WO2024011972A1

WO2024011972A1 - Standing wheelchair

Info

Publication number: WO2024011972A1
Application number: PCT/CN2023/087468
Authority: WO
Inventors: 胡捍东; 李家荣; 王建文
Original assignee: 佛山市顺康达医疗科技有限公司
Priority date: 2022-07-14
Filing date: 2023-04-11
Publication date: 2024-01-18
Also published as: CN115192325A

Abstract

A standing wheelchair, comprising a chassis frame (1), a shank frame (2), a seat plate (3), a backrest plate (4), armrest pipes (5), and an electric push rod (6). A fixed end of the electric push rod (6) is fixed to the back of the shank frame (2), and an extension end of the electric push rod (6) is hingedly connected to the bottom of the rear end of the seat plate (3), so that the linkage of the shank frame (2), the seat plate (3), and the backrest plate (4) is driven by means of extension and retraction controls of the electric push rod (6), so as to adjust the attitude of the wheelchair. The operation is convenient, and the wheelchair can freely move even after being switched into a standing state, so that great convenience is brought to a user. The radius of rotation of the wheelchair can be reduced by arranging power wheels in the middle, so that the wheelchair can rotate and turn around in place, and the user can conveniently control the wheelchair in a narrow space.

Description

A standing wheelchair

Technical field

The invention relates to the technical field of medical devices, and in particular to a standing wheelchair.

Background technique

Wheelchairs are one of the main travel tools for disabled people, the elderly, people with limited mobility of legs and feet, and people with paralysis. Traditional wheelchairs can only be used in a sitting position, and sitting for long periods of time will bring many problems to users: 1. Causes of damage around the anal canal Stagnation of venous blood flow leads to hemorrhoids. Second, it increases the burden on the patient's waist and causes complications such as lumbar disc herniation. Third, it causes risks such as decreased blood circulation in the human body and venous embolism.

In order to solve the shortcomings of traditional wheelchairs, the introduction of wheelchairs with standing functions is a very important research direction. Currently, there are an increasing number of wheelchairs with standing functions on the market, both manual and electric controlled. However, they also have the following problems: For example, they can only achieve fixed-point adjustment in two postures: standing and sitting, and they can only be in a fixed state after standing. Moving and walking makes it difficult for users to achieve freedom of movement on the site.

Contents of the invention

In view of the above technical problems, the present invention provides a standing wheelchair, which can realize switching between sitting and standing postures by controlling multi-links through a single axis, and can also move and walk freely in the standing posture, making it convenient for the user to adjust walking.

In order to solve the above technical problems, one technical solution adopted by the present invention is to provide a standing wheelchair. The standing wheelchair includes a chassis frame, a calf frame, a seat plate, a backrest plate, an armrest tube and an electric push rod. The chassis Universal wheels are installed on the bottom of the frame in four directions. U-shaped support arms are provided at the front and rear of the bottom of the seat plate. The bottom end of the U-shaped support arm is in contact with the chassis frame. Both sides of the U-shaped support arm are The ends are respectively fixed to the bottom of the seat plate, wherein the top ends of the calf frames are respectively hinged to the front ends of the armrest tubes, and the rear ends of the armrest tubes are hinged to the backrest panels. On both sides, the front end of the seat plate is hinged to the calf frame respectively, the rear end of the seat plate is hinged to the bottom end of the backrest plate, the top end of the backrest plate is hinged to an armrest frame, and the bottom of the seat plate is also provided with A linkage rod, the front end of the linkage rod is hinged to the first hanging ear, the other end of the first hanging ear is abutted against the bottom of the calf frame, the rear end of the linkage rod is hinged to the second hanging ear, and the second hanging ear is connected to another linkage rod. One end is in contact with the back of the bottom end of the backrest plate, the fixed end of the electric push rod is fixed on the back of the calf frame, the extended end of the electric push rod is hinged at the bottom of the rear end of the seat plate, and the bottom of the calf frame Locking pieces are also provided on both sides of the end. There are hanging holes on the locking pieces. A hook is provided inside the locking piece. The solenoid valve controls the hook to cooperate with the hanging hole to achieve locking.

