Patent ID: 7757243

Claim:
An optical disc drive, comprising: a main frame; a tray to be inserted into or ejected from the main frame to load or unload a disc; and a tray holding unit to bias the tray so as to restrict the vertical and lateral movement of the tray when the loading/unloading of the tray is completed; wherein the tray holding unit comprises: a plurality of catching protrusions formed at opposite side surfaces of the tray; and a plurality of holders formed at the main frame, such that the catching protrusions are inserted into the holders, respectively, when the loading/unloading operation of the tray is completed, to restrictively bias a movement of upper and side surfaces of the catching protrusions inserted in the holders, wherein the holders comprise: front holders disposed at front parts of the inner surfaces of the opposite sides of the main frame to restrictively bias the corresponding catching protrusions when the loading or unloading operation of the tray is completed; rear holders disposed at rear parts of the inner surfaces of the opposite sides of the main frame to restrictively bias the corresponding catching protrusions when the loading operation of the tray is completed; and catching grooves into which the catching protrusions are inserted, respectively, wherein the catching grooves comprise: first restricting parts to restrictively bias upper surfaces of the catching protrusions; and second restricting parts to restrictively bias side surfaces of the catching protrusions.