A digital control intelligent nursing bed

Abstract

The present invention discloses a digital control intelligent nursing bed, which includes a lifting mechanism, a side-turning mechanism, a back-lifting mechanism, a leg-bending mechanism, a toilet device and a bed frame. Detection and correction components are provided for the corresponding electric push rods used to drive the side-turning mechanism, the back-lifting mechanism and the leg-bending mechanism. The nursing bed also includes a control system, and the control system is electrically connected to a magnetic induction proximity switch. The attitude conversion of the digital control intelligent nursing bed of the present invention is accurate. The setting of the side-turning mechanism helps patients prevent bedsores. The setting of the lifting mechanism meets the needs of traditional Chinese culture for rehabilitation physiotherapy and life care. The back-lifting mechanism of the present invention reduces the discomfort of patients during attitude conversion. The toilet device of the present invention has a compact structure. The nursing bed of the present invention can be remotely controlled by a mobile phone, which is beneficial for nursing staff to remotely monitor and assist patients in attitude conversion.

Description

Technical Field

[0001] The present invention relates to the field of nursing beds, and particularly to a digitally controlled intelligent nursing bed. Background Art

[0002] With the increasingly serious trend of population aging in many countries around the world today, developing a rentable, fully digital, Internet-based nursing bed suitable for virtual nursing homes, which extremely conveniently supports caregivers to preset personalized customization and supports remote assistance monitoring and adjusting the patient's posture change needs, has an automatic defecation assistance function, and meets the requirements of physical therapy and rehabilitation adjustment, will help solve the needs of the public's habit of home and community elderly care.

[0003] Existing nursing beds can achieve overall lifting and side-turning functions. The side-turning function helps prevent bedsores for patients. The lifting and side-turning postures of existing nursing beds are driven by medical electric push rods. Existing electric push rods usually can only achieve the conversion of the nursing bed posture in a jogging form, that is, by manually operating the jogging switch and determining the posture position of the nursing bed by the operator's visual inspection. In order to achieve the intelligent digital control of the nursing bed, when digitally and automatically controlling the telescopic length of these electric push rods through a single-chip microcomputer, there will be a problem of error accumulation, resulting in inaccurate posture positions of the nursing bed. Especially after the nursing bed repeatedly switches between the side-turning posture and the flat-bed posture many times, it is easy to cause inaccurate flat-bed positions, resulting in discomfort for patients. The above problems of existing nursing beds need to be solved urgently. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a digitally controlled intelligent nursing bed, which is beneficial to accurate posture conversion of the nursing bed.

[0005] The purpose of the present invention is achieved by the following technical solutions.

[0006] The disclosed digital control intelligent nursing bed of the present invention includes a bottom frame, a lifting mechanism, a lifting frame, a side-turning mechanism, and a bed frame for a person to lie on. The lifting frame is arranged above the bottom frame, and the lifting frame is connected to the bottom frame through the lifting mechanism. The lifting mechanism is provided with a lifting electric push rod, and the lifting electric push rod is drivingly connected to the lifting frame. The side-turning mechanism is provided with a side-turning frame, the middle of the side-turning frame is hinged to the lifting frame, the side-turning frame is supportingly connected to the bed frame, the side-turning mechanism is provided with a side-turning electric push rod, and the side-turning electric push rod is drivingly connected to the side-turning frame. Among them, it further includes a control system, and the control system is control-connected to the lifting electric push rod and the side-turning electric push rod; it further includes a detection and correction component for combining a limit switch of the electric push rod to enable the control system to perform digital calibration and identification on the displacement of the push rod of the electric push rod. The detection and correction component is provided with a magnet for being relatively fixed to the push rod of the electric push rod and a magnetic induction proximity switch for detecting the magnet within the stroke range of the push rod of the electric push rod. The magnetic induction proximity switch can correspond to the position of the magnet. The side-turning electric push rod is provided with the detection and correction component, and the control system is electrically connected to the magnetic induction proximity switch.

[0007] Preferably, the bed frame includes a back frame for correspondingly supporting the human back and a middle frame for correspondingly supporting the human buttocks; it further includes a back-lifting mechanism. The back-lifting mechanism includes a back-lifting electric push rod, a back-lifting driving arm, and a back-lifting support wheel. A sliding hinge point is provided at the rear of the middle frame. The front end of the back frame is hinged to the middle frame at the sliding hinge point. The side-turning frame is provided with a fifth hinge point. One end of the back-lifting driving arm is hinged to the side-turning frame at the fifth hinge point. The corresponding other end of the back-lifting driving arm is rotatably connected to the back-lifting support wheel. The back-lifting support wheel is in rolling connection with the bottom of the back frame. The side-turning frame is provided with a sixth hinge point. The back-lifting mechanism includes a limiting rod for moving the sliding hinge point to a rearward position when the back frame is in a sitting position. One end of the limiting rod is hinged to the side-turning frame at the sixth hinge point. The corresponding other end of the limiting rod is hinged to the back-lifting driving arm at a seventh hinge point. The seventh hinge point is arranged between the sliding hinge point and the back-lifting support wheel. The back-lifting electric push rod is drivingly connected to the back-lifting driving arm.

[0008] Preferably, the control system is control-connected to the back-lifting electric push rod, and the back-lifting electric push rod is provided with the detection and correction component.

[0009] Preferably, the distance between the position of the sliding hinge point corresponding to the flat-bed posture of the back frame and the position of the sliding hinge point corresponding to the sitting posture of the back frame is 5 cm to 8 cm.

[0010] Preferably, the bed frame includes a leg frame and a foot frame. The rear end of the leg frame is hinged to the front end of the middle frame, and the rear end of the foot frame is hinged to the front end of the leg frame. It further includes a curved leg mechanism which is provided with a curved leg driving arm. One end of the curved leg driving arm is hinged to the foot frame, and the other corresponding end is hinged to the middle frame. The curved leg driving arm is parallel to the leg frame. The curved leg mechanism is provided with a curved leg electric push rod. One end of the curved leg electric push rod is hinged to the curved leg driving arm, and the other corresponding end is hinged to the middle frame. The control system is controllably connected to the curved leg electric push rod, and the curved leg electric push rod is provided with the detection and correction assembly.

[0011] Preferably, it further includes a guardrail assembly which is provided with a first vertical railing, a second vertical railing, a positioning plate, a guardrail lock and a horizontal railing. The first vertical railing and the second vertical railing are respectively hinged to the lifting frame. One end of the horizontal railing is hinged to the first vertical railing, and the other corresponding end is hinged to the second vertical railing. The positioning plate is fixedly connected to the lifting frame. The guardrail lock is provided with a bolt and a return spring. The bolt is slidably connected to the second vertical railing, and the return spring is sleeved on the bolt. The positioning plate is formed with a positioning hole, and the bolt can be inserted into the positioning hole by the elastic force of the return spring. Guardrail assemblies are respectively provided on the left and right sides of the bed frame.

