CN109939309B - Powder inhalation device - Google Patents

Abstract

The invention relates to a powder inhalation device, comprising: a shell, which is hollow inside and has a top end and a bottom end, the bottom end is provided with a ventilation hole; a metering piece is arranged in the shell; a plurality of metering units, The metering units are arranged at intervals on the metering element, and the multiple metering units have at least two sizes of specifications; the base is movably arranged in the housing, and a suction port is opened on the The mouth is exposed from the top end, the base is provided with a suction channel, the first end of the suction channel can be communicated with the metering unit, and the second end is communicated with the suction mouth; The first end of the suction channel is arranged on the base at intervals, and the powder storage member can store powder inside, and the bottom of the powder storage member communicates with the metering unit. This powder inhalation device has an adjustable powder dose.

Description

Powder inhalation device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a powder inhalation device.

Background

In recent years, more and more researchers are dedicated to the research on respiratory diseases (asthma and chronic obstructive pulmonary disease), and it is important to design a suction type device with wide application range and reusability to deeply realize that the targeted and non-invasive drug device is greatly helpful for treating the diseases of patients.

Most dry powder inhalation devices currently on the market present a common problem in terms of feedback of clinical patient use. The common dry powder inhalation device is provided with a powder storage, the medicine is delivered every time, the dose is divided according to the volume and then the medicine is inhaled by a patient, the operation is complicated, and the use is very inconvenient.

Disclosure of Invention

In view of the above, it is necessary to provide a powder inhalation device with adjustable powder dose, which aims at the problem that the powder needs to be divided into doses before each inhalation.

A powder inhalation device comprising:

the shell is hollow and provided with a top end and a bottom end, and the bottom end is provided with a vent hole;

the metering piece is arranged in the shell;

the metering units are arranged on the metering piece at intervals and have at least two sizes;

the base is movably arranged in the shell, a suction inlet is formed in the base and is exposed out of the top end, a suction channel is arranged in the base, the first end of the suction channel can be communicated with the metering unit, and the second end of the suction channel is communicated with the suction inlet; and

the powder storage part and the first end of the suction channel are arranged on the base at intervals, powder can be stored in the powder storage part, and the bottom of the powder storage part is communicated with the metering unit.

According to the powder inhalation device, the metering units are set to different specifications according to the dosage requirement of inhaled powder, the powder is stored through the powder storage part, the powder enters the metering units from the bottom of the powder storage part, the first end of the inhalation channel moves to the metering units filled with the powder by rotating or moving the base, a user inhales from the inhalation port, outside air enters from the vent hole, the powder on the metering units is brought into the inhalation channel from the first end of the inhalation channel, and finally the powder with the specified dosage is inhaled by the user from the inhalation port. Can satisfy the powder inhalation of different dosages, control accurate, the dosage is adjustable, and the operation is very convenient.

In one embodiment, the housing comprises a first housing and a second housing, the first housing is hollow and open at one end, the second housing is hollow and open at one end, the open end of the first housing is opposite to the open end of the second housing and at least partially coincides with the open end of the second housing, the first housing is rotatably connected with the second housing, a sealed cavity is formed between the first housing and the second housing, and the vent hole is arranged on the second housing and is communicated with the sealed cavity; the metering piece and the base are arranged in the sealing cavity, the base is movably connected with the first shell, and the suction inlet is exposed out of the end part of the first shell far away from the second shell. Can drive the base rotation through first shell, perhaps the base removes first shell relatively, quick convenient realization is inhaled the first end switch of passageway and is aimed at the metering unit who is equipped with likepowder thing, and then accomplishes the inspiratory operation to likepowder thing.

In one embodiment, the first housing and the second housing are cylindrical, the inner side wall of the first housing is circumferentially provided with a pawl, the outer side wall of the second housing is circumferentially provided with a ratchet wheel, and the pawl is meshed with the ratchet wheel to rotatably connect the first housing and the second housing. Can make first shell relative second shell can more accurate rotation, the interval between each metering unit of deuterogamying can realize just switching the suction of the first end of once inhaling the passageway and aim at through rotatory first shell gear.

In one of them embodiment, still include the solid fixed ring of the equal open-ended cover tube in both ends, gu fixed ring's one end with the open end of first shell can be dismantled and be connected, just gu fixed ring with the junction of first shell is formed with the step groove, the ratchet butt of second shell is located in the step groove. The setting of solid fixed ring can make first shell second shell relatively rotate more stably, can play fine sealed effect to can make things convenient for the change of likepowder thing, pull down solid fixed ring after can open and store up the change of powder piece and carrying out likepowder thing.

In one embodiment, the inner bottom wall of the first housing is provided with a guide rail extending in the radial direction, and the base is slidably arranged on the guide rail. Can make the base can follow the radial displacement of first shell, it is more convenient to switch the first end alignment of the metering unit of different specifications and suction channel and inhale, and the structure is more stable.

In one embodiment, the portable electronic device further comprises a support, the support is vertically arranged on the guide rail, a sliding groove penetrates through the base along the length direction, and one end of the support penetrates through the sliding groove and is rotatably connected with the second shell. Can make first shell and base can use the support as the axis of rotation, when relative second shell rotates, more stable.

In one embodiment, the measuring element is in a disc shape, the plurality of measuring units are arranged at intervals along a circumferential direction with the center of the measuring element as a center, the plurality of measuring units are arranged at least two circles along circumferences with different radiuses, the measuring units on the same circumference have the same size, and the measuring units on different circumferences have different size. The metering unit is arranged, so that when the base rotates relative to the second shell, the powder storage part rotates to the metering unit which is adjacent in the circumferential direction and has the same dosage to introduce the powder, and the first end of the inhalation channel rotates to the metering unit containing the powder and inhales; when the base moves in the radial direction of the first housing, the powder storage member moves to the radially adjacent metering unit of the other dose to introduce the powder, and when the first housing is rotated again, the first end of the inhalation passage is aligned with the metering unit of the other dose and inhaled. The quantitative inhalation of the medicinal powder and the adjustable mode of the dosage are more reasonable, and the operation is more convenient.

In one embodiment, the base is transversely provided with a notch groove, the notch groove is communicated with the bottom of the powder storage part and the first end of the suction channel, and the metering part is inserted into the notch groove so that the bottom of the powder storage part and the first end of the suction channel can be communicated with the metering unit. The base can move relative to the metering piece conveniently, and powder in the metering units at different positions of the metering piece can be sucked. Interference fit between measurement and the second shell can prevent effectively that the friction that applys when measurement receives the base and removes and take place to remove, influences the accuracy nature that the dose was inhaled.

In one embodiment, the suction device further comprises a collecting member which is hollow inside and open at two ends, the collecting member is bent and extends along the radial direction of the shell, and one end of the collecting member is communicated with the notch groove and is opposite to the first end of the suction channel. Through setting up the collection piece, can effectually prevent that the user from arousing under the holding posture of difference that the powder from leaking inside the casing from the metering unit. The curved collecting member is effective to collect powder leaking from within the metering unit. When a user inhales, external air can enter from the end part of the collecting piece, and the collected powder is brought into the inhalation channel and inhaled, so that the accuracy of the inhalation quantity of the powder is ensured.

