A left and right transverse flat folding wheelchair

Abstract

The utility model discloses a left and right transverse flat type folding wheelchair, including left side frame, right side frame, the left side frame is with right side frame between clamping and wearing left and right transverse flat type hinged folding device, and left and right transverse flat type hinged folding device is transverse flat type extension opening and contraction folding. The design of left and right transverse flat type hinged folding device makes the wheelchair when receiving occupies the space smaller, is convenient for carrying and storage, and the supporting force is good, and the bearing capacity is good, and the spacious bottom space between left side frame and right side frame, and left and right transverse flat type hinged folding device is flat type extension opening and contraction folding, and left and right transverse flat type hinged folding device is flat type extension opening and contraction folding between left side frame and right side frame. The design effectively improves the portability of wheelchair and the stability of sitting on the wheelchair, is applicable to a variety of use scenes, especially suitable for family and travel demand, and user operation is simple, and the maintenance cost is low.

Description

Technical Field

[0001] This utility model relates to a wheelchair, and more particularly to a horizontally folding wheelchair. Background Technology

[0002] 1. Chinese Patent Publication No. CN221814483U discloses a foldable electric wheelchair, including an X-shaped folding frame; a left wheel frame, which is hinged to the left side of the X-shaped folding frame, with a left front wheel rotated on the front side of the left wheel frame and a left rear wheel rotated on the rear side of the left wheel frame; a right wheel frame, which is hinged to the right side of the X-shaped folding frame, with a right front wheel rotated on the front side of the right wheel frame and a right rear wheel rotated on the rear side of the right wheel frame; and a drive assembly, which consists of a left motor and a right motor, with the left motor fixed inside the left wheel frame and used to drive the left rear wheel to rotate, and the right motor fixed inside the right wheel frame and used to drive the right rear wheel to rotate, the left motor and the right motor being arranged alternately.

[0003] The aforementioned X-shaped folding frame is set vertically. This X-shaped folding frame cannot be extended or retracted laterally. It unfolds and folds vertically from left to right. The X-shaped folding frame occupies a lot of space between the left and right wheel frames, and the bottom is not spacious. After the X-shaped folding frame is unfolded, a V-shaped gap is formed in the upper middle part, which cannot support the weight of the wheelchair seat cushion / board. The seat has poor load-bearing capacity, does not act as a crossbeam, and is not very stable.

[0004] 2. Chinese Patent Publication No. CN214967902U discloses a wheelchair with retractable armrests. The wheelchair with retractable armrests includes a first support and a second support arranged in parallel at intervals. The first support and the second support are connected by two connecting rods that are hinged in an X shape. The two ends of the two connecting rods are fixedly connected to the first support and the second support, respectively. Armrests are fixedly connected to the upper ends of the first support and the second support, respectively. The armrests include a base and a top cover. The base is provided with a groove. The two sides of the groove are provided with wave-shaped roller grooves. The lower side of the top cover is fixed with a post and sliding grooves located on both sides of the post. A mounting shaft is slidably assembled in the sliding groove. A roller that matches the roller groove is rotatably mounted on the mounting shaft. A compression spring is provided between the mounting shaft and the fixed post to press the roller into the roller groove.

[0005] The first and second supports are connected longitudinally by two X-shaped hinged connecting rods, forming an X-shaped hinge frame. This X-shaped hinge frame cannot be extended or retracted laterally; it unfolds and folds vertically to the left and right. This X-shaped hinge frame occupies a lot of space under the wheelchair seat, making the space under the seat not spacious. After unfolding, the upper middle part of the X-shaped hinge frame forms a V-shaped void, which cannot support the weight of the wheelchair seat cushion / board. The seat has poor load-bearing capacity, does not act as a crossbeam, and is not very stable. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a horizontally folding wheelchair with a reasonable structural design, good support and load-bearing capacity, and a spacious bottom space between the left and right frames.

[0007] The solution to the above technical problem is as follows:

[0008] A horizontally folding wheelchair includes a left frame and a right frame, with a horizontally folding hinge device sandwiched between the left and right frames. The horizontally folding hinge device can be horizontally extended and retracted.

[0009] The left and right horizontal flat hinge folding device is laid horizontally flat.

[0010] The left and right horizontal flat hinge folding device includes a left side plate, a left and right horizontal telescopic folding hinge frame, and a right side plate. The left side plate and the right side plate are hinged together by the left and right horizontal telescopic folding hinge frame. The middle part of the left frame is fixedly connected to the left side plate. The middle part of the right frame is fixedly connected to the right side plate.

[0011] The left and right flat telescopic folding hinge frame includes a left front hinge, a left rear hinge, a middle X-shaped hinge, a right front hinge, and a right rear hinge. The left front hinge, left rear hinge, middle X-shaped hinge, right front hinge, and right rear hinge are arranged horizontally. The inner sidewall of the left side panel is hinged to one end of the left front hinge and the left rear hinge, respectively, and the left front hinge and the left rear hinge can only be hinged to each other relative to the left side panel. The inner sidewall of the right side panel is hinged to one end of the right front hinge and the right rear hinge, respectively, and the right front hinge and the right rear hinge can only be hinged to each other relative to the right side panel. The other end of the left front hinge and the left rear hinge is hinged to the left front end and the left rear end of the corresponding middle X-shaped hinge. The other end of the right front hinge and the right rear hinge is hinged to the right front end and the right rear end of the corresponding middle X-shaped hinge.

[0012] The beneficial effects of this utility model of a horizontally folding wheelchair are as follows: The design of the horizontally folding mechanism of this product makes the wheelchair occupy less space when stored, making it easier to carry and store. It has good support and load-bearing capacity, and the bottom space between the left and right frames is spacious. The horizontally folding mechanism extends and retracts horizontally between the left and right frames. The horizontally folding mechanism does not have longitudinal folding, requiring less folding space. The overall design facilitates the left and right folding of the wheelchair. This design effectively improves the portability and stability of the wheelchair, making it suitable for various usage scenarios, especially for family and travel needs. It is easy for users to operate and has low maintenance costs. Attached Figure Description

[0013] Figures 1-4 This is a perspective view of the wheelchair, the product of this utility model.

[0014] Figure 5 This is a left view of the wheelchair of this utility model.

[0015] Figure 6 This is a right view of the wheelchair, the product of this utility model.

[0016] Figure 7 This is a front view of the wheelchair product of this utility model;

[0017] Figure 8 This is a rear view of the wheelchair, the product of this utility model.

