WO2006115160A1 - ヘッド支持装置およびそれを備えたディスク装置 - Google Patents
ヘッド支持装置およびそれを備えたディスク装置 Download PDFInfo
- Publication number
- WO2006115160A1 WO2006115160A1 PCT/JP2006/308284 JP2006308284W WO2006115160A1 WO 2006115160 A1 WO2006115160 A1 WO 2006115160A1 JP 2006308284 W JP2006308284 W JP 2006308284W WO 2006115160 A1 WO2006115160 A1 WO 2006115160A1
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- WIPO (PCT)
- Prior art keywords
- head support
- voice coil
- center
- horizontal rotation
- axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
- G11B5/5569—Track change, selection or acquisition by displacement of the head across disk tracks details of specially adapted mobile parts, e.g. electromechanical control devices
Definitions
- Head support device and disk device including the same
- the present invention relates to a head support device used in a disk device having a floating type head, in particular, a head support device having a structure for stabilizing frequency characteristics at a resonance frequency, and a disk using the head support device. Relates to the device.
- a head support device having high flexibility and extremely high impact resistance while applying a necessary and sufficient load load to the head, it rotates in a direction parallel to the surface of the recording medium around a horizontal rotation axis.
- a head support device that can move and can rotate in a direction perpendicular to the surface of a recording medium about a vertical rotation axis.
- a head support device in a magnetic disk device such as a hard disk device will be described with reference to the drawings as an example of a head support device of a disk device having a conventional floating type head.
- FIG. 22 is a plan view showing the main part of a magnetic disk drive equipped with a conventional head support device.
- FIG. 23 is a side view showing the configuration of the head support device used in this magnetic disk device.
- FIG. 24 is a plan view showing a configuration of a head support arm portion which is a part of the head support device, and
- FIG. 25 is an exploded perspective view thereof. In FIG. 22, the upper lid is removed and the upper yoke is partially omitted.
- a recording medium 4 having a recording medium layer formed thereon is placed on a rotor hub portion 3 fixed to a rotating shaft 2 of a spindle motor (not shown) that rotates around a rotation center 1.
- a head support arm portion 221 that is a signal conversion element swinging arm is pivotally supported around a horizontal rotation shaft 5 via a bearing 6 so as to be rotatable.
- the head support arm portion 221 is configured to be capable of horizontal rotation in a direction substantially parallel to the surface of the recording medium 4 with the axis 5a of the horizontal rotation shaft 5 as the rotation center of the horizontal rotation shaft.
- a tab portion 8a is formed at one end of the head support arm 8 in the head support arm portion 221, and a signal is transmitted from the tab portion 8a to the horizontal rotation shaft 5 side via a gimbal mechanism (not shown). Transformation element A head slider 9 on which a magnetic head (not shown) as a child is mounted is provided. A voice coil 10 is disposed at the end opposite to the tab portion 8a with the horizontal rotation shaft 5 as a reference. With this voice coil 10, the head support arm 221 can rotate in the radial direction of the recording medium 4 in the direction parallel to the surface thereof with the horizontal rotation shaft 5 as the center.
- the upper yoke 222 to which the magnet 11 is fixed is positioned above the voice coil 10 so as to face the voice coil 10, that is, against the head support arm portion 22 1 provided with the voice coil 10, the recording medium 4. It is fixed to the chassis or other housing (not shown) on the opposite side.
- the lower yoke 223 is positioned below the voice coil so as to face the voice coil 10, that is, to the head support arm portion 221 provided with the voice coil 10, or to the chassis or other position located on the recording medium 4 side. It is attached to the chassis of The lower yoke 223 and the upper yoke 222 are configured so as to sandwich the voice coil 10 therebetween.
- a voice coil motor (hereinafter referred to as VCM (Voice Coil Motor)) is configured by the voice coil 10, the magnet 11 facing the voice coil 10, the upper yoke 222 and the lower yoke 223 to which the magnet 11 is fixed.
- VCM Voice Coil Motor
- a head support device shown in FIG. 23 is provided by a head support arm portion 221 and a magnet 11 and a lower yoke 223 which are fixed to the upper yoke 222 and face the voice coil 10 provided on the head support arm portion 221. 220 is configured.
- a lamp block 15 having a lamp portion 14 provided with a guide portion is attached to a chassis or other housing.
- a tab portion 8a provided on the head support arm portion 221 contacts the ramp portion 14 of the ramp block 15 to guide the head support arm portion 221 up and down.
- the VCM is activated, and the head support arm 221 can be rotated in the radial direction of the recording medium 4.
- the head support arm 221 rotates around the horizontal rotation shaft 5 and moves on the data recording area of the rotating recording medium 4.
- the head support arm 221 is rotated clockwise to be in the retracted position.
- the lamp unit 14 is rotated to a predetermined position.
- crash stops 16 and 17 are provided on the chassis or the casing or other structural members. Being
- the head support arm 8 having a tab portion 8a at one end and a hole portion 8b (see FIG. 25) at one end has a gimbal mechanism 21 on the tab portion 8a side.
- a head slider 9 on which a magnetic head (not shown) is mounted is disposed via the.
- a dimple 8c is provided on the lower surface of the head support arm 8 so as to contact the vicinity of the center portion of the head slider 9.
- the head slider 9 is attached to the head support arm 8 via a gin-no mechanism 21.
- the gimbal mechanism 21 operates the magnetic disk device by bringing the dimple 8c into contact with the substantially central portion of the upper surface of the head slider 9 (the surface opposite to the surface on which the magnetic head is mounted). Sometimes the head slider 9 can flexibly follow the recording medium 4 in vibrations in the roll direction or pitch direction.
- the voice coil 10 is attached to a coil holder 224 having a hole 224a to form a voice coil 225.
- the head support arm 8 and the voice coil unit 225 are not limited to the forces described as separate members, but are a single unit.
- one end of a substantially annular leaf spring portion 24 that is an elastic portion is fixed to the lower surface of the head support arm 8 (the surface on the side where the head slider 9 is disposed), and further the plate A substantially semi-annular spring fixing member 25 is fixed to the upper surface of the other end of the spring portion 24 (the same surface as that fixed to the head support arm 8).
- the cylindrical bearing portion 27 with a hollow collar includes a flange 27a, a screw portion 27b, and a cylindrical portion 27c.
- the flange 27a has an outer diameter larger than the inner diameter of the hole 26c of the pivot bearing 26 having a pair of pivots 26a and 26b.
- the screw portion 27b has an outer diameter smaller than the inner diameter of the hole portion 26c of the pivot bearing 26.
- the cylindrical part 27c Provided between the screw 27a and the threaded portion 27b, and has an outer diameter that fits into the hole 26c of the pivot bearing 26.
- the threaded portion 27b of the bearing portion 27 includes a hole portion 26c of the pivot bearing 26, a substantially semi-annular inner side of the spring fixing member 25, a substantially annular inner side of the leaf spring portion 24, and a hole portion 22 of the coil holder 224. Penetrate 4a. Further, from the opposite side to the flange 27a, the arrangement is such that the projecting portion 28a of the substantially annular collar 28 is located on the flange 27a side of the bearing portion 27, and the collar 28 is fitted to the cylindrical portion 27c of the bearing portion 27. Inserted.
- the collar 28 has an inner diameter that fits into the cylindrical portion 27c and an outer diameter that penetrates the hole 224a of the coil holder 224, and is substantially the same shape as the spring fixing member 25 fixed to the substantially annular leaf spring portion 24.
- the upper surface 28b of the projecting portion 28a abuts on the flat portion of the leaf spring portion 24 to which the substantially semi-annular spring fixing member 25 is fixed, and these are connected by the flange 27a and the nut 29 of the bearing portion 27. And held together.
- the head support arm portion 221 is configured.
- the upper yoke 222 and the lower yoke 223, to which the magnet 11 is fixed are fixed to a chassis or a case or other structural member (not shown) to support the head.
- the voice coil 10 constituting the arm portion 221 is located with a space between the magnet 11 and the lower yoke 223.
- the head support arm 8 has its tab portion 8a on the lower side with a line connecting the contact points P1, P2 of the pair of pivots 26a, 26b of the pivot bearing 26 and the upper surface of the head support arm 8 as fulcrums, That is, it acts so as to be pushed down in the four directions of the recording medium. That is, as shown in FIG. 24, the head support arm 8 is configured to be rotatable in a direction perpendicular to the surface of the recording medium 4 with a line connecting the contact points Pl and P2 as a vertical rotation shaft 30. .
- the load load of the head slider 9 is such that the leaf spring portion 24 of the pair of pivots 26a and 26b of the pivot bearing 26 is in contact with the head support arm 8 by the contact points P1 and P2. It is caused by compressive stress in the four directions of the recording medium as a reaction force due to deformation. As a result, a constant gap is maintained between the head slider 9 having the magnetic head and the recording medium 4 by the relationship between the urging force in the recording medium 4 direction applied to the head slider 9 and the levitation force in the opposite direction. Thus, recording / reproduction of the magnetic disk device is performed.
- the vertical rotation shaft 30 has a horizontal rotation shaft 5 serving as a horizontal rotation shaft for rotating the head support arm portion 221 shown in FIG. 22 in a direction parallel to the surface of the recording medium 4. It is formed so as to pass through the axis 5a and to be perpendicular to the longitudinal center line 8d of the head support arm 8.
- the two contact points Pl and P2 are arranged symmetrically with respect to the axis 5a of the horizontal rotation shaft 5, and the midpoint of the line connecting the two contact points Pl and P2 is the horizontal rotation shaft. It is desirable to match the axial center 5a.
- the head support arm 8 constituting the head support device 220 rotates in the direction perpendicular to the surface of the recording medium 4 with the line connecting the contact points Pl and P2 of the pivots 26a and 26b as the center.
- the head slider 9 mounted on the head support arm 8 is biased toward the recording medium 4 by the elastic force of the leaf spring portion 24.
- the present invention can increase rigidity and increase the resonance frequency very much, and can provide a stable load load with high flexibility and a large impact resistance.
- the present invention solves the above-mentioned problems while maintaining the performance of the present invention, enables miniaturization, and provides a head support device that is stable at the resonance frequency.
- the size of the disk unit can be reduced and the head positioning control characteristics can be improved. Can be moved to the target track position at high speed, and a highly reliable disk drive with greatly reduced access time is provided.
- a head support device of the present invention includes a head slider having a signal conversion element, a head support arm having a head slider connected to one end thereof, and the head support arm rotating in a direction parallel to the surface of the recording medium.
- the voice coil fixed to the coil holder that rotates integrally with the head support arm at the end opposite to the head slider with respect to the axis of the horizontal rotation axis to be moved, and the head support arm perpendicular to the recording medium surface Opposite to the voice coil and a pair of pivots forming a vertical rotation shaft that rotates in the direction, an elastic portion that generates a load that urges the head slider toward the recording medium surface about the vertical rotation shaft
- a magnet disposed in the axial direction of the horizontal rotation shaft and a yoke disposed opposite to the magnet side and facing the voice coil, and disposed in the axial direction of the horizontal rotation shaft,
- the first plane perpendicular to the axial direction of the horizontal rotation axis including the center of gravity of the center of gravity setting portion of
- FIG. 1 is a plan view showing a main part of a magnetic disk device according to Embodiment 1 of the present invention.
- FIG. 2 is a plan view showing a head support arm portion in the first embodiment.
- FIG. 3 is a developed side view showing the main configuration of the head support device in the first embodiment.
- FIG. 4 is a plan view of a voice coil unit according to the first embodiment.
- FIG. 5 is a plan view showing a voice coil and a magnet according to the first embodiment.
- FIG. 6A is a graph showing the relationship between the rotation angle of the head support device and the rotational torque due to VCM in the first embodiment.
- FIG. 6B is a graph showing the relationship between the rotation angle of the head support device and the vertical torque due to VCM in the first embodiment.
- FIG. 7 is a graph showing frequency characteristics of the head support device in the first embodiment.
- FIG. 8A is a partial plan view showing the centroid position of the centroid setting portion in another example of the voice coil unit according to the first embodiment.
- FIG. 8B is a developed side view showing the main configuration of the head support device including the voice coil section shown in FIG. 8A.
- FIG. 9 is a graph showing frequency characteristics for another example of the head support device in the first embodiment.
- FIG. 10 is a graph showing the relationship between the centroid position of the centroid setting portion of the voice coil unit and the phase in the frequency characteristics in the first embodiment.
- FIG. 11 is a plan view showing another example of the voice coil unit according to the first embodiment.
- FIG. 12 is a plan view showing a head support arm portion and a magnet according to Embodiment 2 of the present invention.
- FIG. 13 is a developed side view showing the configuration of the head support device in the second embodiment.
- FIG. 14 is a graph showing the relationship between the rotation angle of the head support device and the vertical torque by VCM in the second embodiment.
- FIG. 15 is a plan view showing a head support arm portion and a magnet in Embodiment 3 of the present invention.
- FIG. 16 is a developed side view showing the configuration of the head support device in the third embodiment.
- FIG. 17 is a plan view of the head support arm portion showing the centroid position of the centroid setting portion in another example of the voice coil portion of the third embodiment.
- FIG. 18 is a plan view showing a head support arm portion and a magnet in Embodiment 4 of the present invention.
- FIG. 19 is a developed side view showing the configuration of the head support device in the fourth embodiment.
- FIG. 20 shows a center-of-gravity setting portion in another example of the voice coil unit according to the fourth embodiment. It is a top view of the head support arm part which shows the gravity center position.
- FIG. 21 is a side view showing another example of the formation of the vertical rotation shaft in the first to fourth embodiments of the present invention.
- FIG. 22 is a plan view showing the main part of the configuration of a conventional magnetic disk device.
- FIG. 23 is a side view showing a configuration of a conventional head support device.
- FIG. 24 is a plan view showing a configuration of a conventional head support arm portion.
- FIG. 25 is an exploded perspective view showing a configuration of a conventional head support arm portion.
- FIGS. 1 to 11 are diagrams for explaining a head support device and a disk device including the head support device according to Embodiment 1 of the present invention.
- FIG. 1 is a plan view showing the main part of the magnetic disk device. In FIG. 1, the upper lid is removed and the upper yoke is partially omitted.
- FIG. 2 is a plan view showing the head support arm portion.
- FIG. 3 is a developed side view showing the main structure of the head support device, in which the X—O—X line shown in FIG. 2 is developed in a straight line. However, FIG. 2 shows only the head support arm portion, and FIG. 3 shows the head support device shown in FIG.
- a head support arm portion 7 that is freely rotatable in the horizontal direction and is a signal conversion element swing arm is pivotally supported on a housing 18 by an axis 5 a of a horizontal pivot shaft 5.
- the head support device 50 includes a head support arm portion 7, a magnet 11, an upper yoke 12, and a lower yoke 13.
- the head support arm unit 7 can be horizontally rotated via a bearing 6 around the horizontal rotation axis 5 in a direction substantially parallel to the surface of the recording medium 4 with the axis 5a of the horizontal rotation axis 5 as the horizontal rotation center. Is pivotally supported.
- the magnet 11 is arranged facing the voice coil 10 in the direction above the voice coil 10 constituting the head support arm portion 7 (on the opposite side of the recording medium 4 in the direction of the axis 5a of the horizontal rotation shaft 5).
- the upper yoke 12 is configured by adhering a magnet 11.
- the magnetic disk device according to the first embodiment differs from the magnetic disk device described in the prior art in the configuration of the head support device 50. Therefore, a detailed description of the configuration of the magnetic disk device is omitted.
- the head support device 50 is formed in the longitudinal direction of the head support arm 8.
- the core wire 8d and the center line 10a of the voice coil 10 are configured to intersect at a certain angle ⁇ . Further, with this configuration, the arrangement position of the magnet 11 constituting the VCM is different from the conventional arrangement position.
- the center line 10a in the circumferential direction of the voice coil 10 does not coincide with the center line 8d in the longitudinal direction of the head support arm 8 (including its extension line). (Overlapping ⁇ ) o That is, the center line 8d in the longitudinal direction of the head support arm 8 and the center line 10a in the rotational circumferential direction of the voice coil 10 have an angle ⁇ in the clockwise direction with the axis 5a as the center. is doing.
- the voice coil portion 23 composed of the coil holder 22 and the voice coil 10 is fixed to the head support arm 8 so as to have such an angle ⁇ .
- the angle ⁇ is set so that the rotation of the voice coil unit 23 is not hindered and the casing can be downsized.
- FIG. 4 is a plan view of the voice coil unit. As shown in FIG. 4, the portion on the voice coil 10 side from the dashed-dotted line 41 (the portion in the direction of the arrow in the dashed-dotted line 41) is not symmetrical with respect to the center line 8d of the head support arm 8 in the voice coil portion 23.
- this part is referred to as the center-of-gravity setting part.
- Positional force of the center of gravity 42 of this center-of-gravity setting part Centered on the axis 5a of the pivot axis 5a on the center line 8d of the head support arm 8 or horizontally as shown in FIG.
- a built-up portion 22a is formed on one side edge of the coil holder 22 so as to be a little away in the counterclockwise direction.
- the head support arm 8 and the voice coil unit 23 are not limited to the force described as separate members, and may be a single unit.
- the head support arm portion 7 is sandwiched between the bearing portion 27 and the nut 29 via the collar 28 together with the pivot bearing 26 having a pair of pivots 26a and 26b.
- the voice coil portion 23 is fixed so that the center line 10 a of the voice coil 10 has an angle ⁇ with respect to the center line 8 d of the head support arm 8.
- the rest of the configuration is the same as that of the head support arm portion 221 described in the related art, and the description thereof is omitted.
- the load load of the head slider 9 is generated by a force acting in the direction of the recording medium 4 as a reaction force due to the deformation of the leaf spring portion 24 by the respective contact points Pl and P2. This Due to the relationship between the urging force in the four directions of the recording medium 9 applied to the slider 9 and the levitation force in the opposite direction, the head slider 9 floats, and a constant gap is formed between the head slider 9 having the magnetic head and the recording medium 4. The recording and reproduction of the magnetic disk device is performed while maintaining the above.
- the lines connecting the contact points Pl and P2 at which the pivots 26a and 26b contact the upper surface of the head support arm 8 are such that the vertical rotation shaft 30 passes through the axis 5a of the horizontal rotation shaft 5 and
- the head support arm 8 is formed to be perpendicular to the longitudinal center line 8d.
- the contact points Pl and P2 are arranged symmetrically with respect to the axis 5a of the horizontal rotation shaft 5, and the midpoint of the line connecting the two contact points P1 and P2 is set to the horizontal rotation shaft 5. It is desirable to match the axis 5a.
- the head support arm portion 7 is configured as described above, and the head support arm 8 can be formed of a rigid high-strength material. Therefore, it is possible to improve the impact resistance against a large external impact. Furthermore, the resonance frequency of the head support arm can be increased, and the head support device can be rotated and positioned at high speed.
- the leaf spring portion 24 that is an elastic portion is provided as a separate member independent of the head support arm 8 that is not integrally formed as a single member as the head support arm 8. For this reason, the conflicting demands of reducing the spring constant that increases the load load on the head slider 9 and increasing the rigidity of the structure can be realized independently as actions of the respective components. it can. Further, since the thickness, material, etc. of the leaf spring portion 24 can be set independently, the strength and spring constant of the leaf spring portion 24 can be set to predetermined values. As a result, the design of the head support device 50 can be simplified, and the degree of freedom of design can be greatly expanded. If there is no problem in design, the leaf spring portion 24 and the head support arm 8 may be integrally formed.
- FIG. 1 the state when the magnetic head is at the innermost peripheral portion of the recording region R in the recording medium 4, that is, when the coil holder 22 is in a position where it abuts against the other crash stop 16, A partial shape of the outer peripheral edge of the holder 22 is indicated by a two-dot chain line 22b. At this time, the coil holder 22 comes closest to the side surface 18a of the housing 18 or the side surface of the cover (not shown). In this state, the distance d2 in the direction perpendicular to the side surface 18a of the housing 18 between the outer peripheral portion of the coil holder 22 and the axis 5a of the horizontal rotation shaft 5 is the distance dl described in the prior art (FIG. 22). (Refer to) Therefore, by using such a head support device 50 for a magnetic disk device, it is possible to reduce the size of the magnetic disk device.
- FIG. 5 is a plan view showing the voice coil and the magnet as viewed from the magnet side constituting the VCM. As shown in FIG. 5, the center line 10a in the rotational circumferential direction of the voice coil 10 in the head support arm 7 when the magnetic head (not shown) is located at the outermost peripheral position of the recording area R of the recording medium 4
- the magnet 11 is magnetized so that the boundary 51 between the N pole (not shown) and the S pole (not shown) of the magnet 11 matches.
- the head support arm portion 7 When current is supplied to the voice coil 10, the head support arm portion 7 is rotated by the VCM, and a magnetic force based on Fleming's law works between the voice coil 10 and the magnet 11.
- the direction of rotation of the head support arm portion 7 is determined by the direction of the current to the magnetic coil 11 and the direction of the magnetic field lines of the magnet 11 facing the voice coil 10.
- the magnetic flux is directed from the N pole of the magnet 11 to the lower yoke 13, but is not necessarily perpendicular to the yoke, and the magnetic flux reaches the lower yoke 13 by spreading the N pole as much as possible.
- the magnetic flux converges from the lower yoke 13 toward the S pole of the magnet.
- the force acting on the voice coil 10 acts perpendicularly to the magnetic flux according to the framing law. Therefore, the voice coil 10 has a repulsive force with respect to the magnet 11 in the direction of the axis 5a of the horizontal rotation shaft 5! /, And a vertical torque component acting as an attractive force acts.
- FIG. 6A and 6B show the rotational torque component to the head support arm portion 7 generated by the VCM and the vertical torque of the voice coil 10 by the magnet 11 when a constant current is applied to each voice coil 10.
- An example of a component is shown.
- the position of the center line 8d of the head support arm 8 when the magnetic head is located at the outermost peripheral position OD of the recording area of the recording medium 4 is the origin in the horizontal axis direction, and the recording medium starts from that position.
- the vertical axis in FIG. 6A represents the rotational torque component that rotates the head support device 50 in the loading direction as the + (plus) side, and the rotational torque component in the unloading direction as the ⁇ (minus) side. Is displayed.
- the vertical torque component on the vertical axis in Fig. 6B shows the positive (+) side when the magnetic force acting between the voice coil 10 and the magnet 11 is the repulsive force, and the negative (-) side when the attractive force is It is said.
- a curve 61 indicated by a solid line indicates a rotational torque component in the loading direction
- a curve 62 indicated by a broken line indicates a rotational torque component in the unloading direction
- a curve 63 indicated by a solid line indicates a vertical torque component due to a magnetic force acting between the voice coil 10 and the magnet 11 during rotation in the loading direction
- a curve 64 indicated by a broken line indicates a rotation in the unloading direction. The vertical torque component acting between the voice coil 10 and the magnet 11 during the movement is shown.
- the head support arm portion 7 is caused by the vertical torque component of the magnetic force generated between the voice coil 10 and the magnet 11.
- the voice coil section 23 is a small amount with the vertical rotation shaft 30 as a fulcrum. As a result, a bending resonance mode of the voice coil unit 23 is generated.
- the position of the center of gravity 42 of the center of gravity setting portion of the voice coil portion 23 (that is, the portion that is not symmetrical with respect to the longitudinal center line 8d of the head support arm 8 in the voice coil portion 23). Is on the recording medium 4 side in the direction of the axis 5a of the horizontal rotation shaft 5 with respect to a plane perpendicular to the horizontal rotation shaft 5 including the vertical rotation shaft 30.
- the voice coil unit 23 composed of the voice coil 10 and the coil holder 22 hangs in the direction of the axis 5a of the horizontal horizontal rotation shaft 5 including the center of gravity 42 of the center of gravity setting portion of the voice coil unit 23.
- the first straight plane is a distance from the second plane perpendicular to the axis 5a direction of the horizontal rotation axis 5 including the vertical rotation axis in the direction 5a of the horizontal rotation axis 5. It is composed of
- the position of the center of gravity 42 slightly changes with respect to the vertical rotation shaft 30 of the head support arm portion 7, and the head support arm portion 7 is subjected to a force to rotate about the axis 5a. Therefore, the resonance frequency in the frequency characteristic of the head support device 50 is affected.
- the voice coil portion 23 indicated by a solid line in FIG. 4 has a build-up portion 22a at the side edge portion on the counterclockwise side of the coil holder 22 around the axis 5a of the horizontal rotation shaft 5. Is formed.
- the position of the center of gravity 42 of the center of gravity setting portion of the voice coil unit 23 is slightly counterclockwise about the axis 5a of the horizontal rotation shaft 5 with respect to the longitudinal center line 8d of the head support arm 8. It will be a distant position.
- FIG. 7 shows frequency characteristics of the head support device 50 having such a voice coil unit 23.
- FIG. 8A is a partial plan view showing the centroid position of the centroid setting portion in another example of the voice coil unit according to the embodiment.
- FIG. 8B is a developed side view showing the main configuration of the head support device including the voice coil section shown in FIG. 8A.
- the head support device 90 is configured so that the position force of the center of gravity 84 of the center of gravity setting portion on the voice coil 10 side of the voice coil 82 from the two-dot chain line 83 is the center of the voice coil 10 It is in the vicinity of the line 10a and is located away from the center line 8d in the longitudinal direction of the head support arm 8 in the clockwise direction around the axis 5a of the horizontal rotation shaft 5.
- the voice coil unit 82 includes a coil holder 81 and a voice coil 10.
- FIG. 9 shows the frequency characteristics of such a head support device 90.
- the configuration shown in FIG. 4 includes a two-dot chain line 43 trowel, and the voice coil portion 23 composed of the coil holder 22 and the voice coil 10 with respect to the center line 1 Oa of the voice coil 10 in the circumferential direction of rotation. This is the case of a symmetric shape.
- the above-mentioned head support devices 50 and 90 each had a resonance point at a frequency of approximately 1.8 kHz. Furthermore, at this resonance point, This phase is a phase advance, that is, a + (plus) phase in the head support device 50, and the value of the phase advance is very small. On the other hand, in the head support device 90, the phase lag, that is, the (minus) phase, and the value of the phase lag was large.
- FIG. 10 shows a line connecting the position of the center of gravity 42 of the center of gravity setting portion of the voice coil unit 23 and the axis 5a of the horizontal rotation shaft 5 and the center line 8d of the head support arm 8 on the voice coil unit 23 side.
- 5 is a diagram showing the results of obtaining the relationship of the phase at the resonance frequency of the head support device 50 with respect to the angle ⁇ , where ⁇ is the angle formed by.
- the counterclockwise angle ⁇ around the axis 5a is + (plus)
- the clockwise angle ⁇ is-(minus).
- the + (plus) side indicates phase advance and the-(minus) side indicates phase delay.
- the position of the center of gravity 42 of the center of gravity setting portion is set to an appropriate position, that is, the center line in the longitudinal direction of the head support arm 8 It is desirable to set it so as to be positioned counterclockwise on the center line 8d of the head support arm 8 on the center of the axis 5a of the horizontal rotation shaft 5 or 8d.
- the influence of the magnetic force generated between the voice coil 10 and the magnet 11 on the frequency characteristics of the head support device 50 is reduced, and the phase characteristics in the frequency characteristics of the head support device 50 are reduced. It can be a phase advance. Therefore, a stable position servo characteristic can be realized as a head support device, the seek operation can be stabilized, and the head positioning accuracy can be improved.
- the position of the center of gravity 42 of the center of gravity setting portion of the voice coil unit 23 is set after taking into account variations in the members constituting the voice coil unit 23. Set at least counterclockwise about the axis 5a of the horizontal rotation shaft 5 with respect to the center line 8d of the head support arm 8 so as to minimize the build-up portion 22a. That's fine.
- the position of the center of gravity of the total mass of the part that is in contact with the head support arm 8, the gimbal mechanism 21 and the head slider 9 is the position of the pair of pivots 26a and 26b provided on the pivot bearing 26 that is in contact with the upper surface of the head support arm 8. It is preferable to configure so as to substantially coincide with a line connecting the respective contact points Pl and P2, that is, a plane including the vertical rotation shaft 30 (including its extension line) and the axis 5a of the horizontal rotation shaft 5.
- a balancer is added to make the position of the center of gravity of the member rotating around the vertical rotation shaft 30 substantially coincide with the plane including the axis 5a of the vertical rotation shaft 30 and the horizontal rotation shaft 5. May be. However, the position of the center of gravity 42 of the center of gravity setting portion in the voice coil unit 23 is located at least counterclockwise from the longitudinal center line 8d of the head support arm 8 with respect to the axis 5a of the horizontal rotation shaft 5. I have to.
- the center line 10a in the rotating circumferential direction of the voice coil 10 in the voice coil unit 23 passes through the axis 5a of the horizontal rotating shaft 5, and the head is supported around the axis 5a.
- the head support device 50 configured to have the angle ⁇ clockwise with respect to the longitudinal center line 8d of the arm 8 has been described.
- the present invention is not limited to this.
- FIG. 11 is a plan view showing another example of the voice coil unit according to the first embodiment.
- the head support device is configured such that the center line 10a in the rotational circumferential direction of the voice coil 10 is at an angle ⁇ counterclockwise with respect to the center line 8d of the head support arm 8 about the axis 5a.
- the center position of the center of gravity setting portion in the voice coil section may be at least at a position counterclockwise from the center line 8d of the head support arm 8 about the axis 5a of the horizontal rotation shaft 5.
- the head support device having such a configuration as shown in FIG.
- one side edge portion of the coil holder 111 that is, a side edge portion closer to the center line 8d of the head support arm 8 is formed on the side edge portion.
- the position force of the center of gravity 113 of the center of gravity setting portion of the voice coil unit 112 is configured to be at least counterclockwise from the center line 8d of the head support arm 8 about the axis 5a of the horizontal rotation shaft 5. Hope.
- the head support arm constituting the head support device can be formed of a highly rigid material. Therefore, the resonance frequency of the head support arm can be increased as well as the impact resistance against a large external impact or the like can be improved. Therefore, the head support device can be rotated and positioned at high speed.
- the leaf spring portion which is an elastic portion, is provided as a separate member independent of the head support arm, the load load on the head slider can be easily set to a predetermined value, Design freedom can be expanded.
- the disk device can be miniaturized.
- the phase at the resonance frequency of the head support device can be set to phase advance, it has no unstable characteristics such as oscillation at the resonance frequency, improves the position servo characteristics as the head support device, and stabilizes the seek operation. This can improve the head positioning accuracy.
- the head support device configured as described above for the magnetic disk device, it is possible to reduce the size, to have a high impact resistance and to have a high access speed, and to determine the head positioning accuracy. Can be realized.
- FIG 12 to 14 are diagrams for explaining the head support device according to the second embodiment of the present invention.
- the configuration of the head support device 120 according to the second embodiment is different from the configuration of the head support device 50 according to the first embodiment, although the positional force of the magnet 11 facing the voice coil 10 is different. Detailed description will be omitted because it is the same.
- FIG. 12 is a plan view showing the head support arm portion and the magnet.
- FIG. 13 is a developed side view showing the configuration of the head support device in which the Y—O—Y line in FIG. 12 is developed in a straight line.
- FIG. 12 shows only the head support arm portion
- FIG. 13 shows the head support device in FIG. 12, and also shows the elements.
- the magnet 11 constituting the VCM of the head support device 120 is fixed to the lower yoke 121, and the magnet 11 is disposed on the recording medium 4 side with respect to the voice coil 10.
- An upper yoke 122 is provided at a position facing the lower yoke 121.
- the position of the center of gravity 125 of the center of gravity setting portion in the voice coil section 124 including the coil holder 123 and the voice coil 10 is set to the head support arm 8 with respect to the center line 8d of the head support arm 8 about the axis 5a of the horizontal rotation shaft 5.
- the voice coil portion 124 may be symmetrical with respect to the center line 10a of the voice coil 10.
- the position of the center of gravity 125 of the center of gravity setting portion of the voice coil part 124 is necessarily centered on the axis 5a of the horizontal rotation shaft 5 and the center line 8d of the head support arm 8 with respect to the center of the head support arm 8. The position is clockwise from line 8d.
- the boundary between the north pole and the south pole of the magnet 11 is at the center line 10a in the rotational circumferential direction of the voice coil 10. It is the same as the magnet 11 of the first embodiment that it is magnetized as described above.
- the head support device 120 when a current is supplied to the voice coil 10, the head support device 120 is rotated by the VCM. At the same time, a magnetic force is applied between the voice coil 10 and the magnet 11 according to Fleming's law, and the head support device 120 depends on the direction of the current to the voice coil 10 and the direction of the magnetic flux of the magnet 11 facing the voice coil 10. And the direction of the vertical torque component acting on the voice coil 10 is determined. This is the same as in the first embodiment.
- FIG. 14 is a graph showing the relationship between the rotation angle of the head support device and the vertical torque due to VCM.
- the rotational torque component of the head support device 120 generated by VCM when a constant current is applied to the voice coil 10 is the same as in FIG. 6A in the first embodiment.
- the vertical torque component generated between magnet 11 and voice coil 10 at that time is the reverse of the vertical torque component in FIG. 6B of Embodiment 1 as shown in FIG.
- a curved line 141 indicated by a solid line indicates a vertical torque component in the loading direction
- a curve 142 indicated by a broken line indicates a vertical torque component in the unloading direction.
- the magnetic force generated between the voice coil 10 and the magnet 11 as in the first embodiment is used.
- the bending resonance mode of the voice coil section 124 is generated with the vertical rotation shaft 30 of the head support device 120 as a fulcrum.
- the position of the center of gravity 125 of the center of gravity setting portion of the voice coil unit 124 is in the direction of the axis 5a of the horizontal rotation shaft 5 with respect to a plane that includes the vertical rotation shaft 30 and is perpendicular to the horizontal rotation shaft 5. It is located on the recording medium 4 side and is a distance in the direction of the axis 5a of the horizontal rotation shaft 5 with respect to the vertical rotation shaft 30 that is the fulcrum of the stagnation when the voice coil section 124 is received by the magnetic force. And on the recording medium 4 side.
- the first plane perpendicular to the axial center 5a direction of the horizontal rotation shaft 5 including the center of gravity 125 of the center of gravity setting portion of the voice coil unit 124 constituted by the voice coil 10 and the coil holder 123 is vertical.
- the horizontal rotation axis 5 including the rotation axis 30 is configured to have a distance from the second plane perpendicular to the axis 5a direction of the horizontal rotation axis 5 in the direction of the axis 5a of the horizontal rotation axis 5.
- the center of gravity setting portion of the voice coil portion 124 in the plane perpendicular to the axis 5a of the horizontal rotation shaft 5 is The position of the center of gravity 125 changes slightly, and the force that tries to rotate the head support arm 126 acts. Therefore, the vertical component of the magnetic force generated between the voice coil 10 and the magnet 11 affects the frequency characteristics of the head support device 120 as in the first embodiment.
- the relationship between the position of the center 125 of the center of gravity of the voice coil unit 124 in the head support device 120 and the frequency characteristic of the head support device 120 depends on the center line 8d of the head support arm 8 or the horizontal rotation.
- the frequency characteristics of the head support device 120 in particular are the same as in the first embodiment.
- the phase characteristics can be phase advance. As a result, the stability of the position servo characteristics as the head support device 120 can be improved, and the head positioning accuracy can be improved.
- the center line 10a of the voice coil 10 in the circumferential direction of rotation is configured to have an angle ⁇ counterclockwise with respect to the center line 8d of the head support arm 8 about the axis 5a.
- the holding device in the same manner as in the first embodiment, on the side close to the center line 8d of the head support arm 8 in the coil holder, that is, on the side edge on the clockwise side around the axis 5a of the horizontal rotation shaft 5. Form a build-up part.
- the position force of the center of gravity 125 of the center of gravity setting portion of the voice coil section 124 is set to be at least a clockwise position with respect to the center line 8d of the head support arm 8 about the axis 5a of the horizontal rotation shaft 5.
- the same effects as those of the first embodiment are obtained, and by providing the head support device 120 in the disk device, it is possible to reduce the size of the disk device. can do. Furthermore, since the phase at the resonance frequency of the head support device 120 can be made phase advance, the head support device 120 does not have unstable characteristics such as oscillation at the resonance frequency, and realizes a stable position servo characteristic as the head support device 120, The head positioning accuracy can be greatly improved by stabilizing the seek operation.
- the head support device 120 configured as described above for a magnetic disk device, it is possible to achieve downsizing as in the first embodiment. In addition, impact resistance is great It is possible to realize a magnetic disk device that has a fast access speed and excellent head positioning accuracy.
- FIGS. 15 to 17 are diagrams for explaining the head support device according to the third embodiment of the present invention.
- the configuration of the head support device 150 according to the third embodiment has the same force as the configuration of the head support device 50 according to the first embodiment. Since there is, detailed explanation is omitted.
- the head support device 150 according to the third embodiment will be described with reference to the drawings because the main points differ from the head support device 50 according to the first embodiment.
- FIG. 15 is a plan view showing the head support arm portion and the magnet.
- FIG. 16 is a developed side view showing the configuration of the head support device in which the M—O—M line shown in FIG. 15 is developed in a straight line. However, FIG. 15 shows only the head support arm portion and the magnet, and FIG. 16 shows the head support device shown in FIG.
- the magnet 11 constituting the VCM of the head support device 150 is fixed to the upper yoke 12, and the magnet 11 is disposed on the opposite side of the recording medium 4 with respect to the voice coil 10.
- Speak. Positional force of the center of gravity 152 of the center of gravity setting portion in the voice coil section 151 comprising the coil holder 153 and the voice coil 10 Horizontal head axis 8 of the head support arm 8 with respect to the center line 8a about the axis 5a
- a built-up portion 153a is formed on one side edge of the coil holder 153 so that the center of gravity 152 is not far away from the center line 8d so that it is positioned in the clockwise direction with respect to the center line 8d.
- the voice coil portion 151 may be symmetrical with respect to the center line 10a of the voice coil 10. .
- the position force of the center of gravity 152 of the center of gravity setting portion in the voice coil section 151 inevitably, the center line 8d of the head support arm 8 with respect to the center line 8d of the head support arm 8 about the axis 5a of the horizontal rotation shaft 5 The position is more clockwise.
- Magnet 10 is magnetized such that the boundary between the N pole and S pole of magnet 11 is at the center line 10a in the circumferential direction of rotation. This is also the same as the magnet 11 in the first embodiment.
- the head support device 150 When a current is supplied to the voice coil 10, the head support device 150 is rotated by the VCM. At the same time, a magnetic force according to Fleming's law acts between the voice coil 10 and the magnet 11, and the head support device 150 depends on the direction of the current to the voice coil 10 and the direction of the magnetic flux of the magnet 11 facing the voice coil 10. And the direction of the vertical torque component acting on the voice coil 10 is determined. This is the same as in the first embodiment.
- the vertical component of the magnetic force during rotation in the loading or unloading direction is the opposite direction to that of the first embodiment. That is, when the head support device 150 is rotated to the inner peripheral side of the recording area of the recording medium 4, a vertical torque component acting between the voice coil 10 and the magnet 11 with respect to rotation in the loading direction in the first embodiment.
- the vertical torque component in the opposite direction acts between the voice coil 10 and the magnet 11.
- a vertical torque component in a direction opposite to the torque component acts between the voice coil 10 and the magnet 11.
- the magnetic force generated between the voice coil 10 and the magnet 11 as in the first embodiment is used.
- the bending resonance mode of the voice coil unit 151 is generated with the vertical rotation shaft 30 of the head support device 150 as a fulcrum.
- the position of the center of gravity 152 of the center of gravity setting portion of the voice coil unit 151 is in the direction of the axis 5a of the horizontal rotation shaft 5 with respect to a plane including the vertical rotation shaft 30 and perpendicular to the horizontal rotation shaft 5. Record It is on the side opposite to the medium 4 side, and in the direction of the axis 5a of the horizontal rotation shaft 5 with respect to the vertical rotation shaft 30 that is the fulcrum of stagnation when the voice coil section 151 is received by magnetic force. ⁇ It is on the opposite side of the recording medium 4 with a certain distance.
- the first plane perpendicular to the axis 5a direction of the horizontal rotation shaft 5 including the center of gravity 152 of the center of gravity setting portion of the voice coil unit 151 constituted by the voice coil 10 and the coil holder 153 is vertical.
- the horizontal rotation axis 5 including the rotation axis 30 is configured to have a distance from the second plane perpendicular to the axis 5a direction of the horizontal rotation axis 5 in the direction of the axis 5a of the horizontal rotation axis 5.
- the center of gravity setting portion of the voice coil portion 151 in the plane perpendicular to the axis 5a of the horizontal rotation shaft 5 is The position of the center of gravity 152 changes slightly, and a force to rotate the head support arm portion 156 acts. Therefore, the vertical component of the magnetic force generated between the voice coil 10 and the magnet 11 affects the frequency characteristics of the head support device 150 as in the first embodiment.
- the relationship between the position of the center 152 of the center of gravity of the voice coil 151 in the head support device 150 and the frequency characteristic of the head support device 150 depends on the center line 8d of the head support arm 8 or horizontally.
- the frequency characteristics of the head support device 150 are In particular, the phase characteristics can be made phase advance. As a result, the stability of the position servo characteristics of the head support device 150 can be improved, and the head positioning accuracy can be improved.
- FIG. 17 is a plan view of the head support arm portion for showing the position of the center of gravity of the center of gravity setting portion in another example of the voice coil unit.
- the center line 10a in the rotational circumferential direction of the voice coil 10 is configured to have an angle ⁇ in the counterclockwise direction with respect to the center line 8d of the head support arm 8 about the axis 5a.
- the side near the center line 8d of the head support arm 8 in the coil holder 171 that is, the clockwise side around the axis 5a of the horizontal rotation shaft 5
- a built-up portion 171a is formed on the side edge portion of the plate.
- the position of the center of gravity 173 of the center of gravity setting portion in the voice coil unit 172 is at least relative to the center line 8d of the head support arm 8 about the axis 5a of the horizontal rotation shaft 5.
- the same effect as in the first and second embodiments is obtained.
- the disk device is Can be reduced in size.
- the phase at the resonance frequency of the head support device 150 can be set to phase advance, the head support device 150 does not have unstable characteristics such as oscillation at the resonance frequency, and the head support device 150 achieves stable position servo characteristics.
- the seek operation can be stabilized and the head positioning accuracy can be greatly improved.
- the head support device 150 configured as described above in a magnetic disk device, it is possible to achieve downsizing as in the first and second embodiments. Furthermore, it is possible to realize a magnetic disk device having high impact resistance and high access speed, and excellent head positioning accuracy.
- 18 to 20 are diagrams for explaining the head support device according to the fourth embodiment of the present invention.
- the configuration of the head support device 180 according to the fourth embodiment is the positional force of the magnet 11 facing the voice coil 10.
- the force is different from the configuration of the head support device 150 according to the third embodiment. Since they are the same, detailed description is omitted.
- FIG. 18 is a plan view showing the head support arm portion and the magnet.
- FIG. 19 is a developed side view showing the configuration of the head support device in which the N—O—N line shown in FIG. 18 is developed in a straight line. However, FIG. 18 shows only the head support arm portion and the magnet, and FIG. 19 shows the head support device as shown in FIG.
- the magnet 11 constituting the VCM of the head support device 180 is fixed to the lower yoke 185, and the magnet 11 is disposed on the recording medium 4 side with respect to the voice coil 10. .
- An upper yoke 186 is provided at a position facing the lower yoke 185.
- Center of gravity of voice coil unit 182 consisting of voice coil 10 and coil holder 181
- the position of the center of gravity 183 of the fixed portion is a counterclockwise position with respect to the center line 8d of the head support arm 8 with respect to the center line 8d of the head support arm 8 around the axis 5a of the horizontal rotation shaft 5.
- a built-up portion 181a is formed on one side edge of the coil holder 181, and the center of gravity 183 of the center of gravity setting portion is not greatly separated from the center line 8d of the head support arm 8! .
- the built-up portion 181a is necessarily formed on one side edge of the coil holder 181.
- the voice coil portion 182 may be symmetrical with respect to the center line 10a of the voice coil 10.
- the position of the center of gravity 183 of the center of gravity setting portion of the voice coil unit 182 is necessarily centered on the axis 5a of the horizontal rotation shaft 5 with respect to the center line 8d of the head support arm 8, and the center line 8d of the head support arm 8 The position is more counterclockwise.
- the boundary between the north pole and the south pole of the magnet 11 is at the center line 10a in the rotational circumferential direction of the voice coil 10. It is magnetized like this. This is the same as in the first embodiment.
- the head support device 180 When the current is supplied to the voice coil 10, the head support device 180 is rotated. At the same time, a magnetic force according to Fleming's law acts between the voice coil 10 and the magnet 11, and the rotation of the head support device 180 depends on the direction of the current to the voice coil 10 and the direction of the magnetic flux of the magnet 11 facing the voice coil 10. The moving direction and the direction of the vertical torque component acting on the voice coil 10 are determined. This is the same as in the first embodiment.
- the vertical component of the magnetic force during rotation in the loading or unloading direction is the opposite direction to that of the first embodiment. That is, when the head support device 180 is rotated to the inner peripheral side of the recording area of the recording medium 4, the vertical torque component acting between the voice coil 10 and the magnet 11 with respect to the rotation in the loading direction in the first embodiment.
- the vertical torque component in the opposite direction acts between the voice coil 10 and the magnet 11.
- a current is supplied to the voice coil 10 so as to be rotated in the unloading direction, it similarly acts between the voice coil 10 and the magnet 11 with respect to the rotation in the loading direction in the first embodiment.
- a vertical torque component in a direction opposite to the vertical torque component acts between the voice coil 10 and the magnet 11.
- Head support device generated by VCM when a constant current is applied to voice coil 10 The rotational torque component of 150 is the same as that in FIG. 6A in the first embodiment. Further, the vertical torque component generated between the magnet 11 and the voice coil 10 at that time is the same as the vertical torque component in FIG. 14 of the second embodiment.
- the position of the center of gravity 183 of the center of gravity setting portion of the voice coil unit 182 is in the direction of the axis 5a of the horizontal rotation shaft 5 with respect to the plane including the vertical rotation shaft 30 and perpendicular to the horizontal rotation shaft 5. It is on the side opposite to the recording medium 4 and has a certain distance in the direction of the axis 5a of the horizontal rotation shaft 5 with respect to the vertical rotation shaft 30 that receives the magnetic force and serves as a stagnation fulcrum of the voice coil unit 182. Therefore, it is on the opposite side of the recording medium 4 side.
- the first plane perpendicular to the axis 5a direction of the horizontal rotation shaft 5 including the center of gravity 183 of the center of gravity setting portion of the voice coil unit 182 constituted by the voice coil 10 and the coil holder 181 is vertical.
- the horizontal rotation axis 5 including the rotation axis 30 is configured to have a distance from the second plane perpendicular to the axis 5a direction of the horizontal rotation axis 5 in the direction of the axis 5a of the horizontal rotation axis 5.
- the center of gravity setting portion of the voice coil portion 182 in the plane perpendicular to the axis 5a of the horizontal rotation shaft 5 The position of the center of gravity 183 changes slightly, and a force to rotate the head support arm 184 is applied. Therefore, the vertical component of the magnetic force generated between the voice coil 10 and the magnet 11 affects the frequency characteristics of the head support device 180 as in the first embodiment.
- a built-up portion 181a is formed on the side edge of the coil holder 181 near the center line 8d of the head support arm 8, and the position of the center of gravity 183 of the center of gravity setting portion in the voice coil unit 182 is horizontal.
- the rotation axis 5 is formed so as to be counterclockwise with respect to the center line 8d of the head support arm 8 around the axis 5a.
- the relationship between the center 183 of the center of gravity setting portion of the voice coil unit 182 in the head support device 180 and the frequency characteristics of the head support device 180 is the center line 8 of the head support arm 8. d, or by setting it to be positioned counterclockwise from the center line 8d of the head support arm 8 about the axis 5a of the horizontal rotation shaft 5, as in the first embodiment.
- the phase characteristic in the frequency characteristic of the support device 180 can be a phase advance.
- FIG. 20 is a plan view of the head support arm portion showing the center of gravity position of the center of gravity setting portion in another example of the voice coil portion.
- the center line 10a in the rotational circumferential direction of the voice coil 10 is at an angle ⁇ counterclockwise with respect to the center line 8d of the head support arm 8 about the axis 5a of the horizontal rotational axis 5.
- the side close to the center line 8d of the head support arm 8 in the coil holder 201 that is, the axis 5a of the horizontal rotation shaft 5 is the center.
- Overlaying portion 201a is formed on the side edge portion on the counterclockwise direction.
- the position force of the center of gravity 203 of the center of gravity setting portion of the voice coil unit 202 is set to be counterclockwise with respect to the center line 8d of the head support arm 8 about the axis 5a of the horizontal rotation shaft 5.
- the same effects as those of the first embodiment, the second embodiment, and the third embodiment are obtained, and the head support device 180 is provided in the disk device. Therefore, it is possible to reduce the size of the disk device. Furthermore, since the phase at the resonance frequency of the head support device can be set to phase advance, the head support device does not have unstable characteristics such as oscillation at the resonance frequency, and realizes stable position servo characteristics as a head support device, and seek operation. The head positioning accuracy can be greatly improved.
- the head support device configured as described above for the magnetic disk device, it is possible to achieve downsizing as in the first to third embodiments, and at the same time, impact resistance Therefore, it is possible to realize a magnetic disk device that has a large and fast access speed and excellent head positioning accuracy.
- the pair of pivots 26a and 26b are provided in the pivot bearing 26, and the pivots 26a and 26b are provided.
- the force described for the configuration in which the top of the head contacts the upper surface of the head support arm 8 It is not limited to.
- the vertical rotation shaft may be provided at a position perpendicular to the axial direction of the horizontal rotation shaft and the center line of the head support arm. Furthermore, the apexes of the pair of pivots forming the vertical rotation axis may be provided at positions symmetrical with respect to the center line of the head support arm. Further, the vertical rotation shaft may be provided at a position passing through the axis of the horizontal rotation shaft.
- the head support device can rotate in the direction perpendicular to the surface of the recording medium with the vertical rotation axis as a reference. Therefore, the rotation center can be set accurately with a simple configuration. For this reason, it is possible to perform the head positioning control more accurately.
- FIG. 21 is a side view showing another example for forming the vertical rotation shaft in the first to fourth embodiments of the present invention.
- a pair of pivots 21 la and 211b may be provided on the head support arm 211, and the apexes of these pivots 21 la and 21 lb may be in contact with the lower surface of the flange 212a of the bearing portion 212.
- the respective contacts Q 1 and Q 2 where the pivots 211a and 211b abut against the lower surface of the flange 212a of the bearing portion 212 are symmetrical with respect to the axis of the horizontal rotation shaft 5 (not shown).
- the vertical rotation axis passes through the axis of the horizontal rotation axis 5 and is perpendicular to the longitudinal center line of the head support arm 211.
- the midpoint of the line connecting the contact points Ql and Q2 can be configured so that it substantially coincides with the axis of the horizontal rotation shaft 5.
- the center of gravity position of the total mass of the members rotating around the vertical rotation axis is configured to coincide with the plane including the axis of the vertical rotation axis and the horizontal rotation axis. Even so.
- the head support arm portion does not rotate around the vertical rotation shaft even in response to an impact in the axial direction of the rotation shaft from the outside. As a result, a head support device excellent in impact resistance can be realized.
- the disk device of the present invention is a head support device having a recording medium rotated by a spindle motor, and a signal conversion element facing the recording medium and recording a signal on the recording medium or reproducing a signal from the recording medium.
- the head support device has the above-described configuration. Support device.
- the present invention enables a head support arm, in which a head slider mounted with a head is connected by a gimbal mechanism, to be rotatable about a horizontal rotation axis in a direction parallel to the surface of the recording medium.
- a leaf spring portion which is an elastic portion that can be rotated in a direction perpendicular to the surface of the recording medium with a line connecting the apexes of the pair of pivots as a vertical rotation axis, and that applies an urging force for generating a load is provided.
- the present invention also provides a voice coil and coil holder force so that the center line in the rotation direction of the voice coil has an angle ⁇ (see Fig. 2) with respect to the center line in the longitudinal direction of the head support arm.
- the voice coil portion is fixed to the head support arm, and has a configuration in which a magnet and a yoke are disposed so as to face the respective surfaces on both sides of the voice coil in the axial direction of the horizontal rotation shaft.
- the head support arm constituting the head support device can be formed of a material having high rigidity, and thus is resistant to a large external shock or the like.
- the impact property can be improved, the resonance frequency of the head support arm can be increased, and the head support device can be rotated and positioned at high speed.
- the leaf spring portion which is an elastic portion, is provided as a separate member independent of the head support arm, the load load on the head slider can be easily set to a predetermined value. Design freedom can be expanded.
- the disk device can be downsized, and the phase at the resonance frequency of the head support device can be made phase advance. Therefore, the head support device does not have unstable characteristics such as oscillation at the resonance frequency.
- the position servo characteristics as a device can be improved, the seek operation can be stabilized, and the head positioning accuracy can be improved.
- the head support device of the present invention downsizing is realized, and at the same time, the impact resistance is very high and the access speed is very high. It is possible to realize an excellent disk device with an improved degree.
- the present invention enables a head support arm, in which a head slider mounted with a head is connected by a gimbal mechanism, to rotate around a horizontal rotation axis in a direction parallel to the surface of the recording medium.
- a leaf spring portion which is an elastic portion that is capable of rotating in a direction perpendicular to the surface of the recording medium with a line connecting the vertices of a pair of pivots as a vertical rotation axis and that applies a biasing force for generating a load, is provided. Yes.
- the impact resistance is improved and the head support device can be rotated and positioned at a high speed. It is useful in the field of disk devices.
Landscapes
- Moving Of Heads (AREA)
- Supporting Of Heads In Record-Carrier Devices (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006800134527A CN101164114B (zh) | 2005-04-22 | 2006-04-20 | 头支承装置以及具备该装置的盘装置 |
| US11/910,489 US20090109576A1 (en) | 2005-04-22 | 2006-04-20 | Head support device and disk device with the same |
| JP2007514641A JP4055825B2 (ja) | 2005-04-22 | 2006-04-20 | ヘッド支持装置およびそれを備えたディスク装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005124631 | 2005-04-22 | ||
| JP2005-124631 | 2005-04-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006115160A1 true WO2006115160A1 (ja) | 2006-11-02 |
Family
ID=37214778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2006/308284 Ceased WO2006115160A1 (ja) | 2005-04-22 | 2006-04-20 | ヘッド支持装置およびそれを備えたディスク装置 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20090109576A1 (ja) |
| JP (1) | JP4055825B2 (ja) |
| CN (1) | CN101164114B (ja) |
| WO (1) | WO2006115160A1 (ja) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4942601B2 (ja) * | 2007-09-21 | 2012-05-30 | 三菱電機株式会社 | 駆動装置 |
| US8537500B2 (en) | 2010-12-29 | 2013-09-17 | HGST Netherlands B.V. | Magnetic disk device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001236747A (ja) * | 2000-02-21 | 2001-08-31 | Sony Corp | ディスク記憶装置 |
| JP3374846B2 (ja) * | 2001-02-13 | 2003-02-10 | 松下電器産業株式会社 | ヘッド支持装置 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5023733A (en) * | 1985-12-16 | 1991-06-11 | Seiko Epson Corporation | Head positioning control for a spindle motor disk drive |
| JPH0445350U (ja) * | 1990-08-08 | 1992-04-17 | ||
| US5343347A (en) * | 1992-05-01 | 1994-08-30 | Gilovich Paul A | Magnetic disk storage module with multiple sets of actuator arms for simultaneous read/write operations at different circumferential locations within the disk stack |
| US6826018B2 (en) * | 2001-03-06 | 2004-11-30 | Matsushita Electric Industrial Co., Ltd. | Disk drive with head supporting device |
| US7265945B2 (en) * | 2002-06-11 | 2007-09-04 | Matsushita Electric Industrial Co., Ltd. | Head drive device including head support mechanism having support arm rotatable relative to base arm via rotation support part, and disk apparatus including the head drive device |
| JP3966198B2 (ja) * | 2002-08-08 | 2007-08-29 | 松下電器産業株式会社 | ヘッド支持装置およびこれを用いたディスク装置 |
| US7855856B2 (en) * | 2004-09-22 | 2010-12-21 | Panasonic Corporation | Disk device employing a CSS system head supporting unit |
-
2006
- 2006-04-20 CN CN2006800134527A patent/CN101164114B/zh not_active Expired - Fee Related
- 2006-04-20 JP JP2007514641A patent/JP4055825B2/ja not_active Expired - Fee Related
- 2006-04-20 WO PCT/JP2006/308284 patent/WO2006115160A1/ja not_active Ceased
- 2006-04-20 US US11/910,489 patent/US20090109576A1/en not_active Abandoned
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001236747A (ja) * | 2000-02-21 | 2001-08-31 | Sony Corp | ディスク記憶装置 |
| JP3374846B2 (ja) * | 2001-02-13 | 2003-02-10 | 松下電器産業株式会社 | ヘッド支持装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2006115160A1 (ja) | 2008-12-18 |
| US20090109576A1 (en) | 2009-04-30 |
| CN101164114A (zh) | 2008-04-16 |
| JP4055825B2 (ja) | 2008-03-05 |
| CN101164114B (zh) | 2010-11-03 |
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