JPS63193247U

JPS63193247U -

Info

Publication number: JPS63193247U
Application number: JP8147987U
Authority: JP
Priority date: 1987-05-28
Filing date: 1987-05-28
Publication date: 1988-12-13

Description

[Brief explanation of the drawing]

第１図〜第５図はこの考案によるデイスクの回
転駆動装置の一実施例を示す図で、第１図は回転
板を除去した平面図、第２図は第１図の−線
断面図、第３図は第１図の正面図、第４図は第１
図の−線断面図、第５図は第１図の裏面図、
第６図〜第９図は従来のデイスクの回転駆動装置
を示す図で、第６図は平面図、第７図は第６図の
−線断面図、第８図は回転板を除去した平面
図、第９図は第８図の−線断面拡大図である
。図中、１は記録媒体、２は回転板、２ａは中心
穴、２ｂは窓穴、３は受台、４は回転軸、５は腕
板、６は支持軸、７は駆動ピン、８は弾性体、１
２は吸着板、１２ｂ，１２ｃは溝である。なお、
図中同一符号は同一又は相当部分を示す。 1 to 5 are views showing an embodiment of the disk rotation drive device according to this invention, in which FIG. 1 is a plan view with the rotating plate removed, FIG. 2 is a sectional view taken along the line -- in FIG. Figure 3 is the front view of Figure 1, Figure 4 is the front view of Figure 1.
Figure 5 is a back view of Figure 1,
Figures 6 to 9 are diagrams showing a conventional disk rotation drive device, where Figure 6 is a plan view, Figure 7 is a sectional view taken along the - line in Figure 6, and Figure 8 is a plane with the rotating plate removed. FIG. 9 is an enlarged cross-sectional view taken along the - line in FIG. 8. In the figure, 1 is a recording medium, 2 is a rotating plate, 2a is a center hole, 2b is a window hole, 3 is a pedestal, 4 is a rotating shaft, 5 is an arm plate, 6 is a support shaft, 7 is a drive pin, and 8 is a Elastic body, 1
2 is a suction plate, and 12b and 12c are grooves. In addition,
The same reference numerals in the figures indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

A rotary plate fixed to a plate-shaped recording medium, having a center hole in the center into which the tip of a rotating shaft of an electric motor is loosely fitted, and having a window hole at an eccentric position with respect to the center hole; A pedestal made of a permanent magnet and arranged correspondingly and fixed to the rotating shaft, and a ferromagnetic material pivotally supported to be displaceable in the axial direction on a support shaft arranged on the back side of the pedestal and protruding from the pedestal. an arm plate; and a drive pin supported by the other end of the arm plate and protruding through the pedestal with the arm plate in contact with the pedestal, engaging with and moving in a window hole of the rotary plate. ,
an elastic body provided on the pedestal to engage with the arm plate and urge the drive pin in the radial direction of the rotating shaft; a groove or a hole in the surface of the pedestal facing the arm plate; A rotary drive device for the disk provided.