Core structure for switch, has steel insert portion that is welded with core portion along longitudinal direction and long sides which are provided with recess-free side surfaces

摘要

The structure (1) has a core portion (2) that is fixed on an insert portion (3). The insert portion is made of steel and is welded with the core portion along a longitudinal direction. The core portion is provided with a recess for the insert portion. The recess is extended along the width of the core portion. The long sides are provided with recess-free side surfaces. An independent claim is included for method for manufacturing core structure of switch.