JPH0391113A - Rotating magnetic head device and magnetic recording/reproducing device using the same - Google Patents

Abstract

PURPOSE:To easily apply a method to a rotary magnetic head device miniaturized and rotated at high speed by a aligning the central axis of a rotary magnetic head moving device with the rotational central axis of the rotary magnetic head device. CONSTITUTION:The rotary magnetic head moving device 100 is arranged centering a cylinder. Namely, they are arranged at a state where the central axis of the rotary magnetic head moving device 100 is aligned with the rotational central axis of the cylinder. The rotary magnetic head moving device 100 is fixed on an upper cylinder 8 by tightening with a screw, and the upper cylinder 8 is fixed on a disk 10 with a screw 24, and the disk 10 is inserted with pressure to a shaft 11. Also, the shaft 11 is supported against a lower cylinder 9 rotatably with bearings 19, 20, and a metal fitting 16 to supply a preload to the bearings is fixed on the shaft 11 with a screw 17 at the lower end of the shaft 11. Thereby, it is possible to manufacture the rotary magnetic head device miniaturized and rotated at high speed capable of performing the travel of a rotary magnetic head.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording/reproducing device using magnetic tape.

[Conventional technology]

In a co-rotating magnetic head device (cylinder) of a helical scan magnetic recording/reproducing device, Japanese Patent Application Laid-Open No. 175217/1983 is a device that enables the head to move in the direction of the rotating wheel and enables precise tracking to the recording track. A rotating magnetic head device has been devised as described in the above publication.

[Problem to be solved by the invention]

The problems with such a device are that it inevitably becomes large and is easily affected by centrifugal force when rotating at high speed, so it cannot be applied to a rotating magnetic head device that is small and rotates at high speed. [Means for Solving the Problem] In the present invention, the center of the rotary magnetic head moving device in the direction of the rotation axis of the rotary magnetic head provided in eight rotary magnetic head devices. By aligning the axis and the center of rotation of the rotating magnetic head device, the action of centrifugal force is canceled,
Furthermore, in the present invention, the above-mentioned rotating magnetic head device is used to employ a novel scanning method and an auto-tracking method that enable high-density recording and reproduction.

[Effect]

By aligning the center axis of the rotating magnetic head moving device with the center of rotation of the rotating magnetic helad device, and by making the rotating magnetic head moving device symmetrical with respect to the central axis, centrifugal force that acts on the entire rotating head moving device can be achieved. The resultant force of the forces is canceled and becomes 0, so that the strength of the attachment of the rotary magnetic head moving device to the rotary magnetic head device and the strength of the rotary magnetic head moving device itself can be reduced.

Furthermore, by aligning the central axis of the rotary magnetic head moving device with the center of rotation, the outer diameter of the rotary magnetic head device becomes approximately equal to the outer diameter of the rotary magnetic head moving device, making the rotary magnetic head device compact.

In addition, the new scanning method, auto-tracking method, enables precise scanning of recording tracks and enables ultra-high-density recording. explain.

Figure 1 is a sectional view of a rotating magnetic head device (cylinder) 6 to which the present invention v4 is applied, Figure 2 is a schematic diagram of a tape running system using the cylinder 6, and Figure 5 is a circuit board 25Jf for the cylinder 6. : Shows a view from above after removing it.

The left half of FIG. 1 about the central axis shows the OA cross section of FIG. 3, and the right half shows the OB cross section of FIG. 3.

In the present invention, as shown in FIG. 1, a rotating magnetic head moving device 100 is placed at the center of the cylinder. That is, the central axis of the rotary magnetic head moving device 100 and the rotational central axis of the cylinder 6 are arranged in alignment. As will be described later, the rotary magnetic head moving device 100 is screwed to the upper cylinder 8, and the upper cylinder 8 spring screw 241 allows the disk 10 to be moved.
Fixed.

The disk 10 is press-fitted onto the shaft 11. The shaft 11 is rotatably supported fζ relative to the lower cylinder 9 by means of a bearing 1.20. At the lower end of the shaft 11, a metal fitting 16 for applying preload to the bearing is fixed to the shaft 11 with a screw 17. A rotary transformer 18 is disposed between the disk 10 and the lower cylinder 9, and transmits and receives signals between the rotating side and the stationary side.

The rotor magnet 13 of the motor, which is in contact with the holder metal fitting 12, is attached to the metal fitting 16 with screws 7. Further, a yoke 15 and a stator coil 14 wound around the yoke 15 are fixed to the lower cylinder 9, and this portion constitutes a coaxial actor-rotor type brushless motor to rotate the shaft 11. Disc 10.
When the upper cylinder 81 rotates, the magnetic head moving device t100 rotates at a constant rotation speed. A slip ring 21 is disposed coaxially with the cylinder on the upper part of the shaft 11, and contacts a brush 22 disposed on the stationary side to exchange signals with the stationary side. The rotating magnetic head moving device t100f is fixed by a slip ring 21 and a spring 26. Reference numeral 25 denotes a circuit board which is connected to the rotary magnetic head moving device 100 by screws 25.
#This is fixed. Although not shown, a preamplifier circuit and the like for amplifying the reproduction output from the rotating magnetic heads 2, 5, 4.5 are arranged on the circuit board.

