Air bag pressing piece, driving cam, air compressing mechanism and powder inhaler

Abstract

The invention discloses an air bag pressing piece, a driving cam, an air compressing mechanism and a powder inhaler. The air bag pressing piece is used for the powder inhaler, a pressure relief hole is formed in the side wall of the air bag pressing piece, and the air bag pressing piece is used for extruding the air compression air bag to enable the air compression air bag to compress air into the storage cavity. By means of the arrangement, the problems that in the prior art, the consistency and uniformity of powder discharging of a powder inhaler are low, and powder is prone to being wasted can be solved, and the consistency and uniformity of powder discharging are improved.

Description

Technical Field

[0001] This application relates to the technical field of inhalation devices, and particularly to an airbag pressing member, a driving cam, a gas compression mechanism, and a powder inhaler. Background Art

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

[0003] However, in existing powder inhalers, when filling the powder in a powder container into a powder metering member, the consistency and uniformity of powder discharge are relatively low, and powder waste is likely to occur. Summary of the Invention

[0004] This application mainly provides an airbag pressing member, a driving cam, a gas compression mechanism, and a powder inhaler to solve the problems of low consistency and uniformity of powder discharge and easy powder waste in existing powder inhalers.

[0005] To solve the above technical problems, a technical solution adopted in this application is: providing an airbag pressing member for a powder inhaler; a pressure relief hole is provided on a side wall of the airbag pressing member; the airbag pressing member is used to squeeze a gas compression airbag.

[0006] Wherein, a convex rod is provided at one end of the side wall of the airbag pressing member away from the top wall, and an arc surface is provided at one end of the convex rod away from the top wall.

[0007] Wherein, a tip is provided at one end of the convex rod away from the top wall, and an end surface of the tip is the arc surface.

[0008] Wherein, the arc surface is a circular arc surface.

[0009] Wherein, a fixing hole is provided on the top wall of the airbag pressing member, and the fixing hole is used to connect the top of the gas compression airbag to drive the gas compression airbag to expand and contract.

[0010] To solve the above technical problems, another technical solution adopted in this application is: providing a driving cam for a powder inhaler, including:

[0011] A body part;

[0012] A gear coaxially connected to the body part for driving the body part to rotate;

[0013] Wherein, a guiding groove is provided on one surface of the body part, and a side surface of the guiding groove is a cam curved surface.

[0014] Wherein, an arc-shaped groove is provided on an outer peripheral side surface of the body part at one end of the cam curved surface.

[0015] Wherein, the gear is disposed on a surface of the body portion, and the guiding groove is disposed on the surface of the body portion facing the gear and is spaced apart from the gear;

[0016] The cam surface includes a first curved surface segment and a second curved surface segment connected to each other. The second curved surface segment is located at an end of the first curved surface segment away from the arc-shaped groove. The first curved surface segment is a non-circular arc surface, and the second curved surface segment is a circular arc surface and is concentrically arranged with the outer peripheral side surface of the body portion.

[0017] Wherein, a stop groove is disposed at an end of the second curved surface segment away from the first curved surface segment.

[0018] Wherein, the arc-shaped groove and / or the stop groove is a circular arc-shaped groove.

[0019] Wherein, the surface of the body portion facing away from the gear has a rib; one end of the rib is disposed corresponding to an end of the second curved surface segment close to the first curved surface segment.

[0020] Wherein, the surface of the body portion facing away from the gear further has an annular boss; the annular boss is coaxially arranged with the gear.

[0021] To solve the above technical problems, another technical solution adopted by the present application is: to provide a gas compression mechanism, including:

[0022] A gas compression airbag;

[0023] An elastic member;

[0024] Any one of the airbag pressing members as described above; and / or

[0025] Any one of the driving cams as described above.

[0026] Wherein, the arc surface of the convex rod cooperates with the cam surface of the driving cam to realize the reciprocating movement of the airbag pressing member between the fifth position and the sixth position;

[0027] When the airbag pressing member is in the initial position, the tip of the convex rod is embedded in the arc-shaped groove of the cam surface to realize the initial positioning of the airbag pressing member.

[0028] To solve the above technical problems, another technical solution adopted by the present application is: to provide a powder inhaler, including:

[0029] A powder delivery mechanism, including a powder container; the powder container has a storage cavity. The first end of the storage cavity has a powder outlet, and the second end has a gas compression port; the side wall of the storage cavity has a ventilation hole;

[0030] The gas compression mechanism as described above;

[0031] Wherein, the compressed air bag is arranged at the second end of the storage cavity and is connected to the compressed air port; the air bag pressing piece is movably sleeved on the outer side of the compressed air bag and the storage cavity;

[0032] The driving cam and the elastic member are used to drive the airbag pressure piece to move back and forth between the fifth position and the sixth position, thereby driving the compressed air bag to expand and contract; when the airbag pressure piece is configured to the fifth position, the side wall of the airbag pressure piece blocks the vent hole, and the pressure relief hole is not connected to the vent hole; when the airbag pressure piece is configured to the sixth position, the pressure relief hole is connected to the vent hole to relieve pressure in the storage chamber.

[0033] Wherein, the powder inhaler further comprises:

[0034] A filter membrane is arranged at the second end of the storage cavity; the filter membrane is located at the compressed air port and is spaced apart from the port of the compressed air port; one end of the vent is connected to the space between the filter membrane and the compressed air bag;

[0035] A housing assembly having a suction nozzle;

[0036] an outer cover, rotatably connected to the housing assembly and capable of reciprocating between a first position and a second position; when the outer cover is configured to be in the first position, the outer cover covers the suction nozzle; when the outer cover is configured to be in the second position, the suction nozzle is exposed;

[0037] The powder delivery mechanism further includes a powder metering wheel; the powder container further includes an inhalation channel, the inhalation nozzle is connected to the inhalation channel; the powder metering wheel is rotatably connected to the powder container; the powder metering wheel includes a dosage cup; the powder metering wheel can rotate back and forth between a third position and a fourth position; when the powder metering wheel is configured to the third position, the dosage cup is correspondingly arranged at the powder outlet of the storage chamber for receiving the powder from the powder container; when the powder metering wheel is configured to the fourth position, the dosage cup is correspondingly arranged at the entrance of the inhalation channel;

[0038] The outer cover is respectively linked with the powder metering wheel and the air compression mechanism; when the outer cover is configured to be in the first position, the airbag pressure piece is limited to the fifth position; during the process of the outer cover rotating from the first position to the second position, the airbag pressure piece is firstly released from the limit, so that the elastic member drives the airbag pressure piece to move from the fifth position to the sixth position, and then drives the powder metering wheel to rotate from the third position to the fourth position;

[0039] During the process of the outer cover reversing and resetting from the second position to the first position, the powder metering wheel is driven to reverse and reset, and the airbag pressing member is driven to move reversely and reset to the fifth position.

[0040] The beneficial effects of this application are as follows: Different from the prior art, this application discloses an airbag pressing member, a driving cam, a gas pressing mechanism, and a powder inhaler. The airbag pressing member is used for a powder inhaler, and the side wall of the airbag pressing member has a pressure relief hole. The airbag pressing member is used to squeeze the gas pressing airbag, so that the gas pressing airbag presses air into the storage cavity. Through the above settings, the problems of low consistency and uniformity of powder discharge and easy powder waste in the prior art powder inhaler can be solved, and the consistency and uniformity of powder discharge can be improved. Description of the Drawings

[0041] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0042] Figure 1 is a schematic structural diagram of a powder inhaler provided by an embodiment of this application in an unopened state;

[0043] Figure 2 is Figure 1 a schematic structural diagram of the powder inhaler provided in an opened state;

[0044] Figure 3 is Figure 1 a schematic structural diagram of the powder inhaler provided in another opened state;

[0045] Figure 4 is Figure 3 a schematic structural diagram of the powder inhaler provided from another angle;

[0046] Figure 5A is Figure 1 a schematic structural diagram of the outer cover of the powder inhaler provided from an angle;

[0047] Figure 5B is Figure 5A a schematic structural diagram of the outer cover provided from another angle;

[0048] Figure 6A is Figure 1 a schematic structural diagram of the powder inhaler provided from an angle after removing the outer cover;

[0049] Figure 6B is Figure 1Schematic diagram of the powder inhaler provided from another angle after removing the outer cover;

[0050] Figure 7A is Figure 2 Schematic diagram of the powder inhaler provided from another angle;

[0051] Figure 7B is Figure 7A Partial enlarged schematic diagram of the powder inhaler provided;

[0052] Figure 8A is Figure 1 Schematic diagram of the powder inhaler provided after removing the outer cover;

[0053] Figure 8B is Figure 8A Partial enlarged schematic diagram of the powder inhaler provided;

[0054] Figure 9A is Figure 1 Cross-sectional schematic diagram of the powder inhaler provided in a certain state after removing the outer cover;

[0055] Figure 9B is Figure 1 Cross-sectional schematic diagram of the powder inhaler provided in another state after removing the outer cover;

[0056] Figure 9C is Figure 1 Cross-sectional schematic diagram of the powder inhaler provided from another angle in a certain state after removing the outer cover;

[0057] Figure 9D is Figure 1 Cross-sectional schematic diagram of the powder inhaler provided from another angle in another state after removing the outer cover;

[0058] Figure 9E is Figure 9C Partial enlarged schematic diagram of region A;

[0059] Figure 9F is Figure 9D Partial enlarged schematic diagram of region A;

[0060] Figure 9G is Figure 9C Partial enlarged schematic diagram of region B;

[0061] Figure 9H is Figure 9C Schematic diagram of the L-shaped air inlet channel of the powder inhaler provided;

[0062] Figure 10A is Figure 1 Schematic diagram of the drive cam of the powder inhaler provided from a certain angle;

[0063] Figure 10B Is Figure 10A The structural schematic diagram of the driving cam provided at another angle;

[0064] Figure 10C Is the structural schematic diagram of the driving cam provided by 10A at another angle,

[0065] Figure 11 Is Figure 1 The structural schematic diagram of the airbag pressing part of the powder inhaler provided;

[0066] Figure 12A Is Figure 1 The structural schematic diagram of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided when it is in the third position in the powder container;

[0067] Figure 12B Is Figure 1 The structural schematic diagram of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided when it is in the fourth position in the powder container;

[0068] Figure 13A Is Figure 1 The structural schematic diagram of the powder container of the powder inhaler provided at an angle;

[0069] Figure 13B Is Figure 13A The structural schematic diagram of the powder container provided at another angle;

[0070] Figure 14A Is Figure 1 The structural schematic diagram of the powder metering wheel of the powder inhaler provided at an angle;

[0071] Figure 14B Is the structural schematic diagram of the powder metering wheel provided by 14A at another angle;

[0072] Figure 15A Is Figure 1 The structural schematic diagram of the inhalation trigger device of the powder inhaler provided when it is in a state on the powder container;

[0073] Figure 15B Is Figure 15A The structural schematic diagram of the inhalation trigger device provided when it is in another state on the powder container;

[0074] Figure 16A Is Figure 15A The structural schematic diagram of the inhalation trigger device provided after removing the powder container;

[0075] Figure 16B Is Figure 15B The structural schematic diagram of the inhalation trigger device provided after removing the powder container;

[0076] Figure 17A is Figure 16A The structural schematic diagram of the provided inspiration trigger device from another angle;

[0077] Figure 17B is Figure 16B The structural schematic diagram of the provided inspiration trigger device from another angle;

[0078] Figure 18A is Figure 1 The exploded structural schematic diagram of the counting mechanism of the provided powder inhaler;

[0079] Figure 18B is Figure 18A The assembled structural schematic diagram of the provided counting mechanism;

[0080] Figure 19A is Figure 18A The structural schematic diagram of the counter base of the provided counting mechanism from one angle;

[0081] Figure 19B is Figure 19A The structural schematic diagram of the counter base from another angle;

[0082] Figure 20 is Figure 1 The structural schematic diagram of the dose protection plate of the inspiration trigger device of the provided powder inhaler;

[0083] Figure 21A is Figure 1 The assembled cross-sectional schematic diagram of the powder metering wheel and the dose protection plate of the provided powder inhaler in one state;

[0084] Figure 21B is Figure 1 The assembled cross-sectional schematic diagram of the powder metering wheel and the dose protection plate of the provided powder inhaler in another state;

[0085] Figure 21C is Figure 21A The partial enlarged schematic diagram;

[0086] Figure 21D is Figure 21B The partial enlarged schematic diagram;

[0087] Figure 21E is Figure 1 The assembled cross-sectional schematic diagram of the powder metering wheel and the dose protection plate of the provided powder inhaler in yet another state;

[0088] Figure 21F is Figure 21E The partial enlarged schematic diagram;

[0089] Figure 22A Is Figure 1 Schematic structural view of the intake baffle of the inhalation trigger device of the provided powder inhaler at an angle;

[0090] Figure 22B Is Figure 21A Schematic structural view of the intake baffle at another angle provided;

[0091] Figure 22C Is Figure 22A Schematic structural view of the intake baffle at yet another angle provided;

[0092] Figure 23A Is Figure 1 Schematic structural view of the front housing of the provided powder inhaler at an angle;

[0093] Figure 23B Is Figure 1 Schematic structural view of the front housing of the provided powder inhaler at another angle;

[0094] Figure 24A Is Figure 18A Schematic structural view of the units digit wheel of the provided counting mechanism at an angle;

[0095] Figure 24B Is Figure 24A Schematic structural view of the units digit wheel at another angle provided;

[0096] Figure 25 Is Figure 18A Schematic structural view of the tens digit wheel of the provided counting mechanism;

[0097] Figure 26 Is the cross-sectional view of another embodiment of the powder inhaler provided by this application;

[0098] Figure 27 Is the cross-sectional view of yet another embodiment of the powder inhaler provided by this application;

[0099] Figure 28 Is Figure 1 Schematic cycle view of the process of opening the switch cover of the provided powder inhaler;

[0100] Figure 29A Is Figure 1 Schematic curve view of the opening angle and torque of one embodiment of the process of opening the cover of the provided powder inhaler;

[0101] Figure 29B Is Figure 1 Schematic curve view of the closing angle and torque of one embodiment of the process of closing the cover of the provided powder inhaler;

[0102] Figure 30A Is Figure 1Schematic diagram of the curve of the opening angle and torque in another embodiment of the opening process of the provided powder inhaler;

[0103] Figure 30B is Figure 1 Schematic diagram of the curve of the closing angle and torque in another embodiment of the closing process of the provided powder inhaler;

[0104] Figure 31A is Figure 1 Schematic diagram of the upward view structure of the provided powder inhaler at an angle;

[0105] Figure 31B is Figure 31A Schematic diagram of the provided powder inhaler in a state of being placed on a horizontal plane;

[0106] Figure 31C is Figure 31A Schematic diagram of the provided powder inhaler in a handheld state;

[0107] Figure 31D is Figure 31A Schematic diagram of the provided powder inhaler after opening the lid in a handheld state;

[0108] Figure 31E is Figure 31A Schematic diagram of the provided powder inhaler in a mouth-suction state. Detailed implementation manners

[0109] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0110] The terms "first", "second", and "third" in the embodiments of the present application are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0111] References herein to "embodiments" mean that particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they independent or alternative embodiments mutually exclusive of other embodiments. It will be clearly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0112] Refer to Figures 1 to 11 , Figure 1 FIG. Figure 1 is a schematic structural view of a powder inhaler provided by an embodiment of the present application in an unopened state. Figure 2 FIG. Figure 1 is a schematic structural view of the powder inhaler provided by Figure 3 FIG. Figure 1 in an opened state. Figure 4 FIG. Figure 3 is a schematic structural view of the powder inhaler provided by Figure 5A FIG. Figure 1 from another angle. Figure 5B FIG. Figure 5A is a schematic structural view of the outer cover of the powder inhaler provided by Figure 6A FIG. Figure 1 from another angle. Figure 6B FIG. Figure 1 is a schematic structural view of the powder inhaler provided by Figure 7A FIG. Figure 2 from another angle after removing the outer cover. Figure 7B FIG. Figure 7A is a partially enlarged schematic view of the powder inhaler provided by Figure 8A FIG. Figure 1 is a schematic structural view of the powder inhaler after removing the outer cover provided by Figure 8B FIG. Figure 8A is a partially enlarged schematic view of the powder inhaler provided by Figure 9A FIG. Figure 1 is a cross-sectional schematic view of the powder inhaler provided by Figure 9B FIG. Figure 1 in a certain state after removing the outer cover. Figure 9C FIG. Figure 1 is a cross-sectional schematic view of the powder inhaler provided by Figure 9D FIG. Figure 1 in another state after removing the outer cover from another angle. Figure 9E FIG. Figure 9CPartial enlarged schematic view of area A Figure 9F is Figure 9D Partial enlarged schematic view of area A Figure 9G is Figure 9C Partial enlarged schematic view of area B Figure 9H is Figure 1 Schematic structural view of the L-shaped air inlet channel of the powder inhaler provided Figure 10A is Figure 1 Schematic structural view of the driving cam of the powder inhaler provided at an angle Figure 10B is Figure 10A Schematic structural view of the driving cam provided at another angle Figure 10C is the schematic structural view of the driving cam provided by 10A at yet another angle Figure 11 is Figure 1 Schematic structural view of the airbag pressing part of the powder inhaler provided

[0113] See Figures 1 to 4 , this application provides a powder inhaler, which includes a housing assembly (not labeled in the figure), a functional mechanism ( Figures 1 - 4 not shown) and an outer cover 4; wherein, the functional mechanism is arranged in the housing assembly, the outer cover 4 is connected to the housing assembly, and can be limited to rotate back and forth between a first position and a second position. When the outer cover 4 is in the first position, the outer cover 4 is in a closed state. When the outer cover 4 is in the second position, the outer cover 4 is in an open position in place. Among them, the outer cover 4 is linked and cooperated with the functional mechanism. Through the back-and-forth rotation of the outer cover 4 between the first position and the second position, the linkage actions of each functional mechanism are realized, so that the powder inhaler realizes the powder distribution function such as medicinal powder. The back-and-forth rotation in this application refers to rotating back and forth along a repeated path, and the directions of the two rotations 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.

