JPH0319050Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combination head that includes two independent magnetic heads for recording and playback.

Generally, audio tape recorders that allow the recording contents to be monitored during recording operation use a combination head in which two magnetic heads, one for recording and one for reproduction, are fixed to the same base.

FIG. 1 shows an example of a conventional combination head. This combination head has a recording head 2 and a reproducing head 3 inserted into a rectangular cylindrical case 1 in close contact with each other. A tape guide 4 is fixed to the side of the case 1, and a mounting plate 5 is fixed to the lower part of the case 1. When mounting this combination head on the head base 6 of a tape recorder, a spring 8 is interposed between the mounting plate 5 and the head base 6, and the mounting screw 9 is inserted into the mounting plate 5, and the tip of the mounting screw 9 is It is adapted to be screwed onto the head base 6. Then, in an adjustment step when assembling the tape recorder, the mounting screws 9 are rotated to align the respective heads 2 and 3 with respect to the running position of the tape 10.

However, the conventional structure described above has the disadvantage that the two heads 2 and 3 move simultaneously during adjustment using the mounting screws 9, making it impossible to align each head individually. Therefore, in the manufacturing process of a combination head consisting of two heads 2, 3 and case 1, it is necessary to align the gaps of each head 2, 3 on the same line. Therefore, in the past, it was necessary to maintain a high level of accuracy in the external dimensions of each head 2 and 3, the position of the gap, etc.
The manufacturing cost of the head was increasing. Also, 2
The work of attaching the heads 2 and 3 to the case 1 also required extremely sophisticated procedures.

The present invention solves the above-mentioned drawbacks of the conventional magnetic head, and makes it possible to adjust the alignment of one magnetic head with respect to the other magnetic head in multiple directions, thereby improving the positional accuracy of the heads and reducing the assembly work. The object of the present invention is to provide a combination head that is easy to use.

Embodiments of the present invention will be described below with reference to FIG. 2 and the following drawings.

FIG. 2 is a perspective view of the combination head according to the present invention, FIG. 3 is a front view, and FIG. 4 is a right side view.

The combination head shown in Figure 2 and below is
This corresponds to the conventional case 1, heads 2, 3, and mounting plate 5 shown in FIG. 1, and this combination head is mounted on a head base 6 of a tape recorder.

Reference numeral 11 in the figure is a flat base, and the reproducing head 12 is directly fixed onto this base 11. That is, a mounting plate 13 is fixed to the reproducing head 12 by spot welding or the like. This mounting plate 13 is fixed onto the base 11 with two fixing screws 14.

On the other hand, a recording head 15 located side by side with the reproduction head 12 has an adjusting plate 16 fixed thereto by spot welding or the like. The adjustment plate 16 is formed with three bent support parts 16a, 16b, and 16c. And, these support parts 16a, 16
A spring 17 is interposed between b, 16c and the base 11, and mounting screws 18 inserted into the supports 16a, 16b, 16c are screwed into the base 11. With this spring 17 and mounting screw 18, each support portion 16a, 16b, 16c has a
A mechanism for adjusting the distance between the adjustment plate 16 and the base 11 is configured. Further, a tape guide 19 is fixed to the side surface of the reproducing head 12 by spot welding or the like. Furthermore, the base 11 is provided with two mounting holes 11a.

Next, the operation and effects of the present invention with the above configuration will be explained.

With the combination head shown in FIG. 2 onwards assembled, each mounting screw 18 is rotated to align the recording head 15 with respect to the playback head 12. In this adjustment work, each support portion 16 of the adjustment plate 16 is rotated by rotating each mounting screw 18.
The distance between a, 16b, 16c and the base 11 is changed. Then, the entire adjustment plate 16 is moved in the direction perpendicular to the base 11 (Z direction), or the adjustment plate 16 is tilted with respect to the base 11 (α with respect to the X axis).
the gap of the recording head 15 is made to match the gap of the playback head 12 by changing the inclination in the direction β and the inclination in the β direction with respect to the Y axis.

In addition, place the combination head, which has undergone fine adjustment between the heads, on the head base 6 of the tape recorder.
(See Figure 1). At this time, insert a mounting screw (corresponding to 9 in Fig. 1) into the mounting hole 11a of the base 11, and cover this mounting screw with a spring (corresponding to 8 in Fig. 1) to attach the head base. Screw on 6. When adjusting the entire tape recorder, the distance between the base 11 and the head base 6 is adjusted by rotating the mounting screw, and the two heads 12 and 15 are aligned with the running surface of the tape 10. .

In the illustrated embodiment, the adjusting plate 16 is supported at three points, but it may be supported at four points on the base 11.

As mentioned above, according to the present invention, the following are listed. It becomes effective.

(1) At the stage of a combination head unit in which a pair of magnetic heads and a base are integrated, the relative positions of the gaps of both magnetic heads can be adjusted. Therefore, it can be attached to a head base such as a tape recorder as a combination head unit in which the relative positions of the gap are already aligned with high precision, and both gap of both magnetic heads that are aligned with each other can be used as a combination head unit, and the running tape It becomes possible to match the

(2) Since the gap of one magnetic head can be aligned on the board using the gap of the other magnetic head as a reference, the reference for gap alignment during adjustment work is clear.

(3) A pair of magnetic heads are lined up almost closely, and the adjustment plate to which one of the magnetic heads is fixed can adjust the distance from the base using three or more supporting points. , the spacing between these supports is
It is wider than the width of both magnetic heads.
Therefore, it is possible to adjust the inclination of one side of the magnetic heads that are in close contact with each other using adjustment parts with long intervals, and it is possible to make fine adjustments such as adjusting the inclination of the gap. You will be able to obtain Yonhetsudo.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional combination head attached to the head base of a tape recorder; Fig. 2 and the following show a combination head according to the present invention; Fig. 2 is a perspective view;
FIG. 3 is a front view, and FIG. 4 is a right side view. 11... Base, 12... Playback head, 13...
Mounting plate, 15...Recording head, 16...Adjustment plate,
16a, 16b, 16c...Support part, 17, 18
...Mechanism that adjusts the spacing.

Claims (1)

[Scope of utility model registration request] This is a combination head in which two independent magnetic heads are attached to a flat base, and the two independent magnetic heads are arranged in close contact with each other, and one magnetic head is attached to the base. The other magnetic head is fixed to an adjusting plate, and this adjusting plate is supported on the base by three or more supporting parts, and the supporting parts of the adjusting plate are connected to two or more points. The combination head is arranged at intervals longer than the width dimension of the magnetic head, and each support part is provided with a mechanism for adjusting the interval between the adjustment plate and the base. .