Vacuum cleaner

Abstract

The present disclosure relates to a cleaner including a cleaner head including a roller configured to assist the cleaner in traveling on a cleaning surface, and a roller cover configured to prevent the roller from being withdrawn from the cleaner and configured to be easily separated, such that a user may easily replace the roller capable of being disposed on a lower surface of the cleaner head and easily remove foreign substances accumulated on the roller, thereby maintaining traveling performance of the roller, preventing damage to components, and reducing maintenance costs and time required for the roller.

1 . A cleaner head comprising:
 a housing configured to define an external appearance and having a space therein;   a cleaning member disposed in the space in the housing and configured to clean a cleaning surface;   a lower cover configured to cover a lower side of the housing and having a lower surface in which a roller accommodation portion is recessed;   a roller separably coupled in the roller accommodation portion, rotatably provided, and configured to roll on the cleaning surface; and   a roller cover having a flat plate shape separably coupled to the roller accommodation portion and the roller and configured to prevent the roller from being withdrawn.   
     
     
         2 . The cleaner head of  claim 1 , wherein the roller accommodation portion comprises a cover groove recessed vertically,
 wherein the roller cover comprises:   a cover main body disposed in parallel with the lower cover; and   a cover coupling portion disposed perpendicularly to the cover main body, and   wherein the cover coupling portion is disposed at one end of the cover main body and vertically inserted into the cover groove.   
     
     
         3 . The cleaner head of  claim 2 , wherein the roller accommodation portion comprises a hook groove horizontally recessed in an inner wall of the cover groove,
 wherein the cover coupling portion comprises a cover hook protruding horizontally, and   wherein the cover hook is separably coupled to the hook groove and disposed at a position that faces the hook groove.   
     
     
         4 . The cleaner head of  claim 2 , wherein the roller comprises:
 a roller main body having a cylindrical shape; and   a roller shaft disposed to penetrate a rotation center of the roller main body, and   wherein the roller accommodation portion comprises:   a roller groove having an inner wall recessed to define a curved surface so that at least a part of the roller main body is inserted into the roller groove;   one or more roller shaft grooves each having an inner wall recessed to define a curved surface so that at least a part of the roller shaft is inserted into the roller shaft groove; and   a cover support protruding vertically and configured to support the cover main body.   
     
     
         5 . The cleaner head of  claim 4 , wherein the cover main body further comprises:
 a shaft support groove having an inner wall vertically recessed to define a curved surface so that at least a part of the roller shaft is vertically inserted into the shaft support groove; and   a cover support groove into which the cover support is vertically inserted.   
     
     
         6 . The cleaner head of  claim 5 , wherein the roller shaft and the cover support are coupled to the cover main body and block a horizontal movement of the cover main body, and
 wherein a direction in which the roller shaft blocks the horizontal movement of the cover main body and a direction in which the cover support blocks the horizontal movement of the cover main body are orthogonal to each other.   
     
     
         7 . The cleaner head of  claim 3 , wherein the roller accommodation portion further comprises a separation assisting groove recessed at a side opposite, in a horizontal direction, to a position at which the roller is disposed based on the cover coupling portion,
 wherein at least a part of the cover coupling portion is exposed to an internal space of the separation assisting groove, and   wherein the cover hook is moved horizontally and separated from the hook groove when an external force is applied in the horizontal direction to a part of the exposed cover coupling portion.   
     
     
         8 . The cleaner head of  claim 7 , wherein a first cover groove is recessed in a part of the cover coupling portion exposed toward the separation assisting groove. 
     
     
         9 . The cleaner head of  claim 7 , wherein the separation assisting groove has an inclined surface formed such that a depth thereof increases as the distance from the cover coupling portion decreases. 
     
     
         10 . The cleaner head of  claim 7 , wherein a second cover groove is recessed in a lower surface of the cover main body. 
     
     
         11 . A robot cleaner comprising:
 a housing configured to define an external appearance and having a space;   a cleaning member disposed in the space in the housing and configured to clean a cleaning surface;   a lower cover configured to cover a lower side of the housing and having a lower surface in which a roller accommodation portion is recessed;   a roller separably coupled in the roller accommodation portion, rotatably provided, and configured to roll on the cleaning surface;   a roller drive motor separably connected to the roller and configured to transmit a rotational force to the roller; and   a roller cover having a flat plate shape, separably coupled to the roller accommodation portion and the roller, and configured to prevent the roller from being withdrawn.