Wheelchair folding structure and folding wheelchair

Abstract

The invention discloses a wheelchair folding structure which is characterized in that a rear wheel bracket is movably arranged at the rear end of a base bracket, and a cushion bracket, a backrest bracket and the base bracket are linked through a first connecting rod, a second connecting rod, a first rotating shaft, a second rotating shaft, a third rotating shaft, a fourth rotating shaft and a fifth rotating shaft; the whole wheelchair framework can be driven to be folded or unfolded only by operating any two of the components, so that operation is simpler and more convenient, and when the wheelchair framework needs to be folded, the rear wheel mounting parts can move forwards relative to the base support, so that the distance between the rear wheel mounting parts and the front wheel mounting parts can be shortened, and the wheelchair framework is more convenient to use. According to the foldable wheelchair, the distance between the rear wheels and the front wheels can be shortened, then the smaller packaging size can be achieved, the packaging and transporting cost can be reduced, the occupied storage size can be reduced, and packaging, transporting and storage of the foldable wheelchair are more convenient. In addition, the invention further discloses a folding wheelchair with the wheelchair folding structure.

Description

Technical Field

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

[0002] A wheelchair generally includes a base, a seat cushion, and a backrest. The base is used to mount the front and rear wheels and support the seat cushion, and the backrest is arranged at the rear side of the seat cushion for the user to lean against. In order to facilitate the packaging, transportation, and storage of the wheelchair, existing wheelchairs generally have a folding function. During operation, the base and the seat cushion, and the seat cushion and the backrest need to be folded or unfolded respectively, which is relatively cumbersome. In addition, when the folding wheelchair of the above structure is folded and unfolded, the distance between the front wheel and the rear wheel remains unchanged, that is, the distance between the front wheel and the rear wheel cannot be changed when the wheelchair is folded, which easily leads to the size of the wheelchair being still large after folding, and is therefore not convenient for packaging, transportation, and storage. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a wheelchair folding structure that can be easily folded and unfolded, and can further reduce the size after folding, which is convenient for packaging, transportation and storage.

[0004] In addition, the present invention also provides a folding wheelchair having the above wheelchair folding structure.

[0005] The wheelchair folding structure according to an embodiment of the present invention comprises: a wheelchair frame, comprising a seat cushion bracket, a backrest bracket and a base bracket, the backrest bracket being rotatably mounted on the rear end of the seat cushion bracket via a first rotating shaft, the base bracket being arranged below the seat cushion bracket, the front end of the base bracket having a front wheel mounting portion, the rear end of the base bracket being movably mounted with a rear wheel bracket, the rear wheel bracket having a rear wheel mounting portion; a first connecting rod assembly, comprising a first connecting rod and a second connecting rod arranged between the base bracket and the seat cushion bracket, the middle portion of the first connecting rod being rotatably connected to the middle portion of the second connecting rod via a second rotating shaft, the upper end of the first connecting rod being rotatably connected to the The seat cushion bracket is rotatably connected via a third rotating shaft, and the third rotating shaft is located at the front side of the first rotating shaft. The upper end of the second connecting rod is rotatably connected to the backrest bracket via a fourth rotating shaft, and the fourth rotating shaft is located below the first rotating shaft; one of the lower end of the first connecting rod and the lower end of the second connecting rod is rotatably connected to the rear wheel bracket via a fifth rotating shaft, and the other is rotatably connected to the base bracket via a sixth rotating shaft; the rear wheel mounting portion can move forward relative to the base bracket and make the wheelchair frame in a folded state; or, the rear wheel mounting portion can move backward relative to the base bracket and make the wheelchair frame in an unfolded state.

[0006] The wheelchair folding structure according to the embodiment of the present invention has at least the following beneficial effects:

[0007] In the wheelchair folding structure of the embodiment of the present invention, the seat cushion bracket, the backrest bracket, the base bracket and the rear wheel bracket are linked together by the first connecting rod, the second connecting rod, the first rotating shaft, the second rotating shaft, the third rotating shaft, the fourth rotating shaft and the fifth rotating shaft. Therefore, during operation, there is no need to fold or unfold the base bracket and the seat cushion bracket, the seat cushion bracket and the backrest bracket separately. Only any two components of the seat cushion bracket, the backrest bracket, the base bracket, the rear wheel bracket, the first connecting rod and the second connecting rod need to be operated to drive the entire wheelchair frame to fold or unfold, thereby making the operation simpler and more convenient. When the wheelchair frame needs to be folded, the rear wheel mounting part can move forward relative to the base bracket, thereby shortening the distance between the rear wheel mounting part and the front wheel mounting part, that is, shortening the distance between the rear wheel and the front wheel, thereby achieving a smaller packaging size, which is beneficial to reducing packaging and transportation costs, reducing the storage occupied size, and making the packaging, transportation and storage of the folding wheelchair more convenient.

[0008] According to some embodiments of the present invention, the rear wheel bracket is slidably connected to the base bracket, the lower end of the first connecting rod is rotationally connected to the rear end of the base bracket via the sixth rotating shaft, the lower end of the second connecting rod is rotationally connected to the front end of the rear wheel bracket via the fifth rotating shaft, the rear wheel bracket extends forward relative to the base bracket and makes the fifth rotating shaft located on the rear side of the sixth rotating shaft; the rear wheel bracket and the base bracket can move closer or farther relative to each other in the front-to-back direction, and make the wheelchair frame in a folded state or an unfolded state.

[0009] According to some embodiments of the present invention, the rear wheel bracket is rotatably connected to the base bracket via a seventh rotating shaft, the seventh rotating shaft is located on the upper side of the rear wheel mounting portion, the lower end of the first connecting rod is rotatably connected to the rear wheel bracket via the fifth rotating shaft, the fifth rotating shaft is located on the upper side of the seventh rotating shaft, the lower end of the second connecting rod is rotatably connected to the base bracket via the sixth rotating shaft, the sixth rotating shaft is located on the front side of the seventh rotating shaft; the rear wheel mounting portion can rotate forward or backward around the seventh rotating shaft relative to the base bracket, and make the wheelchair frame in a folded state or an unfolded state.

[0010] According to some embodiments of the present invention, the wheelchair frame also has a lying state. When the wheelchair frame switches from the unfolded state to the lying state, the rear wheel mounting portion can move backward relative to the base bracket, the seat cushion bracket rotates upward around the first rotating axis, and the upper end of the backrest bracket rotates backward around the first rotating axis away from the seat cushion bracket.

[0011] According to some embodiments of the present invention, it also includes a driving device, which is arranged between any two of the seat cushion bracket, the backrest bracket, the base bracket, the rear wheel bracket, the first connecting rod, and the second connecting rod, and can drive the two to move or rotate relative to each other; wherein the driving device can drive the rear wheel mounting part to rotate forward relative to the base bracket and make the wheelchair frame in a folded state; or, the driving device can drive the rear wheel mounting part to rotate backward relative to the base bracket and make the wheelchair frame in an unfolded state.

[0012] According to some embodiments of the present invention, it also includes a controller and a posture detection device, wherein the posture detection device is arranged on the wheelchair frame and can detect the inclination angle of the wheelchair frame, the driving device and the posture detection device are electrically connected to the controller, and the controller can control the operation of the driving device according to the signal feedback from the posture detection device, and adjust the inclination angle of the wheelchair frame.

