Multifunctional wheelchair

Abstract

The invention discloses a multifunctional wheelchair which mainly comprises a left frame, a right frame, a left rear leg, a right rear leg, a left handle, a right handle, a left brake handle and a right brake handle, two directional wheels are arranged at the front end of the multifunctional wheelchair, two universal wheels are arranged at the rear end of the multifunctional wheelchair, and the left frame and the right frame are of a bilateral symmetry structure. The left handle and the right handle are installed at the upper ends of the left frame and the right frame respectively and can swing back and forth and be positioned, a left brake handle and a right brake handle are arranged on the lower side of the left handle and the lower side of the right handle respectively, the two brake handles can achieve the braking effect of the two front wheels, and the left frame and the right frame are connected and positioned through three sets of foldable supporting rods. A foldable seat is further arranged between the left frame and the right frame, the left rear leg and the right rear leg are installed on the outer side of the left frame and the outer side of the right frame respectively and can swing front and back and be positioned, the multifunctional wheelchair has three modes which are the walking aid mode, the wheelchair mode and the folding mode respectively, and a user can freely select the modes according to actual requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of rehabilitation wheelchairs, and in particular to a multifunctional wheelchair. Background Art

[0002] The multifunctional wheelchair is a walking aid designed for the elderly and rehabilitation patients. Its advantages are mainly reflected in the following aspects: the multifunctional wheelchair not only has the mobility function of a traditional wheelchair, but can also be adjusted according to the height of the user, the mode can be adjusted according to the walking aid needs, and it can be folded according to the storage needs to meet the needs of users in different scenarios; for users with weaker physical strength, the multifunctional wheelchair can adopt the wheelchair mode, the user can sit on the seat and be pushed by the accompanying person to walk; for users who can still walk with assistance, the multifunctional wheelchair can adopt the walking aid mode as an auxiliary tool to help them maintain balance, reduce the risk of falling, and enhance the strength of the lower limbs; In order to facilitate carrying and storage, the multifunctional wheelchair can be folded. After folding, the space occupied is greatly reduced, and it can be put into a small space such as a car trunk, making it convenient for users to take long-distance family trips; the multifunctional wheelchair is also equipped with a reliable braking system to ensure that the user can stop quickly and maintain stability when needed; when the multifunctional wheelchair is used in a home environment, it is convenient for the elderly and rehabilitation patients to carry out daily activities; in medical institutions, the multifunctional wheelchair can be used as an auxiliary tool to help patients with rehabilitation training and treatment; in summary, the multifunctional walker wheelchair has become an ideal choice for the elderly and rehabilitation patients with its functional diversity, design advantages, high safety and a wide range of applicable scenarios. Summary of the invention

[0003] To address the deficiencies in the prior art, the present invention aims to provide a multifunctional wheelchair, mainly comprising a left frame, a right frame, a left rear leg, a right rear leg, a left handle, a right handle, a left brake handle, a right brake handle, a left seat cushion, a right seat cushion, a left upper strut, a right upper strut, a left lower strut, a right lower strut, a left front wheel, a right front wheel, a left rear wheel and a right rear wheel, characterized in that the interior of the left frame is a hollow structure, a left handrail is longitudinally arranged on the front side thereof, a left front locating hole and a left rear locating hole are arranged on the upper end of the left frame, a pair of left leg locating frames are arranged on the outer side of the left frame, a left T-shaped rod is transversely arranged on the inner side of the left frame, a left wire tube locating port is arranged inside the front end of the left frame, a left front wheel is installed on the lower end of the left frame, and the right frame and the right frame form a left-right symmetrical structure, and the right frame A pair of right leg positioning frames are provided on the outer side of the frame, a right T-shaped rod is horizontally arranged on the inner side of the right frame, a right wire tube positioning port is arranged inside the front end of the right frame, and a right front wheel that can rotate freely is installed at the lower end of the right frame; the front end of the left rear leg is rotatably connected with the left rotating shaft in the left leg positioning frame, and the left rear wheel is installed at the rear end of the left rear leg, and the left leg insertion rod can be inserted into the left front limiting hole or the left rear limiting hole in the left leg positioning frame to achieve locking of the left rear leg; the front end of the right rear leg is rotatably connected with the right rotating shaft in the right leg positioning frame, the right rear wheel is installed at the rear end of the right rear leg, and the right leg insertion rod can be inserted into the right front limiting hole or the right rear limiting hole in the right leg positioning frame to achieve locking of the right rear leg; the left end of the left upper support rod is rotatably connected with the left frame, and its right end is rotatably connected with the left end of the right upper support rod The right end of the right upper support rod is rotatably connected to the right frame, and the upper support rod spring is installed between the left upper support rod and the right upper support rod; the number of the left lower support rods is two, the left ends of the two left lower support rods are rotatably connected to the lower end of the left frame, the right ends of the two left lower support rods are respectively rotatably connected to the left ends of the two right lower support rods, and the right ends of the two right lower support rods are rotatably connected to the lower end of the right frame, and the two lower support rod springs are respectively installed between the corresponding two left lower support rods and the right lower support rod; the left transfer piece is rotatably installed on the inner side of the left frame, the left front end of the left seat cushion is rotatably connected to the left transfer piece, the left notch at the left rear end of the left seat cushion can be stuck in the upper side of the left T-shaped rod, the right transfer piece is rotatably installed on the inner side of the right frame, the right front end of the right seat cushion is rotatably connected to the right transfer piece The parts are rotatably connected, the right notch at the rear end of the right side of the right seat cushion can be stuck into the upper side of the right T-shaped rod, and the right side of the left seat cushion is rotatably connected to the left side of the right seat cushion; the front end of the left handle is rotatably connected to the upper end of the left frame, the left handle insertion rod and the left insertion rod spring are installed at the front end of the left handle, and under the elastic force of the left insertion rod spring, the lower end of the left handle insertion rod is inserted into the left front positioning hole or the left rear positioning hole to achieve the locking of the left handle, and the left brake handle is installed on the lower side of the left handle; the front end of the right handle is rotatably connected to the upper end of the right frame, the right handle insertion rod and the right insertion rod spring are installed at the front end of the right handle, and under the elastic force of the right insertion rod spring, the lower end of the right handle insertion rod is inserted into the right front positioning hole or the right rear positioning hole to achieve the locking of the right handle, and the right brake handle is installed on the lower side of the right handle;The left brake block is installed at the front end of the left frame and can move forward and backward. The left brake spring is installed between the left brake block and the left wire tube positioning port. A steel wire is arranged inside the left wire tube. The left wire tube is installed between the left brake handle and the left wire tube positioning port. The steel wire is installed between the lever handle in the left brake handle and the left brake block. When the left brake handle is squeezed, the steel wire pulls the left brake block to move backward to achieve the braking effect of the left front wheel. The braking principle, structure and principle of the right front wheel are the same as those of the left front wheel. When the brake handle is squeezed, the right brake block moves backward to achieve the braking effect of the right front wheel. ;

