Recording/erasing prevention device

摘要

A tape cartridge includes a casing having an upper portion and a lower portion. A channel formed in the upper of portion of the casing is disposed at a corner portion defined by an external upper surface and an external lateral surface of the casing. The channel has a first rectangular-shaped portion formed in the upper surface and a second, adjacent rectangular-shaped channel formed in a lateral surface of the cartridge. A read-only detection opening is formed within the channel. A slidable write-protect member having a main portion and a side portion formed perpendicular to the main portion is disposed within the recess and moves between a first position in which the side portion covers the read-only detection opening and a second position in which the read-only detection opening is exposed. A tapered potion is formed in the upper portion of the casing in proximity to the channel. The tapered portion provides a space for a user to slide the write-protect member along the channel.