Patent Publication Number: US-10779696-B2

Title: Cleaner and dust separating device applying the same

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application is a continuation of application Ser. No. 15/502,465, which is the National Stage of International Application No. PCT/KR2015/007983 filed Jul. 30, 2015, which claim foreign priority to Korean Patent Application No. 10-2014-0101679 filed Aug. 7, 2014 and Korean Patent Application No. 10-2015-0007504 filed Jan. 15, 2015, this disclosures of which are herein incorporated by reference in their entirety. 
    
    
     BACKGROUND 
     1. Field 
     The present invention relates to a cleaner having an improved structure capable of preventing a leakage of dust and a breakdown in a dust collecting device which is opened and closed to separate the dust, and a dust collecting device applied to the same. 
     2. Description of Related Art 
     Generally, a cleaner is an apparatus in which air containing dirt on a surface to be cleaned is sucked, and the dirt is separated and collected from the air, and the cleaned air is discharged to an outside of a main body. 
     The cleaner is classified into a canister type in which a main body and a suction nozzle are separated and then connected with each other through a predetermined tube, and an up-right type in which the main body and the suction nozzle are formed as one body according to a type thereof. 
     The cleaner includes a driving unit which generates a suction force, a suction unit which sucks air on a surface to be cleaned using a suction force of the driving unit, and a dust collecting device which separates and collects dust from the air sucked by the suction unit and discharges the cleaned air. 
     Among dust collecting devices, a cyclone dust collecting device is a device which separates the dust in the sucked air using a centrifugal force. The cyclone dust collecting device may be semi-permanently used, and is sanitary and convenient, compared with a dust bag type dust collecting device, and thus used widely. 
     The cyclone dust collecting device may be used in various types such as the canister type, the up-right type, and a handy type, regardless of a shape or a kind of the cleaner. 
     The cyclone dust collecting device may include at least one cyclone. The at least one cyclone separates the dust from the air introduced into the cyclone dust collecting device using the centrifugal force. The cyclone generates a rotating air current therein, separates the dust from the air, moves the air from which the dust is separated to an outlet or another cyclone, and then secondarily separates the dust. 
     The cyclone dust collecting device is formed so that one side thereof is opened and closed to discharge the separated dust to an outside. At this time, an area to be opened and closed is sealed to maintain the suction force in the dust collecting device and also to prevent the dust from leaking to an outside. When a sealing member applied to the cyclone dust collecting device has an excellent sealing effect, the suction force in the dust collecting device is maintained and a leakage of the dust is reduced, but it is difficult to open and close the dust collecting device. On the other hand, when the sealing member is provided to easily open and close the dust collecting device, the dust may leak due to an external shock or the like. 
     SUMMARY 
     The present invention is directed to providing a cleaner having an improved structure capable of being sealed to prevent internal dust from leaking from a dust collecting device which is opened and closed, and a dust collecting device applied to the same. 
     Also, the present invention is directed to providing a cleaner having an improved structure capable of maintaining a sealing state in a dust collecting device even though an external shock is exerted, and a dust collecting device applied to the same. 
     Also, the present invention is directed to providing a cleaner having an improved structure capable of maintaining an excellent sealing state in a dust collecting device even though an external shock is exerted, and also being easily opened and closed, and a dust collecting device applied to the same. 
     One aspect of the present invention provides a cleaner including a dust collecting device for separating dust from air, wherein the dust collecting device includes a dust collecting case having a dust discharging port opened to discharge the collected dust; a discharge cover coupled to one side of the dust collecting case to open and close the dust discharge port; and a sealing member provided to extend from an inner surface of the dust collecting case to a coupling surface of the dust collecting case while being in contact with the dust collecting case and thus to be sealed when the dust discharging port is closed. 
     The sealing member may include a sealing portion provided to be in surface contact with the inner surface and the coupling surface; and a connection portion connected to the sealing portion and to vary a position of the sealing portion. 
     The sealing portion may include a first sealing portion configured to extend from the connection portion and provided to be in contact with an inner surface of the dust discharging port and thus to be sealed; and a second sealing portion configured to extend from one side of the first sealing portion and provided to be in contact with the coupling surface and thus to be sealed. 
     The first sealing portion is formed to have a first angle with respect to the second sealing portion, and the first angle may be smaller than 90°. 
     The sealing portion may further include a third sealing portion configured to extend from one side of the connection portion and provided to be in contact with the discharge cover at a lower portion of the first sealing portion and thus to be sealed. 
     The sealing member may further include a coupling portion configured to extend from one side of the connection portion and provided to be coupled to an inside of the discharge cover. 
     The coupling portion may be provided so that the sealing member is coupled to and separated from the discharge cover. 
     The sealing member may be formed of a material having a restoring force. 
     The sealing member may be configured so that the second sealing portion is located between the dust collecting case and the discharge cover while the dust collecting case and the discharge cover are coupled to each other, and at least a part of the second sealing portion is located at an outside of the discharge cover while the dust collecting case and the discharge cover are separated from each other. 
     Another aspect of the present invention provides a dust collecting device applied to a cleaner, the device includes a dust collecting case having a dust discharging port opened to discharge dust collected therein; a discharge cover coupled to one side of the dust collecting case to open and close the dust discharge port; and a sealing member installed along a surface in which the dust collecting case faces the discharge cover, wherein the sealing member extends from an inner surface of the dust collecting case to a coupling surface of the dust collecting case while being in contact with the dust collecting case, and seals the dust collecting case and the discharge cover. 
     The sealing member may include a sealing portion provided to be in surface contact with the inner surface of the dust discharging port and the coupling surface of the dust collecting case; and a connection portion which is connected so that the sealing portion is able to be moved to a first position and a second position. 
     In the sealing member, the sealing portion may be located at the first position while the dust collecting case and the discharge cover are separated from each other, and the sealing portion may be located at the second position to seal the dust collecting case and the discharge cover while dust collecting case and the discharge cover are coupled to each other. 
     The sealing portion may include a first sealing portion configured to extend from the connection portion and provided to be in contact with an inner surface of the dust discharging port and thus to be sealed; and a second sealing portion configured to extend from one side of the first sealing portion and provided to be in contact with the coupling surface and thus to be sealed. 
     The first sealing portion may be formed to have a first angle with respect to the second sealing portion, and the first angle may be smaller than 90°. 
     The sealing member may further include a coupling portion configured to extend from one side of the connection portion and provided to be coupled to an inside of the discharge cover. 
     The sealing portion may further include a third sealing portion configured to extend from one side of the connection portion and provided to be in contact with the discharge cover at a lower portion of the first sealing portion and thus to be sealed. 
     The sealing member may have a restoring force. 
     The sealing member may be configured to be in surface contact with the inner surface and the coupling surface while a shape thereof is deformed due to coupling between the dust collecting case and the discharge cover. 
     Still another aspect of the present invention provides a cleaner including a dust collecting device for separating dust from air, wherein the dust collecting device includes a dust collecting case having a dust discharging port opened to discharge the collected dust; a discharge cover coupled to one side of the dust collecting case to open and close the dust discharge port; and a sealing member configured to be in surface contact from a coupling surface of the dust collecting case to an inner surface of the dust collecting case and to seal the dust collecting case and the discharge cover, and the sealing member has a restoring force, and when the dust discharge port is switched from an opened state to a closed state, a shape of the sealing member is deformed to seal the dust collecting case and the discharge cover. 
     According to one embodiment of the present invention, the dust collecting device has the improved structure, and thus the sealing state can be maintained even when the external shock is exerted. 
     According to one embodiment of the present invention, the dust collecting device can be easily opened and closed, and can have an improved sealing effect. 
     According to one embodiment of the present invention, the enhanced sealing effect can be provided by increasing a contact area between the sealing member and the dust collecting device. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a view illustrating a cleaner according to one embodiment. 
         FIG. 2  is a view illustrating a state in which a dust collecting device is separated from a main body of the cleaner according to one embodiment. 
         FIG. 3  is an exploded perspective view illustrating the dust collecting device of the cleaner according to one embodiment. 
         FIG. 4  is a cross-sectional view illustrating a cross section of the dust collecting device of the cleaner according to one embodiment. 
         FIG. 5  is a view illustrating a state in which a discharge cover is opened in the dust collecting device of the cleaner according to one embodiment. 
         FIG. 6  is an exploded perspective view illustrating the discharge cover and a sealing member in the dust collecting device of the cleaner according to one embodiment. 
         FIG. 7  is a view enlargedly illustrating a cross section of the sealing member of  FIG. 6 . 
         FIG. 8  is a view illustrating a state in which the sealing member of  FIG. 6  is located at a first position. 
