JP2013206506A - Disk inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a head assembly being expendables of a disk inspection device from being damaged by bringing a magnetic head into contact with a load bar with a comparatively simple configuration and preventing a gimbal from being deformed by preventing unneeded force from being applied to the gimbal.SOLUTION: Head means of a magnetic disk inspection device is configured by including: a head assembly part provided with a magnetic head and a gimbal in which a projecting lift tab is formed on a tip part with the magnetic head held, and a boss hole having a projection is formed on a surface opposite from a surface holding the magnetic head on a side opposite from a side with the lift tab formed; and a suspension adapter part which is provided with a load bar for regulating the height of the magnetic head of the head assembly part by pressing the lift tab, wherein a hole part through which the boss hole formed in the gimbal of the head assembly part is inserted is formed, and the head assembly part is mounted by inserting the boss hole formed in the gimbal into the hole part.

Description

  The present invention relates to a disk inspection apparatus for inspecting a magnetic disk, and more particularly to a disk inspection apparatus provided with a head assembly having a lift tab formed at the tip.

  In a disk inspection device that tests the electrical characteristics of a magnetic disk by writing test data to the magnetic disk and reading the written data, the outer periphery of the magnetic disk mounted on the spindle shaft is mounted on the head assembly that mounts the magnetic head when not accessed. There is a system in which a head assembly having a lift tab formed at the tip is loaded and unloaded from a magnetic disk in correspondence with a ramp loading type head loading mechanism held on an inclined surface provided outside the unit.

  As a configuration corresponding to a ramp load type head load mechanism, Patent Document 1 describes a method in which a lift tab is pressed to load and unload.

  On the other hand, Patent Documents 2 and 3 describe a rotation type loading mechanism. In this case, the head assembly is rotated and loaded and unloaded.

  Further, Patent Document 4 describes a head loading mechanism that facilitates replacement of the head assembly.

JP-A-10-208420 JP-A-10-208419 JP-A-4-295678 JP 2009-4050 A

  In a magnetic disk testing device, the magnetic head used for the test is a consumable item. When a certain number of magnetic disks are inspected or the output of the head decreases, the head to which the magnetic head used until then is attached The assembly is removed from the test apparatus, and a new head assembly is incorporated into the magnetic disk test apparatus to continue the test.

  When the new head assembly is mounted on the test apparatus after the used head assembly is removed, the magnetic head attached to the new head assembly may be struck against other parts of the test apparatus to destroy the magnetic head. It had to be done with great care so that the replacement work took time.

  In order to increase the inspection throughput using an inspection apparatus having a small footprint, it is desired to inspect both surfaces of the magnetic disk simultaneously.

  In the method of loading and unloading the head assembly having a lift tab formed at the tip described in Patent Document 1 from the magnetic disk, the system performs a single-sided test of the magnetic disk. Difficult to apply.

  In the systems described in Patent Documents 2 and 3, it is necessary to set the lift tab portion on the load bar and attach the head assembly to the head fixing portion in order to attach the head assembly, but damage due to contact between the magnetic head and the load bar. It must be installed with care so as not to occur.

  Patent Document 4 describes a configuration in which the load bar can move with respect to the lift tab so that the magnetic head does not contact the load bar when the head assembly is attached to the head fixing portion. By adopting a configuration in which the lift tab is movable, the overall configuration is complicated.

  The present invention solves the above-described problems of the prior art, and prevents a magnetic head from coming into contact with a load bar with a relatively simple structure when replacing a consumable head assembly. Another object is to provide a disk inspection apparatus that prevents deformation of the gimbal by preventing unnecessary force from being applied to the gimbal and shortens the mounting time.

  In order to solve the above-described problems, in the present invention, spindle shaft means for holding and rotating a magnetic disk, and test data is written to the magnetic disk rotated by the spindle shaft means, and the written test data is read to read the magnetic disk. Head means having a magnetic head for detecting the electrical characteristics of the disk, and signal processing means for inspecting the electrical characteristics of the magnetic disk by processing a test data detection signal read from the magnetic disk by the magnetic head of the head means And a control means for controlling the spindle shaft means, the head means, and the signal processing means. And a gimbal with a boss hole on the side opposite to the side on which the lift tab is formed. And a suspension adapter portion having a load bar for defining the height of the magnetic head of the head assembly portion and mounting the head assembly portion. A gimbal is provided on the surface of the suspension adapter portion where the head assembly portion is mounted. A hole corresponding to the boss hole is provided, an inclined surface is formed on one side of the mounting surface, and the gimbal of the head assembly part is aligned with the inclined surface of the suspension adapter part so that a part of the boss hole of the gimbal is formed. The head assembly portion and the suspension adapter portion were formed so that the lift tab of the gimbal was positioned below the row bar of the suspension adapter portion while being inserted into the hole portion of the block body.

