CN113940819B

CN113940819B - Wheelchair capable of being used as nursing bed

Info

Publication number: CN113940819B
Application number: CN202111426110.0A
Authority: CN
Inventors: 崔嬿嬿; 周芮伊; 白黎
Original assignee: First Affiliated Hospital of Zhengzhou University
Current assignee: First Affiliated Hospital of Zhengzhou University
Priority date: 2021-11-27
Filing date: 2021-11-27
Publication date: 2023-08-18
Anticipated expiration: 2041-11-27
Also published as: CN113940819A

Abstract

The invention provides a wheelchair capable of being used as a nursing bed, which comprises a chair frame and a sitting and lying assembly, wherein the sitting and lying assembly comprises a buttock sitting piece, a backrest, armrests and leg leaning pieces which are hinged with each other; the chair frame is provided with a lifting mechanism for driving the hip seat part to lift and drive the backrest and the armrests to slide and rotate on the chair frame, and the hip seat part and/or the chair frame are connected with the leg rest parts through the stretching mechanism, so that the sitting and lying assembly is stretched or contracted to switch between sitting and sliding states. The invention can conveniently switch between sitting or sliding states, so that a patient can freely switch from sitting to lying, the help of other people is not needed, the bed frame is not needed, and the splicing work by aligning the bed frame is avoided; the whole body is lifted up by the lifting mechanism to approach the normal bed height, so that nursing work is facilitated; the side edges of the armrests, the backrest and the leg rest are unfolded, so that the lying area is increased, the space limitation is avoided, and the lying comfort level is increased.

Description

Wheelchair capable of being used as nursing bed

Technical Field

The invention relates to the field of nursing instruments, in particular to a wheelchair capable of being used as a nursing bed.

Background

Along with the progress of science and technology, in order to enable patients with paralysis of lower limbs to conveniently switch between sitting and lying, a plurality of wheelchairs with the function of lying down have been developed. However, the wheelchair in the prior art can only put the backrest down by a certain angle, the patient cannot lie flat completely, and the wheelchair has limited width and low comfort and is far from lying on the bed. The wheelchair that another part can put down the back of the chair completely and lie flat needs to combine with the bedstead, just can stable place, realizes the function of bed to this kind of structure that bed chair combines, at the in-process that combines, need aim at just can combine, and then need other people to assist and just can operate, still bring very big inconvenience for the patient.

Disclosure of Invention

Aiming at the technical problems, the invention provides a wheelchair capable of being used as a nursing bed, which is used for solving the problem that the wheelchair bed in the prior art can realize the function of the bed by combining a bedstead.

In order to achieve the above purpose, the technical scheme of the invention is realized as follows:

a wheelchair capable of being used as a nursing bed comprises a chair frame and a sitting and lying assembly movably connected to the chair frame, wherein the sitting and lying assembly comprises a buttock sitting piece, a backrest, armrests and leg leaning pieces which are hinged with each other, the buttock sitting piece is connected to the chair frame in a lifting manner, and the backrest and the armrests are both connected with the chair frame in a sliding and hinging manner through sliding hinging seats; the chair frame is provided with a lifting mechanism for driving the hip seat part to lift and driving the backrest and the armrests to slide and rotate on the chair frame, and the hip seat part and/or the chair frame are connected with the leg rest parts through a stretching mechanism, so that the sitting and lying assembly is stretched or contracted to switch between sitting and sliding states; the chair frame is provided with a locking mechanism for locking the backrest; the backrest is hinged with supporting legs for supporting the backrest.

Preferably, the chair frame is provided with a cross beam for supporting the backrest after the backrest is placed flat, the locking mechanism comprises a lock seat fixed in the cross beam and a sliding piece vertically connected to the lock seat in a sliding mode, the sliding piece is sleeved with a spring and a sliding locking sleeve, the spring is clamped between the sleeve and the lock seat, and the upper end of the sliding piece is provided with a limiting piece for limiting the locking sleeve so that the locking sleeve slides downwards along with the sliding piece; the locking sleeve is hinged with a lock hook, the lock seat is provided with a pin shaft for driving the lock hook to swing and hooking or releasing the backrest, the lock hook is provided with an arc perforation for the pin shaft to pass through, and the arc perforation is in sliding fit with the pin shaft; the cross beam is provided with a locking driving assembly for driving the sliding piece to slide up and down; the locking driving assembly comprises a wedge block which is transversely matched with the sliding piece in a sliding way and a telescopic driving piece which drives the wedge block to move, a transverse through hole is formed in the sliding piece, and a wedge surface of the wedge block is in sliding fit with the lower bottom surface of the transverse through hole.

