Abstract: The image forming apparatus includes a chassis having first and second side surfaces of the chassis; an ink sheet cartridge detachably disposed between the first and second side surfaces of the chassis; a take-up reel engaging the take-up bobbin; and a feed reel engaging the feed bobbin. The ink sheet cartridge includes a casing, a take-up bobbin and a feed bobbin disposed within the casing, first and second compression coil springs respectively coupled to circumferences of portions of the take-up bobbin and the feed bobbin so as to bias the take-up bobbin and the feed bobbin in the longitudinal direction. At least one of the take-up reel and the feed reel engages the corresponding one of the take-up bobbin and the feed bobbin without a biasing member being disposed between the first surface of the chassis and the corresponding one of the take-up bobbin and the feed bobbin.

Abstract: The image forming apparatus includes a chassis having first and second side surfaces of the chassis; an ink sheet cartridge detachably disposed between the first and second side surfaces of the chassis; a take-up reel engaging the take-up bobbin; and a feed reel engaging the feed bobbin. The ink sheet cartridge includes a casing, a take-up bobbin and a feed bobbin disposed within the casing, first and second compression coil springs respectively coupled to circumferences of portions of the take-up bobbin and the feed bobbin so as to bias the take-up bobbin and the feed bobbin in the longitudinal direction. At least one of the take-up reel and the feed reel engages the corresponding one of the take-up bobbin and the feed bobbin without a biasing member being disposed between the first surface of the chassis and the corresponding one of the take-up bobbin and the feed bobbin.

Abstract: The invention provides a lever displacement enlarging mechanism which is applicable for a positioning apparatus of an optical stage, is provided with bisymmetrical levers enlarging and transmitting a displacing force of an actuator element, and in which the distance between the leading end sides of boundary grooves and outer edges of coupling posts is smaller than that between the trailing end sides thereof and the outer edges and action point hinges are located closer to the axis of symmetry so that the fulcrum hinges and the force point hinges are closer to the outer edges of the coupling posts.