Powder applicator

Abstract

The present invention relates to a powder applicator comprising: an air reservoir, which includes a first main body and a second main body that communicate with each other, forms the exterior of the powder applicator, and has both ends closed so as to be filled with air; a powder reservoir which is disposed between a discharge port through which powder is discharged and an operating part, and which includes a first sub-body that is disposed inside the first main body and includes a space in which the powder is to be filled, and an air supply passage that is formed at a portion adjacent to the discharge port of the first sub-body and includes at least one opening; a filter which is disposed, in correspondence to the air supply passage, between the powder reservoir and the air reservoir, and which blocks powder movement between the powder reservoir and the air reservoir and permits air movement therebetween; and the operating part that includes a plunger disposed inside the powder reservoir so as to divide the space of the first sub-body.

Description

powder applicator

[0001] The present invention relates to a powder applicator.

[0002] During surgical operations, various bleeding situations occur. For large amounts of bleeding, sutures, clips, staplers, etc. are used first. For additional small amounts of bleeding, sheets, gauze, powder, and gel-type hemostatic agents are used for the purpose of supplementary hemostasis.

[0003] Unlike other types of hemostatic agents, powder-based hemostatic agents are contained in an applicator, allowing them to be used even in deep, narrow, and difficult-to-reach areas. Furthermore, because they are not restricted by shape, they can be used in a variety of areas, regardless of the site or area of ​​bleeding. However, due to the lack of shape restrictions, powder-based hemostatic agents must be filled into a powder-dispensing applicator to ensure accurate application to the affected area.

[0004] For these powder spray applicators, the amount to be used must be adjusted according to the amount of bleeding and the area of ​​bleeding, so they must be capable of spraying multiple times, and the amount to be sprayed must be consistent so that the user can predict how much powder to use.

[0005] The problem to be solved by the present invention is to provide a powder applicator that is capable of spraying multiple times and has improved uniformity of powder spray amount and accuracy of spray timing.

[0006] The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the description below.

[0007] A powder applicator according to a first aspect of the present invention comprises a first main body and a second main body which are connected to each other, and which form the outer shape of the powder applicator, and which have both ends closed and are filled with air; a first sub-body which is disposed inside the first main body and which includes a space for filling the inside with powder, and which is disposed between a discharge port through which powder is discharged and an operating unit, and which includes an air supply passage which is formed in a portion of the first sub-body adjacent to the discharge port and which includes at least one opening; a filter which is disposed between the powder reservoir and the air reservoir corresponding to the air supply passage, and which blocks movement of powder between the powder reservoir and the air reservoir but allows movement of air; and an operating unit which includes a plunger which is disposed inside the powder reservoir and divides a space between the first sub-body.

[0008] In the powder applicator according to the second aspect of the present invention, the operating part may additionally include a second sub-body that is arranged to be slidable relative to the powder reservoir and at least partially overlaps the powder reservoir.

[0009] In the powder applicator according to the first or second aspect of the present invention, the operating part may further include a spring disposed between the plunger and the end of the first sub-body to apply pressure to the powder disposed in the powder reservoir through the plunger.

[0010] In the powder applicator according to the first or second aspect of the present invention, the spring may have an elastic force to cause the plunger to come into close contact with one end surface of the internal space of the powder reservoir.

[0011] In the powder applicator according to the first or second aspect of the present invention, the plunger can be pressurized by the spring to pressurize the powder so that there is no empty space in the internal space of the powder reservoir. In the powder applicator according to the first or second aspect of the present invention, a blocking member coupled to the discharge port to block contact between the powder and the external environment may be further included.

[0012] In the powder applicator according to the first or second aspect of the present invention, the air reservoir may further include a handle portion having a structure protruding outward from the first main body or a handle portion formed as a separate structure from the first main body and coupled to one end of the first main body.

[0013] In the powder applicator according to the first aspect of the present invention, when an external force is applied in one direction to the second main body, the second main body contracts in the direction of the first main body, the air filled in the air reservoir increases in pressure and is supplied to the powder reservoir through the air supply passage, and the plunger can pressurize the powder filled in the powder reservoir.

[0014] In the powder applicator according to the first aspect of the present invention, the first main body and the second main body may be arranged to overlap at least partially, and the second main body may be in the form of a bellows member having a structure that is folded by being wrinkled.

[0015] In a powder applicator according to a second aspect of the present invention, when an external force is applied in one direction to the second main body, the second main body and the second sub-body move toward the first main body and the first sub-body, respectively, and the air filled in the air reservoir increases in pressure and is supplied to the powder reservoir through the air supply passage, and the plunger can pressurize the powder filled in the powder reservoir.

[0016] In a powder applicator according to a second aspect of the present invention, the first main body and the second main body are arranged to overlap at least partially, and the first main body and the second main body each include a first engaging portion and a second engaging portion that are mutually engaged at end sides adjacent to each other, and the first main body and the second main body can be mutually slidable by at least partially overlapping each other.

[0017] In a powder applicator according to a second aspect of the present invention, the air reservoir further includes a bellows member, and the bellows member is disposed between the first main body and the second main body and has a structure that is folded in a wrinkled manner in one direction.

[0018] Specific details of other embodiments are included in the detailed description and drawings.

[0019] In the case of a powder applicator according to embodiments of the present invention, it is possible to spray the filled powder multiple times, and at the same time, there is an effect of improving the uniformity of the powder spray amount and the accuracy of the spray timing.

[0020] The effects according to the embodiments of the present invention are not limited to the contents exemplified above, and more diverse effects are included in the present specification.

[0021] FIG. 1 is a perspective view of a powder applicator according to one embodiment of the present invention.

[0022] FIG. 2 is a side view of a powder applicator according to one embodiment of the present invention.

[0023] Figure 3 is a plan view of a powder applicator according to one embodiment of the present invention.

[0024] Figure 4 is an exploded view of a powder applicator according to one embodiment of the present invention.

[0025] FIGS. 5 to 7 are cross-sectional views of a powder applicator taken along line L-L' of FIG. 1, and are cross-sectional views for explaining an operating method of a powder applicator according to one embodiment.

[0026] FIGS. 8 to 10 are cross-sectional views illustrating an operating method of a powder applicator according to another embodiment of the present invention.

[0027] FIGS. 11 to 13 are cross-sectional views illustrating an operating method of a powder applicator according to another embodiment of the present invention.

[0028] FIG. 14 is a schematic perspective view of a powder applicator according to another embodiment of the present invention.

[0029] FIG. 15 is a schematic perspective view of a powder applicator according to another embodiment of the present invention.

[0030] Fig. 16 is a cross-sectional view of the powder applicator of Fig. 15.

[0031] FIG. 17 is a perspective view showing an embodiment in which a blocking member according to another embodiment of the present invention is applied to the powder applicator of FIG. 15.

[0032] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. These embodiments are provided solely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined solely by the scope of the claims.

[0033] Throughout the specification, the same reference numerals designate the same elements. The shapes, sizes, proportions, angles, numbers, etc., disclosed in the drawings for illustrating the embodiments are exemplary only and are not intended to limit the scope of the present invention.

[0034] Although terms like "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, it should be understood that a "first" component referred to below may also be a "second" component within the technical scope of the present invention.

[0035] The features of each of the various embodiments of the present invention can be partially or wholly combined or combined with each other, and various technical connections are possible, and each embodiment can be implemented independently of each other or implemented together in a related relationship.

[0036] Specific embodiments are described below with reference to the attached drawings.

[0037] FIG. 1 is a perspective view of a powder applicator according to one embodiment of the present invention. FIG. 2 is a side view of a powder applicator according to one embodiment of the present invention. FIG. 3 is a plan view of a powder applicator according to one embodiment of the present invention. FIG. 4 is an exploded view of a powder applicator according to one embodiment of the present invention.

[0038] First, in order to more clearly explain the technical idea of ​​the present invention, a coordinate system set in a first direction (X), a second direction (Y) perpendicular to the same plane as the first direction (X), and a third direction (Z) perpendicular to the planes of the first direction (X) and the second direction (Y) is described. The first direction (X), the second direction (Y), and the third direction (Z) are for explaining directions related to the structure and operating method of the powder applicator (10), and should be understood to mean relative directions, and the embodiments are not limited to the mentioned directions.

[0039] For example, when viewed from the front, the first direction (X) may mean the horizontal direction of the powder applicator (10), the second direction (Y) may mean the vertical direction of the powder applicator (10), and the third direction (Z) may mean the height direction of the powder applicator (10).

[0040] Referring to FIGS. 1 to 4, a powder applicator (10) according to one embodiment includes an air reservoir (100), a powder reservoir (200), an operating unit (300), a filter (400), and a discharge port (500), and may optionally additionally include a spraying member (600) and / or a blocking member (700). In addition, the powder applicator (10) may further include a plurality of sealing members (PM1, PM2, PM3, PM4) to provide airtightness between the respective components.

[0041] For example, a powder applicator (10) forms the main outer shape of the powder applicator (10) and includes an air reservoir (100) having a part of an internal space filled with air, a powder reservoir (200) arranged in the internal space of the air reservoir (100) and filled with powder, an operating unit (300) that slides in the third direction (Z) to the powder reservoir (200) when pressurized by an external force and pressurizes the powder filled in the powder reservoir (200), and slides in the opposite direction of the third direction (Z) when the external force is released, a filter (400) arranged between the powder reservoir (200) and the air reservoir (100) and allows the flow of air but blocks the flow of powder, a discharge port (500) through which powder filled in the powder reservoir (200) is discharged by the air pressure, and a spray port through which powder discharged from the discharge port (500) is sprayed by being mounted on the discharge port (500). Instead of the absence (600) and the injection member (600), a blocking member (700) may be installed on the discharge port (500) to block the powder from being discharged.

[0042] The air reservoir (100) may include a first main body (110) and a second main body (120). The air reservoir (100) may have a structure in which the first main body (110) is positioned at the top and the second main body (120) is positioned at the bottom in the height direction (Z). The first main body (110) and the second main body (120) may slide relative to each other in the third direction (Z) by an external force applied in the third direction (Z).

[0043] The first main body (110) and the second main body (120) are aligned in the third direction (Z) and can be arranged so that at least a portion thereof overlaps. The first main body (110) and the second main body (120) can have a cylindrical shape, but are not limited thereto. For example, the first main body (110) and the second main body (120) can have an oval shape or a polygonal shape such as a triangle, square, or pentagon on the XY plane.

[0044] For example, the first main body (110) may be entirely transparent or partially transparent. In addition, the first main body (110) may have a constant diameter or a tapered shape formed so that the width in the third direction (Z) changes. In addition, the second main body (120) may be a bellows member, and may have a constant diameter or a tapered shape formed so that the width in the third direction (Z) changes.

[0045] The first main body (110) and the second main body (120) can be arranged so that one has a larger area on the XY plane than the other, so that one having a larger area on the plane has a shape that surrounds at least a portion of the outer circumference of the other.

[0046] For example, if the first main body (110) and the second main body (120) have a cylindrical shape and the diameter of the second main body (120) is implemented to be larger than the diameter of the first main body (110), the upper part of the second main body (120) may have a shape that surrounds the lower part of the first main body (110). A first sealing member (PM1) may be arranged in the portion where the first main body (110) and the second main body (120) overlap. The first sealing member (PM1) may be an O-ring for sealing the portion where the first main body (110) and the second main body (120) overlap.

[0047] However, it is not limited thereto, and the diameter of the first main body (110) may be implemented to be larger than the diameter of the second main body (120), and the lower part of the first main body (110) may have a shape that surrounds the upper part of the second main body (120), in which case, as can be understood by a person skilled in the art, some features (e.g., the position and size of the first catching portion (113), the second catching portion (122), and the first sealing member (PM1)) may be modified.

[0048] The first main body (110) includes a first body portion (111) and a first coupling portion (112), and may optionally further include a first catch portion (113) and a handle portion (114). The first body portion (111) may constitute the main shape of the first main body (110). The first coupling portion (112) has a structure for coupling a discharge port (500) to an outer circumferential surface, and may be formed on one end side of the first body portion (111) in the third direction (Z). For example, the first coupling portion (112) may have a shape protruding from the first body portion (111) in the third direction (Z), and may have a structure for coupling with the discharge port (500).

[0049] As a specific example, the first coupling portion (112) may have screw threads formed on the outer surface for coupling with the discharge port (500) and screw threads formed on the inner surface for coupling with the powder reservoir (200), but is not limited thereto, and the structure of the first coupling portion (112) may be modified in various ways depending on the structures of the discharge port (500) and the powder reservoir (200).

[0050] The handle portion (114) may have a structure that supports the powder applicator (10) when an external force is applied in the third direction (Z) when the user uses the powder applicator (10). The handle portion (114) may have a structure that protrudes from the side of the first body portion (111) or may be formed as a separate structure from the first body portion (111) and coupled to one end of the first body portion (111).

[0051] For example, the handle portion (114) may have an I shape that protrudes in the second direction (Y) and in the opposite direction of the second direction (Y) from the side of the first body portion (111) adjacent to the first coupling portion (112) and crosses the first body portion (111) when viewed in the third direction (Z), and the portions protruding in the second direction (Y) and in the opposite direction of the second direction (Y) may be symmetrical or asymmetrical to each other. However, the shape of the handle portion (114) is not limited thereto, and may have various shapes for a user to support the powder applicator (10) in the third direction (Z).

