JP2007087497A - Fixing tool for magnetic head assembly, and floating height measuring method using fixing tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing tool by which a magnetic head assembly can correctly positioned and held, and the magnetic head assembly can be easily attached and detached, and also to provide a floating height measuring method which can highly precisely measure the floating height of a slider of the magnetic head assembly from a disk surface for measurement. <P>SOLUTION: The fixing tool comprises a base 2 with an installation flat surface 2a, a positioning part 3 for positioning a support plate 21 made to project from the installation flat surface 2a, and a pressure member 6 for fixing the support plate 21 from the installation flat surface 2a. When the support plate 21 is installed on the installation flat surface 2a, the positioning part 3 comes into a support hole 26 to position the support plate 21 from the inside of the support hole 26 in the two directions at right angles to each other along the installation flat surface 2a, and the pressure member 6 is energized on the installation flat surface 2a by force of a spring 13, and the supporting plate 21 positioned by the positioning part 3 is pressurized on the installation flat surface 2a by the pressure member 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fixing jig capable of positioning and fixing a magnetic head assembly in which a slider is attached to the tip of a support plate, and a flying height of the slider from the surface of a measuring disk using the fixing jig. The present invention relates to a flying height measuring method.

  Patent Document 1 shown below discloses a magnetic head tester for measuring the flying height of a magnetic head assembly on which a slider is mounted.

  FIG. 10 is a plan view showing a positioning portion of the disclosed magnetic head assembly shown in Patent Document 1. In FIG.

  In the magnetic head tester 500 shown in FIG. 10, a magnetic head assembly 503 on which a slider 502 is mounted is installed on a holder 501. On the surface of the holder 501, a fixing member 504 having inner side surfaces 504a and 504b orthogonal to each other is provided. A pair of positioning pins 506 a and 506 b protrude from the surface of the holder 501. The magnetic head assembly 503 has a rectangular member 505 at the base, and the rectangular member 505 has outer surfaces 505a and 505b orthogonal to each other. The rectangular member 505 has holes 505c and 505d.

  The magnetic head assembly 503 is installed on the surface of the holder 501, and the fixing member 504 is 45 degrees with respect to the inner side surfaces 504a and 504b in a state where the positioning pins 506a and 506b are inserted into the holes 505c and 505d of the rectangular member 505. The inner side surfaces 504a and 504b are brought into contact with the outer side surfaces 505a and 505b of the rectangular member 505 to position the rectangular member 505 in the XY direction. .

The magnetic head tester 500 measures the flying height of the slider from the surface of the measurement disk with the measurement disk opposed to the slider with the magnetic head assembly 503 positioned and installed on the holder 501.
JP-A-2-292710

  The holder 501 provided in the conventional magnetic head tester 500 shown in FIG. 10 has the holes 505c and 505d of the rectangular member 505 inserted into the pair of positioning pins 506a and 506b, and then the fixing member 504 is inclined in the direction of 45 degrees. Since the magnetic head assembly is positioned by moving the magnetic head assembly, the positioning operation of the magnetic head assembly 503 is complicated. Further, since the surface of the rectangular member 505 is not pressed against the holder 501, the slider cannot be positioned with high accuracy in the three-dimensional direction.

  In this magnetic head tester 500, the outer surfaces 505a and 505b of the rectangular member 505 are pressed, and the holes 505c and 505d are pressed against the positioning pins 506a and 506b, whereby the magnetic head assembly 503 is positioned. In this case, the positioning reference in the XY direction of the magnetic head assembly 503 is the outer side surfaces 505a and 505b of the rectangular member, but the positioning reference when the magnetic head assembly 503 is actually assembled to the hard disk device. Are not set on the outer surfaces 505a and 505b, so that in the measurement of the flying posture using the magnetic head tester 500, the facing position of the measuring disk and the slider (the facing position on the inner circumference of the disk or the facing position on the outer circumference of the disk) ) May be different from the actual hard disk drive.

  The present invention solves the above-described conventional problems, and provides a fixing jig that can accurately position and hold the magnetic head assembly and that is easy to mount and remove the magnetic head assembly. It is aimed.

