| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a fixed structure of an eccentric rod and a vibration generator, capable of reducing noise generated by vibration when run at high as well as at low rotation speeds. <P>SOLUTION: An electric toothbrush as the vibration generator is provided with a case 10, a motor 20, an eccentric rod 30A, a stem 40, and an oral hygiene member. The eccentric rod 30A has an eccentric weight portion 33 and a rod portion 34 connected to a drive shaft 21 of the motor 20. An angleθbetween the first central axis 33t of the eccentric weight portion 33 and an extension line 34s, defined by extending the second central axis 34t of the rod portion 34 towards the eccentric weight portion 33, is greater than 0°and equal to or less than approximately 10°in a state in which one end 31 of the eccentric rod 30A is not inserted into a shaft receiving portion 44. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
