Protective oral cavity airway distraction device

Abstract

The invention discloses a protective oral cavity airway distraction device, and relates to the technical field of oral cavity airways. The whole air delivery pipe is in an arc shape, an air inlet pipe is fixedly arranged at the top of the air delivery pipe, an air bag cushion is fixedly arranged on the outer wall of the air inlet pipe, an air inlet hose is connected to the air bag cushion, the air inlet hose penetrates through the flange, extends to the outside and is fixedly provided with an extrusion ball, and the top of the air inlet pipe is arranged in a mode that the upper portion is narrow and the lower portion is wide. A flange is fixedly arranged on the outer wall of the top of the air inlet pipe; an air receiving pipe is fixedly arranged at the middle end of the top of the flange; the inflatable airbag cushion supports the teeth of the patient after bulging, so that the teeth are prevented from biting the air inlet pipe during coma or resistance, and the risk of airway blockage is reduced; the stretchable binding belt is fixed to the head through the inserting block and the inserting groove, surrounding type fixing is formed, device falling caused by shaking of the head of the patient is prevented, the air duct is autonomously stabilized in the oral cavity of the patient through the synergistic effect of the binding belt and the air bag cushion, continuous pressing by workers is not needed, and the operation complexity is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of oral airways, and specifically to a protective oral airway dilating device. Background Art

[0002] In the case of some patients during an attack, such as stroke, coma, and deeply anesthetized patients, it is easy to block the respiratory tract, resulting in difficulty breathing and low blood oxygen levels. Therefore, breathing will be extremely difficult, and in this case, it is necessary to insert the current oropharyngeal airway to ensure that the patient can maintain a normal arc.

[0003] When using the current oropharyngeal airway, it is necessary to first insert the arc-shaped air delivery tube into the throat, and then externally connect the trachea for delivery through the connecting trachea at the top of the oropharyngeal airway to supply oxygen for the patient's internal respiration. When externally connecting the trachea to the connecting trachea, the connection method uses an insertion sleeve. Firstly, the connection is not very stable, and the sealing at the connection only relies on the frictional extrusion between the pipes, with general effects. At the same time, during the connection, the patient is prone to shaking during the delivery process, resulting in the connection being prone to loosening, affecting the use. At the same time, when the patient uses the oropharyngeal airway, due to discomfort in the mouth, there will be resistance subconsciously, resulting in the patient's head shaking. To prevent the oropharyngeal airway from falling off and shaking, it is necessary for the staff to press it, increasing the complexity of use.

[0004] In view of the above problems, the inventor proposes a protective oral airway dilating device to solve the above problems. Summary of the Invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a protective oral airway dilating device.

[0006] To solve the above technical problems, the present invention adopts the following technical scheme: A protective oral airway dilating device includes an air delivery tube. The overall shape of the air delivery tube is arc-shaped. A gas inlet tube is fixedly provided at the top of the air delivery tube. An airbag pad is fixedly provided on the outer wall of the gas inlet tube. An air inlet hose is connected to the airbag pad. The air inlet hose penetrates through the flange and extends to the outside and is fixedly provided with a squeezing ball. The top of the gas inlet tube is set to be narrower at the top and wider at the bottom. A flange is fixedly provided on the outer wall of the top of the gas inlet tube. A connecting trachea is fixedly provided at the middle end of the top of the flange. The connecting trachea, the middle end of the flange, the gas inlet tube, and the air delivery tube are arranged in a penetrating manner. An installation plate is provided at one end of the gas inlet tube away from the air delivery tube. A connecting component is provided between the installation plate and the flange. Binding components are fixedly provided at both ends of the installation plate.

[0007] Preferably, the binding assembly includes a first groove, the first groove is opened at both ends of the mounting plate, fixed blocks are fixedly provided on both sides of the inner wall of the first groove, a mounting sleeve is provided between the two fixed blocks, and a binding belt is fixedly connected to the middle end of the mounting sleeve. The binding belt can be made of elastic rubber material and can be stretched. A slot is opened at the bottom of one of the binding belts, and an insert block corresponding to the slot is opened at the bottom of the other binding belt.

[0008] Preferably, the connecting assembly includes a mounting block, the mounting block is fixedly arranged on the upper surface of the flange and located at the two ends of the air pipe, two mounting blocks are provided with two symmetrically arranged card grooves on the side facing the air pipe, a mounting groove corresponding to the mounting block is provided on the lower surface of the mounting plate, a second groove is provided inside the mounting plate near the mounting groove, a first wedge block is horizontally slidably arranged inside the second groove, a card block corresponding to the card groove is fixedly arranged on the side of the first wedge block facing the adjacent second groove, and the card block can pass through the second groove and be inserted into the mounting groove A push rod is movably inserted into one side of the mounting plate near the second groove, and a second wedge block is fixedly provided at one end of the push rod located inside the mounting plate, and the inclined surface of the second wedge block abuts against the inclined surface of the first wedge block; a pull plate is fixedly provided at one end of two push rods inserted into the side wall of the mounting plate away from the mounting plate, and magnetic plates that attract each other are respectively provided on the side of the pull plate facing the mounting plate and the side of the mounting plate facing the pull plate; a spring is sleeved on the clamping block between the inner wall of the second groove and the first wedge block, and the two ends of the spring are respectively fixedly provided between the inner wall of the second groove and the first wedge block.

[0009] Preferably, a docking tube is fixedly provided at the middle end of the mounting plate, the middle end of the docking tube is penetrated, and a sealing rubber pad is embedded in the inner wall of the docking tube; a top plate is fixedly provided on the top of the docking tube, and three annular clamping plates are slidably provided on the upper surface of the top plate, and an L-shaped fixing rod is fixedly provided on the back of the clamping plate, and a screw rod is rotatably provided on the upper surface of the top plate, and one end of the fixing rod away from the clamping plate is threadedly inserted on the screw rod, and a driving assembly is provided between the interior of the top plate and the screw rod; the driving assembly includes a gear ring, which is rotatably arranged inside the top plate, and a driving gear is meshed at the teeth of the gear ring, and the driving gear is transmission-connected to the end of the screw rod by two meshing bevel gears; the end of the screw rod close to the bevel gear penetrates the top plate and is fixedly provided with a rotating wheel, and the surface of the rotating wheel is provided with an anti-slip strip.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. After the inflatable airbag cushion bulges, it supports the patient's teeth, preventing the teeth from biting and closing the trachea during coma or resistance, and reducing the risk of airway blockage. The stretchable binding strap is fixed to the head through the insertion block and the slot to form a circumferential fixation, preventing the device from falling off due to the shaking of the patient's head. The synergistic effect of the binding strap and the airbag cushion enables the airway to be autonomously and stably positioned in the patient's oral cavity without the need for continuous pressing by the staff, reducing the operation complexity.

[0012] 2. The clamping plate driven by the lead screw performs three-dimensional fixation on the inserted trachea, avoiding the instability of the traditional socket connection relying only on friction and being able to resist shaking during transportation. The synchronous rotation of the three lead screws realizes uniform clamping, ensuring the rigid connection between the external trachea and the connecting trachea and preventing detachment caused by external forces. The sealing rubber pad can fill the gap between the connecting trachea and the external trachea when they are docked, preventing gas leakage.

[0013] 3. The flange is separated from other structures, so that during subsequent use, other structures can be reused multiple times, avoiding the waste of resources caused by the fixed type being discarded together with the flange being discarded, and at the same time, it can be replaced arbitrarily, increasing the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0015] Figure 1 It is a schematic diagram of the structure of a conventional oropharyngeal airway.

[0016] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 3 For the present invention Figure 2 The enlarged schematic diagram of part A.

[0018] Figure 4 It is a schematic diagram of the bottom view of the mounting plate 5 of the present invention.

[0019] Figure 5 It is a schematic diagram of the internal structure of the mounting plate of the present invention.

[0020] Figure 6 It is a schematic diagram of the structure of the first wedge block and the second wedge block of the present invention.

[0021] Figure 7 It is a schematic diagram of the top plate structure of the present invention.

