Piercing mechanism, powder delivery mechanism and powder inhaler

Abstract

The invention provides a piercing mechanism, a powder delivery mechanism and a powder inhaler. The piercing mechanism comprises a mounting seat; the protection piece and the piercing piece are respectively arranged on the mounting seat and extend towards a first direction; and in the first direction, one end, deviating from the mounting seat, of the protection piece protrudes out of one end, deviating from the mounting seat, of the piercing piece. The piercing mechanism can reduce the risk that the piercing piece is damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of inhalation devices, and in particular to a piercing mechanism, a powder delivery mechanism and a powder inhaler. Background Art

[0002] A powder inhaler dispenses powdered pharmaceutical preparations by airflow inhalation to draw the powder from a powder capsule into a mouthpiece for the user to inhale.

[0003] Powder inhaler packages typically include a piercing mechanism and a powder delivery mechanism. The powder delivery mechanism is used to house or contain a powder capsule. The piercing mechanism is used to pierce the powder capsule to allow the powder inside to be discharged. However, the piercing member of existing piercing mechanisms can collide with the sidewall of the powder delivery mechanism during piercing, causing damage. This can directly affect the piercing function, resulting in malfunctions during piercing of the powder capsule and prevent proper powder discharge. Summary of the Invention

[0004] The piercing mechanism, powder delivery mechanism and powder inhaler provided in the present application are intended to solve the problem that the piercing member of the existing piercing mechanism may hit the side wall of the powder delivery mechanism and be damaged during the process of piercing the powder capsule, thereby directly affecting the piercing function, causing abnormalities when the powder capsule is pierced and the powder cannot be discharged normally.

[0005] In order to solve the above technical problems, a technical solution adopted in this application is: to provide a piercing mechanism, which includes a mounting seat; a protective member and a piercing member, which are respectively arranged on the mounting seat and both extend in a first direction; and along the first direction, the end of the protective member facing away from the mounting seat protrudes beyond the end of the piercing member facing away from the mounting seat.

[0006] In one embodiment of the present application, there are two protective members, which are arranged on two sides of the piercing member opposite to each other.

[0007] In one embodiment of the present application, the end of the piercing member facing away from the mounting seat forms an insertion end, and the insertion end has a first inclined surface. Along the first direction, the first inclined surface extends from the end of the insertion end close to the mounting seat to the end facing away from the mounting seat; and the inclination angle of the first inclined surface is 1°-60°.

[0008] In one embodiment of the present application, the insertion end further has a second inclined surface, the second inclined surface extends along the first direction to an end of the insertion end away from the mounting seat, and the second inclined surface intersects with the first inclined surface.

[0009] In one embodiment of the present application, the mounting seat has a mounting post, the mounting post has a mounting hole, and one end of the piercing member is inserted into and fixed in the mounting hole;

[0010] The piercing mechanism further includes: a second elastic member, which is sleeved on the outside of the piercing member, and one end of the second elastic member is sleeved and fixed on the outside of the mounting post, and the other end is used to abut against the housing assembly.

[0011] In order to solve the above technical problems, another technical solution adopted in this application is: to provide a powder delivery mechanism, which includes: an annular body, having a capsule cavity, and the capsule cavity is used to accommodate powder capsules; wherein, a puncture hole is opened on at least one side wall along the axial direction of the annular body, and the puncture member of the puncture mechanism is inserted into the capsule cavity through the puncture hole; along the circumferential direction of the annular body, an avoidance hole is opened on at least one side of the puncture hole, and the avoidance hole is used to avoid the protective member of the puncture mechanism.

[0012] In one embodiment of the present application, the capsule cavity is provided with a puncture hole on both side walls along the axial direction of the annular body; each puncture hole is provided with an avoidance hole on both sides along the circumferential direction of the annular body, and one avoidance hole is used to accommodate one protective member.

[0013] In one embodiment of the present application, the annular body has a plurality of capsule cavities, and the plurality of capsule cavities are arranged on the outer peripheral surface of the annular body at intervals along the circumferential direction of the annular body.

[0014] In order to solve the above technical problems, another technical solution adopted in the present application is: to provide a powder inhaler, which includes: a piercing mechanism, which is the piercing mechanism involved above; a powder delivery mechanism, which is the powder delivery mechanism involved above; wherein, when the protective member of the piercing mechanism is aligned with the avoidance hole of the powder delivery mechanism, the mounting seat of the piercing mechanism is pressed, and the piercing member of the piercing mechanism can be inserted into the capsule cavity to pierce the powder capsule in the capsule cavity; when the protective member is misaligned with the avoidance hole, the mounting seat is pressed, and the protective member abuts against the side wall of the avoidance hole, thereby limiting the abutment between the piercing member and the powder delivery mechanism.

[0015] In one embodiment of the present application, the extension length of the avoidance hole is not less than the length of the insertion end of the piercing member along the first direction.

[0016] In one embodiment of the present application, it further includes:

[0017] The powder delivery mechanism is detachably arranged in the shell component; a portion of the mounting seat is exposed from the shell component and serves as a button.

[0018] In one embodiment of the present application, it further includes:

[0019] a deaggregation mechanism having a deaggregation chamber, the deaggregation chamber being in communication with the capsule chamber of the powder delivery mechanism;

[0020] a suction nozzle, connected to the depolymerization chamber;

[0021] The cover body is rotatably connected to the shell assembly and cooperates with the piercing mechanism; the cover body can be configured to a first position to cover the suction nozzle; or configured to a second position to expose the suction nozzle and cooperate with the piercing member of the piercing mechanism to insert into the capsule cavity.

[0022] In one embodiment of the present application, the suction stroke of the powder inhaler includes a dosing stroke, a piercing stroke and a reset stroke; during the dosing stroke, the capsule cavity exposes the powder capsule therein; during the piercing stroke, the piercing member of the piercing mechanism is inserted into the capsule cavity and pierces the powder capsule; during the reset stroke, the piercing stroke is automatically reset.

[0023] The piercing mechanism provided in the embodiment of the present application is configured to pierce a powder capsule by providing a piercing member on a mounting seat, thereby allowing the powder in the powder capsule to be discharged smoothly. Furthermore, a protective member is provided on the mounting seat, with the end of the protective member facing away from the mounting seat protruding beyond the end of the piercing member facing away from the mounting seat. Thus, when the piercing mechanism is used to pierce the powder capsule, the protective member will contact the side wall of the powder delivery mechanism before the piercing member, thereby preventing the piercing member from being damaged by colliding with the side wall of the powder delivery mechanism, thereby affecting the piercing function of the piercing member and causing abnormalities when the powder capsule is pierced, and preventing the powder from being discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0025] Figure 1 A schematic structural diagram of a powder inhaler provided in one embodiment of the present application with the cover configured in a first position;

[0026] Figure 2 A schematic structural diagram of a powder inhaler provided in one embodiment of the present application with the cover configured in the second position;

[0027] Figure 3 and Figure 4, are two disassembly diagrams of the powder inhaler provided in the embodiments of the present application;

[0028] Figure 5 A partial schematic diagram of a powder inhaler provided in one embodiment of the present application;

[0029] Figure 6 Provided for an embodiment of this application Figure 2 AA sectional view of the powder inhaler shown;

[0030] Figure 7 A schematic diagram of the structure of a powder inhaler with the mouthpiece opened to expose the deaggregation chamber provided in one embodiment of the present application;

[0031] Figure 8 A disassembled schematic diagram of a powder delivery mechanism provided in one embodiment of the present application;

[0032] Figure 9 A schematic structural diagram of an annular body provided in one embodiment of the present application;

[0033] Figure 10a Provided for an embodiment of this application Figure 1 A BB sectional view of the powder inhaler shown;

[0034] Figure 10b Provided for an embodiment of this application Figure 1 EE sectional view of the powder inhaler shown;

[0035] Figure 11 A schematic diagram of the structure of the first sawtooth of the driven wheel meshing with the driving wheel provided in one embodiment of the present application;

[0036] Figure 12 A schematic diagram of the structure in which the last first serration of the driven wheel is engaged with the driving wheel according to an embodiment of the present application;

[0037] Figure 13 A schematic structural diagram of the powder inhaler with the second shell removed, when the cover provided in one embodiment of the present application is in the second position;

[0038] Figure 14 A cross-sectional view of a take-up wheel provided in one embodiment of the present application;

[0039] Figure 15 A disassembled schematic diagram of a take-up wheel provided in one embodiment of the present application;

[0040] Figure 16 for Figure 15 A schematic structural diagram of the rotating member in the take-up pulley shown;

[0041] Figure 17 A schematic structural diagram of a piercing mechanism provided in one embodiment of the present application;

[0042] Figure 18 Provided for an embodiment of this application Figure 2 A CC sectional view of the powder inhaler shown;

[0043] Figure 19 Provided for an embodiment of this application Figure 7 A sectional view of the powder inhaler shown in DD direction;

[0044] Figures 20 to 21 , which is a schematic diagram of the structure of the piercing member provided in this application from different perspectives.

