| 摘要 |
PURPOSE:To prevent abnormal vibration of electric blower by constructing the return path f an air-guide with high and low guides where the former is contacted tightly against the motor bracket to improve the rigidity while a gap is made for the latter. CONSTITUTION:The vibration of motor is trasmitted through a bearing 21 to the upper board 17 of motor bracket then to an air-guide 15. Here, only the high guide 22a in the air guide 15 is contacting against the upper board 17 of motor bracket in the return path 14, but since the high guide 22a is contacting tightly against said upperboard 17, the rigidity will increase thereby the vibration is hard to occur. While since the low guide 22b is separated completely from the upperboard 17 of motor bracket to provide a gap A, the vibration will never transmit. Consequently, discomfortable noise cause on the abnormal vibration can be prevented.
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