Drug delivery device for pneumology department

Abstract

The invention belongs to the technical field of atomization equipment, and discloses a pneumology department drug delivery device which comprises an atomization box body, a drug outlet assembly is arranged on one side of the atomization box body, a mounting block is fixedly connected to one side of the interior of the atomization box body, and a first driving motor is fixedly connected to the lower portion of the interior of the mounting block. The output end of the first driving motor is fixedly connected with a rotating shaft, and the outer side of one end of the rotating shaft is fixedly connected with a gear. A first driving motor is started to drive a rotating shaft to rotate, after the rotating shaft rotates, a sealing film is pulled to extend through a series of transmission, after extending, the sealing film is attached to the surface of one side of a fixing ring, at the moment, an air inlet is opened, and a patient inhales medicine; when the sealing film is used, body fluid such as respiratory tract secretions and saliva of a patient can be blocked by the sealing film and stays on the surface of the sealing film, so that cross infection is avoided, and the cross infection risk of the patient and medical staff is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of atomization equipment, and in particular relates to a drug delivery device for respiratory medicine. Background Art

[0002] When treating respiratory diseases, especially nasal inflammation, some types of diseases require patients to inhale medication. Even if the patient inhales gas containing drug particles, these gas containing drug particles will be inhaled by the human body and adhere to the patient's nasal cavity. Nowadays, general rhinitis treatment drugs are sprayed into the nasal cavity in the form of sprays. The drug types generally include hormone drugs and antihistamines. Rhinitis drugs are in liquid form, and by pressing the button of the spray bottle, they are broken into mist droplets and sprayed into the nasal cavity.

[0003] The existing nebulizer equipment is usually composed of three parts: a metal container, a metering valve and a nozzle during operation. The metal container is filled with drugs, propellants and excipients. By pressing the valve, the drugs and propellants are sprayed out in the form of aerosols. When the patient inhales the aerosolized medicine, the patient's respiratory secretions, saliva and other body fluids will enter the nebulizer with the patient's breathing, thereby increasing the difficulty of subsequent cleaning and making it more likely to cause cross infection among medical staff. Summary of the invention

[0004] The object of the present invention is to provide a drug delivery device for respiratory medicine to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a drug delivery device for respiratory medicine, comprising a nebulizer box main body, a medicine discharging assembly is arranged on one side of the nebulizer box main body, a mounting block is fixedly connected to one side of the interior of the nebulizer box main body, a first drive motor is fixedly connected to the lower part of the interior of the mounting block, an output end of the first drive motor is fixedly connected to a rotating shaft, a gear is fixedly connected to the outer side of one end of the rotating shaft, a first fixed plate is arranged on the upper side of the gear, the first fixed plate is fixedly connected to the mounting block, a rack is slidably connected to the interior of the first fixed plate, the rack is meshed with the gear, a connecting plate is fixedly connected to the top of the first fixed plate, a medicine guide ring is fixedly connected to the top of the connecting plate, a connecting column is fixedly connected to one side of the top of the rack, a sliding plate is fixedly connected to one end of the connecting column, a second fixed plate is arranged on one side of the sliding plate, the second fixed plate is fixedly connected to the first fixed plate, the sealing film is slidably connected between the second fixed plate and the sliding plate, and a quick replacement assembly is arranged on the top of the first fixed plate.

[0006] Preferably, the medicine discharging assembly includes a connecting tube and a first medicine guiding tube, the connecting tube is fixedly connected to the middle part of one side of the atomizer box main body, the first medicine guiding tube is fixedly sleeved on the inside of the connecting tube, one end of the first medicine guiding tube is fixedly connected to a medicine storage chamber, the top of the medicine storage chamber is fixedly connected to a medicine discharging tube, one end of the medicine discharging tube is fixedly connected to a mask, a medicine spraying block is fixedly connected to the inside of the atomizer box main body, one side of the medicine spraying block is fixedly connected to a second medicine guiding tube, one side of the second medicine guiding tube is provided with a fixing ring, the fixing ring is fixedly connected to the atomizer box main body, and the top of the connecting tube is fixedly connected to an air inlet.

