A left and right transverse horizontal type hinged folding device

Abstract

The utility model discloses a left and right horizontal horizontal type hinged folding device, the left side support's front and back wall respectively correspond the left end of left front horizontal hinged piece, left rear horizontal hinged piece of hinged connection, and left front horizontal hinged piece, left rear horizontal hinged piece can only be relative to left side support front and back horizontal swing hinged, the right side support's front and back wall respectively hinged connection has the right end of right front horizontal hinged piece, right rear horizontal hinged piece, and right front horizontal hinged piece, right rear horizontal hinged piece can only be relative to right side support front and back horizontal swing hinged, the right end of left front horizontal hinged piece, left rear horizontal hinged piece is swing hinged with the left front end, left rear end of corresponding intermediate X shape horizontal hinged frame, and the left end of right front horizontal hinged piece, right rear horizontal hinged piece is swing hinged with the right front end, right rear end of corresponding intermediate X shape horizontal hinged frame, this product can left and right horizontal stretch and horizontal contract folding, and the good bearing capacity is stable in structure, and the structure is solid, and convenient operation.

Description

Technical Field

[0001] This utility model relates to a hinged folding frame, and more particularly to a horizontal hinged folding device. Background Technology

[0002] 1. Chinese Patent Publication No. CN205494193U discloses an X-shaped cross-guide folding mechanism for wheelchairs and a wheelchair using the same. The mechanism includes X-shaped cross rods, the lower ends of which are hinged to the side frames of the wheelchair. The upper ends of the X-shaped cross rods are connected to seat support tubes. The two ends of the seat support tubes are respectively mounted on the corresponding side frames via sliders. The seat support tubes and sliders are movably connected. Folding and unfolding of the wheelchair can be achieved by sliding the seat support tubes at the upper ends of the X-shaped cross rods with the side frames, eliminating the need for brake support tubes and the brackets and cross rods mounted on them.

[0003] The X-shaped crossbars disclosed above tilt left and right to form support when unfolded, opening and fixing the left and right sides of the wheelchair frame. When the wheelchair is folded, the X-shaped crossbars close and become vertical. This X-shaped crossbar structure occupies a lot of longitudinal space and is too tall when folded. When unfolded, the space under the wheelchair seat is not spacious enough. When unfolded, there is no lateral support for the wheelchair seat.

[0004] 2. Chinese Patent Publication No. CN220938335U discloses a seat hinge frame for a wheelchair, including an X-shaped cross hinge frame, a left-side connecting rod for the soft pad, a right-side connecting rod for the soft pad, and a seat soft pad; the X-shaped cross hinge frame can be hingedly folded and unfolded; the seat soft pad folds with the folding of the X-shaped cross hinge frame; the seat soft pad unfolds with the unfolding of the X-shaped cross hinge frame; the X-shaped cross hinge frame includes a left tilting rod, a right tilting rod, and a hinge shaft; the left and right sides of the seat soft pad are respectively fixedly connected to the corresponding left-side connecting rod and right-side connecting rod; this seat hinge frame is suitable for use in detachable and assemblable left-right hinged folding wheelchairs; The left tilting rod includes a left tilting lower section and a left tilting upper section. The top of the left tilting upper section is fixedly connected to the rear section of the connecting rod on the right side of the pad. The left tilting lower section and the left tilting upper section are detachably connected. The right tilting rod includes a right tilting lower section and a right tilting upper section. The top of the right tilting upper section is fixedly connected to the rear section of the connecting rod on the left side of the pad. The right tilting lower section and the right tilting upper section are detachably connected. A hinge shaft runs through the upper section of the left tilting lower section and the upper section of the right tilting lower section, forming an X-shaped hinge connection between them. Thus, the left tilting rod and the right tilting rod form an X-shaped cross hinge frame through the hinge shaft.

