Folding load tube and folding barrier tube for a folding wheelchair

Abstract

The folding load pipe and folding barrier pipe of the left and right folding wheelchair, both pipes are made of stainless steel or aluminum alloy, are sawed into two halves in the center of the pipe and are connected into one pipe by hinges, the connecting position in the pipe is provided with a positioning core block and a spring, the two ends of the folding load pipe are provided with positioning rings and are installed on the rod of the anti-rear-rolling wheel under the wheelchair, the two ends of the folding barrier pipe are provided with positioning pieces and are fixed on the backrest rod of the wheelchair, the seat cushion is pulled up to fold the wheelchair left and right, the two folding pipes are synchronously folded under the action of the hinges, the seat pipe is pressed to open the folded wheelchair, the two folding pipes are also synchronously opened, the folding load pipe can hold the trolley case, a stretchable belt is used to tightly hold the trolley case on the folding barrier pipe and under the trolley case, the left and right folding wheelchair can walk with the trolley case, and the function that the left and right folding electric wheelchair can also carry the trolley case to walk is achieved.

Description

Technical Field

[0001] This technology belongs to the field of wheelchairs for use by people with disabilities, the elderly with mobility difficulties, and patients. Background Technology

[0002] Wheelchairs are a means of transportation for people with disabilities, the elderly with mobility difficulties, and hospital patients. Currently, there are many varieties and models available. Manually pushed wheelchairs are mostly side-folding, while electric wheelchairs are increasingly popular due to their convenience. Lightweight folding wheelchairs and lightweight electric folding wheelchairs are particularly popular. Side-folding wheelchairs are especially favored for their quick one-step folding, minimal size after folding, and light weight, making them the preferred choice for people who need wheelchairs when traveling. Even families with small homes often prefer lightweight side-folding wheelchairs. However, the small size and light weight of side-folding wheelchairs mean they lack many of the features of larger wheelchairs. Large wheelchairs are bulky and heavy, and while they can have multiple functions, such as a carrying basket on the back, their weight makes them difficult to move or take on trips. Lightweight side-folding wheelchairs are popular because their small size limits the carrying of items. People often carry a lot of luggage when traveling, most commonly a four-wheeled suitcase. However, when using a folding wheelchair, it's impossible to carry another suitcase or other large items. Utility Model Content

[0003] This invention discloses a folding cargo tube and a folding cargo stop tube for a lightweight left-right folding wheelchair, enabling the wheelchair to carry a suitcase, bag, or basket while moving, and maintaining the folding function of the wheelchair in sync with the left-right folding motion.

[0004] The lightweight, folding wheelchair features a folding cargo tube and a folding guard tube. The structure of these tubes is as follows: Both the cargo tube and guard tube are made of stainless steel or aluminum alloy round tubing with an outer diameter of 22-28mm. The stainless steel tube has a wall thickness of 1.4-1.8mm, while the aluminum alloy tube has a wall thickness of 2.4-3.2mm. The length of the cargo tube is the total width of the two anti-rollover wheels when the wheelchair is extended, plus 20mm. The tube is then cut in half at its center, resulting in a left and right half. These two halves are aligned and joined together. A hinge is placed below the joint, and two hinge blades are screwed to the lower wall of each half. A 50mm long aluminum alloy positioning core is installed inside the joined halves, extending 40mm into the hole within the left half and secured with screws. The 10mm extension can fit into the hole of the right half of the round tube. A spring seat rod is vertically installed inside the right half of the round tube, and the spring is fixed to the spring seat rod with screws. One end of the spring rests on the top of the positioning core block. Movable positioning rings are set at both ends of the hinge plane of the folding cargo tube. The inner hole of the movable positioning ring fits onto the anti-tilt wheel rod under the wheelchair. There is a gap of 0.2-0.5mm in the ring so that it can rotate flexibly. The movable rod on the positioning ring rests on the 6mm wide folding cargo tube. Inside the 12mm long hole, there is a screw on the movable rod. It is fixed with a nut and an arc-shaped washer. There is a gap of 0.15-0.3mm between the arc-shaped washer and the inner wall of the folding cargo tube. The left half of the round tube and the right half of the round tube are capped. Two folding cargo tubes are set side by side. The two left half round tubes are connected into one body by two connecting rods, and the two right half round tubes are connected into one body by two connecting rods, forming a double folding cargo tube, which can carry more and more stable cargo.

