Foldable wheelchair and folding method thereof

Abstract

The invention discloses a foldable wheelchair and a folding method thereof, and the foldable wheelchair comprises a front wheel side vehicle body which comprises a front wheel supporting frame with front wheels, and a rear wheel side vehicle body which comprises 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] The present application belongs to the technical field of medical devices, and specifically relates to a foldable wheelchair and a folding method thereof. Background Art

[0002] Although the traditional wheelchair design can meet the basic needs of users in terms of functionality, it has significant deficiencies in portability and storage. Especially in urban living environments, where space is limited, how to reduce the floor space occupied by wheelchairs when not in use has become an urgent problem to be solved.

[0003] Most existing foldable wheelchair designs focus on longitudinal folding, that is, reducing the height and length of the wheelchair by folding the seat and backrest. However, while this folding method reduces the longitudinal space, it often ignores the occupation of the lateral space. For example, although the height of some wheelchairs is reduced after folding, the width is not significantly reduced, resulting in a large space in narrow corridors, elevators or car trunks. In addition, some wheelchairs are unstable after folding and are easy to unfold, which increases 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, but these designs often require additional support parts to support the folded wheelchair, which increases the weight and cost of the wheelchair, and is complex to operate, making it difficult for users to fold and unfold the wheelchair themselves. In addition, the complex structure also increases the failure rate, affecting the reliability and service life of the wheelchair. Summary of the invention

[0005] The present application provides a foldable wheelchair and a folding method thereof, so as to solve the technical problem that a traditional wheelchair occupies a large lateral space and has a complex structure after being stored.

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

[0007] A foldable wheelchair comprises: a front wheel side body, comprising a front wheel support frame with a front wheel: a rear wheel side body, comprising a rear wheel; a seat support portion, hinged to the front wheel side body or the top of the rear wheel side body; and a backrest support frame hinged to the seat support portion, wherein in a working state, the bottom of the backrest support frame is detachably fixedly connected to the rear wheel side body; the foldable wheelchair is rotated and swung from the working state to a folded state by the direction in which the 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 allow the foldable wheelchair to be self-standing.

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

[0009] The bottom of the backrest support frame is also provided with outward supporting feet, and when the foldable wheelchair is in a folded state, the supporting feet and the rear wheels can contact the ground to achieve self-standing.

[0010] The support legs are provided with auxiliary wheels, and when the foldable wheelchair is in a folded state, the rear wheels and the auxiliary wheels are in contact with the ground; and the tops of the support legs are provided with bearing surfaces.

[0011] A movable locking member is provided under the seat support portion, and the rear wheel side body includes two support rods arranged at intervals and horizontal connecting rods respectively connected to the two support rods. When the foldable wheelchair is in the stated state, the locking member is buckled on the horizontal connecting rod to limit the relative displacement between the seat support portion and the rear wheel side body.

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

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

[0014] The foldable wheelchair also includes a control mechanism for driving the locking member to move from the locking position to the unlocking position, the control mechanism includes a pressing member and a linkage rope respectively connected to the pressing member and the locking member, and the pressing member can tighten the linkage rope to drive the locking member to move from the locking position to the unlocking position.

[0015] The top of the backrest support frame is provided with an outwardly protruding armrest, and the bottom of the armrest is provided with a receiving cavity for receiving the pressing member. The pressing member has a pressing surface, and when the locking member is in the locking position, the pressing surface is located outside the receiving cavity.

[0016] A limiting boss is provided in the accommodating cavity, a limiting groove is provided in the limiting boss, the linkage rope passes through the limiting groove and a positioning block is provided at the end, the positioning block abuts against the limiting boss, and the pressing member is provided with a pressing portion abutting against the linkage rope on the side away from the pressing surface.

[0017] The locking portion has a guide concave surface that is notched toward the direction of the limit rod when the locking piece is in the locking position. The guide concave surface is slidably matched with the limit rod. When the locking piece moves from the locking position to the unlocking position, the limit rod escapes from the end of the guide concave surface.

[0018] A first mounting member is provided at the bottom of the backrest support frame, a second mounting member is provided on the rear wheel side vehicle body, the rotating part rotates around a rotating rod installed on the first mounting member, and the limiting rod is installed on the second mounting member.

[0019] The first mounting member includes two first mounting plates spaced apart from each other, the second mounting member includes two second mounting plates spaced apart from each other, 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 member further comprises a connecting plate located on the top of the two first mounting plates, the connecting plate is provided with a through hole, the linkage rope is passed through the through hole and is connected to the rotating part.

[0021] The foldable wheelchair also includes a folding connecting rod, the seat support part, the front wheel support frame, the folding connecting rod, and the backrest support frame are hinged in sequence, and the rear wheel side body is hinged to the seat support part and the folding connecting rod respectively.

[0022] The rear wheel side vehicle body is provided with an articulated plate and a supporting seat, the supporting seat is provided with a supporting groove, the articulated plate is at least partially located in the supporting groove, and the folding connecting rod is hinged to the articulated plate.

