Ear-nose-throat medicine sprayer convenient for controlling dosage

Abstract

The utility model discloses an otolaryngological medicine sprayer convenient for controlling medicine dosage. Comprising a quantifying assembly used for quantifying medicine, a needle cylinder assembly used for containing the medicine, a piston push rod used for pushing out the medicine, a fixing plate assembly used for connecting an administration assembly and an air bag assembly, the administration assembly used for guiding the medicine and the air bag assembly used for blocking redundant liquid medicine. The quantitative assembly is located at one end of the needle cylinder assembly and connected to the needle cylinder assembly in a clamped mode, the piston push rod is arranged in the needle cylinder assembly, penetrates through the quantitative assembly and is slidably connected to the interior of the needle cylinder assembly, and the fixing plate assembly is arranged at the other end of the needle cylinder assembly and is in threaded connection to the needle cylinder assembly. The medicine feeding assembly is transversely connected to the fixing plate, the air bag assembly is located on one side of the medicine feeding assembly, the air bag assembly is connected with the medicine feeding assembly, redundant medicine liquid can be prevented from flowing into the nasal cavity, the ear canal or the throat of a patient through the air bag assembly, and therefore the situation that the patient feels uncomfortable due to the redundant medicine liquid is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an ENT sprayer which is convenient for controlling the amount of medicine. Background Art

[0002] Currently, when treating ear canal diseases in patients clinically, it is often necessary to drip medicine into the ear canal. Existing ear canal medicine bottles (or medicine bottles) are usually provided with a dripping port at the bottle mouth. Squeezing the medicine bottle can squeeze out the medicine in the bottle and drip it out from the dripping port into the ear canal.

[0003] Chinese patent publication No. CN217311586U discloses an otolaryngology medication device, comprising a syringe, a cannula is provided at the front end of the syringe, the outer surface of the cannula is provided with a scale line, the outer wall of the cannula is sleeved with a fixed quantitative component, and the fixed quantitative component comprises an outer sleeve plate, a slide groove, a screw, a slider, a fixed clamping block, and a rubber nasal plug ring, the outer wall of the cannula is sleeved with an outer sleeve plate, the back side of the outer sleeve plate is symmetrically provided with a slide groove, the interior of the slide groove is provided with a screw, the outer wall of the screw is sleeved with a slider, the back side of the slider is provided with a fixed clamping block, the front side of the outer sleeve plate is provided with a rubber nasal plug ring, a valve is provided on the upper side of the syringe, a dosing barrel is provided on the upper side of the valve, a dosing port is provided on the upper side of the dosing barrel, a piston push rod is provided inside the syringe, and a handle is provided at the bottom of the syringe.

[0004] However, the above device is not convenient for controlling the amount of medicine sprayed each time during actual use. Due to the limited space in the patient's ear canal, nasal cavity or throat, it is easy to cause too much or too little medicine to be sprayed. Too little medicine will not achieve the therapeutic effect, and too much medicine will easily cause excess medicine to flow into the patient's ear canal, nasal cavity or deep throat, which may cause discomfort to the patient's affected area. In addition, when the spray head is placed in the patient's ear canal, nasal cavity or throat, the drug guide tube and the spray device body may easily block the affected area, which is not conducive to the medical staff's spraying treatment. Utility Model Content

[0005] The present invention aims to overcome the shortcomings of the prior art mentioned above, which exist in that due to the limited space in the patient's ear canal, nasal cavity or throat, it is easy to cause too much or too little medicine to be sprayed. Too little may not achieve the therapeutic effect, and too much may easily cause excess medicine to flow into the patient's ear canal, nasal cavity or deep throat, which may cause discomfort to the patient's affected area. When the spray head is placed in the patient's ear canal, nasal cavity or throat, the drug guide tube and the spray device body may easily block the affected area, which is not conducive to the medical staff's spraying treatment.

