Nuclear magnetic resonance examination auxiliary device for ultrasonic department

Abstract

The invention relates to the technical field of medical equipment, in particular to an ultrasonic nuclear magnetic resonance examination auxiliary device which comprises a moving trolley, a plurality of lifting air cylinders are fixedly connected to the upper surface of the moving trolley, a lifting bed is fixedly connected between the moving ends of the lifting air cylinders, and a sliding plate is slidably connected to the upper surface of the lifting bed. The upper surface of the sliding plate is detachably connected with a soft cushion, one side of the sliding plate is fixedly connected with a plurality of fixing seats, the inner sides of the fixing seats are fixedly connected with rotating pieces, and the outer surfaces of the fixing seats are rotationally connected with multi-stage electric push rods; when the multi-stage electric push rod drives the sliding plate to slide backwards, a patient can be stably transferred from a sickbed to an examination bed, bumping or shaking possibly occurring in the transferring process is avoided, and therefore the risk that the patient falls down or is injured is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an auxiliary device for magnetic resonance examination in the ultrasound department. Background Art

[0002] In the field of modern medical imaging diagnosis, magnetic resonance generates high-precision anatomical structure and functional images by exciting the nuclear magnetic resonance phenomenon of hydrogen protons in the human body in a strong magnetic field, collecting and analyzing the signals generated thereby, providing doctors with detailed internal tissue information. When a patient undergoes a magnetic resonance examination, the patient can be quickly transferred from the hospital bed to the magnetic resonance examination bed, reducing the time and labor costs during the transfer process.

[0003] When a mobile cart transfers a patient, it needs to manually carry or tilt the patient to transfer the patient onto the examination bed. However, when using this method for transfer, it is easy to cause the patient to lose balance, increasing the risk of falling or getting injured. Moreover, manual operation requires more time and labor, which may lead to an extended examination process, increasing the patient's waiting time and reducing the examination efficiency.

[0004] Therefore, the present invention proposes an auxiliary device for magnetic resonance examination in the ultrasound department to make up for and improve the deficiencies of the existing technology. Summary of the Invention

[0005] Aiming at the defects existing in the prior art, the present invention provides an auxiliary device for magnetic resonance examination in the ultrasound department, which can effectively solve the above technical problems.

[0006] The technical implementation solution of the present invention is as follows: An auxiliary device for magnetic resonance examination in the ultrasound department includes a mobile cart. A plurality of lifting cylinders are fixedly connected to the upper surface of the mobile cart. A lifting bed is fixedly connected between the moving ends of the lifting cylinders. A sliding plate is slidably connected to the upper surface of the lifting bed. A soft pad is detachably connected to the upper surface of the sliding plate. A plurality of fixed seats are fixedly connected to one side of the sliding plate. Rotating members are fixedly connected to the inner sides of the fixed seats. Multistage electric push rods are rotatably connected to the outer surfaces of the fixed seats. When the moving ends of the multistage electric push rods move backward, they can drive the sliding plate to move backward, so that the patient can be located on the upper surface of the examination bed.

[0007] More preferably, a plurality of moving frames are fixedly connected to the bottom of the lifting bed. Sliding frames are slidably connected to the inner sides of the moving frames. One sides of the sliding frames are rotatably connected to one sides of multi-stage electric push rods. A plurality of connecting frames are fixedly connected to the upper surface of the moving vehicle. Sliding grooves are formed through the inner sides of the connecting frames. The bottoms of the sliding grooves of the connecting frames are inclined. The outer surfaces of one sides of the sliding frames are slidably connected to the sliding grooves of the connecting frames. The inner sides of the sliding grooves of the connecting frames are in pressing fit with the outer surfaces of one ends of the sliding frames. A protective cover is rotatably connected to one side of the lifting bed. A plurality of elastic cloths are fixedly connected to one side of the protective cover. When the sliding frame moves forward, it can drive the multi-stage electric push rod to swing automatically.

[0008] More preferably, a fixed frame is fixedly connected to the middle of the upper surface of the moving vehicle. A counterweight is slidably connected to the outer surface of the top of the fixed frame. A plurality of connecting ropes are fixedly connected to one side of the counterweight. The outer surfaces of the connecting ropes slide through one side of the fixed frame. The ends of the connecting ropes away from the counterweight are fixedly connected to one side of the sliding plate. When the counterweight slides forward, the overall center of gravity of the moving vehicle can be kept balanced.

