An oral secretion aspirator

Abstract

The application discloses an oral secretion aspirator and belongs to the technical field of medical equipment. The oral secretion aspirator comprises an aspiration unit and a suction tube, the entry end of the aspiration unit is communicated with the suction tube, a plurality of semispherical protrusions are uniformly arranged on the suction tube along the length direction of the suction tube, and the oral secretion aspirator further comprises a mouthpiece. The mouthpiece is used for being placed in the oral cavity of a patient, the mouthpiece is provided with a perforation, the perforation is sleeved on the suction tube, the hole wall of the perforation is abutted with the plurality of semispherical protrusions, the semispherical protrusions are deformed by being extruded by the hole wall of the perforation, meanwhile, the hole wall of the perforation is provided with a semispherical groove, the suction tube on the mouthpiece is moved so that one of the semispherical protrusions is coincided with the position of the semispherical groove, the semispherical protrusion is reset, and the semispherical protrusion and the semispherical groove are matched in concave-convex mode. The oral secretion aspirator can avoid the problems that the existing suction tube cannot be stably limited in the oral cavity of a patient and cannot be adaptively adjusted in length in the oral cavity.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an oral secretion aspirator. Background Technology

[0002] During nursing care, some patients cannot control their oral secretions, resulting in continuous oral discharge. Sometimes, without timely suctioning, the skin remains moist, affecting the patient's comfort. This is especially true for patients with endotracheal intubation, who cannot swallow saliva when in a prone position. If this is not detected in time, the continuous oral discharge may increase the risk of related pneumonia. In addition, continuous oral discharge soils bed sheets and mattresses, requiring medical staff to change them promptly, increasing their workload.

[0003] Existing oral secretion aspirators typically insert a drainage tube into the patient's mouth, with the other end connected to a negative pressure suction machine. Secretions are then suctioned out using negative pressure. However, this method cannot secure the drainage tube. For example, the oral suction device with publication number CN117157031A describes in paragraph 86 that "by inserting a vacuum suction head into a vacuum suction tube, the internal spaces of the tubes are connected. The vacuum suction head has a suction port at its tip. The operator holds the vacuum suction head near its base and moves it within the oral cavity to perform necessary suction." Because the vacuum suction head in this prior art is tubular, inserting the tube too deeply can irritate the patient's throat, causing nausea and vomiting; inserting it too shallowly can cause the drainage tube to easily slip out of the mouth during suction and cannot be stably positioned within the oral cavity. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems in the prior art and provide an oral secretion aspirator that avoids the problems of existing suction tubes not being able to be stably confined in the patient's mouth and not being able to adaptively adjust the length of the suction tube in the mouth.

[0005] This invention provides an oral secretion aspirator comprising a suction unit and a suction tube. The inlet end of the suction unit is connected to the suction tube. The suction tube has a plurality of hemispherical protrusions evenly distributed along its length. The oral secretion aspirator also includes an occlusal device for placement in the patient's oral cavity. The occlusal device has a perforation, which is fitted onto the suction tube. The wall of the perforation abuts against the plurality of hemispherical protrusions. The hemispherical protrusions are deformed by the pressure of the perforation wall. At the same time, the perforation wall has a hemispherical groove. By moving the suction tube on the occlusal device, one of the hemispherical protrusions coincides with the position of the hemispherical groove. The hemispherical protrusion returns to its original shape, and the hemispherical protrusion and the hemispherical groove engage in a convex-concave fit, thereby restricting the occlusal device onto the suction tube and thus changing the length of the suction tube entering the oral cavity.

