JP3556436B2 - Magnetic head device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a magnetic head device mounted on a magneto-optical disk device or the like, and in particular, by fixing a head body to an appropriate position on a flexure, good roll rigidity and pitch rigidity over the entire area of the head body. The present invention relates to a magnetic head device that can be obtained.
[0002]
[Prior art]
FIG. 8 is a partial perspective view showing the structure of a conventional magnetic head device provided in a magneto-optical disk device.
The magnetic head device includes a head body 30, a flexure 33 for fixing and supporting the head body 30, and a support member 40 for supporting the flexure 33.
As shown in FIG. 8, the head body 30 includes a slider 31 and a core assembly 32. The left side of the slider 31 in the drawing is the leading (A) side, and the right side of the slider 31 is the trailing (B) side. ing. The core assembly 32 is held at the trailing (b) side end of the slider 31. The lower surface of the slider 31 is the surface facing the recording medium, and the upper surface is the support side supported by the support member 40.
[0003]
The core assembly 32 includes a core made of a magnetic material and a coil. The lower surface of the core assembly 32 is flush with the lower surface of the slider 31.
The flexure 33 is formed by a thin leaf spring. As shown in FIG. 8, a positioning hole 35 is formed in the fixing portion 34 of the flexure 33. A notch 36 is formed in the flexure 33, and a portion separated by the notch 36 serves as a head support portion (tongue piece) 37. As shown in the figure, the head main body 30 is fixed below the head support portion 37 with an adhesive or the like.
[0004]
The support member 40 includes a load beam 41 and an adapter 43.
The load beam 41 is formed of a leaf spring material. As shown in FIG. 8, bent portions 41a, 41a are formed on both sides of the load beam 41, and the rigidity of this portion is increased. Further, the load beam 41 is formed with a leaf spring functional portion (not shown) having an elastic force from the end of the bent portions 41a, 41a toward the rear end of the load beam 41. The load beam 41 has a pair of positioning holes 42 formed therein.
The adapter 43 is formed in a concave shape, and the rising pieces 44, 45 are formed with positioning holes 44a, 45a. The positioning holes 44a, 45a are aligned with the positioning holes 42, 42 formed in the load beam 41, and the adapter 43 is fixedly supported by the load beam 41.
[0005]
The bottom surface of the adapter 43 has a step structure, and a spherical pivot (contact portion) 46 protruding downward in the figure is formed on the bottom surface which is raised one step. A positioning hole 48 is formed in the bottom surface which is lower by one step. The positioning hole 48 and the positioning hole 35 formed in the flexure 33 are aligned, and the flexure 33 is fixedly supported by the adapter 43. At this time, the apex of the pivot 46 provided on the adapter 43 abuts on the upper surface of the head main body 30 via the flexure 33, and supports the head main body 30 in a swingable manner.
In this magnetic head device, the load beam 41 extends from the radial direction of the recording medium. When the recording medium is stopped, the lower surface of the head body 30 is pressed against the recording medium by the pressing force of the load beam 41. When the recording medium starts to slide in the X direction shown in the figure, an air flow is guided between the head main body 30 and the recording medium, and the trailing (b) side is lower than the leading (a) side. The main body 30 floats on the recording medium.
[0006]
[Problems to be solved by the invention]
When the head main body 30 floats on the recording medium, the head main body 30 can swing in the pitch direction and the roll direction with the vertex of the pivot 46 provided on the adapter 43 as a fulcrum. As shown in FIG. 8, the pitch direction is a vertical rotation direction (rotation direction about the Y axis) in the sliding direction (X direction) of the recording medium, and the roll direction is a direction relative to the sliding direction of the recording medium. And the vertical direction of rotation (the direction of rotation about the X axis) in the Y direction orthogonal to the vertical axis.
In order to stabilize the flying posture of the head body 30, it is necessary to reduce the roll rigidity of the flexure 33 as much as possible so that the head body 30 can easily swing in the roll direction.
[0007]
If the rigidity in the roll direction is high, for example, when the head main body 30 flies above the recording medium, the head main body 30 tilts and flies, or the head main body 30 cannot accurately follow the change in the unevenness in the radial direction of the recording medium. Problem occurs. As a result, the setting of the spacing between the core assembly 32 and the recording medium is affected.
