Powder inhaler, air inlet baffle, dose protection plate, inhalation trigger mechanism, airbag pressing member, drive cam, and air compressing mechanism

Abstract

A powder inhaler, an air inlet baffle, a dose protection plate, an inhalation trigger mechanism, an airbag pressing member, a drive cam, and an air compressing mechanism are provided. The powder inhaler includes a functional mechanism, a suction nozzle (101), and an outer cap (4). The functional mechanism includes an inhalation channel (706) in communication with the suction nozzle (101). The outer cap (4) is linked to and cooperates with the functional mechanism, and is limited to rotate back and forth between a first position and a second position, where the outer cap blocks the suction nozzle (101) when the outer cap is configured to be at the first position, and the outer cap unblocks the suction nozzle (101) when the outer cap is configured to be at the second position. A stroke of the outer cap (4) rotating from the first position to the second position includes a cap-opening idle stroke and a cap-opening load stroke. The outer cap (4) does not trigger an action of the functional mechanism in the cap-opening idle stroke; and the outer cap (4) triggers, in the cap-opening load stroke, the functional mechanism to deliver powder to the inhalation channel (706). A stroke of resetting from the second position to the first position includes a cap-closing idle stroke and a cap-closing load stroke. The outer cap (4) does not trigger an action of the functional mechanism in the cap-closing idle stroke; and the outer cap (4) triggers, in the cap- closing load stroke, the functional mechanism to reset. Through the foregoing setting, linkage between mechanisms is implemented.

Description

Powder inhaler, air intake baffle, dose protection plate, inhalation trigger mechanism, air bag pressure piece, drive cam, air compression mechanism

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority based on Chinese patent applications 202410051869.2, 202410055013.2, 202410051884.7 and 202410051892.1 filed on January 12, 2024, and all of their contents are incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of inhalation devices, and in particular to a powder inhaler, an air intake baffle, a dose protection plate, an inhalation trigger mechanism, an air bag pressing piece, a driving cam and an air compression mechanism. Background Art

[0004] A powder inhaler generally comprises a housing assembly and various functional mechanisms, and distributes powdered pharmaceutical preparations by air inhalation, so as to inhale the powder from the powder metering component into the mouthpiece for the user to inhale.

[0005] However, due to structural limitations, existing powder inhalers are unable to effectively achieve the linkage of various systems of the device during the opening and closing of the lid. There are also problems such as complex powder delivery methods, uncontrollable delivery amounts, and easy waste of powder. The protection of powders such as medicine powder cannot be guaranteed when the airflow is inhaled at a low speed. During the user's inhalation process, the airflow has a poor effect on deagglomerating the medicine powder, resulting in low utilization of the medicine powder and easy waste of medicine powder. Summary of the Invention

[0006] The present application mainly provides a powder inhaler, an air intake baffle, a dose protection plate, an inhalation trigger mechanism, an air bag pressure piece, a drive cam and an air compression mechanism, so as to solve the problem in the prior art that the various mechanisms of the device cannot achieve good linkage during the opening and closing process of the powder inhaler cover.

[0007] In order to solve the above technical problems, a technical solution adopted in this application is to provide a powder inhaler, comprising:

[0008] Functional mechanisms, including suction channels;

[0009] a suction nozzle, connected to the suction channel;

[0010] an outer cover, which cooperates with the functional mechanism and is limited to rotate back and forth between a first position and a second position; when the outer cover is configured in the first position, the outer cover covers the suction nozzle; when the outer cover is configured in the second position, the outer cover does not cover the suction nozzle;

[0011] wherein the stroke of the outer cover rotating from the first position to the second position includes an open-cover idle stroke and an open-cover loaded stroke following the open-cover idle stroke; within the open-cover idle stroke, the outer cover does not trigger the action of the functional mechanism; within the open-cover loaded stroke, the outer cover triggers the functional mechanism to deliver powder to the inhalation channel; and / or

[0012] The stroke of the outer cover rotating from the second position to the first position includes a cover-closing idle stroke and a cover-closing load stroke after the cover-closing idle stroke; within the cover-closing idle stroke, the outer cover does not trigger the action of the functional mechanism; within the cover-closing load stroke, the outer cover triggers the functional mechanism to reset.

[0013] The lid opening idle stroke includes a first lid opening idle stroke and a second lid opening idle stroke following the first lid opening idle stroke; wherein the torque in the second lid opening idle stroke is greater than the torque in the first lid opening idle stroke;

[0014] Preferably, the torque increases gradually or suddenly during the process of switching from the first lid opening idle stroke to the second lid opening idle stroke.

[0015] Wherein, the lid opening load stroke includes a first lid opening load stroke and a second lid opening load stroke following the first lid opening load stroke;

[0016] The torque of the first lid opening load stroke is smaller than the torque of the second lid opening load stroke and / or the lid opening idle stroke.

[0017] Wherein, the cover closing idle stroke includes a first cover closing idle stroke and a second cover closing idle stroke following the first cover closing idle stroke;

[0018] Wherein, the torque of the first closing lid idle stroke is greater than the second closing lid idle stroke;

[0019] Preferably, the torque within the idle stroke of the first closing lid is constant or gradually increases.

[0020] The lid closing load stroke includes a first lid closing load stroke, a second lid closing load stroke and a third lid closing load stroke arranged in chronological order;

[0021] Wherein, the torque of the second lid load stroke is greater than the torque of the first lid load stroke and / or the third lid load stroke;

[0022] Preferably, the torque of the load stroke of the third door cover is greater than or equal to the torque of the load stroke of the first door cover;

[0023] Preferably, the torque of the second closing cover load stroke and / or the first closing cover load stroke increases gradually.

[0024] Wherein, the functional mechanism includes: an air compression mechanism;

[0025] A powder delivery mechanism includes a storage chamber and a dosage cup; the storage chamber is used to store powder and has a powder outlet; the lid opening loading stroke includes a first lid opening loading stroke and a second lid opening loading stroke following the first lid opening loading stroke; the outer cover triggers the air compression mechanism to press the powder from the storage chamber into the dosage cup during the first lid opening loading stroke; and the outer cover drives the dosage cup to deliver the powder to the inhalation channel during the second lid opening loading stroke.

[0026] wherein the delivery mechanism comprises a powder container and a powder metering wheel; the powder container has an inhalation channel and the storage chamber; the powder metering wheel is rotatably connected to the powder container; the powder metering wheel comprises the dosage cup;

[0027] The outer cover triggers the air compression mechanism within the first lid opening load stroke to first compress air into the powder container and then relieve pressure in the powder container;

[0028] In which, the powder metering wheel is capable of rotating 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 with 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 with the entrance of the inhalation channel; the outer cover drives the dosage cup to rotate from the third position to the fourth position within the second lid opening load stroke.

[0029] The powder inhaler further comprises: an inhalation trigger mechanism, comprising a dose protection plate, an air intake baffle, a return torsion spring, and a drive torsion spring that cooperate with each other; the return torsion spring limits the air intake baffle to the air flow channel; the dose protection plate is limited by the air intake baffle to the entrance of the inhalation channel and blocks the dose cup;

[0030] The outer cover squeezes the return torsion spring within the second cover opening load stroke, thereby releasing the limit of the return torsion spring on the air intake baffle;

[0031] When the negative pressure of the airflow channel is greater than a threshold, the air inlet baffle rotates under the action of the airflow to release the limit on the dose protection plate, and the dose protection plate rotates and deviates under the action of the driving torsion spring without blocking the dose cup of the powder metering wheel.

[0032] Wherein, the functional mechanism includes: an air compression mechanism;

[0033] A powder delivery mechanism comprises a powder container and a powder metering wheel; the powder container has a storage cavity for storing powder; the powder metering wheel is rotatably connected to the powder container;

[0034] In which, the cover-closing load stroke includes a first cover-closing load stroke, a second cover-closing load stroke and a third cover-closing load stroke arranged in chronological order; the outer cover only triggers the powder metering wheel to reset and rotate within the first cover-closing load stroke; the outer cover continues to trigger the powder metering wheel to reset and rotate within the second cover-closing load stroke and triggers the air compression mechanism to complete the reset; the outer cover only triggers the powder metering wheel to reset and rotate within the third cover-closing load stroke, and triggers the powder metering wheel to reset and rotate to the first position.

[0035] The powder inhaler further comprises: an inhalation trigger mechanism, comprising a dose protection plate, an air intake baffle, a return torsion spring, and a drive torsion spring that cooperate with each other; the return torsion spring limits the air intake baffle to the air flow channel; the dose protection plate is limited by the air intake baffle to the entrance of the inhalation channel and blocks the dose cup;

[0036] The outer cover squeezes the return torsion spring within the cover opening load stroke, releasing the limit of the return torsion spring on the air intake baffle;

[0037] When the negative pressure of the air flow channel is greater than a threshold value, the air inlet baffle rotates under the action of the air flow to open the air flow channel and release the restriction on the dose protection plate. The dose protection plate rotates and deviates under the action of the driving torsion spring so as not to block the dose cup of the powder metering wheel.

[0038] Furthermore, the outer cover also triggers the dose protection plate and the air intake baffle to reset within the cover closing load stroke.

[0039] wherein, within the first cover-closing load stroke and the second cover-closing load stroke, the outer cover drives the dose protection plate to return to a position beyond the inlet of the inhalation channel via the powder metering wheel and compresses the driving torsion spring; and simultaneously, the return torsion spring drives the air intake baffle to return and rotate and close the airflow channel;

[0040] When the outer cover is in the third cover load stroke, the powder metering wheel is decoupled from the dose protection plate, and the drive torsion spring drives the dose protection plate to rotate to the entrance of the intake channel and is limited by the air intake baffle at the entrance of the intake channel.

[0041] The angle of the outer cover when in the first position is defined as 0 degrees, and the angle of the outer cover when in the second position is greater than or equal to 120 degrees and less than or equal to 180 degrees;

[0042] Preferably, the angle of the outer cover when in the second position is 150 degrees;

[0043] The critical angle between the cover opening idle stroke and the cover opening load stroke is greater than or equal to 10 degrees and less than or equal to 15 degrees; and / or, the torque of the outer cover in the cover 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 in the cover opening load stroke is greater than or equal to 0 N·m and less than or equal to 0.15 N·m; and / or,

[0044] The lid opening idle stroke includes a first lid opening idle stroke and a second lid opening idle stroke following the first lid opening idle stroke; a critical angle between the first lid opening idle stroke and the second lid opening idle stroke is greater than or equal to 6 degrees and less than or equal to 10 degrees; and / or, the torque of the outer cover 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 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; and / or,

[0045] The cover-opening load stroke includes a first cover-opening load stroke and a second cover-opening load stroke following the first cover-opening load stroke; a critical angle between the first cover-opening load stroke and the second cover-opening load stroke is greater than or equal to 60 degrees and less than or equal to 65 degrees; and / or, the torque of the outer cover within the first cover-opening load stroke is constant, which is greater than or equal to 0 N·m and less than or equal to 0.05 N·m; the torque of the outer cover within the second cover-opening load stroke is constant, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m; and / or,

[0046] The critical angle between the lid-closing idle stroke and the lid-closing load stroke is greater than or equal to 80 degrees and less than or equal to 95 degrees; and / or, the maximum torque of the outer cover within the lid-closing idle stroke is greater than or equal to 0.03 N·m and less than or equal to 0.07 N·m; the maximum torque of the outer cover within the lid-closing load stroke is greater than or equal to 0.05 N·m and less than or equal to 0.3 N·m; and / or,

[0047] The lid closing idle stroke includes a first lid closing idle stroke and a second lid closing idle stroke following the first lid closing idle stroke; a critical angle between the first lid closing idle stroke and the second lid closing idle stroke is greater than or equal to 135 degrees and less than or equal to 145 degrees; and / or, the torque of the outer cover within the first lid closing idle stroke is constant, which is greater than or equal to 0.03 N·m and less than or equal to 0.07 N·m; the torque of the outer cover within the second lid closing idle stroke is constant, which is less than or equal to 0.02 N·m; and / or,

[0048] The closing cover load stroke includes a first closing cover load stroke, a second closing cover load stroke and a third closing cover load stroke arranged in chronological order; a critical angle between the first closing cover load stroke and the second closing cover load stroke is greater than or equal to 60 degrees and less than or equal to 65 degrees; a critical angle between the second closing cover load stroke and the third closing cover load stroke is greater than or equal to 6 degrees and less than or equal to 10 degrees; and / or, the torque of the outer cover within the first closing cover 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; the torque of the outer cover within the second closing cover 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; the torque of the outer cover within the third closing cover 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.

[0049] In order to solve the above technical problems, a technical solution adopted by the present application is to provide an air intake baffle for a powder inhaler, comprising:

[0050] baffle body;

[0051] The first surface of the baffle body has a boss, and the outer peripheral side surface of the boss is spaced apart from the outer peripheral side surface of the baffle body.

[0052] Wherein, the boss covers the central area of ​​the first surface of the baffle body.

[0053] Wherein, along the circumference of the boss, the outer peripheral side surface of the boss and the outer peripheral side surface of the baffle body are evenly spaced apart; the portion of the first surface of the baffle body not covered by the boss forms an annular surface.

[0054] Wherein, the air inlet baffle further includes a rotating shaft, which is arranged at the first end of the baffle body;

[0055] The height of the boss gradually decreases along a direction from the first end to the opposite second end of the baffle body, so that the top surface of the boss forms an inclined surface.

[0056] Wherein, the baffle body is recessed to form the boss.

[0057] Wherein, the air intake baffle further includes a rotating shaft and a rotating member; the rotating shaft is arranged at one end of the baffle body; the rotating member is connected to the free end of the rotating shaft and is spaced apart from the baffle body;

[0058] Wherein, the first end of the rotating member has a curved surface.

[0059] Wherein, the second end of the rotating member has a protruding cylinder on a surface away from the baffle body.

[0060] There are two rotating shafts, which are respectively provided on opposite sides of the baffle body and are defined as a first rotating shaft and a second rotating shaft; there are two rotating members, which are defined as a first rotating member and a second rotating member;

[0061] The first rotating member is connected to the free end of the first rotating shaft, the first end of the first rotating member has a first curved surface, and the second end of the first rotating member has a surface away from the baffle body having the protruding cylinder;

[0062] The second rotating member is connected to the free end of the second rotating shaft. The first end of the second rotating member has a second curved surface, and the second end has an arc groove surface.

[0063] There are two rotating shafts, which are respectively arranged on opposite sides of the baffle body; one end of each rotating shaft is connected to the side surface of the baffle body;

[0064] The side surface of the baffle body further has a boss surrounding the rotating shaft, and the boss is spaced apart from the rotating member.

[0065] To solve the above technical problems, another technical solution adopted by the present application is to provide a dose protection plate for a powder inhaler, comprising:

[0066] annular body;

[0067] The shielding portion is connected to one end of the annular body and is used to shield or not shield the dosage cup of the powder inhaler.

[0068] Wherein, the dose protection plate further includes a pressing member, and the pressing member is arranged on the outer side surface of the annular body; the surface of the pressing member away from the annular body includes a pressing arc surface.

[0069] Wherein, the pressing member includes a cylindrical convex surface, and the cylindrical convex surface is arranged on one side of the pressing arc surface.

[0070] Wherein, the dose protection plate further includes an elastic arm hook, one end of which is connected to the annular body.

[0071] Wherein, the dose protection plate further includes a wedge-shaped column, one end of which is connected to the annular body.

[0072] In order to solve the above technical problems, another technical solution adopted by the present application is to provide an inhalation trigger mechanism, comprising:

[0073] Any of the air inlet baffles described above; and / or

[0074] Any dose protection plate as described above.

[0075] In order to solve the above technical problems, another technical solution adopted by the present application is to provide a powder inhaler, comprising:

[0076] A powder delivery mechanism includes a powder container and a powder metering wheel; the powder container has a storage chamber, an inhalation channel, and an airflow channel; the inhalation channel is connected to the airflow channel; the storage chamber is used to store powder and has a powder outlet; the powder metering wheel is rotatably connected to the powder container; the powder metering wheel includes a dosage cup; the dosage cup is used to receive the powder from the powder outlet and deliver the powder to the inlet of the inhalation channel;

[0077] The inhalation trigger mechanism as described above; wherein the air inlet baffle is rotatably connected to the side wall of the air flow channel, and the first surface of the baffle body faces outward from the port of the air flow channel; the dose protection plate is rotatably connected to the powder container; the air inlet baffle and the dose protection plate are in coordinated cooperation;

[0078] When the air inhalation trigger mechanism is in the initial state, the air inlet baffle blocks the air flow channel, and the air inhalation channel is not connected to the outside atmosphere; the shielding portion shields the powder outlet of the dosage cup located at the entrance of the air inhalation channel;

[0079] When the negative pressure inside the suction channel is greater than a threshold value, the air inlet baffle rotates to open the airflow channel and triggers the dose protection plate to rotate, so that the shielding portion deviates and does not block the powder outlet of the dose cup, and the airflow channel connects the outside atmosphere and the suction channel.

[0080] Wherein, the powder inhaler further comprises:

[0081] The housing assembly includes a front housing having a suction nozzle, the suction nozzle being arranged corresponding to the suction channel and being connected to the suction channel; a side wall of the front housing having an air inlet and a grille, the grille protruding from the outer wall of the front housing; an inner wall of the front housing having an annular flange surrounding the air inlet, one end of the annular flange being arranged in the air flow channel, and the side wall of the front housing blocking the port of the air flow channel;

[0082] The air intake baffle has the annular surface; when the air intake trigger mechanism is in the initial state, the boss is embedded in the annular flange, the inner peripheral side surface of the annular flange and the outer peripheral side surface of the boss are spaced apart and cooperate to form a first flow channel section, the end surface of the annular flange away from the front housing abuts against the annular surface and cooperates to form a second flow channel section, the first flow channel section and the second flow channel section form an L-shaped intake air channel; the pressing arc surface cooperates with the arc groove surface of the air intake baffle to achieve concentric arc surface compression;

[0083] When the negative pressure inside the suction channel is greater than a threshold value, the air intake baffle rotates to open the air flow channel, and the air flow channel is connected to the outside atmosphere through the air intake.

[0084] Wherein, the ratio of the distance between the top surface of the boss and the first surface of the baffle body to the thickness of the annular flange is 1:2-7:1.

[0085] The side wall of the front housing is provided with at least two air inlets and at least one grille, and the grilles and the air inlets are arranged alternately; the annular flange is arranged around the air inlets and the grilles;

[0086] The side wall of the air flow channel is connected to the side wall of the storage chamber, and one end of the side wall of the air flow channel connected to the side wall of the storage chamber is provided with a first air guide hole and a second air guide hole spaced apart from each other; the end of the suction channel close to the suction nozzle has a first air flow inlet and a second air flow inlet spaced apart from each other, the first air guide hole connecting the air flow channel and the first air flow inlet, and the second guide hole connecting the air flow channel and the second air flow inlet;

[0087] The inner wall surface of the front shell and the outer wall surface of the suction channel are spaced apart to form a guide channel, and the guide channel connects the airflow channel with the first airflow inlet and the second airflow inlet.

[0088] Wherein, the powder inhaler further comprises:

[0089] an outer cover rotatably connected to the housing assembly and capable of rotating back and forth between a first position and a second position; when the outer cover is configured in the first position, the outer cover covers the suction nozzle and the air inlet; when the outer cover is configured in the second position, the suction nozzle and the air inlet are exposed;

[0090] an air compression mechanism, provided on the powder container, for pressing the powder in the powder container into the dosage cup;

[0091] The powder metering wheel is capable of rotating back and forth between a third position and a fourth position; when the powder metering wheel is configured in the third position, the dosage cup is disposed correspondingly to the powder outlet of the storage chamber; when the powder metering wheel is configured in the fourth position, the dosage cup is disposed correspondingly to the entrance of the inhalation channel;

[0092] The outer cover is respectively linked with the powder delivery mechanism and the air compression mechanism; when the outer cover rotates from the first position to the second position, the air compression mechanism is first driven to press the powder in the storage chamber into the dosage cup, and then the powder metering wheel is driven to rotate from the third position to the fourth position;

[0093] During the process of the outer cover being reversed and reset from the second position to the first position, the powder metering wheel, the dose protection plate and the air compression mechanism are respectively driven to reset, and the air intake baffle is triggered to reverse and reset.

[0094] To solve the above technical problems, a technical solution adopted in this application is: providing an airbag pressing piece for a powder inhaler; the side wall of the airbag pressing piece has a pressure relief hole; the airbag pressing piece is used to squeeze the compressed airbag.

[0095] Wherein, one end of the side wall of the airbag pressure piece away from the top wall has a protruding rod, and the other end of the protruding rod away from the top wall has a curved surface.

[0096] Wherein, one end of the protruding rod away from the top wall has a tip, and the end surface of the tip is the arc surface.

[0097] Wherein, the arc surface is a circular arc surface.

[0098] Wherein, the top wall of the airbag pressing piece has a fixing hole, and the fixing hole is used to connect the top of the compressed airbag to drive the compressed airbag to expand and contract.

[0099] To solve the above technical problems, another technical solution adopted by the present application is to provide a driving cam for a powder inhaler, comprising:

[0100] Body part;

[0101] a gear, coaxially connected to the main body, and configured to drive the main body to rotate;

[0102] Wherein, a surface of the main body is provided with a guide groove, and a side surface of the guide groove is a cam curved surface.

