Gastrointestinal endoscopy body position fixing device with protection function

Abstract

The invention relates to the technical field of medical equipment, in particular to a gastrointestinal endoscopy body position fixing device with a protection function, which comprises an examination bed and two L-shaped fixing seats fixedly mounted on one side of the examination bed, a rotating rod is rotatably mounted between the two L-shaped fixing seats, and two protection covers fixedly sleeve the rotating rod. An intelligent system of airbag restraint, real-time pressure monitoring and closed-loop feedback control is adopted, the pressure sensor monitors the inner pressure of the airbag in real time and feeds back the inner pressure to the PLC, the PLC intelligently controls air inlet and exhaust of the air pumps, and the air pump restraint assembly is arranged at the bottom of the air pump restraint assembly. The pressure of the air bag is always maintained in a preset safe and comfortable interval, the system can adaptively provide the most appropriate constraint force no matter whether the body of a patient is fat or thin, the pain point that the pressure is uncontrollable by feeling of a traditional bandage is thoroughly solved, the comfort of the patient is greatly improved, and the risk of bruising is avoided.

Description

Technical Field

[0001] This invention relates to the field of medical equipment technology, and specifically to a gastrointestinal endoscopy positioning device with protective functions. Background Technology

[0002] Gastroscopy and colonoscopy are important methods for diagnosing and treating digestive tract diseases. During the examination, patients need to maintain a lateral decubitus position to avoid severe discomfort or unconscious movements caused by the endoscopic procedure, which may lead to serious complications such as mucosal damage, bleeding, or even perforation.

[0003] Currently, wide cloth straps are commonly used in clinical practice to manually bind and immobilize patients' shoulders and knees. This traditional method has many drawbacks: The procedure is cumbersome and inefficient: nurses need to manually wrap and tie knots to secure the endoscopy, which takes up valuable preoperative preparation time and affects the turnover efficiency of the endoscopy center.

[0004] The restraint pressure is uncontrollable and uneven: the tightness of the straps depends entirely on the nurse's feel and experience. If it is too loose, the fixation will fail and there will be safety hazards; if it is too tight, it may compress nerves and blood vessels or cause skin lacerations, resulting in poor patient comfort.

[0005] Poor fit: Patients of different body types need to repeatedly adjust the straps, making it difficult to achieve a quick and accurate fit, especially for obese or thin patients.

[0006] Passive response, unable to adjust in real time: The slight struggles or muscle tension caused by the patient's discomfort during the examination cannot be recognized and reported by the strap system, making it difficult for medical staff to intervene in a timely manner.

[0007] Slow release in emergency situations: In the event of an emergency, multiple knots need to be untied manually, which takes a long time and may delay treatment.

[0008] Therefore, there is an urgent need for a patient positioning fixation device that can achieve rapid, adaptive, intelligent, safe and comfortable positioning to overcome the shortcomings of the aforementioned traditional technologies. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of the prior art and provide a patient positioning fixation device with protective function for gastrointestinal endoscopy. It achieves automated, precise and humanized patient positioning fixation by combining pneumatic restraint with intelligent feedback control.

[0010] To achieve the above objectives, the present invention provides the following technical solution: A protective positioning device for gastrointestinal endoscopy includes an examination bed and two L-shaped fixing seats fixedly installed on one side of the examination bed. A rotating rod is rotatably installed between the two L-shaped fixing seats. Two protective covers are fixedly fitted on the rotating rod. An air pump is installed on the top of each of the two protective covers, and a restraint component is provided at the bottom of each of the two protective covers. The restraint assembly includes an arc-shaped airbag embedded in the inner wall of the protective cover and connected to the air pump inlet and outlet. It also includes multiple pressure sensors fixedly installed inside the protective cover with their monitoring ends extending into the arc-shaped airbag. Limiting strips that are slidably inserted into the inner wall of the protective cover are provided on both sides of the arc-shaped airbag. The restraint assembly also includes several inlet and outlet cylinders embedded in the protective cover and connected to the inner cavity of the arc-shaped airbag. Matching piston plates are slidably installed in the several inlet and outlet cylinders. A connecting rod that extends through the inlet and outlet cylinder and is fixedly connected to the corresponding limiting strip is fixedly connected to one side of the piston plate. Both L-shaped fixed seats are equipped with limiting components on the opposite side to limit the rotation rod.

