Abstract: In a snap-fit connection structure, an engaging member is formed with a locking piece having an engagement protrusion integrally formed on a side of a distal end. The locking piece is flexed so as to be inserted into an engagement hole which is formed in an engaged member and through which the engagement protrusion is allowed to pass. The engagement protrusion has an inclined face formed so as to be continuous to a side of the locking piece while its degree of protrusion is gradually reduced from a top engaging an opening edge of the engagement hole toward the opening edge side. The engagement hole is sized so that the locking piece is allowed to be turned in it.

Abstract: A back focus adjusting mechanism for an imaging camera includes a coil spring provided around a cylindrical portion of a lens mount of the camera, an imaging element holder holding an imaging element so that the imaging element is moved along an optical axis of an imaging lens by a guide of the lens mount, an adjusting ring provided with a cam the imaging element holder engages, a positioning holder fixed in the camera housing and positioning the adjusting ring so that the adjusting ring is rotatable around the cylindrical portion of the lens mount, the imaging element holder abutting the cam by rotation of the adjusting ring being moved, a spring member pressing the adjusting ring against the positioning holder and fixed in the camera housing, and a knob member operated outside the camera housing. The adjusting ring is fixed at an adjustment position while being subjected to a pressing force of the spring member by the knob member.

Abstract: A monitoring camera includes a camera housing, a camera body housed in the camera housing, a lens barrel protruding from the camera housing, and a lens housing mounted for protecting the lens barrel. The lens housing is detachably mounted on the camera housing by bayonet engagement.

Abstract: A monitoring camera includes a camera housing, a camera body housed in the camera housing, a lens barrel protruding from the camera housing, and a lens housing mounted for protecting the lens barrel. The lens housing is detachably mounted on the camera housing by bayonet engagement.