Multifunctional medical bed

Abstract

A multifunctional medical bed, comprising a base (1) and a bed body assembly. A first lifting stand column (3) is fixed to one end of the base (1), and a second lifting stand column (4) and a third lifting stand column (5) are fixed to the other end of the base. A first bed frame mounting rack (20) is mounted at an upper end of the first lifting stand column (3). A second bed frame mounting rack (21) is mounted at upper ends of the second lifting stand column (4) and the third lifting stand column (5). The first bed frame mounting rack (20) comprises a first mounting plate (201) and a first fixing outer frame (202). The second bed frame mounting rack (21) comprises a second mounting plate (211), a third mounting plate (212), and a second fixing outer frame (213). The first fixing outer frame (202) is hinged to one end of a bed frame (2) by means of a third longitudinal hinge rod (205) and a fourth longitudinal hinge rod (206). The second fixing outer frame (213) is hinged to the other end of the bed frame (2) by means of a second transverse hinge rod (217) and a third transverse hinge rod (218).

Description

A multifunctional medical bed Technical Field

[0001] The invention relates to a multifunctional medical bed, belonging to the technical field of medical equipment. Background Art

[0002] At present, the bed board on the medical bed includes an intermediate bed board fixedly mounted on the bed frame, one end of the intermediate bed board is hingedly connected to a back board, the other end of the intermediate bed board is hingedly connected to a thigh board, and the thigh board is hingedly connected to a calf board. In order to flip the back board and the thigh board and achieve the effect of lifting the patient's back and legs, the bed frame is provided with a lifting element or other mechanism connected to the back board and the thigh board to provide driving force.

[0003] For example, the applicant previously disclosed a decompression medical bed in a document with publication number CN108938250A. This medical bed can decompress the patient's abdomen when the back and thigh boards are flipped. However, this decompression medical bed still has the following problems: 1. The bed frame of this current decompression medical bed is driven by two lifting columns and a tilting and deflecting assembly at both ends. Each tilting and deflecting assembly includes a connecting seat, an outer frame, and an inner frame, which are connected by various hinged shafts to achieve flipping and tilting. However, this support is not very stable. The entire bed frame is supported at only two points, so the support stability is relatively poor. In addition, an additional second pneumatic element is required to drive the inner and outer frames. 2. In addition, this current decompression medical bed does not have a weighing function. However, the patient's weight changes need to be weighed frequently, so the patient needs to be weighed separately, which is difficult for patients with mobility problems. 3. The operation of this decompression medical bed is still relatively cumbersome. Generally, it needs to be controlled at the patient's bedside, which is relatively troublesome. Especially when doctors and nurses are examining the patient from the side of the bed, they cannot operate it in time. 4. The main body of the current lifting motor is fixed to the walking frame by bolts and then covered with a cover. This fixing method requires welding a connector on one side of the lifting motor and then bolting it to the connector. This fixing of the connector to the walking frame has the following problems: first, the lifting motor is fixed on only one side, resulting in uneven force; second, the connector needs to be welded to the outer surface of the lifting motor, which is also relatively cumbersome. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a multifunctional medical bed which utilizes three-point support to achieve flipping and tilting, and the bed assembly is more stable.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a multifunctional medical bed, comprising a base and a bed body assembly installed on the base, the bed body assembly comprising a bed frame, an intermediate bed board, a back board, a thigh board and a calf board, the intermediate bed board is fixed to the bed frame, the back board is hinged to the bed frame through a back board flip connecting rod mechanism, a back board flip power device for driving the back board to flip is installed at the bottom of the bed frame, the thigh board and the calf board are hinged, one end of the calf board away from the thigh board is hinged to the bed frame through a supporting connecting rod, the thigh board and the bed frame are hinged through a thigh board flip connecting rod mechanism, and a thigh board flip power device for driving the thigh board to flip is installed at the bottom of the bed frame; a first lifting column is fixed to one end of the base, and the other end of the base is fixed to the A second lifting column and a third lifting column are fixed to one end, the first lifting column is driven by a first lifting power device, and the second lifting column and the third lifting column are driven by a second lifting power device and a third lifting power device respectively; the first lifting column, the second lifting column and the third lifting column form the three vertices of a triangle; a first bed frame mounting bracket is installed on the upper end of the first lifting column, and the first bed frame mounting bracket includes a first mounting plate and a first fixed outer frame, the first mounting plate is fixed to the upper end of the first lifting column, the first fixed outer frame is arranged on the outside of the first mounting plate, and a longitudinal bar hole extending longitudinally is provided on the first fixed outer frame, and the first mounting plate is connected to the first fixed outer frame by a first transverse hinge rod constrained in the longitudinal bar hole;