[0114] Specifically, the housing assembly includes a front housing 1, a rear housing 2 and an upper housing 3. Among them, the front housing 1, the rear housing 2 and the upper housing 3 are connected and cooperated with each other to form a containing space. The functional mechanism is arranged in the containing space. The outer cover 4 is rotatably connected to the bottom end of the housing assembly, so that it can rotate back and forth between the first position and the second position to realize the opening process and the closing process. The rotation connection mode between the outer cover 4 and the bottom end of the housing assembly can be rotation connection through a rotating shaft, or rotation connection through an arc-shaped slide rail. The shapes and structures of the front housing 1, the rear housing 2, the upper housing 3 and the outer cover 4 are not limited, and the materials can be metal or plastic, etc.

[0115] See Figure 1 , Figures 5A to 9B, the outer cover 4 includes two connecting portions 406 disposed opposite to each other in the first direction. The two connecting portions 406 are respectively rotatably connected to opposite sides of the bottom end of the housing assembly and protrude from the bottom end of the housing assembly. Specifically, the two connecting portions 406 of the outer cover 4 are assembled and connected to the housing assembly by a shaft and hole matching manner. Refer to Figure 5A , Figure 5B , Figure 6A and Figure 8A and Figure 8B , Figure 9A and Figure 9B , the powder inhaler further includes a driving gear 5. The driving gear 5 is disposed inside the housing assembly. A driving shaft 501 is provided on one end surface of the driving gear 5. A first shaft hole 401 and a driving hole 402 are provided on one of the connecting portions 406 of the outer cover 4. A second shaft hole 404 is provided on the other connecting portion 406 of the outer cover 4. Cylinders 105 are respectively provided on the front housing 1 corresponding to the first shaft hole 401 and the second shaft hole 404. The cylinders 105 are defined as the first cylinders. The first shaft hole 401 and the second shaft hole 404 of the outer cover 4 are matched with the corresponding cylinders 105 of the front housing 1. The driving hole 402 of the outer cover 4 is matched with the driving shaft 501 of the driving gear 5, so that the outer cover 4 is rotatably connected to the bottom end of the housing assembly.

[0116] As Figure 6B shown, the powder inhaler further includes a sealing ring 6. The sealing ring 6 is disposed between the connecting portion 406 of the outer cover 4 and the driving gear 5 for sealing, so as to ensure the consistency of the air passage and the consistency of the suction resistance of the powder inhaler, and prevent gas from entering the housing assembly between the driving gear 5 and the connecting portion 406 of the outer cover 4.

[0117] Refer to Figure 5A , Figure 6A and Figure 7A and Figure 7B, an arc-shaped rib 405 is further provided on one of the connecting portions 406 of the outer cover 4, and a sound-making elastic arm 108 is provided on the front housing 1. The arc-shaped rib 405 on the outer cover 4 is used to cooperate with the sound-making elastic arm 108 on the front housing 1 to achieve a sound prompt for the cover opening in place when the outer cover 4 rotates from the first position to the second position. Specifically, during the process of opening the outer cover 4, that is, during the process of the outer cover 4 rotating from the first position to the second position, the sound-making elastic arm 108 is located outside the arc-shaped rib 405, and the sound-making elastic arm 108 moves along the outer circumference of the arc-shaped rib 405. After the outer cover 4 is opened in place, that is, when it rotates to the second position, the sound-making elastic arm 108 cooperates with the arc-shaped rib 405 to achieve a sound prompt for the cover opening in place. During the process of closing the outer cover 4, that is, during the process of the outer cover 4 rotating back to the first position from the second position, the outer cover 4 is located inside the arc-shaped rib 405, and the outer cover 4 moves along the inner circumference of the arc-shaped rib 405. After the outer cover 4 is closed in place, that is, when it rotates to the first position, the sound-making elastic arm 108 cooperates with the arc-shaped rib 405 to achieve a sound prompt for the cover closing in place. For example, in a preferred embodiment, the angle of the outer cover 4 in the first position is defined as 0 degrees, and the angle of the outer cover 4 in the second position relative to the first position is 150 degrees; during the process of opening the cover, when the outer cover 4 rotates from 0 degrees to 150 degrees, that is, when the rotation angle of the outer cover 4 is 150 degrees, the arc-shaped rib 405 of the outer cover 4 contacts the sound-making elastic arm 108 of the front housing 1 to achieve the function of a sound prompt for the cover opening in place. The angle of the outer cover 4 in the second position is not limited to 150 degrees and can be designed as needed. For example, it can be greater than or equal to 120 degrees and less than or equal to 180 degrees, as long as the nozzle 101 can be exposed when the outer cover 4 is in the second position.

[0118] See Figure 6A and Figures 12A to 13B , the powder inhaler has an inhalation channel 706 and a nozzle 101. The nozzle 101 is communicated with the inhalation channel 706 to facilitate the user to inhale the medicinal powder from the outlet 102 position of the nozzle 101. Specifically, the housing assembly includes a nozzle 101. The nozzle 101 is provided on the front housing 1 and sleeved on the inhalation channel 706. When the outer cover 4 is configured in the first position, the outer cover 4 blocks the outlet 102 of the nozzle 101. When the outer cover 4 is configured in the second position, the outlet 102 of the nozzle 101 is exposed.

[0119] Specifically, such as Figure 5AAs shown, two drive holes 402 are provided on the connecting portion 406 of the outer cover 4. The two drive holes 402 are respectively arranged on both sides of the first shaft hole 401. Two drive shafts 501 are provided on one end face of the drive gear 5. The two drive shafts 501 are respectively arranged on both sides of the cylinder 105 of the front housing 1. The two drive holes 402 are in one-to-one correspondence and mating connection with the two drive shafts 501. In other embodiments, the drive holes 402 and the drive shafts 501 can also be correspondingly arranged in other numbers such as one or three. It can be understood that the connection between the outer cover 4 and the drive gear 5 is not limited to the above manner, and they can also be integrally formed, glued or welded, as long as the rotation of the outer cover 4 can drive the drive gear 5 to rotate.

[0120] As Figure 9A shown, the powder inhaler further includes an intermediate gear 13. The intermediate gear 13 is arranged inside the housing assembly, and the intermediate gear 13 meshes with the drive gear 5. Through the mating connection between the outer cover 4 and the drive gear 5, the linkage of the outer cover 4 driving the drive gear 5 and the functional mechanism is realized. Specifically, the outer cover 4 rotates around the cylinder 105 of the front housing 1. The drive holes 402 of the outer cover 4 drive the drive gear 5 to rotate synchronously, and then drive the linkage of each functional mechanism through the intermediate gear 13.

[0121] The functional mechanism includes a gas compression mechanism, a powder delivery mechanism, an inhalation trigger mechanism, a counting mechanism, etc. Through the rotation during the opening process of the outer cover 4, it drives the gas compression mechanism to realize the gas compression function respectively, and drives the powder delivery mechanism to realize the powder delivery function after the gas compression is completed, so as to deliver powders such as medicinal powders to the position of the inhalation channel 706 of the powder inhaler, and realize the inhalation trigger function through the inhalation trigger mechanism, so as to facilitate the user to inhale the medicinal powder. Further, when the outer cover 4 is closed, it drives the gas compression mechanism, the powder delivery mechanism and the inhalation trigger mechanism to reset, and drives the counting mechanism to count.

[0122] The following introduces each functional mechanism.

[0123] (1) Gas compression mechanism

[0124] Refer to Figures 12A to 14B , Figure 12A which is Figure 1 a schematic structural diagram of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided when it is in the third position in the powder container, Figure 12B which is Figure 1 a schematic structural diagram of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided when it is in the fourth position in the powder container, Figure 13A which is Figure 1 a schematic structural diagram of the powder container of the powder inhaler provided at an angle, Figure 13B which is Figure 13A a schematic structural diagram of the powder container provided at another angle, Figure 14A which is Figure 1Schematic structural diagram of the powder metering wheel of the provided powder inhaler at an angle Figure 14B It is a schematic structural diagram of the powder metering wheel provided by 14A at another angle

[0125] See Figures 5A to 14B , specifically, the air compression mechanism includes an airbag pressing member 17, an air compression airbag 18, an elastic member 19 and a driving cam 12. To facilitate understanding of the function of the air compression mechanism, the powder delivery mechanism is introduced here. The powder delivery mechanism includes a powder container 7 and a powder metering wheel 9. The powder metering wheel 9 has a dose cup 902. The powder container 7 has a storage cavity 715 for storing powder. One end of the elastic member 19 acts on the airbag pressing member 17. The airbag pressing member 17 is used to squeeze the air compression airbag 18 under the drive of the elastic member 19, so that the air compression airbag 18 is compressed to achieve the air compression function; the airbag pressing member 17 is also used to squeeze the elastic member 19 under the action of the driving cam 12 and drive the air compression airbag 18 to stretch

[0126] See Figures 12A to 13B , specifically, the first end of the storage cavity 715 has a powder outlet 713, and the second end has an air compression port 714. The air compression airbag 18 is arranged at the second end of the storage cavity 715 and communicates with the air compression port 714. Specifically, the outer side surface of the second end of the storage cavity 715 has an annular rib 701. One end of the air compression airbag 18 close to the powder container 7 is engaged with the annular rib 701 of the powder container 7 to realize the connection between the air compression airbag 18 and the powder container 7. The airbag pressing member 17 is movably sleeved outside the air compression airbag 18 and the storage cavity 715. The elastic member 19 can be an elastic structural member such as a spring. The airbag pressing member 17 is used to squeeze the air compression airbag 18 under the drive of the elastic member 19. Among them, the airbag pressing member 17 can move back and forth between a fifth position and a sixth position, so that the air compression airbag 18 compresses air into the storage cavity 715 to achieve the air compression function, facilitating the extrusion of the powder in the storage cavity 715 from the powder outlet 713 into the dose cup 902 of the powder metering wheel 9

[0127] As Figure 9A , Figure 9B , Figure 11 , Figure 13A and Figure 13B shown, the top wall of the airbag pressing member 17 has a fixing hole 1701 for connecting the top of the air compression airbag 18. For example, the top of the air compression airbag 18 can pass through the fixing hole 1701, and a part of the air compression airbag 18 is limited outside the top wall of the airbag pressing member 17, and another part is limited on the side of the top wall of the airbag pressing member 17 close to the air compression port 714, so as to drive the air compression airbag 18 to expand and contract in cooperation with the movement of the airbag pressing member 17 and the elastic member 19. Driving the air compression airbag 18 to expand and contract through the airbag pressing member 17 can improve the air compression efficiency of the air compression airbag 18 and prevent the air compression airbag 18 from malfunctioning due to the inability to reset

[0128] The powder inhaler further comprises a driving cam 12, which is disposed in the housing assembly. Figure 9A The powder inhaler also includes a gear bracket 14, which is arranged in the housing assembly, and a driving cam 12 is assembled on the gear bracket 14, one end of the gear bracket 14 is assembled and connected with the powder metering wheel 9, and the other end is assembled and connected with the driving cam 12. The outer cover 4 drives the driving gear 5 to move in conjunction, the driving gear 5 is meshed with the intermediate gear 13, and the intermediate gear 13 is meshed with the driving cam 12, so that the driving cam 12 and the driving gear 5 rotate in the same direction. It can be understood that the present application can also omit the driving gear 5 and / or the intermediate gear 13, as long as the cam 12 can be driven to rotate by rotating the outer cover 4. The driving cam 12 and the elastic member 19 are used to drive the air bag pressing member 17 to move back and forth between the fifth position and the sixth position, thereby driving the compressed air bag 18 to expand and contract, so as to realize the compressed air and reset functions. Specifically, the elastic member 19 is arranged on one side of the top wall of the airbag pressure piece 17, one end of the elastic member 19 abuts against the top wall of the airbag pressure piece 17, and the other end abuts against the top wall of the upper shell 3 to drive the airbag pressure piece 17 to move; the driving cam 12 rotates to make way for the airbag pressure piece 17, and the elastic member 19 drives the airbag pressure piece 17 to move from the fifth position to the sixth position; the driving cam 12 squeezes the airbag pressure piece 17, and the airbag pressure piece 17 resets and moves from the sixth position to the fifth position and squeezes the elastic member 19.

[0129] See also Figures 10A to 11 , the end of the side wall of the airbag pressing piece 17 away from the top wall has a convex rod 1704, the end of the convex rod 1704 away from the top wall of the airbag pressing piece 17 has an arc surface 1703, the driving cam 12 has a cam curved surface 1202, and the arc surface 1703 is used to cooperate with the cam curved surface 1202 of the driving cam 12 to realize the reciprocating movement of the airbag pressing piece 17 between the fifth position and the sixth position. Specifically, when the airbag pressing piece 17 is in the fifth position, the arc surface 1703 of the convex rod 1704 of the airbag pressing piece 17 abuts against the side of the driving cam 12, and the arc surface 1703 of the airbag pressing piece 17 is limited in the arc groove 1201 of the driving cam 12. At this time, the top wall of the airbag pressing piece 17 compresses the elastic member 19 to make it in a compressed state, and the top wall of the airbag pressing piece 17 stretches the compressed airbag 18 to make it in an extended state. During the opening process of the outer cover 4, the driving cam 12 is driven to rotate, the elastic member 19 is continuously stretched, and the elastic force of the elastic member 19 drives the airbag pressure member 17 to move vertically downward, that is, the elastic member 19 drives the airbag pressure member 17 to move from the fifth position to the sixth position, and the arc surface 1703 of the airbag pressure member 17 moves along the cam surface 1202 of the driving cam 12. The airbag pressure member 17 moves downward to compress the compressed airbag 18 and pressurize air into the storage chamber 715.

[0130] In one embodiment, the tooth number ratio between the driving gear 5 and the driving cam 12 is 18:15. That is, when the outer cover 4 is opened by 150°, the driving gear 5 rotates synchronously by 150°. At this time, the rotation angle of the driving cam 12 is 180°. It can be understood that setting the tooth number ratio between the driving gear 5 and the driving cam 12 to 18:15 can reduce the volume of the driving gear 5 and save space. In other embodiments, the powder inhaler may not be provided with the driving gear 5 and the intermediate gear 13, and the outer cover 4 is directly linked with the driving cam 12. The rotation of the outer cover 4 drives the rotation of the driving cam 12, thereby realizing the linkage of the functional mechanism.

[0131] Specifically, as Figures 9A to 11 shown, the driving cam 12 includes a body portion 1200 and a gear 1203. The gear 1203 is coaxially connected to the body portion 1200 and is used to drive the rotation of the body portion 1200. The gear 1203 meshes with the intermediate gear 13. Among them, one surface of the body portion 1200 has a guiding groove 1209. The side surface of the guiding groove 1209 is a cam surface 1202. The cam surface 1202 cooperates with the arc surface 1703 of the airbag pressing member 17 to realize the reciprocating movement of the airbag pressing member 17 between the fifth position and the sixth position. Specifically, the driving cam 12 has a central hole 1204, which is defined as the first central hole. The gear 1203 is arranged on one surface of the body portion 1200 and surrounds the central hole 1204. The central hole 1204 penetrates through the body portion 1200 and the gear 1203. The central hole 1204 of the driving cam 12 is sleeved on the gear bracket 14 of the powder inhaler. The guiding groove 1209 is located on the surface of the body portion 1200 facing the gear 1203, and the guiding groove 1209 is spaced from the gear 1203. The airbag pressing member 17 moves up and down along the longitudinal direction between the fifth position and the sixth position. In this application, the cam surface 1202 of the driving cam 12 directly abuts against the convex rod 1704 of the airbag pressing member 17, which simplifies the structure of the air pressure mechanism and improves the stability of the operation of the air pressure mechanism. In one embodiment, the air pressure mechanism only includes four independent components: the airbag pressing member 17, the air pressure airbag 18, the elastic member 19 and the driving cam 12, making the air pressure mechanism simple in structure.

[0132] In some embodiments, the end of the convex rod 1704 of the airbag pressing member 17 away from the top wall has a tip, and the end surface of the tip is an arc surface 1703. The outer peripheral side surface of the body portion 1200 of the driving cam 12 has an arc-shaped groove 1201. When the airbag pressing member 17 is configured in the fifth position, the tip of the convex rod 1704 is embedded in the arc-shaped groove 1201 of the body portion 1200 to realize the initial positioning and preliminary limiting of the airbag pressing member 17.

[0133] In a specific embodiment, the arc-shaped groove 1201 is a circular arc-shaped groove, the bottom surface of the arc-shaped groove 1201 is circular arc-shaped, and the arc surface 1703 of the convex rod 1704 is a circular arc surface. It can be understood that the arc-shaped groove 1201 is provided on the cam surface 1202 of the driving cam 12, and the arc surface 1703 of the convex rod 1704 is embedded in the arc-shaped groove 1201 to perform initial positioning and preliminary limiting on the airbag pressing member 17, so that the movement of the air compression mechanism needs to overcome the resistance of the upward movement of the arc surface 1703 of the airbag pressing member 17 to break away from the arc-shaped groove 1201, which can effectively prevent the mis-triggering of the air compression mechanism.

[0134] In a specific embodiment, the bottom surface of the arc-shaped groove 1201 is circular arc-shaped, and the arc surface 1703 of the convex rod 1704 is a circular arc surface. During the process of the arc surface 1703 of the convex rod 1704 moving from one side of the bottom surface of the arc-shaped groove 1201 to the other side, the convex rod 1704 remains stationary and the outer cover 4 rotates in an idle stroke.

[0135] Further, referring to Figures 9A to 13B , the side wall of the storage cavity 715 of the powder container 7 has a ventilation hole 709, and the side wall of the airbag pressing member 17 has a pressure relief hole 1702. As shown in Figure 9C and Figure 9E , when the airbag pressing member 17 is configured at the fifth position, the side wall of the airbag pressing member 17 blocks the ventilation hole 709, and the ventilation hole 709 is not communicated with the pressure relief hole 1702; as shown in Figure 9D and Figure 9F , when the airbag pressing member 17 is configured at the sixth position, the pressure relief hole 1702 is communicated with the ventilation hole 709. During the process of the airbag pressing member 17 moving from the fifth position to the sixth position, first, the air compression airbag 18 is used to compress air into the storage cavity 715, so as to fill and compact the powder in the storage cavity 715 into the dose cup 902 of the powder metering wheel 9 through the powder outlet 713, which is convenient for improving the consistency of powder filling. After the pressure relief hole 1702 is communicated with the ventilation hole 709, the storage cavity 715 is depressurized to release the pressure in the storage cavity 715 of the powder container 7 to normal pressure, so as to avoid excessive pressure in the storage cavity 715 due to non-depressurization in the storage cavity 715 during the subsequent powder delivery process, and further avoid powder leakage from the gap when the powder metering wheel 9 of the powder delivery mechanism rotates, reducing powder waste. That is, during the process of the airbag pressing member 17 moving from the fifth position to the sixth position, the air compression process is first performed, and then the pressure relief process is performed. The pressure relief process is performed in the later stage of the downward stroke of the airbag pressing member 17. Since the pressure relief process of the storage cavity 715 in the present application is completed before the powder metering wheel 9 rotates from the third position to the fourth position, therefore, after the powder metering wheel 9 starts to rotate from the third position to the fourth position, less powder will leak from the powder outlet 713 under the air pressure.

[0136] Specifically, referring to Figure 9Cand Figure 9D In some embodiments, a filter membrane 25 is provided at the second end of the storage chamber 715. The filter membrane 25 is located at the air compression port 714 and is spaced from the port of the air compression port 714, isolating the space of the air compression airbag 18 from the internal space of the storage chamber 715. Among them, the filter membrane 25 can be a waterproof and breathable membrane, which can filter impurities in powders such as medicinal powders and can also filter water vapor, etc., to prevent the powders in the storage chamber 715 from getting damp. The ventilation hole 709 is provided on the side wall of the storage chamber 715. One end of the ventilation hole 709 communicates with the space between the filter membrane 25 and the air compression airbag 18, that is, the ventilation hole 709 is not directly communicated with the inside of the storage chamber 715 and is relatively independent of the inside of the storage chamber 715. After the ventilation hole 709 is communicated with the pressure relief hole 1702, the gas in the space between the filter membrane 25 and the air compression airbag 18 can be discharged after passing through the ventilation hole 709 and the pressure relief hole 1702 in sequence, so as to relieve the pressure of the space between the filter membrane 25 and the air compression airbag 18. At the same time, since the filter membrane 25 is a breathable membrane, the gas in the storage chamber 715 can also enter the space between the filter membrane 25 and the air compression airbag 18 through the filter membrane 25 and then leak out through the ventilation hole 709 to relieve the pressure of the storage chamber 715, preventing the ventilation hole 709 from being directly communicated with the inside of the storage chamber 715, and the gas in the storage chamber 715 directly leaks from the ventilation hole 709 during the pressure relief process, resulting in the flying or leakage of the medicinal powders in the storage chamber 715. During the stretching process of the air compression airbag 18, that is, during the air intake process of the air compression airbag 18, external gas enters the space between the filter membrane 25 and the air compression airbag 18 through the ventilation hole 709 and then enters the storage chamber 715 through the filter membrane 25, preventing the ventilation hole 709 from being directly communicated with the inside of the storage chamber 715, and external gas directly enters the storage chamber 715 through the ventilation hole 709 during the air intake process of the air compression airbag 18, bringing external water molecules into the storage chamber 715, resulting in the flying or dampening of the medicinal powders in the storage chamber 715 and causing waste. In addition, the filter membrane 25 can also prevent the medicinal powder from entering the air compression airbag 18 from the storage chamber 715, thus preventing the problem of waste of medicinal powder from occurring.

[0137] See Figure 13A As shown in Figure 13A , a receiving cavity 702 is further provided on the side wall of the storage chamber 715 of the powder container 7. The receiving cavity 702 is used to store a desiccant. The storage chamber 715 and the receiving cavity 702 have a common side wall, and the common side wall can be made of a water-permeable material, so that the desiccant in the receiving cavity 702 can absorb the water vapor in the storage chamber 715 and prevent the powders in the storage chamber 715 from getting damp.

[0138] In a preferred embodiment, during the movement of the airbag pressing member 17 from the fifth position to the sixth position, the downward pressing stroke of the airbag pressing member 17 is in the range of 2 mm - 6 mm. For example, in a specific embodiment, the downward pressing stroke of the airbag pressing member 17 is 3.5 mm. Among them, the first 3 mm of the downward pressing stroke is the air compression stroke, and the last 0.5 mm of the downward pressing stroke is the pressure relief stroke. When the downward pressing stroke of the airbag pressing member 17 reaches 3 mm, the pressure relief hole 1702 and the ventilation hole 709 are at the critical point of connection. When the downward pressing stroke of the airbag pressing member 17 is between 3 mm - 3.5 mm, the pressure relief hole 1702 and the ventilation hole 709 are connected to achieve pressure relief. The angle of the outer cover 4 when it is in the first position is defined as 0 degrees, and the angle of the outer cover 4 when it is in the second position is 150 degrees. When the downward pressing stroke of the airbag pressing member 17 of the air compression mechanism is 3.5 mm, that is, when the airbag pressing member 17 is in the sixth position, the angle of the outer cover 4 is 62.5 degrees, and the rotation angle of the driving gear 5 driven is 62.5 degrees, and the corresponding rotation angle of the driving cam 12 is 75 degrees.

[0139] More preferably, during the process of opening the cover, when the rotation angle of the outer cover 4 is 55 degrees, the downward pressing stroke of the airbag pressing member 17 reaches 3 mm, and the air compression mechanism completes the process of compressing and discharging the powder in the powder container 7, that is, the air compression process. When the rotation angle of the outer cover 4 is 62.5 degrees, the pressure relief process is completed, and the compressed gas in the powder container 7 is released to normal pressure, avoiding powder leakage when the powder metering wheel 9 rotates. It can be understood that the selection of the above angles is only an example, and other angle ranges can also be selected.

[0140] See Figures 10A to 10C , in some embodiments, the cam surface 1202 includes a first curved surface segment 1211 and a second curved surface segment 1212 connected to each other. The second curved surface segment 1212 is located at one end of the first curved surface segment 1211 away from the arc-shaped groove 1201. Among them, the first curved surface segment 1211 is a non-circular arc surface, the second curved surface segment 1212 is a circular arc surface, and the second curved surface segment 1212 is concentrically arranged with the outer peripheral side surface of the body portion 1200.

[0141] It can be understood that by setting the first curved surface segment 1211 as a non-circular arc surface, during the process of closing the cover of the outer cover 4 of the powder inhaler, the driving cam 12 rotates in the reverse direction, and the rotation of the first curved surface segment 1211 drives the airbag pressing member 17 to reset from the sixth position to the fifth position. Specifically, during the process of the airbag pressing member 17 resetting from the sixth position to the fifth position, the arc surface 1703 of the convex rod 1704 of the airbag pressing member 17 abuts against the first curved surface segment 1211. Since the first curved surface segment 1211 is a non-circular arc surface, the reverse rotation of the first curved surface segment 1211 pushes the convex rod 1704 of the airbag pressing member 17 to move upward continuously, thereby realizing the reset of the airbag pressing member 17.

[0142] Preferably, the first curved surface segment 1211 includes a first arc surface segment 1214, a plane segment 1215, and a second arc surface segment 1216 that are connected to each other. The plane segment 1215 is located between the first arc surface segment 1214 and the second arc surface segment 1216, and the plane segment 1215 is located at one end of the first arc surface segment 1214 away from the arc-shaped groove 1201. During the process of opening the outer cover 4, when the airbag pressing member 17 moves from the fifth position to the sixth position, first, it is necessary to overcome the resistance of the side wall of the arc-shaped groove 1201 near the first arc surface segment 1214 to the arc surface 1703 of the convex rod 1704, so that the tip of the convex rod 1704 disengages from the arc-shaped groove 1201. This process is the empty stroke of opening the cover and requires a relatively large torque to prevent accidental opening of the cover.

[0143] In an embodiment, the angle of the outer cover 4 at the first position is defined as 0 degrees, the angle of the outer cover 4 at the second position is 150 degrees, and the process of the outer cover 4 rotating from 0 degrees to 12 degrees is the empty stroke of opening the cover. Among them, the process of the outer cover 4 rotating from 0 degrees to 8 degrees is the first empty stroke of opening the cover, and the process of the outer cover 4 rotating from 8 degrees to 12 degrees is the second empty stroke of opening the cover. During the first empty stroke of opening the cover, the outer cover 4 rotates so that the arc surface 1703 of the tip of the convex rod 1704 abuts against the end of the arc-shaped groove 1201 away from the first arc surface segment 1214 and then abuts against the end of the arc-shaped groove 1201 near the first arc surface segment 1214, that is, the arc surface 1703 of the tip of the convex rod 1704 slides across the bottom surface of the arc-shaped groove 1201. Preferably, the torque during this process is 0.05 N·m, which can effectively prevent accidental opening of the cover due to non-human factors. During the second empty stroke of opening the cover, the outer cover 4 rotates to make the arc surface 1703 of the tip of the convex rod 1704 abut against the first arc surface segment 1214 from abutting against the end of the arc-shaped groove 1201 near the first arc surface segment 1214, that is, it is necessary to disengage the arc surface 1703 of the tip of the convex rod 1704 from the arc-shaped groove 1201, which requires a larger torque compared to the first empty stroke of opening the cover. Preferably, the torque during the second empty stroke of opening the cover is 0.15 N·m. Setting a greater resistance to opening the cover can more effectively prevent accidental opening of the cover.

[0144] During the process of opening the outer cover 4, when the outer cover 4 rotates to 12 degrees, the arc surface 1703 of the tip of the convex rod 1704 of the airbag pressing member 17 disengages from the arc-shaped groove 1201 and abuts against the first arc surface segment 1214, and the empty stroke of opening the outer cover 4 is completed. After that, during the process of the outer cover 4 rotating from 12 degrees to 62.5 degrees, the air pressure mechanism performs the air pressure process and the pressure relief process, and at this time, the outer cover 4 performs the first load stroke of opening the cover.

[0145] When the outer cover 4 rotates to 12 degrees, the arc surface 1703 at the tip of the convex rod 1704 has disengaged from the arc-shaped groove 1201. The outer cover 4 will instantaneously open and rotate from 12 degrees to 55 degrees instantaneously, driving the drive cam 12 to rotate to 66 degrees instantaneously. At this time, the convex rod 1704 of the airbag pressing member 17 will also move downward instantaneously. The arc surface 1703 at the tip of the convex rod 1704 instantaneously moves to abut against one end of the plane section 1215 close to the second arc surface section 1216. The downward stroke of the convex rod 1704 of the airbag pressing member 17 reaches 3 mm, and the air compression mechanism realizes the function of instantaneous air compression. When the outer cover 4 rotates to 55 degrees, the pressure relief hole 1702 and the ventilation hole 709 are at the communication critical point. During the process of the outer cover 4 rotating from 55 degrees to 62.5 degrees, the drive cam 12 rotates from 66 degrees to 75 degrees. The tip of the convex rod 1704 of the airbag pressing member 17 abuts from one end of the second arc surface section 1216 close to the plane section 1215 to abut against one end of the second arc surface section 1216 far from the plane section 1215. That is, the tip of the convex rod 1704 slides over the second arc surface section 1216. During this process, the downward stroke of the convex rod 1704 of the airbag pressing member 17 is between 3 mm and 3.5 mm, and the pressure relief hole 1702 and the ventilation hole 709 are communicated to realize pressure relief. The torque of the outer cover 4 is constant within the first lid-opening load stroke. Preferably, the torque of the outer cover 4 within the first lid-opening load stroke is 0 N·m. That is, the torque during the process of the outer cover 4 rotating from 12 degrees to 62.5 degrees is 0 N·m, which is beneficial for the outer cover 4 to open instantaneously, enabling the air compression mechanism to compress air rapidly and instantaneously, and improving the air compression effect.

[0146] When the outer cover 4 rotates to 62.5 degrees, the arc surface 1703 at the tip of the convex rod 1704 of the airbag pressing member 17 is at the critical point between the first curved surface section 1211 and the second curved surface section 1212. When the outer cover 4 continues to rotate from 62.5 degrees to 150 degrees, the drive cam 12 rotates from 75 degrees to 180 degrees. The arc surface 1703 of the convex rod 1704 of the airbag pressing member 17 abuts from one end of the second curved surface section 1212 close to the first curved surface section 1211 to abut against one end of the second curved surface section 1212 far from the first curved surface section 1211. Since the second curved surface section 1212 is an arc surface and the second curved surface section 1212 is concentric with the outer peripheral side surface of the body portion 1200 and the pitch circle of the gear 1203, during the process of the outer cover 4 rotating from 62.5 degrees to 150 degrees, the convex rod 1704 of the airbag pressing member 17 still remains at the sixth position, that is, at 3.5 mm, and the convex rod 1704 of the airbag pressing member 17 does not move.

[0147] See Figures 1 to 11, a stop groove 1213 is provided at one end of the second curved surface section 1212 of the driving cam 12 away from the first curved surface section 1211. After the outer cover 4 is opened to the in-place position, the tip of the convex rod 1704 of the airbag pressing member 17 is located in the stop groove 1213, and the gravity of the airbag pressing member 17 acts on the driving cam 12, so that the tip of the convex rod 1704 of the airbag pressing member 17 limits the driving cam 12, preventing the driving cam 12 from rotating reversely under the action of the reset torsion spring 15 (such as Figure 17A ) after the user releases the hand after the outer cover is opened to the in-place position, resulting in the problem that the outer cover automatically closes after being opened to the in-place position. In a specific embodiment, the stop groove 1213 is an arc-shaped groove, and the bottom surface of the stop groove 1213 is arc-shaped, so as to facilitate better cooperation between the tip of the convex rod 1704 and the stop groove 1213.

[0148] (2) Powder delivery mechanism

[0149] Refer to Figures 12A to 14B , the powder delivery mechanism includes a powder container 7 and a powder metering wheel 9, and the powder metering wheel 9 of the powder delivery mechanism is rotatably connected to the powder container 7. Specifically, the powder container 7 has a storage cavity 715, an inhalation channel 706, and a first cylindrical groove 716. The powder metering wheel 9 is installed in the first cylindrical groove 716, and the powder metering wheel 9 can rotate back and forth between a third position and a fourth position. When in the third position, the dosing cup 902 of the powder metering wheel 9 is in the powder filling position, and when in the fourth position, the dosing cup 902 of the powder metering wheel 9 is in the powder inhalation position, that is, the position corresponding to the inhalation channel 706. It should be noted that the powder metering wheel 9 of the present application rotates back and forth between the third position and the fourth position, and its back-and-forth rotation path is along the minor arc, that is, the rotation direction of the powder metering wheel 9 from the third position to the fourth position is opposite to the rotation direction from the fourth position to the third position, and it does not rotate one full circle along the inner circumference of the first cylindrical groove 716 to achieve the back-and-forth rotation between the third position and the fourth position. By rotating the powder metering wheel 9 back and forth between the third position and the fourth position along the minor arc, the movement path of the powder metering wheel 9 can be made the shortest, and it can move along the optimal path, so as to more effectively avoid the waste and loss of the powder in the dosing cup 902 during the movement of the powder metering wheel 9.

[0150] The powder metering wheel 9 includes a dosing cup 902. When the powder metering wheel 9 is configured in the third position, the dosing cup 902 is correspondingly arranged with the powder outlet 713 of the storage cavity 715 for receiving the powder from the powder container 7. When the powder metering wheel 9 is configured in the fourth position, the dosing cup 902 is correspondingly arranged with the inlet 704 of the inhalation channel 706. Specifically, during the process of the airbag pressing member 17 moving from the fifth position to the sixth position, the powder metering wheel 9 is in the third position. The airbag pressing member 17 acts on the air compression airbag 18 under the drive of the elastic member 19, and compacts and fills the powder in the storage cavity 715 into the dosing cup 902 of the powder metering wheel 9.

[0151] See Figure 13A , 14A and 14B. Specifically, the powder metering wheel 9 is installed in the first cylindrical groove 716. The powder metering wheel 9 has an outer arc surface 901, and the outer arc surface 901 of the powder metering wheel 9 is attached to the inner arc surface 705 of the first cylindrical groove 716 of the powder container 7. Among them, the outer arc surface 901 of the powder metering wheel 9 is an arc toroidal surface covering the reciprocating stroke. The radian corresponding to the arc of the outer arc surface 901 is greater than or equal to 140 degrees and less than or equal to 170 degrees. Preferably, the radian corresponding to the arc of the outer arc surface 901 is about 150°.

[0152] See Figure 13A and Figure 14B , there is a cylinder 703 in the first cylindrical groove 716 of the powder container 7. The cylinder 703 is defined as the second cylinder. The powder metering wheel 9 has a central hole 906, and the central hole 906 is defined as the second central hole. The first end of the powder metering wheel 9 has a top-tightening spring arm 909, and the top-tightening spring arm 909 is defined as the first top-tightening spring arm. The top-tightening spring arm 909 is arranged around the central hole 906. The top-tightening spring arm 909 of the powder metering wheel 9 is cooperatively arranged with the cylinder 703 in the first cylindrical groove 716 of the powder container 7. Specifically, the cylinder 703 in the first cylindrical groove 716 is assembled in the central hole 906, the top-tightening spring arm 909 abuts against the cylinder 703 in the first cylindrical groove 716, and the inner diameter formed by the top-tightening spring arm 909 is smaller than the outer diameter of the cylinder 703. Thus, during assembly, the top-tightening spring arm 909 undergoes elastic deformation, and the elastic deformation of the top-tightening spring arm 909 of the powder metering wheel 9 provides a pressing force for the inner arc surface 705 of the first cylindrical groove 716 to be attached to the outer arc surface 901 of the powder metering wheel 9, improving the sealing reliability and enabling the powder metering wheel 9 to be more tightly assembled in the first cylindrical groove 716 of the powder container 7, facilitating a good assembly connection between the powder metering wheel 9 and the powder container 7.