Preferably, the handrail is hinged with a side baffle; the telescopic pushing mechanism is connected between the handrail sliding hinging seat and the side blocking piece, and is used for driving the side blocking piece to rotate to be vertical when the handrail is laid down and driving the side blocking piece to fold with the handrail in the process that the handrail rotates to be vertical.

Preferably, the telescopic pushing mechanism comprises a sliding rod hinged with the side baffle piece and a sliding sleeve hinged with the armrest sliding hinge seat, and the sliding sleeve is arranged on the sliding rod in a sliding manner; the sliding sleeve is internally provided with a sliding ring which is in sliding fit with the sliding rod, and one end of the sliding rod, which is close to the armrest sliding hinge seat, is provided with a limited slip stop protrusion which can be in butt joint with the sliding ring, so that the armrest sliding hinge seat can rotate to be vertical by pulling the side baffle piece through the telescopic pushing mechanism.

Preferably, the sliding rod is provided with an elastic bulge, and the elastic bulge is arranged close to the anti-slip bulge; when the sliding sleeve slides far away from the side baffle, under the action of the tensile force generated by sliding of the handrail sliding hinge seat, the sliding ring extrudes the elastic bulge and is positioned between the elastic bulge and the anti-slip bulge, so that the sliding sleeve can conveniently pull the sliding rod through the anti-slip bulge, and the side baffle is pulled to rotate vertically; the elastic force of the elastic bulge is larger than the pushing force of the opposite side blocking piece, and when the sliding sleeve slides towards the side blocking piece, the sliding sleeve pushes the side blocking piece to be quickly folded with the handrail through the elastic bulge, so that the side blocking piece is prevented from affecting a patient; after the side blocking pieces are folded, the sliding sleeve is in sliding action of the armrest sliding hinging seat, and the sliding ring extrudes the elastic bulge to slide to be close to the side blocking pieces.

Preferably, the two sides of the backrest are also hinged with backrest side edges so as to increase the area of the backrest after being laid flat, and the backrest is provided with a flattening driving piece for driving the backrest side edges to rotate around a hinge point; leg rest sides are hinged to two sides of the leg rest, so that the area of the leg rest is conveniently increased, and a leg flattening driving piece for driving the leg rest sides to rotate around a hinge point is arranged on the leg rest.

Preferably, the flattening driving piece comprises a pushing sleeve in sliding connection with the backrest, a screw rod in rotating connection with the backrest and a driving piece for driving the screw rod to rotate, one end of the pushing sleeve is in threaded connection with the screw rod, the other end of the pushing sleeve is in hinged connection with the side edge of the backrest through a hinge block, and a limiting part for limiting the moving direction of the pushing sleeve is arranged in the backrest; the hinge block is provided with a hinge hole for the hinge shaft to pass through, and the hinge hole is in clearance fit with the hinge shaft to avoid blocking; the driving piece is a double-shaft motor or comprises a rotating motor, a gear connected to the output end of the rotating motor and a screw rod gear meshed with the gear and fixedly connected to the screw rod.

Preferably, the backrest is provided with a supporting leg driving piece for pushing the supporting legs to rotate from being attached to the backrest to be perpendicular to the backrest, the supporting leg driving piece is an electric push rod, and the electric push rod pushes the supporting legs to rotate through a push rod; the backrest is provided with a limiting piece for limiting the supporting legs.

Preferably, the lifting mechanism comprises a lifting screw rod rotatably connected to the chair frame, and the lifting screw rod is vertically arranged; the lifting screw rod is connected with a sliding block in a threaded manner, and the sliding block is connected with the hip seat piece; the lower end of the lifting screw rod is connected with a bevel gear; the lifting mechanism further comprises a driving rod which is transversely and rotatably connected to the chair frame and a driving rod rotation driving piece which drives the driving rod to rotate; the end part of the driving rod is provided with a driving bevel gear which is meshed with the bevel gear to drive the lifting screw rod to rotate.

Preferably, the chair frame is also provided with a ground supporting mechanism for supporting the ground after the wheelchair is flattened, the ground supporting mechanism comprises a ground supporting sleeve vertically arranged at the bottom of the chair frame and a ground supporting block vertically arranged in the ground supporting sleeve in a sliding manner, the upper end of the ground supporting block is connected with a ground supporting threaded rod, the ground supporting sleeve is rotationally connected with a threaded sleeve, and the threaded sleeve is in threaded fit with the ground supporting threaded rod; the upper end of the threaded sleeve is connected with a threaded sleeve bevel gear, and the driving rod is provided with a threaded sleeve driving bevel gear which is meshed with the threaded sleeve bevel gear to drive the threaded sleeve to rotate, so that the ground supporting block is driven to descend and tightly support the ground.