[0007] Preferably, the quick-change assembly includes a fixed frame, the fixed frame is fixedly connected to the top of one side of the first fixed plate, the fixed frame is slidably connected to a slider inside, the top of the slider is fixedly connected to a push rod, the push rod is slidably connected to the fixed frame, the bottom of the slider is fixedly connected to a first spring, the other end of the first spring is fixedly connected to the fixed frame, the bottom of one side of the fixed frame is rotatably connected to a limiting rod, a sliding groove is opened inside the slider, a sliding column is fixedly connected to one side of the top of the limiting rod, and the sliding column is slidably connected to the inside of the sliding groove.

[0008] Preferably, the quick-change assembly also includes a top plate, which is fixedly connected to the top rod, and a plurality of second springs are fixedly connected to both sides of the bottom of the top plate, one end of the plurality of second springs is fixedly connected to the first fixed plate, and the top plate is slidably connected to the inside of the sliding plate and the second fixed plate.

[0009] Preferably, the second drug guiding tube, the fixing ring and the connecting tube are located on the same axis, and the second drug guiding tube, the fixing ring and the connecting tube have the same diameter.

[0010] Preferably, the diameter of the drug guiding ring is equal to that of the fixing ring, and two sides of the drug guiding ring are respectively in contact with the fixing ring and the second drug guiding tube.

[0011] Preferably, the bending angle at the upper corner of the outer side surface of the slide groove is greater than the bending angle of the upper side of the inner side surface of the slide groove, and the diameter length of the slide groove is less than the width of the slide groove.

[0012] Preferably, the sealing film is completely in contact with a side surface of the fixing ring after being pulled, and the sealing film is folded along the crease on its surface when being retracted.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. The present invention starts the first driving motor to drive the rotating shaft to rotate, the rotating shaft rotation drives the gear to rotate, the gear rotation drives the first fixed plate to move, the first fixed plate movement drives the sliding plate to move, the sliding plate movement pulls the sealing film to extend, after the sealing film extends a certain distance, it will fit with the surface of one side of the fixed ring, at this time the air inlet is opened, the patient inhales the medicine, at this time the sealing film is more closely fitted to the inside of the connecting tube because the patient inhales the medicine, and when the patient inhales the liquid medicine, the patient's respiratory secretions, saliva and other body fluids will be blocked by the sealing film and stay on the surface of the sealing film, thereby avoiding cross infection, reducing the risk of cross infection between patients and medical staff, and at the same time avoiding respiratory secretions, saliva and other body fluids may cause corrosion to the metal parts, plastic parts, etc. of the nebulizer, so as to extend the service life of the nebulizer and reduce the cost of replacing equipment.

[0015] 2. In the present invention, the rack is driven to move by the reverse rotation of the first driving motor, and the movement of the rack is driven to move the sliding plate, so that the sealing film is recovered, and the sealing film is folded along the crease on its surface when it is folded, so that the sealing film and the fixing ring can directly change from surface contact to line contact when it is folded, and the contact area on the contact surface is greatly reduced, so as to avoid the patient's respiratory secretions, saliva and other body fluids being retained inside the nebulizer box body when the patient inhales the medicine, further reducing the risk of cross infection between the patient and medical staff and improving safety. Secondly, the connecting plate and the drug guide ring are driven behind the rack to reconnect with the second drug guide tube and the fixing ring, so as to ensure the fluidity of the medicine.

[0016] 3. The present invention presses both sides of the sealing film, and the sealing film moves downward, which will drive the top plate to move downward, and the top plate moves downward, which will drive the push rod to move downward, and the push rod moves downward, which will drive the slider to move downward, and the slider moves downward, so that the sliding column moves along the slide groove to one side of the slide groove, and then the pressing force is released, the second spring and the first spring will be pushed out, and the second spring pushes out to drive the top plate to move upward, and the top plate moves upward and drives the sealing film to move upward, so that the sealing film is ejected to achieve quick replacement, thereby preventing the patient's respiratory secretions, saliva and other body fluids from possibly containing pathogenic microorganisms from breeding inside the nebulizer, thereby further improving the safety of the device and reducing the risk of infection. At the same time, quick replacement of components can improve replacement efficiency, make replacement simpler and more efficient, and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a cross-sectional view of the main body of the atomizer box of the present invention;

[0019] Figure 3 For the present invention Figure 2 A magnified view of the structure at center;

[0020] Figure 4 It is a structural schematic diagram of the first fixing plate of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the rack of the present invention;

[0022] Figure 6 is a cross-sectional view of a sliding plate of the present invention;

[0023] Figure 7 For the present invention Figure 6 Enlarged view of the structure at B in the middle

[0024] Figure 8 It is a structural schematic diagram of the slider of the present invention.

