Wheelchair frame

Abstract

The utility model discloses a wheelchair frame which is characterized in that the upper end of a left rear foot rod is arranged upwards, the rear lower end of the left rear foot rod is arranged backwards in the transverse axis direction, the upper end and the rear lower end of the left rear foot rod are arranged in a downward arc-shaped bending transition mode, and a left arc-shaped large-bending space is formed between the upper end and the rear lower end of the left rear foot rod; the upper end of the right rear foot rod is arranged upwards, the rear lower end of the right rear foot rod is arranged backwards in the transverse axis direction, the upper end and the rear lower end of the right rear foot rod are arranged in a downward arc-shaped bending transition mode, and a right arc-shaped large-bending space is formed between the upper end and the rear lower end of the right rear foot rod. The left upper part of the front foot stand is connected with the upper part of the left rear foot rod through a left hinge connecting device; the right upper part of the front foot stool is connected with the upper part of the right rear foot rod through a right hinge connecting device; the structure of the product provides sufficient accommodating space for the folding of the seat and the backrest frame of the wheelchair, and the seat of the wheelchair is close to the left rear leg rod and the right rear leg rod to be folded and compressed to be close to the left rear leg rod and the right rear leg rod.

Description

Technical Field

[0001] The utility model relates to wheelchair components, specifically a wheelchair frame. Background Technique

[0002] For example 1: The Chinese patent document publication number: CN210250325U discloses a folding wheelchair. The bottom end of the backrest frame is movably connected to the rear end of the seat; the upper ends of the left front foot rod and the right front foot rod are movably connected to the left and right front ends of the corresponding reverse side of the seat; the left rear foot rod and the right rear foot rod are inclined from the rear to the front; the upper ends of the left rear foot rod and the right rear foot rod are movably connected to the left and right front ends of the corresponding reverse side of the seat; the left front hinge piece and the right front hinge piece are respectively movably connected to the left side and the right side of the bottom end of the backrest frame, and the other ends of the left hinge piece and the right hinge piece are movably connected to the lower segments of the corresponding left front foot rod and right front foot rod; the left rear hinge piece and the right rear hinge piece are respectively movably connected to the left side and the right side of the bottom end of the backrest frame, and the left rear hinge piece and the right rear hinge piece are movably connected to the lower ends of the corresponding left rear foot rod and right rear foot rod, for three-section integrated folding.

[0003] The above products are similar products with the same type of structure. The left rear foot rod and the right rear foot rod are straight rod bodies, and the left rear foot rod and the right rear foot rod are inclined from the rear to the front. When the seat is hinged and folded relative to the left rear foot rod and the right rear foot rod, the folding space of the seat is not sufficient enough, and the folding between the two is not tight enough, and the folding between the backrest frame and the seat is not tight enough either.

[0004] For example 2: The Chinese patent document publication number: CN217014487U discloses a folding wheelchair, including a front foot frame, a rear foot frame, a seat, a backrest, and a braking device. The rear foot frame includes a left inclined foot rod, a cross beam, and a right inclined foot rod. A cross beam is fixedly connected between the middle sections of the left inclined foot rod and the right inclined foot rod; front wheels are installed at the bottoms of the front foot frames, rear wheels are installed at the bottoms of the left inclined foot rod and the right inclined foot rod, and a braking device is installed at the bottom section of the rear foot frame; the tops of the front foot frame, the left inclined foot rod, and the right inclined foot rod are hinged to the reverse side of the seat; the middle section of the backrest is hinged to the rear part of the seat; the left and right bottom ends of the backrest are respectively hinged with corresponding left fork-shaped hinge devices and right fork-shaped hinge devices. The bottom parts of the left fork-shaped hinge device and the right fork-shaped hinge device are provided with corresponding left fork openings and right fork openings. The bottom parts of the left fork-shaped hinge device and the right fork-shaped hinge device are movably hinged to the rear bottom sections of the corresponding left inclined foot rod and right inclined foot rod, and the left inclined foot rod and the right inclined foot rod are embedded in the corresponding left fork openings and right fork openings.

