WO2019242063A1 - Folding electric wheelchair - Google Patents

Abstract

A folding electric wheelchair, comprising: a front frame (1), a rear frame (2), a seat (3), seat joints (4), a folding locking assembly (5), folding fixing pieces (6), a lower surrounding frame (7), and folding guide rail pieces (8). The folding guide rail pieces (8), the folding fixing pieces (6), and the folding locking assembly (5) are used to lock and unlock a folding state of the wheelchair, and the stability and firmness of locking is improved by means of insertion holes. The folding guide rail pieces (8) are used to improve the load bearing capability of whole wheelchair and correct and limit the movement direction and position of the folding locking assembly (5) in time, thereby implementing convenient, quick and stable use.

Description

Folding electric wheelchair Technical field

The invention relates to the field of wheelchairs and accessories, and in particular to a folding electric wheelchair.

Background technique

Wheelchairs are mobility tools and commonly used medical rehabilitation equipment for the physically disabled and people with reduced mobility. They are also used by users to exercise and participate in social activities. Generally wheelchairs can be folded to facilitate the use of users.

However, at present, wheelchairs use the movement of the connecting piece in the chute to control the folding. However, this structure is liable to cause the connecting piece to become stuck or loose during use, resulting in failure to fold or unfold. Some wheelchairs use The electric drive device is used for folding, but this not only increases the weight of the wheelchair, but also greatly increases the production cost of the wheelchair, which brings a lot of inconvenience to the user.

Summary of the Invention

The technical problem mainly solved by the present invention is to provide a folding electric wheelchair, which has the advantages of high reliability, convenient use, and good folding effect. At the same time, it has a broad market prospect in the application and popularization of wheelchairs and their accessories.

To solve the above technical problems, a technical solution adopted by the present invention is:

Provided is a folding electric wheelchair, which includes: a front frame, a rear frame, a seat, a seat joint, a folding lock assembly, a folding fixing piece, a lower frame, and a folding, bearing, guiding and limiting of the folding lock assembly. Rail piece,

The bottom of the front frame is movably connected to the front wheel, the top of the front frame is connected to the seat through the seat joint, and the rear end of the seat is connected to the rear frame. The bottom of the rear frame is movably disposed on the driving rear wheels, and the lower enclosure frame is connected to the front frame and the rear frame, respectively, and is close to the lower enclosure frame of the rear frame. The end is provided with the folding fixing piece, the top of the folding fixing frame is provided with a folding hole and an unfolding hole, the unfolding hole is provided with the folding guide piece, and the folding locking assembly is provided at two through connecting rods. Between the rear frames, two ends of the folding lock assembly are movably connected to the folding hole or the unfolding hole, so that the wheelchair can be locked and unlocked by folding.

In a preferred embodiment of the present invention, the folding lock assembly is movably connected to the folding hole or the unfolding hole through extension and indentation at both ends, so that the wheelchair can be locked and unlocked by folding.

In a preferred embodiment of the present invention, when folding and locking, both ends of the folding and locking assembly are extended through the folding rail piece and connected to the deployment hole, or both ends of the folding and locking assembly are extended. Connected with the folding hole; when the folding is unlocked, both ends of the folding locking component are retracted away from the folding hole or the unfolding hole.

In a preferred embodiment of the present invention, the folding rail piece has a U-shaped structure.

In a preferred embodiment of the present invention, a backrest is provided on the top of the rear frame, and an adjustment device for steplessly adjusting the angle of the backrest is provided between the backrest and the rear frame.

In a preferred embodiment of the present invention, both sides of the seat are provided with an armrest frame that can move up and down and an armrest located on the armrest frame, and the armrest moves back and forth on the armrest frame.

In a preferred embodiment of the present invention, a height-adjustable headrest is provided on the top of the backrest.

In a preferred embodiment of the present invention, a footrest is provided at an end of the lower enclosure frame near the front frame, and the footrest is foldably connected to the lower enclosure frame, and the lower enclosure frame The lower frame joint is used for limiting the folding angle of the pedals.

In a preferred embodiment of the present invention, a cushion support block is movably disposed between the lower enclosure frame and the seat.

In a preferred embodiment of the present invention, the folding and locking assembly includes a hollow tube, a folding link, a connecting block, a spring, a connecting sleeve, a movable hole, a connecting bolt, an unlocking pin, and the hollow tube passes through the connecting rod. Fixedly connected to the rear frame, the connecting sleeves are provided at both ends of the hollow tube, and one end of the folding link is provided in the hollow tube and connected with the connecting block, and the folding connection The other end of the rod is connected to the unlocking pin through the connecting sleeve, the spring is provided between the two connecting blocks, the movable hole is provided on the hollow tube, and the connecting bolt One end is connected to the connection block through the movable hole, and the other end is provided with a folding handle.