It is also preferable that the rigidity of the flexure 33 in the pitch direction is reduced to some extent. However, if the rigidity in the pitch direction is too low, the head body 30 shakes largely in the pitch direction due to, for example, a run-out of the recording medium, causing a problem that the head body 30 is likely to collide with the recording medium. In particular, in a low-flying magnetic head device, the recording medium and the head main body 30 are easily damaged by the pitch swing of the head main body 30.
[0008]
By the way, it has been found through experiments that the roll stiffness and the pitch stiffness show different values at each position of the head body 30 (the details of the experiment and the results thereof will be described later).
In particular, the head body 30 hardly swings in the roll direction near the trailing (b) side end, but swings largely in the pitch direction. That is, the portion of the flexure 33 supporting the head body 30. It has been found that the head support portion (tongue piece) 37 has a very high roll stiffness near the trailing (b) side and a very low pitch stiffness.
Therefore, in the conventional magnetic head device, good roll stiffness and pitch stiffness could not be obtained over the entire area of the head main body 30.
[0009]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described conventional problems, and has a head body fixed to an appropriate position on a lower surface of a flexure so that good roll rigidity and pitch rigidity can be obtained over the entire area of the head body. It is an object of the present invention to provide a magnetic head device according to the above.
[0010]
[Means for Solving the Problems]
The present invention has a support member, a flexure supported by the support member, and a head main body fixed to the flexure, wherein the head main body includes a contact portion provided between the support member and the support member. In a magnetic head device that is swingable with a vertex as a fulcrum, the flexure includes a fixed portion fixedly supported by the support member, a pair of arms extending from the fixed portion to a free end side of the flexure, A head support portion having a deformable fulcrum on the free end side of the pair of arm portions and extending in the direction of the fixed portion, the end of the head body fixedly supported by the head support portion on the free end side. DepartmentIs higher than the middle between the contact portion and the deformation fulcrum.It is characterized by being located on the fixed part side.
[0011]
In the present invention, it is preferable that a restricting portion for restricting the amount of vertical movement of the flexure is provided between the head supporting portion and the supporting member. Specifically, it is preferable that the restricting portion is formed integrally with the head supporting portion in a hook shape in the direction of the supporting member, and the supporting member is inserted below the restricting portion.
Further, in the present invention, when the recording medium slides, the support member extends in a radial direction of the recording medium, and a direction from a fixed portion side to a free end side of the flexure coincides with a sliding direction of the recording medium. Is preferred.
[0012]
In the present invention, two types of magnetic head devices (only the flexure and the head main body are shown in the drawings) shown in FIGS. Angle changes in the roll direction and the pitch direction at a plurality of positions up to the trailing end were measured.
[0013]
First, an experiment was performed using the magnetic head device shown in FIG.
In FIG. 4A, a fixed portion 20 is formed on the left side of the flexure 19 in the drawing, and a pair of arms 21 and 21 extend from the fixed portion 20 to the free end side (X direction in the drawing) of the flexure. I have. A head support 22 extends from the arms 21 and 21 toward the fixed portion 20 with a deformation fulcrum A.
The flexure 19 is fixedly supported by a support member (see FIG. 8) such as a load beam 41 and an adapter 43 at a fixing portion 20. A point B on the upper surface of the head support portion 22 is a position where a vertex of a pivot (contact portion) formed on the support member contacts.
The head main body 23 has a length from the leading (a) side end to the trailing (b) side end of 6 mm and a depth of 5 mm, and the head main body 23 has a trailing ( B) The side end is fixed below the head support portion 22 of the flexure 19 in a state where it is located about 1 mm free end side from the deformation fulcrum A of the flexure 19.
[0014]
FIG. 4B is a bottom view of the flexure 19 shown in FIG. 4A and the head main body 23 fixedly supported by the flexure 19 as viewed from the back side (the side of the head main body facing the recording medium).
In the experiment, first, a center line M was set from the leading (a) side to the trailing (b) side of the head main body 23, and four positions (1), (2) and (3) 2.3 mm away from the center line M were set. A load of 0.17 gf was applied to (4). Next, a laser beam, which was finely squeezed, was applied to the surface of the head main body 23 facing the recording medium under a load, and the reflected light was used to measure how much the head main body was inclined in the roll direction and the pitch direction. And the measurement result was plotted on the graph shown in FIG.