[0018] Figure 9 This is a top view of the wheelchair, the product of this utility model;

[0019] Figure 10 This is a bottom view of the wheelchair, the product of this utility model;

[0020] Figure 11 , Figure 12 This is an exploded view of the wheelchair, the product of this utility model;

[0021] Figures 13-15 This is a perspective view showing the connection relationship between the left side frame, the left and right lateral horizontal hinged folding devices, and the right side frame of the present invention.

[0022] Figure 16 , Figure 17 This is a split view of the left frame, the left and right horizontal flat hinged folding device, and the right frame of the present invention.

[0023] Figures 18-19 This is a perspective view of the horizontally hinged folding device of this utility model.

[0024] Figures 20-21 This is an exploded view of the horizontally hinged folding device of this utility model.

[0025] Figure 22 This is an exploded view of the left and right horizontal telescopic folding hinge frame of this utility model product;

[0026] Figure 23 This is a diagram showing the folding state of the horizontally horizontally hinged folding device of this utility model.

[0027] Figure 24 This is a diagram showing the folded state of the left and right horizontal telescopic folding hinge frame of this utility model product;

[0028] Figures 25-29 This is a diagram showing the folded state of the wheelchair of this utility model.

[0029] Left side frame 1, left side curved tube 11, left front leg vertical bar 11A, left handlebar 11B, left push handle 11C, left rear leg curved bar 12, left and right horizontal flat hinged folding device 2, left side panel 21, left front upper end 211, left front middle protrusion 212, left front lower end 213, left front upper notch 21A, left front lower notch 21B, left rear upper notch 21C, left rear lower notch 21D, left rear upper end 214, left rear middle protrusion 215, left rear lower end 216, left front limiting protrusion 217, left rear limiting protrusion 218, left and right flat Telescopic folding hinge frame 22, left front hinge 221, left front upper link 2211, left front lower link 2212, left front vertical hinge shaft 2213, left rear hinge 222, left rear upper link 2221, left rear lower link 2222, left rear vertical hinge shaft 2223, middle X-shaped hinge frame 223, middle upper link 2231, middle lower link 2232, middle hinge shaft 2233, left rear vertical shaft 2234, left front vertical shaft 2235, right front vertical shaft 2236, right rear vertical shaft 2237, right front hinge 224, right front upper link 2241, Right front lower connecting rod; 2242, Right front vertical hinge shaft; 2243, Right rear hinge piece; 225, Right rear upper connecting rod; 2251, Right rear lower connecting rod; 2252, Right rear vertical hinge shaft; 2253, Right side plate; 231, Right front upper end; 232, Right front middle protrusion; 233, Right front lower end; 23A, Right front upper notch; 23B, Right front lower notch; 23C, Right rear upper notch; 23D, Right rear upper end; 234, Right rear middle protrusion; 235, Right rear lower end; 236, Right front limiting protrusion; 237, Right rear limiting protrusion; 238 3. Right side frame; 31. Right side curved tube; 31A. Right front leg upright; 31B. Right armrest; 31C. Right push handle; 32. Right rear leg curved rod; 4. Seat panel; 41. Left half folding panel; 411. Left step; 412. Left through-shaft protrusion; 413. Left through-shaft through hole; 42. Right half folding panel; 421. Right step; 422. Right through-shaft protrusion; 423. Right through-shaft through hole; 43. Panel hinge shaft; 5. Buckle device; 51. Buckle plate connector; 52. Buckle hook plate; 53. Buckle hook; 6. Foldable backrest cushion device; 61. Left backrest connector; 62. Right backrest connector. Detailed Implementation

[0030] like Figures 1 to 29As shown: A horizontally folding wheelchair includes a left frame 1 and a right frame 3, both made of metal and symmetrical. The main technical improvement of this product lies in the fact that a horizontally folding hinged device 2 is sandwiched between the left frame 1 and the right frame 3. This device 2 is horizontally flat and can be extended and retracted horizontally. It cannot be extended or retracted longitudinally. The design of the horizontally folding hinged device 2 makes the wheelchair occupy less space when stored, making it easier to carry. It features good support and load-bearing capacity, with ample bottom space between the left and right frames 1 and 3. The horizontal hinged folding device 2 extends and retracts horizontally between the left and right frames 1 and 3. The device eliminates longitudinal folding, requiring less folding space. The overall design facilitates left-right folding of the wheelchair. This design effectively improves the wheelchair's portability and stability, making it suitable for various usage scenarios, especially for family and travel needs. It is easy to operate and has low maintenance costs.

[0031] Preferably, the left and right horizontal flat hinged folding device 2 includes a left side plate 21, a left and right horizontal telescopic folding hinge frame 22, and a right side plate 23. The left side plate 21 and the right side plate 23 are integrally injection molded. The left side plate 21 and the right side plate 23 are hingedly connected by the left and right horizontal telescopic folding hinge frame 22. The left side plate 21 and the right side plate 23 provide a more stable hinge connection base for the left and right ends of the left and right horizontal telescopic folding hinge frame 22, facilitating the movable connection of the left and right horizontal telescopic folding hinge frame 22. The left side plate 21 and the right side plate 23 are left and right horizontal telescopic folding hinge frames. The left and right ends of the retractable hinge frame 22 provide more installation area and better load-bearing capacity; the middle of the left frame 1 is fixedly connected to the left side plate 21 with screw assembly; the middle of the right frame 3 is fixedly connected to the right side plate 23 with screw assembly; this is to further refine the specific structure of the left and right horizontal flat hinge folding device 2, enhance its stability and durability, ensure that it is not easily damaged during frequent folding use, extend its service life, and the flat left and right horizontal telescopic folding hinge frame 22 has good overall load-bearing capacity, making users more at ease during use.