[0005] The lightweight, left-right folding wheelchair features a folding cargo tube and a folding backrest. The structures of the cargo tube and backrest are identical in the tube portion, differing only in the connection points at both ends. The difference lies in their application to the wheelchair: the cargo tube is mounted on the anti-tilt wheel bar under the wheelchair, with the hinge located at the bottom of the tube, and folds upwards; the backrest has the same structure but is mounted in the opposite position, attached to the backrest bar above the wheelchair, with the hinge located at the top of the tube. The folding barrier tube folds downwards. The structure of the folding barrier tube is as follows: the material is a stainless steel or aluminum alloy round tube with an outer diameter of 22-28mm. The stainless steel wall thickness is 1.4-1.8mm, and the aluminum alloy wall thickness is 2.4-3.2mm. The length of the round tube is determined by adding 20mm to the total width of the two backrests when the folding wheelchair is unfolded. It is then cut in half at the center, resulting in a left and right half. The left and right half are aligned and joined together. At the joint... A hinge is placed on the surface, with two hinge leaves fixed to the upper walls of the left and right halves of the tube with screws, respectively. Positioning core blocks, made of aluminum alloy and 50mm long, are installed inside the left and right halves of the tube at the joint. The 40mm long core block is placed within the hole in the right half of the tube and secured with screws. The 10mm longer core block can extend into the hole in the left half of the tube. A spring seat rod is vertically installed inside the left half of the tube, with the spring fixed to the rod by screws. One end of the spring rests below the positioning core block. The folding guard tube has movable positioning plates at both ends of the hinge plane. The movable positioning plates are positioned at 90 degrees perpendicular to the hinge plane. They are fixed to the inner side of the wheelchair backrest rod with screws passing through the middle hole of the movable positioning plates. The positioning plate movable rod and the screw on the positioning plate movable rod are placed in the 6mm x 12mm long hole of the folding guard tube. An arc-shaped washer is added and the tube is fixed with a nut. There is a gap of 0.15 to 0.3mm between the arc-shaped washer and the tube wall of the inner hole of the folding guard tube. The tube openings of the left half of the round tube and the right half of the round tube are covered with tube caps.

[0006] This method involves assembling the folding cargo tube and folding backrest tube onto the back of the wheelchair. Pressing down the seat cushion unfolds the wheelchair, and the two folding tubes open simultaneously. A suitcase, bag, or basket can be placed on the cargo tube, with the backrest tube resting on top. An elastic band secures the suitcase, bag, or basket to the backrest tube, and another band is attached to the bottom of the wheelchair backrest. The person in the wheelchair can then carry the suitcase, bag, or basket. Upon arrival, the elastic band is released, the suitcase, bag, or basket is removed, and the seat cushion is lifted to fold the wheelchair to the left or right. The cargo tube folds upwards via the hinge, and the backrest tube folds downwards via the hinge, folding synchronously with the wheelchair. The folded position is within the handlebar range, maintaining the wheelchair's folding function without increasing its size. Using stainless steel or aluminum alloy materials adds less than 480 grams of weight, achieving an ultra-lightweight left-right folding wheelchair capable of carrying a suitcase, thus increasing its luggage-carrying capacity. Attached Figure Description

[0007] Figure 1 This is a bottom view of the folded cargo tube.

[0008] Figure 2 This is a side sectional view of the folding cargo tube.

[0009] Figure 3 This is a diagram showing the upward folding process of the folding cargo tube.

[0010] Figure 4 This is a bottom view of the double-folded cargo pole.

[0011] Figure 5 This is a side sectional view of the folding barrier tube.

[0012] Figure 6 This is an internal view of the folding baffle tube.

[0013] Figure 7 This is a diagram showing the positions of the folding cargo tube and folding guard tube on the back of a folding wheelchair.

[0014] Figure 8 This is a side view of two different ways of carrying a folding wheelchair.

[0015] Figure 9 It's the elastic band that secures the suitcase.

[0016] Figure 10 This is a structural diagram of a lightweight, left-right folding wheelchair. The cargo tube and the cargo barrier fold simultaneously after folding.

[0017] Figure 11 This is a structural diagram of the active positioning circle.