[0006] Preferably, the straw has a limiting groove on its outer periphery near the suction unit, a slider is slidably disposed in the limiting groove, a rotating sleeve is fixedly connected to the slider, the rotating sleeve is sleeved on the straw, and the plurality of hemispherical protrusions are evenly distributed on the outer surface of the rotating sleeve along the axial direction of the rotating sleeve; the rotating sleeve has a plurality of scrapers for scraping secretions on its outer periphery at the end away from the suction unit; a first bearing is disposed on the inner wall of the perforation, the outer ring of the first bearing is fixedly connected to the inner wall of the perforation, the inner wall of the inner ring of the first bearing has the hemispherical groove, the rotating sleeve passes through the inner ring of the first bearing, and any hemispherical protrusion on the rotating sleeve can cooperate with the hemispherical groove on the inner ring of the first bearing.

[0007] Preferably, the rotating sleeve includes: a first rotating ring, two connecting rods, and a second rotating ring; a slider is fixedly connected to the inner wall of the first rotating ring, and the first rotating ring is rotatably sleeved on the straw through the slider; the two connecting rods are arranged parallel to each other, and the same end of the two connecting rods is fixedly connected to both sides of the first rotating ring, and a plurality of hemispherical protrusions are fixedly arranged along the length of the connecting rods; the second rotating ring is coaxial with the first rotating ring, and the same other end of the two connecting rods is fixedly connected to the second rotating ring, and a plurality of scrapers are fixedly arranged circumferentially on the end face of the second rotating ring away from the first rotating ring.

[0008] Preferably, the straw is connected to the inlet end of the suction unit via a conduit, and a flared end is provided on the end of the straw away from the suction unit. The flared end is made of elastic material, and multiple reinforcing ribs are evenly arranged in the side wall of the flared end along its generatrix length direction. The flared end has a large end and a small end. The small end is rotatably disposed on the outer periphery of the second rotating ring via a second bearing. Multiple rotating rods are evenly arranged on the outer periphery of the large end. One end of each rotating rod is hinged to the outer wall of the large end, and the other end is rotatably connected to the sleeve. The sleeve is fixedly connected to the bite device.

[0009] Preferably, the inner wall of the straw is fixedly provided with a blade for cutting secretions, and the cross-sectional shape of the blade is crisscross.

[0010] Preferably, the suction unit includes: a collection bottle and an air pump; the top of the collection bottle has an exhaust port and an inlet, the inlet being connected to the suction tube, the bottom of the collection bottle has a drain port, and the drain port is equipped with a normally closed valve; the air pump is located on the exhaust port and is used to expel the air from the collection bottle.

[0011] Preferably, the bottom of the collection bottle is provided with a liquid outlet pipe, the liquid outlet end of which extends into the collection bottle, and the liquid inlet end of the liquid outlet pipe is connected to the liquid outlet end of the storage bladder. The liquid inlet end of the storage bladder is connected to the cleaning fluid, and the liquid inlet end of the storage bladder is provided with a one-way valve that allows the cleaning fluid to enter the collection bottle.

[0012] Preferably, the collection bottle is fixedly mounted on the support, the liquid storage bladder is fixedly mounted on the support, and a handle is rotatably mounted on the support. By rotating the handle, the handle squeezes the liquid storage bladder, thereby squeezing the cleaning fluid in the liquid storage bladder into the collection bottle.

[0013] Preferably, the handle is rotatably mounted on the support at its center, and a sector wheel is fixedly mounted at the end of the handle. The sector wheel meshes with a gear, which is fixed to the outer periphery of the outlet pipe. The outlet pipe is rotatably mounted on the support via a third bearing and rotatably mounted at the bottom of the collection bottle via a sealed bearing. The outlet pipe is vertically positioned and connected to the storage bladder via a flexible tube. A stirring blade is fixedly mounted on the outer periphery of the end of the outlet pipe that extends into the collection bottle.

