阅读说明：本技术 一种吸入粉雾剂给药装置 (Administration device for inhaling powder inhalation ) 是由 聂毅 刘珊姗 张樱 史楷岐 于 2019-11-18 设计创作，主要内容包括：公开了一种吸入粉雾剂给药装置,其载药器内部设有装载药囊的第一载药腔和/或第二载药腔,第一载药腔和/或第二载药腔的底部设有空气入口,载药器包括位于左侧面的至少一个第一孔和/或右侧面的至少一个第二孔,左侧面设有第一凸台和/或右侧面设有第二凸台；戳针一端连接按钮,另一端可滑动连接于第一孔和/或第二孔以在克服弹性元件的弹性力时戳穿药囊；螺旋器包括圆筒本体以及设在圆筒本体内的用于产生涡流的叶片结构,叶片结构沿竖直方向扭转预定角度形成螺旋流道,来自空气入口的气体携带来自药囊的药物粉末依次通过栅格流道、螺旋流道以及平流流道进入嘴部。(The drug delivery device comprises a drug carrier, wherein a first drug loading cavity and/or a second drug loading cavity for loading a drug bag are/is arranged in the drug carrier, an air inlet is formed in the bottom of the first drug loading cavity and/or the bottom of the second drug loading cavity, the drug carrier comprises at least one first hole positioned on the left side surface and/or at least one second hole positioned on the right side surface, a first boss is arranged on the left side surface, and/or a second boss is arranged on the right side surface; one end of the puncture needle is connected with the button, and the other end of the puncture needle is slidably connected with the first hole and/or the second hole so as to puncture the medicine bag when overcoming the elastic force of the elastic element; the spiral device comprises a cylinder body and a blade structure which is arranged in the cylinder body and used for generating vortex, the blade structure is twisted by a preset angle along the vertical direction to form a spiral flow channel, and the gas from the air inlet carries the medicine powder from the medicine bag to sequentially pass through the grid flow channel, the spiral flow channel and the advection flow channel to enter the mouth.)

1. A drug delivery device for inhalation of a dry powder inhalation comprising a drug loading unit and a mouthpiece unit, wherein,

the medicine carrying unit comprises a medicine carrying unit,

the base is provided with a first opening above the base and comprises a second opening positioned on the left side wall and/or a third opening positioned on the right side wall;

the medicine carrier is assembled inside the base through the first opening, a first medicine carrying cavity and/or a second medicine carrying cavity for carrying a medicine bag are/is arranged inside the medicine carrier, an air inlet is formed in the bottom of the first medicine carrying cavity and/or the bottom of the second medicine carrying cavity, the medicine carrier comprises at least one first hole positioned on the left side surface and/or at least one second hole positioned on the right side surface, and a first boss is arranged on the left side surface and/or a second boss is arranged on the right side surface;

a button arrangement, comprising,

a button movably connected to the second opening and/or the third opening,

an elastic element, one end of which is assembled on the first boss and/or the second boss, and the other end of which is connected with the button,

a piercing needle having one end connected to the button and the other end slidably connected to the first and/or second hole to pierce the capsule while overcoming the elastic force of the elastic member;

the suction nozzle unit movably connected with the medicine carrying unit comprises,

a mouthpiece, which comprises a mouth for inhalation,

a grill positioned within the nozzle and positioned at the first opening, the grill including a grill flow passage,

the screw is arranged above the grid and positioned in the suction nozzle, the screw comprises a cylinder body and a blade structure which is arranged in the cylinder body and used for generating vortex, the blade structure is twisted by a preset angle along the vertical direction to form a spiral flow channel,

wherein, the suction nozzle lower surface forms the inhalation flow channel with the upper surface laminating of medicine carrying unit, and the inhalation flow channel includes grid runner, spiral runner and the advection runner between spiral ware and the mouth, and the gas that comes from air inlet carries the medicine powder that comes from the anther sac and loops through grid runner, spiral runner and advection runner entering the mouth.

2. The inhalation device according to claim 1, wherein preferably the sachet comprises first particles of a first size and second particles of a second size, the first size being larger than the second size, the second size being in the micron range.