  It is another object of the present invention to provide a flying distance measuring method capable of measuring the flying distance of the slider of the magnetic head assembly from the surface of the measuring disk with high accuracy.

The present invention provides a magnetic head having a slider having at least one of a recording element and a reproducing element, and a support plate in which a circular support hole is formed in a base portion and at least a part of which the slider is attached is elastically deformable in a tip portion. In the fixing jig to which the assembly is fixed,
A pedestal having an installation plane; a positioning portion that projects from the installation plane to position the support plate; and a pressing member that fixes the support plate to the installation plane.
The positioning portion enters the support hole when the support plate is installed on an installation plane, and positions the support plate from the inside of the support hole in two directions perpendicular to each other along the installation plane. And
The pressing member is biased to the installation plane by the force of the biasing member, and the support plate positioned by the positioning portion is pressed against the installation plane by the pressing member.

  In the fixing jig of the present invention, the magnetic head assembly is positioned on the installation plane of the base with reference to the support hole of the support plate. When the magnetic head assembly is mounted on a hard disk device or the like, the support hole serves as an attachment reference, so the positioning reference to the fixing jig and the positioning reference on the hard disk device or the like can be made the same part. Various measurements can be performed under the same conditions as those of an actual hard disk device while being positioned and fixed to a fixing jig.

  The magnetic head assembly has a structure in which the support hole of the support plate is positioned in two directions orthogonal from the inside by the positioning portion, and the peripheral portion of the support hole is pressed and positioned by the pressing member by the pressing member. Therefore, since the magnetic head assembly is not only positioned with reference to the support hole, but also a large deformation force does not act on the support plate, when the magnetic head assembly is positioned on the installation plane, the installation plane and the slider Can be determined with high accuracy.

  In addition, in the state where the pressing member is moved away from the installation plane and a tensile force is generated, the positioning member is inserted into the support hole of the support plate and inserted, and then the tensile force of the pressing member is released. The magnetic head assembly can be easily and accurately attached to the installation plane of the pedestal. Further, the magnetic head assembly can be easily removed from the installation plane of the pedestal only by moving the pressing member in the direction away from the installation plane.

  In the present invention, it is preferable that the positioning portion is a cylindrical surface in which at least outer peripheral surfaces in a direction orthogonal to each other have the same center of curvature.

  Since the radius of the cylindrical surface can be determined with high accuracy, the difference between the outer peripheral surface of the positioning part and the inner diameter of the support hole of the magnetic head assembly can be made minute, and the magnetic head assembly can be positioned on the base with high accuracy. It becomes possible to do.

  Preferably, the positioning portion has a cylindrical shape, and a guide portion integrated with the pressing member is inserted through the center of the positioning portion, and the guide portion is provided by the biasing member provided at a position away from the installation plane. Is energized.

  If the guide part can be slid on the axial center of the cylindrical positioning part integrally with the pressing member, the support plate can be pressed against the installation plane with equal force by both ends of the pressing member, It is possible to prevent an excessive bending deformation force from being applied to the plate.

  In the following embodiments, the positioning portion is cylindrical, but this positioning portion has a cross-shaped planar shape having a common cylindrical center of curvature at both ends in the X direction and both ends in the Y direction. It may be.

  In the present invention, the pressing member may have an inclined surface at an end, and the peripheral edge of the support hole may be pressed by the inclined surface.

  When the peripheral portion of the support hole is pressed by the inclined surface, a centering force can be applied to the support hole by this pressing force, and the magnetic head assembly can be positioned and fixed with high accuracy. In the present invention, the pressing surfaces at both ends of the pressing member may be parallel to the installation plane, and the support plate may be sandwiched and fixed between the pressing surface and the installation plane.

  Furthermore, in the present invention, it is preferable that the pedestal is provided with a rotation positioning portion that restricts the movement of the support plate in the rotation direction around the positioning portion.

  For example, the rotation positioning portion may be configured by a through portion formed in the support plate and a projection that protrudes from an installation plane and fits into the through portion.

  A method for measuring a flying height of a magnetic head assembly according to the present invention uses any one of the fixing jigs described above so that the surface of the head assembly facing the recording medium is opposite to the installation plane. Then, it is positioned and fixed on the pedestal, and the measuring disk is rotated so as to face the slider, and the flying height of the slider from the disk surface is measured.

  Since the fixing jig of the present invention can position and fix the magnetic head assembly with high accuracy as described above, when the magnetic head assembly is supported by this fixing jig, the slider and the measuring disk Can be set under the same conditions as in an actual hard disk device, and the flying height of the slider from the disk surface can be measured with high accuracy.

  The fixing jig of the present invention can position and fix a support hole, which is a reference for mounting the magnetic head assembly, with high accuracy. Further, unnecessary elastic deformation force is not applied to the elastically deformable support plate, and therefore the relative position between the mounting plane of the pedestal and the slider can be determined with high accuracy.

  In addition, the flying height measuring apparatus of the present invention can measure with high accuracy because the slider can be opposed to the measuring disk in a state where the magnetic head assembly is positioned with high accuracy on the fixing jig.

  FIG. 1 is a perspective view showing a first embodiment of a fixing jig used when measuring the flying height of the magnetic head assembly of the present invention, and FIG. 2 is a perspective view showing the fixing jig shown in FIG. FIG. 3 is a plan view showing a state in which the magnetic head assembly shown in FIG. 2 is fixed to the fixing jig shown in FIG. 1, and FIG. 3 is a cross-sectional view cut along line IV-IV, and shows a glass disk used at the time of use and a spindle on which the glass disk is fixed and rotationally driven, cut along the extension line of the IV-IV line. It is.

  The fixing jig 1 shown in FIG. 1 fixes a magnetic head assembly on which a slider (slider) is mounted, and is installed so that the slider faces the glass disk, and then rotates the glass disk. Thus, the slider is used to measure the flying height by floating the slider from the glass disk, and is a fixing jig to which the magnetic head assembly is fixed.

  As shown in FIG. 1, a fixing jig 1 to which a magnetic head assembly is fixed has a pedestal 2 in which an installation plane 2a is formed as a flat surface. As shown in FIG. 1, a positioning portion 3 is formed on the installation plane 2a so as to protrude in a state of being positioned in two directions orthogonal to each other (X1-X2 direction and Y1-Y2 direction shown in the drawing, that is, the XY direction). Is formed.

As shown in FIG. 3, the positioning portion 3 is formed such that at least the outer peripheral surfaces in the X1-X2 direction and the Y1-Y2 direction that are orthogonal to each other are cylindrical surfaces having the same center of curvature O. In the embodiment shown in FIGS. 1 and 3, the planar shape of the outer peripheral edge 3 a of the positioning portion 3 is a columnar shape formed in a substantially circular shape.
A hole 3 b is formed at the center of the positioning portion 3.

  As shown in FIG. 1, a pressing member 6 extending in the front-rear direction (Y1-Y2 direction in the drawing) is formed at the center of the positioning portion 3. In the embodiment shown in FIG. 1, the planar shape of the pressing member 6 is a rectangle extending in the front-rear direction.

  As shown in FIG. 4, the positioning part 3 is fixed in a state of being inserted into a hole 2 b formed in the pedestal 2. FIG. 5 is an enlarged view of the periphery of the positioning portion 3 in FIG. FIG. 6 is a perspective view showing a portion of the positioning portion 3 protruding from the installation plane 2a and the periphery of the pressing member 6.

  As shown in FIG. 5, the upper surface 3c of the positioning part 3 is formed so as to protrude upward (Z2 direction in the drawing) from the installation plane 2a. The positioning part 3 is formed with a groove part 3d extending in the front-rear direction (Y1-Y2 direction in the drawing) at the center part. As shown in FIG. 5 and FIG. 6, the pressing member 6 is provided in the groove 3 d so as to be fitted.

  As shown in FIGS. 5 and 6, a guide portion 40 formed integrally with the pressing member 6 is inserted into the hole portion 3 b formed at the center of the positioning portion 3. As shown in FIG. 5, a flange 41 that extends to the side of the guide 40 is formed below the guide 40.