[0153] The outer side surface of the powder metering wheel 9 is provided with a dose cup 902. Specifically, the dose cup 902 is arranged on the outer arc surface 901 of the powder metering wheel 9, and the dose cup 902 is used to hold powder. In a preferred embodiment, only one dose cup 902 is arranged on the outer arc surface 901 of the powder metering wheel 9. Only by the reciprocating rotation of the powder metering wheel 9 between the third position and the fourth position, a dose cup 902 is driven to reciprocate between the inlet 704 position of the inhalation channel 706 and the powder outlet 713 position to realize the filling and delivery of the powder, thereby facilitating the user's suction.

[0154] It can be understood that the amount of powder contained in a dose cup 902 is fixed, and the amount of powder entering the inhalation channel 706 during the user's suction is fixed, avoiding the possibility that when multiple dose cups 902 are arranged at intervals along the circumferential direction on the outer side surface of the cylindrical metering component, the metering component rotates to allow multiple doses to be continuously distributed into the inhalation channel 706, resulting in an excessive amount of powder such as medicinal powder; or, when a series of dose grooves or a dose groove is formed on the surface of the flat metering component, when the powder is delivered by a translation method, the position state of the suction use and the open position state of the outer cover 4 are inconsistent, resulting in the user inhaling multiple doses of powder in one inhalation, and further resulting in the problem of excessive powder inhalation by the user. That is, only one dose cup 902 is arranged on the outer arc surface 901 of the powder metering wheel 9, and the amount of powder inhaled by the user at the outlet 102 position of the mouthpiece 101 at one time is fixed, and there is no possibility of inhaling multiple doses of powder, which can accurately control the powder inhalation amount and simplify the structure.

[0155] In other embodiments, a dose cup 902 arranged on the outer arc surface 901 of the powder metering wheel 9 may also include multiple sub-dose cups. That is, at one position, a dose cup 902 can be divided into multiple spaced sub-dose cups. For example, one or more partitions can be arranged in the dose cup 902 to divide a dose cup 902 into multiple sub-dose cups; or, in other embodiments, multiple dose cups 902 can also be arranged at intervals on the outer arc surface 901 of the powder metering wheel 9, as long as it is ensured that at a fixed position, the powder capacity in the dose cup 902 is fixed to facilitate accurate control of the amount of powder inhaled by the user.

[0156] See Figure 14A, in an embodiment, a first powder scraping groove 903 is further provided on the outer arc surface 901 of the powder metering wheel 9. The first powder scraping groove 903 is a notch provided on the outer arc surface 901. Specifically, the first powder scraping groove 903 is inclined circumferentially with respect to the powder metering wheel 9. The first powder scraping groove 903 is used to scrape off and discharge the fine pharmaceutical powder adhering to the inner arc surface 705 of the powder container 7, so as to prevent the fine pharmaceutical powder on the inner arc surface 705 of the powder container 7 from blocking the movement of the powder metering wheel 9 and improve the smoothness of the movement of the powder metering wheel 9 in the first cylindrical groove 716 of the powder container 7. Preferably, the depth of the first powder scraping groove 903 is 0.2 mm - 0.4 mm.

[0157] In an embodiment, a second powder scraping groove 904 is further provided on the outer arc surface 901 of the powder metering wheel 9. The depth of the second powder scraping groove 904 is greater than that of the first powder scraping groove 903. Preferably, the depth of the second powder scraping groove 904 is 0.7 mm - 0.9 mm. The second powder scraping groove 904 is used to scrape off and discharge the large particle pharmaceutical powder adhering to the inner arc surface 705 of the powder container 7, so as to further improve the smoothness of the movement of the powder metering wheel 9 in the first cylindrical groove 716 of the powder container 7. In some embodiments, the width of the second powder scraping groove 904 can also be greater than that of the first powder scraping groove 903. Wherein, along the direction of the powder metering wheel 9 turning from the third position to the fourth position, the second powder scraping groove 904 is provided on the side of the first powder scraping groove 903 away from the dosing cup 902, which is convenient for scraping off and discharging the large particle pharmaceutical powder adhering to the inner arc surface 705 of the powder container 7 by the second powder scraping groove 904 during the process of the powder metering wheel 9 turning from the third position to the fourth position, that is, during the drug delivery stroke of the powder metering wheel 9, reducing the movement resistance of the large particle pharmaceutical powder to the powder metering wheel 9, and then scraping off and discharging the remaining fine pharmaceutical powder adhering to the inner arc surface 705 of the powder container 7 by the first powder scraping groove 903, so as to better ensure the smoothness of the movement of the powder metering wheel 9 in the first cylindrical groove 716 of the powder container 7. The sizes of the first powder scraping groove 903 and the second powder scraping groove 904 are different. During the drug delivery stroke and the reset stroke of the powder metering wheel 9, that is, during the process of the powder metering wheel 9 turning back from the fourth position to the third position, the first powder scraping groove 903 and the second powder scraping groove 904 can clean the pharmaceutical powder on the inner arc surface 705 of the powder container 7 multiple times and in multiple gradients, which can further improve the accuracy of the drug delivery dose.

[0158] In an embodiment, the end face of the first end of the powder metering wheel 9 has a first rib 908. The first rib 908 prevents friction between the plane and adjacent parts, and improves the smoothness of the reciprocating movement of the powder metering wheel 9 through the contact friction of the rib.

[0159] In one embodiment, the end face of the second end of the powder metering wheel 9 has a second rib 907. The second rib 907 prevents friction between the plane and adjacent parts, and improves the smoothness of the reciprocating motion of the powder metering wheel 9 through rib contact friction.

[0160] In one embodiment, the end face of the first end of the powder metering wheel 9 has a first rib 908, and the second end has a second rib 907.

[0161] In one embodiment, referring to Figure 14B , the first end of the powder metering wheel 9 further has a groove 911 and a driving spring arm 910. The groove 911 is disposed around the central hole 906. One end of the driving spring arm 910 is connected to the side wall of the groove 911, and the other end is a free end. The driving spring arm 910 and the pressing spring arm 909 are spaced apart. One end of the wedge-shaped column 1005 of the dose protection plate 10 extends into the groove 911. The driving spring arm 910 is used to abut against the wedge-shaped column 1005 of the dose protection plate 10 to drive the dose protection plate 10 to rotate and reset; arranging the groove 911 can also reduce the weight of the powder metering wheel 9, making it easier to drive the powder metering wheel 9 to rotate. The specific manner and process of the driving spring arm 910 driving the dose protection plate 10 to rotate and reset will be described in detail in the subsequent process of the outer cover 4 closing the cover to trigger the function mechanism to reset, and will not be elaborated here.

[0162] Referring to Figure 10B and Figure 14A , the surface of the body portion 1200 of the driving cam 12 facing away from the gear 1203 further has an annular boss 1207. The annular boss 1207 is coaxially arranged with the gear 1203 and is used to drive the powder metering wheel 9 to rotate. Specifically, the second end of the powder metering wheel 9 has a boss 905, which is defined as the first boss. The boss 905 of the powder metering wheel 9 is used to cooperate with the annular boss 1207 of the driving cam 12 to achieve rotational drive. Specifically, the two annular bosses 1207 are centrosymmetrically arranged with the center of the central hole 1204 as the center, and the two bosses 905 are centrosymmetrically arranged with the center of the central hole 906 as the center.

[0163] In a preferred embodiment, during the process of opening the cover, the angle of the outer cover 4 at the second position is 150 degrees. During the process of the outer cover 4 rotating from the first position (i.e., 0 degree) to the second position, wherein, during the process of the outer cover 4 rotating from 0 degree to 62.5 degrees (i.e., the outer cover 4 rotates by 62.5 degrees), the outer cover 4 drives the driving gear 5 to rotate, and further drives the driving cam 12 to rotate from 0 degree to 75 degrees (i.e., the driving cam 12 rotates by 75 degrees). During this process, the powder metering wheel 9 is in a static state, and the boss 905 of the powder metering wheel 9 does not contact the annular boss 1207 of the driving cam 12, and the powder metering wheel 9 does not rotate at the third position; during the process of the outer cover 4 rotating from 62.5 degrees to 150 degrees (i.e., the outer cover 4 rotates by 87.5 degrees), the outer cover 4 drives the driving gear 5 to rotate, and further drives the driving cam 12 to rotate from 75 degrees to 180 degrees (i.e., the driving cam 12 rotates by 105 degrees). During this process, the boss 905 of the powder metering wheel 9 is in contact with the annular boss 1207 of the driving cam 12. The annular boss 1207 of the driving cam 12 cooperates with the boss 905 of the powder metering wheel 9 to drive the powder metering wheel 9 to rotate from the third position to the fourth position. The powder metering wheel 9 rotates by 105 degrees during this process, that is, when the dosing cup 902 of the powder metering wheel 9 rotates from the position of the powder outlet 713 to the inlet 704 of the inhalation channel 706, the rotation angle of the powder metering wheel 9 is 105 degrees.

[0164] During the process of the outer cover 4 rotating from 62.5 degrees to 150 degrees, the driving cam 12 rotates from 75 degrees to 180 degrees, driving the powder metering wheel 9 to rotate from the third position to the fourth position, that is, the dosing cup 902 of the powder metering wheel 9 rotates from the position of the powder outlet 713 of the powder container 7 to the inlet 704 of the inhalation channel 706. During this process, the powder delivery mechanism realizes the powder delivery process. During the process of opening the cover of the outer cover 4, a second cover opening load stroke is carried out within this rotation range, which requires a relatively large torque. The torque of the outer cover 4 is constant during the second cover opening load stroke. Preferably, the torque of the outer cover 4 during the second cover opening load stroke is 0.1 N·m, ensuring that the outer cover 4 is opened smoothly and evenly, without sudden change in torque until the cover is opened completely, thereby ensuring the powder delivery effect and avoiding powder leakage or waste due to flying.

[0165] The outer cover 4 is linked and cooperated with the powder metering wheel 9 and the air compression mechanism respectively. When the outer cover 4 is configured at the first position, the airbag pressing member 17 is limited at the fifth position. During the process of the outer cover 4 rotating from the first position to the second position, the limitation on the airbag pressing member 17 is first released, so that the elastic member 19 drives the airbag pressing member 17 to move from the fifth position to the sixth position, and then drives the powder metering wheel 9 to rotate from the third position to the fourth position. During the process of the outer cover 4 reversely resetting from the second position to the first position, it drives the powder metering wheel 9 to reversely reset from the fourth position to the third position, and drives the airbag pressing member 17 to move reversely and reset from the sixth position to the fifth position.

[0166] After the powder delivery mechanism completes the powder delivery process, the outer cover 4 rotates to the second position, and the dosing cup 902 of the powder metering wheel 9 of the powder delivery mechanism is at a position corresponding to the inlet 704 of the inhalation channel 706. The outer cover 4 is fully opened to expose the outlet 102 of the mouthpiece 101, and the user can suck at the position of the outlet 102 of the mouthpiece 101, which is convenient for triggering the inhalation trigger mechanism to achieve the inhalation trigger function.

[0167] See Figures 15A to 23B , Figure 15A is Figure 1 A schematic structural diagram of the inhalation trigger device of the provided powder inhaler when it is in a state on the powder container. Figure 15B is Figure 15A A schematic structural diagram of the inhalation trigger device provided when it is in another state on the powder container. Figure 16A is Figure 15A A schematic structural diagram of the inhalation trigger device provided after removing the powder container. Figure 16B is Figure 15B A schematic structural diagram of the inhalation trigger device provided after removing the powder container. Figure 17A is Figure 16A A schematic structural diagram of the inhalation trigger device provided from another angle. Figure 17B is Figure 16B A schematic structural diagram of the inhalation trigger device provided from another angle. Figure 18A is Figure 1 A schematic exploded view of the counting mechanism of the provided powder inhaler. Figure 18B is Figure 18A A schematic assembled view of the counting mechanism. Figure 20 is Figure 1 A schematic structural diagram of the dose protection plate of the inhalation trigger device of the provided powder inhaler. Figure 21A is Figure 1 A schematic cross-sectional assembled view of the powder metering wheel and the dose protection plate of the provided powder inhaler when in a state. Figure 21B is Figure 1 A schematic cross-sectional assembled view of the powder metering wheel and the dose protection plate of the provided powder inhaler when in another state. Figure 21C is Figure 21A Partial enlarged view of Figure 21D is Figure 21B Partial enlarged view of Figure 21E is Figure 1 A schematic cross-sectional assembled view of the powder metering wheel and the dose protection plate of the provided powder inhaler when in yet another state. Figure 21F is Figure 21E Partial enlarged view of Figure 22A is Figure 1Schematic structural view of the air intake baffle of the inhalation trigger device of the provided powder inhaler at an angle Figure 22B is Figure 22A Schematic structural view of the air intake baffle at another angle provided Figure 22C is ​ Schematic structural view of the air intake baffle at yet another angle provided ​ is ​ Schematic structural view of the front housing of the provided powder inhaler at an angle ​ is ​ Schematic structural view of the front housing of the provided powder inhaler at another angle

[0168] (3) Inhalation trigger mechanism

[0169] See ​ , the inhalation trigger mechanism includes an air intake baffle 11 and a dose protection plate 10. The dose protection plate 10 includes an occlusion part 1004, and the air intake baffle 11 is linked and cooperated with the dose protection plate 10. The powder inhaler further includes a return torsion spring 15 and a driving torsion spring 16. The air intake baffle 11 and the dose protection plate 10 of the inhalation trigger mechanism, in combination with the return torsion spring 15, the driving torsion spring 16, as well as the powder container 7, the powder metering wheel 9, and the driving cam 12, jointly achieve the inhalation trigger function

[0170] See ​ and 13B , the powder container 7 further has an air flow channel 708 communicating with the inhalation channel 706, and the inhalation channel 706 needs to achieve communication with the outside atmosphere through the air flow channel 708. See ​ , when the inhalation trigger mechanism is in the initial state, the air intake baffle 11 blocks the air flow channel 708, the air flow channel 708 is not in communication with the outside atmosphere, and the occlusion part 1004 of the dose protection plate 10 occludes the powder outlet of the dose cup 902 located at the inlet 704 of the inhalation channel 706. At this time, the inhalation channel 706 cannot achieve communication with the outside atmosphere through the air flow channel 708. When the negative pressure inside the inhalation channel 706 is greater than the threshold value, that is, when the inhalation flow rate of the user is higher than the working threshold value, the inhalation trigger mechanism is triggered to act. Specifically, the air intake baffle 11 rotates and opens the air flow channel 708, the air flow channel 708 is in communication with the outside atmosphere, the inhalation channel 706 achieves communication with the outside atmosphere through the air flow channel 708, and the air intake baffle 11 triggers the dose protection plate 10 to rotate, so that the occlusion part 1004 of the dose protection plate 10 deviates and does not occlude the powder outlet of the dose cup 902, and the powder outlet of the dose cup 902 is exposed at the position of the inlet 704 of the inhalation channel 706. Among them, the working threshold value can be in the range of 15 L / min to 35 L / min. Preferably, the working threshold value for triggering the inhalation trigger mechanism to act is in the range of 20 L / min - 25 L / min

[0171] It can be understood that an inhalation trigger mechanism is provided in the powder inhaler. Only when the inhalation flow rate of the user is higher than the working threshold, the intake baffle 11 will rotate and open the air flow channel 708, so that the inhalation channel 706 communicates with the outside atmosphere through the air flow channel 708, and the rotation of the intake baffle 11 will trigger the rotation of the dose protection plate 10 to not block the powder outlet of the dose cup 902, so that the powder outlet of the dose cup 902 communicates with the inhalation channel 706, and the powder in the dose cup 902 is exposed and is carried out and depolymerized by the air flow in the inhalation channel 706. At this time, the air flow rate is relatively high and the depolymerization effect is good, realizing the flow rate threshold control of powder release, improving the depolymerization effect of powder release, and avoiding powder waste.

[0172] See ​ 、 ​ , there is an installation hole 707 on the side wall of the intake port of the air flow channel 708. The intake baffle 11 is rotatably installed on the installation hole 707, and the side wall of the air flow channel 708 surrounds the intake baffle 11.

[0173] Specifically, the intake baffle 11 includes a baffle body 1110, and the baffle body 1110 is rotatably connected to the side wall of the air flow channel 708. In one embodiment, the intake baffle 11 further includes a rotating shaft 1106. The rotating shaft 1106 is arranged at the first end of the baffle body 1110, and the rotating shaft 1106 passes through the installation hole 707 on the side wall of the port of the air flow channel 708 and is rotatably connected to the installation hole 707.

[0174] See ​ 、 ​ 、 ​ , the first surface of the baffle body 1110 has a convex platform 1101. The first surface is the surface of the baffle body 1110 facing outside the port of the air flow channel 708. The convex platform 1101 is defined as the second convex platform, and the convex platform 1101 is used to increase the complexity of the side flow channel. Specifically, a convex platform 1101 protruding from the outer surface of the baffle body 1110 is provided on the baffle body 1110, so that the side flow channel changes from a direct flow channel to an "L"-shaped flow channel, thereby increasing the flow resistance of the air flow and realizing a lower trigger flow rate under the condition of the same wind area, making it easier to realize the inhalation trigger function and facilitating the use of the powder inhalation device by users with weak bodies. The "L"-shaped flow channel means that the flow channel includes a bent first flow channel section and a second flow channel section, and the included angle between the first flow channel section and the second flow channel section can be 80-100 degrees, such as 90 degrees, which will be introduced in detail later.

[0175] The outer surface of the baffle body 1110 of the present application is defined as the outer surface facing the outside of the port of the air flow channel 708 with respect to the port of the air flow channel 708. The boss 1101 can be directly protruded from the outer surface of the baffle body 1110. For example, the baffle body 1110 is a solid structure; the boss 1101 can also be formed by recessing the baffle body 1110, that is, a part of the baffle body 1110 is bent outward toward the outside of the port of the air flow channel 708 to form the boss 1101, so that the baffle body 1110 is only a frame, which can reduce the weight of the intake baffle 11. The boss 1101 can be integrally formed with the baffle body 1110, or the boss 1101 can be directly connected and fixed on the outer surface of the baffle body 1110.