[0103] Wherein, the outer peripheral side surface of the main body has an arc-shaped groove located at one end of the cam curved surface.

[0104] The gear is disposed on a surface of the main body, and the guide groove is disposed on a surface of the main body facing the gear and spaced apart from the gear.

[0105] The cam 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 an end of the first curved surface segment away from the arc-shaped groove; the first curved surface segment is a non-circular surface, and the second curved surface segment is a circular surface and is concentrically arranged with the outer peripheral side surface of the main body.

[0106] Wherein, a stop groove is provided at one end of the second curved surface segment away from the first curved surface segment.

[0107] Wherein, the arc-shaped groove and / or the stop groove are / is an arc-shaped groove.

[0108] The surface of the main body 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.

[0109] Wherein, the surface of the main body away from the gear further has an annular boss; the annular boss is coaxially arranged with the gear.

[0110] In order to solve the above technical problems, another technical solution adopted by the present application is to provide an air compression mechanism, comprising:

[0111] compressed air bag;

[0112] elastic parts;

[0113] Any of the airbag pressing pieces described above; and / or

[0114] Any of the drive cams described above.

[0115] 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 piece between the fifth position and the sixth position;

[0116] When the airbag pressing piece is configured to be in the initial position, the tip of the convex rod is embedded in the arc-shaped groove of the cam curved surface to achieve the initial positioning of the airbag pressing piece.

[0117] In order to solve the above technical problems, another technical solution adopted by the present application is to provide a powder inhaler, comprising:

[0118] A powder delivery mechanism includes a powder container; the powder container has a storage cavity, a first end of the storage cavity has a powder outlet, a second end of the storage cavity has a compressed air port; a side wall of the storage cavity has a vent;

[0119] The air compression mechanism as described above;

[0120] 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 outside of the compressed air bag and the storage cavity;

[0121] The driving cam and the elastic member are used to drive the airbag pressure member to move back and forth between the fifth position and the sixth position, thereby driving the compressed airbag to expand and contract; when the airbag pressure member is configured to the fifth position, the side wall of the airbag pressure member blocks the vent hole, and the pressure relief hole is not connected to the vent hole; when the airbag pressure member is configured to the sixth position, the pressure relief hole is connected to the vent hole, thereby relieving pressure in the storage chamber.

[0122] Wherein, the powder inhaler further comprises:

[0123] A filter membrane is provided at the second end of the storage cavity; the filter membrane is located at the air pressure port and is spaced apart from the port of the air pressure port; one end of the vent is connected to the space between the filter membrane and the air pressure bag;

[0124] a housing assembly having a suction nozzle;

[0125] an outer cover rotatably connected to the housing assembly and capable of rotating back and forth between a first position and a second position; when the outer cover is configured in the first position, the outer cover covers the suction nozzle; when the outer cover is configured in the second position, the suction nozzle is exposed;

[0126] The powder delivery mechanism further includes a powder metering wheel; the powder container further includes an inhalation channel, the inhalation nozzle being in communication with 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 is capable of rotating 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 disposed correspondingly to 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 disposed correspondingly to the inlet of the inhalation channel;

[0127] wherein 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;

[0128] 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.

[0129] The beneficial effects of the present application are as follows: Different from the prior art, the present application discloses a powder inhaler, an air inlet baffle, a dose protection plate, an inhalation trigger mechanism, an air bag pressure piece, a drive cam, and an air compression mechanism. The powder inhaler includes a functional mechanism, a mouthpiece, and an outer cover. The functional mechanism includes an inhalation channel; the mouthpiece is connected to the inhalation channel; the outer cover cooperates with the functional mechanism and is limited to rotate back and forth between a first position and a second position; when the outer cover is configured in the first position, it blocks the mouthpiece, and when the outer cover is configured in the second position, it does not block the mouthpiece. The outer cover rotates from the first position to the second position, including a lid-opening idle stroke and a lid-opening loaded stroke following the lid-opening idle stroke; during the lid-opening idle stroke, the outer cover does not trigger the operation of the functional mechanism; during the lid-opening loaded stroke, the outer cover triggers the functional mechanism to deliver powder to the inhalation channel; and / or, the outer cover rotates from the second position to the first position, including a lid-closing idle stroke and a lid-closing loaded stroke following the lid-closing idle stroke; during the lid-closing idle stroke, the outer cover does not trigger the operation of the functional mechanism, and during the lid-closing loaded stroke, the outer cover triggers the functional mechanism to reset. Through the above arrangement, the powder inhaler achieves good linkage between the various functional mechanisms during the lid opening and closing process, thereby improving the performance of the powder inhaler. BRIEF DESCRIPTION OF THE DRAWINGS

[0130] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0131] FIG1 is a schematic structural diagram of a powder inhaler provided in an embodiment of the present application in an unopened state;

[0132] FIG2 is a schematic structural diagram of the powder inhaler provided in FIG1 in an open cover state;

[0133] FIG3 is a schematic structural diagram of the powder inhaler provided in FIG1 in another open cover state;

[0134] FIG4 is a schematic structural diagram of the powder inhaler provided in FIG3 at another angle;

[0135] FIG5A is a schematic structural diagram of the outer cover of the powder inhaler provided in FIG1 at an angle;

[0136] FIG5B is a schematic structural diagram of the outer cover provided in FIG5A at another angle;

[0137] FIG6A is a schematic structural diagram of the powder inhaler provided in FIG1 with the outer cover removed at an angle;

[0138] FIG6B is a schematic structural diagram of the powder inhaler provided in FIG1 with the outer cover removed from another angle;

[0139] FIG7A is a schematic structural diagram of the powder inhaler provided in FIG2 at another angle;

[0140] FIG7B is a partially enlarged schematic diagram of the powder inhaler provided in FIG7A ;

[0141] FIG8A is a schematic structural diagram of the powder inhaler provided in FIG1 with the outer cover removed;

[0142] FIG8B is a partially enlarged schematic diagram of the powder inhaler provided in FIG8A ;

[0143] FIG9A is a cross-sectional schematic diagram of the powder inhaler provided in FIG1 in a state with the outer cover removed;

[0144] FIG9B is a cross-sectional schematic diagram of the powder inhaler provided in FIG1 in another state after the outer cover is removed;

[0145] FIG9C is a cross-sectional view of the powder inhaler provided in FIG1 with the outer cover removed, taken from another angle in a first state;

[0146] FIG9D is a cross-sectional schematic diagram of the powder inhaler provided in FIG1 with the outer cover removed in another state at another angle;

[0147] FIG9E is a partial enlarged schematic diagram of area A in FIG9C ;

[0148] FIG9F is a partial enlarged schematic diagram of area A in FIG9D ;

[0149] FIG9G is a partial enlarged schematic diagram of area B in FIG9C ;

[0150] FIG9H is a schematic structural diagram of an L-shaped inlet flow channel of the powder inhaler provided in FIG9C ;

[0151] FIG10A is a schematic structural diagram of the driving cam of the powder inhaler provided in FIG1 at an angle;

[0152] FIG10B is a schematic structural diagram of the driving cam provided in FIG10A at another angle;

[0153] FIG10C is a schematic structural diagram of the driving cam provided in FIG10A at another angle,

[0154] FIG11 is a schematic structural diagram of the air bag pressing member of the powder inhaler provided in FIG1 ;

[0155] 12A is a schematic structural diagram of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided in FIG. 1 when the powder metering wheel is in a third position in the powder container;

[0156] 12B is a schematic structural diagram of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided in FIG. 1 when the powder metering wheel is in the fourth position in the powder container;

[0157] FIG13A is a schematic structural diagram of a powder container of the powder inhaler provided in FIG1 at an angle;

[0158] FIG13B is a schematic structural diagram of the powder container provided in FIG13A at another angle;

[0159] FIG14A is a schematic diagram of the structure of the powder metering wheel of the powder inhaler provided in FIG1 at an angle;

[0160] FIG14B is a schematic structural diagram of the powder metering wheel provided in FIG14A at another angle;

[0161] FIG15A is a schematic structural diagram of the inhalation trigger device of the powder inhaler provided in FIG1 when it is in one state on the powder container;

[0162] FIG15B is a schematic structural diagram of the inhalation trigger device provided in FIG15A when it is in another state on the powder container;

[0163] FIG16A is a schematic structural diagram of the inhalation trigger device provided in FIG15A with the powder container removed;

[0164] FIG16B is a schematic structural diagram of the inhalation trigger device provided in FIG15B with the powder container removed;

[0165] FIG17A is a schematic structural diagram of the inhalation triggering device provided in FIG16A from another angle;

[0166] FIG17B is a schematic structural diagram of the inhalation triggering device provided in FIG16B from another angle;

[0167] FIG18A is an exploded structural schematic diagram of the counting mechanism of the powder inhaler provided in FIG1 ;

[0168] FIG18B is a schematic diagram of the assembly structure of the counting mechanism provided in FIG18A;

[0169] FIG19A is a schematic structural diagram of the counter base of the counting mechanism provided in FIG18A at an angle;

[0170] FIG19B is a schematic structural diagram of the counter base provided in FIG19A at another angle;

[0171] FIG20 is a schematic structural diagram of a dose protection plate of an inhalation trigger device of the powder inhaler provided in FIG1 ;

[0172] FIG21A is a schematic cross-sectional view of the powder metering wheel and the dose protection plate of the powder inhaler provided in FIG1 when assembled in one state;

[0173] 21B is a schematic cross-sectional view of the powder metering wheel and the dose protection plate of the powder inhaler provided in FIG. 1 in another state;

[0174] FIG21C is a partial enlarged schematic diagram of FIG21A;

[0175] FIG21D is a partial enlarged schematic diagram of FIG21B ;

[0176] 21E is a schematic cross-sectional view of the powder metering wheel and the dose protection plate of the powder inhaler provided in FIG1 in another state;

[0177] FIG21F is a partial enlarged schematic diagram of FIG21E;

[0178] FIG22A is a schematic structural diagram of an air inlet baffle of the inhalation trigger device of the powder inhaler provided in FIG1 at an angle;

[0179] FIG22B is a schematic structural diagram of the air intake baffle provided in FIG21A at another angle;

[0180] FIG22C is a schematic structural diagram of the air intake baffle provided in FIG22A at another angle;

[0181] FIG23A is a schematic structural diagram of the front housing of the powder inhaler provided in FIG1 at an angle;

[0182] FIG23B is a schematic structural diagram of the front housing of the powder inhaler provided in FIG1 at another angle;

[0183] FIG24A is a schematic structural diagram of the units digit wheel of the counting mechanism provided in FIG18A at an angle;

[0184] FIG24B is a schematic structural diagram of the units digit wheel provided in FIG24A at another angle;

[0185] FIG25 is a schematic structural diagram of the tens digit wheel of the counting mechanism provided in FIG18A;

[0186] FIG26 is a cross-sectional schematic diagram of another embodiment of the powder inhaler provided by the present application;

[0187] FIG27 is a cross-sectional schematic diagram of another embodiment of the powder inhaler provided by the present application;

[0188] FIG28 is a schematic diagram of a cycle of the opening and closing cover process of the powder inhaler provided in FIG1 ;

[0189] FIG29A is a schematic diagram of a curve showing the opening angle and torque of an embodiment of the opening process of the powder inhaler provided in FIG1 ;

[0190] FIG29B is a schematic diagram of a curve showing the closing angle and torque of the cover during the closing process of the powder inhaler provided in FIG1 ;

[0191] FIG30A is a schematic diagram of a curve showing the opening angle and torque of another embodiment of the opening process of the powder inhaler provided in FIG1 ;

[0192] FIG30B is a schematic diagram of a curve showing the closing angle and torque of another embodiment of the closing process of the powder inhaler provided in FIG1 ;

[0193] FIG31A is a schematic diagram of the powder inhaler provided in FIG1 viewed from below at an angle;

[0194] FIG31B is a schematic diagram of the powder inhaler provided in FIG31A when placed on a horizontal surface;

[0195] FIG31C is a schematic diagram of the powder inhaler provided in FIG31A in a handheld state;

[0196] FIG31D is a schematic diagram of the powder inhaler provided in FIG31A with the cover opened in a handheld state;

[0197] FIG31E is a schematic diagram of the powder inhaler provided in FIG31A in the oral inhalation state. DETAILED DESCRIPTION

[0198] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0199] The terms "first", "second" and "third" in the embodiments of the present application are only used for descriptive purposes and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second" and "third" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally also include steps or units that are not listed, or may optionally also include other steps or units inherent to these processes, methods, products or devices.

[0200] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0201] 1 to 11 , FIG1 is a schematic structural diagram of a powder inhaler provided in an embodiment of the present application in an unopened state, FIG2 is a schematic structural diagram of the powder inhaler provided in FIG1 in an open state, FIG3 is a schematic structural diagram of the powder inhaler provided in FIG1 in another open state, FIG4 is a schematic structural diagram of the powder inhaler provided in FIG3 at another angle, FIG5A is a schematic structural diagram of the outer cover of the powder inhaler provided in FIG1 at an angle, FIG5B is a schematic structural diagram of the outer cover provided in FIG5A at another angle, FIG6A is a schematic structural diagram of the powder inhaler provided in FIG1 after removing the outer cover at an angle, FIG6B is a schematic structural diagram of the powder inhaler provided in FIG1 after removing the outer cover at another angle, FIG7A is a schematic structural diagram of the powder inhaler provided in FIG2 at another angle, FIG7B is a partially enlarged schematic diagram of the powder inhaler provided in FIG7A, FIG8A is a schematic structural diagram of the powder inhaler provided in FIG1 after removing the outer cover, FIG8B is a partially enlarged schematic diagram of the powder inhaler provided in FIG8A, FIG 9A is a schematic cross-sectional view of the powder inhaler provided in FIG1 after removing the outer cover in one state, FIG9B is a schematic cross-sectional view of the powder inhaler provided in FIG1 after removing the outer cover in another state, FIG9C is a schematic cross-sectional view of the powder inhaler provided in FIG1 after removing the outer cover in one state at another angle, FIG9D is a schematic cross-sectional view of the powder inhaler provided in FIG1 after removing the outer cover in another state at another angle, FIG9E is a partially enlarged schematic view of region A of FIG9C, FIG9F is a partially enlarged schematic view of region A of FIG9D, FIG9G is a partially enlarged schematic view of region B of FIG9C, FIG9H is a structural schematic view of an L-shaped inlet air duct of the powder inhaler provided in FIG1, FIG10A is a structural schematic view of the drive cam of the powder inhaler provided in FIG1 at one angle, FIG10B is a structural schematic view of the drive cam provided in FIG10A at another angle, FIG10C is a structural schematic view of the drive cam provided in FIG10A at yet another angle, and FIG11 is a structural schematic view of the air bag pressing piece of the powder inhaler provided in FIG1.

[0202] Referring to Figures 1 to 4, the present application provides a powder inhaler, which includes a shell assembly (not marked in the figures), a functional mechanism (not shown in Figures 1 to 4) and an outer cover 4; wherein, the functional mechanism is arranged in the shell assembly, the outer cover 4 is connected to the shell 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, and when the outer cover 4 is in the second position, the outer cover 4 is in an open state. wherein, the outer cover 4 cooperates with the functional mechanism, and the interlocking action of each functional mechanism is realized by the back and forth rotation of the outer cover 4 between the first position and the second position, so that the powder inhaler realizes the powder dispensing function of medicinal powder or the like. The back and forth rotation of the present application refers to a back and forth rotation 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.

[0203] Specifically, the housing assembly includes a front housing 1, a rear housing 2, and an upper housing 3. The front housing 1, rear housing 2, and upper housing 3 are interconnected and cooperate to form a storage space, within which a functional mechanism is disposed. The outer cover 4 is rotatably connected to the bottom end of the housing assembly, thereby being able to rotate back and forth between a first position and a second position to achieve the opening and closing process. The outer cover 4 can be rotationally connected to the bottom end of the housing assembly by a rotating shaft or by an arc-shaped slide rail. The shape and structure of the front housing 1, rear housing 2, upper housing 3, and outer cover 4 are not limited, and the materials can be metal, plastic, or the like.

[0204] Referring to Figures 1 and 5A to 9B, outer cover 4 includes two connecting portions 406 disposed opposite each other along a first direction. These two connecting portions 406 are 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 outer cover 4 are assembled and connected to the housing assembly by means of a rotating shaft that cooperates with a hole. 5A , 5B , 6A , 8A , 8B , 9A , and 9B , the powder inhaler further comprises a driving gear 5 , which is disposed in the housing assembly. A driving shaft 501 is provided on one end face of the driving gear 5 , a first axial hole 401 and a driving hole 402 are provided on one connecting portion 406 of the outer cover 4 , a second axial hole 404 is provided on the other connecting portion 406 of the outer cover 4 , and a cylinder 105 is provided on the front housing 1 corresponding to the first axial hole 401 and the second axial hole 404 , respectively. The cylinder 105 is defined as a first cylinder. The first axial hole 401 and the second axial hole 404 of the outer cover 4 cooperate with the corresponding cylinder 105 of the front housing 1 , and the driving hole 402 of the outer cover 4 cooperates 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.

[0205] As shown in FIG6B , the powder inhaler further includes a sealing ring 6 , which is disposed between the connecting portion 406 of the outer cover 4 and the drive gear 5 for sealing, thereby ensuring consistency of the airway and the inhalation resistance of the powder inhaler and preventing gas from entering the housing assembly from between the connecting portion 406 of the drive gear 5 and the outer cover 4 .

[0206] Referring to Figures 5A, 6A, 7A, and 7B, an arcuate rib 405 is further provided on one of the connecting portions 406 of the outer cover 4, and an acoustic spring arm 108 is provided on the front housing 1. The arcuate rib 405 on the outer cover 4 is used to cooperate with the acoustic spring arm 108 on the front housing 1 to provide an audible prompt indicating that the cover is fully opened when the outer cover 4 rotates from the first position to the second position. Specifically, during the opening process of the outer cover 4, that is, during the process of the outer cover 4 rotating from the first position to the second position, the acoustic spring arm 108 is located outside the arcuate rib 405, and the acoustic spring arm 108 moves along the periphery of the arcuate rib 405. After the outer cover 4 is fully opened, that is, when it rotates to the second position, the acoustic spring arm 108 cooperates with the arcuate rib 405 to provide an audible prompt indicating that the cover is fully opened. During the closing process of the outer cover 4, i.e., during the rotation process of the outer cover 4 from the second position to the first position, the outer cover 4 is located inside the arcuate rib 405 and moves along the inner circumference of the arcuate rib 405. After the outer cover 4 is fully closed, i.e., when it rotates to the first position, the acoustic spring arm 108 cooperates with the arcuate rib 405 to produce an audible prompt indicating that the cover is fully closed. 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 second position relative to the first position is 150 degrees. During the opening process, when the outer cover 4 rotates from 0 degrees to 150 degrees, i.e., when the outer cover 4 rotates to 150 degrees, the arcuate rib 405 of the outer cover 4 contacts the acoustic spring arm 108 of the front housing 1, producing an audible prompt indicating that the cover is fully opened. 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, to be greater than or equal to 120 degrees and less than or equal to 180 degrees, as long as the outer cover 4 can expose the suction nozzle 101 in the second position.

[0207] 6A and 12A to 13B , the powder inhaler includes an inhalation channel 706 and a mouthpiece 101. The mouthpiece 101 communicates with the inhalation channel 706, allowing the user to inhale powdered medicine from an outlet 102 of the mouthpiece 101. Specifically, the housing assembly includes the mouthpiece 101, which is disposed on the front housing 1 and sleeved over the inhalation channel 706. When the outer cover 4 is in the first position, the outer cover 4 obscures the outlet 102 of the mouthpiece 101. When the outer cover 4 is in the second position, the outlet 102 of the mouthpiece 101 is exposed.

[0208] Specifically, as shown in FIG5A , the connection portion 406 of the outer cover 4 is provided with two drive holes 402 , which are respectively provided on either side of the first shaft hole 401 . Two drive shafts 501 are provided on one end surface of the drive gear 5 , which are respectively provided on either side of the cylinder 105 of the front housing 1 . The two drive holes 402 are connected to the two drive shafts 501 in a one-to-one correspondence. In other embodiments, the drive holes 402 and the drive shafts 501 may be provided in one, three, or other corresponding numbers. It is understood that the connection between the outer cover 4 and the drive gear 5 is not limited to the above-described method and may also be integrally formed, glued, or welded, as long as the rotation of the outer cover 4 can drive the rotation of the drive gear 5 .

[0209] As shown in FIG9A , the powder inhaler further includes an intermediate gear 13 disposed within the housing assembly and meshing with the drive gear 5. The outer cover 4, through its mating connection with the drive gear 5, enables the outer cover 4 to drive the drive gear 5 and the functional mechanisms in a coordinated manner. Specifically, the outer cover 4 rotates about the cylinder 105 of the front housing 1, and the drive hole 402 in the outer cover 4 drives the drive gear 5 to rotate synchronously, thereby achieving the coordinated operation of the various functional mechanisms through the intermediate gear 13.

