Patent Publication Number: US-2021169199-A1

Title: Cosmetic container

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to and the benefit of Korean Patent Application No. 10-2019-0161852 filed in the Korean Intellectual Property Office on Dec. 6, 2019, and Korean Patent Application No. 10-2020-0038363 filed in the Korean Intellectual Property Office on Mar. 30, 2020, the entire contents of which are incorporated herein by reference. 
     BACKGROUND OF THE INVENTION 
     (a) Field of the Invention 
     The present disclosure relates to a cosmetic container. 
     (b) Description of the Related Art 
     For example, a power type of cosmetic is filled and stored in a container, and is used by discharging a certain amount of contents from the container at the time of putting on makeup. In general, the power type of cosmetic is applied on the skin by using a brush. 
     In recent years, a cosmetic container having a brush integrally provided therein has been developed for more convenient usage. The cosmetic container having such an integrated brush includes an opening/closing device for selectively opening and closing a gap between the brush and a powder accommodation space. Thus, the powder can be supplied to the brush by opening the opening/closing device if necessary. When the cosmetic container is not in use, the discharge of the powder can be prevented by closing the opening/closing device. 
     The present inventors have developed a cosmetic container having a reduced number of parts and a simplified configuration, which is improved in configuration as compared with a conventional opening/closing device. Korean Registration Patent No. 10-1313743 as a patent registration document discloses a cosmetic container which has been developed by the present inventors. 
     As the usage of the power type of cosmetic gradually increases, there is an increasing requirement for cosmetic container with a simplified configuration and improved usability, which is capable of performing discharging and blocking of the powder in a reliable manner. In this regard, providing a more advanced cosmetic container to meet such a requirement and an intensely competitive market provides a number of benefits to the user. 
     SUMMARY 
     Problem to be Solved 
     The object of the present disclosure is to provide a cosmetic container which is easy to manufacture with a relatively simplified configuration. 
     The object of the present disclosure is to provide a cosmetic container of which an opening/closing device is convenient to use. 
     The object of the present disclosure is to provide a cosmetic container which is capable of ensuring discharging and blocking of powder and preventing the powder from leaking out. 
     Solution to Problem 
     A cosmetic container of the present embodiment may include a container body in which a powder is accommodated, and a brush part coupled to an upper end of the container body, and including a powder brush provided therein. 
     The cosmetic container may further include an opening/closing part coupled to the upper end of the container body and provided therein to selectively discharge the powder. 
     The cosmetic container may further include an air injection part provided in a lower end of the container body to forcibly inject the powder into the brush part. 
     The cosmetic container may further include a cap detachably coupled to an upper end of the brush part to cover the powder from the outside. 
     The opening/closing part may include: a housing coupled to the upper end of the container body to form constitute an outer shape of the opening/closing part and having at least one or more discharge holes, through which the powder is discharged, and formed at a lower end of the housing along a circumferential direction with respect to a central axis; a rotational body rotatably provided inside the housing while being coaxially coupled to the housing, and having transfer holes formed at a lower end of the rotational body, wherein the powder brush is provided in an upper end of the rotational body, the powder is supplied into the powder brush through the transfer holes which are in communication with the discharge holes, and the rotational body configured to rotate relative to the housing so that the transfer holes and the discharge holes are in a selective communication with each other or positionally deviated from each other; and a sleeve provided between the housing and the rotational body to slidably move upward and downward relative to the housing, wherein the rotational body is rotated clockwise and counterclockwise with the upward and downward movement of the sleeve, and the discharge holes and the transfer holes are brought into the selective communication with each other with the upward/downward movement of the sleeve. 
     The opening/closing part may further include elastic pieces which are formed in a lower portion of the sleeve and are brought into close contact with the rotational body in an elastic manner, and lock pockets which are formed in the upper portion of the rotational body such that the elastic pieces are locked into the respective lock pockets when the sleeve is raised to the highest position. 
     The opening/closing part may include: vertical grooves and protrusions formed between an inner peripheral surface of the housing and an outer peripheral surface of the sleeve so as to face each other and be engaged with each other, wherein the protrusions configured to move along the vertical grooves; and cam grooves and cam protrusions formed between an outer peripheral surface of the rotational body and an inner peripheral surface of the sleeve so as to face each other and be engaged with each other, wherein the cam protrusions configured to move along the cam grooves. The vertical grooves may be formed to linearly extend along an axial direction so that the sleeve is vertically moved upward and downward relative to the housing, and the cam grooves may be formed to extend in the axial direction and are formed obliquely with respect to the axial direction to deviate both leading ends of each of the cam grooves from each other in a circumferential direction, so that the rotational body is rotated in the circumferential direction with the upward/downward movement of the sleeve. 
     Each of the cam grooves may include an inclined portion formed obliquely with respect to the axial direction, and linear portions extending from the inclined portion in the axial direction to constitute the both leading ends of each of the cam grooves. 
     Each of the cam grooves may be configured to be formed in a spiral shape along the axial direction. 
     The rotational body may include a rotational shaft formed on the lower end thereof to protrude along the central axis. An insertion hole into which the rotational shaft is inserted may be formed in the lower end of the housing. The rotational shaft may have a recessed portion formed to protrude outward along an outer peripheral surface of the rotational shaft. The rotational shaft may have a groove portion formed along an inner peripheral surface thereof such that the protrusion is locked into the groove portion. The recessed portion may be fitted into and coupled to the groove portion. 
     The cosmetic container may further include a sealing part tightly provided between the rotational body and the housing so as to prevent a gap from being generated between the discharge holes and the transfer holes. 
     The sealing part may include a polygonal sealing pad coupled to the rotational body by being inserted to a rotational shaft, and guide bars formed to protrude from the lower end of the rotational body and configured to regulate a rotation of the sealing pad, the polygonal sealing pad having holes formed at positions corresponding to the transfer holes. 
     The sealing pad may have a flesh portion formed to have an increased thickness in a peripheral portion of the sealing pad or around the holes, so that the sealing pad is brought into tight contact with surfaces of the rotational body and the housing through the flesh portion. 
     The cosmetic container may further include a filter provided below the discharge holes of the housing and configured to filter the powder to be discharged through the discharge holes. 
     The filter may be a single sheet structure with a grid-like pattern. 
     The air injection part may include: a holder provided in an opened portion of the lower end of the container body; a cover provided on an upper end of the holder; an air tube, through which air is transferred, formed on the cover to extend toward an upper portion of the container body; a button provided in a lower end of the holder to protrude outwardly so that the button is pressed externally; an elastic member provided between an inner wall of the holder and the button to apply an elastic resilience with respect to the button; and a check valve provided on an upper end of the air tube and configured to inject the air toward the discharge holes of the container body by being opened and closed by an air pressure, generated with the operation of the button, in the air tube. 
     The cosmetic container may further include a piston member provided in the button and having a skirt portion whose outer diameter is increased as it goes upward so that the piston member is brought into close contact with an inner peripheral surface of the holder in an elastic manner. 
     The check valve may be formed of an elastic material. A lower end of the check valve may be opened to be in communication with the air tube. The check valve may be formed in a tapered conical shape having both membranes which are gradually reduced in thickness upward, and may have a configuration in which a slit-liked cut line is formed in an upper end of the check valve as a tip portion, and the both membranes are in contact with each other through the cut line. 
     The air injection part includes: a holder provided at the lower end of the container body; a button supported by the holder, having a lower end protruding outward, and provided to protrude outwardly to be pressed externally; and a pumping member provided in a resilient manner between the container body and the button, having an upper portion extending toward discharge holes of the container body and an internal space formed to allow an air to flow thereinto, and configured to be elastically deformed by a pressing force of the button and inject the air inside the pumping member toward the discharge holes of the container body. 
