Inhaler

Abstract

An inhaler according to one embodiment includes a housing having one side, another side opposite the one side, and a plurality of side surfaces connecting the one side and the other side; a mouthpiece disposed on one side of the housing; a reservoir disposed inside the housing for storing an inhalable composition; a nozzle extending from the mouthpiece to the reservoir; a needle valve movably disposed inside the nozzle and operating in a first state to seal the nozzle or a second state to open the nozzle; and a sealing member fixedly installed on the nozzle; in the first state, a first gap may be formed between the needle valve and the nozzle, and in the second state, a second gap may be formed between the needle valve and the sealing member.

Description

[Technical Field]

[0001] The inhaler is disclosed. [Background technology]

[0002] In general, an inhaler is a device used to inhale a composition such as a drug in a liquid or gaseous state through the oral or nasal cavity during the inhalation process. Such an inhaler includes a container containing an inhalable composition, and the composition is ejected from the container through a narrow tube and finally into the oral or nasal cavity through an inhalation port, where it is inhaled by the user.

[0003] The above-mentioned background art was possessed or acquired by the inventors in the process of deriving the contents of the disclosure of this application, and cannot necessarily be said to be publicly known art that was disclosed to the general public prior to the filing of this application. [Prior art document] [Patent documents] [Patent Document 1] Korean Patent Registration No. 10-1759972 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of one embodiment is to provide an inhaler equipped with technology that enables the flow path through which the aerosol is emitted to be separated into two spaces with different cross-sectional areas by the operation of a valve, and that derives the aerosol formation conditions by identifying the appropriate section of the two separated spaces, thereby enabling the uniform emission of the sprayed aerosol.

[0005] The problems to be solved in the embodiments are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0006] In one embodiment to achieve the above object, an inhaler includes a housing having one side, another side opposite the one side, and a plurality of side surfaces connecting the one side and the other side; a mouthpiece disposed on one side of the housing; a reservoir disposed inside the housing for storing an inhalable composition; a nozzle extending from the mouthpiece to the reservoir; a needle valve movably disposed inside the nozzle and operating in a first state to seal the nozzle or a second state to open the nozzle; and a sealing member fixedly installed on the nozzle; wherein a first gap is formed between the needle valve and the nozzle in the first state, and a second gap is formed between the needle valve and the sealing member in the second state.

[0007] According to one aspect, the first state may be defined as a state in which the needle valve contacts the sealing member, and the second state may be defined as a state in which the needle valve does not contact the sealing member.

[0008] According to one aspect, the first spacing may be smaller than the second spacing.

[0009] According to one aspect, the nozzle may include a first nozzle portion adjacent to the mouthpiece; and a second nozzle portion adjacent to the reservoir; and the first nozzle portion may be formed to have a smaller diameter than the second nozzle portion.

[0010] According to one aspect, the needle valve includes a first valve portion formed at a tip thereof and vertically reciprocating between the first nozzle portion and the second nozzle portion in a first direction from one side of the housing to the other side or a second direction from one side of the housing to the other side; and a second valve portion formed below the first valve portion, wherein the first valve portion may be formed to have a smaller diameter than the second valve portion.

[0011] According to one aspect, the first valve portion may be formed to have a smaller diameter than the first nozzle portion.

[0012] According to one aspect, the first valve portion may not contact the first nozzle portion in the first state or the second state, and the second valve portion may contact the sealing member in the first state but not contact the sealing member in the second state.

[0013] According to one aspect, the first gap may be formed between the first valve portion and the first nozzle portion, and the second gap may be formed between the first valve portion and the sealing member.

[0014] In one aspect, the second gap may allow movement of the inhalable composition ejected from the reservoir, and the first gap may control the size of particles of the inhalable composition passing through the second gap and allow movement to the mouthpiece.

[0015] According to one aspect, the first gap may be formed to be 0.015 to 0.03 mm.

