CN217510729U

CN217510729U - Foldable wheelchair

Info

Publication number: CN217510729U
Application number: CN202221412849.6U
Authority: CN
Inventors: 陈向阳; 唐良振; 李向华
Original assignee: Zhejiang Aceme Electric Co ltd
Current assignee: Zhejiang Aceme Electric Co ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-09-30
Anticipated expiration: 2032-06-07

Abstract

The utility model provides a foldable wheelchair, which comprises a foldable wheelchair frame and wheel components, wherein the wheelchair frame comprises a chassis, a seat rod, a backrest rod rotationally connected with the seat rod through a first rotating shaft, a bottom stay rod positioned below the seat rod, a rear upright rod and a rear connecting rod, the upper end part of the bottom stay rod is rotationally connected with the backrest rod through a second rotating shaft, the lower end part of the bottom stay rod is rotationally connected with the front end part or the middle part of the chassis, the upper end part of the rear upright rod is rotationally connected with the front end part of the seat rod, the lower end part of the rear upright rod is rotationally connected with the rear end part of the chassis through a third rotating shaft, the upper end part of the rear connecting rod is rotationally connected with the backrest rod through a fourth rotating shaft positioned between the first rotating shaft and the second rotating shaft, the lower end part of the rear upright rod is rotationally connected with the lower end part of the rear upright rod through a fifth rotating shaft positioned above the third rotating shaft, when the backrest rod turns forwards to approach the seat rod, the seat rod can be driven to the chassis, the operation is convenient and the safety is good, can vacate the space behind patient's shank, conveniently set up supplementary medical instrument, do not influence the patient about, convenient to use.

Description

Foldable wheelchair

Technical Field

The utility model belongs to the field of medical equipment, concretely relates to collapsible wheelchair.

Background

The foldable wheelchair is a medical apparatus capable of saving occupied space, is used for assisting patient treatment and rehabilitation, generally comprises a seat, a backrest, a wheel assembly and the like for driving the wheelchair to move, the folding action of the foldable wheelchair mainly comprises the folding action of the seat and the backrest and the reduction action of the height of the seat, the common foldable wheelchair is not linked in the two actions, the two actions are required to be carried out independently, the operation is inconvenient, and the foldable wheelchair capable of realizing linkage is also provided, but most wheelchairs of the type realize linkage through the relative rotation of a front wheel bracket and a rear wheel bracket, the front wheel and the rear wheel can be close to each other during folding, the feet and other parts of an operator are easily crushed and bruised, the safety is poor, in addition, when a patient takes the wheelchair, the front wheel bracket and the rear wheel bracket can occupy too much space behind the crus of the patient, and the auxiliary medical apparatus matched with the patient treatment and the rehabilitation can only be placed in front of the patient, so that the patient is very inconvenient to get on or off the wheelchair.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a foldable wheelchair with convenient operation, good safety and convenient use.

In order to achieve the above object, the utility model adopts the technical scheme that the foldable wheelchair comprises a foldable wheelchair frame and a wheel component connected to the bottom of the wheelchair frame, the wheelchair frame comprises a chassis, a seat rod positioned above the chassis, and a back rod rotatably connected with the rear end of the seat rod through a first rotating shaft, the wheelchair frame further comprises a bottom stay rod, a rear vertical rod and a rear connecting rod, the bottom stay rod is positioned below the seat rod, the upper end of the bottom stay rod is rotatably connected with the back rod through a second rotating shaft, the lower end of the bottom stay rod is rotatably connected with the front end or the middle part of the chassis, the upper end of the rear vertical rod is rotatably connected with the front end of the seat rod, the lower end of the rear vertical rod is rotatably connected with the rear end of the chassis through a third rotating shaft, the upper end of the rear connecting rod is rotatably connected with the back rod through a fourth rotating shaft, the lower tip of back connecting rod pass through the fifth pivot with the lower tip of back pole setting rotates to be connected, the fourth pivot is located first pivot with between the second pivot, the fifth pivot is located the top of third pivot the back pole overturn forward with when the seat pole was drawn close, can pass through the back pole the back connecting rod the back pole setting the four-bar linkage that the seat pole constitutes and the back pole the end support pole the chassis the back pole setting the five-bar linkage that the seat pole constitutes drive the seat pole to the chassis is drawn close, realizes folding of wheelchair frame.