     The pumping member includes: an elastic deformation portion provided to be elastically deformed when the button is pushed, configured to apply a pressure to the inside of the pumping member so as to discharge outward the air inside of the pimping member, and configured to apply an elastic force for returning the button to its original position; an upper pad integrally formed on an upper portion of the elastic deformation portion and formed to protrude outward so that the upper pad is brought into close contact with an inner flange formed on an inner surface of the container body; a lower pad integrally formed on a lower portion of the elastic deformation portion and formed to protrude outward so that the lower pad is brought into close contact with an upper end of the button; an insertion portion integrally formed on the lower portion of the elastic deformation portion, communicating with an inside of the elastic deformation portion, extending downward from the lower pad, having a cylindrical shape with an opened lower end, and provided to be inserted into the button so that the insertion portion is brought into close contact with an inner peripheral surface of the button in an elastic manner; an air tube integrally formed on the upper portion of the elastic deformation portion, formed to extend upward along an axial direction, and communicating with the inside of the elastic deformation portion to convey the air; and a check valve integrally formed on an upper end of the air tube, configured to be opened and closed by an internal air pressure so that the air is injected outward from the inside of the air tube. 
     The pumping member may be formed of a material such as silicon, rubber, or the like. 
     The insertion portion may include a fitting portion fitted to an inner surface of the button, and a skirt portion formed to extend downward from the fitting portion, and having an outer diameter becoming larger downward. 
     The check valve may be integrally formed on the upper end of the air tube and may be formed in a tapered conical shape having both membranes which are gradually reduced in thickness upward. The check valve may have a configuration in which a slit-liked cut line is formed in an upper end of the check valve as a tip portion, and the both membranes are in contact with each other through the cut line. 
     The button may be fitted to and coupled to the insertion portion of the pumping member through an opened upper portion of the button, and may be provided to protrude outward through a hole formed in the holder. The button may include a flange formed on an upper portion thereof to protrude outward so as to be engaged with the hole, and at least one or more trench grooves formed at intervals in an upper end in contact with the lower pad of the pumping member to introduce the air into the inside of the button through gap formed between the button and the lower pad. 
     The at least one or more trench grooves may be formed to extend along an inner circumferential surface of the button at the upper portion of the button. 
     The container body may include an inner flange formed on an inner peripheral surface thereof to protrude toward a center. The air tube of the pumping member may extend upward through a central hole of the inner flange, and the upper pad of the pumping member may be brought into close contact with a lower end of the inner flange. 
     The pumping member may further include a stepped member spaced apart from the upper pad and formed to protrude outward of the air tube. The stepped member may be brought into close contact with an upper end of the inner flange. The pumping member may be coupled with the inner flange while the inner flange is fitted between the stepped member and the upper pad. 
     An outer diameter of the air tube positioned between the stepped member and the upper pad may be set greater than or equal to an inner diameter of the central hole of the inner flange. 
     The gap between the stepped member and the upper pad may be set smaller than or equal to a thickness of the inner flange. 
     An upper end of the stepped member may form an inclined surface whose diameter becomes smaller as it goes upward. 
     A distance between the upper pad and the lower pad may be larger than that between the inner flange and the upper end of the button in a state in which the button is not pushed. 
     Effects of the Present Disclosure 
     According to the present disclosure in some embodiments, it is possible to provide advantages of more easily using a cosmetic container with a simplified configuration, and of being easy to manufacture the cosmetic container. 
     Accordingly, it is possible to achieve a reduction in manufacturing costs through the easy-to-manufacture, thus improving price competitiveness of the product. 
     Further, it is possible to ensure blocking and opening of powder supply holes and prevent the powder from leaking out from the cosmetic container even if the cosmetic container is in use for a long period of time. 
     Further, it is possible to minimize a phenomenon that clogging of the powder supply holes is generated and more effectively supply the powder. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic exploded perspective view illustrating a configuration of a cosmetic container according to an embodiment. 
         FIG. 2  is a schematic cross-sectional view illustrating an assembled state of the cosmetic container according to the embodiment. 
         FIG. 3  is a view specifically illustrating a configuration of a portion of the cosmetic container according to the embodiment. 
         FIG. 4  is a schematic cross-sectional view illustrating a configuration of an opening/closing part of the cosmetic container according to the embodiment. 
         FIG. 5  is a schematic view for explaining an operation of the opening/closing part of the cosmetic container according to the embodiment. 
         FIG. 6  is a schematic exploded perspective view showing a structure of an air injection part of the cosmetic container according to the embodiment. 
         FIG. 7  is a schematic cross-sectional view of a cosmetic container according to another embodiment. 
         FIG. 8  is a schematic exploded perspective view illustrating a configuration of a cosmetic container according to another embodiment. 
         FIG. 9  is a schematic cross-sectional view illustrating an assembled state of the cosmetic container according to the embodiment of  FIG. 8 . 
         FIG. 10  is a schematic exploded perspective view illustrating a configuration of an air injection part of the cosmetic container according to the embodiment of  FIG. 8 . 
         FIG. 11  is a schematic view for explaining an operation of the air injection part of the cosmetic container according to the embodiment of  FIG. 8 . 
         FIG. 12  is a schematic view illustrating an operation state in which the air injection part of the cosmetic container according to the embodiment of  FIG. 8  is operated. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, embodiments of the present invention will be described in detail. However, the embodiments are exemplary in all respects and are not restrictive. The present disclosure is merely defined by the scope of the appended claims. The embodiments described below may be modified in various forms without departing from the spirit and scope of the appended claims. In all the accompanying drawings, the same or similar components will be denoted by the same reference numerals. 
     The technical terms used herein are merely referred to specific embodiments and are not intended to limit the present disclosure. The singular terms used herein also include the plural terms unless the terms clearly represent the opposite meanings. The meaning of “includes” used herein refers to include certain characteristics, regions, integers, steps, operations, elements, and/or components and does not means that the presence or addition of other certain characteristics, regions, integers, steps, operations, elements, components, and/or groups is excluded. 
       FIG. 1  illustrates a configuration of a cosmetic container according to the present embodiment, and  FIG. 2  illustrates an assembled configuration of the cosmetic container. 
     In the following description, an axial direction refers to a direction in which the central axis line passes, and is defined as a Y-axis direction in  FIG. 2 . Above, an upper portion or an upward direction used herein refers to a direction oriented upward in the Y-axis direction when a powder brush is oriented upward as in  FIG. 2 , and below, a lower portion or a downward direction refers to a direction opposite the upward direction. 
     As shown in  FIGS. 1 and 2 , a cosmetic container  100  according to the present embodiment may include a container body  110 , a brush part  200 , and an air injection part  300 . 
     Further,  FIG. 7  illustrates another embodiment of the cosmetic container  100 . A cosmetic body  120  shown in  FIG. 7  is identical in structure to the cosmetic container  100  according to the embodiment of  FIG. 1 , except that the cosmetic body  120  of  FIG. 7  has a container configuration in which a lower end thereof is closed and an air injection part (see reference numeral  300  in  FIG. 1 ) is not provided. In  FIG. 7 , the same reference numerals denote the same configurations as those in  FIG. 1 , and a detailed description thereof will be omitted. 
     Hereinafter, the cosmetic container  100  according to the present embodiment will be described with reference to  FIG. 1 , and the description of the cosmetic container  100  according to another embodiment of  FIG. 7  will be omitted to avoid duplication. 
     As shown in  FIG. 1 , the container body  110  may have a cylindrical shape with an accommodation space defined therein. Cosmetic (hereinafter referred to as powder) in the form of a powder is filled into the accommodation space of the container body  110 . The shape of the container body  110  may be modified in various forms. 
     The container body  110  has a cylindrical configuration in which upper and lower ends are opened. The brush part  200  may be coupled to an upper end of the container body  110 , and the air injection part  300  may be coupled to a lower end of the container body  110 . The powder accommodated in the container body  110  is used by being discharged to the brush part  200 . The size and shape of the container body  110  may be changed in various sizes and shapes. 
     The brush part  200 , which is coupled to the upper end of the container body  110 , includes an opening/closing part  220  provided therein and configured to selectively discharge the powder therethrough. A powder brush  210  is provided on an upper end of the brush part  200 . 
     The cosmetic container  100  of the present embodiment may further include a cap  120  that is detachably coupled to the upper end of the brush part  200  to block the powder brush  210  from the outside. The cap  120  may be coupled to the brush part  200  to cover the powder brush  210  and protect the powder brush  210  from the outside. The powder brush  210  is a part configured to make gentle contact with the skin at the time of putting on makeup, and may be provided in a variety of other forms, such as a brush shape, a porous sponge shape and the like. 
