Anti-pressure and anti-electric injury surgical instrument tray capable of automatically ascending and descending

Abstract

The utility model relates to the technical field of medical instruments, in particular to an automatic lifting pressure-proof electric injury-proof surgical instrument tray which comprises a tray assembly, a lifting mechanism and a base assembly which are sequentially arranged and fixedly connected from top to bottom, the lifting mechanism is electrically connected with a control system, and the control system can control the lifting mechanism to drive the tray assembly to ascend or descend; the bottom of the tray assembly is provided with a sensing device used for preventing the tray assembly from being extruded by too low height, and the sensing device is electrically connected with the control system and can control the tray assembly to automatically ascend through the control system. When the sensing device is under pressure, the control system gives an alarm and controls the lifting mechanism to drive the tray assembly to automatically ascend, so that the tray assembly can be prevented from pressing a patient to cause bruise or electric cautery of the patient; the device is reasonable in structure, convenient to use and flexible in height adjustment, the tray assembly can ascend automatically, and the risk that a patient is injured by the tray assembly during an operation is avoided.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to an automatically liftable surgical instrument tray for preventing pressure and electric injury. Background Art

[0002] A surgical instrument tray is a commonly used medical device in clinical surgery, used for placing surgical knives, scissors, forceps, gauze, etc. To facilitate the operator to quickly pick up and place surgical instruments, its position and height are often adjusted. The surgical instrument tray usually extends from the lower limb part of the patient to above the operating table. The closer it is to the patient, the more convenient it is to use. However, at the same time, it is necessary to avoid the instrument tray pressing on the patient, affecting the local blood circulation of the patient's lower limbs, causing pressure sores or even foot joint disorders. And when using an electric scalpel during the operation, the contact between the instrument tray and the patient will act together with the electric scalpel to cause the contact part to heat up, resulting in burns to the patient. Usually, the patient during the operation cannot feedback the sense of pressure by himself, and sometimes the surgical operator cannot observe it in time. Traditionally, the surgical instrument tray uses a screw fixation method, and the screws are located in the middle of the lifting rod. When adjusting the operating table during the operation, since the scrub nurse is in a sterile state and needs to cooperate with the surgical operation, the lifting of the instrument tray cannot be realized, and the circulating nurse needs to assist, which increases the waiting time of the operation and the risk of infection. Therefore, this application provides an automatically liftable surgical instrument tray for preventing pressure and electric injury that can avoid pressing on the patient and does not require manual adjustment. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an automatically liftable surgical instrument tray for preventing pressure and electric injury.

[0004] To solve the above problems, the technical solution adopted by the utility model is:

[0005] An automatically liftable surgical instrument tray for preventing pressure and electric injury, comprising a tray assembly, a lifting mechanism and a base assembly which are fixedly connected in sequence from top to bottom. The lifting mechanism is electrically connected to a control system, and the control system is used to control the lifting mechanism to drive the tray assembly to rise or fall. An induction device for identifying the distance between the tray assembly and the patient is arranged at the bottom of the tray assembly, and the induction device is electrically connected to the control system.

[0006] As an implementation manner of the utility model, the tray assembly further comprises a frame body and a tray. The induction device is arranged at the bottom of the frame body, and the tray is fixed at the top of the frame body.

[0007] As an implementation manner of the present utility model, the frame body includes an L-shaped connecting seat. The bottom of the L-shaped connecting seat is connected to the lifting mechanism, and a frame composed of a plurality of rectangular tubes is arranged on the side surface. The induction device is arranged at the bottom of the frame, and the tray is arranged at the top. Protective corners fixed on the frame are arranged on the outer sides of two corners at the free end of the tray. A U-shaped enclosing plate is arranged at the free end of the bottom surface of the L-shaped connecting seat.

[0008] As an implementation manner of the present utility model, the lifting mechanism includes an outer cylinder. The outer cylinder is fixedly connected to the base assembly. An electric push rod, a linear bearing and a linear guide rod are arranged in the outer cylinder. The cylinder body of the electric push rod is hinged to the base assembly, and the piston rod is fixedly connected to the tray assembly and can drive the tray assembly to lift. The linear guide rod is sleeved in the linear bearing and can slide along the linear bearing. The sleeved assemblies of the two linear guide rods and the linear bearing are respectively arranged on both sides of the electric push rod. The linear bearing is fixedly connected to the outer cylinder, and the top of the linear guide rod is fixedly connected to the tray assembly through a guide rod seat.

