Multifunctional wheelchair

Abstract

The utility model discloses a multifunctional wheelchair which is mainly characterized in that a backrest frame is movably connected with the rear top parts of a left frame and a right frame, and a left air rod, a left lower valve seat, a left valve switch lever piece, a right air rod, a right lower valve seat and a right valve switch lever piece are arranged between the backrest frame and the rear upper parts of the left frame and the right frame; the rear end of the left valve switch lever piece and the rear end of the right valve switch lever piece are jointly connected with a first valve switch steel wire rope assembly, the other end of the first steel wire rope assembly is connected with a first valve switch hand brake, and the first valve switch hand brake is fixedly installed on the left side armrest frame or the right side armrest frame. According to the product, a user can conveniently and smoothly operate overturning adjustment of the backrest frame, a person sitting on a wheelchair can conveniently operate the product by himself / herself, the user can conveniently use the product, and the person can conveniently adjust the backrest frame to lie back to have a rest; the device is simple in structure, small in force, easy to operate, low in manufacturing cost, easy to assemble and produce and high in production efficiency.

Description

Technical Field

[0001] The utility model relates to a wheelchair, in particular to a multifunctional wheelchair. Background Art

[0002] For example 1: The Chinese patent document publication number: CN212997083U discloses an adjustable wheelchair, including a seat cushion. Steering mechanisms are arranged at both the front and rear of the seat cushion. Cross beams are welded to both the front and rear of the seat cushion. Baffles are welded to the surfaces of the cross beams. A bracket is rotatably connected to the left side of the cross beam. A backrest is welded to the surface of the bracket. An armrest is welded to the top of the bracket. A transmission mechanism is arranged at the bottom of the seat cushion. A recycling mechanism is arranged at the front of the baffle. A frame is rotatably connected to the right side of the seat cushion. A support plate is welded to the surface of the frame. A pedal is rotatably connected to the surface of the frame. The utility model provides an adjustable wheelchair. When the user leans back against the backrest, the push rod will push the pull rod to move to the right, the backrest will slowly drop, and the support plate will slowly rise, so that the user can lay the wheelchair flat by himself without bothering others and rest, which greatly facilitates the life of the user.

[0003] The above-mentioned wheelchair is a product of the same type of structure. It installs a push rod on one side of the wheelchair to push the pull rod to move to the right, the backrest will slowly drop, and the support plate will slowly rise, so that the user can lay the wheelchair flat by himself without bothering others and rest. However, this structure is complex, costly, and has low production efficiency, and the inclination angle of the backrest cannot be freely adjusted.

[0004] For example 2: The Chinese patent document publication number: CN220109978U discloses a reclining mechanism for an electric wheelchair, including legs and a base. A first fixing rod is fixedly arranged between the legs. A second fixing rod is rotatably arranged between the legs. First fixing plates are fixedly arranged at both ends of the second fixing rod. A first connecting rod is fixedly arranged at the upper end of the first fixing plate. A second connecting rod is fixedly arranged at the side end of the first connecting rod. A fifth connecting rod is rotatably arranged on the second connecting rod. A sixth connecting rod is fixedly arranged at the lower end of the fifth connecting rod. A second fixing plate fixed to the fifth connecting rod is rotatably arranged at the lower end of the sixth connecting rod. A third connecting rod is rotatably connected to the right end of the second fixing plate. A fourth connecting rod is rotatably arranged at the lower end of the third connecting rod. First jacks and second jacks are arranged on the first fixing plate. A first button is arranged in the first jack.

[0005] The above-mentioned reclining mechanism for an electric wheelchair has a complex structure, high cost, low production efficiency, and the inclination angle of the backrest cannot be freely adjusted.

[0006] Example 3: Chinese Patent Document Publication Number: CN212913602U, which discloses a wheelchair for cardiology nursing, including a support seat. On both the left and right sides of the bottom of the support seat, there are support legs fixedly connected. At the bottom of the support legs, there are universal wheels. On the back of the support legs, there is a connecting rod. On both the left and right sides of the front of the support seat, there are movable rods movably connected. Between the movable rod and the connecting rod, there is a first hydraulic cylinder. At the middle position of the movable rod, there is a leg plate. When the backrest plate moves downward, it drives the movable block to rotate in the "U" - shaped groove, making the movement more stable. When the backrest plate moves downward, it drives the armrest to move downward synchronously through the connecting shaft, improving the comfort and stability when the patient lies back. By setting an anti - slip layer, it can prevent the patient's hand from slipping when touching the armrest. By setting the connecting rod and the rear wheel with an "L" - shaped structure, it plays a supporting role to prevent the patient from tipping over when lying down.