[0032] Preferably, the left and right flat telescopic folding hinge frame 22 includes a left front hinge 221, a left rear hinge 222, a middle X-shaped hinge frame 223, a right front hinge 224, and a right rear hinge 225; the left front hinge 221, left rear hinge 222, middle X-shaped hinge frame 223, right front hinge 224, and right rear hinge 225 are arranged horizontally; the inner sidewall of the left side plate 21 is hinged to one end of the left front hinge 221 and the left rear hinge 222 respectively, and the left front hinge 221 and the left rear hinge 222 can only be hinged relative to the left side. Plate 21 is hinged front and rear. The left front hinge 221 and left rear hinge 222 can only rotate back and forth relative to the left side plate 21. The inner wall of the right side plate 23 is hinged to one end of the right front hinge 224 and right rear hinge 225, respectively. The right front hinge 224 and right rear hinge 225 can only rotate back and forth relative to the right side plate 23. The other end of the left front hinge 221 and left rear hinge 222 is connected to the corresponding intermediate X-shaped hinge frame 2. The left front end and left rear end of the 23 are hinged; the other ends of the right front hinge 224 and right rear hinge 225 are hinged to the right front end and right rear end of the corresponding middle X-shaped hinge frame 223, so that the left and right flat telescopic folding hinge frame 22 can be hinged and folded left and right, so that the left and right flat telescopic folding hinge frame 22 can be extended and retracted between the left side plate 21 and the right side plate 23, and the retracted folding volume is small; when folding, the middle X-shaped hinge frame 223 is hinged and overlapped, and the middle X-shaped hinge frame 223 pushes the left front hinge 221 and right front hinge 22. The four horizontally rotating and swinging components 221 and 222, along with the central X-shaped hinge 223, push the left rear hinge 222 and right rear hinge 225 to rotate and swing horizontally backward. This design further refines the specific structure of the left and right horizontal telescopic folding hinges 22, ensuring that all components coordinate smoothly during folding, improving overall operational fluency and enhancing the user experience. The design of the central X-shaped hinge 223 enhances the stability of the overall structure, ensuring precise coordination of all components during folding and unfolding, reducing the failure rate, extending service life, and providing users with greater peace of mind and convenience in different scenarios. The left front hinge 221 and left rear hinge 222 are symmetrical with the corresponding right front hinge 224 and right rear hinge 225, ensuring symmetry and balance and improving folding stability.

[0033] Preferably, the inner sidewall of the left side plate 21 is connected to a left front limiting protrusion 217 and a left rear limiting protrusion 218 respectively; the left front limiting protrusion 217 is used to restrict the left front hinge 221 from rotating backward during transition; the left rear limiting protrusion 218 is used to restrict the left rear hinge 222 from rotating forward during transition;

[0034] The inner sidewall of the right side plate 23 is connected to a right front limiting protrusion 237 and a right rear limiting protrusion 238 respectively. The right front limiting protrusion 237 is used to restrict the right front hinge 224 from rotating backward during transition. The left and right rear limiting protrusions 238 are used to restrict the right rear hinge 225 from rotating forward during transition.

[0035] Preferably, the inner sidewall of the left side panel 21 is connected to corresponding left front upper end head 211, left front lower end head 213, left rear upper end head 214, and left rear lower end head 216, respectively. The left front upper end head 211, left front lower end head 213, left rear upper end head 214, and left rear lower end head 216 are part of the left side panel 21. The left front upper end head 211 and left front lower end head 213 are vertically aligned. The left rear upper end head 214 and left rear lower end head 216 are vertically aligned. The distance between the left front upper end head 211 and left front lower end head 213 and the corresponding left rear upper end head 214 and left rear lower end head 216 is 10 cm to 20 cm, and a suitable distance is set.

[0036] The left front hinge 221 includes a left front upper connecting rod 2211 and a left front lower connecting rod 2212. The left front upper connecting rod 2211 and left front lower connecting rod 2212 are made of aluminum tubing, making them lightweight and providing stronger load-bearing capacity. Plastic plugs are inserted into the pipe openings at both ends of the left front upper connecting rod 2211 and left front lower connecting rod 2212 for fixation. The plastic plugs not only seal the pipe openings but also enhance the rigidity of both ends. The inner ends of the left front upper connecting rod 2211 and left front lower connecting rod 2212 are connected to the corresponding left front upper end 211 and left front lower end 213. The upper left front end 211 and the lower left front end 213 are vertically connected to the left front vertical hinge shaft 2213 to prevent detachment. The upper left front connecting rod 2211 can be hinged back and forth relative to the upper left front end 211, and the lower left front connecting rod 2212 can be hinged back and forth relative to the lower left front end 213. This is to reduce the thickness of the left side plate 21 and extend the upper left front end 211 and the lower left front end 213 to facilitate the connection of the upper left front connecting rod 2211 and the lower left front connecting rod 2212 and the connection of the left front vertical hinge shaft 2213. At the same time, it allows the upper left front connecting rod 2211 and the lower left front connecting rod 2212 to have room to rotate back and forth after the hinge is moved.

[0037] The left rear hinge 222 includes a left rear upper connecting rod 2221 and a left rear lower connecting rod 2222. The left rear upper connecting rod 2221 and the left rear lower connecting rod 2222 are made of aluminum tubing, making them lightweight and providing stronger load-bearing capacity. Plastic plugs are inserted into the pipe openings at both ends of the left rear upper connecting rod 2221 and the left rear lower connecting rod 2222 for fixation. The plastic plugs not only seal the pipe openings but also enhance the hardness of both ends. The inner ends of the left rear upper connecting rod 2221 and the left rear lower connecting rod 2222 are connected to the corresponding left rear upper end 214 and left rear lower end 216. The inner end of the left rear upper connecting rod 2221 and the left rear lower connecting rod 2222... The inner end, upper left rear end 214, and lower left rear end 216 of 222 are vertically connected to a left rear vertical hinge shaft 2223 to prevent detachment. The upper left rear connecting rod 2221 can be hinged back and forth relative to the upper left rear end 214, and the lower left rear connecting rod 2222 can be hinged back and forth relative to the lower left rear end 216. The upper left rear end 214 and lower left rear end 216 are extended and protruded to facilitate the connection of the upper left rear connecting rod 2221 and the lower left rear connecting rod 2222 and the connection of the left rear vertical hinge shaft 2223. At the same time, it allows the upper left rear connecting rod 2221 and the lower left rear connecting rod 2222 to have room to rotate back and forth after the hinge is moved.

[0038] The inner sidewall of the right side plate 23 is connected to the corresponding right front upper end head 231, right front lower end head 233, right rear upper end head 234, and right rear lower end head 236 respectively. The right front upper end head 231, right front lower end head 233, right rear upper end head 234, and right rear lower end head 236 are part of the right side plate 23. The right front upper end head 231 and right front lower end head 233 are vertically aligned. The right rear upper end head 234 and right rear lower end head 236 are vertically aligned. The distance between the right front upper end head 231, right front lower end head 233 and the corresponding right rear upper end head 234 and right rear lower end head 236 is 10 cm to 20 cm.