[0012] Preferably, a microswitch is correspondingly provided for the positioning hole, and the end of the bolt can trigger the microswitch by the elastic force of the return spring. The control system is electrically connected to the microswitch.

[0013] Preferably, the guardrail assembly is provided with an opening and closing guardrail. The end of the opening and closing guardrail is fixedly connected with a clamping sleeve which is adaptively sleeved on the second vertical railing. The opening and closing guardrail can swing around the second vertical railing, and the opening and closing guardrail is provided with a locking bolt kit for locking the opening and closing guardrail to the second vertical railing.

[0014] Preferably, a toilet device is further included. The toilet device is provided with a seat cushion, a seat cushion swing rod, a toilet pan, a first toilet pan swing rod, a second toilet pan swing rod, a toilet pan drive arm, a toilet pan connecting arm, and a toilet electric push rod for alternately positioning the seat cushion and the toilet pan. The lifting frame is fixedly connected with a toilet pan support. The toilet pan support is provided with a second hinge point and a third hinge point. One end of the first toilet pan swing rod is hinged to the toilet pan, and the other corresponding end of the first toilet pan swing rod is hinged to the toilet pan support at the second hinge point. One end of the second toilet pan swing rod is hinged to the toilet pan, and the other corresponding end of the second toilet pan swing rod is hinged to the toilet pan support at the third hinge point. The first toilet pan swing rod is parallel to the second toilet pan swing rod, and the toilet pan is horizontally arranged. The toilet pan support is provided with a fourth hinge point. One end of the seat cushion swing rod is fixedly connected with the seat cushion, and the other corresponding end of the seat cushion swing rod is hinged to the toilet pan support at the fourth hinge point. One end of the toilet pan drive arm is hinged to the toilet pan support at the fourth hinge point, and the toilet pan drive arm is fixedly connected with the seat cushion swing rod. The second toilet pan swing rod is provided with an eighth hinge point near the third hinge point. One end of the toilet pan connecting arm is hinged to the second toilet pan swing rod at the eighth hinge point. The other corresponding end of the toilet pan connecting arm is formed with a first long hole for relatively misaligned swinging of the seat cushion and the toilet pan. The other corresponding end of the toilet pan drive arm is slidably hinged to the first long hole through a corresponding pin shaft. The toilet electric push rod is drivingly connected to the toilet pan drive arm, and the control system is control-connected to the toilet electric push rod. The toilet device is provided with a toilet pan return spring for applying a moment in the downward return swinging direction of the first toilet pan swing rod to the first toilet pan swing rod. One end of the toilet pan return spring is connected to the lifting frame, and the other corresponding end of the toilet pan return spring is connected to the first toilet pan swing rod.

[0015] Preferably, a hand control box and a remote controller are further included. The hand control box is connected to the control system, and the remote controller is connected to the control system through a network.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: By providing a detection and correction component for combining a limit switch of an electric push rod to eliminate the cumulative error of the electric push rod, the detection and correction component is provided with a magnet for being relatively fixed to the push rod of the electric push rod and a magnetic induction proximity switch for detecting the magnet within the stroke range of the push rod of the electric push rod. The magnetic induction proximity switch can correspond to the position of the magnet. The side-turning electric push rod is provided with a detection and correction component, and a control system is provided to control and connect the lifting electric push rod and the side-turning electric push rod. The control system is electrically connected to the magnetic induction proximity switch; it is beneficial for the control system to correct the parameter deviation, thereby eliminating the cumulative error in the actual use process of the electric push rod, being beneficial for the accurate attitude conversion of the nursing bed, avoiding the structural failure of the nursing bed due to excessive cumulative error, and ensuring that the nursing bed can operate digitally and accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 6 is a schematic perspective view of the nursing bed of the present invention in the flat bed attitude.

[0018] Figure 2 FIG. 10 is a schematic perspective view of the nursing bed of the present invention in the sitting posture state.

[0019] Figure 3 FIG. 14 is a schematic perspective view of the nursing bed of the present invention in the back-lifting attitude.

[0020] Figure 4 FIG. 18 is a schematic perspective view of the nursing bed of the present invention in the side-turning attitude.

[0021] Figure 5 FIG. 22 is a schematic perspective view of the nursing bed of the present invention in the raised attitude.

[0022] Figure 6 FIG. 26 is a schematic view of the state of the bedpan of the nursing bed of the present invention in the working position.

[0023] Figure 7 FIG. 30 is a schematic diagram of the mechanism movement of the leg-curving mechanism of the present invention corresponding to the flat bed attitude of the nursing bed.

[0024] Figure 8 FIG. 34 is a schematic diagram of the mechanism movement of the leg-curving mechanism of the present invention corresponding to the leg-curving attitude of the nursing bed.

[0025] Figure 9 FIG. 38 is a schematic diagram of the mechanism movement of the back frame of the present invention corresponding to the flat bed attitude of the nursing bed.

[0026] Figure 10 FIG. 42 is a schematic diagram of the mechanism movement of the back frame of the present invention corresponding to the back-lifting attitude of the nursing bed.

[0027] Figure 11It is the mechanism kinematic diagram corresponding to the side-turning posture of the nursing bed of the side-turning frame of the present invention.

[0028] Figure 12 It is the mechanism kinematic diagram of the bottom frame, lifting mechanism and lifting frame combination of the present invention.

[0029] Figure 13 It is the front view structural schematic diagram of the toilet device of the present invention.

[0030] Figure 14 It is the mechanism kinematic diagram corresponding to the storage state of the toilet pan of the toilet device of the present invention.

[0031] Figure 15 It is the mechanism kinematic diagram corresponding to the initial downward swing state of the seat cushion of the toilet device of the present invention.

[0032] Figure 16 It is the mechanism kinematic diagram corresponding to the state where the toilet pan swings upward higher than the seat cushion of the toilet device of the present invention.

[0033] Figure 17 It is the left view structural schematic diagram of the guardrail assembly of the present invention.

[0034] Figure 18 It is the sectional view structural schematic diagram of the guardrail lock and positioning plate combination of the present invention.

[0035] Figure 19 It is the schematic diagram of the open state of the opening and closing guardrail of the present invention.

[0036] Figure 20 It is the partial sectional view structural schematic diagram of the side-turning electric push rod of the present invention.

[0037] Figure 21 It is the three-dimensional structural schematic diagram of the side-turning electric push rod of the present invention.

[0038] Figure 22 It is the wiring schematic diagram of the side-turning electric push rod of the present invention.

[0039] Figure 23 It is the control flow chart of the side-turning electric push rod of the present invention.

[0040] Figure 24 It is the control flow chart of the nursing bed of the present invention.

[0041] Figure 25 It is the control flow chart of the host computer of the present invention.

[0042] Figure 26 It is the sectional view structural schematic diagram of the locking pin kit of the present invention.

[0043] Description of reference numerals: 1 - bottom frame; 2 - lifting mechanism; 21 - lifting electric push rod; 22 - first lifting swing rod; 221 - first support wheel; 23 - second lifting swing rod; 231 - second support wheel; 3 - lifting frame; 31 - first hinge point; 32 - toilet pan bracket; 321 - second hinge point; 322 - third hinge point; 323 - fourth hinge point; 4 - bed frame; 41 - back frame; 411 - first railing frame; 42 - middle frame; 421 - second railing frame; 43 - leg frame; 431 - third railing frame; 44 - foot frame; 441 - fourth railing frame; 5 - guardrail assembly; 51 - first vertical railing; 52 - second vertical railing; 53 - positioning plate; 54 - guardrail lock; 541 - bolt; 542 - return spring; 55 - horizontal railing; 56 - opening and closing guardrail; 561 - clamping sleeve; 562 - locking bolt kit; 57 - micro switch; 6 - sitting toilet device; 61 - seat cushion; 611 - seat cushion swing rod; 62 - toilet pan; 63 - sitting toilet electric push rod; 64 - first toilet pan swing rod; 65 - second toilet pan swing rod; 651 - eighth hinge point; 66 - toilet pan drive arm; 67 - toilet pan connecting arm; 671 - first long hole; 68 - toilet pan return tension spring; 7 - backrest lifting mechanism; 71 - backrest lifting electric push rod; 72 - backrest drive arm; 721 - fifth hinge point; 73 - backrest support wheel; 74 - limiting rod; 741 - sixth hinge point; 742 - seventh hinge point; 75 - sliding hinge point; 8 - leg bending mechanism; 81 - leg bending electric push rod; 82 - leg bending drive arm; 9 - side turning frame; 90 - side turning mechanism; 91 - side turning electric push rod; 911 - housing; 912 - push rod; 913 - drive nut; 914 - lead screw; 915 - upper limit switch; 916 - lower limit switch; 917 - motor; Hall signal element 918; 92 - side turning top plate; 10 - detection and correction assembly; 101 - magnetic induction proximity switch; 102 - magnet; 103 - mounting sleeve; 104 - fixing screw; 1101 - first wiring terminal; 1102 - second wiring terminal; 1103 - third wiring terminal; 1104 - fourth wiring terminal; 1105 - fifth wiring terminal. Detailed implementation mode

[0044] The present invention will be further described below in conjunction with the accompanying drawings.

[0045] The nursing bed of the present invention, as Figure 1 and Figure 11 shown, includes a bottom frame 1, a lifting mechanism 2, a lifting frame 3, a side turning mechanism 90 and a bed frame 4 for a person to lie on. The lifting frame 3 is arranged above the bottom frame 1, as Figure 12As shown, the lifting frame 3 is connected to the bottom frame 1 through a lifting mechanism 2. Specifically, the lifting mechanism 2 includes a first lifting swing rod 22 and a second lifting swing rod 23. The middle of the first lifting swing rod 22 is hinged to the middle of the second lifting swing rod 23. The lower end of the first lifting swing rod 22 is hinged to the bottom frame 1. A first support wheel 221 is rotatably connected to the upper end of the first lifting swing rod 22. The upper end of the second lifting swing rod 23 is hinged to the lifting frame 3. A second support wheel 231 is rotatably connected to the lower end of the second lifting swing rod 23. The first support wheel 221 can roll on the bottom of the lifting frame 3, and the second support wheel 231 can roll on the bottom frame 1. The lifting mechanism 2 is provided with a lifting electric push rod 21, and the lifting electric push rod 21 is drivingly connected to the lifting frame 3. Specifically, one end of the lifting electric push rod 21 can be hinged to the first lifting swing rod 22, and the other corresponding end of the lifting electric push rod 21 is hinged to the bottom frame 1. Thus, when the lifting electric push rod 21 extends, the first lifting swing rod 22 swings upward. Since the middle of the first lifting swing rod 22 is hinged to the middle of the second lifting swing rod 23, the second lifting swing rod 23 also swings upward synchronously, causing the lifting frame 3 to rise. Figure 5 shows the rising posture of the lifting frame 3. When the lifting electric push rod 21 shortens, the lifting frame 3 descends. As Figure 2 , Figure 3 and Figure 11 shown, the tipping mechanism 90 is provided with a tipping frame 9. The middle of the tipping frame 9 is hinged to the lifting frame 3. Specifically, the lifting frame 3 is provided with a first hinge point 31. The middle of the tipping frame 9 in the left-right direction is hinged to the lifting frame 3 at the first hinge point 31. Thus, the tipping frame 9 can tip left or right relative to the lifting frame 3. The tipping frame 9 supports and connects the bed frame 4. The tipping mechanism 90 is provided with a tipping electric push rod 91, and the tipping electric push rod 91 is drivingly connected to the tipping frame 9. Specifically, one end of the tipping electric push rod 91 is hinged to the lifting frame 3, and the other corresponding end of the tipping electric push rod 91 is hinged to a connecting plate, and the above connecting plate is fixedly connected to the tipping frame 9. Thus, the tipping electric push rod 91 can drive the tipping frame 9 to swing around the first hinge point 31. Figure 4 shows the posture of the tipping frame 9 and the bed frame 4 tipping to the left together. By setting the above tipping function, it is avoided that the patient's back is pressed on the bed frame 4 for a long time, which helps the patient prevent bedsore. By setting the above lifting function, it meets the needs of traditional Chinese culture in rehabilitation physiotherapy and life care.