[0004] As a further solution of the present invention: the upper ends of the left frame and the right frame are both provided with inclined planes with their front ends facing upward.

[0005] As a further solution of the present invention: the left front wheel and the right front wheel are fixed wheel structures, and the left rear wheel and the right rear wheel are universal wheel structures.

[0006] As a further solution of the present invention: the upper left support rod, the upper right support rod, the lower left support rod and the lower right support rod are all plate bending structures, and their transverse cross-sections are all U-shaped.

[0007] As a further solution of the present invention: sponge pads are arranged on the upper sides of the left seat cushion and the right seat cushion, which can provide users with a better riding experience.

[0008] As a further solution of the present invention: the left handle insertion rod and the upper end of the pull ring are both provided with a circular pull ring, which facilitates the pulling operation.

[0009] As a further solution of the present invention: the left wire drawing tube and the right wire drawing tube can be bent radially to a certain extent, but cannot be axially contracted, and the outer sides thereof are wire tube structures.

[0010] As a further solution of the present invention: when the multi-functional wheelchair is in the walking assistance mode and the wheelchair mode, the left hind leg and the right hind leg swing backwards, and the left leg insertion rod is inserted into the left rear limiting hole of the left leg positioning frame and presses the outer side of the left hind leg, and the right leg insertion rod is inserted into the right rear limiting hole of the right leg positioning frame and presses the outer side of the right hind leg, thereby achieving fixed limitation of the left hind leg and the right hind leg.

[0011] As a further solution of the present invention: when the multifunctional wheelchair is in the folding mode, the left rear leg and the right rear leg swing forward, and the left leg insertion rod is inserted into the left front limiting hole of the left leg positioning frame and presses the inner side of the left rear leg, and the right leg insertion rod is inserted into the right front limiting hole of the right leg positioning frame and presses the inner side of the right rear leg, thereby achieving fixed limitation of the left rear leg and the right rear leg.

[0012] The beneficial effects of the present invention are as follows: (1) The multifunctional wheelchair has a variety of modes for users to choose from according to their needs. When the user needs to exercise properly, the walking-assisting mode can be used. The user can hold the two handles with both hands for assisted walking, and the two brakes help to improve the safety of assisted walking. When the user lacks physical strength, the wheelchair mode can be used. The user can sit on the seat and the accompanying person can push the multifunctional wheelchair to move. When traveling by car, the multifunctional wheelchair can be folded. The folded multifunctional wheelchair can significantly reduce the space volume and is convenient for storage and transportation. (2) When the multifunctional wheelchair is in the wheelchair mode, the accompanying person needs to be located behind the multifunctional wheelchair. After the two handles are swung backward, the handles are tilted downward, making it more comfortable for the accompanying person to operate. When the multifunctional wheelchair is in the walking-assisting mode, the user is located inside the multifunctional wheelchair. After the two handles are swung forward, the two handles are in a horizontal state, making it more comfortable for the user to operate. Such a design fully considers the principles of ergonomics. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention when it is in wheelchair mode.

[0014] Figure 2 It is a schematic diagram of the overall structure of the present invention when it is in the walking-assisting mode.

[0015] Figure 3 It is a schematic diagram of the overall structure of the present invention when it is in a folding mode.

[0016] Figure 4 It is an enlarged schematic cross-sectional view of the left handle position in the present invention.

[0017] Figure 5 It is a partial cross-sectional enlarged schematic diagram of the positions of the three groups of support rods when the present invention is in the folding mode.

[0018] Figure 6 It is a partial enlarged structural schematic diagram of the positions of the left seat cushion and the right seat cushion in the present invention.

[0019] Figure 7 It is a schematic diagram of the enlarged structure of a local section of the left front wheel position in the present invention.

[0020] Reference numerals: 1 left frame, 101 left handrail, 102 left leg positioning frame, 103 left upper connecting ear, 104 left lower connecting ear, 105 left T-shaped rod, 106 left front positioning hole, 107 left rear positioning hole, 108 left wire tube positioning port, 2 right frame, 201 right handrail, 202 right leg positioning frame, 203 right upper connecting ear, 204 right lower connecting ear, 205 right T-shaped rod, 3 left rear leg, 4 right rear leg, 5 left handle, 501 positioning cavity, 6 right handle, 7 left brake handle, 8 right brake handle, 9 left handle plug rod, 901 pull ring, 10 Right handle plug rod, 11 left seat cushion, 1101 left notch, 12 right seat cushion, 1201 right notch, 13 left upper support rod, 14 right upper support rod, 15 upper support rod spring, 16 left lower support rod, 1601 left pedal, 17 right lower support rod, 1701 right pedal, 18 lower support rod spring, 19 left front wheel, 20 right front wheel, 21 left brake block, 22 left rear wheel, 23 right rear wheel, 24 right adapter, 25 left leg plug rod, 26 left adapter, 27 right leg plug rod, 28 left plug rod spring, 29 left cable tube, 30 left brake spring. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0022] like Figure 1-7As shown, a multifunctional wheelchair mainly includes a left frame 1, a right frame 2, a left rear leg 3, a right rear leg 4, a left handle 5, a right handle 6, a left brake handle 7, a right brake handle 8, a left handle plug rod 9, a right handle plug rod 10, a left cushion 11, a right cushion 12, a left upper support rod 13, a right upper support rod 14, an upper support rod spring 15, a left lower support rod 16, a right lower support rod 17, a lower support rod spring 18, a left front wheel 19, a right front wheel 20, a left brake block 21, a left rear wheel 22, and a right rear The left frame 1 has a wheel 23, a right adapter 24, a left leg plug rod 25, a left adapter 26, a right leg plug rod 27, a left plug rod spring 28, a left cable tube 29, and a left brake spring 30, characterized in that: the interior of the left frame 1 is a hollow structure, and a left handrail 101 is longitudinally arranged on the front side thereof, and the left handrail 101 can be used for the user to place the left arm when riding, and an inclined plane with a front end facing upward is arranged at the upper end of the left frame 1, and a left front positioning hole 106 is arranged at the front end of the inclined plane, and the left front positioning hole 106 is arranged at the front end of the inclined plane. A left rear positioning hole 107 is provided at the rear end, a left upper connecting ear 103 is provided on the inner side of the left frame 1, and the left upper connecting ear 103 is located at the lower side of the front end of the left handrail 101, a pair of left leg positioning frames 102 are obliquely provided near the middle of the outer side of the left frame 1, a left rotating shaft is provided at the middle position of the left leg positioning frame 102, a left front limiting hole is provided on the front side of the left rotating shaft, a left rear limiting hole is provided on the rear side of the left rotating shaft, and a left T-shaped rod 105 is transversely provided on the inner side of the left frame 1 A round rod is longitudinally arranged at the inner top of the left T-shaped rod 105, two left lower connecting ears 104 of the same structure are arranged on the inner side of the lower end of the left frame 1, a brake block window is also arranged on the inner side of the front end of the left frame 1, and a left wire tube positioning port 108 is also arranged inside the front end of the left frame 1, and the left wire tube positioning port 108 is located behind the brake block window; a freely rotatable left front wheel 19 is installed at the lower end of the left frame 1, and the left front wheel 19 is a directional wheel structure;The right frame 2 is symmetrical with the right frame 2. The interior of the right frame 2 is a hollow structure, and a right handrail 201 is longitudinally arranged on the front side thereof. The right handrail 201 can be used to place the right arm of the user when riding. The upper end of the right frame 2 is provided with an inclined plane with a front end upward, and a right front positioning hole is arranged at the front end of the inclined plane, and a right rear positioning hole is arranged at the rear end of the inclined plane. A right upper connecting ear 203 is arranged on the inner side of the right frame 2, and the right upper connecting ear 203 is located at the lower side of the front end of the right handrail 201. A pair of right leg positioning frames 202 are obliquely arranged near the middle of the outer side of the right frame 2, and the middle position of the right leg positioning frame 202 is arranged There is a right shaft, a right front limit hole is arranged on the front side of the right shaft, a right rear limit hole is arranged on the rear side of the right shaft, a right T-shaped rod 205 is arranged transversely on the inner side of the right frame 2, a round rod is arranged longitudinally on the inner top of the right T-shaped rod 205, two right lower connecting ears 204 of the same structure are arranged on the inner side of the lower end of the right frame 2, a brake block window is also arranged on the inner side of the front end of the right frame 2, a right wire tube positioning port is also arranged inside the front end of the right frame 2, and the right wire tube positioning port is located behind the above-mentioned brake block window; a freely rotatable right front wheel 20 is installed on the lower end of the right frame 2, and the right front wheel 20 is a directional wheel structure. ;

