Air inlet baffle, dose protection plate, air suction triggering mechanism and powder inhaler

Abstract

The invention discloses an air inlet baffle, a dose protection plate, an inspiration trigger mechanism and a powder inhaler. The air inlet baffle is used for the powder inhaler and comprises a baffle body, a boss is arranged on the first surface of the baffle body, and the peripheral side face of the boss and the peripheral side face of the baffle body are arranged at intervals. Through the arrangement, the problems that in the prior art, a powder inhaler is poor in powder depolymerization effect and powder is prone to being wasted can be solved, the powder depolymerization effect can be improved, and the powder utilization rate is increased.

Description

Technical Field

[0001] This application relates to the technical field of inhalation devices, and particularly to an air intake baffle, a dose protection plate, an inhalation trigger mechanism, and a powder inhaler. Background Art

[0002] A powder inhaler generally includes a housing assembly and various functional mechanisms, and distributes a powdered pharmaceutical preparation by means of airflow inhalation, so as to inhale the powder from a powder metering component into a mouthpiece for a user to inhale.

[0003] However, for existing powder inhalers, it is impossible to ensure the protection of powders such as medicinal powders under the condition of low-speed airflow inhalation. During the user's suction process, the effect of airflow on the depolymerization of powders is not good, resulting in low powder utilization rate and easy powder waste. Summary of the Invention

[0004] This application mainly provides an air intake baffle, a dose protection plate, an inhalation trigger mechanism, and a powder inhaler to solve the problems of poor depolymerization effect of powders and easy powder waste in existing powder inhalers.

[0005] To solve the above technical problems, a technical solution adopted in this application is: providing an air intake baffle for a powder inhaler, including:

[0006] A baffle body;

[0007] Wherein, a boss is provided on a first surface of the baffle body, and an outer peripheral side surface of the boss is spaced apart from an outer peripheral side surface of the baffle body.

[0008] Wherein, the boss covers a central area of the first surface of the baffle body.

[0009] Wherein, along the circumferential direction of the boss, the outer peripheral side surface of the boss is evenly spaced from the outer peripheral side surface of the baffle body; a portion of the first surface of the baffle body not covered by the boss forms an annular surface.

[0010] Wherein, the air intake baffle further includes a rotating shaft provided at a first end of the baffle body;

[0011] Along the direction from the first end of the baffle body to the opposite second end, the height of the boss gradually decreases, so that the top surface of the boss forms an inclined surface.

[0012] Wherein, the boss is formed by the baffle body being recessed.

[0013] Wherein, the air intake baffle further includes a rotating shaft and a rotating member; the rotating shaft is provided at one end of the baffle body; the rotating member is connected to a free end of the rotating shaft and is spaced apart from the baffle body;

[0014] Wherein, the first end of the rotating member has a curved surface.

[0015] Wherein, the second end of the rotating member has a protruding cylinder away from the surface of the baffle body.

[0016] Wherein, the number of the rotating shafts is two, which are respectively arranged on opposite sides of the baffle body, defined as the first rotating shaft and the second rotating shaft; the number of the rotating members is two, defined as the first rotating member and the second rotating member;

[0017] The first rotating member is connected to the free end of the first rotating shaft. The first end of the first rotating member has a first curved surface, and the second end of the first rotating member has the protruding cylinder away from the surface of the baffle body;

[0018] The second rotating member is connected to the free end of the second rotating shaft. The first end of the second rotating member has a second curved surface, and the second end of the second rotating member has an arc groove surface.

[0019] Wherein, the number of the rotating shafts is two, which are respectively arranged on opposite sides of the baffle body; one end of each rotating shaft is connected to the side surface of the baffle body;

[0020] The side surface of the baffle body further has a shoulder surrounding the rotating shaft, and the shoulder is arranged at an interval from the rotating member.

[0021] To solve the above technical problems, another technical solution adopted by the present application is: to provide a dose protection plate for a powder inhaler, including:

[0022] An annular body;

[0023] A shielding portion, connected to one end of the annular body, for shielding or not shielding the dose cup of the powder inhaler.

[0024] Wherein, the dose protection plate further includes a pressing member, and the pressing member is arranged on the outer side surface of the annular body; the surface of the pressing member away from the annular body includes a pressing arc surface.

[0025] Wherein, the pressing member includes a cylindrical convex surface, and the cylindrical convex surface is arranged on one side of the pressing arc surface.

[0026] Wherein, the dose protection plate further includes a spring arm claw, and one end of the spring arm claw is connected to the annular body.

[0027] Wherein, the dose protection plate further includes a wedge-shaped column, and one end of the wedge-shaped column is connected to the annular body.

[0028] To solve the above technical problems, another technical solution adopted by the present application is: to provide an inhalation triggering mechanism, including:

[0029] Any of the air intake baffles as described above; and / or

[0030] Any dose protection plate as described above.

[0031] In order to solve the above technical problems, another technical solution adopted by the present application is to provide a powder inhaler, comprising:

[0032] A powder delivery mechanism, comprising a powder container and a powder metering wheel; the powder container has a storage chamber, an inhalation channel and an air flow channel; the inhalation channel is communicated with the air flow channel; the storage chamber is used to store powder, and the storage chamber has a powder outlet; the powder metering wheel is rotatably connected to the powder container; the powder metering wheel comprises a dosage cup; the dosage cup is used to receive the powder from the powder outlet and deliver the powder to the inlet of the inhalation channel;

[0033] The inhalation trigger mechanism as described above; wherein the air intake baffle is rotatably connected to the side wall of the air flow channel, and the first surface of the baffle body faces the outside of the port of the air flow channel; the dose protection plate is rotatably connected to the powder container; the air intake baffle is linked to the dose protection plate;

[0034] Wherein, when the air inhalation trigger mechanism is in the initial state, the air inlet baffle blocks the air flow channel, and the inhalation channel is not connected to the outside atmosphere; the shielding portion shields the powder outlet of the dosage cup located at the entrance of the inhalation channel;

[0035] When the negative pressure inside the suction channel is greater than a threshold value, the air intake baffle rotates to open the airflow channel and triggers the dose protection plate to rotate, so that the shielding portion deviates and does not block the powder outlet of the dose cup, and the airflow channel connects the outside atmosphere and the suction channel.

[0036] Wherein, the powder inhaler further comprises:

[0037] A housing assembly, comprising a front housing, the front housing having a suction nozzle, the suction nozzle being arranged corresponding to the suction channel and being connected to the suction channel; a side wall of the front housing having an air inlet and a grille, the grille protruding from an outer wall surface of the front housing; an inner wall surface of the front housing having an annular flange surrounding the air inlet, one end of the annular flange being arranged in the air flow channel, and the side wall of the front housing blocking a port of the air flow channel;

[0038] The intake baffle has the annular surface; when the suction trigger mechanism is in the initial state, the boss is embedded in the annular flange, the inner peripheral side surface of the annular flange and the outer peripheral side surface of the boss are spaced apart and cooperate to form a first flow channel section, the end surface of the annular flange away from the front housing abuts against the annular surface and cooperates to form a second flow channel section, and the first flow channel section and the second flow channel section form an L-shaped intake air flow channel; the pressing arc surface and the arc groove surface of the intake baffle cooperate to achieve concentric arc surface pressing;

[0039] When the negative pressure inside the suction channel is greater than the threshold value, the intake baffle rotates to open the air flow channel, and the air flow channel communicates with the outside atmosphere through the air inlet.

[0040] Wherein, the ratio of the distance between the top surface of the boss and the first surface of the baffle body to the thickness of the annular flange is 1:2 - 7:1.

[0041] Wherein, at least two air inlets and at least one grille are provided on the side wall of the front housing, and the grille and the air inlets are arranged alternately; the annular flange surrounds the air inlets and the grille;

[0042] The side wall of the air flow channel is connected to the side wall of the storage cavity, and the side wall of the air flow channel connected to the side wall of the storage cavity is provided with spaced first diversion holes and second diversion holes; the end of the suction channel close to the nozzle has spaced first air inlets and second air inlets, the first diversion hole communicates the air flow channel and the first air inlet, and the second diversion hole communicates the air flow channel and the second air inlet;

[0043] The inner wall surface of the front housing and the outer wall surface of the suction channel are spaced apart to form a diversion channel, and the diversion channel communicates the air flow channel with the first air inlet and the second air inlet.

[0044] Wherein, the powder inhaler further includes:

[0045] An outer cover, rotatably connected to the housing assembly and capable of rotating back and forth between a first position and a second position; when the outer cover is configured to be in the first position, the outer cover shields the nozzle and the air inlet; when the outer cover is configured to be in the second position, the nozzle and the air inlet are exposed;

[0046] A gas pressing mechanism, arranged on the powder container, for pressing the powder in the powder container into the dose cup;

[0047] Wherein, the powder metering wheel can rotate back and forth between a third position and a fourth position; when the powder metering wheel is configured at the third position, the dose cup is correspondingly arranged with the powder outlet of the storage cavity; when the powder metering wheel is configured at the fourth position, the dose cup is correspondingly arranged with the inlet of the inhalation channel.

[0048] The outer cover is linked and cooperated with the powder delivery mechanism and the air pressure mechanism respectively; during the process of the outer cover rotating from the first position to the second position, it first drives the air pressure mechanism to press the powder in the storage cavity into the dose cup, and then drives the powder metering wheel to rotate from the third position to the fourth position.

[0049] During the process of the outer cover reversely resetting from the second position to the first position, it drives the powder metering wheel, the dose protection plate and the air pressure mechanism to reset respectively, and triggers the intake baffle to reversely reset.

[0050] The beneficial effect of this application is: different from the prior art, this application discloses an intake baffle, a dose protection plate, an inhalation trigger mechanism, and a powder inhaler. The intake baffle is used for a powder inhaler, the powder inhaler includes a powder container, the powder container includes an inhalation channel and an air flow channel communicated with the inhalation channel, and the intake baffle includes: a baffle body for rotatably connecting with the air flow channel; the surface of the baffle body facing outside the port of the air flow channel has a convex platform, and the convex platform is used to increase the complexity of the side flow channel. Through the above settings, the problems of poor powder deflocculation effect and easy powder waste in the prior art powder inhaler can be solved, which is beneficial to improving the powder deflocculation effect and powder utilization rate. Description of the Drawings

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings, where:

[0052] Figure 1 is a schematic structural diagram of the powder inhaler provided by an embodiment of the present application in the state of not opening the cover;

[0053] Figure 2 is Figure 1 a schematic structural diagram of the powder inhaler provided in the state of opening the cover;

[0054] Figure 3 is Figure 1 a schematic structural diagram of the powder inhaler provided in another state of opening the cover;

[0055] Figure 4 is Figure 3 The structural schematic diagram of the provided powder inhaler at another angle;

[0056] Figure 5A is Figure 1 The structural schematic diagram of the outer cover of the provided powder inhaler at an angle;

[0057] Figure 5B is Figure 5A The structural schematic diagram of the provided outer cover at another angle;

[0058] Figure 6A is Figure 1 The structural schematic diagram of the provided powder inhaler without the outer cover at an angle;

[0059] Figure 6B is Figure 1 The structural schematic diagram of the provided powder inhaler without the outer cover at another angle;

[0060] Figure 7A is Figure 2 The structural schematic diagram of the provided powder inhaler at another angle;

[0061] Figure 7B is Figure 7A The partial enlarged schematic diagram of the provided powder inhaler;

[0062] Figure 8A is Figure 1 The structural schematic diagram of the provided powder inhaler without the outer cover;

[0063] Figure 8B is Figure 8A The partial enlarged schematic diagram of the provided powder inhaler;

[0064] Figure 9A is Figure 1 The cross-sectional schematic diagram of the provided powder inhaler without the outer cover in a state;

[0065] Figure 9B is Figure 1 The cross-sectional schematic diagram of the provided powder inhaler without the outer cover in another state;

[0066] Figure 9C is Figure 1 The cross-sectional schematic diagram of the provided powder inhaler without the outer cover in another angle in a state;

[0067] Figure 9D is Figure 1 The cross-sectional schematic diagram of the provided powder inhaler without the outer cover in another angle in another state;

[0068] Figure 9E is Figure 9C a partial enlarged schematic view of region A of

[0069] Figure 9F is Figure 9D a partial enlarged schematic view of region A of

[0070] Figure 9G is Figure 9C a partial enlarged schematic view of region B of

[0071] Figure 9H is Figure 9C a schematic structural view of the L-shaped air inlet passage of the powder inhaler provided by

[0072] Figure 10A is Figure 1 a schematic structural view of the drive cam of the powder inhaler provided by at an angle

[0073] Figure 10B is Figure 10A a schematic structural view of the drive cam provided by at another angle

[0074] Figure 10C is a schematic structural view of the drive cam provided by 10A at yet another angle,

[0075] Figure 11 is Figure 1 a schematic structural view of the airbag pressing member of the powder inhaler provided by

[0076] Figure 12A is Figure 1 a schematic structural view of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided by when it is in the third position in the powder container;

[0077] Figure 12B is Figure 1 a schematic structural view of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided by when it is in the fourth position in the powder container;

[0078] Figure 13A is Figure 1 a schematic structural view of the powder container of the powder inhaler provided by at an angle;

[0079] Figure 13B is Figure 13A a schematic structural view of the powder container provided by at another angle;

[0080] Figure 14A is Figure 1 a schematic structural view of the powder metering wheel of the powder inhaler provided by at an angle;

[0081] Figure 14BIt is a schematic structural view of the powder metering wheel provided by 14A from another angle;

[0082] Figure 15A It is Figure 1 A schematic structural view of the inhalation trigger device of the powder inhaler provided when it is in a certain state on the powder container;

[0083] Figure 15B It is Figure 15A A schematic structural view of the inhalation trigger device provided when it is in another state on the powder container;

[0084] Figure 16A It is Figure 15A A schematic structural view of the inhalation trigger device provided after removing the powder container;

[0085] Figure 16B It is Figure 15B A schematic structural view of the inhalation trigger device provided after removing the powder container;

[0086] Figure 17A It is Figure 16A A schematic structural view of the inhalation trigger device provided from another angle;

[0087] Figure 17B It is Figure 16B A schematic structural view of the inhalation trigger device provided from another angle;

[0088] Figure 18A It is Figure 1 A schematic exploded view of the counting mechanism of the powder inhaler provided;

[0089] Figure 18B It is Figure 18A A schematic assembled view of the counting mechanism provided;

[0090] Figure 19A It is Figure 18A A schematic structural view of the counter base of the counting mechanism provided from a certain angle;

[0091] Figure 19B It is Figure 19A A schematic structural view of the counter base provided from another angle;

[0092] Figure 20 It is Figure 1 A schematic structural view of the dose protection plate of the inhalation trigger device of the powder inhaler provided;

[0093] Figure 21A It is Figure 1 A schematic assembled cross-sectional view of the powder metering wheel and the dose protection plate of the powder inhaler provided when in a certain state;

[0094] Figure 21B It isFigure 1 Schematic diagram of the assembly cross-section of the powder metering wheel and the dose protection plate of the provided powder inhaler in another state;

[0095] Figure 21C is Figure 21A Partial enlarged schematic diagram of;

[0096] Figure 21D is Figure 21B Partial enlarged schematic diagram of;

[0097] Figure 21E is Figure 1 Schematic diagram of the assembly cross-section of the powder metering wheel and the dose protection plate of the provided powder inhaler in yet another state;

[0098] Figure 21F is Figure 21E Partial enlarged schematic diagram of;

[0099] Figure 22A is Figure 1 Schematic diagram of the air inlet baffle of the inhalation trigger device of the provided powder inhaler at an angle;

[0100] Figure 22B is Figure 21A Schematic diagram of the air inlet baffle of the provided powder inhaler at another angle;

[0101] Figure 22C is Figure 22A Schematic diagram of the air inlet baffle of the provided powder inhaler at yet another angle;

[0102] Figure 23A is Figure 1 Schematic diagram of the front housing of the provided powder inhaler at an angle;

[0103] Figure 23B is Figure 1 Schematic diagram of the front housing of the provided powder inhaler at another angle;

[0104] Figure 24A is Figure 18A Schematic diagram of the units digit wheel of the provided counting mechanism at an angle;

[0105] Figure 24B is Figure 24A Schematic diagram of the units digit wheel of the provided powder inhaler at another angle;

[0106] Figure 25 is Figure 18A Schematic diagram of the tens digit wheel of the provided counting mechanism;

[0107] Figure 26 Schematic cross-sectional view of another embodiment of the powder inhaler provided by the present application;

[0108] Figure 27 It is a schematic cross-sectional view of another embodiment of the powder inhaler provided by the present application;

[0109] Figure 28 is Figure 1 A cyclic schematic diagram of the process of opening the switch cover of the powder inhaler provided;

[0110] Figure 29A is Figure 1 A schematic curve diagram of the opening angle and torque of one embodiment of the process of opening the cover of the powder inhaler provided;

[0111] Figure 29B is Figure 1 A schematic curve diagram of the closing angle and torque of one embodiment of the process of closing the cover of the powder inhaler provided;

[0112] Figure 30A is Figure 1 A schematic curve diagram of the opening angle and torque of another embodiment of the process of opening the cover of the powder inhaler provided;

[0113] Figure 30B is Figure 1 A schematic curve diagram of the closing angle and torque of another embodiment of the process of closing the cover of the powder inhaler provided;

[0114] Figure 31A is Figure 1 A schematic bottom view structure diagram of the powder inhaler provided at an angle;

[0115] Figure 31B is Figure 31A A schematic diagram of the powder inhaler provided in a state of being placed on a horizontal plane;

[0116] Figure 31C is Figure 31A A schematic diagram of the powder inhaler provided in a handheld state;

[0117] Figure 31D is Figure 31A A schematic diagram of the powder inhaler provided after opening the cover in a handheld state;

[0118] Figure 31E is Figure 31A A schematic diagram of the powder inhaler provided in an oral inhalation state. Specific embodiments

[0119] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, 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 shall fall within the protection scope of the present application.

[0120] The terms "first", "second", and "third" in the embodiments of the present application are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes unlisted steps or units, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0121] Referring to

[0122] Referring to Figures 1 to 11 , Figure 1 FIG. Figure 2 is a schematic structural diagram of a powder inhaler provided by an embodiment of the present application in an unopened state, Figure 1 FIG. Figure 3 is Figure 1 a schematic structural diagram of the powder inhaler provided by Figure 4 is Figure 3 a schematic structural diagram of the powder inhaler provided by Figure 5A is Figure 1 a schematic structural diagram of the powder inhaler provided by Figure 5B is Figure 5A a schematic structural diagram of the outer cover of the powder inhaler provided by Figure 6A is Figure 1 a schematic structural diagram of the powder inhaler provided by Figure 6B isFigure 1 Schematic structural view of the provided powder inhaler from another angle after removing the outer cover, Figure 7A is Figure 2 Schematic structural view of the provided powder inhaler from another angle, Figure 7B is Figure 7A Partial enlarged schematic view of the provided powder inhaler, Figure 8A is Figure 1 Schematic structural view of the provided powder inhaler after removing the outer cover, Figure 8B is Figure 8A Partial enlarged schematic view of the provided powder inhaler, Figure 9A is Figure 1 Cross-sectional schematic view of the provided powder inhaler in a state after removing the outer cover, Figure 9B is Figure 1 Cross-sectional schematic view of the provided powder inhaler in another state after removing the outer cover, Figure 9C is Figure 1 Cross-sectional schematic view of the provided powder inhaler from another angle in a state after removing the outer cover, Figure 9D is Figure 1 Cross-sectional schematic view of the provided powder inhaler from another angle in another state after removing the outer cover, Figure 9E is Figure 9C Partial enlarged schematic view of region A of Figure 9F is Figure 9D Partial enlarged schematic view of region A of Figure 9G is Figure 9C Partial enlarged schematic view of region B of Figure 9H is Figure 1 Schematic structural view of the L-shaped air inlet channel of the provided powder inhaler, Figure 10A is Figure 1 Schematic structural view of the driving cam of the provided powder inhaler from an angle, Figure 10B is Figure 10A Schematic structural view of the provided driving cam from another angle, Figure 10C is Schematic structural view of the provided driving cam from yet another angle by 10A, Figure 11 is Figure 1 Schematic structural view of the airbag pressing part of the provided powder inhaler.

[0123] See Figures 1 to 4 , the present application provides a powder inhaler, which includes a housing assembly (not labeled in the figure), a functional mechanism ( Figures 1 - 4not shown) and the outer cover 4; wherein, the functional mechanism is disposed within the housing assembly, the outer cover 4 is connected to the housing assembly, and is capable of being limited to rotate back and forth between a first position and a second position. When the outer cover 4 is in the first position, the outer cover 4 is in a closed state; when the outer cover 4 is in the second position, the outer cover 4 is in an open position in place. Wherein, the outer cover 4 is in linkage cooperation with the functional mechanism, and through the back-and-forth rotation of the outer cover 4 between the first position and the second position, the linkage actions of the respective functional mechanisms are realized, so that the powder inhaler realizes the powder distribution function such as medicinal powder. The back-and-forth rotation in the present application means to go back and forth along a repeated path, and the directions of the two rotations are opposite. For example, rotate clockwise from the first position to the second position, and then rotate counterclockwise back to the first position from the second position.

[0124] Specifically, the housing assembly includes a front housing 1, a rear housing 2, and an upper housing 3. Wherein, the front housing 1, the rear housing 2, and the upper housing 3 are connected and cooperated with each other to form a receiving space, the functional mechanism is disposed within the receiving space, and the outer cover 4 is rotatably connected to the bottom end of the housing assembly, so as to be able to rotate back and forth between a first position and a second position, realizing the opening process and the closing process. The rotation connection mode between the outer cover 4 and the bottom end of the housing assembly can be rotation connection through a rotating shaft, or can be rotation connection through an arc-shaped slide rail. The shapes and structures of the front housing 1, the rear housing 2, the upper housing 3, and the outer cover 4 are not limited, and the materials can be metal or plastic, etc.

[0125] See Figure 1 , Figures 5A to 9B , the outer cover 4 includes two connecting portions 406 oppositely arranged in a first direction. The two connecting portions 406 are respectively rotatably connected to opposite sides of the bottom end of the housing assembly and protrude from the bottom end of the housing assembly. Specifically, the two connecting portions 406 of the outer cover 4 are assembled and connected to the housing assembly by the cooperation of a rotating shaft and a hole. See Figure 5A , Figure 5B , Figure 6A and Figure 8A and Figure 8B , Figure 9A and Figure 9B , the powder inhaler further includes a driving gear 5. The driving gear 5 is disposed within the housing assembly. A driving shaft 501 is disposed on one end surface of the driving gear 5. A first shaft hole 401 and a driving hole 402 are disposed on one of the connecting portions 406 of the outer cover 4. A second shaft hole 404 is disposed on the other connecting portion 406 of the outer cover 4. Cylinders 105 are respectively disposed on the front housing 1 corresponding to the first shaft hole 401 and the second shaft hole 404. The cylinders 105 are defined as first cylinders. The first shaft hole 401 and the second shaft hole 404 of the outer cover 4 are matched with the corresponding cylinders 105 of the front housing 1. The driving hole 402 of the outer cover 4 is matched with the driving shaft 501 of the driving gear 5, so that the outer cover 4 is rotatably connected to the bottom end of the housing assembly.

[0126] Such as Figure 6BAs shown, the powder inhaler further includes a sealing ring 6 disposed between the connecting portion 406 of the outer cover 4 and the driving gear 5 for sealing, so as to ensure the consistency of the airway and the suction resistance of the powder inhaler, and prevent gas from entering the housing assembly between the driving gear 5 and the connecting portion 406 of the outer cover 4.

[0127] See Figure 5A 、 Figure 6A and Figure 7A and Figure 7B As shown in, an arc-shaped rib 405 is further provided on one of the connecting portions 406 of the outer cover 4, and a sound-producing elastic arm 108 is provided on the front housing 1. The arc-shaped rib 405 on the outer cover 4 is used to cooperate with the sound-producing elastic arm 108 on the front housing 1 to realize a sound prompt when the outer cover 4 is opened in place. Specifically, during the opening process of the outer cover 4, that is, during the process of the outer cover 4 rotating from the first position to the second position, the sound-producing elastic arm 108 is located outside the arc-shaped rib 405, and the sound-producing elastic arm 108 moves along the outer circumference of the arc-shaped rib 405. After the outer cover 4 is opened in place, that is, when it rotates to the second position, the sound-producing elastic arm 108 cooperates with the arc-shaped rib 405 to realize a sound prompt when the outer cover 4 is opened in place. During the closing process of the outer cover 4, that is, during the process of the outer cover 4 rotating from the second position back to the first position, the outer cover 4 is located inside the arc-shaped rib 405, and the outer cover 4 moves along the inner circumference of the arc-shaped rib 405. After the outer cover 4 is closed in place, that is, when it rotates to the first position, the sound-producing elastic arm 108 cooperates with the arc-shaped rib 405 to realize a sound prompt when the outer cover 4 is closed in place. For example, in a preferred embodiment, the angle of the outer cover 4 in the first position is defined as 0 degrees, and the angle of the outer cover 4 in the second position relative to the first position is 150 degrees; during the opening process of the outer cover 4, when the outer cover 4 rotates from 0 degrees to 150 degrees, that is, when the rotation angle of the outer cover 4 is 150 degrees, the arc-shaped rib 405 of the outer cover 4 contacts the sound-producing elastic arm 108 of the front housing 1 to realize the function of a sound prompt when the outer cover 4 is opened in place. The angle of the outer cover 4 in the second position is not limited to 150 degrees and can be designed according to needs. For example, it can be greater than or equal to 120 degrees and less than or equal to 180 degrees, as long as the outlet 102 of the mouthpiece 101 can be exposed when the outer cover 4 is in the second position.

[0128] See Figure 6A and Figures 12A to 13B As shown in and, the powder inhaler has an inhalation channel 706 and a mouthpiece 101. The mouthpiece 101 is communicated with the inhalation channel 706 to facilitate the user to inhale the medicinal powder from the outlet 102 position of the mouthpiece 101. Specifically, the housing assembly includes a mouthpiece 101. The mouthpiece 101 is provided on the front housing 1 and sleeved on the inhalation channel 706. When the outer cover 4 is configured in the first position, the outer cover 4 blocks the outlet 102 of the mouthpiece 101. When the outer cover 4 is configured in the second position, the outlet 102 of the mouthpiece 101 is exposed.

[0129] Specifically, as shown in Figure 5AAs shown, two drive holes 402 are provided on the connecting portion 406 of the outer cover 4. The two drive holes 402 are respectively arranged on both sides of the first shaft hole 401. Two drive shafts 501 are provided on one end face of the drive gear 5. The two drive shafts 501 are respectively arranged on both sides of the cylinder 105 of the front housing 1. The two drive holes 402 are in one-to-one correspondence and mating connection with the two drive shafts 501. In other embodiments, the drive holes 402 and the drive shafts 501 can also be correspondingly arranged in other numbers such as one or three. It can be understood that the connection between the outer cover 4 and the drive gear 5 is not limited to the above manner, and they can also be integrally formed, glued or welded, as long as the rotation of the outer cover 4 can drive the drive gear 5 to rotate.

[0130] As Figure 9A shown, the powder inhaler further includes an intermediate gear 13. The intermediate gear 13 is arranged inside the housing assembly, and the intermediate gear 13 meshes with the drive gear 5. Through the mating connection between the outer cover 4 and the drive gear 5, the linkage of the outer cover 4 driving the drive gear 5 and the functional mechanism is realized. Specifically, the outer cover 4 rotates around the cylinder 105 of the front housing 1. The drive holes 402 of the outer cover 4 drive the drive gear 5 to rotate synchronously, and then drive the linkage of each functional mechanism through the intermediate gear 13.

[0131] The functional mechanism includes a gas compression mechanism, a powder delivery mechanism, an inhalation trigger mechanism, a counting mechanism, etc. Through the rotation during the opening process of the outer cover 4, it drives the gas compression mechanism to realize the gas compression function respectively, and drives the powder delivery mechanism to realize the powder delivery function after the gas compression is completed, so as to deliver powders such as medicinal powders to the position of the inhalation channel 706 of the powder inhaler, and realizes the inhalation trigger function through the inhalation trigger mechanism, so as to facilitate the user to inhale the medicinal powder. Further, when the outer cover 4 is closed, it drives the gas compression mechanism, the powder delivery mechanism and the inhalation trigger mechanism to reset, and drives the counting mechanism to count.

[0132] The following introduces each functional mechanism.

[0133] (1) Gas compression mechanism

[0134] Referring Figures 12A to 14B , Figure 12A is Figure 1 the structural schematic diagram of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided, when the powder metering wheel is in the third position in the powder container. Figure 12B is Figure 1 the structural schematic diagram of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided, when the powder metering wheel is in the fourth position in the powder container. Figure 13A is Figure 1 the structural schematic diagram of the powder container of the powder inhaler provided at an angle. Figure 13B is Figure 13A the structural schematic diagram of the powder container of the powder inhaler provided at another angle. Figure 14A is Figure 1Schematic structural diagram of the powder metering wheel of the provided powder inhaler at an angle Figure 14B is the schematic structural diagram of the powder metering wheel provided by 14A at another angle.

[0135] See Figures 5A to 14B , specifically, the air compression mechanism includes an airbag pressing member 17, an air compression airbag 18, an elastic member 19, and a driving cam 12. To facilitate the understanding of the function of the air compression mechanism, the powder delivery mechanism is introduced here. The powder delivery mechanism includes a powder container 7 and a powder metering wheel 9. The powder metering wheel 9 has a dose cup 902. The powder container 7 has a storage cavity 715 for storing powder. One end of the elastic member 19 acts on the airbag pressing member 17. The airbag pressing member 17 is used to squeeze the air compression airbag 18 under the drive of the elastic member 19, so that the air compression airbag 18 is compressed to achieve the air compression function; the airbag pressing member 17 is also used to squeeze the elastic member 19 under the action of the driving cam 12 and drive the air compression airbag 18 to stretch.

[0136] See Figures 12A to 13B , specifically, the first end of the storage cavity 715 has a powder outlet 713, and the second end has an air compression port 714. The air compression airbag 18 is arranged at the second end of the storage cavity 715 and communicates with the air compression port 714. Specifically, the outer side surface of the second end of the storage cavity 715 has an annular rib 701. One end of the air compression airbag 18 close to the powder container 7 is engaged with the annular rib 701 of the powder container 7 to realize the connection between the air compression airbag 18 and the powder container 7. The airbag pressing member 17 is movably sleeved outside the air compression airbag 18 and the storage cavity 715. The elastic member 19 can be an elastic structural member such as a spring. The airbag pressing member 17 is used to squeeze the air compression airbag 18 under the drive of the elastic member 19. Among them, the airbag pressing member 17 can move back and forth between the fifth position and the sixth position to compress air into the storage cavity 715 to achieve the air compression function, facilitating the extrusion of the powder in the storage cavity 715 from the powder outlet 713 into the dose cup 902 of the powder metering wheel 9.

[0137] As Figure 9A , Figure 9B , Figure 11 , Figure 13A and Figure 13B shown, the top wall of the airbag pressing member 17 has a fixing hole 1701 for connecting the top of the air compression airbag 18. For example, the top of the air compression airbag 18 can pass through the fixing hole 1701, and a part of the air compression airbag 18 is limited outside the top wall of the airbag pressing member 17, and another part is limited on the side of the top wall of the airbag pressing member 17 close to the air compression port 714, so as to drive the air compression airbag 18 to expand and contract in cooperation with the movement of the airbag pressing member 17 and the elastic member 19. Driving the air compression airbag 18 to expand and contract through the airbag pressing member 17 can improve the air compression efficiency of the air compression airbag 18 and prevent the air compression airbag 18 from malfunctioning due to the inability to reset the air.

[0138] The powder inhaler further includes a driving cam 12 which is arranged inside the housing assembly. Specifically, referring to Figure 9A , the powder inhaler further includes a gear bracket 14 which is arranged inside the housing assembly. The driving cam 12 is assembled on the gear bracket 14. One end of the gear bracket 14 is assembled and connected with the powder metering wheel 9, and the other end is assembled and connected with the driving cam 12. The outer cover 4 drives the driving gear 5 to move in linkage. The driving gear 5 meshes with the intermediate gear 13, and the intermediate gear 13 meshes with the driving cam 12, so as to realize the same-direction rotation of the driving cam 12 and the driving gear 5. It can be understood that the driving gear 5 and / or the intermediate gear 13 can also be omitted in this application, as long as the rotation of the outer cover 4 can drive the cam 12 to rotate. The driving cam 12 and the elastic member 19 are used to drive the airbag pressing member 17 to move back and forth between the fifth position and the sixth position, so as to drive the airbag 18 to expand and contract, so as to realize the functions of air compression and reset. Specifically, the elastic member 19 is arranged on one side of the top wall of the airbag pressing member 17. One end of the elastic member 19 abuts against the top wall of the airbag pressing member 17, and the other end abuts against the top wall of the upper housing 3 to drive the airbag pressing member 17 to move. The driving cam 12 rotates to give way to the airbag pressing member 17, and the elastic member 19 drives the airbag pressing member 17 to move from the fifth position to the sixth position. The driving cam 12 presses the airbag pressing member 17, and the airbag pressing member 17 moves back to the fifth position from the sixth position and presses the elastic member 19.

[0139] Referring to Figures 10A to 11 , one end of the side wall of the airbag pressing member 17 far away from the top wall has a convex rod 1704, and one end of the convex rod 1704 far away from the top wall of the airbag pressing member 17 has an arc surface 1703. The driving cam 12 has a cam curved surface 1202. The arc surface 1703 is used to cooperate with the cam curved surface 1202 of the driving cam 12 to realize the back-and-forth movement of the airbag pressing member 17 between the fifth position and the sixth position. Specifically, when the airbag pressing member 17 is in the fifth position, the arc surface 1703 of the convex rod 1704 of the airbag pressing member 17 abuts against the side surface of the driving cam 12, and the arc surface 1703 of the airbag pressing member 17 is limited in the arc-shaped groove 1201 of the driving cam 12. At this time, the top wall of the airbag pressing member 17 compresses the elastic member 19 to make it in a compressed state, and the top wall of the airbag pressing member 17 stretches the airbag 18 to make it in an extended state. During the opening process of the outer cover 4, the driving cam 12 is driven to rotate, the elastic member 19 continuously stretches, and the elastic force of the elastic member 19 drives the airbag pressing member 17 to move vertically downward, that is, the elastic member 19 drives the airbag pressing member 17 to move from the fifth position to the sixth position. The arc surface 1703 of the airbag pressing member 17 moves along the cam curved surface 1202 of the driving cam 12. The downward movement of the airbag pressing member 17 compresses the airbag 18 and presses air into the storage cavity 715.

[0140] In one embodiment, the tooth number ratio between the drive gear 5 and the drive cam 12 is 18:15. That is, when the outer cover 4 is opened by 150°, the drive gear 5 rotates synchronously by 150°. At this time, the rotation angle of the drive cam 12 is 180°. It can be understood that setting the tooth number ratio between the drive gear 5 and the drive cam 12 to 18:15 can reduce the volume of the drive gear 5 and save space. In other embodiments, the powder inhaler may not be provided with the drive gear 5 and the intermediate gear 13, and the outer cover 4 is directly linked with the drive cam 12. The rotation of the outer cover 4 drives the rotation of the drive cam 12, so as to realize the linkage of the functional mechanism.

[0141] Specifically, as Figures 9A to 11 shown, the drive cam 12 includes a body portion 1200 and a gear 1203. The gear 1203 is coaxially connected to the body portion 1200 and is used to drive the rotation of the body portion 1200. The gear 1203 meshes with the intermediate gear 13. Among them, one surface of the body portion 1200 has a guide groove 1209. The side surface of the guide groove 1209 is a cam surface 1202. The cam surface 1202 cooperates with the arc surface 1703 of the airbag pressing member 17 to realize the reciprocating movement of the airbag pressing member 17 between the fifth position and the sixth position. Specifically, the drive cam 12 has a central hole 1204, which is defined as the first central hole. The gear 1203 is arranged on one surface of the body portion 1200 and surrounds the central hole 1204. The central hole 1204 penetrates through the body portion 1200 and the gear 1203. The central hole 1204 of the drive cam 12 is sleeved on the gear bracket 14 of the powder inhaler. The guide groove 1209 is located on the surface of the body portion 1200 facing the gear 1203, and the guide groove 1209 is arranged at an interval from the gear 1203. The airbag pressing member 17 moves up and down along the longitudinal direction between the fifth position and the sixth position. In this application, the cam surface 1202 of the drive cam 12 directly abuts against the convex rod 1704 of the airbag pressing member 17, which simplifies the structure of the air pressure mechanism and improves the stability of the operation of the air pressure mechanism. In one embodiment, the air pressure mechanism only includes four independent components: the airbag pressing member 17, the air pressure airbag 18, the elastic member 19 and the drive cam 12, so that the structure of the air pressure mechanism is simple.

[0142] In some embodiments, the end of the convex rod 1704 of the airbag pressing member 17 away from the top wall has a tip, and the end surface of the tip is an arc surface 1703. The outer peripheral side surface of the body portion 1200 of the drive cam 12 has an arc-shaped groove 1201. When the airbag pressing member 17 is configured at the fifth position, the tip of the convex rod 1704 is embedded in the arc-shaped groove 1201 of the body portion 1200 to realize the initial positioning and preliminary limiting of the airbag pressing member 17.

[0143] In a specific embodiment, the arc-shaped groove 1201 is a circular arc-shaped groove, the bottom surface of the arc-shaped groove 1201 is circular arc-shaped, and the arc surface 1703 of the convex rod 1704 is a circular arc surface. It can be understood that the arc-shaped groove 1201 is provided on the cam surface 1202 of the driving cam 12, and the arc surface 1703 of the convex rod 1704 is embedded in the arc-shaped groove 1201 to perform initial positioning and preliminary limiting on the airbag pressing member 17, so that the movement of the air compression mechanism needs to overcome the resistance of the upward movement of the arc surface 1703 of the airbag pressing member 17 out of the arc-shaped groove 1201, which can effectively prevent the mis-triggering of the air compression mechanism.

[0144] In a specific embodiment, the bottom surface of the arc-shaped groove 1201 is circular arc-shaped, and the arc surface 1703 of the convex rod 1704 is a circular arc surface. During the process of the arc surface 1703 of the convex rod 1704 moving from one side of the bottom surface of the arc-shaped groove 1201 to the other side, the convex rod 1704 remains stationary and the outer cover 4 rotates in an idle stroke.

[0145] Further, referring to Figures 9A to 13B , the side wall of the storage cavity 715 of the powder container 7 has a vent hole 709, and the side wall of the airbag pressing member 17 has a pressure relief hole 1702. As shown in Figure 9C and Figure 9E , when the airbag pressing member 17 is configured in the fifth position, the side wall of the airbag pressing member 17 blocks the vent hole 709, and the vent hole 709 is not communicated with the pressure relief hole 1702; as shown in Figure 9D and Figure 9F , when the airbag pressing member 17 is configured in the sixth position, the pressure relief hole 1702 is communicated with the vent hole 709. During the process of the airbag pressing member 17 moving from the fifth position to the sixth position, the air compression airbag 18 is first used to compress air into the storage cavity 715, so as to fill and compact the powder in the storage cavity 715 into the dosing cup 902 of the powder metering wheel 9 through the powder outlet 713, which is convenient for improving the consistency of powder filling. After the pressure relief hole 1702 is communicated with the vent hole 709, the storage cavity 715 is depressurized to release the pressure in the storage cavity 715 of the powder container 7 to normal pressure, so as to avoid excessive pressure in the storage cavity 715 due to non-depressurization in the storage cavity 715 during the subsequent powder delivery process, and further avoid powder leakage from the gap when the powder metering wheel 9 of the powder delivery mechanism rotates, reducing powder waste. That is, during the process of the airbag pressing member 17 moving from the fifth position to the sixth position, the air compression process is first performed, and then the pressure relief process is performed. The pressure relief process is performed in the later stage of the downward stroke of the airbag pressing member 17. Since the pressure relief process of the storage cavity 715 in the present application is completed before the powder metering wheel 9 rotates from the third position to the fourth position, therefore, after the powder metering wheel 9 starts to rotate from the third position to the fourth position, less powder will leak from the powder outlet 713 under the air pressure.

[0146] Specifically, referring to Figure 9CAnd Figure 9D In some embodiments, a filter membrane 25 is provided at the second end of the storage chamber 715. The filter membrane 25 is located at the air compression port 714 and is spaced from the port of the air compression port 714, isolating the space of the air compression airbag 18 from the internal space of the storage chamber 715. Among them, the filter membrane 25 can be a waterproof and breathable membrane, which can filter impurities in powders such as medicinal powders and can also filter water vapor, etc., to prevent the powders in the storage chamber 715 from getting damp. The ventilation hole 709 is provided on the side wall of the storage chamber 715. One end of the ventilation hole 709 communicates with the space between the filter membrane 25 and the air compression airbag 18, that is, the ventilation hole 709 is not directly communicated with the inside of the storage chamber 715 and is relatively independent of the inside of the storage chamber 715. After the ventilation hole 709 is communicated with the pressure relief hole 1702, the gas in the space between the filter membrane 25 and the air compression airbag 18 can be discharged after passing through the ventilation hole 709 and the pressure relief hole 1702 in sequence, so as to relieve the pressure of the space between the filter membrane 25 and the air compression airbag 18. At the same time, since the filter membrane 25 is a breathable membrane, the gas in the storage chamber 715 can also enter the space between the filter membrane 25 and the air compression airbag 18 through the filter membrane 25 and then leak out from the ventilation hole 709 to relieve the pressure of the storage chamber 715, preventing the ventilation hole 709 from being directly communicated with the inside of the storage chamber 715 and the gas in the storage chamber 715 directly leaking from the ventilation hole 709 during the pressure relief process, resulting in the powder in the storage chamber 715 flying or leaking. During the stretching process of the air compression airbag 18, that is, during the air intake process of the air compression airbag 18, external gas enters the space between the filter membrane 25 and the air compression airbag 18 from the ventilation hole 709 and then enters the storage chamber 715 through the filter membrane 25, preventing the ventilation hole 709 from being directly communicated with the inside of the storage chamber 715 and external gas directly entering the storage chamber 715 from the ventilation hole 709 during the air intake process of the air compression airbag 18, bringing external water molecules into the storage chamber 715 and causing the powder in the storage chamber 715 to fly or become damp and other waste. In addition, the filter membrane 25 can also prevent the medicinal powder from entering the air compression airbag 18 from the storage chamber 715, causing the problem of waste of medicinal powder.

[0147] See Figure 13A As shown in Figure 13A , a receiving cavity 702 is further provided on the side wall of the storage chamber 715 of the powder container 7. The receiving cavity 702 is used to store a desiccant. The storage chamber 715 and the receiving cavity 702 have a common side wall, and the common side wall can be made of a water-permeable material, so that the desiccant in the receiving cavity 702 can absorb the water vapor in the storage chamber 715 and prevent the powder in the storage chamber 715 from getting damp.

[0148] In a preferred embodiment, during the movement of the airbag pressing member 17 from the fifth position to the sixth position, the downward pressing stroke of the airbag pressing member 17 is in the range of 2 mm to 6 mm. For example, in a specific embodiment, the downward pressing stroke of the airbag pressing member 17 is 3.5 mm. Among them, the first 3 mm of the downward pressing stroke is the air compression stroke, and the last 0.5 mm of the downward pressing stroke is the pressure relief stroke. When the downward pressing stroke of the airbag pressing member 17 reaches 3 mm, the pressure relief hole 1702 and the ventilation hole 709 are at the communication critical point. When the downward pressing stroke of the airbag pressing member 17 is between 3 mm and 3.5 mm, the pressure relief hole 1702 and the ventilation hole 709 are connected to achieve pressure relief. The angle of the outer cover 4 when it is in the first position is defined as 0 degrees, and the angle of the outer cover 4 when it is in the second position is 150 degrees. When the downward pressing stroke of the airbag pressing member 17 of the air compression mechanism is 3.5 mm, that is, when the airbag pressing member 17 is in the sixth position, the angle of the outer cover 4 is 62.5 degrees, and the rotation angle of the driving gear 5 driven is 62.5 degrees, and the corresponding rotation angle of the driving cam 12 is 75 degrees.

[0149] More preferably, during the opening process of the outer cover 4, when the rotation angle of the outer cover 4 is 55 degrees, the downward pressing stroke of the airbag pressing member 17 reaches 3 mm, and the air compression mechanism completes the process of compressing and discharging the powder in the powder container 7, that is, the air compression process. When the rotation angle of the outer cover 4 is 62.5 degrees, the pressure relief process is completed, and the compressed gas in the powder container 7 is released to atmospheric pressure, avoiding powder leakage when the powder metering wheel 9 rotates. It can be understood that the selection of the above angles is only an example, and other angle ranges can also be selected.

[0150] See Figures 10A to 10C , in some embodiments, the cam surface 1202 includes a first curved surface segment 1211 and a second curved surface segment 1212 connected to each other. The second curved surface segment 1212 is located at one end of the first curved surface segment 1211 away from the arc-shaped groove 1201. Among them, the first curved surface segment 1211 is a non-circular arc surface, the second curved surface segment 1212 is a circular arc surface, and the second curved surface segment 1212 is concentrically arranged with the outer peripheral side surface of the body portion 1200.

[0151] It can be understood that by setting the first curved surface segment 1211 as a non-circular arc surface, during the closing process of the outer cover 4 of the powder inhaler, the driving cam 12 rotates in the reverse direction, and the rotation of the first curved surface segment 1211 drives the airbag pressing member 17 to reset from the sixth position to the fifth position. Specifically, during the process of the airbag pressing member 17 resetting from the sixth position to the fifth position, the arc surface 1703 of the convex rod 1704 of the airbag pressing member 17 abuts against the first curved surface segment 1211. Since the first curved surface segment 1211 is a non-circular arc surface, the reverse rotation of the first curved surface segment 1211 pushes the convex rod 1704 of the airbag pressing member 17 to move upward continuously, thereby realizing the reset of the airbag pressing member 17.

[0152] Preferably, the first curved surface segment 1211 includes a first arc surface segment 1214, a plane segment 1215, and a second arc surface segment 1216 that are connected to each other. The plane segment 1215 is located between the first arc surface segment 1214 and the second arc surface segment 1216, and the plane segment 1215 is located at one end of the first arc surface segment 1214 away from the arc-shaped groove 1201. During the opening process of the outer cover 4, when the airbag pressing member 17 moves from the fifth position to the sixth position, first, it is necessary to overcome the resistance of the side wall of the arc-shaped groove 1201 near the first arc surface segment 1214 to the arc surface 1703 of the convex rod 1704, so that the tip of the convex rod 1704 disengages from the arc-shaped groove 1201. This process is the empty stroke of opening the cover and requires a relatively large torque to prevent accidental opening of the cover.

[0153] In an embodiment, the angle of the outer cover 4 at the first position is defined as 0 degrees, the angle of the outer cover 4 at the second position is 150 degrees, and the process of the outer cover 4 rotating from 0 degrees to 12 degrees is the empty stroke of opening the cover. Among them, the process of the outer cover 4 rotating from 0 degrees to 8 degrees is the first empty stroke of opening the cover, and the process of the outer cover 4 rotating from 8 degrees to 12 degrees is the second empty stroke of opening the cover. During the first empty stroke of opening the cover, the outer cover 4 rotates so that the arc surface 1703 of the tip of the convex rod 1704 abuts from the end of the arc-shaped groove 1201 away from the first arc surface segment 1214 to the end of the arc-shaped groove 1201 near the first arc surface segment 1214, that is, the arc surface 1703 of the tip of the convex rod 1704 slides across the bottom surface of the arc-shaped groove 1201. Preferably, the torque during this process is 0.05 N·m, which can effectively prevent accidental opening of the cover due to non-human factors. During the second empty stroke of opening the cover, the outer cover 4 rotates to make the arc surface 1703 of the tip of the convex rod 1704 abut from the end of the arc-shaped groove 1201 near the first arc surface segment 1214 to the first arc surface segment 1214, that is, it is necessary to disengage the arc surface 1703 of the tip of the convex rod 1704 from the arc-shaped groove 1201, which requires a larger torque compared to the first empty stroke of opening the cover. Preferably, the torque during the second empty stroke of opening the cover is 0.15 N·m. Setting a larger resistance to opening the cover can more effectively prevent accidental opening of the cover.

[0154] During the opening process of the outer cover 4, when the outer cover 4 rotates to 12 degrees, the arc surface 1703 of the tip of the convex rod 1704 of the airbag pressing member 17 disengages from the arc-shaped groove 1201 and abuts on the first arc surface segment 1214, and the empty stroke of opening the cover of the outer cover 4 is completed. After that, during the process of the outer cover 4 rotating from 12 degrees to 62.5 degrees, the air compression mechanism performs the air compression process and the pressure relief process, and at this time, the outer cover 4 performs the first load stroke of opening the cover.

[0155] When the outer cover 4 rotates to 12 degrees, the arc surface 1703 at the tip of the convex rod 1704 has detached from the arc-shaped groove 1201. The outer cover 4 will instantaneously open and rotate instantaneously from 12 degrees to 55 degrees, driving the drive cam 12 to rotate instantaneously to 66 degrees. At this time, the convex rod 1704 of the airbag pressing member 17 will also instantaneously move downward. The arc surface 1703 at the tip of the convex rod 1704 instantaneously moves to abut against one end of the flat section 1215 close to the second arc section 1216. The downward stroke of the convex rod 1704 of the airbag pressing member 17 reaches 3 mm, and the air compression mechanism realizes the function of instantaneous air compression. When the outer cover 4 rotates to 55 degrees, the pressure relief hole 1702 and the ventilation hole 709 are at the connection critical point. During the process of the outer cover 4 rotating from 55 degrees to 62.5 degrees, the drive cam 12 rotates from 66 degrees to 75 degrees. The tip of the convex rod 1704 of the airbag pressing member 17 abuts from one end of the second arc section 1216 close to the flat section 1215 to abut against one end of the second arc section 1216 far from the flat section 1215. That is, the tip of the convex rod 1704 slides over the second arc section 1216. During this process, the downward stroke of the convex rod 1704 of the airbag pressing member 17 is between 3 mm and 3.5 mm, and the pressure relief hole 1702 and the ventilation hole 709 are connected to realize pressure relief. The torque of the outer cover 4 is constant during the first lid-opening load stroke. Preferably, the torque of the outer cover 4 during the first lid-opening load stroke is 0 N·m. That is, the torque during the process of the outer cover 4 rotating from 12 degrees to 62.5 degrees is 0 N·m, which is beneficial for the outer cover 4 to realize instantaneous opening, enabling the air compression mechanism to rapidly and instantaneously compress air and improving the air compression effect.

[0156] When the outer cover 4 rotates to 62.5 degrees, the arc surface 1703 at the tip of the convex rod 1704 of the airbag pressing member 17 is at the critical point between the first curved surface section 1211 and the second curved surface section 1212. When the outer cover 4 continues to rotate from 62.5 degrees to 150, the drive cam 12 rotates from 75 degrees to 180 degrees. The arc surface 1703 of the convex rod 1704 of the airbag pressing member 17 abuts from one end of the second curved surface section 1212 close to the first curved surface section 1211 to abut against one end of the second curved surface section 1212 far from the first curved surface section 1211. Since the second curved surface section 1212 is an arc surface and the second curved surface section 1212 is concentric with the outer peripheral side surface of the body portion 1200 and the pitch circle of the gear 1203, during the process of the outer cover 4 rotating from 62.5 degrees to 150, the convex rod 1704 of the airbag pressing member 17 remains in the sixth position, that is, at 3.5 mm, and the convex rod 1704 of the airbag pressing member 17 does not move.

[0157] See Figures 1 to 11, a stop groove 1213 is provided at one end of the second curved surface section 1212 of the driving cam 12 away from the first curved surface section 1211. After the outer cover 4 is opened to the in-place position, the tip of the convex rod 1704 of the airbag pressing member 17 is located in the stop groove 1213, and the driving cam 12 is acted on by the gravity of the airbag pressing member 17, so that the tip of the convex rod 1704 of the airbag pressing member 17 limits the driving cam 12, preventing the driving cam 12 from rotating reversely under the action of the return torsion spring 15 (such as Figure 17A ) after the user releases the hand after the outer cover is opened to the in-place position, resulting in the problem that the outer cover automatically closes after being opened to the in-place position. In a specific embodiment, the stop groove 1213 is an arc-shaped groove, and the bottom surface of the stop groove 1213 is arc-shaped, so as to facilitate better cooperation between the tip of the convex rod 1704 and the stop groove 1213.

[0158] (2) Powder delivery mechanism

[0159] Refer to Figures 12A to 14B , the powder delivery mechanism includes a powder container 7 and a powder metering wheel 9, and the powder metering wheel 9 of the powder delivery mechanism is rotatably connected to the powder container 7. Specifically, the powder container 7 has a storage cavity 715, an inhalation channel 706, and a first cylindrical groove 716. The powder metering wheel 9 is installed in the first cylindrical groove 716, and the powder metering wheel 9 can rotate back and forth between a third position and a fourth position. When in the third position, the dosing cup 902 of the powder metering wheel 9 is in the powder filling position, and when in the fourth position, the dosing cup 902 of the powder metering wheel 9 is in the powder inhalation position, that is, the position corresponding to the inhalation channel 706. It should be noted that the powder metering wheel 9 of the present application rotates back and forth between the third position and the fourth position, and its back-and-forth rotation path is along the minor arc, that is, the rotation direction of the powder metering wheel 9 from the third position to the fourth position is opposite to the rotation direction from the fourth position to the third position, and it does not rotate one full circle along the inner circumference of the first cylindrical groove 716 to achieve the back-and-forth rotation between the third position and the fourth position. By rotating the powder metering wheel 9 back and forth between the third position and the fourth position along the minor arc, the movement path of the powder metering wheel 9 can be made the shortest, and it can move along the optimal path, so as to more effectively avoid the waste and loss of the medicine powder in the dosing cup 902 during the movement of the powder metering wheel 9.

[0160] The powder metering wheel 9 includes a dosing cup 902. When the powder metering wheel 9 is configured in the third position, the dosing cup 902 is correspondingly arranged with the powder outlet 713 of the storage chamber 715 for receiving the powder from the powder container 7. When the powder metering wheel 9 is configured in the fourth position, the dosing cup 902 is correspondingly arranged with the inlet 704 of the inhalation channel 706. Specifically, during the process of the airbag pressing member 17 moving from the fifth position to the sixth position, the powder metering wheel 9 is in the third position. The airbag pressing member 17 acts on the air compression airbag 18 under the drive of the elastic member 19 and fills and compacts the powder in the storage chamber 715 into the dosing cup 902 of the powder metering wheel 9.

[0161] See Figure 13A , 14A and 14B. Specifically, the powder metering wheel 9 is installed in the first cylindrical groove 716. The powder metering wheel 9 has an outer arc surface 901, and the outer arc surface 901 of the powder metering wheel 9 is fitted with the inner arc surface 705 of the first cylindrical groove 716 of the powder container 7. Among them, the outer arc surface 901 of the powder metering wheel 9 is an arc-shaped toroidal surface covering the reciprocating stroke. The radian corresponding to the arc of the outer arc surface 901 is greater than or equal to 140 degrees and less than or equal to 170 degrees. Preferably, the radian corresponding to the arc of the outer arc surface 901 is about 150°.