  A spring 13 that is an urging member formed so as to go around the outside of the guide portion 40 is formed in the hole 2b between the flange portion 41 and the lower surface 3e of the positioning portion 3. Yes. The spring 13 is in contact with the upper surface 41a of the flange portion 41 and the lower surface 3e of the positioning portion 3, and the guide portion 40 is biased toward the installation plane 2a (Z1 direction side in the drawing). Here, as described above, since the guide portion 40 is formed integrally with the pressing member 6, the pressing member 6 is also urged toward the installation plane 2a. In addition to the spring 13, other known materials such as rubber can be used as the urging member.

  In the positioning portion 3 and the pressing member 6, when the flange portion 41 formed below the guide portion 4 is pushed upward (in the Z2 direction in the drawing), the guide portion 40 slides in the hole portion 3b. The pressing member 6 moves upward in the figure and is pushed up. At this time, a tensile force toward the installation plane 2 a is generated in the pressing member 6 by the elastic force of the spring 13.

  On the other hand, when the pushing-in of the flange 41 is released, the pressing member 6 returns downward (Z1 direction in the drawing) by the tensile force based on the elastic force of the spring 13.

  As shown in FIGS. 1, 3, and 4, a step formed in the front region of the base 2 below the installation plane 2 a (step Z <b> 1 in the drawing) from the installation plane 2 a via the stepped portion 7. A surface 8 is formed. In the embodiment shown in FIG. 1, the installation plane 2a and the step surface 8 are formed in a positional relationship such that they are parallel to the height direction (Z1-Z2 direction in the drawing).

  In the embodiment shown in FIGS. 1, 3, and 4, the stepped surface 8 moves in the rotational direction (the direction of arrow A shown in FIG. 3) of the magnetic head assembly 20 around the positioning portion 3. A rotation positioning portion 9 is formed to restrict the movement. In the embodiment shown in FIGS. 1 and 5, the rotational positioning portion 9 is formed by a single cylindrical protrusion extending upward (in the Z2 direction in the drawing). As shown in FIG. 5, the upper surface 9a of the rotational positioning portion 9 is formed above the installation plane 2a.

  As shown in FIG. 5, at the end of the pressing member 6 in the front-rear direction (Y1-Y2 direction in the drawing), an inclined surface 6e that inclines in the installation plane 2a direction (downward, that is, the Z1 direction in the drawing) toward the inside. Is formed.

  As shown in FIG. 1, the fixing jig 1 has mounting holes 14, 15 and 16 formed in the installation plane 2a. These mounting holes 14, 15, 16 function as mounting holes when a magnetic head assembly 20 (described later) is fixed to the fixing jig 1 and then mounted on a flying height measuring device (not shown). Is.

  FIG. 2 is a plan view showing the magnetic head assembly 20 fixed to the fixing jig 1 from the upper side (Z2 direction side shown in FIG. 1). As shown in FIG. 2, the magnetic head assembly 20 includes a support plate 21 and a slider 22 mounted on the tip of the support plate 21. The support plate 21 includes a base portion 23 serving as a mount portion and an elastic portion 24 that can be elastically deformed. The slider 22 is attached to the tip portion 25 of the elastic portion 24. The support plate 21 is made of, for example, a metal material. In the embodiment shown in FIG. 2, the elastic portion 24 is formed to be elastically deformable, and a part of the support plate 21 is elastically deformable. You may be comprised as elastically deformable.

  A support hole 26 having a circular planar shape is opened in the base 23, and the base 23 is attached to, for example, a scanning actuator mechanism in a hard disk device (not shown) using the support hole 26 as a support reference. .

  A penetration part 27 is formed in the elastic part 24. The penetrating portion 27 has a function to ensure alignment when mounted in the hard disk. In the embodiment shown in FIG. 2, the planar shape of the penetrating portion 27 is formed as an oval shape. Yes.

  In the embodiment shown in FIG. 2, a plurality of holes 42 are also formed in the base portion 23 and the elastic portion 24. The support plate 21 is provided with a conductor for supplying electric power to a magnetic head (not shown) provided in the slider 22 or taking out electric power from the magnetic head. The illustration is omitted for easy understanding.

  The magnetic head provided in the slider 22 can be configured to include at least one of a recording element and a reproducing element.

  3 and 4 show a state in which the magnetic head assembly 20 is fixed to the fixing jig 1.