[0006] A second bed frame mounting bracket is mounted on the upper ends of the second lifting column and the third lifting column, the second bed frame mounting bracket includes a second mounting plate fixed to the second lifting column and a third mounting plate fixed to the third lifting column, a second fixed outer frame is provided on the periphery of the second mounting plate and the third mounting plate, the second mounting plate is hinged to one end of the second fixed outer frame via a first longitudinal hinge rod, the second fixed outer frame is further provided with a transverse bar hole extending laterally, the third mounting plate is hinged to the other end of the second fixed outer frame via a second longitudinal hinge rod, and the second longitudinal hinge rod is constrained in the transverse bar hole;

[0007] A third longitudinal hinge rod and a fourth longitudinal hinge rod are further installed at both longitudinal ends of the first fixed outer frame, and the third longitudinal hinge rod and the fourth longitudinal hinge rod are located on the longitudinal symmetrical midline of the bed frame of the medical bed; a second transverse hinge rod and a third transverse hinge rod are further installed at both transverse ends of the second fixed outer frame, and the first fixed outer frame and the second fixed outer frame are arranged inside the bed frame of the medical bed, and the first fixed outer frame is hinged to one end of the bed frame through the third longitudinal hinge rod and the fourth longitudinal hinge rod; the second fixed outer frame is hinged to the other end of the bed frame through the second transverse hinge rod and the third transverse hinge rod.

[0008] As a preferred solution, the base includes a walking frame, a universal wheel is installed at the bottom of the walking frame, a support frame is installed above the walking frame, and the support frame is installed on the walking frame through a weighing sensor. The first lifting power unit, the second lifting power unit and the third lifting power unit have the same structure and are all linear motors. The first lifting power unit and the first lifting column constitute an electric telescopic rod, the lower end of the first lifting column is fixed with the linear motor, and a motor fixing frame is fixed on the support frame. The linear motor is detachably fixed to the motor fixing frame.

[0009] As a preferred solution, the motor fixing frame includes a U-shaped frame body welded on the support frame, and a plurality of fixed mounting holes are provided on the opposite side walls of the frame body; a hoop is fixed to the outside of the main body of the linear motor, and the hoop is installed inside the frame body, and a plurality of fixing nuts are installed on the hoop, and the fixing nuts correspond one-to-one to the fixed mounting holes, and a fixing bolt that cooperates with the thread of the fixing nut is installed in the fixed mounting hole.

[0010] As a preferred solution, the ferrule includes a cylindrical ferrule body, an axial strip opening is provided on the ferrule body, connecting plate portions are provided on both edges of the strip opening, the connecting plate portions are locked by locking bolts, a plurality of axial mounting ribs are provided on the ferrule body, an axially extending open nut groove is provided on the axial mounting rib, the fixing nut is embedded in the nut groove, and the diameter of the opening is smaller than the outer diameter of the fixing nut.

[0011] As a preferred solution, an auxiliary connecting plate is also provided on the support frame, and the auxiliary connecting plate is provided with fixing holes corresponding to the positions of two nut embedding grooves, and fixing bolts threadedly connected to the corresponding fixing nuts are installed in the fixing holes of the auxiliary connecting plate.

[0012] As a preferred solution, a bottom shell is provided below the support frame, an electric control device is installed in the bottom shell, and a patch cord and a network cable interface are installed on the side wall of the bottom shell.

[0013] As a preferred solution, foot control devices connected to the electronic control device of the medical bed are installed on both sides of the bottom shell. The foot control device includes foot pedal mounting bases installed on both sides of the bottom shell of the medical bed. Each foot pedal mounting base is installed with several control foot pedals. The control foot pedals are electrically connected to the controller of the medical bed. The foot pedal mounting base is provided with an anti-accidental touch device to protect the control foot pedals.

[0014] As a preferred solution, the anti-accidental touch device includes a protective rod hinged on both sides of the pedal mounting seat, the protective rod spans each control pedal, and the pedal mounting seat is provided with a support member supporting both sides of the protective rod, and the support member supports the protective rod above the control pedal.

[0015] As a preferred solution, anti-collision blocks are installed on the four corners of the bed frame, anti-collision wheels are installed on the anti-collision blocks, and insertion holes for inserting infusion poles are provided on the anti-collision blocks.

[0016] As a preferred solution, an image tray for placing image films is longitudinally slidably mounted on the bed frame below the middle bed board, back board, thigh board and calf board.

[0017] After adopting the above technical solution, the effects of the present invention are: 1. The bed frame is supported by the first lifting column, the second lifting column and the third lifting column, thereby forming a three-point support, and the stability of the bed frame is improved; 2. The bed frame driving device can realize the tilting and deflection of the bed frame, wherein when the bed frame needs to be tilted, the first lifting column rises and the second lifting column and the third lifting column fall. At this time, due to the presence of the longitudinal bar holes, deflection can occur between the first fixed outer frame and the first mounting plate, and the first transverse hinged rod can also move within the range of the longitudinal bar holes, and the other end of the bed frame will also deflect around the second transverse hinged rod and the third transverse hinged rod, thereby realizing the tilting of the entire bed frame; similarly, the first lifting column can be lowered and the second lifting column and the third lifting column can be raised at the same time, so as to realize tilting in another direction. When the bed frame needs to be deflected, the heights of the second lifting column and the third lifting column are not equal. During this process, the bed frame will deflect relative to the first fixed outer frame around the third longitudinal hinge rod and the fourth longitudinal hinge rod. At the same time, the second mounting plate at the other end of the bed frame can deflect with the second fixed outer frame around the first longitudinal hinge rod, and the third mounting plate can deflect around the second fixed outer frame through the second longitudinal hinge rod, and during the deflection process, the second longitudinal hinge rod will slide in the transverse bar hole. In summary, the bed frame driving device of the present invention can support the bed frame through three points while also realizing the tilting and deflection of the bed frame.

[0018] Furthermore, since the base includes a walking frame, universal wheels are installed at the bottom of the walking frame, a support frame is installed above the walking frame, and the support frame is installed on the walking frame through a weighing sensor. The first lifting power device, the second lifting power device and the third lifting power device have the same structure and are all linear motors. The first lifting power device and the first lifting column constitute an electric telescopic rod, the lower end of the first lifting column is fixed with the linear motor, and a motor fixing frame is fixed on the support frame. The linear motor is detachably fixed to the motor fixing frame. Since the support frame is installed on the walking frame through the weighing sensor, the weight above the support frame will be detected by the weighing sensor, and the weighing sensor will detect it in real time when the patient gets on and off the bed, thereby being able to quickly and accurately monitor the patient's weight changes.

[0019] Furthermore, since the motor fixing frame includes a U-shaped frame body welded to the support frame, a plurality of fixed mounting holes are provided on the opposite side walls of the frame body; a ferrule is fixed to the outside of the main body of the linear motor, and the ferrule is installed inside the frame body, and a plurality of fixing nuts are installed on the ferrule, and the fixing nuts correspond one-to-one to the fixed mounting holes, and a fixing bolt that cooperates with the fixing nut thread is installed in the fixed mounting hole. Therefore, the linear motor is fixed by the ferrule, so there is no need to weld a connecting seat to the linear motor, and fixation is simpler.

[0020] Furthermore, the support frame is provided with an auxiliary connecting plate, which has fixing holes corresponding to the two nut slots. Fixing bolts threadedly connected to the corresponding fixing nuts are installed in the fixing holes of the auxiliary connecting plate. This auxiliary connecting plate can assist in connecting to the ferrule, thereby securing the linear motor more firmly and applying force more evenly.

[0021] Since a bottom shell is provided under the support frame, an electric control device is installed in the bottom shell, and a plug strip and a network cable interface are installed on the side wall of the bottom shell, the medical bed can be connected to the network and integrated into the hospital's management system using the network cable interface, making monitoring and management more convenient.

[0022] Furthermore, foot control devices connected to the medical bed's electrical control system are mounted on both sides of the bottom shell. These devices include foot mounting brackets mounted on both sides of the bottom shell. Each foot mounting bracket is equipped with a plurality of control pedals electrically connected to the medical bed's controller. These pedals are also equipped with an anti-accidental touch device to protect the control pedals. The presence of control pedals on the foot mounting brackets on both sides of the bottom shell allows doctors and nurses to operate the bed from both sides, making it more convenient for one person to control the bed. Furthermore, the anti-accidental touch device prevents patients from touching the control pedals when getting in and out of bed, further enhancing safety.