Wherein, the standing wheelchair also includes an anti-slip rod. The tail of the anti-slip rod extends in its vertical direction to form two rotating connecting pieces. The bottom end of the rotating connecting piece is connected to one end of the gas spring through a rotating shaft, and the other end is screwed At the bottom of the seat plate, the other end of the gas spring is screwed to the tail of the seat plate.

Among them, auxiliary reinforcing rods are also provided on both sides of the seat plate. The bottom ends of the auxiliary reinforcing rods are connected to the front and middle sides of the seat plate respectively. The top ends of the auxiliary reinforcing rods intersect and extend, and are connected with the The top of the lower leg frame is hinged to the hinge point at the front end of the armrest tube.

Wherein, the standing wheelchair further includes a footrest, the tail of the footrest extends backward and is connected to the front and rear of the bottom of the chassis frame respectively.

Wherein, the tail portion of the chassis frame extends vertically upward to form two support rods respectively, and the tops of the two support rods are respectively fixed through rotating shafts and hooks in the middle of the back of the backrest board.

Among them, a connecting rod is provided between the front and rear U-shaped support arms, and gas springs are provided on both sides of the bottom of the seat plate. One end of the gas spring is rotatably connected to the connecting rod near the rear U-shaped support arm. One end and the other end of the gas spring are rotatably connected to the back of the calf frame.

Wherein, the standing wheelchair further includes a telescopic headrest, which is arranged on the back of the top of the backrest board and telescopes up and down relative to the backrest board.

Wherein, a gas spring is also provided on the back of the telescopic headrest. One end of the gas spring is rotatably connected to the back of the backrest plate, and the other end is fixed to the back of the telescopic headrest.

Wherein, a leg bracket is also provided at the bottom of the calf frame, and a gas spring is disposed on the back of the leg bracket. One end of the gas spring is hinged on the back of the bottom of the leg bracket, and the other end of the gas spring is hinged on the back of the calf frame.

Among them, electric power wheels are also provided on both sides of the middle part of the chassis frame, and the universal wheels are Mecanum wheels.

The beneficial effects of the present invention are: different from the prior art, embodiments of the present invention provide a standing wheelchair, which includes a chassis frame, a calf frame, a seat plate, a backrest plate, an armrest tube, and an electric push rod. The telescopic control of the electric actuator drives the linkage of the calf frame, seat plate, back plate and armrest tube to realize the posture adjustment of the wheelchair, which is convenient for operation. The wheelchair can move and walk at will even after changing the standing position, which greatly facilitates the user.

Description of drawings

Figure 1 is a first structural schematic diagram of a standing wheelchair in a standing state according to an embodiment of the present invention;

Figure 2 is a second structural schematic diagram of the standing wheelchair provided by the embodiment of the present invention in a standing state;

Figure 3 is a third structural schematic diagram of the standing wheelchair provided by the embodiment of the present invention in a standing state;

Figure 4 is a schematic diagram of the exploded structure of the standing wheelchair in the standing position provided by the embodiment of the present invention;

Figure 5 is a first structural schematic diagram of a standing wheelchair in a sitting position according to an embodiment of the present invention;

Figure 6 is a second structural schematic diagram of the sitting posture of the standing wheelchair provided by the embodiment of the present invention;

Figure 7 is a first structural schematic diagram of the standing wheelchair provided by the embodiment of the present invention in a lying state;

Figure 8 is a second structural schematic diagram of the standing wheelchair provided by the embodiment of the present invention in a lying state;

Figure 9 is a first structural schematic diagram of the standing wheelchair provided by the embodiment of the present invention in a lying position;

Figure 10 is a second structural schematic diagram of the standing wheelchair provided by the embodiment of the present invention in a lying position;

Figure 11 is a first structural schematic diagram of a standing wheelchair in a reclining state according to an embodiment of the present invention;

Figure 12 is a second structural representation of the standing wheelchair in the reclining state provided by the embodiment of the present invention;

Figure 13 is an enlarged structural schematic diagram of part A in Figure 1;

FIG. 14 is an enlarged structural schematic diagram of part B in FIG. 4 .