[0162] See Figure 13A and Figure 14B , there is a cylinder 703 in the first cylindrical groove 716 of the powder container 7. The cylinder 703 is defined as the second cylinder. The powder metering wheel 9 has a central hole 906, and the central hole 906 is defined as the second central hole. The first end of the powder metering wheel 9 has a top pressing spring arm 909, and the top pressing spring arm 909 is defined as the first top pressing spring arm. The top pressing spring arm 909 is arranged around the central hole 906. The top pressing spring arm 909 of the powder metering wheel 9 is cooperatively arranged with the cylinder 703 in the first cylindrical groove 716 of the powder container 7. Specifically, the cylinder 703 in the first cylindrical groove 716 is assembled into the central hole 906, the top pressing spring arm 909 abuts against the cylinder 703 in the first cylindrical groove 716, and the inner diameter formed by the top pressing spring arm 909 is smaller than the outer diameter of the cylinder 703. Thus, during assembly, the top pressing spring arm 909 undergoes elastic deformation, and the elastic deformation of the top pressing spring arm 909 of the powder metering wheel 9 provides a pressing force for the inner arc surface 705 of the first cylindrical groove 716 to fit with the outer arc surface 901 of the powder metering wheel 9, improving the sealing reliability and enabling the powder metering wheel 9 to be more tightly assembled in the first cylindrical groove 716 of the powder container 7, facilitating a good assembly connection between the powder metering wheel 9 and the powder container 7.

[0163] A dose cup 902 is provided on the outer side surface of the powder metering wheel 9. Specifically, the dose cup 902 is provided on the outer arc surface 901 of the powder metering wheel 9, and the dose cup 902 is used to contain powder. In a preferred embodiment, only one dose cup 902 is provided on the outer arc surface 901 of the powder metering wheel 9. Only by the reciprocating rotation of the powder metering wheel 9 between the third position and the fourth position, a dose cup 902 is driven to reciprocate between the inlet 704 position of the inhalation channel 706 and the powder outlet 713 position, so as to realize the filling and delivery of the powder, thereby facilitating the user's suction.

[0164] It can be understood that the amount of powder contained in one dose cup 902 is fixed, and the amount of powder entering the inhalation channel 706 during the user's suction is fixed, avoiding the possibility of excessive powder such as medicinal powder when multiple dose cups 902 are arranged at intervals along the circumferential direction on the outer side surface of the cylindrical metering component, and when the metering component rotates, multiple doses are allowed to be continuously distributed into the inhalation channel 706; or, when a series of dose grooves or one dose groove is provided on the surface of the flat metering component, when the powder is delivered by a translational motion, the position state during inhalation and the open position state of the outer cover 4 are inconsistent, resulting in the user inhaling multiple doses of powder in one inhalation, and further resulting in the problem of excessive powder inhalation by the user. That is, only one dose cup 902 is provided on the outer arc surface 901 of the powder metering wheel 9, and the amount of powder inhaled by the user at the outlet 102 position of the mouthpiece 101 at one time is fixed, and there is no possibility of inhaling multiple doses of powder, so that the powder inhalation amount can be accurately controlled, and the structure is simplified.

[0165] In other embodiments, one dose cup 902 provided on the outer arc surface 901 of the powder metering wheel 9 may also include multiple sub-dose cups. That is, at one position, one dose cup 902 can be partitioned into multiple spaced-apart sub-dose cups. For example, one or more partitions can be provided in the dose cup 902 to partition one dose cup 902 into multiple sub-dose cups; or, in other embodiments, multiple dose cups 902 can also be provided at intervals on the outer arc surface 901 of the powder metering wheel 9, as long as it is ensured that at a fixed position, the powder capacity in the dose cup 902 is fixed, so as to facilitate accurate control of the powder amount inhaled by the user.

[0166] See Figure 14A, in one embodiment, a first powder scraping groove 903 is further provided on the outer arc surface 901 of the powder metering wheel 9. The first powder scraping groove 903 is a notch provided on the outer arc surface 901. Specifically, the first powder scraping groove 903 is inclined to the circumferential direction of the powder metering wheel 9. The first powder scraping groove 903 is used to scrape off and discharge the fine medicinal powder adhering to the inner arc surface 705 of the powder container 7, so as to avoid the fine medicinal powder on the inner arc surface 705 of the powder container 7 from blocking the movement of the powder metering wheel 9 and improve the movement smoothness of the powder metering wheel 9 in the first cylindrical groove 716 of the powder container 7. Preferably, the depth of the first powder scraping groove 903 is 0.2 mm - 0.4 mm.

[0167] In one embodiment, a second powder scraping groove 904 is further provided on the outer arc surface 901 of the powder metering wheel 9. The depth of the second powder scraping groove 904 is greater than that of the first powder scraping groove 903. Preferably, the depth of the second powder scraping groove 904 is 0.7 mm - 0.9 mm. The second powder scraping groove 904 is used to scrape off and discharge the large particle medicinal powder adhering to the inner arc surface 705 of the powder container 7, so as to further improve the movement smoothness of the powder metering wheel 9 in the first cylindrical groove 716 of the powder container 7. In some embodiments, the width of the second powder scraping groove 904 can also be greater than that of the first powder scraping groove 903. Among them, along the direction in which the powder metering wheel 9 turns from the third position to the fourth position, the second powder scraping groove 904 is arranged on the side of the first powder scraping groove 903 away from the dose cup 902, which is convenient for scraping off and discharging the large particle medicinal powder adhering to the inner arc surface 705 of the powder container 7 by the second powder scraping groove 904 during the process of the powder metering wheel 9 turning from the third position to the fourth position, that is, during the medicine delivery stroke of the powder metering wheel 9, reducing the movement resistance of the large particle medicinal powder to the powder metering wheel 9, and then scraping off and discharging the remaining fine medicinal powder adhering to the inner arc surface 705 of the powder container 7 by the first powder scraping groove 903, so as to better ensure the movement smoothness of the powder metering wheel 9 in the first cylindrical groove 716 of the powder container 7. The sizes of the first powder scraping groove 903 and the second powder scraping groove 904 are different. During the medicine delivery stroke and the reset stroke of the powder metering wheel 9, that is, during the process of the powder metering wheel 9 turning back from the fourth position to the third position, the first powder scraping groove 903 and the second powder scraping groove 904 can clean the medicinal powder on the inner arc surface 705 of the powder container 7 multiple times and with multiple gradients, which can further improve the accuracy of the medicine delivery dose.

[0168] In one embodiment, the end face of the first end of the powder metering wheel 9 has a first rib 908. The first rib 908 avoids friction between the plane and adjacent parts, and improves the smoothness of the reciprocating movement of the powder metering wheel 9 through the contact friction of the rib.

[0169] In one embodiment, the end face of the second end of the powder metering wheel 9 has a second rib 907. The second rib 907 prevents friction between the plane and adjacent parts, and improves the smoothness of the reciprocating movement of the powder metering wheel 9 through the contact friction of the rib.

[0170] In one embodiment, the end face of the first end of the powder metering wheel 9 has a first rib 908, and the second end has a second rib 907.

[0171] In one embodiment, referring to Figure 14B , the first end of the powder metering wheel 9 further has a groove 911 and a driving spring arm 910. The groove 911 is arranged around the central hole 906. One end of the driving spring arm 910 is connected to the side wall of the groove 911, and the other end is a free end. The driving spring arm 910 and the pressing spring arm 909 are arranged at intervals. One end of the wedge-shaped column 1005 of the dose protection plate 10 extends into the groove 911. The driving spring arm 910 is used to abut against the wedge-shaped column 1005 of the dose protection plate 10 to drive the dose protection plate 10 to rotate and reset; arranging the groove 911 can also reduce the weight of the powder metering wheel 9, making it easier to drive the powder metering wheel 9 to rotate. The specific manner and process of the driving spring arm 910 driving the dose protection plate 10 to rotate and reset will be described in detail in the subsequent process of the outer cover 4 closing the cover and triggering the function mechanism to reset, and will not be elaborated here.

[0172] Referring to Figure 10B and Figure 14A , the surface of the body part 1200 of the driving cam 12 facing away from the gear 1203 further has an annular boss 1207. The annular boss 1207 is coaxially arranged with the gear 1203 and is used to drive the powder metering wheel 9 to rotate. Specifically, the second end of the powder metering wheel 9 has a boss 905, which is defined as the first boss. The boss 905 of the powder metering wheel 9 is used to cooperate with the annular boss 1207 of the driving cam 12 to achieve rotational drive. Specifically, the two annular bosses 1207 are centrally symmetrically arranged with the center of the central hole 1204, and the two bosses 905 are centrally symmetrically arranged with the center of the central hole 906.

[0173] In a preferred embodiment, during the process of opening the lid, the angle of the outer lid 4 at the second position is 150 degrees. During the process of the outer lid 4 rotating from the first position (i.e., 0 degree) to the second position, wherein, during the process of the outer lid 4 rotating from 0 degree to 62.5 degrees (i.e., the outer lid 4 rotates by 62.5 degrees), the outer lid 4 drives the driving gear 5 to rotate, and then drives the driving cam 12 to rotate from 0 degree to 75 degrees (i.e., the driving cam 12 rotates by 75 degrees). During this process, the powder metering wheel 9 is in a static state, and the boss 905 of the powder metering wheel 9 does not contact the annular boss 1207 of the driving cam 12, and the powder metering wheel 9 does not rotate at the third position; during the process of the outer lid 4 rotating from 62.5 degrees to 150 degrees (i.e., the outer lid 4 rotates by 87.5 degrees), the outer lid 4 drives the driving gear 5 to rotate, and then drives the driving cam 12 to rotate from 75 degrees to 180 degrees (i.e., the driving cam 12 rotates by 105 degrees). During this process, the boss 905 of the powder metering wheel 9 is in contact with the annular boss 1207 of the driving cam 12. The annular boss 1207 of the driving cam 12 cooperates with the boss 905 of the powder metering wheel 9 to drive the powder metering wheel 9 to rotate from the third position to the fourth position. The powder metering wheel 9 rotates by 105 degrees during this process, that is, when the dosing cup 902 of the powder metering wheel 9 rotates from the position of the powder outlet 713 to the inlet 704 of the inhalation channel 706, the rotation angle of the powder metering wheel 9 is 105 degrees.

[0174] During the process of the outer lid 4 rotating from 62.5 degrees to 150 degrees, the driving cam 12 rotates from 75 degrees to 180 degrees, driving the powder metering wheel 9 to rotate from the third position to the fourth position, that is, the dosing cup 902 of the powder metering wheel 9 rotates from the position of the powder outlet 713 of the powder container 7 to the inlet 704 of the inhalation channel 706. The powder delivery mechanism realizes the powder delivery process during this process. During the process of opening the lid of the outer lid 4, a second lid-opening load stroke is performed within this rotation range, which requires a relatively large torque. The torque of the outer lid 4 is constant during the second lid-opening load stroke. Preferably, the torque of the outer lid 4 during the second lid-opening load stroke is 0.1 N·m, ensuring that the outer lid 4 opens smoothly and evenly without sudden torque until the lid is completely opened, thereby ensuring the powder delivery effect and avoiding powder leakage or waste due to flying.

[0175] The outer lid 4 is linked and cooperated with the powder metering wheel 9 and the air compression mechanism respectively. When the outer lid 4 is configured at the first position, the airbag pressing member 17 is limited at the fifth position. During the process of the outer lid 4 rotating from the first position to the second position, the limitation on the airbag pressing member 17 is first released, so that the elastic member 19 drives the airbag pressing member 17 to move from the fifth position to the sixth position, and then drives the powder metering wheel 9 to rotate from the third position to the fourth position. During the process of the outer lid 4 reversing and resetting from the second position to the first position, it drives the powder metering wheel 9 to reverse and reset from the fourth position to the third position, and drives the airbag pressing member 17 to move reversely and reset from the sixth position to the fifth position.

[0176] After the powder delivery mechanism completes the powder delivery process, the outer cover 4 rotates to the second position, and the dose cup 902 of the powder metering wheel 9 of the powder delivery mechanism is in a position corresponding to the inlet 704 of the inhalation channel 706. The outer cover 4 is fully opened to expose the outlet 102 of the mouthpiece 101, and the user can suck at the position of the outlet 102 of the mouthpiece 101, which is convenient for triggering the inhalation trigger mechanism to achieve the inhalation trigger function.

[0177] See Figures 15A to 23B , Figure 15A is Figure 1 A schematic structural diagram of the inhalation trigger device of the provided powder inhaler when it is in a state on the powder container. Figure 15B is Figure 15A A schematic structural diagram of the inhalation trigger device provided when it is in another state on the powder container. Figure 16A is Figure 15A A schematic structural diagram of the inhalation trigger device provided after removing the powder container. Figure 16B is Figure 15B A schematic structural diagram of the inhalation trigger device provided after removing the powder container. Figure 17A is Figure 16A A schematic structural diagram of the inhalation trigger device provided from another angle. Figure 17B is Figure 16B A schematic structural diagram of the inhalation trigger device provided from another angle. Figure 18A is Figure 1 A schematic exploded view of the counting mechanism of the provided powder inhaler. Figure 18B is Figure 18A A schematic assembled view of the counting mechanism provided. Figure 20 is Figure 1 A schematic structural diagram of the dose protection plate of the inhalation trigger device of the provided powder inhaler. Figure 21A is Figure 1 A schematic sectional view of the assembly of the powder metering wheel and the dose protection plate of the provided powder inhaler when in a state. Figure 21B is Figure 1 A schematic sectional view of the assembly of the powder metering wheel and the dose protection plate of the provided powder inhaler when in another state. Figure 21C is Figure 21A Partial enlarged view of Figure 21D is Figure 21B Partial enlarged view of Figure 21E is Figure 1 A schematic sectional view of the assembly of the powder metering wheel and the dose protection plate of the provided powder inhaler when in yet another state. Figure 21F is Figure 21E Partial enlarged view of Figure 22A is Figure 1Schematic structural view of the air intake baffle of the inhalation trigger device of the provided powder inhaler at an angle Figure 22B is Figure 22A Schematic structural view of the air intake baffle at another angle provided Figure 22C is ​ Schematic structural view of the air intake baffle at yet another angle provided ​ is ​ Schematic structural view of the front housing of the provided powder inhaler at an angle ​ is ​ Schematic structural view of the front housing of the provided powder inhaler at another angle

[0178] (3) Inhalation trigger mechanism

[0179] See ​ , the inhalation trigger mechanism includes an air intake baffle 11 and a dose protection plate 10. The dose protection plate 10 includes an occlusion portion 1004, and the air intake baffle 11 is linked and cooperated with the dose protection plate 10. The powder inhaler further includes a return torsion spring 15 and a driving torsion spring 16. The air intake baffle 11 and the dose protection plate 10 of the inhalation trigger mechanism, in combination with the return torsion spring 15, the driving torsion spring 16, as well as the powder container 7, the powder metering wheel 9, and the driving cam 12, jointly achieve the inhalation trigger function

[0180] See ​ and 13B , the powder container 7 further has an air flow channel 708 communicating with the inhalation channel 706. The inhalation channel 706 needs to be communicated with the outside atmosphere through the air flow channel 708. See ​ , when the inhalation trigger mechanism is in the initial state, the air intake baffle 11 blocks the air flow channel 708, and the air flow channel 708 is not communicated with the outside atmosphere. The occlusion portion 1004 of the dose protection plate 10 occludes the powder outlet of the dose cup 902 located at the inlet 704 of the inhalation channel 706. At this time, the inhalation channel 706 cannot be communicated with the outside atmosphere through the air flow channel 708. When the negative pressure inside the inhalation channel 706 is greater than the threshold value, that is, when the inhalation flow rate of the user is higher than the working threshold value, the inhalation trigger mechanism is triggered to act. Specifically, the air intake baffle 11 rotates and opens the air flow channel 708, the air flow channel 708 is communicated with the outside atmosphere, the inhalation channel 706 is communicated with the outside atmosphere through the air flow channel 708, and the air intake baffle 11 triggers the dose protection plate 10 to rotate, so that the occlusion portion 1004 of the dose protection plate 10 deviates and does not occlude the powder outlet of the dose cup 902, and the powder outlet of the dose cup 902 is exposed at the position of the inlet 704 of the inhalation channel 706. Among them, the working threshold value can be in the range of 15 L / min to 35 L / min. Preferably, the working threshold value for triggering the inhalation trigger mechanism to act is in the range of 20 L / min - 25 L / min

[0181] It can be understood that an inhalation trigger mechanism is provided in the powder inhaler. Only when the inhalation flow rate of the user is higher than the working threshold, the intake baffle 11 will rotate and open the air flow channel 708, so that the inhalation channel 706 is communicated with the outside atmosphere through the air flow channel 708, and the rotation of the intake baffle 11 will trigger the rotation of the dose protection plate 10 to not block the powder outlet of the dose cup 902, so that the powder outlet of the dose cup 902 is communicated with the inhalation channel 706, and the powder in the dose cup 902 is exposed, taken out by the air flow in the inhalation channel 706 and depolymerized. At this time, the air flow rate is relatively high, and the depolymerization effect is good, realizing the flow rate threshold control of powder release, improving the depolymerization effect of powder release, and avoiding powder waste.

[0182] See ​ , ​ , there is an installation hole 707 on the side wall of the intake port of the air flow channel 708, the intake baffle 11 is rotatably installed on the installation hole 707, and the side wall of the air flow channel 708 surrounds the intake baffle 11.

[0183] Specifically, the intake baffle 11 includes a baffle body 1110, and the baffle body 1110 is rotatably connected to the side wall of the air flow channel 708. In one embodiment, the intake baffle 11 further includes a rotating shaft 1106, the rotating shaft 1106 is arranged at the first end of the baffle body 1110, and the rotating shaft 1106 passes through the installation hole 707 on the side wall of the port of the air flow channel 708 and is rotatably connected to the installation hole 707.

[0184] See ​ , ​ , ​ , the first surface of the baffle body 1110 has a convex platform 1101, the first surface is the surface of the baffle body 1110 facing outside the port of the air flow channel 708, and the convex platform 1101 is defined as the second convex platform. The convex platform 1101 is used to increase the complexity of the side flow channel. Specifically, a convex platform 1101 protruding from the outer surface of the baffle body 1110 is provided on the baffle body 1110, so that the side flow channel changes from a direct flow channel to an "L"-shaped flow channel, thereby increasing the flow resistance of the air flow and realizing a lower trigger flow rate under the condition of the same wind receiving area, making it easier to realize the inhalation trigger function and facilitating the use of the powder inhalation device by users with weak bodies. The "L"-shaped flow channel means that the flow channel includes a bent first flow channel section and a second flow channel section, and the included angle between the first flow channel section and the second flow channel section can be 80-100 degrees, such as 90 degrees, which will be introduced in detail later.