[0023] The front wheel support frame has a front wheel at the 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 connecting rod is provided with a footrest at one end away from the rear wheel side body.

[0024] The present application also provides a folding method for a foldable wheelchair, which is applied to the foldable wheelchair as described above, the method comprising: a user presses a release button on the handle, triggers the locking member to unlock through a linkage rope, controls the front end of the seat support portion to be lifted upward, separates the backrest support frame from the rear wheel side body, rotates the rear wheel side body and the seat support portion in a direction in which the angle between the two is reduced, and the bottom of the backrest support frame drives the front wheel side body to rotate in a direction in which the angle between the front wheel side body and the seat support portion is reduced through a folding connecting rod to form a folded state of the wheelchair, and locks the rear wheel side body through a locking member to achieve locking of the folded state, flips the footrest upward, and can achieve self-reliance by allowing the support foot to contact the ground with the rear wheel.

[0025] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0026] 1. The foldable wheelchair of the present application comprises a front wheel side body, a rear wheel side body, a seat support part and a back support frame hinged to the seat support part. When the wheelchair is in working state, the bottom of the back support frame is fixedly connected to the rear wheel side body, so that the seat support part hinged thereto cannot rotate relative to the rear wheel side body, so as to realize locking of the relative position of the seat support part and the back support frame; the passenger can sit on the seat support part and lean on the back support frame, so as to provide guarantee for the sitting stability of the passenger; when the wheelchair is finished using and needs to be stored, the connection between the back support frame and the rear wheel side body is released, at which time the seat support part can rotate relative to the front wheel side body or the rear wheel side body, and rotate towards the back support frame until it conflicts with the back support frame, at which time the angle between the front wheel side body, the rear wheel side body and the back support frame is continuously reduced with the rotation of the seat support part, so that when the wheelchair is in folded state, each component can occupy a smaller lateral space, which helps to improve the miniaturization of the wheelchair in the folded state and facilitates the storage of the wheelchair.

[0027] In addition, since the wheelchair can stand on its own when folded by relying on the support of the bottom of the back support frame and the rear wheels, there is no need to set up a separate support for the wheelchair to achieve its self-standing in the folded state, which optimizes the structural design of the wheelchair and saves the space occupied by the separate support, while reducing the manufacturing cost of the wheelchair. Moreover, after being folded, the wheelchair of the present application does not need to lean against a wall or an additional support frame, and can be directly erected on the ground or in the corner of the car trunk to avoid damage to components or safety hazards caused by tipping.

[0028] Furthermore, due to changes in the user's environment, wheelchairs are usually required to be transferred. Since the wheelchair is self-standing in the folded state by relying on the support of the bottom of the back support frame and the rear wheels, the self-standing wheelchair can further reduce the lateral storage space occupied, while also improving the portability of the wheelchair for easy transfer. When the wheelchair needs to be transferred, it is often accompanied by 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 transfer vehicles. The low demand for lateral space of the wheelchair of the present application further reduces its convenience of placement in a restricted special environment, which helps to reduce the pressure of wheelchair transfer.

[0029] 2. As a preferred embodiment of the present application, by providing support legs and jointly supporting the wheelchair in the folded state through the support legs and the rear wheels, the contact area between the wheelchair and the ground can be increased. When the wheelchair is in a self-supporting folded state and has a tendency to tilt due to external force, the mutual supporting force between the support legs and the ground can offset part of the external force on the wheelchair, thereby allowing the wheelchair to maintain a relatively stable self-supporting state, which helps to improve the stability of the wheelchair's self-supporting state.

[0030] 3. As a preferred embodiment of the present application, the rear wheel side body is configured to include a support rod and a horizontal connecting rod. The configuration of the support rod and the horizontal connecting rod can improve the structural strength of the rear wheel side body, thereby increasing the overall strength of the wheelchair. At the same time, when the wheelchair is in a folded state, the locking piece below the seat support portion can also be engaged with the horizontal connecting rod to stabilize the relative position of the seat support portion and the rear wheel side body, thereby improving the wheelchair's resistance to the external force transmitted in the folded state, and then improving the self-sustaining stability of the wheelchair in the folded state. In addition, arranging the locking piece below the seat support portion can reduce the occupation of the locking piece on the external space of the wheelchair, and the seat support portion can provide a certain shielding effect on the locking piece, which helps to miniaturize the wheelchair while helping to increase the user's sensory experience.

[0031] 4. As a preferred embodiment of the present application, the mutual cooperation between the fixing part and the locking part limits the relative swing between the backrest support frame and the rear wheel side body when the wheelchair is in working state, thereby improving the stability of the wheelchair in working state; and when the wheelchair is finished and needs to be folded and stored, the connection between the backrest support frame and the rear wheel side body can be disconnected by releasing the relative lock between the fixing part and the locking part, and then the wheelchair can be folded and stored. That is, by setting the fixing part and the locking part, on the one hand, it provides a guarantee for the structural stability of the wheelchair in working state; on the other hand, it can realize the rapid release of the connection state between the backrest support frame and the rear wheel side body, thereby increasing the convenience of folding the wheelchair.