The beneficial effects of the present invention are: using a folding rail piece, a folding fixing piece, and a folding lock assembly to lock and unlock the folded state of the wheelchair, using a jack to improve the stability and firmness of the lock, and improving the whole vehicle by folding the rail piece The load-bearing capacity, timely correction and restriction of the movement direction and position of the folding lock assembly are convenient, fast and stable to use.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the technical solutions in the embodiments of the present invention more clearly, the drawings used in the description of the embodiments are briefly introduced below. Obviously, the drawings in the following description are just some embodiments of the present invention. For those of ordinary skill in the art, without drawing creative labor, other drawings can be obtained according to these drawings, of which:

FIG. 1 is a schematic diagram of a three-dimensional structure of a vehicle according to a preferred embodiment of a folding electric wheelchair according to the present invention; FIG.

2 is a schematic cross-sectional structure diagram of a vehicle according to a preferred embodiment of a folding electric wheelchair according to the present invention;

3 is a perspective view of a lower half of a folding electric wheelchair according to a preferred embodiment of the present invention;

4 is a schematic structural diagram of a folding lock assembly according to a preferred embodiment of a folding electric wheelchair according to the present invention;

FIG. 5 is a schematic structural diagram of a folding fixing sheet according to a preferred embodiment of a folding electric wheelchair according to the present invention; FIG.

6 is a schematic diagram of a folding structure of a folding electric wheelchair according to a preferred embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

Please refer to FIGS. 1-6. An embodiment of the present invention includes:

A main body of a folding electric wheelchair includes: a front frame 1, a rear frame 2, a seat 3, a seat joint 4, a folding lock assembly 5, a folding fixing sheet 6, a lower frame 7, and a load bearing of the folding lock assembly, Guide and limit folding rail piece 8.

The bottom of the front frame is arranged on a U-shaped or horseshoe-shaped cover frame. Both sides of the bottom of the cover frame are rotatably connected to the front wheels 9. The top of the front frame is connected to the seat through the seat joint. The rear end of the seat is connected to the rear frame. The bottom of the rear frame is movably disposed on the driving rear wheel 10, and the lower enclosure frame is connected to the front frame and The rear frame is connected, and a movable cushion support block is connected between the seat and the lower frame through a movable joint, which is used to increase the load bearing of the seat and improve the stability and safety of the wheelchair.

The end of the lower enclosure frame near the rear frame is provided with the folding fixing piece, and the top of the folding fixing frame is provided with a folding hole 16 and an unfolding hole 17, and each of the folding hole and the unfolding hole may have one A plurality of folding rail pieces having a U-shaped structure are provided on the unfolding holes. The folding rail pieces can increase the area of the folding lock component and increase the load bearing. Moreover, the grooves on the rail pieces can be used for the folding lock component. Guidance and limit positions for faster and more accurate unlocking and locking.

The folding locking assembly includes a hollow tube 51, a folding link 52, a connecting block 53, a spring 54, a connecting sleeve 55, a movable hole 56, a connecting bolt 57, an unlocking pin 58, and the hollow tube is connected with the connecting rod 18 through the connecting rod 18. The rear frame is fixedly connected, the connection sleeves are provided at both ends of the hollow tube, and one end of the folding link is disposed in the hollow tube and connected with the connection block, and the folding link The other end is connected to the unlocking pin through the connecting sleeve, the spring is provided between the two connecting blocks, the movable hole is provided on the hollow tube, and one end of the connecting bolt is It is connected to the connecting block through the movable hole, and a folding knob 59 is provided on the other end.

When folding the car, hold the two folding handles in the middle, and the connecting bolts drive the folding link to retract inward, so that the locking pins on both sides are pulled out from the expansion holes in the folding fixing piece, and the four-link mechanism is unlocked. At present, the movable joints on the surrounding frame joints, cushion joints, and cushion support blocks are unlocked. The entire vehicle can be pushed forward to unlock. When it is pushed to the folding hole on the front side of the folding fixing piece, the middle folding spring will push out the unlocking pin. Insert it into the folding hole to lock the folded car.

When unfolding the car, hold the two folding handles. Similarly, the middle link will pull the locking pins on both sides out of the folding fixing piece, and the four-link mechanism is unlocked. At this time, the lower frame joint, cushion joint, and movable joint Once again in the unlocking active state, the entire vehicle can be pulled backwards. When pulling to the folding rail piece, the processing error of the frame by the R angle of the folding rail piece is forcibly corrected into the locking hole of the folding fixing piece to complete the unlocking of the frame.