[0022] Figure 8 For the present invention Figure 7 Schematic enlarged view of the structure at position B in the present invention

[0023] In the figure: 1, gas delivery pipe; 11, intake pipe; 12, flange; 13, connecting gas pipe; 14, airbag pad; 15, intake hose; 16, extrusion ball; 2, first groove; 21, fixing block; 22, mounting sleeve; 23, binding strap; 24, slot; 25, plug; 3, mounting block; 31, clamping groove; 32, mounting groove; 33, second groove; 34, first wedge block; 35, clamping block; 36, push rod; 37, second wedge block; 38, spring; 39, pulling plate; 391, magnetic plate; 4, docking pipe; 41, top plate; 42, clamping plate; 43, fixing rod; 44, lead screw; 45, gear ring; 46, driving gear; 47, bevel gear; 48, runner; 49, sealing rubber pad; 5, mounting plate Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention

[0025] As Figure 1-8 shown, the present invention provides a protective oral airway dilator, including a gas delivery pipe 1. The overall shape of the gas delivery pipe 1 is arc-shaped. The top of the gas delivery pipe 1 is fixedly provided with an intake pipe 11. The outer wall of the intake pipe 11 is fixedly provided with an airbag pad 14. The top of the intake pipe 11 is arranged in a shape that is narrower at the top and wider at the bottom. The outer wall of the top of the intake pipe 11 is fixedly provided with a flange 12. The middle end of the top of the flange 12 is fixedly provided with a connecting gas pipe 13. The connecting gas pipe 13, the middle end of the flange 12, the intake pipe 11 and the gas delivery pipe 1 are penetrated. One end of the intake pipe 11 away from the gas delivery pipe 1 is provided with a mounting plate 5. A connecting component is provided between the mounting plate 5 and the flange 12. Binding components are fixedly provided at both ends of the mounting plate 5

[0026] The binding components include a first groove 2. The first groove 2 is opened at both ends of the mounting plate 5. Both sides of the inner wall of the first groove 2 are fixedly provided with fixing blocks 21. A mounting sleeve 22 is arranged between the two fixing blocks 21. The mounting sleeve 22 can be made of rubber material. The middle end of the mounting sleeve 22 is fixedly connected with a binding strap 23. The provided binding strap 23 can be made of elastic rubber material and can be stretched. The provided binding strap 23 is set to be wide according to the actual needs of patients to better bind the patients and ensure the stability of the binding. A slot 24 is opened at the bottom of one of the binding straps 23, and a plug 25 corresponding to the slot 24 is opened at the bottom of the other binding strap 23

[0027] By adopting the above technical solution, two tie straps 23 are extended to the back of the patient's brain. The tie straps 23 can be stretched, and then the insertion block 25 is inserted into the slot 24. At this time, the two tie straps 23 will completely fix the oral airway to the patient's brain, and will not be detached due to the patient's resistance, ensuring that the oral airway is stably arranged on the patient.

[0028] The connecting component includes a mounting block 3. The mounting block 3 is fixedly arranged on the upper surface of the flange 12 and located at both ends of the tracheal connecting tube 13. Two symmetrically arranged card slots 31 are formed on one side of the two mounting blocks 3 facing the tracheal connecting tube 13. An installation groove 32 corresponding to the mounting block 3 is formed on the lower surface of the mounting plate 5. A second groove 33 is formed inside the mounting plate 5 near the installation groove 32. A first wedge block 34 is horizontally slidably arranged inside the second groove 33. A clamping block 35 corresponding to the card slot 31 is fixedly arranged on one side of the first wedge block 34 facing the adjacent second groove 33. The clamping block 35 can penetrate the second groove 33 and be inserted into the installation groove 32. A push rod 36 is movably inserted near the second groove 33 on one side of the mounting plate 5. A second wedge block 37 is fixedly arranged at one end of the push rod 36 located inside the mounting plate 5. The inclined surface of the second wedge block 37 abuts against the inclined surface of the first wedge block 34.

