A dry powder inhaler

Abstract

The present invention belongs to the technical field related to medical equipment, and discloses a dry powder inhaler, which includes a housing, a first nozzle pitch adjustment mechanism, a positioning spring, and a positioning bead. The first nozzle pitch adjustment mechanism is movably disposed within the housing; the positioning spring is disposed within the first nozzle pitch adjustment mechanism; the positioning bead is partially disposed within the first nozzle pitch adjustment mechanism and contacts the positioning spring; the positioning spring is used to keep the side of the positioning bead away from the positioning spring against the inner wall of the housing; wherein one of the positioning bead is partially accommodated within the wall of the housing; and the first nozzle pitch adjustment mechanism adjusts the position of the nozzle by rotating relative to the housing. The present invention solves the problem of the nozzle angle being unadjustable.

Description

Technical Field

[0001] The present invention belongs to the technical field related to medical equipment, and more particularly, relates to a dry powder inhaler. Background Art

[0002] In the treatment of respiratory diseases such as chronic obstructive pulmonary disease, asthma and local lung infections, dry powder inhalers (DPIs) have the advantages of high drug dosage carrying capacity, high drug stability, low biological contamination, small size, and no need for user-coordinated breathing compared to liquid-based nebulizers and metered-dose inhalers. Therefore, they are highly competitive in the market.

[0003] When using a dry powder inhaler, a user places their chin against the wall of the inhaler and holds the mouthpiece with their mouth. The angle between the axis of the inhaler mouthpiece and the wall of the inhaler housing is closely related to the deposition rate of the inhaled drug in the user's oropharynx. Optimizing this angle can effectively improve the delivery efficiency of inhalable dry powder drugs deep in the lungs. However, due to individual differences in users' inhalation characteristics and respiratory tract structures, this angle varies from person to person. Existing dry powder inhalers lack the ability to adjust the mouthpiece angle, making it difficult to adapt to individual differences in inhalation characteristics and respiratory tract structures among different users. This results in the dry powder drug easily depositing in the oropharynx, reducing the drug delivery efficiency. Summary of the Invention

[0004] To address the aforementioned shortcomings and improvements in the prior art, the present invention provides a dry powder inhaler (DPI) that separates the housing from the nozzle, resolving the issue of non-adjustable nozzle angles. Furthermore, the DPI utilizes a nozzle pitch adjustment mechanism to optimize the angle between the nozzle and the outer wall, effectively reducing the deposition of dry powder drug particles in the oropharynx and thereby improving the delivery efficiency of the dry powder drug.

[0005] To achieve the above objectives, according to one aspect of the present invention, a dry powder inhaler is provided, comprising a housing, a first nozzle pitch adjustment mechanism, a positioning spring, and a positioning bead, wherein the first nozzle pitch adjustment mechanism is movably disposed within the housing; the positioning spring is disposed within the first nozzle pitch adjustment mechanism; the positioning bead is partially disposed within the first nozzle pitch adjustment mechanism and contacts the positioning spring, and the positioning spring is configured to hold a side of the positioning bead away from the positioning spring against an inner wall of the housing;

[0006] Among them, one of the positioning beads is partially accommodated in the wall of the shell; and the first nozzle pitch adjustment mechanism adjusts the position of the nozzle by rotating relative to the shell.

[0007] Furthermore, the outer shell includes a left half shell and a right half shell connected to each other, the left half shell includes a first rectangular trough body, the trough wall of the first rectangular trough body is provided with a left half opening, and the left half opening is connected to the opening of the first rectangular trough body; the bottom of the first rectangular trough body is provided with a first mounting circular hole and a plurality of first spherical pits, and the plurality of first spherical pits are evenly arranged around the central axis of the first mounting circular hole.

[0008] Furthermore, the right half shell includes a second rectangular trough body, the groove wall of the second rectangular trough body is provided with a right half opening, and the right half opening is connected to the opening of the second rectangular trough body; the bottom of the second rectangular trough body is provided with a second mounting circular hole and a plurality of second spherical pits, and the plurality of second spherical pits are evenly arranged around the central axis of the second mounting circular hole.

[0009] Furthermore, the positions of the plurality of second spherical pits respectively correspond to the positions of the plurality of first spherical pits, and the position of the first mounting circular hole corresponds to the position of the second mounting circular hole.

