Composite medicine belt bubble cap type dry powder inhaler

Abstract

The invention relates to a composite medicine belt bubble cap type dry powder inhaler, and belongs to the field of medical instruments. Comprising a main body part, a suction nozzle assembly, a counting assembly, a dosing assembly and a shell, a ratchet wheel serving as a driving wheel in the dosing assembly is embedded in a ratchet wheel gear and drives the ratchet wheel gear to rotate so that remaining gear parts in the whole device can rotate in a matched mode, and the ratchet wheel gear is in direct meshing transmission with one of counting linkage gears. The whole device is few in parts, compact in structure and convenient to install, the installation and production efficiency is improved, meanwhile, the fluency and stability of the dosing process can be guaranteed, and the compliance of a patient is improved.

Description

Technical Field

[0001] The present invention relates to a composite strip blister type dry powder inhaler, which is used in cooperation with a blister aluminum strip capable of carrying a certain dose of powder. Among them, the blister aluminum strip has a plurality of spaced blister bags, and the blister bags include pockets for placing the powder and / or peelable cover sheets covering the pockets. Background Art

[0002] In the known technical field of blister type powder inhalers, there are various different types of device structures. The commonly seen blister type powder inhalers on the market at present include a main body part, a mouthpiece assembly, a counting assembly, a drug delivery assembly and a housing structure. When a patient is using it, by opening the rotating cover in the housing structure, while exposing the mouthpiece, the rotating cover also serves as the operation switch of the whole inhaler, driving the rotation of each gear part in the internal drug delivery assembly and the counting assembly, completing a series of actions of displaying the remaining dose inside the device and peeling the blister aluminum strip to expose the powder under the mouthpiece assembly, so that the patient's single operation can complete the inhalation preparation and the remaining dose reminder work after this inhalation administration. When the patient opens the rotating cover, an active powder inhalation treatment can be completed through the mouthpiece assembly. And when the patient finishes the action of inhaling the powder, due to the special structure in the drug delivery assembly, the rotation of the gear parts in each internal component will not be caused when the rotating cover is closed. The overall device structure of the blister type powder inhaler is connected finely and ingeniously, simplifying the operation difficulty of the patient during use and improving the patient's compliance to a certain extent.

[0003] However, there are still areas that need improvement in the existing blister type powder inhalers. For example, there are many gear components included in the drug delivery assembly of the existing blister type powder inhalers, increasing the uncertainty during the operation of the whole device; welding is used for fixation at many places inside the existing device, increasing the production and installation difficulty of the device. Summary of the Invention

[0004] The main object of the present invention is: aiming at the above problems, to provide a composite strip blister type dry powder inhaler with smooth drug delivery and stable operation.

[0005] A composite strip blister type dry powder inhaler, which is used in cooperation with a blister aluminum strip capable of carrying a certain dose of powder, the composite strip blister type dry powder inhaler includes:

[0006] A main body part for supporting the overall structure of the device, the main body part includes the blister aluminum strip and an installation housing for placing the blister aluminum strip;

[0007] A mouthpiece assembly for facilitating the patient to inhale the powder, the mouthpiece assembly comprising a mouthpiece which is placed in the patient's mouth when in use and a ventilating tube for mixing airflow and powder, one end of the ventilating tube having a filter screen facing the blister aluminum strip at a specific position, and the other end facing the mouthpiece, and one side of the ventilating tube having an opening for external airflow to pass through;

[0008] A counting assembly for the remaining dose included in the gear transmission recording device is used, wherein the counting assembly includes a counter mounting plate, a counting gear set and a counter cover, and the counting gear set includes a units counter meshing gear, a units counter gear plate, a units and tens linkage gear and a tens counter gear plate;