[0015]
The vertical axis in FIG. 5 indicates the angle change (minute), and the horizontal axis indicates the four positions (1), (2), (3), and (4) with respect to the leading (a) side end of the head body 23. The position, the pivot contact position B of the flexure 19, the deformation fulcrum A of the flexure 19, and the position of the trailing (b) side end of the head main body 23 are shown.
As shown in the figure, the angle change in the roll direction decreases almost linearly from the leading (A) side end to the trailing (B) side end. That is, it is understood that the roll rigidity of the flexure 19 increases as it approaches the free end side (the X direction shown in FIG. 4A).
[0016]
On the other hand, the angle change in the pitch direction also changes almost linearly similarly to the angle change in the roll direction, and the angle change in the pitch direction at the trailing (b) side end of the head body 23 is It can be seen that it is much larger than the angle change in the direction.
As shown in FIG. 5, the intersection C between the straight line of the angle change in the roll direction and the straight line of the angle change in the pitch direction is substantially the same between the contact point B of the pivot of the flexure 19 and the deformation fulcrum A. It turns out that it is located in the middle. And, from this intersection C to the trailing (b) side end, the angle change in the roll direction is always smaller than the angle change in the pitch direction.
[0017]
That is, the roll stiffness of the flexure 19 on the free end side is always higher than the pitch stiffness of the flexure 19 at a position substantially at the middle C between the pivot contact position B and the deformation fulcrum A.
Here, the cause of the roll rigidity of the flexure increasing toward the free end side is expected to be as follows.
[0018]
The head support portion 22 is supported by the arms 21 and 21 on both sides in the width direction on the free end side of the flexure 19, so that the tongue-shaped head support portion 22 is in contact with the arms 21 and 21. The connection point is the deformation fulcrum A, and the left side of the head support portion 22 is a free end in the drawing. Therefore, the torsional rigidity of the head support portion 22 increases as it approaches the deformation fulcrum A. Since the head main body 23 is fixed to the tongue-shaped head support portion 22, the torsional rigidity of the head support portion 22 corresponds to a change in roll rotation of the head main body.
At the trailing (b) end, the torsional rigidity of the head support 22 makes it difficult for the moment of force to act in the roll direction. It acts easily in the pitch direction, and the angle change in the pitch direction at the trailing (b) side end becomes very large.
[0019]
Next, as shown in FIG. 5, the amount of deformation in the pitch direction is substantially zero in angle change at the pivot contact position B, and is substantially symmetric in the X direction with the zero point as a boundary. The rotation in the pitch direction is due to the bending deformation of the tongue-shaped head support portion 22, and the rigidity in the bending direction is substantially uniform in the X direction. Therefore, as shown in FIG. 5, it is considered that the angle change in the pitch direction is likely to be symmetrical in the left and right directions around the pivot contact position B.
[0020]
Next, an experiment was performed using the magnetic head device shown in FIG.
In FIG. 6A, in the flexure 24, the head supporting portions 27 are supported from both sides by arms 26, 26 extending in a U-shape from the fixing portion 25. In the flexure 24, the deformation fulcrums A, A of the head support 27 and the pivot contact position B are located on the same straight line N.
The head body 28 is formed to have a length of 3.2 mm from the leading (a) side end to the trailing (b) side end and a depth of 2.6 mm, and It is adhesively fixed to the lower surface of the head support 27.
[0021]
FIG. 6B is a bottom view of the flexure 24 shown in FIG. 6A and the head main body 28 fixed and supported by the flexure 24 as viewed from the side facing the recording medium.
In the experiment, first, at the three positions (5), (6), and (7) 1.1 mm away from the center line M from the leading (a) side to the trailing (b) side of the head main body 28, each of the heads was set at 0.1 mm. A load of 17 gf was applied. At this time, a laser beam that was finely focused was applied to the surface of the head body 28 facing the recording medium, and from the reflected light, how much the head body was inclined in the roll direction and the pitch direction was measured. And the measurement result was plotted on the graph shown in FIG.
[0022]
As shown in FIG. 7, it can be seen that the angle change in the roll direction and the angle change in the pitch direction both change almost linearly.
At the trailing (b) side end of the head body 28, the angle change in the roll direction is almost 0 (minute), while the angle change in the pitch direction is very large. It can be seen that the trailing (b) side end of 28 moves only in the pitch direction and hardly moves in the roll direction.