[0046] The nursing bed of the present invention further includes a control system. The control system may include a single-chip microcomputer. The control system is control-connected to the lifting electric push rod 21 and the tipping electric push rod 91; it further includes a detection and correction component 10 for digitally calibrating and identifying the displacement of the push rod 912 of the electric push rod in combination with the limit switch of the electric push rod. Figure 20The internal structure of the tipping electric push rod 91 of the present invention is shown by way of example. The detection and correction assembly 10 is provided with a magnet 102 for being relatively fixed with respect to the push rod 912 of the electric push rod and a magnetic induction proximity switch 101 for detecting the magnet 102 within the stroke range of the push rod 912 of the electric push rod. That is to say, the magnetic induction proximity switch 101 is not arranged at both ends of the stroke corresponding to the push rod 912. As Figure 20 shown, the electric push rod applied to the medical field in the prior art includes a housing 911, a push rod 912, a drive nut 913, a lead screw 914, an upper limit switch 915, a lower limit switch 916 and a motor 917. The motor 917 is drivingly connected to the lead screw 914 through a worm and worm gear reducer provided inside the housing 911. The drive nut 913 is slidably connected to the housing 911. The drive nut 913 is screwed to the lead screw 914. The inner end of the push rod 912 is fixedly connected to the drive nut 913 relatively. Thus, when the lead screw 914 rotates, the drive nut 913 can drive the push rod 912 to telescopically move; both the upper limit switch 915 and the lower limit switch 916 are mechanical touch protection switches. The upper limit switch 915 and the lower limit switch 916 can be triggered by the drive nut 913. However, the position where the drive nut 913 is located when successfully colliding and triggering the upper limit switch 915 or the lower limit switch 916 each time is unstable. Therefore, the control system cannot obtain the accurate position of the push rod 912 only through the existing upper limit switch 915 or lower limit switch 916. The magnetic induction proximity switch 101 can correspond to the position of the magnet 102. Specifically, the magnetic induction proximity switch 101 can be relatively fixedly installed on the housing 911. As Figure 21 shown, an installation sleeve 103 is appropriately provided on the housing 911. The material of the installation sleeve 103 is plastic. The installation sleeve 103 is fixed to the housing 911 through fixing screws 104. As Figure 20 and Figure 21 shown, the magnetic induction proximity switch 101 is fixed within the installation sleeve 103. The magnetic induction proximity switch 101 passes through the housing 911. The magnetic induction proximity switch 101 and the housing 911 can be sealed through hot melt adhesive. The magnet 102 can be relatively fixed on the drive nut 913. The tipping electric push rod 91 is provided with the detection and correction assembly 10. Since the position accuracy requirement of the lifting frame 3 is not high, the lifting electric push rod 21 can be not provided with the detection and correction assembly 10. The control system is electrically connected to the magnetic induction proximity switch 101.

[0047] The working principle of the detection and calibration component 10 of the present invention is as follows: When the control system controls the push rod 912 of the roll-over electric push rod 91 to move telescopically, when the magnet 102 moves to the position corresponding to the magnetic induction proximity switch 101, the magnetic induction proximity switch 101 is triggered, and the magnetic induction proximity switch 101 transmits a signal to the control system. Before leaving the factory, the present invention's nursing bed tests the total number of pulse signals emitted from the position where the push rod 912 retracts to the shortest position to the position where the magnetic induction proximity switch 101 is triggered (that is, the total number of pulse signals required for the push rod 912 to run from the position where the lower limit switch 916 is triggered to the position where the magnetic induction proximity switch 101 is triggered) multiple times, and takes an average value of the above total number of pulse signals as the standard parameter L; during the actual use of the nursing bed of the present invention, the control system reads the total number of pulse signals La required for the push rod 912 to run from the position where the lower limit switch 916 is triggered to the position where the magnetic induction proximity switch 101 is triggered each time. The control system compares La with the standard parameter L. If La is different from the standard parameter L, it adjusts the pulse signal output next time so that La is corrected to be the same as the standard parameter L. Figure 23 shows the flow schematic diagram of the control system combined with the detection and calibration component 10 to control the electric push rod. Figure 23 The "preset number of pulses" in it is the above-mentioned standard parameter L. Figure 23 The "detect corresponding position" in it is the position where the magnet 102 triggers the magnetic induction proximity switch 101. It can be set that the control system controls the push rod 912 to run from the position where the lower limit switch 916 is triggered to the position where the magnetic induction proximity switch 101 is triggered each time when the machine is powered on. Figure 22 Schematically shows the wiring diagram of the roll-over electric push rod 91. Among them, the first wiring terminal 1101 is connected to the computer reading-level power supply, the originally provided Hall signal element 918 of the electric push rod is connected to the computer identification port through the second wiring terminal 1102, the third wiring terminal 1103 is connected to the positive power supply, the fourth wiring terminal 1104 is connected to the computer identification port, and the fifth wiring terminal 1105 is grounded. By setting the above detection and calibration component 10 combined with the corresponding program control of the control system, it not only ensures that the control system corrects the parameter deviation during each operation, thus eliminating the cumulative error in the actual use of the electric push rod, which is beneficial to the accurate attitude conversion of the nursing bed, but also can eliminate the risk of excessive discreteness of the product error of the electric push rod manufacturer, avoiding the structural failure of the nursing bed due to excessive cumulative error, and ensuring that the nursing bed can achieve digital and accurate operation.

[0048] Furthermore, as Figure 2 shown, the bed frame 4 includes a back frame 41 for correspondingly supporting the human back and a middle frame 42 for correspondingly supporting the human buttocks; as Figure 9As shown, it further includes a back-lifting mechanism 7. The back-lifting mechanism 7 includes a back-lifting electric push rod 71, a back-lifting driving arm 72 and a back-lifting support wheel 73. A sliding hinge point 75 is provided at the rear of the middle frame 42. The front end of the back frame 41 is hinged to the middle frame 42 at the sliding hinge point 75, and the middle frame 42 is relatively fixed to the roll-over frame 9. The roll-over frame 9 is provided with a fifth hinge point 721. One end of the back-lifting driving arm 72 is hinged to the roll-over frame 9 at the fifth hinge point 721. The other corresponding end of the back-lifting driving arm 72 is rotatably connected to the back-lifting support wheel 73. The back-lifting support wheel 73 is in rolling connection with the bottom of the back frame 41. The roll-over frame 9 is provided with a sixth hinge point 741. The back-lifting mechanism 7 includes a limiting rod 74 for making the sliding hinge point 75 located at a rear-shifted position when the back frame 41 is in a sitting position. One end of the limiting rod 74 is hinged to the roll-over frame 9 at the sixth hinge point 741, and the other corresponding end of the limiting rod 74 is hinged to the back-lifting driving arm 72 at a seventh hinge point 742. As Figure 9 shown, the seventh hinge point 742 is arranged between the sliding hinge point 75 and the back-lifting support wheel 73. The back-lifting electric push rod 71 is drivingly connected to the back-lifting driving arm 72. Specifically, one end of the back-lifting electric push rod 71 can be hinged to the roll-over frame 9. The back-lifting driving arm 72 can be relatively fixedly connected to a corresponding swing arm. The other corresponding end of the back-lifting electric push rod 71 is hinged to the above swing arm. Since the main function of the back-lifting electric push rod 71 is to make the back-lifting driving arm 72 swing around the fifth hinge point 721, so Figure 9 and Figure 10 the back-lifting electric push rod 71 is not drawn. Figure 9 In the flat-bed posture of the back frame 41 in , when the back-lifting electric push rod 71 drives the back-lifting driving arm 72 to swing upward, the back-lifting support wheel 73 supports and pushes the rear part of the back frame 41 to move upward. Since the back-lifting support wheel 73 generates a forward component force on the back frame 41, the sliding hinge point 75 first moves forward. When the sixth hinge point 741, the sliding hinge point 75 and the seventh hinge point 742 are in the same straight line, the sliding hinge point 75 stops moving forward. As Figure 10 shown, when the back frame 41 continues to swing upward, it will cause the sliding hinge point 75 to change to a backward shift. That is to say, by setting the limiting rod 74, the continuous forward shift of the sliding hinge point 75 is restricted, and finally the sliding hinge point 75 moves backward when the back frame 41 is in the Figure 3 and Figure 11 shown sitting posture state. Through the above settings, when the back frame 41 is converted from the flat-bed posture to the sitting posture, the lower part of the back frame 41 has a backward movement, thereby reducing the pressing force of the back frame 41 on the patient's back and thus reducing the discomfort of the patient during the posture conversion process.

[0049] Further, the control system controls the connection of the back-lifting electric push rod 71. The back-lifting electric push rod 71 is provided with a detection and correction component 10. The principle of the back-lifting electric push rod 71 is the same as that of the roll-over electric push rod 91. Therefore, for the wiring of the back-lifting electric push rod 71, please refer to Figure 22 , through the above settings, it is beneficial to make the flat-bed attitude position of the back frame 41 accurate.

[0050] Further, the position of the sliding hinge point 75 corresponding to the flat-bed attitude of the back frame 41 is 5 cm to 8 cm away from the position of the sliding hinge point 75 corresponding to the sitting posture of the back frame 41. In other words, when the corresponding back frame 41 Figure 9 converts from the posture shown to Figure 10 the posture shown, the sliding hinge point 75 moves backward by 5 cm to 8 cm, so that the backward movement amount of the lower part of the back frame 41 is appropriate, which can not only keep the back frame 41 effectively support and hold the patient's back during the posture conversion, but also reduce the discomfort of the patient during the posture conversion.

[0051] Further, as shown in Figure 2 , the bed frame 4 includes a leg frame 43 and a foot frame 44. As shown in Figure 7 , the rear end of the leg frame 43 is hinged to the front end of the middle frame 42, and the rear end of the foot frame 44 is hinged to the front end of the leg frame 43; it further includes a leg-bending mechanism 8. The leg-bending mechanism 8 is provided with a leg-bending driving arm 82. One end of the leg-bending driving arm 82 is hinged to the foot frame 44, and the other corresponding end of the leg-bending driving arm 82 is hinged to the middle frame 42. The leg-bending driving arm 82 is parallel to the leg frame 43. The leg-bending mechanism 8 is provided with a leg-bending electric push rod 81. One end of the leg-bending electric push rod 81 is hinged to the leg-bending driving arm 82, and the other corresponding end of the leg-bending electric push rod 81 is hinged to the middle frame 42. The control system controls the connection of the leg-bending electric push rod 81, and the leg-bending electric push rod 81 is provided with a detection and correction component 10. Figure 2 shows the sitting posture state of the nursing bed of the present invention. The patient can sit on the middle frame 42, and the soles of the patient's feet are supported by the foot frame 44. The leg-bending driving arm 82 and the leg frame 43 form a parallelogram mechanism. Therefore, in the state shown in Figure 7 , the foot frame 44 is in a horizontal position. And by lowering the leg frame 43 through the leg-bending electric push rod 81, as shown in Figure 8 , the foot frame 44 can still remain horizontal. By setting that the leg-bending electric push rod 81 is provided with a detection and correction component 10, it is beneficial to make the flat-bed attitude positions of the leg frame 43 and the foot frame 44 accurate.

[0052] Further, as shown in Figure 4As shown, the left and right ends of the back frame 41 can be respectively hinged with a first railing frame 411, the left and right ends of the middle frame 42 are respectively hinged with a second railing frame 421, the left and right ends of the leg frame 43 are respectively hinged with a third railing frame 431, and the left and right ends of the foot frame 44 are respectively hinged with a fourth railing frame 441. As Figure 11 shown, the lifting frame 3 is fixedly connected with side-turning top plates 92 respectively at positions corresponding to the lower sides of the first railing frames 411. Since the first railing frames 411 are limited and can only be folded upward relative to the back frame 41, thus Figure 9 one of the first railing frames 411 on the left side can be held by the corresponding side-turning top plate 92 and folded upward when the bed frame 4 turns over to the left side, while one of the first railing frames 411 on the right side remains parallel to the back frame 41. Similarly, side-turning top plates 92 are correspondingly provided at the lower sides of the second railing frames 421. The front ends of the second railing frames 421 are hinged with the rear ends of the third railing frames 431, and the front ends of the third railing frames 431 are hinged with the rear ends of the fourth railing frames 441. Thus, when the second railing frames 421 are folded upward relative to the middle frames 42, as Figure 4 shown, the second railing frames 421 can drive the third railing frames 431 and the fourth railing frames 441 to be folded upward synchronously. Thus, in the side-turning posture of the nursing bed of the present invention, the first railing frames 411, the second railing frames 421, the third railing frames 431 and the fourth railing frames 441 can respectively support and limit the body parts of the patient, thereby preventing the patient from rolling off.

