JPS6320781A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To reduce power consumption and produced dust and to improve reliability, by locking a head positioning movable member at a fixed place with the magnetic force of an iron piece attached to the positioning movable member and a magnet attached to the outside of a housing. CONSTITUTION:An iron piece 1 is attached to a coil part 9 fixed to a movable body. Then a magnet 15 is attached to the outside of a housing in a transport time when an impact is applied from the outside. The piece 14 is attracted toward an arrow head 22 by the magnetic force of the magnet 15 and therefore the body 3 is locked. Thus a head 7 and a disk 2 are never injured despite the applied impacts. In an action time, the magnet 15 is removed from the outside of the housing 1 and the lock of the body 3 is released. Thus the body 3 can freely rotate around a shaft 10 and the head 7 attached to the body 3 has a reciprocation motion toward an arrow head 20 against a revolving disk 2 fixed to a disk drive motor 6 to perform the recording/reproducing actions.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for holding a movable head positioning member of a magnetic disk device.

[Conventional technology]

Is Photo 2 a row of conventional magnetic disk drives? FIG. With respect to the disk 2 which is fixed to the disk drive motor 6 and rotates, the head 7 for recording and reproducing is fixed to the movable body 3 and rotates and reciprocates in the direction of arrow a]20 in the figure around the shaft 10i. ! The movable body drive motor consists of a magnetic circuit Ig8 and a coil portion 9, and the coil portion 9 is fixed to the movable head 3 and is electrically driven in the direction of the circular arrow 21 in the figure to access the head 7. Coil part 9 fixed to movable body 3
Buffer bodies 12 and 13 whose two sides are separate bodies, respectively.
By coming into contact with the disk 2, the movable range of the head 7 relative to the disk 2 is limited. During transportation, an electromagnet 35 (near) plunger is fixed to the body 1 to hold the movable body so that the movable body 3 does not move due to external shocks and damage the bed 7 and the disk 2. 36
When the power is not energized, the μ connecting dragon moves in the direction of the arrow head 37, and when the power is not energized, it engages with the protrusion 38 of the movable body 3 to hold and fix the movable body 3.

[Problems that the invention is supposed to solve]

However, with the above-mentioned conventional technology, it is necessary to adjust the mounting position during assembly, consumes a lot of power, and has a large number of parts, which not only makes assembly difficult, but also causes dust generation. is intended to solve these problems, and its purpose is to provide a highly reliable magnetic disk device with low power consumption and low dust generation.

[Means for solving problems]

A magnetic disk device of the present invention includes a disk drive motor, a disk that is fixed to the motor and rotates, a head that is fixed to a movable head positioning member and that moves approximately radially above the disk to perform recording and reproduction, and the disk. In magnetic disk IT, which is purchased from a drive motor, a disk, a head filling movable member, and a casing that seals the head, during transportation, an iron piece attached to the head positioning movable member and a mounting plate are attached to the outside of the casing. The movable member is locked in a fixed place by a magnet and a chisel.

[Implementation row]

FIG. 1 is a plan view showing an actual Is array of a magnetic disk device according to an embodiment of the present invention. An iron piece 14 is attached to the nine coil portion 9 which is fixed to the movable body 3. A magnet 15 is attached to the outside of the casing 1 during transportation when an external shock is applied.

Since the iron piece 14 is attracted in the direction of the arrow n by the magnetic force of the magnet 15, the movable body 3 is locked and will not move even if an impact is applied, and the head 7 and disk 2 will not be damaged. During operation, when the magnet 15 attached to the outside of the housing 1 is removed and the lock is released, the movable body 3 becomes free to rotate around the axis 1 ( ), and the movable body 11
The head 7 attached to the disk drive motor 6 is fixed to the disk drive motor 6 and makes a reciprocating motion in the direction of arrow I with respect to the rotating disk 2 for recording and reproduction. :conduct.

〔Effect of the invention〕

As described above, according to the present invention, since there is no dust source inside, there are no problems such as dust generation, and since the number of parts is reduced, assembly is easy and costs can be reduced. 'Also, there is no need to adjust the plunger mounting position during assembly, which reduces power consumption. Even when unlocking, there is an effect that it is only necessary to remove the magnet attached to the outside of the casing.

[Brief explanation of the drawing]

Is Figure 1 an example of the magnetic disk device of the present invention? A plan view shown. FIG. 2 is a plan view showing one row of conventional magnetic disk devices. 1...Casing 21, Disk 3...Movable body 7 Pot 1 Head 9...Coil portion 14...Iron piece 15Φ, fist magnet or more Applicant: Seiko Epson Company Representative Patent Attorney Mogami' Tsutomuike 1 person"・ 1,! Figure 1

Claims (1)

[Claims] A disk drive motor, a disk that is fixed to the motor and rotates, a head that is fixed to a movable head positioning member and moves approximately radially over the disk to perform recording and reproduction, the disk drive motor, the disk, and a movable head positioning member. In a magnetic disk drive consisting of a casing that seals the head, during transportation, the movable member is held in a fixed place by the magnetic force between the iron piece attached to the head positioning movable member and the magnet attached to the outside of the casing. A magnetic disk device characterized by locking.