The invention has the beneficial effects that:

1. the backrest and the armrests are driven to slide on the chair frame by lifting the hip seat part and simultaneously rotate, so that the sitting and lying assembly is unfolded or contracted to conveniently switch between sitting or lying states, a patient can freely switch from the sitting state to the lying state, the assistance of other people is not needed, the bedstead is not needed, and the splicing work by aiming at the bedstead is avoided;

2. the whole sitting and lying assembly is lifted through the lifting mechanism, compared with the wheelchair in the prior art, the wheelchair is unfolded, the wheelchair is closer to the height of a normal bed, nursing work of nursing staff is facilitated, linkage is realized by unfolding and lifting only through the lifting mechanism, and the wheelchair is ingenious in combination and saves time and labor;

3. the armrests are unfolded on the two sides of the hip seat, so that the area for lying is increased, the space limitation is avoided, and the comfort level after lying is increased;

4. the backrest is fixed and supported after being placed flat by the locking mechanism for locking the backrest, so that a certain supporting effect is achieved, and the stability of the sitting and lying assembly after being unfolded can be ensured;

5. the backrest is hinged with supporting legs for supporting the backrest, and the supporting backrest keeps the stable placement of the whole wheelchair in a bed state after the sitting and lying assembly is unfolded;

6. through set up the side fender piece on the handrail, be used for promoting the side fender piece to rotate into vertically when the handrail is put to flexible pushing mechanism, play the effect of side fender and avoid the disease to fall down the wheelchair to drive side fender piece and handrail immediately and fold at the handrail rotation in-process of standing, avoid hindering the normal use of wheelchair

7. The two sides of the backrest and the leg rest are hinged with the side edges, so that the area of the backrest and the leg rest after being unfolded and flattened is conveniently increased, the area of the backrest and the leg rest which can lie is further increased, and the comfort level of a patient lying down is higher.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic diagram of the structure of the present invention after being flattened;

FIG. 3 is a schematic cross-sectional view of A-A of FIG. 1;

FIG. 4 is a schematic cross-sectional view of D-D in FIG. 2;

FIG. 5 is an enlarged view of part of B in FIG. 4;

FIG. 6 is an enlarged view of a portion of C in FIG. 3;

FIG. 7 is a schematic cross-sectional structure of F-F in FIG. 2;

FIG. 8 is an enlarged view of a portion of E in FIG. 7;

FIG. 9 is a schematic diagram of a lock base according to the present invention;

FIG. 10 is a schematic view of the locking sleeve of the present invention;

fig. 11 is a schematic cross-sectional structure of G-G in fig. 2.

FIG. 12 is an enlarged view of a portion of H in FIG. 3;

FIG. 13 is an enlarged view of a portion of K of FIG. 2;

fig. 14 is a schematic structural view of embodiment 6 of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 to 13, the wheelchair capable of being used as a nursing bed according to the embodiment of the invention comprises a chair frame 1 and a sitting and lying assembly movably connected to the chair frame 1, wherein the sitting and lying assembly comprises a hip seat 2, a backrest 3, an armrest 4 and a leg rest 5 which are hinged with each other, the backrest 3, the armrest 4 and the leg rest 5 are respectively hinged on corresponding positions of the hip seat 2, the hip seat 2 is connected to the chair frame 1 in a lifting manner, and the backrest 3 and the armrest 4 are both in sliding and hinged connection with the chair frame 1 through sliding hinged seats; the chair frame 1 is provided with a lifting mechanism 12 for driving the hip seat 2 to lift; the chair frame 1 is provided with buttons for controlling various electric driving parts of the wheelchair, the bottom of the chair frame 1 is provided with rechargeable batteries for supplying power to the electric driving parts, the button controls the lifting mechanism 12 to drive the lifting of the hip seat 2 to drive the backrest 3 and the armrests 4 to simultaneously rotate on the chair frame 1, so that the backrest 3, the armrests 4 and the hip seat 2 are flattened or contracted, and the hip seat 2 and/or the chair frame 1 are connected with the leg rest 5 through a spreading mechanism, so that the sitting and lying assembly is spread or contracted to conveniently switch between sitting or lying states, the patient can freely switch from the sitting state to the lying state, the help of other people is not needed, the bedstead is not needed, and the splicing work by aligning the bedstead is avoided; the armrests 4 are unfolded on the two sides of the hip seat 2, so that the area for lying is increased, the space limitation is avoided, and the comfort level after lying is increased; the chair frame 1 is provided with a locking mechanism 6 for locking the backrest 3, and the locking mechanism is used for fixing and supporting the backrest 3 after the backrest 3 is put flat, so that a certain supporting effect is achieved, and the stability of the sitting and lying assembly after being unfolded can be ensured; in addition, the backrest 3 is hinged with support legs 10 for supporting the backrest 3, and the backrest 3 is supported to maintain stable placement of the whole wheelchair in a bed state after the sitting and lying assembly is unfolded.