[0025] In the figure: 1. atomizer box body; 2. connecting pipe; 3. first drug guide pipe; 4. drug storage chamber; 5. drug outlet pipe; 6. mask; 7. drug spray block; 8. second drug guide pipe; 9. air inlet; 10. mounting block; 11. first drive motor; 12. rotating shaft; 13. gear; 14. first fixed plate; 15. rack; 16. connecting plate; 17. drug guide ring; 18. connecting column; 19. sliding plate; 20. second fixed plate; 21. sealing film; 22. fixed frame; 23. slider; 24. push rod; 25. first spring; 26. limit rod; 27. slide groove; 28. sliding column; 29. ​​top plate; 30. second spring; 31. fixed ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figures 1 to 8As shown, the embodiment of the present invention provides a drug delivery device for respiratory medicine, including a nebulizer box body 1, a medicine discharging assembly is arranged on one side of the nebulizer box body 1, a mounting block 10 is fixedly connected to one side of the inside of the nebulizer box body 1, a first driving motor 11 is fixedly connected to the lower part of the inside of the mounting block 10, a rotating shaft 12 is fixedly connected to the output end of the first driving motor 11, a gear 13 is fixedly connected to the outer side of one end of the rotating shaft 12, a first fixing plate 14 is arranged on the upper side of the gear 13, the first fixing plate 14 is fixedly connected to the mounting block 10, a rack 15 is slidably connected to the inside of the first fixing plate 14, the rack 15 is meshed with the gear 13, a connecting plate 16 is fixedly connected to the top of the first fixing plate 14, a medicine guiding ring 17 is fixedly connected to the top of the connecting plate 16, a connecting column 18 is fixedly connected to one side of the top of the rack 15, a sliding plate 19 is fixedly connected to one end of the connecting column 18, a second fixing plate 20 is arranged on one side of the sliding plate 19, the second fixing plate 20 is fixedly connected to the first fixing plate 14, and a sliding connection between the second fixing plate 20 and the sliding plate 19 The first fixed plate 14 is dynamically connected with a sealing film 21, and a quick-change component is arranged on the top of the first fixed plate 14. The first driving motor 11 is started to drive the rotating shaft 12 to rotate, and the rotation of the rotating shaft 12 drives the gear 13 to rotate, and the rotation of the gear 13 drives the first fixed plate 14 to move, and the movement of the first fixed plate 14 drives the sliding plate 19 to move, and the movement of the sliding plate 19 pulls the sealing film 21 to extend. After the sealing film 21 extends a certain distance, it will fit with the surface of one side of the fixing ring 31. At this time, the air inlet 9 is opened, and the patient inhales the medicine. At this time, the sealing film 21 fits more closely to the inside of the connecting tube 2 because the patient absorbs the medicine. When the patient inhales the liquid medicine, the patient's respiratory secretions, saliva and other body fluids will be blocked by the sealing film 21 and stay on the surface of the sealing film 21, thereby avoiding cross infection and reducing the risk of cross infection between patients and medical staff. At the same time, it is avoided that respiratory secretions, saliva and other body fluids may cause corrosion to the metal parts, plastic parts, etc. of the nebulizer, so as to extend the service life of the nebulizer and reduce the cost of replacing equipment.

