Patent ID: 6471151
Filing Date: 2002-10-29
Classification: G11B

Abstract:
A reel spring for use in a magnetic tape cassette having a cassette case and a pair of reels wound with a magnetic tape and rotatably provided in said cassette case, said reel spring for forcing one of said pair of reels in an axial direction of rotation, comprising:a fixing portion for being fixed to said cassette case, said fixing portion having a boss hole for being engaged to a boss of the cassette case; an arm portion which forces on said one of said reels in the axial direction of rotation; and a bending portion to form an L-like shape provided between said fixing portion and said arm portion, wherein a ratio of a length of said fixing portion to a height of the boss is equal to or more than 4.0, and wherein said length of said fixing portion is longer than a length of said arm portion by from 1 mm to 5 mm.