[0052] The first catch portion (113) may be formed on the other end side of the first body portion (111) in the third direction (Z). The first catch portion (113) may have a shape in which the other end of the first body portion (111) protrudes outward along the side circumference. The first catch portion (113) may be implemented to engage with the second catch portion (122) of the second main body (120), thereby preventing the first main body (110) and the second main body (120) from being separated in the third direction (Z). The degree of protrusion of the first catch portion (113) may be determined depending on the difference in diameter between the first main body (110) and the second main body (120).

[0053] In this embodiment, the first catch portion (113) is exemplified as protruding outward from the first body portion (111) by exemplifying that the diameter of the second body portion (121) is larger than the diameter of the first body portion (111). However, if the diameter of the first body portion (111) is larger than the diameter of the second body portion (121), the first catch portion (113) may have a structure protruding inward from the first body portion (111). In this case, as will be described later, the second catch portion (122) may have a structure protruding outward from the second body portion (121).

[0054] The second main body (120) includes a second body portion (121) and may optionally further include a second catch portion (122) and a support structure (123). The second body portion (121) may constitute the main shape of the second main body (120). The second catch portion (122) and the support structure (123) may be formed on the second body portion (121).

[0055] The second catch portion (122) may be formed on one end side of the second body portion (121) in the third direction (Z). The second catch portion (122) may have a shape in which one end of the second body portion (121) protrudes inward along the side circumference. The second catch portion (122) may be implemented to engage with the first catch portion (113). The second catch portion (122) may be deformed depending on the structure of the first catch portion (113).

[0056] The support structure (123) may be formed on the inner surface of the other end of the second body part (121) in the third direction (Z). The support structure (123) may be a structure to which the operating part (300) is fixed. For example, the support structure (123) protrudes inwardly (in the third direction (Z)) from the other end surface of the second body part (121) and may have an O-shape when viewed from the third direction (Z). The outer diameter of the support structure (123) may be set so that the second sub-body (310) of the operating part (300) is engaged and fixed. In addition, the inner diameter of the support structure (123) may be set so that the spring (330) of the operating part (300) is disposed therein.

[0057] The first main body (110) and the second main body (120) of the air reservoir (100) form the main outer shape of the powder applicator (10), and a powder reservoir (200) and an operating unit (300) can be arranged inside the air reservoir. Any space within the air reservoir (100) other than the space where the powder reservoir (200) and the operating unit (300) are arranged can be filled with air.

[0058] According to one embodiment of the present invention, the volume of the internal space of the air reservoir (100) can be reduced as the first main body (110) and the second main body (120) move to slide against each other by an external force applied in the third direction (Z), thereby increasing the pressure of the air filled in the internal space.

[0059] According to another embodiment of the present invention, as illustrated in FIGS. 14 to 17, when an external force is applied in one direction to the second main body (120'' or 120'''), the second main body (120'' or 120''') contracts in the direction of the first main body (110'' or 110'''), the air filled in the air reservoir (100) increases in pressure and is supplied to the powder reservoir (200) through the air supply passage, and the plunger (320) can pressurize the powder filled in the powder reservoir (200). For example, the first main body (110'' or 110''') and the second main body (120'' or 120''') may be arranged to overlap at least partially, and the second main body (120'' or 120''') may be in the form of a bellows member having a structure that is folded by being wrinkled.

[0060] The powder reservoir (200) may include a first sub-body (210) disposed inside the first main body (110), a second coupling portion (220) formed at one end of the first sub-body (210) in the third direction (Z), and an air supply passage (230) disposed on a side of the first sub-body (210) adjacent to the second coupling portion (220).

[0061] The XY plane shape of the first sub-body (210) may be cylindrical, but is not limited thereto. For example, the XY plane shape of the first sub-body (210) may have an elliptical shape or a polygonal shape such as a triangle, square, or pentagon.

[0062] The first sub-body (210) may have a smaller diameter than the first main body (110). As a non-limiting example, the width of the first sub-body (210) in the third direction (Z) may be larger than the width of the first main body (110) in the third direction (Z). The first sub-body (210) may be configured to be filled with powder therein.

[0063] The second coupling portion (220) may have a structure protruding in the third direction (Z) from one end of the first sub-body (210). For example, the second coupling portion (220) may have a cylindrical shape with a diameter smaller than that of the first sub-body (210), and at least a portion of its outer circumferential surface may have a coupling structure for coupling with the inner circumferential surface of the first coupling portion (112) of the first main body (110).

[0064] For example, the diameter of the outer circumference of the second coupling portion (220) corresponds to the diameter of the inner circumference of the first coupling portion (112), and at least a portion of the outer circumference of the second coupling portion (220) may have screw threads formed to engage with the screw threads of the inner circumference of the first coupling portion (112) and be screw-coupled. In addition, a second sealing member (PM2) for airtightness between the two components may be arranged at a portion where the outer circumference of the second coupling portion (220) and the inner circumference of the first coupling portion (112) come into contact. The second sealing member (PM2) may be an O-ring having a size corresponding to the outer circumference of the second coupling portion (220).

[0065] A discharge port (500) may be fitted into the inner surface of the second coupling portion (220). In some embodiments, a coupling structure may be formed on the inner surface of the second coupling portion (220) to which the discharge port (500) is coupled.

[0066] The air supply passage (230) may include at least one opening formed on a side surface of one end of the first sub-body (210). For example, the air supply passage (230) may include four openings arranged along the periphery of the first sub-body (210). However, the present invention is not limited thereto, and the air supply passage (230) may include three or fewer or five or more openings. In addition, the opening included in the air supply passage (230) may have a circular shape in plan view, but is not limited thereto, and may be formed in other polygonal or oval shapes, such as a square or pentagon.

[0067] The powder reservoir (200) can be communicated with the air reservoir (100) through the air supply passage (230). The powder filled in the powder reservoir (200) can be discharged to the discharge port (500) by compressed air flowing in through the air supply passage (230). As described below, the powder applicator (10) according to the present invention can be advantageous in minimizing air resistance caused by the powder trap (PT) and efficiently injecting compressed air into the powder reservoir (200) to discharge the powder filled in the powder reservoir (200) since the air supply passage (230) is implemented on the side adjacent to the discharge port (500) and the powder trap (PT).

[0068] The operating unit (300) may include a plunger (320) and optionally further include a second sub-body (310) and a spring (330). The second sub-body (310) may have a shape corresponding to the first sub-body (210) in order to at least overlap with it. Accordingly, the second sub-body (310) may have a cylindrical shape, but is not limited thereto, and like the first sub-body (210), the shape on the XY plane may have an elliptical or polygonal shape such as a triangle, square, or pentagon.

[0069] The second sub-body (310) can be arranged inside the second main body (120). The second sub-body (310) is arranged to overlap at least partially with the powder reservoir (200), so that it can slide with respect to the first sub-body (210) in the third direction (Z).

[0070] The upper portion (one end side in the third direction (Z)) of the second sub-body (310) may overlap at least partially with the lower portion of the first sub-body (210). The diameter of the second sub-body (310) may be larger than the diameter of the first sub-body (210). For example, the diameter of the inner surface of the second sub-body (310) may be formed to correspond to the diameter of the outer surface of the first sub-body (210), so that the inner surface of the second sub-body (310) may surround the outer surface of the first sub-body (210).

[0071] Additionally, the diameter of the second sub-body (310) may be set to be fixed by the support structure (123). For example, the diameter of the second sub-body (310) may be formed so that the inner circumference corresponds to the outer circumference of the support structure (123). In this case, the diameter of the support structure (123) and the diameter of the outer circumference of the first sub-body (210) may be substantially the same, but are not limited thereto.

[0072] The second sub-body (310) may be fitted into the outer surface of the support structure (123). However, the present invention is not limited thereto, and as another example, a structure for fixing each other, for example, a screw thread for screw-joining, may be formed on the other end of the second sub-body (310) and the outer surface of the support structure (126). In some embodiments, the second sub-body (310) may be formed integrally with the second main body (120), in which case the support structure (123) may be omitted. In addition, the width of the second sub-body (310) in the third direction (Z) may be smaller than the width of the second main body (120) in the third direction (Z), but is not limited thereto.

[0073] The size difference in the width in the third direction (Z) of each of the first main body (110), the second main body (120), the first sub-body (210) and the second sub-body (310) and the width between each of the components may be determined according to the amount of powder filled in the powder reservoir (200), the size and elastic coefficient of the spring (330), the air pressure required to discharge the powder filled in the powder reservoir (200), etc.

[0074] Likewise, the diameter of each of the first main body (110), the second main body (120), the first sub-body (210), and the second sub-body (310) can be designed according to the amount of powder filled in the powder reservoir (200), the size and elastic coefficient of the spring (330), the air pressure required to discharge the powder filled in the powder reservoir (200), etc., unless there is a limitation on the size relationship between them in this specification.

[0075] The plunger (320) is placed inside the powder reservoir (200) and can move in the third direction (Z) inside the first sub-body (210) by the third direction (Z) elastic force of the spring (330). The plunger (320) may include a packing member (321) and a connecting member (322).

[0076] The packing member (321) can seal the other end of the third direction (Z) of the first sub-body (210). The packing member (321) can have a planar shape that is substantially the same as the XY plane shape of the first sub-body (210). For example, when the first sub-body (210) has a circular shape on the XY plane, the packing member (321) can have a circular shape with a diameter corresponding to the inner diameter of the first sub-body (210). The packing member (321) can have a sealing performance to the extent that foreign substances such as air or dust are not introduced from a direction opposite to the third direction (Z) into the powder filled in the first sub-body (210).

[0077] In addition, the packing member (321) can pressurize the powder filled in the first sub-body (210) by the elastic force transmitted from the spring (330), but can have a rigidity that does not deform its shape. For example, the packing member (321) can be made of silicon.

[0078] The connecting member (322) may have a structure for connecting the packing member (321) to the spring (330). For example, if the packing member (321) is implemented as a circular ring having a circular shape and including an opening in the center when viewed in the third direction (Z), the connecting member (322) may have a structure for one end to be fitted into the opening of the packing member (321) in the third direction (Z), and the other end may have a structure for being coupled to the spring (330).

[0079] The connecting member (322) may have the function of sealing the powder filled in the first sub-body (210), similar to the packing member (321). The connecting member (322) may be composed of substantially the same material as the packing member (321), but is not limited thereto.

[0080] The packing member (321) and the connecting member (322) may be formed as separate components and may be combined, but are not limited thereto, and the packing member (321) and the connecting member (322) may be formed as one piece.

[0081] The spring (330) is arranged to be elastic in the third direction (Z), and one end is fixedly connected to the plunger (320) in the third direction (Z), and the other end is fixed to the support structure (123) of the second main body (120) or can be spaced apart from the support structure (123).

[0082] The elastic coefficient of the spring (330) can be set so that no empty space is created inside the first sub-body (210) when the plunger (320) pressurizes the powder filled in the powder reservoir (200), as understood by those skilled in the art according to the teachings of the present invention. In addition, the diameter, length, and thickness of the spring (330) can be determined according to the elastic coefficient and design details of other components (e.g., the width in the third direction (Z) of the first and second main bodies (110, 120) and the first and second sub-bodies (210, 310)).

[0083] The filter (400) may be placed between the first main body (110) and the first sub-body (210). The filter (400) is placed between the outer surface of the first sub-body (210) and the inner surface of the first main body (110), and one end in the third direction (Z) may be in contact with the inner side of one end of the first main body (110). In addition, the filter (400) may be placed corresponding to the air supply passage (230).

[0084] The filter (400) may have a circular ring shape having a width (i.e., width in the first direction (X) and second direction (Y) planes) that is substantially the same as the distance between the outer surface of the first sub-body (210) and the inner surface of the first main body (110). In addition, the third direction (Z) width of the filter (400) may have a width that extends from one end of the first sub-body (210) and completely covers the air supply passage (230).

[0085] When an external force is applied to the other side of the second main body (120), and the volume of air placed in the air reservoir (100) decreases and air pressure is generated, the filter (400) can supply the air filled in the air reservoir (100) to the powder reservoir (200) through the air supply passage (230), but can block the powder filled in the powder reservoir (200) from flowing into the air reservoir (100). As a non-limiting example, the filter (400) can be implemented as a porous filter.

[0086] In another embodiment, the shape of the filter (400) may be varied in various ways depending on the number and shape of openings included in the air supply passage (230) within a range that allows the flow of air through the air supply passage (230) between the powder reservoir (200) and the air reservoir (100) but blocks the flow of powder.

[0087] The discharge port (500) may include a powder discharge passage for discharging powder filled in the powder reservoir (200). The discharge port (500) may be arranged between the spraying member (600) or the blocking member (700) and the air reservoir (100) and the powder reservoir (200).

[0088] The discharge port (500) may have one end connected to the injection member (600) or the blocking member (700) in the third direction (Z), and the other end connected to the air reservoir (100) and the powder reservoir (200). Specifically, the other end of the discharge port (500) may be coupled and / or connected to the first coupling member (112) and the second coupling member (220). With respect to the structure of the discharge port, any known structure may be employed, and for example, reference may be made to the powder delivery device disclosed in FIGS. 12 to 14 of U.S. Patent No. 10,507,293, but is not limited thereto.

[0089] The discharge port (500) may include an internal structure and an external structure. The internal structure may have a cylindrical structure in which an outer surface is fitted to an inner surface of the second coupling portion (220) and a powder discharge passage is formed therein. The external structure may be formed on the outside of the internal structure and may include an inner surface for coupling with the first coupling portion (112) and an outer surface for coupling with the injection member (600) or the blocking member (700). The discharge port (500) may have a shape in which the internal structure protrudes in the opposite direction of the third direction (Z) compared to the external structure. The internal structure and the external structure of the discharge port (500) may vary depending on the structures of the first coupling portion (112) and the second coupling portion (220).

[0090] The discharge port (500) may include a powder trap (PT). The powder trap (PT) may be formed at the other end of the internal structure in the third direction (Z). To form the powder trap (PT), a separate powder trap member (PTM) may be coupled to the other end of the internal structure, but is not limited thereto. For example, the powder trap (PT) may be formed integrally with the discharge port (500) using a technology such as 3D printing.

[0091] When the powder discharge passage of the discharge port (500) is directly connected to the internal space of the first sub-body (210) of the powder reservoir (200), the powder filled in the powder reservoir (200) can be discharged as one end of the discharge port (500) faces the direction of gravity. Accordingly, the powder trap (PT) may have a structure for preventing discharge of powder other than powder filled in the powder reservoir (200) being intentionally discharged by air pressure.

[0092] For example, the powder trap (PT) may include a passage in the shape of an arrow facing in the opposite direction to the direction in which the powder is discharged (the third direction (Z)), as illustrated in FIGS. 5 to 10, but having a blunt cross-sectional shape at the end of the arrow. That is, the passage of the powder trap (PT) may have a path in which the powder reservoir (200) and the discharge port (500) are connected, but a portion adjacent to the powder reservoir (200) faces in the opposite direction to the direction in which the powder is discharged by the discharge port (500) (i.e., in the opposite direction to the third direction (Z)).

[0093] Accordingly, even if the discharge port (500) is arranged along the direction in which gravity acts, the powder filled in the powder reservoir (200) cannot flow into the passage of the powder trap (PT) facing in the direction opposite to gravity, and thus, in addition to the powder being intentionally discharged when an external force is applied to the other end of the powder applicator (10), the powder can be prevented from being unintentionally discharged.

[0094] In this specification, it is exemplified that there are two passages communicating with the powder trap (PT) and the powder reservoir (200), but this is not limiting. In another example, there may be three or more passages communicating with the powder trap (PT) and the powder reservoir (200), or there may be only one.

[0095] A third sealing member (PM3) may be arranged on at least a portion of the outer surface of the internal structure. The third sealing member (PM3) may provide airtightness between the internal structure of the discharge port (500) and the second joint (220) of the powder reservoir (200).

[0096] The spray member (600) is configured to be coupled to the discharge port (500) to spray powder onto the affected area, and may include a needle (610) and a needle tube (620). The needle (610) is coupled to the discharge port (500), and the needle tube (620) may be connected to the powder discharge passage of the discharge port (500) through the needle (610).

[0097] The shape of the spray member (600) may be applied to various types of spray members as understood by those skilled in the relevant technical field. For example, the spray member (600) may have various structures depending on the type and size of the affected area to which the powder is sprayed, such as a structure suitable for insertion into a patient's body through an endoscope during surgery.

[0098] The blocking member (700) can be combined with the discharge port (500) instead of the spraying member (600) before the powder applicator (10) is used. The blocking member (700) can prevent the powder filled in the powder reservoir (200) from being exposed to the outside air or foreign substances such as dust from entering the powder reservoir (200) through the discharge port (500).

[0099] The blocking member (700) may include a cylindrical structure for blocking the powder discharge passage of the discharge port (500). In addition, the blocking member (700) may include a structure that is connected to the cylindrical structure and is advantageous for the blocking member (700) to be separated from the discharge port (500). For example, the blocking member (700) may have a structure in which a cylindrical structure and a ring-shaped structure are connected in the third direction (Z), but is not limited thereto. As another example, the blocking member (700) may have various structures, such as a cylindrical structure and a hook-shaped structure connected in the third direction (Z) or a cylindrical structure and a 'T'-shaped structure connected.

[0100] A fifth sealing member (PM4) in the shape of an O-ring for airtightness between the two components may be placed between the injection member (600) or the blocking member (700) and the discharge port (500).

[0101] FIGS. 5 to 7 are cross-sectional views of a powder applicator taken along line L-L' of FIG. 1, wherein FIG. 5 is a drawing showing a powder applicator (10) in a state where the powder is kept airtight by a blocking member (700) before the powder applicator (10) is used, FIG. 6 is a drawing showing a process in which powder filled in the powder applicator (10) is discharged as an external force is applied to the air reservoir (100) and the operating unit (300), and FIG. 7 is a drawing showing a powder applicator (10) after all powder filled in the powder reservoir (200) is discharged.

[0102] Hereinafter, a method of operating a powder applicator (10) according to one embodiment will be described with reference to FIGS. 5 to 7. In FIGS. 5 to 6, the powder filled in the powder reservoir (211) is omitted for convenience of explanation, but the space between the plunger (320) and the powder trap (PT) may be filled with powder.

[0103] First, referring to FIG. 5, a powder applicator (10) according to one embodiment may have a blocking member (700) coupled to a discharge port (500) to ensure the airtightness of powder filled in a powder reservoir (200) before being used by a user. In addition, before the powder applicator (10) is used, a spring (330) may be in a compressed state with a length shorter than the length of the spring in its equilibrium state. As described below, as powder is discharged by the powder applicator (10), the compressive force applied to the spring (330) decreases, and the third direction (Z) length of the spring (330) may become longer.

[0104] Thereafter, for use, the user can separate the blocking member (700) from the discharge port (500) and attach a spraying member (700) suitable for the area where the powder is to be applied to the discharge port (500).

[0105] In this case, even if one end of the discharge port (500) is opened to the outside as the injection member (700) is coupled to the discharge port (500), the powder applicator (10) according to one embodiment can prevent powder from being discharged from the powder applicator (10) unintentionally in a situation such as when the discharge port (500) faces the direction in which gravity acts or when an external action such as vibration is applied to the powder applicator (10), because the discharge port (500) includes a powder trap (PT).

[0106] Next, the user can use the handle (114) to support the powder applicator (10) from moving in the third direction (Z) and apply an external force to the other end of the second main body (120) to spray the powder filled in the powder reservoir (200).

[0107] For example, a user can support one end surface of the handle part (114) using the index and middle fingers of one hand and press the other end of the second main body (120) with the thumb of the same hand. Accordingly, the powder applicator (10) can move in a third direction (Z) by sliding the second main body (120) and the second sub-body (310) relative to the first main body (110) and the first sub-body (210), respectively, as illustrated in FIGS. 5 and 6. The air filled in the internal space of the air reservoir (100) is compressed, and the compressed air can be supplied to the inside of the powder reservoir (200) through the air supply passage (230) via the filter (400).

[0108] The powder filled in the powder reservoir (200) can be transported by the flow of air supplied through the air supply passage (230) and applied to the patient's affected area through the discharge port (500) and the spray member (600) via the powder trap (PT).

[0109] In this way, since the powder applicator (10) according to the present invention allows the air flow for transporting the powder to be introduced through the air supply passage (230) disposed adjacent to the position where the discharge port (500) and the powder trap (PT) are disposed, the force for moving the powder filled in the powder reservoir (200) to the discharge port (500) through the powder trap (PT) can be efficiently transmitted, thereby increasing the flowability of the powder and being advantageous in effectively discharging the powder.

[0110] In addition, when the air flow for discharging the powder flows into the other end of the powder reservoir (200), for example, the part where the powder is pressurized by the plunger (320), the air flowing into the powder reservoir (200) is resisted by the other end of the powder trap (PT), whereas the powder applicator (10) of the present invention prevents air resistance by the powder trap (PT) and at the same time separates the direction of air inflow from the direction in which the powder is pressurized by the plunger (320), thereby being advantageous in more efficiently discharging the powder filled in the powder reservoir (200).

[0111] Meanwhile, since the powder applicator (10) according to one embodiment is arranged so that the first main body (110) and the second main body (120) and the first sub-body (210) and the second sub-body (310) are each at least partially overlapped and fitted together and slide in the third direction (Z), as illustrated in FIGS. 5 to 10, the powder applicator (10) can be pressed in a constant direction regardless of the position of the finger pressing the other end of the second main body (120) (i.e., the position of the user's thumb on the other end surface of the second main body (120) on the XY plane) and the angle at which the other end of the second main body (120) is pressed.

[0112] Therefore, in the case of the powder applicator (10) according to one embodiment, since the user can apply uniform pressure regardless of the position at which the pressure is applied to the powder applicator (10) to spray the powder, it may be advantageous to operate the powder applicator (10) to discharge a constant amount of powder.

[0113] In addition, as the second main body (120) and the second sub-body (310) move in the third direction (Z) with respect to the first main body (110) and the first sub-body (210), respectively, the plunger (320) and the spring (330) also move in the third direction (Z), and the plunger (320) can move by the amount of space occupied by the powder discharged from the powder reservoir (200) by the external force applied to the second main body (120) and the elastic force of the spring (330).

[0114] When the powder applicator (10) is designed to spray a plurality of times, the powder reservoir (200) can be maintained in a state filled with powder without any empty space by the plunger (320) before all of the powder filled in the powder reservoir (200) is sprayed. Therefore, in the case of the powder applicator (10) according to one embodiment, it is advantageous to maintain a constant amount of powder sprayed according to the plurality of times and to improve the accuracy of the timing at which the powder is sprayed.

[0115] When the external force applied to the other end of the second main body (120) is released, the second main body (120) and the second sub-body (310) can be moved in the opposite direction of the third direction (Z) with respect to the first main body (110) and the first sub-body (210) by the elastic force of the spring, respectively, and can be restored to the original position before the external force was applied to the second main body (120). Even in this case, the plunger (320) can still be maintained without a change in position in the internal space of the powder reservoir (200) so that the powder reservoir (200) is filled with powder without any empty space therein. In addition, since the filter (400) is arranged between the air reservoir (100) and the powder reservoir (200), the movement of powder from the powder reservoir (200) to the air reservoir (100) can be blocked.

[0116] The powder applicator (10) can repeat the above-described powder discharging process a preset number of times. When the powder applicator (10) has discharged all of the filled powder, the plunger (320) can come into contact with one end surface of the internal space of the powder reservoir (200), as illustrated in FIG. 7. To this end, the elastic coefficient of the spring (330) can be designed to have an elasticity that allows the plunger (320) to come into contact with one end surface of the internal space of the powder reservoir (200) as the powder filled in the powder applicator (10) is discharged.

[0117] FIGS. 8 to 10 are cross-sectional views illustrating an operating method of a powder applicator according to another embodiment of the present invention.

[0118] The powder applicator (11) according to FIGS. 8 to 10 differs from the embodiment of FIGS. 5 to 7 in that the air reservoir (100) further includes a bellows member (130'). In FIGS. 8 to 10, the differences from the embodiment of FIGS. 5 to 7 will be mainly described.

[0119] Referring to FIGS. 8 to 10, a bellows member (130') of a powder applicator (11) according to another embodiment of the present invention can be placed between the first main body (110') and the second main body (120').

[0120] The bellows member (130') may have a structure that wrinkles and folds when force is applied in the third direction (Z). The bellows member (130') may have elasticity in the third direction (Z). For example, before an external force is applied to the powder applicator (11), the bellows member (130') has an elastic equilibrium state, but when an external force is applied in the third direction (Z), it may have elasticity to return to the elastic equilibrium state.

[0121] The first main body (110') according to the present embodiment may have a smaller width in the third direction (Z) than the first main body (110) according to the embodiments of FIGS. 5 to 7. In another embodiment derived from the present embodiment, the width in the third direction (Z) of the second main body (120') may be smaller than the width in the third direction (Z) of the second main body (120) according to the embodiments of FIGS. 5 to 7, but is not limited thereto.

[0122] The first main body (110') and the second main body (120') may have substantially the same diameter and may not overlap in the XY plane. In this case, one end and the other end of the bellows member (130') in the third direction (Z) may have a diameter for being coupled and fixed to the first main body (110') and the second main body (120'), respectively. As another example, the first main body (110') and the second main body (120') may have different diameters, and the bellows member (130') may also have a diameter for being coupled and fixed to the first main body (110') and the second main body (120'), respectively. Accordingly, the bellows member (130') may not have a uniform width in the second direction (Y) in the third direction (Z).

[0123] When the powder applicator (11) according to FIGS. 8 to 10 is subjected to an external force in the third direction (Z) by the user for use, the bellows member (130') is folded into a foldable structure by being wrinkled, and the first main body (110') and the second main body (120') can be moved to be adjacent to each other in the third direction (Z). Accordingly, the pressure of the air filled inside the air reservoir (100') increases, and as described with reference to FIGS. 5 to 7, the air with increased pressure can be introduced into the powder reservoir (200) through the air supply passage (230) to transport the powder to the powder trap (PT) and the discharge port (500).

[0124] In the case of the powder applicator (11) according to the embodiments of FIGS. 8 to 10, it may be advantageous to control the amount of powder sprayed to the powder applicator (11) by controlling the elasticity of the bellows member (130') in the third direction (Z). In addition, similarly to the embodiments of FIGS. 5 to 7, when a force in the third direction (Z) is applied to the powder applicator (11), since the first sub-body (210) and the second sub-body (310) slide each other in the third direction (Z) while at least partially overlapping and fitting together, the user can press in a constant direction regardless of the position of the finger pressing the other end of the second main body (120) and the angle at which the other end of the second main body (120) is pressed.

[0125] FIGS. 11 to 13 are cross-sectional views for explaining an operating method of a powder applicator (12) according to another embodiment of the present invention. The powder applicator (12) may be implemented by omitting the second sub-body (310) from the operating unit (300) and may have the same operating principle as the powder applicator of FIGS. 14 to 17, for example.

[0126] FIG. 11 is a drawing showing a powder applicator (12) in a state where the powder is kept sealed by a blocking member (700) before the powder applicator (12) is used, FIG. 12 is a drawing showing a process in which powder filled in the powder applicator (12) is discharged as an external force is applied to the air reservoir (100) and the operating part (300), and FIG. 13 is a drawing showing the powder applicator (12) after all powder filled in the powder reservoir (200) is discharged.

[0127] Referring to FIGS. 11 to 13, the second main body (120) according to the present embodiment may have a second body portion formed of a bellows member. For example, the second body portion may be a bellows member having a shape extending from the other end of the first body portion in the third direction (Z). Accordingly, the second catch portion (122) of the second main body (120) of the embodiments of FIGS. 5 to 7 may be omitted in the present embodiment. The second body portion may be a bellows member having a constant width in the third direction (Z), but may also be formed in a tapered shape in which the width in the third direction (Z) changes, as illustrated in FIG. 14.

[0128] In addition, the first main body (110) may be entirely transparent or partially transparent, and the first main body (110) may have a constant diameter or a tapered shape formed so that the width in the third direction (Z) changes. In addition, the handle portion (114) may be symmetrical or asymmetrical, and may have a structure that protrudes outward from the first main body (110) or may be formed as a separate structure from the first main body (110) and coupled to one end of the first main body (110).

[0129] A spring (330) can be fixed or spaced on the inner side of the second body part of the above bellows member shape.

[0130] Hereinafter, a method of operating a powder applicator (12) according to one embodiment will be described with reference to FIGS. 11 to 13. In FIGS. 11 and 12, the powder filled in the powder reservoir (211) is omitted for convenience of explanation, but the space between the plunger (320) and the powder trap may be filled with powder.

[0131] First, referring to FIG. 11, a powder applicator (12) according to one embodiment may have a blocking member (700) coupled to a discharge port (500) to ensure the airtightness of powder filled in a powder reservoir (200) before being used by a user. In addition, before the powder applicator (12) is used, a spring (330) may be in a compressed state with a length shorter than the length of the spring in an equilibrium state. As described below, as powder is discharged by the powder applicator (12), the compressive force applied to the spring (330) decreases, and the third direction (Z) length of the spring (330) may become longer.

[0132] According to another embodiment, a powder applicator (12) may be configured such that before being used by a user, the spring (330) is spaced apart from the inside of a second main body (120) in the shape of a bellows member and may be in an uncompressed equilibrium state, and when an external force is applied to the other end of the second main body (120), the spring (330) is compressed and moves forward in the third direction (Z), and when the external force applied to the other end of the second main body (120) is released, the compressive force applied to the spring (330) is reduced and the spring (330) may be restored to its original equilibrium length.

[0133] Thereafter, for use, the user can separate the blocking member (700) from the discharge port (500) and attach a spraying member (700) suitable for the area where the powder is to be applied to the discharge port (500).

[0134] In this case, even if one end of the discharge port (500) is opened to the outside as the injection member (700) is coupled to the discharge port (500), the powder applicator (12) according to one embodiment can prevent powder from being discharged from the powder applicator (12) unintentionally in a situation such as when the discharge port (500) faces the direction in which gravity acts or when an external action such as vibration is applied to the powder applicator (12), because the discharge port (500) includes a powder trap.

[0135] Next, the user can use the handle (114) to support the powder applicator (12) so that it does not move in the third direction (Z), and apply an external force to the other end of the bellows member, which is the second main body (120), to spray the powder filled in the powder reservoir (200).

[0136] For example, a user can support one end surface of the handle part (114) using the index and middle fingers of one hand and press the other end of the bellows member, which is the second main body (120), with the thumb of the same hand. Accordingly, as illustrated in FIGS. 11 and 12, the powder applicator (12) causes the bellows member, which is the second main body (120), to contract toward the first main body (110), and the air filled in the air reservoir (100) is compressed by increasing pressure, and the compressed air can be supplied into the powder reservoir (200) through the air supply passage (230) via the filter (400). The plunger (320) can pressurize the powder filled in the powder reservoir (200).

[0137] The powder filled in the powder reservoir (200) can be transported by the flow of air supplied through the air supply passage (230), passed through the powder trap, and applied to the patient's affected area through the discharge port (500) and the spray member (600).

[0138] The powder applicator of the present invention is not limited to the specific examples described and illustrated above, and may be formed by mixing the configurations described in each specific example. For example, a powder applicator according to another embodiment may be basically the same as the embodiment of FIG. 14, and the shape of the handle portion and / or the shape of the second body portion may be the same as those illustrated in FIGS. 15 to 17. In addition, according to another embodiment, the plunger (320) may be formed by integrally forming the packing member and the connecting member.

[0139] Fig. 14 is a schematic perspective view of a powder applicator (13) according to another embodiment of the present invention.

[0140] The embodiment of Fig. 14 differs from the embodiments of Figs. 5 to 7 in that the position and shape in which the handle portion (114'') of the first main body (110'') is formed and the second body portion of the second main body (120'') is implemented as a bellows member. In Fig. 14, the differences from the embodiments of Figs. 5 to 7 will be mainly described.

[0141] Referring to FIG. 14, the second main body (120'') according to the present embodiment may have a second body portion formed of a bellows member. For example, the second body portion may be a bellows member having a shape extending from the other end of the first body portion in the third direction (Z). Accordingly, the second catch portion (122) of the second main body (120) of the embodiments of FIGS. 5 to 7 may be omitted in the present embodiment. The second body portion may be a bellows member having a constant width in the third direction (Z), but may be formed such that the width in the third direction (Z) varies, as illustrated in FIG. 14.

[0142] A spring (330) can be fixed or spaced on the inner side of the second body part of the above bellows member shape.

[0143] The handle portion (114'') of the first main body (110'') may be formed at the other end of the first body portion in the third direction (Z). For example, in order to transmit force and ensure stability when the second body portion, which is formed of a bellows member and extends from the other end of the first body portion, is operated, the handle portion (114'') may have a shape in which at least a portion of the circumference of the other end of the first body portion protrudes laterally. The degree to which the handle portion (114'') protrudes from the other end of the first body portion and the shape thereof may be designed in various ways. For example, the handle portion (114") may protrude from the side of the other end of the first body portion in the second direction (Y) and in the opposite direction of the second direction (Y), and may have an I shape crossing the first body portion when viewed in the third direction (Z). The portions protruding in the second direction (Y) and in the opposite direction of the second direction (Y) may be symmetrical or asymmetrical to each other.

[0144] Meanwhile, in the present embodiment, the operating unit (300) may be implemented by omitting the second sub-body (310).