[0023]
Since the deformation fulcrums A, A and the contact position B of the pivot are on the same straight line N, the same load is applied to each position separated from the straight line N by the same distance on the leading (a) side and the trailing (b) side. When applied, the angle change in the roll direction on the leading (a) side and the angle change in the roll direction on the trailing (b) side seem to have the same value. However, as shown in FIG. 7, the angle change in the roll direction at the leading (a) side end is about 80 (minutes), whereas the angle change in the roll direction at the trailing (b) side end is actual. The change is almost 0 (minute), showing extremely different values.
This is presumably because the arm 26 extends from the fixing portion 25 and is connected to the head support 27 from the side. For example, when a load is applied to the position (7), the portion (c) of the arm 26 is bent and deformed, and the portion (d) is twisted.
[0024]
That is, as shown in FIG. 6B, the leading (a) side end of the head main body 28 is only Ta away from the base end of the arm 26 on the fixed portion 24 side, whereas the trailing (B) The side end is separated from the base end of the arm 26 by Tb which is sufficiently larger than Ta. Therefore, when a load is applied to the trailing (b) side end, the moment T increases due to the long distance Tb, the arm 26 is greatly deformed, the portion (c) is bent, and the portion (d) is bent. This causes torsion, and when a load is applied to the trailing (b) side end, the deformation in the pitch direction becomes extremely large, and the roll deformation around the X axis does not occur much. Conversely, when a load is applied to the leading (a) side end, the distance Ta is short, and the moment is small. Therefore, the change in the angle in the pitch direction is smaller on the leading (a) side than when the same load is applied to the trailing (b) side end. Therefore, it is considered that the load easily causes an angle change in the roll direction.
6A and 6B, the angle change in the pitch direction with respect to the same load is large and the angle change in the roll direction is small on the side away from the fixing portion 25. It turns out that it shows the same tendency as that shown in FIG.
[0025]
In the present invention, in order to stabilize the flying posture of the head main body, the fixing position of the head main body to the flexure is set to an appropriate position based on the experimental results described in detail above.
In order to stabilize the flying attitude of the head body, it is necessary to make the angle change in the roll direction large, especially over the entire area of the head body, and at the same time, to have a certain degree of the angle change in the pitch direction. There is. In other words, it is necessary to reduce the roll stiffness of the flexure over the entire area of the head main body and at the same time to obtain a certain degree of pitch stiffness.
[0026]
As shown in FIGS. 5 and 7, the change in the angle of the head main body in the roll direction becomes smallest on the side (the free end side of the flexure) away from the fixing portion of the flexure. At the same time, the angle change in the pitch direction is greatest on the side remote from the fixed part.
Therefore, in the present invention, the end of the head body on the trailing (b) side is shifted in the direction of the fixed portion of the flexure where the roll rigidity is reduced, and the tray of the head body is positioned at least closer to the fixed portion than the deformation fulcrum A of the flexure. The end of the ring (b) side is positioned so that the angle change in the roll direction of the trailing (b) side end can be made larger and the angle change in the pitch direction can be made relatively small as compared with the related art. It was done.
Therefore, good roll rigidity and pitch rigidity can be obtained over the entire area of the head main body, and the flying posture of the head main body can be stabilized.
[0027]
In particular, in the present invention, when the trailing end of the head main body is located closer to the fixing portion of the flexure than the middle C between the deformation fulcrum A of the flexure and the contact position B of the pivot, The angle change in the roll direction at the trailing end can be larger than the angle change in the pitch direction, that is, at the trailing end, a roll rigidity lower than the pitch rigidity can be obtained, It is possible to obtain better roll stiffness and pitch stiffness over the entire area of the head body.
[0028]
As shown in FIG. 6A, in the case of the flexure 24 in which the pivot contact position B and the deformation fulcrum A are on the same straight line, the trailing (b) side end of the head main body 28 is When the pivot is located closer to the fixing portion 25 of the flexure 24 than the deformation fulcrum A, the pivot does not come into contact with the upper surface of the head main body 28. Therefore, similarly to FIG. It is necessary to improve the shape of the flexure 24 so that it is located closer to the fixed portion 25 than the deformation fulcrum A.
[0029]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a partially exploded perspective view showing a floating type magnetic head device provided in a magneto-optical disk device as a first embodiment of the present invention.
