CN208770183U - a multifunctional wheelchair - Google Patents

Abstract

The utility model discloses a kind of multifunctional wheelchairs, and the pedestal including having wheel, further includes the adjustable lifting device being connected to above pedestal；Adjustable lifting device includes seat plate, with the hinged backrest in seat plate rear end, the second line of a couplet fishplate bar connecting with pedestal, and the support construction being articulated between seat plate and second line of a couplet fishplate bar；Support construction includes front support rod component, back support rod component；Adjustable lifting device further includes the driving mechanism for driving support construction rotation and/or for driving seat plate to go up and down, driving mechanism generates rotary motion or linear motion, so that the parallelogram mechanism that seat plate, front support rod component, second line of a couplet fishplate bar and back support rod component are formed is in unfolded state or receiving state.Because of the structure type cooperated using pedestal and adjustable lifting device, height, the angle of wheelchair main body are adjustable, have more wide applicability, suitable for the lathe bed of various height, and meet and lie low, Zuo Li, movement, receive a variety of use demands such as folded.

Description

a multifunctional wheelchair

technical field

The utility model relates to medical and nursing equipment, in particular to a multifunctional wheelchair for long-term bedridden patients or patients who cannot move independently.

Background technique

At present, wheelchairs designed for long-term bedridden or disabled people have a single function and can only meet some of the user's needs such as using the wheelchair to move. Multiple people carry and hold at the same time, which puts pressure on the patient's family members and care workers, which is time-consuming and labor-intensive and uncomfortable for users. Multiple family members or care workers looking at passport materials at the same time have caused huge economic pressure to the family. Therefore, there is an urgent need for a comprehensive, structured Flexible and versatile wheelchair that reduces the number of support staff.

Utility model content

The purpose of the utility model is to overcome the defects of the prior art and provide a multifunctional wheelchair.

To achieve the above object, the utility model adopts the following technical solutions:

A multifunctional wheelchair includes a base with wheels, and an adjustable lifting device connected above the base; the adjustable lifting device includes a seat plate, a backrest hinged with the rear end of the seat plate, and is connected with the base The lower connecting plate, and the support structure hinged between the seat plate and the lower connecting plate; the support structure includes a front support rod assembly and a rear support rod assembly; the adjustable lifting device also includes a drive for the support structure to rotate and/or Or a drive mechanism for driving the seat plate to lift and lower, the drive mechanism generates rotational motion or linear motion, so that the parallelogram mechanism formed by the seat plate, the front support rod assembly, the lower link plate and the rear support rod assembly is in a deployed state or stored state.

Its further technical scheme is: the upper support plate of the base is provided with a chute, and the lower part of the lower connecting plate is provided with a pulley that slides with the chute, so as to form a sliding and detachable type between the adjustable lifting device and the base. Alternatively, the lower connecting plate is the upper supporting plate of the base to form an integrated structure; or, the lower connecting plate is fixedly connected with the upper supporting plate provided on the base.

Its further technical scheme is as follows: the sliding detachable connection adopts a chute locking structure, which specifically includes a pair of blocks, two chute, two buffers, and two locking blocks arranged at the front and rear of the base; The two lock blocks extend downward through the upper panel of the base and are connected to the top of the unlocking frame. The unlocking frame is slidably connected to the lower part of the upper panel of the base through a guide rod. The guide rod is sleeved with a self-locking mechanism that stops under the unlocking frame. spring; the stopper stops against the fixed protrusion on the lower surface of the lower connecting plate of the adjustable lifting device.

Its further technical scheme is: the adjustable lifting device further comprises: a front baffle hinged with the front end of the seat plate; a front armrest hinged at the middle of the front end of the seat plate; A neck pillow; the front support rod assembly includes a left front support rod and a right front support rod, and the rear support rod assembly includes a left rear support rod and a right rear support rod.

A further technical solution is: the center of the seat plate is provided with a defecation through hole; the lower part of the seat plate is provided with an elastic frame-shaped bracket located below the defecation through hole to elastically support the excrement container.