[0029] By adopting the above technical solution, when the first wedge block 34 is pushed by the second wedge block 37, the first wedge block 34 will be pushed so that the clamping block 35 will move into the installation groove 32. Therefore, when the mounting plate 5 is installed on the flange 12, only the docking tube 4 on the mounting plate 5 needs to be sleeved on the tracheal connecting tube 13. At this time, the bottom of the mounting plate 5 is in close contact with the flange 12. At this time, the mounting block 3 on the flange 12 will be inserted into the installation groove 32 formed on the mounting plate 5. Therefore, the clamping block 35 will be inserted into the card slot 31 formed on the mounting block 3, thereby completing the tight installation between the flange 12 and the mounting plate 5, quickly completing the installation between the two, making the flange 12 and other structures separated. Thus, in subsequent use, other structures can be reused multiple times, avoiding being discarded together with the discarded flange 12, resulting in waste of resources. At the same time, it can be replaced at will, increasing the practicability of the device.

[0030] Two push rods 36 inserted into the side wall of the mounting plate 5 are commonly fixed with a pull plate 39 at the ends far from the mounting plate 5. Magnet plates 391 that attract each other are respectively arranged on one side of the pull plate 39 facing the mounting plate 5 and on one side of the mounting plate 5 facing the pull plate 39.

[0031] By adopting the above technical solution, the set pull plate 39 can facilitate the staff to directly control the two push rods 36 to work together at the same time, thereby improving the convenience of operation. The set magnetic plates 391 attract each other, so that after the pull plate 39 pushes the pull rod to make the second wedge block 37 squeeze the first wedge block 34 to move, the position of the first wedge block 34 is guaranteed to be fixed, preventing the first wedge block 34 from shifting, causing the insert block 25 to detach from the slot 24.

[0032] A spring 38 is sleeved on the clamping block 35 between the inner wall of the second groove 33 and the first wedge block 34 , and two ends of the spring 38 are respectively fixedly disposed between the inner wall of the second groove 33 and the first wedge block 34 .

[0033] By adopting the above technical solution, the spring 38 is provided to push the first wedge block 34 to reset, so that the clamping block 35 can be disengaged from the clamping slot 31, canceling the fixation of the mounting block 3, thereby conveniently and quickly completing the disassembly between the mounting plate 5 and the flange 12.

[0034] A butt-joint pipe 4 is fixedly provided at the middle end of the mounting plate 5 . The middle end of the butt-joint pipe 4 is penetrated, and a sealing rubber pad 49 is embedded at the inner wall of the butt-joint pipe 4 .

[0035] By adopting the above technical solution, the provided sealing rubber pad 49 can fill the gap between the air pipe 13 and the external air pipe when they are connected to each other, thereby preventing gas leakage.

[0036] A top plate 41 is fixedly provided on the top of the butt-jointed tube 4, and three annular clamping plates 42 are slidably provided on the upper surface of the top plate 41, and an L-shaped fixing rod 43 is fixedly provided on the back of the clamping plate 42. A screw rod 44 is rotatably provided on the upper surface of the top plate 41, and one end of the fixing rod 43 away from the clamping plate 42 is threadedly inserted on the screw rod 44, and a driving assembly is provided between the interior of the top plate 41 and the screw rod 44.

[0037] By adopting the above technical solution, when the fixing rod 43 is driven to move by driving the screw rod 44, the clamping plate 42 will be pushed to move toward the middle end of the positioning plate. The three clamping plates 42 distributed in a ring will clamp the air pipe inserted into the docking tube 4 at the same time. The mechanical structure clamps to ensure the stability of the docking between the external air pipe and the air connecting pipe 13 to avoid arbitrary separation due to external force. At the same time, when the air pipe is inserted into the docking tube 4, the friction between the inner walls will also increase the connection stability between the pipes.

[0038] A driving gear 46 is meshed with the teeth of the gear ring 45 , and the driving gear 46 is transmission-connected with the end of the lead screw 44 via two meshed bevel gears 47 .

[0039] By adopting the above technical solution, when one of the lead screws 44 rotates, the driving gear 46 is driven to rotate by two meshed bevel gears 47. At this time, the driving gear 46 drives the toothed ring 45 to rotate. At this time, the other two driving gears 46 meshed with the toothed ring 45 will rotate together. At this time, the driving gear 46 cooperates with the adjacent bevel gear 47 to drive the other lead screws 44 to rotate, so as to achieve the purpose of simultaneously rotating the three lead screws 44 to drive the clamping plate 42 to clamp the trachea inserted into the docking pipe 4.

[0040] One end of the lead screw 44 close to the bevel gear 47 penetrates through the top plate 41 and is fixedly provided with a runner 48, and anti-slip strips are arranged on the surface of the runner 48.

[0041] By adopting the above technical solution, the provided runner 48 can facilitate the staff to directly drive the lead screw 44 to rotate, so as to control the stable clamping of the trachea to be connected by the annularly distributed clamping plates 42 at one time and prevent the phenomenon of detachment.

[0042] An air inlet hose 15 is connected to the airbag pad 14. The air inlet hose 15 penetrates through the flange 12 and extends to the outside and is fixedly provided with a squeezing ball 16.

[0043] By adopting the above technical solution, the outer wall of the airbag pad 14 is inflated through the air inlet hose 15, so that the outer wall of the airbag pad 14 bulges to support the teeth part of the patient, and to prevent the patient from biting into the trachea 11 when unconscious or in a resistant state, which affects the air intake effect.

[0044] Working principle: When in use, the staff can first insert the air delivery pipe 1 arranged in an arc shape on the oral airway into the throat of the patient. At this time, the staff is located at the position of the air inlet pipe 11 and will be at the patient's teeth. Subsequently, the staff can directly continuously press the squeezing ball 16, and the outer wall of the airbag pad 14 is inflated through the air inlet hose 15, so that the outer wall of the airbag pad 14 bulges to support the teeth part of the patient, and to prevent the patient from biting into the trachea 11 when unconscious or in a resistant state, which affects the air intake effect;

[0045] Subsequently, the staff can stretch the two binding straps 23 behind the patient's head. The binding straps 23 can be stretched, and then the insertion block 25 is inserted into the slot 24. At this time, the two binding straps 23 will firmly fix the oral airway to the patient's brain and will not be detached due to the patient's resistance, ensuring that the oral airway is stably set on the patient;

[0046] Subsequently, the end of the required externally connected oxygen tube can be inserted into the docking tube 4. At this time, the gas connection tube 13 and the oxygen tube located in the docking tube 4 are at the position of the sealing rubber pad 49 provided in the docking tube 4. When the sealing rubber pad 49 docks the gas connection tube 13 and the externally connected trachea, it can fill the gap between the two to prevent gas leakage. By driving the rotating wheel 48 to drive one of the lead screws 44 to rotate, the lead screw 44 at this time will drive the fixed rod 43 to approach the oxygen tube. When one of the lead screws 44 rotates, the driving gear 46 is driven to rotate by two meshing bevel gears 47. At this time, the driving gear 46 drives the toothed ring 45 to rotate. At this time, the other two driving gears 46 meshing with the toothed ring 45 will rotate together. At this time, the driving gear 46 cooperates with the adjacent bevel gear 47 to drive the other lead screw 44 to rotate, so as to achieve the purpose of simultaneously rotating the three lead screws 44 to drive the clamping plate 42 to clamp the trachea inserted into the docking tube 4. Through mechanical structure clamping, the stability of the connection between the externally connected trachea and the gas connection tube 13 is ensured, avoiding being randomly detached by external force. At the same time, when the trachea is inserted into the docking tube 4, the friction between the inner walls will also increase the connection stability between the pipes.

[0047] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. A protective oral airway opening device, comprising an air delivery tube (1), characterized in that: The air supply pipe (1) is arranged in an arc shape as a whole. An air intake pipe (11) is fixedly arranged at the top of the air supply pipe (1). An airbag cushion (14) is fixedly arranged on the outer wall of the air intake pipe (11). The top of the air intake pipe (11) is arranged in a narrow upper part and wide lower part. A flange (12) is fixedly arranged on the outer wall of the top of the air intake pipe (11). An air connection pipe (13) is fixedly arranged at the middle end of the top of the flange (12). The air connection pipe (13), the middle end of the flange (12), the air intake pipe (11) and the air supply pipe (1) are arranged through each other. A mounting plate (5) is arranged at one end of the air intake pipe (11) away from the air supply pipe (1). A connecting component is arranged between the mounting plate (5) and the flange (12). Binding components are fixedly arranged at both ends of the mounting plate (5).

2. A protective oral airway expansion device as claimed in claim 1, characterized in that: The binding assembly comprises a first groove (2), wherein the first groove (2) is provided at both ends of the mounting plate (5), and fixing blocks (21) are fixedly provided on both sides of the inner wall of the first groove (2), and a mounting sleeve (22) is provided between the two fixing blocks (21), and a binding belt (23) is fixedly connected to the middle end of the mounting sleeve (22), and the provided binding belt (23) can be made of elastic rubber material and can be stretched, and a slot (24) is provided at the bottom of one of the binding belts (23), and an insert block (25) corresponding to the slot (24) is provided at the bottom of the other binding belt (23).

3. A protective oral airway expansion device as claimed in claim 1, characterized in that: The connection assembly comprises a mounting block (3), the mounting block (3) being fixedly arranged on the upper surface of the flange (12) and located at the two ends of the air connection pipe (13), two symmetrically arranged card slots (31) being provided on the side of the two mounting blocks (3) facing the air connection pipe (13), a mounting slot (32) corresponding to the mounting block (3) being provided on the lower surface of the mounting plate (5), a second groove (33) being provided inside the mounting plate (5) near the mounting groove (32), a first wedge block being provided in a horizontally sliding manner inside the second groove (33) (34), a clamping block (35) corresponding to the clamping groove (31) is fixedly provided on the side of the first wedge block (34) facing the adjacent second groove (33), and the clamping block (35) can penetrate the second groove (33) and be inserted into the mounting groove (32), and a push rod (36) is movably inserted into one side of the mounting plate (5) near the second groove (33), and a second wedge block (37) is fixedly provided at one end of the push rod (36) located inside the mounting plate (5), and the inclined surface of the second wedge block (37) is against the inclined surface of the first wedge block (34).

4. A protective oral airway expansion device as claimed in claim 3, characterized in that: A pull plate (39) is fixedly disposed at one end of two push rods (36) inserted into the side wall of the mounting plate (5) away from the mounting plate (5), and a side of the pull plate (39) facing the mounting plate (5) and a side of the mounting plate (5) facing the pull plate (39) are respectively provided with magnetic plates (391) that attract each other.

5. A protective oral airway expansion device as claimed in claim 4, characterized in that: A spring (38) is sleeved on the clamping block (35) between the inner wall of the second groove (33) and the first wedge block (34), and two ends of the spring (38) are respectively fixedly arranged between the inner wall of the second groove (33) and the first wedge block (34).

6. A protective oral airway expansion device as claimed in claim 4, characterized in that: A butt joint pipe (4) is fixedly provided at the middle end of the mounting plate (5), the middle end of the butt joint pipe (4) is penetrated, and a sealing rubber pad (49) is embedded at the inner wall of the butt joint pipe (4).

7. A protective oral airway expansion device as claimed in claim 6, characterized in that: A top plate (41) is fixedly provided on the top of the butt-jointed tube (4), three annular clamping plates (42) are slidably provided on the upper surface of the top plate (41), a fixing rod (43) in an L-shape is fixedly provided on the back of the clamping plate (42), a screw rod (44) is rotatably provided on the upper surface of the top plate (41), one end of the fixing rod (43) away from the clamping plate (42) is threadedly inserted on the screw rod (44), and a driving assembly is provided inside the top plate (41) and between the screw rod (44).

8. A protective oral airway expansion device as claimed in claim 7, characterized in that: The driving assembly comprises a gear ring (45) which is rotatably arranged inside the top plate (41); a driving gear (46) is meshed at the teeth of the gear ring (45); and the driving gear (46) is transmission-connected to the end of the lead screw (44) via two meshing bevel gears (47).

9. A protective oral airway expansion device as claimed in claim 8, characterized in that: One end of the screw rod (44) close to the bevel gear (47) passes through the top plate (41) and is fixedly provided with a rotating wheel (48), and a non-slip strip is provided on the surface of the rotating wheel (48).

10. The protective oral airway expansion device according to claim 1, characterized in that: An air intake hose (15) is connected to the airbag cushion (14), and the air intake hose (15) penetrates the flange (12) and extends to the outside and is fixed with a squeezing ball (16).

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