JP2004071068A - Disk unit and head supporting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk unit and a head supporting device in which a slider is surely fixed when disk rotation stops and the slider and the disk do not collide with each other even by an external shock and which have high shock resistance. <P>SOLUTION: The disk unit is composed of a disk 112 holding a recording medium, a head for performing either recording or reproduction to the disk 112, a slider mounting the head, a supporting arm with the slider attached to one of edges, a base arm provided with a rotation supporting part for rotatably supporting the supporting arm in the vertical direction to the surface of the disk 112, an elastic member for giving energizing force to energize the supporting arm provided between the supporting arm and the base arm in the direction of the disk 112, and stationary part 128 for pressing a pressure part 129 at the other edge where the head of the supporting arm is not installed. Thus, the supporting arm can be formed of a rigid member and, when the pressure part 129 is pressed, the slider leaves the disk 112 and is fixed. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a head support device for performing recording and reproduction on a disk using a floating head, and a disk device using the same.
[0002]
[Prior art]
A conventional head support device using a floating type head and a magnetic recording / reproducing device such as a hard disk device as an example of a disk device using the same will be described with reference to the drawings.
[0003]
FIG. 6 is a schematic perspective view of a conventional magnetic recording / reproducing apparatus. The head supporting device 108 includes a relatively low-rigidity suspension 102, a leaf spring 103, a relatively high-rigidity arm 104, and a slider 101 provided on one end of the suspension 102 facing the disk 112. The slider 101 includes a head (not shown) mounted on the slider 101. Further, a tab 113 having relatively low rigidity is attached to an end of the head support device 108 on the slider 101 side. The suspension 102 is designed to have relatively low rigidity, and the other end is bent to form a leaf spring 103, which is connected to the arm 104. Further, the arm 104 is rotatably supported by a bearing 105, and the head support device 108 is rotated in a predetermined angle range in a direction parallel to the surface of the disk 112 by a driving unit 106 attached to the arm 104. be able to. Further, an arm fixing portion 110 having a tapered portion 110a is provided outside the disk 112.
[0004]
The disk 112 is rotated at a predetermined rotation speed by the rotation driving means 109. At the time of recording / reproducing by the magnetic recording / reproducing apparatus, the slider 101 has a constant flying height due to the balance between the levitation force generated by the air flow generated by the rotation of the disk 112 and the urging force for urging the slider 101 toward the disk 112 surface. And the head performs recording and reproduction in this constant flying state. The force for urging the slider 101 toward the surface of the disk 112 is mainly applied by the leaf spring 103 of the head support device 108.
[0005]
The magnetic recording / reproducing apparatus shown in FIG. 6 is a magnetic recording / reproducing apparatus generally called a load / unload method (hereinafter, referred to as an L / UL method). This is to retract the slider 101 from the surface of the disk 112 as a countermeasure against an external impact when the rotation of the disk 112 is stopped. That is, when the slider 101 is on the surface of the disk 112, the slider 101 collides with the disk 112 due to an impact, and both the slider 101 and the disk 112 are damaged. Therefore, when the rotation of the disk 112 is stopped, the head support device 108 rotates about the bearing portion 105, and the tab 113 rides on the tapered portion 110a of the arm fixing portion 110 provided outside the disk 112. The slider 101 is retracted from the surface of the disk 112.
[0006]
[Problems to be solved by the invention]
As described above, in the L / UL system, when unloading, the tab rides on the arm fixing portion, but the relatively rigid portion of the head support device is only the portion where the slider is disposed, and the other portions have rigidity. Low. For this reason, the head support device is likely to vibrate even when moved to the arm fixing portion, and the tab at the tip of the head supporting device may not reliably climb on the arm fixing portion. In such a case, if an impact is applied from the outside, the slider comes off the arm fixing portion, and the head support device collides with the disk, and both the head support device and the disk are damaged. Such a phenomenon occurs not only in the magnetic recording / reproducing apparatus described above but also in a disk device having a floating head, for example, an optical disk device or a magneto-optical disk device.
[0007]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a high impact resistance disk device in which a slider is securely fixed when the rotation of a disk is stopped, and the slider and the disk do not collide against an external impact. And a head support device.
