Folding wheelchair

Abstract

A folding wheelchair relates to the field of wheelchairs and comprises a folding frame and a locking mechanism, and the folding frame has an unfolded state and a folded state which are switched mutually; the locking mechanism comprises a pedal type shifting piece and a locking piece, the pedal type shifting piece and the folding frame are both rotatably installed on the folding frame, and the pedal type shifting piece is in transmission connection with the locking piece; the pedal type shifting piece is provided with a first position and a second position which are switched mutually, and when the pedal type shifting piece is located at the first position, the locking piece is clamped and matched with the folding frame so as to limit the folding frame from being switched to a folding state from an unfolding state; and when the locking piece is located at the second position, the locking piece unlocks the folding type bicycle frame so as to allow the folding type bicycle frame to be folded. The folding difficulty of the wheelchair can be reduced, the waist burden of old people is relieved, operation is convenient, and safety and reliability are achieved.

Description

Technical Field

[0001] The present invention relates to the field of wheelchairs, and in particular to a foldable wheelchair. Background Art With the increasing aging population and improved living standards in China, mobility for the elderly has gradually improved, including for some patients. Currently, wheelchairs are commonly used for mobility in elderly people or patients. Wheelchairs come in a variety of designs, some of which are large, take up a lot of space, and are inconvenient to store. Some wheelchairs are foldable, but these are complex and require the user to bend over to fold the wheelchair. Bending over is laborious for the elderly, making operation difficult and inconvenient.

[0002] The inventors discovered during their research that the foldable wheelchairs of the prior art have at least the following disadvantages: The elderly need to bend over to fold the wheelchair, which increases the burden on their waist and makes operation inconvenient. Summary of the Invention

[0003] The purpose of the present invention includes, for example, providing a foldable wheelchair that can reduce the difficulty of folding the wheelchair, reduce the burden on the waist of the elderly, and is easy to operate and safe and reliable.

[0004] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides a foldable wheelchair comprising: A foldable frame and a locking mechanism, wherein the foldable frame has a mutually switchable unfolded state and a folded state; the locking mechanism includes a pedal-type toggle member and a locking member, wherein the pedal-type toggle member and the foldable frame are both rotatably mounted on the foldable frame, and the pedal-type toggle member is in transmission connection with the locking member; The pedal-type toggle member has a first position and a second position that can be switched to each other. When in the first position, the locking member is engaged with the foldable frame to restrict the foldable frame from switching from the unfolded state to the folded state; when in the second position, the locking member releases the lock on the foldable frame to allow the foldable frame to be folded.

[0005] In an optional embodiment, the folding frame includes a seat frame, a backrest frame, a front leg, a rear leg and a linkage assembly; the backrest frame is rotatably connected to the seat frame, the front leg or the rear leg is rotatably connected to the seat frame, and the front leg and the rear leg are rotatably matched; the linkage assembly is simultaneously connected to the backrest frame, the front leg and the rear leg, so that when the rear leg is folded relative to the seat frame, the front leg and the rear leg are driven to fold relative to the seat frame through the linkage assembly.

[0006] In an optional embodiment, the foot-operated toggle member and the locking member are both mounted on the rear leg frame; When the pedal-type toggle member is in the first position, the locking member is engaged with the backrest frame to limit the backrest frame from rotating and folding relative to the seat cushion frame.

[0007] In an optional embodiment, the pedal-type toggle member includes a pedal paddle and a force transmission pin, the pedal paddle is rotatably connected to the rear leg, and the force transmission pin is fixedly connected to the pedal paddle; The locking member is rotatably connected to the rear leg frame, and a force transmission groove and a clamping groove are provided on the locking member, and the force transmission pin is inserted into the force transmission groove; The backrest frame is provided with a latch, and when the pedal-type toggle member is in the first position, the latch slot engages with the latch to restrict the backrest frame from rotating and folding relative to the seat cushion frame in the first direction; When the force transmission pin rotates along the second direction with the pedal paddle, the force transmission pin slides relative to the force transmission slot while driving the locking member to rotate along the first direction, so that the slot disengages from the pin; the first direction is opposite to the second direction.