[0005] The above products are similar products with the same type of structure. Their left and right inclined footrests are straight and both incline from the rear to the front. When the seat is hinged and folded relative to the left and right inclined footrests, the folding space of the seat is not sufficient enough, and the folding between the seat and the left and right inclined footrests is not tight enough. Summary of the Invention

[0006] In order to solve the above technical problems, the present utility model provides a wheelchair frame with reasonable structural settings, strong practicability and convenient use.

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

[0008] A wheelchair frame includes a front footrest, a left hinge connecting device, a right hinge connecting device, a left rear footrest and a right rear footrest. The left rear footrest and the right rear footrest are symmetrical left and right.

[0009] The left rear footrest is integrally formed; the upper end of the left rear footrest is set upward, and the lower rear end is set horizontally backward. There is a downward arc-shaped bending transition between the upper end and the lower rear end of the left rear footrest, and a large left-side arc-shaped bending space is formed between the upper end and the lower rear end of the left rear footrest.

[0010] The right rear footrest is integrally formed; the upper end of the right rear footrest is set upward, and the lower rear end is set horizontally backward. There is a downward arc-shaped bending transition between the upper end and the lower rear end of the right rear footrest, and a large right-side arc-shaped bending space is formed between the upper end and the lower rear end of the right rear footrest.

[0011] The upper left part of the front footrest is connected to the upper part of the left rear footrest through the left hinge connecting device;

[0012] The upper right part of the front footrest is connected to the upper part of the right rear footrest through the right hinge connecting device;

[0013] The front footrest can be turned over and folded back and forth relative to the left and right rear footrests through the left and right hinge connecting devices.

[0014] The beneficial effects of a wheelchair frame of the present utility model are as follows: The product forms a large left-arc bending space through the left rear foot rod that is bent downward in an arc; the product forms a large right-arc bending space through the right rear foot rod that is bent downward in an arc; the large left-arc bending space and the large right-arc bending space of the product structure provide an open space at the upper left and right rear of the wheelchair frame, providing sufficient accommodation space for the folding of the seat and backrest of the wheelchair. After the seat of the wheelchair folds towards the left and right rear foot rods, it is closer and more tightly compressed. The space distance between the folded and compressed seat and the left and right rear foot rods is smaller, and the volume becomes smaller after compression; at the same time, it also provides sufficient installation space for the rear wheelchair braking devices on both sides without affecting the flipping, folding, and compression of the seat; the above structure is simple and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of the product of the present utility model;

[0016] Figure 2 is an exploded view of the product of the present utility model;

[0017] Figure 3 is Figure 1 the left view of the product;

[0018] Figure 4 is Figure 1 the right view of the product;

[0019] Figure 5 is a perspective view of the front foot frame, left rear foot rod, and right rear foot rod of the product of the present utility model being flat tubes;

[0020] Figure 6 is Figure 5 the left view of the product;

[0021] Figure 7 is Figure 5 the right view of the product;

[0022] Figure 8 is a perspective view of the front foot frame, left rear foot rod, and right rear foot rod of the product of the present utility model being round tubes;

[0023] Figure 9 , Figure 10 is a perspective view of the product of the present utility model;

[0024] Figure 11 , Figure 12 is an exploded view of the product of the present utility model;

[0025] Figure 13 is Figure 9 the right view of the product;

[0026] Figure 14Yes Figure 9 Left view of the product

[0027] Front footrest 1, left forward-tilting rod 11, front cross beam rod 12, right forward-tilting rod 13, left hinge connection device 2, left first transverse through hole 21, left screw assembly 22, left second transverse through hole 23, left inner connection head 201, left outer connection head 202, left central shaft nail 203, right hinge connection device 5, right first transverse through hole 51, right screw assembly 52, right second transverse through hole 53, right inner connection head 501, right outer connection head 502, right central shaft nail 503, left rear foot rod 4, left arc-shaped large bending space 41, left brake mounting hole 42, left lock mounting hole 43, left rear caster mounting hole 44, right rear foot rod 6, right arc-shaped large bending space 61, right brake mounting hole 62, right lock mounting hole 63, right rear caster mounting hole 64, rear cross beam rod 7 Detailed implementation mode