     The opening/closing part  220  connects or disconnects between the container body  110  and the brush part  200  to selectively discharge the powder accommodated in the container body  110  to the powder brush  210 . 
     The opening/closing part  220  of the present embodiment may include a housing  230  with discharge holes  232  formed therein, a rotational body  240  with transfer holes  242  formed therein, and a sleeve  260  provided between the housing  230  and the rotational body  240 . 
     The housing  230  may be a cylindrical structure with an opened upper end. The housing  230  may be coupled to the upper end of the container body  110  to form an outer shape of the cosmetic container  100  in combination with the container body  110 . As an example, the housing  230  may be formed to have the same outer diameter as that of the container body  110 . 
     The housing  230  may be detachably coupled to the upper end of the container body  110 . For example, a male screw and a female screw may be formed on the upper end of the container body  110  and the lower end of the housing  230 , respectively, so that they are threadedly coupled to each other. The brush part  200  may be coupled to the container body  110  in various manners other than the threadedly-coupling manner, but is not particularly limited thereto. The cap  120  may be detachably coupled to the upper end of the housing  230 . 
     The discharge holes  232  are formed in the bottom surface of the housing  230  in a communication relationship with the container body  110  to discharge the powder therethrough. The discharge holes  232  may be arranged along a circumference direction at intervals around an axis coinciding with the center of the housing  230 . In the present embodiment, four discharge holes  232  may be arranged at an interval of 90 degrees. The number, size and position of discharge holes  232  may be variously changed. Vertical grooves (see reference numeral  234  in  FIG. 4 ) are formed in an inner peripheral surface of the housing  230  to linearly extend along the axial direction. The vertical grooves  234  are grooves used when being coupled to the sleeve  260 . Details thereof will be described again later. 
     The rotational body  240  is a cylindrical structure with an opened upper end and is inserted into the housing  230 . The transfer holes  242  through which the powder is discharged are formed in the bottom surface of the lower end of the rotational body  240  in a communication relationship with the discharge holes  232  formed in the housing  230 . The transfer holes  242  are arranged to correspond to the respective discharge holes  232  such that the transfer holes  242  and the discharge holes  232  are in communication with each other. 
     The rotational body  240  may be coaxially coupled to the bottom surface of the housing  230  so as to be rotatably mounted relative to the housing  230 . Thus, the rotational body  240  rotates relative to the housing  230  so that the discharge holes  232  can be opened or closed. When the rotational body  240  is rotated, the transfer holes  242  of the rotational body  240  are moved relative to the discharge holes  232  stating in a fixed state so that the transfer holes  242  are aligned with the respective discharge holes  232  to be in communication with each other, or so that the transfer holes  242  are positionally deviated from the discharge holes  232  to be not in communication with each other. Thus, the discharge holes  232  can be opened by aligning the transfer holes  242  with respect to the respective discharge holes  232 , or can be blocked by deviating the transfer holes  242  from the respective discharge holes  232 . 
     A transfer tube  244  having passages  246  formed to be connected to the transfer holes  242  may be formed to extend upward inside the rotational body  240 . The powder discharged from the discharge holes  232  may be supplied to an upper portion of the transfer tube  244  through the passages  246  of the transfer tube  244 , which are connected to the transfer holes  242 . 
     The powder brush  210  may be provided above the rotational body  240 . The powder brush  210  may be provided to be inserted into a space between the transfer tube  244  and an inner peripheral surface of the rotational body  240 . Thus, the powder may be discharged through the discharge holes  232  and the transfer holes  242 , and supplied to the powder brush  210  through the transfer tube  244 . 
     Cam grooves  250  are formed in an outer peripheral surface of the rotational body  240  to be inclined with respect to the axial direction. The cam grooves  250  are portions used when being coupled to the sleeve  260 , which will be described later. 
     In order to ensure the pivotable coupling between the rotational body  240  and the housing  230 , a rotational shaft  247  is formed on the lower end of the rotational body  240  to protrude along the central axis. Further, an insertion hole  236  through which the rotational shaft  247  is inserted is formed at the center of the bottom surface of the housing  230 . The rotational shaft  247  of the rotational body  240  is inserted into the insertion hole  236  of the housing  230 , so that the rotational body  240  is rotatable relative to the housing  230 . 
     In the present embodiment, the rotational shaft  247  may have a recessed portion  248  formed to protrude outward along an outer peripheral surface of the rotational shaft  247 , and the insertion hole  236  may have a groove portion  237  formed in an inner peripheral surface thereof so that the depressed portion  248  is locked into the groove portion  237 . Thus, when the rotational shaft  247  is fitted to the insertion hole  236 , the recessed portion  248  is engaged with the groove portion  237  so that the housing  230  and the rotational body  240  can be coupled to each other in a tighter manner. With this configuration, it is possible to prevent a gap from being generated between the discharge holes  232  formed in the housing  230  and the transfer holes  242  formed in the rotational body  240 , thus preventing the powder from leaking out from the housing  230  and the rotational body  240 . 
     As shown in  FIG. 3 , in the present embodiment, the cosmetic container  100  may further include a sealing part that is tightly provided between the rotational body  240  and the housing  230  so as to prevent a gap from being generated between the discharge holes  232  and the transfer holes  242 . 
     The sealing part may include a polygonal sealing pad  280  which is coupled to the rotational body  240  by being fitted into the rotational shaft  247 , and guide bars  284  formed to protrude from the lower end of the rotational body  240  so as to prevent the rotation of the sealing pad  280 . The sealing pad  280  has holes  282  formed at positions corresponding to the transfer holes  242 . 
     When the recessed portion  248  of the rotational shaft  247  is engaged with the groove portion  237  of the housing  230 , the sealing pad  280  is elastically pressed between the rotational body  240  and the housing  230  and is brought into close contact with the rotational body  240  and the housing  230 . Accordingly, the sealing pad  280  is brought into more close contact with the rotational body  240  and the housing  230 , which makes it possible to prevent the generation of the gap between the rotational body  240  and the housing  230 . 
     The sealing pad  280  may be formed of a material different from that of the rotational body  240  or the housing  230 . In the present embodiment, the sealing pad  280  may be formed of a material having an excellent elastic force and sealability. For example, the sealing pad  280  may be formed of rubber, urethane or silicon material. 
     The sealing pad  280  may be a plate-liked structure. A hole  283  into which the rotational shaft  247  of the rotational body  240  is inserted is formed at the center of the sealing pad  280 . The holes  282  are circumferentially arranged about the hole  283 . 
     The sealing pad  280  may be coupled to the lower end of the rotational body  240  by being fitted to the rotational shaft  247  of the rotational body  240 . The sealing pad  280  may have a polygonal shape such as rectangular and may be fixed by the guide bars  284  such that it is not freely rotated with respect to the rotational body  240  but is movable together with the rotational body  240 . 
     The guide bars  284  which correspond in size to the sealing pad  280  are formed to protrude from the lower end of the rotational body  240 , and support lateral ends of the sealing pad  280 . The sealing pad  280  is supported by the guide bars  284  in a state in which the holes  282  formed in the surface of the sealing pad  280  are aligned with the transfer holes  242  of the rotational body  240 . 
     The sealing pad  280  of the present embodiment may include a flesh portion  286  formed to have an increased thickness in the peripheral portion of the sealing pad  280  or the surrounding of the hole  283  and the holes  282 . Thus, the sealing pad  280  may be brought into tight contact with the surfaces of the rotational body  240  and the housing  230  through the flesh portion  286 . Accordingly, the surrounding of the hole  283  and the holes  282 , or the peripheral portion of the sealing pad  280  in which gap may be generated, can be further pressed by the flesh portion  286  of the sealing pad  280 , thus increasing tightness. 
     A filter  270  configured to filter the powder to be discharged through the discharge holes  232  may be further provided outside the bottom surface of the housing  230 . 
     The filter  270  may be a porous foam structure with open cells formed therein, which has a predetermined thickness. The filter  270  may be formed to have a size enough to cover the entire discharge holes  232 . Thus, the powder of a certain amount can be supplied to the brush part  200  through the filter  270  via the discharge holes  232  in the form of a powder of a constant size without being agglomerated. 
     In the present embodiment, the filter  270  may be replaced with various kinds of ones depending on the viscosity or the like of the powder accommodated in the cosmetic container. For example, in a case where the viscosity of the powder is low, a filter having small porous open cells may be mounted and used instead of the filter  270 . 
