| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a bath type motor-driven toothbrush, wherein the rotation number of a motor shaft is matched with the reciprocating vibration frequency of a brush. <P>SOLUTION: A motor 2 inside a cylindrical case 1 and a reciprocating shaft 5 slidably passing through the distal end of the case are connected by a motion conversion means 3 for converting one rotation of the motor shaft 21 to one reciprocating swing of a swing body 4 by a scotch yoke mechanism 40 and converting one reciprocating swing of the swing body 4 to one reciprocating motion in a straight direction of the reciprocating shaft 5 further. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