  As shown in FIGS. 3 and 4, the magnetic head assembly 20 is fixed to the installation plane 2 a of the fixing jig 1.

  As shown in FIGS. 3 and 4, in the state where the magnetic head assembly 20 is fixed to the installation plane 2 a, the positioning portion 3 of the fixing jig 1 is formed on the magnetic head assembly 20. The support hole 26 is inserted into the support hole 26.

  At this time, as described above, the positioning portion 3 is positioned in the XY directions, which are two directions perpendicular to each other along the installation plane 2a, so that the support hole 26 of the support plate 21 is positioned in the positioning portion. 3, the support plate 21 is also positioned in the XY directions.

  In this way, the pressing member 6 is urged toward the installation plane 2 a in a state where the positioning portion 3 enters the instruction hole 26 of the support plate 21. Therefore, the support plate 21 positioned by the positioning portion 3 is pressed against the installation plane 2a by the pressing member 6 in a state of being sandwiched between the pressing member 6 and the installation plane 2a. . In this way, the support plate 21 is fixed to the installation plane 2a.

  As shown in FIGS. 3 and 4, the through portion 27 formed in the magnetic head assembly 20 in a state where the magnetic head assembly 20 is fixed to the installation plane 2 a of the fixing jig 1. The rotation positioning portion 9 formed on the step surface 8 of the fixing jig 1 is inserted therein. In the embodiment shown in FIGS. 3 and 4, the width dimension W <b> 1 of the through portion 27 is formed to be substantially the same as the diameter D <b> 1 of the rotational positioning portion 9.

  In a state where the magnetic head assembly 20 is locked to the pedestal 2 of the fixing jig 1, as shown in FIG. 4, the lower surface of the base 23 of the magnetic head assembly 20 is placed on the installation plane 2a. In contact.

  On the other hand, as shown in FIG. 4, in a state where the magnetic head assembly 20 is fixed to the installation plane 2a, the elastic portion 24 of the magnetic head assembly 20 is spaced from the step surface 8. It is formed to be located. Therefore, when the magnetic head assembly 20 is fixed to the installation plane 2a, the elastic portion 24 is in a free state, and the elastic force of the elastic portion 24 can be effectively exhibited. Yes. Further, since the elastic portion 24 exhibits elasticity, it can be moved in the vertical direction (Z1-Z2 direction in the drawing). As shown in FIG. 4, when the magnetic head assembly 20 is locked to the installation plane 2a, the tip 25 is located on the front side (Y1 direction side in the drawing) of the fixing jig 1. It is configured as follows. Therefore, the slider 22 mounted on the tip portion 25 is also configured to be positioned on the front side of the fixing jig 1. Therefore, since the slider 22 can be moved in the vertical direction as the elastic portion 24 moves in the vertical direction, the slider 22 can move (float) in a direction away from the surface 32 of the glass disk 30 described later. It is said that.

  The fixing jig 1 is fixed to a flying height measuring device (not shown) in a state where the magnetic head assembly 20 is fixed to the installation plane 2a as described above. As shown in FIG. 4, the slider 22 mounted on the magnetic head assembly 20 is installed at a position facing the glass disk 30.

  The glass disk 30 is formed, for example, in the same shape and size as a recording disk, and its planar shape is a donut shape in which a hole 31 having a circular planar shape is formed in the center. A spindle 33 is inserted into the hole 31 of the glass disk 30, and the spindle 33 is driven to rotate in a predetermined direction as indicated by an arrow with a center line OO line as a center of rotation. 30 also rotates.

  When the glass disk 30 rotates in the state shown in FIG. 4, an air flow generated by the rotation of the glass disk 30 generates a positive pressure on the surface of the slider 22 facing the glass disk 30, and the magnetic head The assembly 20 moves (floats) in a direction away from the surface 32 of the glass disk 30.

  An operation method for fixing the magnetic head assembly 20 to the installation plane 2a of the fixing jig 1 will be described with reference to FIG.

