Disk positioning mechanism for flexible magnetic disk drive apparatus

Claim 1

A disc drive apparatus comprising: a housing having an opening at a front end thereof through which a disc can be inserted; a door rotatably supported by a horizontal shaft and movable between open and closed positions; spindle means for rotating said disc around a vertical axis substantially perpendicular to said horizontal axis; a disc clamper assembly means, rotatable about said vertical axis and movable along said vertical axis, for holding said disc between said disc clamper assembly and said spindle; link mechanism means for interlocking said door and disc clamper assembly and causing said disc clamper assembly to hold said disc between said spindle and disc clamper assembly responsive to said door being in said closed position, said link mechanism including a door lever having front and rear portions and a projection protruding downward from an intermediate portion thereof, and a clamper hanger having front and rear portions, the door lever being swingably fitted at its rear portion to a first portion of an upper wall of said housing in a vicinity of said disc clamper assembly, and connected at its front portion to the door by means of said horizontal shaft; and spring means for biasing, in an upward vertical direction, said door lever front portion, to always bring at least one upper edge portion of said door into contact with a second portion of said housing upper wall, whereby said door lever front portion is vertically moved by the opening/closing of said door, said clamper hanger being rotatably supported at its front portion with a horizontal shaft held by the housing at a position between said door and said door lever projection, and engaged at its rear end with the clamper hanger to vertically move said disc clamper assembly, said clamper hanger being engaged at an under side thereof with said door lever projection fixed to said door lever for pushing said clamper hanger in an upward vertical direction, whereby when the door is opened, said door lever front end moves upward and said clamper hanger is pushed upward by said projection, causing said clamper hanger rear end to move upward for releasing said disc clamped between a disc clamper assembly and said spindle.