JPH0770181B2 - Assembly device for disk device and head assembly - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device and a head assembly assembling device, and more particularly to a disk device and a head assembly for use in the disk device, wherein a pair of upper and lower heads are respectively moved up and down. While mounting on the base of
The present invention relates to an assembling apparatus for assembling an integrated head assembly by fastening upper and lower bases with screws.

[Outline of Invention]

The present invention relates to a disk device for performing writing or reading on a magnetic disk which can use both sides, and an assembly device for a head assembly used in the disk device. The invention relates to a head alignment adjustment and a screw tightening. The present invention relates to a head assembly assembling apparatus which is provided with a clamp arm for minimizing the amount of displacement between the upper and lower heads and is incorporated together with a secondary platen for assembly.

[Conventional technology]

When signals are written or read using a magnetic disk having magnetic layers formed on both sides, a head assembly having a pair of upper and lower heads respectively contacting the upper and lower surfaces of the magnetic disk is used. The upper and lower heads are supported by the upper and lower bases, respectively, and these bases are joined together to form a head assembly.

[Problems to be solved by the invention]

In the case of assembling such a head, the magnetic heads 3 and 4 are respectively attached to the upper and lower bases 1 and 2 as shown in FIG.
In addition to mounting, the operator manually sets it on the alignment machine and manually tightens the screw 7 using an electric screwdriver. That is, conventionally, the operator has tightened the screw 7 as if it were a hand.
Therefore, if the tightening force is not appropriate,
As shown in the figure, there is a problem that the upper and lower bases 1 and 2 are displaced from each other after tightening, which deteriorates the quality of the head assembly.

Further, as shown in FIG. 8, when the lower base 2 is provided with arms 5 extending laterally, and the lower base 2 is fixed by a guide rod 6 penetrating these arms 5, Had a problem that the lower base 2 was deformed by the tightening force, and the relative positions of the upper and lower heads 3 and 4 were displaced. Such deformation was likely to occur when the bases 1 and 2 were molded with a glass epoxy resin having low strength.

The present invention has been made in view of the above problems, and provides an assembling apparatus for assembling a head assembly in which the relative positions of the upper and lower heads are correctly held, which is excellent in accuracy and whose quality is stable. The purpose is.

[Means for solving problems]

A first invention is a disk device having upper and lower heads for writing and reading signals to and from the upper and lower surfaces of a disk, and an upper base and a lower base to which the upper and lower heads are attached respectively at their tip portions. A support portion provided on at least one base end side of the upper base or the lower base and coupled to the other base end portion, and a surface opposite to the head mounting surface of the lower base. And a clamped portion which is provided in the vicinity of the head mounted on the lower base and is clamped by a clamper that fixes the lower base when the upper base is mounted on the lower base. It relates to the device.

In a second aspect of the invention, the upper head mounted on the upper base is set to a predetermined positional relationship with respect to the lower head mounted on the lower base, and the lower base and the upper head are mounted. In a head assembly assembling apparatus for assembling an integrated head assembly by tightening a base with a screw, a surface of the lower base opposite to a surface on which the lower head is mounted is The present invention relates to a device for assembling a head assembly, wherein a clamp arm that holds a rib formed near the head on the side is provided.

[Action]

According to the first aspect of the present invention, the upper base is attached to the lower base in a state where the lower base is fixed by the clamper via the held portion, and the support portion provided at one base end portion is provided at the other end. Signals are written to or read from the upper and lower surfaces of the disk by using head assemblies formed by combining with the base end and using the upper and lower heads of these head assemblies.

According to the second aspect of the invention, it is formed on a surface of the lower base on which the lower head is mounted, the surface being opposite to the surface on which the head is mounted and in the vicinity of the lower head. The lower base is properly positioned with the ribs being clamped by the clamp arms, and the upper base is clamped and fixed to the lower base.

