A powder inhalation device that can be easily disassembled and assembled

Abstract

This invention discloses a conveniently detachable powder inhalation device, comprising a mouthpiece assembly, which includes a mouthpiece and a spiral channel positioning seat. The mouthpiece has a receiving cavity, and the spiral channel positioning seat is detachably installed in the receiving cavity. The spiral channel positioning seat has a through spiral channel in the middle, and the spiral channel is connected to the opening of the mouthpiece. A drug storage mechanism is also included, with the mouthpiece assembly movably mounted on top of the drug storage mechanism. The drug storage mechanism includes a metering disc support and a drug storage support installed in the inner cavity of the metering disc support. A rotating scraper is fitted onto the drug storage support, and the drug storage support and the rotating scraper are positioned and installed together. The drug storage support has a drug storage chamber, and the rotating scraper has a powder extraction pipe connected to the spiral channel. An end cap is detachably installed on top of the metering disc support, and the bottom of the end cap has a protruding sealing structure that matches the opening of the drug storage chamber. This powder inhalation device solves the technical problems of difficult and easily lost drug plugs, complex positioning between parts, and optimized air resistance.

Description

Technical Field

[0001] This invention belongs to the field of inhalation device technology, and more specifically, relates to a powder inhaler that can be easily disassembled and assembled. Background Technology

[0002] Currently, existing powder inhalation devices use plugs to seal the powder, but these plugs are small, difficult to remove and easily lost or detached, leading to powder leakage. Furthermore, the end caps mounted on top lack an effective fixing method, relying solely on interference fit, which makes them prone to detachment. To prevent the end caps and spiral channels from loosening vertically, a cantilever support structure is designed above the end cap for unidirectional support. Existing cantilever structure molds use a slanted ejection method, resulting in complex molds with short lifespans, and they also obstruct airflow within the assembly cavity. Current methods use multiple cylindrical ribs for component positioning, but these are not easily guided accurately into the assembly slot during top-to-bottom assembly. Summary of the Invention

[0003] The main objective of this invention is to provide a powder inhalation device that can be easily disassembled and assembled, solving the technical problems of difficult and easily lost plugs, complex positioning between parts, and optimized air resistance.

[0004] According to a first aspect of the present invention, a powder inhalation device that is easily detachable and assembled is provided, comprising:

[0005] A suction nozzle assembly, comprising a suction nozzle and a spiral channel positioning seat, wherein the suction nozzle has a receiving cavity, the spiral channel positioning seat is detachably installed in the receiving cavity, and the spiral channel positioning seat has a through spiral channel in the middle, the spiral channel being connected to the opening of the suction nozzle;

[0006] The drug storage mechanism includes a suction nozzle assembly movably mounted on the top of the drug storage mechanism. The drug storage mechanism includes a metering tray support and a drug storage bracket installed in the inner cavity of the metering tray support. The drug storage bracket is fitted with a rotating scraper, which is positioned through a first positioning hole and installed on the drug storage bracket. The drug storage bracket has a drug storage chamber, and the rotating scraper has a powder suction pipe connected to the spiral channel.

[0007] An end cap is detachably installed on the top of the metering tray support. The bottom of the end cap has a protruding sealing structure that matches the opening of the drug storage chamber to seal the drug storage chamber.

[0008] In a specific embodiment of the present invention, the end cap is provided with an arc-shaped flow guide cantilever in the middle, and the front end of the arc-shaped flow guide cantilever extends upward to form an arc structure.

[0009] In a specific embodiment of the present invention, the accommodating cavity is provided with a plurality of arrayed toothed structures around its periphery, and an upward tilting cantilever is provided on one side of the outer edge of the end cap, the upward tilting cantilever cooperating with the toothed structures.

[0010] In a specific embodiment of the present invention, a first buckle is provided at the center of the top of the quantitative tray support, and the end cover is provided with a snap-fit ​​groove that cooperates with the first buckle. The end cover is fixedly installed on the top of the quantitative tray support through the cooperation of the first buckle and the snap-fit ​​groove.

