Powder inhaler

Abstract

The invention discloses a powder inhaler. The powder inhaler comprises a functional mechanism, a suction nozzle and an outer cover. The functional mechanism comprises a suction channel; the suction nozzle is communicated with the suction channel; the outer cover is in linkage fit with the functional mechanism and is limited to rotate back and forth between a first position and a second position; the outer cover is configured to shield the suction nozzle at the first position and not shield the suction nozzle at the second position. The stroke of the outer cover rotating from the first position to the second position comprises a cover opening idle stroke and a cover opening load stroke, the inner cover and the outer cover do not trigger the action of the functional mechanism in the cover opening idle stroke, and the inner cover and the outer cover trigger the functional mechanism to deliver powder to the suction channel in the cover opening load stroke; and / or, the stroke of resetting the outer cover from the second position to the first position comprises a cover closing idle stroke and a cover closing load stroke, the inner cover and the outer cover do not trigger the function mechanism to act in the cover closing idle stroke, and the inner cover and the outer cover trigger the function mechanism to reset in the cover closing load stroke. By means of the arrangement, good linkage among the mechanisms is achieved in the cover opening and closing process.

Description

Technical Field

[0001] The present application relates to the technical field of inhalation devices, and particularly to a powder inhaler. Background Art

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

[0003] However, for existing powder inhalers, due to structural limitations, it is impossible to achieve good linkage of each system of the device during the process of opening and closing the cover, and there are problems such as complex powder delivery methods, uncontrollable delivery volume, and easy powder waste. It is impossible to ensure the protection of powders such as medicinal powders under the condition of low-speed air flow inhalation. During the user's suction process, the air flow has a poor effect on the depolymerization of the medicinal powder, resulting in low utilization rate of the medicinal powder and easy powder waste. Summary of the Invention

[0004] The present application mainly provides a powder inhaler to solve the problem that each mechanism of the device cannot achieve good linkage during the process of opening and closing the cover of the powder inhaler in the prior art.

[0005] To solve the above technical problems, a technical solution adopted by the present application is: to provide a powder inhaler, including:

[0006] A functional mechanism including an inhalation channel;

[0007] A mouthpiece communicating with the inhalation channel;

[0008] An outer cover, which is in linkage cooperation 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 to be in the first position, the outer cover shields the mouthpiece; when the outer cover is configured to be in the second position, the outer cover does not shield the mouthpiece;

[0009] Wherein, the stroke of the outer cover rotating from the first position to the second position includes an opening cover idle stroke and an opening cover load stroke after the opening cover idle stroke; within the opening cover idle stroke, the outer cover does not trigger the action of the functional mechanism; within the opening cover load stroke, the outer cover triggers the functional mechanism to deliver powder to the inhalation channel; and / or

[0010] The stroke of the outer cover rotating from the second position back to the first position includes a closing cover idle stroke and a closing cover load stroke after the closing cover idle stroke; within the closing cover idle stroke, the outer cover does not trigger the action of the functional mechanism; within the closing cover load stroke, the outer cover triggers the functional mechanism to reset.

[0011] Among them, the lid-opening idle stroke includes a first lid-opening idle stroke and a second lid-opening idle stroke after the first lid-opening idle stroke; among them, the torque within the second lid-opening idle stroke is greater than the torque within the first lid-opening idle stroke;

[0012] Preferably, during the process of switching from the first lid-opening idle stroke to the second lid-opening idle stroke, the torque gradually increases or suddenly increases.

[0013] Among them, the lid-opening load stroke includes a first lid-opening load stroke and a second lid-opening load stroke after the first lid-opening load stroke;

[0014] Among them, the torque of the first lid-opening load stroke is less than the torque of the second lid-opening load stroke and / or the lid-opening idle stroke.

[0015] Among them, the lid-closing idle stroke includes a first lid-closing idle stroke and a second lid-closing idle stroke after the first lid-closing idle stroke;

[0016] Among them, the torque of the first lid-closing idle stroke is greater than that of the second lid-closing idle stroke;

[0017] Preferably, the torque within the first lid-closing idle stroke is constant or gradually increases.

[0018] Among them, 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;

[0019] Among them, the torque of the second lid-closing load stroke is greater than the torque of the first lid-closing load stroke and / or the third lid-closing load stroke;

[0020] Preferably, the torque of the third lid-closing load stroke is greater than or equal to the torque of the first lid-closing load stroke;

[0021] Preferably, the torque of the second lid-closing load stroke and / or the first lid-closing load stroke gradually increases.

[0022] Among them, the functional mechanism includes: a gas compression mechanism;

[0023] A powder delivery mechanism, including a storage cavity and a dose cup; the storage cavity is used for storing powder, and the storage cavity has a powder outlet; the lid-opening load stroke includes a first lid-opening load stroke and a second lid-opening load stroke after the first lid-opening load stroke; the outer lid triggers the gas compression mechanism within the first lid-opening load stroke to press the powder from the storage cavity into the dose cup; the outer lid drives the dose cup to deliver the powder to the inhalation channel within the second lid-opening load stroke.

[0024] Wherein, the delivery mechanism includes a powder container and a powder metering wheel; the powder container has an inhalation channel and the storage cavity; the powder metering wheel is rotatably connected to the powder container; the powder metering wheel includes the dose cup;

[0025] The outer cover triggers the air compression mechanism to first compress air into the powder container and then relieve the pressure of the powder container within the first lid-opening load stroke;

[0026] Wherein, the powder metering wheel is capable of reciprocating rotation between a third position and a fourth position; when the powder metering wheel is configured at the third position, the dose cup is correspondingly arranged with the powder outlet of the storage cavity for receiving the powder from the powder container; when the powder metering wheel is configured at the fourth position, the dose cup is correspondingly arranged at the entrance of the inhalation channel; the outer cover drives the dose cup to rotate from the third position to the fourth position within the second lid-opening load stroke.

[0027] Wherein, the powder inhaler further includes: an inhalation trigger mechanism, including a dose protection plate, an air intake baffle, a return torsion spring and a driving torsion spring that are linked and cooperated; the return torsion spring limits the air intake baffle on the air flow channel; the dose protection plate is limited by the air intake baffle at the entrance of the inhalation channel and shields the dose cup;

[0028] Wherein, the outer cover squeezes the return torsion spring within the second lid-opening load stroke to release the limitation of the return torsion spring on the air intake baffle;

[0029] When the negative pressure of the air flow channel is greater than the threshold value, the air intake baffle rotates under the action of the air flow to release the limitation on the dose protection plate, and the dose protection plate rotates and deviates under the action of the driving torsion spring and does not shield the dose cup of the powder metering wheel.

[0030] Wherein, the functional mechanism includes: an air compression mechanism;

[0031] A powder delivery mechanism, including 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;

[0032] Among them, 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 which are arranged in chronological order; the outer cover only triggers the powder metering wheel to reset and rotate within the first closing cover load stroke; the outer cover continues to trigger the powder metering wheel to reset and rotate within the second closing cover 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 closing cover load stroke, and triggers the powder metering wheel to reset and rotate to the first position.

[0033] The powder inhaler further comprises: an inhalation trigger mechanism, comprising a dosage protection plate, an air intake baffle, a reset torsion spring and a drive torsion spring that cooperate with each other; the reset torsion spring limits the air intake baffle to the air flow channel; the dosage protection plate is limited by the air intake baffle to the entrance of the inhalation channel and blocks the dosage cup;

[0034] Wherein, the outer cover squeezes the return torsion spring within the cover opening load stroke, thereby releasing the limit of the return torsion spring on the air intake baffle;

[0035] When the negative pressure of the airflow channel is greater than a threshold value, the air inlet baffle rotates under the action of the airflow to open the airflow channel and releases the limit on the dose protection plate. The dose protection plate rotates and deviates under the action of the driving torsion spring so as not to cover the dose cup of the powder metering wheel.

[0036] Furthermore, the outer cover also triggers the dose protection plate and the air intake baffle to reset within the cover closing load stroke.

[0037] 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 entrance of the inhalation channel through the powder metering wheel and compresses the driving torsion spring; at the same time, the return torsion spring drives the air intake baffle to return and rotate and close the airflow channel;

[0038] When the outer cover is in the third cover load stroke, the powder metering wheel is decoupled from the dose protection plate, the drive torsion spring drives the dose protection plate to rotate to the entrance of the inhalation channel, and is limited by the air intake baffle at the entrance of the inhalation channel.

[0039] The angle of the outer cover when it is in the first position is defined as 0 degrees, and the angle of the outer cover when it is in the second position is greater than or equal to 120 degrees and less than or equal to 180 degrees;

[0040] Preferably, the angle of the outer cover when in the second position is 150 degrees;

[0041] The critical angle between the lid-opening free stroke and the lid-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 lid within the lid-opening free stroke is greater than or equal to 0.05 N·m and less than or equal to 0.3 N·m, and the torque of the outer lid within the lid-opening load stroke is greater than or equal to 0 N·m and less than or equal to 0.15 N·m; and / or,

[0042] The lid-opening free stroke includes a first lid-opening sub-free stroke and a second lid-opening sub-free stroke after the first lid-opening sub-free stroke; the critical angle between the first lid-opening sub-free stroke and the second lid-opening sub-free stroke is greater than or equal to 6 degrees and less than or equal to 10 degrees; and / or, the torque of the outer lid within the first lid-opening sub-free 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 lid within the second lid-opening sub-free stroke is greater than or equal to 0.1 N·m and less than or equal to 0.2 N·m; and / or,

[0043] The lid-opening load stroke includes a first lid-opening sub-load stroke and a second lid-opening sub-load stroke after the first lid-opening sub-load stroke; the critical angle between the first lid-opening sub-load stroke and the second lid-opening sub-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 lid within the first lid-opening sub-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 lid within the second lid-opening sub-load stroke is constant, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m; and / or,

[0044] The critical angle between the lid-closing free 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 lid within the lid-closing free 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 lid within the lid-closing load stroke is greater than 0.05 N·m and less than or equal to 0.3 N·m; and / or,

[0045] The lid-closing free stroke includes a first lid-closing sub-free stroke and a second lid-closing sub-free stroke after the first lid-closing sub-free stroke; the critical angle between the first lid-closing sub-free stroke and the second lid-closing sub-free stroke is greater than or equal to 135 degrees and less than or equal to 145 degrees; and / or, the torque of the outer lid within the first lid-closing sub-free 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 lid within the second lid-closing sub-free stroke is constant, which is less than or equal to 0.02 N·m; and / or,

[0046] 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 which are 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.

[0047] The beneficial effects of the present application are as follows: Different from the prior art, the present application discloses a powder inhaler, which includes a functional mechanism, a nozzle and an outer cover. The functional mechanism includes an inhalation channel; the nozzle is connected to the inhalation channel; the outer cover cooperates with the functional mechanism and is limited to rotate back and forth between the first position and the second position; when the outer cover is configured to the first position, the nozzle is blocked, and when the outer cover is configured to the second position, the nozzle is not blocked. Among them, the stroke of the outer cover rotating from the first position to the second position includes an open cover empty stroke and an open cover load stroke after the open cover empty stroke; within the open cover empty stroke, the outer cover does not trigger the action of the functional mechanism; within the open cover load stroke, the outer cover triggers the functional mechanism to deliver powder to the inhalation channel; and / or, the stroke of the outer cover rotating from the second position to the first position includes a closed cover empty stroke and a closed cover load stroke after the closed cover empty stroke; within the closed cover empty stroke, the outer cover does not trigger the action of the functional mechanism, and within the closed cover load stroke, the outer cover triggers the functional mechanism to reset. Through the above arrangement, the powder inhaler achieves good linkage between various functional mechanisms during the process of opening and closing the cover, thereby improving the performance of the powder inhaler. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0049] Figure 1 This is a schematic diagram of the structure of a powder inhaler provided by an embodiment of the present application in an unopened state;

[0050] Figure 2 yes Figure 1 A schematic diagram of the structure of the powder inhaler provided in an open cover state;

[0051] Figure 3 is Figure 1 A schematic structural view of the provided powder inhaler in another open - cover state;

[0052] Figure 4 is Figure 3 A schematic structural view of the provided powder inhaler from another angle;

[0053] Figure 5A is Figure 1 A schematic structural view of the outer cover of the provided powder inhaler from an angle;

[0054] Figure 5B is Figure 5A A schematic structural view of the provided outer cover from another angle;

[0055] Fig. 6A is Figure 1 A schematic structural view of the provided powder inhaler after removing the outer cover from an angle;

[0056] Figure 6B is Figure 1 A schematic structural view of the provided powder inhaler after removing the outer cover from another angle;

[0057] Fig. 7A is Figure 2 A schematic structural view of the provided powder inhaler from another angle;

[0058] Figure 7B is Fig. 7A A partially enlarged schematic view of the provided powder inhaler;

[0059] Fig. 8A is Figure 1 A schematic structural view of the provided powder inhaler after removing the outer cover;

[0060] Figure 8B is Fig. 8A A partially enlarged schematic view of the provided powder inhaler;

[0061] Fig. 9A is Figure 1 A cross - sectional schematic view of the provided powder inhaler after removing the outer cover in one state;

[0062] Fig. 9B is Figure 1 A cross - sectional schematic view of the provided powder inhaler after removing the outer cover in another state;

[0063] Fig. 9C is Figure 1 A cross - sectional schematic view of the provided powder inhaler after removing the outer cover in one state from another angle;

[0064] Fig.9D is Figure 1 A schematic cross-sectional view of the provided powder inhaler at another angle in another state after removing the outer cover;

[0065] Fig.9E is Fig. 9C A partial enlarged schematic view of region A of

[0066] Fig.9F is Fig.9D A partial enlarged schematic view of region A of

[0067] Figure 9G is Fig. 9C A partial enlarged schematic view of region B of

[0068] Figure 9H is Fig. 9C A schematic structural view of the L-shaped air inlet channel of the provided powder inhaler;

[0069] Fig. 10A is Figure 1 A schematic structural view of the driving cam of the provided powder inhaler at an angle;

[0070] Fig. 10B is Fig. 10A A schematic structural view of the driving cam provided at another angle;

[0071] Fig. 10C is a schematic structural view of the driving cam provided by 10A at yet another angle,

[0072] Fig.11 is Figure 1 A schematic structural view of the airbag pressing part of the provided powder inhaler;

[0073] Fig. 12A is Figure 1 A schematic structural view of the powder metering wheel of the powder delivery mechanism of the provided powder inhaler when in the third position in the powder container;

[0074] Fig. 12B is Figure 1 A schematic structural view of the powder metering wheel of the powder delivery mechanism of the provided powder inhaler when in the fourth position in the powder container;

[0075] Fig.13A is Figure 1 A schematic structural view of the powder container of the provided powder inhaler at an angle;

[0076] Fig. 13B is Fig.13A A schematic structural view of the powder container provided at another angle;

[0077] Fig.14A is Figure 1Schematic structural diagram of the powder metering wheel of the provided powder inhaler at an angle;

[0078] Fig. 14B It is the schematic structural diagram of the powder metering wheel provided by 14A at another angle;

[0079] Fig.15A It is Figure 1 Schematic structural diagram of the inhalation trigger device of the provided powder inhaler when in a certain state on the powder container;

[0080] Fig. 15B It is Fig.15A Schematic structural diagram of the inhalation trigger device provided when in another state on the powder container;

[0081] Fig.16A It is Fig.15A Schematic structural diagram of the inhalation trigger device provided after removing the powder container;

[0082] Fig. 16B It is Fig. 15B Schematic structural diagram of the inhalation trigger device provided after removing the powder container;

[0083] Fig.17A It is Fig.16A Schematic structural diagram of the inhalation trigger device provided at another angle;

[0084] Fig. 17B It is Fig. 16B Schematic structural diagram of the inhalation trigger device provided at another angle;

[0085] Fig.18A It is Figure 1 Exploded schematic structural diagram of the counting mechanism of the provided powder inhaler;

[0086] Fig.18B It is Fig.18A Assembly schematic structural diagram of the counting mechanism provided;

[0087] Fig.19A It is Fig.18A Schematic structural diagram of the counter base of the counting mechanism provided at an angle;

[0088] Fig.19B It is Fig.19A Schematic structural diagram of the counter base provided at another angle;

[0089] Fig. 20 It is Figure 1 Schematic structural diagram of the dose protection plate of the inhalation trigger device of the provided powder inhaler;

[0090] Fig.21A It is Figure 1Schematic assembly cross-section diagram of the powder metering wheel and dose protection plate of the provided powder inhaler in one state;

[0091] Fig.21B is Figure 1 Schematic assembly cross-section diagram of the powder metering wheel and dose protection plate of the provided powder inhaler in another state;

[0092] Fig. 21C is Fig.21A Partial enlarged schematic diagram;

[0093] Fig.21D is Fig.21B Partial enlarged schematic diagram;

[0094] Fig.21E is Figure 1 Schematic assembly cross-section diagram of the powder metering wheel and dose protection plate of the provided powder inhaler in yet another state;

[0095] Fig.21F is Fig.21E Partial enlarged schematic diagram;

[0096] Fig.22A is Figure 1 Schematic diagram of the intake baffle of the inhalation trigger device of the provided powder inhaler at an angle;

[0097] Fig. 22B is Fig.21A Schematic diagram of the intake baffle at another angle;

[0098] Fig. 22C is Fig.22A Schematic diagram of the intake baffle at yet another angle;

[0099] Fig.23A is Figure 1 Schematic diagram of the front housing of the provided powder inhaler at an angle;

[0100] Fig. 23B is Figure 1 Schematic diagram of the front housing of the provided powder inhaler at another angle;

[0101] Fig.24A is Fig.18A Schematic diagram of the units digit wheel of the counting mechanism at an angle;

[0102] Fig. 24B is Fig.24A Schematic diagram of the units digit wheel at another angle;

[0103] Fig.25 is Fig.18A Schematic diagram of the tens digit wheel of the counting mechanism;

[0104] Fig.26 is a schematic cross-sectional view of another embodiment of the powder inhaler provided by the present application;

[0105] Fig. 27 is a schematic cross-sectional view of yet another embodiment of the powder inhaler provided by the present application;

[0106] Fig.28 is Figure 1 a cyclic schematic diagram of the process of opening the switch cover of the powder inhaler provided;

[0107] Fig.29A is Figure 1 a schematic curve diagram of the opening angle and torque of one embodiment of the process of opening the cover of the powder inhaler provided;

[0108] Fig.29B is Figure 1 a schematic curve diagram of the closing angle and torque of one embodiment of the process of closing the cover of the powder inhaler provided;

[0109] Fig. 30A is Figure 1 a schematic curve diagram of the opening angle and torque of another embodiment of the process of opening the cover of the powder inhaler provided;