[0018] Appendix Figure 1Appendix Figure 2 Appendix Figure 3 1 is the elongated hole, 2 is the left half of the folding cargo tube, 3 is the hinge fixing rivet, 4 is the positioning core block, 5 is the hinge shaft, 6 is the hinge leaf, 7 is the right half of the folding cargo tube, 8 is the movable positioning ring, 9 is the tube cap, 10 is the spring base rod, 11 is the bolt, 12 is the spring, 13 is the nut, and 14 is the movable rod of the positioning ring.

[0019] Appendix Figure 3 1 is the elongated hole, 2 is the left half of the folding cargo tube, 3 is the hinge fixing rivet, 4 is the positioning core block, 5 is the hinge shaft, 6 is the hinge leaf, 7 is the right half of the folding cargo tube, 8 is the movable positioning ring, 9 is the tube cap, 10 is the spring base rod, 11 is the bolt, 12 is the spring, 13 is the nut, 14 is the movable rod of the positioning ring, and 16 is the wheelchair anti-tilt rod.

[0020] Appendix Figure 4 In the diagram, 2 represents the left half of the folding cargo tube, 7 represents the right half of the folding cargo tube, 2.3 represents the added double-layered left half of the folding cargo tube, 7.3 represents the added double-layered right half of the folding cargo tube, and 15 represents the double-layered connecting rod.

[0021] Appendix Figure 5 Appendix Figure 6 In the diagram, 1 is the elongated hole, 2.1 is the right half of the round tube of the folding stop, 3 is the hinge fixing rivet, 4 is the positioning core block, 5 is the hinge shaft, 6 is the hinge leaf, 7.1 is the left half of the round tube of the folding stop, 8.1 is the movable positioning plate, 9 is the tube cap, 10 is the spring base rod, 11 is the bolt, 12 is the spring, 13 is the nut, and 14.1 is the movable rod of the positioning plate.

[0022] Appendix Figure 7 In the diagram, 2 is the left half of the folding cargo tube, 8 is the movable positioning ring, 6 is the hinge leaf, 7 is the right half of the folding cargo tube, 16 is the wheelchair anti-tilt bar, 17 is the wheelchair folding bar, 18 is the wheelchair seat, 2.1 is the right half of the folding guardrail tube, 8.1 is the movable positioning plate, 19 is the wheelchair backrest, and 7.1 is the left half of the folding guardrail tube.

[0023] Appendix Figure 8 8 is the movable positioning ring, 7 is the right half of the folding cargo tube, 7.3 is the double-connected right half of the folding cargo tube, 20 is the suitcase wheel, 21 is the rectangular suitcase (dashed line), 22 is the suitcase, 23 is the low-position folding guard tube, 24 is the elastic band, and 2.1 is the right half of the folding guard tube.

[0024] Appendix Figure 9 24 is the elastic band, and 25 is the hook.

[0025] Appendix Figure 108 is the movable positioning ring, 2 is the left half of the folding cargo tube, 7 is the right half of the folding cargo tube, 16 is the wheelchair anti-tilt bar, 17 is the wheelchair folding bar, 2.1 is the right half of the folding guard tube, 8.1 is the movable positioning plate, 18 is the wheelchair seat, 19 is the wheelchair backrest, 7.1 is the left half of the folding guard tube, and 5 is the hinge shaft.

[0026] Appendix Figure 11 In the diagram, 8 is the positioning ring, 1 is the elongated hole, 13 is the nut, and 14 is the movable rod. Detailed Implementation