In one embodiment, at least one of the following features is included: the metering unit is a metering hole penetrating through the metering piece, and the aperture of the metering hole is gradually increased or decreased along the radial direction of the metering piece; the powder storage part comprises a body with a hollow interior, and a pressure part and a pressure plate which are arranged in the body, the body is arranged on the base, the bottom of the body is provided with a discharge hole communicated with the metering unit, the pressure plate is connected with the driving end of the pressure part, and the pressure part drives the pressure plate to press the powder in the body into the metering unit through the discharge hole; the top end of the shell is provided with a slot communicated with the inside, the slot is communicated with the suction inlet, and the cover plate is rotatably arranged at the slot to open or close the suction inlet; the air drying device is arranged in the shell and is positioned at the vent hole. The metering unit is designed into a metering hole, so that the powder led out from the powder storage part can be stored more conveniently, and the metering units with different apertures can meet the requirements of different dosages; the powder in the powder storage part can be pressed into the metering unit by driving the pressure plate through the pressure part, the operation is convenient, the structure is stable, and the powder can still be pressed into the metering unit without adopting a specific holding posture by a user; the cover plate can seal the suction inlet, so that external dust, debris and the like are prevented from entering the suction channel during non-use, and the internal pollution, blockage and discomfort caused by suction are prevented; when a user inhales the powder from the suction inlet, water vapor in the air can be dried by the air drying part, and the water vapor in the air can be effectively prevented from entering the powder storage part during non-use periods to cause the powder to be moistened.

Drawings

FIG. 1 is a schematic view of an embodiment of a powder inhalation device according to the present invention;

FIG. 2 is a schematic view of another embodiment of the powder inhalation device of the present invention;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a top view of FIG. 2;

fig. 5 is a schematic view of the structure of a metering member and a metering unit in the powder inhalation device of fig. 2;

FIG. 6 is a schematic structural view showing an example of the internal structure of the powder inhalation device shown in FIG. 2;

fig. 7 is a schematic structural view of another example of the internal structure of the powder inhalation device shown in fig. 2.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a housing; 11. a first housing; 111. a pawl; 112. grooving; 12. a second housing; 121. a ratchet wheel; 2. a metering member; 21. a through hole; 3. a metering unit; 31. a first metering tank; 32. a second metering tank; 33. a third metering slot; 4. a base; 41. a suction inlet; 42. a suction channel; 43. a chute; 44. a notch groove; 5. a powder storage part; 51. a body; 52. a pressure member; 53. pressing a plate; 54. an upper baffle plate; 6. a powder; 7. sealing the cavity; 8. a cover plate; 9. a fixing ring; 10. a step groove; 20. positioning pins; 30. an air drying member; 40. a guide rail; 50. a support; 501. a U-shaped open end; 502. a rotating shaft; 60. a collecting member; 70. and (4) a hinge.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

Referring to fig. 1 and 2, in one embodiment, the powder inhalation device includes: a housing 1, a metering member 2, a plurality of metering units 3, a base 4 and a powder storage member 5 for storing a powder 6. The housing 1 is a hollow cylinder and has a top end and a bottom end, and the bottom end is provided with a vent hole. The metering member 2 is arranged in the shell 1, a plurality of metering units 3 are arranged on the metering member 2 at intervals, the metering units 3 can be used for dividing the powder 6 into doses, and the metering units 3 can be provided with a plurality of specifications with different sizes according to requirements. The base 4 is movably disposed in the housing 1, and specifically, the base 4 is rotatable in the housing 1 and movable in a radial direction of the housing 1. The base 4 has a suction port 41, and the suction port 41 is exposed from the top end of the housing 1. Specifically, the suction port 41 may be a kidney-shaped groove formed by recessing the top of the base 4, and the suction port 41 extends along the length direction of the base 4. The base 4 is provided with a suction passage 42 inside, and a first end of the suction passage 42 can communicate with the metering unit 3 and a second end communicates with the suction port 41. The powder storage member 5 is provided on the base 4 and spaced from the first end of the suction passage 42, and the bottom of the powder storage member 5 can communicate with the metering unit 3. The powder inhalation device can set the metering unit 3 to different specifications according to the dosage requirement of inhaled powder 6, store the powder 6 through the powder storage part 5, enable the powder 6 to enter the metering unit 3 from the bottom of the powder storage part 5, enable the first end of the inhalation channel 42 to move to the metering unit 3 filled with the powder 6 by rotating or moving the base 4, enable a user to suck through the inhalation port 41, enable outside air to enter from the vent hole, bring the powder 6 in the metering unit 3 into the inhalation channel 42 from the first end of the inhalation channel 42, and finally enable the powder 6 with the specified dosage to be inhaled by the user through the inhalation port 41. Can satisfy the 6 inhales of likepowder of different doses, control is accurate, and the dose is adjustable, and the operation is very convenient.

Referring to fig. 1 and 3, in one embodiment, the housing 1 includes a first cylindrical shell 11 and a second cylindrical shell 12. The first housing 11 and the second housing 12 are both hollow and open at one end, and the open end of the first housing 11 is opposite to the open end of the second housing 12 and at least partially overlaps. The first housing 11 and the second housing 12 are rotatably matched, and a sealed cavity 7 is formed between the first housing 11 and the second housing 12. The vent hole is arranged on the second shell 12 and is communicated with the sealed cavity 7. The metering element 2 and the base 4 are both disposed within the sealed chamber 7, and the base 4 is movably connected to the first housing 11. After the first housing 11 and the second housing 12 are mounted, the end of the first housing 11 away from the second housing 12 is the top end of the first housing 11, the end of the second housing 12 away from the first housing 11 is the bottom end of the second housing 12, and the suction port 41 is exposed from the top end of the first housing 11. Can drive base 4 through first shell 11 and rotate, perhaps base 4 removes relative to first shell 11, the quick convenient first end of realization suction channel 42 changes the position in order to aim at the metering unit 3 that is equipped with likepowder 6, and then accomplishes the operation of inhaling likepowder 6.

Referring to fig. 1 and 4, specifically, the open end of the first housing 11 faces the open end of the second housing 12, and the first housing 11 is sleeved on the second housing 12 to form a partial overlap. The inner side wall of the first housing 11 is circumferentially provided with a pawl 111, the outer side wall of the second housing 12 is circumferentially provided with a ratchet wheel 121, and the pawl 111 is engaged with the ratchet wheel 121 to rotatably connect the first housing 11 with the second housing 12. Therefore, the first shell 11 can rotate more accurately relative to the second shell 12, and the alignment suction of the first end of the suction channel 42 and the metering unit 3 can be changed once by rotating the first shell 11 by one gear according to the distance between the metering units 3.

Referring to fig. 3, the powder inhalation device further includes a sleeve-shaped fixing ring 9 having both ends open. One end of the fixing ring 9 is detachably connected with the open end of the first housing 11, a step groove 10 is formed at the connection part of the fixing ring 9 and the first housing 11, and the ratchet wheel 121 of the second housing 12 is abutted and arranged in the step groove 10. The arrangement of the fixing ring 9 can make the first casing 11 rotate more stably relative to the second casing 12, and the fixing ring 9 can play a good sealing role, so that a gap can be effectively prevented from being formed between the pawl 111 of the first casing 11 and the ratchet wheel 121 of the second casing 12, and the gap can enter air to cause interference when the powder 6 is sucked. In addition, the fixing ring 9 is arranged to facilitate replacement of the powder 6, and the powder storage part 5 can be opened and the powder 6 can be replaced by detaching the fixing ring 9.

Referring to fig. 6, in order to facilitate the installation of the fixing ring 9 and the first housing 11, the fixing device further includes a positioning pin 20, the positioning pin 20 is disposed at one end of the fixing ring 9 and protrudes outwards, the opening end of the first housing 11 is recessed inwards to form a fixing hole, and the positioning pin 20 is inserted into the fixing hole. When other powder 6 needs to be replaced, the fixing ring 9 needs to be removed from the first casing 11, and then the first casing 11 needs to be removed.

The powder inhalation device further comprises a cover plate 8. An open slot 112 communicated with the inside is opened on the end of the first casing 11 far away from the second casing 12, the open slot 112 is communicated with the suction port 41, and the cover plate 8 is rotatably provided at the open slot 112 to open or close the suction port 41. The cover plate 8 is provided to seal the suction port 41 and prevent dust and debris from entering the suction passage 42 during non-use, causing contamination and clogging of the interior of the suction device and causing discomfort to the user. Specifically, the cover plate 8 may be pivotally connected to the slot 112 by a hinge 70.

Referring to fig. 1, the powder inhalation device further includes an air drying member 30, and the air drying member 30 is disposed in the second housing 12 at the vent hole. When the user inhales the powder 6 through the inhalation port 41, the water vapor entrained in the air can be dried by the air drying member 30, and the water vapor in the air can be effectively prevented from entering the powder storage member 5 during non-use to cause the powder 6 to be moistened.

Referring to fig. 3, the axes of the first housing 11 and the second housing 12 are coincident, and the suction passage 42 is disposed obliquely so as to form an acute angle with the axes. The inclined arrangement of the inhalation passage 42 can form an inclined flow guide, so that the powder 6 can be dispersed more uniformly when inhaled, and the powder 6 can enter the body along with the airflow more gradually, thereby avoiding discomfort caused by too fast inhalation speed.

Referring to fig. 6, in an embodiment, the inner bottom wall of the first housing 11 is provided with a guide rail 40 extending radially, and the base 4 is slidably disposed on the guide rail 40. The base 4 can move along the radial direction of the first shell 11, and the switching of the metering units 3 with different specifications and the alignment and suction of the first end of the suction channel 42 are more convenient and the structure is more stable. Specifically, the top of the base 4 is provided with a slide plate 43, and the slide plate 43 is provided in the guide rail 40 so that the base 4 can move in the radial direction of the first housing 11 relative to the guide rail 40.

Referring to fig. 7, the powder inhalation device further includes a bracket 50, the bracket 50 is vertically disposed on the guide rail 40, the base 4 is provided with a sliding slot 43 along the length direction, and one end of the bracket 50 penetrates the sliding slot 43 and is rotatably connected with the second housing 12. The bracket 50 includes a U-shaped opening end 501 and a rotating shaft 502, the U-shaped opening end 501 is connected to the guide rail 40, one end of the rotating shaft 502 is connected to the U-shaped opening end 501, and the other end penetrates through the sliding groove 43 and is rotatably connected to the second housing 12. The first housing 11 and the base 4 can be rotated with respect to the second housing 12 with the holder 50 as a rotation axis, and can be stabilized.

Referring to fig. 5, in the embodiment, the metering device 2 is disc-shaped, the plurality of metering units 3 are arranged at intervals along the circumferential direction with the center of the metering device 2 as the center of the circle, the plurality of metering units 3 are arranged at least two circles along the circumferences with different radiuses, the metering units 3 on the same circumference have the same size, and the metering units 3 on different circumferences have different sizes. The metering unit 3 is arranged in such a way that when the base 4 rotates relative to the second housing 12, the powder storage part 5 rotates to the circumferentially adjacent metering unit 3 with the same dosage to introduce the powder 6, and the first end of the inhalation passage 42 rotates to the metering unit 3 containing the powder 6 and inhales; when the base 4 is moved in the radial direction of the first housing 11, the powder storage member 5 is moved to the radially adjacent metering unit 3 of the other dose to introduce the powder 6, and when the first housing 11 is rotated again, the first end of the inhalation passage 42 is aligned with the metering unit 3 of the other dose and inhaled. The quantitative inhalation of the medicinal powder and the adjustable mode of the dosage are more reasonable, and the operation is more convenient.

Referring to fig. 1, the base 4 is transversely provided with a notch groove 44, the notch groove 44 is communicated with the bottom of the powder storage member 5 and the first end of the suction channel 42, and the metering member 2 is inserted into the notch groove 44 so that the bottom of the powder storage member 5 and the first end of the suction channel 42 can be communicated with the metering unit 3. The base 4 is moved relative to the metering member 2 to effect inhalation of the powder 6 in the metering unit 3 at different positions of the metering member 2. The measuring element 2 is formed in a disc shape to be fitted into the notch groove 44 of the base 4, and has a through hole 21 at the center. The metering piece 2 is fixedly arranged in the second shell 12 and is in interference fit with the second shell 12, so that the metering piece 2 can be effectively prevented from moving due to the friction force applied when the base 4 moves and rotates, and the accuracy of the powder 6 in dose inhalation is influenced. The base 4 is located in the through hole 21, and the metering member 2 is inserted in the notch groove 44 of the base 4.

Referring to fig. 5, the metering unit 3 may be configured to feed the first, second, and third metering slots 31, 32, and 33 respectively, and the sizes of the first, second, and third metering slots 31, 32, and 33 are gradually smaller at a specific distance along the radial direction of the metering member 2. The spacing distance of adjacent gear metering slots, the number of the metering slots in the current gear are matched with the radial movement distance and the circumferential rotation angle of the base 4. Specifically, each metering slot comprises 5 round metering holes (i, ii, iii, iv, v) with chamfers penetrating through the metering piece 2, the hole diameters of the metering holes are gradually increased or decreased at a specific distance along the radial direction of the metering piece 2, and the specific design principle can be set according to requirements. The metering unit 3 is designed into a metering hole, so that the powder 6 guided out from the powder storage part 5 can be stored more conveniently, and the metering units 3 with different pore diameters can meet the requirements of different dosages of the powder. It should be noted that the metering unit 3 is not limited to the three-step structure, and is not limited to the circular metering hole.

Referring to fig. 2, in an embodiment, the powder storage device 5 includes a hollow body 51, and a pressure device 52 and a pressure plate 53 disposed in the body 51, the pressure plate 53 is connected to a driving end of the pressure device 52, the body 51 is disposed on the base 4, a discharge hole communicated with the metering unit 3 is disposed at a bottom of the body 51, and the pressure device 52 drives the pressure plate 53 to press the powder 6 in the body 51 into the metering unit 3 through the discharge hole. The pressure piece 52 drives the pressing plate 53 to press the powder 6 in the powder storage piece 5 into the metering unit 3, so that the operation is convenient, the structure is stable, and the powder 6 can still be pressed into the metering unit 3 without adopting a specific holding posture by a user.

Specifically, the device further comprises an upper baffle 54, the body 51 is cylindrical with an open top, the pressure element 52 is an elastic element, the upper baffle 54 and the pressure plate 53 are transparent plastic elements, the upper baffle 54 is detachably arranged on the top of the body 51, the upper end of the elastic element is fixedly connected with the upper baffle 54, and the lower end of the elastic element is fixedly connected with the pressure plate 53. Specifically, the outer side of the upper baffle plate 54 is provided with external threads, the inner part of the opening end of the body 51 is provided with internal threads, and the upper baffle plate 54 is in threaded connection with the body 51 through the matching of the external threads and the internal threads. The pressure member 52 may be a spring, and in a normal use state, the spring is always in an elastic range and is always in a compression state, and can provide a thrust force for the pressure plate 53, so that the powder 6 in the body 51 can be pressed into the metering unit 3, and the specific holding posture requirement cannot be met, thereby improving the use experience. The body 51 may also be provided with graduations to allow the user to view the use of the powder 6 for timely replacement or replenishment of the powder 6.

Referring to fig. 1 and 3, the powder inhalation device further includes a collection member 60 having a hollow interior and two open ends, the collection member 60 is curved and extends along the radial direction of the housing 1, one end of the collection member 60 is communicated with the notch groove 44 and is opposite to the first end of the inhalation passage 42, and a gap of about 3mm is left between the collection member 60 and the inner bottom wall of the second housing 12 to prevent the collection member 60 from interfering with the second housing 12 when the base 4 moves. By providing the collecting member 60, the user is effectively prevented from causing leakage of powder 6 from the metering unit 3 into the interior of the housing 1 in different gripping positions. The curved collecting member 60 is effective in collecting powder 6 that has leaked out of the metering unit 3. When the user inhales, external air can enter from the end of the collecting member 60 and bring the collected powder 6 into the inhalation passage 42 and be inhaled, ensuring the accuracy of the inhaled quantity of the powder 6. In particular, the collecting member 60 may have a multi-segment direction-changing curved shape, which is formed by at least two segments of S-shaped tubular bodies connected together.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A powder inhalation device comprising:

the shell is hollow and provided with a top end and a bottom end, the bottom end is provided with a vent hole, the shell comprises a first shell and a second shell, the first shell is provided with the top end, the second shell is provided with the bottom end, the first shell is rotatably connected with the second shell, and the inner bottom wall of the first shell is provided with a guide rail in a radial extending manner;

the metering piece is arranged in the shell;

the metering units are arranged on the metering piece at intervals and have at least two sizes;

the base is arranged in the shell, is arranged on the guide rail in a sliding manner and can be driven by the first shell to rotate relative to the second shell; the base is provided with a suction inlet, the suction inlet is exposed from the top end, a suction channel is arranged in the base, the suction channel is provided with a first end and a second end which are communicated, and the second end is communicated with the suction inlet; and

the powder storage part and the first end of the suction channel are arranged on the base at intervals, and powder can be stored in the powder storage part; the base is movable relative to the second housing to place the bottom of the powder reservoir in communication with and switchable between the metering units to determine a dose of powder; after the dose is determined, the base is movable relative to the second housing to place the first end in communication with the metering unit.

2. The powder inhalation device of claim 1, wherein said first housing is hollow and open at one end, said second housing is hollow and open at one end, said open end of said first housing is opposite to and at least partially coincident with said open end of said second housing, said first housing and said second housing form a sealed chamber therebetween, and said vent is in communication with said sealed chamber; the metering piece and the base are arranged in the sealing cavity.

3. A powder inhalation device of claim 1, wherein the first housing and the second housing are cylindrical, and the inner sidewall of the first housing is circumferentially provided with a pawl and the outer sidewall of the second housing is circumferentially provided with a ratchet, the pawl engaging with the ratchet to rotatably connect the first housing and the second housing.

4. The powder inhalation device of claim 3, further comprising a sleeve-shaped fixing ring having both ends open, wherein one end of the fixing ring is detachably connected to the open end of the first housing, and a stepped groove is formed at a connection point of the fixing ring and the first housing, and the ratchet of the second housing abuts against the stepped groove.

5. The powder inhalation device of claim 1, further comprising a bracket, wherein the bracket is vertically disposed on the guide rail, the base has a chute extending therethrough along a length direction, and one end of the bracket is inserted through the chute and rotatably connected to the second housing.

6. A powder inhalation device according to claim 1, wherein said metering member has a disk shape, said plurality of metering units are arranged at intervals in a circumferential direction around the center of said metering member, and said plurality of metering units are arranged in at least two turns along circumferences having different radii, the metering units on the same circumference have the same size, and the metering units on different circumferences have different sizes.

7. The powder inhalation device of claim 1, wherein said base is provided with a notched groove in a transverse direction, said notched groove communicating with a bottom of said powder storage member and a first end of said inhalation channel, said metering member being inserted into said notched groove to enable the bottom of said powder storage member and the first end of said inhalation channel to communicate with said metering unit.

8. The powder inhalation device of claim 7, further comprising a collection member which is hollow inside and open at both ends, said collection member being curved and extending in a radial direction of said housing, one end of said collection member communicating with said notch groove and being opposite to a first end of said inhalation passage.

9. Powder inhalation device according to any of claims 1 to 8, comprising at least one of the following features:

the metering unit is a metering hole penetrating through the metering piece, and the aperture of the metering hole is gradually increased or decreased along the radial direction of the metering piece;

the powder storage part comprises a body with a hollow interior, and a pressure part and a pressure plate which are arranged in the body, the body is arranged on the base, the bottom of the body is provided with a discharge hole communicated with the metering unit, the pressure plate is connected with the driving end of the pressure part, and the pressure part drives the pressure plate to press the powder in the body into the metering unit through the discharge hole;

the top end of the shell is provided with a groove communicated with the inside, the groove is communicated with the suction inlet, and the cover plate is rotatably arranged at the groove to open or close the suction inlet.

10. A powder inhalation device according to claim 1, further comprising an air dryer disposed within the housing at the vent.

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