     The filter  270  may be positioned under the housing  230  by being engaged into a fitting bar  272  which is formed to extend from the lower end of the rotational body  240 . That is, the fitting bar  272  may be formed on the tip of the rotational shaft  247  of the rotational body  240  to extend inward the housing  230  through the insertion hole  236  of the housing  230  and to secure the filter  270 . The fitting bar  272  may include a conical protrusion  274  of a wedge-like shape which is integrally formed on the leading end of the fitting bar  272  and passes through a hole formed in the center of the filter  270 . A dick-shaped stopper  276  may be engaged with and coupled to the conical protrusion  274  to prevent the filter  270  from being separated from the fitting bar  272 . 
     The conical protrusion  274  of the fitting bar  272  may be forcibly fitted into a hole formed in the center of the stopper  276 . The stopper  276  is locked to the conical protrusion  274  and fixed to the fitting bar  272 . The stopper  276  is a member having a relatively larger diameter than that of the hole formed in the center of the filter  270 . Thus, the filter  270  is prevented from being dropped down from the fitting bar  272  by being locked to the stopper  276 . 
     If necessary, the filter  270  may be easily replaced with a new one by separating the stopper  276  and the filter  270  from the fitting bar  272 , installing the new filter on the fitting bar  272  and fixing the stopper  276 . 
     As described above, it is possible to easily replace the filter with a new one if necessary, thus optimally adjusting an amount of the powder to be discharged. 
     In some embodiments, although not shown herein, the filter may be a single layer of sheet structure with grid-like patterns formed therein. In such a structure, the powder does not exist on the filter in the course of filtering the powder. This makes it possible to minimize coagulating of the powder remaining on the filter or sticking of the remaining powder on the filter. 
     The sleeve  260  is provided between the rotational body  240  and the housing  230 . 
     The sleeve  260  is a cylindrical structure with upper and lower ends opened, and is provided to be movable upward and downward along the axial direction relative to the housing  230 . The powder brush  210  may be gathered as the sleeve  260  slides upward relative to the housing  230 . The powder brush  210  may be expanded to become a usable state as the sleeve  260  slides downward relative to the housing  230 . In addition, the sleeve  260  moves upward and downward relative to the housing  230  while being operatively coupled between the housing  230  and the rotational body  240 . The discharge holes  232  and the transfer holes  242  may be in selective communication with each other by rotating the rotational body  240  clockwise or counterclockwise. 
     That is, the opening/closing part  220  of the present embodiment enables the transfer holes  242  and the discharge holes  232  to be in communication with each other or to be disconnected from each other without additional operations by moving the sleeve  260  upward or downward. 
     As shown in  FIG. 4 , in the present embodiment, the vertical grooves  234  may be formed in the inner peripheral surface of the housing  230 , and outwardly-protruded protrusions  262  may be formed in the outer peripheral surface of the sleeve  260  so as to be engaged with the respective vertical grooves  234 . The vertical grooves  234  are formed to continuously extend from the upper end of the housing  230  to the lower end thereof along the axial direction. At least one or more vertical grooves  234  may be formed in the inner peripheral surfaces of the housing  230 . In the present embodiment, the two vertical grooves  234  are arranged in a 180-degree rotationally symmetric manner. The protrusions  262  are formed to protrude outward from the outer peripheral surface of the sleeve  260  at positions corresponding to the vertical grooves  234 . The protrusions  262  may be formed in the lower portion of the sleeve  260 . 
     The protrusions  262  are fitted into the respective vertical grooves  234  so that the rotation of the sleeve  260  relative to the housing  230  is restricted. Thus, the sleeve  260  can be merely moved upward and downward along the vertical grooves  234  without rotating relative to the housing  230 . 
     Although in the present embodiment, the configuration in which the vertical grooves  234  and the protrusions  262  are formed in the housing  230  and the sleeve  260 , respectively, has been described, the present disclosure is not limited thereto and is also applicable to the counter configuration. For example, the vertical grooves  234  may be formed in the outer peripheral surface of the sleeve  260  and the protrusions  262  may be formed in the inner peripheral surface of the housing  230  such that the vertical grooves  234  and the protrusions  262  are engaged with each other. 
     The coupling configuration between the rotational body  240  and the sleeve  260  will be described. As shown in  FIGS. 4 and 5 , the cam grooves  250  may be formed in the outer peripheral surface of the rotational body  240 , and cam protrusions  264  may be formed in the inner peripheral surface of the sleeve  260  to be engaged with the respective cam grooves  250 . 
     Each of the cam grooves  250  is formed to continuously extend from the upper end of the rotational body  240  to the lower end thereof in the axial direction. At least one of more cam grooves  250  may be formed in the outer peripheral surface of the rotational body  240 . In the present embodiment, the two cam grooves  250  are arranged in a 180-degree rotationally symmetric manner. 
     Each of the cam grooves  250  extends in the axial direction and may be formed obliquely with respect to the axial direction such that both ends of each cam groove  250  are positionally deviated from each other along the circumferential direction. Thus, when the sleeve  260  slides upward and downward, the cam protrusions  264  of the sleeve  260  are moved upward and downward along the respective cam grooves  250  so that the rotational body  240  rotates clockwise and counterclockwise relative to the sleeve  260 . 
     Instead of the above-described configuration, the present disclosure is also applicable to a configuration in which the cam grooves  250  are formed in the inner peripheral surface of the sleeve  260  and the cam protrusions  264  are formed in the outer peripheral surface of the rotational body  240 . With such a configuration, when the sleeve  260  moves upward and downward, the rotational body  240  can be rotated clockwise and counterclockwise along the cam grooves  250  by allowing the cam protrusions  264  to be engaged with the respective cam grooves  250 . 
     In the present embodiment, each cam groove  250  may include an inclined portion  252  formed obliquely with respect to the axial direction, and linear portions  254  which extend along the axial direction from the inclined portion  252  to constitute both end portions of the cam groove  250 . The inclined portion  252  and the linear portions  254  are formed integrally with each other to constitute one cam groove  250 . With this configuration, the rotational body  240  is rotationally moved when the cam protrusion  264  passes through the inclined portion  252  of each cam groove  250 , while the rotational body  240  is stopped and only the sleeve  260  may move upward and downward when the cam protrusion  264  passes through the linear portions  254  of each cam groove  250 . 
     As described above, by forming the linear portions  254  at both ends of the inclined portion  252 , it becomes possible to accurately set the rotational position of the rotational body  240 . That is, when the cam protrusion  264  reaches the linear portion  254  of the cam groove  250 , the rotational body  240  is no longer rotated even if the sleeve  260  is moved upward and downward. Thus, the rotational body  240  can be rotated to a set position and maintained in a state available after the rotation, regardless of a difference in level of the upward/downward movement of the sleeve  260 . This makes it possible to accurately perform the opening and closing of the discharge holes  232 . 
     Instead of the configuration described above, a configuration in which each cam groove  250  is formed in a spiral shape as a whole along the axial direction may be employed. With this configuration, the rotational body  240  having the cam grooves  250  formed therein can be spirally rotated clockwise and counterclockwise relative to the sleeve  260  when the cam protrusions  264  pass through the cam grooves  250 , thus opening and closing the discharge holes  232 . 
     In the present embodiment, when the sleeve  260  is moved downward, the powder brush  210  is exposed and the discharge holes  232  are opened to be brought into a usable state. Meanwhile, when the sleeve  260  is moved upward, the sleeve  260  surrounds the powder brush  210  to protect the powder brush  210  and the discharge holes  232  are blocked to cutoff the discharge of the powder. 
     As shown in  FIG. 3 , the sleeve  260  may further include elastic pieces  266  formed in the lower portion thereof. Lock pockets  267  may be further formed in the upper portion of the rotational body  240  such that the elastic pieces  266  are locked into the respective lock pockets  267 . Each of the elastic pieces  266  may be formed in a slit formed by cutting a portion of the leading end of the sleeve  260  and may be brought into close contact with the rotational body  240  in an elastic manner. 
     The lock pockets  267  are formed at positions corresponding to the elastic pieces  266  in the rotational body  240  so that the elastic pieces  266  can be locked into the respective lock pockets  267  when the sleeve  260  is raised to the highest position. 
     Thus, the sleeve  260  can be moved upward and downward while being brought into close resilient contact with the rotational body  240  by the elastic pieces  266 . Further, when the sleeve  260  is raised to the highest position, the elastic pieces  266  are locked into the respective lock pockets  267  so that the sleeve  260  is fixed to the rotational body  240 . Thus, the sleeve  260  can be fixed to the rotational body  240  in the state where the sleeve  260  has been moved upward. Further, when the cosmetic container is not in use, it becomes possible to stably maintain the state in which the discharge holes  232  are blocked, which is obtained with the upward movement of the sleeve  260 . 
     In addition, a stepped portion  268  may be formed on an inner peripheral surface of the lower end of the sleeve  260 . A flange  269  may be formed to protrude outward from an outer peripheral surface of the upper end of the rotational body  240  which is inserted into the sleeve  260 . Thus, when the sleeve  260  is moved upward, the stepped portion  268  of the sleeve  260  is locked to the flange  269  of the rotational body  240 , which makes it possible to prevent the sleeve  260  from being detached from the rotational body  240 . 
       FIG. 5  illustrates the opening/closing state of the discharge holes with the upward/downward movement of the sleeve. 
     As shown in  FIG. 5 , with the upward/downward movement of the sleeve  260 , the rotational body  240  is rotated clockwise and counterclockwise so that the discharge holes  236  are opened and closed. 
     The sleeve  260  can be moved only upward and downward relative to the housing  230  staying in a fixed state because the protrusions  262  are locked into the vertical grooves  234 . Further, the sleeve  260  is coupled to the rotational body  240  through the cam grooves  250  and the cam protrusions  264 . The rotational body  240  is not moved upward and downward relative to the housing  230  but is rotatably coupled to the housing  230 . Thus, the rotational body  240  can be merely rotated with the upward/downward movement of the sleeve  260 . 
     Thus, when the sleeve  260  is moved upward and downward, the rotational body  240  which is engaged with the cam protrusions  264  of the sleeve  260  through the cam grooves  250  is rotated relative to the housing  230 . As the rotational body  240  rotates relative to the housing  230  staying in a fixed state, the positions of the transfer holes  242  relative to the discharge holes  232  may be changed to open and close the discharge holes  232 . 
     That is, when the sleeve  260  is moved upward relative to the housing  230 , the rotational body  240  is rotated in one direction so that the transfer holes  242  formed in the rotational body  240  are positionally deviated from the discharge holes  232  formed in the housing  230 . Thus, the discharge holes  232  are blocked and the discharge of the powder is stopped. 
     Meanwhile, when the sleeve  260  is moved downward relative to the housing  230 , the rotational body  240  is rotated in a direction opposite the one direction. Thus, the transfer holes  242  formed in the rotational body  240  are moved to the positions of the discharge holes  232  formed in the housing  230 . That is, the rotational body  240  is rotated relative to the housing  230  staying in a fixed state, and the transfer holes  242  are aligned with the discharge holes  232  so that the transfer holes  242  and the discharge holes  232  are brought into communication with each other. Accordingly, the discharge holes  232  are opened so that the powder can be supplied to the powder brush  210  through the discharge holes  232  and the transfer holes  242 . 
     As described above, the opening/closing part  220  of the present embodiment can open and close the discharge holes  232  by moving the sleeve  260  upward and downward to rotate the rotational body  240 . This eliminates the need to perform an additional operation for opening and closing the discharge holes  232 , thus improving the usability of the cosmetic container. 
       FIG. 6  illustrates the configuration of the air injection part according to the present embodiment. 
     As shown in  FIG. 6 , the air injection part  300  is installed in the lower end of the container body  110  to inject air toward the discharge holes  232 , thereby forcibly injecting the powder into the brush part  200 . 
     The air injection part  300  of the present embodiment may include a holder  310  provided in an opened portion of the lower end of the container body  110 , a cover  312  provided in an upper end of the holder  310 , an air tube  314 , through which air is transferred, formed on the cover  312  to extend toward the upper portion of the container body  110 , a button  316  provided in a lower end of the holder  310  to protrude outwardly so that the button  316  can be pressed externally, an elastic member  318  provided between an inner wall  311  of the holder  310  and the button  316  to apply an elastic resilience with respect to the button  316 , and a check valve  320  provided on an upper end of the air tube  314  and configured to inject the air into the discharge holes  232  of the container body  110  by being opened and closed by an air pressure of the air tube  314 , which is generated with the operation of the button  316 . 
     In addition, the air injection part  300  may further include a piston member  317  provided in the button  316  and having a skirt portion whose outer diameter is increased as it goes upward. The piston member  317  is brought into close contact with an inner peripheral surface of the holder  310  in an elastic manner. 
     The holder  310  may be detachably coupled to the lower end of the container body  110 . For example, a male screw and a female thread may be formed in the lower end of the container body  110  and the lower end of the holder  310 , respectively, so that the container body  110  and the holder  310  are threadedly coupled to each other. 
     The cover  312  is coupled to the upper end of the holder  310 . The cover  3   12  can cover the holder  310  to hermetically seal a space inward of the cover  312 . The air tube  314  is integrally formed on the upper end of the cover  312 . The air tube  314  is in communication with an internal space of the holder  310  and extends vertically toward the discharge holes. Thus, when the button  316  is pressed, the air in the space inward of the cover  312  can be injected toward the discharge holes through the air tube  314 . 
     A hole is formed in the lower end of the holder  310 . The holder  310  can be coupled with the button  316  through the hole. The inner wall  311  of a cylindrical shape may be formed inside the holder  310 . The piston member  317  is brought into close contact with the inner wall  311 . The button  316  is installed to protrude outward through the hole of the holder  310  while being fitted to the holder  310 . The piston member  317  is provided inside the button  316  and is moved together with the button  316 . The piston member  317  has the skirt portion whose diameter is gradually increased as it goes upward, so that the piston member  317  is brought into close contact with the inner wall  311  of the holder  310 . The piston member  317  may be formed of an elastic material such as rubber, silicon or the like. 
     Thus, when the button  316  is pressed, the skirt portion of the piston member  317  is brought into close contact with the inner wall  311  of the holder  310  so that the air in the internal space of the holder  310  is pushed out forcibly toward the air tube  314 . 
     The elastic member  318  is inserted into the internal space of the holder  310  so that the button  316  and the cover  312  are coupled to each other in a resilient manner. Thus, when the button  316  is pressed, the elastic member  318  is elastically compressed to apply an elastic resilience with respect to the button  316 . As a result, the button  316  returns to its original state. 
     The check valve  320  is provided at the tip of the air tube  314 . 
     The check valve  320  is a valve  320  configured to convey fluid only in one direction. The check valve  320  can convey the fluid from the air tube  314  toward the discharge holes  232 . However, the conveyance of the fluid in a direction opposite the one direction in the check valve  320  is blocked. Thus, the air is injected toward the discharge holes by the check valve  320 , whereas the powder does not flow into the air tube  314  through the check valve  320 . 
     In the present embodiment, the check valve  320  is formed of an elastic material. The check valve  320  may be configured as follows. A lower end of the check valve  320  is opened to be in communication with the air tube  314 . The check valve  320  is formed in a conical shape having both membranes which are gradually reduced in thickness as they are directed upward. A cut line  322  of a slit shape is formed in an upper end of the check valve  320  as the tip. The both membranes are in contact with each other through the cut line  322 . 
     The check valve  320  may be formed of an elastically deformable material. For example, the check valve  320  may be formed of a material such as rubber, silicon, resin or the like. The check back  320  itself has elasticity. Thus, in a state where the check valve  320  is elastically deformed due to an external pressure, if such an external force is released, the check valve  320  can be returned to the origin state by virtue of its own resilience. 
     The check valve  320  is opened and closed according to a change in internal pressure through the air tube  314  to discharge the air in one direction. That is, when the button  316  is pressed, the internal pressure of the holder  310  is increased and the cut line  322  in the tip of the check valve  320  is expanded and opened. Thus, the air is injected from the air tube  314  toward the discharge holes  232  of the housing  230  through the check valve  320 . 
     Meanwhile, if the external force acting on the button  316  is released, the button  316  returns to the original state and the pressure of the air tube  314  is reduced. As a result, the cut line  322  in the tip of the check valve  320  is contracted and closed. This prevents the powder outside the check valve  320  from flowing into the air tube  314 . 
     As described above, by injecting the air toward the discharge holes  232  with a simplified configuration, it is possible to discharge and use the powder inside the container body  110  to the powder brush  210  through the discharge holes  232  in a smoother manner. 
       FIGS. 8 to 12  illustrate a cosmetic container provided with an air injection part according to another embodiment. 
     Other configurations are the same as those described above except for the structure of the air injection part in the cosmetic container of the above embodiment. Accordingly, in the following description, the same configurations as those of the above embodiment will be designated by like reference numerals with detailed descriptions thereof omitted. 
     The structure of the air injection part will be described below with reference to  FIGS. 8 to 12 . 
     As shown in figures, an air injection part  300  is installed at the lower end of the container body  110  to inject air toward the discharge holes  232 , thereby forcibly injecting the powder into the brush part  200 . 
     The air injection part  300  of this embodiment may include a holder  310 , a button  320 , and a pumping member  330 . 
