JPS624900Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head device constructed by combining a recording head and a reproducing head.

A combination head is known which is constructed by combining a separate recording head and a reproduction head. The method of manufacturing such a combination head is to attach a recording head and a playback head to an assembly jig during assembly, run a tape to perform recording and playback, and adjust the track position, tilt, and tilt of each head. Azimuth, L-channel, R-
The method used is to electrically detect the electrical phase of the channel, adjust the position of each head based on this detection result, and then glue and integrate the shield case parts of each head. . However, with this method, accurate adjustment was difficult due to differences between the tape running system of the assembly jig and the mounting tape running system of a product using a combination head, as well as variations in the accuracy of the cassette half itself. .

This invention enables recording and
This allows the positional relationship of the playback heads to be adjusted optimally.

Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 is a front view showing the head assembly attached to the head board, Figure 2 is a bottom view of the head assembly, Figure 3 is a cross-sectional view of Figure 2, and Figure 4 is a cross-sectional view of Figure 2. - It is a cross-sectional view. Further, FIG. 5 is an exploded perspective view of the head assembly, FIGS. 6A and 6B are front and bottom views of the recording head assembly, and FIGS. 7A and 7B are side and front views of the playback head assembly. , 8A and 8B are a side view and a top view of the head base.

As shown in FIG. 1, a recording head 1 (hereinafter simply referred to as R head) and a playback head 2 (hereinafter simply referred to as P head) are connected via an R head mounting plate 3 and a P head mounting plate 4, respectively. It is attached to the head base 5. This head base 5 is adjustably attached to a head board 6 of a tape recorder.

As shown in FIGS. 6A and 6B, the R head 1 is spot welded to the base 3a of the R head mounting plate 3. As shown in FIGS. Screw holes 10a and 10b are formed at both ends of the base 3a of the mounting plate 3, and a hole 10c is formed at the tip of a projecting piece 3c extending laterally from the base 3a through a step 3b approximately equal to the thickness of the plate. is formed. Note that tracks 11L and 11R for two channels are formed at the lower part of the tape sliding surface 1a of the R head 1, and gaps 12L and 11R are formed in these tracks.
2R are formed respectively.

As shown in FIGS. 7A and 7B, the P head 2 is spot welded to the base 4a of the P head mounting plate 4. As shown in FIGS. Screw holes 13a and 13b are formed at both ends of the base 4a of the mounting plate 4, and a screw hole 13c is formed at the side 4b bent at almost right angles to the base 4a.
is formed. As shown in FIG. 5, the tape guide plate 14 is attached to the side portion 4b of the mounting plate 4 by screwing the bus 20 into the screw hole 13c. Note that the tape sliding surface 2 of the P head 2
At the bottom of a is a track 15L for 2 channels,
15R is formed, and gaps 16L and 16R are formed in these tracks.

As shown in FIGS. 8A and 8B, the three corners of the head base 5 have holes 21a, 21b,
21c is formed, and the lower part of each hole is a recessed portion for mounting a spring. 1st, 3rd, 4th
As shown in the figure, the screws 22a to 22c pass through the holes 21a to 21c in the head base 5, and then through the compression springs 23a to 23c, and are screwed into the screw holes 19a to 19c in the head board 6. Thus, the head base 5 is supported by the head base plate 6 in an adjustable manner.

P head mounting base portions 24a, 24b are formed on both sides of the approximately central portion of the head base 5, and holes 25a, 25b are formed in the base portions 24a, 24b. As shown in Figures 1, 2, 4, and 5, insert the screws 26a and 26b into the holes 25 from the bottom of the head base 5.
a, 25b to the screw hole 1 of the P head mounting plate 4.
3a and 13b, the P head assembly is fixed to the head base 5.

In addition, the P head mounting portion 24a of the head base 5,
An R head mounting base 27 is formed on the side of 24b, and holes 28a and 28b are formed on both sides of this base. P head mounting base parts 24a, 24
A groove 29 is formed in the middle part of b, and as shown in FIGS. 1 and 3, the projecting piece 3c of the R head mounting plate 3 is hidden under the head mounting plate 4 in this groove 29. Then, the R head mounting plate 3 is attached to the head base 5. A screw hole 30 is provided at the tip of the groove 29.
is formed. Therefore, as shown in FIGS. 3, 4, and 5, the screw 33c passes through the hole 10c at the tip of the protruding piece 3c of the R head mounting plate 3, and then passes through the compression spring 34c to attach the head base 5. Above screw hole 30
The screws 33a and 33b pass through the holes 28a and 28b from below the head base 5, and then the compression springs 34a and 34b are inserted into the screw holes 10a and 10b of the R head mounting plate 3. As a result, the R head assembly is adjustably mounted on the head base 5.

