JP3566402B2 - Disk unit - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a disk driven to rotate, a slider on which a head for reading / writing data from / to the disk is mounted, a suspension having the slider attached to a distal end thereof, and a base end of the suspension having a head mounted thereon. An actuator for moving the suspension so that the head crosses tracks of the disk.aboutYou.
[0002]
In recent years, disk drives have been required to have large capacities and miniaturization, and internal mechanisms such as load / unload mechanisms in the disk drives have been required to have a simplified configuration so as to respond to miniaturization. ing. Further, from the viewpoint of durability, there is a demand for a head that can prevent the occurrence of head crash and head suction for a long period.
[0003]
[Prior art]
There is a CSS (Constant Start Stop) method for driving the head of a magnetic disk device which is a typical disk device. In this method, the head is kept in contact with the disk surface when the disk is stopped. In the CSS method, the head is attracted to the disk surface when the disk stops, and the disk may not rotate when the disk is restarted. Therefore, a texture that intentionally roughens the disk surface is applied.
[0004]
On the other hand, there is also a head driving method using a load / unload mechanism that moves the head to a load state when the disk is rotating and forcibly lifts the head from the disk surface when the disk is stopped.
[0005]
FIG. 23 is a basic configuration diagram of a load / unload mechanism in a conventional magnetic disk drive using the latter drive method. In this configuration, a moving coil type rotary actuator 2 is arranged near the disk 1 to be driven to rotate, and the base ends of a pair of suspensions 3 are fixed to one end of the actuator 2 so as to sandwich the disk 1. .
[0006]
A slider 4 on which a head for reading / writing data is mounted is attached to the tip of each suspension 3 and faces the upper and lower surfaces of the disk 1, respectively (only the upper slider is shown). The actuator 2 drives the suspension 3 so that the head crosses the track of the disk 1.
[0007]
A bifurcated unloading member 5 straddling the outer peripheral portion of the disk 1 is fixed near the outer peripheral portion of the disk 1. When each of the suspensions 3 is driven and the head moves to the shunting area, the unloading member 5 moves up and down. The heads are lifted off the disk surface by sliding on the inclined surface 5a. The inclined surface 5a of the unload member 5 is obtained by forming a bifurcated protruding portion 5b such that the thickness gradually decreases toward the inner peripheral side of the disk 1.
[0008]
The operation of the above conventional example is as follows. When the disk 1 is rotating at a high speed, the slider 4 receives an airflow accompanying the rotation, so that the head floats by a minute amount from the disk surface. Therefore, by rotating the actuator 2, the head can be moved onto a target track of the disk 1 and data can be read / written from / to the disk 1.
[0009]
When stopping the magnetic disk drive, the actuator 2 rotates toward the unloading member 5. Thereby, the side portion of the suspension 3 rides on the inclined surface 5a formed on the protruding portion 5b of the unloading member 5, and the head floats from the disk surface. Thereafter, the actuator 2 stops (unloaded state), and the rotation of the disk 1 also stops.
[0010]
When the magnetic disk device is restarted, the disk 1 is again driven to rotate at a high speed, and then the actuator 2 rotates toward the center of the disk 1. Thus, the engagement between the suspension 3 and the inclined surface 5a of the unload member 5 is released, and the head can read / write data from / to the disk 1 (load state).
[0011]
In a magnetic disk drive using a plurality of disks, the unload members 5 are arranged by the number of disks.
[0012]
[Problems to be solved by the invention]
In the CSS method, the disk surface is textured as described above. However, if the disk surface is rough, the flying height of the slider cannot be reduced, and high-density recording and, consequently, large capacity cannot be achieved. Further, in this CSS method, the contact time from the start of rotation of the disk to the start of floating of the head during the start-up operation and the contact time from the end of floating of the head to the stop of rotation of the disk during the stop operation are determined by the disk and the head. Are in a sliding contact state, the sliding surfaces of the two are worn by repeating the CSS operation a number of times, causing troubles such as head crash due to advancing wear and head suction due to smoothing of the sliding surface. Therefore, in the CSS method, improvement in durability is demanded.
[0013]
On the other hand, in the configuration of FIG. 23, when the size is reduced and the distance between the disk and the inner surface of the housing or the distance between the disks is reduced, the plate thickness of the slider 4 and the unloading member 5 must be reduced. However, if the thickness of the unloading member 5 is reduced, its rigidity is reduced, and the suspension 3 is deformed due to repeated riding, and as a result, the unloading member 5 comes into contact with the disk 1 and damages the disk 1. Will be. Therefore, when the thickness of the unload member 5 is reduced, the durability cannot be improved.