[0028] As Figures 1 to 14 shown: A wheelchair frame includes a front footrest 1, a left hinge connection device 2, a right hinge connection device 5, a left rear foot rod 4, and a right rear foot rod 6. The left rear foot rod 4 and the right rear foot rod 6 are symmetric left and right; the front footrest 1 is made of aluminum or iron metal with a sprayed or electroplated coating, which is rust-proof and beautiful; the left rear foot rod 4 and the right rear foot rod 6 are made of aluminum or iron metal with a sprayed or electroplated coating, which is rust-proof and beautiful; the left rear foot rod 4 and the right rear foot rod 6 are made of round tubes or flat tubes; the front footrest 1 is made of round tubes or flat tubes; the main technical improvement of this product lies in:

[0029] The left rear foot rod 4 is integrally bent and formed by a metal processing machine; the upper end of the left rear foot rod 4 is set upward, and the rear lower end is set horizontally backward. There is a downward arc-shaped bending transition between the upper end and the rear lower end of the left rear foot rod 4. A left arc-shaped large bending space 41 is formed between the upper end and the rear lower end of the left rear foot rod 4, and the left arc-shaped large bending space 41 is in the upper left rear; the lower bottom of the left rear foot rod 4 is used for installing a left rear caster;

[0030] The right rear foot rod 6 is integrally bent and formed by a metal processing machine; the upper end of the right rear foot rod 6 is set upward, and the rear lower end is set horizontally backward. There is a downward arc-shaped bending transition between the upper end and the rear lower end of the right rear foot rod 6. A right arc-shaped large bending space 61 is formed between the upper end and the rear lower end of the right rear foot rod 6, and the right arc-shaped large bending space 61 is in the upper right rear; the lower bottom of the right rear foot rod 6 is used for installing a right rear caster;

[0031] The left rear foot rod 4 with a downward arc-shaped bending transition forms a large left arc-shaped space 41 in this product; the right rear foot rod 6 with a downward arc-shaped bending transition forms a large right arc-shaped space 61 in this product; the large left arc-shaped space 41 and the large right arc-shaped space 61 with the above structures provide an open space at the upper left and right rear of this wheelchair frame, providing sufficient accommodation space for the folding of the seat and backrest of the wheelchair. After the seat of the wheelchair is folded towards the left rear foot rod 4 and the right rear foot rod 6, it is closer and more tightly compressed. The space distance between the folded and compressed seat and the left rear foot rod 4 and the right rear foot rod 6 is less, and the volume becomes smaller after compression; at the same time, it also provides sufficient installation space for the rear wheelchair brake devices on both sides, without affecting the flipping, folding and compression of the seat; the above structure is simple and practical.

[0032] The upper left part of the front foot frame 1 and the upper part of the left rear foot rod 4 are connected by a left hinge connecting device 2;

[0033] The upper right part of the front foot frame 1 and the upper part of the right rear foot rod 6 are connected by a right hinge connecting device 5;

[0034] The front foot frame 1 can be folded forward and backward relative to the left rear foot rod 4 and the right rear foot rod 6 through the left hinge connecting device 2 and the right hinge connecting device 5; when the front foot frame 1 is to be folded, the front foot frame 1 is folded towards the left rear foot rod 4 and the right rear foot rod 6 through the left hinge connecting device 2 and the right hinge connecting device 5 to compress the space; when the front foot frame 1 is to be unfolded, the front foot frame 1 is flipped forward and opened through the left hinge connecting device 2 and the right hinge connecting device 5, away from the left rear foot rod 4 and the right rear foot rod 6; the above hinge is simple and convenient to use.

