Folding electric wheelchair

Abstract

The invention relates to the technical field of wheelchairs, in particular to a folding electric wheelchair which comprises two sets of frame modules arranged in a spaced mode. The seat module is arranged between the two groups of frame modules; the wheel modules are arranged at the bottoms of the two frame modules. The pedal module is arranged on the front sides of the two groups of frame modules; the 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 sets of frame modules, the connecting rod mechanism is arranged between the first folding mechanism and the second folding mechanism, and the locking mechanism is arranged outside the connecting rod mechanism in a sliding mode; a supporting mechanism is arranged between the locking mechanism and the first folding mechanism in a hinged mode, and the unlocking mechanism is arranged in the connecting rod mechanism in a sliding mode. The two frame modules can be close to each other to be compressed, and the seat module is folded and condensed, so that the size of the electric wheelchair is reduced, and packaging, transportation and daily carrying are facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of wheelchairs, and in particular to a foldable electric wheelchair. Background Art

[0002] A wheelchair is a chair with wheels that can help replace walking. It can be divided into manual wheelchairs and electric wheelchairs according to the way the wheelchair moves. Wheelchairs are mainly used to meet the transportation needs of people with physical disabilities and mobility difficulties, as well as to facilitate family members to move and care for patients.

[0003] Existing wheelchairs usually include a frame module, a seat module arranged on the top of the frame module and for a user to sit on, a wheel module arranged at the bottom of the frame module and for driving the frame module to move, and a pedal module arranged at the front side of the frame module and for a user to step on; wherein the frame module is usually arranged as a foldable scissor-type structure, so that the frame module can be folded to reduce its volume, thereby facilitating the packaging, transportation and daily carrying of the wheelchair.

[0004] The present application provides another frame module and a wheelchair that can be folded to reduce the 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 an electric wheelchair and facilitate packaging and transportation / daily carrying, the present application provides a foldable electric wheelchair.

[0006] The above-mentioned purpose of the present application is achieved through the following technical solutions: A foldable electric wheelchair comprises a frame module, wherein the frame modules are configured in two groups and the two groups of frame modules are arranged at intervals; a seat module, wherein the seat module is arranged between the two groups of frame modules and is used for a user to sit on; a wheel module, wherein the wheel module is arranged at the bottom of the two groups of frame modules and is used for driving the frame modules to move; a pedal module, wherein the pedal module is arranged at the front side of the two groups of frame modules and is used for a user to step on; a folding module, wherein the folding module comprises a first folding mechanism, a second folding mechanism, a connecting rod mechanism, a locking mechanism and an unlocking mechanism, wherein 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 and allows the first folding mechanism and the second folding mechanism to be synchronously expanded or folded, the locking mechanism is slidably arranged outside the connecting rod mechanism, a supporting mechanism is hingedly arranged between the locking mechanism and the first folding mechanism, and when the locking mechanism slides to a predetermined position of the connecting rod mechanism, the locking mechanism and the connecting rod mechanism are mutually engaged and locked, so that the locking mechanism pushes the first folding mechanism through the supporting mechanism to maintain an expanded state, and the unlocking mechanism is slidably arranged inside the connecting rod mechanism and is used to release the engaged and locked relationship between the locking mechanism and the connecting rod mechanism.

[0007] Optionally, the first folding mechanism and the second folding mechanism each include two groups of folding plates and a connecting plate. The two groups of folding plates are hingedly arranged on the two groups of frame modules on the sides away from each other, and the two sides of the connecting plate are hingedly arranged on the sides where the two groups of folding plates are close to each other. The two ends of the connecting rod mechanism are respectively fixedly arranged on the connecting plate of the first folding mechanism and the connecting plate of the second folding mechanism.

[0008] Optionally, a first hinge axis is respectively arranged on both sides of the connecting plate and between the two groups of folding plates, a second hinge axis is respectively arranged on both sides of the locking mechanism and between the two groups of supporting mechanisms, a hinge portion is provided on the connecting plate of the first folding mechanism facing the connecting rod mechanism, a third hinge axis is respectively arranged between the two groups of hinge portions and the two groups of supporting mechanisms, and when the first folding mechanism and the second folding mechanism are synchronously contracted to the maximum limit, the first hinge axis, the second hinge axis and the third hinge axis are arranged in the same plane.

[0009] Optionally, an installation cavity is provided in the middle of the frame module, a battery circuit module is provided inside the installation cavity, a protective cover plate is provided at the position of the frame module corresponding to the installation cavity, a control module is provided on the top of the frame module, and the control module and the battery circuit module, as well as the battery circuit module and the wheel module are electrically connected through preset wires, and the wires are provided inside the frame module.