Preferably, as shown in fig. 7 to 10, the seat frame 1 is provided with a cross beam 101 for supporting the backrest 3 after the backrest 3 is placed flat, the locking mechanism 6 comprises a lock seat 64 fixed in the cross beam 101 and a sliding piece 61 vertically connected to the lock seat 64 in a sliding manner, a vertical slideway for sliding the sliding piece 61 is arranged at the lower part of the lock seat 64, and a larger accommodating space is arranged at the upper part of the lock seat; the sliding member 61 is sleeved with a spring 69 and a sliding locking sleeve 62, the spring 69 and the locking sleeve 62 are located in the accommodating space, the locking sleeve 62 is located above the spring 69, a spring space for accommodating the spring 69 is arranged at the lower part of the locking sleeve 62, the spring 69 is clamped between the top surface of the spring space of the locking sleeve 62 and the bottom surface of the accommodating space between the locking seat 64, and the upper end of the sliding member 61 is provided with a limiting member 67 for limiting the locking sleeve 62 so that the locking sleeve 62 slides downwards along with the sliding member 61, and in the embodiment, the limiting member 67 is a nut in threaded connection with the sliding member 61; the locking sleeve 62 is hinged with a locking hook 63, and a locking part which can be hooked by the locking hook 63 is arranged at a corresponding position of the backrest 3; the lock seat 64 is provided with a pin 65 which drives the lock hook 63 to swing and is used for hooking the backrest 3 or releasing the backrest 3; in this embodiment, lock hooks 63 are symmetrically hinged on the lock sleeve 62, symmetrical pin shafts 65 are arranged at corresponding positions on the lock base 64, and the pin shafts 65 penetrate through the lock hooks 63; the latch hook 63 is provided with an arc-shaped perforation 66 for the pin shaft 65 to pass through, and the arc-shaped perforation 66 is in sliding fit with the pin shaft 65; the cross beam 101 is provided with a locking driving assembly for driving the sliding piece 61 to slide up and down; the locking driving assembly comprises a wedge block 68 which is transversely matched with the sliding piece 61 in a sliding way and a telescopic driving piece which drives the wedge block 68 to move, a transverse through hole is arranged in the sliding piece 61, and the wedge surface of the wedge block 68 is in sliding fit with the lower bottom surface of the transverse through hole; when the wedge block 68 moves close to the sliding member 61, the sliding member 61 slides down and drives the locking sleeve 62 to slide down, so that the spring 69 is compressed on one hand, the locking hook 63 swings on the other hand, and the locking part on the backrest 3 is released; when the sliding piece 61 moves away from the sliding piece 61, the sliding piece 61 slides upwards under the action of a spring and drives the locking sleeve 62 to slide upwards, so that the two locking hooks 63 rotate outwards to lock the locking part on the backrest 3; in this embodiment, the locking portion is a groove corresponding to the position of the locking mechanism 6 on the back of the backrest 3, the mouth of the groove is provided with a transverse opening edge, and the locking hook 63 buckles the opening edge, so as to achieve the purpose of locking. In addition, a backrest sliding groove for sliding the sliding hinge seat of the backrest 3 is arranged at the lower part of the backrest 3.

Preferably, as shown in fig. 3 to 6, the armrest 4 is hinged with a side blocking member 7, the side blocking member 7 is in a shape like a Chinese character 'zhi', the side blocking member 7 is embedded in the upper portion of the armrest 4, a receiving groove for receiving the side blocking member 7 and allowing the side blocking member 7 to rotate around a hinge point is arranged at a corresponding position of the armrest 4, and when the wheelchair is in a sitting state, the side blocking member 7 can be folded in the receiving groove, and can also be opened to be perpendicular to the armrest 7 when the wheelchair is unfolded into a bed; a telescopic pushing mechanism 8 is connected between the armrest sliding hinging seat which is in sliding fit with the armrests 4 and the side blocking piece 7 and is used for pushing the side blocking piece 7 to rotate to be vertical when the armrests 4 are laid down, so that the side blocking function is achieved, and the patient is prevented from falling down the wheelchair; and the side baffle 7 is driven to fold with the armrest 4 in the process of the armrest 4 rotating to be erected, so that the normal use of the wheelchair is prevented from being hindered. The armrest 4 is provided with a hinging seat chute for sliding the armrest sliding hinging seat, the chute is communicated with the lower end of the accommodating groove, and the telescopic pushing mechanism 8 is positioned in the chute and does not prevent the armrest sliding hinging seat from sliding in the hinging seat chute.