[0013] According to some embodiments of the present invention, the driving device is installed between the base bracket and the rear wheel bracket, the front end of the driving device is rotatably connected to the base bracket via an eighth rotating shaft, and the rear end of the driving device is rotatably connected to the rear wheel mounting portion via a ninth rotating shaft. The driving device can drive the rear wheel bracket and the base bracket to rotate relative to each other via the seventh rotating shaft.

[0014] According to some embodiments of the present invention, it also includes a pedal and a second connecting rod assembly, the pedal is arranged on the front side of the base bracket, the second connecting rod assembly includes a third connecting rod, a fourth connecting rod and a fifth connecting rod; the upper end of the third connecting rod is rotatably connected to the base bracket through a tenth rotating shaft, and the lower end of the third connecting rod is rotatably connected to the pedal through an eleventh rotating shaft; the fourth connecting rod is located at the lower side of the third connecting rod, the upper end of the fourth connecting rod is rotatably connected to the base bracket through a twelfth rotating shaft, and the lower end of the fourth connecting rod is rotatably connected to the pedal through a thirteenth rotating shaft; the front end of the fifth connecting rod is connected to The fourth connecting rod is rotationally connected via the fourteenth rotating shaft, and the fourteenth rotating shaft is located between the twelfth rotating shaft and the thirteenth rotating shaft. The rear end of the fifth connecting rod is rotationally connected to the rear wheel bracket and is located on the upper side of the seventh rotating shaft. When the driving device drives the rear wheel bracket and the base bracket to rotate relative to each other via the seventh rotating shaft, the fifth connecting rod can pull the pedal downward and make the pedal, the third connecting rod and the fourth connecting rod fold with each other, or the fifth connecting rod can push the pedal upward and make the pedal, the third connecting rod and the fourth connecting rod unfold with each other.

[0015] According to some embodiments of the present invention, it also includes an armrest and a sixth connecting rod, the armrest is arranged above the seat cushion bracket, the rear end of the armrest is rotatably connected to the backrest bracket via a fifteenth rotating shaft, and the fifteenth rotating shaft is located above the first rotating shaft; the upper end of the sixth connecting rod is rotatably connected to the armrest via a sixteenth rotating shaft, and the lower end of the sixth connecting rod is rotatably connected to the seat cushion bracket via a seventeenth rotating shaft, and the seventeenth rotating shaft is located on the front side of the first rotating shaft.

[0016] A folding wheelchair according to an embodiment of the present invention is provided with a wheelchair folding structure according to any one of the above embodiments.

[0017] The folding wheelchair according to the embodiment of the present invention has at least the following beneficial effects:

[0018] In the folding wheelchair of the embodiment of the present invention, by setting the wheelchair folding structure of any of the above embodiments, the wheelchair folding structure only needs to operate any two components of the seat cushion bracket 200, the backrest bracket 300, the base bracket and the rear wheel bracket, the first connecting rod and the second connecting rod to drive the entire wheelchair frame to fold or unfold, thereby making the operation simpler and more convenient for users to operate. In addition, when the wheelchair folding structure is folded, the rear wheel mounting part can move forward relative to the base bracket, thereby reducing the distance between the rear wheel and the front wheel of the folding wheelchair, and thus achieving a smaller packaging size, which is conducive to reducing the packaging and transportation costs of the folding wheelchair, reducing the storage size of the folding wheelchair, and making the packaging, transportation and storage of the folding wheelchair more convenient.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 A schematic diagram of a wheelchair folding structure according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 Another perspective diagram of the folding structure of the wheelchair;

[0023] Figure 3 A schematic diagram of a wheelchair folding structure according to an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of a wheelchair folding structure in an unfolded state according to an embodiment of the present invention;

[0025] Figure 5 for Figure 4 A schematic diagram of the folding structure of the wheelchair;

[0026] Figure 6 for Figure 5 A schematic diagram of the folding structure of the wheelchair;

[0027] Figure 7 A schematic diagram of a folding structure of a wheelchair according to an embodiment of the present invention in a folded state;

[0028] Figure 8 A schematic diagram of a wheelchair folding structure in a lying position according to an embodiment of the present invention;

[0029] Fig. 9 A simplified schematic diagram of a wheelchair folding structure according to an embodiment of the present invention;

[0030] Fig.10 FIG. 4 is a simplified schematic diagram of a wheelchair folding structure according to another embodiment of the present invention.

[0031] Reference numerals:

[0032] Wheelchair frame 100, first rotating shaft 101, second rotating shaft 102, third rotating shaft 103, fourth rotating shaft 104, fifth rotating shaft 105, sixth rotating shaft 106, seventh rotating shaft 107, eighth rotating shaft 108, ninth rotating shaft 109, tenth rotating shaft 110, eleventh rotating shaft 111, twelfth rotating shaft 112, thirteenth rotating shaft 113, fourteenth rotating shaft 114, fifteenth rotating shaft 115, sixteenth rotating shaft 116, seventeenth rotating shaft 117;

[0033] A seat cushion bracket 200, a first connecting rod 210, a second connecting rod 220, a backrest bracket 300, a base bracket 400, a front wheel mounting portion 410, a front wheel 420, a rear wheel bracket 500, a rear wheel mounting portion 510, a rear wheel 520, a drive device 600, a pedal 700, a third connecting rod 710, a fourth connecting rod 720, a fifth connecting rod 730, an armrest 800, a sixth connecting rod 810, a connecting rod 900, and a mounting member 910. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0037] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0038] Reference Figures 1 to 10 An embodiment of the present invention provides a wheelchair folding structure, including a wheelchair frame 100 and a first connecting rod assembly, the wheelchair frame 100 includes a seat cushion bracket 200, a backrest bracket 300 and a base bracket 400, the backrest bracket 300 is rotatably mounted on the rear end of the seat cushion bracket 200 through a first rotating shaft 101, the base bracket 400 is arranged below the seat cushion bracket 200, the front end of the base bracket 400 has a front wheel mounting portion 410, the rear end of the base bracket 400 is movably mounted with a rear wheel bracket 500, and the rear wheel bracket 500 has a rear wheel mounting portion 510. The first connecting rod assembly includes a first connecting rod 210 and a second connecting rod 220 arranged between the base bracket 400 and the seat cushion bracket 200, the middle part of the first connecting rod 210 is rotatably connected to the middle part of the second connecting rod 220 through the second rotating shaft 102, the upper end of the first connecting rod 210 is rotatably connected to the seat cushion bracket 200 through the third rotating shaft 103, the third rotating shaft 103 is located on the front side of the first rotating shaft 101, the upper end of the second connecting rod 220 is rotatably connected to the backrest bracket 300 through the fourth rotating shaft 104, and the fourth rotating shaft 104 is located below the first rotating shaft 101; one of the lower ends of the first connecting rod 210 and the second connecting rod 220 is rotatably connected to the rear wheel bracket 500 through the fifth rotating shaft 105, and the other is rotatably connected to the base bracket 400 through the sixth rotating shaft 106.

[0039] In the wheelchair folding structure of the embodiment of the present invention, the rear wheel bracket 500 is moved at the rear end of the base bracket 400, and the seat cushion bracket 200, the backrest bracket 300, the base bracket 400 and the rear wheel bracket 500 are linked together through the first connecting rod 210, the second connecting rod 220, the first rotating shaft 101, the second rotating shaft 102, the third rotating shaft 103, the fourth rotating shaft 104, and the fifth rotating shaft 105, that is, the base bracket 400, the rear wheel bracket 500, the first connecting rod 210, and the second connecting rod 220 form a first group of four-bar linkages, and the seat cushion bracket 200, the backrest bracket 300, the first connecting rod 210, and the second connecting rod 220 form a first group of four-bar linkages, thereby, during operation, there is no need to separately operate the base bracket 400 and the seat cushion bracket 200, the seat cushion bracket 200 and the backrest bracket To fold or unfold the back support 300, it is only necessary to operate any two of the seat support 200, the backrest support 300, the base support 400 and the rear wheel support 500, the first connecting rod 210 and the second connecting rod 220 to drive the entire wheelchair frame 100 to fold or unfold, thereby making the operation simpler and more convenient. When the wheelchair frame 100 needs to be folded, the rear wheel mounting portion 510 can move forward relative to the base support 400, thereby reducing the distance between the rear wheel mounting portion 510 and the front wheel mounting portion 410, that is, reducing the distance between the rear wheel 520 and the front wheel 420, thereby achieving a smaller packaging size, which is beneficial to reducing packaging and transportation costs, reducing the storage space occupied, and making the packaging, transportation and storage of the folding wheelchair more convenient.

[0040] Specifically, refer to Figures 4 to 7 When the rear wheel mounting portion 510 moves forward relative to the base bracket 400, the first connecting rod 210 and the second connecting rod 220 can rotate around the second rotating shaft 102 and make the third rotating shaft 103 and the fourth rotating shaft 104 rotate downward around the second rotating shaft 102, that is, the first connecting rod 210 and the second connecting rod 220 are folded downward, thereby driving the seat cushion bracket 200 and the base bracket 400 to approach each other. At the same time, the fourth rotating shaft 104 will push the lower end of the backrest bracket 300 to rotate backward around the first rotating shaft 101, so that the upper end of the backrest bracket 300 rotates forward around the first rotating shaft 101 and approaches the seat cushion bracket 200, thereby making the backrest bracket 300 and the seat cushion bracket 200 fold with each other, thereby making the wheelchair frame 100 in a folded state.

[0041] When the rear wheel mounting portion 510 moves backward relative to the base bracket 400, the first connecting rod 210 and the second connecting rod 220 can rotate around the second rotating shaft 102 and make the third rotating shaft 103 and the fourth rotating shaft 104 rotate upward around the second rotating shaft 102, that is, the first connecting rod 210 and the second connecting rod 220 can be unfolded upward, thereby driving the seat cushion bracket 200 and the base bracket 400 to move away from each other. At the same time, the fourth rotating shaft 104 will pull the lower end of the backrest bracket 300 to rotate forward around the first rotating shaft 101, thereby making the upper end of the backrest bracket 300 rotate backward around the first rotating shaft 101 away from the seat cushion bracket 200, thereby making the backrest bracket 300 and the seat cushion bracket 200 unfold to each other, thereby making the wheelchair frame 100 in an unfolded state.

[0042] It is understandable that the front wheel mounting portion 410 on the base bracket 400 can be used to mount the front wheel 420, and the front wheel 420 can specifically adopt a universal wheel structure to serve as a steering mechanism of the wheelchair frame 100, and the present invention does not make specific limitations on this. The rear wheel mounting portion 510 on the rear wheel bracket 500 can be used to mount the rear wheel 520, and the rear wheel 520 can specifically adopt a fixed wheel structure. In addition, the rear wheel 520 can also adopt a driving wheel structure to serve as a power output mechanism of the wheelchair frame 100, and the present invention does not make specific limitations on this.

[0043] It is understandable that the base bracket 400, the rear wheel bracket 500, the cushion bracket 200, the backrest bracket 300, the first connecting rod 210 and the second connecting rod 220 are all independent one-piece structures, which can be an one-piece structure or a welded structure, and the present invention does not make specific restrictions on this. In addition, the base bracket 400, the rear wheel bracket 500, the cushion bracket 200, the backrest bracket 300, the first connecting rod 210 and the second connecting rod 220 can all be made of high-strength materials such as metal or carbon fiber.

[0044] Reference Fig.10 In some embodiments, the rear wheel bracket 500 is slidably connected to the base bracket 400, the lower end of the first connecting rod 210 is rotationally connected to the rear end of the base bracket 400 via the sixth rotating shaft 106, the lower end of the second connecting rod 220 is rotationally connected to the front end of the rear wheel bracket 500 via the fifth rotating shaft 105, the rear wheel bracket 500 extends forward relative to the base bracket 400 and makes the fifth rotating shaft 105 located on the rear side of the sixth rotating shaft 106; the rear wheel bracket 500 and the base bracket 400 can move closer or farther relative to each other in the front-to-back direction, and make the wheelchair frame 100 in a folded state or an unfolded state.

[0045] In the above structure, by slidingly connecting the rear wheel bracket 500 with the base bracket 400, the rear wheel bracket 500 and the base bracket 400 can move relative to each other in the front and rear directions. When the rear wheel bracket 500 moves close to the base bracket 400, the fifth rotating shaft 105 and the sixth rotating shaft 106 will rotate upward around the second rotating shaft 102 and move away from each other, and the third rotating shaft 103 and the first rotating shaft 101 will rotate downward around the second rotating shaft 102 and move away from each other. At this time, the first connecting rod 210 and the second connecting rod 220 are folded downward, thereby being able to drive the seat cushion bracket 200 and the base bracket 400 to approach each other. At the same time, the fourth rotating shaft 104 will push the lower end of the backrest bracket 300 to rotate backward around the first rotating shaft 101, so that the upper end of the backrest bracket 300 rotates forward around the first rotating shaft 101 and approaches the seat cushion bracket 200, thereby causing the backrest bracket 300 and the seat cushion bracket 200 to fold with each other, thereby allowing the wheelchair frame 100 to be in a folded state. When the rear wheel bracket 500 moves away from the base bracket 400, the fifth rotating shaft 105 and the sixth rotating shaft 106 will rotate downward around the second rotating shaft 102 and approach each other, and the third rotating shaft 103 and the first rotating shaft 101 will rotate upward around the second rotating shaft 102 and approach each other. At this time, the first connecting rod 210 and the second connecting rod 220 will expand upward, thereby driving the seat cushion bracket 200 and the base bracket 400 to expand away from each other. At the same time, the fourth rotating shaft 104 will pull the lower end of the backrest bracket 300 to rotate forward around the first rotating shaft 101, so that the upper end of the backrest bracket 300 rotates backward around the first rotating shaft 101 away from the seat cushion bracket 200, thereby making the backrest bracket 300 and the seat cushion bracket 200 expand with each other, thereby making the wheelchair frame 100 in an expanded state. Therefore, the above structure can facilitate the folding and unfolding of the wheelchair frame 100, and when the wheelchair frame 100 needs to be folded, the rear wheel mounting portion 510 can move forward relative to the base bracket 400, thereby reducing the distance between the rear wheel mounting portion 510 and the front wheel mounting portion 410, that is, reducing the distance between the rear wheel 520 and the front wheel 420, thereby achieving a smaller packaging size, which is beneficial to reducing packaging and transportation costs, reducing the storage space, and making the packaging, transportation and storage of the folding wheelchair more convenient.