Preferably, the seat rod includes a seat body extending in a front-rear direction and a seat extension rod connected to a rear end portion of the seat body and extending obliquely rearward and upward, and the first pivot shaft is located at an upper end portion of the seat extension rod.

Further preferably, the seat extension bar has two and is located on both sides of the back bar.

Further preferably, the seat body has a square shape in a projection in the up-down direction.

Preferably, the upper end of the backrest rod is bent into a square backrest body, and the lower end of the backrest rod is connected to the middle of the bottom of the backrest body and extends downwards.

Further preferably, the two rear connecting rods are arranged corresponding to the two rear vertical rods on the two sides of the chassis and the seat rod, the upper ends of the two rear connecting rods are rotatably connected with the backrest rod through the fourth rotating shaft, and an inverted V-shaped support is formed below the backrest rod.

Further preferably, the wheelchair frame further includes a grab bar, and rear ends of the grab bar are rotatably connected to both sides of the backrest body.

Preferably, the chassis comprises a square frame and a stabilizer bar connected to the middle of the frame, and the lower end of the bottom stay bar is rotatably connected to the stabilizer bar.

Further preferably, the four corners of the frame are connected with mounting rods extending vertically downwards, and the center of the wheel assembly is rotatably connected with the lower ends of the mounting rods.

Further preferably, the foldable wheelchair further comprises a locking mechanism for locking the wheelchair frame in the unfolded state.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

1. when the backrest rod turns forwards and the seat rod is closed, the seat rod can be driven to close towards the chassis by the four-bar mechanism consisting of the backrest rod, the rear connecting rod, the rear upright rod and the seat rod and the five-bar mechanism consisting of the backrest rod, the bottom supporting rod, the chassis, the rear upright rod and the seat rod, so that the closing action of the seat and the backrest and the reduction action of the height of the seat are linked, the folding of the wheelchair frame is realized, and the operation is convenient.

2. Due to the existence of the chassis, the front wheels and the rear wheels cannot be drawn together in the folding process, the phenomenon that the feet of an operator are crushed and injured by squeezing does not exist, and the safety is good.

3. The rear-mounted design of the rear connecting rod makes up space behind the crus of the patient, so that auxiliary medical equipment can be conveniently arranged, the interference on the movement of the patient to get on and off the wheelchair can be avoided, and the use is convenient.

Drawings

Fig. 1 is a perspective view of a preferred embodiment of the present invention.

Fig. 2, 3 and 4 are schematic left side views of fig. 1, wherein fig. 2 is in an unfolded state, fig. 4 is in a folded state, and fig. 3 is in an intermediate state during the unfolding and folding transformation.

Wherein: 10. a wheelchair frame; 11. a chassis; 111. a frame; 112. a stabilizer bar; 113. mounting a rod; 12. a seat post; 121. a seat body; 122. a seat extension bar; 13. a back rest rod; 131. a backrest body; 14. a bottom brace rod; 15. a rear upright rod; 16. a rear connecting rod; 17. a grab rail; 20. a wheel assembly; 31. a first rotating shaft; 32. a second rotating shaft; 33. a third rotating shaft; 34. a fourth rotating shaft; 35. a fifth rotating shaft; 41. a locking hole.

Detailed Description

The following description of the preferred embodiments of the present invention will be provided with reference to the accompanying drawings, so that the advantages and features of the present invention can be easily understood by those skilled in the art, and the scope of the present invention can be clearly and clearly defined.

The utility model describes the fore-and-aft direction, the left-and-right direction and the up-and-down direction are based on the fore-and-aft direction, the left-and-right direction and the up-and-down direction observed by the patient when taking the utility model provides a foldable wheelchair.