[0039] The right front hinge 224 includes a right front upper connecting rod 2241 and a right front lower connecting rod 2242. The right front upper connecting rod 2241 and right front lower connecting rod 2242 are made of aluminum tubing, making them lightweight and providing stronger load-bearing capacity. Plastic plugs are inserted into the left and right ends of the tubes of the right front upper connecting rod 2241 and right front lower connecting rod 2242 for fixation. The plastic plugs not only seal the tube openings but also enhance the hardness of both ends. The inner ends of the right front upper connecting rod 2241 and right front lower connecting rod 2242 are connected to the corresponding right front upper end 231 and right front lower end 233. The inner end of the right front upper connecting rod 2241 and the right front lower connecting rod 2242... The inner end, upper right front end 231, and lower right front end 233 of 242 are vertically connected to a right front vertical hinge shaft 2243 to prevent detachment. The upper right front connecting rod 2241 can be hinged back and forth relative to the upper right front end 231, and the lower right front connecting rod 2242 can be hinged back and forth relative to the lower right front end 233. The upper right front end 231 and lower right front end 233 are extended and protruded to facilitate the connection of the upper right front connecting rod 2241 and the lower right front connecting rod 2242 and the connection of the right front vertical hinge shaft 2243. At the same time, it allows the upper right front connecting rod 2241 and the lower right front connecting rod 2242 to have room to rotate back and forth after the hinge is moved.

[0040] The right rear hinge 225 includes a right rear upper connecting rod 2251 and a right rear lower connecting rod 2252. The right rear upper connecting rod 2251 and right rear lower connecting rod 2252 are made of aluminum tubing, making them lightweight and providing stronger load-bearing capacity. Plastic plugs are inserted into the left and right ends of the tubes of the right rear upper connecting rod 2251 and right rear lower connecting rod 2252 for fixation. The plastic plugs not only seal the tube openings but also enhance the hardness of both ends. The inner ends of the right rear upper connecting rod 2251 and right rear lower connecting rod 2252 are connected to the corresponding right rear upper end 234 and right rear lower end 236. The inner end of the right rear upper connecting rod 2251 and the right rear lower connecting rod 2252... The inner end, upper right rear end 234, and lower right rear end 236 of 252 are vertically connected to a right rear vertical hinge shaft 2253 to prevent detachment. The upper right rear connecting rod 2251 can be hinged back and forth relative to the upper right rear end 234, and the lower right rear connecting rod 2252 can be hinged back and forth relative to the lower right rear end 236. The upper right rear end 234 and lower right rear end 236 are extended and protruded to facilitate the connection of the upper right rear connecting rod 2251 and the lower right rear connecting rod 2252 and the connection of the right rear vertical hinge shaft 2253. At the same time, it allows the upper right rear connecting rod 2251 and the lower right rear connecting rod 2252 to have room to rotate back and forth after the hinge is moved.

[0041] The upper left front end 211, upper left rear end 214, upper right front end 231, and upper right rear end 234 are horizontally set. The upper left front connecting rod 2211, upper left rear connecting rod 2221, upper right rear connecting rod 2251, and upper right front connecting rod 2241 are set at the same height and horizontally. The upper left front connecting rod 2211 and upper left rear connecting rod 2221 are symmetrically set with the corresponding upper right front connecting rod 2241 and upper right rear connecting rod 2251, so that the upper left front connecting rod 2211, upper left rear connecting rod 2221, upper right rear connecting rod 2251, and upper right front connecting rod 2241 can rotate horizontally, receive equal force, and maintain a stable force balance; the lower left front... End 213, left rear lower end 216, right front lower end 233, and right rear lower end 236 are set horizontally. Left front lower connecting rod 2212, left rear lower connecting rod 2222, right rear lower connecting rod 2252, and right front lower connecting rod 2242 are set at the same height. Left front lower connecting rod 2212 and left rear lower connecting rod 2222 are symmetrically set with the corresponding right front lower connecting rod 2242 and right rear lower connecting rod 2252, so that the left front lower end 213, left rear lower end 216, right front lower end 233, and right rear lower end 236 can rotate horizontally, receive equal force, have balanced and stable force, are not easily deformed, and will not be bent by pressure.

[0042] The intermediate X-shaped hinge frame 223 includes an intermediate upper connecting rod 2231 and an intermediate lower connecting rod 2232, which are stacked one on top of the other. The intermediate upper connecting rod 2231 and the intermediate lower connecting rod 2232 are made of aluminum tubes and are lightweight. An intermediate hinge shaft 2233 is vertically connected between the intermediate upper connecting rod 2231 and the intermediate lower connecting rod 2232 to prevent detachment, thereby forming an X-shaped hinge frame.

[0043] The left end of the middle upper connecting rod 2231 is inserted between the outer ends of the left rear upper connecting rod 2221 and the left rear lower connecting rod 2222. The left end of the middle upper connecting rod 2231, the outer end of the left rear upper connecting rod 2221, and the outer end of the left rear lower connecting rod 2222 are all vertically connected to the left rear vertical shaft rod 2234. The left end of the middle upper connecting rod 2231 forms a movable hinge connection with the outer ends of the left rear upper connecting rod 2221 and the left rear lower connecting rod 2222 through the left rear vertical shaft rod 2234, and prevents it from detaching.

[0044] The left end of the middle lower connecting rod 2232 is inserted between the outer ends of the left front upper connecting rod 2211 and the left front lower connecting rod 2212. The left end of the middle lower connecting rod 2232, the outer end of the left front upper connecting rod 2211, and the outer end of the left front lower connecting rod 2212 are all vertically connected to the left front vertical shaft rod 2235. The left end of the middle lower connecting rod 2232 forms a movable hinge connection with the outer ends of the left front upper connecting rod 2211 and the left front lower connecting rod 2212 through the left front vertical shaft rod 2235 and prevents it from detaching.

[0045] The right end of the middle upper connecting rod 2231 is inserted between the outer ends of the right front upper connecting rod 2241 and the right front lower connecting rod 2242. The right end of the middle upper connecting rod 2231, the outer end of the right front upper connecting rod 2241, and the outer end of the right front lower connecting rod 2242 are all vertically connected to the right front vertical shaft rod 2236. The right end of the middle upper connecting rod 2231 forms a movable hinge connection with the outer ends of the right front upper connecting rod 2241 and the right front lower connecting rod 2242 through the right front vertical shaft rod 2236, and prevents it from detaching.