[0023] The front end of the left rear leg 3 is rotatably connected to the left rotating shaft in the left leg positioning frame 102, and the left rear wheel 22 is installed at the rear end of the left rear leg 3, and the left rear wheel 22 is a universal wheel structure; the lower end of the left leg insertion rod 25 is a circular shaft structure, and a circular ring is arranged at the upper end, and the circular ring is convenient for pulling the left leg insertion rod 25; the front end of the right rear leg 4 is rotatably connected to the right rotating shaft in the right leg positioning frame 202, and the right rear wheel 23 is installed at the rear end of the right rear leg 4, and the right rear wheel 23 is a universal wheel structure; the right leg insertion rod 27 has the same structure as the left leg insertion rod 25, and the lower end of the right leg insertion rod 27 is a circular shaft structure, and a circular ring is arranged at the upper end, and the circular ring is convenient for pulling the right leg insertion rod 27; when the multi-function When the wheelchair is in the walking assistance mode and the wheelchair mode, the left rear leg 3 and the right rear leg 4 swing backwards, and the left leg insertion rod 25 is inserted into the left rear limiting hole of the left leg positioning frame 102 and presses the outer side of the left rear leg 3, and the right leg insertion rod 27 is inserted into the right rear limiting hole of the right leg positioning frame 202 and presses the outer side of the right rear leg 4, thereby achieving fixed positioning of the left rear leg 3 and the right rear leg 4; when the multi-functional wheelchair is in the folding mode, the left rear leg 3 and the right rear leg 4 swing forwards, and the left leg insertion rod 25 is inserted into the left front limiting hole of the left leg positioning frame 102 and presses the inner side of the left rear leg 3, and the right leg insertion rod 27 is inserted into the right front limiting hole of the right leg positioning frame 202 and presses the inner side of the right rear leg 4, thereby achieving fixed positioning of the left rear leg 3 and the right rear leg 4.

[0024] like Figure 1 , Figure 2As shown, the left upper support rod 13 is a plate bending structure, and its transverse cross-section is U-shaped, and the upper left end of the left upper support rod 13 is rotatably connected to the upper left connecting ear 103; the right upper support rod 14 is a plate bending structure, and its transverse cross-section is U-shaped, and the width of the right upper support rod 14 is slightly smaller than the width of the left upper support rod 13, the upper right end of the right upper support rod 14 is rotatably connected to the upper right connecting ear 203, and the upper left end of the right upper support rod 14 is rotatably connected to the upper right end of the left upper support rod 13; the upper support rod spring 15 is a tension spring, and the left end of the upper support rod spring 15 is connected to a position of the inner bottom side of the left upper support rod 13 near the left end, and the right end of the upper support rod spring 15 is connected to a position of the inner bottom side of the right upper support rod 14 near the left end; so that when the multi-function wheel When the multifunctional wheelchair is in the open state, the left upper support rod 13 and the right upper support rod 14 are in the same straight line, and under the tension of the upper support rod spring 15, the lower left end of the right upper support rod 14 and the lower right end of the left upper support rod 13 are in a mutually compressed state, so that the left frame 1 and the right frame 2 maintain a fixed width and prevent the two from approaching each other; when the multifunctional wheelchair needs to be folded, it is necessary to press the connection position of the left upper support rod 13 and the right upper support rod 14 downward to make the upper support rod spring 15 pass over the connection shaft of the right upper support rod 14 and the left upper support rod 13, and then under the tension of the upper support rod spring 15, the left upper support rod 13 and the right upper support rod 14 rotate and approach each other, and in this process, the left frame 1 and the right frame 2 approach each other, and finally the folding of the multifunctional wheelchair is completed.

[0025] like Figure 1 , Figure 2As shown, the number of the left lower support rods 16 is two, and the left lower support rods 16 are a plate bending structure, and its transverse cross-section is U-shaped. The lower sides of the left ends of the two left lower support rods 16 are rotatably connected to the two left lower connecting ears 104 respectively, and the upper side of the left pedal 1601 is provided with an anti-slip pattern, and the left pedal 1601 is fixedly installed on the upper sides of the two left lower support rods 16, and the left pedal 1601 can be used for the user to place the left foot; the number of the right lower support rods 17 is two, and the right lower support rod 17 is a plate bending structure, and its transverse cross-section is U-shaped, and the right lower support rod 17 is a plate bending structure, and its transverse cross-section is U-shaped, and the right lower support rod 17 is a plate bending structure, and its transverse cross-section is U-shaped, and the right lower support rod 17 is a plate bending structure, and the transverse cross-section is U-shaped, and the left ... The width of 17 is slightly smaller than that of the right lower support rod 17. The lower sides of the right ends of the two right lower support rods 17 are rotatably connected to the two right lower connecting ears 204 respectively. The upper side of the right pedal 1701 is provided with an anti-slip pattern. The right pedal 1701 is fixedly installed on the upper sides of the two right lower support rods 17. The right pedal 1701 can be used for the user to place the right foot. The lower sides of the right ends of the two left lower support rods 16 are rotatably connected to the lower sides of the left ends of the two right lower support rods 17 respectively. The number of the lower support rod springs 18 is two, and the two lower support rod springs 18 are respectively installed on the two left lower support rods 1 6 and the right lower support rod 17, and the left end of each lower support rod spring 18 is respectively connected to the position of the inner top side of the corresponding left lower support rod 16 near the right end, and the right end of each lower support rod spring 18 is respectively connected to the position of the inner top side of the corresponding right lower support rod 17 near the right end; so that when the multi-functional wheelchair is in the open state, the left lower support rod 16 and the corresponding right lower support rod 17 are in the same straight line, and under the pulling force of the two lower support rod springs 18, the upper side of the right end of the left lower support rod 16 and the upper side of the left end of the corresponding right lower support rod 17 are in a state of being pressed against each other state, thereby keeping the left frame 1 and the right frame 2 at a fixed width and preventing the two from approaching each other; when the multifunctional wheelchair needs to be folded, the connection position of the left lower support rod 16 and the right lower support rod 17 needs to be pulled upwards, so that the two lower support rod springs 18 pass over the connection shaft of the left lower support rod 16 and the corresponding right lower support rod 17, and then under the pulling force of the two lower support rod springs 18, the left lower support rod 16 and the corresponding right lower support rod 17 rotate relative to each other and approach each other. In this process, the left frame 1 and the right frame 2 approach each other, and finally the folding of the multifunctional wheelchair is completed.

[0026] like Figure 1 , Figure 6As shown, the left transfer member 26 is rotatably mounted on the inner side of the left frame 1, and the rotation axis is horizontal, and the height position of the left transfer member 26 is the same as the left T-shaped rod 105; a sponge pad is arranged on the upper side of the left seat cushion 11, which can provide a better riding experience for the user, and the left front end of the left seat cushion 11 is rotatably connected to the left transfer member 26, and the rotation axis is longitudinal, and a left notch 1101 is arranged on the left rear end of the left seat cushion 11, and the left notch 1101 can be inserted into the upper side of the left T-shaped rod 105, so that the left T-shaped rod 105 It can provide upward support for the left seat cushion 11 and prevent the left seat cushion 11 from detaching from the left T-shaped rod 105; the right transfer member 24 is rotatably installed on the inner side of the right frame 2, and the rotation axis is horizontal and transverse, and the height position of the right transfer member 24 is the same as the right T-shaped rod 205; a sponge pad is arranged on the upper side of the right seat cushion 12, which can provide a better riding experience for the user, the right front end of the right seat cushion 12 is rotatably connected to the right transfer member 24, and the rotation axis is longitudinal, and the right rear end of the right seat cushion 12 is provided with a right notch 120 1, the right notch 1201 can be inserted into the upper side of the right T-shaped rod 205, so that the right T-shaped rod 205 can provide upward support for the right seat cushion 12 and prevent the right seat cushion 12 from detaching from the right T-shaped rod 205; the right side of the left seat cushion 11 is rotatably connected to the left side of the right seat cushion 12; in the wheelchair mode, the left seat cushion 11 and the right seat cushion 12 are in a horizontal state, and the left notch 1101 is inserted into the upper side of the left T-shaped rod 105, and the right notch 1201 is inserted into the upper side of the right T-shaped rod 205, and the left seat cushion 11 and the right seat cushion 12 are formed The seat can be used for users to sit on; in the walking assistance mode, the left seat cushion 11 and the right seat cushion 12 are reversed forward 270°, thereby making room for the user's legs to step; in the folding mode, the connection position of the left seat cushion 11 and the right seat cushion 12 is pulled upward to make the left seat cushion 11 and the right seat cushion 12 approach each other until they reach a nearly vertical state. During this process, the left notch 1101 rotates around the round rod at the top of the left T-shaped rod 105 but cannot be separated, and the right notch 1201 rotates around the round rod at the top of the right T-shaped rod 205 but cannot be separated.

[0027] like Figure 4As shown, the front end of the left handle 5 is a hollow structure, and the front end of the left handle 5 is provided with a cylindrical positioning cavity 501, and the front end of the left handle 5 is rotatably connected to the upper end of the left frame 1; the upper end of the left handle plug rod 9 is provided with a circular pull ring 901, and the pull ring 901 is convenient for pulling the left handle plug rod 9. The left handle plug rod 9 is provided with a circular plate, and the left handle plug rod 9 is installed in the positioning cavity 501 and can move up and down, and the left plug rod spring 28 is coaxially installed with the left handle plug rod 9, and the lower end of the left plug rod spring 28 is pressed against the upper side of the circular plate of the left handle plug rod 9, and the upper end of the left plug rod spring 28 is pressed against the top of the positioning cavity 501, so that under the elastic force of the left plug rod spring 28, the lower end of the left handle plug rod 9 is inserted into the left front positioning hole 106 or the left rear positioning hole 107, thereby realizing the position locking of the left handle 5; the left brake handle 7 is fixedly installed on the lower side of the left handle 5.