[0210] The functional mechanisms include an air compression mechanism, a powder delivery mechanism, an inhalation trigger mechanism, and a counting mechanism. Rotation during the opening process of the outer cover 4 activates the air compression mechanism to perform the air compression function. After the air compression is completed, the powder delivery mechanism is activated to perform the powder delivery function, thereby delivering powder such as medicinal powder to the inhalation channel 706 of the powder inhaler. The inhalation trigger mechanism then activates the inhalation trigger function to facilitate the user's inhalation of the medicinal powder. Furthermore, closing the outer cover 4 resets the air compression mechanism, powder delivery mechanism, and inhalation trigger mechanism, and activates the counting mechanism to count.

[0211] The various functional units are introduced below.

[0212] (1) Air compression mechanism

[0213] Referring to Figures 12A to 14B, Figure 12A is a structural schematic diagram of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided in Figure 1 when it is in the third position in the powder container, Figure 12B is a structural schematic diagram of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided in Figure 1 when it is in the fourth position in the powder container, Figure 13A is a structural schematic diagram of the powder container of the powder inhaler provided in Figure 1 at one angle, Figure 13B is a structural schematic diagram of the powder container provided in Figure 13A at another angle, Figure 14A is a structural schematic diagram of the powder metering wheel of the powder inhaler provided in Figure 1 at one angle, and Figure 14B is a structural schematic diagram of the powder metering wheel provided in 14A at another angle.

[0214] 5A to 14B , specifically, the air compression mechanism includes an airbag pressing member 17, an air-compressing 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 described below. The powder delivery mechanism includes a powder container 7 and a powder metering wheel 9. The powder metering wheel 9 has a dosage cup 902. The powder container 7 has a storage chamber 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-compressing airbag 18 under the drive of the elastic member 19, so that the air-compressing 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-compressing airbag 18 to expand.

[0215] 12A to 13B , specifically, the first end of the storage chamber 715 has a powder outlet 713, and the second end has a compressed air port 714. The compressed air bag 18 is disposed at the second end of the storage chamber 715 and communicates with the compressed air port 714. Specifically, the outer side surface of the second end of the storage chamber 715 has an annular rib 701. The end of the compressed air bag 18 proximal to the powder container 7 engages with the annular rib 701 of the powder container 7, thereby connecting the compressed air bag 18 to the powder container 7. The air bag pressing member 17 is movably mounted on the outside of the compressed air bag 18 and the storage chamber 715. The elastic member 19 may be an elastic structural member such as a spring. The air bag pressing member 17 is used to compress the compressed air bag 18 under the drive of the elastic member 19. Among them, the airbag pressure piece 17 can move back and forth between the fifth position and the sixth position, so that the compressed airbag 18 pressurizes air into the storage chamber 715 to realize the air compression function, thereby facilitating the extrusion of the powder in the storage chamber 715 from the powder outlet 713 into the dosage cup 902 of the powder metering wheel 9.

[0216] As shown in Figures 9A, 9B, 11, 13A and 13B, the top wall of the airbag pressing piece 17 has a fixing hole 1701, which is used to connect the top of the compressed airbag 18. For example, the top of the compressed airbag 18 can pass through the fixing hole 1701, and the compressed airbag 18 is partially restricted outside the top wall of the airbag pressing piece 17, and the other part is restricted to the side of the top wall of the airbag pressing piece 17 near the compressed air port 714, so that the compressed airbag 18 can be driven to expand and contract through the movement of the airbag pressing piece 17 and the cooperation of the elastic member 19. By driving the compressed airbag 18 to expand and contract through the airbag pressing piece 17, the compression efficiency of the compressed airbag 18 can be improved, and it can be avoided that the compressed airbag 18 cannot be reset due to gas, resulting in abnormal operation of the compressed airbag 18.

[0217] Powder inhaler also comprises driving cam 12, and driving cam 12 is arranged in the housing assembly, concrete, participate in Fig. 9 A, powder inhaler also comprises gear bracket 14, gear bracket 14 is arranged in the housing assembly, driving cam 12 is assembled on the gear bracket 14, one end of gear bracket 14 is assembled and connected with powder metering wheel 9, and the other end is assembled and connected with driving cam 12. Outer cover 4 drives driving gear 5 linkage, and driving gear 5 is meshed with intermediate gear 13, and intermediate gear 13 is meshed with driving cam 12, realizes that driving cam 12 and driving gear 5 rotate in the same direction.Be appreciated that the application also can save driving gear 5 and / or intermediate gear 13, as long as can drive cam 12 to rotate by outer cover 4 rotations.Driving cam 12 and elastic member 19 are used to drive air bag pressing piece 17 to move back and forth between the 5th position and the 6th position, thereby drive compressed air bag 18 to expand and contract, to realize compressed air and reset function. Specifically, the elastic member 19 is arranged on one side of the top wall of the airbag pressure member 17, one end of the elastic member 19 abuts against the top wall of the airbag pressure member 17, and the other end abuts against the top wall of the upper shell 3 to drive the airbag pressure member 17 to move; the driving cam 12 rotates to make way for the airbag pressure member 17, and the elastic member 19 drives the airbag pressure member 17 to move from the fifth position to the sixth position; the driving cam 12 squeezes the airbag pressure member 17, and the airbag pressure member 17 resets and moves from the sixth position to the fifth position and squeezes the elastic member 19.

[0218] 10A to 11 , the side wall of the airbag pressure member 17 has a protruding rod 1704 at one end away from the top wall. The protruding rod 1704 has a curved surface 1703 at one end away from the top wall of the airbag pressure member 17. The driving cam 12 has a cam curved surface 1202. The curved surface 1703 cooperates with the cam curved surface 1202 of the driving cam 12 to enable the airbag pressure member 17 to move back and forth between the fifth position and the sixth position. Specifically, when the airbag pressure member 17 is in the fifth position, the curved surface 1703 of the protruding rod 1704 of the airbag pressure member 17 abuts the side surface of the driving cam 12, and the curved surface 1703 of the airbag pressure member 17 is confined within the arc-shaped groove 1201 of the driving cam 12. At this time, the top wall of the airbag pressure member 17 compresses the elastic member 19, causing it to be compressed, while the top wall of the airbag pressure member 17 stretches the compressed airbag 18, causing it to be extended. 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.

[0219] In one embodiment, the ratio of the number of teeth between the drive gear 5 and the drive cam 12 is 18:15. That is, when the outer cover 4 is opened 150°, the drive gear 5 rotates synchronously 150°. At this point, the rotation angle of the drive cam 12 is 180°. It will be appreciated that setting the ratio of the number of teeth between the drive gear 5 and the drive cam 12 to 18:15 can reduce the size of the drive gear 5 and save space. In other embodiments, the powder inhaler can also be provided without the drive gear 5 and the intermediate gear 13. The outer cover 4 and the drive cam 12 can be directly linked to achieve the linkage. The rotation of the outer cover 4 drives the rotation of the drive cam 12, thereby achieving the linkage of the functional mechanism.

[0220] Specifically, as shown in Figures 9A to 11, the driving cam 12 includes a main body 1200 and a gear 1203. The gear 1203 is coaxially connected to the main body 1200 and is used to drive the main body 1200 in rotation. The gear 1203 meshes with the intermediate gear 13. A guide groove 1209 is formed on one surface of the main body 1200. The side of the guide groove 1209 is a cam curved surface 1202. The cam curved surface 1202 cooperates with the arcuate surface 1703 of the airbag pressure member 17 to enable the airbag pressure member 17 to move back and forth between the fifth and sixth positions. Specifically, the driving cam 12 has a center hole 1204, which is defined as a first center hole. The gear 1203 is disposed on a surface of the main body 1200 and surrounds the center hole 1204. The center hole 1204 extends through the main body 1200 and the gear 1203. The center hole 1204 of the driving cam 12 is mounted on the gear bracket 14 of the powder inhaler. The guide groove 1209 is located on the surface of the main body 1200 facing the gear 1203, and the guide groove 1209 is spaced apart from the gear 1203. The airbag pressure piece 17 moves up and down along the longitudinal direction between the fifth position and the sixth position. The present application simplifies the structure of the air compression mechanism and improves the stability of the air compression mechanism by directly abutting the cam surface 1202 of the driving cam 12 against the protruding rod 1704 of the airbag pressure piece 17. In one embodiment, the air compression mechanism includes only four independent components: the airbag pressure piece 17, the compressed airbag 18, the elastic member 19, and the driving cam 12, making the air compression mechanism structure simple.

[0221] In some embodiments, the protruding rod 1704 of the airbag pressure piece 17 has a pointed end away from the top wall, and the end face of the pointed end is an arc surface 1703. The outer peripheral side surface of the main body 1200 of the driving cam 12 has an arc-shaped groove 1201. When the airbag pressure piece 17 is configured to the fifth position, the pointed end of the protruding rod 1704 is embedded in the arc-shaped groove 1201 of the main body 1200 to achieve initial positioning and preliminary limiting of the airbag pressure piece 17.

[0222] In one specific embodiment, the arc-shaped groove 1201 is a circular arc-shaped groove, the bottom surface of the arc-shaped groove 1201 is a circular arc, and the arc surface 1703 of the protruding 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 protruding rod 1704 is embedded in the arc-shaped groove 1201 to initially position and initially limit the airbag pressing member 17. Therefore, 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 from the arc-shaped groove 1201, which can effectively prevent the air compression mechanism from being triggered accidentally.

[0223] In one embodiment, the bottom surface of the arc groove 1201 is arc-shaped, and the arc surface 1703 of the protruding rod 1704 is also an arc surface. During the process of the arc surface 1703 of the protruding rod 1704 moving from one side of the bottom surface of the arc groove 1201 to the other side, the protruding rod 1704 does not move, and the outer cover 4 rotates in an idle stroke.

[0224] 9A to 13B , the side wall of the storage cavity 715 of the powder container 7 has a vent hole 709, and the side wall of the airbag press 17 has a pressure relief hole 1702. As shown in FIG9C and FIG9E , when the airbag press 17 is configured to the fifth position, the side wall of the airbag press 17 blocks the vent hole 709, and the vent hole 709 is not connected to the pressure relief hole 1702; as shown in FIG9D and FIG9F , when the airbag press 17 is configured to the sixth position, the pressure relief hole 1702 is connected to the vent hole 709. During the movement of the airbag press 17 from the fifth position to the sixth position, air is first compressed into the storage cavity 715 through the air bag 18, so that the powder in the storage cavity 715 is filled and compacted into the dosage cup 902 of the powder metering wheel 9 through the powder outlet 713, so as to improve the consistency of the powder filling. After the pressure relief hole 1702 is connected to the vent hole 709, the pressure in the storage chamber 715 is relieved to release the pressure in the storage chamber 715 of the powder container 7 to normal pressure. This prevents excessive pressure in the storage chamber 715 due to the lack of pressure relief during the subsequent powder delivery process, which in turn causes powder to leak from the gap when the powder metering wheel 9 of the powder delivery mechanism rotates, thereby reducing powder waste. That is, when the airbag pressure piece 17 moves from the fifth position to the sixth position, it first performs a compression process and then a pressure relief process. The pressure relief process is performed at the later stage of the downward stroke of the airbag pressure piece 17. Since the pressure relief process of the storage chamber 715 in this application is completed before the powder metering wheel 9 rotates from the third position to the fourth position, less powder will leak from the powder outlet 713 under air pressure after the powder metering wheel 9 starts to rotate from the third position to the fourth position.

[0225] Specifically, referring to Figures 9C and 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 and spaced from the port of the compressed air port 714, isolating the space of the compressed air bag 18 from the interior space of the storage chamber 715. The filter membrane 25 may be a waterproof and breathable membrane that can filter impurities from powders such as medicinal powders, as well as water vapor, to prevent the powder in the storage chamber 715 from becoming damp. A vent 709 is provided in the sidewall of the storage chamber 715. One end of the vent 709 communicates with the space between the filter membrane 25 and the compressed air bag 18. In other words, the vent 709 is not directly connected to the interior of the storage chamber 715 but is relatively independent of the interior of the storage chamber 715. After the vent hole 709 is connected to the pressure relief hole 1702, the gas in the space between the filter membrane 25 and the compressed air bag 18 can be discharged through the vent hole 709 and the pressure relief hole 1702 in sequence, thereby relieving the pressure in the space between the filter membrane 25 and the compressed air bag 18. At the same time, because the filter membrane 25 is a breathable membrane, the gas in the storage chamber 715 can also pass through the filter membrane 25 and enter the space between the filter membrane 25 and the compressed air bag 18, and then be discharged through the vent hole 709 to relieve the pressure in the storage chamber 715. This prevents the vent hole 709 from being directly connected to the interior of the storage chamber 715. During the pressure relief process, the gas in the storage chamber 715 can directly leak out of the vent hole 709, causing the powder in the storage chamber 715 to fly or leak. During the expansion of the compressed airbag 18, i.e., during the inhalation process of the compressed airbag 18, external air enters the space between the filter membrane 25 and the compressed airbag 18 through the vent 709, and then enters the storage chamber 715 through the filter membrane 25. This prevents the vent 709 from directly communicating with the interior of the storage chamber 715. During the inhalation process of the compressed airbag 18, external air directly enters the storage chamber 715 through the vent 709, bringing external water molecules into the storage chamber 715, causing the powder in the storage chamber 715 to fly or become wet, resulting in waste. Furthermore, the filter membrane 25 also prevents powder from entering the storage chamber 715 into the compressed airbag 18, thereby causing powder waste.

[0226] Referring to Figure 13A, the side wall of the storage cavity 715 of the powder container 7 is further provided with a receiving cavity 702, which is used to store a desiccant. The storage cavity 715 and the receiving cavity 702 have a common side wall, and the common side wall can be made of a permeable material so that the desiccant in the receiving cavity 702 can absorb the water vapor in the storage cavity 715 to prevent the powder in the storage cavity 715 from getting damp.

[0227] In a preferred embodiment, the downward stroke of the airbag pressure piece 17 during its movement from the fifth position to the sixth position is within a range of 2 mm to 6 mm. For example, in one specific embodiment, the downward stroke of the airbag pressure piece 17 is 3.5 mm, wherein the first 3 mm of the downward stroke is the compression stroke, and the last 0.5 mm of the downward stroke is the pressure relief stroke. When the downward stroke of the airbag pressure piece 17 reaches 3 mm, the pressure relief hole 1702 and the vent hole 709 are at a critical point of communication. When the downward stroke of the airbag pressure piece 17 is between 3 mm and 3.5 mm, the pressure relief hole 1702 and the vent hole 709 are connected to achieve pressure relief. 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 150 degrees. When the downward pressure stroke of the airbag pressure piece 17 of the air compression mechanism is 3.5 mm, that is, when the airbag pressure piece 17 is in the sixth position, the angle of the outer cover 4 is 62.5 degrees, which drives the rotation angle of the drive gear 5 to be 62.5 degrees, and the corresponding rotation angle of the drive cam 12 is 75 degrees.

[0228] More preferably, during the opening process, when the outer cover 4 is rotated at an angle of 55 degrees, the downward 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, i.e., the air compression process. When the outer cover 4 is rotated at an angle of 62.5 degrees, the pressure relief process is completed, releasing the compressed gas in the powder container 7 to normal pressure, thereby preventing powder leakage when the powder metering wheel 9 rotates. It will be understood that the above angle selection is only an example, and other angle ranges may also be selected.

[0229] 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, with the second curved surface segment 1212 located at an end of the first curved surface segment 1211 away from the arc-shaped groove 1201. The first curved surface segment 1211 is a non-circular surface, while the second curved surface segment 1212 is a circular surface. The second curved surface segment 1212 is concentrically disposed with the outer peripheral side surface of the body portion 1200.

[0230] It can be understood that the first curved surface segment 1211 is set as a non-circular surface. During the closing process of the outer cover 4 of the powder inhaler, the driving cam 12 rotates in the opposite direction, and the rotation of the first curved surface segment 1211 drives the airbag pressure piece 17 to reset from the sixth position to the fifth position. Specifically, during the process of resetting the airbag pressure piece 17 from the sixth position to the fifth position, the curved surface 1703 of the protruding rod 1704 of the airbag pressure piece 17 abuts against the first curved surface segment 1211. The first curved surface segment 1211 is a non-circular surface. The reverse rotation of the first curved surface segment 1211 pushes the protruding rod 1704 of the airbag pressure piece 17 to continuously move upward, thereby realizing the resetting of the airbag pressure piece 17.

[0231] Preferably, the first curved surface segment 1211 includes a first curved surface segment 1214, a flat surface segment 1215, and a second curved surface segment 1216 that are interconnected. The flat surface segment 1215 is located between the first curved surface segment 1214 and the second curved surface segment 1216, and the flat surface segment 1215 is located at the end of the first curved surface segment 1214 that is away from the arc-shaped groove 1201. During the opening process of the outer cover 4, when the airbag pressing member 17 moves from the fifth position to the sixth position, it must first overcome the resistance of the side wall of the arc-shaped groove 1201 near the first curved surface segment 1214 to the curved surface 1703 of the protruding rod 1704, so that the tip of the protruding rod 1704 is disengaged from the arc-shaped groove 1201. This process is the idle stroke of the opening process and requires a large torque to prevent accidental opening of the cover.

[0232] In one 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 is defined as 150 degrees. The process of the outer cover 4 rotating from 0 degrees to 12 degrees is the lid opening idle stroke, wherein the process of the outer cover 4 rotating from 0 degrees to 8 degrees is the first lid opening idle stroke, and the process of the outer cover 4 rotating from 8 degrees to 12 degrees is the second lid opening idle stroke. During the first lid opening idle stroke, the outer cover 4 rotates so that the curved surface 1703 of the tip of the protruding rod 1704 abuts from the end of the arcuate groove 1201 away from the first curved surface segment 1214 to the end of the arcuate groove 1201 closer to the first curved surface segment 1214, that is, the curved surface 1703 of the tip of the protruding rod 1704 slides across the bottom surface of the arcuate groove 1201. Preferably, the torque during this process is 0.05 N·m, which can effectively prevent accidental lid opening due to non-human factors. In the second lid opening idle stroke, the outer cover 4 rotates so that the arc surface 1703 of the tip of the protruding rod 1704 abuts against the first arc surface segment 1214 at one end of the arc groove 1201 close to the first arc surface segment 1214, that is, the arc surface 1703 of the tip of the protruding rod 1704 needs to be disengaged from the arc groove 1201, which requires a greater torque than the first lid opening idle stroke. Preferably, the torque in the second lid opening idle stroke is 0.15 N·m. Setting a greater lid opening resistance can more effectively prevent accidental lid opening.

[0233] During the opening process of the outer cover 4, when the outer cover 4 rotates to 12 degrees, the arc surface 1703 at the tip of the protruding rod 1704 of the airbag pressing piece 17 disengages from the arc groove 1201 and abuts against the first arc surface segment 1214, and the opening idle stroke of the outer cover 4 is completed. Thereafter, during the process of the outer cover 4 rotating from 12 degrees to 62.5 degrees, the air compression mechanism performs the air compression process and the pressure relief process. At this time, the outer cover 4 performs the first opening load stroke.

[0234] Since the arc surface 1703 at the tip of the protruding rod 1704 has disengaged from the arc groove 1201 when the outer cover 4 rotates to 12 degrees, the outer cover 4 will open instantly and rotate instantly from 12 degrees to 55 degrees, driving the driving cam 12 to rotate instantaneously to 66 degrees. At this time, the protruding rod 1704 of the airbag pressing piece 17 will also move downward instantaneously, and the arc surface 1703 at the tip of the protruding rod 1704 will move instantaneously to abut against the end of the plane segment 1215 close to the second arc surface segment 1216. The downward pressure stroke of the protruding rod 1704 of the airbag pressing piece 17 reaches 3mm, 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 vent hole 709 are at the critical point of connection. During the process of outer cover 4 rotating from 55 degrees to 62.5 degrees, driving cam 12 rotates from 66 degrees to 75 degrees, and the tip of protruding rod 1704 of airbag pressing member 17 abuts from the end of second arc segment 1216 close to plane segment 1215 to the end of second arc segment 1216 away from plane segment 1215, that is, the tip of protruding rod 1704 slides over second arc segment 1216. During this process, the downward stroke of protruding rod 1704 of airbag pressing member 17 is between 3mm and 3.5mm, and pressure relief hole 1702 and vent hole 709 are connected to achieve pressure relief. The torque of outer cover 4 in the first load stroke of opening the lid is constant. Preferably, the torque of outer cover 4 in the first load stroke of opening the lid is 0N·m, that is, the torque of outer cover 4 in the process of rotating from 12 degrees to 62.5 degrees is 0N·m, which is conducive to the instantaneous opening of outer cover 4, so that the air compression mechanism can quickly and instantaneously compress air, thereby improving the air compression effect.

[0235] When the outer cover 4 rotates to 62.5 degrees, the arc surface 1703 of the tip of the protruding rod 1704 of the airbag pressure piece 17 is at the critical point between the first curved segment 1211 and the second curved segment 1212. When the outer cover 4 continues to rotate from 62.5 degrees to 150 degrees, the driving cam 12 rotates from 75 degrees to 180 degrees, and the arc surface 1703 of the protruding rod 1704 of the airbag pressure piece 17 abuts from the end of the second curved segment 1212 close to the first curved segment 1211 to the end of the second curved segment 1212 away from the first curved segment 1211. Since the second curved surface segment 1212 is an arc surface, and the second curved surface segment 1212 is concentrically arranged with the outer peripheral side surface of the main body 1200 and the pitch circle of the gear 1203, when the outer cover 4 rotates from 62.5 degrees to 150 degrees, the protruding rod 1704 of the airbag pressure piece 17 is still in the sixth position, that is, at 3.5 mm, and the protruding rod 1704 of the airbag pressure piece 17 will not move.