[0035] Further of the preferred technical solution:

[0036] The front foot frame 1 includes a left forward-inclined rod 11, a front cross beam rod 12, and a right forward-inclined rod 13. The front cross beam rod 12 is fixedly connected by welding at the bottom between the left forward-inclined rod 11 and the right forward-inclined rod 13 to form a basic structure, which is simple and firm; the bottom of the left forward-inclined rod 11 is used to install the left front wheel; the bottom of the right forward-inclined rod 13 is used to install the right front wheel;

[0037] The upper part of the left forward-inclined rod 11 and the upper part of the left rear foot rod 4 are connected by a left hinge connecting device 2; the upper right part of the right forward-inclined rod 13 and the upper part of the right rear foot rod 6 are connected by a right hinge connecting device 5; the above structure is simple, easy to produce, easy to install, and has good practical effects.

[0038] Further of the preferred technical solution:

[0039] The left hinge connecting device 2 includes a left first transverse through-hole 21, a left screw assembly 22, and a left second transverse through-hole 23. The upper part of the left forwardly inclined rod 11 is provided with the left first transverse through-hole 21, which is drilled by a metal processing machine; the upper part of the left rear foot rod 4 is provided with the left second transverse through-hole 23, which is drilled by a metal processing machine; the left first transverse through-hole 21 and the left second transverse through-hole 23 are jointly penetrated and connected with the left screw assembly 22, and are tightened and anti-detached through the left screw assembly 22; the left screw assembly 22 can be replaced by a rivet; the left forwardly inclined rod 11 is arranged inside the left rear foot rod 4; the left forwardly inclined rod 11 forms a movable hinge connection with the left rear foot rod 4 through the left screw assembly 22.

[0040] The right hinge connecting device 5 includes a right first transverse through-hole 51, a right screw assembly 52, and a right second transverse through-hole 53. The upper part of the right forwardly inclined rod 13 is provided with the right first transverse through-hole 51, which is drilled by a metal processing machine; the upper part of the right rear foot rod 6 is provided with the right second transverse through-hole 53, which is drilled by a metal processing machine; the right first transverse through-hole 51 and the right second transverse through-hole 53 are jointly penetrated and connected with the right screw assembly 52, and are tightened and anti-detached through the right screw assembly 52; the right screw assembly 52 can be replaced by a rivet; the right forwardly inclined rod 13 is arranged inside the right rear foot rod 6; the right forwardly inclined rod 13 forms a movable hinge connection with the right rear foot rod 6 through the right screw assembly 52.

[0041] The front foot frame 1 forms a movable hinge connection with the left rear foot rod 4 and the right rear foot rod 6 through the left screw assembly 22 and the right screw assembly 52; the above structure is simple, the hinge is flexible, convenient to use, and easy to install.

[0042] Further of the preferred technical solution:

[0043] The left hinge connecting device 2 includes a left inner connecting head 201, a left outer connecting head 202, and a left central shaft nail member 203. The left inner connecting head 201 is integrally injection-molded, and the left outer connecting head 202 is integrally injection-molded; the left inner connecting head 201 is attached and connected to the left outer connecting head 202, and the left central shaft nail member 203 is horizontally connected through the center points of the left inner connecting head 201 and the left outer connecting head 202. The left inner connecting head 201 is movably hinged to the left outer connecting head 202 through the left central shaft nail member 203, and the left inner connecting head 201 can flip / rotate relative to the left outer connecting head 202 through the left central shaft nail member 203; the front end of the left inner connecting head 201 is fixedly connected to the upper top of the left forwardly inclined rod 11, and they are integrally fixed by horizontally penetrating and riveting; the rear end of the left outer connecting head 202 is fixedly connected to the upper top of the left rear foot rod 4, and they are integrally fixed by horizontally penetrating and riveting; the above left hinge connecting device 2 has a simple structure, flexible hinge movement between the connecting heads, is more beautiful, and has a higher grade.

