Patent ID: 6486762
Filing Date: 2002-11-26
Classification: F02N,H01H

Abstract:
A magnetic switch for a starter motor, comprising:a coil for generating magnetic flux upon energization thereof; a magnetic core member disposed around the coil for providing a magnetic flux path for the magnetic flux generated by the coil; a switch cover containing a pair of stationary contacts and a movable contact therein; a cup-shaped frame having an open end for containing the magnetic core member therein and connecting the switch cover to the magnetic core member; and a plunger disposed in the magnetic core member for driving the movable contact to close or open the pair of the stationary contacts, wherein: the magnetic core member includes a first core, a second core and a cylindrical yoke disposed between the first and the second cores; the first core, the cylindrical yoke and the second core are all pressed together by a first axial force generated by peening a peripheral portion close to the open end of the cup-shaped frame; wherein: the cup-shaped frame includes a bottom wall and a cylindrical portion; the cylindrical portion has a squeezed portion having an inner diameter a little smaller than an inner diameter of the cylindrical portion, the squeezed portion being connected to the bottom wall; and the first core is disc-shaped and is forcibly inserted in the squeezed portion.