CN113940819B - A wheelchair that can be used as a nursing bed - Google Patents

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

A wheelchair that can be used as a nursing bed

technical field

The invention relates to the field of nursing instruments, in particular to a wheelchair which can be used as a nursing bed.

Background technique

Along with the progress of science and technology, in order to make the patient of lower extremity paralysis switch between sitting and lying down more conveniently, a lot of wheelchairs with lying function have been developed. However, in the wheelchairs in the prior art, the backrest can only be brought down to a certain angle, and the patient cannot lie completely flat, and the wheelchair has limited width and low comfort, which is far from the feeling of lying on a bed. Another part of the wheelchair that can completely recline the back of the chair and lie flat needs to be combined with the bed frame in order to be placed stably and realize the function of the bed, and this type of combined structure of the bed and chair needs to be aligned in the process of combination. Combining, and then needing the assistance of others to operate, still brings great inconvenience to the patient.

Contents of the invention

In view of the above technical problems, the present invention proposes a wheelchair that can be used as a nursing bed to solve the problem that the wheelchair bed in the prior art needs to be combined with a bed frame to realize the function of the bed.

In order to achieve the above object, the technical solution of the present invention is achieved in that:

A wheelchair that can be used as a nursing bed, comprising a chair frame and a sitting and reclining assembly movably connected to the chair frame, the sitting and reclining assembly includes hinged buttocks, backrests, armrests and leg rests, and the hips and seats are lifted and connected On the chair frame, the backrest and armrests are slid and hingedly connected with the chair frame through the sliding hinged seat; The seat and/or the chair frame are connected with the leg rest through a spreading mechanism, so that the sitting and lying components are expanded or contracted to switch between the sitting and lying states; the chair frame is provided with a locking mechanism for locking the backrest; Articulated with support legs supporting the backrest.

Preferably, the chair frame is provided with a crossbeam for supporting the backrest after the backrest is laid flat, and the locking mechanism includes a lock seat fixed in the crossbeam and a sliding part vertically slidably connected to the lock seat. There is 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 part is provided with a limit piece of the locking sleeve so that the locking sleeve slides down with the sliding part; the locking The sleeve is hinged with a lock hook, and the lock seat is provided with a pin shaft that drives the lock hook to swing to hook the backrest or release the backrest. Sliding fit; the beam is equipped with a locking drive assembly that drives the slider to slide up and down; the locking drive assembly includes a wedge block that slides horizontally with the slide and a telescopic drive that drives the wedge to move. The slide is equipped with a transverse perforation , the wedge surface of the wedge block is in sliding fit with the lower bottom surface of the transverse perforation.

Preferably, a side stopper is hinged on the armrest; a telescopic push mechanism is connected between the armrest sliding hinged seat and the side stopper, which is used to drive the side stopper to rotate vertically when the armrest is laid down, and When the handrail is rotated to be erected, the side stopper is driven to close up with the handrail.

Preferably, the telescopic push mechanism includes a sliding rod hinged with the side stopper and a sliding sleeve hinged with the sliding hinge seat of the armrest, the sliding sleeve is slidingly sleeved on the sliding rod; ring, the sliding rod is provided with an anti-slip protrusion that can be abutted against the sliding ring to limit the sliding rod, so that the sliding hinged seat of the handrail can be rotated vertically by pulling the side stopper through the telescopic push mechanism.

Preferably, the sliding rod is provided with elastic protrusions, and the elastic protrusions are arranged close to the anti-slip protrusions; when the sliding sleeve slides away from the side stopper, under the action of the pulling force generated by the sliding hinge seat of the armrest, the sliding ring squeezes After the elastic protrusion is located between the elastic protrusion and the anti-slip protrusion, it is convenient for the sliding sleeve to pull the sliding rod through the anti-slip protrusion, thereby pulling the side stopper to turn vertically; the elastic force of the elastic protrusion is greater than that of the side stopper When the sliding sleeve slides close to the side stopper, the sliding sleeve pushes the side stopper to quickly close with the armrest through the elastic protrusion, so as to prevent the side stopper from affecting the patient; and after the side stopper is closed, the sliding sleeve slides and hinges on the armrest Under the action of the seat sliding, the sliding ring squeezes the elastic projection and slides close to the side stopper.

