Magnet switch with magnetic core designed to ensure stability in operation thereof

摘要

A magnet switch (1) which may be employed in automotive engine starters is provided. The magnet switch includes a stationary magnetic core (6) made up of a disc assembly (61) and a core body (60). The disc assembly (61) is made of a stack of annular plate members superposed on each other. Each of the plate members has an opening through which a terminal lead of a magnetic coil (5) extends. The core body (60) has a boss with an edge which is plastically deformed outwardly in the radius direction thereof or staked to create an elastic nip which retains the stack of the plate members firmly on the core body. This structure ensures the joint between the disc assembly (61) and the core body (60) to withstand mechanical impact exerted on the magnetic core (6) and stability in operation of the magnet switch (1) without increasing a total production cost of the magnetic switch.