[0032] 5. As a preferred embodiment of the present application, a limit rod and a rotating part are provided to realize the locking of the fixing part and the locking part. The wheelchair can be switched between the working state and the folding state only by rotating the rotating part and abutting the rotating part against the limit rod or rotating the rotating part until it is disengaged from the limit rod. This makes it easier for the locking part to abut against or separate from the fixing part, thereby improving the smoothness of the switching of the wheelchair between the working state and the folding state.

[0033] 6. As a preferred embodiment of the present application, the control mechanism is arranged so that when the wheelchair is folded, the operator can switch the locking member to the locking position under the drive of the linkage rope by operating the pressing member; that is, before folding and storing the wheelchair, the operator can operate the locking member without bending over to touch the locking member at the bottom, which greatly improves the operator's operating convenience and helps to improve the folding efficiency of the wheelchair.

[0034] 7. As a preferred embodiment of the present application, since the users of wheelchairs are usually elderly and infirm people or disabled persons with limited walking, they usually need someone to accompany them when going out. The protruding armrests on the top of the backrest frame, on the one hand, provide a support position for the user, so that the companion can hold the armrests to assist in moving forward; on the other hand, the setting of the accommodating cavity on the armrest also provides an installation space for the pressing piece, and the pressing surface is located outside the accommodating cavity, which is convenient for the user to press the pressing surface to drive the locking mechanism to move, thereby further increasing the convenience for the user to fold and store the wheelchair. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0036] Figure 1 A side view of a wheelchair switching between a working state and a folded state in one embodiment of the present application Figure 1 :

[0037] Figure 2 A side view of a wheelchair switching between a working state and a folded state in one embodiment of the present application Figure 2 :

[0038] Figure 3 This is a side view of a wheelchair in a folded state according to one embodiment of the present application:

[0039] Figure 4 This is a schematic diagram of the structure of a wheelchair under one embodiment of the present application. Figure 1 ;

[0040] Figure 5 This is a schematic diagram of the structure of a wheelchair under one embodiment of the present application. Figure 2 ;

[0041] Figure 6 for Figure 5 A magnified view of part A;

[0042] Figure 7 This is a schematic diagram of the structure of a wheelchair in one embodiment of the present application. Figure 3 ;

[0043] Figure 8 for Figure 7 A magnified view of part B;

[0044] Fig. 9 for Figure 7 Enlarged view of part C;

[0045] Fig.10 This is a schematic diagram of the structure of a wheelchair under one embodiment of the present application. Figure 4 ;

[0046] Fig.11 for Fig.10 Enlarged view of part D.

[0047] in:

[0048] 1 front wheel support frame, 11 front wheels;

[0049] 2 rear wheel side vehicle body, 21 rear wheel, 22 support rod, 23 horizontal connecting rod, 24 second mounting member, 241 second mounting plate, 25 hinge plate, 26 supporting seat;

[0050] 3 seat support part, 31 locking member;

[0051] 4 back support frame, 41 support foot, 411 auxiliary wheel, 42 handrail, 43 first mounting member, 431 first mounting plate, 432 connecting plate;

[0052] 5 limit rod;

[0053] 6 locking member, 61 rotating portion, 62 locking portion, 621 guiding concave surface;

[0054] 7 pressing member, 71 pressing surface, 72 pressing portion;

[0055] 8 linkage rope, 81 positioning block;

[0056] 9 limiting boss, 91 limiting groove;

[0057] 10 rotating rod;

[0058] 110: a folding connecting rod, and 1101: a foot pedal. DETAILED DESCRIPTION

[0059] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0060] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0061] In addition, in the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0062] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0063] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0064] like Figures 1 to 3 As shown, a foldable wheelchair comprises: a front wheel 11 side body, comprising a front wheel support frame 11 with a front wheel 11: a rear wheel side body 2, comprising a rear wheel 21; a seat support part 3, hinged to the top of the front wheel 11 side body or the rear wheel side body 2; and a backrest support frame 4 hinged to the seat support part 3, wherein in a working state, the bottom of the backrest support frame 4 is detachably fixedly connected to the rear wheel side body 2; the foldable wheelchair is rotated and swung from the working state to a folded state by the direction in which the angle between the front wheel 11 side body, the rear wheel side body 2 and the backrest support frame 4 is reduced; in the folded state, the bottom of the backrest support frame 4 and the rear wheel 21 are simultaneously grounded to allow the foldable wheelchair to be self-standing.

