Dry powder inhaler capable of switching between single capsule and double capsules

Abstract

The invention relates to the technical field of dry powder inhalers, and discloses a dry powder inhaler with a single capsule and double capsules switchable, the dry powder inhaler comprises a main body and a suction nozzle rotationally connected with the main body, two accommodating cavities and a communicating cavity communicated with the accommodating cavities are integrally formed in an inner cavity of the main body, and an air port communicated with the communicating cavity is formed in the side wall of the main body; a movable cavity is concavely formed in the side wall of the main body, a sliding shell is slidably connected in the movable cavity, a pricking needle is fixedly arranged on one side of the sliding shell, a spring is fixedly arranged between the sliding shell and the movable cavity, a movable hole is formed between the movable cavity and the communicating cavity in a communicating mode, the movable hole and the pricking needle are coaxially arranged, and the head of the pricking needle is located in an inner cavity of the movable hole; a medicine feeding channel communicated with the containing cavity is formed in the middle of the suction nozzle, a filter screen assembly is movably installed on the lower portion of the medicine feeding channel, a compressible elastic plate is arranged on the suction nozzle, and the filter screen assembly can be pushed to be separated from the medicine feeding channel by pressing the elastic plate. The main body is integrally machined and formed, the number of components is small, the filter screen assembly can be easily and rapidly detached for cleaning, and daily use is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dry powder inhalers, in particular to a dry powder inhaler capable of switching between single and double capsules. BACKGROUND

[0002] Compared with oral and subcutaneous injection, pulmonary administration has obvious advantages. The mucosa of human nasal cavity, bronchus and lung has a large specific surface area, and the human respiratory tract has a total of 23 bifurcations. The total surface area of alveoli in an adult is 60-100 square meters. The alveolar wall is thin and surrounded by a large number of capillaries. Drug particles can quickly penetrate the alveolar mucosa and directly enter the blood circulation, with the advantages of no gastrointestinal degradation, no liver first-pass effect, low toxicity and side effects, and fast onset. Pulmonary administration is the best treatment for lung diseases such as asthma and chronic obstructive pulmonary disease. In recent years, it has also been gradually applied to the treatment of systemic diseases such as diabetes, and has good market prospects.

[0003] The existing Chinese patent, with the authorization announcement number CN219681391U, discloses a double-capsule powder inhaler, which includes a base, a top cover connected to the top end of the base through a mounting assembly, a suction nozzle arranged on the top of the top cover, a passage plate arranged between the base and the top cover, an out-powder cavity formed between the inner wall of the top cover and the top surface of the passage plate, an open-capsule cavity formed between the inner wall of the base and the bottom surface of the passage plate, an open-capsule mechanism slidably arranged in the inner wall of the open-capsule cavity, an out-powder mechanism arranged at the top end of the passage plate, and air inlets symmetrically arranged on the inner wall of the passage plate on both sides of the out-powder mechanism for connecting the out-powder cavity, the air inlets and the open-capsule cavity. The open-capsule mechanism includes a capsule seat, a capsule bin, a sliding block, a first breaking knife, a second breaking knife and a sliding groove. The double-capsule powder inhaler disclosed in the above patent has the problems of a large number of small components, a complex structure, high manufacturing cost, and inconvenient quick disassembly and cleaning of the filter screen at the administration channel, which easily causes drug residue and blockage of the filter holes, and brings inconvenience to actual application. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a dry powder inhaler capable of switching between single and double capsules, which solves the problems of a large number of small components, high support cost and inconvenient quick disassembly of the filter screen at the administration channel of the existing double-capsule dry powder inhaler.

[0005] To achieve the above object, the present application is implemented by the following technical solutions:

[0006] A single-double capsule switchable dry powder inhaler, comprising a main body and a suction nozzle rotationally connected with the main body, two accommodating cavities and a communication cavity communicated with the accommodating cavities are integrally formed in the inner cavity of the main body, and an air port communicated with the communication cavity is arranged on the side wall of the main body; an active cavity is arranged in the inner recess of the side wall of the main body, a sliding shell is slidably connected in the active cavity, a needle is fixedly arranged at the middle part of the sliding shell, a spring is fixedly arranged between the sliding shell and the active cavity, an active hole is arranged in communication between the active cavity and the communication cavity, the active hole is coaxially arranged with the needle and the head of the needle is located in the inner cavity of the active hole; a drug delivery channel communicated with the accommodating cavities is arranged at the middle part of the suction nozzle, a filter screen assembly is movably mounted at the lower part of the drug delivery channel, a pressable elastic plate is arranged on the suction nozzle, and the filter screen assembly can be separated from the drug delivery channel by pressing the elastic plate; a cover is buckled and covered on the outer surface of the suction nozzle.

[0007] Preferably, the filter screen assembly comprises a filter screen plate and plug-in blocks symmetrically arranged outside the filter screen plate, a filter screen groove for accommodating the filter screen plate is formed at the lower part of the suction nozzle, limit grooves for plug-in cooperation with the plug-in blocks are arranged on the groove walls on both sides of the filter screen groove, a push column is fixedly arranged on one side of the elastic plate, the push column penetrates through the limit grooves and is in clearance fit with the limit grooves, the single plug-in block is pushed out of the limit groove by the push column when the elastic plate is pressed, so that the filter screen plate is inclined in the filter screen groove.

[0008] Preferably, the size of the filter screen groove is larger than the external contour size of the filter screen plate, the size of the limit groove is larger than the external contour size of the plug-in block, and a sealing gasket is fixedly arranged along the external contour of the filter screen plate to seal the gap between the filter screen plate and the filter screen groove.

[0009] Preferably, the elastic plate is integrally formed with the suction nozzle, and a trapezoidal groove matched with the elastic plate is arranged on the suction nozzle.

[0010] Preferably, the sliding shell comprises two shell bodies, the two shell bodies are connected in series and are slidably connected with the active cavity respectively, the needle is fixedly arranged on one side of the shell body, and the spring is sleeved and arranged outside the needle and is fixedly connected with the shell body and the cavity wall of the active cavity respectively.

[0011] Preferably, plug-in slots are symmetrically arranged on the main body, and plug-in buckles matched with the plug-in slots are arranged on the suction nozzle.

[0012] Preferably, an observation window is arranged on the front end surface of the main body, and a transparent plate is arranged in the observation window to observe the internal condition of the accommodating cavities.

[0013] Preferably, a plurality of buckle protrusions are arranged on the outer surface of the suction nozzle, a cavity with the same external contour size as the suction nozzle is arranged in the inner cavity of the cover, and a groove matched with the buckle protrusions is formed on the cavity wall of the cavity.

[0014] Preferably, an inner groove is formed on the side wall of the active cavity, and a protruding edge is integrally formed on the sliding shell and is slidably connected with the inner groove.

[0015] The application has the following beneficial effects:

[0016] The single-double capsule switchable dry powder inhaler effectively reduces the overall components of the dry powder inhaler by arranging the accommodating cavity, the communication cavity and the movable cavity in the inner cavity of the main body. The main body can be processed by injection molding, and is integrally processed without the need of assembling excess accessories, thereby saving manufacturing and assembling costs. The movable hole arranged on the needle head is sleeved to ensure the accurate movement of the needle. The spring can ensure the stable reset of the sliding shell after pressing. The elastic plate and the filter screen assembly can separate the filter screen assembly from the suction nozzle by pressing the elastic plate when the filter screen assembly needs to be disassembled, so as to quickly complete the disassembly of the filter screen assembly for subsequent cleaning and improve the stability during long-term application. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a front view of the overall structure of the application;

[0018] Figure 2 It is a first perspective view of the application after being disassembled;

[0019] Figure 3 It is a second perspective view of the application after being disassembled;

[0020] Figure 4 It is a bottom view of the application;

[0021] Figure 5 It is a sectional view of the application in the A-A direction; Figure 4

[0022] Figure 6 It is a sectional view of the application in the B-B direction; Figure 4

[0023] It is an enlarged view of the A area of the application; Figure 7 Figure 6 It is a disassembled structure diagram of the filter screen plate and the suction nozzle of the application.

[0024] Figure 8 In the figure: 1, main body; 11, accommodating cavity; 12, communication cavity; 13, air port; 14, movable cavity; 15, movable hole; 16, insertion slot; 17, observation window; 2, sliding shell; 21, needle; 22, spring; 3, suction nozzle; 31, drug delivery channel; 32, filter screen groove; 33, elastic plate; 34, pushing column; 35, insertion buckle; 36, buckle protrusion; 4, filter screen assembly; 41, filter screen plate; 42, insertion block; 43, sealing gasket; 5, cover body. DETAILED DESCRIPTION

[0025]

[0026] ​​​Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present application.

[0027] A single-double capsule switchable dry powder inhaler, comprising a main body 1 and a suction nozzle 3 rotationally connected with the main body 1, two accommodating cavities 11 and a communication cavity 12 communicated with the accommodating cavities 11 are integrally formed in the inner cavity of the main body 1, and an air port 13 communicated with the communication cavity 12 is arranged on the side wall of the main body 1; an active cavity 14 is arranged in the inner recess of the side wall of the main body 1, a sliding shell 2 is slidably connected in the active cavity 14, a needle 21 is fixedly arranged in the middle part of the sliding shell 2, a spring 22 is fixedly arranged between the sliding shell 2 and the active cavity 14, an active hole 15 is arranged in communication between the active cavity 14 and the communication cavity 12, the active hole 15 is coaxially arranged with the needle 21 and the head of the needle 21 is located in the inner cavity of the active hole 15; a dosing channel 31 communicated with the accommodating cavities 11 is arranged in the middle part of the suction nozzle 3, a filter screen assembly 4 is movably mounted below the dosing channel 31, a pressable elastic plate 33 is arranged on the suction nozzle 3, and pressing the elastic plate 33 can push the filter screen assembly 4 to separate from the dosing channel 31; a cover 5 is buckled and covered outside the suction nozzle 3.

[0028] As Figure 1 , Figure 2 and Figure 3 shown in the above technical solution, the accommodating cavities 11, the communication cavity 12 and the active cavity 14 are integrally arranged in the inner cavity of the main body 1, which effectively reduces the components of the dry powder inhaler as a whole, the main body 1 can be processed by injection molding, and is integrally processed without the need for assembling excess accessories, thereby saving manufacturing and assembly costs; the active hole 15 sleeved and arranged on the head of the needle 21 is used to ensure the accurate movement of the needle 21; the spring 22 arranged thereon can ensure the stable resetting of the sliding shell 2 after being pressed; the elastic plate 33 and the filter screen assembly 4 arranged thereon can separate the filter screen assembly 4 from the suction nozzle 3 by pressing the elastic plate 33 when the filter screen assembly 4 needs to be disassembled, so as to quickly complete the disassembly of the filter screen assembly 4 for subsequent cleaning, thereby improving the stability during long-term application.

[0029] In the technical solution, the filter screen assembly 4 comprises a filter screen plate 41 and plug-in blocks 42 symmetrically arranged outside the filter screen plate 41, a filter screen groove 32 for accommodating the filter screen plate 41 is formed in the lower part of the suction nozzle 3, limit grooves for plug-in cooperation with the plug-in blocks 42 are arranged on the groove walls on both sides of the filter screen groove 32, a push column 34 is fixedly arranged on one side of the elastic plate 33, the push column 34 penetrates through the limit grooves and gap cooperates with the limit grooves, pressing the elastic plate 33 pushes a single plug-in block 42 to separate from the limit groove, so as to make the filter screen plate 41 inclined to the filter screen groove 32.

