JPH0369074A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To prevent damage for a magnetic head by providing a carriage locking mechanism to be engaged to a carriage when the head is in a CSS area, to move the head to an inside stopper area and to prohibit the movement of the head. CONSTITUTION:When a magnetic disk device is transported or kept, a lid 54 is turned inside out and a projection 54a is protruded to the external part of the magnetic disk device. At this time, the magnetic head 35 is positioned in the CSS area 34b of a magnetic disk 34. Then, a slider 53 is moved downward by the pushing force of a spring 55 and a groove part 40b of a dumper 40 is engaged with a pin 39. Then, the movement of the carriage 37 is prohibited. At the time of this engagement, the pin 39 is guided by the groove part 40b and moves and the magnetic head 35 is moved from the CSS area 34b to the inside stopper area 34c. Thus, the damage for the magnetic head can be prevented.

Description

Detailed Description of the Invention [Summary] A data recording area, a CSS area formed inside this data recording area, an inner stopper area formed inside this CSS area, and a CSS area formed outside the data recording area. a disk provided with an outer stopper area; a head for reading/writing data to/from the disk;
Regarding a magnetic disk drive having a carriage for moving the head to a target track on the disk and a stopper for regulating the movement range of the carriage, the magnetic disk drive has a simple configuration and can be easily moved by the magnetic head during transportation or storage of the magnetic disk drive. An object of the present invention is to provide a magnetic disk device capable of preventing the occurrence of scratches on the CSS area and further preventing the occurrence of head crashes, the head being engaged with the carriage when the head is in the CSS area. Further, a carriage lock mechanism is provided for moving the head to the inner stopper area and prohibiting movement of the carriage.

[Industrial application field] The present invention relates to a magnetic disk device.

During operation, the head of a magnetic disk device flies above the disk at a spacing of submicrons. Therefore, even a small amount of dust or a minute scratch on the disk can cause a head crash.

Therefore, there is a need for a magnetic disk device that does not cause head crashes.

[Prior Art] Next, a conventional magnetic disk device will be explained. FIG. 6 is a block diagram of a conventional magnetic disk device, and FIG. 7 is a diagram illustrating the disk surface in FIG. 6.

First, in FIG. 6, 1 is a base, and 2 is an enclosure that covers the base 1. A spindle motor 3 having a motor mechanism provided inside is mounted on the base 1. A plurality of magnetic disks 4 (three in this conventional example) are attached to this spindle motor 3. The magnetic disk 4 is rotated at a constant speed (for example, 3600 rpm) by a spindle motor.

5 is provided facing each disk surface, and the magnetic disk 4
This is a magnetic head that reads/writes data to and from the magnetic head. The magnetic head 5 is attached to a carriage 7 via a gimbal spring 6.

This gimbal spring 6 lightly urges the magnetic head 5 in the direction of the magnetic disk 4 in order to maintain stable flying relative to the magnetic disk 4 .

In FIG. 6, the carriage 7 moves on a guide 8 in the direction of arrow 1 to move the magnetic head 5 to a desired track on the magnetic disk 4. A pin 9 is attached to the lower side surface of the carriage 7.

Further, at one end of the guide 8, there is an inner stopper 11 having a damper 10 attached to the tip as a buffer material, and at the other end, an outer stopper 13 having a damper 12 attached to the tip as a buffer material. are provided for each.

These stoppers 11 and 13 are used when the carriage 7 runs out of control.
By contacting the bottle 9 of the carriage 7, further runaway is prohibited.

Next, in FIG. 7, a data recording area 14 is formed on the magnetic disk 4 in which data is recorded by the magnetic head 5. As shown in FIG. Inside this data recording area 14, the magnetic disk 4 is stored until it reaches a predetermined rotation speed from a stopped state to a predetermined rotation speed.
Conversely, a CSS region 15 is formed in which the magnetic head 5 is on standby from a predetermined rotational speed to a stopped state. Further, this CSS area 15 is also a place where the magnetic head 5 waits when the magnetic disk device is transported or stored. Further, an inner stopper region 16 is formed inside this CSS region 15, which is formed as a contraction margin for the damper 10 when the carriage 7 runs out of control and the bottle 9 comes into contact with the inner stopper 11.

