JPH01154564U

JPH01154564U -

Info

Publication number: JPH01154564U
Application number: JP5005888U
Authority: JP
Priority date: 1988-04-14
Filing date: 1988-04-14
Publication date: 1989-10-24

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図乃至第１０図は本考案の実施例を示し、
第１図はヘツド駆動装置の斜視図、第２図はヘツ
ド駆動装置の平面図、第３図は第２図のＡ―Ａ線
断面図、第４図及び第５図はカムとボールベアリ
ングの平面図、第６図はカムの回転角と半径との
関係を示す特性線図、第７図はカムの回転角とヘ
ツドの変位量の関係を示す特性線図、第８図はフ
オトカプラーの出力とヘツドの変位量の関係を示
す特性線図、第９図はヘツド駆動回路のブロツク
図、第１０図はＣＰＵのフローチヤート図であり
、第１１図乃至第１３図は従来例を示し、第１１
図はヘツド駆動装置の平面図、第１２図はカムの
平面図、第１３図はカムの回転角と半径との関係
を示す特性線図である。３０…微動モータ（モータ）、３６…カム、３
６ａ…カム面、３７…ボールベアリング（被伝達
部）、３９…ヘツド位置検出素子、４３…ＣＰＵ
（モータ制御部）。 1 to 10 show embodiments of the present invention,
Fig. 1 is a perspective view of the head drive device, Fig. 2 is a plan view of the head drive device, Fig. 3 is a sectional view taken along line A--A in Fig. 2, and Figs. 4 and 5 show the cam and ball bearing. 6 is a characteristic diagram showing the relationship between the rotation angle of the cam and the radius, FIG. 7 is a characteristic diagram showing the relationship between the cam rotation angle and the displacement of the head, and FIG. FIG. 9 is a block diagram of the head drive circuit, FIG. 10 is a flowchart of the CPU, and FIGS. 11 to 13 show conventional examples. 11th
12 is a plan view of the head driving device, FIG. 12 is a plan view of the cam, and FIG. 13 is a characteristic diagram showing the relationship between the rotation angle and radius of the cam. 30... Fine movement motor (motor), 36... Cam, 3
6a...Cam surface, 37...Ball bearing (transmitted part), 39...Head position detection element, 43...CPU
(Motor control section).

Claims

【実用新案登録請求の範囲】モータ制御部によつて駆動制御される微動モー
タをヘツドキヤリツジに設け、前記微動モータに
よつて回転されるカムで前記ヘツドキヤリツジに
対してヘツドを相対変位させてヘツドの微調整ト
ラツキングを行うようになつているヘツド駆動装
置において、前記ヘツドキヤリツジには、ヘツドの変位量を
光学的或は電気的に検出するヘツド位置検出素子
を設けたことを特徴とするヘツド駆動装置。[Claims for Utility Model Registration] A fine movement motor that is drive-controlled by a motor control section is provided in the head carriage, and a cam rotated by the fine movement motor displaces the head relative to the head carriage to finely move the head. 1. A head drive device adapted to perform adjustment tracking, characterized in that the head carriage is provided with a head position detection element for optically or electrically detecting the amount of displacement of the head.