Bed changing trolley for nuclear magnetic resonance imaging

Abstract

The invention relates to the technical field of nuclear magnetic resonance imaging, in particular to a nuclear magnetic resonance imaging bed changing trolley which comprises a frame, a supporting plate and a bed changing assembly. The bed changing assembly comprises a bed board, a moving seat, a connecting seat, a connecting plate, a driving component, a rotating component and a locking component, the driving component drives the moving seat to move so as to drive the connecting seat, the connecting plate and the bed board to move, the bed board pushes the nuclear magnetic resonance scanning bed, and then a patient is stably transferred to a preset position of the nuclear magnetic resonance scanning bed; after the bed plate is in place, the connecting seat is driven by the driving component to rotate reversely, so that the connecting seat is separated from the connecting plate, and meanwhile, the locking component acts to lock the bed plate on the nuclear magnetic resonance scanning bed; after examination is finished, the frame is pushed back to the position where the frame is in butt joint with the scanning bed again, the rotating component drives the connecting base to rotate and reset, and in the process, the locking component unlocks the bed board, so that the purpose of improving the bed changing efficiency is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear magnetic resonance examination, and particularly to a nuclear magnetic resonance imaging bed-changing trolley. BACKGROUND

[0002] In the process of nuclear magnetic resonance imaging examination, for patients who are inconvenient to move, in bed or in a narcotic state, it is necessary to transfer them from a mobile trolley to an MRI scanning bed. The traditional transfer method mainly relies on manual carrying by medical staff or the use of a simple bed board. This method not only has low efficiency and high labor intensity of medical staff, but also has a major safety risk of patient slipping, bumping and even secondary injury.

[0003] Some bed-changing trolleys with translation function have appeared in the prior art. These trolleys are usually provided with a slidable bed board. A driving member is used to move the bed board between the trolley and the MRI scanning bed, thereby realizing the transfer of the patient.

[0004] However, after the bed board is moved to the MRI scanning bed, there is a lack of automatic locking structure. Medical staff need to manually operate a latch or a knob to fix the bed board and the scanning bed. The steps are complicated. At the same time, after the examination is completed, the bed board needs to be manually unlocked to be retracted into the trolley. The whole process is not fully automated, resulting in low efficiency of patient transfer. SUMMARY

[0005] The present application aims to provide a nuclear magnetic resonance imaging bed-changing trolley, which solves the problem of low efficiency of bed-changing caused by the need for staff to lock the bed board.

[0006] To achieve the above-mentioned purpose, the present application provides a nuclear magnetic resonance imaging bed-changing trolley, which comprises a trolley frame and a supporting plate, the supporting plate is arranged on the trolley frame, and further comprises a bed-changing assembly; the bed-changing assembly comprises a bed board, a moving seat, a connecting seat, a connecting plate, a driving member, a rotating member and a locking member, the bed board is slidably connected with the supporting plate and located on one side of the supporting plate, the moving seat is slidably connected with the supporting plate and arranged on the supporting plate, the connecting seat is rotatably connected with the moving seat and located on one side of the moving seat close to the bed board, the connecting plate is fixedly connected with the bed board and arranged on the bed board, the connecting seat has a connecting groove matched with the connecting plate, the driving member is arranged on the supporting plate and used to drive the moving seat to move, the rotating member is arranged on the moving seat and used to drive the connecting seat to rotate, and the locking member is arranged on the bed board.

[0007] Among them, the bed board comprises a plate body and a pulley, the plate body is connected with the supporting plate and fixedly connected with the connecting plate; and the pulley is rotatably connected with the plate body and in contact with the supporting plate.

[0008] The plate body is provided with a limiting protrusion on the side close to the pulley, and the supporting plate is provided with a limiting groove on the side close to the limiting protrusion, and the limiting groove is matched with the limiting protrusion.

[0009] The driving member comprises a threaded rod and a threaded sleeve, the threaded rod is rotationally connected with the supporting plate and located inside the supporting plate, and the threaded sleeve is threadedly connected with the threaded rod and slidingly connected with the supporting plate and fixedly connected with the moving base.

[0010] The rotating member comprises a worm wheel and a worm, the worm wheel is fixedly connected with the connecting base and rotationally connected with the moving base and located inside the moving base, and the worm is rotationally connected with the moving base and engaged with the worm wheel.