[0046] Reference Figures 1 to 9 In some embodiments, the rear wheel bracket 500 is rotationally connected to the base bracket 400 via the seventh rotating shaft 107, the seventh rotating shaft 107 is located on the upper side of the rear wheel mounting portion 510, the lower end of the first connecting rod 210 is rotationally connected to the rear wheel bracket 500 via the fifth rotating shaft 105, the fifth rotating shaft 105 is located on the upper side of the seventh rotating shaft 107, the lower end of the second connecting rod 220 is rotationally connected to the base bracket 400 via the sixth rotating shaft 106, the rear wheel mounting portion 510 can rotate forward or backward around the seventh rotating shaft 107 relative to the base bracket 400, and the wheelchair frame 100 is in a folded state or an unfolded state.

[0047] In the above structure, the rear wheel bracket 500 is rotatably connected to the base bracket 400, so that the rear wheel mounting portion 510 rotates forward or backward relative to the base bracket 400 around the seventh rotation axis 107. When the rear wheel mounting portion 510 rotates forward and approaches the base bracket 400, the fifth rotation axis 105 rotates backward, thereby causing the fifth rotation axis 105 and the sixth rotation axis 106 to rotate upward around the second rotation axis 102 and move away from each other, and the third rotation axis 103 and the first rotation axis 101 rotate downward around the second rotation axis 102 and move away from each other. The first connecting rod 210 and the second connecting rod 220 fold away from each other, and the seat cushion bracket 200 and the base bracket 400 are moved closer to each other. At the same time, the fourth rotating shaft 104 pushes the lower end of the backrest bracket 300 to rotate backward around the first rotating shaft 101, so that the upper end of the backrest bracket 300 rotates forward around the first rotating shaft 101 and approaches the seat cushion bracket 200, thereby making the backrest bracket 300 and the seat cushion bracket 200 fold with each other, so that the wheelchair frame 100 can be in a folded state. When the rear wheel bracket 500 rotates backwards away from the base bracket 400, the fifth rotating shaft 105 rotates forward, so that the fifth rotating shaft 105 and the sixth rotating shaft 106 will rotate downward around the second rotating shaft 102 and approach each other, and the third rotating shaft 103 and the first rotating shaft 101 will rotate upward around the second rotating shaft 102 and approach each other. At this time, the first connecting rod 210 and the second connecting rod 220 are unfolded upward, thereby being able to drive the seat cushion bracket 200 and the base bracket 400 to move away from each other and unfold. At the same time, the fourth rotating shaft 104 will pull the lower end of the backrest bracket 300 to rotate forward around the first rotating shaft 101, so that the upper end of the backrest bracket 300 rotates backward around the first rotating shaft 101 away from the seat cushion bracket 200, thereby making the backrest bracket 300 and the seat cushion bracket 200 unfold to each other, thereby making the wheelchair frame 100 in an unfolded state. Therefore, the above structure can facilitate the folding and unfolding of the wheelchair frame 100, and when the wheelchair frame 100 needs to be folded, the rear wheel mounting portion 510 can be rotated forward relative to the base bracket 400, thereby reducing the distance between the rear wheel mounting portion 510 and the front wheel mounting portion 410, that is, reducing the distance between the rear wheel 520 and the front wheel 420, thereby achieving a smaller packaging size, which is beneficial to reducing packaging and transportation costs, reducing the storage space, and making the packaging, transportation and storage of the folding wheelchair more convenient.

[0048] It can be understood that in order to avoid the self-locking phenomenon between the first connecting rod 210 and the rear wheel bracket 500, which causes the first connecting rod 210 to be unable to push the fifth rotating shaft 105 to rotate backward around the seventh rotating shaft 107, an angle a can be set between the line between the second rotating shaft 102 and the fifth rotating shaft 105 and the line between the seventh rotating shaft 107 and the fifth rotating shaft 105, 0°<a<180°.

[0049] Reference Figures 1 to 9In some embodiments, the wheelchair frame 100 also has a lying state. When the wheelchair frame 100 switches from the unfolded state to the lying state, the rear wheel mounting portion 510 can move backward relative to the base bracket 400, the seat cushion bracket 200 rotates upward around the first rotating axis 101, and the upper end of the backrest bracket 300 rotates backward around the first rotating axis 101 away from the seat cushion bracket 200.

[0050] In the above structure, when the wheelchair frame 100 switches from the unfolded state to the lying state, the front end of the cushion bracket 200 can be lifted upward, and the upper end of the backrest bracket 300 rotates backward relative to the cushion bracket 200 around the first rotating shaft 101, so that the angle between the upper end of the backrest bracket 300 and the cushion bracket 200 can be further increased, thereby facilitating the user to lie on the wheelchair, making the user more comfortable, and helping to improve the user's experience. And because when the wheelchair frame 100 is in the lying state, the rear wheel mounting part 510 can continue to move backward relative to the base bracket 400, thereby further increasing the distance between the rear wheel mounting part 510 and the front wheel mounting part 410, and thus the center of gravity of the wheelchair frame 100 can be adjusted backward, which helps to reduce the risk of the wheelchair frame 100 tipping over in the lying state.

[0051] Specifically, in the unfolded state, when the rear wheel mounting portion 510 continues to move backward relative to the base bracket 400, the first connecting rod 210 and the second connecting rod 220 can continue to rotate around the second rotating shaft 102 and make the third rotating shaft 103 and the fourth rotating shaft 104 rotate upward around the second rotating shaft 102, that is, the first connecting rod 210 and the second connecting rod 220 are unfolded upward, thereby driving the seat cushion bracket 200 and the base bracket 400 to move away from each other. At the same time, the fourth rotating shaft 104 will pull the lower end of the backrest bracket 300 to rotate forward around the first rotating shaft 101, so that the upper end of the backrest bracket 300 rotates backward around the first rotating shaft 101 away from the seat cushion bracket 200, thereby further increasing the angle between the upper end of the backrest bracket 300 and the seat cushion bracket 200, thereby allowing the wheelchair frame 100 to be in a lying state.

[0052] Reference Figure 8 In some embodiments, in order to enable the seat cushion support 200 to be lifted upward in the lying state, the length of the first connecting rod 210 can be set to be longer than the second connecting rod 220, thereby enabling the user to obtain a more comfortable experience.

[0053] Reference Figures 1 to 9In some embodiments, a driving device 600 is further included. The driving device 600 is disposed between the base support 400 and the rear wheel support 500 and can drive the two to move or rotate relative to each other. The driving device 600 can drive the rear wheel mounting portion 510 to rotate forward relative to the base support 400 and put the wheelchair frame 100 in a folded state; or the driving device 600 can drive the rear wheel mounting portion 510 to rotate backward relative to the base support 400 and put the wheelchair frame 100 in an unfolded state.

[0054] By adopting the above structure and setting up the driving device 600, the folding and unfolding of the wheelchair frame 100 can be made more convenient and labor-saving. Compared with the existing technology that requires the base and the seat cushion, or the seat cushion and the backrest to be folded or unfolded separately, the existing technology requires the configuration of multiple driving devices 600 to drive the folding or unfolding between the base and the seat cushion, or the seat cushion and the backrest respectively. In the embodiment of the present application, since the seat cushion bracket 200, the backrest bracket 300, the base bracket 400 and the rear wheel bracket 500 are interconnected, the folding and unfolding of the wheelchair can be achieved through a set of driving devices 600, which not only helps to reduce costs, but also makes the operation simpler and more convenient.