A folding electric wheelchair also includes accessories such as a backrest, a pedal, an armrest, and a headrest.

1) Backrest 13: A backrest is connected to the top of the rear frame through a joint 17, and an adjustment device for steplessly adjusting the angle of the backrest is provided between the backrest and the rear frame. The adjustment device includes an unlocking button, a gas spring, A butterfly indenter, a pressure plate, and a dual control line, the unlock button is connected to the general control end of the dual control line, the front end of the pressure plate is connected to the single control end of the dual control line, and the gas spring The top of the plate is movably connected to the butterfly indenter, the bottom of the gas spring is movably connected to the rear frame, and the unlock button moves the platen up and down by pulling the dual control line, and the platen is up and down The movement drives the gas spring valve needle to be pushed down and popped back to complete the unlocking and locking of the gas spring. The unlocking button includes a fixed seat, a button body, and an adjustment stop. The head end of the control cable and the adjustment Stoppers are connected, the button is provided on the fixed seat, the adjustment stop is rotatably provided in the fixed seat through a movable shaft, and the button body pushes the adjustment stop to rotate around the movable shaft Exercise from And the control cable is tightened or loosened by the movement of the adjustment stop, wherein the head end of the double control wire can be directly fixed on the adjustment stop, or a slot can be provided on the adjustment stop. The end of the outer shell of the control wire control end may be fixed on a fixed seat, and a fixed block is provided at the end of the pull wire provided in the outer shell, and the control pull wire is movably connected to the adjustment stop using the fixed block. The unlock button can be set in various positions on the armrest, the body, etc., to facilitate the use needs of different users.

The connecting joint is disposed on the top of the rear frame, a fan-shaped limiting groove is provided on the inner side of the connecting joint, and the bottom of the backrest is rotatably provided on the bottom of the limiting groove. The upper side of the slot limits the angle when the backrest stands up, the lower side limits the angle when the backrest is turned down, and the angle range between the backrest and the wheelchair seat is 95 °- 135 °, users can choose any comfortable angle in this range, simple operation and easy to use.

The butterfly indenter is movably connected to the backrest through the rotation shaft, the pressure plate is movably disposed between the two flaps of the butterfly indenter, and the front end of the pressure plate is an L-shape that is upwardly tilted. Structure, the single control end of the dual control line passes from the bottom to the protruding part of the bottom of the butterfly indenter, and the end of the outer shell of the single control end is fixed on the protruding part and is arranged at the end of the pull wire in the outer casing. A fixing block 10 is provided, and the pulling wire passes through a fixing groove provided at the front end of the pressing plate, and the pulling wire is locked on the pressing plate by using an L-shaped structure and a fixing block.

When the backrest angle needs to be adjusted, push the button body downwards, the button body pushes the adjustment stop to move outwards, and the dual control line is pulled upward under the movement of the adjustment stop. Because the length of the pull line in the dual control line is constant, Therefore, the pull wire of the single control end will also be tightened upward at the same time. At this time, the pressure plate is driven downward by the double control wire and presses the valve pin on the top of the gas spring. At this time, the gas spring is unlocked. Open the unlock button, adjust the stop and reset the dual control line, the dual control line at the single control end is relaxed, the pressure plate moves back upward, and the valve pin on the top of the gas spring is also ejected upward. At this time, the gas spring is locked, and the backrest is fixed to the optional Fixed angle.

2) Armrests and headrests: On both sides of the seat, there are armrest frames 11 that can move up and down, and armrests 12 on the armrest frames. The armrests move back and forth on the armrest frames, and the top of the backrest A height-adjustable headrest 14 is provided.

3) Pedal: A foot pedal is provided at the end of the lower enclosure frame near the front frame. The lower enclosure frame is connected to the foot pedal, and the bottom surface of the joint between the foot pedal and the lower enclosure frame is provided with a foot pedal. Limiting block, the footholding block has a bayonet that matches the shape of the end of the pedal, and when there is an upper baffle on the bayonet, the upper baffle and the inclined surface on the protruding part of the top of the pedal When the upper limit of the footrest movement is coordinated to cooperate, the lower periphery frame is provided with a lower periphery frame joint 15 for limiting the folding angle of the pedal when there is no upper flap. The lower stop of the bayonet cooperates with the back of the pedal to limit the movement. This can prevent the pedal from rattling when it is lowered, and it is convenient for users to sit when turning up. The lower end of the foot pedal is connected to the connecting end through the rotary connecting member, and the rotary connecting member may include bolts, screws, and the like that allow the foot pedal to be rotatably connected to the supporting rod. The pedal limit lever is arranged on the pedal lever, and the pedal connecting end is provided with a circular arc-shaped (a quarter circle size) said pedal limit groove, and the pedal limit lever is on the pedal Slide in the limit slot to adjust the flip angle of the foot pedal. When the foot lever reaches the limit position, the foot pedal is driven to lower, and due to the effect of its own gravity, the foot pedal automatically returns to the horizontal state. At this time, the pedal limit lever is stuck on the upper port of the pedal limit slot. When the pedal lever moves the pedal upwards, the pedal will flip under its own gravity. When the foot limit lever is locked in the lower port of the foot limit slot, the foot pedal is fixed and stopped from turning over. To prevent uncontrolled turning and shaking of the foot pedal. Among them, when the maximum turning angle of the foot pedal formed by the combination of the limit lever and the limit groove is 90 °, the use effect is the best.