Its further technical scheme is: the drive mechanism is an electric motor with a deceleration mechanism; the deceleration mechanism is provided with an output shaft and is drive-connected with the rotating shaft of either the front support rod assembly or the rear support rod assembly;

Or, the driving mechanism is a manual force-energizing rod that generates rotational power, the outer end of the rotating shaft of either the front support rod assembly or the rear support rod assembly is provided with a torsion coupling portion, and the manual forcing rod is connected to the torsion force The transmission connection of the connecting part;

Alternatively, the driving mechanism is a linear power mechanism arranged between any one of the lower connecting plate and the seat plate, the front support rod assembly, and the rear support rod assembly, and the linear power mechanism is an electric push rod, an air cylinder, an oil cylinder Or ball screw drive mechanism;

Alternatively, the driving mechanism is an air bag arranged between the lower connecting plate and the seat plate, and an air pump connected to the air path of the air bag;

Alternatively, the driving mechanism is a magnetic mechanism arranged between the lower connecting plate and the seat plate, and the magnetic mechanism includes a lower coil fixed on the upper surface of the lower connecting plate and an upper coil fixed on the lower surface of the seat plate. A drive circuit in which the coil and the lower coil are electrically connected; the upper coil and the lower coil generate a magnetic field of the same level, thereby generating a repulsive force for the seat plate to rise upward.

Its further technical scheme is: the left side and/or the right side of the base is hinged with an infusion support, and the infusion support is a rod-shaped structure with an axial length adjustment.

Its further technical scheme is as follows: the base is connected with a strut frame, and the strut frame is a gate-shaped frame structure, including a left side rod and a right side rod connected with the left rear side and the right rear side of the base, and A transverse push rod connected with the rear ends of the left and right rods; when the backrest and the seat plate are in a 180-degree unfolded state, the transverse push rod is clamped in a transverse slot provided on the back of the backrest.

A further technical solution is that right-angle handrails are hinged on both sides of the base, and the right-angle handrails are in a storage state when they are rotated forward by 90 degrees.

A further technical solution is as follows: the tops of the adjustable armrests are all provided with sockets for externally connecting the desk board.

Its further technical scheme is as follows: the front end of the base is provided with a foot pedal.

Beneficial effects compared to the prior art:

Compared with the traditional wheelchair, the multifunctional wheelchair of the present invention has the following significant advantages:

Because the utility model adopts the structural form of the base and the adjustable lifting device, the height and angle of the main body of the wheelchair can be adjusted, and the utility model has wider applicability, is suitable for beds of various heights, and satisfies the requirements of lying flat, sitting, standing, Various use requirements such as moving and folding; due to the sliding and detachable structure, it is convenient to use the wheelchair body and the base separately, and the weight is lighter, which reduces the physical expenditure of nurses and the patient's family, and is less used in mobile working conditions. In this case, multiple wheelchair bodies can share a base, reducing costs; the adjustable lifting device also includes a seat plate with a defecation hole in the center, a front baffle for supporting the calf, and a front armrest for users to lean on. and a neck pillow to support the head, which increases comfort and has higher safety; as a variety of power drive mechanisms can be used, manufacturers can flexibly choose according to different costs and production priorities; The pole stand, armrests to support the user's elbows, an external table board for placing items, and footrests for supporting the feet are fully functional and durable.

In order to more clearly understand the above objects, characteristics and advantages of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Description of drawings

FIG. 1 is a structural diagram of a specific embodiment of a multifunctional wheelchair of the present invention in a folded state;

Fig. 2 is a structural diagram of the specific embodiment of the multifunctional wheelchair shown in Fig. 1 in an unfolded state (lying down state);

FIG. 3 is a structural diagram of the specific embodiment of the multifunctional wheelchair shown in FIG. 1 in an unfolded state (sitting up state);

Fig. 4 is the side view of Fig. 2;

Figure 5 is a partial view of the base of the multifunctional wheelchair of the present invention shown in Figure 1;

FIG. 6 is a bottom perspective structural view of the adjustable lifting device of the multifunctional wheelchair of the present invention;

FIG. 7 is a schematic expanded view of the simplified support structure and driving mechanism of the adjustable lifting device in FIG. 6;

Fig. 8 is a side view of Fig. 5 (the caster is in an exploded state);

FIG. 9 is a bottom perspective structural view of FIG. 5 .

