JPH04341982A - Disk device - Google Patents

Abstract

PURPOSE:To drive a shipping lock mechanism of a pickup and a CSS-free mechanism, etc., by wind force discharged from a turbofan. CONSTITUTION:The device is constituted in such a manner that turbine blades 11 of the turbofan 9 are rotatively driven by a spindle motor 2 for rotatively driving a discoid recording medium 4, and wind force utilizing operation mechanisms of the shipping lock mechanism and the CSS-free mechanism, etc., are driven by a high pressure wind discharged from the turbofan 9.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device suitable for application to, for example, a hard disk device.

0002

[Prior Art] Conventionally, hard disk drives have a shipping lock mechanism (a mechanism that locks the pickup arm at the outermost or innermost position of the hard disk when the rotation of the hard disk stops) and a CSS free mechanism (a mechanism that locks the pickup arm at the outermost or innermost position of the hard disk when the rotation of the hard disk stops). A mechanism for floating the magnetic head slider of the pickup arm to a position sufficiently separated from the recording surface of the hard disk is applied.

0003

However, the conventional shipping lock mechanism and CSS free mechanism use a dedicated power source such as a plunger solenoid or a DC motor, which is expensive. In addition, the shipping lock mechanism and CSS free mechanism must be operated before the power is turned off and the hard disk stops rotating, and plunger solenoids and DC motors consume large amounts of power. There were problems with drive systems using plunger solenoids and DS motors.

The present invention has been made to solve the above problems, and aims to provide a disk device that does not require a plunger solenoid, DC motor, etc. to drive the shipping lock mechanism or CSS free mechanism. This is the purpose.

[0005]

[Means for Solving the Problems] A disk device of the present invention for achieving the above object includes a spindle motor for rotationally driving a disk-shaped recording medium, and a turbo fan having a turbine blade rotationally driven by the spindle motor. and a wind power operating mechanism driven by high-pressure wind discharged from the turbo fan.

[0006]

[Operation] In the disk device of the present invention configured as described above, when the spindle motor rotationally drives the disk-shaped recording medium, the turbine blades of the turbofan are simultaneously rotationally driven, and high-pressure air is discharged from the turbofan. Ru. This high-pressure wind power can drive a wind power operating mechanism such as a shipping lock mechanism or a CSS free mechanism with a sufficiently strong driving force.

[0007]

Embodiments Hereinafter, embodiments in which the present invention is applied to a hard disk drive will be described with reference to the drawings.

First, a first embodiment will be explained with reference to FIGS. 1 to 4. A spindle motor 2 is mounted on a chassis 1 which also serves as a sealed case, and a spindle motor 2 is configured such that a pair of upper and lower hard disks 4, which are disk-shaped recording media, are integrally driven to rotate at high speed in the direction of arrow a, for example, by the motor hub 3. . Further, a pickup arm 6 attached to the chassis 1 via an arm shaft 5 is configured to be swing-driven in the direction of arrow b by a voice coil motor (not shown). Then, both the upper and lower recording surfaces 4a of the pair of upper and lower hard disks 4 are recorded and/or reproduced by a plurality of magnetic head sliders 7, which are heads attached to the tip of the pickup arm 6 via a plurality of load beams 6a made of plate springs. is configured to be

A turbo fan 9 is mounted on the outer periphery of the central cylindrical portion 3a of the motor hub 3 between a pair of upper and lower hard disks 4. This turbo fan 9 has a turbine blade 11 integrally formed with an annular spacer 10 that is fitted onto the outer periphery of a central cylindrical portion 3a and rotates together with the motor hub 3, and the outer periphery of the turbine blade 11 is surrounded by an annular turbo outer casing. It is covered with 12. Note that the turbo outer casing 12 is fixed onto the chassis 1 via a plurality of stays 13 with a plurality of screws 14. Further, a pair of upper and lower hard disks 4 are connected to each other by an annular spacer 1 on the outer periphery of the central cylindrical portion 3a.
The pair of upper and lower hard disks 4 and the annular spacer 10 are fastened together and fixed to the motor hub 3 by a disk holding plate 16 that is fitted above and below the central cylinder part 3a and fixed by a plurality of screws 15 to the upper end of the central cylindrical part 3a. Then, the plurality of air intake ports 17 formed in the disk holding plate 16 are connected to the air passages 18 formed on the outer periphery of the central cylindrical portion 3a and communicated with the inner periphery of the turbo outer casing 12. An air discharge port 19 is provided at the tip of the air discharge nozzle 12a extending from the air discharge nozzle 12a.
is formed.