[0028] The medicine discharging assembly includes a connecting tube 2 and a first medicine guiding tube 3, the connecting tube 2 is fixedly connected to the middle part of one side of the atomizing box body 1, the first medicine guiding tube 3 is fixedly sleeved inside the connecting tube 2, one end of the first medicine guiding tube 3 is fixedly connected to a medicine storage chamber 4, the top of the medicine storage chamber 4 is fixedly connected to a medicine discharging tube 5, one end of the medicine discharging tube 5 is fixedly connected to a mask 6, a medicine spraying block 7 is fixedly connected to the inside of the atomizing box body 1, one side of the medicine spraying block 7 is fixedly connected to a second medicine guiding tube 8, one side of the second medicine guiding tube 8 is provided with a fixing ring 31, the fixing ring 31 is fixedly connected to the atomizing box body 1, the top of the connecting tube 2 is fixedly connected to an air inlet 9, and the rack 15 is driven by the reverse rotation of the first driving motor 11. When the rack 15 moves, the sliding plate 19 will be driven to move, so that the sealing film 21 is recovered, and the sealing film 21 will be folded along the crease on its surface when it is folded. When it is folded, the sealing film 21 and the fixing ring 31 can directly change from surface contact to line contact, and the contact area on the contact surface is greatly reduced, so as to avoid the patient's respiratory secretions, saliva and other body fluids being retained inside the atomizer box body 1 when the patient inhales the medicine, further reducing the risk of cross infection between the patient and the medical staff and improving safety. Secondly, the rack 15 will drive the connecting plate 16 and the medicine guide ring 17 to be reconnected with the second medicine guide tube 8 and the fixing ring 31, so as to ensure the fluidity of the medicine.

[0029] Among them, the quick replacement component includes a fixed frame 22, which is fixedly connected to the top of one side of the first fixed plate 14, a slider 23 is slidably connected inside the fixed frame 22, a top rod 24 is fixedly connected to the top of the slider 23, the top rod 24 is slidably connected to the fixed frame 22, a first spring 25 is fixedly connected to the bottom of the slider 23, the other end of the first spring 25 is fixedly connected to the fixed frame 22, a limit rod 26 is rotatably connected to the bottom of one side of the fixed frame 22, a slide groove 27 is opened inside the slider 23, a sliding column 28 is fixedly connected to one side of the top of the limit rod 26, and the sliding column 28 is slidably connected to the inside of the slide groove 27, the quick replacement component also includes a top plate 29, the top plate 29 is fixedly connected to the top rod 24, a plurality of second springs 30 are fixedly connected on both sides of the bottom of the top plate 29, one end of the plurality of second springs 30 is fixedly connected to the first fixed plate 14, and the top plate 29 is slidably connected to the sliding plate 19 The second spring 30 and the first spring 25 are pushed out by the second spring 30, and the second spring 30 pushes out to drive the top plate 29 to move upward, and the top plate 29 moves upward to drive the sealing film 21 to move upward, so that the sealing film 21 is ejected to realize quick replacement, thereby preventing the patient's respiratory secretions, saliva and other body fluids from possibly containing pathogenic microorganisms from growing inside the nebulizer, thereby improving the safety of the device and reducing the risk of infection. At the same time, quick replacement of components can improve replacement efficiency, make replacement simpler and more efficient, and improve the user experience.

[0030] Among them, the second drug guiding tube 8, the fixed ring 31 and the connecting tube 2 are on the same axis, the diameters of the second drug guiding tube 8, the fixed ring 31 and the connecting tube 2 are the same, the diameter of the drug guiding ring 17 is equal to that of the fixed ring 31, and the two sides of the drug guiding ring 17 are respectively fitted with the fixed ring 31 and the second drug guiding tube 8. By setting the second drug guiding tube 8, the fixed ring 31 and the connecting tube 2 on the same axis, the medicine sprayed from the inside of the medicine spraying block 7 can pass through the second drug guiding tube 8, the fixed ring 31 and the connecting tube 2 into the inside of the first drug guiding tube 3 and thus be absorbed by the patient.

[0031] The arc angle at the upper corner of the outer side of the slide groove 27 is greater than the arc angle of the upper side of the inner side of the slide groove 27, and the diameter length of the slide groove 27 is less than the width of the slide groove 27. The arc angle at the upper corner of the outer side of the slide groove 27 is greater than the arc angle of the upper side of the inner side of the slide groove 27, so that when the sliding post 28 moves along the slide groove 27 to the corner on the top side, due to the arc angle of the outer side of the slide groove 27 being greater than the inner arc, it can pass its bending point when moving, thereby displacing to the middle of the slide groove 27 to achieve locking, and the diameter length of the slide groove 27 is less than the width of the slide groove 27, so it can fit the required surface when moving, so as to reach the desired position, and the bottom of the limit rod 26 is rotatably connected to the fixed frame 22, but when it rotates, a connecting rotating rod connects the fixed frame 22 and the limit rod 26, and the connecting rotating rod and the fixed frame 22 have greater friction, and when the slider 23 slides out of the slider 23, it can be in an upright state through the friction between them.