[0011] In a specific embodiment of the present invention, the end cap is provided with a positioning post at the bottom, and the quantitative tray support is provided with a second positioning hole that matches the positioning post at the top. The positioning post is inserted into the second positioning hole to install and position the end cap and the quantitative tray support.

[0012] In a specific embodiment of the present invention, the metering disc support and the end cap are respectively provided with a first powder suction hole and a second powder suction hole, the first powder suction hole and the second powder suction hole cooperating with the powder suction pipe; the metering disc support is provided with a powder filling hole that cooperates with the opening of the medicine storage chamber.

[0013] In a specific embodiment of the present invention, a positioning rib is provided between the positioning post and the sealing structure, a first limiting groove is provided on one side of the opening of the medicine storage chamber, and a second limiting groove is provided between the second positioning hole and the powder filling hole. The first limiting groove and the second limiting groove are located on the same straight line to cooperate with the positioning rib.

[0014] In a specific embodiment of the present invention, the receiving cavity is provided with a plurality of arrayed second buckles, the upper part of the metering tray support is provided with an annular groove that matches the second buckles, and the suction nozzle is movably connected to the metering tray support by fastening the second buckles to the annular groove, wherein the second buckles can rotate along the annular groove.

[0015] In a specific embodiment of the present invention, the drug storage mechanism further includes a counting gear, which is detachably installed in the inner cavity of the metering disc support.

[0016] In a specific embodiment of the present invention, the counting gear is provided with a capacity scale area, and the upper side of the quantitative disk support is provided with a visual opening, and the capacity scale area matches the visual opening.

[0017] One of the above-described technical solutions of the present invention has at least one of the following advantages or beneficial effects:

[0018] In this invention, the inhalation device integrates the sealing structure into the bottom of the end cap, eliminating the need for separate assembly of sealing parts and facilitating automated assembly, disassembly, and inspection during the production process. The latches of the metering disc support engage with the locking grooves of the end cap, effectively fixing and positioning the parts, preventing loosening, and facilitating disassembly. The end cap features positioning posts and ribs, employing a bidirectional guiding and assembly method to effectively prevent rotation and misalignment between the end cap and the metering disc support during assembly. A circular arc-shaped flow guide cantilever is located in the center of the end cap; this arc shape facilitates the outflow of air from the cavity into the spiral channel. An upward-tilting cantilever is located on the outer edge of the end cap; during nozzle rotation, it works in conjunction with the toothed structure of the nozzle to provide audible feedback during rotation, improving user experience and reliability. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0020] Figure 1 This is an exploded view of a conveniently detachable powder inhalation device according to one embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of a conveniently detachable powder inhalation device according to one embodiment of the present invention;

[0022] Figure 3 This is a stepped sectional view of relevant parts of a conveniently detachable powder inhalation device according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the cooperation between the end cap positioning rib and the limiting groove of the medicine storage chamber opening in one embodiment of the present invention;

[0024] Figure 5 This is a cross-sectional view of the suction nozzle in one embodiment of the present invention;

[0025] Figure 6 This is a cross-sectional view of a spiral channel positioning seat in one embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the end cap structure in one embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the end cap from another angle in one embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of a quantitative disc support in one embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of the structure of a drug storage stent in one embodiment of the present invention;

[0030] Figure 11This is a schematic diagram of the structure of a rotating scraper in one embodiment of the present invention. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0033] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include one or more features.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components, an indirect connection, or an interaction between two components.

[0036] The following disclosure provides many different implementations or examples for different ways of implementing the present invention.

[0037] Example 1

[0038] Reference Figures 1 to 11 As shown, a powder inhalation device that can be easily disassembled and assembled is provided, comprising:

[0039] The suction nozzle assembly includes a suction nozzle 1 and a spiral channel positioning seat 2. The suction nozzle 1 has a receiving cavity 11. The spiral channel positioning seat 2 is detachably installed in the receiving cavity 11. The spiral channel positioning seat 2 has a through spiral channel 21 in the middle. The spiral channel 21 is connected to the opening of the suction nozzle 1.