[0185] The outer surface of the baffle body 1110 of the present application is defined as the outer surface facing the outside of the port of the air flow channel 708 with respect to the port of the air flow channel 708. The boss 1101 can be directly protruded from the outer surface of the baffle body 1110. For example, the baffle body 1110 is a solid structure; the boss 1101 can also be formed by recessing the baffle body 1110, that is, the boss 1101 is formed by bending a part of the baffle body 1110 towards the outside of the port facing the air flow channel 708, so that the baffle body 1110 is only a frame, which can reduce the weight of the intake baffle 11. The boss 1101 can be integrally formed with the baffle body 1110, or the boss 1101 can be directly connected and fixed to the outer surface of the baffle body 1110.

[0186] In one embodiment, the boss 1101 covers the central area of the surface of the baffle body 1110 outside the port facing the air flow channel 708. The projection of the boss 1101 on the baffle body 1110 is similar in shape to the baffle body 1110, and the projection of the boss 1101 on the baffle body 1110 covers more than 60% of the area of the baffle body 1110, so as to further increase the flow resistance of the side flow channel, ensure the consistency of the suction resistance at each stage during the drug administration process of the powder inhaler, improve the drug administration effect of the powder inhaler, and further improve the compliance of the user, so that the user has a better user experience. Among them, the area of the projection of the boss 1101 on the baffle body 1110 covering the baffle body 1110 is related to the width of the annular surface 1109 and can be designed according to needs.

[0187] In other embodiments, the boss 1101 covers other areas of the surface of the baffle body 1110 outside the port facing the air flow channel 708. The boss 1101 can also be set to other shapes, and the ratio of the projected area of the boss 1101 on the baffle body 1110 to the area of the baffle body 1110 can also be set to other values, as long as the boss 1101 can increase the complexity of the side flow channel and increase the flow resistance of the air flow.

[0188] In one embodiment, along the direction from the first end of the baffle body 1110 to the opposite second end (the direction away from the rotating shaft 1106), the height of the boss 1101 gradually decreases, so that the top surface of the boss 1101 forms an inclined surface, and the inclined surface has a certain guiding effect on guiding the air flow direction, so as to more easily realize the inhalation trigger function.

[0189] Specifically, refer to Figure 9G 、 Figure 9H 、 Figure 15A 、 Figure 15B and Figures 22A to 23B, the front housing 1 has a suction nozzle 101, the suction nozzle 101 is arranged corresponding to the suction channel 706 and communicates with the suction channel 706. An air inlet 104 and a grille 103 are arranged on the side wall of the front housing 1. The grille protrudes from the outer wall surface of the front housing 1, and the air inlet 104 communicates the outside atmosphere with the space inside the housing assembly. In a specific embodiment, the grille 103 corresponds to the position above the suction nozzle 101 and is adjacent to the air inlet 104. The grille 103 protrudes from the outer wall surface of the front housing 1, which can prevent the lips from contacting the air inlet 104 and blocking the air inlet 104 when the user sucks the powder from the position of the suction nozzle 101, resulting in problems such as poor air intake or the outside atmosphere being unable to enter the inside of the housing assembly from the air inlet 109. As Figure 23B shown, in a preferred embodiment, three air inlets 104 and two grilles 103 are arranged on the side wall of the front housing 1, and the grilles 103 and the air inlets 104 are arranged alternately. In other embodiments, the air inlets 104 and the grilles 103 can be arranged at other positions, and they can also be set to any other number.

[0190] As Figure 22C shown, along the circumferential direction of the boss 1101, the outer peripheral side surface of the boss 1101 and the outer peripheral side surface of the baffle body 1110 are evenly spaced. The part of the surface of the baffle body 1110 facing outside the port of the air flow channel 708 that is not covered by the boss 1101 forms an annular surface 1109. Both the annular surface 1109 and the outer peripheral side surface of the boss 1101 are used to cooperate with the front housing 1 of the powder inhaler to form an L-shaped air inlet flow channel. Specifically, as Figure 23A and Figure 23B shown, an annular flange 111 is arranged on the inner wall surface of the front housing 1. The annular flange 111 surrounds the air inlet 104. Specifically, the annular flange 111 surrounds three air inlets 104 and two grilles 103. Refer to Figures 9C to 9H, one end of the annular flange 111 is disposed in the air flow passage 708, and the side wall of the front housing 1 seals the port of the air flow passage 708. When the inhalation trigger mechanism is in the initial state, the inner peripheral side surface of the annular flange 111 of the front housing 1 is spaced from the outer peripheral side surface of the boss 1101 of the intake baffle 11 and cooperates to form a first flow passage section. The end surface of the annular flange 111 away from the front housing 1 abuts against the annular surface 1109 of the intake baffle 11 and cooperates to form a second flow passage section. The first flow passage section and the second flow passage section communicate with each other to form an L-shaped intake air flow passage Q1. That is, before the inhalation trigger mechanism is triggered, the outside air enters the internal space of the housing assembly through the air inlet 104 on the front housing 1, and the L-shaped intake air flow passage Q1 formed by the cooperation of the baffle body 1110, the boss 1101 of the intake baffle 11 and the annular flange 111 of the front housing 1 allows the outside air to enter the powder inhaler, ensuring the consistency of the suction resistance at each stage during the drug administration process of the powder inhaler, avoiding too large suction resistance inside the powder inhaler before inhalation trigger, which affects the air compression process or the powder delivery process, and improving the drug administration effect of the powder inhaler.

[0191] When the user inhales at the mouthpiece 101 and the negative pressure inside the inhalation passage 706 is greater than the threshold value, that is, when the air flow velocity during the user's inhalation is greater than the working threshold value, the internal negative pressure will push the intake baffle 11 to rotate and open the air flow passage 708, and the air flow passage 708 communicates with the outside air through the air inlet 104.

[0192] As Figure 9G and Figure 9H shown, the distance between the top surface of the boss 1101 of the intake baffle 11 and the surface of the baffle body 1110 facing outside the port of the air flow passage 708 is the first distance L1, that is, the height of the boss 1101 is L1, and the thickness of the annular flange 111 on the inner wall surface of the front housing 1 is the second distance L2. The ratio between the first distance L1 and the second distance L2 is 1:2 - 7:1. Preferably, the first distance L1 is greater than the second distance L2, and the ratio between the first distance L1 and the second distance L2 is 1:1 - 5:1. Setting the ratio between the first distance L1 and the second distance L2 within the above range can increase the pressure difference between the inner side and the outer side of the intake baffle 11, that is, increase the pressure difference between the side of the intake baffle 11 close to the air flow passage 708 and the side of the intake baffle 11 close to the air inlet 104 of the front housing 1, increase other resistances, and the increased pressure difference on both sides of the intake baffle 11 is more conducive to pushing the intake baffle 11 to rotate to open the air flow passage 708, so as to more easily realize the inhalation trigger function.

[0193] In one embodiment, the intake baffle 11 further includes a rotating member 1108. The rotating shaft 1106 is disposed at one end of the baffle body 1110. The rotating member 1108 is connected to the free end of the rotating shaft 1106 and is spaced apart from the baffle body 1110. The first end of the rotating member 1108 has a curved surface that faces the outside of the port of the air flow channel 708 (specifically, the line connecting the two ends of the curved surface is substantially parallel to the baffle body 1110). Specifically, the curved surface can be an arc surface, and the curved surface is used to guide the air flow so that the air flow path lengths on both sides of the baffle body 1110 are the same.

[0194] Specifically, refer to Figure 9C , Figure 13A , Figure 13B , Figure 15A and Figure 15B , the side wall of the air flow channel 708 of the powder container 7 is connected to the side wall of the storage chamber 715. At one end where the side wall of the air flow channel 708 is connected to the side wall of the storage chamber 715, there are provided first diversion holes 710 and second diversion holes 717 that are spaced apart from each other. One end of the inhalation channel 706 close to the nozzle 101 has first air inlets 718 and second air inlets 719 that are spaced apart from each other. The first diversion holes 710 communicate the air flow channel 708 and the first air inlets 718, and the second diversion holes 717 communicate the air flow channel 708 and the second air inlets 719. The inner wall surface of the front housing 1 and the outer wall surface of the inhalation channel 706 are spaced apart to form a diversion channel 720 (as Figure 9C ), and the diversion channel 720 communicates the air flow channel 708 with the first air inlets 718 and the second air inlets 719. Refer to Figure 15B, when the flow rate of the user's inhalation airflow is greater than the working threshold and the negative pressure inside the inhalation channel 706 is greater than the threshold, the intake baffle 11 rotates and opens the airflow channel 708. The air inlet 104 on the front housing 1 penetrates through the first diversion hole 710 and the second diversion hole 717 via the airflow channel 708. After the outside air enters the inside of the housing assembly through the air inlet 104 of the front housing 1, part of the gas flows through the airflow channel 708 to the first diversion hole 710, part of the gas flows through the airflow channel 708 to the second diversion hole 717, and the remaining gas flows through the airflow channel 708 to the diversion channel 720. Among them, the gas flowing out of the first diversion hole 710 flows along the outer side of the side wall of the airflow channel 708 to the second curved surface 1104 and finally flows to the first airflow inlet 718, the gas flowing out of the second diversion hole 717 flows along the outer side of the side wall of the airflow channel 708 to the first curved surface 1103 and finally flows to the second airflow inlet 719, and the gas flowing out of the diversion channel 720 can enter the first airflow inlet 718 and the second airflow inlet 719 simultaneously, facilitating the inhalation of powder through the inhalation channel 706. It can be understood that by setting the air inlet 104 of the front housing 1 to three, and respectively setting the first diversion hole 710, the second diversion hole 717 and the diversion channel 720, the ventilation cross-section of the three-way airflow can be made consistent with the ventilation cross-sectional area of the three air inlets 104 of the front housing 1, avoiding gas loss during intake; at the same time, both the first curved surface 1103 and the second curved surface 1104 are arc-shaped surfaces, which can guide the airflow direction and make the lengths of the airflow paths on both sides of the baffle body 1110 the same.

[0195] In one embodiment, as Figure 13B and Figure 15B shown, there are two oppositely arranged arc-shaped ribs inside the inhalation channel 706. The two arc-shaped ribs and the side wall of the inhalation channel 706 enclose a vortex-shaped air passage. After the gas enters the inside of the inhalation channel 706 through the first airflow inlet 718 and the second airflow inlet 719 respectively, a vortex is formed. The vortex carries the powder in the dose cup 902 at the inlet 704 of the inhalation channel 706 into the inhalation channel 706, and after being depolymerized in the inhalation channel 706, it finally flows to the mouthpiece 101 and is inhaled by the user. The above setting is more conducive to the depolymerization of powders such as medicine powder in the inhalation channel 706, avoiding waste of medicine powder and improving the utilization rate of medicine powder.

[0196] See Figures 22A to 22C, the second end of the rotating member 1108 away from the surface of the baffle body 1110 has a protruding cylinder 1102, and the cylinder 1102 is defined as the third cylinder. The cylinder 1102 is used to abut against the driving arm of the return torsion spring 15 of the powder inhaler, so that the baffle body 1110 fits against the front housing 1. Specifically, in one embodiment, the number of the rotating shafts 1106 is two, and the two rotating shafts 1106 are respectively arranged on opposite sides of the baffle body 1110, and the two rotating shafts 1106 are respectively defined as the first rotating shaft 1106a and the second rotating shaft 1106b. The number of the rotating members 1108 is two, and the two rotating members 1108 are respectively defined as the first rotating member 1108a and the second rotating member 1108b. The first rotating member 1108a is connected to the free end of the first rotating shaft 1106a. The first end of the first rotating member 1108a has a first curved surface 1103, and the surface of the second end away from the baffle body 1110 has a protruding cylinder 1102. The second rotating member 1108b is connected to the free end of the second rotating shaft 1106b. The first end of the second rotating member 1108b has a second curved surface 1104, and the second end has an arc groove surface 1107.

[0197] In one embodiment, the side surface of the baffle body 1110 further has a shoulder 1105 surrounding the rotating shaft 1106. The shoulder 1105 is spaced from the rotating member 1108. The shoulder 1105 is used to keep the gaps between both sides of the baffle body 1110 and the side walls of the air flow channel 708 uniform, so as to more stably realize the inhalation trigger function.

[0198] See Figure 13A and Figure 13B 、 Figures 15A to 22C , the powder container 7 further has a second cylindrical groove 712. The second cylindrical groove 712 is coaxially and oppositely arranged with the first cylindrical groove 716 and has a common bottom wall (not marked in the figure). The counting mechanism and the dose protection plate 10 are installed in the second cylindrical groove 712. See Figures 15A to 19B , the counting mechanism includes a counter base 21. The counter base 21 has a cylindrical shaft 2111. Both the dose protection plate 10 and the counter base 21 of the counting mechanism are installed in the second cylindrical groove 712 on the powder container 7. The counter base 21 axially limits the dose protection plate 10. The powder inhaler further includes a driving torsion spring 16 and a return torsion spring 15. The driving torsion spring 16 is sleeved on the cylindrical shaft 2111 of the counter base 21. A limiting groove 2109 is provided on the counter base 21. The fixed arm of the driving torsion spring 16 is fixed through the limiting groove 2109 on the counter base 21. The return torsion spring 15 is installed on the gear bracket 14.

[0199] See Figures 15A to 20, the dose protection plate 10 includes an annular body 1000, a shielding portion 1004, and a pressing member 1006. The pressing member 1006 of the dose protection plate 10 is disposed on the outer side surface of the annular body 1000. The shielding portion 1004 is connected to one end of the annular body 1000 and is spaced apart from the pressing member 1006. The shielding portion 1004 is used to shield or not shield the dose cup 902. The annular body 1000 is disposed in the second cylindrical groove 712 of the powder container 7, as Figure 18B shown. The annular body 1000 is used to accommodate the counting mechanism. The side wall of the second cylindrical groove 712 of the powder container 7 has a notch. The pressing member 1006 extends out of the second cylindrical groove 712 through the notch on the side wall of the second cylindrical groove 712 and can rotate back and forth within the notch. As Figure 20 shown, the surface of the pressing member 1006 away from the annular body 1000 includes a pressing arc surface 1002. When the inhalation trigger mechanism is in the initial state, that is, before being triggered or after the inhalation trigger mechanism is reset, the arc groove surface 1107 of the rotating member 1108 of the intake baffle 11 cooperates with the pressing arc surface 1002 of the dose protection plate 10 to achieve concentric arc surface pressing.

[0200] The shielding portion 1004 is connected to one end of the annular body 1000 and is used to shield or not shield the dose cup 902. As Figure 13B shown, an arc-shaped notch (not labeled in the figure) is provided on the common bottom wall of the powder container 7, so that the shielding portion 1004 of the dose protection plate 10 passes through the arc-shaped notch and enters the first cylindrical groove 716, and can rotate back and forth within the arc-shaped notch, so as to be located at the entrance 704 of the inhalation channel 706 and shield the dose cup 902 at this position before the inhalation trigger mechanism is triggered, and after the inhalation trigger mechanism is triggered, rotate within the arc-shaped notch to deviate from the entrance 704 of the inhalation channel 706 to not shield the dose cup 902, so that the powder in the dose cup 902 is exposed for easy inhalation by the user.

[0201] Specifically, referring to Figures 15A to 17B 、 Figure 20 , the pressing member 1006 includes a cylindrical convex surface 1001. The cylindrical convex surface 1001 is disposed on one side of the pressing arc surface 1002. As Figure 16A and Figure 16B shown, the driving arm of the driving torsion spring 16 of the powder inhaler acts on the cylindrical convex surface 1001. So that when the user's inhalation flow rate is higher than the working threshold and the intake baffle 11 rotates, after the pressing arc surface 1002 of the dose protection plate 10 is separated from the arc groove surface 1107 of the intake baffle 11, the dose protection plate 10 rotates under the action of the driving arm of the driving torsion spring 16, so that the shielding portion 1004 of the dose protection plate 10 changes from shielding the dose cup 902 of the powder metering wheel 9 to not shielding, so that the powder in the dose cup 902 of the powder metering wheel 9 is exposed to the air flow for the user to suck.

[0202] The movement mode of the inhalation trigger mechanism during the inhalation trigger process will be specifically introduced below.

[0203] Refer to Figure 9D and Figures 15A to 22C . Before the outer cover 4 is opened to the in-place position, as shown in Figure 15A , Figure 16A , Figure 17A and Figure 22A , the driving arm of the return torsion spring 15 acts on the cylinder 1102 of the intake baffle 11. The driving arm of the return torsion spring 15 presses against the intake baffle 11 to fit the front housing 1. The convex platform 1101 is embedded in the annular flange 111, and the intake baffle 11 does not rotate. The inhalation passage 706 cannot communicate with the outside atmosphere through the air flow passage 708. As shown in Figure 20 and Figure 15A , the driving arm of the driving torsion spring 16 acts on the cylindrical convex surface 1001 of the pressing member 1006 of the dose protection plate 10. At this time, the pressing arc surface 1002 of the pressing member 1006 of the dose protection plate 10 acts on the arc groove surface 1107 of the rotating member 1108 of the intake baffle 11 (as shown in Figure 16A ), achieving concentric arc surface pressing.

[0204] The guiding groove 1209 of the driving cam 12 is located on the surface of the body portion 1200 facing the gear 1203. The surface of the body portion 1200 facing away from the gear 1203 has a rib 1208. When the outer cover 4 is opened to the in-place position, that is, after the outer cover 4 rotates to the second position, the rib 1208 of the driving cam 12 presses the driving arm of the return torsion spring 15 away from the cylinder 1102 of the intake baffle 11 (as shown in Figure 17B ). The rib 1208 releases the limit of the return torsion spring 15 on the intake baffle 11 of the inhalation trigger mechanism. At this time, the intake baffle 11 is not affected by the pressing force of the return torsion spring 15, and only the pressing friction force of the pressing arc surface 1002 of the dose protection plate 10 on the arc groove surface 1107 of the intake baffle 11 remains. At the same time, after the outer cover 4 rotates to the second position, the dose cup 902 of the powder metering wheel 9 is delivered to the position of the inlet 704 of the inhalation passage 706, and the shielding portion 1004 of the dose protection plate 10 is located at the position of the inlet 704 of the inhalation passage 706 and shields the powder outlet of the dose cup 902.