Description of the numbers in the figure: 1. Chassis frame; 2. Calf frame; 3. Seat plate; 4. Backrest plate; 5. Armrest tube; 6. Electric push rod; 7. Universal wheel; 8. U-shaped support arm; 9 , armrest frame; 10. linkage rod; 11. first hanging ear; 12. second hanging ear; 13. locking piece; 14. hanging hole; 15. hook; 16. anti-slip rod; 17. rotating connecting piece; 18. Gas spring; 19. Auxiliary reinforcing rod; 20. Footrest; 21. Support rod; 22. Rotating shaft; 23. Hanging buckle; 24. Connecting rod; 25. Telescopic headrest; 26. Leg bracket; 27. Electric power wheel.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough understanding of the disclosure of the invention will be provided.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the invention belongs. The terminology used herein in the description of the invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to Figures 1 to 14. As shown in the figures, the embodiment of the present invention provides a standing wheelchair. Its overall structure includes a chassis frame 1, a calf frame 2, a seat plate 3, a back plate 4, an armrest tube 5 and an electric pusher. Rod 6, universal wheels 7 are installed on the bottom of the chassis frame 1 in four directions, U-shaped support arms 8 are provided at the front and rear of the bottom of the seat plate 3, the bottom end of the U-shaped support arm 8 is in contact with the chassis frame 1, the U-shaped support arm The two ends of 8 are respectively fixed to the bottom of the seat plate 3, wherein the top end of the calf frame 2 is hinged to the front end of the armrest tube 5 respectively, the rear end of the armrest tube 5 is hinged to both sides of the backrest plate 4, and the front end of the seat plate 3 is hinged to the calf frame 2 respectively. , the rear end of the seat plate 3 is hinged with the bottom end of the backrest plate 4, the top end of the backrest plate 4 is hinged with an armrest frame 9, the bottom of the seat plate 3 is also provided with a linkage rod 10, the front end of the linkage rod 10 is hinged to the first hanging ear 11, and the first hanging ear The other end of 11 is in contact with the bottom of the calf frame 2. The rear end of the linkage rod 10 is hinged to the second hanging ear 12. The other end of the second hanging ear 12 is in contact with the back of the bottom end of the backrest board 4. The fixed end of the electric push rod 6 is fixed to the calf frame. 2 back, the extended end of the electric push rod 6 is hinged at the bottom of the rear end of the seat plate 3, and locking pieces 13 are also provided on both sides of the bottom end of the calf frame 2. The locking piece 13 has a hanging hole 14, and the locking piece 13 is provided with a The hook 15 is controlled by a solenoid valve to cooperate with the hanging hole 14 to achieve locking.

The standing wheelchair of the present invention consists of an armrest tube, a calf frame, a seat plate and a backrest plate forming a linkage quadrilateral. The expansion and contraction of the electric push rod drives the linkage quadrilateral to linkage, so that the standing wheelchair can be made to stand. The upright wheelchair converts from a sitting position to a standing position. The armrest frame is hinged on the backrest board, so that when the wheelchair changes to a standing position, the armrest frame can be lowered around the backrest board, so that the user can use the armrest frame to assist in standing when standing.

There are various wheelchairs with standing functions on the market. When most wheelchairs are adjusted to a standing position, in order to prevent the human body from sliding down, a fixed baffle is set at the front of the knees, so that the baffle restricts the knees from bending forward and passes through the knees. To support the standing posture of the entire human body, this method will not be used by people with disabilities below the knee and people with calf injuries. Secondly, large forces on the knees for a long time may easily cause knee injuries to the elderly and osteoporosis patients.

Therefore, in a possible implementation of the standing wheelchair of the present invention, the standing wheelchair also includes an anti-slip rod 16. The tail of the anti-slip rod 16 extends in its vertical direction to form two rotating connecting pieces 17. The bottom of the rotating connecting piece 17 is One end of the gas spring 18 is connected through a rotating shaft, the other end is screwed to the bottom of the seat plate 3, and the other end of the gas spring is screwed to the rear of the seat plate 3.

