Patent ID: 7692719

Claim:
A closed circuit television comprising: an outer case including a body of hollow shape, a front cover which is detachably connected to a front of the body and a rear cover which is detachably connected to a rear of the body; a camera unit including a camera module disposed in an inner space of the body and fixedly supported between multiple support rods whose rear sections are fixed closely to a front of the rear cover, and a lens holder installed on the camera module for moving forward and backward; a lens assembly including a focus adjusting unit incorporating a lens and installed in a front section of the lens holder for moving forward and backward by a rotational operation, and a distance adjusting unit incorporating a lens and installed in a front section of the focal adjusting unit for moving forward and backward by a rotational operation; a gear assembly including a focus adjusting gear fixedly installed on a circumferential surface of the focus adjusting unit, a distance adjusting gear fixedly installed on a circumferential surface of the distance adjusting unit, and a first and a second operational gears of which gear tooth is engaged with corresponding ones of each of the focus adjusting gear and the distance adjusting gear; and a first and a second shafts whose one sections are joined to the first and the second operation gears, respectively, and whose other sections are exposed to the outside through a shaft penetration hole of the rear cover to thereby enable rotational operations of the first and second shafts.