Portable wheelchair with quick folding function

Abstract

The portable wheelchair with the rapid folding function comprises a cushion pipe, backrest pipes, a folding self-locking mechanism, a frame folding mechanism and armrest folding mechanisms, the backrest pipes are symmetrically, rotationally and fixedly arranged above one side of the cushion pipe, a folding pull rod is rotationally arranged below the inner sides of the backrest pipes, self-locking grooves are formed in the upper portions of the two ends of the folding pull rod, and the folding self-locking mechanism is connected with the frame folding mechanism. Guide pipes are symmetrically and fixedly arranged on one side of the cushion pipe, first hooking holes are formed in the lower portions of the two ends of the folding pull rod, a frame connecting piece is rotationally arranged on the inner side of the lower end of the backrest pipe, second hooking holes are formed in the upper portion of one side of the frame connecting piece, and tension springs are arranged between the first hooking holes and the second hooking holes in a hooking mode. The seat cushion pipe and the backrest pipe are rotatably connected with a frame folding mechanism, and the backrest pipe is rotatably connected with an armrest folding mechanism; when the seat cushion pipe and the backrest pipe rotate and unfold, the guide pipe is driven to rotate synchronously and be clamped into the self-locking groove in the folding pull rod, and meanwhile when unlocking is needed, the folding pull rod is rotated to achieve rapid unlocking.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchair equipment, in particular to a portable wheelchair with a quick folding function. Background Art

[0002] A wheelchair is a wheeled seat that usually provides mobility support for people with limited mobility. It mainly consists of components such as a seat, a backrest, armrests, wheels, brakes, etc. The design of the wheelchair aims to assist those who are unable to walk independently due to physical disabilities, diseases, injuries, or old age and weakness, enabling them to move indoors and outdoors, participate in various daily activities, and improve their quality of life. Among them, a folding wheelchair is a specially designed wheelchair that can be folded through a specific folding structure when not in use to reduce the occupied space and facilitate storage and carrying. The folding mechanism is a key part of the folding wheelchair, generally using ingenious joint and connector designs. Commonly seen are cross-folding types, with a cross structure similar to scissors, which can greatly reduce the volume of the wheelchair after folding; there are also front-back folding types, which achieve compact storage by folding the seat part and the frame front and back. These folding mechanisms are relatively easy to operate, and some wheelchairs can even be folded or unfolded with one key, facilitating the operation of users or caregivers;

[0003] In the utility model with the application number 202322669493.5, a folding wheelchair is disclosed. Since the support link does not need to be hinged to the front support frame, the length of the front support frame can be further reduced. And when folding, the hinge point between the support link and the seat link moves backward, which can further reduce the length of the entire folding wheelchair after folding. Thus, the occupied space of the folded folding wheelchair is relatively small, improving the user experience;

[0004] However, the above folding wheelchair lacks a self-locking function structure between the seat support and the seat link after unfolding, so that the folding wheelchair still needs manual assistance for fixed connection in ways such as bolt fixation after unfolding, making the folding and unfolding steps relatively cumbersome and inconvenient to use. The frame body of the above folding wheelchair lacks a folding function after folding, so that the wheelchair still needs to occupy a large space after folding, affecting the use experience. Therefore, the present utility model proposes a portable wheelchair with a quick folding function to solve the problems existing in the prior art. Summary of the Utility Model

[0005] In view of the above problems, the purpose of the present utility model is to provide a portable wheelchair with a quick folding function. When the seat tube and the backrest tube are rotated and unfolded, the catheter is driven to rotate synchronously and snap into the self-locking groove on the folding pull rod, so as to lock the rotation angle of the seat tube and the backrest tube. At the same time, when unlocking is required, the folding pull rod is rotated to achieve quick unlocking, which is convenient for quick folding and unfolding. When folding and storing, the main frame tube and the frame connecting piece drive the front wheel fixing tube and the battery box fixing tube to rotate synchronously, effectively reducing the occupied space of the wheelchair after folding.

[0006] To achieve the purpose of the present utility model, the present utility model is realized through the following technical solutions: A portable wheelchair with a quick folding function, including a seat tube, a backrest tube, a folding self-locking mechanism, a frame folding mechanism and an armrest folding mechanism. The backrest tube is rotatably fixed on the upper side of one side of the seat tube by a shaft pin. The folding self-locking mechanism includes a folding pull rod, a self-locking groove, a catheter, a first hook hole, a frame connecting piece, a second hook hole and a tension spring. The folding pull rod is rotatably provided on the lower side inside the backrest tube by a shaft pin. Self-locking grooves are provided in a matching manner above both ends of the folding pull rod. The catheter is symmetrically fixed on one side of the seat tube. First hook holes are provided in a matching manner below both ends of the folding pull rod. The frame connecting piece is rotatably provided on the inner side of the lower end of the backrest tube by a shaft pin. A second hook hole is provided above one side of the frame connecting piece. A tension spring is hooked between the first hook hole and the second hook hole. A frame folding mechanism is rotatably connected to the seat tube and the backrest tube. An armrest folding mechanism is rotatably connected to the backrest tube.