[0055] It is understandable that the driving device 200 may specifically adopt a manual driving structure or an electric driving structure, and the present invention does not make any specific limitation on this.

[0056] It can be understood that since the above structure links the seat cushion bracket 200, the backrest bracket 300, the base bracket 400 and the rear wheel bracket 500 through the first connecting rod 210, the second connecting rod 220, the first rotating shaft 101, the second rotating shaft 102, the third rotating shaft 103, the fourth rotating shaft 104 and the fifth rotating shaft 105, the base bracket 400, the rear wheel bracket 500, the first connecting rod 210 and the second connecting rod 220 form a first group of four-bar linkages, and the seat cushion bracket 200, the backrest bracket 300, the first connecting rod 210 and the second connecting rod 220 form a first group of four-bar linkages. Therefore, in addition to being installed between the base bracket 400 and the rear wheel bracket 500, the driving device 600 can also be installed between any two of the base bracket 400, the rear wheel bracket 500, the seat cushion bracket 200, the backrest bracket 300, the first connecting rod 210 and the second connecting rod 220. For example, the driving device 600 can be installed between the first connecting rod 210 and the second connecting rod 220 and can drive the two to rotate relative to each other. At this time, the third rotating shaft 103 and the fourth rotating shaft 104 can move closer to or away from each other, and the fifth rotating shaft 105 and the sixth rotating shaft 106 can also move closer to or away from each other. As a result, the first connecting rod 210 and the second connecting rod 220 can rotate around the second rotating shaft 102 and unfold upward, which can drive the seat cushion bracket 200 and the base bracket 400 to move away from each other and unfold. At the same time, the fifth rotating shaft 105 will pull the rear wheel bracket 500 to rotate and make the rear wheel mounting part 510 rotate backward around the seventh rotating shaft 107 relative to the base bracket 400, and the fourth rotating shaft 104 will pull the lower end of the backrest bracket 300 to rotate forward around the first rotating shaft 101, so that the backrest bracket 300 and the seat cushion bracket 200 unfold each other, thereby making the wheelchair frame 100 in an unfolded state. Alternatively, the first connecting rod 210 and the second connecting rod 220 can rotate around the second rotating shaft 102 and fold downward, thereby driving the seat cushion bracket 200 and the base bracket 400 to fold close to each other. At the same time, the fifth rotating shaft 105 will push the rear wheel bracket 500 to rotate and make the rear wheel mounting portion 510 rotate forward around the seventh rotating shaft 107 relative to the base bracket 400. The fourth rotating shaft 104 will push the lower end of the backrest bracket 300 to rotate backward around the first rotating shaft 101, thereby making the backrest bracket 300 and the seat cushion bracket 200 fold together, thereby making the wheelchair frame 100 in a folded state.

[0057] The driving device 600 can also be installed between the seat cushion bracket 200 and the backrest bracket 300 and can drive the two to rotate relative to each other. At this time, it can also drive the third rotating shaft 103 and the fourth rotating shaft 104 to be relatively close to or away from each other, so that the first connecting rod 210 and the second connecting rod 220 can rotate around the second rotating shaft 102 and unfold upward or fold downward, so that the wheelchair frame 100 is in an unfolded state or a folded state.

[0058] The driving device 600 can also be installed between the backrest bracket 300 and the second connecting rod 220 and can drive the two to rotate relative to each other around the fourth rotating shaft 104. When the backrest bracket 300 and the second connecting rod 220 rotate in a direction approaching each other, the upper end of the backrest bracket 300 will move around the first rotating shaft 101 to approach the seat cushion bracket 200, and the fourth rotating shaft 104 will move around the first rotating shaft 101 away from the seat cushion bracket 200, so that the backrest bracket 300 and the seat cushion bracket 200 are folded with each other, and the third rotating shaft 103 and the fourth rotating shaft 104 are relatively far away from each other. At this time, the first connecting rod 210 and the second connecting rod 220 can rotate around the second rotating shaft 102 and fold downward, thereby making the seat cushion bracket 200 and the base bracket 400 close to each other and folding, and the fifth rotating shaft 105 will also push the rear wheel bracket 500 to rotate and make the rear wheel mounting part 510 rotate forward around the seventh rotating shaft 107 relative to the base bracket 400, thereby making the wheelchair frame 100 in a folded state. When the backrest bracket 300 and the second connecting rod 220 rotate in the direction away from each other, the upper end of the backrest bracket 300 will move around the first rotating shaft 101 away from the seat cushion bracket 200, and the fourth rotating shaft 104 will move around the first rotating shaft 101 close to the seat cushion bracket 200, so that the backrest bracket 300 and the seat cushion bracket 200 are unfolded with each other, and the third rotating shaft 103 and the fourth rotating shaft 104 are relatively close. At this time, the first connecting rod 210 and the second connecting rod 220 can rotate around the second rotating shaft 102 and unfold upward, so that the wheelchair frame 100 can be in an unfolded state.

[0059] In some embodiments, a controller and a posture detection device are also included. The posture detection device is arranged on the wheelchair frame 100 and can detect the inclination angle of the wheelchair frame 100. The driving device 600 and the posture detection device are electrically connected to the controller. The controller can control the operation of the driving device 600 according to the signal feedback from the posture detection device, and adjust the inclination angle of the wheelchair frame 100.

[0060] By adopting the above structure, the inclination angle of the wheelchair frame 100 is detected by the posture detection device. The inclination angle of the wheelchair frame 100 specifically refers to the inclination angle of the wheelchair frame 100 relative to the horizontal plane. The controller can determine whether the position of the wheelchair frame 100 is uphill or downhill according to the angle signal fed back by the posture detection device, and control the operation of the drive device 600 according to the analysis result, so as to adjust the rear wheel mounting part 510 to rotate around the seventh rotation axis 107 by a certain angle, and then adjust the inclination angle of the wheelchair frame 100, so that the seat cushion bracket 200 remains in a horizontal state, and then the seat cushion bracket 200 remains in a horizontal state when the wheelchair is going uphill or downhill, that is, it can achieve a self-balancing effect, so that the user can maintain a comfortable sitting posture, which is conducive to improving the user's experience.

[0061] The posture detection device can detect the tilt angle of the wheelchair frame 100, and specifically can detect the angle between any component of the wheelchair frame 100 and the horizontal plane, such as the seat support 200, the backrest support 300, the base support 400, the rear wheel support 500, the first connecting rod 210, and the second connecting rod 220. The posture detection device can specifically adopt a detection structure such as a level or a six-axis gyroscope, which is not specifically limited in the present invention.

[0062] During the specific adjustment process, when the wheelchair frame 100 is in an uphill state, the front end of the seat cushion bracket 200 is lifted upward relative to the first rotating shaft 101. At this time, the controller can control the driving device 600 to drive the rear wheel mounting part 510 to rotate forward a certain angle around the seventh rotating shaft 107, and the fifth rotating shaft 105 can rotate backward and upward around the seventh rotating shaft 107, and make the third rotating shaft 103 at the upper end of the first connecting rod 210 rotate forward and downward around the second rotating shaft 102, thereby pulling the seat cushion bracket 100 to rotate downward around the first rotating shaft 101, so that the seat cushion bracket 200 can maintain a horizontal state when in the uphill state.

