Multifunctional nursing bed and control method thereof

Abstract

The invention relates to a multifunctional nursing bed and a control method thereof.The multifunctional nursing bed comprises a bed head, a bed tail, an upper bed frame, a lower bed frame, a rotation driving device and a bottom bed frame, the bed frame is horizontally arranged at the top of the lower bed frame, the upper bed frame is rotationally arranged at the top of the lower bed frame with a vertical line as a rotating shaft, and the rotation driving device is arranged on the lower bed frame and drives the upper bed frame to rotate horizontally; the upper bed frame comprises a backrest frame, a waist frame, a leg lifting frame, a backrest overturning driving device and a leg lifting driving device, and the leg lifting driving device drives the leg lifting frame to overturn up and down. The rotary driving device is used for driving the upper bed frame to rotate horizontally, and the backrest overturning driving device is used for driving the backrest frame to overturn up and down, so that a patient can conveniently get in and out of the bed or change the rest posture of the patient. Besides, the leg lifting frame can lift the legs under the driving of the leg lifting driving device, so that a doctor or a nurse can treat the patient conveniently. Therefore, the upper bed frame can be changed into a backrest chair and can be flattened to realize the functions of sitting, sleeping and lifting legs.

Description

Technical Field

[0001] This invention relates to the technical field of nursing beds, and in particular to a multifunctional nursing bed and its control method. Background Technology

[0002] Nursing beds are products designed to assist patients in special care to get up, lie down, and defecate. They are mainly targeted at patients in special care, including those with limited mobility, postoperative care, muscle weakness, moderate to severe disability, long-term bed rest, and high-level paralysis. These patients may experience muscle atrophy and other problems due to prolonged bed rest.

[0003] With the development of medical devices, most existing nursing beds can now be folded, for example, the backrest can be raised to allow patients to lean against it and adjust their lying posture for greater comfort. The structure of existing nursing beds is exemplified by a urology nursing bed disclosed in Chinese Patent Publication No. CN112426299B on October 15, 2021. However, the upper frame of these existing nursing beds cannot rotate horizontally, making it inconvenient for patients with difficulty getting out of bed, and also preventing them from automatically lifting their legs or adjusting their lying posture.

[0004] Therefore, the applicant, through structural improvements and refinements, and in conjunction with the aforementioned existing technologies, provides a new technical solution for consumers to choose from. Summary of the Invention

[0005] The primary objective of this invention is to provide a multifunctional nursing bed that can be converted into a backrest chair, has a leg-raising function, and facilitates patient getting in and out of bed.

[0006] The first objective of this invention is achieved as follows: A multifunctional nursing bed includes a headboard, a footboard, an upper bed frame, a lower bed frame, a rotation drive mechanism, and a base bed frame. The upper bed frame houses a mattress and is horizontally positioned on top of the lower bed frame. The upper bed frame rotates around a vertical axis on top of the lower bed frame. The headboard is located at one end of the lower bed frame, and the footboard is located at the other end. The lower bed frame is mounted on the base bed frame. The rotation drive mechanism is located on the lower bed frame and drives the upper bed frame to rotate horizontally. The upper bed frame includes a backrest, a lumbar support, and a leg support. The invention includes a backrest tilting drive mechanism and a leg-raising drive mechanism. The backrest frame, lumbar support frame, and leg-raising frame are horizontally arranged sequentially on the lower bed frame, aligned horizontally. They are hinged together sequentially. The lumbar support frame rotates horizontally on the lower bed frame, while the backrest frame and leg-raising frame sit on it. The backrest tilting drive mechanism, located on the lumbar support frame, drives the backrest frame to tilt up and down. Similarly, the leg-raising drive mechanism, also located on the lumbar support frame, drives the leg-raising frame to tilt up and down. This invention utilizes a rotary drive mechanism to rotate the upper bed frame horizontally, while simultaneously using a backrest tilting drive mechanism to tilt the backrest frame up and down, thus facilitating patient entry and exit from bed or changing the patient's resting posture. The upper bed frame of this invention is controlled by a rotary drive mechanism, which has a longer lever arm and requires less effort. Furthermore, the backrest and leg-raising frame of this invention, driven by the backrest flipping drive device and the leg-raising drive device respectively, can raise the patient's back and legs, thereby facilitating treatment by doctors or nurses and changing the patient's posture on the nursing bed, which helps the patient's body recover quickly. Therefore, the bed frame of this invention can be transformed into a chair with a backrest, can be flattened, and realizes sitting, sleeping, and leg-raising functions.

[0007] The present invention can be further improved in the following ways.

[0008] The fixed end of the rotary drive device is rotatably connected to the lower bed frame, the telescopic end of the rotary drive device is rotatably connected to the upper bed frame, and the telescopic end of the rotary drive device is eccentrically set to the rotating shaft of the upper bed frame.

[0009] The leg-raising frame includes a lower leg frame, a leg-raising connecting rod, and a foot support frame. The waist frame, lower leg frame, and foot support frame are hinged in sequence. The leg-raising connecting rod is rotatably located at the bottom of the waist frame. The telescopic end of the leg-raising drive device is rotatably connected to one end of the leg-raising connecting rod, and the other end of the leg-raising connecting rod is slidably connected to the foot support frame. The leg-raising drive device is located at the bottom of the waist frame and drives the foot support frame to rotate up and down relative to the lower leg frame, thereby causing the lower leg frame to rotate up and down.