[0065] The foldable wheelchair of the present application comprises a vehicle body on the front wheel 11 side, a vehicle body on the rear wheel side 2, a seat support part 3 and a back support frame 4 hinged to the seat support part 3. When the wheelchair is in a working state, the bottom of the back support frame 4 is fixedly connected to the vehicle body on the rear wheel side 2, so that the seat support part 3 hinged thereto cannot rotate relative to the vehicle body on the rear wheel side 2, so as to realize the locking of the relative positions of the seat support part 3 and the back support frame 4; the passenger can sit on the seat support part 3 and lean on the back support frame 4, which provides a guarantee for the passenger's riding stability; when the wheelchair is finished using, it is necessary to When the wheelchair is to be stored, the connection between the backrest support frame 4 and the rear wheel side body 2 is released. At this time, the seat support part 3 can rotate relative to the front wheel 11 side body or the rear wheel side body 2, and rotate toward the backrest support frame 4 until it collides with the backrest support frame 4. At this time, the angle between the front wheel 11 side body, the rear wheel side body 2 and the backrest support frame 4 is continuously reduced with the rotation of the seat support part 3, so that when the wheelchair is in the folded state, each component can occupy a smaller lateral space, which helps to improve the miniaturization of the wheelchair in the folded state and facilitates the storage of the wheelchair.

[0066] In addition, since the wheelchair is self-supporting in the folded state by relying on the support of the bottom of the back support frame 4 and the rear wheels 21, there is no need to set up a separate support for the wheelchair to achieve its self-support in the folded state, which optimizes the structural design of the wheelchair, saves the space occupied by the separate support, and reduces the manufacturing cost of the wheelchair. And after the wheelchair of the present application is folded, it does not need to lean against the wall or additional support frame, and can be directly erected on the ground or in the corner of the car trunk to avoid component damage or safety hazards caused by tipping.

[0067] Furthermore, due to changes in the user's environment, wheelchairs are usually accompanied by the need for transportation. Since the wheelchair is self-standing in the folded state relying on the support of the bottom of the back support frame 4 and the rear wheels 21, the self-standing wheelchair can further reduce the occupancy of the horizontal storage space, while also improving the portability of the wheelchair for easy transportation. When the wheelchair needs to be transported, it is often accompanied by 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 transfer vehicles. The low demand for lateral space of the wheelchair of the present application further reduces its convenience of placement in a restricted special environment, which helps to reduce the transportation pressure of the wheelchair.

[0068] As a preferred implementation of the present application, Figure 3As shown, the bottom of the backrest support frame 4 is also provided with outward supporting feet 41, and the foldable wheelchair can be self-supporting by contacting the ground with the supporting feet 41 and the rear wheels 21 when in the folded state. By providing the supporting feet 41, and by the common support of the supporting feet 41 and the rear wheels 21 to realize the common support of the wheelchair in the folded state, the contact area between the wheelchair and the ground can be increased. When the wheelchair is in the self-supporting folded state and has a tendency to tilt due to external force, the mutual supporting force between the supporting feet 41 and the ground can offset part of the external force on the wheelchair, so that the wheelchair can maintain a relatively stable self-supporting state, which helps to improve the stability of the wheelchair self-supporting.

[0069] Preferably, when the wheelchair is in working state, the support foot 41 is located in the accommodation space between the seat support portion 3 and the rear wheel side body 2. Such arrangement can realize the implicit layout of the support foot 41 in the working state of the wheelchair, reduce the space occupied by the support foot 41 outside the wheelchair, and help to improve the miniaturization of the wheelchair in the working state.

[0070] As a preferred embodiment of this implementation, Figure 3 As shown, the support foot 41 is equipped with an auxiliary wheel 411, and the rear wheel 21 and the auxiliary wheel 411 are in contact with the ground when the foldable wheelchair is in the folded state; the top of the support foot 41 has a bearing surface. When the wheelchair is in the folded state, the auxiliary wheel 411 and the rear wheel 21 jointly support the wheelchair, which is convenient for the user to move the wheelchair in the folded state, thereby facilitating the transfer of the wheelchair in the folded state; in addition, the top of the support foot 41 is provided with a bearing surface, which can be used to store and carry when the wheelchair is in the working state, helping to optimize the user's experience. Preferably, a bearing frame is provided on the bearing surface, which can be used to place sundries, etc.

[0071] As a preferred example under this embodiment, Figure 4 As shown, a movable locking member 31 is provided under the seat support portion 3, and the rear wheel side body 2 includes two support rods 22 arranged at intervals and horizontal connecting rods 23 respectively connected to the two support rods 22. When the foldable wheelchair is in the state, the locking member 31 is buckled on the horizontal connecting rod 23 to limit the relative displacement between the seat support portion 3 and the rear wheel side body 2.