[0008] In an optional embodiment, the locking mechanism further comprises an elastic member, which is connected to both the locking member and the rear leg, and is configured to cause the locking member to tend to rotate toward the latch after the locking member is disengaged from the latch.

[0009] In an optional embodiment, the locking member is provided with a guiding slope, which is used to contact the latch when the backrest frame rotates from the folded state to the unfolded state and can guide the latch into the latch slot.

[0010] In an optional embodiment, when the foldable frame is in the unfolded state, the backrest frame is in contact with the rear leg frame.

[0011] In an optional embodiment, the backrest frame is provided with a positioning groove, and when the foldable frame is in the unfolded state, the positioning groove is engaged with the rear leg frame.

[0012] In an optional embodiment, the linkage assembly includes a first transmission member and a second transmission member, one end of the first transmission member is rotatably connected to the front leg frame, and the other end of the first transmission member is rotatably connected to the back frame; one end of the second transmission member is rotatably connected to the back frame, and the other end of the second transmission member is rotatably connected to the rear leg frame.

[0013] In an optional embodiment, the foldable wheelchair further includes a foldable footrest and an armrest, wherein the footrest is rotatably connected to the front leg frame, and the armrest is rotatably connected to the backrest frame.

[0014] The beneficial effects of the embodiments of the present invention include, for example: In summary, the foldable wheelchair provided in this embodiment is provided with a locking mechanism installed on the foldable frame. The locking mechanism includes a foot-operated toggle and a locking member. The foot-operated toggle and the locking member are transmission-connected, and both are installed on the foldable frame. Under normal circumstances, the foldable frame is in the unfolded state, and the locking member and the foot-operated frame are engaged. At this time, the foot-operated toggle and the locking member cooperate together and can restrict the foldable frame from switching to the folded state, so that the wheelchair can be used normally. When the wheelchair needs to be folded, the operator only needs to step on the foot-operated toggle with his foot to apply force to the foot-operated toggle. The foot-operated toggle drives the locking member to move, and the locking member can move relative to the foldable frame, thereby releasing the lock on the foldable frame, and the foldable frame can be folded. In this way, the user can release the lock while standing, without having to bend over to release the lock. This puts less burden on the waist of the elderly, and the operation is convenient and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 is a schematic diagram of a foldable wheelchair according to this embodiment; Figure 2 is a schematic diagram of the foldable frame of this embodiment; Figure 3 is a side view schematic diagram of the foldable wheelchair of this embodiment; Figure 4 for Figure 3 A locally enlarged schematic diagram; Figure 5 is a schematic diagram of the locking mechanism of this embodiment; Figure 6 Schematic diagram of the foldable wheelchair of this embodiment during the folding process; Figure 7 FIG. 4 is a schematic diagram of the foldable wheelchair of this embodiment in a folded state. FIG.

[0017] icon: 001-first axis; 002-second axis; 003-third axis; 004-fourth axis; 005-fifth axis; 006-sixth axis; 100-folding frame; 110-seat frame; 120-backrest frame; 121-skeleton; 122-connecting rod; 123-pin; 124-mounting shaft; 125-positioning groove; 130-front footrest; 140-rear footrest; 150-linkage assembly; 151-first transmission member; 152-second transmission member; 200-locking mechanism; 210-foot-operated toggle member; 211-foot-operated paddle; 212-force transmission pin; 220-locking member; 221-force transmission groove; 222-pin groove; 223-guide slope; 300-foot pedal; 400-armrest; 500-seat body; 600-backrest body; 700-traveling wheel. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0021] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0023] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0024] In the prior art, the unlocking structure of a foldable wheelchair is generally arranged on the side of the frame, requiring the user to bend over to manually unlock the wheelchair. For the elderly, since their waist flexibility is poor, bending over to unlock the wheelchair increases the burden on their waist, is labor-intensive, and is inconvenient to operate.

[0025] In view of this, the designer provides a foldable wheelchair that can reduce the difficulty of unlocking, reduce the burden on the elderly's waist, and improve convenience and flexibility.

[0026] Please refer to Figure 1-Figure 7 , this embodiment provides a foldable wheelchair, comprising: The foldable frame 100 and the locking mechanism 200 are configured such that the foldable frame 100 can be switched between an unfolded state and a folded state. The locking mechanism 200 includes a pedal-operated toggle 210 and a locking member 220. The pedal-operated toggle 210 and the foldable frame 100 are both rotatably mounted on the foldable frame 100. The pedal-operated toggle 210 and the locking member 220 are in transmission connection with each other. The pedal-type toggle member 210 has a first position and a second position that can be switched to each other. When in the first position, the locking member 220 engages with the foldable frame 100 to restrict the foldable frame 100 from switching from the unfolded state to the folded state; when in the second position, the locking member 220 releases the lock on the foldable frame 100 to allow the foldable frame 100 to be folded.

[0027] As described above, the foldable wheelchair provided in this embodiment is used as follows: The locking mechanism 200 is mounted on the foldable frame 100. The locking mechanism 200 includes a foot-operated toggle 210 and a locking member 220. The foot-operated toggle 210 and the locking member 220 are in driving connection with each other and are both mounted on the foldable frame 100. Under normal circumstances, the foldable frame 100 is in the unfolded state, and the locking member 220 and the foot-operated frame are engaged. In this case, the foot-operated toggle 210 and the locking member 220 engage together and can restrict the foldable frame 100 from switching to the folded state, allowing normal use of the wheelchair. When the wheelchair needs to be folded, the operator only needs to step on the foot-operated toggle member 210 and apply force to the foot-operated toggle member 210. The foot-operated toggle member 210 drives the locking member 220 to move, and the locking member 220 can move relative to the foldable frame 100, thereby releasing the lock on the foldable frame 100, and the foldable frame 100 can be folded. In this way, the user can remain standing to release the lock without bending over, which puts less burden on the waist of the elderly and is convenient and reliable to operate.

[0028] The following embodiments illustrate the details of the foldable wheelchair of the present application by way of examples.

[0029] Please refer to Figure 1-Figure 7 In this embodiment, the foldable wheelchair optionally includes a foldable frame 100, a locking mechanism 200, a footrest 300, two armrests 400, a seat cushion body 500, and a backrest body 600. The locking mechanism 200, the footrest 300, the two armrests 400, the seat cushion body 500, and the backrest body 600 are all mounted on the foldable frame 100, and the two armrests 400 are respectively located on both sides of the foldable frame 100 in the width direction.

[0030] Optionally, the foldable bicycle frame 100 includes a seat frame 110, a backrest frame 120, a front leg frame 130, a rear leg frame 140, and a linkage assembly 150. The backrest frame 120 and the seat frame 110 are rotatably connected about a first axis 001, and the front leg frame 130 and the seat frame 110 are rotatably connected about a second axis 002. The front leg frame 130 and the rear leg frame 140 are rotatably coupled about the second axis 002, i.e., the rotation axes of the front leg frame 130 and the rear leg frame 140 are collinear. The linkage assembly 150 is simultaneously connected to the backrest frame 120, the front leg frame 130, and the rear leg frame 140. When the rear leg frame 140 is folded relative to the seat frame 110, the linkage assembly 150 drives the front leg frame 130 and the rear leg frame 140 to fold relative to the seat frame 110.

[0031] Specifically, the seat frame 110 has opposing front and rear sides, with the seat cushion body 500 mounted on top of the frame 110. There are two front legs 130 and two rear legs 140. The two front legs 130 are rotatably connected to the front side of the seat frame 110, while the two rear legs 140 are rotatably connected to the two front legs 130. Wheels 700 are mounted at the bottom of each of the front and rear legs 130, 140. Brake pads are installed on the wheels 700, locking them against rotation and providing increased safety. The backrest frame 120 includes two frames 121 and multiple connecting rods 122 connecting the two frames 121. Both frames 121 are rotatably connected to the rear side of the seat frame 110 around a common axis. The backrest body 600 is mounted on the two frames 121. Positioning grooves 125 are also provided at the bottom of each frame 121. The two frames 121 are fixed with mounting shafts 124, which are coaxially arranged and located on the inner sides of the two frames 121. One of the frames 121 is provided with a bayonet 123 coaxial with the mounting shaft 124, which is located on the outer side of the frame 121. Figure 2 , taking the perspective in the figure as a reference, a bayonet 123 is provided on the outside of the left skeleton 121 , a mounting shaft 124 is provided on the inside of the left skeleton 121 , and a mounting shaft 124 is provided on the inside of the right skeleton 121 .

