JPS6325536Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a magnetic recording and reproducing apparatus that performs high-density recording and reproducing using a narrow-track, multi-track magnetic head such as a fixed head type PCM tape recorder. Furthermore, the present invention provides a tape piece position regulating means and a head mounting structure so that tape running is not affected by head mounting accuracy in a magnetic recording/reproducing device using a magnetic tape that requires very precise tracking. This makes it easier to obtain tracking accuracy, eliminates variations in tape running due to head replacement, and improves head replacement accuracy.

First, a conventional device will be explained using FIGS. 1 and 2.

1 is a magnetic tape; 2, 3, and 4 are tapered guide posts; 5, 6, and 7 are upper flanges of each guide post; 8, 9, and 10 are lower flanges of each guide post; 11 is a recording head; 12 is a head chip, 13 is a reproduction head, 14 is a head chip, and 15, 16 are head mounting seats, and the mounting positions of the heads 11, 13 are set by changing the thickness and inclination of the seats. Note that some head mounting seats 15 and 16 are provided with mechanisms for fine adjustment of azimuth and height, but these are omitted here. Reference numeral 17 denotes a head block board, on which head mounting seats 15 and 16 are attached, and is fixed to supports 18 and 19 with screws 20 and 21. Reference numeral 22 denotes a traveling base plate to which guide posts 2, 3, 4 and support columns 18, 19 are fixed.

Nowadays, when recording and reproducing with a narrow track multi-track head, tape piece position is regulated by guide posts 2, 3, 4 and their lower flanges 8, 9, 10 in order to obtain tracking reproducibility. The reason why the heads 11 and 13 are mounted together on the headblock board 17 as one unit is to simplify the work by replacing the entire headblock board 17 when replacing the heads. Of course, in this case, the headblock board 17
The heads 11 and 13 must be assembled in advance with a predetermined precision. In such a configuration, tracking is less affected by the width accuracy of the tape 1, and therefore high reproducibility can be obtained.
Moreover, if a head block board 17 with a replacement head attached is prepared in advance, the task of replacing the head becomes easier.

However, if even higher precision tracking is required in this configuration, the following problem will occur.

First, the tape 1 is unilaterally regulated at the lower flanges 8, 9, and 10, so its position there is stable, but there is no position regulation at the head tips 12, 14, making it unstable. The height of the tape 1 is largely determined by the lower flanges 8, 9, 10, but the height of the tape 1 is determined by the lower flanges 8, 9, 10,
It is affected by the assembly accuracy such as the inclination of 4. In FIGS. 2a and 2b, the reproduction head 13 is taken as an example, and arrows A, B, C, D, and E indicate factors of assembly accuracy of the head (more precisely, the head chip portion).

Part numbers correspond to FIG. For example, A
Even if the assembly precision of D is improved, the height of the tape 1 will change by a minute amount due to variations in the precision of D, resulting in variations in tracking by the heads. In addition to D, tape 1 is also used for C, B, and E.
Since this has a slight effect on the height of the head 13, the precision of assembling the head 13 becomes extremely difficult as tracking becomes more precise. In reality, it is impossible to satisfy the assembly accuracy of A, B, C, D, and E with high accuracy, and there is a limit to the accuracy of tracking. Furthermore, in FIG. 1, when the height of the tape 1 at the position of the head tip 12 changes, there is a phenomenon in which the height at the position of the head tip 14 also changes slightly under the influence of the change. Therefore, the adjustment procedure becomes very complicated, as the mounting position of the recording head 11 is adjusted, the mounting position of the reproducing head 13 is corrected, and the adjustment is made again by returning to the recording head 11. From this point as well, there is a limit to the accuracy of tracking.

The present invention addresses these issues,
An example of this will be described below with reference to FIGS. 3 to 5.

23 is a magnetic tape; 24, 25, and 26 are tapered guide posts; 27, 28, and 29 are upper flanges of each guide post; 30, 31, and 32 are lower flanges of each guide post; 33 is a recording head; 34 is the head chip, 35 is the playback head, 36 is the head chip, and 37 and 38 are head mounting seats, which allow fine adjustment of the azimuth.

