ELECTROMAGNETIC PUMP

PROBLEM TO BE SOLVED: To provide an electromagnetic pump able to reliably and inexpensively realize electric insulation between a terminal receiving part of an electromagnet and a metallic casing, and having good assemblage of the casing. SOLUTION: In an electromagnetic pump for sucking and discharging air by operating a diaphragm connected to a vibrator 28 by excitation of an A.C. electromagnet 29, insulating plates 41 to be elastically deformed are pinched between a metallic casing 23 housing the vibrator 28 and the electromagnet 29 and the electromagnet 29. Each insulating plate 41 is provided with a first flap part 41a to be inserted between a terminal receiving part 36 of the electromagnet and the inner surface of a side wall 24c of a casing 24 of the casing 23 approached to the terminal receiving part, a second flap part 41b bent from the flap part 41a and positioned between the terminal receiving part and an upper cover 26 of the box body, and a third flap part 41c bent upward from the flap part 41b and to be pressed by the upper cover. Therefore, the terminal part of a coil 29b of the electromagnet connected to the terminal receiving part 36 formed on a coil bobbin 29c of the electromagnet and a terminal fitting 37 of an external lead wire 38 are electrically insulated in relation to the casing 23.