JP2000011553A - Magnetic head device and magnetic disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic head device in which a contact state between a magnetic head and a magnetic disk are kept always satisfactorily and a magnetic disk device provided with the magnetic head device. SOLUTION: A magnetic head device 40 having a magnetic head recording and reproducing information of a magnetic disk 31 sliding to a surface of a magnetic disk 31 is provided with supporting members 41, 42, 48 which can be moved in the vertical direction to the face of magnetic disk 31 and support the magnetic head 40, and energizing members 50, 51 energizing the supporting members 41, 42, 48 from both sides of the movement direction. Thereby, a contact state between the magnetic head and the magnetic disk can be kept always satisfactorily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head device having a magnetic head for recording and reproducing information such as data and programs on a magnetic disk, and a magnetic disk device provided with the magnetic head device.

[0002]

2. Description of the Related Art In a computer system, for example, a floppy disk device is used as a magnetic disk device. FIG. 6 is a sectional side view showing an example of a conventional floppy disk drive. This floppy disk device 10 has a spindle motor 12 for controlling the rotational drive of a floppy disk 11, which is a recording medium for recording information, and a disk diameter of a pair of magnetic heads for recording and reproducing information on both surfaces of the floppy disk 11. Magnetic head device 20 for controlling linear driving in
It is stored in the drive case 13.

In this magnetic head device 20, a carriage main body 23 having an upper carriage 21 and a lower carriage 22 arranged so as to sandwich both surfaces of a floppy disk 11 is engaged with a ball screw 24, and a direction indicated by an arrow a in FIG.
That is, it is movably supported in the radial direction of the disk. A slider 25 on which a magnetic head is mounted is mounted on one end of the upper carriage 21, and the other end of the upper carriage 21 is a leaf spring 2.
6 is fixed to the carriage main body 23. A slider 27 on which a magnetic head is mounted is mounted on one end of the lower carriage 22, and the other end of the lower carriage 22 is integrated with the carriage main body 23.

In such a configuration, when the cartridge 14 containing the floppy disk 11 is inserted through the opening 15 of the floppy disk device 10, the floppy disk 11 is chucked by the rotating shaft of the spindle motor 12, and the magnetic head The device 20 is sandwiched between the upper carriage 21 and the lower carriage 22. The slider 25 mounted on the upper carriage 21 is brought into contact with the upper surface of the floppy disk 11 by the elastic force of the leaf spring 26, and the slider 27 mounted on the lower carriage 22 is moved by the pressing force of the slider 25. Is contacted with the lower surface.

In this state, the spindle motor 12 is rotationally driven to rotate the floppy disk 11 at a constant angular velocity, and the ball screw 24 is rotationally driven to move the carriage body 23 of the magnetic head device 20 so that both surfaces of the floppy disk 11 are moved. Slider 2 sliding on each
Data and the like are recorded on the floppy disk 11 and the data and the like recorded on the floppy disk 11 are reproduced by the magnetic heads mounted on the floppy disks 5 and 27.

[0006]

In the above-described conventional magnetic head device 20, the slider 25 mounted on the upper carriage 21 contacts the upper surface of the floppy disk 11 by the elastic force of the leaf spring 26, and the lower carriage 22 The mounted slider 27 is in contact with the lower surface of the floppy disk 11 by the pressing force of the slider 25. Therefore,
There is a problem that the pressing forces of the sliders 25 and 27 tend to be unbalanced, the magnetic head hits the floppy disk 11 unevenly, and the electromagnetic conversion characteristics deteriorate.

Further, when vibration or impact is applied to the magnetic head device 20, the leaf spring 26 may be deformed in a direction separating the slider 25 from the upper surface of the floppy disk 11, thereby deteriorating the recording / reproducing accuracy of data and the like. There was a problem. On the other hand, it is also possible to use a suspension with a bend as used in a hard disk drive, but it is difficult to guarantee accuracy and dimensions, the gap position of the magnetic head tends to vary, and it is generally expensive. There was a problem.

In view of the above, the present invention provides a magnetic head device capable of always maintaining a good contact state between a magnetic head and a magnetic disk and a magnetic disk device provided with the magnetic head device. The purpose is.

[0009]

According to the present invention, there is provided a magnetic head device having a magnetic head for recording and reproducing information on the magnetic disk by sliding on a surface of the magnetic disk. This is achieved by providing a support member movable in a direction perpendicular to a plane and supporting the magnetic head, and an urging member for urging the support member from both sides in the moving direction.