[0010] The present invention also includes a rotating mechanism, wherein the upper bed frame is horizontally rotated on the lower bed frame via the rotating mechanism. The rotating mechanism includes a lower fixed plate and an upper rotating plate, the upper rotating plate is horizontally rotated on top of the lower fixed plate, the upper bed frame is mounted on the upper rotating plate, and the lower fixed plate is mounted on the lower bed frame.

[0011] This invention also includes two lifting mechanisms. The lower bed frame is lifted and mounted on the base bed frame, with two lifting mechanisms positioned one on the left and one on the right between the lower bed frame and the base bed frame. These two lifting mechanisms drive the lower bed frame to rise and fall relative to the base bed frame. Each lifting mechanism includes a lifting drive device, a first lifting link, and a second lifting link. The fixed end of the lifting drive device is rotatably connected to the lower bed frame, and the telescopic end of the lifting drive device is rotatably connected to the middle of the first lifting link. The upper end of the first lifting link is rotatably connected to the lower bed frame, and the lower end of the first lifting link is rotatably connected to the base bed frame. The upper end of the second lifting link is rotatably connected to the middle of the first lifting link, and the lower end of the second lifting link is rotatably connected to the base bed frame. The two lifting mechanisms can synchronously drive the lower bed frame to rise and fall horizontally, or independently control the height of both sides of the lower bed frame to meet the user's requirements for the tilt angle of the lower bed frame. The forward and backward lifting can be independently controlled, ensuring that both ends can be raised and lowered to the correct position. Independent forward and backward lifting control also allows for a back-and-forth rocking function, which may be helpful for certain patients in a medical context.

[0012] The base frame includes a base frame, at least two front casters, and at least two rear casters. The at least two front casters are located on one side of the base frame, and the at least two rear casters are located on the other side. The base frame is characterized by having independent locking and releasing mechanisms corresponding to the positions of the rear casters and front casters. A front drive shaft is horizontally rotatable on the base frame between the two front casters, and is connected to the locking and releasing mechanisms of the front casters. A rear drive shaft is horizontally rotatable on the base frame between the two rear casters, and is also connected to the locking and releasing mechanisms of the rear casters. The front and rear drive shafts are connected via a synchronous transmission mechanism. At least one end of either the front or rear drive shaft is fixedly connected to a locking and releasing handle. The braking control mechanisms of each caster are linked; pressing one brake locks or unlocks all casters, avoiding the need for individual caster control.

[0013] The present invention also includes a rotating mechanism, wherein the upper bed frame is horizontally rotated on the lower bed frame via the rotating mechanism. The rotating mechanism includes a lower fixed plate and an upper rotating plate, the upper rotating plate is horizontally rotated on top of the lower fixed plate, the upper bed frame is mounted on the upper rotating plate, and the lower fixed plate is mounted on the lower bed frame.

[0014] The leg-raising frame includes a lower leg frame, a leg-raising connecting rod, and a foot support frame. The waist frame, lower leg frame, and foot support frame are hinged in sequence and are aligned horizontally. The leg-raising connecting rod is rotatably located at the bottom of the waist frame. The telescopic end of the leg-raising drive device is rotatably connected to one end of the leg-raising connecting rod, and the other end of the leg-raising connecting rod is slidably connected to the foot support frame. The leg-raising drive device is located at the bottom of the waist frame and drives the foot support frame to rotate up and down relative to the lower leg frame, thereby causing the lower leg frame to rotate up and down.

[0015] The bottom surface of the support frame is provided with a driven plate, and the driven plate is provided with a sliding groove. The second end of the leg lifting link is slidably connected to the sliding groove.

[0016] The rotation drive, backrest tilting drive, and leg lifting drive are all push rod motors.

[0017] The lumbar support frame has foldable guardrails on both sides, which can be folded down to facilitate the transfer of patients on the nursing bed.

[0018] The telescopic end of the rotary drive device is rotatably connected to one end of the mounting bracket.

[0019] The mounting bracket is orthogonally connected to the bottom of the waist frame.

[0020] This invention also includes two lifting mechanisms, one on the left and one on the right, positioned between the lower bed frame and the base bed frame. These two mechanisms drive the lower bed frame to rise and fall relative to the base bed frame. Each lifting mechanism includes a lifting drive device, a first lifting link, and a second lifting link. The fixed end of the lifting drive device is rotatably connected to the lower bed frame, and the telescopic end of the lifting drive device is rotatably connected to the middle of the first lifting link. The upper end of the first lifting link is rotatably connected to the lower bed frame, and the lower end is rotatably connected to the base bed frame. The upper end of the second lifting link is rotatably connected to the middle of the first lifting link, and the lower end is rotatably connected to the base bed frame. The two lifting mechanisms can synchronously drive the lower bed frame to rise and fall horizontally, or independently control the height of both sides of the lower bed frame to meet the user's requirements for the tilt angle of the lower bed frame. The forward and backward lifting can be independently controlled, ensuring that both ends can be raised and lowered to the correct position. This independent control of the forward and backward lifting also allows for a back-and-forth rocking function, which may be helpful for certain patients in a medical context.

[0021] The invention also includes a caster linkage braking mechanism. The bed frame includes a base frame, at least two front casters, and at least two rear casters. The at least two front casters are located on one side of the base frame, and the at least two rear casters are located on the other side. The key feature is that the base frame has independent locking and releasing mechanisms corresponding to the positions of the rear casters and the front casters. A front drive shaft is horizontally rotatable on the base frame between the two front casters, and the front drive shaft is drive-connected to the locking and releasing mechanisms of the front casters. A rear drive shaft is horizontally rotatable on the base frame between the two rear casters, and the rear drive shaft is drive-connected to the locking and releasing mechanisms of the rear casters. The front drive shaft and the rear drive shaft are drive-connected via a synchronous transmission mechanism. At least one end of either the front drive shaft or the rear drive shaft is fixedly connected to a locking and releasing handle. The braking control mechanisms of each caster are linked; pressing one brake locks or unlocks all casters, avoiding the need for individual caster control.