Preferably, the two sides of the backrest are also hinged with backrest side edges to increase the area of the backrest after it is laid flat, and the backrest is provided with a flattening driver that drives the backrest side to rotate around the hinge point; the two sides of the leg rest are hinged It is convenient to increase the area of the leg rest by having the leg rest on the side, and the leg rest is provided with a leg flattening driver which drives the leg rest to rotate around the hinge point.

Preferably, the flattening driving member includes a push sleeve slidably connected in the backrest, a screw rod rotatably connected in the backrest and a drive member for driving the screw rod to rotate, one end of the push sleeve is threadedly connected with the screw rod, and the other end is passed through The hinged block is hingedly connected to the side of the backrest, and the backrest is provided with a limiter to limit the moving direction of the push sleeve; the hinged block is provided with a hinged hole for the hinged shaft to pass through, and the hinged hole and the hinged shaft are matched to avoid jamming; The driving part is a biaxial motor or the driving part includes a rotating motor, a gear connected to the output end of the rotating motor, and a screw gear meshing with the gear and fixedly connected to the screw.

Preferably, the backrest is provided with an outrigger driver that pushes the supporting leg to rotate from a fitted backrest to a vertical backrest, the outrigger driver is an electric push rod, and the electric pushrod pushes the support leg to rotate through the push rod; the backrest is provided with Limiting parts for limiting the supporting legs.

Preferably, the lifting mechanism includes a lifting screw that is rotatably connected to the chair frame, and the lifting screw is vertically arranged; a slider is threadedly connected to the lifting screw, and the slider is connected to the hip seat; the lower end of the lifting screw is connected to There are bevel gears; the lifting mechanism also includes a driving rod connected to the chair frame for lateral rotation and a driving rod rotating drive member for driving the driving rod to rotate; the end of the driving rod is provided with a driving bevel gear meshed with the bevel gear to drive the lifting screw rod rotation.

Preferably, the chair frame is also provided with a ground support mechanism for the wheelchair to be flattened to tighten the ground. The ground support mechanism includes a ground support sleeve vertically arranged at the bottom of the chair frame and a vertically slidable ground support sleeve arranged on the ground support sleeve. In the ground support block, the upper end of the ground support block is connected with a ground support threaded rod, and the ground support sleeve is connected with a threaded sleeve, which is threadedly matched with the ground support threaded rod; the upper end of the threaded sleeve is connected with a threaded sleeve bevel gear, and the drive rod The threaded sleeve is provided with a threaded sleeve meshing with the bevel gear of the threaded sleeve to drive the bevel gear to drive the rotation of the threaded sleeve, thereby driving the ground support block to descend and tighten the ground.

Beneficial effects of the present invention:

1. Through the lifting of the buttocks, the backrest and the armrests slide on the chair frame and rotate at the same time, so that the sitting and lying components can be expanded or contracted for convenient switching between the sitting and lying states, so that the patient can move from the sitting to the sitting position. The state can be switched freely to the lying state, neither the help of others nor the bed frame is required, and it also avoids the need to align the bed frame for splicing work;

2. The sitting and lying components are raised as a whole through the lifting mechanism. Compared with the wheelchairs in the prior art, the height of the wheelchair is closer to the normal bed, which is more convenient for the nursing staff, and only the lifting mechanism makes the deployment and lifting Realize linkage, more ingenious combination, more time-saving and labor-saving;

3. The armrests are also deployed on both sides of the hip seat, so that the lying area is increased, avoiding space limitation, and increasing the comfort after lying down;

4. The chair frame is equipped with a locking mechanism for locking the backrest, which is used to fix and support the backrest after the backrest is laid flat, which not only plays a certain supporting role, but also ensures the stability of the sitting and lying components after unfolding;

5. The backrest is hinged with supporting legs that support the backrest. After the sitting and lying components are unfolded, the backrest is supported to keep the entire wheelchair placed stably in the bed state;