[0063] When the wheelchair frame 100 is in a downhill state, the front end of the seat cushion bracket 200 tilts downward relative to the first rotating shaft 101. At this time, the controller can control the driving device 600 to drive the rear wheel mounting part 510 to rotate backward at a certain angle around the seventh rotating shaft 107, and the fifth rotating shaft 105 can rotate forward and downward around the seventh rotating shaft 107, and make the third rotating shaft 103 at the upper end of the first connecting rod 210 rotate backward and upward around the second rotating shaft 102, thereby pushing the seat cushion bracket 100 to rotate upward around the first rotating shaft 101, so that the seat cushion bracket 200 maintains a horizontal state when in the uphill state.

[0064] It is understandable that the posture detection device can be specifically installed on the seat cushion bracket 200 , and in addition, it can also be installed at other positions of the wheelchair frame 100 . The present invention does not make specific limitations on this, and it only needs to be able to detect the tilt angle of the wheelchair frame 100 .

[0065] Reference Figures 1 to 9 In some embodiments, the driving device 600 is installed between the base bracket 400 and the rear wheel bracket 500, the front end of the driving device 600 is rotatably connected to the base bracket 400 through the eighth rotating shaft 108, and the rear end of the driving device 600 is rotatably connected to the rear wheel mounting portion 510 through the ninth rotating shaft 109. The driving device 600 can drive the rear wheel bracket 500 and the base bracket 400 to rotate relative to each other through the seventh rotating shaft 107.

[0066] By adopting the above structure, the driving device 600 is directly arranged between the base bracket 400 and the rear wheel bracket 500, so that the front end of the driving device 600 is rotationally connected to the base bracket 400, and the rear end is rotationally connected to the rear wheel bracket 500, thereby being able to flexibly drive the rear wheel bracket 500 and the base bracket 400 to rotate relative to each other around the seventh rotation axis 107.

[0067] It is understandable that the above-mentioned driving device 600 can specifically adopt a linear driving mechanism such as an electric push rod or a cylinder, and the present invention does not make specific limitations on this. Of course, in addition to adopting the above-mentioned structure, the driving device 600 can also directly drive the seventh rotating shaft 107 to rotate. In this case, the driving device 600 can also adopt a rotating driving mechanism such as a motor or a rotating cylinder, and the present invention does not make specific limitations on this.

[0068] Reference Figures 1 to 9 In some embodiments, a pedal 700 and a second connecting rod assembly are further included. The pedal 700 is arranged on the front side of the base bracket 400. The second connecting rod assembly includes a third connecting rod 710, a fourth connecting rod 720 and a fifth connecting rod 730. The upper end of the third connecting rod 710 is rotatably connected to the base bracket 400 through the tenth rotating shaft 110, and the lower end of the third connecting rod 710 is rotatably connected to the pedal 700 through the eleventh rotating shaft 111. The fourth connecting rod 720 is located at the lower side of the third connecting rod 710. The upper end of the fourth connecting rod 720 is rotatably connected to the base bracket 400 through the twelfth rotating shaft 112, and the lower end of the fourth connecting rod 720 is rotatably connected to the pedal 700 through the thirteenth rotating shaft 113. The fifth connecting rod 730 The front end is rotationally connected to the fourth connecting rod 720 through the fourteenth rotating shaft 114, and the fourteenth rotating shaft 114 is located between the twelfth rotating shaft 112 and the thirteenth rotating shaft 113. The rear end of the fifth connecting rod 730 is rotationally connected to the rear wheel bracket 500 and is located on the upper side of the seventh rotating shaft 107. When the driving device 600 drives the rear wheel bracket 500 and the base bracket 400 to rotate relative to each other through the seventh rotating shaft 107, the fifth connecting rod 730 can pull the pedal 700 to move downward and make the pedal 700, the third connecting rod 710, and the fourth connecting rod 720 fold with each other, or the fifth connecting rod 730 can push the pedal 700 to move upward and make the pedal 700, the third connecting rod 710, and the fourth connecting rod 720 unfold with each other.

[0069] In the above structure, the setting of the pedal 700 can enable the user to obtain a more comfortable use experience, and the setting of the second connecting rod assembly can link the pedal 700 with the base bracket 400 and the rear wheel bracket 500, so that the pedal 700, the third connecting rod 710, the fourth connecting rod 720, and the base bracket 400 form a third four-bar linkage mechanism, and the base bracket 400, the rear wheel bracket 500, the fourth connecting rod 720, and the fifth connecting rod 730 form a fourth four-bar linkage mechanism, and then the pedal 700, the base bracket 400, the rear wheel bracket 500, the seat cushion bracket 200, and the backrest bracket 300 can be linked together, thereby, the wheelchair can be folded and unfolded through a set of driving devices 600, which not only helps to reduce costs, but also makes the operation simpler and more convenient.

[0070] Specifically, when the rear wheel bracket 500 and the base bracket 400 rotate relative to each other through the seventh rotation axis 107, and the rear wheel mounting portion 510 rotates forward around the seventh rotation axis 107, the backrest bracket 300, the seat cushion bracket 200 and the base bracket 400 can be folded with each other. At the same time, the upper end of the rear wheel bracket 500 will rotate backward and drive the fifth connecting rod 730 to move backward, and the fifth connecting rod 730 will pull the fourth connecting rod 720 to rotate backward and downward around the twelfth rotation axis 112, thereby driving the pedal 700 to rotate downward, and driving the third connecting rod 710 to rotate backward and downward around the tenth rotation axis 110, and at the same time, the front end of the pedal 700 rotates around the eleventh rotation axis 111 and approaches the third connecting rod 710, so that the pedal 700 will fold with the third connecting rod 710 and the fourth connecting rod 720, thereby making the wheelchair frame 100 in a folded state. When the rear wheel bracket 500 and the base bracket 400 rotate relative to each other through the seventh rotating shaft 107, and the rear wheel mounting part 510 rotates backward around the seventh rotating shaft 107, the backrest bracket 300, the cushion bracket 200 and the base bracket 400 can be unfolded with each other. At the same time, the upper end of the rear wheel bracket 500 will rotate backward and drive the fifth connecting rod 730 to move forward, and the fifth connecting rod 730 will push the fourth connecting rod 720 to rotate forward and upward around the twelfth rotating shaft 112, thereby driving the pedal 700 to move forward and upward, and driving the third connecting rod 710 to rotate upward around the tenth rotating shaft 110, and at the same time, the front end of the pedal 700 rotates around the eleventh rotating shaft 111 and moves away from the third connecting rod 710, so that the pedal 700 will be unfolded with the third connecting rod 710 and the fourth connecting rod 720, thereby making the wheelchair frame 100 in an unfolded state.

[0071] It is understandable that the foot pedal 700 may be an integrated structure, and the foot pedal 700 may be a plastic part or a metal part, and the third connecting rod 710 and the fourth connecting rod 720 may be metal parts, which is not specifically limited in the present invention.

[0072] Reference Figure 8When the wheelchair frame 100 also has a lying state, in the process of switching from the unfolded state to the lying state, the upper end of the rear wheel bracket 500 will continue to rotate forward and further push the fifth connecting rod 730 to move forward, and the fifth connecting rod 730 further pushes the fourth connecting rod 720 to rotate forward and upward around the twelfth rotating shaft 112, thereby being able to push the pedal 700 to move forward and upward, and the third connecting rod 710 will also rotate forward and upward around the tenth rotating shaft 110. During this process, the pedal 700 and the third connecting rod 710 rotate away from each other around the eleventh rotating shaft, thereby making the pedal 700 unfold with the third connecting rod 710 and the fourth connecting rod 720, and making the front end of the pedal 700 tilt upward, thereby enabling the user to have a more comfortable lying experience.