Further, according to the present invention, there is provided a drive unit for driving a magnetic disk for recording information, and a magnetic disk which slides on a surface of the magnetic disk rotated by the drive unit. A magnetic head device having a magnetic head for recording / reproducing information of the magnetic head device, wherein the magnetic head device is movable in a direction perpendicular to a surface of the magnetic disk, And a biasing member that biases the support member from both sides in the moving direction.

According to the above configuration, since the magnetic head is urged by the urging member from both sides in the direction perpendicular to the surface of the magnetic disk, the contact of the magnetic head with the magnetic disk becomes uniform, and the electromagnetic conversion characteristics are improved. The magnetic head device can be satisfactorily maintained, the vibration resistance and the shock resistance of the magnetic head device can be improved, and the recording / reproducing accuracy can be improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention, and therefore, various technically preferable limitations are given. However, the scope of the present invention particularly limits the present invention in the following description. It is not limited to these forms unless otherwise stated.

FIGS. 1A and 1B are a cross-sectional side view and a cross-sectional plan view showing a configuration example of a floppy disk drive which is an embodiment of the magnetic disk drive of the present invention. The floppy disk device 30 includes a spindle motor 32 that controls the rotational drive of a floppy disk 31, which is a recording medium for recording information, and a pair of opposed magnetic heads that record and reproduce information on both surfaces of the floppy disk 31. A magnetic head device 40 for controlling linear drive in the disk radial direction is housed in a drive case 33.

The magnetic head device 40 has a carriage 43 having a flat upper suspension (supporting member) 41 and a flat lower suspension (supporting member) 42 arranged so as to sandwich both surfaces of the floppy disk 31.
Are supported by the main shaft 44 and the sub shaft 45 so as to be movable in the direction of arrow a in the drawing, that is, in the radial direction of the disk. A slider 46 on which a magnetic head is mounted is attached to one end of the upper suspension 41, and the lower suspension 4
A slider 47 on which a magnetic head is mounted is mounted on one end of the suspension 2, and the other ends of the suspensions 41 and 42 are fixed to both surfaces of a fixed block (support member) 48.

A fixed block 48 is mounted on a shaft 49 provided at one end of the carriage 43 in the direction indicated by the arrow b in the drawing.
That is, two compression coil springs (biasing members) that are movably passed in the direction perpendicular to the surface of the floppy disk 31 and that both surfaces of the fixed block 48 are passed through the shaft 49.
It is urged and supported by 50 and 51. Further, a voice coil 52 constituting a voice coil motor for moving the carriage 43 in the direction of arrow a in the figure is provided at the other end of the carriage 43.

FIG. 2 is a side view showing a detailed example of one end of the upper suspension 41 (lower suspension 42).
One end of the upper suspension 41 (lower suspension 42) has a P-plate 53 (54) and a gimbal 55 (5).
6), the slider 46 (47) is mounted in this order. The P-plate 53 (54) contains, for example, a 2MB magnetic circuit component. Gimbal 55 (56)
Has a slider mounting surface 55a (56a) formed at the center thereof as shown in the enlarged view of FIG. 3, so that the slider mounting surface 55a (56a) can rotate only around the X axis and the Y axis. Then, a C-shaped cutout 55b (56b) is etched around the slider mounting surface 55a (56a).
Are formed. Then, the slider mounting surface 55a (5
A pivot 55c (56c) is formed at the center of 6a), and the slider 46 on which the magnetic head 46a (47a) is mounted via the pivot 55c (56c).
(47) is attached.

In such a configuration, when the cartridge 34 containing the floppy disk 31 is inserted through the opening 35 of the floppy disk device 30, the floppy disk 31 is chucked by the rotating shaft of the spindle motor 32 and the magnetic head The device 40 is sandwiched between the upper suspension 41 and the lower suspension 42. Then, the sliders 46 and 47 mounted on the upper suspension 41 and the lower suspension 42 are brought into contact with the upper and lower surfaces of the floppy disk 31 by the load / unload bar 36.

In this state, the spindle motor 32 is rotationally driven to rotate the floppy disk 31 at a constant angular velocity, and a current is supplied from the outside to the voice coil 52 so that the carriage 43 is shown by a force generated by a magnetic field of a magnet (not shown). The data is moved in the direction of arrow a, and data and the like are recorded on the floppy disk 31 by the magnetic heads 46a and 47a mounted on the sliders 46 and 47 sliding on both surfaces of the floppy disk 31, and are recorded on the floppy disk 31. Play back the data etc.