[0044] The right hinge connecting device 5 includes a right inner connecting head 501, a right outer connecting head 502, and a right central axis nail member 503. The right inner connecting head 501 is integrally injection molded, and the right outer connecting head 502 is integrally injection molded. The right inner connecting head 501 is attached to the right outer connecting head 502. The right central axis nail member 503 passes through and connects the center points of the right inner connecting head 501 and the right outer connecting head 502. The right inner connecting head 501 is movably hinged to the right outer connecting head 502 through the right central axis nail member 503. The left inner connecting head 201 can flip / rotate relative to the left outer connecting head 202 through the left central axis nail member 203. The front end of the right inner connecting head 501 is fixedly connected to the upper top of the right forwardly inclined rod 13, and the rear end of the right outer connecting head 502 is fixedly connected to the upper top of the right rear foot rod 6. They are fixedly connected as a whole by a transverse rivet. The above-mentioned right hinge connecting device 5 has a simple structure, flexible hinge movement between the connecting heads, is more beautiful, and has a higher grade.

[0045] The front footrest 1, the left inner connecting head 201, and the right inner connecting head 501 form a movable hinge connection with the left rear foot rod 4 and the right rear foot rod 6 through the left central axis nail member 203 and the right central axis nail member 503. That is, the front footrest 1, the left inner connecting head 201, and the right inner connecting head 501 can jointly perform a flip-type movable hinge relative to the left rear foot rod 4 and the right rear foot rod 6 through the left central axis nail member 203 and the right central axis nail member 503.

[0046] The side surface of the left forwardly inclined rod 11 after unfolding relative to the left rear foot rod 4 is in a "V" shape, which is beautiful. The side surface of the right forwardly inclined rod 13 after unfolding relative to the right rear foot rod 6 is in a "V" shape, which is beautiful.

[0047] A rear cross beam rod 7 is fixedly connected by welding between the left rear foot rod 4 and the right rear foot rod 6. The left rear foot rod 4, the right rear foot rod 6, and the rear cross beam rod 7 form a rear footrest, and the overall structure is firm.

[0048] A left brake mounting hole 42 is provided at the bottom section of the left rear foot rod 4 for installing a left rear foot wheel brake device. A right brake mounting hole 62 is provided at the bottom section of the right rear foot rod 6 for installing a right rear foot wheel brake device.

[0049] A left lock buckle mounting hole 43 is provided at the bottom section of the left rear foot rod 4 for installing a left lock buckle device for the wheelchair backrest. A right lock buckle mounting hole 63 is provided at the bottom section of the right rear foot rod 6 for installing a right lock buckle device for the wheelchair backrest. A left rear foot wheel mounting hole 44 is provided at the bottom end of the left rear foot rod 4 for installing a left rear foot wheel. A right rear foot wheel mounting hole 64 is provided at the bottom end of the right rear foot rod 6 for installing a right rear foot wheel.

[0050] Specific structural example 1:

[0051] A wheelchair frame, comprising a front footrest 1, a left hinge connecting device 2, a right hinge connecting device 5, a left rear footrest rod 4, and a right rear footrest rod 6, with the left rear footrest rod 4 and the right rear footrest rod 6 being symmetric left and right;

[0052] The left rear footrest rod 4 is integrally bent and formed by a metal processing machine; the upper end of the left rear footrest rod 4 is upward-facing, and the rear lower end is horizontally axially rearward. Between the upper end and the rear lower end of the left rear footrest rod 4, it is curved downward in an arc transition. There is a large left arc bending space 41 formed between the upper end and the rear lower end of the left rear footrest rod 4, and the large left arc bending space 41 is in the upper left rear; the lower bottom of the left rear footrest rod 4 is used to install the left rear wheel;

[0053] The right rear footrest rod 6 is integrally bent and formed by a metal processing machine; the upper end of the right rear footrest rod 6 is upward-facing, and the rear lower end is horizontally axially rearward. Between the upper end and the rear lower end of the right rear footrest rod 6, it is curved downward in an arc transition. There is a large right arc bending space 61 formed between the upper end and the rear lower end of the right rear footrest rod 6, and the large right arc bending space 61 is in the upper right rear; the lower bottom of the right rear footrest rod 6 is used to install the right rear wheel;