[0072] The rear wheel side body 2 is configured to include a support rod 22 and a horizontal connecting rod 23. The configuration of the support rod 22 and the horizontal connecting rod 23 can improve the structural strength of the rear wheel side body 2, thereby increasing the overall strength of the wheelchair. At the same time, when the wheelchair is in a folded state, the locking piece 31 below the seat support portion 3 can also be engaged with the horizontal connecting rod 23 to stabilize the relative position of the seat support portion 3 and the rear wheel side body 2, thereby improving the wheelchair's resistance to the external force transmitted in the folded state, and then improving the self-sustaining stability of the wheelchair in the folded state, and preventing the wheelchair from accidentally unfolding or shifting during movement or storage. In addition, the locking piece 31 is arranged below the seat support portion 3, which can reduce the occupation of the locking piece 31 on the external space of the wheelchair, and the seat support portion 3 can play a certain shielding role on the locking piece 31, which helps to miniaturize the wheelchair while helping to increase the user's sensory experience.

[0073] Preferably, the locking member 31 can be a simple mechanical lock. When the wheelchair is folded into place, the locking member 31 will automatically buckle into the horizontal connecting rod 23 to achieve locking. In addition, a spring-loaded locking mechanism can also be used to provide additional locking force to further improve stability. Alternatively, the locking member 31 is rotatably connected to the seat support 3. When the wheelchair is in the folded state, the locking member 31 is rotated to be engaged with the horizontal connecting rod 23.

[0074] As a preferred implementation of the present application, Figure 5 , Figure 6 As shown, one of the backrest support frame 4 and the rear wheel side body 2 is provided with a fixing part, and the other is provided with a locking part 6 adapted to the fixing part. The locking part 6 has a locking position abutting against the fixing part to limit the rotation and swing of the folding wheelchair and an unlocking position separated from the fixing part. The locking part 6 can switch between the locking position and the unlocking position.

[0075] The cooperation between the fixing member and the locking member 6 limits the relative swing between the backrest support frame 4 and the rear wheel side body 2 when the wheelchair is in working state, thus improving the stability of the wheelchair in working state; and when the wheelchair is finished and needs to be folded and stored, the connection between the backrest support frame 4 and the rear wheel side body 2 can be disconnected by releasing the relative locking of the fixing member and the locking member 6, and then the wheelchair can be folded and stored. That is, by setting the fixing member and the locking member 6, on the one hand, the structural stability of the wheelchair in working state is guaranteed; on the other hand, the connection between the backrest support frame 4 and the rear wheel side body 2 can be quickly released, thus increasing the convenience of folding the wheelchair.

[0076] As a preferred embodiment of this implementation, Figure 6As shown, the fixing member includes a limiting rod 5 installed on the rear wheel side vehicle body 2, and the locking member 6 includes a rotating portion 61 rotatably connected to the backrest support frame 4, and a locking portion 62 abutting against the limiting rod 5 when the locking member 6 is in the locked position. The limiting rod 5 and the rotating portion 61 are provided to achieve the locking of the fixing member and the locking member 6. The wheelchair can be switched between the working state and the folding state only by rotating the rotating portion 61 to abut against the limiting rod 5 or by rotating the rotating portion 61 to be separated from the limiting rod 5, so that the locking member 6 can be more easily abutted against or separated from the fixing member, thereby improving the smoothness of the switching between the working state and the folding state of the wheelchair.

[0077] Preferably, the limiting rod 5 is a cylindrical structure to facilitate sliding cooperation with the locking portion 62 .

[0078] As a preferred example under this embodiment, Figure 7 , Figure 8 As shown, the foldable wheelchair also includes a control mechanism for driving the locking member 6 to move from the locked position to the unlocked position. The control mechanism includes a pressing member 7 and a linkage rope 8 respectively connected to the pressing member 7 and the locking member 6. The pressing member 7 can tighten the linkage rope 8 to drive the locking member 6 to move from the locked position to the unlocked position. The setting of the control mechanism enables the operator to switch the locking member 6 to the locked position under the drive of the linkage rope 8 by operating the pressing member 7 when folding the wheelchair; that is, before folding and storing the wheelchair, the operator can operate the locking member 6 without bending over to touch the bottom of the locking member 6, which greatly improves the operator's operating convenience and helps to improve the folding efficiency of the wheelchair.

[0079] Specifically, one end of the linkage rope 8 is connected to the pressing member 7, and the other end is connected to the locking member 6. When the pressing member 7 is pressed, the linkage rope 8 is tightened, driving the locking member 6 to move from the locked position to the unlocked position, completing the folding or unfolding operation of the wheelchair. Such a design not only improves the convenience of the wheelchair, but also enhances the stability and reliability of the wheelchair.

[0080] As a preferred method in this example, Figure 7 , Figure 8 As shown, a protruding armrest 42 is provided on the top of the backrest support frame 4, and a receiving cavity for receiving a pressing member 7 is provided at the bottom of the armrest 42. The pressing member 7 has a pressing surface 71. When the locking member 6 is in the locking position, the pressing surface 71 is located outside the receiving cavity.

