CN217611770U - A wheelchair with bed and chair transfer function - Google Patents

Abstract

The utility model discloses a wheelchair with bed chair shifts function, including the four-wheel dolly, establish elevating system on the four-wheel dolly, establish on elevating system can open up flat formula wheelchair frame, slide and establish the human support piece on can opening up flat formula wheelchair frame, be equipped with conveyer belt mechanism on the human support piece. The flattening wheelchair frame can be folded or flattened to enable a wheelchair user to switch between a sitting posture and a lying posture, the human body supporting piece is used for sliding out from the side of the flattening wheelchair frame to be suspended above the bed surface when the flattening wheelchair frame is unfolded, and the conveying belt mechanism is used for realizing the transfer of the wheelchair user between the human body supporting piece and the bed surface. The conveying belt mechanism comprises a conveying belt, a driving roller, a tensioning roller and a conveying motor, and the conveying direction of the conveying belt is parallel to the sliding direction of the human body supporting piece relative to the flattening type wheelchair frame. Use the utility model discloses can solve among the prior art wheelchair user and realize the technical problem that need pay out great strength when the bed chair shifts.

Description

A wheelchair with bed and chair transfer function

technical field

The utility model relates to the technical field of wheelchairs, in particular to a wheelchair with a bed-chair transfer function.

Background technique

In the face of special groups such as the elderly and the disabled, they are accompanied by their daily care, independent living, and getting out of bed. Wheelchairs are very important tools for such special groups.

Wheelchairs can help them achieve barrier-free activities. For the elderly or disabled people with limited mobility, it is very difficult to realize bed and chair transfer, which brings great difficulties to the caregivers and causes the safety of the elderly or disabled people. certain hidden dangers.

For example, as the first-generation product disclosed in the patent CN215020771U, the four-wheeled trolley is provided with a flattenable wheelchair frame through a lifting mechanism, and the flattenable wheelchair frame can be retracted or flattened, so that the wheelchair user can be in the sitting position and lying position. Switching from one to another, the expandable wheelchair support is provided with a human body support for carrying the wheelchair user and capable of sliding out from the side of the expandable wheelchair support.

When the wheelchair user needs to be transferred from the wheelchair to the bed, operate the extendable wheelchair support to flatten the wheelchair user in a lying position, adjust the height through the lifting mechanism and remove the human support from the side of the extendable wheelchair frame Slide out to meet the bed surface and move the wheelchair user from the body support to the bed surface. When the wheelchair user needs to be transferred from the bed surface to the wheelchair, operate the flattenable wheelchair bracket to flatten, adjust the height through the lifting mechanism and slide the body support from the side of the flattenable wheelchair frame to meet the bed surface , move the wheelchair user from the bed surface to the human body support, operate the human body support to move back to the flattenable wheelchair frame, and then retract the flattenable wheelchair frame so that the wheelchair user is in a sitting position.

Although this solution greatly reduces the difficulty of the wheelchair user to transfer the bed and chair, when the wheelchair user moves between the human body support and the bed surface, it still requires the wheelchair user or the caregiver to spend a lot of effort. Users who are inconvenient to move during the rehabilitation period still have great difficulty in use.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a wheelchair with a bed and chair transfer function, which can solve the technical problem in the prior art that a wheelchair user needs to put in great effort to realize the bed and chair transfer.

In order to achieve the above purpose, the present invention adopts the following technical solutions.

A wheelchair with bed and chair transfer function, comprising a four-wheeled trolley, a lifting mechanism arranged on the four-wheeled trolley, a flattenable wheelchair frame arranged on the lifting mechanism, and a sliding wheelchair provided on the flattenable wheelchair frame for A human body support for a wheelchair user to sit on, a conveyor belt mechanism for realizing the transfer function of the bed and chair is arranged on the human body support.

The extendable wheelchair frame can be stowed or flattened to allow the wheelchair user to switch between sitting and lying positions, and the human support is used to slide from the sides of the extendable wheelchair frame when the extendable wheelchair frame is flattened Hanging above the bed surface, the conveyor belt mechanism is used to realize the transfer of the wheelchair user between the body support and the bed surface.

Further, the conveyor belt mechanism includes a conveyor belt, a driving roller for driving the cyclic rotation of the conveyor belt, a tensioning roller for tensioning the conveyor belt, and a conveying motor for driving the rotation of the driving roller. The pieces are parallel to the sliding direction of the extendable wheelchair frame.

Further, the flattenable wheelchair frame includes two sets of side support rods with the same structure and symmetrically arranged, and a plurality of transverse links are connected between the two sets of side support rods.

The side support rod set includes a back frame side support rod, a bottom frame side support rod, a handrail side support rod and a leg frame side support rod, the bottom frame side support rod is installed horizontally on the top side of the lifting mechanism, and the bottom frame side support rod One end of the support rod is hinged with one end of the back frame side support rod, the other end of the bottom frame side support rod is hinged with the middle part of the leg frame side support rod, one end of the armrest side support rod is hinged with the middle part of the back frame side support rod, and the armrest The other end of the side support rod is hinged with the end of the leg frame side support rod close to the back frame side support rod, the armrest side support rod and the bottom frame side support rod are parallel to each other, so that the back frame side support rod, the bottom frame side support rod, the armrest The side support rods and the leg frame side support rods can cooperate to form a parallelogram mechanism.

There is an electric push rod between the back frame side support rod and the bottom frame side support rod to realize the retractable or flattening of the flattenable wheelchair frame. One end of the electric push rod is connected with a transverse link located in the middle of the back frame side support rod The other end of the electric push rod is hinged with the electric push rod bracket arranged on the transverse link on the side of the bottom frame side support rod close to the back frame side support rod.

The telescopic electric push rod can drive the back frame side support rod to rotate around the bottom frame side support rod, and the back frame side support rod drives the leg frame side support rod to rotate around the bottom frame side support rod through the armrest side support rod to realize a flattenable wheelchair The retraction or flattening of the frame.

Further, the human body support includes a head slide, a base slide and a leg slide, a head slide is provided between the two back frame side support bars, a base slide is provided between the two bottom frame side support bars, and the two A leg slide rail is arranged between the side support rods of the leg frame, and the head slide rail, the base slide rail and the leg slide rail are all arranged in parallel and perpendicular to the length direction of the side support rod group.

The head slide is matched with the head slide and can slide along the length direction of the head slide, the base slide is matched with the base slide and can slide along the length of the base slide, the leg slide is connected with the leg slide Fits and can slide along the length of the leg rails.

Further, the head slide, the base slide and the leg slide are each provided with a set of conveyor belt mechanisms, one side of the head slide, the base slide and the leg slide is provided with a driving roller, the other side is provided with a tension roller, and the driving roller It is parallel to the tension roller and perpendicular to the sliding direction of the human body support relative to the flattenable wheelchair frame. The conveyor belt is surrounded by the driving roller and the tension roller. The three conveying motors are respectively connected to the head slide, base slide and legs. The outer slide is fixedly connected.

Further, the tension rollers are arranged on the side where the head slide, base slide and leg slides slide out relative to the flattenable wheelchair frame, the driving rollers are arranged on the other side opposite to the tension rollers, the head slide, Both the base slide and the leg slide are provided with support rollers on the side in contact with the wheelchair user for reducing the running resistance of the conveyor belt.

Further, the head sliding plate, the base sliding plate and the leg sliding plate are provided with a slope structure on the side where the tension roller is provided for facilitating the transfer of the wheelchair user between the body support and the bed surface.

Further, the human body support also includes three drive motors for respectively driving the head slide, the base slide and the leg slide relative to the head slide, the base slide and the leg slide, and the three drive motors run synchronously. , which drives the head slide, base slide and leg slide to slide synchronously relative to the flattenable wheelchair frame.

Further, the four-wheeled trolley includes a vehicle body frame, two fixed wheels arranged at the rear of the vehicle body frame, and two universal wheels arranged in front of the vehicle body frame. The vehicle body frame is also provided with a traveling motor for driving the fixed wheels. .

The lifting mechanism includes two sets of telescopic rod groups for vertically moving the flattenable wheelchair frame up and down relative to the vehicle body frame, and a driving electric cylinder for driving the flattenable wheelchair frame to move up and down relative to the vehicle body frame.

Two sets of telescopic rod groups are symmetrically arranged in the front and rear directions between the four-wheeled trolley and the frame of the flattenable wheelchair. Each group of telescopic rod groups includes two cross-distributed telescopic rods. The two sides of the vehicle body frame are rotatably connected, and the upper ends of the two telescopic rods in the same group are respectively rotatably connected with the bottom frame side support rods on the opposite side.