[0053] Furthermore, as Figure 1 shown, it further includes a guardrail assembly 5. As Figure 17 shown, the guardrail assembly 5 is provided with a first vertical railing 51, a second vertical railing 52, a positioning plate 53, a guardrail lock 54 and a horizontal railing 55. The first vertical railing 51 and the second vertical railing 52 are respectively hinged with the lifting frame 3. One end of the horizontal railing 55 is hinged with the first vertical railing 51, and the other corresponding end of the horizontal railing 55 is hinged with the second vertical railing 52. The positioning plate 53 is fixedly connected with the lifting frame 3. As Figure 18 shown, the guardrail lock 54 is provided with a bolt 541 and a return spring 542. The bolt 541 is slidably connected with the second vertical railing 52. The return spring 542 is sleeved on the bolt 541. The positioning plate 53 is formed with a positioning hole. The bolt 541 can be inserted into the positioning hole by the elastic force of the return spring 542. That is to say, in Figure 17 the raised state of the guardrail assembly 5 shown, the bolt 541 is inserted into the above-mentioned positioning hole. Thus, the second vertical railing 52 cannot swing in Figure 18 the corresponding state shown. As Figure 18As shown in the figure, a plastic ball handle can be fixedly connected to the outer end of the bolt 541, which is convenient for manual gripping and operation. When the bolt 541 is pulled out of the above-mentioned positioning hole by hand and the second vertical railing 52 is swung downward by hand, the guardrail assembly 5 can be folded down and retracted. When the guardrail assembly 5 is reset and raised by hand, the bolt 541 is aligned with the above-mentioned positioning hole, and the elastic force of the return spring 542 inserts the bolt 541 into the above-mentioned positioning hole. Guardrail assemblies 5 are respectively provided on the left and right sides of the bed frame 4. Figure 1 One set of guardrail assembly 5 on the right side of the bed frame 4 in [reference] is in the state of being folded down and retracted. Since the guardrail assembly 5 can be folded down and retracted, it is convenient for the caregiver to care for the patient. When the guardrail assembly 5 is in the raised state, the patient can also lean on the horizontal railing 55 to rest. By setting the guardrail lock 54 in combination with the positioning plate 53, the guardrail assembly 5 needs to be intervened by hand to be opened, avoiding the patient falling from the bed frame 4.

[0054] Furthermore, as Figure 18 shown, a microswitch 57 is correspondingly provided for the positioning hole, and the end of the bolt 541 can trigger the microswitch 57 through the elastic force of the return spring 542. The control system is electrically connected to the microswitch 57. That is to say, when the elastic force of the return spring 542 inserts the bolt 541 into the above-mentioned positioning hole, the bolt 541 triggers the microswitch 57. Figure 24 The control flow of the nursing bed of the present invention is shown. When the microswitch 57 is triggered and kept on, that is, when all the guardrail assemblies 5 are in the raised state, the control system will execute various actions to drive the nursing bed. Through the above settings, the use safety of the nursing bed of the present invention is greatly improved, avoiding the patient from rolling out of the nursing bed when the bed frame 4 overturns.

[0055] Furthermore, as Figure 17 shown, the guardrail assembly 5 is provided with an opening and closing guardrail 56. Specifically, the opening and closing guardrail 56 is arranged in front of the horizontal railing 55. A clamping sleeve 561 is fixedly connected to the end of the opening and closing guardrail 56. The clamping sleeve 561 is adaptively sleeved on the second vertical railing 52. The opening and closing guardrail 56 can swing around the second vertical railing 52. The opening and closing guardrail 56 is provided with a locking bolt kit 562 for locking the opening and closing guardrail 56 to the second vertical railing 52. The structure of the locking bolt kit 562 is as Figure 26 shown. The locking bolt kit 562 can adopt the products of the prior art. The housing of the locking bolt kit 562 is relatively fixed to the opening and closing guardrail 56. The bolt inside the locking bolt kit 562 can be inserted into the corresponding hole of the second vertical railing 52. When the bolt of the locking bolt kit 562 is pulled out of the second vertical railing 52, the opening and closing guardrail 56 can swing. Figure 19Shows the open state where the opening and closing guardrail 56 swings outwards to a position perpendicular to the second vertical railing 52. By setting the above-mentioned opening and closing guardrail 56, it is beneficial to flexibly convert the protection form of the guardrail assembly 5, facilitating the operation of nursing staff to meet the requirements of multi-function. It should be noted that, as Figure 1 shown, a set of guardrail assemblies 5 on the right side of the nursing bed may not be provided with the opening and closing guardrail 56.

[0056] Furthermore, as Figure 1 , Figure 6 and Figure 13 shown, it also includes a toilet device 6. The toilet device 6 is provided with a seat cushion 61, a seat cushion swing rod 611, a toilet pan 62, a first toilet pan swing rod 64, a second toilet pan swing rod 65, a toilet pan drive arm 66, a toilet pan connecting arm 67, and a toilet electric push rod 63 for alternately positioning the seat cushion 61 and the toilet pan 62. The lifting frame 3 is fixedly connected with a toilet pan support 32. The toilet pan support 32 is provided with a second hinge point 321 and a third hinge point 322. One end of the first toilet pan swing rod 64 is hinged to the toilet pan 62, and the corresponding other end of the first toilet pan swing rod 64 is hinged to the toilet pan support 32 at the second hinge point 321. One end of the second toilet pan swing rod 65 is hinged to the toilet pan 62, and the corresponding other end of the second toilet pan swing rod 65 is hinged to the toilet pan support 32 at the third hinge point 322. The first toilet pan swing rod 64 is parallel to the second toilet pan swing rod 65. The toilet pan 62 is horizontally arranged. The toilet pan support 32 is provided with a fourth hinge point 323. One end of the seat cushion swing rod 611 is fixedly connected to the seat cushion 61, and the corresponding other end of the seat cushion swing rod 611 is hinged to the toilet pan support 32 at the fourth hinge point 323. One end of the toilet pan drive arm 66 is hinged to the toilet pan support 32 at the fourth hinge point 323, and the toilet pan drive arm 66 is fixedly connected to the seat cushion swing rod 611. The second toilet pan swing rod 65 is provided with an eighth hinge point 651 near the third hinge point 322. One end of the toilet pan connecting arm 67 is hinged to the second toilet pan swing rod 65 at the eighth hinge point 651. The corresponding other end of the toilet pan connecting arm 67 is formed with a first long hole 671 for relatively misaligned swinging of the seat cushion 61 and the toilet pan 62. The corresponding other end of the toilet pan drive arm 66 is slidably hinged to the first long hole 671 through a corresponding pin shaft. The toilet electric push rod 63 is drivingly connected to the toilet pan drive arm 66, and the control system is controllably connected to the toilet electric push rod 63. Specifically, the function of the toilet electric push rod 63 is to swing the toilet pan drive arm 66 around the fourth hinge point 323. As Figure 13 shown, one end of the toilet electric push rod 63 can be hinged to the toilet pan support 32, and the corresponding other end of the toilet electric push rod 63 is hinged to the toilet pan drive arm 66. Figure 14 The state shown corresponds to Figure 1 . When the toilet pan 62 needs to be used, as Figure 14As shown, the toilet electric push rod 63 drives the toilet pan drive arm 66 to swing counterclockwise. Then, the seat cushion 61 follows and swings downward simultaneously. Since the first long hole 671 slides relative to the corresponding pin shaft, during the initial counterclockwise swing of the toilet pan drive arm 66, the pin shaft connected to the end of the toilet pan drive arm 66 fails to exert an effective upward pulling force on the second toilet pan swing rod 65. Thus, as Figure 15 shown, even when the downward swing amplitude of the seat cushion 61 is relatively large, the upward clockwise swing amplitude of the toilet pan 62 is very small. Therefore, the seat cushion 61 will not touch the toilet pan 62. As Figure 16 shown, when the toilet pan drive arm 66 continues to swing counterclockwise, the pin shaft connected to the end of the toilet pan drive arm 66 runs to the upper end of the first long hole 671. Then, the pin shaft connected to the end of the toilet pan drive arm 66 can pull the toilet pan connecting arm 67, and the toilet pan connecting arm 67 simultaneously pulls the second toilet pan swing rod 65 to make the second toilet pan swing rod 65 swing clockwise. Since the eighth hinge point 651 is close to the third hinge point 322, a small upward displacement of the toilet pan connecting arm 67 can drive the second toilet pan swing rod 65 to swing significantly clockwise. And since the first toilet pan swing rod 64 and the second toilet pan swing rod 65 form a parallelogram mechanism, the toilet pan 62 can be kept swinging upward horizontally to Figure 6 the state shown. Therefore, it can be said that the toilet pan 62 and the seat cushion 61 swing relatively out of position. Although the working positions of the toilet pan 62 and the seat cushion 61 are close to overlapping, by setting the above-mentioned toilet device 6, the alternation of the working positions of the toilet pan 62 and the seat cushion 61 can still be completed. And the toilet device 6 only uses one toilet electric push rod 63 to complete the replacement of the working positions of the toilet pan 62 and the seat cushion 61, making the whole toilet device 6 structurally compact. Compared with the prior art, the toilet device 6 of the present invention is more adaptable to the complex structure of the nursing bed. Especially when the bed frame 4 of the nursing bed has a side-turning function, due to the limitation of the height of the bed frame 4, setting the toilet device 6 at the same time has progressiveness compared with the prior art.

