DISK CARTRIDGE,申请号JP19840102906-传众专利搜索

DISK CARTRIDGE

申请公布号：JPS60247875(A)

申请号：JP19840102906

申请日期：1984.05.22

申请公布日期：1985.12.07

申请人：

MATSUSHITA DENKI SANGYO KK

发明人：TAKEUCHI KAZUMASA;KAMIYAMA TOSHIBUMI

分类号：G11B23/033

主分类号：G11B23/033

摘要：PURPOSE:To minimize the fluctuation of the thickness of liners so as to obtain stable running torque, by constituting a disk cartridge of a center window, head window, liners putting a recording medium in between them, and a hard case which is equipped with a liner fitting section whose thickness is made thicker than the basic thickness of the hard case and divided into upper and lower parts. CONSTITUTION:The thickness 12 of hard cases 2a and 2b at a liner fitting section 8 is set about 4/3 times thicker than the basic thickness 10 of the hard cases 2a and 2b and the thickness 13 of liners 7a and 7b (under a non-loaded condition) is set to 1/5 or less of the thickness 12 of the hard case 2a and 2b at the liner fitting section 8. In the case of the hard case thus constructed, the thickness of the liner fitting section 8 of the hard cases 2a and 2b becomes thicker and their formability is improved. In addition, the curvature of the surface is minimized and flow of the resin at the time of forming is improved. Moreover, since the thickness of the liners 7a and 7b is reduced, fluctuation of the thickness of the liners 7a and 7b is minimized and, as a result, the running torque of a discoidal recording medium 1 is stabilized.