| 摘要 |
A battery holder comprises first and second caps (10, 12) and a cylindrical socket (28). The socket forms two spaces therein separated by an abutment midway of the socket and each opening at one end of the socket. Each space shall hold a battery (13, 14) with the central pole contact (36) thereof positioned at the end of the socket. The socket is positioned selectively with one battery of the other engaging said contacts located at said first cap. Clamping means (17, 39, 44) holds the caps together with the socket therebetween. The socket (28) forms an outside circumferential groove (29) at each end thereof and in each groove forms at least one slot (30) through the cylindrical wall of the socket, extending over a minor part of the circumferential length of the groove (29). An elastic O-ring (31) is received in each groove forming a straight portion (31') extending through the slot (30) inside the socket. |