[0022] The synchronous transmission mechanism includes a front transmission plate, a transmission rod, and a rear transmission plate. One end of the front transmission plate is fixedly connected to the front transmission shaft, and the other end is rotatably connected to the front end of the transmission rod. One end of the rear transmission plate is fixedly connected to the rear transmission shaft, and the other end is rotatably connected to the rear end of the transmission rod. The locking and releasing lever is lever-shaped, making it convenient for the user to step on it to lock and release the casters.

[0023] The second objective of this invention is to provide a multifunctional nursing bed that can be converted into a backrest chair, has a leg-lifting function, and facilitates patients getting in and out of bed.

[0024] The second objective of this invention is achieved as follows: The control method for the aforementioned multifunctional nursing bed includes: Step 1: The telescopic end of the leg-lifting drive device extends, the first end of the leg-lifting linkage rotates downward, and the second end of the leg-lifting linkage slides at the bottom of the footrest, thereby driving the second end of the leg-lifting linkage to rotate upward, which in turn drives the footrest to rise. The lower leg support also rotates upward. After the footrest rises, the footrest is offset from the fixed bed frame on the lower bed frame. At the same time, the backrest flipping drive device drives the backrest frame to rotate upward to a set angle, and the patient's back and legs are lifted. Step 2; Then, the push rod of the rotary drive device extends, and the push rod of the rotary drive device pushes the mounting bracket to rotate to the set angle. The mounting bracket drives the waist frame, backrest frame, leg frame and foot support frame to rotate together to the set angle. Step 3: Next, the telescopic end of the leg-lifting drive device retracts, the first end of the leg-lifting linkage rotates upward, and the second end of the leg-lifting linkage rotates downward, thereby driving the foot support to descend and rotate downward. The foot support drives the lower leg support to rotate downward, and the foot support finally remains in a horizontal state. At this time, the entire upper bed frame becomes a backrest chair.

[0025] The beneficial effects of this invention are as follows: 1. This invention utilizes a rotary drive device to drive the upper bed frame to rotate horizontally, and a backrest flipping drive device to drive the backrest frame to flip vertically, thereby facilitating patients getting in and out of bed or changing their resting posture. The upper bed frame of this invention is controlled to rotate by a rotary drive device, which has a longer lever arm and requires less effort.

[0026] 2. Furthermore, the backrest frame and leg lift frame of the present invention, driven by the backrest flipping drive device and the leg lift drive device respectively, can lift the patient's back and legs, thereby facilitating treatment by doctors or nurses and changing the patient's posture on the nursing bed, which helps the patient's body recover quickly. Therefore, the bed frame of the present invention can be transformed into a backrest chair, can be flattened, and realizes sitting, sleeping, and leg lift functions.

[0027] 3. Furthermore, the two lifting mechanisms of this invention can independently drive the bed frame to rise and fall horizontally, ensuring that the left and right ends of the bed frame are raised and lowered in place. They can also independently control the height of the two sides of the bed frame to meet the user's requirements for the tilt angle of the bed frame.

[0028] 4. Furthermore, the lifting and lowering of the left and right ends of the bed frame of the present invention can be independently controlled, ensuring that the left and right ends of the bed frame can be raised and lowered to the correct position. The independent lifting and lowering of the left and right ends of the upper bed frame can also be derived to have a left and right swaying function, which is helpful for some patients in medicine.

[0029] 5. The leg support and footrest of the present invention can lift the patient's legs under the drive of the leg lifting drive device, thereby facilitating the doctor or nurse to treat the patient, and can also change the patient's posture on the nursing bed, which helps the patient's body recover quickly.

[0030] 6. This invention achieves linkage and braking control of the locking and releasing mechanisms of each caster through the front drive shaft, the rear drive shaft, and the synchronous transmission mechanism. When the user steps on one locking and releasing lever, all casters can be locked or unlocked at the same time. The operation is very convenient and simple, thus avoiding the inconvenience and cumbersome control of each caster individually. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the multifunctional nursing bed of the present invention.

[0032] Figure 2 This is a schematic diagram of the structure of the multifunctional nursing bed of the present invention, which is converted into a backrest chair (mattress omitted).

[0033] Figure 3 This is an exploded view of the multifunctional nursing bed of the present invention.

[0034] Figure 4 This is a schematic diagram of the structure of the multifunctional nursing bed of the present invention after omitting the headboard, footboard and mattress.

[0035] Figure 5 This is a schematic diagram of the multifunctional nursing bed of the present invention from another angle, omitting the headboard, footboard, and mattress.

[0036] Figure 6 This is a schematic diagram of the third angle of the multifunctional nursing bed of the present invention, omitting the headboard, footboard, and mattress.

[0037] Figure 7 This is a schematic diagram of the upper bed frame and rotary drive device of the present invention.

[0038] Figure 8 This is a schematic diagram of the structure of the upper bed frame of the present invention, which can be flipped into a backrest chair.

[0039] Figure 9This is a schematic diagram of the structure of the leg-lifting frame of the present invention when it rotates to lift the leg.

[0040] Figure 10 This is a side view of the leg-raising frame of the present invention when it rotates to raise the leg.

[0041] Figure 11 This is a structural schematic diagram of the lower bed frame, rotary drive device, and waist frame of the present invention.

[0042] Figure 12 This is a schematic diagram of the lower bed frame, rotary drive device, and waist frame (in a rotating state) of the present invention from another angle.

[0043] Figure 13 This is a structural schematic diagram of the lower bed frame and the base bed frame of the present invention.

[0044] Figure 14 This is a schematic diagram of the structure of the bed frame of the present invention.

[0045] Figure 15 This is a cross-sectional view of the bed frame of the present invention.

[0046] Figure 16 This is an exploded view of the caster of the present invention.

[0047] Figure 17 yes Figure 15 Enlarged view of point A in the middle.

[0048] Figure 18 This is a more detailed exploded view of the caster of the present invention.

[0049] Figure 19 This is a schematic diagram of the rotating mechanism of the present invention. Detailed Implementation

[0050] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0051] Example 1, as Figures 1 to 19As shown, a multifunctional nursing bed includes a headboard 6, a footboard 7, an upper bed frame 1, a fixed bed frame 114, a rotary drive device 19, a lower bed frame 2, two lifting mechanisms 4, and a base bed frame 5. A mattress 8 is mounted on the upper bed frame 1 and the fixed bed frame 114. The upper bed frame 1 is horizontally positioned on top of the lower bed frame 2 and rotates around a vertical axis on top of the lower bed frame 2. The headboard 6 is located at one end of the lower bed frame 2, and the footboard 7 is located at the other end. The lower bed frame 2 is mounted on the base bed frame 5. The rotary drive device 19 is located on the lower bed frame 2 and drives the upper bed frame 1 to rotate horizontally. The upper bed frame 1 includes a backrest frame 11, a lumbar support frame 12, a leg support frame 10, and a backrest frame 11. The backrest flipping drive device 16 and the leg lifting drive device 15, the backrest frame 11, the lumbar support frame 12, the leg lifting frame 10, and the fixed bed frame 114 are arranged horizontally on the lower bed frame 2 in sequence. The backrest frame 11, the lumbar support frame 12, and the leg lifting frame 10 are hinged together in sequence. The backrest frame 11, the lumbar support frame 12, the leg lifting frame 10, and the fixed bed frame 114 are aligned in the horizontal direction. The lumbar support frame 12 is horizontally rotated and mounted on the lower bed frame 2. The backrest frame 11 and the leg lifting frame 10 sit on the lower bed frame 2. The backrest flipping drive device 16 is mounted on the lumbar support frame 12 and drives the backrest frame 11 to flip up and down. The leg lifting drive device 15 is mounted on the lumbar support frame 12 and drives the leg lifting frame 10 to flip up and down.

[0052] This is a more specific technical solution of the present invention.

[0053] The fixed end of the rotary drive device 19 is rotatably connected to the lower bed frame 2, the telescopic end of the rotary drive device 19 is rotatably connected to the upper bed frame 1, and the telescopic end of the rotary drive device 19 is eccentrically set with the rotating shaft of the upper bed frame 1.

[0054] The backrest frame 11 is provided with guide ramps 112 on both sides. The guide ramps 112 extend inclinedly towards the inside of the lower bed frame 2 and are located inside the lower bed frame 2. When the guide ramps 112 guide the backrest frame 11 to flip and descend, the backrest frame 11 can be vertically aligned with the lower bed frame 2, and the lower bed frame 2 can stably support the backrest frame 11.

[0055] Multiple first support columns 21 are provided between the lower bed frame 2 and the upper bed frame 1 to support the upper bed frame 1.

[0056] The leg-lifting frame 10 includes a lower leg frame 13, a leg-lifting link 17, and a foot support frame 14. The waist frame 12, lower leg frame 13, and foot support frame 14 are hinged in sequence. The waist frame 12, lower leg frame 13, and foot support frame 14 are aligned in the horizontal direction. The leg-lifting link 17 is rotatably located at the bottom of the waist frame 12. The telescopic end of the leg-lifting drive device 15 is rotatably connected to one end of the leg-lifting link 17, and the other end of the leg-lifting link 17 is slidably connected to the foot support frame 14. The leg-lifting drive device 15 is located at the bottom of the waist frame 12 and drives the foot support frame 14 to rotate up and down relative to the lower leg frame 13, thereby causing the lower leg frame 13 to rotate up and down.

[0057] The lower leg support 13 and the footrest 14 sit on the lower bed frame 2.

[0058] The bottom of the lumbar support frame 12 is fixedly connected to the mounting bracket 110. The fixed end of the backrest flipping drive device 16 is rotatably connected to one side of the mounting bracket 110, and the telescopic end of the backrest flipping drive device 16 is rotatably connected to the backrest frame 11.

[0059] The fixed end of the leg-lifting drive device 15 is rotatably connected to the other side of the mounting bracket 110, and the telescopic end of the leg-lifting drive device 15 drives the leg-lifting frame 10 to rotate.

[0060] The leg-lifting linkage 17 is rotatably mounted on the mounting bracket 110 and is located between the leg-lifting drive device 15 and the foot support.

[0061] The telescopic end of the rotary drive device 19 is rotatably connected to one end of the mounting bracket 110.

[0062] Mounting bracket 110 is orthogonally connected to the bottom of waist bracket 12.

[0063] The mounting bracket 110 is orthogonally connected to the bottom of the waist frame 12. The structure of the present invention is reasonable. The rotation drive device can drive the upper bed frame to rotate 90° so that the upper bed frame is staggered from the lower bed frame.

[0064] The bottom surface of the foot support 14 is provided with a driven plate 18, and the driven plate 18 is provided with a sliding groove 113. The second end of the leg lifting link 17 is slidably connected to the sliding groove 113.

[0065] The slide 113 is provided on the driven plate 18 along the length of the leg lifting link 17.

[0066] The leg-lifting linkage 17 is lever-shaped.

[0067] The leg-raising linkage 17 includes a long rod section 171 and a short rod section 172 connected to each other. The length of the long rod section 171 is greater than the length of the short rod section 172. The end of the long rod section 171 is slidably connected to the slide groove 113, and the end of the short rod section 172 is rotatably connected to the telescopic end of the leg-raising drive device 15.

[0068] The present invention also includes a rotating mechanism 3, wherein the upper bed frame 1 is horizontally rotated on the lower bed frame 2 via the rotating mechanism 3. The rotating mechanism 3 includes a lower fixed plate 31 and an upper rotating plate 32. The upper rotating plate 32 is horizontally rotated on the top of the lower fixed plate 31, the upper bed frame 1 is mounted on the upper rotating plate 32, and the lower fixed plate 31 is mounted on the lower bed frame 2.

[0069] The lumbar support frame 12 has foldable guardrails 111 on both sides. The foldable guardrails can be flipped down and folded down to facilitate the transfer of patients on the nursing bed.

[0070] The backrest tilting drive 16 and the leg lifting drive 15 are push rod motors.

[0071] The working principle of this invention when the nursing bed is converted into a chair with a backrest to assist patients in getting in and out of bed is as follows: Initially, the patient lies on the upper bed frame. Then, the leg-lifting drive device 15 is activated, and the telescopic end of the leg-lifting drive device 15 extends. The first end of the leg-lifting link 17 rotates downward, and the second end of the leg-lifting link 17 slides at the bottom of the footrest 14, thereby causing the second end of the leg-lifting link 17 to rotate upward, which in turn causes the footrest 14 to rise. The lower leg support 13 also rotates upward. After the footrest 14 rises, the footrest 14 and the fixed bed frame 114 are vertically offset (the fixed bed frame 114 no longer interferes with the horizontal rotation of the footrest 14). At the same time, the backrest flipping drive device 16 drives the backrest frame 11 to rotate upward to a set angle, and the patient's back and legs are lifted.

[0072] Then, the rotary drive device 19 is activated, the push rod of the rotary drive device 19 extends, and the push rod of the rotary drive device 19 pushes the mounting frame 110 to rotate 90° clockwise horizontally. The mounting frame 110 drives the lumbar frame 12, backrest frame 11, lower leg frame 13 and footrest 14 to rotate 90° clockwise horizontally together. The patient on the upper bed frame rotates 90° horizontally along with it. Then, the telescopic end of the leg lifting drive device 15 retracts, the first end of the leg lifting linkage 17 rotates upward, driving the second end of the leg lifting linkage 17 to rotate downward, which in turn drives the footrest 14 to descend and rotate downward. The footrest drives the lower leg frame to rotate downward. Finally, the footrest 14 remains in a horizontal state, supporting the patient's feet. The lower leg frame 13 also rotates downward. At this time, the entire upper bed frame 1 becomes a backrest chair, the patient's posture on the upper bed frame 1 becomes a sitting posture, and the patient's feet are placed on the footrest 14. Afterwards, the two lifting mechanisms 4 drive the lower bed frame and the upper bed frame to descend, the telescopic end of the lifting drive device 41 extends, and the first lifting linkage 42 rotates downward, thereby driving the lower bed frame 2 and the upper bed frame 1 to descend, ultimately lowering the horizontal height of the backrest chair, and the footrest 14 is very close to the ground, at which point it is very easy for the patient to get out of bed.

[0073] The working principle of the leg lift of the present invention when lifting the patient's leg is as follows: When the leg lift of the present invention raises the patient's legs, the patient lies on the bed frame, the leg lift drive device 15 is activated, the telescopic end of the leg lift drive device 15 extends, the first end of the leg lift link 17 rotates downward, the second end of the leg lift link 17 rotates upward, the second end of the leg lift link 17 slides at the bottom of the foot support 14, thereby driving the foot support 14 to rise, and the lower leg support 13 also rotates upward. The lower leg support 13 and the foot support 14 lift the patient's legs, thereby facilitating the doctor or nurse to treat the patient, and can also change the patient's posture on the nursing bed, which helps the patient's body recover quickly.

[0074] This is a more detailed technical solution of the present invention.

[0075] The two lifting mechanisms 4 are arranged on the left and right between the lower bed frame 2 and the bottom bed frame 5. The two lifting mechanisms 4 drive the lower bed frame 2 to lift relative to the bottom bed frame 5. The lifting mechanism 4 includes a lifting drive device 41, a first lifting link 42 and a second lifting link 43. The fixed end of the lifting drive device 41 is rotatably connected to the lower bed frame 2, and the telescopic end of the lifting drive device 41 is rotatably connected to the middle of the first lifting link 42. The upper end of the first lifting link 42 is rotatably connected to the lower bed frame 2, and the lower end of the first lifting link 42 is rotatably connected to the bottom bed frame 5. The upper end of the second lifting link 43 is rotatably connected to the middle of the first lifting link 42, and the lower end of the second lifting link 43 is rotatably connected to the bottom bed frame 5. The two lifting mechanisms 4 of the present invention can drive the lower bed frame 2 to lift horizontally synchronously, or can independently control the heights of both sides of the lower bed frame 2 to meet the user's requirements for the tilt angle of the lower bed frame 2. The front and rear lifting can be independently controlled to ensure that both ends can be lifted in place. The front and rear lifting is independently controlled, which derives a function of rocking back and forth, which is helpful for some patients medically.