[0057] Further, the toilet device 6 is provided with a toilet pan return spring 68 for applying a moment along the downward return swing direction of the first toilet pan swing rod 64 to the first toilet pan swing rod 64. One end of the toilet pan return spring 68 is connected to the lifting frame 3, and the other corresponding end of the toilet pan return spring 68 is connected to the first toilet pan swing rod 64. By setting the toilet pan return spring 68, during the downward return swing process of the toilet pan 62, referring to the relative position relationship between the seat cushion 61 and the toilet pan 62 in Figure 15 , the pin shaft connected to the end of the toilet pan drive arm 66 is made to abut against the upper end of the first long hole 671 by the pulling force of the toilet pan return spring 68. That is to say, it ensures the downward return swing amplitude of the toilet pan 62 to avoid collision between the toilet pan 62 and the seat cushion 61.

[0058] Furthermore, the nursing bed of the present invention further includes a hand control box and a remote controller. The hand control box is connected to the control system, and the remote controller is connected to the control system through a network. The above control system belongs to the lower computer, and the hand control box and the remote controller belong to the upper computer. The hand control box can be provided with several buttons for point - type control of each electric push rod of the present invention. Setting up the hand control box is beneficial for facilitating on - site operation and control of the nursing bed by nursing staff or allowing the elderly to operate it by themselves. Specifically, the remote controller can be a mobile phone installed with an APP capable of monitoring and controlling the nursing bed of the present invention. In other words, a mobile phone terminal with permission can control multiple nursing beds. It doesn't necessarily have to run in a preset mode, and can also monitor the real - time status of each nursing bed in real - time and can control the nursing bed individually. Under a network environment, the nurse - specific mobile phone APP and centralized monitoring can both achieve preset editing and operation of one or more appropriate module modes. The content of the above module mode can include the specific angular positions of each posture of the nursing bed of the present invention and the execution duration of posture transformation. Figure 25 The control flow chart of the mobile phone as the upper computer is shown. Thus, it is beneficial for the family members of the patient to monitor and control the nursing bed of the present invention, which is beneficial for nursing staff to remotely monitor and assist the patient in posture conversion. The above hand control box and remote controller can both be realized through existing technologies (not limited to the existing nursing bed technology field).

[0059] As can be seen from the above, the nursing bed of the present invention can achieve intelligent digital control.

Claims

1. A digital control intelligent nursing bed, comprising a bottom frame (1), a lifting mechanism (2), a lifting frame (3), a side-turning mechanism (90) and a bed frame (4) for a person to lie on. The lifting frame (3) is arranged above the bottom frame (1). The lifting frame (3) is connected to the bottom frame (1) through the lifting mechanism (2). The lifting mechanism (2) is provided with a lifting electric push rod (21), and the lifting electric push rod (21) is drivingly connected to the lifting frame (3). The side-turning mechanism (90) is provided with a side-turning frame (9). The middle of the side-turning frame (9) is hinged to the lifting frame (3). The side-turning frame (9) is supported and connected to the bed frame (4). The side-turning mechanism (90) is provided with a side-turning electric push rod (91), and the side-turning electric push rod (91) is drivingly connected to the side-turning frame (9). It is characterized in that: It further comprises a control system, and the control system is control-connected to the lifting electric push rod (21) and the side-turning electric push rod (91); it further comprises a detection and correction component (10) for combining a limit switch of the electric push rod to enable the control system to perform digital calibration and identification on the displacement of the push rod (912) of the electric push rod. The detection and correction component (10) is provided with a magnet (102) for being relatively fixed to the push rod (912) of the electric push rod and a magnetic induction proximity switch (101) for detecting the magnet (102) within the stroke range of the push rod (912) of the electric push rod. The magnetic induction proximity switch (101) can correspond to the position of the magnet (102). The side-turning electric push rod (91) is provided with the detection and correction component (10), and the control system is electrically connected to the magnetic induction proximity switch (101); It further includes a toilet device (6), the toilet device (6) is provided with a seat cushion (61), a seat cushion swing rod (611), a toilet pan (62), a first toilet pan swing rod (64), a second toilet pan swing rod (65), a toilet pan drive arm (66), a toilet pan connecting arm (67) and a toilet electric push rod (63) for alternately operating the positions of the seat cushion (61) and the toilet pan (62). The lifting frame (3) is fixedly connected with a toilet pan support (32), the toilet pan support (32) is provided with a second hinge point (321) and a third hinge point (322). One end of the first toilet pan swing rod (64) is hinged to the toilet pan (62), and the corresponding other end of the first toilet pan swing rod (64) is hinged to the toilet pan support (32) at the second hinge point (321). One end of the second toilet pan swing rod (65) is hinged to the toilet pan (62), and the corresponding other end of the second toilet pan swing rod (65) is hinged to the toilet pan support (32) at the third hinge point (322). The first toilet pan swing rod (64) is parallel to the second toilet pan swing rod (65), the toilet pan (62) is horizontally arranged. The toilet pan support (32) is provided with a fourth hinge point (323). One end of the seat cushion swing rod (611) is fixedly connected with the seat cushion (61), and the corresponding other end of the seat cushion swing rod (611) is hinged to the toilet pan support (32) at the fourth hinge point (323). One end of the toilet pan drive arm (66) is hinged to the toilet pan support (32) at the fourth hinge point (323), and the toilet pan drive arm (66) is fixedly connected with the seat cushion swing rod (611). The second toilet pan swing rod (65) is provided with an eighth hinge point (651) at a position close to the third hinge point (322). One end of the toilet pan connecting arm (67) is hinged to the second toilet pan swing rod (65) at the eighth hinge point (651), and the corresponding other end of the toilet pan connecting arm (67) is formed with a first long hole (671) for relatively misaligned swinging of the seat cushion (61) and the toilet pan (62). The corresponding other end of the toilet pan drive arm (66) is slidably hinged to the first long hole (671) through a corresponding pin shaft. The toilet electric push rod (63) is drivingly connected to the toilet pan drive arm (66), the control system is control-connected to the toilet electric push rod (63). The toilet device (6) is provided with a toilet pan return spring (68) for applying a moment along the downward return swing direction of the first toilet pan swing rod (64) to the first toilet pan swing rod (64). One end of the toilet pan return spring (68) is connected to the lifting frame (3), and the corresponding other end of the toilet pan return spring (68) is connected to the first toilet pan swing rod (64).

