Recording and/or reproducing device having an ejection amount adjustment mechanism capable of changing ejection amount in a software fashion

摘要

An ejection position detection mechanism has an arc-shaped plate, attached to a mode gear, having a plurality of detected elements provided at positions corresponding to a plurality of ejection positions of a cartridge, and a detection arrangement, disposed near to the arc-shaped plate, for detecting the plurality of detected elements. The arc-shaped plate consists of a shielding plate. The plurality of detected elements consist of an edge of the shielding plate and two slits formed on the shielding plate. The detecting arrangement consists of a photo-interrupter.