Wheelchair frame hinged folding device

Abstract

The utility model discloses an articulated folding device for a wheelchair frame, wherein the front part of the left rear frame of the product is connected to the left frame articulated connecting device, the left frame articulated connecting device is connected to the rear part of the left front frame, and the left front frame can be turned over and folded toward the outside or inside of the left rear frame through the left frame articulated connecting device; the front part of the right rear frame is connected to the right frame articulated connecting device, the right frame articulated connecting device is connected to the rear part of the right front frame, and the right front frame can be turned over and folded toward the outside or inside of the right rear frame through the right frame articulated connecting device; when the product is packed at the factory and not in use by the user and is carried out, the left front frame is turned over and folded to shorten the length of the left frame; the right front frame is turned over and folded to shorten the length of the right frame; after the frames on the left and right sides are folded, the overall length of the frames is shortened, the packaging volume is compressed, the packaging is more compact, the length of the packaging box is reduced, and the space hollowed out inside the packaging is reduced, so that transportation is convenient.

Description

Technical Field

[0001] The utility model relates to a frame device of a foldable wheelchair, in particular to an articulated folding device for a wheelchair frame. Background Art

[0002] For example 1: Chinese patent document publication number: CN117731494A, discloses a left-right foldable wheelchair, including a side bracket, a wheel assembly, a seat assembly, and a locking mechanism. The side bracket includes a bottom support rod, a seat support rod, a rear upright rod, and a front connecting rod. The seat assembly includes first to fourth rods extending in the left-right direction. The first rod, the second rod, the third rod, the fourth rod and the seat support rods on both sides form a first six-link mechanism, so that the seat assembly also includes a first connecting rod and a second connecting rod that cross in an X shape, so that the front end of the first connecting rod is rotatably connected to the middle of the first rod, the rear end of the first connecting rod is rotatably connected to the middle of the fourth rod, the front end of the second connecting rod is rotatably connected to the middle of the second rod, and the rear end of the second connecting rod is rotatably connected to the middle of the third rod; when the locking mechanism is unlocked, the side brackets on both sides can be moved closer to each other in the left-right direction, so that the first and second connecting rods drive the first six-link mechanism to move, thereby realizing left-right folding. The structure is novel and the space occupied after folding is small.

[0003] For example 2: Chinese patent document announcement number: CN220860253U, discloses a folding wheelchair, which has a right bracket assembly and a left bracket assembly, and the right bracket assembly and the left bracket assembly are hingedly connected by a cross piece, and the folding wheelchair includes: a footrest assembly, the footrest assembly includes a footrest rod, and the footrest rod is respectively mounted on the front end of the right bracket assembly and the left bracket assembly, and the footrest rod is separately arranged from the right bracket assembly and the left bracket assembly; a push handle assembly, which is respectively mounted on the upper rear end of the right bracket assembly and the left bracket assembly, and the push handle assembly includes a push handle rod, and the push handle rod is foldably mounted on the right bracket assembly and the left bracket assembly; the folding wheelchair can be arranged or placed in multiple layers after being folded, and the footrest assembly is separately installed in the cabinet, which can better utilize the space, and the push handle rod will not affect the space when placed, thereby compressing the placement space of the container, improving space utilization, and reducing the transportation cost of shipment.

[0004] The folding wheelchairs of example 1 and example 2 above are all foldable, and the left and right side frames cannot be folded and shortened. When the products are packaged by the manufacturer, larger cartons are used, which occupy the packaging volume and storage volume. Furthermore, many elderly people need to go out, and they need to carry the wheelchair with them. When they take a car, they need to put it in the trunk of the car, which is too big to place. When they take the high-speed rail or buy a mobile phone, they need to carry it, and it is troublesome to carry and store it because it is too big. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a wheelchair frame articulated folding device with reasonable structural design and capable of articulating and folding the frame to shorten the frame length and compress and package the frame.

[0006] The solutions to the above technical problems are:

[0007] A wheelchair frame articulated folding device comprises a left rear frame, a left frame articulated connecting device, a left front frame, a right rear frame, a right frame articulated connecting device and a right front frame, wherein the front portion of the left rear frame is connected to the left frame articulated connecting device, the left frame articulated connecting device is connected to the rear portion of the left front frame, and the left front frame can be flipped and folded toward the outside or inside of the left rear frame through the left frame articulated connecting device; the front portion of the right rear frame is connected to the right frame articulated connecting device, the right frame articulated connecting device is connected to the rear portion of the right front frame, and the right front frame can be flipped and folded toward the outside or inside of the right rear frame through the right frame articulated connecting device.

[0008] The beneficial effects of the hinged folding device of the wheelchair frame of the utility model are as follows: when the product is packed at the factory and not in use by the user and is carried out, the left front frame can be folded together by flipping the left rear frame through the left frame hinge connection device to shorten the length of the left frame; the right front frame can be folded together by flipping the right rear frame through the right frame hinge connection device to shorten the length of the right frame; after the left and right frames are folded, the overall length of the frames is shortened, the packaging volume is compressed, the packaging is more compact and strict, the length of the packaging box is reduced, and the hollow space of the internal packaging is reduced; transportation is convenient; when in use, the left front frame is flipped open to make the left rear frame and the left front frame arranged in the same axial direction straighten to achieve the original required length; the right front frame is flipped open to make the right rear frame and the right front frame arranged in the same axial direction straighten to achieve the original required length; the overall use is convenient, folding is convenient, and flipping, folding and unfolding are convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a three-dimensional diagram of the product of the utility model, the left front frame and the right front frame are turned outward and folded, and the left locking and unlocking device and the right locking and unlocking device are installed on the inner side of the frame;

[0010] Figure 2 , Figure 3 It is a three-dimensional diagram of the product of the utility model, wherein Figure 3 In the outward-turned folded state;

[0011] Figure 4 , Figure 5 This is a disassembled diagram of the product of the utility model. The left front frame and the right front frame are turned outward and folded, and the left locking and unlocking device and the right locking and unlocking device are installed on the inner side of the frame;

[0012] Figure 6 This is a disassembled diagram of the X-shaped seat hinge frame and the soft seat cushion of the utility model product;

[0013] Figure 7 The utility model product includes a seat left rear section rod, a seat left hinge connection device, a seat left front section rod, a seat right rear section rod, a seat right hinge connection device, and a seat right front section rod of an X-shaped seat hinge frame;

[0014] Figure 8 The utility model product includes a seat left rear section rod of an X-shaped seat articulated frame, a seat left articulated connecting device, a seat left front section rod, a seat right rear section rod, a seat right articulated connecting device, a seat right front section rod, and a folded state diagram of a soft seat cushion

[0015] Fig. 9 It is a three-dimensional diagram of the wheelchair of the utility model, the left front frame and the right front frame are turned outward and folded, and the left locking and unlocking device and the right locking and unlocking device are installed on the inner side of the frame;

[0016] Fig.10 This is a folding reference diagram of the wheelchair of the utility model. The left front frame and the right front frame are turned outward and folded, and the left locking and unlocking device and the right locking and unlocking device are installed on the inner side of the frame;

[0017] Fig.11 , Fig.12 This is a three-dimensional diagram of the frame of the utility model product. The left front frame and the right front frame are flipped inward and folded. The left locking and unlocking device and the right locking and unlocking device are installed on the outside of the frame. Fig.12 In the inwardly turned folded state;

[0018] Fig.13 This is a folding reference diagram of the wheelchair of the utility model. The left front frame and the right front frame are turned inward and folded. The left locking and unlocking device and the right locking and unlocking device are installed on the outside of the frame.

[0019] Fig.14 , Fig.15 It is a three-dimensional diagram of the product of the utility model. The left front frame and the right front frame are turned outward and folded. The upper left rear joint and the upper left front joint are connected with an upper left joint locking and unlocking device, the lower left rear joint and the lower left front joint are connected with a lower left joint locking and unlocking device, the upper right rear joint and the upper right front joint are connected with an upper right joint locking and unlocking device, and the lower right rear joint and the lower right front joint are connected with a lower right joint locking and unlocking device;

[0020] Fig.16 , Fig.17This is a disassembled diagram of the product of the utility model. The upper left joint locking and unlocking device is connected to the upper left rear joint and the upper left front joint, the lower left joint locking and unlocking device is connected to the lower left rear joint and the lower left front joint, the upper right joint locking and unlocking device is connected to the upper right rear joint and the upper right front joint, and the lower right joint locking and unlocking device is connected to the lower right rear joint and the lower right front joint;

[0021] Fig.18 It is a three-dimensional diagram of the frame of the utility model product;

[0022] Fig.19 A three-dimensional diagram of the wheelchair of the utility model;

[0023] Fig. 20 A folding reference diagram of the wheelchair of the utility model;

[0024] Fig.21 It is a three-dimensional diagram of the product of the utility model. The left front frame and the right front frame are turned inward and folded. The upper left rear joint and the upper left front joint are connected with an upper left joint locking and unlocking device, the lower left rear joint and the lower left front joint are connected with a lower left joint locking and unlocking device, the upper right rear joint and the upper right front joint are connected with an upper right joint locking and unlocking device, and the lower right rear joint and the lower right front joint are connected with a lower right joint locking and unlocking device;

[0025] Fig. 22 This is a folding reference diagram of the frame of the utility model product, in which the left front frame and the right front frame are turned inward and folded;

[0026] Fig.23The three-dimensional diagram of the wheelchair of the utility model, the left front frame and the right front frame are turned inward and folded. The left rear frame 1A, the left frame articulated connection device 1B, the left front frame 1C, the left locking and unlocking device 1D, the right rear frame 2A, the right frame articulated connection device 2B, the right front frame 2C, the right locking and unlocking device 2D, the left fixed connection member 1D1, the left connecting shaft 1D2, the left upper lock hook member 1D3, the left fixed lock hook 1D4, the right fixed connection member 2D1, the right connecting shaft 2D2, the right upper lock hook member 2D3, the right fixed lock hook 2D4, the left upper articulated connection device 1B1, the left lower articulated connection device 1B2, the left upper rear joint 1B11, the left upper shaft pin 1B12, the left upper front joint 1B 13. Left lower rear joint 1B21, left lower axle pin 1B22, left lower front joint 1B23, right upper hinged connection device 2B1, right lower hinged connection device 2B2, right upper rear joint 2B11, right upper axle pin 2B12, right upper front joint 2B13, right lower rear joint 2B21, right lower axle pin 2B22, right lower front joint 2B23, left oblique rod connecting tube 31, left tilting rod 32, central hinge axis 33, right oblique rod connecting tube 34, right tilting rod 35, left connecting lug 4, left lower bolt 41, right connecting lug 5, right lower bolt 51, seat left rear section rod 6A, seat left hinge Connecting device 6B, seat left front section rod 6C, seat right rear section rod 7A, seat right hinged connecting device 7B, seat right front section rod 7C, left first joint 6B1, left rod axle pin 6B2, left second joint 6B3, right first joint 7B1, right rod axle pin 7B2, right second joint 7B3, soft seat cushion 8, left bearing positioning piece 1 81, left supporting positioning piece 2 82, left supporting positioning piece 3 83 left groove 1 811, left groove 2 812, left groove 3 813 right bearing positioning piece 1 91, right supporting positioning piece 2 92 right supporting positioning piece 3 93 right groove 1 911, right groove 2 912, right Groove three 913, upper left joint locking and unlocking device E upper left joint fixing piece E1, upper left joint axis nail E2, upper left joint locking hook E3, upper left joint buckle hook E4, lower left joint locking and unlocking device F lower left joint fixing piece F1, lower left joint axis nail F2, lower left joint locking hook F3, lower left joint buckle hook F4, upper right joint locking and unlocking device G upper right joint fixing piece G1, upper right joint axis nail G2, upper right joint locking hook G3, upper right joint buckle hook G4, lower right joint locking and unlocking device H lower right joint fixing piece H1, lower right joint axis nail H2, lower right joint locking hook H3, lower right joint buckle hook H4. DETAILED DESCRIPTION

[0027] like Figure 1 to Figure 23As shown: a wheelchair frame articulated folding device, which belongs to a wheelchair component and can be used for an electric wheelchair or a hand-pushed wheelchair; it includes a left rear frame 1A, a left frame articulated connecting device 1B, a left front frame 1C, a right rear frame 2A, a right frame articulated connecting device 2B, and a right front frame 2C; the left rear frame 1A, the left front frame 1C, the right rear frame 2A, and the right front frame 2C are not limited to being made of aluminum or iron metal, nor are the shapes of the parts used in the frame body limited, such as: square, round, and the whole is a flat side frame; the main technical improvement of this product is : The front part of the left rear frame 1A is connected to the left frame articulated connection device 1B, and the left frame articulated connection device 1B is connected to the rear part of the left front frame 1C, and the left front frame 1C can be flipped and folded to the outside or inside of the left rear frame 1A through the left frame articulated connection device 1B; the front part of the right rear frame 2A is connected to the right frame articulated connection device 2B, and the right frame articulated connection device 2B is connected to the rear part of the right front frame 2C, and the right front frame 2C can be flipped and folded to the outside or inside of the right rear frame 2A through the right frame articulated connection device 2B.

[0028] When the product is packed at the factory and not in use or carried out by the user, the left front frame 1C can be flipped and folded together toward the left rear frame 1A through the left frame hinge connection device 1B to shorten the length of the left frame; the right front frame 2C can be flipped and folded together toward the right rear frame 2A through the right frame hinge connection device 2B to shorten the length of the right frame; after the left and right frames are folded, the overall length of the frames is shortened, the packaging volume is compressed, the packaging is more compact and strict, the length of the packaging box is reduced, and the hollow space of the internal packaging is reduced, which is convenient for transportation; when in use, the left front frame 1C is flipped open to make the left rear frame 1A and the left front frame 1C arranged in the same axial direction straighten to achieve the original required length; the right front frame 2C is flipped open to make the right rear frame 2A and the right front frame 2C arranged in the same axial direction straighten to achieve the original required length; the overall use is convenient, folding is convenient, and flipping, folding and unfolding are convenient.