[0027] The following detailed description, with reference to the accompanying drawings, illustrates the structure and implementation method of the folding cargo tube and folding deflector for carrying cargo on the back of a lightweight, left-right folding wheelchair. The structure is designed as follows: The primary materials used are stainless steel or aluminum alloy round tubes, ensuring strength and a smooth, aesthetically pleasing finish. Stainless steel maintains its smoothness over time, while aluminum alloy is lightweight. Both materials have specifications listed in national standards and are readily available in the market. The outer diameter of the folding cargo tube and folding deflector is 22–28 mm. The wall thickness for stainless steel is 1.4–1.8 mm, and for aluminum alloy, it is 2.4–3.2 mm. The length of the folding cargo tube is the total width of the two left and right anti-tilt wheel rods (16) when the wheelchair is extended, plus 20 mm, and is centered on the length of the tube. The tube is cut open to form two halves: a left half (2) and a right half (7). The two halves are aligned and joined together. A hinge pin (5) is installed below the joint of the folded tubes 2 and 7. Two hinge leaves (6) are fixed to the tube walls below the left and right halves (2 and 7) with screws (3). With the hinges located below the tubes, the tubes can only open upwards during folding, causing both halves (2 and 7) to fold upwards simultaneously. A positioning core block (4) is installed inside the joint of the left and right halves (2 and 7). The positioning core block (4) is made of aluminum alloy, 50mm long, and 40mm long within the hole of the left half (2). It is securely fixed with screws at the top and bottom. The extra 10mm can extend into or out of the right half (2 and 7). Inside the hole of the circular tube 7, the positioning core block 4 concentrically connects the two semi-circular tubes and strengthens the joint, making the left half-circular tube 2 and the right half-circular tube 7 as a single tube. A spring seat rod 10 is vertically installed inside the right half-circular tube 7. One end of the spring 12 is fixed to the spring seat rod 10 by a bolt 11, and the other end of the spring 12 rests on top of the positioning core block 4. The function of the spring 12 is to lift the top of the positioning core block 4 normally, so that when there is no load on the left half-circular tube 2 and the right half-circular tube 7, there is always an opening of 2-3mm. When the folding loading tubes 2 and 7 are folded, the spring 12 does not expose the plane of the folding loading tube 7. When the seat cushion 18 is pulled to fold the wheelchair, the folding loading tubes 2 and 7 can automatically and synchronously fold upwards, which can be used at any time. It is foldable and does not require manual operation. The folding cargo tubes 2 and 7 have movable positioning rings 8 at both ends of the hinge plane. The inner hole of the movable positioning ring 8 fits onto the left and right anti-tilt wheel rods 16 of the wheelchair. This utilizes the existing wheelchair structure. The movable positioning rings 8 are located at the base of the left and right anti-tilt wheel rods 16, providing sufficient strength. There is a 0.2–0.5 mm gap between the inner hole of the movable positioning ring 8 and the left and right anti-tilt wheel rods 16, allowing for rotation. This gap allows the folding cargo tubes 2 and 7 to rotate flexibly. The positioning rod 14 on the positioning ring 8 and the screw on the positioning rod 14 are placed inside the 6mm x 12mm long hole 1 of the folding cargo tubes 2 and 7, and secured with an arc-shaped washer and nut 13. The arc-shaped washer has a 0.15–0.5 mm gap with the wall of the inner hole of the folding cargo tubes 2 and 7.The 3mm gap and elongated hole 1 allow for flexible placement of the folding cargo tubes 2 and 7. The left half of the round tube 2 and the right half of the round tube 7 are capped with tube caps 9, which prevent debris from falling into the tubes and also serve an aesthetic purpose. When the left and right folding wheelchairs are opened and closed, they are not always in the same position, resulting in varying widths and vibrations, especially during movement when the left and right wheels swing up and down. These situations inevitably cause the distance between the two anti-rollover wheel rods 16 and the two positioning rings to vary. The elongated hole 1 of the folding cargo tubes 2 and 7 serves as a buffer. When the folding cargo tubes 2 and 7 move, the positioning rod 14 of the positioning ring 8 can swing accordingly within the elongated hole 1. The positioning rod 14 extends in, ensuring that the folding cargo tubes 2 and 7 remain stable when the wheelchair changes position. One of the folding cargo tubes 2 and 7 is installed on the back of the wheelchair, which can hold a wheeled suitcase 22 with two wheels. The 20-inch wheelchair is secured to the folding cargo tubes 2 and 7 without falling off. The upper part of the suitcase 22 rests against the folding cargo tubes 7.1 and 2.1. Elastic straps 24 are then used to secure the suitcase 22, with one strap hanging from the cargo tube and the next from the bottom. The elastic straps 24 have hooks 25 at both ends, making it easy to attach them to any arm of the wheelchair to secure the suitcase 22. The suitcase 22 is then stably positioned at the back of the folding wheelchair. When the person is seated in the wheelchair, the suitcase is securely attached to the back of the wheelchair. Moving the suitcase 22 forward, two folding cargo tubes 2 and 7 are arranged side by side, thus adding folding cargo tubes 2.3 and 7.3. Two double-connecting rods 15 connect the two left halves of the round tubes 2 and 2.3 into one unit, and two double-connecting rods 15 connect the two right halves of the round tubes 7 and 7.3 into one unit, forming a double-connected folding cargo tube. This increases the surface area that can hold items, allowing for the placement of flat-bottomed boxes 21, bags, or baskets. The double-connected folding cargo tube provides greater capacity and stability.

