Patent Publication Number: US-11647882-B2

Title: Dust collecting apparatus and cleaner having the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application is based on and claims priority under 35 U.S.C. § 119 of a Korean patent application number 10-2019-0027154, filed on Mar. 8, 2019, in the Korean Intellectual Property Office, and a Korean patent application number 10-2019-0154979, filed on Nov. 28, 2019, in the Korean Intellectual Property Office, the disclosure of each of which is incorporated by reference herein in its entirety. 
     BACKGROUND 
     1. Field 
     The disclosure relates to a dust collecting apparatus and a cleaner having the same. More particularly, the disclosure relates to a dust collecting apparatus having an improved structure and a cleaner having the same. 
     2. Description of Related Art 
     A cleaner is a device that removes rubbish and cleans indoors, and a vacuum cleaner is generally used at home. The vacuum cleaner suctions air using the suction power of a fan motor unit and separates rubbish from the suctioned air with a device such as a filter, thereby cleaning the room. The vacuum cleaner is classified into the canister type and the upright type. In recent years, a robot cleaner has been popular, and the robot cleaner can travel a region to be cleaned and suction rubbish such as dust from the region, thereby performing the cleaning operation by itself without user operation. 
     In order to filter out the rubbish contained in the suctioned air, the vacuum cleaner includes a dust collecting apparatus therein to filter out the rubbish by a predetermined filtering device. The filtering device for filtering out the rubbish in the dust collecting apparatus includes a porous filter unit in which air is passed through the porous filter, and the rubbish is forcedly filtered out, and a cyclone dust collecting apparatus for filtering out rubbish during cyclone flow of air. 
     As for the vacuum cleaner, the rubbish such as human hair or animal hair is tangled to the dust collecting apparatus during the rubbish is filtered out, and thus a user should manually separate the rubbish from the dust collecting apparatus, which causes the unsanitary and difficulty for the use of the vacuum cleaner. 
     The above information is presented as background information only to assist with an understanding of the disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the disclosure. 
     SUMMARY 
     Aspects of the disclosure are to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the disclosure is to provide a cleaner capable of easily discharging rubbish collected in a dust collecting apparatus from a dust chamber. 
     Another aspect of the disclosure is to provide a cleaner capable of preventing rubbish from scattering upon emptying a dust chamber. 
     Another aspect of the disclosure is to provide a cleaner having a reduced size. 
     Another aspect of the disclosure is to provide a cleaner capable of having an improved user convenience. 
     Another aspect of the disclosure is to provide a cleaner capable of preventing a dust chamber from being inadvertently opened. 
     Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments. 
     In accordance with an aspect of the disclosure, a cleaner is provided. The cleaner includes a suction head, a dust collecting apparatus having one end mounted on the suction head, and configured to form a dust chamber, and an extension member slidably mounted on the dust collecting apparatus. The extension member includes a rubbish removal member configured to be slidable in the dust chamber and configured to discharge rubbish of the dust chamber, and an opening and closing device configured to open and close the dust chamber and configured to interlock with the rubbish removal member, wherein the opening and closing device is an opening and closing frame. 
     The opening and closing device may include an opening and closing member, in which a chamber inlet is formed, and an opening and closing cover configured to open and close the chamber inlet by a suction force formed in the dust chamber. 
     One portion of the opening and closing cover may be fixed to the opening and closing member, and another portion different from the one portion may be deformable by the suction force formed in the dust chamber. 
     The opening and closing device may include an opening and closing sealing member configured to seal between the dust collecting apparatus and the opening and closing member. 
     The opening and closing sealing member may be arranged along an edge of the opening and closing member, and the opening and closing sealing member may be formed to include a more flexible material than the opening and closing member. 
     The extension member may include a connection portion configured to connect the rubbish removal member to the opening and closing device, and a discharge opening formed between the rubbish removal member and the opening and closing device and configured to discharge rubbish of the dust chamber. 
     The opening and closing device may move away from the dust collecting apparatus to open the dust chamber when the rubbish removal member slides to be moved out of the dust chamber, and the opening and closing device may move closer to the dust collecting apparatus to close the dust chamber when the rubbish removal member slides to be inserted into the dust chamber. 
     The extension member may include a handle arranged at an end opposite to one end of the extension member in which the opening and closing device is arranged, and a fan motor unit configured to generate a suction force for the dust chamber and arranged closer to the opening and closing device than the handle. 
     The cleaner may further include a battery arranged between the handle and the fan motor unit of the extension member. 
     The dust collecting apparatus may include a discharge port formed at a portion of a rear surface thereof corresponding to the position of the fan motor unit in a state in which the opening and closing device closes the dust chamber. 
     The cleaner further includes a motor filter configured to filter air introduced to the fan motor unit, the motor filter may be arranged between the fan motor unit and the dust chamber. 
     The dust collecting apparatus may include a filtering device arranged in the dust chamber and configured to filter out rubbish introduced through the suction head, and when the extension member slides with respect to the dust collecting apparatus, the rubbish removal member may be slidable in one surface of the filtering device on which the filtered out rubbish is placed. 
     The dust chamber may be a first dust chamber, the extension member may include a cyclone configured to remove rubbish from air passing through the first dust chamber, and the dust collecting apparatus may include a second dust chamber in which rubbish separated by the cyclone is collected. 
     The rubbish removal member may be a first rubbish removal member, and the extension member may include a second rubbish removal member configured to be slidable in the second dust chamber and the first dust chamber to discharge rubbish of the second dust chamber based on a sliding movement of the extension member with respect to the dust collecting apparatus. 
     In accordance with another aspect of the disclosure, a cleaner is provided. The cleaner includes a transfer device, and a dust collecting apparatus connectable to the transfer device and configured to filter out rubbish transferred from the transfer device. The dust collecting apparatus includes a housing in which a first dust chamber is formed, and including a guide recessed inwardly from an outer surface, a handle configured to be movable on the outside of the housing and provided to cover at least a portion of the guide, a first rubbish removal member configured to be movable inside the housing based on a movement of the handle, and configured to discharge rubbish collected in the first dust chamber, and a link configured to connect the handle to the first rubbish removal member, and having a movement guided by the guide. 
     The dust collecting apparatus may include a filtering device configured to filter out the rubbish received from the transfer device, and arranged in the first dust chamber. 
     The first rubbish removal member may include a first contact portion in close contact with an inner surface of the filtering device and formed to include a flexible material. 
     The dust collecting apparatus may include a rubbish separator arranged at a rear of the filtering device in a direction in which air introduced from the transfer device is discharged, and the rubbish separator is configured to filter out rubbish passing through the filtering device. 
     The dust collecting apparatus may include a filter member arranged at the rear of the rubbish separator in a direction in which air introduced from the transfer device is discharged, and configured to filter out rubbish passing through the rubbish separator. 
     The dust collecting apparatus may include a fan motor unit arranged at the rear of the filter member in a direction in which air introduced from the transfer device is discharged, and configured to generate a suction force. 
     The rubbish separator may include at least one cyclone. 
     The dust collecting apparatus may include a second dust chamber formed in the housing to collect rubbish that is filtered out by the rubbish separator. 
     The dust collecting apparatus may include a second rubbish removal member configured to be movable in the housing based on the movement of the handle and configured to discharge rubbish collected in the second dust chamber. 
     The second rubbish removal member may be arranged on one portion of the link between the first rubbish removal member and the handle and particularly arranged between the second dust chamber and the rubbish separator. 
     The second rubbish removal member may include a second contact portion in close contact with an inner surface of the second dust chamber and formed to include a flexible material. 
     The first rubbish removal member may be movable between a first position between the first dust chamber and the second dust chamber and a second position protruding to the outside of the housing. 
     The dust collecting apparatus may include a link sealing member configured to seal one portion of the housing in which the inside and the outside of the housing communicate with each other and to which the link is movably inserted. 
     The dust collecting apparatus may include a cover configured to open and close one portion of the housing in which the filter member is arranged. 
     The handle may be configured to cover one portion of the outer surface of the housing so as to be slidable along the outer surface of the housing, and the guide may extend along a direction in which the handle slides. 
     In accordance with another aspect of the disclosure, a dust collecting apparatus is provided. The dust collecting apparatus includes a housing in which a first dust chamber and a second dust chamber are formed, and including a guide recessed inwardly from an outer surface, a handle configured to be movable on the outside of the housing and provided to cover at least a portion of the guide, a first rubbish removal member configured to interlock with the handle and configured to be movable between a first position between the first dust chamber and the second dust chamber and a second position protruding to the outside of the housing, a second rubbish removal member configured to interlock with the handle and arranged with the first rubbish removal member to form the second dust chamber, and a link configured to connect the handle, the first rubbish removal member and the second rubbish chamber, and having a movement guided by the guide. 
     The dust collecting apparatus may further include a filtering device arranged in the first dust chamber and configured to filter out rubbish. 
     The dust collecting apparatus may further include a rubbish separator arranged at the rear of the filtering device and configured to filter out rubbish passing through the filtering device. 
     The dust collecting apparatus may further include a filter member arranged at the rear of the rubbish separator and configured to filter out rubbish passing through the rubbish separator. 
     In accordance with another aspect of the disclosure, a cleaner is provided. The cleaner includes a transfer device, and a dust collecting apparatus connectable to the transfer device. The dust collecting apparatus includes a filtering device configured to filter out rubbish transferred from the transfer device, a housing configured to form a dust chamber in which rubbish filtered out by the filtering device is collected, a rubbish separator arranged at the rear of the filtering device and configured to filter out rubbish passing through the filtering device, a filter member arranged at the rear of the rubbish separator and configured to filter out rubbish passing through the rubbish separator, a fan motor unit arranged at the rear of the filter member and configured to generate a suction force, and a rubbish remover including a handle configured to be movable on the outside of the housing and a rubbish removal member configured to be movable in the inside of the housing and configured to discharge rubbish collected in the dust chamber to the outside of the housing based on the movement of the handle. 
     Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses various embodiments of the disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features, and advantages of certain embodiments of the disclosure will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: 
         FIG.  1    is a perspective view of a cleaner according to an embodiment of the disclosure; 
         FIG.  2    is a view illustrating a state in which the cleaner of  FIG.  1    is used without an extension tube according to an embodiment of the disclosure; 
         FIG.  3    is an exploded view of the cleaner of  FIG.  1    according to an embodiment of the disclosure; 
         FIG.  4    is a view illustrating an interior of a dust collecting apparatus of  FIG.  3    according to an embodiment of the disclosure; 
         FIG.  5    is a cross-sectional view taken along line A-A′ of  FIG.  4    according to an embodiment of the disclosure; 
         FIG.  6    is a view illustrating a state in which a dust chamber of the dust collecting apparatus of  FIG.  4    is emptied according to an embodiment of the disclosure; 
         FIG.  7    is a view illustrating a state in which the dust collecting apparatus of the cleaner of  FIG.  4    collects dust according to an embodiment of the disclosure; 
         FIG.  8    is a cross-sectional view of the dust collecting apparatus of  FIG.  6    according to an embodiment of the disclosure; 
         FIG.  9    is a perspective view of a cleaner according to another embodiment of the disclosure according to an embodiment of the disclosure; 
         FIG.  10    is an exploded view illustrating the cleaner of  FIG.  9    according to an embodiment of the disclosure; 
         FIG.  11    is a cross-sectional view of the cleaner of  FIG.  9    according to an embodiment of the disclosure; 
         FIG.  12    is an enlarged view of a portion B of  FIG.  11    according to an embodiment of the disclosure; 
         FIG.  13    is an enlarged view of a portion C of  FIG.  11    according to an embodiment of the disclosure; 
         FIG.  14    is a view illustrating a state in which dust of the dust collecting apparatus of the cleaner of  FIG.  9    is discharged according to an embodiment of the disclosure; 
         FIG.  15    is a cross-sectional view of a portion of the cleaner of  FIG.  14    according to an embodiment of the disclosure; and 
         FIG.  16    is a cross-sectional view of a button device of the cleaner of in  FIG.  14    according to an embodiment of the disclosure. 
     
    
    
     Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures. 
     DETAILED DESCRIPTION 
     The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the disclosure as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the disclosure. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness. 
     The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the disclosure is provided for illustration purpose only and not for the purpose of limiting the disclosure as defined by the appended claims and their equivalents. 
     It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a component surface” includes reference to one or more of such surfaces. 
     In addition, the same reference numerals or signs shown in the drawings of the disclosure indicate elements or components performing substantially the same function. 
     Also, the terms used herein are used to describe the embodiments and are not intended to limit and/or restrict the disclosure. The singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. In this disclosure, the terms “including”, “having”, and the like are used to specify features, numbers, steps, operations, elements, components, or combinations thereof, but do not preclude the presence or addition of one or more of the features, elements, steps, operations, elements, components, or combinations thereof. 
     It will be understood that, although the terms first, second, third, etc., may be used herein to describe various elements, but elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the disclosure, a first element may be termed as a second element, and a second element may be termed as a first element. The term of “and/or” includes a plurality of combinations of relevant items or any one item among a plurality of relevant items. 
     Hereinafter an embodiment according to the disclosure will be described in detail with reference to the accompanying drawings. With respect to  FIG.  1   , a portion in which a suction head  10  is arranged may be defined as the front, a portion in which a dust collecting apparatus  100  is arranged may be defined as the rear, and a portion in which a gripping portion  101  is arranged may be defined as the lower side. That is, it is defined that air is introduced from the front of the cleaner  1  and discharged to the rear. However, the shape and position of each component is not limited by the terms defined in this way. 
       FIG.  1    is a perspective view of a cleaner according to an embodiment of the disclosure. 
       FIG.  2    is a view illustrating a state in which the cleaner of  FIG.  1    is used without an extension tube according to an embodiment of the disclosure. 
       FIG.  3    is an exploded view of the cleaner of  FIG.  1    according to an embodiment of the disclosure. 
     Referring to  FIGS.  1  to  3   , the cleaner  1  may include transfer devices  10  and  20  configured to suction rubbish such as human hair on a surface to be cleaned by using a suction force of air and guide the suctioned rubbish to the dust collecting apparatus  100 , and the dust collecting apparatus  100  configured to supply the suction force to the transfer devices  10  and  20  and configured to collect the rubbish transferred through the transfer devices  10  and  20 . 
     Referring to  FIG.  1   , the transfer devices  10  and  20  may include a suction head  10  configured to suction rubbish on the surface to be cleaned, and an extension tube  20  configured to guide the rubbish introduced through the suction head  10  to the dust collecting apparatus  100 . When the transfer devices  10  and  20  include the suction head  10  and the extension tube  20 , the cleaner  1  may easily clean a region far from the dust collecting apparatus  100 . 
     The suction head  10  is configured to suction rubbish such as dust on the surface to be cleaned while traveling on the surface to be cleaned. The suction head  10  may be detachably connected to one end of the extension tube  20 . 
     The suction head  10  may include a head  11  arranged to face the surface to be cleaned when the cleaner  1  is driven, and a neck  12  rotatably connected to the head  11 . An air flow path may be formed inside the head  11 . The air flow path formed inside the head  11  may communicate with the extension tube  20  through the neck  12 . Therefore, external air and rubbish introduced through the suction head  10  may be introduced into the extension tube  20  through the neck  12 . 
     The suction head  10  may include a head switch  13  for maintaining or releasing an engagement with the extension tube  20 . The head switch  13  may press one end of the extension tube  20  coupled to the neck  12  of the suction head  10  so as to fix a position of the extension tube  20  with respect to the suction head  10 . When a user intends to separate the extension tube  20  from the suction head  10 , the user may press the head switch  13  to release the extension tube  20  and then separate the extension tube  20 . The head switch  13  may include a locking portion (not shown), and when the locking portion is locked to an extension groove  22   a  of the extension tube  20 , the suction head  10  may be fixed to the extension tube  20 . 
     One end of the extension tube  20  may be connected to the suction head  10 , and the other end thereof may be connected to the dust collecting apparatus  100 . The extension tube  20  may form a part of the appearance of the cleaner  1 . 
     The extension tube  20  may include an extension case  21 . The extension case  21  may form an extension flow path (not shown) therein. The extension flow path may guide air, which passes through the suction head  10 , to the dust collecting apparatus  100 . 