[0009] A drug delivery component that uses gear transmission to control the direction of the blister aluminum strip, the drug delivery component includes a gear cover plate and a drug delivery gear set, the drug delivery gear set uses a ratchet wheel connected to the rotating cover as a driving wheel, the ratchet wheel is embedded in the ratchet gear, and drives it to rotate, and relies on the coordinated transmission between the ratchet gear and the remaining gears in the drug delivery gear set to complete the overall operation, and the remaining gears in the drug delivery gear set include a pair of counter linkage gears, a transition gear, a pair of drug delivery gears and a pair of recovery flat belt gears;

[0010] A housing that contains all components and plays a protective role, including a rotating cover, a front cover and a rear cover, wherein the rotating cover also serves as a device operation switch, and the front cover is provided with a vent and a display window, wherein the vent is directly opposite to the opening of the vent pipe, and a part of the wheel disc surface of the gear disc of the ones counter and the gear disc of the tens counter can be displayed through the display window;

[0011] Furthermore, the ratchet gear is directly meshed with one of the counter linkage gears for transmission.

[0012] Furthermore, the mounting shell divides the blister aluminum tape into a medicine-carrying tape, a blister empty tape and an aluminum tape flat tape, wherein the medicine-carrying tape is the unused portion of the blister aluminum tape, the blister empty tape is the medicine-carrying blister portion of the original blister aluminum tape after use, and the aluminum tape flat tape is the sealed and peelable portion of the original blister aluminum tape after use, wherein the medicine-carrying tape is placed at the lower end position of the mounting shell, and a channel is provided at the outer side position of the mounting shell for the medicine-carrying tape to pass through to the bottom of the ventilation tube, and the width of the channel is 2.5 mm.

[0013] Furthermore, the gear cover plate is provided with a gear cover plate positioning hole facing each other, and the mounting shell is provided with a gear cover plate positioning column at a corresponding position, and the gear cover plate and the mounting shell are fixed with double buckles after being positioned facing each other.

[0014] Further, the tens counter gear disc has the same size as the units counter gear disc. The tens counter gear disc has an arc-shaped notch inside, which can cooperate to display a part of the plane of the units counter gear disc.

[0015] Further, a set of numbers from 0 to N (where N is a number greater than or equal to 1) is arranged along the circumferential direction at the outermost edge of the plane of the tens counter gear disc, and a set of numbers from 0 to 9 is arranged along the circumferential direction at an offset position on the outer edge of the plane of the units counter gear disc.

[0016] Preferably, the distance between the numbers on the units counter gear disc and the outermost edge of its plane is the same as the distance from the outermost edge of the tens counter gear disc to the outermost edge of the arc-shaped notch inside it.

[0017] Further, one or more flat belt fixing posts are provided on one side surface of the hub collar of the recovery flat belt gear, and the height of the flat belt fixing posts reaches the outer edge line of the hub collar.

[0018] Preferably, both ends of the spring in the recovery flat belt gear are bent towards the inner side and the outer side of the spring respectively.

[0019] Preferably, in the belt gear shaft of the recovery flat belt gear, a spring fixing hole is provided at the shaft end for fixing with the inwardly bent end of the spring.

[0020] Further, a plurality of small holes are opened below the ventilation pipe, which are respectively combined to form a bubble cap inlet and a bubble cap outlet, and the bubble cap inlet and the bubble cap outlet are arranged in an arc.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The total number of gears included in the drug delivery assembly is reduced, making the overall drive structure more compact, the transmission between each gear more concise and clear, reducing the device operation errors caused by the transmission errors between gears, and ensuring the stability of the drug delivery operation.

[0023] 2. The path of the blister aluminum strip is reasonably and clearly distinguished, and the reserved space can ensure the smooth passage of the blister aluminum strip without jamming or accumulation, ensuring the smoothness of the overall inhaler drug delivery.