[0005] The aforementioned X-shaped cross-hinged frame, when unfolded, also tilts left and right to form support, opening and fixing the left and right sides of the wheelchair frame. When the wheelchair is folded, the X-shaped cross-hinged frame closes, and the X-shaped cross-hinged frame becomes vertical. This X-shaped cross-hinged frame structure occupies a lot of longitudinal space and is too tall when folded; when unfolded, the space under the wheelchair seat is not spacious enough; and when unfolded, there is no lateral support for the wheelchair seat. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a horizontal hinged folding device with reasonable structural design, good load-bearing capacity, stable structure, sturdy structure, convenient operation, and suitable for various types of products.

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

[0008] A horizontally hinged folding device includes a left-side support, a right-side support, and a horizontally hinged folding frame. The horizontally hinged folding frame includes a left front horizontal hinge, a left rear horizontal hinge, a middle X-shaped horizontal hinge, a right front horizontal hinge, and a right rear horizontal hinge. These four components are horizontally laid flat. The left front horizontal hinge, left rear horizontal hinge, middle X-shaped horizontal hinge, right front horizontal hinge, and right rear horizontal hinge are respectively hinged to the left ends of the left front and left rear horizontal hinges on the front and rear walls of the left side support. The horizontal hinge and the left rear horizontal hinge can only be hinged horizontally back and forth relative to the left side bracket; the right front horizontal hinge and the right rear horizontal hinge are respectively hinged to the right ends of the right front horizontal hinge and the right rear horizontal hinge on the front and rear walls of the right side bracket, and the right front horizontal hinge and the right rear horizontal hinge can only be hinged horizontally back and forth relative to the right side bracket; the right ends of the left front horizontal hinge and the left rear horizontal hinge are hinged to the left front end and the left rear end of the corresponding middle X-shaped horizontal hinge frame; the left ends of the right front horizontal hinge and the right rear horizontal hinge are hinged to the right front end and the right rear end of the corresponding middle X-shaped horizontal hinge frame.

[0009] The beneficial effects of this utility model's horizontal hinged folding device are as follows: The aforementioned horizontal hinged folding device facilitates the horizontal extension and retraction of connected products; it provides crossbeam support; when unfolded, it has load-bearing capacity for items above (such as seats, pads, trays, etc.); its extension and retraction do not occupy longitudinal space; this product has good load-bearing capacity, a stable and robust structure, and is easy to operate, suitable for various types of products. After folding, it effectively saves space, enhances the user experience, and meets the modern demand for portability and efficiency. Through precise hinge design, this device ensures flexible movement of all components in the horizontal direction, guaranteeing stability and improving folding efficiency. It is suitable for customized production of products of different materials and sizes, further expanding its application range and bringing users a more convenient life experience. Its structure not only enhances the practicality and durability of the product. Attached Figure Description

[0010] Figure 1 , Figure 2 This is a perspective view of the product of this utility model in its unfolded state;

[0011] Figure 3 , Figure 4 This is an exploded view of the product in its unfolded state.

[0012] Figure 5 This is an exploded view of the horizontal hinged folding frame of this utility model product.

[0013] Figure 6 This is a perspective view of the product of this utility model in a folded state;

[0014] Figure 7 This is a perspective view of the folded state of the horizontally hinged folding frame of this utility model.

[0015] Left side bracket 1, left plate frame 11, left front convex end assembly 12, left front upper end 121, left front lower end 122, left front vertical hinge shaft 13, left rear convex end assembly 14, left rear upper end 141, left rear lower end 142, left rear vertical hinge shaft 15, left front blocking protrusion 16, left rear blocking protrusion 17, right side bracket 3, right plate frame 31, right front convex end assembly 32, right front upper end 321, right front lower end 322, right front vertical hinge shaft 33, right rear convex end assembly 34, right rear upper end 341, right rear lower end 342, right rear vertical hinge shaft 35, right front blocking protrusion 36, right rear blocking protrusion 37, left and right horizontal 2. Hinged folding frame, 21. Left front horizontal hinge, 211. Left front upper horizontal link, 212. Left front lower horizontal link, 213. Left front vertical shaft, 214. Left rear horizontal hinge, 221. Left rear upper horizontal link, 222. Left rear lower horizontal link, 223. Left rear vertical shaft, 225. Middle X-shaped horizontal hinge, 231. Middle upper horizontal link, 232. Middle lower horizontal link, 233. Middle hinge shaft, 24. Right front horizontal hinge, 241. Right front upper horizontal link, 242. Right front lower horizontal link, 243. Right front vertical shaft, 25. Right rear horizontal hinge, 251. Right rear upper horizontal link, 252. Right rear lower horizontal link, 253. Detailed Implementation