[0009] As an implementation manner of the present utility model, the outer cylinder includes a cylinder body and a top seat. The top seat is fixed on the top of the cylinder body through bolts. The top seat is provided with a first through hole and a second through hole. The two second through holes are respectively located on both sides of the first through hole for fixing the linear bearing, and the first through hole is used for passing through the electric push rod. The cylinder body is made of an aluminum alloy elliptical tube.

[0010] As an implementation manner of the present utility model, the guide rod seat includes a connecting flange and a sleeve fixedly connected. A shaft hole penetrating through both ends is arranged in the middle of the connecting flange and the sleeve. A transverse cut groove perpendicular to the axis and a longitudinal cut groove parallel to the axis are arranged on the sleeve. The transverse cut groove penetrates to the center of the shaft hole, and the longitudinal cut groove penetrates to the circumference of the shaft hole. A bolt hole penetrating through the longitudinal cut groove is arranged on the sleeve.

[0011] As an implementation manner of the present utility model, the induction device adopts a strip-shaped safety edge.

[0012] As an implementation manner of the present utility model, the induction device is electrically connected to the control system through a micro-movement travel switch, and the micro-movement travel switch is fixed on the tray assembly.

[0013] As an implementation manner of the present utility model, the base assembly includes a first support pipe and a second support pipe arranged perpendicular to each other. The second support pipe is vertically arranged in the middle of the first support pipe. Universal casters are arranged at both ends of the first support pipe and the free end of the second support pipe. A U-shaped connecting seat is arranged at the upper part of the first support pipe, and the U-shaped connecting seat and the second support pipe are on the same center line.

[0014] As an embodiment of the present utility model, the control system is provided with a control box, a control module, a lifting button, an alarm and a power supply. The control box is fixed on the tray assembly. The control module is fixed in the control box and is electrically connected to the lifting button and the alarm. The lifting button is fixed on the top wall of the control box. The alarm is fixed on the side wall of the control box. The power supply is fixed at the lower part of the lifting mechanism and is electrically connected to the control module.

[0015] The beneficial effects produced by adopting the above technical solution are as follows:

[0016] The automatically liftable anti-pressure and anti-electric shock surgical instrument tray provided by the present utility model includes a tray assembly, a lifting mechanism and a base assembly which are fixedly connected in sequence from top to bottom. The lifting mechanism is electrically connected to the control system. The control system drives the tray assembly to rise or fall by controlling the lifting mechanism. The control system is arranged at the top for easy operation by the operator. A tray is arranged at the top of the tray assembly for easy placement and removal of surgical instruments. An induction device is arranged at the bottom, which can prevent the tray assembly from being too low and squeezing the lower part, causing pressure injury or burn to the patient. The induction device is electrically connected to the control system. The induction device uses a strip-shaped safety touch edge with a large induction area. When the safety touch edge is subjected to pressure, the control system gives an alarm and at the same time controls the tray assembly to automatically rise, which can prevent the tray assembly from pressing and causing pressure injury or electric burn to the patient. The application has a reasonable structure, is convenient to operate and use, has flexible height adjustment, and the tray assembly can automatically rise when pressed, avoiding the risk of the tray assembly causing harm to the patient during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 2 is a three-dimensional structural schematic diagram of another angle of the present utility model;

[0019] Figure 3 is a front view structural schematic diagram of the present utility model;

[0020] Figure 4 is a side view structural schematic diagram of the present utility model;

[0021] Figure 5 is a top view structural schematic diagram of the present utility model;

[0022] Figure 6 is an exploded three-dimensional structural diagram of the present utility model;

[0023] Figure 7 is an exploded three-dimensional structural diagram of another angle of the present utility model;

[0024] Figure 8It is an exploded view of the side view structure of the utility model;

[0025] Figure 9 It is a schematic three-dimensional structure diagram of the guide rod seat of the utility model.