  In order to solve the above-mentioned problems, in the present invention, the spindle shaft means for holding and rotating the magnetic disk, the test data is written to the magnetic disk rotated by the spindle shaft means, and the written test data is read. And a head means having a magnetic head for detecting the electrical characteristics of the magnetic disk, and a signal for inspecting the electrical characteristics of the magnetic disk by processing a test data detection signal read from the magnetic disk by the magnetic head of the head means In a magnetic disk inspection apparatus having a processing means, a spindle shaft means, a head means, and a control means for controlling a signal processing means, the head means has a magnetic head and a projecting shape at the tip end holding the magnetic head. The side opposite to the side that holds the magnetic head on the side opposite to the side on which the lift tab is formed A head assembly portion having a gimbal formed with a boss hole having a protrusion on the surface, and a load bar for defining the height of the magnetic head of the head assembly portion by pressing a lift tab, A hole portion for inserting a boss hole formed in the gimbal is formed, and a suspension adapter portion for mounting the head assembly portion by inserting the boss hole formed in the gimbal into the hole portion is configured.

  According to the present invention, in the magnetic disk inspection apparatus, when replacing the head assembly which is a consumable item, it is possible to prevent the magnetic head from being damaged due to contact with the load bar with a relatively simple configuration, The gimbal is prevented from being deformed by applying unnecessary force to the gimbal, and the installation time can be shortened.

1 is a block diagram showing an overall schematic configuration of a magnetic disk inspection apparatus according to an embodiment of the present invention. It is an arrow view of the AA cross section in the structure shown in FIG. It is a top view of the head assembly concerning the example of the present invention. It is sectional drawing of the front of the head assembly which concerns on the Example of this invention. 1 is a perspective view of a suspension adapter according to an embodiment of the present invention. FIG. 3 is a front view of the head assembly and the suspension adapter showing an initial state in which the head assembly according to the embodiment of the present invention is assembled into the suspension adapter. FIG. 3 is a front view of the head assembly and the suspension adapter showing a state where the head assembly according to the embodiment of the present invention is incorporated in the suspension adapter.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing the configuration of a magnetic disk inspection apparatus appropriately applying the present invention. Reference numeral 1 denotes a magnetic disk to be inspected, and 10 denotes a magnetic disk rotation drive unit, which includes a spindle shaft 11 that can be rotated by mounting the magnetic disk 1, and a motor 12 that rotationally drives the spindle shaft 11.

  Reference numeral 310a denotes a head assembly on which a magnetic head 311a for writing / reading a magnetic signal to / from the magnetic disk 1 mounted on the spindle shaft 11 and being driven to rotate by the motor 12 is mounted. 320a is a suspension adapter for mounting the head assembly 310a. It is. In this embodiment, since both surfaces of the magnetic disk 1 are inspected simultaneously, a head assembly 310b on which a magnetic head 311b for inspecting the back surface of the magnetic disk 1 is mounted and a suspension adapter 320b are provided.

The suspension adapter 320a and the suspension adapter 320b are rotationally driven by motors 330a and 330b, respectively. Motors 330a and 330b are held by support arms 340a and 340b, respectively. The support arms 340a and 340b are rotatably attached to the support plate 350 via shafts 341a and 341b, respectively.
A control / signal processing unit 50 is a disk rotation drive circuit unit 51 that controls the rotation drive of the motor 12 of the magnetic disk rotation drive unit 10 and writes magnetic signals on both surfaces of the magnetic disk 1 by a pair of magnetic heads 311a and 311b. The read / write test control unit 52 for controlling the signal for reading out the written signal, the motor control unit 53 for controlling the motors 330a and 330b for driving the head assemblies 310a and 310b, the disk rotation drive circuit unit 51 and the read / write A microprocessor unit (MPU) 53 is provided which controls the write test control unit 52 and the motor control unit 53 to process the result of the read / write test and determine the result.

  Reference numeral 60 denotes an input / output device that inputs information on the type of magnetic disk to be inspected and conditions for the read / write test to the control / signal processing unit 50, and displays the results of the read / write test from the control / signal processing unit 50. Output.

  FIG. 2 is a view of the AA cross section of FIG. 1 as viewed from the direction of the arrow. The head assembly 310b is driven by the motor 330b and swings in the direction of the arrow, and writes test data to the magnetic disk 1 mounted on the spindle shaft and driven to rotate by the motor 12, and the written data is read from the magnetic disk 1. read out. Control of the motor 12 and the motors 330a and 330b during the read / write test is controlled by the disk rotation drive circuit unit 51 and the motor control unit 53 of the control / signal processing unit 50, respectively.