[0076] The two lifting mechanisms 4 are symmetrically arranged on the left and right between the lower bed frame 2 and the bottom bed frame 5.

[0077] The lifting drive device 41 is a push rod motor.

[0078] The first lifting link 42 is in the shape of a "day" character.

[0079] A horizontal rod 44 is provided in the middle of the first lifting link 42, and a connecting plate 45 is fixedly connected to the horizontal rod 44. The telescopic end of the lifting push rod motor is rotatably connected to the connecting plate 45.

[0080] The length of the second lifting link 43 is less than the length of the first lifting link 42.

[0081] The bottom of the lower bed frame 2 is provided with a fixed frame 115 extending to both sides thereof, and the lifting drive devices 41 of the two lifting mechanisms 4 are respectively arranged on the left and right sides of the fixed frame 115.

[0082] The lifting working principle of the present invention is as follows: When the lower bed frame 2 of the present invention rises, the telescopic ends of the lifting drive devices 41 of the two lifting mechanisms 4 are simultaneously driven to contract. The telescopic ends带动 the upper ends of the first lifting link 42 and the upper ends of the second lifting link 43 to rotate upward, thereby带动 the entire lower bed frame 2 to rise horizontally. The lifting of the left and right ends of the present invention can be independently controlled to ensure that the left and right ends of the bed frame can be lifted in place.

[0083] Conversely, when the lower bed frame 2 of the present invention descends, the lifting drive devices 41 of the two lifting mechanisms 4 simultaneously drive their telescopic ends to extend. The telescopic ends drive the upper ends of the first lifting link 42 and the upper ends of the second lifting link 43 to rotate downwards, thereby driving the entire lower bed frame 2 to descend horizontally. Of course, the two lifting mechanisms 4 of the present invention can work independently without interfering with each other. For example, the two lifting mechanisms 4 can also drive one end of the lower bed frame 2 to rise and the other end to fall, so that the lower bed frame 2 is in an inclined state, and the patient on the bed frame is also in an inclined state, which helps the blood circulation of the patient's feet.

[0084] This is a more specific technical solution of the present invention.

[0085] The bed frame includes a base frame 50, at least two front casters 52 and at least two rear casters 51. The at least two front casters 52 are located on one side of the base frame 50, and the at least two rear casters 51 are located on the other side of the base frame 50. The base frame 50 is characterized by having independent locking and releasing mechanisms 516 corresponding to the positions of the rear casters 51 and the front casters 52. A front drive shaft 53 is horizontally rotatable between the two front casters 52 on the base frame 50. The front drive shaft 53 is drive-connected to the locking and releasing mechanism 516 of the front casters 52. A rear drive shaft 56 is horizontally rotatable between the two rear casters 51 on the base frame 50. The rear drive shaft 56 is drive-connected to the locking and releasing mechanism 516 of the rear casters 51. The front drive shaft 53 and the rear drive shaft 56 are drive-connected through a synchronous transmission mechanism 54. At least one end of the front drive shaft 53 or the rear drive shaft 56 is fixedly connected to a locking and releasing handle 55. The braking control mechanisms of each caster are linked, so that pressing the brake at one point will lock or unlock all casters, avoiding the need to control each caster individually.

[0086] This is a more specific technical solution of the present invention.

[0087] The synchronous transmission mechanism 54 is located outside the base frame 50, which facilitates the installation and connection of the components of the synchronous transmission mechanism 54.

[0088] The synchronous transmission mechanism 54 includes a front transmission plate 541, a transmission rod 540, and a rear transmission plate 542. One end of the front transmission plate 541 is fixedly connected to the front transmission shaft 53, and the other end of the front transmission plate 541 is rotatably connected to the front end of the transmission rod 540. One end of the rear transmission plate 542 is fixedly connected to the rear transmission shaft 56 and the transmission rod 540, and the other end of the rear transmission plate 542 is rotatably connected to the rear end of the transmission rod 540. The locking and releasing handle 55 is lever-shaped, making it convenient for the user to step on it to lock and release the casters.

[0089] The middle part of the locking release handle 55 is fixedly connected to the end of the transmission component. The two ends of the locking release handle 55 will rotate relative to the middle part of the locking release handle 55. When one end of the locking release handle 55 is stepped on, the other end is raised, thereby making it convenient for the user to step on it, and thus locking and releasing the caster.

[0090] The front drive shaft 53 and the rear drive shaft 56 are located within the base frame 50. Therefore, the present invention has a simple structure and a neat appearance.

[0091] The front drive shaft 53 and the rear drive shaft 56 are hexagonal drive shafts. Therefore, the structural design of this invention is reasonable and facilitates transmission and connection.

[0092] The two corners on one side of the base frame 50 are provided with the front caster 52, and the two corners on the other side of the base frame 50 are provided with the rear caster 51.