     The extension tube  20  may include an extension insert  22  inserted into the neck  12  of the suction head  10 . When the extension insert  22  is inserted into the neck  12 , the extension tube  20  may be fixed to the suction head  10  based on the pressure applied to the extension insert  22  by the head switch  13 . The extension insert  22  may include the extension groove  22   a  in which one portion of the head switch  13  is inserted and locked thereto. 
     The extension tube  20  may include a suction force regulator  23 . The suction force regulator  23  may be configured to allow the extension tube  20  to selectively communicate with the outside of the extension tube. When the suction force regulator  23  is opened, the extension flow path of the extension tube  20  may be in communication with the outside of the extension tube  20 , and thus the suction force may be reduced. 
     The extension tube  20  may include a dust collecting apparatus fixing unit  24  for fixing the dust collecting apparatus  100  inserted into the extension tube  20 . When one end of the dust collecting apparatus  100  is inserted into the extension tube  20 , the dust collecting apparatus fixing unit  24  may press one end of the dust collecting apparatus  100  to fix the dust collecting apparatus  100  to the extension tube  20 . When a user intends to separate the extension tube  20  from the dust collecting apparatus  100 , the user may push the dust collecting apparatus fixing unit  24  to release the dust collecting apparatus  100  and then separate the dust collecting apparatus  100 . The dust collecting apparatus fixing unit  24  may include a locking portion (not shown), and when the locking portion of the dust collecting apparatus fixing unit  24  is locked to a connection groove  106   a  of the dust collecting apparatus  100 , the dust collecting apparatus fixing unit  24  may be fixed to the dust collecting apparatus  100 . 
     Referring to  FIG.  2   , unlike  FIG.  1   , the cleaner  1  may directly connect the suction head  10  to the dust collecting apparatus  100  without the extension tube  20 . Accordingly, the air flow path inside the head  11  may communicate with the dust collecting apparatus  100  through the neck  12 . Therefore, external air and rubbish introduced through the suction head  10  may flow into the dust collecting apparatus  100  through the neck  12 . In addition, through the head switch  13 , the engagement between the suction head  10  and the dust collecting apparatus  100  may be maintained or released. As a fixing portion of the head switch  13  is locked to the connection groove  106   a  of the dust collecting apparatus  100 , the suction head  10  may be fixed to the dust collecting apparatus  100 . 
     The dust collecting apparatus  100  may be connected to the transfer devices  10  and  20 . Particularly, the dust collecting apparatus  100  may be connected to the extension tube  20  as illustrated in  FIG.  1   , or connected to the suction head  10  as illustrated in  FIG.  2   . 
     The dust collecting apparatus  100  may include a dust collector  110  and a driver  140 . The dust collector  110  and the driver  140  may form a part of the appearance of the cleaner  1 . The driver  140  may be detachably provided at the dust collector  110 . The dust collector  110  may include a housing  111 . 
     The dust collecting apparatus  100  may include a gripping portion  101 . The gripping portion  101  may be arranged at the end of the driver  140  to facilitate the user gripping. When a user uses the cleaner  1 , the user may push or pull the suction head  10  by gripping the gripping portion  101 . 
     The dust collecting apparatus  100  may include a discharge port  102  formed at the other end opposite to one end connected to the transfer devices  10  and  20 . The discharge port  102  may be arranged on the rear surface of the driver  140 . The discharge port  102  may include a plurality of discharge holes. The position of the discharge port  102  is not limited to the rear surface of the driver  140  and may be formed on at least one surface of the upper surface and the left and right surface of the driver  140 . The discharge port  102  may be formed to discharge the filtered air. 
     The dust collecting apparatus  100  may include a battery mounting portion  105 . The battery mounting portion  105  may be provided below the driver  140 . A battery (not shown) configured to supply power for driving the cleaner  1  may be mounted to the battery mounting portion  105 . The battery may be a rechargeable battery. 
     The dust collecting apparatus  100  may include a connection port  106 . The connection port  106  may be detachably mounted to the dust collector  110 . The connection port  106  may be connectable to the neck  12  of the suction head  10  and/or the extension tube  20 . When the cleaner  1  is used as shown in  FIG.  1   , the connection port  106  may be inserted into one end of the extension tube  20  and fixed by the dust collecting apparatus fixing unit  24 . When the cleaner  1  is used as shown in  FIG.  2   , the connection port  106  may be inserted into the neck  12  of the suction head  10  and fixed by the head switch  13 . That is, the connection port  106  may be configured to be removably coupled to the transfer devices  10  and  20 . The connection port  106  may be provided to be compatible with various transfer devices  10  and  20 . When the rubbish is discharged from the dust chamber  120 , the connection port  106  may be separated from the housing  111  of the dust collector  110 . 
     The connection port  106  may include a connection switch  107  for maintaining or releasing the engagement with the dust collector  110 . The connection switch  107  may press a connection portion  111   a  of the housing  111  of the dust collector  110 , thereby fixing the position of the extension port  106  with respect to the dust collector  110 . When a user intends to separate the connection port  106  from the dust collector  110 , the user may press the connection switch  107  to release the housing  111  and then separate the extension tube  20 . The connection switch  107  may include a locking portion (not shown), and when the locking portion of the connection switch  107  is locked to a housing groove (not shown) formed in the connection portion  111   a  of the housing  111 , the connection port  106  may be fixed to the dust collector  110 . 
     The dust collecting apparatus  100  may include a rubbish remover  130 . The rubbish remover  130  may be configured to discharge rubbish collected in the dust chamber  120  (refer to  FIG.  4   ) to the outside of the dust chamber  120 . The rubbish remover  130  may be slidable with respect to the housing  111 . The rubbish remover  130  may be provided in the dust collector  110 . 
     The housing  111  of the dust collector  110  may include a guide  112  configured to guide the sliding movement of the rubbish remover  130 . The guide  112  may extend in the front and rear direction. The guide  112  may be arranged on opposite sides of the housing  111 . 
       FIG.  4    is a view illustrating an interior of a dust collecting apparatus of  FIG.  3    according to an embodiment of the disclosure. 
       FIG.  5    is a cross-sectional view taken along line A-A′ of  FIG.  4    according to an embodiment of the disclosure. 
       FIG.  6    is a view illustrating a state in which a dust chamber of the dust collecting apparatus of  FIG.  4    is emptied according to an embodiment of the disclosure. 
     Referring to  FIGS.  4  and  5   , in the dust collecting apparatus  100 , an operation switch  103  configured to control whether to operate the cleaner  1  may be provided. The operation switch  103  is configured to receive a user intension regarding the operation of the cleaner  1 . The operation switch  103  may be arranged on the gripping portion  101  for a user to easily operate the operation switch  103 . 
     The dust collecting apparatus  100  may include a fan motor unit  104  for generating a suction force required to suction the rubbish on the surface to be cleaned. The fan motor unit  104  may be configured to suction the outside air through the suction head  10  and discharge the suctioned air to the discharge port  102 . The fan motor unit  104  may be arranged inside the other end opposite to one end connected to the transfer devices  10  and  20  of the dust collecting apparatus  100 . The fan motor unit  104  may be arranged in the driver  140 . 
     The dust collecting apparatus  100  may include an opening and closing member  114  provided at the connection portion  111   a  of the housing  111  connected to the connection port  106 . One end of the housing  111  in which the connection portion  111   a  is arranged may be opened, and the opening and closing member  114  may be configured to open and close the one end of the housing  111 . The opening and closing member  114  may be configured to open and close a first dust chamber  121 . The opening and closing member  114  may include a chamber inlet  114   a  formed to allow air introduced from the transfer devices  10  and  20  to flow to the first dust chamber  121 . 
     The opening and closing member  114  is rotatably coupled to a shaft  115  of the housing  111  to rotate with respect to the shaft  115  corresponding to a rotation axis. The opening and closing member  114  may include a shaft coupling portion  114   b  rotatably coupled to the shaft  115 . 
     The chamber inlet  114   a  of the opening and closing member  114  may be opened and closed by a first cover  116 . The first cover  116  may be formed to include a material having elasticity. The first cover  116  may open the chamber inlet  114   a  in a direction in which air flows into the first dust chamber  121 . On the other hand, the first cover  116  may be configured to prevent the chamber inlet  114   a  from being opened in a direction opposite to a direction in which air is introduced from the first dust chamber  121 . That is, when the cleaner  1  suctions the rubbish on the surface to be cleaned, the first cover  116  may open the chamber inlet  114   a , and at the same time, the first cover  116  may prevent the chamber inlet  114   a  from being opened to a direction to which dust is discharged from the first dust chamber  121 . Accordingly, the cleaner  1  may prevent the rubbish from scattering even when the dust collecting apparatus  100  is separated from the transfer devices  10  and  20 . 
     The first cover  116  may include a fixing portion  116   a  (refer to  FIG.  7   ) fixed to the opening and closing member  114 . When the fan motor unit  104  generates a suction force, the first cover  116  may be elastically deformed in a state in which the fixing portion  116   a  is fixed, and thus the first cover  116  may open the chamber inlet  114   a . When the fan motor unit  104  does not generate a suction force, the first cover  116  may return to a position of closing the chamber inlet  114   a  by the elastic force. 
     Alternatively, the first cover  116  may be rotatably coupled to the opening and closing member  114  and elastically biased in the direction of closing the chamber inlet  114   a.    
     The first dust chamber  121  and a second dust chamber  122  may be formed in the housing  111 . The first dust chamber  121  may collect the rubbish that is filtered out when the air introduced through the transfer devices  10  and  20  passes through a filtering device  113 . The second dust chamber  122  may collect the rubbish separated from the air by a rubbish separator  123 . The housing  111  may include a chamber housing  111   b  forming the first dust chamber  121  and the second dust chamber  122 . 
     The dust collecting apparatus  100  may include the filtering device  113  arranged inside the first dust chamber  121 . The filtering device  113  may firstly filter out the rubbish contained in the air introduced through the transfer devices  10  and  20 . The filtering device  113  may be arranged apart from an inner surface of the housing  111  by a predetermined distance. The filtering device  113  may be arranged to correspond to the circumference of the chamber housing  111   b . The filtering device  113  may be arranged in a filtering opening  121   a  formed at a portion along the circumference of the chamber housing  111   b . The rubbish filtered out by the filtering device  113  may be collected in the first dust chamber  121 . The filtering device  113  may be formed of a mesh member. 
     The air passing through the filtering device  113  may be guided to the rubbish separator  123  through a transfer channel  117  formed inside the housing  111 . The transfer channel  117  may allow the first dust chamber  121  to communicate with the rubbish separator  123 . The transfer channel  117  may be formed on the outside of the chamber housing  111   b.    
     Air passing through the transfer channel  117  may be introduced into the dust separator  123  through a cyclone opening  123   a . The rubbish contained in the introduced air is centrifuged from the air and collected in the second dust chamber  122  through a dust collecting opening  123   b , and the air may move toward a filter member  124  through an air passing opening  123   c.    
     The dust collecting apparatus  100  may include the rubbish separator  123  installed inside the housing  111  while being positioned behind the second dust chamber  122 . The rubbish separator  123  may secondly filter the air passing through the filtering device  113 . The rubbish separator  123  may include at least one cyclone. The first dust chamber  121  may filter out the rubbish in the air by using the filtering device  113 , but the second dust chamber  122  may centrifuge the rubbish from the air by using the cyclone. 
     The dust collecting apparatus  100  may include a dust guide  118  configured to guide the rubbish filtered out by the rubbish separator  123  to the second dust chamber  122 . One end of the dust guide  118  may communicate with the rubbish separator  123 , and the other end thereof may communicate with the second dust chamber  122 . The one end of the dust guide  118  may communication with the dust collecting opening  123   b  of at least one cycle of the rubbish separator  123 . The dust guide  118  may receive the rubbish, which is filtered out by the rubbish separator  123 , from one end thereof and may guide the rubbish to the second dust chamber  122  through the other end thereof. 
     The dust collecting apparatus  100  may include the filter member  124 . The filter member  124  may be arranged inside the housing  111 . The filter member  124  may thirdly filter the air passing through the rubbish separator  123 . The filter member  124  may be formed of a mesh member. The air passing through the filter member  124  may pass through a communication port  119   a  formed in a second cover  119  of the housing  111  and the discharge port  102 , sequentially and then discharged to the outside of the dust collecting apparatus  100 . 
     The filter member  124  may include a guide counterpart  124   a  formed to correspond to the guide  112  of the housing  111 . The guide  112  may be inserted into the guide counterpart  124   a  of the filter member  124 . 
     The dust collector  110  may include the second cover  119  configured to cover the open rear surface of the housing  111 . The second cover  119  may be removably mounted to the housing  111 . The second cover  119  may include the communication port  119   a  for allowing the dust collector  110  to communicate with the driver  140 . Air discharged from the dust collector  110  after passing through the filter member  124  may move to the driver  140  through the communication port  119   a . A cover sealing member  119   b  for sealing with the housing  111  may be provided at an edge of the second cover  119  facing the housing  111 . 
     When the filter member  124  needs to be replaced, a user may separate the driver  140  from the dust collector  110  and then separate the second cover  119  from the housing  111 , thereby replacing the filter member  124  arranged inside the housing  111 . 
     The rubbish remover  130  may be configured to discharge the dust collected in the dust chamber  120  to the outside of the housing  111 . The rubbish remover  130  may be provided in the dust collector  110 . The rubbish remover  130  may include a handle  131 , a link  132 , a first rubbish removal member  133 , and a second rubbish removal member  134 . 
     The handle  131  may be slidable along the outer surface of the housing  111 . The handle  131  may be formed in a shape corresponding to a portion of the outer surface of the housing  111 . The handle  131  may be arranged to be exposed to the outside of the housing  111 . A user may operate the rubbish remover  130  by sliding the handle  131 . The handle  131  may be arranged to cover at least a portion of the guide  112 . 
     The link  132  may extend along the front and rear direction. At least a portion of the link  132  may be arranged in the inside of the housing  111 . One end of the link  132  may be fixed to the handle  131 . The link  132  may be integrally formed with the handle  131 . The first rubbish removal member  133  and the second rubbish removal member  134  may be fixed to the other end of the link  132 . The link  132  may move together with the handle  131  along the front and rear direction with respect to the housing  111  when the handle  131  slides. As the link  132  moves in the front and rear direction, the first rubbish removal member  133  and the second rubbish removal member  134  may slide in the inside of the housing  111 . 
     The link  132  may include a link fixing portion  132   a  fixed to the handle  131 . The link fixing portion  132   a  may extend along the left and right direction. That is, the link  132  may include a portion extending in the front and rear direction and the link fixing portion  132   a  extending in the left and right direction. The link  132  may be provided in an approximately ‘L’ shape. 
     The movement of the link  132  may be guided by the guide  112  of the housing  111 . A portion of the link  132  extending in the front and rear direction and a portion of the link fixing portion  132   a  may be slidably inserted into the guide  112 . At least a portion of the link  132  may be slidably inserted into the guide  112 . One portion of the link  132  may be arranged on the outside of the housing  111 , and the other portion thereof may be arranged in the inside of the housing  111 . A portion of the link  132  in the side connected to the handle  131  may be arranged on the outside of the housing  111 , and a portion of the link  132  in the side in which the first rubbish removal member  133  and the second rubbish removal member  134  are provided may be arranged in the inside of the housing  111 . 
     The rubbish remover  130  may include a link sealing member  135  arranged at a portion where the link  132  is inserted into the chamber housing  111   b . In order to prevent the loss of the suction force generated in the inside of the housing  111  by the fan motor unit  104 , the link sealing member  135  may be arranged at a portion where the inside and the outside of the housing  111  communicate with each other. 
     Particularly, the guide  112  may form a sliding space  112   a  recessed inward from the outer surface of the housing  111  to allow the link  132  to slide. Accordingly, at least a portion of the link  132  may be arranged in the sliding space  112   a  of the guide  112  formed on the outside of the housing  111 . In order to transmit the moving force of the handle  131  to the first rubbish removal member  133  and the second rubbish removal member  134 , the link  132  may extend from the handle  131  to the first rubbish removal member  133  and the second rubbish removal member  134 , which are arranged in the inside of the chamber housing  111   b , through the sliding space  112   a . Accordingly, a communication portion in which the link  132  is inserted into the chamber housing  111   b  is generated in the housing  111 , and the communication portion is formed to allow the inside to communicate with the outside of the housing  111 . In this case, because suction force generated inside the dust collecting apparatus  100  may be lost, the dust collecting apparatus  100  may include the link sealing member  135  arranged on a portion in which the link  132  passes through the chamber housing  111   b  to seal a portion in which the inside of the housing  111  communicates with the outside of the housing  111 . By using the link sealing member  135 , the dust collecting apparatus  100  may prevent the suction force from being lost. 
     The first rubbish removal member  133  may be arranged at one end of the link  132 . The first rubbish removal member  133  may be formed to include a material having elasticity. The first rubbish removal member  133  may include a first contact portion  133   a  protruding toward the inner wall of the chamber housing  111   b . The first contact portion  133   a  may be formed to include a material having elasticity. The first contact portion  133   a  may be formed to include a flexible material. The first contact portion  133   a  may be in close contact with the inner wall of the filtering device  113 . 
     The first rubbish removal member  133  may be provided to be in close contact with one surface of the filtering device  113  on which the filtered out rubbish is placed. As the handle  131  slides with respect to the housing  111  and the link  132  moves along the front and rear direction, the first rubbish removal member  133  slides in a state of being in close contact with the inner surface of the filtering device  113 . Based on the sliding movement of the handle  131  along the housing  111 , the first rubbish removal member  133  may remove rubbish such as hair tangled to the inner surface of the filtering device  113  by scratching the inner surface of the filtering device  113 . 
     The first rubbish removal member  133  may move from a first position between the filtering device  113  and the second dust chamber  122  as illustrated in  FIGS.  4  and  5   , to a second position protruding to the outside of the housing  111  as illustrated in  FIG.  6   . The first position may correspond to a position between the first dust chamber  121  and the second dust chamber  122 . Accordingly, the first rubbish removal member  133  may discharge the rubbish placed in the first dust chamber  121  to the outside. In addition, as the first rubbish removal member  133  protrudes to the outside of the housing  111 , dust collected in the second dust chamber  122  may also be discharged to the outside. 
     The second rubbish removal member  134  may be fixed to a portion of the link  132 . The second rubbish removal member  134  may be spaced apart from the first rubbish removal member  133  in the rear side by a predetermined distance. The second rubbish removal member  134  may be provided to form the second dust chamber  122  together with the first rubbish removal member  133  and the chamber housing  111   b.    
     The second rubbish removal member  134  may be formed to include a material having elasticity. The second rubbish removal member  134  may be provided to slide in close contact with the chamber housing  111   b  when the handle  131  slides with respect to the housing  111 . The second rubbish removal member  134  may be provided to slide in the inner surface of the chamber housing  111   b . When the handle  131  slides with respect to the housing  111 , the second rubbish removal member  134  may slide in the inner surface of the chamber housing  111   b  and the inner surface of the filtering device  113  and then transfer rubbish placed in the second dust chamber  122  to the outside of the housing  111 . 
     The second rubbish removal member  134  may include a second contact portion  134   a  protruding toward the inner wall of the chamber housing  111   b . The second contact portion  134   a  may be formed to include a material having elasticity. The second contact portion  134   a  may include a flexible material. The second contact portion  134   a  may be in close contact with the inner wall of the chamber housing  111   b.    
     The second rubbish removal member  134  may include a chamber opening  134   b  formed to allow the second dust chamber  122  to communicate with the dust guide  118 . The rubbish separated from the rubbish separator  123  may be moved to the dust guide  118 , and the dust guide  118  may guide the rubbish to the second dust chamber  122  through the chamber opening  134   b.    
     According to the above-described configuration, when the cleaner  1  according to an embodiment of the disclosure performs the cleaning operation, the air containing the rubbish introduced from the suction head  10  may be firstly filtered by the filtering device  113  of the first dust chamber  121 . Thereafter, the air moved to the rubbish separator  123  through the transfer channel  117  may be secondly filtered by the rubbish separator  123  and then collected in the second dust chamber  122 . The air passing through the rubbish separator  123  may pass through the air passing opening  123   c  and thirdly filtered by the filter member  124  and then the filtered air may be discharged to the outside through the discharge port  102 . 
       FIG.  7    is a view illustrating a state in which the dust collecting apparatus of the cleaner of  FIG.  4    collects dust according to an embodiment of the disclosure. 
       FIG.  8    is a cross-sectional view of the dust collecting apparatus of  FIG.  6    according to an embodiment of the disclosure. 
     The driving of the cleaner  1  will be described in detail with reference to  FIGS.  7  and  8   . 
     Referring to  FIG.  7   , when the cleaner  1  performs the cleaning operation, the fan motor unit  104  may generate a suction force inside the cleaner  1 . As the suction force is generated, air containing rubbish on the surface to be cleaned is moved to the dust collecting apparatus  100  through the transfer devices  10  and  20 . 
     When the suction force is generated in the inside of the cleaner  1 , the first cover  116  may open the chamber inlet  114   a . Air containing the rubbish is introduced into the first dust chamber  121  through the chamber inlet  114   a . The air containing the rubbish in the first dust chamber  121  may be firstly filtered by the filtering device  113 . The rubbish filtered out by the filtering device  113  is collected in the first dust chamber  121 . The air, which contains the rubbish and passes through the filtering device  113 , is moved to the transfer channel  117 . 
     The air passing through the transfer channel  117  flows into the rubbish separator  123  through the cyclone opening  123   a . The air containing the rubbish may be secondly filtered by a cyclone method in the rubbish separator  123 . The rubbish separated by the rubbish separator  123  is collected in the second dust chamber  122  through the dust guide  118 . The air passing through the rubbish separator  123  may be moved toward the filter member  124  through the air passing opening  123   c.    
     The air, which contains the rubbish and passes through the rubbish separator  123 , passes through the filter member  124 . The air thirdly filtered by the filter member  124  passes through the communication port  119   a  of the second cover  119 , and then is discharged to the outside of the dust collecting apparatus  100  through the discharge port  102 . 
     Because the cleaner  1  according to an embodiment of the disclosure filters the air containing the rubbish three times using the mentioned above configuration, it is possible to increase the cleaning efficiency. 
     Referring to  FIG.  8   , when the cleaner  1  finishes the cleaning operation and it is required to discharge the rubbish collected in the dust chamber  120 , the dust collecting apparatus  100  may be separated from the transfer devices  10  and  20 . In addition, the connection port  106  may be separated from the housing  111  of the dust collector  110 . A user may move the handle  131  forward. As the handle  131  slides forward along the housing  111 , the link  132  moves forward. 
     As the link  132  is guided by the guide  112  and moves forward, the first rubbish removal member  133  and the second rubbish removal member  134  arranged at the end of the link  132  may slide forward in a state of being in close contact with the inner surface of the chamber housing  111   b  and/or the filtering device  113 . 
     The first rubbish removal member  133  slides in the inner surface of the filtering device  113  and separates the rubbish placed in the filtering device  113  from the filtering device  113 , thereby discharging the rubbish to the outside of the first dust chamber  121 . To this end, the first rubbish removal member  133  may move to a position protruding to the outside of the housing  111 . 
     In this case, the opening and closing member  114  may open the first dust chamber  121  by being pressed by the first rubbish removal member  133 . The opening and closing member  114  may be elastically biased in a direction of closing the first dust chamber  121  by an elastic member (not shown). 
     While sliding in close contact with the chamber housing  111   b  and the filtering device  113 , the second rubbish removal member  134  may push the rubbish collected in the second dust chamber  122  to the outside of the housing  111 . Because the second rubbish removal member  134  slides in close contact with the inner surface of the filtering device  113 , the second rubbish removal member  134  may secondly process the rubbish tangled on the inner surface of the filtering device  113 . 
     According to this configuration, the cleaner  1  according to an embodiment of the disclosure may easily discharge the rubbish of the dust collecting apparatus  100  by a simple operation. In addition, by using the opening and closing member  114 , it is possible to prevent the rubbish from scattering even when the dust collecting apparatus  100  is separated from the transfer devices  10  and  20 . 
     In addition, because the cleaner  1  according to an embodiment of the disclosure may minimize the exposure of the remaining rubbish to the user when the dust chamber  120  is emptied, cleanliness in use may be improved. That is, as for the cleaner  1  according to an embodiment of the disclosure, the handle  131  is a component that is exposed to the user among the components of the rubbish remover  130 , and the handle  131  is connected to the first and second rubbish removal members  133  and  134  through the link  132  that is inserted into the guide  112  so as not to be exposed to a user. Therefore, although the link  132  and first and second rubbish removal members  133  and  134  are contaminated upon discharging the rubbish, it is not exposed to the user and thus the cleanliness in use may be improved. 
     In addition, when the filter member  124  needs to be replaced, the user separates the driver  140  of the dust collecting apparatus  100  from the dust collector  110  and opens the second cover  119  to open the interior of the housing  111 . Therefore, the use may easily replace the filter member  124  arranged in the inside of the housing  111 . 
       FIG.  9    is a perspective view of a cleaner according to an embodiment of the disclosure. 
       FIG.  10    is an exploded view illustrating the cleaner of  FIG.  9    according to an embodiment of the disclosure. 
       FIG.  11    is a cross-sectional view of the cleaner of  FIG.  9    according to an embodiment of the disclosure. 
     Referring to  FIGS.  9  to  11   , the cleaner  2  may include a suction head  30  configured to suction rubbish such as hair on a surface to be cleaned by a suction force of air, a dust collecting apparatus  210  configured to collect the rubbish suctioned through the suction head  30 , and an extension member  230  slidably coupled to the dust collecting apparatus  210 . 
     The suction head  30  may suction rubbish such as dust on the surface to be cleaned while traveling on the surface to be cleaned. The suction head  30  may include a head assembly  31 , a neck  32 , and a head switch  33 . 
     An air flow path may be formed in the head assembly  31 . The air flow path formed inside the head assembly  31  may communicate with the dust collecting apparatus  210  through the neck  32 . External air and rubbish introduced through the head assembly  31  may move to the dust collecting apparatus  210  through the neck  32 . 
     The neck  32  may be connected to a lower end of the dust collecting apparatus  210 . The neck  32  may be rotatably coupled to the head assembly  31 . As the neck  32  rotates with respect to the head assembly  31 , the head assembly  31  may rotate with respect to the dust collecting apparatus  210  connected to the neck  32 . Accordingly, the degree of freedom of driving of the cleaner  2  may be improved. 
     The head switch  33  is configured to maintain or release the engagement between the suction head  30  and the dust collecting apparatus  210 . The head switch  33  may press a portion of the dust collecting apparatus  210  coupled to the neck  32  to fix the position of the dust collecting apparatus  210  with respect to the suction head  30 . When a user intends to separate the dust collecting apparatus  210  from the suction head  30 , the user operates the head switch  33  to release the dust collecting apparatus  210  and then separates the dust collecting apparatus  210  from the suction head  30 . Because the head switch  33  is arranged on the suction head  30 , the user can separate the dust collecting apparatus  210  from the suction head  30  by pressing the head switch  33  with the foot without bending over. 
     One end of the dust collecting apparatus  210  may be mounted to the suction head  30 . The dust collecting apparatus  210  may include an outer case  211  and an inner case  212  arranged inside the outer case  211 . 
     The dust collecting apparatus  210  may include a discharge port  216 . The discharge port  216  may include a plurality of discharge holes. The discharge port  216  may discharge the filtered air. The discharge port  216  may be arranged on the rear surface of the dust collecting apparatus  210 . The discharge port  216  may be formed at a portion of the rear surface of the outer case  211  corresponding to the position of a fan motor unit  240  when an opening and closing device  260  closes the first dust chamber  210   a . Accordingly, the cleaner  2  according to another embodiment of the disclosure may prevent the filtered air from being discharged toward the user. However, the position of the discharge port  216  is not limited thereto, and may be located at any position as long as it can prevent the filtered air from being exposed to the user. 
     The dust collecting apparatus  210  may further include a button device  217  configured to fix the position of an extension member  230  with respect to the dust collecting apparatus  210 . The button device  217  may fix or release the position of the extension member  230 . 
     The extension member  230  may be slidably coupled to the dust collecting apparatus  210 . The extension member  230  may be slidably coupled to the inner case  212  of the dust collecting apparatus  210 . The extension member  230  may form a part of the appearance of the cleaner  2 . The extension member  230  may include an extension case  231 . 
     The extension case  231  may include a battery mounting portion  236 . A battery unit  203  may be mounted to the battery mounting portion  236 . The battery unit  203  may include at least one battery  203   a . The battery mounting portion  236  may be covered by an extension cover  232 . 
     The extension member  230  may include a handle  233  gripped by a user. The handle  233  may be arranged at an upper portion of the cleaner  2  to facilitate the user gripping. The handle  233  may be positioned at the other end opposite to one end in which the opening and closing device  260  is arranged. When a user uses the cleaner  2 , the user may push or pull the suction head  30  by gripping the handle  233 . The handle  233  may be formed in such a way that a case handle portion  231   a  formed in the extension case  231  is coupled to a cover handle portion  232   a  formed in the extension cover  232 . 
     The extension member  230  may include an operation switch  234  for controlling whether to operate the cleaner  2 . The operation switch  234  is configured to receive a user intension regarding the operation of the cleaner  2 . The operation switch  234  may be adjacent to the handle  233  so that a user operates the operation switch  234  while moving the cleaner  2  in the cleaning operation. 
     The extension member  230  may include the fan motor unit  240  configured to generate a suction force required to suction the rubbish on the surface to be cleaned. The fan motor unit  240  may be configured to suction the outside air through the suction head  30  and discharge the suctioned air to the discharge port  216 . The fan motor unit  240  may be arranged inside the outer case  211  while being mounted to the extension member  230 . 
       FIG.  12    is an enlarged view of a portion B of  FIG.  11    according to an embodiment of the disclosure. 
       FIG.  13    is an enlarged view of a portion C of  FIG.  11    according to an embodiment of the disclosure. 
     Referring to  FIGS.  12  and  13   , the dust collecting apparatus  210  and the extension member  230  will be described in details. 
     The dust collecting apparatus  210  may include the first dust chamber  210   a  and a second dust chamber  219  positioned downstream of the first dust chamber  210   a  along a direction in which air introduced from the suction head  30  is discharged through the discharge port  216 . 
     The outer case  211  of the dust collecting apparatus  210  may form a portion of the appearance of the cleaner  2 . Together with the inner case  212 , the outer case  211  may form a case flow path  210   b . The case flow path  210   b  may guide the air, which passes through the first dust chamber  210   a , to the second dust chamber  219 . 
     The inner case  212  may be arranged inside the outer case  211 . The first dust chamber  210   a  may be formed inside the inner case  212 . A filtering device  213  may be arranged inside the inner case  212 . The first dust chamber  210   a  may collect the rubbish that is filtered out when the air introduced through the suction head  30  passes through the filtering device  213 . 
     The filtering device  213  may firstly filter out the rubbish contained in the air introduced through the suction head  30 . The filtering device  213  may extend along a portion of the inner surface of the inner case  212 . The rubbish filtered out by the filtering device  213  may be collected in the first dust chamber  210   a . The filtering device  213  may be formed of a mesh member. 
     The inner case  212  may include a first case opening  212   a  through which air passing through the filtering device  213  moves to the case flow path  210   b . The filtering device  213  may be arranged to cover a portion of the inner case  212  in which the first case opening  212   a  is formed. 
     The inner case  212  may include a second case opening  212   b  through which air guided by the case flow path  210   b  flows into a rubbish separator  251 . 
     The air introduced into the rubbish separator  251  through the second case opening  212   b  may be secondly filtered by the rubbish separator  251 . The rubbish filtered out by the rubbish separator  251  may be collected in the second dust chamber  219 . The air filtered by the rubbish separator  251  may move toward the fan motor unit  240 . 