This magnetic head device includes a head main body 1, a flexure 2, and a load beam (support member) 3.
The head body 1 includes a slider 4, a core assembly (not shown), and a back plate 5. The left side of the head main body 1 in the figure is the leading (a) side, and the right side in the figure is the trailing (b) side.
[0030]
The slider 4 is made of, for example, calcium titanate (TiCaO₃1), the lower side in FIG. 1 is the surface facing the recording medium, and the upper side in the figure is the support side fixedly supported by the flexure 2.
The core assembly includes a center core around which a coil is wound, and a side core made of one or more coils. Each of the cores is formed in a rectangular parallelepiped shape by a magnetic material such as manganese zinc (Mn-Zn) ferrite.
Each core has its lower surface flush with the lower surface of the slider 4 and is held by the slider 4. At this time, the gap between the center core and the side core on the lower surface of the slider 4 forms a magnetic gap.
[0031]
The back plate 5 shown in FIG. 1 functions as a back core, and is made of a magnetic material such as manganese zinc ferrite in a flat plate shape like the above-described core.
When a recording current flows through the coil wound around the center core, a magnetic path is formed through the center core, the side core, and the back plate (back core) 5, and a perpendicular magnetic field is applied to the recording medium from the front end of the center core. At this time, the energy of the laser beam is applied from below the recording medium, and a signal is recorded on the recording medium by magnetic field modulation or light modulation.
The flexure 2 is formed of a thin leaf spring material. On the left side of the flexure 2 in the figure, a fixing portion 6 for the load beam 3 to be described later is formed. In the fixing portion 6, a positioning hole 7 and fixing claws 8, 8, 8 are formed.
[0032]
A step is formed from both sides of the fixing portion 6 in the upward direction in the figure, and a pair of arms 9 extend from the step in the free end direction of the flexure (X direction in the figure). Further, a step portion is formed downward from the ends of the arm portions 9 and 9 in the same direction as the fixing portion 6 in the downward direction in the drawing. A part 10 is formed in the direction of the fixing part 6.
The head support 10 has a tongue shape, and is elastically deformable in the roll direction and the pitch direction with the deformation fulcrums A and A as fulcrums.
A hook-shaped restricting piece 11 is formed at an end of the head supporting portion 10 on the fixing portion 6 side by bending. At the position of the head support 10 away from the restricting piece 11 in the free end direction (X direction in the figure), a hook-shaped restricting piece 12 is formed by a notch.
[0033]
A point B shown on the head support portion 10 is a position where a vertex of a pivot (contact portion) formed on the load beam 3 abuts, and is fixed to the lower surface of the head support portion 10 by bonding or the like. The head body 1 can be swingably supported with the vertex of the pivot as a fulcrum.
The load beam 3 is formed of a leaf spring material. As shown in FIG. 1, the leading end of the load beam 3 has a step structure.
In the load beam 3, bent portions 3a are formed on both sides from the upper right side of FIG. 1 to the vicinity of the front portion, and this portion is a rigid portion. A low-rigidity leaf spring function portion (not shown) not having the bent portions 3a, 3a is provided from the end to the base end of the bent portions 3a, 3a. The width of the flat portion 3b sandwiched between the bent portions 3a, 3a gradually decreases toward the leading end of the load beam 3.
[0034]
A vertical bent surface 13 extends downward from the front end of the flat portion 3b and in a direction perpendicular to the recording medium. A plate-like pivot (contact portion) 14 projects from the center of the bottom surface of the vertical bent surface 13 in a direction perpendicular to the recording medium integrally with the vertical bent surface 13.
A parallel bent surface 15 extends from an end of the vertical bent surface 13 in a direction parallel to the recording medium and away from the flat portion 3b. A mounting surface 16 is formed on the left side of the parallel bending surface 15 in the drawing, and a positioning hole 17 is formed in the mounting surface 16.
Further, bent portions 18, 18, 18 are formed at the front end of the parallel bent surface 15 and at the front end and the rear end of the mounting surface 16, and the bent portions 18, 18, 18 form the parallel bent surface 15. And the rigidity of the mounting surface 16 is high.
