JPH0476659U

JPH0476659U -

Info

Publication number: JPH0476659U
Application number: JP11730490U
Authority: JP
Priority date: 1990-11-08
Filing date: 1990-11-08
Publication date: 1992-07-03

Description

[Brief explanation of the drawing]

第１図は本考案の第一の実施例を示す斜視図、
第２図は本考案の第二の実施例を示す斜視図、第
３図は従来の磁気ヘツド駆動装置の一例を示す斜
視図である。１，２１，４１……ポジシヨナアーム、２，２
２，４２……磁気ヘツド、３，２３，４３……ホ
ルダ、４，２４，４４……スピンドル、５，２５
，４５……シヤフト、６，２６，４６……カツプ
リング、７，２７，４７……ロータリエンコーダ
、８，２８，４８……円弧面、９，１０，２９，
３０，４９，５０……ベルト、１１，３１，５１
……出力軸、１２，３２，５２……パルスモータ
、５３……スプリング、５４……スライダ。 FIG. 1 is a perspective view showing a first embodiment of the present invention;
FIG. 2 is a perspective view showing a second embodiment of the present invention, and FIG. 3 is a perspective view showing an example of a conventional magnetic head drive device. 1, 21, 41...Positioner arm, 2, 2
2, 42... Magnetic head, 3, 23, 43... Holder, 4, 24, 44... Spindle, 5, 25
, 45... Shaft, 6, 26, 46... Coupling, 7, 27, 47... Rotary encoder, 8, 28, 48... Arc surface, 9, 10, 29,
30, 49, 50...Belt, 11, 31, 51
... Output shaft, 12, 32, 52 ... Pulse motor, 53 ... Spring, 54 ... Slider.

Claims

[Claims for Utility Model Registration] 1. A positioner arm having a center of rotation at one end and an arcuate portion of approximately 45 degrees at the other end, and a magnetic head fixed at the tip of the positioner arm fixed near the center of rotation. a holder, a spindle having upper and lower bearings for rotating the positioner arm, a rotary encoder that is connected concentrically to the shaft of the spindle via a coupling and measures the rotation angle of the positioner arm, and a rotary encoder that is provided outside the positioner arm and that rotates the positioner arm. a pulse motor having an output shaft disposed with a slight gap between the output shaft and the side surface of the arcuate portion of the positioner arm; a first belt extending in one direction and having the other end fixed to the side surface of the arcuate portion; and one end wrapped around the output shaft of the pulse motor and extending in the opposite direction to the first belt. a second belt whose other end is fixed to a side surface of the arcuate portion, the distance from the rotation center of the arcuate portion of the positioner arm is maximized at the center of the arcuate portion, and the distance is directed toward both ends. A magnetic head drive device characterized in that the magnetic head is gradually decreased. 2. A positioner arm having a rotational center at one end and an approximately 45-degree circular arc at the other end, a holder fixed near the rotational center of the positioner arm and having a magnetic head attached to its tip, and bearings at the top and bottom. a spindle that rotates the positioner arm; a rotary encoder that is connected concentrically to the shaft of the spindle via a coupling ring and measures the rotation angle of the positioner arm; a pulse motor disposed with a slight gap from the side surface of the arcuate portion, and a pulse motor having one end wound around the output shaft of the pulse motor and extending in one direction of the side surface of the arcuate portion of the positioner arm; a first belt having one end fixed to the side surface of the arc-shaped part; one end wrapped around the output shaft of the pulse motor and extending in the opposite direction to the first belt; and the other end fixed to the side of the arc-shaped part. A second belt fixed to a side surface, a slider for horizontally movably holding the pulse motor, and a spring for pulling the pulse motor in the direction of the shaft of the spindle. Magnetic head drive device.