[0014] Preferably, the bite device is a cuboid structure with a receiving groove on the end face of the cuboid structure, the receiving groove being directly opposite the flared mouth, the bite device having a tongue depressor, and the outer periphery of the large end of the flared mouth having an oropharyngeal support to prevent damage to the oral mucosa and to provide support in the oropharynx.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. When using this oral secretion aspirator, the position of the bite device on the straw can be changed by moving the bite device on the straw. At the same time, the hemispherical protrusion and hemispherical groove mutually restrain each other, which can prevent the bite device from moving freely on the straw. When the bite device is placed in the patient's mouth, it can adaptively adjust the length of the straw in the patient's mouth. This avoids the problems of existing straws not being able to be stably restrained in the patient's mouth and not being able to adaptively adjust the length of the straw in the mouth. It also avoids the straw irritating the patient's throat, causing nausea and vomiting.

[0016] 2. This oral secretion aspirator can scrape and cut away the patient's thick secretions, avoiding the problem of secretions clogging the mouth and causing poor suction.

[0017] 3. Reciprocate the rotation of the handle. The handle squeezes the liquid reservoir, allowing the cleaning solution to enter the collection bottle for cleaning. As the handle rotates, it drives the sector wheel to rotate, which in turn drives the outlet pipe and the stirring blade to rotate. The stirring blade then rotates the cleaning solution, making the inside of the collection bottle cleaner. Attached Figure Description

[0018] Figure 1 This is a first perspective view of the present invention; Figure 2 This is a second perspective view of the present invention; Figure 3 for Figure 1A magnified view of a portion of the mid-occlusal organ; Figure 4 This is a schematic diagram of the bite device of the present invention; Figure 5 This is a schematic diagram showing the position of the limiting groove of the present invention; Figure 6 This is a schematic diagram showing the position of the blade in this invention; Figure 7 This is a schematic diagram of the first bearing of the present invention; Figure 8 This is a schematic diagram of the rotating sleeve of the present invention; Figure 9 This is a schematic diagram of the flared mouth structure of the present invention; Figure 10 A schematic diagram of the structure in the contracted state of the funnel mouth; Figure 11 A schematic diagram of the structure with the bell mouth open; Figure 12 This is a schematic diagram of the structure of the sleeve of the present invention; Figure 13 This is a schematic diagram of the end face structure of the straw of the present invention; Figure 14 This is a schematic diagram of the attraction unit of the present invention; Figure 15 This is a schematic diagram of the fan-shaped wheel and gear mating structure of the present invention; Figure 16 This is a schematic diagram of the installation of the liquid reservoir of the present invention; Figure 17 This is a schematic diagram of the stirring blade structure of the present invention; Figure 18 This is a schematic diagram of the cooperation structure between the air reservoir and the limiting plate of the present invention; Figure 19 This is a schematic diagram of the air reservoir under pressure according to the present invention; Figure 20 This is the first modeling diagram of the present invention; Figure 21 This is the second modeling diagram of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Straw, 2. Suction unit, 3. Hemispherical protrusion, 4. Biting device, 5. Perforation, 6. Hemispherical groove, 7. Limiting groove, 8. Slider, 9. Rotating sleeve, 10. First bearing, 11. Scraper, 12. First rotating ring, 13. Connecting rod, 14. Second rotating ring, 15. Guide tube, 16. Trumpet mouth, 17. Blade, 18. Collection bottle, 19. Exhaust port, 20. Inlet, 21. Suction pump, 22. Drain port, 23. Sector wheel, 24. Discharge pipe, 25. Reservoir, 26. Support, 27. Handle, 28. Gear, 29. Stirring blade, 30. Reinforcing rib, 31. Rotating rod, 32. Sleeve, 33. Tongue depressor, 34. Pad, 34-1. Rubber tube, 34-2. Air reservoir, 34-3. Limiting plate. Detailed Implementation

[0020] 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. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Unless otherwise defined, the technical or scientific terms used herein should be understood in their ordinary sense by one of ordinary skill in the art to which this invention pertains. Words such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “inner,” “outer,” “upper,” “lower,” “far,” “near,” “front,” and “back” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0022] The accompanying drawings in this invention are not strictly drawn to scale, and the specific dimensions and quantity of each structure can be determined according to actual needs. The drawings described in this invention are merely structural schematic diagrams.

