CN208770183U

CN208770183U - A kind of multifunctional wheelchair

Info

Publication number: CN208770183U
Application number: CN201820539336.9U
Authority: CN
Inventors: 陶国民
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-04-13
Filing date: 2018-04-13
Publication date: 2019-04-23
Anticipated expiration: 2028-04-13

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

Multifunctional wheelchair

Technical Field

The utility model relates to a medical care equipment especially relates to a multi-functional wheelchair that supplies the patient that crouches for a long time in bed or can't independently move about to use.

Background

At present, to the wheelchair that long-term bed or the handicapped person designed, the function is single, only can satisfy the user and utilize partial user demands such as wheelchair removal, and can not change because of the fixed structure, move to the wheelchair in-process from the bed when the user, often need many people to lift the armful simultaneously, cause pressure for patient's family members and the nurse worker, waste time and energy and user are uncomfortable, many family members or nurse worker nurse the care simultaneously and have caused huge economic pressure for the family, consequently, it is comprehensive to need a function urgently, the structure is nimble, and reduce the multi-functional wheelchair of auxiliary staff figure.

SUMMERY OF THE UTILITY MODEL

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

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a multifunctional wheelchair comprises a base with wheels, and an adjustable lifting device 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.

The further technical scheme is as follows: the upper supporting plate of the base is provided with a sliding chute, and a pulley which is in sliding fit with the sliding chute is arranged below the lower connecting plate so as 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.

The further technical scheme is as follows: the sliding detachable connection adopts a sliding groove locking structure, and specifically comprises a pair of stop blocks arranged at the front and the back of the base respectively, two sliding grooves, two buffers and two locking blocks; the two locking blocks penetrate through the upper panel of the base and extend downwards to be connected above the unlocking frame, the unlocking frame is connected below the upper panel of the base in a sliding mode through a guide rod, and a self-locking spring which is stopped to abut against the lower side of the unlocking frame is sleeved on the guide rod; the stop block abuts against a fixed protrusion on the lower surface of a lower connecting plate of the adjustable lifting device.

The further technical scheme is as follows: the adjustable lifting device 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.

The further technical scheme is as follows: the center of the seat plate is 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.

The further technical scheme is as follows: 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;

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;

or 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;

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.

The further technical scheme is as follows: the infusion support is hinged to the left side and/or the right side of the base and is of an axial length adjusting type rod-shaped structure.

The further technical scheme is as follows: the base is connected with a stay bar frame which is of a door-shaped frame structure and comprises a left side bar and a right side bar which are connected with the left back side and the right back side of the base, and a transverse push rod which is connected with the back ends of the left side bar and the right side bar; 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.

The further technical scheme is as follows: the two sides of the base are hinged with right-angle handrails, and the right-angle handrails are in a storage state when rotating forwards for 90 degrees.

The further technical scheme is as follows: the top of the adjustable armrest is provided with a socket for connecting the table board externally.

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

Compared with the prior art beneficial effect:

the utility model discloses a multifunctional wheelchair compares in traditional wheelchair has following apparent advantage:

the utility model adopts the structure of the base and the adjustable lifting device, the height and the angle of the wheelchair main body can be adjusted, the wheelchair has wider applicability, is suitable for the bed bodies with various heights, and meets various use requirements of lying, sitting, moving, folding and the like; the wheelchair has the advantages that the wheelchair is convenient to use the wheelchair main body and the base separately due to the adoption of the sliding detachable structure, the weight is lighter, the physical expenditure of a nursing worker and the family members of a patient is reduced, and under the condition of less application in a moving working state, a plurality of wheelchair main bodies can share one base, so that the expense is reduced; because the adjustable lifting device also comprises a seat plate with a defecation through hole in the center, a front baffle plate for supporting the shank part, a front handrail for a user to lean against and a neck pillow for supporting the head, the comfort level is improved, and meanwhile, the adjustable lifting device has higher safety; because various power driving mechanisms can be adopted, manufacturers can flexibly select according to different costs and production emphasis; the base is additionally provided with a support rod frame used for pushing the wheelchair, an armrest used for supporting the elbow of a user, an external desk plate used for placing articles and a pedal used for supporting the foot, and the wheelchair has comprehensive functions, is firm and durable.