Similarly, outside the data recording area 14, there is an outer stopper area 17 formed as a shrinkage margin for the damper 12 when the carriage 7 runs out of control and the pin 9 abuts the outer stopper 13.
is formed. These stopper regions 16, 17 are formed to have a width of approximately 3 to 5 IllI11 so that the dampers 10 and 12 absorb collision energy when the carriage 7 runs out of control.

Next, the operation of the above configuration will be explained. A control circuit (not shown) moves the carriage 7 along the arrow 1 in FIG. 6 so that the magnetic head 5 is positioned at the desired track on the magnetic disk.
move in the direction.

[Problems to be Solved by the Invention] In the magnetic disk device having such a configuration, the magnetic head 5 is placed on standby in the CSS area 15 when the magnetic disk device is transported or stored. Although the magnetic head 5 is lightly biased in the direction of the magnetic disk 4 by the gimbal spring 6, the magnetic head 5 may damage the CSS area 15 due to vibrations or mechanical shocks generated during transportation of the magnetic disk device. Due to the scratches generated in the CSS area 15, each time the magnetic disk 4 rotates or stops, the magnetic head 5 comes into contact with the scratches, resulting in a head crash.

As a means to prevent such scratches from occurring in the CS S 6M area 15, it is possible to use a vibration absorbing material to hold down the magnetic head 5 so that it does not flap when transporting the magnetic disk drive. The problem is that it becomes complicated and costs increase.

The present invention has been made in view of the above-mentioned problems, and its purpose is to prevent damage to the CSS area caused by a magnetic head during transportation or storage of a magnetic disk device with a simple configuration, and further, An object of the present invention is to provide a magnetic disk device that can prevent head crashes from occurring.

[Means for Solving the Problems] FIG. 1 is a diagram showing the principle of a magnetic disk device of the present invention. In the figure, 21 is a disk. This disk 21 includes a data recording area 21a, a data recording area 21a, and a data recording area 21a.
A CSS area 21b formed inside the CSS area 21b, an inside stopper area 21C1 formed inside the CSS area 21b, and an outside stopper area 21d formed outside the data recording area 21a are provided. 22 is a head that reads/writes data to/from the disk 21; 23 is a carriage that moves the head 22 to a target track on the disk 21; 24 and 25 are stoppers that restrict the movement range of the carriage 23.

A carriage lock mechanism 26 engages the carriage 23 when the head 22 is in the CSS area 21b, moves the head 22 to the inner stopper area 21c, and prohibits movement of the carriage 23.

Note that although this principle diagram shows a carriage lock mechanism 26 and a stopper 25 that serve as both, they may be provided separately.

[Function] In the magnetic disk device of the present invention, the carriage 23 moves so that the head 22 is positioned at a desired track on the disk 21.

When the head 22 is in the CSS area 21b of the disk 21, the carriage lock mechanism 26 engages the carriage 23, moves the head 22 to the inner stopper area 21c, and prohibits the carriage 23 from moving.

[Example] Next, an example of the present invention will be described with reference to the drawings. Second
3 is an explanatory diagram of the carriage lock mechanism in FIG. 2, FIG. 4 is an explanatory diagram showing the locked state in FIG. 3, and FIG. FIG. 7 is a main part configuration diagram illustrating a second embodiment.

First, a first embodiment of the present invention will be described using FIGS. 2 to 4. In FIG. 2, 31 is a base, and 32 is an enclosure that covers the base 31. On the base 31 is a spindle motor 33 with a motor mechanism provided inside.
is installed. A plurality of magnetic disks 34 (three in this conventional example) are attached to this spindle motor 33. The magnetic disk 34 is rotated at a constant speed (for example, 3600 rpm) by a spindle motor.

