| CPC A61M 5/14216 (2013.01) [F04B 17/04 (2013.01)] | 6 Claims |
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1. A liquid infusion device comprising:
a solenoid (130) that generates magnetic force when powered;
a first movable body (140) equipped with a magnet that performs a reciprocating motion driven by the magnetic force of the solenoid;
a second movable body (150), which is spaced a predetermined distance from the first movable body and arranged in parallel, performing a reciprocating motion in conjunction with the reciprocating motion of the first movable body;
a lever (160), having one end coupled to the top of the first movable body and the other end coupled to the second movable body, with a pivot axis positioned at a specific point between both ends,
a steel plate (180) configured to interact with the magnet of the first movable body through magnetic attractive force;
a reservoir (230) that stores liquid; and
a piston-check valve module (250) that receives the liquid from the reservoir and discharges the liquid out of the piston-check valve module, the piston-check valve module including a piston that is connected to the second movable body, the piston performing a reciprocating motion in conjunction with the reciprocating motion of the second movable body;
wherein the reciprocating first movable body moves between a first point, where it is closest to the solenoid, and a second point, where it is farthest from the solenoid, and
when no power is supplied to the solenoid, the magnetic attractive force between the magnet and the steel plate causes the first movable body to move to either the first or second point and remain fixed there.
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