[0032] Among them, the sealing film 21 is completely fitted with one side of the fixing ring 31 after being pulled, and the sealing film 21 will be folded along the crease on its surface when it is folded. When it is folded, the sealing film 21 and the fixing ring 31 can directly change from surface contact to line contact, and the contact area on the contact surface is greatly reduced, thereby preventing the patient's respiratory secretions, saliva and other body fluids from being retained inside the nebulizer box main body 1 when the patient inhales the medicine.

[0033] Working principle:

[0034] When it is necessary to spray atomized medicine, the medicine spraying block 7 sprays the medicine, and the medicine enters the medicine storage chamber 4 through the second medicine guide tube 8, the medicine guide ring 17, the connecting tube 2 and the first medicine guide tube 3. At this time, the medicine will be stored in the medicine storage chamber 4. At this time, the patient needs to inhale the medicine in the medicine storage chamber 4. At this time, the first driving motor 11 starts to drive the rotating shaft 12 to rotate, and the rotation of the rotating shaft 12 drives the gear 13 to rotate. The rotation of the gear 13 drives the first fixed plate 14 to move, and the movement of the first fixed plate 14 drives the sliding plate 19 to move. The sliding plate 19 moves to pull the sealing film 21 to extend. After the sealing film 21 extends a certain distance, The sealing film 21 will fit with the surface of one side of the fixing ring 31. At this time, the air inlet 9 is opened, and the patient inhales the medicine. At this time, the sealing film 21 fits more closely to the inside of the connecting tube 2 because the patient inhales the medicine. When the patient inhales the liquid medicine, the patient's respiratory secretions, saliva and other body fluids will be blocked by the sealing film 21 and stay on the surface of the sealing film 21, thereby avoiding cross infection, reducing the risk of cross infection between patients and medical staff, and preventing respiratory secretions, saliva and other body fluids from corroding the metal parts, plastic parts, etc. of the nebulizer, thereby extending the service life of the nebulizer and reducing the cost of replacing the equipment;

[0035] After the patient has finished absorbing, the first drive motor 11 will rotate in the opposite direction to drive the rack 15 to move, and the movement of the rack 15 will drive the sliding plate 19 to move, so that the sealing film 21 is recovered, and the sealing film 21 will be folded along the crease on its surface when it is folded, and the sealing film 21 and the fixing ring 31 can directly change from surface contact to line contact when it is folded, and the contact area on the contact surface is greatly reduced, so as to avoid the patient's respiratory secretions, saliva and other body fluids being retained inside the atomizer box body 1 when the patient inhales the liquid medicine, further reducing the risk of cross infection between the patient and the medical staff, and improving safety. Secondly, the rack 15 will drive the connecting plate 16 and the drug guide ring 17 to be reconnected with the second drug guide tube 8 and the fixing ring 31, so as to ensure the fluidity of the liquid medicine;

[0036] After the sealing film 21 is folded, the two sides of the sealing film 21 are pressed. The downward movement of the sealing film 21 will drive the top plate 29 to move downward. The downward movement of the top plate 29 will drive the push rod 24 to move downward. The downward movement of the push rod 24 will drive the slider 23 to move downward. The downward movement of the slider 23 will cause the sliding column 28 to move along the slide groove 27 to one side of the slide groove 27. Then the pressing force is released and the second spring 30 and the first spring 25 will be pushed out. The second spring 30 pushes out and drives the top plate 29 to move upward. The upward movement of the top plate 29 drives the sealing film 21 to move upward, so that the sealing film 21 is ejected to achieve quick replacement, thereby preventing the patient's respiratory secretions, saliva and other body fluids from possibly containing pathogenic microorganisms from growing inside the nebulizer, thereby improving the safety of the device and reducing the risk of infection. At the same time, the quick replacement of components can improve the replacement efficiency, make the replacement simpler and more efficient, and improve the user experience.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drug delivery device for respiratory medicine, comprising a nebulizer box body (1), wherein a drug delivery assembly is disposed on one side of the nebulizer box body (1), characterized in that: A mounting block (10) is fixedly connected to one side of the interior of the atomizer box body (1), a first drive motor (11) is fixedly connected to the lower part of the interior of the mounting block (10), an output end of the first drive motor (11) is fixedly connected to a rotating shaft (12), an outer side of one end of the rotating shaft (12) is fixedly connected to a gear (13), a first fixing plate (14) is arranged on the upper side of the gear (13), the first fixing plate (14) is fixedly connected to the mounting block (10), a rack (15) is slidably connected to the interior of the first fixing plate (14), the rack (15) is meshingly connected to the gear (13), and the first The top of the fixed plate (14) is fixedly connected to a connecting plate (16), the top of the connecting plate (16) is fixedly connected to a drug guide ring (17), one side of the top of the rack (15) is fixedly connected to a connecting column (18), one end of the connecting column (18) is fixedly connected to a sliding plate (19), one side of the sliding plate (19) is provided with a second fixed plate (20), the second fixed plate (20) is fixedly connected to the first fixed plate (14), the sealing film (21) is slidably connected between the second fixed plate (20) and the sliding plate (19), and a quick-change component is provided on the top of the first fixed plate (14).