[0006] An ENT sprayer that is convenient for controlling the amount of medicine is proposed, which includes a quantitative component for quantitatively measuring the medicine, a syringe component for containing the medicine, a piston push rod for pushing out the medicine, a fixed plate component for connecting the dosing component and the air bag component, a dosing component for guiding the medicine and an air bag component for blocking excess liquid medicine. The quantitative component is located at one end of the syringe component and is clamped on the syringe component, the piston push rod is arranged inside the syringe component, and the piston push rod passes through the quantitative component and is slidably connected to the inside of the syringe component, the fixed plate component is arranged at the other end of the syringe component and is threadedly connected to the syringe component, the dosing component is horizontally connected to the fixed plate, and the air bag component is located at the dosing component. Components side of the device, and the airbag component is connected to the drug delivery component.

[0007] In the technical solution of the present invention, before administering the medicine to the patient's ear canal, nasal cavity or throat through the syringe assembly and the piston push rod, the interior of the airbag assembly will be inflated through the fixing plate assembly and the syringe assembly, so that the airbag in the airbag assembly is expanded by the air, and the expanded airbag will use its own reminder to block the patient's ear canal, nasal cavity or throat. Subsequently, when the drug administration assembly is used to spray the medicine liquid to the patient's lesion, excess medicine will be blocked by the expanded airbag, avoiding the excess medicine liquid from continuing to flow into the patient's ear canal, nasal cavity or throat deep, thereby avoiding causing discomfort to the patient, and after the medicine liquid flows to the end part of the catheter, it will pass through the through hole of the end part of the catheter and evenly spray the medicine liquid to the surrounding area, thereby avoiding the problem that the catheter can only spray one place at a time, and the catheter connection It is located at the center of the airbag, so after the airbag is inflated and deformed, the position of the catheter will be raised to avoid direct contact between the catheter and the patient's lesion, and the liquid medicine will be evenly sprayed around through the through hole of the patient's end part after flowing to the end part of the catheter, thereby avoiding the catheter from blocking the affected part, which is used to solve the problem mentioned in the technical background that due to the limited space in the patient's ear canal, nasal cavity or throat, it is easy to cause too much or too little medicine to be sprayed, too little can not achieve the treatment effect, and too much can easily cause excess liquid medicine to flow into the patient's ear canal, nasal cavity or deep throat, which can easily cause discomfort to the patient's affected part and when the spray head is placed in the patient's ear canal, nasal cavity or throat, the drug guide tube and the spray device body can easily block the affected part, which is not conducive to the spraying treatment of medical staff.

[0008] In the preferred embodiment of the technical solution of the present invention, the quantitative assembly includes a sealing cover and a baffle, the sealing cover is horizontally arranged at one end of the syringe assembly, and the sealing cover is clamped on the syringe assembly, the baffle is horizontally arranged inside the syringe assembly, and the baffle is threadedly connected to the piston push rod, the sealing cover is clamped on the injection barrel, and the inner wall of the sealing cover is provided with multiple protrusions, and the baffle is provided with multiple recesses, and the baffle is threadedly connected to the piston push rod. Therefore, when the position of the baffle on the piston push rod needs to be adjusted, it is only necessary to clamp the baffle on the sealing cover and then rotate the piston push rod to adjust the volume of the syringe that can be used to hold the medicine.

[0009] The preferred technical solution of the present invention is that the syringe assembly includes a syringe, a medicine inlet tube and a first one-way valve. The medicine inlet tube is horizontally arranged at one end of the syringe and connected to the syringe. The first one-way valve is horizontally arranged at the medicine inlet tube, and the first one-way valve is plugged into the medicine inlet tube. When it is necessary to add medicine to the inside of the syringe, the medicine liquid can be injected into the interior of the syringe through the medicine inlet tube and the first one-way valve. During this process, the medicine is always in a sealed state and will not come into contact with the outside air. Therefore, when the medicine is injected into the syringe, oxidation will not occur.

[0010] In the preferred embodiment of the technical solution of the present invention, the syringe is provided with scale lines, and the syringe is made of transparent plastic. Therefore, the piston push rod rotates after the baffle is stuck to adjust the volume of the syringe that can be used to hold the medicine. Medical staff can observe the position of the sealing plug after being moved by the piston push rod through the scale lines on the syringe to ensure that the medicine injected into the syringe will not be excessive.