[0008]
[Means for Solving the Problems]
A disk device of the present invention includes a disk holding a recording medium, a head that performs at least one of recording and reproduction on the disk, a support arm having the head attached to one end, and a support arm. A base arm provided with a rotation support portion for supporting the disk in a direction perpendicular to the disk main surface, and an urging force provided between the support arm and the base arm to urge the support arm in the disk direction. It is provided with an elastic member to be provided and a pressing means for pressing a pressing portion at the other end to which the head of the support arm is not attached.
[0009]
With this configuration, since the support arm can be provided directly on the base arm, it is possible to independently provide a member having a rigid body and a member having elasticity. Therefore, the support arm portion can be formed of a highly rigid member, and the support arm is supported by the rotation support portion so as to be highly rigid and rotatable, so that the support arm is less likely to vibrate. Further, by pressing the pressing portion by the pressing means, the slider can be fixed in a state separated from the disk, so that the slider can be prevented from colliding with the disk even when an external impact is applied.
[0010]
Further, in the disk device of the present invention, the fixing portion disposed near the outer peripheral portion of the disk and the support arm move parallel to the main surface of the disk in the direction of the fixing portion, come into contact with the fixing portion, and the pressing means presses the pressing portion. The section is pressed. With this configuration, the pressing portion is reliably pressed, and the slider is fixed while the slider is separated from the disk.
[0011]
Further, the disk device of the present invention has a tapered shape in which the fixing portion is parallel to the main surface of the disk, the thickness is thin in the inner circumferential direction of the disk, and thick in the outer circumferential direction of the disk. With this configuration, the pressing portion can smoothly contact the fixing portion, and the pressing portion is more reliably pressed.
[0012]
Further, in the disk device of the present invention, when the rotation of the disk is stopped, the rotation of the disk is stopped after the pressing means presses the pressing portion. With this configuration, when the disk is rotating, the slider is separated from the disk by the levitation force, but the slider is further separated from the disk by pressing the pressing portion. If the rotation of the disk is stopped in this state, the slider will not come into contact with the disk even if the levitation force is lost, and neither the slider nor the disk will be damaged.
[0013]
Further, in the disk device of the present invention, when the rotation of the disk is started, after the rotation of the disk is started, the support arm moves from the fixed portion to above the disk surface in parallel with the main surface of the disk. With this configuration, since the floating force of the head is generated by the rotation of the disk, the slider does not come into contact with the disk even if the support arm is moved above the disk surface from the fixed portion.
[0014]
Further, a head support device of the present invention includes a head for performing at least one of recording and reproduction on a disk, a support arm having the head attached to one end, and a support arm attached to a main surface of the disk. A base arm provided with a rotation support portion for supporting the rotation in the vertical direction, and an elastic member provided between the support arm and the base arm for urging the support arm in the disk direction. A pressing portion is provided at the other end of the support arm to which the head is not attached. With this configuration, when the pressing portion is pressed, the slider separates from the disk and is securely fixed.
[0015]
Further, the head support device of the present invention has a configuration in which the other end of the support arm to which the head is not attached is bent, and a pressing portion penetrating through the base arm and projecting is provided. With this configuration, the pushing amount of the pressing portion can be adjusted by the gap between the arm plate and the base arm, so that the pushing portion is not excessively pushed, and the load between the slider and the disk can be removed by the pushing amount.
[0016]
In addition, the head support device of the present invention includes a pivot portion having at least one apex or an edge knife on a base arm in which the rotation support portion is in contact with the support arm, and a point where the apex of the pivot portion and the support arm abut. As a fulcrum, the support arm is configured to be rotatable in a direction perpendicular to the disk main surface. With this configuration, the center of rotation can be accurately determined, and when the pressing portion is pressed, the slider can be separated from the disk about the center of rotation as a fulcrum.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0018]
1 to 3 are views for explaining the detailed structure of the head support device 120. FIG. FIG. 1 is a perspective view showing the overall shape of the head support device, FIG. 2 is a cross-sectional view showing the vicinity of the rotation support portion, and FIG. 3 is an exploded perspective view of the head support device. Hereinafter, the head support device of the present embodiment will be described with reference to these drawings.
[0019]
As shown in FIG. 3, the leaf spring portion 4, the support arm 2, the pressing portion 129, and the arm plate 14, which are elastic members, are formed by processing a single plate material (for example, stainless steel). The leaf springs 4 are provided on both sides of the support arm 2, and these are connected at their ends to the extension 14 a of the arm plate 14. The leaf spring portion 4 and the extension portion 14a of the arm plate 14 are fixed to the base arm 12 at positions indicated by Q and S, for example, by laser welding.
[0020]
The base arm 12 is provided with a pivot portion composed of a pair of top portions 11a and 11b, and the pivot portion forms the rotation support portion 11. The support arm 2 is in contact with a pivot portion, which is a rotation support portion 11, is elastically held via a leaf spring portion 4, and can rotate only in a direction perpendicular to the surface of the disk 112. As shown in FIG. 3, the pair of tops 11 a and 11 b of the pivot portion, which is the rotation support portion 11, is in contact with the support arm 2 at two points indicated by Pa and Pb. The top may be a knife edge. Therefore, the end of the support arm 2 to which the slider 1 is fixed is urged toward the disk surface by the elastic force of the leaf spring portion 4, and compressive stress is generated at the contact points Pa and Pb. The line connecting the contact points Pa and Pb becomes the rotation axis. The slider 1 has a head 1011 mounted thereon.
[0021]
The support arm 2 has a pressing portion 129 formed by bending an end of the support arm 2 opposite to the end to which the slider 1 is fixed with reference to the rotation support portion 11. Then, as shown in FIG. 1, the pressing portion 129 penetrates the base arm 12 and protrudes. In addition, as shown in FIG. 3, the tops 11 a and 11 b of the pivot part, which is the rotation support part 11, are on a line perpendicular to the longitudinal center line (AA line) of the support arm 2, and It is arranged at a position symmetrical with respect to this center line (AA line). Therefore, during the operation of the magnetic recording / reproducing apparatus, that is, when the slider 1 is flying above the disk 112, the urging force on the slider 1 is applied to the support arm 2 by the tops 11a and 11b of the rotation support portion 11. Caused by compressive stress.
[0022]
Further, as shown in FIG. 2, when the pressing portion 129 is pushed toward the base arm 12 by the force of F1, the support arm 2 is applied with the rotation support portion 11 as a fulcrum, and the force of F2 is applied to the slider 101 side. A distance from the disk 112 occurs.
[0023]
As described above, since the head support device 120 of the present invention is made of a highly rigid material, the head support device 120 is less likely to vibrate. In addition, since the pressing portion 129 penetrates the base arm 12 and protrudes, the pressing portion 129 can be reliably pressed by applying a force. Further, since the support arm 2 is rotatably supported by the rotation support portion 11, when the pressing portion 129 at one end of the support arm 2 is pressed, the slider 1 at the other end can be securely separated from the disk 112. .
[0024]
Further, since the pressing portion 129 penetrates the base arm 12, the pressing amount of the pressing portion 129 can be adjusted by the gap between the arm plate 14 and the base arm 12, and the pressing portion 129 is not excessively pressed. Then, the load between the slider 1 and the disk 112 can be removed by the pressing amount of the pressing portion 129.
[0025]
Further, even when the slider 1 is separated from the disk 112 and jumps due to excessive impact force or the like when the slider 1 is present on the disk 112, the pressing portion 129 contacts the base arm 12 and the jump height of the slider 1 Can be regulated.
[0026]
FIG. 4 is a perspective view of a main part of the disk device according to the embodiment of the present invention. This disk device uses the above-described head support device 120, and the same elements as those in FIGS. 1 to 3 are denoted by the same reference numerals.
[0027]
The head support device 120 is rotatably supported around the bearing 105 and can be positioned at a predetermined track position on the disk 112 by driving the drive unit 122. A head driving device 124 is composed of the head support device 120, the bearing 105, and the driving means 122. As described above, the pressing portion 129 protrudes from the head support device 120. The fixing portion 128 is located parallel to the main surface of the disk 112 from the outer circumferential direction to the inner circumferential direction of the disk 112, and has a tapered shape that is thinner in the inner circumferential direction of the disk 112 and thicker in the outer circumferential direction. In addition, as the driving unit 122, for example, a voice coil motor can be used.