[0028] The lightweight, left-right folding wheelchair features a folding cargo tube and a folding backrest tube for carrying cargo. The folding backrest tubes 7.1 and 2.1 use the same structure and materials as the folding cargo tubes 2 and 7, and their structures are largely identical. One difference lies in their assembly on the left-right folding wheelchair: the hinge 5 of the folding cargo tubes 2 and 7 is located at the bottom of the tube, while the hinge 5 of the folding backrest tubes 7.1 and 2.1 is located at the top. When the seat 18 of the wheelchair is pulled, the folding cargo tubes 2 and 7 automatically fold upwards synchronously, and the folding backrest tubes 2.1 and 7.1 automatically fold downwards synchronously. Another structural difference is the positioning connection at both ends of the tubes: one is a positioning ring 8 installed at the bottom, and the other is a positioning piece 8.1 installed at the top. The folding backrest tubes 7.1 and 2.1 are... The folding side rails 7.1 and 2.1 are designed using stainless steel or aluminum alloy round tubes. Stainless steel and aluminum alloy tubes offer guaranteed strength and a smooth, aesthetically pleasing finish, while aluminum alloy is lightweight. Both are national standard materials and are readily available on the market. The outer diameter of the folding side rails 7.1 and 2.1 is 22–28 mm. Stainless steel has a wall thickness of 1.4–1.8 mm, while aluminum alloy has a wall thickness of 2.4–3.2 mm. The length of the folding side rails 7.1 and 2.1 is the total width of the two backrest bars when the wheelchair is extended, plus 20 mm. The tubes are cut in half at the center, resulting in two halves: a left half (7.1) and a right half (2.1). These halves are then aligned and joined together. A hinge shaft 5 is installed at the top, and two hinge leaves 6 are fixed to the tube walls of the left half-circular tube 7.1 and the right half-circular tube 2.1 respectively with screws 3. Since the hinges are on the tubes, when folding, the tubes can only open downwards, and the left half-circular tube 7.1 and the right half-circular tube 2.1 fold downwards simultaneously. A positioning core block 4 is installed inside the left half-circular tube 7.1 and the right half-circular tube 2.1 at the joint. The positioning core block 4 is made of aluminum alloy, 50mm long, and 40mm long within the hole of the left half-circular tube 7.1, and is firmly fixed with screws. The extra 10mm can extend into the hole of the right half-circular tube 2.1. The positioning core block 4 concentrically connects the two half-circular tubes and strengthens the joint, making the left half-circular tube 7.1 and the right half-circular tube 2.1 a single unit. The strength of the tubes is ensured by a spring seat rod 10 vertically installed inside the right half of the round tube 2.1. One end of the spring 12 is fixed to the spring seat rod 10 by a bolt 11, and the other end of the spring 12 rests against the bottom of the positioning core block 4. The function of the spring 12 is to lift the bottom of the positioning core block 4 under normal circumstances, so that when there is no load on the left half of the round tube 7.1 and the right half of the round tube 2.1, there is always an opening of 2-3mm. When the folding guard tubes 7.1 and 2.1 are folded, the spring 12 does not protrude from the plane of the folding guard tube 2.1. When the seat cushion 18 is pulled to fold the wheelchair, the folding guard tubes 7.1 and 2.1 can automatically and synchronously fold downwards, so that they can be folded at any time without manual operation. Movable positioning plates 8.1 are set at both ends of the folding guard tube on the plane of the hinge 5.Position 1 is perpendicular to the plane of hinge 5 at 90 degrees. A screw is used to fix it to the wheelchair backrest rod 19 through the middle hole of the movable positioning plate 8.1. The positioning rod 14.1 on the movable positioning plate 8.1 and the screw on the positioning rod 14.1 are placed in the 6mm x 12mm long hole 1 of the folding cargo tube. An arc-shaped washer is added and secured with a nut 13. The arc-shaped washer has a gap of 0.15-0.3mm between it and the inner wall of the folding cargo tubes 7.1 and 2.1. The left half of the round tube 7.1 and the right half of the round tube 2.1 are capped with a tube cap 9. The tube cap 9 prevents debris from falling into the tube and also serves an aesthetic purpose. When the left and right folding wheelchairs are opened and closed, they are not always in the same position, and the width of the vibration varies each time. Especially during driving, the left and right wheels swing up and down. These situations inevitably cause the width of the two backrest rods 19 to vary during the swing. The long hole 1 of the folding cargo tubes 7.1 and 2.1 acts as a buffer. The positioning plate 8.1 of the positioning plate of the baffle tubes 7.1 and 2.1 can swing in length and length accordingly within the elongated hole 1, thus ensuring that the baffle tubes 7.1 and 2.1 remain stable when the wheelchair is folded. The backrests of the left and right folding wheelchairs are made of easy-to-fold textile fabric. When the suitcase 22 is placed on the folding baffle tubes 2 and 7, the height of the suitcase 22 reaches more than half of the backrest of the folding wheelchair, at which point it rests against the folding baffle tubes 7.1 and 2.1. Next, use elastic band 24 to secure the top of the suitcase 22 once, and then again around the bottom. The elastic band has hooks 25 at both ends, making it easy to hang on any bar of the wheelchair. This secures the top of the suitcase to the folding guardrail. The function of the folding guardrail 7.1 and 2.1 is to prevent the suitcase 22 from touching the backrest 19 of the folding wheelchair, ensuring the comfort of the person sitting in the folding wheelchair. When the folding wheelchair moves, it carries the suitcase 22 with it.