[0009] More preferably, a plurality of rollers are linearly slidably connected to the inner side of the fixed frame. The lower surface of the counterweight is slidably matched with the outer surfaces of the rollers. By sliding the counterweight between the outer surfaces of the rollers, the smoothness of the sliding of the counterweight can be increased.

[0010] More preferably, the upper surface of the fixed frame is inclined. The inclined surface of the upper surface of the fixed frame can drive the counterweight to reset automatically.

[0011] More preferably, a plurality of guardrail frames are rotatably connected to the inner side of the sliding plate. A connecting rod is rotatably connected between the tops of the guardrail frames. By flipping between the guardrail frames and the connecting rod, the patient can be blocked.

[0012] More preferably, a turbine is fixedly connected to one side of one of the guardrail frames. A worm is threadedly connected to the outer surface of the turbine. One ends of the worms are fixedly connected to one ends of the rotating members. When the rotating members rotate, the guardrail frames and the connecting rod can be automatically raised and lowered.

[0013] More preferably, a plurality of guide rods are fixedly connected to the upper surface of the mobile cart. The outer surfaces of the guide rods are all slidably connected with sliding blocks. Support springs are fixedly sleeved on the outer surfaces of the guide rods. The tops of the support springs are fixedly connected to the bottoms of the sliding blocks. Extrusion blocks are symmetrically and fixedly connected to both sides of the multi-stage electric push rod. The bottoms of the extrusion blocks are all arc-shaped. The arc-shaped bottoms of the extrusion blocks are in extrusion fit with the upper surfaces of the sliding blocks. The multi-stage electric push rod can be supported by the extrusion between the sliding blocks and the extrusion blocks, thereby reducing the force on the multi-stage electric push rod during the reset process.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. When the multi-stage electric push rod drives the sliding plate to slide backward, the present invention can smoothly transfer the patient from the hospital bed to the examination bed, avoiding bumps or shakes that may occur during the transfer process, thereby reducing the risk of the patient falling or being injured. And when automatically transferring the patient, the transfer time can be greatly shortened, enabling the patient to enter the magnetic resonance examination room for examination faster and improving the examination efficiency.

[0016] 2. When the sliding plate slides, the present invention can drive the counterweight block to slide forward, thereby maintaining the overall balance of the mobile cart during the patient transfer, reducing the shaking and tilting of the mobile cart during the transfer, and improving the stability of the transfer. And since the upper surface of the fixed frame is inclined, when the sliding plate moves forward, the counterweight block can automatically slide back to its original position, increasing the overall stability of the mobile cart.

[0017] 3. The guardrail frame and the connecting rod of the present invention can shield the patient on the upper surface of the soft pad, thereby preventing the patient from accidentally falling due to body shaking or sudden movements during the transfer process and improving safety. As the lifting cylinder raises the lifting bed, the guardrail frame and the connecting rod can automatically swing and descend, enabling the patient to move smoothly onto the detection bed without worrying about being blocked by the guardrail frame, improving the convenience of the entire examination process.

[0018] 4. The present invention squeezes the sliding block and the extrusion block, thereby being able to support the multi-stage electric push rod after it swings and resets, reducing the force on the multi-stage electric push rod during the reset process, reducing the risk of the multi-stage electric push rod being damaged due to excessive force, and the sliding block can provide a stable support point, enabling the multi-stage electric push rod to swing according to a predetermined trajectory and angle, thereby improving the accuracy and reliability of the reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0020] Figure 2 It is a cross-sectional view of the pushing component of the present invention.

[0021] Figure 3 This is a schematic structural diagram of the support component of the present invention.

[0022] Figure 4 This is a cross-sectional view of the swing component of the present invention.

[0023] Figure 5 This is a schematic diagram of the mechanism of the counterweight component of the present invention.