[0024] 3. Each mounting plate inside the device is assembled by first positioning and then snap-fastening, reducing the installation difficulty during industrial production and making the installation steps convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0026] Figure 1 Schematic diagram of the positions of components in the exploded three-dimensional structure of a composite medicine strip blister-type dry powder inhaler according to a preferred embodiment of the present invention;

[0027] Figure 2 Schematic diagram of the positions of parts in the exploded three-dimensional structure of a composite medicine strip blister-type dry powder inhaler according to a preferred embodiment of the present invention;

[0028] Figure 3 Schematic diagram of the positions of parts in the exploded three-dimensional structure of a composite medicine strip blister-type dry powder inhaler in another direction according to a preferred embodiment of the present invention;

[0029] Figure 4 Expansion schematic diagram of the outer shell assembly according to a preferred embodiment of the present invention;

[0030] Figure 5 Front view of the composite medicine strip blister-type dry powder inhaler in the open state according to a preferred embodiment of the present invention;

[0031] Figure 6 Cross-sectional view of the composite medicine strip blister-type dry powder inhaler according to a preferred embodiment of the present invention;

[0032] Figure 7 Schematic diagram of the exploded three-dimensional structure of the drug delivery assembly according to a preferred embodiment of the present invention;

[0033] Figure 8 Exploded view of the recovery flat belt gear in one direction according to a preferred embodiment of the present invention;

[0034] Figure 9 Exploded view of the recovery flat belt gear in another direction according to a preferred embodiment of the present invention;

[0035] Figure 10 Front view of a part of the drug delivery assembly according to a preferred embodiment of the present invention;

[0036] Figure 11 Schematic diagram of the three-dimensional structure of the drug delivery assembly in the mating state according to a preferred embodiment of the present invention;

[0037] Figure 12 Front view of the ventilation pipe according to a preferred embodiment of the present invention;

[0038] Figure 13 Side cross-sectional view of the ventilation pipe according to a preferred embodiment of the present invention;

[0039] Figure 14 Inverted schematic diagram of the ventilation pipe in one direction according to a preferred embodiment of the present invention;

[0040] Figure 15 is the front view of the cooperation state of the counting component according to a preferred embodiment of the present invention;

[0041] Figure 16 is the schematic exploded perspective view of the counting gear set according to a preferred embodiment of the present invention;

[0042] Wherein: 1 - rotating cover, 2 - front cover, 3 - rear cover, 4 - nozzle, 5 - ventilation pipe, 6 - blister aluminum strip, 7 - mounting housing, 8 - counter mounting plate, 9 - gear cover plate, 10 - dosing gear set, 11 - counting gear set, 12 - ventilation port, 13 - display window, 14 - pinch groove, 15 - ratchet, 16 - ratchet gear, 17a / 17b - counter linkage gear, 18 - intermediate gear, 19a / 19b - dosing conveying gear, 20a / 20b - recovery flat belt gear, 21 - unit counter meshing gear, 22 - unit counter gear disk, 23 - unit and ten - digit linkage gear, 24 - ten - digit counter gear disk, 25 - counter cover, 26 - elastic tooth, 27 - tooth position, 28 - limit projection, 29 - aluminum strip flat belt, 30 - blister empty belt, 31 - medicine - carrying belt, 32 - unit counter engaging tooth, 33 - ten - digit counter gear notch, 34a / 34b - gear cover plate positioning hole, 35a / 35b - gear cover plate positioning post, 36 - belt gear shaft, 37 - spring, 38 - hub ring, 39 - spring fixing hole, 40 - flat belt fixing post, 41 - mixed air inlet, 42 - dosing air inlet, 43 - blister inlet, 44 - blister outlet, 45 - dosing outlet, 101 - housing, 102 - nozzle assembly, 103 - counting component, 104 - dosing component, 105 - main body part. Detailed implementation manners

[0043] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations.

[0044] Figures 1 to 4 A preferred embodiment of the composite medicine - belt blister - type dry powder inhaler of the present invention is shown. Similar to the traditional structure, it also includes structural components such as a main body part 105, a nozzle assembly 102, a counting component 103, a dosing component 104, and a housing 101. Wherein:

[0045] The housing 101 that protects all components, including a rotating cover 1, a front cover 2, and a rear cover 3. The rotating cover 1 also serves as the operation switch of the device.

