Patent ID: 7357344
Filing Date: 2008-04-15
Classification: G11B

Abstract:
1. An information medium, comprising: a tape reel around which a magnetic tape is wound; a case body that rotatably encloses the tape reel; a lid comprising a support plate that is pivotally attached to the case body, the lid opening and closing a withdrawal opening configured to allow removal of the magnetic tape; and a coil spring positioned between the case body and the lid so that a first arm of the coil spring engages a top plate of the case body and a second arm of the coil spring engages the lid, the coil spring being configured to bias the lid in a direction of pivotal movement so as to close the withdrawal opening, wherein a pair of protruding portions are provided on the top plate; and the coil spring being provided so that the first arm extends linearly and an end of the first arm is configured to protrude from a withdrawal opening-side edge of the top plate, the first arm being positioned within a gap provided at a corner portion of the top plate, the gap being defined by a space provided between the pair of protruding portions.