[0011] The locking member comprises a plug-in base, a rotating disc, a locking base and a transmission member, the plug-in base is fixedly connected with the connecting base and located on one side of the connecting base, the rotating disc is rotationally connected with the plate body and located inside the plate body, the locking base is slidingly connected with the plate body and arranged on the plate body, and the transmission member is arranged inside the plate body.

[0012] The transmission member comprises a connecting shaft, a rotating rod and a moving rod, the connecting shaft is fixedly connected with the rotating disc and located on one side of the rotating disc, the moving rod is fixedly connected with the locking base and located on one side of the locking base, and the two ends of the rotating rod are rotationally connected with the connecting shaft and the moving rod respectively.

[0013] The nuclear magnetic resonance imaging bed changing trolley of the present application, in use, first moves the bed plate carrying the patient and the trolley frame to the side of the nuclear magnetic resonance scanning bed, drives the bed plate to rise and fall through the lifting of the trolley frame, makes the upper surface of the bed plate and the bed surface of the nuclear magnetic resonance scanning bed be at the same horizontal height, at this time, drives the connecting seat to rotate through the rotating member, makes the connecting groove and the connecting plate be embedded, and further makes the connecting seat and the connecting plate be in the connected state; then drives the driving member, the driving member drives the moving seat to move, and further drives the connecting seat, the connecting plate and the bed plate to move, pushes the bed plate to the nuclear magnetic resonance scanning bed, and further stably moves the patient to the predetermined position of the nuclear magnetic resonance scanning bed; when the bed plate is in place, reversely rotates the connecting seat through the driving member, makes the connecting seat and the connecting plate be separated, at the same time, the locking member acts, locks the bed plate on the nuclear magnetic resonance scanning bed, and ensures the stability of the bed plate in the subsequent scanning process; finally, the medical staff can move away the empty trolley frame, and performs the nuclear magnetic resonance imaging scanning; after the examination is completed, pushes the trolley frame back to the position of abutting with the scanning bed again, drives the connecting seat to rotate back to the original position through the rotating member, makes the connecting groove be embedded with the connecting plate again, in this process, the locking member releases the locking of the bed plate; finally, the driving member is started again, through the cooperation of the connecting seat and the connecting plate, pulls the bed plate together with the patient back to the supporting plate, completes the whole bed changing process, and thus the purpose of improving the bed changing efficiency is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced.

[0015] Figure 1 is the overall structure schematic diagram of the nuclear magnetic resonance imaging bed changing trolley of the first embodiment of the present application.

[0016] Figure 2 is the overall structure schematic diagram of the nuclear magnetic resonance imaging bed changing trolley of the first embodiment of the present application. Figure 1 is the enlarged view of A of the nuclear magnetic resonance imaging bed changing trolley of the first embodiment of the present application.

[0017] Figure 3 is the installation structure schematic diagram of the pulley of the first embodiment of the present application.

[0018] Figure 4 is the structure schematic diagram of the driving member of the first embodiment of the present application.

[0019] Figure 5 is the structure schematic diagram of the rotating member of the first embodiment of the present application.

[0020] Figure 6 is the installation structure schematic diagram of the connecting plate of the first embodiment of the present application.

[0021] Figure 7 is a structural schematic view of a transmission member of a second embodiment of the present application.

[0022] Figure 8 is a schematic view of the mounting structure of a lifting rod of a third embodiment of the present application.

[0023] In the figure: 101-frame, 102-plate, 103-universal wheel, 104-bed changing assembly, 105-bed plate, 106-moving seat, 107-connecting seat, 108-connecting plate, 109-driving member, 110-rotating member, 111-locking member, 112-plate body, 113-pulley, 114-limiting protrusion, 115-limiting groove, 116-threaded rod, 117-threaded sleeve, 118-first driving motor, 119-worm wheel, 120-worm, 121-second driving motor, 122-scanning bed, 123-locking groove, 124-connecting groove, 201-plug-in seat, 202-rotating disc, 203-locking seat, 204-transmission member, 205-connecting shaft, 206-rotating rod, 207-moving rod, 208-spring, 301-bottom plate, 302-sleeve body, 303-lifting rod, 304-electric push rod. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, the embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0025] First embodiment:

[0026] Please refer to Figures 1 to 6 , wherein Figure 1 is a schematic view of the overall structure of a magnetic resonance imaging bed changing trolley, Figure 2 is Figure 1 is an enlarged view of A of Figure 3 is a schematic view of the mounting structure of a pulley, Figure 4 is a schematic view of the structure of a driving member, Figure 5 is a schematic view of the structure of a rotating member, Figure 6 is a schematic view of the mounting structure of a connecting plate.