[0040] The drug storage mechanism has a suction nozzle assembly movably installed on the top of the drug storage mechanism. The drug storage mechanism includes a metering tray support 4 and a drug storage bracket 5 installed in the inner cavity of the metering tray support 4. The drug storage bracket 5 is fitted with a rotating scraper 7, which is positioned through a first positioning hole 52 and installed on the drug storage bracket 5. The drug storage bracket 5 has a drug storage chamber 51, and the rotating scraper 7 has a powder suction pipe 71 that is connected to the spiral channel 21.

[0041] End cap 3 is detachably installed on the top of metering tray support 4. The bottom of end cap 3 is provided with a protruding sealing structure 37, which matches the opening of the drug storage chamber 51 to seal the drug storage chamber 51.

[0042] In this embodiment, the suction nozzle assembly includes a suction nozzle 1 and a spiral channel positioning seat 2. The suction nozzle 1 has a receiving cavity 11, and the opening of the suction nozzle 1 is connected to the receiving cavity 11. The spiral channel positioning seat 2 is detachably installed in the receiving cavity 11. The spiral channel positioning seat 2 has a through spiral channel 21 in the middle. The opening of the receiving cavity 11 has a positioning groove, which cooperates with the upper part of the spiral channel positioning seat 2 to position the spiral channel positioning seat 2, prevent the spiral channel positioning seat 2 from loosening or shifting, and ensure the spiral channel 2... The opening of nozzle 1 is connected to the liquid level 1; the drug storage mechanism includes a metering tray support 4, a drug storage support 5 and a rotating scraper 7 installed in the inner cavity of the metering tray support 4. The drug storage support 5 has a raised drug storage chamber 51, and the rotating scraper 7 has a raised powder suction pipe 71. The drug storage support 5 has a first positioning hole 52 that matches the size of the powder suction pipe 71. The drug storage support 5 is fitted onto the rotating scraper 7 through the first positioning hole 52 and the powder suction pipe 71, and is positioned therewith. The drug storage chamber 51 and the powder... The suction pipe 71 is connected to the inner cavity of the metering disc support 4 to form a complete powder suction channel with the spiral channel 21. When the suction device is in use, the rotating scraper is used to feed the powder in a metering manner. Furthermore, the inner cavity of the metering disc support 4 is equipped with a powder metering trough. The powder in the storage chamber 51 is scraped off by the rotating scraper and enters the metering trough from the discharge port of the storage chamber 51 until the trough is full, which is the amount of powder used per use. This connects the metering trough to the powder suction pipe 71. When the user forcefully draws the powder from the suction nozzle 1... When the patient inhales, the powder in the metering tank is drawn out through the powder extraction channel into the oral cavity. As the powder flows through the spiral channel 21, the airflow in the spiral channel 21 can generate local turbulence, which facilitates the dispersion of the powder, increases the output of the powder and the amount of powder inhaled into the lungs, and improves the utilization rate of the powder. The end cap 3 is detachably installed on the top of the metering tray support 4. The bottom of the end cap 3 is provided with a raised sealing structure 37, which matches the opening of the drug storage chamber 51 to seal the drug storage chamber 51. Compared with the existing powder inhalation device that uses a separate sealing part for powder sealing, the sealing structure 37 is integrated into the bottom of the end cap 3 and is integrally formed with the end cap 3. There is no need to assemble the sealing part separately, which facilitates the automated assembly, disassembly and inspection of the production process. At the same time, the product can be equipped with one less part, which simplifies the number of parts, improves the reliability of the product, and reduces the production cost of the mold.

