Folding wheelchair

Abstract

The folding wheelchair comprises a main support, rear wheels, a frame carrying frame, a front support, front wheels and a linkage rod, the front support and the frame carrying frame are rotatably installed on the front side and the rear side of the main support respectively, the rear wheels are installed at the end, away from the front support, of the main support, and the front wheels are installed at the end, away from the main support, of the front support. The front support is fixedly connected with a front support connecting pipe, one end of the linkage rod is rotatably connected with the back frame, the other end of the linkage rod is rotatably connected with the front support connecting pipe, the linkage rod is fixedly connected with a linkage rod connecting pipe, and the main support is fixedly connected with a main support connecting pipe. A locking device is arranged between the linkage rod connecting pipe and the main support connecting pipe. According to the folding wheelchair, the movable linkage rod connecting pipe can drive the back frame and the front support to rotate in the direction close to the main support at the same time so that the wheelchair can be rapidly folded, the folding efficiency is high, and the use experience of a user is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchairs, in particular to a folding wheelchair. Background Art

[0002] A wheelchair is a chair with wheels that can help replace walking. It is an important mobile tool for the injured, sick, and disabled to recover at home, be transported around, see a doctor, and go out for activities. In order to facilitate transportation and carrying, folding wheelchairs have gradually appeared on the market. A folding wheelchair generally has a main frame, rear wheels, a seat cushion, a backrest, a front frame, and a front wheel. The rear wheel is mounted at the bottom of the main frame, the seat cushion is mounted on the main frame, the backrest is rotatably mounted at one end of the main frame, the front frame is rotatably mounted at the other end of the main frame, and the front wheel is mounted on the front frame. When the wheelchair is in normal use, the various components are in a locked state. When folding is required, the user can rotate the backrest and the front frame relative to the main frame, thereby realizing the folding function of the front and rear structures of the wheelchair. At present, most wheelchairs on the market need to fold the front and rear parts of the wheelchair separately, which is inconvenient to operate and has low folding efficiency, which greatly affects the user experience. Utility Model Content

[0003] The technical problem to be solved by the utility model is that in the prior art, the backrest and the front bracket located at the front and rear sides of the wheelchair need to be folded one after another, which is inconvenient to operate and has low folding efficiency. Based on this, the utility model provides a folding wheelchair that can be folded quickly.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a folding wheelchair, comprising a main frame, rear wheels, a back frame, a front frame, front wheels and a linkage rod, the front frame and the back frame are rotatably mounted on the front and rear sides of the main frame respectively, the rear wheel is mounted on one end of the main frame away from the front frame, the front wheel is mounted on one end of the front frame away from the main frame, a front frame connecting pipe is fixedly connected to the front frame, one end of the linkage rod is rotatably connected to the back frame, the other end of the linkage rod is rotatably connected to the front frame connecting pipe, a linkage rod connecting pipe is fixedly connected to the linkage rod, a main frame connecting pipe is fixedly connected to the main frame, and a locking device is provided between the linkage rod connecting pipe and the main frame connecting pipe.

[0005] Furthermore, the main support includes a left guard plate and a right guard plate, the left guard plate and the right guard plate are symmetrically arranged, the rear wheels have two and are respectively installed on the left guard plate and the right guard plate, seat cushions are fixedly installed on the left guard plate and the right guard plate, and the main support connecting pipe is fixedly connected between the left guard plate and the right guard plate.

[0006] Furthermore, the back frame is an inverted U-shaped structure, the two ends of the back frame are rotatably connected to the left guard plate and the right guard plate respectively, and a back pad is installed on the back frame.

[0007] Furthermore, the left guard plate and the right guard plate are both equipped with motors for driving the rear wheel to rotate, and a mounting frame is fixedly connected to one side between the left guard plate and the right guard plate close to the rear wheel, and a battery for supplying power to the motor is fixedly installed on the mounting frame.

[0008] Furthermore, the folding wheelchair also includes a footrest assembly, which includes a connecting plate, a footrest connecting tube and a foot pedal, the connecting plate is fixedly connected to the front bracket connecting tube, the footrest connecting tube is rotatably connected to the connecting plate, and the foot pedal is fixedly connected to the footrest connecting tube.

[0009] Furthermore, the bottom of the connecting plate is fixedly connected to a limiting plate, and the pedal connecting tube can be placed against the limiting plate.

[0010] Furthermore, the locking structure includes a locking tongue and a locking buckle structure, the locking tongue is fixedly connected to the linkage rod connecting tube, and the locking buckle structure is installed on the main bracket connecting tube.