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Drawings

FIG. 1 is a view showing a folding structure of a multifunctional wheelchair according to an embodiment of the present invention;

FIG. 2 is a block diagram of the particular embodiment of the multi-function wheelchair of FIG. 1 in a deployed state (lying down);

FIG. 3 is a block diagram of a particular embodiment of the multi-function wheelchair of FIG. 1 in a deployed state (in a sitting position);

FIG. 4 is a side view of FIG. 2;

FIG. 5 is a view of a base portion of the multi-functional wheelchair of the present invention shown in FIG. 1;

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

FIG. 7 is an expanded view of the simplified support structure and drive mechanism of the adjustable lift device of FIG. 6;

FIG. 8 is a side view of FIG. 5 (with the caster in an exploded condition);

fig. 9 is a bottom perspective view of fig. 5.

Reference numerals

1 base 10 foot pedal

11 infusion support 12 stop block

13 chute 14 buffer

15 locking block 16 grab rail

17 wheel 18 self-locking spring

19 unlocking frame 111 first electric push rod

112 second electric push rod 113 third electric push rod

114 brace 115 handrail side yoke plate

116 pedal link 117 armrest lower link

2 adjustable lifting device 21 front baffle

22 front armrest 23 neck pillow

3 seat plate 31 defecation through hole

4 back support

5 lower link plate 51 upper roller

52 roller 53 transition support arm

54 transition support shaft 55 roller groove

56 coupling head 57 front lower supporting shaft

58 push shaft 59 front upper supporting shaft

6 supporting structure

61 front support rod assembly 62 rear support rod assembly

63 rear lower support shaft 64 rear upper support shaft

7 left side rod of strut frame 71

72 horizontal push rod

8 right-angle armrest 9 external table board

Detailed Description

In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways than those specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

As shown in FIG. 1, a multi-function wheelchair includes a base 1 having wheels 17, and an adjustable lifting device 2 coupled above the base 1.

As shown in fig. 2-4, the adjustable lifting device 2 comprises a seat plate 3, a backrest 4 hinged with the rear end of the seat plate 3, a lower connecting plate 5 connected with the base 1, and a supporting structure 6 hinged between the seat plate 3 and the lower connecting plate 5; the support structure 6 includes a front support bar assembly 61, a rear support bar assembly 62, the front support bar assembly 61 including a front left support bar and a front right support bar, and the rear support bar assembly 62 including a rear left support bar and a rear right support bar. The adjustable lifting device 2 further comprises a driving mechanism for driving the supporting structure 6 to rotate and/or driving the seat plate 3 to lift, and the driving mechanism generates a rotating motion or a linear motion so as to enable the parallelogram mechanism formed by the seat plate 3, the front supporting rod assembly 61, the lower connecting plate 5 and the rear supporting rod assembly 62 to be in a unfolding state or a folding state. When in the unfolding state, the multifunctional wheelchair of the utility model is in the working state, and can assist the nursing worker or the family members caring for the patient to carry out daily cleaning activities on the user. When being in the state of accomodating, the utility model discloses a multi-functional wheelchair coincide is accomodate, and the volume is minimum, can easily receive and fold in arbitrary corner, reduces the space and occupies the volume.

As shown in fig. 4 and 5, a front group of wheels 17 and a rear group of wheels 17 are symmetrically arranged below the base 1, the wheels 17 are detachably connected with the base 1 by screw threads, and the connection height can be adjusted as required by artificially increasing and decreasing the meshing amount of the screw threads. Because the utility model discloses the bed body that is suitable for is highly different, when the height of elevating gear 2 with adjustable can't satisfy operation requirement, comes the auxiliary regulation multi-functional wheelchair overall height through wheel 17 on base 1, and its height-adjusting scope is applicable to the most lathe bed of using on the market, has extensive commonality.