[0043] Furthermore, the medication storage mechanism also includes a counting gear 6, which is detachably installed inside the metering disc support 4. The counting gear 6 has a volume scale area, the scale of which corresponds to the amount of medication powder in the medication storage chamber 51. A visualization opening 46 is provided on one side of the upper part of the metering disc support 4, and the volume scale area matches the visualization opening 46. People can see the scale of the volume scale area through the visualization opening 46. At this time, the scale number displayed by the visualization opening 46 is the remaining amount of medication powder in the medication storage chamber 51. This setting can reflect the amount of medication powder in the inhaled medication storage chamber 51 in a timely and accurate manner, making it convenient for people to use or replace the device in a timely manner.

[0044] Furthermore, the receiving cavity of the suction nozzle 1 is provided with several arrayed second latches 13, and the upper part of the metering tray support 4 is provided with an annular groove 47 that cooperates with the second latches 13. The suction nozzle 1 is movably connected to the metering tray support 4 by the first latch 41 engaging with the annular groove 47. The suction nozzle 1 and the metering tray support 4 are movably connected by a snap-fit ​​mechanism, which is simple in structure, reliable in connection, and convenient for disassembly and assembly. Among them, the second latches 13 can rotate along the annular groove 47, thereby allowing the suction nozzle 1 to rotate along the metering tray support 4.

[0045] Furthermore, the lower outer wall of the nozzle 1 is provided with several arrayed friction protrusions. This arrangement can increase friction when the nozzle 1 is rotated to obtain greater frictional force.

[0046] In one embodiment of the present invention, an arc-shaped flow guide cantilever 32 is provided in the middle of the end cap 3, and the front end of the arc-shaped flow guide cantilever 32 extends upward to form an arc structure.

[0047] In this embodiment, refer to Figure 2 The front end of the arc-shaped flow guide cantilever 32 extends upward to form an arc structure. The spiral channel 21 is located directly above the arc-shaped flow guide cantilever 32. The arc-shaped flow guide structure facilitates the upward discharge of airflow from the cavity and guides it into the spiral channel 21, avoiding the generation of unnecessary resistance and reducing the resistance when the user inhales the powder.

[0048] In one embodiment of the present invention, the accommodating cavity 11 is provided with a plurality of arrayed toothed structures 12 around its periphery, and the end cap 3 is provided with an upward tilting cantilever 31 on one side of its outer edge, the upward tilting cantilever 31 cooperating with the toothed structures 12.

[0049] In this embodiment, refer to Figure 5 and Figure 7 The inner wall of the receiving cavity 11 is provided with several arrayed toothed structures 12. An upward-tilting cantilever 31 is provided on one side of the outer edge of the end cap 3. The upward-tilting cantilever 31 protrudes outward to form an angled structure to match the toothed structures 12. During the rotation of the suction nozzle 1, the upward-tilting cantilever 31 undergoes a certain degree of elastic deformation, with a relatively large deformation amount. When combined with the toothed structures 12, it can produce good sound feedback.

[0050] In one embodiment of the present invention, the quantitative tray support 4 and the end cap 3 are respectively provided with a first powder suction hole 42 and a second powder suction hole 33, the first powder suction hole 42 and the second powder suction hole 33 cooperating with the powder suction pipe 71; the quantitative tray support 4 is provided with a powder filling hole 43 that cooperates with the opening of the medicine storage chamber 51.

[0051] In this embodiment, refer to Figures 8 to 11 After the end cap 3 and the quantitative plate support 4 are assembled in place, the first powder suction hole 42 and the second powder suction hole 33 cooperate with the powder suction pipe 71. The powder can enter the spiral channel 21 through the first powder suction hole 42 and the second powder suction hole 33 and then be sucked out. The powder filling hole 43 matches the opening of the storage chamber 51. The opening of the storage chamber 51 passes through the powder filling hole 43 and cooperates with the sealing structure 37. The sealing structure 37 completes the sealing of the powder in the storage chamber 51.