[0045] Description of Reference Numerals

[0046] 1-housing assembly; 11-first housing; 111-window; 112-first engaging groove; 113-first retaining member; 114-sliding groove; 115-buckle; 12-second housing; 121-first rotating shaft; 122-first retaining rib; 123-support member; 124-protrusion; 125-second rotating shaft;

[0047] 2-depolymerization mechanism; 21-depolymerization chamber; 22-external air inlet; 23-internal air inlet; 24-annular convex rib;

[0048] 3- nozzle; 31- grid; 32- internal straight airway;

[0049] 4-cover; 41-first connecting arm; 411-slot; 42-second connecting arm; 421-rotation hole; 422-protrusion;

[0050] 5 - Powder delivery mechanism; 5a - First ring portion; 5b - Second ring portion; 51 - Ring-shaped body; 510 - Capsule cavity; 511 - Groove; 512 - Piercing hole; 513 - Identification information; 514 - Receiving slot; 515 - Avoidance hole; 52 - Driven wheel; 521 - First sawtooth; 522 - Extension arm; 523 - Second stopper; 531 - Sealing belt; 532 - First sealing ring; 533 - Second sealing ring; 534 - Third sealing ring; 535 - Through hole;

[0051] 6-transmission assembly; 61-ratchet; 611-clamping block; 612-first clamping member; 62-driving wheel; 621-second sawtooth; 622-external rib;

[0052] 7-belt pulley assembly; 71-intermediate gear; 72-belt pulley; 73-housing; 731-third limiting rib; 74-third rotating shaft; 741-second limiting rib; 75-first elastic member; 76-rear seat; 761-second limiting slot; 77-rotating member; 771-first limiting slot;

[0053] 8-piercing mechanism; 81-mounting seat; 811-locking member; 812-mounting column; 82-piercing member; 821-first inclined surface; 822-second inclined surface; 83-protective member; 84-second elastic member;

[0054] 9- Powder capsules. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0056] The terms "first," "second," and "third" in this application are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of such features. In the description of this application, "multiple" means at least two, for example, two, three, etc., unless otherwise specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative positional relationship, movement, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications also change accordingly. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. 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 may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products, or devices.

[0057] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0058] In the related art, the piercing mechanism of the powder inhaler includes a piercing piece, which enters the capsule cavity through the piercing hole of the powder delivery mechanism and pierces the powder capsule, so that the powder can be discharged from the powder capsule. Among them, for single-dose powder inhalers, the capsule cavity is fixed and can be reused by manually replacing the powder capsule. However, the inventors of the present application have found that for multi-dose powder inhalers, since the powder delivery mechanism contains multi-dose powder capsules, it is necessary to rotate the capsule cavity to achieve the medicine changing function, that is, the capsule cavity of the powder delivery mechanism will move relative to the piercing piece. Therefore, during use, the piercing piece may hit the side wall of the capsule cavity and be damaged, and damage to the piercing piece will directly affect the piercing function of the piercing mechanism, resulting in abnormalities when the powder capsule is pierced and the powder cannot be discharged normally.

[0059] Based on this, an embodiment of the present application provides a piercing mechanism that can reduce the risk of damage to the piercing member.

[0060] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0061] See also Figures 1 to 2 , Figure 1 A schematic structural diagram of a powder inhaler provided in one embodiment of the present application with the cover configured in a first position; Figure 2 Schematic diagram of the cover of a powder inhaler provided in one embodiment of the present application, configured in the second position. In this embodiment, a powder inhaler is provided, comprising a housing assembly 1, a deaggregating mechanism 2, a mouthpiece 3, a cover 4, a powder delivery mechanism 5, a transmission assembly 6, a take-up wheel assembly 7, and a piercing mechanism 8.

[0062] See also Figure 3 and Figure 4 , showing two disassembled schematic diagrams of the powder inhaler provided in embodiments of the present application. The housing assembly 1 comprises a first housing 11 and a second housing 12, which are arranged opposite each other and cooperate to form a receiving chamber. The powder delivery mechanism 5, transmission assembly 6, and take-up pulley assembly 7 are all detachably disposed within the receiving chamber. The first housing 11 has a window 111, through which a portion of the transmission assembly 6 is exposed for connection to the cover 4.

[0063] Combine Figure 2 The cover 4 is connected to the housing assembly 1 and can rotate back and forth between a first position and a second position. The process of the cover 4 rotating from the first position to the second position is called the opening process, and the process of rotating from the second position to the first position is called the closing process. Figure 1 As shown, when the cover 4 is configured to the first position, the cover 4 covers the suction nozzle 3 to protect the suction airway. Figure 2As shown, when the cover 4 is configured to the second position, the cover 4 exposes the suction nozzle 3 so that the powder in the powder capsule 9 can be sucked through the suction nozzle 3 .

[0064] In one embodiment, the cover 4 is linked with the transmission assembly 6, the powder delivery mechanism 5, and the take-up wheel assembly 7 to achieve a coordinated action between the various components by rotating the cover 4 back and forth between a first position and a second position, thereby enabling the powder inhaler to inhale powders such as medicinal powders, and is simpler to operate than conventional powder inhalers. The reciprocating rotation herein refers to a repetitive path, with the two rotations being in opposite directions, for example, a clockwise rotation from the first position to the second position, and then a counterclockwise rotation from the second position back to the first position.

[0065] Combine Figure 3 and Figure 4 The cover body 4 has a first connecting arm 41 and a second connecting arm 42 that are opposite to each other. The first connecting arm 41 of the cover body 4 is located on the side of the first shell 11 that is away from the second shell 12 and is connected to the transmission assembly 6 through the window 111 of the first shell 11. Specifically, one of the transmission assembly 6 and the first connecting arm 41 has a snap-fit ​​block 611, and the other has a slot 411 that matches the snap-fit ​​block 611. The snap-fit ​​block 611 is embedded in the slot 411 to achieve the connection between the transmission assembly 6 and the cover body 4. The cover body 4 drives the transmission assembly 6 to rotate through the snap-fit ​​block 611 to complete the process of opening or closing the cover. There can be two snap-fit ​​blocks 611 and two slots 411, two of which are provided on the transmission assembly 6, and two of which are provided on the first connecting arm 41.

[0066] The second connecting arm 42 of the cover 4 is located on the side of the second shell 12 facing away from the first shell 11 and is rotatably connected to the second shell 12. Of the two opposing surfaces of the second shell 12 and the second connecting arm 42, one has a first rotating shaft 121, and the other has a rotating hole 421. The first rotating shaft 121 is embedded in the rotating hole 421 and can rotate within the rotating hole 421. The first rotating shaft 121 can be provided on a side surface of the second shell 12 facing the second connecting arm 42, and the rotating hole 421 is provided on the second connecting arm 42. In this embodiment, when the cover 4 is configured from the second position to the first position, the cover 4 drives the transmission assembly 6 to reset via the engaging block 611.