[0026] Wherein: 1. Tray assembly; 1-1. Frame; 1-1-1. L-shaped connecting seat; 1-1-2. Rectangular pipe; 1-1-3. Corner guard; 1-1-4. U-shaped enclosure; 1-2. Tray; 1-2-1. Partition; 1-2-2. Storage area; 1-3. Induction device; 1-4. Microswitch; 2. Lifting mechanism; 2-1. Outer cylinder; 2-1-1. Cylinder body; 2-2-2. Top seat; 2-2-2a. First through hole; 2-2-2b. Second through hole; 2-2. Electric push rod; 2-3. Linear bearing; 2-4. Linear guide rod; 2-5. Guide rod seat; 2-5-1. Connecting flange; 2-5-2. Sleeve; 2-5-3. Axial hole; 2-5-4. Transverse cut groove; 2-5-5. Longitudinal cut groove, 2-5-6. Bolt hole; 3. Base assembly; 3-1. First support pipe; 3-2. Second support pipe; 3-3. Universal caster; 3-4. U-shaped connecting seat; 4. Control system; 4-1. Control box; 4-2. Control module; 4-3. Lifting button; 4-4. Alarm; 4-5. Power supply. Specific embodiments

[0027] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be clearly and completely described below in conjunction with specific embodiments.

[0028] As Figures 1 to 7 shown, an automatically liftable anti-pressure and anti-electric shock surgical instrument tray includes a tray assembly 1, a lifting mechanism 2 and a base assembly 3 which are fixedly connected in sequence from top to bottom. The lifting mechanism 2 is electrically connected to a control system 4. The control system 4 is used to control the lifting mechanism 2 to drive the tray assembly 1 to rise or fall. An induction device 1-3 for identifying the distance between the tray assembly 1 and the patient is provided at the bottom of the tray assembly 1. The induction device 1-3 is electrically connected to the control system 4. When the induction device 1-3 is pressed, the tray assembly 1 can be automatically lifted through the control system 4. In the embodiment of the present application, the control system 4 is arranged at the top for easy operation by the operator. The tray assembly 1 further includes a frame 1-1 and a tray 1-2. The tray 1-2 is fixed on the top of the frame 1-1. The induction device 1-3 is arranged at the bottom of the frame 1-1. When the induction device 1-3 is pressed, the induction signal is transmitted to the control system 4, and the control system 4 starts the lifting mechanism 2 to automatically lift the tray assembly 1.

[0029] As Figures 2 to 7As shown, the frame 1-1 includes an L-shaped connecting seat 1-1-1. The bottom of the L-shaped connecting seat 1-1-1 is connected to the lifting mechanism 2. A frame composed of several rectangular tubes 1-1-2 is arranged on the side. An induction device 1-3 is arranged at the bottom of the frame. The induction device 1-3 is electrically connected to the control system 4 through a micro-movement travel switch 1-4 fixed in the rectangular tube 1-1-2. When the induction device 1-3 is pressed, the micro-movement travel switch 1-4 is triggered, and the induction signal is then fed back to the control system 4. The control system 4 starts the lifting mechanism 2 to rise. In the embodiment of the present application, the micro-movement travel switch 1-4 is selected as the V-156-1C25 type micro-movement travel switch with a long wheel. As Figure 2 shown, two induction devices 1-3 can be arranged at the bottom of the frame 1-1. During use, it should be noted that the part of the tray assembly 1 equipped with the induction device 1-3 should be suspended above the operating table, and it is necessary to avoid only suspending the part without the induction device 1-3 above the operating table. This embodiment can prevent the operator from accidentally touching the induction device 1-3 outside the operating table and causing the tray assembly 1 to rise; it can also be as Figure 6 and Figure 7 shown, multiple induction devices 1-3 are arranged at the bottom of the frame 1-1. In this embodiment during use, any part of the tray assembly 1 can be suspended above the operating table. This structure is convenient to use and there is no need to specifically adjust the placement angle of the tray assembly 1. The induction device 1-3 in the embodiment of the present application adopts a safety edge that can sense pressure. The safety edge is a flexible and bendable long strip-shaped object, and the long strip-shaped induction area is large and suitable for being arranged below the tray assembly 1. A tray 1-2 for storing surgical instruments and auxiliary materials is arranged at the top of the frame. The tray 1-2 is divided into multiple storage areas 1-2-2 by partitions 1-2-1. The sizes of the storage areas 1-2-2 can be the same or different, which is convenient for classifying and placing surgical instruments and auxiliary materials; at the outer sides of two corners at the free end of the tray 1-2, there are corner guards 1-1-3 fixed on the frame. The height of the corner guards 1-1-3 is lower than the height of the tray 1-2. The corner guards 1-1-3 are used to protect the tray 1-2 from being bumped and deformed, and at the same time, the height is slightly lower than that of the tray 1-2, which is convenient for the operator to take and place surgical supplies from the tray 1-2; at the free end of the bottom surface of the L-shaped connecting seat 1-1-1, there is a U-shaped enclosure 1-1-4. The U-shaped enclosure 1-1-4 protects the outside of the connection part between the tray assembly 1 and the lifting mechanism 2 to prevent the connection flange and bolts from touching and hanging the operator or other items. At the same time, the opening end of the U-shaped enclosure 1-1-4 is provided with a large-angle inclination to prevent sharp corners from hurting people and objects.

[0030] As Figure 2 、 Figure 3 and Figure 6 、 Figure 7As shown in the figure, the lifting mechanism 2 includes an outer cylinder 2-1, which is fixedly connected to the base assembly 3. Inside the outer cylinder 2-1, there are an electric push rod 2-2, a linear bearing 2-3, and a linear guide rod 2-4. The cylinder body of the electric push rod 2-2 is hinged to the base assembly 3, and the piston rod is fixedly connected to the tray assembly 1 and can drive the tray assembly 1 to rise or fall. The linear guide rod 2-4 is sleeved inside the linear bearing 2-3 and can slide along the linear bearing 2-3. The sleeved assemblies of the two linear guide rods 2-4 and the linear bearing 2-3 are respectively arranged on both sides of the electric push rod 2-2. The linear bearing 2-3 is fixedly connected to the outer cylinder 2-1. The top of the linear guide rod 2-4 is fixedly connected to the tray assembly 1 through a guide rod seat 2-5. The guide rod seat 2-5 includes a connecting flange 2-5-1 and a sleeve 2-5-2 that are fixedly connected. The middle of the connecting flange 2-5-1 and the sleeve 2-5-2 is provided with an axial hole 2-5-3 that penetrates both ends. The sleeve 2-5-2 has a transverse cut groove 2-5-4 perpendicular to the axis and a longitudinal cut groove 2-5-5 parallel to the axis. The transverse cut groove 2-5-4 penetrates to the center of the axial hole 2-5-3, and the longitudinal cut groove 2-5-5 penetrates to the circumference of the axial hole 2-5-3. The sleeve 2-5-2 is provided with a bolt hole 2-5-6 that penetrates the longitudinal cut groove 2-5-5. The linear guide rod 2-4 is sleeved inside the axial hole 2-5-3 and is firmly fixed with a bolt arranged on the bolt hole 2-5-6. The connecting flange 2-5-1 is fixed to the tray assembly 1 through bolts. The linear guide rod 2-4 can slide inside the linear bearing 2-3 as the tray assembly 1 rises and falls. The linear bearing 2-3 and the linear guide rod 2-4 assembly can ensure that the lifting mechanism 2 does not tilt or rotate during the rising or falling stroke, and at the same time ensure smooth sliding without jamming. The outer cylinder 2-1 includes a cylinder body 2-1-1 and a top seat 2-2-2. The top seat 2-2-2 is fixed to the top of the cylinder body 2-1-1 through bolts. The top seat 2-2-2 is provided with a first through hole 2-2-2a and a second through hole 2-2-2b. The two second through holes 2-2-2b are respectively located on both sides of the first through hole 2-2-2a for fixing the linear bearing 2-3. The first through hole 2-2-2a is used for passing through the piston rod of the electric push rod 2-2. After the piston rod passes through the first through hole 2-2-2a, it is fixedly connected to the tray assembly 1, realizing the lifting of the tray assembly 1 driven by the electric push rod 2-2. In the embodiment of the present application, the cylinder body 2-1-1 is made of an aluminum alloy elliptical tube. The aluminum alloy elliptical tube has high strength and light weight, and its shape has no sharp corners and edges, which is suitable for use in a hospital environment. The linear bearing 2-3 adopts an LMF-LUU series round flange extended linear bearing. In the embodiment of the present application, the LMF16LUU type linear bearing is selected.

[0031] The base assembly 3 includes a first support tube 3-1 and a second support tube 3-2 which are perpendicularly arranged. The second support tube 3-2 is vertically arranged in the middle of the first support tube 3-1. Universal casters 3-3 are arranged at both ends of the first support tube 3-1 and the free end of the second support tube 3-2. The universal casters 3-3 are medical silent casters. The silent casters have no noise interference and are suitable for the surgical environment. In the embodiment of the present application, 3-inch medical silent casters are selected. A U-shaped connection seat 3-4 is arranged on the upper part of the first support tube 3-1. The U-shaped connection seat 3-4 is used to connect and fix the electric push rod 2-2. The U-shaped connection seat 3-4 and the second support tube 3-2 are on the same center line, ensuring that the tray assembly 1 and the lifting mechanism 2 are on the center line of the base assembly 3, with symmetrical structure and good stability.

[0032] The control system 4 is provided with a control box 4-1, a control module 4-2, a lifting button 4-3, an alarm 4-4 and a power supply 4-5. The control box 4-1 is fixed on the tray assembly 1, on one side of the tray 1-2. The lifting button 4-3 is fixed on the top wall of the control box 4-1, facilitating the operator to perform the lifting operation. A wireless control device can also be set in the control module 4-2, and the operator can use a remote control to control the lifting of the lifting mechanism 2. The alarm 4-4 is fixed on the side wall of the control box 4-1. In the embodiment of the present application, a buzzer alarm is selected. The control module 4-2 is fixed in the control box 4-1 and is electrically connected to the lifting button 4-3 and the alarm 4-4. At the same time, the control module 4-2 is electrically connected to the sensing device 1-3 and the electric push rod 2-2. The power supply 4-5 is fixed at the lower part of the lifting mechanism 2 to supply power to the control system 4 and the electric push rod 2-2. The power supply 4-5 has high quality, is arranged at the lower part of the lifting mechanism 2 and in the middle of the base assembly 3, with good overall stability. The power supply 4-5 is provided with a card seat and a removable battery. The battery uses a lithium battery and can be replaced for charging without affecting the use of the whole machine.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatically lifting and lowering anti-pressure and anti-electric injury surgical instrument tray, characterized in that: The invention comprises a tray assembly (1), a lifting mechanism (2) and a base assembly (3) which are fixedly connected in sequence from top to bottom, the lifting mechanism (2) being electrically connected to a control system (4), the control system (4) being used to control the lifting mechanism (2) to drive the tray assembly (1) to rise or fall, and a sensing device (1-3) for identifying the distance between the tray assembly (1) and a patient being provided at the bottom of the tray assembly (1), the sensing device (1-3) being electrically connected to the control system (4).

2. The automatically lifting and lowering pressure-proof and electric-injury-proof surgical instrument tray according to claim 1, characterized in that: The tray assembly (1) further comprises a frame (1-1) and a tray (1-2), the sensing device (1-3) being arranged at the bottom of the frame (1-1), and the tray (1-2) being fixed at the top of the frame (1-1).

3. The automatically lifting and lowering pressure-proof and electric-injury-proof surgical instrument tray according to claim 2 is characterized in that: The frame (1-1) comprises an L-shaped connection seat (1-1-1), the bottom of the L-shaped connection seat (1-1-1) is connected to the lifting mechanism (2), and a frame composed of a plurality of rectangular tubes (1-1-2) is arranged on the side, the sensing device (1-3) is arranged at the bottom of the frame, and the tray (1-2) is arranged on the top, and corner guards (1-1-3) fixed to the frame are arranged on the outer sides of two corners of the free end of the tray (1-2), and a U-shaped enclosure (1-1-4) is arranged at the free end of the bottom surface of the L-shaped connection seat (1-1-1).

