A device for cleaning and caring for foreign objects in a patient's oral cavity and its care method

Abstract

This invention belongs to the field of medical device technology, specifically a device and method for cleaning and caring for foreign objects in the patient's oral cavity. It aims to solve the problems of dirty water entering the trachea during oral rinsing in bedridden patients, tooth injury from mouth openers, and easy clogging of the cleaning device. The device includes two duckbill-shaped pry bars, with a U-shaped plate and a levering mechanism on one side. The levering mechanism drives the two duckbill-shaped pry bars to move back-to-back, separating the patient's upper and lower teeth. A rubber air bladder is located at one end of the main rod. The air bladder inflates to form a barrier that conforms to the patient's hard palate and tongue root. The outer wall of the main rod has an inlet hole and a drain pipe for discharging waste. A sliding ring is slidably fitted on the main rod, with oblique holes on its outer wall. An annular cavity is connected to the sliding ring via a flexible tube for spraying pulsed water into the oral cavity. A spiral conveying plate is located inside the main rod to transport stuck residue. This device is used for cleaning foreign objects from the oral cavity of bedridden patients, reducing the risk of dirty water entering the trachea and minimizing the possibility of choking.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a device for cleaning and caring for foreign objects in a patient's oral cavity and a method thereof. Background Technology

[0002] In clinical medical and nursing work, especially in the emergency department, intensive care unit, and neurology department, we often encounter patients with impaired consciousness, coma, or who are unable to cooperate independently. Due to weakened or absent swallowing reflexes, these patients often accumulate large amounts of secretions, vomit, blood clots, or food debris in their mouths. If these foreign objects are not removed promptly, they can cause discomfort, halitosis, and oral mucosal infection in mild cases, and may even be aspirated into the respiratory tract, leading to aspiration pneumonia, suffocation, or even death. Therefore, timely and effective foreign body removal from the patient's mouth is a crucial nursing measure to ensure airway patency and patient safety. Currently, commonly used methods for oral foreign body removal include using a tongue depressor to assist in opening the mouth, followed by the nurse using forceps to apply cotton balls or gauze for wiping, or using a suction device connected to a suction catheter for aspiration.

[0003] These methods have many shortcomings in practical operation:

[0004] For patients with trismus or strong biting force, it is difficult to pry open the teeth using a tongue depressor alone. In the process of prying open, it is very easy to break the patient's teeth and cause secondary foreign objects (fragments of teeth) to fall out. Ordinary soft bite blocks will be directly crushed when the patient has strong occlusal spasm, which will physically block the cleaning channel passing through it and lose its cleaning ability.

[0005] During the cleaning process, for bedridden patients who cannot get up, when rinsing the oral cavity for foreign objects, the water and detached dirt will slide directly into the throat due to gravity. The existing nursing devices rely on the nurse's hand-eye coordination to suck up the water, which has a time difference and can easily cause dirty water to flow into the trachea, causing fatal aspiration pneumonia.

[0006] Traditional suction tubes have a single function, only capable of negative pressure suction. They are not effective for firmly attached or large foreign objects, and damage to the oral mucosa is unavoidable during the suction process. Summary of the Invention

[0007] This invention addresses several key challenges in oral care for bedridden and unconscious patients, including the risks of mouth openers damaging teeth and being unsuitable for patients with trismus; the potential for aspiration of rinsing fluid and debris into the trachea during oral irrigation, leading to aspiration pneumonia and potentially fatal suffocation; poor cleaning effectiveness and potential mucosal damage from continuous water flow; complex pulse irrigation structures posing a risk of cross-contamination; and the cumbersome and prone-to-clogging nature of negative pressure suction tubes. Based on existing conventional oral care devices, this invention optimizes the overall modular design of oral cavity opening, airway protection, rinsing and cleaning, debris removal, and emergency unblocking. The solution integrates a screw-driven controllable oral cavity opening mechanism, a universal adjustable main rod with an inflatable airbag forming a physical airway barrier, a hydraulically driven pulse irrigation mechanism, a magnetically coupled non-contact fixed-point irrigation mechanism, and a negative pressure suction and manual spiral conveying anti-clogging and debris removal mechanism. This enables safe, controllable, and efficient operation of the entire process for foreign body removal in the oral cavity of bedridden patients. The invention presents a device and method for cleaning and caring for patients with oral foreign bodies.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A patient oral foreign body removal and care device, comprising:

[0010] U-shaped board;

[0011] A prying mechanism is provided inside the U-shaped plate. The prying mechanism includes two duckbill-shaped pry plates. One end of each duckbill-shaped pry plate is provided with a wedge-shaped surface for inserting into the gap between the patient's upper and lower teeth. The prying mechanism is used to drive the two duckbill-shaped pry plates to move in opposite directions to open the patient's oral cavity.

[0012] The main rod is rotatably connected to the annular ring via a swivel ball joint. The annular ring is rotatably connected to the inner wall of the U-shaped plate via a rotating rod, allowing the main rod to be suspended within the U-shaped plate at multiple adjustable angles; and...

[0013] A sewage discharge mechanism is provided on the main rod, and the sewage discharge mechanism includes a rubber airbag provided on the end of the main rod facing the patient's mouth;

[0014] The rubber airbag expands after inflation to form a physical barrier that fits the patient's hard palate and tongue base. The main rod has a cavity that communicates with an external negative pressure device and a sewage inlet that communicates with the cavity. Under negative pressure, the flushed waste enters the cavity through the sewage inlet and is discharged, thereby preventing waste from entering the patient's esophagus due to the obstruction of the rubber airbag.

[0015] In one possible design, the actuating mechanism further includes a bending plate and a connecting rod fixedly connected to the two duckbill-shaped pry plates. The bending plate is rotatably connected to a pivot fixed to the inner wall of the U-shaped plate via a connecting lug. A C-shaped movable seat is slidably connected to the U-shaped plate. The two ends of the connecting rod are rotatably connected to the bending plate and the C-shaped movable seat, respectively. A U-shaped sliding plate is connected to the C-shaped movable seat. The U-shaped sliding plate is threadedly engaged with a threaded rod, and the threaded rod is rotatably connected to the U-shaped plate.

[0016] Rotating the threaded rod drives the U-shaped sliding plate to move, and the connecting rod drives the bending plate to rotate around the axis, thereby causing the two duckbill-shaped pry bars to move in opposite directions to open the patient's mouth.

[0017] In one possible design, the two duckbill-shaped skids are provided with multiple arc-shaped grooves on the opposite sides and are covered with medical-grade thermoplastic elastomer.