A magnetic head 35 is provided facing each disk surface and reads/writes data to/from the magnetic disk 34 . The magnetic head 35 is attached to a carriage 37 via a gimbal spring 36. This gimbal spring 36 lightly biases the magnetic head 35 in the direction of the magnetic disk 34 in order to maintain stable flying relative to the magnetic disk 34 .

In FIG. 2, the carriage 37 moves on a guide 38 in the direction of arrow 1 to move the magnetic head 35 to a desired track on the magnetic disk 34. Three pins are attached to the lower side of the carriage 37. Also, guide 3
A carriage lock mechanism 41 having a damper 40 as a cushioning material is provided at one end of the carriage 8. Guide 3
8 is provided with an outer stopper 43 having a damper 42, which also serves as a cushioning material, attached to its tip. When the carriage 37 runs out of control, these dampers 40 and 42 are used to prevent further runaway by contacting the three bins of the carriage 37.

Next, a data recording area 34a is formed on the magnetic disk 34 in which data is recorded by a magnetic helad 35. Inside this data recording area 34a, there is a C3S area 34b where the magnetic head 35 waits until the magnetic disk 34 reaches a predetermined rotational speed from a stopped state and conversely from a predetermined rotational speed to a stopped state. It is formed. Further, this CSS area 34b is also a place where the magnetic head 35 waits when the magnetic disk device is transported or stored. Furthermore, an inner stopper region 34C is formed inside this CSS region 34b, which is formed as a contraction margin of the damper 40 when the carriage 37 runs out of control and the three bottles abut the carriage lock mechanism 41. Similarly, outside the data recording area 34a, there is an outer stopper area 3 formed as a shrinkage margin for the damper 42 when the carriage 37 runs out of control and the bottle 39 comes into contact with the outer stopper 43.
4d is formed. These stopper areas 34c, 3
The dampers 40 and 42 are formed with a width of about 3 to 5 openings in order to absorb the collision energy when the carriage 37 runs out of control.

Next, the carriage lock mechanism 41 will be explained using FIG. In the figure, the magnetic head 35 is the CS of the magnetic disk 34.
It is located in the S region 34b, and shows a state in which the bin 39 of the carriage 37 is in contact with the damper 40. In the figure, 51 is a hollow cylindrical cylinder with a flange 51a formed at the base end. Furthermore, a window 51b is provided in the cylindrical surface of the cylinder 51. This cylinder 51 is installed on the base 31 using a screw 52 that is screwed into the base 31. A rod-shaped slider 53 is slidably fitted into the cylinder 51 . This slider 5
3 is provided with a damper 40 so as to protrude from the window 51b.

The damper 40 has a bottle abutting part 40a against which the three bottles of the carriage 37 come into contact when the carriage 37 runs out of control. It consists of an engageable groove portion 40b.

The cylinder 51 of the base 31 is attached to a large-diameter hole 31a bored from the outer surface (the surface facing the outside of the magnetic disk drive), and a large diameter hole 31a that is connected to the large diameter hole 31a bored from the outer surface (the surface facing the outside of the magnetic disk drive), A small diameter hole 31b is provided to be inserted into the hole 31b. The large diameter hole 31g is closed by a lid 54 having a projection 54a that fits into the large diameter hole 31a. 55 is a screw for attaching the lid 54 to the base 31. A bellows 56 is provided to close the small diameter hole 31b and prevents dust from entering from outside the magnetic disk device.

A spring 55 is disposed inside and above the cylinder 51, the upper end of which abuts against the top surface of the cylinder 51, and the lower end of which abuts against the slider 53. The slider 53 is urged toward the base 31 by the spring 55 and is pressed against the protrusion 54a of the lid 54 via the bellows 56.

Further, 51c is an air hole provided on the top surface of the cylinder 51.

Next, the operation of the above configuration will be explained. A control circuit (not shown) moves the carriage 37 in the direction of arrow 1 in FIG. 2 so that the magnetic head 35 is positioned at a desired track on the magnetic disk.