[0011] Preferably, the top of the examination bed is covered with a soft pad, and an arc-shaped headrest is fixedly installed on the top of the soft pad.

[0012] Preferably, both sides of the two L-shaped fixing seats are provided with through holes, and the inner walls of the two holes are provided with annular grooves. Rotating heads that are fixedly connected to both ends of the rotating rod are rotatably installed in the two holes, and limiting rings that are rotatably installed in the annular grooves are fixedly fitted on the outer ring walls of the two rotating heads.

[0013] Preferably, the inner arc walls of both protective covers are provided with arc-shaped openings through the inner cavity, the two limiting strips slide through the corresponding arc-shaped openings respectively, the two arc-shaped airbags are provided with square openings on the side near the protective covers, and the inlet and outlet ends of the two air pumps are adapted to be inserted into the corresponding square openings.

[0014] Preferably, the surface of the arc-shaped airbag with the square opening is also provided with four insertion holes. The detection ends of several pressure sensors are respectively adapted to pass through the corresponding insertion holes and extend into the arc-shaped airbag. The surface of the arc-shaped airbag with the four insertion holes is also connected to several inlet and outlet pipes. The other ends of the several inlet and outlet pipes are respectively connected to the inner cavity of the corresponding inlet and outlet cylinder.

[0015] Preferably, the bottom of the examination bed is equipped with a tilting assembly, which includes a first electric cylinder and an L-shaped fixing rod that is rotatably mounted on both sides of the first electric cylinder and vertically fixed at the top of the bottom of the examination bed.

[0016] Preferably, the output end of the first electric cylinder is fixedly connected to a telescopic rod, and a connecting arm is fixedly fitted onto the outer wall of the rotating rod. The end of the telescopic rod away from the first electric cylinder is rotatably installed with the connecting arm.

[0017] Preferably, the limiting assembly includes a second electric cylinder fixedly installed on the outside of the L-shaped fixed base. The output end of the second electric cylinder is fixedly connected to a limiting head. The outer ring wall of the limiting head is provided with several strip grooves. The rotating head is provided with a docking hole at the end away from the rotating rod. Several limiting keys arranged in an equally spaced annular array are vertically fixedly installed on the inner wall of the docking hole. The limiting heads are respectively inserted into the corresponding docking holes in a matching manner. At this time, several of the limiting keys are respectively inserted into the corresponding strip grooves in a matching manner.

[0018] Compared with the prior art, the present invention provides a gastrointestinal endoscopy positioning device with protective function, which has the following significant advantages: Intelligent pressure management and ultimate comfort: The core lies in the adoption of an intelligent system that combines "airbag restraint + real-time pressure monitoring + closed-loop feedback control". Pressure sensors monitor the internal pressure of the airbag in real time and feed it back to the PLC controller. The PLC intelligently controls the air pump's intake and exhaust, ensuring that the airbag pressure is always maintained within a preset safe and comfortable range. Regardless of the patient's body size, the system can adaptively provide the most suitable restraint force, completely solving the pain points of traditional straps that are "based on feeling and have uncontrollable pressure", greatly improving patient comfort and avoiding the risk of pressure injury.

[0019] Rapid response and proactive safety intervention: The system can detect slight muscle twitches or struggles that are difficult for the human eye to perceive. Once the pressure fluctuates, the PLC can instruct the air pump to make fine adjustments to counteract the discomfort. When the pressure data is abnormally high (such as when the patient is struggling violently), the system can instantly trigger an emergency release procedure: the air pump quickly draws air to release the restraints, while the electric cylinder drives the protective cover to rotate 90° and open, making room for medical intervention. This proactive safety mechanism is faster and safer than manual untying of the straps.

[0020] Highly efficient directional expansion and rapid control: Through the innovative linkage design of "inlet and outlet cylinder-piston-limiting strip", the airflow pushes the piston synchronously during inflation, causing the limiting strips on both sides to extend rapidly and form a rigid guide groove, which forces the airbag to expand only in the direction of the patient. This not only avoids the time delay and air waste caused by ineffective airbag expansion, but also makes the establishment and release of the restraint force faster and more efficient, significantly shortening the control time.