[0029] Install folding cargo tubes and folding cargo guards on the back of the left and right folding wheelchair. Press down the seat cushion 18 of the left and right folding wheelchair to open the wheelchair. Folding cargo tubes 2 and 7 and folding cargo guards 7.1 and 2.1 open simultaneously. A suitcase 22 can be placed on folding cargo tubes 2 and 7. All suitcases 22 have four wheels, two of which are straddled on folding cargo tubes 2 and 7, preventing the suitcase 22 from falling off. The suitcase 22 rests against folding cargo guards 7.1 and 2.1. Then, use an elastic band 24 to secure the suitcase 22 to the folding cargo guards 7.1 and 2.1, and the next band is secured to the bottom of the suitcase 22. The person in the wheelchair can then walk with the suitcase 22. It is possible that the suitcase 22 is angled on the back of the wheelchair, but as long as the elastic band 24 is tight, it will not affect the wheels. For wheelchairs, elastic bands 24 with hooks 25 at both ends are widely available and inexpensive. Upon arrival, remove the elastic band 24, take off the suitcase 22, and pull up the seat cushion 18 to fold the wheelchair. The folding cargo bars 2 and 7 fold upwards via the hinges, while the folding guard bars 7.1 and 2.1 fold downwards via the hinges, folding synchronously with the wheelchair. The folded position is within the handlebar range, maintaining the wheelchair's folding function without increasing its size. Using stainless steel or aluminum alloy materials adds less than 480 grams of weight, keeping it a lightweight left-right folding wheelchair while still allowing for luggage transport. Simply adding an elastic band 24 enhances the luggage-carrying function of this ultra-lightweight left-right folding wheelchair, making it particularly convenient for those using such wheelchairs. Folding cargo tubes 2 and 7 can be joined side-by-side to form double folding cargo tubes 2.1 and 7.1. Two double connecting rods 15 connect the left half of the folding cargo tube 2 and the left half of the double folding cargo tube 2.3, and two double connecting rods 15 connect the right half of the folding cargo tube 7 and the right half of the double folding cargo tube 7.3. The length of the double connecting rods 15 is between 7 cm and 17 cm, and the width is within the anti-rollover wheel. The double connecting rods and the folding cargo tubes are welded together by electric welding, which expands the plane of the folding cargo tubes. Boxes, cartons, baskets, or packages can be placed flat on the folding cargo tubes, greatly expanding the cargo carrying function. The folding stop tube can be lowered and installed on the wheelchair legs under the wheelchair seat, i.e., the low-position folding stop tube 23, which can fix low boxes and baskets, allowing the ultra-lightweight left and right folding wheelchair to adapt to carrying a variety of items.

[0030] The lightweight left-right folding wheelchair and lightweight left-right folding electric wheelchair are designed to be small, lightweight, and easy to carry for travel. When people travel, they inevitably have a lot of luggage, including suitcases. This invention solves the problem, allowing the ultra-small lightweight left-right folding wheelchair to carry large suitcases while maintaining the quick-folding function. It does not increase the size of the folded wheelchair and adds very little weight, less than 480 grams, while still maintaining the performance of a lightweight left-right folding wheelchair and a lightweight left-right folding electric wheelchair.