When the floppy disk 31 is flat, the two compression coil springs 50 and 51 urge the fixed block 48 from both sides with equal pressure to support the sliders 46 and 47. The pressing force is balanced, and the floppy disk 3 of the magnetic heads 46a and 47a is
1 is uniform, and good electromagnetic conversion characteristics can be obtained. When the floppy disk 31 is undulating, as shown in FIG. 3A, when the floppy disk 31 is above the center line, the upper compression coil spring 50 is compressed. When the fixed block 48 is returned to the position of the center line and the floppy disk 31 is below the center line as shown in FIG. 3 (B), the lower compression coil spring 51 is compressed, so that it is restored. The force returns the fixed block 48 to the position of the center line.

Therefore, the pressing forces of the sliders 46 and 47 against the floppy disk 31 are balanced, and the magnetic heads 46a and 47a are evenly applied to the floppy disk 31, so that good electromagnetic conversion characteristics can be obtained. The undulation of the floppy disk 31 can also be suppressed. The contact between the sliders 46 and 47 and the floppy disk 31 until the fixed block 48 deviates from the position of the center line and returns to the pivot 55c.
(56c) and the follow-up portion 55b (56b), the magnetic heads 46a, 47a also hit the floppy disk 31 uniformly.

Even if vibration or impact is applied to the magnetic head device 40, the two compression coil springs 50 and 51 urge the fixed block 48 from both sides with equal pressure to support the sliders 46 and 47. Does not separate from the floppy disk 31 and the recording and reproducing accuracy of data and the like can be maintained well. Furthermore, each slider 4
Since 6, 47 are bonded to the upper suspension 41 and the lower suspension 42 which are not bent, the bonding accuracy can be easily obtained.
Also, the bonding jig can be simplified. And
Since the gap position accuracy of each of the magnetic heads 46a and 47a is easily obtained, head positioning, track alignment, and azimuth alignment with the carriage 43 are facilitated.

In the above-described embodiment, the magnetic head device and the magnetic disk device have a pair of magnetic heads 46a and 47a opposed to each other, but the magnetic head device and the magnetic disk device having one of the magnetic heads, or The present invention can be similarly applied to a magnetic head device and a magnetic disk device having a plurality of pairs of opposing magnetic heads.

FIG. 4 is a side view showing a main part of another embodiment of the magnetic head device of the present invention. The same components as those in FIG. The magnetic head device 60 includes an upper suspension (holding member) 61 formed of a leaf spring instead of the upper suspension 41 and the lower suspension 42, the fixed block 48, and the two compression coil springs 50 and 51. A different structure is that a lower suspension (holding member) 62 and a fixed block (fixed member) 63 having a surface inclined toward the floppy disk 31 side, that is, an upper and lower surface having a trapezoidal shape whose side surface is A <B are provided. Has become.

That is, by fixing the other ends of the suspensions 61 and 62 to the inclined surface of the fixed block 63 and fixing the fixed block 63 to the shaft 49, the suspensions 61 and 62 are bent inwardly. May be configured to use the restoring force. In the above-described embodiment, the magnetic head device and the magnetic disk device have a pair of magnetic heads 46a and 47a opposed to each other.
The present invention can be similarly applied to a magnetic head device and a magnetic disk device having any one of the magnetic heads, or a magnetic head device and a magnetic disk device having a plurality of pairs of magnetic heads facing each other.

FIG. 5 is a side view showing a main part of still another embodiment of the magnetic head device according to the present invention. The same components as those in FIG. The magnetic head device 70 is formed of a leaf spring instead of the upper suspension 41 and the lower suspension 42 of the magnetic head device 40 and the two compression coil springs 50 and 51. The upper suspension (holding member) 71 and the lower suspension, in which the thickness A of the sliders 46 and 47 and the like are arranged so as to be larger than the thickness B of the fixed block (fixed member) 48, respectively. The configuration is different in that a (holding member) 72 is provided.

That is, the other ends of the suspensions 71 and 72 are fixed to the parallel surfaces of the fixed block 48, respectively, and the fixed block 48 is fixed to the shaft 49, so that the suspensions 71 and 72 are bent outwardly. May be configured to use the restoring force. In the above-described embodiment, the magnetic head device and the magnetic disk device have a pair of magnetic heads 46a and 47a opposed to each other.
The present invention can be similarly applied to a magnetic head device and a magnetic disk device having a plurality of pairs of opposing magnetic heads. Further, in each of the above embodiments, the case where the present invention is applied to a floppy disk device has been described. However, the present invention can be similarly applied to other magnetic disk devices, for example, a hard disk device.