[0010] Optionally, the foot pedal module includes a mounting frame, a foot pedal, a locking latch and a first elastic member, a mounting slot is provided on the front side of the frame module, a mounting portion that is plugged into and matched with the mounting slot is provided at one end of the mounting frame, the foot pedal is provided at an end of the mounting frame away from the mounting portion and is used for a user to step on, the locking latch is slidably arranged inside the frame module, the first elastic member is fixedly arranged between the frame module and the locking latch and is used to push the locking latch to slide until it abuts against the mounting frame, the mounting frame is provided with a locking slot that is plugged into and matched with the locking latch, and when the mounting portion is fully inserted into the mounting slot, the locking latch is inserted into the locking slot.

[0011] Optionally, the locking mechanism includes a sliding seat, a movable latch and a second elastic member, the sliding seat is slidably arranged outside the connecting rod mechanism, the movable latch is slidably arranged inside the sliding seat, the second elastic member is arranged between the sliding seat and the movable latch and is used to push the movable latch to slide until it abuts against the outside of the connecting rod mechanism, the connecting rod mechanism is provided with a locking hole that is mutually engaged and adapted with the movable latch, and when the sliding seat slides to a predetermined position of the connecting rod mechanism, the movable latch 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 arranged inside the connecting rod mechanism, the unlocking head is arranged at one end of the unlocking push rod, and the unlocking head is provided with an inclined wedge surface, the handle assembly is arranged at an 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 inclined wedge surface pushes the movable latch to exit the locking hole.

[0012] Optionally, the handle assembly includes an unlocking handle, an alignment push rod, a third elastic member and a fourth elastic member, the unlocking handle being slidably arranged at an end of the connecting rod mechanism away from the first folding mechanism, the alignment push rod being fixedly arranged at an end of the unlocking push rod away from the unlocking head, the unlocking handle being provided with a rotating groove adapted to the rotation of the alignment push rod, and the bottom of the rotating groove being provided with an avoidance groove adapted to the sliding of the alignment push rod, the third elastic member being arranged between the unlocking handle and the connecting rod mechanism and being used to push the unlocking handle to slide in a direction away from the alignment push rod so that the alignment push rod is located inside the rotating groove, and the fourth elastic member being arranged between the unlocking handle and the connecting rod mechanism and being used to drive the unlocking handle to rotate along the axis of the connecting rod mechanism so that the alignment push rod and the avoidance groove are aligned with each other.

[0013] Optionally, the fourth elastic member includes a reset ring, a reset slider and a reset spring, the inner circumference of the reset ring is slidably arranged 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 sliding teeth that mesh with each other, so that the unlocking handle has the freedom to slide in a direction away from the positioning push rod, the reset slider is fixedly arranged on the outer circumference of the reset ring, the inner circumference of the connecting rod mechanism is provided with a reset groove distributed along the axis of the connecting rod mechanism, the reset slider is slidably arranged in the reset groove, and the reset spring is arranged between the reset groove and the reset slider and is used to drive the reset ring to rotate along the axis of the connecting rod mechanism.

[0014] Optionally, an anti-loosening mechanism is arranged between the fourth elastic member and the locking mechanism, and the anti-loosening mechanism includes a fixed tube, a sliding rod and an anti-loosening ring, the fixed tube extends along the axial direction of the connecting rod mechanism, and the fixed tube is fixedly arranged on the inner periphery of the connecting rod mechanism, the sliding rod is slidably arranged on the inner periphery of the fixed tube, the anti-loosening ring is fixedly arranged on one end of the sliding rod, and a sliding ball is arranged on the end of the sliding rod away from the anti-loosening ring, the reset ring is provided with a propulsion groove distributed along the axis of the connecting rod mechanism, the sliding ball is slidably arranged in the propulsion groove, and when the reset ring rotates along the axis of the connecting rod mechanism to align the positioning push rod and the avoidance groove with each other, the sliding ball drives the anti-loosening ring to abut against the movable pin through the sliding rod.

[0015] Optionally, the anti-loosening mechanism is configured with two groups, the locking mechanism is configured with two groups, and the two anti-loosening mechanisms and the two locking mechanisms are arranged staggered with each other along the axial direction of the connecting rod mechanism.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: When the electric wheelchair needs to be packaged for transportation / daily carrying, the handle assembly pushes the unlocking head to slide through the unlocking push rod, and uses the inclined wedge surface of the unlocking head to push the movable pin out of the locking hole, thereby releasing the card-locking relationship between the locking mechanism and the connecting rod mechanism, allowing the first folding mechanism and the second folding mechanism to be folded and shrunk, so that the two sets of frame modules are compressed close to each other, and the seat module is folded and shrunk, so as to reduce the size of the electric wheelchair and facilitate packaging and transportation / daily carrying. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the overall structure of this application.

[0018] Figure 2 It is a schematic diagram of the position of the folding module in this application.

[0019] Figure 3 It is a structural cross-sectional view of the frame module in this application.

[0020] Figure 4 It is a structural cross-sectional view of the foot pedal module in this application.

[0021] Figure 5 It is a cross-sectional view of the overall structure of this application.

[0022] Figure 6 It is a structural stereogram of the folding module in the present application in the unfolded state.

