JP2007133976A - Servo writer, method, and flexible magnetic disk - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent sticking of dusts to a flexible magnetic disk. <P>SOLUTION: The servo writer 2 includes a spindle motor 4, a suspension arm 6 whose tip a magnetic head 5 is attached to, a control unit 7, a disk holding case 8, and a disk cover 9. Four suspension arms 6 and four disk holding cases 8 are provided. The disk holding case 8 is moved between a holding position for holding the flexible magnetic disk 3 and a retreating position. A notch 8b is formed in the disk holding case 8. When moving to a cover position, the disk cover 9 covers the notch 8b, and the four suspension arms 6 and a load motor 19. The control unit 7 moves the disk holding case 8 from the retreating position to the holding position, and then moves the disk cover 9 from an opening position to the cover position. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a servo writer and method for simultaneously recording servo signals on a plurality of flexible magnetic disks, and a flexible magnetic disk.

  A servo signal for controlling the position of the recording / reproducing head of the disk drive device is recorded on the flexible magnetic disk loaded in the disk drive device (see, for example, Patent Document 1). This servo signal is recorded by a servo writer. The servo writer includes a spindle motor and a write head (the magnetic head of the present case), rotates the flexible magnetic disk with the spindle motor, and records a servo signal with the write head on the rotated flexible magnetic disk.

  In recent years, the spread of flexible magnetic disks has increased, and the demand has increased. In order to improve production efficiency and reduce prices, it is required to record servo signals on more flexible magnetic disks in a short time. It has been. When a large number of servo writers are installed, servo signals can be recorded on many flexible magnetic disks in a short time. However, the cost of the flexible magnetic disk itself has been increased due to the purchase cost of the servo writers. Therefore, it is considered that a plurality of flexible magnetic disks to which the center core is fixed are stacked and servo signals are simultaneously recorded on the plurality of flexible magnetic disks with one servo writer. In such a servo writer, a plurality of holding cases (for the number of flexible magnetic disks) for holding the flexible magnetic disk are provided.

The holding case is movably provided between a holding position for holding the upper and lower surfaces of the flexible magnetic disk and a retracted position retracted from the holding position, and does not contact the center core when moving from the retracted position to the holding position. The core cutout and the head cutout in a range slightly larger than the range of the movement trajectory of the magnetic head are formed. As a result, the holding case and the magnetic head can be moved.
Japanese Patent Laid-Open No. 11-66777

  However, in the servo writer as described above, during operation, dust enters the holding case from the core cutout and the head cutout formed in the holding case, and dust adheres to the flexible magnetic disk. There was a problem. When dust adheres to the flexible magnetic disk, servo writing cannot be performed on the dust-attached portion, and further, the magnetic head comes into contact with the dust and is damaged.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a servo writer and method capable of preventing dust from adhering to a flexible magnetic disk, and a flexible magnetic disk. .

  In order to achieve the above object, a servo writer according to the present invention includes a spindle motor on which a plurality of flexible magnetic disks to which a center core is fixed are stacked, and rotates the plurality of flexible magnetic disks; A plurality of movable magnetic heads for simultaneously recording servo signals on the plurality of rotated flexible magnetic disks; and holding the upper and lower surfaces of the flexible magnetic disk to enable rotation of the center core and movement of the magnetic heads And a plurality of disk holding cases each having a notch for forming a notch, and a cover for covering the notch.

  Moreover, it is preferable to provide the moving means which moves the said cover between the cover position which covers the said notch, and the open position retracted | saved from this cover position. Further, it is preferable that the cover covers the flexible magnetic disk exposed from the disk holding case and the magnetic head when moved to the cover position.

  In the servo write method of the present invention, a plurality of flexible magnetic disks to which a center core is fixed are overlapped and rotated, and servo signals are simultaneously transmitted to the rotated flexible magnetic disks by a plurality of movable magnetic heads. A servo writing method for recording, wherein the upper and lower surfaces of the plurality of flexible magnetic disks are held by a plurality of disk holding cases formed with notches for enabling rotation of the center core and movement of the magnetic head. The servo signals are simultaneously recorded on the plurality of flexible magnetic disks in a state where the notches are covered.

  Furthermore, the flexible magnetic disk of the present invention is characterized in that a servo signal is recorded by the servo writer described above.