     The holder  310  is installed at the lower end of the container body  110 . The holder  310  may be detachably coupled to the lower end of the container body  110 . For example, a male screw and a female screw may be formed at the lower end of the container body  110  and the upper end of the holder  310 , respectively, so that the container body  110  and the holder  310  are threadedly coupled with each other. 
     The holder  310  supports the button  320 . A hole  312  is formed in the lower end of the holder  310  so that the holder  310  can be engaged with the button  320 . 
     The button  320  has a configuration in which an upper portion is opened and the pumping member  330  is fitted into an internal space of the button  320 . The button  320  is coupled with the pumping member  330  inside the holder  310 . 
     The button  320  is fitted into the holder  310  such that the button  320  protrudes outward through the hole  312  of the holder  310 . A flange  322  may be formed on an upper portion of the button  320  to protrude outward, so that the flange  322  is locked into the hole  312  and the button  312  is prevented from being separated from the hole  312 . Thus, the button  320  is supported by the holder  310  while protruding through the hole  312  of the holder  310 . The user can push the button  320  protruding outward of the holder  310  to operate the pumping member  330 . 
     The pumping member  330  is coupled with the button  320  inside the holder  310 . The pumping member  330  may be elastically contracted by the button  320  to discharge air in the pumping member  330  through the upper end of the pumping member  330 . 
     The pumping member  330  has an internal space into which air flows. The pumping member  330  is provided between the container body  110  and the button  320  in a resilient manner. The lower end of the pumping member  330  is coupled with the button  320  and the upper end thereof extends toward the discharge holes  232  of the container body  110 . The pumping member  330  may be elastically deformed by a pressing force of the button  320  to inject the inner air into the discharge holes  232  of the container body  110 . 
     The pumping member  330  of this embodiment may include an elastic deformation portion  331 , an upper pad  332 , a lower pad  333 , an insertion portion  340 , an air tube  334 , and a check valve  335 , which are formed as a unit. The pumping member  330  has a hollow cylindrical shape. In the pumping member  330 , the check valve  335 , the air tube  334 , the upper pad  332 , the elastic deformation portion  331 , the lower pad  333 , and the insertion portion  340  are continuously connected in that order from above downward. 
     The pumping member  330  may be formed of, for example, an elastic material, such as rubber, silicon or the like. 
     The pumping member  330  may be formed of a single body obtained by injecting a resin such as rubber, silicon or the like so that the elastic deformation portion  331 , the upper pad  332 , the lower pad  333 , the insertion portion  340 , the air tube  334 , and the check valve  335  are connected to one another as a unit. 
     This makes it possible to reduce the number of components constituting the air injection part  300  as much as possible. 
     The elastic deformation portion  331  is elastically deformed at the time of pushing the button  320  and releasing the pushing operation so that the inner air is pressurized and is discharged through the check valve  335  in the tip of the air injection part  300 . The elastic deformation portion  331  is compressed with the pushing operation of the button  320 , and is elastically returned to its origin state when the external force acting on the button  320  is released. The button  320  that has been pushed by virtue of the elastic force of the elastic deformation portion  331  can be returned to its original state by protruding outward of the holder  310 . 
     That is, the elastic deformation portion  331  performs the operation of discharging the air to the outside and the operation of applying the elastic force for returning the button  320  to the original position by applying a pressure with respect to the interior of the pumping member  330 . 
     As shown in  FIG. 10 , the elastic deformation portion  331  of the present embodiment may be configured to be bent in an outwardly convex shape for smooth deformation. In addition to the above-described configuration, the elastic deformation portion  331  may be configured in a bellows shape having overlapped creases. The elastic deformation portion  331  may have any shape as long as the elastic deformation portion  331  can be compressed in an elastic manner and returned to its original shape. 
     The upper pad  332  and the lower pad  333  are formed on the upper portion and the lower portion of the elastic deformation portion  331 , respectively 
     The upper pad  332  may be integrally formed on the upper portion of the elastic deformation portion  331  to protrude outward so that the upper pad  332  is brought into close contact with an inner flange  338  formed on an inner surface of the container body  110 . 
     The lower pad  333  may be integrally formed on the lower portion of the elastic deformation portion  331  to protrude outward so that the lower pad  333  is brought into close contact with the upper end of the button  320 . 
     The upper pad  332  and the lower pad  333  are brought into close contact with the inner flange  338  of the container body  110  and the button  320  at a predetermined pressure, respectively, by virtue of the elastic force of the elastic deformation portion  331 , in the state in which the holder  310  is fastened to the lower end of the container body  110 . 
     In this embodiment, a distance between the upper pad  332  and the lower pad  333  may be larger than that between the inner flange  338  and the upper end of the button  320  in a state in which the button  320  is not pushed. Thus, when the holder  310  is completely fastened to the lower end of the container body  110 , the upper pad  332  and the lower pad  333  are pressed by the inner flange  338  and the button  320 , respectively. Accordingly, the elastic deformation portion  331  formed between the upper pad  332  and the lower pad  333  is pressed and elastically deformed so that the elastic force is applied to the upper pad  332  and the lower pad  333 . 
     Thus, the upper pad  332  can be brought into close contact with the inner flange  338  at a predetermined pressure. Further, in the state in which the lower pad  333  presses the button  320  at a predetermined pressure, the state in which the button  320  protrudes from the holder  310  can be continuously maintained in a stable manner. 
     As shown in  FIG. 11 , the inner flange  338  is formed in the container body  110  so as to support the upper pad  332 . The inner flange  338  is formed to protrude in a horizontal direction from an inner peripheral surface of the container body  110  toward the center portion thereof. The upper pad  332  is brought into close contact with a lower end of the inner flange  338 . The air tube  334  formed above the upper pad  332  passes through a central hole  339  of the inner flange  338 . 
     The inner flange  338  may act as a stopper configured to block the upper pad  332  and prevent the pumping member  330  from moving upward. Further, the inner flange  338  is brought into close contact with the upper pad  332  so that the powder accommodated in the container body  110  is prevented from being discharged to the outside. 
     As described above, the upper pad  332  remains in close contact with the inner flange  338  at a pressure by virtue of the elastic force of the elastic deformation portion  331 . Thus, it is possible to prevent the powder from being discharged to the outside through the gap between the inner flange  338  of the container body  110  and the upper pad  332  even in a state in which the button  320  is not pushed. 
     In this embodiment, in order to increase airtightness between the inner flange  338  and the pumping member  330 , the pumping member  330  may further include a stepped member  337  spaced apart from the upper pad  332  and formed to protrude outward of the air tube  334 . The stepped member  337  is brought into close contact with an upper end of the inner flange  338 . Thus, the pumping member  330  may be coupled with the inner flange  338  while the inner flange is fitted between the stepped member  337  and the upper pad  332 . 
     By allowing the upper pad  332  to be in close contact with the lower portion of the inner flange  338  and allowing the stepped member  337  to be in close contact with the upper portion of the inner flange  338  with the inner flange  338  interposed between the stepped member  337  and the upper pad  332 , the pumping member  330  and the container body  110  are more tightly coupled with each other so that the powder accommodated in the container body  110  can be more effectively prevented from flowing out through the central hole  339  of the inner flange  338 . 
     In order to ensure more tight coupling between the pumping member  330  and the container body  110 , an outer diameter of the air tube  334  positioned between the stepped member  337  and the upper pad  332  may be set greater than or equal to an inner diameter of the central hole  339  of the inner flange  338 . Further, the gap between the stepped member  337  and the upper pad  332  may be set smaller than or equal to a thickness of the inner flange  338 . Thus, the stepped member  337  and the upper pad  332  of the pumping member  330  can be brought into close contact with the inner flange  338  in a more air-tight manner. 
     An upper end of the stepped member  337  may form an inclined surface whose diameter becomes smaller as it goes upward. This allows the upper inclined surface of the stepped member  337  to easily pass through the central hole  339  of the inner flange  338  in the course of coupling the pumping member  330  to the inner flange  338  of the container body  110 . Thus, the stepped member  337  can be easily assembled to the inner flange  338  while passing through the central hole  339  of the inner flange  338 . 
     The air tube  334  is integrally formed on the upper portion of the elastic deformation portion  331 . The air tube  334  is formed to extend toward the discharge holes along an axial direction. A length of the air tube  334  may be variously changed depending on a length of the container body  110 . The interior of the air tube  334  is in communication with the interior of the elastic deformation portion  331 . The air pushed out by the compression of the elastic deformation portion  331  is transferred along the air tube  334 . The air transferred inward of the air tube  334  is injected toward the discharge holes through the check valve  335  formed at the tip. 
     The check valve  335  is integrally formed on the upper end of the air tube  334 . The check valve  335  is opened and closed by an internal air pressure so that the air can be injected to only the outside from the interior of the air tube  334 . 
     In this embodiment, the check valve  335  may be formed in a tapered conical shape having both membranes which are gradually reduced in thickness upward, and may have a configuration in which a slit-liked cut line  336  is formed in an upper end of the check valve  335  as a tip portion, and the both membranes are in contact with each other through the cut line  336 . 
     The check valve  335  is a valve configured to convey fluid only in one direction. The check valve  335  can convey the fluid from the air tube  334  toward the discharge holes. However, the conveyance of the fluid in a direction opposite the one direction in the check valve  335  is blocked. Thus, the air is injected toward the discharge holes by the check valve  335 , whereas the powder does not flow into the air tube  334  through the check valve  335 . 
     The check valve  335  itself has elasticity. Thus, in a state where the check valve  335  is elastically deformed due to an external pressure, when such an external force is released, the check valve  320  can be returned to the origin state by virtue of its own resilience. 
     The check valve  335  is opened and closed according to a change in internal pressure through the air tube  334  to discharge the air in one direction. 
     That is, when the button  320  is pressed, the internal pressure of the button  320  is increased and the cut line  336  in the tip of the check valve  335  is expanded and opened. Thus, the air is injected from the air tube  334  toward the discharge holes  232  of the housing  230  through the check valve  335 . 
     Meanwhile, if the external force acting on the button  320  is released, the button  320  returns to the original state and the pressure of the air tube  334  is reduced. As a result, the cut line  336  in the tip of the check valve  335  is contracted and closed. This prevents the powder outside the check valve  335  from flowing into the air tube  334 . 
     As described above, by injecting the air toward the discharge holes  232  with a simplified configuration, it is possible to discharge and use the powder inside the container body  110  to the powder brush  210  through the discharge holes  232  in a smoother manner. 
     The insertion portion  340  is integrally formed under the elastic deformation portion  331  to be in communication with the interior of the elastic deformation portion  331 . The insertion portion  340  extends downward from the lower pad  333  and has a cylindrical shape with its lower end opened. The insertion portion  340  is inserted into the button  320  and is brought into close contact with an inner peripheral surface of the button  320  in an elastic manner. 
     The insertion portion  340  may include a fitting portion  341  that is fitted to the button  320 , and a skirt portion  342  formed to extend downward from the fitting portion  341 . The skirt portion  342  may be configured so that diameter becomes larger downward. 
     The skirt portion  342  is brought into close contact with the inner surface of the button  320  to prevent the inner air from escaping through a gap between the insertion portion  340  and the button  320 . Further, the skirt portion  342  is elastically deformed such that an external air flows into the button  320  through a gap between the skirt portion  342  and the button  320 . 
     When the internal pressure of the pumping member  330  is relatively larger than the external pressure, the skirt portion  342  may be brought into close contact with the inner surface of the button  320  in a tighter manner while being expanded outward. 
     Thus, in the course of pushing the button  320  to compress the elastic deformation portion  331  of the pumping member  330 , the skirt portion  342  is brought into close contact with the button  320  so that the air inside the pumping member  330  is hard to escape to the outside through a gap between the button  320  and the skirt portion  342 . 
     Meanwhile, when the internal pressure of the pumping member  330  is relatively smaller than the external pressure, the skirt portion  342  is pulled inward so that the external air can be introduced into the pumping member  330  through the gap between the inner surface of the button  320  and the skirt portion  342 . 
     Thus, the elastic deformation portion  331  is compressed so that the inner air is discharged through the check valve  335 . In this state, when the elastic deformation portion  331  returns to its origin state, the external air flows into the pumping member  330  through the gap between the insertion portion  340  and the button  320  and the interior of the pumping member  330  can be filled with the external air again. 
     In a case the external air does not flow smoothly into the pumping member  330 , the elastic deformation portion  331  does not return to its original state so that the operation of the air injection part  300  may not be smoothly performed. 
     This embodiment provides a configuration in which the external air is introduced into the pumping member  330  in a smoother manner. To this end, the button  320  of this embodiment may include at least one or more trench grooves  324  formed in an upper end of the button  320 , which is in contact with the lower pad  333  of the pumping member  330 . 
     The trench grooves  324  may be formed to be concave in an upper surface of the flange  322  of the button  320 , which is in contact with the lower pad  333 . The trench grooves  324  may act as passages through which air flows through gaps formed between the trench grooves  324  and the lower pad  333 . 
     The trench grooves  324  may be formed at intervals along the flange  322  of the button  320 . The number of the formed trench grooves  324  may be variously changed. 
     Further, the trench grooves  324  may be formed to extend along the inner peripheral surface of the button  320  at the upper portion of the button  320 . Thus, clearances may be formed in the inner peripheral surface of the button  320  between the insertion portion  340  and the button  320 . With this configuration, the external air may be introduced into the pumping member  330  in a smoother manner through the trench grooves  324  between the insertion portion  340  and the button  320 . 
     In this embodiment, the trench grooves  324  may be formed at a position higher than the lower end of the skirt portion  342 . Thus, gaps are not formed between the lower end of the skirt portion  342  and the inner peripheral surface of the button  320  by the trench grooves  324 . Thus, the external air is easily introduced into the pumping member  330  through the trench grooves  324 , whereas the air inside the pumping member  330  is still not discharged to the outside through the gap between the button  320  and the insertion portion  340 . 
     As described above, the air injection part of the present embodiment is provided with the pumping member  330  that constitutes a single member. This makes it possible to perform an air injection operation in a more effective manner with an extremely simplified configuration. 
       FIG. 12  illustrates an operation state of the air injection part according to the present embodiment. 
     As shown in  FIG. 12 , when the button  320  is pushed, the lower pad  333  is pressed and raised, and the elastic deformation portion  331  of the pumping member  330  is elastically compressed. As a result, the internal air pressure of pumping member  330  is increased and the skirt portion  342  is expanded outward to be brought into close contact with the inner surface of the push button  320 . 
     Since the skirt portion  342  is brought into close contact with the button  320 , the air inside the pumping member  320  does not escape to the outside through the trench grooves  324  formed in the button  320 . 
     The cut line  336  of the check valve  335  is expanded as the internal pressure of the pumping member  330  increases. Thus, the inner air of the pumping member  330  can be injected to the outside through the cut line  336 . 
     The inner air of the pumping member  330  is injected toward the discharge holes  232  through the cut line  336 , whereby the powder accommodated in the container body  110  can be easily discharged through the discharge holes  232  together with the air. 
     As described above, in the course of compressing the pumping member  330  to inject the air, the button  320  and the insertion portion  340  can remain in tight close contact with each other, and the air can be injected only through the cut line  336  of the check valve  335 . 
     Meanwhile, when the external force acting on the button  320  is released, the elastic deformation portion  331  that remains compressed is returned to its original state by virtue of the elastic resilience. The button  330  also protrudes outward of the holder  310  by the elastic force of the elastic deformation portion  331 . 
     The internal pressure of the elastic member  330  is reduced as the elastic deformation portion  331  is returned to its original state. As a result, the cut line  336  of the check valve  335  is contracted and closed. This prevents the powder accommodated in the container body  110  from flowing into the pumping member  330  through the cut line  336 . 
     Subsequently, the internal pressure of the pumping member  330  becomes lower than an external pressure. As a result, the external air is introduced into the pumping member  330  through the trench groove  324  due to such an air pressure difference. 
     Due to the air pressure difference, gap is generated between the skirt portion  342  and the inner surface of the button  320 . The external air can be smoothly introduced into the pumping member  330  through the gap. 
     The elastic deformation portion  331  of the pumping member  330  is elastically expanded in this manner so that the button  320  is returned to its original position and a new air is caused to be introduced into the pumping member  330 , thereby preparing a subsequent pumping operation. 
     While exemplary embodiments of the present disclosure have been illustrated and described as described above, various modifications and other embodiments may be made by those skilled in the art. Such modifications and other embodiments are all contemplated and included in the appended claims without departing from the spirit and scope of the present disclosure. 
     EXPLANATION OF REFERENCE NUMERALS 
       