[0014]
The present invention has been made in view of the above problems, and an object of the present invention is to realize a disk device having a structure capable of improving durability with a simple configuration.
[0015]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a disk driven to rotate, a slider on which a head for reading / writing data from / to the disk is mounted, a suspension having the slider attached to a tip end thereof, An actuator for moving the suspension so that the head crosses the track of the disk, the base end of the suspension being fixed, the head moving with the suspension in a direction crossing the track of the disk, A beam having a curved portion curved in the thickness direction of the disk is provided in a part thereof, and a force in a direction substantially perpendicular to the thickness direction is applied to the curved portion to bend the curved portion in the thickness direction. The change in the thickness of the curved portion in the thickness direction of the curved portion is transmitted to the slider, and the slider is moved to the Is moved in a direction, it is characterized in performing at least one of the operation of the loading / unloading operation.
[0016]
According to a second aspect of the present invention, there is provided a disk driven to rotate, a slider on which a head for reading / writing data from / to the disk is mounted, a suspension having the slider attached to a tip end, An actuator having a base end portion of the suspension fixed thereto and an actuator for moving the suspension so that the head traverses a track of the disk, wherein an inner stopper or an inner stopper of the disk located on the inner peripheral side of the disk is provided. An outer stopper located on the outer peripheral side, the stopper having at least a part thereof supported by a beam having a curved portion curved in the thickness direction of the disk, and the actuator configured to bend the beam. Applying a force in a direction substantially perpendicular to the plate thickness direction to the portion, A change in the thickness of the bending portion in the thickness direction of the bending portion due to the bending is transmitted to the slider, and the slider is moved in the thickness direction of the disk, and at least one of a load / unload operation is performed. One of the operations is performed.
[0017]
FIG. 1 is a principle diagram relating to displacement at a curved portion of a beam used in the first and second inventions. In FIG. 1, when a force f (force equal to or more than a buckling load) in a direction substantially perpendicular to the thickness direction is applied to the bending portion 10 of the beam, the bending portion 10 is moved in the thickness direction (the same direction as the thickness direction of the disk). The curved portion 10 bends in the y direction, and the thickness w of the curved portion 10 in the thickness direction changes. In the first and second inventions, the change in the thickness w is transmitted to the slider, and the slider is moved in the thickness direction of the disk, that is, in the load / unload direction.
[0018]
Here, in the first invention, at least one of an inner stopper located on the inner peripheral side of the disk and an outer stopper located on the outer peripheral side of the disk is provided, and the side surface of the curved portion of the beam is provided on the stopper. It is preferable to bend the bending portion by abutting and move the slider in the disk direction in order to simplify the configuration.
[0019]
According to the second aspect of the present invention, the head arm portion of the actuator is provided with a hook that abuts against the side surface of the curved portion of the beam and applies a force in a direction substantially perpendicular to the plate thickness direction. Is preferred.
[0020]
Furthermore, it is preferable to use beams having curved portions that are already curved in a natural state as the beams of the first and second inventions in order to ensure the displacement direction of the curved portions..
[0021]
[Action]
In the disk device of the first invention, the beam moves together with the suspension in a direction crossing the track of the disk. Here, when a force in a direction substantially perpendicular to the plate thickness direction is applied to the curved portion of the beam, the curved portion bends in the thickness direction of the disk, and the thickness of the curved portion in the thickness direction changes. The change in the thickness of the curved portion in the thickness direction is transmitted to the slider, and moves the slider in the thickness direction of the disk. As a result, at least one of the load / unload operations can be performed.
[0022]
In this configuration, there is no sliding contact between the disk and the head, no contact between the beam and the disk, and the durability can be improved. Further, the beam may be thin, and its curved portion also receives a force in a direction substantially perpendicular to the plate thickness direction. Therefore, the load / unload mechanism can be made thinner, and it is possible to cope with downsizing.
[0023]
In the above device, at least one of an inner stopper located on the inner peripheral side of the disk and an outer stopper located on the outer peripheral side of the disk is provided, and the side of the curved portion of the beam comes into contact with the stopper. Is curved, and the slider is moved in the disk direction, at least one of the load / unload operation can be performed with a simple configuration.
[0024]
In the disk device of the second invention, the beam is supported by the stopper. Here, when the actuator applies a force in a direction substantially perpendicular to the plate thickness direction to the bending portion of the beam, the bending portion bends in the plate thickness direction of the disk, and the thickness of the bending portion in the plate thickness direction changes. The change in the thickness of the curved portion in the thickness direction is transmitted to the slider, and moves the slider in the thickness direction of the disk. As a result, at least one of the load / unload operations can be performed.
