CN108498245A - A kind of multifunctional wheelchair - Google Patents

Abstract

Include the pedestal with wheel the invention discloses a kind of multifunctional wheelchair, further includes the adjustable lifting device being connected to above pedestal；Adjustable lifting device includes seat, with the hinged backrest in seat rear end, the second line of a couplet fishplate bar being connect with pedestal, and the support construction being articulated between seat 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 to lift, driving mechanism generates rotary motion or linear motion, so that the parallelogram mechanism that seat, 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 coordinated using pedestal and adjustable lifting device, height, the angle of wheelchair main body are adjustable, have more wide applicability, are 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 invention relates to medical care equipment, in particular to a multifunctional wheelchair for bedridden patients or patients who cannot move independently.

Background technique

At present, wheelchairs designed for long-term bedridden or mobility-impaired persons have a single function and can only meet some of the user's needs such as moving in a wheelchair, and because the structure is fixed and cannot be changed, when the user moves from the bed to the wheelchair, it is often necessary to Many people lift and hug at the same time, which puts pressure on the patient's family members and nurses. It is time-consuming and labor-intensive and the user is uncomfortable. Multiple family members or nurses take care of the materials at the same time, causing huge economic pressure on the family. Flexible, multifunctional wheelchair that reduces the number of support staff.

Contents of the invention

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

To achieve the above object, the present invention adopts the following technical solutions:

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

Its further technical solution 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 slidingly matched with the chute to form a sliding and detachable sliding mechanism between the adjustable lifting device and the base. connection; or, the lower connection plate is the upper support plate of the base to form an integrated structure; or, the lower connection plate is fixedly connected with the upper support plate provided on the base.

Its further technical solution is: the sliding and detachable connection adopts a chute locking structure, which specifically includes a pair of stoppers at the front and back of the base, two chutes, two buffers, and two locking blocks; 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 bottom of the upper panel of the base through a guide rod. The 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 solution is: the adjustable lifting device also includes: a front baffle hinged with the front end of the seat board; a front armrest hinged at the middle of the front end of the seat board; 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.

Its further technical solution is: a through-hole for defecation is provided in the center of the seat board; an elastic frame-shaped support located below the through-hole for defecation is provided under the seat board to support the excrement container with elastic force.

Its further technical solution is: the driving mechanism 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 any one of the front support rod assembly or the rear support rod assembly;

Alternatively, the driving mechanism is a manual booster rod that generates rotational power, and the outer end of the rotating shaft of any one of the front support rod assembly or the rear support rod assembly is provided with a torsion coupling part, and the manual booster rod and the torsion force The transmission connection of the coupling part;

Alternatively, 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 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 drive mechanism is a magnetic mechanism arranged between the lower connecting plate and the seat, and the magnetic mechanism includes a lower coil fixed on the lower connecting plate and an upper coil fixed on the lower side of the seat, and is connected with the upper coil. A driving 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 board to rise upward.

Its further technical solution is: the left and/or right hinges of the base are provided with an infusion support, and the infusion support is a rod-shaped structure with an axial length adjustment.

Its further technical solution is: the base is connected with a strut frame, and the strut frame is a door-shaped frame structure, including a left side bar and a right side bar connected with the left rear side and the right rear side of the base, and A push rod connected to the rear ends of the left and right rods; when the backrest and the seat board are in a 180-degree unfolded state, the push rod is snapped into the transverse slot provided on the back of the backrest.

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

Its further technical solution is: the tops of the adjustable armrests are all provided with sockets for connecting external table boards.

Its further technical solution is: the front end of the base is provided with a pedal.

Beneficial effects compared with prior art:

A kind of multifunctional wheelchair of the present invention has the following significant advantages compared with traditional wheelchairs:

Due to the combination of the base and the adjustable lifting device, the present invention can adjust the height and angle of the main body of the wheelchair, and has wider applicability. , foldable and other use requirements; because of the sliding and detachable structure, it is convenient to use the wheelchair body and the base separately, the weight is lighter, and the physical expenditure of the nurses and the patient's family members is reduced, and it is less used in the mobile working state. , multiple wheelchair bodies can share a base, reducing costs; because the adjustable lifting device also includes a seat plate with a through-hole for defecation in the center, a front baffle for supporting the calf, a front armrest for the user to lean on and The neck pillow that supports the head increases comfort and has higher safety; because a variety of power drive mechanisms can be used, manufacturers can choose flexibly according to different costs and production priorities; the base is also equipped with a wheelchair for pushing the wheelchair A pole frame, armrests to support the user's elbows, an external table for placing items, and a footrest to support the feet are versatile and durable.

In order to understand the above-mentioned purpose, characteristics and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

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

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

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

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

Fig. 5 is a partial view of the base of the multifunctional wheelchair of the present invention shown in Fig. 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 diagram showing the simplified supporting 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 sign

1 Base 10 Footrest

11 Infusion stand 12 Stopper

13 Chute 14 Buffer

15 Lock block 16 Grab bar

17 Wheels 18 Self-locking springs

19 Unlock frame 111 The first electric actuator

112 The second electric actuator 113 The third electric actuator

114 Strut 115 Armrest side link

116 Pedal link 117 Armrest lower link

2 Adjustable Lift 21 Front Bezel

22 Front Armrest 23 Neck Pillow

3 seat plate 31 through hole for defecation

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 strut assembly 62 Rear strut assembly

63 Rear lower support shaft 64 Rear upper support shaft

7 Pole bracket 71 Left pole

72 push rod

8 Right-angle armrest 9 External table top

Detailed ways

In the following specific description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from this description, therefore, the protection scope of the present invention is not limited by the specific implementation disclosed below. Example limitations.

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

As shown in Figure 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. Support structure 6 between; Support structure 6 comprises front support rod assembly 61, rear support rod assembly 62, front support rod assembly 61 comprises left front support rod and right front support rod, rear support rod assembly 62 comprises left rear support rod and right rear support rod. The adjustable lifting device 2 also includes a driving mechanism for driving the support structure 6 to rotate and/or for driving the seat board 3 to lift, and the driving mechanism generates a rotary motion or a linear motion so that the seat board 3, the front support rod assembly 61, the lower The parallelogram mechanism formed by the connecting plate 5 and the rear support rod assembly 62 is in an expanded state or a stored state. When in the unfolded state, the multifunctional wheelchair of the present invention is in the working state, and can assist nurses or family members who take care of patients to perform daily cleaning activities for users. When in the storage state, the multifunctional wheelchair of the present invention is folded and stored, and has the smallest volume, and can be easily folded in any corner, reducing the space occupation.

As shown in Fig. 4 and Fig. 5, two groups of wheels 17 are installed symmetrically under the base 1. The wheels 17 and the base 1 are detachably threaded. Due to the different heights of the beds applicable to the present invention, 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 its adjustable height range is suitable for use on the market Most of the bed, with 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 support of the adjustable lifting device 2 (located on the lower connecting plate 5 and belongs to a part of the lower connecting plate 5), and the movable end passes through The coupling head 56 is sleeved on the outer ring of the push shaft 58, and a roller 52 is respectively provided at both ends of the push shaft 58, and the roller 52 rolls in the roller groove 55 provided on the left front support rod and the right front support rod. The fixed bracket is also provided with a transition support rotating shaft 54, and the transition support rotating shaft 54 two ends are hinged with the fixed support, and the near two ends of the transition support rotating shaft 54 are provided with a transition support arm 53 perpendicular to its axis, and the transition support arm 53 top is provided with a The two ends of the small upper roller 51 and the push shaft 58 are respectively pivotally connected to the middle section of the transition support arm 53 . During the ascent 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 stretches out, the roller 52 is driven to roll in the roller groove 55, and the seat plate 3 and the front support rod The parallelogram formed by the assembly 61, the lower connecting plate 5 and the rear support rod assembly 62 is propped up. When the adjustable lifting device 2 rose to a predetermined height (close to the maximum open state), the rollers 52 broke away from the roller grooves 55 and did not produce support force. At this time, the moment 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 it can increase the initial force during the ascent of the adjustable lifting device 2 and shorten the stroke of the electric push rod. Increase service life. Wherein 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 bottom of the lower connecting plate 5 is provided with a pulley that slides and fits with the chute 13, forming an adjustable lifting device 2 and the base 1. Sliding detachable joint between.

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 sliding groove locking structure. The upper surface of the base 1 is provided with: four stoppers 12 (respectively a pair at the front and back), two slide grooves 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 downwards and is connected to the top of the unlocking frame 19, and the unlocking frame 19 is slidably connected to the bottom of the upper panel of the base 1 through a guide rod, and the guide rod is sleeved with a self-locking spring 18 that stops at the bottom of the unlocking frame 19 . The inside of the buffer 14 is provided with a shock-absorbing spring to reduce the secondary injury caused by the inertia in the assembly process to the user. Block 12 is used to stop the fixed protrusion on the lower connecting plate 5 lower surface of adjustable lifting device 2 (not shown in the figure, there are two groups, two groups are provided near the front end, and two groups are provided near the rear end. 1, corresponding to the number of stoppers 12), used 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 of the front end from the rear end of the base 1 along the chute 13 under the limit action of the two chute 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. The spring force that spring 18 produces to unlocking rack 19 automatically pops up, and the fixed protrusion near the rear end is placed between the stopper 12 and the lock block 15 at the rear end to form an assembly combination state. Due to the use of the chute 13 and the buffer 14, the labor-saving and safety of the assembly process is ensured, and the use of the block 12 and the lock block 15 ensures a firm and reliable 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 releases 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 a single person can complete the operation. When specifically disassembling, the user steps down with his feet (or presses down with other working tools) on the crossbar part of the unlocking frame 19, and applies downward pressure to the unlocking frame 19, thereby overcoming the force of the self-locking spring 18. The spring force drives the locking 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 (i.e. disassembly Combined state), then the adjustable lifting device 2 is dragged by external force to complete the split. This foot-operated unlocking structure can reduce the working intensity of the dismantling personnel, and is convenient and reliable. The structure of the block 12 in this embodiment is an inverted L shape to form a limiting cavity for accommodating the fixing protrusion. In the assembled and combined state, the adjustable lifting device 2 can be prevented from detaching from the base 1 upwards.

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 support plate provided on the base 1, and the connection methods include screw connection, welding, etc., and the purpose is also to obtain a multifunctional wheelchair with an integrated structure to ensure the reliability and durability of the wheelchair.

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

The front fender 21 hinged with the front end of the seat plate 3, when the wheelchair is in the working state of sitting up, the front fender 21 cooperates with the user's calf to tilt to provide support to the leg.

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

The neck pillow 23 located at the outer end of the backrest 4 can be customized according to the user's needs. Pillow 23 bottoms are provided with supporting post and carry out movable connection.

As shown in Figure 9, in other embodiments, the fixed end of the second electric push rod 112 is fixedly connected to the support on the lower surface of the base 1, and the movable end is hinged to the lower armrest link 117, and the armrest lower link 117 is fixedly connected to the armrest side connecting plate. 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 bar 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 armrest lower link 117 to rotate, while the armrest lower link 117 rotates, the armrest rod 16 is driven to rotate upward through the fixedly connected armrest side connecting plate 115, and the armrest Rod 16 is raised for the user to support the elbow.

A further technical solution is shown in FIG. 9 . The middle part of the lower armrest link 117 is covered with a pedal link 116 . In the working state, the movable end of the second electric push rod 112 shrinks, thereby driving the armrest lower link 117 to rotate, and while 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 to The front swivels to provide relief to the user's legs while sitting.

A further technical solution is shown in Figure 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 to the lower end of the strut 114. It can be seen from FIGS. 1-3 that the strut 114 It is vertically fixedly connected with the left side bar 71 and the right side bar. When the backrest 4 is deployed at an angle greater than 90 degrees, the third electric push rod 113 rotates, and then drives the rotation of the support bar 114, the left side bar 71, and the right side bar. When the push rod 72 is in contact with the lower surface of the backrest 4, the drive mechanism stops driving and reaches a stable state, giving the backrest 4 sufficient supporting force to ensure the smooth support of the user's back.

The electric push rods in the above embodiments can be replaced by other linear power mechanisms, such as ball screw mechanisms or screw mechanisms with motors, and cylinders or oil cylinders connected with pressure sources.

As shown in Figures 2 and 3, the center of the seat board 3 is provided with a defecation through hole 31, and the bottom of the seat board 3 is provided with an elastic frame-shaped support positioned at the bottom of the defecation through hole 31 to support the excrement container with elastic force and improve the excrement container. The effectiveness of support and the convenience of container disassembly and replacement.

In other embodiments, the center of the seat board 3 is provided with a defecation through hole 31 for daily excretion of the user on the wheelchair, and a chute or bracket is provided under the seat board 3, and the chute or bracket is located below the defecation through hole 31 , for slidingly connecting or supporting the excrement container, and the excrement container can be a bedpan, a disposable excrement 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 coupled with the rotating shaft of any one of 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, and the outer end of the rotating 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 torque coupling portion Transmission connection.

In other embodiments, the drive mechanism is a linear power mechanism located between the lower connecting plate 5 and the seat plate 3, the front support rod assembly 61, and the rear support rod assembly 62. The linear power mechanism is an electric push rod, a cylinder, etc. , Cylinder or ball screw drive mechanism.