[0029] When the hinge base point of the left frame articulated connection device 1B is set on the outside, the left front frame 1C can be turned over and folded to the outside of the left rear frame 1A through the left frame articulated connection device 1B more appropriately, the turning space is sufficient, and it is relatively flat after folding; when the hinge base point of the left frame articulated connection device 1B is set on the inside, the left front frame 1C can be turned over and folded to the inside of the left rear frame 1A more appropriately through the left frame articulated connection device 1B, the turning space is sufficient, and it is relatively flat after folding; when the hinge base point of the right frame articulated connection device 2B is set on the outside, the right front frame 2C can be turned over and folded to the outside of the right rear frame 2A more appropriately through the right frame articulated connection device 2B, the turning space is sufficient, and it is relatively flat after folding; when the hinge base point of the right frame articulated connection device 2B is set on the inside, the right front frame 2C can be turned over and folded to the inside of the right rear frame 2A more appropriately through the right frame articulated connection device 2B, the turning space is sufficient, and it is relatively flat after folding.

[0030] The rear lower outer side portion of the left rear frame 1A is bent inward and concave a little, so as to facilitate the installation of the left rear caster of the wheelchair, and to facilitate the left front frame 1C to be flipped outward and folded with the left front caster of the wheelchair; the rear lower outer side portion of the side rear frame 2A is bent inward and concave a little, so as to facilitate the installation of the right rear caster of the wheelchair, and to facilitate the folding of the right front frame 2C with the right front caster of the wheelchair.

[0031] The preferred technical solution is further: Figures 1 to 10 As shown: a left locking and unlocking device 1D is connected between the front part of the left rear frame 1A and the rear part of the left front frame 1C; after the left front frame 1C is unfolded, the left locking and unlocking device 1D is locked so that it cannot be flipped and folded, thereby fixing the left rear frame 1A and the left front frame 1C, so that the vehicle can be used normally and prevent the left rear frame 1A from flipping and folding in a natural state; after the left locking and unlocking device 1D is unlocked, the left front frame 1C can be flipped and folded, which is convenient for flipping and folding;

[0032] There are two left locking and unlocking devices 1D, one left locking and unlocking device 1D is connected to the top between the front of the left rear frame 1A and the rear of the left front frame 1C, and one left locking and unlocking device 1D is connected to the bottom between the front of the left rear frame 1A and the rear of the left front frame 1C, a total of two;

[0033] A right locking and unlocking device 2D is connected between the front portion of the right rear frame 2A and the rear portion of the right front frame 2C; after the right front frame 2C is unfolded, the right locking and unlocking device 2D is locked so that it cannot be flipped and folded, thereby fixing the right rear frame 2A and the right front frame 2C, so that the vehicle can be used normally and prevent the right rear frame 2A from flipping and folding in a natural state; only after the right locking and unlocking device 2D is unlocked can the right front frame 2C be flipped and folded, which is convenient for flipping and folding.

[0034] There are two right locking and unlocking devices 2D, one right locking and unlocking device 2D is connected to the top between the front of the right rear frame 2A and the rear of the right front frame 2C, and the other right locking and unlocking device 2D is connected to the bottom between the front of the right rear frame 2A and the rear of the right front frame 2C, for a total of two.

[0035] The preferred technical solution is further: Figures 1 to 10 As shown: the left locking and unlocking device 1D comprises a left fixed connecting member 1D1, a left connecting shaft 1D2, a left upper lock hook 1D3, and a left fixed lock hook 1D4; the left fixed connecting member 1D1 and the left upper lock hook 1D3 are connected with the left connecting shaft 1D2, so that the left upper lock hook 1D3 is movably connected to the left fixed connecting member 1D1; the front part of the left rear frame 1A is fixedly connected to the left fixed lock hook 1D4 by a screw assembly or welding; the rear part of the left front frame 1C is fixedly connected to the left fixed connecting member 1D1 by a screw assembly or welding; the left front frame 1 After C is unfolded into place, the left rear frame 1A and the left front frame 1C become arranged in the same axial direction and can be locked. When locking, the left upper lock hook 1D3 is fixedly hooked on the left fixed lock hook 1D4 by manual operation to tighten and prevent it from falling off; when unlocking, the left upper lock hook 1D3 is unlocked and removed from the left fixed lock hook 1D4 by manual operation, and the left front frame 1C can be flipped and folded based on the left connecting shaft 1D2; the above is the specific structure of the left locking and unlocking device 1D, which is simple in structure, highly practical, easy to assemble, easy to lock and unlock, and convenient for users to lock and unlock.

[0036] The right locking and unlocking device 2D comprises a right fixed connector 2D1, a right connecting shaft 2D2, a right upper locking hook 2D3 and a right fixed lock hook 2D4; the right fixed connector 2D1 and the right upper locking hook 2D3 are connected with the right connecting shaft 2D2 so that the right upper locking hook 2D3 is movably connected to the right fixed connector 2D1; the front part of the right rear frame 2A is fixedly connected to the right fixed lock hook 2D4 by a screw assembly or welding; the rear part of the right front frame 2C is fixedly connected to the right fixed connector 2D1 by a screw assembly or welding to hook and prevent it from falling off; After the front frame 2C is unfolded into place, the right rear frame 2A and the right front frame 2C become arranged in the same axial direction and can be locked. When locking, the right upper locking hook 2D3 is fixedly hooked on the right fixed locking hook 2D4 by manual operation; when unlocking, the right upper locking hook 2D3 is unlocked and disengaged from the right fixed locking hook 2D4 by manual operation, and the right front frame 2C can be flipped and folded based on the right connecting shaft 2D2; the above is the specific structure of the right locking and unlocking device 2D, which is simple in structure, highly practical, easy to assemble, easy to lock and unlock, and convenient for users to lock and unlock.

[0037] The preferred technical solution is further: Figure 1 to Figure 23As shown: the left frame articulated connection device 1B includes an upper left articulated connection device 1B1 and a lower left articulated connection device 1B2;

[0038] The upper left hinged connection device 1B1 comprises an upper left rear joint 1B11, an upper left axle pin 1B12, and an upper left front joint 1B13. The upper left rear joint 1B11 and the upper left front joint 1B13 are both connected with the upper left axle pin 1B12, so that the upper left rear joint 1B11 and the upper left front joint 1B13 are movably connected; the front upper part of the left rear frame 1A is fixedly connected to the upper left rear joint 1B11 by screws, welding or plugging, and the upper left front joint 1B13 is fixedly connected to the upper left rear part of the left front frame 1C by screws, welding or plugging; the above is the specific structure of the upper left hinged connection device 1B1, which is simple in structure, strong in practicality, easy to assemble, and easy to flip;

[0039] The lower left hinged connection device 1B2 comprises a lower left rear joint 1B21, a lower left axle pin 1B22, and a lower left front joint 1B23. The lower left rear joint 1B21 and the lower left front joint 1B23 are both connected with the lower left axle pin 1B22, so that the lower left rear joint 1B21 and the lower left front joint 1B23 are movably connected; the front lower part of the left rear frame 1A is fixedly connected to the lower left rear joint 1B21 by screws, welding or plugging, and the lower left front joint 1B23 is fixedly connected to the rear lower part of the left front frame 1C by screws, welding or plugging; the above is the specific structure of the lower left hinged connection device 1B2, which is simple in structure, strong in practicality, easy to assemble, and easy to flip;

[0040] The left front frame 1C is turned over and folded toward the outside or inside of the left rear frame 1A based on the left upper axle pin 1B12 and the left lower axle pin 1B22.