[0073] Reference Figures 1 to 9 In some embodiments, the rear end of the fifth connecting rod 730 is connected to the fifth rotating shaft 105 and is rotatably connected to the rear wheel bracket 500 through the fifth rotating shaft 105.

[0074] In the above structure, the fifth connecting rod 730 is directly connected to the rear wheel bracket 500 through the fifth rotating shaft 105, thereby avoiding the need to set an additional rotating shaft structure between the fifth connecting rod 730 and the rear wheel bracket 500, thereby helping to simplify the structure of the wheelchair frame 100, making the structure of the wheelchair frame 100 simpler.

[0075] Reference Figures 1 to 9 In some embodiments, there are two groups of base brackets 400, which are arranged opposite to each other, and a group of first connecting rod assemblies are provided between each group of base brackets 400 and the cushion bracket 200. A connecting rod 900 is connected between the two groups of base brackets 400, and the driving device 600 and the fifth connecting rod 730 are both located between the two groups of first connecting rod assemblies. The driving device 600, the third connecting rod 710, and the fourth connecting rod 720 are all rotatably connected to the two groups of base brackets 400 through the connecting rod 900. The front end of the fifth connecting rod 730 is disposed below the connecting rod 900 and is rotatably connected to the fourth connecting rod 720.

[0076] By adopting the above structure, the two groups of base brackets 400 can better support the cushion bracket 200, making the structure of the wheelchair frame 100 more balanced and stable. In addition, by locating the driving device 600 and the fifth connecting rod 730 between the two groups of first connecting rod assemblies, the driving device 600, the third connecting rod 710, and the fourth connecting rod 720 are all rotatably connected to the two groups of base brackets 400 through the connecting rod 900, thereby making it possible to more fully utilize the space between the two groups of base brackets 400 below the cushion bracket 200, and also making the structure of the wheelchair frame 100 more compact and stable.

[0077] It can be understood that in order to facilitate the connection between the driving device 600, the third connecting rod 710, the fourth connecting rod 720 and the connecting rod 900, a mounting member 910 can be mounted on the connecting rod 900, and three mounting positions are set on the mounting member 910 to respectively rotatably connect with the driving device 600, the third connecting rod 710, and the fourth connecting rod 720.

[0078] Reference Figures 3 to 8 In some embodiments, it also includes an armrest 800 and a sixth connecting rod 810. The armrest 800 is arranged above the seat cushion bracket 200. The rear end of the armrest 800 is rotatably connected to the backrest bracket 300 through the fifteenth rotating shaft 115, and the fifteenth rotating shaft 115 is located above the first rotating shaft 101; the upper end of the sixth connecting rod 810 is rotatably connected to the armrest 800 through the sixteenth rotating shaft 116, and the lower end of the sixth connecting rod 810 is rotatably connected to the seat cushion bracket 200 through the seventeenth rotating shaft 117, and the seventeenth rotating shaft 117 is located on the front side of the first rotating shaft 101.

[0079] In the above structure, the armrest 800 can support the user's arm, so that the user can use it more comfortably. The setting of the sixth connecting rod 810 can link the armrest 800, the cushion bracket 200, and the backrest bracket 300, so that the sixth connecting rod 810, the armrest 800, the cushion bracket 200, and the backrest bracket 300 form a fifth group of four-bar linkages, and then the armrest 800, the cushion bracket 200, the backrest bracket 300, the base bracket 400 and the rear wheel bracket 500 can be linked together, so that the wheelchair can be folded and unfolded through a set of driving devices 600, which is not only conducive to reducing costs, but also makes the operation simpler and more convenient.

[0080] Specifically, when the wheelchair frame 100 needs to be folded, the upper end of the backrest bracket 300 rotates forward around the first rotation axis 101 and approaches the cushion bracket 200. During this process, the backrest bracket 300 drives the fifteenth rotation axis 115 to rotate forward, thereby causing the armrest 800 to move forward and push the sixth connecting rod 810 through the sixteenth rotation axis 116 to rotate forward around the seventeenth rotation axis 117 and approaches the cushion bracket 200. At this time, the armrest 800 will also move downward synchronously and approaches the cushion bracket 200, thereby enabling folding between the armrest 800, the backrest bracket 300 and the cushion bracket 200. When the wheelchair frame 100 needs to be unfolded, the upper end of the backrest bracket 300 rotates backward around the first rotation axis 101 and approaches the cushion bracket 200. During this process, the backrest bracket 300 drives the fifteenth rotation axis 115 to rotate backward, thereby causing the armrest 800 to move backward and pull the sixth connecting rod 810 through the sixteenth rotation axis 116 to rotate backward around the seventeenth rotation axis 117 and approaches the cushion bracket 200. At this time, the armrest 800 will also move upward synchronously away from the cushion bracket 200, thereby enabling the armrest 800, the backrest bracket 300 and the cushion bracket 200 to be unfolded.

[0081] It can be understood that the above-mentioned first rotating shaft 101, second rotating shaft 102, third rotating shaft 103, fourth rotating shaft 104, fifth rotating shaft 105, sixth rotating shaft 106, seventh rotating shaft 107, eighth rotating shaft 108, ninth rotating shaft 109, tenth rotating shaft 110, eleventh rotating shaft 111, twelfth rotating shaft 112, thirteenth rotating shaft 113, fourteenth rotating shaft 114, fifteenth rotating shaft 115, sixteenth rotating shaft 116, and seventeenth rotating shaft 117 can all adopt a pin structure. In addition, in order to make the wheelchair frame 100 more stable and firm in the unfolded state or the folded state, a rotation limiting mechanism can be set at each rotating shaft.

[0082] An embodiment of the present invention further provides a folding wheelchair, which is provided with the wheelchair folding structure of any one of the above embodiments.

[0083] In the folding wheelchair of the embodiment of the present invention, by setting the wheelchair folding structure of any of the above embodiments, the wheelchair folding structure only needs to operate any two of the seat cushion bracket 200, the backrest bracket 300, the base bracket 400 and the rear wheel bracket 500, the first connecting rod 210 and the second connecting rod 220 to drive the entire wheelchair frame 100 to fold or unfold, thereby making the operation simpler and more convenient for users to operate. In addition, when the wheelchair folding structure is folded, the rear wheel mounting portion 510 can move forward relative to the base bracket 400, thereby reducing the distance between the rear wheel 520 and the front wheel 420 of the folding wheelchair, thereby achieving a smaller packaging size, which is conducive to reducing the packaging and transportation costs of the folding wheelchair, reducing the storage occupied size of the folding wheelchair, and making the packaging, transportation and storage of the folding wheelchair more convenient.

