JPS63193246U - - Google Patents

Description

【図面の簡単な説明】[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図は第２
図の−線断面図、第２図は回転板を除去した
平面図、第３図は第２図の−線断面図、第４
図は第２図の正面図、第５図は同じく裏面図、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−線断面図、第１０図は
受台で改良した図で、第７図相当図、第１１図は
第１０図の動作説明図である。 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は凹所である。なお、図中同
一符号は同一又は相当部分を示す。 1 to 5 are diagrams showing one embodiment of the disk rotation drive device according to this invention, and FIG.
Figure 2 is a plan view with the rotating plate removed; Figure 3 is a cross-sectional view taken along the line - in Figure 2;
The figure is a front view of FIG. 2, FIG. 5 is a back view, and FIGS. Figure 8 is a plan view with the rotary plate removed, Figure 9 is a cross-sectional view taken along the line - of Figure 8, Figure 10 is a diagram improved with a pedestal, and is equivalent to Figure 7. FIG. 11 is an explanatory diagram of the operation of FIG. 10. 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 is a recess. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 板状の記録媒体に固着され中央部に電動機の回
転軸の先端が遊嵌される中心穴を有しかつ上記中
心穴に対して偏心した位置に窓穴を有する回転板
と、この回転板に対応して空隙を隔てて配置され
上記回転軸に固定された永久磁石からなる受台と
、この受台の裏面に配置され上記受台から突出し
た支持軸に軸方向へも変位可能に枢持された強磁
性材からなる腕板と、この腕板の他端に支持され
上記腕板が上記受台に当接した状態で上記受台を
貫通突出して上記回転板の窓穴に係合して移動す
る駆動ピンと、上記受台に設けられ上記腕板と係
合して上記駆動ピンを上記回転軸の半径方向へ付
勢する弾性体とを備え、上記受台と上記回転板の
空隙の内上記腕板が配置された部分の空隙を他の
部分の空隙よりも大にしてなるデイスクの回転駆
動装置。 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 a position eccentric to the center hole; A pedestal made of a permanent magnet arranged with a corresponding gap in between and fixed to the rotating shaft, and a supporting shaft arranged on the back side of the pedestal and protruding from the pedestal so as to be pivoted so as to be movable in the axial direction. an arm plate made of a ferromagnetic material, the arm plate being supported by the other end of the arm plate and projecting through the pedestal with the arm plate in contact with the pedestal and engaging with the window hole of the rotary plate; and an elastic body provided on the pedestal and engaged with the arm plate to bias the driving pin in the radial direction of the rotating shaft, A disk rotation drive device in which a gap in a portion where the arm plate is disposed is larger than gaps in other portions.