In embodiment 1, as shown in fig. 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 a fixed support (arranged on the lower connecting plate 5 and belonging to a part of the lower connecting plate 5) of the adjustable lifting device 2, the movable end is sleeved on the outer ring of the push shaft 58 through a coupling head 56, two ends of the push shaft 58 are respectively provided with a roller 52, the rollers 52 roll in roller grooves 55 arranged on the left front support rod and the right front support rod, the fixed support of the adjustable lifting device 2 is further provided with a transition support rotating shaft 54, two ends of the transition support rotating shaft 54 are hinged with the fixed support, transition support arms 53 which are perpendicular to the axes of the transition support rotating shaft 54 are arranged at the positions close to the two ends, the top ends of the transition support arms 53 are provided with upper rollers 51 with smaller diameters, and two ends of the push shaft 58 are respectively pivoted on. When the adjustable lifting device 2 ascends, the outer surface of the roller 52 contacts with the roller groove 55, and when the movable end of the first electric push rod 111 extends out, the roller 52 is driven to roll in the roller groove 55, so as to support the parallelogram formed by the seat plate 3, the front support rod assembly 61, the lower connecting plate 5 and the rear support rod assembly 62. When the adjustable lifting device 2 is lifted to a predetermined height (close to the maximum opening state), the roller 52 is separated from the roller slot 55, no supporting force is generated, the upper roller 51 at the top end of the transition supporting arm 53 is contacted with the two side edges of the roller slot 55 to generate the supporting force, the moment arm becomes larger, the reaction force applied to the first electric push rod 111 becomes smaller, and thus the adjustable lifting device 2 can be more stable in the opening state. Such a supporting structure has the advantages that the initial stress can be increased in the ascending process of the adjustable lifting device 2, the stroke of the electric push rod is shortened, the stress of the electric push rod is small in the maximum state, the structural stability of each component is ensured, and the service life is prolonged. The upper roller 51 is preferably constructed in a stepped shape, i.e., the diameter of both ends is smaller than that of the middle portion.

In other embodiments, the utility model discloses a multifunctional wheelchair base 1's last backup pad is equipped with spout 13, and the below of lower connecting plate 5 is equipped with the pulley with spout 13 sliding fit, constitutes the removable hookup of slip between adjustable elevating gear 2 and the base 1.

In other embodiments, as shown in fig. 5, 8 and 9, 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 stoppers 12 (a pair of front and rear stoppers), two sliding grooves 13, two buffers 14, and two locking blocks 15; the two locking blocks 15 penetrate through the upper panel (i.e. the upper surface) of the base 1 and extend downwards to be connected above the unlocking frame 19, the unlocking frame 19 is connected below the upper panel of the base 1 in a sliding way through a guide rod, and a self-locking spring 18 which is stopped against the lower part of the unlocking frame 19 is sleeved on the guide rod. The buffer 14 is internally provided with a spring for buffering and damping, so that the secondary injury to a user caused by inertia in the assembling process is reduced. The stoppers 12 are used to stop the fixing protrusions (not shown in the drawings, two groups of two are provided near the front end and two near the rear end, corresponding to the number of the stoppers 12) on the lower surface of the lower connecting plate 5 of the adjustable lifting device 2, for limiting after assembly. When the multifunctional wheelchair is used in a combined mode, the lower connecting plate 5 of the adjustable lifting device 2 is connected with the base 1 in a sliding mode along the sliding grooves 13 from the rear end of the base 1 to the front end in the horizontal direction under the limiting effect of the two sliding grooves 13, the locking block 15 is pressed downwards when the fixing protrusions on the lower surface of the lower connecting plate 5 act on the guide inclined surfaces of the locking block 15, the fixing protrusions close to the rear end cross over the uppermost end of the locking block 15, the locking block 15 automatically pops upwards through the spring force generated by the self-locking spring 18 on the unlocking frame 19, the fixing protrusions close to the rear end are arranged between the stop block 12 at the rear end and the locking block 15, and an assembly combined state is formed. The sliding groove 13 and the buffer 14 are adopted, so that labor saving and safety in the assembling process are ensured, and the stop block 12 and the locking block 15 are adopted, so that firmness and reliability in the assembling effect are ensured. When the multifunctional wheelchair with the combination is disassembled, pressure is applied to the locking block 15, the locking block 15 is pressed downwards to be flush with the upper surface of the lower connecting plate 5, the elastic force of the buffer 14 faces the opposite direction of assembly, the adjustable lifting device 2 is enabled to be detached from the locking connection with the base 1, the adjustable lifting device 2 is dragged by external force, the disassembly is completed, the disassembly process is time-saving and labor-saving due to the structure, and the operation can be completed by one person. Specifically, when the adjustable lifting device 2 is disassembled, a user treads downwards (or presses downwards by other working tools) the cross rod part of the unlocking frame 19 by feet to apply downward pressure to the unlocking frame 19, so that the spring force of the self-locking spring 18 is overcome, the locking block 15 is driven to press downwards to be flush with the upper surface of the lower connecting plate 5, the elastic force of the buffer 14 faces to the opposite assembling direction, the adjustable lifting device 2 is enabled to be unlocked and connected with the base 1 (namely, the assembled and combined state is disassembled), and the adjustable lifting device 2 is dragged by external force to complete the disassembly. This foot-operated unblock structure can alleviate split personnel's working strength, and is convenient reliable. The structure of the stopper 12 in this embodiment is an inverted L shape to form a limiting cavity for accommodating the fixing protrusion, and in the assembled state, the adjustable lifting device 2 can be prevented from being separated from the base 1 upward.