         FIG. 9  is a view illustrating a state in which the sealing member of  FIG. 6  is located at a second position. 
         FIG. 10  is a view illustrating a process in which the sealing member seals the discharge cover and a dust collecting case in the dust collecting device according to one embodiment of the present invention. 
         FIGS. 11 and 12  are views illustrating a first modified example of the sealing member of  FIG. 7 . 
         FIGS. 13 and 14  are views illustrating a second modified example of the sealing member of  FIG. 7 . 
         FIGS. 15 and 16  are views illustrating a third modified example of the sealing member of  FIG. 7 . 
         FIGS. 17 and 18  are views illustrating a fourth modified example of the sealing member of  FIG. 7 . 
         FIGS. 19 and 20  are views illustrating a fifth modified example of the sealing member of  FIG. 7 . 
         FIGS. 21 and 22  are views illustrating a sixth modified example of the sealing member of  FIG. 7 . 
         FIGS. 23 and 24  are views illustrating a seventh modified example of the sealing member of  FIG. 7 . 
         FIG. 25  is an exploded perspective view illustrating the dust collecting device including a dust catching member according to another embodiment of the present invention. 
         FIG. 26  is a cross-sectional view illustrating a cross section of the dust collecting device of  FIG. 25 . 
         FIG. 27  is a cross-sectional view illustrating a discharge cover including the dust catching member of  FIG. 25 . 
         FIG. 28  is a view illustrating the discharge cover including a first modified example of the dust catching member of  FIG. 25 . 
         FIG. 29  is a perspective view illustrating a dust collecting device including a second modified example of the dust catching member of  FIG. 25 . 
         FIG. 30  is a view illustrating a cross section of the dust collecting device of  FIG. 29 . 
         FIG. 31  is a perspective view illustrating a grill unit of  FIG. 3 . 
         FIG. 32  is a perspective view illustrating a cyclone body of  FIG. 3 . 
         FIG. 33  is a cut-away perspective view illustrating a coupling structure of the grill unit and the cyclone body of  FIG. 3 . 
         FIG. 34  is a view of the dust collecting device taken along a line A-A′ of  FIG. 4 . 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Meanwhile, the terms such as “front end”, “rear end”, “upper”, “lower”, “upper end” and “lower end” used in the specification are defined based on the drawings, and a shape and a location of each element should not be limited by the terms. 
       FIG. 1  is a view illustrating a cleaner according to one embodiment, and  FIG. 2  is a view illustrating a state in which a cyclone dust collecting device is separated from a main body of the cleaner according to one embodiment. Hereinafter, a dust collecting device  100  may be used as a meaning including the cyclone dust collecting device. Hereinafter, dirt may be used as a meaning embracing various foreign substances including dust. 
     As illustrated in  FIGS. 1 and 2 , the cleaner  1  may include a main body  10 , the dust collecting device  100 , a suction part  21 , and a wheel assembly  50 . The dust collecting device  100  and the wheel assembly  50  may be installed at the main body  10 . In particular, the dust collecting device  100  may be removably installed at the main body  10 . The suction part  21  may be in contact with a surface to be cleaned, and may suck foreign substances on the surface to be cleaned. 
     The main body  10  may include a fan motor (not shown) which generates a suction force. The suction part  21  may suck air on the surface to be cleaned and dust contained in the air by the suction force generated in the main body  10 . The suction part  21  may be provided in a wide shape to be in close contact with the surface to be cleaned. 
     An extension tube  20 , a handle tube  30 , and a flexible hose  23  may be provided between the main body  10  and the suction part  21 . The extension tube  20  may be formed of a resin material or a metallic material, and may connect the suction part  21  with the handle tube  30 . 
     The handle tube  30  is provided to connect the extension tube  20  with the flexible hose  23 . A handle part  31  and an operation part  32  may be provided at the handle tube  30 . A user may grasp the handle part  31  and then may perform a cleaning operation. Also, the user may operate a button or the like provided at the operation part  32 , and may operate a function of the cleaner, for example to turn on/off the cleaner  1  or adjust a suction intensity. 
     The flexible hose  23  connects the handle tube  30  with the main body  10 . The flexible hose may be provided to have a flexible material, such that the handle tube  30  is freely moved. 
     All of the suction part  21 , the extension tube  20 , the handle tube  30  and the flexible hose  23  may be provided to be in communication with each other. The air sucked by the suction part  21  may pass in turn through the extension tube  20 , the handle tube  30 , and the flexible hose  23 , and then may be introduced into the main body  10 . 
     The main body  10  may have a first body port  10   a  which guides the sucked air to the dust collecting device  100 , and a second body port  10   b  through which the air cleaned in the dust collecting device  100  is discharged. The second body port  10   b  may be in communication with a suction chamber (not shown) at which the fan motor (not shown) is provided. 
     The main body  10  may have an installation part  11  at which the dust collecting device  100  is installed. The dust collecting device  100  may be removably installed at the installation part  11 . The dust collecting device  100  may allow the air cleaned by separating and collecting the dust from the air sucked through the suction part  21  to flow to the fan motor (not shown) through the second body port  10   b.    
     The dust collecting device  100  separates the dust from the air using centrifugation. That is, the dust collecting device  100  generates a rotating air current and separates the dust from the air using a centrifugal force. When a predetermined amount of the dust is collected in the dust collecting device  100 , the user may separate the dust collecting device  100  from the main body  10 , and then may throw away the dust collected in the dust collecting device  100 . 
       FIG. 3  is an exploded perspective view illustrating the dust collecting device of the cleaner according to one embodiment,  FIG. 4  is a cross-sectional view illustrating a cross section of the dust collecting device of the cleaner according to one embodiment,  FIG. 5  is a view illustrating a state in which a discharge cover is opened in the dust collecting device of the cleaner according to one embodiment, and  FIG. 6  is an exploded perspective view illustrating the discharge cover and a sealing member in the dust collecting device of the cleaner according to one embodiment. 
     As illustrated in  FIGS. 3 to 6 , the dust collecting device  100  according to one embodiment of the present invention may include a dust collecting case  110 , a discharge cover  220 , and a sealing member  230 . 
     The dust collecting case  110  is coupled to the main body  10 , and serves to collect dirt such as the dust in the air. The dust collecting case  110  may be provided to be coupled to the main body  10 , to filter the dirt from the sucked air, and to discharge the air from which the dirt is filtered. 
     The dust collecting case  110  may include a suction port  220   a  and a discharge port  122 . The air sucked through the suction part  21  is introduced into the dust collecting case  110  through the suction port  220   a , and is separated from the dust in the dust collecting case  110 . The air from which the dust is separated is discharged to the main body  10  through the discharge port  122 . Specifically, the air discharged from the dust collecting case  110  through the discharge port  122  flows to the suction chamber (not shown) through the second body port  10   b.    
     The dust collecting case  110  may include an inlet  111  through which the air is introduced, and an outlet  112  through which the air is discharged. In other words, the dust collecting case  110  may include the inlet  111  through which the air containing the dirt, i.e., the contaminated air is introduced, and the outlet  112  through which the air from which the dirt is removed, i.e., the cleaned air is discharged. The inlet  111  may be provided at the suction port  220   a , and the outlet  112  may be provided at the discharge port  122 . 
     The dust collecting case  110  may form an exterior of the dust collecting device  100 . A part of the dust collecting case  110  may be formed of a transparent material to allow an internal space to be seen. The dust collecting case  110  may have a cylindrical shape, but the present invention is not limited thereto. 
     The dust collecting case  110  may include an upper case  120 , a middle case  130 , and a dust collecting container  200 . 
     The middle case  130  may be formed in an approximately cylindrical shape of which upper and lower surfaces are opened. A filter member  134  may be provided at an upper portion of the middle case  130  to remove the dirt remaining in the air passing through cyclone chambers  142  and  144 . The filter member  134  may be provided at an upper opening  132  formed at the upper portion of the middle case  130 . That is, the filter member  134  may be provided at the upper opening  132  of the middle case  130  to remove the dirt remaining in the air passing through the first and second cyclone chambers  142  and  144 . 
     The upper case  120  may be provided on the middle case  130 . The upper case  120  may be hinge-coupled to a hinge portion  136  provided at the middle case  130 , and thus may be pivotably provided. The discharge port  122  through which the air cleaned while passing through the cyclone chambers  142  and  144  and the filter member  134  is discharged may be provided at the upper case  120 . The discharge port  122  may be in communication with the suction chamber (not shown) located in the main body  10  at which the fan motor (not shown) is provided. 
     The dust collecting container  200  may be disposed to accommodate the dust separated from the air and to be in communication with at least one cyclone  300 . Also, the dust collecting container  200  may be provided under the middle case  130  to collect the dirt contained in the air. 
     The dust collecting container  200  may include a container body  201 , and a dust collecting chamber  205  which is provided in the container body  201  to accommodate the dirt. 
     The dust collecting chamber  205  may include a first dust collecting chamber  205   a  and a second dust collecting chamber  205   b . The first dust collecting chamber  205   a  may be provided to correspond to the first cyclone chamber  142 , and the second dust collecting chamber  205   b  may be provided to correspond to the second cyclone chamber  144 . That is, the dust discharged from the first cyclone chamber  142  may be collected in the first dust collecting chamber  205   a , and the dust discharged from the second cyclone chamber  144  may be collected in the second dust collecting chamber  205   b . Since the second cyclone chamber  144  is disposed along a circumference of the first cyclone chamber  142  in a circumferential direction, the second dust collecting chamber  205   b  may be provided to correspond to the second cyclone chamber  144  in the circumferential direction with respect to the first dust collecting chamber  205   a . That is, the second dust collecting chamber  205   b  may be provided in an annular shape, and at least a part of the second dust collecting chamber  205   b  may be formed at an upper portion of the first dust collecting chamber  205   a  along a circumference thereof. 
     The second dust collecting chamber  205   b  may include a discharge chamber  205   c . The discharge chamber  205   c  may be provided to collect the dirt accumulated in the second dust collecting chamber  205   b . The discharge chamber  205   c  may be provided at a deep section of the second dust collecting chamber  205   b.    
     The dust collecting chamber  205  may have a dust discharging port  205   d  which is opened at one side thereof to discharge the collected dirt or the like to an outside. The dust discharging port  205   d  may be provided to be opened and closed by the discharge cover  220 . 
     The container body  201  may include a container outer wall  202  and a container inner wall  203 . The container outer wall  202  may be provided to have a cylindrical shape of which upper and lower portions are opened, and the container inner wall  203  may have a flange shape which extends inward to have an annular space at an inner upper portion of the container outer wall  202 . The first dust collecting chamber  205   a  may be provided to be surrounded by an inside of the container outer wall  202 , an inside of the container inner wall  203 , and the discharge cover  220 . The second dust collecting chamber  205   b  may be provided to be surrounded by the inside of the container outer wall  202 , an outside of the container inner wall  203 , and the discharge cover  220 . 
     At least a part of the dust collecting container  200  may be formed of a transparent material to allow the dust collecting chamber  205  to be seen from an outside. 
     The discharge cover  220  may be coupled to one side of the dust collecting case  110  to open and close the dust discharging port  205   d . The discharge cover  220  may be hinge-coupled to one side of the dust collecting case  110 . The discharge cover  220  may be pivoted about a hinge  227 , and may open and close the dust discharging port  205   d.    
     The discharge cover  220  may further include a fixing member  229  which fixes the discharge cover  220  in a state coupled with the dust collecting case  110 . The fixing member  229  may include a first fixing member  229   a  which is provided at one side of the discharge cover  220 , and a second fixing member  229   b  which is installed at a position of the dust collecting container  200  corresponding to the first fixing member  229   a . The first fixing member  229   a  and the second fixing member  229   b  may be provided to be coupled to each other, such that the discharge cover is fixed and coupled to the dust collecting container  200 . 
     The suction port  220   a  may be provided at the discharge cover  220 . The suction port  220   a  may be provided so that the air introduced from the flexible hose  23  is introduced into the dust collecting device  100 . The suction port  220   a  may be provided to be in communication with an inlet tube  173 . The suction port  220   a  may be provided at the discharge cover  220  so that the air sucked from the suction part  21  is not introduced by detouring through a side surface of the dust collecting case  110 , but introduced through a lower portion of the dust collecting case  110 . The inlet  111  may be provided at the suction port  220   a . The inlet  111  may be disposed at a center of the suction port  220   a , but the present invention is not limited thereto. 
     Hereinafter, the sealing member  230  according to one embodiment of the present invention will be described. The sealing member  230  seals the discharge cover  220  and the dust collecting case  110 , and thus may prevent the dust in the dust collecting device  100  from leaking to the outside, and also may constantly maintain an internal pressure of the dust collecting device  100 . 
       FIG. 7  is a view enlargedly illustrating a cross section of the sealing member of  FIG. 6 ,  FIG. 8  is a view illustrating a state in which the sealing member of  FIG. 6  is located at a first position, and  FIG. 9  is a view illustrating a state in which the sealing member of  FIG. 6  is located at a second position. 
     Referring to  FIGS. 7 to 9 , the sealing member  230  may include a sealing portion  231  and a connection portion  235 . When the dust discharging port  205   d  is closed, the sealing member  230  may be provided to extend to a coupling surface  201   b  while being in contact with an inner surface  201   a  of the dust collecting case  110 , and thus to provide a sealing effect. The sealing member  230  may be installed along a surface in which the dust collecting case  110  faces the discharge cover  220 . 
     The sealing portion  231  may be provided to be in contact with each of the discharge cover  220  and the container body  201  of the dust collecting case  110 , and thus to provide the sealing effect. Hereinafter, the dust collecting case  110  which is in contact with the sealing portion  231  may be used as a meaning including the container body  201  in contact with the sealing portion  231 . 
     The sealing portion  231  may include a first sealing portion  232  and a second sealing portion  233 . 
     The first sealing portion  232  may be provided to extend from a connection portion  235 . The first sealing portion  232  may be provided to be in contact with the inner surface  201   a  of the dust collecting case facing the dust discharging port  205   d , and thus to provide the sealing effect. The first sealing portion  232  may be provided so that a position thereof is varied when the dust discharging port  205   d  is opened and closed by the discharge cover  220 . 
     The second sealing portion  233  may be provided to extend from the first sealing portion  232 . The second sealing portion  233  may be formed to have a first angle α with respect to the second sealing portion  233 . According to an example, the first angle α may be smaller than 90°. Since the sealing portion  231  is formed of a material having elasticity, when the first angle α is 90° or more, a restoring force may be generated at the first and second sealing portions  232  and  233 . Therefore, the dust collecting case  110  may be effectively sealed between the first and second sealing portions  232  and  233 . On the other hand, the first angle α is greater than 90°, such that the dust collecting case  110  is easily in contact with the first and second sealing portions  232  and  233 . 
     The second sealing portion  233  may be provided to be in contact with the coupling surface  201   b  of the dust collecting case facing the discharge cover  220  and thus to provide the sealing effect. The second sealing portion  233  may be provided together with the first sealing portion  232  so that a position thereof is varied when the dust discharging port  205   d  is opened and closed by the discharge cover  220 . 
     The sealing portion  231  may further include a third sealing portion  234 . The third sealing portion  234  may be formed by extending from one side of the connection portion  235 . The third sealing portion  234  may be located to be spaced from the first and second sealing portions  232  and  233 . The third sealing portion  234  may be provided so that one side surface thereof is in contact with a coupling surface  227  of the discharge cover  220  facing the coupling surface  201   b  of the dust collecting case, and thus may provide the sealing effect. 
     The connection portion  235  may be provided to be connected to one side of the sealing portion  232 . The connection portion  235  may be provided so that a position thereof is varied. Therefore, the connection portion  235  may vary a position of the sealing portion  232 . 
     The connection portion  235  may include a material having the elasticity. Therefore, when an external force is applied, the position of the connection portion  235  may be moved, and when the external force is removed, the connection portion  235  may be returned to its original position. The entire sealing member  230  including the connection portion  235  may be formed of the material having the elasticity. 
     The connection portion  235  may be provided to have a shape which is rounded to an inside of the dust collecting device. Therefore, the connection portion  235  may easily move the positions of the first and second sealing portions  232  and  233 . 
     A coupling portion  236  may be provided to extend from one side of the connection portion  235 . The coupling portion  236  may be provided to be coupled to one side of the discharge cover  220 . The coupling portion  236  may be coupled into a fixing groove  225  provided at the discharge cover  220 . The fixing groove  225  may be provided at an inner edge area of the discharge cover  220 . The fixing groove  225  may be provided at a position which is spaced inward from the coupling surface  227  of the discharge cover  220 . The fixing groove  225  may be provided so that the coupling portion  236  is inserted into a space  225   c  between protruding portions  225   a  and  225   b  which protrude upward to have a predetermined distance at an inside of the discharge cover  220 . Therefore, the coupling portion  236  may fix the sealing member  230  to the discharge cover  220 . 
     The coupling portion  236  may be provided to be coupled to and separated from the discharge cover  220 . Therefore, the sealing member  230  may be provided to be coupled to and separated from the discharge cover  220 . 
     As illustrated in  FIGS. 8 and 9 , the sealing member  230  may be provided to be movable to first and second positions. As illustrated in  FIG. 8 , when the discharge cover  220  is separated from the dust collecting case  110 , the sealing member  230  may be provided at the first position. The first position may be defined as a position in a state in which the external force is not applied. The sealing member  230  may be provided so that at least a part thereof is located at an outside of the discharge cover  220  at the first position. The sealing member  230  may be provided so that a part of the first sealing portion  232  or the second sealing portion  233  is located at the outside of the discharge cover  220  at the first position. The first and second sealing portions  232  and  233  may be located to be spaced a predetermined distance from the third sealing portion  234 . 
     As illustrated in  FIG. 9 , when the discharge cover  220  is coupled to the dust collecting case  110 , the sealing member  230  may be provided at the second position. The second position may be defined as a position at which the sealing member  230  is in contact with the dust collecting case  110  and provides the sealing effect. The sealing member  230  at the second position may be located to be further moved to the inside of the discharge cover  220  than at the first position. 
     The sealing member  230  at the second position may be located so that the first and second sealing portions  232  and  233  are in contact with the inner surface  201   a  of the dust collecting case and the coupling surface  201   b  of the dust collecting case, respectively. The sealing member  230  has the elasticity at the second position, and thus may have a restoring force intended to be returned to the first position. Therefore, the sealing member  230  may enhance the inner surface  201   a  of the dust collecting case and the coupling surface  201   b  of the dust collecting case due to the restoring force generated at the second position. The sealing member  230  may be provided so that the second sealing portion  233  is in contact with the third sealing portion  234  at the second position. 
