JPS6289276A - Magnetic head positioning mechanism for magnetic disk device - Google Patents

Abstract

PURPOSE:To reduce less the size of a magnetic disk device by putting a part of a carriage attaching the magnetic head into the area between the head and a magnetic disk when this head is positioned at the inner circumference of the disk. CONSTITUTION:A DC motor 4 attached with a magnetic disk 1 which records the information is provided together with a base 5 attached with the motor 4, a support 12 holding a bearing 6 on the base 5, and a carriage 7 held by the bearing 6. A magnetic head 8 which writes the information and a voice coil 10 which moves the carriage 7 are attached to the carriage 7. Then the part where the carriage 7 is held by the bearing 6 is put between the head and disk when the head moves to the inner circumferential part of the disk. Then the part of the carriage set between the head and the disk can be held by the bearing. As a result, the most exterior size of the carriage can be reduced less than the exterior form of the disk. Thus a magnetic disk device can be miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a positioning mechanism for positioning a magnetic head for reading and writing information in a magnetic disk device to an arbitrary position.

[Background of the invention]

In recent years, magnetic disk devices have been required to be smaller in size due to the miniaturization of disks, but conventional devices have been designed to reduce access by making the magnetic head seek over the disk, even though the disk itself has become smaller. Since the mechanism is placed outside the disk, it has been difficult to downsize it.

Incidentally, an example of this type of device is disclosed in Japanese Patent Application Laid-open No. 161176/1983.

[Purpose of the invention]

An object of the present invention is to eliminate the above-mentioned conventional problems, and to provide a magnetic disk device that can be made more compact.

[Summary of the invention]

As small magnetic disks become smaller and have higher performance, increasing the number of magnetic disks increases the storage capacity (although the number is limited due to external dimensions, and the structure of the magnetic head positioning mechanism increases the width). Therefore, in the present invention, in order to maximize the number of magnetic disks within the specified dimensions and to install a magnetic head positioning mechanism, we have developed a magnetic head that utilizes the space between the magnetic disks. When the magnetic head is positioned on the inner periphery of the magnetic disk, a part of the carriage to which the magnetic head is attached is placed between the disks, resulting in smaller size and higher performance.

[Embodiments of the invention]

An embodiment of this shaft light will be described below with reference to Figures 4'F1 to 4. The magnetic disk 1 on which information is recorded is provided with a spacer 2. It is fixed to the DC motor 4 by the clamp 3, and the DC motor 4
is attached to base 5. On the other hand, a support 12 with bearings 6 attached is fixed to the base 5, and the bearings 6 hold both ends of the carriage 7.
A magnetic head 8 for reading and writing information is attached directly or via a guide arm 9 to drive the carriage 7. A voice coil motor 10 is attached to both sides of the carriage 7, and a coil portion 11 of the voice coil motor 10 is fixed to the carriage 7. Coil part 11
By applying a current to the magnetic head 8, the magnetic disk 1 is
position at any position. In this carriage structure, when the magnetic head 8 is centered on the inner periphery of the magnetic disk 1, a part of the portion of the carriage 7 that contacts the bearing 6 enters between the magnetic disks, and when positioned on the outer periphery of the magnetic disk 1, The part between the magnetic disks contacts the bearing 6 and holds the carriage 7, so when the magnetic head 8 is positioned at the outermost part of the magnetic disk 1, the part that is located between the magnetic disks is the part furthest away from the outermost part of the disk. It is possible to create a compact, high-performance magnetic disk.

〔Effect of the invention〕

According to the present invention, when the magnetic head moves toward the inner circumferential side, the portion where the carriage is held by the bearing enters between the magnetic disks. When the magnetic head is positioned on the outer periphery, the part of the carriage that was between the magnetic disks can be held by bearings, so the outermost dimension of the carriage is smaller than the external size of the magnetic disk, and the bearing span in the carriage movement direction is Since the carriage can be held for a long time, the carriage can be held stably, making it possible to create a compact and high-performance magnetic disk device.

[Brief explanation of drawings]

,? Figure 1 is a front view of the magnetic disk device data storage section, Figure 2 is a right side view of Figure 1, Figure 6 is a sectional view of Figure 1, and Figure 4 is a detailed view of the carriage. 1...6 air disc, 2...spacer, 3...clamp, 4...DC motor, 5...base, 6...
- Bearing, 7... Carriage, 8... Magnetic head, 9... Guide arm, 10... Voice coil motor, 11... Coil, 12... Support.

Claims (1)

[Claims] It has a DC motor to which a magnetic disk for recording information is attached, a base to which the DC motor is attached, a support holding a bearing on the base, and a carriage held by the bearing. In the magnetic head positioning mechanism, a magnetic head for writing data is attached, and a voice coil for moving the carriage is attached to the carriage. When the carriage is parallel to the magnetic disk and the carriage moves, a part of the carriage A magnetic head positioning mechanism for a magnetic disk device that is inserted between magnetic disks and supports both ends of a carriage with bearings.