39 and 40 are regulating surface guides, and the tape 23
The lower ends of the heads 33 and 35 are in close contact with each other, and are separated from the heads 33 and 35. Reference numeral 41 denotes a head block board, to which head mounting seats 37 and 38 are attached, and is fixed to supports 42 and 43 with screws 44 and 45. 46 is a running board, and guide post 2
4, 25, 26, support columns 42, 43, and restriction surface guides 39, 40 are fixed. Figure 4 is the third
This is a sectional view taken along the line A-A in the figure, and the tape 23 crosses the guide surfaces of the regulating surface guides 39 and 40. In addition, FIG. 5 shows the head block board 4 of FIG.
1 is an exploded view with the head block board 41 removed, and the head is replaced together with the head block board 41 as shown in the figure.

Now, in FIG. 3, the tape 23 is regulated in one position by the regulating surface guides 39, 40, and the regulating force is applied by the guide posts 24, 25, 26. Upper flanges 27, 28 of the guide post,
29 and the lower flanges 30, 31, 32 are spaced apart from the end of the tape 23 and do not participate in regulating one position for tracking. head tip 34,
The height of the tape 23 at 36 is the height of the regulating surface guide 3.
The tape 23 is determined by the height of the regulating surfaces 9 and 40, and the tape 23 is attached to the guide posts 24, 25, 2 on both left and right sides of the regulating surface guides 39 and 40.
Since the downward regulating force is applied by the taper 6, stable one-sided position regulation is performed. Therefore, the assembly accuracy of the heads 33 and 35 does not affect the regulation of the one-sided position of the tape 23, unlike in the past, and high accuracy is achieved only in the required direction (for example, in the height direction indicated by A in FIG. 2). This simplifies assembly and enables more accurate tracking. Furthermore, even if the mounting position of the recording head 33 is adjusted, the height of the tape 23 there does not change, so the height of the tape 23 at the reproducing head 35 does not change and remains stable. Therefore, it is no longer necessary to adjust the mounting position of the recording head 33, correct the mounting position of the playback head 35, and return to the recording head 33 again as in the conventional method. can be adjusted independently.

Further, the procedure of setting the azimuth of the recording head 33 by operating the azimuth fine adjustment mechanism of the head mounting seat 37 becomes simple and reliable, and more accurate tracking becomes possible. In addition, since the head can be replaced by disassembling it as shown in Figure 5,
Installation and assembly accuracy of heads 33 and 35 is tape 2
3, and is very convenient for headblock replacement in the case of high-precision tracking. In particular, since the assembly precision of the replacement headblock is easier than before, it becomes easier to manufacture and supply the replacement headblock. Simple head block replacement is also possible for high-precision tracking, in which head replacement work is completed by simply attaching a pre-assembled head block with screws 44 and 45. Of course, in that case, it is necessary to maintain the relative height accuracy of the pillars 42, 43 and the regulating surface guides 39, 40 constant in the multiple manufacturing decks where the headblocks are to be replaced. lower flange of guide post 3
Relative height accuracy of 0, 31, 32 is no longer required,
This also makes it easier.

As described above, the present invention provides an effective means for preventing variations in tape running due to errors in the head mounting position, which are a problem when performing high-precision tracking by regulating tape piece positions. Yes, and the effect is great.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a conventional tape running section;
Figures 2a and b are explanatory diagrams of head assembly accuracy, Figure 3 is a front view of the tape running section of an embodiment of the present invention, Figure 4 is a sectional view taken along the line A-A' in Figure 3, and Figure 5 The figure is an exploded front view with the headblock removed. 24, 25, 26...Guide post, 33, 3
5... Head, 39, 40... Regulatory surface guide, 4
2, 43... Support column, 41... Head block board, 46... Running board.

Claims (1)

[Scope of utility model registration request] a first substrate comprising a plurality of one-side position regulating means having a magnetic tape position regulating surface and one-position regulating force generating means provided respectively upstream and downstream thereof; a plurality of fixing heads; and a second substrate having fixing means for the substrate;
At the position where the second board is fixed to the first board by the fixing means, the position regulating surface of the one-side position regulating means is aligned with the end face of the magnetic tape at the front end of each of the fixing heads. A magnetic recording/reproducing device characterized in that the magnetic recording/reproducing device is provided to match the contact position.