limiting boss. The pressing member has a pressing part on the side opposite to the pressing surface that abuts against the linkage rope.

10. The foldable wheelchair according to claim 6, characterized in that, The locking part has a guide concave surface with a notch facing the limiting rod when the locking member is in the locked position. The guide concave surface slides with the limiting rod. When the locking member moves from the locked position to the unlocked position, the limiting rod disengages from the end of the guide concave surface.

11. The foldable wheelchair according to claim 7, characterized in that, The bottom of the back support frame is provided with a first mounting component, the rear wheel side of the vehicle body is provided with a second mounting component, the rotating part rotates around the rotating rod installed on the first mounting component, and the limiting rod is installed on the second mounting component.

12. The foldable wheelchair according to claim 11, characterized in that, The first mounting component includes two spaced-apart first mounting plates, the second mounting component includes two spaced-apart second mounting plates, the rotating rod is fixedly connected to the two first mounting plates respectively, and the limiting rod is fixedly connected to the two second mounting plates respectively.

13. The foldable wheelchair according to claim 12, characterized in that, The first mounting component also includes a connecting plate located on top of the two first mounting plates. The connecting plate has a through hole, and the linkage rope passes through the through hole and is connected to the rotating part.

14. The foldable wheelchair according to claim 1, characterized in that, The foldable wheelchair also includes a folding linkage. The seat support, the front wheel support frame, the folding linkage, and the backrest support frame are sequentially hinged together. The rear wheel side body is hinged to the seat support and the folding linkage respectively.

15. The foldable wheelchair according to claim 14, characterized in that, The rear wheel side body is provided with a hinge plate and a support seat. The support seat has a support groove. The hinge plate is at least partially located in the support groove. The retraction link is hinged to the hinge plate.

16. The foldable wheelchair according to any one of claims 14 or 15, characterized in that, The front wheel support frame has a front wheel at its bottom. When the foldable wheelchair is in the working state, the front wheel and the rear wheel jointly support the foldable wheelchair, and / or, the folding linkage has a foot pedal at one end of the vehicle body opposite to the rear wheel.

Images