  According to the servo writer of the present invention, a plurality of flexible magnetic disks to which a center core is fixed are stacked and loaded, and a spindle motor that rotates the plurality of flexible magnetic disks; a plurality of flexible magnetic disks that are rotated by the spindle motor; A plurality of movable magnetic heads for simultaneously recording servo signals; and a plurality of disks having notches for holding the upper and lower surfaces of a flexible magnetic disk and enabling rotation of the center core and movement of the magnetic head Since the holding case and the cover that covers the notch are provided, dust does not enter the disk holding case from the outside, and the dust does not adhere to the flexible magnetic disk. As a result, it is possible to reliably prevent servo write failure and damage to the magnetic head due to dust adhering to the flexible magnetic disk.

  In addition, since the moving means for moving the cover between the cover position covering the notch and the open position retracted from the cover position is provided, the cover is positioned at the open position when the flexible magnetic disk is placed on or removed from the spindle motor. The servo light can be positioned at the cover position.

  Furthermore, according to the servo write method of the present invention, a plurality of flexible magnetic disks to which the center core is fixed are overlapped and rotated, and servo signals are transferred to the rotated plurality of flexible magnetic disks by a plurality of movable magnetic heads. Servo write method for recording simultaneously, holding the upper and lower surfaces of a plurality of flexible magnetic disks by a plurality of disk holding cases formed with notches for enabling rotation of the center core and movement of the magnetic head, Servo signals are simultaneously recorded on a plurality of flexible magnetic disks with the notches covered, so that dust does not enter the disk holding case from the outside, and dust does not adhere to the flexible magnetic disk. As a result, it is possible to reliably prevent servo write failure and damage to the magnetic head due to dust adhering to the flexible magnetic disk.

  Further, according to the flexible magnetic disk of the present invention, since the servo signal is recorded by the servo writer described above, it is possible to reliably prevent the servo write failure and the magnetic head from being damaged due to dust adhering to the flexible magnetic disk. Thus, the cost per sheet can be reduced.

  As shown in FIGS. 1, 2 and 3, the servo writer 2 embodying the present invention simultaneously records servo signals on four flexible magnetic disks 3, and the spindle motor 4 and magnetic head 5 are at the tip. A suspension arm 6, a control unit 7, a disc holding case 8, and a disc cover (cover) 9 attached to the unit. Four disk holding cases 8 are provided. These four disk holding cases 8 are unitized, and the case moving mechanism 10 holds the flexible magnetic disk 3 (see FIG. 4) and the holding position. It is provided so as to be movable between a retracted position (see FIGS. 1 and 3) retracted from the position. The case moving mechanism 10 is connected to the control unit 7, and the drive is controlled by the control unit 7. In the present embodiment, the first disk holding case 8, the second disk holding case 8, the third disk holding case 8, and the fourth disk holding case 8 are referred to in order from the bottom.

  The servo writer 2 includes three spacers 11. A spacer 11 is placed on the flexible magnetic disk 3 engaged with the spindle head 32 of the spindle motor 4. The flexible magnetic disk 3, the spacer 11, the flexible magnetic disk 3, the spacer 11, and the flexible magnetic disk 3 are placed on the spacer 11 in this order. In the present embodiment, the first spacer 11, the second spacer 11, and the third spacer 11 are referred to in order from the bottom, and the first flexible magnetic disk 3, the second flexible magnetic disk 3, They are called the third flexible magnetic disk 3 and the fourth flexible magnetic disk 3. In FIG. 1, only the first flexible magnetic disk 3 and the first spacer 11 are illustrated in a simplified manner.

  The flexible magnetic disk 3 is coated with a magnetic layer on both sides, and a disk hole 3a is formed at the center. A metal center core 15 is attached to the center of the lower surface of the flexible magnetic disk 3 with a double-sided tape or the like. The center core 15 is formed in a disc shape, an insertion hole 15a is formed in the center portion, and a ring-shaped engagement convex portion for engaging with the spindle head 32 or the spacer 11 is formed on the lower surface. Yes.

  The magnetic head 5 is for recording servo signals on the flexible magnetic disk 3 and is attached to the tip of the suspension arm 6. The magnetic head 5 includes a head body, and the head body is composed of a recording element that converts an electrical signal corresponding to data to be recorded on the flexible magnetic disk 3 into a magnetic field. The magnetic head 5 is connected to the control unit 7 by a connection wire (not shown), and the drive is controlled by the control unit 7 to record a servo signal on the flexible magnetic disk 3.