[0110] Fig. 30B is Figure 1 a schematic curve diagram of the closing angle and torque of another embodiment of the process of closing the cover of the powder inhaler provided;

[0111] Fig.31A is Figure 1 a schematic bottom view structure diagram of the powder inhaler provided at an angle;

[0112] Fig.31B is Fig.31A a schematic diagram of the powder inhaler provided in a state of being placed on a horizontal plane;

[0113] Fig.31C is Fig.31A a schematic diagram of the powder inhaler provided in a handheld state;

[0114] Fig.31D is Fig.31A a schematic diagram of the powder inhaler provided after opening the cover in a handheld state;

[0115] Fig.31E is Fig.31A a schematic diagram of the powder inhaler provided in a mouth-sucking state. Detailed implementation manners

[0116] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0117] The terms "first", "second", and "third" in the embodiments of the present application are only for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes unlisted steps or units, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0118] Referring to "embodiment" in this context means that a specific feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The phrase appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0119] Referring to Figures 1 to 11 , Figure 1 is a schematic structural diagram of a powder inhaler provided in an embodiment of the present application in an unopened state, Figure 2 is Figure 1 a schematic structural diagram of the powder inhaler provided in Figure 3 is Figure 1 a schematic structural diagram of the powder inhaler provided in another opened state, Figure 4 is Figure 3 a schematic structural diagram of the powder inhaler provided in another angle, Figure 5A is Figure 1 a schematic structural diagram of the outer cover of the powder inhaler provided in an angle, Figure 5B is Figure 5A a schematic structural diagram of the outer cover provided in another angle, Fig. 6A is Figure 1 a schematic structural diagram of the powder inhaler after removing the outer cover in an angle, Figure 6B is Figure 1 Schematic structural view of the provided powder inhaler at another angle after removing the outer cover, Fig. 7A is Figure 2 Schematic structural view of the provided powder inhaler at another angle, Figure 7B is Fig. 7A Partial enlarged schematic view of the provided powder inhaler, Fig. 8A is Figure 1 Schematic structural view of the provided powder inhaler after removing the outer cover, Figure 8B is Fig. 8A Partial enlarged schematic view of the provided powder inhaler, Fig. 9A is Figure 1 Cross-sectional schematic view of the provided powder inhaler at a certain state after removing the outer cover, Fig. 9B is Figure 1 Cross-sectional schematic view of the provided powder inhaler at another state after removing the outer cover, Fig. 9C is Figure 1 Cross-sectional schematic view of the provided powder inhaler at another angle at a certain state after removing the outer cover, Fig.9D is Figure 1 Cross-sectional schematic view of the provided powder inhaler at another angle at another state after removing the outer cover, Fig.9E is Fig. 9C Partial enlarged schematic view of region A, Fig.9F is Fig.9D Partial enlarged schematic view of region A, Figure 9G is Fig. 9C Partial enlarged schematic view of region B, Figure 9H is Figure 1 Schematic structural view of the L-shaped air inlet channel of the provided powder inhaler, Fig. 10A is Figure 1 Schematic structural view of the driving cam of the provided powder inhaler at an angle, Fig. 10B is Fig. 10A Schematic structural view of the driving cam at another angle, Fig. 10C is Schematic structural view of the driving cam provided by 10A at yet another angle, Fig.11 is Figure 1 Schematic structural view of the airbag pressing part of the provided powder inhaler.

[0120] See Figures 1 to 4 , this application provides a powder inhaler, which includes a housing assembly (not labeled in the figure), a functional mechanism ( Figure 1-Figure 4not shown) and an outer cover 4; wherein, the functional mechanism is arranged inside the housing assembly, the outer cover 4 is connected to the housing assembly, and can be limited to rotate back and forth between a first position and a second position. When the outer cover 4 is in the first position, the outer cover 4 is in a closed state. When the outer cover 4 is in the second position, the outer cover 4 is in a fully opened state. Wherein, the outer cover 4 is linked and cooperated with the functional mechanism. Through the reciprocating rotation of the outer cover 4 between the first position and the second position, the linkage actions of each functional mechanism are realized, so that the powder inhaler realizes the powder distribution function such as medicine powder. The reciprocating rotation in this application refers to reciprocating 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.

[0121] Specifically, the housing assembly includes a front housing 1, a rear housing 2, and an upper housing 3. Among them, the front housing 1, the rear housing 2, and the upper housing 3 are connected and cooperated with each other to form a receiving space. The functional mechanism is arranged in the receiving space. The outer cover 4 is rotatably connected to the bottom end of the housing assembly, so that it can rotate back and forth between the first position and the second position to realize the opening and closing processes. The rotation connection mode of the outer cover 4 with the bottom end of the housing assembly can be rotation connection through a rotating shaft or rotation connection through an arc-shaped slide rail. The shapes and structures of the front housing 1, the rear housing 2, the upper housing 3, and the outer cover 4 are not limited, and the materials can be metal or plastic, etc.

[0122] See Figure 1 , FIG. 5A to FIG. 9B , the outer cover 4 includes two connecting portions 406 arranged oppositely along a first direction. The two connecting portions 406 are respectively rotatably connected to opposite sides of the bottom end of the housing assembly and protrude from the bottom end of the housing assembly. Specifically, the two connecting portions 406 of the outer cover 4 are assembled and connected to the housing assembly by the cooperation of a rotating shaft and a hole. See Figure 5A , Figure 5B , Fig. 6A and Fig. 8A and Figure 8B , Fig. 9A and Fig. 9B , the powder inhaler further includes a driving gear 5. The driving gear 5 is arranged inside the housing assembly. A driving shaft 501 is arranged on one end surface of the driving gear 5. A first shaft hole 401 and a driving hole 402 are arranged on one of the connecting portions 406 of the outer cover 4. A second shaft hole 404 is arranged on the other connecting portion 406 of the outer cover 4. Cylinders 105 are respectively arranged on the front housing 1 corresponding to the first shaft hole 401 and the second shaft hole 404. The cylinders 105 are defined as first cylinders. The first shaft hole 401 and the second shaft hole 404 of the outer cover 4 are matched with the corresponding cylinders 105 of the front housing 1. The driving hole 402 of the outer cover 4 is matched with the driving shaft 501 of the driving gear 5, so that the outer cover 4 is rotatably connected to the bottom end of the housing assembly.

[0123] Such as Figure 6BAs shown, the powder inhaler further includes a sealing ring 6 disposed between the connecting portion 406 of the outer cover 4 and the driving gear 5 for sealing, so as to ensure the consistency of the air passage and the suction resistance of the powder inhaler, and prevent gas from entering the housing assembly between the driving gear 5 and the connecting portion 406 of the outer cover 4.

[0124] See Figure 5A , Fig. 6A and Fig. 7A and Figure 7B , an arc-shaped rib 405 is further provided on one of the connecting portions 406 of the outer cover 4, and a sound-making elastic arm 108 is provided on the front housing 1. The arc-shaped rib 405 on the outer cover 4 is used to cooperate with the sound-making elastic arm 108 on the front housing 1 to give a sound indication 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 sound-making elastic arm 108 is located outside the arc-shaped rib 405, and the sound-making elastic arm 108 moves along the outer circumference of the arc-shaped rib 405. After the outer cover 4 is opened in place, that is, when it rotates to the second position, the sound-making elastic arm 108 cooperates with the arc-shaped rib 405 to give a sound indication when the cover is opened in place. During the closing process of the outer cover 4, that is, during the process of the outer cover 4 rotating and resetting from the second position to the first position, the outer cover 4 is located inside the arc-shaped rib 405, and the outer cover 4 moves along the inner circumference of the arc-shaped rib 405. After the outer cover 4 is closed in place, that is, when it rotates to the first position, the sound-making elastic arm 108 cooperates with the arc-shaped rib 405 to give a sound indication when the cover is closed in place. For example, in a preferred embodiment, the angle of the outer cover 4 in the first position is defined as 0 degrees, and the angle of the outer cover 4 in the second position relative to the first position is 150 degrees; during the opening process of the outer cover 4, when the outer cover 4 rotates from 0 degrees to 150 degrees, that is, when the rotation angle of the outer cover 4 is 150 degrees, the arc-shaped rib 405 of the outer cover 4 contacts the sound-making elastic arm 108 of the front housing 1 to realize the function of giving a sound indication when the cover is opened in place. The angle of the outer cover 4 in the second position is not limited to 150 degrees and can be designed as needed. For example, it can be greater than or equal to 120 degrees and less than or equal to 180 degrees, as long as the outlet 102 of the mouthpiece 101 can be exposed when the outer cover 4 is in the second position.

[0125] See Fig. 6A and FIG. 12A to FIG. 13B , the powder inhaler has an inhalation channel 706 and a mouthpiece 101. The mouthpiece 101 is communicated with the inhalation channel 706 to facilitate the user to inhale the medicinal powder from the outlet 102 position of the mouthpiece 101. Specifically, the housing assembly includes a mouthpiece 101. The mouthpiece 101 is disposed on the front housing 1 and sleeved on the inhalation channel 706. When the outer cover 4 is configured in the first position, the outer cover 4 blocks the outlet 102 of the mouthpiece 101. When the outer cover 4 is configured in the second position, the outlet 102 of the mouthpiece 101 is exposed.

[0126] Specifically, as Figure 5AAs shown, there are two driving holes 402 provided on the connecting portion 406 of the outer cover 4. The two driving holes 402 are respectively arranged on both sides of the first shaft hole 401. On one end face of the driving gear 5, there are two driving shafts 501. The two driving shafts 501 are respectively arranged on both sides of the cylinder 105 of the front housing 1. The two driving holes 402 are in one-to-one correspondence and mating connection with the two driving shafts 501. In other embodiments, the driving holes 402 and the driving shafts 501 can also be correspondingly arranged in other numbers such as one or three. It can be understood that the connection between the outer cover 4 and the driving gear 5 is not limited to the above method, and they can also be integrally formed, glued or welded, as long as the rotation of the outer cover 4 can drive the rotation of the driving gear 5.

[0127] As Fig. 9A shown, the powder inhaler further includes an intermediate gear 13. The intermediate gear 13 is arranged inside the housing assembly, and the intermediate gear 13 meshes with the driving gear 5. Through the mating connection between the outer cover 4 and the driving gear 5, the linkage of the outer cover 4 driving the driving gear 5 and the functional mechanism is realized. Specifically, the outer cover 4 rotates around the cylinder 105 of the front housing 1. The driving holes 402 of the outer cover 4 drive the driving gear 5 to rotate synchronously, and then drive the linkage of each functional mechanism through the intermediate gear 13.

[0128] The functional mechanism includes a gas compression mechanism, a powder delivery mechanism, an inhalation trigger mechanism, a counting mechanism, etc. Through the rotation during the opening process of the outer cover 4, it drives the gas compression mechanism to realize the gas compression function respectively, and drives the powder delivery mechanism to realize the powder delivery function after the gas compression is completed, so as to deliver powders such as medicinal powders to the position of the inhalation channel 706 of the powder inhaler, and realize the inhalation trigger function through the inhalation trigger mechanism, so as to facilitate the user to inhale the medicinal powder. Further, when the outer cover 4 is closed, it drives the gas compression mechanism, the powder delivery mechanism and the inhalation trigger mechanism to reset, and drives the counting mechanism to count.

[0129] The following introduces each functional mechanism.

[0130] (1) Gas compression mechanism

[0131] Refer to FIG. 12A to FIG. 14B , Fig. 12A which Figure 1 is a schematic structural diagram of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided when it is in the third position in the powder container, Fig. 12B which Figure 1 is a schematic structural diagram of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided when it is in the fourth position in the powder container, Fig.13A which Figure 1 is a schematic structural diagram of the powder container of the powder inhaler provided at an angle, Fig. 13B which Fig.13A is a schematic structural diagram of the powder container provided at another angle, Fig.14A which Figure 1Schematic structural diagram of the powder metering wheel of the provided powder inhaler at an angle Fig. 14B is a schematic structural diagram of the powder metering wheel provided by 14A at another angle.

[0132] See FIG. 5A to FIG. 14B . Specifically, the air compression mechanism includes an airbag pressing member 17, an air compression airbag 18, an elastic member 19, and a driving cam 12. To facilitate understanding of the function of the air compression mechanism, the powder delivery mechanism is introduced here. The powder delivery mechanism includes a powder container 7 and a powder metering wheel 9. The powder metering wheel 9 has a dose cup 902. The powder container 7 has a storage cavity 715 for storing powder. One end of the elastic member 19 acts on the airbag pressing member 17. The airbag pressing member 17 is used to squeeze the air compression airbag 18 under the drive of the elastic member 19, so that the air compression airbag 18 is compressed to achieve the air compression function; the airbag pressing member 17 is also used to squeeze the elastic member 19 under the action of the driving cam 12 and drive the air compression airbag 18 to stretch.

[0133] See FIG. 12A to FIG. 13B . Specifically, the first end of the storage cavity 715 has a powder outlet 713, and the second end has an air compression port 714. The air compression airbag 18 is arranged at the second end of the storage cavity 715 and communicates with the air compression port 714. Specifically, the outer side surface of the second end of the storage cavity 715 has an annular rib 701. One end of the air compression airbag 18 close to the powder container 7 is engaged with the annular rib 701 of the powder container 7 to realize the connection between the air compression airbag 18 and the powder container 7. The airbag pressing member 17 is movably sleeved outside the air compression airbag 18 and the storage cavity 715. The elastic member 19 can be an elastic structural member such as a spring. The airbag pressing member 17 is used to squeeze the air compression airbag 18 under the drive of the elastic member 19. Among them, the airbag pressing member 17 can move back and forth between a fifth position and a sixth position, so that the air compression airbag 18 compresses air into the storage cavity 715 to achieve the air compression function, facilitating the extrusion of the powder in the storage cavity 715 from the powder outlet 713 into the dose cup 902 of the powder metering wheel 9.

[0134] As Fig. 9A , Fig. 9B , Fig.11 , Fig.13A and Fig. 13B shown, the top wall of the airbag pressing member 17 has a fixing hole 1701 for connecting the top of the air compression airbag 18. For example, the top of the air compression airbag 18 can pass through the fixing hole 1701, and a part of the air compression airbag 18 is limited outside the top wall of the airbag pressing member 17, and another part is limited on the side of the top wall of the airbag pressing member 17 close to the air compression port 714, so as to drive the air compression airbag 18 to expand and contract in cooperation with the movement of the airbag pressing member 17 and the elastic member 19. Driving the air compression airbag 18 to expand and contract through the airbag pressing member 17 can improve the air compression efficiency of the air compression airbag 18 and avoid abnormal operation of the air compression airbag 18 caused by the inability of the air to reset.

[0135] The powder inhaler further comprises a driving cam 12, which is disposed in the housing assembly. Fig. 9A The powder inhaler also includes a gear bracket 14, which is arranged in the housing assembly, and a driving cam 12 is assembled on the gear bracket 14, one end of the gear bracket 14 is assembled and connected with the powder metering wheel 9, and the other end is assembled and connected with the driving cam 12. The outer cover 4 drives the driving gear 5 to move in conjunction, the driving gear 5 is meshed with the intermediate gear 13, and the intermediate gear 13 is meshed with the driving cam 12, so that the driving cam 12 and the driving gear 5 rotate in the same direction. It can be understood that the present application can also omit the driving gear 5 and / or the intermediate gear 13, as long as the cam 12 can be driven to rotate by rotating the outer cover 4. The driving cam 12 and the elastic member 19 are used to drive the air bag pressing member 17 to move back and forth between the fifth position and the sixth position, thereby driving the compressed air bag 18 to expand and contract, so as to realize the compressed air and reset functions. Specifically, the elastic member 19 is arranged on one side of the top wall of the airbag pressure piece 17, one end of the elastic member 19 abuts against the top wall of the airbag pressure piece 17, and the other end abuts against the top wall of the upper shell 3 to drive the airbag pressure piece 17 to move; the driving cam 12 rotates to make way for the airbag pressure piece 17, and the elastic member 19 drives the airbag pressure piece 17 to move from the fifth position to the sixth position; the driving cam 12 squeezes the airbag pressure piece 17, and the airbag pressure piece 17 resets and moves from the sixth position to the fifth position and squeezes the elastic member 19.

[0136] See also FIG. 10A to FIG. 11 , the end of the side wall of the airbag pressing piece 17 away from the top wall has a convex rod 1704, the end of the convex rod 1704 away from the top wall of the airbag pressing piece 17 has an arc surface 1703, the driving cam 12 has a cam curved surface 1202, and the arc surface 1703 is used to cooperate with the cam curved surface 1202 of the driving cam 12 to realize the reciprocating movement of the airbag pressing piece 17 between the fifth position and the sixth position. Specifically, when the airbag pressing piece 17 is in the fifth position, the arc surface 1703 of the convex rod 1704 of the airbag pressing piece 17 abuts against the side of the driving cam 12, and the arc surface 1703 of the airbag pressing piece 17 is limited in the arc groove 1201 of the driving cam 12. At this time, the top wall of the airbag pressing piece 17 compresses the elastic member 19 to make it in a compressed state, and the top wall of the airbag pressing piece 17 stretches the compressed airbag 18 to make it in an extended state. During the opening process of the outer cover 4, the driving cam 12 is driven to rotate, the elastic member 19 is continuously stretched, and the elastic force of the elastic member 19 drives the airbag pressure member 17 to move vertically downward, that is, the elastic member 19 drives the airbag pressure member 17 to move from the fifth position to the sixth position, and the arc surface 1703 of the airbag pressure member 17 moves along the cam surface 1202 of the driving cam 12. The airbag pressure member 17 moves downward to compress the compressed airbag 18 and pressurize air into the storage chamber 715.

[0137] In one embodiment, the tooth number ratio between the driving gear 5 and the driving cam 12 is 18:15. That is, when the outer cover 4 is opened by 150°, the driving gear 5 rotates synchronously by 150°. At this time, the rotation angle of the driving cam 12 is 180°. It can be understood that setting the tooth number ratio between the driving gear 5 and the driving cam 12 to 18:15 can reduce the volume of the driving gear 5 and save space. In other embodiments, the powder inhaler may not be provided with the driving gear 5 and the intermediate gear 13, and the outer cover 4 is directly linked with the driving cam 12. The rotation of the outer cover 4 drives the driving cam 12 to rotate, so as to realize the linkage of the functional mechanism.