[0205] After the outer cover 4 is opened in place and before the inhalation trigger mechanism is triggered, there is only the pressing friction force of the pressing arc surface 1002 of the dose protection plate 10 on the arc groove surface 1107 of the intake baffle 11, and the intake baffle 11 still does not rotate. When the user inhales and the flow rate of the user's inhalation airflow is greater than the working threshold, and the negative pressure in the inhalation channel 706 is greater than the threshold, the airflow thrust generated by the inhalation airflow acts on the intake baffle 11, overcoming the friction force of the pressing arc surface 1002 on the arc groove surface 1107, and the inhalation trigger mechanism is triggered, causing the intake baffle 11 to deflect and rotate. After the intake baffle 11 rotates, the arc groove surface 1107 of the intake baffle 11 rotates synchronously, and the pressing arc surface 1002 of the dose protection plate 10 disengages from the arc groove surface 1107 of the intake baffle 11 (as shown in Figure 16B ), the dose protection plate 10 rotates under the driving force of the driving torsion spring 16, and the shielding portion 1004 of the dose protection plate 10 rotates synchronously within the arc-shaped notch, causing the shielding portion 1004 of the dose protection plate 10 to deviate and not shield the powder outlet of the dose cup 902. At this time, the powder outlet of the dose cup 902 of the powder metering wheel 9 is exposed in the inhalation channel 706, and under the action of the user's inhalation airflow, the powder in the dose cup 902 flows through the inhalation channel 706 and the nozzle 101 and is inhaled by the user. In a preferred embodiment, the dose protection plate 10 rotates downward by 38 degrees under the driving force of the driving torsion spring 16, so that the powder outlet of the dose cup 902 communicates with the inhalation channel 706, and the powder in the dose cup 902 is exposed to the airflow and taken away.

[0206] See Figure 14B and Figure 20 , the dose protection plate 10 further includes a wedge-shaped column 1005. One end of the wedge-shaped column 1005 is connected to the annular body 1000 and is spaced from both the shielding portion 1004 and the pressing member 1006. The other end of the wedge-shaped column 1005 is used to cooperate with the driving spring arm 910 of the powder metering wheel 9, so that during the closing process of the outer cover 4, the driving spring arm 910 drives the dose protection plate 10 to rotate and reset through the wedge-shaped column 1005. The specific process and method of the driving spring arm 910 driving the dose protection plate 10 to rotate and reset through the wedge-shaped column 1005 will be described in detail in the subsequent process of the closing trigger function mechanism of the outer cover 4 resetting, and will not be elaborated here.

[0207] See Figure 20 , the dose protection plate 10 further includes a spring arm claw 1003. One end of the spring arm claw 1003 is connected to the annular body 1000. Specifically, one end of the spring arm claw 1003 is connected to the inner wall surface of the annular body 1000. The other end of the spring arm claw 1003 is used to drive the counting mechanism to count. The counting mechanism and the method and process of the spring arm claw 1003 driving the counting mechanism to count will be specifically introduced below.

[0208] Refer to Figures 24A to 25 ,Figure 24A is Figure 18A Schematic structural diagram of the units digit wheel of the provided counting mechanism at an angle Figure 24B is Figure 24A Schematic structural diagram of the units digit wheel at another angle provided Figure 25 is Figure 18A Schematic structural diagram of the tens digit wheel of the provided counting mechanism

[0209] (4) Counting mechanism

[0210] See Figure 18A and Figure 18B and Figures 22A to 25 , the counting mechanism includes a counter base 21, a tens digit wheel 22, a units digit wheel 23 and a counter intermediate gear 24. The counting mechanism realizes the counting function under the cooperation of the dose protection plate 10 and the powder container 7. Specifically, the tens digit wheel 22 is installed on the counter base 21. The counter base 21 has a cylindrical surface 2101, a snap 2102 and an outer arc boss 2108. The tens digit wheel 22 has an inner ring 2203 and an inner arc boss 2205. The cylindrical surface 2101 of the counter base 21 cooperates with the inner ring 2203 of the tens digit wheel 22 to realize coaxial rotation. The snap 2102 on the counter base 21 axially limits the tens digit wheel 22. The outer arc boss 2108 of the counter base 21 cooperates with the inner arc boss 2205 of the tens digit wheel 22 to realize the rotation limit of the tens digit wheel 22.

[0211] See Figure 4 and Figure 25 , a digital display window 201 is provided on the housing assembly. Specifically, the digital display window 201 is provided on the rear housing 2 of the housing assembly. The tens digit wheel 22 also has a full red warning feature 2201. When the full red warning feature 2201 of the tens digit wheel 22 is displayed in the digital display window 201 on the rear housing 2, the tens digit wheel 22 is limited and no longer rotates.

[0212] A first mounting hole 2103 is also provided on the counter base 21. The counter intermediate gear 24 is mounted on the first mounting hole 2103 on the counter base 21. The counter intermediate gear 24 is engaged with the gear feature of the tens digit wheel 22 through the gear feature to realize transmission.

[0213] The units digit wheel 23 has a second mounting hole 2303 and a toothed dial post 2301. A buckle post 2105 is provided on the counter base 21. The second mounting hole 2303 on the units digit wheel 23 cooperates with the buckle post 2105 on the counter base 21 to achieve coaxial mounting and axial positioning. The units digit wheel 23 has an annular guiding structure 2305 for mating installation with the tens digit wheel 22. The outer peripheral side of the units digit wheel 23 is printed with a first digit 2302, and the outer peripheral side of the tens digit wheel 22 is printed with a second digit 2202 for easy counting. The toothed dial post 2301 on the units digit wheel 23 cooperates with the counter intermediate gear 24. When the units digit wheel 23 rotates one full circle and jumps from the digit "0" to the digit "9", the toothed dial post 2301 of the units digit wheel 23 drives the counter intermediate gear 24 to rotate two teeth. At the same time, the tens digit wheel 22 meshes with the counter intermediate gear 24, and the tens digit wheel 22 synchronously rotates two teeth to achieve a digit jump.

[0214] See Figures 16A to 20 , the driving of the units digit wheel 23 is achieved by the reciprocating motion of the dose protection plate 10. Specifically, as Figure 24A shown, the units digit wheel 23 is provided with ratchet teeth 2304. See Figure 20 , the dose protection plate 10 has a spring arm claw 1003. One end of the spring arm claw 1003 is connected to the annular body 1000. The ratchet teeth 2304 on the units digit wheel 23 cooperate with the spring arm claw 1003 of the dose protection plate 10. Before the inhalation trigger mechanism is triggered, the spring arm claw 1003 hooks one of the ratchet teeth 2304 on the units digit wheel 23; when the inhalation trigger mechanism is triggered to move, the intake baffle 11 rotates and then triggers the dose protection plate 10 to rotate under the action of the driving arm of the driving torsion spring 16. The rotation of the dose protection plate 10 causes the spring arm claw 1003 to rotate synchronously. After the spring arm claw 1003 rotates, it hooks the next ratchet tooth 2304 on the units digit wheel 23; during the closing process of the outer cover 4, the inhalation trigger mechanism resets, and the dose protection plate 10 rotates in the reverse direction and returns to the original state before the inhalation trigger mechanism is not triggered. Since the spring arm claw 1003 of the dose protection plate 10 hooks the next ratchet tooth 2304 on the units digit wheel 23, during this process, the ratchet tooth 2304 hooked by the spring arm claw 1003 of the dose protection plate 10 also rotates, and the units digit wheel 23 rotates under the action of the spring arm claw 1003 to achieve a digit jump.

[0215] In a preferred embodiment, the units digit wheel 23 is provided with ten ratchet teeth 2304. When the inhalation trigger mechanism is triggered to move, it triggers the dose protection plate 10 to rotate 38 degrees, and the spring arm claw 1003 hooks the next ratchet tooth 2304. When the inhalation trigger mechanism resets, the dose protection plate 10 rotates back 38 degrees, and the units digit wheel 23 rotates 36 degrees under the action of the spring arm claw 1003 to achieve a digit jump.

[0216] Further, a limiting elastic arm 711 is also provided on the powder container 7. Specifically, as Figure 13B shown, the side surface of the second cylindrical groove 712 of the powder container 7 has a limiting elastic arm 711, and the limiting elastic arm 711 is used to limit the one-way rotation of the counting mechanism. The limiting elastic arm 711 provided on the powder container 7 cooperates with the ratchet teeth 2304 on the units digit wheel 23 to realize the one-way rotation of the units digit wheel 23. That is, when the dose protection plate 10 rotates downward, the arm claw 1003 on the dose protection plate 10 scratches the units digit wheel 23. Due to the action of the limiting elastic arm 711 on the ratchet teeth 2304 of the units digit wheel 23, the units digit wheel 23 will not rotate with the dose protection plate 10. When the dose protection plate 10 returns and rotates, the arm claw 1003 on the dose protection plate 10 pulls the units digit wheel 23 to rotate 36° to realize one-way decreasing counting. Through the above settings, it can effectively prevent the problem that when the dose protection plate 10 rotates downward, the arm claw 1003 drives the units digit wheel 23, resulting in abnormal operation of the counter.

[0217] For the convenience of understanding, the cooperation relationship of each functional mechanism will be introduced below in combination with the process of closing the cover, as well as how to trigger the counting mechanism to count and how to realize the reset of each functional mechanism during the process of closing the cover.

[0218] During the process of closing the outer cover 4, that is, when the outer cover 4 rotates reversely from the second position back to the first position, it drives the powder delivery mechanism and the air pressure mechanism to reset respectively, and triggers the intake baffle 11 to rotate reversely and reset, so that the powder inhaler returns to its original state; among them, the reset of the dose protection plate 10 drives the counter to realize the counting of one digit.

[0219] The angle of the outer cover 4 in the first position is defined as 0 degrees, and the angle of the outer cover 4 in the second position is greater than or equal to 120 degrees and less than or equal to 180 degrees. In one embodiment, the angle of the outer cover 4 in the second position is 150 degrees. During the process of closing the outer cover 4 (the process of the outer cover 4 returning from the second position to the first position), that is, during the process of the outer cover 4 reversing from 150 degrees to 0 degrees, first there is a reverse idle stroke. The outer cover 4 drives the drive cam 12 to also reverse an idle stroke. Preferably, the outer cover 4 first reverses an idle stroke of 62.5 degrees, and the corresponding drive cam 12 reverses an idle stroke of 75 degrees. That is, when the closing idle stroke of the outer cover 4 ends, the angle of the outer cover 4 is 87.5 degrees, and the angle of the drive cam 12 is 105 degrees. When the outer cover 4 reverses from 87.5 degrees to 0 degrees, the drive cam 12 drives the powder metering wheel 9 to rotate and reset. The powder metering wheel 9 rotates and resets from the fourth position to the third position. The dosing cup 902 of the powder metering wheel 9 rotates from the position corresponding to the inlet 704 of the inhalation channel 706 to the position corresponding to the powder outlet 713 of the powder container 7, thereby realizing the reset of the powder delivery mechanism. During this process, the drive cam 12 reverses from 105 degrees to 0 degrees. When the outer cover 4 returns to the first position, that is, after the closing of the cover is completed, the arc-shaped rib 405 on the outer cover 4 cooperates with the sound-emitting spring arm 108 on the front housing 1 to realize a sound prompt for the cover being closed in place, to prompt that the outer cover 4 is closed in place.

[0220] Since the outer cover 4 and the drive gear 5 are driven by gear meshing, there is a gear clearance, resulting in that the outer cover 4 cannot be closely attached to the front housing 1 after being closed. In order to eliminate the problem that the outer cover 4 cannot be closed with the front housing 1 due to the influence of the gear clearance after the outer cover 4 is closed, as Figure 8A and Figure 8B shown, a tightening spring arm 502 is provided on the drive gear 5. The tightening spring arm 502 is defined as the second tightening spring arm. A limiting boss 106 is provided on the front housing 1. The tightening spring arm 502 cooperates with the limiting boss 106 on the front housing 1 to realize tightening and closing, so that the outer cover 4 is closely attached to the front housing 1 to ensure that the cover is closed in place. At the same time, during the process of opening the outer cover 4, that is, during the process of the outer cover 4 rotating from the first position to the second position, initially it is an opening idle stroke. The outer cover 4 needs to overcome the resistance of the limiting boss 106 to the tightening spring arm 502 when rotating, so that the tightening spring arm 502 can cross over the limiting boss 106 to facilitate the rotation of the outer cover 4, which can prevent accidental opening of the cover due to non-human factors.

[0221] Further, referring to Figure 5A 、 Figure 6A and Figure 7A and Figure 7B, a limiting groove 403 is further provided on the connecting portion 406 with an arc-shaped rib 405 of the outer cover 4, and a limiting convex post 107 is further provided on the front housing 1. When the outer cover 4 is closed in place, that is, when the outer cover 4 is in the first position, the limiting convex post 107 is clamped in the limiting groove 403 to limit the outer cover 4 in the first position. Through the cooperation between the limiting groove 403 and the limiting convex post 107 of the front housing 1, the outer cover 4 and the front housing 1 are tightly closed, and a good fit is achieved between the outer cover 4 and the front housing 1, without gaps due to incomplete closing. At the same time, at the initial stage of the opening process of the outer cover 4, that is, during the opening idle stroke of the outer cover 4, it is also necessary to overcome the acting force of the limiting groove 403 on the limiting convex post 107 so that the limiting convex post 107 can be disengaged from the limiting groove 403 to facilitate the rotation of the outer cover 4, further preventing accidental opening due to non-human factors.

[0222] It can be understood that a limiting boss 106 and a tightening spring arm 502 are provided at the position corresponding to one of the connecting portions 406 of the outer cover 4, and a limiting groove 403 and a limiting convex post 107 are provided at the position corresponding to the other connecting portion 406. The closing of the outer cover 4 is limited on both opposite sides, so that when the outer cover 4 is in the first position, good fits can be achieved between both opposite sides of the outer cover 4 and the front housing 1, effectively avoiding problems such as incomplete closing of the outer cover 4 and the presence of a gap on one side while the other side is closed in place between the outer cover 4 and the front housing 1, and ensuring the consistency of the closed state.

[0223] During the closing process of the outer cover 4, since the tip of the convex rod 1704 of the airbag pressing member 17 is limited in the stop groove 1213, it is first necessary to drive the tip of the convex rod 1704 of the airbag pressing member 17 to disengage from the stop groove 1213, that is, it is necessary to overcome the resistance of the stop groove 1213 to the tip of the convex rod 1704 of the airbag pressing member 17. During this process, the outer cover 4 undergoes a first closing sub-idle stroke, and the outer cover 4 reverses from 150 degrees to 140 degrees, requiring a relatively large torque. Preferably, within the first closing sub-idle stroke, the torque of the outer cover 4 is 0.05 N·m. Driving the cam 12 to rotate enables the tip of the convex rod 1704 of the airbag pressing member 17 to disengage from the stop groove 1213 and abut against the second curved surface section 1212, which can effectively prevent accidental closing due to non-human factors.

[0224] During the process of the outer cover 4 reversing from 140 degrees to 87.5 degrees, the outer cover 4 drives the drive cam 12 to reverse to 105 degrees. During this process, the annular boss 1207 of the drive cam 12 does not contact the boss 905 of the powder metering wheel 9, and the powder metering wheel 9 does not rotate. The outer cover 4 performs the empty stroke of closing the second lid. Only the second drive cam 12 is reversing and resetting. The tip of the convex rod 1704 of the airbag pressing member 17 abuts against the second curved surface section 1212. Since the second curved surface is an arc surface, the airbag pressing member 17 does not move during this process and remains in the sixth position. During this process, it is not necessary to drive the powder metering wheel 9 to rotate, nor to drive the airbag pressing member 17 to reset. The torque required for the outer cover 4 during the empty stroke of closing the second lid is small and is a constant torque. Preferably, the torque of the outer cover 4 during the empty stroke of closing the second lid is 0 N·m, which accelerates the lid-closing process and increases the smoothness of lid closing.

[0225] When the outer cover 4 reverses to 87.5 degrees, the annular boss 1207 of the drive cam 12 begins to contact the boss 905 of the powder metering wheel 9. During the process of the outer cover 4 reversing from 87.5 degrees to 62.5 degrees, it drives the drive cam 12 to reverse from 105 degrees to 75 degrees. During this process, the outer cover 4 performs the load stroke of closing the first lid. The annular boss 1207 of the drive cam 12 cooperates with the boss 905 of the powder metering wheel 9 and drives the powder metering wheel 9 to reverse. The powder metering wheel 9 begins to rotate from the fourth position to the third position. During this process, only the powder metering wheel 9 is resetting, and the tip of the convex rod 1704 of the airbag pressing member 17 still abuts against the second curved surface section 1212, and the airbag pressing member 17 remains in the sixth position. Since the outer cover 4 needs to drive the powder metering wheel 9 to reverse and reset during the load stroke of closing the first lid, a large constant torque is required. Preferably, the torque of the outer cover 4 during the load stroke of closing the first lid is 0.1 N·m to ensure that the powder metering wheel 9 can be driven to reverse.

[0226] Further, during the process of closing the outer cover 4, in a preferred embodiment, when the outer cover 4 reverses from 62.5 degrees to 0 degrees, the drive cam 12 reverses from 75 degrees to 0 degrees. Through the cooperation of the first curved surface section 1211 of the cam curved surface 1202 on the drive cam 12 and the arc surface 1703 of the airbag pressing member 17, when the drive cam 12 reverses, the first curved surface section 1211 of the cam curved surface 1202 continuously lifts the airbag pressing member 17 until the arc surface 1703 of the airbag pressing member 17 falls into the arc-shaped groove 1201 of the drive cam 12, completing the reset of the air compression mechanism.

[0227] See Figures 21A to 21F, specifically, during the process of closing the outer cover 4, in a preferred embodiment, when the outer cover 4 rotates from 56 degrees to 25 degrees, the driving cam 12 rotates from 68 degrees to 30 degrees. During this process, the driving spring arm 910 on the powder metering wheel 9 cooperates with the wedge-shaped column 1005 of the dose protection plate 10 to drive the dose protection plate 10 to rotate and reset.

[0228] Specifically, during the process of the outer cover 4 rotating from 87.5 degrees to 56 degrees, refer to Figure 21A and Figure 21C , the driving spring arm 910 on the powder metering wheel 9 does not contact the wedge-shaped column 1005 of the dose protection plate 10. During this process, the dose protection plate 10 does not rotate. Refer to Figure 21B and Figure 21D , when the outer cover 4 rotates to 56 degrees, the driving spring arm 910 on the powder metering wheel 9 starts to contact the wedge-shaped column 1005 of the dose protection plate 10. During the process of the outer cover 4 rotating from 56 degrees to 25 degrees, the annular boss 1207 of the driving cam 12 contacts the boss 905 of the powder metering wheel 9. The reverse rotation of the driving cam 12 drives the reverse rotation of the powder metering wheel 9. Then, the force exerted by the driving spring arm 910 of the powder metering wheel 9 on the wedge-shaped column 1005 of the dose protection plate 10 drives the dose protection plate 10 to rotate 38 degrees in reverse, realizing the reset of the dose protection plate 10. During the process of the outer cover 4 rotating from 8 degrees to 0 degrees, the dose protection plate 10 has been reset and stops rotating. During this process, only the powder metering wheel 9 is still rotating in reverse. Refer to Figure 21E and Figure 21F , the driving spring arm 910 on the powder metering wheel 9 will pass over the wedge-shaped column 1005 of the dose protection plate 10. When the outer cover 4 rotates to 0 degrees, the powder metering wheel 9 is reset in place. The limit convex column 107 is clamped in the limit groove 403, and the pressing spring arm 502 acts on the limit boss 106 to ensure that the outer cover 4 is closed in place.