[0023] The present invention provides an oral secretion aspirator comprising a suction unit 2 and a suction tube 1. The inlet end of the suction unit 2 is connected to the suction tube 1. The suction tube 1 has a plurality of hemispherical protrusions 3 evenly distributed along its length. The oral secretion aspirator also includes... Figures 1-4Includes: an oral occlusor 4; the oral occlusor 4 is placed in the patient's oral cavity, the oral occlusor 4 has a perforation 5, the perforation 5 is fitted onto the straw 1, and the wall of the perforation 5 abuts against multiple hemispherical protrusions 3, the hemispherical protrusions 3 are deformed by the pressure of the wall of the perforation 5, and at the same time, the wall of the perforation 5 has a hemispherical groove 6. By moving the straw 1 on the oral occlusor 4, one of the hemispherical protrusions 3 coincides with the position of the hemispherical groove 6, the hemispherical protrusion 3 is restored to its original shape, and the hemispherical protrusion 3 and the hemispherical groove 6 are in concave-convex fit, thereby restricting the oral occlusor 4 onto the straw 1, thereby changing the length of the straw 1 entering the oral cavity.

[0024] The outer diameter of the straw 1 is 0.8cm-0.9cm, and the inner diameter is 0.7cm-0.8cm. The diameters of the hemispherical groove 6 and the hemispherical protrusion 3 are both 0.2cm-0.4cm. When using this oral secretion aspirator, the position of the bite device 4 on the straw 1 can be changed by moving the bite device 4 on the straw 1. At the same time, the hemispherical protrusion 3 and the hemispherical groove 6 mutually limit each other, preventing the bite device 4 from moving freely on the straw 1. When the bite device 4 is placed in the patient's mouth, the length of the straw 1 in the patient's mouth can be adaptively adjusted. This avoids the problems of existing straws not being able to be stably confined in the patient's mouth and not being able to adaptively adjust the length of the straw in the mouth. It also further avoids the straw irritating the patient's throat, causing nausea and vomiting.

[0025] In this embodiment, as Figures 5-8 The straw 1 has a limiting groove 7 on its outer periphery near the suction unit 2. A slider 8 is slidably disposed in the limiting groove 7. The slider 8 is fixedly connected to a rotating sleeve 9. The rotating sleeve 9 is sleeved on the straw 1. The plurality of hemispherical protrusions 3 are evenly distributed on the outer surface of the rotating sleeve 9 along the axial direction of the rotating sleeve 9. The rotating sleeve 9 has a plurality of scrapers 11 for scraping off secretions on its outer periphery at the end away from the suction unit 2. The inner wall of the perforation 5 is provided with a first bearing 10. The outer ring of the first bearing 10 is fixedly connected to the inner wall of the perforation 5. The inner wall of the inner ring of the first bearing 10 is provided with the hemispherical groove 6. The rotating sleeve 9 passes through the inner ring of the first bearing 10. Any hemispherical protrusion 3 on the rotating sleeve 9 can cooperate with the hemispherical groove 6 on the inner ring of the first bearing 10.

[0026] The slider 8 is preferably a slip ring with an inner diameter of 0.65cm-0.75cm, an outer diameter of 0.85cm-0.95cm, and a thickness of 0.2cm. The scraper 11 has rounded edges at all corners and a thickness of 0.2cm.

[0027] Because patients' conditions vary, the viscosity of their secretions also varies. When a patient's secretions are highly viscous and there is a lot of secretion, it is easy to clog the port of the straw 1. To avoid the above problems, a scraper 11 that can scrape off secretions is designed.

[0028] When using this oral secretion aspirator, the patient or medical staff manually rotates the rotating sleeve 9 outside the mouth. The rotating sleeve 9 drives the scraper 11 located inside the mouth to rotate, scraping away the secretions at the end of the suction tube 1, so that the secretions can enter the suction tube 1 more smoothly.