3. The inhalation device of claim 2, wherein the second particles releasably attach to the first particles.

4. The inhalation device according to claim 1, wherein the inhalation device further comprises a cap detachably attached to the mouthpiece unit to close and open the mouthpiece.

5. The inhalation device according to claim 1, wherein the mouthpiece bottom is provided with a fourth opening in gaseous communication with the air inlet.

6. The inhalation device according to claim 1 wherein the cross-section of the advection flow path remains substantially constant and the vertical length of the straight flow path is more than 2 times the vertical length of the spiral flow path.

7. The inhalation device of claim 1, wherein the cross-sectional dimensions of the first drug-loaded chamber and the second drug-loaded chamber are proportioned to mix the drug powder proportionally.

8. The inhalation device according to claim 1, wherein the height of the cylindrical body is more than one-half of its diameter, the number of blades of the blade structure is 2, 3 or 4, and the cylindrical body is twisted with the blade structure.

9. The inhalation device of claim 1, wherein the first aperture and/or the second aperture has a diameter greater than 2 mm.

Technical Field

The invention relates to the field of oral inhalation preparations, in particular to a drug delivery device for inhalation of a powder inhalation.

Background

An oral inhalation formulation refers to a formulation that delivers a drug to the respiratory tract and/or lungs by the inhalation route for local or systemic action, primarily for the treatment of respiratory and other diseases. Clinically, the common oral inhalation preparation comprises an inhalation aerosol and an inhalation powder aerosol. In contrast to aerosols, inhalation powders are no longer dissolved using a propellant and are stored directly in sachets, blisters or reservoirs. When in use, the medicine powder enters the body by the inspiration of the patient, thereby avoiding the problem of the matching of the breath and the external power.

Inhalation of the dry powder inhalation needs to be performed by a drug delivery device (inhalation device), and representative drug delivery devices in the present use include those of GlaxoSmithKlineOf (blister type), AstraZeneca

(of the repository type) and of Boringer Invehringer Boehringer Ingelheim

(drug capsule type). The difference is mainly in the loading unit of the medicine powder, but the inhalation flow channel is often very simple, so that the medicine powder flows unevenly in the inhalation process, the intermediate flow velocity is too large and easily impacts the oral cavity of a patient, and the inhalation efficiency of the effective ingredients is relatively low, usually less than 30%. Also, typically, the drug delivery device has only one drug-carrying chamber, and can only be used to administer a single drug component, or a mixture of drug components. In the case of a mixture of pharmaceutical ingredients, the high temperature and heat generated during mixing using a blender may cause the active ingredients therein to interact and cause their decomposition, resulting in poor therapeutic effect or even danger to the patientAnd (5) risking.

The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is well known to those of ordinary skill in the art.

Disclosure of Invention

In order to solve the above problems, the present invention provides a device for administering an inhalation powder formulation, which is adapted to generate a vortex flow in an inhalation flow path, can prevent the powder of a medicinal ingredient from hitting the oral cavity of a patient, and can sufficiently mix the powder of the medicinal ingredient. The purpose of the invention is realized by the following technical scheme.

A drug delivery device for inhalation of a dry powder inhalation comprising a drug loading unit and a mouthpiece unit, wherein,

the medicine carrying unit comprises a medicine carrying unit,

the base is provided with a first opening above the base and comprises a second opening positioned on the left side wall and/or a third opening positioned on the right side wall;

the medicine carrier is assembled inside the base through the first opening, a first medicine carrying cavity and/or a second medicine carrying cavity for carrying a medicine bag are/is arranged inside the medicine carrier, an air inlet is formed in the bottom of the first medicine carrying cavity and/or the bottom of the second medicine carrying cavity, the medicine carrier comprises at least one first hole positioned on the left side surface and/or at least one second hole positioned on the right side surface, and a first boss is arranged on the left side surface and/or a second boss is arranged on the right side surface;

a button arrangement, comprising,

a button movably connected to the second opening and/or the third opening,

an elastic element, one end of which is assembled on the first boss and/or the second boss, and the other end of which is connected with the button,

a piercing needle having one end connected to the button and the other end slidably connected to the first and/or second hole to pierce the capsule while overcoming the elastic force of the elastic member;

the suction nozzle unit movably connected with the medicine carrying unit comprises,