  FIG. 3A shows a plan view of the head assembly 310. The head assembly 310 includes a gimbal 311 and a magnetic head 312, and the magnetic head 312 is mounted near the tip of the gimbal 311. A boss hole 315 provided on the flat surface 314 opposite to the side on which the head 312 of the gimbal 311 is mounted is used as a guide when the head assembly 310 is attached to the suspension adapter 320. A tip portion (lift tab) 313 of the gimbal 311 is formed in a thin plate shape. In the ramp loading method, which is the mainstream head loading mechanism instead of the conventional contact start / stop method, the head assembly 310 is driven by the motor 330 when the magnetic disk 1 stops rotating or is not accessed. The head assembly 310 is brought into an unloaded state by rotating and causing the lift tab 313 to ride on an inclined surface (ramp: not shown) provided outside the outer periphery of the magnetic disk 1.

  FIG. 3B shows a cross-sectional view of the front of the head assembly 310. The gimbal 311 is bent at a portion 316, and a boss hole 314 is processed on one side thereof.

  FIG. 4 shows the appearance of the suspension adapter 320. In the suspension adapter 320, a hole 323 into which the boss hole 314 of the head assembly 310 is inserted is formed in the upper surface 322 of the main body block 321, and an inclined surface 325 is formed at one end of the upper surface 322. Further, on the other side of the upper surface 322, a wall surface portion 324 is formed as a guide surface when the head assembly 310 is mounted. Further, an arm portion 326 extends from the main body block 321, a rising portion 327 is formed at the tip, and a load bar 328 is formed at the tip of the rising portion 327.

  The load bar 328 is formed thinner than the thickness of the magnetic head 312. That is, when the lift tab 313 at the tip of the gimbal 311 contacts the lower surface of the load bar 328, the upper surface of the load bar 328 becomes lower than the upper surface of the magnetic head 312 attached to the gimbal 311, The load bar 328 is configured not to contact the surface of the magnetic disk 1 when loaded on the disk 1.

  Next, a method of attaching the head assembly 310 shown in FIGS. 3A and 3B to the suspension adapter 320 shown in FIG. 4 will be described with reference to FIGS. 5A and 5B.

  When the read / write test is repeated while exchanging the magnetic disk in the magnetic disk inspection apparatus having the configuration shown in FIG. 1, the fine protrusions existing on the surface of the magnetic disk collide with the magnetic head and damage the magnetic head. In addition, since the magnetic head is worn by repeating loading and unloading with the word for replacing the magnetic disk, the magnetic head is replaced after a certain number of sheets are inspected. This replacement is performed by removing the used head assembly 310 from the suspension adapter 320 and attaching a new head assembly 310 to the suspension adapter 320.

  First, in the configuration shown in FIG. 1, the support plate 350 is moved to the right side of the drawing by using means not shown, and the head assembly 310 a and the head assembly 310 a are retracted from the spindle shaft 11. Next, the support arms 340a and 340b are rotated 90 degrees around the axes 341a and 341b, respectively, and the head assembly 310a and the head assembly 310a are rotated 90 degrees upward or downward, respectively.

  In this state, as shown in FIG. 5A, the flat surface 314 of the gimbal 311 of the head assembly 310 is slid downward while being pressed against the inclined surface 325 of the suspension adapter 320 to form the flat surface 314 of the gimbal 311. A part of the boss hole 315 is hooked on the hole 323 of the suspension adapter 320. At this time, the magnetic head 312 attached near the tip of the gimbal 311 is located at a position lower than the load bar 328 at the tip of the suspension adapter 320, so that the magnetic head 312 does not contact the load bar 328.

  Next, as shown in FIG. 5B, the boss hole 315 of the gimbal 311 is pushed in until it completely enters the hole 323 of the suspension adapter 320. At this time, the lift tab 313 at the tip of the suspension adapter 320 abuts against the lower surface of the load bar 328, thereby positioning the magnetic head 312. In this state, the fixed arm 329 is moved so that the flat surface 314 of the gimbal 311 is brought into close contact with the upper surface 322 of the suspension adapter 320 and fixed. As a result, the head assembly 310 can be attached to the suspension adapter 320 without applying excessive force to the gimbal 311.

  As mentioned above, although the invention made by the present inventor has been specifically described based on the embodiments, it is needless to say that the present invention is not limited to the above embodiments and can be variously modified without departing from the gist thereof. Yes.