[0018] When the patient's mouth is opened, the patient's teeth are locked into the arc-shaped tooth grooves to prevent slippage, while the medical-grade thermoplastic elastomer is used to buffer the biting force and protect the enamel.

[0019] In one possible design, a rinsing mechanism is also included, comprising a sliding ring slidably fitted onto the outer wall of the main rod; the main rod has an annular cavity, which is connected to an external water pump via an injection pipe, and the sliding ring is connected to the annular cavity via a hose, with multiple oblique holes on the outer wall of the sliding ring; rinsing fluid is injected into the annular cavity via the injection pipe, then enters the sliding ring via the hose, and finally sprays out through the oblique holes on the outer wall of the sliding ring to rinse the patient's oral cavity.

[0020] In one possible design, the flushing mechanism further includes a pulse mechanism, which includes a rotating ring rotatably disposed within the sliding ring, the rotating ring having a clearance groove that mates with the oblique hole, and an arc-shaped plate fixed inside the rotating ring; a spray nozzle communicating with the hose is fixed inside the sliding ring, and the outlet of the spray nozzle faces the arc-shaped plate;

[0021] The flushing fluid is sprayed from the nozzle, impacts the arc plate and drives the rotating ring to rotate. When the relief groove is aligned with the oblique hole, the flushing fluid is sprayed out to form a water flow. When the relief groove is misaligned with the oblique hole, the rotating ring blocks the oblique hole, thereby forming a pulsed water flow to break up and flush out the blockage in the tooth.

[0022] In one possible design, a sliding ring connected to a small electric push rod is slidably disposed within the annular cavity, a magnet I is embedded in the sliding ring, and a magnet II that magnetically attracts the magnet I is embedded within the sliding ring;

[0023] The small electric push rod drives the sliding ring to move along the axis of the main rod, and the magnetic attraction drives the sliding ring to move synchronously to rinse different positions in the oral cavity.

[0024] In one possible design, the sewage discharge mechanism further includes a fixed pipe that is fixedly inserted into the main rod. One end of the fixed pipe is connected to the rubber airbag, and the other end is rotatably connected to a hollow shaft. The hollow shaft is rotatably disposed in the cavity and is connected to an air injection pipe.

[0025] An external air pump inflates the rubber airbag through an air injection pipe, a hollow shaft, and a fixed pipe, causing it to expand and form the physical barrier. The expanded rubber airbag forms a concave surface on the side facing the main rod to collect dirt.

[0026] In one possible design, a spiral conveying plate located inside the cavity is fixed to the outer wall of the hollow shaft, and one end of the hollow shaft extends rotatably to the outside of the main rod and is fixedly connected to a rotating head;

[0027] When large pieces of residue get stuck in the cavity, the rotating head drives the hollow shaft and the spiral conveyor plate to rotate, conveying the stuck residue towards the drain pipe and discharging it.

[0028] In one possible design, a protective box is provided inside the annular cavity and fitted around the periphery of the small electric push rod, and multiple LED beads are fixed on the outer wall of the sliding ring;

[0029] It also includes a controller, which is electrically connected to the small electric push rod, the external water pump, the external air pump and the negative pressure equipment respectively, and is used to control their coordinated operation;

[0030] The protective case protects the small electric actuator, and the LED beads provide illumination to the inside of the patient's mouth as the sliding ring moves.

[0031] All components that come into contact with the patient's mouth (duckbill-shaped skid cover, main rod, sliding ring, rubber airbag, delivery hose) are made of medical-grade materials that meet the GB / T16886 medical device biocompatibility standard.

[0032] This invention not only solves the problems of existing technologies such as easy injury to patients, high risk of aspiration, poor cleaning effect, and easy blockage, but also achieves the overall clinical effect of progressive and controllable mouth opening to protect teeth and airway, inflatable airbag physical barrier to eliminate the risk of aspiration, water-driven pulse flushing to prevent cross-contamination, magnetic coupling non-contact fixed-point flushing, and manual spiral delivery to prevent blockage and clear blockage. It significantly improves the safety of oral care operations for bedridden patients, while improving cleaning efficiency and ease of operation. It is suitable for use in clinical scenarios such as emergency department, ICU, and neurology department, and meets the general safety requirements for medical devices.

[0033] A method for using a patient's oral foreign body removal and care device includes the following steps:

[0034] S1. The operator holds a U-shaped plate and inserts two combined duckbill-shaped pry bars into the gap between the patient's teeth. The threaded rod is rotated, and the two C-shaped moving seats are driven to move synchronously through the U-shaped sliding plate. The C-shaped moving seats drive the connecting rod to make the bending plate rotate around the axis. The two duckbill-shaped pry bars rotate in opposite directions to open the oral cavity, and the patient's teeth fall into the arc tooth groove and lock.

[0035] S2. Adjust the main rod using the universal ball and ring to send the uninflated rubber balloon into the back of the patient's mouth. Inflate the hollow shaft and fixed tube through the air injection tube. The rubber balloon expands and fits against the hard palate and the base of the tongue to form a physical barrier. At the same time, turn on the LED light bulb for illumination.

[0036] S3. Start the external water pump. The flushing fluid enters the annular cavity through the injection pipe, enters the sliding ring through the hose, and is sprayed out from the nozzle. The impact of the arc plate drives the rotating ring to rotate, allowing the positioning groove to periodically align with the inclined hole, generating pulse water flow to flush the oral cavity. The sliding ring is driven to move by a small electric push rod. The magnetic attraction of magnet I and magnet II drives the sliding ring to move synchronously, realizing fixed-point flushing.

[0037] S4. Start the negative pressure device to create negative pressure in the cavity of the main rod. The dirt and rinsing fluid in the oral cavity are sucked into the cavity through the inlet and discharged through the drain pipe.

[0038] S5. When the cavity is blocked, the operator drives the hollow shaft to rotate by rotating the rotating head, which causes the spiral conveyor plate to rotate and force the blockage to be pushed to the drain pipe for discharge.

[0039] Beneficial effects: In this invention, the prying mechanism, consisting of a threaded rod, a C-shaped moving seat, a connecting rod, and a bending plate, can open the duckbill-shaped pry bar in a slow and controllable manner, thereby safely separating the patient's upper and lower teeth. The arc-shaped tooth grooves on the duckbill-shaped pry bar can engage with the patient's teeth, increasing the stability after prying and preventing slippage. The medical-grade thermoplastic elastomer covering the pry bar can buffer the pressure on the teeth when force is applied, protecting the enamel from damage.

[0040] In this invention, by setting an inflatable rubber bladder, the bladder forms a physical barrier in the patient's mouth during the cleaning operation, effectively blocking the passage between the back of the mouth and the pharynx, preventing the rinsing fluid and loose foreign objects from entering the esophagus and trachea, reducing the risk of aspiration pneumonia and suffocation, and providing a safety guarantee for the cleaning operation.

