ELECTROLYTIC CAPACITOR, CIRCUIT BOARD, AND ELECTRONIC APPARATUS

PROBLEM TO BE SOLVED: To surely suppress gas or the like from leaking to the outside. SOLUTION: The electrolytic capacitor 10 includes an electrolytic capacitor body 20 containing an electrolytic capacitor element 22, a tubular case 24, an annular recess 26, and a safety valve 28. The capacity also includes an expandable sealing member 40 which has one opening 42 and covers the tubular case 24 so as to shield the safety valve 28 and its surroundings from outside air while being fixed to the outside surface of the tubular case 24 in such a state that the opening 42 side tightly contacts with the annular recess 26. The capacity further includes a coil spring 60 wound in the circumferential direction of the tubular case 24 with a minimum turn of more than one so as to pinch the sealing member 40 between the annular recess 26 and itself. COPYRIGHT: (C)2011,JPO&INPIT