Patent ID: 6488223
Filing Date: 2002-12-03
Classification: G11B

Abstract:
A magnetic tape cartridge, comprising:a cartridge case including an opening portion, an upper cartridge and a lower cartridge, the upper cartridge having a supporting shaft, and the lower cartridge having a recessed portion; a reel, around which a magnetic tape can be wound, accommodated in the cartridge case, wherein the magnetic tape can be drawn out from the opening portion of the cartridge case; a lid pivotably attached to the supporting shaft in order to open and close the opening portion; a lid spring being a torsion coil spring having a coil portion which is a compressive spring, the lid spring being attached to the supporting shaft through the coil portion so as to urge the lid to close the opening portion; and a lid lock member urged toward the lower cartridge by a lid lock spring so as to be engaged with the recessed portion of the lower cartridge, wherein, when the lid lock member engages with the recessed portion, the lid lock member locks the lid to close the opening portion, and, when the lid lock member is disengaged from the recessed portion, the lid can pivot.