Patent ID: 8248195

Claim:
A flat electromagnetic actuator, comprising: a body which is composed of a single-piece member made of a magnetic material and comprises an attracting tapered part and a cylindrical, flat housing whose upper end is closed; a flat coil stacked body configured to stack a coil wound on a coil bobbin and being disposed in the body; a flat movable core configured to be attracted toward the attracting tapered part when the coil is energized, the movable core comprising a completely thin flat plate located on a top part of the flat movable core and facing the attracting tapered part, an annular projection and an annular inclined surface on an inner circumferential side thereof, the annular inclined surface having a tapered shape an approximately disc-shaped fixed core which is composed of a single-piece member made of a magnetic material and is located at a lower end of the housing which is hollow in the bottom, wherein the annular inclined surface has a diameter that becomes progressively larger toward the fixed core; a movable body configured to integrally connect and transfer with the movable core; bearings configured to support the movable body displaced in an axial direction thereof; a projecting supporting part configured to face the annular inclined surface of the movable core and support one of the bearings; and a cylindrical yoke configured to enclose the annular projection of the movable core, wherein the movable core, one of the bearings, the projecting supporting part, the annular projection, the cylindrical yoke, and the coil stacked body are disposed on a same surface and successively annularly provided from a center thereof to an outer circumference thereof.