[0041] In this invention, the rotating ring is driven by the rinsing liquid to open and close the oblique holes on the sliding ring periodically, thereby generating a pulsed water flow. Compared with the traditional continuous water flow, the water flow has a stronger impact force, which can more effectively break up and peel off stubborn foreign objects attached to the oral mucosa, tongue surface and tooth gaps, thus improving cleaning efficiency.

[0042] In this invention, the rinsing component uses the coupling effect of magnet I and magnet II to enable the sliding ring, which is slidably sleeved outside the main rod, to move synchronously with the sliding ring inside the annular cavity. Combined with the small electric push rod driving the sliding ring, precise control of the position of the sliding ring is achieved, thereby enabling point-to-point or reciprocating rinsing of different areas in the oral cavity, expanding the rinsing range and achieving more comprehensive cleaning.

[0043] In this invention, the sewage discharge mechanism combines negative pressure suction with spiral conveying. Under normal conditions, negative pressure draws in flushing fluid and suspended waste through the cavity and discharges it through the sewage pipe. When large foreign objects block the pipe, the rotating head can be manually rotated to drive the spiral conveying plate on the hollow shaft to rotate, forcibly conveying and discharging the blockage. This solves the problem of easy clogging of the suction pipe and ensures the continuity and reliability of the cleaning work.

[0044] In this invention, a duckbill-shaped pry bar, combined with a prying mechanism, can safely pry open the patient's upper and lower teeth, avoiding tooth damage. The inflated rubber bladder forms a physical barrier, effectively preventing the rinsing fluid and debris from flowing back into the esophagus, reducing the risk of aspiration pneumonia. The pulsed water flow of the rinsing mechanism can break up and flush out impacted objects in the teeth, improving the cleaning effect. The hollow shaft, in conjunction with the spiral conveyor plate, can remove food residue stuck in the cavity, preventing equipment failure. In addition, the movable sliding ring can rinse different parts of the oral cavity, and LED lights provide illumination, making it easy for doctors to see, ensuring the smooth progress of oral cleaning and care for patients in all aspects. Attached Figure Description

[0045] Figure 1 A three-dimensional structural schematic diagram of a patient oral foreign body removal and care device provided by the present invention;

[0046] Figure 2 This is a three-dimensional exploded structural diagram of a patient oral foreign body removal and care device provided by the present invention.

[0047] Figure 3 A three-dimensional structural diagram of the U-shaped plate, C-shaped movable seat and U-shaped sliding plate of the oral foreign body cleaning and care device provided by the present invention;

[0048] Figure 4 This is a three-dimensional structural diagram of the U-shaped plate and main rod of a patient oral foreign body cleaning and care device provided by the present invention;

[0049] Figure 5 A three-dimensional exploded view of the rubber air bladder, main rod, and annular ring of a patient oral foreign body removal and care device provided by the present invention;

[0050] Figure 6 This is a cross-sectional structural diagram of the main rod and rubber air bladder of a patient oral foreign body cleaning and care device provided by the present invention;

[0051] Figure 7 for Figure 6 Enlarged structural diagram at point A in the middle;

[0052] Figure 8 A three-dimensional exploded view of the sliding ring, sliding collar, and small electric push rod of a patient oral foreign body cleaning and care device provided by the present invention;

[0053] Figure 9 A three-dimensional structural diagram of the rotating ring, arc plate, and relief groove of a patient oral foreign body cleaning and care device provided by the present invention;

[0054] Figure 10 This is a three-dimensional structural diagram of the arc-shaped plate and nozzle of a patient's oral foreign body cleaning and care device provided by the present invention;

[0055] Figure 11 This is a three-dimensional exploded cross-sectional view of the hollow shaft and rotating head of a patient's oral foreign body cleaning and care device provided by the present invention.

[0056] In the diagram: 1. Duckbill-shaped skid; 2. Bending plate; 3. Arc-shaped toothed groove; 4. Connecting rod; 5. Connecting ear; 6. U-shaped plate; 7. Rotating shaft; 8. C-shaped moving seat; 9. Support column; 10. Connecting rod; 11. U-shaped sliding plate; 12. Threaded rod; 13. Groove; 14. Rotating rod; 15. Ring; 16. Universal ball; 17. Main rod; 18. Cavity; 19. Hollow shaft; 20. Fixing tube; 21. Rubber airbag; 22. Rotating head; 23. Air injection pipe; 24. Annular cavity; 25. Liquid injection pipe; 26. Small electric push rod; 27. Protective box; 28. Sliding ring; 29. ​​Magnet I; 30. Sliding ring; 31. Hose; 32. Magnet II; 33. Support; 34. Nozzle; 35. Rotating ring; 36. Clearance groove; 37. Arc plate; 38. Angled hole; 39. LED light bead; 40. Sewage inlet; 41. Sewage outlet pipe; 42. Spiral conveyor plate; 43. Anti-slip stripes. Detailed Implementation

[0057] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0058] In one embodiment: Refer to Figures 1-3 A patient oral foreign body removal and care device, relating to the field of medical device technology, includes two duckbill-shaped pry bars 1. Each of the two duckbill-shaped pry bars 1 has a wedge-shaped surface on one side, which is designed to allow the duckbill-shaped pry bars 1 to be smoothly inserted into the gap between the patient's upper and lower teeth. A U-shaped plate 6 is provided on one side of the two duckbill-shaped pry bars 1. A levering mechanism is provided inside the U-shaped plate 6. The levering mechanism is used to move the two duckbill-shaped pry bars 1 in opposite directions by levering them, thereby separating the patient's upper and lower teeth. The levering mechanism includes two rotating shafts 7. The ends of the two rotating shafts 7 that are far apart from each other are respectively fixedly connected to the corresponding inner walls of the U-shaped plate 6. The rotating shafts 7 serve as fulcrums to provide support for the rotation of the duckbill-shaped pry bars 1.

[0059] Reference Figure 1 and Figure 2 Specifically, the bending mechanism also includes four bending plates 2, which are fixed on the side of the two duckbill-shaped pry plates 1 away from the wedge-shaped surface. Each pair of bending plates 2 forms a group, located on the corresponding duckbill-shaped pry plates 1. A connecting rod 4 is fixed between the two bending plates 2 located on the same duckbill-shaped pry plate 1. The connecting rod 4 is used to enhance the structural stability between the two bending plates 2 and prevent them from deforming under force. A connecting lug 5 is fixed at the bottom of each of the two bending plates 2. The two adjacent connecting lugs 5 are rotatably connected to the corresponding rotating shaft 7. In this way, each duckbill-shaped pry plate 1 is rotatably mounted on the U-shaped plate 6 with the rotating shaft 7 as the axis through the bending plates 2 and connecting lugs 5 on it.