When transporting or storing a magnetic disk device, a fourth
As shown in the figure, the lid 54 is turned over so that the protrusion 54a protrudes to the outside of the magnetic disk device. At this time, the magnetic head 35 moves to the CSS area 34b of the magnetic disk 34.
It is located in Then, the slider 53 moves downward due to the biasing force of the spring 55, the groove 40b of the damper 40 engages with the pin 39, and the movement of the carriage 37 is prohibited. During this engagement, the three pins (carriage 37) are guided by the groove 40b and move from the position indicated by the two-dot chain line to the position indicated by the solid line in the figure, and the magnetic head 35 moves to the CS position.
It moves from the S area 34b to the inner stopper area 34c.

According to the above configuration, the magnetic head 35 is on standby in the inner stopper area 34c when the magnetic disk device is transported or stored. Therefore, the magnetic head 35 will not damage the CSS area 34b due to vibrations or mechanical shocks generated during transportation of the magnetic disk device, and head crashes can be prevented. Furthermore, the structure is mechanically simple and the cost is low.

Next, a second embodiment of the present invention will be described using FIG. The only difference between this embodiment and the first embodiment is the mechanism for moving the slider 53 up and down, so the explanation of the other parts will be omitted.

In the figure, 61 is a plate rotatably provided on the base 31 using a pin 62. This plate 62
is provided with an arcuate protrusion 61a having an inclined surface and with which the lower end surface of the slider 53 comes into contact. When the magnetic disk device is transported or stored, the plate 61 is rotated in the direction of the arrow (■). Then, the slider 53 moves downward, and the groove 4 of the damper 40 is moved in the same manner as in the first embodiment.
0b engages with the pin 39, and movement of the carriage 37 is prohibited. During this engagement, the three pins (carriage 37) move while being guided by the groove 40b, and the magnetic head 35
moves from the CSS area 34b to the inner stopper area 34c.

Even in such a configuration, the same effects as in the first embodiment can be obtained.

Note that the present invention is not limited to the above two embodiments. For example, a self-holding solenoid may be used as the mechanism for moving the slider up and down.

[Effects of the Invention] As described above, according to the present invention, when the head is in the CSS area, the carriage lock engages with the carriage, moves the head to the inner stopper area, and prohibits movement of the carriage. A mechanism was established. Therefore, it is possible to realize a magnetic disk device with a simple configuration that can prevent the occurrence of scratches on the CSS area caused by the magnetic head during transportation or storage of the magnetic disk device, and further prevent the occurrence of head crashes. I can do it.

[Brief explanation of drawings]

Fig. 1 is a diagram of the principle of the present invention, Fig. 2 is a cross-sectional view of the configuration showing a first embodiment of the invention, Fig. 3 is an explanatory diagram of the carriage lock mechanism in Fig. 2, and Fig. 4 is a diagram of the third embodiment. 5 is an explanatory diagram showing the locked state in FIG. 5, a main part configuration diagram explaining the second embodiment, FIG. 6 is a configuration diagram of a conventional magnetic disk device, and FIG. 7 is an explanation of the disk surface in FIG. 6. This is a diagram. 1 to 5, 21.34 is a (magnetic) disk, 21a and 34a are data areas, 21b and 34b are CSS areas, 21c and 34c are inner stopper areas, 21d and 34d are outer stopper areas, 22. 35 is a (magnetic) head, 23.37 is a carriage, 24.25 is a stopper, and 26.41 is a carriage lock mechanism 43 which is an outer stopper.

Claims (1)

[Claims] Data recording area (21a), this data recording area (21
CSS region (21b) formed inside a), this CSS region (21b)
A disk (21) provided with an inner stopper area (21c) formed inside the SS area (21b) and an outer stopper area (21d) formed outside the data recording area (21a), and the disk a head (22) that reads/writes data to/from the disk (21); a carriage (23) that moves the head (22) to a target track on the disk (21);
), the stopper (24, 25) for regulating the movement range of the head (22), when the head (22) is in the CSS area (21b), engages with the carriage (23) and moves the head. (22) to the inner stopper area (21c) and a carriage lock mechanism (26) that prohibits movement of the carriage (23).