[0176] In an embodiment, the boss 1101 covers the central area of the surface of the baffle body 1110 facing outside the port of the air flow channel 708. The projection of the boss 1101 on the baffle body 1110 is similar to the shape of the baffle body 1110, and the projection of the boss 1101 on the baffle body 1110 covers more than 60% of the area of the baffle body 1110, so as to further increase the flow resistance of the side flow channel, ensure the consistency of the suction resistance at each stage during the drug administration process of the powder inhaler, improve the drug administration effect of the powder inhaler, and further improve the user compliance, so that the user has a better user experience. The area of the projection of the boss 1101 on the baffle body 1110 covering the baffle body 1110 is related to the width of the annular surface 1109 and can be designed according to needs.

[0177] In other embodiments, the boss 1101 covers other areas of the surface of the baffle body 1110 facing outside the port of the air flow channel 708. The boss 1101 can also be set to other shapes, and the ratio of the projected area of the boss 1101 on the baffle body 1110 to the area of the baffle body 1110 can also be set to other values, as long as the boss 1101 can increase the complexity of the side flow channel and increase the flow resistance of the air flow.

[0178] In an embodiment, along the direction from the first end of the baffle body 1110 to the opposite second end (the direction away from the rotating shaft 1106), the height of the boss 1101 gradually decreases, so that the top surface of the boss 1101 forms an inclined surface, and the inclined surface has a certain guiding effect on guiding the air flow direction, so as to more easily realize the inhalation trigger function.

[0179] Specifically, refer to Figure 9G 、 Figure 9H 、 Figure 15A 、 Figure 15B and Figures 22A to 23B, the front housing 1 has a suction nozzle 101, the suction nozzle 101 is arranged corresponding to the inhalation channel 706 and communicates with the inhalation channel 706. An air inlet 104 and a grille 103 are arranged on the side wall of the front housing 1, and the grille protrudes from the outer wall surface of the front housing 1. The air inlet 104 communicates the outside atmosphere and the space inside the housing assembly. In a specific embodiment, the grille 103 corresponds to the position above the suction nozzle 101 and is adjacent to the air inlet 104. The grille 103 protrudes from the outer wall surface of the front housing 1, which can prevent the lips from contacting the air inlet 104 and blocking the air inlet 104 when the user inhales the powder from the suction nozzle 101 position, resulting in problems such as poor air intake or the outside atmosphere being unable to enter the housing assembly from the air inlet 109. As Figure 23B shown, in a preferred embodiment, three air inlets 104 and two grilles 103 are arranged on the side wall of the front housing 1, and the grilles 103 and the air inlets 104 are arranged alternately. In other embodiments, the air inlets 104 and the grilles 103 can be arranged at other positions, and they can also be arranged in any other number.

[0180] As Figure 22C shown, along the circumference of the boss 1101, the outer peripheral side surface of the boss 1101 and the outer peripheral side surface of the baffle body 1110 are evenly spaced. The part of the surface of the baffle body 1110 facing outside the port of the air flow channel 708 that is not covered by the boss 1101 forms an annular surface 1109. Both the annular surface 1109 and the outer peripheral side surface of the boss 1101 are used to cooperate with the front housing 1 of the powder inhaler to form an L-shaped air inlet channel. Specifically, as Figure 23A and Figure 23B shown, an annular flange 111 is arranged on the inner wall surface of the front housing 1, and the annular flange 111 surrounds the air inlet 104. Specifically, the annular flange 111 surrounds three air inlets 104 and two grilles 103. Refer to Figures 9C to 9H, one end of the annular flange 111 is disposed within the air flow passage 708, and the side wall of the front housing 1 blocks the port of the air flow passage 708. When the inhalation trigger mechanism is in the initial state, the inner circumferential side surface of the annular flange 111 of the front housing 1 and the outer circumferential side surface of the boss 1101 of the intake baffle 11 are spaced apart and cooperate to form a first flow passage section. The end surface of the annular flange 111 away from the front housing 1 abuts against the annular surface 1109 of the intake baffle 11 and cooperates to form a second flow passage section. The first flow passage section and the second flow passage section communicate with each other to form an L-shaped intake air flow passage Q1. That is, before the inhalation trigger mechanism is triggered, the outside air enters the internal space of the housing assembly through the air intake 104 on the front housing 1, and can enter the powder inhaler through the L-shaped intake air flow passage Q1 formed by the cooperation of the baffle body 1110, the boss 1101 of the intake baffle 11 and the annular flange 111 of the front housing 1, ensuring the consistency of the suction resistance at each stage during the drug administration process of the powder inhaler, avoiding the too large suction resistance inside the powder inhaler before inhalation trigger from affecting the air compression process or the powder delivery process, and improving the drug administration effect of the powder inhaler.

[0181] When the user inhales at the mouthpiece 101 and the negative pressure inside the inhalation passage 706 is greater than the threshold value, that is, when the air flow velocity during the user's inhalation is greater than the working threshold value, the internal negative pressure will push the intake baffle 11 to rotate and open the air flow passage 708, and the air flow passage 708 communicates with the outside air through the air intake 104.

[0182] As Figure 9G and Figure 9H shown, the distance between the top surface of the boss 1101 of the intake baffle 11 and the surface of the baffle body 1110 facing outside the port of the air flow passage 708 is the first distance L1, that is, the height of the boss 1101 is L1, and the thickness of the annular flange 111 on the inner wall surface of the front housing 1 is the second distance L2. The ratio between the first distance L1 and the second distance L2 is 1:2 - 7:1. Preferably, the first distance L1 is greater than the second distance L2, and the ratio between the first distance L1 and the second distance L2 is 1:1 - 5:1. Setting the ratio between the first distance L1 and the second distance L2 within the above range can increase the pressure difference between the inner side and the outer side of the intake baffle 11, that is, increase the pressure difference between the side of the intake baffle 11 close to the air flow passage 708 and the side of the intake baffle 11 close to the air intake 104 of the front housing 1, increasing other resistances. The increase in the pressure difference on both sides of the intake baffle 11 is more conducive to pushing the intake baffle 11 to rotate to open the air flow passage 708, thereby facilitating the realization of the inhalation trigger function more easily.

[0183] In one embodiment, the intake baffle 11 further includes a rotating member 1108. The rotating shaft 1106 is disposed at one end of the baffle body 1110. The rotating member 1108 is connected to the free end of the rotating shaft 1106 and is spaced apart from the baffle body 1110. The first end of the rotating member 1108 has a curved surface facing the outside of the port of the air flow passage 708 (specifically, the line connecting the two ends of the curved surface is substantially parallel to the baffle body 1110). Specifically, the curved surface can be an arc surface, and the curved surface is used to guide the air flow so that the air flow path lengths on both sides of the baffle body 1110 are the same.

[0184] Specifically, refer to Figure 9C , Figure 13A , Figure 13B , Figure 15A and Figure 15B , the side wall of the air flow passage 708 of the powder container 7 is connected to the side wall of the storage cavity 715. The side wall of the air flow passage 708 connected to the side wall of the storage cavity 715 is provided with a first diversion hole 710 and a second diversion hole 717 spaced apart from each other at one end. The end of the suction passage 706 close to the nozzle 101 has a first air inlet 718 and a second air inlet 719 spaced apart from each other. The first diversion hole 710 communicates the air flow passage 708 with the first air inlet 718, and the second diversion hole 717 communicates the air flow passage 708 with the second air inlet 719. The inner wall surface of the front housing 1 and the outer wall surface of the suction passage 706 are spaced apart to form a diversion passage 720 (as Figure 9C ), and the diversion passage 720 communicates the air flow passage 708 with the first air inlet 718 and the second air inlet 719. Refer to Figure 15B, when the flow rate of the user's inhalation air flow is greater than the working threshold and the negative pressure inside the inhalation channel 706 is greater than the threshold, the intake baffle 11 rotates and opens the air flow channel 708. The air inlet 104 on the front housing 1 penetrates through the first diversion hole 710 and the second diversion hole 717 through the air flow channel 708. After the outside air enters the inside of the housing assembly through the air inlet 104 of the front housing 1, a part of the gas flows through the air flow channel 708 to the first diversion hole 710, a part of the gas flows through the air flow channel 708 to the second diversion hole 717, and the remaining gas flows through the air flow channel 708 to the diversion channel 720. Among them, the gas flowing out of the first diversion hole 710 flows along the outer side surface of the side wall of the air flow channel 708 to the second curved surface 1104 and finally flows to the first air inlet 718, and the gas flowing out of the second diversion hole 717 flows along the outer side surface of the side wall of the air flow channel 708 to the first curved surface 1103 and finally flows to the second air inlet 719. The gas flowing out of the diversion channel 720 can enter the first air inlet 718 and the second air inlet 719 at the same time, facilitating the inhalation of powder through the inhalation channel 706. It can be understood that by setting the air inlet 104 of the front housing 1 to three, and respectively setting the first diversion hole 710, the second diversion hole 717 and the diversion channel 720, the ventilation cross-sections of the three-way air flows can be made consistent with the ventilation cross-sectional area of the three air inlets 104 of the front housing 1, avoiding gas loss during intake; at the same time, both the first curved surface 1103 and the second curved surface 1104 are arc-shaped surfaces, which can guide the air flow direction and make the lengths of the air flow paths on both sides of the baffle body 1110 the same.

[0185] In one embodiment, as Figure 13B and Figure 15B shown, there are two oppositely arranged arc-shaped ribs inside the inhalation channel 706. The two arc-shaped ribs and the side wall of the inhalation channel 706 enclose a vortex-shaped air passage. The gas enters the inside of the inhalation channel 706 through the first air inlet 718 and the second air inlet 719 respectively to form a vortex. The vortex carries the powder in the dose cup 902 at the inlet 704 of the inhalation channel 706 into the inhalation channel 706, and finally flows to the mouthpiece 101 to be inhaled by the user after being depolymerized in the inhalation channel 706. The above setting is more conducive to the depolymerization of powders such as medicine powder in the inhalation channel 706, avoiding waste of medicine powder and improving the utilization rate of medicine powder.

[0186] See Figures 22A to 22C, the second end of the rotating member 1108 away from the surface of the baffle body 1110 has a protruding cylinder 1102, which is defined as the third cylinder. The cylinder 1102 is used to abut against the driving arm of the return torsion spring 15 of the powder inhaler, so that the baffle body 1110 fits against the front housing 1. Specifically, in one embodiment, the number of the rotating shafts 1106 is two, and the two rotating shafts 1106 are respectively arranged on the opposite sides of the baffle body 1110, and the two rotating shafts 1106 are respectively defined as the first rotating shaft 1106a and the second rotating shaft 1106b. The number of the rotating members 1108 is two, and the two rotating members 1108 are respectively defined as the first rotating member 1108a and the second rotating member 1108b. The first rotating member 1108a is connected to the free end of the first rotating shaft 1106a. The first end of the first rotating member 1108a has a first curved surface 1103, and the second end away from the surface of the baffle body 1110 has a protruding cylinder 1102. The second rotating member 1108b is connected to the free end of the second rotating shaft 1106b. The first end of the second rotating member 1108b has a second curved surface 1104, and the second end has an arc groove surface 1107.

[0187] In one embodiment, the side surface of the baffle body 1110 further has a shoulder 1105 surrounding the rotating shaft 1106. The shoulder 1105 is arranged at an interval from the rotating member 1108. The shoulder 1105 is used to keep the gaps between both sides of the baffle body 1110 and the side walls of the air flow channel 708 uniform, so as to more stably realize the inhalation trigger function.

[0188] See Figure 13A and Figure 13B 、 Figures 15A to 22C , the powder container 7 further has a second cylindrical groove 712. The second cylindrical groove 712 is coaxially and oppositely arranged with the first cylindrical groove 716 and has a common bottom wall (not marked in the figure). The counting mechanism and the dose protection plate 10 are installed in the second cylindrical groove 712. See Figures 15A to 19B , the counting mechanism includes a counter base 21. The counter base 21 has a cylindrical shaft 2111. Both the dose protection plate 10 and the counter base 21 of the counting mechanism are installed in the second cylindrical groove 712 on the powder container 7. The counter base 21 axially limits the dose protection plate 10. The powder inhaler further includes a driving torsion spring 16 and a return torsion spring 15. The driving torsion spring 16 is sleeved on the cylindrical shaft 2111 of the counter base 21. A limiting groove 2109 is arranged on the counter base 21. The fixed arm of the driving torsion spring 16 is fixed through the limiting groove 2109 on the counter base 21. The return torsion spring 15 is installed on the gear bracket 14.

[0189] See Figures 15A to 20, the dose protection plate 10 includes an annular body 1000, a shielding portion 1004, and a pressing member 1006. The pressing member 1006 of the dose protection plate 10 is disposed on the outer side surface of the annular body 1000. The shielding portion 1004 is connected to one end of the annular body 1000 and is spaced apart from the pressing member 1006. The shielding portion 1004 is used to shield or not shield the dose cup 902. The annular body 1000 is disposed in the second cylindrical groove 712 of the powder container 7, as Figure 18B shown. The annular body 1000 is used to accommodate the counting mechanism. The side wall of the second cylindrical groove 712 of the powder container 7 has a notch. The pressing member 1006 extends out of the second cylindrical groove 712 through the notch on the side wall of the second cylindrical groove 712 and can rotate back and forth within the notch. As Figure 20 shown, the surface of the pressing member 1006 away from the annular body 1000 includes a pressing arc surface 1002. When the inhalation trigger mechanism is in the initial state, that is, before being triggered or after the inhalation trigger mechanism is reset, the arc groove surface 1107 of the rotating member 1108 of the intake baffle 11 cooperates with the pressing arc surface 1002 of the dose protection plate 10 to achieve concentric arc surface pressing.

[0190] The shielding portion 1004 is connected to one end of the annular body 1000 and is used to shield or not shield the dose cup 902. As Figure 13B shown, an arc-shaped notch (not labeled in the figure) is provided on the common bottom wall of the powder container 7, so that the shielding portion 1004 of the dose protection plate 10 passes through the arc-shaped notch and enters the first cylindrical groove 716, and can rotate back and forth within the arc-shaped notch, so as to be located at the inlet 704 of the inhalation channel 706 and shield the dose cup 902 at this position before the inhalation trigger mechanism is triggered, and after the inhalation trigger mechanism is triggered, rotate within the arc-shaped notch to deviate from the inlet 704 position of the inhalation channel 706 to not shield the dose cup 902, so that the powder in the dose cup 902 is exposed for easy inhalation by the user.

[0191] Specifically, referring to Figures 15A to 17B 、 Figure 20 , the pressing member 1006 includes a cylindrical convex surface 1001. The cylindrical convex surface 1001 is disposed on one side of the pressing arc surface 1002. As Figure 16A and Figure 16B shown, the driving arm of the driving torsion spring 16 of the powder inhaler acts on the cylindrical convex surface 1001. So that when the user's inhalation flow rate is higher than the working threshold and the intake baffle 11 rotates, after the pressing arc surface 1002 of the dose protection plate 10 disengages from the arc groove surface 1107 of the intake baffle 11, the dose protection plate 10 rotates under the action of the driving arm of the driving torsion spring 16, so that the shielding portion 1004 of the dose protection plate 10 changes from shielding the dose cup 902 of the powder metering wheel 9 to not shielding, so that the powder in the dose cup 902 of the powder metering wheel 9 is exposed to the air flow for the user to suction.

[0192] The movement mode of the inhalation trigger mechanism during the inhalation trigger process will be specifically introduced below.

[0193] Refer to Figure 9D and Figures 15A to 22C . Before the outer cover 4 is opened to the in-place position, as Figure 15A and Figure 16A and Figure 17A and Figure 22A shown, the driving arm of the return torsion spring 15 acts on the cylinder 1102 of the intake baffle 11. The driving arm of the return torsion spring 15 presses against the intake baffle 11 to fit against the front housing 1. The boss 1101 is embedded in the annular flange 111. The intake baffle 11 does not rotate, and the suction channel 706 cannot communicate with the outside atmosphere through the air flow channel 708. As Figure 20 and Figure 15A shown, the driving arm of the driving torsion spring 16 acts on the cylindrical convex surface 1001 of the pressing member 1006 of the dose protection plate 10. At this time, the pressing arc surface 1002 of the pressing member 1006 of the dose protection plate 10 acts on the arc groove surface 1107 of the rotating member 1108 of the intake baffle 11 (as Figure 16A ), achieving concentric arc surface pressing.

[0194] The guiding groove 1209 of the driving cam 12 is located on the surface of the body portion 1200 facing the gear 1203. The surface of the body portion 1200 facing away from the gear 1203 has a rib 1208. When the outer cover 4 is opened to the in-place position, that is, after the outer cover 4 rotates to the second position, the rib 1208 of the driving cam 12 presses the driving arm of the return torsion spring 15 away from the cylinder 1102 of the intake baffle 11 (as Figure 17B ). The rib 1208 releases the limit of the return torsion spring 15 on the intake baffle 11 of the inhalation trigger mechanism. At this time, the intake baffle 11 is not affected by the pressing force of the return torsion spring 15, and only the pressing friction force of the pressing arc surface 1002 of the dose protection plate 10 on the arc groove surface 1107 of the intake baffle 11 remains. At the same time, after the outer cover 4 rotates to the second position, the dose cup 902 of the powder metering wheel 9 is delivered to the position of the inlet 704 of the suction channel 706, and the shielding portion 1004 of the dose protection plate 10 is located at the position of the inlet 704 of the suction channel 706 and shields the powder outlet of the dose cup 902.