Next, the method of assembling and adjusting the magnetic head device of this embodiment will be explained. First, the R head assembly shown in FIGS. 6A and 6B is mounted on the head base 5 using screws 33a to 33c and via springs 34a to 34c. mounted on. Next, the P head assembly is screw 26a,
26b, the protruding piece 3c of the R head mounting plate 3
It is fixed on the head base 5 across the head. On this occasion,
The protrusion dimension of the P head 2 with respect to the R head 1 is matched. Also, screw 3 to attach R head 1.
3a and 33b, the tilt and track height of the R head 1 are adjusted relative to the P head 2.

Next, the head base 5 is mounted on the head board 6 using screws 22a to 22c and via springs 23a to 23c. In this state, the screws 22a to 2
By adjusting the rotation of the head 2c, the heights of the R head 1 and the P head 2 relative to the head substrate 6 are adjusted. Further, by adjusting the rotation of the screw 22b, the tilt angle of the P head 2 can be adjusted. Furthermore, by adjusting the rotation of the screw 22c, P
The azimuth of head 2 is adjusted. Next, adjust the rotation of the mounting screw 33c of R head 1, and attach R head 1.
The azimuth and electrical phase of are adjusted.

In this embodiment, as shown in FIG. 6B,
Since the dimension E from the hole 10c at the tip of the protruding piece 3c of the R head 1 to the screw holes 10a, 10b of the base 3a is made sufficiently long, fine adjustment of the azimuth of the R head 1 is easy. Furthermore, since the projecting piece 3c passes through the lower part of the P head 1 and protrudes laterally, even if the dimension E is set sufficiently large, the width of the P head 2 can be used effectively, and the overall It is compact. Further, the azimuth adjustment of the R head 1 can be carried out by adjusting the rotation of one screw 33c after assembling the device, so the adjustment work is simple.

As described above, the present invention allows the projecting piece 3c of the second head mounting plate 3 to pass under the first head mounting plate 4 and protrude to the side of the first head 2,
A means (screw 33c and spring 34c) for adjusting the azimuth of the second head 1 at the tip of this projecting piece 3c
has been established. Therefore, it is possible to perform fine adjustment of the azimuth and electrical phase adjustment while maintaining a sufficiently large distance from the means for adjusting the azimuth of the second head 1 to the supporting position of the second head 1. Moreover, by effectively utilizing the width of the first head, the overall structure can be made compact. Further, the azimuth adjustment of the second head can be easily performed by using the azimuth adjustment screw 33c located at the tip of the protrusion after the head device is assembled.

[Brief explanation of the drawing]

Figure 1 is a front view showing the head assembly attached to the head board, Figure 2 is a bottom view of the head assembly, Figure 3 is a cross-sectional view of Figure 2, and Figure 4 is a cross-sectional view of Figure 2. - sectional view, FIG. 5 is an exploded perspective view of the head assembly, FIGS. 6A and 6B are front and bottom views of the recording head assembly, and FIGS. 7A and 7B are side views of the playback head assembly. and front view, No. 8A
8B are a side view and a plan view of the head base. In addition, in the symbols used in the drawings, 1...
...recording head, 2...playback head, 3...R head mounting plate, 4...P head mounting plate, 5...head base, 6...head board, 22a-22c...screws, 23a-23c... ...compression spring, 33c...screw, 34c...compression spring.

Claims (1)

[Scope of utility model registration request] a third head mounting plate to which the first and second head mounting plates are mounted; first and second magnetic heads fixed to the first and second head mounting plates, respectively; The third head mounting plate is attached to the head board so that its height can be adjusted, and the projecting piece of the second head mounting plate can pass under the first head mounting plate. , a space is formed between the first head mounting plate and the third head mounting plate, and the second head mounting plate is formed on the tip side of the projecting piece.
A magnetic head device having means for adjusting the head and azimuth of the head.