| 摘要 |
PURPOSE:To simplify the structure by a method wherein a permanent magnet is arranged at one side of a solenoid to make a conventional pull-back spring unnecessary, in the pump in which the pump section thereof is driven by the motion of an electromagnetic plunger driven by the solenoid. CONSTITUTION:The pump consists of the pump section 14 equipped with an inlet 10 and an outlet 11 provided with non-return valves 12, 13 respectively, and an electromagnetic driving section 15 connected therewith, while the pump section 14 discharges a fluid sucked into a pump chamber 16 by the reciprocating motion of a bellows member 28 from the outlet 11. The electromagnetic driving section 15 is equipped with a housing 21 constituted by connecting left and right end frames 22, 23 and a centra tubular frame 24 integrally through bolts 25, while the solenoid 29 is arranged in the housing 21 and the electromagnetic plunger 27 is arranged in the central hole of the solenoid. A permanent magnet 35 is arranged i neighboring to a solenoid 29 and a yoke 31 thereof is used commonly with one yoke of the solenoid 29. |