[0028] like Figure 7 As shown, the left brake shoe 21 is installed in the brake shoe window at the front end of the left frame 1 and can move forward and backward, and the left brake spring 30 is installed between the left brake shoe 21 and the left wire tube positioning port 108; the left wire tube 29 can be radially bent to a certain extent, but cannot shrink axially, and its outer side is a wire tube structure, and a steel wire is arranged inside it. A spiral bending structure is arranged near the upper end of the left wire tube 29, and the upper end of the left wire tube 29 is connected to the front end of the left brake handle 7, and the lower end of the left wire tube 29 passes through the inside of the left frame 1 and is installed in the left wire tube positioning port 108. On the rear side of 8, the upper end of the steel wire pull cable inside the left pull cable tube 29 is connected to the lever handle inside the left brake handle 7, and the lower end of the steel wire pull cable passes through the left brake spring 30 and is connected to the left brake shoe 21; therefore, when the left brake handle 7 is squeezed, the steel wire pull cable inside the left pull cable tube 29 is pulled, the left brake shoe 21 moves backward, and the outer part of the left brake shoe 21 presses the inner ring of the left front wheel 19, thereby achieving the braking effect of the left front wheel 19 under the action of friction; after the left brake handle 7 is released, the left brake spring 30 pushes the left brake shoe 21 to move forward and releases the brake on the left front wheel 19.

[0029] like Figure 1 , Figure 4As shown, the internal front end of the right handle 6 is a hollow structure, and a cylindrical positioning cavity is provided at the front end of the right handle 6. The front end of the right handle 6 is rotatably connected to the upper end of the right frame 2; the right handle insertion rod 10 has the same structure as the left handle insertion rod 9, and the right handle insertion rod is installed in the positioning cavity at the front end of the right handle 6 and can move up and down, and the right insertion rod spring is coaxially installed with the right handle insertion rod, and the lower end of the right insertion rod spring is pressed against the upper side of the right handle insertion rod circular plate, and the upper end of the right insertion rod spring is pressed against the top end of the corresponding positioning cavity, so that under the elastic force of the right insertion rod spring, the lower end of the right handle insertion rod is inserted into the right front positioning hole or the right rear positioning hole, thereby realizing the position locking of the right handle 6; the right brake handle 6 is fixedly installed on the lower side of the right handle 6.

[0030] like Figure 2 , Figure 7 As shown, the right brake shoe and the left brake shoe 21 are symmetrical in structure. The right brake shoe is installed in the brake shoe window at the front end of the right frame 2 and can move forward and backward. The right brake spring is installed between the right brake shoe and the right wire tube positioning port; the right wire tube has the same structure as the left wire tube 29, the upper end of the right wire tube is connected to the front end of the right brake handle 8, and the lower end of the right wire tube is installed on the rear side of the right wire tube positioning port after passing through the inside of the right frame 2, the upper end of the steel wire pull line inside the right wire tube is connected to the lever handle in the right brake handle 8, and the lower end of the steel wire pull line passes through the right brake spring and is connected to the right brake shoe; thus, when the right brake handle 8 is squeezed, the steel wire pull line in the right wire tube is pulled, the right brake shoe moves backward, and the outer part of the right brake shoe presses the inner ring of the right front wheel 20, thereby achieving the braking effect of the right front wheel 20 under the action of friction; after releasing the pinch on the right brake handle 8, the right brake spring pushes the right brake shoe to move forward and releases the brake on the right front wheel 20.

[0031] like Figure 1As shown, when the multifunctional wheelchair is in wheelchair mode, the left rear leg 3 swings backward, and the left leg insertion rod 25 is inserted into the left rear limiting hole of the left leg positioning frame 102 and presses the outer side of the left rear leg 3, the right rear leg 4 swings backward, and the right leg insertion rod 27 is inserted into the right rear limiting hole of the right leg positioning frame 202 and presses the outer side of the right rear leg 4, the left upper support rod 13 and the right upper support rod 14 are in an open state, the two left lower support rods 16 and the two right lower support rods 17 are in an open state, at this time, the three groups of support rods constitute a three-point support principle, so that the left frame 1 and the right frame 2 maintain a stable expanded state, the left seat cushion 11 is in a horizontal state and the left notch 1101 is stuck in the left T-shaped On the upper side of the rod 105, the right seat cushion 12 is in a horizontal state and the right notch 1201 is stuck on the upper side of the right T-shaped rod 205, the left handle 5 swings backward, and the lower end of the left handle insertion rod 9 is inserted in the left front positioning hole 106, the right handle 6 swings backward, and the lower end of the right handle insertion rod 10 is inserted in the right front positioning hole. In this state, the left handle 5 and the right handle 6 are in a backward tilted state, which is convenient for the accompanying person to hold and operate with both hands; in this mode, the user can sit on the upper side of the left seat cushion 11 and the right seat cushion 12, and place both feet on the upper side of the left pedal 1601 and the right pedal 1701. The accompanying person can push the multi-functional wheelchair to walk by using the left handle 5 and the right handle 6.

