Solenoid having non-rotating plunger

摘要

An electromagnetic solenoid incorporating a plunger return mechanism comprising a spring retainer non-rotatably fitted to the plunger, and a spring held in compression between the retainer and a coil wound bobbin disposed about the plunger. The spring is held non-rotatable with respect to the bobbin and the plunger, and the plunger is non-rotatable with respect to the bobbin so that the spring cannot unwind with respect to the spring retainer.