[0060] Reference Figures 1-3 Two C-shaped movable seats 8 are slidably connected to the outer wall of the U-shaped plate 6. The top and bottom of the two C-shaped movable seats 8 are rotatably connected to connecting rods 10. The end of each connecting rod 10 away from the C-shaped movable seat 8 is rotatably connected to the corresponding bent plate 2. The same U-shaped sliding plate 11 is fixed on one side of the two C-shaped movable seats 8. The U-shaped sliding plate 11 is slidably connected to the U-shaped plate 6. A threaded rod 12 passes through the U-shaped sliding plate 11. A slider is fixed inside the U-shaped sliding plate 11. The slider slides with the threaded groove of the threaded rod 12, thereby converting the rotational motion of the threaded rod 12 into the linear movement of the U-shaped sliding plate 11. A support column 9 is fixed inside the C-shaped movable seat 8. The position of the support column 9 corresponds to the corresponding connecting rod 10. Its function is to support the C-shaped movable seat 8, enhance the rigidity of the C-shaped movable seat 8, and prevent the C-shaped movable seat 8 from deforming when driving the connecting rod 10.

[0061] Specifically, when it is necessary to pry open the patient's mouth, the two duckbill-shaped pry bar 1 are first placed in a closed position. The operator holds the U-shaped plate 6 and inserts the end of the duckbill-shaped pry bar 1 with the wedge-shaped surface into the gap between the patient's upper and lower teeth. Then, the threaded rod 12 is rotated by a tool or manually. The rotation of the threaded rod 12 drives the U-shaped slide plate 11 to move closer to the duckbill-shaped pry bar 1. The U-shaped slide plate 11 drives the two C-shaped moving seats 8 fixed thereto to move together. The movement of the C-shaped moving seats 8 drives the connecting rod 10 to rotate around its connection point with the bending plate 2. Due to the rotation of the connecting rod 10, a pushing or pulling force is applied to the bending plate 2, forcing the bending plate 2 to rotate around the pivot 7 with its bottom connecting lug 5 as the axis. The two duckbill-shaped pry bar 1 move in opposite directions through their respective bending plates 2, thereby slowly and smoothly prying open the patient's upper and lower teeth. By controlling the number of rotations of the threaded rod 12, the degree of separation of the upper and lower teeth can be precisely controlled to avoid causing unnecessary damage to the patient.

[0062] Reference Figure 2 Furthermore, on the side of the two duckbill-shaped levers 1 that is far apart from each other, i.e. the side that contacts the upper and lower teeth, there are multiple arc-shaped grooves 3. When the duckbill-shaped levers 1 are inserted and spread the upper and lower teeth, the patient's teeth will naturally fall into these arc-shaped grooves 3 and engage with them. This engaging structure can effectively increase the friction between the teeth and the levers, preventing the teeth from slipping off the duckbill-shaped levers 1 during subsequent oral procedures, thus ensuring the stability of the spread mouth position. In order to protect the patient's tooth enamel, a medical-grade thermoplastic elastomer layer is covered on the surface of the side of the two duckbill-shaped levers 1 that is far apart from each other, i.e. the surface that contacts the teeth. This material has a certain degree of flexibility and cushioning effect, which can protect the tooth enamel from damage when spreading the teeth.

[0063] Reference Figure 4 and Figure 5 Rotating rods 14 are rotatably connected to the inner walls of the U-shaped plate 6 on their adjacent sides. An annular ring 15 is fixed between the two rotating rods 14. A universal ball 16 is rolled and embedded in the annular ring 15. The universal ball 16 can roll freely in multiple directions within the annular ring 15. A main rod 17 slides through the center of the universal ball 16. The main rod 17 can slide along its axis within the universal ball 16. Through the cooperation of the annular ring 15, the rotating rods 14, and the universal ball 16, the main rod 17 can achieve multi-angle deflection and axial extension relative to the U-shaped plate 6. This allows the operator to flexibly adjust the front end of the main rod 17 to any position in the patient's oral cavity.

[0064] Reference Figure 5 and Figure 6The main rod 17 is equipped with a drainage mechanism to remove waste from the patient's mouth and prevent it from entering the esophagus. The drainage mechanism includes a rubber air bladder 21 fixed to one end of the main rod 17, located at the end of the main rod 17 facing the patient's mouth. Specifically, the drainage mechanism also includes a cavity 18 disposed within the main rod 17, and an annular cavity 24 coaxial with but located outside the cavity 18. A fixing tube 20 is fixedly inserted through the main rod 17, with one end extending and fixed inside the rubber air bladder 21. A hollow shaft 19 is rotatably connected to one inner wall of the cavity 18, and the other end of the fixing tube 20... The rotation extends into the hollow shaft 19, and the internal space of the rubber airbag 21 is connected to the internal channel of the hollow shaft 19 through the fixed tube 20. The rotational connection between the hollow shaft 19 and the fixed tube 20 is provided with a one-way sealing structure (e.g., a medical-grade lip seal). This structure allows the hollow shaft 19 to rotate relative to the fixed tube 20, while preventing dirt in the cavity 18 from entering the hollow shaft 19 in reverse, ensuring the cleanliness and unobstructed flow of the air injection channel. The end of the hollow shaft 19 away from the fixed tube 20 rotates and extends to the outside of the main rod 17 and is connected to an air injection tube 23. The other end of the air injection tube 23 is connected to an external air pump.

[0065] Specifically, when it is necessary to clean foreign objects from the mouth, after the manipulator has separated the patient's upper and lower teeth, the operator inserts the end of the main rod 17 with the rubber airbag 21 into the mouth of the supine patient through the universal ball 16 and the ring 15. By adjusting the angle and depth of the main rod 17, the rubber airbag 21 is placed at the back of the patient's mouth. Then, the external air pump is started, and gas is injected into the rubber airbag 21 through the air injection tube 23, the hollow shaft 19 and the fixing tube 20. As the gas is injected, the rubber airbag 21 gradually expands. The expanded rubber airbag 21 will fit against the area between the patient's hard palate and the root of the tongue, forming a physical barrier that effectively blocks the passage between the mouth and the esophagus. At the same time, the side of the expanded rubber airbag 21 near the main rod 17, that is, its back side, will form a concave arc surface. This concave structure can collect the rinsing fluid and loose dirt and guide it to the subsequent collection structure.

