NONUTILITY GENERATION TYPE ELECTROMAGNETIC SWITCH

摘要

PURPOSE: An electronic switch including a self-power generation function is provided to prevent damage generated by errors by blocking the influence of an electronic wave. CONSTITUTION: An electronic switch comprises a pressure switching unit (10), a latching relay (50), a latching relay driving unit (40), a switching state information storage unit (30), and a microcomputer (20). The pressure switching unit supplies power according to pressure. The latching relay switches commercial power sources in a load. The latching relay driving unit drives a latching relay. A switching state information storage unit stores the switching state of the latching relay. The microcomputer controls the latching relay driving unit according to the switching state stored in the switching state information storage unit when the power is supplied from the pressure switching unit. [Reference numerals] (12) Piezoelectric element; (14) Rectifying unit; (16) Capacitor; (20) MICOM; (30) Switching state information storage unit; (40) Relay operating unit