[0041] The above-mentioned left frame articulated connection device 1B makes the connection between the left rear frame 1A and the left front frame 1C more stable, makes the flipping and folding of the left front frame 1C more balanced and stable, and increases the firmness of the frame in use; the upper left articulated connection device 1B1 and the lower left articulated connection device 1B2 have the same structure and correspond vertically from top to bottom.

[0042] The preferred technical solution is further: the right frame articulated connection device 2B includes a right upper articulated connection device 2B1 and a right lower articulated connection device 2B2;

[0043] The upper right hinged connection device 2B1 includes an upper right rear joint 2B11, an upper right axle pin 2B12, and an upper right front joint 2B13. The upper right rear joint 2B11 and the upper right front joint 2B13 are connected together by the upper right axle pin 2B12, so that the upper right rear joint 2B11 and the upper right front joint 2B13 are movably connected; the front upper part of the right rear frame 2A is fixedly connected to the upper right rear joint 2B11 by screws, welding or plugging, and the upper right front joint 2B13 is fixedly connected to the upper right rear part of the right front frame 2C by screws, welding or plugging; the above is the specific structure of the upper right hinged connection device 2B1, which is simple in structure, strong in practicality, easy to assemble, and easy to movably flip;

[0044] The lower right hinged connection device 2B2 includes a lower right rear joint 2B21, a lower right axle pin 2B22, and a lower right front joint 2B23. The lower right rear joint 2B21 and the lower right front joint 2B23 are connected together by the lower right axle pin 2B22, so that the lower right rear joint 2B21 and the lower right front joint 2B23 are movably connected; the front lower part of the right rear frame 2A is fixedly connected to the lower right rear joint 2B21 by screws, welding or plugging, and the lower right front joint 2B23 is fixedly connected to the rear lower part of the right front frame 2C by screws, welding or plugging; the above is the specific structure of the lower right hinged connection device 2B2, which is simple in structure, strong in practicality, easy to assemble, and easy to flip;

[0045] The right front frame 2C is turned over and folded toward the outside or inside of the right rear frame 2A based on the right upper axle pin 2B12 and the right lower axle pin 2B22.

[0046] The above-mentioned right frame articulated connecting device 2B makes the connection between the right rear frame 2A and the right front frame 2C more stable, makes the flipping and folding of the left front frame 1C more balanced and stable, and increases the firmness of the frame during use; the upper right articulated connecting device 2B1 and the lower right articulated connecting device 2B2 have the same structure and correspond vertically from top to bottom.

[0047] The preferred technical solution is further: Figure 14 to Figure 23 As shown: the upper left rear joint 1B11 and the upper left front joint 1B13 are connected with an upper left joint locking and unlocking device E, and / or the lower left rear joint 1B21 and the lower left front joint 1B23 are connected with a lower left joint locking and unlocking device F, that is: the upper left joint locking and unlocking device E or the lower left joint locking and unlocking device F can be provided, or two can be provided, preferably two, the locking effect is better; after the left front frame is unfolded, the joint locking and unlocking device is locked so that it cannot be turned over and folded; after all the joint locking and unlocking devices are unlocked, the left front frame can be turned over and folded;

[0048] The upper left joint locking and unlocking device E comprises an upper left joint fixing piece E1, an upper left joint axis nail E2, an upper left joint locking hook E3, and an upper left joint buckle hook E4; the upper left joint fixing piece E1 and the upper left joint locking hook E3 are connected to the upper left joint axis nail E2, so that the upper left joint fixing piece E1 and the upper left joint locking hook E3 are movably connected, and the purpose of the movably connected piece is to enable the upper left joint locking hook E3 to be turned over, locked, and unlocked; the upper left joint fixing piece E1 is integrally fixedly connected to the upper left front joint 1B13, and the upper left joint buckle hook E4 is integrally fixedly connected to the upper left front joint 1B13. When locking, the upper left joint lock hook E3 is flipped and fixedly hooked on the upper left joint buckle hook E4 by manual operation; when unlocking, the upper left joint lock hook E3 is unlocked and disengaged from the upper left joint buckle hook E4 by manual operation; the above is the specific structure of the upper left joint locking and unlocking device E, which is simple in structure, strong in practicality, easy to assemble, easy to lock and unlock, and convenient for users to lock and unlock.

[0049] The lower left joint locking and unlocking device F comprises a lower left joint fixing piece F1, a lower left joint axis nail F2, a lower left joint locking hook F3, and a lower left joint buckle hook F4; the lower left joint fixing piece F1 and the lower left joint locking hook F3 are connected to the lower left joint axis nail F2, so that the lower left joint fixing piece F1 and the lower left joint locking hook F3 are movably connected, and the purpose of the movably connected piece is to enable the lower left joint locking hook F3 to be turned over, locked, and unlocked; the lower left joint fixing piece F1 is integrally fixedly connected to the lower left front joint 1B23, and the lower left joint buckle hook F4 is integrally fixedly connected to the lower left front joint 1B23. When locking, the left lower joint lock hook F3 is flipped and fixedly hooked on the left lower joint buckle hook F4 by manual operation; when unlocking, the left lower joint lock hook F3 is unlocked and disengaged from the left lower joint buckle hook F4 by manual operation; the above is the specific structure of the left lower joint locking and unlocking device F, which is simple in structure, strong in practicality, easy to assemble, easy to lock and unlock, and convenient for users to lock and unlock.

[0050] The upper right rear joint 2B11 and the upper right front joint 2B13 are connected with an upper right joint locking and unlocking device G, and / or the lower right rear joint 2B21 and the lower right front joint 2B23 are connected with a lower right joint locking and unlocking device H, that is: an upper right joint locking and unlocking device G or a lower right joint locking and unlocking device H can be set, or two can be set, preferably two, and the locking effect is better; after the right front frame is unfolded, the joint locking and unlocking device is locked so that it cannot be flipped and folded; after all the joint locking and unlocking devices are unlocked, the right front frame can be flipped and folded.