[0236] Referring to Figures 1 to 11, a stop groove 1213 is provided at one end of the second curved surface segment 1212 of the driving cam 12 away from the first curved surface segment 1211. After the outer cover 4 is fully opened, the tip of the protruding rod 1704 of the airbag pressure piece 17 is located in the stop groove 1213. The gravity of the airbag pressure piece 17 acts on the driving cam 12, so that the tip of the protruding rod 1704 of the airbag pressure piece 17 limits the driving cam 12. This prevents the driving cam 12 from rotating in the opposite direction under the action of the return torsion spring 15 (as shown in Figure 17A) after the user releases the lid after the lid is fully opened, causing the outer cover to automatically close after the lid is fully opened. In one specific embodiment, the stop groove 1213 is a circular arc groove, and the bottom surface of the stop groove 1213 is circular arc-shaped to facilitate better fit between the tip of the protruding rod 1704 and the stop groove 1213.

[0237] (2) Powder delivery mechanism

[0238] 12A to 14B , the powder delivery mechanism includes a powder container 7 and a powder metering wheel 9, which is rotatably connected to the powder container 7. Specifically, the powder container 7 has a storage chamber 715, an inhalation channel 706, and a first cylindrical groove 716. The powder metering wheel 9 is mounted within the first cylindrical groove 716 and is capable of reciprocating between a third position and a fourth position. In the third position, the dosage cup 902 of the powder metering wheel 9 is in a powder filling position, and in the fourth position, the dosage cup 902 of the powder metering wheel 9 is in a powder inhalation position, corresponding to the inhalation channel 706. It should be noted that the reciprocating rotation of the powder metering wheel 9 between the third and fourth positions of the present application is along a minor arc. That is, the direction of rotation of the powder metering wheel 9 from the third position to the fourth position is opposite to the direction of rotation from the fourth position to the third position. The reciprocating rotation between the third and fourth positions is not achieved by rotating the powder metering wheel 9 along the inner circumference of the first cylindrical groove 716 for a full rotation. 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 shortened and the powder metering wheel 9 can move along the optimal path, thereby more effectively avoiding the waste and loss of the powder in the dosage cup 902 during the movement of the powder metering wheel 9.

[0239] The powder metering wheel 9 includes a dosage cup 902. When the powder metering wheel 9 is in the third position, the dosage cup 902 corresponds to the powder outlet 713 of the storage chamber 715 and is configured to receive powder from the powder container 7. When the powder metering wheel 9 is in the fourth position, the dosage cup 902 corresponds to the inlet 704 of the inhalation channel 706. Specifically, when the airbag pressing member 17 moves from the fifth position to the sixth position, the powder metering wheel 9 is in the third position. Driven by the elastic member 19, the airbag pressing member 17 acts on the compressed airbag 18, filling and compacting the powder in the storage chamber 715 into the dosage cup 902 of the powder metering wheel 9.

[0240] 13A , 14A , and 14B , specifically, the powder metering wheel 9 is installed in the first cylindrical groove 716 and has an outer arc surface 901. The outer arc surface 901 of the powder metering wheel 9 is aligned with the inner arc surface 705 of the first cylindrical groove 716 of the powder container 7. The outer arc surface 901 of the powder metering wheel 9 is an arc annular surface that covers the reciprocating stroke. The arc angle of the outer arc surface 901 is greater than or equal to 140 degrees and less than or equal to 170 degrees. Preferably, the arc angle of the outer arc surface 901 is approximately 150 degrees.

[0241] 13A and 14B , the first cylindrical groove 716 of the powder container 7 includes a cylinder 703 , which is defined as a second cylinder. The powder metering wheel 9 includes a center hole 906 , which is defined as a second center hole. The first end of the powder metering wheel 9 includes a tightening spring arm 909 , which is defined as a first tightening spring arm. The tightening spring arm 909 is disposed outside the center hole 906 . The pressing spring arm 909 of the powder metering wheel 9 is cooperated 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 center hole 906, and the pressing spring arm 909 abuts against the cylinder 703 in the first cylindrical groove 716. The inner diameter formed by the pressing spring arm 909 is smaller than the outer diameter of the cylinder 703. Therefore, during assembly, the pressing spring arm 909 is elastically deformed. The elastic deformation of the pressing spring arm 909 of the powder metering wheel 9 provides a pressing force for the inner arc surface 705 of the first cylindrical groove 716 to fit with the outer arc surface 901 of the powder metering wheel 9, thereby improving the sealing reliability and making the powder metering wheel 9 more tightly assembled in the first cylindrical groove 716 of the powder container 7, so as to facilitate a good assembly connection between the powder metering wheel 9 and the powder container 7.

[0242] A dosage cup 902 is provided on the outer side of the powder metering wheel 9. Specifically, the dosage cup 902 is disposed on the outer curved surface 901 of the powder metering wheel 9 and is used to hold powder. In a preferred embodiment, only one dosage cup 902 is disposed on the outer curved surface 901 of the powder metering wheel 9. The powder metering wheel 9 rotates back and forth between the inlet 704 and the powder outlet 713 of the inhalation channel 706 solely through the reciprocating rotation of the powder metering wheel 9 between the third and fourth positions, thereby enabling powder filling and delivery, thereby facilitating inhalation by the user.

[0243] As can be understood, the amount of powder contained in a single dose cup 902 is fixed, and the amount of powder entering the inhalation passage 706 during a user's inhalation is fixed. This avoids the possibility of excessive amounts of powder, such as medicine powder, being dispensed by disposing multiple dose cups 902 spaced circumferentially on the outer surface of a cylindrical metering member, which would allow multiple doses to be continuously dispensed into the inhalation passage 706 as the metering member rotates. Alternatively, when a flat metering member is provided with a series of dose slots or a single dose slot, the position for inhalation and the open position of the outer cover 4 may be inconsistent during translation, resulting in the user inhaling multiple doses of powder in a single inhalation, which in turn may lead to excessive amounts of powder. Specifically, by providing only one dose cup 902 on the outer arcuate surface 901 of the powder metering wheel 9, the amount of powder inhaled by the user at the outlet 102 of the mouthpiece 101 is fixed, eliminating the possibility of inhaling multiple doses of powder. This allows for precise control of the amount of powder inhaled, while simplifying the structure.

[0244] In other embodiments, a dosage cup 902 provided on the outer arc surface 901 of the powder metering wheel 9 may also include multiple sub-dose cups, that is, at one position, a dosage cup 902 may be divided into multiple mutually spaced sub-dose cups. For example, one or more partitions may be provided in the dosage cup 902 to separate the dosage cup 902 into multiple sub-dose cups. Alternatively, in other embodiments, multiple dosage cups 902 may be spaced apart on the outer arc surface 901 of the powder metering wheel 9. As long as the powder holding amount in the dosage cup 902 is fixed at a fixed position, the amount of powder inhaled by the user can be accurately controlled.

[0245] Referring to FIG. 14A , in one embodiment, the outer curved surface 901 of the powder metering wheel 9 is further provided with a first powder scraping groove 903 . The first powder scraping groove 903 is a notch provided on the outer curved surface 901 . Specifically, the first powder scraping groove 903 is arranged obliquely with respect to the circumference of the powder metering wheel 9 . The first powder scraping groove 903 is used to scrape and discharge fine powder adhering to the inner curved surface 705 of the powder container 7 , thereby preventing the fine powder on the inner curved surface 705 of the powder container 7 from blocking the movement of the powder metering wheel 9 and improving the smoothness of the movement of the powder metering wheel 9 within the first cylindrical groove 716 of the powder container 7 . Preferably, the depth of the first powder scraping groove 903 is 0.2 mm to 0.4 mm.

[0246] In one embodiment, a second powder scraping groove 904 is further provided on the outer curved 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 to 0.9 mm. The second powder scraping groove 904 is used to scrape and discharge large particles of powder adhering to the inner curved surface 705 of the powder container 7, thereby further improving the smoothness of the movement of the powder metering wheel 9 within the first cylindrical groove 716 of the powder container 7. In some embodiments, the width of the second powder scraping groove 904 can also be greater than that of the first powder scraping groove 903. Among them, along the direction of the powder metering wheel 9 turning from the third position to the fourth position, the second powder scraping groove 904 is arranged on the side of the first powder scraping groove 903 away from the dosage cup 902. This is convenient for the second powder scraping groove 904 to scrape off and discharge the large particles of powder attached to the inner arc surface 705 of the powder container 7 during the process of the powder metering wheel 9 turning from the third position to the fourth position, that is, during the dosing stroke of the powder metering wheel 9, thereby reducing the movement resistance of the large particles of powder to the powder metering wheel 9. Then, the first powder scraping groove 903 scrapes off and discharges the remaining fine powder attached to the inner arc surface 705 of the powder container 7, thereby better ensuring the smooth movement of the powder metering wheel 9 in the first cylindrical groove 716 of the powder container 7. The first powder scraping groove 903 and the second powder scraping groove 904 have different sizes. During the dosing stroke and the reset stroke of the powder metering wheel 9, that is, when the powder metering wheel 9 rotates from the fourth position to the third position, the first powder scraping groove 903 and the second powder scraping groove 904 can clean the powder on the inner arc surface 705 of the powder container 7 multiple times and in multiple gradients, thereby further improving the accuracy of the powder dosage.

[0247] In one embodiment, the end surface of the first end of the powder metering wheel 9 has a first rib 908 , which prevents friction between the plane and adjacent parts, and improves the smoothness of the reciprocating motion of the powder metering wheel 9 through contact friction of the rib.

[0248] In one embodiment, the end surface of the second end of the powder metering wheel 9 has a second rib 907 , which prevents friction between the plane and adjacent parts, and improves the smoothness of the reciprocating motion of the powder metering wheel 9 through contact friction of the rib.

[0249] In one embodiment, the end surface of the first end of the powder metering wheel 9 has a first rib 908 , and the second end has a second rib 907 .

[0250] In one embodiment, referring to FIG14B , the first end of the powder metering wheel 9 further comprises a groove 911 and a driving elastic arm 910 . The groove 911 is disposed on the periphery of the central hole 906 . One end of the driving elastic arm 910 is connected to the side wall of the groove 911 , while the other end is a free end. The driving elastic arm 910 is spaced apart from the pressing elastic arm 909 . One end of the wedge-shaped column 1005 of the dose protection plate 10 extends into the groove 911 . The driving elastic 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. The provision of 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 by which the driving elastic arm 910 drives the dose protection plate 10 to rotate and reset will be described in detail in the subsequent process of resetting the triggering function mechanism when the outer cover 4 is closed, and will not be described in detail here.

[0251] 10B and 14A , the surface of the main body 1200 of the driving cam 12, facing away from the gear 1203, further includes an annular boss 1207. This boss 1207 is coaxially disposed with the gear 1203 and is used to drive the powder metering wheel 9 in rotation. Specifically, the second end of the powder metering wheel 9 includes a boss 905, which is defined as a first boss. This boss 905 of the powder metering wheel 9 is configured to cooperate with the annular boss 1207 of the driving cam 12 to achieve rotational drive. Specifically, the two annular bosses 1207 are centrally symmetrically disposed about the center of the central hole 1204, while the two bosses 905 are centrally symmetrically disposed about the center of the central hole 906.

[0252] In a preferred embodiment, during the opening process, the angle of the outer cover 4 in the second position is 150 degrees. During the process of the outer cover 4 rotating from the first position (i.e., 0 degrees) to the second position, the outer cover 4 rotates from 0 degrees to 62.5 degrees (i.e., the outer cover 4 rotates 62.5 degrees), and the outer cover 4 drives the driving gear 5 to rotate, thereby driving the driving cam 12 to rotate from 0 degrees to 75 degrees (i.e., the driving cam 12 rotates 75 degrees). During this process, the powder metering wheel 9 is in a stationary state, 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 62.5 degrees), the outer cover 4 drives the driving gear 5 to rotate, and then drives the driving cam 12 to rotate from 0 degrees to 75 degrees (i.e., the driving cam 12 rotates 75 degrees). That is, the outer cover 4 rotates 87.5 degrees), the outer cover 4 drives the driving gear 5 to rotate, and then drives the driving cam 12 to rotate from 75 degrees to 180 degrees (that is, the driving cam 12 rotates 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, and 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 105 degrees during this process. That is, when the dosage cup 902 of the powder metering wheel 9 rotates from the powder outlet 713 position to the inlet 704 position of the inhalation channel 706, the rotation angle of the powder metering wheel 9 is 105 degrees.

[0253] 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 dosage cup 902 of the powder metering wheel 9 rotates from the powder outlet 713 position of the powder container 7 to the inlet 704 position of the inhalation channel 706. The powder delivery mechanism in this process realizes the powder delivery process. During the opening process of the outer cover 4, a second opening load stroke is performed within this rotation range, which requires a large torque. The torque of the outer cover 4 in the second opening load stroke is constant. Preferably, the torque of the outer cover 4 in the second opening load stroke is 0.1 N·m, ensuring that the outer cover 4 opens at a uniform and stable speed without sudden torque changes until the opening is completed, thereby ensuring the powder delivery effect and avoiding powder leakage or flying waste.

[0254] The outer cover 4 is linked with the powder metering wheel 9 and the air compression mechanism. When the outer cover 4 is configured in the first position, the airbag pressure member 17 is limited to the fifth position. When the outer cover 4 rotates from the first position to the second position, the airbag pressure member 17 is first released from the limit, allowing the elastic member 19 to drive the airbag pressure member 17 from the fifth position to the sixth position, and then drive the powder metering wheel 9 to rotate from the third position to the fourth position. When the outer cover 4 reverses and returns to the first position from the second position, it drives the powder metering wheel 9 to reverse and return from the fourth position to the third position, and drives the airbag pressure member 17 to reverse and return from the sixth position to the fifth position.

[0255] After the powder delivery mechanism completes the powder delivery process, the outer cover 4 rotates to the second position, the dosage cup 902 of the powder metering wheel 9 of the powder delivery mechanism is located at a position corresponding to the inlet 704 of the inhalation channel 706, and the outer cover 4 is fully opened to expose the outlet 102 of the suction nozzle 101. The user can inhale at the outlet 102 of the suction nozzle 101, thereby triggering the inhalation trigger mechanism to achieve the inhalation trigger function.

[0256] Referring to Figures 15A to 23B, Figure 15A is a schematic structural diagram of the inhalation trigger device of the powder inhaler provided in Figure 1 when it is in one state on the powder container, Figure 15B is a schematic structural diagram of the inhalation trigger device provided in Figure 15A when it is in another state on the powder container, Figure 16A is a schematic structural diagram of the inhalation trigger device provided in Figure 15A with the powder container removed, Figure 16B is a schematic structural diagram of the inhalation trigger device provided in Figure 15B with the powder container removed, Figure 17A is a schematic structural diagram of the inhalation trigger device provided in Figure 16A at another angle, Figure 17B is a schematic structural diagram of the inhalation trigger device provided in Figure 16B at another angle, Figure 18A is a schematic exploded structural diagram of the counting mechanism of the powder inhaler provided in Figure 1, Figure 18B is a schematic structural diagram of the assembled counting mechanism provided in Figure 18A, Figure 20 is a schematic structural diagram of the dose protection plate of the inhalation trigger device provided in Figure 1, and Figure 21A is a schematic structural diagram of the powder inhaler provided in Figure 1 21B is a schematic cross-sectional view of the assembly of the powder metering wheel and the dose protection plate of the powder inhaler provided in FIG. 1 in another state, FIG. 21C is a partially enlarged schematic view of FIG. 21A , FIG. 21D is a partially enlarged schematic view of FIG. 21B , FIG. 21E is a schematic cross-sectional view of the assembly of the powder metering wheel and the dose protection plate of the powder inhaler provided in FIG. 1 in another state, FIG. 21F is a partially enlarged schematic view of FIG. 21E , FIG. 22A is a schematic structural view of the air intake baffle of the inhalation trigger device of the powder inhaler provided in FIG. 1 at an angle, FIG. 22B is a schematic structural view of the air intake baffle provided in FIG. 22A at another angle, FIG. 22C is a schematic structural view of the air intake baffle provided in FIG. 22A at another angle, FIG. 23A is a schematic structural view of the front shell of the powder inhaler provided in FIG. 1 at an angle, and FIG. 23B is a schematic structural view of the front shell of the powder inhaler provided in FIG. 1 at another angle.

[0257] (3) Inhalation trigger mechanism

[0258] Referring to Figures 15A to 23B , the inhalation trigger mechanism includes an air intake baffle 11 and a dose protection plate 10. The dose protection plate 10 includes a shielding portion 1004, and the air intake baffle 11 and the dose protection plate 10 work in conjunction. The powder inhaler also includes a return torsion spring 15 and a drive torsion spring 16. The air intake baffle 11 and the dose protection plate 10 of the inhalation trigger mechanism, in conjunction with the return torsion spring 15, the drive torsion spring 16, the powder container 7, the powder metering wheel 9, and the drive cam 12, collectively implement the inhalation trigger function.

[0259] 13A and 13B , the powder container 7 also has an airflow channel 708 connected to the inhalation channel 706. The inhalation channel 706 needs to be connected to the outside atmosphere through the airflow channel 708. Referring to FIG. 13A to FIG. 17B , when the inhalation trigger mechanism is in the initial state, the air inlet baffle 11 blocks the airflow channel 708, and the airflow channel 708 is not connected to the outside atmosphere. The shielding portion 1004 of the dose protection plate 10 blocks the powder outlet of the dose cup 902 located at the inlet 704 of the inhalation channel 706. At this time, the inhalation channel 706 cannot be connected to the outside atmosphere through the airflow channel 708. When the negative pressure inside the inhalation channel 706 is greater than the threshold, that is, when the flow rate of the user's inhalation is higher than the working threshold, the inhalation trigger mechanism is triggered. Specifically, the air inlet baffle 11 rotates and opens the airflow channel 708, which is connected to the outside atmosphere. The suction channel 706 is connected to the outside atmosphere through the airflow channel 708. The air inlet baffle 11 triggers the dose protection plate 10 to rotate, causing the blocking portion 1004 of the dose protection plate 10 to deviate and not block the powder outlet of the dose cup 902. The powder outlet of the dose cup 902 is exposed at the inlet 704 of the suction channel 706. The operating threshold can be within the range of 15L / min to 35L / min. Preferably, the operating threshold for triggering the inhalation trigger mechanism is within the range of 20L / min to 25L / min.

[0260] It can be understood that an inhalation trigger mechanism is provided in the powder inhaler. Only when the flow rate of the user's inhalation is higher than the working threshold will the air inlet baffle 11 rotate and open the air flow channel 708, so that the inhalation channel 706 is connected to the outside atmosphere through the air flow channel 708. The rotation of the air inlet baffle 11 will trigger the dose protection plate 10 to rotate so as not to block the powder outlet of the dose cup 902, so that the powder outlet of the dose cup 902 is connected to the inhalation channel 706, and the powder in the dose cup 902 is exposed and carried out and deagglomerated by the airflow in the inhalation channel 706. At this time, the air flow rate is higher and the deagglomeration effect is better, thereby realizing the flow rate threshold control of the powder release, improving the deagglomeration effect of the powder release, and avoiding powder waste.

[0261] 13B and 15A to 22C , a mounting hole 707 is provided on the side wall of the air inlet port of the air flow channel 708 , and the air inlet baffle 11 can be rotatably mounted on the mounting hole 707 . The air inlet baffle 11 is surrounded by the side wall of the air flow channel 708 .

[0262] Specifically, the air inlet baffle 11 includes a baffle body 1110, which is rotatably connected to the sidewall of the airflow channel 708. In one embodiment, the air inlet baffle 11 further includes a rotating shaft 1106, which is disposed at a first end of the baffle body 1110. The rotating shaft 1106 passes through a mounting hole 707 on the sidewall of the end of the airflow channel 708 and is rotatably connected to the mounting hole 707.

[0263] Referring to Figures 9G, 9H, and 13A to 22C, the first surface of the baffle body 1110 has a boss 1101. The first surface is the surface of the baffle body 1110 facing the end of the airflow channel 708. Boss 1101 is defined as a second boss and serves to increase the complexity of the side flow channel. Specifically, the boss 1101 protruding from the outer surface of the baffle body 1110 transforms the side flow channel from a straight flow channel into an "L"-shaped flow channel, thereby increasing the flow resistance of the airflow and achieving a lower trigger flow rate under the same wind-exposed area. This makes it easier to achieve the inhalation trigger function, making it easier for users with weak physical conditions to use the powder inhalation device. The "L"-shaped flow channel refers to a flow channel comprising a curved first and second flow channel sections. The angle between the first and second flow channel sections can be 80-100 degrees, for example, 90 degrees. This will be described in detail later.

[0264] The outer surface of the baffle body 1110 in this application refers to the surface facing the outside of the port of the airflow channel 708, with respect to the port. The outer surface is defined as the surface facing the outside of the port of the airflow channel 708. The boss 1101 can be formed by directly protruding from the outer surface of the baffle body 1110, for example, if the baffle body 1110 is a solid structure. The boss 1101 can also be formed by being recessed from the baffle body 1110, that is, by bending a portion of the baffle body 1110 toward the outside of the port of the airflow channel 708 to form the boss 1101. This allows the baffle body 1110 to be a simple frame, reducing the weight of the intake baffle 11. The boss 1101 can be integrally formed with the baffle body 1110, or it can be directly attached and fixed to the outer surface of the baffle body 1110 to form the boss 1101.