[0066] Reference Figure 6 The outer wall of the main rod 17 is provided with multiple sewage inlet holes 40. These sewage inlet holes 40 are connected to the cavity 18 inside the main rod 17. A sewage discharge pipe 41 is fixed at one end of the main rod 17 away from the rubber air bag 21. The sewage discharge pipe 41 is connected to the cavity 18, and its other end is connected to the negative pressure equipment outside.

[0067] Specifically, after the rubber airbag 21 inflates to form a barrier, the negative pressure device is activated, creating a negative pressure state inside the cavity 18. At this time, the rinsing fluid and the flushed dirt generated in the oral cavity due to the subsequent rinsing operation are drawn into the cavity 18 through the inlet hole 40 under the suction of the negative pressure, and discharged into the external collection container through the drain pipe 41 along the cavity 18. Due to the obstruction of the rubber airbag 21, the rinsing fluid and dirt cannot enter the esophagus, thus effectively avoiding the risk of aspiration.

[0068] Reference Figures 5-8 This device also includes a rinsing mechanism for rinsing the oral cavity when the main rod 17 is inserted into the patient's mouth. The rinsing mechanism includes a sliding ring 30 that is slidably fitted onto the outer wall of the main rod 17. The rinsing mechanism also includes an annular cavity 24 disposed within the main rod 17. An injection tube 25 connected to the annular cavity 24 is fixed to the end of the main rod 17 away from the rubber air bladder 21. One end of the injection tube 25 is connected to an external water pump for injecting rinsing fluid into the annular cavity 24. The rinsing fluid can be physiological saline or medical mouthwash. Multiple tubes connected to the annular cavity 24 are fixed to the outer wall of the main rod 17. Multiple flexible hoses 31 are located at the end of the main rod 17 near the rubber airbag 21. One end of each hose 31 is fixedly connected to the sliding ring 30 (and the length of each hose 31 is sufficient to allow the sliding ring 30 to reciprocate; the attached diagram is for illustrative purposes only). These hoses are used to introduce rinsing fluid from the annular cavity 24 into the sliding ring 30. The outer wall of the sliding ring 30 is provided with multiple sets of water spray groups. Each set of water spray groups consists of two oblique holes 38, which face opposite directions, one roughly towards the oral cavity and the other roughly towards the teeth, to achieve multi-angle rinsing. To adapt to the moist and liquid working environment in the oral cavity, at least one medical-grade sealing ring (not shown in the figure) is provided between the outer wall of the main rod 17 and the inner wall of the sliding ring 30 to prevent rinsing fluid and dirt from seeping into the sliding pair. At the same time, the small electric push rod 26 and its electrical connection cable are all encapsulated with medical-grade waterproof sealant, and waterproof sealant is provided between the protective box 27 and the inner wall of the main rod 17 to ensure the airtightness of the annular cavity 24. All components that come into contact with the patient's mouth, including the covering layer of the duckbill-shaped skid 1, the main rod 17, the sliding ring 30, and the rubber airbag 21, are made of medical-grade materials that can withstand cleaning with disinfectant or high-temperature and high-pressure sterilization to meet the hygiene standards for medical devices.

[0069] Reference Figures 6-10To improve the rinsing effect, a pulse mechanism is provided in the annular cavity 24 and the sliding ring 30 to form a pulsed water flow of the rinsing liquid discharged through the inclined hole 38. The pulse mechanism includes a rotating ring 35 rotatably connected to the inner wall of the sliding ring 30. The rotating ring 35 is used to periodically close or open the inclined hole 38. Multiple arc-shaped plates 37 are fixed on the inner wall of the rotating ring 35. A support 33 is fixed on one side of the inner wall of the sliding ring 30. A nozzle 34 is fixedly inserted through the support 33. One end of the hose 31 extends into the sliding ring 30 and is fixedly connected to the nozzle 34. The position of the outlet of the nozzle 34 corresponds to the position of the arc-shaped plate 37.

[0070] Specifically, when the flushing fluid enters the nozzle 34 through the hose 31, it is sprayed out at high speed, directly impacting the arc-shaped plate 37. The impact force of the flushing fluid drives the arc-shaped plate 37 to cause the entire rotating ring 35 to rotate continuously within the sliding ring 30. The rotating ring 35 is provided with multiple clearance grooves 36, the positions of which match the positions of the inclined holes 38 on the sliding ring 30. During the rotation of the rotating ring 35, when the clearance grooves 36 rotate to align with the inclined holes 38, the inclined holes 38 are opened, and the flushing fluid in the sliding ring 30 can then pass through the inclined holes 38. The nozzle 38 sprays water outward to rinse the patient's mouth. As the rotating ring 35 continues to rotate, the positioning groove 36 moves away from the position of the oblique nozzle 38, and the main body of the rotating ring 35 blocks the oblique nozzle 38, stopping the spray. As the rotating ring 35 continues to rotate, the oblique nozzle 38 is periodically opened and closed, thereby generating a pulsed flushing water flow. This pulsed water flow can generate a water hammer effect, which can more effectively break up and flush away the debris and dried secretions in the gaps between teeth or on the oral mucosa, thereby improving the thoroughness of cleaning.

[0071] Reference Figure 7 and Figure 8 To achieve targeted irrigation of different locations within the oral cavity, multiple magnets II 32 are fixed inside the sliding ring 30. Correspondingly, a sliding ring 28 is slidably connected within the annular cavity 24. Multiple magnets I 29 are fixedly embedded in the outer wall of the sliding ring 28. Magnets I 29 and magnets II 32 generate a magnetic attraction force through the walls of the annular cavity 24 and the main rod 17. To ensure the reliability of the magnetic transmission, the portion of the main rod 17 located between magnets I 29 and magnets II 32 is non-magnetic. Made of materials such as austenitic medical stainless steel (e.g., 316L) or high-strength medical engineering plastics, magnets I 29 and II 32 are both strongly magnetic neodymium iron boron magnets, whose magnetic attraction is sufficient to drive the sliding ring 30 to slide smoothly on the main rod 17. Even if the rest of the main rod 17 is made of magnetic material, the design of this partially non-magnetic structure ensures the effectiveness of magnetic coupling. A small electric push rod 26 is fixed to the inner wall of the annular cavity 24, and one end of the piston rod of the small electric push rod 26 is fixedly connected to the sliding ring 28.

[0072] Specifically, when it is necessary to move the rinsing position, the small electric push rod 26 is activated, driving the sliding ring 28 to move along the axial direction of the main rod 17. Due to the magnetic attraction between magnet I 29 and magnet II 32, the sliding ring 30 will overcome the friction between itself and the main rod 17 and move synchronously with the sliding ring 28. By controlling the extension and retraction of the small electric push rod 26, the position of the sliding ring 30 on the main rod 17 can be precisely controlled, thereby rinsing the oral cavity at different depths from the gums to the throat. In order to protect the small electric push rod 26, a protective box 27 is fixed on the inner wall of the annular cavity 24, in which the small electric push rod 26 is fitted to prevent the rinsing fluid from corroding it.