  The suspension arm 6 includes an upper load beam 17 and a lower load beam 18 made of a thin metal that can be elastically deformed. The upper load beam 17 and the lower load beam 18 are rotatably attached to a motor shaft 19a of a load motor 19 composed of a VCM (voice coil motor). As the load motor 19 is driven, the upper load beam 17 and the lower load beam 18 rotate. The magnetic head 5 is attached to the lower end portion of the upper load beam 17 and the upper end portion of the lower load beam 18. When the suspension arm 6 is rotated, it is arranged so that the flexible magnetic disk 3 is sandwiched by a mechanism in which the flexible magnetic disk 3 enters between the upper load beam 17 and the lower load beam 18. As a result, servo signals can be recorded on the upper and lower surfaces of the flexible magnetic disk 3. The load motor 19 is connected to the control unit 7, and the drive is controlled by the control unit 7. The load motor 19 is fixed to a base plate (not shown) to which the spindle motor 4 is fixed.

  Four suspension arms 6 are provided, so that servo signals can be simultaneously recorded on both the upper and lower surfaces of the four flexible magnetic disks 3. The magnetic head 5 is always biased in a direction to be pressed against the flexible magnetic disk 3 by a constant force by the upper load beam 17 and the lower load beam 18 that are elastically deformed.

  The disk holding case 8 is for holding the upper and lower surfaces of the flexible magnetic disk 3 and has a concave disk insertion portion 8a into which the flexible magnetic disk 3 is inserted. In this disk insertion portion 8 a, the entrance when the flexible magnetic disk 3 is inserted is formed in a tapered shape as a guide for the flexible magnetic disk 3.

  Liners (not shown) for removing dust on the surface of the flexible magnetic disk 3 and preventing it from being damaged are attached to the upper and lower surfaces of the disk insertion portion 8a. The disc holding case 8 is formed with a notch 8b for allowing the suspension arm 6 to move and for allowing the center core 15 and the spindle head 32 to rotate.

  The disk holding case 8 is formed so that the vertical thickness is larger than the vertical thickness of the suspension arm 6, and the upper surface of the suspension arm 6 does not protrude from the upper surface of the disk holding case 8. The lower surface of 6 is disposed at a position so as not to protrude from the lower surface of the disk holding case 8.

  When the disk holding case 8 is moved from the retracted position to the holding position, the disk is damaged even when the flexible magnetic disk 3 is stopped or the flexible magnetic disk 3 and the disk holding case 8 come into contact with each other. It is set to move in a state of being rotated at a difficult low speed (for example, 300 rpm or less). In the present embodiment, the disk holding case 8 is moved from the retracted position to the holding position while the flexible magnetic disk 3 is rotated at 200 rpm.

  The disk cover 9 is for preventing dust from adhering to the flexible magnetic disk 3 when the disk holding case 8 is located at the holding position, and is cut by the cover moving mechanism (moving means) 25. It is provided so as to be movable between a cover position (see FIGS. 2 and 5) covering the notch 8b and an open position (see FIGS. 1, 3 and 4) retracted from the cover position. The cover moving mechanism 25 is connected to the control unit 7, and the drive is controlled by the control unit 7. In response to the movement of the disk holding case 8 to the holding position, the control unit 7 controls the drive of the cover moving mechanism 25 and moves the disk cover 9 from the open position to the covering position.

  The disc cover 9 is formed in a box shape so as to cover the notches 8b of the four disc holding cases 8 and the four suspension arms 6 and the load motor 19 when moved to the cover position. . On the upper surface of the disc cover 9, there is formed an insertion portion 9a that is inserted into the notch 8b when the disc cover 9 is moved to the cover position. The insertion portion 9a is formed in a shape that substantially matches the notch 8b. When the disc cover 9 is moved to the cover position, the upper surface of the insertion portion 9a is made to substantially coincide with the upper surface of the fourth disc holding case 8. Thereby, when the disc cover 9 moves to the cover position, the notch 8 b of the fourth disc holding case 8 is covered with the disc cover 9. The insertion portion 9a is formed with a thickness that does not contact the upper surface of the uppermost suspension arm 6 of the four suspension arms 6 when the disc cover 9 moves to the cover position. Thereby, the notch 8b of the fourth disk holding case 8 can be covered without hindering the drive (rotation) of the suspension arm 6.

  The disc cover 9 is formed to have substantially the same width as the disc holding case 8 in the direction A in FIGS. 1 and 2, and the first cover surface 9b and the second cover surface 9c are four discs in the height direction. The holding case 8 is formed at substantially the same height. The first cover surface 9b and the second cover surface 9c are formed so as to come into contact with the rear surfaces of the disk holding cases 8 in FIGS. 1 and 2 when the disk cover 9 moves to the cover position. As a result, when the disk cover 9 moves to the cover position, the entrance when the flexible magnetic disk 3 of each disk holding case 8 is inserted is covered with the disk cover 9.

