| 摘要 |
<p>A share type electromagnetic lock is disclosed whose armature (22) can approach the electromagnet (10) from any transverse direction, which can be mounted in any orientation with respect to gravity, and which does not require any door position sensing means. The armature includes a pair of standoffs (28) in the form of conically projecting buttons affixed thereto, the buttons projecting from the plane of contact between the armature (22) and the electromagnet (10). The buttons (28) have a base angle of 60-80 degrees adjacent the armature, and an angle of 45 degrees distal from the armature, and terminate in a smoothly rounded point. The armature is mounted to a sub-plate (24) via counteracting springs (36 and 38) such that the armature 'floats' on the sub-plate, with the distance between the armature and the sub-plate being adjustable via adjusting screws (26). A matching electromagnet assembly (10) for mounting to a door frame includes matching conical depressions (16) positionally corresponding to the conical buttons such that the buttons (28) seat into the depressions (16) when the armature (22) and electromagnet (10) are properly aligned. The buttons (28) and recesses (16) are arranged in a staggered pattern.</p> |