[0052] In one embodiment of the present invention, a first buckle 41 is provided at the top center of the quantitative tray support 4, and a snap-fit ​​groove 34 is provided on the end cover 3 to cooperate with the first buckle 41. The end cover 3 is fixedly installed on the top of the quantitative tray support 4 through the cooperation of the first buckle 41 and the snap-fit ​​groove 34. A positioning post 35 is provided at the bottom of the end cover 3, and a second positioning hole 45 matching the positioning post 35 is provided at the top of the quantitative tray support 4. The positioning post 35 is inserted into the second positioning hole 45 to install and position the end cover 3 and the quantitative tray support 4. A positioning rib 36 is provided between the positioning post 35 and the sealing structure 37. A first limiting groove 511 is provided on one side of the opening of the medicine storage chamber 51, and a second limiting groove 44 is provided between the second positioning hole 45 and the powder filling hole 43. The first limiting groove 511 and the second limiting groove 44 are located on the same straight line to cooperate with the positioning rib 36.

[0053] In this embodiment, refer to Figure 3 , Figure 4 , Figure 8 and Figure 9 During the assembly of the end cap 3 and the metering tray support 4, the positioning post 35 is inserted into the second positioning hole 45 for positioning and guidance. A first limiting groove 511 is provided on one side of the opening of the medicine storage chamber 51, and a second limiting groove 44 is provided between the second positioning hole 45 and the powder filling hole 43. The first limiting groove 511 and the second limiting groove 44 are on the same straight line. The positioning rib 36 cooperates with the first limiting groove 511 and the second limiting groove 44 under the guidance of the second limiting groove to complete the positioning. Under the bidirectional guiding action of the positioning post 35 and the positioning rib 36, rotation and misalignment of the end cap 3 and the metering tray support 4 during assembly can be effectively prevented. Finally, after the first buckle 41 on the metering tray support 4 engages with the snap-fit ​​groove 34 of the end cap 3, the fixation and positioning of the end cap 3 and the metering tray support 4 can be further achieved, preventing loosening and facilitating disassembly and assembly.

[0054] Specifically, the structure of end cap 3 does not overlap in the projection direction. The mold for producing end cap 3 does not need to be designed with an inclined top. The production of end cap 3 can be completed by using a simple upper and lower mold. The mold structure is simple, the service life is longer, and the production cost is greatly reduced.

[0055] Example 2

[0056] The difference between Embodiment 2 and Embodiment 1 lies in the structure of the quantitative tray support 4 and the end cap 3. In Embodiment 2, the positioning post 35 and the positioning rib 36 are designed on the quantitative tray support 4, and the end cap 3 is provided with a second positioning hole 45 and a limiting groove that match the positioning post 35 and the positioning rib 36. The second positioning hole 45 and the limiting groove are connected through the end cap 3. When the end cap 3 is placed on the quantitative tray support 4, the positioning post 35 and the positioning rib 36 pass through the second positioning hole 45 and the limiting groove on the end cap 3. Because the second positioning hole 45 and the limiting groove are connected through the end cap 3, the fit between the positioning post 35 and the second positioning hole 45 and the positioning rib 36 and the limiting groove can be directly observed, avoiding blind assembly between the quantitative tray support 4 and the end cap 3. Based on Embodiment 1, Embodiment 2 strengthens the positioning between the end cap 3 and the quantitative tray support 4 while preventing blind assembly, achieving multiple layers of error prevention through both structure and visual inspection.

[0057] In this invention, the inhalation device integrates the sealing structure 37 into the bottom of the end cap 3, eliminating the need for separate assembly of sealing parts and facilitating automated assembly, disassembly, and inspection during the production process. The buckle of the metering disc support 4 engages with the snap-fit ​​groove 34 of the end cap 3, effectively fixing and positioning the parts, preventing loosening, and facilitating disassembly. The end cap 3 is equipped with positioning posts 35 and positioning ribs 36, using a bidirectional guiding and assembly method to effectively prevent rotation and misalignment between the end cap 3 and the metering disc support 4 during assembly. The end cap 3 has a circular arc-shaped flow guide cantilever 32 in the middle, which facilitates the outflow of air from the cavity and its entry into the spiral channel 21. The outer edge of the end cap 3 has an upward-tilting cantilever 31, which, during the rotation of the nozzle 1, works with the toothed structure 12 of the nozzle 1 to provide audible feedback during rotation, improving user experience and reliability.

