Patent ID: 7421719

Claim:
A disc recording/reproducing apparatus, comprising: a main frame; a disc cartridge, comprising: a case having an opening on a bottom thereof to expose a disc-type recording medium and a window on a sidewall thereof, a shutter mounted in the case to expose and cover the opening, a rotary wheel to operate in association with the shutter and having a segment gear and a concave cut on a rim thereof, and a latch unit formed at one side of the case to control rotation of the rotary wheel; a tray to mount the disc cartridge, with the tray moving linearly forward and backward with respect to the main frame; a shutter opening/closing unit, comprising: a static part to connect to one side of the main frame, a rack member formed as a cantilever type arrangement connected to one side of the static part to engage with the segment gear of the rotary wheel, and first and second connection ribs formed as a cantilever type arrangement connected to both ends of the static part and having first and second shutter opening/closing projections at one end thereof, respectively; and a cam to guide the rack member to contact with the segment gear and be distanced from the latch unit, during an opening/closing operation of the shutter.