[0046] The right end of the middle lower connecting rod 2232 is inserted between the outer ends of the right rear upper connecting rod 2251 and the right rear lower connecting rod 2252. The right end of the middle lower connecting rod 2232, the outer ends of the right rear upper connecting rod 2251 and the right rear lower connecting rod 2252 are vertically connected to the right rear vertical shaft rod 2237. The right end of the middle lower connecting rod 2232 forms a movable hinge connection with the outer ends of the right rear upper connecting rod 2251 and the right rear lower connecting rod 2252 through the right rear vertical shaft rod 2237, and prevents it from falling off.

[0047] The hinge structure of the aforementioned left front hinge 221, left rear hinge 222, middle X-shaped hinge frame 223, right front hinge 224, and right rear hinge 225 forms a three-section folding structure (left, middle, and right). After folding and compression, it has a small volume, strong load-bearing capacity, and stable folding and unfolding process. The overall structure is stable and does not wobble. During folding and unfolding, the middle X-shaped hinge frame 223 simultaneously pulls the left front hinge 221, left rear hinge 222, right front hinge 224, and right rear hinge 225 at both ends to move in a coordinated manner, ensuring the stability of the overall structure, smooth folding / unfolding, and consistent coordination of all components. This effectively avoids local stress concentration, extends service life, improves ease of operation, and is suitable for efficient applications in various complex environments.

[0048] Preferably, the left side panel 21 is wrapped with a metal plate to improve its hardness and strength; the outer wall of the left side panel 21 is covered and fixedly connected with an outer cover plate to improve the decorative effect; the inner side wall of the left side panel 21 extends and is connected with corresponding left front middle protrusion 212 and left rear middle protrusion 215, which are part of the left side panel 21; the left front upper end head 211, left front middle protrusion 212, and left front lower end head 213 are vertically corresponding; the left rear upper end head 214, left rear middle protrusion 215, and left rear lower end head 216 are vertically corresponding.

[0049] A left front upper notch 21A is formed between the left front upper end head 211 and the left front middle protrusion 212, and the inner end of the left front upper connecting rod 2211 is inserted into the left front upper notch 21A; a left front lower notch 21B is formed between the left front lower end head 213 and the left front middle protrusion 212, and the inner end of the left front lower connecting rod 2212 is inserted into the left front lower notch 21B; the aforementioned left front upper notch 21A and left front lower notch 21B enable the corresponding connecting rods to be quickly aligned and installed and to be quickly connected to the hinge shaft. The left front middle protrusion 212 supports the inner end of the left front upper connecting rod 2211, and the left front lower end head 213 supports the inner end of the left front lower connecting rod 2212, so that the connecting rod has good load-bearing capacity and is not easy to loosen and move.

[0050] A left rear upper notch 21C is formed between the left rear upper end head 214 and the left rear middle protrusion 215, and the inner end of the left rear upper connecting rod 2221 is inserted into the left rear upper notch 21C; a left rear lower notch 21D is formed between the left rear lower end head 216 and the left rear middle protrusion 215, and the inner end of the left rear lower connecting rod 2222 is inserted into the left rear lower notch 21D; the aforementioned left rear upper notch 21C and left rear lower notch 21D enable the corresponding connecting rods to be quickly aligned and installed and to be quickly connected to the hinge shaft. The left rear middle protrusion 215 supports the inner end of the left rear upper connecting rod 2221, and the left rear lower end head 216 supports the inner end of the left rear lower connecting rod 2222, making the connecting rods have good load-bearing capacity and not easy to loosen and shift.

[0051] The inside of the right side plate 23 is wrapped with a metal plate to improve its hardness and strength; the outer wall of the right side plate 23 is covered and fixedly connected with an outer cover plate to improve the decorative effect; the inner side wall of the right side plate 23 extends and is connected with corresponding right front middle protrusion 232 and right rear middle protrusion 235 respectively, the right front middle protrusion 232 and right rear middle protrusion 235 are part of the right side plate 23; the right front upper end head 231, right front middle protrusion 232, and right front lower end head 233 are vertically corresponding; the right rear upper end head 234, right rear middle protrusion 235, and right rear lower end head 236 are vertically corresponding.

[0052] A right front upper notch 23A is formed between the right front upper end head 231 and the right front middle protrusion 232, and the inner end of the right front upper connecting rod 2241 is inserted into the right front upper notch 23A; a right front lower notch 23B is formed between the right front lower end head 233 and the right front middle protrusion 232, and the inner end of the right front lower connecting rod 2242 is inserted into the right front lower notch 23B; the aforementioned right front upper notch 23A and right front lower notch 23B enable the corresponding connecting rods to be quickly aligned and installed and to be quickly connected to the hinge shaft. The right front middle protrusion 232 supports the inner end of the right front upper connecting rod 2241, and the right front lower end head 233 supports the inner end of the right front lower connecting rod 2242, making the connecting rods have good load-bearing capacity and not easy to loosen and shift.

[0053] A right rear upper notch 23C is formed between the right rear upper end head 234 and the right rear middle protrusion 235, and the inner end of the right rear upper connecting rod 2251 is inserted into the right rear upper notch 23C; a right rear lower notch 23D is formed between the right rear lower end head 236 and the right rear middle protrusion 235, and the inner end of the right rear lower connecting rod 2252 is inserted into the right rear lower notch 23D; the aforementioned right rear upper notch 23C and right rear lower notch 23D enable the corresponding connecting rods to be quickly aligned and installed and to be quickly connected to the hinge shaft. The right rear middle protrusion 235 supports the inner end of the right rear upper connecting rod 2251, and the right rear lower end head 236 supports the inner end of the right rear lower connecting rod 2252, making the connecting rods have good load-bearing capacity and not easy to loosen and shift.

[0054] Preferably, a seat board 4 is hinged between the left side panel 21 and the right side panel 23. The seat board 4 is positioned on top of the left and right horizontal flat hinged folding device 2. During the folding process of the left and right horizontal flat hinged folding device 2, the seat board 4 must be opened or hinged folded first before the left and right horizontal flat hinged folding device 2 can be folded. Preferably, the left and right horizontal flat hinged folding device 2 supports the seat board 4, keeping it stable during use, preventing shaking, and ensuring safe use.