[0032] like Figure 2 As shown, when the multifunctional wheelchair is in the walking-assisting mode, the left rear leg 3 swings backward, and the left leg insertion rod 25 is inserted into the left rear limiting hole of the left leg positioning frame 102 and presses the outer side of the left rear leg 3, the right rear leg 4 swings backward, and the right leg insertion rod 27 is inserted into the right rear limiting hole of the right leg positioning frame 202 and presses the outer side of the right rear leg 4, the left upper support rod 13 and the right upper support rod 14 are in the open state, the two left lower support rods 16 and the two right lower support rods 17 are in the open state, and the left seat cushion 1 1 and the right seat cushion 12 are reversed forward 270° to make room for the user's legs to step, the left handle 5 is swung forward, and the lower end of the left handle insertion rod 9 is inserted into the left rear positioning hole 107, the right handle 6 is swung forward, and the lower end of the right handle insertion rod 10 is inserted into the right rear positioning hole. In this state, the left handle 5 and the right handle 6 are in a horizontal state, which is convenient for the user to hold the operation with both hands and support the body; in this mode, the user can hold the left handle 5 and the right handle 6 with both hands for assisted walking.

[0033] like Figure 3As shown, when the multifunctional wheelchair is in the folding mode, the left rear leg 3 and the right rear leg 4 swing forward, and the left leg insertion rod 25 is inserted into the left front limiting hole of the left leg positioning frame 102 and presses the inner side of the left rear leg 3, and the right leg insertion rod 27 is inserted into the right front limiting hole of the right leg positioning frame 202 and presses the inner side of the right rear leg 4, pressing the connection position of the left upper support rod 13 and the right upper support rod 14 downward, and at the same time pulling the connection position of the left lower support rod 16 and the right lower support rod 17 upward, so that the left upper support rod 13 and the right upper support rod 14 are folded under the tension of the upper support rod spring 15, and the left lower support rod 16 and the right lower support rod 17 are folded under the tension of the lower support rod spring 15. The multifunctional wheelchair is folded under the tension of the spring 18, and then the connection position of the left seat cushion 11 and the right seat cushion 12 is pulled upward, the left notch 1101 rotates around the round rod at the top of the left T-shaped rod 105, and the right notch 1201 rotates around the round rod at the top of the right T-shaped rod 205. During this process, the left frame 1 and the right frame 2 approach each other until they contact each other, the left handle 5 swings forward, and the lower end of the left handle insertion rod 9 is inserted in the left rear positioning hole 107, the right handle 6 swings forward, and the lower end of the right handle insertion rod 10 is inserted in the right rear positioning hole; the volume of the multifunctional wheelchair is significantly reduced after being folded, which is convenient for transportation and storage of the multifunctional wheelchair.

