JPH05159504A - Magnetic disc device with retreat position lock unit - Google Patents

Abstract

PURPOSE:To eliminate power consumption for unlocking at the time of driving a magnetic disc by obviating the necessity of solenoid in the retreat position locking operation. CONSTITUTION:A head arm 2 having a magnetic head 1 is held rotatably on a bearing 3 and the magnetic head 3 rotates through a voice coil motor 4 between the innermost and outermost circumferences of a magnetic disc (not shown). When a magnetic disc unit is not used, the head arm 2 is carried to a retreat position at an innermost circumference and the magnetic disc is stopped. A resilient stop means 7 stopping in response to the innermost circumference of the magnetic disc is disposed between the head arm 2 and the fixed side. A constricted protrusion 7a on the head arm 2 side and two sides 7b of a U-shaped resilient body on the fixed side constitute the resilient stop means 7. When the head arm 2 is carried to the retreat position at the innermost circumference, the resilient stop means 7 locks the head arm 2 resiliently at the retreat position and the head arm 2 is unlocked subsequently upon operation of the magnetic disc unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk device provided with a retracting position locking device for locking a head arm to which a magnetic head of a magnetic disk device is attached at a retracted position such as the innermost circumference of the magnetic disk.

[0002]

2. Description of the Related Art A conventional magnetic disk device provided with a retracting position locking device is provided with a solenoid plunger that moves in and out at a direction substantially perpendicular to the direction of rotation of a pin provided on a head arm, and when the magnetic disk is not in use, it is at the retracted position. The magnetic head is locked by releasing and projecting the plunger, and when the magnetic disk is driven, the solenoid is excited to pull in the plunger to release the lock.

[0003]

In the above-mentioned conventional technique, when the magnetic disk is driven, the solenoid is excited to consume electric power, and the solenoid itself is expensive.

An object of the present invention is to provide a magnetic disk device provided with a mechanical retract position locking device that does not use a solenoid for locking the retract position and does not consume power for unlocking when the magnetic disk is driven. To do.

[0005]

A magnetic disk device including a retracted position locking device of the present invention is a magnetic disk device including a rotatable head arm and a magnetic head and a voice coil motor. Between the side and the side, elastic locking means for locking corresponding to the retracted position of the magnetic head is provided. At this time, one of the elastic locking means locks the other side by two sides of the U-shaped elastic body, or locks the other side by one side of the U-shaped elastic body.

[0006]

In this invention group, reference is made to FIG. When the head arm 2 is carried to the retracted position at the innermost periphery when the magnetic disk device is not used, the elastic locking means 7 (7a, 7b) elastically locks the head arm 2 at the retracted position, and the magnetic disk device is When driving, the lock is released and the lock is released. The same applies to the elastic locking means 17 (17a, 17b).

[0007]

1 is a plan view showing the rotation of a magnetic disk device according to a first embodiment, and FIG. 2 is a front view of a lock device according to a second embodiment. In FIG. 1, a head arm 2 having a magnetic head 1
Is rotatably held by bearings 3, and voice coil motor 4
As a result, the magnetic head 1 rotates between the innermost circumference and the outermost circumference of a magnetic disk (not shown). Crash stops 6a and 6b are arranged corresponding to the innermost circumference and the outermost circumference. When the magnetic disk device is not used, the head arm 2 is moved to the retracted position on the innermost circumference, and the magnetic disk stops.

The above structure is approximately the same as the conventional example.
As a characteristic structure of the embodiment, an elastic locking means 7 is provided between the head arm 2 and the fixed side to lock the magnetic disk in correspondence with the retracted position. The constricted projection 7a on the head arm 2 side and the two sides 7b of the U-shaped elastic body on the fixed side constitute the elastic locking means 7, but the head arm side and the fixed side may be interchanged. With this structure, when the head arm 2 is moved to the innermost retracted position when the magnetic disk device is not in use, the elastic locking means 7 causes the head arm 2 to move.
Is elastically locked at the retracted position, and when the magnetic disk device enters into operation and the head arm 2 moves, the lock is released and the lock is released. In the second embodiment shown in FIG. 2, one of the elastic locking means 17 is locked to one side 17b of the V-shaped elastic body, and the other is a pin 17a perpendicular to the rotating direction of the head arm 2. The operation is the same as in the first embodiment.

[0009]

According to the present invention, there is provided a magnetic disk device having a retracted position locking device, wherein a rotatable head arm is provided with a magnetic head and a voice coil motor. In addition, elastic locking means for locking corresponding to the retracted position of the magnetic head is provided. At this time, one of the elastic locking means locks the other side by two sides of the U-shaped elastic body, or locks the other side by one side of the U-shaped elastic body.

According to this structure, when the head arm is moved to the retracted position on the innermost circumference when the magnetic disk device is not used, the elastic locking means elastically locks the head arm at the retracted position, and When the disk device is put into operation, the lock is released and the lock is released. Therefore, the solenoid is not used for locking the retracted position, and there is no power consumption for unlocking the magnetic disk when it is driven. .. The invention 2 or the invention 3 has an effect that the elastic locking means is embodied.

[Brief description of drawings]

FIG. 1 is a plan view illustrating a rotation of a magnetic disk device according to a first embodiment.

FIG. 2 is a front view of a lock device according to a second embodiment.

[Explanation of symbols]

 1 Magnetic Head 2 Head Arm 3 Bearing 4 Voice Coil Motor 7 Elastic Locking Means 7a Projection 7b Two Sides of U-Shaped Elastic Body 17 Elastic Locking Means 17a Pin 17b One Side of Hexagonal Elastic Body

Claims (3)

[Claims] 1. A magnetic disk device comprising a rotatable head arm having a magnetic head and a voice coil motor, and an elastic member which is locked between the head arm and a fixed side in correspondence with a retracted position of the magnetic head. A magnetic disk device comprising a retracted position locking device, characterized in that locking means is provided. 2. A magnetic disk device comprising the retracted position locking device according to claim 1, wherein one of the elastic locking means locks the other at two sides of a U-shaped elastic body. A magnetic disk device including a lock device. 3. A retracted position according to claim 1, wherein one of the elastic locking means locks the other at one side of the V-shaped elastic body. A magnetic disk device including a lock device.