[0011] Preferably, the technical solution of the present invention is that the fixed plate assembly includes a fixed plate, a first connection port and a second connection port. The first connection port is horizontally arranged at one end of the fixed plate and connected to the fixed plate, and the drug delivery assembly is connected to the first connection port. The second connection port is located on one side of the first connection port, and the second connection port is also connected to the fixed plate. The airbag assembly is connected to the second connection port. The first connection port and the second connection port are both provided with threads inside. Therefore, when necessary, the fixed plate can be fixed to the syringe by threaded connection. The threaded connection is simple, fast and has good self-locking performance. At the same time, no leakage will occur when the syringe injects the medicine into the catheter.

[0012] Preferably, the drug delivery component includes a second one-way valve, a catheter and a threaded interface. One end of the second one-way valve is threadedly connected to the first connection port, the catheter is plugged into the other end of the second one-way valve, the threaded interface is located at the other end of the catheter and is plugged into the catheter, the airbag assembly is threadedly connected to the threaded interface, and multiple groups of through holes are provided at the end of the catheter. Therefore, the drug liquid flowing to the through holes of the catheter will be evenly sprayed around under the push of the syringe, thereby increasing the disposable spraying area of ​​the catheter.

[0013] The preferred technical solution of the present invention is that the airbag assembly includes an air release valve, an air guide tube, an airbag and a sealing plate. The airbag is threadedly connected to the threaded interface, the sealing plate is located inside the airbag and connected to the air inlet of the airbag, the air guide tube is located inside the catheter and one end of the air guide tube is plugged into the sealing plate, and the other end of the air guide tube is plugged into the air release valve. The air release valve is located at the second connection port and connected to the second connection port. When the medicine flows to the patient's affected area through the catheter, excess medicine will be blocked by the airbag to prevent the medicine from continuing to flow into the patient's ear canal, nasal cavity or deep throat due to gravity and causing discomfort to the patient.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Before spraying the medicine on the patient's lesion, the utility model will first block the patient's ear canal, nasal cavity or throat through the expanded and deformed air bag, so as to prevent the excess medicine from continuing to flow into the patient's ear canal, nasal cavity or throat after being sprayed on the patient's lesion, causing discomfort to the patient. At the same time, because the catheter is connected to the center of the air bag, the position of the catheter will be raised after the air bag is expanded and deformed, so as to prevent the catheter from directly contacting the patient's lesion. After the medicine flows to the end part of the catheter, it will be sprayed evenly to the surroundings through the through hole of the patient's end part, so as to prevent the catheter from blocking the affected area. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the three-dimensional structure of an ENT sprayer that is convenient for controlling the dosage of medicine;

[0017] Figure 2 A schematic diagram of the internal structure of the syringe assembly of an ENT sprayer that facilitates drug dosage control (the syringe is a whole, with a section removed to show the internal structure);

[0018] Figure 3 A schematic diagram of the structure of a quantitative component of an ENT sprayer that facilitates drug dosage control;

[0019] Figure 4 A schematic diagram of the fixed plate assembly structure of an ENT sprayer that facilitates drug dosage control (the catheter is a whole, with a section removed to reveal the internal structure).

[0020] Figure 5 A schematic diagram of the coordination of the drug delivery component and the airbag component of an ENT sprayer for easy drug dosage control (the catheter is shown as a whole, with a section removed to show the internal structure);

[0021] Figure 6 A schematic diagram of the internal structure of the air bag of an ENT sprayer that facilitates drug dosage control (the air bag is a whole, with a section removed to show the internal structure);

[0022] In the figure: 1-quantitative assembly, 11-sealing cover plate, 12-baffle, 2-syringe assembly, 21-syringe, 22-medicine inlet tube, 23-first one-way valve, 3-piston push rod, 31-sealing plug, 4-fixed plate assembly, 41-fixed plate, 42-first connecting port, 43-second connecting port, 5-dosing assembly, 51-second one-way valve, 52-catheter, 53-threaded interface, 6-airbag assembly, 61-deflation valve, 62-air guide tube, 63-airbag, 64-sealing plate. DETAILED DESCRIPTION

[0023] The following is a combination of the appended examples of the present invention Figure 1-6 , the technical solutions in the embodiments of the present utility model are described in detail.