[0265] In one embodiment, boss 1101 covers the central area of ​​the surface of baffle body 1110 outside the port facing airflow channel 708. The projection of boss 1101 on baffle body 1110 is similar in shape to baffle body 1110 and covers more than 60% of the area of ​​baffle body 1110. This further increases the flow resistance of the side flow channel, ensures the consistency of the inhalation resistance at each stage of the powder inhaler's drug administration process, improves the drug administration effect of the powder inhaler, and thereby enhances user compliance and provides a better user experience. The area of ​​baffle body 1110 covered by the projection of boss 1101 on baffle body 1110 is related to the width of annular surface 1109 and can be designed as needed.

[0266] In other embodiments, the boss 1101 covers other areas of the surface of the baffle body 1110 outside the port facing the airflow 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 improve the flow resistance of the airflow.

[0267] In one embodiment, the height of the boss 1101 gradually decreases 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), so that the top surface of the boss 1101 forms a slope. The slope has a certain flow-guiding effect, which is convenient for guiding the direction of the airflow, so as to facilitate the realization of the inhalation trigger function.

[0268] Specifically, referring to Figures 9G, 9H, 15A, 15B, and 22A to 23B, the front housing 1 includes a nozzle 101, which is positioned corresponding to and connected to the inhalation channel 706. The sidewall of the front housing 1 is provided with an air inlet 104 and a grille 103, which protrudes from the outer wall of the front housing 1. The air inlet 104 connects the outside atmosphere to the space inside the housing assembly. In one embodiment, the grille 103 corresponds to a position above the nozzle 101 and is adjacent to the air inlet 104. The grille 103 protrudes from the outer wall of the front housing 1 to prevent the user's lips from contacting the air inlet 104 when inhaling powder from the nozzle 101, thereby blocking the air inlet 104 and causing problems such as poor air intake or the inability of the outside atmosphere to enter the housing assembly through the inlet 109. As shown in Figure 23B, in a preferred embodiment, the side wall of the front housing 1 is provided with three air inlets 104 and two grilles 103, and the grilles 103 are arranged alternately with the air inlets 104. In other embodiments, the air inlets 104 and grilles 103 can be arranged in other positions, and they can also be arranged in any other number.

[0269] As shown in Figure 22C, along the circumference of boss 1101, the outer peripheral side of boss 1101 and the outer peripheral side of baffle body 1110 are evenly spaced. The portion of the surface of baffle body 1110 outside the port of air flow channel 708 that is not covered by boss 1101 forms annular surface 1109. Annular surface 1109 and the outer peripheral side of boss 1101 are both used to cooperate with the front shell 1 of powder inhaler to form an L-shaped inlet air duct. Specifically, as shown in Figure 23A and Figure 23B, the inner wall surface of front shell 1 is provided with annular flange 111, and annular flange 111 is provided around air inlet 104. Specifically, annular flange 111 is provided around three air inlets 104 and two grilles 103. Referring to Figures 9C to 9H, one end of annular flange 111 is provided in air flow channel 708, and the sidewall of front shell 1 blocks the port of air flow channel 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 air inlet baffle 11 are spaced apart and cooperate to form a first flow channel segment. The end surface of the annular flange 111 distal from the front housing 1 abuts and cooperates with the annular surface 1109 of the air inlet baffle 11 to form a second flow channel segment. The first and second flow channels are interconnected to form an L-shaped inlet flow channel Q1. Specifically, before the inhalation trigger mechanism is triggered, ambient air enters the interior space of the housing assembly through the air inlet 104 on the front housing 1. The L-shaped inlet flow channel Q1 formed by the baffle body 1110, the boss 1101 of the air inlet baffle 11, and the annular flange 111 of the front housing 1 allows ambient air to enter the powder inhaler, ensuring consistent inhalation resistance at all stages of the powder inhaler's dosing process. This prevents excessive inhalation resistance within the powder inhaler before inhalation triggering, which could affect the air compression or powder delivery process, thereby improving the powder inhaler's dosing efficacy.

[0270] When the user inhales from the nozzle 101 and the negative pressure inside the inhalation channel 706 is greater than the threshold, that is, when the airflow velocity when the user inhales is greater than the working threshold, the internal negative pressure will push the air intake baffle 11 to rotate and open the airflow channel 708, and the airflow channel 708 is connected to the outside atmosphere through the air inlet 104.

[0271] As shown in Figures 9G and 9H, the distance between the top surface of the boss 1101 of the air intake baffle 11 and the surface outside the port of the baffle body 1110 facing the air flow channel 708 is a first distance L1, that is, the height of the boss 1101 is L1, the thickness of the annular flange 111 on the inner wall surface of the front shell 1 is a second distance L2, and 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 and outer sides of the air intake baffle 11, that is, increase the pressure difference between the side of the air intake baffle 11 close to the air flow channel 708 and the side of the air intake baffle 11 close to the air inlet 104 of the front shell 1, increase other resistances, and increase the pressure difference on both sides of the air intake baffle 11. It can be more conducive to pushing the air intake baffle 11 to rotate to open the air flow channel 708, thereby making it easier to realize the intake trigger function.

[0272] In one embodiment, the air intake baffle 11 also includes a rotating member 1108, a rotating shaft 1106 is arranged 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, and the first end of the rotating member 1108 has a curved surface, and the curved surface faces the outside of the port of the air flow channel 708 (specifically, the line connecting the two ends of the curved surface is basically parallel to the baffle body 1110). Specifically, the curved surface can be an arc-shaped surface, and the curved surface is used to guide the airflow so that the airflow path lengths on both sides of the baffle body 1110 are consistent.

[0273] Specifically, referring to Figures 9C, 13A, 13B, 15A and 15B, the side wall of the air flow channel 708 of the powder container 7 is connected to the side wall of the storage chamber 715, and the side wall of the air flow channel 708 is connected to one end of the side wall of the storage chamber 715. A first guide hole 710 and a second guide hole 717 are provided, which are spaced apart from each other. The end of the suction channel 706 close to the suction nozzle 101 has a first air flow inlet 718 and a second air flow inlet 719 which are spaced apart from each other. The first guide hole 710 connects the air flow channel 708 and the first air flow inlet 718, and the second guide hole 717 connects the air flow channel 708 and the second air flow inlet 719. The inner wall surface of the front shell 1 and the outer wall surface of the suction channel 706 are spaced apart to form a guide channel 720 (as shown in Figure 9C). The guide channel 720 connects the air flow channel 708 and the first air flow inlet 718 and the second air flow inlet 719. Referring to Figure 15B, when the flow rate of the user's inhaled airflow is greater than the working threshold and the negative pressure inside the inhalation channel 706 is greater than the threshold, the air intake baffle 11 rotates and opens the airflow channel 708, and the air inlet 104 on the front shell 1 passes through the first guide hole 710 and the second guide hole 717 through the airflow channel 708. After the outside atmosphere enters the shell assembly through the air inlet 104 of the front shell 1, part of the gas flows to the first guide hole 710 through the airflow channel 708, part of the gas flows to the second guide hole 717 through the airflow channel 708, and the remaining gas flows to the guide channel 720 through the airflow channel 708. The gas flowing out of the first guide 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 into the first air inlet 718. The gas flowing out of the second guide 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 into the second air inlet 719. The gas flowing out of the guide channel 720 can enter the first air inlet 718 and the second air inlet 719 simultaneously, facilitating the inhalation of powder through the inhalation channel 706. It can be understood that by providing three air inlets 104 of the front shell 1, and respectively providing the first guide hole 710, the second guide hole 717, and the guide channel 720, the ventilation cross-sections of the three air flows can be consistent with the ventilation cross-sections of the three air inlets 104 of the front shell 1, thereby avoiding gas loss during air intake. At the same time, the first curved surface 1103 and the second curved surface 1104 are both curved surfaces, which can guide the direction of the air flow and make the airflow paths on both sides of the baffle body 1110 of the same length.

[0274] In one embodiment, as shown in Figures 13B and 15B , the interior of the inhalation channel 706 includes two opposing arcuate ribs. These arcuate ribs, along with the sidewalls of the inhalation channel 706, form a vortex-shaped airway. Air enters the inhalation channel 706 through the first air inlet 718 and the second air inlet 719, respectively, and forms a vortex. The vortex carries the powder in the dosage cup 902 at the inlet 704 of the inhalation channel 706 into the inhalation channel 706. After deaggregation in the inhalation channel 706, the powder ultimately flows toward the mouthpiece 101 for inhalation by the user. This arrangement further facilitates the deaggregation of powdered substances such as medicine within the inhalation channel 706, thereby avoiding powder waste and improving powder utilization.

[0275] 22A to 22C , the second end of the rotating member 1108 has a raised cylinder 1102 on a surface away from the baffle body 1110 , which is defined as a third cylinder. The cylinder 1102 is used to abut against the drive arm of the return torsion spring 15 of the powder inhaler, so that the baffle body 1110 fits the front shell 1 . Specifically, in one embodiment, there are two rotating shafts 1106, which are disposed on opposite sides of the baffle body 1110 and are defined as a first rotating shaft 1106a and a second rotating shaft 1106b, respectively. There are two rotating members 1108, which are defined as a first rotating member 1108a and a second rotating member 1108b, respectively. 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 of the first rotating member 1108a has a raised cylindrical surface 1102 on its surface away from the baffle body 1110. 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 a circular arc groove surface 1107.

[0276] In one embodiment, the side of the baffle body 1110 also has a boss 1105 surrounding the rotating shaft 1106. The boss 1105 is spaced apart from the rotating member 1108. The boss 1105 is used to maintain a uniform gap between the two sides of the baffle body 1110 and the side walls of the air flow channel 708, thereby facilitating a more stable implementation of the inhalation trigger function.

[0277] 13A and 13B, and 15A to 22C, the powder container 7 further comprises a second cylindrical groove 712, which is coaxially disposed opposite the first cylindrical groove 716 and shares a common bottom wall (not shown). The counting mechanism and the dose protection plate 10 are mounted within the second cylindrical groove 712. Referring to FIG15A to 19B, the counting mechanism includes a counter base 21 having a cylindrical shaft 2111. The dose protection plate 10 and the counter base 21 of the counting mechanism are both mounted within the second cylindrical groove 712 of the powder container 7, with the counter base 21 limiting the axial position of the dose protection plate 10. The powder inhaler also includes a drive torsion spring 16 and a return torsion spring 15. The drive torsion spring 16 is mounted on the cylindrical shaft 2111 of the counter base 21. The counter base 21 is provided with a limit groove 2109. The fixed arm of the drive torsion spring 16 is fixed by the limit groove 2109 on the counter base 21. The return torsion spring 15 is mounted on the gear bracket 14.

[0278] 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 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 configured to shield or not shield the dose cup 902. The annular body 1000 is disposed within the second cylindrical groove 712 of the powder container 7. As shown in FIG18B , the annular body 1000 is configured to accommodate a counting mechanism. The sidewall 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 and can rotate back and forth within the notch. As shown in Figure 20, the surface of the clamping member 1006 away from the annular body 1000 includes a clamping arc surface 1002. When the inhalation trigger mechanism is in the initial state, that is, before it is triggered or after the inhalation trigger mechanism is reset, the arc groove surface 1107 of the rotating member 1108 of the air inlet baffle 11 cooperates with the clamping arc surface 1002 of the dose protection plate 10 to achieve concentric arc surface compression.

[0279] The shielding portion 1004 is connected to one end of the annular body 1000 and is used to shield or not shield the dosage cup 902. As shown in FIG13B , the common bottom wall of the powder container 7 has an arc-shaped notch (not shown), 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. The shielding portion 1004 can rotate back and forth in the arc-shaped notch, so that before the inhalation trigger mechanism is triggered, it is located at the inlet 704 of the inhalation channel 706 and shields the dosage cup 902 at this position. After the inhalation trigger mechanism is triggered, the shielding portion 1004 rotates in the arc-shaped notch away from the inlet 704 of the inhalation channel 706 to not shield the dosage cup 902, so that the powder in the dosage cup 902 is exposed for easy inhalation.

[0280] Specifically, referring to Figures 15A to 17B and Figure 20, the pressing member 1006 includes a cylindrical convex surface 1001, which is provided on one side of the pressing arc surface 1002. As shown in Figures 16A and 16B, 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 exceeds the working threshold, when the air intake baffle 11 rotates, the pressing arc surface 1002 of the dose protection plate 10 is disengaged from the arc groove surface 1107 of the air intake baffle 11, and 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 dosage cup 902 of the powder metering wheel 9 to not shielding, so that the powder in the dosage cup 902 of the powder metering wheel 9 is exposed to the airflow to be inhaled by the user.

[0281] The following specifically introduces the movement mode of the inhalation trigger mechanism during the inhalation trigger process.

[0282] 9D and 15A to 22C , before the outer cover 4 is fully opened, as shown in FIG15A , FIG16A , FIG17A , and FIG22A , the driving arm of the return torsion spring 15 acts on the cylinder 1102 of the air inlet baffle 11 , pressing the air inlet baffle 11 against the front housing 1 , with the boss 1101 embedded in the annular flange 111 . The air inlet baffle 11 does not rotate, and the suction channel 706 cannot communicate with the outside atmosphere through the air flow channel 708 . As shown in FIG20 and FIG15A , the driving arm of the drive torsion spring 16 acts on the cylindrical convex surface 1001 of the compression member 1006 of the dose protection plate 10 . At this time, the compression arc surface 1002 of the compression member 1006 of the dose protection plate 10 acts on the arc groove surface 1107 of the rotating member 1108 of the air inlet baffle 11 (as shown in FIG16A ), achieving concentric arc compression.

[0283] The guide groove 1209 of the driving cam 12 is located on the surface of the main body 1200 facing the gear 1203, and the surface of the main body 1200 facing away from the gear 1203 has a rib 1208. When the outer cover 4 is opened and in place, 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 reset torsion spring 15 away from the cylinder 1102 of the air intake baffle 11 (as shown in Figure 17B). The rib 1208 releases the limit of the reset torsion spring 15 on the air intake baffle 11 of the inhalation trigger mechanism. At this time, the air intake baffle 11 is not affected by the tightening force of the reset torsion spring 15, and only the compression friction force of the compression arc surface 1002 of the dose protection plate 10 on the arc groove surface 1107 of the air intake baffle 11 remains. At the same time, after the outer cover 4 rotates to the second position, the dosage cup 902 of the powder metering wheel 9 is delivered to the inlet 704 of the inhalation channel 706 , and the shielding portion 1004 of the dosage protection plate 10 is located at the inlet 704 of the inhalation channel 706 and shields the powder outlet of the dosage cup 902 .

[0284] After the outer cover 4 is fully opened and before the inhalation trigger mechanism is triggered, the air inlet baffle 11 only experiences the frictional force exerted by the compression arc surface 1002 of the dose protection plate 10 on the arcuate groove surface 1107 of the air inlet baffle 11, and the air inlet baffle 11 remains stationary. When the user inhales, and the inhalation airflow velocity exceeds the operating threshold, and the negative pressure within the inhalation channel 706 exceeds the threshold, the thrust generated by the inhalation airflow acts on the air inlet baffle 11, overcoming the frictional force exerted by the compression arc surface 1002 on the arcuate groove surface 1107. The inhalation trigger mechanism is triggered, and the air inlet baffle 11 undergoes yaw rotation. After the air inlet baffle 11 rotates, the arc groove surface 1107 of the air inlet baffle 11 rotates synchronously, and the pressing arc surface 1002 of the dose protection plate 10 is disengaged from the arc groove surface 1107 of the air inlet 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 in the arc-shaped notch, so that the shielding portion 1004 of the dose protection plate 10 deviates and does not block 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 to the inhalation channel 706. Under the action of the user's inhalation airflow, the powder in the dose cup 902 flows through the inhalation channel 706 and the suction nozzle 101 and is inhaled by the user. In a preferred embodiment, the dose protection plate 10 rotates downward 38 degrees under the driving force of the drive torsion spring 16, so that the powder outlet of the dose cup 902 is connected to the suction channel 706, and the powder in the dose cup 902 is exposed to the airflow and taken away.

[0285] 14B and 20 , the dose protection plate 10 further includes a wedge-shaped post 1005. One end of the wedge-shaped post 1005 is connected to the annular body 1000 and is spaced apart from both the shielding portion 1004 and the pressing member 1006. The other end of the wedge-shaped post 1005 is configured to engage 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 via the wedge-shaped post 1005. The specific process and manner in which the driving spring arm 910 drives the dose protection plate 10 to rotate and reset via the wedge-shaped post 1005 will be described in detail later in the process of resetting the triggering mechanism upon closing the outer cover 4, and will not be further elaborated here.

[0286] Referring to Figure 20 , the dose protection plate 10 further includes a spring-loaded hook 1003 . One end of the spring-loaded hook 1003 is connected to the annular body 1000 . Specifically, one end of the spring-loaded hook 1003 is connected to the inner wall of the annular body 1000 , and the other end of the spring-loaded hook 1003 is used to drive a counting mechanism for counting. The counting mechanism, the method by which the spring-loaded hook 1003 drives the counting mechanism for counting, and the counting process are described in detail below.

[0287] 24A to 25 , FIG24A is a schematic structural diagram of the units digit wheel of the counting mechanism provided in FIG18A at one angle, FIG24B is a schematic structural diagram of the units digit wheel provided in FIG24A at another angle, and FIG25 is a schematic structural diagram of the tens digit wheel of the counting mechanism provided in FIG18A .

[0288] (4) Counting mechanism

[0289] 18A, 18B, and 22A to 25, the counting mechanism includes a counter base 21, a tens wheel 22, a units wheel 23, and a counter intermediate gear 24. The counting mechanism achieves a counting function in cooperation with the dose protection plate 10 and the powder container 7. Specifically, the tens wheel 22 is mounted on the counter base 21. The counter base 21 has a cylindrical surface 2101, a spring catch 2102, and an outer arcuate boss 2108. The tens wheel 22 has an inner ring 2203 and an inner arcuate boss 2205. The cylindrical surface 2101 of the counter base 21 cooperates with the inner ring 2203 of the tens wheel 22 to achieve coaxial rotation. The spring catch 2102 on the counter base 21 axially limits the tens wheel 22. The outer arcuate boss 2108 of the counter base 21 cooperates with the inner arcuate boss 2205 of the tens wheel 22 to limit the rotation of the tens wheel 22.

[0290] 4 and 25 , a digital display window 201 is provided on the housing assembly. Specifically, a digital display window 201 is provided on the rear housing 2 of the housing assembly, and the tens digit wheel 22 also has a full-red warning feature 2201. When the full-red warning feature 2201 of the tens digit wheel 22 is displayed in the digital display window 201 on the rear housing 2, the tens digit wheel 22 is limited and no longer rotates.

[0291] The counter base 21 is further provided with a first mounting hole 2103 , and the counter intermediate gear 24 is mounted on the first mounting hole 2103 on the counter base 21 . The counter intermediate gear 24 meshes with the gear features of the tens digit wheel 22 to achieve transmission.

[0292] The units digit wheel 23 has a second mounting hole 2303 and a toothed shift post 2301. The counter base 21 is provided with a buckle post 2105. 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 position limiting. The units digit wheel 23 has an annular guide structure 2305 for mating with the tens digit wheel 22. The outer circumference of the units digit wheel 23 is printed with a first numeral 2302, while the outer circumference of the tens digit wheel 22 is printed with a second numeral 2202 to facilitate counting. The toothed stud 2301 on the ones digit wheel 23 cooperates with the counter intermediate gear 24. When the ones digit wheel 23 completes one rotation and jumps from the number "0" to the number "9", the toothed stud 2301 on the ones digit wheel 23 drives the counter intermediate gear 24 to rotate two teeth. At the same time, the tens digit wheel 22 engages with the counter intermediate gear 24, and the tens digit wheel 22 synchronously rotates two teeth to achieve a one-digit jump.

[0293] Referring to Figures 16A to 20, the units digit wheel 23 is driven by the reciprocating motion of the dose protection plate 10. Specifically, as shown in Figure 24A, a ratchet 2304 is provided on the units digit wheel 23. Referring to Figure 20, the dose protection plate 10 has an elastic arm hook 1003, one end of which is connected to the annular body 1000. The ratchet 2304 on the units digit wheel 23 cooperates with the elastic arm hook 1003 of the dose protection plate 10. Before the inhalation trigger mechanism is triggered, the elastic arm hook 1003 hooks one of the ratchet teeth 2304 on the units digit wheel 23. When the inhalation trigger mechanism is triggered, the air intake baffle 11 rotates, thereby triggering the dose protection plate 10 to rotate under the action of the drive arm of the drive torsion spring 16. The dose protection plate 10 is rotated. The rotation of the protection plate 10 causes the elastic arm hook 1003 to rotate synchronously, and after the rotation, the elastic arm hook 1003 hooks the next ratchet 2304 on the units digit wheel 23; during the closing process of the outer cover 4, the air inhalation trigger mechanism is reset, the dose protection plate 10 reverses and returns to its original state before the air inhalation trigger mechanism is triggered. Since the elastic arm hook 1003 of the dose protection plate 10 hooks the next ratchet 2304 of the units digit wheel 23, during this process, the dose protection plate 10 reverses and hooks the ratchet 2304 and also rotates, and the units digit wheel 23 rotates under the action of the elastic arm hook 1003 to achieve a digital jump.