[0030] The size of the filter screen groove 32 is greater than the external contour size of the filter screen plate 41, the limiting groove size is greater than the external contour size of the plug-in block 42, the filter screen plate 41 is fixedly arranged along the external contour to seal the gasket 43, and the gap between the filter screen plate 41 and the filter screen groove 32 is filled.

[0031] As shown in Figure 7 With Figure 8 In the above technical solution, the plug-in block 42 and the limiting groove can quickly install the filter screen plate 41, and the gasket 43 fixedly arranged along the external contour of the filter screen plate 41 can ensure the sealing of the entire suction nozzle 3 after the installation of the filter screen plate 41, so as to ensure the stability when inhaling the medicine. Through the push column 34 and the elastic plate 33, the push column 34 can push the plug-in block 42 out of the limiting groove by pressing the elastic plate 33, so that the filter screen plate 41 is inclined on one side of the filter screen groove 32. At this time, the filter screen plate 41 can be dropped or taken out by the user. Compared with the traditional buckle type installation mode of the filter screen plate 41, the user needs to pull out the filter screen plate 41 or use tools to disassemble it. However, in this solution, the filter screen plate 41 can be disassembled by one-key pressing, which is overall fast and convenient.

[0032] The elastic plate 33 is integrally formed with the suction nozzle 3, and the suction nozzle 3 is provided with a trapezoidal groove matched with the elastic plate 33. As shown in Figure 7 In the technical solution, the elastic plate 33 is integrally formed with the suction nozzle 3, which effectively reduces the number of parts and saves the processing and assembly cost. At the same time, the trapezoidal groove is arranged to facilitate the daily pressing of the elastic plate 33.

[0033] As shown in Figure 2 With Figure 3 In the technical solution, the sliding shell 2 includes two shells which are vertically spliced and respectively connected with the movable cavity 14 in a sliding manner. The needle 21 is fixedly arranged on one side of the shell, and the spring 22 is sleeved and arranged outside the needle 21 and respectively fixedly connected with the shell and the cavity wall of the movable cavity 14. By dividing the original sliding shell 2 into two parts and matching the needle 21, the spring 22 and the movable hole 15, two capsules can be vertically placed in a single accommodating cavity 11, and the needle 21 can be controlled to be pierced at the same time, so that the user can inhale through the suction nozzle 3, which can meet the various use requirements of the user.

[0034] The plug-in slot 16 is symmetrically arranged on the main body 1, and the plug-in buckle 35 matched with the plug-in slot 16 is arranged on the suction nozzle 3. As shown in Figure 2 With Figure 8As shown, in the technical scheme, the plug-in slot 16 and the plug-in buckle 35 are arranged, so that the nozzle 3 and the main body 1 are stably buckled during daily use, and the stability of the inhaler during use is improved. The plug-in buckle 35 can be elastically deformed, and the nozzle 3 is conveniently covered.

[0035] In the technical scheme, the front end of the main body 1 is provided with an observation window 17, and a transparent plate is arranged in the observation window 17 to observe the inside of the accommodating cavity 11.

[0036] The outer surface of the nozzle 3 is provided with a plurality of buckle protrusions 36, and the inner cavity of the cover body 5 is provided with a cavity with the same size as the outer contour of the nozzle 3. A groove matched with the buckle protrusion 36 is formed in the cavity wall. Figure 2 With Figure 8 As shown, the cavity with the same size as the outer contour of the nozzle 3 is arranged in the inner cavity of the cover body 5, so that the gap between the cover body 5 and the nozzle 3 after covering is avoided to be too large, and the stability of the inhaler in the non-use state is improved. The buckle protrusion 36 is arranged, so that the cover body 5 is stably buckled on the nozzle 3 after covering, the stability after covering is ensured, and the cover body 5 is not easily separated due to external force.

[0037] An inner groove is formed in the side wall of the movable cavity 14, and a protruding edge is integrally formed on the sliding shell 2 and is in sliding connection with the inner groove. Figure 5 As shown, in the technical scheme, the inner groove and the protruding edge are arranged, so that the sliding shell 2 stably slides along the inner groove under the rebound of the spring 22; at the same time, the sliding shell 2 does not deform during the whole movement process, compared with the elastic component integrally arranged on the sliding shell 2, the stability of the sliding shell 2 during cyclic use is improved, and the overall service life of the inhaler is ensured.

[0038] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, inclusion of an element by use of the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus.

[0039] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A single-dual capsule switchable dry powder inhaler comprising a body and a mouthpiece rotatably connected to the body, characterized in that, The main body is integrally formed with two accommodating cavities and a communication cavity in communication with the accommodating cavities, and a gas port in communication with the communication cavity is arranged on the side wall of the main body; an active cavity is arranged in the concave side wall of the main body, a sliding shell is slidably connected in the active cavity, a needle is fixedly arranged on one side of the sliding shell, a spring is fixedly arranged between the sliding shell and the active cavity, an active hole is arranged in communication between the active cavity and the communication cavity, the active hole is coaxially arranged with the needle and the head of the needle is located in the inner cavity of the active hole; a drug delivery channel in communication with the accommodating cavities is arranged in the middle of the suction nozzle, a filter screen assembly is movably mounted at the lower part of the drug delivery channel, an elastic plate is arranged on the suction nozzle and can be pressed, and the filter screen assembly can be separated from the drug delivery channel by pressing the elastic plate; the suction nozzle is buckled and covered with a cover.

2. The single-double capsule switchable dry powder inhaler according to claim 1, characterized in that: The filter screen assembly comprises a filter screen plate and plug-in blocks symmetrically arranged outside the filter screen plate, a filter screen groove for accommodating the filter screen plate is formed in the lower part of the suction nozzle, limit grooves in cooperation with the plug-in blocks are arranged on the groove walls on both sides of the filter screen groove, a pushing column is fixedly arranged on one side of the elastic plate, the pushing column penetrates through the limit grooves and cooperates with the limit grooves in a clearance, the pushing column pushes a single plug-in block out of the limit groove by pressing the elastic plate, so that the filter screen plate is inclined in the filter screen groove.

3. The single-double capsule switchable dry powder inhaler of claim 2, wherein: The size of the filter screen groove is greater than the external contour size of the filter screen plate, the size of the limit groove is greater than the external contour size of the plug-in block, and a sealing gasket is fixedly arranged along the external contour of the filter screen plate to seal the gap between the filter screen plate and the filter screen groove.

4. The single-double capsule switchable dry powder inhaler of claim 3, wherein: The elastic plate is integrally formed with the suction nozzle, and a trapezoidal groove matched with the elastic plate is arranged on the suction nozzle.

5. The single-double capsule switchable dry powder inhaler according to any one of claims 2-4, characterized in that: The sliding shell comprises two shell bodies, the two shell bodies are connected in series and are slidably connected with the active cavity, the needle is fixedly arranged on one side of the shell body, and the spring is sleeved and arranged outside the needle and is fixedly connected with the shell body and the cavity wall of the active cavity.

6. The single-double capsule switchable dry powder inhaler according to any one of claims 2-4, characterized in that: The main body is symmetrically arranged with plug-in slots, and the suction nozzle is arranged with plug-in buckles matched with the plug-in slots.

7. The mono-dual capsule switchable dry powder inhaler according to claim 6, characterized in that: An observation window is arranged on the front end face of the main body, and a transparent plate is arranged in the observation window to observe the internal condition of the accommodating cavity.

8. The single-double capsule switchable dry powder inhaler of claim 6, wherein: A plurality of buckle protrusions are arranged on the outer surface of the suction nozzle, a cavity with the same external contour size as the suction nozzle is arranged in the inner cavity of the cover, and grooves matched with the buckle protrusions are formed in the cavity wall of the cavity.

9. The single-double capsule switchable dry powder inhaler of claim 8, wherein: An inner groove is formed in the side wall of the active cavity, and a protruding rim is integrally formed on the sliding shell and is slidably connected with the inner groove.

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