A folding electric wheelchair

Abstract

The application relates to the technical field of wheelchairs, in particular to a folding electric wheelchair which comprises frame modules, two groups of frame modules are arranged at intervals, a seat module is arranged between the two groups of frame modules, a wheel module is arranged at the bottom of the two groups of frame modules, a footboard module is arranged at the front side of the two groups of frame modules, a folding module comprises a first folding mechanism, a second folding mechanism, a connecting rod mechanism, a locking mechanism and an unlocking mechanism, the first folding mechanism and the second folding mechanism are both arranged between the two groups of frame modules, the connecting rod mechanism is arranged between the first folding mechanism and the second folding mechanism, the locking mechanism is slidingly arranged outside the connecting rod mechanism, a supporting mechanism is hingedly arranged between the locking mechanism and the first folding mechanism, and the unlocking mechanism is slidingly arranged inside the connecting rod mechanism. The application can make the two groups of frame modules approach and compress each other, and the seat module is folded and contracted, so that the volume of the electric wheelchair is reduced, and the electric wheelchair is convenient for packaging, transportation and daily carrying.

Description

Technical Field

[0001] This application relates to the field of wheelchair technology, and in particular to a folding electric wheelchair. Background Technology

[0002] A wheelchair is a chair equipped with wheels that can help replace walking. According to the way wheelchairs move, they can be divided into manual wheelchairs and electric wheelchairs. Wheelchairs are mainly used to meet the mobility needs of people with limb disabilities and those with limited mobility, as well as to facilitate family members to move and care for patients.

[0003] Existing wheelchairs typically include a frame module, a seat module located on top of the frame module for the user to sit on, a wheel module located at the bottom of the frame module for moving the frame module, and a foot pedal module located at the front of the frame module for the user to step on. The frame module is usually designed as a foldable scissor-type structure, which allows the frame module to be folded to reduce its size, thereby facilitating the packaging, transportation, and daily carrying of the wheelchair.

[0004] This application provides another frame module and wheelchair that can be folded to reduce volume, so as to facilitate the packaging, transportation and daily carrying of the wheelchair. Summary of the Invention

[0005] In order to reduce the size of electric wheelchairs and facilitate packaging, transportation / daily carrying, this application provides a foldable electric wheelchair.

[0006] The above-mentioned objective of this application is achieved through the following technical solution:

[0007] A folding electric wheelchair includes a frame module, of which two sets are arranged at intervals; a seat module, which is disposed between the two sets of frame modules and is used for the user to sit; wheel modules, which are disposed at the bottom of the two sets of frame modules and are used to move the frame modules; a foot pedal module, which is disposed at the front of the two sets of frame modules and is used for the user to step on; and a folding module, which includes a first folding mechanism, a second folding mechanism, a linkage mechanism, a locking mechanism, and an unlocking mechanism. The first folding mechanism and the second folding mechanism are both disposed between the two sets of frame modules. The linkage mechanism is disposed between the first folding mechanism and the second folding mechanism and allows the first folding mechanism and the second folding mechanism to unfold or retract synchronously. The locking mechanism is slidably disposed outside the linkage mechanism. A support mechanism is hinged between the locking mechanism and the first folding mechanism. When the locking mechanism slides to a predetermined position of the linkage mechanism, the locking mechanism and the linkage mechanism engage and lock with each other, so that the locking mechanism pushes the first folding mechanism to maintain its unfolded state through the support mechanism. The unlocking mechanism is slidably disposed inside the linkage mechanism and is used to release the engagement and locking relationship between the locking mechanism and the linkage mechanism.

[0008] Optionally, both the first folding mechanism and the second folding mechanism include two sets of folding plates and a connecting plate. The two sets of folding plates are respectively hinged to the two sets of frame modules on opposite sides. The two sides of the connecting plate are respectively hinged to the two sets of folding plates on opposite sides. The two ends of the linkage mechanism are respectively fixed to the connecting plate of the first folding mechanism and the connecting plate of the second folding mechanism.

[0009] Optionally, a first hinge shaft is provided on both sides of the connecting plate and between the two sets of folding plates, and a second hinge shaft is provided on both sides of the locking mechanism and between the two sets of support mechanisms. The connecting plate of the first folding mechanism is provided with a hinge part on the side facing the linkage mechanism. A third hinge shaft is provided between the two sets of hinge parts and the two sets of support mechanisms. When the first folding mechanism and the second folding mechanism are synchronously retracted to their maximum extent, the first hinge shaft, the second hinge shaft, and the third hinge shaft are arranged in the same plane.

[0010] Optionally, the frame module has a mounting cavity in the middle, and a battery circuit module is installed inside the mounting cavity. A protective cover is installed on the frame module corresponding to the mounting cavity. A control module is installed on the top of the frame module. The control module and the battery circuit module, as well as the battery circuit module and the wheel module, are electrically connected by preset wires, and the wires are installed inside the frame module.

[0011] Optionally, the foot pedal module includes a mounting bracket, a foot pedal, a locking pin, and a first elastic element. The front side of the frame module is provided with a mounting groove. One end of the mounting bracket is provided with a mounting part that is compatible with the mounting groove. The foot pedal is located at the end of the mounting bracket away from the mounting part and is used for the user to step on. The locking pin is slidably disposed inside the frame module. The first elastic element is fixedly disposed between the frame module and the locking pin and is used to push the locking pin to slide until it abuts against the mounting bracket. The mounting bracket is provided with a locking groove that is compatible with the locking pin. When the mounting part is fully inserted into the mounting groove, the locking pin is inserted into the locking groove.

[0012] Optionally, the locking mechanism includes a sliding seat, a movable pin, and a second elastic element. The sliding seat is slidably disposed outside the linkage mechanism, and the movable pin is slidably disposed inside the sliding seat. The second elastic element is disposed between the sliding seat and the movable pin and is used to push the movable pin to slide until it abuts against the outside of the linkage mechanism. The linkage mechanism is provided with a locking hole that is mutually engaged and adapted with the movable pin, and when the sliding seat slides to a predetermined position of the linkage mechanism, the movable pin is inserted into the locking hole. The unlocking mechanism includes an unlocking push rod, an unlocking head, and a handle assembly. The unlocking push rod is slidably disposed inside the linkage mechanism, the unlocking head is disposed at one end of the unlocking push rod and is provided with a wedge surface, and the handle assembly is disposed at the end of the unlocking push rod away from the unlocking head, and the handle assembly is used to push the unlocking push rod to slide so that the wedge surface pushes the movable pin out of the locking hole.

[0013] Optionally, the handle assembly includes an unlocking handle, an alignment push rod, a third elastic element, and a fourth elastic element. The unlocking handle is slidably disposed at the end of the linkage mechanism away from the first folding mechanism. The alignment push rod is fixedly disposed at the end of the unlocking push rod away from the unlocking head. The unlocking handle is provided with a rotating groove adapted to the rotation of the alignment push rod. The bottom of the rotating groove is provided with a clearance groove adapted to the sliding of the alignment push rod. The third elastic element is disposed between the unlocking handle and the linkage mechanism and is used to push the unlocking handle to slide away from the alignment push rod so that the alignment push rod is located inside the rotating groove. The fourth elastic element is disposed between the unlocking handle and the linkage mechanism and is used to drive the unlocking handle to rotate along the axis of the linkage mechanism so that the alignment push rod and the clearance groove are aligned with each other.

[0014] Optionally, the fourth elastic element includes a reset ring, a reset slider, and a reset spring. The inner circumference of the reset ring is slidably disposed on the outer circumference of the unlocking handle, and the inner circumference of the reset ring and the outer circumference of the unlocking handle are provided with mutually meshing sliding teeth, so that the unlocking handle has the freedom to slide in a direction away from the alignment push rod. The reset slider is fixedly disposed on the outer circumference of the reset ring. The inner circumference of the linkage mechanism is provided with a reset groove distributed along the axis of the linkage mechanism. The reset slider is slidably disposed on the reset groove. The reset spring is disposed between the reset groove and the reset slider and is used to drive the reset ring to rotate along the axis of the linkage mechanism.

[0015] Optionally, an anti-loosening mechanism is provided between the fourth elastic element and the locking mechanism. The anti-loosening mechanism includes a fixed tube, a sliding rod, and an anti-loosening ring. The fixed tube extends along the axis of the linkage mechanism and is fixedly disposed on the inner circumference of the linkage mechanism. The sliding rod is slidably disposed on the inner circumference of the fixed tube. The anti-loosening ring is fixedly disposed on one end of the sliding rod. A sliding ball is disposed on the end of the sliding rod away from the anti-loosening ring. The reset ring is provided with a push groove distributed along the axis of the linkage mechanism. The sliding ball is slidably disposed on the push groove. When the reset ring rotates along the axis of the linkage mechanism to align the alignment push rod and the clearance groove, the sliding ball drives the anti-loosening ring to abut against the movable pin through the sliding rod.

[0016] Optionally, the anti-loosening mechanism is configured in two sets, and the locking mechanism is configured in two sets, with the two sets of anti-loosening mechanisms and the two sets of locking mechanisms being staggered from each other along the axis of the linkage mechanism.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] When packaging, transporting, or carrying the electric wheelchair daily, the handle assembly pushes the unlocking head to slide via the unlocking push rod. The wedge-shaped surface of the unlocking head pushes the movable pin out of the locking hole, thereby releasing the locking relationship between the locking mechanism and the linkage mechanism. This allows the first and second folding mechanisms to fold and retract, bringing the two sets of frame modules closer together and compressing them. The seat module folds and retracts, reducing the size of the electric wheelchair for easier packaging, transport, or daily carrying. Attached Figure Description

[0019] Figure 1 This is a three-dimensional view of the overall structure of this application.

[0020] Figure 2 This is a schematic diagram showing the location of the folding module in this application.

[0021] Figure 3 This is a structural cross-sectional view of the framework module in this application.

[0022] Figure 4 This is a structural cross-sectional view of the foot pedal module in this application.

[0023] Figure 5 This is a cross-sectional view of the overall structure of this application.

[0024] Figure 6 This is a three-dimensional view of the folding module in the unfolded state in this application.

[0025] Figure 7 This is a three-dimensional view of the folding module in the present application during the shrinking process.

[0026] Figure 8This is a cross-sectional view of the folding module in Embodiment 1 of this application.

[0027] Figure 9 This is a vertical sectional view of the folding module in Embodiment 2 of this application.

[0028] Figure 10 This is a horizontal sectional view of the folding module in Embodiment 2 of this application.

[0029] Figure 11 This is a vertical sectional view of the fourth elastic element in Embodiment 2 of this application.

[0030] Figure 12 This is a cross-sectional view of the fourth elastic element in Embodiment 2 of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Frame module; 2. Seat module; 3. Wheel module; 4. Foot pedal module; 41. Mounting bracket; 42. Foot pedal; 43. Locking pin; 44. First elastic element; 45. Mounting slot; 46. Mounting part; 47. Locking slot; 5. Folding module; 51. First folding mechanism; 52. Second folding mechanism; 53. Linkage mechanism; 54. Locking mechanism; 541. Sliding seat; 542. Movable pin; 543. Second elastic element; 544. Locking hole; 55. Unlocking mechanism; 551. Unlocking push rod; 552. Unlocking head; 553. Handle assembly; 5531. Unlocking handle; 5532. Alignment push rod; 5533. Third elastic element; 5534. Fourth elastic element; 5535. Rotating groove; 5536. Clearance groove; 554. Wedge surface; 56. Support mechanism; 61. Folding plate; 62. Connecting plate; 71. First hinge shaft; 72. Second hinge shaft; 73. Third hinge shaft; 81. Mounting cavity; 82. Battery circuit module; 83. Protective cover plate; 84. Control module; 91. Reset ring; 92. Reset slider; 93. Reset spring; 94. Sliding tooth; 95. Reset slide groove; 10. Anti-loosening mechanism; 101. Fixing tube; 102. Sliding rod; 103. Anti-loosening ring; 104. Sliding ball; 105. Propulsion slide groove; 111. Handle part; 112. Sliding rod part; 113. Linkage part. Detailed Implementation

[0032] The following is in conjunction with the appendix Figures 1 to 6 This application will be described in further detail.

[0033] This application discloses a folding electric wheelchair.

[0034] Example 1:

[0035] Reference Figure 1-3The folding electric wheelchair includes a frame module 1, a seat module 2, a wheel module 3, a footrest module 4, and a folding module 5. The frame module 1 consists of two sets, symmetrically spaced, and each set is made of carbon fiber in a single, integrated design, giving it lightweight and high strength. The seat module 2 is fixedly positioned between the two frame modules 1 and features a foldable fabric design, allowing it to be used for seating and folded for storage. The wheel module 3 is fixedly positioned at the bottom of the two frame modules 1 and uses electric wheels, allowing the user to control the wheel folding mechanism. The wheel module 3 can drive the frame module 1 and the entire electric wheelchair to move; the foot pedal module 4 is fixedly installed on the front of the two sets of frame modules 1, and the foot pedal module 4 adopts a detachable structure for installation and fixation, so that the foot pedal module 4 can be installed on the front of the frame module 1 for the user to step on according to the user's actual needs; the folding module 5 is set between the two sets of frame modules 1. The folding module 5 has the function of unfolding or retracting, so that the folding module 5 can not only drive the two sets of frame modules 1 to unfold for use, but also drive the two sets of frame modules 1 to retract to reduce the overall volume of the electric wheelchair, thereby facilitating the overall packaging, transportation and daily carrying of the electric wheelchair.

[0036] The wheel module 3 specifically includes two sets of electric vehicle wheels and two sets of ordinary wheels. Both electric vehicle wheels and ordinary wheels are disclosed in the prior art and will not be described in detail here. The two sets of electric vehicle wheels are respectively fixedly installed on the rear side of the two sets of frame modules 1, and the two sets of ordinary wheels are respectively fixedly installed on the front side of the two sets of frame modules 1, so that the wheel module 3 can drive the frame module 1 and the electric wheelchair as a whole to move. In addition, the frame module 1 has a mounting cavity 81 in the middle, and a battery circuit module 82 is installed inside the mounting cavity 81. A protective cover plate 83 is installed on the frame module 1 corresponding to the mounting cavity 81. A control module 84 is installed on the top of the frame module 1. Both the battery circuit module 82 and the control module 84 are disclosed in the prior art and will not be described in detail here. The control module 84 and the battery circuit module 82, and the battery circuit module 82 and the wheel module 3 are electrically connected by preset wires, and the wires are installed inside the frame module 1. The user inputs commands through the control module 84, and the battery circuit module 82 receives the commands and controls the wheel module 3 to perform corresponding actions. This enables the wheel module 3 to drive the frame module 1 and the electric wheelchair to perform forward, backward, and turning movements. The wires are distributed inside the integrated frame module 1, which helps to protect the wires and minimizes the risk of damage during the folding of the electric wheelchair.

[0037] The foot pedal module 4 specifically includes a mounting bracket 41, a foot pedal 42, a locking pin 43, and a first elastic element 44. The frame module 1 has a mounting groove 45 with an upwardly angled opening on its front side. The mounting bracket 41 is a bent rod structure made of carbon fiber. A mounting part 46, which is integrally formed and fitted to the mounting groove 45, is fixedly mounted on the top of the mounting bracket 41. The foot pedal 42 is fixedly mounted on the end of the mounting bracket 41 away from the mounting part 46 and is used for user stepping. The locking pin 43 is slidably inserted inside the frame module 1. The first elastic element 44 is a pressure-type... The spring structure has a first elastic element 44 fixedly disposed between the frame module 1 and the locking pin 43. The first elastic element 44 is used to push the locking pin 43 to slide to abut against the mounting bracket 41. The mounting bracket 41 is provided with a locking groove 47 that is matched and engaged with the locking pin 43. When the mounting part 46 is fully inserted into the mounting groove 45, the locking pin 43 is inserted into the locking groove 47, thereby using the locking pin 43 to detachably lock the mounting bracket 41, so that the foot pedal module 4 can be installed on the front side of the frame module 1 for the user to step on according to the user's actual needs.

[0038] The folding module 5 specifically includes a first folding mechanism 51, a second folding mechanism 52, a linkage mechanism 53, a locking mechanism 54, and an unlocking mechanism 55. The first folding mechanism 51 and the second folding mechanism 52 have the same overall structure. Both are arranged between two sets of frame modules 1 and are spaced apart. Both have the function of unfolding or retracting. Specifically, the first folding mechanism 51 and the second folding mechanism 52 each include two sets of folding plates 61 and a connecting plate 62. The two sets of folding plates 61 are arranged symmetrically and spaced apart. The two sets of folding plates 61 are respectively hinged to the two sets of frame modules 1 on the side away from each other. The two sides of the connecting plate 62 are respectively hinged to the two sets of folding plates 61 on the side closer to each other. By controlling the two sets of folding plates 61 to unfold or retract synchronously with respect to the connecting plate 62, the folding function of the first folding mechanism 51 and the second folding mechanism 52 can be realized.

[0039] The linkage mechanism 53 is a metal cylindrical tube structure. Both ends of the linkage mechanism 53 are vertically fixed to the connecting plate 62 of the first folding mechanism 51 and the connecting plate 62 of the second folding mechanism 52, respectively. During the process of the linkage mechanism 53 driving the two connecting plates 62 to move synchronously, the two sets of folding plates 61 of the first folding mechanism 51 and the two sets of folding plates 61 of the second folding mechanism 52 are synchronously unfolded or retracted, thereby realizing the synchronous unfolding or retraction of the first folding mechanism 51 and the second folding mechanism 52.

[0040] The locking mechanism 54 is slidably disposed outside the linkage mechanism 53. A support mechanism 56 is hinged between the locking mechanism 54 and the first folding mechanism 51. When the locking mechanism 54 slides to a predetermined position of the linkage mechanism 53, the locking mechanism 54 and the linkage mechanism 53 engage and lock each other, so that the locking mechanism 54 pushes the first folding mechanism 51 to maintain its unfolded state through the support mechanism 56. Specifically, the locking mechanism 54 includes a sliding seat 541, a movable pin 542, and a second elastic element 543. The sliding seat 541 is slidably disposed outside the linkage mechanism 53. The support mechanism 56 is a metal support rod structure and is configured in two sets. One end of each set of support mechanisms 56 is hinged to both sides of the sliding seat 541. The other ends of the two sets of support mechanisms 56 are respectively hinged to the two sets of folding plates 61 of the first folding mechanism 51. The sliding seat 541 is provided with a spring cavity. The movable pin 542 slides through the spring cavity inside the sliding seat 541. The second elastic member 543 adopts a compression spring structure. The second elastic member 543 is provided in the spring cavity inside the sliding seat 541 and abuts against the movable pin 542 to push the movable pin 542 to slide to abut against the outside of the linkage mechanism 53. The linkage mechanism 53 is provided with a locking hole 544 that is matched with the movable pin 542. When the sliding seat 541 slides to the predetermined position of the linkage mechanism 53, the movable pin 542 is inserted into the locking hole 544. When the sliding seat 541 slides to the predetermined position of the linkage mechanism 53, the sliding seat 541 is locked by the engagement of the movable pin 542 and the locking hole 544. At this time, the sliding seat 541 supports the two sets of folding plates 61 of the first folding mechanism 51 through the support mechanism 56, so that the first folding mechanism 51, the support mechanism 56 and the linkage mechanism 53 form a stable triangular structure, thereby achieving the effect of the locking mechanism 54 pushing the first folding mechanism 51 to maintain the unfolded state through the support mechanism 56.

[0041] The unlocking mechanism 55 is slidably disposed inside the linkage mechanism 53, and the unlocking mechanism 55 is used to release the locking relationship between the locking mechanism 54 and the linkage mechanism 53, so that the locking mechanism 54 can regain the freedom of sliding relative to the linkage mechanism 53. The unlocking mechanism 55 specifically includes an unlocking push rod 551, an unlocking head 552, and a handle assembly 553. The unlocking push rod 551 is slidably disposed inside the linkage mechanism 53 through a preset sliding support. The unlocking head 552 is located near the locking hole 544 and is fixedly disposed at one end of the unlocking push rod 551. The unlocking head 552 is provided with a wedge surface 554. The wedge surface 554 can push the movable pin 542 to slide against the elastic force of the second elastic element 543, so that the wedge surface 554 can push the movable pin 542 out of the locking hole 544. The handle assembly 553 is disposed at the end of the unlocking push rod 551 away from the unlocking head 552, and the handle assembly 553 is used to push the unlocking push rod 551 to slide relative to the linkage mechanism 53. When the handle assembly 553 pushes the unlocking head 552 to slide through the unlocking push rod 551, the inclined wedge surface 554 of the unlocking head 552 pushes the movable pin 542 out of the locking hole 544, thereby releasing the locking relationship between the locking mechanism 54 and the linkage mechanism 53, so that the first folding mechanism 51 and the second folding mechanism 52 can be folded and retracted.

[0042] Implementation principle:

[0043] When an electric wheelchair is needed, the sliding seat 541 is manually pushed to slide along the linkage mechanism 53 in the direction close to the first folding mechanism 51. When the sliding seat 541 slides to the predetermined position of the linkage mechanism 53, the movable pin 542 and the locking hole 544 are aligned, and the movable pin 542 is pushed by the second elastic member 543 to insert into the locking hole 544. At this time, the sliding seat 541 supports the two sets of folding plates 61 of the first folding mechanism 51 through the support mechanism 56, so that the first folding mechanism 51, the support mechanism 56, and the linkage mechanism 53 form a stable triangular structure. Thus, the locking mechanism 54 pushes the first folding mechanism 51 to keep it in the unfolded state through the support mechanism 56. Simultaneously, the linkage mechanism 53 pushes the second folding mechanism 52 in the opposite direction to keep it in the unfolded state, so that the two sets of frame modules 1 and seat module 2 are kept in the unfolded state for the user to sit on.

[0044] When the electric wheelchair needs to be packaged for transportation or carried daily, the handle assembly 553 pushes the unlocking head 552 to slide through the unlocking push rod 551. The inclined wedge surface 554 of the unlocking head 552 pushes the movable pin 542 out of the locking hole 544, thereby releasing the locking relationship between the locking mechanism 54 and the linkage mechanism 53. This allows the first folding mechanism 51 and the second folding mechanism 52 to fold and retract, thereby bringing the two sets of frame modules 1 closer together and compressing them. The seat module 2 folds and retracts, thereby reducing the size of the electric wheelchair for easy packaging, transportation, or daily carrying.

[0045] In this embodiment, first hinge shafts 71 are respectively provided on both sides of the connecting plate 62 and between the two sets of folding plates 61, and second hinge shafts 72 are respectively provided on both sides of the locking mechanism 54 and between the two sets of support mechanisms 56. The connecting plate 62 of the first folding mechanism 51 is fixedly provided with a protruding hinge portion on the side facing the linkage mechanism 53, and a third hinge shaft 73 is respectively provided between the two sets of hinge portions and the two sets of support mechanisms 56. The distance between the first hinge shaft 71 and the linkage mechanism 53, the distance between the second hinge shaft 72 and the linkage mechanism 53, and the distance between the third hinge shaft 73 and the top of the hinge portion are equal, so that when the first folding mechanism 51 and the second folding mechanism 52 are synchronously retracted to the maximum extent, the first hinge shaft 71, the second hinge shaft 72, and the third hinge shaft 73 are arranged in the same plane.

[0046] Example 2:

[0047] The difference between Embodiment 1 and Embodiment 2 is that in Embodiment 1, the unlocking head 552 can be slid by simply pushing the handle assembly 553, thus completing the unlocking process simply. In Embodiment 1, the handle assembly 553 needs to be rotated by a certain angle before the unlocking head 552 can be slid by the unlocking push rod 551. This is to avoid the situation where the locking relationship between the locking mechanism 54 and the linkage mechanism 53 is released due to accidental contact with the handle assembly 553. Both have their advantages.

[0048] The handle assembly 553 specifically includes an unlocking handle 5531, an alignment push rod 5532, a third elastic element 5533, and a fourth elastic element 5534. The unlocking handle 5531 includes a handle portion 111, a sliding rod portion 112, and a linkage portion 113 connected in sequence. The sliding rod portion 112 of the unlocking handle 5531 is slidably disposed at the end of the linkage mechanism 53, giving the unlocking handle 5531 the freedom to rotate and slide along the axis of the linkage mechanism 53. The alignment push rod 5532 has a near-T-shaped structure. The tail of the 5532 is fixedly mounted on the end of the unlocking push rod 551 away from the unlocking head 552. The linkage part 113 of the unlocking handle 5531 is provided with a rotating groove 5535 adapted to the rotation of the head of the aligning push rod 5532, that is, the head of the aligning push rod 5532 can freely rotate inside the rotating groove 5535. The bottom of the rotating groove 5535 is provided with a clearance groove 5536 adapted to the sliding of the head of the aligning push rod 5532. When the unlocking handle 5531 rotates until the clearance groove 5536 is aligned with the head of the aligning push rod 5532, the unlocking is completed. The locking handle 5531 and the aligning push rod 5532 slide relative to each other, and the unlocking handle 5531 cannot push the aligning push rod 5532. However, as the unlocking handle 5531 rotates until the clearance groove 5536 is misaligned with the head of the aligning push rod 5532, the unlocking handle 5531 and the aligning push rod 5532 slide synchronously, and the unlocking handle 5531 can push the aligning push rod 5532. The third elastic element 5533 adopts a compression spring structure and is located between the unlocking handle 5531 and the linkage mechanism 53. The fourth elastic element 5533 is used to push the unlocking handle 5531 to slide away from the alignment push rod 5532, so that the head of the alignment push rod 5532 slides into the rotating groove 5535; the fourth elastic element 5534 is similar to a torsion spring structure. The fourth elastic element 5534 is disposed between the linkage part 113 of the unlocking handle 5531 and the linkage mechanism 53, and the fourth elastic element 5534 is used to drive the unlocking handle 5531 to rotate along the axis of the linkage mechanism 53, so that the alignment push rod 5532 and the clearance groove 5536 are aligned with each other.

[0049] The fourth elastic element 5534 specifically includes a reset ring 91, a reset slider 92, and a reset spring 93. The inner circumference of the reset ring 91 is slidably disposed on the outer circumference of the linkage portion 113 of the unlocking handle 5531. The inner circumference of the reset ring 91 and the outer circumference of the linkage portion 113 of the unlocking handle 5531 are provided with mutually meshing sliding teeth 94, allowing the unlocking handle 5531 to have the freedom to slide away from the alignment push rod 5532. Furthermore, the linkage portion 113 of the unlocking handle 5531 can also drive the reset ring 91 to rotate. The reset slider 92 is fixedly disposed on the outer circumference of the reset ring 91. The inner circumference of the linkage mechanism 53 is provided with reset grooves 95 distributed along the axis of the linkage mechanism 53. The reset slider 92 is slidably disposed in the reset grooves 95. The reset spring 93 adopts a compression spring structure and is fixedly disposed between the reset grooves 95 and the reset slider 92, and is used to drive the reset ring 91 to rotate along the axis of the linkage mechanism 53.

[0050] When the handle assembly 553, unlocking push rod 551, and unlocking head 552 are needed to push the movable pin 542 out of the locking hole 544, first rotate the unlocking handle 5531 90 degrees so that the clearance groove 5536 rotates to be misaligned with the head of the aligning push rod 5532. Then push the unlocking handle 5531. Since the unlocking handle 5531 and the aligning push rod 5532 are in contact, the unlocking handle 5531 pushes the aligning push rod 5532 to slide synchronously, so that the unlocking push rod 551 pushes the unlocking head 544. Sliding the unlocking handle 52 allows the wedge surface 554 of the unlocking head 552 to push the movable pin 542 out of the locking hole 544, thereby releasing the locking mechanism 54 and the linkage mechanism 53 from their locking relationship. Conversely, if the unlocking handle 5531 is pushed directly, the clearance groove 5536 of the unlocking handle 5531 aligns with the head of the aligning push rod 5532, causing the unlocking handle 5531 to slide relative to the aligning push rod 5532, thus preventing the unlocking handle 5531 from pushing the aligning push rod 5532. By rotating and then pushing the unlocking handle 5531, the locking mechanism 54 and the linkage mechanism 53 from being released due to accidental contact by children or users can be effectively prevented.

[0051] In this embodiment, an anti-loosening mechanism 10 is provided between the fourth elastic member 5534 and the locking mechanism 54. The anti-loosening mechanism 10 can assist in abutting against the movable pin 542 when the folding module 5 is unfolded. Even if the elasticity of the second elastic member 543 fails, it can still assist the movable pin 542 in maintaining a stable engagement relationship in the locking hole 544.

[0052] The anti-loosening mechanism 10 specifically includes a fixed tube 101, a sliding rod 102, and an anti-loosening ring 103. The fixed tube 101 extends along the axial direction of the linkage mechanism 53 and is fixedly disposed within the inner circumference of the linkage mechanism 53. The sliding rod 102 slides through the inner circumference of the fixed tube 101, with one end extending to the side of the movable pin 542 away from the unlocking head 552. The anti-loosening ring 103 is a rubber ring structure, also located on the side of the movable pin 542 away from the unlocking head 552 and fixedly disposed on the sliding rod 102. A sliding ball 104 is provided at the end of the movable rod 102 away from the anti-loosening ring 103. The diameter of the sliding ball 104 is larger than the diameter of the sliding rod 102. The reset ring 91 is provided with a push groove 105 distributed along the axis of the linkage mechanism 53. The bottom of the push groove 105 is a lifting wedge surface. The sliding ball 104 is slidably disposed in the push groove 105. When the reset ring 91 rotates along the axis of the linkage mechanism 53 so that the alignment push rod 5532 and the clearance groove 5536 are aligned with each other, the sliding ball 104 drives the anti-loosening ring 103 to abut against the movable pin 542 through the sliding rod 102.

[0053] When there are no other external forces acting on the folding mechanism, the third elastic element 5533 pushes the unlocking handle 5531 to slide and reset in the direction away from the alignment push rod 5532, and the fourth elastic element 5534 drives the unlocking handle 5531 to rotate and reset along the axis of the linkage mechanism 53. As the reset ring 91 rotates, the sliding ball 104 slides along the lifting wedge surface at the bottom of the push groove 105, and drives the anti-loosening ring 103 to move to the locking hole 544 position through the sliding rod 102. When the folding mechanism unfolds and the movable pin 542 is inserted into the locking hole 544 under the elastic force of the second elastic element 543, the anti-loosening ring 103 abuts against the side of the movable pin 542 away from the unlocking head 552, so that the anti-loosening ring 103 can assist in abutting against the movable pin 542 in the unfolded state of the folding module 5, and cooperate with the second elastic element 543 to improve the locking stability of the movable pin 542 in the locking hole 544.

[0054] When it is necessary to use the handle assembly 553, unlocking push rod 551, and unlocking head 552 to push the movable pin 542 out of the locking hole 544, first rotate the unlocking handle 5531 to drive the rotation of the reset ring 91. The sliding ball 104 slides along the lifting wedge surface at the bottom of the push groove 105, and pushes the anti-loosening ring 103 to move and disengage from the movable pin 542 through the sliding rod 102. At this time, pushing the unlocking handle 5531 can release the locking relationship between the locking mechanism 54 and the linkage mechanism 53.

[0055] In this embodiment, two sets of anti-loosening mechanisms 10 and two sets of locking mechanisms 54 are configured, and the two sets of anti-loosening mechanisms 10 and the two sets of locking mechanisms 54 are staggered from each other along the axis of the linkage mechanism 53. The structural reliability is improved by increasing the number of anti-loosening mechanisms 10 and locking mechanisms 54.

[0056] The embodiments described herein are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A foldable electrically powered wheelchair, characterized by: The utility model relates to a folding frame module (1) and a folding seat module (2) are arranged on the frame module (1) and are used for the user to sit down, and the folding frame module (1) and the folding seat module (2) are connected through a folding module (5), and the folding module (5) is used for the folding frame module (1) and the folding seat module (2) to be folded or unfolded. The folding module (5) includes a first folding mechanism (51), a second folding mechanism (52), a connecting rod mechanism (53), a locking mechanism (54) and an unlocking mechanism (55), the first folding mechanism (51) and the second folding mechanism (52) are arranged between the two frame modules (1), the connecting rod mechanism (53) is arranged between the first folding mechanism (51) and the second folding mechanism (52) and synchronously expands or contracts the first folding mechanism (51) and the second folding mechanism (52), the locking mechanism (54) is slidably arranged outside the connecting rod mechanism (53), a supporting mechanism (56) is hingedly arranged between the locking mechanism (54) and the first folding mechanism (51), and when the locking mechanism (54) slides to a predetermined position of the connecting rod mechanism (53), the locking mechanism (54) and the connecting rod mechanism (53) are mutually clamped and locked, so that the locking mechanism (54) pushes the first folding mechanism (51) to keep an expanded state through the supporting mechanism (56), and the unlocking mechanism (55) is slidably arranged inside the connecting rod mechanism (53) and is used for releasing the clamping and locking relationship between the locking mechanism (54) and the connecting rod mechanism (53). The locking mechanism (54) includes a sliding seat (541), a movable bolt (542) and a second elastic member (543), the sliding seat (541) is slidably arranged outside the connecting rod mechanism (53), the movable bolt (542) is slidably arranged inside the sliding seat (541), the second elastic member (543) is arranged between the sliding seat (541) and the movable bolt (542) and is used for sliding the movable bolt (542) to abut against the outside of the connecting rod mechanism (53), the connecting rod mechanism (53) is provided with a locking hole (544) matched with the movable bolt (542) for mutual clamping, and when the sliding seat (541) slides to a predetermined position of the connecting rod mechanism (53), the movable bolt (542) is inserted into the locking hole (544), the unlocking mechanism (55) includes an unlocking push rod (551), an unlocking head (552) and a handle assembly (553), the unlocking push rod (551) is slidably arranged inside the connecting rod mechanism (53), the unlocking head (552) is arranged at one end of the unlocking push rod (551), the unlocking head (552) is provided with an inclined wedge surface (554), and the handle assembly (553) is arranged at the other end of the unlocking push rod (551) away from the unlocking head (552), and the handle assembly (553) is used for sliding the unlocking push rod (551) to push the movable bolt (542) out of the locking hole (544) through the inclined wedge surface (554). ​ ​ ​ ​ The handle assembly (553) comprises an unlocking handle (5531), a positioning push rod (5532), a third elastic member (5533) and a fourth elastic member (5534). The unlocking handle (5531) is slidingly arranged at one end of the linkage mechanism (53) away from the first folding mechanism (51). The positioning push rod (5532) is fixedly arranged at one end of the unlocking push rod (551) away from the unlocking head (552). The unlocking handle (5531) is provided with a rotating groove (5535) rotationally matched with the positioning push rod (5532). The bottom of the rotating groove (5535) is provided with an avoiding groove (5536) slidingly matched with the positioning push rod (5532). The third elastic member (5533) is arranged between the unlocking handle (5531) and the linkage mechanism (53) and is used for sliding the unlocking handle (5531) away from the positioning push rod (5532) to enable the positioning push rod (5532) to be located inside the rotating groove (5535). The fourth elastic member (5534) is arranged between the unlocking handle (5531) and the linkage mechanism (53) and is used for rotating the unlocking handle (5531) along the axis of the linkage mechanism (53) to enable the positioning push rod (5532) and the avoiding groove (5536) to be aligned with each other. The fourth elastic member (5534) comprises a reset ring (91), a reset sliding block (92) and a reset spring (93). The inner periphery of the reset ring (91) is slidingly arranged at the outer periphery of the unlocking handle (5531). The inner periphery of the reset ring (91) and the outer periphery of the unlocking handle (5531) are provided with sliding teeth (94) matched with each other, so that the unlocking handle (5531) has the freedom to slide away from the positioning push rod (5532). The reset sliding block (92) is fixedly arranged at the outer periphery of the reset ring (91). The inner periphery of the linkage mechanism (53) is provided with reset sliding grooves (95) distributed along the axis of the linkage mechanism (53). The reset sliding block (92) is slidingly arranged in the reset sliding grooves (95). The reset spring (93) is arranged between the reset sliding grooves (95) and the reset sliding block (92) and is used for rotating the reset ring (91) along the axis of the linkage mechanism (53). A loosening prevention mechanism (10) is arranged between the fourth elastic member (5534) and the locking mechanism (54), and the loosening prevention mechanism (10) comprises a fixed tube (101), a sliding rod (102) and a loosening prevention ring (103), the fixed tube (101) extends along the axis direction of the connecting rod mechanism (53), and the fixed tube (101) is fixedly arranged on the inner periphery of the connecting rod mechanism (53), the sliding rod (102) is slidingly arranged on the inner periphery of the fixed tube (101), the loosening prevention ring (103) is fixedly arranged on one end of the sliding rod (102), one end of the sliding rod (102) away from the loosening prevention ring (103) is provided with a sliding ball (104), the reset ring (91) is provided with a pushing sliding groove (105) distributed along the axis of the connecting rod mechanism (53), the sliding ball (104) is slidingly arranged in the pushing sliding groove (105), and when the reset ring (91) rotates along the axis of the connecting rod mechanism (53) to align the alignment push rod (5532) and the avoiding groove (5536) with each other, the sliding ball (104) drives the loosening prevention ring (103) to abut against the movable bolt (542) through the sliding rod (102).

2. The foldable electric wheelchair according to claim 1, wherein: The first folding mechanism (51) and the second folding mechanism (52) each comprise two groups of folding plates (61) and a connecting plate (62), the two groups of folding plates (61) are respectively hingedly arranged on the two groups of frame modules (1) away from each other, and the connecting plate (62) is respectively hingedly arranged on the two groups of folding plates (61) close to each other on both sides, and the connecting rod mechanism (53) is fixedly arranged at both ends of the connecting plate (62) of the first folding mechanism (51) and the connecting plate (62) of the second folding mechanism (52).

3. The foldable electric wheelchair according to claim 2, wherein: First hinged shafts (71) are respectively arranged between the two sides of the connecting plate (62) and the two groups of folding plates (61), second hinged shafts (72) are respectively arranged between the two sides of the locking mechanism (54) and the two groups of supporting mechanisms (56), the connecting plate (62) of the first folding mechanism (51) is provided with a hinged part on the side facing the connecting rod mechanism (53), third hinged shafts (73) are respectively arranged between the two groups of hinged parts and the two groups of supporting mechanisms (56), and when the first folding mechanism (51) and the second folding mechanism (52) are synchronously contracted to the maximum, the first hinged shaft (71), the second hinged shaft (72) and the third hinged shaft (73) are coplanarly arranged.

4. The foldable electric wheelchair according to claim 1, wherein: A mounting cavity (81) is arranged in the middle of the frame module (1), a battery circuit module (82) is arranged in the mounting cavity (81), a protective cover plate (83) is arranged on the frame module (1) corresponding to the position of the mounting cavity (81), a control module (84) is arranged on the top of the frame module (1), and the control module (84) and the battery circuit module (82) and the battery circuit module (82) and the wheel module (3) are electrically connected through the preset wires, and the wires are arranged in the frame module (1).

5. The foldable electric wheelchair of claim 1, wherein: The foot pedal module (4) comprises a mounting frame (41), a foot pedal (42), a locking bolt (43) and a first elastic member (44), the frame module (1) is provided with a mounting groove (45) on the front side, one end of the mounting frame (41) is provided with a mounting part (46) which is adapted to be inserted into the mounting groove (45), the foot pedal (42) is arranged on the end of the mounting frame (41) away from the mounting part (46) and is used for being stepped by a user, the locking bolt (43) is slidingly arranged in the frame module (1), the first elastic member (44) is fixedly arranged between the frame module (1) and the locking bolt (43) and is used for slidingly pushing the locking bolt (43) to abut against the mounting frame (41), the mounting frame (41) is provided with a locking groove (47) which is adapted to be clamped with the locking bolt (43), and when the mounting part (46) is completely inserted into the mounting groove (45), the locking bolt (43) is inserted into the locking groove (47).

6. The foldable electric wheelchair of claim 1, wherein: The anti-loosening mechanism (10) is arranged in two groups, the locking mechanism (54) is arranged in two groups, and the two groups of anti-loosening mechanisms (10) and the two groups of locking mechanisms (54) are arranged in a staggered manner along the axis direction of the connecting rod mechanism (53).

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