Claims

1. A multifunctional wheelchair, mainly comprising a left frame (1), a right frame (2), a left rear leg (3), a right rear leg (4), a left handle (5), a right handle (6), a left brake handle (7), a right brake handle (8), a left seat cushion (11), a right seat cushion (12), a left upper support rod (13), a right upper support rod (14), a left lower support rod (16), a right lower support rod (17), a left front wheel (19), a right front wheel (20), a left rear wheel (22), and a right rear wheel (23), Features: The interior of the left frame (1) is a hollow structure, and a left handrail (101) is longitudinally arranged on the front side thereof. A left front positioning hole (106) and a left rear positioning hole (107) are arranged at the upper end of the left frame (1). A pair of left leg positioning frames (102) are arranged on the outer side of the left frame (1). A left T-shaped rod (105) is transversely arranged on the inner side of the left frame (1). A left wire pipe positioning opening (108) is arranged inside the front end of the left frame (1). A left front wheel (19) is installed at the lower end of the left frame (1). The right frame (2) and the right frame (2) form a left-right symmetrical structure. A pair of right leg positioning frames (202) are arranged on the outer side of the right frame (2). A right T-shaped rod (205) is transversely arranged on the inner side of the right frame (2). A right wire pipe positioning opening is arranged inside the front end of the right frame (2). A freely rotatable right front wheel (20) is installed at the lower end of the right frame (2). The front end of the left rear leg (3) is rotationally connected to the left rotating shaft in the left leg positioning frame (102), the left rear wheel (22) is installed at the rear end of the left rear leg (3), and the left leg insertion rod (25) can be inserted into the left front limiting hole or the left rear limiting hole in the left leg positioning frame (102) to achieve locking of the left rear leg (3); the front end of the right rear leg (4) is rotationally connected to the right rotating shaft in the right leg positioning frame (202), the right rear wheel (23) is installed at the rear end of the right rear leg (4), and the right leg insertion rod (27) can be inserted into the right front limiting hole or the right rear limiting hole in the right leg positioning frame (202) to achieve locking of the right rear leg (4); The left end of the left upper support rod (13) is rotatably connected to the left frame (1), and the right end of the left upper support rod (14) is rotatably connected to the left end of the right upper support rod (14). The right end of the right upper support rod (14) is rotatably connected to the right frame (2). The upper support rod spring (15) is installed between the left upper support rod (13) and the right upper support rod (14). There are two left lower support rods (16). The left ends of the two left lower support rods (16) are rotatably connected to the lower end of the left frame (1). The right ends of the two left lower support rods (16) are respectively rotatably connected to the left ends of the two right lower support rods (17). The right ends of the two right lower support rods (17) are respectively rotatably connected to the lower end of the right frame (2). The two lower support rod springs (18) are respectively installed between the corresponding two left lower support rods (16) and the right lower support rod (17). The left transfer member (26) is rotatably mounted on the inner side of the left frame (1); the left front end of the left seat cushion (11) is rotatably connected to the left transfer member (26); the left notch (1101) at the left rear end of the left seat cushion (11) can be inserted into the upper side of the left T-shaped rod (105); the right transfer member (24) is rotatably mounted on the inner side of the right frame (2); the right front end of the right seat cushion (12) is rotatably connected to the right transfer member (24); the right notch (1201) at the right rear end of the right seat cushion (12) can be inserted into the upper side of the right T-shaped rod (205); and the right side of the left seat cushion (11) is rotatably connected to the left side of the right seat cushion (12); The front end of the left handle (5) is rotatably connected to the upper end of the left frame (1), the left handle rod (9) and the left rod spring (28) are installed at the front end of the left handle (5), and under the elastic force of the left rod spring (28), the lower end of the left handle rod (9) is inserted into the left front positioning hole (106) or the left rear positioning hole (107) to achieve the locking of the left handle (5), and the left brake handle (7) is installed on the lower side of the left handle (5); the front end of the right handle (6) is rotatably connected to the upper end of the right frame (2), the right handle rod (10) and the right rod spring are installed at the front end of the right handle (6), and under the elastic force of the right rod spring, the lower end of the right handle rod (10) is inserted into the right front positioning hole or the right rear positioning hole to achieve the locking of the right handle (6), and the right brake handle (6) is installed on the lower side of the right handle (6). ; The left brake block (21) is installed at the front end of the left frame (1) and can move forward and backward, the left brake spring (30) is installed between the left brake block (21) and the left wire tube positioning port (108), and a steel wire is arranged inside the left wire tube (29). The left wire tube (29) is installed between the left brake handle (7) and the left wire tube positioning port (108). The steel wire is installed between the lever handle in the left brake handle (7) and the left brake block (21). When the left brake handle (7) is squeezed, the steel wire pulls the left brake block (21) to move backward, thereby achieving the braking effect of the left front wheel (19); the braking principle, structure and principle of the right front wheel (20) are the same as those of the left front wheel (19). When the brake handle (8) is squeezed, the right brake block moves backward and achieves the braking effect of the right front wheel (20).

2. A multifunctional wheelchair according to claim 1, Features: The upper ends of the left frame (1) and the right frame (2) are both provided with inclined planes with their front ends facing upwards.

3. A multifunctional wheelchair according to claim 1, Features: The left front wheel (19) and the right front wheel (20) are directional wheel structures, and the left rear wheel (22) and the right rear wheel (23) are universal wheel structures.

4. A multifunctional wheelchair according to claim 1, Features: The upper left support rod (13), the upper right support rod (14), the lower left support rod (16) and the lower right support rod (17) are all plate bending structures, and their transverse cross-sections are all U-shaped.

5. A multifunctional wheelchair according to claim 1, Features: The upper sides of the left seat cushion (11) and the right seat cushion (12) are provided with sponge pads, which can provide users with a better riding experience.

6. A multifunctional wheelchair according to claim 1, Features: The left handle insert rod (9) and the upper end of the pull ring (901) are both provided with a circular pull ring, and the pull ring is convenient for pulling operation.

7. The multifunctional wheelchair according to claim 1, Features: The left wire-drawing tube (29) and the right wire-drawing tube can both be bent radially to a certain extent, but cannot be axially contracted, and the outer sides thereof are wire-drawing tube structures.

8. The multifunctional wheelchair according to claim 1, Features: When the multifunctional wheelchair is in the walking-assistance mode and the wheelchair mode, the left rear leg (3) and the right rear leg (4) swing backwards, and the left leg insertion rod (25) is inserted into the left rear limiting hole of the left leg positioning frame (102) and presses the outer side of the left rear leg (3), and the right leg insertion rod (27) is inserted into the right rear limiting hole of the right leg positioning frame (202) and presses the outer side of the right rear leg (4), thereby achieving fixed limiting of the left rear leg (3) and the right rear leg (4).

9. The multifunctional wheelchair according to claim 1, Features: When the multifunctional wheelchair is in the folding mode, the left rear leg (3) and the right rear leg (4) swing forward, and the left leg insertion rod (25) is inserted into the left front limiting hole of the left leg positioning frame (102) and presses the inner side of the left rear leg (3), and the right leg insertion rod (27) is inserted into the right front limiting hole of the right leg positioning frame (202) and presses the inner side of the right rear leg (4), thereby achieving fixed limiting of the left rear leg (3) and the right rear leg (4).

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