[0023] Figure 7 It is a structural stereogram of the folding module in the folding process in this application.

[0024] Figure 8 It is a structural cross-sectional view of the folding module in Example 1 of the present application.

[0025] Fig. 9 It is a vertical cross-sectional view of the structure of the folding module in the second embodiment of the present application.

[0026] Fig.10 It is a structural horizontal cross-sectional view of the folding module in the second embodiment of the present application.

[0027] Fig.11 It is a vertical cross-sectional view of the fourth elastic member in the second embodiment of the present application.

[0028] Fig.12 It is a transverse cross-sectional view of the fourth elastic member in the second embodiment of the present application.

[0029] Description of reference numerals: 1. frame module; 2. seat module; 3. wheel module; 4. pedal module; 41. mounting frame; 42. pedal; 43. locking latch; 44. first elastic member; 45. mounting groove; 46. mounting portion; 47. locking groove; 5. folding module; 51. first folding mechanism; 52. second folding mechanism; 53. connecting rod mechanism; 54. locking mechanism; 541. sliding seat; 542. movable latch; 543. second elastic member; 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 member; 5534, fourth elastic member; 5535, rotating groove; 5536, avoidance groove; 554, inclined wedge surface; 56, supporting mechanism; 61, folding plate; 62, connecting plate; 71, first hinge axis; 72, second hinge axis; 73, third hinge axis; 81, mounting cavity; 82, battery circuit module; 83, protective cover; 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, pushing slide groove; 111, handle portion; 112, sliding rod portion; 113, linkage portion. DETAILED DESCRIPTION

[0030] The following is combined with Figures 1 to 6 This application is described in further detail.

[0031] The present application discloses a foldable electric wheelchair.

[0032] Embodiment 1: Reference Figure 1-3The foldable electric wheelchair includes a frame module 1, a seat module 2, a wheel module 3, a pedal module 4 and a folding module 5; wherein, the frame module 1 is configured with two groups, the two groups of frame modules 1 are symmetrically spaced, and the two groups of frame modules 1 are designed in an integrated manner using carbon fiber materials, so that the frame modules 1 have light weight and high strength performance; the seat module 2 is fixedly arranged between the two groups of frame modules 1, and the seat module 2 is designed with foldable fabric, so that the seat module 2 can not only be used for users to sit, but also can be folded and stored; the wheel module 3 is fixedly arranged at the bottom of the two groups of frame modules 1, and the wheel module 3 adopts an electric wheel mode, and the user controls The wheel module 3 can drive the frame module 1 and the electric wheelchair as a whole to move; the pedal module 4 is fixedly arranged on the front side of the two groups of frame modules 1, and the pedal module 4 is installed and fixed with a detachable structure, so that the pedal module 4 can be installed on the front side of the frame module 1 according to the actual needs of the user for the user to step on; the folding module 5 is arranged between the two groups of frame modules 1, and the folding module 5 has the function of expanding or contracting, so that the folding module 5 can not only drive the two groups of frame modules 1 to expand each other for use, but also drive the two groups of frame modules 1 to contract each other to reduce the overall volume of the electric wheelchair, thereby facilitating the overall packaging, transportation and daily carrying of the electric wheelchair.

[0033] The wheel module 3 specifically includes two groups of electric wheels and two groups of ordinary wheels. The electric wheels and the ordinary wheels are both disclosed in the prior art and will not be described in detail here. The two groups of electric wheels are respectively fixedly arranged on the rear sides of the two groups of frame modules 1, and the two groups of ordinary wheels are respectively fixedly arranged on the front sides of the two groups of frame modules 1, so that the wheel module 3 can drive the frame module 1 and the electric wheelchair to move as a whole. In addition, an installation cavity 81 is provided in the middle of the frame module 1, and a battery circuit module 82 is arranged inside the installation cavity 81. A protective cover plate 83 is provided at the position of the frame module 1 corresponding to the installation cavity 81, and a control module 84 is provided on the top of the frame module 1. The battery circuit module 82 and the control module are both 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 through preset wires, and the wires are arranged inside the frame module 1. The user inputs instructions through the control module 84, the battery circuit module 82 receives the instructions and controls the wheel module 3 to perform corresponding actions, so that the wheel module 3 can drive the frame module 1 and the electric wheelchair as a whole to achieve forward, backward, turn and other actions, and the wires are distributed inside the frame module 1 with an integrated structure, which is beneficial to protect the wires and avoid damage to the wires during the folding process of the electric wheelchair.