[0010] Furthermore, the right half opening and the left half opening are arranged opposite to each other, and the two form a rectangular opening, and the rectangular opening is used for the suction nozzle of the first suction nozzle pitch adjustment mechanism to pass through.

[0011] Furthermore, the first suction nozzle pitch adjustment mechanism is a symmetrical structure, which includes a cylinder and a suction nozzle, and the two opposite ends of the cylinder are movably connected to the inner wall of the left half shell and the inner wall of the right half shell respectively; one end of the suction nozzle is connected to the outer circumference of the cylinder, and the other end protrudes from the outer shell after passing through the rectangular opening.

[0012] Furthermore, the first suction nozzle pitch adjustment mechanism also includes two mounting shafts, which are respectively mounted on the two opposite end faces of the cylinder, and their positions correspond to the first mounting circular hole and the second mounting circular hole respectively; the two mounting shafts are respectively mounted in the first mounting circular hole and the second mounting circular hole, so that the first suction nozzle pitch adjustment mechanism is movably connected to the outer shell.

[0013] Furthermore, the two opposite end faces of the cylinder are respectively provided with a plurality of first positioning deep holes, and the plurality of first positioning deep holes are evenly arranged around the central axis of the mounting shaft; the positions of the plurality of first mounting deep holes respectively correspond to the positions of the plurality of first spherical pits or the plurality of second spherical pits.

[0014] Furthermore, the plurality of positioning springs are respectively arranged in the plurality of first positioning deep holes, a portion of the plurality of positioning beads are accommodated in the plurality of first positioning deep holes, and the positioning beads are in contact with the positioning springs; a pair of the plurality of positioning beads are respectively embedded in the first spherical pit and the second spherical pit.

[0015] Furthermore, the dry powder inhaler adjusts the stepwise adjustment increment θ by adjusting the number n of first positioning deep holes, the angular interval α between adjacent first positioning deep holes, and the angular interval β between the first spherical pit and the second spherical pit. θ, n, α, and β should satisfy the following relationship: when (α-β)×n=β, When α=β, θ=β.

[0016] In general, the above technical solutions conceived by the present invention, compared with the prior art, provide a dry powder inhaler with the following advantages:

[0017] 1. After the dry powder inhaler adopts the nozzle pitch adjustment mechanism, the angle between the nozzle and the outer wall surface is optimized to effectively reduce the deposition of dry powder drug particles in the oropharynx, thereby improving the delivery efficiency of dry powder drugs.

[0018] 2. Install the positioning spring and positioning bead in the positioning deep hole on the side of the nozzle pitch adjustment mechanism. The nozzle pitch adjustment mechanism is installed in the inhaler housing. The user can adjust the angle between the nozzle and the inhaler housing in steps. For example, if the increment of the adjustment amount is 5°, the angle between the nozzle and the inhaler housing can be adjusted to 90°, 95°, 100°, 105°, etc., that is, it can be adjusted in multiples of 5° within the limit, of which 90° is the neutral position, that is, the axis of the nozzle and the wall of the inhaler housing are perpendicular to each other; the value of this angle is defined as the angle between the axis of the nozzle and the wall of the inhaler located on the upper side of the nozzle.

[0019] 3. The side of the inhaler housing where the mouthpiece extends is a long wall, the length of which can cover the user's mouth and chin at the same time; when the user holds the inhaler mouthpiece in his mouth, the user's chin fits against the wall, which can achieve the positioning of the dry powder inhaler, ensuring that the user's posture remains consistent every time he uses it, and the relative position of the inhaler and oropharynx remains the same.

[0020] 4. The present invention has a simple structure, fewer parts, low manufacturing and assembly costs, good durability, and is convenient for users to adjust the angle of the suction nozzle, which can effectively improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of an explosion of a dry powder inhaler provided in Example 1 of the present invention;

[0022] Figure 2 yes Figure 1Schematic diagram of the structure of the left half shell of the dry powder inhaler;

[0023] Figure 3 yes Figure 1 Schematic diagram of the pitch adjustment mechanism of the first nozzle of the dry powder inhaler;

[0024] Figure 4 yes Figure 1 Schematic diagram of the right half shell of the dry powder inhaler;

[0025] Figure 5 1 is a schematic diagram of an explosion of a dry powder inhaler provided in Example 2 of the present invention;

[0026] Figure 6 yes Figure 5 Schematic diagram of the pitch adjustment mechanism of the nozzle of the dry powder inhaler;

[0027] Figure 7 yes Figure 5 A schematic structural diagram of the housing of the dry powder inhaler;

[0028] Figure 8 This is a schematic diagram of the principle of step-by-step angle adjustment;

[0029] Figure 9 (a), (b), (c), and (d) are side X-ray images of the dry powder inhaler provided by the present invention when the angles between the nozzle axis and the inhaler wall are adjusted to 90°, 80°, 70°, and 60°, respectively;

[0030] Figure 10 (a), (b), (c), and (d) are frontal three-dimensional reconstructed images of the dry powder inhaler provided by the present invention when the angles between the nozzle axis and the inhaler wall are adjusted to 90°, 80°, 70°, and 60°, respectively;

[0031] Figure 11 (a), (b), (c), and (d) are side X-ray images of the dry powder inhaler provided by the present invention when the angles between the nozzle axis and the inhaler wall are adjusted to 90°, 80°, 70°, and 60°, respectively;

[0032] Figure 12 (a), (b), (c), and (d) are diagrams of the respiratory fluid velocity field when the angles between the nozzle axis and the inhaler wall of the dry powder inhaler provided by the present invention are adjusted to 90°, 80°, 70°, and 60°, respectively.

[0033] In all the drawings, the same figure marks are used to represent the same elements or structures, where: 100-left half shell, 200-first suction nozzle pitch adjustment mechanism, 300-right half shell, 400-positioning bead, 500-positioning spring, 600-fixing screw, 700-second suction nozzle pitch adjustment mechanism, 800-housing, 900-plug screw, 101-screw mounting column, 102-first spherical pit, 103-first mounting circular hole, 201-first suction nozzle, 202-mounting shaft, 203-first positioning deep hole, 302-second spherical pit, 303-second mounting circular hole, 701-second suction nozzle, 702-plug screw threaded hole, 703-second positioning deep hole, 801-third spherical pit, 802-third mounting circular hole. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0035] The present invention provides a dry powder inhaler that separates the housing and the mouthpiece, solving the problem of the non-adjustable mouthpiece angle. The angle of the mouthpiece can be adjusted according to user needs, and the adjustment function is step-by-step. The user can accurately read and record the angle of the mouthpiece as needed, making it convenient to adjust the mouthpiece to the same angle the next time it is used. Furthermore, one side of the inhaler housing 800 extends into a long wall, the length of which can cover both the user's mouth and chin. When the user holds the mouthpiece in their mouth, the user's chin fits against the wall, enabling the inhaler to be positioned correctly. This ensures that the user maintains a consistent posture each time the inhaler is used, and the relative position of the inhaler and the oropharynx remains the same. Furthermore, a recess is permitted on the long wall to assist in positioning the user's chin.

[0036] The dry powder inhaler also adopts a nozzle pitch adjustment mechanism, which can effectively reduce the deposition of dry powder medicine in the oropharynx by optimizing the angle between the nozzle and the wall of the shell 800, thereby improving the delivery efficiency of dry powder medicine.

[0037] Example 1

[0038] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 4Embodiment 1 of the present invention provides a dry powder inhaler, comprising a housing 800, a first nozzle pitch adjustment mechanism 200, a positioning spring 500, and a positioning bead 400. The first nozzle pitch adjustment mechanism is movably disposed within the housing 800. The positioning spring 500 is disposed within the first nozzle pitch adjustment mechanism 200. The positioning bead 400 is partially disposed within the first nozzle pitch adjustment mechanism 200 and contacts the positioning spring 500. The positioning spring 500 is used to keep the side of the positioning bead 400 away from the positioning spring 500 against the inner wall of the housing 800. The first nozzle pitch adjustment mechanism 200 adjusts the position of the nozzle by rotating.

[0039] The housing 800 comprises a connected left half 100 and a right half 300. The left half 100 comprises a first rectangular trough and a screw mounting post 101, one end of which is connected to the bottom surface of the first rectangular trough. The screw mounting post 101 is partially housed within the first rectangular trough. In this embodiment, there are three screw mounting posts 101, two of which are located at opposite ends of the first rectangular trough, and the remaining screw mounting post 101 is located in the middle of the first rectangular trough. It is understood that in other embodiments, the number of screw mounting posts 101 can be increased or decreased as needed.

[0040] The first rectangular trough has a rectangular left half opening in the wall, which communicates with the opening of the first rectangular trough. The bottom of the first rectangular trough has a first circular mounting hole 103 and a plurality of first spherical recesses 102, which are evenly spaced around the central axis of the first circular mounting hole 103. The angular spacing between adjacent first spherical recesses 102 is set based on the amount of adjustment for the stepped angle adjustment.

[0041] The right half shell 300 includes a second rectangular trough body, the trough wall of which is provided with a rectangular right half opening, which is connected to the opening of the second rectangular trough body. The bottom of the second rectangular trough body is provided with a second mounting hole 303 and a plurality of second spherical pits 302, which are evenly arranged around the central axis of the second mounting hole 303. The positions of the plurality of second spherical pits 302 correspond to the positions of the plurality of first spherical pits 102, and the position of the first mounting hole 103 corresponds to the position of the second mounting hole 303. The bottom of the second rectangular trough body is also provided with three screw holes 301, and the positions of the three screw holes 301 correspond to the positions of the three screw mounting posts 101.

[0042] The right half opening and the left half opening are arranged opposite each other and form a rectangular opening for the nozzle to pass through. Three fixing screws 600 are respectively passed through the three screw holes 301 and then threadedly connected to the three screw mounting posts 101, thereby connecting the right half shell 300 and the left half shell 100 together.

[0043] The first nozzle pitch adjustment mechanism 200 is a symmetrical structure, comprising a cylindrical body, a first nozzle 201, and two mounting shafts 202. One end of the first nozzle 201 is connected to the outer circumference of the cylindrical body, and the other end passes through the rectangular opening and protrudes from the housing 800. The two mounting shafts 202 are respectively mounted on the two opposite end faces of the cylindrical body, and their positions correspond to the first mounting hole 103 and the second mounting hole 303, respectively. Specifically, the two mounting shafts 202 are respectively mounted in the first mounting hole 103 and the second mounting hole 303, so that the first nozzle pitch adjustment mechanism 200 is movably connected to the housing 800.

[0044] The two opposite end surfaces of the cylinder are each provided with a plurality of first positioning deep holes 203, which are evenly arranged around the central axis of the mounting shaft 202. The positions of the plurality of first mounting deep holes correspond to the positions of the plurality of first spherical dimples 102 or the plurality of second spherical dimples 302.

[0045] The plurality of positioning springs 500 are respectively disposed in the plurality of first positioning deep holes 203 , and a portion of the plurality of positioning beads 400 are accommodated in the plurality of first positioning deep holes 203 , and the positioning beads 400 are in contact with the positioning springs 500 .

[0046] In this embodiment, approximately one-third of the volume of the positioning beads 400 protrudes from the first nozzle pitch adjustment mechanism 200. A pair of the plurality of positioning beads 400 is embedded in the first spherical recess 102 and the second spherical recess 302, respectively. The remaining positioning beads 400 are in contact with the wall surface of the housing 800 near the first spherical recess 102 and the second spherical recess 302. The positioning spring 500 pushes the corresponding positioning beads 400 toward the first spherical recess 102 or the second spherical recess 302. To disengage the pair of positioning beads 400 embedded in the first spherical recess 102 and the second spherical recess 302, they need to overcome a certain resistance.

[0047] See also Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12Since the diameter of the positioning beads 400 and the outer diameter of the positioning spring 500 are slightly smaller than the diameter of the first positioning deep hole 203, this resistance will act on the side wall of the first positioning deep hole 203 through the positioning beads 400, and then act on the first nozzle pitch mechanism, while the remaining positioning beads 400 will not be subject to such resistance. This resistance can determine the angle of the first nozzle 201. When adjusting the angle of the first nozzle pitch adjustment mechanism 200, after overcoming the resistance of the first spherical pit 102 and the second spherical pit 302, each time a certain angle is adjusted, that is, the angle adjustment amount is a multiple of the adjustment increment, another pair of positioning beads 400 will be embedded in the first spherical pit 102 and the second spherical pit 302 to complete the new positioning. Under the action of the first nozzle pitch adjustment mechanism 200, the pitch angle of the first nozzle 201 can be adjusted in steps.

[0048] To change the stepwise angle adjustment increment θ, the number n of circumferentially evenly spaced first positioning deep holes 203 on the first nozzle pitch adjustment mechanism 200, the angular spacing α between the first positioning deep holes 203, and the angular spacing β between the circumferentially evenly spaced first spherical dimples 102 and second spherical dimples 302 can be adjusted. θ, n, α, and β should satisfy the following relationship: (α - β) × n = β. When α=β, θ=β. For example Figure 8 In the example, n=4, α=25°, and β=20°, the angle adjustment increment is 5°, and the angle between the first suction nozzle 201 and the inhaler housing 800 can be adjusted to 90°, 100°, 110°, 120°, etc., i.e., multiples of 5° can be adjusted within the limit. This structure not only allows for flexible adjustment of the adjustment increment θ, but also, when θ is small, increases the number n of groups of the first positioning deep holes 203, thereby preventing the angular spacing β between the first spherical pit 102 and the second spherical pit 302 from being too small or even overlapping.

[0049] In this embodiment, the right half shell 300 and the left half shell 100 are long enough to cover the user's mouth and chin. In this way, when the user uses the inhaler, the first mouthpiece 201 is placed in the mouth, and the chin fits against the wall of the outer shell 800, thereby achieving the positioning of the inhaler.

[0050] Example 2

[0051] See also Figure 5 、 Figure 6 and Figure 7Embodiment 1 of the present invention provides a dry powder inhaler, comprising a housing 800, a second nozzle pitch adjustment mechanism 700, a positioning spring 500, and a positioning bead 400. The second nozzle pitch adjustment mechanism is movably disposed within the housing 800. The positioning spring 500 is disposed within the first nozzle pitch adjustment mechanism 200. The positioning bead 400 is partially disposed within the first nozzle pitch adjustment mechanism 200 and contacts the positioning spring 500. The positioning spring 500 is used to keep the positioning bead 400 against the inner wall of the housing 800, away from the positioning spring 500. The second nozzle pitch adjustment mechanism 700 adjusts the position of the nozzle by rotating.

[0052] The shell 800 is an integrated shell structure with a rectangular opening. An inner wall of the shell 800 is provided with a fourth mounting hole and a plurality of fourth spherical pits, and the plurality of fourth spherical pits are evenly arranged around the central axis of the fourth mounting hole. The angular interval between adjacent fourth spherical pits is set according to the adjustment amount of the step-by-step angle adjustment. Another inner wall of the shell 800 is provided with a third mounting hole and a plurality of third spherical pits 801, and the plurality of third spherical pits 801 are evenly arranged around the central axis of the third mounting hole 802. The positions of the plurality of third spherical pits 801 correspond to the positions of the plurality of fourth spherical pits, and the position of the fourth mounting hole corresponds to the position of the third mounting hole 802.

[0053] The second nozzle pitch adjustment mechanism 700 is a symmetrical structure, which includes a cylinder and a second nozzle 701 . One end of the second nozzle 701 is connected to the outer circumference of the cylinder, and the other end protrudes from the housing 800 .

[0054] The two opposite end surfaces of the cylinder are further provided with a plurality of second positioning deep holes 703, each of which is evenly spaced around the central axis of the mounting shaft 202. The positions of the plurality of second mounting deep holes correspond to the positions of the plurality of third spherical recesses 801 or the plurality of fourth spherical recesses.

[0055] The two opposite surfaces of the cylinder are also provided with screw thread holes 702 respectively. Two screws 900 pass through the third mounting hole 802 and the fourth mounting hole respectively and form a threaded connection with the two screw thread holes, so that the second suction nozzle pitch adjustment mechanism 700 is connected to the shell 800.

[0056] The plurality of positioning springs 500 are respectively disposed within the plurality of second positioning deep holes 703, and a portion of the plurality of positioning beads 400 is accommodated within the plurality of second positioning deep holes 703, with the positioning beads 400 in contact with the positioning springs 500. In this embodiment, approximately one-third of the volume of the positioning beads 400 protrudes from the second nozzle pitch adjustment mechanism 700. A pair of the plurality of positioning beads 400 are respectively embedded in the third spherical pit 801 and the fourth spherical pit, while the remaining positioning beads 400 are in contact with the wall surface of the housing 800 near the third spherical pit 801 and the fourth spherical pit. The positioning springs 500 push the corresponding positioning beads 400 toward the third spherical pit 801 or the fourth spherical pit. If the pair of positioning beads 400 embedded in the third spherical pit 801 and the fourth spherical pit want to escape from the third spherical pit 801 and the fourth spherical pit, a certain amount of resistance is required.

[0057] See also Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12 Since the diameter of the positioning beads 400 and the outer diameter of the positioning spring 500 are slightly smaller than the diameter of the second positioning deep hole 703, this resistance will act on the side wall of the second positioning deep hole 703 through the positioning beads 400, and then act on the second suction nozzle pitch mechanism, while the remaining positioning beads 400 will not be subject to such resistance. This resistance can position the angle of the second suction nozzle 701. When adjusting the angle of the second suction nozzle pitch adjustment mechanism 700, after overcoming the resistance of the third spherical pit 801 and the fourth spherical pit, each time a certain angle is adjusted, that is, the angle adjustment amount is a multiple of the adjustment increment, another pair of positioning beads 400 will be embedded in the third spherical pit 801 and the fourth spherical pit to complete the new positioning. Under the action of the second suction nozzle pitch adjustment mechanism 700, the pitch angle of the second suction nozzle 701 can be adjusted in steps.

[0058] To change the stepwise angle adjustment increment θ, the number n of circumferentially evenly spaced second positioning deep holes 703 on the second nozzle pitch adjustment mechanism 700, the angular spacing α between the second positioning deep holes 703, and the angular spacing β between the circumferentially evenly spaced third and fourth spherical recesses 801 can be adjusted. θ, n, α, and β should satisfy the following relationship: (α - β) × n = β. When α=β, θ=β. For example Figure 8If n=4, α=25°, and β=20°, the angle adjustment increment is 5°, and the angle between the second suction nozzle 701 and the inhaler housing 800 can be adjusted to 90°, 100°, 110°, 120°, etc., i.e., multiples of 5° can be adjusted within the limit. This structure not only allows for flexible adjustment of the adjustment increment θ, but also, when θ is small, increases the number n of groups of the second positioning deep holes 703 to prevent the angular interval β between the third and fourth spherical pits 801 from being too small or even overlapping.

[0059] In this embodiment, the right half shell 300 and the left half shell 100 are long enough to cover the user's mouth and chin. In this way, when the user uses the inhaler, the second nozzle 701 is placed in the mouth, and the chin fits against the wall of the outer shell 800, thereby achieving the positioning of the inhaler.

[0060] In another embodiment, the housing includes a connected left and right half-shells, the left half-shell including a third rectangular trough and a screw mounting post having one end connected to the bottom surface of the third rectangular trough, with the screw mounting post partially housed within the third rectangular trough. In this embodiment, there are three screw mounting posts, two of which are located at opposite ends of the third rectangular trough, and the remaining screw mounting post is located in the middle of the third rectangular trough. It will be understood that in other embodiments, the number of screw mounting posts may be increased or decreased based on actual needs.

[0061] The third rectangular trough has a first rectangular half-opening formed in the wall thereof, the first half-opening communicating with the opening of the third rectangular trough. A fourth circular mounting hole and a plurality of fourth spherical recesses are formed at the bottom of the third rectangular trough. The plurality of fourth spherical recesses are evenly spaced around the central axis of the fourth circular mounting hole. The angular spacing between adjacent fourth spherical recesses is set based on the amount of adjustment for the stepped angle adjustment.

[0062] The right half shell includes a fourth rectangular trough body, and the trough wall of the fourth rectangular trough body is provided with a rectangular second half opening, and the second half opening is connected to the opening of the fourth rectangular trough body. The bottom of the fourth rectangular trough body is provided with a third mounting circular hole and a plurality of third spherical pits, and the plurality of third spherical pits are evenly arranged around the central axis of the third mounting circular hole. The positions of the plurality of third spherical pits respectively correspond to the positions of the plurality of fourth spherical pits, and the position of the fourth mounting circular hole corresponds to the position of the third mounting circular hole. The bottom of the fourth rectangular trough body is also provided with three screw holes, and the positions of the three screw holes respectively correspond to the positions of the three screw mounting posts.