[0027] The application provides a nuclear magnetic resonance imaging bed changing trolley, which comprises a trolley frame 101, a supporting plate 102 and a bed changing assembly 104, the bed changing assembly 104 comprises a bed plate 105, a moving seat 106, a connecting seat 107, a connecting plate 108, a driving member 109, a rotating member 110 and a locking member 111, the bed plate 105 comprises a plate body 112 and a pulley 113, the plate body 112 is provided with a limiting protrusion 114, the supporting plate 102 is provided with a limiting groove 115, the driving member 109 comprises a threaded rod 116 and a threaded sleeve 117, the rotating member 110 comprises a worm wheel 119 and a worm 120, the moving seat 106 is driven to move by the driving member 109, and then the connecting seat 107, the connecting plate 108 and the bed plate 105 are driven to move, the bed plate 105 and a patient are pushed to a nuclear magnetic resonance scanning bed 122, at this time, the connecting seat 107 is driven to rotate by the rotating member 110, the connecting seat 107 and the connecting plate 108 are separated, and then the connecting seat 107 and the bed plate 105 are separated, at the same time, the bed plate 105 is locked on the nuclear magnetic resonance scanning bed 122 by the locking member 111, finally, the trolley frame 101 is removed, after the examination is finished, the connecting seat 107 is extended into the bed plate 105, and the connecting seat 107 is driven to rotate by the rotating member 110, the connecting seat 107 is connected with the connecting plate 108, and at the same time, the locking member 111 is unlocked, so that the purpose of improving the bed changing efficiency is achieved, and it can be understood that the foregoing scheme can be used when the bed changing efficiency is improved, and can also be used when the bed plate 105 is automatically locked and unlocked.

[0028] For the specific embodiment, the supporting plate 102 is arranged on the trolley frame 101, four locking universal wheels 103 are arranged at the bottom of the trolley frame 101, the trolley frame 101 is conveniently pushed to move by the four universal wheels 103, the trolley frame 101 can drive the supporting plate 102 to lift, and then drives the bed plate 105 to lift, so that the height of the bed plate 105 matches the height of the nuclear magnetic resonance scanning bed 122.

[0029] The bed plate 105 is in sliding connection with the supporting plate 102 and is located on one side of the supporting plate 102, the moving seat 106 is in sliding connection with the supporting plate 102 and is arranged on the supporting plate 102, the connecting seat 107 is in rotary connection with the moving seat 106 and is located on the side of the moving seat 106 close to the bed plate 105, the connecting plate 108 is in fixed connection with the bed plate 105 and is arranged on the bed plate 105, the connecting seat 107 is provided with a connecting groove 124, the connecting groove 124 is matched with the connecting plate 108, the driving member 109 is arranged on the supporting plate 102 and is used for driving the moving seat 106 to move, the rotating member 110 is arranged on the moving seat 106 and is used for driving the connecting seat 107 to rotate, and the locking member 111 is arranged on the bed plate 105; the connecting plate 108 is arranged in two and is located on the left and right sides of the connecting seat 107, the connecting seat 107 is driven to rotate through the rotating member 110, and then the connecting groove 124 is driven to rotate, when the connecting groove 124 is rotated to the position of the connecting plate 108, the connecting groove 124 is in embedded matching with the connecting plate 108, so that the connecting seat 107 is connected with the connecting plate 108, when the connecting groove 124 is rotated to be separated from the connecting plate 108, the connecting seat 107 is separated from the connecting plate 108, and the locking member 111 is used for locking the bed plate 105 on the nuclear magnetic resonance scanning bed 122; all structural members in the trolley 101, the supporting plate 102, the bed plate 105 and the bed changing assembly 104 in the application are made of non-magnetic or low-magnetic materials, such as carbon fiber composite materials or special non-magnetic aluminum alloys, so that the trolley cannot be attracted by a magnetic field to cause a safety risk, meanwhile, all electrical members are subjected to magnetic shielding and radio frequency shielding treatment, and the working of the electrical members will not interfere with the main magnetic field and the radio frequency signal of the nuclear magnetic resonance equipment, so that the generation of image artifacts is avoided, and thus the safety and the imaging quality of the nuclear magnetic resonance examination equipment are not affected by the bed changing trolley.

[0030] In use, first, the bed plate 105 and the frame 101 loaded with the patient are moved to the side of the magnetic resonance scanning bed 122, the bed plate 105 is lifted by the lifting of the frame 101, the upper surface of the bed plate 105 is at the same level as the bed surface of the magnetic resonance scanning bed 122, at this time, the connecting seat 107 is driven to rotate by the rotating member 110, the connecting groove 124 is embedded with the connecting plate 108, and then the connecting seat 107 and the connecting plate 108 are in a connected state; then the driving member 109 is driven, the driving member 109 drives the movement of the moving seat 106, and then drives the movement of the connecting seat 107, the connecting plate 108 and the bed plate 105, pushes the bed plate 105 to the magnetic resonance scanning bed 122, and then smoothly moves the patient to the predetermined position of the magnetic resonance scanning bed 122; when the bed plate 105 is in place, the connecting seat 107 is driven to rotate reversely by the driving member 109, the connecting seat 107 and the connecting plate 108 are disconnected, at the same time, the locking member 111 acts to lock the bed plate 105 on the magnetic resonance scanning bed 122, and ensures the stability of the bed plate 105 in the subsequent scanning process; finally, the medical staff can move away the empty frame 101, and perform magnetic resonance imaging scanning; after the examination is completed, the frame 101 is pushed back to the position of abutting with the scanning bed 122, the connecting seat 107 is driven to rotate by the rotating member 110, the connecting groove 124 is embedded with the connecting plate 108 again, in this process, the locking member 111 releases the locking of the bed plate 105; finally, the driving member 109 is started again, the bed plate 105 is pulled back to the supporting plate 102 together with the patient by the cooperation of the connecting seat 107 and the connecting plate 108, the whole bed changing process is completed, and the purpose of improving the bed changing efficiency is achieved.

[0031] Secondly, the plate body 112 is connected with the supporting plate 102 and is fixedly connected with the connecting plate 108; the pulleys 113 are rotationally connected with the plate body 112 and are in contact with the supporting plate 102; the pulleys 113 are provided in plurality and are uniformly arranged at the bottom of the plate body 112, the plate body 112 can realize low-friction linear movement relative to the supporting plate 102 through the rolling support of the plurality of pulleys 113.

[0032] Meanwhile, the limiting protrusion 114 is arranged on one side of the plate body 112 close to the pulley 113, the limiting groove 115 is arranged on one side of the supporting plate 102 close to the limiting protrusion 114, and the limiting groove 115 is matched with the limiting protrusion 114; the limiting protrusion 114 extends into the limiting groove 115, the movement of the limiting protrusion 114 is limited by the limiting groove 115, and then the movement of the plate body 112 is limited, so that the plate body 112 is prevented from deviating when moving.

[0033] In addition, the threaded rod 116 is rotationally connected with the supporting plate 102 and located in the supporting plate 102; the threaded sleeve 117 is threadedly connected with the threaded rod 116 and slidably connected with the supporting plate 102 and fixedly connected with the moving base 106; the first driving motor 118 is installed on the supporting plate 102, the output end of the first driving motor 118 is connected with the threaded rod 116, the threaded rod 116 is driven to rotate by the first driving motor 118, the threaded sleeve 117 is driven to move by the threaded rod 116, the moving base 106 is driven to move by the threaded sleeve 117, and the purpose of driving the moving base 106 to move is achieved.

[0034] Finally, the worm gear 119 is fixedly connected with the connecting base 107 and rotationally connected with the moving base 106 and located in the moving base 106; the worm 120 is rotationally connected with the moving base 106 and engaged with the worm gear 119; the second driving motor 121 is installed in the moving base 106, the output end of the second driving motor 121 is connected with the worm 120, the worm 120 is driven to rotate by the second driving motor 121, the worm gear 119 is driven to rotate by the worm 120, the connecting base 107 is driven to rotate by the worm gear 119, and the purpose of driving the connecting base 107 to rotate is achieved; meanwhile, the stability of the connecting base 107 is improved by the self-locking property between the worm gear 119 and the worm 120, and the connecting base 107 is prevented from being accidentally separated from the connecting plate 108.

[0035] Second embodiment:

[0036] On the basis of the first embodiment, please refer to Figure 7 , Figure 7 is a structural schematic view of a transmission member of the second embodiment, the locking member 111 of the embodiment comprises a plug-in seat 201, a rotating disc 202, a locking seat 203 and a transmission member 204, the transmission member 204 comprises a connecting shaft 205, a rotating rod 206, a moving rod 207 and a spring 208.

[0037] For this specific embodiment, the plug-in seat 201 is fixedly connected with the connecting seat 107 and located on one side of the connecting seat 107; the rotating disc 202 is rotatably connected with the plate body 112 and located inside the plate body 112; the locking seat 203 is slidably connected with the plate body 112 and arranged on the plate body 112; the transmission member 204 is arranged inside the plate body 112; the plug-in seat 201 is rectangular, and the rotating disc 202 is provided with a rectangular groove matched with the plug-in seat 201.

[0038] The connecting shaft 205 is fixedly connected with the rotating disc 202 and located on one side of the rotating disc 202; the moving rod 207 is fixedly connected with the locking seat 203 and located on one side of the locking seat 203; the two ends of the rotating rod 206 are rotatably connected with the connecting shaft 205 and the moving rod 207 respectively; two connecting shafts 205 are arranged on the two sides of the rotating disc 202 respectively, and a plurality of rotating rods 206 and moving rods 207 can be arranged on one connecting shaft 205; the nuclear magnetic resonance scanning bed 122 is provided with a locking groove 123 matched with the locking seat 203, and the locking seat 203 can extend into the locking groove 123; when the connecting seat 107 extends into the plate body 112, it drives the plug-in seat 201 to be inserted into the rectangular groove on the rotating disc 202; when the connecting seat 107 is rotated to be connected with the connecting plate 108, the rotating seat drives the plug-in seat 201 to rotate, thereby driving the rotating disc 202 to rotate, the rotating disc 202 drives the two connecting shafts 205 to move in a circular motion, the connecting shaft 205 drives the rotating rod 206 mounted thereon to move, the rotating rod 206 drives the moving rod 207 and the locking seat 203 to move, so that the locking seat 203 is received in the plate body 112, at this time, the locking seat 203 does not affect the movement of the plate body 112 on the supporting plate 102 and the nuclear magnetic resonance scanning bed 122; when the plate body 112 moves to the nuclear magnetic resonance scanning bed 122, the connecting seat 107 is reversely rotated to be separated from the connecting plate 108, at this time, the rotating disc 202 is reversely rotated, thereby driving the connecting shaft 205 to reversely rotate, the connecting shaft 205 drives the corresponding rotating rod 206 to move, so that the rotating rod 206 pushes the moving rod 207 and the locking seat 203 out, thereby making the locking seat 203 extend into the locking groove 123 on the nuclear magnetic resonance scanning bed 122, so as to complete the locking of the bed plate 105.

[0039] Secondly, the two ends of the spring 208 are connected with the locking seat 203 and the plate body 112 respectively, and the spring 208 is sleeved on the moving rod 207; the spring 208 drives the locking seat 203 to move outward, and then provides a continuous outward thrust for the locking seat 203 after the connecting seat 107 is separated from the bed plate 105, so that the locking seat 203 is prevented from moving due to external force and other factors, and the connection between the bed plate 105 and the magnetic resonance scanning bed 122 is prevented from loosening.

[0040] Third embodiment:

[0041] On the basis of the first embodiment, please refer to Figure 8 , Figure 8 is a mounting structure diagram of the lifting rod of the third embodiment, and the bed frame of the embodiment comprises a bottom plate 301, a sleeve body 302, a lifting rod 303 and an electric push rod 304.

[0042] For this specific embodiment, the bottom plate 301 is arranged at the bottom of the supporting plate 102; the sleeve body 302 is fixedly connected with the bottom plate 301 and located at one side of the bottom plate 301; the lifting rod 303 is slidingly connected with the sleeve body 302 and fixedly connected with the supporting plate 102, and is arranged on the sleeve body 302; the electric push rod 304 is connected with the bottom plate 301, and the output end of the electric push rod 304 is connected with the supporting plate 102. The sleeve body 302 and the lifting rod 303 are provided with four, and are located at the four corners of the bottom plate 301; the universal wheel 103 is installed at the bottom of the bottom plate 301, and the bottom plate is driven to lift by the electric push rod 304, thereby driving the bed plate 105 to lift, and at the same time, the lifting of the lifting rod 303 is guided by the sleeve body 302, thereby guiding the lifting of the supporting plate 102, and improving the stability of the lifting of the supporting plate 102.

[0043] When using the MRI imaging trolley of the present application, first push the frame 101 to the side of the MRI scanning bed 122, start the electric push rod 304 to adjust the height of the bed plate 102, so that the bed plate 105 is flush with the scanning bed 122; then the driving member 109 works, through the transmission of the threaded rod 116 and the threaded sleeve 117, pushes the moving seat 106 and the bed plate 105 connected thereto to move towards the scanning bed 122, after the bed plate 105 is in place, the rotating member 110 drives the connecting seat 107 to rotate reversely, so that it is disconnected from the connecting plate 108, in the process of reverse rotation of the connecting seat 107, the plug-in seat 201, the rotating disc 202 and the connecting shaft 205 are rotated, so that the rotating rod 206 drives the moving rod 207 and the locking seat 203 to extend into the locking groove 123 on the scanning bed 122, so as to lock the bed plate 105, at this time the frame 101 can be removed for examination; after the examination is completed, the frame 101 is reset, the rotating member 110 drives the connecting seat 107 to rotate, so that the connecting seat 107 is reconnected with the connecting plate 108, at the same time, the rotating seat and the connecting shaft 205 are reversely rotated, so that the locking seat 203 is retracted into the bed plate 105, thereby unlocking the bed plate 105, finally the driving member 109 drives the moving seat 106 to move to retract the bed plate 105, completing the operation.

[0044] The above disclosure is only one or more preferred embodiments of the present application, which cannot be used to limit the scope of the present application, and those skilled in the art can understand that all or part of the above-mentioned embodiments can be implemented, and equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.

Claims

1. A magnetic resonance imaging (MRI) bed-changing trolley, comprising a frame and a tray, wherein the tray is disposed on the frame, characterized in that, It also includes bed changing components; The bed-changing assembly includes a bed board, a movable seat, a connecting seat, a connecting plate, a driving component, a rotating component, and a locking component. The bed board is slidably connected to the support plate and is located on one side of the support plate. The movable seat is slidably connected to the support plate and is disposed on the support plate. The connecting seat is rotatably connected to the movable seat and is located on the side of the movable seat near the bed board. The connecting plate is fixedly connected to the bed board and is disposed on the bed board. The connecting seat has a connecting groove that cooperates with the connecting plate. The driving component is disposed on the support plate and is used to drive the movable seat to move. The rotating component is disposed on the movable seat and is used to drive the connecting seat to rotate. The locking component is disposed on the bed board.

2. The MRI bed-changing trolley as described in claim 1, characterized in that, The bed board includes a board body and pulleys. The board body is connected to the support plate and fixedly connected to the connecting plate. The pulleys are rotatably connected to the board body and contact the support plate.

3. The MRI bed-changing trolley as described in claim 2, characterized in that, The plate has a limiting protrusion, which is disposed on the side of the plate near the pulley; the tray has a limiting groove, which is disposed on the side of the tray near the limiting protrusion, and the limiting groove cooperates with the limiting protrusion.

4. The MRI bed-changing trolley as described in claim 1, characterized in that, The driving component includes a threaded rod and a threaded sleeve. The threaded rod is rotatably connected to the pallet and is located inside the pallet. The threaded sleeve is threadedly connected to the threaded rod, slidably connected to the pallet, and fixedly connected to the movable seat.

5. The MRI bed-changing trolley as described in claim 4, characterized in that, The rotating component includes a worm gear and a worm. The worm gear is fixedly connected to the connecting seat and rotatably connected to the movable seat, and is located inside the movable seat. The worm is rotatably connected to the movable seat and meshes with the worm gear.

6. The MRI bed-changing trolley as described in claim 2, characterized in that, The locking component includes a plug-in seat, a rotating disk, a locking seat, and a transmission component. The plug-in seat is fixedly connected to the connecting seat and is located on one side of the connecting seat. The rotating disk is rotatably connected to the plate and is located inside the plate. The locking seat is slidably connected to the plate and is disposed on the plate. The transmission component is disposed inside the plate.

7. The MRI bed-changing trolley as described in claim 6, characterized in that, The transmission component includes a connecting shaft, a rotating rod, and a moving rod. The connecting shaft is fixedly connected to the rotating disk and is located on one side of the rotating disk. The moving rod is fixedly connected to the locking seat and is located on one side of the locking seat. The two ends of the rotating rod are rotatably connected to the connecting shaft and the moving rod, respectively.

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