[0016] like Figures 1 to 7The image shows a horizontally hinged folding device, which can be used in, but is not limited to, medical devices, such as folding wheelchairs, folding beds, folding nursing instruments, folding therapeutic instruments, folding trolleys, and folding handcarts. The device includes a left-side support 1 and a right-side support 3, both made of plastic or metal. The main technical improvement of this product is that it further includes a horizontally hinged folding frame 2, which allows for left and right folding only. The device features horizontal extension and retraction / folding capabilities. The left and right horizontally hinged folding frame 2 includes a left front horizontal hinge 21, a left rear horizontal hinge 22, a middle X-shaped horizontal hinge 23, a right front horizontal hinge 24, and a right rear horizontal hinge 25. In this application, "horizontal" refers to the ability to extend and retract horizontally. The left front horizontal hinge 21, left rear horizontal hinge 22, middle X-shaped horizontal hinge 23, right front horizontal hinge 24, and right rear horizontal hinge 25 are horizontally laid flat to achieve horizontal unfolding and folding. (Left side...) The front and rear walls of bracket 1 are respectively hinged to the left ends of the left front horizontal hinge 21 and the left rear horizontal hinge 22. The left front horizontal hinge 21 and the left rear horizontal hinge 22 can only be hinged horizontally relative to the left side bracket 1. The front and rear walls of the right side bracket 3 are respectively hinged to the right ends of the right front horizontal hinge 24 and the right rear horizontal hinge 25. The right front horizontal hinge 24 and the right rear horizontal hinge 25 can only be hinged horizontally relative to the right side bracket 3. The right ends of the left front horizontal hinge 21 and the left rear horizontal hinge 22 are connected to the corresponding middle... The left front and left rear ends of the intermediate X-shaped horizontal hinge frame 23 are movably hinged; the left ends of the right front horizontal hinge 24 and right rear horizontal hinge 25 are movably hinged to the right front and right rear ends of the corresponding intermediate X-shaped horizontal hinge frame 23; the above-mentioned left and right horizontal hinged folding device facilitates the horizontal extension and retraction of the connected products; this product has good load-bearing capacity, stable and sturdy structure, and convenient operation, suitable for various types of products. After folding, it effectively saves space, improves the user experience, and meets the modern demand for portability and efficiency. Through precise hinge design, this device ensures flexible movement of each component in the horizontal direction, guaranteeing stability and improving folding efficiency. It is suitable for customized production of products of different materials and sizes, further expanding its application range and bringing users a more convenient life experience. Its construction not only enhances the practicality and durability of the product. The horizontal hinged folding device has a crossbeam support function; when unfolded, it has the load-bearing capacity to support the items above (such as: seat plate, pad plate, tray plate, etc.); extending and retracting the folding device does not occupy longitudinal space.

[0017] Preferably, the left side bracket 1 includes a left plate frame 11, a left front convex end assembly 12, a left front vertical hinge shaft 13, a left rear convex end assembly 14, and a left rear vertical hinge shaft 15; the inner wall of the left plate frame 11 extends and protrudes to connect the left front convex end assembly 12 and the left rear convex end assembly 14; the left plate frame 11, the left front convex end assembly 12, and the left rear convex end assembly 14 are integrally formed, and the structure is sturdy;

[0018] The left front vertical hinge shaft 13 passes vertically through the left front convex end assembly 12 and the left front horizontal hinge 21 to form a movable hinge. It is prevented from detaching by the left front vertical hinge shaft 13, which is a screw assembly.

