Cleaner

Abstract

A cleaner includes a rotation prevention assembly which selectively fixes a first rotation member that rotates the body about a first rotational axis and a second rotation member that rotates the body about a second rotational axis. The rotation prevention assembly includes: a catching groove in the first rotation member; and a fixing member rotatably coupled to the second rotation member and inserted into the catching groove. The fixing member extends in the direction of gravity and freely rotates. When the angle between the second rotational axis and the ground is greater than a predetermined angle, the fixing member is caught by the catching groove, preventing rolling, and yawing allows the cleaner to be operated. When the angle between the second rotational axis and the ground is less than a predetermined angle, the fixing member is not inserted into and caught by the catching groove, and rolling prioritizes over yawing.

1 . A cleaner comprising:
 a cleaning module which sucks outside air;   a body which provides a suction force to the cleaning module;   a first rotation member which is disposed between the cleaning module and the body and rotates the body about a first rotational axis disposed in one direction;   a second rotation member which is disposed between the first rotation member and the body and rotates the body about a second rotational axis in a direction intersecting the first rotational axis; and   a rotation prevention assembly which selectively fixes the first rotation member and the second rotation member,   wherein the rotation prevention assembly includes:
 a catching groove formed in the first rotation member; and 
 a fixing member which is rotatably coupled to the second rotation member, extends in the direction of gravity, has a portion thereof that is inserted into the catching groove when an angle between the second rotational axis and the ground is a first angle, and is not inserted into the catching groove when the angle between the second rotational axis and the ground is a second angle. 
   
     
     
         2 . The cleaner of  claim 1 , wherein the second rotational axis passes through the cleaning module and the body. 
     
     
         3 . The cleaner of  claim 1 , wherein the fixing member extends in the circumferential direction about the second rotational axis. 
     
     
         4 . The cleaner of  claim 1 ,
 wherein the rotation member includes a hollow formed therein in which an air flow path is disposed, and   wherein the catching groove is disposed on a radially outer side of the hollow.   
     
     
         5 . The cleaner of  claim 1 , wherein the rotation prevention assembly includes:
 a stopper which is disposed on the second rotation member; and   a catching protrusion which is disposed on the first rotation member and by which the stopper is caught when the second rotation member is rotated up to a critical angle.   
     
     
         6 . The cleaner of  claim 5 , wherein the stopper is disposed on the fixing member and extends in a direction intersecting an extension direction of the fixing member. 
     
     
         7 . The cleaner of  claim 1 , further comprising a third rotation member of which the front is rotatably coupled to the cleaning module and which rotates about a third rotational axis intersecting both the second rotational axis and the third rotational axis,
 wherein a front of the third rotation member is rotatably coupled to a rear of the first rotation member, and   wherein a front of the second rotation member is rotatably coupled to a rear of the third rotation member.   
     
     
         8 . The cleaner of  claim 7 ,
 wherein the first rotational axis is a pitching axis which rotates the body up and down with respect to the cleaning module,   wherein the second rotational axis is a rolling axis which rotates the body with respect to a moving direction of the cleaning module, and   wherein the third rotational axis is a yawing axis which rotates the body left and right with respect to the cleaning module.   
     
     
         9 . The cleaner of  claim 7 , wherein the rotation prevention assembly further comprises an elastic member which provides a restoring force in the opposite direction when the third rotation member rotates in one direction. 
     
     
         10 . The cleaner of  claim 9 , wherein the elastic member is a torsion spring which is fixed to the first rotation member and is disposed about the third rotational axis as the center of rotation. 
     
     
         11 . A cleaner comprising:
 a cleaning module which sucks outside air;   a rolling axis which passes through the cleaning module and is disposed to be able to pitch about a connection point with the cleaning module as a pitching axis;   a body which is disposed on the rolling axis, provides a suction force to the cleaning module, and is disposed to be able to roll about the rolling axis; and   a rotation prevention assembly which is disposed between the cleaning module and the body and selectively limits the rolling of the body,   wherein the rotation prevention assembly includes:
 a fixing member of which a length direction is disposed in the direction of gravity; and 
 a catching groove into which the fixing member is inserted when an angle between the rolling axis and the ground is greater than or equal to a predetermined angle. 
   
     
     
         12 . The cleaner of  claim 11 , wherein the fixing member is disposed to be able to rotate about a rotation axis parallel to the pitching axis. 
     
     
         13 . The cleaner of  claim 11 , comprising a yawing axis which is disposed between the pitching axis and the rolling axis and is disposed perpendicular to both the pitching axis and the rolling axis. 
     
     
         14 . The cleaner of  claim 11 , wherein the rotation prevention assembly includes:
 a catching protrusion which is disposed on a radially outer side of the rolling axis; and   a stopper which is disposed in the circumferential direction of the rolling axis from the catching protrusion and is caught by the catching protrusion.