[0025]
In the above device, a hook is provided on the head arm portion of the actuator, the bending portion is bent by abutting the hook on the side surface of the bending portion of the beam, and the slider is moved in the disk direction. At least one of the load / unload operations can be performed.
[0026]
If the beam used in the disk device of the first and second inventions has a curved portion which is already curved in a natural state, the displacement direction of the curved portion can be assured.
[0029]
【Example】
Hereinafter, an embodiment of the first invention will be described by taking a magnetic disk device as an example. FIG. 2 is a perspective view (partially cut away) of a main part of an embodiment of the first invention (using a plurality of disks), and FIGS. 3 and 4 show a head assembly and an embodiment of FIG. FIGS. 5 and 6 show the positional relationship with the disk, and FIGS. 5 and 6 are diagrams for explaining the movement of the slider due to the bending of the beam in the embodiment of FIG.
[0030]
In these figures, disks 11 (three in this embodiment; 11a, 11b, 11c) stacked at regular intervals are rotationally driven by a spindle motor (not shown) provided on a base plate 12. Things. An actuator 13 is rotatably provided on the base plate 12, and a plurality of head arms 14 (14a, 14b, 14c, 14d) extending in the disk surface direction are formed at one rotation end. I have.
[0031]
A suspension 15 is attached to the rotating end of each head arm 14, and a slider 16 is attached to the tip of the suspension 15. The suspension 15 and the slider 16 face the upper and lower surfaces of the disks 11a, 11b, 11c, respectively.
[0032]
That is, a suspension 15a is attached to the head arm 14a, and a slider 16a is attached to the tip of the suspension 15a.
Suspensions 15b and 15c are attached to the head arm 14b, and a slider 16b is attached to a tip of the suspension 15b, and a slider 16c is attached to a tip of the suspension 15c. The head arms 14c and 14d have the same structure as the head arms 14b and 14a, respectively.
[0033]
The slider includes a positive pressure slider and a negative pressure slider, and a negative pressure slider is used as the slider 16 in this embodiment. In a positive pressure slider, the slider is levitated by a positive pressure generated between the slider and the disk, and a spring force in a direction opposite to the positive pressure is applied to the slider to maintain a floating balance of the slider. However, since the positive pressure slider uses a positive pressure that depends on the peripheral speed and a spring force that does not depend on the peripheral speed, the flying height changes between the inner circumference and the outer circumference of the disk. There is.
[0034]
On the other hand, in the negative pressure slider, the floating balance of the slider is maintained by the positive pressure and the negative pressure generated between the slider and the disk. The positive pressure and the negative pressure depend on the peripheral speed, and the flying height hardly changes between the inner circumference and the outer circumference of the disk, which is advantageous for lowering the flying height.
[0035]
The slider 16 in the present embodiment may be any type of negative pressure slider, one example of which is shown in FIG. First and second convex side rails 161 and 162 are formed on both sides of the slider facing surface of the slider 16 along the flow direction (arrow wd) of the air flow generated by the rotation of the disk. ing. The first and second side rails 161 and 162 have tapered portions 161a and 162a on the air inflow end side in the direction away from the disk.
[0036]
A groove 163 for guiding the air flow from the air inflow end to the air outflow end is formed between the convex first side rail 161 and the second side rail 162. Further, a cross rail 164 as a throttle is formed near the air inflow end of the groove 163.
[0037]
In the slider 16, a part of the airflow generated by the rotation of the disk flows between the slider 16 and the disk. As a result, a positive pressure (force for floating the slider) is generated in the first and second side rails 161 and 162. On the other hand, the air flow also enters the groove 163, and after passing through the cross rail 164, the volume rapidly expands, and a negative pressure is generated in the groove 163 after the cross rail 164.
[0038]
By the balance between the positive pressure and the negative pressure, the slider 16 stably floats at a certain position. A head 20 for reading / writing data is formed on the rear end surface of the second side rail 162 of each slider 16.
[0039]
A base 23a of a beam 23 (see FIG. 8) having a substantially T shape in a plan view is fixed to an upper surface of the head arm 14a. Thus, the beam 23 moves in a direction crossing the track of the disk 11a together with the suspension 15a. At the other end of the beam 23, a curved portion 23b that is curved in the thickness direction of the disk 11a is formed. The bending portion 23b bends in the thickness direction when it receives a force in a direction substantially perpendicular to the thickness direction (lateral direction in FIG. 8A). The central portion of the curved portion 23b can contact the upper surface of the suspension 15a so that a change in the thickness of the curved portion 23b in the thickness direction is transmitted to the slider 16a.
[0040]
In the present embodiment, a beam 23 having a curved portion 23b which is already curved in its natural state is used, and the displacement direction of the curved portion 23b is surely directed to the disk 11a.
[0041]
A stopper 25 is provided at a position on the outer peripheral side of the disk 11 on the base plate 12, and the curved portion 23 b of the beam 23 is curved when its side surface comes into contact with the stopper 25. Note that a beam similar to that in the case of the above-described head arm 14a is also provided on the lower surface of the head arm 14d.
[0042]
Between the suspension 15b and the suspension 15c, a cylindrical beam 24 (see FIG. 9) having a substantially elliptical cross section is disposed so as to be able to abut the suspensions 15b and 15c (for example, the suspension 15b is connected to the suspension 15b). Has been stopped). The beam 24 includes two opposing curved portions 24a and 24b. The curved portions 24a and 24b of the beam 24 have their side surfaces abutting against the stopper 25, so that the curved portions 24a and 24b bend in opposite directions. A beam similar to that of the head arm 14b is provided between the suspension 15d facing the lower surface of the disk 11b and the suspension 15e facing the upper surface of the disk 11c.
[0043]
A coil 21 is provided at a rotating end of the actuator 13 opposite to the slider 16 side. A magnetic circuit 22 composed of a magnet and a yoke is provided on the base plate 12, and the coil 21 is arranged in a magnetic gap of the magnetic circuit 22. The magnetic circuit 22 and the coil 21 form a moving coil type linear motor (VCM: voice coil motor). The upper portion of the base plate 12 is covered with a cover (not shown).
[0044]
Next, the operation of the above embodiment will be described by taking the sliders 16a, 16b and 16c as an example. First, in a stopped state of the magnetic disk device, the actuator 13 is stopped at the retracted position. In this state, as shown in FIG. 5, the sliders 16a, 16b and 16c are in a state of being lifted from the disk surface (unloaded state).
[0045]
When the magnetic disk drive is started and the disk 11 starts rotating at high speed, the actuator 13 presses the side surfaces of the curved portions 23b, 24a, 24b of the beams 23, 24 against the stopper 25 as shown in FIG. Thereby, the central portions of the curved portions 23b and 24b are curved downward in FIG. 6, and the curved portion 24a is curved upward in FIG. For this reason, the suspensions 15a and 15c are pushed downward, the suspension 15b is pushed upward, and the sliders 16a, 16b and 16c approach the disk surface and are in a state of floating a minute amount from the disk surface (load state).
[0046]
In this state, since the sliders 16a, 16b, and 16c, which are the negative pressure sliders, receive the suction force of the airflow, the head 20 (the sliders 16a, 16b, 16c) and the disk surface are maintained.
[0047]
Therefore, the head 20 can be moved to the data area on the disk surface while the load state is maintained, and the head is moved onto the target track of the disks 11a and 11b by the rotation of the actuator 13, and the disks 11a and 11b are moved. Can read / write data.
[0048]
To stop the magnetic disk drive, the actuator 13 is first rotated to the retreat position, and then the rotation of the disks 11a and 11b is also stopped. As a result, the head 20 is released from the restraint by the airflow, and returns to the unload state in which the beams 23 and 24 float from the disk surface by the force of returning to the natural state.
[0049]
According to the above configuration, there is no sliding contact between the disk 11 and the head 20 and no contact between the beams 23 and 24 and the disk 11, and the durability can be improved. Further, the beams 23 and 24 may be thin, and the curved portions 23b, 24a and 24b also receive a force in a direction substantially orthogonal to the plate thickness direction. Therefore, the load / unload mechanism can be made thinner and downsized. Can also respond.
[0050]
Although the above embodiment is a disk device using a plurality of disks, the present invention is not limited to this, and can be applied to a disk device using a single disk. Further, a beam as shown in FIG. 8 may be provided for all suspensions.
[0051]
Further, the shape of the beam is not limited to those shown in FIGS. In other words, it moves in the direction traversing the track of the disk together with the suspension, and at least partially has a curved portion that bends in the direction of the thickness of the disk. Any structure may be used as long as the portion is curved in the thickness direction. For example, even if the curved portion is a flat plate in a natural state, if a reverse warp regulating member for regulating the curvature is arranged on one side, the curved portion receives a force in a direction substantially perpendicular to the plate thickness direction. The bending always curves to the opposite side of the regulating member, and the object can be achieved.
[0052]
In the above embodiment, the mechanism for bending the bending portion by contacting the stopper is used. However, the present invention is not limited to this. (1) A coil spring made of a shape memory alloy is hooked on both sides of the beam to bend. A part which is bent and the degree of bending is changed by applying heat. (2) The side part of the bent part is configured to be bent by pulling with magnetic attraction, and this magnetic attraction is changed. A device that changes the degree of curvature depending on the situation may be used.
[0053]
Further, the present invention can be applied to a slider using a positive pressure slider. FIG. 10 is a diagram showing another embodiment of the first invention. The difference between this embodiment and the above-described embodiment is that the present embodiment is a magnetic disk drive employing the CSS system and the head shopping position. It is a point which has. FIG. 10 shows only the mechanism related to the movement of the head to the head shopping position and the return from the head shopping position.
[0054]
In FIG. 10, a plate 32 for providing a head shopping position 32A is provided outside the disk 31 driven to rotate. The suspension 33 to which the slider 34 is attached is provided with, for example, a beam 35 having a structure similar to the beam shown in FIG.
[0055]
Further, a stopper 36 is provided so as to be movable in the lateral direction in FIG. 10, and the curved portion 35a of the beam 35 can be brought into contact with the stopper 36. The stopper 36 is not only movably arranged, but also elastically supports the curved portion 35a of the beam 35 by a pressure applying means 37 such as a spring pressure.
[0056]
In this embodiment, when the side surface of the curved portion 35a of the beam 35 is pressed against the stopper 36 by an actuator (not shown), the curved portion 35a bends upward in FIG. As a result, the suspension 33 is pushed upward, and the slider 34 flies above the disk surface and enters an unloaded state (the state shown in FIG. 10).
[0057]
In this state, the bending portion 35a of the beam 35 is elastically supported by the action of the pressure applying means 37. Therefore, even if the actuator and the stopper 36 are further rotated outward, the head is kept at the same height. It remains. Therefore, the head can be moved to the head shopping position 32A while maintaining the unloaded state.
[0058]
After the movement to the head shopping position 32A, if the restraint of the curved portion 35a of the beam 35 is released, the beam 35 returns to the natural state, so that the slider 34 comes into contact with the head shopping position 32A as shown in FIG. Return. Returning the slider 34 to the disk surface can likewise be achieved by the reverse operation.
[0059]
FIG. 13 is a view showing an embodiment of the second invention, and FIGS. 14 and 15 are views for explaining movement of a slider due to bending of a beam in the embodiment of FIG. In these drawings, parts corresponding to those in FIGS. 2 to 9 are denoted by the same reference numerals. The difference between this embodiment and the embodiment of the first invention shown in FIGS. 2 to 9 described above is a portion related to the mounting position of the beams 23 and 24.
[0060]
That is, in the present embodiment, one side surface of the curved portions 23b, 24a, 24b of the beams 23, 24 is fixed to the stopper 25 via the support members 26, 28, respectively, and the beams 23 are attached to the head arm portions 14a, 14b. , 24 are provided with hooks 28, 29 which can abut on the other side surfaces of the curved portions 23b, 24a, 24b. The beam 23 in this embodiment is not a T-shaped beam with a base 23a as shown in FIG. 8, but a rectangular beam having only a curved portion 23b.
[0061]
Next, the operation of the present embodiment will be described. First, in a stopped state of the magnetic disk device, the actuator 13 is stopped at the retracted position. In this state, as shown in FIG. 13, the sliders 16a, 16b, 16c are in a state of being lifted from the disk surface (unloaded state).
[0062]
When the magnetic disk drive is started and the disk 11 starts rotating at a high speed, the actuator 13 is started, and the side surfaces of the curved portions 23b, 24a, 24b of the beams 23, 24 are hooked 28, 29 as shown in FIG. Presses. Accordingly, the central portions of the curved portions 23b and 24b are curved downward in FIG. 14, and the curved portion 24a is curved upward in FIG. For this reason, the suspensions 15a and 15c are pushed downward, the suspension 15b is pushed upward, and the sliders 16a, 16b and 16c approach the disk surface and are in a state of floating a minute amount from the disk surface (load state).
[0063]
In this state, since the sliders 16a, 16b, and 16c, which are the negative pressure sliders, receive the suction force of the airflow, the head 20 (the sliders 16a, 16b, 16c) and the disk surface are maintained. Therefore, the head 20 can be moved to the data area on the disk surface while the load state is maintained, and the head is moved onto the target track of the disks 11a and 11b by the rotation of the actuator 13, and the disks 11a and 11b are moved. Can read / write data.
[0064]
To stop the magnetic disk drive, the actuator 13 is first rotated to the retreat position, and then the rotation of the disks 11a and 11b is also stopped. As a result, the head 20 is released from the restraint by the airflow, and returns to the unload state in which the beams 23 and 24 float from the disk surface by the force of returning to the natural state.
[0065]
According to the above configuration, there is no sliding contact between the disk 11 and the head 20 and no contact between the beams 23 and 24 and the disk 11, and the durability can be improved. Further, the beams 23 and 24 may be thin, and the curved portions 23b, 24a and 24b also receive a force in a direction substantially orthogonal to the plate thickness direction. Therefore, the load / unload mechanism can be made thinner and downsized. Can also respond.
[0066]
In the above embodiment, one side surface of the curved portions 23b, 24a, 24b is fixed in order to restrict the movement of the beams 23, 24. However, if the movement of the beams 23, 24 can be prohibited, it is not fixed. You may. It goes without saying that various modifications can be made to the second invention as in the case of the first invention.
[0067]
FIG. 15 shows the third invention.(Invention from a viewpoint different from the first and second inventions)It is a top view which shows one Example. In the third invention, it is assumed that the disk device adopts the CSS method. Except for adopting the CSS method and having no beams, the configuration of the embodiment of FIG. 15 is almost the same as the configuration of the embodiments already shown in FIGS.
[0068]
In FIG. 15, disks 41 (three in this embodiment) stacked at regular intervals are driven to rotate by a spindle motor (not shown) provided on a base plate 42. An actuator 43 is rotatably provided on the base plate 42, and a plurality of head arms 44 extending in the disk surface direction are formed at one rotation end.
[0069]
A suspension 45 is attached to the rotating end of each head arm 44, and a slider 46 is attached to the tip of the suspension 45. The suspension 45 and the slider 46 are provided so as to face the upper surface or the lower surface of the disk 41, respectively.
[0070]
Although there are a positive pressure slider and a negative pressure slider as the slider, a positive pressure slider is used as the slider 46 in this embodiment.
A coil 47 is provided at a rotating end of the actuator 43 opposite to the slider 46. A magnetic circuit 48 composed of a magnet and a yoke is provided on the base plate 42, and the coil 47 is arranged in a magnetic gap of the magnetic circuit 48. The magnetic circuit 48 and the coil 47 constitute a moving coil type linear motor.
[0071]
Further, on the base plate 42, a spoiler 49 as shown in FIG. The tip of the spoiler 49 can be moved to the vicinity of the CSS zone of the disk 41. The tip of the spoiler 49 is moved to the vicinity of the CSS zone of the disk 41 when the apparatus is started by driving means (not shown). Enhance. The slits 49a, 49b, 49c of the spoiler 49 are for avoiding interference with the disk 41.
[0072]
Next, the operation of the above embodiment will be described. First, in a stopped state of the magnetic disk device, the actuator 43 is stopped in a state where the head is in the CSS zone, and the slider 46 is in contact with the disk surface. The tip of the spoiler 49 has moved to the vicinity of the CSS zone of the disk 41.
[0073]
When the magnetic disk drive is started and the disk 41 starts rotating, a positive pressure is generated between the slider 46 and the disk 41 due to the airflow generated by the rotation of the disk 41, and the slider 46 floats, and the minute It is in a state of floating (load state).
[0074]
At the time of flying, the tip of the spoiler 49 has moved to the vicinity of the CSS zone of the disk 41, and the air flow generated by the rotation of the disk 41 is collected near the slider 46 by the spoiler 49. Speed will be increased. As a result, the force for flying the slider 46 also increases, and the slider 46 flies quickly.
[0075]
In this state, the head can be moved onto a target track of the disk 41 by the actuator 43 to read / write data from / to the disk 41. Note that the spoiler 49 is retracted to a position on the outer peripheral side of the disk 41 as shown in FIG. 17 during the time when data is read / written after the slider 46 flies. This is to ensure a state (load state) in which the slider 46 flies a small amount from the disk surface.
[0076]
To stop the magnetic disk drive, the actuator 43 is first swung to the retreat position, and then the rotation of the disk 41 is also stopped. As a result, the slider 46 is released from the restriction due to the airflow, and returns to the state in which it comes into contact with the disk surface.
[0077]
According to the above configuration, the contact time from the start of rotation of the disk 41 to the start of floating of the head at the time of the start-up operation can be reduced, and the progress of wear of the sliding contact surfaces of the disk 41 and the head due to the sliding contact of the head is delayed. become. Therefore, troubles such as head crash and head suction due to smoothing of the sliding contact surface do not occur for a long period of time, and the durability can be improved.
[0078]
FIG. 18 is a plan view showing another embodiment of the third invention, and FIG. 19 is a perspective view of a main part of the embodiment of FIG. In these figures, parts corresponding to those of the embodiment shown in FIG. 15 and the like are denoted by the same reference numerals, and description thereof will be omitted.
[0079]
In this embodiment, a spoiler 51 having a shape along the outer periphery of the disk 41, that is, a curved arc is used. The tip of the spoiler 51 is moved to the vicinity of the CSS zone of the disk 41 by a tension coil spring 52 hooked between the pivot and the base plate 42. Has been biased.
[0080]
In this embodiment, when the magnetic disk drive is stopped, the tip of the spoiler 51 is moved to the vicinity of the CSS zone of the disk 41 by the action of the coil spring 52. Then, when the magnetic disk drive is started and the disk 41 starts rotating, the speed of the air flow generated by the rotation of the disk 41 increases according to the rotation speed of the disk 41, so that the spoiler 51 pushes against the gradually increasing air flow. As a result, the disk 41 is automatically pushed back to the outer periphery of the disk 41 as shown in FIG.
[0081]
On the other hand, the air flow generated by the rotation of the disk 41 generates a positive pressure between the slider 46 and the disk 41, and the slider 46 flies. Here, when the disk 1 rotates at a low speed, the air flow generated by the rotation of the disk 41 is collected near the slider 46 by the spoiler 51. Therefore, when the slider 46 starts flying, the speed of the air flow near the slider 46 is increased. become. As a result, the force for flying the slider 46 also increases, and the slider 46 flies quickly.
[0082]
At the time of reading / writing data after the slider 46 flies, the spoiler 51 is retracted to a position on the outer peripheral side of the disk 41 as shown in FIG. The lock 53 is used to fix the spoiler 51 to the position shown in FIG. 18 when the apparatus is not operated by using the moving projection, but it can also be used to determine the start timing of the movement of the spoiler 51.
[0083]
FIG. 21 is a plan view showing still another embodiment of the third invention. In this figure, portions corresponding to those of the embodiment shown in FIG. 15 and the like are denoted by the same reference numerals, and description thereof will be omitted. In the present embodiment, a linear spoiler 54 is disposed downstream of the head arm 44 so as to be horizontally rotatable about a shaft 55.
[0084]
The spoiler 54 changes the air flow direction in the same manner as the spoiler in the embodiment shown in FIG. 15 and the like, but locks the head arm (actuator) by abutting against the protrusion 44a on the side of the head arm portion 44. Lock). At the time of reading / writing data after the slider 46 flies, the spoiler 54 is retracted to a position on the outer peripheral side of the disk 41 as shown in FIG.
[0085]
Also in this embodiment, the contact time from the start of rotation of the disk 41 to the start of floating of the head during the start-up operation can be reduced, and the progress of wear of the sliding contact surfaces of the disk 41 and the head due to the sliding contact of the head is delayed. become.
[0086]
【The invention's effect】
As described above, according to the first and second aspects, when a force in a direction substantially perpendicular to the thickness direction is applied to the curved portion of the beam, the curved portion bends in the thickness direction of the disk, and the curved portion is bent. Changes in the thickness direction. The change in the thickness of the curved portion in the thickness direction is transmitted to the slider, and moves the slider in the thickness direction of the disk. As a result, at least one of the load / unload operations can be performed.
[0087]
In this configuration, there is no sliding contact between the disk and the head, no contact between the beam and the disk, and the durability can be improved. Further, the beam may be thin, and its curved portion also receives a force in a direction substantially perpendicular to the plate thickness direction. Therefore, the load / unload mechanism can be made thinner, and it is possible to cope with downsizing.
[0088]
In the disk device of the first invention, at least one of an inner stopper located on the inner peripheral side of the disk and an outer stopper located on the outer peripheral side of the disk is provided, and the side surface of the curved portion of the beam contacts the stopper. If the bending portion is bent by contact and the slider is moved in the disk direction, at least one of the load / unload operation can be performed with a simple configuration.
[0089]
In the disk device according to the second aspect of the present invention, if a hook is provided on the head arm portion of the actuator, the hook is brought into contact with the side surface of the curved portion of the beam to bend the curved portion, and the slider is moved in the disk direction. With such a configuration, at least one of the load / unload operations can be performed.
[0090]
If the beam used in the disk device according to the first and second aspects of the present invention has a curved portion that is already curved in a natural state, the displacement direction of the curved portion can be reliably achieved with a simple configuration. .
[Brief description of the drawings]
FIG. 1 is a principle diagram regarding displacement at a curved portion of a beam used in the first and second inventions.
FIG. 2 is a perspective view (partially cut away) showing a configuration of a main part in one embodiment (using a plurality of disks) of the first invention.
FIG. 3 is a diagram showing a positional relationship between a head assembly and a disk in the embodiment of FIG. 2;
4 is a diagram showing a positional relationship between a head assembly and a disk in the embodiment of FIG.
FIG. 5 is a diagram for explaining movement of a slider due to bending of a beam in the embodiment of FIG. 2;
FIG. 6 is a view for explaining movement of a slider due to bending of a beam in the embodiment of FIG. 2;
FIG. 7 is a perspective view showing an example of a negative pressure slider.
8A and 8B are explanatory views of a beam, in which FIG. 8A is a front view and FIG. 8B is a plan view.
9A and 9B are explanatory views of a beam, in which FIG. 9A is a front view and FIG. 9B is a plan view.
FIG. 10 is a diagram showing another embodiment of the first invention.
FIG. 11 is a view showing another operation state of the embodiment of FIG. 10;
FIG. 12 is a diagram showing one embodiment of the second invention.
FIG. 13 is a view for explaining movement of a slider due to bending of a beam in the embodiment of FIG. 12;
FIG. 14 is a view for explaining movement of a slider due to bending of a beam in the embodiment of FIG. 12;
FIG. 15 is a plan view showing one embodiment of the third invention.
FIG. 16 is a perspective view of the spoiler in FIG.
FIG. 17 is a plan view showing another operation state of the embodiment in FIG. 15;
FIG. 18 is a plan view showing another embodiment of the third invention.
19 is a perspective view of a main part of the embodiment of FIG.
FIG. 20 is a plan view showing another operation state of the embodiment in FIG. 18;
FIG. 21 is a plan view showing still another embodiment of the third invention.
FIG. 22 is a plan view showing another operation state of the embodiment in FIG. 21;
FIG. 23 is a basic configuration diagram of a load / unload mechanism in a conventional magnetic disk drive.
[Explanation of symbols]
10: Curved part of beam
11, 11a, 11b, 11c, 31, 41: Disk
12, 42: Base plate
13, 43: Actuator
14, 14a, 14b, 14c, 14d, 44: head arm
15, 15a, 15b, 15c, 15d, 15e, 33, 45: suspension
16, 16a, 16b, 16c, 34, 46: slider
20: Head
21, 47: coil
22, 48: Magnetic circuit
23, 24, 35: beams
23a: Base
23b, 24a, 24b, 35a: curved portion
25, 36: Stopper
28, 29: hook
32: Plate
32A: Head shopping position
37: Pressure applying means
44a: protrusion
49: Spoiler
49a, 49b, 49c: slit
50, 55: axis
51, 54: Spoiler
53: Lock

Claims (5)

A rotating disk, a slider on which a head for reading / writing data to / from the disk is mounted, a suspension having the slider attached to a distal end thereof, and a base end of the suspension fixed to the suspension; An actuator for moving the suspension so that a head crosses tracks of the disk,
A beam having a curved portion that moves in a direction traversing the track of the disk together with the suspension and at least partially curves in a thickness direction of the disk is provided.
Applying a force in a direction substantially perpendicular to the thickness direction to the bending portion to bend the bending portion in the thickness direction, and transmitting a change in the thickness of the bending portion in the thickness direction due to the bending to the slider, A disk device, wherein a slider is moved in a thickness direction of the disk to perform at least one of a load / unload operation. The disk has at least one of an inner stopper located on the inner peripheral side of the disk and an outer stopper located on the outer peripheral side of the disk, and the side surface of the curved portion of the beam abuts on the stopper. 2. The disk drive according to claim 1, wherein the slider is curved to move the slider in the disk direction. A rotating disk, a slider on which a head for reading / writing data to / from the disk is mounted, a suspension having the slider attached to a distal end thereof, and a base end of the suspension fixed to the suspension; An actuator for moving the suspension so that a head crosses tracks of the disk,
The disk has at least one of an inner stopper located on the inner peripheral side of the disk and an outer stopper located on the outer peripheral side of the disk, and the stopper is at least partially curved in the thickness direction of the disk. A beam having a curved portion is supported, and the actuator applies a force to the curved portion in a direction substantially perpendicular to the thickness direction to bend the curved portion in the thickness direction. A disk device that transmits a change in thickness in the thickness direction to the slider, moves the slider in the thickness direction of the disk, and performs at least one of a load / unload operation. 4. The disk device according to claim 3, wherein a hook is provided on a head arm of the actuator to abut against a side surface of the curved portion of the beam and applies a force in a direction substantially orthogonal to a plate thickness direction. 5. The disk device according to claim 1, wherein the beam has a curved portion which is already curved in a natural state .

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