[0019] The left rear vertical hinge shaft 15 passes vertically through the left rear convex end assembly 14 and the left rear horizontal hinge 22 to form a movable hinge. The left rear vertical hinge shaft 15 is used to prevent detachment. The left rear vertical hinge shaft 15 is a screw assembly.

[0020] The above describes the specific hinged connection structure between the left bracket 1 and the left front horizontal hinge 21 and the left rear horizontal hinge 22. The hinge structure is reasonable, simple to set, and has a convex end for better movable connection and anti-detachment. It is easy to install and the hinge is flexible. The hinge structure between the right bracket 3 and the right front horizontal hinge 24 and the right rear horizontal hinge 25 is similar.

[0021] The right-side support 3 includes a right plate frame 31, a right front convex end assembly 32, a right front vertical hinge shaft 33, a right rear convex end assembly 34, and a right rear vertical hinge shaft 35; the inner wall of the right plate frame 31 extends and protrudes to connect the right front convex end assembly 32 and the right rear convex end assembly 34; the right plate frame 31, the right front convex end assembly 32, and the right rear convex end assembly 34 are integrally formed, and the structure is sturdy;

[0022] The right front vertical hinge shaft 33 passes vertically through the right front convex end assembly 32 and the right front horizontal hinge 24 to form a movable hinge. It is prevented from detaching by the right front vertical hinge shaft 33. The left front vertical hinge shaft 13 is a screw assembly.

[0023] The right rear vertical hinge shaft 35 passes vertically through the right rear convex end assembly 34 and the right rear horizontal hinge 25 to form a movable hinge. It is prevented from detaching by the right rear vertical hinge shaft 35. The left front vertical hinge shaft 13 is a screw assembly.

[0024] The above describes the specific hinged connection structure between the right side bracket 3 and the right front horizontal hinge 24 and the right rear horizontal hinge 25. The hinge structure is reasonable, simple to set, has a convex end for better movable connection and anti-detachment, is easy to install, and the hinge is flexible.

[0025] Preferably, the left front convex end assembly 12 includes a left front upper end 121 and a left front lower end 122; the left front horizontal hinge 21 includes a left front upper horizontal connecting rod 211 and a left front lower horizontal connecting rod 212; the left front vertical hinge shaft 13 vertically passes through the left front upper end 121, the left front lower end 122, the left end of the left front upper horizontal connecting rod 211, and the left end of the left front lower horizontal connecting rod 212 to form a movable hinge; the left front horizontal hinge 21 is composed of two left front upper horizontal connecting rods 211 and left front lower horizontal connecting rods 212, which makes it have good load-bearing capacity, more robust and sturdy structure, less prone to loosening, and the movable hinge does not deviate, ensuring the overall structure is stable and durable, improving user experience, and extending service life.

[0026] The left rear convex end assembly 14 includes a left rear upper end 141 and a left rear lower end 142; the left rear horizontal hinge 22 includes a left rear upper horizontal connecting rod 221 and a left rear lower horizontal connecting rod 222; the left rear vertical hinge shaft 15 vertically passes through the left rear upper end 141, the left rear lower end 142, the left end of the left rear upper horizontal connecting rod 221, and the left end of the left rear lower horizontal connecting rod 222 to form a movable hinge; the left rear horizontal hinge 22 is composed of two left rear upper horizontal connecting rods 221 and left rear lower horizontal connecting rods 222, which makes it have good load-bearing capacity, more robust and sturdy structure, less prone to loosening, and the movable hinge does not deviate, ensuring the overall structure is stable and durable, improving user experience and extending service life.