[0034] The pedal module 4 specifically includes a mounting frame 41, a foot pedal 42, a locking pin 43 and a first elastic member 44; wherein, a mounting slot 45 with an opening inclined upward is provided at the front side of the frame module 1, the mounting frame 41 is a bent rod structure made of carbon fiber material, and a mounting portion 46 that is plugged and adapted to the mounting slot 45 is integrally formed and fixedly provided at the top of the mounting frame 41, the foot pedal 42 is fixedly provided at one end of the mounting frame 41 away from the mounting portion 46 and is used for the user to step on, the locking pin 43 is slidably penetrated and provided inside the frame module 1, and the first elastic member 44 is compressed The first elastic member 44 is fixedly arranged between the frame module 1 and the locking pin 43, and the first elastic member 44 is used to push the locking pin 43 to slide to abut against the mounting frame 41, and the mounting frame 41 is provided with a locking groove 47 that is mutually engaged and adapted with the locking pin 43, and when the mounting portion 46 is fully inserted into the mounting groove 45, the locking pin 43 is inserted into the locking groove 47, so that the locking pin 43 is used to detachably lock the mounting frame 41, so that the foot module 4 can be installed on the front side of the frame module 1 according to the actual needs of the user for the user to step on.

[0035] The folding module 5 specifically 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; wherein, the first folding mechanism 51 and the second folding mechanism 52 have the same overall structure, both are arranged between the two groups of frame modules 1 and arranged at intervals, and both have the function of expanding or contracting; specifically, the first folding mechanism 51 and the second folding mechanism 52 each include two groups of folding plates 61 and a connecting plate 62, the two groups of folding plates 61 are symmetrically arranged at intervals, the two groups of folding plates 61 are hingedly arranged on the two groups of frame modules 1 at one side away from each other, and the two sides of the connecting plate 62 are hingedly arranged on the side where the two groups of folding plates 61 are close to each other, and the folding function of the first folding mechanism 51 and the second folding mechanism 52 can be realized by controlling the two groups of folding plates 61 to expand or contract synchronously relative to the connecting plate 62.

[0036] The connecting rod mechanism 53 is a metal circular tube structure, and the two ends of the connecting rod mechanism 53 are respectively vertically fixed on the connecting plate 62 of the first folding mechanism 51 and the connecting plate 62 of the second folding mechanism 52. When the connecting rod mechanism 53 drives the two connecting plates 62 to move synchronously, the two groups of folding plates 61 of the first folding mechanism 51 and the two groups of folding plates 61 of the second folding mechanism 52 are synchronously expanded or retracted, thereby realizing the synchronous expansion or retraction of the first folding mechanism 51 and the second folding mechanism 52.

[0037] The locking mechanism 54 is slidably arranged outside the connecting rod mechanism 53, and a supporting mechanism 56 is hingedly arranged between the locking mechanism 54 and the first folding mechanism 51. 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 engaged and locked, so that the locking mechanism 54 pushes the first folding mechanism 51 to maintain the unfolded state through the supporting mechanism 56. Specifically, the locking mechanism 54 includes a sliding seat 541, a movable latch 542 and a second elastic member 543. The sliding seat 541 is slidably arranged outside the connecting rod mechanism 53, and the supporting mechanism 56 is a metal supporting rod structure and is configured with two groups. One end of the two groups of supporting mechanisms 56 is respectively hingedly arranged on both sides of the sliding seat 541. The other ends of the two groups of support mechanisms 56 are respectively hinged to the two groups of folding plates 61 of the first folding mechanism 51, and a spring cavity is arranged inside the sliding seat 541. The movable latch 542 slides through the spring cavity arranged inside the sliding seat 541. The second elastic member 543 adopts a compression spring structure. The second elastic member 543 is arranged in the spring cavity inside the sliding seat 541, and the second elastic member 543 abuts against the movable latch 542 to push the movable latch 542 to slide until it abuts against the outside of the connecting rod mechanism 53. The connecting rod mechanism 53 is provided with a locking hole 544 which is mutually engaged and adapted with the movable latch 542, and when the sliding seat 541 slides to a predetermined position of the connecting rod mechanism 53, the movable latch 542 is inserted into the locking hole 544. When the sliding seat 541 slides to the predetermined position of the connecting rod mechanism 53, the sliding seat 541 is locked by the snap-fitting cooperation between the movable latch 542 and the locking hole 544. At this time, the sliding seat 541 supports and unfolds the two groups of folding plates 61 of the first folding mechanism 51 through the supporting mechanism 56, so that a stable triangular structure is formed among the first folding mechanism 51, the supporting mechanism 56, and the connecting rod mechanism 53, thereby achieving the effect of the locking mechanism 54 pushing the first folding mechanism 51 to maintain the unfolded state through the supporting mechanism 56.

[0038] The unlocking mechanism 55 is slidably arranged inside the connecting rod mechanism 53, and the unlocking mechanism 55 is used to release the card-locking relationship between the locking mechanism 54 and the connecting rod mechanism 53, so that the locking mechanism 54 can restore the freedom to slide relative to the connecting rod 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 arranged inside the connecting rod mechanism 53 through a preset sliding support, the unlocking head 552 is located near the position of the locking hole 544, the unlocking head 552 is fixedly arranged at one end of the unlocking push rod 551, and the unlocking head 552 is provided with an inclined wedge surface 554, the inclined wedge surface 554 can push the movable latch 542 to overcome the elastic force of the second elastic member 543 to slide, so that the inclined wedge surface 554 can push the movable latch 542 to exit the locking hole 544, the handle assembly 553 is arranged 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 connecting rod 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 to exit the locking hole 544, thereby releasing the locking relationship between the locking mechanism 54 and the connecting rod mechanism 53, so that the first folding mechanism 51 and the second folding mechanism 52 can be folded and contracted.