  The flange portion 41 formed on the guide portion 40 is pushed upward (in the Z2 direction in the drawing). Then, the pressing member 6 formed integrally with the guide portion 40 also moves upward (Z2 direction in the drawing). At this time, a gap W2 between the lower surface of the pressing member 6 and the installation plane 2a is generated. The support plate 21 formed in the magnetic head assembly 20 is inserted into the gap W2, and the support hole 26 is fitted into the positioning portion 3. As described above, the pressing member 6 moves upward to generate the interval W2, and the positioning portion 3 can easily enter the support hole 26 of the support plate 21.

  When the pressing of the flange portion 41 is released in a state where the positioning portion 3 is inserted into the support hole 26 of the magnetic head assembly 20, the guide portion 40 is moved downward (illustrated) by the elastic force of the spring 13. Z1 direction) and returns to the position of the solid line from the one-dot chain line shown in FIG. At this time, since the pressing member 6 is urged to the installation plane 2a by the elastic force of the spring 13, the support plate 21 is pressed against the installation plane 2a by the pressing member 6, so that the magnetic A head assembly can be fixed to the installation plane 2a.

  In the fixing jig 1, an inclined surface 6 e is formed at the end of the pressing member 6. However, as shown in FIG. 5, in the state where the support plate 21 is fixed to the installation plane 2 a, The inside of the support hole 26 abuts on the inclined surface 6e, and the peripheral edge of the support plate 21 is pressed by the inclined surface 6e.

  In the fixing jig 1 shown in FIGS. 1 to 5, the magnetic head assembly 20 is positioned on the installation plane 2 a of the base 2 with reference to the support hole 26 of the support plate 21. When the magnetic head assembly 20 is mounted on a hard disk device or the like, the support hole 26 serves as an attachment reference. Therefore, the positioning reference for the fixing jig 1 and the positioning reference for the hard disk device or the like can be made the same part. With the head assembly 20 positioned and fixed to the fixing jig 1, various measurements can be performed under the same conditions as an actual hard disk device.

  Further, in the magnetic head assembly 20, the support hole 26 of the support plate 21 is positioned in two directions (XY directions) orthogonal from the inside by the positioning portion 3, and the peripheral portion of the support hole 26 is installed by the pressing member 6. Since the magnetic head assembly 20 is positioned by being pressed by 2a, not only the magnetic head assembly 20 is positioned with reference to the support hole 26, but also a large deformation force does not act on the support plate 21, so the magnetic head assembly When 20 is positioned on the installation plane 2a, the relative position between the installation plane 2a and the slider 22 can be determined with high accuracy.

  Further, in a state where the pressing member 6 is moved away from the installation plane 2a and the pulling force is generated, the positioning portion 3 is inserted into the supporting hole 26 of the supporting plate 21 and inserted therethrough, and then the pressing member 6 is generated. By canceling the pulling force, the magnetic head assembly can be easily and accurately attached to the installation plane 2a of the base 2. Further, the magnetic head assembly 20 can be easily detached from the installation plane 2a of the base 2 only by moving the pressing member 6 away from the installation plane 2a.

  Further, the positioning portion 3 is formed such that at least the outer peripheral surfaces in the X1-X2 direction and the Y1-Y2 direction that are orthogonal to each other are cylindrical surfaces having the same center of curvature O, and FIG. In the embodiment shown in FIG. 3, the planar shape of the outer peripheral edge 3 a of the positioning portion 3 is a columnar shape formed in a substantially circular shape.

  Since the radius of the cylindrical surface can be determined with high accuracy, the difference between the outer peripheral surface of the positioning portion 3 and the inner diameter of the support hole 26 of the magnetic head assembly 20 can be made minute, and the magnetic head assembly 20 can be mounted on the base 2. It becomes possible to position with high precision to the said installation plane 2a.

  Further, in the embodiment shown in FIGS. 1 to 5, the positioning portion 3 has a cylindrical shape, and a guide portion 40 integrated with the pressing member 6 is inserted into the center of the positioning portion 3 so that the positioning portion 3 can be removed from the installation plane 2a. The guide part 40 is urged by the spring 13 provided at a distant position.

  When the guide portion 40 can be slid on the axial center of the columnar positioning portion 3 integrally with the pressing member 6 in this way, the support plate 21 can be installed with equal force by both ends of the pressing member 6. 2a can be pressed and an excessive bending deformation force can be prevented from being applied to the support plate 21.

