JPH0412146U

JPH0412146U -

Info

Publication number: JPH0412146U
Application number: JP4935290U
Authority: JP
Priority date: 1990-05-11
Filing date: 1990-05-11
Publication date: 1992-01-31

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の円盤状記録媒体保
持機構の縦断面図で、第１図１はクランプ機構、
第１図２は円盤状記録媒体を保持機構の上にのせ
た状態、第２図は円盤状記録媒体をクランプした
後の縦断面図、第３図は従来例の円盤状記録媒体
保持機構の縦断面図である。１……ターンテーブル、１ａ……当り面、１ｂ
……底面、１ｃ……ストツパ、１ｄ……内壁、１
ｇ……凹部、２……回転軸、２ａ……中心孔、３
……デイスクセンタリングハブ、３ｂ……テーパ
面、３ｃ……第１の貫通孔、３ｄ……底板、３ｅ
……第２の貫通孔、４……鉄板、４ｂ……スペー
サ部材、５……スプリング、６……スプリング、
７……デイスクサポート、７ａ……円筒部、７ｂ
……上端面、７ｃ……底板、７ｄ……貫通孔、８
……円筒状記録媒体、８ａ……中心孔、９……ヨ
ーク、９ａ……ガイド穴、１０……クランパ、１
０ａ……クランパリング、１１……磁石、１２…
…クランプ機構。 FIG. 1 is a longitudinal sectional view of a disk-shaped recording medium holding mechanism according to an embodiment of the present invention, and FIG.
Fig. 1 and 2 show a state in which a disc-shaped recording medium is placed on the holding mechanism, Fig. 2 is a vertical cross-sectional view after the disc-shaped recording medium has been clamped, and Fig. 3 shows a conventional disc-shaped recording medium holding mechanism. FIG. 1... Turntable, 1a... Hit surface, 1b
...Bottom, 1c...Stopper, 1d...Inner wall, 1
g...Recess, 2... Rotating shaft, 2a... Center hole, 3
... Disc centering hub, 3b ... Tapered surface, 3c ... First through hole, 3d ... Bottom plate, 3e
...Second through hole, 4...Iron plate, 4b...Spacer member, 5...Spring, 6...Spring,
7...Disk support, 7a...Cylindrical part, 7b
...Top end surface, 7c...Bottom plate, 7d...Through hole, 8
... Cylindrical recording medium, 8a ... Center hole, 9 ... Yoke, 9a ... Guide hole, 10 ... Clamper, 1
0a... Clamper ring, 11... Magnet, 12...
...Clamp mechanism.

Claims

[Claims for Utility Model Registration] It has a generally cylindrical shape with an open top end, and a bottom surface is provided with a first through hole passing through the center of the bottom surface and a second through hole eccentric to the first through hole, and the outer peripheral surface is connected to the top end. The diameter increases from the top toward the bottom end, forming a tapered shape into which the center hole of the disc-shaped recording medium fits, and the rotating shaft of the motor fits into the first through hole, allowing sliding on the rotating shaft. a disk centering hub having a center hole, and a cylindrical recess that is larger than the diameter of the outer circumference of the disk centering hub and concentric with the center hole on an end surface opposite to the motor, and the rotating shaft is located at the center of the center hole. a turntable extending through the hole and rotated by the rotating shaft; an outer diameter smaller than the inner diameter of the disk centering hub; The iron plate is located at a spacer member parallel to the axis; and a spring disposed between the turntable and the disc centering hub so as to surround the rotating shaft and press the inner bottom surface of the disc centering hub against the bottom surface of the iron plate. , a cylindrical disk support whose inner diameter is larger than the outer diameter of the disk centering hub, at least a portion of the outer peripheral surface of which fits into the recess of the turntable, and is movable in the axial direction; and an upper part of the disk support. a stopper that limits the position; a spring that is disposed in the recess of the turntable to surround the rotating shaft and constantly presses the disk support against the stopper; and a center hole into which the rotating shaft fits. It has a magnet that attracts the yoke and the iron plate, the disk centering hub fits into the circular center hole, and the disk-shaped recording medium supported on the end surface of the disk support is held so that the rotation axis is at the center of the yoke. a clamp mechanism that fits into the hole, the magnet attracts the iron plate, and presses the disk-shaped recording medium until it abuts on the end surface of the turntable; When under pressure,
The height of the disk-shaped recording medium is determined so that the center hole of the disk-shaped recording medium almost touches the outer peripheral surface of the taper of the disk centering hub, and the lower surface of the disk-shaped recording medium comes into contact with the upper end surface of the disk support. A disc-shaped recording medium holding mechanism.