[0027]

As described above, according to the present invention, the state of contact between the magnetic head and the magnetic disk can always be kept good.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view and a cross-sectional plan view illustrating a configuration example of a floppy disk drive which is an embodiment of a magnetic disk drive according to the present invention.

FIG. 2 is a side view and an enlarged plan view showing a detailed example of one end of an upper suspension (lower suspension) of the magnetic head device of FIG. 1;

FIG. 3 is a side view showing an operation example of the magnetic head device of FIG. 1;

FIG. 4 is a side view showing a main part of another embodiment of the magnetic head device of the present invention.

FIG. 5 is a side view showing a main part of still another embodiment of the magnetic head device of the present invention.

FIG. 6 is a sectional side view showing an example of a conventional magnetic disk drive.

[Explanation of symbols]

30: floppy disk device, 31: floppy disk, 32: spindle motor, 33 ...
・ Drive case, 34 ・ ・ ・ Cartridge, 35 ・ ・
・ Opening, 36 ... Load / unload bar, 40,
60, 70 ... magnetic head device, 41, 61, 71
..Upper suspension, 42, 62, 72 ... lower suspension, 43 ... carriage, 44 ... main shaft, 45 ... sub shaft, 46, 47 ...
Slider, 46a, 47a ... magnetic head, 48, 6
3 ... fixed block, 49 ... shaft, 50, 51 ...
.Compression coil springs, 52 Voice coil

Claims (12)

[Claims] 1. A magnetic head device having a magnetic head for recording and reproducing information on the magnetic disk by sliding on a surface of the magnetic disk, wherein the magnetic head device is movable in a direction perpendicular to the surface of the magnetic disk, A magnetic head device comprising: a support member that supports a magnetic head; and an urging member that urges the support member from both sides in the moving direction. 2. The magnetic head device according to claim 1, wherein the support member is formed in a flat plate shape. 3. The magnetic head device according to claim 1, wherein the biasing member is a coil spring. 4. The magnetic head device according to claim 1, wherein the pair of magnetic heads are arranged to face each other. 5. A magnetic head device having a magnetic head that records and reproduces information on the magnetic disk by sliding on a surface of the magnetic disk, wherein: a fixing member having a surface inclined toward the magnetic disk; A holding member holding the head and having the other end fixed to the inclined surface of the fixing member. 6. The magnetic head device according to claim 5, wherein the holding member is formed of a leaf spring. 7. The magnetic head device according to claim 5, wherein the holding members holding the pair of magnetic heads are arranged to face each other. 8. A magnetic head device having a pair of magnetic heads for recording and reproducing information on the magnetic disk by sliding on both surfaces of the magnetic disk, respectively; a fixing member having a surface parallel to both surfaces of the magnetic disk; A pair of holding members each having one end holding the magnetic head and the other end fixed to a parallel surface of the fixing member, wherein the pair of holding members have a distance between their one ends between the other ends. A magnetic head device, wherein the magnetic head device is disposed so as to be longer than the distance. 9. The magnetic head according to claim 8, wherein the holding member is formed of a leaf spring. 10. A drive unit for rotating a magnetic disk for recording information, and a magnetic head for recording and reproducing information on the magnetic disk by sliding on a surface of the magnetic disk rotated by the drive unit. A magnetic disk device comprising: a magnetic head device, wherein the magnetic head device is movable in a direction perpendicular to a surface of the magnetic disk, and a support member that supports the magnetic head; And a biasing member for biasing both sides of the moving direction of the magnetic disk drive. 11. A drive unit for rotating a magnetic disk for recording information, and a magnetic head for recording and reproducing information on the magnetic disk by sliding on a surface of the magnetic disk rotated by the drive unit. A magnetic disk device comprising: a magnetic head device, the magnetic head device comprising: a fixed member having a surface inclined toward the magnetic disk; and one end holding the magnetic head and the other end being a fixed member. A magnetic disk drive comprising: a holding member fixed to an inclined surface. 12. A drive means for rotatingly driving a magnetic disk for recording information, and a pair of magnetic disks for recording and reproducing information on the magnetic disk by sliding on both surfaces of the magnetic disk rotated by the drive means. A magnetic disk device comprising: a magnetic head device having a head, wherein the magnetic head device comprises: a fixing member having a surface parallel to both surfaces of the magnetic disk; A pair of holding members fixed to a parallel surface of the fixing member, wherein the pair of holding members are arranged such that the distance between one end thereof is greater than the distance between the other ends thereof. A magnetic disk drive characterized by the above-mentioned.