[0027] The right front convex end assembly 32 includes a right front upper end 321 and a right front lower end 322; the right front horizontal hinge 24 includes a right front upper horizontal connecting rod 241 and a right front lower horizontal connecting rod 242; the right front vertical hinge shaft 33 vertically passes through the right front upper end 321, the right front lower end 322, the right end of the right front upper horizontal connecting rod 241, and the right end of the right front lower horizontal connecting rod 242 to form a movable hinge; the right front horizontal hinge 24 is composed of two right front upper horizontal connecting rods 241 and right front lower horizontal connecting rods 242, making the structure more robust and sturdy, less prone to loosening, and the movable hinge does not deviate, ensuring the overall structure is stable and durable, improving user experience, and extending service life.

[0028] The right rear convex end assembly 34 includes a right rear upper end 341 and a right rear lower end 342; the right rear horizontal hinge 25 includes a right rear upper horizontal connecting rod 251 and a right rear lower horizontal connecting rod 252; the right rear vertical hinge shaft 35 vertically passes through the right rear upper end 341, the right rear lower end 342, the right end of the right rear upper horizontal connecting rod 251, and the right end of the right rear lower horizontal connecting rod 252 to form a movable hinge; the right rear horizontal hinge 25 is composed of two right rear upper horizontal connecting rods 251 and right rear lower horizontal connecting rods 252, making the structure more robust and sturdy, less prone to loosening, and the movable hinge does not deviate, ensuring the overall structure is stable and durable, improving user experience, and extending service life.

[0029] The intermediate X-shaped horizontal hinge frame 23 includes an upper intermediate horizontal connecting rod 231 and a lower intermediate horizontal connecting rod 232. The upper intermediate horizontal connecting rod 231 and the lower intermediate horizontal connecting rod 232 have the same length. An intermediate hinge shaft 233 is vertically connected between the upper intermediate horizontal connecting rod 231 and the lower intermediate horizontal connecting rod 232 to form an X-shaped hinge frame. The intermediate X-shaped horizontal hinge frame 23 is laid horizontally and is prevented from detaching by the intermediate hinge shaft 233. The intermediate hinge shaft 233 is a screw assembly.

[0030] The left front upper horizontal link 211 and the left front lower horizontal link 212 are of the same length; the left end of the middle lower horizontal link 232 is sandwiched between the right ends of the left front upper horizontal link 211 and the left front lower horizontal link 212; the right ends of the left front upper horizontal link 211, the right ends of the left front lower horizontal link 212, and the left ends of the middle lower horizontal link 232 are all vertically connected to the left front vertical shaft 213 to form a movable hinge, forming the left front hinge point;

[0031] The left rear upper horizontal connecting rod 221 and the left rear lower horizontal connecting rod 222 are of the same length; the left end of the middle upper horizontal connecting rod 231 is sandwiched between the right ends of the left rear upper horizontal connecting rod 221 and the left rear lower horizontal connecting rod 222, and the right ends of the left rear upper horizontal connecting rod 221, the right ends of the left rear lower horizontal connecting rod 222, and the left ends of the middle upper horizontal connecting rod 231 are vertically connected to the left rear vertical shaft rod 223 to form a movable hinge, forming the left rear hinge point;

[0032] The right front upper horizontal link 241 and the right front lower horizontal link 242 are of the same length; the right end of the middle upper horizontal link 231 is sandwiched between the right ends of the right front upper horizontal link 241 and the right front lower horizontal link 242; the left ends of the right front upper horizontal link 241, the left ends of the right front lower horizontal link 242, and the right ends of the middle upper horizontal link 231 are all vertically connected to the right front vertical shaft 243 to form a movable hinge, forming the right front hinge point;

[0033] The right rear upper horizontal connecting rod 251 and the right rear lower horizontal connecting rod 252 are of the same length; the left end of the middle lower horizontal connecting rod 232 is sandwiched between the left ends of the right rear upper horizontal connecting rod 251 and the right rear lower horizontal connecting rod 252, and the left ends of the right rear upper horizontal connecting rod 251, the left ends of the right rear lower horizontal connecting rod 252, and the right ends of the middle lower horizontal connecting rod 232 are vertically connected to the right rear vertical shaft rod 253 to form a movable hinge, thus forming the right rear hinge point.