[0294] In a preferred embodiment, the units digit wheel 23 is provided with ten ratchet teeth 2304. When the inhalation trigger mechanism is activated, the dose protection plate 10 is triggered to rotate 38 degrees, and the elastic arm hook 1003 hooks onto the next ratchet tooth 2304. When the inhalation trigger mechanism is reset, the dose protection plate 10 rotates 38 degrees, and the units digit wheel 23, under the action of the elastic arm hook 1003, rotates 36 degrees to achieve a digit jump.

[0295] Furthermore, the powder container 7 is provided with a limit spring arm 711. Specifically, as shown in FIG13B , the second cylindrical groove 712 of the powder container 7 is provided with a limit spring arm 711 on its side. The limit spring arm 711 is used to limit the unidirectional rotation of the counting mechanism. The limit spring arm 711 provided on the powder container 7 cooperates with the ratchet 2304 on the units digit wheel 23 to achieve unidirectional rotation of the units digit wheel 23. Specifically, when the dose protection plate 10 rotates downward, the spring arm hook 1003 on the dose protection plate 10 scrapes against the units digit wheel 23. Due to the action of the limit spring arm 711 on the ratchet 2304 of the units digit wheel 23, the units digit wheel 23 does not rotate with the dose protection plate 10. When the dose protection plate 10 returns to its original position, the spring arm hook 1003 on the dose protection plate 10 hooks and pulls the units digit wheel 23 to rotate 36°, achieving unidirectional down counting. The above arrangement can effectively prevent the elastic arm hook 1003 from driving the units digit wheel 23 when the dose protection plate 10 rotates downward, thereby preventing the counter from abnormally occurring.

[0296] For ease of understanding, the following describes the coordination of various functional mechanisms in conjunction with the cover closing process, as well as how to trigger the counting mechanism to count and how to reset various functional mechanisms during the cover closing process.

[0297] The closing process of the outer cover 4, i.e., the process of the outer cover 4 reversing from the second position to the first position, drives the powder delivery mechanism and the air compression mechanism to reset respectively, and triggers the air inlet baffle 11 to reverse and reset, so that the powder inhaler returns to its original state; wherein, the dose protection plate 10 is reset and drives the counter to achieve a digit count.

[0298] 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 closing process of the outer cover 4 (the process of the outer cover 4 returning to the first position from the second position), that is, during the process of the outer cover 4 rotating from 150 degrees to 0 degrees, the outer cover 4 first rotates for a period of idle travel, and the outer cover 4 drives the driving cam 12 to rotate for a period of idle travel. Preferably, the outer cover 4 first rotates for a period of idle travel of 62.5 degrees, and the corresponding driving cam 12 rotates for a period of idle travel of 75 degrees. That is, at the end of the idle travel of the outer cover 4 closing, the angle of the outer cover 4 is 87.5 degrees, and the angle of the driving cam 12 is 105 degrees. As the outer cover 4 rotates from 87.5 degrees to 0 degrees, the drive cam 12 drives the powder metering wheel 9 to rotate and reset, rotating it from the fourth position to the third position. The dosage 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 resetting the powder delivery mechanism. During this process, the drive cam 12 rotates from 105 degrees to 0 degrees. When the outer cover 4 returns to the first position, i.e., when the cover is closed, the arcuate rib 405 on the outer cover 4 cooperates with the acoustic spring arm 108 on the front housing 1 to produce an audible prompt indicating that the cover is closed properly, prompting the outer cover 4 to be fully closed.

[0299] Since the outer cover 4 and the driving gear 5 are driven by a gear meshing transmission, there is a gear gap, which causes the outer cover 4 to be unable to close tightly with the front housing 1 after closing. In order to eliminate the problem of the outer cover 4 being unable to close with the front housing 1 due to the gear gap after closing, as shown in Figures 8A and 8B, a tightening elastic arm 502 is provided on the driving gear 5. The tightening elastic arm 502 is defined as a second tightening elastic arm. A limiting boss 106 is provided on the front housing 1. The tightening elastic arm 502 cooperates with the limiting boss 106 of the front housing 1 to achieve tightening closure, so that the outer cover 4 and the front housing 1 are tightly fitted, ensuring that the cover is closed in place. At the same time, during the opening process of the outer cover 4, that is, during the process of the outer cover 4 rotating from the first position to the second position, the initial opening idle stroke is the outer cover 4. The rotation of the outer cover 4 needs to overcome the resistance of the limiting boss 106 to the tightening elastic arm 502, so that the tightening elastic arm 502 can pass over the limiting boss 106 to facilitate the rotation of the outer cover 4, thereby preventing the cover from being opened accidentally due to non-human factors.

[0300] 5A, 6A, 7A, and 7B, a limiting groove 403 is further provided on the connecting portion 406 of the outer cover 4, which is provided with the arcuate rib 405, and a limiting protrusion 107 is further provided on the front housing 1. When the outer cover 4 is closed, i.e., when the outer cover 4 is in the first position, the limiting protrusion 107 is engaged in the limiting groove 403 to limit the outer cover 4 in the first position. The cooperation between the limiting groove 403 and the limiting protrusion 107 of the front housing 1 achieves a tight closure between the outer cover 4 and the front housing 1, achieving a good fit between the outer cover 4 and the front housing 1 without a gap due to incomplete closure. At the same time, at the beginning of the opening process of the outer cover 4, i.e., within the opening idle stroke of the outer cover 4, the force of the limiting groove 403 on the limiting protrusion 107 needs to be overcome, so that the limiting protrusion 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.

[0301] It can be understood that a limiting boss 106 and a tightening elastic arm 502 are set at a position corresponding to one of the connecting parts 406 of the outer cover 4, and a limiting groove 403 and a limiting boss 107 are set at a position corresponding to the other connecting part 406, and the closing limit is performed on the opposite sides of the outer cover 4, so that when the outer cover 4 is in the first position, the opposite sides of the outer cover 4 can achieve a good fit with the front shell 1, effectively avoiding the problem that the outer cover 4 is not closed in place, the outer cover 4 and the front shell 1 are closed on one side and there is a gap on the other side, thereby ensuring the consistency of the closed state.

[0302] During the closing process of the outer cover 4, since the tip of the protruding rod 1704 of the airbag pressing piece 17 is limited in the stop groove 1213, it is necessary to first drive the tip of the protruding rod 1704 of the airbag pressing piece 17 out of the stop groove 1213, that is, it is necessary to overcome the resistance of the stop groove 1213 to the tip of the protruding rod 1704 of the airbag pressing piece 17. During this process, the outer cover 4 performs the first idle stroke for closing the cover, and the outer cover 4 reverses from 150 degrees to 140 degrees, which requires a larger torque. Preferably, in the first idle stroke for closing the cover, the torque of the outer cover 4 is 0.05 N·m, and the driving cam 12 rotates so that the tip of the protruding rod 1704 of the airbag pressing piece 17 is out of the stop groove 1213 and abuts against the second curved surface segment 1212, which can effectively prevent the cover from being closed accidentally due to non-human factors.

[0303] During the rotation of the outer cover 4 from 140 degrees to 87.5 degrees, the outer cover 4 drives the drive cam 12 to rotate 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 lid closing idle stroke, and only the second drive cam 12 rotates and resets. The tip of the protruding rod 1704 of the airbag pressing member 17 abuts the second curved surface segment 1212. Because 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, there is no need to drive the powder metering wheel 9 to rotate or reset the airbag pressing member 17. The torque required for the outer cover 4 during the second lid closing idle stroke is small and constant. Preferably, the torque of the outer cover 4 during the second lid closing idle stroke is 0 N·m, which accelerates the lid closing process and increases the smoothness of the lid closing.

[0304] When the outer cover 4 rotates 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 rotating the outer cover 4 from 87.5 degrees to 62.5 degrees, the drive cam 12 is driven to rotate from 105 degrees to 75 degrees. During this process, the outer cover 4 performs the first lid 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 rotate. 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 reset. The tip of the protruding rod 1704 of the airbag pressing member 17 still abuts the second curved surface segment 1212, and the airbag pressing member 17 is still in the sixth position. Because the outer cover 4 needs to drive the powder metering wheel 9 to rotate and reset during the first lid load stroke, a large constant torque is required. Preferably, the torque of the outer cover 4 during the first lid load stroke is 0.1 N·m to ensure that the powder metering wheel 9 can be driven to rotate.

[0305] Furthermore, in the process of closing the outer cover 4, in a preferred embodiment, when the outer cover 4 is reversed from 62.5 degrees to 0 degrees, the driving cam 12 is reversed from 75 degrees to 0 degrees, and the first curved surface segment 1211 of the cam surface 1202 on the driving cam 12 cooperates with the curved surface 1703 of the airbag pressure piece 17. When the driving cam 12 is reversed, the first curved surface segment 1211 of the cam surface 1202 continuously lifts the airbag pressure piece 17 until the curved surface 1703 of the airbag pressure piece 17 falls into the arc groove 1201 of the driving cam 12, thereby completing the resetting of the air compression mechanism.

[0306] 21A to 21F , specifically, during the closing process of the outer cover 4, in a preferred embodiment, the outer cover 4 is rotated from 56 degrees to 25 degrees, and the driving cam 12 is rotated 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.

[0307] Specifically, during the rotation of the outer cover 4 from 87.5 degrees to 56 degrees, as shown in Figures 21A and 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, and during this process, the dose protection plate 10 does not rotate. Referring to Figures 21B and 21D , when the outer cover 4 rotates to 56 degrees, the driving spring arm 910 on the powder metering wheel 9 begins to contact the wedge-shaped column 1005 of the dose protection plate 10. During the rotation of the outer cover 4 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 rotation of the driving cam 12 drives the powder metering wheel 9 in reverse, and 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 causes the dose protection plate 10 to rotate 38 degrees, thereby resetting the dose protection plate 10. During the process of the outer cover 4 rotating from 8 degrees to 0 degrees, the dose protection plate 10 has been reset and no longer rotates. During this process, only the powder metering wheel 9 is still rotating. Referring to Figures 21E and 21F, the driving elastic arm 910 on the powder metering wheel 9 will pass over the wedge-shaped column 1005 of the dose protection plate 10. When the outer cover 4 is rotated to 0 degrees, the powder metering wheel 9 is reset to its proper position, the limiting protrusion 107 is locked in the limiting groove 403, and the tightening elastic arm 502 acts on the limiting boss 106 to ensure that the outer cover 4 is closed in place.

[0308] Before the outer cover 4 is fully closed, when the outer cover 4 rotates to 12.5 degrees, the driving cam 12 rotates to 15 degrees, and the rib 1208 on the driving cam 12 disengages the driving arm of the return torsion spring 15. The driving arm of the return torsion spring 15 then re-acts on the cylinder 1102 on the air intake baffle 11, providing a reset force for the air intake baffle 11. Under the reset and pressing force of the return torsion spring 15 on the air intake baffle 11, the air intake baffle 11 rotates and resets. The compression arc surface 1002 of the dose protection plate 10 re-acts on the arc groove surface 1107 of the air intake baffle 11 to achieve concentric arc compression, and the dose protection plate 10 of the inhalation trigger mechanism is reset. When the outer cover 4 rotates from 8 degrees to 0 degrees, the driving spring arm 910 on the powder metering wheel 9 passes over the wedge-shaped column 1005 on the dose protection plate 10. During this process, the outer cover 4 performs the third closing load stroke, driving the powder metering wheel 9 to continue to rotate, while the dose protection plate 10 has already reset and no longer rotates. After the driving spring arm 910 on the powder metering wheel 9 passes over the wedge-shaped column 1005 on the dose protection plate 10, the driving spring arm 910 no longer applies force to the wedge-shaped column 1005. Under the action of the driving torsion spring 16, the compression arc surface 1002 of the dose protection plate 10 will re-act on the circular arc groove surface 1107 of the air intake baffle 11 to achieve concentric arc surface compression. This ensures that after the air inhalation trigger mechanism is reset, the powder metering wheel 9 is also reset, preventing the air inhalation trigger mechanism from failing to reset.

[0309] In the process of the outer cover 4 reversing from 62.5 degrees to 8 degrees, the powder metering wheel 9 needs to be reversed and reset and the airbag press 17 needs to be pushed up and reset at the same time. During this process, the outer cover 4 performs the second-level cover load stroke, which requires a larger torque, and the torque of the second-level cover load stroke gradually increases. Preferably, within the second-level cover load stroke, the torque of the outer cover 4 gradually increases from 0.10N·m to 0.20N·m to ensure that the powder metering wheel 9 and the airbag press 17 can be continuously reset. When the outer cover 4 rotates to 8 degrees, the airbag press 17 is reset, that is, the airbag press 17 is reset to the fifth position, and the tip of the protruding rod 1704 of the airbag press 17 re-sinks into the arc-shaped groove 1201 to limit the airbag press 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 cover load stroke. During this process, it is necessary to overcome the resistance of the powder metering wheel 9 passing over the wedge-shaped column 1005. Preferably, the torque of the outer cover 4 in the third closing cover load stroke is 0.1 N·m until the cover is closed.

[0310] Specifically, during the first and second lid load strokes, the outer cover 4 drives the dose protection plate 10 via the powder metering wheel 9 to reset to a position beyond the inlet 704 of the inhalation channel 706 and compress the drive torsion spring 16. Simultaneously, the reset torsion spring 15 drives the air inlet baffle 11 to reset and rotate, closing the air flow channel 708. During the third lid load stroke, the powder metering wheel 9 is decoupled from the dose protection plate 10. Specifically, the drive spring arm 910 of the powder metering wheel 9 is decoupled from the wedge-shaped column 1005 of the dose protection plate 10. The drive torsion spring 16 drives the dose protection plate 10 to rotate, causing the shielding portion 1004 of the dose protection plate 10 to rotate to the inlet 704 of the inhalation channel 706 and be restrained by the inlet baffle 11 at the inlet 704 of the inhalation channel 706.

[0311] 26 and 27 , FIG. 26 is a schematic cross-sectional view of another embodiment of the powder inhaler provided by the present application, and FIG. 27 is a schematic cross-sectional view of yet another embodiment of the powder inhaler provided by the present application.

[0312] The powder inhaler shown in FIG1 utilizes an air compression mechanism and a large-sized powder outlet 713 for powder filling. In this embodiment, referring to FIG9C and FIG9D , the cross-sectional area of ​​the powder outlet 713 of the powder container 7 is larger than the cross-sectional area of ​​the dosage cup 902 on the powder metering wheel 9. The larger size of the powder outlet 713 of the powder container 7 enables more efficient air compression and powder filling. In other embodiments, air compression may not be employed in the manner shown in FIG9C .

[0313] For example, as shown in FIG26 , in another embodiment, the powder inhaler may not include an air compression mechanism, and may directly utilize a large-sized powder outlet 713, 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 dosage cup 902 on the powder metering wheel 9. Since the axis of the housing assembly of the powder inhaler provided in each embodiment of the present application is always parallel to the vertical direction during the opening and closing of the outer cover 4, during the powder filling process, the powder outlet 713 at the bottom of the storage chamber 715 is always located directly above the dosage cup 902 of the powder metering wheel 9 along the vertical direction. Therefore, the powder in the powder container 7 can be directly filled into the dosage cup 902 of the powder metering wheel 9 by relying on the gravity of the powder in the storage chamber 715 of the powder container 7, thereby achieving powder filling.

[0314] Alternatively, as shown in FIG27 , in another embodiment, a pneumatic compression mechanism can also be provided in the powder inhaler. However, the powder outlet 713 of the powder container 7 is configured 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 dosage cup 902 on the powder metering wheel 9. The cross-sectional shape of the powder outlet 713 can be circular or other shapes, and the diameter of the powder outlet 713 is between 1 mm and 3 mm. The pneumatic compression mechanism can be used to compact the powder in the powder container 7 and fill it into the dosage cup 902 on the powder metering wheel 9, thereby achieving powder filling. The specific configuration of the pneumatic compression and powder filling can be designed or selected as needed and is not limited in this application.

[0315] The following describes the specific operating state of the powder inhaler from the opening to the closing process, that is, the outer cover 4 rotates from the first position (0 degrees) to the second position (150 degrees), the user takes an inhalation, and the outer cover 4 rotates from the second position (150 degrees) to the first position (0 degrees).

[0316] (1) Opening process

[0317] The opening process of the outer cover 4, that is, the process of the outer cover 4 rotating from the first position (0 degrees) to the second position (150 degrees), includes the opening idle stroke, the air compression process and the powder delivery process in chronological order.

[0318] (1) Opening empty travel

[0319] During the lid opening idle stroke, the outer cover 4 rotates from 0 to 12 degrees. The rotation from 0 to 8 degrees is to prevent the outer cover 4 from opening due to unintentional factors, while the rotation from 8 to 12 degrees is to prevent accidental opening. When the outer cover 4 is in the first position, i.e., 0 degrees, the outer cover 4 covers the nozzle 101.

[0320] (2) Compression process

[0321] During the compression process, the outer cover 4 rotates from 12 degrees to 62.5 degrees. The compression function is achieved during the rotation from 12 degrees to 55 degrees, compacting the powder in the storage chamber 715 of the powder container 7 and filling it into the dosage cup 902 of the powder metering wheel 9. When the outer cover 4 rotates to 55 degrees, the pressure relief hole 1702 and the vent hole 709 are at a critical point of communication. During the rotation from 55 degrees to 62.5 degrees, the pressure relief hole 1702 and the vent hole 709 communicate, achieving a pressure relief function and releasing the compressed gas in the storage chamber 715 of the powder container 7 to normal pressure, thereby preventing powder leakage during the rotation of the powder metering wheel 9. During this process, the outer cover 4 can be opened instantaneously when the cover is opened, allowing the compression mechanism to rapidly compress the gas, thereby improving the compression effect.

[0322] (3) Powder delivery process

[0323] During the powder delivery process, the outer cover 4 rotates from 62.5 degrees to 150 degrees. This rotation drives the drive cam 12, causing the annular boss 1207 of the drive cam 12 to engage 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, causing the powder metering wheel 9 to rotate from the third position to the fourth position. The dosage cup 902 of the powder metering wheel 9 rotates from corresponding to the powder outlet 713 of the storage chamber 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 arcuate rib 405 on the outer cover 4 cooperates with the acoustic spring arm 108 on the front housing 1 to produce an audible prompt indicating that the outer cover 4 is fully opened.

[0324] (2) Inspiratory triggering process

[0325] After the powder delivery process is completed, the dosage cup 902 of the powder metering wheel 9 is delivered to the position corresponding to the inlet 704 of the inhalation channel 706, the shielding portion 1004 of the dose protection plate 10 covers the dosage 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 suction nozzle 101 is exposed. When the user inhales at the outlet 102 of the mouthpiece 101, when the flow rate of the user's inhaled airflow is greater than the working threshold (20L / min to 25L / min) and the negative pressure in the inhalation channel 706 is greater than the threshold, the inhalation trigger mechanism is triggered, the air intake baffle 11 rotates, and the compression arc surface 1002 of the dose protection plate 10 disengages from the circular arc groove surface 1107 of the air 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 shield the dose cup 902 of the powder metering wheel 9. The dose cup 902 is exposed at the inlet 704 of the inhalation channel 706. The dose cup 902 is connected to the inhalation channel 706. The powder in the dose cup 902 is exposed to the user's inhaled airflow and is carried away, completing the inhalation trigger process.

[0326] (3) Closing process

[0327] After the inhalation triggering process is complete, the lid closes. During this process, the outer lid 4 reverses from the second position (150 degrees) to the first position (0 degrees). During this process, the outer lid 4 drives the air compression mechanism, powder metering wheel 9, dose protection plate 10, and air intake baffle 11 to reset. Specifically, the lid closing process includes the lid closing idle stroke and the functional mechanism reset process.

[0328] (1) Closing the cover and empty travel

[0329] During the empty stroke of closing the cover, the outer cover 4 is reversed from 150 degrees to 87.5 degrees (that is, the outer cover 4 is reversed 62.5 degrees). Among them, the process of the outer cover 4 rotating from 150 degrees to 140 degrees is to prevent non-human factors from triggering the closing of the cover. In the later stage of the empty stroke of closing the cover, the outer cover 4 is rotated from 140 degrees to 87.5 degrees.

[0330] (2) Functional mechanism reset process

[0331] During the resetting process of the functional mechanism, the outer cover 4 is reversed from 87.5 degrees to 0 degrees. During this process, the powder metering wheel 9 is continuously reversed and reset from the fourth position to the third position. Among them, during the process of the outer cover 4 rotating from 87.5 degrees to 62.5 degrees, only the powder metering wheel 9 is rotating; during the process of the outer cover 4 rotating from 62.5 degrees to 8 degrees, the powder metering wheel 9 is rotating, and at the same time, the air bag pressure piece 17 is continuously pushed up to reset the air compression mechanism; wherein, during the process of the outer cover 4 rotating 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 clamping 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 compression, and the air suction trigger mechanism is reset; during the process of the outer cover 4 rotating from 8 degrees to 0 degrees, the air compression mechanism has been reset. At this time, the closing stroke overcomes the rotational 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 rib 405 on the outer cover 4 cooperates with the sound spring arm 108 on the front shell 1 to produce a sound prompt indicating that the outer cover 4 is closed.