2. The digital control intelligent nursing bed according to claim 1, characterized in that: The bed frame (4) includes a back frame (41) for correspondingly supporting the human back and a middle frame (42) for correspondingly supporting the human buttocks; it further includes a back-lifting mechanism (7), and the back-lifting mechanism (7) includes a back-lifting electric push rod (71), a back-lifting driving arm (72) and a back-lifting support wheel (73). A sliding hinge point (75) is provided at the rear part of the middle frame (42). The front end of the back frame (41) is hinged to the middle frame (42) at the sliding hinge point (75). The side-turning frame (9) is provided with a fifth hinge point (721). One end of the back-lifting driving arm (72) is hinged to the side-turning frame (9) at the fifth hinge point (721). The corresponding other end of the back-lifting driving arm (72) is rotatably connected to the back-lifting support wheel (73). The back-lifting support wheel (73) is in rolling connection with the bottom of the back frame (41). The side-turning frame (9) is provided with a sixth hinge point (741). The back-lifting mechanism (7) includes a limiting rod (74) for making the sliding hinge point (75) located at a rear-shifted position when the back frame (41) is in a sitting posture. One end of the limiting rod (74) is hinged to the side-turning frame (9) at the sixth hinge point (741). The corresponding other end of the limiting rod (74) is hinged to the back-lifting driving arm (72) at a seventh hinge point (742). The seventh hinge point (742) is arranged between the sliding hinge point (75) and the back-lifting support wheel (73). The back-lifting electric push rod (71) is drivingly connected to the back-lifting driving arm (72).

3. The digital control intelligent nursing bed according to claim 2, characterized in that: The control system is control-connected to the back-lifting electric push rod (71), and the back-lifting electric push rod (71) is provided with the detection and correction assembly (10).

4. The digital control intelligent nursing bed according to claim 2, characterized in that: The distance between the position of the sliding hinge point (75) corresponding to the flat-bed posture of the back frame (41) and the position of the sliding hinge point (75) corresponding to the sitting posture of the back frame (41) is 5 cm to 8 cm.

5. The digital control intelligent nursing bed according to claim 2, characterized in that: The bed frame (4) includes a leg frame (43) and a foot frame (44). The rear end of the leg frame (43) is hinged to the front end of the middle frame (42), and the rear end of the foot frame (44) is hinged to the front end of the leg frame (43). It further includes a leg bending mechanism (8). The leg bending mechanism (8) is provided with a leg bending driving arm (82). One end of the leg bending driving arm (82) is hinged to the foot frame (44), and the other corresponding end of the leg bending driving arm (82) is hinged to the middle frame (42). The leg bending driving arm (82) is parallel to the leg frame (43). The leg bending mechanism (8) is provided with a leg bending electric push rod (81). One end of the leg bending electric push rod (81) is hinged to the leg bending driving arm (82), and the other corresponding end of the leg bending electric push rod (81) is hinged to the middle frame (42). The control system is controllably connected to the leg bending electric push rod (81), and the leg bending electric push rod (81) is provided with the detection and correction assembly (10).

6. The digital control intelligent nursing bed according to claim 1, characterized in that: it further includes a guardrail assembly (5). The guardrail assembly (5) is provided with a first vertical railing (51), a second vertical railing (52), a positioning plate (53), a guardrail lock (54) and a horizontal railing (55). The first vertical railing (51) and the second vertical railing (52) are respectively hinged to the lifting frame (3). One end of the horizontal railing (55) is hinged to the first vertical railing (51), and the other corresponding end of the horizontal railing (55) is hinged to the second vertical railing (52). The positioning plate (53) is fixedly connected to the lifting frame (3). The guardrail lock (54) is provided with a bolt (541) and a return spring (542). The bolt (541) is slidably connected to the second vertical railing (52). The return spring (542) is sleeved on the bolt (541). The positioning plate (53) is formed with a positioning hole. The bolt (541) can be inserted into the positioning hole by the elastic force of the return spring (542). The guardrail assemblies (5) are respectively provided on the left and right sides of the bed frame (4).

7. The digital control intelligent nursing bed according to claim 6, characterized in that: a microswitch (57) is correspondingly provided for the positioning hole. The end of the bolt (541) can trigger the microswitch (57) by the elastic force of the return spring (542). The control system is electrically connected to the microswitch (57).

8. The digital control intelligent nursing bed according to claim 6, characterized in that: The guardrail assembly (5) is provided with an opening and closing guardrail (56). A clamping sleeve (561) is fixedly connected to the end of the opening and closing guardrail (56). The clamping sleeve (561) is adaptively sleeved on the second vertical railing (52). The opening and closing guardrail (56) can swing around the second vertical railing (52). The opening and closing guardrail (56) is provided with a locking bolt kit (562) for locking the opening and closing guardrail (56) with the second vertical railing (52).

9. The digital control intelligent nursing bed according to claim 1, characterized in that: it further includes a hand control box and a remote controller. The hand control box is connected to the control system, and the remote controller is connected to the control system through a network.

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