[0024] like Figure 1 As shown, an ENT sprayer that is easy to control the amount of medicine includes a dosing component 1 for dosing the medicine, a syringe component 2 for holding the medicine, a piston push rod 3 for pushing out the medicine, a fixing plate 41 component 4 for connecting the dosing component 5 and the air bag component 6, the dosing component 5 for guiding the medicine and the air bag component 6 for blocking excess liquid medicine. The dosing component 1 is located at one end of the syringe component 2, and the dosing component 1 is laterally clamped on the syringe component 2. The piston push rod 3 is set at the axial position inside the syringe component 2 according to the length direction of the syringe component 2, and the piston push rod 3 passes through the center position of the dosing component 1 and is slidably connected to the inside of the syringe component 2.

[0025] like Figure 1 As shown, the fixed plate 41 component 4 is located at the other end of the syringe component 2, and the fixed plate 41 component 4 is threadedly connected to the syringe component 2. The liquid medicine entering the syringe component 2 will pass through the interior of the fixed plate 41 component 4 under the action of the piston push rod 3 and then enter the interior of the medication component 5. The medication component 5 is located at the other end of the fixed plate 41 component 4, and the medication component 5 is also threadedly connected to the fixed plate 41 component 4. The airbag component 6 is located on one side of the medication component 5 and is plugged into the fixed plate 41 component 4, and the airbag component 6 is connected to the medication component 5. Therefore, when the airbag 63 needs to work, the airbag component 6 can be inflated through the syringe component 2.

[0026] like Figure 2As shown, the syringe assembly 2 includes a syringe 21, a drug inlet tube 22 and a first one-way valve 23. The drug inlet tube 22 is horizontally arranged at one end of the syringe 21 and close to the fixed plate 41 assembly 4, and one end of the drug inlet tube 22 is bonded to the syringe 21. Therefore, the medicine entering the inside of the drug inlet tube 22 will enter the inside of the syringe 21 through the drug inlet tube 22. The other end of the drug inlet tube 22 is connected with the first one-way valve 23. Therefore, when injecting medicine into the syringe 21, the medicine will first enter the inside of the first one-way valve 23, and then enter the inside of the drug inlet tube 22 and the syringe 21 through the first one-way valve 23. When injecting medicine into the syringe 21, it is only necessary to connect the medicine delivery tube to the first one-way valve 23, and then deliver the medicine into the syringe 21.

[0027] like Figure 2 As shown, when the medicine is delivered into the syringe 21, the valve inside the first one-way valve 23 will open, and then the medicine liquid inside the medicine delivery tube 22 will flow into the first one-way valve 23 and the inside of the medicine inlet tube 22. After the medicine delivery is completed, the medicine delivery tube 22 can be unplugged from the first one-way valve 23. At this time, the valve inside the first one-way valve 23 will also be closed as the medicine delivery is completed. Therefore, when the piston push rod 3 is pushed in time to squeeze the medicine liquid inside the syringe 21 into the drug delivery component 5, the medicine liquid inside the syringe 21 will not leak out through the first one-way valve 23. There are scale lines printed on the outer wall of the syringe 21. Therefore, when the piston push rod 3 moves up and down, the scale lines on the wall of the syringe 21 can be used as a reference to avoid too much or too little medicine liquid entering the syringe 21.

[0028] like Figure 3 As shown, the quantitative assembly 1 includes a sealing cover plate 11 and a baffle plate 12. The sealing cover plate 11 is vertically arranged at one end of the syringe 21 of the syringe assembly 2, and the sealing cover plate 11 is clamped on the syringe 21 by friction. A through hole is opened at the center of the sealing cover plate 11, and the piston push rod 3 is arranged inside the syringe 21 through the through hole at the center of the sealing cover plate 11. The baffle plate 12 is horizontally arranged inside the syringe 21 and the baffle plate 12 is threadedly connected to the piston push rod 3. Therefore, when the piston push rod 3 slides inside the syringe 21, the baffle plate 12 will move up and down with the piston push rod 3. A plurality of protrusions are provided on the inner wall of the sealing cover plate 11, and a plurality of grooves are provided on the baffle plate 12 at positions corresponding to the protrusions.

