JPH0636486Y2 - Head mounting mechanism for hard disk inspection equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a hard disk inspection device for inspecting a hard disk for defects.

[Conventional technology]

Recently, a fixed magnetic disk device for writing / reading information has been developed. Therefore, a hard disk inspection device for inspecting whether or not the hard disk used in this fixed magnetic disk device has a defect has been developed. Hard disk inspection equipment is 0.3μm from the surface of the hard disk rotated by the spindle motor.
A magnetic head that has been levitated to some extent tests whether this hard disk is defective. This magnetic head is supported by a head plate via a head arm.

As such a hard disk inspection device, for example, the fifth
There is something like the one shown in the figure. A head plate 101 that supports a magnetic head (not shown) is fixed by a pair of holding and fixing members 103 and 104 provided on a base 102. The sandwiching and fixing members 103, 104 have V-shaped concave surfaces opposed to each other, and the screwing member 105 is rotated to rotate the sandwiching and fixing members 103, 104.
At 04, the head plate 101 having a substantially rectangular cross section is sandwiched and fixed at a predetermined position.

By the way, the magnetic head floats about 0.3 μm from the hard disk and follows the hard disk to detect a defect. However, if the magnetic head is not in a very precise predetermined position with respect to the hard disk, the defect is detected even if there is a defect. Can not. Therefore, the head plate 101 supporting the magnetic head needs to be fixed to the base 102 with high accuracy.

On the other hand, there is a head mounting mechanism of a hard disk inspection device as shown in FIG. In this hard disk inspection apparatus, a contact portion 112 is integrally formed on a base 111, and a head plate 113 placed on a reference surface 111a of the base 111 is pressed against an inclined surface 112a of the contact portion 112 by a screw member 114. Fixed in place.

[Problems to be solved by the device]

However, in the former case of the head mounting mechanism of such a conventional hard disk inspection apparatus, the head plate
If a slight error occurs in the thickness of 101 or the V-shaped concave portions of the holding and fixing members 103, 104, the magnetic head is in a direction parallel to the surface of the hard disk (X direction in FIG. 5).
Or, the deviation occurs in the direction perpendicular to the plane (Y direction in FIG. 5). Therefore, it is necessary to increase the thickness of the head plate 101 and the processing accuracy of the V-shaped concave portions of the holding and fixing members 103 and 104, which causes a problem that the cost of the entire apparatus increases.

Further, in the latter part of the head mounting mechanism of the conventional hard disk inspection device, since the base 111 is provided with the reference surface 111a, the bottom surface B of the head plate 113 has the magnetic head perpendicular to the surface of the hard disk. It can be fixed with high accuracy in this direction (Y direction in FIG. 6). However, since the head plate 113 determines the accuracy of the magnetic head in the direction parallel to the surface of the hard disk (X direction in FIG. 6) by the inclined surface 112a formed on the abutting portion 112, the head plate 113 is also the head. Plate 113
However, there is a problem in that the cost of the entire apparatus becomes high because it is necessary to increase the thickness and processing accuracy of the inclined surface 112a.

Therefore, the head mounting mechanism of the hard disk inspection device,
It is conceivable to adopt a configuration as shown in FIG. That is, the base 121 is provided with the reference surface 121a and the reference pin 122, and the reference plate 121a and the reference pin 122 are provided on the head plate 1.
When the bottom surface B of 23 and the left side surface A are aligned, the magnetic head is positioned with high accuracy in a direction parallel to the surface of the hard disk and a direction perpendicular to the surface (X direction and Y direction in FIG. 7, respectively). can do.
However, since the head plate 123 is fixed by being tightened with the bolts 124, the position may shift when fixing. Further, the magnetic head has a relatively short life, so it needs to be replaced, and depending on the size of the hard disk, the magnetic head needs to be replaced accordingly. At this time, there is a problem that it is troublesome to both loosen and tighten the bolt 124.