[0093] The locking and releasing mechanism 516 includes a connecting cylinder 517, a caster seat 511, a locking and releasing cam 57, a roller 513, a spring 510, a lowering rod 59, and a locking block 58. The upper end of the connecting cylinder 517 is fixedly connected to the base frame 50. The caster seat 511 is rotatably mounted on the lower end of the connecting cylinder 517 about a vertical axis. The caster is rotatably mounted on the caster seat 511. The lowering rod 59 is vertically movable within the connecting cylinder 517. The roller 513 and the locking block 58 are respectively located at the upper and lower ends of the lowering rod 59. The locking and releasing cam 57 rotates... Located inside the connecting cylinder 517, the front drive rod 540 horizontally passes through the connecting cylinder 517 and the locking / releasing cam 57, and is connected to the locking / releasing cam 57 in a transmission manner. The spring 510 is sleeved on the lower pressure rod 59 and located inside the connecting cylinder 517. The upper and lower ends of the spring 510 abut against the top of the lower pressure rod 59 and the inner side wall of the connecting cylinder 517, respectively. The outer side wall of the locking / releasing cam 57 is provided with an arc-shaped limiting groove 512 and a release groove 515. The inner wall of the connecting cylinder 517 is provided with a rotation limiting block 514 corresponding to the position of the limiting groove 512.

[0094] The working principle of the interlocking casters of the nursing bed of this invention is as follows: When the user presses one end of the locking release handle 55, the locking release mechanism 516 locks the caster. The locking release handle 55 rotates forward, driving the front transmission rod 540 to rotate forward. The locking release cam 57 and the front transmission plate 541 rotate forward as well. The front transmission plate 541 drives the rear transmission plate 542 to rotate forward through the transmission rod 540. The rear transmission plate 542 drives the rear transmission shaft 56 to rotate forward. Therefore, the locking release cams 57 of the four locking release mechanisms 516 rotate forward synchronously. Due to the limiting cooperation between one end of the limiting groove 512 and the rotation limiting block 514, the locking release cam 57 and the locking release handle 55 stop rotating after rotating a certain angle. The roller 513 abuts against the outer wall of the locking release cam 57. The locking release cam 57 pushes the roller 513 downward. The pressing rod 59 and the locking block 58 descend together, the spring 510 is compressed, and the locking block 58 abuts against the caster. The locking block 58 locks the caster, and the caster cannot rotate.

[0095] Conversely, when the user presses the other end of the locking release handle 55, the locking release mechanism 516 releases the caster. The locking release handle 55 rotates in the opposite direction, causing the front transmission rod 540 to rotate in the opposite direction. The locking release cam 57 and the front transmission plate 541 then rotate in the opposite direction. The front transmission plate 541 drives the rear transmission plate 542 to rotate in the opposite direction via the transmission rod 540. The rear transmission plate 542 drives the rear transmission shaft 56 to rotate in the opposite direction. Therefore, the locking release cams 57 of the four locking release mechanisms 516 rotate in the opposite direction synchronously. Due to the limiting cooperation between the other end of the limiting groove 512 and the rotation limiting block 514, the locking release cam 57 and the locking release handle 55 stop rotating after rotating a certain angle. The spring 510 returns to its original state. Under the lifting action of the spring 510, the lower pressure rod 59 rises, the roller 513 slides into the release groove 515, and the locking block 58 also rises. The locking block 58 disengages from the caster, the caster is released, and the caster can rotate automatically.

Claims

1. A multifunctional nursing bed, comprising a headboard (6), an upper bed frame (1), a lower bed frame (2), and a base bed frame (5), wherein a mattress (8) is provided on the upper bed frame (1), the upper bed frame (1) is horizontally positioned on top of the lower bed frame (2), the upper bed frame (1) is rotatably positioned on top of the lower bed frame (2) with a vertical axis as its axis of rotation, the headboard (6) is located at one end of the lower bed frame (2), and the lower bed frame (2) is located on the base bed frame (5), characterized in that, It also includes a rotation drive device (19), which is mounted on the lower bed frame (2) and drives the upper bed frame (1) to rotate horizontally. The upper bed frame (1) includes a backrest frame (11), a lumbar support frame (12), a leg lift frame (10), a backrest flipping drive device (16), and a leg lift drive device (15). The backrest frame (11), the lumbar support frame (12), and the leg lift frame (10) are arranged horizontally on the lower bed frame (2) in sequence. (10) The backrest frame (11), waist frame (12) and leg lift frame (10) are hinged together in the horizontal direction. The waist frame (12) is horizontally rotated on the lower bed frame (2). The backrest frame (11) and leg lift frame (10) sit on the lower bed frame (2). The backrest flipping drive device (16) is located on the waist frame (12) and drives the backrest frame (11) to flip up and down. The leg lift drive device (15) is located on the waist frame (12) and drives the leg lift frame (10) to flip up and down.

2. The multifunctional nursing bed according to claim 1, characterized in that, The fixed end of the rotary drive device (19) is rotatably connected to the lower bed frame (2), the telescopic end of the rotary drive device (19) is rotatably connected to the lower bed frame (2), and the telescopic end of the rotary drive device (19) is eccentrically set with the rotating shaft of the upper bed frame (1).

3. The multifunctional nursing bed according to claim 1, characterized in that, The bottom of the waist frame (12) is fixedly connected to the mounting frame (110). The fixed end of the leg lifting drive device (15) is rotatably connected to one side of the mounting frame (110). The telescopic end of the leg lifting drive device (15) drives the leg lifting frame (10) to rotate. The fixed end of the backrest flipping drive device (16) is rotatably connected to the other side of the mounting frame (110). The telescopic end of the backrest drive device (16) is rotatably connected to the backrest frame (11).