DESCRIPTION OF SYMBOLS 1 ... Magnetic disk 10 ... Magnetic disk rotation drive part 11 ... Spindle shaft 12 ... Motor 50 ... Control / signal processing part 60 ... Input / output device 310a, 310b ... Head assembly 311 ... Gimbal 312 ... Magnetic head 313 ... Load bar 315 Boss hole 320a, 320b ... Suspension adapter part 321 ... Main body block part 322 ... Upper surface 323 ... Hole part 325 ... -Inclined surface 328 ... Lift tab.

Claims (9)

Spindle shaft means for holding and rotating the magnetic disk;
Head means comprising a magnetic head for writing test data on a magnetic disk rotated by the spindle shaft means, and reading the written test data to detect electrical characteristics of the magnetic disk;
Signal processing means for inspecting electrical characteristics of the magnetic disk by processing a detection signal of the test data read from the magnetic disk by the magnetic head of the head means;
A magnetic disk inspection device comprising a control means for controlling the spindle shaft means, the head means, and the signal processing means,
The head means includes the magnetic head and a gimbal that holds the magnetic head and is formed with a protruding lift tab at the tip, and a boss hole is formed on the opposite side of the lift tab. A head assembly portion; and a suspension adapter portion having a load bar that defines a height of the magnetic head of the head assembly portion and mounting the head assembly portion, and mounting the head assembly portion of the suspension adapter portion A hole corresponding to the boss hole of the gimbal is provided on the surface to be mounted, and an inclined surface is connected to one side of the mounting surface, and the gimbal of the head assembly portion is connected to the suspension adapter portion. The gimbal lift with a part of the boss hole of the gimbal being inserted into the hole of the block body along the inclined surface. Bed magnetic disk inspection apparatus characterized by is the head assembly portion and said suspension adapter portion is formed so as to be positioned below the row bar of the suspension adapter unit.   The head means includes two pairs of the head assembly portion and the suspension adapter portion, and the two pairs of the head assembly portion and the suspension adapter portion simultaneously inspect both surfaces of the magnetic disk. Item 2. A magnetic disk inspection apparatus according to Item 1.   The gimbal of the head assembly portion is formed by bending a side on which the magnetic head is mounted with respect to a portion where the boss hole is formed, on a side opposite to a projection side of the boss hole. Item 3. The magnetic disk inspection apparatus according to Item 1 or 2.   4. The magnetic disk inspection apparatus according to claim 1, wherein the row bar of the suspension adapter part is formed thinner than a thickness of the magnetic head mounted on the head assembly part. Spindle shaft means for holding and rotating the magnetic disk;
Head means comprising a magnetic head for writing test data on a magnetic disk rotated by the spindle shaft means, and reading the written test data to detect electrical characteristics of the magnetic disk;
Signal processing means for inspecting electrical characteristics of the magnetic disk by processing a detection signal of the test data read from the magnetic disk by the magnetic head of the head means;
A magnetic disk inspection device comprising a control means for controlling the spindle shaft means, the head means, and the signal processing means,
The head means holds the magnetic head and the magnetic head, a protruding lift tab is formed at the tip, and the side opposite to the side where the lift tab is formed is opposite to the surface holding the magnetic head. And a gimbal having a boss hole having a protrusion on the surface thereof, and a load bar for defining the height of the magnetic head of the head assembly portion by pressing the lift tab. A hole portion for inserting a boss hole formed in the gimbal of the head assembly portion is formed, and a suspension adapter portion for mounting the head assembly portion by inserting the boss hole formed in the gimbal into the hole portion. A magnetic disk inspection apparatus comprising:   One piece of the surface of the suspension adapter portion on which the head assembly portion is mounted is connected to an inclined surface, and the inclined surface forms a gimbal of the head assembly portion when the head assembly portion is mounted on the suspension adapter portion. The lift tab of the gimbal moves the row bar of the suspension adapter part in a state where a part of the protrusion of the boss hole provided in the gimbal is pressed into the inclined surface of the suspension adapter part into the hole part of the suspension adapter part. 6. The magnetic disk inspection device according to claim 5, wherein the magnetic disk inspection device is formed so as to be located below the magnetic disk.   The head means includes two pairs of the head assembly portion and the suspension adapter portion, and the two pairs of the head assembly portion and the suspension adapter portion simultaneously inspect both surfaces of the magnetic disk. Item 7. The magnetic disk inspection device according to Item 5 or 6.   The gimbal of the head assembly portion is formed by bending a side on which the magnetic head is mounted with respect to a portion where the boss hole is formed, on a side opposite to a projection side of the boss hole. Item 8. The magnetic disk inspection device according to any one of Items 5 to 7.   The magnetic disk inspection apparatus according to claim 5, wherein the row bar of the suspension adapter portion is formed thinner than a thickness of the magnetic head mounted on the head assembly portion.

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