A shipping lock mechanism 21 is used as the wind power operating mechanism. That is, a lock lever 22 that locks the pickup arm 6 at the outermost circumferential position of the hard disk 4 shown by the solid line in FIG.
The lock lever 22 is rotatably attached in the directions of arrows c and d via the lock lever 22, and the lock lever 22 is biased to rotate in the direction of the arrow c by a tension spring 24 serving as a biasing means. The lock lever 22 is formed into a substantially L-shape, and has a lock claw part 26 at both ends that engages with the engaging part 25 of the pickup arm 6 to lock the pickup arm 6, and a lock claw part 26 that locks the pickup arm 6. A wind receiving plate 27 is formed in which the discharge port 19 is located close to the wind receiving plate 27 .

According to this first embodiment, when the hard disk 4 is rotated at high speed in the direction of arrow a by the motor hub 3 of the spindle motor 2 during recording and/or reproduction, the motor hub 3 drives the turbine of the turbo fan 9. The blade 11 is also rotated at high speed in the direction of arrow a at the same time.

Then, air is drawn into the turbo outer casing 12 in the direction of arrow e from the air intake port 17 of the turbo fan 9 through the air passage 18, and compressed air pressurized to a high pressure by the turbine blades 11, ie, High-pressure wind is discharged from the air discharge port 19 in the direction of arrow f. Then, the high-pressure wind discharged from the air outlet 19 is strongly blown against the wind receiving plate 27 of the shipping lock mechanism 21, and the high-pressure wind pressure moves the lock lever 22 from the locking position shown by the solid line in FIG. Pull the tension spring 2 to the unlocked position shown by the dashed line.
4 and is rotated in the direction of arrow d.

Therefore, at the same time as the hard disk 4 is rotationally driven by the spindle motor 2, the turbo fan 9
is activated, the lock lever 22 of the shipping lock mechanism 21 is driven by high-pressure air discharged from the air discharge port 19 of the turbo fan 9, and the lock of the pickup arm 5 is automatically released.

[0014] Next, when recording and/or playback is finished,
The spindle motor 2 is powered off, the voice coil motor is driven by the back electromotive current of the spindle motor 2, and the pickup arm 6 is moved to the outermost position (see FIG. 1).
or the innermost position). Then, at the same time as the rotation of the hard disk 4 is stopped, the rotation of the turbine blades 11 of the turbo fan 9 is also stopped, and the discharge of air from the air outlet 19 is stopped.

Then, the lock lever 22 of the shipping lock mechanism 21 is rotationally driven by the tension spring 24 from the unlock position to the lock position in FIG. Then, the pickup arm 6 is automatically locked at the outermost position (or innermost position) in FIG.

Therefore, by utilizing the high wind pressure discharged from the turbo fan 9, the shipping lock mechanism 21 is accurately synchronized with the start and stop of rotation of the hard disk 4.
The shipping lock and unlocking of the pickup arm 6 can be performed in a timely manner by driving the pickup arm 6.

Next, a second embodiment will be explained with reference to FIGS. 5 to 7. In this second embodiment, a CSS free mechanism (contact start stop free mechanism) 30 is used as the wind power operating mechanism. That is, the actuating member 31 is formed into a substantially U-shape, and is urged to move in the direction of arrow g from the outer peripheral position of each hard disk 4 by a compression spring 32 serving as an urging means. The air discharge port 19 of the turbo fan 9 is located close to the wind receiving plate 33 formed on the operating member 31 from the direction of the arrow h.

