JPH0164158U

JPH0164158U -

Info

Publication number: JPH0164158U
Application number: JP1987157541U
Authority: JP
Priority date: 1987-10-16
Filing date: 1987-10-16
Publication date: 1989-04-25

Description

[Brief explanation of the drawing]

第１図は本考案の実施例の一部切欠斜面図、第
２図はデイスクの平面図、第３図は第２図線
の拡大縦断面図、第４図はハブの分離状態を示す
切断側面図、第５図はその斜面図、第６図は第２
図線の拡大縦断面図、第７図は従来例のデイ
スクの側面図を示す。１…駆動軸挿入孔、２…デイスクハブ、２_１…
当接面、３…デイスク、４…カートリツジケース
、５…中心孔、６…凸部、６_１…融着部。 Fig. 1 is a partially cutaway perspective view of an embodiment of the present invention, Fig. 2 is a plan view of the disk, Fig. 3 is an enlarged vertical cross-sectional view along the line of Fig. 2, and Fig. 4 is a cutaway showing the separated state of the hub. The side view, Figure 5 is the slope view, and Figure 6 is the second view.
FIG. 7 shows a side view of a conventional disk. 1... Drive shaft insertion hole, 2... Disc hub, 2 ₁ ...
Contact surface, 3... Disk, 4... Cartridge case, 5... Center hole, 6... Convex portion, 6 ₁ ... Fusion portion.

Claims

[Claims for Utility Model Registration] (1) In a disk cartridge in which a disk 3 equipped with a disk hub 2 having a drive shaft insertion hole 1 is rotatably housed in a cartridge case 4, the upper surface side of the disk It is a split disk hub that is held from both sides of the lower surface side, and has protrusions 6 that fit into the center hole 5 of the disk 3 protrudingly provided on the opposite surfaces thereof, and the protrusions 6, 6 are fused and connected. A disk hub in a disk cartridge, characterized in that a disk hub 2 is attached to a disk 3. (2) The disk hub 2 has a contact surface ₂₁ that comes into close contact with the upper or lower surface of the disk 3, and has a ring-shaped convex portion 6 that projects from the contact surface ₂₁ . The disk hub according to claim 1 of the utility model registration claim. (3) The disk hub 2 is made of polycarbonate resin and is a ring body in which a metal plate ₂₂ with a drive shaft insertion hole 1 is embedded in the center part. Or the disk hub described in paragraph 2. (4) The convex portion 6 is located in the center hole 5 of the disk 3.
It is a cylindrical wall body with an outer periphery that fits into the disk 3, and has a welded portion ₆₁ on at least one top surface to be butted and connected, and the connected convex portions 6, 6 are connected to the disk 3.
The disk hub according to any one of claims 1 to 3 of the utility model registration claim, wherein the disk hub is protruded to a height that is less than or equal to the thickness of the disk hub.