reference number

1 base 10 foot pedal

11 Infusion stand 12 Stop

13 Chute 14 Buffer

15 Lock block 16 Grab bar

17 Wheels 18 Self-locking springs

19 Unlocking bracket 111 The first electric actuator

112 Second electric actuator 113 Third electric actuator

114 Strut 115 Armrest Side Plate

116 Pedal link 117 Armrest lower link

2 Adjustable lift 21 Front bezel

22 Front Armrest 23 Neck Pillow

3 Seat plate 31 Defecation hole

4 backrest

5 Lower connecting plate 51 Upper roller

52 Roller 53 Transition Support Arm

54 Transition support shaft 55 Roller groove

56 Coupling head 57 Front lower support shaft

58 Push shaft 59 Front upper support shaft

6 Support structure

61 Front support rod assembly 62 Rear support rod assembly

63 Rear lower support shaft 64 Rear upper support shaft

7 Pole holder 71 Left pole

72 Cross putter

8 Right-Angle Armrest 9 External Desk Plate

Detailed ways

In the following specific description, many specific details are set forth in order to fully understand the present utility model, but the present utility model can also be implemented in other ways different from this description. Therefore, the protection scope of the present utility model is not subject to the following disclosure. The limitations of the specific embodiment.

As shown in FIG. 1 , a multifunctional wheelchair includes a base 1 with wheels 17 , and an adjustable lifting device 2 connected above the base 1 .

As shown in FIGS. 2-4 , the adjustable lifting device 2 includes a seat plate 3 , a backrest 4 hinged to the rear end of the seat plate 3 , a lower connecting plate 5 connected to the base 1 , and a lower connecting plate 5 hinged to the seat plate 3 and the lower connecting plate 5 . The support structure 6 between; the support structure 6 includes a front support rod assembly 61, a rear support rod assembly 62, the front support rod assembly 61 includes a left front support rod and a right front support rod, and the rear support rod assembly 62 includes a left rear support rod and a right rear support rod support rod. The adjustable lifting device 2 also includes a drive mechanism for driving the support structure 6 to rotate and/or for driving the seat plate 3 to rise and fall, and the drive mechanism generates a rotary motion or a linear motion, so that the seat plate 3, the front support rod assembly 61, the lower The parallelogram mechanism formed by the link plate 5 and the rear support rod assembly 62 is in a deployed state or a stowed state. When in the unfolded state, the multifunctional wheelchair of the utility model is in the working state, which can assist the nurse or the family member who takes care of the patient to perform daily cleaning activities for the user. When in the storage state, the multifunctional wheelchair of the utility model is folded and stored, with the smallest volume, and can be easily folded in any corner, thereby reducing the space occupied.

As shown in Figures 4 and 5, two sets of wheels 17 are symmetrically installed below the base 1. The wheels 17 and the base 1 are detachably threaded. Due to the different heights of the beds to which the present invention is applied, when the height of the adjustable lifting device 2 cannot meet the requirements of use, the wheels 17 on the base 1 are used to assist in adjusting the overall height of the multifunctional wheelchair, and the height adjustment range is suitable for use in the market. Most of the beds used have a wide range of versatility.

In Embodiment 1, as shown in FIGS. 6 and 7 , the front lower support shaft 57 , the front upper support shaft 59 , the rear lower support shaft 63 and the rear upper support shaft 64 constitute four hinge positions of the support structure 6 . The first electric push rod 111 is an electric telescopic rod. The fixed end of the first electric push rod 111 is hinged with the fixed bracket of the adjustable lifting device 2 (located on the lower connecting plate 5 and is a part of the lower connecting plate 5 ), and the movable end passes through the The coupling head 56 is sleeved on the outer ring of the push shaft 58, and each end of the push shaft 58 is provided with a roller 52. The rollers 52 roll in the roller grooves 55 set on the left front support rod and the right front support rod. The fixed bracket is also provided with a transition support shaft 54. Both ends of the transition support shaft 54 are hinged to the fixed bracket. The transition support arm 53 is provided at the proximal end of the transition support shaft 54 and is perpendicular to its axis. The top of the transition support arm 53 is provided with a larger diameter. Both ends of the small upper roller 51 and the push shaft 58 are also pivotally connected to the middle section of the transition support arm 53 respectively. During the ascending process of the adjustable lifting device 2, the outer surface of the roller 52 is in contact with the roller groove 55. When the movable end of the first electric push rod 111 extends, the roller 52 is driven to roll in the roller groove 55, and the seat plate 3 and the front support rod are moved. The parallelogram formed by the assembly 61 , the lower connecting plate 5 and the rear support rod assembly 62 is supported. When the adjustable lifting device 2 rises to a predetermined height (close to the maximum open state), the roller 52 is separated from the roller groove 55 and no supporting force is generated. At this time, the force arm becomes larger, and the reaction force received by the first electric push rod 111 becomes smaller, so that the adjustable lifting device 2 can be more stable in the open state. The advantage of such a support structure is that the initial force can be increased during the ascent of the adjustable lifting device 2, and the stroke of the electric push rod can be shortened. Increase service life. The upper roller 51 preferably adopts a stepped structure, that is, the diameter of both ends is smaller than that of the middle part.

In other embodiments, the upper support plate of the multifunctional wheelchair base 1 of the present invention is provided with a chute 13, and the lower part of the lower connecting plate 5 is provided with a pulley that slides with the chute 13, forming the adjustable lifting device 2 and the base. Sliding detachable coupling between 1.

As shown in FIG. 5 , FIG. 8 and FIG. 9 , in other embodiments, the adjustable lifting device 2 and the base 1 are detachably connected by a chute locking structure. The upper surface of the base 1 is provided with: four blocks 12 (one pair at the front and the other), two chutes 13, two buffers 14, and two lock blocks 15; the two lock blocks 15 pass through the upper panel of the base 1 ( That is, the upper surface) extends downward and is connected to the top of the unlocking frame 19. The unlocking frame 19 is slidably connected to the bottom of the upper panel of the base 1 through a guide rod. The guide rod is sleeved with a self-locking spring 18 that stops under the unlocking frame 19 . The buffer 14 is provided with a spring for buffering and shock absorption, so as to reduce the secondary injury caused to the user by the inertia during the assembly process. The stopper 12 is used to stop the fixed protrusions on the lower surface of the lower connecting plate 5 of the adjustable lifting device 2 (not shown in the figure, there are two groups, two near the front end and two near the rear end. 1, corresponding to the number of the stoppers 12) for the limit after assembly. When the multifunctional wheelchair is used in combination, the lower connecting plate 5 of the adjustable lifting device 2 is slid into the horizontal direction from the rear end of the base 1 to the front end along the chute 13 under the limiting action of the two chutes 13. When the fixed protrusion on the lower surface of the lower connecting plate 5 acts on the guide slope of the lock block 15, the lock block 15 is pressed down, and after the fixed protrusion near the rear end passes over the uppermost end of the lock block 15, the lock block 15 is self-locking. The spring force generated by the spring 18 to the unlocking frame 19 automatically pops up, and the fixed protrusion near the rear end is placed between the blocking block 12 and the locking block 15 at the rear end to form an assembled state. The use of the chute 13 and the buffer 14 ensures labor saving and safety in the assembly process, and the use of the stopper 12 and the lock block 15 ensures the firmness and reliability of the assembly effect. When the combined multifunctional wheelchair is disassembled, pressure is applied to the lock block 15, and the lock block 15 is pressed down until the upper surface is flush with the upper surface of the lower connecting plate 5, and the elastic force of the buffer 14 faces the opposite direction of assembly, so that the adjustable lift The device 2 is released from the locking connection with the base 1, and then the adjustable lifting device 2 is dragged by an external force to complete the disassembly. This structure saves time and effort in the disassembly process, and the operation can be completed by a single person. Specifically, when disassembling, the user steps down with his feet (or presses down with other working tools) the crossbar portion of the unlocking frame 19 to exert downward pressure on the unlocking frame 19, thereby overcoming the force of the self-locking spring 18. spring force, thereby driving the lock block 15 to press down until the upper surface is flush with the upper surface of the lower connecting plate 5, and the elastic force of the buffer 14 faces the opposite direction of assembly, so that the adjustable lifting device 2 is released from the locking connection with the base 1 (ie, disassembled). combined state), and then drag the adjustable lifting device 2 by external force to complete the split. The pedal-operated unlocking structure can reduce the work intensity of the splitting personnel, and is convenient and reliable. The stopper 12 in this embodiment is an inverted L-shaped structure to form a limiting cavity for accommodating the fixed protrusion, which can prevent the adjustable lifting device 2 from detaching from the base 1 upward in the assembled state.

