Slot-in optical disk drive

A slot-in optical disk drive comprising:

• a base plate disposed in the slot-in optical disk drive, a central hole formed at the center of the base plate, an arc slot formed near the middle side of the base plate;
• a transmission unit disposed on a side of the base plate to move a linkage plate set and drive a roller to roll, ascend and descend, the roller laterally disposed under the front end of the base plate;
• a clamping unit fastened around the periphery of the central hole of the base plate, the clamping unit driven by the linkage plate set to rotate, a first protrusion formed on and protruding from a side of the periphery of the clamping unit, a second protrusion formed on the rear of the periphery of the clamping unit;
• a front positioning part fastened on the front end of the base plate, both end of a linking rod driving a front right positioning bar and a front left positioning bar to open and close synchronously, a restoring spring fastened on the linking rod, an elastic force of the restoring spring making the front right positioning bar and the front left positioning bar lean against the inner side of the slot-in optical disk drive;
• a locking rod fastened on the base plate through a pivot, a limiting pin disposed on, protruding from one end of the locking rod and inserted into the arc slot, a touch block disposed on a side of the locking rod, a locking end protruding from the rear of the locking rod, a locking spring fastened on the locking rod, an elastic force of the locking spring making the limiting pin of the locking rod lean against the inner side of the arc slot, so that the touch block leans against a side of the first protrusion;
• a rear positioning part, a rear right positioning bar and a rear left positioning bar fastened on the rear of the base plate through pivots respectively, two arc racks disposed on the rear ends of the rear right positioning bar and the rear left positioning bar, and the arc racks are linked through idle gears, so that the rear right positioning bar and the rear left positioning bar open and close synchronously, a first positioning recess and a second positioning recess formed concavely on the front edge of the rear left positioning bar, a positioning spring fastened on the rear right positioning bar, an elastic force of the positioning spring making the rear right positioning bar linking the rear left positioning bar lean against the inner side of the slot-in optical disk drive, the locking end engaged with the first positioning recess;
• and
• a lever with a pivot disposed on the rear right positioning bar, the lever moving along with the rear right positioning bar, a touch end extending to the inner side of the slot-in optical disk drive, the other end linking the linkage plate set.