[0032] Correspondingly, there are two linkage assemblies 150, and the connected front leg frame 130 and rear leg frame 140 are transmission-connected via a corresponding linkage assembly 150. The two linkage assemblies 150 have the same structure and cooperate with the front leg frame 130, rear leg frame 140, and backrest frame 120 in the same manner. In this embodiment, the cooperation structure of one linkage assembly 150, front leg frame 130, rear leg frame 140, and backrest frame 120 is used as an example for description.

[0033] Please refer to Figure 2 For example, the linkage assembly 150 includes a first transmission member 151 and a second transmission member 152. One end of the first transmission member 151 is rotatably connected to the corresponding front leg frame 130 about the third axis 003, and the other end of the first transmission member 151 is rotatably connected to the mounting shaft 124 on the corresponding frame 121. One end of the second transmission member 152 is rotatably connected to the mounting shaft 124 on the corresponding frame 121, and the other end of the second transmission member 152 is rotatably connected to the corresponding rear leg frame 140 about the fourth axis 004. The first transmission member 151 and the second transmission member 152 of the same linkage assembly 150 are rotatably connected to the same mounting shaft 124. With this design, when the backrest frame 120 rotates relative to the seat cushion frame 110, the first transmission member 151 and the second transmission member 152 can drive the front leg frame 130 and the rear leg frame 140 to rotate relative to the seat cushion frame 110, thereby achieving folding or unfolding.

[0034] Please refer to Figure 4-Figure 5 In this embodiment, the locking mechanism 200 optionally includes a foot-operated toggle 210, a locking member 220, and an elastic member. The foot-operated toggle 210 and the locking member 220 are both mounted on the rear leg frame 140. The elastic member is connected to both the locking member 220 and the rear leg frame 140. The locking member 220 can engage with the latch 123 on the corresponding frame 121. When the foot-operated toggle 210 is in the first position, the locking member 220 engages with the latch 123 to restrict the backrest frame 120 from rotating and folding relative to the seat cushion frame 110. The elastic member is used to cause the locking member 220 to have a tendency to rotate toward the latch 123 after the locking member 220 is disengaged from the latch 123.

[0035] Please refer to Figure 4Optionally, the pedal-type toggle member 210 includes a pedal paddle 211 and a force transmission pin 212. The pedal paddle 211 is rotatably connected to the rear leg frame 140 around the fifth axis 005, and the force transmission pin 212 is fixedly connected to the pedal paddle 211. The locking member 220 is rotatably connected to the rear leg frame 140 around the sixth axis 006. The pedal paddle 211 and the locking member 220 are both located on the outside of the rear leg frame 140, so as to facilitate cooperation with the bayonet 123 on the outside of the corresponding frame 121. At the same time, the locking member 220 is provided with a force transmission groove 221 and a clamping groove 222. The force transmission groove 221 is a strip-shaped groove, and the force transmission pin 212 is inserted into the force transmission groove 221. When the pedal-type toggle member 210 is in the first position, the clamping groove 222 is engaged with the bayonet pin 123 to limit the backrest frame 120 from rotating and folding along the first direction relative to the seat cushion frame 110. When force is applied to the pedal paddle 211 to rotate it in the second direction, the force transmission pin 212 rotates along the second direction with the pedal paddle 211. The force transmission pin 212 slides relative to the force transmission groove 221 in the longitudinal direction of the force transmission groove 221 while driving the locking member 220 to rotate in the first direction, so that the locking groove 222 disengages the locking pin 123, thereby releasing the lock, and the backrest frame 120 can rotate relative to the seat cushion frame 110 in the second direction to achieve folding. The first direction is opposite to the second direction. Please refer to Figure 3 Taking the perspective of this figure as an example, the first direction can be understood as the clockwise direction, and correspondingly, the second direction can be understood as the counterclockwise direction.