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

In other embodiments, the drive mechanism is a magnetic mechanism located between the lower connecting plate 5 and the seat 3, the magnetic mechanism includes a lower coil fixed on the lower connecting plate 5 and an upper coil fixed below the seat 3, and A drive circuit electrically connected to the upper coil and the lower coil; the upper coil and the lower coil generate a magnetic field of the same level, thereby generating a repulsive force for the seat plate 3 to rise upward.

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

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 side bar 71 and a right side bar connected with the left rear side and the right rear side of the base 1, and a Left side bar 71, the horizontal push bar 72 that right side bar rear end connects. The strut frame 7 is used for the nurse or the family member of the patient to push the wheelchair from the rear to carry out activities. When the backrest 4 and the seat board 3 are in the 180-degree unfolded state, the horizontal push rod 72 is snapped into the horizontal slot provided on the back of the backrest 4 Inside, it provides upward support for the 4 parts of the backrest to ensure the safety of the patient in the state of lying down when washing hair and taking a bath.

In other embodiments, right-angled armrests 8 are hinged on both sides of the base 1, and when the right-angled armrests 8 are rotated 90 degrees forward, they are in a storage state. Under the vertical state of the right-angled handrail 8, it is a state of use for users to lean on. Furthermore, the tops of the right-angled armrests 8 are equipped with sockets for the external table 9. When the user needs to eat, read, bathe and other activities on the multifunctional wheelchair, the external table 9 is used to place the necessary items utensils.

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

The present invention also discloses the following technical solutions simultaneously:

A labor-saving short-stroke connecting rod structure, which can be used for lifting tables and chairs, and is especially suitable for product structures with small spaces. The specific structure is: a labor-saving short-stroke connecting rod structure includes an upper connecting plate (in the embodiment of Fig. 1-9, a seat plate), a lower connecting plate, and a connecting rod hinged between the upper connecting plate and the lower connecting plate. Support structure; the support structure includes a front support rod assembly and a rear support rod assembly; it also includes a drive mechanism for driving the support structure to rotate, and the drive mechanism generates linear motion so that the upper connecting plate, the front support rod assembly, The parallelogram mechanism formed by the lower connecting plate and the rear support rod assembly is in the unfolded state or the 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 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 joint head, and a roller is provided at each end of the push shaft , the rollers roll in the roller grooves set on the left front support rod and the right front support rod, the lower joint plate is also provided with a transition support shaft, the two ends of the transition support shaft are hinged with the lower joint plate, and the transition support shaft is provided with a The transition support arm whose axis is perpendicular to each other has an upper roller shaft arranged at the top of the transition support arm, and the two ends of the push shaft are respectively 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 is stretched out, the roller is driven to roll in the roller groove, and the upper connecting plate, the front supporting rod assembly, the lower connecting plate and the rear supporting rod assembly are composed parallelogram propped up. When the adjustable lifting device rises to a predetermined height (close to the maximum open state), the rollers break away from the roller grooves without generating support force, and the upper roller shaft at the top of the transition support arm contacts the edges of both sides of the roller grooves to generate support At this time, the moment 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 ascent of the adjustable lifting device and shorten the stroke of the electric push rod. service life. Wherein the upper roller preferably adopts a stepped structure, that is, the diameter of both ends is smaller than that of the middle part.

A labor-saving short-stroke connecting rod structure of the present invention can be used in multifunctional wheelchairs, as shown in the embodiments of Figures 1-9, and may also be used in various chair structures, such as student seats and car seats Wait.

The invention also discloses a linkage linkage mechanism for a seat; the seat includes a base, an armrest bar hinged to both sides of the base, and a foot pedal hinged to the front end of the base; The linear drive mechanism in between; 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 rod through the fixedly connected armrest side connecting plate; when the armrest rod is in a horizontal state , which is the contracted state, the movable end of the linear drive mechanism is in the 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, while the lower link of the armrest rotates, and then through the fixedly connected armrest The side connecting plate drives the armrest bar to rotate upwards, and the armrest bar is propped up for the user to support the elbow.

A further technical solution is: the middle part of the lower link of the armrest is covered with a pedal link, 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 part of the front pedal; in the working state, the movable end of the linear drive mechanism shrinks, Thereby, the lower link of the armrest is driven to rotate, and when the lower link of the armrest rotates, the pedal link is driven to rotate, so that the connected front pedal is rotated from the rear to the front, so as to relieve the legs when the user sits.

A linkage link mechanism for seats of the present invention can be used for multifunctional wheelchairs, as shown in the embodiments of Figures 1-9, and may also be used in various chair structures, such as folding seats and car seats chair etc.

To sum up, the multifunctional wheelchair of the present invention adopts the structural form of the base and the adjustable lifting device, and the height and angle of the wheelchair main body can be adjusted, so it has wider applicability and is suitable for wheelchairs of various heights. The bed meets various needs such as lying flat, 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, reducing the physical expenditure of nurses and patients' families , and in the case of less mobile working conditions, multiple wheelchair bodies can share one base to reduce costs; because the adjustable lifting device also includes a seat board with a through-hole for defecation in the center, and a front seat for supporting the lower leg. The 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, the manufacturer can base on different costs and production priorities Choose flexibly; the base is also equipped with a pole frame for pushing the wheelchair, an armrest for supporting the user's elbow, an external table for placing items, and a footrest for supporting the foot, which is comprehensive and durable.

The above only uses examples to further illustrate the technical content of the present invention for easy understanding, but it does not mean that the embodiment of the present invention is limited thereto. Any technical extension or re-creation according to the present invention is protected by the present invention. The protection scope of the present invention shall be determined by the claims.

Claims (10)

1. A multifunctional wheelchair, comprising a base with wheels, characterized in that: it also includes an adjustable lifting device connected above the base; the adjustable lifting device includes a seat plate, which is hinged to the rear end of the seat plate The backrest, the lower connecting plate connected with the base, and the support structure hinged between the seat plate and the lower connecting plate; the supporting structure includes a front support rod assembly and a rear support rod assembly; the adjustable lifting device also includes a A drive mechanism that drives the support structure to rotate and/or is used to drive the seat board up and down. The mechanism is in an expanded state or a retracted state. 2. The multifunctional wheelchair according to claim 1, characterized in that, 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 slidingly matched with the chute to form an adjustable wheelchair. Sliding and detachable connection between the lifting device and the base; Alternatively, the lower connecting plate is the upper supporting plate of the base to form an integrated structure; Alternatively, the lower connecting plate is fixedly connected to the upper supporting plate provided on the base. 3. The multifunctional wheelchair according to claim 1, wherein the adjustable lifting device further comprises: a front baffle hinged to the front end of the seat; the front armrest hinged at the middle of the front end of the seat board; a neck pillow provided at the outer end of said backrest; The front support bar assembly includes a left front support bar and a right front support bar, and the rear support bar assembly includes a left rear support bar and a right rear support bar. 4. The multifunctional wheelchair according to claim 1, characterized in that, the center of the seat board is provided with a through hole for defecation; An elastic frame-shaped support located below the defecation through hole is provided under the seat board to support the excrement container with elastic force. 5. The multifunctional wheelchair according to any one of claims 1-4, characterized in that, The driving mechanism 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 any one of the front support rod assembly or the rear support rod assembly; or, The driving mechanism is a manual booster rod that generates rotational power, and 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 part, and the manual booster rod and the torque coupling part transmission connection; or, 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. The linear power mechanism is an electric push rod, an air cylinder, an oil cylinder or a ball wire lever transmission mechanism; or, The driving mechanism is an air bag arranged between the lower connecting plate and the seat plate, and an air pump connected with the air path of the air bag; or, The driving mechanism is a magnetic mechanism located between the lower connecting plate and the seat, and the magnetic mechanism includes a lower coil fixed on the lower connecting plate and an upper coil fixed below the seat, and is connected with the upper coil and the lower coil. A drive circuit electrically connected to the coils; the upper coil and the lower coil generate a magnetic field of the same level, thereby generating a repulsive force for the seat board to rise upwards. 6. The multifunctional wheelchair according to any one of claims 1-4, characterized in that, the left and/or right sides of the base are hinged with an infusion support, and the infusion support is an axial length adjustable Rod structure. 7. The multifunctional wheelchair according to any one of claims 1-4, characterized in that, the base is connected with a strut frame, and the strut frame is a door-shaped frame structure, including a The left side rod and the right side rod connected to the side and the right rear side, and the push rod connected to the rear end of the left rod and the right rod; It is clamped in the horizontal card slot provided on the rear back of the backrest. 8. The multifunctional wheelchair according to any one of claims 1-4, characterized in that right-angled armrests are hinged on both sides of the base, and when the right-angled armrests are rotated 90 degrees forward, they are in a storage state . 9. The multifunctional wheelchair according to claim 8, characterized in that, the tops of the adjustable armrests are all provided with sockets for externally connecting a table. 10. The multifunctional wheelchair according to claim 1, wherein a footrest is provided at the front end of the base.