[0055] Preferably, the seat plate 4 can be a single piece, integrally injection molded. When a single seat plate 4 is used, when one side edge of the seat plate 4 is hinged to the inner wall of the left side plate 21 via a hinge shaft, and the other side edge is supported and fixed to the inner wall of the right side plate 23, or clamped and fixed, the seat plate 4 can be flipped open from the right side plate 23 towards the left side plate 21. After being flipped open, the seat plate 4 can be arranged longitudinally relative to the left side plate 21, and the seat plate 4 is relatively tall, which facilitates the hinged folding of the left and right horizontal flat hinged folding device 2. Conversely, when one side edge of the seat plate 4 is hinged to the inner wall of the right side plate 23 via a hinge shaft, and the other side edge is supported and fixed to the inner wall of the left side plate 21, the seat plate 4 can be flipped open from the left side plate 21 towards the right side plate 23. After being flipped open, the seat plate 4 can be arranged longitudinally relative to the right side plate 23, and the seat plate 4 is relatively tall, which facilitates the hinged folding of the left and right horizontal flat hinged folding device 2.

[0056] Preferably, the seat plate 4 includes a left half-folding plate 41, a right half-folding plate 42, and a plate hinge shaft 43. This is a preferred solution because the height can be reduced by about 50% after folding. The left side edge of the left half-folding plate 41 is hinged to the inner wall of the left side plate 21 (i.e., several left connecting heads extend from the inner wall of the left side plate 21, and the left connecting heads are provided with through holes; several left protrusions extend from the left side edge of the left half-folding plate 41, and the left protrusions are also provided with through holes. All through holes are horizontal and connected in the same straight line. The left protrusions and left connecting heads are staggered and staggered, and the left protrusions and left connecting heads are connected by a hinge shaft passing through all the through holes to form a movable hinge connection). A plate hinge shaft 43 passes through the left half folding plate 41 and the right half folding plate 42, and the left half folding plate 41 and the right half folding plate 42 are hinged together by the plate hinge shaft 43; the right edge of the right half folding plate 42 is hinged to the inner wall of the right side plate 23 (that is: several right connectors extend and protrude from the inner wall of the right side plate 23, and the right connectors are provided with through holes; several right protrusions extend from the left edge of the right half folding plate 42, and the right protrusions are also provided with through holes. All the through holes are horizontal and connected in the same straight line. The right protrusions and the right connectors are staggered and staggered, and the right protrusions and the right connectors are connected by a hinge shaft passing through all the through holes to form a movable hinge connection). When folding, first lift upwards from between the left half-folding plate 41 and the right half-folding plate 42, so that the middle of the left half-folding plate 41 and the right half-folding plate 42 fold upwards and the two halves of the folding plate come together, and the left and right horizontal flat hinge folding device 2 folds synchronously. When unfolding, the left half-folding plate 41 and the right half-folding plate 42 unfold downwards synchronously along the plate body hinge axis 43, restoring the seat plate 4 to a flat state, ensuring ease of use and stability. The left half-folding plate 41 and the right half-folding plate 42 are made of high-strength plastic material, which is wear-resistant and lightweight, effectively improving the durability and portability of the overall structure, and is suitable for frequent folding use in various scenarios. The left half-folding plate 41 and the right half-folding plate 42 are wrapped with metal plates to improve hardness and strength.

[0057] Preferably, the inner edge of the left half-folding plate 41 has a left step 411 along the axial direction; the inner edge of the right half-folding plate 42 has a right step 421 along the axial direction. The left step 411 and the right step 421 are opened in opposite directions. In use, the left step 411 and the right step 421 interlock and connect with each other, making the connection stable and firm when the two half-folding plates are laid flat, and preventing deformation, misalignment, or looseness, thus further enhancing the overall stability of the seat plate 4. This ensures that even if subjected to external impact during use, the two half-folding plates can remain tightly fitted, avoiding accidental sliding or misalignment.

[0058] Preferably, the left half-folding plate 41 has several left through-shaft protrusions 412 extending from the bottom of its inner edge, each protrusion having a left through-shaft hole 413. The right half-folding plate 42 has several right through-shaft protrusions 422 extending from the bottom of its inner edge, each protrusion having a right through-shaft hole 423. The left and right through-shaft protrusions 412 and 422 are staggered, and the plate hinge shaft 43 passes through the left and right through-shaft holes 413 and 423 to form a hinged connection between the two half-folding plates. The left and right through-shaft holes 413 and 423 are horizontally aligned with the same axis, ensuring accurate connection of the plate hinge shaft 43 and improving installation efficiency. There are three to five left and right through-shaft protrusions 412 and 422. The left through-shaft protrusion 412 is part of the left half of the folding plate 41, and the right through-shaft protrusion 422 is part of the right half of the folding plate 42.

[0059] Preferably, a locking device 5 is provided between the left half folding plate 41 and the right half folding plate 42. When the locking device 5 is locked, it cannot be folded naturally and must be manually opened before subsequent folding can be carried out, thereby improving safe use.

[0060] The locking device 5 includes a buckle plate connector 51, a locking hook plate 52, and a locking hook 53. The buckle plate connector 51 extends integrally from the reverse side of the front bottom of the left half-folding plate 41. A locking shaft passes through one end of both the buckle plate connector 51 and the locking hook plate 52, allowing the buckle plate connector 51 and the locking hook plate 52 to be movably connected. The locking hook 53 extends integrally from the reverse side of the front bottom of the right half-folding plate 42. When locking, the locking hook plate 52 is flipped over, causing the hook at the front end of the locking hook plate 52 to engage with the locking hook 53, forming a secure lock. Unlocking is simple; just apply slight force to flip the locking hook plate 52 out.

[0061] Preferably, the left side frame 1 includes a left curved tube 11 and a left rear leg curved rod 12. The left curved tube 11 includes a left front leg vertical rod 11A and a left handrail 11B. The top of the left front leg vertical rod 11A extends backward into the left handrail 11B in a single integrated curved transition. The left handrail 11B extends laterally relative to the left front leg vertical rod 11A, resulting in integrated production and high efficiency. The left rear leg curved rod 12 is arched and inclined, with its upper end welded and fixedly connected to the left front leg vertical rod 11A. The overall structure is simple, has high production efficiency, and is concise and elegant. Casters are installed at the bottom of both the left front leg vertical rod 11A and the left rear leg curved rod 12.

[0062] The right-side frame 3 includes a right-side curved tube 31 and a right-side rear leg curved rod 32. The right-side curved tube 31 includes a right front leg vertical rod 31A and a right handrail rod 31B. The top of the right front leg vertical rod 31A extends backward into the right handrail rod 31B in a single integrated curved transition. The right handrail rod 31B extends laterally relative to the right front leg vertical rod 31A. This integrated design results in high production efficiency. The right-side rear leg curved rod 32 is arched and inclined, with its upper end fixedly connected to the right front leg vertical rod 31A. The overall structure is simple, highly efficient, and aesthetically pleasing. Casters are installed at the bottom of both the right front leg vertical rod 31A and the right front leg vertical rod 31A.