[0229] Before the outer cover 4 is closed in place, when the outer cover 4 is reversed by 12.5 degrees, at this time, the drive cam 12 is reversed by 15 degrees, and the rib 1208 on the drive cam 12 leaves the drive arm of the return torsion spring 15, and the drive arm of the return torsion spring 15 acts on the cylinder 1102 on the intake baffle 11 again, providing a return force for the intake baffle 11. Under the action of the return pressing force of the return torsion spring 15 on the intake baffle 11, the intake baffle 11 is reversed to complete the reset, and the pressing arc surface 1002 of the dose protection plate 10 acts on the arc groove surface 1107 of the intake baffle 11 again to achieve concentric arc surface pressing, and the dose protection plate 10 of the inhalation trigger mechanism is reset. When the outer cover 4 is reversed from 8 degrees to 0 degrees, the drive spring arm 910 on the drive powder metering wheel 9 passes over the wedge column 1005 on the dose protection plate 10. During this process, the outer cover 4 performs the third closing lid load stroke, the drive powder metering wheel 9 continues to reverse, while the dose protection plate 10 has been reset and no longer reverses. After the drive spring arm 910 on the drive powder metering wheel 9 passes over the wedge column 1005 on the dose protection plate 10, the drive spring arm 910 no longer applies a force to the wedge column 1005, and under the action of the drive torsion spring 16, the pressing arc surface 1002 of the dose protection plate 10 acts on the arc groove surface 1107 of the intake baffle 11 again to achieve concentric arc surface pressing. Ensure that after the inhalation trigger mechanism is reset, the drive powder metering wheel 9 is reset, to avoid the situation that the inhalation trigger mechanism is not reset in place.

[0230] During the process of the outer cover 4 being reversed from 62.5 degrees to 8 degrees, the reverse reset of the drive powder metering wheel 9 and the upward reset process of the airbag pressing part 17 need to be carried out simultaneously. During this process, the outer cover 4 performs the second closing lid load stroke, which requires a relatively large torque, and the torque of the second closing lid load stroke gradually increases. Preferably, within the second closing lid load stroke, the torque of the outer cover 4 gradually increases from 0.10 N·m to 0.20 N·m to ensure that the drive powder metering wheel 9 and the airbag pressing part 17 can be continuously reset. When the outer cover 4 rotates to 8 degrees, the airbag pressing part 17 is reset, that is, the airbag pressing part 17 is reset to the fifth position, and the tip of the convex rod 1704 of the airbag pressing part 17 sinks into the arc-shaped groove 1201 again to limit the airbag pressing part 17. During the process of the outer cover 4 being reversed from 8 degrees to 0 degrees, the outer cover 4 performs the third closing lid load stroke. During this process, it is necessary to overcome the resistance of the drive powder metering wheel 9 passing over the wedge column 1005. Preferably, the torque of the outer cover 4 within the third closing lid load stroke is 0.1 N·m until the lid is closed.

[0231] Specifically, within the first lid loading stroke and the second lid loading stroke of the outer lid 4, the powder metering wheel 9 drives the dose protection plate 10 to reset beyond the inlet 704 of the inhalation channel 706, compressing the driving torsion spring 16. Meanwhile, the reset torsion spring 15 drives the intake baffle 11 to reset and rotate to close the air flow channel 708. During the third lid loading stroke of the outer lid 4, the powder metering wheel 9 is decoupled from the dose protection plate 10. Specifically, the driving spring arm 910 of the powder metering wheel 9 is decoupled from the wedge-shaped column 1005 of the dose protection plate 10. The driving torsion spring 16 drives the dose protection plate 10 to rotate such that the shielding portion 1004 of the dose protection plate 10 rotates to the inlet 704 of the inhalation channel 706 and is limited at the position of the inlet 704 of the inhalation channel 706 by the intake baffle 11.

[0232] Refer to Figures 26 to 27 , Figure 26 is a schematic cross-sectional view of another embodiment of the powder inhaler provided by the present application, Figure 27 is a schematic cross-sectional view of yet another embodiment of the powder inhaler provided by the present application.

[0233] In Figure 1 the powder inhaler shown, a scheme of using a pneumatic mechanism and a large-sized powder outlet 713 is adopted for powder filling. In this embodiment, referring to Figure 9C and Figure 9D , the cross-sectional area of the powder outlet 713 of the powder container 7 is larger than the cross-sectional area of the dose cup 902 on the powder metering wheel 9. The size of the powder outlet 713 of the powder container 7 is larger, which can more efficiently achieve the pneumatic and powder filling processes. In other embodiments, the pneumatic method shown in Figure 9C may not be adopted.

[0234] For example, as shown in Figure 26 , in another embodiment, the powder inhaler may not be provided with a pneumatic mechanism, and a large-sized powder outlet 713 is directly adopted, such that the cross-sectional area of the powder outlet 713 of the powder container 7 is larger than the cross-sectional area of the dose cup 902 on the powder metering wheel 9. Since in the powder inhalers provided by the embodiments of the present application, during the process of opening and closing the lid of the outer lid 4, the axis of the housing assembly is always parallel to the vertical direction. Therefore, during the powder filling process, along the vertical direction, the powder outlet 713 at the bottom of the storage cavity 715 is always directly above the dose cup 902 of the powder metering wheel 9. By directly relying on the gravity of the powder in the storage cavity 715 of the powder container 7, the powder in the powder container 7 can also be filled into the dose cup 902 of the powder metering wheel 9 to achieve powder filling.

[0235] Or, as shown in Figure 27As shown, in another embodiment, a pneumatic mechanism may also be provided in the powder inhaler. However, the powder outlet 713 of the powder container 7 is set as a small-sized powder outlet 713. Specifically, the cross-sectional area of the powder outlet 713 of the powder container 7 is smaller than the cross-sectional area of the dose cup 902 on the powder metering wheel 9. The cross-sectional shape of the powder outlet 713 may be circular or other shapes, and the diameter of the powder outlet 713 is between 1 mm and 3 mm, so as to compact and fill the powder in the powder container 7 into the dose cup 902 on the powder metering wheel 9 through the pneumatic mechanism to achieve powder filling. The specific setting method of pneumatic pressing and powder filling can be designed or selected according to needs, and the present application does not limit this.

[0236] The following describes the specific operating state of the powder inhaler during the entire process from opening the cover to closing the cover, that is, when the outer cover 4 rotates from the first position (0 degrees) to the second position (150 degrees), the user inhales, and then the outer cover 4 rotates from the second position (150 degrees) to the first position (0 degrees).

[0237] (1) Opening the cover process

[0238] During the opening process of the outer cover 4, that is, during the process of the outer cover 4 rotating from the first position (0 degrees) to the second position (150 degrees), it successively includes an opening empty stroke, a pneumatic pressing process, and a powder delivery process in chronological order.

[0239] (1) Opening empty stroke

[0240] During the opening empty stroke, the outer cover 4 rotates from 0 degrees to 12 degrees. Among them, during the process of the outer cover 4 rotating from 0 degrees to 8 degrees, it is to prevent the outer cover 4 from being opened by non-human factors. During the process of the outer cover 4 rotating from 8 degrees to 12 degrees, it is to prevent accidental opening of the cover. Among them, when the outer cover 4 is in the first position, that is, 0 degrees, the outer cover 4 covers the mouthpiece 101.

[0241] (2) Pneumatic pressing process

[0242] During the pneumatic pressing process, the outer cover 4 rotates from 12 degrees to 62.5 degrees. Among them, during the process of the outer cover 4 rotating from 12 degrees to 55 degrees, the pneumatic pressing function is realized, so that the powder in the storage cavity 715 of the powder container 7 is compacted and filled into the dose cup 902 of the powder metering wheel 9. When the outer cover 4 rotates to 55 degrees, the pressure relief hole 1702 and the ventilation hole 709 are at the connection critical point. During the process of the outer cover 4 rotating from 55 degrees to 62.5 degrees, the pressure relief hole 1702 and the ventilation hole 709 are connected, realizing the pressure relief function, and releasing the compressed gas in the storage cavity 715 of the powder container 7 to normal pressure to avoid powder leakage when the powder metering wheel 9 rotates. During this process, it can be realized that the outer cover 4 is instantaneously opened when opening the cover, so that the pneumatic mechanism can rapidly press air and improve the pneumatic pressing effect.

[0243] (3) Powder delivery process

[0244] During the powder delivery process, the outer cover 4 rotates from 62.5 degrees to 150 degrees. The rotation of the outer cover 4 drives the rotation of the drive cam 12. The annular boss 1207 of the drive cam 12 is in contact and cooperation with the boss 905 of the powder metering wheel 9. The drive cam 12 rotates and drives the powder metering wheel 9 to rotate 105 degrees, so that the powder metering wheel 9 rotates from the third position to the fourth position. The dosing cup 902 of the powder metering wheel 9 rotates from corresponding to the powder outlet 713 of the storage cavity 715 of the powder container 7 to a position corresponding to the inlet 704 of the inhalation channel 706. When the outer cover 4 rotates to the second position, the arc-shaped rib 405 on the outer cover 4 cooperates with the sound-emitting spring arm 108 on the front housing 1 to achieve a sound prompt for the outer cover 4 to be opened in place, indicating that the outer cover 4 is opened in place.

[0245] (II) Inhalation trigger process

[0246] After the powder delivery process is completed, the dosing cup 902 of the powder metering wheel 9 is delivered to a position corresponding to the inlet 704 of the inhalation channel 706. The shielding portion 1004 of the dose protection plate 10 covers the dosing cup 902 of the powder metering wheel 9. The outer cover 4 is in the second position (150 degrees), and the outlet 102 of the mouthpiece 101 is exposed. When the user sucks at the position of the outlet 102 of the mouthpiece 101, when the flow rate of the user's inhalation air flow is greater than the working threshold (20 L / min to 25 L / min) and the negative pressure in the inhalation channel 706 is greater than the threshold, the inhalation trigger mechanism is triggered to act. The intake baffle 11 rotates, and the pressing arc surface 1002 of the dose protection plate 10 disengages from the arc groove surface 1107 of the intake baffle 11. The dose protection plate 10 rotates 38 degrees under the driving action of the driving torsion spring 16. The shielding portion 1004 of the dose protection plate 10 deviates and does not block the dosing cup 902 of the powder metering wheel 9. The dosing cup 902 is exposed at the inlet 704 of the inhalation channel 706. The dosing cup 902 is in communication with the inhalation channel 706, and the powder in the dosing cup 902 is exposed to the user's inhalation air flow and is taken away, completing the inhalation trigger process.

[0247] (III) Closing the cover process

[0248] After the inhalation trigger process is completed, the closing the cover process is carried out. During the closing the cover process, the outer cover 4 reversely resets from the second position (150 degrees) to the first position (0 degrees), and the outer cover 4 drives the air compression mechanism, the powder metering wheel 9, the dose protection plate 10 and the intake baffle 11 to reset during the closing the cover process. Specifically, the closing the cover process includes an empty stroke of closing the cover and a reset process of the functional mechanism.

[0249] (1) Empty stroke of closing the cover

[0250] During the empty stroke of closing the cover, the outer cover 4 rotates reversely from 150 degrees to 87.5 degrees (i.e., the outer cover 4 rotates reversely by 62.5 degrees). Among them, during the process of the outer cover 4 rotating from 150 degrees to 140 degrees, it is to prevent non-human factors from triggering the cover closing. In the later stage of the empty stroke of closing the cover, the outer cover 4 rotates from 140 degrees to 87.5 degrees.

[0251] (2) Function mechanism reset process

[0252] During the function mechanism reset process, the outer cover 4 rotates reversely from 87.5 degrees to 0 degrees. During this process, the powder metering wheel 9 continues to rotate reversely, and the powder metering wheel 9 resets from the fourth position to the third position. Among them, during the process of the outer cover 4 rotating reversely from 87.5 degrees to 62.5 degrees, only the powder metering wheel 9 rotates reversely; during the process of the outer cover 4 rotating reversely from 62.5 degrees to 8 degrees, the powder metering wheel 9 rotates reversely, and at the same time, the airbag pressing part 17 continuously pushes upward to reset the air compression mechanism; among them, during the process of the outer cover 4 rotating reversely from 56 degrees to 25 degrees, the driving spring arm 910 on the powder metering wheel 9 cooperates with the wedge column 1005 of the dose protection plate 10 to drive the dose protection plate 10 to rotate and reset. The pressing arc surface 1002 of the dose protection plate 10 acts on the arc groove surface 1107 of the air intake baffle 11 again to achieve concentric arc surface pressing, and the inhalation trigger mechanism is reset; during the process of the outer cover 4 rotating reversely from 8 degrees to 0 degrees, the air compression mechanism has been reset. At this time, the cover closing stroke overcomes the rotation resistance of the powder metering wheel 9. When the outer cover 4 is in the first position (0 degrees), the powder metering wheel 9 completes the reset. When the outer cover 4 returns to the first position, the arc-shaped rib 405 on the outer cover 4 cooperates with the sound spring arm 108 on the front shell 1 to realize the sound prompt for the cover closing in place, indicating that the outer cover 4 is closed in place.

[0253] As can be seen from the above, the outer cover 4 has different functions at different positions during the cover opening and closing process, such as the empty stroke or driving different function mechanisms to operate. According to the different functions of the outer cover 4 at different positions during the cover opening and closing process, the torque of the outer cover 4 during different strokes of the cover opening and closing process is designed in this application, making the cover opening and closing process of the powder inhaler more suitable for the user's usage habits.

[0254] Refer to Figures 28 to 30B , Figure 28 is Figure 1 the cyclic schematic diagram of the cover opening and closing process of the powder inhaler provided, Figure 29A is Figure 1 the curve schematic diagram of the cover opening angle and torque of an embodiment of the cover opening process of the powder inhaler provided, Figure 29B is Figure 1 the curve schematic diagram of the cover closing angle and torque of an embodiment of the cover closing process of the powder inhaler provided, Figure 30A is Figure 1 the curve schematic diagram of the cover opening angle and torque of another embodiment of the cover opening process of the powder inhaler provided,Figure 30B is Figure 1 A schematic diagram of the curve of the closing angle and torque of another embodiment of the closing process of the provided powder inhaler.

[0255] (1) Opening process

[0256] See Figure 28 and Figure 29A 、 Figure 29B In some embodiments, the stroke of the outer lid 4 rotating from the first position to the second position (i.e., the opening process) includes an opening idle stroke and an opening load stroke after the opening idle stroke. For example, the stroke of the outer lid 4 rotating from the first position to the second position only includes an opening idle stroke and an opening load stroke after the opening idle stroke.

[0257] During the opening idle stroke, the outer lid 4 does not trigger the action of the functional mechanism. During the opening load stroke, the outer lid 4 triggers the functional mechanism to deliver powder to the inhalation channel 706. Among them, the maximum torque of the outer lid 4 during the opening idle stroke is greater than the maximum torque during the opening load stroke, which can ensure the prevention of accidental opening due to non-human factors during the opening idle stroke. At the same time, it also ensures fast or smooth operation at different stages during the opening load stroke. Preferably, the torque of the outer lid 4 during the opening idle stroke is greater than or equal to 0.05 N·m and less than or equal to 0.3 N·m, and the torque of the outer lid 4 during the opening load stroke is greater than or equal to 0 N·m and less than or equal to 0.15 N·m.

[0258] Define the angle of the outer lid 4 in the first position as 0 degrees, and the angle of the outer lid 4 in the second position is greater than or equal to 120 degrees and less than or equal to 180 degrees. In a preferred embodiment, the angle of the outer lid 4 in the second position is 150 degrees. The critical angle between the opening idle stroke and the opening load stroke is greater than or equal to 10 degrees and less than or equal to 15 degrees. In a preferred embodiment, the critical angle between the opening idle stroke and the opening load stroke is specifically 12 degrees. That is, the outer lid 4 is in the opening idle stroke between 0 degrees and 12 degrees, and the outer lid 4 is in the opening load stroke between 12 degrees and 150 degrees.

[0259] (1) Opening idle stroke

[0260] The opening idle stroke includes a first opening sub-idle stroke and a second opening sub-idle stroke after the first opening sub-idle stroke. The critical angle between the first opening sub-idle stroke and the second opening sub-idle stroke is greater than or equal to 6 degrees and less than or equal to 10 degrees. As Figure 25 shown, in a preferred embodiment, the critical angle between the first opening sub-idle stroke and the second opening sub-idle stroke is 8 degrees. That is, the outer lid 4 is in the first opening sub-idle stroke between 0 degrees and 8 degrees, and the outer lid 4 is in the second opening sub-idle stroke between 8 degrees and 12 degrees.

[0261] Among them, the torque of the outer cover 4 during the first lid-opening idle stroke is greater than or equal to 0.02 N·m and less than or equal to 0.08 N·m, and the torque of the outer cover 4 during the second lid-opening idle stroke is greater than or equal to 0.1 N·m and less than or equal to 0.2 N·m. Preferably, the torque of the outer cover 4 during the first lid-opening idle stroke is 0.05 N·m, that is, the initial torque set between 0 degrees and 8 degrees of the outer cover 4 is 0.05 N·m, which can effectively prevent non-human factors from opening. The torque of the outer cover 4 during the second lid-opening idle stroke is 0.15 N·m, that is, the torque set between 8 degrees and 12 degrees of the outer cover 4 is 0.15 N·m. A relatively large lid-opening resistance is set between 8 degrees and 12 degrees of the outer cover 4 to prevent accidental lid opening.

[0262] (2) Lid-opening load stroke

[0263] The lid-opening load stroke includes the first lid-opening load stroke and the second lid-opening load stroke after the first lid-opening load stroke. The outer cover 4 triggers the air-pressing mechanism to press the powder from the storage cavity 715 into the dosing cup 902 during the first lid-opening load stroke, and the outer cover 4 triggers the dosing cup 902 to deliver the powder to the inhalation channel 706 during the second lid-opening load stroke.

[0264] Among them, the critical angle between the first lid-opening load stroke and the second lid-opening load stroke is greater than or equal to 60 degrees and less than or equal to 65 degrees. In a preferred embodiment, the critical angle between the first lid-opening load stroke and the second lid-opening load stroke is 62.5 degrees. That is, the first lid-opening load stroke of the outer cover 4 is between 12 degrees and 62.5 degrees, and the second lid-opening load stroke of the outer cover 4 is between 62.5 degrees and 150 degrees.

[0265] Among them, the torque of the outer cover 4 during the first lid-opening load stroke is constant and greater than or equal to 0 N·m and less than or equal to 0.05 N·m. Preferably, the torque of the outer cover 4 during the first lid-opening load stroke is 0 N·m, that is, the torque set between 12 degrees and 62.5 degrees of the outer cover 4 is 0 N·m. During the air-pressing process in the first lid-opening load stroke, setting the torque within this angle range to 0 N·m can achieve instantaneous opening during lid opening, enabling the air-pressing mechanism to rapidly press air and improving the air-pressing effect.

[0266] The torque of the outer cover 4 during the second lid-opening load stroke is constant, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m. Preferably, the torque of the outer cover 4 during the second lid-opening load stroke is 0.1 N·m, that is, the torque set between 62.5 degrees and 150 degrees of the outer cover 4 is 0.1 N·m. The outer cover 4 performs the powder delivery process during the second lid-opening load stroke. At this stage, the outer cover 4 needs to be opened smoothly and evenly. Setting the torque value in the second lid-opening load stroke to a constant torque of 0.1·m without sudden torque changes until the lid opening is completed ensures the powder delivery effect.

[0267] (2) Closing the cover process

[0268] Refer to Figure 28 and Figure 29A 、 Figure 29B In some embodiments, the stroke of the outer cover 4 rotating from the second position to the first position (i.e., the process of closing the cover) includes an empty stroke for closing the cover and a loaded stroke for closing the cover after the empty stroke for closing the cover. Among them, within the loaded stroke for closing the cover, the outer cover 4 triggers the reset of the functional mechanism.

[0269] Define the angle of the outer cover 4 when it is in the first position as 0 degrees, and the angle of the outer cover 4 when it is in the second position is greater than or equal to 120 degrees and less than or equal to 180 degrees. In a preferred embodiment, the angle of the outer cover 4 when it is in the second position is 150 degrees. In some embodiments, the critical angle between the empty stroke for closing the cover and the loaded stroke for closing the cover is greater than or equal to 80 degrees and less than or equal to 95 degrees. Preferably, the critical angle between the empty stroke for closing the cover and the loaded stroke for closing the cover is 87.5 degrees. That is, the empty stroke for closing the cover of the outer cover 4 is between 150 degrees and 87.5 degrees, and the loaded stroke for closing the cover of the outer cover 4 is between 87.5 degrees and 0 degrees.

[0270] (1) Empty stroke for closing the cover

[0271] The maximum torque of the outer cover 4 within the empty stroke for closing the cover is greater than or equal to 0.03 N·m and less than or equal to 0.07 N·m. Preferably, the maximum torque of the outer cover 4 within the empty stroke for closing the cover can prevent the cover from being closed accidentally due to non-human factors.

[0272] In some embodiments, the empty stroke for closing the cover includes a first sub-empty stroke for closing the cover and a second sub-empty stroke for closing the cover after the first sub-empty stroke for closing the cover. The critical angle between the first sub-empty stroke for closing the cover and the second sub-empty stroke for closing the cover is greater than or equal to 135 degrees and less than or equal to 145 degrees. Preferably, the critical angle between the first sub-empty stroke for closing the cover and the second sub-empty stroke for closing the cover is 140 degrees. That is, the first sub-empty stroke for closing the cover of the outer cover 4 is between 150 degrees and 140 degrees, and the second sub-empty stroke for closing the cover of the outer cover 4 is between 140 degrees and 87.5 degrees.

[0273] Among them, the torque of the outer cover 4 within the first sub-empty stroke for closing the cover is constant, which is greater than or equal to 0.03 N·m and less than or equal to 0.07 N·m. Preferably, the torque of the outer cover 4 within the first sub-empty stroke for closing the cover is 0.05 N·m, that is, the torque of the outer cover 4 between 150 degrees and 140 degrees is 0.05 N·m, which can prevent the cover from being closed accidentally due to non-human factors.

[0274] The torque of the outer cover 4 within the second sub-empty stroke for closing the cover is constant, which is less than or equal to 0.02 N·m. Preferably, the torque of the outer cover 4 within the second sub-empty stroke for closing the cover is 0 N·m, which can accelerate the process of closing the cover and increase the smoothness of closing the cover.

[0275] (2) Closing lid load stroke

[0276] The maximum torque of the outer lid 4 within the closing lid load stroke is greater than 0.05 N·m and less than or equal to 0.3 N·m. Specifically, the closing lid load stroke includes a first closing lid sub-load stroke, a second closing lid sub-load stroke, and a third closing lid sub-load stroke arranged in chronological order. The outer lid 4 only triggers the powder metering wheel 9 to reset and rotate within the first closing lid sub-load stroke. The outer lid 4 continues to trigger the powder metering wheel 9 to reset and rotate and triggers the air compression mechanism to complete reset within the second closing lid sub-load stroke. The outer lid 4 only triggers the powder metering wheel 9 to reset and rotate within the third closing lid sub-load stroke, and triggers the powder metering wheel 9 to reset and rotate to the first position. The outer lid 4 also triggers the dose protection plate 10 and the air intake baffle 11 to complete reset within the closing lid load stroke.

[0277] The critical angle between the first closing lid sub-load stroke and the second closing lid sub-load stroke is greater than or equal to 60 degrees and less than or equal to 65 degrees. Preferably, the critical angle between the first closing lid sub-load stroke and the second closing lid sub-load stroke is 62.5 degrees. That is, the outer lid 4 is within the first closing lid sub-load stroke from 87.5 degrees to 62.5 degrees. The critical angle between the second closing lid sub-load stroke and the third closing lid sub-load stroke is greater than or equal to 6 degrees and less than or equal to 10 degrees. Preferably, the critical angle between the second closing lid sub-load stroke and the third closing lid sub-load stroke is 8 degrees. That is, the outer lid 4 is within the second closing lid sub-load stroke from 62.5 degrees to 8 degrees, and the outer lid 4 is within the third closing lid sub-load stroke from 8 degrees to 0 degrees.

[0278] Among them, the torque of the outer lid 4 within the first closing lid sub-load stroke is constant, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m. Preferably, the torque of the outer lid 4 within the first closing lid sub-load stroke is 0.1 N·m. That is, the torque of the outer lid 4 from 87.5 degrees to 62.5 degrees is 0.1 N·m, and only the powder metering wheel 9 rotates within the first closing lid sub-load stroke.

[0279] The torque of the outer lid 4 within the second closing lid sub-load stroke gradually increases, and its maximum value is greater than or equal to 0.15 N·m and less than or equal to 0.3 N·m. Preferably, the torque of the outer lid 4 within the second closing lid sub-load stroke gradually increases from 0.10 N·m to 0.20 N·m. That is, the torque of the outer lid 4 from 62.5 degrees to 8 degrees gradually increases from 0.10 N·m to 0.20 N·m. The powder metering wheel 9 still rotates within the second closing lid sub-load stroke, and the airbag pressing part 17 is in the process of continuously resetting by rising.

[0280] The torque of the outer cover 4 is constant within the third closing cover load stroke, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m. Preferably, the torque of the outer cover 4 within the third closing cover load stroke is 0.1 N·m, that is, the torque of the outer cover 4 is 0.1 N·m between 8 degrees and 0 degrees. The airbag pressing part 17 has been reset within the third closing cover load stroke. At this time, the closing cover stroke overcomes the rotational resistance of the powder metering wheel 9 until the closing cover is completed.

[0281] See Figure 30A and Figure 30B , in another embodiment, during the opening and closing processes of the outer cover 4 of the powder inhaler, it can also be set according to the corresponding relationship between the opening and closing cover angles and the torque as shown in Figure 30A and Figure 30B . In this embodiment, the torque changes during the opening and closing processes have a ramp curve, with fewer torque mutations, which is more user-friendly.

[0282] Refer to Figures 31A to 31E , Figure 31A is Figure 1 the schematic diagram of the powder inhaler provided in a perspective view at an angle, Figure 31B is Figure 31A the schematic diagram of the powder inhaler provided in a state placed on a horizontal plane, Figure 31C is Figure 31A the schematic diagram of the powder inhaler provided in a handheld state, Figure 31D is Figure 31A the schematic diagram of the powder inhaler provided after opening the cover in a handheld state, Figure 31E is Figure 31A the schematic diagram of the powder inhaler provided in a mouth-sucking state.

[0283] See Figure 1 , Figure 5A , Figure 5B , Figure 31A and Figure 31B , the outer cover 4 of the powder inhaler includes two connecting parts 406 oppositely arranged along the first direction and a free end 407 located on one side of the two connecting parts 406 along the second direction. The first direction intersects with the second direction. The two connecting parts 406 are respectively rotatably connected to the opposite sides of the bottom end of the housing assembly and protrude from the bottom end of the housing assembly. The free end 407 and the two connecting parts 406 are used to support the housing assembly, so that the powder inhaler can be stably placed on a horizontal plane. The three support points of the two connecting parts 406 and one free end 407 can achieve stable placement and avoid tipping due to unstable placement of the powder inhaler.

[0284] The present invention can ensure that during the use and storage of the device, the powder container 7 is always above the powder metering wheel 9, preventing problems such as frequent movement of the powder in the powder container 7 caused by excessive changes in the position state of the device, which may lead to powder variation. For example, phenomena such as the effective components of the powder detaching from the carrier, the powder particles becoming smaller, and accumulation at the lower part of the small particles are avoided, ensuring that the powder in the powder container 7 of the powder inhaler remains in a relatively stable state throughout the entire service life cycle.

[0285] For example, as Figure 31B shown, when the bottom end of the powder inhaler is placed on a horizontal plane, the inclination angle of the axis of the housing assembly relative to the vertical direction is greater than or equal to 0 degrees and less than or equal to 15 degrees. Preferably, when the bottom end of the powder inhaler is placed on a horizontal plane, the inclination angle of the axis of the housing assembly relative to the vertical direction is 6 degrees, which can further ensure that the change in the position state of the device is small, and ensure that the powder in the powder container 7 remains in a relatively stable state when the powder inhaler is placed on a horizontal plane (i.e., in the storage state).

[0286] For example, as Figure 31C and Figure 31D shown, during the process of holding the powder inhaler to open and close the lid, the device is in a vertical state, and the axis of the housing assembly of the powder inhaler is parallel to the vertical direction, which is more convenient for the process of opening and closing the lid, and also makes the change in the position state of the device small, ensuring that the powder in the powder container 7 remains in a relatively stable state during the process of opening and closing the lid.

[0287] For example, as Figure 31E shown, during the user's mouth inhalation process, the inclination angle of the axis of the housing assembly of the powder inhaler relative to the vertical direction is greater than or equal to 0 degrees and less than or equal to 15 degrees. Preferably, during the user's mouth inhalation process, the inclination angle of the axis of the housing assembly of the powder inhaler relative to the vertical direction is 15 degrees, which not only ensures that the change in the position state of the powder inhaler is small during the mouth inhalation process and the powder in the powder container 7 remains in a relatively stable state, but also ensures the convenience of the user's suction at the outlet 102 of the mouthpiece 101.

[0288] The above are only embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. An intake baffle for a powder inhaler; characterized in that, Comprising: Baffle body; Wherein, a boss is provided on the first surface of the baffle body, and the outer peripheral side surface of the boss is spaced from the outer peripheral side surface of the baffle body.

2. The intake baffle according to claim 1, wherein: The boss covers the central area of the first surface of the baffle body.

3. The intake baffle according to claim 2, wherein Along the circumferential direction of the boss, the outer peripheral side surface of the boss is evenly spaced from the outer peripheral side surface of the baffle body; the portion of the first surface of the baffle body not covered by the boss forms an annular surface.

4. The intake baffle according to claim 1, wherein: The intake baffle further includes a rotating shaft provided at the first end of the baffle body; Along the direction from the first end of the baffle body to the opposite second end, the height of the boss gradually decreases, such that the top surface of the boss forms an inclined surface.

5. The intake baffle according to claim 1, wherein: The baffle body is recessed to form the boss.

6. The intake baffle according to claim 1, wherein: The intake baffle further includes a rotating shaft and a rotating member; the rotating shaft is provided at one end of the baffle body; the rotating member is connected to the free end of the rotating shaft and is spaced from the baffle body; Wherein, the first end of the rotating member has a curved surface.

7. The intake baffle according to claim 6, wherein: The second end of the rotating member, which is away from the surface of the baffle body, has a protruding cylinder.

8. The intake baffle according to claim 7, wherein: The number of the rotating shafts is two, which are respectively provided on the opposite sides of the baffle body, defined as the first rotating shaft and the second rotating shaft; the number of the rotating members is two, defined as the first rotating member and the second rotating member; The first rotating member is connected to the free end of the first rotating shaft, the first end of the first rotating member has a first curved surface, and the second end, which is away from the surface of the baffle body, has the protruding cylinder; The second rotating member is connected to the free end of the second rotating shaft, the first end of the second rotating member has a second curved surface, and the second end has an arc groove surface.

9. The intake baffle according to claim 6, wherein: The number of the rotating shafts is two, which are respectively provided on the opposite sides of the baffle body; one end of each rotating shaft is connected to the side surface of the baffle body; The side surface of the baffle body further has a shoulder surrounding the rotating shaft, and the shoulder is spaced from the rotating member.

10. A dose protection plate for use in a powder inhaler; characterized in that, Comprising: Annular body; Blocking portion, connected to one end of the annular body, for blocking or not blocking the dose cup of the powder inhaler.

11. The dose protection plate according to claim 10, wherein: The dose protection plate further includes a pressing member provided on the outer side surface of the annular body; the surface of the pressing member away from the annular body includes a pressing arc surface.

12. The dose protection plate according to claim 11, wherein: The pressing member includes a cylindrical convex surface provided on one side of the pressing arc surface.

13. The dose protection plate according to claim 10, wherein: The dose protection plate further comprises an elastic arm hook, one end of which is connected to the annular body.

14. The dose protection plate according to claim 10, characterized in that: The dose protection plate further includes a wedge-shaped column, one end of which is connected to the annular body.

15. An inspiration trigger mechanism, characterized in that, include: The air intake baffle according to any one of claims 1 to 9; and / or A dose protection plate as claimed in any one of claims 10 to 14.

16. A powder inhaler, characterized in that, include: A powder delivery mechanism, comprising a powder container and a powder metering wheel; the powder container has a storage chamber, an inhalation channel and an air flow channel; the inhalation channel is communicated with the air flow channel; the storage chamber is used to store powder, and the storage chamber has a powder outlet; the powder metering wheel is rotatably connected to the powder container; the powder metering wheel comprises a dosage cup; the dosage cup is used to receive the powder from the powder outlet and deliver the powder to the inlet of the inhalation channel; The inhalation trigger mechanism according to claim 15; wherein the air intake baffle is rotatably connected to the side wall of the air flow channel, and the first surface of the baffle body faces the outside of the port of the air flow channel; the dose protection plate is rotatably connected to the powder container; the air intake baffle is linked with the dose protection plate; Wherein, when the air inhalation trigger mechanism is in the initial state, the air inlet baffle blocks the air flow channel, and the inhalation channel is not connected to the outside atmosphere; the shielding portion shields the powder outlet of the dosage cup located at the entrance of the inhalation channel; When the negative pressure inside the suction channel is greater than a threshold value, the air intake baffle rotates to open the airflow channel and triggers the dose protection plate to rotate, so that the shielding portion deviates and does not block the powder outlet of the dose cup, and the airflow channel connects the outside atmosphere and the suction channel.

17. The powder inhaler according to claim 16, characterized in that, The powder inhaler further comprises: A housing assembly, comprising a front housing, the front housing having a suction nozzle, the suction nozzle being arranged corresponding to the suction channel and being connected to the suction channel; a side wall of the front housing having an air inlet and a grille, the grille protruding from an outer wall surface of the front housing; an inner wall surface of the front housing having an annular flange surrounding the air inlet, one end of the annular flange being arranged in the air flow channel, and the side wall of the front housing blocking a port of the air flow channel; The air intake baffle has the annular surface; when the air intake trigger mechanism is in the initial state, the boss is embedded in the annular flange, the inner peripheral side surface of the annular flange and the outer peripheral side surface of the boss are spaced and matched to form a first flow channel section, the end surface of the annular flange away from the end of the front shell body abuts against the annular surface and matches to form a second flow channel section, and the first flow channel section and the second flow channel section form an L-shaped intake flow channel; the compression arc surface cooperates with the arc groove surface of the air intake baffle to achieve concentric arc surface compression; When the negative pressure inside the suction channel is greater than a threshold value, the air intake baffle rotates to open the air flow channel, and the air flow channel is connected to the outside atmosphere through the air intake port.

18. The powder inhaler according to claim 17, characterized in that, The ratio of the distance between the top surface of the boss and the first surface of the baffle body to the thickness of the annular flange is 1:2-7:

1.

19. The powder inhaler according to claim 17, characterized in that, The side wall of the front housing is provided with at least two air inlets and at least one grille, and the grilles and the air inlets are arranged alternately; the annular flange is arranged around the air inlets and the grilles; The side wall of the airflow channel is connected to the side wall of the storage chamber, and one end of the side wall of the airflow channel connected to the side wall of the storage chamber is provided with a first guide hole and a second guide hole spaced apart from each other; the end of the suction channel close to the suction nozzle is provided with a first airflow inlet and a second airflow inlet spaced apart from each other, the first guide hole connects the airflow channel and the first airflow inlet, and the second guide hole connects the airflow channel and the second airflow inlet; The inner wall surface of the front shell and the outer wall surface of the suction channel are spaced apart to form a guide channel, and the guide channel connects the airflow channel with the first airflow inlet and the second airflow inlet.

20. The powder inhaler according to claim 17, characterized in that, The powder inhaler further comprises: an outer cover, rotatably connected to the housing assembly and capable of reciprocating between a first position and a second position; when the outer cover is configured to be in the first position, the outer cover covers the suction nozzle and the air inlet; when the outer cover is configured to be in the second position, the suction nozzle and the air inlet are exposed; a gas compression mechanism, disposed on the powder container, for pressing the powder in the powder container into the dosage cup; The powder metering wheel can rotate back and forth between a third position and a fourth position; when the powder metering wheel is configured to the third position, the dosage cup is arranged correspondingly to the powder outlet of the storage chamber; when the powder metering wheel is configured to the fourth position, the dosage cup is arranged correspondingly to the entrance of the inhalation channel; The outer cover is respectively linked with the powder delivery mechanism and the air compression mechanism; when the outer cover rotates from the first position to the second position, the air compression mechanism is first driven to press the powder in the storage chamber into the dosage cup, and then the powder metering wheel is driven to rotate from the third position to the fourth position; During the process of the outer cover reversing and resetting from the second position to the first position, the powder metering wheel, the dose protection plate and the air compression mechanism are respectively driven to reset, and the air intake baffle is triggered to reverse and reset.

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