  Further, in the fixing jig 1, since the pressing member 6 has the inclined surface 6e at the end, the peripheral portion of the support hole 26 is pressed by the inclined surface 6e as shown in FIG. The

  As described above, when the peripheral portion of the support hole 26 is pressed by the inclined surface 6e, a centering force can be applied to the support hole 26 by this pressing force, and the magnetic head assembly 20 is positioned with high accuracy. Can be fixed.

  Further, in the fixing jig 1, the step surface 8 formed in front of the pedestal 2 is moved to the rotation direction of the support plate 21 around the positioning portion 3 (the direction of arrow A shown in FIG. 3). A rotational positioning unit 9 that restricts movement is provided.

  Only by fixing the magnetic head assembly 20 to the installation plane 2a of the pedestal 2 by only inserting the positioning portion 3 and the support hole 26, as shown by an arrow A in FIG. Since the solid 20 rotates and moves in the direction of the arrow A with the positioning portion 3 as the rotation center, the positioning in the direction of rotation (the direction of the arrow A in the figure) cannot be performed accurately. In order to solve this problem, the fixing jig 1 is provided with a rotation positioning portion 9 on the stepped surface 8 to thereby perform accurate positioning in the rotation direction.

  In the embodiment shown in FIG. 3, the diameter D <b> 1 of the rotational positioning portion 9 is formed so as to be substantially the same as the width dimension W <b> 1 of the through portion 27 of the magnetic head assembly 20. Therefore, the magnetic head assembly 20 can be reliably positioned in the rotational direction by fitting the rotational positioning portion 9 into the through portion 27. At this time, as described above, the upper surface 9a of the rotational positioning portion 9 is formed above the installation plane 2a (Z2 direction side in the drawing), so that the rotational positioning portion 9 is disengaged from the penetrating portion 27. Thus, it is possible to prevent the positional deviation of the magnetic head assembly 20 in the rotational direction.

  The support plate 21 is positioned by pressing the magnetic head assembly 20 positioned easily and accurately in this way against the installation plane 2a of the base 2 by the urging force of the pressing member 6. In this state, it can be securely fixed to the installation plane 2a.

  Thus, since the fixing jig 1 can position and fix the magnetic head assembly 20 with high accuracy, the slider 22 is supported when the fixing jig 1 supports the magnetic head assembly 20. And the glass disk 30 for measurement can be set to the same conditions as in an actual hard disk device, and the flying height of the slider 22 from the surface 32 of the glass disk 30 can be measured with high accuracy. Become.

  In the present invention, as shown in FIG. 7, the pressing surfaces 6a at both ends of the pressing member 6 are parallel to the installation plane 2a, and the support plate 21 is sandwiched between the pressing surface 6a and the installation plane 2a. And may be fixed.

  Further, in the embodiment shown in FIGS. 1 to 6, the positioning portion 3 has a cylindrical shape. However, as shown in FIG. 8, the positioning portion 3 has both ends in the X1-X2 direction and Y1-Y2 direction. A planar shape having a cylindrical surface 103 a having a common center of curvature O at both ends may be the cross-shaped positioning portion 103. Even with this configuration, the radius of the cylindrical surface 103a can be determined with high accuracy, so that the difference between the cylindrical surface 103a of the positioning portion 103 and the inner diameter dimension of the support hole 26 of the magnetic head assembly 20 is very small. In addition, the magnetic head assembly 20 can be positioned on the installation plane 2a of the base 2 with high accuracy.