[0024] The markings of each component in the drawings are as follows: 1 - mobile cart, 11 - lifting cylinder, 12 - lifting bed, 13 - sliding plate, 14 - soft pad, 15 - protective cover, 16 - mobile frame, 17 - connecting frame, 18 - sliding frame, 19 - multi-stage electric push rod, 110 - elastic cloth, 111 - rotating part, 112 - fixed seat, 2 - fixed frame, 21 - counterweight block, 22 - connecting pull rope, 23 - roller, 3 - guardrail frame, 31 - connecting rod, 32 - turbine, 33 - worm, 4 - guide rod, 41 - sliding block, 42 - support spring, 43 - extrusion block. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Next, a specific implementation example of the present invention will be elaborated in detail in conjunction with the accompanying drawings.

[0027] An auxiliary device for magnetic resonance examination in the ultrasonic department includes a mobile cart 1. The upper surface of the mobile cart 1 is fixedly connected with a plurality of lifting cylinders 11. The mobile cart 1 is used to drive the lifting cylinders 11 to move. The moving ends of the lifting cylinders 11 are fixedly connected with a lifting bed 12. The lifting cylinders 11 are used to drive the lifting bed 12 to move up and down. The upper surface of the lifting bed 12 is slidably connected with a sliding plate 13. The upper surface of the sliding plate 13 is detachably connected with a soft pad 14. The sliding plate 13 is used to drive the soft pad 14 to move, and the soft pad 14 is used to adapt to detection beds of different shapes.

[0028] As described in the background art, when the mobile cart 1 transfers a patient, the patient needs to be manually carried or tilted and transferred to the detection bed. This method of transfer is likely to cause the patient to lose balance, increasing the risk of falling or getting injured. Moreover, manual operation requires more time and labor, which may lead to an extended inspection process, increasing the waiting time of the patient and reducing the inspection efficiency.

[0029] To solve the problem of transfer required, the following technical solution is adopted in this embodiment: A plurality of fixed seats 112 are fixedly connected to one side of the sliding plate 13. A rotating member 111 is rotatably connected to the inner side of the fixed seat 112. A multi-stage electric push rod 19 is fixedly connected to the outer surface of the rotating member 111. When medical staff need to transfer a patient to the examination bed, first, the mobile cart 1 can be pushed to one side of the examination and the lifting cylinder 11 is started. At this time, the moving end of the lifting cylinder 11 can drive the sliding plate 13 to move upward through the lifting bed 12. When the sliding plate 13 moves upward, it will drive the soft pad 14 to move simultaneously, so that the overall height of the soft pad 14 can exceed the height of the examination bed. After the height of the soft pad 14 is adjusted, the multi-stage electric push rod 19 rotates counterclockwise. When the multi-stage electric push rod 19 rotates to the horizontal state, the multi-stage electric push rod 19 is started. At this time, the moving end of the multi-stage electric push rod 19 can drive the fixed seat 112 to move backward through the rotating member 111. When the fixed seat 112 moves backward, it will drive the sliding plate 13 to move simultaneously. When the sliding plate 13 moves backward on the upper surface of the lifting bed 12, it can drive the soft pad 14 to move simultaneously. When the soft pad 14 moves backward, it will drive the patient to move simultaneously, so that the patient can be located on the upper surface of the examination bed. At this time, the medical staff can remove the soft pad 14 from the upper surface of the sliding plate 13. During the removal process of the soft pad 14, the moving end of the multi-stage electric push rod 19 can drive the sliding plate 13 to move forward for reset, so as to place the soft pad 14 on the examination bed. Since the soft pad 14 is soft, the soft pad 14 can adapt to examination beds with different arcs. When the sliding plate 13 slides backward, the patient can be smoothly transferred from the mobile cart 1 to the examination bed, avoiding bumps or shakes that may occur during the transfer process, thereby reducing the risk of the patient falling or being injured.

[0030] A plurality of moving frames 16 are fixedly connected to the bottom of the lifting bed 12 and are used to drive the moving frames 16 to move simultaneously when the lifting bed 12 moves up and down. Sliding frames 18 are slidably connected to the inner sides of the moving frames 16. The moving frames 16 are used to drive the sliding frames 18 to slide. The front sides of the sliding frames 18 are rotatably connected to the rear sides of the multi-stage electric push rods 19. A plurality of connecting frames 17 are fixedly connected to the upper surface of the mobile cart 1. Through holes are formed in the inner sides of the connecting frames 17. The bottom of the sliding groove of the connecting frame 17 is inclined. The outer surface of the rear end of the sliding frame 18 is slidably connected to the sliding groove of the connecting frame 17. The outer surface of the rear end of the sliding frame 18 is in pressing fit with the inner side of the sliding groove of the connecting frame 17. The front side of the left end of the lifting bed 12 is rotatably connected to a protective cover 15. The protective cover 15 is used to shield the upper surface of the mobile cart 1. A plurality of elastic cloths 110 are fixedly connected to the front side of the protective cover 15.