[0034] The overall structure has good load-bearing capacity, is not weak in the middle, is sturdy and robust, is not easy to loosen, and the movable hinges do not deviate, ensuring the overall structure is stable and durable, improving user experience and extending service life.

[0035] A left front blocking protrusion 16 extends from the rear wall near the left front protruding end assembly 12. The left front blocking protrusion 16 is integrally formed with the left plate frame 11. The left front blocking protrusion 16 is used to block the left front horizontal hinge 21 from moving and rotating backward. The included angle between the left front blocking protrusion 16 and the left plate frame 11 is 90 degrees to prevent the left front horizontal hinge 21 from rotating after transition. The maximum rotation angle of the left front horizontal hinge 21 is 90 degrees, and it generally rotates 30 to 70 degrees to extend and fold.

[0036] A left rear blocking protrusion 17 extends from the front wall near the left rear protruding end assembly 14. The left rear blocking protrusion 17 is integrally formed with the left plate frame 11. The left rear blocking protrusion 17 is used to block the left rear horizontal hinge 22 from moving forward and rotating.

[0037] The angle between the left rear blocking protrusion 17 and the left plate frame 11 is 90 degrees to prevent the left rear horizontal hinge 22 from rotating after transition. The maximum rotation angle of the left rear horizontal hinge 22 is 90 degrees, and it can generally rotate 30 to 70 degrees to extend and fold.

[0038] A protrusion 36 extends from the rear wall near the right front protruding end assembly 32. The right front blocking protrusion 36 is integrally formed with the left plate frame 11. The right front blocking protrusion 36 is used to prevent the right front horizontal hinge 24 from rotating backward. The included angle between the right front blocking protrusion 36 and the right plate frame 31 is 90 degrees to prevent the right front horizontal hinge 24 from rotating after transition. The maximum rotation angle of the right front horizontal hinge 24 is 90 degrees, and it generally rotates 30 to 70 degrees to extend and fold.

[0039] A right rear blocking protrusion 37 extends from the front wall near the right rear protruding end assembly 34. The right rear blocking protrusion 37 is integrally formed with the left plate frame 11. The right rear blocking protrusion 37 is used to prevent the right rear horizontal hinge member 25 from moving and rotating backward. The included angle between the right rear blocking protrusion 37 and the right plate frame 31 is 90 degrees to prevent the right rear horizontal hinge member 25 from rotating after transition. The maximum rotation angle of the right rear horizontal hinge member 25 is 90 degrees, and it generally rotates 30 to 70 degrees to extend and fold.

[0040] The lengths of the left front horizontal hinge 21, left rear horizontal hinge 22, right front horizontal hinge 24, and right rear horizontal hinge 25 are 35% to 60% of the length of the middle X-shaped horizontal hinge frame 23. By setting a suitable length ratio, the hinged folds are shorter and tighter, resulting in better stacking.

[0041] Preferably, the lengths of the left front horizontal hinge 21, left rear horizontal hinge 22, right front horizontal hinge 24, and right rear horizontal hinge 25 are 45%, 50%, or 55% of the length of the middle X-shaped horizontal hinge frame 23.

[0042] Preferably, the rods of the left front upper horizontal link 211, left front lower horizontal link 212, left rear upper horizontal link 221, left rear lower horizontal link 222, right front upper horizontal link 241, right front lower horizontal link 242, right rear upper horizontal link 251, right rear lower horizontal link 252, middle upper horizontal link 231, and middle lower horizontal link 232 are rectangular; their rectangular rod design enhances the stability and durability of the overall structure, ensuring good performance during frequent folding and stretching.

[0043] Preferably, the left front upper horizontal link 211, left front lower horizontal link 212, left rear upper horizontal link 221, left rear lower horizontal link 222, right front upper horizontal link 241, right front lower horizontal link 242, right rear upper horizontal link 251, right rear lower horizontal link 252, middle upper horizontal link 231, and middle lower horizontal link 232 are made of metal tubing, preferably aluminum, which is lightweight.