a mouthpiece, which comprises a mouth for inhalation,

a grill positioned within the nozzle and positioned at the first opening, the grill including a grill flow passage,

the screw is arranged above the grid and positioned in the suction nozzle, the screw comprises a cylinder body and a blade structure which is arranged in the cylinder body and used for generating vortex, the blade structure is twisted by a preset angle along the vertical direction to form a spiral flow channel,

wherein, the suction nozzle lower surface forms the inhalation flow channel with the upper surface laminating of medicine carrying unit, and the inhalation flow channel includes grid runner, spiral runner and the advection runner between spiral ware and the mouth, and the gas that comes from air inlet carries the medicine powder that comes from the anther sac and loops through grid runner, spiral runner and advection runner entering the mouth.

In the administration device, the sachet comprises first particles of a first size and second particles of a second size, the first size being larger than the second size, the second size being in the micron range.

In the administration device, the second particles are releasably attached to the first particles.

In the medication administering device, the medication administering device further includes a cap detachably coupled to the suction nozzle unit to close and open the suction nozzle.

In the administration device, the bottom of the suction nozzle is provided with a fourth opening which is in gas communication with the air inlet.

In the administration device, the cross section of the advection flow channel is basically kept unchanged, and the vertical length of the straight flow channel is more than 2 times of that of the spiral flow channel.

In the administration device, the cross-sectional dimensions of the first drug-loaded cavity and the second drug-loaded cavity are in a proportional relationship to proportionally mix the particles.

In the administration device, the height of the cylinder body is larger than one half of the diameter of the cylinder body, the number of the blades of the blade structure is 2, 3 or 4, and the cylinder body is twisted along with the blade structure.

In the administration device, the diameter of the first hole and/or the second hole is larger than 2 mm.

Compared with the prior art, the invention has the beneficial effects that:

the invention can prevent and overcome the over-fast intermediate flow velocity in the traditional flow passage, so that the flow velocity distribution of the flow passage is uniform, and the medicine powder is prevented from impacting the oral cavity of a patient. The combination of single or multiple components of the drug can be administered and the helical flow path can generate a vortex flow to thoroughly mix the drug powder upon inhalation by the patient. The spiral flow channel can also generate centrifugal force, increase collision of drug particles with the wall surface of the flow channel, improve separation of micron-sized effective particles of the drug from large particle carriers, and generate high shear stress on the wall surface of the flow channel, so that the flow channel has a self-cleaning effect. Meanwhile, the spiral flow channel generates small resistance, and even and stable flow can be generated at the outlet of the suction nozzle under different suction flow rates.

The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly apparent, and to make the implementation of the content of the description possible for those skilled in the art, and to make the above and other objects, features and advantages of the present invention more obvious, the following description is given by way of example of the specific embodiments of the present invention.

Drawings

Various other advantages and benefits of the present invention will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. Also, like parts are designated by like reference numerals throughout the drawings.

In the drawings:

FIG. 1 is a schematic view of the construction of a drug delivery device according to the present invention;

FIG. 2 is a schematic view showing the construction of a mouthpiece unit of the medication administering device according to the present invention;

fig. 3 is a schematic view of a drug delivery unit of a drug delivery device according to the present invention;

FIG. 4 is a vertical cross-section of the drug delivery device and the airflow diagram during inhalation;

FIG. 5 is a view of the internal and external construction of the screw of the present invention;

FIG. 6 is a cross-sectional view of a screw of various configurations of the present invention;

FIG. 7 is a schematic illustration of the manner in which a sachet of the present invention is placed in the present device and its manner of puncturing;

fig. 8 is a schematic diagram of the process of use of the present invention.

The invention is further explained below with reference to the figures and examples.

Detailed Description

Specific embodiments of the present invention will be described in more detail below with reference to fig. 1 to 8. While specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

It should be noted that certain terms are used throughout the description and claims to refer to particular components. As one skilled in the art will appreciate, various names may be used to refer to a component. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The description which follows is a preferred embodiment of the invention, but is made for the purpose of illustrating the general principles of the invention and not for the purpose of limiting the scope of the invention. The scope of the present invention is defined by the appended claims.

For the purpose of facilitating understanding of the embodiments of the present invention, the following description will be made by taking specific embodiments as examples with reference to the accompanying drawings, and the drawings are not to be construed as limiting the embodiments of the present invention.

For better understanding, as shown in fig. 1, a drug delivery device includes a medicated unit C and a mouthpiece unit B, wherein,

the medicine carrying unit C comprises a medicine carrying unit C,

the base 5 is provided with a first opening 15, and the base 5 comprises a second opening 16 positioned on the left side wall and/or a third opening 17 positioned on the right side wall;

a medicine carrier 4 assembled inside the base 5 through a first opening 15, wherein a first medicine loading cavity 27 and/or a second medicine loading cavity 21 for loading a medicine bag are/is arranged inside the medicine carrier 4, an air inlet 22 is arranged at the bottom of the first medicine loading cavity 27 and/or the second medicine loading cavity 21, the medicine carrier 4 comprises at least one first hole 28 positioned on a left side surface 19 and/or at least one second hole 23 positioned on a right side surface 20, the left side surface 19 is provided with a first boss 18 and/or the right side surface 20 is provided with a second boss 24;

a button arrangement, comprising,

a button 8, which is movably connected to said second opening 16 and/or third opening 17,

an elastic member 7 having one end fitted to the first boss 18 and/or the second boss 24 and the other end connected to the button 8,

a piercing needle 6 having one end connected to the button 8 and the other end slidably connected to the first hole 28 and/or the second hole 23 to pierce the capsule while overcoming the elastic force of the elastic member 7;

the suction nozzle unit B movably connected with the medicine carrying unit C comprises,

the mouthpiece 1, which comprises a mouth 25 for inhalation,

a grid 3, the grid 3 being located inside the nozzle 1 and being arranged at said first opening 15, said grid 3 comprising grid flow channels 10,

the screw 2 is arranged above the grid 3, the screw 2 positioned in the suction nozzle 1 comprises a cylinder body 13 and a blade structure 14 arranged in the cylinder body 13 and used for generating vortex, the blade structure 14 is twisted by a preset angle along the vertical direction to form a spiral flow channel 11,

wherein, the lower surface of the suction nozzle 1 is attached to the upper surface of the medicine carrying unit C to form a suction flow channel, the suction flow channel comprises a grid flow channel 10, a spiral flow channel 11 and a advection flow channel 12 between the spiral device 2 and the mouth part 25, and the air from the air inlet 22 carries particles from the medicine bag to sequentially pass through the grid flow channel 10, the spiral flow channel 11 and the advection flow channel 12 to enter the mouth part 25.

The administration device of the invention generates vortex flow through the spiral flow channel 11, on one hand, the problem that the intermediate flow rate of the traditional inhalation flow channel is too high is overcome, so that uniform flow rate distribution is generated, and the medicine powder is prevented from impacting the oral cavity of a patient; on the other hand, when multiple components of the medicine are combined, the components are fully mixed in the inhalation process, and the interaction and decomposition generated when the components of the medicine are mixed are avoided. Meanwhile, the spiral flow channel 11 can also generate centrifugal force to increase the shearing stress of the wall surface of the flow channel, so that the flow channel has a self-cleaning effect.

For further understanding of the present invention, in one embodiment, the pharmaceutical powder may be a single component or a combination of two components. Each pharmaceutical component is packaged within the same capsule 26. The device comprises a cover A, a suction nozzle unit B and a medicine carrying unit C. The shroud A is connected with the outer surface of the drug carrying unit C, and when the drug delivery device is not used, the shroud A is used for protecting the inside of the suction nozzle unit B and the inside of the drug carrying unit C from being cleaned. Suction nozzle unit B can be movable be connected to medicine carrying unit C surface, and when primary importance, suction nozzle unit B lower surface forms complete suction flow channel with the laminating of medicine carrying unit C's upper surface, through promoting suction nozzle unit B, can open suction flow channel.

As shown in fig. 2, the nozzle unit B includes a nozzle 1, a screw 2, and a grid 3. The outer surface of the mouthpiece 1 has a shape that conforms to the shape of the user's mouth and is intended to be placed in the user's mouth during inhalation. The screw 2 and the grid 3 are respectively assembled inside the suction nozzle 1, and the screw 2 is positioned above the grid 3. The grid 3 forms a grid flow channel 10 for separating the effective components of the medicament, which are usually micron-sized particles, from the large carrier particles; the spiral flow channel 11 of the screw 2 can overcome the excessive flow velocity in the middle part, and generate uniform distribution flow velocity and vortex, so that the medicine powder is fully mixed. The internal outlet of the mouthpiece 1 forms an advection channel 12, the cross-section of which remains substantially constant, so that the flow of the medicament powder tends to be uniform and stable before entering the mouth of the patient.

Fig. 3 shows an example of a medicated unit C. It includes medicine carrier 4, base 5, stabs needle 6, spring 7 and stabs button 8. According to the vertical cross-section of the drug delivery device of fig. 4, the drug carrier 4 is mounted inside the base 5, which is internally provided with two drug carrying cavities 21, which can be loaded with one capsule or two capsules 26 at the same time for inhalation of a single drug component or a combination of two drug components, respectively. The drug-loaded cavities 21 are open at their bottom 22, respectively, and serve as air inlets for inhalation of the drug powder from the openings 9 in the mouthpiece 1. The upper part and the lower part of the two sides of the medicine carrying device 4 are respectively provided with a small hole 23 for leading the poking needle 6 to extend into the medicine carrying cavity 21. Bosses 24 on both sides of the drug carrier 4 are fitted with springs 7 for supporting the piercing button 8 to form a button mechanism. The lancet 6 is additionally mounted and ruptured within the button 8 to form a rupturing mechanism. The piercing buttons 8 are installed at both sides of the base 5 and slide in a horizontal direction.

Figure 5 shows the geometry of the screw 2. The outer part of the suction nozzle is a cylindrical body structure 13, and the outer surface of the suction nozzle is assembled and attached to the inner surface of the suction nozzle 1. The inner part is a blade structure 14 which is scanned in the vertical direction and twisted at an angle for twisting the air, thereby generating a vortex.

As shown in fig. 6, the leaf structure 14 may include different numbers of leaves, such as a four-leaf structure, a three-leaf structure, and a two-leaf structure, depending on the properties of each drug powder. The cylindrical body structure 13 may also have a quincunx structure and rotate with the blades to form a quincunx quad-blade structure, a tri-blade structure, and a bi-blade structure. And the blade structures may have the same or different blade lengths, or the same or different twist angles.

Figure 7 shows the manner in which the sachet 26 is placed in the drug delivery device. After the mouthpiece unit a is lifted from its base position to open the loading chamber 21 of the medicated unit C, a single or two capsules 26 containing medicament powder can be placed in the loading chamber 21. When the both-side piercing button 8 is pressed after the mouthpiece unit a is closed, the piercing needle 6 is punched into the medicine loading chamber 21 to pierce the capsule 26 loaded in the medicine loading chamber 21. When the piercing button 8 is released, the piercing needle 6 returns to the initial position and closes the small holes 23 on both sides of the drug carrier 4. Subsequently, the user inhales the powder, and by lifting the mouthpiece unit a to replace the capsule 26, the user can also check whether he has inhaled the full dose of the medicament.

Figure 4 also shows the flow pattern of the air stream during inhalation. Air enters the interior of the device through an opening 9 in the bottom of the mouthpiece 1 as shown in figure 2. Air then enters the loading chamber 21 through an opening 22 at the bottom of the loading chamber. Air entering the loading chamber 21 will activate the medicament powder in the capsule 26 and carry it out of the capsule piercing opening. The air carrying the medicament powder continues to rise and reaches the grid 3. The air will be divided into a plurality of strands which pass through the grid flow channels 10 where the micron-sized active ingredient particles of the medicament are detached from the large carrier particles. The air carrying the active ingredient particles of the medicament will then pass through the helical flow path 11, which in the illustration 4 is a four-bladed helical flow path 15. The air is divided into four strands, which are twisted to generate a spiral flow. This spiral flow of air will be well mixed in the subsequent advection flow channel 12 and achieve a uniform and steady flow before leaving the mouthpiece 1. Therefore, the invention overcomes the over-fast intermediate flow velocity in the traditional flow passage, ensures that the flow velocity of the flow passage is uniformly distributed, and avoids the medicine powder from impacting the oral cavity of a patient. And the device of the present invention, when multiple component compositions are administered, the spiral flow path is capable of generating a vortex flow to thoroughly mix the pharmaceutical ingredient powders.

In a preferred embodiment of the drug delivery device, the sachet comprises first particles of a first size and second particles of a second size, the first size being larger than the second size, the second size being in the micrometer range.

In a preferred embodiment of the drug delivery device, the second particles are releasably attached to the first particles.

In a preferred embodiment of the medication delivery device, the medication delivery device further comprises a cap A, which is detachably connected to the suction nozzle unit B for closing and opening the suction nozzle 1.

In the preferred embodiment of the medication delivery device, the mouthpiece 1 is provided with a fourth opening 9 at its bottom, which is in air communication with the air inlet 22.

In the preferred embodiment of the administration device, the cross-section of the advection flow channel 12 is kept substantially constant, and the vertical length of the straight flow channel is more than 2 times the vertical length of the spiral flow channel 11.

In the preferred embodiment of the device, the first cavity 27 and the second cavity 21 are sized in cross-section in a proportional relationship to proportionally mix the particles.

In the preferred embodiment of the drug delivery device, the height of the cylindrical body 13 is greater than one-half of the diameter of the cylindrical body, the number of the blades of the blade structure 14 is 2, 3 or 4, and the cylindrical body 13 is twisted along with the blade structure 14.

In a preferred embodiment of the drug delivery device, the first hole 28 and/or the second hole 23 have a diameter larger than 2 mm.

In one embodiment, the drug powder in the sachet 26 may be a single component or a combination of two components, each packaged within the same sachet 26. The device mainly comprises a cover A, a suction nozzle unit B and a medicine carrying unit C. The cover cap a should be attached to the outer surface of the medicated unit C for protecting the inside of the drug delivery device from being clean. Suction nozzle unit B can be connected to medicine carrying unit C surface of activity for when the device is used for inhaling, suction nozzle unit B lower surface forms complete inhalation flow path with the laminating of medicine carrying unit C's upper surface.

In one embodiment, the suction nozzle unit B comprises an inner and an outer part, the outer part being divided into the suction nozzle 1, in which the patient is placed during inhalation. The inner part consists of two parts, one of which is fixed to the top of the other. The upper part is usually a screw 2, the top of which is the outlet from which the powder exits the device, and the bottom of which is fixed to the top of the lower part. The lower part is of a grid 3 structure, is right opposite to the upper part of the medicine carrying cavity of the medicine carrying unit C and is used for inhaling medicine powder. The above components constitute a suction flow path of the suction nozzle unit B, which can be divided into three parts, from bottom to top, a grill flow path 10, a spiral flow path 11, and a flat flow path 12, respectively. In general, the active ingredient of the pharmaceutical agent is in the form of micron-sized particles, which tend to agglomerate, and therefore are often mixed with large carrier particles (e.g., lactose) to adhere them to the surface of the carrier particles. However, when the drug is administered by inhalation, it is necessary to separate the particles of the active ingredient of the drug from the large carrier particles, and the grid flow path 10 can achieve such an effect. The subsequent spiral flow path 11 can then generate a vortex flow to overcome the excessive flow velocity in the middle and the drug powder is mixed well to create a uniform distribution flow velocity. In addition, the vortex can increase the shearing stress of the wall surface of the flow channel and increase the self-cleaning effect of the flow channel. The cross-section of the final advection flow channel 12 remains substantially constant, allowing the drug powder flow to be uniform and stable before entering the patient's mouth. The straight flow path should be more than 2 times the vertical length of the spiral flow path 11 to provide sufficient distance for the spiral flow to stabilize.

In one embodiment, the screw 2 in the nozzle unit B is also divided into an outer part and an inner part. The outer portion is a cylindrical body structure having a height generally exceeding 50% of the outer diameter. The inner part is a blade structure 14 which is scanned in the vertical direction and twisted at an angle to twist the air and thereby create a vortex. The blade structure 14 may comprise a different number of blades depending on the nature of each medicament powder, and the cylindrical body structure may also have a "quincunx" configuration and rotate with the blades. And the blade structures 14 may have the same or different blade lengths, or the same or different twist angles.

In one embodiment, medicated unit C includes two parts, a medicated mechanism and a piercing mechanism. The medicine carrying mechanism comprises 2 medicine carrying cavities, the number of the medicine carrying cavities is generally 2, the medicine carrying cavities are used for carrying medicine bags 26 filled with medicine powder, the positions of the medicine carrying cavities correspond to the positions of the grids 3 of the suction nozzle unit B, and the medicine powder is directly sucked. The drug loading mechanism needs to be open on both sides to enable the piercing needle 6 of the piercing mechanism to enter the drug loading cavity and pierce the capsule 26 to release the drug powder. The size of the loading chamber is generally slightly larger than the standard size of the sachet 26. The medicine carrying mechanism also needs to be provided with a small hole at the bottom of the medicine carrying cavity, and the hole diameter is generally more than 2mm so as to be used as an inlet of an inhalation flow channel to provide enough air when powder is inhaled. The puncturing mechanism is composed of a puncturing button 8, a spring and a puncturing needle 6. The piercing button 8 is located on the base 5 and is movable along the horizontal sliding rail. The spring is connected with the puncturing button 8 and the medicine carrying mechanism and is used for resetting the puncturing button 8. The pricking pin 6 is assembled on the pricking button 8 and is positioned at the openings at two sides of the medicine carrying mechanism, and when the pricking button 8 is pressed, a medicine bag positioned in the medicine carrying cavity is pricked.

In one embodiment, the user lifts the cap a from its original position to open the medication delivery device, and continues to lift the mouthpiece unit B to open the medication loading chamber. Depending on the formulation requirements, the user may place one or two sachets 26 in 2 loading chambers. The sachet 26 carries the required powder of the pharmaceutical composition. After the medicine bag 26 is loaded, the user returns the mouthpiece unit B to its original position to close the medicine loading chamber. The user then needs to quickly press the piercing button 8 to pierce and release the medicament powder in the capsule 26. The user then inhales the powder through the suction nozzle unit B. After use, the user may replace the used sachet 26 by lifting the mouthpiece unit B.

As shown in fig. 8, the medicine bag is loaded in the first medicine loading cavity 27 and/or the second medicine loading cavity 21, the lower surface of the suction nozzle 1 is fitted with the upper surface of the medicine loading unit C to form a suction flow channel, the push button 8 is pressed to make the poking needle 6 slide in the first hole 28 and/or the second hole 23 to poke the medicine bag against the elastic force of the elastic element 7, the air from the air inlet 22 enters the medicine bag from the poking opening 27 at the bottom of the medicine bag, carries the medicine powder in the medicine bag, flows out from the poking opening 28 at the top of the medicine bag, and then sequentially passes through the grid flow channel 10, the spiral flow channel 11 and the advection flow channel 12 to enter the mouth 25.

The spiral flow channel 11 of the administration device has the advantages of avoiding the medicine powder from impacting the oral cavity of a patient, fully mixing the medicine powder, self-cleaning the flow channel and being wide in applicable age. The drug powder may be a single drug component or a combination of two drug components, with the drug component powders being packaged in separate sachets 26. The medicine sacs 26 are pierced by the left and right piercing needles 6, respectively, to release the medicine component powder. Upon inhalation, the powder of the pharmaceutical ingredient first passes through a mesh grid, which separates the active ingredient particles (usually in the micron size) from the large carrier particles. Then, a vortex is generated through the spiral flow channel 11, so that the problem that the intermediate flow speed of the traditional simple suction flow channel is too high is solved, and uniform flow speed distribution is generated; on the other hand, when a plurality of components of a drug are combined, they are mixed well. Finally, on leaving the mouthpiece 1, a medicament powder is produced with a uniform flow rate distribution and mixing. The invention has simple structure and convenient use.

Industrial applicability

The drug delivery device of the present invention may be manufactured and used in the field of inhalation drug delivery.

The foregoing describes the general principles of the present application in conjunction with specific embodiments, however, it is noted that the advantages, effects, etc. mentioned in the present application are merely examples and are not limiting, and they should not be considered essential to the various embodiments of the present application. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the foregoing disclosure is not intended to be exhaustive or to limit the disclosure to the precise details disclosed.

The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the application to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.