Disk cartridge lifter with cutout across folding line
AssigneeSony Corporation
InventorsShuichi Kikuchi, Kiyoyuki Miyata
Life of this patent
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Abstract
A lifter for a disk mounted in a disk cartridge comprises a lifter body formed of a flexible thin plate material and having a fold, folded at a predetermined angle so as to define a fixing member at one side of the fold and a pressing member at the other. A cutout is formed at a position across the fold to minimize distorting forces concentrated at the fold.
Claims17
A lifter for a disk mounted in a disk cartridge comprising:
- an essentially flat single thickness thin plate;
- a cutout of predetermined shape formed in said flat thin plate;
- and
- means defining a fold which extends across said flat thin plate and through said cutout and which separates a base member which is fixed to said disk cartridge and a pressing member which extends from said base member at a predetermined angle.
A lifter for a disk mounted in a disk cartridge comprising:
- a thin plate member having a base portion adapted for connection to said disk cartridge and a pressing portion which extends a predetermined angle with respect to said base member;
- and
- a cutout of predetermined shape formed partly in said base member and partly in said pressing portion and located so as a fold line which separates said base portion from said pressing portion passes through said cutout.
A lifter for a disk mounted in a disk cartridge comprising:
- a base portion adapted for connection to said disk cartridge;
- a pressing portion which is integral with base member and which extends a predetermined angle with respect to said base member;
- and
- means for unifying the pressure applied by said pressing portion comprising a cutout of predetermined shape formed partly in said base member and partly in said pressing portion and located so that a fold line which separates said base portion from said pressing portion passes through said cutout.
A lifter for a disk mounted in a disk cartridge comprising:
- a lifter body being formed of a flexible thin plate material and having a fold, folded at a predetermined folding angle to define a fixing member extending at one side of said fold to an edge of said lifter body and a pressing member extending from another side of said fold opposite said fixing member, a cutout further being formed at a position across said fold.
A method for forming a lifter for a disk mounted in a disk cartridge comprising:
- punching a lifter body from a flexible thin plate material;
- folding said plate material at a predetermined folding angle to form a fold so as to define a fixing member extending at one side of said fold to an edge of said lifter body and a pressing member extending from another side of said fold opposite said fixing member;
- and
- forming a cutout further at a position across said fold.
A disk cartridge, comprising:
- upper and lower shells attached to form a cartridge casing having a clearance therewithin between said upper and lower shells;
- a flexible disk rotatably mounted in said clearance;
- a cleaning sheet interposed between said flexible disk and said cartridge casing;
- a lifter arranged between said cartridge casing and said cleaning sheet and comprising a lifter body being formed of a flexible thin plate material and having a fold, folded at a predetermined folding angle to define a fixing member extending at one side of said fold to an edge of said lifter body and attached to an inner surface of said cartridge casing and, a pressing member extending from another side of said fold opposite said fixing member, said pressing member applying pressure to said cleaning sheet, a cutout further being formed in said lifter at a position across said fold.
Dependencies are inferred from the claim text.