[0029] In this embodiment, as Figures 6-8 The rotating sleeve 9 includes: a first rotating ring 12, two connecting rods 13, and a second rotating ring 14; a slider 8 is fixedly connected to the inner wall of the first rotating ring 12, and the first rotating ring 12 is rotatably sleeved on the straw 1 through the slider 8; the two connecting rods 13 are arranged parallel to each other, and the same end of the two connecting rods 13 is fixedly connected to the two sides of the first rotating ring 12 respectively, and a plurality of hemispherical protrusions 3 are fixedly arranged along the length of the connecting rods 13; the second rotating ring 14 is coaxially arranged with the first rotating ring 12, and the same other end of the two connecting rods 13 is fixedly connected to the second rotating ring 14, and a plurality of scrapers 11 are fixedly arranged circumferentially on the end face of the second rotating ring 14 away from the first rotating ring 12.

[0030] It can reduce the overall weight of the rotating sleeve 9, and by observing the rotation angle of the two connecting rods 13, the number of rotations and the rotation process of the rotating sleeve 9 can be more clearly seen.

[0031] In this embodiment, as Figures 1-3 , Figures 9-12 and Figures 20-21 The straw 1 is connected to the inlet end of the suction unit 2 through the conduit 15, and the end of the straw 1 away from the suction unit 2 is provided with a flared mouth 16. The flared mouth 16 is made of elastic material, and a plurality of reinforcing ribs 30 are evenly arranged in the side wall of the flared mouth 16 along its generatrix length direction. The flared mouth 16 has a large end and a small end. The small end is rotatably arranged on the outer periphery of the second rotating ring 14 through a second bearing. A plurality of rotating rods 31 are evenly arranged on the outer periphery of the large end. One end of each rotating rod 31 is hinged to the outer wall of the large end, and the other end is rotatably connected to the sleeve 32. The sleeve 32 is fixedly connected to the bite device 4.

[0032] The flared end 16 increases the suction area of ​​the straw 1 in the oral cavity, improving the efficiency of suctioning secretions. The flared end 16 is made of silicone, rubber, or soft plastic. After the patient bites down on the bite block 4, they push the straw 1 to change the shape of the flared end 16 in the oral cavity. The closer the straw 1 is to the inside of the oral cavity, the wider the opening of the large end of the flared end 16, resulting in a larger suction area. Conversely, the further the straw 1 is to the outside of the oral cavity, the smaller the opening of the large end of the flared end 16, resulting in a smaller suction area. The inner reinforcing rib 30 on the side wall of the flared end 16 ensures that the generatrix of the flared end 16 remains straight and allows the large end of the flared end 16 to contract in the diametrical direction.

[0033] In this embodiment, as Figure 6 and Figure 13 The inner wall of the straw 1 is fixedly provided with a blade 17 for cutting secretions, and the cross-sectional shape of the blade 17 is crisscross.

[0034] Blade 17 cuts the secretions flowing through straw 1 into multiple small pieces, making it easier for the secretions to move more smoothly inside straw 1 and avoiding the problem of large pieces of secretions clogging straw 1.

[0035] In this embodiment, as Figures 1-2 and Figure 14 The suction unit 2 includes a collection bottle 18 and an air pump 21. The top of the collection bottle 18 has an exhaust port 19 and an inlet 20. The inlet 20 is connected to the suction tube 1. The bottom of the collection bottle 18 is provided with a drain port 22, and a normally closed valve is provided on the drain port 22. The air pump 21 is provided on the exhaust port 19 and is used to exhaust the air in the collection bottle 18.