     The extension member  230  may include the opening and closing device  260  configured to open and close the first dust chamber  210   a . The opening and closing device  260  may be arranged at an end of the extension member  230  facing the suction head  30 . The opening and closing device  260  may interlock with a first rubbish removal member  270  and/or a second rubbish removal member  275 . Because the opening and closing device  260  interlocks with the first rubbish removal member  270  and/or the second rubbish removal member  275 , it is possible to prevent the first dust chamber  210   a  from being inadvertently opened, and thus it is possible to open the dust chambers  210   a  and  219  only when discharging the rubbish is required. The opening and closing device  260  may include an opening and closing member  261 , an opening and closing cover  262 , and an opening and closing sealing member  263 . 
     The opening and closing device  260  moves in a direction away from the dust collecting apparatus  210  to open the first dust chamber  210   a  when the first rubbish removal member  270  is slidably moved out of the first dust chamber  210   a . The opening and closing device  260  moves in a direction close to the dust collecting apparatus  210  to close the first dust chamber  210   a  when the first rubbish removal member  270  is slidably moved into the first dust chamber  210   a.    
     The opening and closing member  261  may open and close the first dust chamber  210   a  based on the sliding movement of the extension member  230  with respect to the dust collecting apparatus  210 . The opening and closing member  261  may include a chamber inlet  261   a  formed to allow air introduced from the suction head  10  to flow into the first dust chamber  210   a . The chamber inlet  261   a  may be opened and closed by the opening and closing cover  262 . 
     The opening and closing cover  262  may be formed to include a material having elasticity. The opening and closing cover  262  may open the chamber inlet  261   a  in a direction in which air flows into the first dust chamber  210   a . Further, the opening and closing cover  262  may prevent the chamber inlet  261   a  from being opened in a direction opposite to a direction in which air is introduced from the first dust chamber  210   a . That is, when the cleaner  2  suctions the rubbish on the surface to be cleaned, the opening and closing cover  262  may open the chamber inlet  261   a , but at the same time, the opening and closing cover  262  may prevent the chamber inlet  261   a  from being opened to a direction to which dust is discharged from the first dust chamber  210   a . Accordingly, the cleaner  2  may prevent the rubbish from scattering when the dust collecting apparatus  210  is separated from the suction head  30 . 
     The opening and closing cover  262  may include a cover fixing portion  262   a . When the fan motor unit  240  generates a suction force, the opening and closing cover  262  may be elastically deformed while the cover fixing portion  262   a  is fixed and then the opening and closing cover  262  may open the chamber inlet  261   a . When the fan motor unit  240  does not generate the suction force, the opening and closing cover  262  may return to the position of closing the chamber inlet  261   a  by the elastic force. 
     The opening and closing sealing member  263  may be provided to seal between the dust collecting apparatus  210  and the opening and closing member  261 . The opening and closing sealing member  263  may be arranged along the edge of the opening and closing member  261 . The opening and closing sealing member  263  may be formed to include a material having elasticity. The opening and closing sealing member  263  may be formed to include a material more flexible than the opening and closing member  261 . The opening and closing sealing member  263  may be in close contact with the inner surface of the inner case  212  and may seal the first dust chamber  210   a . Accordingly, the cleaner  2  according to another embodiment of the disclosure may prevent the rubbish from leaking from the first dust chamber  210   a.    
     The extension member  230  may include the first rubbish removal member  270  configured to discharge the rubbish of the first dust chamber  210   a . The first rubbish removal member  270  may slide in the first dust chamber  210   a . The first rubbish removal member  270  may include a first mounting portion  271  and a first rubbish removal portion  272  mounted on the first mounting portion  271 . 
     The first rubbish removal portion  272  may be formed to include a material having elasticity. The first rubbish removal portion  272  may be formed to be in close contact with the inner wall of the filtering device  213 . The first rubbish removal portion  272  may be provided to be in close contact with one surface of the filtering device  213  on which the filtered out rubbish is placed. When the extension member  230  slides with respect to the dust collecting apparatus  210 , the first rubbish removal portion  272  may slide in a state of being in close contact with the inner surface of the filtering device  213 . Based on the sliding movement of the extension member  230  toward the inside of the dust collecting apparatus  210 , the first rubbish removal portion  272  may remove rubbish such as hair tangled to the inner surface of the filtering device  213  by scratching the inner surface of the filtering device  213 . 
     The first rubbish removal member  270  may move from a first position between the filtering device  213  and the rubbish separator  251 , to a second position protruding to the outside of the dust collecting apparatus  210 . Accordingly, the first rubbish removal member  270  may discharge the rubbish placed in the first dust chamber  210   a  to the outside. In addition, as the first rubbish removal member  270  protrudes to the outside of the dust collecting apparatus  210 , dust collected in the second dust chamber  219  may also be discharged to the outside. 
     The extension member  230  may include a first connection portion  269  connecting the first rubbish removal member  270  to the opening and closing device  260 . The first connection portion  269  may be arranged in the first dust chamber  210   a . The first rubbish removal member  270  and the opening and closing device  260  may interlock with each other by the first connection portion  269 . 
     A discharge opening  268  may be formed among the plurality of first connection portions  269 . The discharge opening  268  may be formed between the first rubbish removal member  270  and the opening and closing device  260 . When the opening and closing device  260  opens the first dust chamber  210   a  and the first dust removal member  270  discharges the rubbish of the first dust chamber  210   a , the rubbish may be discharged to the outside through the discharge opening  268 . 
     The extension member  230  may include the rubbish separator  251 . The rubbish separator  251  may include a cyclone. The rubbish separator  251  may centrifuge the rubbish, which is not filtered out in the first dust chamber  210   a , from air. Because the rubbish separator  251  separates the rubbish from air passing through the filtering device  213  in a different manner from the filtering device  213 , the cleaner  2  according to another embodiment of the disclosure may increase cleaning efficiency. 
     The extension member  230  may include the second rubbish removal member  275  configured to discharge the rubbish of the second dust chamber  219 . The second rubbish removal member  275  may be configured to slide in the second dust chamber  219  and the first dust chamber  210   a . The second dust chamber  219  may be formed between the first rubbish removal member  270  and the second rubbish removal member  275 . The second dust removal member  275  may include a second mounting portion  276  and a second rubbish removal portion  277  mounted on the second mounting portion  276 . 
     The second rubbish removal portion  277  may be formed to include a material having elasticity. When the extension member  230  slides with respect to the dust collecting apparatus  210 , the second rubbish removal portion  277  may slide in a state of being in close contact with the inner surface of the inner case  212  so as to discharge the rubbish of the second dust chamber  219 . Based on the sliding movement of the extension member  230  with respect to the dust collecting apparatus  210 , the second rubbish removal portion  277  may discharge all the rubbish of the second dust chamber  219  by sliding in state of being in close contact with the inner surface of the inner case  212 . 
     The extension member  230  may include a second connection portion  279  connecting the first rubbish removal member  270  to the second rubbish removal member  275 . The second connection portion  279  may be arranged in the second dust chamber  219 . The second rubbish removal member  275  and the first rubbish removal member  270  may interlock with each other by the second connection portion  279 . 
     The extension member  230  may include a rubbish guide  252  configured to guide the rubbish separated in the rubbish separator  251  to the second dust chamber  219 . The rubbish guide  252  may be provided in a cone shape in which a radius thereof is reduced toward the second dust chamber  219 . 
     The extension member  230  may include a fan motor case  241  slidably inserted into the inner case  212 . The fan motor unit  240  and a motor filter  246  may be arranged in the fan motor case  241 . 
     The motor filter  246  may be provided for filtering out rubbish contained in the air, which is before being introduced into the fan motor unit  240 , again. The motor filter  246  may be arranged in front of the fan motor unit  240  in a direction in which air passing through the rubbish separator  251  is discharged through the discharge port  216 . The motor filter  246  may be arranged between the fan motor unit  240  and the rubbish separator  251 . The motor filter  246  may filter out the rubbish contained in the air passing through the rubbish separator  251 . The motor filter  246  may be formed of a mesh member. The motor filter  246  may be arranged inside the outer case  211  while being mounted on the extension member  230 . By using the motor filter  246 , the cleaner  2  according to another embodiment of the disclosure may prevent the fan motor unit  240  from being damaged by the rubbish and thus the cleaner  2  may discharge relatively clean air through the discharge port  216 . 