[0063] The first half opening and the second half opening are arranged opposite to each other and form a rectangular opening. Three fixing screws pass through the three screw holes and form threaded connections with the three screw mounting posts, so that the right half shell and the left half shell are connected together.

[0064] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dry powder inhaler, characterized in that: The dry powder inhaler includes a housing, a first nozzle pitch adjustment mechanism, a positioning spring, and a positioning bead, wherein the first nozzle pitch adjustment mechanism is movably disposed within the housing; the positioning spring is disposed within the first nozzle pitch adjustment mechanism; the positioning bead is partially disposed within the first nozzle pitch adjustment mechanism and contacts the positioning spring, and the positioning spring is used to keep the side of the positioning bead away from the positioning spring against the inner wall of the housing; Wherein, one of the positioning beads is accommodated in the wall of the housing; the first nozzle pitch adjustment mechanism adjusts the position of the nozzle by rotating relative to the housing; The outer shell includes a left half shell and a right half shell connected to each other, the left half shell includes a first rectangular trough body, the trough wall of the first rectangular trough body is provided with a left half opening, the left half opening is connected to the opening of the first rectangular trough body; the bottom of the first rectangular trough body is provided with a first mounting hole and a plurality of first spherical pits, the plurality of first spherical pits are evenly arranged around the central axis of the first mounting hole; The right half shell includes a second rectangular trough body, and the groove wall of the second rectangular trough body is provided with a right half opening, and the right half opening is connected to the opening of the second rectangular trough body; the bottom of the second rectangular trough body is provided with a second mounting circular hole and a plurality of second spherical pits, and the plurality of second spherical pits are evenly arranged around the central axis of the second mounting circular hole; the right half opening is arranged opposite to the left half opening, and the two form a rectangular opening, and the rectangular opening is used for the suction nozzle of the first suction nozzle pitch adjustment mechanism to pass through; the first suction nozzle pitch adjustment mechanism is a symmetrical structure, which includes a cylinder and a suction nozzle, and the opposite ends of the cylinder are movably connected to the inner wall of the left half shell and the inner wall of the right half shell respectively; one end of the suction nozzle is connected to the outer circumference of the cylinder, and the other end protrudes from the outer shell after passing through the rectangular opening; the first suction nozzle pitch adjustment mechanism is a symmetrical structure, which includes a cylinder and a suction nozzle, and the opposite ends of the cylinder are respectively movably connected to the inner wall of the left half shell and the inner wall of the right half shell; one end of the suction nozzle is connected to the outer circumference of the cylinder, and the other end protrudes from the outer shell after passing through the rectangular opening; A nozzle pitch adjustment mechanism also includes two mounting shafts, which are respectively mounted on the two opposite end faces of the cylinder, and their positions correspond to the first mounting circular hole and the second mounting circular hole respectively; the two opposite end faces of the cylinder are also respectively provided with a plurality of first positioning deep holes, and the plurality of first positioning deep holes are evenly arranged around the central axis of the mounting shaft; the positions of the plurality of first positioning deep holes respectively correspond to the positions of the plurality of first spherical pits or the plurality of second spherical pits; the plurality of positioning springs are respectively arranged in the plurality of first positioning deep holes, and a part of the plurality of positioning beads are accommodated in the plurality of first positioning deep holes, and the positioning beads are in contact with the positioning springs; a pair of the plurality of positioning beads are respectively embedded in the first spherical pit and the second spherical pit.

2. The dry powder inhaler according to claim 1, wherein: The positions of the plurality of second spherical recesses respectively correspond to the positions of the plurality of first spherical recesses, and the position of the first mounting circular hole corresponds to the position of the second mounting circular hole.

3. The dry powder inhaler according to claim 1, wherein: The two mounting shafts are respectively mounted in the first mounting circular hole and the second mounting circular hole, so that the first suction nozzle pitch adjustment mechanism is movably connected to the housing.

4. The dry powder inhaler according to claim 1, wherein: The dry powder inhaler is configured to adjust the number of groups of the first positioning deep holes. , the angular spacing between adjacent first positioning deep holes , the angular spacing between the first spherical dimple and the second spherical dimple To adjust the adjustment increment of its step adjustment , The following relationship should be satisfied: hour, ;when hour, .

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