[0007] Further improvement lies in: The self-locking groove corresponds to the position of the catheter, and the rotation of the self-locking groove is locked by buckling on the outer side of the catheter.

[0008] Further improvement lies in: The frame folding mechanism includes a front wheel fixing tube, a main frame tube and a battery box fixing tube. The front wheel fixing tube is rotatably connected to the inner side of the lower part of the other side of the seat tube by a shaft pin. The main frame tube is rotatably connected to the outer side of the lower part of the other side of the seat tube by a shaft pin. The lower end of the main frame tube is rotatably connected to the battery box fixing tube by a shaft pin. The upper part of the battery box fixing tube is rotatably connected to the inner side of the backrest tube by a shaft pin.

[0009] Further improvement lies in: The armrest folding mechanism includes an armrest support tube, an armrest adjustment tube, an armrest connecting block and an armrest main body. The armrest support tube is rotatably connected to the outer side of one side of the seat tube by a shaft pin. The armrest adjustment tube is rotatably connected to the outer side above the backrest tube by a shaft pin. An armrest connecting block is hingedly connected between the armrest support tube and the armrest adjustment tube. The armrest main body is fixed on the armrest connecting block.

[0010] A further improvement lies in that: a flange motor is fixedly provided at the lower end of the main frame tube, a flange wheel is drivingly connected to the output end of the flange motor, and a brake member is fixedly provided at the lower end of the main frame tube.

[0011] A further improvement lies in that: universal wheel forks are symmetrically and rotatably provided on both sides of the front wheel fixing tube, a three-pronged wheel is rotatably provided inside the universal wheel fork, pedal tubes are symmetrically and fixedly provided on the front side of the main frame tube, and pedal plates are fixedly provided at the ends of the pedal tubes.

[0012] A further improvement lies in that: a backrest support tube is cooperatively sleeved between the upper ends of the backrest tubes.

[0013] The beneficial effects of the present utility model are as follows: when the seat tube and the backrest tube of the present utility model are rotated and unfolded, the conduit is driven to rotate synchronously and is clamped into the self-locking groove on the folding pull rod, so as to lock the rotation angles of the seat tube and the backrest tube. At the same time, when unlocking is required, the folding pull rod is rotated to achieve quick unlocking, which is convenient for quick folding and unfolding. When folding and storing, the main frame tube and the frame connecting piece drive the front wheel fixing tube and the battery box fixing tube to rotate synchronously, effectively reducing the occupied space of the wheelchair after folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional schematic diagram of the overall frame of the present utility model;

[0015] Figure 2 is a three-dimensional schematic diagram of the overall unfolded state of the present utility model;

[0016] Figure 3 is a three-dimensional schematic diagram of the overall folded state of the present utility model;

[0017] Figure 4 is a three-dimensional schematic diagram of the folding pull rod of the present utility model;

[0018] Figure 5 is a three-dimensional schematic diagram of the seat tube of the present utility model;

[0019] Figure 6 is a three-dimensional schematic diagram of the front wheel fixing tube of the present utility model;

[0020] Figure 7 is a three-dimensional schematic diagram of the main frame tube of the present utility model.

[0021] Wherein: 1. seat tube; 2. backrest tube; 3. folding pull rod; 4. self-locking groove; 5. conduit; 6. first hook hole; 7. frame connecting piece; 8. second hook hole; 9. tension spring; 10. front wheel fixing tube; 11. main frame tube; 12. battery box fixing tube; 13. armrest support tube; 14. armrest adjustment tube; 15. armrest connecting block; 16. armrest body; 17. flange motor; 18. flange wheel; 19. brake component; 20. universal wheel fork; 21. three-pronged wheel; 22. footrest tube; 23. footrest; 24. backrest support tube. Detailed implementation mode

[0022] To deepen the understanding of the present utility model, the following will further elaborate on the present utility model in conjunction with embodiments. These embodiments are only used to explain the present utility model and do not constitute a limitation on the protection scope of the present utility model.

[0023] According to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown, this embodiment provides a portable wheelchair with a quick folding function, including a seat tube 1, a backrest tube 2, a folding self-locking mechanism, a frame folding mechanism, and an armrest folding mechanism. A backrest tube 2 is rotatably fixed on the upper side of one side of the seat tube 1 by a shaft pin. The folding self-locking mechanism includes a folding pull rod 3, a self-locking groove 4, a conduit 5, a first hook hole 6, a frame connecting piece 7, a second hook hole 8, and a tension spring 9. A folding pull rod 3 is rotatably provided at the lower inner side of the backrest tube 2 by a shaft pin. Self-locking grooves 4 are provided in a matching manner above both ends of the folding pull rod 3. Conduits 5 are symmetrically fixed on one side of the seat tube 1. First hook holes 6 are provided in a matching manner below both ends of the folding pull rod 3. A frame connecting piece 7 is rotatably provided at the lower inner side of the lower end of the backrest tube 2 by a shaft pin. A second hook hole 8 is provided above one side of the frame connecting piece 7. A tension spring 9 is hooked between the first hook hole 6 and the second hook hole 8. The self-locking groove 4 corresponds to the position of the conduit 5, and the self-locking groove 4 rotates and is locked by buckling on the outer side of the conduit 5. A frame folding mechanism is rotatably connected to the seat tube 1 and the backrest tube 2, and an armrest folding mechanism is rotatably connected to the backrest tube 2. When the seat tube 1 and the backrest tube 2 rotate relative to each other and unfold, the conduit 5 rotates with the seat tube 1 and is inserted into the self-locking groove 4, so that the angle between the seat tube 1 and the backrest tube 2 is locked. In the locked state, the folding pull rod 3 is pulled downward from one side by the elastic force of the tension spring 9, so that the self-locking groove 4 and the conduit 5 remain in the locked state, preventing mutual folding during the movement of the wheelchair. At the same time, pulling the folding pull rod 3 can achieve quick unlocking, which is convenient for quick folding and storage in different outdoor environments, and solves the problem that the traditional folding wheelchair is fixed by bolts, making the folding and unfolding steps more cumbersome.

[0024] The frame folding mechanism includes a front wheel fixing tube 10, a frame main tube 11 and a battery box fixing tube 12. The front wheel fixing tube 10 is rotatably connected with the inner side axle pin at the lower inner side of the other side of the seat cushion tube 1. The frame main tube 11 is rotatably connected with the outer side axle pin at the lower outer side of the seat cushion tube 1. The battery box fixing tube 12 is rotatably connected with the lower end of the frame main tube 11. The upper part of the battery box fixing tube 12 is rotatably connected with the inner side axle pin of the backrest tube 2. When folding, the seat cushion tube 1 and the backrest tube 2 rotate and fold with the axle pin connection as the center, driving the frame main tube 11 and the battery box fixing tube 12 to rotate and fold synchronously, effectively reducing the storage space after folding.

[0025] The armrest folding mechanism includes an armrest support tube 13, an armrest adjusting tube 14, an armrest connecting block 15 and an armrest main body 16. The armrest support tube 13 is rotatably connected with an outer matching axle pin on one side of the seat cushion tube 1, and the armrest adjusting tube 14 is rotatably connected with an outer matching axle pin above the backrest tube 2. An armrest connecting block 15 is hingedly connected between the armrest support tube 13 and the armrest adjusting tube 14, and an armrest main body 16 is fixed on the armrest connecting block 15. When it is necessary to adjust the armrest angle, loosen the knob on the armrest connecting block 15 and press the armrest adjusting tube 14 to rotate and adjust. After the adjustment is completed, retighten the knob.

[0026] A flange motor 17 is fixedly provided at the lower end of the frame main pipe 11, and a flange wheel 18 is driven and connected at the output end of the flange motor 17. A brake component 19 is fixedly provided at the lower end of the frame main pipe 11. When the wheelchair needs to move, the flange motor 17 drives the flange wheel 18 to rotate and drive the wheelchair to move. Turning is achieved by the speed difference between the two sets of flange motors 17.

[0027] Universal forks 20 are symmetrically rotatable on both sides of the front wheel fixing tube 10, a three-pronged wheel 21 is rotatably arranged inside the universal fork 20, a pedal tube 22 is symmetrically fixed on the front side of the frame main tube 11, and a foot pedal 23 is fixed at the end of the pedal tube 22, so that the user can maintain a more comfortable state when sitting on the wheelchair.

[0028] A backrest support tube 24 is sleeved between the upper ends of the backrest tubes 2 to facilitate the movement of the wheelchair.

[0029] When the portable wheelchair with a quick folding function is unfolded, the seat tube and the backrest tube are pulled in opposite directions to rotate and open, and the guide tube rotates synchronously with the seat tube and is clamped into the self-locking groove on the folding pull rod, and at the same time, the tension spring pulls the folding pull rod through the first hook hole and the second hook hole to lock the seat tube and the backrest tube. When it is necessary to store and fold, the folding pull rod is pulled to rotate to release the buckle lock of the guide tube and the self-locking groove, and then the seat tube and the backrest tube are pushed to rotate towards each other, fold and merge, and at the same time, the frame main tube and the frame connecting plate are driven to rotate and fold to reduce the occupied space. When it is necessary to move, the flange motor drives the flange wheel to rotate, and the foot pedal makes it easier for users to move with their feet off the ground more comfortably.

[0030] The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A portable wheelchair with a quick folding function, characterized in that: It includes a seat tube (1), a backrest tube (2), a folding self-locking mechanism, a frame folding mechanism and an armrest folding mechanism. Above the upper side of one side of the seat tube (1), the backrest tube (2) is rotatably fixed by a symmetry pin. The folding self-locking mechanism includes a retracting pull rod (3), a self-locking groove (4), a conduit (5), a first hook hole (6), a frame connecting piece (7), a second hook hole (8) and a tension spring (9). Below the inner side of the backrest tube (2), the retracting pull rod (3) is rotatably provided by a pin. Above both ends of the retracting pull rod (3), the self-locking grooves (4) are correspondingly provided. On one side of the seat tube (1), the conduits (5) are symmetrically fixed. Below both ends of the retracting pull rod (3), the first hook holes (6) are correspondingly provided. Inside the lower end of the backrest tube (2), the frame connecting piece (7) is rotatably provided by a pin. Above one side of the frame connecting piece (7), the second hook hole (8) is provided. Between the first hook hole (6) and the second hook hole (8), the tension spring (9) is hooked and provided. On the seat tube (1) and the backrest tube (2), the frame folding mechanism is rotatably connected. On the backrest tube (2), the armrest folding mechanism is rotatably connected.

2. The portable wheelchair with a quick folding function according to claim 1, wherein: The self-locking groove (4) corresponds to the position of the conduit (5), and the self-locking groove (4) rotates and is locked by the buckle on the outer side of the conduit (5).

3. A portable wheelchair with a quick folding function according to claim 1, characterized in that: The frame folding mechanism includes a front wheel fixing tube (10), a frame main tube (11) and a battery box fixing tube (12). Below the inner side of the other side of the seat tube (1), the front wheel fixing tube (10) is rotatably connected by a pin. Below the outer side of the other side of the seat tube (1), the frame main tube (11) is rotatably connected by a pin. At the lower end of the frame main tube (11), the battery box fixing tube (12) is rotatably connected by a pin. Above the battery box fixing tube (12), it is rotatably connected to the inner side of the backrest tube (2) by a pin.

4. A portable wheelchair with a quick folding function according to claim 1, characterized in that: The armrest folding mechanism includes an armrest support tube (13), an armrest adjustment tube (14), an armrest connecting block (15) and an armrest main body (16). Outside the outer side of one side of the seat tube (1), the armrest support tube (13) is rotatably connected by a pin. Above the outer side of the backrest tube (2), the armrest adjustment tube (14) is rotatably connected by a pin. Between the armrest support tube (13) and the armrest adjustment tube (14), the armrest connecting block (15) is hingedly connected. On the armrest connecting block (15), the armrest main body (16) is fixed.

5. The portable wheelchair with a quick folding function according to claim 3, characterized in that: At the lower end of the frame main tube (11), a flange motor (17) is fixed. The output end of the flange motor (17) is drivingly connected with a flange wheel (18). At the lower end of the frame main tube (11), a brake part (19) is fixed.

6. The portable wheelchair with a quick folding function according to claim 3, wherein: On both sides of the front wheel fixing tube (10), the universal wheel forks (20) are symmetrically rotatably provided. Inside the universal wheel forks (20), the three-pronged wheels (21) are rotatably provided. On the front side of the frame main tube (11), the footrest tubes (22) are symmetrically fixed. At the end of the footrest tubes (22), the footrest plates (23) are fixed.

7. A portable wheelchair with a quick folding function according to claim 1, characterized in that: Between the upper ends of the backrest tubes (2), the backrest support tube (24) is correspondingly sleeved.

Images