     The fan motor unit  240  may be configured to supply a suction force to the first dust chamber  210   a  and the second dust chamber  219 . The air passing through the motor filter  246  may move to a discharge member  242  after passing through the fan motor unit  240 . The fan motor unit  240  may be arranged closer to the opening and closing device  260  than the handle  233 . The fan motor unit  240  may be arranged at a relatively lower side of the extension member  230 . As for the cleaner  2  according to another embodiment of the disclosure, the fan motor unit  240  that is relatively heavy than the battery  203   a  may be positioned below the battery  203   a , and thus the center of gravity may be positioned relatively downward. Accordingly, the cleaner  2  according to another embodiment of the disclosure may have a relatively lower center of gravity and thus the convenience of use may be increased. 
     The discharge member  242  may be provided to communicate with the discharge port  216 . Air introduced into the discharge member  242  through the fan motor unit  240  may be guided to the discharge port  216  by the discharge member  242 . 
     The cleaner  2  according to another embodiment of the disclosure may be provided such that the inside of the fan motor case  241  of the extension member  230  in which the fan motor unit  240  is arranged is separated from the battery mounting portion  236 . That is, the air flowing by the fan motor unit  240  is immediately discharged through the discharge port  216  without moving to the battery mounting portion  236  and the handle  233 . Accordingly, the cleaner  2  according to another embodiment of the disclosure may minimize the amount of air discharged toward the user. 
     According to the above-described configuration, when the cleaner  2  according to another embodiment of the disclosure performs the cleaning operation, the air containing the rubbish introduced from the suction head  30  may be firstly filtered by the filtering device  213  of the first dust chamber  210   a . Thereafter, the air moved to the dust/rubbish separator  251  through the case flow path  210   b  may be secondly filtered. The air filtered by the dust/rubbish separator  251  may be collected in the second dust chamber  219 . The air passing through the dust/rubbish separator  251  may be thirdly filtered by passing through the motor filter  246  and then the filtered air may pass through the fan motor unit  240 . The air passing through the fan motor unit  240  may be discharged to the discharge port  216  through the discharge member  242 . 
       FIG.  14    is a view illustrating a state in which dust of the dust collecting apparatus of the cleaner of  FIG.  1    is discharged according to an embodiment of the disclosure. 
       FIG.  15    is a cross-sectional view of a portion of the cleaner of  FIG.  14    according to an embodiment of the disclosure. 
       FIG.  16    is a cross-sectional view of a button device of the cleaner of in  FIG.  14    according to an embodiment of the disclosure. 
     Referring to  FIGS.  14  and  15   , when a user intends to discharge dust collected in the dust collecting apparatus  210  after finishing the cleaning operation, the user may slide the extension member  230  with respect to the dust collecting apparatus  210  by applying a force to the extension member  230 . In this case, the user may move the button  218  for moving the extension member  230 . 
     Referring to  FIGS.  13  to  16   , the button device  217  may include a button  218 , a fixing member  221  and an elastic member  220 . 
     The button  218  may be arranged on an outer wall of the dust collecting apparatus  210 . The button  218  may be located at the rear surface of the dust collecting apparatus  210 . The button  218  may be configured to be movable with respect to the dust collecting apparatus  210 . When a user intends to remove dust inside the dust collecting apparatus  210  by sliding the extension member  230  with respect to the dust collecting apparatus  210 , the user may press and move the button  218 . The button  218  may include a pressing portion  218   a  configured to press the fixing member  221  to allow the fixing member  221  to be inserted into an insertion groove  231   b  of the extension case  231  of the extension member  230 . 
     The button  218  may be elastically biased to a position for pressing the fixing member  221  by the elastic member  220 . Therefore, after the dust inside the dust collecting apparatus  210  is discharged, the extension member  230  may slide in the direction to be moved out with respect to the dust collecting apparatus  210  and thus the fixing member  221  is inserted into the insertion groove  231   b  again. In this case, the button  218  may return to its original position by the elastic member  220 . 
     The fixing member  221  may fix the extension member  230  to the dust collecting apparatus  210  or release the fixation between the extension member  230  and the dust collecting apparatus  210  according to the movement of the button  218 . The fixing member  221  may be insertable into the insertion groove  231   b  of the extension case  231 . 
     The elastic member  220  may elastically bias the button  218  to a fixed position to fix the extension member  230  to the dust collecting apparatus  210 . One end of the elastic member  220  may be fixed to a button fixing portion  211   a  of the outer case  211 , and the other end thereof may be fixed to the button  218 . 
     According to the movement of the button  218 , a space, in which the fixing member  221  moves, is formed in the button  218 . In this state, when a user applies a force to the extension member  230 , the fixing member  221  is separated from the insertion groove  231   b  and moves toward the button  218 . As a result, the extension member  230  may slide into the dust collecting apparatus  210 . 
     When the extending member  230  slides inside the dust collecting apparatus  210 , the opening and closing device  260  arranged at one end of the extending member  230  opens the first dust chamber  210   a , the first rubbish removal member  270  slides in one surface on which the rubbish of the filtering device  213  is placed, and the second rubbish removal member  275  slides in the inner surface of the second dust chamber  219  and one surface of the filtering device  213  in which the rubbish is placed. The first rubbish removal member  270  may separate the rubbish placed in the filtering device  213  and discharge the rubbish to the outside of the first dust chamber  210   a . The second rubbish removal member  275  discharges the rubbish of the second dust chamber  219  to the outside and at the same time the second rubbish removal member  275  may secondly separate the rubbish placed in the filtering device  213  and discharge the separated rubbish to the outside of the first dust chamber  210   a.    
     To this end, the first rubbish removal member  270  and the second rubbish removal member  275  may move to a position protruding to the outside of the dust collecting apparatus  210 . Further, the extension member  230  may move to expose only the opening and closing device  260  to the outside of the dust collecting apparatus  210  without exposing the first rubbish removal member  270  and the second rubbish removal member  275  to the outside of the dust collecting apparatus  210 . Alternatively, the extension member  230  may move to expose only the opening and closing device  260  and the first rubbish removal member  270  to the outside of the dust collecting apparatus  210  without exposing the second rubbish removal member  275  to the outside of the dust collecting apparatus  210 . 
     When discharging of the dust in the dust chamber  210   a  and  219  is completed, a user can move the extension member  230  in the direction to be moved out from the dust collecting apparatus  210 . Accordingly, the opening and closing device  260  moves to a position for closing the first dust chamber  210   a . In addition, the button  218  is moved by the elastic member  220  and presses the fixing member  221  to be inserted into the insertion groove  231   b . Therefore, the position of the extension member  230  with respect to the dust collecting apparatus  210  is fixed. 
     According to this configuration, the cleaner  2  according to another embodiment of the disclosure may easily discharge the rubbish of the dust collecting apparatus  210  through a relatively simple operation. In addition, because the opening and closing device  260  is configured to open and close the dust chambers  210   a  and  219  only when the dust of the dust collecting apparatus  210  is discharged, it is possible to prevent the rubbish from scattering even when the dust collecting apparatus  210  is separated from the suction head  30 . 
     As is apparent from the above description, because the cleaner slides the handle with respect to the dust collecting apparatus, the rubbish removal member connected to the handle may separate the rubbish attached to one side of the filtering device and thus the cleaner may easily discharge the rubbish collected in the dust collecting apparatus. 
     Further, the dust chamber is opened when the dust removal member protrudes out of the dust collecting apparatus by sliding the handle after separating the dust collecting apparatus from the transfer device. Therefore, it is possible to prevent the rubbish from scattering when emptying the dust chamber. 
     Because only the handle for sliding the rubbish removal member is exposed to the outside of the dust collecting apparatus, the cleaner may prevent the remaining rubbish from being exposed to the user, which may occur due to the sliding movement of the rubbish removal member. 
     The size of the cleaner may be reduced because the cleaner has a relatively simple configuration and a portion of the link is positioned inside the housing. 
     The cleaner may have a relatively lower center of gravity and thus convenience of use may be improved. 
     Because the opening and closing member for opening and closing the dust chamber is operated together with the rubbish removal member, the cleaner may prevent the dust chamber from being inadvertently opened. 
     While the disclosure has been shown and described with reference to various embodiments thereof, it would be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents.