JP3178735B2 - Loading method of negative pressure type slider - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a magnetic disk drive.
The present invention relates to a method for loading a negative pressure type slider in an apparatus .

[0002]

2. Description of the Related Art Conventionally, a flying disk slider having a magnetic head for recording and reproducing data is generally used in a magnetic disk drive. In order to position the magnetic head on a desired track on the magnetic disk, a flexure is fixed to the end of an arm movable in a direction transverse to the magnetic disk rotation direction, and a floating slider is attached to the end of the flexure. ing. Generally, a positive pressure type slider is used for a flying type slider. In the positive pressure type slider, when the magnetic disk is stopped, the slider is pressed against the magnetic disk surface with a constant load, and is in contact with the magnetic disk surface for a while even after the magnetic disk starts rotating. When the rotation of the magnetic disk reaches a predetermined number of rotations, the magnetic disk floats on the slider while maintaining the position where the positive pressure generated by the airflow generated on the surface of the magnetic disk and the load acting on the slider are balanced. When the rotational speed of the magnetic disk is reduced, the positive pressure is reduced, and the magnetic disk stops again while the slider contacts the magnetic disk surface again. However, when such an operation is performed, the slider and the magnetic disk surface rub against each other, causing abrasion powder and scratches, and the slider and the magnetic disk being attracted to each other due to moisture agglomerated on the magnetic disk surface. So in recent years,
A method has been proposed in which a negative pressure type slider is used as a floating type slider, and the slider and the magnetic disk are levitated in a non-contact manner. FIG. 4 is a perspective view of a main part of a magnetic disk drive using a conventional negative pressure type slider. In FIG. 4, reference numeral 1 denotes a flexure constituted by a leaf spring,
The flexure 1 is fixed to a carriage arm 4 that is movable in a direction crossing the data tracks recorded on the magnetic disk 5. The flexure 1 is bent near the carriage arm 4 and fixed to the carriage arm 4 so that a restoring force acts in a direction away from the magnetic disk 5.
Reference numeral 2 denotes a gimbal formed by a thin plate provided at the tip of the flexure 1 and is fixed to the flexure 1, and a slider 3 is attached to the gimbal 2. The gimbal 2 twists during the rolling motion and the pitching motion of the slider 3, and flies while following the slider 3 and the magnetic disk 5. A load pin 6 is provided on the opposite side of the flexure 1 from the magnetic disk 5 side so as not to contact the flexure 1 and apart from the flexure 1 and attached to the support arm 7. When loading the slider 3 onto the magnetic disk 5, the support arm 7
The flexure 1 is displaced toward the magnetic disk 5 by the load pin 6 attached to the support arm 7. The driving of the support arm 7 is performed by supplying a constant current to the solenoid 8 and changing the iron core 80 of the solenoid 8 from the protruding state to the retracted state. Hereinafter, the above operation will be described with reference to FIG. In FIG. 5A, when the magnetic disk 5 is not rotating, no current is supplied to the solenoid 8, so the iron core 80 of the solenoid 8 is in a protruding state, and the load pin 6 and the flexure 1 are separated. State. Next, when the magnetic disk 5 rotates and reaches a predetermined number of rotations, a current is supplied to the solenoid 8. Then, the iron core 80 of the solenoid 8 shifts from the protruding state to the retracted state, the support arm 7 moves in the direction of the magnetic disk 5, and the load pin 6 attached to the support arm 7 pushes and flexes the flexure 1 toward the magnetic disk 5. The state is shown in FIG. Further, the flexure 1 is moved to the state shown in FIG.
When the slider 3 is approached to a certain distance, a negative pressure is generated in the slider 3, and the slider 3 floats so as to be attracted to the magnetic disk 5. Then, the slider 3 flies with a fixed gap from the magnetic disk 5 in a state where the positive pressure and the negative pressure generated in the slider 3 and the restoring force of the flexure 1 are balanced. As described above, the loading operation can be performed using the negative pressure type slider.