[0145] Fig. 15 is a schematic perspective view of a powder applicator (14) according to another embodiment of the present invention. Fig. 16 is a cross-sectional view of the powder applicator (14) of Fig. 15. Fig. 17 is a perspective view showing an example in which a blocking member (700"') according to another embodiment of the present invention is applied to the powder applicator (14) of Fig. 15.

[0146] The embodiments of FIGS. 15 to 17 differ from the embodiment of FIG. 14 in that the shape of the first body portion of the first main body (110'''), the shape of the handle portion (114'''), the shape of the filter (400'''), and the shape of the blocking member (700''') are modified, and the second body portion of the second main body (120''') is formed as a bellows member having a constant width in the third direction (Z). In FIGS. 15 to 17, the differences from the embodiment of FIG. 14 will be mainly described.

[0147] First, referring to FIGS. 15 and 16, the first body portion of the first main body (110''') according to the present embodiment may have a shape whose width changes in the third direction (Z). For example, the first body portion may have a shape whose area on the XY plane increases from one end to the other end, and although not limited thereto, when viewed in the first direction (X), the first body portion may have a triangular shape on the plane. In this case, when air is supplied to the powder reservoir (200) through the air supply passage (230) from the air reservoir (100''') by air pressure, the structure may have an area on one end side of the air reservoir (100''') that is smaller than the area on the other end side in the third direction (Z), which may be advantageous in improving air supply efficiency. Additionally, the filter (400''') may have a shape that can be placed inside the first main body (110''') having such a shape.

[0148] In addition, the handle portion (114''') may be implemented so that the overall shape of the powder applicator (13) has a T-shape or a gun shape. The handle portion (114''') according to the present embodiment may be advantageous in improving the stability of the operation of the powder applicator (14) by improving the grip and support when the powder applicator (14) is used by a user.

[0149] Referring to Fig. 17, the blocking member (700''') may have a shape that closes the discharge port (500), but its outer shape may have a shape that provides a sense of unity with the first body part. For example, the area on the XY plane of the other end of the blocking member (700''') in the third direction (Z) is substantially the same as the area on the XY plane of one end of the first body part, and the blocking member (700''') may have a shape in which the area on the plane decreases as it goes in the third direction (Z).

[0150] In addition, a separation structure (710''') may be formed on at least a portion of the other end of the blocking member (700''') so that the blocking member (700''') can be easily separated from the discharge port (500). The separation structure (710''') may have a shape in which at least a portion of the other end of the blocking member (700''') protrudes laterally on the XY plane, but is not limited thereto.

[0151] Even in the case of the embodiments according to FIGS. 14 to 17, since the air flow for transporting the powder is introduced through the air supply passage (230) arranged adjacent to the position where the discharge port (500) and the powder trap (PT) are arranged, the force for moving the powder filled in the powder reservoir (200) to the discharge port (500) through the powder trap (PT) can be efficiently transmitted, and thus, the flowability of the powder can be increased, which can be advantageous in effectively discharging the powder.

[0152] In addition, when the air flow for discharging the powder is introduced into the other end of the powder reservoir (200), for example, the part where the powder is pressurized by the plunger (320), the air introduced into the powder reservoir (200) is resisted by the other end of the powder trap (PT), whereas the powder applicator (13, 14) according to the embodiments can be advantageous in more efficiently discharging the powder filled in the powder reservoir (200) by preventing air resistance by the powder trap (PT) and separating the direction of air introduction from the direction in which the powder is pressurized by the plunger (320).

[0153] Although the embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential characteristics of the present invention. These embodiments are not intended to limit the invention but are merely illustrative, and should be considered from an illustrative rather than a restrictive perspective. Although specific terminology has been used in this specification, it has been used only for the purpose of explaining the concept of the present invention and has not been used to limit the meaning or the scope of the present invention as set forth in the claims. Therefore, the embodiments described above should be understood to be illustrative in all respects and not restrictive.

Claims

1. An air reservoir comprising a first main body and a second main body which are connected to each other and form an outer shape of a powder applicator, and filled with air; A powder reservoir including a first sub-body disposed between a discharge port through which powder is discharged and an operating unit, the first sub-body including a space for filling the interior with powder and disposed inside the first main body, and an air supply passage formed in a portion of the first sub-body adjacent to the discharge port and including at least one opening; A filter arranged in correspondence with the air supply passage between the powder reservoir and the air reservoir, blocking movement of powder between the powder reservoir and the air reservoir but allowing movement of air; and A powder applicator comprising an operating unit including a plunger arranged inside the powder reservoir and dividing the space of the first sub-body.

2. In paragraph 1, A powder applicator, wherein the operating portion further includes a second sub-body that is arranged to be slidable relative to the powder reservoir and at least partially overlaps the powder reservoir.

3. In paragraph 1 or 2, A powder applicator, wherein the operating part further includes a spring disposed between the plunger and the end of the first sub-body to apply pressure to the powder disposed in the powder reservoir through the plunger.

4. In paragraph 3, A powder applicator, wherein the spring has elasticity to allow the plunger to come into close contact with one end surface of the internal space of the powder reservoir.

5. In paragraph 3, A powder applicator, wherein the plunger is pressurized by the spring to pressurize the powder.

6. In paragraph 1 or 2, A powder applicator further comprising a blocking member coupled to the discharge port to block contact between the powder and the external environment.

7. In paragraph 1 or 2, A powder applicator, wherein the air reservoir further includes a handle portion having a structure protruding outwardly from the first main body or a handle portion formed as a separate structure from the first main body and coupled to one end of the first main body.

8. In paragraph 1, When an external force is applied in one direction to the above second main body, The above second main body is contracted in the direction of the above first main body, The air filled in the above air reservoir increases in pressure and is supplied to the powder reservoir through the air supply passage, A powder applicator, wherein the plunger pressurizes powder filled in the powder reservoir.

9. In paragraph 1, A powder applicator, wherein the first main body and the second main body are arranged to overlap at least partially, and the second main body is a bellows member having a structure that is wrinkled and folded.

10. In paragraph 2, When an external force is applied in one direction to the above second main body, The second main body and the second sub-body move toward the first main body and the first sub-body, respectively, The air filled in the above air reservoir increases in pressure and is supplied to the powder reservoir through the air supply passage, A powder applicator, wherein the plunger pressurizes powder filled in the powder reservoir.

11. In paragraph 2, A powder applicator wherein the first main body and the second main body are arranged to overlap at least partially, the first main body and the second main body each include a first engaging portion and a second engaging portion that are mutually engaged at end sides adjacent to each other, and the first main body and the second main body are mutually slidable.

12. In paragraph 2, The above air reservoir further comprises a bellows member, A powder applicator, wherein the bellows member is arranged between the first main body and the second main body and has a structure in which it is folded in one direction.

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