In other embodiments, the lower connecting plate 5 is the upper supporting plate of the base 1, and the multifunctional wheelchair forms an integrated structure.

Alternatively, the lower connecting plate 5 is fixedly connected to the upper supporting plate provided on the base 1, and the connection method includes screw connection, welding, etc., the purpose is also to obtain a multi-functional wheelchair with an integrated structure and ensure the reliability and durability of the wheelchair.

As shown in Figure 2, the adjustable lifting device 2 also includes:

The front baffle 21 hinged with the front end of the seat plate 3, when the wheelchair is in the sitting-up working state, the front baffle 21 is inclined with the user's lower leg to provide support for the leg.

The front armrest 22 is hinged on the middle of the front end of the seat plate 3. When the wheelchair is in the sitting up working state, the front armrest 22 is rotated from a horizontal state to a vertical state for the user to hold and relieve the tension of the user during the movement of the wheelchair. mood.

The neck pillow 23 is arranged on the outer end of the backrest 4. The neck pillow 23 can be customized according to the needs of the user, and is fixedly connected to the outer end of the backrest 4 or forms an integral structure with the outer end of the backrest 4, or the outer end of the backrest 4 is provided with a slot, and the neck The lower part of the pillow 23 is provided with a matching post for movable connection.

As shown in FIG. 9 , in other embodiments, the fixed end of the second electric push rod 112 is fixedly connected with the bracket on the lower surface of the base 1 , and the movable end is hinged with the armrest lower link 117 , and the armrest lower link 117 is fixedly connected to the armrest side link. 115 is fixedly connected with the handrail bar 16 , and the handrail side connecting plate 115 is perpendicular to the handrail bar 16 . When the handrail 16 is in a horizontal state, it is in a retracted state, and the movable end of the second electric push rod 112 is in an extended state. In the working state, the movable end of the second electric push rod 112 shrinks, thereby driving the lower link 117 of the armrest to rotate. When the lower link 117 of the armrest rotates, the armrest side link 115 is fixedly connected to drive the armrest rod 16 to rotate upward, and the armrest rotates upward. The rod 16 is propped up for the user to support the elbow.

As shown in FIG. 9 , a pedal link 116 is sleeved in the middle of the armrest lower link 117 . One end of the pedal link 116 is hinged to the armrest lower link 117 , and the other end is hinged to the lower middle of the front pedal 21 . In the working state, the movable end of the second electric push rod 112 shrinks, thereby driving the lower armrest link 117 to rotate. When the armrest lower link 117 rotates, it drives the pedal link 116 to rotate, so that the connected front pedal 21 moves from the rear toward the Front swivel for users to relax their legs while sitting.

A further technical solution is shown in FIG. 8 , the fixed end of the third electric push rod 113 is fixedly connected to the fixed bracket of the base 1, and the movable end is hinged with the lower end of the strut 114. It can be seen from FIG. 1 to FIG. 3 that the strut 114 It is vertically and fixedly connected with the left rod 71 and the right rod, and when the backrest 4 is unfolded at an angle of more than 90 degrees, the third electric push rod 113 rotates, and then drives the support rod 114, the left rod 71 and the right rod to rotate upward, horizontally. When the push rod 72 is in contact with the lower surface of the backrest 4 , the driving mechanism stops driving to reach a stable state, giving the backrest 4 sufficient supporting force to ensure the stable support of the user's back.

The electric push rods in the above embodiments can be replaced by other linear power mechanisms, such as a ball screw mechanism or a screw mechanism with a motor, and a cylinder or oil cylinder connected with a pressure source.

As shown in FIGS. 2 and 3 , a defecation through hole 31 is provided in the center of the seat plate 3 , and an elastic frame-shaped bracket located below the defecation through hole 31 is arranged under the seat plate 3 to support the excrement container with elastic force and improve the excrement container. The effectiveness of the support and the convenience of disassembly and replacement of the container.

In other embodiments, the center of the seat plate 3 is provided with a defecation through hole 31 for the user to excrete daily on the wheelchair, and a chute or a bracket is provided below the seat plate 3, and the chute or bracket is located below the defecation through hole 31. , used to slidingly connect or support the excrement container, and the excrement container can be a bedpan, a disposable excretion bag or others according to specific needs.