[0003]

However, in the above-described conventional configuration, the flexure 1 may not be present at the loading position due to vibration at the time of conveyance or a momentary interruption of the power supply at the time of operation. At this time, when the loading operation is performed, the load pins 6 attached to the support arm 7 come into contact with the magnetic disk 5 and damage the magnetic disk 5 to generate dust, destroy data or crash, thereby ensuring high reliability. Can not. Also, even when the flexure 1 is present at the loading position, the loading state is not confirmed, and the user attempts to move to a predetermined position even when the loading is not performed. Deformation, crash of the slider 3 and the magnetic disk 5 occur, and there is a problem that high reliability cannot be ensured. SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and a negative pressure type slider in a magnetic disk drive device which does not cause deformation of a flexure or a gimbal and crash of a slider or a magnetic disk.
The purpose of the present invention is to provide a loading method .

[0004]

SUMMARY OF THE INVENTION A negative pressure slider according to the present invention.
The loading method in order to achieve the above object, b over <br/> loading starts at Oite the magnetic disk is released prior Kia Murokku after reaching a predetermined rotational speed, the Kyari'
Jiamu is moved to the loading position to lock said arm lock, the first step that reading the Servo information,
It determines from or loaded state the servo information
A second step, releasing the arm locking if loaded state, the negative pressure type slider on the magnetic disk
Move to a predetermined position to end the loading operation.
3 steps or Rodin not grayed state in if the load unit performs loading of the negative pressure type slider,
The Servo information to determine whether the loading state than reading said servo information, said releasing the earth <br/> Murokku if loaded state the negative pressure type slider magnetic disk
Move to a predetermined position on the
That a fourth step, be equipped with, also, your in the fourth step
In the loading state
If it is determined that the vehicle is not in the running state, the fourth step is performed.
This is to repeat a certain number of times .

[0005]

According to the present invention, with the above-described structure, vibrations during transport during loading, instantaneous interruption of power during operation, etc.
Even if the flexure does not exist at the loading position, release the arm lock of the carriage arm, move the carriage arm to the arm lock position to lock the arm lock, fix the flexure at the load position and perform loading, The servo information recorded in advance is read to judge whether it is in the loading state, and if it is in the loading state, the arm lock is released and moved to a predetermined position, so that the load pin attached to the support arm does not contact the magnetic disk Loading can be performed, and dust is not generated due to scratching the magnetic disk, data is not destroyed or crashed, and high reliability can be secured. Even if a flexure exists at the loading position,
Going to read the recorded servo information and confirming the loading state, it does not move to the specified position without loading, and moves to the specified position only in the loading state, so the servo information can not be read and runaway As a result, deformation of the flexure and gimbal and crash of the slider and the magnetic disk are eliminated, and high reliability can be secured.

FIGS. 1 and 2 show a negative pressure type slider according to the present invention.
1 shows the configuration and operation of a magnetic disk drive in one embodiment of the loading method of the present invention. FIG. 3 is a flowchart of a loading operation in one embodiment of the present invention. 1 and 2, the same components as those of the conventional example are denoted by the same reference numerals. In FIG. 1, reference numeral 1 denotes a flexure constituted by a leaf spring. The flexure 1 is fixed to a carriage arm 4 which is movable in a direction crossing a data track recorded on a magnetic disk 5. Flexure 1 is magnetic disk 5
It is bent near the carriage arm 4 and fixed to the carriage arm 4 so that a restoring force acts in a direction away from the carriage arm 4. Reference numeral 2 denotes a gimbal formed by a thin plate provided at the tip of the flexure 1 and is fixed to the flexure 1, and a slider 3 is attached to the gimbal 2. The gimbal 2 twists during the rolling motion and the pitching motion of the slider 3, and the slider 3 flies while following the magnetic disk 5. Reference numeral 6 denotes a load pin provided on the opposite side of the flexure 1 from the magnetic disk 5 side so as not to contact the flexure 1 and apart from the flexure 1 and attached to the support arm 7. When the slider 3 is loaded onto the magnetic disk 5, the support arm 7 displaces the flexure 1 toward the magnetic disk 5 by the load pin 6 attached to the support arm 7. The driving of the support arm 7 is performed by supplying a constant current to the solenoid 8 and moving the iron core 80 of the solenoid of the solenoid 8 from the projected state to the retracted state.
In FIG. 2, reference numeral 4 denotes a carriage arm to which the flexure 1 is fixed;
It is movable along. Reference numeral 40 denotes a concave portion of the carriage arm for fixing the carriage arm 4, and 9 denotes an external actuator dedicated for fixing. When the carriage arm 4 is fixed, the carriage arm 4 is moved to a fixed position and the external actuator 9 is moved from the external actuator 9 to the external actuator. Convex part
Pull out 90 and insert it into the recess 40 of the carriage arm 4 to fix the carriage arm 4.

The loading operation of the magnetic disk drive of the embodiment constructed as described above will be described with reference to the flowchart of FIG. First,
When the magnetic disk 5 is not rotating, the solenoid 8
As shown in FIG. 5 (A), the current is not supplied to the load pin 6 and the load pin 6 attached to the support arm 7 is separated from the flexure 1 as shown in FIG. Further, as shown in FIG. 2A, the projection 90 of the external actuator is in a protruding state and the carriage arm 4 is not fixed. Next, a magnetic disk 5 reaches a rotational speed of a predetermined start to rotate (S _1-Yes) pulling the convex portion 90 of the external actuator as shown in FIG. 2 (B), releases the arm lock (S ₂₎ Then, the carriage arm 4 is moved to the fixed position, that is, the loading position (S ₃ ). After the carriage arm 4 moves to the loading position, the protrusion 90 of the external actuator is extended as shown in FIG. 2C, and the carriage arm 4 is fixed (S ₄ ). After the carriage arm 4 is fixed, the servo information is read (S ₅ ). When the servo information is correctly read, the loading state is determined (S ₆ ), and the protrusion 90 of the external actuator is pulled to release the arm lock. (S ₁₀ ) to move the carriage arm 4
Move the slider 3 to a predetermined position is terminated (S ₁₁₎ loading operation. In contrast, when the servo information is not read correctly makes decisions load starts operating and loading non-state (S _7). When the load start operation starts,
The current is supplied to the solenoid 8. When the current is started to be supplied to the solenoid 8, the iron core 80 of the solenoid shifts from the protruding state to the retreating state as shown in FIG. 5B of the conventional example, and the supporting arm 7 moves in the direction of the magnetic disk 5 accordingly. Begin to. Therefore, the load pin 6 attached to the support arm 7 contacts the flexure 1 and pushes and flexes the flexure 1 toward the magnetic disk 5. Further, when a current is supplied to the solenoid 8, the load pin 6 pushes the flexure 1 down to a predetermined position. As a result, a dynamic pressure is generated on the slider 3, and the slider 3 flies above the magnetic disk 5.
At this time, when a negative pressure type slider is used as the slider 3, the combined force of the positive pressure generated on the slider 3 to push up the magnetic disk 5 and the force of the flexure 1 to separate the slider 3 from the magnetic disk 5 is obtained. 5
The slider 3 keeps a stable floating state with a constant distance from the magnetic disk 5 at a position where the slider 3 is balanced with a force acting to be attracted toward the magnetic disk 5 by the negative pressure from the magnetic disk 5. Then, the supply of the current to the solenoid 8 is stopped. When the supply of the current to the solenoid 8 is stopped, the iron core 80 of the solenoid shifts from the retracted state to the projected state as shown in FIG. 5 (C), and accordingly the support arm moves in a direction away from the magnetic disk 5 to perform the loading operation. finish. When the load operation is completed and then went servo information read (S _8), after determining that the loading Not state when the servo information is not read correctly (S _9), it is determined whether or not reload operation already
(S _12), if re-load operation already, the process proceeds to the error processing
(S _13), performs a reload operation otherwise, determines that the loading state when the servo information is read correctly, pull the convex portion 90 of the external actuator, to release the arm lock (S ₁₀₎ moving the carriage arm 4 to move the slider 3 to a predetermined position (S _11), and ends the loading operation. As described above, according to the loading method of the magnetic disk drive device according to the embodiment of the present invention, the flexure 1 does not exist at the loading position or the flexure 1 does not Even when the flexure 1 is present and the loading operation is not performed after the loading operation, the load pin 6 attached to the support arm 7 contacts the magnetic disk 5 and damages the magnetic disk 5 to generate dust.
Even if the data is not destroyed, crashed, or loaded, it tries to move to a predetermined position. Since the servo information cannot be read, runaway occurs, and the deformation of the flexure 1 and the gimbal 2 and the crash of the slider 3 and the magnetic disk 5 do not occur. A loading operation can be performed, and high reliability can be ensured.