[0021] Easy to operate and improves medical efficiency: One-button electric flipping and fixation replaces cumbersome manual binding, making it simple for medical staff to operate, greatly reducing preoperative preparation time and speeding up patient turnover in the endoscopy center.

[0022] Reliable structure and high safety: The combination of mechanical and electronic limit switches, along with the self-locking and multiple limit protections of the flipping mechanism, ensures the stability and safety of the equipment in both working and storage states, eliminating the risk of accidental loosening or closure.

[0023] In summary, this invention, through the deep integration of mechatronics and intelligent control technology, not only achieves a leap from "manual" to "intelligent" body positioning, but also brings revolutionary improvements in safety, comfort, and efficiency, possessing extremely high clinical practical value and market promotion prospects. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the patient examination state according to the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention in the patient-unexamined state; Figure 3 This is a schematic diagram of the sliding connection structure of the protective cover and the limiting strip of the present invention; Figure 4 This is a schematic diagram of the arc-shaped airbag structure of the present invention; Figure 5 This is a schematic diagram of the intake and exhaust cylinder and piston plate intake and exhaust sliding structure of the present invention; Figure 6 This is a schematic diagram of the rotating rod and limiting assembly structure of the present invention; Figure 7 This is a schematic diagram of the L-shaped fixed base and rotating rod rotation structure of the present invention; Figure 8 This is a system workflow diagram of the present invention.

[0026] The labels in the diagram represent: 1. Examination bed; 11. Soft cushion; 12. Arc-shaped headrest; 13. L-shaped fixing seat; 14. Rotating rod; 15. Annular groove; 16. Rotating head; 17. Limiting ring; 2. Protective cover; 21. Air pump; 22. Arc-shaped opening; 23. Pressure sensor; 24. Arc-shaped airbag; 25. Square opening; 26. Insertion hole; 27. Inlet and outlet pipes; 28. Limiting strip; 29. ​​Inlet and outlet cylinder; 210. Piston plate; 211. Connecting rod; 31. First electric cylinder; 32. L-shaped fixing rod; 33. Telescopic rod; 34. Connecting arm; 4. Second electric cylinder; 41. Limit head. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] The present invention will be further described below with reference to embodiments.