[0332] As can be seen from the above, the outer cover 4 has different functions in different positions during the opening and closing process, such as idle travel or driving different functional mechanisms. Based on the different functions of the outer cover 4 in different positions during the opening and closing process, the present application designs the torque of the outer cover 4 in different travels during the opening and closing process, making the opening and closing process of the powder inhaler more suitable for user usage habits.

[0333] 28 to 30B , FIG28 is a schematic diagram of a cycle of the cover opening and closing process of the powder inhaler provided in FIG1 , FIG29A is a schematic diagram of a curve of the cover opening angle and torque of one embodiment of the cover opening process of the powder inhaler provided in FIG1 , FIG29B is a schematic diagram of a curve of the cover closing angle and torque of one embodiment of the cover closing process of the powder inhaler provided in FIG1 , FIG30A is a schematic diagram of a curve of the cover opening angle and torque of another embodiment of the cover opening process of the powder inhaler provided in FIG1 , and FIG30B is a schematic diagram of a curve of the cover closing angle and torque of another embodiment of the cover closing process of the powder inhaler provided in FIG1 .

[0334] (1) Opening process

[0335] 28 and 29A and 29B , in some embodiments, the travel of the outer cover 4 from the first position to the second position (i.e., the cover opening process) includes an idle cover opening travel and a loaded cover opening travel following the idle cover opening travel. For example, the travel of the outer cover 4 from the first position to the second position includes only the idle cover opening travel and the loaded cover opening travel following the idle cover opening travel.

[0336] During the lid opening idle stroke, the outer cover 4 does not trigger the action of the functional mechanism. During the lid opening loaded stroke, the outer cover 4 triggers the functional mechanism to deliver powder to the inhalation channel 706. The maximum torque of the outer cover 4 during the lid opening idle stroke is greater than the maximum torque during the lid opening loaded stroke. This can prevent accidental lid opening due to non-human factors during the lid opening idle stroke, while also ensuring rapid or smooth operation at different stages within the lid opening loaded stroke. Preferably, the torque of the outer cover 4 during the lid 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 lid opening loaded stroke is greater than or equal to 0 N·m and less than or equal to 0.15 N·m.

[0337] 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 a preferred embodiment, the angle of the outer cover 4 in the second position is 150 degrees. The critical angle between the idle opening stroke and the loaded opening 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 idle opening stroke and the loaded opening stroke is specifically 12 degrees, that is, the idle opening stroke of the outer cover 4 is between 0 degrees and 12 degrees, and the loaded opening stroke of the outer cover 4 is between 12 degrees and 150 degrees.

[0338] (1) Opening empty travel

[0339] The lid opening idle stroke includes a first lid opening idle stroke and a second lid opening idle stroke following the first lid opening idle stroke. The critical angle between the first lid opening idle stroke and the second lid opening idle stroke is greater than or equal to 6 degrees and less than or equal to 10 degrees. As shown in FIG25 , in a preferred embodiment, the critical angle between the first lid opening idle stroke and the second lid opening idle stroke is 8 degrees. That is, the first lid opening idle stroke is between 0 degrees and 8 degrees, and the second lid opening idle stroke is between 8 degrees and 12 degrees.

[0340] Wherein, the torque of the outer cover 4 in the first lid opening idle stroke is greater than or equal to 0.02N·m and less than or equal to 0.08N·m, and the torque of the outer cover 4 in the second lid opening idle stroke is greater than or equal to 0.1N·m and less than or equal to 0.2N·m. Preferably, the torque of the outer cover 4 in the first lid opening idle stroke is 0.05N·m, that is, the initial torque set at the outer cover 4 from 0 degrees to 8 degrees is 0.05N·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 0.15N·m, that is, the torque set at the outer cover 4 from 8 degrees to 12 degrees is 0.15N·m. A larger opening resistance is set at the outer cover 4 from 8 degrees to 12 degrees to prevent accidental opening.

[0341] (2) Opening load stroke

[0342] The cover opening loading stroke includes a first cover opening loading stroke and a second cover opening loading stroke after the first cover opening loading stroke. The outer cover 4 triggers the air compression mechanism to press the powder from the storage chamber 715 into the dosage cup 902 during the first cover opening loading stroke. The outer cover 4 triggers the dosage cup 902 to deliver the powder to the inhalation channel 706 during the second cover opening loading stroke.

[0343] The critical angle between the first lid opening load stroke and the second lid opening load stroke is greater than or equal to 60 degrees and less than or equal to 65 degrees. In a preferred embodiment, the critical angle between the first lid opening load stroke and the second lid opening load stroke is 62.5 degrees. That is, the first lid opening load stroke of the outer cover 4 is between 12 degrees and 62.5 degrees, and the second lid opening load stroke of the outer cover 4 is between 62.5 degrees and 150 degrees.

[0344] The torque of the outer cover 4 within the first load stroke for opening the lid is constant 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 within the first load stroke for opening the lid is 0 N·m, that is, the torque of the outer cover 4 set between 12 degrees and 62.5 degrees is 0 N·m. The compression process is performed within the first load stroke for opening the lid. The torque within this angle range is set to 0 N·m, which can achieve instant opening when opening the lid, allowing the compression mechanism to rapidly compress air, thereby improving the compression effect.

[0345] The torque of the outer cover 4 is constant within the second load stroke of opening the lid, and 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 second load stroke of opening the lid is 0.1 N·m, that is, the torque set on the outer cover 4 between 62.5 degrees and 150 degrees is 0.1 N·m. The outer cover 4 performs the powder delivery process within the second load stroke of opening the lid. At this stage, the outer cover 4 should be opened smoothly at a uniform speed, and the torque value set within the second load stroke of opening the lid is a constant torque of 0.1·m, without sudden torque changes until the lid is opened, thereby ensuring the powder delivery effect.

[0346] (2) Closing process

[0347] Referring to Figures 28, 29A and 29B, in some embodiments, the stroke of the outer cover 4 rotating from the second position to the first position (i.e., the cover closing process) includes a cover closing idle stroke and a cover closing load stroke after the cover closing idle stroke, wherein within the cover closing load stroke, the outer cover 4 triggers the functional mechanism to reset.

[0348] 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 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 lid closing idle stroke and the lid closing load stroke is greater than or equal to 80 degrees and less than or equal to 95 degrees. Preferably, the critical angle between the lid closing idle stroke and the lid closing load stroke is 87.5 degrees. That is, the outer cover 4 has an idle stroke from 150 degrees to 87.5 degrees, and a lid closing load stroke from 87.5 degrees to 0 degrees.

[0349] (1) Closing the cover and empty travel

[0350] The maximum torque of the outer cover 4 in the empty closing stroke 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 in the empty closing stroke can prevent the cover from being closed by mistake due to non-human factors.

[0351] In some embodiments, the lid closing idle stroke includes a first lid closing idle stroke and a second lid closing idle stroke following the first lid closing idle stroke, and the critical angle between the first lid closing idle stroke and the second lid closing idle stroke is greater than or equal to 135 degrees and less than or equal to 145 degrees. Preferably, the critical angle between the first lid closing idle stroke and the second lid closing idle stroke is 140 degrees. That is, the first lid closing idle stroke of the outer cover 4 is between 150 degrees and 140 degrees, and the second lid closing idle stroke of the outer cover 4 is between 140 degrees and 87.5 degrees.

[0352] The torque of the outer cover 4 during the first idle stroke of the lid closing is constant and 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 during the first idle stroke of the lid closing is 0.05 N·m, that is, the torque of the outer cover 4 is 0.05 N·m between 150 degrees and 140 degrees, thereby preventing the lid from being closed due to non-human factors.

[0353] The torque of the outer cover 4 in the second closing cover idle stroke is constant and is less than or equal to 0.02 N·m. Preferably, the torque of the outer cover 4 in the second closing cover idle stroke is 0 N·m, which can accelerate the closing process and increase the smoothness of closing the cover.

[0354] (2) Cover closing load stroke

[0355] The maximum torque of the outer cover 4 within the lid closing load stroke is greater than 0.05 N·m and less than or equal to 0.3 N·m. Specifically, the lid closing load stroke includes a first lid closing load stroke, a second lid closing load stroke, and a third lid closing load stroke, which are arranged in chronological order. During the first lid closing load stroke, the outer cover 4 only triggers the powder metering wheel 9 to reset and rotate. During the second lid closing 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 the reset. During the third lid closing load stroke, the outer cover 4 only triggers the powder metering wheel 9 to reset and rotate, and triggers the powder metering wheel 9 to reset and rotate to the first position. During the lid closing load stroke, the outer cover 4 also triggers the dose protection plate 10 and the air intake baffle 11 to complete the reset.

[0356] The critical angle between the first and second lid load strokes is greater than or equal to 60 degrees and less than or equal to 65 degrees. Preferably, the critical angle between the first and second lid load strokes is 62.5 degrees, that is, the first lid load stroke is between 87.5 degrees and 62.5 degrees. The critical angle between the second and third lid load strokes is greater than or equal to 6 degrees and less than or equal to 10 degrees. Preferably, the critical angle between the second and third lid load strokes is 8 degrees, that is, the second lid load stroke is between 62.5 degrees and 8 degrees, and the third lid load stroke is between 8 degrees and 0 degrees.

[0357] The torque of the outer cover 4 within the first level cover 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 level cover load stroke is 0.1 N·m, that is, the torque of the outer cover 4 between 87.5 degrees and 62.5 degrees is 0.1 N·m, and only the powder metering wheel 9 is rotating within the first level cover load stroke.

[0358] The torque of the outer cover 4 gradually increases within the second lid load stroke, with a maximum value 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 gradually increases from 0.10 N·m to 0.20 N·m within the second lid load stroke, that is, the torque of the outer cover 4 gradually increases from 0.10 N·m to 0.20 N·m between 62.5 degrees and 8 degrees. The powder metering wheel 9 continues to rotate within the second lid load stroke, and the airbag pressing member 17 is continuously pushed up and reset.

[0359] The torque of the outer cover 4 within the third lid load stroke is constant and 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 lid load stroke is 0.1 N·m, that is, the torque of the outer cover 4 between 8 degrees and 0 degrees is 0.1 N·m. The airbag pressure member 17 has been completely reset within the third lid load stroke. At this time, the lid closing stroke overcomes the rotational resistance of the powder metering wheel 9 until the lid is closed.

[0360] 30A and 30B , in another embodiment, the opening and closing processes of the outer cover 4 of the powder inhaler can also be set according to the corresponding relationship between the opening and closing cover angles and the torque as shown in FIG30A and 30B . In this embodiment, the torque change during the opening and closing processes has a climbing curve, with fewer torque mutations, which is more user-friendly.

[0361] Referring to Figures 31A to 31E, Figure 31A is a schematic diagram of the powder inhaler provided in Figure 1 as viewed from above at an angle, Figure 31B is a schematic diagram of the powder inhaler provided in Figure 31A placed on a horizontal surface, Figure 31C is a schematic diagram of the powder inhaler provided in Figure 31A in a handheld state, Figure 31D is a schematic diagram of the powder inhaler provided in Figure 31A after the cover is opened in the handheld state, and Figure 31E is a schematic diagram of the powder inhaler provided in Figure 31A in a mouth-inhaled state.

[0362] 1 , 5A, 5B, 31A, and 31B, the outer cover 4 of the powder inhaler includes two connecting portions 406 arranged opposite to each other along a first direction and a free end 407 located on one side of the two connecting portions 406 along a second direction. The first direction intersects the second direction, and the two connecting portions 406 are 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 portions 406 are used to support the housing assembly so that the powder inhaler can be stably placed on a horizontal surface. The three supporting points of the two connecting portions 406 and the free end 407 can achieve stable placement to avoid tipping over due to unstable placement of the powder inhaler.

[0363] The present invention ensures that the powder container 7 is always above the powder metering wheel 9 during use and storage of the device. Excessive changes in the device position state may cause frequent movement of powder in the powder container 7, resulting in powder variation and other problems. For example, the active ingredients of the powder may be separated from the carrier, the powder particles may become smaller, and small particles may accumulate at the bottom. This ensures that the powder in the powder container 7 is always in a relatively stable state throughout the service life of the powder inhaler.

[0364] For example, as shown in FIG31B , when the bottom end of the powder inhaler is placed on a horizontal surface, the inclination angle of the axis of the shell 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 surface, the inclination angle of the axis of the shell assembly relative to the vertical direction is 6 degrees, which can further ensure that the position state of the device changes little and ensure that when the powder inhaler is placed on a horizontal surface (i.e., in a storage state), the powder in the powder container 7 is always in a relatively stable state.

[0365] For example, as shown in Figures 31C and 31D, when the powder inhaler is opened and closed by hand, the device is in a vertical state, and the axis of the shell assembly of the powder inhaler is parallel to the vertical direction, which is more convenient for opening and closing the cover and also makes the position state of the device change less, ensuring that the powder in the powder container 7 is in a relatively stable state during the opening and closing process.

[0366] For example, as shown in FIG31E , during the user's mouth inhalation, the axis of the shell assembly of the powder inhaler is tilted at an angle greater than or equal to 0 degrees and less than or equal to 15 degrees relative to the vertical direction. Preferably, during the user's mouth inhalation, the axis of the shell assembly of the powder inhaler is tilted at an angle of 15 degrees relative to the vertical direction, which ensures that the position state of the powder inhaler changes little during the mouth inhalation process, the powder in the powder container 7 is in a relatively stable state, and also ensures the convenience of the user inhaling from the outlet 102 of the mouthpiece 101.