[0031] When the lifting cylinder 11 drives the lifting bed 12 to move upward, the lifting bed 12 can drive the moving frame 16 to move simultaneously. When the moving frame 16 moves upward, it will drive the sliding frame 18 to move simultaneously. When the outer surface of the rear end of the sliding frame 18 is squeezed upward inside the sliding groove of the connecting frame 17, it prompts the sliding frame 18 to move upward and slide forward at the same time. When the sliding frame 18 slides forward, it will drive the multi-stage electric push rod 19 to move simultaneously. Since the moving end of the multi-stage electric push rod 19 rotates inside the fixed seat 112 through the rotating part 111, when the multi-stage electric push rod 19 moves upward, it prompts the multi-stage electric push rod 19 to automatically swing counterclockwise. Therefore, when it is necessary to transfer the patient, the multi-stage electric push rod 19 can be automatically swung to a horizontal state.

[0032] When the sliding plate 13 drives the soft cushion 14 to slide backward, it will cause the overall center of gravity of the mobile cart 1 to shift, which not only affects the overall stability of the mobile cart 1 but also increases the operation difficulty.

[0033] To solve the problem of unstable center of gravity, the following technical solution is adopted in this embodiment: A fixed frame 2 is fixedly connected to the upper surface of the middle part of the mobile cart 1. A counterweight 21 is slidably connected to the upper surface of the fixed frame 2. A plurality of connecting ropes 22 are fixedly connected to the front side of the counterweight 21. The outer surface of the connecting ropes 22 slidably penetrates through the front side of the fixed frame 2. One end of the connecting ropes 22 away from the counterweight 21 is fixedly connected to the front side of the sliding plate 13. When the sliding plate 13 slides, it will drive the counterweight 21 to slide through the connecting ropes 22.

[0034] When the sliding plate 13 slides backward, it will drive the counterweight 21 to slide forward through the connecting ropes 22. When the counterweight 21 slides forward, it can keep the overall center of gravity of the mobile cart 1 balanced. Thus, when transferring the patient, the shaking and tilting of the mobile cart 1 during transfer can be reduced, and the stability of the transfer can be improved.

[0035] The upper surface of the fixed frame 2 is inclined. When the sliding plate 13 slides forward and resets, at this time, the connecting ropes 22 will be in a relaxed state, and the connecting ropes 22 will not pull the counterweight 21. At this time, the counterweight 21 can slide backward along the inclined surface of the upper surface of the fixed frame 2. When the counterweight 21 slides backward, it will drive the bottom end of the connecting ropes 22 to move simultaneously, prompting the connecting ropes 22 to return to the initial state.

[0036] A plurality of rollers 23 are rotatably connected in a straight line inside the fixed frame 2. The bottom of the counterweight 21 is slidably matched with the outer surface of the rollers 23. The outer surfaces of the rollers 23 can enable the counterweight 21 to slide smoothly on the upper surface of the fixed frame 2.

[0037] As the mobile cart 1 is prone to falling during the transfer of patients due to body imbalance or sudden movements, it not only increases the risk of patient injury but may even exacerbate the original condition.

[0038] To solve the problem of patient falling, the following technical solution is adopted in this embodiment: The inner sides of the sliding plates 13 are symmetrically and rotatably connected with guardrail frames 3. Between the tops of the guardrail frames 3, a connecting rod 31 is rotatably connected. When the patient lies on the upper surface of the soft pad 14, the guardrail frames 3 can be rotated counterclockwise at this time. When the guardrail frames 3 rotate, the connecting rod 31 can be driven to rise simultaneously, so that the patient can be blocked between the guardrail frames 3 and the connecting rod 31, thereby preventing the patient from accidentally falling due to body shaking or sudden movements during the transfer and improving safety.

[0039] At the front ends of the front-side guardrail frames 3, turbines 32 are fixedly connected respectively. The outer surfaces of the turbines 32 are threadedly connected with worm gears 33. The left ends of the worm gears 33 are fixedly connected to the right ends of the rotating members 111. When it is necessary to transfer the patient to the examination bed, the lifting bed 12 can drive the moving frame 16 to move upward at this time, and the sliding frame 18 can drive the multi-stage electric push rod 19 to move forward. When the multi-stage electric push rod 19 moves forward, it will cause the multi-stage electric push rod 19 to swing counterclockwise along the moving end. When the moving end of the multi-stage electric push rod 19 swings counterclockwise, it will drive the rotating member 111 to rotate. When the rotating member 111 rotates, it will drive the worm gear 33 to rotate simultaneously. When the worm gear 33 rotates, it will drive the guardrail frame 3 to swing clockwise through the turbine 32. When the guardrail frame 3 swings clockwise, it will drive the connecting rod 31 to move downward, thereby avoiding the guardrail frames 3 and the connecting rod 31 from blocking the patient and improving the convenience of the entire examination process.

[0040] When the patient returns to the upper surface of the mobile cart 1 again, the sliding plate 13 can drive the soft pad 14 to move forward and reset. At this time, the moving end of the lifting cylinder 11 can drive the sliding plate 13 to move downward through the lifting bed 12. When the lifting bed 12 moves downward, it will drive the moving frame 16 to move simultaneously. At this time, the sliding frame 18 can drive the multi-stage electric push rod 19 to move backward and reset. When the multi-stage electric push rod 19 moves backward, the multi-stage electric push rod 19 can swing clockwise along the moving end. When the multi-stage electric push rod 19 swings clockwise, it will drive the rotating member 111 to rotate simultaneously. When the rotating member 111 rotates clockwise, it will drive the worm gear 33 to rotate simultaneously. At this time, the worm gear 33 can drive the guardrail frame 3 to swing counterclockwise through the turbine 32. When the guardrail frame 3 swings counterclockwise, it will drive the connecting rod 31 to move upward, so that the patient can be blocked again between the guardrail frames 3 and the connecting rod 31.

[0041] A plurality of guide rods 4 are fixedly connected to the upper surface of the mobile vehicle 1, and a sliding block 41 is slidably connected to the outer surface of the guide rods 4. A support spring 42 is fixedly connected to the outer surface of the guide rods 4. The top of the support spring 42 is fixedly connected to the bottom of the sliding block 41. The support spring 42 is used to support the sliding block 41. The outer surfaces of both sides of the multi-stage electric push rod 19 are fixedly connected to extrusion blocks 43. The bottom of the extrusion block 43 is arc-shaped, and the arc-shaped bottom of the extrusion block 43 is extruded and matched with the upper surface of the sliding block 41.

[0042] When the multi-stage electric push rod 19 is in a vertical state, the lower surface of the extrusion block 43 can be squeezed by the upper surface of the sliding block 41, so as to support the multi-stage electric push rod 19. As the multi-stage electric push rod 19 swings counterclockwise, the extrusion block 43 is driven to swing at the same time. When the extrusion block 43 swings, the bottom of the extrusion block 43 is forced to separate from the upper surface of the sliding block 41. At this time, the support spring 42 in a compressed state can drive the sliding block 41 to move upward.

[0043] As the multi-stage electric push rod 19 resets and swings clockwise, the extrusion block 43 is driven to swing at the same time. When the extrusion block 43 swings counterclockwise, the arc surface at the bottom of the extrusion block 43 is squeezed with the upper surface of the sliding block 41, and the sliding block 41 is pressed downward on the outer surface of the guide rod 4. When the sliding block 41 moves downward, the supporting spring 42 is prompted to return to the compressed state, so that the sliding block 41 can support the multi-stage electric push rod 19, reduce the stress of the multi-stage electric push rod 19 during the reset process, and reduce the risk of damage to the multi-stage electric push rod 19 due to excessive force. In addition, the sliding block 41 can provide a stable support point, so that the multi-stage electric push rod 19 can swing according to the predetermined trajectory and angle, thereby improving the accuracy and reliability of the reset.

[0044] Although the present disclosure has been shown and described with reference to specific exemplary embodiments of the present disclosure, it should be understood by those skilled in the art that various changes in form and details may be made to the present disclosure without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above-mentioned embodiments, but should be determined not only by the appended claims, but also by the equivalents of the appended claims.

Claims

1. An auxiliary device for magnetic resonance examination in the ultrasound department, comprising a mobile cart (1). A plurality of lifting cylinders (11) are fixedly connected to the upper surface of the mobile cart (1). A lifting bed (12) is fixedly connected between the moving ends of the lifting cylinders (11). A sliding plate (13) is slidably connected to the upper surface of the lifting bed (12). A soft pad (14) is detachably connected to the upper surface of the sliding plate (13), characterized in that, One side of the sliding plate (13) is fixedly connected with a plurality of fixing seats (112), the inner sides of the fixing seats (112) are fixedly connected with rotating members (111), and the outer surfaces of the fixing seats (112) are rotatably connected with multi-stage electric push rods (19).

2. The auxiliary device for nuclear magnetic resonance examination in the ultrasound department according to claim 1, wherein, The bottom of the lifting bed (12) is fixedly connected with a plurality of moving frames (16), the inner sides of the moving frames (16) are slidably connected with sliding frames (18), one side of each sliding frame (18) is rotatably connected to one side of the multi-stage electric push rod (19), the upper surface of the moving vehicle (1) is fixedly connected with a plurality of connecting frames (17), sliding grooves are formed through the inner sides of the connecting frames (17), the bottoms of the sliding grooves of the connecting frames (17) are inclined, the outer surfaces of one sides of the sliding frames (18) are slidably connected in the sliding grooves of the connecting frames (17), the inner sides of the sliding grooves of the connecting frames (17) are in extrusion fit with the outer surfaces of one ends of the sliding frames (18), one side of the lifting bed (12) is rotatably connected with a protective cover (15), and one side of the protective cover (15) is fixedly connected with a plurality of elastic cloths (110).

3. An auxiliary device for magnetic resonance examination in the ultrasound department according to claim 1, characterized in that, The middle part of the upper surface of the moving vehicle (1) is fixedly connected with a fixing frame (2), the outer surface of the top of the fixing frame (2) is slidably connected with a counterweight block (21), one side of the counterweight block (21) is fixedly connected with a plurality of connecting ropes (22), the outer surfaces of the connecting ropes (22) slide through one side of the fixing frame (2), and one ends of the connecting ropes (22) far away from the counterweight block (21) are fixedly connected to one side of the sliding plate (13).

4. An auxiliary device for magnetic resonance examination in the ultrasound department according to claim 3, characterized in that, A plurality of rollers (23) are linearly slidably connected inside the fixing frame (2), and the lower surface of the counterweight block (21) is in sliding fit with the outer surface of the roller (23).

5. An auxiliary device for magnetic resonance examination in the ultrasound department according to claim 4, characterized in that, The upper surface of the fixing frame (2) is inclined.

6. An auxiliary device for magnetic resonance examination in the ultrasound department according to claim 1, characterized in that, A plurality of guardrail frames (3) are rotatably connected inside the sliding plate (13), and a connecting rod (31) is rotatably connected between the tops of the guardrail frames (3).

7. An auxiliary device for magnetic resonance examination in the ultrasound department according to claim 6, characterized in that, One side of one end of the guardrail frame (3) is fixedly connected with a turbine (32), a worm (33) is threadedly connected to the outer surface of the turbine (32), and one end of the worm (33) is fixedly connected to one end of the rotating member (111).

8. An auxiliary device for magnetic resonance examination in the ultrasound department according to claim 1, characterized in that, The upper surface of the moving vehicle (1) is fixedly connected with a plurality of guide rods (4), the outer surfaces of the guide rods (4) are slidably connected with sliding blocks (41), support springs (42) are fixedly sleeved on the outer surfaces of the guide rods (4), the tops of the support springs (42) are fixedly connected to the bottoms of the sliding blocks (41), extrusion blocks (43) are symmetrically and fixedly connected to both sides of the multi-stage electric push rod (19), the bottoms of the extrusion blocks (43) are arc-shaped, and the arc-shaped bottoms of the extrusion blocks (43) are in extrusion fit with the upper surfaces of the sliding blocks (41).

Images