[0011] Furthermore, the locking structure includes a fixed frame, an operating arc plate, a rotating column and a locking catch. The fixed frame is fixedly connected to the main bracket connecting tube, one end of the operating arc plate is rotatably connected to the fixed frame, and the rotating column is rotatably installed at one end of the operating arc plate close to the fixed frame. The locking catch has a U-shaped structure and is fixedly connected to the rotating column, and the locking catch can be hooked on the lock tongue.

[0012] Furthermore, the lock tongue is in a rectangular block structure, and a lock groove for the lock buckle to hook is provided on a side of the lock tongue away from the rotating column.

[0013] The beneficial effects of the utility model are as follows: in the foldable wheelchair of the utility model, the linkage rod is rotatably connected to the back frame and the front bracket connecting tube on the front bracket. When the user pulls the linkage rod connecting tube toward the rear of the wheelchair, the back frame and the front bracket can be driven to rotate toward the main bracket at the same time, thereby folding the wheelchair for easy transportation and carrying. The folding efficiency is high, which greatly improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a three-dimensional diagram of the folding wheelchair of the utility model (in unfolded state);

[0016] Figure 2 yes Figure 1 A partial enlarged view of the A portion of the folding wheelchair shown;

[0017] Figure 3 yes Figure 1 A perspective view of the foldable wheelchair from another perspective;

[0018] Figure 4 yes Figure 1 A perspective view of the foldable wheelchair from another perspective;

[0019] Figure 5 yes Figure 2 A schematic diagram of the connection structure between the back frame and the linkage rod in the folding wheelchair shown;

[0020] Figure 6 yes Figure 1 A perspective view of another state of the foldable wheelchair shown (folded state).

[0021] In the figure: 1. main bracket, 11. main bracket connecting tube, 101. left guard plate, 102. right guard plate, 103. reinforcement rod, 104. mounting frame, 105. battery, 2. rear wheel, 21. motor, 3. back frame, 31. back pad, 4. front bracket, 41. front bracket connecting tube, 5. front wheel, 6. linkage rod, 61. linkage rod connecting tube, 7. locking device, 71. locking tongue, 72. locking structure, 721. fixing frame, 722. operating arc plate, 723. rotating column, 724. locking, 8. cushion, 9. pedal assembly, 91. connecting plate, 911. limiting plate, 92. pedal connecting tube, 93. pedal. DETAILED DESCRIPTION

[0022] Now the utility model is described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the components related to the utility model.

[0023] See also Figure 1-Figure 6 The utility model provides a folding wheelchair, comprising a main frame 1, a rear wheel 2, a back frame 3, a front frame 4, a front wheel 5 and a linkage rod 6. The front frame 4 and the back frame 3 are rotatably mounted on the front and rear sides of the main frame 1 respectively, the rear wheel 2 is mounted on the end of the main frame 1 away from the front frame 4, the front wheel 5 is mounted on the end of the front frame 4 away from the main frame 1, a front frame connecting pipe 41 is fixedly connected to the front frame 4, one end of the linkage rod 6 is rotatably connected to the back frame 3, the other end of the linkage rod 6 is rotatably connected to the front frame connecting pipe 41, a linkage rod connecting pipe 61 is fixedly connected to the linkage rod 6, a main frame connecting pipe 11 is fixedly connected to the main frame 1, and a locking device 7 is provided between the linkage rod connecting pipe 61 and the main frame connecting pipe 11.

[0024] The folding wheelchair of the utility model has a locking device 7 with a locking state and an unlocking state. When the locking device 7 is in the locking state, the linkage rod connecting tube 61 is close to the main support connecting tube 11 and fixed relative to the main support connecting tube 11, and the two cannot move relative to each other. At this time, the back frame 3 and the front frame 4 are in the unfolded state, and the folding wheelchair can be used by the user to sit and push. When the locking device 7 is in the unlocking state, the linkage rod connecting tube 61 can move relative to the main support connecting tube 11. Specifically, the user pulls the linkage rod connecting tube 61 to the rear of the wheelchair, thereby driving the linkage rod 6 to move backward. Since the linkage rod 6 is rotatably connected to the back frame 3 and the front support connecting tube 41 on the front support 4, when the linkage rod 6 moves backward, it can simultaneously drive the back frame 3 and the front support 4 to rotate in the direction close to the main support 1, so that the wheelchair is folded up for easy transportation and carrying. In the above folding process, the movable linkage rod 6 can simultaneously drive the back frame 3 and the front support 4 to rotate, and can quickly adjust the opening and folding states of the wheelchair, with high operating efficiency, which greatly improves the user's experience.

[0025] See also Figure 4 The main support 1 includes a symmetrically arranged left guard plate 101 and a right guard plate 102. There are two rear wheels 2, one of which is mounted on the left guard plate 101, and the other is mounted on the right guard plate 102. The seat cushion 8 is fixedly mounted on the left guard plate 101 and the right guard plate 102. The main support connecting pipe 11 is fixedly connected between the left guard plate 101 and the right guard plate 102. The seat cushion 8 is detachably fixedly connected to the main support 1. When in use, the user can install and remove the seat cushion 8 according to the needs of use and storage. In addition, a plurality of reinforcing rods 103 are fixedly connected between the left guard plate 101 and the right guard plate 102 to strengthen the connection stability between the left guard plate 101 and the right guard plate 102 and improve the structural strength of the main support 1.

[0026] The back frame 3 is generally in an inverted U-shaped structure, and the two ends of the back frame 3 are rotatably connected to the left guard plate 101 and the right guard plate 102 respectively. A back cushion 31 is installed on the back frame 3 to support the user's back.

[0027] There are two front brackets 4, which are respectively connected to the left guard plate 101 and the right guard plate 102. There are two linkage rods 6, which are parallel to each other. The linkage rod connecting tube 61 is fixedly connected between the two linkage rods 6, which enhances the structural strength of the linkage rod 6 and ensures the working stability of the linkage rod 6.

[0028] Please refer again Figure 1In this embodiment, a motor 21 for driving the rear wheel 2 to rotate is installed on both the left guard plate 101 and the right guard plate 102. A mounting frame 104 is fixedly connected to one side between the left guard plate 101 and the right guard plate 102 near the rear wheel 2. A battery 105 for supplying power to the motor 21 is fixedly installed on the mounting frame 104. When in use, the battery 105 supplies power to the motor 21, thereby driving the rear wheel 2 to rotate, so as to realize the wheelchair to move. The motor 21 is a forward and reverse motor to realize the forward and backward functions of the wheelchair.

[0029] The folding wheelchair of the utility model further comprises a pedal assembly 9, which comprises a connecting plate 91, a pedal connecting pipe 92 and a footrest 93. The connecting plate 91 is fixedly connected to the front bracket connecting pipe 41, the pedal connecting pipe 92 is rotatably connected to the connecting plate 91, and the footrest 93 is fixedly connected to the pedal connecting pipe 92. When the wheelchair is in a folded state, the user can further rotate the pedal connecting pipe 92 relative to the connecting plate 91, so as to fold the pedal 92, thereby reducing the overall size of the wheelchair. Furthermore, the bottom of the connecting plate 91 is fixedly connected to a limiting plate 911, and the pedal connecting pipe 92 can be placed on the limiting plate 911. When the wheelchair is pushed and used normally, the pedal 93 naturally falls under the action of its own gravity, and the pedal connecting pipe 92 is placed on the limiting plate 911, thereby realizing the support and limiting function of the pedal 93. When the footrest 93 is folded, the pedal connecting pipe 92 flips upward and then separates from the limiting plate 911.

[0030] The locking device 7 includes a locking tongue 71 and a locking buckle structure 72. The locking tongue 71 is fixedly connected to the linkage rod connecting tube 61, and the locking buckle structure 72 is installed on the main bracket connecting tube 11. Specifically, the locking buckle structure 72 includes a fixing frame 721, an operating arc plate 722, a rotating column 723 and a locking buckle 724. The fixing frame 721 is fixedly connected to the main bracket connecting tube 11, one end of the operating arc plate 722 is rotatably connected to the fixing frame 721, the rotating column 723 is rotatably installed at one end of the operating arc plate 722 close to the fixing frame 721, the locking buckle 724 is U-shaped and fixedly connected to the rotating column 723, and the locking buckle 724 can be hooked on the locking tongue 71.

[0031] When the wheelchair is adjusted from the folded state to the unfolded state, the lock tongue 71 and the lock buckle structure 72 approach each other, and the arc plate 722 is used to rotate the operation, driving the rotating column 723 to move in the direction close to the lock tongue 71. At this time, the user can put the lock buckle 724 of the U-shaped structure on the lock tongue 71. Then, the user rotates the arc plate 722 in the opposite direction to drive the rotating column 723 to move away from the lock tongue 71. During the movement of the rotating column 723, the lock buckle 724 will be driven to move, and finally tightly hooked on the lock tongue 71. When unlocking is required, the arc plate 722 is rotated in the opposite direction to make the rotating column 723 gradually approach the lock tongue 71. At this time, the user can rotate the rotating column 723 to disengage the lock buckle 724 from the lock tongue 71, thereby realizing the unlocking function. After unlocking, the user can fold the wheelchair through the movable linkage rod connecting tube 61.

[0032] In a specific embodiment, the lock tongue 71 is a rectangular block structure, and a lock groove (not shown) is provided on the side of the lock tongue 71 away from the rotating column 723, and the lock groove is used for the lock buckle 724 to hook. In addition, the operating arc plate 722 is rotatably connected to the fixed shaft on the fixed frame 721. In a specific implementation, there is a large damping effect between the operating arc plate 722 and the fixed shaft. The user can only rotate the operating arc plate 722 when a sufficiently large force is applied. In this way, the operating arc plate 722 and the fixed frame 721 are prevented from moving easily, thereby affecting the locking reliability between the lock buckle 724 and the lock tongue 71. Of course, in other embodiments, the operating arc plate 722 and the fixed shaft can also be set to be loosely matched. After the lock buckle 724 and the lock tongue 71 are locked, the user can use a latch to lock the operating arc plate 722 on the linkage rod connecting tube 61, which can also ensure the reliable locking between the lock buckle 724 and the lock tongue 71. Of course, the locking structure may also be a fastener such as a bolt. When locking, the linkage rod connecting tube 61 and the main bracket connecting tube 11 can be fixedly connected directly through the fastener.

[0033] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the scope of the utility model through the above description. The technical scope of this utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A folding wheelchair, characterized in that: The invention comprises a main support, a rear wheel, a back frame, a front support, a front wheel and a linkage rod, wherein the front support and the back frame are rotatably mounted on the front and rear sides of the main support respectively, the rear wheel is mounted on one end of the main support away from the front support, and the front wheel is mounted on one end of the front support away from the main support, a front support connecting tube is fixedly connected to the front support, one end of the linkage rod is rotatably connected to the back frame, and the other end of the linkage rod is rotatably connected to the front support connecting tube, a linkage rod connecting tube is fixedly connected to the linkage rod, a main support connecting tube is fixedly connected to the main support, and a locking device is arranged between the linkage rod connecting tube and the main support connecting tube.

2. The folding wheelchair according to claim 1, characterized in that: The main support includes a left guard plate and a right guard plate, the left guard plate and the right guard plate are symmetrically arranged, the rear wheels have two and are respectively mounted on the left guard plate and the right guard plate, seat cushions are fixedly mounted on the left guard plate and the right guard plate, and the main support connecting pipe is fixedly connected between the left guard plate and the right guard plate.

3. The folding wheelchair according to claim 2, characterized in that: The back frame is in an inverted U-shaped structure, the two ends of the back frame are rotatably connected to the left guard plate and the right guard plate respectively, and a back pad is installed on the back frame.

4. The folding wheelchair according to claim 2, characterized in that: The left guard plate and the right guard plate are both equipped with motors for driving the rear wheel to rotate, and a mounting frame is fixedly connected to one side between the left guard plate and the right guard plate close to the rear wheel, and a battery for supplying power to the motor is fixedly installed on the mounting frame.

5. The folding wheelchair according to claim 1, characterized in that: The folding wheelchair also includes a footrest assembly, which includes a connecting plate, a footrest connecting pipe and a foot pedal, wherein the connecting plate is fixedly connected to the front bracket connecting pipe, the footrest connecting pipe is rotatably connected to the connecting plate, and the foot pedal is fixedly connected to the footrest connecting pipe.

6. The folding wheelchair according to claim 5, characterized in that: The bottom of the connecting plate is fixedly connected to a limiting plate, and the pedal connecting pipe can be placed against the limiting plate.

7. The foldable wheelchair according to claim 1, characterized in that: The locking device comprises a locking tongue and a locking buckle structure, wherein the locking tongue is fixedly connected to the linkage rod connecting tube, and the locking buckle structure is installed on the main bracket connecting tube.

8. The folding wheelchair according to claim 7, characterized in that: The lock structure includes a fixed frame, an operating arc plate, a rotating column and a lock. The fixed frame is fixedly connected to the main bracket connecting tube, one end of the operating arc plate is rotatably connected to the fixed frame, and the rotating column is rotatably installed on one end of the operating arc plate close to the fixed frame. The lock is U-shaped and fixedly connected to the rotating column. The lock can be hooked on the lock tongue.

9. The folding wheelchair according to claim 8, characterized in that: The lock tongue is in a rectangular block structure, and a lock groove for the lock buckle to be hooked is provided on a side of the lock tongue away from the rotating column.

Images