The folding electric wheelchair of the present invention has the beneficial effects of using a folding rail piece, a folding fixing piece and a folding locking component to lock and unlock the folded state of the wheelchair, and using a jack to improve the stability and firmness of the lock. The rail piece improves the load-bearing capacity of the whole vehicle, timely corrects and restricts the movement direction and position of the folding lock assembly, and is convenient, fast and stable to use.

The above description is only an embodiment of the present invention, and thus does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the content of the description of the present invention, or directly or indirectly used in other related technical fields, are The same is included in the patent protection scope of the present invention.

Claims (10)

A folding electric wheelchair, which is characterized by comprising: a front frame, a rear frame, a seat, a seat joint, a folding lock assembly, a folding fixing piece, a lower frame, and carrying, guiding and limiting the folding lock assembly. Folding rail piece, The bottom of the front frame is movably connected to the front wheel, the top of the front frame is connected to the seat through the seat joint, and the rear end of the seat is connected to the rear frame. The bottom of the rear frame is movably disposed on the driving rear wheels, and the lower enclosure frame is connected to the front frame and the rear frame, respectively, and is close to the lower enclosure frame of the rear frame. The end is provided with the folding fixing piece, the top of the folding fixing frame is provided with a folding hole and an unfolding hole, the unfolding hole is provided with the folding guide piece, and the folding locking assembly is provided at two through connecting rods. Between the rear frames, two ends of the folding lock assembly are movably connected to the folding hole or the unfolding hole, so that the wheelchair can be locked and unlocked by folding. The folding electric wheelchair according to claim 1, wherein the folding locking component is movably connected to the folding hole or the unfolding hole through extension and indentation at both ends, so that the wheelchair can be locked and unlocked by folding. The folding electric wheelchair according to claim 1 or 2, characterized in that, when folding is locked, both ends of the folding locking assembly protrude through the folding rail piece and are connected to the deployment hole, or The two ends of the fold lock component are extended to connect with the fold hole; when the fold is unlocked, the two ends of the fold lock component are retracted away from the fold hole or the unfolded hole. The folding electric wheelchair according to any one of claims 1 to 3, wherein the folding rail piece has a U-shaped structure. The folding electric wheelchair according to any one of claims 1 to 4, wherein a backrest is provided on the top of the rear frame, and a steplessly adjustable backrest is provided between the backrest and the rear frame. Angle adjustment device. The folding electric wheelchair according to any one of claims 1 to 5, wherein both sides of the seat are provided with an armrest frame that can move up and down and an armrest located on the armrest frame. The armrest moves back and forth on the armrest frame. The folding electric wheelchair according to claim 5 or 6, wherein a height-adjustable headrest is provided on the top of the backrest. The folding electric wheelchair according to any one of claims 1 to 7, characterized in that an end portion of the lower frame near the front frame is provided with a footrest, and the footrest and the The lower enclosure frame is a foldable connection, and the lower enclosure frame is provided with a joint of the lower enclosure frame for limiting the folding angle of the pedals. The folding electric wheelchair according to any one of claims 1 to 8, wherein a cushion support block is movably provided between the lower enclosure frame and the seat. The folding electric wheelchair according to any one of claims 1 to 9, wherein the folding locking component comprises a hollow tube, a folding link, a connecting block, a spring, a connecting sleeve, a movable hole, a connecting bolt, and an unlocking A pin, the hollow tube is fixedly connected to the rear frame through the connecting rod, the connecting sleeve is disposed at both ends of the hollow tube, and one end of the folding link is disposed in the hollow tube and connected with The connecting block is connected, the other end of the folding link is connected to the unlocking pin through the connecting sleeve, the spring is provided between the two connecting blocks, and the movable hole is provided at On the hollow tube, one end of the connection bolt is connected to the connection block through the movable hole, and a folding knob is provided on the other end.

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