ELECTROMAGNETIC ADJUSTING MEMBER

PURPOSE: To manufacture an electromagnetic adjusting member at an extremely low cost, and reduce danger of tightening component members by composing a closing member as a movable element on the side directed to an electromagnetic coil. CONSTITUTION: A control sleeve 4 disposed between an air inflow port 2 and an air outflow port 3 is protruded into a guide sleeve 5 fixed to a casing 1 by a forward end part. The control sleeve 4 composing a closing member 7 with a movable element 6, and it is coupled with the movable element 6 by a locking and coupling part 8. As a current is supplied to an electromagnetic coil 12, a cut 9 is moved to a conical part 10 on a return way body 11 disposed on the inner side of the electromagnetic coil 12. One end part of a return spring 21 acts on an end surface of an adjusting screw 20 on the side of the air inflow port 2, and the other end part of the return spring 21 is supported by the closing member 7. Two slits 22, 23 in the tangent direction are formed in the control sleeve 4 between the guide sleeve 5 and a guide cylinder 15.