公开(公告)号：JPH05101587A

公开(公告)日：1993-04-23

申请号：JP8700592

申请日：1992-04-08

Applicant: BASF MAGNETICS GMBH

Inventor： FUUBERUTO FUEERENBATSUHA ,  BUORUFUGANGU KURAMAA

IPC: G11B23/03

Abstract: PURPOSE: To prevent friction caused when a closing member is hooked by an approach opening by forming a prescribed angle between the front edge side of an open window and the front edge side of the approach opening when the closing member moves to the open position. CONSTITUTION: A shutter 7' of a diskette 5 is provided with a rectangular open window 9' in a size almost equivalent to the size of an approach opening 10 provided at a case 6, and when the shutter 7 is moved, the window 9' is overlapped with the opening 10 so that a head can be allowed to approach. While the shutter 7' is moved to the open position, a prescribed angle α is formed between a front edge side K' of the open window and a front edge side V' of the opening 10. Thus, the edge sides K' and the V' can be made in contact with each other at one point, and friction can be reduced. Also, the angle α can be provided between the rear edge side of the open window and the rear edge side of the opening 10, and the edge sides can be formed into a curved line shape.