[0039] Implementation principle: When the electric wheelchair is needed, the sliding seat 541 is manually pushed to slide on the connecting rod mechanism 53 in the direction close to the first folding mechanism 51. When the sliding seat 541 slides to the predetermined position of the connecting rod mechanism 53, the movable latch 542 and the locking hole 544 are aligned, and the movable latch 542 is pushed by the second elastic member 543 to be inserted into the locking hole 544. At this time, the sliding seat 541 supports and unfolds the two groups of folding plates 61 of the first folding mechanism 51 through the supporting mechanism 56, so that the first folding mechanism 51, the supporting mechanism 56, and the connecting rod mechanism 53 form a stable triangular structure, so that the locking mechanism 54 pushes the first folding mechanism 51 to maintain the unfolded state through the supporting mechanism 56. At the same time, the connecting rod mechanism 53 pushes the second folding mechanism 52 in the opposite direction to maintain the unfolded state, so that the two groups of frame modules 1 and the seat module 2 remain in the unfolded state for the user to sit down. When the electric wheelchair needs to be packaged for transportation / daily carrying, the handle assembly 553 pushes the unlocking head 552 to slide through the unlocking push rod 551, and uses the inclined wedge surface 554 of the unlocking head 552 to push the movable pin 542 out of the locking hole 544, thereby releasing the card-locking relationship between the locking mechanism 54 and the connecting rod mechanism 53, so that the first folding mechanism 51 and the second folding mechanism 52 can be folded and shrunk, so that the two groups of frame modules 1 are compressed close to each other, and the seat module 2 is folded and shrunk, so as to reduce the volume of the electric wheelchair and facilitate packaging and transportation / daily carrying.

[0040] In this embodiment, first hinge shafts 71 are respectively arranged on both sides of the connecting plate 62 and between the two groups of folding plates 61, second hinge shafts 72 are respectively arranged on both sides of the locking mechanism 54 and between the two groups of supporting mechanisms 56, and a protruding hinge portion is fixedly arranged on the connecting plate 62 of the first folding mechanism 51 toward the side of the connecting rod mechanism 53, and third hinge shafts 73 are respectively arranged between the two groups of hinge portions and the two groups of supporting mechanisms 56, and the spacing between the first hinge shaft 71 and the connecting rod mechanism 53, the spacing between the second hinge shaft 72 and the connecting rod mechanism 53, and the spacing 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 contracted to the maximum limit, the first hinge shaft 71, the second hinge shaft 72, and the third hinge shaft 73 are arranged in the same plane.

[0041] Embodiment 2: The difference between Example 1 and Example 2 is that in Example 1, the handle assembly 553 can be directly pushed to push the unlocking head 552 to slide, thereby completing the unlocking process simply, while in Example 1, the handle assembly 553 needs to be rotated to a certain angle before the unlocking head 552 can be pushed to slide through the unlocking push rod 551, so as to avoid the situation where the locking relationship between the locking mechanism 54 and the connecting rod mechanism 53 is released due to accidental touching of the handle assembly 553; both have their own advantages.

[0042] The handle assembly 553 specifically includes an unlocking handle 5531, an alignment push rod 5532, a third elastic member 5533 and a fourth elastic member 5534; wherein the unlocking handle 5531 includes a handle portion 111, a slide rod portion 112 and a linkage portion 113 connected in sequence, the slide rod portion 112 of the unlocking handle 5531 is slidably penetrated and arranged at the end of the connecting rod mechanism 53, so that the unlocking handle 5531 has the freedom to rotate and slide along the axis of the connecting rod mechanism 53, the alignment push rod 5532 is close to a T-shaped structure, and the alignment push rod The tail of 5532 is fixedly arranged at the end of the unlocking push rod 551 away from the unlocking head 552, and the linkage part 113 of the unlocking handle 5531 is provided with a rotating groove 5535 which is adapted to rotate with the head of the alignment push rod 5532, that is, the head of the alignment push rod 5532 can rotate freely inside the rotating groove 5535, and the bottom of the rotating groove 5535 is provided with an avoidance groove 5536 which is adapted to slide with the head of the alignment push rod 5532, and as the unlocking handle 5531 rotates to the avoidance groove 5536 and is aligned with the head of the alignment push rod 5532, the unlocking The locking handle 5531 and the alignment push rod 5532 slide relative to each other, and the unlocking handle 5531 cannot push the alignment push rod 5532. As the unlocking handle 5531 rotates until the avoidance groove 5536 is offset from the head of the alignment push rod 5532, the unlocking handle 5531 and the alignment push rod 5532 slide synchronously, and the unlocking handle 5531 can push the alignment push rod 5532. The third elastic member 5533 adopts a compression spring structure. The third elastic member 5533 is arranged between the unlocking handle 5531 and the connecting rod mechanism 53, and the third elastic member 5533 is arranged between the unlocking handle 5531 and the connecting rod mechanism 53. The elastic member 5533 is used to push the unlocking handle 5531 to slide in the direction away from the alignment push rod 5532, so that the head of the alignment push rod 5532 slides to be located inside the rotating groove 5535; the fourth elastic member 5534 is similar to a torsion spring structure as a whole. The fourth elastic member 5534 is arranged between the linkage part 113 of the unlocking handle 5531 and the connecting rod mechanism 53, and the fourth elastic member 5534 is used to drive the unlocking handle 5531 to rotate along the axis of the connecting rod mechanism 53, so that the alignment push rod 5532 and the avoidance groove 5536 are aligned with each other.

[0043] The fourth elastic member 5534 specifically includes a reset ring 91, a reset slider 92 and a reset spring 93; wherein, the inner periphery of the reset ring 91 is slidably arranged on the outer periphery of the linkage portion 113 of the unlocking handle 5531, and the inner periphery of the reset ring 91 and the outer periphery of the linkage portion 113 of the unlocking handle 5531 are provided with sliding teeth 94 that mesh with each other, so that the unlocking handle 5531 has the freedom to slide in a direction away from the positioning push rod 5532, and on this basis, the linkage portion 113 of the unlocking handle 5531 can also drive the reset ring 91 to rotate; the reset slider 92 is fixedly arranged on the outer periphery of the reset ring 91, and the inner periphery of the connecting rod mechanism 53 is provided with a reset slide groove 95 distributed along the axis of the connecting rod mechanism 53, the reset slider 92 is slidably arranged in the reset slide groove 95, and the reset spring 93 adopts a compression spring structure, and the reset spring 93 is fixedly arranged between the reset slide groove 95 and the reset slider 92 and is used to drive the reset ring 91 to rotate along the axis of the connecting rod mechanism 53.

[0044] When the handle assembly 553, the unlocking push rod 551 and the unlocking head 552 are needed to push the movable latch 542 out of the locking hole 544, the unlocking handle 5531 is first rotated 90 degrees to rotate the avoidance groove 5536 to stagger with the head of the alignment push rod 5532, and then the unlocking handle 5531 is pushed. Since the unlocking handle 5531 and the alignment push rod 5532 form a conflicting relationship, the unlocking handle 5531 pushes the alignment push rod 5532 to slide synchronously, so that the unlocking push rod 551 pushes the unlocking head 5531. 52 slides, thereby realizing that the inclined wedge surface 554 of the unlocking head 552 pushes the movable latch 542 out of the locking hole 544, thereby releasing the locking relationship between the locking mechanism 54 and the connecting rod mechanism 53; on the contrary, if the unlocking handle 5531 is directly pushed, the avoidance groove 5536 of the unlocking handle 5531 is aligned with the head of the alignment push rod 5532, and the unlocking handle 5531 and the alignment push rod 5532 will slide relative to each other, and the unlocking handle 5531 will not be able to push the alignment push rod 5532. By rotating the unlocking handle 5531 first and then pushing it, it is possible to effectively prevent a child or a user from accidentally touching the unlocking handle 5531, which will cause the locking relationship between the locking mechanism 54 and the connecting rod mechanism 53 to be released.

[0045] In this embodiment, an anti-loosening mechanism 10 is arranged between the fourth elastic member 5534 and the locking mechanism 54. The anti-loosening mechanism 10 can assist in abutting against the movable latch 542 when the folding module 5 is in the unfolded state. Even if the elastic force of the second elastic member 543 fails, it can still assist the movable latch 542 to maintain a stable clamping relationship in the locking hole 544.

[0046] The anti-loosening mechanism 10 specifically includes a fixed tube 101, a sliding rod 102 and an anti-loosening ring 103; wherein the fixed tube 101 extends along the axial 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 slidably penetrated and arranged on the inner periphery of the fixed tube 101, one end of the sliding rod 102 extends to the side of the movable latch 542 away from the unlocking head 552, and the anti-loosening ring 103 adopts a rubber ring structure, and the anti-loosening ring 103 is also located on the side of the movable latch 542 away from the unlocking head 552 and is fixedly arranged on the sliding rod 102, and the sliding rod 102 is fixedly arranged on the inner periphery of the fixed tube 101. A sliding ball 104 is provided at one end of the movable rod 102 away from the anti-loosening ring 103, and 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 propulsion groove 105 distributed along the axis of the connecting rod mechanism 53, and the bottom of the propulsion groove 105 is a lifting wedge surface. The sliding ball 104 is slidably set in the propulsion groove 105, and when the reset ring 91 rotates along the axis of the connecting rod mechanism 53 to align the positioning push rod 5532 and the avoidance groove 5536 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.