[0008]

As is apparent from the above embodiment, the negative pressure type slider in the magnetic disk drive of the present invention is used.
In the loading method , after the magnetic disk reaches a certain number of rotations during loading, the arm lock of the carriage arm is released, the carriage arm is moved to the arm lock position to lock the arm lock, and the servo information recorded in advance is read To determine whether the loading state, if the loading state, release the arm lock and move to a predetermined position, and if not in the loading state, perform the loading, read the pre-recorded servo information again and read the loading state. Is determined, and if it is in the loading state, the arm lock is released and moved to a predetermined position. If it is not in the loading state, it is loaded again. As a result, the load pin attached to the loading support arm can be loaded without contacting the disk. If the vehicle is not in the loading state, there is no movement to a predetermined position, so that servo information cannot be read and no runaway occurs. Therefore, there is no generation of dust, damage to data, deformation of flexures and gimbals, crashes of sliders and magnetic disks due to damage to the magnetic disk, and the effect of securing high reliability of the magnetic disk device can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a magnetic disk drive in an embodiment of a loading method of a negative pressure type slider according to the present invention.

FIG. 2 is a view for explaining the operation of the main part of the magnetic disk drive in an embodiment of the loading method of the negative pressure type slider according to the present invention.

FIG. 3 is a flowchart of a loading operation of the magnetic disk drive in one embodiment of the present invention.

FIG. 4 is a perspective view showing a configuration of a conventional magnetic disk drive.

FIG. 5 is a diagram illustrating an operation of a main part of a conventional magnetic disk drive.

[Explanation of symbols]

1 ... flexure, 2 ... gimbal, 3 ... slider,
4 carriage arm, 5 magnetic disk, 6 load pin, 7 support arm, 8 solenoid, 9 external actuator, 10 roller, 11 rail, 40
Recessed part of carriage arm, 80 ... iron core of solenoid,
90: Projection of external actuator.

Claims (2)

(57) [Claims] A magnetic disk according to claim 1 was previously recorded servo information, a carriage arm that moves substantially parallel to the magnetic disc, an arm <br/> locks for fixing the carriage arm, attached to the carriage arm A negative pressure slider having a magnetic head mounted on the flexure via a gimbal, and a load means for displacing the flexure toward the magnetic disk .
A rider of the loading process, to release the pre-Kia Murokku loading starts at Oite the magnetic disk after reaching a predetermined <br/> rpm, the arm moves the previous SL carriage arm to the loading position to lock the lock, the first step that reading the Servo information
If, it is determined whether more or loading state wherein servo information
A second step, releasing the arm locking if loading state, before
A third step of moving the negative pressure type slider to a predetermined position on the magnetic disk and ending the loading operation;
It said in the load means if not the Rodin grayed state is
Performs loading of the negative pressure type slider, the Servo information to determine whether the loading state than reading the servo information, to release the arm lock if loaded state for a predetermined position on the negative pressure type slider the magnetic disc And the fourth step of terminating the loading operation
Rodin negative pressure type slider comprising the, the
Method . 2. A whether loading state in the fourth step determines, Rodin grayed state not equal determine
The load of the negative pressure type slider according to claim 1 , wherein the fourth step is repeated a predetermined number of times when the disconnection is made.
Method .