6. By setting the side stopper on the armrest, the telescopic push mechanism is used to push the side stopper to turn vertically when the armrest is flat, and play the role of side stopper to prevent the patient from falling off the wheelchair, and when the armrest is turned to stand up Immediately drive the side block and the armrest to close during the process to avoid hindering the normal use of the wheelchair

7. The sides of the backrest and legrest are hinged to increase the area after the backrest and legrest are unfolded and flattened, further increasing the lying area and making the patient more comfortable when lying down.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of the present invention after laying flat;

Fig. 3 is a schematic cross-sectional structure diagram of A-A in Fig. 1;

Fig. 4 is a schematic cross-sectional structure diagram of D-D in Fig. 2;

Fig. 5 is a partially enlarged view of B in Fig. 4;

Fig. 6 is a partially enlarged view of C in Fig. 3;

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

Fig. 8 is a partial enlarged view of E in Fig. 7;

Fig. 9 is a schematic structural view of the lock seat of the present invention;

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

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

Figure 12 is a partially enlarged view of H in Figure 3;

Figure 13 is a partial enlarged view of K in Figure 2;

Fig. 14 is a schematic structural diagram of Embodiment 6 of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figures 1 to 13, a wheelchair that can be used as a nursing bed according to an embodiment of the present invention includes a chair frame 1 and a sitting and lying assembly movably connected to the chair frame 1, and the sitting and lying assembly includes a hinged The hip seat part 2, the backrest 3, the armrest 4 and the leg rest part 5, the backrest 3, the armrest 4 and the leg rest part 5 are respectively hinged on the corresponding positions of the hip seat part 2 and the hip seat part 2 is lifted and connected on the chair frame 1 , the backrest 3 and the armrest 4 are all slid and hingedly connected to the chair frame 1 through a sliding hinge seat; the chair frame 1 is provided with a lifting mechanism 12 that drives the hip seat 2 to lift; the chair frame 1 is provided with various electric drives for controlling the wheelchair. The bottom of the chair frame 1 is equipped with a rechargeable battery that supplies power to each electric driving part. The lifting mechanism 12 is used to control the lifting mechanism 12 to drive the lifting of the hip seat part 2 to drive the backrest 3 and the armrest 4 to slide on the chair frame 1 and rotate at the same time. The backrest 3, the armrest 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 stretching mechanism, so that the sitting and lying components are expanded or contracted in the sitting or walking It is convenient to switch between the states, so that the patient can freely switch from the sitting state to the lying state without the help of others or the bed frame, and avoids the need to align the bed frame Carry out splicing work; and the armrests 4 are also deployed on both sides of the hip seat 2, so that the lying area increases, avoiding space constraints, and increasing the comfort after lying down; the chair frame 1 is provided with a locking backrest 3 The locking mechanism 6 is used to fix and support the backrest 3 after the backrest 3 is laid flat, that is, it plays a certain supporting role, and can also ensure the stability of the sitting and lying assembly after unfolding; in addition, the backrest 3 is hinged with a supporting backrest 3 The supporting legs 10 are used to support the backrest 3 after the sitting and lying assembly is launched to keep the entire wheelchair placed stably in the bed state.