[0044] Preferably, the distance between the left front convex end assembly 12 and the left rear convex end assembly 14 is 5 cm to 25 cm, preferably 10 cm, to facilitate folding and unfolding. The distance between the right front convex end assembly 32 and the right rear convex end assembly 34 is 5 cm to 25 cm, preferably 10 cm, to facilitate folding and unfolding.

Claims

1. A horizontally hinged folding device, comprising a left-side support and a right-side support, characterized in that: It also includes a horizontally hinged folding frame; the horizontally hinged folding frame includes a left front horizontal hinge, a left rear horizontal hinge, a middle X-shaped horizontal hinge, a right front horizontal hinge, and a right rear horizontal hinge; the left front horizontal hinge, left rear horizontal hinge, middle X-shaped horizontal hinge, right front horizontal hinge, and right rear horizontal hinge are arranged horizontally; the left front and left rear horizontal hinges are respectively hinged to the left ends of the left front horizontal hinge and the left rear horizontal hinge on the front and rear walls of the left side bracket. It can only be horizontally hinged relative to the left support; the front and rear walls of the right support are respectively hinged to the right ends of the right front horizontal hinge and the right rear horizontal hinge, which can only be horizontally hinged relative to the right support; the right ends of the left front horizontal hinge and the left rear horizontal hinge are movably hinged to the left front end and the left rear end of the corresponding middle X-shaped horizontal hinge frame; the left ends of the right front horizontal hinge and the right rear horizontal hinge are movably hinged to the right front end and the right rear end of the corresponding middle X-shaped horizontal hinge frame.

2. The horizontal hinged folding device according to claim 1, characterized in that: The left-side support includes a left plate frame, a left front convex end assembly, a left front vertical hinge shaft, a left rear convex end assembly, and a left rear vertical hinge shaft; the inner wall of the left plate frame extends and protrudes to connect the left front convex end assembly and the left rear convex end assembly. The left front vertical hinge shaft passes vertically through the left front convex end assembly and the left front horizontal hinge to form a movable hinge; The left rear vertical hinge shaft passes vertically through the left rear convex end assembly and the left rear horizontal hinge to form a movable hinge; The right-side support includes a right plate frame, a right front convex end assembly, a right front vertical hinge shaft, a right rear convex end assembly, and a right rear vertical hinge shaft; the inner wall of the right plate frame extends and protrudes to connect the right front convex end assembly and the right rear convex end assembly. The right front vertical hinge shaft passes vertically through the right front convex end assembly and the right front horizontal hinge to form a movable hinge; The right rear vertical hinge shaft passes vertically through the right rear convex end assembly and the right rear horizontal hinge to form a movable hinge.

3. The horizontal hinged folding device according to claim 2, characterized in that: The left front convex end assembly includes a left front upper end and a left front lower end; the left front horizontal hinge includes a left front upper horizontal link and a left front lower horizontal link; the left front vertical hinge shaft passes vertically through the left front upper end, the left front lower end, the left end of the left front upper horizontal link, and the left end of the left front lower horizontal link to form a movable hinge. The left rear convex end assembly includes a left rear upper end and a left rear lower end; the left rear horizontal hinge includes a left rear upper horizontal connecting rod and a left rear lower horizontal connecting rod; the left rear vertical hinge shaft passes vertically through the left rear upper end, the left rear lower end, the left end of the left rear upper horizontal connecting rod, and the left end of the left rear lower horizontal connecting rod to form a movable hinge. The right front convex end assembly includes a right front upper end and a right front lower end; the right front horizontal hinge includes a right front upper horizontal link and a right front lower horizontal link; the right front vertical hinge shaft passes vertically through the right front upper end, the right front lower end, the right end of the right front upper horizontal link, and the right end of the right front lower horizontal link to form a movable hinge. The right rear convex end assembly includes a right rear upper end and a right rear lower end; the right rear horizontal hinge includes a right rear upper horizontal connecting rod and a right rear lower horizontal connecting rod; the right rear vertical hinge shaft passes vertically through the right rear upper end, the right rear lower end, the right end of the right rear upper horizontal connecting rod, and the right end of the right rear lower horizontal connecting rod to form a movable hinge. The intermediate X-shaped horizontal hinge frame includes an upper intermediate horizontal connecting rod and a lower intermediate horizontal connecting rod, with an intermediate hinge shaft vertically connecting the upper intermediate horizontal connecting rod and the lower intermediate horizontal connecting rod. The left end of the middle lower horizontal link is sandwiched between the right ends of the left front upper horizontal link and the left front lower horizontal link. The right ends of the left front upper horizontal link, the right ends of the left front lower horizontal link, and the left ends of the middle lower horizontal link are all vertically connected to the left front vertical shaft to form a movable hinge. The left end of the middle upper horizontal link is sandwiched between the right ends of the left rear upper horizontal link and the left rear lower horizontal link. The right ends of the left rear upper horizontal link, the right ends of the left rear lower horizontal link, and the left ends of the middle upper horizontal link are all vertically connected to the left rear vertical shaft to form a movable hinge. The right end of the middle upper horizontal link is sandwiched between the right ends of the right front upper horizontal link and the right front lower horizontal link. The left ends of the right front upper horizontal link, the left ends of the right front lower horizontal link, and the right ends of the middle upper horizontal link are all vertically connected to the right front vertical shaft to form a movable hinge. The left end of the middle lower horizontal link is sandwiched between the left ends of the upper right rear horizontal link and the lower right rear horizontal link. The left ends of the upper right rear horizontal link, the lower right rear horizontal link, and the middle lower horizontal link are all vertically connected to the right rear vertical shaft to form a movable hinge.

4. A horizontal hinged folding device according to claim 2 or 3, characterized in that: A left front blocking protrusion extends from the rear wall near the left front end assembly. The left front blocking protrusion is used to prevent the left front horizontal hinge from moving and rotating backward.

5. A horizontal hinged folding device according to claim 2 or 3, characterized in that: A left rear blocking protrusion extends from the front wall near the left rear convex end assembly. The left rear blocking protrusion is used to prevent the left rear horizontal hinge from moving forward and rotating.

6. A horizontal hinged folding device according to claim 2 or 3, characterized in that: A right front blocking protrusion extends from the rear wall near the right front protruding end assembly. The right front blocking protrusion is used to prevent the right front horizontal hinge from moving and rotating backward.

7. A horizontal hinged folding device according to claim 2 or 3, characterized in that: A right rear blocking protrusion extends from the front wall near the right rear convex end assembly. The right rear blocking protrusion is used to prevent the right rear horizontal hinge from moving and rotating backward.

8. A horizontal hinged folding device according to claim 2 or 3, characterized in that: The lengths of the left front horizontal hinge, left rear horizontal hinge, right front horizontal hinge, and right rear horizontal hinge are 35% to 60% of the length of the middle X-shaped horizontal hinge frame.

9. A horizontal hinged folding device according to claim 3, characterized in that: The rods of the left front upper horizontal link, left front lower horizontal link, left rear upper horizontal link, left rear lower horizontal link, right front upper horizontal link, right front lower horizontal link, right rear upper horizontal link, right rear lower horizontal link, middle upper horizontal link, and middle lower horizontal link are rectangular.

10. A horizontal hinged folding device according to claim 3 or 9, characterized in that: The left front upper horizontal link, left front lower horizontal link, left rear upper horizontal link, left rear lower horizontal link, right front upper horizontal link, right front lower horizontal link, right rear upper horizontal link, right rear lower horizontal link, middle upper horizontal link, and middle lower horizontal link are made of metal tubing. The distance between the left front convex end assembly and the left rear convex end assembly is 5 cm to 25 cm, and the distance between the right front convex end assembly and the right rear convex end assembly is 5 cm to 25 cm.

Images