[0081] Since the users of wheelchairs are usually elderly and infirm or disabled persons with limited walking, they usually need someone to accompany them when they go out. The handrail 42 protruding from the top of the backrest frame provides a support position for the user, which is convenient for the companion to hold the handrail 42 to assist in moving forward; on the other hand, the arrangement of the accommodating cavity on the handrail 42 also provides an installation space for the pressing member 7. The pressing surface 71 is located outside the accommodating cavity, which is convenient for the user to press the pressing surface 71 to drive the locking mechanism to move, further increasing the convenience of the user when folding and storing the wheelchair. By arranging the protruding handrail 42 at the top of the backrest support frame 4 and arranging the accommodating cavity for accommodating the pressing member 7 at the bottom of the handrail 42, the pressing member 7 is more convenient to use. Specifically, 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 accommodating cavity. Such a design makes it easier for the user to find the pressing member 7 and operate it when using it, thereby unlocking the locking member 6.

[0082] Preferably, the pressing member 7 is made of elastic material to improve the comfort and hand feel when pressing. The accommodating cavity is made by injection molding or other processing methods to ensure that it cooperates well with the pressing member 7. In addition, the pressing surface 71 of the pressing member 7 has an anti-slip texture to prevent the finger from sliding during use and increase the stability of the operation.

[0083] As a preferred solution under this method, Figure 8 As shown, a limiting boss 9 is provided in the accommodating cavity, a limiting groove 91 is provided in the limiting boss 9, the linking rope 8 passes through the limiting groove 91 and a positioning block 81 is provided at the end thereof, the positioning block 81 abuts against the limiting boss 9, and the pressing member 7 is provided with a pressing portion 72 abutting against the linking rope 8 on the side away from the pressing surface 71.

[0084] In order to achieve the portability and stability of the folding wheelchair, the present solution provides a limiting boss 9 and a limiting groove 91 in the accommodating cavity, so that the linkage rope 8 can pass through the limiting groove 91 and a positioning block 81 is provided at the end, thereby ensuring the fixation and stability of the linkage rope 8. A pressing portion 72 abutting against the linkage rope 8 is provided on the side of the pressing member 7 away from the pressing surface 71. Through the operation of the pressing member 7, the linkage rope 8 can be controlled, and then the unlocking and locking of the locking member 6 can be achieved. The setting of the limiting boss 9 and the limiting groove 91 enables the linkage rope 8 to pass through the accommodating cavity stably, and the positioning block 81 abuts against the limiting boss 9, ensuring the stability of the linkage rope 8 during operation. The abutment design of the pressing member 7 and the linkage rope 8 enables the user to control the tightening or loosening of the linkage rope 8 by pressing the pressing member 7, thereby achieving the operation of the locking member 6. This design not only ensures the simplicity of operation, but also improves the overall stability and reliability of the wheelchair.

[0085] As another preferred example under this embodiment, Figure 6As shown, the locking portion 62 has a guide concave surface 621 that is notched toward the limiting rod 5 when the locking member 6 is in the locked position. The guide concave surface 621 is slidably matched with the limiting rod 5. When the locking member 6 moves from the locked position to the unlocked position, the limiting rod 5 escapes from the end of the guide concave surface 621. The guide concave surface 621 of the locking portion 62 is designed so that the limiting rod 5 can slide and escape smoothly. This design helps to achieve smooth operation during folding and unfolding, so that the backrest support frame 4 and the rear wheel side body 2 can be separated relatively smoothly, which helps to improve the smoothness of folding the wheelchair.

[0086] Preferably, the guide concave surface 621 is an arc-shaped or inclined structure, so that the limiting rod 5 can slide smoothly when the locking member 6 moves. Furthermore, the guide concave surface 621 is made of wear-resistant material to improve its service life and reliability.

[0087] As a preferred method in this example, Fig. 9 As shown, a first mounting member 43 is provided at the bottom of the backrest support frame 4, a second mounting member 24 is provided at the rear wheel side vehicle body 2, the rotating portion 61 rotates around the rotating rod 10 installed on the first mounting member 43, and the limiting rod 5 is installed on the second mounting member 24.

[0088] 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 portion 61 of the locking member 6 rotates around the rotating rod 10 mounted on the first mounting member 43, so that it can smoothly contact or separate from the limiting rod 5, thereby improving the smoothness of folding the wheelchair. Preferably, the first mounting member 43 is bolted to the backrest support frame 4, and the second mounting member 24 is bolted to the rear wheel side body 2.