[0016] According to one aspect, the device may further include a piston having the needle valve attached to one side thereof and capable of vertical reciprocating motion in a first direction from one side of the housing to the other side or a second direction from one side of the housing to the other side; and a spring installed in a preloaded state below the piston; wherein when no inhalation force is applied through the mouthpiece, the spring pushes the piston in the first direction to maintain the first state, and when inhalation force is applied through the mouthpiece, the piston overcomes the preload of the spring and moves in the second direction to switch to the second state.

[0017] According to one aspect, the nozzle may further include a passage formed inside the housing and extending from one side of the mouthpiece to a lower portion of the piston, and the passage may transmit a suction force applied to the mouthpiece to the piston.

[0018] According to one aspect, the device may further include a negative pressure forming unit that forms a space between the piston and the passage, and the negative pressure forming unit may generate negative pressure by the suction force to induce the piston to move in the second direction. [Effects of the Invention]

[0019] According to one embodiment of the inhaler, the flow path through which the aerosol is released is separated into two spaces with different cross-sectional areas by the operation of the valve, and the appropriate sections of the two separated spaces are identified to derive the aerosol formation conditions, thereby enabling the uniform release of the sprayed aerosol.

[0020] The effects of the inhaler according to one embodiment are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a perspective view of an inhaler according to one embodiment. [Figure 2] FIG. 1 is a cross-sectional view of an inhaler according to one embodiment. [Figure 3] FIG. 1 is a cross-sectional view of an inhaler according to one embodiment. [Figure 4] The drawings show the inhaler in a first state and a second state. The following drawings attached to this specification illustrate a preferred embodiment of the present invention and, together with the detailed description of the invention, serve to further understand the technical concept of the present invention, so the present invention should not be interpreted as being limited to the details shown in such drawings. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, the embodiments will be described in detail with reference to the drawings. When referring to components in each drawing, please note that the same components are designated by the same reference numerals as much as possible, even if they are displayed in different drawings. Furthermore, in the description of the embodiments, if a detailed description of related known structures or functions is deemed to hinder understanding of the embodiments, the detailed description will be omitted.

[0023] Furthermore, in describing components of the embodiments, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are merely used to distinguish the component from other components, and do not limit the essence, procedure, or order of the components. When a component is described as being "coupled," "coupled," or "connected" to another component, it should be understood that the component may be directly coupled or connected to the other component, but that there may also be another component "coupled," "coupled," or "connected" between the components.

[0024] Components having functions common to those included in any of the embodiments will be described using the same names in other embodiments. Unless otherwise specified, the description of one embodiment is applicable to the other embodiments, and detailed description will be omitted to the extent that it overlaps.

[0025] FIG. 1 is a perspective view of an inhaler 10 according to one embodiment.

[0026] FIG. 2 is a cross-sectional view of an inhaler 10 according to one embodiment.

[0027] FIG. 3 is a cross-sectional view of an inhaler 10 according to one embodiment.

[0028] FIG. 4 shows the inhaler 10 in a first and second condition.

[0029] Referring to FIG. 1, an inhaler 10 according to one embodiment includes a housing 101 and a mouthpiece 102.

[0030] Housing 101 includes a first surface formed on one side, a second surface opposite to the first surface, and a plurality of side surfaces connecting the first surface and the second surface. The first surface of housing 101 is, for example, a surface located at the top of housing 101, and the second surface is, for example, a bottom surface of housing 101. Hereinafter, the direction from the second surface to the first surface is defined as a first direction, and the direction from the first surface to the second surface is defined as a second direction.

[0031] The mouthpiece 102 may be disposed on a first surface of the housing 101. A user can inhale the inhalable composition contained in the inhaler 10 through the mouthpiece 102. In this case, the user can inhale the composition, for example, in an aerosol state, or in the form of a powder. Hereinafter, an inhaler 10 according to one embodiment will be described using an inhaler 10 that sprays the inhalable composition in an aerosol state as an example.