[0195] After the outer cover 4 is opened in place and before the inhalation trigger mechanism is triggered, there is only the pressing frictional force of the pressing arc surface 1002 of the dose protection plate 10 on the arc groove surface 1107 of the intake baffle 11, and the intake baffle 11 does not rotate yet. When the user inhales and the flow rate of the user's inhalation airflow is greater than the working threshold and the negative pressure in the inhalation channel 706 is greater than the threshold, the airflow thrust generated by the inhalation airflow acts on the intake baffle 11, overcoming the frictional force of the pressing arc surface 1002 on the arc groove surface 1107, and the inhalation trigger mechanism is triggered, causing the intake baffle 11 to deflect and rotate. After the intake baffle 11 rotates, the arc groove surface 1107 of the intake baffle 11 rotates synchronously, and the pressing arc surface 1002 of the dose protection plate 10 disengages from the arc groove surface 1107 of the intake baffle 11 (as shown in Figure 16B ). The dose protection plate 10 rotates under the driving force of the driving torsion spring 16, and the shielding portion 1004 of the dose protection plate 10 rotates synchronously within the arc-shaped notch, causing the shielding portion 1004 of the dose protection plate 10 to deviate and not shield the powder outlet of the dose cup 902. At this time, the powder outlet of the dose cup 902 of the powder metering wheel 9 is exposed in the inhalation channel 706, and under the action of the user's inhalation airflow, the powder in the dose cup 902 flows through the inhalation channel 706 and the nozzle 101 and is inhaled by the user. In a preferred embodiment, the dose protection plate 10 rotates downward by 38 degrees under the driving force of the driving torsion spring 16, so that the powder outlet of the dose cup 902 communicates with the inhalation channel 706, and the powder in the dose cup 902 is exposed to the airflow and taken away.

[0196] See Figure 14B and Figure 20 , the dose protection plate 10 further includes a wedge-shaped column 1005. One end of the wedge-shaped column 1005 is connected to the annular body 1000 and is spaced from both the shielding portion 1004 and the pressing member 1006. The other end of the wedge-shaped column 1005 is used to cooperate with the driving spring arm 910 of the powder metering wheel 9, so that during the closing process of the outer cover 4, the driving spring arm 910 drives the dose protection plate 10 to rotate and reset through the wedge-shaped column 1005. The specific process and method of the driving spring arm 910 driving the dose protection plate 10 to rotate and reset through the wedge-shaped column 1005 will be described in detail in the subsequent process of the closing trigger function mechanism of the outer cover 4 resetting, and will not be elaborated here.

[0197] See Figure 20 , the dose protection plate 10 further includes a spring arm hook 1003. One end of the spring arm hook 1003 is connected to the annular body 1000. Specifically, one end of the spring arm hook 1003 is connected to the inner wall surface of the annular body 1000, and the other end of the spring arm hook 1003 is used to drive the counting mechanism to count. The counting mechanism and the method and process of the spring arm hook 1003 driving the counting mechanism to count will be specifically introduced below.

[0198] Refer to Figures 24A to 25 ,Figure 24A is Figure 18A Schematic structural diagram of the units digit wheel of the provided counting mechanism at an angle Figure 24B is Figure 24A Schematic structural diagram of the units digit wheel at another angle provided Figure 25 is Figure 18A Schematic structural diagram of the tens digit wheel of the provided counting mechanism

[0199] (4) Counting mechanism

[0200] See Figure 18A and Figure 18B and Figures 22A to 25 The counting mechanism includes a counter base 21, a tens digit wheel 22, a units digit wheel 23, and a counter intermediate gear 24. The counting mechanism realizes the counting function under the cooperation of the dose protection plate 10 and the powder container 7. Specifically, the tens digit wheel 22 is installed on the counter base 21. The counter base 21 has a cylindrical surface 2101, a snap 2102, and an outer arc boss 2108. The tens digit wheel 22 has an inner ring 2203 and an inner arc boss 2205. The cylindrical surface 2101 of the counter base 21 cooperates with the inner ring 2203 of the tens digit wheel 22 to realize coaxial rotation. The snap 2102 on the counter base 21 performs axial limit on the tens digit wheel 22. The outer arc boss 2108 of the counter base 21 cooperates with the inner arc boss 2205 of the tens digit wheel 22 to realize the rotation limit of the tens digit wheel 22.

[0201] See Figure 4 and Figure 25 A digital display window 201 is provided on the housing assembly. Specifically, the digital display window 201 is provided on the rear housing 2 of the housing assembly. The tens digit wheel 22 also has a full red warning feature 2201. When the full red warning feature 2201 of the tens digit wheel 22 is displayed in the digital display window 201 on the rear housing 2, the tens digit wheel 22 is limited and stops rotating.

[0202] A first mounting hole 2103 is also provided on the counter base 21. The counter intermediate gear 24 is mounted on the first mounting hole 2103 on the counter base 21. The counter intermediate gear 24 realizes transmission by meshing with the gear feature of the tens digit wheel 22 through its gear feature.

[0203] The units digit wheel 23 has a second mounting hole 2303 and a toothed driving post 2301. A buckle post 2105 is provided on the counter base 21. The second mounting hole 2303 on the units digit wheel 23 cooperates with the buckle post 2105 on the counter base 21 to achieve coaxial mounting and axial limitation. The units digit wheel 23 has an annular guiding structure 2305 for mating installation with the tens digit wheel 22. The outer peripheral side of the units digit wheel 23 is printed with a first digit 2302, and the outer peripheral side of the tens digit wheel 22 is printed with a second digit 2202 for facilitating counting. The toothed driving post 2301 on the units digit wheel 23 cooperates with the counter intermediate gear 24. When the units digit wheel 23 rotates one full circle and jumps from the digit "0" to the digit "9", the toothed driving post 2301 of the units digit wheel 23 drives the counter intermediate gear 24 to rotate two teeth. At the same time, the tens digit wheel 22 meshes with the counter intermediate gear 24, and the tens digit wheel 22 synchronously rotates two teeth to achieve a digit jump.

[0204] See Figures 16A to 20 , the driving of the units digit wheel 23 is achieved through the reciprocating motion of the dose protection plate 10. Specifically, as Figure 24A shown, the units digit wheel 23 is provided with ratchet teeth 2304. See Figure 20 , the dose protection plate 10 has a spring arm claw 1003. One end of the spring arm claw 1003 is connected to the annular body 1000. The ratchet teeth 2304 on the units digit wheel 23 cooperate with the spring arm claw 1003 of the dose protection plate 10. Before the inhalation trigger mechanism is triggered, the spring arm claw 1003 hooks one of the ratchet teeth 2304 on the units digit wheel 23; when the inhalation trigger mechanism is triggered to move, the intake baffle 11 rotates and then triggers the dose protection plate 10 to rotate under the action of the driving arm of the driving torsion spring 16. The rotation of the dose protection plate 10 causes the spring arm claw 1003 to rotate synchronously. After the spring arm claw 1003 rotates, it hooks the next ratchet tooth 2304 on the units digit wheel 23; during the process of closing the outer cover 4, the inhalation trigger mechanism resets, and the dose protection plate 10 rotates in reverse and returns to the original state before the inhalation trigger mechanism is not triggered. Since the spring arm claw 1003 of the dose protection plate 10 hooks the next ratchet tooth 2304 on the units digit wheel 23, during this process, the dose protection plate 10 rotates in reverse and the hooked ratchet tooth 2304 also rotates. The units digit wheel 23 rotates under the action of the spring arm claw 1003 to achieve a digit jump.

[0205] In a preferred embodiment, the units digit wheel 23 is provided with ten ratchet teeth 2304. When the inhalation trigger mechanism is triggered to move, it triggers the dose protection plate 10 to rotate 38 degrees, and the spring arm claw 1003 hooks the next ratchet tooth 2304. When the inhalation trigger mechanism resets, the dose protection plate 10 rotates back 38 degrees, and the units digit wheel 23 rotates 36 degrees under the action of the spring arm claw 1003 to achieve a digit jump.

[0206] Further, a limiting elastic arm 711 is also provided on the powder container 7. Specifically, as Figure 13B shown, the side of the second cylindrical groove 712 of the powder container 7 has a limiting elastic arm 711, and the limiting elastic arm 711 is used to limit the one-way rotation of the counting mechanism. The limiting elastic arm 711 provided on the powder container 7 cooperates with the ratchet teeth 2304 on the units digit wheel 23 to achieve the one-way rotation of the units digit wheel 23. That is, when the dose protection plate 10 rotates downward during the downstroke, the arm hook 1003 on the dose protection plate 10 scratches the units digit wheel 23. Due to the action of the limiting elastic arm 711 on the ratchet teeth 2304 of the units digit wheel 23, the units digit wheel 23 will not rotate along with the dose protection plate 10. When the dose protection plate 10 returns to its original position during the reverse rotation, the arm hook 1003 on the dose protection plate 10 pulls the units digit wheel 23 to rotate 36° to achieve a one-way decremental count. Through the above settings, it can effectively prevent the problem that when the dose protection plate 10 rotates downward during the downstroke, the arm hook 1003 drives the units digit wheel 23, resulting in abnormal operation of the counter.

[0207] For the sake of easy understanding, the cooperation relationship of each functional mechanism will be introduced below in combination with the process of closing the lid, as well as how to trigger the counting mechanism to count and how to reset each functional mechanism during the lid closing process.

[0208] During the process of closing the outer lid 4, that is, when the outer lid 4 rotates in reverse from the second position back to the first position, it drives the powder delivery mechanism and the air compression mechanism to reset respectively, and triggers the intake baffle 11 to rotate in reverse and reset, so that the powder inhaler returns to its original state; among them, the reset of the dose protection plate 10 drives the counter to achieve the counting of one digit.

[0209] The angle of the outer cover 4 in the first position is defined as 0 degrees, and the angle of the outer cover 4 in the second position is greater than or equal to 120 degrees and less than or equal to 180 degrees. In one embodiment, the angle of the outer cover 4 in the second position is 150 degrees. During the process of closing the outer cover 4 (the process of the outer cover 4 returning from the second position to the first position), that is, during the process of the outer cover 4 reversing from 150 degrees to 0 degrees, first there is a reverse idle stroke, and the outer cover 4 drives the drive cam 12 to also reverse an idle stroke. Preferably, the outer cover 4 first reverses an idle stroke of 62.5 degrees, and the corresponding drive cam 12 reverses an idle stroke of 75 degrees. That is, when the closing idle stroke of the outer cover 4 ends, the angle of the outer cover 4 is 87.5 degrees, and the angle of the drive cam 12 is 105 degrees. When the outer cover 4 reverses from 87.5 degrees to 0 degrees, the drive cam 12 drives the powder metering wheel 9 to rotate and reset. The powder metering wheel 9 rotates and resets from the fourth position to the third position, and the dosing cup 902 of the powder metering wheel 9 rotates from the position corresponding to the inlet 704 of the inhalation channel 706 to the position corresponding to the powder outlet 713 of the powder container 7, thereby realizing the reset of the powder delivery mechanism. During this process, the drive cam 12 reverses from 105 degrees to 0 degrees. When the outer cover 4 returns to the first position, that is, after the closing of the cover is completed, the arc-shaped rib 405 on the outer cover 4 cooperates with the sound-producing spring arm 108 on the front housing 1 to realize a sound prompt for the cover to be closed in place, so as to prompt that the outer cover 4 is closed in place.

[0210] Since gear meshing transmission is adopted between the outer cover 4 and the drive gear 5, there is a gear clearance, resulting in the outer cover 4 not being able to closely fit with the front housing 1 after closing. In order to eliminate the problem that the outer cover 4 cannot be closed with the front housing 1 due to the influence of the gear clearance after the outer cover 4 is closed, as Figure 8A and Figure 8B shown, a tightening spring arm 502 is provided on the drive gear 5. The tightening spring arm 502 is defined as the second tightening spring arm. A limiting boss 106 is provided on the front housing 1. Tightening and closing are realized through the cooperation of the tightening spring arm 502 and the limiting boss 106 of the front housing 1, so that the outer cover 4 is closely attached to the front housing 1 to ensure that the cover is closed in place. At the same time, during the process of opening the outer cover 4, that is, during the process of the outer cover 4 rotating from the first position to the second position, initially it is an opening idle stroke. The outer cover 4 needs to overcome the resistance of the limiting boss 106 to the tightening spring arm 502 when rotating, so that the tightening spring arm 502 can cross the limiting boss 106 to facilitate the rotation of the outer cover 4, and non-human factor accidental opening of the cover can be prevented.

[0211] Further, referring to Figure 5A 、 Figure 6A and Figure 7A and Figure 7B, a limiting groove 403 is further provided on the connecting portion 406 of the outer cover 4 provided with the arc-shaped rib 405, and a limiting convex post 107 is further provided on the front housing 1. When the outer cover 4 is closed in place, that is, when the outer cover 4 is in the first position, the limiting convex post 107 is clamped in the limiting groove 403 to limit the outer cover 4 to the first position. Through the cooperation between the limiting groove 403 and the limiting convex post 107 of the front housing 1, the outer cover 4 and the front housing 1 are tightly closed, and a good fit is achieved between the outer cover 4 and the front housing 1, without gaps due to improper closing. At the same time, at the initial stage of the opening process of the outer cover 4, that is, during the empty stroke of opening the outer cover 4, it is also necessary to overcome the acting force of the limiting groove 403 on the limiting convex post 107 so that the limiting convex post 107 can be disengaged from the limiting groove 403 to facilitate the rotation of the outer cover 4, further preventing accidental opening due to non-human factors.

[0212] It can be understood that a limiting boss 106 and a tightening spring arm 502 are provided at the position corresponding to one of the connecting portions 406 of the outer cover 4, and a limiting groove 403 and a limiting convex post 107 are provided at the position corresponding to the other connecting portion 406. The closing of the outer cover 4 is limited on both opposite sides, so that when the outer cover 4 is in the first position, good fits can be achieved between both opposite sides of the outer cover 4 and the front housing 1, effectively avoiding problems such as the outer cover 4 not being closed in place, and there being a gap on one side while the other side is closed in place between the outer cover 4 and the front housing 1, ensuring the consistency of the closed state.

[0213] During the closing process of the outer cover 4, since the tip of the convex rod 1704 of the airbag pressing member 17 is limited in the stop groove 1213, it is first necessary to drive the tip of the convex rod 1704 of the airbag pressing member 17 to disengage from the stop groove 1213, that is, it is necessary to overcome the resistance of the stop groove 1213 to the tip of the convex rod 1704 of the airbag pressing member 17. During this process, the outer cover 4 undergoes the first empty stroke of closing the lid, and the outer cover 4 is reversed from 150 degrees to 140 degrees, which requires a relatively large torque. Preferably, within the first empty stroke of closing the lid, the torque of the outer cover 4 is 0.05 N·m. Driving the cam 12 to rotate causes the tip of the convex rod 1704 of the airbag pressing member 17 to disengage from the stop groove 1213 and abut against the second curved surface section 1212, which can effectively prevent accidental closing due to non-human factors.

[0214] During the process of the outer cover 4 reversing from 140 degrees to 87.5 degrees, the outer cover 4 drives the drive cam 12 to reverse to 105 degrees. During this process, the annular boss 1207 of the drive cam 12 does not contact the boss 905 of the powder metering wheel 9, and the powder metering wheel 9 does not rotate. The outer cover 4 performs the second closing cover idle stroke. Only the second drive cam 12 is reversing and resetting. The tip of the convex rod 1704 of the airbag pressing member 17 abuts against the second curved surface section 1212. Since the second curved surface is an arc surface, the airbag pressing member 17 does not move during this process and remains in the sixth position. During this process, it is not necessary to drive the powder metering wheel 9 to rotate, nor is it necessary to drive the airbag pressing member 17 to reset. The torque required for the outer cover 4 during the second closing cover idle stroke is small and is a constant torque. Preferably, the torque of the outer cover 4 during the second closing cover idle stroke is 0 N·m, which accelerates the closing cover process and increases the smoothness of closing the cover.

[0215] When the outer cover 4 reverses to 87.5 degrees, the annular boss 1207 of the drive cam 12 begins to contact the boss 905 of the powder metering wheel 9. During the process of the outer cover 4 reversing from 87.5 degrees to 62.5 degrees, it drives the drive cam 12 to reverse from 105 degrees to 75 degrees. During this process, the outer cover 4 performs the first closing cover load stroke. The annular boss 1207 of the drive cam 12 cooperates with the boss 905 of the powder metering wheel 9 and drives the powder metering wheel 9 to reverse. The powder metering wheel 9 begins to rotate from the fourth position to the third position. During this process, only the powder metering wheel 9 is resetting, and the tip of the convex rod 1704 of the airbag pressing member 17 still abuts against the second curved surface section 1212, and the airbag pressing member 17 still remains in the sixth position. Since the outer cover 4 needs to drive the powder metering wheel 9 to reverse and reset during the first closing cover load stroke, a relatively large constant torque is required. Preferably, the torque of the outer cover 4 during the first closing cover load stroke is 0.1 N·m to ensure that the powder metering wheel 9 can be driven to reverse.

[0216] Further, during the process of closing the outer cover 4, in a preferred embodiment, when the outer cover 4 reverses from 62.5 degrees to 0 degrees, the drive cam 12 reverses from 75 degrees to 0 degrees. Through the cooperation of the first curved surface section 1211 of the cam surface 1202 on the drive cam 12 and the arc surface 1703 of the airbag pressing member 17, when the drive cam 12 reverses, the first curved surface section 1211 of the cam surface 1202 continuously pushes up the airbag pressing member 17 until the arc surface 1703 of the airbag pressing member 17 falls into the arc-shaped groove 1201 of the drive cam 12, completing the reset of the air compression mechanism.

[0217] See Figures 21A to 21F, specifically, during the process of closing the outer cover 4, in a preferred embodiment, when the outer cover 4 rotates reversely from 56 degrees to 25 degrees, the driving cam 12 rotates reversely from 68 degrees to 30 degrees. During this process, the driving spring arm 910 on the powder metering wheel 9 cooperates with the wedge-shaped column 1005 of the dose protection plate 10 to drive the dose protection plate 10 to rotate and reset.