[0054] The front footrest 1 includes a left forward-inclined rod 11, a front cross beam rod 12, and a right forward-inclined rod 13. The front cross beam rod 12 is fixedly connected by welding at the bottom between the left forward-inclined rod 11 and the right forward-inclined rod 13 to form a basic structure, which is simple and firm; the bottom of the left forward-inclined rod 11 is used to install the left front wheel; the bottom of the right forward-inclined rod 13 is used to install the right front wheel;

[0055] The left hinge connecting device 2 includes a left first horizontal through hole 21, a left screw assembly 22, and a left second horizontal through hole 23. The upper part of the left forward-inclined rod 11 is provided with the left first horizontal through hole 21, which is drilled by a metal processing machine; the upper part of the left rear footrest rod 4 is provided with the left second horizontal through hole 23, which is drilled by a metal processing machine; the left first horizontal through hole 21 and the left second horizontal through hole 23 are jointly penetrated and connected with the left screw assembly 22, and are tightened and anti-detached through the left screw assembly 22; the left screw assembly 22 can be replaced by a rivet; the left forward-inclined rod 11 is arranged inside the left rear footrest rod 4; the left forward-inclined rod 11 forms a movable hinge connection with the left rear footrest rod 4 through the left screw assembly 22.

[0056] The right hinge connection device 5 includes a right first transverse through hole 51, a right screw assembly 52, and a right second transverse through hole 53. The upper part of the right forwardly inclined rod 13 is provided with the right first transverse through hole 51, which is drilled with a metal processing machine; the upper part of the right rear foot rod 6 is provided with the right second transverse through hole 53, which is drilled with a metal processing machine; the right first transverse through hole 51 and the right second transverse through hole 53 are jointly penetrated and connected with the right screw assembly 52, and are tightened to prevent loosening through the right screw assembly 52; the right screw assembly 52 can be replaced by a rivet; the right forwardly inclined rod 13 is arranged inside the right rear foot rod 6; the right forwardly inclined rod 13 forms a movable hinge connection with the right rear foot rod 6 through the right screw assembly 52.

[0057] The front foot frame 1 forms a movable hinge connection with the left rear foot rod 4 and the right rear foot rod 6 through the left screw assembly 22 and the right screw assembly 52; the above structure is simple, the hinge is flexible, convenient to use, and easy to install.

[0058] A rear cross beam rod 7 is fixedly connected by welding between the left rear foot rod 4 and the right rear foot rod 6. The left rear foot rod 4, the right rear foot rod 6, and the rear cross beam rod 7 form a rear foot frame, and the overall structure is firm.

[0059] Specific structural example 2:

[0060] A wheelchair frame includes a front foot frame 1, a left hinge connection device 2, a right hinge connection device 5, a left rear foot rod 4, and a right rear foot rod 6. The left rear foot rod 4 and the right rear foot rod 6 are symmetrical left and right;

[0061] The left rear foot rod 4 is integrally bent and formed with a metal processing machine; the upper end of the left rear foot rod 4 is set upward, and the rear lower end is set horizontally backward. There is a downward arc-shaped bending transition between the upper end and the rear lower end of the left rear foot rod 4. A left-side arc-shaped large bending space 41 is formed between the upper end and the rear lower end of the left rear foot rod 4, and the left-side arc-shaped large bending space 41 is in the upper left rear; the lower bottom of the left rear foot rod 4 is used for installing a left rear wheel;

[0062] The right rear foot rod 6 is integrally bent and formed with a metal processing machine; the upper end of the right rear foot rod 6 is set upward, and the rear lower end is set horizontally backward. There is a downward arc-shaped bending transition between the upper end and the rear lower end of the right rear foot rod 6. A right-side arc-shaped large bending space 61 is formed between the upper end and the rear lower end of the right rear foot rod 6, and the right-side arc-shaped large bending space 61 is in the upper right rear; the lower bottom of the right rear foot rod 6 is used for installing a right rear wheel;

[0063] The front foot frame 1 includes a left forwardly inclined rod 11, a front cross beam rod 12, and a right forwardly inclined rod 13. The front cross beam rod 12 is fixedly connected by welding at the bottom between the left forwardly inclined rod 11 and the right forwardly inclined rod 13 to form a basic structure, which is simple and firm; the bottom of the left forwardly inclined rod 11 is used for installing a left front wheel; the bottom of the right forwardly inclined rod 13 is used for installing a right front wheel;