[0028]
Further, the disk 112 can be rotated at a predetermined rotation speed by the rotation driving means 109. As the rotation driving means 109, for example, a spindle motor can be used. The housing 126 holds them in a predetermined positional relationship and is sealed with a lid (not shown) to prevent the deterioration of the disk 112 and the head due to external corrosive gas and dust.
[0029]
Next, when the rotation of the disk 112 is stopped, the head support device 120 including the support arm 2 rotates around the bearing 105 toward the outer periphery of the disk 112 (U direction in FIG. 1), and the pressing portion 129 rotates the disk 112. It contacts the tapered portion 128a of the fixed portion 128 located outside. As described above, since the fixing portion 128 is tapered, the pressing portion 129 is smoothly pressed by the fixing portion 128. When the pressing section 129 is pressed, a distance between the slider (not shown) and the disk 112 is generated. Thereafter, the rotation of the disk 112 stops.
[0030]
When the rotation of the disk 112 is started, first, after the disk 112 reaches a predetermined number of rotations, the head support device 120 including the support arm 2 rotates from the fixed portion 128 in the inner circumferential direction of the disk 112 (V in FIG. 1). Direction) and is positioned at a predetermined track position.
[0031]
Note that a stopper may be provided on the tapered portion 128a of the fixed portion. By providing the stopper, the pressing portion 129 stops at an appropriate portion of the tapered portion 128a. Therefore, the pressing portion 129 stops short of the pressing portion, and the pressing force is insufficient, and the head supporting device 120 is not excessively applied with excessive force.
[0032]
Further, as a method of pressing the pressing portion 129, in the present embodiment, a method of pressing with the fixing portion 128 arranged near the outer peripheral portion of the disk 112 has been described. A method in which a pressing means such as a memory alloy is provided and pressed may be used.
[0033]
With the head support device 120 and the disk device using the same as described above, the pressing portion 129 of the head support device 120 is reliably pressed by the fixing portion 128. When the rotation of the disk is stopped, the slider can be reliably separated from the disk 112 and fixed. In addition, the head support device 120 is positioned at a predetermined track position without contact between the slider and the disk 112 at the start of rotation.
[0034]
FIG. 5 is a cross-sectional view of main parts when the rotation of a disk device that performs recording and reproduction on both surfaces of two disks 112 using four head support devices 120 is stopped. Here, the same elements as those in FIGS. 1 to 4 are denoted by the same reference numerals.
[0035]
The fixing portion 128 is provided with a tapered portion 128 a at a position corresponding to the pressing portion 129 of each support arm 2. When the rotation is stopped, the pressing portion 129 of each support arm 2 is pressed by the tapered portion 128a, and each slider 1 is separated from the disk 112 and fixed.
[0036]
As described above, even in a disk device having a double-sided disk for performing recording and reproduction of a plurality of sheets, all the sliders can be reliably separated from the disk and fixed when the rotation is stopped.
[0037]
Note that, in the embodiment of the present invention, there is no limitation on the method of manufacturing each member or the method of connecting each member. The support arm 2 may be formed by an etching method or a press working method. Forming, press working, sputter deposition and the like can also be used for forming the pivot portion.
[0038]
Further, in the embodiment of the present invention, the leaf spring portion, the support arm, and the arm plate are manufactured by processing one plate, but the present invention is not limited to this, and may be manufactured separately. For example, it may be assembled by laser welding. In the case of such a method, the optimum material and thickness can be respectively selected for the support arm and the leaf spring portion.
[0039]
Further, in the embodiment of the present invention, the head supporting device of the magnetic recording / reproducing device using the magnetic head has been described. However, the head supporting device of the present invention is a non-contact type disk recording / reproducing device, for example, an optical disc device or the like. The same effect is obtained when used as a head support device for a magneto-optical disk device or the like.
[0040]
Further, in the embodiment of the present invention, the pivot portion including the pair of tops is described as the rotation support portion, but the present invention is not limited to this. There may be only one top. In this case, a structure that rotates only in the vertical direction can be easily realized if the operation is restricted by the operation of both the pivot portion and the elastic member.
[0041]
Further, in the embodiment of the present invention, a configuration in which the head is mounted on the slider has been described, but the present invention is not limited to this, and a configuration in which the head is directly fixed to the support arm may be used. .
[0042]
【The invention's effect】
As described above, the disk device of the present invention includes a disk holding a recording medium, a head for performing at least one of recording and reproduction on the disk, and a support arm having the head attached to one end. And a base arm provided with a rotation support portion for supporting the support arm so as to be rotatable in a direction perpendicular to the main surface of the disc, and a support arm provided between the support arm and the base arm in the direction of the disc. An elastic member for applying an urging force and a pressing means for pressing a pressing portion at the other end different from the one end having the head of the support arm are provided.
[0043]
With this configuration, since the support arm can be provided directly on the base arm, it is possible to independently provide a portion having a rigid body and a portion having elasticity. As a result, the support arm portion can be formed of a highly rigid member, and the support arm is less likely to vibrate. Further, by pressing the pressing portion by the pressing means, the slider can be fixed away from the disk surface, so that when the disk rotation is stopped, the slider is securely fixed, and the slider and the disk do not collide against external impact. This has a great effect that a disk device and a head support device having high impact resistance can be realized.
[Brief description of the drawings]
FIG. 1 is a perspective view showing the overall shape of a head support device according to an embodiment of the present invention; FIG. 2 is a cross-sectional view of the vicinity of a rotation support portion of the head support device according to the embodiment; FIG. 4 is an exploded perspective view of a head support device in FIG. 4; FIG. 5 is a perspective view of a main part of a disk device in the embodiment; FIG. FIG. 6 is a schematic perspective view showing the configuration of a conventional L / UL magnetic recording / reproducing apparatus.
1,101 slider 2 support arm 4,103 leaf spring (elastic member)
11 pivot part (rotation support part)
11a, 11b Top 12 Base arm 14 Arm plate 14a Extension 102 Suspension 104 Arm 105 Bearing 106 Driving means 108, 120 Head support device 109 Rotation driving means 110 Arm fixing part 110a, 128a Tapered part 112 Disk 113 Tab 122 Driving means 124 Head driving device 126 Housing 128 Fixed portion 129 Pressing portion 1011 Head

Claims (8)

A disk holding a recording medium,
A head that performs at least one of recording and reproduction on the disc;
A support arm having the head attached to one end,
A base arm provided with a rotation support portion that supports the support arm so as to be rotatable in a direction perpendicular to the disk main surface,
An elastic member provided between the support arm and the base arm to apply an urging force for urging the support arm in the disk direction;
Pressing means for pressing a pressing portion at the other end of the support arm to which the head is not attached. A fixed portion disposed near the outer peripheral portion of the disk,
2. The disk device according to claim 1, wherein the support arm moves in the direction of the fixed portion in parallel with the main surface of the disk, and comes into contact with the fixed portion, and the pressing means presses the pressing portion. The disk device according to claim 2, wherein the fixing portion has a taper shape parallel to a main surface of the disk, the thickness being thin in an inner circumferential direction of the disk, and being thick in an outer circumferential direction of the disk. 4. The disk device according to claim 2, wherein when the rotation of the disk is stopped, the rotation of the disk is stopped after the pressing unit presses the pressing portion. 4. The disk according to claim 2, wherein, when the rotation of the disk is started, after the rotation of the disk is started, the support arm moves from the fixed portion to above the disk surface in parallel with the main surface of the disk. Disk device. A head for performing at least one of recording and reproduction on the disc,
A support arm having the head attached to one end,
A base arm provided with a rotation support portion that supports the support arm so as to be rotatable in a direction perpendicular to the disk main surface,
An elastic member provided between the support arm and the base arm to apply an urging force for urging the support arm in a disk direction;
A head support device having a pressing portion at the other end of the support arm where the head is not attached. 7. The head support device according to claim 6, wherein the other end of the support arm to which the head is not attached is bent, and a pressing portion penetrating the base arm and projecting is provided. The pivot support portion includes a pivot portion having at least one apex or a knife edge on the base arm that is in contact with the support arm. 7. The head support device according to claim 6, wherein the support arm is configured to be rotatable in a direction perpendicular to the disk main surface.

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