JPS6198278U

JPS6198278U -

Info

Publication number: JPS6198278U
Application number: JP18059284U
Authority: JP
Priority date: 1984-11-28
Filing date: 1984-11-28
Publication date: 1986-06-24

Description

[Brief explanation of the drawing]

第１図は本考案のデイスクカセツトの上ハブ、
磁気デイスクおよび下ハブを示す外観図、第２図
は第１図に示すデイスクカセツトの一部縦断面図
、第３図は上ハブの凸部を下ハブの凹部底面に当
接した状態を示す縦断面図、第４図は上ハブの凸
部を下ハブの凹部に溶着した状態を示す縦断面図
、第５図は従来のデイスクカセツトを示す上面図
、第６図は第５図の横断面図、第７図は第６図の
上ハブへの下ハブのかしめ方法を示す説明図、第
８図は磁気デイスクの内周面に形成される粗面加
工を示す説明図、第９図は磁気デイスクと上ハブ
および下ハブとの間に両面テープを介挿した状態
を示す説明図である。１……ケース本体、２……上ケース、３……下
ケース、４……磁気デイスク、５……上ハブ、６
……下ハブ、１８……貫通穴、２０……凹部、２
２……凸部。 Figure 1 shows the upper hub of the disk cassette of the present invention.
An external view showing the magnetic disk and the lower hub, Fig. 2 is a partial vertical sectional view of the disk cassette shown in Fig. 1, and Fig. 3 shows the state in which the convex part of the upper hub is in contact with the bottom of the recessed part of the lower hub. 4 is a vertical sectional view showing the convex portion of the upper hub welded to the recessed portion of the lower hub, FIG. 5 is a top view showing a conventional disk cassette, and FIG. 6 is a cross-sectional view of FIG. 5. 7 is an explanatory diagram showing the method of caulking the lower hub to the upper hub in Fig. 6, Fig. 8 is an explanatory diagram showing the roughening process formed on the inner peripheral surface of the magnetic disk, and Fig. 9 is a top view. FIG. 2 is an explanatory diagram showing a state in which double-sided tape is inserted between a magnetic disk and an upper hub and a lower hub. 1...Case body, 2...Upper case, 3...Lower case, 4...Magnetic disk, 5...Upper hub, 6
... lower hub, 18 ... through hole, 20 ... recess, 2
2...Protrusion.

Claims

[Claims for Utility Model Registration] (1) A case body consisting of an upper case and a lower case, a magnetic disk housed in the case body, and an upper hub rotatably attached to the case body and holding the magnetic disk. and a lower hub, wherein a convex portion or a concave portion is formed on the lower surface of the upper hub, and a concave portion or a convex portion is formed on the upper surface of the lower hub at a position corresponding to the convex portion or the concave portion, respectively; A disk cassette characterized in that a through hole into which the convex part is inserted is formed at a position corresponding to the convex part of the magnetic disk. (2) The disk cassette according to claim 1, wherein the convex portion is heat-welded within the concave portion. (3) The disk cassette according to claim 2, wherein the thermal welding means is ultrasonic welding.