Patent ID: 8669836

Claim:
A magnetic trigger ( 1 ), comprising at least one yoke ( 2 ) encompassing an armature opening ( 17 ), an armature ( 9 ) is disposed inside the yoke, the armature ( 9 ) being coaxially surrounded by at least one section of a coil body ( 5 ) having at least one excitation coil ( 11 ) and biased by a force from a preloaded spring element ( 10 ), wherein the armature ( 9 ) remains in a first end position due to the magnetic holding force of a permanent magnet ( 4 ) when current is not flowing through the excitation coil ( 11 ), wherein the permanent magnet ( 4 ) together with a socket ( 15 ) extending between the armature ( 9 ) and the permanent magnet ( 4 ) are arranged in an area of a first end of the armature ( 9 ), and wherein a second end position of the armature ( 9 ) is attained by briefly flowing a current through the excitation coil ( 11 ) accompanied by a reduction in the magnetic holding force and the then effective spring force, wherein (a) the first end of the armature ( 9 ) facing away from the armature opening ( 17 ) is centrally guided and the second end of the armature ( 9 ) facing the armature opening ( 17 ) is centrally guided by a centering ring ( 8 ) centered in the coil body ( 5 ), (b) the centering ring ( 8 ) is highly permeable and abuts the yoke ( 2 ) on the armature opening ( 17 ) and is radially movable relative to the yoke, (c) the socket ( 15 ) is centered in the coil body ( 5 ), wherein the centering ring ( 8 ) in conjunction with the coil body ( 5 ) secure a planar contact of the armature ( 9 ) in the region of the first end without tilt and ensures always maximum holding forces through the planar contact of the armature ( 9 ), (d) the spring element ( 10 ) has a greater diameter than the armature ( 9 ), and (e) the magnetic flux commutates upon triggering from a series connection to a parallel connection.