[0089] As a preferred solution under this method, Fig. 9As shown, the first mounting member 43 includes two first mounting plates 431 spaced apart, the second mounting member 24 includes two second mounting plates 241 spaced apart, the rotating rod 10 is fixedly connected to the two first mounting plates 431, and the limiting rod 5 is fixedly connected to the two second mounting plates 241. The two ends of the rotating rod 10 are fixedly connected to the two first mounting plates 431, which helps to improve the structural strength of the first mounting member 43 and makes the connection between the rotating rod 10 and the first mounting member 43 more stable; similarly, the two ends of the limiting rod 5 are fixedly connected to the two second mounting plates 241, which helps to improve the structural strength of the second mounting member 24 and makes the connection between the limiting rod 5 and the second mounting member 24 more stable. Specifically, first mounting holes are respectively opened on the first mounting plates 431, 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 plates 431; second mounting holes are respectively opened on the second mounting plates 241, 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 plates 241.

[0090] Furthermore, if Fig. 9 As shown, the first mounting member 43 further includes a connecting plate 432 located at the top of the two first mounting plates 431, and the connecting plate 432 is provided with a through hole, and the linkage rope 8 is passed through the through hole and connected to the rotating part 61. The setting of the connecting plate 432 connects the two first mounting plates 431 as a whole, thereby improving the structural strength of the first mounting member 43. At the same time, the setting of the connecting plate 432 also provides a passage for the linkage rope 8 to prevent the linkage rope 8 from moving, thereby helping to improve the working stability of the linkage rope 8.

[0091] As a preferred implementation of the present application, Fig.10 As shown, the foldable wheelchair further includes a folding link 110, the seat support portion 3, the front wheel support frame 11, the folding link 110, and the back support frame 4 are hinged in sequence, and the rear wheel side body 2 is hinged to the seat support portion 3 and the folding link 110 respectively. The seat support portion 3, the front wheel support frame 11, the folding link 110 and the back support frame 4 together form a four-bar linkage. When the wheelchair is in a working state, since the back support frame 4 hinged to the seat support portion 3 is fixed in relative position to the rear wheel side body 2, the seat support portion 3 and the rear wheel side body 2 cannot rotate relative to each other, the four-bar linkage remains stable, and the seat support portion 3 can stably carry the occupant. 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 not restricted and can rotate freely. As the seat support part 3 is continuously folded and approached to the backrest support frame 4, the folding connecting rod 110 and the front wheel support frame 11 are also folded, which greatly improves the convenience of folding the wheelchair. The operator can fold and store the wheelchair by holding the backrest support frame 4 and the seat support part 3 with both hands, which optimizes the user experience.

[0092] As a preferred embodiment of this implementation, Fig.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 is provided with a support groove, the hinge plate 25 is at least partially located in the support groove, and the folding connecting rod 110 is hinged to the hinge plate 25. The hinge plate 25 is hinged to the folding connecting rod, which reduces the number of hinge holes provided on the rear wheel side body 2, helps to improve the structural strength of the rear wheel side body 2, and 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 hole on the hinge plate 25. In addition, the setting of the support seat 26 can support the hinge plate 25, reduce the bearing pressure of the hinge plate 25, and the support seat 26 is provided with a support groove, which can play a certain limiting role on the hinge plate 25, and prevent the hinge plate 25 from being deflected due to the eccentric force or other factors.

[0093] As a preferred example under this embodiment, Figure 1 As shown, the front wheel support frame 11 has a front wheel 11 at the bottom. When the foldable wheelchair is in working state, the front wheel 11 and the rear wheel 21 jointly support the foldable wheelchair. The spaced front wheel 11 and the rear wheel 21 jointly support the wheelchair and drive the wheelchair to move, thereby ensuring the stability of the wheelchair in working state.

[0094] As another preferred example under this embodiment, Fig.10 As shown, the folding connecting rod 110 is provided with a footrest 1101 at one end away from the rear wheel side vehicle body 2. The setting of the footrest 1101 provides a foot placement position for the passenger, which helps to improve the passenger's riding experience.

[0095] The present application also provides a folding method for a foldable wheelchair, and the specific method is as follows: the user presses a release button on the handle, triggers the locking part to unlock through the linkage rope, controls the front end of the seat support part to be lifted upward, separates the backrest support frame from the rear wheel side body, rotates the rear wheel side body and the seat support part in a direction in which the angle between the two is reduced, and the bottom of the backrest support frame drives the front wheel side body to rotate in a direction in which the angle between the front wheel side body and the seat support part is reduced through the retractable connecting rod to form a folded state of the wheelchair, and locks the rear wheel side body through the locking part to achieve locking of the folded state, flips the footrest upward, and can achieve self-reliance by contacting the ground with the supporting feet and the rear wheels.

[0096] The present method is used to fold the wheelchair, and the specific operation process only requires three steps of "pressing - lifting - folding", which simplifies the operation steps and improves the user's convenience. At the same time, it ensures the stability and independence of the wheelchair in the folded state. It is suitable for elderly users with decreased cognitive abilities or emergency scenarios such as sudden medical conditions that require rapid storage.