[0047] When there is no other external force acting on the folding mechanism, the third elastic member 5533 pushes the unlocking handle 5531 to slide and reset in the direction away from the positioning push rod 5532, and the fourth elastic member 5534 drives the unlocking handle 5531 to rotate and reset along the axis of the connecting rod mechanism 53. With the rotation of the reset ring 91, the sliding ball 104 slides along the lifting wedge surface at the bottom of the pushing slide groove 105, and drives the anti-loosening ring 103 to move to the locking hole 544 position through the sliding rod 102. With the folding mechanism unfolding and the movable latch 542 inserted into the locking hole 544 under the elastic force of the second elastic member 543, the anti-loosening ring 103 abuts against the side of the movable latch 542 away from the unlocking head 552, so that the anti-loosening ring 103 can assist in abutting against the movable latch 542 in the unfolded state of the folding module 5, and cooperate with the second elastic member 543 to improve the clamping stability of the movable latch 542 in the locking hole 544. When it is necessary to use the handle assembly 553, the unlocking push rod 551, and the 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, and the sliding ball 104 slides along the lifting wedge surface at the bottom of the thrust slide groove 105, and pushes the anti-loosening ring 103 to move away from the movable pin 542 through the sliding rod 102. At this time, pushing the unlocking handle 5531 again can release the card-locking relationship between the locking mechanism 54 and the connecting rod mechanism 53.

[0048] In this embodiment, two groups of anti-loosening mechanisms 10 are configured, and two groups of locking mechanisms 54 are configured, and the two groups of anti-loosening mechanisms 10 and the two groups of locking mechanisms 54 are staggered along the axial direction of the connecting rod mechanism 53. The structural reliability is improved by increasing the number of anti-loosening mechanisms 10 and locking mechanisms 54.

[0049] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A foldable electric wheelchair, characterized in that: include The frame modules (1) are configured in two groups, and the two groups of frame modules (1) are arranged at intervals; A seat module (2), the seat module (2) is arranged between the two sets of frame modules (1) and is used for users to sit on; A wheel module (3), the wheel module (3) is arranged at the bottom of the two sets of frame modules (1) and is used to drive the frame modules (1) to move; A pedal module (4), the pedal module (4) being arranged at the front side of the two sets of frame modules (1) and being used for a user to step on; A folding module (5), the folding module (5) comprising 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 both arranged between two sets of frame modules (1), the connecting rod mechanism (53) is arranged between the first folding mechanism (51) and the second folding mechanism (52) and enables the first folding mechanism (51) and the second folding mechanism (52) to be synchronously expanded or folded, and the locking mechanism (54) is slidably arranged on the connecting rod mechanism (53), a support 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 engaged and locked, so that the locking mechanism (54) pushes the first folding mechanism (51) to maintain the unfolded state through the support mechanism (56), and the unlocking mechanism (55) is slidably arranged inside the connecting rod mechanism (53) and is used to release the engaged and locked relationship between the locking mechanism (54) and the connecting rod mechanism (53).

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

3. A foldable electric wheelchair according to claim 2, characterized in that: A first hinge shaft (71) is respectively arranged on both sides of the connecting plate (62) and between the two groups of folding plates (61); a second hinge shaft (72) is respectively arranged on both sides of the locking mechanism (54) and between the two groups of supporting mechanisms (56); a hinge portion is arranged on the connecting plate (62) of the first folding mechanism (51) toward the connecting rod mechanism (53); a third hinge shaft (73) is respectively arranged between the two groups of hinge portions and the two groups of supporting mechanisms (56); and when the first folding mechanism (51) and the second folding mechanism (52) are synchronously retracted to the maximum limit, the first hinge shaft (71), the second hinge shaft (72) and the third hinge shaft (73) are arranged in the same plane.

4. A foldable electric wheelchair according to claim 1, characterized in that: The frame module (1) is provided with an installation cavity (81) in the middle, a battery circuit module (82) is provided inside the installation cavity (81), a protective cover plate (83) is provided at a position of the frame module (1) corresponding to the installation cavity (81), a control module (84) is provided on the top of the frame module (1), the control module (84) and the battery circuit module (82), and the battery circuit module (82) and the wheel module (3) are electrically connected via preset wires, and the wires are provided inside the frame module (1).

5. A foldable electric wheelchair according to claim 1, characterized in that: The pedal module (4) comprises a mounting frame (41), a foot pedal (42), a locking latch (43) and a first elastic member (44); a mounting groove (45) is arranged on the front side of the frame module (1); a mounting portion (46) which is plugged and matched with the mounting groove (45) is arranged at one end of the mounting frame (41); the foot pedal (42) is arranged at one end of the mounting frame (41) away from the mounting portion (46) and is used for being stepped on by a user; the locking latch (43) is slidably arranged inside the frame module (1); the first elastic member (44) is fixedly arranged between the frame module (1) and the locking latch (43) and is used for pushing the locking latch (43) to slide to abut against the mounting frame (41); the mounting frame (41) is provided with a locking groove (47) which is plugged and matched with the locking latch (43); and when the mounting portion (46) is fully inserted into the mounting groove (45), the locking latch (43) is inserted into the locking groove (47).