[0032] 2, in one embodiment of the inhaler 10, a canister 200 containing an inhalable composition is attached to a housing 101, and a certain amount of the composition in the canister 200 may be filled into a reservoir 103. A user can visually check the remaining amount of the composition stored in the reservoir 103 through a display window (not shown) provided in the housing 101. A filling lever 300 is provided that can be pressed by a user to fill the composition stored in the canister 200 into the reservoir 103. The filling lever 300 may be located on a second surface of the housing 101, and when a user presses the filling lever 300, the filling lever 300 pushes the bottom of the canister 200 in a first direction, connecting the nozzle of the canister 200 to the reservoir 103, and the composition moves from the canister 200 to the reservoir 103 through the nozzle. In one embodiment, inhaler 10 may also include a counter (not shown) that counts the number of refills in conjunction with the up and down movement of canister 200 when refilling reservoir 103, and a display window (not shown) that displays the remaining amount of composition in canister 200. The composition stored in reservoir 103 is sprayed in an aerosol state when the user applies inhalation force to mouthpiece 102, and at this time, inhale interlocking valve 105 that opens and closes reservoir 103 is actuated by the inhalation force, and the opening and closing movement of inhale interlocking valve 105 may be controlled by piston 106. In addition, reservoir 103 may be provided with a relief valve (not shown), and a relief vent hole 400 may be formed on the first surface of housing 101. The relief valve is linked to the filling lever 300 via a relief bar (not shown) and a relief bar moving protrusion (not shown), and the relief valve opens first to discharge residual gas from the reservoir 103 just before the filling lever 300 pushes the canister 200 up in the first direction to fill the reservoir 103. Furthermore, the inhaler 10 according to one embodiment may be provided with a cover 500 and a locking device 600 that prevent the canister 200 from coming off.

[0033] The inhaler 10 described above has a needle valve system applied to the inside of the housing 101, which was developed to solve problems that occur when aerosol is sprayed into the user's nasal or oral cavity. This needle valve system will be described in detail below with reference to Figures 3 and 4.

[0034] Generally, when a pinch valve type inhaler is used, when aerosol is sprayed through a nozzle with a circular cross-sectional area, the sprayed aerosol particles may be too large and wet the inside of the user's mouth. Also, when the end of the spray nozzle is located inside the mouth, the aerosol may hit the mouth hard during spraying. To solve these problems, the present invention uses a needle valve type.

[0035] Referring to FIG. 3, the inhaler 10 according to one embodiment may further include a reservoir 103, a nozzle 104, and a needle valve 105.

[0036] Reservoir 103 may be disposed within housing 101. Reservoir 103 may store an inhalable composition.

[0037] The nozzle 104 may connect the mouthpiece 102 to the reservoir 103. The nozzle 104 may be provided as a tube extending from the mouthpiece 102 to the reservoir 103.

[0038] The needle valve 105 may be movably disposed inside the nozzle 104. For example, the needle valve 105 can move up and down inside the nozzle 104. Such a needle valve 105 can open or close the nozzle 104 depending on its position inside the nozzle 104. That is, the needle valve 105 can open the nozzle 104 so that the mouthpiece 102 and the reservoir 103 communicate with each other, or close the nozzle 104 so that the mouthpiece 102 and the reservoir 103 are separated from each other.

[0039] In the needle valve method using such a needle valve 105, the needle-shaped valve 105 is located in the middle of the nozzle 104, so that the cross-sectional area for spraying the aerosol can be maintained in a doughnut shape. Also, by spraying the aerosol in a narrower section for the same spray area, finer particles can be formed, and since the nozzle 104 for spraying the aerosol is located at the lower end of the mouthpiece 102 and is far from the oral cavity, the phenomenon of hitting or wetting the inside of the oral cavity can be reduced.

[0040] The nozzle 104 can be switched between a first state and a second state by the needle valve 105. In the first state, the nozzle 104 is sealed, and in the second state, the nozzle 104 is opened. In the first state, the mouthpiece 102 and the reservoir 103 can be separated from each other. In the second state, the mouthpiece 102 and the reservoir 103 can be connected to each other. That is, in the second state, the inhalable composition stored in the reservoir 103 can be ejected into the mouthpiece 102 through the nozzle 104 as shown by the arrow.

[0041] Alternatively, the needle valve 105 may be operated in a suction-linked manner.

[0042] Specifically, when no inhalation force is applied to the mouthpiece 102, the needle valve 105 can maintain the nozzle 104 in the first state. When inhalation force is applied through the mouthpiece 102, the needle valve 105 can move in the second direction to switch the nozzle 104 to the second state.

[0043] With further reference to FIG. 3, the inhaler 10 according to one embodiment may further include a piston 106, a spring 107, a passageway 108, and a negative pressure creating portion 109.

[0044] The piston 106 may be disposed inside the housing 101, and one end of the needle valve 105 may be coupled to one surface of the piston 106. The piston 106 may reciprocate vertically within the cylinder.

[0045] The spring 107 may be installed under the piston 106. In this case, the spring 107 may be installed in a preloaded state.

[0046] The passage 108 may be formed inside the housing 101. The passage 108 may connect the mouthpiece 102 and the piston 106. Specifically, one end of the passage 108 may be connected to one side of the mouthpiece 102, and the other end may be connected to the bottom of the piston 106. In this case, one end of the passage 108 may be connected to the mouthpiece 102 at a position away from the position where the nozzle 104 is connected to the mouthpiece 102. Such a passage 108 may transmit the suction force applied to the mouthpiece 102 to the piston 106.

[0047] The negative pressure generating unit 109 may be formed between the piston 106 and one end of the passage 108 connected to the piston 106. The negative pressure generating unit 109 may form a space between the piston 106 and the passage 108. When an inhalation force is applied to the mouthpiece 102, the inhalation force transmitted through the passage 108 can reach the negative pressure generating unit 109, and the negative pressure generating unit 109 can generate negative pressure. As a result, the negative pressure generating unit 109 can induce the piston 106 to move in the second direction.

[0048] Consequently, when no inhalation force is applied to mouthpiece 102, spring 107 pushes piston 106 up in the first direction, maintaining needle valve 105 and nozzle 104 in the first state. On the other hand, when inhalation force is applied to mouthpiece 102, the inhalation force is transmitted to negative pressure generating unit 109 through passage 108, and the negative pressure generated in negative pressure generating unit 109 causes piston 106 to move in the second direction, overcoming the preload of spring 107. As a result, needle valve 105 moves in the second direction, and nozzle 104 is switched to the second state.

[0049] Below, with reference to Figure 4, we will explain in more detail the nozzle 104 and needle valve 105 in the first and second states, and will explain in detail the configuration in which the operation of needle valve 105 forms two gaps G1 and G2 with different cross-sectional areas on nozzle 104 to control the amount of aerosol sprayed.

[0050] FIG. 4(a) shows the inhaler 10 in a first state, and FIG. 4(b) shows the inhaler 10 in a second state.

[0051] In the first state, the nozzle 104 and needle valve 105 may be in contact with each other, isolating the mouthpiece 102 and the reservoir 103 .

[0052] In the second state, the needle valve 105 may be moved in the second direction so that the nozzle 104 and the needle valve 105 are no longer in contact with each other, and the mouthpiece 102 and the reservoir 103 may be in communication with each other through the nozzle 104. This allows the inhalable composition in the reservoir 103 to be sprayed from the reservoir 103 to the outside through the mouthpiece 102.

[0053] Specifically, the nozzle 104 may include a first nozzle portion 1041 and a second nozzle portion 1042 .

[0054] The first nozzle portion 1041 may be the portion adjacent to the mouthpiece 102 .

[0055] The second nozzle portion 1042 may be, for example, a portion located below the first nozzle portion 1041 and adjacent to the reservoir 103 .

[0056] Such a nozzle 104 may be formed such that the first nozzle portion 1041 has a smaller diameter than the second nozzle portion 1042 .

[0057] The needle valve 105 may include a first valve portion 1051 and a second valve portion 1052 .

[0058] The first valve portion 1051 may be a portion formed at the tip of the needle valve 105. The first valve portion 1051 may move adjacent to the first nozzle portion 1041 or the second nozzle portion 1042 during vertical movement by the piston 106. For example, in the first state, the first valve portion 1051 may be positioned adjacent to the first nozzle portion 1041. Furthermore, in the second state, the first valve portion 1051 may move in the second direction so as to be adjacent to the second nozzle portion 1042.

[0059] The second valve portion 1052 may be, for example, a portion formed below the first valve portion 1051. The lower end of the second valve portion 1052 may be coupled to one surface of the piston 106. This allows the needle valve 105 to reciprocate vertically when the piston 106 reciprocates vertically.

[0060] Such a needle valve 105 may be formed such that the first valve portion 1051 has a smaller diameter than the second valve portion 1052 .

[0061] Also, first valve portion 1051 may be formed to have a smaller diameter than first nozzle portion 1041. In other words, first valve portion 1051 may not contact either first nozzle portion 1041 or second nozzle portion 1042 in the first state or the second state.

[0062] Meanwhile, the nozzle 104 may further include a sealing member 1043 provided in the second nozzle portion 1042. The sealing member 1043 may be made of, for example, an O-ring or a quad ring made of an elastic material such as silicone or rubber. The inner diameter of the sealing member 1043 may be larger than the diameter of the first valve portion 1051 and may be equal to or smaller than the diameter of the second valve portion 1052. Alternatively, the inner diameter of the sealing member 1043 may be larger than the diameter of the first nozzle portion 1041.

[0063] The second valve portion 1052 may be disposed adjacent to the sealing member 1043 in the first state. That is, in the first state, the second valve portion 1052 may contact the sealing member 1043. This may seal the reservoir 103 to prevent aerosol leakage through the nozzle 104.

[0064] Meanwhile, in the second state, the second valve portion 1052 may be moved in the second direction beyond the sealing member 1043 and out of contact with the nozzle 104. This allows the inhalable composition stored in the reservoir 103 to be ejected into the mouthpiece 102 through the nozzle 104.

[0065] 4(b), the gap formed between the first nozzle portion 1041 and the first valve portion 1051 is defined as a first gap G1, and the gap formed between the sealing member 1043 and the first valve portion 1051 is defined as a second gap G2. Due to the structures of the nozzle 104 and the needle valve 105 described above, the first gap G1 can be formed to be smaller than the second gap G2.

[0066] The reason why the diameter of the needle valve 105 is configured to vary depending on the section and the nozzle 104 is spatially separated so that the first gap G1 and the second gap G2 having different cross-sectional areas are formed is to uniformly control the amount of aerosol sprayed.

[0067] The amount of aerosol sprayed is generally proportional to the cross-sectional area of the nozzle 104. If the nozzle 104 is not spatially separated, such as by the first gap G1 and the second gap G2, the cross-sectional area of the nozzle 104 is determined solely by the distance between the sealing member 1043 and the needle valve 105. In this case, if a sealing member 1043 formed by, for example, a quad ring is used, the tolerance of the quad ring is generally 0.05 mm, making it difficult to ensure a consistent spray cross-sectional area. Therefore, the nozzle 104 may be spatially separated so that only the opening and closing of the inhalable composition is controlled at the second gap G2, and the aerosol is ultimately sprayed at the first gap G1, which is relatively easy to control tolerances.

[0068] When the opening and the injection occur simultaneously, the amount of the injected aerosol may be controlled only by the injection area of the first gap G1.

[0069] Factors that affect the injection amount include not only the cross-sectional area of the nozzle as mentioned above, but also pipe resistance, thrust pressure, fluid viscosity, and the like.

[0070] Specifically, the amount of aerosol sprayed may vary depending on the distance traveled by the inhalable composition through the first gap G1. For a given second gap G2, the amount of aerosol sprayed may vary depending on the stroke distance of the needle valve 105. For example, as the stroke distance of the needle valve 105 decreases, the distance traveled by the inhalable composition through the first gap G1 increases, resulting in a decrease in the amount of aerosol sprayed.

[0071] The first gap G1 may be formed in the first state or the second state, and the second gap G2 is formed when the first valve portion 1051 is positioned adjacent to the sealing member 1043, so that the needle valve 105 can be formed in the second state when moved in the second direction.

[0072] The second gap G2 allows the movement of the inhalable composition ejected from the reservoir 103. The first gap G1 controls the size of the aerosol particles that pass through the second gap G2. That is, since the first gap G1 is smaller than the second gap G2, it allows only the movement of fine particles in the aerosol. As a result, only aerosol particles that can pass through the first gap G1 can move to the mouthpiece 102 and be ejected to the user.

[0073] That is, when the nozzle 104 is opened by the suction force, the aerosol is eventually sprayed out through the first gap G1, but the initial spray from the reservoir 103 occurs through the second gap G2 formed between the sealing member 1043 and the first valve portion 1051.

[0074] That is, both the nozzle 104 and the needle valve 105 are processed in a straight shape, and the first gap G1 is always formed regardless of whether the nozzle 104 is open or closed, so that the actual opening and closing is formed between the sealing member 1043 and the needle valve 105.

[0075] The first gap G1 may be formed to 0.015 to 0.03 mm to spray aerosol particles that are sufficiently small. For example, if the first gap G1 is smaller than 0.015 mm, the liquid composition may have difficulty moving through the narrow gap and be sprayed mainly as gas, with some droplets spat out weakly, like boiling. In contrast, if the first gap G1 is larger than 0.03 mm, the liquid composition may be sprayed mainly as large droplets, resulting in an excessive spray volume per unit time, which may cause the user's nasal or oral cavity to feel wet. Furthermore, if the second gap G2 is formed too narrow due to manufacturing tolerances of the sealing member 1043, a similar phenomenon to that observed when the first gap G1 is narrow may occur. In consideration of this, the second gap G2 may be formed to be sufficiently larger than the first gap G1. As a result, the inhaler 10 according to one embodiment is capable of spraying aerosol particles of fine particles and easily adjusting the spray volume.

[0076] As described above, in one embodiment of the inhaler 10, the first gap G1 and the second gap G2 having different cross-sectional areas are separately generated on the nozzle 104 from which the aerosol is emitted by opening and closing the needle valve 105, and by identifying the appropriate intervals of the two separated gaps G1 and G2, the uniform emission of the sprayed aerosol can be controlled.

[0077] In addition, the first gap G1 and the second gap G2 that maintain the donut shape allow the aerosol to be sprayed in a narrower area relative to the spray area, forming finer particles and improving the phenomenon of wetting or hitting the inside of the user's mouth.

[0078] In addition, in the inhaler 10 according to one embodiment, the needle valve 105 is normally pushed upward in a first direction by the preload of the spring 107, maintaining the nozzle 104 closed. However, in the inhaler 10 according to one embodiment, when the user applies inhalation force through the mouthpiece 102, negative pressure is generated below the piston 106, causing the piston 106 to move downward against the preload of the spring 107, and the needle valve 105 connected to the piston 106 descends, forming a second gap G2 between the sealing member 1043 and the needle valve 105. As a result, the inhalable composition in the reservoir 103 can be ejected in an aerosol state via the second gap G2 and the first gap G1 to the outside, for example, into the user's oral cavity. When the user stops inhaling, the piston 106 and the needle valve 105 further rise due to the restoring force of the spring 107, closing the nozzle 104 and stopping the aerosol ejection.