  As shown in FIGS. 1 and 2, the disk cover 9 is formed with a cover rib 9 d for covering the notch 8 b of the first disk holding case 8. The cover rib 9d is formed so that the upper surface of the cover rib 9d contacts the lower surface of the first disk holding case 8 when the disk cover 9 moves to the cover position. Thus, when the disc cover 9 moves to the cover position, the notch 8b of the first disc holding case 8 is covered with the disc cover 9 (see FIGS. 2 and 5), and the first to fourth Each notch 8b of the disk holding case 8 is covered with the disk cover.

  The cover rib 9d is formed with a motor cutout 9e for preventing the disk cover 9 from coming into contact with the load motor 19 when the disk cover 9 moves from the open position to the cover position. The disk cover 9 only needs to cover the notch 8b, and the shape thereof can be changed as appropriate.

  As shown in FIGS. 1 and 3, the spindle motor 4 is for rotating the flexible magnetic disk 3 and includes a motor body 31, a spindle head 32, and a motor shaft 33. The motor body 31 is connected to the control unit 7, and the drive is controlled by the control unit 7. When the motor body 31 is driven, the spindle head 32 and the motor shaft 33 rotate. The spindle motor 4 is fixed to a base plate (not shown).

  The spindle head 32 is formed in a cylindrical shape, and a motor shaft 33 is attached to the center of the upper surface. On the upper surface of the spindle head 32, an engagement recess 32a into which the engagement protrusion of the center core 15 of the first flexible magnetic disk 3 is inserted is formed. Three magnets are embedded in the spindle head 32 at a pitch of 120 °, and the engaging convex portion of the center core 15 is inserted into the engaging concave portion 32a so that the center core 15 and the spindle head 32 are engaged. When positioned, the metal center core 15 is held by the magnetism of the magnet. Note that the number of magnets embedded in the spindle head 32 can be changed as appropriate, and magnets configured in a ring shape may be used.

  A first spacer 11 is placed on the first flexible magnetic disk 3 engaged with the spindle head 32. On the first spacer 11, the second flexible magnetic disk 3, the second spacer 11, the third flexible magnetic disk 3, the third spacer 11, and the fourth flexible magnetic disk 3 are arranged in this order. Can be placed. The motor shaft 33 protrudes from the upper surface of the fourth flexible magnetic disk 3 and has a length that does not contact the disk cover 9.

  The spacer 11 is formed in a substantially disk shape having a groove formed at the center of the side surface. An insertion hole 11 a that allows the motor shaft 33 to be inserted and engages with the motor shaft 33 is formed at the center of the spacer 11.

  On the upper surface of the spacer 11, an engagement recess 11 b into which the engagement protrusion of the center core 15 of the flexible magnetic disk 3 is inserted is formed.

  In the spacer 11, three magnets are embedded at an upper surface and a lower surface at a pitch of 120 °. The center core 15 of the first flexible magnetic disk 3 and the first spacer 11 are locked by the magnetism of the magnet. Further, the engaging convex portion of the center core 15 of the second flexible magnetic disk 3 is inserted into the engaging concave portion 11b of the first spacer 11, and the center core 15 and the first spacer 11 are engaged and positioned. Then, the center core 15 of the second flexible magnetic disk 3 is held by the first spacer 11 by the magnetism of the magnet. In addition, the number of magnets embedded in the spacer 11 can be changed as appropriate, and magnets configured continuously in a ring shape may be used.

  Similarly to the first spacer 11, the center core 15 and the second spacer 11 of the second flexible magnetic disk 3 are locked, and the center core 15 of the third flexible magnetic disk 3 is It is held by the spacer 11. Furthermore, the center core 15 of the third flexible magnetic disk 3 and the third spacer 11 are locked, and the center core 15 of the fourth flexible magnetic disk 3 is held by the third spacer 11. Then, the control unit 7 moves the disk holding case 8 from the retracted position to the holding position, and then moves the disk cover 9 from the open position to the covering position. In this state, the control unit 7 controls the driving of the spindle motor 4, the magnetic head 5, and the load motor 19 to simultaneously record servo signals on the four flexible magnetic disks 3.

  The operation of the servo writer 2 configured as described above will be described. In the servo writer 2 embodying the present invention, servo signals are simultaneously recorded on the four flexible magnetic disks 3. First, as shown in FIG. 3, on the spindle head 32, the first flexible magnetic disk, the first spacer 11, the second flexible magnetic disk 3, the second spacer 11, and the third flexible magnetic disk 3. The third spacer 11 and the fourth flexible magnetic disk 3 are mounted in this order. Next, as shown in FIG. 4, the control unit 7 controls the drive of the case moving mechanism 10 to move the disk holding case 8 from the retracted position to the holding position. 2 and 5, in response to the movement of the disk holding case 8 to the holding position, the control unit 7 controls the drive of the cover moving mechanism 25 to open the disk cover 9. Move from position to cover position. In this state, servo signals are simultaneously recorded on the four flexible magnetic disks 3 by the magnetic head 5.