[0031] The above description is merely a preferred embodiment of the present invention and is illustrative rather than restrictive. Many dimensions and shapes can be appropriately modified to achieve the same effect. It is readily understood by those skilled in the art that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, and all of these will fall within the protection scope of the present invention.

Claims

1. A lightweight, left-right folding wheelchair with a folding cargo tube and a folding guard tube, characterized in that, Both the folding cargo tube and the folding wheelchair stop are made of stainless steel or aluminum alloy round tubes with an outer diameter of 22-28mm. The stainless steel wall thickness is 1.4-1.8mm, and the aluminum alloy wall thickness is 2.4-3.2mm. The length of the folding cargo tube is the total width of the two anti-rollover wheels when the wheelchair is extended, plus 20mm. The tube is cut in half at the center, resulting in a left and right half. The left and right halves are aligned and joined together. A hinge is placed below the joint, and two hinge blades are fixed to the lower wall of the left and right halves with screws. A positioning core, made of aluminum alloy and 50mm long, is installed inside the left and right halves at the joint. The core has a 40mm length within the hole in the left half and is secured with screws. The 10mm extension can reach into the right half. Inside the hole, a spring seat rod is vertically installed inside the right half of the round tube. The spring is fixed to the spring seat rod with screws. One end of the spring rests on the top of the positioning core block. Movable positioning rings are set at both ends of the hinge plane of the folding cargo tube. The inner hole of the movable positioning ring fits onto the anti-tilt wheel rod under the wheelchair. There is a gap of 0.2 to 0.5 mm in the ring so that it can rotate flexibly. The movable rod on the positioning ring is placed in the 12 mm long x 6 mm wide hole of the folding cargo tube. There is a screw on the movable rod, which is fixed with a nut with an arc-shaped washer. There is a gap of 0.15 to 0.3 mm between the arc-shaped washer and the tube wall of the inner hole of the folding cargo tube. The tube ends of the left and right half of the round tube are capped. Two folding cargo tubes are set side by side. The two left half round tubes are connected into one body by two connecting rods, and the two right half round tubes are connected into one body by two connecting rods, forming a double folding cargo tube, which can carry more and more stable cargo.

2. The folding cargo tube and folding guard tube of the lightweight left-right folding wheelchair according to claim 1, characterized in that, The structure of the folding cargo rail and the folding loading rail are the same in the tubing itself, only the connection parts at both ends are different. The difference in their installation on left and right folding wheelchairs is that the folding loading rail is installed on the anti-tilt wheel bar under the wheelchair, with the hinge located at the bottom of the rail. The loading rail folds upwards. The folding cargo rail has the same structure but the installation position is reversed; it is installed on the backrest bar above the wheelchair, with the hinge located at the top of the rail. The cargo rail folds downwards. The folding cargo rail is characterized by: using stainless steel or aluminum alloy round tubing with an outer diameter of 22-28mm; stainless steel wall thickness of 1.4-1.8mm; and aluminum alloy wall thickness of 2.4-3.2mm. The length of the round tubing is the total width of the two backrest bars when the folding wheelchair is open, plus 2mm. It is cut in half at the center, resulting in a left and right half. The left and right half are aligned and joined together, and a hinge is placed on the joint. The two hinge blades are screwed together. The nail is fixed to the pipe wall on the left and right halves of the round tube. A positioning core block, made of aluminum alloy and 50mm long, is installed inside the left and right halves of the round tube at the joint. The core block has a 40mm length inside the hole in the right half of the round tube and is securely fixed with screws. The extra 10mm can extend into the hole in the left half of the round tube. A spring seat rod is vertically installed inside the left half of the round tube, and the spring is fixed to the spring seat rod with screws. One end of the spring rests below the positioning core block. The folding stop tube is level with the hinge. Movable positioning plates are installed at both ends of the surface. The position of the movable positioning plates is perpendicular to the plane of the hinge at 90 degrees. They are fixed to the inner side of the wheelchair backrest rod with screws passing through the middle hole of the movable positioning plates. The movable positioning pins on the movable positioning plates and the screws on the movable positioning pins are placed in the 12mm long x 6mm wide long hole of the folding baffle tube. Arc-shaped washers are added and nuts are used to fix them firmly. There is a gap of 0.15 to 0.3mm between the arc-shaped washers and the inner wall of the folding baffle tube. The ends of the left half of the round tube and the right half of the round tube are capped with tube caps.

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