Preferably, as shown in fig. 5 and 6, the telescopic pushing mechanism 8 comprises a sliding rod 81 hinged with the side baffle 7 and a sliding sleeve 82 hinged with the sliding hinge seat of the handrail, and the sliding sleeve 82 is sleeved on the sliding rod 81 in a sliding way; a sliding ring 821 in sliding fit with the sliding rod 81 is arranged in the end, close to the side baffle 7, of the sliding sleeve 82, and a sliding stop protrusion 83 which can be limited by being in butt joint with the sliding ring 821 is arranged at the end, close to the handrail sliding hinge seat 82, of the sliding rod 81, so that the handrail sliding hinge seat pulls the side baffle 7 to rotate to be vertical through the telescopic pushing mechanism 8.

Specifically, as shown in fig. 5 and 6, the sliding rod 81 is provided with an elastic protrusion 84, the elastic protrusion 84 is disposed near the anti-slip protrusion 83, in this embodiment, the elastic protrusion 84 includes a protrusion with two cambered surfaces or inclined surfaces on two sides, and the protrusion is connected with the inner wall of the sliding rod 81 through a spring; when the sitting and lying assembly is unfolded, the sliding sleeve 82 slides away from the side baffle 7, and under the action of the pulling force generated by sliding of the armrest sliding hinge seat, the sliding ring 821 presses the elastic bulge 84 and then is positioned between the elastic bulge 84 and the anti-sliding bulge 83, so that the sliding sleeve 82 can conveniently pull the sliding rod 81 through the anti-sliding bulge 83, and the side baffle 7 is pulled to rotate vertically; the elastic force of the elastic bulge 84 is larger than the pushing force of the opposite side baffle 7, when the sitting and lying assembly is contracted to be in a sitting state, the sliding sleeve 82 slides towards the side baffle 7, and at the first time, the sliding sleeve 82 immediately pushes the side baffle 7 to be quickly folded with the handrail 4 through the elastic bulge 84, so that the side baffle 7 is prevented from extending out to influence a patient; after the side blocking piece 7 is folded, the sliding sleeve 82 slides under the action of the sliding hinge seat of the handrail, and the side blocking piece 7 slides close to the side blocking piece 7 under the blocking action of the containing groove after the sliding ring 821 presses the elastic bulge 84.

Preferably, as shown in fig. 11, the two sides of the backrest 3 are further hinged with backrest side edges 31, so as to increase the area of the backrest 3 after being flattened, and the backrest 3 is provided with a flattening driving piece 9 for driving the backrest side edges 31 to rotate around the hinge point; leg rest sides 51 are hinged to the two sides of the leg rest, so that the area of the leg rest 5 is conveniently increased, and a leg flattening driving part for driving the leg rest sides 51 to rotate around a hinge point is arranged on the leg rest 5.

Preferably, as shown in fig. 1 and 2, the backrest 3 is provided with a leg driving member for pushing the supporting leg 10 to rotate from being attached to the backrest 3 to be perpendicular to the backrest 3, the leg driving member is an electric push rod, and the electric push rod pushes the supporting leg 10 to rotate through a push rod 11; the backrest 3 is provided with a limiting piece for limiting the supporting leg 10, so that the supporting leg 10 is prevented from rotating beyond limit.

Preferably, as shown in fig. 3, the lifting mechanism 12 includes lifting screw rods 121 rotatably connected to both sides of the chair frame 1, and the lifting screw rods 121 are vertically arranged; the lifting screw rod 121 is in threaded connection with a sliding block 122, and the sliding block 122 is connected with the hip seat 2; the lower end of the lifting screw rod 121 is connected with a bevel gear 123; the lifting mechanism 12 further comprises a driving rod 124 which is transversely and rotatably connected to the chair frame 1 and a driving rod rotation driving member which drives the driving rod 124 to rotate; the end of the driving rod 124 is provided with a driving bevel gear 125 which is meshed with the bevel gear 123 to drive the lifting screw 121 to rotate. In this embodiment, the driving lever rotation driving member includes a rotation motor fixed on the chair frame 1, a gear connected to an output end of the rotation motor, and a driving lever gear engaged with the gear, and the driving lever gear is fixedly connected to the driving lever 124. In this embodiment, two sliding blocks 122 are respectively disposed on two sides of the lower portion of the hip seat 2, two driving rods 124 and two driving rod rotation driving members are disposed on the seat frame 1, each driving rod rotation driving member is matched with one driving rod 124, and two sliding blocks 122 are respectively driven to lift by two ends of one driving rod 124.