6. A foldable electric wheelchair according to claim 1, characterized in that: The locking mechanism (54) comprises a sliding seat (541), a movable latch (542) and a second elastic member (543); the sliding seat (541) is slidably arranged outside the connecting rod mechanism (53); the movable latch (542) is slidably arranged inside the sliding seat (541); the second elastic member (543) is arranged between the sliding seat (541) and the movable latch (542) and is used to push the movable latch (542) to slide to abut against the outside of the connecting rod mechanism (53); the connecting rod mechanism (53) is provided with a locking hole (544) which is mutually engaged with the movable latch (542); and when the sliding seat (541) slides to a predetermined position of the connecting rod mechanism (53), the movable latch (542) is locked. The movable latch (542) is inserted into the locking hole (544); the unlocking mechanism (55) comprises 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), and the unlocking head (552) is provided with an inclined wedge surface (554); the handle assembly (553) is arranged at one 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, so that the inclined wedge surface (554) pushes the movable latch (542) out of the locking hole (544).

7. A foldable electric wheelchair according to claim 6, characterized in that: The handle assembly (553) comprises an unlocking handle (5531), an alignment push rod (5532), a third elastic member (5533) and a fourth elastic member (5534); the unlocking handle (5531) is slidably arranged at an end of the connecting rod mechanism (53) away from the first folding mechanism (51); the alignment push rod (5532) is fixedly arranged at an end of the unlocking push rod (551) away from the unlocking head (552); the unlocking handle (5531) is provided with a rotating groove (5535) which is rotationally adapted to the alignment push rod (5532); and the bottom of the rotating groove (5535) is provided with a groove which is adapted to rotate with the alignment push rod (5532). 2) a slidingly adapted avoidance groove (5536), wherein the third elastic member (5533) is disposed between the unlocking handle (5531) and the connecting rod mechanism (53) and is used to push the unlocking handle (5531) to slide in a direction away from the alignment push rod (5532) so that the alignment push rod (5532) is located inside the rotation groove (5535), and the fourth elastic member (5534) is disposed between the unlocking handle (5531) and the connecting rod mechanism (53) and is used to drive the unlocking handle (5531) to rotate along the axis of the connecting rod mechanism (53) so that the alignment push rod (5532) and the avoidance groove (5536) are aligned with each other.

8. A foldable electric wheelchair according to claim 7, characterized in that: The fourth elastic member (5534) includes a reset ring (91), a reset slider (92) and a reset spring (93). The inner periphery of the reset ring (91) is slidably arranged on the outer periphery of the unlocking handle (5531), and the inner periphery of the reset ring (91) and the outer periphery of the unlocking handle (5531) are provided with sliding teeth (94) that mesh with each other, so that the unlocking handle (5531) has the freedom to slide in a direction away from the positioning push rod (5532). The reset slider (92) is fixedly arranged on the outer periphery of the reset ring (91). The inner periphery of the connecting rod mechanism (53) is provided with a reset slide groove (95) distributed along the axis of the connecting rod mechanism (53). The reset slider (92) is slidably arranged in the reset slide groove (95). The reset spring (93) is arranged between the reset slide groove (95) and the reset slider (92) and is used to drive the reset ring (91) to rotate along the axis of the connecting rod mechanism (53).

9. A foldable electric wheelchair according to claim 8, characterized in that: An anti-loosening mechanism (10) is arranged between the fourth elastic member (5534) and the locking mechanism (54), and the anti-loosening mechanism (10) comprises a fixed tube (101), a sliding rod (102) and an anti-loosening ring (103), wherein the fixed tube (101) extends along the axial 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 slidably arranged on the inner periphery of the fixed tube (101), and the anti-loosening ring (103) is fixedly arranged on one end of the sliding rod (102), and the sliding rod (102) is fixedly arranged on the inner periphery of the fixed tube (101). (102) A sliding ball (104) is provided at one end away from the anti-loosening ring (103), and the reset ring (91) is provided with a propulsion groove (105) distributed along the axis of the connecting rod mechanism (53). The sliding ball (104) is slidably arranged in the propulsion groove (105), and when the reset ring (91) rotates along the axis of the connecting rod mechanism (53) to align the positioning push rod (5532) and the avoidance groove (5536) with each other, the sliding ball (104) drives the anti-loosening ring (103) to abut against the movable latch (542) through the sliding rod (102).

10. A foldable electric wheelchair according to claim 9, characterized in that: The anti-loosening mechanism (10) is configured in two groups, and the locking mechanism (54) is configured in two groups, and the two anti-loosening mechanisms (10) and the two locking mechanisms (54) are arranged staggered with each other along the axial direction of the connecting rod mechanism (53).

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