[0218] Specifically, during the process of the outer cover 4 rotating reversely from 87.5 degrees to 56 degrees, refer to Figure 21A and Figure 21C , the driving spring arm 910 on the powder metering wheel 9 does not contact the wedge-shaped column 1005 of the dose protection plate 10. During this process, the dose protection plate 10 does not rotate reversely. Refer to Figure 21B and Figure 21D , when the outer cover 4 rotates reversely to 56 degrees, the driving spring arm 910 on the powder metering wheel 9 starts to contact the wedge-shaped column 1005 of the dose protection plate 10. During the process of the outer cover 4 rotating reversely from 56 degrees to 25 degrees, the annular boss 1207 of the driving cam 12 contacts the boss 905 of the powder metering wheel 9. The reverse rotation of the driving cam 12 drives the reverse rotation of the powder metering wheel 9. Furthermore, the force exerted by the driving spring arm 910 of the powder metering wheel 9 on the wedge-shaped column 1005 of the dose protection plate 10 drives the dose protection plate 10 to rotate reversely by 38 degrees, realizing the reset of the dose protection plate 10. During the process of the outer cover 4 rotating reversely from 8 degrees to 0 degrees, the dose protection plate 10 has been reset and stops rotating. During this process, only the powder metering wheel 9 is still rotating reversely. Refer to Figure 21E and Figure 21F , the driving spring arm 910 on the powder metering wheel 9 will cross over the wedge-shaped column 1005 of the dose protection plate 10. When the outer cover 4 rotates reversely to 0 degrees, the powder metering wheel 9 is reset in place. The limit convex column 107 is clamped in the limit groove 403, and the top spring arm 502 acts on the limit boss 106 to ensure that the outer cover 4 is closed in place.

[0219] Before the outer cover 4 is closed in place, when the outer cover 4 is reversed by 12.5 degrees, at this time, the drive cam 12 is reversed by 15 degrees, and the rib 1208 on the drive cam 12 leaves the drive arm of the return torsion spring 15, and the drive arm of the return torsion spring 15 acts on the cylinder 1102 on the intake baffle 11 again, providing a return force for the intake baffle 11. Under the action of the return pressing force of the return torsion spring 15 on the intake baffle 11, the intake baffle 11 is reversed to complete the reset, and the pressing arc surface 1002 of the dose protection plate 10 acts on the arc groove surface 1107 of the intake baffle 11 again to achieve concentric arc surface pressing, and the dose protection plate 10 of the inhalation trigger mechanism is reset. When the outer cover 4 is reversed from 8 degrees to 0 degrees, the drive spring arm 910 on the drive powder metering wheel 9 crosses the wedge-shaped column 1005 on the dose protection plate 10. During this process, the outer cover 4 performs the third closing lid load stroke, the drive powder metering wheel 9 continues to reverse, while the dose protection plate 10 has been reset and no longer reverses. After the drive spring arm 910 on the powder metering wheel 9 crosses the wedge-shaped column 1005 on the dose protection plate 10, the drive spring arm 910 no longer exerts a force on the wedge-shaped column 1005, and under the action of the drive torsion spring 16, the pressing arc surface 1002 of the dose protection plate 10 acts on the arc groove surface 1107 of the intake baffle 11 again to achieve concentric arc surface pressing. Ensure that after the inhalation trigger mechanism is reset, the powder metering wheel 9 is reset, avoiding the situation that the inhalation trigger mechanism is not reset in place.

[0220] During the process of the outer cover 4 being reversed from 62.5 degrees to 8 degrees, it is necessary to simultaneously perform the reverse reset of the drive powder metering wheel 9 and the upward reset process of the airbag pressing member 17. During this process, the outer cover 4 performs the second closing lid load stroke, which requires a relatively large torque, and the torque of the second closing lid load stroke gradually increases. Preferably, within the second closing lid load stroke, the torque of the outer cover 4 gradually increases from 0.10 N·m to 0.20 N·m to ensure that the drive powder metering wheel 9 and the airbag pressing member 17 can be continuously reset. When the outer cover 4 rotates to 8 degrees, the airbag pressing member 17 is reset, that is, the airbag pressing member 17 is reset to the fifth position, and the tip of the convex rod 1704 of the airbag pressing member 17 sinks into the arc-shaped groove 1201 again to limit the airbag pressing member 17. During the process of the outer cover 4 being reversed from 8 degrees to 0 degrees, the outer cover 4 performs the third closing lid load stroke. During this process, it is necessary to overcome the resistance of the powder metering wheel 9 crossing the wedge-shaped column 1005. Preferably, the torque of the outer cover 4 within the third closing lid load stroke is 0.1 N·m until the lid closing is completed.

[0221] Specifically, within the first lid loading stroke and the second lid loading stroke of the outer lid 4, the powder metering wheel 9 drives the dose protection plate 10 to reset beyond the inlet 704 of the inhalation channel 706, compressing the driving torsion spring 16. Meanwhile, the reset torsion spring 15 drives the intake baffle 11 to reset and rotate to close the air flow channel 708. In the third lid loading stroke of the outer lid 4, the powder metering wheel 9 is decoupled from the dose protection plate 10. Specifically, the driving spring arm 910 of the powder metering wheel 9 is decoupled from the wedge column 1005 of the dose protection plate 10, and the driving torsion spring 16 drives the dose protection plate 10 to rotate so that the shielding portion 1004 of the dose protection plate 10 rotates to the inlet 704 of the inhalation channel 706 and is limited at the position of the inlet 704 of the inhalation channel 706 by the intake baffle 11.

[0222] Refer to Figures 26 to 27 , Figure 26 which is a cross-sectional schematic diagram of another embodiment of the powder inhaler provided by the present application, Figure 27 and is a cross-sectional schematic diagram of yet another embodiment of the powder inhaler provided by the present application.

[0223] In Figure 1 the shown powder inhaler, a scheme of adopting a pneumatic mechanism and a large-sized powder outlet 713 is used for powder filling. In this embodiment, refer to Figure 9C and Figure 9D , the cross-sectional area of the powder outlet 713 of the powder container 7 is larger than the cross-sectional area of the dose cup 902 on the powder metering wheel 9. The size of the powder outlet 713 of the powder container 7 is larger, which can more efficiently implement the pneumatic and powder filling processes. In other embodiments, the pneumatic method as shown in Figure 9C may not be adopted.

[0224] For example, as shown in Figure 26 , in another embodiment, a pneumatic mechanism may not be provided in the powder inhaler, and a large-sized powder outlet 713 is directly adopted, such that the cross-sectional area of the powder outlet 713 of the powder container 7 is larger than the cross-sectional area of the dose cup 902 on the powder metering wheel 9. Since in the powder inhaler provided by each embodiment of the present application, during the process of opening and closing the lid, the axis of the housing assembly is always parallel to the vertical direction, during the powder filling process, along the vertical direction, the powder outlet 713 at the bottom of the storage cavity 715 is always directly above the dose cup 902 of the powder metering wheel 9. By directly relying on the gravity of the powder in the storage cavity 715 of the powder container 7, the powder in the powder container 7 can also be filled into the dose cup 902 of the powder metering wheel 9 to achieve powder filling.

[0225] Or, as shown in Figure 27As shown, in another embodiment, a pneumatic mechanism may also be provided in the powder inhaler. However, the powder outlet 713 of the powder container 7 is set as a small-sized powder outlet 713. Specifically, the cross-sectional area of the powder outlet 713 of the powder container 7 is smaller than the cross-sectional area of the dose cup 902 on the powder metering wheel 9. The cross-sectional shape of the powder outlet 713 may be circular or other shapes, and the diameter of the powder outlet 713 is between 1 mm and 3 mm. The powder in the powder container 7 is compacted and filled into the dose cup 902 on the powder metering wheel 9 through the pneumatic mechanism to achieve powder filling. The specific setting method of pneumatic pressing and powder filling can be designed or selected according to needs, and the present application does not limit this.

[0226] The following describes the specific operating state of the powder inhaler during the entire process from opening the cover to closing the cover, that is, when the outer cover 4 rotates from the first position (0 degrees) to the second position (150 degrees), the user inhales, and then the outer cover 4 rotates from the second position (150 degrees) back to the first position (0 degrees).

[0227] (1) Opening the cover process

[0228] During the process of opening the outer cover 4, that is, when the outer cover 4 rotates from the first position (0 degrees) to the second position (150 degrees), it sequentially includes an opening empty stroke, a pneumatic pressing process, and a powder delivery process in chronological order.

[0229] (1) Opening empty stroke

[0230] During the opening empty stroke, the outer cover 4 rotates from 0 degrees to 12 degrees. Among them, the process of the outer cover 4 rotating from 0 degrees to 8 degrees is to prevent the outer cover 4 from being opened by non-human factors, and the process of the outer cover 4 rotating from 8 degrees to 12 degrees is to prevent accidental opening of the cover. When the outer cover 4 is in the first position, that is, 0 degrees, the outer cover 4 covers the nozzle 101.

[0231] (2) Pneumatic pressing process

[0232] During the pneumatic pressing process, the outer cover 4 rotates from 12 degrees to 62.5 degrees. Among them, during the process of the outer cover 4 rotating from 12 degrees to 55 degrees, the pneumatic pressing function is realized, so that the powder in the storage chamber 715 of the powder container 7 is compacted and filled into the dose cup 902 of the powder metering wheel 9. When the outer cover 4 rotates to 55 degrees, the pressure relief hole 1702 and the ventilation hole 709 are at the critical point of connection. During the process of the outer cover 4 rotating from 55 degrees to 62.5 degrees, the pressure relief hole 1702 and the ventilation hole 709 are connected to realize the pressure relief function, releasing the compressed gas in the storage chamber 715 of the powder container 7 to normal pressure to avoid powder leakage when the powder metering wheel 9 rotates. During this process, the outer cover 4 can be instantaneously opened when opening the cover, enabling the pneumatic mechanism to rapidly press air and improving the pneumatic pressing effect.

[0233] (3) Powder delivery process

[0234] During the powder delivery process, the outer cover 4 rotates from 62.5 degrees to 150 degrees. The rotation of the outer cover 4 drives the rotation of the drive cam 12. The annular boss 1207 of the drive cam 12 contacts and cooperates with the boss 905 of the powder metering wheel 9. The drive cam 12 rotates and drives the powder metering wheel 9 to rotate 105 degrees, so that the powder metering wheel 9 rotates from the third position to the fourth position. The dosing cup 902 of the powder metering wheel 9 rotates from corresponding to the powder outlet 713 of the storage cavity 715 of the powder container 7 to a position corresponding to the inlet 704 of the inhalation channel 706. When the outer cover 4 rotates to the second position, the arc-shaped rib 405 on the outer cover 4 cooperates with the sound-emitting spring arm 108 on the front housing 1 to realize the sound prompt for the outer cover 4 to reach the open position, indicating that the outer cover 4 has reached the open position.

[0235] (II) Inhalation triggering process

[0236] After the powder delivery process is completed, the dosing cup 902 of the powder metering wheel 9 is delivered to a position corresponding to the inlet 704 of the inhalation channel 706. The shielding portion 1004 of the dose protection plate 10 covers the dosing cup 902 of the powder metering wheel 9. The outer cover 4 is in the second position (150 degrees), and the outlet 102 of the mouthpiece 101 is exposed. When the user sucks at the position of the outlet 102 of the mouthpiece 101, when the flow rate of the user's inhalation air flow is greater than the working threshold (20 L / min - 25 L / min) and the negative pressure in the inhalation channel 706 is greater than the threshold, the inhalation trigger mechanism is triggered to act. The intake baffle 11 rotates, and the pressing arc surface 1002 of the dose protection plate 10 disengages from the arc groove surface 1107 of the intake baffle 11. The dose protection plate 10 rotates 38 degrees under the driving action of the driving torsion spring 16. The shielding portion 1004 of the dose protection plate 10 deviates and does not cover the dosing cup 902 of the powder metering wheel 9. The dosing cup 902 is exposed at the inlet 704 of the inhalation channel 706. The dosing cup 902 is communicated with the inhalation channel 706, and the powder in the dosing cup 902 is exposed to the user's inhalation air flow and is taken away, completing the inhalation triggering process.

[0237] (III) Closing the cover process

[0238] After the inhalation triggering process is completed, the closing the cover process is carried out. During the closing the cover process, the outer cover 4 reversely resets from the second position (150 degrees) to the first position (0 degrees), and the outer cover 4 drives the air compression mechanism, the powder metering wheel 9, the dose protection plate 10 and the intake baffle 11 to reset during the closing the cover process. Specifically, the closing the cover process includes an empty stroke of closing the cover and a reset process of the functional mechanism.

[0239] (1) Empty stroke of closing the cover

[0240] During the empty stroke of closing the cover, the outer cover 4 rotates reversely from 150 degrees to 87.5 degrees (i.e., the outer cover 4 rotates reversely by 62.5 degrees). Among them, the process of the outer cover 4 rotating from 150 degrees to 140 degrees is to prevent the cover from being closed triggered by non-human factors. In the later stage of the empty stroke of closing the cover, the outer cover 4 rotates from 140 degrees to 87.5 degrees.

[0241] (2) Function mechanism reset process

[0242] During the function mechanism reset process, the outer cover 4 rotates reversely from 87.5 degrees to 0 degrees. During this process, the powder metering wheel 9 rotates continuously in reverse, and the powder metering wheel 9 resets from the fourth position to the third position. Among them, during the process of the outer cover 4 rotating reversely from 87.5 degrees to 62.5 degrees, only the powder metering wheel 9 rotates in reverse; during the process of the outer cover 4 rotating reversely from 62.5 degrees to 8 degrees, the powder metering wheel 9 rotates in reverse, and at the same time the airbag pressing part 17 continuously pushes upwards to reset the air compression mechanism; among them, during the process of the outer cover 4 rotating reversely from 56 degrees to 25 degrees, the driving spring arm 910 on the powder metering wheel 9 cooperates with the wedge-shaped column 1005 of the dose protection plate 10 to drive the dose protection plate 10 to rotate and reset, and the pressing arc surface 1002 of the dose protection plate 10 acts on the arc groove surface 1107 of the air intake baffle 11 again to achieve concentric arc surface pressing, and the air intake trigger mechanism is reset; during the process of the outer cover 4 rotating reversely from 8 degrees to 0 degrees, the air compression mechanism has been reset. At this time, the cover closing stroke overcomes the rotation resistance of the powder metering wheel 9. When the outer cover 4 is in the first position (0 degrees), the powder metering wheel 9 is reset. When the outer cover 4 returns to the first position, the arc-shaped rib 405 on the outer cover 4 cooperates with the sound spring arm 108 on the front housing 1 to realize the sound prompt for the cover being closed in place, indicating that the outer cover 4 is closed in place.

[0243] As can be seen from the above, the outer cover 4 has different functions at different positions during the cover opening and closing process, such as the empty stroke or driving different function mechanisms to operate. According to the different functions of the outer cover 4 at different positions during the cover opening and closing process, the torque of the outer cover 4 during different strokes of the cover opening and closing process is designed in this application, making the cover opening and closing process of the powder inhaler more suitable for the user's usage habits.

[0244] Refer to Figures 28 to 30B , Figure 28 is Figure 1 the cyclic schematic diagram of the cover opening and closing process of the powder inhaler provided, Figure 29A is Figure 1 the curve schematic diagram of the cover opening angle and torque of an embodiment of the cover opening process of the powder inhaler provided, Figure 29B is Figure 1 the curve schematic diagram of the cover closing angle and torque of an embodiment of the cover closing process of the powder inhaler provided, Figure 30A is Figure 1 the curve schematic diagram of the cover opening angle and torque of another embodiment of the cover opening process of the powder inhaler provided,Figure 30B Yes Figure 1 Schematic diagram of the curve of the closing angle and torque of another embodiment of the closing process of the provided powder inhaler.

[0245] (1) Opening process

[0246] Refer to Figure 28 and Figure 29A 、 Figure 29B In some embodiments, the stroke of the outer cover 4 rotating from the first position to the second position (i.e., the opening process) includes an opening idle stroke and an opening load stroke after the opening idle stroke. For example, the stroke of the outer cover 4 rotating from the first position to the second position only includes an opening idle stroke and an opening load stroke after the opening idle stroke.

[0247] During the opening idle stroke, the outer cover 4 does not trigger the action of the functional mechanism. During the opening load stroke, the outer cover 4 triggers the functional mechanism to deliver powder to the inhalation channel 706. Among them, the maximum torque of the outer cover 4 during the opening idle stroke is greater than the maximum torque during the opening load stroke, which can ensure preventing accidental opening due to non-human factors during the opening idle stroke. At the same time, it also ensures fast or stable operation at different stages during the opening load stroke. Preferably, the torque of the outer cover 4 during the opening idle stroke is greater than or equal to 0.05 N·m and less than or equal to 0.3 N·m, and the torque of the outer cover 4 during the opening load stroke is greater than or equal to 0 N·m and less than or equal to 0.15 N·m.

[0248] Define the angle of the outer cover 4 in the first position as 0 degrees, and the angle of the outer cover 4 in the second position is greater than or equal to 120 degrees and less than or equal to 180 degrees. In a preferred embodiment, the angle of the outer cover 4 in the second position is 150 degrees. The critical angle between the opening idle stroke and the opening load stroke is greater than or equal to 10 degrees and less than or equal to 15 degrees. In a preferred embodiment, the critical angle between the opening idle stroke and the opening load stroke is specifically 12 degrees. That is, the outer cover 4 is in the opening idle stroke between 0 degrees and 12 degrees, and the outer cover 4 is in the opening load stroke between 12 degrees and 150 degrees.

[0249] (1) Opening idle stroke

[0250] The opening idle stroke includes a first opening sub-idle stroke and a second opening sub-idle stroke after the first opening sub-idle stroke. The critical angle between the first opening sub-idle stroke and the second opening sub-idle stroke is greater than or equal to 6 degrees and less than or equal to 10 degrees. As Figure 25 shown, in a preferred embodiment, the critical angle between the first opening sub-idle stroke and the second opening sub-idle stroke is 8 degrees. That is, the outer cover 4 is in the first opening sub-idle stroke between 0 degrees and 8 degrees, and the outer cover 4 is in the second opening sub-idle stroke between 8 degrees and 12 degrees.