Embodiment 2 differs from embodiment 1 in that, as shown in fig. 3 and 12, the chair frame 1 is further provided with a ground support mechanism 13 for supporting the ground after the wheelchair is flattened, the ground support mechanism 13 comprises a ground support sleeve 133 vertically arranged at the bottom of the chair frame 1 and a ground support block 131 vertically and slidably arranged in the ground support sleeve 133, a friction block is arranged at the bottom surface of the ground support block 131, and the friction force between the ground support block 131 and the ground is increased; the upper end of the limiting land support block 131 is connected with a vertical land support threaded rod 132, the land support sleeve 133 is rotationally connected with a threaded sleeve 134, and the threaded sleeve 134 is in threaded fit with the land support threaded rod 132; the ground support threaded rod 132 is provided with a ground support sliding block 137 which is in sliding fit with the ground support sleeve 133, a limit bar which limits the ground support block 131 to only vertically slide and not rotate is arranged in the ground support sleeve 133, and the ground support sliding block 137 is provided with a groove which is matched with the limit bar; the upper end of the threaded sleeve 134 is connected with a threaded sleeve bevel gear 135, and the driving rod 124 is provided with a threaded sleeve driving bevel gear 136 which is meshed and connected with the threaded sleeve bevel gear 135 to drive the threaded sleeve 134 to rotate, so that the ground supporting block 131 is driven to descend to tightly support the ground, and the placement stability of the wheelchair after being unfolded is maintained. The floor support mechanism 13 is driven to work by the driving of the lifting mechanism 12, so that the functions of energy conservation and emission reduction are achieved, and the stability of the wheelchair after being unfolded into a bed is further ensured by the auxiliary function of the floor support mechanism 13.

Embodiment 3 differs from embodiment 1 in that, as shown in fig. 11, the flattening driving member 9 includes a pushing sleeve 91 slidably connected in the backrest 3, a screw 92 rotatably connected in the backrest 3, and a driving member for driving the screw 92 to rotate, wherein one end of the pushing sleeve 91 is in threaded connection with the screw 92, and the other end is hinged with the backrest side 31 through a hinge block 93. Since the backrest sides 31 are symmetrically arranged at two sides of the backrest 3, in this embodiment, a symmetrical pushing sleeve 91, a screw 92 and a hinge block 93 are arranged in the backrest 3 for respectively driving the backrest sides 31 at two sides to expand and contract towards the backrest 3; a limiting part for limiting the movement direction of the pushing sleeve 91 and preventing the pushing sleeve 91 from rotating is arranged in the backrest 3, the limiting part can be a limiting block or a limiting groove, and the pushing sleeve 91 is provided with a corresponding structure matched with the limiting block or the limiting groove; the hinge block 93 is provided with a hinge hole for the hinge shaft to pass through, and the hinge hole and the hinge shaft are in clearance fit to avoid blocking. In this embodiment, the driving member is a biaxial motor. In other embodiments, the driving member includes a rotary motor fixed on the back of the backrest 3, a gear connected to the output end of the rotary motor, and a screw gear meshed with the gear, where the screw gear is fixedly connected to the screw 92. The leg flattening drive adopts the same structure as the flattening drive 9.

Embodiment 4, as shown in fig. 13, is different from embodiment 1 in that the spreading mechanism 14 includes a spreading pushing block 141 slidably connected to the front end of the hip seat 2, a spreading screw rod 142 screwed to the spreading pushing block 141, and a spreading motor 143 driving the spreading screw rod 142 to rotate, the spreading pushing block 141 is disposed towards the leg rest 5, the front end of the spreading pushing block 141 is a cambered surface, and the spreading pushing block 141 is slid forward along with the rotation of the screw rod 142, so that the leg rest 5 is jacked up to keep the hip seat 2 flat. The hip seat 2 is provided with a limit bar which limits the spreading pushing block 141 to only transversely slide and not rotate, and the spreading pushing block 141 is provided with a groove matched with the limit bar

Embodiment 5 is different from embodiment 4 in that the spreading mechanism includes a spreading electric push rod disposed at the front end of the hip seat 2 and a spreading pushing block disposed at the front end of the spreading electric push rod.

Embodiment 6, which is different from embodiment 1 in that the spreading mechanism includes a spreading rod 144, a first sliding column 145 disposed at the bottom of the chair frame 1, and a second sliding column 146 disposed at the bottom of the hip seat 2, one end of the spreading rod 144 is hinged to and slidingly engaged with the leg rest 5 through a leg rest sliding hinge seat, and a leg rest chute for sliding the leg rest sliding hinge seat is disposed on the back of the leg rest 5; the other end of the opening rod 144 is provided with a first oblong hole for the first sliding column 145 to pass through and be in sliding fit with the first sliding column 145, and the middle part of the opening rod 144 is provided with a second oblong hole for the second sliding column 146 to pass through and be in sliding fit with the second sliding column 146. The hip seat 2 drives the sliding column II 146 to move up and down to drive the opening rod 144 to swing, and simultaneously the leg rest sliding hinging seat is matched with the sliding of the leg rest sliding groove, and the opening rod 144 opens the leg rest 5 into a flattened or pulled-down state.

The above-mentioned rotary connection is made by means of bearing.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. The wheelchair capable of being used as a nursing bed is characterized by comprising a chair frame (1) and a sitting and lying assembly movably connected to the chair frame (1), wherein the sitting and lying assembly comprises a buttock sitting piece (2), a backrest (3), armrests (4) and leg leaning pieces (5) which are hinged with each other, the buttock sitting piece (2) is connected to the chair frame (1) in a lifting manner, and the backrest (3) and the armrests (4) are both connected with the chair frame (1) in a sliding and hinging manner through sliding hinging seats; the chair frame (1) is provided with a lifting mechanism (12) for driving the hip seat (2) to lift and driving the backrest (3) and the armrests (4) to slide and rotate on the chair frame (1), and the hip seat (2) and/or the chair frame (1) are connected with the leg rest (5) through a supporting mechanism (14) so that the sitting and lying assembly is unfolded or contracted to switch between sitting and lying states; a locking mechanism (6) for locking the backrest (3) is arranged on the chair frame (1); the backrest (3) is hinged with a supporting leg (10) for supporting the backrest (3); the chair comprises a chair frame (1), wherein a cross beam (101) for supporting a backrest (3) after the backrest (3) is placed flat is arranged on the chair frame (1), a locking mechanism (6) comprises a lock seat (64) fixed in the cross beam (101) and a sliding piece (61) vertically connected to the lock seat (64) in a sliding mode, a spring (69) and a sliding locking sleeve (62) are sleeved on the sliding piece (61), the spring (69) is clamped between the locking sleeve (62) and the lock seat (64), and a limiting piece (67) for limiting the locking sleeve (62) is arranged at the upper end of the sliding piece (61) so that the locking sleeve (62) can slide downwards along with the sliding piece (61); the locking sleeve (62) is hinged with a lock hook (63), the lock seat (64) is provided with a pin shaft (65) for driving the lock hook (63) to swing and be used for hooking the backrest (3) or releasing the backrest (3), the lock hook (63) is provided with an arc-shaped through hole (66) for the pin shaft (65) to pass through, and the arc-shaped through hole (66) is in sliding fit with the pin shaft (65); the cross beam (101) is provided with a locking driving assembly for driving the sliding piece (61) to slide up and down; the locking driving assembly comprises a wedge block (68) which is transversely matched with the sliding piece (61) in a sliding mode and a telescopic driving piece which drives the wedge block (68) to move, a transverse through hole is formed in the sliding piece (61), and the wedge surface of the wedge block (68) is in sliding fit with the lower bottom surface of the transverse through hole.

2. Wheelchair usable as a care bed according to claim 1, characterized in that the armrest (4) is hinged with a side stop (7); the telescopic pushing mechanism (8) is connected between the handrail sliding hinging seat which is in sliding fit with the handrail (4) and the side blocking piece (7) and is used for driving the side blocking piece (7) to rotate to be vertical when the handrail (4) is laid down and driving the side blocking piece (7) to fold with the handrail (4) in the process that the handrail (4) rotates to be erected.

3. Wheelchair usable as a care bed according to claim 2, characterized in that the telescopic pushing mechanism (8) comprises a sliding rod (81) hinged to the side stop (7) and a sliding sleeve (82) hinged to the armrest sliding hinge seat, the sliding sleeve (82) being slidably fitted over the sliding rod (81); the sliding sleeve (82) is internally provided with a sliding ring (821) which is in sliding fit with the sliding rod (81), and one end, close to the handrail sliding hinging seat, of the sliding rod (81) is provided with a sliding stop protrusion (83) which can be limited by being in butt joint with the sliding ring (821), so that the handrail sliding hinging seat pulls the side baffle (7) to rotate to be vertical through the telescopic pushing mechanism (8).