[0007] The above - mentioned backrest plate adjustment structure is not convenient to operate, with complex operation, inconvenient for some elderly people to operate, and unable to freely adjust the inclination angle of the backrest. Utility Model Content

[0008] In order to solve the above - mentioned technical problems, the present utility model provides a multifunctional wheelchair with a reasonable structural design. The first valve switch handbrake is arranged on the armrest frame for convenient operation of the first valve switch handbrake, and the backrest frame can be conveniently adjusted at multiple angles through the first valve switch handbrake.

[0009] The solutions to the above - mentioned technical problems are as follows:

[0010] A multifunctional wheelchair includes a left rear large caster, a left - hand side frame, a left front small caster, a left - hand side armrest frame, a middle X - shaped frame, a right rear large caster, a right - hand side frame, a right front small caster, a right - hand side armrest frame, a backrest frame, a left air rod, and a right air rod. The outside of the rear part of the left - hand side frame is connected with a left rear large caster, the front bottom is connected with a left front small caster, and the top is connected with a left - hand side armrest frame. The outside of the rear part of the right - hand side frame is connected with a right rear large caster, the front bottom is connected with a right front small caster, and the top is connected with a right - hand side armrest frame. Between the left - hand side frame and the right - hand side frame, there is a middle X - shaped frame connected, and the top of the middle X - shaped frame is connected with a seat.

[0011] The left air rod and the right air rod are installed vertically in an inverted manner, and the left air rod and the right air rod jointly support the backrest frame.

[0012] The left - hand side middle - rear section of the backrest frame is movably connected to the top of the cylinder seat of the left air rod. The bottom of the telescopic rod of the left air rod is fixedly connected with a lower left valve seat. The lower left valve seat is movably connected to the upper rear part of the left - hand side frame. At the lower left valve seat, there is a left valve switch lever member movably connected. The inner end of the left valve switch lever member is elastically valve - contact connected to the telescopic rod of the left air rod.

[0013] The top of the barrel seat of the right air rod is movably connected to the middle and rear section on the right side of the backrest frame. The bottom of the telescopic rod of the right air rod is fixedly connected to the lower right valve seat. The lower right valve seat is movably connected to the upper rear part of the right frame. A right valve switch lever is movably connected to the lower right valve seat. The inner end of the right valve switch lever is in elastic valve contact connection with the telescopic rod of the right air rod;

[0014] The rear ends of the left valve switch lever and the right valve switch lever are jointly connected to the first wire rope assembly of the public valve switch. The other end of the first wire rope assembly is connected to a first valve switch handbrake, and the first valve switch handbrake is fixedly installed on the left armrest frame or the right armrest frame.

[0015] The beneficial effects of a multifunctional wheelchair of the present invention are as follows: 1. The first valve switch handbrake is mainly installed on the right armrest frame of this product. The first valve switch handbrake drives the valves of the left air rod and the right air rod through the first wire rope assembly, and the person sitting on the wheelchair can easily operate the flipping adjustment of the backrest frame, which is convenient for the person using the wheelchair to operate by himself, convenient for people to use, and convenient for people to adjust the backrest frame to lie back and rest; the above structure is simple, with small force, easy to operate, low manufacturing cost, easy to assemble and produce, and high production efficiency; 2. A left valve switch handbrake is connected to the left push handle. The left valve switch handbrake is connected to a left wire rope, and the bottom of the left wire rope is fixedly connected to the rear end of the left valve switch lever; a right valve switch handbrake is connected to the right push handle. The right valve switch handbrake is connected to a right wire rope, and the bottom of the right wire rope is fixedly connected to the rear end of the right valve switch lever; it is convenient for the person pushing the wheelchair from behind to adjust the angle inclination of the backrest frame; 3. This product can not only adjust the inclination of the backrest frame on one side of the wheelchair, but also adjust the inclination from the rear of the backrest frame, which is convenient for use and has strong practicability of this structure. 4. Left and right armrest frames that can be flipped and opened are provided on the left and right sides of the wheelchair, which is convenient for people to get on and off the wheelchair on both the left and right sides; 5. Left and right rear wheel handbrakes are provided on the left and right sides of the wheelchair, which is convenient for the person sitting on the wheelchair to operate the brakes of the wheelchair by himself; 6. The front tops of the left frame and the right frame are movably connected to the corresponding left leg support footrest and right leg support footrest, which is convenient for the person sitting on the wheelchair to adjust the flipping use of the left leg support footrest and the right leg support footrest by himself, so as to adapt to sitting and lying down to support the feet, and it is convenient to use as a whole. Description of the Drawings

[0016] Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 is a three-dimensional view of the product of the present invention;

[0017] Figure 5Stereogram of the connection structure of the backrest frame, left pneumatic rod, left lower valve seat, left valve switch lever, right pneumatic rod, right lower valve seat, right valve switch lever, seat, first wire rope assembly, main pull wire rope, rear left pull wire rope, rear right pull wire rope, first valve switch handbrake, left push handle, left valve switch handbrake, left wire rope, right push handle, right valve switch handbrake, and right wire rope of the product of the present utility model;

[0018] Figure 6 、 Figure 7 Stereogram of the connection structure of the left pneumatic rod, left lower valve seat, left valve switch lever, right pneumatic rod, right lower valve seat, right valve switch lever, first wire rope assembly, main pull wire rope, rear left pull wire rope, rear right pull wire rope, first valve switch handbrake, left push handle, left valve switch handbrake, left wire rope, right push handle, right valve switch handbrake, and right wire rope of the product of the present utility model;

[0019] Figure 8 Exploded view of the left pneumatic rod, left lower valve seat, left valve switch lever, right pneumatic rod, right lower valve seat, right valve switch lever, first wire rope assembly, main pull wire rope, rear left pull wire rope, rear right pull wire rope, first valve switch handbrake, left push handle, left valve switch handbrake, left wire rope, right push handle, right valve switch handbrake, and right wire rope of the product of the present utility model;

[0020] Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 Stereogram of the product of the present utility model with the left armrest frame and the right frame opened;

[0021] Figure 13 、 Figure 14 Stereogram of the backrest frame of the product of the present utility model reclined backward, the left leg support footrest flipped up, and the right leg support footrest flipped up;

[0022] Figure 15 、 Figure 16 Side view of the backrest frame of the product of the present utility model reclined backward, the left leg support footrest flipped up, and the right leg support footrest flipped up.

[0023] Left rear large caster 1, left side frame 2, left front small caster 3, left side armrest frame 4, middle X-shaped frame 5, right rear large caster 6, right side frame 7, right front small caster 8, right side armrest frame 9, backrest frame 10, left air rod 11, lower left valve seat 11A, left valve switch lever 11B, right air rod 12, lower right valve seat 12A, right valve switch lever 12B, seat 13, first wire rope assembly 14, main pulling wire rope 141, rear left pulling wire rope 142, rear right pulling wire rope 143, first valve switch handbrake 15, left push handle 16, left valve switch handbrake 161, left wire rope 162, right push handle 17, right valve switch handbrake 171, right wire rope 172, right frame seat 18, right socket 19, right elastic locking pin 20, left frame seat 21, left socket 22, left elastic locking pin 23, left rear wheel handbrake 24, right rear wheel handbrake 25, left extended anti-tipping rod 26, left small caster 27, right extended anti-tipping rod 28, right small caster 29, left leg support footrest 30, left support air rod 31, right leg support footrest 32, right support air rod 33. Detailed implementation

[0024] As Figures 1 to 16 shown: A multi-functional wheelchair, including a left rear large caster 1, a left side frame 2, a left front small caster 3, a left side armrest frame 4, a middle X-shaped frame 5, a right rear large caster 6, a right side frame 7, a right front small caster 8, a right side armrest frame 9, a backrest frame 10, a left air rod 11, and a right air rod 12;

[0025] The left side frame 2, the middle X-shaped frame 5, and the right side frame 7 are made of aluminum, which is relatively light and reduces the weight;