In other embodiments, the driving mechanism of the multifunctional wheelchair of the present invention is an electric motor with a deceleration mechanism; the deceleration mechanism is provided with an output shaft and is connected to the rotating shaft of either the front support rod assembly 61 or the rear support rod assembly 62. .

In other embodiments, the driving mechanism is a manual booster rod that generates rotational power, the outer end of the rotation shaft of either the front support rod assembly 61 or the rear support rod assembly 62 is provided with a torsion coupling portion, and the manual booster rod and the torsion coupling portion are Transmission connection.

In other embodiments, the driving mechanism is a linear power mechanism disposed between any one of the lower connecting plate 5 and the seat plate 3, the front support rod assembly 61, and the rear support rod assembly 62, and the linear power mechanism is an electric push rod, an air cylinder. , oil cylinder or ball screw drive mechanism.

In other embodiments, the driving mechanism is an air bag disposed between the lower connecting plate 5 and the seat plate 3, and an air pump connected to the air path of the air bag.

In other embodiments, the driving mechanism is a magnetic mechanism arranged between the lower connecting plate 5 and the seat plate 3, and the magnetic mechanism includes a lower coil fixed on the upper surface of the lower connecting plate 5 and an upper coil fixed under the seat plate 3, and The drive circuit is electrically connected with the upper coil and the lower coil; the upper coil and the lower coil generate the same-level magnetic field, thereby generating the repulsive force that the seat plate 3 rises upward.

As shown in Figures 2-3, an infusion support 11 is hinged on the left and/or right side of the base 1, and the infusion support 11 is a rod-shaped structure with an axial length adjustment. When defecation or other daily cleaning work is performed on the multifunctional wheelchair, the infusion support 11 is used to hang the infusion bottle/bag after being stretched to the required height from the storage state.

In other embodiments, the base 1 is connected with a strut frame 7, and the strut frame 7 is a door-shaped frame structure, including a left rod 71 and a right rod connected to the left rear side and the right rear side of the base 1. The left rod 71 and the rear end of the right rod are connected to the transverse push rod 72 . The strut frame 7 is used for the nursing staff or the patient's family to push the wheelchair to move from the back of the wheelchair. When the backrest 4 and the seat plate 3 are in a 180-degree unfolded state, the transverse push rod 72 is clamped to the back of the backrest 4. The transverse slot provided It provides upward support for the 4 parts of the backrest to ensure the safety of the patient in the state of lying on the back such as shampooing and bathing.

In other embodiments, right-angled armrests 8 are hinged on both sides of the base 1 , and the right-angled armrests 8 are in the storage state when they are rotated forward by 90 degrees. When the right-angled armrest 8 is in a vertical state, it is in a use state for the user to lean on. Furthermore, the top of the right-angled armrest 8 is provided with sockets for the external table board 9. When the user needs to eat, read, bathe and other activities on the multi-functional wheelchair, the external table board 9 is used to place the necessary necessary. items and equipment.

In other embodiments, the front end of the base 1 is provided with a foot pedal 10 for supporting the feet, which is more conducive to the use of elderly or chronically ill persons with inconvenience in excretion, and relieves the pressure of defecation.

The utility model also discloses the following technical solutions:

A labor-saving short-stroke connecting rod structure can be used for lifting and lowering items such as tables and chairs, and is especially suitable for product structures with small space. The specific structure is as follows: a labor-saving short-stroke connecting rod structure includes an upper connecting plate (the seat plate in the embodiment of FIGS. 1-9 ), a lower connecting plate, and a connecting plate hinged between the upper connecting plate and the lower connecting plate a support structure; the support structure includes a front support rod assembly, a rear support rod assembly, and a drive mechanism for driving the support structure to rotate, the drive mechanism generates linear motion, so that the upper link plate, the front support rod assembly, the The parallelogram mechanism formed by the lower link plate and the rear support rod assembly is in an unfolded state or a storage state; the front support rod assembly includes a left front support rod and a right front support rod, and the rear support rod assembly includes a left rear support rod and a right front support rod Rear support rod; the driving mechanism is an electric telescopic rod; the fixed end of the electric telescopic rod is hinged with the lower connecting plate, the movable end of the electric telescopic rod is sleeved on the outer ring of the push shaft through the coupling head, and each end of the push shaft is provided with a roller , the rollers roll in the roller grooves set on the left front support rod and the right front support rod. The lower connecting plate is also provided with a transition support shaft. Both ends of the transition support shaft are hinged with the lower connection plate. The axis of the transition support arm is perpendicular, the top end of the transition support arm is provided with an upper roller, and the two ends of the push shaft are also pivotally connected to the middle section of the transition support arm. During the rising process, the outer surface of the roller is in contact with the roller groove. When the movable end of the electric telescopic rod extends, the roller is driven to roll in the roller groove, and the upper connecting plate, the front support rod assembly, the lower connecting plate and the rear support rod assembly are composed. The parallelogram holds up. When the adjustable lifting device rises to a predetermined height (close to the maximum open state), the rollers are separated from the roller grooves, and no supporting force is generated. At this time, the force arm becomes larger, and the reaction force received by the first electric push rod becomes smaller, so that the adjustable lifting device can be more stable in the open state. The advantage of such a support structure is that it can increase the initial force during the ascending process of the adjustable lifting device, and shorten the stroke of the electric push rod. service life. The upper roller preferably adopts a stepped structure, that is, the diameter of both ends is smaller than that of the middle part.

The labor-saving short-stroke connecting rod structure of the present invention can be used in multi-functional wheelchairs, as shown in the embodiments of Figs. 1-9, and may also be used in various chair structures, such as student seats, car seats chair, etc.

The utility model also discloses a linkage linkage mechanism for the seat; the seat comprises a base, a handrail hinged on both sides of the base, and a footrest hinged with the front end of the base; and further comprises a base and a handrail. The fixed end of the linear drive mechanism is fixedly connected with the bracket of the base, the movable end is hinged with the lower link of the armrest, and the lower link of the armrest is fixedly connected with the armrest bar through the fixed connection of the armrest side plate; the armrest bar is in a horizontal state When it is in a retracted state, the movable end of the linear drive mechanism is in an extended state; in the working state, the movable end of the linear drive mechanism shrinks, thereby driving the lower link of the armrest to rotate. The armrest side connecting plate drives the armrest bar to rotate upward, and the armrest bar is supported for the user to support the elbow.

A further technical solution is: a pedal link is sleeved in the middle of the lower link of the armrest, one end of the pedal link is hinged to the lower link of the armrest, and the other end is hinged to the lower middle of the front pedal; in the working state, the movable end of the linear drive mechanism shrinks, Therefore, the lower link of the armrest is driven to rotate. When the lower link of the armrest rotates, the pedal link is driven to rotate, so that the connected front pedal rotates from the rear to the front, so that the user can relax the legs when sitting.

A linkage linkage mechanism for a seat of the present invention can be used in a multifunctional wheelchair, as shown in the embodiments of Figs. 1-9, and may also be used in various chair structures, such as folding seats, automobile Seats etc.

To sum up, the multifunctional wheelchair of the present invention adopts the structural form of the base and the adjustable lifting device, the height and angle of the wheelchair body can be adjusted, and it has wider applicability and is suitable for various heights. The bed can meet various needs such as lying down, sitting, moving, and folding; because of the sliding and detachable structure, it is convenient to use the wheelchair body and the base separately, and the weight is lighter, which reduces the physical strength of the nurses and the patient's family members. Costs, and in the case of less mobile working state applications, multiple wheelchair bodies can share a base to reduce costs; because the adjustable lifting device also includes a seat plate with a defecation through hole in the center, a seat for supporting the calf part. The front baffle, the front armrest for the user to lean on, and the neck pillow to support the head increase the comfort and have higher safety; because a variety of power drive mechanisms can be used, manufacturers can choose according to different costs and production. Focus on flexible choices; the base is additionally equipped with a support rod frame for pushing the wheelchair, armrests for supporting the user's elbows, an external table board for placing items, and footrests for supporting the feet, which are fully functional and durable.

The above is only to further illustrate the technical content of the present utility model with examples, so as to facilitate understanding, but it does not mean that the embodiments of the present utility model are limited to this. New type of protection. The protection scope of the present utility model is subject to the claims.

