Electrical switch for starters

Abstract

An electromagnetic switch for starting mechanisms of internal combustion engines whose switching pin (22), which carries the contact bridge (29) for the main current contacts (13 and 14), is provided with a guide sleeve (25) with which the switching pin (22) is supported and guided in a magneto armature (15) and in a magnetic core (2). The switching pin (22) is supported at springs (21 and 36) and, accordingly, at the magneto armature (15) and the magnet core (2) by means of the guide sleeve (25). An armature return spring (21) supported at the magneto armature (15) contacts the guide sleeve (25). A stronger pressure spring (36) supported at the magnet core (2) contacts the guide sleeve (25). The magneto armature (15) and the switching pin (22), together with the guide sleeve (25), can move relative to one another. Accordingly, the spacing between the contact bridge (29) and the main current contacts (13 and 14) can be kept substantially smaller than the pulling-in distance of the magneto armature (15) to the magnet core (2). The pressure spring (36) disengages the contact bridge (29) from the main current contacts in a reliable manner after the switch is switched off, returns the switching pin (22) to its rest position and moves the magneto armature (15) away from the magnetic core (2), after which the armature return spring (21) continues to move the magneto armature (15) into its initial position.

Dependencies are inferred from the claim text.