Patent ID: 7555764
Filing Date: 2009-06-30
Classification: G11B

Abstract:
1. A shutter member used in a cartridge having a case member, the case member including a medium storage section for storing an information medium having an information layer and a window section configured to allow at least a head to be inserted, the head being used to perform a recording operation or a reproduction operation for the information layer, the shutter member comprising: a base member operable to slide along a sidewall of the case member; and a plate member engaged with the base member, which is operable to open/close the window section of the case member in accordance with a sliding motion of the base member, wherein the base member and the plate member are engaged with each other such that the plate member can be removed from the base member; characterized in that one of the base member and the plate members includes rotary shafts and the other one comprises bearing sections, whereby the base member and the plate member are removably and rotatably engaged with each other by inserting the rotary shafts in the bearing sections.