[0051] The upper right joint locking and unlocking device G comprises an upper right joint fixing member G1, an upper right joint axis pin G2, an upper right joint locking hook G3 and an upper right joint buckle hook G4; the upper right joint fixing member G1 and the upper right joint locking hook G3 are connected to the upper right joint axis pin G2, so that the upper right joint fixing member G1 and the upper right joint locking hook G3 are movably connected, and the purpose of the movably connected member is to enable the upper right joint locking hook G3 to be turned over, locked and unlocked; the upper right joint fixing member G1 is integrally fixedly connected to the upper right front joint 2B13, and the upper right joint buckle hook G4 is integrally fixedly connected to the upper right front joint 2B13. When locking, the upper right joint lock hook G3 is flipped and fixedly hooked on the upper right joint buckle G4 by manual operation; when unlocking, the upper right joint lock hook G3 is unlocked and disengaged from the upper right joint buckle G4 by manual operation; the above is the specific structure of the upper right joint locking and unlocking device G, which is simple in structure, strong in practicality, easy to assemble, easy to lock and unlock, and convenient for users to lock and unlock.

[0052] The lower right joint locking and unlocking device H comprises a lower right joint fixing member H1, a lower right joint axis pin H2, a lower right joint locking hook H3, and a lower right joint buckle hook H4; the lower right joint fixing member H1 and the lower right joint locking hook H3 are connected to the lower right joint axis pin H2, so that the lower right joint fixing member H1 and the lower right joint locking hook H3 are movably connected, and the purpose of the movably connected member is to enable the lower right joint locking hook H3 to be turned over, locked, and unlocked; the lower right joint fixing member H1 is integrally fixedly connected to the lower right front joint 2B23, and the lower right joint buckle hook H4 is integrally fixedly connected to the lower right front joint 2B23. When locking, the right lower joint lock hook H3 is flipped and fixedly hooked on the right lower joint buckle H4 by manual operation; when unlocking, the right lower joint lock hook H3 is unlocked and disengaged from the right lower joint buckle H4 by manual operation; the above is the specific structure of the right lower joint locking and unlocking device H, which is simple in structure, strong in practicality, easy to assemble, easy to lock and unlock, and convenient for users to lock and unlock.

[0053] The preferred technical solution is further: Figure 1 to Figure 23As shown: a wheelchair frame hinged folding device, also includes an X-shaped seat hinge frame 3; the X-shaped seat hinge frame 3 includes a left oblique rod connecting pipe 31, a left tilting rod 32, a central hinge shaft 33, a right oblique rod connecting pipe 34, and a right tilting rod 35; the left oblique rod connecting pipe 31, the left tilting rod 32, the right oblique rod connecting pipe 34, and the right tilting rod 35 are made of aluminum tubes and are relatively light; the left oblique rod connecting pipe 31 is welded and fixedly connected to the bottom end of the right tilting rod 35; the left oblique rod The connecting pipe 31 and the right inclined rod connecting pipe 34 are arranged in parallel; the right inclined rod connecting pipe 34 is welded and fixedly connected to the bottom end of the left inclined rod 32; the middle parts of the left inclined rod 32 and the right inclined rod 35 are commonly crossed and connected with a central hinge shaft 33 to prevent them from falling off, so that the left inclined rod 32 and the right inclined rod 35 are movably connected with the central hinge shaft 33, and the left inclined rod 32 and the right inclined rod 35 are movably hinged based on the central hinge shaft 33, thereby forming an X-shaped seat hinge frame 3;

[0054] The inner lower wall of the left rear frame 1A is welded and fixedly connected with two left connecting ears 4, a left diagonal rod connecting tube 31 is arranged between the left connecting ears 4, a left lower bolt 41 is passed through the two left connecting ears 4 and the left diagonal rod connecting tube 31, and the left lower bolt 41 passes through the tube hole of the left diagonal rod connecting tube 31, so that the left diagonal rod connecting tube 31 is movably connected to the left rear frame 1A;

[0055] Two right connecting ears 5 are welded and fixedly connected to the inner lower wall of the right rear frame 2A, a right diagonal rod connecting tube 34 is arranged between the right connecting ears 5, and a right lower bolt 51 is penetrated through the two right connecting ears 5 and the right diagonal rod connecting tube 34. The right lower bolt 51 passes through the tube hole of the right diagonal rod connecting tube 34, so that a movable connection is formed between the right diagonal rod connecting tube 34 and the right rear frame 2A.

[0056] The X-shaped seat articulated frame 3 is movably connected to the left rear frame 1A and the right rear frame 2A. When the X-shaped seat articulated frame 3 is articulated and folded, the X-shaped seat articulated frame 3 pulls the left rear frame 1A and the right rear frame 2A, and the left rear frame 1A and the right rear frame 2A are synchronously brought together, thereby reducing the lateral width of the wheelchair frame, compressing the lateral width of the wheelchair frame, and compressing the lateral packaging space and volume of the wheelchair frame, making it convenient for the left rear frame 1A and the right rear frame 2A to be folded together. When the left rear frame 1A and the right rear frame 2A are brought together, the left front frame 1C and the right front frame 2C are synchronously driven to come together. After the left front frame 1C and the right front frame 2C are also folded, the length of the wheelchair frame is compressed, and the length packaging space and volume of the wheelchair frame are compressed.

[0057] When in use, the X-shaped seat articulated frame 3 is unfolded, the X-shaped seat articulated frame 3 opens the left rear frame 1A and the right rear frame 2A, and the left rear frame 1A and the right rear frame 2A move away from each other synchronously, thereby increasing the lateral width of the wheelchair frame.

[0058] The preferred technical solution is further: a wheelchair frame articulated folding device, also includes a left rear seat rod 6A, a left hinged seat connecting device 6B, a left front seat rod 6C, a right rear seat rod 7A, a right hinged seat connecting device 7B, and a right front seat rod 7C; the left hinged seat connecting device 6B and the right hinged seat connecting device 7B are made of metal, such as aluminum; the left rear seat rod 6A, the left front seat rod 6C, the right rear seat rod 7A, and the right front seat rod 7C are made of metal pipes, such as aluminum, which are relatively light and do not rust.

[0059] The total length of the left rear section rod 6A and the left front section rod 6C of the seat is 30 cm to 50 cm, and the left front section rod 6C of the seat accounts for 25% to 40% of the total length. The left rear section rod 6A and the left front section rod 6C of the seat are respectively set to a suitable length; the diameter of the left rear section rod 6A and the left front section rod 6C of the seat is 1.5 cm to 4 cm;

[0060] The total length of the seat right rear section rod 7A and the seat right front section rod 7C is 30 cm to 50 cm, and the seat right front section rod 7C accounts for 25% to 40% of the total length. The seat right rear section rod 7A and the seat right front section rod 7C are respectively set to a suitable length; the diameter of the seat right rear section rod 7A and the seat right front section rod 7C is 1.5 cm to 4 cm;

[0061] The top end of the left tilting rod 32 is welded and fixedly connected with the left rear section rod 6A of the seat, and the left rear section rod 6A of the seat and the left rear frame 1A are coaxially arranged; the front end of the left rear section rod 6A of the seat and the rear end of the left front section rod 6C of the seat are connected with the left hinge connecting device 6B of the seat, and the left front section rod 6C of the seat can be turned over and folded toward the left rear section rod 6A of the seat through the left hinge connecting device 6B of the seat; that is, the left rear section rod 6A of the seat and the left front section rod 6C of the seat are turned over and hinged and folded through the left hinge connecting device 6B of the seat;