[0036] Start the suction pump 21. The suction pump 21 extracts air from the collection bottle 18, creating a negative pressure inside the bottle. This allows the suction tube 1 to smoothly draw out secretions from the patient's mouth. After the secretions enter the collection bottle 18, they accumulate at the bottom of the collection bottle 18 due to gravity. Air is discharged from the exhaust port 19 at the top of the collection bottle 18. To prevent odors from emanating from the exhaust port 19, a filter can be installed at the end of the exhaust port 19 to filter out odors and water molecules. After use, turn off the suction pump 21 and open the normally closed valve on the drain port 22 to discharge the secretions. Samples of the secretions can then be taken and sent for testing. After sampling, close the normally closed valve.

[0037] In this embodiment, as Figures 14-16 The bottom of the collection bottle 18 is provided with a liquid outlet pipe 24. The liquid outlet end of the liquid outlet pipe 24 extends into the collection bottle 18, and the liquid inlet end of the liquid outlet pipe 24 is connected to the liquid outlet end of the liquid storage bladder 25. The liquid inlet end of the liquid storage bladder 25 is connected to the cleaning fluid, and the liquid inlet end of the liquid storage bladder 25 is provided with a one-way valve to allow the cleaning fluid to enter the collection bottle 18.

[0038] By squeezing the reservoir 25, the cleaning fluid inside the reservoir 25 can enter the collection bottle 18 through the outlet pipe 24, thereby cleaning the inside of the collection bottle 18.

[0039] In this embodiment, as Figures 14-16 The collection bottle 18 is fixedly mounted on the bracket 26, and the liquid storage bladder 25 is fixedly mounted on the bracket 26. A handle 27 is rotatably mounted on the bracket 26. By rotating the handle 27, the handle 27 squeezes the liquid storage bladder 25, thereby squeezing the cleaning fluid in the liquid storage bladder 25 into the collection bottle 18.

[0040] Rotate handle 17 back and forth, and handle 17 squeezes the liquid storage bladder 25, so that the cleaning fluid enters the collection bottle 18.

[0041] In this embodiment, as Figures 14-17 The handle 27 is rotatably mounted on the bracket 26 at its middle part. A sector wheel 23 is fixedly mounted at the end of the handle 27. The sector wheel 23 meshes with a gear 28. The gear 28 is fixed to the outer periphery of the outlet pipe 24. The outlet pipe 24 is rotatably mounted on the bracket 26 via a third bearing. The outlet pipe 24 is rotatably mounted at the bottom of the collection bottle 18 via a sealed bearing. The outlet pipe 24 is vertically arranged and is connected to the storage bladder 25 via a hose. A stirring blade 29 is fixedly mounted on the outer periphery of the end of the outlet pipe 24 that extends into the collection bottle 18.

[0042] As the handle 17 rotates back and forth, the handle 17 drives the sector wheel 23 to drive the gear 28 to rotate. The gear 28 drives the liquid outlet pipe 24 and the stirring blade 29 to rotate together. The stirring blade 29 drives the cleaning liquid to rotate, making the inside of the collection bottle 18 cleaner.

[0043] In this embodiment, as Figures 3-4 and Figures 9-11 The bite device 4 has a cuboid structure with a receiving groove on the end face of the cuboid structure. The receiving groove is directly opposite the flared mouth 16. The bite device 4 has a tongue depressor 33. The outer periphery of the large end of the flared mouth 16 has an oropharyngeal support 34 to prevent damage to the oral mucosa and to provide support in the oropharynx.

[0044] The oropharyngeal support 34 includes an annular cushion or an adaptive airbag ring, both made of either rubber or silicone, to prevent damage to the oral mucosa.

[0045] As another implementation method of this embodiment, such as Figures 18-19When the oropharyngeal support 34 is an adaptive airbag ring, the adaptive airbag ring is connected to the air reservoir 34-2 through the rubber tube 34-1. The air reservoir 34-2 is set on the upper surface of the tongue depressor 33. The side of the air reservoir 34-2 away from the flared mouth 16 has a limiting plate 34-3. The limiting plate 34-3 is fixedly connected to the tongue depressor 33. When the straw 1 is moved into the oral cavity, the large end of the flared mouth 16 opens more and squeezes the air reservoir 34-2. The air reservoir 34-2 inflates into the adaptive airbag ring through the rubber tube 34-1, thereby achieving the function of isolating and protecting the oral mucosa and oropharynx.

[0046] The dimensions of the bite device 4 are 4cm × 1cm × 1cm (length × width × height), and the larger end diameter of the flared mouth 16 is 1.5cm, while the smaller end diameter is 0.7cm.

[0047] The method of using the oral secretion aspirator of the present invention is as follows: First, move the bite device 4 on the straw 1 so that the distance between the flare 16 and the bite device 4 matches the size of the patient's mouth. At the same time, change the opening of the flare 16 in the patient's mouth. After adjustment, put the bite device 4 into the patient's mouth. Then, the inhalation pump 21 is activated, and the secretions in the patient's mouth are drawn from the flare 16 into the collection bottle 18 for collection; at the same time, the first rotating ring 12 is rotated adaptively to prevent the secretions from clogging the straw 1; Finally, after use, remove the bite device 4 from the patient's mouth, turn off the inhalation pump 21, and rotate the handle 17 back and forth to clean the inside of the collection bottle 18. After cleaning, open the normally closed valve to release the wastewater.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oral secretion aspirator, comprising a suction unit (2) and a suction tube (1), wherein the inlet end of the suction unit (2) is connected to the suction tube (1), characterized in that, The straw (1) is provided with a plurality of hemispherical protrusions (3) evenly distributed along its length. The oral secretion aspirator also includes: The bite device (4) is used to be placed in the patient's mouth. The bite device (4) has a perforation (5) which is fitted onto the straw (1). The wall of the perforation (5) abuts against multiple hemispherical protrusions (3). The hemispherical protrusions (3) are deformed by the pressure of the wall of the perforation (5). At the same time, the wall of the perforation (5) has a hemispherical groove (6). By moving the straw (1) on the bite device (4), one of the hemispherical protrusions (3) and the hemispherical groove (6) are aligned. The hemispherical protrusion (3) is repositioned and the hemispherical protrusion (3) and the hemispherical groove (6) are fitted together to restrict the bite device (4) onto the straw (1), thereby changing the length of the straw (1) entering the mouth.

2. The oral secretion aspirator as described in claim 1, characterized in that, The straw (1) has a limiting groove (7) on the outer periphery of the end near the suction unit (2). A slider (8) is slidably arranged in the limiting groove (7). A rotating sleeve (9) is fixedly connected to the slider (8). The rotating sleeve (9) is sleeved on the straw (1). The multiple hemispherical protrusions (3) are evenly distributed on the outer surface of the rotating sleeve (9) along the axial direction of the rotating sleeve (9). Multiple scrapers (11) for scraping off secretions are provided on the outer periphery of the end of the rotating sleeve (9) away from the suction unit (2). The inner wall of the perforation (5) is provided with a first bearing (10). The outer ring of the first bearing (10) is fixedly connected to the inner wall of the perforation (5). The inner wall of the inner ring of the first bearing (10) is provided with the hemispherical groove (6). The inner ring of the first bearing (10) is provided with the rotating sleeve (9). Any hemispherical protrusion (3) on the rotating sleeve (9) can cooperate with the hemispherical groove (6) on the inner ring of the first bearing (10).

3. The oral secretion aspirator as described in claim 2, characterized in that, The rotating sleeve (9) includes: The first rotating ring (12) is fixedly connected to the inner wall of the slider (8). The first rotating ring (12) is rotated and sleeved on the straw (1) through the slider (8). Two connecting rods (13) are arranged parallel to each other, and the same end of the two connecting rods (13) is fixedly connected to the two sides of the first rotating ring (12). Multiple hemispherical protrusions (3) are fixedly arranged on the connecting rods (13) along their own length direction. The second rotating ring (14) is coaxially arranged with the first rotating ring (12), and the second rotating ring (14) is fixedly connected to the other end of the two connecting rods (13). A plurality of scrapers (11) are circumferentially fixed on the end face of the second rotating ring (14) away from the first rotating ring (12).

