Trigger mechanism and powder inhalation device

Abstract

This disclosure discloses a trigger mechanism. The trigger mechanism includes: a dose protection plate movable to and fro between a seventh position and an eighth position; a pawl comprising a first rotating shaft, wherein the pawl is rotatable around the first rotating shaft to and fro between a ninth position and a tenth position; an air inlet baffle comprising a second rotating shaft, where the second rotating shaft and the first rotating shaft are positioned across each other; the air inlet baffle being rotatable around the second rotating shaft between an eleventh position and a twelfth position; wherein when the air inlet baffle is in the eleventh position, the pawl is limited to the ninth position; and when the air inlet baffle is in the twelfth position, the pawl is rotatable from the ninth position to the tenth position and triggers movement of the dose protection plate from the seventh position to the eighth position.

Description

TRIGGER MECHANISM AND POWDER INHALATION DEVICECROSS REFERENCE OF RELATED APPLICATIONS

[0001] This application claims priority to CN Application No. 202410311876.1, filed March 18, 2024; CN Application No. 202410310848.8, filed March 18, 2024; CN Application No. 202410307932.4, filed March 18, 2024; CN Application No. 202410311864.9, filed March 18, 2024; CN Application No. 202410311470.3, filed March 18, 2024; CN Application No. 202410311455.9, filed March 18, 2024; CN Application No. 202410310836.5, filed March 18, 2024; and CN Application No. 202410310831.2, filed March 18, 2024, each of which is hereby incorporated by reference in its entirety for all purposes.TECHNICAL FIELD

[0002] This disclosure relates to the field of inhalation appliance technologies, and in particular, to a trigger mechanism and a powder inhalation device.BACKGROUND

[0003] A powder inhalation device generally stores powder through a powder container, and through a proper mechanical structure design, a dose of drug powder is placed in an airflow channel before each inhalation. A user sucks a suction nozzle of the device and inhales to generate an airflow. Under the action of the airflow, drug particles are carried and enter a respiratory system of the user through the airflow channel. A repository -type powder inhalation device has become a commonly used powder aerosol drug delivery device on the market due to a large powder loading dose and a high price-performance ratio.

[0004] However, in the existing powder inhalation device, in a process of inhaling by a user, airflow has a poor deagglomeration effect on the drug powder. As a result, utilization of the drug powder is low, and it is easy to cause waste of the drug powder.SUMMARY

[0005] This disclosure mainly provides a trigger mechanism and a powder inhalation device, so as to resolve problems that an existing powder inhalation device has an undesirabledeagglomeration effect and a low drug powder utilization rate. To reduce or eliminate the foregoing technical problem, a technical solution used in this disclosure is as follows.

[0006] In an aspect, a trigger mechanism is provided, including: a pawl comprising a first rotating shaft, wherein the pawl is rotatable around the first rotating shaft to and fro between a ninth position and a tenth position; an air inlet baffle comprising a second rotating shaft, wherein the second rotating shaft and the first rotating shaft are positioned across each other, the air inlet baffle being rotatable around the second rotating shaft between an eleventh position and a twelfth position; wherein when the air inlet baffle is in the eleventh position, the pawl is limited to the ninth position; and when the air inlet baffle is in the twelfth position, the pawl is rotatable from the ninth position to the tenth position and triggers movement of the dose protection plate from the seventh position to the eighth position.

[0007] The pawl further includes: a plate body, wherein the first rotating shaft is positioned substantially perpendicular to the plate body; and a first cantilever having a first end connected to the plate body and a second end provided with a hook.

[0008] The pawl further comprises a second cantilever having a first end connected to the plate body and a second end with a first butting portion; the air inlet baffle comprises a door plate connected to a first side of the second rotating shaft and a swing member connected to a second side of the second rotating shaft, wherein when the air inlet baffle is in the eleventh position, the swing member butts against the first butting portion of the second cantilever to limit the pawl to the ninth position, and wherein when the air inlet baffle is in the twelfth position, the swing member is separated from the first butting portion of the second cantilever to remove the limitation on the pawl; an end surface of the first butting portion that butts against the swing member is a butting arc surface, and an end surface of the swing member that butts against the first butting portion is a locking arc surface, and when the air inlet baffle is in the eleventh position, the butting arc surface butts against the locking arc surface to cause potential energy for rotation of the pawl from the ninth position to the tenth position to drive the door plate to press against a bracket to block a trigger air inlet channel of the bracket.

[0009] The butting arc surface and the locking arc surface are eccentrically circular arc surfaces.

[0010] A side surface of the swing member has a first bevel, wherein during rotation of the pawl from the ninth position to the tenth position, the first butting portion butts against the firstbevel of the swing member to drive the air inlet baffle to rotate from the twelfth position to the thirteenth position; and wherein when the pawl is in the tenth position, the first butting portion of the second cantilever limits the air inlet baffle to the thirteenth position.

[0011] The pawl further comprises a third cantilever having a first end connected to the plate body and a second end having with a second butting portion and the side surface of the swing member has a second bevel facing away from the first bevel, wherein in a process in which the pawl is reversely reset from the tenth position to the ninth position, the first butting portion of the second cantilever removes the thirteenth position limitation on the air inlet baffle, and the second butting portion applies a trigger force for reverse resetting to the air inlet baffle by butting against the second bevel of the swing member.

[0012] The swing member further includes a weight.

[0013] To resolve the foregoing technical problem, another technical solution used in this disclosure is as follows: A powder inhalation device is provided, including: a delivery mechanism, including a mounting base and a dose assembly; and a trigger mechanism, being any trigger mechanism described here, wherein when the dose protection plate is in the seventh position, a measuring cup of the dose assembly is covered; when the dose protection plate is in the eighth position, the measuring cup of the dose assembly is exposed to an airflow channel; and in a process in which the pawl rotates from the ninth position to the tenth position, the dose protection plate moves from the seventh position to the eighth position.

[0014] The powder inhalation device further comprises: an air pressing mechanism comprising a connecting rod movable between a third position and a fourth position, the connecting rod comprising a counting dial block; and the pawl further comprises a fourth cantilever having a first end connected to the plate body and a free second end; wherein when the connecting rod is in the third position, the counting dial block butts against the free second end of the fourth cantilever to limit the pawl to the ninth position; the pawl has the ninth position limitation removed when the connecting rod moves from the third position to the fourth position; and when the connecting rod performs a reset movement from the fourth position to the third position, the counting dial block butts against the free end of the fourth cantilever, to drive the pawl to perform reset rotation from the tenth position to the ninth position.

[0015] When the connecting rod is in the third position and the counting dial block is limiting the pawl to the ninth position, the pawl is spaced apart from the air inlet baffle; and after the connecting rod moves from the third position to the fourth position and the pawl has the ninth position limitation removed, the butting arc surface of the pawl butts against a locking arc surface of the air inlet baffle.

[0016] The counting dial block is a stepped structure comprising a first step surface and a second step surface, the second step surface being positioned on a side of the first step surface proximate to the first rotating shaft of the pawl; the free end of the fourth cantilever is a step structure comprising a third step surface and a fourth step surface, the fourth step surface being positioned on a side of the third step surface proximate to the first rotating shaft; when the connecting rod is in the third position, the first step surface is spaced apart from the third step surface and the second step surface is in contact with the fourth step surface; when the connecting rod moves from the third position to the fourth position, the second step surface is separated from the fourth step surface to remove the ninth position limitation on the pawl; after the pawl rotates from the ninth position to the tenth position, the first step surface is in contact with the third step surface and the second step surface is spaced apart from the fourth step surface; and when the connecting rod performs a reset movement from the fourth position to the third position, the first step surface is separated from the third step surface and the second step surface is in contact with the fourth step surface.

[0017] In some instances, the foregoing arrangement can resolve the problems that existing powder inhalation devices have with undesirable powder deagglomeration effects and a low drug powder utilization rates.BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To describe the technical solutions of the embodiments of this disclosure or the existing technology more clearly, the following briefly describes the accompanying drawings required for describing the embodiments or the existing technology. Apparently, the accompanying drawings in the following description show only some embodiments of this disclosure, and a person of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts.

[0019] FIG. 1 is a schematic structural diagram of a powder inhalation device according to this disclosure in a state;

[0020] FIG. 2 is a schematic structural diagram of a powder inhalation device according to this disclosure in another state;

[0021] FIG. 3 is a schematic cross-sectional view of the powder inhalation device provided in FIG. 1;

[0022] FIG. 4A is a schematic cross-sectional view of the powder inhalation device provided in FIG. 2;

[0023] FIG. 4B is a partially enlarged schematic diagram of the powder inhalation device provided in FIG. 4A;

[0024] FIG. 4C is a partially enlarged schematic diagram of an airflow channel of the powder inhalation device provided in FIG. 4A;

[0025] FIG. 5 is a schematic structural diagram of the powder inhalation device provided in FIG. 1 with an outer cover removed;

[0026] FIG. 6 is a schematic structural diagram of the powder inhalation device provided in FIG. 1 with a housing removed from an angle;

[0027] FIG. 7A is a schematic structural diagram of an outer cover of the powder inhalation device provided in FIG. 1;

[0028] FIG. 7B is a partially enlarged schematic diagram of the outer cover provided in FIG. 7A;

[0029] FIG. 8 is a schematic structural diagram of an air pressing mechanism of the powder inhalation device provided in FIG. 1;

[0030] FIG. 9 is a schematic cross-sectional view of the air pressing mechanism provided in FIG. 8;

[0031] FIG. 10 is a schematic structural diagram of a connecting rod of the air pressing mechanism provided in FIG. 8;

[0032] FIG. 11 A is a schematic structural diagram of a powder container of the air pressing mechanism provided in FIG. 8 from an angle;

[0033] FIG. 1 IB is a schematic structural diagram of the powder container provided in FIG. 11 A from another angle;

[0034] FIG. 12 is a schematic cross-sectional view of the powder container provided in FIG. 11 A;

[0035] FIG. 13 A is a schematic diagram of an assembly structure of a delivery mechanism and a connecting rod of the powder inhalation device provided in FIG. 1 in a state;

[0036] FIG. 13B is a schematic cross-sectional view of an assembly structure of the delivery mechanism and the connecting rod provided in FIG. 13 A;

[0037] FIG. 13C is a partially enlarged schematic diagram of FIG. 13B;

[0038] FIG. 14A is a schematic structural diagram of a dose assembly of the delivery mechanism provided in FIG. 13 A;

[0039] FIG. 14B is a schematic cross-sectional view of the dose assembly provided in FIG. 14 A;

[0040] FIG. 15A is a schematic structural diagram of a slider of the dose assembly provided in FIG. 14A from an angle;

[0041] FIG. 15B is a schematic structural diagram of the slider provided in FIG. 15A from another angle;

[0042] FIG. 16A is a schematic structural diagram of a dose plate of the dose assembly provided in FIG. 14A from an angle;

[0043] FIG. 16B is a schematic structural diagram of the dose plate provided in FIG. 16A from another angle;

[0044] FIG. 17A is a schematic structural diagram of a mounting base of a delivery mechanism of the powder inhalation device provided in FIG. 1 in a state from an angle;

[0045] FIG. 17B is a schematic structural diagram of the mounting base provided in FIG. 17A from another angle;

[0046] FIG. 17C is a schematic structural diagram of the mounting base provided in FIG. 17A from still another angle;

[0047] FIG. 17D is a partially enlarged schematic diagram of the mounting base provided in FIG. 17C;

[0048] FIG. 17E is a schematic structural diagram of a mounting base of a delivery mechanism of the powder inhalation device provided in FIG. 1 in another state from an angle;

[0049] FIG. 17F is a partially enlarged schematic diagram of the mounting base provided in FIG. 17E;

[0050] FIG. 18A is a schematic structural diagram of assembling a delivery mechanism and a connecting rod of the powder inhalation device provided in FIG. 1 in another state;

[0051] FIG. 18B is a schematic cross-sectional view of an assembly structure of the delivery mechanism and the connecting rod provided in FIG. 18 A;

[0052] FIG. 19A is a schematic structural diagram of assembling a delivery mechanism and a connecting rod of the powder inhalation device provided in FIG. 1 in still another state;

[0053] FIG. 19B is a schematic cross-sectional view of an assembly structure of the delivery mechanism and the connecting rod provided in FIG. 19A;

[0054] FIG. 20A is a schematic structural diagram of assembling a dose assembly and a connecting rod of the powder inhalation device provided in FIG. 1 in a state;

[0055] FIG. 20B is a partially enlarged schematic diagram of FIG. 20A;

[0056] FIG. 21A is a schematic structural diagram of assembling a dose assembly and a connecting rod of the powder inhalation device provided in FIG. 1 in another state;

[0057] FIG. 21B is a partially enlarged schematic diagram of FIG. 21A;

[0058] FIG. 22A is a schematic diagram of an assembly structure of a powder container, a dose protection plate, and a dose assembly of the powder inhalation device provided in FIG. 1 in a state;

[0059] FIG. 22B is a schematic cross-sectional view of FIG. 22A;

[0060] FIG. 23 is a schematic cross-sectional view of a powder container, a dose protection plate, and a dose assembly of the powder inhalation device provided in FIG. 1 in still another state;

[0061] FIG. 24A is a schematic diagram of an assembly structure of a powder container, a dose protection plate, and a dose assembly of the powder inhalation device provided in FIG. 1 in another state;

[0062] FIG. 24B is a schematic cross-sectional view of FIG. 24A;

[0063] FIG. 25 is a schematic structural diagram of a trigger mechanism of a powder inhalation device according to this disclosure in a state;

[0064] FIG. 26A is a schematic structural diagram of a trigger mechanism of a powder inhalation device according to this disclosure in another state;

[0065] FIG. 26B is a partially enlarged schematic diagram of FIG. 26A;

[0066] FIG. 27A is a schematic structural diagram of a trigger mechanism of a powder inhalation device according to this disclosure in another state;

[0067] FIG. 27B is a partially enlarged schematic diagram of FIG. 27A;

[0068] FIG. 28 is a schematic structural diagram of a trigger mechanism of a powder inhalation device according to this disclosure in another state;

[0069] FIG. 29A is a schematic structural diagram of a trigger mechanism of a powder inhalation device according to this disclosure in another state;

[0070] FIG. 29B is a partially enlarged schematic diagram of FIG. 29A;

[0071] FIG. 30A is a schematic diagram of an assembly structure of a pawl and a mounting base of a powder inhalation device according to this disclosure in a state;

[0072] FIG. 30B is a partially enlarged schematic diagram of FIG. 30A;

[0073] FIG. 31A is a schematic diagram of an assembly structure of a pawl and a mounting base of a powder inhalation device according to this disclosure in another state;

[0074] FIG. 3 IB is a partially enlarged schematic diagram of FIG. 31 A;

[0075] FIG. 32A is a schematic structural diagram of a pawl of the trigger mechanism provided in FIG. 25 from an angle;

[0076] FIG. 32B is a schematic structural diagram of the pawl provided in FIG. 32A from another angle;

[0077] FIG. 33A is a schematic structural diagram of an air inlet baffle of the trigger mechanism provided in FIG. 25 from an angle in an implementation;

[0078] FIG. 33B is a schematic structural diagram of the air inlet baffle provided in FIG. 33 A from another angle;

[0079] FIG. 33C is a schematic structural diagram of an air inlet baffle of the trigger mechanism provided in FIG. 25 from an angle in another implementation;

[0080] FIG. 34A is a schematic structural diagram of a bracket of the trigger mechanism provided in FIG. 25 from an angle;

[0081] FIG. 34B is a schematic structural diagram of the bracket provided in FIG. 34A from another angle;

[0082] FIG. 35 A is a schematic diagram of an assembly structure of an air inlet baffle and a bracket of the trigger mechanism provided in FIG. 25 in a state from an angle in an implementation;

[0083] FIG. 35B is a schematic cross-sectional view of assembling the air inlet baffle and the bracket provided in FIG. 35 A;

[0084] FIG. 35C is a schematic cross-sectional view of assembling an air inlet baffle and a bracket of the trigger mechanism provided in FIG. 25 in another implementation;

[0085] FIG. 36 is a schematic diagram of an assembly structure of an air inlet baffle and a bracket of the trigger mechanism provided in FIG. 25 in another state from an angle;

[0086] FIG. 37 is a schematic diagram of an assembly structure of an air inlet baffle and a bracket of the trigger mechanism provided in FIG. 25 in still another state from an angle;

[0087] FIG. 38 is a schematic structural diagram of a dose protection plate of the trigger mechanism provided in FIG. 25;

[0088] FIG. 39A is a schematic diagram of an assembly structure of the dose protection plate provided in FIG. 38 and a delivery mechanism in a state;

[0089] FIG. 39B is a schematic diagram of an assembly structure of the dose protection plate provided in FIG. 38 and a delivery mechanism in another state;

[0090] FIG. 40A is a schematic diagram of an assembly structure of a pawl and a connecting rod of a powder inhalation device according to this disclosure in a state;

[0091] FIG. 40B is a schematic diagram of an assembly structure of a pawl and a connecting rod of a powder inhalation device according to this disclosure in another state;

[0092] FIG. 40C is a schematic diagram of an assembly structure of a pawl and a connecting rod of a powder inhalation device according to this disclosure in another state;

[0093] FIG. 40D is a schematic diagram of an assembly structure of a pawl and a connecting rod of a powder inhalation device according to this disclosure in another state;

[0094] FIG. 41 is a schematic structural diagram of a lower housing of the powder inhalation device provided in FIG. 1;

[0095] FIG. 42A is a schematic structural diagram of a deagglomeration mechanism of a powder inhalation device according to this disclosure in an embodiment;

[0096] FIG. 42B is a schematic cross-sectional view of the deagglomeration mechanism provided in FIG. 42A;

[0097] FIG. 43 is a schematic structural diagram of a swirling member of the deagglomeration mechanism provided in FIG. 42A;

[0098] FIG. 44A is a schematic structural diagram of a flow guide member of the deagglomeration mechanism provided in FIG. 42A;

[0099] FIG. 44B is a schematic cross-sectional view of the flow guide member provided in FIG. 44A;

[0100] FIG. 45 is a schematic structural diagram of a deagglomeration mechanism of a powder inhalation device according to this disclosure in another embodiment;

[0101] FIG. 46 is a schematic structural diagram of a swirling member of the deagglomeration mechanism provided in FIG. 45;

[0102] FIG. 47 is a schematic structural diagram of a flow guide member of the deagglomeration mechanism provided in FIG. 45;

[0103] FIG. 48 is a diagram of aerodynamic particle size distribution of first powder in a powder inhalation device;

[0104] FIG. 49 is a diagram of aerodynamic particle size distribution of second powder in a powder inhalation device;

[0105] FIG. 50A is a schematic structural diagram of a counting mechanism of the powder inhalation device provided in FIG. 1;

[0106] FIG. 50B is a schematic diagram of an exploded structure of the counting mechanism provided in FIG. 50A;

[0107] FIG. 51 is a schematic structural diagram of a ones counting wheel of the counting mechanism provided in FIG. 50 A;

[0108] FIG. 52 is a schematic structural diagram of a counter base of the counting mechanism provided in FIG. 50A; and

[0109] FIG. 53 is a schematic structural diagram of a tens counting wheel of the counting mechanism provided in FIG. 50 A.

[0110] Reference numerals: powder inhalation device 100; housing 1; upper housing 11; lower housing 12; rotating shaft 121; digit display window 122; suction nozzle 13; external air inlet 14; grille 15; outer cover 2; cover body 21; mounting portion 211; shaft hole 212; sealing groove 213; cam 22; plane segment 221; first circular arc surface segment 222; limiting bump 223; second circular arc surface segment 224; sealing ring 3; powder container 41; storage cavity 411; air pressing port 412; powder exit 413; pressure relief hole 414; receiving cavity 415; airway groove 416; air inlet port 417; protruding portion 418; third receiving groove 419; mounting post 410; airflow channel QI; connecting rod 42; butting end 421; protrudingstructure 422; guide rib 423; counting dial block 424; first step surface 425; second step surface 426; pressing plate 43; air capsule 44; compression spring 45; waterproof breathable film 46; mounting base 51; guide groove 512; snap-fit portion 513; sliding groove 514; first side surface 515; second side surface 516; first avoidance groove 517; powder inlet 518; pressure relief opening 519; port 5191; dose assembly 52; slider 521; first elastic arm snap 524; first surface 526; second surface 527; first limiting wall 528; second limiting wall 529; first receiving groove 530; second avoidance groove 532; resetting convex post 533; thickened portion 534; squeezing elastic arm 535; third avoidance groove 537; second elastic arm snap 538; convex rib 539; first elastic member 536; dose plate 522; second receiving groove 531; measuring cup 523; fifth elastic member 525; dose protection plate 61; first extension portion 611; second extension portion 612; pawl 62; first rotating shaft 621; plate body 622; first cantilever 623; hook 6231; second cantilever 624; first butting portion 6241; butting arc surface 6242; third cantilever 627; second butting portion 628; pressing block 629; first limiting block 620; second limiting block 625; third limiting block 6221; fourth cantilever 6222; third step surface 601; fourth step surface 602; air inlet baffle 63; second rotating shaft 631; door plate 632; swing member 633; connecting portion 634; bent portion 635; blocking portion 636; first arc surface 637; weight 638; locking arc surface 639; first bevel 6331; second bevel 6332; first separation portion 630; reinforcing portion 650; bracket 64; trigger air inlet channel 641; air inlet 642; first side wall 643; second side wall 644; third side wall 645; fourth side wall 646; first air inlet groove 647; second air inlet groove 648; second arc surface 649; second separation portion 640; second elastic member 65; third elastic member 66; fourth elastic member 67; swirling member 71; swirling groove 711; first fin 712; second fin 713; first tangential air inlet groove 714; second tangential air inlet groove 715; mixing groove 716; first tangential air inlet 717; second tangential air inlet 718; cylindrical protrusion 719; inclined flow guide rib 710; baffle 78; flow guide member 72; powder outlet channel 721; plate-shaped portion 722; inclined flow guide convex rib 723; flow guide bevel 724; connecting rib 725; swirling cavity 73; powder outlet 74; first tangential air inlet channel 75; second tangential air inlet channel 76; mixing cavity 77; counter base 81; first mounting groove 811; second mounting groove 812; third mounting groove 813; buckling post 814; limiting elastic arm 815; ones counting wheel 82; toothed dial post 822; tens counting wheel 83; mounting hole 831; counter intermediate gear 84.DETAILED DESCRIPTION

[0111] The technical solutions in embodiments of this disclosure are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of this disclosure. Apparently, the described embodiments are merely some rather than all of the embodiments of this disclosure. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of this disclosure without creative efforts shall fall within the protection scope of this disclosure.

[0112] In the embodiments of this disclosure, terms "first", "second", and "third" are used merely for the purpose of description, and shall not be construed as indicating or implying relative importance or implying a quantity of indicated technical features. Therefore, a feature restricted by "first", "second", or "third" may explicitly indicate or implicitly include at least one such feature. In description of this disclosure, "multiple" means at least two, such as two and three unless it is specifically defined otherwise. In addition, terminologies "include", "have", and any variations thereof are intended to indicate non-exclusive inclusion. For example, a process, a method, a system, a product, or a device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes an unlisted step or unit, or optionally further includes another inherent step or unit of the process, the method, the product, or the device.

[0113] Embodiment mentioned in the specification means that particular features, structures, or characteristics described with reference to the embodiment may be included in at least one embodiment of this disclosure. The term appearing at different positions of the specification may not refer to the same embodiment or an independent or alternative embodiment that is mutually exclusive with another embodiment. A person skilled in the art explicitly or implicitly understands that the embodiments described in the specification may be combined with other embodiments.

[0114] Referring to FIG. 1 to FIG. 7B, FIG. 1 is a schematic structural diagram of a powder inhalation device according to this disclosure in a state, FIG. 2 is a schematic structural diagram of a powder inhalation device according to this disclosure in another state, FIG. 3 is a schematic cross-sectional view of the powder inhalation device provided in FIG. 1, FIG. 4A is a schematic cross-sectional view of the powder inhalation device provided in FIG. 2, FIG. 4B is a partially enlarged schematic diagram of the powder inhalation device provided in FIG. 4A, FIG. 4C is a partially enlarged schematic diagram of an airflow channel of the powder inhalation device provided in FIG. 4A, FIG. 5 is a schematic structural diagram of the powder inhalation deviceprovided in FIG. 1 with an outer cover removed, FIG. 6 is a schematic structural diagram of the powder inhalation device provided in FIG. 1 with a housing removed from an angle, FIG. 7A is a schematic structural diagram of an outer cover of the powder inhalation device provided in FIG. 1, and FIG. 7B is a partially enlarged schematic diagram of the outer cover provided in FIG. 7A.

[0115] Referring to FIG. 1 to FIG. 7B, this disclosure provides a powder inhalation device 100. The powder inhalation device 100 includes a housing 1, functional mechanisms, and an outer cover 2. The functional mechanisms are positioned in the housing 1. The outer cover 2 is rotatably connected to the housing 1, and can be limited to rotate to and fro between a first position and a second position. Specifically, the housing 1 includes a suction nozzle 13. When the outer cover 2 is in the first position, the outer cover 2 is in a closed state, and the outer cover 2 blocks the suction nozzle 13. When the outer cover 2 is in the second position, the outer cover 2 is in a state of opening in place, the outer cover 2 does not block the suction nozzle 13, and the suction nozzle 13 is exposed. The outer cover 2 is linked to and cooperates with the functional mechanisms, and a linked action of the functional mechanisms is implemented through to-and-fro rotation of the outer cover 2 between the first position and the second position, so that the powder inhalation device 100 implements a function of dispensing powder such as drug powder. The to-and-fro rotation in this disclosure refers to to-and-fro rotation based on a repeated path, and directions of the two times of rotation are opposite, for example, rotating clockwise from the first position to the second position, and then rotating counterclockwise from the second position back to the first position.

[0116] Specifically, referring to FIG. 1 to FIG. 5, the housing 1 includes an upper housing 11 and a lower housing 12. The upper housing 11 and the lower housing 12 are connected to each other and cooperate to form a receiving space. The functional mechanisms are positioned in the receiving space. The outer cover 2 is rotatably connected to the lower housing 12, and therefore can rotate to and fro between the first position and the second position, to implement a cover opening process and a cover closing process.

[0117] The outer cover 2 may be rotatably connected to the lower housing 12 in a manner of rotating through a rotating shaft 121 or an arc-shaped sliding rail. The upper housing 11, the lower housing 12, and the outer cover 2 are not limited in shape and structure, and may be made of a material such as metal or plastic.

[0118] Referring to FIG. 7A and FIG. 7B, the outer cover 2 includes a cover body 21 and a cam 22. The cover body 21 and the cam 22 may be fixedly connected by welding, gluing, or the like, or may be integrally formed. Specifically, the cover body 21 includes two mounting portions 211 oppositely positioned in a first direction Al. In an implementation, two cams 22 are positioned on inner surfaces of the two mounting portions 211 in a one-to-one correspondence, and the cams 22 and the cover body 21 are integrally formed. Two opposite sides at the bottom of the lower housing 12 are each provided with a rotating shaft 121 (as shown in FIG. 5), the two mounting portions 211 are each provided with a shaft hole 212, the shaft hole 212 runs through the mounting portion 211 and the corresponding cam 22, and the two mounting portions 211 of the outer cover 2 are assembled and connected to the lower housing 12 through cooperation between the rotating shafts 121 and the shaft holes 212, thereby implementing the rotary connection between the outer cover 2 and the housing 1. Specifically, the center of the cam 22 is positioned eccentric to the shaft hole 212.

[0119] As shown in FIG. 1 and FIG. 2, the powder inhalation device 100 further includes a sealing ring 3. Specifically, an outer side surface of the mounting portion 211 of the outer cover 2 is provided with a sealing groove 213 (as shown in FIG. 7A), the shaft hole 212 of the mounting portion 211 is provided on a bottom wall of the sealing groove 213, and the sealing ring 3 is correspondingly embedded in the sealing groove 213 to perform sealing, thereby ensuring consistency of an airway and consistency of resistance to inhalation of the powder inhalation device 100, and preventing air from entering the housing 1 from a connection position between the shaft hole 212 of the mounting portion 211 of the outer cover 2 and the rotating shaft 121 of the lower housing 12.

[0120] The functional mechanisms include an air pressing mechanism, a delivery mechanism, a trigger mechanism, a deagglomeration mechanism, and a counting mechanism. The rotation in the cover opening process of the outer cover 2 drives the air pressing mechanism to implement a function of air pressing, and after the air pressing is completed, the delivery mechanism implements a function of powder delivery, to deliver powder such as drug powder to a position of an airflow channel QI of the powder inhalation device 100 (as shown in FIG. 4B), and after the cover opening is performed in place, a function of inhalation trigger is implemented by the trigger mechanism. The powder is exposed in the airflow channel QI, flows to the deagglomeration mechanism through the airflow channel QI, then flows to a position of the suction nozzle 13 after being fully deagglomerated by the deagglomerationmechanism, and is finally inhaled by a user. In the cover closing process of the outer cover 2, the delivery mechanism, the air pressing mechanism, and the trigger mechanism are driven to be reset, and the counting mechanism is driven to implement counting.

[0121] The following describes the functional mechanisms.(1) Air pressing mechanism

[0122] Referring to FIG. 8 to FIG. 24B, FIG. 8 is a schematic structural diagram of an air pressing mechanism of the powder inhalation device provided in FIG. 1, FIG. 9 is a schematic cross-sectional view of the air pressing mechanism provided in FIG. 8, FIG. 10 is a schematic structural diagram of a connecting rod of the air pressing mechanism provided in FIG. 8, FIG. 11A is a schematic structural diagram of a powder container of the air pressing mechanism provided in FIG. 8 from an angle, FIG. 1 IB is a schematic structural diagram of the powder container provided in FIG. 11 A from another angle, FIG. 12 is a schematic cross-sectional view of the powder container provided in FIG. 11 A, FIG. 13 A is a schematic diagram of an assembly structure of a delivery mechanism and a connecting rod of the powder inhalation device provided in FIG. 1 in a state, FIG. 13B is a schematic cross-sectional view of an assembly structure of the delivery mechanism and the connecting rod provided in FIG. 13A, FIG. 14A is a schematic structural diagram of a dose assembly of the delivery mechanism provided in FIG. 13A, FIG. 14B is a schematic cross-sectional view of the dose assembly provided in FIG. 14A, FIG. 15A is a schematic structural diagram of a slider of the dose assembly provided in FIG. 14A from an angle, FIG. 15B is a schematic structural diagram of the slider provided in FIG. 15A from another angle, FIG. 16A is a schematic structural diagram of a dose plate of the dose assembly provided in FIG. 14A from an angle, FIG. 16B is a schematic structural diagram of the dose plate provided in FIG. 16A from another angle, FIG. 17A is a schematic structural diagram of a mounting base of a delivery mechanism of the powder inhalation device provided in FIG. 1 in a state from an angle, FIG. 17B is a schematic structural diagram of the mounting base provided in FIG. 17A from another angle, FIG. 17C is a schematic structural diagram of the mounting base provided in FIG. 17A from still another angle, FIG. 17D is a partially enlarged schematic diagram of the mounting base provided in FIG. 17C, FIG. 17E is a schematic structural diagram of a mounting base of a delivery mechanism of the powder inhalation device provided in FIG. 1 in another state from an angle, FIG. 17F is a partially enlarged schematic diagram of the mounting base provided in FIG. 17E, FIG. 18A is a schematic structural diagram of assembling a delivery mechanism and a connecting rod of thepowder inhalation device provided in FIG. 1 in another state, FIG. 18B is a schematic cross- sectional view of an assembly structure of the delivery mechanism and the connecting rod provided in FIG. 18 A, FIG. 19A is a schematic structural diagram of assembling a delivery mechanism and a connecting rod of the powder inhalation device provided in FIG. 1 in still another state, FIG. 19B is a schematic cross-sectional view of an assembly structure of the delivery mechanism and the connecting rod provided in FIG. 19A, FIG. 20A is a schematic structural diagram of assembling a dose assembly and a connecting rod of the powder inhalation device provided in FIG. 1 in a state, FIG. 20B is a partially enlarged schematic diagram of FIG. 20A, FIG. 21A is a schematic structural diagram of assembling a dose assembly and a connecting rod of the powder inhalation device provided in FIG. 1 in another state, FIG. 21B is a partially enlarged schematic diagram of FIG. 21 A, FIG. 22A is a schematic diagram of an assembly structure of a powder container, a dose protection plate, and a dose assembly of the powder inhalation device provided in FIG. 1 in a state, FIG. 22B is a schematic cross-sectional view of FIG. 22A, FIG. 23 is a schematic cross-sectional view of a powder container, a dose protection plate, and a dose assembly of the powder inhalation device provided in FIG. 1 in still another state, FIG. 24A is a schematic diagram of an assembly structure of a powder container, a dose protection plate, and a dose assembly of the powder inhalation device provided in FIG. 1 in another state, and FIG. 24B is a schematic cross- sectional view of FIG. 24A.

[0123] Referring to FIG. 3, FIG. 6, FIG. 8 to FIG. 12, and FIG. 20A to FIG. 24B, the air pressing mechanism is positioned in the housing 1, and the air pressing mechanism includes a powder container 41, a connecting rod 42, a pressing plate 43, an air capsule 44, and a compression spring 45. The powder container 41 has a storage cavity 411. The storage cavity 411 is configured to store powder. The storage cavity 411 has the top provided with an air pressing port 412 and the bottom provided with a powder exit 413. The air capsule 44 is sleeved on the air pressing port 412 at the top of the storage cavity 411, to implement fixed connection to the powder container 41. The pressing plate 43 is movably sleeved on outer sides of the air capsule 44 and the storage cavity 411, and the compression spring 45 is positioned on a side of the air capsule 44 away from the powder container 41. Specifically, the compression spring 45 is positioned on a side of the pressing plate 43, and one end of the compression spring 45 butts against the pressing plate 43. The connecting rod 42 is movable to and fro between a third position and a fourth position. To facilitate understanding of functions of the air pressing mechanism, the delivery mechanism is briefly described herein. The delivery mechanismincludes a mounting base 51 and a dose assembly 52. The mounting base 51 is positioned on a side of the powder container 41, and the mounting base 51 and the powder container 41 may be assembled and connected in a manner of snap-fit, ultrasonic welding, or gluing.

[0124] The dose assembly 52 is slidably positioned on the mounting base 51. Specifically, the dose assembly 52 includes a slider 521 and a dose plate 522. The slider 521 is slidably positioned on the mounting base 51, and the dose plate 522 is connected to the slider 521 to move synchronously with the slider 521. The dose plate 522 has a measuring cup 523. The dose assembly 52 is movable to and fro between a fifth position and a sixth position. In addition, when the dose assembly 52 is in the fifth position, the measuring cup 523 of the dose plate 522 of the dose assembly 52 is correspondingly located at the bottom of the powder exit 413 of the powder container 41, making it convenient for the air pressing mechanism to squeeze the powder in the storage cavity 411 from the powder exit 413 into the measuring cup 523 of the dose plate 522 of the delivery mechanism during air pressing.

[0125] Specifically, referring to FIG. 6, FIG. 8, and FIG. 9, the connecting rod 42 has one end connected to an end of the pressing plate 43 away from the compression spring 45, and the other end butting against the cam 22 of the outer cover 2. In the cover opening process and the cover closing process of the outer cover 2, the outer cover 2 can move to and fro between the first position and the second position, and the cam 22 of the outer cover 2 rotates to cooperate with the compression spring 45 to drive the connecting rod 42 to move to and fro between the third position and the fourth position. When the outer cover 2 is in the first position, the compression spring 45 is in a compressed state. In the cover opening process of the outer cover 2, that is, during rotation of the outer cover 2 from the first position to the second position, the compression spring 45 continuously extends and drives the pressing plate 43 to move to squeeze the air capsule 44, so that the air capsule 44 is compressed to press air into the storage cavity 411, thereby implementing an air pressing function, and making it convenient to squeeze the powder in the storage cavity 411 from the powder exit 413 into the measuring cup 523 of the dose plate 522 of the delivery mechanism, to facilitate inhalation of the user. In the cover opening process of the outer cover 2, the compression spring 45 provides power for the connecting rod 42 to move from the third position to the fourth position, so that the outer cover 2 can smoothly move from the first position to the second position. In the cover closing process of the outer cover 2, that is, during rotation and resetting of the outer cover 2 from the second position to the first position, the cam 22 rotates to drive the connecting rod 42 to continuouslybutt upward, and then drive the pressing plate 43 to move upward and be reset. Resetting of the pressing plate 43 drives the air capsule 44 to continuously expand. When the outer cover 2 returns to the second position again, that is, after the outer cover 2 is closed in place, the air capsule 44 expands to return to the original state, and the compression spring 45 returns to the initial compressed state again.

[0126] Specifically, as shown in FIG. 8 and FIG. 9, a top wall of the pressing plate 43 is provided with a fixing hole (not marked), and the fixing hole is configured to connect to the top of the air capsule 44. For example, the top of the air capsule 44 may pass through the fixing hole, and the air capsule 44 has one part limited to the outside of the top wall of the pressing plate 43, and the other part limited to a side of the top wall of the pressing plate 43 close to the air pressing port 412, to drive the air capsule 44 to expand or contract through cooperation between expansion or contraction of the compression spring 45 and movement of the pressing plate 43. By driving the air capsule 44 to expand or contract through the pressing plate 43, the air pressing efficiency of the air capsule 44 can be improved, thereby avoiding a problem that the air capsule 44 cannot be reset and consequently the air capsule 44 abnormally operates. The air capsule 44 may be made of silicone or a PVC material. The air capsule 44 is of a bellows structure with a small upper end and a large lower end. In the entire air pressing process, a compression stroke of the air capsule 44 is in a range of 3 mm to 10 mm. The air capsule 44 is positioned, and the air capsule 44 can pump air into the storage cavity 411 under the action of the pressing plate 43, to avoid a problem that small-particle powder in the storage cavity 411, such as powder with a particle diameter ranging from 50 pm to 500 pm, cannot be smoothly discharged under only the action of gravity due to Van Der Waals force, adhesion force, or the like between the powder particles and fill the measuring cup 523, and overcome a tailing effect at the end of powder filling, thereby ensuring that the powder is smoothly discharged with a consistent dose each time, and improving consistency and precision of an administration dose.

[0127] Specifically, as shown in FIG. 8, FIG. 9, and FIG. 11A to FIG. 12, during powder filling, when the dose assembly 52 is in the fifth position, the measuring cup 523 is located below the powder exit 413 of the storage cavity 411 in a vertical direction. When the air capsule 44 is compressed, the airflows to the storage cavity 411 to urge the powder to fill the measuring cup 523. The powder in the storage cavity 411 flows to the measuring cup 523 mainly in dependence on its own gravity, and the air pressing of the air capsule 44 plays only a certain auxiliary role in the powder filling.

[0128] Specifically, as shown in FIG. 8, FIG. 9, and FIG. 11 A to FIG. 12, a side wall of the storage cavity 411 of the powder container 41 is provided with a pressure relief hole 414. The air capsule 44 is sleeved on the air pressing port 412 and covers the pressure relief hole 414. One end of the pressure relief hole 414 communicates with a space between the air capsule 44 and the storage cavity 411. The dose assembly 52 of the delivery mechanism is movable to and fro between the fifth position and the sixth position. Specifically, when the dose assembly 52 is in the fifth position, the dose assembly 52 blocks an end of the pressure relief hole 414 away from the air capsule 44, so that the pressure relief hole 414 does not communicate with the outside.

[0129] During the air pressing stroke of the air capsule 44, that is, before the dose assembly 52 moves to the sixth position, when the air capsule 44 is compressed, the airflow flows into the storage cavity 411, so that the powder in the storage cavity 411 is loosened and discharged to fill the measuring cup 523, to complete the powder filling. In this process, the airflow generated by compressing the air capsule 44 cannot flow through the pressure relief hole 414 to be discharged from the inside of the powder container 41.

[0130] After the air pressing stroke ends, that is, after the powder filling is completed, in a delivery stroke, during movement of the dose assembly 52 of the delivery mechanism from the fifth position to the sixth position, the measuring cup 523 of the dose assembly 52 moves away from the bottom of the powder exit 413, and the movement of the dose assembly 52 causes an end of the pressure relief hole 414 away from the air capsule 44 to be exposed, and then causes the space between the air capsule 44 and the storage cavity 411 to communicate with the outside through the pressure relief hole 414. The connecting rod 42 continues to move to the fourth position, to drive the air capsule 44 to continue to be compressed. In this process, the airflow generated by compressing the air capsule 44 is discharged from the inside of the powder container 41 through the pressure relief hole 414, so that the pressure is relieved from the inside of the storage cavity 411 of the powder container 41. That is to say, a pressure relief process of the storage cavity 411 of the powder container 41 occurs in the delivery stroke of the delivery mechanism, that is, occurs during the movement of the dose assembly 52 from the fifth position to the sixth position.

[0131] In some implementations, a hole diameter of the pressure relief hole 414 is greater than or equal to 1.0 mm and less than or equal to 2.0 mm. For example, the hole diameter of the pressure relief hole 414 is any size in the foregoing range, such as 1.0 mm, 1.3 mm, 1.5mm, 1.7 mm, 1.8 mm, or 2.0 mm. It may be understood that the hole diameter of the pressure relief hole 414 should not be excessively large or excessively small, and by setting the hole diameter of the pressure relief hole 414 within the foregoing range, a pressure relief effect can be ensured.

[0132] In some implementations, in the entire air pressing process of the air capsule 44, the airflow flowing through the storage cavity 411 is less than the airflow flowing through the pressure relief hole 414. Specifically, a ratio of the amount of the airflow flowing through the pressure relief hole 414 to the amount of the airflow flowing through the storage cavity 411 approximately ranges from 2: 1 to 5 : 1. Preferably, the ratio of the amount of the airflow flowing through the pressure relief hole 414 to the amount of the airflow flowing through the storage cavity 411 is approximately 4: 1. In a specific implementation, an initial height of the air capsule 44 is 11.8 mm, which is equivalent to a volume of about 2194 mm3. In an air pressing stroke, that is, during powder filling, a compression stroke of the air capsule 44 is 2 mm, which is equivalent to a compression volume of about 371.9 mm3. In a delivery stroke, that is, during compression of the air capsule 44 and pressure relief of the storage cavity 411, a compression stroke of the air capsule 44 is 6 mm, which is equivalent to a compression volume of about 1115.6 mm3.

[0133] As shown in FIG. 3 and FIG. 9, in some implementations, the air pressing mechanism further includes a waterproof breathable film 46. The waterproof breathable film 46 covers the air pressing port 412 to isolate a space between the air capsule 44 and the air pressing port 412 from an internal space of the storage cavity 411. Specifically, the waterproof breathable film 46 may be made by using a PE sintering process, and is provided with a plurality of micropores with a pore size ranging from 5 pm to 100 pm thereon. The waterproof breathable film 46 may be configured to prevent moisture in the air from entering the storage cavity 411, to avoid such a case that the powder in the storage cavity 411 is dampened and has no effect, and the plurality of structurally micropores thereof may allow the air to pass through, so that the air generated after the air capsule 44 is compressed may pass through the waterproof breathable film 46 and enter the storage cavity 411 to make it convenient to loosen the powder. In addition, the waterproof breathable film 46 can also avoid a problem that the drug powder enters the air capsule 44 from the inside of the storage cavity 411 to waste the powder. The waterproof breathable film 46 may be assembled and connected through interference fit with a side surface of the air pressing port 412 at the top of the storage cavity 411. The arrangement of thewaterproof breathable film 46 can filter impurities, moisture, and the like in the powder, to prevent the powder in the storage cavity 411 from being dampened, and can also avoid a problem that the powder in the storage cavity 411 is raised and consequently is leaked through the pressure relief hole 414 to waste the powder.

[0134] Specifically, the pressure relief hole 414 is provided on a side wall of the storage cavity 411. As shown in FIG. 9 and FIG. 11A to FIG. 12, in an implementation, the pressure relief hole 414 is a through hole provided on the side wall of the storage cavity 411. Preferably, the pressure relief hole 414 is a straight-through hole extending from the top of the side wall of the storage cavity 411 to the bottom of the side wall of the storage cavity 411, and the pressure relief hole 414 and the inside of the storage cavity 411 are spaced apart from each other. The pressure relief hole 414 has one end communicating with a space between the waterproof breathable film 46 and the air capsule 44, and the other end extending to a bottom surface of the powder container 41. The pressure relief hole 414 does not directly communicate with the internal space of the storage cavity 411, and is independent of the inside of the storage cavity 411.

[0135] During movement of the dose assembly 52 from the fifth position to the sixth position, that is, in the delivery stroke, during compression of the air capsule 44, air directly enters the pressure relief hole 414 from the space between the waterproof breathable film 46 and the air capsule 44, and is discharged from the powder container 41 through the pressure relief hole 414, to relieve the pressure of the space between the air capsule 44 and the waterproof breathable film 46. It may be understood that, one end of the pressure relief hole 414 directly communicates with the space between the waterproof breathable film 46 and the air capsule 44, which can avoid a case that the pressure relief hole 414 directly communicates with the inside of the storage cavity 411 and the air in the storage cavity 411 is directly leaked from the pressure relief hole 414 during the pressure relief, to raise or leak the drug powder in the storage cavity 411. In addition, during expansion of the air capsule 44, that is, during inhalation of the air capsule 44, external air enters the space between the waterproof breathable film 46 and the air capsule 44 from the pressure relief hole 414, and then enters the storage cavity 411 through the waterproof breathable film 46, to avoid a case that the pressure relief hole 414 directly communicates with the inside of the storage cavity 411, and the external air directly enters the storage cavity 411 from the pressure relief hole 414 during inhalation of the air capsule 44, tobring external water molecules into the storage cavity 411, and consequently raise or dampen the drug powder in the storage cavity 411 to cause waste.

[0136] In some implementations, a pressure of the compression spring 45 is greater than or equal to 1 N and less than or equal to 30 N, and a speed at which the air capsule 44 is compressed is greater than or equal to 0.1 mm / s and less than or equal to 10 mm / s.

[0137] It may be understood that the pressure of the compression spring 45 at the top of the air capsule 44 and the speed at which the air capsule 44 is compressed are controlled within the foregoing ranges, which can avoid a problem that the air capsule 44 is compressed too fast to compact the drug powder, and avoid a problem that the air capsule 44 is compressed too slowly to make it inconvenient for the air to pass through the waterproof breathable film 46 and enter the storage cavity 411, and therefore the powder is not loosened and the effect of discharging the powder such as the drug powder into the measuring cup 523 from the storage cavity 411 of the powder container 41 is not improved. In addition, the pressure of the compression spring 45 is small. In the cover closing process, during resetting of the air pressing mechanism, a smaller force is required for resetting the compression spring 45, the compression spring 45 is pushed more easily, and structural members such as the compression spring 45 and the air capsule 44 may be reset more easily.

[0138] As shown in FIG. 9 and FIG. 12, a size of the air pressing port 412 at the top of the storage cavity 411 is greater than a size of the powder exit 413 at the bottom of the storage cavity 411, and the powder exit 413 of the powder container 41 is positioned eccentrically relative to the air pressing port 412. Specifically, the inside of the storage cavity 411 is in a state of being linearly tapered. In a vertical direction, the powder exit 413 and the air pressing port 412 are not located on a same axis, so that the powder in the storage cavity 411 can flow to the position of the powder exit 413 more smoothly.

[0139] In an implementation, the shape of the powder exit 413 is a circle, and a diameter of the circle is greater than or equal to 0.5 mm and less than or equal to 5 mm. For example, the diameter of the powder exit 413 is any value such as 0.5 mm, 0.8 mm, 1 mm, 1.3 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.6 mm, 4 mm, 4.5 mm, 4.8 mm, or 5 mm. In another implementation, the shape of the powder exit 413 may alternatively be set to an elliptical racetrack shape (as shown in FIG. 1 IB). The powder exit 413 has the length greater than or equal to 3 mm and less than or equal to 10 mm and the width greater than or equal to 2 mm and less than or equal to 5mm. For example, the length of the powder exit 413 is any value such as 3 mm, 3.5 mm, 3.8 mm, 4 mm, 4.5 mm, 4.7 mm, 5 mm, 5.3 mm, 5.5 mm, 5.8 mm, 6 mm, 6.5 mm, 6.7 mm, 7 mm, 7.5 mm, 7.6 mm, 8 mm, 8.3 mm, 8.5 mm, 9 mm, 9.5 mm, or 10 mm, and the width of the powder exit 413 is any value such as 2 mm, 2.3 mm, 2.5 mm, 2.8 mm, 3 mm, 3.2 mm, 3.5 mm, 3.8 mm, 4 mm, 4.1 mm, 4.5 mm, 4.7 mm, or 5 mm, as long as the length of the powder exit 413 is greater than the width of the powder exit 413. The size of the powder exit 413 should not be excessively small, to avoid a problem that the powder does not fill the measuring cup 523. It may be understood that the particle size of the powder stored in the storage cavity 411 of the powder container 41 is greater than or equal to 50 pm and less than or equal to 500 pm. For example, the particle size of the powder is any value such as 50 pm, 60 pm, 70 pm, 80 pm, 100 pm, 120 pm, 150 pm, 170 pm, 200 pm, 230 pm, 250 pm, 280 pm, 300 pm, 350 pm, 370 pm, 400 pm, 450 pm, or 500 pm. The size of the powder exit 413 is set within the foregoing range. The size of the powder exit 413 is large, and the particle size of the powder stored in the storage cavity 411 is small, which can ensure that the drug powder particles in the storage cavity 411 are smoothly discharged from the powder exit 413, thereby avoiding the problem of unsmooth powder discharge. In another implementation, the powder exit 413 may alternatively be set in any other shape or size, as long as the powder in the storage cavity 411 can be smoothly discharged.

[0140] In this implementation, the size of the powder exit 413 is set within the foregoing range. The particle size of the powder stored in the storage cavity 411 is greater than or equal to 50 pm and less than or equal to 500 pm. The powder in the storage cavity 411 is smallparticle powder. The size of the powder exit 413 is large, and the powder in the storage cavity 411 may also flow to the measuring cup 523 through the powder exit 413 in dependence on its own gravity. By setting the pressure of the compression spring 45 within the range greater than or equal to 1 N and less than or equal to 30 N, the speed at which the air capsule 44 is compressed is greater than or equal to 0.1 mm / s and less than or equal to 10 mm / s. The pressure of the compression spring 45 is small, and the speed at which the air capsule 44 is compressed is low. In the air pressing stroke, the airflow flowing into the storage cavity 411 has a small amount and a low flow rate, and disturbs only the small-particle powder in the storage cavity 411 to some extent, the powder is dispersed, and the powder is loosened, so that the powder flows into the measuring cup 523 more smoothly to complete the powder filling, to avoid the problem that the powder in the storage cavity 411 is compacted due to an excessively high pressure of the compression spring 45 and an excessively high speed at which the air capsule44 is compressed. That is, in this implementation, the setting the foregoing parameters within the foregoing specific ranges resolves the problem that small-particle powder cannot be smoothly discharged from the storage cavity 411 under only the action of gravity due to Van Der Waals force, adhesion force, or the like between the powder and fills the measuring cup 523, and can effectively prevent the powder in the storage cavity 411 from being compacted, and facilitate resetting of the air pressing mechanism, making resetting of the air pressing mechanism easier.

[0141] Specifically, in this implementation, the small-particle powder in the storage cavity 411 fills the measuring cup 523 mainly in dependence on its own gravity, and the air pressing of the air capsule 44 plays only a certain auxiliary role. The pressure of the compression spring45 is set within the range greater than or equal to 1 N and less than or equal to 30 N, and the pressure is small. During movement of the dose assembly 52 from the fifth position to the sixth position, before the measuring cup 523 leaves from the position corresponding to the powder exit 413, the air capsule 44 still presses air into the storage cavity 411. In this case, the pressure has not started to be relieved. Because a pressure of the compression spring 45 is small, even if the compression spring 45 drives the air capsule 44 to be compressed, a compression stroke of the air capsule 44 is still small, and the powder is not easily squeezed to a space between the dose assembly 52 and the bottom surface of the powder container 41, thereby reducing a risk of powder jamming between the dose assembly 52 and the powder container 41 and a risk of powder waste.

[0142] Referring to FIG. 11 A to FIG. 12, the side wall of the storage cavity 411 of the powder container 41 is further provided with an receiving cavity 415. The receiving cavity 415 is configured to store a desiccant. The storage cavity 411 and the receiving cavity 415 have a common side wall. The common side wall may be made of a water-permeable material. The desiccant is sealed in the receiving cavity 415 by using an aluminum foil. In addition, the desiccant is in contact with the common side wall, and can dry the powder in the storage cavity 411, so that the desiccant in the receiving cavity 415 can absorb moisture in the storage cavity 411, to prevent the powder in the storage cavity 411 from being dampened.

[0143] The connecting rod 42 is movable to and fro between the third position and the fourth position. Specifically, as shown in FIG. 6, FIG. 7A, and FIG. 7B, an end of the connecting rod 42 away from the pressing plate 43 is a butting end 421, and the butting end 421 butts against the cam 22 of the outer cover 2. When the outer cover 2 is in the first position, that is, whenthe outer cover 2 is in the cover closed state, the cam 22 of the outer cover 2 limits the connecting rod 42 to the third position. During rotation of the outer cover 2 from the first position to the second position, that is, in the cover opening process of the outer cover 2, the cam 22 of the outer cover 2 gradually moves aside, so that the compression spring 45 drives the connecting rod 42 to move from the third position to the fourth position. Specifically, in the cover opening process of the outer cover 2, the compression spring 45 drives the connecting rod 42 to move downward in the vertical direction.

[0144] A stroke by which the outer cover 2 rotates from the first position to the second position is defined as a cover opening stroke, and the cover opening stroke includes an air pressing stroke and a delivery stroke that are sequentially positioned, and an unlocking stroke that is performed synchronously with the air pressing stroke and the delivery stroke. In the air pressing stroke, the connecting rod 42 starts to move from the third position to the fourth position, and the compression spring 45 compresses the air capsule 44 to press air into the powder container 41, to fill the measuring cup 523 of the dose assembly 52 with the powder in the powder container 41. An angle of the outer cover 2 in the first position is defined as 0 degrees, and an angle of the outer cover 2 in the second position is in a range of 120 degrees to 180 degrees. In a specific implementation, an angle of the outer cover 2 in the second position is 135 degrees.

[0145] In an implementation, as shown in FIG. 7A and FIG. 7B, the side surface of the cam 22 of the outer cover 2 includes a plane segment 221, a first circular arc surface segment 222, and a second circular arc surface segment 224 that are sequentially connected, and an end of the plane segment 221 away from the first circular arc surface segment 222 is provided with a limiting bump 223. When the outer cover 2 is in the first position, that is, when the outer cover 2 is in the closed state, the butting end 421 of the connecting rod 42 butts against a side of the limiting bump 223 of the cam 22 away from the plane segment 221. The limiting bump 223 may initially position and preliminarily limit the connecting rod 42. At the start of cover opening, the butting end 421 of the connecting rod 42 needs to cross the limiting bump 223, and movement of the air pressing mechanism needs to overcome resistance to the butting end 421 of the connecting rod 42 crossing the limiting bump 223. By arranging the limiting bump 223, accidental cover opening and accidental trigger of the air pressing mechanism can be effectively prevented.

[0146] In the air pressing stroke, the delivery stroke, and the unlocking stroke, the rotation of the outer cover 2 causes the compression spring 45 to drive the connecting rod 42 to continuously move from the third position to the fourth position in the vertical direction. In the air pressing stroke and the delivery stroke, the butting end 421 of the connecting rod 42 butts against different segments of the side surface of the cam 22 of the outer cover 2.

[0147] Specifically, during rotation of the outer cover 2 from the first position to the second position, the air pressing stroke is first performed. In the air pressing stroke, the butting end 421 of the connecting rod 42 first needs to cross the limiting bump 223. In a specific implementation, during movement of the butting end 421 of the connecting rod 42 from an end of the limiting bump 223 away from the plane segment 221 to an end of the limiting bump 223 close to the plane segment 221, the limiting bump 223 butts the connecting rod 42 upward, an upward movement stroke of the connecting rod 42 is about 0.6 mm, and the upward movement of the connecting rod 42 causes the compression spring 45 to be compressed and the air capsule 44 to expand.

[0148] After crossing the limiting bump 223, the butting end 421 of the connecting rod 42 slidably butts against the plane segment 221 of the cam 22, and then the butting end 421 of the connecting rod 42 slides along the plane segment 221 and the first circular arc surface segment 222 sequentially to a connection position between the first circular arc surface segment 222 and the second circular arc surface segment 224. In this process, the compression spring 45 is extended, the connecting rod 42 moves downward under the action of the compression spring 45, and the outer cover 2 is instantaneously opened. The pressing plate 43 of the air pressing mechanism moves downward synchronously under the driving action of the compression spring 45, to squeeze the air capsule 44, so that the air capsule 44 is compressed and pumps air into the storage cavity 411, thereby implementing an air pressing mechanism function. In a specific implementation, during sliding of the butting end 421 of the connecting rod 42 from an end of the plane segment 221 away from the second circular arc surface segment 224 to a joint between the first circular arc surface segment 222 and the second circular arc surface segment 224, a downward movement stroke of the connecting rod 42 is about 2 mm.

[0149] In the air pressing stroke, the butting end 421 of the connecting rod 42 first needs to cross the limiting bump 223 and then slide along the plane segment 221 and the first circular arc surface segment 222. A large force is required for the connecting rod 42 to cross the limiting bump 223. Therefore, in the air pressing stroke in the cover opening of the outer cover 2, thetorque tends to increase first and then decrease, which can effectively prevent accidental cover opening and accidental trigger of the air pressing mechanism.

[0150] In a specific implementation, the outer cover 2 rotates from 0 degrees to 50 degrees in the air pressing stroke. At the end of the air pressing stroke, the delivery mechanism has not moved, and the measuring cup 523 is still located below the powder exit 413. In this case, the angle of the outer cover 2 causes the suction nozzle 13 of the powder inhalation device 100 to be not completely exposed, that is, the outer cover 2 still blocks part of the suction nozzle 13. In this case, the lips of the user are disturbed by the outer cover 2 and cannot suck the suction nozzle 13, which can avoid a problem that the suction nozzle 13 is fully exposed before the delivery mechanism moves, that is, before the powder in the measuring cup 523 is delivered to a powder inhalation position, and consequently the user inhales from the suction nozzle 13 to affect the user experience.

[0151] It may be understood that, in this disclosure, the powder in the storage cavity 411 has a small particle size, and fills the measuring cup 523 mainly in dependence on its own gravity. The pressure of the compression spring 45 is small, and the speed at which the air capsule 44 is compressed is low. The compression of the air capsule 44 in the air pressing stroke plays only an auxiliary role in filling the measuring cup 523 with the powder. Therefore, before the delivery mechanism is triggered, that is, before the delivery stroke starts (the dose assembly 52 of the delivery mechanism still has not left from the fifth position, and the measuring cup 523 is still located below the powder exit 413), even if the outer cover 2 is repeatedly opened or closed within the foregoing angle range, that is, the air pressing stroke is repeatedly performed, the powder in the measuring cup 523 is not likely to be compacted or the powder dose in the measuring cup 523 is uneven or inconsistent because the air capsule 44 is repeatedly compressed, and the consistency of the administration dose is not affected.

[0152] In another implementation, the side surface of the cam 22 of the outer cover 2 may not include the plane segment 221, that is, the side surface of the cam 22 includes only the first circular arc surface segment 222 and the second circular arc surface segment 224 connected to each other, and a limiting bump 223 is positioned at an end of the first circular arc surface segment 222 away from the second circular arc surface segment 224. In the air pressing stroke, the butting end of the connecting rod 42 may also move from an end of the limiting bump 223 away from the first circular arc surface segment 222 to a joint between the first circular arcsurface segment 222 and the second circular arc surface segment 224. A specific shape of the side surface of the cam 22 may be designed as required, which is not limited in this disclosure.

[0153] After the air pressing stroke ends, the connecting rod 42 continues to move downward in the vertical direction to perform the delivery stroke. In the delivery stroke, the connecting rod 42 continues to move to the fourth position and remove the limitation on the dose assembly 52 from the mounting base 51, so that the delivery mechanism is triggered. Specifically, in the delivery stroke, the butting end 421 of the connecting rod 42 slides from the joint between the first circular arc surface segment 222 and the second circular arc surface segment 224 to an end of the second circular arc surface segment 224 away from the first circular arc surface segment 222 along the second circular arc surface segment 224 of the side surface of the cam 22. That is, at the end of the delivery stroke, the butting end 421 of the connecting rod 42 butts against the end of the second circular arc surface segment 224 away from the first circular arc surface segment 222. In this case, the connecting rod 42 is in the fourth position. Specifically, after crossing the connection position between the first circular arc surface segment 222 and the second circular arc surface segment 224, the butting end 421 of the connecting rod 42 instantaneously slides on the second circular arc surface segment 224, and the connecting rod 42 instantaneously moves downward to instantaneously remove the limitation on the delivery mechanism and quickly trigger the delivery mechanism to move toward the sixth position. In a specific implementation, in the delivery stroke, a downward movement stroke of the connecting rod 42 is about 6 mm.

[0154] After the air pressing stroke ends, in the delivery stroke, the butting end 421 of the connecting rod 42 first needs to cross the joint between the first circular arc surface segment 222 and the second circular arc surface segment 224 to trigger the dose assembly 52 of the delivery mechanism to move toward the sixth position. In this case, a large force is required. Therefore, in the delivery stroke in the cover opening process of the outer cover 2, the torque tends to increase first and then decrease, which can effectively prevent accidental trigger of the delivery mechanism.

[0155] In the delivery stroke, the connecting rod 42 moves downward, the compression spring 45 continues to be extended, and the pressing plate 43 of the air pressing mechanism synchronously moves downward under the driving action of the compression spring 45, to squeeze the air capsule 44, so that the air capsule 44 continues to be compressed. In this process, the dose assembly 52 of the delivery mechanism moves from the fifth position to the sixthposition, a port of the pressure relief hole 414 is exposed, the pressure relief hole 414 communicates with the outside, and the air capsule 44 is compressed to perform a pressure relief process, that is, perform the pressure relief process simultaneously in the delivery stroke.

[0156] As shown in FIG. 22A to FIG. 24B, the dose assembly 52 of the delivery mechanism can be driven by the first elastic member 536 of the powder inhalation device 100 to move from the fifth position to the sixth position. The fifth position is a powder filling position, and the sixth position is a powder inhalation position. As shown in FIG. 3, and FIG. 22A to FIG. 22B, when the dose assembly 52 is in the fifth position, the powder exit 413 of the powder container 41 is aligned with the measuring cup 523 of the dose plate 522. When the dose assembly 52 is in the sixth position, as shown in FIG. 4A, FIG. 4B, and FIG. 23 to FIG. 24B, the measuring cup 523 of the dose plate 522 is unaligned with the powder exit 413 of the powder container 41, is located on the airflow channel QI, and is positioned corresponding to a port of a powder inlet 518 of the deagglomeration mechanism of the powder inhalation device 100. In a specific implementation, in the delivery stroke, the outer cover 2 rotates from 50 degrees to 135 degrees, and the measuring cup 523 of the delivery mechanism moves from the powder filling position to the powder inhalation position, to complete the powder delivery process. At the end of the delivery stroke, the connecting rod 42 moves to the fourth position, and the dose assembly 52 of the delivery mechanism moves to the sixth position.

[0157] At the end of the delivery stroke, the suction nozzle 13 of the powder inhalation device 100 is exposed, making it convenient for the user to inhale from the position of the suction nozzle 13 to perform an inhalation trigger process, so that the trigger mechanism is triggered, thereby making it convenient for the powder to enter the deagglomeration mechanism.

[0158] In the cover opening stroke of the outer cover 2, the unlocking stroke is synchronously performed with the air pressing stroke and the delivery stroke. That is, at the start of the air pressing stroke, the unlocking stroke is started when the connecting rod 42 starts to move from the third position to the fourth position, until the delivery stroke ends. When the connecting rod 42 moves to the fourth position, the unlocking stroke ends. Before the unlocking stroke starts, that is, when the connecting rod 42 is in the third position, the connecting rod 42 limits the pawl 62 of the trigger mechanism. In the unlocking stroke, the connecting rod 42 moves downward to remove the limitation on the pawl 62 of the trigger mechanism. The pawl 62 butts against the air inlet baffle 63 of the trigger mechanism and is limited to the ninth position by the air inlet baffle 63. A positional relationship among the connecting rod 42, the pawl 62, andthe air inlet baffle 63 of the trigger mechanism in the unlocking stroke is described in detail in a subsequent part, and is not described in detail herein.

[0159] Specifically, as shown in FIG. 10, the connecting rod 42 of the air pressing mechanism includes a protruding structure 422. The protruding structure 422 is positioned on a side wall of the connecting rod 42. The protruding structure 422 may be fixedly connected to the connecting rod 42 by gluing, snap connection, or the like, or may be integrally formed with the connecting rod 42. When the outer cover 2 is in the first position, that is, when the powder inhalation device 100 is in the cover closed state, and the connecting rod 42 is in the third position, the protruding structure 422 of the connecting rod 42 butts against the dose assembly 52 of the delivery mechanism (as shown in FIG. 20A and FIG. 20B), the mounting base 51 limits the dose assembly 52, and the protruding structure 422 limits the dose assembly 52 to the fifth position. In the cover opening process of the outer cover 2, as shown in FIG. 21 A and FIG. 2 IB, in a process in which the connecting rod 42 moves from the third position to the fourth position, the protruding structure 422 of the connecting rod 42 gradually removes the limitation on the dose assembly 52 and triggers removal of the limitation between the dose assembly 52 and the mounting base 51.

[0160] Further, as shown in FIG. 10, a guide rib 423 is further positioned on the protruding structure 422 of the connecting rod 42. The guide rib 423 is positioned on a side surface of the protruding structure 422. The guide rib 423 may be fixedly connected to the protruding structure 422 by gluing, snap connection, or the like, or may be integrally formed with the protruding structure 422. A guide groove 512 is provided on the mounting base 51 of the delivery mechanism, and the guide rib 423 is slidably positioned in the guide groove 512 of the mounting base 51 (referring to FIG. 17 A). During the to-and-fro movement of the connecting rod 42 between the third position and the fourth position, the guide rib 423 slides in the guide groove 512, which can ensure that the connecting rod 42 stably moves up and down in the vertical direction, to avoid a case that the connecting rod 42 deviates left or right during movement and consequently the dose slider 521 of the delivery mechanism does not move in place. The connecting rod 42 is limited in a moving direction of the slider 521 by using the guide groove 512, to avoid problems of assembly inconvenience and inaccurate positioning caused by limiting the connecting rod 42 by using the housing 1.

[0161] Referring to FIG. 1 IB, an airway groove 416 is further provided at the bottom of the powder container 41. The airway groove 416 and the powder exit 413 are spaced apart in thefirst direction Al. The airway groove 416 extends in a second direction A2. The first direction Al and the second direction A2 are perpendicular to each other and are both perpendicular to the vertical direction. An air inlet port 417 is provided at an end of the airway groove 416. The air inlet port 417 communicates with external atmosphere. The external atmosphere enters the airway groove 416 through the air inlet port 417. Further, a bottom wall of the airway groove 416 has a protruding portion 418. The protruding portion 418 protrudes from a bottom surface of the airway groove 416. Preferably, a shape of the protruding portion 418 matches a shape of the measuring cup 523 on the dose plate 522. As shown in FIG. 4B, when the dose assembly 52 of the delivery mechanism is in the sixth position, that is, the powder inhalation position, the protruding portion 418 is positioned corresponding to the measuring cup 523 of the dose plate 522 of the dose assembly 52, and the measuring cup 523 of the dose plate 522 directly faces the position of the protruding portion 418 on the bottom wall of the airway groove 416, and can conveniently guide the air entering the airway groove 416 from the air inlet port 417 when flowing through the airway groove 416 during inhalation of the user, so that the airflow can flow through the surface of the protruding portion 418. The airflow flowing through the surface of the protruding portion 418 can be guided to pass through the inside of the measuring cup 523, so that the airflow completely flows through the entire measuring cup 523, thereby more smoothly bringing the powder in the measuring cup 523 out, ensuring smooth emptying of the powder, and improving the emptying rate and the utilization rate of the powder, to further ensure consistency and precision of the administration, improve the administration precision, and avoid waste.

[0162] Preferably, as shown in FIG. 4C, an angle a formed between a connecting line between the lowest point and the highest point of the protruding portion 418 on the bottom wall of the airway groove 416 and a horizontal plane is not less than 20°, that is, an angle a between a connecting line between a vertex of the protruding portion 418 and the bottom surface of the airway groove 416 and the horizontal plane is greater than or equal to 20°. The foregoing arrangement may be more conducive to the emptying of the powder in the measuring cup 523, thereby improving the powder utilization rate.

[0163] In an implementation, referring to FIG. 4A, FIG. 4B, and FIG. 1 IB, a corner between the bottom wall and the side wall of the airway groove 416 smoothly transitions through an arc surface, that is, a chamfer is provided at an end of the airway groove 416 away from the air inlet port 417. The chamfer may be a round. Alternatively, in another implementation, thechamfer may be a bevel. It may be understood that, after flowing through the airway groove 416 and bringing out the powder in the measuring cup 523, the airflow enters the mounting base 51 of the delivery mechanism at the bottom of the powder container 41 and flows to the deagglomeration mechanism, to deliver the powder in the measuring cup 523 into the deagglomeration mechanism. When the airflow enters the mounting base 51 through an end of the airway groove 416 away from the air inlet port 417, a direction of the airflow changes abruptly. A chamfer is provided at the end of the airway groove 416 away from the air inlet port 417, so that a comer between the bottom wall and the side wall of the airway groove 416 smoothly transitions through an arc surface, and the airflow can be buffered and generation of an eddy can be reduced, thereby effectively avoiding the problem that the powder is wasted because the powder jams and remains in the position of the comer between the bottom wall and the side wall of the airway groove 416 when the corner between the bottom wall and the side wall of the airway groove 416 is a right angle.

[0164] Further, as shown in FIG. 1 IB, a third receiving groove 419 is further provided at the bottom of the powder container 41, and the third receiving groove 419 is spaced apart from the powder exit 413 of the powder container 41. As shown in FIG. 22 A to FIG. 24B, the third receiving groove 419 is configured to accommodate the dose protection plate 61 of the trigger mechanism, so that the dose protection plate 61 can move to and fro in the third receiving groove 419 between the seventh position and the eighth position. Preferably, the airway groove 416 is positioned on a bottom wall of the third receiving groove 419.

[0165] The delivery mechanism is described below in detail.(2) Delivery mechanism

[0166] Referring to FIG. 13 A to FIG. 24B, the powder inhalation device 100 includes a delivery mechanism. The delivery mechanism is positioned at the bottom of the powder container 41 of the air pressing mechanism, and an airflow channel QI is formed between the delivery mechanism and the powder container 41 of the air pressing mechanism. Specifically, the delivery mechanism includes a dose assembly 52 and a mounting base 51. The dose assembly 52 is slidably positioned between the mounting base 51 and the powder container 41, and the dose assembly 52 is movable to and fro between a fifth position and a sixth position, to deliver the powder in the powder container 41 onto the airflow channel QI.

[0167] The mounting base 51 is configured to limit the dose assembly 52 to the fifth position. Specifically, one of the mounting base 51 and the dose assembly 52 of the delivery mechanism includes a first elastic arm snap 524, and the other includes a snap-fit portion 513 that fits the first elastic arm snap 524. As shown in FIG. 13B, FIG. 13C, FIG. 15A, FIG. 15B, and FIG. 17A to FIG. 24B, in an implementation, the mounting base 51 has a snap-fit portion 513, and the dose assembly 52 has a first elastic arm snap 524. In another implementation, alternatively, a first elastic arm snap 524 may be positioned on the mounting base 51, and a snap-fit portion 513 is positioned in the dose assembly 52, to limit the dose assembly 52 through cooperation between the first elastic arm snap 524 and the snap-fit portion 513, to limit the dose assembly 52 to the fifth position before the delivery mechanism is triggered.

[0168] Referring to FIG. 15 A, FIG. 15B, and FIG. 17A to FIG. 24B, a surface of the mounting base 51 has a sliding groove 514. Specifically, the sliding groove 514 is positioned on a surface of the mounting base 51 close to the powder container 41. The sliding groove 514 has a first side surface 515 and a second side surface 516 that are positioned opposite to each other. The first side surface 515 and the second side surface 516 are positioned opposite to each other in the second direction A2. The snap-fit portion 513 is positioned on the first side surface 515 of the sliding groove 514. Specifically, the snap-fit portion 513 is a protrusion positioned on the first side surface 515 of the sliding groove 514. The dose assembly 52 is slidably positioned in the sliding groove 514 of the mounting base 51. A first elastic arm snap 524 is positioned on a side of the dose assembly 52, and an end of the first elastic arm snap 524 butts against the first side surface 515 of the sliding groove 514 (as shown in FIG. 13B). It may be understood that the arranging an end of the first elastic arm snap 524 to butt against the first side surface 515 of the sliding groove 514 can reduce friction between the dose assembly 52 and the mounting base 51, to maintain stable movement of the dose assembly 52 between the fifth position and the sixth position.

[0169] Specifically, referring to FIG. 14A to FIG. 19B, the dose assembly 52 includes a slider 521, a dose plate 522, and a fifth elastic member 525. The slider 521 has a first surface 526 and a second surface 527 opposite to each other. The first surface 526 and the second surface 527 are positioned opposite to each other in a vertical direction. The dose plate 522 is positioned on the first surface 526 of the slider 521. Specifically, the first surface 526 of the slider 521 has a first limiting wall 528 and a second limiting wall 529 that are spaced apart in a sliding direction of the slider 521, and the dose plate 522 is snapped between the first limiting wall528 and the second limiting wall 529. The fifth elastic member 525 is positioned between the slider 521 and the dose plate 522. The first elastic arm snap 524 is positioned on a side surface of the slider 521. The fifth elastic member 525 may be a structural member such as a spring or an elastic piece. By arranging the fifth elastic member 525 between the slider 521 and the dose plate 522, the dose plate 522 can tightly press against the bottom surface of the powder container 41. By arranging the fifth elastic member 525, effective elastic sealing can be formed between the dose plate 522 and the powder container 41, to prevent powder such as drug powder from leaking from a gap between the dose plate 522 and the powder container 41, which is beneficial to improving precision and consistency of an administration dose. The fifth elastic member 525 can automatically and effectively adjust a pressure between the dose plate 522 and a bottom of the powder container 41 in real time, to avoid a problem that the dose plate 522 has excessively large friction with the bottom of the powder container 41 and is stuck and cannot move due to problems such as an assembly gap or powder jamming.

[0170] Specifically, as shown in FIG. 14B, in an implementation, the fifth elastic member 525 includes two springs, and the two springs are spaced apart in the sliding direction of the slider 521. Specifically, the slider 521 slides in the first direction Al, and the two springs are spaced apart between the dose plate 522 and the slider 521 in the first direction Al.

[0171] Further, a first receiving groove 530 is provided in a position on the first surface 526 of the slider 521 corresponding to a spring, and in the vertical direction, one end of the spring is located in the first receiving groove 530, and butts against a bottom wall of the first receiving groove 530; and / or, a second receiving groove 531 is provided in a position on a surface of the dose plate 522 close to the slider 521 corresponding to the spring, and in the vertical direction, the other end of the spring is located in the second receiving groove 531, and butts against a bottom wall of the second receiving groove 531. By providing the first receiving groove 530 and / or the second receiving groove 531, the spring may be more stably limited between the dose plate 522 and the slider 521, to avoid a case that the spring shakes and cannot well butt against the dose plate 522 to tightly press against the bottom wall of the powder container 41.

[0172] In an implementation, as shown in FIG. 15 A, FIG. 15B, FIG. 17A, and FIG. 17B, a bottom surface of the sliding groove 514 of the mounting base 51 has a first avoidance groove 517, the second surface 527 of the slider 521 has a second avoidance groove 532 corresponding to the first avoidance groove 517, and the first elastic arm snap 524 is positioned in the second avoidance groove 532, and is suspended through the first avoidance groove 517. It may beunderstood that by suspending the first elastic arm snap 524 in the first avoidance groove 517, the friction between the slider 521 and the mounting base 51 can be further reduced. In another implementation, the first elastic arm snap 524 may alternatively be positioned in contact with the bottom wall of the first avoidance groove 517.

[0173] In an implementation, as shown in FIG. 14A to FIG. 15B, the second surface 527 of the slider 521 is further provided with a convex rib 539. The convex rib 539 protrudes from the second surface of the slider 521 and is positioned corresponding to the sliding groove 514, and the convex rib 539 butts against the bottom surface of the sliding groove 514. It may be understood that, by arranging the convex rib 539 on the second surface of the slider 521, compared with a case that the second surface of the slider 521 is in direct contact with the bottom surface of the sliding groove 514, the contact area between the slider 521 and the sliding groove 514 of the mounting base 51 can be reduced, thereby further reducing a friction between the slider 521 and the mounting base 51. Specifically, as shown in FIG. 14A and FIG. 15B, the quantity of convex ribs 539 is two, and the two convex ribs 539 are spaced apart. In another implementation, any other quantity of, such as one, three, or four, convex ribs 539 may be positioned, or no convex rib 539 may be positioned.

[0174] As shown in FIG. 10, FIG. 13 A to FIG. 15B, and FIG. 20A to FIG. 2 IB, when the dose assembly 52 is in the fifth position, a limitation between the dose assembly 52 and the mounting base 51 is imposed by the first elastic arm snap 524 and the snap-fit portion 513. Further, a resetting convex post 533 is further positioned on a side of the dose assembly 52. Specifically, as shown in FIG. 15A and FIG. 15B, the resetting convex post 533 is positioned on a side of the slider 521 close to the first side surface 515 of the sliding groove 514, and in the vertical direction, the resetting convex post 533 is spaced apart at the top of the first elastic arm snap 524. When the dose assembly 52 is in the fifth position, a top end of the protruding structure 422 of the connecting rod 42 butts against a side surface of the resetting convex post 533 positioned on the slider 521, to limit the dose assembly 52 to the fifth position.

[0175] Specifically, the protruding structure 422 is in the shape of a trapezoid. As shown in FIG. 20A and FIG. 20B, when the dose assembly 52 is in the fifth position, the top surface of the protruding structure 422 butts against the side surface of the resetting convex post 533 to stably limit the dose assembly 52 to the fifth position. That is, when being in the fifth position, the dose assembly 52 is limited mainly in dependence on the protruding structure 422 of the connecting rod 42. In this case, the dose assembly 52 may not be limited by the snap-fit portion513 on the mounting base 51. The snap-fit portion 513 on the mounting base 51 may temporarily limit the dose assembly 52 during assembly, or may limit the dose assembly 52 when butting of the connecting rod 42 against the dose assembly 52 fails, to avoid a problem that the dose assembly 52 is driven by the first elastic member 536 to move and cannot be limited to the fifth position, and consequently the measuring cup 523 cannot be aligned with the powder exit 413 of the powder container 41.

[0176] In a process in which the connecting rod 42 moves from the third position to the fourth position, the connecting rod 42 moves downward in the vertical direction in the air pressing stroke. As shown in FIG. 20A to FIG. 2 IB, butting of the top surface of the protruding structure 422 against the side surface of the resetting convex post 533 gradually changes to butting of the bevel of the protruding structure 422 against the bottom surface of the resetting convex post 533. The protruding structure 422 gradually removes the limitation on the resetting convex post 533 of the slider 521. As the connecting rod 42 moves downward, the protruding structure 422 no longer butts against the resetting convex post 533 after the air pressing stroke ends. In this case, the snap-fit portion 513 on the first side surface 515 of the sliding groove 514 of the mounting base 51 cooperates with the first elastic arm snap 524 on the slider 521, to limit the slider 521 to the fifth position. As the connecting rod 42 continues to move downward in the vertical direction, the protruding structure 422 of the connecting rod 42 starts to come into contact with the first elastic arm snap 524, and squeezes the first elastic arm snap 524 to cause the first elastic arm snap to move toward a side away from the first side surface 515 of the sliding groove 514. As shown in FIG. 18A and FIG. 18B, with the movement of the first elastic arm snap 524, the snap-fit portion 513 on the first side surface 515 of the sliding groove 514 is no longer in contact with and no longer cooperates with the first elastic arm snap 524 on the side surface of the slider 521, so that the snap-fit portion 513 no longer limits the slider 521. That is, the connecting rod 42 moves downward, so that the protruding structure 422 triggers the first elastic arm snap 524 of the slider 521 of the dose assembly 52 to have the limitation removed from the snap-fit portion 513 of the sliding groove 514 of the mounting base 51. After the first elastic arm snap 524 of the slider 521 has the limitation removed, the slider 521 can be driven, so that the dose assembly 52 can move from the fifth position to the sixth position in the first direction Al. After the first elastic arm snap 524 has the limitation removed, the first elastic member 536 drives the dose assembly 52 to quickly move to the sixth position, the measuring cup 523 moves quickly synchronously with the slider 521, and a movement speed of the measuring cup 523 is high, so that the powder in the measuring cup 523 does not easilyleak out. In another implementation, alternatively, a smaller spring may be used to drive the dose assembly 52, and a smaller start thrust is required during resetting of the dose assembly 52, so that thrust optimization can be implemented.

[0177] Specifically, as shown in FIG. 15 A, FIG. 15B, FIG. 18 A, and FIG. 18B, an end of the first elastic arm snap 524 of the slider 521 has a thickened portion 534, and the thickened portion 534 has a bevel. After the air pressing stroke ends, the protruding structure 422 of the connecting rod 42 starts to come into contact with the thickened portion 534 at the end of the first elastic arm snap 524. After the air pressing stroke ends, in a process in which the connecting rod 42 continues to move downward, the protruding structure 422 butts against the bevel of the thickened portion 534 and squeezes the thickened portion 534, so that the first elastic arm snap 524 is away from the snap-fit portion 513 on the first side surface 515 of the sliding groove 514, thereby removing the limitation on the slider 521. Therefore, the dose assembly 52 can move from the fifth position to the sixth position in the first direction Al in the delivery stroke, to deliver the powder in the measuring cup 523 from the position of the powder exit 413 to the position of the airflow channel QI, making it convenient for the powder to subsequently flow through the airflow channel QI and enter the deagglomeration mechanism. As shown in FIG. 19A and FIG. 19B, after the dose assembly 52 moves in place, that is, moves to the sixth position, in a sliding direction of the dose assembly 52, that is, in the first direction Al, the first elastic arm snap 524 is located on a side of the snap-fit portion 513, and the first elastic arm snap 524 crosses the snap-fit portion 513. In this case, the protruding structure 422 of the connecting rod 42 has moved to be located below the thickened portion 534 of the first elastic arm snap 524 of the slider 521.

[0178] In an implementation, referring to FIG. 13B, FIG. 13C, FIG. 18B, FIG. 19B, FIG. 20A, and FIG. 20B, when the dose assembly 52 is in the initial position, that is, at the fifth position, the resetting convex post 533 of the dose assembly 52 butts and limited by the protruding structure 422 of the connecting rod 42. During the downward movement of the connecting rod 42, the protruding structure 422 is no longer in contact with the resetting convex post 533. In addition, during the downward movement of the connecting rod 42, to make it convenient to squeeze the first elastic arm snap 524 of the dose assembly 52 by using the protruding structure 422, to enable the first elastic arm snap to move toward a side away from the first side surface 515 of the sliding groove 514, when the dose assembly 52 is in the fifth position, that is, when the top surface of the protruding structure 422 of the connecting rod 42butts against the side surface of the resetting convex post 533 of the dose assembly 52, as shown in FIG. 13B and FIG. 13C, there is a gap between the first elastic arm snap 524 of the dose assembly 52 and the snap-fit portion 513 of the mounting base 51, to prevent the snap-fit portion 513 from interfering with movement of the first elastic arm snap 524, so that the first elastic arm snap 524 can smoothly move toward the side away from the first side surface 515 of the sliding groove 514, thereby unlocking the dose assembly 52.

[0179] In another implementation, when the dose assembly 52 is in the initial position, that is, the fifth position, the protruding structure 422 of the connecting rod 42 may not butt against the resetting convex post 533 of the dose assembly 52, no gap may be provided between the first elastic arm snap 524 of the dose assembly 52 and the snap-fit portion 513 of the mounting base 51, and the snap-fit portion 513 directly butt against the first elastic arm snap 524, so that the snap-fit portion 513 limits the dose assembly 52; or when the dose assembly 52 is in the initial position, that is, the fifth position, the protruding structure 422 butts against the resetting convex post 533, and the snap-fit portion 513 butts against the first elastic arm snap 524. The first elastic arm snap 524 and the snap-fit portion 513 may alternatively be set in other shapes or manners, provided that it can be ensured that the snap-fit portion 513 does not interfere with movement of the first elastic arm snap 524 during the downward movement of the connecting rod 42, and the limitation on the first elastic arm snap 524 from the snap-fit portion 513 can be smoothly removed.

[0180] Specifically, a surface of the dose plate 522 close to the powder container 41 is provided with a measuring cup 523. The fifth position is a powder filling position, and the sixth position is a powder inhalation position. When the dose assembly 52 is in the fifth position, the powder exit 413 of the powder container 41 is aligned with the measuring cup 523 of the dose plate 522. When the dose assembly 52 is in the sixth position, the measuring cup 523 of the dose plate 522 is unaligned with the powder exit 413 of the powder container 41, and the measuring cup 523 is located on the airflow channel QI. The airway groove 416 at the bottom of the powder container 41 cooperates with the delivery mechanism to form the airflow channel QI. Specifically, the airway groove 416 cooperates with the dose plate 522 to form the airflow channel QI. The dose assembly 52 moves to and fro between the powder exit 413 and the airflow channel QI to deliver the powder in the powder container 41 onto the airflow channel QI. When the dose assembly 52 is in the sixth position, that is, the powder delivery position, the protruding portion 418 on the bottom wall of the airway groove 416 is positionedcorresponding to the measuring cup 523 of the dose assembly 52, and in an airflow direction in the airflow channel QI, a height and a width of the airflow channel QI remain unchanged.

[0181] In the air pressing stroke, when the dose assembly 52 is in the fifth position, the powder in the storage cavity 411 fills the measuring cup 523 of the dose plate 522, and the measuring cup 523 is filled to facilitate quantitative administration. Specifically, the capacity of the measuring cup 523 is in a range of 5 mg to 20 mg. Preferably, the capacity of the measuring cup 523 is 10 mg. A shape of the measuring cup 523 of the dose plate 522 is set corresponding to a shape of the powder exit 413. For example, a cross-sectional shape of the measuring cup 523 is set to a circle or an elliptical racetrack shape corresponding to the powder exit 413, a diameter of the circular measuring cup 523 ranges from 0.5 mm to 5 mm, and the measuring cup 523 in the elliptical racetrack shape has a length ranging from 3 mm to 10 mm and a width ranging from 2 mm to 5 mm. A longitudinal-section shape of the measuring cup 523 may be a circular arc shape or a conical shape, and a maximum depth of the measuring cup 523 in the circular arc shape ranges from 0.5 mm and 3 mm, which can ensure filling stability and emptying consistency of the powder in the measuring cup 523. When the dose assembly 52 is in the fifth position, a maximum distance between the powder exit 413 of the powder container 41 and the bottom of the measuring cup 523 ranges from 1 mm and 2 mm, to avoid waste during powder filling. In the delivery stroke, a movement stroke of the dose assembly 52 during movement from the fifth position to the sixth position is in a range of 2 mm to 10 mm.

[0182] Specifically, as shown in FIG. 17A to FIG. 17D and FIG. 22A to FIG. 24B, the mounting base 51 is provided with a powder inlet 518, an end of the powder inlet 518 extends to a surface of the mounting base 51 close to the powder container 41, and an end of the airflow channel QI communicates with the powder inlet 518. Specifically, an end of the airflow channel QI away from the air inlet port 417 communicates with the powder inlet 518. When the dose assembly 52 is in the sixth position, the dose plate 522 is positioned corresponding to the position of the powder inlet 518, and the measuring cup 523 of the dose plate 522 is located in the airflow channel QI, to deliver the powder in the measuring cup 523 to the inside of the deagglomeration mechanism through the airflow channel QI and the powder inlet 518 when the user inhales. Specifically, a position of a corner of a port of the powder inlet 518 close to an end of the powder container 41 is provided with a chamfer. The chamfer may be a round or a bevel. Preferably, the port of the powder inlet 518 is provided with a round close to an endof the airflow channel QI. It may be understood that an airflow direction changes abruptly when the airflow flows through the airflow channel QI and enters the powder inlet 518. A chamfer is positioned in the position of the corner of the port of the powder inlet 518, so that the port of the powder inlet 518 can smoothly transition through an arc surface at the corner, the airflow can be buffered, and generation of an eddy can be reduced, thereby avoiding a problem that the powder is wasted because the powder jams and remains in the position of the corner of the port of the powder inlet 518.

[0183] As shown in FIG. 15 A, FIG. 15B, and FIG. 22A to FIG. 24B, in an implementation, the dose assembly 52 further includes a squeezing elastic arm 535. The squeezing elastic arm 535 has one end connected to the first limiting wall 528 of the slider 521, and the other end configured to butt against the dose protection plate 61 of the trigger mechanism. Specifically, the dose protection plate 61 of the trigger mechanism is movable to and fro between a seventh position and an eighth position. As shown in FIG. 22A and FIG. 22B, when the dose assembly 52 is in the fifth position and the dose protection plate 61 is in the seventh position, the other end of the squeezing elastic arm 535 butts against the dose protection plate 61 to limit the dose protection plate 61 to the seventh position, and the squeezing elastic arm 535 butts against the dose protection plate 61 to be attached to a side surface of the third receiving groove 419 close to the powder exit 413 and at the bottom of the powder container 41, to avoid a case that the powder enters a gap between the dose protection plate 61 and the side surface of the third receiving groove 419 close to the powder exit 413 during powder filling, causing waste such as powder jamming or powder leakage.

[0184] In an implementation, a blocking structure (not shown) is further positioned on the mounting base 51. During resetting of the dose assembly 52, the protruding structure 422 of the connecting rod 42 butts against the resetting convex post 533, so that the dose assembly 52 moves from the sixth position to the fifth position. When the dose assembly 52 moves to the fifth position, the blocking structure limits the dose assembly 52 to ensure that the dose assembly 52 is reset in place, so that the measuring cup 523 is aligned with the powder exit 413 to ensure a filling effect during powder filling. Because the squeezing elastic arm 535 is an elastic structure, on the basis of ensuring that the dose assembly 52 is reset in place, the dose protection plate 61 is squeezed by the squeezing elastic arm 535, and is reset in place. That is, during the resetting, it needs to be effectively ensured that the dose assembly 52 is reset in place.

[0185] Further, the delivery mechanism further includes a first elastic member 536. The first elastic member 536 may be a first torsion spring. An end of the first torsion spring butts against the first limiting wall 528 of the slider 521 to drive the slider 521 to slide from the fifth position to the sixth position. Specifically, a mounting post 410 (as shown in FIG. 11B) is positioned on the powder container 41. The first torsion spring is sleeved and mounted on the mounting post 410. The first torsion spring has a fixed arm and a driving arm. The fixed arm fixedly butts against the powder container 41. The driving arm butts against the first limiting wall 528 of the slider 521. As shown in FIG. 14A to FIG. 15B, in an implementation, the first limiting wall 528 of the slider 521 has a third avoidance groove 537. When the slider 521 is in the fifth position, the top of the first limiting wall 528 butts against an end of the first torsion spring and squeezes the first torsion spring to bend, so that the first torsion spring elastically deforms and accumulates elastic potential energy, to make it convenient to drive the dose assembly 52 to move from the fifth position to the sixth position after the limitation on the dose assembly 52 is removed. When the slider 521 is in the sixth position, the first torsion spring releases elastic potential energy, and an end of the first torsion spring is located in the third avoidance groove 537. It may be understood that the third avoidance groove 537 is a groove relative to the first limiting wall 528, and the third avoidance groove 537 may be formed by directly grooving the surface of the first limiting wall 528. In another implementation, a protrusion may alternatively be positioned on the surface of the first limiting wall 528 to form a third avoidance groove 537 between the protrusion and the first limiting wall 528.

[0186] Referring to FIG. 22A to FIG. 24B, specifically, as shown in FIG. 22A and FIG. 22B, when the slider 521 is in the fifth position, an upper portion of the driving arm of the first torsion spring butts against the first limiting wall 528 of the slider 521, an arm of force is small, and a thrust is large, so that the dose assembly 52 can be quickly driven to move; and as shown in FIG. 23 and FIG. 24B, when the slider 521 is in the sixth position, a lower portion of the driving arm of the first torsion spring butts against the first limiting wall 528 of the slider 521. Specifically, the lower portion of the driving arm of the first torsion spring butts against the side wall of the third avoidance groove 537 of the first limiting wall 528, an arm of force is large, and a thrust is small, so that the torque in the cover closing process can be effectively reduced. It may be understood that, by providing the third avoidance groove 537, the pressure of the first torsion spring may be adjusted, to avoid a problem that the first torsion spring extends maximally and has no effect or an end of the driving arm of the first torsion spring scratches the first limiting wall 528 to generate debris to be inhaled by the user. In addition,the arm of force of the first torsion spring may also be adjusted, so that the slider 521 can move from the fifth position to the sixth position more smoothly. Preferably, the third avoidance groove 537 is a through hole, so that a state of a structure such as the dose protection plate 61 of the internal trigger mechanism can be easily observed through the third avoidance groove 537. In another implementation, the third avoidance groove 537 may alternatively be set to a blind hole, which may be designed as required.

[0187] In another implementation, the third avoidance groove 537 may not be provided on the first limiting wall 528 of the slider 521, an end of the first torsion spring is bent to form a smooth transition portion, and the smooth transition portion of the first torsion spring butts against the first limiting wall 528 of the slider 521 to drive the dose assembly 52 to move from the fifth position to the sixth position. By bending an end of the first torsion spring to form a smooth transition portion, a problem that an end of the driving arm of the first torsion spring directly butts against the first limiting wall 528 of the slider 521 and therefore scratches the first limiting wall 528 to generate debris can be avoided.

[0188] In another implementation, the first torsion spring may be a compression spring or an extension spring, or the first torsion spring may be set to a structure such as an elastic piece or an elastic arm, as long as the dose assembly 52 can be driven to move from the fifth position to the sixth position.

[0189] In another implementation, the delivery mechanism may alternatively be set in another structural form, and the delivery mechanism may not move from the fifth position to the sixth position in a manner of sliding or translating. For example, the delivery mechanism may be set to a rotating structure, and the measuring cup 523 rotates from a position corresponding to the powder exit 413 (that is, a powder filling position) to a position corresponding to the powder inlet 518 (that is, a powder inhalation position) in a rotating manner, so that the measuring cup 523 is located in the airflow channel QI . Specifically, before the dose assembly 52 rotates from the fifth position to the sixth position, the dose assembly 52 may be limited to the fifth position by using another structural member, or the limitation on the dose assembly 52 may be removed by using another structural member. For example, the dose assembly 52 may not include the first elastic arm snap 524, and the mounting base 51 may not include the snap-fit portion 513. The dose assembly 52 may be limited and the limitation on the dose assembly 52 may be removed through cooperation between a plurality of structural members. In the delivery stroke, the dose assembly 52 may still be driven to rotate by usingthe accumulated elastic potential energy of the elastic member. As long as the limitation on the dose assembly 52 can be removed and the delivery mechanism can be driven to move by using the elastic stored energy, to implement the powder delivery function, the specific structure may be designed as required.

[0190] In a cover closing process of the outer cover 2, that is, in a process of rotating the outer cover 2 from the second position to the first position, the cam 22 of the outer cover 2 butts against the connecting rod 42 and moves upward, so that the connecting rod 42 moves from the fourth position to the third position to implement resetting. In this process, the protruding structure 422 of the connecting rod 42 butts against the resetting convex post 533 of the slider 521 again. Specifically, the bevel of the protruding structure 422 gradually butts against the bottom surface of the resetting convex post 533 of the slider 521 again. As the connecting rod 42 moves upward, the bevel of the protruding structure 422 presses the resetting convex post 533 to drive the dose assembly 52 to move from the sixth position to the fifth position. When the connecting rod 42 is reset to the first position, the top surface of the protruding structure 422 butts against the side surface of the resetting convex post 533 again, so that the dose assembly 52 is reset to the fifth position. That is, during the reset movement of the connecting rod 42 from the fourth position to the third position, the dose assembly 52 is driven to be reset from the sixth position to the fifth position.

[0191] In an implementation, as shown in FIG. 17A to FIG. 17D, a pressure relief opening 519 is further provided on the mounting base 51. The pressure relief opening 519 has one end aligned and communicating with an end of the pressure relief hole 414 away from the air capsule 44, and the other end extending to the second side surface 516 of the sliding groove 514. The second side surface 516 is positioned opposite to the first side surface 515. Before the slider 521 of the delivery mechanism moves, that is, before the delivery stroke starts (in the air pressing stroke), the side surface of the slider 521 blocks a port 5191 of the pressure relief opening 519 of the mounting base 51 extending into the sliding groove 514 (as shown in FIG. 17C and FIG. 17D), and the measuring cup 523 of the dose plate 522 is positioned corresponding to the powder exit 413 (as shown in FIG. 22A and FIG. 22B). After the air capsule 44 is compressed in the air pressing stroke, air enters the storage cavity 411 for air pressing, so that the powder in the storage cavity 411 smoothly fills the measuring cup 523. In the delivery stroke, after the slider 521 moves, the measuring cup 523 is misaligned with the powder exit 413 (as shown in FIG. 23 to FIG. 24B), the dose plate 522 blocks the powder exit413, the side surface of the slider 521 no longer blocks the port 5191 of the pressure relief opening 519 of the mounting base 51 extending into the sliding groove 514, and the port 5191 of the pressure relief opening 519 on the mounting base 51 is exposed. When the air capsule 44 is compressed, air between the air capsule 44 and the waterproof breathable film 46 is discharged after passing through the pressure relief hole 414 and the pressure relief opening 519, to relieve the pressure of the storage cavity 411.

[0192] Referring to FIG. 17A to FIG. 17F, the delivery mechanism further includes a second elastic arm snap 538, and the second elastic arm snap 538 is configured to limit the dose protection plate 61 of the trigger mechanism to the seventh position. Specifically, as shown in FIG. 17C to FIG. 17F, in an implementation, the mounting base 51 includes a second elastic arm snap 538. The second elastic arm snap 538 is positioned at an end of the mounting base 51 close to the powder container 41. Before the trigger mechanism is triggered, the second elastic arm snap 538 is in a normal state, and the second elastic arm snap 538 limits the dose protection plate 61 of the trigger mechanism to the seventh position. After the trigger mechanism is triggered, the second elastic arm snap 538 may be squeezed by the trigger mechanism, so that the second elastic arm snap 538 deforms, thereby removing the limitation on the dose protection plate 61. Therefore, the dose protection plate 61 can be driven to move from the seventh position to the eighth position.

[0193] In another implementation, alternatively, the second elastic arm snap 538 may not be positioned on the mounting base 51. For example, the second elastic arm snap 538 may be positioned on the dose protection plate 61. For example, the dose protection plate 61 may be partially made into an elastic structure to be uses as the second elastic arm snap 538. Alternatively, an elastic arm is directly added to the dose protection plate 61 to be uses as the second elastic arm snap 538. Alternatively, the dose protection plate 61 may be partially hollowed to reduce stiffness, to form the second elastic arm snap 538. The second elastic arm snap 538 on the dose protection plate 61 cooperates with the mounting base 51 to limit the dose protection plate 61 to the seventh position. The second elastic arm snap 538 on the dose protection plate 61 is squeezed by the trigger mechanism to remove the limitation on the dose protection plate 61, so that the dose protection plate 61 can be driven to move from the seventh position to the eighth position.(3) Trigger mechanism

[0194] Referring to FIG. 25 to FIG. 41, FIG. 25 is a schematic structural diagram of a trigger mechanism of a powder inhalation device according to this disclosure in a state, FIG. 28 is a schematic structural diagram of a trigger mechanism of a powder inhalation device according to this disclosure in another state, FIG. 32A is a schematic structural diagram of a pawl of the trigger mechanism provided in FIG. 25 from an angle, FIG. 32B is a schematic structural diagram of the pawl provided in FIG. 32A from another angle, FIG. 33A is a schematic structural diagram of an air inlet baffle of the trigger mechanism provided in FIG. 25 from an angle in an implementation, FIG. 33B is a schematic structural diagram of the air inlet baffle provided in FIG. 33A from another angle, FIG. 33C is a schematic structural diagram of an air inlet baffle of the trigger mechanism provided in FIG. 25 from an angle in another implementation, FIG. 34A is a schematic structural diagram of a bracket of the trigger mechanism provided in FIG. 25 from an angle, FIG. 34B is a schematic structural diagram of the bracket provided in FIG. 34A from another angle, FIG. 35 A is a schematic diagram of an assembly structure of an air inlet baffle and a bracket of the trigger mechanism provided in FIG. 25 in a state from an angle in an implementation, FIG. 35B is a schematic cross-sectional view of assembling the air inlet baffle and the bracket provided in FIG. 35 A, FIG. 35C is a schematic cross-sectional view of assembling an air inlet baffle and a bracket of the trigger mechanism provided in FIG. 25 in another implementation, FIG. 36 is a schematic diagram of an assembly structure of an air inlet baffle and a bracket of the trigger mechanism provided in FIG. 25 in another state from an angle, FIG. 37 is a schematic diagram of an assembly structure of an air inlet baffle and a bracket of the trigger mechanism provided in FIG. 25 in still another state from an angle, FIG. 38 is a schematic structural diagram of a dose protection plate of the trigger mechanism provided in FIG. 25, FIG. 39A is a schematic diagram of an assembly structure of the dose protection plate provided in FIG. 38 and a delivery mechanism in a state, FIG. 39B is a schematic diagram of an assembly structure of the dose protection plate provided in FIG. 38 and a delivery mechanism in another state, FIG. 40A is a schematic diagram of an assembly structure of a pawl and a connecting rod of a powder inhalation device according to this disclosure in a state, FIG. 40B is a schematic diagram of an assembly structure of a pawl and a connecting rod of a powder inhalation device according to this disclosure in another state, FIG. 40C is a schematic diagram of an assembly structure of a pawl and a connecting rod of a powder inhalation device according to this disclosure in another state, FIG. 40D is a schematic diagram of an assembly structure of a pawl and a connecting rod of a powder inhalation device according to this disclosure in another state, and FIG. 41 is a schematic structural diagram of a lower housing of the powder inhalation device provided in FIG. 1.

[0195] Referring to FIG. 25 to FIG. 41, the trigger mechanism includes a dose protection plate 61, a pawl 62, an air inlet baffle 63, a bracket 64, a second elastic member 65, a third elastic member 66, and a fourth elastic member 67. The dose protection plate 61 can move to and fro from the seventh position to the eighth position, blocks, in the seventh position, the measuring cup 523 of the dose assembly 52, and unblocks, in the eighth position, the measuring cup 523 of the dose assembly 52, so that the measuring cup 523 is exposed in the airflow channel QI. The second elastic member 65 is configured to provide power for the dose protection plate 61 to move from the seventh position to the eighth position. The pawl 62 is rotatably connected to the mounting base 51, and the pawl 62 can rotate to and fro between a ninth position and a tenth position. The fourth elastic member 67 is configured to provide power for the pawl 62 to rotate from the ninth position to the tenth position. The air inlet baffle 63 is rotatably positioned on the bracket 64. The bracket 64 has a trigger air inlet channel 641. The air inlet baffle 63 can rotate between an eleventh position and a twelfth position, and blocks, in the eleventh position, the trigger air inlet channel 641. The third elastic member 66 is configured to limit the air inlet baffle 63 to the eleventh position, and provide power for the air inlet baffle 63 to perform reset rotation from the twelfth position to the eleventh position when the air inlet baffle 63 is in the twelfth position. The second elastic member 65, the third elastic member 66, and the fourth elastic member 67 may each be a torsion spring.

[0196] Specifically, referring to FIG. 25 to FIG. 33C, the pawl 62 includes a first rotating shaft 621, the first rotating shaft 621 of the pawl 62 is assembled on the mounting base 51, and the pawl 62 can rotate about the first rotating shaft 621 to and fro between the ninth position and the tenth position. The air inlet baffle 63 includes a second rotating shaft 631. The second rotating shaft 631 of the air inlet baffle 63 is mounted on the bracket 64. The second rotating shaft 631 and the first rotating shaft 621 are positioned across each other. Preferably, the second rotating shaft 631 is positioned perpendicularly to the first rotating shaft 621. The second rotating shaft 631 extends in the vertical direction. The first rotating shaft 621 extends in the second direction A2. The air inlet baffle 63 can rotate about the second rotating shaft 631 between the eleventh position and the thirteenth position. The air inlet baffle 63 passes the twelfth position when rotating from the eleventh position to the thirteenth position. When the air inlet baffle 63 is in the eleventh position, the pawl 62 is limited to the ninth position. When the air inlet baffle 63 is in the twelfth position, the limitation on the pawl 62 is removed, so that the pawl 62 rotates from the ninth position to the tenth position, to trigger the dose protection plate 61 to move from the seventh position to the eighth position.

[0197] Specifically, as shown in FIG. 33A to FIG. 37, the air inlet baffle 63 further includes a door plate 632 connected to one side of the second rotating shaft 631 and a swing member 633 connected to the other side of the second rotating shaft 631. The second rotating shaft 631 of the air inlet baffle 63 is positioned outside a side wall of the trigger air inlet channel 641. The door plate 632 has one part positioned inside the trigger air inlet channel 641 and the other part extending to the second rotating shaft 631. The door plate 632 includes a first separation portion 630. When the air inlet baffle 63 rotates between the eleventh position and the twelfth position, the first separation portion 630 cooperates with the side wall of the trigger air inlet channel 641, to block the trigger air inlet channel 641.

[0198] It may be understood that, to maintain stability of the trigger mechanism, the elastic force of the third elastic member 66 is usually increased. However, with the increase in the elastic force of the third elastic member 66, a larger inhalation force is required to trigger the door plate 632 to rotate when a user inhales. By setting the door plate 632 to the foregoing structure, the torque for rotation of the door plate 632 can be increased, so that an disclosure portion of air pressure is farther from the second rotating shaft 631, and has a higher force effect and is more stable, and the user ca trigger, with a small inhalation force, the door plate 632 to rotate to open the trigger air inlet channel 641. In addition, as the torque is increased, the elastic force of the third elastic member 66 can be increased, and an anti -interference capability of the entire structure of the trigger mechanism is improved. Meanwhile, by disposing the first separation portion 630, when the air inlet baffle 63 rotates between the eleventh position and the twelfth position, the first separation portion 630 may cooperate with the side wall of the trigger air inlet channel 641 to block the trigger air inlet channel 641, thereby providing more reliable sealing for the trigger air inlet channel 641 during rotation of the air inlet baffle 63 from the eleventh position to the twelfth position, to avoid a problem that the trigger air inlet channel 641 is partially opened when the air inlet baffle 63 does not rotate to the twelfth position (that is, rotates by only a small angle), and consequently when the user inhales, even if an inhalation airflow amount reaches a preset threshold, it is still hard to completely trigger the air inlet baffle 63, and consequently the trigger air inlet channel 641 cannot be completely opened.

[0199] Specifically, as shown in FIG. 33 A to FIG. 35B, in some implementations, the bracket 64 has a second separation portion 640, and the second separation portion 640 has a second arc surface 649. By disposing the first separation portion 630 and the second separation portion640, when the air inlet baffle 63 rotates between the eleventh position and the twelfth position, the first separation portion 630 of the door plate 632 cooperates with the second arc surface 649 of the second separation portion 640, to block the trigger air inlet channel 641, so as to improve sealing reliability of the trigger air inlet channel 641.

[0200] Specifically, as shown in FIG. 33A to FIG. 33B, and FIG. 34A to FIG. 35B, in an implementation, the door plate 632 of the air inlet baffle 63 includes a connecting portion 634, a bent portion 635, and a blocking portion 636. A first end of the connecting portion 634 is connected to the second rotating shaft 631. A second end of the connecting portion 634 is connected to a first end of the bent portion 635. The blocking portion 636 is located on a side of the bent portion 635 away from the connecting portion 634 and is connected to a second end of the bent portion 635. In this implementation, the bent portion 635 is uses as the first separation portion 630. As shown in FIG. 35B, the second separation portion 640 is located on a side of the bent portion 635 close to the second rotating shaft 631. When the air inlet baffle 63 is in the eleventh position, the blocking portion 636 and the bent portion 635, that is, the first separation portion 630, are both located in the trigger air inlet channel 641 to block the trigger air inlet channel 641 of the bracket 64.

[0201] Referring to FIG. 25, FIG. 28, and FIG. 33A to FIG. 37, the trigger air inlet channel 641 of the bracket 64 has a top wall and an annular side wall. The top wall of the trigger air inlet channel 641 has an air inlet 642. When the air inlet baffle 63 is in the eleventh position, the blocking portion 636 of the air inlet baffle 63 blocks the trigger air inlet channel 641. As shown in FIG. 35B, in a specific implementation, when the air inlet baffle 63 is in the eleventh position, the blocking portion 636 blocks the air inlet 642. The annular side wall of the trigger air inlet channel 641 includes a first side wall 643 and a second side wall 644 that are oppositely positioned in an extension direction of the second rotating shaft 631, and a third side wall 645 and a fourth side wall 646 that are oppositely positioned in a direction perpendicular to the second rotating shaft 631. The third side wall 645 is located on a side of the fourth side wall 646 away from the second rotating shaft 631. In an implementation, the fourth side wall 646 is uses as the second separation portion 640.

[0202] In an implementation, as shown in FIG. 34A and FIG. 34B, an edge of the first side wall 643 away from the top wall has a first air inlet groove 647. Specifically, the first air inlet groove 647 is a notch provided on the first side wall 643. In another implementation, an edge of the second side wall 644 away from the top wall may be provided with a first air inlet groove647, or an edge of the second side wall 644 away from the top wall and an edge of the first side wall 643 away from the top wall may be each provided with a first air inlet groove 647. It may be understood that, by disposing the first air inlet groove 647 at the edge of the first side wall 643 and / or the second side wall 644 away from the top wall, in a trigger process, air intake can be performed without requiring the air inlet baffle 63 to rotate to form a gap between an end of the door plate 632 and the third side wall 645. Air intake can be performed in advance when the air inlet baffle 63 rotates to form a gap between a side edge of the door plate 632 and the first air inlet groove 647 (as shown in FIG. 36 and FIG. 37), so that air intake can be implemented more rapidly, which is more beneficial to implementation of a trigger function.

[0203] Preferably, as shown in FIG. 34 A and FIG. 34B, the first air inlet groove 647 is a V- shaped groove. An angle between two side surfaces of the first air inlet groove 647 is the same as an angle between the blocking portion 636 and the bent portion 635. That is, a shape of the first air inlet groove 647 matches a shape formed by connecting the blocking portion 636 and the bent portion 635 of the air inlet baffle 63, so that in a trigger process, during rotation of the air inlet baffle 63 from the eleventh position to the thirteenth position, a gap is formed between the door plate 632 and the first air inlet groove 647 more rapidly, and the size of the formed gap is substantially kept consistent, thereby facilitating uniformity of air intake. In another implementation, the first air inlet groove 647 may alternatively be set to another shape, for example, any shape such as a rectangle, a square, or a rhombus. The shape of the first air inlet groove 647 may not match the shape formed by connecting the blocking portion 636 and the bent portion 635 of the air inlet baffle 63, provided that during rotation of the air inlet baffle 63 from the eleventh position to the twelfth position, the first air inlet groove 647 may form a gap with a side edge of the door plate 632, and air intake can be performed in advance.

[0204] In an implementation, as shown in FIG. 34A and FIG. 34B, an edge of the third side wall 645 of the bracket 64 away from the top wall has a second air inlet groove 648. Specifically, the second air inlet groove 648 is a notch provided in the edge of the third side wall 645 away from the top wall. During trigger and inhalation of the trigger mechanism, the second air inlet groove 648 may play a role in pressure stabilization during opening of the air inlet baffle 63. When the air inlet baffle 63 rotates to the twelfth position, the swing member 633 of the air inlet baffle 63 is separated from the first butting portion 6241 of the second cantilever 624 of the pawl 62, thereby removing the limitation on the pawl 62. In this case, the second air inlet groove 648 is opened, but the door plate 632 is still located between the firstside wall 643 and the second side wall 644, a gap is still not formed between an end of the door plate 632 and the third side wall 645, and the airflow enters the air inlet 642 only through the second air inlet groove 648 (as shown in FIG. 36). Stability of the trigger flow amount can be further improved by disposing the second air inlet groove 648. The essence of the second air inlet groove 648 is to relieve the pressure in advance, which is equivalent to setting a threshold of the air intake flow amount. Only when the air intake flow amount is sufficiently large, the air inlet baffle 63 can be pushed to completely open the trigger air inlet channel 641, to avoid a case that the air inlet baffle 63 is opened under a small pressure or inertia when the trigger flow amount is excessively small or the air intake flow amount suddenly decreases.

[0205] In an implementation, the annular side wall of the bracket 64 is provided with both a first air inlet groove 647 and a second air inlet groove 648. During rotation of the air inlet baffle 63 from the eleventh position to the thirteenth position, the second air inlet groove 648 on the third side wall 645 is first partially opened, and then the first air inlet groove 647 on the first side wall 643 and / or the second side wall 644 is partially opened (as shown in FIG. 37). That is, the second air inlet groove 648 needs to be opened before the first air inlet groove 647. In another implementation, alternatively, only the first air inlet groove 647, or only the second air inlet groove 648 may be provided on the bracket 64.

[0206] In an implementation, referring to FIG. 33A, FIG. 33B, and FIG. 34A to FIG. 35B, the first separation portion 630, that is, the bent portion 635 has a first arc surface 637. When the air inlet baffle 63 is in the eleventh position, the first arc surface 637 is positioned opposite to the second arc surface 649. When the air inlet baffle 63 rotates between the eleventh position and the twelfth position, the first separation portion 630, that is, the bent portion 635, is located in the trigger air inlet channel 641, and the first arc surface 637 cooperates with the second arc surface 649 of the second separation portion 640, that is, the fourth side wall 646, to block the trigger air inlet channel 641. Specifically, referring to FIG. 33 A, FIG. 33B, and FIG. 34A to FIG. 35B, each of the bent portion 635 and the fourth side wall 646 is in an arc shape. A surface of the bent portion 635 of the air inlet baffle 63 close to the connecting portion 634 is the first arc surface 637. The first arc surface 637 can improve the pneumatic moment of the air inlet baffle 63 during rotation, and the increase in the pneumatic moment can improve the elastic force that the third elastic member 66 applies to the air inlet baffle 63, which is beneficial to improving the anti -interference capability of the trigger mechanism and the structural stability. In addition, the size of the baffle 78 can be reduced while the original pneumatic moment ismaintained, which is beneficial to saving space. An inner surface of the fourth side wall 646 of the bracket 64 is the second arc surface 649, and each of the first arc surface 637 and the second arc surface 649 is a circular arc surface whose circle center is located on the axis of the second rotating shaft 631. Specifically, a radian of a circular arc corresponding to the first arc surface 637 and the second arc surface 649 range from 30 degrees to 60 degrees. In another implementation, a radian of a circular arc corresponding to the first arc surface 637 and the second arc surface 649 may alternatively be set to another value, and the bent portion 635 and the fourth side wall 646 may alternatively be set to any other shape, as long as it is ensured that the bent portion 635 has the first arc surface 637 and the inner surface of the fourth side wall 646 is the second arc surface 649, and therefore the first arc surface 637 and the second arc surface 649 can cooperate to seal the trigger air inlet channel 641.

[0207] In another implementation, as shown in FIG. 33C and FIG. 35C, the door plate 632 includes a connecting portion 634, a blocking portion 636, and a first separation portion 630. That is, the door plate 632 does not include a bent portion 635. The connecting portion 634 has a first end connected to the second rotating shaft 631 and a second end directly connected to the blocking portion 636. The first separation portion 630 is located on a side of the blocking portion 636 close to the second rotating shaft 631. Specifically, a first end of the first separation portion 630 may be connected to the connecting portion 634, and more specifically may be connected to a surface of the connecting portion 634 that faces the air inlet 642.

[0208] Alternatively, a first end of the first separation portion 630 may be connected to the blocking portion 636, and specifically may be connected to a surface of the blocking portion 636 that faces the air inlet 642. Alternatively, a first end of the first separation portion 630 may be connected to a connection position between the blocking portion 636 and the connecting portion 634; and a second end of the first separation portion 630 is a free end. As shown in FIG. 35C, in a specific implementation, a first end of the first separation portion 630 is connected to a connection position between the blocking portion 636 and the connecting portion 634, and the first separation portion 630 is located on a side of the second separation portion 640 away from the second rotating shaft 631. A second end of the first separation portion 630 extends toward a top wall of the trigger air inlet channel 641. When the air inlet baffle 63 is in the eleventh position, the blocking portion 636 and the first separation portion 630 are both located in the trigger air inlet channel 641.

[0209] Specifically, as shown in FIG. 33C and FIG. 35C, in an implementation, the fourth side wall 646 is uses as the second separation portion 640, each of the fourth side wall 646 and the first separation portion 630 is in an arc shape, a surface of the first separation portion 630 facing the fourth side wall 646 is the first arc surface 637, and an inner surface of the fourth side wall 646 is the second arc surface 649. Preferably, the first arc surface 637 and the second arc surface 649 are both circular arc surfaces. More preferably, the first arc surface 637 and the second arc surface 649 are both circular arc surfaces whose circle centers are located on the axis of the second rotating shaft 631. When the air inlet baffle 63 is in the eleventh position, the door plate 632 blocks the trigger air inlet channel 641, and the first arc surface 637 is attached to the second arc surface 649 to block and seal the trigger air inlet channel 641.

[0210] In another implementation, the first separation portion 630 may alternatively be positioned on a side of the second separation portion 640, that is, the fourth side wall 646 close to the second rotating shaft 631. When the air inlet baffle 63 is in the eleventh position, the blocking portion 636 is located inside the trigger air inlet channel 641, and the first separation portion 630 is located outside the trigger air inlet channel 641. In this case, a surface of the first separation portion 630 that faces the fourth side wall 646 is the first arc surface 637, and an outer surface of the fourth side wall 646 is the second arc surface 649. Alternatively, the first separation portion 630 and the second separation portion 640 may be set in other shapes, and a second end of the first separation portion 630 may extend in another direction. Specifically, the first separation portion 630 and the second separation portion 640 may not be in an arc shape, as long as it is only ensured that the first separation portion 630 has the first arc surface 637, the second separation portion 640 has the second arc surface 649, and during rotation of the air inlet baffle 63 from the eleventh position to the twelfth position, the first arc surface 637 cooperates with the second arc surface 649. Alternatively, the second separation portion 640 may be set to a structure independent of the fourth side wall 646. Alternatively, the quantity of first separation portions 630 and the quantity of second separation portions 640 are correspondingly set to another quantity. For example, two, three, or four first separation portions 630 and second separation portions 640 may be correspondingly set, provided that each first separation portion 630 and a corresponding second separation portion 640 can cooperate well.

[0211] In another implementation, each of the first separation portion 630 and the second separation portion 640 may alternatively be set to any other shape. The first separation portion630 may not have the first arc surface 637, or the second separation portion 640 may not have the second arc surface 649. For example, the first separation portion 630 may be set to a sealing structural member. When the air inlet baffle 63 is in the eleventh position, the first separation portion 630 may be located inside the trigger air inlet channel 641, or may be located outside the trigger air inlet channel 641. The first separation portion 630 has a first end connected to the blocking portion 636 or the connecting portion 634, and a second end that is set to a free end and may extend in a broken line or curved line or straight line in any direction. A contact may be positioned at the second end of the first separation portion 630. When the air inlet baffle 63 is in the eleventh position, the contact at the second end of the first separation portion 630 butts against a surface of the second separation portion 640. When the air inlet baffle 63 rotates between the eleventh position and the twelfth position, the contact at the second end of the first separation portion 630 continuously keeps butting against the surface of the second separation portion 640, to block and seal the trigger air inlet channel 641. That is, the first separation portion 630 and the second separation portion 640 do not necessarily seal the trigger air inlet channel 641 through cooperation between the first arc surface 637 and the second arc surface 649, and may seal the trigger air inlet channel through point contact or in any other manner.

[0212] A specific structure of the first separation portion 630 and a specific structure of the fourth side wall 646 or the second separation portion 640 may be designed according to requirements. This is not limited in this disclosure, provided that when the air inlet baffle 63 rotates between the eleventh position and the twelfth position, the first separation portion 630 can cooperate with the side wall of the trigger air inlet channel 641, to block the trigger air inlet channel 641. As shown in FIG. 35 A, FIG. 35B, and FIG. 35C, when the air inlet baffle 63 is in the eleventh position, the door plate 632 blocks the trigger air inlet channel 641, and the first arc surface 637 is attached to the second arc surface 649. It may be understood that the attachment between the first arc surface 637 and the second arc surface 649 can ensure more reliable sealing of the trigger air inlet channel 641, to avoid a problem that because the first arc surface 637 and the second arc surface 649 are not positioned, the trigger air inlet channel 641 is opened when the air inlet baffle 63 rotates from the eleventh position to the twelfth position by only a small angle, that is, when the air inlet baffle 63 does not rotate to the twelfth position, airflow flows out from the gap between the blocking portion 636 and the fourth side wall 646, and consequently when a user inhales, even if an inhalation airflow amount reaches a preset threshold, it is still difficult to completely trigger the air inlet baffle 63 to rotate to the thirteenthposition, and consequently the trigger air inlet channel 641 cannot be completely opened, and the trigger mechanism cannot implement an inhalation trigger function.

[0213] Further, in an implementation, as shown in FIG. 33 A, FIG. 33B, and FIG. 34A to FIG. 35B, the door plate 632 of the air inlet baffle 63 further includes a reinforcing portion 650. The reinforcing portion 650 has a first edge connected to the blocking portion 636 and a second edge connected to the bent portion 635. The blocking portion 636 and the bent portion 635 may be reinforced through the arrangement, to improve structural strength and stability of the air inlet baffle 63. Specifically, a third edge of the reinforcing portion 650 extends from a second end of the connecting portion 634 to a surface of the blocking portion 636 in an extension direction of the connecting portion 634. Through the foregoing arrangement, a force applied to the blocking portion 636 may be directly conducted to the connecting portion 634.

[0214] Further, as shown in FIG. 33A to FIG. 33B, the swing member 633 of the air inlet baffle 63 further includes a weight 638. By arranging the weight 638, when the powder inhalation device 100 is lying flat, the door plate 632 is prevented from being opened under the gravity. When the powder inhalation device 100 is lying flat, the suction nozzle 13 faces upward.

[0215] Specifically, as shown in FIG. 32A to FIG. 32B, the pawl 62 further includes a plate body 622 and a first cantilever 623. The first rotating shaft 621 of the pawl 62 is positioned substantially perpendicular to the plate body 622. It should be noted that "substantially perpendicular" indicates that an angle between the first rotating shaft 621 and the plate body 622 ranges from 80° to 100°. Preferably, the first rotating shaft 621 is positioned perpendicular to the plate body 622, and the plate body 622 is positioned substantially parallel to the vertical direction. The first cantilever 623 has one end connected to the plate body 622 and the other end provided with a hook 6231. The hook 6231 is configured to drive a ones counting wheel 82 of the counting mechanism to move, so as to implement a counting function.

[0216] Further, referring to FIG. 25 to FIG. 32B, the pawl 62 further includes a second cantilever 624. The second cantilever 624 has one end connected to the plate body 622 and the other end provided with a first butting portion 6241.

[0217] Before the trigger mechanism is triggered, when the air inlet baffle 63 is in the eleventh position, as shown in FIG. 26A and FIG. 26B, the swing member 633 butts against the first butting portion 6241 of the second cantilever 624 of the pawl 62, to limit the pawl 62to the ninth position. After the trigger mechanism is triggered, when the air inlet baffle 63 rotates to the twelfth position, the swing member 633 of the air inlet baffle 63 is separated from the first butting portion 6241 of the second cantilever 624 of the pawl 62, and the air inlet baffle 63 removes the limitation on the pawl 62, so that the pawl 62 can be driven by the fourth elastic member 67 to rotate from the ninth position to the tenth position.

[0218] Specifically, an end surface of the first butting portion 6241 of the pawl 62 that butts against the swing member 633 of the air inlet baffle 63 is a butting arc surface 6242, and an end surface of the swing member 633 that butts against the first butting portion 6241 is a locking arc surface 639. As shown in FIG. 26A and FIG. 26B, before the trigger mechanism is triggered, when the air inlet baffle 63 is in the eleventh position, the butting arc surface 6242 butts against the locking arc surface 639, so that potential energy for rotation of the pawl 62 from the ninth position to the tenth position drives the door plate 632 to squeeze and press against the bracket 64 to block the trigger air inlet channel 641 of the bracket 64, and external air cannot enter the trigger air inlet channel 641 through the air inlet 642 on the top wall of the bracket 64. In this position, as shown in FIG. 35 A and FIG. 35B, the air inlet baffle 63 blocks the trigger air inlet channel 641 of the bracket 64. The air inlet baffle 63 has a tendency to rotate in a direction from the twelfth position to the eleventh position, to better block the trigger air inlet channel 641 of the bracket 64, so that when the flow rate of the inhalation airflow is greater than a preset threshold, that is, when the negative pressure of the trigger air inlet channel 641 of the bracket 64 is greater than a preset value, the air inlet baffle 63 rotates to implement an inhalation trigger function. Preferably, the butting arc surface 6242 and the locking arc surface 639 are both eccentrically circular arc surfaces, so that an effect of butting between the butting arc surface 6242 and the locking arc surface 639 is better, which is more beneficial to driving the door plate 632 to squeeze and press against the bracket 64 to block the trigger air inlet channel 641 of the bracket 64.

[0219] In another implementation, the butting arc surface 6242 and the locking arc surface 639 may alternatively be set to curved surfaces in any other shape, that is, not necessarily arc surfaces, provided that the butting arc surface 6242 and the locking arc surface 639 can implement butting cooperation when the air inlet baffle 63 is in the eleventh position, to drive the door plate 632 to squeeze and press against the bracket 64 to block the trigger air inlet channel 641 of the bracket 64.

[0220] As shown in FIG. 33 A to FIG. 33B, a side surface of the swing member 633 of the air inlet baffle 63 has a first bevel 6331. As shown in FIG. 27A and FIG. 27B, in a process in which the pawl 62 rotates from the ninth position to the tenth position, the first butting portion 6241 butts against the first bevel 6331 of the swing member 633 of the air inlet baffle 63, to drive the air inlet baffle 63 to rotate from the twelfth position to the thirteenth position, thereby ensuring that the air inlet baffles 63 can be quickly opened. The twelfth position is a middle position of the movement of the air inlet baffle 63. As shown in FIG. 36, when the air inlet baffle 63 is in the twelfth position, the trigger air inlet channel 641 of the bracket 64 is partially opened, but is not opened to a maximum angle.

[0221] As shown in FIG. 28, the trigger process ends. When the pawl 62 is in the tenth position, the first butting portion 6241 of the second cantilever 624 of the pawl 62 limits the air inlet baffle 63 to the thirteenth position. That is, when the pawl 62 rotates to the tenth position, the air inlet baffle 63 rotates to the thirteenth position, and the first butting portion 6241 limits the air inlet baffle 63. As shown in FIG. 37, when the air inlet baffle 63 rotates to the thirteenth position, the air inlet baffle 63 is completely opened or opened to a maximum angle. As shown in FIG. 28, in this case, the first butting portion 6241 limits the air inlet baffle 63, and the air inlet baffle 63 does not need to be maintained in an open state through breathing power of the user.

[0222] As shown in FIG. 32A to FIG. 33B, the pawl 62 further includes a third cantilever 627. The third cantilever 627 has one end connected to the plate body 622 and the other end provided with a second butting portion 628. A side surface of the swing member 633 of the air inlet baffle 63 has a second bevel 6332, and the second bevel 6332 faces away from the first bevel 6331. As shown in FIG. 29A and FIG. 29B, in a cover closing process, during reverse resetting of the pawl 62 from the tenth position to the ninth position, the first butting portion 6241 of the second cantilever 624 removes the limitation on the air inlet baffle 63, and the second butting portion 628 applies a trigger force for reverse resetting to the air inlet baffle 63 by butting against the second bevel 6332 of the swing member 633, so that the air inlet baffle 63 is reset reversely under the joint action of the third elastic member 66 and the second butting portion 628, to avoid a problem that the air inlet baffle 63 is stuck, has no effect, and cannot be reset.

[0223] As shown in FIG. 30A to FIG. 32B, the pawl 62 further includes a pressing block 629.The pressing block 629 and the first rotating shaft 621 are both positioned on a same surfaceof the plate body 622. In a process in which the pawl 62 rotates from the ninth position to the tenth position, the pressing block 629 is configured to squeeze the second elastic arm snap 538, so that the dose protection plate 61 has the limitation removed.

[0224] As shown in FIG. 32A to FIG. 32B, the pawl 62 further includes a first limiting block 620, the first limiting block 620 is positioned on the plate body 622, and is positioned on a same surface of the plate body 622 as the first rotating shaft 621. A fourth elastic member 67 is sleeved over the first rotating shaft 621. The fourth elastic member 67 includes a driving arm and a fixed arm. The first limiting block 620 is configured to butt against the fourth elastic member 67. Specifically, the first limiting block 620 is configured to butt against the driving arm of the fourth elastic member 67. Specifically, there may be one or more first limiting blocks 620. When there are a plurality of first limiting blocks 620, the plurality of first limiting blocks 620 may be distributed at intervals along a circular arc, so that the driving arm of the fourth elastic member 67 may butt against different first limiting blocks 620, and the fourth elastic member 67 may be bent to different degrees.

[0225] In an implementation, the first limiting block 620 may be a pressing block 629. That is, the pressing block 629 is used as the first limiting block 620. The pressing block 629 may be configured to squeeze the second elastic arm snap 538, and may also be configured to butt against the fourth elastic member 67, to cause the driving arm of the fourth elastic member 67 to directly butt against the pressing block 629. This is beneficial to simplifying the structure, reducing costs, and saving space.

[0226] Referring to FIG. 30A to FIG. 32B, the pawl 62 further includes a second limiting block 625 positioned on the plate body 622, and the second limiting block 625 is spaced apart from the pressing block 629. Specifically, in a direction in which the pawl 62 rotates from the ninth position to the tenth position, the second limiting block 625 is located on a side of the pressing block 629. As shown in FIG. 30A and FIG. 30B, when the pawl 62 is in the ninth position, the second limiting block 625 butts against the second elastic arm snap 538, and the pressing block 629 does not squeeze the second elastic arm snap 538 to deform. That is, when the pawl 62 is in the ninth position, the second elastic arm snap 538 is located between the pressing block 629 and the second limiting block 625, and butts against the second limiting block 625. The second limiting block 625 limits the second elastic arm snap 538 in an initial state, so that the dose protection plate 61 is locked by the second elastic arm snap 538 and cannot move. The dose protection plate 61 covers the measuring cup 523 of the dose plate 522,to protect the powder in the measuring cup 523, so that when a user inhales with insufficient airflow or does not inhale, the powder in the measuring cup 523 can still be in a closed state, thereby avoiding a problem that the powder is wasted or is dampened and has no effect.

[0227] The dose protection plate 61 can rotate to and fro between a seventh position and an eighth position. As shown in FIG. 38 to FIG. 39B, the dose protection plate 61 includes a first extension portion 611 and a second extension portion 612 that are connected to each other. The first extension portion 611 has a projection located on the slider 521, and is configured to block the measuring cup 523. The second extension portion 612 has a projection located outside the slider 521. The second extension portion 612 is further configured to connect to the second elastic member 65, making it convenient for the second elastic member 65 to drive the dose protection plate 61 to move from the seventh position to the eighth position. An extension direction of the squeezing elastic arm 535 of the slider 521 is parallel to an extension direction of the first extension portion 611. The squeezing elastic arm 535 has one end connected to a side wall of the first limiting wall 528 and the other end butting against the second extension portion 612, so that when the dose protection plate 61 is in the seventh position, the squeezing elastic arm 535 squeezes the dose protection plate 61, and a side surface of the first extension portion 611 can be attached to a side surface of the third receiving groove 419 close to the powder exit 413, thereby avoiding leakage of the powder.

[0228] When being in the seventh position, the dose protection plate 61 is positioned corresponding to the position of the powder inlet 518 of the mounting base 51. After the delivery stroke of the delivery mechanism ends, before the trigger mechanism is triggered, the dose assembly 52 is in the sixth position. When the dose protection plate 61 is in the seventh position, the dose protection plate 61 covers the measuring cup 523 of the dose assembly 52, so that the measuring cup 523 of the dose plate 522 is blocked by the dose protection plate 61, and cannot be exposed in the airflow channel QI. Even when a user inhales, the powder in the measuring cup 523 does not flow out of the measuring cup 523, effectively avoiding waste of the powder in the measuring cup 523 before the trigger mechanism is triggered. After the trigger mechanism is triggered, the dose protection plate 61 is driven to move from the seventh position to the eighth position. When the dose protection plate 61 is in the eighth position, the dose protection plate 61 is misaligned with the powder inlet 518 on the mounting base and the airflow channel QI, the dose protection plate 61 does not cover the dose plate 522, and the measuring cup 523 of the dose plate 522 of the dose assembly 52 is exposed on the airflowchannel QI. Therefore, when a user inhales, the drug powder in the measuring cup 523 flows through the airflow channel QI and the powder inlet 518 together with the airflow and then enters the deagglomeration mechanism.

[0229] The second elastic member 65 provides power for the dose protection plate 61 to move from the seventh position to the eighth position. Specifically, when the dose protection plate 61 is limited to the seventh position, the second elastic member 65 is squeezed to deform and accumulate potential energy. Specifically, the second elastic member 65 may be a second torsion spring, and the second torsion spring has one end fixed to the mounting base 51 and the other end fixed to the dose protection plate 61, to make it convenient to drive the dose protection plate 61 to move from the seventh position to the eighth position. Specifically, the second elastic member 65 drives the dose protection plate 61 to move from the seventh position to the eighth position in the first direction Al. In another implementation, the dose protection plate 61 may alternatively move from the seventh position to the eighth position in another direction. For example, a rectilinear motion or a rotational motion may be used, or another guide structure is positioned, so that the dose protection plate 61 can perform a curved motion along the guide structure, to implement a to-and-fro motion of the dose protection plate 61 between the seventh position and the eighth position.

[0230] Before the trigger mechanism is triggered, the second elastic arm snap 538 on the mounting base 51 limits the dose protection plate 61 to the seventh position, and the measuring cup 523 of the dose plate 522 is covered. When a flow rate of an inhalation airflow of a user is greater than a preset threshold, and negative pressure of the trigger air inlet channel 641 is greater than a preset value, the air inlet baffle 63 rotates from the eleventh position to the twelfth position, the trigger air inlet channel 641 is opened, and the limitation on the pawl 62 is removed. The pawl 62 is driven by the fourth elastic member 67 positioned on the pawl 62 to rotate from the ninth position to the tenth position. The pawl 62 has a tendency to move downward in a process of rotating from the ninth position to the tenth position. In a process in which the pawl 62 rotates, the pressing block 629 on the plate body 622 of the pawl 62 starts to come into contact with the second elastic arm snap 538 and continuously squeezes the second elastic arm snap 538 to deform. Specifically, the second elastic arm snap 538 elastically deforms downward. After deforming, the second elastic arm snap 538 removes the limitation on the dose protection plate 61, so that the dose protection plate 61 is driven by the second elastic member 65 to move from the seventh position to the eighth position, the dose protectionplate 61 no longer covers the measuring cup 523 of the dose plate 522, and the powder in the measuring cup 523 is exposed in the airflow channel QI. Preferably, when the dose protection plate 61 moves to the eighth position, a side edge of the dose protection plate 61 butts against the first limiting wall 528 of the slider 521, so that in a process of resetting the dose assembly 52, movement of the slider 521 pushes the dose protection plate 61 to be reset from the eighth position to the seventh position.

[0231] Specifically, in a cover closing process, during the reset movement of the connecting rod 42 from the fourth position to the third position, the protruding structure 422 of the connecting rod 42 and the resetting convex post 533 act to drive the dose assembly 52 to be reset from the sixth position to the fifth position. In this process, the first limiting wall 528 of the slider 521 of the dose assembly 52 and the dose protection plate 61 are maintained in a state of butting against each other. Specifically, the squeezing elastic arm 535 positioned on the first limiting wall 528 of the slider 521 butts against the dose protection plate 61. The squeezing elastic arm 535 of the slider 521 of the dose assembly 52 pushes the dose protection plate 61 to move from the eighth position to the seventh position, thereby resetting the dose protection plate 61.

[0232] Further, in an implementation, as shown in FIG. 32A to FIG. 32B, the pawl 62 further includes a third limiting block 6221. The third limiting block 6221 is positioned on the plate body 622. The third limiting block 6221 is configured to temporarily limit the fourth elastic member 67 when the fourth elastic member 67 is assembled, thereby making mounting more convenient, ensuring that the fourth elastic member 67 is mounted in place, and improving assembly stability and assembly efficiency.

[0233] Referring to FIG. 10, FIG. 32A to FIG. 40C, the connecting rod 42 further includes a counting dial block 424. The counting dial block 424 is specifically positioned on a side wall of the connecting rod 42. The counting dial block 424 may be fixedly connected to the connecting rod 42 by gluing, snap connection, or the like, or may be integrally formed with the connecting rod 42. The pawl 62 includes a fourth cantilever 6222. The fourth cantilever 6222 is spaced apart from each of the first cantilever 623, the second cantilever 624, and the third cantilever 627. The fourth cantilever 6222 has one end connected to the plate body 622 and the other end being a free end.

[0234] As shown in FIG. 40A, before the air pressing stroke starts, when the connecting rod 42 is in the third position, that is, the initial position, the counting dial block 424 of the connecting rod 42 butts against the free end of the fourth cantilever 6222 of the pawl 62, and the counting dial block 424 limits the pawl 62 to the ninth position. In this case, an action force of the pawl 62 is all on the connecting rod 42, and the pawl 62 is spaced apart from the air inlet baffle 63. Specifically, the butting arc surface 6242 of the pawl 62 and the locking arc surface 639 of the swing member 633 of the air inlet baffle 63 are spaced apart from each other. In a process in which the air pressing mechanism performs an air pressing stroke, that is, in a process in which the connecting rod 42 moves from the third position to the fourth position, the connecting rod 42 moves vertically downwards, so that the counting dial block 424 also moves downwards. As shown in FIG. 40B, the limitation on the pawl 62 from the counting dial block 424 is removed. Only after the pawl 62 rotates by a small angle, the butting arc surface 6242 of the pawl 62 butts against the locking arc surface 639 of the swing member 633 of the air inlet baffle 63.

[0235] It may be understood that, when the connecting rod 42 is in the third position, the spacing the butting arc surface 6242 of the pawl 62 apart from the locking arc surface 639 of the swing member 633 of the air inlet baffle 63 can avoid a case that the butting arc surface 6242 butts against the locking arc surface 639 initially, and after the limitation on the pawl 62 from the counting dial block 424 is removed and the pawl 62 rotates by a small angle, the butting arc surface 6242 further butts against the locking arc surface 639, and a butting force increases, and consequently the air inlet baffle 63 is stuck and cannot rotate when a flow rate of an inhalation airflow of a user is greater than a preset threshold, that is, avoid the problem that the inhalation trigger function cannot be implemented.

[0236] Specifically, referring to FIG. 3 to FIG. 6, FIG. 10, and FIG. 32A to FIG. 40C, the counting dial block 424 of the connecting rod 42 is a step structure, including a first step surface 425 and a second step surface 426, and the second step surface 426 is located on a side of the first step surface 425 close to the first rotating shaft 621. The free end of the fourth cantilever 6222 of the pawl 62 is a step structure, including a third step surface 601 and a fourth step surface 602, and the fourth step surface 602 is located on a side of the third step surface 601 close to the first rotating shaft 621. As shown in FIG. 40 A, before the air pressing stroke, when the connecting rod 42 is in the third position, the first step surface 425 of the counting dial block 424 is spaced apart from the third step surface 601 of the fourth cantilever 6222, and thesecond step surface 426 of the counting dial block 424 is in contact with the fourth step surface 602 of the fourth cantilever 6222. As shown in FIG. 40B, during the air pressing stroke, in a process in which the connecting rod 42 moves from the third position to the fourth position, the second step surface 426 of the counting dial block 424 is separated from the fourth step surface 602 of the fourth cantilever 6222, to remove the limitation on the pawl 62. As shown in FIG. 40C, after the trigger stroke, that is, after the pawl 62 rotates from the ninth position to the tenth position, the first step surface 425 of the counting dial block 424 is in contact with the third step surface 601 of the fourth cantilever 6222, and the second step surface 426 of the counting dial block 424 is spaced apart from the fourth step surface 602 of the fourth cantilever 6222. As shown in FIG. 40D, in a process of resetting the air pressing mechanism, that is, in a process of reset movement of the connecting rod 42 from the fourth position to the third position, the first step surface 425 of the counting dial block 424 is separated from the third step surface 601 of the fourth cantilever 6222, and the second step surface 426 of the counting dial block 424 is in contact with the fourth step surface 602 of the fourth cantilever 6222, so that movement of the counting dial block 424 of the connecting rod 42 drives the pawl 62 to be reversed from the tenth position to the ninth position, thereby resetting the pawl 62.

[0237] Referring to FIG. 2 and FIG. 41, the housing 1 of the powder inhalation device 100 includes an upper housing 11 and a lower housing 12, the upper housing 11 and the lower housing 12 are assembled and connected to form a receiving space, and each functional mechanism is positioned in the receiving space. The lower housing 12 has a suction nozzle 13, and an external air inlet 14 is provided on a side wall of the lower housing 12 corresponding to a position of the air inlet 642 on the top wall of the trigger air inlet channel 641. As shown in FIG. 41, the external air inlet 14 is located above the suction nozzle 13. When the outer cover 2 is in the first position, the outer cover 2 blocks the suction nozzle 13 and the external air inlet 14. When the outer cover 2 rotates to the second position, the suction nozzle 13 and the external air inlet 14 are exposed, the external air inlet 14 allows the external atmosphere to communicate with the space inside the housing 1, and the external atmosphere enters the housing 1 through the external air inlet 14. Further, the side wall of the lower housing 12 is further provided with a grille 15, and the grille 15 protrudes from an outer wall surface of the lower housing 12. The grille 15 is in a position above the suction nozzle 13 and is adjacent to the external air inlet 14. The protruding, by the grille 15, from the outer wall surface of the lower housing 12 can avoid a problem that lips are in contact with the external air inlet 14 and block the external air inlet 14 when a user inhales drug powder from the position of the suction nozzle 13, andconsequently air intake is not smooth or the external atmosphere cannot enter the housing 1 from the external air inlet. One or more external air inlets 14 and one or more grilles 15 may be positioned. In another implementation, the external air inlet 14 and the grille 15 may be positioned in other positions.

[0238] After the delivery stroke ends, when the outer cover 2 rotates to the second position, the outer cover 2 no longer blocks the suction nozzle 13 of the powder inhalation device 100, the suction nozzle 13 is exposed, and the user may inhale in the position of the suction nozzle 13. When the flow rate of the inhalation airflow is greater than the preset threshold, that is, when the negative pressure of the trigger air inlet channel 641 of the bracket 64 is greater than the preset value, the trigger mechanism is triggered, the trigger stroke is performed, and the air inlet baffle 63 rotates from the eleventh position to the twelfth position, so that the trigger air inlet channel 641 is opened. In this process, the swing member 633 of the air inlet baffle 63 is separated from the first butting portion 6241 of the second cantilever 624 of the pawl 62, the limitation on the pawl 62 is removed, and the pawl 62 is driven by the fourth elastic member 67 to rotate from the ninth position to the tenth position. In a process in which the pawl 62 rotates, the pressing block 629 of the pawl 62 squeezes the second elastic arm snap 538 on the mounting base 51 to deform, to remove the limitation on the dose protection plate 61 from the second elastic arm snap 538, so that the dose protection plate 61 is driven by the second elastic member 65 to move from the seventh position to the eighth position, and the powder in the measuring cup 523 is exposed. After the trigger air inlet channel 641 is opened, and the external atmosphere flows through the air inlet 642 of the trigger air inlet channel 641, the external atmosphere enters the airflow channel QI from the air inlet port 417 of the airway groove 416 at the bottom of the powder container 41, carries the powder that is in the measuring cup 523 and that is exposed in the airflow channel QI, flows to the powder inlet 518, finally enters the deagglomeration mechanism, flows to the position of the suction nozzle 13 after being deagglomerated by the deagglomeration mechanism, and is inhaled by the user.(4) Deagglomeration mechanism

[0239] Referring to FIG. 42A to FIG. 47, FIG. 42A is a schematic structural diagram of a deagglomeration mechanism of a powder inhalation device according to this disclosure in an embodiment, FIG. 42B is a schematic cross-sectional view of the deagglomeration mechanism provided in FIG. 42A, FIG. 43 is a schematic structural diagram of a swirling member of the deagglomeration mechanism provided in FIG. 42A, FIG. 44A is a schematic structural diagramof a flow guide member of the deagglomeration mechanism provided in FIG. 42A, FIG. 44B is a schematic cross-sectional view of the flow guide member provided in FIG. 44A, FIG. 45 is a schematic structural diagram of a deagglomeration mechanism of a powder inhalation device according to this disclosure in another embodiment, FIG. 46 is a schematic structural diagram of a swirling member of the deagglomeration mechanism provided in FIG. 45, and FIG. 47 is a schematic structural diagram of a flow guide member of the deagglomeration mechanism provided in FIG. 45.

[0240] Referring to FIG. 42A to FIG. 47, the deagglomeration mechanism includes a swirling member 71 and a flow guide member 72 that are connected to each other. Specifically, the swirling member 71 and the flow guide member 72 may be connected in a manner such as snap connection, ultrasonic welding, or gluing. As shown in FIG. 43 and FIG. 46, the swirling member 71 is integrally formed with the mounting base 51. In another implementation, the swirling member 71 may alternatively be fixedly connected to the mounting base 51. The swirling member 71 and the flow guide member 72 cooperate to form a swirling cavity 73. A top wall of the swirling cavity 73 has a powder inlet 518, a bottom wall of the swirling cavity 73 has a powder outlet 74. The flow guide member 72 has a powder outlet channel 721 that communicates with the powder outlet 74. The powder outlet channel 721 has one end communicating with the swirling cavity 73 through the powder outlet 74, and the other end communicating with the suction nozzle 13. One end of the airflow channel QI away from the air inlet port 417 of the airway groove 416 communicates with the swirling cavity 73 through the powder inlet 518. In the trigger stroke, the air and the powder that flow through the airflow channel QI enter the swirling cavity 73 through the powder inlet 518. After being deagglomerated in the swirling cavity 73, the powder flows to the powder outlet channel 721 through the powder outlet 74 of the flow guide member 72, and finally flows to the suction nozzle 13 to be inhaled by the user. Referring to FIG. 42 A to FIG. 44B, in an embodiment, a surface of the swirling member 71 close to the flow guide member 72 has a swirling groove 711, the flow guide member 72 covers the swirling groove 711, to form a swirling cavity 73, and a bottom wall of the swirling groove 711 is uses as a top wall of the swirling cavity 73. A first fin 712 and a second fin 713 are connected to the bottom wall of the swirling groove 711. The first fin 712 and a side wall of the swirling groove 711 are spaced apart from each other to form a first tangential air inlet groove 714. The second fin 713 and the side wall of the swirling groove 711 are spaced apart from each other to form a second tangential air inlet groove 715. A mixing groove 716 is formed between the first fin 712 and the second fin 713.

[0241] Specifically, the flow guide member 72 includes a plate-shaped portion 722. The plate-shaped portion 722 covers one end of the swirling groove 711 and cooperates with the swirling groove 711 to form the swirling cavity 73. The plate-shaped portion 722 is uses as a bottom wall of the swirling cavity 73. As shown in FIG. 42 A to FIG. 44B, in an implementation, each of the first fin 712 and the second fin 713 is in an arc shape. Each of the first fin 712 and the second fin 713 has one end connected to the side wall of the swirling groove 711 and the other end spaced apart from the side wall of the swirling groove 711, so that the first tangential air inlet groove 714 and the second tangential air inlet groove 715 can both communicate with the mixing groove 716. A diameter of an inscribed circle of the mixing groove 716 formed by the arc-shaped first fin 712 and the arc-shaped second fin 713 is less than or equal to 12 mm. Preferably, the diameter of the inscribed circle of the mixing groove 716 ranges from 8 mm to 10 mm. For example, the diameter of the inscribed circle of the mixing groove 716 is any value such as 8 mm, 8.5 mm, 9 mm, 9.5 mm, or 10 mm. The height of the swirling cavity 73 is not less than 6 mm. For example, the height of the swirling cavity 73 is any value such as 7 mm, 7.6 mm, 8 mm, 8.2 mm, 8.7 mm, 8.9 mm, 9 mm, or 9.5 mm. Therefore, the airflow is enabled to play a role in swirling and acceleration, so as to fully deagglomerate the powder in a process of transferring the powder from the powder inlet 518 to the powder outlet port 74.

[0242] As shown in FIG. 44 A, a first tangential air inlet 717 and a second tangential air inlet 718 are respectively positioned on the plate-shaped portion 722 of the flow guide member 72 corresponding to the first tangential air inlet groove 714 and the second tangential air inlet groove 715. The first tangential air inlet 717 and the second tangential air inlet 718 are notches positioned on the plate-shaped portion 722. During a user's inhalation, after entering the housing 1 through the external air inlet 14, external airflow may enter the first tangential air inlet groove 714 and the second tangential air inlet groove 715 respectively through the first tangential air inlet 717 and the second tangential air inlet 718, and then enter the mixing groove 716 after passing through the first tangential air inlet groove 714 and the second tangential air inlet groove 715. Tangential airflows entering the first tangential air inlet groove 714 and the second tangential air inlet groove 715 can deagglomerate the powder more efficiently, thereby improving a deagglomeration effect, and avoiding waste.

[0243] Preferably, the powder inlet 518 is located on a bottom wall of the first tangential air inlet groove 714. It may be understood that, compared with a case that the powder inlet 518 ispositioned at a bottom wall of the mixing groove 716, a case that the powder inlet 518 is located at the bottom wall of the first tangential air inlet groove 714 can prolong a flow path of the powder in the swirling cavity 73, and a path through which the powder flows from the powder inlet 518 to the mixing groove 716 is longer, which is more beneficial to disaggregation of the powder and improves a deagglomeration effect.

[0244] As shown in FIG. 42B and FIG. 43, in an implementation, the powder inlet 518 is located at a first end of the first tangential air inlet groove 714, and the first end of the first tangential air inlet groove 714 communicates with the mixing groove 716. It may be understood that, the powder inlet 518 is positioned on the bottom wall at the first end of the first tangential air inlet groove 714 close to the mixing groove 716, the first end of the first tangential air inlet groove 714 is narrow, and the flow rate of the airflow is higher, which is more beneficial to disaggregation of the powder, and improves the disaggregation effect.

[0245] As shown in FIG. 42B, FIG. 44A, and FIG. 44B, a surface of the plate-shaped portion 722 of the flow guide member 72 close to the swirling member 71 has two inclined flow guide convex ribs 723. The two inclined flow guide convex ribs 723 are respectively embedded in the first tangential air inlet groove 714 and the second tangential air inlet groove 715, and respectively cooperate with the first tangential air inlet groove 714 and the second tangential air inlet groove 715 to form the first tangential air inlet channel 75 and the second tangential air inlet channel 76. A surface of the inclined flow guide convex rib 723 facing the swirling groove 711 is a flow guide bevel, and heights of the inclined flow guide convex ribs 723 gradually increase in air inlet directions of the first tangential air inlet groove 714 and the second tangential air inlet groove 715. In an implementation, projections of the inclined flow guide convex ribs 723 on the swirling member 71 cover the powder inlet 518.

[0246] It may be understood that, the two inclined flow guide convex ribs 723 are respectively embedded in the first tangential air inlet groove 714 and the second tangential air inlet groove 715, and the heights of the inclined flow guide convex ribs 723 in the air inlet direction gradually increase, so that the airflows entering the first tangential air inlet groove 714 and the second tangential air inlet groove 715 may be compressed, and the airflow in the first tangential air inlet groove 714 and the second tangential air inlet groove 715 closer to the position of the mixing groove 716 has a higher flow rate. The swirling flow is convergent to the powder outlet 74, thereby enhancing a deagglomeration effect of the airflow on the powder,more facilitating deagglomeration of the powder, and avoiding a waste of the powder caused by insufficient deagglomeration of the powder.

[0247] Referring to FIG. 44A and FIG. 44B, the flow guide member 72 further has a connecting rib 725 matching the mixing groove 716. The connecting rib 725 is positioned on a surface of the plate-shaped portion 722 of the flow guide member 72 close to the swirling member 71. The connecting rib 725 is embedded in the mixing groove 716 and cooperates with the mixing groove 716 to form a mixing cavity 77. A top surface of the connecting rib 725 is connected to flow guide bevels of the inclined flow guide convex ribs 723. The powder outlet 74 runs through the connecting rib 725 and the plate-shaped portion 722. The powder outlet 74 has one end communicating with the mixing groove 716 and the other end communicating with the powder outlet channel 721. Powder and airflow that enter the mixing groove 716 through the first tangential air inlet groove 714 and the second tangential air inlet groove 715 flow downwards through the mixing groove 716, then enter the powder outlet channel 721 through the powder outlet 74, and finally flow to the position of the suction nozzle 13 to be inhaled by the user.

[0248] Referring to FIG. 45 to FIG. 47, in another embodiment, a surface of the flow guide member 72 close to the swirling member 71 has a swirling groove 711. The swirling groove 711 includes a mixing groove 716 and a first tangential air inlet groove 714 and a second tangential air inlet groove 715 that respectively communicate with two opposite side walls of the mixing groove 716. The powder outlet 74 is located on a bottom wall of the mixing groove716 and communicates with the powder outlet channel 721.

[0249] Ports at ends of the first tangential air inlet groove 714 and the second tangential air inlet groove 715 away from the mixing groove 716 are respectively a first tangential air inlet717 and a second tangential air inlet 718.

[0250] Preferably, a distance between the powder outlet 74 and a side surface of the mixing groove 716 is not greater than 2 mm, so that residual of the powder in a position between the powder outlet 74 and the side surface of the mixing groove 716 can be eliminated, to avoid a problem that an excessively large distance between the powder outlet 74 and the side surface of the mixing groove 716, and consequently during inhalation of a user, the powder is deposited in the position between the powder outlet 74 and the side surface of the mixing groove 716, to cause a waste of the powder and further cause an inaccurate administration dose. Specifically,an angle between a bottom surface and a side surface of the swirling groove 711 ranges from 85 to 95 degrees. Preferably, the angle between the bottom surface and the side surface of the swirling groove 711 is 90 degrees, to facilitate pattern draft during preparation of the flow guide member 72.

[0251] In this embodiment, the swirling member 71 covers the swirling groove 711 of the flow guide member 72 to form the swirling cavity 73, and cooperates with the first tangential air inlet groove 714 and the second tangential air inlet groove 715 to respectively form the first tangential air inlet channel 75 and the second tangential air inlet channel 76. As shown in FIG. 46, a surface of the swirling member 71 close to the flow guide member 72 has a cylindrical protrusion 719 and a plurality of inclined flow guide ribs 710. Heights of the inclined flow guide ribs 710 gradually increase in air inlet directions of the first tangential air inlet groove 714 and the second tangential air inlet groove 715. The height of the cylindrical protrusion 719 is greater than a maximum height of the inclined flow guide ribs 710. It may be understood that the arranging the plurality of inclined flow guide ribs 710 can guide a flow direction of the airflow, so that the airflow forms a swirling flow in the swirling cavity 73. In the air inlet direction, the airflow may also be compressed by gradually increasing the height of the inclined flow guide rib 710, which better helps to accelerate deagglomeration of the powder. The cylindrical protrusion 719 protrudes from the inclined flow guide rib 710, which also helps to prolong a rotation path of the airflow, and better deagglomerates the powder.

[0252] Specifically, as shown in FIG. 46, in a specific implementation, there are two inclined flow guide ribs 710, the two inclined flow guide ribs 710 are positioned centrally symmetrically, and a radian of an outer side surface of each inclined flow guide rib 710 is greater than 90 degrees. Preferably, the radian of the outer side surface of the inclined flow guide rib 710 is greater than or equal to 120 degrees and less than or equal to 150 degrees. More preferably, the radian of the outer side surface of the inclined flow guide rib 710 is specifically 135 degrees. The inclined flow guide rib 710 is embedded in the mixing groove 716 of the flow guide member 72. The outer side surface of the inclined flow guide rib 710 is a circular arc surface and is attached to a side surface of the mixing groove 716. An inner side surface of the inclined flow guide rib 710 is a circular arc surface and is attached to a side surface of the cylindrical protrusion 719. The attaching the outer side surface of the inclined flow guide rib 710 to the side surface of the mixing groove 716 can avoid a case that the powder in the swirling groove 711 leaks from the gap between the outer side surface of the inclinedflow guide rib 710 and the side surface of the mixing groove 716, thereby avoiding a waste of the powder. In another implementation, there may alternatively be any quantity of, such as three, four, or five, inclined flow guide ribs 710. The radian of the outer side surface of the inclined flow guide rib 710 may be set to any value, as long as the flow direction of the airflow can be guided, and the airflow forms a swirling flow in the swirling cavity 73, so as to accelerate deagglomeration of the powder.

[0253] As shown in FIG. 46, the powder inlet 518 runs through one of the inclined flow guide ribs 710. Specifically, the powder inlet 518 is in a slope start position of the flow guide bevel of the inclined flow guide rib 710, and the slope start position is a position at which a height of the inclined flow guide rib 710 is the smallest, which is more beneficial to prolonging a flow path of the powder and improving a disaggregation effect.

[0254] In an implementation, a surface of the swirling member 71 close to the flow guide member 72 has a pillar-shaped protrusion and a plurality of inclined flow guide ribs 710. The pillar-shaped protrusion may be a cylindrical protrusion 719, and the plurality of inclined flow guide ribs 710 are positioned around the pillar-shaped protrusion. As shown in FIG. 46, a side surface of the pillar-shaped protrusion has a baffle 78, the baffle 78 is spaced apart from the powder inlet 518, and a projection of the baffle 78 on the swirling member 71 covers the powder inlet 518. It may be understood that, by disposing the baffle 78, and covering the powder inlet 518 by the projection of the baffle 78, the baffle 78 can block the powder and the airflow that enter the swirling groove 711 through the powder inlet 518, so that the residence time of the powder in the swirling cavity 73 can be properly prolonged, facilitating more full deagglomeration of the powder. In another implementation, the baffle 78 may alternatively be positioned on a side surface of the powder outlet 74. A projection of the baffle 78 on the swirling member 71 covers the powder inlet 518, to block the powder and the airflow that enter the swirling groove 711 through the powder inlet 518.

[0255] In this disclosure, the swirling cavity 73 includes a mixing cavity 77 and a first tangential air inlet channel 75 and a second tangential air inlet channel 76 that respectively communicate with two opposite side walls of the mixing cavity 77. By arranging an air inlet port 417 of an airway groove 416 at the bottom of the powder container 41, that is, an air inlet port 417 of the airflow channel QI, and a first tangential air inlet 717 and a second tangential air inlet 718 of the flow guide member 72, the areas of the air inlet port 417 of the airflow channel Q 1 , the first tangential air inlet 717, and the second tangential air inlet 718 are adjusted,IQso that an airflow amount of the airflow channel QI occupies 8% to 25% of a total airflow amount of the airflow channel QI, the first tangential air inlet channel 75, and the second tangential air inlet channel 76, thereby achieving a good emptying effect, and generating resistance to inhalation of an appropriate size.

[0256] In the trigger stroke, the powder and the airflow flow through the first tangential air inlet channel 75 and the second tangential air inlet channel 76 and enter the mixing cavity 77. The powder and the airflow are fully deagglomerated and flow through the mixing cavity 77, and then are sequentially discharged through the powder outlet 74 and the powder outlet channel 721 to the position of the suction nozzle 13, to be inhaled by the user.

[0257] Referring to FIG. 48 to FIG. 49, FIG. 48 is a diagram of aerodynamic particle size distribution of first powder in a powder inhalation device, and FIG. 49 is a diagram of aerodynamic particle size distribution of second powder in a powder inhalation device.

[0258] Referring to FIG. 48 to FIG. 49, to verify the deagglomeration effect of the deagglomeration mechanism of the powder inhalation device 100 of this disclosure, the inventor of this disclosure performs a same experiment by using the powder inhalation device 100 provided in this disclosure with two different types of drug powder at a same inhalation airflow flow rate. Specifically, experimental data shown in FIG. 48 and FIG. 49 and experimental results shown in the following table are obtained in an experiment when the inhalation airflow flow rate is 60 L / min:

[0259] The inventor analyzes the experimental data and the experimental results, and finds that in the powder inhalation device 100 of this disclosure, under a same experimental condition, fine particle fractions of the two different types of powder both reach greater than 60%, and mass median aerodynamic diameters of the first powder and the second powder after deagglomeration are both below 2 pm. The experimental results show that the deagglomeration mechanism of the powder inhalation device 100 of this disclosure has a good deagglomeration effect, and has a strong powder deagglomeration capability.(5) Counting mechanism

[0260] Referring to FIG. 50A to FIG. 53, FIG. 50A is a schematic structural diagram of a counting mechanism of the powder inhalation device provided in FIG. 1, FIG. 50B is a schematic diagram of an exploded structure of the counting mechanism provided in FIG. 50A, FIG. 51 is a schematic structural diagram of a ones counting wheel of the counting mechanism provided in FIG. 50A, FIG. 52 is a schematic structural diagram of a counter base of the counting mechanism provided in FIG. 50A, and FIG. 53 is a schematic structural diagram of a tens counting wheel of the counting mechanism provided in FIG. 50A.

[0261] Referring to FIG. 50Ato FIG. 53, the counting mechanism is positioned in the housing 1, and is assembled and connected to the bracket 64 of the trigger mechanism and the powder container 41 of the air pressing mechanism. Specifically, the counting mechanism is located on a side of the pawl 62 away from the mounting base 51. The counting mechanism includes a counterbase 81, a ones counting wheel 82, atens counting wheel 83, and a counter intermediate gear 84. The counting mechanism implements a counting function through cooperation between the pawl 62 and the connecting rod 42.

[0262] Specifically, both the ones counting wheel 82 and the tens counting wheel 83 are mounted on the counter base 81. A first mounting groove 811 and a second mounting groove 812 are provided on a surface of the counter base 81. The first mounting groove 811 and the second mounting groove 812 are concentrically spaced apart from each other and have a common side wall. The second mounting groove 812 is located at the periphery of the first mounting groove 811. The ones counting wheel 82 is positioned in the first mounting groove 811. The tens counting wheel 83 is positioned in the second mounting groove 812. The ones counting wheel 82 is positioned around the tens counting wheel 83.

[0263] A plurality of teeth distributed circumferentially are positioned on the ones counting wheel 82. When the powder inhalation device 100 is in a cover closed state, the outer cover 2 is in the first position, the cam 22 of the outer cover 2 limits the connecting rod 42 to the third position, the counting dial block 424 of the connecting rod 42 limits the pawl 62 to the ninth position, and the pawl 62 is engaged with one tooth of the ones counting wheel 82. Specifically, referring to FIG. 32A and FIG. 32B, a hook 6231 at one end of the first cantilever 623 of the pawl 62 away from the plate body 622 hooks one tooth of the ones counting wheel 82. In a cover opening process, when the trigger mechanism performs the trigger stroke, the pawl 62rotates from the ninth position to the tenth position, and the hook 6231 at the one end of the first cantilever 623 of the pawl 62 rotates correspondingly. When the pawl 62 rotates to the tenth position, the hook 6231 at the one end of the first cantilever 623 of the pawl 62 is engaged with a next tooth of the ones counting wheel 82. In a cover closing process, a cover closing stroke includes a counting stroke. In the counting stroke, the connecting rod 42 starts to perform reset movement from the fourth position to the third position, and drives the pawl 62 to perform reset rotation from the tenth position to the ninth position. In a process in which the pawl 62 performs reset rotation from the tenth position to the ninth position, the hook 6231 at the one end of the first cantilever 623 of the pawl 62 hooks a tooth of the ones counting wheel 82, and the pawl 62 reversely rotates and drives the ones counting wheel 82 to make a step forward and count one.

[0264] As shown in FIG. 51 and FIG. 52, the counter base 81 is further provided with a third mounting groove 813, the third mounting groove 813 is located in the second mounting groove 812, the counter intermediate gear 84 is mounted on the second mounting groove 812 of the counter base 81, and the counter intermediate gear 84 is engaged with the tens counting wheel 83 through gear features to implement transmission.

[0265] As shown in FIG. 51 to FIG. 53, a mounting hole 831 is provided on the tens counting wheel 83, a buckling post 814 is positioned on the counter base 81, and the mounting hole 831 on the tens counting wheel 83 cooperates with the buckling post 814 on the counter base 81 to implement assembly and connection. A toothed dial post 822 is further positioned on the ones counting wheel 82. A surface of each of the ones counting wheel 82 and the tens counting wheel 83 away from the counter base 81 is printed with digits. The toothed dial post 822 on the ones counting wheel 82 cooperates with the counter intermediate gear 84. When the ones counting wheel 82 rotates one round and jumps from the digit "0" to the digit "9", the toothed dial post 822 of the ones counting wheel 82 drives the counter intermediate gear 84 to rotate by two teeth. Because the tens counting wheel 83 is engaged with the counter intermediate gear 84, the tens counting wheel 83 synchronously rotates by two teeth to jump by one digit.

[0266] Referring to FIG. 2 and FIG. 41, a digit display window 122 is positioned on the lower housing 12, and the tens counting wheel 83 further has a full red warning feature. When the full red warning feature of the tens counting wheel 83 is displayed on the digit display window 122 on the lower housing 12, the tens counting wheel 83 is limited and no longer rotates.

[0267] Further, as shown in FIG. 51 and FIG. 52, a limiting elastic arm 815 is further positioned on the counter base 81, and the limiting elastic arm 815 is configured to limit the counting mechanism to unidirectional rotation. Specifically, the limiting elastic arm 815 cooperates with the teeth on the ones counting wheel 82 to implement unidirectional rotation of the ones counting wheel 82, that is, when the pawl 62 rotates, the hook 6231 of the pawl 62 scrapes the ones counting wheel 82. Because the limiting elastic arm 815 on the counter base 81 has an effect on the teeth of the ones counting wheel 82, the ones counting wheel 82 does not rotate with the pawl 62. When the pawl 62 is reset and rotates reversely, the hook 6231 on the pawl 62 hooks the ones counting wheel 82 to rotate, to implement unidirectional counting down. The foregoing arrangement can effectively avoid a problem that when the pawl 62 rotates, the hook 6231 drives the ones counting wheel 82 and consequently a counter is abnormal.

[0268] In this embodiment, the counting stroke of the counting mechanism occurs in the cover closing process, specifically, in a process in which the pawl 62 of the trigger mechanism performs reset rotation from the tenth position to the ninth position.

[0269] In the counting stroke, in the process in which the pawl 62 performs reset rotation from the tenth position to the ninth position, the limitation on the air inlet baffle 63 is removed, so that the third elastic member 66 drives the air inlet baffle 63 to perform reset rotation from the thirteenth position to the eleventh position. The cover closing stroke further includes a dose resetting stroke that is set after the counting stroke. In the dose resetting stroke, the connecting rod 42 continues to perform reset movement. The movement of the connecting rod 42 enables the protruding structure 422 of the connecting rod 42 to act on the resetting convex post 533 of the slider 521 of the dose assembly 52, to drive the dose assembly 52 to perform reset movement from the sixth position to the fifth position. In this process, the squeezing elastic arm 535 of the slider 521 of the dose assembly 52 butts against the dose protection plate 61, and movement of the dose assembly 52 drives the dose protection plate 61 to move from the eighth position to the seventh position, thereby completing resetting of the functional mechanisms.

[0270] Specifically, referring to FIG. 7A and FIG. 7B, in a cover closing process of the outer cover 2, in a counting stroke and a dose resetting stroke, the butting end 421 of the connecting rod 42 slides from one end of the second circular arc surface segment 224 away from the plane segment 221 to the position of the limiting bump 223 along the second circular arc surfacesegment 224, the first circular arc surface segment 222, and the plane segment 221 sequentially and crosses the limiting bump 223 to complete resetting. The connecting rod 42 restores from the fourth position to the third position, and the outer cover restores from the second position to the first position, to complete cover closing.

[0271] For ease of understanding, a specific running state of the powder inhalation device 100, and a cooperation relationship between and a linked process of functional mechanisms from the cover opening process to the end of the cover closing process, that is, in an entire process in which the outer cover 2 rotates from the first position to the second position, the user inhales, and then the outer cover 2 rotates from the second position to the first position are described below.(5A) Cover opening stroke

[0272] A stroke by which the outer cover 2 rotates from the first position to the second position is defined as a cover opening stroke. An angle of the outer cover 2 in the first position is defined as 0 degrees, and an angle of the outer cover 2 in the second position is in a range of 120 degrees to 180 degrees. In a specific implementation, an angle of the outer cover 2 in the second position is 135 degrees. In an implementation, the torque in the cover opening stroke ranges from 0.07 to 0.28 N m. The cover opening stroke includes an air pressing stroke and a delivery stroke that are sequentially positioned, and an unlocking stroke that is performed synchronously with the air pressing stroke and the delivery stroke.

[0273] In the air pressing stroke, the outer cover 2 rotates from the first position to the second position, and the cam 22 gradually moves aside, so that the compression spring 45 drives the connecting rod 42 to start to move from the third position to the fourth position, and the compression spring 45 compresses the air capsule 44 to press air into the powder container 41, to fill the measuring cup 523 of the dose assembly 52 with the powder in the powder container 41. In a specific implementation, when the air pressing stroke ends, the outer cover 2 rotates to 50 degrees.

[0274] In the delivery stroke, the connecting rod 42 continues to move and removes the limitation on the first elastic arm snap 524 of the slider 521 of the dose assembly 52 from the snap-fit portion 513 of the mounting base 51, so that the first elastic member 536 drives the dose assembly 52 to move from the fifth position to the sixth position, and the measuring cup 523 of the dose plate 522 of the dose assembly 52 moves from the powder filling position tothe powder delivery position, that is, is located on the airflow channel QI. In this process, the port 5191 of the pressure relief opening 519 is exposed, the connecting rod 42 continues to move toward the fourth position, the compression spring 45 continues to compress the air capsule 44, and airflow generated by compressing the air capsule 44 is sequentially discharged through the pressure relief hole 414 and the pressure relief opening 519, to implement pressure relief.

[0275] In the unlocking stroke, the connecting rod 42 moves downward to remove the limitation on the pawl 62 of the trigger mechanism. The pawl 62 butts against the air inlet baffle 63 of the trigger mechanism and is limited to the ninth position by the air inlet baffle 63. Specifically, the unlocking stroke is synchronously performed when the air pressing stroke starts. The unlocking stroke is started when the connecting rod 42 starts to move from the third position to the fourth position. The movement of the connecting rod 42 causes the counting dial block 424 of the connecting rod 42 to move downwards, to remove the limitation on the fourth cantilever 6222 of the pawl 62 from the counting dial block 424, until the delivery stroke ends. When the connecting rod 42 moves to the fourth position, the unlocking stroke ends, the butting arc surface 6242 of the pawl 62 butts against the locking arc surface 639 of the air inlet baffle 63, and the pawl 62 is limited by the air inlet baffle 63 to the ninth position.(5B) Trigger stroke

[0276] After the cover opening stroke, that is, after the outer cover 2 rotates to the second position, the suction nozzle 13 of the powder inhalation device 100 is exposed, and the user may inhale in the position of the suction nozzle 13, to perform the trigger stroke. In a specific implementation, an angle of the outer cover 2 in the second position is 135 degrees.

[0277] When a flow rate of an inhalation airflow of a user is greater than a preset threshold, that is, the negative pressure of the trigger air inlet channel 641 is greater than a preset value, the air inlet baffle 63 rotates from the eleventh position to the twelfth position, and the trigger air inlet channel 641 is opened. The swing member 633 of the air inlet baffle 63 is separated from the first butting portion 6241 of the second cantilever 624 of the pawl 62, the limitation on the pawl 62 is removed, and the fourth elastic member 67 drives the pawl 62 to rotate from the ninth position to the tenth position. In a specific implementation, when an inhalation flow amount of a user reaches more than 15 LPM, the trigger mechanism is triggered to perform a trigger stroke.

[0278] In a process in which the pawl 62 rotates from the ninth position to the tenth position, the pressing block 629 of the pawl 62 squeezes the second elastic arm snap 538 of the mounting base 51 to deform, the second elastic arm snap 538 is triggered to remove the limitation on the dose protection plate 61, so that the second elastic member 65 drives the dose protection plate 61 to move from the seventh position to the eighth position, and the measuring cup 523 of the dose plate 522 is exposed in the airflow channel QI . In addition, the pawl 62 drives the air inlet baffle 63 to rotate from the twelfth position to the thirteenth position, so that the trigger air inlet channel 641 is opened to a maximum angle.

[0279] When the pawl 62 is in the tenth position, the pawl 62 is engaged with a next tooth of the ones counting wheel 82, and the pawl 62 limits the air inlet baffle 63 to the thirteenth position. After the trigger air inlet channel 641 is opened, external atmosphere may enter the airflow channel QI through the external air inlet 14 and the trigger air inlet channel 641. After flowing through the airflow channel QI and carrying the powder in the measuring cup 523, the external atmosphere enters the swirling cavity 73 through the powder inlet 518. After being deagglomerated in the swirling cavity 73, the powder finally flows to the suction nozzle 13 through the powder outlet 74 and the powder outlet channel 721, to be inhaled by the user, thereby implementing an inhalation trigger function.

[0280] In this disclosure, the delivery stroke of the delivery mechanism and the inhalation trigger stroke of the user are classified as two independent phases, so that the problem of accidental inhalation of the user in the delivery stroke can be effectively avoided.(5C) Cover closing stroke

[0281] A process in which the outer cover 2 performs reset rotation from the second position to the first position is defined as a cover closing stroke. After the trigger stroke, in the process in which the outer cover 2 performs reset rotation from the second position to the first position, the cam 22 drives the connecting rod 42 to perform reset movement from the fourth position to the third position and compress the compression spring 45. The cover closing stroke includes a counting stroke and a dose resetting stroke that are sequentially set. In an implementation, the torque in the cover closing stroke ranges from 0.14 to 0.40 N m.

[0282] In the counting stroke, the connecting rod 42 starts to perform reset movement from the fourth position to the third position. The counting dial block 424 of the connecting rod 42 butts against the fourth cantilever 6222 of the pawl 62, to drive the pawl 62 to the connectingrod performs a reset movement from the fourth position to the third position. The process in which the pawl 62 performs reset rotation from the tenth position to the ninth position drives the ones counting wheel 82 to make a step forward and count one. In this process, the first butting portion 6241 of the second cantilever 624 of the pawl 62 removes the limitation on the air inlet baffle 63, and the second butting portion 628 applies a trigger force for reverse resetting to the air inlet baffle 63 by butting against the second bevel 6332 of the swing member 633, so that the third elastic member 66 drives the air inlet baffle 63 to perform reset rotation from the thirteenth position to the eleventh position. In this disclosure, counting is implemented only in a cover closing and resetting stroke after the trigger mechanism is triggered and the user inhales the powder, thereby ensuring precise administration and counting precision. When the connecting rod 42 is reset to the third position, the air pressing mechanism is also reset.

[0283] According to the powder inhalation device 100 provided in this disclosure, a plurality of functional mechanisms are assembled and linked to each other to implement various functions. The powder inhalation device 100 has fewer parts and a simple structure, is easy to assemble, and has low costs. In the cover opening and closing processes, the functional mechanisms are linked and cooperate with each other, so that cover opening and closing actions are continuous, the structure is more reliable, an anti -interference capability of the device is strong, and the device is not opened accidentally under an impact of an external force. The functional mechanisms of the powder inhalation device 100 have a short transmission chain and a low manufacturing precision requirement, to help reduce costs. In the cover opening and closing processes, movement speeds of the functional structures are mainly determined by structures and performance of elastic members, and is irrelevant to action speeds and states of the cam 22 of the outer cover 2 and the connecting rod 42, and stability is high.SELECTED EMBODIMENTS

[0284] Although the above description and the attached claims disclose a number of aspects of the invention, other alternative aspects are disclosed in the following further embodiments.I. Deagglomeration Mechanism

[0285] Existing powder inhalation devices can be prone to problems, such as situations where a powder disaggregation effect is poor and powder emptying and utilization rates are low. In the following embodiments, a deagglomeration mechanism and a powder inhalation device is disclosed so as to reduce or eliminate these problems:

[0286] Embodiment 1. A deagglomeration mechanism, comprising: a swirling member; and a flow guide member cooperating with the swirling member to form a swirling cavity, wherein a top wall of the swirling cavity has a powder inlet, a bottom wall of the swirling cavity has a powder outlet, and the flow guide member has a powder outlet channel communicating with the powder outlet.

[0287] Embodiment 2. The deagglomeration mechanism of Embodiment 1, wherein a surface of the swirling member close to the flow guide member has a swirling groove, a bottom wall of the swirling groove is used as the top wall of the swirling cavity, a first fin and a second fin are connected to the bottom wall of the swirling groove, the first fin and a side wall of the swirling groove are spaced apart from each other to form a first tangential air inlet groove, the second fin and the side wall of the swirling groove are spaced apart from each other to form a second tangential air inlet groove, and a mixing groove is formed between the first fin and the second fin; the powder inlet is located on a bottom wall of the first tangential air inlet groove; and the flow guide member covers the swirling groove, to form the swirling cavity.

[0288] Embodiment 3. The deagglomeration mechanism of Embodiment 2, wherein the powder inlet is located at a first end of the first tangential air inlet groove, and the first end of the first tangential air inlet groove communicates with the mixing groove.

[0289] Embodiment 4. The deagglomeration mechanism of Embodiment 2 or 3, wherein a surface of the flow guide member close to the swirling member has two inclined flow guide convex ribs; the two inclined flow guide convex ribs are respectively embedded in the first tangential air inlet groove and the second tangential air inlet groove; heights of the inclined flow guide convex ribs gradually increase in air inlet directions of the first tangential air inlet groove and the second tangential air inlet groove; and projections of the inclined flow guide convex ribs on the swirling member cover the powder inlet.

[0290] Embodiment 5. The deagglomeration mechanism of Embodiment 4, wherein the surface of the flow guide member close to the swirling member further has a connecting rib matching the mixing groove, and the powder outlet runs through the connecting rib; and a top surface of the connecting rib is connected to flow guide bevels of the inclined flow guide convex ribs.

[0291] Embodiment 6. The deagglomeration mechanism of Embodiment 1, wherein a surface of the flow guide member close to the swirling member has a swirling groove, and theswirling groove comprises a mixing groove and a first tangential air inlet groove and a second tangential air inlet groove that respectively communicate with two opposite side walls of the mixing groove; and the powder outlet is located on a bottom wall of the mixing groove, and a distance between the powder outlet and a side surface of the mixing groove is not greater than 2 mm.

[0292] Embodiment 7. The deagglomeration mechanism of Embodiment 6, wherein the swirling member covers the swirling groove, to form the swirling cavity; a surface of the swirling member close to the flow guide member has a cylindrical protrusion and a plurality of inclined flow guide ribs, and heights of the inclined flow guide ribs gradually increase in air inlet directions of the first tangential air inlet groove and the second tangential air inlet groove; and a height of the cylindrical protrusion is greater than a maximum height of the inclined flow guide ribs.

[0293] Embodiment 8. The deagglomeration mechanism of Embodiment 7, wherein two inclined flow guide ribs are provided, the two inclined flow guide ribs are positioned centrally symmetrically, and a radian of an outer side surface of each of the inclined flow guide ribs is greater than 90 degrees; and the inclined flow guide rib is embedded in the mixing groove, the outer side surface of the inclined flow guide rib is a circular arc surface and is attached to the side surface of the mixing groove, and an inner side surface of the inclined flow guide rib is a circular arc surface and is attached to a side surface of the cylindrical protrusion.

[0294] Embodiment 9. The deagglomeration mechanism of Embodiment 7 or 8, wherein the powder inlet runs through the inclined flow guide rib.

[0295] Embodiment 10. The deagglomeration mechanism of Embodiment 9, wherein the powder inlet is in a slope start position of a flow guide bevel of the inclined flow guide rib.

[0296] Embodiment 11. The deagglomeration mechanism of Embodiment 6, wherein the swirling member covers the swirling groove, to form the swirling cavity; a surface of the swirling member close to the flow guide member has a pillar-shaped protrusion and a plurality of inclined flow guide ribs, and the plurality of inclined flow guide ribs are positioned around the pillar-shaped protrusion; and a side surface of the pillar-shaped protrusion has a baffle or a side surface of the powder outlet has a baffle, the baffle is spaced apart from the powder inlet, and a projection of the baffle on the swirling member covers the powder inlet.

[0297] Embodiment 12. A powder inhalation device, comprising: a powder container, having the bottom provided with a powder exit; and a delivery mechanism positioned at the bottom of the powder container, wherein an airflow channel is formed between the delivery mechanism and the powder container; the delivery mechanism comprises a mounting base and a dose assembly; the dose assembly is slidably positioned between the mounting base and the powder container; and the dose assembly is movable to and fro between the powder exit and the airflow channel to deliver powder in the powder container onto the airflow channel; and a deagglomeration mechanism positioned at the bottom of the powder container, wherein the deagglomeration mechanism is the deagglomeration mechanism of any one of Embodiments 1 to 11; and one end of the airflow channel communicates with the swirling cavity through the powder inlet.

[0298] Embodiment 13. The powder inhalation device of Embodiment 12, wherein the swirling cavity comprises a mixing cavity and a first tangential air inlet channel and a second tangential air inlet channel that respectively communicate with two opposite side walls of the mixing cavity; and an airflow amount of the airflow channel occupies 8% to 25% of a total airflow amount of the airflow channel, the first tangential air inlet channel, and the second tangential air inlet channel.

[0299] Embodiment 14. The powder inhalation device of Embodiment 12, wherein the mounting base is integrally formed with the swirling member.II. Delivery Mechanism

[0300] A feature of all current marketed powder inhalation devices is that inhalation and administration occur at the same time. That is, when a patient opens a cover and inhales, a medicine is inhaled by a user with an airflow. Consequently, undesirable situations such as powder exposure, powder leakage, or powder dampening easily occur, resulting in powder waste. In the following embodiments, a delivery mechanism and a powder inhalation device is described that reduces or eliminates the problem that powder is easily wasted in the existing powder inhalation device.

[0301] Embodiment 1. A delivery mechanism, comprising: a mounting base; and a dose assembly slidably positioned on the mounting base, wherein the dose assembly is movable to and fro between a fifth position and a sixth position; and one of the mounting base and the doseassembly comprises a first elastic arm snap and the other comprises a snap-fit portion that has a complementary fit to the first elastic arm snap.

[0302] Embodiment 2. The delivery mechanism of Embodiment 1, wherein a surface of the mounting base has a sliding groove and the snap-fit portion is positioned on a first side surface of the sliding groove; and the dose assembly is slidably positioned in the sliding groove, the first elastic arm snap is positioned on a side of the dose assembly, and an end of the first elastic arm snap butts against the first side surface of the sliding groove.

[0303] Embodiment 3. The delivery mechanism of Embodiment 2, wherein the dose assembly comprises: a slider having a first surface and an opposite second surface; a dose plate positioned on the first surface of the slider; and a fifth elastic member positioned between the slider and the dose plate, wherein the first elastic arm snap is positioned on a side surface of the slider.

[0304] Embodiment 4. The delivery mechanism of Embodiment 3, wherein the fifth elastic member comprises two springs spaced apart in a sliding direction of the slider; a first receiving groove is provided in a position on the first surface of the slider corresponding to a spring; and / or a second receiving groove is provided in a position on a surface of the dose plate close to the slider corresponding to the spring.

[0305] Embodiment 5. The delivery mechanism of Embodiment 3, wherein a bottom surface of the sliding groove has a first avoidance groove; and the second surface of the slider has a second avoidance groove corresponding to the first avoidance groove, wherein the first elastic arm snap is positioned in the second avoidance groove and is suspended through the first avoidance groove.

[0306] Embodiment 6. A powder inhalation device, comprising: a powder container having the bottom with a powder outlet and a powder exit; and a delivery mechanism positioned at the bottom of the powder container, wherein an airflow channel is formed between the delivery mechanism and the powder container; when the dose assembly is located in a fifth position, a measuring cup of the dose assembly is aligned with the powder exit; and when the dose assembly is located in a sixth position, the measuring cup of the dose assembly is located on the airflow channel, wherein the delivery mechanism is the delivery mechanism of any one of Embodiments 1 to 5.

[0307] Embodiment 7. The powder inhalation device of Embodiment 6, further comprising: an air pressing mechanism comprising a connecting rod and the powder container, wherein the connecting rod is movable between a third position and a fourth position and the connecting rod comprises a protruding structure, wherein when the dose assembly is in the fifth position, a position between the dose assembly and the mounting base is limited by the first elastic arm snap and the snap-fit portion; and in a process in which the connecting rod moves from the third position to the fourth position, the protruding structure triggers removal of the limitation between the dose assembly and the mounting base.

[0308] Embodiment 8. The powder inhalation device of Embodiment 7, wherein the delivery mechanism is the delivery mechanism of any one of Embodiments 2 to 5; and an end of the first elastic arm snap has a thickened portion, the thickened portion has a bevel, and in a process in which the connecting rod moves from the third position to the fourth position, the protruding structure butts against the bevel of the thickened portion and squeezes the thickened portion, to cause the first elastic arm snap to be away from the snap-fit portion.

[0309] Embodiment 9. The powder inhalation device of Embodiment 7, wherein a side of the dose assembly further has a resetting convex post; the protruding structure has a bevel, and in a process in which the connecting rod performs reset movement from the fourth position to the third position, the resetting convex post is squeezed by using the bevel of the protruding structure, to cause the dose assembly to perform reset movement from the sixth position to the fifth position.

[0310] Embodiment 10. The powder inhalation device of Embodiment 7, wherein a side surface of the protruding structure has a guide rib; and the mounting base has a guide groove, and the guide rib is slidably positioned in the guide groove.III. Air Pressing Mechanism

[0311] Existing repository -type powder inhalation devices are prone to powder accumulation, have a trailing effect of administration, cannot implement precise administration, and the powder is prone to be dampened. In the following embodiments, an air pressing mechanism and a powder inhalation device are described that reduce or resolve the problem that the existing powder inhalation device cannot implement precise administration.

[0312] Embodiment 1. An air pressing mechanism, comprising: a powder container having a storage cavity in which powder is stored, wherein a side wall of the storage cavity is provided with a pressure relief hole; and the storage cavity has the top provided with an air pressing port and the bottom provided with a powder exit; an air capsule sleeved on the air pressing port and covering the pressure relief hole; and a compression spring positioned on a side of the air capsule away from the powder container, wherein a pressure of the compression spring is greater than or equal to 1 N and less than or equal to 30 N.

[0313] Embodiment 2. The air pressing mechanism of Embodiment 1, wherein a hole diameter of the pressure relief hole is greater than or equal to 1.0 mm and less than or equal to 2.0 mm.

[0314] Embodiment 3. The air pressing mechanism of Embodiment 1, wherein the powder exit is positioned eccentrically relative to the air pressing port

[0315] Embodiment 4. The air pressing mechanism of Embodiment 1, wherein a speed at which the air capsule is compressed is greater than or equal to 0.1 mm / s and less than or equal to 10 mm / s.

[0316] Embodiment 5. The air pressing mechanism of claim 1, wherein the air pressing port is covered with a waterproof breathable film.

[0317] Embodiment 6. The air pressing mechanism of Embodiment 1, wherein a particle size of the powder is greater than or equal to 50 pm and less than or equal to 500 pm; and the powder exit is in the shape of a circle, and a diameter of the circle is greater than or equal to 0.5 mm and less than or equal to 5 mm; or the powder exit has a length greater than or equal to 3 mm and less than or equal to 10 mm and a width greater than or equal to 2 mm and less than or equal to 5 mm.

[0318] Embodiment 7. The air pressing mechanism of Embodiment 1, wherein an airway groove is provided at the bottom of the powder container, and a bottom wall of the airway groove is provided with a protruding portion.

[0319] Embodiment 8. The air pressing mechanism of Embodiment 7, wherein a corner between the bottom wall and a side wall of the airway groove smoothly transitions through an arc surface.

[0320] Embodiment 9. A powder inhalation device, comprising: the air pressing mechanism of any one of Embodiments 1 to 8; and a delivery mechanism positioned at the bottom of the powder container, wherein an airflow channel is formed between the delivery mechanism and the powder container; the delivery mechanism comprises a mounting base and a dose assembly; the dose assembly is slidably positioned between the mounting base and the powder container; and the dose assembly is movable to and fro between the powder exit and the airflow channel to deliver powder in the powder container onto the airflow channel; a pressure relief opening is further provided on the mounting base, an end of the pressure relief opening correspondingly communicates with the pressure relief hole, and the dose assembly is movable to and fro between a fifth position and a sixth position; and a port at an end of the pressure relief opening away from the pressure relief hole is blocked when the dose assembly is in the fifth position, and an airflow flows through the storage cavity in an air pressing process of the air capsule; and the port at the end of the pressure relief opening away from the pressure relief hole is exposed in a process in which the dose assembly moves from the fifth position to the sixth position, and the airflow sequentially flows through the pressure relief hole and the pressure relief opening to perform pressure relief in the air pressing process of the air capsule.

[0321] Embodiment 10. The powder inhalation device of Embodiment 9, wherein the air pressing mechanism is the air pressing mechanism of Embodiment 7 or 8; the delivery mechanism cooperates with the airway groove to form the airflow channel, and the protruding portion is positioned corresponding to a measuring cup of the dose assembly; and in an airflow direction in the airflow channel, a height and a width of the airflow channel remain unchanged.IV. Powder Inhalation Device

[0322] Generally, powder inhalation devices have a housing and functional mechanisms, and a powder drug dose is delivered in an airflow inhalation manner. Typically, a powder drug dose is transferred via inhalation action from a powder measuring component into a suction nozzle before the powder is finally delivered to a user. However, due to structural limitations in existing powder inhalation devices, linkage of systems of the device in a cover opening process and a cover closing process cannot be advantageously implemented, and there are problems such as an uncontrollable powder delivery amount and easy powder waste. Ultimately, these devices cannot ensure protection of powder such as drug powder when airflow is inhaled at a low rate. In a process of inhaling by a user, airflow has a poor deagglomeration effect on the drug powder. As a result, utilization of the drug powder is low, and it is easy to cause waste ofthe drug powder. In the following embodiment, a powder inhalation device is disclosed that resolves or eliminates the problem that the mechanisms in the powder inhalation device in the existing technology cannot be well linked.

[0323] Embodiment 1. A powder inhalation device, comprising: an air pressing mechanism comprising a powder container, a delivery mechanism positioned at the bottom of the powder container and comprising a mounting base and a dose assembly, wherein an airflow channel is formed between the delivery mechanism and the powder container; the dose assembly is slidably positioned between the mounting base and the powder container; and the dose assembly is configured to deliver powder in the powder container into the airflow channel; a deagglomeration mechanism having a swirling cavity, wherein atop wall of the swirling cavity has a powder inlet communicating with the airflow channel and a bottom wall of the swirling cavity has a powder outlet; and a trigger mechanism comprising an air inlet baffle and a dose protection plate, wherein the dose protection plate is positioned on the airflow channel and blocks a measuring cup of the dose assembly; and the air inlet baffle and the dose protection plate are linked and cooperate with each other, and the air inlet baffle rotates under the action of an airflow and triggers the dose protection plate to move, to cause powder in the measuring cup of the dose assembly to be exposed on the airflow channel.

[0324] Embodiment 2. The powder inhalation device of Embodiment 1, wherein the air pressing mechanism further comprises a pressing plate, an air capsule, a compression spring, and a connecting rod; the connecting rod is movable to and fro between a third position and a fourth position; the compression spring is configured to compress the air capsule and provide power for the connecting rod to move from the third position to the fourth position; the delivery mechanism further comprises a first elastic member; the dose assembly is movable to and fro between a fifth position and a sixth position; the first elastic member is configured to provide power for the dose assembly to move from the fifth position to the sixth position; the trigger mechanism further comprises a bracket, a pawl, a second elastic member, a third elastic member, and a fourth elastic member; the bracket has a trigger air inlet channel, and the air inlet baffle is rotatably connected to the bracket; the dose protection plate is movable to and fro between a seventh position and an eighth position, and blocks, when being in the seventh position, the measuring cup of the dose assembly; the second elastic member is configured to provide power for the dose protection plate to move from the seventh position to the eighth position; the pawl is rotatable to and fro between a ninth position and a tenth position; thefourth elastic member is configured to provide power for the pawl to rotate from the ninth position to the tenth position; the air inlet baffle is rotatable to and fro between an eleventh position and a twelfth position, and blocks, when being in the eleventh position, the trigger air inlet channel; the third elastic member is configured to limit the air inlet baffle to the eleventh position, and provide power for the air inlet baffle to perform reset rotation from the twelfth position to the eleventh position when the air inlet baffle is in the twelfth position.

[0325] Embodiment 3. The powder inhalation device of Embodiment 2, further comprising: a housing comprising a suction nozzle, wherein the suction nozzle communicates with the powder outlet; an outer cover rotatably connected to the housing, and rotatable to and fro between a first position and a second position, wherein the outer cover is configured to block the suction nozzle when the outer cover is in the first position; and the outer cover is configured to unblock the suction nozzle when the outer cover is in the second position; and a counting mechanism, comprising a ones counting wheel, wherein the outer cover comprises a cover body and a cam, and the cam butts against one end of the connecting rod; and when the outer cover is configured in the first position, the cam limits the connecting rod to the third position, the connecting rod limits the pawl to the ninth position, the pawl is engaged with one tooth of the ones counting wheel, the mounting base limits the dose assembly to the fifth position, the mounting base limits the dose protection plate to the seventh position, and the third elastic member limits the air inlet baffle to the eleventh position.

[0326] Embodiment 4. The powder inhalation device of Embodiment 3, wherein in a process in which the outer cover rotates from the first position to the second position, the cam gradually moves aside, to cause the compression spring to drive the connecting rod to move from the third position to the fourth position; a stroke by which the outer cover rotates from the first position to the second position is defined as a cover opening stroke; the cover opening stroke comprises an air pressing stroke and a delivery stroke, and an unlocking stroke that is performed synchronously with the air pressing stroke and the delivery stroke; in the air pressing stroke, the connecting rod starts to move from the third position to the fourth position, and the compression spring compresses the air capsule to press air into the powder container, to load the powder in the powder container into the measuring cup of the dose assembly; in the delivery stroke, the connecting rod continues to move to the fourth position and remove the limitation on the dose assembly from the mounting base, to cause the first elastic member to drive the dose assembly to move from the fifth position to the sixth position; and in the unlocking stroke,the connecting rod moves and removes the limitation on the pawl, and the pawl butts against the air inlet baffle and is limited to the ninth position.

[0327] Embodiment 5. The powder inhalation device of Embodiment 4, wherein after the cover opening stroke, when a negative pressure of the trigger air inlet channel is greater than a preset value, the air inlet baffle rotates from the eleventh position to the twelfth position and removes the limitation on the pawl, and the fourth elastic member drives the pawl to rotate from the ninth position to the tenth position; in a process in which the pawl rotates from the ninth position to the tenth position, the dose protection plate is triggered to have the limitation removed, to cause the second elastic member to drive the dose protection plate to move from the seventh position to the eighth position, and cause the pawl to drive the air inlet baffle to rotate from the twelfth position to a thirteenth position; and when the pawl is in the tenth position, the pawl is engaged with a next tooth of the ones counting wheel, and the pawl limits the air inlet baffle to the thirteenth position.

[0328] Embodiment 6. The powder inhalation device of Embodiment 5, wherein in a process in which the outer cover performs reset rotation from the second position to the first position, the cam drives the connecting rod to perform reset movement from the fourth position to the third position and compress the compression spring; the process in which the outer cover performs reset rotation from the second position to the first position is defined as a cover closing stroke; the cover closing stroke comprises a counting stroke and a dose resetting stroke that are sequentially set; in the counting stroke, the connecting rod starts to perform reset movement from the fourth position to the third position, and drives the pawl to perform reset rotation from the tenth position to the ninth position; the process in which the pawl performs reset rotation from the tenth position to the ninth position drives the ones counting wheel to make a step forward and count one, and the limitation on the air inlet baffle is removed, to cause the third elastic member to drive the air inlet baffle to perform reset rotation from the thirteenth position to the eleventh position; and in the dose resetting stroke, the connecting rod continues to perform reset movement, drives the dose assembly to perform reset movement from the sixth position to the fifth position, and drives the dose protection plate to perform reset movement from the eighth position to the seventh position.

[0329] Embodiment 7. The powder inhalation device of Embodiment 6, wherein the side surface of the cam comprises a plane segment, a first circular arc surface segment, and a second circular arc surface segment that are sequentially connected, and an end of the plane segmentaway from the first circular arc surface segment is provided with a limiting bump; and when the outer cover is configured in the first position, a butting end of the connecting rod butts against a side of the limiting bump of the cam away from the plane segment, wherein in the air pressing stroke, the butting end of the connecting rod crosses the limiting bump and slides to a joint between the first circular arc surface segment and the second circular arc surface segment along the plane segment and the first circular arc surface segment; in the delivery stroke, the butting end of the connecting rod slides from the joint between the first circular arc surface segment and the second circular arc surface segment to an end of the second circular arc surface segment away from the first circular arc surface segment; and in the counting stroke and the dose resetting stroke, the butting end of the connecting rod slides from one end of the second circular arc surface segment away from the plane segment to the limiting bump along the second circular arc surface segment, the first circular arc surface segment, and the plane segment sequentially and crosses the limiting bump.

[0330] Embodiment 8. The powder inhalation device of Embodiment 7, wherein a torque in the cover opening stroke ranges from 0.07 to 0.28 Nm.

[0331] Embodiment 9. The powder inhalation device of Embodiment 7, wherein a torque in the cover closing stroke ranges from 0.14 to 0.40 Nm.

[0332] Embodiment 10. The powder inhalation device of Embodiment 3, wherein the cover body and the cam are integrally formed.V. Trigger Mechanism

[0333] A powder inhalation device generally stores powder through a powder container, and through a mechanical structure a dose of drug powder is transferred from the powder container into an airflow channel before each inhalation. A user inhales air through a suction nozzle of the device, which in turn, generates an airflow therethrough. Under the action of the airflow, the drug powder particles exit the device and enter a respiratory system of the user through the airflow channel.

[0334] A repository-type powder inhalation device is a commonly used powder aerosol drug delivery device on the market due to a large powder loading dose and a high price-performance ratio. These existing powder inhalation devices often suffer from deficiencies that become apparent during the inhalation process. One of these deficiencies is that the airflow has a poordeagglomeration effect on the drug powder. This results in low and / or inefficient transfer of the drug powder from the device to the user’s lungs, and results in incomplete drug dosing and waste of the drug powder.

[0335] In the following embodiment, a powder inhalation device is disclosed that provides a trigger mechanism that reduces or eliminates problems associated with conventional airflow that leads to poor deagglomeration effects on drug powder and wasted drug powder.

[0336] Embodiment 1. A trigger mechanism, comprising: a bracket having a trigger air inlet channel; and an air inlet baffle rotatably positioned on the bracket, and rotatable to and fro between an eleventh position and a thirteenth position, wherein the air inlet baffle passes a twelfth position when rotating from the eleventh position to the thirteenth position; the air inlet baffle comprises a second rotating shaft and a door plate connected to a side of the second rotating shaft; and the door plate comprises a first separation portion, wherein the second rotating shaft is positioned outside a side wall of the trigger air inlet channel, and the door plate has one part positioned in the trigger air inlet channel and the other part extending to the second rotating shaft; and when the air inlet baffle rotates between the eleventh position and the twelfth position, the first separation portion cooperate with the side wall of the trigger air inlet channel, to block the trigger air inlet channel.

[0337] Embodiment 2. The trigger mechanism of Embodiment 1, wherein the bracket has a second separation portion, and the second separation portion has a second arc surface; the door plate comprises a connecting portion, a bent portion, and a blocking portion; the connecting portion has a first end connected to the second rotating shaft and a second end connected to a first end of the bent portion; the blocking portion is located on a side of the bent portion away from the connecting portion and is connected to a second end of the bent portion; the bent portion is used as the first separation portion, and the bent portion is located on a side of the second separation portion away from the second rotating shaft; and the blocking portion and the bent portion are both located in the trigger air inlet channel when the air inlet baffle is in the eleventh position; or the door plate comprises a connecting portion, a blocking portion, and the first separation portion, and the connecting portion has a first end connected to the second rotating shaft and a second end connected to the blocking portion; the first separation portion is located on a side of the blocking portion close to the second rotating shaft, and the first separation portion has a first end connected to the connecting portion or the blocking portion and a second end being a free end, wherein when the air inlet baffle rotates between the eleventhposition and the twelfth position, the first separation portion cooperate with the second arc surface, to block the trigger air inlet channel.

[0338] Embodiment 3. The trigger mechanism of Embodiment 2, wherein the trigger air inlet channel has a top wall and an annular side wall; the top wall of the trigger air inlet channel has an air inlet; the annular side wall of the trigger air inlet channel comprises a first side wall and a second side wall that are oppositely positioned in an extension direction of the second rotating shaft; an edge of the first side wall away from the top wall has a first air inlet groove; and / or an edge of the second side wall away from the top wall has a first air inlet groove.

[0339] Embodiment 4. The trigger mechanism of Embodiment 3, wherein the first air inlet groove is a V-shaped groove, the door plate comprises the connecting portion, the bent portion, and the blocking portion, and an angle between two side surfaces of the first air inlet groove is the same as an angle between the blocking portion and the bent portion.

[0340] Embodiment 5. The trigger mechanism of Embodiment 2, wherein the trigger air inlet channel has a top wall and an annular side wall, and the annular side wall of the trigger air inlet channel comprises a third side wall and a fourth side wall that are oppositely positioned in a direction perpendicular to the second rotating shaft; the third side wall is located on a side of the fourth side wall away from the second rotating shaft; and an edge of the third side wall away from the top wall of the trigger air inlet channel has a second air inlet groove.

[0341] Embodiment 6. The trigger mechanism of Embodiment 2, wherein the trigger air inlet channel has a top wall and an annular side wall; the top wall of the trigger air inlet channel has an air inlet; the annular side wall of the trigger air inlet channel comprises a first side wall and a second side wall that are oppositely positioned along the second rotating shaft, and a third side wall and a fourth side wall that are oppositely positioned in a direction perpendicular to the second rotating shaft; the third side wall is located on a side of the fourth side wall away from the second rotating shaft; and an edge of the first side wall away from the top wall has a first air inlet groove; an edge of the third side wall away from the top wall has a second air inlet groove, wherein in a process in which the air inlet baffle rotates from the eleventh position to the thirteenth position, the second air inlet groove is first partially opened and then the first air inlet groove is partially opened.

[0342] Embodiment 7. The trigger mechanism of Embodiment 2, wherein the first separation portion has a first arc surface; the annular side wall of the trigger air inlet channelcomprises a third side wall and a fourth side wall that are oppositely positioned in a direction perpendicular to the second rotating shaft; the third side wall is located on a side of the fourth side wall away from the second rotating shaft, and the fourth side wall is used as the second separation portion; and the first arc surface and the second arc surface are both circular arc surfaces whose circle centers are located on the axis of the second rotating shaft, and when the air inlet baffle is in the eleventh position, the door plate blocks the trigger air inlet channel, and the first arc surface is attached to the second arc surface.

[0343] Embodiment 8. The trigger mechanism of Embodiment 7, wherein the door plate comprises the connecting portion, the bent portion, and the blocking portion, and a surface of the bent portion close to the connecting portion is the first arc surface; and an inner surface of the fourth side wall is the second arc surface.

[0344] Embodiment 9. The trigger mechanism of Embodiment 2, wherein the door plate comprises the connecting portion, the bent portion, and the blocking portion; and the door plate further comprises a reinforcing portion, the reinforcing portion has a first edge connected to the blocking portion and a second edge connected to the bent portion.

[0345] Embodiment 10. The trigger mechanism of Embodiment 9, wherein a third edge of the reinforcing portion extends from a second end of the connecting portion to a surface of the blocking portion in an extension direction of the connecting portion.

[0346] Embodiment 11. A powder inhalation device, comprising: a delivery mechanism, comprising a mounting base and a dose assembly; and a trigger mechanism, being the trigger mechanism of any one of Embodiments 1 to 10, wherein the trigger mechanism further comprises a dose protection plate and a pawl; the dose protection plate is movable to and fro between a seventh position and an eighth position; and the pawl is rotatable around the first rotating shaft to and fro between a ninth position and a tenth position, wherein when the dose protection plate is in the seventh position, a measuring cup of the dose assembly is covered; when the dose protection plate is in the eighth position, the measuring cup of the dose assembly is exposed on an airflow channel; and in a process in which the pawl rotates from the ninth position to the tenth position, the dose protection plate has the limitation removed and moves from the seventh position to the eighth position.VI. Powder Inhalation Device I

[0347] Repository -type powder inhalation devices are commonly used due to a large powder loading dose and a high price-performance ratio. However, the functional mechanism of the existing powder inhalation devices are often plagued with large powder transfer issues that result in inaccurate dosage delivery, precise manufacturing tolerance requirements, and powder leakage issues.

[0348] The following embodiments describe a powder inhalation device that reduces or eliminates some of the problems associated with existing powder inhalation devices.

[0349] Embodiment 1. A powder inhalation device, comprising: a delivery mechanism positioned at the bottom of a powder container of the powder inhalation device and comprising a dose assembly, wherein the dose assembly is movable to and fro between a fifth position and a sixth position; and a trigger mechanism comprising a dose protection plate, movable to and fro between a seventh position and an eighth position, wherein when the dose protection plate is in the seventh position, a measuring cup of the dose assembly is covered; and when the dose protection plate is in the eighth position, the measuring cup of the dose assembly is exposed, wherein the trigger mechanism further comprises a second elastic member configured to drive the dose protection plate to move from the seventh position to the eighth position; and when the dose protection plate is limited to the seventh position, the second elastic member is squeezed to deform and accumulate potential energy.

[0350] Embodiment 2. The powder inhalation device of Embodiment 1, further comprising: a pawl, rotatable to and fro between a ninth position and a tenth position, wherein in a process in which the pawl rotates from the ninth position to the tenth position, the dose protection plate has the limitation removed and moves from the seventh position to the eighth position.

[0351] Embodiment 3. The powder inhalation device of Embodiment 2, wherein the delivery mechanism further comprises a second elastic arm snap, and the second elastic arm snap limits the dose protection plate to the seventh position; the pawl comprises a pressing block; and in the process in which the pawl rotates from the ninth position to the tenth position, the pressing block squeezes the second elastic arm snap, to remove the limitation from the dose protection plate.

[0352] Embodiment 4. The powder inhalation device of Embodiment 3, wherein the delivery mechanism further comprises a mounting base, and the mounting base comprises the secondelastic arm snap; and both the dose assembly and the dose protection plate are slidably positioned on the mounting base.

[0353] Embodiment 5. The powder inhalation device of Embodiment 4, wherein the second elastic member is a second torsion spring, and the second torsion spring has one end fixed to the mounting base and the other end fixed to the dose protection plate.

[0354] Embodiment 6. The powder inhalation device of Embodiment 3, wherein the pawl further comprises a second limiting block, and when the pawl is in the ninth position, the second limiting block butts against the second elastic arm snap, to lock the dose protection plate.

[0355] Embodiment 7. The powder inhalation device of Embodiment 2, further comprising: a fourth elastic member, configured to drive the pawl to rotate from the ninth position to the tenth position, wherein the pawl further comprises a first limiting block, and the first limiting block is configured to butt against the fourth elastic member.

[0356] Embodiment 8. The powder inhalation device of Embodiment 7, wherein the pawl further comprises a third limiting block configured to temporarily limit the fourth elastic member.

[0357] Embodiment 9. The powder inhalation device of Embodiment 2, further comprising: an air pressing mechanism comprising a compression spring and a connecting rod, wherein the connecting rod is movable to and fro between a third position and a fourth position; the connecting rod comprises a counting dial block; and the pawl further comprises a fourth cantilever, and one end of the fourth cantilever is a free end, wherein when the connecting rod is in the third position, the counting dial block butts against the free end of the fourth cantilever, to limit the pawl to the ninth position; the pawl has the limitation removed in a process in which the connecting rod moves from the third position to the fourth position; and in a process in which the connecting rod performs reset movement from the fourth position to the third position, the counting dial block butts against the free end of the fourth cantilever to drive the pawl to perform reset rotation from the tenth position to the ninth position, and drive the dose assembly to perform reset movement from the sixth position to the fifth position, and in a process in which the dose assembly performs reset movement, the dose protection plate is driven to perform reset movement from the eighth position to the seventh position.

[0358] Embodiment 10. The powder inhalation device of Embodiment 9, further comprising: a housing comprising a suction nozzle; and an outer cover rotatably connected to the housing, and rotatable to and fro between a first position and a second position, wherein the outer cover is configured to block the suction nozzle when the outer cover is in the first position; and the outer cover is configured to unblock the suction nozzle when the outer cover is in the second position, wherein the outer cover comprises a cover body and a cam, and the cam butts against one end of the connecting rod; and the cam cooperates with the compression spring to drive the connecting rod to move to and fro between the third position and the fourth position.VII. Powder Inhalation Device II

[0359] Repository -type powder inhalation devices are commonly used due to a large powder loading dose and a high price-performance ratio. However, the functional mechanism of the existing powder inhalation devices are often plagued with large powder transfer issues that result in inaccurate dosage delivery and powder leakage issues.

[0360] The following embodiments describe a powder inhalation device that reduces or eliminates some of the problems associated with existing powder inhalation devices.

[0361] Embodiment 1. A powder inhalation device, comprising: a powder container having a bottom surface provided with a powder exit and a third receiving groove, wherein the third receiving groove is spaced apart from the powder exit; a delivery mechanism positioned at the bottom surface of the powder container and comprising a dose assembly, wherein the dose assembly is movable to and fro between a fifth position and a sixth position; and a trigger mechanism comprising a dose protection plate, wherein the dose protection plate is located in the third receiving groove and is movable to and fro between a seventh position and an eighth position; when the dose protection plate is in the seventh position, a measuring cup of the dose assembly is covered; and when the dose protection plate is in the eighth position, the measuring cup of the dose assembly is exposed, wherein when the dose assembly is in the fifth position and the dose protection plate is in the seventh position, the dose assembly elastically butts against the dose protection plate, to attach the dose protection plate to a side surface of the third receiving groove close to the powder exit.

[0362] Embodiment 2. The powder inhalation device according to Embodiment 1, wherein the dose assembly comprises a squeezing elastic arm, and the squeezing elastic arm buttsagainst the dose protection plate; or the dose protection plate comprises a squeezing elastic arm, and the squeezing elastic arm butts against the dose assembly.

[0363] Embodiment 3. The powder inhalation device according to Embodiment 2, wherein the dose assembly comprises a slider, a dose plate, and the squeezing elastic arm; a first surface of the slider has a first limiting wall and a second limiting wall that are spaced apart in a sliding direction of the slider, and the dose plate is snapped between the first limiting wall and the second limiting wall; the squeezing elastic arm has one end connected to the first limiting wall and the other end configured to butt against the dose protection plate; and when the dose assembly is in the fifth position and the dose protection plate is in the seventh position, the other end of the squeezing elastic arm butts against the dose protection plate.

[0364] Embodiment 4. The powder inhalation device according to Embodiment 3, wherein the dose protection plate comprises a first extension portion and a second extension portion that are connected to each other, and the first extension portion has a projection located on the slider and is configured to block the measuring cup; the second extension portion has a projection located outside the slider; and an extension direction of the squeezing elastic arm is parallel to an extension direction of the first extension portion, and the squeezing elastic arm has one end connected to a side wall of the first limiting wall and the other end butting against the second extension portion.

[0365] Embodiment 5. The powder inhalation device according to Embodiment 3, wherein when the dose assembly is in the sixth position and the dose protection plate is in the seventh position, the other end of the squeezing elastic arm is spaced apart from the dose protection plate; when the dose assembly is in the sixth position and the dose protection plate is in the eighth position, the other end of the squeezing elastic arm butts against the dose protection plate; and in a process in which the dose assembly performs reset movement from the sixth position to the fifth position, the dose protection plate is pushed through the squeezing elastic arm to perform reset movement from the eighth position to the seventh position.

[0366] Embodiment 6. The powder inhalation device according to Embodiment 3, wherein the delivery mechanism further comprises: a first elastic member, having an end butting against the first limiting wall, to drive the slider to slide from the fifth position to the sixth position, wherein the first limiting wall has a third avoidance groove; when the slider is in the fifth position, the top of the first limiting wall butts against an end of the first elastic member andsqueezes the first elastic member to bend; and when the slider is in the sixth position, the first elastic member releases elastic potential energy, and an end of the first elastic member is located in the third avoidance groove.

[0367] Embodiment 7. The powder inhalation device according to Embodiment 6, wherein the third avoidance groove is a through hole.

[0368] Embodiment 8. The powder inhalation device according to Embodiment 3, wherein the delivery mechanism further comprises: a first elastic member, butting against the first limiting wall, to drive the slider to slide from the fifth position to the sixth position, wherein an end of the first elastic member is bent to form a smooth transition portion, and the smooth transition portion butts against the first limiting wall.

[0369] Embodiment 9. The powder inhalation device according to Embodiment 3, wherein the delivery mechanism further comprises: a mounting base, wherein the dose assembly and the dose protection plate are slidably positioned on the mounting base; and the mounting base is further configured to limit the dose assembly to the fifth position and limit the dose protection plate to the seventh position.

[0370] Embodiment 10. The powder inhalation device according to Embodiment 9, wherein the trigger mechanism further comprises: a pawl rotatable to and fro between a ninth position and a tenth position, wherein in a process in which the pawl rotates from the ninth position to the tenth position, the limitation on the dose protection plate from the mounting base is removed.

[0371] The foregoing descriptions are merely embodiments of this disclosure and are not intended to limit the scope of this disclosure. An equivalent structural or equivalent process alternation made by using the content of the specification and drawings of this disclosure, or a disclosure of the content of the specification and drawings directly or indirectly to another related technical field, shall fall within the protection scope of this disclosure.

Claims

CLAIMSWhat is claimed is:

1. A trigger mechanism, comprising: a dose protection plate movable to and fro between a seventh position and an eighth position; a pawl comprising a first rotating shaft, wherein the pawl is rotatable around the first rotating shaft to and fro between a ninth position and a tenth position; an air inlet baffle comprising a second rotating shaft, wherein the second rotating shaft and the first rotating shaft are positioned across each other, the air inlet baffle being rotatable around the second rotating shaft between an eleventh position and a twelfth position; wherein when the air inlet baffle is in the eleventh position, the pawl is limited to the ninth position; and when the air inlet baffle is in the twelfth position, the pawl is rotatable from the ninth position to the tenth position and triggers movement of the dose protection plate from the seventh position to the eighth position.

2. The trigger mechanism of claim 1, wherein the pawl further comprises: a plate body, wherein the first rotating shaft is positioned substantially perpendicular to the plate body; and a first cantilever having a first end connected to the plate body and a second end provided with a hook.

3. The trigger mechanism of claim 2, wherein the pawl further comprises a second cantilever having a first end connected to the plate body and a second end with a first butting portion; the air inlet baffle comprises a door plate connected to a first side of the second rotating shaft and a swing member connected to a second side of the second rotating shaft, wherein when the air inlet baffle is in the eleventh position, the swing member butts against the first butting portion of the second cantilever to limit the pawl to the ninth position, and wherein when the air inlet baffle is in the twelfth position, the swing member is separated from the first butting portion of the second cantilever to remove the limitation on the pawl; an end surface of the first butting portion that butts against the swing member is a butting arc surface, and an end surface of the swing member that butts against the first butting portion is a locking arc surface, and when the air inlet baffle is in the eleventh position, the butting arcsurface butts against the locking arc surface to cause potential energy for rotation of the pawl from the ninth position to the tenth position to drive the door plate to press against a bracket to block a trigger air inlet channel of the bracket.

4. The trigger mechanism of claim 3, wherein the butting arc surface and the locking arc surface are eccentrically circular arc surfaces.

5. The trigger mechanism of claim 3, wherein a side surface of the swing member has a first bevel, wherein during rotation of the pawl from the ninth position to the tenth position, the first butting portion butts against the first bevel of the swing member to drive the air inlet baffle to rotate from the twelfth position to the thirteenth position; and wherein when the pawl is in the tenth position, the first butting portion of the second cantilever limits the air inlet baffle to the thirteenth position.

6. The trigger mechanism of claim 5, wherein the pawl further comprises a third cantilever having a first end connected to the plate body and a second end having with a second butting portion and the side surface of the swing member has a second bevel facing away from the first bevel, wherein in a process in which the pawl is reversely reset from the tenth position to the ninth position, the first butting portion of the second cantilever removes the thirteenth position limitation on the air inlet baffle, and the second butting portion applies a trigger force for reverse resetting to the air inlet baffle by butting against the second bevel of the swing member.

7. The trigger mechanism of claim 3, wherein the swing member further comprises a weight.

8. A powder inhalation device, comprising: a delivery mechanism comprising a mounting base and a dose assembly; and a trigger mechanism of any one of claims 1 to 7; wherein when the dose protection plate is in the seventh position, a measuring cup of the dose assembly is covered; when the dose protection plate is in the eighth position, the measuring cup of the dose assembly is exposed to an airflow channel; and in a process in which the pawl rotates from the ninth position to the tenth position, the dose protection plate moves from the seventh position to the eighth position.

9. The powder inhalation device of claim 8, wherein the powder inhalation device further comprises: an air pressing mechanism comprising a connecting rod movable between a third position and a fourth position, the connecting rod comprising a counting dial block; and the pawl further comprises a fourth cantilever having a first end connected to the plate body and a free second end; wherein when the connecting rod is in the third position, the counting dial block butts against the free second end of the fourth cantilever to limit the pawl to the ninth position; the pawl has the ninth position limitation removed when the connecting rod moves from the third position to the fourth position; and when the connecting rod performs a reset movement from the fourth position to the third position, the counting dial block butts against the free end of the fourth cantilever, to drive the pawl to perform reset rotation from the tenth position to the ninth position.

10. The powder inhalation device of claim 9, wherein when the connecting rod is in the third position and the counting dial block is limiting the pawl to the ninth position, the pawl is spaced apart from the air inlet baffle; and after the connecting rod moves from the third position to the fourth position and the pawl has the ninth position limitation removed, the butting arc surface of the pawl butts against a locking arc surface of the air inlet baffle.

11. The powder inhalation device of claim 9, wherein the counting dial block is a stepped structure comprising a first step surface and a second step surface, the second step surface being positioned on a side of the first step surface proximate to the first rotating shaft of the pawl; the free end of the fourth cantilever is a step structure comprising a third step surface and a fourth step surface, the fourth step surface being positioned on a side of the third step surface proximate to the first rotating shaft; when the connecting rod is in the third position, the first step surface is spaced apart from the third step surface and the second step surface is in contact with the fourth step surface; when the connecting rod moves from the third position to the fourth position, the second step surface is separated from the fourth step surface to remove the ninth position limitation on the pawl; after the pawl rotates from the ninth position to the tenth position, the first step surface isin contact with the third step surface and the second step surface is spaced apart from the fourth step surface; and when the connecting rod performs a reset movement from the fourth position to the third position, the first step surface is separated from the third step surface and the second step surface is in contact with the fourth step surface.

Images