[0026] The outside of the rear part of the left side frame 2 is connected with a left rear large caster 1, the front bottom is connected with a left front small caster 3, and the top is connected with a left side armrest frame 4; The left front small caster 3 can rotate 360 degrees relative to the left side frame 2360 to facilitate turning during pushing; The outside of the rear part of the right side frame 7 is connected with a right rear large caster 6, the front bottom is connected with a right front small caster 8, and the top is connected with a right side armrest frame 9; The right front small caster 8 can rotate 360 degrees relative to the right side frame 7360 to facilitate turning during pushing; The left side frame 2 and the right side frame 7 are connected with the middle X-shaped frame 5 through bolt assemblies, and the top of the middle X-shaped frame 5 is connected with a seat 13 through bolt assemblies; The left side armrest frame 4 and the right side armrest frame 9 prevent the elderly, the weak, the sick, and the disabled from falling out from both sides due to unstable sitting;

[0027] The main technical improvement of this product lies in:

[0028] The left air rod 11 and the right air rod 12 are installed vertically upside down, with the rod barrel seat at the top and the telescopic rod at the bottom. The backrest frame 10 is stably supported by the left air rod 11 and the right air rod 12 together, and the balance is good; The lengths of the left air rod 11 and the right air rod 12 are between 30 cm and 50 cm;

[0029] The top of the barrel seat of the left air rod 11 is movably connected to the middle and rear section on the left side of the backrest frame 10 (that is: the middle and rear section on the left side of the backrest frame 10 and the top of the barrel seat of the left air rod 11 are jointly connected by a screw component passing through the bodies of both to prevent detachment, so that they are movably connected between the middle and rear section on the left side of the backrest frame 10 and the top of the barrel seat of the left air rod 11). The bottom of the telescopic rod of the left air rod 11 is fixedly connected with a left lower valve seat 11A by a nut component. The left lower valve seat 11A is movably connected to the upper rear part of the left side frame 2 (that is: the left lower valve seat 11A and the upper rear part of the left side frame 2 are jointly connected by a screw component passing through the bodies of both to prevent detachment, so that they are movably connected between the left lower valve seat 11A and the upper rear part of the left side frame 2). A left valve switch lever part 11B is movably connected to the left lower valve seat 11A (that is: the middle section of the left lower valve seat 11A and the left valve switch lever part 11B are jointly connected by a cross-through screw to prevent detachment, so that they are movably connected between the middle section of the left lower valve seat 11A and the left valve switch lever part 11B). The inner end of the left valve switch lever part 11B is in elastic valve contact connection with the telescopic rod of the left air rod 11;

[0030] The top of the barrel seat of the right air rod 12 is movably connected to the middle and rear section on the right side of the backrest frame 10 (that is: the middle and rear section on the right side of the backrest frame 10 and the top of the barrel seat of the right air rod 12 are jointly connected by a screw component passing through the bodies of both to prevent detachment, so that they are movably connected between the middle and rear section on the right side of the backrest frame 10 and the top of the barrel seat of the right air rod 12). The bottom of the telescopic rod of the right air rod 12 is fixedly connected with a right lower valve seat 12A by a nut component. The right lower valve seat 12A is movably connected to the upper rear part of the right side frame 7 (that is: the right lower valve seat 12A and the upper rear part of the right side frame 7 are jointly connected by a screw component passing through the bodies of both to prevent detachment, so that they are movably connected between the right lower valve seat 12A and the upper rear part of the right side frame 7). A right valve switch lever part 12B is movably connected to the right lower valve seat 12A (that is: the middle section of the right lower valve seat 12A and the right valve switch lever part 12B are jointly connected by a cross-through screw to prevent detachment, so that they are movably connected between the middle section of the right lower valve seat 12A and the right valve switch lever part 12B). The inner end of the right valve switch lever part 12B is in elastic valve contact connection with the telescopic rod of the right air rod 12;

[0031] The rear ends of the left valve switch lever part 11B and the right valve switch lever part 12B are jointly connected with an open valve switch first wire rope assembly 14 by a screw component. The other end of the first wire rope assembly 14 is connected with a first valve switch handbrake 15. The first valve switch handbrake 15 is fixedly installed on the left armrest frame 4 or the right armrest frame 9 by a screw component.

