| 摘要 |
PURPOSE:To stabilize a solenoid by retaining a plunger without sliding on a coil by a constitution wherein the fitting plane of cantilever flat springs supporting yokes untouchedly to an electromagnetic coil is made to be the same plane of the supporting poing of a plunger. CONSTITUTION:An electromagnetic coil 28 is installed at the outer periphery of a plunger 27 which drives a control object such as a valve 26, etc. Yokes 29, 30, 31 are installed around the coil 28. An upper flat spring 33 and a lower flat spring 34 support the plunger 27 so that the plunger 27 may freely elevate without sliding in a sealed pipe 32 which is inserted in a hollow part of the electromagnetic coil 28. And when a coil current does not flow, flat springs 33, 34 deflect aganist the fitting plane to make a plunger move downward without sliding to close a valve part 23. When the coil current is the maximum, the flat springs 33, 34 are in the same plane as the fitting plane and support the plunger 27 without sliding. The torsion of the flat springs at the right angle to the shaft direction due to mangetic force does not work. |