[0079] As described above, the present invention has been described with reference to specific components and other specific details, limited examples, and drawings. However, these are merely provided for a more comprehensive understanding of the present invention, and the present invention is not limited to the above-described examples. Those skilled in the art will appreciate that various modifications and variations may be made from these descriptions. For example, the described techniques may be performed in a different manner than described, and / or the described structures, devices, and other components may be combined or combined in a different manner than described, or replaced or substituted with other components or equivalents, while still achieving suitable results. Therefore, the spirit of the present invention is not limited to the described embodiments, and all modifications equivalent to or within the scope of the following claims, including but not limited to the spirit of the present invention, are deemed to fall within the spirit of the present invention.

Claims

1. a housing including one surface, another surface opposite to the one surface, and a plurality of side surfaces connecting the one surface and the other surface; a mouthpiece disposed on one surface of the housing; a reservoir disposed within the housing for storing an inhalable composition; a nozzle extending from said mouthpiece to said reservoir; a needle valve movably disposed within the nozzle and operable in a first state to seal the nozzle or a second state to open the nozzle; and a sealing member fixedly installed on the nozzle; Including, In the first state, a first gap is formed between the needle valve and the nozzle; In the second state, a second gap is formed between the needle valve and the sealing member; the first state is defined as a state in which the needle valve contacts the sealing member; the second state is defined as a state in which the needle valve is not in contact with the sealing member; The nozzle is a first nozzle portion adjacent the mouthpiece; and a second nozzle portion adjacent the reservoir; Including, The first nozzle portion is formed to have a smaller diameter than the second nozzle portion.

2. 10. The inhaler of claim 1, wherein the first spacing is smaller than the second spacing.

3. The needle valve is a first valve portion formed at a distal end thereof and vertically reciprocating between the first nozzle portion and the second nozzle portion in a first direction from one side of the housing to the other side or in a second direction from one side of the housing to the other side; and a second valve portion formed below the first valve portion; Including, 10. The inhaler of claim 1, wherein the first valve portion is formed to have a smaller diameter than the second valve portion.

4. 4. The inhaler of claim 3, wherein the first valve portion is formed to have a smaller diameter than the first nozzle portion.

5. the first valve portion does not contact the first nozzle portion in the first state or the second state; 4. The inhaler of claim 3, wherein the second valve portion contacts the sealing member in the first state and does not contact the sealing member in the second state.

6. the first gap is formed between the first valve portion and the first nozzle portion; 4. The inhaler of claim 3, wherein the second gap is formed between the first valve portion and the sealing member.

7. the second gap permits movement of the inhalable composition ejected from the reservoir; 10. The inhaler of claim 1, wherein the first gap controls the size of particles of the inhalable composition passing through the second gap to allow movement to the mouthpiece.

8. The inhaler of claim 1, wherein the first gap is formed to be 0.015 to 0.03 mm.

9. a piston having the needle valve attached to one side thereof and capable of vertically reciprocating in a first direction from one side of the housing to the other side thereof or in a second direction from one side of the housing to the other side thereof; a spring installed in a preloaded state under the piston; further comprising When no inhalation force is applied through the mouthpiece, the spring pushes the piston in the first direction, and the first state is maintained.

9. The inhaler of claim 1, wherein when an inhalation force is applied through the mouthpiece, the piston overcomes the preload of the spring and moves in the second direction to switch to the second state.

10. a passage formed inside the housing and extending from one side of the mouthpiece to a lower portion of the piston; 10. The inhaler of claim 9, wherein the passage transmits a suction force applied to the mouthpiece to the piston.

11. a negative pressure generating unit that forms a space between the piston and the passage; The inhaler according to claim 10, wherein the negative pressure generating unit generates negative pressure by the suction force to induce the piston to move in the second direction.

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