Patent ID: 8204259

Claim:
A condenser microphone comprising: a microphone housing formed of a metallic cylindrical body having a microphone unit; an output connector provided with a predetermined number of terminal pins in a metallic connector sleeve; a battery holder provided between the microphone housing and the output connector; and a battery cover formed of a metallic cylindrical body for opening and closing the battery holder by sliding, the battery cover having a length for covering at least a part of the connector sleeve in a state in which the battery holder is closed, and being slid to the output connector side when the battery holder is opened, wherein a first ring-shaped groove is formed in the outer peripheral surface of a portion covered with the battery cover of the connector sleeve; in the first ring-shaped groove, there is disposed a conductive member consisting of a circular conical tube body in which one end thereof on the battery holder side has a diameter larger than the inside diameter of the battery cover in a no-load state and is in elastic contact with the inner peripheral surface of the battery cover, and the other end thereof on the opposite side has a diameter approximately equal to the diameter of the groove bottom of the first ring-shaped groove; and in the inner peripheral surface of the battery cover, there is formed a second ring-shaped groove with which the one end of the conductive member increases in diameter and engages when the battery holder is opened.