| 摘要 |
PROBLEM TO BE SOLVED: To satisfy both the strength and the elastic effect of a lever to drive massage ball, prevent the strength of a chassis from being reduced, and improve the assembly workability. SOLUTION: A massage ball 33 is provided on each free end of a pair of levers 31, 31 which are symmetrically tilted with respect to a surface orthogonal to the axis on a rotary shaft 5 for massage and turnably supported, the levers 31 are formed of a steel plate, and a portion between the support part to the rotary shaft for massage and the free end is bent 31a so that the clearance between a pair of levers 31, 31 is larger at the free end than the clearance at the support part to the rotary shaft 5 for massage. The bent part is provided on the position projecting from an opening 23a provided in a chassis 23 of the lever 31.
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