〔Example〕

1 to 3 show a head assembly assembled by an apparatus according to an embodiment of the present invention, and the head assembly includes a pair of upper and lower bases 11 and 12. The upper and lower magnetic heads 13 and 14 are mounted by these bases 11 and 12, respectively. Arms 15 and 16 are extended to the side of the lower base 12, and a guide rod 17 is provided so as to insert these arms 15 and 16. A support portion 18 is provided at the rear end of the lower base 12, and a coupling plate 19 is embedded in the support portion 18. A female screw hole 21 is formed in the coupling plate 19 so as to face the notch 20 of the support portion 18.

On the other hand, a leaf spring 23 is attached to the rear end side of the base 11 that supports the upper head 13. The leaf spring 23 is provided with a rectangular opening 24 for inserting a screw,
Extension portions 25 are formed on both sides. The extending portion 25 is cut along a cutting portion 26 shown by a chain line after assembling. A holding plate 27 is attached from the upper side of the leaf spring 23, and is connected to the lower base 12 by a screw 28. The screw 28 is inserted through the notch 20 and the connecting plate 19
It is adapted to be screwed into the female screw hole 21 of.

Next, the overall structure of the assembling apparatus for assembling the above head assembly will be described with reference to FIG. 4. This apparatus includes a head assembly supply unit 31, and the platen 32 of this unit 31 causes the upper and lower bases 11, 12
A head assembly consisting of
A power supply connector 33 is provided on a side portion of the supply unit 31, and a test is conducted by energizing at the time of assembling or after assembling. The apparatus also includes a disk supply unit 34, and the unit 34 supplies a magnetic disk for testing. A reference pin clamp device 35 is provided on the side of the disc supply unit 34.

An alignment device 36 is provided at a position facing the magnetic disk supply unit 34. This device has a table 37, and a pair of left and right clamp arms 38 is provided on the table 37. Further pair of arms
A clamp head 39 is arranged between 38, and a pusher 40 is provided at the tip thereof. A receiver 41 (see FIG. 6) is provided on the table 37 so as to face the presser 40. Furthermore, the assembly device has a drive for the bit 42 for tightening the screw 28.

Next, an outline of the assembly of the head assembly by this apparatus will be described. The head assembly is placed on the platen 32, the head assembly is supplied by the supply unit 31, and the test magnetic disk 43 (see FIGS. 5 and 6) is supplied from the direction perpendicular to the supply direction of the head assembly. Supplied by 34. Then, the magnetic disk 43 is moved with respect to the lower base 12 while rotating the magnetic disk 43. With this, the position where the lower magnetic head 14 just tracks is searched. At the position where the lower magnetic head 14 correctly tracks, the magnetic disk 43
When is moved, the magnetic disk 43 is fixed by the magnetic disk supply unit 34.

When the test disk 43 is fixed in the correct position in this manner, the upper base 11 is moved by the alignment device 36 in the X-axis direction, the Y-axis direction, and the θ-direction, and then the upper magnetic head 13 is used. Test disc
Play 43. When the upper magnetic head 13 detects a predetermined signal of the test disk 43, the screw 28 is tightened by the bit 42 at that position to fix the upper base 11 to the lower base 12. The above-mentioned series of operations is completely automated by the apparatus shown in FIG.

Particularly, in this device, as shown in FIG. 5, a pair of left and right clampers 38 are placed on the table 37 of the alignment device 36.
Are provided, and the clampers 38 move forward in an open state to chuck the extension portions 25 on both sides of the leaf spring 23 of the upper base 11. The clamper 38 clamps the upper base 11 via the leaf spring 23, so that the clamper 38 is clamped at the X position,
Even if the chuck positions in the Y-axis and Z-axis directions vary a little due to the precision of the mold of the base 11 and the adjustment error of the machine, it is possible to sufficiently follow the chuck position. Therefore, even if the table 37 is aligned in the X-axis, Y-axis, and θ directions in such a state, the head chips 13 and 14 and the magnetic disk for test 43 are not damaged, and a simple method is used. It is possible to align the base 11 corresponding to.

After adjusting the alignment, the screws 28 are fastened as described above, but the fastening force at this time causes the upper and lower bases 11,
Clamp arm when tightening so that 12 do not shift from each other
38, the upper and lower bases 11 and 12 are clamped and fixed to each other by the pusher 40 at the tip end as shown in FIGS. 6 and 2. In such a state, the bit 42 is pressed from above. Is lowered and the screw 28 is tightened. Therefore, depending on the tightening force, the upper and lower
Rotation of 11 and 12 is prevented and upper and lower bases 11 and 12 are prevented.
The deviation can be prevented.

Further, at the time of this tightening, in order to prevent the lower base 12 from being deformed, as shown in FIG. 1, the rib 45 formed on the lower surface of the base 12 is received with the clamp arm 46.
I am trying to sandwich it with 47. Since the position clamped by the arm 46 is near the position where the lower base 14 is mounted, the position of the magnetic head 14 can be held correctly. Further arm 46 and receiver 47
Since the ribs 45 are sandwiched by and, even if the base 12 is molded with a resin having a low strength such as glass epoxy resin, the lower base 12 is not deformed, and high accuracy is achieved. You can guarantee.

〔The invention's effect〕

As described above, according to the present invention, the rib formed on the surface of the lower base in the vicinity of the head and on the side opposite to the head mounting surface is clamped by the clamp arm, and the rib is used by the clamp arm. The present invention relates to a disk device using a head assembly that is integrated by fixing upper and lower bases with screws and a device for assembling the head assembly.

Therefore, it is possible to reliably prevent the upper and lower heads from being displaced from each other due to the deformation of the lower base, and to assemble the upper and lower heads with high accuracy. Further, according to the disk device in which signals are written or read on the upper and lower surfaces of the disk using such a head assembly, it is possible to write or read signals with high accuracy.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an essential part showing a clamp operation of a lower base in a head assembly assembling apparatus according to an embodiment of the present invention, and FIG. 2 is an essential part showing a clamp operation of upper and lower bases when tightening a screw. FIG. 3 is a cross-sectional view, FIG. 3 is an exploded perspective view showing the assembly of the head assembly, FIG. 4 is a perspective view showing the overall structure of the assembling apparatus, FIG. FIG. 7 is a perspective view showing a main part of the operation of the clamp, FIG. 7 is a plan view showing a shift of upper and lower bases in conventional assembly, and FIG. 8 is a plan view showing a deformation of the lower base. In the reference numerals used in the drawings, 11 ... Base (top) 12 ... Base (bottom) 13 ... Magnetic head (top) 14 ... Magnetic head (bottom) 28 ... Screw 45 ... Rib 46 ... Clamp Arm 47 ... The receiver.

Claims (4)

[Claims] 1. A disk device having upper and lower heads for writing and reading signals to and from the upper and lower surfaces of the disk, and an upper base and a lower base to which the upper and lower heads are attached, respectively. A surface provided on the base end side of at least one of the upper base and the lower base and connected to the other base end, and a surface opposite to the head mounting surface of the lower base. A disk device, which is provided in the vicinity of the mounted head, and has a clamped portion that is clamped by a clamper that fixes the lower base when the upper base is mounted to the lower base. . 2. A spring member extending laterally is provided on the base end side of the upper base, and the extending portion is held by a clamper for fixing the upper base. The disk device according to claim 1. 3. The lower base and the upper base are set so that the upper head mounted on the upper base has a predetermined positional relationship with the lower head mounted on the lower base. In a head assembly assembling apparatus for assembling an integrated head assembly by tightening and with a screw, a surface opposite to a surface on which the lower head of the lower base is mounted, A head assembly assembling apparatus, characterized in that a clamp arm for sandwiching a rib formed near the head is provided. 4. A pressure clamp device is provided to clamp and fix the upper base and the lower base at their joints in a state where the upper base is positioned with respect to the lower base. 4. The head assembly assembling apparatus according to claim 3, wherein the screw is tightened while being clamped and fixed by the pressure clamp device.