Patent ID: 6542459
Filing Date: 2003-04-01
Classification: G11B

Abstract:
A cartridge for accommodating a tape-like member or a disk-like member, comprising:a case; an opening formed in said case; a shutter, composed of a light metal material, for opening and closing said opening; said shutter having a hole formed in the surface thereof, with which an external drive member is impingable to drive said shutter, wherein a resinous protection layer having a thickness of 12&mgr;m to 40 &mgr;m is provided on a surface of said shutter upon which the drive member is impingable when engaging with said hole, and contains a lubricating agent within a range of 2 to 10.5% by weight, wherein the inner side peripheral surface of said hole comprises a continuous surface continuous with the shutter surface and has at least one bending surface in proximity with the hole, and said continuous surface is bent at said bending surface with respect to the shutter surface so as to have a substantially curved shape said continuous surface formed by said bending surface, extends in a direction perpendicular to said opening formed in said case.