[0063] Preferably, a foldable backrest cushion device 6 is connected at the rear between the left armrest 11B and the right armrest 31B, which is used for people to lie back and lean back for protection after sitting, and to prevent falling out.

[0064] Preferably, the foldable backrest cushion device 6 is a curved soft backrest cushion. The left and right ends of the curved soft backrest cushion are movably connected to the corresponding left armrest 11B and right armrest 31B via screw assemblies, ensuring that the curved soft backrest cushion can be folded and unfolded to the left and right. The curved soft backrest cushion is made of leather or fabric, which is soft and comfortable, wear-resistant and durable, easy to clean, and enhances the user experience.

[0065] Preferably, the rear end of the left handrail 11B is connected to a left trolley handle 11C, which can be rotated 180 degrees to be used forward or backward; the rear end of the right handrail 31B is connected to a right trolley handle 31C, which can be rotated 180 degrees to be used forward or backward.

[0066] Preferably, the lower left corner of the foldable backrest cushion device 6 is connected to a left backrest connector 61, which is fixedly connected to the rear of the left side panel 21 with screws, making the connection more secure and improving safety; the lower right corner of the foldable backrest cushion device 6 is connected to a right backrest connector 62, which is fixedly connected to the rear of the right side panel 23 with screws, making the connection more secure and improving safety.

[0067] Preferably, the foldable backrest cushion device 6 includes an upper left connector, a left vertical shaping rod, a soft pad, an upper right connector, and a right vertical shaping rod. The upper left connector is fixedly connected to the rear of the left armrest 11B by screws, and the upper left connector is fixedly connected to the top of the left vertical shaping rod by screws. The upper right connector is fixedly connected to the rear of the right armrest 31B by screws, and the upper right connector is fixedly connected to the top of the right vertical shaping rod by screws. A soft pad, which is made of cloth or leather, is threaded and fixedly connected between the left and right vertical shaping rods for easy folding.

[0068] The bottom of the left vertical shaping rod is fixedly connected to the rear end of the left backrest connector 61 with screws; the bottom of the right vertical shaping rod is fixedly connected to the rear end of the right backrest connector 62 with screws.

[0069] Preferably, the left half folding plate 41 has a left support extending downwards from the reverse side, and the left and right flat telescopic folding hinge frames 22 are also unfolded. After the left half folding plate 41 is unfolded and flattened, the bottom of the left support is supported by the top of the left front hinge 221, the left rear hinge 222, or the middle X-shaped hinge frame 223, so that the right half folding plate 42 has better load-bearing capacity and the right half folding plate 42 is not easy to bend and deform.

[0070] Preferably, the right half-folding plate 42 has a right support extending from its reverse side. After the right half-folding plate 42 is unfolded and flattened, the left and right flat telescopic folding hinge frames 22 are also unfolded. The bottom of the right support is supported by pressing against the top of the right front hinge 224, the right rear hinge 225, or the middle X-shaped hinge frame 223, which makes the right half-folding plate 42 have better load-bearing capacity and the right half-folding plate 42 less prone to bending and deformation when sitting. After unfolding, the whole is more stable, the seat is evenly stressed, and the comfort and durability during use are ensured.

[0071] Preferably, the left front footrest 11A and the right front footrest 31A are detachably or hingedly connected to a folding footrest. The footrest is made of lightweight alloy material, which is sturdy and durable. It can be folded and stored with the seat, making it easy to carry and further improving the ease of use.

Claims

1. A horizontally folding wheelchair, comprising a left-side frame and a right-side frame, characterized in that: A horizontally hinged folding device is installed between the left and right vehicle frames. The horizontally hinged folding device can be horizontally extended and retracted.

2. The lateral horizontal folding wheelchair according to claim 1, characterized in that: The left and right horizontal flat hinge folding device is laid horizontally flat.

3. A horizontally folding wheelchair according to claim 1 or 2, characterized in that: The left and right horizontal flat hinge folding device includes a left side plate, a left and right horizontal telescopic folding hinge frame, and a right side plate. The left side plate and the right side plate are hinged together by the left and right horizontal telescopic folding hinge frame. The middle part of the left frame is fixedly connected to the left side plate. The middle part of the right frame is fixedly connected to the right side plate.

4. A horizontally folding wheelchair according to claim 3, characterized in that: The left and right flat telescopic folding hinge frame includes a left front hinge, a left rear hinge, a middle X-shaped hinge, a right front hinge, and a right rear hinge. The left front hinge, left rear hinge, middle X-shaped hinge, right front hinge, and right rear hinge are arranged horizontally. The inner sidewall of the left side panel is hinged to one end of the left front hinge and the left rear hinge, respectively, and the left front hinge and the left rear hinge can only be hinged to each other relative to the left side panel. The inner sidewall of the right side panel is hinged to one end of the right front hinge and the right rear hinge, respectively, and the right front hinge and the right rear hinge can only be hinged to each other relative to the right side panel. The other end of the left front hinge and the left rear hinge is hinged to the left front end and the left rear end of the corresponding middle X-shaped hinge. The other end of the right front hinge and the right rear hinge is hinged to the right front end and the right rear end of the corresponding middle X-shaped hinge.

5. A horizontally folding wheelchair according to claim 4, characterized in that: The inner sidewall of the left side plate is connected to the corresponding left front upper end, left front lower end, left rear upper end, and left rear lower end respectively; the left front upper end and left front lower end are vertically aligned; the left rear upper end and left rear lower end are vertically aligned. The left front hinge includes a left front upper link and a left front lower link. The inner ends of the left front upper link and the left front lower link are connected to the corresponding left front upper end and left front lower end. The inner ends of the left front upper link, the left front lower link, the left front upper end, and the left front lower end are vertically connected to a left front vertical hinge shaft. The left front upper link can be hinged back and forth relative to the left front upper end, and the left front lower link can be hinged back and forth relative to the left front lower end. The left rear hinge includes a left rear upper link and a left rear lower link. The inner ends of the left rear upper link and the left rear lower link are connected to the corresponding left rear upper end and left rear lower end. The inner ends of the left rear upper link, the left rear lower link, the left rear upper end, and the left rear lower end are vertically connected to a left rear vertical hinge shaft. The left rear upper link can be hinged back and forth relative to the left rear upper end, and the left rear lower link can be hinged back and forth relative to the left rear lower end. The inner sidewall of the right side plate is connected to the corresponding upper right front end, lower right front end, upper right rear end, and lower right rear end respectively; the upper right front end and lower right front end are vertically aligned; the upper right rear end and lower right rear end are vertically aligned. The right front hinge includes a right front upper link and a right front lower link. The inner ends of the right front upper link and the right front lower link are connected to the corresponding right front upper end and right front lower end. The inner ends of the right front upper link, the right front lower link, the right front upper end, and the right front lower end are vertically connected to a right front vertical hinge shaft. The right front upper link can be hinged back and forth relative to the right front upper end, and the right front lower link can be hinged back and forth relative to the right front lower end. The right rear hinge includes a right rear upper link and a right rear lower link. The inner ends of the right rear upper link and the right rear lower link are connected to the corresponding right rear upper end and right rear lower end. The inner ends of the right rear upper link, the right rear lower link, the right rear upper end, and the right rear lower end are vertically connected to a right rear vertical hinge shaft. The right rear upper link can be hinged back and forth relative to the right rear upper end, and the right rear lower link can be hinged back and forth relative to the right rear lower end. The intermediate X-shaped hinge frame includes an upper intermediate link and a lower intermediate link, with an intermediate hinge shaft vertically connecting the upper intermediate link and the lower intermediate link. The left end of the middle upper connecting rod is inserted between the outer ends of the left rear upper connecting rod and the left rear lower connecting rod. The left end of the middle upper connecting rod, the outer end of the left rear upper connecting rod, and the outer end of the left rear lower connecting rod are all vertically connected to the left rear vertical shaft. The left end of the middle upper connecting rod is connected to the outer ends of the left rear upper connecting rod and the left rear lower connecting rod through the left rear vertical shaft. The left end of the middle lower link is inserted between the outer ends of the left front upper link and the left front lower link. The left end of the middle lower link, the outer ends of the left front upper link and the left front lower link are all vertically connected to the left front vertical shaft. The left end of the middle lower link is connected to the left front upper link and the outer ends of the left front lower link through the left front vertical shaft. The right end of the middle upper connecting rod is inserted between the outer ends of the right front upper connecting rod and the right front lower connecting rod. The right end of the middle upper connecting rod, the outer end of the right front upper connecting rod, and the outer end of the right front lower connecting rod are all vertically connected to the right front vertical shaft. The right end of the middle upper connecting rod is connected to the outer ends of the right front upper connecting rod and the right front lower connecting rod through the right front vertical shaft. The right end of the middle lower connecting rod is inserted between the outer ends of the right rear upper connecting rod and the right rear lower connecting rod. The right end of the middle lower connecting rod, the outer end of the right rear upper connecting rod, and the outer end of the right rear lower connecting rod are all vertically connected to the right rear vertical shaft. The right end of the middle lower connecting rod is connected to the right rear upper connecting rod and the outer ends of the right rear lower connecting rod through the right rear vertical shaft to form a movable hinge connection.

6. A horizontally folding wheelchair according to claim 5, characterized in that: The inner sidewall of the left side plate is connected to corresponding left front middle protrusion and left rear middle protrusion respectively; left front upper end, left front middle protrusion and left front lower end are vertically aligned; left rear upper end, left rear middle protrusion and left rear lower end are vertically aligned. A notch is formed between the upper left front end and the middle left front protrusion, and the inner end of the upper left front connecting rod is inserted into the upper left front notch; a notch is formed between the lower left front end and the middle left front protrusion, and the inner end of the lower left front connecting rod is inserted into the lower left front notch. A left rear upper notch is formed between the left rear upper end and the left rear middle protrusion, and the inner end of the left rear upper connecting rod is inserted into the left rear upper notch; a left rear lower notch is formed between the left rear lower end and the left rear middle protrusion, and the inner end of the left rear lower connecting rod is inserted into the left rear lower notch. The inner sidewall of the right side plate is connected to the corresponding right front middle protrusion and right rear middle protrusion respectively; the right front upper end, right front middle protrusion, and right front lower end are vertically aligned; the right rear upper end, right rear middle protrusion, and right rear lower end are vertically aligned. A right front upper notch is formed between the right front upper end and the right front middle protrusion, and the inner end of the right front upper link is inserted into the right front upper notch; a right front lower notch is formed between the right front lower end and the right front middle protrusion, and the inner end of the right front lower link is inserted into the right front lower notch. A right rear upper notch is formed between the right rear upper end and the right rear middle protrusion, and the inner end of the right rear upper connecting rod is inserted into the right rear upper notch; a right rear lower notch is formed between the right rear lower end and the right rear middle protrusion, and the inner end of the right rear lower connecting rod is inserted into the right rear lower notch.

7. A horizontally folding wheelchair according to claim 3, characterized in that: A seat board is hinged between the left and right side panels, and the seat board is located on top of the horizontally hinged folding device.

8. A horizontally folding wheelchair according to claim 7, characterized in that: The seat panel includes a left half folding panel, a right half folding panel, and a panel hinge shaft. The left edge of the left half folding panel is hinged to the inner wall of the left side panel. The panel hinge shaft passes through the left half folding panel and the right half folding panel, forming a hinged connection between the left half folding panel and the right half folding panel. The right edge of the right half folding panel is hinged to the inner wall of the right side panel.

9. A horizontally folding wheelchair according to claim 3, characterized in that: The left side frame includes a left curved tube and a left rear curved bar. The left curved tube includes a left front vertical bar and a left handrail bar. The top of the left front vertical bar extends backward as an integral part of the left handrail bar. The left handrail bar extends laterally relative to the left front vertical bar. The upper end of the left rear curved bar is fixedly connected to the left front vertical bar. The right side frame includes a right side curved tube and a right rear leg curved bar. The right side curved tube includes a right front leg vertical bar and a right handrail bar. The top of the right front leg vertical bar extends backward as an integral part of the right handrail bar. The right handrail bar extends laterally relative to the right front leg vertical bar. The upper end of the right rear leg curved bar is fixedly connected to the right front leg vertical bar. A foldable backrest cushion is connected at the rear between the left and right handrails.

10. A horizontally folding wheelchair according to claim 9, characterized in that: The rear end of the left handrail is connected to a left trolley handle; the rear end of the right handrail is connected to a right trolley handle; the lower left corner of the foldable backrest cushion device is connected to a left backrest connector, which is connected to the rear of the left side panel; the lower right corner of the foldable backrest cushion device is connected to a right backrest connector, which is connected to the rear of the right side panel.

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