Further, the frame of the vehicle body is also provided with a support mechanism that can be supported on the ground when the transfer function of the bed and chair is realized, so as to increase the stability.

After adopting the above-mentioned technical scheme, the utility model has the following beneficial effects:

1. On the basis of the prior art, the present invention adds a conveyor belt mechanism on the head slide plate, base slide plate and leg slide plate of the human body support, and links the conveyor belt with the human body support part to reduce the time required to realize the bed and chair. The amount of movement of the wheelchair user during transfer, reducing the workload of the wheelchair user or caregiver;

2. Since the movement of the wheelchair user is greatly reduced when the bed and chair are transferred, the probability of the wheelchair user causing injury during the transfer of the bed and chair is reduced;

3. Increase the support mechanism. When the bed and chair transfer function is realized, the support mechanism can be supported on the ground to increase the overall stability of the wheelchair.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of the sitting posture state of the present invention.

FIG. 2 is a schematic three-dimensional structure diagram of another angle of the sitting posture state of the present invention.

FIG. 3 is a schematic cross-sectional structure diagram of the conveyor belt mechanism.

FIG. 4 is a schematic three-dimensional structure diagram of the present invention in a lying posture state.

FIG. 5 is a schematic three-dimensional structural diagram of the human body support in the lying position state of the present invention sliding out.

FIG. 6 is a state schematic diagram of the utility model realizing the transfer function of the bed and chair.

Description of drawings: 1. Four-wheeled trolley, 11. Body frame, 12. Fixed wheel, 13. Universal wheel, 14. Supporting mechanism, 2. Lifting mechanism, 21. Driving electric cylinder, 22. Telescopic rod, 3. Flattenable wheelchair frame, 31, back frame side support rod, 32, bottom frame side support rod, 33, armrest side support rod, 34, leg frame side support rod, 35, transverse link, 36, electric push rod , 37, electric push rod bracket, 4, human body support, 41, head slide, 42, base slide, 43, leg slide, 5, conveyor belt mechanism, 51, conveyor belt, 52, driving roller, 53, Zhang Tight rollers, 54, support rollers, 6 bed surfaces.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the features and performance of a wheelchair with bed and chair transfer function in the present utility model are further described in detail below with reference to the accompanying drawings and embodiments.

A wheelchair with a bed and chair transfer function, comprising a four-wheeled trolley 1, a lifting mechanism 2 arranged on the four-wheeled trolley 1, a flattenable wheelchair frame 3 that can be lifted and lowered on the four-wheeled trolley 1 through the lifting mechanism 2, The human body support 4 is slidably arranged on the flattenable wheelchair frame 3 for seating the wheelchair user, and the human body support 4 is also provided with a conveyor belt mechanism 5 for realizing the transfer function of the bed and chair.

The flattenable wheelchair frame 3 can be retracted or flattened to allow the wheelchair user to switch between sitting and lying positions. The flattenable wheelchair frame 3 includes two sets of side support rods with the same structure and symmetrically arranged, and a plurality of transverse links 35 are connected between the two sets of side support rods.

The side support rod set includes a back frame side support rod 31 , a bottom frame side support rod 32 , an armrest side support rod 33 and a leg frame side support rod 34 . The bottom frame side support rod 32 is horizontally installed on the top side of the lifting mechanism 2, one end of the bottom frame side support rod 32 is hinged with one end of the back frame side support rod 31, and the other end of the bottom frame side support rod 32 is supported with the leg frame side The middle part of the rod 34 is hinged, one end of the armrest side support rod 33 is hinged with the middle part of the back frame side support rod 31, and the other end of the armrest side support rod 33 is hinged with one end of the leg frame side support rod 34 close to the back frame side support rod 31 , the armrest side support rod 33 and the bottom frame side support rod 32 are parallel to each other, so that the back frame side support rod 31, the bottom frame side support rod 32, the armrest side support rod 33 and the leg frame side support rod 34 can cooperate to form a parallelogram mechanism .

Further, an electric push rod 36 for retracting or flattening the retractable wheelchair frame 3 is provided between the back frame side support rod 31 and the bottom frame side support rod 32 . One end of the electric push rod 36 is hinged with the transverse link 35 located in the middle of the back frame side support rod 31, and the other end of the electric push rod 36 is connected with the transverse link provided on the bottom frame side support rod 32 near the back frame side support rod 31. The electric push rod bracket 37 on the rod 35 is hinged.