[0064] The left hinge connecting device 2 includes a left inner connecting head 201, a left outer connecting head 202, and a left central shaft nail 203. The left inner connecting head 201 is integrally injection-molded, and the left outer connecting head 202 is integrally injection-molded; the left inner connecting head 201 is adhesively connected to the left outer connecting head 202, and the left central shaft nail 203 is transversely connected to the center points of the left inner connecting head 201 and the left outer connecting head 202. The left inner connecting head 201 is movably hinged to the left outer connecting head 202 through the left central shaft nail 203. The left inner connecting head 201 can be flipped / rotated relative to the left outer connecting head 202 through the left central shaft nail 203; the front end of the left inner connecting head 201 is fixedly connected to the upper top of the left forwardly inclined rod 11, and they are integrally fixed by a transverse rivet; the rear end of the left outer connecting head 202 is fixedly connected to the upper top of the left rear foot rod 4, and they are integrally fixed by a transverse rivet; the above-mentioned left hinge connecting device 2 has a simple structure, flexible hinge movement between the connecting heads, is more beautiful, and has a higher grade.

[0065] The right hinge connecting device 5 includes a right inner connecting head 501, a right outer connecting head 502, and a right central shaft nail 503. The right inner connecting head 501 is integrally injection-molded, and the right outer connecting head 502 is integrally injection-molded; the right inner connecting head 501 is adhesively connected to the right outer connecting head 502, and the right central shaft nail 503 is transversely connected to the center points of the right inner connecting head 501 and the right outer connecting head 502. The right inner connecting head 501 is movably hinged to the right outer connecting head 502 through the right central shaft nail 503. The left inner connecting head 201 can be flipped / rotated relative to the left outer connecting head 202 through the left central shaft nail 203; the front end of the right inner connecting head 501 is fixedly connected to the upper top of the right forwardly inclined rod 13, and the rear end of the right outer connecting head 502 is fixedly connected to the upper top of the right rear foot rod 6, and they are integrally fixed by a transverse rivet; the above-mentioned right hinge connecting device 5 has a simple structure, flexible hinge movement between the connecting heads, is more beautiful, and has a higher grade.

[0066] The front foot frame 1, the left inner connecting head 201, and the right inner connecting head 501 form a movable hinge connection with the left rear foot rod 4 and the right rear foot rod 6 through the left central shaft nail 203 and the right central shaft nail 503; that is, the front foot frame 1, the left inner connecting head 201, and the right inner connecting head 501 can be flip-movably hinged relative to the left rear foot rod 4 and the right rear foot rod 6 through the left central shaft nail 203 and the right central shaft nail 503.

[0067] A rear cross beam rod 7 is fixedly connected by welding between the left rear foot rod 4 and the right rear foot rod 6. The left rear foot rod 4, the right rear foot rod 6, and the rear cross beam rod 7 form a rear foot frame, and the overall structure is firm.

Claims

1. A wheelchair frame, comprising a front footrest, a left hinge connecting device, a right hinge connecting device, a left rear footrest rod, and a right rear footrest rod. The left rear footrest rod and the right rear footrest rod are symmetric left and right. It is characterized in that: The left rear footrest rod is integrally formed; the upper end of the left rear footrest rod is upward-facing, and the lower rear end is horizontally axially backward. Between the upper end and the lower rear end of the left rear footrest rod, it is curved downward in an arc transition. There is a large left-side arc-shaped bending space formed between the upper end and the lower rear end of the left rear footrest rod; The right rear footrest rod is integrally formed; the upper end of the right rear footrest rod is upward-facing, and the lower rear end is horizontally axially backward. Between the upper end and the lower rear end of the right rear footrest rod, it is curved downward in an arc transition. There is a large right-side arc-shaped bending space formed between the upper end and the lower rear end of the right rear footrest rod; The upper left part of the front footrest is connected to the upper part of the left rear footrest rod through the left hinge connecting device; The upper right part of the front footrest is connected to the upper part of the right rear footrest rod through the right hinge connecting device; The front footrest can be turned forward and backward and folded relative to the left rear footrest rod and the right rear footrest rod through the left hinge connecting device and the right hinge connecting device.