Preferably, as shown in FIGS. 7 to 10 , the chair frame 1 is provided with a crossbeam 101 for supporting the backrest 3 after the backrest 3 is laid flat, and the locking mechanism 6 includes a lock seat 64 fixed in the crossbeam 101 and a vertical Slidingly connected to the slider 61 on the lock base 64, the lock base 64 bottom is provided with a vertical slideway for the slider 61 to slide, and the upper part is provided with a larger accommodation space; the slider 61 is sleeved with a spring 69 and a sliding The locking sleeve 62, the spring 69 and the locking sleeve 62 are located in the accommodation space, the locking sleeve 62 is located above the spring 69, the lower part of the locking sleeve 62 is provided with a spring space for accommodating the spring 69, and the spring 69 is clamped in Between the top surface of the spring space of the locking sleeve 62 and the bottom surface of the accommodating space between the lock seat 64, and the upper end of the slider 61 is provided with a stopper 67 for limiting the locking sleeve 62 so that the locking sleeve 62 slides accordingly. Part 61 slides down. In the present embodiment, the stopper 67 is a nut threadedly connected with the sliding part 61; the lock sleeve 62 is hinged with a lock hook 63, and the corresponding position of the backrest 3 is provided with a lock hook 63 hooked. Locking part; the lock seat 64 is provided with a pin shaft 65 that drives the lock hook 63 to swing for hooking the backrest 3 or releasing the backrest 3; in this embodiment, the locking sleeve 62 is symmetrically hinged with the lock hook 63, and the lock seat The corresponding position on 64 is provided with symmetrical bearing pin 65, and bearing pin 65 is arranged through locking hook 63; Cooperate; the crossbeam 101 is provided with a locking drive assembly that drives the slider 61 to slide up and down; the locking drive assembly includes a wedge block 68 that slides horizontally with the slider 61 and a telescopic drive that drives the wedge block 68 to move, the slider 61 There is a transverse perforation inside, and the wedge surface of the wedge-shaped block 68 slides and fits with the bottom surface of the transverse perforation; when the wedge-shaped block 68 moves close to the slider 61, the slider 61 slides down and drives the locking sleeve 62 to slide down. On the one hand, the spring 69 is compressed, On the other hand, the lock hook 63 is swung to loosen the locking portion on the backrest 3; when the slide 61 moves away from the slide 61, the slide 61 slides up under the action of the spring and drives the lock sleeve 62 to slide up, so that Two locking hooks 63 rotate outwards to lock the locking part on the backrest 3; in this embodiment, the locking part is a groove corresponding to the position of the locking mechanism 6 on the back of the backrest 3, and the mouth of the groove is provided with a transverse opening. Along the mouth, the lock hook 63 buckles the mouth edge to achieve the purpose of locking. In addition, the lower part of the backrest 3 is provided with a backrest chute for the sliding hinge seat of the backrest 3 to slide.

Preferably, as shown in Figures 3 to 6, side guards 7 are hinged on the armrest 4, and the side guards 7 have a "factory"-shaped structure, and the side guards 7 are embedded in the upper part of the handrail 4, and the armrest 4 The corresponding position is provided with an accommodating groove for accommodating the side baffle 7 and for the side baffle 7 to rotate around the hinge point. When it is a bed, it is opened to be perpendicular to the armrest 7; a telescopic push mechanism 8 is connected between the armrest sliding hinged seat and the side stopper 7 slidingly matched with the armrest 4, which is used to push the side stopper 7 to rotate vertically when the armrest 4 is laid down. Straight, play the effect of side block to prevent the patient from falling off the wheelchair; and drive the side block 7 and the handrail 4 to close together when the armrest 4 is rotated to be erected, so as to avoid hindering the normal use of the wheelchair. The armrest 4 is provided with a hinged seat chute for sliding the sliding hinged seat of the handrail. The chute communicates with the lower end of the receiving groove.

Preferably, as shown in Figures 5 and 6, the telescopic push mechanism 8 includes a sliding rod 81 hinged with the side stopper 7 and a sliding sleeve 82 hinged with the sliding hinge seat of the armrest, the sliding sleeve 82 is slidably sleeved on the sliding rod 81; the sliding sleeve 82 is provided with a sliding ring 821 that is slidingly matched with the sliding rod 81 inside the end of the sliding sleeve 82 near the side stopper 7, and the sliding rod 81 is provided with a stop that can abut against the sliding ring 821 to limit the position near the sliding hinge seat 82 of the handrail. Sliding protrusion 83, so that the sliding hinge seat of the armrest pulls the side stopper 7 to rotate vertically through the telescopic pushing mechanism 8.

Specifically, as shown in FIG. 5 and FIG. 6, the sliding rod 81 is provided with an elastic protrusion 84, and the elastic protrusion 84 is arranged close to the anti-slip protrusion 83. In this embodiment, the elastic protrusion 84 includes two sides. The convex block on the arc surface or the inclined surface is connected to the inner wall of the sliding rod 81 through the spring; when the sitting and lying assembly is flattened, the sliding sleeve 82 slides away from the side stopper 7, and under the action of the pulling force generated by the sliding hinge seat of the armrest, the sliding After the ring 821 squeezes the elastic protrusion 84, it is located between the elastic protrusion 84 and the anti-slip protrusion 83, so that the sliding sleeve 82 can pull the sliding rod 81 through the anti-slip protrusion 83, thereby pulling the side stopper 7 to rotate vertically; The elastic force of the protrusion 84 is greater than the driving force of the side stopper 7. When the sitting and lying assembly shrinks to the sitting state, the sliding sleeve 82 slides towards the side stopper 7. At the first time, the sliding sleeve 82 passes through the elastic protrusion 84 immediately. Push the side stopper 7 to quickly close up with the armrest 4, so as to prevent the side stopper 7 from protruding and affecting the patient; Under the blocking action of the groove, the sliding ring 821 is pressed against the elastic protrusion 84 and slides close to the side stopper 7 .

Preferably, as shown in Figure 11, the backrest 3 is also hinged with backrest sides 31 on both sides so as to increase the area of the backrest 3 after it is laid flat. Driver 9; both sides of the leg rest are also hinged with leg rest 51 to facilitate increasing the area of the leg rest 5, and the leg rest 5 is provided with a leg that drives the leg rest 51 to rotate around the hinge point to flatten driver.

Preferably, as shown in Figures 1 and 2, the backrest 3 is provided with an outrigger driver that pushes the support leg 10 to rotate from the fitted backrest 3 to a vertical backrest 3, the outrigger driver is an electric push rod, and the electric pusher The rod pushes the support leg 10 to rotate through the push rod 11; the backrest 3 is provided with a limit piece for limiting the support leg 10 to prevent the support leg 10 from rotating beyond the limit.

Preferably, as shown in Figure 3, the lifting mechanism 12 includes a lifting screw 121 that is rotatably connected to both sides of the chair frame 1, and the lifting screw 121 is vertically arranged; the lifting screw 121 is threadedly connected with a slider 122 , the slider 122 is connected with the hip seat part 2; the lower end of the lifting screw 121 is connected with a bevel gear 123; the lifting mechanism 12 also includes a drive rod 124 connected to the chair frame 1 for lateral rotation and a drive rod for driving the drive rod 124 to rotate. Components; the end of the driving rod 124 is provided with a driving bevel gear 125 meshed with the bevel gear 123 to drive the rotation of the lifting screw 121 . In this embodiment, the driving rod rotation driving part includes a rotating motor fixed on the chair frame 1 , a gear connected to the output end of the rotating motor and a driving rod gear meshed with the gear, and the driving rod gear is fixedly connected to the driving rod 124 . In this embodiment, two sliders 122 are respectively arranged on both sides of the bottom of the buttock seat part 2, and two driving rods 124 and two driving rod rotating driving parts are arranged on the chair frame 1, and each driving rod rotating driving part is connected with a driving rod. The rods 124 cooperate, and the two ends of a driving rod 124 respectively drive a slide block 122 to go up and down.

The difference between Embodiment 2 and Embodiment 1 is that, as shown in Figure 3 and Figure 12, the chair frame 1 is also provided with a ground support mechanism 13 for the wheelchair to be flattened to tighten the ground, and the ground support mechanism 13 includes The ground support sleeve 133 that is vertically arranged at the bottom of the chair frame 1 and the ground support block 131 that is vertically slidably arranged in the ground support sleeve 133, the bottom surface of the ground support block 131 is provided with a friction block, which increases the distance between the ground support block 131 and the ground. Frictional force; the upper end of the space-limiting ground support block 131 is connected with a vertical ground support threaded rod 132, and the ground support sleeve 133 is rotated to be connected with a threaded sleeve 134, and the threaded sleeve 134 is threadedly matched with the ground support threaded rod 132; the ground support threaded rod 132 is provided with a ground support slider 137 that is slidably matched with the ground support sleeve 133, and the ground support sleeve 133 is provided with a limit bar that restricts the ground support block 131 to only slide vertically and will not rotate. There is a groove that cooperates with the limit bar; the upper end of the threaded sleeve 134 is connected with a threaded sleeve bevel gear 135, and the drive rod 124 is provided with a threaded sleeve driving bevel gear 136 meshed with the threaded sleeve bevel gear 135 to drive the rotation of the threaded sleeve 134 , so as to drive the ground support block 131 to descend and tighten the ground, so as to keep the stability of the wheelchair after being unfolded. The work of the ground support mechanism 13 is driven by the driving of the lifting mechanism 12, which plays the role of energy saving and emission reduction, and, through the auxiliary function of the ground support mechanism 13, the stability of the wheelchair after being unfolded into a bed is further ensured.

The difference between Embodiment 3 and Embodiment 1 is that, as shown in FIG. 11 , the flattening drive member 9 includes a push sleeve 91 slidably connected in the backrest 3 , a screw rod 92 rotatably connected in the backrest 3 and The driving member that drives the screw rod 92 to rotate, pushes one end of the sleeve 91 to be threadedly connected to the screw rod 92 , and the other end is hingedly connected to the backrest side 31 through the hinge block 93 . Since the backrest 3 is symmetrically provided with the backrest side edges 31 on both sides, in this embodiment, the backrest 3 is provided with symmetrical push sleeves 91, screw rods 92 and hinge blocks 93 for respectively driving the backrest side edges 31 on both sides to expand. and shrink toward the backrest 3; the backrest 3 is provided with a limit portion that pushes the direction of movement of the sleeve 91 to prevent the rotation of the sleeve 91. The limit portion can be a limit block or a limit groove, and the push sleeve 91 is provided with a The corresponding structure of the limit block or the limit slot; 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 clearance-fitted to avoid jamming. In this embodiment, the driving member is a biaxial motor. In other embodiments, the driving member includes a rotating motor fixed on the back of the backrest 3 , a gear connected to the output end of the rotating motor and a screw gear meshed with the gear, and the screw gear is fixedly connected to the screw rod 92 . The leg flattening driver adopts the same structure as the flattening driver 9 .

Embodiment 4, as shown in FIG. 13 , differs from Embodiment 1 in that the spreading mechanism 14 includes a spreading pushing block 141 that is slidably connected to the front end of the buttock seat 2 , and a stretching pushing block 141 that is threadedly connected. Stretch the screw mandrel 142 and drive the strut motor 143 that stretches the screw mandrel 142 to rotate. Stretch the push block 141 and set it toward the leg rest part 5. Stretch the front end of the push block 141 as an arc surface, and stretch it along with the rotation of the screw mandrel 142. The pushing block 141 slides forward and pushes out, and the leg resting part 5 is pushed up and kept flattened with the hip seat part 2 . The buttock seat part 2 is provided with a limiting bar that restricts the stretching push block 141 to only slide horizontally and not rotate, and the stretching push block 141 is provided with a groove that cooperates with the limit bar

Embodiment 5 differs from Embodiment 4 in that the spreading mechanism includes a spreading electric push rod arranged at the front end of the hip seat 2 and a spreading push block arranged at the front end of the spreading electric push rod.

Embodiment 6, the difference from Embodiment 1 is that the spreading mechanism includes a spreading rod 144, a sliding column 1 145 arranged at the bottom of the chair frame 1 and a sliding column 2 146 at the bottom of the hip seat 2, and the spreading rod One end of 144 is hinged and slidably matched with the leg by the sliding hinged seat and the leg by the part 5, and the back of the leg by the part 5 is provided with a leg by the chute for the leg to slide by the sliding hinged seat; The first oblong hole 145 passes through and is slidably matched with the sliding column one 145, and the middle part of the spreader rod 144 is provided with the oblong hole two for the sliding column two 146 to pass through and slidingly cooperates with the sliding column two 146. The up and down movement of the sliding column 2 146 driven by the buttock seat part 2 drives the stretching rod 144 to swing, and at the same time cooperates with the sliding of the leg resting hinge seat in the leg resting chute, and the stretching rod 144 stretches the leg resting part 5 to be flattened or Pulling is the state of putting down.

All the above-mentioned rotational connections are rotational connections through bearings.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (9)

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.