JPS632993Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a magnetic head mounting device that allows easy and highly accurate adjustment of the relative position between the gap of the magnetic head and the recording medium in a magnetic recording/reproducing device using a recording medium such as a magnetic tape. The purpose is to make it possible to do so.

In general, the relative positions of the head gear and tape include track height, gear azimuth, tilt, protrusion, and tangibility.
The distance between heads among multiple heads, etc. can be considered. Of the above, the present invention particularly relates to protrusion, tangibility, and distance between heads.

One of the things that affects the characteristics of magnetic recording and reproduction is space loss. Due to the gap created between the head gap and the tape, L _s = -54.6 (d/λ)
(However, a loss expressed as d=gap, λ=wavelength) occurs. This loss increases as the recording wavelength λ becomes shorter, and becomes a serious problem in recent high-density recording. One of the causes of space loss is
This is the state in which the tape is wrapped around the head. If the tape winding angle is not appropriate or the head gap is off from the center of the tape winding position, the reproduction output will deteriorate due to base loss. Considering the state of contact between the head and the tape, space loss is minimized when the head gap is placed in the center of the tape winding position and the tape is evenly wrapped on both sides of the head gap.

In particular, it has been experimentally confirmed that with short wavelength recording, there is a large space loss due to the deviation (tangency) of the head gap position from the above state. (within ±0.5°, etc.) is required.

Conventionally, this adjustment has been carried out by moving the head position within the range of play in the head mounting screw hole (elongated hole, etc.) and fixing it at a position where the playback output is maximum. This was possible in long wavelength recording, but since short wavelength recording required high precision, adjustment took time and sufficient precision could not be obtained. Furthermore, in the conventional method, the head protrusion changes at the same time as the tangibility adjustment, which makes the adjustment extremely difficult when the above-mentioned high precision adjustment is required. Also, due to changes in the protrusion, the wrap angle of the head changes, making it impossible to obtain the required wrap angle due to the design of the head, and due to changes in the protrusion, the tape running path around the head changes. This had an adverse effect on other components (other heads, tape cleaners, etc.).

Particularly when editing with a magnetic recording/reproducing device configured with multiple heads, it is better to keep the distances between the synchronizing signal reproducing head and the recording head, and between the erasing head and the recording head, as small as possible in order to improve editing accuracy. In digital recording, etc., methods are used to eliminate the above-mentioned intervals by electrically processing signals. At that time, when considering compatibility when replacing the head or the unit including the head, it becomes necessary to set the spacing between each head with high accuracy (±0.1 mm, etc.). However, in the conventional method, the distance between the heads is not determined when the heads are attached, and the distance between the heads also changes at the same time when adjusting the tangibility, so it is difficult to set the head with high precision.

The present invention attempts to easily and accurately adjust the tangibility while solving the above problems.

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a front view and a sectional view of the magnetic head mounting device in the first embodiment. In the figure, a base 2 on which a magnetic head element 1 is mounted is provided with a V-groove 3 as a notch, and a substrate 4 is provided with a fixed shaft 5. The position of the fixed shaft 5 is
It is positioned with high precision on the top. The head 1 is attached to the base 2 so that when the V-groove 3 is pressed against the fixed shaft 5, the center of the fixed shaft 5 is aligned with the gap position at the tip of the head 1. With the V groove 3 pressed against the fixed shaft 5, attach the base to the board 4 using the base fixing screws 6.
The magnetic tape 7 is temporarily fixed so as to be slidable, and recording and reproduction are performed using the magnetic tape 7. The base 2 is rotated around a fixed shaft 5 so that the reproduction output is maximized, and then the base 2 and the board 4 are fixed with screws 6. In this rotation, since the center of rotation is the gap position at the tip of the head 1, the distance between the heads does not change, and only the tangibility changes.

In this adjustment, the rotation center of the tangibility is set, so it is easier to adjust than before.
Moreover, adjustments can be made with high precision. In addition, by precisely setting the position of the fixed shaft 5 provided on the board 4 and the position of the V groove 3 relative to the head gap position, the distance between the heads and the head protrusion can be set with high precision, and the head protrusion can be maintained even during tangibility adjustment. , the distance between the heads is approximately constant. Therefore, the distance between the heads in a multiple head configuration can be positioned with high precision, and the tape running path does not change, so that other components and the tape wrapping angle of the heads are not adversely affected.

By providing the V-groove 3 on the base 4, the relative position between the V-groove 3 and the gap of the magnetic head element 1 can be adjusted easily when fixing the magnetic head element 1 to the base 4 with screws (not shown). In other words, high accuracy can be obtained. Also,
It is also possible to provide the base 4 with adjustment functions such as azimuth and tilt.

Next, a second embodiment will be explained using FIGS. 3 and 4. 3 and 4 show a front view and a sectional view of this embodiment. In the figure, a case 12 covering a magnetic head element 11 functions as the base.
A V-groove 13 is provided as a notch in the case 12, and a fixed shaft 15 is provided in the substrate 14. The adjustment method is the same as in the first embodiment.

In this configuration, the magnetic head element 11 is placed in the case 1.
2, the V groove 13 and the magnetic head element 1
The position relative to the gap No. 1 is determined.
Therefore, accuracy can be easily achieved compared to the first embodiment.
It also has a very compact configuration. In this way, the present invention allows the gap position and rotation center to be set with high precision using only the shaft and notch. Since the shaft is formed, for example, by press-fitting into a round hole provided in the substrate, and the notch is formed by cutting out the base, the above object can be achieved at a very low cost and with high precision. Furthermore, since the base is rotated by contacting the notch with the shaft, tangibility adjustment work is easy.

As described above, according to the head mounting device of the present invention,
After positioning the distance between a plurality of heads with high precision, individual adjustment of the tangibility can be performed easily and with high precision.

[Brief explanation of the drawing]

FIG. 1 is a front view of a magnetic head mounting device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A', FIG. 3 is a front view of another embodiment of the present invention, and FIG.
The figure is a sectional view taken along the line B-B'. 1...Magnetic head element, 2...Base, 3...V
Groove, 4... Board, 5... Fixed shaft, 6... Screw, 7
...Magnetic tape, 11...Magnetic head element, 12
... Case, 13 ... V groove, 14 ... Board, 15
... Fixed shaft, 16 ... screw.

Claims (1)

[Scope of utility model registration request] It consists of a magnetic head element, a base for fixing the magnetic head element, and a substrate for supporting the base, and a notch provided in the base is brought into contact with a shaft provided in the substrate so that the shaft is centered. A magnetic head mounting device characterized in that the base is configured to be rotatable with respect to the substrate, and the center of the shaft is substantially aligned with a gap position on the magnetic head element.