     The third sealing portion  234  may be provided at a fixed position. The third sealing portion  234  may be located to be in contact with the coupling surface  227  of the discharge cover  220 , and may seal the discharge cover  220 . The third sealing portion  234  may be located to be spaced from the second sealing portion  233 , when the sealing member  230  is located at the first position, and may also be located to be in contact with the second sealing portion  233 , when the sealing member  230  is located at the second position. 
     As described above, a shape of the sealing member  230  may be configured to be in surface contact with the inner surface  201   a  and the coupling surface  201   b , while a shape thereof is deformed by coupling of the dust collecting case  110  and the discharge cover  220 . When the dust discharging port  205   d  is switched from an opened state to a closed state, the sealing member  230  is deformed and thus may seal the dust collecting case  110  and the discharge cover  220 . 
     Hereinafter, a process in which the sealing member according to one embodiment of the present invention seals the discharge cover and the dust collecting case will be described. 
       FIG. 10  is a view illustrating the process in which the sealing member seals the discharge cover and the dust collecting case in the dust collecting device according to one embodiment of the present invention. 
     Referring to  FIG. 10 ,  FIG. 10A  is a view illustrating a state in which the sealing member is provided at the first position,  FIG. 10B  is a view illustrating a state in which the sealing member is moved and a position thereof is moved while being in contact with the dust collecting case, and  FIG. 10C  is a view illustrating a state in which the discharge cover is coupled to the dust collecting case and the sealing member is provided at the second position. 
     As illustrated in  FIG. 10A , when the user moves the discharge cover  220  to close the opened dust discharging port  205   d , the sealing member  230  may be moved toward the dust collecting case  110  together with the discharge cover  220 . At this time, the first sealing portion  232  and the second sealing portion  233  may be located to be spaced from the third sealing portion  234 . 
     When the sealing member  230  is moved to a position adjacent to the dust collecting case  110 , the sealing member  230  may be located at a position in which at least a part of the first sealing portion  232  or the second sealing portion  233  faces the coupling surface  201   b  of the dust collecting case  110 . 
     As illustrated in  FIG. 10B , the sealing member  230  may be moved together with the discharge cover  220  until being in contact with a part of the dust collecting case  110 . The sealing member  230  may be moved until the coupling surface  201   b  of the dust collecting case  110  is in contact with at least a part of the first sealing portion  232  or the second sealing portion  233 . In this state, as the discharge cover  220  is closer to the dust collecting case  110 , the first sealing portion  232  becomes closer to the third sealing portion  234 , and the second sealing portion  233  may be moved together with the connection portion  235  toward the inside of the discharge cover  220 . 
     As illustrated in  FIG. 10C , when the discharge cover  220  blocks the dust discharging port  205   d  and is coupled to the dust collecting case  110 , the sealing member  230  may be provided to seal each of the discharge cover  220  and the dust collecting case  110 . At this time, the sealing member  230  may be moved to the second position while being in contact with the dust collecting case  110 . At the second position, the sealing member  230  may perform a sealing operation in a state in which the first sealing portion  232 , the second sealing portion  233 , and the third sealing portion  234  are in contact with the inner surface  201   a  of the dust collecting case, the coupling surface  201   b  of the dust collecting case, and the coupling surface  227  of the discharge cover  220 , respectively. 
     As described above, the sealing member  230  according to one embodiment of the present invention performs the sealing operation in a state in which the first sealing portion  232  and the second sealing portion  233  are in surface contact from the inner surface  201   a  of the dust collecting case to the coupling surface  201   b , and thus a contact surface area between the sealing member  230  and the dust collecting case  110  may be increased. Since the surface area between the sealing member  230  and the dust collecting case  110  is increased, the sealing effect may be enhanced. Therefore, it may be prevented that the sealing state is damaged by the external shock, and thus the dust in the dust collecting device  100  leaks. 
     Also, since the sealing member  230  has the restoring force intended to be returned from the second position to the first position, the discharge cover  220  may be easily separated from the dust collecting case  110 . 
     Hereinafter, modified examples of the sealing member  230  will be described. 
       FIGS. 11 and 12  are views illustrating a first modified example of the sealing member of  FIG. 7 . 
     Referring to  FIGS. 11 to 12 , a sealing member  240  may include a sealing portion  241 , a connection portion  246 , and a coupling portion  247 . When comparing with the sealing member  230  of  FIG. 7 , the sealing member  240  is different from the sealing member  230  in a structure of the sealing portion  241 , and other structures thereof are the same as those of the sealing member  230  of  FIG. 7 . Hereinafter, the sealing member  240  will be described centering on a difference from the sealing member  230  of  FIG. 7 , and the repeated description will be omitted. 
     The sealing portion  241  may include a first sealing portion  242 , a second sealing portion  243 , a third sealing portion  244 , and a fourth sealing portion  245 . The sealing portion  241  may further include the third sealing portion  244 , when comparing with the sealing portion  231  of the sealing member  230  of  FIG. 7 . 
     The third sealing portion  244  may be provided to extend from one side of the second sealing portion  243 . The third sealing portion  244  may be provided to extend in parallel with the first sealing portion  242 . As illustrated in  FIG. 12 , the third sealing portion  244  may be provided to be in contact with an outer surface  201   c  of the dust collecting case while the discharge cover  220  is coupled with the dust collecting case  110 . Therefore, the sealing member  240  is in contact with the outer surface  201   c  of the dust collecting case other than the inner surface  201   a  and the coupling surface  201   b  of the dust collecting case, and may enhance the sealing effect. 
       FIGS. 13 and 14  are views illustrating a second modified example of the sealing member of  FIG. 7 . 
     Referring to  FIGS. 13 to 14 , a sealing member  250  may include a sealing portion  251 , a connection portion  255 , and a coupling portion  256 . When comparing with the sealing member  230  of  FIG. 7 , the sealing member  250  is different from the sealing member  230  in a structure of the sealing portion  251 , and other structures thereof are the same as those of the sealing member  230  of  FIG. 7 . Hereinafter, the sealing member  250  will be described centering on a difference from the sealing member  230  of  FIG. 7 , and the repeated description will be omitted. 
     The sealing portion  251  may include a first sealing portion  252  and a second sealing portion  253 . When comparing with the sealing member  230  of  FIG. 7 , a structure corresponding to the third sealing portion  234  which is in contact with the coupling surface  227  of the discharge cover  220  may be omitted. 
     As illustrated in  FIG. 14 , the first sealing portion  252  and the second sealing portion  253  are in contact with the inner surface  201   a  and the coupling surface  201   b  of the dust collecting case, and thus the sealing portion  251  may perform the sealing operation. The first sealing portion  252  may be provided so that one side of the first sealing portion  252  is in contact with the inner surface  201   a  of the dust collecting case at the second position, and the other side thereof is in contact with the coupling surface  228  of the discharge cover  220 . Therefore, the sealing member  250  may seal the dust collecting case  110  and the discharge cover  220  with a simpler structure than that of the sealing member  230  of  FIG. 7 . 
       FIGS. 15 and 16  are views illustrating a third modified example of the sealing member of  FIG. 7 . 
     Referring to  FIGS. 15 and 16 , a sealing member  510  may have a coupling groove  511  formed at an upper surface thereof. The coupling groove  511  may be installed at the discharge cover  220  to face the coupling surface  201   b  of the dust collecting case. A first inclined surface  512   a  and a second inclined surface  512   b  may be provided at an upper surface of the sealing member  510  to have a v shape which is recessed downward. The first inclined surface  512   a  and the second inclined surface  512   b  may form the coupling groove  511 . The sealing member  510  may be formed of a material having a restoring force. 
     As illustrated in  FIG. 16 , when the discharge cover  220  is coupled with the dust collecting case  110 , the sealing member  510  may be in surface contact with a part of a lower portion of the dust collecting case  110 . The sealing member  510  may be in surface contact with the dust collecting case  110  while deformed so that the first and second inclined surfaces  512   a  and  512   b  surrounds a part of the lower portion of the dust collecting case  110 . The sealing member  510  may be in surface contact with a lower surface of the dust collecting case  110 , an outer surface thereof connected with the lower surface, and an inner surface thereof connected with the lower surface. Therefore, a contact area between the sealing member  410  and the dust collecting case  110  may be increased, and the sealing effect may be enhanced. 
     Also, when the discharge cover  220  is separated from the dust collecting case  110 , the sealing member  510  may be easily separated from the dust collecting case  110  due to the restoring force. When the sealing member  510  is started to be separated from the dust collecting case  110 , the sealing member  510  may be restored to have a shape illustrated in  FIG. 15  due to the restoring force, and thus may be easily separated from the dust collecting case  110 . 
       FIGS. 17 and 18  are views illustrating a fourth modified example of the sealing member of  FIG. 7 . 
     Referring to  FIGS. 17 and 18 , a sealing member  520  may include a body portion  521 , a contact portion  522 , and a coupling groove  523 . The body portion  521  may be installed at an upper surface of the discharge cover  220 . The contact portion  522  and the coupling groove  523  may be provided at an upper surface of the body portion  521 . The contact portion  522  may include a first contact portion  522   a  and a second contact portion  522   b . The first contact portion  522   a  may be provided to have a shape which extends upward from an upper surface of the body portion  521 . The first contact portion  522   a  may be provided to extend at an obtuse angle with respect to the upper surface of the body portion  521 . The second contact portion  522   b  and the first contact portion  522   a  may be provided to form bilateral symmetry at the upper surface of the body portion  521 . The first and second contact portions  522   a  and  522   b  and the upper surface of the body portion  521  may form the coupling groove  523 . The coupling groove  523  may be provided as a space surrounded by the first and second contact portions  522   a  and  522   b  and the upper surface of the body portion  521 . The sealing member  520  may be formed of the material having the restoring force. 
     As illustrated in  FIG. 18 , when the discharge cover  220  and the dust collecting case  110  are coupled with each other, the sealing member  520  may be in surface contact with a part of the lower portion of the dust collecting case  110 . When the dust collecting case  110  is moved down while being in contact with the upper surface of the body portion  521 , the sealing member  520  may be deformed so that the first and second contact portions  522   a  and  522   b  are in surface contact with the inner surface and the outer surface of the dust collecting case  110 . Therefore, when the discharge cover  220  and the dust collecting case  110  are coupled with each other, the sealing member  520  may be in surface contact with the coupling surface, the inner surface and the outer surface of the lower end of the dust collecting case  110 , and thus a sealed area may be increased. Therefore, the sealing effect of the sealing member  520  may be enhanced. 
     Also, when the discharge cover  220  and the dust collecting case  110  are separated from each other, the sealing member  520  may be easily separated from the dust collecting case  110  due to the restoring force. When the sealing member  520  is started to be separated from the dust collecting case  110 , the sealing member  520  may be restored to have a shape illustrated in  FIG. 17  due to the restoring force, and thus may be easily separated from the dust collecting case  110 . 
       FIGS. 19 and 20  are views illustrating a fifth modified example of the sealing member of  FIG. 7 . 
     Referring to  FIGS. 19 and 20 , a sealing member  530  may include a contact portion  531  and a support portion  533 . The contact portion  531  may be provided to be supported by the support portion  533  and to face the lower end of the dust collecting case  110 . The contact portion  531  may be provided to have a triangular cross section. The contact portion  531  may be provided to be inserted into a coupling groove  201   d  provided at the lower end of the dust collecting case  110 . The coupling groove  201   d  may be provided at the lower end of the dust collecting case  110  to have a shape corresponding to the contact portion  531 . The sealing member  530  may be formed of the material having the restoring force. 
     The support portion  533  may be provided to support the contact portion  531 . The support portion  533  may be provided so that one side thereof is coupled to the discharge cover  220  and the other side thereof is coupled to the contact portion  531 . The support portion  533  may be provided to be bent a plurality of times. Therefore, as illustrated in  FIG. 20 , when the dust collecting case  110  is moved down together with the contact portion  531 , the support portion  533  may be deformed while a longitudinal length thereof is reduced. 
     As illustrated in  FIG. 20 , when the discharge cover  220  and the dust collecting case  110  are coupled with each other, the sealing member  530  may be inserted into and in surface contact with the coupling groove  201   d . Therefore, when the discharge cover  220  and the dust collecting case  110  are coupled with each other, the sealing member  530  is in surface contact with the coupling groove  201   d  of the dust collecting case  110 , and thus the sealed area may be increased. Therefore, the sealing effect of the sealing member  530  may be enhanced. 
     Also, when the discharge cover  220  and the dust collecting case  110  are separated from each other, the sealing member  530  may be easily separated from the dust collecting case  110  due to the restoring force of the support portion  533 . When the sealing member  530  is started to be separated from the dust collecting case  110 , the sealing member  530  may be restored to have a shape illustrated in  FIG. 19  due to the restoring force, and thus may be easily separated from the dust collecting case  110 . 
       FIGS. 21 and 22  are views illustrating a sixth modified example of the sealing member of  FIG. 7 . 
     Referring to  FIGS. 21 and 22 , a sealing member  540  may include a contact portion  541  and a support portion  543 . The contact portion  541  may be provided to be supported by the support portion  543  and to face the lower end of the dust collecting case  110 . The contact portion  541  may be provided to have a cylindrical shape having a hollow  541   a . The contact portion  541  may be provided to face a coupling groove  201   e  provided at the lower end of the dust collecting case  110 . The sealing member  540  may be formed of the material having the restoring force. 
     The support portion  543  may be provided to support the contact portion  541 . The support portion  543  may be provided so that one side thereof is coupled to the discharge cover  220  and the other side thereof is coupled to the contact portion  541 . 
     As illustrated in  FIG. 22 , when the discharge cover  220  and the dust collecting case  110  are coupled with each other, the sealing member  540  may provide the sealing effect while being in contact with the coupling groove  201   e . While the contact portion  541  is pressed by being in contact with the dust collecting case  110 , the sealing member  540  may be deformed at the coupling groove  201   e  to have an elliptical shape. Therefore, a contact surface area between the contact portion  541  and the dust collecting case  110  may be increased, and thus the sealing effect thereof may be enhanced. 
     Also, when the discharge cover  220  and the dust collecting case  110  are separated from each other, the sealing member  540  may be easily separated from the dust collecting case  110  due to the restoring force of the contact portion  541 . When the sealing member  540  is started to be separated from the dust collecting case  110 , the sealing member  540  may be restored to have a shape illustrated in  FIG. 21  due to the restoring force, and thus may be easily separated from the dust collecting case  110 . 
       FIGS. 23 and 24  are views illustrating a seventh modified example of the sealing member of  FIG. 7 . 
     Referring to  FIGS. 23 and 24 , a sealing member  550  may be provided in a shape which surrounds a part of an upper side of the discharge cover  220 . The sealing member  550  may be provided to have a shape which surrounds a coupling groove  220   b  formed at an upper surface of the discharge cover  220 . The coupling groove  220   b  may be formed at a position facing the dust collecting case  110  so that the dust collecting case  110  may be inserted therein. The sealing member  550  may be formed of the material having the restoring force. 
     As illustrated in  FIG. 24 , when the discharge cover  220  and the dust collecting case  110  are coupled with each other, the sealing member  550  may be inserted into the coupling groove  220   b  together with the dust collecting case  110  while being in surface contact with the lower surface, the inner surface and the outer surface of the dust collecting case  110 . Therefore, when the discharge cover  220  and the dust collecting case  110  are coupled with each other, the sealing member  550  is in surface contact with the dust collecting case  110 , and thus the sealed area may be increased. Thus, the sealing effect of the sealing member  550  may be enhanced. 
     Also, when the discharge cover  220  and the dust collecting case  110  are separated from each other, the sealing member  550  may be easily separated from the dust collecting case  110  due to the restoring force of the sealing member  550 . When the sealing member  550  is started to be separated from the dust collecting case  110 , the sealing member  550  may be restored to have a shape illustrated in  FIG. 23  due to the restoring force, and thus may be easily separated from the dust collecting case  110 . 
     Hereinafter, a dust collecting device according to another embodiment of the present invention will be described. 
       FIG. 25  is an exploded perspective view illustrating the dust collecting device including a dust catching member according to another embodiment of the present invention,  FIG. 26  is a cross-sectional view illustrating a cross section of the dust collecting device of  FIG. 25 , and  FIG. 27  is a cross-sectional view illustrating a discharge cover including the dust catching member of  FIG. 25 . 
     Referring to  FIGS. 25 to 27 , a dust collecting device  101  may include the dust collecting case  110 , the discharge cover  220 , and a dust catching member  265 . When comparing with the dust collecting device  100  of  FIG. 3 , the dust collecting device  101  is different from the dust collecting device  100  in the dust catching member  265 , and other structures thereof are the same as those of the dust collecting device  100  of  FIG. 3 . Hereinafter, the dust collecting device  101  will be described centering on a difference from the dust collecting device  100  of  FIG. 3 , and the repeated description will be omitted. 
     First, the dust catching member  265  may be provided at an inner surface of the discharge cover  260 . A plurality of dust catching members  265  may be installed at an inner bottom surface of the discharge cover  260 . The plurality of dust catching members  265  may be provided to be spaced at regular intervals from each other. 
     The dust catching member  265  may be configured with a plurality of protrusions which are provided to extend upward from the lower surface of the discharge cover  260  and to be spaced at regular intervals. The plurality of protrusions may be provided so that each cross section thereof is gradually reduced upward. Therefore, the dust catching member  265  may be provided so that a distance between the protrusions is gradually increased upward. The dust catching member  265  may be provided in a comb shape. 
     As illustrated in  FIG. 26 , the dust catching member  265  may be provided to be located at the first dust collecting chamber  205   a  while the discharge cover  260  is coupled to the dust collecting case  110 . The dust catching member  265  may be provided so that an upper end thereof is located lower than a grill unit  170 . 
     The dust catching member  265  may be provided so that the dust moved with the rotating air current in the first dust collecting chamber  205   a  is caught by the plurality of protrusions. The dust catching member  265  may be provided so that the rotating air passes through spaces among the plurality of protrusions and the dust is caught by the protrusions. Therefore, the dust catching member  265  may separate the dust while minimizing obstruction of a flow of the rotating air current in the first dust collecting chamber  205   a . Also, the dust catching member  265  may prevent the dust from being scattered in the first dust collecting chamber  205   a.    
     The dust catching member  265  may be provided in a plurality of units each of which has the plurality of protrusions. The plurality of protrusions provided in each unit may be provided to have different distances and heights from each other. Therefore, the dust catching member  265  may remove the dust having various sizes. 