[0138] Specifically, as FIG. 9A to FIG. 11 shown, the driving cam 12 includes a body portion 1200 and a gear 1203. The gear 1203 is coaxially connected to the body portion 1200 and is used to drive the body portion 1200 to rotate. The gear 1203 meshes with the intermediate gear 13. Among them, one surface of the body portion 1200 has a guiding groove 1209. The side surface of the guiding groove 1209 is a cam surface 1202. The cam surface 1202 cooperates with the arc surface 1703 of the airbag pressing member 17 to realize the reciprocating movement of the airbag pressing member 17 between the fifth position and the sixth position. Specifically, the driving cam 12 has a central hole 1204, which is defined as the first central hole. The gear 1203 is arranged on one surface of the body portion 1200 and surrounds the central hole 1204. The central hole 1204 penetrates through the body portion 1200 and the gear 1203. The central hole 1204 of the driving cam 12 is sleeved on the gear bracket 14 of the powder inhaler. The guiding groove 1209 is located on the surface of the body portion 1200 facing the gear 1203, and the guiding groove 1209 is arranged at an interval from the gear 1203. The airbag pressing member 17 moves up and down along the longitudinal direction between the fifth position and the sixth position. In this application, the cam surface 1202 of the driving cam 12 directly abuts against the convex rod 1704 of the airbag pressing member 17, which simplifies the structure of the air compression mechanism and improves the operation stability of the air compression mechanism. In one embodiment, the air compression mechanism only includes four independent elements: the airbag pressing member 17, the air compression airbag 18, the elastic member 19 and the driving cam 12, making the air compression mechanism have a simple structure.

[0139] In some embodiments, the end of the convex rod 1704 of the airbag pressing member 17 away from the top wall has a tip, and the end surface of the tip is an arc surface 1703. The outer peripheral side surface of the body portion 1200 of the driving cam 12 has an arc-shaped groove 1201. When the airbag pressing member 17 is configured at the fifth position, the tip of the convex rod 1704 is embedded into the arc-shaped groove 1201 of the body portion 1200 to realize the initial positioning and preliminary limiting of the airbag pressing member 17.

[0140] In a specific embodiment, the arc-shaped groove 1201 is a circular arc-shaped groove, the bottom surface of the arc-shaped groove 1201 is circular arc-shaped, and the arc surface 1703 of the convex rod 1704 is a circular arc surface. It can be understood that the arc-shaped groove 1201 is provided on the cam surface 1202 of the driving cam 12, and the arc surface 1703 of the convex rod 1704 is embedded in the arc-shaped groove 1201 for initial positioning and preliminary limiting of the airbag pressing member 17, so that the movement of the air pressure mechanism needs to overcome the resistance of the upward movement of the arc surface 1703 of the airbag pressing member 17 to break away from the arc-shaped groove 1201, which can effectively prevent the mis-triggering of the air pressure mechanism.

[0141] In a specific embodiment, the bottom surface of the arc-shaped groove 1201 is circular arc-shaped, and the arc surface 1703 of the convex rod 1704 is a circular arc surface. During the process of the arc surface 1703 of the convex rod 1704 moving from one side of the bottom surface of the arc-shaped groove 1201 to the other side, the convex rod 1704 remains stationary, and the outer cover 4 rotates for an idle stroke.

[0142] Further, referring to 9A to 13B , the side wall of the storage cavity 715 of the powder container 7 has a ventilation hole 709, and the side wall of the airbag pressing member 17 has a pressure relief hole 1702. As shown in Fig. 9C and Fig.9E , when the airbag pressing member 17 is configured in the fifth position, the side wall of the airbag pressing member 17 blocks the ventilation hole 709, and the ventilation hole 709 is not communicated with the pressure relief hole 1702; as shown in Fig.9D and Fig.9F , when the airbag pressing member 17 is configured in the sixth position, the pressure relief hole 1702 is communicated with the ventilation hole 709. During the process of the airbag pressing member 17 moving from the fifth position to the sixth position, first, the air pressure airbag 18 is used to press air into the storage cavity 715, so as to fill and compact the powder in the storage cavity 715 into the dosing cup 902 of the powder metering wheel 9 through the powder outlet 713, which is convenient for improving the consistency of powder filling. After the pressure relief hole 1702 is communicated with the ventilation hole 709, the storage cavity 715 is depressurized to release the pressure in the storage cavity 715 of the powder container 7 to normal pressure, so as to avoid excessive pressure in the storage cavity 715 due to non-depressurization in the storage cavity 715 during the subsequent powder delivery process, and further avoid powder leakage from the gap when the powder metering wheel 9 of the powder delivery mechanism rotates, reducing powder waste. That is, during the process of the airbag pressing member 17 moving from the fifth position to the sixth position, the air pressure process is first performed, and then the pressure relief process is performed. The pressure relief process is performed in the later stage of the downward stroke of the airbag pressing member 17. Since the pressure relief process of the storage cavity 715 in the present application is completed before the powder metering wheel 9 rotates from the third position to the fourth position, therefore, after the powder metering wheel 9 starts to rotate from the third position to the fourth position, less powder will leak from the powder outlet 713 under the air pressure.

[0143] Specifically, referring to Fig. 9Cand Fig.9D In some embodiments, a filter membrane 25 is provided at the second end of the storage chamber 715. The filter membrane 25 is located at the air compression port 714 and is spaced from the port of the air compression port 714, isolating the space of the air compression airbag 18 from the internal space of the storage chamber 715. Among them, the filter membrane 25 can be a waterproof and breathable membrane, which can filter impurities in powders such as medicinal powders and can also filter water vapor, etc., to prevent the powders in the storage chamber 715 from getting damp. The ventilation hole 709 is provided on the side wall of the storage chamber 715, and one end of the ventilation hole 709 communicates with the space between the filter membrane 25 and the air compression airbag 18, that is, the ventilation hole 709 is not directly communicated with the inside of the storage chamber 715, and it is relatively independent of the inside of the storage chamber 715. After the ventilation hole 709 is communicated with the pressure relief hole 1702, the gas in the space between the filter membrane 25 and the air compression airbag 18 can be discharged after passing through the ventilation hole 709 and the pressure relief hole 1702 in sequence, so as to relieve the pressure of the space between the filter membrane 25 and the air compression airbag 18. At the same time, since the filter membrane 25 is a breathable membrane, the gas in the storage chamber 715 can also enter the space between the filter membrane 25 and the air compression airbag 18 through the filter membrane 25 and then leak out through the ventilation hole 709, so as to relieve the pressure of the storage chamber 715, prevent the ventilation hole 709 from being directly communicated with the inside of the storage chamber 715, and directly leak the gas in the storage chamber 715 from the ventilation hole 709 during the pressure relief process, resulting in the flying or leakage of the medicinal powder in the storage chamber 715. During the stretching process of the air compression airbag 18, that is, during the air intake process of the air compression airbag 18, external gas enters the space between the filter membrane 25 and the air compression airbag 18 from the ventilation hole 709, and then enters the storage chamber 715 through the filter membrane 25, preventing the ventilation hole 709 from being directly communicated with the inside of the storage chamber 715, and directly bringing external water molecules into the storage chamber 715 from the ventilation hole 709 during the air intake process of the air compression airbag 18, resulting in the flying or dampening of the medicinal powder in the storage chamber 715 and causing waste. In addition, the filter membrane 25 can also prevent the medicinal powder from entering the air compression airbag 18 from the storage chamber 715, causing the problem of medicinal powder waste.

[0144] See Fig.13A As shown in Fig.13A , a receiving cavity 702 is further provided on the side wall of the storage chamber 715 of the powder container 7. The receiving cavity 702 is used to store desiccants. The storage chamber 715 and the receiving cavity 702 have a common side wall, and the common side wall can be made of a water-permeable material, so that the desiccants in the receiving cavity 702 can absorb the water vapor in the storage chamber 715, preventing the powders in the storage chamber 715 from getting damp.

[0145] In a preferred embodiment, during the movement of the airbag pressing member 17 from the fifth position to the sixth position, the downward pressing stroke of the airbag pressing member 17 is in the range of 2 mm - 6 mm. For example, in a specific embodiment, the downward pressing stroke of the airbag pressing member 17 is 3.5 mm. Among them, the first 3 mm of the downward pressing stroke is the air compression stroke, and the last 0.5 mm of the downward pressing stroke is the pressure relief stroke. When the downward pressing stroke of the airbag pressing member 17 reaches 3 mm, the pressure relief hole 1702 and the ventilation hole 709 are at the critical point of connection. When the downward pressing stroke of the airbag pressing member 17 is between 3 mm and 3.5 mm, the pressure relief hole 1702 and the ventilation hole 709 are connected to achieve pressure relief. The angle of the outer cover 4 when it is in the first position is defined as 0 degrees, and the angle of the outer cover 4 when it is in the second position is 150 degrees. When the downward pressing stroke of the airbag pressing member 17 of the air compression mechanism is 3.5 mm, that is, when the airbag pressing member 17 is in the sixth position, the angle of the outer cover 4 is 62.5 degrees, and the rotation angle of the driving gear 5 driven is 62.5 degrees, and the corresponding rotation angle of the driving cam 12 is 75 degrees.

[0146] More preferably, during the opening process of the outer cover 4, when the rotation angle of the outer cover 4 is 55 degrees, the downward pressing stroke of the airbag pressing member 17 reaches 3 mm, and the air compression mechanism completes the process of compressing and discharging the powder in the powder container 7, that is, the air compression process. When the rotation angle of the outer cover 4 is 62.5 degrees, the pressure relief process is completed, and the compressed gas in the powder container 7 is released to atmospheric pressure, avoiding powder leakage when the powder metering wheel 9 rotates. It can be understood that the selection of the above angles is only an example, and other angle ranges can also be selected.

[0147] See FIG. 10A to FIG. 10C , in some embodiments, the cam surface 1202 includes a first curved surface segment 1211 and a second curved surface segment 1212 connected to each other. The second curved surface segment 1212 is located at one end of the first curved surface segment 1211 away from the arc-shaped groove 1201. Among them, the first curved surface segment 1211 is a non-circular arc surface, the second curved surface segment 1212 is a circular arc surface, and the second curved surface segment 1212 is concentrically arranged with the outer peripheral side surface of the main body portion 1200.

[0148] It can be understood that by setting the first curved surface segment 1211 as a non-circular arc surface, during the closing process of the outer cover 4 of the powder inhaler, the driving cam 12 rotates in the reverse direction, and the rotation of the first curved surface segment 1211 drives the airbag pressing member 17 to reset from the sixth position to the fifth position. Specifically, during the process of the airbag pressing member 17 resetting from the sixth position to the fifth position, the arc surface 1703 of the convex rod 1704 of the airbag pressing member 17 abuts against the first curved surface segment 1211. Since the first curved surface segment 1211 is a non-circular arc surface, the reverse rotation of the first curved surface segment 1211 pushes the convex rod 1704 of the airbag pressing member 17 to move upward continuously, thereby realizing the reset of the airbag pressing member 17.

[0149] Preferably, the first curved surface segment 1211 includes a first arc surface segment 1214, a plane segment 1215, and a second arc surface segment 1216 that are connected to each other. The plane segment 1215 is located between the first arc surface segment 1214 and the second arc surface segment 1216, and the plane segment 1215 is located at one end of the first arc surface segment 1214 away from the arc-shaped groove 1201. During the process of opening the outer cover 4, when the airbag pressing member 17 moves from the fifth position to the sixth position, first, it is necessary to overcome the resistance of the side wall of the arc-shaped groove 1201 near the first arc surface segment 1214 to the arc surface 1703 of the convex rod 1704, so that the tip of the convex rod 1704 disengages from the arc-shaped groove 1201. This process is the empty stroke of opening the cover and requires a relatively large torque to prevent accidental opening of the cover.

[0150] In an embodiment, the angle of the outer cover 4 at the first position is defined as 0 degrees, the angle of the outer cover 4 at the second position is 150 degrees, and the process of the outer cover 4 rotating from 0 degrees to 12 degrees is the empty stroke of opening the cover. Among them, the process of the outer cover 4 rotating from 0 degrees to 8 degrees is the first empty stroke of opening the cover, and the process of the outer cover 4 rotating from 8 degrees to 12 degrees is the second empty stroke of opening the cover. During the first empty stroke of opening the cover, the outer cover 4 rotates so that the arc surface 1703 of the tip of the convex rod 1704 abuts from the end of the arc-shaped groove 1201 away from the first arc surface segment 1214 to the end of the arc-shaped groove 1201 near the first arc surface segment 1214, that is, the arc surface 1703 of the tip of the convex rod 1704 slides across the bottom surface of the arc-shaped groove 1201. Preferably, the torque during this process is 0.05 N·m, which can effectively prevent accidental opening of the cover due to non-human factors. During the second empty stroke of opening the cover, the outer cover 4 rotates to make the arc surface 1703 of the tip of the convex rod 1704 abut from the end of the arc-shaped groove 1201 near the first arc surface segment 1214 to the first arc surface segment 1214, that is, it is necessary to disengage the arc surface 1703 of the tip of the convex rod 1704 from the arc-shaped groove 1201, which requires a larger torque compared to the first empty stroke of opening the cover. Preferably, the torque during the second empty stroke of opening the cover is 0.15 N·m. Setting a greater resistance to opening the cover can more effectively prevent accidental opening of the cover.

[0151] During the process of opening the outer cover 4, when the outer cover 4 rotates to 12 degrees, the arc surface 1703 of the tip of the convex rod 1704 of the airbag pressing member 17 disengages from the arc-shaped groove 1201 and abuts on the first arc surface segment 1214, and the empty stroke of opening the outer cover 4 is completed. After that, during the process of the outer cover 4 rotating from 12 degrees to 62.5 degrees, the air pressure mechanism performs the air pressure process and the pressure relief process, and at this time, the outer cover 4 performs the first load stroke of opening the cover.

[0152] When the outer cover 4 rotates to 12 degrees, the arc surface 1703 at the tip of the convex rod 1704 has disengaged from the arc-shaped groove 1201. The outer cover 4 will instantaneously open and rotate instantaneously from 12 degrees to 55 degrees, driving the drive cam 12 to rotate instantaneously to 66 degrees. At this time, the convex rod 1704 of the airbag pressing member 17 will also instantaneously move downward. The arc surface 1703 at the tip of the convex rod 1704 instantaneously moves to abut against one end of the plane section 1215 close to the second arc surface section 1216. The downward stroke of the convex rod 1704 of the airbag pressing member 17 reaches 3 mm, and the air compression mechanism realizes the function of instantaneously compressing air. When the outer cover 4 rotates to 55 degrees, the pressure relief hole 1702 and the ventilation hole 709 are at the communication critical point. During the process of the outer cover 4 rotating from 55 degrees to 62.5 degrees, the drive cam 12 rotates from 66 degrees to 75 degrees. The tip of the convex rod 1704 of the airbag pressing member 17 abuts from one end of the second arc surface section 1216 close to the plane section 1215 to one end of the second arc surface section 1216 far from the plane section 1215. That is, the tip of the convex rod 1704 slides over the second arc surface section 1216. During this process, the downward stroke of the convex rod 1704 of the airbag pressing member 17 is between 3 mm and 3.5 mm, and the pressure relief hole 1702 and the ventilation hole 709 communicate to realize pressure relief. The torque of the outer cover 4 is constant within the first lid-opening load stroke. Preferably, the torque of the outer cover 4 within the first lid-opening load stroke is 0 N·m. That is, the torque during the process of the outer cover 4 rotating from 12 degrees to 62.5 degrees is 0 N·m, which is beneficial for the outer cover 4 to instantaneously open, enabling the air compression mechanism to rapidly and instantaneously compress air and improving the air compression effect.

[0153] When the outer cover 4 rotates to 62.5 degrees, the arc surface 1703 at the tip of the convex rod 1704 of the airbag pressing member 17 is at the critical point between the first curved surface section 1211 and the second curved surface section 1212. When the outer cover 4 continues to rotate from 62.5 degrees to 150 degrees, the drive cam 12 rotates from 75 degrees to 180 degrees. The arc surface 1703 of the convex rod 1704 of the airbag pressing member 17 abuts from one end of the second curved surface section 1212 close to the first curved surface section 1211 to one end of the second curved surface section 1212 far from the first curved surface section 1211. Since the second curved surface section 1212 is an arc surface and the second curved surface section 1212 is concentric with the outer peripheral side surface of the main body portion 1200 and the pitch circle of the gear 1203, during the process of the outer cover 4 rotating from 62.5 degrees to 150 degrees, the convex rod 1704 of the airbag pressing member 17 still remains at the sixth position, that is, at 3.5 mm, and the convex rod 1704 of the airbag pressing member 17 does not move.

[0154] See Figures 1 to 11, a stop groove 1213 is provided at one end of the second curved surface section 1212 of the driving cam 12 away from the first curved surface section 1211. After the outer cover 4 is opened to the in-place position, the tip of the convex rod 1704 of the airbag pressing member 17 is located in the stop groove 1213, and the gravity of the airbag pressing member 17 acts on the driving cam 12, so that the tip of the convex rod 1704 of the airbag pressing member 17 limits the driving cam 12, preventing the driving cam 12 from rotating reversely under the action of the return torsion spring 15 (such as Fig.17A ) after the user releases the hand after the outer cover is opened to the in-place position, resulting in the problem that the outer cover automatically closes after being opened to the in-place position. In a specific embodiment, the stop groove 1213 is an arc-shaped groove, and the bottom surface of the stop groove 1213 is arc-shaped, so as to facilitate better cooperation between the tip of the convex rod 1704 and the stop groove 1213.

[0155] (2) Powder delivery mechanism

[0156] Refer to FIG. 12A to FIG. 14B , the powder delivery mechanism includes a powder container 7 and a powder metering wheel 9, and the powder metering wheel 9 of the powder delivery mechanism is rotatably connected to the powder container 7. Specifically, the powder container 7 has a storage cavity 715, an inhalation channel 706, and a first cylindrical groove 716. The powder metering wheel 9 is installed in the first cylindrical groove 716, and the powder metering wheel 9 can rotate back and forth between a third position and a fourth position. When in the third position, the dosing cup 902 of the powder metering wheel 9 is in the powder filling position, and when in the fourth position, the dosing cup 902 of the powder metering wheel 9 is in the powder inhalation position, that is, the position corresponding to the inhalation channel 706. It should be noted that the powder metering wheel 9 of the present application rotates back and forth between the third position and the fourth position, and its back-and-forth rotation path is along the minor arc, that is, the rotation direction of the powder metering wheel 9 from the third position to the fourth position is opposite to the rotation direction from the fourth position to the third position, and it does not rotate one full circle along the inner circumference of the first cylindrical groove 716 to achieve the back-and-forth rotation between the third position and the fourth position. By rotating the powder metering wheel 9 back and forth between the third position and the fourth position along the minor arc, the movement path of the powder metering wheel 9 can be made the shortest, and it can move along the optimal path, so as to more effectively avoid the waste and loss of the medicinal powder in the dosing cup 902 during the movement of the powder metering wheel 9.