[0067] In some embodiments, combined Figure 3 and Figure 5 , Figure 5A partial schematic diagram of a powder inhaler provided in one embodiment of the present application; one of the transmission assembly 6 and the first housing 11 has a first engaging member 612, and the other has a first engaging slot 112. When the lid 4 is configured to the first position, i.e., when the lid is closed, the first engaging member 612 engages with the first engaging slot 112 and emits a reset prompt tone. In this way, the first engaging slot 112 and the first engaging member 612 can restrain the lid 4 to the first position, and the reset prompt tone can be used to notify the user that the lid 4 is in the first position. At the same time, the resistance to opening the lid can be increased, reducing the probability of the lid 4 being accidentally opened.

[0068] The first clamping member 612 may be a protrusion, and the first clamping groove 112 may be a recess matching the protrusion.

[0069] In one embodiment, combined Figure 3 and Figure 4 The cover 4 has a convex point 422 on one side of the surface facing the second shell 12 and the second shell 12 has a convex point 422 on one side of the surface facing the cover 4 (see Figure 4 ), the other has a first limiting rib 122 (see Figure 3 ), during the transition of the lid 4 from the second position to the first position (i.e., after the lid is closed), the protrusion 422 passes over the first limiting rib 122. This prevents the lid 4 from rotating from the first position to the second position, increasing the resistance to opening and reducing the likelihood of accidental opening of the lid 4. Furthermore, it provides a preload force when the lid is fully opened, preventing accidental closing of the lid 4. During the closing process, the pawl of the ratchet wheel 61 is squeezed and deformed by the drive wheel 62, producing a sound.

[0070] Combine Figure 3 and Figure 4 The protrusion 422 can be formed on the side of the second connecting arm 42 facing the second housing 12, and the first limiting rib 122 can be formed on the side of the second housing 12 facing the second connecting arm 42. The number of both the protrusion 422 and the first limiting rib 122 can be two, with the two first limiting ribs 122 being provided on opposite sides of the first rotating shaft 121, and the two protrusions 422 being provided on opposite sides of the rotating hole 421.

[0071] See also Figure 6 , Figure 6 Provided for an embodiment of this application Figure 2The AA sectional view of the powder inhaler shown in the figure; the deaggregation mechanism 2 is covered at the cavity opening of the accommodating cavity and has a deaggregation cavity 21. The suction nozzle 3 is connected to the deaggregation cavity 21. The powder delivery mechanism 5 has a plurality of capsule cavities 510, and the capsule cavity 510 is used to accommodate or contains powder capsules 9. One capsule cavity 510 can be used to accommodate one powder capsule 9. The powder capsule 9 can specifically be an HPMC (Hydroxypropyl Methyl Cellulose) capsule. The transmission assembly 6 is connected to the powder delivery mechanism 5. When the cover body 4 is configured from the first position to the second position, the cover body 4 is linked to the transmission assembly 6 for rotation; the transmission assembly 6 is further linked to the powder delivery mechanism 5 for rotation, so that the plurality of capsule cavities 510 are sequentially connected to the deaggregation cavity 21.

[0072] The specific structures and functions of the suction nozzle 3, the deagglomeration mechanism 2, the powder delivery mechanism 5, the transmission assembly 6, the take-up wheel assembly 7 and the piercing mechanism 8 are introduced below.

[0073] (1) Nozzle 3

[0074] Please continue reading Figure 6 The nozzle 3 has a plurality of grids 31 and an inner straight airway 32. The plurality of grids 31 are formed at a port at the first end of the inner straight airway 32, and the inner straight airway 32 is connected to the depolymerization chamber 21 through the plurality of grids 31. The port at the second end of the inner straight airway 32 forms an air outlet. The powder in the powder capsule 9 enters the user's body through the inner straight airway 32. The air inlet area of ​​each grid 31 is 0.5 to 2 mm 2 The total air intake area of ​​all grids 31 is 10 to 60 mm 2 The outlet area of ​​nozzle 3 is 50-100mm 2 .

[0075] In some embodiments, the distance H between the bottom of the capsule cavity 510 and the grid 31 of the suction nozzle 3 is less than the length of the powder capsule 9. In this way, when the capsule cavity 510 is aligned with the deaggregation cavity 21, the powder capsule 9 can be effectively prevented from standing upright, that is, the powder capsule 9 extends in the direction Y along the deaggregation cavity 21 toward the capsule cavity 510, which would cause the powder capsule 9 to be unable to rotate.

[0076] (2) Depolymerization mechanism 2

[0077] Combine Figure 6 and Figure 7 , Figure 7This is a schematic diagram of the structure of a powder inhaler according to one embodiment of the present invention, wherein the nozzle is opened to reveal the deaggregation chamber. The deaggregation mechanism 2 further comprises an external air inlet 22 and an internal air inlet 23. The external air inlet 22 communicates with the ambient air, while the internal air inlet 23 communicates with the external air inlet 22 and the deaggregation chamber 21. During the inhalation process, when the user holds the mouthpiece 3 in their mouth and inhales, airflow enters the interior of the powder inhaler through the outer air inlets 22 on either side of the deagglomeration chamber 21 and then enters the deagglomeration chamber 21 through the inner air inlets 23 on either side of the deagglomeration chamber 21. Due to the position of the inner air inlets 23 on either side of the deagglomeration chamber 21 and the structure of the deagglomeration chamber 21, the airflow forms a rotating airflow within the deagglomeration chamber 21, forming a low-pressure area above the capsule chamber 510. The powder capsules 9 within the capsule chamber 510 rise from the capsule chamber 510 due to the pressure difference between the capsule chamber 510 and the deagglomeration chamber 21 and enter the deagglomeration chamber 21. Under the influence of the rotating airflow, the powder capsules 9 begin to rotate within the deagglomeration chamber 21, producing a sound. As the powder capsules 9 rotate, the powder within the powder capsules 9 is discharged from the openings on either side of the powder capsules 9, then enters the mouthpiece 3 through the grid 31 of the mouthpiece 3, and ultimately enters the user's body. It will be understood that the rotation plane of the powder capsules 9 is parallel to the axial direction X of the annular body 51.

[0078] Among them, such as Figure 7 After the user finishes sucking each powder capsule 9, there will be remaining empty powder capsules 9 in the deaggregation chamber 21 or the capsule chamber 510. The user can open the suction nozzle 3 and pour out the empty powder capsules.

[0079] The air inlet area of ​​the inner air inlet 23 and the outer air inlet 22, as well as the size of the air inlet area of ​​the inner air inlet 23 and the outer air inlet 22, will affect the inhalation resistance of the powder inhaler, the rotation speed of the powder capsule 9 and the deagglomeration effect. In one embodiment, the air inlet area of ​​the inner air inlet 23 is 10 to 30 mm. 2 , the air intake area of ​​the outer air intake port 22 is not less than the air intake area of ​​the inner air intake port 23.

[0080] In a specific embodiment, combining Figure 6 The deaggregating mechanism 2 further comprises an annular convex rib 24, which abuts the outer circumferential surface of the annular body 51 and defines an entrance to the deaggregating chamber 21. The powder capsules 9 in the capsule cavity 510 enter the deaggregating chamber 21 through the entrance. The abutment of the deaggregating mechanism 2 with the annular body 51 via the annular convex rib 24 effectively ensures the width and degree of contact between the two surfaces, achieving a better sealing effect between the deaggregating mechanism 2 and the annular body 51 than surface contact.