[0062] The top end of the right-tilting rod 35 is fixedly connected with a seat right rear section rod 7A, and the seat right rear section rod 7A and the right rear frame 2A are coaxially arranged; a seat right hinge connecting device 7B is connected between the front end of the seat right rear section rod 7A and the rear end of the seat right front section rod 7C, and the seat right front section rod 7C can be turned over and folded toward the seat right rear section rod 7A through the seat right hinge connecting device 7B, that is, the seat right rear section rod 7A and the right rear frame 2A are turned over and hingedly folded through the seat right hinge connecting device 7B;

[0063] The left front section of the seat rod 6C is flipped and folded through the left hinge connection device 6B of the seat to shorten the length of the left rod body of the seat; the right rear frame 2A is flipped and folded through the right hinge connection device 7B of the seat to shorten the length of the right rod body of the seat; after the rod bodies on both sides are folded, the lengths of the left and right seat rods are shortened, and the packaging volume is compressed.

[0064] The left rear section rod 6A and the right rear section rod 7A of the seat are arranged in parallel so that the widths therebetween are consistent; the left front section rod 6C and the right front section rod 7C of the seat are arranged in parallel so that the widths therebetween are consistent; the left rear section rod 6A and the left front section rod 6C of the seat are arranged coaxially, and after the left front section rod 6C of the seat is unfolded, a long rod is formed; the right rear section rod 7A and the right front section rod 7C of the seat are arranged coaxially, and after the right front section rod 7C of the seat is unfolded, a long rod is formed;

[0065] A soft seat cushion 8 is clamped or fixedly connected between the left rear section rod 6A, the left front section rod 6C and the right rear section rod 7A, the right front section rod 7C of the seat; the soft seat cushion 8 is square in shape and made of woven cloth or leather;

[0066] The left rear section rod 6A, the left front section rod 6C, the right rear section rod 7A, and the right front section rod 7C of the seat are hinged and folded together with the X-shaped seat hinge frame 3, and the soft seat cushion 8 is folded accordingly to compress the space;

[0067] The left rear section rod 6A, the left front section rod 6C, the right rear section rod 7A, and the right front section rod 7C of the seat are spread apart with the X-shaped seat articulated frame 3, and the soft seat cushion 8 is spread out accordingly, so that the seat surface is flat for use;

[0068] When the left front section rod 6C of the seat is flipped and folded toward the left rear section rod 6A of the seat and the right front section rod 7C of the seat is flipped and folded toward the right rear section rod 7A of the seat, the soft seat cushion 8 is flipped and folded accordingly, further reducing the length of the soft seat cushion 8 and compressing the length of the soft seat cushion 8.

[0069] The preferred technical solution is further: Figure 6 to Figure 8 As shown: the seat left hinge connection device 6B comprises a left first joint 6B1, a left rod axle pin 6B2, and a left second joint 6B3. The left first joint 6B1 and the left second joint 6B3 are connected to the left rod axle pin 6B2, so that the left first joint 6B1 and the left second joint 6B3 are movably connected together;

[0070] The front end of the left rear section rod 6A of the seat is fixedly connected to the left first joint 6B1 by screws, and the rear end of the left front section rod 6C of the seat is fixedly connected to the left second joint 6B3 by screws. The left front section rod 6C of the seat is flipped and folded toward the left rear section rod 6A of the seat based on the left rod axis pin 6B2; this is to further refine the specific structure of the left hinge connection device 6B of the seat; the structure is convenient to hinge, stable and firm to hinge, easy to set and easy to assemble;

[0071] The seat right hinge connection device 7B comprises a right first joint 7B1, a right rod axle pin 7B2, and a right second joint 7B3. The right first joint 7B1 and the right second joint 7B3 are connected to the right rod axle pin 7B2, so that the right first joint 7B1 and the right second joint 7B3 are movably connected together.

[0072] The front end of the right rear section rod 7A of the seat is fixedly connected to the right first joint 7B1 by screws, the rear end of the right front section rod 7C of the seat is fixedly connected to the right second joint 7B3 by screws, and the right front section rod 7C of the seat is flipped and folded toward the right rear section rod 7A of the seat based on the right rod axis pin 7B2; this is to further refine the specific structure of the right hinged connection device 7B of the seat; this structure is easy to articulate, stable and firm, easy to set up and easy to assemble.

[0073] The preferred technical solution is further: Figure 1 to Figure 23 As shown: the top of the left rear frame 1A is fixedly connected to the left bearing positioning member 1 81 and the left bearing positioning member 2 82 by screws, and the top of the left front frame 1C is fixedly connected to the left bearing positioning member 3 83 by screws;

[0074] The top of the right rear frame 2A is fixedly connected to a right bearing locator 1 91 and a right bearing locator 2 92 by screws, and the top of the right front frame 2C is fixedly connected to a right bearing locator 3 93 by screws;

[0075] After the X-shaped seat articulated frame 3 is unfolded into place, the left rear section rod 6A of the seat falls on the top of the left supporting positioning piece 1 81 and the left supporting positioning piece 2 82 to be supported and fixed, and the left front section rod 6C of the seat falls on the top of the left supporting positioning piece 3 83 to be supported and fixed; the right rear section rod 7A of the seat falls on the top of the right supporting positioning piece 1 91 and the right supporting positioning piece 2 92 to be supported and fixed, and the right front section rod 7C of the seat falls on the top of the right supporting positioning piece 3 93 to be supported and fixed; the overall heights of the left rear section rod 6A, the left front section rod 6C, the right rear section rod 7A and the right front section rod 7C of the seat are made the same, so that the soft seat cushion 8 is flat after being unfolded.

[0076] The tops of the left bearing positioning member 1 81, the left supporting positioning member 2 82, and the left supporting positioning member 3 83 are provided with corresponding left grooves 1 811, 2 812, and 3 813, and the three grooves are coaxially arranged with the left rear section rod 6A of the seat and the left front section rod 6C of the seat. The left rear section rod 6A of the seat falls into the left grooves 1 811 and 2 812 on the tops of the left bearing positioning member 1 81 and the left supporting positioning member 2 82 to be supported and fixed, and is not easy to deviate. At the same time, the unfolded width of the X-shaped seat articulated frame 3 is also fixed, and the X-shaped seat articulated frame 3 is not easy to be automatically compressed and folded; the left front section rod 6C of the seat falls into the left grooves 3 813 on the tops of the left supporting positioning member 3 83 to be supported and fixed, and is not easy to deviate;

[0077] The tops of the right supporting positioning member 91, the right supporting positioning member 92 and the right supporting positioning member 3 93 are provided with corresponding right grooves 1 911, 2 912 and 3 913, and the three grooves are coaxially arranged with the right rear section rod 7A of the seat and the right front section rod 7C of the seat. The right rear section rod 7A of the seat falls into the right grooves 1 911 and 2 912 on the tops of the right supporting positioning member 91 and the right supporting positioning member 2 92, and is supported and fixed, and is not easily displaced. At the same time, the unfolded width of the X-shaped seat articulated frame 3 is also fixed, and the X-shaped seat articulated frame 3 is not easily compressed and folded automatically; the right front section rod 7C of the seat falls into the right grooves 3 913 on the tops of the right supporting positioning member 3 93, and is supported and fixed, and is not easily displaced.