[0035]
In order for the flexure 2 to be fixedly supported by the load beam 3, first, the positioning hole 17 formed in the load beam 3 and the positioning hole 7 formed in the flexure 2 are aligned, and at the same time, the parallel folding of the load beam 3 is performed. The curved surface 15 is inserted under the restriction pieces 11 and 12 formed on the head support portion 10 of the flexure 2. In this state, the fixing claws 8, 8, 8 of the flexure 2 are bent on the mounting surface 16 of the load beam 3, and a resin or an adhesive is applied to the bent fixed claw 8 and its periphery to be bonded. Fixed.
When the parallel bending surface 15 of the load beam 3 is inserted below the restriction pieces 11 and 12 formed on the head supporting surface 10 of the flexure 2, the amount of vertical movement of the flexure 2 is reduced. It is regulated within the height dimensions of 11 and 12. Therefore, for example, even if a strong impact is applied to the magnetic head device, the flexure 2 does not fluctuate beyond the height dimension of the restricting pieces 11 and 12, and the flying posture of the head main body 1 is always stable.
[0036]
In this magnetic head device, the load beam 3 extends in the radial direction of a recording medium (not shown), and the recording medium slides in the X direction shown. When the recording medium starts sliding, an air flow is guided between the head main body 1 and the recording medium, so that the trailing (b) side end of the head main body 1 is higher than the leading (a) side end. In a lowered state, it floats above the recording medium.
The head body 1 swings in the roll direction and the pitch direction with the vertex of the pivot 14 as a fulcrum, for example, in order to follow ups and downs on the recording medium.
Then, with the head body 1 floating above the recording medium, as described above, a perpendicular magnetic field is applied to the recording medium from the core provided on the head body 1, and a laser beam is emitted from below the recording medium. Energy is applied and a signal is recorded on the recording medium by magnetic field modulation or light modulation.
[0037]
FIG. 2 is a plan view of the flexure 2 of the magnetic head device shown in FIG. 1 and the head main body 1 fixedly supported by the flexure 2.
In the present invention, as shown in the figure, the trailing (b) side end of the head main body 1 is located closer to the fixed portion 6 than the deformation fulcrum A of the flexure 2.
In the present invention, as described above, the angle change in the roll direction and the pitch direction at a plurality of positions of the head main body was measured using two types of magnetic head devices, and the experimental results are shown in FIGS. . In the two types of magnetic head devices shown in FIGS. 4A and 4B and FIGS. 6A and 6B, the trailing (b) side end of the head main body 23 (or 28) is connected to the flexure 19 (or the flexure 19). 24), it is located closer to the free end side (X direction in the figure) than the deformation fulcrum A. However, when the trailing (b) side end is located on the free end side (X direction in the drawing) with respect to the deformation fulcrum A, as shown in FIGS. The change in the angle in the roll direction at the portion becomes small, and the flying posture of the head body is not stable.
[0038]
Therefore, in the present invention, based on the experimental results shown in FIGS. 5 and 7, the trailing (b) side end of the head main body 1 is located closer to the fixed portion 6 than the deformation fulcrum A as shown in FIG. By positioning, the angle change in the roll direction at the trailing (b) side end can be made larger than before, and at the same time, the angle change in the pitch direction can be made smaller than before. As a result, good roll rigidity and pitch rigidity can be obtained over the entire area of the head main body, and the flying posture of the head main body can be stabilized.
Also, as shown in FIG. 5, the straight line of the angle change in the roll direction and the straight line of the angle change in the pitch direction intersect at almost the middle C between the flexure deformation fulcrum A and the pivot contact position B. It can be seen that the angle change in the roll direction from the intermediate C to the fixed portion side is larger than the angle change in the pitch direction.
[0039]
Therefore, in the present invention, as shown in FIG. 2, the trailing (b) side end of the head main body 1 is fixed to the fixing portion 6 more than the middle C between the deformation fulcrum A of the flexure 2 and the contact position B of the pivot. It is particularly preferable that the angle change in the roll direction at the trailing (b) side end can be made larger, and at the same time, the angle change in the pitch direction becomes larger than the angle change in the roll direction. It is possible to reduce the size. Thereby, better roll stiffness and pitch stiffness can be obtained over the entire area of the head main body 1.
6A, when the deformation fulcrum A of the flexure 24 is on the same straight line as the pivot contact position B, the trailing (b) side end of the head main body 28 is changed to the deformation fulcrum A. If the flexure 24 is positioned closer to the fixing portion 25, the pivot cannot be brought into contact with the head main body 28. Therefore, it is necessary to change the shape of the flexure 24.