     
       
         
           
               
               
               
             
               
                   
                   
               
             
            
               
                   
                 100: cosmetic container 
                 110, 120: container body 
               
               
                   
                 200: brush part 
                 210: powder brush 
               
               
                   
                 220: opening/closing part 
                 230: housing 
               
               
                   
                 232: discharge hole 
                 234: vertical groove 
               
               
                   
                 236: insertion hole 
                 237: groove portion 
               
               
                   
                 240: rotational body 
                 242: transfer hole 
               
               
                   
                 244: transfer tube 
                 246: passage 
               
               
                   
                 247: rotational shaft 
                 248: recessed portion 
               
               
                   
                 250: cam groove 
                 252: inclined portion 
               
               
                   
                 254: linear portion 
                 260: sleeve 
               
               
                   
                 262: protrusion 
                 264: cam protrusion 
               
               
                   
                 268: stepped portion 
                 269: flange 
               
               
                   
                 270: filter 
                 272: fitting bar 
               
               
                   
                 274: conical protrusion 
                 276: stopper 
               
               
                   
                 280: sealing pad 
                 282: hole 
               
               
                   
                 284: guide bar 
                 286: flesh portion 
               
               
                   
                 300: air injection part 
                 310: holder 
               
               
                   
                 312: cover 
                 314: air tube 
               
               
                   
                 316: button 
                 318: elastic member 
               
               
                   
                 320: check valve 
                 322: cut line 
               
               
                   
                 320: button 
                 322: flange 
               
               
                   
                 324: trench groove 
                 330: pumping member 
               
               
                   
                 331: elastic deformation portion 
                 332: upper pad 
               
               
                   
                 333: lower pad 
                 334: air tube 
               
               
                   
                 335: check valve 
                 336: cut line 
               
               
                   
                 337: stepped portion 
                 338: inner flange 
               
               
                   
                 340: insertion portion 
                 341: fitting portion 
               
               
                   
                 342: skirt portion