Patent ID: 7249362

Claim:
A disk chucking mechanism comprising: a spindle motor having a motor shaft; a disk table fixed to said motor shaft of the spindle motor for rotation in response to energization of said spindle motor; a chucking pulley for clamping and chucking a disk-shaped recording medium in coaction with said disk table, said chucking pulley having a rotary slide knob projecting away from said disk table; a support arm extending in a direction perpendicular to an axial direction of said chucking pulley, said chucking pulley being rotatably supported on an end of said support arm in a longitudinal direction thereof; a first lifting/lowering pin and a second lifting/lowering pin which are mounted on an opposite end portion of said support arm and spaced from each other in said longitudinal direction; a holder fixedly mounted on said support arm for pressing said chucking pulley toward said disk table while being held in contact with a distal end of said rotary slide knob when said disk-shaped recording medium is in rotation; a bias spring having a portion mounted on said support arm and another portion resiliently held against said first lifting/lowering pin; and a moving mechanism configured to move said chucking pulley toward and away from said disk table, said first lifting/lowering pin and said second lifting/lowering pin being movably supported by said moving mechanism; wherein said moving mechanism has a retainer for retaining said first lifting/lowering pin in an acting position when the disk-shaped recording medium is chucked; and wherein said first lifting/lowering pin retained in the acting position by said retainer elastically deforms said bias spring to bias said support arm and said holder to move toward said disk table.