Since the anti-slip rod is connected to one end of the gas spring through the rotating connecting piece through the rotating shaft, the anti-slip rod can be rotated around the gas spring, so that when the standing wheelchair is converted from a sitting position to a standing position, the anti-slip rod can be moved from the seat plate Bottom turns out. And due to the setting of the gas spring, when necessary, the gas spring expands and contracts to realize the up and down height adjustment of the anti-slip rod, making it convenient for users of different heights. Through the setting of the anti-slip rod, the standing wheelchair can be held into the user's crotch through the anti-slip rod when changing to a standing posture. The height of the anti-slip rod is adjustable, allowing the user to stand in a horse-riding manner and avoid lower limbs. Problems such as stress injuries and discomfort caused by standing for long periods of time appear.

Among them, the hook and the solenoid valve are connected by a spring. The solenoid valve controls the retraction of the hook so that the hook is separated from the hanging hole on the locking piece, and the calf frame is released from the locking state. In this state, the electric push rod is connected to one end of the calf frame. Extend, and the end connected to the backrest board retracts to drive the linkage rod to move, which further drives the calf frame to unfold upward, and the backrest plate to unfold downward, gradually flattening the calf frame, seat plate and backrest plate into a horizontal line, forming a lying state. (See Figure 7-8 for details).

Of course, during the transition from a sitting position to a lying-down state, since the electric actuator can be stopped at any time under electric control, during the transition process, the electric actuator can also be kept in the lying position to stop the elongation of the actuator and form a lying position ( For example, as shown in Figure 9-Figure 10).

In addition, when in the sitting position, keep the calf frame in a locked state and control it unilaterally. The retraction of the electric push rod drives the backrest plate to unfold downward, and the end connected to the calf frame remains stationary, so that the calf frame always maintains the sitting position with the calf frame downward. When the backrest plate expands to a certain extent, the electric push rod is controlled to stop retracting. , thereby keeping the wheelchair in a reclining state (see Figure 11-Figure 12).

In one possible implementation, auxiliary reinforcing rods 19 are also provided on both sides of the seat plate 3. The bottom ends of the auxiliary reinforcing rods 19 are respectively connected to the front and middle sides of the seat plate 3. The top ends of the auxiliary reinforcing rods 19 intersect and then extend. , and is hinged with the top end of the calf frame 2 and the front end hinge point of the armrest tube 5.

Through the setting of auxiliary reinforcing rods, the stability of the overall frame of the wheelchair can be further ensured in different postures, making it safer to use.

In a possible implementation manner, the standing wheelchair further includes a foot frame 20, the tail portion of the foot frame 20 extends backward and is connected to the front and rear bottom of the chassis frame 1 respectively.

The setting of the footrest is convenient for users to place their feet when sitting, or to use the footrest position when standing to facilitate walking. The pedal frame extends backward and is connected to the front and rear bottom of the chassis frame respectively, thereby forming a quadrilateral fixed structure with the chassis frame to stabilize the overall frame.

In one possible implementation, the tail portion of the chassis frame 1 extends vertically upward to form two support rods 21 respectively. The tops of the two support rods 21 are respectively fixed through rotating shafts 22 and hooks 23 in the middle of the back of the backrest plate 4 .

The support rod is fixed by the rotating shaft and the hook, so that when the standing wheelchair is in the standing state, the backrest plate can be detached from the support bar and rotated upward together with the calf frame, seat plate, etc. around the hinge point as a whole to become a standing state. When the standing wheelchair is converted into a sitting position or other postures that require support for the backrest board, it further provides support for the backrest board, making the overall wheelchair more stable in different states.

In one possible implementation, a connecting rod 24 is provided between the front and rear U-shaped support arms 8, and gas springs 18 are provided on both sides of the bottom of the seat plate 3. One end of the gas spring 18 is rotatably connected to the connecting rod 24 near the rear. One end of the U-shaped support arm and the other end of the gas spring 18 are rotationally connected to the back of the calf frame 2.

By disposing gas springs 18 on both sides of the bottom of the seat plate, when the standing wheelchair is converted from a sitting position to a standing position, or when the wheelchair is lying flat, the gas springs can be pushed to the top to support the parallelism of the seat plate.

In a possible implementation, the standing wheelchair further includes a telescopic headrest 25 , which is disposed on the top back of the backrest plate 4 and telescopes up and down relative to the backrest plate 4 .

In one possible implementation, a gas spring 18 is also provided on the back of the telescopic headrest. One end of the gas spring 18 is rotatably connected to the back of the backrest plate 4 and the other end is fixed to the back of the telescopic headrest 25 .

Through the setting of the telescopic headrest, it is convenient for the user to rest his head, and the telescopic headrest can be telescopic, so that the height of the headrest can be adjusted. It should be noted that the specific telescopic structure of the telescopic headrest can be any structure in the prior art that can achieve the telescopic effect, such as marble telescopic pipes, etc. As a more preferred solution, the present invention provides a gas spring on the back of the telescopic headrest, and the arrangement of the gas spring can facilitate further stepless adjustment of the telescopic headrest. In other words, the telescopic headrest can be adjusted to any height.

In a possible implementation, a leg bracket 26 is also provided at the bottom of the calf frame 2, and a gas spring 18 is disposed on the back of the leg bracket 26. One end of the gas spring 18 is hinged to the back of the bottom of the leg bracket 26, and the other end is hinged to the calf. Rack 2 back.

Through the setting of the leg bracket, the leg bracket can be telescopic relative to the calf frame, so that when the wheelchair is unfolded into a lying state, it can be extended to drag the legs. Of course, as another possible implementation, the joint effect of the calf frame and the leg bracket of the present invention can be simultaneously realized directly through an integrated retractable leg frame. Without changing the design purpose of the present invention, other possible modifications can also be used in the present invention, and the present invention is not further limited.

In a possible implementation manner, electric power wheels are also provided on both sides of the middle part of the chassis frame, and the universal wheels are Mecanum wheels.

In the standing wheelchair of the present invention, the four front and rear universal wheels are Mecanum wheels. The Mecanum wheels can move laterally, and the electric power wheels are arranged in the middle of the vehicle chassis frame. The electric power wheels have a small turning radius and can almost move in place. Turning in circles, and the front and rear turning output power of the standing wheelchair mainly relies on the electric power wheels, and the four front and rear Mecanum wheels can be realized through the left and right speed difference of the electric power wheels in the wheel structure when the wheels are not turning left and right. Walk left and right.

From the above detailed description of the present invention in conjunction with the accompanying drawings, it can be understood that the standing wheelchair of the present invention includes a chassis frame, a calf frame, a seat plate, a backrest plate, an armrest tube, and an electric push rod. There are U-shaped support arms at the front and rear of the bottom of the seat plate. The bottom end of the U-shaped support arm is in contact with the chassis frame. The two ends of the U-shaped support arm are fixed to the bottom of the seat plate. The top of the calf frame is hinged to the front end of the armrest tube. The rear end of the armrest tube is hinged on both sides of the backrest board, the front end of the seat board is hinged on the calf frame respectively, the rear end of the seat board is hinged to the bottom end of the backrest board, the top of the backrest board is hinged with the armrest frame, and the bottom of the seat board The front end of the linkage rod is hinged to the first hanging ear, the other end of the first hanging ear is abutted on the bottom of the calf frame, the rear end of the linkage rod is hinged to the second hanging ear, and the other end of the second hanging ear is abutted on the backrest board On the back of the bottom end, the fixed end of the electric push rod is fixed on the back of the calf frame. The extended end of the electric push rod is hinged at the bottom of the rear end of the seat plate. There are also locking pieces on both sides of the bottom end of the calf frame. There are hanging holes on the locking pieces, which can be locked There is a hook inside the piece, and the solenoid valve controls the hook to cooperate with the hanging hole to achieve locking. The design of the standing wheelchair of the present invention uses the telescopic control of the electric actuator to drive the linkage of the calf frame, seat plate, and backrest plate to realize the posture adjustment of the wheelchair. It can achieve standing, sitting, lying down, lying down, and reclining positions respectively. A wheelchair is multi-purpose and easy to operate, making it convenient for users to operate. Even after the wheelchair is converted into a standing position, it can move and walk at will, which is very convenient for users.

In addition, the wheelchair of the present invention is also provided with an anti-slip rod, which is driven by a linkage extension type to extend the anti-slip rod when standing. The anti-slip rod drags the human body's crotch in a saddle-like manner, allowing the user to ride a horse. Stand to avoid force injuries to the user's lower limbs and discomfort caused by standing for long periods of time. Moreover, the height of the anti-slip bar is adjustable, which can adapt to the use needs of different heights.