4. The automatically lifting and lowering pressure-proof and electric-injury-proof surgical instrument tray according to claim 1, characterized in that: The lifting mechanism (2) comprises an outer cylinder (2-1), the outer cylinder (2-1) being fixedly connected to the base assembly (3), an electric push rod (2-2), a linear bearing (2-3) and a linear guide rod (2-4) being arranged in the outer cylinder (2-1), a cylinder body of the electric push rod (2-2) being hinged to the base assembly (3), a piston rod being fixedly connected to the tray assembly (1) and being able to drive the tray assembly (1) to rise and fall, the linear guide rod (2-4) being sleeved in the linear bearing (2-3) and being able to slide along the linear bearing (2-3), two sleeve components of the linear guide rod (2-4) and the linear bearing (2-3) being respectively arranged on both sides of the electric push rod (2-2), the linear bearing (2-3) being fixedly connected to the outer cylinder (2-1), and the top of the linear guide rod (2-4) being fixedly connected to the tray assembly (1) via a guide rod seat (2-5).

5. The automatically lifting and lowering pressure-proof and electric-injury-proof surgical instrument tray according to claim 4, characterized in that: The outer cylinder (2-1) comprises a cylinder body (2-1-1) and a top seat (2-2-2); the top seat (2-2-2) is fixed to the top of the top seat (2-2-2) by means of bolts; the top seat (2-2-2) is provided with a first through hole (2-2-2a) and a second through hole (2-2-2b); the two second through holes (2-2-2b) are respectively located on both sides of the first through hole (2-2-2a) for fixing the linear bearing (2-3); the first through hole (2-2-2a) is used for passing the electric push rod (2-2); and the cylinder body (2-1-1) is made of an aluminum alloy elliptical tube.

6. The automatically lifting and lowering pressure-proof and electric-injury-proof surgical instrument tray according to claim 4, characterized in that: The guide rod seat (2-5) comprises a connecting flange (2-5-1) and a sleeve (2-5-2) which are fixedly connected. The connecting flange (2-5-1) and the sleeve (2-5-2) are provided with shaft holes (2-5-3) penetrating both ends in the middle. The sleeve (2-5-2) is provided with a transverse groove (2-5-4) perpendicular to the axis and a longitudinal groove (2-5-5) parallel to the axis. The transverse groove (2-5-4) penetrates to the center of the shaft hole (2-5-3), and the longitudinal groove (2-5-5) penetrates to the circumference of the shaft hole (2-5-3). The sleeve (2-5-2) is provided with a bolt hole (2-5-6) penetrating the longitudinal groove (2-5-5).

7. The automatically lifting and lowering pressure-proof and electric-injury-proof surgical instrument tray according to claim 1, characterized in that: The sensing device (1-3) adopts a belt-shaped safety touch edge.

8. The automatically lifting and lowering pressure-proof and electric-injury-proof surgical instrument tray according to claim 1, characterized in that: The sensing device (1-3) is electrically connected to the control system (4) via a micro-motion travel switch (1-4), and the micro-motion travel switch (1-4) is fixed on the tray assembly (1).

9. The automatically lifting and lowering pressure-proof and electric-injury-proof surgical instrument tray according to claim 1, characterized in that: The base assembly (3) comprises a first support tube (3-1) and a second support tube (3-2) which are arranged perpendicularly to each other, the second support tube (3-2) being arranged perpendicularly in the middle of the first support tube (3-1), both ends of the first support tube (3-1) and the free end of the second support tube (3-2) being provided with universal casters (3-3), the upper part of the first support tube (3-1) being provided with a U-shaped connection seat (3-4), the U-shaped connection seat (3-4) and the second support tube (3-2) being located on the same midline.

10. The automatically lifting and lowering pressure-proof and electric-injury-proof surgical instrument tray according to claim 1, characterized in that: The control system (4) is provided with a control box (4-1), a control module (4-2), a lifting button (4-3), an alarm (4-4) and a power supply (4-5); the control box (4-1) is fixed on the tray assembly (1); the control module (4-2) is fixed in the control box (4-1) and is electrically connected to the lifting button (4-3) and the alarm (4-4); the lifting button (4-3) is fixed on the top wall of the control box (4-1); the alarm (4-4) is fixed on the side wall of the control box (4-1); and the power supply (4-5) is fixed on the lower part of the lifting mechanism (2) and is electrically connected to the control module (4-2).

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