[0029] Example 1: Reference Figure 1-8 This is the first embodiment of the present invention, a gastrointestinal endoscopy positioning device with protective function, including an examination bed 1 and two L-shaped fixing seats 13 fixedly installed on one side of the examination bed 1. The examination bed 1 adopts a stainless steel frame structure and the surface is covered with medical-grade ABS engineering plastic. The L-shaped fixing seats 13 are precision cast from aluminum alloy. A soft pad 11 is laid on the top of the examination bed 1. The soft pad 11 is made of high-elasticity slow-rebound memory foam and the surface is covered with waterproof and stain-resistant medical PU leather. An arc-shaped headrest 12 is fixedly installed on the top of the soft pad 11. The arc-shaped headrest 12 is made of the same material and process as the soft pad 11. A rotating rod is rotatably installed between the two L-shaped fixing seats 13. 14. The rotating rod 14 is made of 45 steel with chrome plating. Both sides of the two L-shaped fixing seats 13 have through holes. The inner walls of the two holes have annular grooves 15. Rotating heads 16, which are fixedly connected to both ends of the rotating rod 14, are rotatably installed in the two holes. The rotating heads 16 are made of copper-based powder metallurgy oil-impregnated bearing material. The outer ring walls of the two rotating heads 16 are fixedly fitted with limiting rings 17, which are rotatably installed in the annular grooves 15. The limiting rings 17 are made of polytetrafluoroethylene. The ends of the two rotating heads 16 away from the rotating rod 14 have mating holes. The inner walls of the mating holes are vertically fixed with several limiting keys arranged in an equally spaced annular array. Two protective covers 2 are fixedly mounted on the rotating rod 14. The protective covers 2 are made of transparent polycarbonate material, which makes it easy to observe the internal working conditions. The inner wall of the protective cover 2 (the side closer to the patient) is covered with a 5mm thick medical sponge cushioning pad, and the surface of the cushioning pad is covered with a medical PU film to avoid direct contact between the protective cover and the patient's skin and reduce the risk of collision injury. An air pump 21 is installed on the top of each of the two protective covers 2. The air pump 21 is a miniature oil-free silent air pump with a rated voltage of DC24V and a maximum output pressure of 50kPa. A restraint component is set at the bottom of each of the two protective covers 2. The restraint assembly includes an arc-shaped airbag 24 embedded in the inner wall of the protective cover 2 and connected to the air pump 21's inlet and outlet. The arc-shaped airbag 24 is made of medical-grade silicone material with a thickness of 2mm. It also includes multiple pressure sensors 23 fixedly installed inside the protective cover 2, with their monitoring ends extending into the arc-shaped airbag 24. The pressure sensors 23 are MEMS piezoresistive pressure sensors with a range of 0-50kPa, an accuracy of ±0.5%FS, and an output signal of 4-20mA. Limiting strips 28, which slide and insert into the inner wall of the protective cover 2, are fitted to both sides of the arc-shaped airbag 24. The system uses 6061 aluminum alloy profiles with anodized surface treatment. The restraint assembly also includes several inlet and outlet cylinders 29 embedded in the protective cover 2 and connected to the inner cavity of the arc-shaped airbag 24. The inlet and outlet cylinders 29 are precision machined from brass. A matching piston plate 210 is slidably installed in the inlet and outlet cylinders 29. The piston plate 210 is made of polyurethane sealing material and has built-in magnetic elements. A connecting rod 211 is fixedly connected to one side of the piston plate 210, extending through the inlet and outlet cylinder 29 and fixedly connected to the corresponding limit strip 28. The connecting rod 211 is made of 304 stainless steel. The inner arc walls of the two protective covers 2 are provided with arc-shaped openings 22 through the inner cavity. The two limiting strips 28 slide through the corresponding arc-shaped openings 22 respectively. The two arc-shaped airbags 24 are provided with square openings 25 on the side near the protective cover 2. The inlet and outlet ends of the two air pumps 21 are inserted into the corresponding square openings 25 in a matching manner. The surface of the arc-shaped airbag 24 with a square opening 25 also has four insertion holes 26. The detection ends of several pressure sensors 23 are respectively fitted through the corresponding insertion holes 26 and extended into the arc-shaped airbag 24. The surface of the arc-shaped airbag 24 with four insertion holes 26 is also connected to several inlet and outlet pipes 27. The inlet and outlet pipes 27 are medical-grade silicone tubes with an inner diameter of 4mm and a wall thickness of 1mm. The other end of the inlet and outlet pipes 27 are respectively connected to the inner cavity of the corresponding inlet and outlet cylinder 29. A delay valve is connected in series in the air circuit to ensure that the airflow first enters the inlet and outlet cylinder to push the limit strip to fully extend (delay 0.5-1s) before entering the arc-shaped airbag for expansion, so as to avoid the constraint force deviation caused by the non-directional expansion of the airbag. The bottom of the examination bed 1 is equipped with a tilting assembly, which includes a first electric cylinder 31, which is a servo electric cylinder with a rated thrust of 500N, a stroke of 200mm, and a positioning accuracy of ±0.1mm; it also includes an L-shaped fixing rod 32 rotatably mounted on both sides of the first electric cylinder 31 and vertically fixedly mounted on the bottom of the examination bed 1 at the top. The output end of the first electric cylinder 31 is fixedly connected to a telescopic rod 33. A connecting arm 34 is fixedly fitted on the outer wall of the rotating rod 14. The end of the telescopic rod 33 away from the first electric cylinder 31 is rotatably mounted to the connecting arm 34. Mechanical limit switches are installed at both ends of the travel of the telescopic rod 33 of the first electric cylinder 31. When the telescopic rod extends to the horizontal position of the protective cover 2 (working position) or retracts to the vertical position of the protective cover 2 (storage position), the limit switch is triggered to cut off the power supply to the electric cylinder and prevent overtravel. Limit switches are also installed at both ends of the travel of the telescopic rod of the second electric cylinder 4 to control the insertion / exit limit position of the limit head 41.