       FIG. 28  is a view illustrating the discharge cover including a first modified example of the dust catching member of  FIG. 25 . 
     Unlike the dust catching member  265 , a dust catching member  275  may be provided in a plate shape. The dust catching member  275  may be provided to have a rounded shape having the same curvature. Therefore, the dust catching member  275  may reduce resistance of the rotating air in the first dust collecting chamber  205   a.    
     A plurality of dust catching members  275  may be provided. The plurality of dust catching members  275  may be disposed to have a predetermined distance therebetween. Therefore, the dust catching members  275  may form a passage between the dust catching members  275  through which the rotating air flows. A space formed between the dust catching members  275  may pass only the rotating air, and the dust contained in the air may be caught and separated by the dust catching members  275 . 
     The plurality of dust catching members  275  may form one dust catching unit. For example, the dust catching unit configured with the plurality of dust catching members  275  may be disposed on a lower surface of a discharge cover  270  to have a predetermined distance between the dust catching members  275 . As illustrated in  FIG. 18 , three dust catching units each of which is configured with the plurality of dust catching members  275  may be provided to have predetermined distances among them. Three or more, or three or less dust catching units may be provided. 
     In one dust catching unit having the plurality of dust catching members  275 , each dust catching member  275  may be provided to have a different size. The plurality of dust catching members  275  may be provided so that sizes thereof are gradually increased from a center of the discharge cover  270  toward an edge thereof. Alternatively, the plurality of dust catching members  275  may be provided to have the same size. 
       FIG. 29  is a perspective view illustrating a dust collecting device including a second modified example of the dust catching member of  FIG. 25 , and  FIG. 30  is a view illustrating a cross section of the dust collecting device of  FIG. 29 . 
     Referring to  FIGS. 29 and 30 , when comparing with the dust catching member  265  of  FIG. 27 , a dust catching member  290  is different from the dust catching member  265  in a providing position of the dust catching member  290 , and other structures thereof are the same as those of the dust catching member  265  of  FIG. 27 . Hereinafter, the dust catching member  290  will be described centering on a difference from the dust catching member  265  of  FIG. 27 . 
     The dust catching member  290  may be installed at an inner surface of the container body  201  which forms a side surface of the first dust collecting chamber  205   a . The dust catching member  290  may be provided to extend from the inner surface of the container body  201  toward a center of the first dust collecting chamber  205   a . The dust catching member  290  may be provided so that an upper end thereof is located lower than the grill unit  170 . A plurality of dust catching members  290  may be provided at the inner surface of the container body  201  to have a predetermined distance therebetween. Although not shown in the drawings, the plurality of dust catching members  290  may be provided to be located at different heights from each other. 
     Due to the above-described structure, the dust catching member  290  may separate the dust from the air rotated in the first dust collecting chamber  205   a . Also, the dust catching member  290  may be provided so that the flow of the rotating air is not restricted by a distance between the plurality of protrusions. Therefore, dust separation efficiency of the dust collecting device  100  may be enhanced. 
     Referring to  FIGS. 3 and 4  again, the dust collecting device  100  may further include a cyclone assembly  140 . 
     The cyclone assembly  140  may be provided at an inside of the dust collecting case  110 . The cyclone assembly  140  is provided to generate the rotating air current and to separate the dirt from the air due to the centrifugal force. The rotating air current is generated when the fan motor (not shown) provided in the main body  10  is driven. 
     The cyclone chambers  142  and  144  in which the rotating air current is generated may be provided at the inside of the dust collecting case  110 . In the cyclone chambers  142  and  144 , the dust is separated from the air due to the centrifugal force. The cyclone chambers  142  and  144  may include the first cyclone chamber  142  and the second cyclone chamber  144 . 
     The first cyclone chamber  142  may be formed by the grill unit  170 , a cyclone body  150 , and the dust collecting case  110 . The second cyclone chamber  144  may be formed by the cyclone body  150  and at least one cyclone  300 . 
     In another aspect, arrangement relationship of the dust collecting device  100  is as follows. The arrangement relationship of the dust collecting device  100  may be described through a flow of the air. When a direction in which the air introduced through the inlet  111  flows toward the outlet  112  is defined as a flowing direction X, the upper case  120  may be located at a downstream side of the flowing direction X, and the dust collecting container  200  may be located at an upstream side of the flowing direction X. The cyclone assembly  140  may be located between the upper case  120  and the dust collecting container  200 . The filter member  134  may be disposed at a downstream side of the cyclone assembly  140  in the flowing direction X to remove the remaining dust from the air that has passed through the cyclone assembly  140 . Specifically, the filter member  134  may be disposed at a downstream side of an upper cyclone body  152  in the flowing direction X to transfer the air passing through an exhaust hole  154 . 
       FIG. 31  is a perspective view illustrating the grill unit of  FIG. 3 ,  FIG. 32  is a perspective view illustrating the cyclone body of  FIG. 3 ,  FIG. 33  is a cut-away perspective view illustrating a coupling structure of the grill unit and the cyclone body of  FIG. 3 , and  FIG. 34  is a view of the dust collecting device taken along a line A-A′ of  FIG. 4 . Hereinafter, at least one cyclone  300  may be referred to as at least one dust separating part or corn. Hereinafter, the upper cyclone body  152  may be referred to as a cover. Hereinafter, the dust collecting container  200  may be referred to as a dust accommodating portion. 
     Referring to  FIGS. 31 to 34 , the cyclone assembly  140  may include the grill unit  170  and the cyclone body  150 . 
     The cyclone body  150  may be disposed at the inside of the duct collecting case  110 . Also, the cyclone body  150  may be provided so that the grill unit  170  is seated thereat. The cyclone body  150  serves to guide the air discharged from the first cyclone chamber  142 , such that the air passes through the grill unit  170  and then flows to the second cyclone chamber  144 . 
     The cyclone body  150  may include the upper cyclone body  152  and a lower cyclone body  156 . The grill unit  170  and at least one cyclone  300  in which the second cyclone chamber  144  is formed may be seated at the lower cyclone body  156 . A guide tube  155  which guide the air passing through a grill housing  171  to be introduced into the second cyclone chamber  144  from the first cyclone chamber  142  may be formed at the upper cyclone body  152 . Also, the upper cyclone body  152  may be coupled to at least one cyclone  300  so that the air introduced through the inlet  111  is guided to at least one cyclone  300 . The upper cyclone body  152  will be described later. 
     A unit seating part  160  may be provided at the lower cyclone body  156  so that one end of the grill unit  170  is seated thereat. A coupling protrusion (not shown) may be formed at the unit seating part  160  so that the grill unit  170  is fixed thereto, and a coupling groove  162  corresponding to the coupling protrusion (not shown) may be formed at the grill unit  170 . 
     The grill unit  170  may be provided at the inside of the dust collecting case  110 . Also, the grill unit  170  may be provided to remove the dust having a predetermined size or more from the air discharged from the first cyclone chamber  142 . 
     The grill unit  170  may include a grill body  180  and an inlet tube  182 . 
     The inlet tube  182  may be provided to guide the air introduced from the inlet  111  of the suction port  220   a  to the first cyclone chamber  142 . Therefore, one end of the inlet tube  182  may be provided to be in communication with the inlet  111  of the suction port  220   a , and the other end thereof may be provided to be in communication with the first cyclone chamber  142 . 
     The inlet tube  182  may include an inlet hole  170   a  which is provided at one end of an inlet tube body  182   a  to be in communication with the inlet  111 , and a guide portion  184  which is provided at the other end of an inlet tube body  182   a  to guide the air to the first cyclone chamber  142 . The guide portion  184  may extend from the inlet tube body  182   a  to be bent in a radial direction with respect to a lengthwise direction of the inlet tube body  182   a.    
     The guide portion  184  may include a discharge guide surface  184   a  formed to have a curved surface so that the air guided through a first passage P 1  in the inlet tube body  182   a  is spirally discharged in a proceeding direction of the first passage P 1 . The discharge guide surface  184   a  allows a flowing direction of the air discharged through the guide portion  184  to be smoothly changed to a circumferential direction. 
     By such a structure, the air introduced through the suction part  21  may pass through the inlet  111 , may be introduced into the inlet tube  182  through the inlet hole  170   a , and then may be discharged to the first cyclone chamber  142  through the guide portion  184 . The first passage P 1  is formed in the inlet tube  182 . The first passage P 1  is provided so that the air introduced into the first cyclone chamber  142  passes therethrough. 
     The grill body  180  is provided to remove the dust having the predetermined size or more in the first cyclone chamber  142 . 
     An outlet hole  170   b  provided to be in communication with the discharge port  122  may be formed at the grill body  180 . The air introduced from the first cyclone chamber  142  to the grill body  180  is discharged to an outside of the grill unit  170  through the outlet hole  170   b  provided at one end of the grill body  180 . The air discharged through the outlet hole  170   b  is introduced into the second cyclone chamber  144  through the guide tube  155 . 
     The grill body  180  is provided to divide the first cyclone chamber  142  from the outlet hole  170   b  or the discharge port  122  and thus to prevent the dust separated by generating the rotating air current in the first cyclone chamber  142  from passing through the first cyclone chamber  142  and then being discharged through the outlet hole  170   b  or the discharge port  122 . Specifically, a plurality of air passing holes  181  disposed to be spaced a predetermined distance, such that the dust may be prevented from passing therethrough and the air from which the dust is separated by the centrifugation may pass therethrough, may be formed at the grill body  180 . 
     The grill body  180  may be provided to be separated from the inlet tube  182 . In the embodiment, the grill body  180  and the inlet tube  182  may be provided to be separated from each other, and also may be integrally formed with each other. The grill body  180  may be provided to surround the inlet tube  182 . A second passage P 2  may be formed between an outer surface of the inlet tube  182  and the grill body  180 . Specifically, the grill body  180  is provided to be spaced a predetermined distance from the outer surface of the inlet tube  182 , and the second passage P 2  is formed between the outer surface of the inlet tube  182  and the grill body  180 . 
     The first passage P 1  which is formed in the inlet tube  182  to guide the air introduced from the inlet hole  170   a  and the second passage P 2  which is formed between the inlet tube  182  and the grill body  180  to guide the air introduced from the first cyclone chamber  142  into the grill body  180  to the outlet hole  170   b  may be formed together at the grill unit  170 . The first and second passages P 1  and P 2  may be formed in the same direction. In a different point of view, the inlet tube body  182   a  and the grill body may be disposed so that center lines thereof in a lengthwise direction coincide with each other. 
     Since the first and second passages P 1  and P 2  are disposed together at an inside of the grill unit  170 , a structure of the cyclone assembly  140  may be simplified. Also, since the first and second passages P 1  and P 2  are disposed at the inside of the grill unit  170  in the same direction, it is not necessary to provide separately an air tube which guides the air introduced to introduce the air from the suction part  21  to the cyclone chambers  142  and  144 , and since the air introduced from the suction part  21  may be directly introduced into the cyclone chambers  142  and  144 , passage resistance may be reduced. 
     The cyclone assembly  140  may include an air current forming part  166 . The air current forming part  166  is provided so that the air guided from the inlet tube  182  to the first cyclone chamber  142  may be rotated. 
     The air current forming part  166  is provided so that the air introduced into the first cyclone chamber  142  forms the rotating air current. The air current forming part  166  is provided at the cyclone body  150 . Also, the air current forming part  166  is provided so that the air passing through the first passage P 1  forms the rotating air current while being discharged to the guide portion  184  and introduced into the first cyclone chamber  142 . In the embodiment of the present invention, the air current forming part  166  is formed at the cyclone body  150 , but an arrangement and a shape of the air current forming part  166  may be changed variously. 
     The air current forming part  166  may be formed along a circumference of the grill unit  170 . That is, the air current forming part  166  is may be disposed at the cyclone body  150  along the circumference of the grill unit  170 . 
     The air current forming part  166  may include a first air current guide surface  167  and a second air current guide surface  168 . 
     The first air current guide surface  167  is a guide surface of which at least a part is formed to be concave and with which the air discharged from the inlet tube  182  is in contact, such that the air guided to the first cyclone chamber  142  is rotated in a circumferential direction centering on the grill unit  170 . That is, the first air current guide surface  167  is provided to be concave, such that a flowing direction of the air discharged to the guide portion  184  is curved in the circumferential direction. Also, the first air current guide surface  167  may be formed to have a curved surface, such that a direction of the air discharged from the guide portion  184  is smoothly changed. A shape of the first air current guide surface  167  may be modified variously. 
     The second air current guide surface  168  is a guide surface which is formed to be inclined toward the first cyclone chamber  142  in the circumferential direction centering on the grill unit  170 . In the embodiment of the present invention, since the grill unit  170  is disposed at a lower portion of the cyclone body  150 , the second air current guide surface  168  is provided to protrude downward from the cyclone body  150  in the circumferential direction centering on the grill unit  170 . By such a structure, the air rotated in the circumferential direction by the first air current guide surface  167  may flow toward the first cyclone chamber  142 . 
     Since the guide portion  184  provided at the end of the inlet tube  182  and the air passing hole  181  of the grill body  180  are provided adjacent to each other, there may be a problem in that the air discharged from the guide portion  184  is directly introduced into the air passing hole  181 . To solve the problem, the grill unit  170  may further include an air current forming rib  186 . 
     The air current forming rib  186  may be provided toward the first cyclone chamber  142  to be adjacent to the guide portion  184 . By providing the air current forming rib  186 , the air discharged from the guide portion  184  may be spaced from the grill body  180  and then may be introduced into the first cyclone chamber  142 . 
     The grill unit  170  may further include a flange grill part  188 . 
     The flange grill part  188  may be provided to divide the first cyclone chamber  142  from the first dust collecting chamber  205   a . The flange grill part  188  may be formed to extend from the outer surface of the inlet tube  182  to prevent the dust collected in the first dust collecting chamber  205   a  from flowing back toward the first cyclone chamber  142 . 
     The flange grill part  188  may have a grill shape to prevent movement of the dust. Also, the flange grill part  188  may be in contact with a lower portion of the grill body  180  to prevent the dust separated by the centrifugation from being moved to the second passage P 2 . The plurality of air passing holes  181  may also be formed at flange grill part  188 , like the grill body  180 . 
     Further, the flange grill part  188  may be provided to be inclined toward the first dust collecting chamber  205   a , such that the air is prevented from flowing back from the first dust collecting chamber  205   a  toward the first cyclone chamber  142 . That is, since the flange grill part  188  has a flange shape which is inclined toward the first dust collecting chamber  205   a  between the first cyclone chamber  142  and the first dust collecting chamber  205   a , the air may be effectively prevented from flowing back from the first dust collecting chamber  205   a.    
     The cyclone assembly  140  may further include the second cyclone chamber  144 . 
     The second cyclone chamber  144  may be disposed in a radial direction of the first cyclone chamber  142 . The second cyclone chamber  144  may be provided at an inside of at least one cyclone  300 . Further, the second cyclone chamber  144  may be provided to perform secondarily the centrifugation with respect to the air from which the dust is primarily separated by the first cyclone chamber  142 . Specifically, the air introduced from the first cyclone chamber  142  into the grill unit  170  flows to the at least one cyclone  300  through the guide tube  155  of the cyclone body  150 , and then is secondarily separated from the dust through the centrifugation in the second cyclone chamber  144  provided in the at least one cyclone  300 . 
     The at least one cyclone  300  may be disposed to separate the dust from the air introduced through the inlet  111 . 
     The at least one cyclone  300  may be disposed at the dust collecting case  110 . 
     The at least one cyclone  300  may be disposed at the inside of the dust collecting case  110  to separate the dust from the air introduced through the inlet  111 . Specifically, the at least one cyclone  300  may be disposed along a circumference of the lower cyclone body  156 . 
     The second cyclone chamber  144  may be formed at an inside of the at least one cyclone  300 . In the second cyclone chamber  144 , the dust is centrifugally separated from the air. 
     The at least one cyclone  300  may include an air introducing hole  301  and a dust discharging hole  302 . The air introducing hole  301  may be provided so that the air introduced through the inlet  111  is introduced into the at least one cyclone  300 . The dust discharging hole  302  may be provided to be opened toward the dust collecting container  200 . Alternatively, the dust discharging hole  302  may be provided to be in communication with the dust collecting container  200 . Also, the air introducing hole  301  may be located at an upper portion in a lengthwise direction L of the at least one cyclone  300 . The dust discharging hole  302  may be located at a lower portion in the lengthwise direction L of the at least one cyclone  300 . That is, the dust discharging hole  302  may be provided tougher with the air introducing hole  301  in the lengthwise direction L of the at least one cyclone  300  so that the dust separated from the air introduced through the air introducing hole  301  is discharged therethrough. 
     In another aspect, the at least one cyclone  300  may include a body  303 , the air introducing hole  301  and the dust discharging hole  302 . The body  303  forms an exterior of the at least one cyclone  300 , and the air introducing hole  301  and the dust discharging hole  302  may be formed at both ends of the body  303 , respectively. 
     The air introducing hole  301  may be relatively wide, and the dust discharging hole  302  may be relatively narrow. That is, a width of the air introducing hole  301  may be larger than that of the dust discharging hole  302 . This is to maximize dust separation efficiency of the at least one cyclone  300 . That is, since the width of the dust discharging hole  302  is formed smaller than that of the air introducing hole  301 , the centrifugal force of the air containing the dust, i.e., the contaminant air may be increased. A greater centrifugal force may be generated at the dust discharging hole  302  having the relatively small width. 
     The body  303  may include at least one of a flat surface and a curved surface. The curved surface may include at least one of a curved surface which is convex in an outer direction of the at least one cyclone  300  and a curved surface which is concave in an inner direction of the at least one cyclone  300 . 
     The at least one cyclone  300  may have a truncated cone shape. The air introducing hole  301  may be provided at one end of the at least one cyclone  300 , and the dust discharging hole  302  may be provided at the other end thereof. A diameter of the air introducing hole  301  may be greater than that of the dust discharging hole  302 . When the at least one cyclone  300  may have the truncated cone shape, the body  303  may have the flat surface. However, a shape of the at least one cyclone  300  is not limited to the truncated cone shape. 
     The at least one cyclone  300  may have a symmetric shape with respect to an axis S of symmetry which is in parallel with the lengthwise direction L of the at least one cyclone  300 . 
     A cleaner  1  according to one embodiment of the present invention may include a canister type, an up-right type and a handy type, but the present invention is not limited thereto. 
     In this specification, exemplary embodiments of the present invention have been classified into the first, second and third exemplary embodiments and described for conciseness. However, respective steps or functions of an exemplary embodiment may be combined with those of another exemplary embodiment to implement still another exemplary embodiment of the present invention. 
     DETAILED DESCRIPTION OF MAIN ELEMENTS 
     