[Means for Solving the Problems]

In order to solve such a problem, in this invention,
A magnetic head for detecting defects in the hard disk,
A head plate that supports the magnetic head, a base for positioning the head plate in a direction perpendicular to the surface of the hard disk, and a positioning of the head plate in a direction parallel to the surface of the hard disk. And an abutting portion for performing the pressing, and at least two or more positions on the upper surface of the head plate for pressing the head plate against the base and the abutting portion so that the head plate is automatically fixed at a predetermined position. A pressing member, a plurality of biasing members that apply a biasing force that presses the head plate to the base and the contact portion, and a biasing force that is applied to the pressing member by the biasing member. The attaching / detaching means for releasing by this force is provided.

[Action]

When the head plate is pressed by the pressing force of the pressing means by the pressing member, this can be easily fixed to the base and the contact portion with high accuracy. At this time, the head plate is accurately positioned by its bottom surface and side surfaces, and only these two surfaces need to be precisely machined. At that time, it is relatively easy to obtain machining accuracy, so the cost of the entire apparatus is reduced. Can be reduced.

〔Example〕

The present invention will be described below with reference to the drawings. 1 to 3 are views showing an embodiment of a head mounting mechanism of a hard disk inspection device according to the present invention.

In FIG. 1, reference numeral 1 denotes a support base of this apparatus, a spindle motor 2 is provided on the support base 1, and a hard disk 3 (magnetic disk) is rotatably mounted on the spindle motor 2. On the hard disk 3, a magnetic head 4 for inspecting whether or not the hard disk 3 has a defect is arranged facing the hard disk 3 with a flying height of about 0.3 μm.

The magnetic head 4 is supported by a plate-shaped head plate 6 via an arm 5, and the head plate 6 is mounted on a base 7 provided on the support 1. That is, as shown in FIG. 2, the head plate 6 having a substantially rectangular cross section is placed on the reference surface 7 a of the base 7. Also,
A reference pin 8 as an abutting portion is planted on the reference surface 7a of the base 7, and the head plate 6 also abuts on the reference pin 8.

Support columns 9 are provided on the bases 7 on both sides of the head plate 6, respectively.
Two of them are planted, and the support pillar 9 is provided with a holding member 10 made of synthetic resin and having a substantially U shape as a whole. That is, mounting holes 11 are formed on both sides of the pressing member 10, and the support columns 9 are loosely fitted in the mounting holes 11. A compression spring 12 is provided between the head 9a of the support column 9 and the pressing member 10.
The (biasing means) is contracted, and the compression spring 12 presses the head plate 6 toward the reference surface 7a via the pressing member 10 by the biasing force.

An inclined surface 10a is formed on one side (right side in FIG. 2) of the pressing member 10 on the side of the head plate 6, and on one side of the pressing member 10, a base 7 is provided, and a lever having a hook shape as a whole. 13
A (push-up means) is attached so as to be rotatable around the pin 14. A roller 15 is attached to the pressing member 10 side of the lever 13, and the roller 15 can come into contact with the lower surface of the pressing member 10. A fulcrum pin 16 is planted on the base 7 on the other side (left side in FIG. 2) of the head plate 6, and the fulcrum pin 16 can contact the lower surface of the pressing member 10.

The head plate 6 is placed on the reference surface 7a and is in contact with the reference pin 8. The bottom surface B of the head plate 6 is pressed against the reference surface 7a by the urging force of the compression spring 12 and is in close contact therewith. Further, the left side surface A of the head plate 6 is pressed against the reference pin 8 by the pressure component of the inclined surface 10a and is in close contact therewith. In this way, the head plate 6 has its left side surface A and bottom surface B in a direction parallel to the surface of the hard disk (X direction in FIG. 2) or in a direction perpendicular to the surface (Y direction in FIG. 2). The magnetic head is accurately positioned at a predetermined position. Therefore, it is possible to reliably inspect whether or not the hard disk is defective by the magnetic head.

Here, since the head plate 6 is accurately positioned by the bottom surface B and the left side surface A, only these two surfaces need to be precision machined, and the machining accuracy at that time can be relatively easily achieved. Therefore, the cost of the entire device can be reduced. Since the pressing member 10 has flexibility, it does not rattle when the head plate 6 is pressed by the pressing member 10 and fixed to the base 7.

Next, when the grip portion 13a of the lever 13 is rotated in the direction of the arrow in FIG. 2, the roller 15 tries to push up one end of the pressing member 10 upward against the biasing force of the compression spring 12. At this time, the other end of the pressing member 10 comes into contact with the fulcrum pin 16 and rotates around the fulcrum pin 16 so that the one end of the pressing member 10 moves to the third position.
It is pushed up as shown. When the pressing member 10 is pushed up in this way, the head plate 6
Is no longer pressed by the pressing member 10, and can be easily removed from the base 7.

Therefore, when the life of the magnetic head has expired or the size of the hard disk has changed, the head plate 6 to which the magnetic head is attached can be easily replaced. Next, if the grip 13a of the lever 13 is returned to its original position, the head plate 6 supporting a new magnetic head can be easily fixed to the base 7 with high precision. Therefore, the replacement of the magnetic head can be performed quickly and easily.

Next, FIG. 4 shows another embodiment of the head mounting mechanism of the hard disk inspection apparatus according to the present invention. In this embodiment, a recess is formed in the base 21 to form a reference surface 21a, and a step portion 21b formed between the reference surface 21a and the upper surface of the base 21 is used as an abutting portion. . With such an embodiment, the same effect as the above embodiment can be obtained.

Instead of providing the lever 13 (pushing means) as in the above-described embodiment, the operator may directly push up one end of the pressing member 10 with his / her own hand.

[Effect of device]

As described above, according to the present invention, when the pressing member presses the head plate by the urging force of the urging means, the head plate can be easily fixed to the base and the contact portion with high accuracy, The head plate can be accurately positioned and fixed in the direction parallel to the surface of the hard disk and in the direction perpendicular to the surface.

At this time, the head plate is accurately positioned by its bottom surface and side surfaces, and only these two surfaces need to be precisely machined. At that time, it is relatively easy to obtain machining accuracy, so the cost of the entire apparatus is reduced. Can be reduced.

Next, when the pressing member is pushed up against the biasing force of the compression spring, the head plate can be easily removed from the base and the contact portion. Therefore, the magnetic head can be replaced quickly and easily.

[Brief description of drawings]

1 to 3 are views showing an embodiment of a head mounting mechanism of a hard disk inspection apparatus according to the present invention. FIG. 1 is an overall perspective view thereof, and FIG. 2 is II-II in FIG.
FIG. 3 is a sectional view showing the movement of the pressing member, and FIG. 4 is a sectional view showing another embodiment of the head mounting mechanism of this hard disk inspection apparatus. 5 and 6 are sectional views showing a head mounting mechanism of a conventional hard disk inspection apparatus, and FIG. 7 is a sectional view showing a head mounting mechanism of a hard disk inspection apparatus which is considered different from the conventional example. 1 ... Support base 2 ... Spindle motor 3 ... Hard disk (magnetic disk) 4 ... Magnetic head 5 ... Arm 6 ... Head plate 7,21 ... Base 7a, 21a ... Reference plane 8 ... Reference Pin (abutting part) 9 …… Supporting column 9a …… Head 10 …… Pressing member 10a …… Sloping surface 11 …… Mounting hole 12 …… Compression spring (biasing means) 13 …… Lever 13a …… Grip part 14 …… pin 15 …… roller 16 …… fulcrum pin 21b …… step part (contact part)

Claims (1)

[Scope of utility model registration request] 1. A magnetic head for detecting a defect of a hard disk, a head plate for supporting the magnetic head, a base for positioning the head plate in a direction perpendicular to a surface of the hard disk, and a base for this. An abutting portion provided on a base for positioning the head plate in a direction parallel to a surface of the hard disk, and the base and the abutting portion so that the head plate is automatically fixed at a predetermined position. A pressing member that presses at least two or more locations on the upper surface of the head plate in order to press the head plate against the head plate; and a plurality of pressing forces that apply a pressing force to the pressing member to press the head plate against the base and the contact portion. A member and an attaching / detaching means for releasing the urging force applied to the pressing member by the urging member by the leverage. A head mounting mechanism for a hard disk inspection device, which is characterized by comprising: