JP2003070221A - Head actuator and magnetic recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head actuator and a magnet recording/reproducing device of thin and small-sized type when a magnetic head and an arm are rotated at a prescribed angle. SOLUTION: A motor 33 has a stator 43 with a shaft and a rotor 40 rotating relative to the stator 43. The rotor 40 is rotatably supported through a bearing relative to the shaft of the stator 43. The stator 43 has a driving coil 60 which is disposed with the shaft as a center. The rotor 40 has a rotor yoke 56 integrated with an arm 20, and a driving magnet 48 which is fixed at the rotor yoke 56 to face the coil 60 and of which the south pole and the north pole are alternately polarized with the shaft as the center. The rotor 40 rotates in the range of a prescribed angle relative to the stator 43 by means of a magnetic field generated by exciting the coil 60 and a field of the magnet 48.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head actuator for rotating an arm provided with a magnetic head for recording information on a disc-shaped recording medium and reproducing information on the disc-shaped recording medium within a predetermined angle range. The present invention relates to a magnetic recording / reproducing device.

[0002]

2. Description of the Related Art As a magnetic recording / reproducing apparatus, for example, a small hard disk drive (abbreviated as HDD) apparatus has been conventionally used as a built-in magnetic recording / reproducing apparatus of a laptop type or notebook type personal computer. .

Generally, in an HDD, positioning control of a magnetic head is executed by a servo system which roughly performs speed control and position control. This servo system
The magnetic head is positioned at the target position on the magnetic disk by driving and controlling a head actuator mechanism that supports the magnetic head and moves it in the radial direction of the magnetic disk.

FIG. 12 shows a configuration example of an arm and a voice coil motor of a conventional hard disk drive device. The arm 1000 has a magnetic head 1001. The arm 1000 can swing about the bearing center 1002 along the rotation direction by a predetermined angle, for example, 30 to 40 degrees. The arm 1000 has a voice coil motor 1010.
This voice coil motor 1010 includes a winding coil 101.
2 and a magnet 1014. Winding coil 10
12 is provided integrally with the arm 1000.
The magnet 1014 is fixed to the inner surface of the housing of the hard disk drive so as to face the winding coil 1012. Magnet 1014 is S pole 101
6 and the north pole 1018. This winding coil 101
By energizing 2 from the outside, the winding coil 1
Due to the interaction between the magnetic force of 012 and the magnetic force of the magnet 1014, the arm 1000 swings in a predetermined angle range along the rotation direction.

[0005]

When the voice coil motor 1010 having such a structure is adopted, there are the following problems. Since the winding coil 1012 and the magnet 1014 are provided so as to project in a direction opposite to the projecting direction of the arm 1000, the magnet 1014 and the winding coil 1012 occupy a large volume in the hard disk drive device. Will end up. It is therefore an object of the present invention to solve the above problems and provide a head actuator and a magnetic recording / reproducing apparatus that can be made smaller and thinner when rotating a magnetic head and an arm at a predetermined angle.

[0006]

According to a first aspect of the present invention, there is provided a magnetic head for recording a signal on a disk-shaped recording medium and reproducing the signal from the disk-shaped recording medium, and an arm for supporting the magnetic head. A head actuator having a motor for rotating the arm within a predetermined angle range,
The motor includes a stator having a shaft and a rotor rotating with respect to the stator, the rotor being rotatably supported by the shaft of the stator via a bearing, and the stator is The rotor includes a driving coil arranged around an axis, the rotor is integral with the arm, and the rotor yoke is fixed to the rotor yoke and faces the coil. And a magnet for driving in which N poles are alternately magnetized, and the rotor is within a range of the predetermined angle with respect to the stator by a magnetic field generated by energizing the coil and a magnetic field of the magnet. A head actuator, which is configured to rotate.

In the first aspect, the motor has a stator having a shaft and a rotor rotating with respect to the stator. The rotor is rotatably supported on the shaft of the stator via bearings. The stator has a driving coil arranged around the shaft. In contrast, the rotor is
It has a rotor yoke that is integral with the arm, and a driving magnet that is fixed to the rotor yoke and faces the coils of the stator. This drive magnet is
S poles and N poles are alternately magnetized about the axis. The rotor is rotated within a predetermined angle range with respect to the stator by the magnetic field generated by energizing the coil and the magnetic field of the magnet. As a result, the coil of the stator is arranged around the axis, and the magnet for driving the rotor is magnetized with the S pole and the N pole alternately around the axis. The size can be reduced as compared with the case where it is provided so as to project laterally from. Since the driving coil is provided on the stator side, power feeding to the coil is easier than when the coil is provided on the rotor side.

According to a second aspect of the present invention, in the head actuator according to the first aspect, the coil is a laminated coil or a winding coil. In claim 2, the coil of the stator is a laminated coil or a wound coil. When the coil is a laminated coil, the coil can be made thinner in the axial direction than the wound coil, so that the head actuator can be made thinner in the axial direction.

According to a third aspect of the present invention, in the head actuator according to the first aspect, the magnet is disposed on the one surface side of the coil and on the other surface side of the coil. And a second magnet portion that is formed. In claim 3, since the magnet has the first magnet portion and the second magnet portion, it is larger due to the magnetic field generated by the coil when energized and the magnetic field generated by the first magnet portion and the second magnet portion. The rotating torque can rotate the rotor with respect to the stator.

According to a fourth aspect of the present invention, a magnetic head for recording a signal on a disk-shaped recording medium and reproducing the signal from the disk-shaped recording medium, an arm for supporting the magnetic head, and an arm having a predetermined angle. A magnetic recording / reproducing apparatus having a head actuator having a motor for rotating in a range, wherein the motor has a stator having an axis and a rotor rotating with respect to the stator, the rotor being relative to the axis of the stator. Is rotatably supported via a bearing, the stator has a driving coil arranged around the shaft, and the rotor is fixed to the rotor yoke, which is integral with the arm, and the rotor yoke. And facing the coil, and has a driving magnet in which S poles and N poles are alternately magnetized about the axis, A magnetic recording / reproducing device having a head actuator, characterized in that the rotor is rotated within a range of the predetermined angle with respect to the stator by a magnetic field generated by energizing the coil and a magnetic field of the magnet. It is a device.

In the present invention, the motor has a stator having a shaft and a rotor rotating with respect to the stator. The rotor is rotatably supported on the shaft of the stator via bearings. The stator has a driving coil arranged around the shaft. In contrast, the rotor is
It has a rotor yoke that is integral with the arm, and a driving magnet that is fixed to the rotor yoke and faces the coils of the stator. This drive magnet is
S poles and N poles are alternately magnetized about the axis. The rotor is rotated within a predetermined angle range with respect to the stator by the magnetic field generated by energizing the coil and the magnetic field of the magnet. As a result, the coil of the stator is arranged around the axis, and the magnet for driving the rotor is magnetized with the S pole and the N pole alternately around the axis. The size can be reduced as compared with the case where it is provided so as to project laterally from. Since the driving coil is provided on the stator side, power feeding to the coil is easier than when the coil is provided on the rotor side.

According to a fifth aspect of the present invention, in a magnetic recording / reproducing apparatus having the head actuator according to the fourth aspect,
The coil is a laminated coil or a wound coil. In claim 5, the coil of the stator is a laminated coil or a wound coil. When the coil is a laminated coil, the coil can be made thinner in the axial direction than the wound coil, so that the head actuator can be made thinner in the axial direction.

According to a sixth aspect of the present invention, there is provided a magnetic recording / reproducing apparatus having the head actuator according to the fourth aspect,
The magnet has a first magnet portion arranged on one surface side of the coil and a second magnet portion arranged on the other surface side of the coil. In the present invention, since the magnet has the first magnet portion and the second magnet portion, it is larger due to the magnetic field generated by the coil when energized and the magnetic field generated by the first magnet portion and the second magnet portion. The rotating torque can rotate the rotor with respect to the stator.

According to a seventh aspect of the present invention, in a magnetic recording / reproducing apparatus having the head actuator according to the fourth aspect,
The stator has a stator yoke, and the stator yoke is a part of the housing of the magnetic recording / reproducing apparatus. Claim 7
Since the stator yoke of the stator is part of the housing of the magnetic recording / reproducing apparatus, the number of parts can be reduced and the magnetic recording / reproducing apparatus can be miniaturized.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiment described below is a preferred specific example of the present invention,
Although various technically preferable limitations are given, the scope of the present invention is not limited to these forms unless otherwise specified in the description below.

FIG. 1 is a plan view of a hard disk drive device which is an example of a magnetic recording / reproducing device of the present invention, FIG. 2 is an exploded perspective view of the hard disk drive device 1 of FIG. 1, and FIG. 3 is a hard disk drive device. It is a perspective view which decomposed 1 further. The hard disk drive device 1 has a function of magnetically recording information on the disk-shaped recording medium D or magnetically reproducing information already recorded on the disk-shaped recording medium D. The disk-shaped recording medium D is also called a hard disk.
The hard disk drive device 1 is used by being mounted in a card slot of a so-called notebook personal computer, which is an example of electronic equipment, and is a very small and thin device.

As shown in FIGS. 2 and 3, the hard disk drive device 1 has a housing 2, a disk-shaped recording medium D, and a head actuator 30. The housing 2 has a first member 10 and a second member 12, and the head actuator 30 and the disk-shaped recording medium D described above are housed in the internal space formed by the first member 10 and the second member 12. Has been done. The first member 10 and the second member 12 are made of a magnetically permeable material such as a silicon steel plate or an iron plate. On the other hand, the disc-shaped recording medium D is continuously rotated by a motor 900 built in the housing 2 as shown in FIG.

The head actuator 30 is shown in FIGS.
It has an arm 20 and a magnetic head 24 as shown in FIG. The arm 20 has a suspension 20A, and the magnetic head 2 is attached to the tip of the suspension 20A.
4 is fixed. FIG. 5 shows a head actuator 30.
FIG. 6 is a plan view showing the head actuator 30.
FIG.

As shown in FIGS. 5 and 6, the head actuator 30 includes a motor 33, an arm 20, and a magnetic head 24.
have. As the magnetic head 24, for example, a GMR (Giant Magnetoresistive Effect Element) or the like can be adopted. The magnetic head 24 is supported by the suspension 20A. As shown in FIG. 5, the other end 20D of the arm 20 is a substantially circular portion and is the center of rotation. The arm 20 can swing about the rotation center CL in the R direction in FIG. 5 at a predetermined angle, for example, an angle within a range of 30 degrees or 40 degrees. The swing angle (predetermined angle) of 20 is 35 degrees.

The motor 33 is a cylindrical, compact and thin motor which is coaxially arranged with respect to the other end 20D of the arm 20 about the rotation center CL. By the operation of the motor 33, the arm 20 can swing along the R direction by a predetermined angle. When the motor 33 is operated, the magnetic head 24
However, by positioning with respect to an arbitrary track of the rotating disk-shaped recording medium D of FIG. 1, information is magnetically recorded on the disk-shaped recording medium D or information already recorded is magnetically reproduced. can do.

The motor 33 has the structure shown in FIGS. 6 and 7. FIG. 7 shows an example of a sectional structure taken along line AA of FIG. The motor 33 shown in FIGS. 6 and 7 has a rotor 40 and a stator 43. The rotor 40 is the stator 43
On the other hand, it is possible to swing about a shaft 46 through a bearing 44 by a predetermined angle. The stator 43 has the second member 12 of the housing, the driving coil 60, and the shaft 46. The coil 60 is fixed inside the second member 12 of the housing by, for example, bonding. The shaft 46 is fixed to the second member 12 with screws 50. The coil 60 is, for example, a laminated coil. Second member 12
Is a magnetically permeable material, such as an iron plate or a silicon steel plate. The stator yoke of the stator 43 is a part of the second member 12.

An inner ring 44A of the bearing 44 is fixed to the shaft 46 by, for example, press fitting or adhesion. Two sets of bearings 44 are provided for the shaft 46. The shaft 46 is also called a fixed shaft, and a spring (not shown) for applying a preload is interposed between the two sets of bearings 44, 44. This spring may be a metal coil spring, a leaf spring or a resin spring.

The rotor 40 has a flange member 54, a rotor yoke 56, and a driving magnet 48. The outer ring 44B of the bearing 44 is provided on the inner peripheral surface of the flange member 54.
Is fixed. The other end 20D of each arm is sandwiched between the flange 55 of the flange member 54 and the rotor yoke 56. The rotor yoke 56 is made of a magnetically permeable material, such as silicon steel plate or permalloy. The flange 55 of the flange member 54 is made of brass, aluminum or the like if it is a metal, and is made of PB if it is a resin.
It is made of T (polybutylene terephthalate) or the like.

The inner ring 44A of the bearing 44 of FIG. 7 is fixed to the shaft 46. The outer ring 44B of the bearing 44 is fixed to the inner surface of the sleeve 54A of the flange member 54 by press fitting or adhesion. The other end 20D of the arm, the magnet 48, and the rotor yoke 56 are attached to the outer peripheral surface of the sleeve 54A by press fitting or bonding. The other end 20D of each arm 20 is sandwiched and fixed between the flange 55 and the rotor yoke 56.

As shown in FIG. 6, the magnetic head 24 and the main substrate 500 are electrically connected by an input / output connecting portion 66 of the magnetic head. The input / output connecting portion 66 is
It is provided in the middle of the arm 20.

As shown in FIG. 7, the laminated coil 60 on the side of the stator 43 faces the magnet 48 on the side of the rotor 40 with a predetermined gap. The ring-shaped laminated coil 60 shown in FIG. 7 is attached to the inner surface of the second member 12 of the housing by adhesion or the like, and the laminated coil 60 is electrically connected to the energization control unit 100. There is.

8 and 9 show an example of the wiring pattern shape of the laminate coil 60 and an example of the magnetizing pattern of the magnet 48. The laminated coil 60 is a ring-shaped thin plate-shaped laminated coil, and the conductor material of the coil portion is electrolytic copper, and is made of epoxy resin, glass cloth, or the like as an auxiliary constituent material. The coil pattern (wiring pattern) of the laminate coil 60 may be formed in one layer or may be formed in a plurality of layers. When the coil pattern is formed in a plurality of layers, the coil patterns are electrically connected in series. This laminated coil 60
Is a coil that is completely different from the conventional wound coil made by winding a wire rod, and forms a coil pattern by a photographic method. Therefore, by using the laminated coil 60,
A relatively complicated concave wiring pattern 80 as shown in FIG. 8 can be obtained as compared with the winding coil, and the thickness in the direction of the rotation center CL can be reduced.

The laminate coil 60 is a circular member having a center of rotation CL as its center, and a round hole 70 is formed in the center. The laminating coil 60 is a ring-shaped or donut-shaped member for this purpose, and the laminating coil 60 has two regions PA1 and PA2 at 180 ° intervals about the rotation center CL.

FIG. 8 shows an example of magnetization patterns of the S-pole and N-pole of the laminate coil 60 and the magnet. The areas PA1 and PA2 are areas separated by the magnetic neutral line NL. . The area PA1 corresponds to the range of the S pole of the magnet 48 shown in FIG.
Corresponds to the area of the N pole of the magnet 48. The neutral line NL is a boundary line that separates the S pole and the N pole of the magnet 48. The laminate coil 60 has a disc shape, and a connecting portion 66 is formed so as to project. Connection part 66
The electrode 66A is electrically connected to the energization controller 100 via the flexible printed wiring board 101.

The laminate coil 60 has a first wiring pattern 110 and a second wiring pattern 120. First
The wiring pattern 110 and the second wiring pattern 120 are electrically connected in series. The first wiring pattern 110 is
The first wiring pattern 110 is formed at a position corresponding to the area PA2, and is formed in a fan-shaped range surrounded by the lines L1 and L2. Similarly, the second wiring pattern 120 is formed corresponding to the area PA1, and is formed in a fan shape in the range of another line L1 and line L2.

FIG. 10A is an enlarged view of a part of the second wiring pattern 120 of FIG. 8, and FIG. 10B is FIG.
The first wiring pattern 110 is shown in an enlarged manner. Figure 8
The first wiring pattern 110 and the second wiring pattern 12 shown in FIG.
0 has a similar shape. The first wiring pattern 110 shown in FIG. 10B has a plurality of drive wiring pattern portions 130 and a plurality of connection wiring pattern portions 140. Similarly, the second wiring pattern 120 of FIG.
Also has a plurality of drive wiring pattern portions 130 and a plurality of connection wiring pattern portions 140.

The drive wiring pattern portion 130 of FIG. 8 has a plurality of wirings 150. For example, in the example of FIG. 10, two wirings 150 are connected in parallel. The drive wiring pattern portion 130 configured by the plurality of wirings 150 is electrically connected in series to the adjacent drive wiring pattern portion 130 through the connection wiring pattern portion 140. The first wiring pattern 110 and the second wiring pattern 120 are connected in series as a whole, and one end portion of the first wiring pattern 110 and one end portion of the second wiring pattern 120 are electrically connected to the electrode 66A of the connection portion 66, respectively. It is connected to the. As a result, an energization current is supplied from the energization control unit 100 of FIG. 8 through the flexible printed wiring board 101, and this energization current is applied to the first wiring pattern 110 and the second wiring pattern 120 connected in series. It One electrode 66A of FIG. 8 is connected to the portion 111 of the first wiring pattern 110. The portion 112 of the first wiring pattern 110 is connected to the portion 113 of the second wiring pattern 120. The portion 114 of the second wiring pattern 120 is connected to the other electrode 66A. As a result, the first wiring pattern 110 and the second wiring pattern 1
20 are connected in series.

Therefore, in FIG. 10, when the current i flows through the drive wiring pattern portion 130 of the first wiring pattern 110, the drive wiring pattern portion 1 of the second wiring pattern 120 is formed.
A current i in the reverse direction flows through 30. When the current i1 flows through the drive wiring pattern portion 130 of the first wiring pattern 110, the reverse current i1 flows through the drive wiring pattern portion 130 of the second wiring pattern 120 of FIG. As described above, by supplying currents in opposite directions to the first wiring pattern 110 and the second wiring pattern 120 in FIG. 8, a large rotational torque in the same direction can be obtained. By passing a current i through the drive wiring pattern portion 130 of the first wiring pattern 110 and a current i through the drive wiring pattern portion 130 of the second wiring pattern 120, the drive wiring pattern portion 130 of the first wiring pattern 110 and the N pole are connected. Due to the magnetic interaction between the rotors, the rotor generates a rotating torque in the R2 direction in FIG. At the same time, due to the magnetic interaction between the drive wiring pattern portion 130 of the second wiring pattern 120 and the S pole, the rotor generates a rotating torque in the R2 direction.

On the contrary, the current i1 flows through the drive wiring pattern portion 130 of the first wiring pattern 110 and the second wiring pattern 12
When the current i1 also flows through the drive wiring pattern portion 130 of 0, the drive wiring pattern portion 13 of the first wiring pattern 110
Due to the magnetic interaction between the 0 and north poles, the rotor is
The rotational torque is generated in the R direction, and at the same time, the rotor also generates the rotational torque in the R1 direction, which is the same direction between the drive wiring pattern portion 130 of the second wiring pattern 120 and the S pole.
This allows the two first
A large rotational torque can be generated by combining the forces generated by the wiring pattern 110 and the second wiring pattern 120. First wiring pattern 110 and second wiring pattern 120
The center position formed by arranging and the center position of the arrangement of the S pole and the N pole of the magnet 48 coincide with the rotation center CL of the arm rotated within a predetermined angle range.

The movable range θ shown in FIG. 8 indicates the movable range of the arm 20 and is, for example, 35 degrees. The movable range θ is an angle formed by the line L1 and the line L2, and the movable range θ is a considerably smaller angle than the angles of the regions PA1 and PA2. Rotor 40 shown in FIG.
8 restricts the movable range θ, which is the swing angle shown in FIG. 8, with respect to the stator 43 to 35 degrees only when the formation angle shown by the first wiring pattern 110 and the second wiring pattern 120 shown in FIG. Good. Further, it is possible to mechanically regulate the movable range θ by a stopper, a damper or the like.

As described above, the first wiring pattern 110 in FIG. 8 overlaps so as to face the N pole, and the second wiring pattern 120 overlaps so as to face the S pole. . Energization control unit 100 of FIG.
However, the first wiring pattern 110 and the second wiring pattern 120
On the other hand, by switching the energizing direction as indicated by the current i or the current i1 as shown in FIG. 10, the rotor including the laminate coil 60 oscillates within a movable range of, for example, 35 degrees with respect to the stator including the magnet. be able to. The movable range θ may be 30 degrees instead of 35 degrees.

In the embodiment of the invention described above, the stator 43 has the coil 60 centered on the shaft 46, as shown in FIGS. This driving coil 60 has a shaft 46
It is being fixed to the 2nd member 12 centering on. On the other hand, the rotor has a magnet 48 for driving. The driving magnet 48 has S-poles and N-poles alternately magnetized about the shaft 46.

As shown in FIG. 7, when the drive coil 60 is energized by the energization controller 100 in a predetermined energizing pattern, the coil 60 generates a magnetic field. The magnetic field generated by the coil 60 and the magnetic field generated by the driving magnet 48 cause the rotor 40 to swing and rotate with respect to the stator 43 in the R direction shown in FIG. Since each arm 20 is integrated with the rotor 40, the swing angle of the rotor 40 and the arm 20 can be swung within a movable range θ (35 degrees as an example) shown in FIG. 8, for example. In order to accurately regulate the movable range θ that is the predetermined angular range, the swing angle of the arm 20 can be reliably set to the movable range θ by providing a mechanical stopper, for example. Arm 2
In order to swing 0 and the rotor 40 in a movable range θ shown in FIG. 8 which is a range of a predetermined angle, for the coil 60,
For example, it can be performed by switching the energization direction as shown by the direction of the current i or the current i1 as shown in FIG.

Next, another embodiment of the present invention will be described with reference to FIG. The hard disk drive device 1 of the embodiment of FIG. 11 has a first member 10 and a second member 12 of a housing 2, and a head actuator 330 is provided in the housing 2. The head actuator 330 has a rotor 340 and a stator 343. The rotor 340 and the stator 343 are connected to the motor 3
33 is composed.

The stator 343 has a stator yoke which is a part of the second member 12, a shaft 346, a coil 360, a sleeve 399 and the like. The shaft 346 is vertically fixed to the inner surface side of the second member 12 by a screw 50. On the other hand, the rotor 340 has a holder 380, a rotor yoke 356, the other end portion 20D of the arm, a first magnet portion 348A and a second magnet portion 348B. First magnet portion 348A and second magnet portion 348B
Constitute a driving magnet 348. As the coil 360 of the stator 343, for example, a laminated coil can be used. As this laminated coil, the same one as in the above-described embodiments can be adopted. The coil 360 is electrically connected to the energization control unit 100 via the connector 361 and the flexible wiring board 362.

The other end portion 20D of the arm is fixed to the outer peripheral portion of the holder 380 by using a sleeve 20J and a member 20K for pressing. Two rotor yokes 356, a first magnet portion 348A, and a second magnet portion 348B are housed in the holder 380. The upper rotor yoke 356 is provided in close contact with the first magnet portion 348A. The first magnet portion 348A includes the coil 36.
They are facing each other on the one surface 360S side of 0 with a space.
The lower rotor yoke 356 is fixed to the inner bottom surface of the holder 380. The rotor yoke 356 and the second magnet portion 348B are arranged in close contact with each other. The second magnet portion 348B faces the other surface 360T side of the coil 360 at a distance.

Two bearings 44, 44 are arranged between the holder 380 of the rotor 340 and the shaft 346 of the stator 343. The inner ring 44A of the bearings 44, 44 is the shaft 3
It is fixed to the outer peripheral surface of 46 by press fitting or adhesion.
The outer ring 44B of the bearing 44 is fixed to the inner peripheral surface of the holder 380 by press fitting or adhesion. Bearing 4
A member 44C for applying a preload is interposed between the Nos. 4 and 44.

Also in the embodiment of FIG. 11, the magnetic field generated by the coil 360, the first magnet portion 348A, and the second magnet are switched by switching the direction of the current flow to the wiring pattern of the coil 360 on the stator 343 side. Due to the interaction with the magnetic field generated by the portion 348B, the rotor 340 can swing about the shaft 346 by a predetermined angle. That is, since the rotor 340 and the arm 20D are integrated, the arm 20D can swing in a predetermined angle, that is, in a movable range, for example, a range of 35 degrees. In the embodiment of FIG. 7 described above, the second housing
Since the member 12 constitutes a part of the stator yoke of the stator, it is possible to reduce the number of parts and the size of the hard disk drive device.

As described above, since the head actuator and the magnetic recording / reproducing apparatus having the head actuator according to the embodiment of the present invention use the laminated coil (also called a ramie coil), the motor 30 can be made thinner in the axial direction. And miniaturization can be achieved. Further, by using the laminated coil, it is possible to reduce the cost and improve the reliability, as compared with the case of using the wound coil configured by winding the wire. Then, for example, as shown in FIG. 8 and FIG.
The first drive wiring pattern portion 110 and the second drive wiring pattern portion 120 of the wiring pattern 80 of the laminate coil 60 are formed so that the rotational torque acts on the N pole and the S pole of the magnet 48 in the same direction when the current flows. ing. Therefore, a rotational torque as large as the number of poles of the magnet, that is, the number of the first drive wiring pattern portions 110 and the second drive wiring pattern portions 120 of the laminate coil 60 can be obtained. When the current i flows, the rotor rotates around the central axis CL in one direction in the movable range θ, and when the current i1 flows, the rotor rotates around the central axis CL in the movable range θ. The structure of the motor can be made thinner and smaller, and becomes simpler. The wiring pattern 80 of the laminated coil does not have to harden a wire material to form a wound coil as in the conventional case, and thus does not require a step of solidifying with a resin as in the conventional case, which leads to cost reduction and electrical reliability. Can be raised.

The present invention is not limited to the above embodiment. In the above-described embodiment, a hard disk drive device is taken as an example of the magnetic recording / reproducing device. However, not limited to this, application to a device for controlling a certain angle range is conceivable. In the embodiment of the present invention, a so-called laminated coil is used as the coil,
Not limited to this, it is of course possible to use a wound coil formed by winding a wire on a substrate manually or by a machine.

[0046]

As described above, according to the present invention,
When rotating the magnetic head and the arm at a predetermined angle, downsizing and thinning can be achieved.

[Brief description of drawings]

FIG. 1 is a plan view showing a hard disk drive device which is a preferred embodiment of a magnetic recording / reproducing apparatus having a head actuator of the present invention.

FIG. 2 is an exploded perspective view of the hard disk drive device of FIG.

FIG. 3 is a further exploded perspective view of the hard disk drive device.

FIG. 4 is a diagram showing an example of a sectional structure of a hard disk drive device.

FIG. 5 is a plan view of a head actuator of a hard disk drive device.

6 is an exploded perspective view of the head actuator of FIG.

FIG. 7 is a diagram showing an example of a sectional structure taken along line AA of the head actuator of FIG.

FIG. 8 is a plan view showing an example of a wiring pattern of a laminated coil and a magnet.

9 is a perspective view of the laminated coil and magnet of FIG.

FIG. 10 is a diagram showing a shape example of a first wiring pattern and a second wiring pattern.

FIG. 11 is a sectional view showing another embodiment of the present invention.

FIG. 12 is a diagram showing a voice coil motor and the like of a conventional hard disk drive device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hard disk drive device (magnetic recording / reproducing device), 20 ... Arm, 24 ... Magnetic head, 30
... Head actuator, 33 ... Motor, 40
... Rotor, 43 ... Stator, 48 ... Magnet, 56 ... Rotor yoke, 60 ... Coil, 8
0 ... Wiring pattern, D ... Disc-shaped recording medium,

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H02K 41/03 H02K 41/03 AF terms (reference) 5D068 AA01 BB01 CC13 EE21 GG25 5H603 AA09 BB01 BB09 BB14 CA01 CA05 CB01 CB23 CC01 EE08 EE10 FA02 5H622 CA02 CA12 CB01 PP16 QA02 5H633 BB03 BB15 BB17 GG02 GG08 GG17 HH05 HH08 JA08 5H641 BB06 GG02 GG07 HH03 HH12 JA03 JA10 JA15

Claims (7)

[Claims] 1. A magnetic head for recording a signal on a disk-shaped recording medium and reproducing the signal of the disk-shaped recording medium, an arm for supporting the magnetic head, and a motor for rotating the arm within a predetermined angle range. The motor includes a stator having a shaft, and a rotor rotating with respect to the stator, the rotor being rotatably supported by the shaft of the stator via a bearing. Wherein the stator has a coil for driving arranged around the shaft, the rotor is fixed to the rotor yoke, which is integral with the arm, and faces the coil. A magnetic field that has a driving magnet in which S poles and N poles are alternately magnetized about the axis, and is generated by energizing the coil. Head actuator, characterized in that the magnetic field of the magnet, the rotor is configured to rotate relative to the stator. 2. The head actuator according to claim 1, wherein the coil is a laminated coil or a wound coil. 3. The head according to claim 1, wherein the magnet has a first magnet portion arranged on one surface side of the coil and a second magnet portion arranged on the other surface side of the coil. Actuator. 4. A magnetic head for recording a signal on a disk-shaped recording medium and reproducing the signal of the disk-shaped recording medium, an arm for supporting the magnetic head, and a motor for rotating the arm within a predetermined angle range. A magnetic recording / reproducing apparatus having a head actuator having: a motor having a stator having a shaft and a rotor rotating with respect to the stator, wherein the rotor has a bearing for the shaft of the stator. The rotor is rotatably supported, the stator has a driving coil arranged around the shaft, the rotor is a rotor yoke that is integral with the arm, and the rotor yoke is fixed to the rotor yoke. Facing each other, and having a driving magnet in which S poles and N poles are alternately magnetized about the axis, and is connected to the coil. The magnetic field and the magnetic field of the magnet generated by magnetic recording and reproducing apparatus having a head actuator, wherein the rotor is configured to be rotated relative to the stator. 5. The magnetic recording / reproducing apparatus having a head actuator according to claim 4, wherein the coil is a laminate coil or a winding coil. 6. The head according to claim 4, wherein the magnet has a first magnet portion arranged on one surface side of the coil and a second magnet portion arranged on the other surface side of the coil. A magnetic recording / reproducing apparatus having an actuator. 7. The stator has a stator yoke,
The magnetic recording / reproducing apparatus having a head actuator according to claim 4, wherein the stator yoke is a part of a housing of the magnetic recording / reproducing apparatus.