JPH0319059Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a magnetic head adjustment mechanism in a magnetic disk drive device using a flexible magnetic disk called a floppy disk. In particular, the magnetic head in a magnetic disk drive device is capable of adjusting the magnetic head so that the magnetic head reliably contacts the magnetic disk when writing or reading with the magnetic head in contact with the magnetic disk. This relates to an adjustment mechanism.

[Prior art]

In general, in magnetic disk drives such as floppy disk drives, it is essential to ensure contact between the magnetic head and the magnetic disk, and the miniaturization, high density, and high speed rotation of the magnetic disk is essential. As a result, it is increasingly desired to improve the reliability of the contact described above.

For this reason, for example, in devices that use small, high-density magnetic disks with a diameter of about 2 inches, such as floppy disks for electronic still cameras, and that rotate at high speed, Adjust the magnetic head in the height direction, lateral direction (horizontal direction perpendicular to the seek direction), height tilt in the direction perpendicular to the seek direction, height tilt in the seek direction (folding of the head in the seek direction), and azimuth adjustment. , it is necessary to ensure optimal contact of the magnetic head with the magnetic disk.

However, with conventional magnetic head adjustment mechanisms, when adjustments are made in any of the above directions, other adjustments are likely to be affected, making it extremely difficult to maintain the optimal adjustment state. The disadvantage was that it was difficult to

In particular, adjustments to the height and inclination in the height direction were made from the head carriage to the magnetic head support member, and as these factors interacted with each other, the adjustment was extremely delicate, requiring retries, and was time consuming. It was such a complicated thing.

[Purpose of invention]

This invention eliminates the drawbacks of the conventional devices as described above, and improves the height of the magnetic head, the height of the seek, and the height in the direction orthogonal to the seek in order to ensure the contact of the magnetic head with the magnetic disk, that is, the head touch. An object of the present invention is to provide an adjustment mechanism for a magnetic head in a magnetic disk drive device, which can adjust the inclination of a magnetic head independently without affecting other adjustments.

[Summary of the idea]

In a magnetic disk drive device using a rotating magnetic recording medium, this invention provides a pedestal via a pedestal shaft in a hole drilled in a head carriage, and allows both ends of the pedestal shaft to be vertically retracted from the head carriage. A swinging pedestal is provided on the pedestal shaft, and a second adjusting screw is provided on the lower surface of the pedestal so as to be able to extend and retract from the pedestal in any vertical direction. The swinging pedestal can be held in any swinging state, and by providing a magnetic head on the top surface of the swinging pedestal, the magnetic head can be moved in the height direction. and the inclination of the height in the direction orthogonal to the seek direction can be adjusted with the first adjustment screw, the inclination of the height in the seek direction can be adjusted with the second adjustment screw, and the adjustments in each direction affect each other. The outline is that it can be adjusted independently without any trouble.

[Example of idea]

Embodiments of this invention shown in the drawings will be described below.

The drawing shows an adjustment mechanism for a magnetic head according to this invention, and numeral 1 denotes a head carriage, which has a rectangular hole 1a.
are provided, and square grooves 1b and 1c are provided in the center portion of the upper surface in the transverse direction, respectively.

First adjusting screws 2a, 2b which are screwed into the head carriage 1 and movable in the vertical direction can be retracted into the square grooves 1b, 1c, and a pedestal shaft is provided in the one square groove 1b. 3 prismatic part 3
a is located in the other square groove 1c, and a support portion 3b provided at the end of the pedestal shaft 3 is located, so that the pedestal shaft 3 is installed in the hole 1a of the head carriage 1. and,
Both ends are supported by the upper ends of the first adjustment screws 2a, 2b.

The pedestal shaft 3 is provided with a pedestal 4 having a size that has a small gap with the hole 1a of the head carriage 1, and a swing pedestal 5 located inside the pedestal 4.

That is, both side upright parts 4a and 4b of the pedestal 4
The pedestal shaft 3 passes through the pedestal shaft 3, and the swing pedestal 5 is located inside the pedestal 4.
The pedestal shaft 3 passes through both side hanging parts 5a and 5b, so that it can swing relative to the pedestal 4 about the pedestal shaft 3.

and 1 of the holes 1a of the head carriage 1.
A pressure spring 6 is located between the inner side of the pedestal 4 and the one side upright portion 4a of the pedestal 4 in a state where it is wound around the pedestal shaft 3. A pressure spring 7 is provided between the pedestal 4 and the one side upright portion 4a, with the pedestal shaft 3 wound around it, and an adjustment nut 8 is screwed into the threaded shaft portion 3c of the pedestal shaft 3. With this adjustment nut 8, the swing base 5 can be moved on the base shaft 3 by or against the pressure spring 7, and can be stopped at any position. Furthermore, the pedestal 4 is biased in one direction by the pressing spring 6.

Further, the pedestal 4 is provided with adjustment screws 9a, 9b which are screwed onto the pedestal 4 and movable in the vertical direction. The swinging state of the swinging base 5 relative to the base 4 about the base shaft 3 can be adjusted by the protruding and retracting states of both adjusting screws 9a and 9b.

A rotation center is defined on the upper part of the swing base 5 by a pin 10 protruding therefrom, and a washer 12 is disposed in an annular groove 11 bored around the pin 10. The rotating pedestal 14 is biased upward by the rotary pedestal 14 and is further restricted from moving upward by the rotating pedestal presser 13.
A pin 1 is provided on the top surface of this rotating base 14.
A head mounting base 16 is provided with a head mounting base 16, and a head chip 1 is mounted on the upper end of the vertical portion 16a of the head mounting base 16 via a spacer 17.
A head mounting plate 19 is mounted.

The head mounting base 16 has an arm portion 16b.
are integrally provided, and this arm portion 16b
An eccentric pin 22 bored on the upper surface of the adjustment shaft 21 passing through the head carriage 1 is located in a long hole 20 bored at the end of the head carriage 1, and when the adjustment shaft 21 rotates, the eccentric pin 22 By the action of the pin 22 and the elongated hole 20 of the arm portion 16b of the head mount 16, the head mount 16 can swing together with the rotary pedestal 14 in the horizontal direction (azimuth adjustment direction). There is.

Note that 23 is a presser spring plate that holds both ends of the base shaft 3 from protruding from the top surface of the head carriage 1, 24 is a mounting screw for this presser spring plate 23, and 4C is a screw for rotating the adjustment nut 8. The adjustment hole 25 bored in the pedestal 4 for this purpose is a magnetic recording medium.

Next, the operation of the above will be explained.

In the following explanation, adjustment of the seek direction of the magnetic head will not be described, but this is done when the head carriage 1 is attached to the main body of the magnetic disk drive, and the adjustment in this direction is completed at that point.

First, when adjusting the height of the magnetic head, adjustment screws 2a and 2b are used.

That is, if the adjusting screws 2a, 2b located on the lower surface of the head carriage 1 are rotated from the rear end, the tips of the adjusting screws 2a, 2b will be in the square grooves 1b,
1c, and since the ends of the pedestal shaft 3 are supported on the upper surfaces of both adjustment screws 2a and 2b, both adjustments can be made by swinging both adjustment screws 2a and 2b in the up and down direction. By always keeping the upper ends of the screws 2a and 2b at the same height level, the pedestal 4, the swinging pedestal 5, and the rotating pedestal 14 can be adjusted vertically via the pedestal shaft 3. Furthermore, the rotating pedestal 14 has a head attached to it. Since a magnetic head consisting of a head chip 18 and a head mounting plate 19 is provided via a stand 16, the height of the magnetic head can be adjusted.

In addition, when adjusting the inclination of the height of the magnetic head in the direction orthogonal to the seek, both the adjusting screws 2a,
By changing the protruding states of the magnetic heads 2b to be different from each other, the pedestal shaft 3 is tilted in the vertical direction, so that the height of the magnetic head in the direction perpendicular to the seek direction can be adjusted.

Next, the horizontal direction (horizontal direction perpendicular to the seek)
When adjusting, the adjustment nut 8 screwed onto the threaded shaft 3c of the pedestal shaft 3 is rotated using the adjustment hole 4c provided in the head carriage 1, and the swing pedestal 5 is rotated. It moves along the pedestal shaft 3 by the action of the pressure spring 7 and stops at an arbitrary position, so that the rotary pedestal 14 attached to the upper part of the swing pedestal 5 is moved together with the rotating pedestal 5 to the side of the magnetic head. During this movement, the eccentric pin 22 is located in the elongated hole 20 of the arm portion 16b of the head mount 16, but the swing pedestal 5 and the rotating pedestal The head mounting base 16, which moves together with the head mounting base 14, has an eccentric pin 22 because the longitudinal direction of the elongated hole 20 formed in the arm portion 16b coincides with the moving direction.
There is no risk that the lateral movement of the magnetic head will be hindered by this.

In addition, when adjusting the inclination of the height of the magnetic head in the seek direction (folding down of the head in the seek direction), the rear end protrudes from the lower surface of the pedestal 4,
This is done using two adjustment screws 9a and 9b whose upper ends protrude from the upper surface of the pedestal 4 and are in contact with two opposing corners of the lower surface of the swing pedestal 5.

That is, by protruding the upper end of one adjusting screw 9a and retracting the upper end of the other adjusting screw 9b, the swing base 5 swings around the base shaft 3, so that the tilt in the rotation direction, that is, The magnetic head can be tilted in the direction of arrow A in FIG. 3 to perform arbitrary adjustments.

Further, when adjusting the azimuth of the magnetic head, the rear end portion of the adjustment shaft 21 passing through the head carriage 1 is operated, and the arm portion 16b of the head mounting base 16, which is protruding from the upper surface of the adjustment shaft 21, is operated.
By rotating the eccentric pin 22 located in the elongated hole 20, the arm portion 16b is
The head mounting base 16
is a rotating base 1 that is integrated through a pin 15.
4, it is possible to adjust the azimuth of the magnetic head.

Incidentally, if all adjustments are made from the bottom surface of the head carriage 1 as in the embodiment, the workability of the adjustment is extremely good.

[Effect of idea]

By configuring this idea as described above,
Since the inclination adjustment in the two directions of height and height direction does not affect the other adjustments, it has an excellent effect that the adjustment in each direction can be performed independently and reliably.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, with FIG. 1 being a schematic longitudinal sectional front view, FIG. 2 being a partially omitted schematic plan view, and FIG. 3 being a schematic longitudinal sectional side view. 1...Head carriage, 2a, 2b, 9a,
9b...adjustment screw, 3...pedestal shaft, 4...
Pedestal, 5... Swinging pedestal, 6, 7... Pressing spring, 8
...Adjusting nut, 10, 15...Pin, 13...
Rotating table holder, 14... Rotating base, 16... Head mounting base, 17... Spacer, 18... Head chip, 19... Head mounting plate, 20... Long hole,
21...adjustment shaft, 22...eccentric pin, 25...magnetic recording medium.

Claims (1)

[Scope of utility model registration request] In a magnetic disk drive device using a rotary magnetic recording medium, a head carriage movable in a seek direction is provided with a first adjustment screw that can be adjusted in the vertical direction at a predetermined interval, and A pedestal shaft passing through the pedestal and the swinging pedestal is supported between the upper ends of the screw in a horizontal direction perpendicular to the seek direction, and a magnetic head is disposed on the top of the swinging pedestal, and the pedestal shaft A second adjustment screw is disposed on the oscillation pedestal to set the oscillation pedestal in an arbitrary oscillation state about the pedestal shaft, and the first adjustment screw adjusts the height of the magnetic head and the height in the direction orthogonal to the seek direction. 1. An adjustment mechanism for a magnetic head in a magnetic disk drive device, characterized in that the inclination of the height of the magnetic head in the seek direction can be adjusted by the second adjusting screw.