Patent ID: 9142374
Filing Date: 2015-09-22
Classification: H01H,H01P

Abstract:
1. A solenoid linear actuator in a coaxial radio frequency switch comprising: a solenoid having multiple conducting wires wound around a bobbin; a unibody soft magnetic core having a central body further comprising an upper disk and a lower end extrusion at its two ends, wherein the diameters of said upper disk, said central body and said lower end extrusion are in a descending order; an upper soft magnetic plate and a lower soft magnetic plate, wherein said upper and lower soft magnetic plates comprising openings which are primarily concentric to said soft magnetic core, and wherein the diameter of said opening in the upper soft magnetic plate is preferably larger than the diameter of said central body of soft magnetic core and smaller than the diameter of said upper disk, and the diameter of the opening in said lower soft magnetic plate is preferably larger than the diameter of said lower end extrusion; a pusher-conductor assembly supported by a restoring spring; at least two conductor terminals; wherein energizing said solenoid magnetizes said soft magnetic core and causes said soft magnetic core to be attracted to said upper and lower soft magnetic plates and pushes said pusher-conductor assembly downward to connect said conductor terminals; and wherein de-energizing said solenoid removes the magnetization in said soft magnetic core and cancels the magnetic attraction between said soft magnetic core and the upper and lower soft magnetic plates and consequently said restoring spring pushes said pusher-conductor assembly upward to disconnect said conductor terminals.