JPS6020369A - Head carrying device - Google Patents

Abstract

PURPOSE:To adjust the position of a head with high precision by coupling a head carrying member with a head support, and providing an adjusting means which adjusts the radial relative position relation between them. CONSTITUTION:A magnetic disk 14 and a magnetic head 15 are provided, and the magnetic head 15 is mounted on the head support 16 and is guided by guide shafts 17a and 17b so that the head moves forth and back on the magnetic disk radially. The head carrying member 18 is guided by guide shafts 17a and 17b in a reciprocal moving state as well as the head support 16, and this head carrying member 18 is driven by a stepping motor 19, pulley 20, steel belt 21, and leaf spring 22 for the tension of the belt 21 as a head carrying driving means.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a head transfer device that can be used in a magnetic head of a floppy disk device or the like.

Conventional Structures and Problems In recent years, the use of magnetic disks, optical disks, and floppy disk devices that are compatible with low cost devices has been rapidly increasing as external storage devices for computers.

Conventionally, the means for transporting the magnetic head of the above-mentioned low-cost floppy disk drive mainly uses a step motor as the head transport drive means, and the rotational movement of the step motor is controlled by a steel belt or a lead screwdriver.

-Alternatively, the movement was converted into linear motion using a transmission means such as a cam. Such a conventional head transfer device will be explained using FIG. 1. 1 is a magnetic head for recording and reproducing information on a flexible magnetic disk 2, and is mounted on a head support 4 that is movable in the radial direction of the recording magnetic disk 2 along guide shafts 3a and 3b. has been done.

Reference numeral 5 denotes a thin stainless steel belt, one end of which is fixed to the side surface of one end of the head support 4 with a screw 6, and is connected to the rotating shaft 8 of the step motor 7 so as to be parallel to the guides @ 3a, 3b. It is wound around the press-fitted pulley 9 in an α-shape, and the middle portion is fixed to the outer peripheral surface of the pulley 9 with a screw 10. The other end of the steel belt 5 is connected to a plate spring 1 fixed to the other end surface of the head support 4.
1 and a constant tension is applied. The step motor 7 is attached to the substrate 12 with a screw 13 so as to be able to adjust its position in the circumferential direction, and the rotary shaft 8 rotates by a certain angle each time a drive pulse is input. Furthermore, since an excitation current is constantly flowing through the coil (not shown) of the step motor 7, the holding torque moves so that the current rotational position is maintained even when no drive pulse is applied. This rotational motion of the step motor 7 is converted into a linear motion via the pulley 9, steel belt 5, etc.
The magnetic head 1 is moved at regular intervals in the radial direction of the magnetic disk 2, and recording tracks are formed on the magnetic disk 2. Further, the magnetic head 1 is moved to an arbitrary recording track and held at track position A'.

However, this conventional head transfer device has a drawback in that workability is poor when finely adjusting the transfer direction of the magnetic head 1. That is, the position and number of recording tracks on the magnetic disk 2 from the center of rotation are specified for compatibility with other similar 11K disk devices, and the specified position of each recording track is As shown in the above-mentioned recording/reproduction (1), it is necessary for the above-mentioned head transport device to adjust a constant head feed amount and to position the magnetic head 1 on a reference recording track of the magnetic disk 2. This is determined by the diameter of the pulley 9 and the rotation angle of the step motor 7. For the latter adjustment, a rough adjustment is made by supplying horn pulses to the step motor 7 to move the magnetic head 1 close to the reference recording track.
1) Attach the main body of the step motor 7 to the board 12, loosen the screw 13, and rotate it within the range of the elongated hole set in the board 12 using a special jig. For this reason, if the rotation angle per pulse of the step motor 7 is small (well, with the above adjustment method, a small rotation angle adjustment may result in a large change in the magnetic head position, and it is difficult to accurately Difficult to adjust
child. Loosen the screw 13 so that the main body of the step motor 7 can be rotated with respect to the board 12, and then tighten it after adjusting the rack.
2, the steel heald 5 is no longer parallel to the guides tPil13a and 311, and a constant 1-
There was a fear that it would not be possible to realize rack feeding.

Furthermore, a step motor 7 is installed below the board 12 (q' G
In such cases, the adjustment work was extremely difficult. .

OBJECTS OF THE INVENTION The present invention has been made to eliminate the above-mentioned conventional drawbacks, and an object of the present invention is to provide a head transfer device that can easily and accurately adjust the position of the head.

Structure of the Invention In order to achieve the above object, the head transfer device of the present invention includes:
a head, a head support that supports the head, a head transfer member, and guide means that guides the head transfer member and the head support along the radial direction of the disk cliff;
The head transfer section (, 4) and the head support are connected and their relative positional relationship in the eye disk radial direction is adjusted.
The adjustment means includes a head transport drive means for driving the head transport member along the guide means.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 2 and 3, 14 is a magnetic disk, and 15 is a magnetic head. This magnetic head 15 is mounted on a head support 16, and is movable in the radial direction of the magnetic disk 14. , guide shafts 17a, 17b
Guided by. Reference numeral 18 denotes a head transfer member, which is guided by the guides 17a and 17b so as to be able to reciprocate 6 in the same manner as the head support 16. Is this head transfer 5th part? In order to drive the head support 16, reference numeral 8 includes a 1t1 head transport drive means similar to the conventional example shown in FIG. 1, including a step motor 19, a pulley 20,
It is driven by a head transfer drive means composed of a steel belt 21 and a plate spring 22 for tensioning the spool bells 1 to 21.

Further, the step motor 19 is fixed to the lower surface of the substrate 23 with screws 24. Reference numerals 16a and 18a denote protrusions that are integrally provided on the side surfaces of the opposing parts of the head support 16 and the head transfer member 18 so as to face each other, and the protrusion 18a of the head transfer member 18 has a A positioning pin 25 is inserted, one end of which abuts against the protrusion 16a of the head support 16, so that the head support 1G can slide smoothly during adjustment. The other end of the positioning pin 25 is in contact with a temporary spring 2G that restricts the amount of movement in the sliding direction and urges the positioning pin 25 in the axial direction. It is attached to 18. The head support body 10 and the head transfer member 18 are connected by an adjustment screw 27 that passes through the protrusion 16a and is screwed into a screw hole in the protrusion 18a.By rotating the adjustment screw 27, the head support is adjusted. The relative distance between the body 16 and the head transfer member 18 can be varied.

The head support body 1G that supports the magnetic head 15 is driven in the radial direction of the magnetic disk 14 by the head transfer drive means via the head transfer member 18. It is determined by the rotation angle per pulse 19 and the diameter of the pulley 20.

Also, the position of the magnetic head 15 is always determined by which magnetic disk 1.
In order to ensure compatibility between head transfer devices for head transfer devices 4, it is necessary to arrange the magnetic disk 14 on a recording track defined from the center of rotation. Using a magnetic disk (alignment disk) on which signals are recorded on the base/dedicated recording track of this IC, the magnetic head 15 of the head transfer device is positioned at the optimum position while observing the reproduction signal waveform. Adjust accordingly. That is, one end of the positioning pin 25 which passes through the protrusion 18a of the head transfer member 18 and is biased in the head feeding direction by the leaf spring 26 which abuts the other end is brought into contact with the head support 16, and the adjustment screw 27 is brought into contact with the head support 16. The relative positional relationship between the head support 16 and the head transfer member 18 in the head transfer direction is changed and adjusted by rotating the head forward or backward around the axis using a special jig such as a hexagonal wrench. At this time, since the coil of the step motor 19 is in an excited state, the head feeding member 18 is held in that position. It is possible to make slight movements with respect to 14 recording tracks. Further, by changing the pitch of the adjustment screw 27, the range of fine adjustment can be freely changed. Further, since the positioning pin 25 is urged in the axial direction, the adjustment screw 27
itself in the axial direction (J force, ii, tl adjustment screw 2
7 backlash is eliminated. Therefore, there is no backlash during reciprocating motion between the head support 16 and the head transfer member 18, and the precision of adjustment becomes high.

As described above, according to this embodiment, in addition to the head support 16, the head transfer member 18 guided by the same guide @17a, 17b''c is provided, and the relative distance between the head support 16 and the head transfer member 18 is determined. By providing adjustment means for varying the magnetic head 15, the position of the magnetic head 15 relative to the recording rack of the magnetic disk 14 can be easily adjusted in a short time.

Note that the head support body 16 and the head transfer member 18 are simply separated from the same member, and it is possible to use the same material and structure.

Further, the positioning pin 25 and the leaf spring 22 correspond to elastic members that draw the head support body 16 and the head transfer member 18 toward or away from each other.
For example, a similar effect can be obtained by using a tension coil spring or the like.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, when adjusting the magnetic head to a slight vA with respect to a recording track located at a prescribed position from the center of rotation of the magnetic disk, the main body of the step motor is rotated as in the conventional method. The adjustment can be easily made in a short time and with high accuracy while observing the reproduction signal of the reference disc without having to manually adjust the reference disc.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional head transfer device, FIG. 2 is a perspective view of a head transfer device according to an embodiment of the present invention, and FIG. 3 is an enlarged side view of the same essential parts. 14...Magnetic disk, 15...Magnetic head, 1G
...Head support body, 17a, 17b...Guide shaft,
18... Head transfer member, 19... Step motor, 25... Positioning pin, 2G... Leaf spring, 27...
... Coordination Dog Agent Yoshihiro Moriki Figure 1/2 t3 Figure 2 Figure 3

Claims (1)

[Claims] 1. A head, a head support that supports the head,
A head transfer member, a guide means for guiding the head transfer member and the head support along the disk radial direction, and a relative positional relationship between the head transfer member and the head support in the disk radial direction. Adjust the
A head transfer device comprising: a JA pitcher; and a head transfer drive means for driving the head transfer member along the guide means. 2. The adjustment means includes an elastic member that biases the head support and the head transfer member in a direction that moves them away from each other, and an adjustment member that changes the distance between the head support and the head transfer member in the disk radial direction. A head transfer device according to claim 1, which has a small structure. 3. The adjustment means includes an elastic member that urges the head support and the head transfer member toward each other, and an adjustment member that changes the distance between the head support and the head transfer member in the disk radial direction. A head transfer device according to claim 1, wherein the head transfer device has the following configuration.