The above are only examples of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied to other related technologies fields are equally included in the scope of patent protection of the present invention.

Claims

A standing wheelchair, characterized in that the standing wheelchair includes a chassis frame, a calf frame, a seat plate, a backrest plate, an armrest tube and an electric push rod, and universal wheels are installed in four directions at the bottom of the chassis frame. U-shaped support arms are provided at the front and rear of the bottom of the seat plate. The bottom end of the U-shaped support arm is in contact with the chassis frame. The two ends of the U-shaped support arm are respectively fixed to the bottom of the seat plate, wherein, The top end of the calf frame is hinged to the front end of the armrest tube, the rear end of the armrest tube is hinged to both sides of the backrest plate, the front end of the seat plate is hinged to the calf frame respectively, and the rear end of the seat plate is hinged to the calf frame. The bottom end of the backrest plate is hinged, and the top end of the backrest plate is hinged to an armrest frame. The bottom of the seat plate is also provided with a linkage rod. The front end of the linkage rod is hinged to the first hanging ear, and the other end of the first hanging ear is in contact with At the bottom of the calf frame, the rear end of the linkage rod is hinged to a second hanging ear, the other end of the second hanging ear is in contact with the back of the bottom end of the backrest board, and the fixed end of the electric push rod is fixed to the calf On the back of the frame, the extended end of the electric push rod is hinged at the bottom of the rear end of the seat plate. Locking pieces are also provided on both sides of the bottom end of the calf frame. There are hanging holes on the locking pieces. The locking pieces A hook is provided inside, and the solenoid valve is used to control the hook to cooperate with the hanging hole to achieve locking.
The standing wheelchair according to claim 1, characterized in that the standing wheelchair further includes an anti-slip rod, the tail of the anti-slip rod extends in its vertical direction to form two rotating connecting pieces, and the bottom of the rotating connecting piece One end of the gas spring is connected through a rotating shaft, the other end is screwed to the bottom of the seat plate, and the other end of the gas spring is screwed to the tail of the seat plate.
The standing wheelchair according to claim 1, characterized in that auxiliary reinforcing rods are provided on both sides of the seat plate, and the bottom ends of the auxiliary reinforcing rods are respectively connected to the front side and the middle side of the seat plate. The top end of the auxiliary reinforcing rod intersects and extends, and is hinged with the hinge point of the top end of the calf frame and the front end of the armrest tube.
The standing wheelchair according to claim 1, characterized in that the standing wheelchair further includes a footrest, the tail of the footrest extends backward and is connected to the front and rear of the bottom of the chassis frame respectively.
The standing wheelchair according to claim 1, characterized in that the tail portion of the chassis frame extends vertically upward to form two support rods, and the tops of the two support rods are rotated respectively. The shaft is matched and fixed with the hook in the middle part of the back of the backrest board.
The standing wheelchair according to claim 1, characterized in that a connecting rod is provided between the front and rear U-shaped support arms, and gas springs are respectively provided on both sides of the bottom of the seat plate, and one end of the gas spring is rotatably connected. At one end of the connecting rod near the rear U-shaped support arm, the other end of the gas spring is rotatably connected to the back of the calf frame.
The standing wheelchair according to claim 1, characterized in that the standing wheelchair further includes a telescopic headrest, the telescopic headrest is arranged on the back of the top of the backrest board and telescopes up and down relative to the backrest board.
The standing wheelchair according to claim 7, characterized in that the back of the telescopic headrest is further provided with a gas spring, one end of the gas spring is rotatably connected to the back of the backrest board, and the other end is connected to the back of the telescopic headrest. fixed.
The standing wheelchair according to claim 1, wherein a leg bracket is provided at the bottom of the calf frame, a gas spring is provided on the back of the leg bracket, and one end of the gas spring is hinged to the leg bracket. The other end is hinged to the back of the lower leg frame.
The standing wheelchair according to claim 1, characterized in that electric power wheels are also provided on both sides of the middle part of the chassis frame, and the universal wheels are Mecanum wheels.