JPS61260458A - Tape traveling device for magnetic recording and reproducing system - Google Patents

Abstract

PURPOSE:To improve recording and reproducing characteristics by providing a tape guide which controls an edge opposite to the edge controlled with another tape guide, in each of prescribed positions before and after said tape guide. CONSTITUTION:A tape guide 6c is providedon the extension of the magnetic gap 6d of a recording head 6a and on the tape sliding face of the recording head 6a so that positional relations between a magnetic tape 1 and a recording track on the magnetic tape 1 formed by the magnetic gap part 6d are kept, and the upper edge of the magnetic tape 1 is controlled by the tape guide 6c. Tape guides 9a and 9b which control the edge opposite to the edge of the magnetic tape 1 controlled by the tape guide 6c are attached onto a head base 8 with the tape guide 6c between them, and the attitude of the head base 8 is controlled to control the attitudes of tape guides 9a and 9b and the hed 6 simultaneously. Thus, recording and reproducing characteristics are improved.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an improvement in a tape running system in which a tape is provided with an ID. This invention relates to a magnetic recording/reproducing tape running device that allows for good regulation.

[Prior art and its problems] In recent years, high-quality recording and playback has been required in magnetic recording and playback devices, especially in the audio field, and in connection with this, the positional relationship between the tape running system and the magnetic head has been improved. Greater precision is desired. This requirement is particularly strict in the field of digital audio recorders. It is well known that azimuth fluctuations and track misalignment between the magnetic tape and the magnetic head cause deterioration of short wavelength information, phase shift, etc., and as a result, the reproduced waveform during reproduction becomes unstable. It is being

The causes of instability in the tape running system are caused by many factors, such as vibrations of the capstan and pinch roller shaft, and problems with the accuracy of the tape storage case.

However, even if there are various problems with this method, the above problems can be alleviated by regulating the relative position between the magnetic head and the tape running.

FIG. 6 is an external view showing a tape running system using a conventional tape guide that regulates the relative position between the magnetic head and the tape running.

In FIG. 6, 1 is a cassette case fitted into a cassette storage part of a cassette tape recorder, 2 is a magnetic tape, and 3 is a magnetic connector. Further, 1a is a window of the cassette case, 1b is a window of the cassette case through which the magnetic head moves in and out, and 4 is a head mount that fixes the magnetic head 3, and this head mount 4 is attached to the mounting member by screws 5. 6 with screws spaced apart from each other by a predetermined distance. A fill spring 7 is provided on each shaft portion of the screw 5 so as to pass through the shaft portion, and the fill spring 7 elastically presses the lower surface of the helad mount 4 and the upper surface of the mounting member 6. Reference numeral 8 denotes a tape guide that regulates the relative position between the magnetic head 3 and the running of the magnetic tape 2. The tape guide 8 is made of a plate-like member and is fixed to one side surface of the magnetic head 3 in advance.

One end of the tape guide 8 has a U-shaped notch with a width that is approximately the same as the width of the tape 2, and the upper and lower arms are used to position the magnetic tape 2 between the two sides. The magnetic tape 2 is guided so that the magnetic recording surface on the top of the magnetic helad 3 and the recording surface of the magnetic tape 2 are correctly aligned.

Further, when the mounting member 6 is pressed in the direction of the arrow in the figure by a drive means (not shown), the magnetic head 3 to which the tape guide 8 is fixed is inserted into the window 1b, and presses against the magnetic tape 2, and at the same time presses the tape guide 8. The magnetic tape 2 is guided between the arms of the folded notch.

Note that FIG. 7 shows the relative positional relationship in the tape playback or recording mode.

By the way, in the conventional tape running system shown in FIG. 6, the guide 8, which is directly attached to the side surface of the magnetic tape 3, is a mere thin plate that guides the magnetic tape 2 between the two arms of the notch.
However, there is a drawback that only rough tape running regulations can be achieved. Further, in order to increase the regulating effect, if the notch of the folded plate of the guide 8 is made narrower, there are problems such as damage to the edges of the magnetic tape.

[Object of the invention] The present invention eliminates the above-mentioned conventional problems and regulates the relative position of the traveling tape and the magnetic head Y without damaging the magnetic tape, thereby improving recording and playback characteristics. The purpose of this invention is to provide a magnetic recording/reproducing type tape running device that can perform the following functions.

[Structure 1 of the Invention] The magnetic recording/reproducing tape running device of the present invention maintains a positional relationship between one edge of the tape on the magnetic gap of the recording head or on the extension thereof with respect to the track formed by the recording head V. The present invention is characterized in that it includes a tape guide for regulating, and a tape guide for regulating an edge on the opposite side of the edge regulated by the tape guide at predetermined positions before and after the tape guide in the tape traveling direction.

[Example 1 Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram of an embodiment of the tape running device of the present invention.