[0023] Furthermore, since the accidental touch prevention device includes a protective rod hinged on both sides of the footrest mounting base, the protective rod spans each control footrest, and the footrest mounting base is provided with a support member supporting both sides of the protective rod, and the support member supports the protective rod above the control footrest, when the patient gets in or out of bed, even if the patient accidentally touches the foot control device, they will step on the protective rod, and the protective rod will be supported by the support member, so that they cannot step on the control footrest, thus achieving a protective effect. When actual operation is required, the operator needs to lift the protective rod from the bottom up with his foot, and then place his foot on the control footrest. At this time, the protective plate is located on the instep of the foot, and the control footrest can be stepped on smoothly without hindering operation.

[0024] Furthermore, since anti-collision blocks are installed on the four corners of the bed frame, anti-collision wheels are installed on the anti-collision blocks, and insertion holes for inserting infusion poles are provided on the anti-collision blocks, the installation of the infusion stand is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings and examples.

[0026] FIG1 is a perspective view of an embodiment of the present invention;

[0027] FIG2 is a perspective view with the base hidden;

[0028] FIG3 is a perspective view from another angle with the base hidden;

[0029] FIG4 is a perspective view with part of the bed assembly hidden;

[0030] FIG5 is an enlarged schematic diagram of FIG4 at point A;

[0031] FIG6 is an enlarged schematic diagram of FIG4 at point B;

[0032] FIG7 is a perspective view of the base;

[0033] FIG8 is a perspective view of the base from another angle;

[0034] Figure 9 is a perspective view of the foot control device;

[0035] In the accompanying drawings: 1. Base; 101. Walking frame; 102. Support frame; 103. Weighing sensor; 104. Bottom shell; 105. Plug strip; 106. Electric control device; 2. Bed frame; 3. First lifting column; 31. First lifting power unit; 4. Second lifting column; 41. Second lifting power unit; 5. Third lifting column; 51. Third lifting power unit; 6. Backboard; 7. Middle bed board; 8. Thigh board; 9. Calf board; 10. Anti-collision block; 11. Backboard flip connecting rod mechanism; 12. Deflection drive arm; 13. Backboard flip power unit; 14. Thigh board flip power unit; 15. Anti-collision wheel; 16. Thigh board flip connecting rod mechanism; 17. Support connecting rod; 18. Infusion pole; 19. Image tray; 20. First Bed frame mounting frame; 201, first mounting plate; 202, first fixed outer frame; 203, first transverse hinged rod; 204, longitudinal bar hole; 205, third longitudinal hinged rod; 206, fourth longitudinal hinged rod; 21, second bed frame mounting frame; 211, second mounting plate; 212, third mounting plate; 213, second fixed outer frame; 214, first longitudinal hinged rod; 215, second longitudinal hinged rod; 216, transverse bar hole; 217, second transverse hinged rod; 218, third transverse hinged rod; 22, foot control device; 221, foot mounting seat; 222, control foot pedal; 223, support tongue plate; 224, protective rod; 23, hoop; 24, axial mounting rib; 25, auxiliary connecting plate; 26, motor fixing frame. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below through specific examples.

[0037] As shown in Figures 1 to 9, a multifunctional medical bed comprises a base 1 and a bed body assembly mounted on the base 1, wherein the bed body assembly comprises a bed frame 2, an intermediate bed board 7, a back board 6, a thigh board 8 and a calf board 9, wherein the intermediate bed board 7 is fixed to the bed frame 2, and the back board 6 is hinged to the bed frame 2 via a back board flip link mechanism 11, wherein the back board 6 flip connection mechanism in this embodiment is basically the same as the back board 6 movable link flip mechanism structure in the document CN108938250A, and also comprises two hinged connections. Rod, to realize the flipping of the backboard 6; a backboard flipping power device 13 for driving the flipping of the backboard 6 is installed at the bottom of the bed frame 2, the thigh board 8 and the calf board 9 are hinged, and the end of the calf board 9 away from the thigh board 8 is hinged to the bed frame 2 through a supporting connecting rod 17, and the thigh board 8 and the bed frame 2 are hinged through a thigh board flipping connecting rod mechanism 16. Similarly, the thigh board 8 flipping connection mechanism has the same structure as the thigh board 8 movable connecting rod flipping mechanism in the document CN108938250A. A thigh board flipping power device 14 for driving the thigh board 8 to flip is installed at the bottom of the bed frame 2; it is just that the structures of the back board flipping power device 13 and the thigh board flipping power device 14 of the present invention are different. Taking the back board flipping power device 13 as an example, the back board flipping power device 13 adopts an electric push rod, and a back board 6 drive shaft is rotatably installed on the bed frame 2. The electric push rod is hinged on the bed frame 2 and the back board 6 drive shaft to drive the back board 6 drive shaft to rotate, and a deflection drive arm 12 is fixed on the back board 6 drive shaft, and a roller is provided on the deflection drive arm 12. The corresponding back board 6 is provided with a longitudinal guide groove adapted to the roller. Therefore, when the electric push rod can drive the deflection drive arm 12 to deflect, the roller will slide in the longitudinal guide groove, thereby realizing the deflection and folding of the back board 6. Similarly, the drive of the thigh board 8 is the same as the drive of the back board 6.

[0038] An image tray 19 for placing imaging films is longitudinally slidably mounted on the bed frame 2 below the middle bed board 7, back board 6, thigh board 8 and calf board 9. The middle bed board 7, back board 6, thigh board 8 and calf board 9 are made of materials that are convenient for X-ray transmission.

[0039] A first lifting column 3 is fixed to one end of the base 1, and a second lifting column 4 and a third lifting column 5 are fixed to the other end of the base 1. The first lifting column 3 is driven by a first lifting power device 31, and the second lifting column 4 and the third lifting column 5 are driven by a second lifting power device 41 and a third lifting power device 51 respectively; the first lifting column 3, the second lifting column 4 and the third lifting column 5 form the three vertices of a triangle; a first bed frame mounting bracket 20 is mounted on the upper end of the first lifting column 3, and the first bed frame mounting bracket 20 includes a first mounting plate 201 and a first fixed outer frame 202, the first mounting plate 201 is fixed to the upper end of the first lifting column 3, the first fixed outer frame 202 is arranged on the outside of the first mounting plate 201, and a longitudinal bar hole 204 extending longitudinally is provided on the first fixed outer frame 202, and the first mounting plate 201 is connected to the first fixed outer frame 202 by a first transverse hinge rod 203 constrained in the longitudinal bar hole 204;

[0040] A second bed frame mounting bracket 21 is mounted on the upper ends of the second lifting column 4 and the third lifting column 5. The second bed frame mounting bracket 21 includes a second mounting plate 211 fixed to the second lifting column 4 and a third mounting plate 212 fixed to the third lifting column 5. A second fixed outer frame 213 is provided around the periphery of the second mounting plate 211 and the third mounting plate 212. The second mounting plate 211 is hinged to one end of the second fixed outer frame 213 via a first longitudinal hinge rod 214. The second fixed outer frame 213 is further provided with a transverse bar hole 216 extending laterally. The third mounting plate 212 is hinged to the other end of the second fixed outer frame 213 via a second longitudinal hinge rod 215. The second longitudinal hinge rod 215 is constrained within the transverse bar hole 216.

[0041] The first fixed outer frame 202 is also equipped with a third longitudinal hinge rod 205 and a fourth longitudinal hinge rod 206 at both longitudinal ends, and the third longitudinal hinge rod 205 and the fourth longitudinal hinge rod 206 are located on the longitudinal symmetrical midline of the bed frame 2 of the medical bed; the second fixed outer frame 213 is also equipped with a second transverse hinge rod 217 and a third transverse hinge rod 218 at both transverse ends, and the first fixed outer frame 202 and the second fixed outer frame 213 are arranged inside the bed frame 2 of the medical bed, and the first fixed outer frame 202 is hinged to one end of the bed frame 2 through the third longitudinal hinge rod 205 and the fourth longitudinal hinge rod 206; the second fixed outer frame 213 is hinged to the other end of the bed frame 2 through the second transverse hinge rod 217 and the third transverse hinge rod 218.

[0042] In this embodiment, the base 1 includes a walking frame 101, a universal wheel is installed at the bottom of the walking frame 101, a support frame 102 is installed above the walking frame 101, and the support frame 102 is installed on the walking frame 101 through a weighing sensor 103. The first lifting power device 31, the second lifting power device 41 and the third lifting power device 51 have the same structure and are all linear motors. The first lifting power device 31 and the first lifting column 3 constitute an electric telescopic rod. The lower end of the first lifting column 3 is fixed with the linear motor. The motor fixing frame 26 is fixed on the support frame 102, and the linear motor is detachably fixed to the motor fixing frame 26.

[0043] The motor fixing frame 26 comprises a U-shaped frame body welded to the support frame 102, with a plurality of fixing holes provided on opposite side walls of the frame body. A ferrule 23 is fixed to the outside of the main body of the linear motor, and the ferrule 23 is mounted inside the frame body. A plurality of fixing nuts are mounted on the ferrule 23, and the fixing nuts correspond to the fixing holes one by one. Fixing bolts are installed in the fixing holes and threadedly engage with the fixing nuts. The ferrule 23 comprises a cylindrical ferrule body 23, the ferrule body 23 having an axial strip opening, and connecting plates are provided on both edges of the strip opening. The connecting plates are locked by locking bolts, which can fix the ferrule 23 to the motor body. The ferrule body 23 has a plurality of axial mounting ribs 24, and the axial mounting ribs 24 have axially extending open nut slots, and the fixing nuts are embedded in the nut slots. The diameter of the opening is smaller than the outer diameter of the fixing nut.

[0044] The support frame 102 is further provided with an auxiliary connecting plate 25 , which is provided with fixing holes corresponding to the positions of two nut embedding grooves. Fixing bolts threadedly connected to the corresponding fixing nuts are installed in the fixing holes of the auxiliary connecting plate 25 .

[0045] In this embodiment, a bottom shell 104 is provided below the support frame 102. The bottom shell 104 can be used to install and place items and route wiring. In this embodiment, an electric control device 106 is installed in the bottom shell 104, and a power strip 105 and a network cable interface are installed on the side wall of the bottom shell 104.

[0046] Foot control devices 22 connected to the electronic control device 106 of the medical bed are installed on both sides of the bottom shell 104. The foot control device 22 includes foot pedal mounting bases 221 installed on both sides of the bottom shell 104 of the medical bed. Each foot pedal mounting base 221 is installed with a plurality of control foot pedals 222. The control foot pedals 222 are electrically connected to the controller of the medical bed. The foot pedal mounting base 221 is provided with an anti-accidental touch device to protect the control foot pedals 222.

[0047] The anti-accidental touch device includes a protection rod 224 hinged on both sides of the pedal mounting base 221. The protection rod 224 spans across each control pedal 222. The pedal mounting base 221 is provided with support members on both sides of the protection rod 224. The support members support the protection rod 224 above the control pedal 222. The support can also be a support tongue plate 223, which can effectively support the control pedal 222.

[0048] Anti-collision blocks 10 are installed on the four corners of the bed frame 2 , anti-collision wheels 15 are installed on the anti-collision blocks 10 , and insertion holes for inserting infusion poles 18 are provided on the anti-collision blocks 10 .

[0049] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solutions of the present invention without departing from the spirit of the present invention shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. A multi-functional medical bed, comprising a base and a bed body assembly mounted on the base. The bed body assembly includes a bed frame, an intermediate bed board, a back board, a thigh board, and a calf board. The intermediate bed board is fixed to the bed frame. The back board is hinged to the bed frame through a back board turning link mechanism. A back board turning power device for driving the back board to turn is installed at the bottom of the bed frame. The thigh board and the calf board are hinged to each other. One end of the calf board away from the thigh board is hinged to the bed frame through a support link. The thigh board is hinged to the bed frame through a thigh board turning link mechanism. A thigh board turning power device for driving the thigh board to turn is installed at the bottom of the bed frame. It is characterized in that: One end of the base is fixed with a first lifting column, and the other end of the base is fixed with a second lifting column and a third lifting column. The first lifting column is driven by a first lifting power device, and the second lifting column and the third lifting column are respectively driven by a second lifting power device and a third lifting power device; the first lifting column, the second lifting column and the third lifting column form three vertices of a triangle; the upper end of the first lifting column is provided with a first bed frame mounting bracket, and the first bed frame mounting bracket includes a first mounting plate and a first fixed outer frame. The first mounting plate is fixed to the upper end of the first lifting column, the first fixed outer frame is arranged outside the first mounting plate, and the first fixed outer frame is provided with longitudinally extending longitudinal slot holes. The first mounting plate is connected to the first fixed outer frame through a first transverse hinge rod constrained in the longitudinal slot holes; The upper ends of the second lifting column and the third lifting column are provided with a second bed frame mounting bracket, and the second bed frame mounting bracket includes a second mounting plate fixed to the second lifting column and a third mounting plate fixed to the third lifting column. The periphery of the second mounting plate and the third mounting plate is provided with a second fixed outer frame. The second mounting plate is hinged to one end of the second fixed outer frame through a first longitudinal hinge rod. The second fixed outer frame is also provided with horizontally extending transverse slot holes, and the third mounting plate is hinged to the other end of the second fixed outer frame through a second longitudinal hinge rod. The second longitudinal hinge rod is constrained in the transverse slot holes; The longitudinal two ends of the first fixed outer frame are also provided with a third longitudinal hinge rod and a fourth longitudinal hinge rod, and the third longitudinal hinge rod and the fourth longitudinal hinge rod are on the longitudinal symmetry line of the bed frame of the medical bed; the transverse two ends of the second fixed outer frame are also provided with a second transverse hinge rod and a third transverse hinge rod. The first fixed outer frame and the second fixed outer frame are arranged inside the bed frame of the medical bed. The first fixed outer frame is hinged to one end of the bed frame through the third longitudinal hinge rod and the fourth longitudinal hinge rod; the second fixed outer frame is hinged to the other end of the bed frame through the second transverse hinge rod and the third transverse hinge rod.