[0157] The powder metering wheel 9 includes a dosing cup 902. When the powder metering wheel 9 is configured in the third position, the dosing cup 902 is correspondingly arranged with the powder outlet 713 of the storage chamber 715 for receiving the powder from the powder container 7. When the powder metering wheel 9 is configured in the fourth position, the dosing cup 902 is correspondingly arranged with the inlet 704 of the inhalation channel 706. Specifically, during the process of the airbag pressing member 17 moving from the fifth position to the sixth position, the powder metering wheel 9 is in the third position. The airbag pressing member 17 acts on the air compression airbag 18 under the drive of the elastic member 19, and compacts and fills the powder in the storage chamber 715 into the dosing cup 902 of the powder metering wheel 9.

[0158] See Fig.13A , 14A and 14B. Specifically, the powder metering wheel 9 is installed in the first cylindrical groove 716. The powder metering wheel 9 has an outer arc surface 901, and the outer arc surface 901 of the powder metering wheel 9 is fitted with the inner arc surface 705 of the first cylindrical groove 716 of the powder container 7. Among them, the outer arc surface 901 of the powder metering wheel 9 is an arc toroidal surface covering the reciprocating stroke, and the radian corresponding to the arc of the outer arc surface 901 is greater than or equal to 140 degrees and less than or equal to 170 degrees. Preferably, the radian corresponding to the arc of the outer arc surface 901 is about 150°.

[0159] See Fig.13A and Fig. 14B , there is a cylinder 703 in the first cylindrical groove 716 of the powder container 7. The cylinder 703 is defined as the second cylinder. The powder metering wheel 9 has a central hole 906, and the central hole 906 is defined as the second central hole. The first end of the powder metering wheel 9 has a top - tight spring arm 909, and the top - tight spring arm 909 is defined as the first top - tight spring arm. The top - tight spring arm 909 is arranged around the central hole 906. The top - tight spring arm 909 of the powder metering wheel 9 is cooperatively arranged with the cylinder 703 in the first cylindrical groove 716 of the powder container 7. Specifically, the cylinder 703 in the first cylindrical groove 716 is assembled into the central hole 906, the top - tight spring arm 909 abuts against the cylinder 703 in the first cylindrical groove 716, and the inner diameter formed by the top - tight spring arm 909 is smaller than the outer diameter of the cylinder 703. Thus, during assembly, the top - tight spring arm 909 undergoes elastic deformation, and the elastic deformation of the top - tight spring arm 909 of the powder metering wheel 9 provides a pressing force for the inner arc surface 705 of the first cylindrical groove 716 to fit with the outer arc surface 901 of the powder metering wheel 9, improving the sealing reliability and enabling the powder metering wheel 9 to be more tightly assembled in the first cylindrical groove 716 of the powder container 7, facilitating the achievement of a good assembly connection between the powder metering wheel 9 and the powder container 7.

[0160] A dose cup 902 is provided on the outer side surface of the powder metering wheel 9. Specifically, the dose cup 902 is provided on the outer arc surface 901 of the powder metering wheel 9, and the dose cup 902 is used to hold powder. In a preferred embodiment, only one dose cup 902 is provided on the outer arc surface 901 of the powder metering wheel 9. Only by the reciprocating rotation of the powder metering wheel 9 between the third position and the fourth position, a dose cup 902 is driven to reciprocate between the inlet 704 position of the inhalation channel 706 and the powder outlet 713 position to achieve the filling and delivery of the powder, thereby facilitating the user's suction.

[0161] It can be understood that the amount of powder contained in one dose cup 902 is fixed, and the amount of powder entering the inhalation channel 706 during the user's suction is fixed, avoiding the possibility of excessive powder such as medicinal powder when multiple dose cups 902 are circumferentially spaced on the outer side surface of the cylindrical metering component and allowing multiple doses to be continuously dispensed into the inhalation channel 706 when the metering component rotates. Or, when a series of dose grooves or one dose groove is provided on the surface of the flat metering component and the powder is delivered by a translational movement, the position state of the inhalation and the open position state of the outer cover 4 are inconsistent, resulting in the user inhaling multiple doses of powder in one inhalation, and thus the problem of excessive powder inhalation by the user occurs. That is, only one dose cup 902 is provided on the outer arc surface 901 of the powder metering wheel 9, and the amount of powder inhaled by the user at the outlet 102 position of the mouthpiece 101 at one time is fixed, and there is no possibility of inhaling multiple doses of powder, which can accurately control the powder inhalation amount and simplify the structure.

[0162] In other embodiments, one dose cup 902 provided on the outer arc surface 901 of the powder metering wheel 9 may also include multiple sub-dose cups. That is, at one position, one dose cup 902 can be partitioned into multiple spaced-apart sub-dose cups. For example, one or more partitions can be provided in the dose cup 902 to partition one dose cup 902 into multiple sub-dose cups; or, in other embodiments, multiple dose cups 902 can also be spaced on the outer arc surface 901 of the powder metering wheel 9, as long as it is ensured that at a fixed position, the powder holding capacity in the dose cup 902 is fixed to facilitate accurate control of the powder amount inhaled by the user.

[0163] See Fig.14A, in one embodiment, a first powder scraping groove 903 is further provided on the outer arc surface 901 of the powder metering wheel 9. The first powder scraping groove 903 is a notch provided on the outer arc surface 901. Specifically, the first powder scraping groove 903 is arranged obliquely to the circumferential direction of the powder metering wheel 9. The first powder scraping groove 903 is used to scrape off and discharge the fine medicinal powder adhering to the inner arc surface 705 of the powder container 7, so as to prevent the fine medicinal powder on the inner arc surface 705 of the powder container 7 from blocking the movement of the powder metering wheel 9 and improve the movement smoothness of the powder metering wheel 9 in the first cylindrical groove 716 of the powder container 7. Preferably, the depth of the first powder scraping groove 903 is 0.2 mm - 0.4 mm.

[0164] In one embodiment, a second powder scraping groove 904 is further provided on the outer arc surface 901 of the powder metering wheel 9. The depth of the second powder scraping groove 904 is greater than that of the first powder scraping groove 903. Preferably, the depth of the second powder scraping groove 904 is 0.7 mm - 0.9 mm. The second powder scraping groove 904 is used to scrape off and discharge the large particle medicinal powder adhering to the inner arc surface 705 of the powder container 7, so as to further improve the movement smoothness of the powder metering wheel 9 in the first cylindrical groove 716 of the powder container 7. In some embodiments, the width of the second powder scraping groove 904 can also be greater than that of the first powder scraping groove 903. Wherein, along the direction in which the powder metering wheel 9 turns from the third position to the fourth position, the second powder scraping groove 904 is arranged on the side of the first powder scraping groove 903 away from the dosing cup 902, which is convenient for scraping off and discharging the large particle medicinal powder adhering to the inner arc surface 705 of the powder container 7 by the second powder scraping groove 904 during the process of the powder metering wheel 9 turning from the third position to the fourth position, that is, during the medicine delivery stroke of the powder metering wheel 9, reducing the movement resistance of the large particle medicinal powder to the powder metering wheel 9, and then scraping off and discharging the remaining fine medicinal powder adhering to the inner arc surface 705 of the powder container 7 by the first powder scraping groove 903, so as to better ensure the movement smoothness of the powder metering wheel 9 in the first cylindrical groove 716 of the powder container 7. The sizes of the first powder scraping groove 903 and the second powder scraping groove 904 are different. During the medicine delivery stroke and the reset stroke of the powder metering wheel 9, that is, during the process of the powder metering wheel 9 turning back from the fourth position to the third position, the first powder scraping groove 903 and the second powder scraping groove 904 can clean the medicinal powder on the inner arc surface 705 of the powder container 7 multiple times and in multiple gradients, which can further improve the accuracy of the medicine delivery dose.

[0165] In one embodiment, the end face of the first end of the powder metering wheel 9 has a first rib 908. The first rib 908 prevents friction between the plane and adjacent parts, and improves the smoothness of the reciprocating movement of the powder metering wheel 9 through the contact friction of the rib.

[0166] In one embodiment, the end face of the second end of the powder metering wheel 9 has a second rib 907. The second rib 907 prevents friction between the plane and adjacent parts, and improves the smoothness of the reciprocating movement of the powder metering wheel 9 through the contact friction of the rib.

[0167] In one embodiment, the end face of the first end of the powder metering wheel 9 has a first rib 908, and the second end has a second rib 907.

[0168] In one embodiment, referring to Fig. 14B , the first end of the powder metering wheel 9 further has a groove 911 and a driving spring arm 910. The groove 911 is arranged around the central hole 906. One end of the driving spring arm 910 is connected to the side wall of the groove 911, and the other end is a free end. The driving spring arm 910 and the pressing spring arm 909 are arranged at intervals. One end of the wedge-shaped column 1005 of the dose protection plate 10 extends into the groove 911. The driving spring arm 910 is used to abut against the wedge-shaped column 1005 of the dose protection plate 10 to drive the dose protection plate 10 to rotate and reset; arranging the groove 911 can also reduce the weight of the powder metering wheel 9, making it easier to drive the powder metering wheel 9 to rotate. The specific manner and process of the driving spring arm 910 driving the dose protection plate 10 to rotate and reset will be described in detail in the subsequent process of the outer cover 4 closing the cover to trigger the function mechanism to reset, and will not be elaborated here.

[0169] Referring to Fig. 10B and Fig.14A , the surface of the body part 1200 of the driving cam 12 facing away from the gear 1203 further has an annular boss 1207. The annular boss 1207 is coaxially arranged with the gear 1203 and is used to drive the powder metering wheel 9 to rotate. Specifically, the second end of the powder metering wheel 9 has a boss 905, which is defined as the first boss. The boss 905 of the powder metering wheel 9 is used to cooperate with the annular boss 1207 of the driving cam 12 to achieve rotational drive. Specifically, the two annular bosses 1207 are centrosymmetrically arranged with the center of the central hole 1204 as the center, and the two bosses 905 are centrosymmetrically arranged with the center of the central hole 906 as the center.

[0170] In a preferred embodiment, during the process of opening the cover, the angle of the outer cover 4 at the second position is 150 degrees. During the process of the outer cover 4 rotating from the first position (i.e., 0 degree) to the second position, wherein, during the process of the outer cover 4 rotating from 0 degree to 62.5 degrees (i.e., the outer cover 4 rotates by 62.5 degrees), the outer cover 4 drives the drive gear 5 to rotate, and further drives the drive cam 12 to rotate from 0 degree to 75 degrees (i.e., the drive cam 12 rotates by 75 degrees). During this process, the powder metering wheel 9 is in a static state, and the boss 905 of the powder metering wheel 9 does not contact the annular boss 1207 of the drive cam 12, and the powder metering wheel 9 does not rotate at the third position; during the process of the outer cover 4 rotating from 62.5 degrees to 150 degrees (i.e., the outer cover 4 rotates by 87.5 degrees), the outer cover 4 drives the drive gear 5 to rotate, and further drives the drive cam 12 to rotate from 75 degrees to 180 degrees (i.e., the drive cam 12 rotates by 105 degrees). During this process, the boss 905 of the powder metering wheel 9 is in contact with the annular boss 1207 of the drive cam 12. The annular boss 1207 of the drive cam 12 cooperates with the boss 905 of the powder metering wheel 9 to drive the powder metering wheel 9 to rotate from the third position to the fourth position. The powder metering wheel 9 rotates by 105 degrees during this process, that is, when the dosing cup 902 of the powder metering wheel 9 rotates from the position of the powder outlet 713 to the inlet 704 of the inhalation channel 706, the rotation angle of the powder metering wheel 9 is 105 degrees.

[0171] During the process of the outer cover 4 rotating from 62.5 degrees to 150 degrees, the drive cam 12 rotates from 75 degrees to 180 degrees, driving the powder metering wheel 9 to rotate from the third position to the fourth position, that is, the dosing cup 902 of the powder metering wheel 9 rotates from the position of the powder outlet 713 of the powder container 7 to the inlet 704 of the inhalation channel 706. During this process, the powder delivery mechanism realizes the powder delivery process. During the process of opening the cover of the outer cover 4, a second cover opening load stroke is performed within this rotation range, which requires a relatively large torque. The torque of the outer cover 4 is constant during the second cover opening load stroke. Preferably, the torque of the outer cover 4 during the second cover opening load stroke is 0.1 N·m, ensuring that the outer cover 4 opens smoothly and evenly without sudden torque until the cover is opened completely, thereby ensuring the powder delivery effect and avoiding powder leakage or waste due to flying.

[0172] The outer cover 4 is linked and cooperated with the powder metering wheel 9 and the air compression mechanism respectively. When the outer cover 4 is configured at the first position, the airbag pressing member 17 is limited at the fifth position. During the process of the outer cover 4 rotating from the first position to the second position, the limitation on the airbag pressing member 17 is first released, so that the elastic member 19 drives the airbag pressing member 17 to move from the fifth position to the sixth position, and then drives the powder metering wheel 9 to rotate from the third position to the fourth position. During the process of the outer cover 4 reversing and resetting from the second position to the first position, it drives the powder metering wheel 9 to reverse and reset from the fourth position to the third position, and drives the airbag pressing member 17 to move reversely and reset from the sixth position to the fifth position.

[0173] After the powder delivery mechanism completes the powder delivery process, the outer cover 4 rotates to the second position, and the dose cup 902 of the powder metering wheel 9 of the powder delivery mechanism is at a position corresponding to the inlet 704 of the inhalation channel 706. The outer cover 4 is fully opened to expose the outlet 102 of the mouthpiece 101, and the user can suck at the position of the outlet 102 of the mouthpiece 101, which is convenient for triggering the inhalation trigger mechanism to achieve the inhalation trigger function.

[0174] See FIG. 15A to FIG. 23B , Fig.15A is Figure 1 a schematic structural diagram of the inhalation trigger device of the provided powder inhaler when in a state on the powder container, Fig. 15B is Fig.15A a schematic structural diagram of the inhalation trigger device provided when in another state on the powder container, Fig.16A is Fig.15A a schematic structural diagram of the inhalation trigger device provided after removing the powder container, Fig. 16B is Fig. 15B a schematic structural diagram of the inhalation trigger device provided after removing the powder container, Fig.17A is Fig.16A a schematic structural diagram of the inhalation trigger device provided from another angle, Fig. 17B is Fig. 16B a schematic structural diagram of the inhalation trigger device provided from another angle, Fig.18A is Figure 1 a schematic exploded view of the counting mechanism of the provided powder inhaler, Fig.18B is Fig.18A a schematic assembled view of the counting mechanism, Fig. 20 is Figure 1 a schematic structural diagram of the dose protection plate of the inhalation trigger device of the provided powder inhaler, Fig.21A is Figure 1 a schematic sectional assembled view of the powder metering wheel and the dose protection plate of the provided powder inhaler when in a state, Fig.21B is Figure 1 a schematic sectional assembled view of the powder metering wheel and the dose protection plate of the provided powder inhaler when in another state, Fig. 21C is Fig.21A a partial enlarged view of Fig.21D is Fig.21B a partial enlarged view of Fig.21E is Figure 1 a schematic sectional assembled view of the powder metering wheel and the dose protection plate of the provided powder inhaler when in yet another state, Fig.21F is Fig.21E a partial enlarged view of Fig.22A is Figure 1Schematic structural diagram of the air intake baffle of the inhalation trigger device of the provided powder inhaler at an angle Fig. 22B is Fig.22A Schematic structural diagram of the air intake baffle at another angle provided Fig. 22C is Fig.22A Schematic structural diagram of the air intake baffle at yet another angle provided Fig.23A is Figure 1 Schematic structural diagram of the front housing of the provided powder inhaler at an angle Fig. 23B is Figure 1 Schematic structural diagram of the front housing of the provided powder inhaler at another angle

[0175] (3) Inhalation trigger mechanism

[0176] See FIG. 15A to FIG. 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 is linked and cooperated with the dose protection plate 10. The powder inhaler further includes a return torsion spring 15 and a driving torsion spring 16. The air intake baffle 11 and the dose protection plate 10 of the inhalation trigger mechanism, in combination with the return torsion spring 15, the driving torsion spring 16, and the powder container 7, the powder metering wheel 9, and the driving cam 12, jointly realize the inhalation trigger function

[0177] See Fig.13A and 13B , the powder container 7 further has an air flow channel 708 communicating with the inhalation channel 706, and the inhalation channel 706 needs to communicate with the outside atmosphere through the air flow channel 708. See FIG. 13A to FIG. 17B , when the inhalation trigger mechanism is in the initial state, the air intake baffle 11 blocks the air flow channel 708, the air flow channel 708 is not communicated with the outside atmosphere, and the shielding portion 1004 of the dose protection plate 10 shields 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 communicate with the outside atmosphere through the air flow channel 708. When the negative pressure inside the inhalation channel 706 is greater than the threshold value, that is, when the user's inhalation flow rate is higher than the working threshold value, the inhalation trigger mechanism is triggered to act. Specifically, the air intake baffle 11 rotates and opens the air flow channel 708, the air flow channel 708 is communicated with the outside atmosphere, the inhalation channel 706 is communicated with the outside atmosphere through the air flow channel 708, the air intake baffle 11 triggers the dose protection plate 10 to rotate, so that the shielding portion 1004 of the dose protection plate 10 deviates and does not shield the powder outlet of the dose cup 902, and the powder outlet of the dose cup 902 is exposed at the position of the inlet 704 of the inhalation channel 706. Among them, the working threshold value can be in the range of 15 L / min to 35 L / min. Preferably, the working threshold value for triggering the inhalation trigger mechanism to act is in the range of 20 L / min - 25 L / min

[0178] It can be understood that an inhalation trigger mechanism is provided in the powder inhaler. Only when the inhalation flow rate of the user is higher than the working threshold, the intake baffle 11 will rotate and open the air flow channel 708, so that the inhalation channel 706 is communicated with the outside atmosphere through the air flow channel 708, and the rotation of the intake baffle 11 will trigger the rotation of the dose protection plate 10 so as not to block the powder outlet of the dose cup 902, so that the powder outlet of the dose cup 902 is communicated with the inhalation channel 706, and the powder in the dose cup 902 is exposed, carried out and depolymerized by the air flow in the inhalation channel 706. At this time, the air flow rate is relatively high and the depolymerization effect is good, realizing the flow rate threshold control of powder release, improving the depolymerization effect of powder release, and avoiding powder waste.

[0179] See Fig. 13B 、 FIG. 15A to FIG. 22C , there is an installation hole 707 on the side wall of the intake port of the air flow channel 708. The intake baffle 11 is rotatably installed on the installation hole 707, and the side wall of the air flow channel 708 surrounds the intake baffle 11.