Claims (10)

1. A multifunctional wheelchair comprises a base with wheels, and is characterized in that: also comprises an adjustable lifting device which is connected above the base; the adjustable lifting device comprises a seat plate, a backrest hinged with the rear end of the seat plate, a lower connecting plate connected with the base and a supporting structure hinged between the seat plate and the lower connecting plate; the supporting structure comprises a front supporting rod assembly and a rear supporting rod assembly; the adjustable lifting device also comprises a driving mechanism for driving the supporting structure to rotate and/or driving the seat plate to lift, and the driving mechanism generates rotary motion or linear motion so as to enable a parallelogram mechanism formed by the seat plate, the front supporting rod assembly, the lower connecting plate and the rear supporting rod assembly to be in a unfolding state or a folding state.

2. The multifunctional wheelchair as claimed in claim 1, wherein the upper supporting plate of the base is provided with a chute, and a pulley slidably fitted with the chute is provided below the lower connecting plate to form a sliding detachable connection between the adjustable lifting device and the base;

or the lower connecting plate is an upper supporting plate of the base to form an integrated structure;

or the lower connecting plate is fixedly connected with an upper supporting plate arranged on the base.

3. The multi-function wheelchair as claimed in claim 1, wherein said adjustable lifting means further comprises:

the front baffle is hinged with the front end of the seat plate;

the front handrail is hinged to the middle part of the front end of the seat plate;

the neck pillow is arranged at the outer end of the backrest;

the front supporting rod assembly comprises a left front supporting rod and a right front supporting rod, and the rear supporting rod assembly comprises a left rear supporting rod and a right rear supporting rod.

4. The multi-function wheelchair as claimed in claim 1, wherein the seat plate is centrally provided with a defecation through hole;

an elastic frame-shaped bracket positioned below the defecation through hole is arranged below the seat plate to elastically support the excrement container.

5. Multifunctional wheelchair in accordance with one of claims 1 to 4,

the driving mechanism is a motor with a speed reducing mechanism; the speed reducing mechanism is provided with an output shaft and is in transmission connection with a rotating shaft of either the front support rod assembly or the rear support rod assembly;

or,

the driving mechanism is a manual force applying rod which generates rotary power, the outer end of the rotating shaft of either the front support rod assembly or the rear support rod assembly is provided with a torsion connecting part, and the manual force applying rod is in transmission connection with the torsion connecting part;

in the alternative to this, either,

the driving mechanism is a linear power mechanism arranged between the lower connecting plate and any one of the seat plate, the front support rod assembly and the rear support rod assembly, and the linear power mechanism is an electric push rod, an air cylinder, an oil cylinder or a ball screw transmission mechanism;

in the alternative to this, either,

the driving mechanism is an air bag arranged between the lower connecting plate and the seat plate and an air pump connected with an air passage of the air bag;

in the alternative to this, either,

the driving mechanism is a magnetic mechanism arranged between the lower connecting plate and the seat plate, and the magnetic mechanism comprises a lower coil fixed on the upper surface of the lower connecting plate, an upper coil fixed on the lower surface of the seat plate, and a driving circuit electrically connected with the upper coil and the lower coil; the upper coil and the lower coil generate magnetic fields of the same level, and then generate repulsive force for lifting the seat plate upwards.

6. The multifunctional wheelchair as claimed in any one of claims 1 to 4, wherein the infusion support is hinged to the left and/or right side of the base and has an axial length adjustable rod-like structure.

7. The multi-function wheelchair as claimed in any one of claims 1 to 4, wherein a brace frame is coupled to the base, the brace frame having a gate-shaped frame structure including left and right side bars coupled to left and right rear sides of the base, and a transverse push bar coupled to rear ends of the left and right side bars; when the backrest and the seat plate are in a 180-degree unfolding state, the transverse push rod is clamped in a transverse clamping groove formed in the back face of the backrest.

8. The multifunctional wheelchair as claimed in any one of claims 1 to 4, wherein right-angled armrests are hinged to both sides of the base, and are in a storage state when rotated forward by 90 degrees.

9. The multifunctional wheelchair as claimed in claim 8, wherein the top of each of the adjustable armrests is provided with a socket for connecting the table.

10. The multifunctional wheelchair as claimed in claim 1, wherein a foot pedal is provided at the front end of the base.