       
         
           
               
               
               
             
               
                   
                   
               
             
            
               
                   
                  1: cleaner 
                  10: main body 
               
               
                   
                  10a: first body port 
                  10b: second body port 
               
               
                   
                  11: installation part 
                  20: extension tube 
               
               
                   
                  21: suction part 
                  23: flexible hose 
               
               
                   
                  30: handle tube 
                  31: handle part 
               
               
                   
                  32: operation part 32 
                  50: wheel assembly 
               
               
                   
                 100: dust collecting device 
                 110: dust collecting case 
               
               
                   
                 111: inlet 
                 112: outlet 
               
               
                   
                 120: upper case 
                 130: middle case 
               
               
                   
                 132: upper opening 
                 134: filter member 
               
               
                   
                 136: hinge portion 
                 140: cyclone assembly 
               
               
                   
                 142: first cyclone chamber 
                 144: second cyclone chamber 
               
               
                   
                 150: cyclone body 
                 152: upper cyclone body 
               
               
                   
                 153: protrusion 
                 153a: edge portion 
               
               
                   
                 153b: bridge 
                 154, 154a, 154b: exhaust hole 
               
               
                   
                 156: lower cyclone body 
                 160: unit seating part 
               
               
                   
                 166: air current forming part 
                 167: first air current guide surface 
               
               
                   
                 168: second air current guide surface 
                 170: grill unit 
               
               
                   
                 170a: inlet hole 
                 170b: outlet hole 
               
               
                   
                 171: grill housing 
                 171a: first inlet part 
               
               
                   
                 172: first filter member 
                 173: inlet tube 
               
               
                   
                 173a: inlet tube body 
                 174: guide portion 
               
               
                   
                 176: air current forming rib 
                 200: dust collecting container 
               
               
                   
                 201: container body 
                 202: container outer wall 
               
               
                   
                 203: container inner wall 
                 205: dust collecting chamber 
               
               
                   
                 205a: first dust collecting chamber 
                 205b: second dust collecting chamber 
               
               
                   
                 205c: discharge chamber 
                 205d: dust discharging port 
               
               
                   
                 220: discharge cover 
                 230: sealing member 
               
               
                   
                 231: sealing portion 
                 235: connection portion 
               
               
                   
                 236: coupling portion 
                 α: first angle 
               
               
                   
                 300, 300a: cyclone 
                 301: air introducing hole 
               
               
                   
                 302: dust discharging hole 
                 303, 303a: body