4. A wheelchair usable as a care bed according to claim 3, characterized in that the slide bar (81) is provided with an elastic projection (84), the elastic projection (84) being arranged close to the anti-slip projection (83); when the sliding sleeve (82) slides far away from the side baffle (7), under the action of the pulling force generated by sliding of the handrail sliding hinging seat, the sliding ring (821) extrudes the elastic bulge (84) and is positioned between the elastic bulge (84) and the anti-slip bulge (83), so that the sliding sleeve (82) can conveniently pull the sliding rod (81) through the anti-slip bulge (83), and the side baffle (7) is pulled to rotate vertically; the elastic force of the elastic bulge (84) is larger than the pushing force of the side baffle (7), when the sliding sleeve (82) slides towards the side baffle (7), the sliding sleeve (82) pushes the side baffle (7) to be quickly folded with the handrail (4) through the elastic bulge (84), so that the side baffle (7) is prevented from affecting a patient; after the side blocking piece (7) is folded, the sliding sleeve (82) slides under the action of the sliding hinge seat of the handrail, and the sliding ring (821) extrudes the elastic bulge (84) to slide close to the side blocking piece (7).

5. The wheelchair capable of being used as a nursing bed according to any one of claims 1 to 4, characterized in that the two sides of the backrest (3) are hinged with backrest side edges (31) so as to increase the area of the backrest (3) after being put flat, and the backrest (3) is provided with a flattening driving piece (9) for driving the backrest side edges (31) to rotate around a hinge point; leg rest side edges (51) are hinged to two sides of the leg rest, so that the area of the leg rest (5) is conveniently increased, and leg rest side edges (51) are driven to rotate around a hinge point to flatten a driving piece.

6. Wheelchair according to claim 5, characterized in that the flattening drive (9) comprises a push sleeve (91) slidingly connected in the backrest (3), a screw (92) rotatably connected in the backrest (3) and a drive member for driving the screw (92) to rotate, one end of the push sleeve (91) is in threaded connection with the screw (92) and the other end is in hinged connection with the backrest side (31) through a hinge block (93), and a limit part for limiting the movement direction of the push sleeve (91) is arranged in the backrest (3); the hinge block (93) is provided with a hinge hole for the hinge shaft to pass through, and the hinge hole is in clearance fit with the hinge shaft to avoid blocking; the driving piece is a double-shaft motor; or the driving piece comprises a rotating motor, a gear connected to the output end of the rotating motor and a screw rod gear meshed with the gear, and the screw rod gear is fixedly connected to the screw rod (92).

7. The wheelchair capable of being used as a nursing bed according to any one of claims 1-4 or 6, characterized in that the backrest (3) is provided with a leg driving piece for pushing the supporting leg (10) to rotate from being attached to the backrest (3) to being perpendicular to the backrest (3), the leg driving piece is an electric push rod, and the electric push rod pushes the supporting leg (10) to rotate through a pushing rod (11); the backrest (3) is provided with a limiting piece for limiting the supporting leg (10).

8. Wheelchair according to any one of claims 1-4 or 6, characterized in that the lifting mechanism (12) comprises a lifting screw (121) rotatably connected to the chair frame (1), and that the lifting screw (121) is arranged vertically; a sliding block (122) is connected on the lifting screw rod (121) in a threaded manner, and the sliding block (122) is connected with the hip seat (2); the lower end of the lifting screw rod (121) is connected with a bevel gear (123); the lifting mechanism (12) also comprises a driving rod (124) which is transversely and rotatably connected to the chair frame (1) and a driving rod rotation driving piece which drives the driving rod (124) to rotate; the end part of the driving rod (124) is provided with a driving bevel gear (125) which is meshed with the bevel gear (123) to drive the lifting screw rod (121) to rotate.

9. The wheelchair capable of being used as a nursing bed according to claim 8, characterized in that the chair frame (1) is also provided with a ground support mechanism (13) for supporting the ground after the wheelchair is flattened, the ground support mechanism (13) comprises a ground support sleeve (133) vertically arranged at the bottom of the chair frame (1) and a ground support block (131) vertically arranged in the ground support sleeve (133) in a sliding manner, the upper end of the ground support block (131) is connected with a ground support threaded rod (132), the ground support sleeve (133) is rotationally connected with a threaded sleeve (134), and the threaded sleeve (134) is in threaded fit with the ground support threaded rod (132); the upper end of the threaded sleeve (134) is connected with a threaded sleeve bevel gear (135), and the driving rod (124) is provided with a threaded sleeve driving bevel gear (136) which is meshed with the threaded sleeve bevel gear (135) to drive the threaded sleeve (134) to rotate, so that the ground supporting block (131) is driven to descend to tightly support the ground.