JPS62241185A - Magnetic disk driving device - Google Patents

Abstract

PURPOSE:To attain the minute adjustment and to improve the workability by using an adjusting screw so as to adjust the light shielding plate provided on a carriage thereby position a track phiphi. CONSTITUTION:A photointerrupter 17 to detect the track phiphi is screwed to a cahssis, and the light shielding plate 18 to interrupt the light of a light emitting element of the photointerrupter 17 is inserted to an arm 20 provided to a spring retainer 19 at the rear side of the carriage and moved in the inner and outer circumference of the track by the adjusting screw 21 to adjust the track phiphi. This adjustment is executed by the adjusting screw 21 and the head 23 of the screw 21 is fixed to a square hole 22 provided to the retaining arm 20 and the light shield plate 18 is moved along the collar 24 of the arm 20 by turning the adjusting screw 21.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk drive device, and particularly relates to positioning adjustment of a track ψψ.

[Conventional technology]

Generally, a magnetic disk drive device includes a magnetic disk at the tip of a carriage, and the carriage and a stepping motor are connected by means such as a steel belt, and the carriage moves in parallel along the surface of the magnetic disk. The configuration in which the magnetic head is positioned on a prescribed track on a magnetic disk is well known from Japanese Patent Publication No. 123911/1983. A magnetic disk drive device having such a configuration uses a photointerrupter, which is a track ψψ sensor, and a light shielding plate to position the track ψψ so that the magnetic head attached to the carriage can accurately move to a predetermined position. Generally, the light shielding plate is integrally formed with the carriage to move the photointerrupter, but no consideration has been given to the ease of adjustment work.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology does not take into account the workability of adjusting the positioning of the track ψψ, and it is difficult to make fine adjustments.
Adjustment took a considerable amount of time and there were problems with workability.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a magnetic disk drive device that can adjust the track ψψ to an accurate position.

[Means for solving problems]

The above object is achieved by fixing a photointerrupter for detecting the track ψψ to the chassis and adjusting the light shielding plate provided on the carriage by moving it in the direction in which the carriage moves.

[Effect]

The track ψψ was adjusted by moving the photo-interrupter, but by fixing the photo-interrupter to the chassis,
By moving the light shielding plate provided on the carriage in the direction in which the carriage moves using an adjustment screw, fine adjustment can be made and the position can be easily adjusted to an accurate position.

[Embodiments of the invention]

Examples will be described below based on the drawings.

1 is a chassis to which each component of the device is attached.

Further, a drive device 4 for rotating a magnetic disk 3 built into the cassette 2 is attached to the center of the chassis.

A hub receiver 7 on which a hub 6 provided at the center of the magnetic disk 3 is placed is provided on the shaft 5 directly connected to the drive bag @4.

The cassette storage body 8 into which the cassette set 2 is inserted is placed in the chassis 1.
The cassette storage body 8 is configured so that it can be moved up and down through a guide hole 9 provided on the side surface of the cassette storage body 8.
This shows a state in which the object has fallen downward.

On the other hand, 10 is a carriage, and a lower magnetic disk 11 for writing and reading data on the magnetic disk 3 is provided at the tip of the carriage 10. Further, an upper magnetic head 12 is provided at the tip of a helad arm 13 in order to write and read data on both sides of the magnetic disk 3 by inserting the cassette 2 once.

The carriage 10 and the helad arm 13 are fitted with a feed cam 14 provided on the side of the carriage and a screw 16 cut into the shaft of the stepping motor 15, so that the carriage 10 and the helad arm 13 are connected to a concentric recording band formed on the magnetic disk 3. It is configured to move along the

Here, the track ψψ adjustment method according to the present invention will be described.

A photointerrupter 17 for detecting the track ψψ is screwed to the chassis 1.
A light shielding plate 16 for blocking light from the light emitting element 7 is inserted into an arm 20 provided on a spring retainer 19 at the rear of the carriage, and is moved by an adjusting screw 21 in the inner and outer circumferential directions of the track.

The track ψψ is adjusted. The head of the adjustment screw 21 is fixed to a square hole 22 provided in the arm 20 of the spring holder, and by turning the adjustment screw 21, the light shielding plate 18 moves along the collar 24 of the arm 20. be.

The adjustment screw will now be explained.

The groove 21a of the driver of the adjusting screw 21 is made about 2 to .beta. times deeper than the normal depth to ensure good engagement so that no directional force is applied when tightening.

In addition, in order to make the seek part as light as possible, AQ material or plastic is used as the material.

Further, the length of the threaded portion is made longer than the width of the light shielding plate 18 to improve the ease of assembly, so that the light shielding plate 18 is stabilized.

In addition, in order to eliminate swinging of the light shielding plate 18, as shown in FIG.
8 is forcibly lifted upwards to prevent it from swinging vertically.

Further, the swinging in the left and right direction is done by eliminating rattling between the square hole 22 of the spring presser 19 and the head of the adjustment screw 21 to prevent swinging in the left and right direction.

〔Effect of the invention〕

According to the present invention, when positioning the track ψψ, fine adjustment is possible by aligning the light shielding plate provided on the carriage with the adjusting screw, and the accurate position can be easily adjusted, improving work efficiency. can be achieved.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIGS. 1 and 2 are enlarged exploded perspective views of essential parts, and FIG. 3(a). (b) is an enlarged cross-sectional view of the main part, Figure 4 is a top view of the entire device,
FIG. 5 is a longitudinal sectional view of the entire device, and FIG. 6 is a side view of the entire device. DESCRIPTION OF SYMBOLS 1... Chassis, 2... Carriage, 17... Photointerrupter, 18... Light shielding plate, 19... Spring holder, Fig. 1 if, 3fjJ z6 Fig.

Claims (1)

[Claims] 1. A drive device for rotationally driving a magnetic disk, a magnetic head for writing and reading data on the magnetic disk, provided above and below or on one side of the carriage, and a hub holder provided at the tip of the drive device. In the magnetic disk drive device in which the cassette is installed, the track ψψ sensor is used to position the track ψψ, and the light shielding plate is used to block the light from the light emitting element. A magnetic disk drive device characterized by the ability to make fine adjustments using an adjustment screw. 2. The magnetic disk drive device according to claim 1, wherein the light shielding plate is easily attached to a spring holder provided on the carriage using an adjustment screw. 3. In claim 2, the adjustment screw is
In order to eliminate play due to the gap between the light shielding plate and the spring holder, the center of the screw hole in the light shielding plate and the center of the adjustment screw are shifted by θ, so that the light shielding plate can move while closely contacting the spring holder. Magnetic disk drive.