  When the servo signal recording (servo write) by the magnetic head 5 is completed, the control unit 7 controls the drive of the cover moving mechanism 25 to move the disk cover 9 from the cover position to the open position. Next, in response to the movement of the disc cover 9 to the open position, the control unit 7 controls the drive of the case moving mechanism 10 to move the disc holding case 8 from the holding position to the retracted position. Then, the first to fourth flexible magnetic disks 3 and the first to third spacers 11 are removed from the spindle head 32.

  In this manner, during the servo write, the disk cover 9 covers the notches 8b of the four disk holding cases 8, so that dust enters the disk holding case 8 from the outside, and the flexible magnetic disk 3 is covered with dust. There is no adhesion. As a result, it is possible to reliably prevent the servo write failure and the magnetic head 5 from being damaged due to dust adhering to the flexible magnetic disk 3.

  Also, during the servo write, the disk cover 9 covers the four suspension arms 6 and the load motor 19, so that dust does not adhere to the magnetic head 5 attached to the suspension arm 6. As a result, it is possible to reliably prevent a servo write failure and damage to the magnetic head 5 due to dust adhering to the magnetic head 5.

  In the above embodiment, the servo writer 2 that simultaneously records servo signals on the four flexible magnetic disks 3 has been described. However, the number of flexible magnetic disks 3 that simultaneously record servo signals can be appropriately changed. Accordingly, the number of the magnetic head 5, the suspension arm 6, the disk holding case 8 and the spacer 11, and the shape of the disk cover 9 can be changed as appropriate.

  Moreover, in the said embodiment, although the disk holding case 8 was comprised by one member, it is not limited to this, What is necessary is just to be able to hold | maintain the upper and lower surfaces of the flexible magnetic disc 3, and it consists of a some member You may make it do.

  Furthermore, in the above embodiment, during the servo write, the disk cover 9 covers the notches 8b, the four suspension arms 6 and the load motor 19 of the four disk holding cases 8. The spindle motor 4 may be covered with a disk cover 9 inside.

It is a perspective view which shows the servo writer which implemented this invention. It is a perspective view showing a servo writer when a disk holding case is located at a holding position and a disk cover is located at a cover position. FIG. 5 is a side sectional view showing the servo writer when the disk holding case is located at the retracted position and the disk cover is located at the open position. It is side surface sectional drawing which shows a servo writer when a disk holding case is located in a holding position and a disk cover is located in an open position. It is side surface sectional drawing which shows a servo writer when a disk holding case is located in a holding position and a disk cover is located in a cover position.

Explanation of symbols

2 Servo Writer 3 Flexible Magnetic Disk 4 Spindle Motor 5 Magnetic Head 6 Suspension Arm 8 Disk Holding Case 8b Notch 9 Disk Cover (Cover)
11 Spacer 15 Center core 19 Load motor 25 Cover moving mechanism (moving means)

Claims (5)

A spindle motor on which a plurality of flexible magnetic disks to which a center core is fixed are stacked and mounted, and rotates the plurality of flexible magnetic disks;
A plurality of movable magnetic heads that simultaneously record servo signals on the plurality of flexible magnetic disks rotated by the spindle motor;
A plurality of disk holding cases for holding the upper and lower surfaces of the flexible magnetic disk and forming notches for allowing rotation of the center core and movement of the magnetic head,
A servo writer comprising a cover for covering the notch.   2. The servo writer according to claim 1, further comprising moving means for moving the cover between a cover position covering the notch and an open position retracted from the cover position.   3. The servo writer according to claim 1, wherein the cover covers the flexible magnetic disk exposed from the disk holding case and the magnetic head when moved to the cover position. Rotate a plurality of flexible magnetic disks with a fixed center core
A servo write method for simultaneously recording servo signals on a plurality of rotated flexible magnetic disks with a plurality of movable magnetic heads,
By holding a plurality of disk holding cases formed with notches for enabling rotation of the center core and movement of the magnetic head, the upper and lower surfaces of the plurality of flexible magnetic disks are held,
A servo write method, wherein servo signals are simultaneously recorded on the plurality of flexible magnetic disks in a state of covering the notches.   A flexible magnetic disk, wherein a servo signal is recorded by the servo writer according to any one of claims 1 to 3.

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