[0046] The mouthpiece assembly 102 facilitating the inhalation of medicinal powder by patients includes a mouthpiece 4 placed in the patient's mouth during use and an air pipe 5 for mixing air flow and medicinal powder. One end of the air pipe 5 has a blister aluminum strip 6 with a filter facing a specific position, and the other end faces the mouthpiece 4. Meanwhile, there is an opening on one side of the air pipe 5 for external air flow to pass through.

[0047] The counting component 103 for recording the remaining dose contained in the gear-driven recording device includes a counter mounting plate 8, a counting gear set 11, and a counter cover 25. The counting gear set 11 includes a units counter meshing gear 21, a units counter gear disk 22, a units and tens linkage gear 23, and a tens counter gear disk 24.

[0048] The medicine delivery component 104 for controlling the movement direction of the blister aluminum strip 6 using gear transmission includes a gear cover plate 9 and a medicine delivery gear set 10. The medicine delivery gear set 10 includes a ratchet 15, a ratchet gear 16, a counter linkage gear 17a / 17b, a transition gear 18, medicine delivery gears 19a / 19b, and a recovery flat belt gear 20a / 20b.

[0049] The main body part 105 of the overall structure of the support device includes the blister aluminum strip 6 and a mounting housing 7 for placing the blister aluminum strip 6.

[0050] As Figure 5 shown, an air vent 12 and a display window 13 are provided on the front cover 2 of the outer shell 101. The air vent 12 is opposite the side opening position of the air pipe 5 inside the device, facilitating the inflow of air. During patient inhalation, it can disturb the medicinal powder and air flow, improving the applicability of the device. The display window 13 can display partial wheel disk surfaces of the units counter gear disk 22 and the tens counter gear disk 24, enabling patients to know the remaining medicinal powder dose inside the device. A pinch groove 14 is provided on the rotating cover 1, which is beneficial for patients to rotate and open the rotating cover 1 to expose the internal mouthpiece 4 during use.

[0051] As Figures 6 - 11 shown, the mounting housing 7 divides the packaging aluminum strip 6 into a medicine-carrying strip 31, a blister empty strip 30, and an aluminum strip flat strip 29. The medicine-carrying strip 31 is the unused part of the blister aluminum strip 6, the blister empty strip 30 is the medicine-carrying blister part of the original blister aluminum strip 6 after use, and the aluminum strip flat strip 29 is the peelable sealing part of the original blister aluminum strip 6 after use. Among them, the medicine-carrying strip 31 is located at the lower end position of the mounting housing 7, the blister empty strip 30 is located in the middle position of the mounting housing 7, and the aluminum strip flat strip 29 is located at the upper end position of the mounting housing 7. Vertical channels are provided at both outer ends of the mounting housing 7 for the medicine-carrying strip 31 to pass through and reach the lower end of the air pipe 5.

[0052] In the drug delivery gear set 10, the ratchet 15 is latched with the rotary cap 1. The ratchet 15 is embedded in the ratchet gear 16. The back teeth of the ratchet gear 16 are directly meshed with the counter linkage gear 17a, the intermediate gear 18, and the drug delivery gear 19a. The intermediate gear 18 is simultaneously meshed with the counter linkage gear 17b. The drug delivery gear 19a is meshed with the drug delivery gear 19b. The drug delivery gears 19a / 19b are respectively meshed with the recovery flat belt gears 20a / 20b. When the patient uses the device and opens the rotary cap, the rotary cap 1 rotates to drive the ratchet 15 to rotate clockwise. At the same time, the ratchet gear 16 rotates clockwise, driving the counter linkage gear 17a, the intermediate gear 18, and the drug delivery gear 19a to rotate counterclockwise. The counter linkage gear 17b, the recovery flat belt gear 20a, and the drug delivery gear 19b rotate clockwise, while the recovery flat belt gear 20b rotates counterclockwise.

[0053] Elastic teeth 26 are provided on the ratchet 15, and tooth positions 27 are provided on the ratchet gear 16. The two have the same number. At the same time, a limiting protrusion 28 is provided on the gear cover plate 9. The cooperation of the three makes it so that only when the patient opens the rotary cap 1, that is, when the ratchet 15 rotates clockwise, the elastic teeth 26 of the ratchet 15 are in the unfolded state. The elastic teeth will contact the tooth positions 27 of the ratchet gear 16 and push the ratchet gear 16 to rotate synchronously clockwise. At this time, the limiting protrusion 28 on the gear cover plate 9 does not restrict the ratchet gear 16, the overall drug delivery assembly 104 is activated, and the drug delivery gear set 10 performs transmission operation. When the patient closes the rotary cap 1, that is, when the ratchet 15 rotates counterclockwise, the limiting protrusion 28 will restrict the ratchet gear 16 from rotating synchronously. The overall drug delivery assembly 104 is not activated, and the drug delivery gear set 10 does not perform transmission operation. At this time, the elastic teeth 26 on the ratchet 15 are in a compressed state under pressure, so the action of the patient closing the rotary cap 1 is not restricted.

[0054] The non-gear end portions of the recovery flat belt gears 20a / 20b are connected to the aluminum belt flat belt 29. The non-gear end portions of the drug delivery gears 19a / 19b correspond to the lower ends of the ventilation pipes 5. The non-gear end portions of the counter linkage gears 17a / 17b are connected to the blister empty belt 30. When the drug delivery assembly 104 is activated, the drug delivery gear set 10 performs transmission operation, causing the blister aluminum belt 6 to be pulled to the non-gear end portions of the drug delivery gears 19a / 19b. At this time, the drug-carrying belt 31 is peeled off and divided into the aluminum belt flat belt 29 and the blister empty belt 30.

[0055] As Figures 8 - 9As shown, the recycling flat belt gear 20a / 20b consists of a belt gear shaft 36, a spring 37, and a hub ring 38. The belt gear shaft 36 can be regarded as a gear disc and a shaft body, which are of an integral structure. There is a spring fixing hole 39 in the shaft body part of the belt gear shaft 36. Both ends of the spring 37 have inward and outward bends. The inward bend is matched with the spring fixing hole 39, so that the spring 37 can be sleeved and fixed on the belt gear shaft 36. The hub ring 38 is similar to a cylinder in shape, and there are two parallel flat belt fixing posts 40 on the side end face. Two holes are correspondingly arranged at the starting end of the aluminum strip flat belt 29, which can be sleeved on the flat belt fixing posts 40 to ensure that the aluminum strip flat belt 29 is pulled as the recycling flat belt gear 20a / 20b rotates. The top surface of the flat belt fixing post 40 is attached to the outer edge line of the hub ring 38, so that the aluminum strip flat belt 29 is stored in a positive circular form. There are multiple structural ribs inside the hub ring 38, which can be used to fix the outward bent end of the spring 37. When the hub ring 38 and the belt gear shaft 36 rotate relatively in opposite directions, the spring 37 will exert a certain force on the hub ring 38 due to torsion, ensuring the smoothness of the overall drug administration process.

[0056] On the gear cover plate 9, there are opposing gear cover plate positioning holes 34a / 34b, and on the installation housing 7 at the corresponding position, there are gear cover plate positioning posts 35a / 35b. The gear cover plate 9 and the installation housing 7 are fixed by double buckles.

[0057] As Figures 12 - 14 shown, the opening part of the ventilation pipe 5 corresponding to the ventilation port 12 is divided into a plurality of mixed air inlets 41 and a drug administration air inlet 42. There are a plurality of small holes at the lower end of the ventilation pipe 5, which are respectively combined to form a blister inlet 43 and a blister outlet 44. During the normal operation of the device, the blister inlet 43 and the blister outlet 44 are located above the drug-containing blisters of the peeled aluminum strip flat belt 29, and their arc arrangement can cause disturbance when the air flow passes through the inside of the blisters, so that the powder is initially dispersed.