4. The multifunctional nursing bed according to claim 1, characterized in that, It also includes a rotating mechanism (3). The upper bed frame (1) is horizontally rotated on the lower bed frame (2) by the rotating mechanism (3). The rotating mechanism (3) includes a lower fixed plate (31) and an upper rotating plate (32). The upper rotating plate (32) is horizontally rotated on the top of the lower fixed plate (31). The upper bed frame (1) is located on the upper rotating plate (32), and the lower fixed plate (31) is located on the lower bed frame (2).

5. The multifunctional nursing bed according to claim 1, characterized in that, The leg-raising frame (10) includes a lower leg frame (13), a leg-raising link (17), and a foot support frame (14). The waist frame (12), lower leg frame (13), and foot support frame (14) are arranged horizontally in sequence. The waist frame (12), lower leg frame (13), and foot support frame (14) are hinged in sequence. The waist frame (12), lower leg frame (13), and foot support frame (14) are aligned in the horizontal direction. The leg-raising link (17) is rotatably located at the bottom of the waist frame (12). The telescopic end of the leg-raising drive device (15) is rotatably connected to one end of the leg-raising link (17). The other end of the leg-raising link (17) is slidably connected to the foot support frame (14). The leg-raising drive device (15) is located at the bottom of the waist frame (12) and drives the foot support frame (14) to rotate up and down relative to the lower leg frame (13), thereby driving the lower leg frame (13) to rotate up and down.

6. The multifunctional nursing bed according to claim 5, characterized in that, The bottom surface of the support bracket (14) is provided with a driven plate (18), and the driven plate (18) is provided with a sliding groove (113). The second end of the leg lifting rod (17) is slidably connected to the sliding groove (113).

7. The multifunctional nursing bed according to claim 1 further includes two lifting mechanisms (4), which are arranged on the left and right between the lower bed frame (2) and the base bed frame (5). The two lifting mechanisms (4) drive the lower bed frame (2) to lift relative to the base bed frame (5). The lifting mechanism (4) includes a lifting drive device (41), a first lifting link (42) and a second lifting link (43). The fixed end of the lifting drive device (41) is rotatably connected to the lower bed frame (2), and the telescopic end of the lifting drive device (41) is rotatably connected to the middle part of the first lifting link (42). The upper end of the first lifting link (42) is rotatably connected to the lower bed frame (2), and the lower end of the first lifting link (42) is rotatably connected to the base bed frame (5). The upper end of the second lifting link (43) is rotatably connected to the middle part of the first lifting link (42), and the lower end of the second lifting link (43) is rotatably connected to the base bed frame (5). Two lifting mechanisms (4) can synchronously drive the lower bed frame (2) to rise and fall horizontally, or independently control the height of both sides of the lower bed frame (2) to meet the user's requirements for the tilt angle of the lower bed frame (2). The front and rear lifting can be controlled independently to ensure that both ends can be raised and lowered to the correct position. The independent control of the front and rear lifting also gives rise to a back and forth rocking function, which is helpful for some patients in medicine.

8. The multifunctional nursing bed according to claim 1, characterized in that, The bed frame (5) includes a base frame (50), at least two front casters (52) and at least two rear casters (51). The at least two front casters (52) are located on one side of the base frame (50), and the at least two rear casters (51) are located on the other side of the base frame (50). The base frame (50) is characterized by having independent locking and releasing mechanisms (516) corresponding to the positions of the rear casters (51) and the front casters (52). A front drive shaft (53) is provided on the base frame (50) that rotates horizontally between the two front casters (52). The rotating shaft (53) is connected to the locking release mechanism (516) of the front caster (52). The bottom frame (50) is provided with a rear drive shaft (56) that rotates horizontally between the two rear casters (51). The rear drive shaft (56) is connected to the locking release mechanism (516) of the rear caster (51). The front drive shaft (53) and the rear drive shaft (56) are connected by a synchronous transmission mechanism (54). At least one end of the front drive shaft (53) or the rear drive shaft (56) is fixedly connected to a locking release handle (55).

9. The multifunctional nursing bed according to claim 1, characterized in that, The rotation drive (19), the backrest flip drive (16), and the leg lift drive (15) are push rod motors.

10. A control method for the multifunctional nursing bed according to any one of claims 1-9, comprising: Step 1; The telescopic end of the leg-lifting drive device (15) extends, the first end of the leg-lifting link (17) rotates downward, and the second end of the leg-lifting link (17) slides at the bottom of the footrest (14), thereby driving the second end of the leg-lifting link (17) to rotate upward, thereby driving the footrest (14) to rise, and the lower leg frame (13) also rotates upward. After the footrest (14) rises, the footrest (14) and the fixed bed frame (114) on the lower bed frame (2) are vertically offset; at the same time, the backrest flipping drive device (16) drives the backrest frame (11) to rotate upward to the set angle, and the patient's back and legs are lifted. Step 2; Then, the push rod of the rotary drive device (19) extends, and the push rod of the rotary drive device (19) pushes the mounting bracket (110) to rotate to the set angle. The mounting bracket (110) drives the waist frame (12), backrest frame (11), calf frame (13) and foot support frame (14) to rotate together to the set angle. Step 3; then, the telescopic end of the leg lifting drive device (15) retracts, the first end of the leg lifting link (17) rotates upward, the second end of the leg lifting link (17) rotates downward, thereby driving the foot support (14) to descend and rotate downward, the foot support drives the lower leg support (13) to rotate downward, and the foot support (14) finally remains in a horizontal state. At this time, the entire upper bed frame (1) becomes a backrest chair.

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