[0073] Reference Figure 3 and Figure 7 To facilitate the operator's observation of the oral cavity, multiple LED beads 39 are fixed on the outer wall of the sliding ring 30. When the main rod 17 is inserted into the patient's oral cavity, the LED beads 39 are turned on to provide sufficient and shadowless lighting for the operating area, allowing the doctor to clearly see the location of foreign objects and the cleaning status in the oral cavity. The top of the U-shaped plate 6 is provided with a groove 13, which is used to provide space for the main rod 17 to adjust the angle and avoid interference between the main rod 17 and the U-shaped plate 6.

[0074] This device also includes a controller (not shown in the figure), which can be a microcontroller or a programmable logic controller (PLC). The controller is electrically connected to the small electric push rod 26, the external water pump, the external air pump, the negative pressure device, and the LED beads 39. The controller has a preset control program to coordinate the working sequence of each component: after the rubber airbag 21 is fully inflated, the controller activates the LED beads 39 for illumination and controls the external water pump and negative pressure device to start. At the same time, according to the preset program, it controls the extension and retraction of the small electric push rod 26 to drive the sliding ring 30 to move back and forth, realizing automatic flushing and negative pressure suction of various areas of the oral cavity. When an abnormal flow rate is detected in the drain pipe 41, the controller can issue a prompt, and the operator can manually activate the spiral conveyor plate 42 to unclog it.

[0075] In another embodiment: Refer to Figure 6 and Figure 11 To address the potential presence of large, unchewed food residues that could clog the passage after entering the cavity 18 or become stuck near the inlet 40 and unable to be sucked away by negative pressure, a spiral conveyor plate 42 is fixedly fitted onto the outer wall of the hollow shaft 19 inside the cavity 18. A rotating head 22 is fixedly connected to the end of the hollow shaft 19 away from the rubber air bladder 21. One end of the air injection pipe 23 extends rotatably into the interior of the rotating head 22, allowing the hollow shaft 19 to rotate relative to the air injection pipe 23 while supplying air to the hollow shaft 19. The outer wall of the rotating head 22 is provided with multiple anti-slip stripes 43, making it convenient for the operator to pinch and rotate it by hand.

[0076] Specifically, when foreign objects are found to be blocking or obstructing drainage in the cavity 18, the operator can manually drive the hollow shaft 19 to rotate using the rotating head 22. The rotation of the hollow shaft 19 drives the spiral conveyor plate 42 to rotate synchronously. The spiral conveyor plate 42 is similar to a screw, and its rotation generates a force that conveys to one side, pushing the larger pieces of residue retained in the cavity 18 toward the drain pipe 41, and finally discharging them through the drain pipe 41, thus ensuring the long-term unobstructed flow of the drainage channel.

[0077] A method for using a patient's oral foreign body removal and care device includes the following steps:

[0078] S1. During the oral cavity opening stage, the operator holds the U-shaped plate 6 and inserts one end of the wedge-shaped surface of the two duckbill-shaped levers 1 (which are in a combined state) into the gap between the patient's upper and lower teeth. The wedge-shaped design of the duckbill-shaped levers 1 allows them to smoothly enter the narrow gap between teeth. Subsequently, the operator rotates the threaded rod 12 using a tool. The rotational motion of the threaded rod 12 is converted into the linear movement of the U-shaped slide plate 11 along the length of the U-shaped plate 6 through the cooperation of its threaded groove and the slider inside the U-shaped slide plate 11. The movement of the U-shaped slide plate 11 drives the two C-shaped moving seats 8 fixed thereto to move synchronously. The movement of the C-shaped moving seats 8 drives the connecting rod 10 to rotate around its connection point with the bent plate 2. Due to the connecting rod... The other end of 10 is rotatably connected to the bending plate 2. The bending plate 2 is subjected to the pushing or pulling force of the connecting rod 10. With the connecting ear 5 fixed at its bottom as the fulcrum, it rotates around the rotating shaft 7 fixed to the inner wall of the U-shaped plate 6. The two duckbill-shaped pry bars 1 transmit power through their respective corresponding bending plates 2 and connecting ears 5 to achieve rotation in opposite directions, thereby slowly and steadily opening the patient's upper and lower teeth. During the opening process, the patient's teeth fall into the arc tooth groove 3 on the duckbill-shaped pry bar 1 and form a locking with the arc tooth groove 3 to prevent the teeth from slipping off the pry bar. At the same time, the medical-grade thermoplastic elastomer covering the surface of the duckbill-shaped pry bar 1 contacts the tooth enamel and plays a buffering and protective role.

[0079] S2. After the oral cavity is successfully opened, the barrier establishment and illumination stage begins. The operator adjusts the angle and insertion depth of the main rod 17 using the omnidirectional ball 16 and the ring 15, and inserts the uninflated rubber balloon 21 located at one end of the main rod 17 into the posterior part of the patient's oral cavity, positioning it in the area between the hard palate and the base of the tongue. The rolling of the omnidirectional ball 16 within the ring 15 and the rotation of the rotating rod 14 allow the main rod 17 to achieve flexible positioning in multiple directions and angles. Subsequently, the operator activates the external air pump connected to the air injection tube 23. Gas enters the hollow shaft 19 through the air injection tube 23, and then... 19 Rotate the fixed tube 20 connected to the rubber balloon 21. As the gas is continuously injected, the rubber balloon 21 gradually expands and eventually fits tightly against the patient's hard palate and tongue base, forming a physical barrier that closes the passage between the oral cavity and the esophagus. The expanded rubber balloon 21 forms a concave arc-shaped surface on the side near the main rod 17, which is used to collect rinsing fluid and dirt in subsequent operations. At the same time, the operator turns on multiple LED beads 39 fixed on the outer wall of the sliding ring 30. The light emitted by the LED beads 39 provides illumination for the inside of the oral cavity, allowing the operator to clearly observe the situation inside the oral cavity.

[0080] S3. After the barrier is established, the pulse flushing phase begins. The operator starts the external water pump connected to the injection pipe 25. The flushing fluid enters the annular cavity 24 through the injection pipe 25 and flows along the annular cavity 24. The flushing fluid flows from the annular cavity 24 into multiple hoses 31 connected to the annular cavity 24, and enters the sliding ring 30 through the hoses 31. The flushing fluid entering the sliding ring 30 is guided to the nozzle 34 fixedly connected to the hoses 31, and sprayed out at high speed from the outlet of the nozzle 34. The sprayed flushing fluid directly impacts the arc plate 37 fixed on the inner wall of the rotating ring 35. The impact force of the flushing fluid drives the arc plate 37 to drive the entire rotating ring 35 to rotate continuously within the sliding ring 30. During the rotation of the rotating ring 35, the clearance groove 36 provided on it periodically aligns with the inclined hole 38 on the outer wall of the sliding ring 30. When the clearance groove 36 aligns with the inclined hole 38, the inclined hole 38 is opened, and the flushing fluid in the sliding ring 30 flows through the inclined hole 38. The nozzle 38 sprays water outward to rinse the inside of the patient's mouth. When the clearance groove 36 is misaligned with the oblique nozzle 38, the main body of the rotating ring 35 blocks the oblique nozzle 38, and the spraying stops. As the rotating ring 35 continues to rotate, the oblique nozzle 38 is periodically opened and closed, thereby generating a pulsed rinsing water flow that impacts and breaks up the debris and secretions in the gaps between teeth and on the oral mucosa. During the rinsing process, the operator can change the rinsing position by controlling the small electric push rod 26. The piston rod of the small electric push rod 26 extends and retracts, driving the sliding ring 28, which is fixedly connected to it, to move along the axial direction of the main rod 17 in the annular cavity 24. The magnet I 29 embedded on the sliding ring 28 and the magnet II 32 embedded in the sliding ring 30 generate a magnetic attraction force. Therefore, the movement of the sliding ring 28 will drive the sliding ring 30 to overcome the friction and move synchronously on the outer wall of the main rod 17, thereby achieving targeted rinsing of different depth areas in the oral cavity.

[0081] S4. Simultaneously with the pulse flushing is the negative pressure drainage stage. The operator activates the external negative pressure device connected to the drainage pipe 41, so that the cavity 18 inside the main rod 17 is in a negative pressure state. The flushing fluid and the dirt flushed down in the patient's mouth due to the pulse flushing are sucked into the cavity 18 through the multiple inlet holes 40 on the outer wall of the main rod 17 under the suction of the negative pressure. Since the rubber airbag 21 has been inflated and closed the back of the mouth, the flushing fluid and dirt cannot flow towards the esophagus. They can only be guided by the negative pressure to the inlet holes 40. The dirt and flushing fluid entering the cavity 18 flow along the cavity 18 and are finally discharged into the collection container outside the body through the drainage pipe 41, completing the cleaning and collection of dirt.

[0082] S5. During the negative pressure sewage discharge process, if large, unchewed food residues enter the cavity 18, and if the sewage pipe 41 is not draining smoothly or the negative pressure gauge reading is abnormal, it is determined that the cavity 18 is blocked, affecting the sewage discharge efficiency. At this time, the channel unblocking stage is entered. The operator holds the rotating head 22 and applies rotational force through the anti-slip stripes 43 on its outer wall. The rotation of the rotating head 22 drives the hollow shaft 19 fixedly connected to it to rotate. The rotation of the hollow shaft 19 drives the spiral conveying plate 42 fixedly sleeved on its outer wall to rotate synchronously in the cavity 18. The rotation of the spiral conveying plate 42 generates axial conveying force, pushing the large residues retained in the cavity 18 towards the sewage pipe 41, forcibly conveying them to the sewage pipe 41 and discharging them, thereby unblocking the sewage discharge channel and ensuring that the sewage discharge mechanism can continue to work normally. After unblocking, the negative pressure equipment is restarted to restore normal operation.

[0083] After each use, this device requires rigorous cleaning and disinfection. The operator should disassemble the parts that come into contact with the patient, such as the duckbill-shaped skid 1, main rod 17, sliding ring 30, and rubber airbag 21, and clean them with a medical enzyme cleaner. Depending on the material's tolerance, appropriate sterilization methods such as high-temperature, high-pressure steam sterilization or low-temperature plasma sterilization should be selected. For the internal gas and liquid passages, a dedicated connector should be used to connect to the cleaning equipment, and disinfectant should be injected for circulation disinfection. Then, thoroughly rinse with sterile water and dry to prevent biofilm formation and cross-contamination. It is recommended to regularly check the sealing of the rubber airbag 21 and the mobility of the sliding ring 30, replacing or lubricating as needed.

[0084] However, as is well known to those skilled in the art, the working principle and wiring method of the small electric actuator 26 are conventional means or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0085] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0086] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for cleaning and caring for foreign objects in a patient's oral cavity, characterized in that, include: U-shaped plate (6); The prying mechanism is located inside the U-shaped plate (6). The prying mechanism includes two duckbill-shaped pry plates (1). One end of the two duckbill-shaped pry plates (1) is provided with a wedge-shaped surface for inserting into the gap between the upper and lower teeth of the patient. The prying mechanism is used to drive the two duckbill-shaped pry plates (1) to move in opposite directions to open the patient's oral cavity. The main rod (17) is rotatably connected to the annular ring (15) via a universal ball (16). The annular ring (15) is rotatably connected to the inner wall of the U-shaped plate (6) via a rotating rod (14), allowing the main rod (17) to be suspended within the U-shaped plate (6) at multiple adjustable angles; and, A sewage discharge mechanism is provided on the main rod (17), and the sewage discharge mechanism includes a rubber airbag (21) provided on the end of the main rod (17) facing the patient's mouth. The rubber airbag (21) is used to expand after inflation to form a physical barrier that fits the hard palate and the base of the tongue of the patient. The main rod (17) is provided with a cavity (18) that communicates with an external negative pressure device and a dirt inlet (40) that communicates with the cavity (18). The flushed dirt enters the cavity (18) through the dirt inlet (40) under the action of negative pressure and is discharged, thereby preventing dirt from entering the patient's esophagus under the blockage of the rubber airbag (21).

2. The oral cavity foreign body removal and care device according to claim 1, characterized in that, The prying mechanism also includes a bending plate (2) and a connecting rod (10) fixedly connected to the two duckbill-shaped pry plates (1). The bending plate (2) is rotatably connected to the rotating shaft (7) fixed to the inner wall of the U-shaped plate (6) through the connecting lug (5). A C-shaped moving seat (8) is slidably connected on the U-shaped plate (6). The two ends of the connecting rod (10) are rotatably connected to the bending plate (2) and the C-shaped moving seat (8) respectively. A U-shaped sliding plate (11) is connected to the C-shaped moving seat (8). The U-shaped sliding plate (11) is threadedly engaged with the threaded rod (12), and the threaded rod (12) is rotatably connected to the U-shaped plate (6). Rotating the threaded rod (12) drives the U-shaped sliding plate (11) to move, and through the connecting rod (10) drives the bending plate (2) to rotate around the pivot (7), thereby causing the two duckbill-shaped pry bars (1) to move in opposite directions to open the patient's mouth.

3. The oral cavity foreign body removal and care device according to claim 2, characterized in that, The two duckbill-shaped pry bars (1) are provided with multiple arc-shaped grooves (3) on the side away from each other and are covered with medical-grade thermoplastic elastomer; When the patient’s mouth is opened, the patient’s teeth are inserted into the arc-shaped tooth groove (3) to prevent slippage, while the medical-grade thermoplastic elastomer is used to buffer the biting force and protect the enamel.

4. The oral cavity foreign body removal and care device according to claim 3, characterized in that, It also includes a rinsing mechanism, which includes a sliding ring (30) that is slidably sleeved on the outer wall of the main rod (17); the main rod (17) has an annular cavity (24), the annular cavity (24) is connected to an external water pump through an injection pipe (25), the sliding ring (30) is connected to the annular cavity (24) through a hose (31), and the outer wall of the sliding ring (30) has multiple oblique holes (38); the rinsing fluid is injected into the annular cavity (24) through the injection pipe (25), then enters the sliding ring (30) through the hose (31), and finally sprays out from the oblique holes (38) on the outer wall of the sliding ring (30) to rinse the patient's oral cavity.

5. The oral cavity foreign body removal and care device according to claim 4, characterized in that, The flushing mechanism further includes a pulse mechanism, which includes a rotating ring (35) rotatably disposed within the sliding ring (30), the rotating ring (35) having a clearance groove (36) that mates with the inclined hole (38), and an arc plate (37) fixed inside the rotating ring (35); a spray pipe (34) communicating with the hose (31) is fixed inside the sliding ring (30), and the outlet of the spray pipe (34) faces the arc plate (37). The flushing fluid is sprayed from the nozzle (34), impacts the arc plate (37) and drives the rotating ring (35) to rotate. When the relief groove (36) is aligned with the oblique hole (38), the flushing fluid is sprayed out to form a water flow. When the relief groove (36) is misaligned with the oblique hole (38), the rotating ring (35) blocks the oblique hole (38), thereby forming a pulse water flow to break up and flush out the blockage in the tooth.

6. The oral cavity foreign body removal and care device according to claim 5, characterized in that, The annular cavity (24) is slidably provided with a sliding ring (28) connected to a small electric push rod (26). A magnet I (29) is embedded in the sliding ring (28). A magnet II (32) is embedded in the sliding ring (30) and magnetically attracted to the magnet I (29). The small electric push rod (26) drives the sliding ring (28) to move axially along the main rod (17), and drives the sliding ring (30) to move synchronously through magnetic attraction, so as to rinse different positions in the oral cavity.

7. The oral cavity foreign body removal and care device according to claim 6, characterized in that, The sewage discharge mechanism also includes a fixed pipe (20) that is fixedly installed inside the main rod (17). One end of the fixed pipe (20) is connected to the rubber airbag (21), and the other end is rotatably connected to a hollow shaft (19). The hollow shaft (19) is rotatably installed inside the cavity (18) and is connected to an air injection pipe (23). An external air pump inflates the rubber airbag (21) through an air injection pipe (23), a hollow shaft (19), and a fixed pipe (20), causing it to expand and form the physical barrier. The expanded rubber airbag (21) forms a concave surface on the side facing the main rod (17) to collect dirt.

8. The oral cavity foreign body removal and care device according to claim 7, characterized in that, The hollow shaft (19) has a spiral conveying plate (42) fixed on its outer wall and located in the cavity (18). One end of the hollow shaft (19) extends rotatably to the outside of the main rod (17) and is fixedly connected to a rotating head (22). When large pieces of residue are stuck in the cavity (18), the rotating head (22) drives the hollow shaft (19) and the spiral conveyor plate (42) to rotate, conveying the stuck residue towards the drain pipe (41) and discharging it.

9. A patient oral foreign body removal and care device according to claim 8, characterized in that, The annular cavity (24) is provided with a protective box (27) sleeved on the outer periphery of the small electric push rod (26), and multiple LED beads (39) are fixed on the outer wall of the sliding ring (30). It also includes a controller, which is electrically connected to the small electric push rod (26), the external water pump, the external air pump and the negative pressure equipment respectively, for controlling their coordinated operation; The protective box (27) is used to protect the small electric push rod (26), and the LED beads (39) are used to provide illumination to the inside of the patient's oral cavity when the sliding ring (30) moves.

10. A nursing method for a patient's oral foreign body removal and care device, applied to the patient's oral foreign body removal and care device as described in claim 9, characterized in that, Includes the following steps: S1. The operator holds a U-shaped plate (6), inserts two combined duckbill-shaped pry bar (1) into the gap between the patient's teeth, rotates the threaded rod (12), and drives two C-shaped moving seats (8) to move synchronously through the U-shaped sliding plate (11). The C-shaped moving seats (8) drive the connecting rod (10) to make the bending plate (2) rotate around the rotating shaft (7). The two duckbill-shaped pry bar (1) rotate in opposite directions to open the oral cavity, and the patient's teeth fall into the arc tooth groove (3) and lock. S2. Adjust the main rod (17) through the universal ball (16) and the ring (15), and send the uninflated rubber airbag (21) into the back of the patient's mouth. Inflate the hollow shaft (19) and the fixed tube (20) through the air injection tube (23). The rubber airbag (21) expands and fits against the hard palate and the root of the tongue to form a physical barrier. At the same time, turn on the LED light beads (39) for illumination. S3. Start the external water pump. The flushing liquid enters the annular cavity (24) through the injection pipe (25), enters the sliding ring (30) through the hose (31), and is sprayed out from the nozzle (34). The impact of the arc plate (37) drives the rotating ring (35) to rotate, allowing the positioning groove (36) to periodically align with the inclined hole (38), generating a pulse water flow to flush the oral cavity. The sliding ring (28) is driven to move by the small electric push rod (26). The magnetic attraction of magnet I (29) and magnet II (32) drives the sliding ring (30) to move synchronously, realizing fixed-point flushing. S4. Start the negative pressure device to create negative pressure in the cavity (18) of the main rod (17). The dirt and rinsing fluid in the oral cavity are sucked into the cavity (18) through the inlet hole (40) and discharged through the drain pipe (41). S5. When the cavity (18) is blocked, the operator drives the hollow shaft (19) to rotate by rotating the head (22), causing the spiral conveyor plate (42) to rotate and forcibly push the blockage to the drain pipe (41) for discharge.

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