[0084] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A wheelchair folding structure, characterized in that: include: A wheelchair frame (100) comprises a seat cushion support (200), a backrest support (300) and a base support (400), wherein the backrest support (300) is rotatably mounted on the rear end of the seat cushion support (200) via a first rotating shaft (101), the base support (400) is arranged below the seat cushion support (200), the front end of the base support (400) is provided with a front wheel mounting portion (410), the rear end of the base support (400) is movably mounted with a rear wheel support (500), and the rear wheel support (500) is provided with a rear wheel mounting portion (510); The first connecting rod assembly comprises a first connecting rod (210) and a second connecting rod (220) which are arranged between the base support (400) and the seat cushion support (200), wherein the middle portion of the first connecting rod (210) and the middle portion of the second connecting rod (220) are rotatably connected via a second rotating shaft (102), and the upper end of the first connecting rod (210) is rotatably connected to the seat cushion support (200) via a third rotating shaft (103), and the third rotating shaft (103) is located at the first rotating shaft (102). 1), the upper end of the second connecting rod (220) is rotatably connected to the backrest bracket (300) via a fourth rotating shaft (104), and the fourth rotating shaft (104) is located below the first rotating shaft (101); one of the lower ends of the first connecting rod (210) and the second connecting rod (220) is rotatably connected to the rear wheel bracket (500) via a fifth rotating shaft (105), and the other is rotatably connected to the base bracket (400) via a sixth rotating shaft (106); The rear wheel mounting portion (510) can move forward relative to the base bracket (400) and place the wheelchair frame (100) in a folded state; or, the rear wheel mounting portion (510) can move backward relative to the base bracket (400) and place the wheelchair frame (100) in an unfolded state.

2. The wheelchair folding structure according to claim 1, characterized in that: The rear wheel bracket (500) is slidably connected to the base bracket (400), the lower end of the first connecting rod (210) is rotationally connected to the rear end of the base bracket (400) via the sixth rotating shaft (106), the lower end of the second connecting rod (220) is rotationally connected to the front end of the rear wheel bracket (500) via the fifth rotating shaft (105), and the rear wheel bracket (500) extends forward relative to the base bracket (400) so that the fifth rotating shaft (105) is located at the rear side of the sixth rotating shaft (106); The rear wheel bracket (500) and the base bracket (400) can move relatively toward or away from each other in the front-rear direction, and enable the wheelchair frame (100) to be in a folded state or an unfolded state.

3. The wheelchair folding structure according to claim 1, characterized in that: The rear wheel bracket (500) is rotationally connected to the base bracket (400) via the seventh rotating shaft (107), the seventh rotating shaft (107) is located on the upper side of the rear wheel mounting portion (510), the lower end of the first connecting rod (210) is rotationally connected to the rear wheel bracket (500) via the fifth rotating shaft (105), the fifth rotating shaft (105) is located on the upper side of the seventh rotating shaft (107), the lower end of the second connecting rod (220) is rotationally connected to the base bracket (400) via the sixth rotating shaft (106), the sixth rotating shaft (106) is located on the front side of the seventh rotating shaft (107); The rear wheel mounting portion (510) can rotate forward or backward relative to the base bracket (400) around the seventh rotating shaft (107), and enables the wheelchair frame (100) to be in a folded state or an unfolded state.

4. The folding structure of a wheelchair according to any one of claims 1 to 3, characterized in that: The wheelchair frame (100) also has a lying state. When the wheelchair frame (100) switches from the unfolded state to the lying state, the rear wheel mounting portion (510) can move backward relative to the base bracket (400), the seat cushion bracket (200) rotates upward around the first rotating shaft (101), and the upper end of the backrest bracket (300) rotates backward around the first rotating shaft (101) away from the seat cushion bracket (200).

5. The wheelchair folding structure according to claim 3, characterized in that: The invention also comprises a driving device (600), wherein the driving device (600) is arranged between any two of the seat cushion bracket (200), the backrest bracket (300), the base bracket (400), the rear wheel bracket (500), the first connecting rod (210), and the second connecting rod (220), and is capable of driving the two to move or rotate relative to each other; The driving device (600) is capable of driving the rear wheel mounting portion (510) to rotate forward relative to the base bracket (400) and place the wheelchair frame (100) in a folded state; or, the driving device (600) is capable of driving the rear wheel mounting portion (510) to rotate backward relative to the base bracket (400) and place the wheelchair frame (100) in an unfolded state.

6. The wheelchair folding structure according to claim 5, characterized in that: It also includes a controller and a posture detection device, wherein the posture detection device is arranged on the wheelchair frame (100) and can detect the inclination angle of the wheelchair frame (100), the driving device (600) and the posture detection device are both electrically connected to the controller, and the controller can control the operation of the driving device (600) according to the signal fed back by the posture detection device, and adjust the inclination angle of the wheelchair frame (100).

7. The wheelchair folding structure according to claim 5, characterized in that: The driving device (600) is installed between the base support (400) and the rear wheel support (500); the front end of the driving device (600) is rotationally connected to the base support (400) via an eighth rotating shaft (108); the rear end of the driving device (600) is rotationally connected to the rear wheel mounting portion (510) via a ninth rotating shaft (109); and the driving device (600) can drive the rear wheel support (500) and the base support (400) to rotate relative to each other via the seventh rotating shaft (107).

8. The wheelchair folding structure according to claim 3, characterized in that: It also includes a pedal (700) and a second connecting rod assembly, wherein the pedal (700) is arranged on the front side of the base bracket (400), and the second connecting rod assembly includes a third connecting rod (710), a fourth connecting rod (720) and a fifth connecting rod (730); The upper end of the third connecting rod (710) is rotatably connected to the base bracket (400) via a tenth rotating shaft (110), and the lower end of the third connecting rod (710) is rotatably connected to the pedal (700) via an eleventh rotating shaft (111); The fourth connecting rod (720) is located at the lower side of the third connecting rod (710), the upper end of the fourth connecting rod (720) is rotationally connected to the base bracket (400) via a twelfth rotating shaft (112), and the lower end of the fourth connecting rod (720) is rotationally connected to the pedal (700) via a thirteenth rotating shaft (113); The front end of the fifth connecting rod (730) is rotatably connected to the fourth connecting rod (720) via a fourteenth rotating shaft (114), and the fourteenth rotating shaft (114) is located between the twelfth rotating shaft (112) and the thirteenth rotating shaft (113). The rear end of the fifth connecting rod (730) is rotatably connected to the rear wheel bracket (500) and is located on the upper side of the seventh rotating shaft (107). When the driving device (600) drives the rear wheel bracket (500) and the base bracket (400) to rotate relative to each other through the seventh rotating shaft (107), the fifth connecting rod (730) can pull the pedal (700) to move downward and make the pedal (700) and the third connecting rod (710) and the fourth connecting rod (720) fold with each other, or the fifth connecting rod (730) can push the pedal (700) to move upward and make the pedal (700) and the third connecting rod (710) and the fourth connecting rod (720) unfold with each other.

9. The wheelchair folding structure according to claim 1, characterized in that: It also includes an armrest (800) and a sixth connecting rod (810), The armrest (800) is arranged above the seat cushion bracket (200), and the rear end of the armrest (800) is rotatably connected to the backrest bracket (300) via a fifteenth rotating shaft (115), and the fifteenth rotating shaft (115) is located above the first rotating shaft (101); The upper end of the sixth connecting rod (810) is rotationally connected to the armrest (800) via a sixteenth rotating shaft (116), and the lower end of the sixth connecting rod (810) is rotationally connected to the seat cushion bracket (200) via a seventeenth rotating shaft (117), and the seventeenth rotating shaft (117) is located on the front side of the first rotating shaft (101).

10. A folding wheelchair, characterized in that: A wheelchair folding structure according to any one of claims 1 to 9 is provided.

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