| 摘要 |
PROBLEM TO BE SOLVED: To avoid situations which are likely to make noises by reducing in occurrences of sounds caused by a vibrating power from a piston crank mechanism. SOLUTION: A mouth washer comprises a gear body 302 rotating by engaging in a driving gear 301, a cylindrical cam 303 mounted on the gear body 302 with eccentricity to a rotation center 302a of the gear body 302, a connecting rod 304 attached to the cam 303 of the gear body 302 and a piston 305 attached to a tip of the connecting rod 304. The gear body 302 is provided with a balance weight 306 at the position on the other side to the eccentric direction of the cam 303 against the rotation center 302a. COPYRIGHT: (C)2004,JPO
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