The invention relates to the technical field of automobile power supply switches, disclosing an adjustable
electromagnetic power supply switch. The adjustable
electromagnetic power supply switch comprises an upper casing (1), a lower casing (18), an iron core (13), a movable contact spring
assembly (12), a static contact spring
assembly (22), a coil rack
assembly (14), an enamelled wire (15) and the like, wherein magnetic conduction inner casings (17) are additionally arranged on the outer sides of the iron core (13), the coil rack assembly (14) and the enamelled wire (15); the inside diameters of the magnetic conduction inner casings (17) are the same as the excircle
diameter of the coil rack assembly (14); the upper casing (1) and the lower casing (18) are made of plastic; main contacts are respectively made of composite silver material; and adjusting screws (6) are additionally arranged at the top of the iron core. According to the adjustable
electromagnetic power supply switch disclosed by the invention, the problem of overlow or overhigh pull-in
voltage is solved; and the phenomenon that the switch is burnt down due to
short circuit caused by contact of a spanner and the upper casing when the switch is replaced, can be also avoided. The adjustable electromagnetic power supply switch disclosed by the invention has the advantages of adjustable
stroke, controllable clearance, cost saving, convenience for operation, safety and reliability.