[0081] (3) Powder delivery mechanism 5

[0082] See also Figure 8 and Figure 9 , Figure 8 A disassembled schematic diagram of a powder delivery mechanism provided in one embodiment of the present application; Figure 9 A schematic structural diagram of an annular body provided in one embodiment of the present application. The powder delivery mechanism 5 includes an annular body 51, a sealing component (not shown) and a passive component (not shown). All capsule cavities 510 are formed on the annular body 51 and can be located on the outer peripheral surface of the annular body 51 and are spaced apart along the circumferential direction of the annular body 51. Specifically, all capsule cavities 510 on the annular body 51 are centrally symmetrically distributed along the circumferential direction of the annular body 51. The bottom wall of the capsule cavity 510 does not have an opening, that is, it is in a sealed state to reduce the ingress of water vapor and reduce the risk of the powder capsule 9 in the capsule cavity 510 getting damp.

[0083] In some embodiments, see Figure 10a , Figure 10a Provided for an embodiment of this application Figure 1 The powder inhaler is shown in a BB cross-sectional view. The housing assembly 1 further includes a support member 123, which elastically abuts the inner circumference of the annular body 51. This ensures close contact between the relative motion surfaces of the depolymerization chamber 21 and the capsule chamber 510. Specifically, the support member 123 supports the elastic arm. The support member 123 may be formed on the side of the second housing 12 facing the first housing 11, extending to the inner circumference of the annular body 51 and abutting against the inner circumference of the annular body 51.

[0084] In some specific embodiments, Figure 9 The inner circumference of the annular body 51 has a plurality of grooves 511 arranged at intervals along its circumferential direction; at least part of the support member 123 extends to the side where the inner circumference of the annular body 51 is located, and the support member 123 has a protrusion 124 on the side surface facing the annular body 51, and the protrusion 124 is embedded in the groove 511 and interference fits with the groove 511 to ensure that the support member 123 always supports the annular body 51, thereby achieving the effect of close contact between the outer side surface of the annular body 51 and the annular rib 24 of the depolymerization cavity 21.

[0085] The number of capsule cavities 510 on the annular body 51 can be 2-30, such as 5, 10, 15, 20, or 30. The annular body 51 can be a circular ring or a polygonal ring. The size specification model of the powder capsule 9 can be selected from 3# to 5#.

[0086] Specific, combined Figure 9 The capsule cavity 510 extends along the axial direction X of the annular body 51, and along the axial direction X of the annular body 51, at least one side wall of the capsule cavity 510 is provided with a puncture hole 512. The puncture member 82 of the puncture mechanism 8 is inserted into the capsule cavity 510 through the puncture hole 512 to puncture the powder capsule 9, so that the powder in the powder capsule 9 can be discharged.

[0087] In a specific embodiment, combining Figure 8 The annular body 51 includes a first ring portion 5a and a second ring portion 5b along its axial direction X. The capsule cavity 510 is formed on the outer peripheral surface of the first ring portion 5a, and the accommodating groove 514 is formed on the side surface of the first ring portion 5a facing away from the second ring portion 5b. The second ring portion 5b is a gear and engages with the take-up pulley assembly 7 to rotate in conjunction with the take-up pulley assembly 7 during the rotation of the annular body 51. In this embodiment, the identification information 513 is specifically provided on the side surface of the second ring portion 5b facing away from the first ring portion 5a. Specifically, the second ring portion 5b can be integrally formed with the first ring portion 5a. Both the second ring portion 5b and the first ring portion 5a can be circular rings or polygonal rings, and the diameter of the second ring portion 5b can be smaller than the diameter of the first ring portion 5a to achieve the miniaturization of the powder delivery mechanism 5 as much as possible.

[0088] Combine Figure 6 and Figure 8 The sealing assembly includes a sealing strip 531 and a sealing ring. The first end of the sealing strip 531 is connected to the take-up pulley assembly 7. The second end of the sealing strip 531 is wound around the outer surface of the annular body 51 along the circumference of the annular body 51, covering the opening of the capsule cavity 510. During the rotation of the take-up pulley assembly 7, the take-up pulley assembly 7 drives the sealing strip 531 wound around the take-up pulley assembly 7 and separates from the annular body 51, exposing the powder capsules 9 in the capsule cavity 510 and allowing the powder capsules 9 in the capsule cavity 510 to enter the deagglomeration chamber 21.

[0089] The sealing ring is provided on the side wall of the annular body 51 along the axial direction X of the annular body 51 and covers each puncture hole 512 to cooperate with the sealing tape 531 to wrap and seal the powder capsule 9 to prevent the powder capsule 9 from getting wet. The sealing ring and the sealing tape 531 can be made of materials such as aluminum foil or silicone.

[0090] In a specific embodiment, combining Figure 8 and Figure 9 , along the axial direction X of the annular body 51, at least one puncture hole 512 is provided on both side walls of the capsule cavity 510. The sealing ring specifically includes a first sealing ring 532 and a second sealing ring 533. Along the axial direction X of the annular body 51, the first sealing ring 532 is provided on the first side wall of the annular body 51, and covers all the puncture holes 512 on the corresponding side. The second sealing ring 533 is provided on the second side wall of the annular body 51 opposite to the first side wall, and covers all the puncture holes 512 on the corresponding side. Among them, a puncture hole 512 can be provided on each side wall of the capsule cavity 510. The first side wall refers to the side wall of the annular body 51 facing the first shell 11.

[0091] In some embodiments, the surfaces of the annular body 51, the sealing band 531, the first sealing ring 532, or the second sealing ring 533 are provided with a plurality of identification information 513, with each identification information 513 corresponding to each capsule cavity 510. Thus, during the rotation of the annular body 51, the identification information 513 can be used to implement a counting function to determine the usage of the powder capsules 9 within the powder inhaler. The identification information 513 can be a series of numbers or letters, allowing the user to determine the number of uninhaled powder capsules 9 or the number of inhaled powder capsules 9 based on the identification information 513.

[0092] Specifically, multiple consecutive digital markings, such as natural numbers from 0 to 15, 0 to 20, or 0 to 30, can be provided on the second sidewall of the annular body 51 by silk-screen printing, engraving, laser engraving, mold engraving, or stickers. The multiple digital markings are arranged in a ring shape. The consecutive digital markings rotate at the same angle as the annular body 51. During the lid opening process, each time the lid 4 rotates a preset angle, the annular body 51 rotates the same angle, and the value of the digital marking exposed through the second lid 4 is successively reduced by 1.

[0093] When the digital mark exposed by the second cover body 4 shows "0", continue to rotate the cover body 4, and the value of the digital mark exposed by the cover body 4 remains unchanged. This function is realized by the driven wheel 52 and the driving wheel 62 of the transmission assembly 6; for the specific implementation method, please refer to the relevant description of the transmission assembly 6 below.

[0094] In one embodiment, combined Figure 9 The annular body 51 has a receiving groove 514 on at least one side along its axial direction X, and a desiccant is contained in the receiving groove 514. The desiccant is used to dry the powder capsule 9 in the capsule cavity 510. The desiccant can be any existing desiccant used for moisture-proofing, such as soda lime, quicklime, potassium carbonate (KCO3), sodium carbonate (Na2CO3), sodium bicarbonate (NaHCO3), potassium bicarbonate (KHCO3) and calcium carbonate (CaCO3) or a mixture of several ingredients. The desiccant can be in the form of powder or block. In this embodiment, the sealing assembly can also include a third sealing ring 534, which covers the notch of the receiving groove 514 to prevent the desiccant from falling out.

[0095] The passive component includes a driven wheel 52, which is arranged on the inner side of the annular body 51. The transmission component 6 is linked to the powder delivery mechanism 5 through the driven wheel 52. Figure 11 , Figure 11A schematic structural diagram of the engagement of the first first saw tooth of the driven wheel with the driving wheel provided in an embodiment of the present application; the driven wheel 52 has a plurality of first saw teeth 521, and the plurality of first saw teeth 521 are arranged at equal intervals along the circumferential direction of the driven wheel 52, and along the circumferential direction of the driven wheel 52, the first spacing L between the first first saw tooth 521 and the last first saw tooth 521 satisfies the following formula: L>a+2b, so as to form a design of empty teeth on the driven wheel 52; wherein a is the width of the first saw tooth 521 along the circumferential direction of the driven wheel 52; and b is the distance between two adjacent first saw teeth 521 along the circumferential direction of the driven wheel 52.

[0096] The driven wheel 52 may be an internal gear connected to the annular body 51 and meshed with the transmission assembly 6 , so that the internal gear rotates in conjunction with the annular body 51 during the rotation of the transmission assembly 6 .

[0097] For details, please refer to Figure 8 The driven wheel 52 has an extension arm 522 on one side, and the third sealing ring 534 has a through hole 535. The extension arm 522 of the driven wheel 52 passes through the through hole 535 and engages with the annular body 51, thereby fixing the third sealing ring 534 between the driven wheel 52 and the annular body 51. The number of extension arms 522 can be two, three, four, or more to achieve a stable connection between the driven wheel 52 and the annular body 51.

[0098] Specific, combined Figure 10b , Figure 10b Provided for an embodiment of this application Figure 1 EE sectional view of the powder inhaler shown; the shell assembly 1 further has a first limit member 113, and the other side surface of the driven wheel 52 has multiple second limit members 523. After each rotation of the cover body 4 by a certain angle, the first limit member 113 engages with one of the second limit members 523 to ensure that one of the capsule cavities 510 is aligned with the deaggregation cavity 21, avoiding misalignment between the capsule cavity 510 and the deaggregation cavity 21, affecting the proportional distribution of the intake volume during the inhalation process, and thus affecting the inhalation resistance and deaggregation effect.

[0099] The first limiting member 113 can be a limiting elastic arm formed on the first housing 11, and the second limiting member 523 can be a limiting groove provided on the driven wheel 52. The limiting elastic arm can be inserted into the limiting groove to achieve a snap connection between the two. Of course, in other embodiments, multiple second limiting members 523 can be provided on the first housing 11, and the first limiting member 113 can be provided on the driven wheel 52.

[0100] Specifically, the contact surfaces of the limiting spring arm and the limiting groove have similar shapes and there is a certain interference to ensure that the limiting spring arm and the limiting groove are in zero-match contact, that is, the limiting spring arm and the limiting groove are in zero-gap contact, thereby achieving relative motion position alignment of the capsule cavity 510 and the depolymerization cavity 21.

[0101] The plurality of second stoppers 523 are spaced apart along the circumference of the driven wheel 52; for example, they can be equally spaced. Each second stopper 523 corresponds to a capsule cavity 510, and along the radial direction of the annular body 51, the second stopper 523 is aligned with the corresponding capsule cavity 510. "Alignment" as used herein can mean that the orthographic projection of one structure falls within or completely overlaps with another structure, or that the two structures are coaxially arranged.

[0102] The powder delivery mechanism 5 typically includes powder capsules 9 pre-loaded into an annular body 51 for use with the other components of the powder delivery mechanism 5. Alternatively, multiple annular bodies 51 may be pre-loaded, each containing a powder capsule 9. This allows the powder delivery mechanism 5 to be replaced with a new annular body 51 and powder capsules 9 after the powder capsules 9 are used up, allowing the other components of the powder delivery mechanism 5 to be reused. The following describes the assembly process of the powder delivery mechanism 5.

[0103] First, multiple powder capsules 9 are sequentially installed into the multiple capsule cavities 510 of the annular body 51, and a clamp is provided on the arc surface of the annular body 51 along its circumferential direction. The contour of the clamp matches the circumferential contour of the annular body 51 and surrounds the arc surface of the annular body 51, thereby preventing the powder capsules 9 from falling out of the capsule cavity 510. Afterwards, the sealing tape 531 is fixed to the outer surface of the annular body 51 by heat melting or other means, and then the first sealing ring 532 and the second sealing ring 533 are respectively fixed to the first side wall and the second side wall of the annular body 51 by heat melting or other means. At the same time, a desiccant is placed in the receiving groove 514 of the annular body 51. Finally, the third sealing ring 534 and the driven wheel 52 are installed in sequence. The driven wheel 52 is fixed to the annular body 51 by snaps, screws or other means, and the third sealing ring 534 is pressed to seal the receiving groove 514 to prevent the desiccant from overflowing.

[0104] The powder delivery mechanism 5 provided in this embodiment achieves multi-dose delivery by providing multiple capsule cavities 510 on the annular body 51 and placing a powder capsule 9 within each capsule cavity 510. When the powder delivery mechanism 5 is used in a powder inhaler, there is no need to carry a separate row of packaged powder capsules. This avoids the problem of bulky, separate-carrying, and inconvenient carrying of the packaged rows of powder capsules. Furthermore, the user does not need to manually tear open the aluminum foil, remove the powder capsules, and manually place the powder capsules in the powder inhaler, simplifying operation and facilitating use. Furthermore, the powder delivery mechanism 5 utilizes a sealing assembly to cover at least the cavity opening and puncture hole 512 of the capsule cavity 510, thereby encapsulating and sealing the capsule cavity 510 and preventing the powder capsules 9 within the capsule cavity 510 from becoming damp.

[0105] (4) Transmission assembly 6

[0106] Combine Figure 4 The transmission assembly 6 includes a ratchet 61 and a driving wheel 62. The second housing 12 has a second rotating shaft 125 on one side surface facing the first housing 11. The ratchet 61 has a first sleeve hole and is sleeved on the second rotating shaft 125 through the first sleeve hole, and can rotate along the circumferential direction of the second rotating shaft 125. Two clamping blocks 611 are specifically provided on the ratchet 61 and are located on opposite sides of the first sleeve hole. The driving wheel 62 has a second sleeve hole and is sleeved on the second rotating shaft 125 through the second sleeve hole, and can rotate along the circumferential direction of the second rotating shaft 125. The driving wheel 62 is specifically engaged with the driven wheel 52 to rotate in conjunction with the driven wheel 52. The driving wheel 62 can specifically be an external gear, and the driven wheel 52 can be an internal gear. Of course, the driving wheel 62 can also be an internal gear and the driven wheel 52 can be an external gear.

[0107] For details, see Figure 12 , Figure 12 This is a schematic diagram of the structure of the last first serration of the driven wheel meshing with the driving wheel according to one embodiment of the present application. The driving wheel 62 has multiple second serrations 621, which mesh with the first serrations 521. Along the circumferential direction of the driven wheel 52, the first spacing is greater than the spacing between two adjacent second serrations 621.

[0108] like Figure 11 As shown, when the cover body 4 is in the first state, the driving wheel 62 is engaged with the first serration 521 of the driven wheel 52. However, due to the friction between the sealing belt 531 and the annular body 51, the last tooth of the empty tooth design cannot be guaranteed to be fully engaged and will be disengaged in advance, resulting in the angle of the last rotation not reaching the predetermined angle value. Figure 12As shown, when the cover body 4 is in the second position, in order to ensure that the annular body 51 can be in place for the last time the cover is opened, and will not be out of place due to premature tooth loss, the angle of the driven wheel 52 is offset to allow the driving wheel 62 and the driven wheel 52 to interfere with each other in motion; that is, the driving wheel 62 and the last first serration 521 of the driven wheel 52 are not completely free from air, but retain a certain interference, but the interference does not reach a state of meshing. Among them, the interference amount is greater than 0° and less than [360° / (Q*2 / 3)], and Q is the total number of teeth of the driven wheel 52. The purpose of this design is to ensure that the annular body 51 can rotate a predetermined angle for the last rotation to ensure that the corresponding capsule cavity 510 is exactly aligned with the depolymerization cavity 21.

[0109] When identification information 513 displays "0," each time the lid is opened, the second serrations 621 of the driving wheel 62 interfere with the first serrations 521 of the driven wheel 52. However, this interference does not drive the annular body 51 to rotate. However, due to the plastic deformation of the first and second serrations 521, the second serrations 621 of the driving wheel 62 can pass through this interference. Furthermore, this principle ensures that the annular body 51 reaches the predetermined position when the number jumps from "1" to "0."

[0110] The following describes the process in which the cover 4 drives the driven component 6 and the powder delivery mechanism 5 to rotate.

[0111] Combine Figure 4 , during the opening process (i.e. Figure 4 During the counterclockwise rotation process, the pawl of the ratchet wheel 61 begins to rotate counterclockwise under the linkage of the cover body 4 and gradually abuts against the drive wheel 62. As a result, the pawl drives the drive wheel 62 to rotate. The drive wheel 62 engages with the driven wheel 52, thereby driving the driven wheel 52 to rotate. The driven wheel 52 further drives the annular body 51 to rotate, so that the multiple capsule cavities 510 on the annular body 51 are sequentially connected to the depolymerization chamber 21, thereby realizing the switching of the capsule cavities 510 and the dressing change process.

[0112] It is understood that the travel of the lid body 4 from the first position to the second position (i.e., the lid opening travel) includes an idle travel and a loaded travel following the idle travel. During the idle travel, the lid body 4 drives the ratchet 61 to rotate, but the pawl of the ratchet 61 has not yet contacted the drive wheel 62, and the drive wheel 62 does not rotate, nor does it cause the powder delivery mechanism 5 to rotate. During the loaded travel, the lid body 4 triggers the drive wheel 62 of the transmission assembly 6 to rotate, thereby causing the annular body 51 of the powder delivery mechanism 5 to rotate, thereby causing the multiple capsule cavities 510 to sequentially communicate with the depolymerization chamber 21, thereby completing the delivery of the multiple powder capsules 9.

[0113] During the lid opening load stroke, each time the lid body 4 rotates a certain angle, the annular body 51 of the powder delivery mechanism 5 is linked to rotate by a predetermined angle α by controlling the reduction ratio between the driving wheel 62 and the driven wheel 52, so that the next capsule cavity 510 rotates to communicate with the depolymerization cavity 21. The predetermined angle α satisfies the following formula: α = 360° / (n+1), where n is the number of capsule cavities 510 on the annular body 51 of the powder delivery mechanism 5.

[0114] In some embodiments, see Figure 5 , the first shell 11 has a buckle position 115, and the driving wheel 62 has an outer rib position 622. After the cover opening load stroke, the cover opening stroke also includes an over-covering stroke. In the over-covering stroke, the outer rib position 622 can pass through the buckle position 115 to complete the cover opening process and lock the relative position of the cover body 4 and the first shell 11, and a prompt sound will be emitted during the process of the outer rib position 622 crossing the buckle position 115 to remind the user that the cover body 4 is in the second position. By setting the over-covering stroke, the resistance between the annular body 51 and the sealing belt 531 can be overcome, so that the annular body 51 reaches the predetermined position and stays at the final position (such as the 100° position).

[0115] like Figure 5 As shown, the outer rib 622 forms a step portion. During the process of opening the cover, the pawl of the ratchet 61 specifically abuts against the step portion to drive the driving wheel 62 to rotate; during the process of closing the cover, the pawl of the ratchet 61 is specifically squeezed and deformed by the outer rib 622, thereby making a sound.

[0116] In the open lid idle stroke, the cover body 4 rotates at an angle of 5° to 30°, for example, 5°, 10°, 15°, 20°, 25°, 28°, or 30°. In the open lid loaded stroke, the cover body 4 rotates at an angle of 70° to 75°, for example, 70°, 72°, or 75°. In the open lid overstroke, the cover body 4 rotates at an angle of 3° to 8°, for example, 3°, 5°, or 8°. For example, the rotation angle range of the cover body 4 is 28° during the empty opening stroke, 72° during the loaded opening stroke, and 5° during the over-opening stroke. When the cover body 4 is in the first position, the rotation angle of the cover body 4 is 0°. During the opening process, the cover body 4 begins to rotate, and after rotating to 28°, the pawl of the ratchet 61 abuts the drive wheel 62. The cover body 4 continues to rotate and rotates to the 100° position, which is the final resting position of the cover body 4. The cover body 4 then continues to rotate to 105°, causing the outer rib 622 to pass through the buckle position 115, thereby locking the relative position of the cover body 4 and the first shell 11 and emitting a warning sound.

[0117] (5) Take-up wheel assembly 7

[0118] See also Figure 13 , Figure 13 The present invention provides a schematic structural diagram of a powder inhaler after removing the second shell when the cover body provided in one embodiment of the present application is in the second position. The take-up wheel assembly 7 includes an intermediate gear 71 and a take-up wheel 72. The intermediate gear 71 is meshed with the annular body 51 and the take-up wheel 72, respectively. There can be two intermediate gears 71, which are meshed with each other, and one of the intermediate gears 71 is meshed with the second ring portion 5b of the annular body 51, and the other intermediate gear 71 is meshed with the take-up wheel 72. The number of intermediate gears 71 can be set according to actual needs. The first end of the sealing belt 531 is connected to the take-up wheel 72; during the rotation of the annular body 51, the annular body 51 is linked to the intermediate gear 71 for rotation, and the intermediate gear 71 is linked to the take-up wheel 72 for rotation, so that the sealing belt 531 and the annular body 51 are separated at the annular rib 24 and wound around the take-up wheel 72.

[0119] The transmission ratio between the annular body 51 and the belt reel 72 is a first ratio, and the transmission ratio between the driven wheel 52 and the driving wheel 62 is a second ratio, wherein the first ratio is greater than the second ratio. In this way, the sealing belt 531 can be kept taut.

[0120] In one embodiment, see Figures 14 to 16 , Figure 14 A cross-sectional view of a take-up pulley according to an embodiment of the present application. Figure 15 A schematic diagram of the disassembly of a take-up wheel provided in one embodiment of the present application. Figure 16 for Figure 15 The belt pulley 72 includes a housing 73 , a third shaft 74 , a first elastic member 75 , a rear seat 76 and a rotating member 77 .

[0121] The rotating member 77 is meshed with the intermediate gear 71. Figure 15 and Figure 16 The rotating member 77 has an insertion hole, and the inner circumference of the insertion hole has a first limiting groove 771. The first limiting groove 771 extends along the axial direction of the rotating member 77 and extends to a side surface of the rotating member 77 along its axial direction X. The third rotating shaft 74 is sleeved within the insertion hole of the rotating member 77, and the outer side wall of the third rotating shaft 74 has a second limiting rib 741. The second limiting rib 741 is embedded in the first limiting groove 771 to limit the relative position of the third rotating shaft 74 and the rotating member 77 along the circumferential direction of the third rotating shaft 74.

[0122] The rear seat 76 is sleeved on the rotating member 77, and the contact surface with the rotating member 77 is an inclined surface. The third rotating shaft 74 passes through the rear seat 76 to connect with the rotating member 77. The inner wall surface of the outer shell 73 has a third limiting rib 731, and the outer wall surface of the rear seat 76 has a second limiting groove 761. The outer shell 73 is sleeved on the outer wall surface of the rear seat 76, and the third limiting rib 731 is embedded in the second limiting groove 761 to limit the relative position of the outer shell 73 and the rear seat 76 along the circumferential direction of the rear seat 76. The first elastic member 75 is sleeved on the outside of the third rotating shaft 74, and is elastically compressed between the rear seat 76 and the outer shell 73 along the axial direction of the third rotating shaft 74 to increase the friction between the rear seat 76 and the rotating member 77. Specifically, as Figure 14 As shown, along the axial direction of the third rotating shaft 74, one end of the first elastic member 75 abuts against the rear seat 76, and the other end abuts against the housing 73. The first elastic member 75 can be a spring.

[0123] The specific assembly process of the tape reel 72 is as follows: with the rotating part 77 as the base, the rear seat 76, the first elastic part 75 and the shell 73 are placed in sequence from bottom to top, and finally the third rotating shaft 74 is inserted from the upper hole of the shell 73, and passes through the insertion hole of the rotating part 77 according to the alignment structure, and finally the third rotating shaft 74 is rotated, and the two second limiting ribs 741 on the third rotating shaft 74 enter the first limiting groove 771 of the rotating part 77 to complete the assembly.

[0124] The working principle of the take-up wheel 72 is as follows: as the number of turns of the sealing tape 531 wound around the take-up wheel 72 increases, the maximum diameter of the structure formed by the take-up wheel 72 and the sealing tape 531 wound thereon will gradually increase, and the angle of rotation of the take-up wheel 72 is the same each time, so the length of the sealing tape 531 wound each time will gradually increase, and the length of the sealing tape 531 needs to be compensated, otherwise the tension on the sealing tape 531 will gradually increase, and eventually it will break. The housing 73 and the rotating member 77 can rotate relative to each other. The rear seat 76 is provided with two second limiting grooves 761 that cooperate with the two third limiting ribs 731 of the housing 73. When the rear seat 76 rotates, the housing 73 is also rotated. The rear seat 76 and the rotating member 77 are in contact with each other at an angle, and there is friction between them. This friction is determined by the materials of the rear seat 76 and the rotating member 77 and the elastic force of the first elastic member 75. When the tension on the sealing belt 531 is greater than the friction between the rear seat 76 and the rotating member 77, the rotating member 77 continues to rotate while the rear seat 76 remains stationary, thereby ensuring that the tension on the sealing belt 531 does not continue to increase, thereby preventing the sealing belt 531 from being broken. The friction between the rear seat 76 and the rotating member 77 is much smaller than the force that would cause the sealing belt 531 to be broken.

[0125] (6) Piercing mechanism 8

[0126] See also Figures 17 to 19 , Figure 17A schematic structural diagram of a piercing mechanism provided in one embodiment of the present application; Figure 18 Provided for an embodiment of this application Figure 2 A CC sectional view of the powder inhaler shown; Figure 19 Provided for an embodiment of this application Figure 7 A DD-axis cross-sectional view of the powder inhaler is shown. A piercing mechanism 8 is provided on the housing assembly 1 and is used to insert into the capsule cavity 510 and pierce the powder capsule 9 within the capsule cavity 510, allowing the powder within the powder capsule 9 to be discharged. The number of piercing mechanisms 8 depends on whether each capsule cavity 510 has a piercing hole 512 on one or both sides of the annular body 51 along the axial direction X. If each capsule cavity 510 has a piercing hole 512 on one side of the annular body 51, the number of piercing mechanisms 8 is one. If each capsule cavity 510 has a piercing hole 512 on both sides of the annular body 51, the number of piercing mechanisms 8 is two. These two piercing mechanisms 8 are provided on either side of the annular body 51 along the axial direction X and inserted into the corresponding piercing hole 512 to pierce the powder capsule 9. This is used as an example in the embodiments of this application. For ease of understanding, the following embodiments of this application use the piercing mechanism 8 located on the first side of the annular body 51 as an example.

[0127] like Figure 17 As shown, the piercing mechanism 8 includes a mounting seat 81, a piercing member 82, a protective member 83 and a second elastic member 84. The mounting seat 81 is connected to the first shell 11 and can slide relative to the first shell 11 to allow the piercing member 82 to be inserted into the capsule cavity 510. Specifically, as shown in FIG. Figure 18 As shown, the mounting base 81 has a retaining member 811, and the first housing 11 has a sliding groove 114. The retaining member 811 engages with the groove wall of the sliding groove 114 and can slide along the extension direction of the sliding groove 114 to achieve a sliding connection between the piercing mechanism 8 and the first housing 11. The retaining member 811 limits the sliding process of the piercing mechanism 8 to prevent the piercing mechanism 8 from falling off the first housing 11. In a specific embodiment, a portion of the mounting base 81 is exposed from the first housing 11 and serves as a button. The user can manually press or press the button with other components to drive the piercing mechanism 8 to slide relative to the first housing 11, thereby passing through the piercing hole 512 and inserting into the capsule cavity 510.

[0128] The protective member 83 and the piercing member 82 are respectively provided on the mounting seat 81 and both extend in the first direction X. Specifically, Figure 18 As shown, the mounting seat 81 has a mounting post 812, and the mounting post 812 has a mounting hole. One end of the piercing member 82 is inserted and fixed in the mounting hole, and the other end extends along the first direction X in a direction away from the mounting seat 81 to form an insertion end. The insertion end of the piercing member 82 is used to pass through the piercing hole 512 of the annular body 51 and be inserted into the capsule cavity 510 to pierce the powder capsule 9.

[0129] In one embodiment, see Figures 20 to 21 , which are schematic diagrams of the structure of the piercing member 82 provided in this application from different perspectives. The insertion end has a first inclined surface 821. Along a first direction X, the first inclined surface 821 extends from the end of the insertion end closest to the mounting seat 81 to the end facing away from the mounting seat 81. The inclination angle β of the first inclined surface 821 is 1°-60°; for example, β can be 20°, 30°, or 60°. Forming the first inclined surface 821 at the insertion end reduces the resistance of the insertion end to piercing the powder capsule 9, facilitating the piercing of the powder capsule 9 by the piercing member 82.

[0130] Further, in another specific embodiment, please continue to refer to Figure 20 The insertion end further has a second inclined surface 822, which extends along the first direction X to the end of the insertion end away from the mounting seat 81, and the second inclined surface 822 intersects with the first inclined surface 821. There is a second inclined surface 822 on each side of the first inclined surface 821 to further reduce the penetration resistance.

[0131] Of course, the insertion end of the piercing member 82 can also be a structural member with a needle-shaped end, such as a lancet. The piercing member 82 can be cylindrical as a whole.

[0132] Combine Figure 17 and Figure 19 Along the first direction X, the end of the protective member 83 facing away from the mounting seat 81 protrudes beyond the end of the piercing member 82 facing away from the mounting seat 81. Thus, when the piercing mechanism 8 is pressed to pierce the powder capsule 9, the protective member 83 contacts the first side wall of the annular body 51 before the piercing member 82, thereby preventing the piercing member 82 from being damaged by colliding with the side wall of the annular body 51, which would affect the piercing function of the piercing member 82 and cause abnormalities when the powder capsule 9 is pierced, resulting in failure to discharge powder.

[0133] In a specific embodiment, combining Figure 9 and Figure 19 Along the circumference of the annular body 51, an escape hole 515 is formed on at least one side of the piercing hole 512. The escape hole 515 is used to avoid the piercing mechanism's protective member 83. When the protective member 83 of the piercing mechanism 8 is aligned with the escape hole 515 of the powder delivery mechanism 5, pressing the mounting seat 81 of the piercing mechanism 8 allows the piercing member 82 of the piercing mechanism 8 to be inserted into the capsule cavity 510, thereby piercing the powder capsule 9 therein. If the protective member 83 is misaligned with the escape hole 515, pressing the mounting seat 81 causes the protective member 83 to abut against the sidewall of the escape hole 515, thereby preventing the piercing member 82 from abutting against the annular body 51 and protecting the piercing member 82.

[0134] Specific, combined Figure 9Along the circumference of the annular body 51, a relief hole 515 is provided on either side of the puncture hole 512, with the openings of the relief holes 515 and the openings of the puncture hole 512 facing the same direction. This ensures that when the puncture mechanism 8 moves in the first direction X, the protective member 83 and the puncture member can be inserted into the relief holes 515 and puncture hole 512, respectively. The number of protective members 83 matches the number of relief holes 515, with each relief hole 515 accommodating one protective member 83. Specifically, a relief hole 515 can be provided between two adjacent puncture holes 512 to reduce the impact of the openings on the strength of the annular body 51.

[0135] Specifically, the extension length of the avoidance hole 515 along the first direction X is not less than the length m of the insertion end of the piercing member 82 along the first direction X, so as to ensure that the insertion end of the piercing member 82 is completely inserted into the capsule cavity 510 .

[0136] The number of the protective members 83 can be one, two or more. Preferably, the number of the protective members 83 can be two, and the two protective members 83 are arranged on both sides of the piercing member 82 opposite to each other.

[0137] like Figure 18 As shown, the second elastic member 84 is sleeved on the outside of the piercing member 82, with one end of the second elastic member 84 sleeved and fixed on the outside of the mounting post 812, and the other end abutting the first shell 11. When the mounting seat 81 is pressed, the second elastic member 84 is elastically compressed; after the pressing force of the mounting seat 81 is removed, the mounting seat 81 returns to its original position due to the elastic restoring force of the second elastic member 84, and the piercing member 82 is simultaneously moved out of the capsule cavity 510, thereby preventing the piercing member 82 from obstructing the next rotation of the annular body 51.

[0138] Specifically, at least one fourth limiting rib is provided on the outer side of the mounting post 812, and the second elastic member 84 is interference-fitted with the fourth limiting rib to fix the relative position of the second elastic member 84 and the mounting seat 81. The second elastic member 84 may be a spring.

[0139] The following describes the specific operating process of the piercing mechanism 8 in a powder inhaler: After the lid is opened, that is, the lid body 4 is rotated a certain angle to align one capsule cavity 510 of the annular body 51 with the deaggregation cavity 21, the mounting bases 81 of the piercing mechanism 8 on both sides of the powder delivery mechanism 5 are pressed simultaneously until the mounting bases 81 cannot slide anymore and then released. At this point, the piercing member 82 of the piercing mechanism 8 passes through the piercing hole 512 and enters the capsule cavity 510, piercing the powder capsule 9 with a sound of breaking through the shell. After releasing the mounting bases 81, they automatically return to their original position due to the elastic restoring force of the second elastic member 84.

[0140] The piercing mechanism 8 provided in this embodiment is provided with a protective member 83, with the end of the protective member 83 facing away from the mounting seat 81 protruding beyond the end of the piercing member 82 facing away from the mounting seat 81. Thus, when the piercing mechanism 8 is inserted into the capsule cavity 510 of the powder delivery mechanism 5 to pierce the powder capsule 9, the protective member 83 contacts the first side wall of the annular body 51 before the piercing member 82. This prevents the piercing member 82 from being damaged by striking the first side wall of the annular body 51, which could affect the piercing function of the piercing member 82 and cause abnormalities during piercing of the powder capsule 9, resulting in failure to discharge powder.

[0141] It will be appreciated that the powder inhaler of the present application includes a plurality of suction strokes, each of which is used to draw powder from a powder capsule 9. Each suction stroke includes a dosing stroke, a piercing stroke, and a reset stroke. In the dosing stroke, the capsule cavity 510 exposes the powder capsule 9 therein. In the piercing stroke, the piercing member 82 of the piercing mechanism 8 inserts into the capsule cavity 510 and pierces the powder capsule 9. In the reset stroke, the piercing mechanism 8 automatically resets.

[0142] The powder inhaler provided in this embodiment provides a plurality of capsule cavities 510 on the powder delivery mechanism 5, so that powder capsules 9 can be placed in the plurality of capsule cavities 510 respectively. During the rotation of the powder delivery mechanism 5, the plurality of capsule cavities 510 can be sequentially connected with the deaggregation chamber 21, so that the powder capsules 9 in each capsule cavity 510 can enter the deaggregation chamber 21 and be inhaled by the user. In this way, not only is it unnecessary to carry the powder capsules 9 separately, thus avoiding the inconvenience of carrying the powder capsules 9, but it also eliminates the need to tear open the aluminum foil package and manually place the powder capsules 9 in the powder inhaler, thereby simplifying the operation. At the same time, by causing the cover body 4 to rotate in conjunction with the transmission assembly 6, the transmission assembly 6 rotates in conjunction with the powder delivery mechanism 5 during the rotation process, and the powder delivery mechanism 5 further rotates in conjunction with the take-up wheel assembly 7 during the rotation process, thereby separating the sealing belt 531 of the powder delivery mechanism 5 from the annular body 51 and winding it around the take-up wheel assembly 7, thereby exposing the powder capsules 9 in the capsule cavity 510. When the capsule cavity 510 is connected to the deaggregation chamber 21, the powder capsules 9 in the capsule cavity 510 can enter the deaggregation chamber 21. This powder inhaler realizes the linkage between the cover body 4, the powder delivery mechanism 5, the transmission assembly 6, and the take-up wheel assembly 7, and is more simple to operate.

[0143] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A piercing mechanism, characterized in that: include: Mounting seat; The protective member and the piercing member are respectively provided on the mounting seat and both extend in the first direction; Furthermore, along the first direction, one end of the protection member facing away from the mounting seat protrudes beyond one end of the piercing member facing away from the mounting seat.

2. The piercing mechanism according to claim 1, characterized in that: The number of the protective members is two, and the two protective members are oppositely arranged on two sides of the piercing member.

3. The piercing mechanism according to claim 1, characterized in that: The end of the piercing member facing away from the mounting seat forms an insertion end, and the insertion end has a first inclined surface. Along the first direction, the first inclined surface extends from the end of the insertion end close to the mounting seat to the end facing away from the mounting seat; and the inclination angle of the first inclined surface is 1°-60°.

4. The piercing mechanism according to claim 3, characterized in that: The insertion end further has a second inclined surface, which extends along the first direction to an end of the insertion end away from the mounting seat, and the second inclined surface intersects with the first inclined surface.

5. The piercing mechanism according to claim 1, characterized in that: The mounting seat has a mounting post, the mounting post has a mounting hole, and one end of the piercing member is inserted and fixed in the mounting hole; The piercing mechanism further includes: a second elastic member, which is sleeved on the outside of the piercing member, and one end of the second elastic member is sleeved and fixed on the outside of the mounting column, and the other end is used to abut against the housing assembly.

6. A powder delivery mechanism, characterized in that: include: An annular body having a capsule cavity for receiving a powder capsule; A puncture hole is provided on at least one side wall along the axial direction of the annular body, and the puncture member of the puncture mechanism is inserted into the capsule cavity through the puncture hole; an avoidance hole is provided on at least one side of the puncture hole along the circumferential direction of the annular body, and the avoidance hole is used to avoid the protective member of the puncture mechanism.

7. The powder delivery mechanism according to claim 6, wherein: The capsule cavity is provided with a puncture hole on both side walls along the axial direction of the annular body; each puncture hole is provided with an avoidance hole on both sides along the circumferential direction of the annular body, and one avoidance hole is used to accommodate one protective member.

8. The powder delivery mechanism according to claim 6 or 7, characterized in that: The annular body is provided with a plurality of capsule cavities, and the plurality of capsule cavities are arranged at intervals along the circumferential direction of the annular body on the outer peripheral surface of the annular body.

9. A powder inhaler, characterized in that: include: The piercing mechanism is the piercing mechanism according to any one of claims 1 to 5; A powder delivery mechanism, which is a powder delivery mechanism according to any one of claims 6 to 8; In which, when the protective member of the piercing mechanism is aligned with the avoidance hole of the powder delivery mechanism, the mounting seat of the piercing mechanism is pressed, and the piercing member of the piercing mechanism can be inserted into the capsule cavity to pierce the powder capsule in the capsule cavity; when the protective member is misaligned with the avoidance hole, the mounting seat is pressed, and the protective member abuts against the side wall of the avoidance hole, thereby limiting the abutment between the piercing member and the powder delivery mechanism.

10. The powder inhaler according to claim 9, characterized in that The extension length of the avoidance hole is not less than the length of the insertion end of the piercing member along the first direction.

11. The powder inhaler according to claim 9, characterized in that Also includes: The powder delivery mechanism is detachably arranged in the shell component; a portion of the mounting seat is exposed from the shell component and serves as a button.

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