Dust collecting device and an electric vacuum cleaner with it

A dust collecting device, wherein, the dust collecting device comprises a main body with an opening, a first dust collector with a first dust collecting brush for collecting dust, and a second dust collector with a second dust collecting brush for collecting dust;

• the first dust collector and the second dust collector are rotatably held in parallel inside the main body;
• the opening is arranged at outer peripheral surface of the main body;
• the first dust collecting brush is arranged at outer peripheral surface of the first dust collector;
• the second dust collecting brush is arranged at outer peripheral surface of the second dust collector;
• one part of the first dust collector is arranged at the opening so as to exposed from the main body;
• one part of the second dust collector is arranged at the opening so as to exposed from the main body;
• the first dust collecting brush and the second dust collecting brush are alternately moved in and out from the opening;
• when the first dust collecting brush is at the opening, the first dust collecting brush is inclined toward the second dust collector;
• when the second dust collecting brush is at the opening, the second dust collecting brush is inclined toward the first dust collector;
• the cylindrical first dust collector and the second dust collector move in contact with each other on a surface to be cleaned, and the first dust collector and the second dust collector pivot in the same direction due to a frictional force with the surface to be cleaned;
• the first dust collector further comprises a first pivoting shaft with a first gear provided at the end;
• the second dust collector further comprises a second pivoting shaft with a second gear provided at the end;
• the first gear and the second gear are connected by a third gear;
• a brush tip of the first dust collecting brush and a brush tip of the second dust collecting brush are configured so that a part of the brush tip of the first dust collecting brush and a part of the brush tip of the second dust collecting brush come into contact with each other.