[0032] The purpose of installing the first valve switch handbrake 15 on the left armrest frame 4 or the right armrest frame 9 is to be closer to the human hand on the corresponding side. The human hand can easily grasp the first valve switch handbrake 15, making it convenient for the human hand to find the first valve switch handbrake 15. Under normal conditions, the telescopic rods of the left air rod 11 and the right air rod 12 pop out to erect and support the backrest frame 10, which is used by leaning against the human back in an erect state. When the backrest frame 10 needs to be reclined and tilted, the person sits on the wheelchair and operates the first valve switch handbrake 15 with the hand on the corresponding side to pull up the handbrake. The first wire rope assembly 14 tightens, and the first wire rope assembly 14 synchronously pulls the outer ends of the left valve switch lever 11B and the right valve switch lever 12B. The left valve switch lever 11B and the right valve switch lever 12B use the lever principle to synchronously press down the elastic valves of the telescopic rods of the corresponding left air rod 11 and the right air rod 12. The valves of the two air rods are opened, allowing internal and external ventilation of the two air rods. The air pressure can freely compress and adjust the length. Then, the person uses their back to press hard against the backrest frame 10, and the backrest frame 10 will be forced to flip and tilt backward. The telescopic rods of the two air rods are compressed and shortened. When it flips and tilts to a suitable angle (position), then the hand releases the first valve switch handbrake 15, relaxing the first wire rope assembly 14. The left valve switch lever 11B and the right valve switch lever 12B are relaxed and no longer press the elastic valves of the telescopic rods of the left air rod 11 and the right air rod 12. The valves of the two air rods automatically reset and pop out, closing the valves and preventing further internal and external ventilation. Thus, they are sucked tight by the air pressure, fixing the length of the telescopic rods of the two air rods, and thereby fixing the reclined angle of the backrest frame 10, allowing the person's back to recline and facilitating the person to recline and rest. The first valve switch handbrake 15 is fixedly installed on the left armrest frame 4 or the right armrest frame 9 and can be easily operated, making it convenient for the person sitting on the wheelchair to operate by themselves and facilitating use. The backrest frame 10 of this product can be adjusted from 0 degrees to 45 degrees and can be tilted and adjusted at any angle within the range of 0 degrees to 45 degrees. The erect vertical state is 0 degrees, and the maximum backward flip and tilt is 45 degrees. The range of 0 degrees to 45 degrees is also a relatively safe adjustment range;

[0033] When the backrest frame 10 is to be turned upwards for tilt adjustment, when the adjustment angle is relatively small, or when it is used vertically, a person sits on the wheelchair in an upright position. By operating the first valve switch handbrake 15 with the hand on the corresponding side, pulling up the handbrake, the first wire rope assembly 14 is tightened. The first wire rope assembly 14 synchronously pulls the outer ends of the left valve switch lever 11B and the right valve switch lever 12B. The left valve switch lever 11B and the right valve switch lever 12B use the lever principle to synchronously press down the elastic valves of the telescopic rods of the corresponding left air rod 11 and the right air rod 12 at the inner ends. The valves of the two air rods are opened, allowing internal and external ventilation of the two air rods. The air pressure can freely compress the length for adjustment. The telescopic rods of the two air rods slowly pop out and extend, and the two air rods become longer, supporting the backrest frame 10. When it is turned upwards to a suitable position or when the backrest frame 10 is vertical, then the hand releases the first valve switch handbrake 15, relaxing the first wire rope assembly 14. The left valve switch lever 11B and the right valve switch lever 12B are relaxed and no longer press the elastic valves of the telescopic rods of the left air rod 11 and the right air rod 12. The valves of the two air rods automatically reset and pop out, closing the valves so that internal and external ventilation is no longer possible. Thus, they are sucked tightly by the air pressure, fixing the lengths of the telescopic rods of the two air rods, and thereby fixing the rear tilt angle of the backrest frame 10 or keeping the backrest frame 10 in a vertical state.

[0034] Further improvement of the preferred technical solution: The first wire rope assembly 14 includes a main pulling wire rope 141, a rear left pulling wire rope 142, and a rear right pulling wire rope 143. The front end of the main pulling wire rope 141 is connected to the first valve switch handbrake 15. The front end of the main pulling wire rope 141 is connected to one ends of the rear left pulling wire rope 142 and the rear right pulling wire rope 143. The other end of the rear left pulling wire rope 142 is fixedly connected to the rear end of the left valve switch lever 11B. The other end of the rear right pulling wire rope 143 is fixedly connected to the rear end of the right valve switch lever 12B. The main pulling wire rope 141 branches to connect the rear left pulling wire rope 142 and the rear right pulling wire rope 143; This structure is simple, easy to set up, and has good synchronous coordination.

[0035] Further improvement of the preferred technical solution: On the left and right sides of the rear top of the backrest frame 10, a left push handle 16 and a right push handle 17 are fixedly connected by welding correspondingly. The left push handle 16 is fixedly connected to a left valve switch handbrake 161 with a screw assembly. The left valve switch handbrake 161 is fixedly connected to a left wire rope 162 with a nail body. The bottom of the left wire rope 162 is fixedly connected to the rear end of the left valve switch lever 11B with a screw assembly;

[0036] The right push handle 17 is fixedly connected to a right valve switch handbrake 171 with a screw assembly. The right valve switch handbrake 171 is fixedly connected to a right wire rope 172 with a nail body. The bottom of the right wire rope 172 is fixedly connected to the rear end of the right valve switch lever 12B with a screw assembly.

[0037] When in use, the person pushing the wheelchair synchronously pulls up the left valve switch handbrake 161 and the right valve switch handbrake 171 with both hands. The left valve switch handbrake 161 and the right valve switch handbrake 171 pull the corresponding left steel wire rope 162 and right steel wire rope 172 to tighten. The left steel wire rope 162 and the right steel wire rope 172 synchronously pull the outer ends of the corresponding left valve switch lever member 11B and right valve switch lever member 12B. The left valve switch lever member 11B and the right valve switch lever member 12B use the lever principle to synchronously press down the elastic valves of the telescopic rods of the corresponding left air rod 11 and right air rod 12 at the inner ends. The valves of the two air rods are opened, and air is allowed to flow in and out of the two air rods. The air pressure can freely compress the length for adjustment. Then, the person uses hand force to flip the backrest frame 10. The telescopic rods of the two air rods can thus freely extend and retract. When it is flipped and tilted to a suitable angle (position), then the left valve switch handbrake 161 and the right valve switch handbrake 171 are released. The left steel wire rope 162 and the right steel wire rope 172 are relaxed. The left valve switch lever member 11B and the right valve switch lever member 12B are relaxed and no longer press the elastic valves of the telescopic rods of the left air rod 11 and the right air rod 12. The valves of the two air rods automatically reset and pop out, closing the valves so that air can no longer flow in and out. Thus, they are sucked tightly by the air pressure, fixing the length of the telescopic rods of the two air rods, and thereby fixing the rear tilt angle of the backrest frame 10; it is convenient for the person pushing the wheelchair from the rear to adjust the tilt angle of the backrest frame 10; not only can the tilt angle of the backrest frame 10 be adjusted on one side of the wheelchair, but also the tilt angle can be adjusted from the rear of the backrest frame 10, which is convenient for use, and this structure has strong practicability.

[0038] Further improvement of the preferred technical solution: The first valve switch handbrake 15 is fixedly installed on the right armrest frame 9 with screw components, which is convenient for installation and operation at a suitable position;

[0039] The upper rear part of the right frame 7 is movably connected to the rear bottom of the right armrest frame 9 (that is: the upper rear part of the right frame 7 and the rear bottom of the right armrest frame 9 are jointly connected by a screw component passing through the two bodies to prevent detachment, so that the upper rear part of the right frame 7 and the rear bottom of the right armrest frame 9 are movably connected); The front top of the right frame 7 is fixedly connected with a right frame seat 18 by screw components. A right jack 19 is opened at the top of the right frame seat 18. The front bottom of the right armrest frame 9 is detachably inserted into the right jack 19, and the front bottom of the right armrest frame 9 and the right frame seat 18 are connected by a right elastic locking pin 20;

[0040] When in use, first manually open the right elastic locking pin 20, then hold the front top of the right armrest frame 9 with the hand, and then lift it to turn the right armrest frame 9 upwards and backwards. In this way, the space on the right front side of the seat 13 is opened, facilitating people to get on and off the vehicle from the right side of the seat 13; when holding the front top of the right armrest frame 9 and pressing it down, the right armrest frame 9 turns downwards, the front bottom of the right armrest frame 9 is inserted into the right jack 19, and the right elastic locking pin 20 is automatically locked, so that the front bottom of the right armrest frame 9 is fixedly connected to the right frame base 18 and cannot be automatically opened.