As shown in fig. 1 to 4, the foldable wheelchair provided by the present invention comprises a foldable wheelchair frame 10 and a wheel assembly 20 connected to the bottom of the wheelchair frame 10, the wheelchair frame 10 comprises a chassis 11, a seat rod 12 located under the chassis 11, a backrest rod 13 rotatably connected to the rear end of the seat rod 12 through a first rotating shaft 31, the wheelchair frame 10 further comprises a bottom stay 14, a rear upright rod 15 and a rear connecting rod 16, the bottom stay 14 is located under the seat rod 12, the upper end of the bottom stay 14 is rotatably connected to the backrest rod 13 through a second rotating shaft 32, the lower end of the bottom stay 14 is rotatably connected to the middle of the chassis 11, the upper end of the rear upright rod 15 is rotatably connected to the front end of the seat rod 12, the lower end of the rear upright rod 15 is rotatably connected to the rear end of the chassis 11 through a third rotating shaft 33, the upper end of the rear connecting rod 16 is rotatably connected to the backrest rod 13 through a fourth rotating shaft 34, the lower end of the rear connecting rod 16 is rotatably connected to the lower end of the rear upright rod 15 through a fifth rotating shaft 35, the fourth rotating shaft 34 is located between the first rotating shaft 31 and the second rotating shaft 32, the fifth rotating shaft 35 is located above the third rotating shaft 33, and when the backrest rod 13 is turned forwards and is closed to the seat rod 12, the seat rod 12 can be driven to close to the chassis by the four-bar linkage mechanism formed by the backrest rod 13, the rear connecting rod 16, the rear upright rod 15 and the seat rod 12 and the five-bar linkage mechanism formed by the backrest rod 13, the bottom stay 14, the chassis 11, the rear upright rod 15 and the seat rod 12, so that the wheelchair frame 10 can be folded.

The advantages of such an arrangement are:

1. the folding action of the seat and the backrest and the reduction action of the height of the seat can be linked, the folding of the wheelchair frame is realized, and the operation is convenient.

In fact, the backrest rod 13, the rear connecting rod 16, the rear vertical rod 15, the chassis 11 and the bottom supporting rod 14 form another five-bar mechanism, and the five-bar mechanism and the four-bar mechanism and the five-bar mechanism act together to realize the linkage of the seat backrest folding action and the seat height reducing action during the unfolding and folding process of the wheelchair frame 10.

In order to facilitate installation and improve riding comfort, in the present embodiment, the seat bar 12 includes a seat body 121 extending in the front-rear direction and a seat extension bar 122 connected to the rear end portion of the seat body 121 and extending obliquely rearward and upward, the first rotating shaft 31 is located at the upper end portion of the seat extension bar 122, specifically, the projection of the seat body 121 in the up-down direction is square, and the seat extension bar 122 is two and located on both sides of the back bar 13 to improve stability.

In order to simplify the design and improve the novelty of the wheelchair frame structure, in this embodiment, the upper end of the back lever 13 is bent into a square-shaped back body 131, and the lower end of the back lever 13 is connected to the middle of the bottom of the back body 131 and extends downward.

In this embodiment, the two rear connecting rods 16 are disposed corresponding to the two rear vertical rods 15 on both sides of the chassis 11 and the seat rod 12, the upper ends of the two rear connecting rods 16 are rotatably connected to the backrest rod 13 through the fourth rotating shaft 34, and an inverted V-shaped support is formed below the backrest rod 13 to enhance stability.

In order to improve the riding comfort, in this embodiment, the wheelchair frame 10 further includes a grab bar 17, rear end portions of the grab bar 17 are rotatably connected to both sides of the backrest body 131, the chassis 11 includes a frame 111 having a square shape and a stabilizer bar 112 connected to a middle portion of the frame 111, a lower end portion of the bottom stay 14 is rotatably connected to a middle portion of the stabilizer bar 112, mounting bars 113 extending vertically downward are connected to four corners of the frame 111, and a center of the wheel assembly 20 is rotatably connected to a lower end portion of the mounting bars 113.

The foldable wheelchair further includes a locking mechanism for locking the wheelchair frame 10 in the unfolded state, the locking mechanism including a locking hole 41 and a locking pin (not shown), the locking hole 41 being opened in the rear link 16 and located between the fourth rotating shaft 34 and the fifth rotating shaft 35, the locking pin being inserted into the locking hole 41 and abutting against the front side of the back lever 13 when the locking mechanism is locked, so that the back lever 13 cannot be turned backward, and the back lever 13 cannot be turned forward when a patient sits thereon, thereby achieving locking.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a collapsible wheelchair, includes folding wheelchair frame and connects the wheel subassembly of wheelchair frame bottom, the wheelchair frame includes the chassis, is located the seat pole of chassis top, with the back pole of connecting is rotated through first pivot to the rear end of seat pole, its characterized in that: the wheelchair frame further comprises a bottom supporting rod, a rear upright rod and a rear connecting rod, wherein the bottom supporting rod is positioned below the seat rod, the upper end part of the bottom supporting rod is rotatably connected with the back support rod through a second rotating shaft, the lower end part of the bottom supporting rod is rotatably connected with the front end part or the middle part of the chassis, the upper end part of the rear upright rod is rotatably connected with the front end part of the seat rod, the lower end part of the rear upright rod is rotatably connected with the rear end part of the chassis through a third rotating shaft, the upper end part of the rear connecting rod is rotatably connected with the back support rod through a fourth rotating shaft, the lower end part of the rear connecting rod is rotatably connected with the lower end part of the rear upright rod through a fifth rotating shaft, the fourth rotating shaft is positioned between the first rotating shaft and the second rotating shaft, the fifth rotating shaft is positioned above the third rotating shaft, and when the back support rod is forwards turned and closed with the seat rod, the folding of the wheelchair frame can be realized by driving the seat rods to approach the chassis through the four-bar mechanism consisting of the back rods, the back connecting rods, the back upright rods and the seat rods and the five-bar mechanism consisting of the back rods, the bottom supporting rods, the chassis, the back upright rods and the seat rods.

2. The foldable wheelchair of claim 1, wherein: the seat rod comprises a seat body extending along the front-back direction and a seat extension rod connected to the rear end of the seat body and extending obliquely towards the rear upper part, and the first rotating shaft is positioned at the upper end part of the seat extension rod.

3. The foldable wheelchair as recited in claim 2, wherein: the seat extension rods are two and are positioned on two sides of the backrest rod.

4. The foldable wheelchair of claim 2, wherein: the projection of the seat body in the vertical direction is in a square shape.

5. The foldable wheelchair as recited in claim 1, wherein: the upper end part of the backrest rod is bent into a square backrest body, and the lower end part of the backrest rod is connected to the middle position of the bottom of the backrest body and extends downwards.

6. The foldable wheelchair as recited in claim 5, wherein: the two rear connecting rods are arranged corresponding to the two rear upright rods positioned on the two sides of the chassis and the seat rod, the upper end parts of the two rear connecting rods are rotatably connected with the backrest rod through the fourth rotating shaft, and an inverted V-shaped support is formed below the backrest rod.

7. The foldable wheelchair of claim 5, wherein: the wheelchair frame further comprises a grab rail, and the rear end of the grab rail is rotatably connected to two sides of the backrest body.

8. The foldable wheelchair as recited in claim 1, wherein: the chassis comprises a square frame and a transverse stabilizer bar connected to the middle of the frame, and the lower end part of the bottom stay bar is rotatably connected with the transverse stabilizer bar.

9. The foldable wheelchair as recited in claim 8, wherein: and the four corners of the frame are connected with mounting rods which vertically extend downwards, and the centers of the wheel assemblies are rotatably connected to the lower end parts of the mounting rods.

10. The foldable wheelchair as recited in any one of claims 1-9, wherein: the foldable wheelchair further includes a locking mechanism for locking the wheelchair frame in an unfolded state.