[0251] Among them, the torque of the outer cover 4 in the first lid-opening idle stroke is greater than or equal to 0.02 N·m and less than or equal to 0.08 N·m, and the torque of the outer cover 4 in the second lid-opening idle stroke is greater than or equal to 0.1 N·m and less than or equal to 0.2 N·m. Preferably, the torque of the outer cover 4 in the first lid-opening idle stroke is 0.05 N·m, that is, the initial torque set between 0 degrees and 8 degrees of the outer cover 4 is 0.05 N·m, which can effectively prevent non-human factors from opening. The torque of the outer cover 4 in the second lid-opening idle stroke is 0.15 N·m, that is, the torque set between 8 degrees and 12 degrees of the outer cover 4 is 0.15 N·m. A relatively large lid-opening resistance is set between 8 degrees and 12 degrees of the outer cover 4 to prevent accidental lid opening.

[0252] (2) Lid-opening load stroke

[0253] The lid-opening load stroke includes the first lid-opening load stroke and the second lid-opening load stroke after the first lid-opening load stroke. The outer cover 4 triggers the air-pressing mechanism to press the powder from the storage cavity 715 into the dosing cup 902 during the first lid-opening load stroke, and the outer cover 4 triggers the dosing cup 902 to deliver the powder to the inhalation channel 706 during the second lid-opening load stroke.

[0254] Among them, the critical angle between the first lid-opening load stroke and the second lid-opening load stroke is greater than or equal to 60 degrees and less than or equal to 65 degrees. In a preferred embodiment, the critical angle between the first lid-opening load stroke and the second lid-opening load stroke is 62.5 degrees. That is, the outer cover 4 is in the first lid-opening load stroke between 12 degrees and 62.5 degrees, and the outer cover 4 is in the second lid-opening load stroke between 62.5 degrees and 150 degrees.

[0255] Among them, the torque of the outer cover 4 is constant during the first lid-opening load stroke, and is greater than or equal to 0 N·m and less than or equal to 0.05 N·m. Preferably, the torque of the outer cover 4 is 0 N·m during the first lid-opening load stroke, that is, the torque set between 12 degrees and 62.5 degrees of the outer cover 4 is 0 N·m. During the air-pressing process in the first lid-opening load stroke, setting the torque within this angle range to 0 N·m can achieve instantaneous opening during lid opening, enabling the air-pressing mechanism to rapidly press air and improving the air-pressing effect.

[0256] The torque of the outer cover 4 is constant during the second lid-opening load stroke, and it is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m. Preferably, the torque of the outer cover 4 is 0.1 N·m during the second lid-opening load stroke, that is, the torque set between 62.5 degrees and 150 degrees of the outer cover 4 is 0.1 N·m. The outer cover 4 performs the powder delivery process during the second lid-opening load stroke. During this stage, the outer cover 4 needs to be opened smoothly and evenly. Setting the torque value in the second lid-opening load stroke to a constant torque of 0.1·m, without sudden torque changes until the lid opening is completed, ensures the powder delivery effect.

[0257] (2) Closing the cover process

[0258] See Figure 28 and Figure 29A 、 Figure 29B , in some embodiments, the stroke of the outer cover 4 rotating from the second position to the first position (i.e., the closing cover process) includes an empty stroke of closing the cover and a load stroke of closing the cover after the empty stroke of closing the cover. Among them, within the load stroke of closing the cover, the outer cover 4 triggers the reset of the functional mechanism.

[0259] Define the angle of the outer cover 4 in the first position as 0 degrees, and the angle of the outer cover 4 in the second position is greater than or equal to 120 degrees and less than or equal to 180 degrees. In a preferred embodiment, the angle of the outer cover 4 in the second position is 150 degrees. In some embodiments, the critical angle between the empty stroke of closing the cover and the load stroke of closing the cover is greater than or equal to 80 degrees and less than or equal to 95 degrees. Preferably, the critical angle between the empty stroke of closing the cover and the load stroke of closing the cover is 87.5 degrees. That is, the outer cover 4 is in the empty stroke of closing the cover from 150 degrees to 87.5 degrees, and the outer cover 4 is in the load stroke of closing the cover from 87.5 degrees to 0 degrees.

[0260] (1) Empty stroke of closing the cover

[0261] The maximum torque of the outer cover 4 within the empty stroke of closing the cover is greater than or equal to 0.03 N·m and less than or equal to 0.07 N·m. Preferably, the maximum torque of the outer cover 4 within the empty stroke of closing the cover can prevent the cover from being closed accidentally due to non-human factors.

[0262] In some embodiments, the empty stroke of closing the cover includes a first sub-empty stroke of closing the cover and a second sub-empty stroke of closing the cover after the first sub-empty stroke of closing the cover. The critical angle between the first sub-empty stroke of closing the cover and the second sub-empty stroke of closing the cover is greater than or equal to 135 degrees and less than or equal to 145 degrees. Preferably, the critical angle between the first sub-empty stroke of closing the cover and the second sub-empty stroke of closing the cover is 140 degrees. That is, the outer cover 4 is in the first sub-empty stroke of closing the cover from 150 degrees to 140 degrees, and the outer cover 4 is in the second sub-empty stroke of closing the cover from 140 degrees to 87.5 degrees.

[0263] Among them, the torque of the outer cover 4 within the first sub-empty stroke of closing the cover is constant, which is greater than or equal to 0.03 N·m and less than or equal to 0.07 N·m. Preferably, the torque of the outer cover 4 within the first sub-empty stroke of closing the cover is 0.05 N·m, that is, the torque of the outer cover 4 from 150 degrees to 140 degrees is 0.05 N·m, which can prevent the cover from being closed accidentally due to non-human factors.

[0264] The torque of the outer cover 4 within the second sub-empty stroke of closing the cover is constant, which is less than or equal to 0.02 N·m. Preferably, the torque of the outer cover 4 within the second sub-empty stroke of closing the cover is 0 N·m, which can accelerate the closing cover process and increase the smoothness of closing the cover.

[0265] (2) Closing cover load stroke

[0266] The maximum torque of the outer cover 4 within the closing cover load stroke is greater than 0.05 N·m and less than or equal to 0.3 N·m. Specifically, the closing cover load stroke includes a first closing cover sub-load stroke, a second closing cover sub-load stroke, and a third closing cover sub-load stroke arranged in chronological order. The outer cover 4 only triggers the powder metering wheel 9 to reset and rotate within the first closing cover sub-load stroke. The outer cover 4 continues to trigger the powder metering wheel 9 to reset and rotate and triggers the air compression mechanism to complete reset within the second closing cover sub-load stroke. The outer cover 4 only triggers the powder metering wheel 9 to reset and rotate within the third closing cover sub-load stroke, and triggers the powder metering wheel 9 to reset and rotate to the first position. The outer cover 4 also triggers the dose protection plate 10 and the air intake baffle 11 to complete reset within the closing cover load stroke.

[0267] The critical angle between the first closing cover sub-load stroke and the second closing cover sub-load stroke is greater than or equal to 60 degrees and less than or equal to 65 degrees. Preferably, the critical angle between the first closing cover sub-load stroke and the second closing cover sub-load stroke is 62.5 degrees. That is, the outer cover 4 is within the first closing cover sub-load stroke from 87.5 degrees to 62.5 degrees. The critical angle between the second closing cover sub-load stroke and the third closing cover sub-load stroke is greater than or equal to 6 degrees and less than or equal to 10 degrees. Preferably, the critical angle between the second closing cover sub-load stroke and the third closing cover sub-load stroke is 8 degrees. That is, the outer cover 4 is within the second closing cover sub-load stroke from 62.5 degrees to 8 degrees, and the outer cover 4 is within the third closing cover sub-load stroke from 8 degrees to 0 degrees.

[0268] Among them, the torque of the outer cover 4 within the first closing cover sub-load stroke is constant, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m. Preferably, the torque of the outer cover 4 within the first closing cover sub-load stroke is 0.1 N·m. That is, the torque of the outer cover 4 from 87.5 degrees to 62.5 degrees is 0.1 N·m, and only the powder metering wheel 9 rotates within the first closing cover sub-load stroke.

[0269] The torque of the outer cover 4 within the second closing cover sub-load stroke gradually increases, and its maximum value is greater than or equal to 0.15 N·m and less than or equal to 0.3 N·m. Preferably, the torque of the outer cover 4 within the second closing cover sub-load stroke gradually increases from 0.10 N·m to 0.20 N·m. That is, the torque of the outer cover 4 from 62.5 degrees to 8 degrees gradually increases from 0.10 N·m to 0.20 N·m. The powder metering wheel 9 still rotates within the second closing cover sub-load stroke, and the airbag pressing part 17 is in the process of continuously resetting by jacking up.

[0270] The torque of the outer cover 4 is constant within the third closing cover load stroke, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m. Preferably, the torque of the outer cover 4 within the third closing cover load stroke is 0.1 N·m, that is, the torque of the outer cover 4 is 0.1 N·m between 8 degrees and 0 degrees. The airbag pressing part 17 has been reset within the third closing cover load stroke. At this time, the closing cover stroke overcomes the rotational resistance of the powder metering wheel 9 until the closing cover is completed.

[0271] See Figure 30A and Figure 30B , in another embodiment, during the opening and closing processes of the outer cover 4 of the powder inhaler, it can also be set according to the corresponding relationship between the opening and closing cover angles and torques as shown in Figure 30A and Figure 30B . In this embodiment, the torque change during the opening and closing processes has a ramp curve, with fewer torque mutations, which is more user-friendly.

[0272] Refer to Figures 31A to 31E , Figure 31A is Figure 1 a schematic bottom view structure diagram of the powder inhaler provided at an angle, Figure 31B is Figure 31A a schematic diagram of the powder inhaler provided in a state placed on a horizontal plane, Figure 31C is Figure 31A a schematic diagram of the powder inhaler provided in a handheld state, Figure 31D is Figure 31A a schematic diagram of the powder inhaler provided after opening the cover in a handheld state, Figure 31E is Figure 31A a schematic diagram of the powder inhaler provided in a mouth-sucking state.

[0273] See Figure 1 , Figure 5A , Figure 5B , Figure 31A and Figure 31B , the outer cover 4 of the powder inhaler includes two connecting parts 406 oppositely arranged along a first direction and a free end 407 located on one side of the two connecting parts 406 along a second direction. The first direction intersects the second direction. The two connecting parts 406 are respectively rotatably connected to opposite sides of the bottom end of the housing assembly and protrude from the bottom end of the housing assembly. The free end 407 and the two connecting parts 406 are used to support the housing assembly, so that the powder inhaler can be stably placed on a horizontal plane. The three support points of the two connecting parts 406 and one free end 407 can achieve stable placement and prevent the powder inhaler from tipping over due to unstable placement.

[0274] The present invention can ensure that during the use and storage of the device, the powder container 7 is always above the powder metering wheel 9, preventing problems such as excessive changes in the device's position state causing frequent movement of the powder in the powder container 7, which may lead to powder variation, for example, the effective components of the powder separating from the carrier, the powder particles becoming smaller, and accumulation at the bottom of the small particles. This ensures that the powder in the powder container 7 remains in a relatively stable state throughout the entire service life cycle of the powder inhaler.

[0275] For example, as Figure 31B shown, when the bottom end of the powder inhaler is placed on a horizontal plane, the inclination angle of the axis of the housing assembly relative to the vertical direction is greater than or equal to 0 degrees and less than or equal to 15 degrees. Preferably, when the bottom end of the powder inhaler is placed on a horizontal plane, the inclination angle of the axis of the housing assembly relative to the vertical direction is 6 degrees, which can further ensure that the change in the device's position state is relatively small, and ensure that the powder in the powder container 7 remains in a relatively stable state when the powder inhaler is placed on a horizontal plane (i.e., in the storage state).

[0276] For example, as Figure 31C and Figure 31D shown, during the process of holding the powder inhaler to open and close the lid, the device is in a vertical state, and the axis of the housing assembly of the powder inhaler is parallel to the vertical direction, which is more convenient for the process of opening and closing the lid, and also makes the change in the device's position state relatively small, ensuring that the powder in the powder container 7 remains in a relatively stable state during the process of opening and closing the lid.

[0277] For example, as Figure 31E shown, during the user's oral inhalation process, the inclination angle of the axis of the housing assembly of the powder inhaler relative to the vertical direction is greater than or equal to 0 degrees and less than or equal to 15 degrees. Preferably, during the user's oral inhalation process, the inclination angle of the axis of the housing assembly of the powder inhaler relative to the vertical direction is 15 degrees, which not only ensures that the change in the position state of the powder inhaler during the oral inhalation process is relatively small and the powder in the powder container 7 remains in a relatively stable state, but also ensures the convenience of the user's suction at the outlet 102 of the mouthpiece 101.

[0278] The above are only embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural or equivalent process transformation made using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present application.

Claims

1. An airbag pressing member for a powder inhaler; characterized in that, the side wall of the airbag pressing member has a pressure relief hole; the airbag pressing member is used to squeeze the air compression airbag.

2. The airbag pressing member according to claim 1, characterized in that, one end of the side wall of the airbag pressing member away from the top wall has a convex rod, and one end of the convex rod away from the top wall has an arc surface.

3. The airbag pressing member according to claim 2, wherein One end of the convex rod away from the top wall has a tip, and the end face of the tip is the arc surface.

4. The airbag pressing member according to claim 2, wherein The arc surface is a circular arc surface.

5. The airbag pressing member according to any one of claims 1-4, characterized in that, the top wall of the airbag pressing member has a fixing hole, and the fixing hole is used to connect the top of the air compression airbag to drive the air compression airbag to expand and contract.

6. A drive cam for a powder inhaler, characterized in that, Comprising: a body part; a gear coaxially connected to the body part for driving the body part to rotate; wherein, one surface of the body part has a guide groove, and the side surface of the guide groove is a cam curved surface.

7. The driving cam according to claim 6, characterized in that, the outer peripheral side surface of the body part has an arc-shaped groove at one end of the cam curved surface.

8. The driving cam according to claim 7, characterized in that, the gear is arranged on one surface of the body part, and the guide groove is arranged on the surface of the body part facing the gear and is spaced from the gear; the cam curved surface includes a first curved surface segment and a second curved surface segment connected to each other, and the second curved surface segment is located at one end of the first curved surface segment away from the arc-shaped groove; the first curved surface segment is a non-circular arc surface, and the second curved surface segment is a circular arc surface and is concentrically arranged with the outer peripheral side surface of the body part.

9. The drive cam according to claim 8, wherein A stop groove is arranged at one end of the second curved surface segment away from the first curved surface segment.

10. The driving cam according to claim 9, characterized in that, the arc-shaped groove and / or the stop groove is a circular arc-shaped groove.

11. The driving cam according to claim 8, characterized in that, the surface of the body part facing away from the gear has a convex rib; one end of the convex rib is arranged corresponding to the end of the second curved surface segment close to the first curved surface segment.

12. The driving cam according to claim 9, characterized in that, the surface of the body part facing away from the gear also has an annular convex platform; the annular convex platform is coaxially arranged with the gear.

13. A gas compression mechanism, characterized in that, Comprising: an air compression airbag; an elastic member; the airbag pressing member according to any one of claims 1-5; and / or the driving cam according to any one of claims 6-12.

14. The air compressor mechanism according to claim 13, characterized in that, The arc surface of the convex rod cooperates with the cam curved surface of the driving cam to realize the reciprocating movement of the airbag pressing member between the fifth position and the sixth position; when the airbag pressing member is configured at the initial position, the tip of the convex rod is embedded in the arc-shaped groove of the cam curved surface to realize the initial positioning of the airbag pressing member.

15. A powder inhaler, characterized in that, Comprising: a powder delivery mechanism, including a powder container; the powder container has a storage cavity, a first end of the storage cavity has a powder outlet, and a second end has a compressed air port; the side wall of the storage cavity has a ventilation hole; the air compression mechanism according to claim 13 or 14; Wherein, the compressed air bag is arranged at the second end of the storage cavity and is connected to the compressed air port; the air bag pressing piece is movably sleeved on the outer side of the compressed air bag and the storage cavity; The driving cam and the elastic member are used to drive the airbag pressure piece to move back and forth between the fifth position and the sixth position, thereby driving the compressed air bag to expand and contract; when the airbag pressure piece is configured to the fifth position, the side wall of the airbag pressure piece blocks the vent hole, and the pressure relief hole is not connected to the vent hole; when the airbag pressure piece is configured to the sixth position, the pressure relief hole is connected to the vent hole to relieve pressure in the storage chamber.

16. The powder inhaler according to claim 15, wherein, The powder inhaler further comprises: A filter membrane is arranged at the second end of the storage cavity; the filter membrane is located at the compressed air port and is spaced apart from the port of the compressed air port; one end of the vent is connected to the space between the filter membrane and the compressed air bag; A housing assembly having a suction nozzle; an outer cover, rotatably connected to the housing assembly and capable of reciprocating between a first position and a second position; when the outer cover is configured to be in the first position, the outer cover covers the suction nozzle; when the outer cover is configured to be in the second position, the suction nozzle is exposed; The powder delivery mechanism further includes a powder metering wheel; the powder container further includes an inhalation channel, the inhalation nozzle is connected to the inhalation channel; the powder metering wheel is rotatably connected to the powder container; the powder metering wheel includes a dosage cup; the powder metering wheel can rotate back and forth between a third position and a fourth position; when the powder metering wheel is configured to the third position, the dosage cup is correspondingly arranged at the powder outlet of the storage chamber for receiving the powder from the powder container; when the powder metering wheel is configured to the fourth position, the dosage cup is correspondingly arranged at the entrance of the inhalation channel; The outer cover is respectively linked with the powder metering wheel and the air compression mechanism; when the outer cover is configured to be in the first position, the airbag pressure piece is limited to the fifth position; during the process of the outer cover rotating from the first position to the second position, the airbag pressure piece is firstly released from the limit, so that the elastic member drives the airbag pressure piece to move from the fifth position to the sixth position, and then drives the powder metering wheel to rotate from the third position to the fourth position; During the process of the outer cover being reversed and reset from the second position to the first position, the powder metering wheel is driven to be reversed and reset, and the airbag pressing piece is driven to move in the opposite direction and reset to the fifth position.

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