According to this second embodiment, while the hard disk 4 is not rotating, the actuating member 31 is activated by the compression spring 32 to close each pair of upper and lower load beams 6 of the pickup arm 6.
A pair of upper and lower tapered surfaces 3 are inserted between a and from the direction of arrow g.
1a, each pair of upper and lower load beams 6a made of leaf springs are pushed apart against elasticity in the direction of arrow j, which separates the upper and lower sides of the hard disk 4, and each pair of upper and lower magnetic head sliders 7 is moved as shown by solid lines in FIG. As shown, it is floated to a position sufficiently spaced from both the upper and lower recording surfaces 4a of the hard disk 4 in the direction of arrow j.

Next, during recording and/or reproduction, when the spindle motor 2 rotates the hard disk 4 and simultaneously starts the turbo fan 9, high-pressure air is discharged from the air outlet 19 of the turbo fan 9. However, CSS
The wind blows strongly against the wind receiving plate 33 of the free mechanism 30 from the direction of the arrow h.

Then, the actuating member 31 is pushed back in the direction of arrow h against the compression spring 32 from the position shown by the solid line in FIG. Run away in the direction of arrow h.

As a result, each pair of upper and lower load beams 6a
is bent in the direction of arrow i by these elastic restoring forces, and each pair of upper and lower magnetic head sliders 7 is automatically moved to a position close to both the upper and lower recording surfaces 4a of the hard disk 4, as shown by the dashed line in FIG. Once set, recording and/or playback on the hard disk 4 is performed.

Therefore, the CSS free mechanism 30 is driven by using the high air pressure discharged from the turbo fan 9 and accurately synchronized with the start and stop of rotation of the hard disk 4, and the magnetic head slider for the hard disk 4 is driven. The contact, start, stop, and free operations described in No. 7 can be performed in a timely manner.

Although one embodiment of the present invention has been described above,
The present invention is not limited to the above embodiments, and various modifications can be made based on the technical idea of the present invention. For example, the wind power operating mechanism of the present invention is not limited to the shipping lock mechanism 21 and the CSS free mechanism 30 shown in the above embodiments. Furthermore, the present invention is not limited to hard disk devices, but can be applied to various disk devices that record and/or reproduce various disk-shaped recording media.

[0024]

[Effects of the Invention] Since the disk device of the present invention is constructed as described above, it has the following effects.

When the spindle motor drives the disk-shaped recording medium, the turbine blades of the turbofan are simultaneously driven to rotate, and high-pressure wind is discharged from the turbofan, and this high-pressure wind is used to operate the shipping lock mechanism and CSS.
Since the wind power operating mechanism such as the free mechanism is configured to be driven with a sufficiently strong driving force, there is no need for a driving source such as a plunger solenoid or DC motor to drive the shipping lock mechanism or CSS free mechanism. Significant reduction in power consumption is possible.

Since the turbo fan is driven by a spindle motor that rotates the disk-shaped recording medium, a dedicated motor is not required and an inexpensive turbo fan can be obtained.

Since the turbo fan is driven by a spindle motor that rotates the disk-shaped recording medium, the wind power utilization mechanism such as the shipping lock mechanism and the CSS free mechanism can be operated at the right timing in relation to the start and stop of rotation of the disk-shaped recording medium. Can be driven.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a hard disk device according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing the turbofan of the present invention.

FIG. 3 is a plan view in horizontal section showing the turbofan of the present invention.

FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3;

FIG. 5 is a plan view showing a hard disk device according to a second embodiment of the present invention.

6 is a side view taken along arrow B-B in FIG. 5. FIG.

7 is a sectional view taken along the line CC in FIG. 6. FIG.

[Explanation of symbols]

2 Spindle motor 4 Hard disk (disk-shaped recording medium)
6 Pickup arm 7 Magnetic head slider (head) 9
Turbo fan 11 Turbine blade 12 Turbo outer casing 21 Shipping lock mechanism (wind power utilization mechanism) 22 Lock lever 27 Wind receiving plate 30 CSS free mechanism (wind power utilization mechanism) 3
1 Operating member 33 Wind receiving plate

Claims (1)

[Claims] 1. A spindle motor that rotationally drives a disk-shaped recording medium, a turbofan having turbine blades that are rotationally driven by the spindle motor, and a wind power operation that is driven by high-pressure wind discharged from the turbofan. A disk device equipped with a mechanism.