Syringe plunger locking mechanism

摘要

An injection system comprising:
a syringe body (750);
a syringe plunger;
an actuating shaft (754);
a releasable connection mechanism adapted to make a releasable connection with the actuating shaft and the syringe plunger, the releasable connection comprising:
a ferrous metal member (756,758) disposed on one of the syringe plunger and the actuating shaft; and
a permanent magnet (756,758) disposed on the other one of the syringe plunger and the actuating shaft;

wherein the syringe plunger is in an engaged position with the actuating shaft when the permanent magnet is magnetically attached to the ferrous metal member.