[0030] Both L-shaped fixed seats 13 are equipped with limiting components on opposite sides to limit the rotation rod 14. The limiting components include a second electric cylinder 4 fixedly installed on the outside of the L-shaped fixed seat 13. The second electric cylinder 4 is a miniature electric push rod with a rated thrust of 200N and a stroke of 50mm. The output end of the second electric cylinder 4 is fixedly connected to a limiting head 41. The limiting head 41 is made of 40Cr alloy steel and has been surface hardened. The outer ring wall of the limiting head 41 has several strip grooves. The limiting head 41 is inserted into the corresponding mating hole in a matching manner. At this time, several limiting keys are inserted into the corresponding strip grooves in a matching manner. Furthermore, the core control system of this fixed device consists of an external PLC controller, the pressure sensor 23, the air pump 21, the first electric cylinder 31, the second electric cylinder 4, and an operation panel (not shown in the figure). The PLC controller is a Siemens S7-1200 series, integrating an analog input module for receiving signals from the pressure sensor 23 and a digital output module for controlling the air pump 21 and the electric cylinders. As the brain of the system, the PLC controller collects signals from all pressure sensors 23 in real time through its built-in analog input module and controls the start, stop, and direction of the air pump 21, as well as the extension and retraction of the first and second electric cylinders 31 and 4, through its digital output module. The system has preset safety pressure threshold ranges (e.g., 10-15 kPa), an overpressure emergency threshold (e.g., 25 kPa), and an underpressure failure threshold (e.g., 5 kPa). The safe pressure threshold range (10-15 kPa) is set based on human tissue capillary perfusion pressure (usually below 4.3 kPa) and critical pressure studies of common medical compression injuries. It aims to provide effective restraint while keeping pressure levels far below those that may cause ischemic tissue damage (usually >32 kPa), thereby fundamentally eliminating the risk of pressure injury.

[0031] The PLC has a built-in automatic control program, and its working logic mainly includes the following steps: Initialization and self-test: After the equipment is powered on, the PLC controls the air pump 21 to draw air to ensure that the arc-shaped airbag 24 is in the emptied state; controls the second electric cylinder 4 to retract to ensure that the limit head 41 is disengaged; controls the first electric cylinder 31 to be in the retracted state to ensure that the protective cover 2 is in the vertical storage position.

[0032] Pressure maintenance mode: During the constraint process, the PLC performs 'removing extreme values ​​and taking the average' processing on the data from the four pressure sensors. If the deviation of a single sensor data from the average value exceeds ±20%, the sensor is determined to be faulty, and the remaining three data channels are used for pressure control. At the same time, a fault alarm is triggered. The PLC continuously runs the PID control algorithm, compares the collected average pressure with the safe pressure threshold range, and dynamically adjusts the speed of the air pump 21 (PWM speed regulation can be used) or briefly starts and stops it to maintain a constant constraint pressure.

[0033] Emergency release mode: When the value of any pressure sensor 23 continuously exceeds the emergency threshold for a preset time (e.g., 0.5 seconds), the PLC immediately interrupts the current program and unconditionally executes the emergency release sequence: a) Control the air pump 21 to reverse and pump air; b) Control the second electric cylinder 4 to retract the limit head 41; c) Control the first electric cylinder 31 to retract the telescopic rod 33, causing the protective cover 2 to flip open.

[0034] System status indication: The PLC displays the current system status and pressure value in real time through indicator lights on the operation panel (such as green light for normal, yellow light for warning, and red light for emergency stop) or on the screen, providing a basis for human-machine interaction.

[0035] All pneumatic pipeline connections use pagoda-type connectors and are secured with pipe clamps. Electrical connections use waterproof connectors. The entire system is protected by an emergency stop button and a leakage current device.

[0036] Example 2: Based on Example 1, Example 2 makes significant improvements to the driving and limiting methods of the constraint components.

[0037] This embodiment omits the pneumatic mechanical linkage structures such as the intake and exhaust pipes 29, piston plates 210, and connecting rods 211. Instead, a miniature linear motor 5 is embedded inside the protective cover 2. The output shaft of the miniature linear motor 5 is directly fixedly connected to the end of the limiting strip 28 via a coupling 51. The drive controller of the miniature linear motor 5 is electrically connected to the PLC controller.

[0038] Work process: When the PLC controller controls the air pump 21 to inflate the arc-shaped airbag 24, it simultaneously sends a pulse signal to the micro linear motor 5, driving its output shaft to extend precisely, thereby pushing the limit bar 28 to slide along the arc-shaped opening 22 to the working position. Its extension stroke and speed can be precisely controlled by the PLC program, no longer depending on the air pressure. Similarly, during deflating, the PLC controller simultaneously instructs the micro linear motor 5 to retract its output shaft, causing the limit bar 28 to retract. The pressure monitoring and closed-loop control process is the same as in Example 1.

[0039] The remaining structure is the same as that in Example 1.

[0040] Example 3: Example 3 combines the features of Example 1 and Example 2, and optimizes the design for the flipping component.

[0041] Difference in power source: In this embodiment, the tilting assembly no longer uses the first electric cylinder 31, but instead uses a low-speed, high-torque servo motor 6 in conjunction with a reducer 61 as the power source. The servo motor 6 is fixedly mounted on the bottom of the inspection bed 1 via a motor mount, and its output shaft is coaxially fixedly connected to one end of the rotating rod 14 via a keyway. The PLC controller controls the rotation angle and speed of the servo motor 6 through pulse control, thereby directly driving the rotating rod 14 to perform precise 90-degree forward and reverse rotation.

[0042] Difference in Limiting Method: This embodiment retains the pneumatic linkage limit bar 28 driving scheme of Embodiment 1 (i.e., including the intake and exhaust pipes 29, piston plates 210, etc.), but adds position feedback. A miniature reed switch 52 is installed at the tail end of the intake and exhaust pipes 29. When the piston plate 210 (with built-in magnet) moves to the fully extended or fully retracted position, it will trigger the corresponding reed switch 52. This switch signal is connected to the PLC controller as a confirmation signal for whether the limit bar 28 is in position, forming a double guarantee.

[0043] Work process: After the PLC controller issues a flip command, it directly drives the servo motor 6 to rotate by a predetermined angle, causing the rotating rod 14 and the protective cover 2 to rotate accurately by 90 degrees. The subsequent constraint process is exactly the same as in Embodiment 1. However, due to the addition of feedback from the reed switch 52, the PLC can not only control the air circuit opening and closing, but also confirm the actual position of the limit bar 28, resulting in higher safety.

[0044] The remaining structure is the same as that in Example 1.

[0045] The working process of this invention is under the centralized control of a PLC controller, and is divided into two modes: routine inspection and emergency release. The specific process is as follows: I. Initial Preparation Stage According to the examination requirements, the patient lies on their side on the examination bed 1, with their head resting on the curved headrest 12, and their body maintaining the position required for the examination.

[0046] Medical staff send a start command to the PLC controller through the control panel.

[0047] After receiving the instruction, the PLC controller first determines that the protective cover 2 is currently in the vertical storage position and locked by the limit components. To ensure that the flipping action is carried out smoothly, the PLC controller first commands the second electric cylinder 4 of the two limit components to operate, causing its output end to retract, driving the limit head 41 to exit from the docking hole of the rotating head 16 at the end of the rotating rod 14, thereby completely releasing the rotation limit on the rotating rod 14; After confirming that the limit is released, the PLC controller controls the first electric cylinder 31 of the flipping assembly to move. The output end of the first electric cylinder 31 pushes the telescopic rod 33 to extend. The telescopic rod 33 drives the rotating rod 14 to rotate between the two L-shaped fixed seats 13 through the connecting arm 34, thereby driving the two protective covers 2 fixed on them to rotate 90 degrees synchronously, so that they change from the vertical storage position to the horizontal working position, and are suspended above the patient's shoulder and knee respectively.

[0048] After the protective cover 2 is flipped into place, the PLC controller immediately activates the second electric cylinder 4 of the two limit components. The output end of the second electric cylinder 4 pushes the limit head 41 forward, so that it is precisely inserted into the docking hole of the rotating head 16 at the end of the rotating rod 14. At this time, the strip groove on the outer wall of the limit head 41 and the limit key on the inner wall of the docking hole engage with each other to form a mechanical interlock, thereby firmly locking the rotating rod 14 and the protective cover 2 on it in the current working position, preventing any displacement or shaking during use.

[0049] II. Intelligent Constraint and Monitoring Phase

[0050] After the protective cover 2 is positioned and locked, the PLC controller issues a command to start the air pumps 21 on the top of the two protective covers 2 to inflate them.

[0051] Compressed air generated by air pump 21 is delivered to the inner cavity of arc-shaped airbag 24 through intake and exhaust pipes 27. At the same time, part of the airflow is diverted to the inner cavity of each intake and exhaust cylinder 29 through several intake and exhaust pipes 27.

[0052] The airflow pressure entering the intake and exhaust cylinders 29 pushes the piston plate 210 to slide. The piston plate 210 drives the corresponding limiting strip 28 to extend outward synchronously along the arc-shaped opening 22 on the inner side wall of the protective cover 2 via the connecting rod 211. The mechanical stroke of the limiting strip 28 is limited by the length of the intake and exhaust cylinders 29. When it is fully extended, it establishes rigid expansion boundaries on both sides of the arc-shaped airbag 24.

[0053] Subsequently, the arc-shaped airbag 24 begins to inflate under the continuous inflation of the air pump 21. Because its sides and rear are blocked by the limiting strip 28 and the inner wall of the protective cover 2, the airbag can only inflate directionally toward one side of the patient's body, thereby quickly and efficiently wrapping around and conforming to the patient's shoulder or knee, generating a flexible restraint force.

[0054] During this process, multiple pressure sensors 23 embedded in the protective cover 2 monitor the pressure changes inside the arc-shaped airbag 24 in real time and continuously transmit the pressure data to the PLC controller.

[0055] The PLC controller compares the received real-time pressure value with the internally preset safe pressure threshold range and performs intelligent PID adjustment through an algorithm. If the pressure is lower than the set value, the air pump 21 is controlled to continue inflating; if the pressure is higher than the set value, the air pump 21 is controlled to stop or reverse the air intake, thereby achieving closed-loop feedback control of the pressure to ensure that patients of different body types can obtain the best restraint and avoid being too loose or too tight.

[0056] During the examination, if the patient experiences slight muscle tremors due to discomfort, it can cause minute fluctuations in the airbag pressure. The pressure sensor 23 can sensitively detect these changes that are difficult for the human eye to observe. The PLC controller can then quickly instruct the air pump 21 to perform a small amount of deflation or replenishment to counteract these fluctuations, maintaining stable pressure and improving patient comfort.

[0057] III. Emergency Release Phase

[0058] If the patient struggles violently or other emergencies occur, the internal pressure of the arc-shaped airbag 24 will rise sharply and instantly exceed the safe pressure limit set by the PLC controller.

[0059] Pressure sensor 23 immediately feeds back this abnormal signal to the PLC controller.

[0060] The PLC controller determines that an emergency has occurred and immediately initiates the fully automatic emergency release procedure: a. First, the PLC controller instructs the air pump 21 to run in reverse at maximum power, rapidly drawing air from the arc-shaped airbag 24 and the air intake and exhaust pipe 29, causing the airbag to collapse rapidly within seconds, completely releasing the physical restraint on the patient.

[0061] b. Almost simultaneously, the PLC controller controls the two second electric cylinders 4 to retract their output ends, causing the limit head 41 to exit from the docking hole of the rotating head 16, thus releasing the rotation lock on the rotating rod 14.

[0062] c. Immediately afterwards, the PLC controller controls the first electric cylinder 31 to retract, and pulls the rotating rod 14 to rotate through the telescopic rod 33 and the connecting arm 34, driving the two protective covers 2 to quickly flip upwards by ninety degrees and return to the vertical storage position, making room for medical staff to carry out emergency treatment.

[0063] The entire emergency release process is automatically and sequentially completed by the PLC controller, with rapid response and reliable operation, maximizing the precious time to ensure patient safety.

[0064] IV. Inspection Completion and Reset

[0065] When the examination is completed normally, medical staff send instructions through the control panel.

[0066] The PLC controller controls the air pump 21 to draw air, causing the arc-shaped airbag 24 to contract, and the limit bar 28 to retract synchronously after the air pressure is released.

[0067] Subsequently, the PLC sequentially controls the second electric cylinder 4 to unlock, and then controls the first electric cylinder 31 to flip the protective cover 2 back to the vertical position.

[0068] Finally, the PLC controls the second electric cylinder 4 to operate again, inserting the limit head 41 into the docking hole and locking the protective cover 2 in the storage position, ready for the next use.

[0069] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gastrointestinal endoscopy positioning device with protective function, comprising an examination bed (1) and two L-shaped fixing seats (13) fixedly installed on one side of the examination bed (1), wherein a rotating rod (14) is rotatably installed between the two L-shaped fixing seats (13), characterized in that, Two protective covers (2) are fixedly mounted on the rotating rod (14). An air pump (21) is installed on the top of each of the two protective covers (2), and a constraint component is provided at the bottom of each of the two protective covers (2). The restraint assembly includes an arc-shaped airbag (24) embedded in the inner wall of the protective cover (2) and connected to the air inlet and outlet of the air pump (21), and also includes multiple pressure sensors (23) fixedly installed in the protective cover (2) with their monitoring ends extending into the arc-shaped airbag (24). Both sides of the arc-shaped airbag (24) are fitted with limiting strips (28) that are slidably inserted into the inner wall of the protective cover (2). The restraint assembly also includes a plurality of air inlet and outlet cylinders (29) embedded in the protective cover (2) and connected to the inner cavity of the arc-shaped airbag (24). The plurality of air inlet and outlet cylinders (29) are slidably installed with matching piston plates (210). One side of the piston plate (210) is fixedly connected with a connecting rod (211) that extends through the air inlet and outlet cylinder (29) and is fixedly connected to the corresponding limiting strip (28). Both L-shaped fixing seats (13) are equipped with limiting components that limit the rotation rod (14) on the opposite side.

2. The gastrointestinal endoscopy positioning device with protective function according to claim 1, characterized in that, The top of the examination bed (1) is covered with a soft pad (11), and an arc-shaped headrest (12) is fixedly installed on the top of the soft pad (11).

3. The gastrointestinal endoscopy positioning device with protective function according to claim 1, characterized in that, Both sides of the two L-shaped fixing seats (13) are provided with circular holes, and the inner walls of the two circular holes are provided with annular grooves (15). Rotating heads (16) that are fixedly connected to both ends of the rotating rod (14) are rotatably installed in the two circular holes. The outer ring walls of the two rotating heads (16) are fixedly fitted with limiting rings (17) that are rotatably installed in the annular grooves (15). The ends of the two rotating heads (16) away from the rotating rod (14) are provided with docking holes. The inner walls of the docking holes are vertically fixed with a number of limiting keys that are distributed in an equally spaced annular array.

4. The gastrointestinal endoscopy positioning device with protective function according to claim 1, characterized in that, The inner arc walls of the two protective covers (2) are provided with arc-shaped openings (22) through the inner cavity. The two limiting strips (28) slide through the corresponding arc-shaped openings (22) respectively. The two arc-shaped airbags (24) are provided with square openings (25) on the side near the protective cover (2). The inlet and outlet ends of the two air pumps (21) are inserted into the corresponding square openings (25) in a matching manner.

5. A gastrointestinal endoscopy positioning device with protective function according to claim 4, characterized in that, The surface of the arc-shaped airbag (24) with the square opening (25) is also provided with four insertion holes (26). The detection ends of several pressure sensors (23) are respectively adapted to pass through the corresponding insertion holes (26) and extend into the arc-shaped airbag (24). The surface of the arc-shaped airbag (24) with the four insertion holes (26) is also connected to several air intake and exhaust pipes (27). The other end of several air intake and exhaust pipes (27) is respectively connected to the inner cavity of the corresponding air intake and exhaust cylinder (29).

6. The gastrointestinal endoscopy positioning device with protective function according to claim 1, characterized in that, The bottom of the examination bed (1) is equipped with a flipping assembly, which includes a first electric cylinder (31) and an L-shaped fixing rod (32) that is rotatably installed on both sides of the first electric cylinder (31) and vertically fixed at the bottom of the examination bed (1).

7. A gastrointestinal endoscopy positioning device with protective function according to claim 6, characterized in that, The output end of the first electric cylinder (31) is fixedly connected to the telescopic rod (33), and the outer wall of the rotating rod (14) is fixedly fitted with a connecting arm (34). The end of the telescopic rod (33) away from the first electric cylinder (31) is rotatably installed with the connecting arm (34).

8. A gastrointestinal endoscopy positioning device with protective function according to claim 3, characterized in that, The limiting component includes a second electric cylinder (4) fixedly installed on the outside of the L-shaped fixed base (13). The output end of the second electric cylinder (4) is fixedly connected to a limiting head (41). The outer ring wall of the limiting head (41) is provided with several strip grooves. The limiting head (41) is inserted into the corresponding docking hole in a matching manner. At this time, several limiting keys are inserted into the corresponding strip grooves in a matching manner.

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