[0097] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0098] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0099] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A foldable wheelchair, comprising: The front wheel side vehicle body comprises a front wheel supporting frame having a front wheel: A rear wheel side vehicle body having a rear wheel; A seat support part, hinged to the top of the front wheel side vehicle body or the rear wheel side vehicle body; and a backrest support frame hinged to the seat support portion, wherein in a working state, the bottom of the backrest support frame is detachably and fixedly connected to the rear wheel side vehicle body; The foldable wheelchair is rotated and swung from the working state to the folding state by the front wheel side body, the rear wheel side body and the backrest support frame in a direction in which the included angle decreases; In the folded state, the bottom of the backrest support frame and the rear wheels are simultaneously grounded to allow the foldable wheelchair to be self-standing.

2. The foldable wheelchair according to claim 1, characterized in that: The bottom of the backrest support frame is also provided with outward supporting feet, and when the foldable wheelchair is in a folded state, the supporting feet and the rear wheels can contact the ground to achieve self-standing.

3. The foldable wheelchair according to claim 2, characterized in that: The support legs are provided with auxiliary wheels, and when the foldable wheelchair is in a folded state, the rear wheels and the auxiliary wheels are in contact with the ground; and the tops of the support legs are provided with bearing surfaces.

4. The foldable wheelchair according to any one of claims 2 or 3, characterized in that: A movable locking member is provided under the seat support portion, and the rear wheel side body includes two support rods arranged at intervals and horizontal connecting rods respectively connected to the two support rods. When the foldable wheelchair is in the stated state, the locking member is buckled on the horizontal connecting rod to limit the relative displacement between the seat support portion and the rear wheel side body.

5. The foldable wheelchair according to claim 1, characterized in that: One of the backrest support frame and the rear wheel side body is provided with a fixing part, and the other of the two is provided with a locking part adapted to the fixing part. The locking part has a locking position abutting against the fixing part to limit the rotation and swinging of the folding wheelchair and an unlocking position separated from the fixing part. The locking part 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 vehicle body, and the locking member includes a rotating part rotatably connected to the backrest support frame, and a locking part abutting against the limiting rod when the locking member is located at the locking position.

7. The foldable wheelchair according to claim 6, characterized in that: The foldable wheelchair also includes a control mechanism for driving the locking member to move from the locking position to the unlocking position, the control mechanism includes a pressing member and a linkage rope respectively connected to the pressing member and the locking member, and the pressing member can tighten the linkage rope to drive the locking member to move from the locking position to the unlocking position.

8. The foldable wheelchair according to claim 7, characterized in that: The top of the backrest support frame is provided with an outwardly protruding armrest, and the bottom of the armrest is provided with a receiving cavity for receiving the pressing member. The pressing member has a pressing surface, and when the locking member is in the locking position, the pressing surface is located outside the receiving cavity.

9. The foldable wheelchair according to claim 8, characterized in that: A limiting boss is provided in the accommodating cavity, a limiting groove is provided in the limiting boss, the linkage rope passes through the limiting groove and a positioning block is provided at the end, the positioning block abuts against the limiting boss, and the pressing member is provided with a pressing portion abutting against the linkage rope on the side away from the pressing surface.

10. The foldable wheelchair according to claim 6, characterized in that: The locking portion has a guide concave surface that is notched toward the direction of the limit rod when the locking piece is in the locking position. The guide concave surface is slidably matched with the limit rod. When the locking piece moves from the locking position to the unlocking position, the limit rod escapes from the end of the guide concave surface.

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

12. The foldable wheelchair according to claim 11, characterized in that: The first mounting member includes two first mounting plates spaced apart from each other, the second mounting member includes two second mounting plates spaced apart from each other, 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 member further comprises a connecting plate located on the top of the two first mounting plates, the connecting plate is provided with a through hole, the linkage rope is passed 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 connecting rod, the seat support part, the front wheel support frame, the folding connecting rod, and the backrest support frame are hinged in sequence, and the rear wheel side body is hinged to the seat support part and the folding connecting rod respectively.

15. The foldable wheelchair according to claim 14, characterized in that: The rear wheel side vehicle body is provided with an articulated plate and a supporting seat, the supporting seat is provided with a supporting groove, the articulated plate is at least partially located in the supporting groove, and the folding connecting rod is hinged to the articulated 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 the 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 connecting rod is provided with a footrest at one end away from the rear wheel side body.

17. A method for folding a foldable wheelchair, characterized in that: Applied to the foldable wheelchair according to any one of claims 1 to 16, the method comprises: The user presses the release button on the handle to trigger the locking part to unlock through the linkage rope, control the front end of the seat support part to be lifted upward, separate the backrest support frame from the rear wheel side body, rotate the rear wheel side body and the seat support part in the direction of reducing the angle between them, and the bottom of the backrest support frame drives the front wheel side body to rotate in the direction of reducing the angle between the front wheel side body and the seat support part through the retracting connecting rod to form a folded state of the wheelchair, and locks the rear wheel side body through the locking part to lock the folded state, flip the footrest upward, and achieve self-standing by contacting the ground with the supporting feet and the rear wheel.

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