JPS628382A - Head device - Google Patents

Abstract

PURPOSE:To obtain the head position which is excellent in workability and productivity and high in accuracy by constructing to provide the transparent hole, in which the screw for fixing the screw, at the supporting body side and constructing to provide the screw hole with the tap at the supported body side. CONSTITUTION:A screw hole 7a' with a tap is provided at an arm adjusting part 7 side, a hole 3a' having the diameter a little larger than the diameter of a screw 6 is provided at a carriage 3 side, and head parts 10 and 20 of the 0 surface and the 1 surface are tightened from the carriage 3 side by the screw 6. Thus, since a head part 6a of the screw 6 gives the most rotating moment to the carriage 3 side fixed by guide bar holes 3c and 3d, the deviation of the alignment can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a head device, and particularly to a head device for positioning and supporting a recording/reproducing head of an optical disk, a magnetic disk, or the like.

[Prior Art] Conventionally, there has been known an apparatus that rotates a recording medium such as a magnetic disk or an optical disk and records and reproduces information using a recording and reproducing head of a predetermined method.

For example, a support mechanism for a magnetic head that performs magnetic recording and reproduction on both sides of a floppy disk was constructed as shown in FIG.

In the figure, what is designated by the reference numeral 3 is called a carriage, which is made of plastic or the like, and has guide bar holes 3c, 3d and grooves 3e on both side edges. It is slidably provided on a bar, and is driven and travels by a drive means (not shown) to transport the entire magnetic head device in the direction of arrow Y.

A convex portion 3f having a screw hole 3a is formed at the rear end of the upper surface of the carriage 3, and a magnetic head 1' for recording and reproducing information on the lower surface (0 side) of a floppy disk (not shown) is formed at the tip. A comb plate 2 made of stainless steel or the like is fixed by IT adhesion or the like.

Reference numeral 10 indicates the structure of the magnetic head 1 to the carriage 3 described above.
, and here referred to as the O-plane head section, the one indicated by the reference numeral 4 is an arm made of plastic or the like, and on the lower surface of its tip, it is arranged opposite to the magnetic head 1 mentioned above, and the upper surface of the disk ( A magnetic head 1 that performs recording and reproduction on one side)
' is supported via a gimbal 2' similar to the cushion plate described above, with its recording/reproducing surface (not shown) facing downward.

An arm adjustment section indicated by reference numeral 7 is connected to the arm 4 via the plate spring 5.
It is connected to the rear end surface of the. This arm adjustment part 7 is integrally formed with the arm 4 by insert molding the leaf spring 5, and has a cutout part 7d in the center of its upper surface.
is formed.

Then, a fixing screw 6 is inserted into the approximate center of the arm 4 side of the notch 7d of the arm adjustment section 7, and a hole 7a corresponding to the screw hole 3a of the zero-plane head section 10 passes through the hole 7a vertically. It is formed.

In addition, at both ends of the arm adjustment portion 7, which faces the arm 4 side portion across the notch portion 7d, coupling bins for a position adjustment jig (not shown) are provided for positioning, which will be described later. Hole 7b for insertion.

7C is formed to penetrate vertically.

The component below the arm 4 is designated by the reference numeral 20 and is referred to as a one-sided head section herein.

Based on the above structure, the 0-plane head part 10 and the 1-plane head part 2 are
The assembly of 0 is performed as follows.

Mass, guide bar holes 3c, 3d and groove 3e of carriage 3
A guide bar (not shown) is inserted through the disc drive, the guide bar is fixed inside the disc drive, and the 0-plane head IO is assembled into the disc drive.

Next, the screw 6 is passed through the hole 7a of the arm adjustment section 7 of the one-plane head section 20, and the screw 6 is screwed into the screw hole 3a of the zero-plane head section 10 to temporarily fix the one-plane head section 20. In this case hole 7
Since the inner diameter of a is slightly larger than the outer diameter of the screw 6,
The one-sided head portion 20 is temporarily fixed with a play necessary for the positioning adjustment described below.

Subsequently, a coupling pin of a position adjustment jig (not shown) is inserted into the holes 7b and 7c of the arm adjustment section 7, and the jig is coupled to the one-sided head section 20.

Next, insert the aforementioned 7-line disk between the two magnetic disks 1 and 1', rotate it, and use the jig to rotate the one-sided head portion 20 using the screw 6 as a fulcrum as shown in FIG. Move in the Y and R directions to position the first-plane head section 20 based on the zero-plane head section lO, that is, the magnetic head 1'
Adjust the position of.

This position adjustment is performed by rotating an alignment disk, on which index, track, and azimuth signals corresponding to the X, Y, and R directions are recorded, between both magnetic heads. While observing the reproduced signals with an oscilloscope, the arm 4 is moved so that these reproduced signals have optimal values.

After the adjustment is completed, the screw 6 is strongly tightened and fixed with adhesive to fix the one-sided head portion 20, and then the bottle is removed from the holes 7b and 7c.

[Problem to be solved by the invention J] In the conventional method as described above, when the screw 6 is strongly tightened, the contact area with the one-sided head portion 20 is large, so the contact area between the head of the screw 6 and the one-sided head portion 20 is large. Frictional force is concentrated between the two. That is, when tightening, when the screw 6 is rotated in the direction R in FIG. 2, a large rotational moment is generated and the head of the screw 6 is rotated.

There was a problem in that the first head part 20 also shifted in the R direction due to the frictional force between the first head part 20 and the alignment that had been made. Therefore, conventional mechanisms often require readjustment, have poor productivity, and are difficult to achieve high recording and reproducing accuracy.

[Means for Solving the Problems 1] In order to solve the above problems, the present invention provides a head device having a structure in which a supported body on which a recording/reproducing head is attached is fixed by screws to a support body which is positioned and fixed in advance. [Function] A configuration is adopted in which a through hole through which a screw for screwing passes is provided on the support side and a screw hole with a tap is provided on the supported body side, and the screw fixation is performed from the support side. As shown in Figure 1, a tapped screw hole 7a'' is provided on the arm adjustment part 7 side, and a hole 3a' with a diameter slightly larger than the diameter of the screw 6 is provided on the carriage 3 side. Tighten the head portion 10.20 of the first surface.This causes the head 6a of the screw 6 to apply most of the rotational moment to the side of the carriage 3 fixed by the guide bar holes 3c and 3d. Madness is prevented.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

FIG. 1 is an exploded perspective view showing the configuration of a floppy disk device similar to that in FIG. 3 as an embodiment of the present invention. The configuration of FIG. 1 is almost the same as that of FIG. 3, and the same members are given the same reference numerals and detailed explanations thereof will be omitted.

In this embodiment, the fixing hole of the arm adjustment part on the side of the 1-plane head 20 is a tapped screw hole 7a', and the fixing hole of the convex part 3f of the carriage 3 of the 0-plane head 10 is larger than the diameter of the screw 6. The hole (through hole) 3a' has a slightly larger inner diameter.

In the above configuration, in order to assemble and adjust the guide bar (not shown), first insert the guide bar (not shown) into the guide bar holes 3c and 3d.
After positioning and fixing carriage 3 through hole 7, insert the jig into hole 7.
c, 7d and screw the screw 6 from the underside of the carriage 3 into the screw hole 7a' through the hole 3a' and temporarily fix it.

Now, insert the alignment disk 7 between the magnetic rods L and 1' and perform the same adjustment operation as described above. When the alignment is confirmed, tighten the screw 6 to perform the final fixation.
According to this embodiment, the head 6a of the screw 6 has a guide bar 3c,
Since most of the rotational moment due to the frictional force is applied to the side of the carriage 3 fixed by 3d, the arm adjustment part 7 is fixed in close contact with the carriage 3 without causing any positional deviation.

Therefore, the head can be reliably positioned with high precision without disturbing the once determined head position as in the conventional case. That is, since there is no need for readjustment, assembly can be performed easily and in a short time, and excellent effects such as maintaining high assembly accuracy upon completion can be obtained.

Although a head device for a floppy disk has been exemplified above, it goes without saying that the present invention is similarly applicable to optical disks and other head devices having a similar structure.

[Effect] As is clear from the above description, according to the present invention, in a head device having a structure in which a supported body having a recording/reproducing head provided on a pre-fixed support is fixed with screws, screws are attached to the support. The structure is such that the through hole through which the set screw passes is provided with a tapped screw hole on the side of the supported object, so that the head of the supported object is not tightened during head positioning, adjustment, and final fixing. It is possible to provide an excellent head device that does not move inadvertently due to rotational moment, has excellent workability and productivity, and also guarantees highly accurate head position.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a head device of the present invention, FIG. 2 is an exploded perspective view showing the structure of a conventional head device, and FIG. 3 is an explanatory diagram showing head position adjustment. 1.1'...Magnetic head 3...Carriage 3a'...Hole 7...Arm adjustment part 7a'
...screw hole

Claims (1)

[Claims] In a head device having a structure in which a supported body with a recording/reproducing head attached to a support that is positioned and fixed in advance is fixed with screws, a through hole through which a screw for screwing passes is provided on the support side, and a through hole is provided on the support body side, and a through hole is provided on the side of the supported body. A head device characterized in that a tapped screw hole is provided in the head device, and the head device is fixed with a screw from the support side.