The telescopic electric push rod 36 can drive the back frame side support rod 31 to rotate around the bottom frame side support rod 32 , and the back frame side support rod 31 drives the leg frame side support rod 34 through the armrest side support rod 33 to rotate around the bottom frame side support rod 32 Rotate to realize the retractable or flattening of the expandable wheelchair frame 3 .

The human body support 4 is used to slide out from the side of the flattenable wheelchair frame 3 and hang above the bed surface 6 when the flattenable wheelchair frame 3 is flattened. The human body support 4 includes a head slide 41 , a base slide 42 and a leg slide 43 . A head slide rail is provided between the two back frame side support rods 31 , a base slide rail is provided between the two bottom frame side support rods 32 , and a leg slide rail is provided between the two leg frame side support rods 34 , the head slide rail, the base slide rail and the leg slide rail are all arranged in parallel and perpendicular to the length direction of the side support rod group.

The head slide 41 is matched with the head slide and can slide along the length of the head slide, the base slide 42 is matched with the base slide and can slide along the length of the base slide, and the leg slide 43 is connected to the leg slide 43. The slide rails are matched and can slide along the length of the leg rails.

Further, the human body support 4 also includes three drive motors for respectively driving the head slide 41, the base slide 42 and the leg slide 43 to slide relative to the head slide, the base slide and the leg slide. The driving motors run synchronously to drive the head slide 41 , the base slide 42 and the leg slide 43 to slide relative to the flattenable wheelchair frame 3 synchronously.

The conveyor belt mechanism 5 is used for transferring the wheelchair user between the body support 4 and the bed surface 6 .

The head slide 41 , the base slide 42 and the leg slide 43 are each provided with a set of conveyor belt mechanisms 5 . The conveyor belt mechanism 5 includes a conveyor belt 51 , a driving roller 52 for driving the conveyor belt 51 to rotate cyclically, a tensioning roller 53 for tensioning the conveyor belt 51 , and a conveying motor for driving the driving roller 52 to rotate. The conveying direction is parallel to the sliding direction of the human body support 4 relative to the flattenable wheelchair frame 3 .

Further, one side of the head slide 41, the base slide 42 and the leg slide 43 is provided with a driving roller 52, and the other side is provided with a tensioning roller 53, the driving roller 52 and the tensioning roller 53 are parallel to each other and are parallel to the human body support member. 4. It is perpendicular to the sliding direction of the flattenable wheelchair frame 3. The conveyor belt 51 is surrounded by the driving roller 52 and the tension roller 53. connect.

Further, the tension roller 53 is provided on the side of the head slide 41 , the base slide 42 and the leg slide 43 which slide out relative to the flattenable wheelchair frame 3 , and the driving roller 52 is provided on the other side opposite to the tension roller 53 . On one side, the head slide 41 , the base slide 42 and the leg slide 43 are provided with support rollers 54 for reducing the running resistance of the conveyor belt 51 on the side in contact with the wheelchair user.

Further, the head slide 41 , the base slide 42 and the leg slide 43 are provided with a ramp structure on the side where the tension roller 53 is provided to facilitate the wheelchair user to transfer between the body support 4 and the bed surface 6 .

The four-wheeled trolley 1 includes a vehicle body frame 11 , two fixed wheels 12 arranged behind the vehicle body frame 11 and two universal wheels 13 arranged in front of the vehicle body frame 11 . The travel motor of the wheel 12 .

The lifting mechanism 2 includes two sets of telescopic rod groups for making the flattenable wheelchair frame 3 move vertically up and down relative to the vehicle body frame 11 , and two sets of telescopic rods for driving the flattenable wheelchair frame 3 to move up and down relative to the vehicle body frame 11 . The electric cylinder 21 is driven.

Two sets of telescopic rod sets are symmetrically arranged in the front and rear directions between the four-wheeled trolley 1 and the flattenable wheelchair frame 3, each set of telescopic rod sets includes two cross-distributed telescopic rods 22, and two telescopic rods 22 in the same group The lower ends of the telescopic rods 22 are respectively rotatably connected to both sides of the vehicle body frame 11, and the upper ends of the two telescopic rods 22 in the same group are respectively rotatably connected to the bottom frame side support rods 32 on the opposite side.

Further, the vehicle body frame 11 is also provided with a support mechanism 14 that can be supported on the ground when the bed and chair transfer function is realized, so as to increase the stability. The support mechanism 14 should be set in the direction that the wheelchair may roll when the wheelchair is in use, usually at the rear and side. In this embodiment, the support mechanism 14 is set at the rear of the vehicle body frame 11. In actual use, it can be installed in the vehicle as needed. A set of support mechanisms 14 are added to the side of the body frame 11 .

The wheelchair with bed and chair transfer function is also provided with a battery and a control system for providing power. The control system is provided with a control handle. Through the control panel, the support mechanism 14, the driving electric cylinder 21, the walking motor, the electric push rod 36, and the driving motor can be adjusted. and the conveying motor are controlled.

For specific implementation, please refer to Figures 1 to 6. First, the operation method of transferring the wheelchair user from the wheelchair to the bed surface 6 will be described. The initial state is that the wheelchair user is sitting on the wheelchair in a sitting posture.

The entire wheelchair is moved to the side of the bed surface 6 by the cart 1, and the support mechanism 14 is operated to fix and support the cart 1 on the ground.

The electric push rod 36 is operated to shorten, and driven by the electric push rod 36, the flattenable wheelchair frame 3 is flattened, so that the wheelchair user is in a lying position. The human body support 4 directly supports the body of the wheelchair user, wherein the head slide 41 supports the upper torso and the head, the base slide 42 supports the buttocks, and the leg slide 43 supports the legs.

Operate the electric cylinder 21 to adjust the height of the flattenable wheelchair frame 3 so that the height of the human body support 4 is slightly higher than the height of the bed surface 6 .

Operate the three drive motors to run synchronously, and drive the head slide 41 , the base slide 42 and the leg slide 43 to slide out from the side of the flattenable wheelchair frame 3 to the top of the bed 6 , so that the wheelchair user is suspended above the bed 6 .

The three driving motors and the three conveying motors are operated synchronously, so that the head sliding plate 41, the base sliding plate 42 and the leg sliding plate 43 are synchronously retracted in the direction of the flattenable wheelchair frame 3. At the same time, the head sliding plate 41, the base sliding plate 42 and the The conveyor belt mechanism 5 on the leg slide 43 synchronously transports the wheelchair user to the direction of the bed surface 6 to keep the user and the bed surface 6 relatively stationary, the head slide 41, the base slide 42 and the leg slide 43 are fully retracted, and the wheelchair is fully retracted. The user then falls on the bed surface 6 smoothly. During the retracting process, due to the effect of the ramp structure, the wheelchair user falls from the body support 4 to the bed surface 6 too smoothly.

The step of transferring the wheelchair user to the bed surface 6 by the synchronous operation of the three driving motors and the three conveying motors can realize one-key operation in the preset program in the control system, which reduces the difficulty of operation and avoids injury caused by misoperation.

After the wheelchair user falls on the bed surface 6 , the support mechanism 14 is retracted, the wheelchair is removed, and the operation of transferring the wheelchair user from the wheelchair to the bed surface 6 is completed.

The operation method for transferring the wheelchair user from the bed surface 6 to the wheelchair will be described below. The initial state is that the wheelchair user is lying on the bed surface 6 .

The entire wheelchair is moved to the side of the bed surface 6 by the cart 1, and the support mechanism 14 is operated to fix and support the cart 1 on the ground.

The electric push rod 36 is operated to shorten, and driven by the electric push rod 36, the flattenable wheelchair frame 3 is flattened.

Operate the electric cylinder 21 to adjust the height of the flattenable wheelchair frame 3 so that the height of the human body support 4 is slightly higher than the height of the bed surface 6 .

Make the wheelchair user lie on the bed surface 6 near the edge, operate the three drive motors to run synchronously, and drive the head slide 41, the base slide 42 and the leg slide 43 to slide out a short section from the side of the flattenable wheelchair frame 3 The distance is such that the upper surface of one end of the head slide 41 , the base slide 42 and the leg slide 43 provided with the slope structure is in contact with the bottom surface of the wheelchair user's body side.

Synchronously operate the three driving motors and the three conveying motors, so that the head slide 41 , the base slide 42 and the leg slide 43 slide out synchronously in the direction of the flattenable wheelchair frame 3 to the bed surface 6 . , The conveyor belt mechanism 5 on the base slide 42 and the leg slide 43 synchronously transports the wheelchair user to the direction of the flattenable wheelchair frame 3 to keep the user and the bed surface 6 relatively stationary. The head slide 41, base slide 42 and When the leg slide 43 slides out completely, the conveying motor stops at the same time, and the wheelchair user falls on the human body support 4 smoothly, and the upper torso and head are supported by the head slide 41, the buttocks are supported by the base slide 42, and the legs are supported by the base slide 42. Supported by the leg slides 43, the wheelchair user lies on the flattened and flattenable wheelchair frame 3 in a lying position.

The electric push rod 36 is operated to extend, and driven by the electric push rod 36, the flattenable wheelchair frame 3 is retracted, so that the wheelchair user is in a sitting position.

After retracting the support mechanism 14, the wheelchair user can adjust the height through the control handle, operate the walking motor to move, and the operation of transferring the wheelchair user from the bed surface 6 to the wheelchair is completed.

It should be noted that the parts that are not described in detail in this scheme are the prior art, and the above-mentioned embodiments are only used to illustrate the present utility model, but the present utility model is not limited to the above-mentioned embodiments, and all are based on the technical essence of the present utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a wheelchair with bed chair shifts function, includes four-wheel dolly (1), establishes elevating system (2) on four-wheel dolly (1), establishes on elevating system (2) can open flat wheelchair frame (3), slides and establishes on can opening flat wheelchair frame (3) and be used for making human support piece (4) that the wheelchair user took, its characterized in that: a conveying belt mechanism (5) for realizing the bed-chair transfer function is arranged on the human body supporting part (4),

the foldable wheelchair frame (3) can be folded or unfolded to enable a wheelchair user to switch between a sitting posture and a lying posture, the human body supporting piece (4) is used for sliding out and suspending above the bed surface (6) from the side of the foldable wheelchair frame (3) when the foldable wheelchair frame (3) is unfolded, and the conveying belt mechanism (5) is used for enabling the wheelchair user to transfer between the human body supporting piece (4) and the bed surface (6).

2. The wheelchair with a bed-chair transfer function as claimed in claim 1, wherein: the conveying belt mechanism (5) comprises a conveying belt (51), a driving roller (52) used for driving the conveying belt (51) to rotate circularly, a tensioning roller (53) used for tensioning the conveying belt (51) and a conveying motor used for driving the driving roller (52) to rotate, and the conveying direction of the conveying belt (51) is parallel to the sliding direction of the human body support piece (4) relative to the flattening wheelchair frame (3).

3. The wheelchair with a bed-chair transfer function as claimed in claim 2, wherein: the flattening wheelchair frame (3) comprises two groups of symmetrically arranged side supporting rod groups with the same structure, a plurality of transverse connecting rods (35) are connected between the two groups of side supporting rod groups,

the side support rod group comprises a back frame side support rod (31), a bottom frame side support rod (32), a handrail side support rod (33) and a leg frame side support rod (34), the bottom frame side support rod (32) is horizontally arranged on the top side of the lifting mechanism (2), one end of the bottom frame side support rod (32) is hinged with one end of the back frame side support rod (31), the other end of the bottom frame side support rod (32) is hinged with the middle part of the leg frame side support rod (34), one end of the handrail side support rod (33) is hinged with the middle part of the back frame side support rod (31), the other end of the handrail side support rod (33) is hinged with one end of the leg frame side support rod (34) close to the back frame side support rod (31), the handrail side support rod (33) is parallel to the bottom frame side support rod (32), the handrail side support rod (33) and the leg frame side support rod (34) can be matched to form a parallel mechanism,

an electric push rod (36) used for realizing the folding or unfolding of the flat wheelchair frame (3) is arranged between the back frame side supporting rod (31) and the bottom frame side supporting rod (32), one end of the electric push rod (36) is hinged with a transverse connecting rod (35) positioned in the middle of the back frame side supporting rod (31), the other end of the electric push rod (36) is hinged with an electric push rod bracket (37) arranged on the transverse connecting rod (35) at one side of the bottom frame side supporting rod (32) close to the back frame side supporting rod (31),

electric putter (36) are flexible can drive back frame side vaulting pole (31) around bottom frame side vaulting pole (32) rotatory and back frame side vaulting pole (31) drive shank frame side vaulting pole (34) through handrail side vaulting pole (33) and rotate around bottom frame side vaulting pole (32), realize packing up or the exhibition flat of can flat-bed wheelchair frame (3).

4. The wheelchair with a bed-chair transfer function as claimed in claim 3, wherein: the human body supporting part (4) comprises a head sliding plate (41), a base sliding plate (42) and a leg sliding plate (43), a head sliding rail is arranged between two back frame side supporting rods (31), a base sliding rail is arranged between two bottom frame side supporting rods (32), a leg sliding rail is arranged between two leg frame side supporting rods (34), the head sliding rail, the base sliding rail and the leg sliding rail are all arranged in parallel and are vertical to the length direction of a side supporting rod group,

the head sliding plate (41) is matched with the head sliding rail and can slide along the length direction of the head sliding rail, the base sliding plate (42) is matched with the base sliding rail and can slide along the length direction of the base sliding rail, and the leg sliding plate (43) is matched with the leg sliding rail and can slide along the length direction of the leg sliding rail.

5. The wheelchair with a bed-chair transfer function as claimed in claim 4, wherein: head slide (41), base slide (42) and shank slide (43) are equipped with a set of conveyer belt mechanism (5) respectively, head slide (41), one side of base slide (42) and shank slide (43) is equipped with drive roll (52), the opposite side is equipped with tensioning roller (53), drive roll (52) and tensioning roller (53) are parallel to each other and perpendicular for the slip direction of flat wheelchair frame (3) with human support piece (4), conveyer belt (51) surround in drive roll (52) and tensioning roller (53) outside, three conveying motor respectively with head slide (41), base slide (42) and shank slide (43) fixed connection.

6. The wheelchair with a bed-chair transfer function as claimed in claim 5, wherein: tensioning rollers (53) are arranged on one side, opposite to the flattening wheelchair frame (3), of the head sliding plate (41), the base sliding plate (42) and the leg sliding plate (43), a driving roller (52) is arranged on the other side opposite to the tensioning rollers (53), and supporting rollers (54) used for reducing the running resistance of the conveying belt (51) are arranged on one surfaces, in contact with a wheelchair user, of the head sliding plate (41), the base sliding plate (42) and the leg sliding plate (43).

7. The wheelchair with a transfer function of a bed and a chair as claimed in claim 6, wherein: the head sliding plate (41), the base sliding plate (42) and the leg sliding plate (43) are provided with slope structures at one side provided with the tensioning rollers (53) for facilitating the transfer of a wheelchair user between the human body support (4) and the bed surface (6).

8. The wheelchair with a bed-chair transfer function as claimed in claim 7, wherein: the human body support part (4) further comprises three driving motors which are used for respectively driving the head sliding plate (41), the base sliding plate (42) and the leg sliding plate (43) to slide relative to the head sliding rail, the base sliding rail and the leg sliding rail, the three driving motors synchronously operate to drive the head sliding plate (41), the base sliding plate (42) and the leg sliding plate (43) to synchronously slide relative to the flattening wheelchair frame (3).

9. The wheelchair with a bed-chair transfer function as claimed in claim 8, wherein: the four-wheel trolley (1) comprises a trolley body frame (11), two fixed wheels (12) arranged at the rear part of the trolley body frame (11) and two universal wheels (13) arranged at the front part of the trolley body frame (11), wherein the trolley body frame (11) is also provided with a walking motor used for driving the fixed wheels (12),

the lifting mechanism (2) comprises two groups of telescopic rod groups used for enabling the flattening wheelchair frame (3) to vertically move up and down relative to the vehicle body frame (11) and a driving electric cylinder (21) used for driving the flattening wheelchair frame (3) to vertically move relative to the vehicle body frame (11),

two sets of telescopic link groups are symmetrically arranged between the four-wheel trolley (1) and the flattening type wheelchair frame (3) in the front-back direction, each telescopic link group comprises two telescopic links (22) which are distributed in a cross mode, the lower ends of the two telescopic links (22) in the same group are respectively connected with two sides of the vehicle body frame (11) in a rotating mode, and the upper ends of the two telescopic links (22) in the same group are respectively connected with the bottom frame side supporting rods (32) on the opposite side in a rotating mode.

10. The wheelchair with a bed-chair transfer function as claimed in claim 9, wherein: the vehicle body frame (11) is also provided with a supporting mechanism (14) which can be supported on the ground when the bed-chair transfer function is realized and is used for increasing the stability.

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