[0029] like Figure 3As shown, when the piston push rod 3 rotates, the protrusion on the sealing cover plate 11 can be inserted into the groove on the baffle 12 to prevent the baffle 12 from rotating with the piston push rod 3 when the piston push rod 3 rotates. At the same time, when the piston push rod 3 is pulled upward, after the baffle 12 presses against the sealing cover plate 11, the piston push rod 3 can no longer be pulled upward. Therefore, after the medical staff quantifies the volume of the medicine that can be held in the syringe 21 through the baffle 12, there is no need to observe the scale line when withdrawing the medicine. They only need to pull the piston push rod 3 upward until the baffle 12 conflicts with the sealing cover plate 11 and the piston push rod 3 can no longer be pulled upward. In this way, the medicine inside the syringe 21 is quantified to avoid too much or too little liquid medicine entering the syringe 21.

[0030] like Figure 2-3 As shown, a sealing plug 31 is connected to the end of the piston push rod 3, and the sealing plug 31 is bonded to the piston push rod 3. Therefore, when the piston push rod 3 moves up and down, the piston push rod 3 will drive the sealing plug 31 to move synchronously. Therefore, when the piston push rod 3 is manually pressed, the piston push rod 3 will squeeze out the liquid medicine inside the syringe 21 through the sealing plug 31. Therefore, when it is necessary to adjust the capacity of the syringe 21 that can be used to hold medicine, the piston push rod 3 can be pulled out upward until the protrusion on the sealing cover plate 11 is inserted into the groove on the baffle 12, and then the piston push rod 3 can be rotated forward. When the piston push rod 3 rotates forward, the end of the piston push rod 3 will begin to gradually move toward the other end of the syringe 21, and the sealing plug 31 will also gradually approach the first one-way valve 23 under the push of the piston push rod 3.

[0031] like Figure 2-3 As shown, the capacity of the syringe 21 that can be used to hold medicines will become smaller and smaller at this time. On the contrary, when the protrusion on the sealing cover plate 11 is inserted into the groove on the baffle 12 and the piston push rod 3 begins to rotate in the opposite direction, the end of the piston push rod 3 will begin to gradually move away from the other end of the syringe 21, and the sealing plug 31 will also gradually move away from the first one-way valve 23 under the drive of the piston push rod 3. At this time, the capacity of the syringe 21 that can be used to hold medicines will also become larger and larger. When the sealing plug 31 moves up and down with the piston push rod 3, it can be compared with the scale lines on the wall of the syringe 21. After the sealing plug 31 moves to the required scale, the forward or reverse rotation of the piston push rod 3 can be stopped.

[0032] like Figure 4-6As shown, the fixing plate 41 assembly 4 includes a fixing plate 41, a first connecting port 42 and a second connecting port 43. The first connecting port 42 is horizontally arranged at one end of the fixing plate 41 and bonded to the fixing plate 41, and an internal thread is provided on the inner wall of the first connecting port 42. Therefore, when necessary, the internal thread on the first connecting port 42 can be engaged with the external thread on the injection barrel 21, and the fixing plate 41 assembly 4 and the injection barrel 21 are connected together by a threaded connection. The threaded connection has a simple structure and reliable performance. Therefore, when the medicine inside the injection barrel 21 is squeezed into the first connecting port 42, no leakage will occur, and the drug delivery assembly 5 is connected to the first connecting port 42.

[0033] like Figure 4-6 As shown, the medicine entering the first connection port 42 will flow into the interior of the drug delivery component 5. The second connection port 43 is located on one side of the first connection port 42, and the second connection port 43 is also bonded to the fixed plate 41. The inner wall of the second connection port 43 is also provided with an internal thread. Therefore, when necessary, the second connection port 43 can also be connected to the syringe 21 by a threaded connection. The airbag assembly 6 is plugged into the second connection port 43. Therefore, when the airbag assembly 6 is needed to work, the syringe 21 can be threadedly connected to the second connection port 43, and then the airbag assembly 6 can be inflated through the syringe 21.

[0034] like Figure 4-6 As shown, the drug delivery component 5 includes a second one-way valve 51, a catheter 52 and a threaded interface 53. One end of the first connecting port 42 is connected to the syringe 21, and the second one-way valve 51 is threadedly connected to the other end of the first connecting port 42. When the piston push rod 3 is pulled upward to draw the medicine into the interior of the syringe 21, the valve inside the second one-way valve 51 will be closed to avoid air leakage and the medicine cannot enter the syringe 21 from the interior of the first one-way valve 23. When the piston push rod 3 moves downward and opens to squeeze the medicine inside the syringe 21, the valve inside the second one-way valve 51 will open, and the valve inside the first one-way valve 23 will close. At this time, the medicine will enter the interior of the second one-way valve 51 through the first connecting port 42.

