| 摘要 |
<p>Provided is a lens device for surveillance camera, with which it is possible to securely lock an operating ring without deforming a lens-barrel, and with which the locking operation of the operating ring can be performed easily. When a locking knob (46) is rotated, screwing in the locking knob (46) into the focus ring (14), a brake member (40) which is integrated with the locking knob (46) moves towards a focus ring (14) and the entire inner peripheral surface of the brake member (40) comes into contact with the focus ring (14). At the same time, a brake ring (42) moves in the direction away from the brake member (40), and the inner periphery of the brake ring (42) touches the focus ring (14). In this way, when the locking knob is screwed into the focus ring (14), the brake member (40) and the brake ring (42) sandwich the focus ring (14) from above and below, thereby locking (fixing in place) the focus ring (14).</p> |