2. A drug delivery device for respiratory medicine according to claim 1, characterized in that: The medicine discharging assembly comprises a connecting tube (2) and a first medicine guiding tube (3), wherein the connecting tube (2) is fixedly connected to the middle part of one side of the atomizer box body (1), the first medicine guiding tube (3) is fixedly sleeved inside the connecting tube (2), one end of the first medicine guiding tube (3) is fixedly connected to a medicine storage chamber (4), the top of the medicine storage chamber (4) is fixedly connected to a medicine discharging tube (5), one end of the medicine discharging tube (5) is fixedly connected to a mask (6), the inside of the atomizer box body (1) is fixedly connected to a medicine spraying block (7), one side of the medicine spraying block (7) is fixedly connected to a second medicine guiding tube (8), one side of the second medicine guiding tube (8) is provided with a fixing ring (31), the fixing ring (31) is fixedly connected to the atomizer box body (1), and the top of the connecting tube (2) is fixedly connected to an air inlet (9).

3. A drug delivery device for respiratory medicine according to claim 2, characterized in that: The quick-change assembly comprises a fixed frame (22), the fixed frame (22) is fixedly connected to the top of one side of the first fixed plate (14), a slider (23) is slidably connected inside the fixed frame (22), a top rod (24) is fixedly connected to the top of the slider (23), the top rod (24) is slidably connected to the fixed frame (22), a first spring (25) is fixedly connected to the bottom of the slider (23), one end of the first spring (25) is fixedly connected to the fixed frame (22), a limit rod (26) is rotatably connected to the bottom of one side of the fixed frame (22), a sliding groove (27) is provided inside the slider (23), a sliding column (28) is fixedly connected to one side of the top of the limit rod (26), and the sliding column (28) is slidably connected to the inside of the sliding groove (27).

4. A drug delivery device for respiratory medicine according to claim 3, characterized in that: The quick-change assembly also includes a top plate (29), the top plate (29) is fixedly connected to the top rod (24), a plurality of second springs (30) are fixedly connected to both sides of the bottom of the top plate (29), the other ends of the plurality of second springs (30) are fixedly connected to the first fixed plate (14), and the top plate (29) is slidably connected to the inside of the sliding plate (19) and the second fixed plate (20).

5. A drug delivery device for respiratory medicine according to claim 4, characterized in that: The second drug guiding tube (8), the fixing ring (31) and the connecting tube (2) are located on the same axis, and the second drug guiding tube (8), the fixing ring (31) and the connecting tube (2) have the same diameter.

6. A drug delivery device for respiratory medicine according to claim 5, characterized in that: The diameter of the drug guiding ring (17) is equal to that of the fixing ring (31), and two sides of the drug guiding ring (17) are respectively in contact with the fixing ring (31) and the second drug guiding tube (8).

7. A drug delivery device for respiratory medicine according to claim 6, characterized in that: The bending angle at the upper corner of the outer side surface of the slide groove (27) is greater than the bending angle of the upper side of the inner side surface of the slide groove (27), and the diameter length of the slide groove (27) is less than the width of the slide groove (27).

8. A drug delivery device for respiratory medicine according to claim 7, characterized in that: The sealing film (21) is completely fitted with one side of the fixing ring (31) after being pulled, and the sealing film (21) is folded along the crease on its surface when being folded.

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