[0035] like Figure 4-6 As shown, one end of the catheter 52 is plugged into the second one-way valve 51, so the medicine entering the second one-way valve 51 will flow into the interior of the catheter 52, and the other end of the catheter 52 is plugged into the threaded interface 53, the airbag assembly 6 is threadedly connected to the threaded interface 53, and the catheter 52 is located on one end of the threaded interface 53. A plurality of through holes are evenly opened, so when the medicine flows to the other end of the catheter 52, it will be blocked by the airbag assembly 6, and after accumulating at the threaded interface 53, it will be evenly sprayed to the surroundings through the multiple through holes on the catheter 52.

[0036] like Figure 4-6As shown, the airbag assembly 6 includes a deflation valve 61, an air guide tube 62, an airbag 63 and a sealing plate 64. The airbag 63 is threadedly connected to the threaded interface 53. The sealing plate 64 is horizontally arranged inside the airbag 63 and the sealing plate 64 is bonded to the air inlet of the airbag 63. One end of the second connecting port 43 is connected to the syringe 21, and the deflation valve 61 is plugged into the other end of the second connecting port 43. The air guide tube 62 is located inside the catheter 52, and one end of the air guide tube 62 is plugged into the sealing plate 64, and the other end of the air guide tube 62 is plugged into the deflation valve 61. Therefore, when it is necessary to inflate the interior of the airbag 63, it is only necessary to connect the syringe 21 to the second connecting port 43 and then push the piston push rod 3.

[0037] like Figure 4-6 As shown, the piston push rod 3 can squeeze the air inside the syringe 21 into the interior of the second connecting port 43. When the air enters the interior of the second connecting port 43, it will pass through the second connecting port 43 and the air release valve 61 and be guided by the air guide tube 62 before entering the interior of the airbag 63. When the syringe 21 injects air into the interior of the airbag 63, the air release valve 61 will open. At this time, the air can enter the interior of the air guide tube 62 and the airbag 63 through the air release valve 61. After the airbag 63 is expanded and deformed by the air, the air release valve 61 can be closed and the inflation of the airbag 63 through the syringe 21 can be stopped. After the spraying of the medicine is completed, the air release valve 61 can be opened to discharge the air inside the airbag 63, and then the airbag 63 can be taken out through the catheter 52.

[0038] The movement process of this embodiment is as follows: when the airbag 63 has not yet expanded and deformed, one end of the catheter 52 with the threaded interface 53 and the airbag 63 are placed on the patient's lesion. When placing the airbag 63, the airbag 63 should be placed on one side of the lesion, that is, when the liquid medicine flows inside the catheter 52, it must first pass through the patient's lesion, and then flow to the airbag 63 at the end of the catheter 52. After the airbag 63 and the catheter 52 are placed, the syringe 21 is connected to the second connecting port 43, and the piston push rod 3 is pressed to input the air inside the syringe 21 into the interior of the airbag 63 through the air guide tube 62 and the air release valve 61. The pressing of the piston push rod 3 can be stopped after the airbag 63 is fully expanded and deformed.

[0039] After the airbag 63 is inflated and deformed, it will block the patient's ear canal, nasal cavity or throat. Then, the piston push rod 3 can be rotated forward or reversed according to the actual situation to adjust the distance between the sealing plug 31 and the first one-way valve 23. When adjusting the rotating piston push rod 3, the volume of the medicine inside the syringe 21 can be observed with reference to the scale line on the syringe 21. After adjusting the position of the sealing plug 31, the syringe 21 can be threadedly connected to the first connecting port 42, and then the piston push rod 3 can be pressed until the air inside the syringe 21 is completely discharged. Then, the drug delivery tube 22 can be connected to the first one-way valve 23.

[0040] Then, the piston push rod 3 is pulled upward until the baffle 12 contacts the sealing cover plate 11, and then the pulling is stopped. Then, the piston push rod 3 is pressed again, and the liquid medicine inside the syringe 21 is squeezed into the second one-way valve 51 and the catheter 52 by means of the piston push rod 3 and the sealing plug 31, until the liquid medicine is evenly sprayed around from the through hole at the end of the catheter 52. Excess liquid medicine will be blocked by the inflated and deformed air bag 63, so that excess liquid medicine will not flow into the ear canal, nasal cavity or deep throat, causing discomfort to the patient.

[0041] The above embodiments are only for illustrating the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention.

Claims

1. An ENT sprayer that is convenient for controlling the dosage of medicine, characterized by: The invention comprises a quantitative component (1) for quantitatively dispensing a drug, a syringe component (2) for containing the drug, a piston push rod (3) for pushing out the drug, a fixed plate component (4) for connecting the drug dispensing component (5) and the air bag component (6), a drug dispensing component (5) for guiding the drug, and an air bag component (6) for blocking excess liquid medicine, wherein the quantitative component (1) is located at one end of the syringe component (2) and is clamped on the syringe component (2), the piston push rod (3) is arranged inside the syringe component (2), and the piston push rod (3) passes through the quantitative component (1) and is slidably connected to the inside of the syringe component (2), the fixed plate component (4) is arranged at the other end of the syringe component (2) and is threadedly connected to the syringe component (2), the drug dispensing component (5) is transversely connected to the fixed plate (41), the air bag component (6) is located on one side of the drug dispensing component, and the air bag component (6) is connected to the drug dispensing component (5).

2. The ENT sprayer for easy control of drug dosage according to claim 1, characterized in that: The quantitative assembly (1) comprises a sealing cover plate (11) and a baffle plate (12), wherein the sealing cover plate (11) is transversely arranged at one end of the syringe assembly (2), and the sealing cover is clamped on the syringe assembly (2), and the baffle plate (12) is transversely arranged inside the syringe assembly (2), and the baffle plate (12) is threadedly connected to the piston push rod (3).

3. The ENT sprayer for easy control of drug dosage according to claim 2, characterized in that: The syringe assembly (2) comprises a syringe (21), a medicine feed tube (22) and a first one-way valve (23). The medicine feed tube (22) is transversely arranged at one end of the syringe (21) and connected to the syringe (21). The first one-way valve (23) is transversely arranged at the medicine feed tube (22) and is plugged into the medicine feed tube (22).

4. The ENT sprayer for controlling the dosage of medicine according to claim 3, characterized in that: The syringe (21) is provided with scale lines.

5. The ENT sprayer for easy control of medicine dosage according to claim 3, characterized in that: A sealing plug (31) is connected to the end of the piston push rod (3).

6. The ENT sprayer for controlling the dosage of medicine according to claim 1, characterized in that: The fixing plate assembly (4) includes a fixing plate (41), a first connecting port (42) and a second connecting port (43). The first connecting port (42) is transversely arranged at one end of the fixing plate (41) and connected to the fixing plate (41), and the drug delivery assembly (5) is connected to the first connecting port (42). The second connecting port (43) is located on one side of the first connecting port (42) and is also connected to the fixing plate (41). The airbag assembly (6) is connected to the second connecting port (43).

7. The ENT sprayer for controlling the dosage of medicine according to claim 6, characterized in that: The drug delivery assembly (5) comprises a second one-way valve (51), a catheter (52) and a threaded interface (53). One end of the second one-way valve (51) is threadedly connected to the first connection port (42). The catheter (52) is plugged into the other end of the second one-way valve (51). The threaded interface (53) is located at the other end of the catheter (52) and is plugged into the catheter (52). The airbag assembly (6) is threadedly connected to the threaded interface (53).

8. The ENT sprayer for controlling the dosage of medicine according to claim 7, characterized in that: The airbag assembly (6) comprises an air release valve (61), an air guide tube (62), an airbag (63) and a sealing plate (64); the airbag (63) is threadedly connected to the threaded interface (53); the sealing plate (64) is located inside the airbag (63) and connected to the air inlet of the airbag (63); the air guide tube (62) is located inside the catheter (52) and one end of the air guide tube (62) is plugged into the sealing plate (64); the other end of the air guide tube (62) is plugged into the air release valve (61); the air release valve (61) is located at the second connecting port (43) and connected to the second connecting port (43).

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