| 摘要 |
<p>The electric tooth brush consists of a case (1) with an opening for a rod (3), carrying the brush, which is joined to the motor (4) by a rotating eccentric (7). The motor is placed longitudinally and is joined to the eccentric by a coupling pinion (6) which forms a speed reducer. The opening of the case has a rounded internal edge which comes into sliding tangential contact with the cylindrical end (20) of the rod. The case has a coupling (27) and a cover (31) which are encased one in the other and are crossed by a rod (12) on which the eccentric is mounted.</p> |