[0058] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A powder inhalation device that can be easily disassembled and assembled, characterized in that, include: The suction nozzle assembly includes a suction nozzle (1) and a spiral channel positioning seat (2). The suction nozzle (1) has a receiving cavity (11). The spiral channel positioning seat (2) is detachably installed in the receiving cavity (11). The spiral channel positioning seat (2) has a through spiral channel (21) in the middle. The spiral channel (21) is connected to the opening of the suction nozzle (1). The receiving cavity (11) has a plurality of arrayed toothed structures (12) around its periphery. The end cap (3) has an upwardly inclined side on its outer edge. Angle cantilever (31), the upward angle cantilever (31) cooperates with the toothed structure (12), the receiving cavity is provided with a plurality of arrayed second buckles (13), the upper part of the metering plate support (4) is provided with an annular groove (47) that matches the second buckle (13), the suction nozzle (1) is fastened to the annular groove (47) through the second buckle (13) and is movably connected to the metering plate support (4), wherein the second buckle (13) can rotate along the annular groove (47); The drug storage mechanism includes a suction nozzle assembly movably mounted on the top of the drug storage mechanism. The drug storage mechanism includes a metering tray support (4) and a drug storage bracket (5) installed in the inner cavity of the metering tray support (4). The drug storage bracket (5) is fitted with a rotating scraper (7). The rotating scraper (7) is positioned through a first positioning hole (52) and installed on the drug storage bracket (5). The drug storage bracket (5) is provided with a drug storage chamber (51). The rotating scraper (7) is provided with a powder suction pipe (71) connected to the spiral channel (21). The metering tray support (4) has a first buckle (41) in the middle of its top. The end cap (3) is provided with a snap-fit ​​groove (34) that cooperates with the first buckle (41). The end cap (3) is fixedly installed on the top of the metering tray support (4) through the cooperation of the first buckle (41) and the snap-fit ​​groove (34). End cap (3), the end cap (3) is detachably installed on the top of the metering tray support (4), the bottom of the end cap (3) is provided with a protruding sealing structure (37), the sealing structure (37) matches the opening of the drug storage chamber (51) to seal the drug storage chamber (51), the middle part of the end cap (3) is provided with an arc flow guide cantilever (32), the front end of the arc flow guide cantilever (32) extends upward to form an arc structure, the metering tray support (4) and the end cap (3) are respectively provided with a first powder suction hole (42) and a second powder suction hole (33), the first powder suction hole (42) and the second powder suction hole (33) cooperate with the powder suction pipe (71); the metering tray support (4) is provided with a powder filling hole (43) that cooperates with the opening of the drug storage chamber (51).

2. The easily detachable powder inhalation device according to claim 1, characterized in that, The end cap (3) is provided with a positioning post (35) at the bottom, and the quantitative plate support (4) is provided with a second positioning hole (45) at the top that matches the positioning post (35). The positioning post (35) is inserted into the second positioning hole (45) to install and position the end cap (3) and the quantitative plate support (4).

3. The easily detachable powder inhalation device according to claim 2, characterized in that, A positioning rib (36) is provided between the positioning post (35) and the sealing structure (37). A first limiting groove (511) is provided on one side of the opening of the medicine storage chamber (51). A second limiting groove (44) is provided between the second positioning hole (45) and the powder filling hole (43). The first limiting groove (511) and the second limiting groove (44) are located on the same straight line to cooperate with the positioning rib (36).

4. The powder inhalation device that can be easily disassembled and assembled according to claim 1, characterized in that, The drug storage mechanism also includes a counting gear (6), which is detachably installed in the inner cavity of the metering disc support (4).

5. The powder inhalation device that can be easily disassembled and assembled according to claim 4, characterized in that, The counting gear (6) is provided with a capacity scale area, and the upper side of the quantitative disk support (4) is provided with a visual opening (46), and the capacity scale area matches the visual opening (46).

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