[0041] Since the first wire rope assembly 14 is soft, the activity and turning of the right armrest frame 9 held by hand are not affected;

[0042] Further improvement of the preferred technical solution: The upper rear part of the left frame 2 is movably connected to the rear bottom of the left armrest frame 4 (that is: the upper rear part of the left frame 2 and the rear bottom of the left armrest frame 4 are jointly connected by a screw assembly passing through the bodies of both to prevent disconnection, so that the upper rear part of the left frame 2 and the rear bottom of the left armrest frame 4 are movably connected); the front top of the left frame 2 is fixedly connected to a left frame base 21 by a screw assembly, a left jack 22 is opened at the top of the left frame base 21, the front bottom of the left armrest frame 4 is detachably inserted into the left jack 22, and the front bottom of the left armrest frame 4 and the left frame base 21 are connected by a left elastic locking pin 23.

[0043] When in use, first manually open the left elastic locking pin 23, then hold the front top of the left armrest frame 4 with the hand, and then lift it to turn the left armrest frame 4 upwards and backwards. In this way, the space on the left front side of the seat 13 is opened, facilitating people to get on and off the vehicle from the left side of the seat 13; when holding the front top of the left armrest frame 4 and pressing it down, the left armrest frame 4 turns downwards, the front bottom of the left armrest frame 4 is inserted into the left jack 22, and the left elastic locking pin 23 is automatically locked, so that the front bottom of the left armrest frame 4 is fixedly connected to the left frame base 21 and cannot be automatically opened.

[0044] Further improvement of the preferred technical solution: The outer wall of the middle section of the left frame 2 is fixedly connected to the left rear wheel handbrake 24 by a screw assembly, facilitating people sitting on the wheelchair to operate the left rear wheel handbrake 24 on the left side to brake or not brake the left rear large caster 1.

[0045] Further improvement of the preferred technical solution: The outer wall of the middle section of the right frame 7 is fixedly connected to the right rear wheel handbrake 25 by a screw assembly, facilitating people sitting on the wheelchair to operate the right rear wheel handbrake 25 on the right side to brake or not brake the right rear large caster 6.

[0046] Further improvement of the preferred technical solution: The rear bottom of the left frame 2 extends backwards to connect to a left extended anti-backward rod 26, and the end of the left extended anti-backward rod 26 is connected to a left small caster 27; the rear bottom of the right frame 7 extends backwards to connect to a right extended anti-backward rod 28, and the end of the right extended anti-backward rod 28 is connected to a right small caster 29.

[0047] When the backrest frame 10 is in the reclined position and tilted backward, as the person lying on the wheelchair is affected by gravity and the center of gravity is at the rear, the left extended anti-backward rod 26, the left small caster 27, the right extended anti-backward rod 28, and the right small caster 29 play a role in supporting left and right to prevent the wheelchair from tipping backward.

[0048] Further improvement of the preferred technical solution: The top of the front end of the left frame 2 is movably connected with a left leg support footrest 30 through a screw assembly. There is also a left support air rod 31 with adjustable angle inclination movably connected between the rear wall of the left leg support footrest 30 and the middle part of the front end of the left frame 2 through a screw assembly. By operating the valve rod of the left support air rod 31, the telescopic rod of the air rod can be adjusted by ventilation. After ventilation, it can be adjusted telescopically. After the valve of this air rod is opened, the left leg support footrest 30 can be flipped and adjusted, mainly to adapt to the adjustment of the footrest for sitting and lying positions. After adjusting to a suitable inclination angle, release the valve rod of the left support air rod 31. After the valve is closed, the inclination of the left leg support footrest 30 is determined.

[0049] Further improvement of the preferred technical solution: The top of the front end of the right frame 7 is movably connected with a right leg support footrest 32 through a screw assembly. There is also a right support air rod 33 with adjustable angle inclination movably connected between the rear wall of the right leg support footrest 32 and the middle part of the front end of the right frame 7 through a screw assembly. By operating the valve rod of the right support air rod 33, the telescopic rod of the air rod can be adjusted by ventilation. After ventilation, it can be adjusted telescopically. After the valve of this air rod is opened, the right leg support footrest 32 can be flipped and adjusted, mainly to adapt to the adjustment of the footrest for sitting and lying positions. After adjusting to a suitable inclination angle, release the valve rod of the right support air rod 33. After the valve is closed, the inclination of the right leg support footrest 32 is determined.