4. The oral secretion aspirator as described in claim 3, characterized in that, The suction tube (1) is connected to the inlet end of the suction unit (2) through the conduit (15), and the end of the suction tube (1) away from the suction unit (2) is provided with a flared mouth (16). The flared mouth (16) is made of elastic material. Multiple reinforcing ribs (30) are evenly arranged in the side wall of the flared mouth (16) along its generatrix length direction. The flared mouth (16) has a large end and a small end. The small end is rotatably arranged on the outer periphery of the second rotating ring (14) through the second bearing. Multiple rotating rods (31) are evenly arranged on the outer periphery of the large end. One end of each rotating rod (31) is hinged to the outer wall of the large end, and the other end is rotatably connected to the sleeve (32). The sleeve (32) is fixedly connected to the bite device (4).

5. The oral secretion aspirator as described in claim 1, characterized in that, The inner wall of the straw (1) is fixedly provided with a blade (17) for cutting secretions, and the cross-sectional shape of the blade (17) is crisscross.

6. The oral secretion aspirator as described in claim 1, characterized in that, The attraction unit (2) includes: The collection bottle (18) has an exhaust port (19) and an inlet (20) at the top. The inlet (20) is connected to the straw (1). The bottom of the collection bottle (18) is provided with a drain port (22) and a normally closed valve is provided on the drain port (22). An air pump (21) is provided on the exhaust port (19) for discharging air from the collection bottle (18).

7. The oral secretion aspirator as described in claim 6, characterized in that, The bottom of the collection bottle (18) is provided with a liquid outlet pipe (24), the liquid outlet end of the liquid outlet pipe (24) extends into the collection bottle (18), and the liquid inlet end of the liquid outlet pipe (24) is connected to the liquid outlet end of the liquid storage bladder (25). The liquid inlet end of the liquid storage bladder (25) is connected to the cleaning liquid, and the liquid inlet end of the liquid storage bladder (25) is provided with a one-way valve that allows the cleaning liquid to enter the collection bottle (18).

8. The oral secretion aspirator as described in claim 7, characterized in that, The collection bottle (18) is fixedly mounted on the support (26), and the liquid storage bladder (25) is fixedly mounted on the support (26). A handle (27) is rotatably mounted on the support (26). By rotating the handle (27), the handle (27) squeezes the liquid storage bladder (25), thereby squeezing the cleaning fluid in the liquid storage bladder (25) into the collection bottle (18).

9. The oral secretion aspirator as described in claim 8, characterized in that, The handle (27) is rotatably mounted on the bracket (26) at the middle. A sector wheel (23) is fixedly mounted at the end of the handle (27). The sector wheel (23) meshes with a gear (28). The gear (28) is fixed on the outer periphery of the outlet pipe (24). The outlet pipe (24) is rotatably mounted on the bracket (26) via a third bearing. The outlet pipe (24) is rotatably mounted at the bottom of the collection bottle (18) via a sealed bearing. The outlet pipe (24) is vertically mounted. The outlet pipe (24) is connected to the storage bladder (25) via a hose. A stirring blade (29) is fixedly mounted on the outer periphery of the end of the outlet pipe (24) that extends into the collection bottle (18).

10. An oral secretion aspirator as described in claim 4, characterized in that, The bite device (4) is a cuboid structure with a receiving groove on the end face of the cuboid structure. The receiving groove is directly opposite the flared mouth (16). The bite device (4) has a tongue depressor (33). The outer periphery of the large end of the flared mouth (16) has an oropharyngeal support to prevent damage to the oral mucosa and to provide support in the oropharynx.

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