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

Or the lower connecting plate 5 is fixedly connected with an upper supporting plate arranged on the base 1 in a threaded connection mode, a welding mode and the like, and the purpose is to obtain a multifunctional wheelchair with an integrated structure and ensure the reliability and the durability of the wheelchair.

As shown in fig. 2, the adjustable lifting device 2 further includes:

the front baffle plate 21 is hinged with the front end of the seat plate 3, and when the wheelchair is in a sitting working state, the front baffle plate 21 is matched with the small leg of a user to incline so as to provide supporting force for the leg.

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

Locate the neck pillow 23 of 4 outer ends of back, neck pillow 23 can customize according to user's user demand, and fixed coupling is in 4 outer ends of back or is the integral type structure with 4 outer ends of back, or 4 outer ends of back are equipped with the slot, and neck pillow 23 lower part is equipped with the inserted column of matching and carries out the swing joint.

In other embodiments, as shown in fig. 9, the fixed end of the second electric putter 112 is fixedly connected to the support on the lower surface of the base 1, the movable end thereof is hinged to the lower handrail link 117, the lower handrail link 117 is fixedly connected to the handrail 16 through the fixedly connected handrail-side link plate 115, and the handrail-side link plate 115 is perpendicular to the handrail 16. When the grab bar 16 is in the horizontal state, it is in the contracted state, and the movable end of the second electric push rod 112 is in the extended state. In the working state, the movable end of the second electric push rod 112 is contracted, so as to drive the armrest lower link 117 to rotate, and when the armrest lower link 117 rotates, the armrest rod 16 is driven to rotate upwards through the armrest side link plate 115 which is fixedly connected, so that the armrest rod 16 is supported for supporting the elbow of the user.

According to a further technical scheme, as shown in fig. 9, a pedal link rod 116 is sleeved in the middle of the armrest lower link rod 117, one end of the pedal link rod 116 is hinged to the armrest lower link rod 117, and the other end of the pedal link rod 116 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 is contracted to drive the armrest lower link 117 to rotate, and the armrest lower link 117 rotates and simultaneously drives the pedal link 116 to rotate, so that the connected front pedal 21 rotates from the rear to the front, and the user can relieve the legs when sitting.

A further technical scheme is as shown in fig. 8, a fixed end of a third electric push rod 113 is fixedly connected to a fixed bracket of the base 1, and a movable end is hinged to a lower end of the stay rod 114, as can be seen from fig. 1 to 3, the stay rod 114 is vertically and fixedly connected with the left side rod 71 and the right side rod, when the backrest 4 is unfolded at an angle greater than 90 degrees, the third electric push rod 113 rotates, and then the stay rod 114, the left side rod 71 and the right side rod are driven to rotate and rise, when the horizontal push rod 72 contacts with the lower surface of the backrest 4, the driving mechanism stops driving, a stable state is reached, sufficient supporting force is provided for the backrest 4, and stable support of the back of a user is ensured.

The electric push rod 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 an air cylinder or an oil cylinder connected with a pressure source.

As shown in fig. 2 and 3, a defecation through hole 31 is formed in the center of the seat plate 3, and an elastic frame-shaped bracket located below the defecation through hole 31 is arranged below the seat plate 3 to elastically support the excrement container, so that the support effectiveness of the excrement container and the convenience of disassembly and assembly of the container are improved.

In other embodiments, the center of the seat plate 3 is provided with a defecation through hole 31 for the user to excrete in the wheelchair, a chute or a bracket is arranged below the seat plate 3, the chute or the bracket is positioned below the defecation through hole 31 and used for slidably connecting or supporting the excrement container, and the excrement container can be a bed pan, a disposable excretion bag or other containers according to specific requirements.

In other embodiments, the driving mechanism of the multifunctional wheelchair of the utility model is an electric motor with a speed reducing mechanism; the speed reduction mechanism is provided with an output shaft and is drivingly coupled to the rotating shaft of either the front support bar assembly 61 or the rear support bar assembly 62.

In other embodiments, the driving mechanism is a manual force applying rod for generating rotational power, a torsion coupling portion is disposed at an outer end of the rotation shaft of either the front support rod assembly 61 or the rear support rod assembly 62, and the manual force applying rod is in transmission coupling with the torsion coupling portion.

In other embodiments, the driving mechanism is a linear power mechanism disposed between the lower connecting plate 5 and any one of 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, an oil cylinder or a ball screw transmission 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 an air passage of the air bag.

In other embodiments, the driving mechanism is a magnetic mechanism disposed between the lower connecting plate 5 and the seat plate 3, the magnetic mechanism includes a lower coil fixed on the lower connecting plate 5, an upper coil fixed on the lower surface of the seat plate 3, and a driving circuit electrically connected to the upper coil and the lower coil; the upper coil and the lower coil generate the same level magnetic field, and then generate the repulsive force that the seat plate 3 rises upwards.

As shown in fig. 2-3, the left side and/or the right side of the base 1 is hinged with an infusion support 11, the infusion support 11 is an axial length adjustable rod-shaped structure, when a user needs to defecate on the multifunctional wheelchair or perform other daily cleaning work in the infusion process, the infusion support 11 is used for hanging an infusion bottle/bag after being stretched to a required height from a storage state.

In other embodiments, a brace frame 7 is coupled to the base 1, and the brace frame 7 is a door-shaped frame structure and includes a left side rod 71 and a right side rod coupled to the left rear side and the right rear side of the base 1, and a horizontal push rod 72 coupled to rear ends of the left side rod 71 and the right side rod. The support rod frame 7 is used for a worker or family members of a patient to push the wheelchair to move behind 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 in a transverse clamping groove formed in the back face of the backrest 4, upward supporting force is provided for the backrest 4, and safety of the patient in a flat lying use state such as hair washing, bathing and the like is guaranteed.

In other embodiments, the right-angle armrests 8 are hinged to two sides of the base 1, and when the right-angle armrests 8 rotate forwards by 90 degrees, the storage state is achieved. The right-angle handrail 8 is in a use state in a vertical state and is used for a user to lean against. Furthermore, the tops of the right-angle armrests 8 are provided with sockets for externally connecting the table plate 9, and when a user needs to take food, read, take a bath and the like on the multifunctional wheelchair, the externally connected table plate 9 is used for placing necessary articles and appliances.

In other embodiments, the foot pedal 10 is disposed at the front end of the base 1 for supporting feet, which is more beneficial for the people who have difficulty in defecation, such as bed, and the like, in the old or the long-term illness, and can relieve the defecation pressure.

The utility model discloses still disclose following technical scheme simultaneously:

a labor-saving short-stroke connecting rod structure can be used for lifting articles such as tables and chairs, and is particularly suitable for product structures with small space. The concrete structure is as follows: a labor-saving short-stroke connecting rod structure comprises an upper connecting plate (a seat plate in the embodiment shown in figures 1-9), a lower connecting plate and a supporting structure hinged between the upper connecting plate and the lower connecting plate; the supporting structure comprises a front supporting rod assembly and a rear supporting rod assembly; the driving mechanism generates linear motion so as to enable a parallelogram mechanism formed by the upper connecting plate, the front support rod assembly, the lower connecting plate and the rear support rod assembly to be in an unfolded state or a stored state; the front support rod assembly comprises a left front support rod and a right front support rod, and the rear support rod assembly comprises 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 to the lower connecting plate, the movable end of the electric telescopic rod is sleeved on the outer ring of the push shaft through the connecting head, two rollers are arranged at two ends of the push shaft respectively, the rollers roll in roller grooves formed in the left front supporting rod and the right front supporting rod, the lower connecting plate is further provided with a transition supporting rotating shaft, two ends of the transition supporting rotating shaft are hinged to the lower connecting plate, transition supporting arms perpendicular to the axes of the transition supporting rotating shaft are arranged at positions close to two ends of the transition supporting rotating shaft, an upper rolling shaft is arranged at the top end of each transition supporting arm, and two ends of the push shaft are further respectively. In the ascending process, the outer surface of the roller is in contact with the roller groove, and when the movable end of the electric telescopic rod extends out, the roller is driven to roll in the roller groove, so that a parallelogram formed by the upper connecting plate, the front supporting rod assembly, the lower connecting plate and the rear supporting rod assembly is supported. When the adjustable lifting device rises to a preset height (close to the maximum opening state), the roller is separated from the roller groove, no supporting force is generated, the upper roller at the top end of the transition supporting arm is contacted with the edges of the two sides of the roller groove to generate the supporting force, the force arm at the moment is increased, the reaction force borne by the first electric push rod is reduced, and therefore the adjustable lifting device can be more stable in the opening state. The supporting structure has the advantages that the initial stress can be increased in the ascending process of the adjustable lifting device, the stroke of the electric push rod is shortened, the stress of the electric push rod is small in the maximum state, the structural stability of each component is ensured, and the service life is prolonged. The upper roller is preferably in a stepped structure, i.e., the diameter of the two ends is smaller than that of the middle part.

The utility model relates to a link structure of laborsaving type short stroke can be used to multi-functional wheelchair, specifically as shown in the embodiment of fig. 1-9, also can be used to the structure of various chairs, for example student's seat, car seat etc..

The utility model also discloses a linkage connecting rod mechanism for the seat; the seat comprises a base, grab bars hinged with two sides of the base and a pedal hinged with the front end of the base; the linear driving mechanism is arranged between the base and the grab rail; the fixed end of the linear driving mechanism is fixedly connected with a bracket of the base, the movable end of the linear driving mechanism is hinged with a lower handrail connecting rod, and the lower handrail connecting rod is fixedly connected with a handrail rod through a handrail side connecting plate which is fixedly connected; when the grab bar is in a horizontal state, the grab bar is in a contraction state, and the movable end of the linear driving mechanism is in an extension state; under the working state, the movable end of the linear driving mechanism contracts so as to drive the lower handrail connecting rod to rotate, and when the lower handrail connecting rod rotates, the handrail rod is driven to rotate upwards through the handrail side connecting plate which is fixedly connected with the lower handrail connecting rod, and the handrail rod is supported to support the elbow of a user.

The further technical scheme is as follows: the middle part of the lower link rod of the armrest is sleeved with a pedal link rod, one end of the pedal link rod is hinged with the lower link rod of the armrest, and the other end of the pedal link rod is hinged with the middle part below the front pedal; under the working state, the movable end of the linear driving mechanism contracts so as to drive the lower handrail connecting rod to rotate, and the lower handrail connecting rod drives the pedal connecting rod to rotate while rotating, so that the connected front pedal rotates from the rear to the front, and a user can relieve legs when sitting.

The linkage link mechanism for a chair of the present invention can be used in a multi-functional wheelchair, as shown in the embodiments of fig. 1 to 9, and can also be used in the structure of various chairs, such as a folding chair, a car seat, etc.

To sum up, the multifunctional wheelchair of the utility model adopts the structure of the matching of the base and the adjustable lifting device, so that the height and the angle of the wheelchair main body can be adjusted, the multifunctional wheelchair has wider applicability, is suitable for machine beds with various heights, and meets various use requirements such as lying, sitting, moving, folding and the like; the wheelchair has the advantages that the wheelchair is convenient to use the wheelchair main body and the base separately due to the adoption of the sliding detachable structure, the weight is lighter, the physical expenditure of a nursing worker and the family members of a patient is reduced, and under the condition of less application in a moving working state, a plurality of wheelchair main bodies can share one base, so that the expense is reduced; because the adjustable lifting device also comprises a seat plate with a defecation through hole in the center, a front baffle plate for supporting the shank part, a front handrail for a user to lean against and a neck pillow for supporting the head, the comfort level is improved, and meanwhile, the adjustable lifting device has higher safety; because various power driving mechanisms can be adopted, manufacturers can flexibly select according to different costs and production emphasis; the base is additionally provided with a support rod frame used for pushing the wheelchair, an armrest used for supporting the elbow of a user, an external desk plate used for placing articles and a pedal used for supporting the foot, and the wheelchair has comprehensive functions, is firm and durable.

The technical content of the present invention is further described by way of example only for the purpose of understanding, but the present invention is not limited thereto, and any technical extension or re-creation according to the present invention is protected by the present invention. The protection scope of the present invention is subject to the claims.

Claims

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 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.