| 摘要 |
PROBLEM TO BE SOLVED: To provide a vacuum cleaner including a suction tool capable of attaining both of weight saving and torque improvement without deteriorating the efficiency of an electric motor since, in a conventional manner, the efficiency of the electric motor is deteriorated when a housing is thinned in aiming at weight saving and a rotor is enlarged to increase mass when the deterioration of the efficiency is prevented, etc. so that it has been difficult to attain both of the weight saving and the efficiency.SOLUTION: A magnet arranged inside the housing of an electric motor and a steel plate material arranged on the outer circumference of the housing deviated by 90 degrees from a magnet arrangement position are added, so that weight saving is attained with the prevention of the deterioration of efficiency due to thinning the housing while securing a necessary magnetic circuit. |
