Patent ID: 7448569
Filing Date: 2008-11-11
Classification: G11B

Abstract:
1. A cartridge case comprising: a case main body; a tape reel having a cylindrical bottomed hub, which includes a first teeth portion formed to an inner surface of a bottom plate thereof in an annular or arc shape when viewed in a plane, and rotatably accommodated in the case main body; and a non-rotatable lock member including a second teeth portion, which is formed on a bottom portion thereof in an annular shape when viewed in a plane and is engaged with the first teeth portion to restrain the rotation of the tape reel, and is accommodated in the case main body so as to be urged to the bottom plate and to move along a direction where it becomes close to and separates from the bottom plate to thereby restrain the rotation of the tape reel and allow rotation of the tape reel, respectively, wherein the lock member comprises at least one of an inner peripheral projection, which is formed to an inner peripheral side of the second teeth portion, projects toward the bottom plate beyond a teeth tip of the second teeth portion, and is engaged with the tape reel so as to contact the inner peripheral side of the first teeth portion when the first teeth portion is engaged with the second teeth portion, and an outer peripheral projection which is formed to an outer peripheral side of the second teeth portion, projects toward the bottom plate beyond a teeth tip of the second teeth portion, and is engaged with the tape reel so as to contact the outer peripheral side of the first teeth portion in the above engaged state, and wherein the at least one of the inner peripheral projection and outer peripheral projection has a projecting length that projects toward the bottom plate beyond the teeth tip of the second teeth portion, the projecting length being longer than teeth height of the second teeth portion.