JPH0454074U

JPH0454074U -

Info

Publication number: JPH0454074U
Application number: JP9473390U
Authority: JP
Priority date: 1990-09-11
Filing date: 1990-09-11
Publication date: 1992-05-08

Description

[Brief explanation of the drawing]

第１図は、本実施態様における磁気デイスクカ
ートリツジのシヤツタが装着された部分の部分斜
視図、第２図はシヤツタの内側の平面図であり、
第３図は第１図に示すシヤツタを成形するための
金型であつて、第１図におけるＡ−Ａ線に沿つた
部分に対応した断面図、第４図は磁気デイスクカ
ートリツジ全体の構成を示す平面図、第５図及び
第６図は従来の磁気デイスクカートリツジのシヤ
ツタが装着された部分の部分斜視図及びシヤツタ
の内側の平面図である。図中の符号、１，２１……磁気デイスクカート
リツジ、２…上ハーフシエル、３……下ハーフシ
エル、４……センターコア、５……磁気デイスク
、６……モータ軸挿入孔、７……開口、８……磁
気ヘツド挿入用開口、９，２２……シヤツタ、９
ａ……上側板、９ｂ……表側板、９ｃ……側面板
、１０，２３……開口部、１１……摺動領域部、
１２……ゲート、１３，１４，１５，１６……ピ
ン跡、１８……合わせ目、３０……固定金型、３
１……可動金型、３２，３３……突き出しピン、
４０……成形空間、５０……バリ。 FIG. 1 is a partial perspective view of a portion of the magnetic disk cartridge according to the present embodiment where the shutter is attached, and FIG. 2 is a plan view of the inside of the shutter.
FIG. 3 is a mold for molding the shutter shown in FIG. 1, and is a sectional view taken along the line A-A in FIG. 1, and FIG. 4 is the overall configuration of the magnetic disk cartridge. 5 and 6 are a partial perspective view of a portion of a conventional magnetic disk cartridge to which a shutter is attached, and a plan view of the inside of the shutter. Symbols in the figure: 1, 21...Magnetic disk cartridge, 2...Upper half shell, 3...Lower half shell, 4...Center core, 5...Magnetic disk, 6...Motor shaft insertion hole, 7... ...Opening, 8...Opening for magnetic head insertion, 9, 22...Shutter, 9
a... Upper side plate, 9b... Front side plate, 9c... Side plate, 10, 23... Opening, 11... Sliding area portion,
12... Gate, 13, 14, 15, 16... Pin trace, 18... Joint, 30... Fixed mold, 3
1...Movable mold, 32, 33...Eject pin,
40...molding space, 50...burr.

Claims

[Scope of utility model registration request]

A cartridge case consisting of an assembly of upper and lower halves, which houses a disk recording medium on which a predetermined information signal can be recorded and reproduced, and has an opening that exposes at least a part of the disk recording medium; In a magnetic disk cartridge equipped with a shutter made of synthetic resin that opens and closes dynamically, the shutter has a U-shaped cross section by integrally molding a top plate, a bottom plate, and a side plate connecting the top plate and the bottom plate. and is configured to be ejected from the mold by being ejected from the inside of the side plate by an ejector pin, and the abutment position of the ejector pin is provided at a location away from the parting line during molding of the cartridge case. A magnetic disk cartridge characterized by: