| 摘要 |
PCT No. PCT/JP80/00098 Sec. 371 Date Mar. 14, 1981 Sec. 102(e) Date Mar. 12, 1981 PCT Filed May 9, 1980 PCT Pub. No. WO81/00288 PCT Pub. Date Feb. 5, 1981.A pump driving mechanism of this applications is formed by supporting a piston body 3 provided with a piston rod 9 and an elastic arm 18 movable in directions vertical to reciprocally moving directions of the piston body, between respective free ends of a pair of elastic leg pieces 16 and 17 fixed at one end and freed at the other end, and connecting an eccentric shaft 23 driven to be rotated by a motor 22 to a shaft bearing 21 formed at a free end of the elastic arm 18, whereby a low noise reciprocating movement within a cylinder 14 is provided to a piston rod 9 by rotations of the eccentric shaft 23.
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