[0367] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

<pat:ClaimStatement>CLAIMS What is claimed is:< / pat:ClaimStatement> <pat:Claims com:id="claims"> <pat:Claim com:id="CLM-00001"> <pat:ClaimNumber>1< / pat:ClaimNumber> <pat:ClaimText>1. A powder inhaler, comprising: a functional mechanism, comprising an inhalation channel; a suction nozzle, in communication with the inhalation channel; and an outer cap, being linked to and cooperating with the functional mechanism, and being limited to rotate back and forth between a first position and a second position, wherein the outer cap blocks the suction nozzle when the outer cap is configured to be at the first position; and the outer cap unblocks the suction nozzle when the outer cap is configured to be at the second position, wherein a stroke of the outer cap rotating from the first position to the second position comprises a cap-opening idle stroke and a cap-opening load stroke following the cap-opening idle stroke; the outer cap does not trigger an action of the functional mechanism in the cap-opening idle stroke; and the outer cap triggers, in the cap-opening load stroke, the functional mechanism to deliver powder to the inhalation channel; and / or a stroke of the outer cap rotating and resetting from the second position to the first position comprises a cap-closing idle stroke and a cap-closing load stroke following the cap-closing idle stroke; the outer cap does not trigger an action of the functional mechanism in the cap-closing idle stroke; and the outer cap triggers, in the cap-closing load stroke, the functional mechanism to reset. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00002"> <pat:ClaimNumber>2< / pat:ClaimNumber> <pat:ClaimText>2. The powder inhaler of claim 1, wherein the cap-opening idle stroke comprises a first cap-opening sub-idle stroke and a second cap-opening sub-idle stroke following the first cap-opening sub-idle stroke, wherein a torque in the second cap-opening sub-idle stroke is greater than a torque in the first cap-opening sub- idle stroke; and preferably, a torque gradually increases or abruptly increases in a process of switching from the first cap-opening sub-idle stroke to the second cap-opening sub-idle stroke. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00003"> <pat:ClaimNumber>3< / pat:ClaimNumber> <pat:ClaimText>3. The powder inhaler of claim 1, wherein the cap-opening load stroke comprises a first cap-opening sub-load stroke and a second cap-opening sub-load stroke following the first cap-opening sub-load stroke, wherein a torque in the first cap-opening sub-load stroke is less than a torque in the second cap- opening sub-load stroke and / or the cap-opening idle stroke. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00004"> <pat:ClaimNumber>4< / pat:ClaimNumber> <pat:ClaimText>4. The powder inhaler of claim 1, wherein the cap-closing idle stroke comprises a first cap-closing sub-idle stroke and a second cap- closing sub-idle stroke following the first cap-closing sub-idle stroke, wherein a torque in the first cap-closing sub-idle stroke is greater than a torque in the second cap- closing sub-idle stroke; and preferably, the torque in the first cap-closing sub-idle stroke is constant or gradually increases. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00005"> <pat:ClaimNumber>5< / pat:ClaimNumber> <pat:ClaimText>5. The powder inhaler of claim 1, wherein the cap-closing load stroke comprises a first cap-closing sub-load stroke, a second cap- closing sub-load stroke, and a third cap-closing sub-load stroke that are set in chronological order, wherein a torque in the second cap-closing sub-load stroke is greater than a torque in the first cap- closing sub-load stroke and / or the third cap-closing sub-load stroke; preferably, the torque in the third cap-closing sub-load stroke is greater than or equal to the torque in the first cap-closing sub-load stroke; and preferably, the torque in the second cap-closing sub-load stroke and / or the first cap-closing sub-load stroke gradually increases. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00006"> <pat:ClaimNumber>6< / pat:ClaimNumber> <pat:ClaimText>6. The powder inhaler of claim 1, wherein the functional mechanism comprises: an air compressing mechanism; and a powder delivery mechanism, comprising a storage cavity and a dose cup, wherein the storage cavity is configured to store the powder, and the storage cavity has a powder outlet; the cap-opening load stroke comprises a first cap-opening sub-load stroke and a second cap- opening sub-load stroke following the first cap-opening sub-load stroke; the outer cap triggers, in the first cap-opening sub-load stroke, the air compressing mechanism to press the powder from the storage cavity into the dose cup; and the outer cap drives, in the second cap-opening sub-load stroke, the dose cup to deliver the powder to the inhalation channel. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00007"> <pat:ClaimNumber>7< / pat:ClaimNumber> <pat:ClaimText>7. The powder inhaler of claim 6, wherein the delivery mechanism comprises a powder container and a powder metering wheel; the powder container has the inhalation channel and the storage cavity; the powder metering wheel is rotatably connected to the powder container; the powder metering wheel comprises the dose cup; and the outer cap triggers, in the first cap-opening sub-load stroke, the air compressing mechanism to first press air into the powder container, and then relieve pressure in the powder container, wherein the powder metering wheel is capable of rotating back and forth between a third position and a fourth position; when the powder metering wheel is configured to be at the third position, the dose cup is disposed corresponding to the powder outlet of the storage cavity and is configured to receive the powder in the powder container; when the powder metering wheel is configured to be at the fourth position, the dose cup is disposed corresponding to an inlet of the inhalation channel; and the outer cap drives, in the second cap-opening sub-load stroke, the dose cup to rotate from the third position to the fourth position. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00008"> <pat:ClaimNumber>8< / pat:ClaimNumber> <pat:ClaimText>8. The powder inhaler of claim 7, further comprising: an inhalation trigger mechanism, comprising a dose protection plate and an air inlet baffle that are linked to and cooperate with each other, a resetting torsion spring, and a drive torsion spring, wherein the resetting torsion spring limits the air inlet baffle to an airflow channel; and the dose protection plate is limited by the air inlet baffle to the inlet of the inhalation channel and blocks the dose cup, wherein the outer cap presses the resetting torsion spring in the second cap-opening sub-load stroke, and releases limitation of the resetting torsion spring on the air inlet baffle; and when negative pressure of the airflow channel exceeds a threshold, the air inlet baffle rotates under an action of an air flow to release limitation on the dose protection plate, and the dose protection plate rotates to deviate under an action of the drive torsion spring and unblocks the dose cup of the powder metering wheel. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00009"> <pat:ClaimNumber>9< / pat:ClaimNumber> <pat:ClaimText>9. The powder inhaler of claim 1, wherein the functional mechanism comprises: an air compressing mechanism; and a powder delivery mechanism, comprising a powder container and a powder metering wheel, wherein the powder container has a storage cavity, and is configured to store the powder; and the powder metering wheel is rotatably connected to the powder container, wherein the cap-closing load stroke comprises a first cap-closing sub-load stroke, a second cap- closing sub-load stroke, and a third cap-closing sub-load stroke that are set in chronological order; the outer cap triggers, in the first cap-closing sub-load stroke, the powder metering wheel to reset and rotate; the outer cap continues to trigger, in the second cap-closing sub-load stroke, the powder metering wheel to reset and rotate and triggers the air compressing mechanism to complete resetting; and the outer cap triggers, in the third cap-closing sub-load stroke, only the powder metering wheel to reset and rotate, and triggers the powder metering wheel to reset and rotate to the first position. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00010"> <pat:ClaimNumber>10< / pat:ClaimNumber> <pat:ClaimText>10. The powder inhaler of claim 9, further comprising: an inhalation trigger mechanism, comprising a dose protection plate and an air inlet baffle that are linked to and cooperate with each other, a resetting torsion spring, and a drive torsion spring, wherein the resetting torsion spring limits the air inlet baffle to an airflow channel; and the dose protection plate is limited by the air inlet baffle to an inlet of the inhalation channel and blocks a dose cup of the powder metering wheel, wherein the outer cap presses the resetting torsion spring in the cap-opening load stroke, and releases limitation of the resetting torsion spring on the air inlet baffle; when negative pressure of the airflow channel exceeds a threshold, the air inlet baffle rotates under an action of an air flow to open the airflow channel and release limitation on the dose protection plate, and the dose protection plate rotates to deviate under an action of the drive torsion spring and unblocks the dose cup of the powder metering wheel; and further, the outer cap further triggers, in the cap-closing load stroke, the dose protection plate and the air inlet baffle to reset. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00011"> <pat:ClaimNumber>11< / pat:ClaimNumber> <pat:ClaimText>11. The powder inhaler of claim 10, wherein the outer cap drives, in the first cap-closing sub-load stroke and the second cap-closing sub-load stroke via the powder metering wheel, the dose protection plate to reset to a position beyond the inlet of the inhalation channel, and compresses the drive torsion spring; the resetting torsion spring drives the air inlet baffle to reset and rotate and close the airflow channel; and the outer cap is in the third cap-closing sub-load stroke, the powder metering wheel disengages from the dose protection plate, and the drive torsion spring drives the dose protection plate to rotate to the inlet of the inhalation channel, and is limited by the air inlet baffle at the inlet of the inhalation channel. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00012"> <pat:ClaimNumber>12< / pat:ClaimNumber> <pat:ClaimText>12. The powder inhaler according to any one of claims 1 to 11, wherein an angle of the outer cap at the first position is defined as 0 degrees, and an angle of the outer cap at the second position is greater than or equal to 120 degrees and less than or equal to 180 degrees; preferably, the angle of the outer cap at the second position is 150 degrees; and a critical angle between the cap-opening idle stroke and the cap-opening load stroke is greater than or equal to 10 degrees and less than or equal to 15 degrees; and / or a torque of the outer cap in the cap-opening idle stroke is greater than or equal to 0.05 N•m and less than or equal to 0.3 N•m, and a torque of the outer cap in the cap-opening load stroke is greater than or equal to 0 N•m and less than or equal to 0.15 N•m; and / or the cap-opening idle stroke comprises the first cap-opening sub-idle stroke and the second cap-opening sub-idle stroke following the first cap-opening sub-idle stroke, wherein a critical angle between the first cap-opening sub-idle stroke and the second cap-opening sub-idle stroke is greater than or equal to 6 degrees and less than or equal to 10 degrees; and / or a torque of the outer cap in the first cap-opening sub-idle stroke is greater than or equal to 0.02 N•m and less than or equal to 0.08 N•m, and a torque of the outer cap in the second cap-opening sub-idle stroke is greater than or equal to 0.1 N•m and less than or equal to 0.2 N•m; and / or the cap-opening load stroke comprises the first cap-opening sub-load stroke and the second cap-opening sub-load stroke following the first cap-opening sub-load stroke, wherein a critical angle between the first cap-opening sub-load stroke and the second cap-opening sub- load stroke is greater than or equal to 60 degrees and less than or equal to 65 degrees; and / or a torque of the outer cap in the first cap-opening sub-load stroke is constant, and is greater than or equal to 0 N•m and less than or equal to 0.05 N•m, and a torque of the outer cap in the second cap-opening sub-load stroke is constant, and is greater than or equal to 0.05 N•m and less than or equal to 0.15 N•m; and / or a critical angle between the cap-closing idle stroke and the cap-closing load stroke is greater than or equal to 80 degrees and less than or equal to 95 degrees; and / or a maximum torque of the outer cap in the cap-closing idle stroke is greater than or equal to 0.03 N•m and less than or equal to 0.07 N•m, and a maximum torque of the outer cap in the cap-closing load stroke is greater than 0.05 N•m and less than or equal to 0.3 N•m; and / or the cap-closing idle stroke comprises the first cap-closing sub-idle stroke and the second cap-closing sub-idle stroke following the first cap-closing sub-idle stroke, wherein a critical angle between the first cap-closing sub-idle stroke and the second cap-closing sub-idle stroke is greater than or equal to 135 degrees and less than or equal to 145 degrees; and / or a torque of the outer cap in the first cap-closing sub-idle stroke is constant, and is greater than or equal to < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00013"> <pat:ClaimNumber>13< / pat:ClaimNumber> <pat:ClaimText>13. An air inlet baffle, configured for a powder inhaler, wherein the air inlet baffle comprises: a baffle body, wherein a first surface of the baffle body has a boss, and a peripheral side surface of the boss is spaced apart from a peripheral side surface of the baffle body. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00014"> <pat:ClaimNumber>14< / pat:ClaimNumber> <pat:ClaimText>14. The air inlet baffle of claim 13, wherein the boss covers a central region of the first surface of the baffle body. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00015"> <pat:ClaimNumber>15< / pat:ClaimNumber> <pat:ClaimText>15. The air inlet baffle of claim 14, wherein the outer peripheral side surface of the boss is evenly spaced apart from the outer peripheral side surface of the baffle body along a circumferential direction of the boss; and a part of the first surface of the baffle body that is not covered by the boss forms an annular surface. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00016"> <pat:ClaimNumber>16< / pat:ClaimNumber> <pat:ClaimText>16. The air inlet baffle of claim 13, wherein the air inlet baffle further comprises a rotating shaft, disposed at a first end of the baffle body; and a height of the boss gradually decreases along a direction from the first end of the baffle body to an opposite second end of the baffle body, to enable a top surface of the boss to form an inclined surface. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00017"> <pat:ClaimNumber>17< / pat:ClaimNumber> <pat:ClaimText>17. The air inlet baffle of claim 13, wherein the baffle body is recessed to form the boss. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00018"> <pat:ClaimNumber>18< / pat:ClaimNumber> <pat:ClaimText>18. The air inlet baffle of claim 13, wherein the air inlet baffle further comprises a rotating shaft and a rotating member; the rotating shaft is disposed at one end of the baffle body; and the rotating member is connected to a free end of the rotating shaft and is spaced apart from the baffle body, wherein a first end of the rotating member has a curved surface. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00019"> <pat:ClaimNumber>19< / pat:ClaimNumber> <pat:ClaimText>19. The air inlet baffle of claim 18, wherein a surface of a second end of the rotating member that is away from the baffle body has a protruding cylinder. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00020"> <pat:ClaimNumber>20< / pat:ClaimNumber> <pat:ClaimText>20. The air inlet baffle of claim 19, wherein a quantity of rotating shafts is two, and the rotating shafts are respectively disposed on two opposite sides of the baffle body and are defined as a first rotating shaft and a second rotating shaft; a quantity of rotating members is two, and the rotating members are defined as a first rotating member and a second rotating member; the first rotating member is connected to a free end of the first rotating shaft, a first end of the first rotating member has a first curved surface, and a surface of a second end of the first rotating member that is away from the baffle body has the protruding cylinder; and the second rotating member is connected to a free end of the second rotating shaft, a first end of the second rotating member has a second curved surface, and a second end of the second rotating member has a circular-arc-shaped groove surface. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00021"> <pat:ClaimNumber>21< / pat:ClaimNumber> <pat:ClaimText>21. The air inlet baffle of claim 18, wherein a quantity of rotating shafts is two, and the rotating shafts are respectively disposed on two opposite sides of the baffle body; one end of each rotating shaft is connected to a side surface of the baffle body; and the side surface of the baffle body further has a shoulder surrounding the rotating shaft, and the shoulder is spaced apart from the rotating member. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00022"> <pat:ClaimNumber>22< / pat:ClaimNumber> <pat:ClaimText>22. A dose protection plate, configured for a powder inhaler, wherein the dose protection plate comprises: an annular body; and a blocking portion, connected to one end of the annular body and configured to block or unblock a dose cup of the powder inhaler. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00023"> <pat:ClaimNumber>23< / pat:ClaimNumber> <pat:ClaimText>23. The dose protection plate of claim 22, wherein the dose protection plate further comprises a pressing member, and the pressing member is disposed on an outer side surface of the annular body; and a surface of the pressing member that is away from the annular body comprises a pressing arc surface. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00024"> <pat:ClaimNumber>24< / pat:ClaimNumber> <pat:ClaimText>24. The dose protection plate of claim 23, wherein the pressing member comprises a cylindrical convex surface, and the cylindrical convex surface is disposed on one side of the pressing arc surface. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00025"> <pat:ClaimNumber>25< / pat:ClaimNumber> <pat:ClaimText>25. The dose protection plate of claim 22, wherein the dose protection plate further comprises an elastic arm claw, and one end of the elastic arm claw is connected to the annular body. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00026"> <pat:ClaimNumber>26< / pat:ClaimNumber> <pat:ClaimText>26. The dose protection plate of claim 22, wherein the dose protection plate further comprises a wedge-shaped post, and one end of the wedge-shaped post is connected to the annular body. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00027"> <pat:ClaimNumber>27< / pat:ClaimNumber> <pat:ClaimText>27. An inhalation trigger mechanism, comprising: the air inlet baffle according to any one of claims 13 to 21; and / or the dose protection plate according to any one of claims 22 to 26. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00028"> <pat:ClaimNumber>28< / pat:ClaimNumber> <pat:ClaimText>28. A powder inhaler, comprising: a powder delivery mechanism, comprising a powder container and a powder metering wheel, wherein the powder container has a storage cavity, an inhalation channel, and an airflow channel; the inhalation channel is in communication with the airflow channel; the storage cavity is configured to store powder, and the storage cavity has a powder outlet; the powder metering wheel is rotatably connected to the powder container; the powder metering wheel comprises a dose cup; the dose cup is configured to receive the powder from the powder outlet and deliver the powder to an inlet of the inhalation channel; and the inhalation trigger mechanism of claim 27, wherein the air inlet baffle is rotatably connected to a side wall of the airflow channel, and the first surface of the baffle body faces an outer side of a port of the airflow channel; the dose protection plate is rotatably connected to the powder container; and the air inlet baffle is linked to and cooperates with the dose protection plate, wherein when the inhalation trigger mechanism is in an initial state, the air inlet baffle seals the airflow channel, and the inhalation channel is not in communication with external air; the blocking portion blocks the powder outlet of the dose cup that is located at the inlet of the inhalation channel; and when negative pressure in the inhalation channel exceeds a threshold, the air inlet baffle rotates to enable the airflow channel to be opened and triggers the dose protection plate to rotate, to enable the blocking portion to deviate and unblock the powder outlet of the dose cup, and the airflow channel is in communication with the external air and the inhalation channel. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00029"> <pat:ClaimNumber>29< / pat:ClaimNumber> <pat:ClaimText>29. The powder inhaler of claim 28, further comprising: a housing assembly, comprising a front housing, wherein the front housing has a suction nozzle, and the suction nozzle is disposed corresponding to the inhalation channel and is in communication with the inhalation channel; a side wall of the front housing is provided with an air inlet and a grille, and the grille protrudes out of an outer wall surface of the front housing; an inner wall surface of the front housing is provided with an annular flange surrounding the air inlet, one end of the annular flange is disposed in the airflow channel, and the side wall of the front housing seals the port of the airflow channel; the air inlet baffle has the annular surface; when the inhalation trigger mechanism is in an initial state, the boss is embedded in the annular flange, an inner peripheral surface of the annular flange is spaced apart from and cooperates with an outer peripheral surface of the boss to form a first flow channel segment, an end surface at one end of the annular flange that is away from the front housing abuts against and cooperates with the annular surface to form a second flow channel segment, and the first flow channel segment and the second flow channel segment form an L-shaped air inlet flow channel; the pressing arc surface cooperates with a circular-arc-shaped groove surface of the air inlet baffle to implement concentric arc surface pressing; and when the negative pressure in the inhalation channel exceeds the threshold, the air inlet baffle rotates to enable the airflow channel to be opened, and the airflow channel is in communication with the external air through the air inlet. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00030"> <pat:ClaimNumber>30< / pat:ClaimNumber> <pat:ClaimText>30. The powder inhaler of claim 29, wherein a ratio of a distance between the top surface of the boss and the first surface of the baffle body to a thickness of the annular flange is 1:2 to 7:

1. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00031"> <pat:ClaimNumber>31< / pat:ClaimNumber> <pat:ClaimText>31. The powder inhaler of claim 29, wherein the side wall of the front housing is provided with at least two air inlets and at least one grille, and the grille and the air inlets are alternately provided; the annular flange is disposed around the air inlets and the grille; the side wall of the airflow channel is connected to a side wall of the storage cavity, and one end of the side wall of the airflow channel that is connected to the side wall of the storage cavity is provided with a first flow guiding hole and a second flow guiding hole that are spaced apart from each other; one end of the inhalation channel that is close to the suction nozzle has a first airflow inlet and a second airflow inlet that are spaced apart from each other, the first flow guiding hole is in communication with the airflow channel and the first airflow inlet, and the second flow guiding hole is in communication with the airflow channel and the second airflow inlet; and the inner wall surface of the front housing is spaced apart from an outer wall surface of the inhalation channel to form a flow guiding channel, and the flow guiding channel is in communication with the airflow channel, the first airflow inlet, and the second airflow inlet. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00032"> <pat:ClaimNumber>32< / pat:ClaimNumber> <pat:ClaimText>32. The powder inhaler of claim 29, further comprising: an outer cap, rotatably connected to the housing assembly and capable of rotating back and forth between a first position and a second position, wherein the outer cap blocks the suction nozzle and the air inlet when the outer cap is configured to be at the first position; and the suction nozzle and the air inlet are exposed when the outer cap is configured to be at the second position; and an air compressing mechanism, disposed on the powder container, and configured to press the powder in the powder container into the dose cup, wherein the powder metering wheel is capable of rotating back and forth between a third position and a fourth position; when the powder metering wheel is configured to be at the third position, the dose cup is disposed corresponding to the powder outlet of the storage cavity; when the powder metering wheel is configured to be at the fourth position, the dose cup is disposed corresponding to an inlet of the inhalation channel; the outer cap is linked to and cooperates with the powder delivery mechanism and the air compressing mechanism respectively; in a process in which the outer cap rotates from the first position to the second position, the outer cap first drives the air compressing mechanism to press the powder in the storage cavity into the dose cup, and then drives the powder metering wheel to rotate from the third position to the fourth position; and in a process in which the outer cap reversely rotates and resets from the second position to the first position, the outer cap drives the powder metering wheel, the dose protection plate, and the air compressing mechanism respectively to reset, and triggers the air inlet baffle to reversely rotate and reset. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00033"> <pat:ClaimNumber>33< / pat:ClaimNumber> <pat:ClaimText>33. An airbag pressing member, configured for a powder inhaler, wherein a side wall of the airbag pressing member has a pressure relief hole; and the airbag pressing member is configured to press an air compressing airbag. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00034"> <pat:ClaimNumber>34< / pat:ClaimNumber> <pat:ClaimText>34. The airbag pressing member of claim 33, wherein one end of the side wall of the airbag pressing member that is away from a top wall of the airbag pressing member has a protruding rod, and one end of the protruding rod that is away from the top wall has an arc surface. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00035"> <pat:ClaimNumber>35< / pat:ClaimNumber> <pat:ClaimText>35. The airbag pressing member of claim 34, wherein one end of the protruding rod that is away from the top wall has a tip, and an end surface of the tip is the arc surface. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00036"> <pat:ClaimNumber>36< / pat:ClaimNumber> <pat:ClaimText>36. The airbag pressing member of claim 34, wherein the arc surface is a circular arc surface. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00037"> <pat:ClaimNumber>37< / pat:ClaimNumber> <pat:ClaimText>37. The airbag pressing member according to any one of claims 33 to 36, wherein the top wall of the airbag pressing member has a fixing hole, and the fixing hole is configured to connect to a top portion of the air compressing airbag, so as to drive the air compressing airbag to extend and contract. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00038"> <pat:ClaimNumber>38< / pat:ClaimNumber> <pat:ClaimText>38. A drive cam, configured for a powder inhaler, wherein the drive cam comprises: a body portion; and a gear, coaxially connected to the body portion, and configured to drive the body portion to rotate, wherein a surface of the body portion has a guide groove, and a side surface of the guide groove is a cam curved surface. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00039"> <pat:ClaimNumber>39< / pat:ClaimNumber> <pat:ClaimText>39. The drive cam of claim 38, wherein an outer peripheral side surface of the body portion has an arc-shaped groove located at one end of the cam curved surface. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00040"> <pat:ClaimNumber>40< / pat:ClaimNumber> <pat:ClaimText>40. The drive cam of claim 39, wherein the gear is disposed on a surface of the body portion, and the guide groove is provided on a surface of the body portion that faces the gear and is spaced apart from the gear; the cam curved surface comprises a first curved surface segment and a second curved surface segment that are connected to each other, and the second curved surface segment is located at one end of the first curved surface segment that is away from the arc-shaped groove; and the first curved surface segment is a non-circular arc surface, and the second curved surface segment is a circular arc surface and is disposed concentric to the peripheral side surface of the body portion. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00041"> <pat:ClaimNumber>41< / pat:ClaimNumber> <pat:ClaimText>41. The drive cam of claim 40, wherein a stop groove is provided at one end of the second curved surface segment that is away from the first curved surface segment. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00042"> <pat:ClaimNumber>42< / pat:ClaimNumber> <pat:ClaimText>42. The drive cam of claim 41, wherein the arc-shaped groove and / or the stop groove are / is a circular-arc-shaped groove. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00043"> <pat:ClaimNumber>43< / pat:ClaimNumber> <pat:ClaimText>43. The drive cam of claim 40, wherein a surface of the body portion that faces away from the gear has a rib; and one end of the rib is disposed corresponding to an end portion of the second curved surface segment that is close to the first curved surface segment. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00044"> <pat:ClaimNumber>44< / pat:ClaimNumber> <pat:ClaimText>44. The drive cam of claim 41, wherein a surface of the body portion that faces away from the gear further has an annular boss; and the annular boss is disposed coaxially with the gear. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00045"> <pat:ClaimNumber>45< / pat:ClaimNumber> <pat:ClaimText>45. An air compressing mechanism, comprising: an air compressing airbag; an elastic member; the airbag pressing member according to any one of claims 33 to 37; and / or the drive cam according to any one of claims 38 to 44. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00046"> <pat:ClaimNumber>46< / pat:ClaimNumber> <pat:ClaimText>46. The air compressing mechanism of claim 45, wherein the arc surface of the protruding rod cooperates with the cam curved surface of the drive cam to enable the airbag pressing member to move back and forth between a fifth position and a sixth position; and when the airbag pressing member is configured to be at an initial position, the tip of the protruding rod is embedded in the arc-shaped groove of the cam curved surface, to initially position the airbag pressing member. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00047"> <pat:ClaimNumber>47< / pat:ClaimNumber> <pat:ClaimText>47. A powder inhaler, comprising: a powder delivery mechanism, comprising a powder container, wherein the powder container has a storage cavity, a first end of the storage cavity has a powder outlet, and a second end of the storage cavity has an air compressing port; and a side wall of the storage cavity has a vent hole; and the air compressing mechanism of claim 45 or 46, wherein the air compressing airbag is disposed at the second end of the storage cavity and is in communication with the air compressing port; the airbag pressing member is movably sleeved on an outer side of the air compressing airbag and an outer side of the storage cavity; the drive cam and the elastic member are configured to drive the airbag pressing member to move back and forth between the fifth position and the sixth position, so as to drive the air compressing airbag to extend and contract; when the airbag pressing member is configured to be at the fifth position, the side wall of the airbag pressing member seals the vent hole, and the pressure relief hole is not in communication with the vent hole; and when the airbag pressing member is configured to be at the sixth position, the pressure relief hole is in communication with the vent hole, to relieve pressure in the storage cavity. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00048"> <pat:ClaimNumber>48< / pat:ClaimNumber> <pat:ClaimText>48. The powder inhaler of claim 47, further comprising: a filter membrane, disposed at the second end of the storage cavity, wherein the filter membrane is located at the air compressing port and is spaced apart from a port of the air compressing port; and one end of the vent hole is in communication with space between the filter membrane and the air compressing airbag; a housing assembly, having a suction nozzle; and an outer cap, rotatably connected to the housing assembly and capable of rotating back and forth between a first position and a second position, wherein the outer cap blocks the suction nozzle when the outer cap is configured to be at the first position; the suction nozzle is exposed when the outer cap is configured to be at the second position; the powder delivery mechanism further comprises a powder metering wheel; the powder container further has an inhalation channel, and the suction nozzle is in communication with the inhalation channel; the powder metering wheel is rotatably connected to the powder container; the powder metering wheel comprises a dose cup; the powder metering wheel is capable of rotating back and forth between a third position and a fourth position; when the powder metering wheel is configured to be at the third position, the dose cup is disposed corresponding to the powder outlet of the storage cavity and is configured to receive the powder in the powder container; and when the powder metering wheel is configured to be at the fourth position, the dose cup is disposed corresponding to an inlet of the inhalation channel, wherein the outer cap is linked to and cooperates with the powder metering wheel and the air compressing mechanism respectively; when the outer cap is configured to be at the first position, the airbag pressing member is limited at the fifth position; in a process in which the outer cap rotates from the first position to the second position, limitation on the airbag pressing member is first released, to enable the elastic member to drive the airbag pressing member to move from the fifth position to the sixth position, and then drive the powder metering wheel to rotate from the third position to the fourth position; and in a process in which the outer cap reversely rotates and resets from the second position to the first position, the outer cap drives the powder metering wheel to reversely rotate and reset, and drives the airbag pressing member to move in a reverse direction and reset to the fifth position. < / pat:ClaimText> < / pat:Claim> < / pat:Claims>