2. A wheelchair frame according to claim 1, characterized in that: The front footrest includes a left forward-inclined rod, a front cross beam rod, and a right forward-inclined rod. The front cross beam rod is fixedly connected to the bottom between the left forward-inclined rod and the right forward-inclined rod; The upper part of the left forward-inclined rod is connected to the upper part of the left rear footrest rod through the left hinge connecting device; The upper right part of the right forward-inclined rod is connected to the upper part of the right rear footrest rod through the right hinge connecting device.

3. A wheelchair frame according to claim 2, characterized in that: The left hinge connecting device includes a left first horizontal through hole, a left screw assembly, and a left second horizontal through hole. The upper part of the left forward-inclined rod is provided with a left first horizontal through hole; the upper part of the left rear footrest rod is provided with a left second horizontal through hole; the left first horizontal through hole and the left second horizontal through hole are jointly penetrated and connected with a left screw assembly; the left forward-inclined rod is arranged inside the left rear footrest rod; The right hinge connecting device includes a right first horizontal through hole, a right screw assembly, and a right second horizontal through hole. The upper part of the right forward-inclined rod is provided with a right first horizontal through hole; the upper part of the right rear footrest rod is provided with a right second horizontal through hole; the right first horizontal through hole and the right second horizontal through hole are jointly penetrated and connected with a right screw assembly; the right forward-inclined rod is arranged inside the right rear footrest rod; The front footrest forms a movable hinge connection with the left rear footrest rod and the right rear footrest rod through the left screw assembly and the right screw assembly.

4. A wheelchair frame according to claim 2, characterized in that: The left hinge connecting device includes a left inner connecting head, a left outer connecting head, and a left central shaft nail piece. The left inner connecting head and the left outer connecting head are fitted and connected. The left central shaft nail piece horizontally penetrates and connects at the center points of the left inner connecting head and the left outer connecting head. The left inner connecting head is movably hinged to the left outer connecting head through the left central shaft nail piece; the left inner connecting head is fixedly connected to the upper top of the left forward-inclined rod, and the left outer connecting head is fixedly connected to the upper top of the left rear footrest rod; The right articulated connection device includes a right inner connection head, a right outer connection head, and a right central shaft nail. The right inner connection head is attached to the right outer connection head, and the right central shaft nail passes through and connects to the center points of the circles of the right inner connection head and the right outer connection head. The right inner connection head is movably and articulately connected to the right outer connection head through the right central shaft nail; the right inner connection head is fixedly connected to the upper top of the right forward-tilting rod, and the right outer connection head is fixedly connected to the upper top of the right rear foot rod; The front footrest, the left inner connection head, and the right inner connection head form a movable articulated connection with the left rear foot rod and the right rear foot rod through the left central shaft nail and the right central shaft nail.

5. The wheelchair frame according to claim 2, characterized in that: The side of the left forward-tilting rod after unfolding relative to the left rear foot rod is in a "human" shape.

6. A wheelchair frame according to claim 2, wherein: The side of the right forward-tilting rod after unfolding relative to the right rear foot rod is in a "human" shape.

7. A wheelchair frame according to any one of claims 1 to 4, characterized in that: The front footrest is made of aluminum or iron metal.

8. A wheelchair frame according to any one of claims 1 to 4, characterized in that: A rear cross beam rod is fixedly connected between the left rear foot rod and the right rear foot rod.

9. A wheelchair frame according to any one of claims 1 to 4, characterized in that: The front footrest is made of a round tube or a flat tube.

10. A wheelchair frame according to any one of claims 1 to 4, characterized in that: The left rear foot rod and the right rear foot rod are made of a round tube or a flat tube; the left rear foot rod and the right rear foot rod are made of aluminum or iron metal.

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