[0058] During the use by the patient, the external air flow enters the ventilation pipe 5 through the drug administration air inlet 42, flows through the blister inlet 43 and enters the drug-containing blisters of the peeled aluminum strip flat belt 29. The air flow drives the powder in the blisters through the blister outlet 44. At this time, the powder is mixed with the air entering from the mixed air inlets 41 in the ventilation pipe 5. After the powder is mixed and dispersed, it enters the suction nozzle 4 through the drug administration outlet 45 and is finally inhaled by the patient through the suction nozzle 4.

[0059] As Figures 15 - 16As shown, the tens counter gear disk 24 is the same size as the units counter gear disk 22. The tens counter gear disk 24 has an arc-shaped notch inside, which can cooperate with a partial plane of the units counter gear disk 22. Along the outer edge of the plane of the tens counter gear disk 24, a set of numbers from 0 to 3 is arranged in the counterclockwise direction along the circumference. Along the outer edge of the plane of the units counter gear disk 22 at an offset position, a set of numbers from 0 to 9 is arranged in the clockwise direction along the circumference. The distance between the numbers on the units counter gear disk 22 and the outermost edge of its plane is the same as the distance from the outermost edge of the tens counter gear disk 24 to the outermost edge of its internal arc-shaped notch.

[0060] In the dosing gear set 10, the non-gear end of the counter linkage gear 17a can be engaged with the units counter meshing gear 21 in the counting gear set 11. The units counter meshing gear 21 is directly engaged with the units counter gear disk 22. Therefore, when the patient opens the rotary cap 1, the counter linkage gear 17a will drive the units counter meshing gear 21 to rotate counterclockwise, and the units counter gear disk 22 will rotate clockwise, making the units digit of the remaining dose in a countdown state.

[0061] A single units counter tooth 32 is provided in the gear inner ring of the units counter gear disk 22. This units counter tooth 32 will engage and rotate with the units-tens linkage gear 23 once when the units counter gear disk 22 rotates one full circle around the circumference. The units-tens linkage gear 23 is directly engaged with the tens counter gear disk 24, so that when the units counter gear disk 22 rotates one full circle, the tens counter gear disk 24 only rotates one tooth position. When the patient opens the rotary cap 1, the units-tens linkage gear 23 rotates asynchronously clockwise, driving the tens counter gear disk 24 to rotate counterclockwise, making the tens digit of the remaining dose in a countdown state.

[0062] When the tens counter gear disk 24 runs to a certain angle, the tens counter gear notch 33 will rotate to the original meshing position of the tens counter gear disk 24 and the units-tens linkage gear 23, making the two become non-meshing. At this time, only the blank gear disk surface can be observed through the display window 13 on the front cover 2, that is, all the medicine powder in the device has been used up.

[0063] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are only for the convenience of simplifying the description of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, in the description of the present invention, "a plurality of" means two or more, unless otherwise specifically defined.

[0064] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite strip blister type dry powder inhaler for use with a blister aluminum strip capable of carrying a certain dose of powder, said composite strip blister type dry powder inhaler comprises: A main body part that supports the overall structure, said main body part including said blister aluminum strip and a mounting housing for placing said blister aluminum strip; A mouthpiece assembly for facilitating the patient to inhale the powder, said mouthpiece assembly including a mouthpiece that the patient puts into the mouth during use and an air pipe for mixing the air flow and the powder, one end of said air pipe having a filter screen facing a specific position of said blister aluminum strip, the other end facing said mouthpiece, and at the same time one side of said air pipe having an opening for the external air flow to pass through; A counting assembly that uses a gear drive to record the remaining dose contained in the device, said counting assembly including a counter mounting plate, a counting gear set and a counter cover, said counting gear set including a units counter meshing gear, a units counter gear disc, a units and tens linkage gear and a tens counter gear disc; A dosing assembly that uses a gear drive to control the movement direction of said blister aluminum strip, said dosing assembly including a gear cover plate and a dosing gear set, and using a ratchet wheel connected to the rotary cover as the driving wheel, said ratchet wheel being embedded in a ratchet gear and driving it to rotate, and relying on the cooperation and transmission between the ratchet gear and the other gears in the dosing gear set to complete the overall operation, the other gears in said dosing gear set including a pair of counter linkage gears, a transition gear, a pair of dosing conveying gears and a pair of recovery flat belt gears, said recovery flat belt gear being composed of three components, including a belt gear shaft, a spring and a hub sleeve, said spring being sleeved on said belt gear shaft, and said hub sleeve being sleeved on said spring; A housing that contains all the components and plays a protective role, including a rotary cover, a front cover and a rear cover, wherein said rotary cover also serves as the operation switch of the device, said front cover being provided with a ventilation port and a display window, said ventilation port being directly opposite the opening position of said air pipe, and through said display window, a part of the wheel disc surfaces of said units counter gear disc and said tens counter gear disc can be displayed; It is characterized in that, said ratchet gear is directly meshed and driven with one of said counter linkage gears.

2. The composite strip blister type dry powder inhaler according to claim 1, It is characterized in that, Said mounting housing divides said blister aluminum strip into a medicine-carrying strip, a blister empty strip and an aluminum strip flat strip for placement. Said medicine-carrying strip is the unused part of said blister aluminum strip, said blister empty strip is the medicine-carrying blister part of the original said blister aluminum strip after use, and said aluminum strip flat strip is the peelable part of the seal of the original said blister aluminum strip after use. Among them, said medicine-carrying strip is placed at the lower end position of said mounting housing, and a passage for said medicine-carrying strip to pass under said air pipe is provided at the outer side position of said mounting housing, and the width of this passage is 2.5 mm.

3. The composite strip blister type dry powder inhaler according to claim 2, It is characterized in that, The gear cover plate is provided with opposed gear cover plate positioning holes, and the installation housing is provided with gear cover plate positioning posts at corresponding positions. After the gear cover plate and the installation housing are positioned oppositely, they are fixed by double snap fasteners.

4. The composite medicine strip blister type dry powder inhaler according to claim 1, wherein, the tens counter gear disk and the units counter gear disk are of the same size, and the tens counter gear disk has an arc-shaped notch inside, which can cooperate to display a part of the plane of the units counter gear disk.

5. The composite medicine strip blister type dry powder inhaler according to claim 6, wherein, a set of numbers from 0 to N are arranged along the circumferential direction on the outermost edge of the plane of the tens counter gear disk, where N is a number greater than or equal to 1, and a set of numbers from 0 to 9 are arranged along the circumferential direction at an offset position on the outer edge of the plane of the units counter gear disk.

6. The composite medicine strip blister type dry powder inhaler according to claim 7, wherein, the distance between the numbers on the units counter gear disk and the outermost edge of its plane is the distance from the outermost edge of the tens counter gear disk to the outermost edge of the arc-shaped notch inside it.

7. The composite medicine strip blister type dry powder inhaler according to claim 1, wherein, one or more flat belt fixing posts are arranged on the single side of the hub collar in the recovery flat belt gear, and the height of the flat belt fixing posts reaches the outer edge line of the hub collar.

8. The composite medicine strip blister type dry powder inhaler according to claim 9, wherein, both ends of the spring in the recovery flat belt gear are bent towards the inner side and the outer side of the spring respectively.

9. The composite medicine strip blister type dry powder inhaler according to claim 10, wherein, in the belt gear shaft in the recovery flat belt gear, the shaft end has a spring fixing hole for fixing with the inwardly bent end of the spring.

10. The composite medicine strip blister type dry powder inhaler according to claim 1, wherein, a plurality of small holes are opened below the ventilation pipe, which are respectively combined to form a blister inlet and a blister outlet, and the blister inlet and the blister outlet are arranged in an arc.

Images