Selection piece of a tape cartridge for preventing erroneous erasure

摘要

A tape cartridge according to the invention includes: a main case 1; a display window 8 opened on a part of an outer circumferential wall of the main case 1; and a selection piece 9 placed inside the display window 8 for preventing erroneous erase, wherein the selection piece 9 integrally has a cylindrical section 10 and an operation dial 11 each provided in such a way as to face the display window 8, and rotation shafts 12, 13 provided at the upper and lower sides thereof, wherein the cylindrical section 10 has a major arc-shaped cylindrical wall 20 formed concentrically around the rotation shafts 12, 13 and a planar wall 21 which connects end sections of the cylindrical wall 20, and wherein an outer surface of the planar wall 21 and an outer surface of the cylindrical wall 20 opposing the planar wall 21 have a prohibition display 22 signifying an unrecordable state and an admission display 23 signifying a recordable state, respectively.