公开(公告)号：JPH02285570A

公开(公告)日：1990-11-22

申请号：JP7713290

申请日：1990-03-28

Applicant: BASF AG

Inventor： KURAUSU SHIETORE ,  YURUGEN DOREYAA ,  ZUIIKUFURIITO RIIGAA ,  BUIRI SHIYUUMAHAA

IPC: F16F1/18 ,  G11B23/087

Abstract: PURPOSE: To obtain a linear spring characteristic by providing a flat spring in a middle range continued to two spring arms curved in curved lines and as a fitting device, an opening and a recessed fitting collar around this opening. CONSTITUTION: This tape cassette is provided with a casing 11 fitted with the pressing springs 15 and 25 in the middle of a large wall and one or plural magnetic tape reel(s) loaded elastically by the pressing spring 25 toward its operating position. In this case, the pressing springs 15 and 25 consist of curved spring strips having the same width, and the fitting devices are provided at an interval in the middle range 20 of the springs respectively on their flat surfaces. Then, the two spring arms 21 and 22, each having the flat spring middle range 20 followed by the continuous part curved in the curve line (r), and as their fitting devices, at least one of the openings 16 and 24 and the recessed fitting collars 17 and 23 around these openings are further provided. By this method, the optimum spring characteristic can thus be obtained.