[0036] Optionally, the elastic member can be configured as a torsion spring or the like.

[0037] It should be understood that the operation modes of the foldable wheelchair of this embodiment include, for example: Please refer to Figure 3 、 Figure 6 and Figure 7When the foldable bicycle frame 100 is to be switched from the unfolded state to the folded state, force is first applied to the pedal paddle 211 to rotate it in the first direction. The pedal paddle 211 then drives the locking member 220 to rotate a certain angle in the second direction via the force transmission pin 212, causing the locking slot 222 of the locking member 220 to disengage from the latch 123. Force is then applied to the backrest frame 120, causing the backrest frame 120 to rotate and fold in the second direction. The front legs 130 can also rotate and fold in the second direction, or the legs can rotate and fold in the second direction, ultimately folding against both sides of the seat frame 110. It is worth noting that after folding begins, the external force applied to the pedal paddle 211 is removed. Under the action of the elastic member, the locking member 220 can rotate and return in the first direction, and is now in a position where it can engage with the latch 123. When the foldable frame 100 is unfolded, force can be applied to the backrest frame 120, and the front and rear legs 130, 140 can be gradually unfolded by their own weight. The latch 123 on the backrest frame 120 can contact the locking member 220 and first push the locking member 220 to rotate in the second direction. When the latch 123 rotates to the front of the locking member 220 in the first direction, the locking member 220 rotates back in the first direction under the action of the elastic member. The locking groove 222 on the locking member 220 can automatically engage with the latch 123 and make a "click" sound, indicating that the foldable frame 100 is fully unfolded. Moreover, when the locking is in place, the two positioning grooves 125 on the two frames 121 also engage with the two rear legs 140 respectively, supporting the backrest frame 120 through the two rear legs 140, thereby improving stability and reliability.

[0038] To further ensure that the latch 123 automatically engages with the slot 222 during the transition from the folded state to the unfolded state, a guide slope 223 can be provided on the top of the locking member 220. The guide slope 223 is an arc-shaped surface, and the latch 123 can contact the guide slope 223. Guided by the guide slope 223, the latch 123 can push the locking member 220 to rotate in the second direction. At the same time, the latch 123 can move to the front of the locking member 220 in the first direction, thereby causing the locking member 220 to rotate in the first direction under the action of the elastic member, and the slot 222 on the locking member 220 can smoothly engage with the latch 123. The design of the guide slope 223 makes it difficult for the locking member 220 and the latch 123 to interfere with each other and jam, and the movement is stable and reliable.

[0039] In this embodiment, optionally, the footrest 300 can be rotated and folded relative to the front leg frame 130, and the armrest 400 can be rotated and folded relative to the corresponding frame 121. The overall volume is small and easy to store.

[0040] The foldable wheelchair provided in this embodiment can be folded by triggering the foot-operated toggle 210 in a standing position to release the lock of the foldable frame 100 by the locking mechanism 200. The unfolded frame can then be switched to a folded state without bending over, thereby reducing the burden on the waist of the elderly and making the operation convenient and reliable.

[0041] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A foldable wheelchair, characterized in that: include: A foldable frame (100) and a locking mechanism (200), wherein the foldable frame (100) has an unfolded state and a folded state that can be switched between each other; the locking mechanism (200) comprises a pedal-type toggle member (210) and a locking member (220); the pedal-type toggle member (210) and the foldable frame (100) are both rotatably mounted on the foldable frame (100); and the pedal-type toggle member (210) is in transmission connection with the locking member (220); The pedal-type toggle member (210) has a first position and a second position that can be switched to each other. When in the first position, the locking member (220) engages with the foldable frame (100) to restrict the foldable frame (100) from switching from the unfolded state to the folded state; when in the second position, the locking member (220) releases the lock on the foldable frame (100) to allow the foldable frame (100) to be folded.

2. The foldable wheelchair according to claim 1, characterized in that: The foldable bicycle frame (100) comprises a seat frame (110), a backrest frame (120), a front leg frame (130), a rear leg frame (140) and a linkage assembly (150); the backrest frame (120) is rotatably connected to the seat frame (110), the front leg frame (130) or the rear leg frame (140) is rotatably connected to the seat frame (110), and the front leg frame (130) and the rear leg frame (140) are rotatably matched; the linkage assembly (150) is simultaneously connected to the backrest frame (120), the front leg frame (130) and the rear leg frame (140), so that when the rear leg frame (140) is folded relative to the seat frame (110), the front leg frame (130) and the rear leg frame (140) are driven by the linkage assembly (150) to fold relative to the seat frame (110).

3. The foldable wheelchair according to claim 2, characterized in that: The pedal-type toggle member (210) and the locking member (220) are both mounted on the rear leg frame (140); When the pedal-type toggle member (210) is in the first position, the locking member (220) engages with the backrest frame (120) to limit the backrest frame (120) from rotating and folding relative to the cushion frame (110).

4. The foldable wheelchair according to claim 3, characterized in that: The pedal-type toggle member (210) comprises a pedal paddle (211) and a force transmission pin (212), wherein the pedal paddle (211) is rotatably connected to the rear leg frame (140), and the force transmission pin (212) is fixedly connected to the pedal paddle (211); The locking member (220) is rotatably connected to the rear leg frame (140), and a force transmission groove (221) and a clamping groove (222) are provided on the locking member (220), and the force transmission pin (212) is inserted into the force transmission groove (221); A latch (123) is provided on the backrest frame (120); when the pedal-type toggle member (210) is in the first position, the latch slot (222) engages with the latch (123) to restrict the backrest frame (120) from rotating and folding in a first direction relative to the cushion frame (110); When the force transmission pin (212) rotates along the second direction with the pedal paddle (211), the force transmission pin (212) slides relative to the force transmission slot (221) and drives the locking member (220) to rotate along the first direction, so that the locking slot (222) is disengaged from the locking pin (123); the first direction is opposite to the second direction.

5. The foldable wheelchair according to claim 4, characterized in that: The locking mechanism (200) further comprises an elastic member connected to both the locking member (220) and the rear leg frame (140), the elastic member being used to cause the locking member (220) to rotate towards the latch (123) after the locking member (220) is disengaged from the latch (123).

6. The foldable wheelchair according to claim 5, characterized in that: The locking member (220) is provided with a guide slope, and the guide slope is used to contact the latch (123) when the backrest frame (120) rotates from a folded state to an unfolded state, and can guide the latch (123) into the latch slot (222).

7. The foldable wheelchair according to any one of claims 2 to 6, characterized in that: When the foldable vehicle frame (100) is in the unfolded state, the backrest frame (120) is in contact with the rear leg frame (140).

8. The foldable wheelchair according to claim 7, characterized in that: The backrest frame (120) is provided with a positioning groove (125); when the foldable frame (100) is in the unfolded state, the positioning groove (125) is engaged with the rear leg frame (140).

9. The foldable wheelchair according to any one of claims 2 to 6, characterized in that: The linkage assembly (150) includes a first transmission member (151) and a second transmission member (152), wherein one end of the first transmission member (151) is rotatably connected to the front leg frame (130), and the other end of the first transmission member (151) is rotatably connected to the backrest frame (120); one end of the second transmission member (152) is rotatably connected to the backrest frame (120), and the other end of the second transmission member (152) is rotatably connected to the rear leg frame (140).

10. The foldable wheelchair according to any one of claims 2 to 6, characterized in that: The foldable wheelchair further comprises a foldable footrest (300) and an armrest (400), wherein the footrest (300) is rotatably connected to the front leg frame (130), and the armrest (400) is rotatably connected to the backrest frame (120).

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