[0180] Specifically, the intake baffle 11 includes a baffle body 1110, and the baffle body 1110 is rotatably connected to the side wall of the air flow channel 708. In one embodiment, the intake baffle 11 further includes a rotating shaft 1106. The rotating shaft 1106 is disposed at the first end of the baffle body 1110, and the rotating shaft 1106 passes through the installation hole 707 on the side wall of the port of the air flow channel 708 and is rotatably connected to the installation hole 707.

[0181] See Figure 9G 、 Figure 9H 、 FIG. 13A to FIG. 22C , the first surface of the baffle body 1110 has a convex platform 1101. The first surface is the surface of the baffle body 1110 facing outside the port of the air flow channel 708. The convex platform 1101 is defined as the second convex platform, and the convex platform 1101 is used to increase the complexity of the side flow channel. Specifically, a convex platform 1101 protruding from the outer surface of the baffle body 1110 is provided on the baffle body 1110, so that the side flow channel changes from a direct flow channel to an "L"-shaped flow channel, thereby increasing the flow resistance of the air flow and realizing a lower trigger flow rate under the condition of the same windward area, making it easier to realize the inhalation trigger function and facilitating the use of the powder inhalation device by users with weak bodies. The "L"-shaped flow channel means that the flow channel includes a bent first flow channel section and a second flow channel section, and the included angle between the first flow channel section and the second flow channel section can be 80-100 degrees, such as 90 degrees, which will be introduced in detail later.

[0182] The outer surface of the baffle body 1110 of the present application is defined as the outer surface facing the outside of the port of the air flow channel 708 with respect to the port of the air flow channel 708. The boss 1101 can be directly protruded from the outer surface of the baffle body 1110. For example, the baffle body 1110 is a solid structure; the boss 1101 can also be formed by recessing the baffle body 1110, that is, the boss 1101 is formed by bending a part of the baffle body 1110 towards the outside of the port facing the air flow channel 708, so that the baffle body 1110 is only a frame, which can reduce the weight of the intake baffle 11. The boss 1101 can be integrally formed with the baffle body 1110, or the boss 1101 can be directly connected and fixed on the outer surface of the baffle body 1110.

[0183] In one embodiment, the boss 1101 covers the central region of the surface of the baffle body 1110 outside the port facing the air flow channel 708. The projection of the boss 1101 on the baffle body 1110 is similar to the shape of the baffle body 1110, and the projection of the boss 1101 on the baffle body 1110 covers more than 60% of the area of the baffle body 1110, so as to further increase the flow resistance of the side flow channel, ensure the consistency of the suction resistance at each stage during the drug administration process of the powder inhaler, improve the drug administration effect of the powder inhaler, and further improve the user compliance, so that the user has a better user experience. The area of the projection of the boss 1101 on the baffle body 1110 covering the baffle body 1110 is related to the width of the annular surface 1109 and can be designed as required.

[0184] In other embodiments, the boss 1101 covers other regions of the surface of the baffle body 1110 outside the port facing the air flow channel 708. The boss 1101 can also be set to other shapes, and the ratio of the projected area of the boss 1101 on the baffle body 1110 to the area of the baffle body 1110 can also be set to other values, as long as the boss 1101 can increase the complexity of the side flow channel and enhance the flow resistance of the air flow.

[0185] In one embodiment, along the direction from the first end of the baffle body 1110 to the opposite second end (the direction away from the rotating shaft 1106), the height of the boss 1101 gradually decreases, so that the top surface of the boss 1101 forms an inclined surface, and the inclined surface has a certain guiding effect on guiding the air flow direction, so as to more conveniently realize the inhalation trigger function.

[0186] Specifically, refer to Figure 9G 、 Figure 9H 、 Figure 15A 、 Figure 15B and Figures 22A to 23B, the front housing 1 has a suction nozzle 101 which is arranged corresponding to the suction channel 706 and communicates with the suction channel 706. An air inlet 104 and a grille 103 are provided on the side wall of the front housing 1. The grille protrudes from the outer wall surface of the front housing 1. The air inlet 104 communicates the outside atmosphere with the space inside the housing assembly. In a specific embodiment, the grille 103 is located above the suction nozzle 101 and adjacent to the air inlet 104. The grille 103 protrudes from the outer wall surface of the front housing 1, which can prevent the lips from contacting the air inlet 104 and blocking the air inlet 104 when the user sucks the powder from the suction nozzle 101, resulting in problems such as poor air intake or the outside atmosphere being unable to enter the housing assembly through the air inlet 109. As Figure 23B shown, in a preferred embodiment, three air inlets 104 and two grilles 103 are provided on the side wall of the front housing 1, and the grilles 103 and the air inlets 104 are arranged alternately. In other embodiments, the air inlets 104 and the grilles 103 can be arranged at other positions, and they can also be set to any other number.

[0187] As Figure 22C shown, along the circumferential direction of the boss 1101, the outer peripheral side surface of the boss 1101 and the outer peripheral side surface of the baffle body 1110 are evenly spaced. The part of the surface of the baffle body 1110 facing outside the port of the air flow channel 708 that is not covered by the boss 1101 forms an annular surface 1109. Both the annular surface 1109 and the outer peripheral side surface of the boss 1101 are used to cooperate with the front housing 1 of the powder inhaler to form an L-shaped air inlet flow channel. Specifically, as Figure 23A and Figure 23B shown, an annular flange 111 is provided on the inner wall surface of the front housing 1. The annular flange 111 surrounds the air inlet 104. Specifically, the annular flange 111 surrounds three air inlets 104 and two grilles 103. Refer to Figures 9C to 9H, one end of the annular flange 111 is disposed within the air flow channel 708, and the side wall of the front housing 1 seals the port of the air flow channel 708. When the inhalation trigger mechanism is in the initial state, a first flow channel section is formed by the inner peripheral side surface of the annular flange 111 of the front housing 1 and the outer peripheral side surface of the boss 1101 of the intake baffle 11 being spaced apart and cooperating with each other. The end surface of the annular flange 111 away from the front housing 1 abuts against the annular surface 1109 of the intake baffle 11 and cooperates to form a second flow channel section. The first flow channel section and the second flow channel section communicate with each other to form an L-shaped intake air flow channel Q1. That is, before the inhalation trigger mechanism is triggered, the outside air enters the internal space of the housing assembly through the air inlet 104 on the front housing 1. Through the L-shaped intake air flow channel Q1 formed by the cooperation of the baffle body 1110, the boss 1101 of the intake baffle 11 and the annular flange 111 of the front housing 1, the outside air can enter the powder inhaler, ensuring the consistency of the suction resistance at each stage during the drug administration process of the powder inhaler, avoiding the too large suction resistance inside the powder inhaler before inhalation trigger from affecting the air compression process or the powder delivery process, and improving the drug administration effect of the powder inhaler.

[0188] When the user inhales at the mouthpiece 101 and the negative pressure inside the inhalation channel 706 is greater than the threshold value, that is, when the air flow velocity during the user's inhalation is greater than the working threshold value, the internal negative pressure will push the intake baffle 11 to rotate and open the air flow channel 708, and the air flow channel 708 communicates with the outside air through the air inlet 104.

[0189] As Figure 9G and Figure 9H shown, the distance between the top surface of the boss 1101 of the intake baffle 11 and the surface of the baffle body 1110 facing outside the port of the air flow channel 708 is the first distance L1, that is, the height of the boss 1101 is L1, and the thickness of the annular flange 111 on the inner wall surface of the front housing 1 is the second distance L2. The ratio between the first distance L1 and the second distance L2 is 1:2 - 7:1. Preferably, the first distance L1 is greater than the second distance L2, and the ratio between the first distance L1 and the second distance L2 is 1:1 - 5:1. Setting the ratio between the first distance L1 and the second distance L2 within the above range can increase the pressure difference between the inner side and the outer side of the intake baffle 11, that is, increase the pressure difference between the side of the intake baffle 11 close to the air flow channel 708 and the side of the intake baffle 11 close to the air inlet 104 of the front housing 1, and increase other resistances. The increase in the pressure difference on both sides of the intake baffle 11 is more conducive to pushing the intake baffle 11 to rotate to open the air flow channel 708, thus making it more convenient to achieve the inhalation trigger function.

[0190] In one embodiment, the intake baffle 11 further includes a rotating member 1108. The rotating shaft 1106 is disposed at one end of the baffle body 1110. The rotating member 1108 is connected to the free end of the rotating shaft 1106 and is spaced apart from the baffle body 1110. The first end of the rotating member 1108 has a curved surface that faces the outside of the port of the air flow channel 708 (specifically, the line connecting the two ends of the curved surface is substantially parallel to the baffle body 1110). Specifically, the curved surface can be an arc surface, and the curved surface is used to guide the air flow so that the air flow path lengths on both sides of the baffle body 1110 are the same.

[0191] Specifically, refer to Figure 9C , Figure 13A , Figure 13B , Figure 15A and Figure 15B , the side wall of the air flow channel 708 of the powder container 7 is connected to the side wall of the storage chamber 715. The side wall of the air flow channel 708 connected to the side wall of the storage chamber 715 is provided with spaced-apart first diversion holes 710 and second diversion holes 717 at one end. The end of the suction channel 706 close to the nozzle 101 has spaced-apart first air inlets 718 and second air inlets 719. The first diversion hole 710 communicates the air flow channel 708 and the first air inlet 718, and the second diversion hole 717 communicates the air flow channel 708 and the second air inlet 719. The inner wall surface of the front housing 1 and the outer wall surface of the suction channel 706 are spaced apart to form a diversion channel 720 (as shown in Figure 9C ), and the diversion channel 720 communicates the air flow channel 708 with the first air inlet 718 and the second air inlet 719. Refer to Figure 15B, when the flow rate of the user's inhalation airflow is greater than the working threshold and the negative pressure inside the inhalation channel 706 is greater than the threshold, the intake baffle 11 rotates and opens the airflow channel 708. The air inlet 104 on the front housing 1 penetrates through the first diversion hole 710 and the second diversion hole 717 through the airflow channel 708. After the outside air enters the inside of the housing assembly through the air inlet 104 of the front housing 1, a part of the gas flows through the airflow channel 708 to the first diversion hole 710, a part of the gas flows through the airflow channel 708 to the second diversion hole 717, and the remaining gas flows through the airflow channel 708 to the diversion channel 720. Among them, the gas flowing out of the first diversion hole 710 flows along the outer side of the side wall of the airflow channel 708 to the second curved surface 1104 and finally flows to the first airflow inlet 718, and the gas flowing out of the second diversion hole 717 flows along the outer side of the side wall of the airflow channel 708 to the first curved surface 1103 and finally flows to the second airflow inlet 719. The gas flowing out of the diversion channel 720 can enter the first airflow inlet 718 and the second airflow inlet 719 at the same time, facilitating the inhalation of powder through the inhalation channel 706. It can be understood that by setting the air inlet 104 of the front housing 1 to three, and respectively setting the first diversion hole 710, the second diversion hole 717 and the diversion channel 720, the ventilation cross-sections of the three-way airflows can be made consistent with the ventilation cross-sectional area of the three air inlets 104 of the front housing 1, avoiding gas loss during intake; at the same time, both the first curved surface 1103 and the second curved surface 1104 are arc-shaped surfaces, which can guide the airflow direction and make the lengths of the airflow paths on both sides of the baffle body 1110 the same.

[0192] In one embodiment, as Figure 13B and Figure 15B shown, there are two oppositely arranged arc-shaped ribs inside the inhalation channel 706. The two arc-shaped ribs and the side wall of the inhalation channel 706 enclose a vortex-shaped air passage. After the gas enters the inside of the inhalation channel 706 through the first airflow inlet 718 and the second airflow inlet 719 respectively, a vortex is formed. The vortex carries the powder in the dose cup 902 at the inlet 704 of the inhalation channel 706 into the inhalation channel 706, and after being depolymerized in the inhalation channel 706, it finally flows to the mouthpiece 101 and is inhaled by the user. The above setting is more conducive to the depolymerization of powders such as medicine powder in the inhalation channel 706, avoiding waste of medicine powder and improving the utilization rate of medicine powder.

[0193] See Figures 22A to 22C, a raised cylinder 1102 is provided on the surface of the second end of the rotating member 1108 away from the baffle body 1110. The cylinder 1102 is defined as the third cylinder, and the cylinder 1102 is used to abut against the driving arm of the return torsion spring 15 of the powder inhaler, so that the baffle body 1110 fits against the front housing 1. Specifically, in one embodiment, the number of the rotating shafts 1106 is two, and the two rotating shafts 1106 are respectively arranged on opposite sides of the baffle body 1110, and the two rotating shafts 1106 are respectively defined as the first rotating shaft 1106a and the second rotating shaft 1106b. The number of the rotating members 1108 is two, and the two rotating members 1108 are respectively defined as the first rotating member 1108a and the second rotating member 1108b. The first rotating member 1108a is connected to the free end of the first rotating shaft 1106a. The first end of the first rotating member 1108a has a first curved surface 1103, and the surface of the second end away from the baffle body 1110 has a raised cylinder 1102. The second rotating member 1108b is connected to the free end of the second rotating shaft 1106b. The first end of the second rotating member 1108b has a second curved surface 1104, and the second end has an arc groove surface 1107.

[0194] In one embodiment, the side surface of the baffle body 1110 further has a shoulder 1105 surrounding the rotating shaft 1106. The shoulder 1105 is spaced from the rotating member 1108. The shoulder 1105 is used to keep the gaps between both sides of the baffle body 1110 and the side walls of the air flow channel 708 uniform, so as to more stably realize the inhalation triggering function.

[0195] See Figure 13A and Figure 13B 、 Figures 15A to 22C , the powder container 7 further has a second cylindrical groove 712. The second cylindrical groove 712 is coaxially and oppositely arranged with the first cylindrical groove 716 and has a common bottom wall (not labeled in the figure). The counting mechanism and the dose protection plate 10 are installed in the second cylindrical groove 712. See Figures 15A to 19B , the counting mechanism includes a counter base 21. The counter base 21 has a cylindrical shaft 2111. Both the dose protection plate 10 and the counter base 21 of the counting mechanism are installed in the second cylindrical groove 712 on the powder container 7. The counter base 21 axially limits the dose protection plate 10. The powder inhaler further includes a driving torsion spring 16 and a return torsion spring 15. The driving torsion spring 16 is sleeved on the cylindrical shaft 2111 of the counter base 21. A limiting groove 2109 is provided on the counter base 21. The fixed arm of the driving torsion spring 16 is fixed through the limiting groove 2109 on the counter base 21. The return torsion spring 15 is installed on the gear bracket 14.

[0196] See Figures 15A to 20, the dose protection plate 10 includes an annular body 1000, a shielding portion 1004, and a pressing member 1006. The pressing member 1006 of the dose protection plate 10 is disposed on the outer side surface of the annular body 1000. The shielding portion 1004 is connected to one end of the annular body 1000 and is spaced apart from the pressing member 1006. The shielding portion 1004 is used to shield or not shield the dose cup 902. The annular body 1000 is disposed in the second cylindrical groove 712 of the powder container 7, as Figure 18B shown. The annular body 1000 is used to accommodate the counting mechanism. The side wall of the second cylindrical groove 712 of the powder container 7 has a notch. The pressing member 1006 extends out of the second cylindrical groove 712 through the notch on the side wall of the second cylindrical groove 712 and can rotate back and forth within the notch. As Figure 20 shown, the surface of the pressing member 1006 away from the annular body 1000 includes a pressing arc surface 1002. When the inhalation trigger mechanism is in the initial state, that is, before being triggered or after the inhalation trigger mechanism is reset, the arc groove surface 1107 of the rotating member 1108 of the intake baffle 11 cooperates with the pressing arc surface 1002 of the dose protection plate 10 to achieve concentric arc surface pressing.

[0197] The shielding portion 1004 is connected to one end of the annular body 1000 and is used to shield or not shield the dose cup 902. As Figure 13B shown, an arc-shaped notch (not labeled in the figure) is provided on the common bottom wall of the powder container 7, so that the shielding portion 1004 of the dose protection plate 10 passes through the arc-shaped notch and enters the first cylindrical groove 716, and can rotate back and forth within the arc-shaped notch, so as to be located at the entrance 704 of the inhalation channel 706 and shield the dose cup 902 at this position before the inhalation trigger mechanism is triggered, and after the inhalation trigger mechanism is triggered, rotate within the arc-shaped notch to deviate from the entrance 704 of the inhalation channel 706 to not shield the dose cup 902, so that the powder in the dose cup 902 is exposed for easy inhalation by the user.

[0198] Specifically, referring to Figures 15A to 17B 、 Figure 20 , the pressing member 1006 includes a cylindrical convex surface 1001. The cylindrical convex surface 1001 is disposed on one side of the pressing arc surface 1002. As Figure 16A and Figure 16B shown, the driving arm of the driving torsion spring 16 of the powder inhaler acts on the cylindrical convex surface 1001. So that when the user's inhalation flow rate is higher than the working threshold and the intake baffle 11 rotates, after the pressing arc surface 1002 of the dose protection plate 10 is separated from the arc groove surface 1107 of the intake baffle 11, the dose protection plate 10 rotates under the action of the driving arm of the driving torsion spring 16, so that the shielding portion 1004 of the dose protection plate 10 changes from shielding the dose cup 902 of the powder metering wheel 9 to not shielding, so that the powder in the dose cup 902 of the powder metering wheel 9 is exposed to the air flow for the user to suck.

[0199] The movement mode of the inhalation trigger mechanism during the inhalation trigger process will be specifically introduced below.

[0200] Refer to Figure 9D and Figures 15A to 22C . Before the outer cover 4 is opened to the in-place position, as Figure 15A and Figure 16A and Figure 17A and Figure 22A shown, the driving arm of the return torsion spring 15 acts on the cylinder 1102 of the intake baffle 11. The driving arm of the return torsion spring 15 presses against the intake baffle 11 to fit the front housing 1, the boss 1101 is embedded in the annular flange 111, the intake baffle 11 does not rotate, and the inhalation channel 706 cannot communicate with the outside atmosphere through the air flow channel 708. As Figure 20 and Figure 15A shown, the driving arm of the driving torsion spring 16 acts on the cylindrical convex surface 1001 of the pressing member 1006 of the dose protection plate 10. At this time, the pressing arc surface 1002 of the pressing member 1006 of the dose protection plate 10 acts on the arc groove surface 1107 of the rotating member 1108 of the intake baffle 11 (as Figure 16A ), achieving concentric arc surface pressing.

[0201] The guiding groove 1209 of the driving cam 12 is located on the surface of the body portion 1200 facing the gear 1203, and the surface of the body portion 1200 facing away from the gear 1203 has a rib 1208. When the outer cover 4 is opened to the in-place position, that is, when the outer cover 4 rotates to the second position, the rib 1208 of the driving cam 12 presses the driving arm of the return torsion spring 15 away from the cylinder 1102 of the intake baffle 11 (as Figure 17B ), and the rib 1208 releases the limit of the return torsion spring 15 on the intake baffle 11 of the inhalation trigger mechanism. At this time, the intake baffle 11 is not affected by the pressing force of the return torsion spring 15, and only the pressing friction force of the pressing arc surface 1002 of the dose protection plate 10 on the arc groove surface 1107 of the intake baffle 11 remains. At the same time, after the outer cover 4 rotates to the second position, the dose cup 902 of the powder metering wheel 9 is delivered to the position of the inlet 704 of the inhalation channel 706, and the shielding portion 1004 of the dose protection plate 10 is located at the position of the inlet 704 of the inhalation channel 706 and shields the powder outlet of the dose cup 902.

[0202] After the outer cover 4 is opened in place and before the inhalation trigger mechanism is triggered, only the pressing friction force of the pressing arc surface 1002 of the dose protection plate 10 on the arc groove surface 1107 of the intake baffle 11 remains for the intake baffle 11, and the intake baffle 11 still does not rotate. When the user inhales and the flow rate of the user's inhalation air flow is greater than the working threshold, and the negative pressure in the inhalation channel 706 is greater than the threshold, the air flow thrust generated by the inhalation air flow acts on the intake baffle 11, overcoming the friction force of the pressing arc surface 1002 acting on the arc groove surface 1107, and the inhalation trigger mechanism is triggered, causing the intake baffle 11 to deflect and rotate. After the intake baffle 11 rotates, the arc groove surface 1107 of the intake baffle 11 rotates synchronously, and the pressing arc surface 1002 of the dose protection plate 10 disengages from the arc groove surface 1107 of the intake baffle 11 (as shown in Figure 16B ). The dose protection plate 10 rotates under the driving force of the driving torsion spring 16, and the shielding portion 1004 of the dose protection plate 10 rotates synchronously within the arc-shaped notch, causing the shielding portion 1004 of the dose protection plate 10 to deviate and not shield the powder outlet of the dose cup 902. At this time, the powder outlet of the dose cup 902 of the powder metering wheel 9 is exposed in the inhalation channel 706, and under the action of the user's inhalation air flow, the powder in the dose cup 902 flows through the inhalation channel 706 and the nozzle 101 and is inhaled by the user. In a preferred embodiment, the dose protection plate 10 rotates downward by 38 degrees under the driving force of the driving torsion spring 16, so that the powder outlet of the dose cup 902 communicates with the inhalation channel 706, and the powder in the dose cup 902 is exposed to the air flow and carried away.

[0203] See Figure 14B and Figure 20 , the dose protection plate 10 further includes a wedge-shaped column 1005. One end of the wedge-shaped column 1005 is connected to the annular body 1000 and is spaced from both the shielding portion 1004 and the pressing member 1006. The other end of the wedge-shaped column 1005 is used to cooperate with the driving spring arm 910 of the powder metering wheel 9, so that during the closing process of the outer cover 4, the driving spring arm 910 drives the dose protection plate 10 to rotate and reset through the wedge-shaped column 1005. The specific process and method of the driving spring arm 910 driving the dose protection plate 10 to rotate and reset through the wedge-shaped column 1005 will be described in detail in the subsequent process of the closing trigger function mechanism of the outer cover 4 resetting, and will not be elaborated here.

[0204] See Figure 20 , the dose protection plate 10 further includes a spring arm hook 1003. One end of the spring arm hook 1003 is connected to the annular body 1000. Specifically, one end of the spring arm hook 1003 is connected to the inner wall surface of the annular body 1000, and the other end of the spring arm hook 1003 is used to drive the counting mechanism to count. The counting mechanism and the method and process of the spring arm hook 1003 driving the counting mechanism to count will be specifically introduced below.

[0205] Refer to Figures 24A to 25 ,Figure 24A is Figure 18A Schematic structural diagram of the units digit wheel of the provided counting mechanism at an angle Figure 24B is Figure 24A Schematic structural diagram of the units digit wheel at another angle provided Figure 25 is Figure 18A Schematic structural diagram of the tens digit wheel of the provided counting mechanism

[0206] (4) Counting mechanism

[0207] See Figure 18A and Figure 18B and Figures 22A to 25 The counting mechanism includes a counter base 21, a tens digit wheel 22, a units digit wheel 23, and a counter intermediate gear 24. The counting mechanism realizes the counting function under the cooperation of the dose protection plate 10 and the powder container 7. Specifically, the tens digit wheel 22 is installed on the counter base 21. The counter base 21 has a cylindrical surface 2101, a spring buckle 2102, and an outer arc convex platform 2108. The tens digit wheel 22 has an inner ring 2203 and an inner arc convex platform 2205. The cylindrical surface 2101 of the counter base 21 cooperates with the inner ring 2203 of the tens digit wheel 22 to achieve coaxial rotation. The spring buckle 2102 on the counter base 21 axially limits the tens digit wheel 22. The outer arc convex platform 2108 of the counter base 21 cooperates with the inner arc convex platform 2205 of the tens digit wheel 22 to achieve rotational limit of the tens digit wheel 22

[0208] See Figure 4 and Figure 25 A digital display window 201 is provided on the housing assembly. Specifically, the digital display window 201 is provided on the rear housing 2 of the housing assembly. The tens digit wheel 22 also has a full - red warning feature 2201. When the full - red warning feature 2201 of the tens digit wheel 22 is displayed in the digital display window 201 on the rear housing 2, the tens digit wheel 22 is limited and stops rotating

[0209] A first mounting hole 2103 is also provided on the counter base 21. The counter intermediate gear 24 is mounted on the first mounting hole 2103 on the counter base 21. The counter intermediate gear 24 is in mesh with the gear feature of the tens digit wheel 22 through its gear feature to achieve transmission

[0210] The units digit wheel 23 has a second mounting hole 2303 and a toothed dial post 2301. A buckle post 2105 is provided on the counter base 21. The second mounting hole 2303 on the units digit wheel 23 cooperates with the buckle post 2105 on the counter base 21 to achieve coaxial mounting and axial limit. The units digit wheel 23 has an annular guiding structure 2305 for mating installation with the tens digit wheel 22. The outer peripheral side of the units digit wheel 23 is printed with a first digit 2302, and the outer peripheral side of the tens digit wheel 22 is printed with a second digit 2202 for easy counting. The toothed dial post 2301 on the units digit wheel 23 cooperates with the counter intermediate gear 24. When the units digit wheel 23 rotates one full circle and jumps from the digit "0" to the digit "9", the toothed dial post 2301 of the units digit wheel 23 drives the counter intermediate gear 24 to rotate two teeth. At the same time, the tens digit wheel 22 meshes with the counter intermediate gear 24, and the tens digit wheel 22 synchronously rotates two teeth to achieve a digit jump.

[0211] See Figures 16A to 20 , the driving of the units digit wheel 23 is achieved by the reciprocating motion of the dose protection plate 10. Specifically, as Figure 24A shown, the units digit wheel 23 is provided with ratchet teeth 2304. See Figure 20 , the dose protection plate 10 has a spring arm claw 1003. One end of the spring arm claw 1003 is connected to the annular body 1000. The ratchet teeth 2304 on the units digit wheel 23 cooperate with the spring arm claw 1003 of the dose protection plate 10. Before the inhalation trigger mechanism is triggered, the spring arm claw 1003 hooks one of the ratchet teeth 2304 on the units digit wheel 23; when the inhalation trigger mechanism triggers the movement, the intake baffle 11 rotates and then triggers the dose protection plate 10 to rotate under the action of the driving arm of the driving torsion spring 16. The rotation of the dose protection plate 10 causes the spring arm claw 1003 to rotate synchronously. After the spring arm claw 1003 rotates, it hooks the next ratchet tooth 2304 on the units digit wheel 23; during the process of closing the outer cover 4, the inhalation trigger mechanism resets, and the dose protection plate 10 rotates in the reverse direction and returns to the original state before the inhalation trigger mechanism is not triggered. Since the spring arm claw 1003 of the dose protection plate 10 hooks the next ratchet tooth 2304 on the units digit wheel 23, during this process, the dose protection plate 10 rotates in the reverse direction and hooks the ratchet tooth 2304 also rotates, and the units digit wheel 23 rotates under the action of the spring arm claw 1003 to achieve a digit jump.

[0212] In a preferred embodiment, the units digit wheel 23 is provided with ten ratchet teeth 2304. When the inhalation trigger mechanism triggers the movement, it triggers the dose protection plate 10 to rotate 38 degrees, and the spring arm claw 1003 hooks the next ratchet tooth 2304. When the inhalation trigger mechanism resets, the dose protection plate 10 rotates back 38 degrees, and the units digit wheel 23 rotates 36 degrees under the action of the spring arm claw 1003 to achieve a digit jump.

[0213] Furthermore, a limiting spring arm 711 is also provided on the powder container 7. Specifically, as Figure 13B shown, the side surface of the second cylindrical groove 712 of the powder container 7 has the limiting spring arm 711, and the limiting spring arm 711 is used to limit the one-way rotation of the counting mechanism. The limiting spring arm 711 provided on the powder container 7 cooperates with the ratchet teeth 2304 on the units digit wheel 23 to realize the one-way rotation of the units digit wheel 23. That is, when the dosage protection plate 10 rotates downward, the spring arm claw 1003 on the dosage protection plate 10 scratches the units digit wheel 23. Due to the action of the limiting spring arm 711 on the ratchet teeth 2304 of the units digit wheel 23, the units digit wheel 23 will not rotate along with the dosage protection plate 10. When the dosage protection plate 10 returns and rotates, the spring arm claw 1003 on the dosage protection plate 10 hooks and pulls the units digit wheel 23 to rotate 36° to realize one-way decreasing counting. Through the above settings, it can effectively prevent the problem that when the dosage protection plate 10 rotates downward, the spring arm claw 1003 drives the units digit wheel 23 and causes the counter to malfunction.

[0214] For the convenience of understanding, the cooperation relationship of each functional mechanism will be introduced below in combination with the process of closing the cover, as well as how to trigger the counting mechanism to count and how to realize the reset of each functional mechanism during the process of closing the cover.

[0215] During the process of closing the outer cover 4, that is, during the process of the outer cover 4 reversing from the second position back to the first position, it drives the powder delivery mechanism and the air pressure mechanism to reset respectively, and triggers the intake baffle 11 to reverse and reset, so that the powder inhaler returns to its original state; among them, the reset of the dosage protection plate 10 drives the counter to realize the counting of one digit.

[0216] 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 an embodiment, the angle of the outer cover 4 in the second position is 150 degrees. During the process of closing the outer cover 4 (the process of the outer cover 4 returning from the second position to the first position), that is, during the process of the outer cover 4 reversing from 150 degrees to 0 degrees, first there is a reverse idle stroke. The outer cover 4 drives the drive cam 12 to also reverse an idle stroke. Preferably, the outer cover 4 first reverses an idle stroke of 62.5 degrees, and the corresponding drive cam 12 reverses an idle stroke of 75 degrees. That is, when the closing idle stroke of the outer cover 4 ends, the angle of the outer cover 4 is 87.5 degrees, and the angle of the drive cam 12 is 105 degrees. When the outer cover 4 reverses from 87.5 degrees to 0 degrees, the drive cam 12 drives the powder metering wheel 9 to rotate and reset. The powder metering wheel 9 rotates and resets from the fourth position to the third position. The dosing cup 902 of the powder metering wheel 9 rotates from the position corresponding to the inlet 704 of the inhalation channel 706 to the position corresponding to the powder outlet 713 of the powder container 7, thereby realizing the reset of the powder delivery mechanism. During this process, the drive cam 12 reverses from 105 degrees to 0 degrees. When the outer cover 4 returns to the first position, that is, after the closing of the cover is completed, the arc-shaped rib 405 on the outer cover 4 cooperates with the sound-making spring arm 108 on the front housing 1 to realize a sound prompt for the cover to be closed in place, so as to prompt that the outer cover 4 is closed in place.

[0217] Since the outer cover 4 and the drive gear 5 are driven by gear meshing, there is a gear clearance, resulting in that the outer cover 4 cannot be closely attached to the front housing 1 after being closed. In order to eliminate the problem that the outer cover 4 cannot be closed with the front housing 1 due to the influence of the gear clearance after the outer cover 4 is closed, as Figure 8A and Figure 8B shown, a tightening spring arm 502 is provided on the drive gear 5. The tightening spring arm 502 is defined as the second tightening spring arm. A limiting boss 106 is provided on the front housing 1. The tightening spring arm 502 and the limiting boss 106 on the front housing 1 cooperate to achieve tightening and closing, so that the outer cover 4 is closely attached to the front housing 1 to ensure that the cover is closed in place. At the same time, during the process of opening the outer cover 4, that is, during the process of the outer cover 4 rotating from the first position to the second position, initially it is an opening idle stroke. The outer cover 4 needs to overcome the resistance of the limiting boss 106 to the tightening spring arm 502 when rotating, so that the tightening spring arm 502 can cross the limiting boss 106 to facilitate the rotation of the outer cover 4, which can prevent accidental opening of the cover due to non-human factors.

[0218] Further, referring to Figure 5A 、 Figure 6A and Figure 7A and Figure 7B, a limiting groove 403 is further provided on the connecting portion 406 with an arc-shaped rib 405 of the outer cover 4, and a limiting convex post 107 is further provided on the front housing 1. When the outer cover 4 is closed in place, that is, when the outer cover 4 is in the first position, the limiting convex post 107 is clamped in the limiting groove 403 to limit the outer cover 4 in the first position. Through the cooperation between the limiting groove 403 and the limiting convex post 107 of the front housing 1, the outer cover 4 and the front housing 1 are tightly closed, and a good fit is achieved between the outer cover 4 and the front housing 1, without gaps due to improper closing. At the same time, at the initial stage of the opening process of the outer cover 4, that is, within the opening idle stroke of the outer cover 4, it is also necessary to overcome the acting force of the limiting groove 403 on the limiting convex post 107 so that the limiting convex post 107 can be disengaged from the limiting groove 403 to facilitate the rotation of the outer cover 4, further preventing accidental opening due to non-human factors.

[0219] It can be understood that a limiting boss 106 and a tightening spring arm 502 are provided at the position corresponding to one of the connecting portions 406 of the outer cover 4, and a limiting groove 403 and a limiting convex post 107 are provided at the position corresponding to the other connecting portion 406. The closing of the outer cover 4 is limited on both opposite sides, so that when the outer cover 4 is in the first position, good fits can be achieved between both opposite sides of the outer cover 4 and the front housing 1, effectively avoiding problems such as the outer cover 4 not being closed in place, and there being a gap on one side while the other side is closed in place between the outer cover 4 and the front housing 1, ensuring the consistency of the closed state.

[0220] During the closing process of the outer cover 4, since the tip of the convex rod 1704 of the airbag pressing member 17 is limited in the stop groove 1213, it is first necessary to drive the tip of the convex rod 1704 of the airbag pressing member 17 to disengage from the stop groove 1213, that is, it is necessary to overcome the resistance of the stop groove 1213 to the tip of the convex rod 1704 of the airbag pressing member 17. During this process, the outer cover 4 undergoes a first closing sub-idle stroke, and the outer cover 4 reverses from 150 degrees to 140 degrees, requiring a relatively large torque. Preferably, within the first closing sub-idle stroke, the torque of the outer cover 4 is 0.05 N·m. Driving the cam 12 to rotate enables the tip of the convex rod 1704 of the airbag pressing member 17 to disengage from the stop groove 1213 and abut against the second curved surface section 1212, which can effectively prevent accidental closing due to non-human factors.

[0221] During the process of the outer cover 4 reversing from 140 degrees to 87.5 degrees, the outer cover 4 drives the drive cam 12 to reverse to 105 degrees. During this process, the annular boss 1207 of the drive cam 12 does not contact the boss 905 of the powder metering wheel 9, and the powder metering wheel 9 does not rotate. The outer cover 4 performs the second closing cover idle stroke. Only the second drive cam 12 is reversing and resetting. The tip of the convex rod 1704 of the airbag pressing part 17 abuts against the second curved surface section 1212. Since the second curved surface is an arc surface, the airbag pressing part 17 does not move during this process and remains in the sixth position. During this process, it is not necessary to drive the powder metering wheel 9 to rotate, nor is it necessary to drive the airbag pressing part 17 to reset. The torque required for the outer cover 4 during the second closing cover idle stroke is small and is a constant torque. Preferably, the torque of the outer cover 4 during the second closing cover idle stroke is 0 N·m, which accelerates the cover closing process and increases the smoothness of cover closing.

[0222] When the outer cover 4 reverses to 87.5 degrees, the annular boss 1207 of the drive cam 12 begins to contact the boss 905 of the powder metering wheel 9. During the process of the outer cover 4 reversing from 87.5 degrees to 62.5 degrees, it drives the drive cam 12 to reverse from 105 degrees to 75 degrees. During this process, the outer cover 4 performs the first closing cover load stroke. The annular boss 1207 of the drive cam 12 cooperates with the boss 905 of the powder metering wheel 9 and drives the powder metering wheel 9 to reverse. The powder metering wheel 9 begins to rotate from the fourth position to the third position. During this process, only the powder metering wheel 9 is resetting, and the tip of the convex rod 1704 of the airbag pressing part 17 still abuts against the second curved surface section 1212, and the airbag pressing part 17 remains in the sixth position. Since the outer cover 4 needs to drive the powder metering wheel 9 to reverse and reset during the first closing cover load stroke, a relatively large constant torque is required. Preferably, the torque of the outer cover 4 during the first closing cover load stroke is 0.1 N·m to ensure that the powder metering wheel 9 can be driven to reverse.

[0223] Furthermore, during the process of closing the cover of the outer cover 4, in a preferred embodiment, when the outer cover 4 reverses from 62.5 degrees to 0 degrees, the drive cam 12 reverses from 75 degrees to 0 degrees. Through the cooperation of the first curved surface section 1211 of the cam surface 1202 on the drive cam 12 and the arc surface 1703 of the airbag pressing part 17, when the drive cam 12 reverses, the first curved surface section 1211 of the cam surface 1202 continuously pushes up the airbag pressing part 17 until the arc surface 1703 of the airbag pressing part 17 falls into the arc-shaped groove 1201 of the drive cam 12, completing the reset of the air compression mechanism.

[0224] See Figures 21A to 21F, specifically, during the process of closing the outer cover 4, in a preferred embodiment, when the outer cover 4 rotates from 56 degrees to 25 degrees, the driving cam 12 rotates from 68 degrees to 30 degrees. During this process, the driving spring arm 910 on the powder metering wheel 9 cooperates with the wedge-shaped column 1005 of the dose protection plate 10 to drive the dose protection plate 10 to rotate and reset.

[0225] Specifically, during the process of the outer cover 4 rotating from 87.5 degrees to 56 degrees, refer to Figure 21A and Figure 21C , the driving spring arm 910 on the powder metering wheel 9 does not contact the wedge-shaped column 1005 of the dose protection plate 10. During this process, the dose protection plate 10 does not rotate. Refer to Figure 21B and Figure 21D , when the outer cover 4 rotates to 56 degrees, the driving spring arm 910 on the powder metering wheel 9 starts to contact the wedge-shaped column 1005 of the dose protection plate 10. During the process of the outer cover 4 rotating from 56 degrees to 25 degrees, the annular boss 1207 of the driving cam 12 contacts the boss 905 of the powder metering wheel 9. The reverse rotation of the driving cam 12 drives the reverse rotation of the powder metering wheel 9. Then, the force exerted by the driving spring arm 910 of the powder metering wheel 9 on the wedge-shaped column 1005 of the dose protection plate 10 drives the dose protection plate 10 to rotate 38 degrees in reverse, realizing the reset of the dose protection plate 10. During the process of the outer cover 4 rotating from 8 degrees to 0 degrees, the dose protection plate 10 has been reset and stops rotating. During this process, only the powder metering wheel 9 is still rotating in reverse. Refer to Figure 21E and Figure 21F , the driving spring arm 910 on the powder metering wheel 9 will pass over the wedge-shaped column 1005 of the dose protection plate 10. When the outer cover 4 rotates to 0 degrees, the powder metering wheel 9 is reset in place. The limit convex column 107 is clamped in the limit groove 403, and the pressing spring arm 502 acts on the limit boss 106 to ensure that the outer cover 4 is closed in place.

[0226] Before the outer cover 4 is fully closed, when the outer cover 4 is reversed by 12.5 degrees, at this time, the driving cam 12 is reversed by 15 degrees, and the rib 1208 on the driving cam 12 leaves the driving arm of the return torsion spring 15. The driving arm of the return torsion spring 15 acts on the cylinder 1102 on the intake baffle 11 again, providing a return force for the intake baffle 11. Under the action of the return pressing force of the return torsion spring 15 on the intake baffle 11, the intake baffle 11 is reversed to complete the reset, and the pressing arc surface 1002 of the dose protection plate 10 acts on the arc groove surface 1107 of the intake baffle 11 again to achieve concentric arc surface pressing, and the dose protection plate 10 of the inhalation trigger mechanism is reset. When the outer cover 4 is reversed from 8 degrees to 0 degrees, the driving spring arm 910 on the driving 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 lid load stroke, the driving powder metering wheel 9 continues to reverse, while the dose protection plate 10 has been reset and no longer reverses. 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 a force to the wedge-shaped column 1005. Under the action of the driving torsion spring 16, the pressing arc surface 1002 of the dose protection plate 10 will act on the arc groove surface 1107 of the intake baffle 11 again to achieve concentric arc surface pressing. Ensure that after the inhalation trigger mechanism is reset, the powder metering wheel 9 is reset to avoid the situation that the inhalation trigger mechanism is not reset in place.

[0227] During the process of the outer cover 4 being reversed from 62.5 degrees to 8 degrees, it is necessary to simultaneously perform the reverse reset of the driving powder metering wheel 9 and the upward reset process of the airbag pressing member 17. During this process, the outer cover 4 performs the second closing lid load stroke, which requires a relatively large torque, and the torque of the second closing lid load stroke gradually increases. Preferably, within the second closing lid load stroke, the torque of the outer cover 4 gradually increases from 0.10 N·m to 0.20 N·m to ensure that the driving powder metering wheel 9 and the airbag pressing member 17 can be continuously reset. When the outer cover 4 rotates to 8 degrees, the airbag pressing member 17 is reset, that is, the airbag pressing member 17 is reset to the fifth position, and the tip of the convex rod 1704 of the airbag pressing member 17 sinks into the arc-shaped groove 1201 again to limit the airbag pressing member 17. During the process of the outer cover 4 being reversed from 8 degrees to 0 degrees, the outer cover 4 performs the third closing lid load stroke. During this process, it is necessary to overcome the resistance of the driving powder metering wheel 9 passing over the wedge-shaped column 1005. Preferably, the torque of the outer cover 4 within the third closing lid load stroke is 0.1 N·m until the lid is fully closed.

[0228] Specifically, within the first lid loading stroke and the second lid loading stroke of the outer lid 4, the powder metering wheel 9 drives the dose protection plate 10 to reset beyond the inlet 704 of the inhalation channel 706, compressing the driving torsion spring 16. Meanwhile, the reset torsion spring 15 drives the intake baffle 11 to reset and rotate to close the air flow channel 708. During the third lid loading stroke of the outer lid 4, the powder metering wheel 9 is decoupled from the dose protection plate 10. Specifically, the driving spring arm 910 of the powder metering wheel 9 is decoupled from the wedge-shaped column 1005 of the dose protection plate 10. The driving torsion spring 16 drives the dose protection plate 10 to rotate such that the shielding portion 1004 of the dose protection plate 10 rotates to the inlet 704 of the inhalation channel 706 and is limited at the position of the inlet 704 of the inhalation channel 706 by the intake baffle 11.

[0229] See Figures 26 to 27 , Figure 26 is a cross-sectional schematic view of another embodiment of the powder inhaler provided by the present application, Figure 27 is a cross-sectional schematic view of yet another embodiment of the powder inhaler provided by the present application.

[0230] In Figure 1 the powder inhaler shown, a scheme of using a pneumatic mechanism and a large-sized powder outlet 713 is adopted for powder filling. In this embodiment, referring to Figure 9C and Figure 9D , the cross-sectional area of the powder outlet 713 of the powder container 7 is larger than the cross-sectional area of the dose cup 902 on the powder metering wheel 9. The powder outlet 713 of the powder container 7 has a larger size, which can more efficiently implement the pneumatic and powder filling processes. In other embodiments, it is also possible not to use the pneumatic method as shown in Figure 9C shown.

[0231] For example, as shown in Figure 26 , in another embodiment, the powder inhaler may not be provided with a pneumatic mechanism, and a large-sized powder outlet 713 is directly adopted, such that the cross-sectional area of the powder outlet 713 of the powder container 7 is larger than the cross-sectional area of the dose cup 902 on the powder metering wheel 9. Since in the powder inhaler provided by each embodiment of the present application, during the process of opening and closing the lid, the axis of the housing assembly is always parallel to the vertical direction, therefore, during the powder filling process, along the vertical direction, the powder outlet 713 at the bottom of the storage cavity 715 is always directly above the dose cup 902 of the powder metering wheel 9. By directly relying on the gravity of the powder in the storage cavity 715 of the powder container 7, the powder in the powder container 7 can also be filled into the dose cup 902 of the powder metering wheel 9 to achieve powder filling.

[0232] Or, as shown in Figure 27As shown, in another embodiment, a pneumatic mechanism may also be provided in the powder inhaler. However, the powder outlet 713 of the powder container 7 is set as a small-sized powder outlet 713. Specifically, the cross-sectional area of the powder outlet 713 of the powder container 7 is smaller than the cross-sectional area of the dose cup 902 on the powder metering wheel 9. The cross-sectional shape of the powder outlet 713 may be circular or other shapes, and the diameter of the powder outlet 713 is between 1 mm and 3 mm, so as to compact and fill the powder in the powder container 7 into the dose cup 902 on the powder metering wheel 9 through the pneumatic mechanism to achieve powder filling. The specific setting method of pneumatic and powder filling can be designed or selected according to needs, and the present application does not limit this.

[0233] The following describes the specific operating state of the powder inhaler during the entire process from opening the cover to closing the cover, that is, when the outer cover 4 rotates from the first position (0 degrees) to the second position (150 degrees), the user inhales, and then the outer cover 4 rotates from the second position (150 degrees) back to the first position (0 degrees).

[0234] (1) Opening the cover process

[0235] During the opening process of the outer cover 4, that is, during the process of the outer cover 4 rotating from the first position (0 degrees) to the second position (150 degrees), it sequentially includes an opening empty stroke, a pneumatic process, and a powder delivery process in chronological order.

[0236] (1) Opening empty stroke

[0237] During the opening empty stroke, the outer cover 4 rotates from 0 degrees to 12 degrees. Among them, the process of the outer cover 4 rotating from 0 degrees to 8 degrees is to prevent the outer cover 4 from being opened by non-human factors, and the process of the outer cover 4 rotating from 8 degrees to 12 degrees is to prevent accidental opening of the cover. When the outer cover 4 is in the first position, that is, 0 degrees, the outer cover 4 covers the mouthpiece 101.

[0238] (2) Pneumatic process

[0239] During the pneumatic process, the outer cover 4 rotates from 12 degrees to 62.5 degrees. Among them, during the process of the outer cover 4 rotating from 12 degrees to 55 degrees, the pneumatic function is realized, so that the powder in the storage chamber 715 of the powder container 7 is compacted and filled into the dose cup 902 of the powder metering wheel 9. When the outer cover 4 rotates to 55 degrees, the pressure relief hole 1702 and the ventilation hole 709 are at the connection critical point. During the process of the outer cover 4 rotating from 55 degrees to 62.5 degrees, the pressure relief hole 1702 and the ventilation hole 709 are connected to realize the pressure relief function, releasing the compressed gas in the storage chamber 715 of the powder container 7 to atmospheric pressure to prevent powder leakage when the powder metering wheel 9 rotates. During this process, the outer cover 4 can be instantaneously opened when opening the cover, so that the pneumatic mechanism can rapidly compress air to improve the pneumatic effect.

[0240] (3) Powder delivery process

[0241] During the powder delivery process, the outer cover 4 rotates from 62.5 degrees to 150 degrees. The rotation of the outer cover 4 drives the drive cam 12 to rotate. The annular boss 1207 of the drive cam 12 contacts and cooperates with the boss 905 of the powder metering wheel 9. The drive cam 12 rotates and drives the powder metering wheel 9 to rotate 105 degrees, so that the powder metering wheel 9 rotates from the third position to the fourth position. The dosing cup 902 of the powder metering wheel 9 rotates from corresponding to the powder outlet 713 of the storage cavity 715 of the powder container 7 to a position corresponding to the inlet 704 of the inhalation channel 706. When the outer cover 4 rotates to the second position, the arc-shaped rib 405 on the outer cover 4 cooperates with the sound-emitting spring arm 108 on the front housing 1 to achieve a sound prompt for the outer cover 4 to be opened in place, indicating that the outer cover 4 is opened in place.

[0242] (II) Inhalation trigger process

[0243] After the powder delivery process is completed, the dosing cup 902 of the powder metering wheel 9 is delivered to a position corresponding to the inlet 704 of the inhalation channel 706. The shielding portion 1004 of the dose protection plate 10 covers the dosing cup 902 of the powder metering wheel 9. The outer cover 4 is in the second position (150 degrees), and the outlet 102 of the mouthpiece 101 is exposed. When the user sucks at the position of the outlet 102 of the mouthpiece 101, when the flow rate of the user's inhalation airflow is greater than the working threshold (20 L / min - 25 L / min) and the negative pressure in the inhalation channel 706 is greater than the threshold, the inhalation trigger mechanism is triggered to act. The intake baffle 11 rotates, and the pressing arc surface 1002 of the dose protection plate 10 disengages from the arc groove surface 1107 of the intake baffle 11. The dose protection plate 10 rotates 38 degrees under the driving action of the driving torsion spring 16. The shielding portion 1004 of the dose protection plate 10 deviates and does not block the dosing cup 902 of the powder metering wheel 9. The dosing cup 902 is exposed at the inlet 704 of the inhalation channel 706. The dosing cup 902 communicates with the inhalation channel 706, and the powder in the dosing cup 902 is exposed to the user's inhalation airflow and is carried away, completing the inhalation trigger process.

[0244] (III) Closing the cover process

[0245] After the inhalation trigger process is completed, the closing the cover process is carried out. During the closing the cover process, the outer cover 4 reversely resets from the second position (150 degrees) to the first position (0 degrees), and the outer cover 4 drives the air compression mechanism, the powder metering wheel 9, the dose protection plate 10, and the intake baffle 11 to reset during the closing the cover process. Specifically, the closing the cover process includes an empty stroke of closing the cover and a reset process of the functional mechanism.

[0246] (1) Empty stroke of closing the cover

[0247] During the empty stroke of closing the cover, the outer cover 4 reverses from 150 degrees to 87.5 degrees (i.e., the outer cover 4 reverses by 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 cover closing. In the later stage of the empty stroke of closing the cover, the outer cover 4 rotates from 140 degrees to 87.5 degrees.

[0248] (2) Function mechanism reset process

[0249] During the function mechanism reset process, the outer cover 4 reverses from 87.5 degrees to 0 degrees. During this process, the powder metering wheel 9 continues to reverse, and the powder metering wheel 9 resets from the fourth position to the third position. Among them, during the process of the outer cover 4 reversing from 87.5 degrees to 62.5 degrees, only the powder metering wheel 9 is reversing; during the process of the outer cover 4 reversing from 62.5 degrees to 8 degrees, the powder metering wheel 9 is reversing, and at the same time, the airbag pressing part 17 continuously pushes up to reset the air compression mechanism; among them, during the process of the outer cover 4 reversing from 56 degrees to 25 degrees, the driving spring arm 910 on the powder metering wheel 9 cooperates with the wedge-shaped column 1005 of the dose protection plate 10 to drive the dose protection plate 10 to rotate and reset, and the pressing arc surface 1002 of the dose protection plate 10 acts on the arc groove surface 1107 of the air intake baffle 11 again to achieve concentric arc surface pressing, and the air intake trigger mechanism is reset; during the process of the outer cover 4 reversing from 8 degrees to 0 degrees, the air compression mechanism has been reset. At this time, the cover closing stroke overcomes the rotation resistance of the powder metering wheel 9. When the outer cover 4 is in the first position (0 degrees), the powder metering wheel 9 reset is completed. When the outer cover 4 returns to the first position, the arc-shaped rib 405 on the outer cover 4 cooperates with the sound spring arm 108 on the front housing 1 to achieve a sound prompt for the cover closing in place, indicating that the outer cover 4 is closed in place.

[0250] As can be seen from the above, the outer cover 4 has different functions at different positions during the cover opening and closing process, such as the empty stroke or driving different function mechanisms to operate. According to the different functions of the outer cover 4 at different positions during the cover opening and closing process, the torque of the outer cover 4 during different strokes of the cover opening and closing process is designed in this application, making the cover opening and closing process of the powder inhaler more suitable for the user's usage habits.

[0251] Refer to Figures 28 to 30B , Figure 28 is Figure 1 a cyclic schematic diagram of the cover opening and closing process of the powder inhaler provided, Figure 29A is Figure 1 a curve schematic diagram of the cover opening angle and torque of an embodiment of the cover opening process of the powder inhaler provided, Figure 29B is Figure 1 a curve schematic diagram of the cover closing angle and torque of an embodiment of the cover closing process of the powder inhaler provided, Figure 30A is Figure 1 a curve schematic diagram of the cover opening angle and torque of another embodiment of the cover opening process of the powder inhaler provided,Figure 30B is Figure 1 A schematic diagram of the curve of the closing angle and torque of another embodiment of the closing process of the provided powder inhaler.

[0252] (I) Opening process

[0253] Refer to Figure 28 and Figure 29A 、 Figure 29B In some embodiments, the stroke of the outer cover 4 rotating from the first position to the second position (i.e., the opening process) includes an opening idle stroke and an opening load stroke after the opening idle stroke. For example, the stroke of the outer cover 4 rotating from the first position to the second position only includes an opening idle stroke and an opening load stroke after the opening idle stroke.

[0254] During the opening idle stroke, the outer cover 4 does not trigger the action of the functional mechanism. During the opening load stroke, the outer cover 4 triggers the functional mechanism to deliver powder to the inhalation channel 706. Among them, the maximum torque of the outer cover 4 during the opening idle stroke is greater than the maximum torque during the opening load stroke, which can ensure preventing accidental opening due to non-human factors during the opening idle stroke. At the same time, it also ensures fast or stable operation at different stages during the opening load stroke. Preferably, the torque of the outer cover 4 during the opening idle stroke is greater than or equal to 0.05 N·m and less than or equal to 0.3 N·m, and the torque of the outer cover 4 during the opening load stroke is greater than or equal to 0 N·m and less than or equal to 0.15 N·m.

[0255] Define the angle of the outer cover 4 at the first position as 0 degrees, and the angle of the outer cover 4 at 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 at the second position is 150 degrees. The critical angle between the opening idle stroke and the opening load stroke is greater than or equal to 10 degrees and less than or equal to 15 degrees. In a preferred embodiment, the critical angle between the opening idle stroke and the opening load stroke is specifically 12 degrees. That is, the outer cover 4 is in the opening idle stroke from 0 degrees to 12 degrees, and the outer cover 4 is in the opening load stroke from 12 degrees to 150 degrees.

[0256] (1) Opening idle stroke

[0257] The opening idle stroke includes a first opening sub-idle stroke and a second opening sub-idle stroke after the first opening sub-idle stroke. The critical angle between the first opening sub-idle stroke and the second opening sub-idle stroke is greater than or equal to 6 degrees and less than or equal to 10 degrees. As Figure 25 shown, in a preferred embodiment, the critical angle between the first opening sub-idle stroke and the second opening sub-idle stroke is 8 degrees. That is, the outer cover 4 is in the first opening sub-idle stroke from 0 degrees to 8 degrees, and the outer cover 4 is in the second opening sub-idle stroke from 8 degrees to 12 degrees.

[0258] Among them, the torque of the outer cover 4 during the first lid-opening idle stroke is greater than or equal to 0.02 N·m and less than or equal to 0.08 N·m, and the torque of the outer cover 4 during the second lid-opening idle stroke is greater than or equal to 0.1 N·m and less than or equal to 0.2 N·m. Preferably, the torque of the outer cover 4 during the first lid-opening idle stroke is 0.05 N·m, that is, the initial torque set between 0 degrees and 8 degrees of the outer cover 4 is 0.05 N·m, which can effectively prevent non-human factors from opening. The torque of the outer cover 4 during the second lid-opening idle stroke is 0.15 N·m, that is, the torque set between 8 degrees and 12 degrees of the outer cover 4 is 0.15 N·m. A relatively large lid-opening resistance is set between 8 degrees and 12 degrees of the outer cover 4 to prevent accidental lid-opening.

[0259] (2) Lid-opening load stroke

[0260] The lid-opening load stroke includes the first lid-opening load stroke and the second lid-opening load stroke after the first lid-opening load stroke. The outer cover 4 triggers the air-pressing mechanism during the first lid-opening load stroke to press the powder from the storage cavity 715 into the dosing cup 902, and the outer cover 4 triggers the dosing cup 902 to deliver the powder to the inhalation channel 706 during the second lid-opening load stroke.

[0261] Among them, the critical angle between the first lid-opening load stroke and the second lid-opening load stroke is greater than or equal to 60 degrees and less than or equal to 65 degrees. In a preferred embodiment, the critical angle between the first lid-opening load stroke and the second lid-opening load stroke is 62.5 degrees. That is, the outer cover 4 is in the first lid-opening load stroke between 12 degrees and 62.5 degrees, and the outer cover 4 is in the second lid-opening load stroke between 62.5 degrees and 150 degrees.

[0262] Among them, the torque of the outer cover 4 during the first lid-opening load stroke is constant and greater than or equal to 0 N·m and less than or equal to 0.05 N·m. Preferably, the torque of the outer cover 4 during the first lid-opening load stroke is 0 N·m, that is, the torque set between 12 degrees and 62.5 degrees of the outer cover 4 is 0 N·m. During the air-pressing process in the first lid-opening load stroke, setting the torque within this angle range to 0 N·m can achieve instantaneous opening during lid-opening, enabling the air-pressing mechanism to rapidly press air and improving the air-pressing effect.

[0263] The torque of the outer cover 4 during the second lid-opening load stroke is constant, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m. Preferably, the torque of the outer cover 4 during the second lid-opening load stroke is 0.1 N·m, that is, the torque set between 62.5 degrees and 150 degrees of the outer cover 4 is 0.1 N·m. The outer cover 4 performs the powder delivery process during the second lid-opening load stroke. At this stage, the outer cover 4 needs to be opened smoothly and uniformly. Setting the torque value in the second lid-opening load stroke to a constant torque of 0.1·m, without sudden torque changes until the lid-opening is completed, ensures the powder delivery effect.

[0264] (2) Closing the cover process

[0265] See Figure 28 and Figure 29A 、 Figure 29B , in some embodiments, the stroke of the outer cover 4 rotating from the second position to the first position (i.e., the process of closing the cover) includes an empty stroke for closing the cover and a load stroke for closing the cover after the empty stroke for closing the cover. Among them, within the load stroke for closing the cover, the outer cover 4 triggers the reset of the functional mechanism.

[0266] Define the angle of the outer cover 4 in the first position as 0 degrees, and the angle of the outer cover 4 in the second position is greater than or equal to 120 degrees and less than or equal to 180 degrees. In a preferred embodiment, the angle of the outer cover 4 in the second position is 150 degrees. In some embodiments, the critical angle between the empty stroke for closing the cover and the load stroke for closing the cover is greater than or equal to 80 degrees and less than or equal to 95 degrees. Preferably, the critical angle between the empty stroke for closing the cover and the load stroke for closing the cover is 87.5 degrees. That is, the empty stroke for closing the cover of the outer cover 4 is between 150 degrees and 87.5 degrees, and the load stroke for closing the cover of the outer cover 4 is between 87.5 degrees and 0 degrees.

[0267] (1) Empty stroke for closing the cover

[0268] The maximum torque of the outer cover 4 within the empty stroke for closing the cover is greater than or equal to 0.03 N·m and less than or equal to 0.07 N·m. Preferably, the maximum torque of the outer cover 4 within the empty stroke for closing the cover can prevent the cover from being closed by non-human factors by mistake.

[0269] In some embodiments, the empty stroke for closing the cover includes a first sub-empty stroke for closing the cover and a second sub-empty stroke for closing the cover after the first sub-empty stroke for closing the cover. The critical angle between the first sub-empty stroke for closing the cover and the second sub-empty stroke for closing the cover is greater than or equal to 135 degrees and less than or equal to 145 degrees. Preferably, the critical angle between the first sub-empty stroke for closing the cover and the second sub-empty stroke for closing the cover is 140 degrees. That is, the first sub-empty stroke for closing the cover of the outer cover 4 is between 150 degrees and 140 degrees, and the second sub-empty stroke for closing the cover of the outer cover 4 is between 140 degrees and 87.5 degrees.

[0270] Among them, the torque of the outer cover 4 within the first sub-empty stroke for closing the cover is constant, which is greater than or equal to 0.03 N·m and less than or equal to 0.07 N·m. Preferably, the torque of the outer cover 4 within the first sub-empty stroke for closing the cover is 0.05 N·m, that is, the torque of the outer cover 4 between 150 degrees and 140 degrees is 0.05 N·m, which can prevent the cover from being closed by non-human factors by mistake.

[0271] The torque of the outer cover 4 within the second sub-empty stroke for closing the cover is constant, which is less than or equal to 0.02 N·m. Preferably, the torque of the outer cover 4 within the second sub-empty stroke for closing the cover is 0 N·m, which can accelerate the process of closing the cover and increase the smoothness of closing the cover.

[0272] (2) Closing lid load travel

[0273] The maximum torque of the outer lid 4 within the closing lid load travel is greater than 0.05 N·m and less than or equal to 0.3 N·m. Specifically, the closing lid load travel includes a first closing lid sub-load travel, a second closing lid sub-load travel, and a third closing lid sub-load travel arranged in chronological order. The outer lid 4 only triggers the powder metering wheel 9 to reset and rotate within the first closing lid sub-load travel. The outer lid 4 continues to trigger the powder metering wheel 9 to reset and rotate and triggers the air compression mechanism to complete reset within the second closing lid sub-load travel. The outer lid 4 only triggers the powder metering wheel 9 to reset and rotate within the third closing lid sub-load travel, and triggers the powder metering wheel 9 to reset and rotate to the first position. The outer lid 4 also triggers the dose protection plate 10 and the air intake baffle 11 to complete reset within the closing lid load travel.

[0274] The critical angle between the first closing lid sub-load travel and the second closing lid sub-load travel is greater than or equal to 60 degrees and less than or equal to 65 degrees. Preferably, the critical angle between the first closing lid sub-load travel and the second closing lid sub-load travel is 62.5 degrees. That is, the first closing lid sub-load travel of the outer lid 4 is between 87.5 degrees and 62.5 degrees. The critical angle between the second closing lid sub-load travel and the third closing lid sub-load travel is greater than or equal to 6 degrees and less than or equal to 10 degrees. Preferably, the critical angle between the second closing lid sub-load travel and the third closing lid sub-load travel is 8 degrees. That is, the second closing lid sub-load travel of the outer lid 4 is between 62.5 degrees and 8 degrees, and the third closing lid sub-load travel of the outer lid 4 is between 8 degrees and 0 degrees.

[0275] Among them, the torque of the outer lid 4 within the first closing lid sub-load travel is constant, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m. Preferably, the torque of the outer lid 4 within the first closing lid sub-load travel is 0.1 N·m. That is, the torque of the outer lid 4 between 87.5 degrees and 62.5 degrees is 0.1 N·m, and only the powder metering wheel 9 rotates within the first closing lid sub-load travel.

[0276] The torque of the outer lid 4 within the second closing lid sub-load travel gradually increases, and its maximum value is greater than or equal to 0.15 N·m and less than or equal to 0.3 N·m. Preferably, the torque of the outer lid 4 within the second closing lid sub-load travel gradually increases from 0.10 N·m to 0.20 N·m. That is, the torque of the outer lid 4 between 62.5 degrees and 8 degrees gradually increases from 0.10 N·m to 0.20 N·m. The powder metering wheel 9 still rotates within the second closing lid sub-load travel, and the airbag pressing part 17 is in the process of continuously resetting by jacking up.

[0277] The torque of the outer cover 4 is constant within the third closing lid loading stroke, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m. Preferably, the torque of the outer cover 4 within the third closing lid loading stroke is 0.1 N·m, that is, the torque of the outer cover 4 is 0.1 N·m between 8 degrees and 0 degrees. The airbag pressing member 17 has been reset within the third closing lid loading stroke. At this time, the lid closing stroke overcomes the rotational resistance of the powder metering wheel 9 until the lid closing is completed.

[0278] See Figure 30A and Figure 30B , in another embodiment, during the opening and closing processes of the outer cover 4 of the powder inhaler, it can also be set according to the corresponding relationship between the opening and closing lid angles and the torque as shown in Figure 30A and Figure 30B . In this embodiment, there is a ramp curve in the torque change during the opening and closing processes, and there are fewer torque mutations, which is more user-friendly.

[0279] Refer to Figures 31A to 31E , Figure 31A is Figure 1 a schematic bottom view of the powder inhaler provided at an angle, Figure 31B is Figure 31A a schematic view of the powder inhaler provided in a state placed on a horizontal plane, Figure 31C is Figure 31A a schematic view of the powder inhaler provided in a handheld state, Figure 31D is Figure 31A a schematic view of the powder inhaler provided after opening the lid in a handheld state, Figure 31E is Figure 31A a schematic view of the powder inhaler provided in a mouth-sucking state.

[0280] See Figure 1 , Figure 5A , Figure 5B , Figure 31A and Figure 31B , the outer cover 4 of the powder inhaler includes two connecting portions 406 oppositely arranged 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. The two connecting portions 406 are respectively rotatably connected to opposite sides of the bottom end of the housing assembly and protrude from the bottom end of the housing assembly. 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 plane. The three support points of the two connecting portions 406 and one free end 407 can achieve stable placement and prevent the powder inhaler from tipping over due to unstable placement.

[0281] The present invention can ensure that during the use and storage of the device, the powder container 7 is always above the powder metering wheel 9, preventing problems such as powder variation caused by excessive changes in the position state of the device leading to frequent movement of the powder in the powder container 7. For example, phenomena such as the active ingredient of the powder detaching from the carrier, the powder particles becoming smaller, and accumulation at the bottom of small particles are avoided, ensuring that the powder in the powder container 7 of the powder inhaler remains in a relatively stable state throughout its entire service life cycle.

[0282] For example, as Figure 31B shown, when the bottom end of the powder inhaler is placed on a horizontal plane, the inclination angle of the axis of the housing assembly relative to the vertical direction is greater than or equal to 0 degrees and less than or equal to 15 degrees. Preferably, when the bottom end of the powder inhaler is placed on a horizontal plane, the inclination angle of the axis of the housing assembly relative to the vertical direction is 6 degrees, which can further ensure that the change in the position state of the device is small, and ensure that the powder in the powder container 7 remains in a relatively stable state when the powder inhaler is placed on a horizontal plane (i.e., in the storage state).

[0283] For example, as Figure 31C and Figure 31D shown, during the process of holding the powder inhaler to open and close the lid, the device is in a vertical state, and the axis of the housing assembly of the powder inhaler is parallel to the vertical direction, which is more convenient for the process of opening and closing the lid, and also makes the change in the position state of the device small, ensuring that the powder in the powder container 7 remains in a relatively stable state during the process of opening and closing the lid.

[0284] For example, as Figure 31E shown, during the user's oral inhalation process, the inclination angle of the axis of the housing assembly of the powder inhaler relative to the vertical direction is greater than or equal to 0 degrees and less than or equal to 15 degrees. Preferably, during the user's oral inhalation process, the inclination angle of the axis of the housing assembly of the powder inhaler relative to the vertical direction is 15 degrees, which not only ensures that the change in the position state of the powder inhaler is small during the oral inhalation process and the powder in the powder container 7 remains in a relatively stable state, but also ensures the convenience of the user's suction at the outlet 102 of the mouthpiece 101.

[0285] The above are only embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A powder inhaler, characterized in that, include: Functional mechanisms, including suction channels; A suction nozzle, connected to the suction 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 to be in the first position, the outer cover covers the suction nozzle; when the outer cover is configured to be in the second position, the outer cover does not cover the suction nozzle; 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 load stroke after the open cover idle stroke; in the open cover idle stroke, the outer cover does not trigger the action of the functional mechanism; in the open cover load stroke, the outer cover triggers the functional mechanism to deliver powder to the inhalation channel; and / or 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.

2. The powder inhaler according to claim 1, characterized in that The lid opening idle stroke includes a first lid opening idle stroke and a second lid opening idle stroke after 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; 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.

3. The powder inhaler according to claim 1, characterized in that The cover opening load stroke includes a first cover opening load stroke and a second cover opening load stroke after the first cover opening load stroke; Wherein, 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.

4. The powder inhaler according to claim 1, characterized in that The cover closing idle stroke includes a first cover closing idle stroke and a second cover closing idle stroke after the first cover closing idle stroke; Wherein, the torque of the first closing cover idle stroke is greater than the second closing cover idle stroke; Preferably, the torque within the idle stroke of the first closing cover is constant or gradually increases.

5. The powder inhaler according to claim 1, characterized in that 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 which are arranged in chronological order; Wherein, the torque of the second cover load stroke is greater than the torque of the first cover load stroke and / or the third cover load stroke; 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; Preferably, the torque of the second closing cover load stroke and / or the first closing cover load stroke increases gradually.

6. The powder inhaler according to claim 1, characterized in that, The functional mechanism comprises: Air compression mechanism; A powder delivery mechanism, comprising a storage chamber and a dose cup; the storage chamber is used for storing powder, and the storage chamber has a powder outlet; the open cover loading stroke includes a first open cover loading stroke and a second open cover loading stroke after the first open cover loading stroke; the outer cover triggers the air pressure mechanism within the first open cover loading stroke to press the powder from the storage chamber into the dose cup; the outer cover drives the dose cup to deliver the powder to the inhalation channel within the second open cover loading stroke.

7. The powder inhaler according to claim 6, wherein the delivery mechanism includes 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 includes the dose cup; the outer cover triggers the air pressure mechanism to first press air into the powder container and then release the pressure of the powder container within the first open cover loading stroke; wherein, the powder metering wheel can rotate back and forth between a third position and a fourth position; when the powder metering wheel is configured at the third position, the dose cup is correspondingly arranged with the powder outlet of the storage chamber for receiving the powder from the powder container; when the powder metering wheel is configured at the fourth position, the dose cup is correspondingly arranged at the entrance of the inhalation channel; the outer cover drives the dose cup to rotate from the third position to the fourth position within the second open cover loading stroke.

8. The powder inhaler according to claim 7, characterized in that, The powder inhaler further includes: an inhalation trigger mechanism, including a dose protection plate, an air intake baffle which are in linkage cooperation, as well as a reset torsion spring and a driving torsion spring; the reset torsion spring limits the air intake baffle on the air flow channel; the dose protection plate is limited by the air intake baffle at the entrance of the inhalation channel and blocks the dose cup; wherein, the outer cover squeezes the reset torsion spring within the second open cover loading stroke to release the limitation of the reset torsion spring on the air intake baffle; when the negative pressure of the air flow channel is greater than a threshold value, the air intake baffle rotates under the action of the air flow to release the limitation on the dose protection plate, and the dose protection plate rotates and deviates under the action of the driving torsion spring and does not block the dose cup of the powder metering wheel.

9. The powder inhaler according to claim 1, characterized in that, The functional mechanism includes: an air pressure mechanism; a powder delivery mechanism, including a powder container and a powder metering wheel; the powder container has a storage chamber for storing powder; the powder metering wheel is rotatably connected to the powder container; wherein, the closing cover loading stroke includes a first closing cover loading stroke, a second closing cover loading stroke and a third closing cover loading stroke arranged in chronological order; the outer cover only triggers the reset rotation of the powder metering wheel within the first closing cover loading stroke; the outer cover continues to trigger the reset rotation of the powder metering wheel and triggers the air pressure mechanism to complete the reset within the second closing cover loading stroke; the outer cover only triggers the reset rotation of the powder metering wheel within the third closing cover loading stroke, and triggers the powder metering wheel to reset and rotate to the first position.

10. The powder inhaler according to claim 9, characterized in that, The powder inhaler further includes: The inhalation trigger mechanism comprises a dosage protection plate, an air intake baffle, a reset torsion spring and a driving torsion spring which are linked and matched; the reset torsion spring limits the air intake baffle to the air flow channel; the dosage protection plate is limited by the air intake baffle to the entrance of the inhalation channel and blocks the dosage cup of the powder metering wheel; Wherein, the outer cover squeezes the return torsion spring within the cover opening load stroke, thereby releasing the limit of the return torsion spring on the air intake baffle; When the negative pressure of the airflow channel is greater than a threshold value, the air inlet baffle rotates under the action of the airflow to open the airflow channel and releases the limit on the dose protection plate, and the dose protection plate rotates and deviates under the action of the driving torsion spring without covering the dose cup of the powder metering wheel; Furthermore, the outer cover also triggers the dose protection plate and the air intake baffle to reset within the cover closing load stroke.

11. The powder inhaler according to claim 10, characterized in that The outer cover drives the dose protection plate to return to a position beyond the entrance of the inhalation passage through the powder metering wheel within the first cover closing load stroke and the second cover closing load stroke, and compresses the driving torsion spring; at the same time, the return torsion spring drives the air intake baffle to return and rotate and close the airflow passage; When the outer cover is in the third cover load stroke, the powder metering wheel is decoupled from the dose protection plate, the drive torsion spring drives the dose protection plate to rotate to the entrance of the inhalation channel, and is limited by the air intake baffle at the entrance of the inhalation channel.

12. The powder inhaler according to any one of claims 1 to 11, characterized in that 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; Preferably, the angle of the outer cover when in the second position is 150 degrees; 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, The cover opening idle stroke includes a first cover opening idle stroke and a second cover opening idle stroke after the first cover 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 a 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 a 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, The cover opening load stroke includes a first cover opening load stroke and a second cover opening load stroke after 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 is constant within the first lid-opening load stroke, 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 is constant within the second lid-opening load stroke, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m; and / or, 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 0.05 N·m and less than or equal to 0.3 N·m; and / or, The lid-closing idle stroke includes a first lid-closing idle stroke and a second lid-closing idle stroke after the first lid-closing idle stroke; 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; and / or, the torque of the outer cover is constant within the first lid-closing idle stroke, 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 is constant within the second lid-closing idle stroke, which is less than or equal to 0.02 N·m; and / or, 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; the critical angle between the first lid-closing load stroke and the second lid-closing load stroke is greater than or equal to 60 degrees and less than or equal to 65 degrees; the critical angle between the second lid-closing load stroke and the third lid-closing 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 is constant within the first lid-closing load stroke, 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 gradually increases within the second lid-closing load stroke, 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 is constant within the third lid-closing load stroke, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m.

Images