[0040]
FIG. 3 shows an example of a modification of the flexure shown in FIG.
In FIG. 3, an arm 26 extends in the free end direction (X direction in the drawing) from the fixing portion 25, and a head support 27 extends in the direction of the fixing portion 25 with a deformation fulcrum A between the arms 26. I have. Thereby, the deformation fulcrum A and the pivot contact position B can be prevented from being on the same straight line.
Then, as described above, the trailing (b) side end portion of the head main body is positioned closer to the fixed portion 25 than the deformation fulcrum A, and preferably, from the middle C between the deformation fulcrum A and the pivot contact position B. In addition, when the head body is located closer to the fixed portion 25, a small roll rigidity and a relatively small (slightly large) pitch rigidity can be obtained over the entire area of the head body, and the flying posture of the head body can be stabilized. Becomes possible.
[0041]
Although the present invention has exemplified the magnetic head device for the magneto-optical disk device, the present invention can be implemented in a magnetic head device for a hard disk device and other disk devices.
[0042]
【The invention's effect】
According to the present invention described in detail above, a pair of arms extend from the fixed portion to the free end side, and a head support member is formed between the arms with a deformation fulcrum in the direction of the fixed portion. When the head main body is fixedly supported under the head support portion of the flexure, the free end side end of the head main body is located closer to the fixed portion side than the deformation fulcrum, and preferably, If it is located closer to the fixed portion than the position where the formed pivot (abutting portion) abuts and the intermediate point of the deformation fulcrum, good rigidity in the roll direction and pitch direction over the entire area of the head main body can be obtained. And the flying posture of the head main body can be stabilized.
[Brief description of the drawings]
FIG. 1 is a partially exploded perspective view showing a floating magnetic head device provided in a magneto-optical disk device of the present invention;
FIG. 2 is a plan view of the flexure shown in FIG. 1 and a head body fixedly supported by the flexure;
FIG. 3 is a perspective view showing an example of a flexure optimal for a magnetic head device according to the present invention;
4A is a perspective view showing a flexure used in an experiment and a head body fixed and supported by the flexure, FIG. 4B is a bottom view of FIG. 4A,
5 is a graph showing an angle change in a roll direction and a pitch direction from a leading end to a trailing end of the head main body shown in FIG. 4;
6A is a perspective view showing a flexure used in an experiment and a head body fixed and supported by the flexure, FIG. 6B is a bottom view of FIG. 6A,
7 is a graph showing an angle change in a roll direction and a pitch direction from a leading end to a trailing end of the head main body shown in FIG. 6;
FIG. 8 is a partially exploded perspective view showing a floating magnetic head device provided in a conventional magneto-optical disk device.
[Explanation of symbols]
1,23,28 Head body
2 Flexure
3 load beam
4,19,24 slider
6,20,25 fixing part
9,26,21 arms
10,27,22 Head support
14 pivot
A Deformation fulcrum
B (Pivot) abutment position
C (between deformation fulcrum A and pivot abutment position B)

Claims (4)

A support member, a flexure supported by the support member, and a head body fixed to the flexure, wherein the head body has a vertex of a contact portion provided between the support member and the support member as a fulcrum. In the magnetic head device that is swingable, the flexure includes a fixed portion fixedly supported by the support member, a pair of arms extending from the fixed portion to a free end side of the flexure, and the pair of arms. A head support portion having a deformation fulcrum on the free end side thereof and extending in the direction of the fixed portion, wherein the free end side end of the head body fixedly supported by the head support portion is the A magnetic head device, wherein the magnetic head device is located closer to a fixed portion than an intermediate portion between a contact portion and the deformation fulcrum . 2. The magnetic head device according to claim 1, wherein a restricting portion for restricting a vertical movement of the flexure is provided between the head supporting portion and the supporting member. The magnetic head device according to claim 2, wherein the restricting portion is formed integrally with the head supporting portion in a hook shape in the direction of the supporting member, and the supporting member is inserted below the restricting portion. 4. The sliding member according to claim 1, wherein, when the recording medium slides, the support member extends in a radial direction of the recording medium, and a direction from a fixed portion side to a free end side of the flexure coincides with a sliding direction of the recording medium. The magnetic head device according to any one of the above.

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