[0078] The rear top of the left rear frame 1A is connected to a left rear backrest rod that can be flipped and folded backwards; the rear top of the right rear frame 2A is connected to a right rear backrest rod that can be flipped and folded backwards, and a soft backrest pad is connected between the left rear backrest rod and the right rear backrest rod. The rear top of the left rear frame 1A is connected to a foldable left handrail in front; the rear top of the right rear frame 2A is connected to a foldable right handrail in front.

Claims

1. A wheelchair frame articulated folding device, comprising a left rear frame, a left frame articulated connecting device, a left front frame, a right rear frame, a right frame articulated connecting device, and a right front frame, characterized in that: The front part of the left rear frame is connected to the left frame hinge connection device, and the left frame hinge connection device is connected to the rear part of the left front frame. The left front frame can be turned over and folded to the outside or inside of the left rear frame through the left frame hinge connection device; The front part of the right rear frame is connected to the right frame hinge connection device, and the right frame hinge connection device is connected to the rear part of the right front frame. The right front frame can be turned and folded toward the outside or inside of the right rear frame through the right frame hinge connection device.

2. The wheelchair frame hinged folding device according to claim 1, characterized in that: A left locking and unlocking device is connected between the front part of the left rear frame and the rear part of the left front frame; after the left front frame is unfolded, it is locked by the left locking and unlocking device so that it cannot be turned over and folded; after the left locking and unlocking device is unlocked, the left front frame can be turned over and folded; A right locking and unlocking device is connected between the front portion of the right rear frame and the rear portion of the right front frame; After the right front frame is unfolded, it is locked by the right locking and unlocking device so that it cannot be turned over and folded; The right front frame can be flipped and folded only after the right locking and unlocking device is unlocked.

3. The wheelchair frame hinged folding device according to claim 2, characterized in that: The left locking and unlocking device comprises a left fixed connecting member, a left connecting shaft, a left upper lock hook member, and a left fixed lock hook; the left fixed connecting member and the left upper lock hook member are connected with a left connecting shaft so that the left upper lock hook member is movably connected to the left fixed connecting member; the front part of the left rear frame is fixedly connected to the left fixed lock hook; the rear part of the left front frame is fixedly connected to the left fixed connecting member; when locking, the left upper lock hook member is fixedly hooked to the left fixed lock hook; when unlocking, the left upper lock hook member is disengaged from the left fixed lock hook; The right locking and unlocking device comprises a right fixed connecting member, a right connecting shaft, a right upper locking hook member, and a right fixed locking hook; the right fixed connecting member and the right upper locking hook member are jointly connected with the right connecting member and the right upper locking hook member, so that the right upper locking hook member is movably connected to the right fixed connecting member; the front part of the right rear frame is fixedly connected to the right fixed locking hook; the rear part of the right front frame is fixedly connected to the right fixed connecting member; when locking, the right upper locking hook member is fixedly hooked to the right fixed locking hook; when unlocking, the right upper locking hook member is disengaged from the right fixed locking hook.

4. The wheelchair frame hinged folding device according to claim 1, characterized in that: The left frame hinge connection device includes an upper left hinge connection device and a lower left hinge connection device; The upper left hinge connection device includes an upper left rear joint, an upper left axle pin, and an upper left front joint. The upper left rear joint and the upper left front joint are both connected with the upper left axle pin, so that the upper left rear joint and the upper left front joint are movably connected; the front upper part of the left rear frame is fixedly connected to the upper left rear joint, and the upper left front joint is fixedly connected to the rear upper part of the left front frame; The lower left hinged connection device includes a lower left rear joint, a lower left axle nail, and a lower left front joint. The lower left rear joint and the lower left front joint are both connected with the lower left axle nail, so that the lower left rear joint and the lower left front joint are movably connected; the front lower part of the left rear frame is fixedly connected to the lower left rear joint, and the lower left front joint is fixedly connected to the rear lower part of the left front frame; The left front frame is turned over and folded toward the outside or inside of the left rear frame based on the left upper axle pin and the left lower axle pin; The right frame hinge connection device includes a right upper hinge connection device and a right lower hinge connection device; The upper right hinged connection device comprises an upper right rear joint, an upper right axle pin, and an upper right front joint. The upper right rear joint and the upper right front joint are both connected with the upper right axle pin, so that the upper right rear joint and the upper right front joint are movably connected. The upper front part of the right rear frame is fixedly connected to the upper right rear joint, and the upper right front joint is fixedly connected to the upper rear part of the right front frame. The lower right hinged connection device comprises a lower right rear joint, a lower right axle pin, and a lower right front joint. The lower right rear joint and the lower right front joint are both connected with a lower right axle pin, so that the lower right rear joint and the lower right front joint are movably connected. The lower front part of the right rear frame is fixedly connected to the lower right rear joint, and the lower right front joint is fixedly connected to the lower rear part of the right front frame. The right front frame is turned over and folded toward the outside or inside of the right rear frame based on the right upper axle pin and the right lower axle pin.

5. The wheelchair frame hinged folding device according to claim 4, characterized in that: The upper left rear joint and the upper left front joint are connected with an upper left joint locking and unlocking device, and / or the lower left rear joint and the lower left front joint are connected with a lower left joint locking and unlocking device; after the left front frame is unfolded, the joint locking and unlocking device is locked so as not to be turned over and folded; after all the joint locking and unlocking devices are unlocked, the left front frame can be turned over and folded; The upper right rear joint and the upper right front joint are connected with an upper right joint locking and unlocking device, and / or the lower right rear joint and the lower right front joint are connected with a lower right joint locking and unlocking device; After the right front frame is unfolded, the joint locking and unlocking device is locked so that it cannot be turned over and folded; after all the joint locking and unlocking devices are unlocked, the right front frame can be turned over and folded.

6. The wheelchair frame hinged folding device according to claim 5, characterized in that: The upper left joint locking and unlocking device comprises an upper left joint fixing piece, an upper left joint axis nail, an upper left joint locking hook, and an upper left joint buckle hook; the upper left joint fixing piece and the upper left joint locking hook are connected to the upper left joint axis nail together, so that the upper left joint fixing piece and the upper left joint locking hook are movably connected, the upper left joint fixing piece is fixedly connected to the upper left front joint, and the upper left joint buckle hook is fixedly connected to the upper left rear joint; when locking, the upper left joint locking hook is fixedly hooked to the upper left joint buckle hook; when unlocking, the upper left joint locking hook is unlocked and disengaged from the upper left joint buckle hook; The left lower joint locking and unlocking device comprises a left lower joint fixing piece, a left lower joint axis nail, a left lower joint locking hook, and a left lower joint buckle hook; the left lower joint fixing piece and the left lower joint locking hook are connected to the left lower joint axis nail together, so that the left lower joint fixing piece and the left lower joint locking hook are movably connected, the left lower joint fixing piece is fixedly connected to the left lower front joint, and the left lower joint buckle hook is fixedly connected to the left lower rear joint; when locking, the left lower joint locking hook is fixedly hooked to the left lower joint buckle hook; when unlocking, the left lower joint locking hook is unlocked and disengaged from the left lower joint buckle hook; The upper right joint locking and unlocking device comprises an upper right joint fixing piece, an upper right joint axis nail, an upper right joint locking hook, and an upper right joint buckle hook; the upper right joint fixing piece and the upper right joint locking hook are connected to the upper right joint axis nail together, so that the upper right joint fixing piece and the upper right joint locking hook are movably connected, the upper right joint fixing piece is fixedly connected to the upper right front joint, and the upper right joint buckle hook is fixedly connected to the upper right rear joint; when locking, the upper right joint locking hook is fixedly hooked to the upper right joint buckle hook; when unlocking, the upper right joint locking hook is unlocked and disengaged from the upper right joint buckle hook; The locking and unlocking device of the lower right joint comprises a lower right joint fixing piece, a lower right joint axis nail, a lower right joint locking hook and a lower right joint buckle hook; the lower right joint fixing piece and the lower right joint locking hook are connected with the lower right joint axis nail together, so that the lower right joint fixing piece and the lower right joint locking hook are movably connected, the lower right joint fixing piece is fixedly connected to the lower right front joint, and the lower right joint buckle hook is fixedly connected to the lower right rear joint; when locking, the lower right joint locking hook is fixedly hooked to the lower right joint buckle hook; when unlocking, the lower right joint locking hook is unlocked and disengaged from the lower right joint buckle hook.

7. A wheelchair frame hinged folding device according to any one of claims 1 to 6, characterized in that: It also includes an X-shaped seat articulated frame; the X-shaped seat articulated frame includes a left oblique rod connecting pipe, a left tilting rod, a central hinge shaft, a right oblique rod connecting pipe, and a right tilting rod; the left oblique rod connecting pipe is fixedly connected to the bottom end of the right tilting rod; the right oblique rod connecting pipe is fixedly connected to the bottom end of the left tilting rod; the middle parts of the left tilting rod and the right tilting rod are jointly crossed by the central hinge shaft, thereby forming an X-shaped seat articulated frame; The inner lower wall of the left rear frame is fixedly connected to two left connecting ears, a left diagonal rod connecting tube is arranged between the left connecting ears, and a left lower bolt is passed through the two left connecting ears and the left diagonal rod connecting tube, so that a movable connection is formed between the left diagonal rod connecting tube and the left rear frame; The inner lower wall of the right rear frame is fixedly connected to two right connecting ears, a right diagonal rod connecting tube is arranged between the right connecting ears, and a right lower bolt is passed through the two right connecting ears and the right diagonal rod connecting tube, so that a movable connection is formed between the right diagonal rod connecting tube and the right rear frame; It also includes a left rear section of the seat, a left hinged connection device of the seat, a left front section of the seat, a right rear section of the seat, a right hinged connection device of the seat, and a right front section of the seat; The top end of the left-tilting rod is fixedly connected to a left rear section rod of the seat, and the left rear section rod of the seat and the left rear frame are coaxially arranged; a left hinged connection device of the seat is connected between the front end of the left rear section rod of the seat and the rear end of the left front section rod of the seat, and the left front section rod of the seat can be flipped and folded toward the left rear section rod of the seat through the left hinged connection device of the seat; The top end of the right-tilted rod is fixedly connected with a right rear section rod of the seat, and the right rear section rod of the seat and the right rear frame are coaxially arranged; a right hinged connection device of the seat is connected between the front end of the right rear section rod of the seat and the rear end of the right front section rod of the seat, and the right front section rod of the seat can be flipped and folded toward the right rear section rod of the seat through the right hinged connection device of the seat.

8. The wheelchair frame hinged folding device according to claim 7, characterized in that: The left rear section rod and the right rear section rod of the seat are arranged in parallel, and the left front section rod and the right front section rod of the seat are arranged in parallel; The left rear section rod and the left front section rod of the seat are coaxially arranged; the right rear section rod and the right front section rod of the seat are coaxially arranged; A soft seat cushion is fixedly connected between the left rear section rod, the left front section rod, the right rear section rod, and the right front section rod of the seat; The left rear section rod, the left front section rod, the right rear section rod and the right front section rod of the seat are brought together with the X-shaped seat articulated frame being hinged and folded, and the soft seat cushion is folded accordingly; The left rear section rod, the left front section rod, the right rear section rod and the right front section rod of the seat are moved away from each other as the X-shaped seat articulated frame is unfolded, and the soft seat cushion is unfolded accordingly; When the left front section rod of the seat is turned over and folded toward the left rear section rod of the seat and the right front section rod of the seat is turned over and folded toward the right rear section rod of the seat, the soft seat cushion is turned over and folded accordingly.

9. The wheelchair frame hinged folding device according to claim 7, characterized in that: The left hinged connection device of the seat comprises a left first joint, a left rod axle pin, and a left second joint. The left first joint and the left second joint are connected to the left rod axle pin together, so that the left first joint and the left second joint are movably connected together. The front end of the left rear section rod of the seat is fixedly connected to the left first joint, the rear end of the left front section rod of the seat is fixedly connected to the left second joint, and the left front section rod of the seat is flipped and folded toward the left rear section rod of the seat based on the left rod axle pin; The seat right hinge connection device comprises a right first joint, a right rod axle pin, and a right second joint. The right first joint and the right second joint are connected to the right rod axle pin, so that the right first joint and the right second joint are movably connected together. The front end of the right rear section rod of the seat is fixedly connected to the right first joint, the rear end of the right front section rod of the seat is fixedly connected to the right second joint, and the right front section rod of the seat is flipped and folded toward the right rear section rod of the seat based on the right rod axle pin.

10. The wheelchair frame hinged folding device according to claim 7, characterized in that: A left bearing positioning member 1 and a left bearing positioning member 2 are fixed to the top of the left rear frame, and a left bearing positioning member 3 is fixed to the top of the left front frame; A right bearing positioning member 1 and a right bearing positioning member 2 are fixed to the top of the right rear frame, and a right bearing positioning member 3 is fixed to the top of the right front frame; After the X-shaped seat articulated frame is unfolded into place, the left rear section rod of the seat falls on the top of the left supporting positioning piece 1 and the left supporting positioning piece 2 and is supported and fixed, and the left front section rod of the seat falls on the top of the left supporting positioning piece 3 and is supported and fixed; the right rear section rod of the seat falls on the top of the right supporting positioning piece 1 and the right supporting positioning piece 2 and is supported and fixed, and the right front section rod of the seat falls on the top of the right supporting positioning piece 3 and is supported and fixed.

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