Reference numeral 1 denotes a magnetic tape, and the magnetic tape 1 is slid on the tape sliding surface of the recording head 6 by pinch rollers 4 and 5 driven by capstans 2 and 3. This magnetic helad 6 is installed on a head base 8 via a head stand 7 that allows adjustment of the mounting position of the hed 6. When high-fidelity recording and reproduction characteristics are required, recording A recording head 6a for recording and a reproducing head 6b for reproduction are provided independently. Furthermore, this record spatula)'
6a is provided with a tape guide 6c, which guides the magnetic gap 6 of the recording head 6a as shown in the enlarged view of FIG.
d and on the tape sliding surface, the magnetic tape 1 is formed by the magnetic tape 1 and the magnetic gap portion 6d.
A tape guide 6c is provided to regulate the upper edge of the magnetic tape 1 so that the positional relationship with the upper recording track can be maintained.

This tape guide 6c is a magnetic tape 1 as shown in FIG.
The lower edge may be restricted instead of the upper edge, and instead of the locally convex edge shown in the figure, the tape of the recording head 6a as shown in FIG. They may be provided uniformly on the sliding surface.

6e is a magnetic gap portion above the reproducing head 6b. Further, tape guides 9a and 9b that regulate the edge of the magnetic tape 1 opposite to the edge regulated by the tape guide 6c are mounted on the head base 8 so that the tapes sandwich the edge 6c, and control the attitude of the head base 8. By doing so, the postures of the tape id 9a, 9b and the head 6 can be controlled simultaneously.

The tape guides 9a and 9b used here have a stepped portion 9c as shown in FIG. 4, for example.

The structure of the tape guides 9a and 9b is not limited to this, but as long as it regulates at least one end of the edge of the tape 1, the magnetic tape 1 can be moved to the capstan shaft 2. 3 and pinch rollers 4 and 5, the traveling of the magnetic tape 1 is regulated at both ends by the id 6c, 9a and 9b, and the positional relationship with the head 6 is maintained correctly.

Now, in magnetic recording, the improvement in recording density is remarkable, and the recording wavelength is becoming shorter.For this reason, the problem of track deviation is also important, but the problem of azimuth deviation becomes rapidly more difficult as the wavelength becomes shorter. Therefore, it is more important.

The effects of the tape guide 6c attached to the head 6 and the tape guides 9a and 9b on the magnetic tape 1 will be explained below with reference to FIG.

At this time, use a tape with a width equal to the height from the straight line connecting the height regulating parts of guides 9m and 9b to the regulating part of guide 6c (
In the case of (broken line in the figure), the tape runs without being affected by each guide, suppressing displacement in the width direction of the tape. On the other hand, the width Wt(
When the tape 1 (Wt > Wg) runs, the running direction of the magnetic tape 1 will change slightly at the regulating portion of each guide. If this angle is θ, then θ=Tan-'(Wt-Wg)/A-1(Wt
Wg)/12. Since the tape width has a tolerance of several tens of micrometers, the deviation in the running direction due to the tape width is on the order of 10' to several 10'. , or between 6c and 9b, the above-mentioned deviation in the running direction causes an azimuth deviation, but when the tape guide V6c is placed with respect to the recording head 6a, the magnetic gap 6d of the recording head 6a is If it is placed on the same line as the regulation point of ID 6c, the above-mentioned 7-jima deviation can be eliminated, and it is very effective to ensure so-called compatibility, where a tape recorded with one tape transport device is played back with another tape transport device. It is an effective means for

[Effects of the Invention 1] As detailed above, the present invention includes a tape guy Y for regulating one edge of the magnetic tape on the magnetic gap extension of the recording head, and regulating one edge of the magnetic tape pond. A tape guide having a stepped portion is provided to sandwich the tape guide on the magnetic gap extension, thereby suppressing displacement of the magnetic tape in the width direction and eliminating azimuth errors during recording, improving recording and playback characteristics. The recording tape recorded by this tape running device can maintain the above-mentioned recording/playback characteristics even in other tape running devices, and has compatibility.

[Brief explanation of the drawing]

FIG. 1 is a front view of a tape running device showing one embodiment of the present invention, FIGS. 2 and 3 are enlarged perspective views showing an example of the magnetic head shown in FIG. 1, and FIG. 4 is a tape drive device shown in FIG. FIG. 5 is an enlarged perspective view showing an example of a guide, FIG. 5 is a view for explaining the effect of the tape guide in FIG. 1, and FIG. 6 is a perspective view showing a conventional tape running system. 1...Magnetic tape, 6...Magnetic head, 6a...
Recording head, 6b... Playback head, 6c... Tape guide, 6d, 6e... Magnetic gap, 7... Head stand, butt... Head base, 9a, 9b... Tape guide, 9C. ...Stepped part.

Claims (1)

[Claims] 1) In a magnetic recording/reproducing system, a tape guide is provided on the magnetic gap of the recording head or on an extension of the recording head to regulate one edge of the tape so as to maintain a positional relationship with respect to the track formed by the recording head. 1. A magnetic recording and reproducing tape running device, comprising: a tape guide that regulates an edge on the opposite side of the edge that the tape guide regulates at predetermined positions before and after the tape guide in the tape traveling direction.