Claims

1. A multifunctional wheelchair, comprising a left rear large caster, a left side frame, a left front small caster, a left handrail frame, a middle X-shaped frame, a right rear large caster, a right side frame, a right front small caster, a right handrail frame, a backrest frame, a left gas rod, and a right gas rod; the left side frame is connected to the left rear large caster at the rear outer side, the left front small caster is connected to the front bottom, and the left handrail frame is connected to the top; the right side frame is connected to the right rear large caster at the rear outer side, the right front small caster is connected to the front bottom, and the right handrail frame is connected to the top; the middle X-shaped frame is connected between the left and right frames, and the top of the middle X-shaped frame is connected to a seat; characterized in that: The left gas rod and the right gas rod are installed in an inverted vertical position, and the left gas rod and the right gas rod jointly support the backrest frame; The left rear middle section of the backrest frame is movably connected to the top of the rod tube seat of the left gas rod, the bottom of the telescopic rod of the left gas rod is fixedly connected to the left lower valve seat, the left lower valve seat is movably connected to the rear upper part of the left frame, the left lower valve seat is movably connected to the left valve switch lever, and the inner end of the left valve switch lever is contact-connected with the elastic valve of the telescopic rod of the left gas rod; The right rear middle section of the backrest frame is movably connected to the top of the rod tube seat of the right gas rod, the bottom of the telescopic rod of the right gas rod is fixedly connected to the right lower valve seat, the right lower valve seat is movably connected to the rear upper part of the right frame, the right valve switch lever is movably connected at the right lower valve seat, and the inner end of the right valve switch lever is contact-connected with the elastic valve of the telescopic rod of the right gas rod; The rear ends of the left valve switch lever and the right valve switch lever are commonly connected to the first steel wire rope assembly of the public valve switch. The other end of the first steel wire rope assembly is connected to the first valve switch handbrake, and the first valve switch handbrake is fixedly installed on the left handrail or the right handrail.

2. A multifunctional wheelchair according to claim 1, characterized in that: The left and right sides of the rear top of the backrest frame are fixedly connected to the left and right handlebars, the left handlebar is connected to the left valve switch handbrake, the left valve switch handbrake is connected to the left wire rope, and the bottom of the left wire rope is fixedly connected to the rear end of the left valve switch lever member; The right cart handle is connected with a right valve switch handbrake, the right valve switch handbrake is connected with a right steel wire rope, and the bottom of the right steel wire rope is fixedly connected to the rear end of the right valve switch lever member.

3. A multifunctional wheelchair according to claim 1 or 2, characterized in that: The first valve switch handbrake is fixedly installed on the right handrail; The rear upper part of the right side frame is movably connected to the rear bottom part of the right side armrest frame; the front top part of the right side frame is fixedly connected to a right frame seat, the top of the right frame seat is provided with a right plugging hole, the front bottom part of the right side armrest frame is detachably inserted into the right plugging hole, and the front bottom part of the right side armrest frame is connected to the right frame seat by a right elastic locking pin.

4. A multifunctional wheelchair according to claim 1 or 2, characterized in that: The rear upper part of the left side frame is movably connected to the rear bottom part of the left side armrest frame; the front top part of the left side frame is fixedly connected to a left frame seat, the top of the left frame seat is provided with a left plugging hole, the front bottom part of the left side armrest frame is detachably inserted into the left plugging hole, and the front bottom part of the left side armrest frame is connected to the left frame seat by a left elastic locking pin.

5. The multifunctional wheelchair according to claim 1, characterized in that: The outer wall of the middle section of the left side frame is fixedly connected to the left rear wheel handbrake.

6. A multifunctional wheelchair according to claim 1, characterized in that: The outer wall of the middle section of the right side frame is fixedly connected to the right side rear wheel handbrake.

7. The multifunctional wheelchair according to claim 1, characterized in that: The rear bottom of the left side frame is connected to a left extended anti-falling rod, and the end of the left extended anti-falling rod is connected to a left caster.

8. The multifunctional wheelchair according to claim 1, characterized in that: The rear bottom of the right side frame is connected to a right extended anti-falling rod, and the end of the right extended anti-falling rod is connected to a right caster.

9. A multifunctional wheelchair according to any one of claims 1 to 8, characterized in that: The front end top of the left side frame is movably connected with a left leg supporting pedal frame, and a left supporting gas rod with angle tilt adjustment is movably connected between the rear wall of the left leg supporting pedal frame and the front end middle of the left side frame.

10. A multifunctional wheelchair according to any one of claims 1 to 8, characterized in that: The front end top of the right side frame is movably connected with a right leg supporting pedal frame, and a right supporting gas rod with angle tilt adjustment is movably connected between the rear wall of the right leg supporting pedal frame and the front end middle of the right side frame.

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