In the fixing jig 1, the rotational positioning portion 9 is configured as one cylindrical protrusion, and the rotational positioning portion 9 is fitted into the through-hole 27 formed in the magnetic head assembly 20. The magnetic head assembly 20 is rotationally positioned, but the present invention is not limited to this. For example, as shown in FIG. 9, the magnetic head assembly 20 is formed on the stepped surface 8 of the fixing jig 1. Two columnar rotational positioning portions 109 and 110 are arranged in a positional relationship facing each other at an interval in the width direction, and side edges 21a and 21b of the support plate 21 of the magnetic head assembly 20 are arranged. In this state, the position of the rotation direction (direction of arrow A in the figure) is regulated so as to be sandwiched between the two rotation positioning portions 209 and 210 while in contact with the rotation positioning portions 209 and 210. Configure It may be. In this way, the magnetic head assembly 20
It is possible to reliably perform positioning in the rotational direction. Further, only one of the rotational positioning portions 209 and 210 may be formed, and the position of one of the side edges 21a and 21b of the support plate 21 may be regulated by the rotational positioning portions 209 and 210. However, it is preferable that the support plate 21 is sandwiched between the two rotational positioning portions 209 and 210 because positioning accuracy is improved.

  In the fixing jig 1, the structure in which the support hole 26 enters the positioning portion 3 has been described as an example. However, holes other than the support hole 26 are configured to be fitted with the positioning portion 3. May be. In this case, the hole 42 formed in the magnetic head assembly 20 shown in FIG. 2 may be configured to enter the positioning portion 3, or a hole not shown in FIG. You may comprise so that it may enter in the positioning part 3. FIG.

The perspective view which shows 1st Embodiment of the fixing jig of the magnetic head assembly of this invention from upper side, FIG. 2 is a plan view showing the magnetic head assembly fixed to the fixing jig shown in FIG. FIG. 2 is a plan view showing the state in which the magnetic head assembly shown in FIG. 2 is locked to the fixing jig shown in FIG. FIG. 4 is a cross-sectional view of the magnetic head assembly and the fixing jig shown in FIG. 3 cut along line IV-IV. The glass disk that is locked during use and the spindle on which the glass disk is fixed and rotationally driven are fixed to the IV- The figure cut and shown on the extended line of the IV line, The partial expanded sectional view of the positioning part and press part shown in FIG. The partial expansion perspective view of the positioning part 3 shown in FIG. 1 and a press member, The partial expanded sectional view which shows the other form of the positioning part shown in FIG. The top view which shows the other form of the positioning part, The top view which shows the other form of a rotation positioning part, A plan view showing a conventional magnetic head tester,

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixing jig 2 Base 2a Installation plane 3 Positioning part 6 Pressing member 6e Inclined surface 9 Rotating positioning part 20 Magnetic head assembly 21 Support plate 22 Slider 26 Support hole 27 Through part 30 Glass disk

Claims (7)

A magnetic head assembly having a slider having at least one of a recording element and a reproducing element, and a support plate in which a circular support hole is formed in the base and the slider is attached to the tip is elastically deformable. In the fixing jig,
A pedestal having an installation plane; a positioning portion that projects from the installation plane to position the support plate; and a pressing member that fixes the support plate to the installation plane.
The positioning portion enters the support hole when the support plate is installed on an installation plane, and positions the support plate from the inside of the support hole in two directions perpendicular to each other along the installation plane. And
The fixing member, wherein the pressing member is urged against the installation plane by the force of an urging member, and the support plate positioned by the positioning portion is pressed against the installation plane by the pressing member.   2. The fixing jig according to claim 1, wherein the positioning portion is a cylindrical surface having outer peripheral surfaces at least in directions orthogonal to each other and having the same center of curvature.   The positioning portion is cylindrical, and a guide portion integrated with the pressing member is inserted through the center of the positioning portion, and the guide portion is biased by the biasing member provided at a position away from the installation plane. The fixing jig according to claim 1 or 2.   The fixing jig according to claim 1, wherein the pressing member has an inclined surface at an end portion, and the peripheral portion of the support hole is pressed by the inclined surface.   The fixing jig according to any one of claims 1 to 4, wherein the pedestal is provided with a rotation positioning portion that restricts movement of the support plate in the rotation direction around the positioning portion.   The fixing jig according to claim 5, wherein the rotation positioning portion includes a through portion formed in the support plate and a protrusion that protrudes from an installation plane and fits into the through portion.   A fixing jig according to claim 1 is used, and the head assembly is positioned and fixed on the pedestal so that the surface of the slider facing the recording medium faces away from the installation plane, and measurement is performed. A method for measuring a flying height of a magnetic head assembly, comprising: measuring a flying height of the slider from the disk surface by rotating a disk for use against the slider.

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