2. The multifunctional medical bed according to claim 1, wherein: The base includes a walking frame, and universal wheels are installed below the walking frame. A support frame is installed above the walking frame, and the support frame is installed on the walking frame through a weighing sensor. The structures of the first lifting power device, the second lifting power device and the third lifting power device are the same and are all linear motors. The first lifting power device and the first lifting column form an electric telescopic rod. The lower end of the first lifting column is fixed with the linear motor. A motor fixing frame is fixed on the support frame, and the linear motor is detachably fixed on the motor fixing frame.

3. The multifunctional medical bed according to claim 2, wherein: The motor fixing frame includes a U-shaped frame body welded to the support frame. A number of fixed mounting holes are provided on the opposite side walls of the frame body. A ferrule is fixed outside the main body of the linear motor. The ferrule is installed inside the frame body. A number of fixing nuts are installed on the ferrule. The fixing nuts correspond to the fixed mounting holes one by one. Fixing bolts that are threadedly engaged with the fixing nuts are installed in the fixed mounting holes.

4. The multifunctional medical bed according to claim 3, characterized in that: The ferrule includes a cylindrical ferrule body. An axial strip-shaped opening is provided on the ferrule body. Connecting plate portions are provided on both edges of the strip-shaped opening. The connecting plate portions are locked by a locking bolt. A number of axial mounting ribs are provided on the ferrule body. Axial nut slots with openings extending axially are provided on the axial mounting ribs. The fixing nuts are embedded in the nut slots with openings. The diameter of the opening is smaller than the outer diameter of the fixing nut.

5. The multifunctional medical bed according to claim 4, wherein: An auxiliary connecting plate is further provided on the support frame. Fixing holes corresponding to the positions of two of the nut slots are provided on the auxiliary connecting plate. Fixing bolts that are threadedly connected to the corresponding fixing nuts are installed in the fixing holes of the auxiliary connecting plate.

6. The multifunctional medical bed according to claim 5, characterized in that: A bottom case is provided below the support frame. An electric control device is installed in the bottom case. A wire plug row and a network cable interface are installed on the side wall of the bottom case.

7. The multifunctional medical bed according to claim 6, wherein: Foot control devices connected to the electric control device of the medical bed are installed on both sides of the bottom case. The foot control device includes foot mounting seats installed on both sides of the bottom case of the medical bed. A number of control foot pedals are installed on each foot mounting seat. The control foot pedals are electrically connected to the controller of the medical bed. An anti-misoperation device for protecting the control foot pedals is provided on the foot mounting seat.

8. The multifunctional medical bed according to claim 7, characterized in that: The anti-misoperation device includes protection rods hinged on both sides of the foot mounting seat. The protection rods span across the control foot pedals. Support members for supporting both sides of the protection rods are provided on the foot mounting seat. The support members support the protection rods above the control foot pedals.

9. The multifunctional medical bed according to claim 8, wherein: Anti-collision blocks are installed at the four corners of the bed frame. Anti-collision wheels are installed on the anti-collision blocks. Plug holes for inserting an infusion rod are provided on the anti-collision blocks.

10. The multifunctional medical bed according to claim 9, characterized in that: An image tray for placing X-ray films is longitudinally and slidably installed below the middle bed board, back board, thigh board and calf board on the bed frame.

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