The difference from the coil type device is that it has a center hole in the center for alignment. Further, in this embodiment, rotating magnetic heads 2, 5, and 4.degree. 5 are arranged on the left and right sides symmetrically about the central axis. Of course, this can be done only on one side.

The rotating magnetic head moving device r&1oo is composed of a magnetic circuit section, a drive coil bobbin section, and a leaf spring section.

The magnetic circuit part is top yoke 1o1. Actor Yoke 10
2. Base yoke 110. Ring-shaped permanent magnet 103
, 109 and a center yoke 104. Permanent magnets 1as; 109 are magnetized in the central axis direction and in opposite directions, and the gap between the cylindrical columns between the center yoke 104 and the outer yoke 102 becomes a magnetic gap, and a uniform magnetic field is formed in the radial direction. . The drive@coil 1 is wound around the pobbin 107 around this magnetic gap.
0B is placed. Bobbin 107 is ring 111
, 112 respectively to the leaf springs 105 and 1 (16).
, 106 have their outer J@ parts sandwiched and fixed between the base yoke 109 and the outer yoke 1o2, and the actor yoke 102 and the top yoke 101, respectively, and as a whole, Bobi/1o7 and the drive coil 10B are aligned in the central axis direction. As shown in FIG. 7, the 6ζ rotating magnetic head 2, 5, 4, 5, which is movably supported in the apparatus, is attached to the tip of the portion of the leaf spring 105 that protrudes to the outside of the apparatus. This protruding portion is the bobbin 107. It moves in unison with the drive coil 108, and by applying a current to the drive coil, the bobbin, drive coil, and head move in the direction of the central axis using the same principle as a speaker. The right half of FIG. 4 from the central axis shows the OC section in FIG. 5, and the left half shows the OD section. As can be seen from the external appearance of the rotary magnetic head moving device 100 shown in FIG. 7, a flange 115 is provided on the outer periphery of the base yoke 110, and a mounting hole 116 is bored here. As shown in the figure, using this mounting hole 1168, screw 27
From #c, the rotary magnetic head moving device 100 moves to the upper cylinder 8.
In the 0-rotation magnetic head moving device 100 fixed to , the center yoke 104 and the shaft 11 are tightly fitted together, so that the rotation centers of the rotary magnetic head moving device 100 and the cylinder 6 coincide with each other. therefore,
Rotating magnetic head 2. S, 4.5 is this center yoke 1
The position and orientation are adjusted and installed based on the center hole of 04. Also, when the rotating magnetic head moving device 100 is attached to the upper cylinder 8, the center axis of the upper cylinder 8 is aligned with the center axis of the hole, with the center hole of the center yoke 104 as a reference. FIG. 5 is a view from below of the assembly in which the rotating magnetic head moving device 100 is attached to the upper cylinder 8i. Rotating magnetic head moving device 1
00 is attached to the upper cylinder 8 from below by screws 27, 27'. The father cylinder 8 has a bay part 44 on the bottom surface,
44' is provided, and the leaf spring 105 and the rotating magnetic heads 2, 5, 4.5 are arranged in this part.

45 and 45' are notches for passing lead wires from the rotary transformer 18, which will be described later. FIG. 6 is a view from above of the cylinder 6 with the upper cylinder 8 removed, and 45.45' is a notch provided in this part for screws 27, 27' to be located, and 46.46' is head 2
*5* 4e 5* A groove provided for arranging the leaf spring 1058.

Lead wire 11 from drive coil 108 as shown in FIG.
4 is led out from a small hole 117 provided in the outer yoke 102, and is connected to the lead of the slip ring 21, l.
! Io and relayed on the circuit board 25. Therefore, the brush 22. Slip rig/rig 21. Lead wire 30. A current is supplied to the drive coil 10B through the lead wire 114.

The lead wires 115 from the rotating magnetic heads 2, 5, 4.5 are once collected inside the rotating magnetic head moving device 100, and then passed through a small hole 118 provided in the actor yoke 102 shown in the left half of FIG. The signal goes out from the notch 45, 45' provided in the upper cylinder and is led to the circuit board 23, where the reproduced signal is amplified.

Signals sent and received from the fixed part via the rotary transformer 18 are transmitted to the circuit board 2 by a lead wire 29 housed in a wiring fitting 28 attached to the top surface of the rotary transformer rotor.
s, from which signals are sent and received to and from the rotating magnetic head via circuit elements.

To replace the rotating magnetic head 2, 5, 4, 5J), the upper cylinder 8 can be removed by removing the brush 22, disconnecting the lead wire 29 from the circuit board 23, and removing the screws 24, 24'. . For this reason, Figure 1 number ζ
As shown, there is a notch f! above the screw 24 of the circuit board 25. I47
is provided. After removing the upper cylinder 8, the rotary magnetic head moving device 100 is replaced and reattached, and the head can be replaced with an extremely simple operation. Of course, the entire assembly including the upper cylinder 89, rotating magnetic head moving device 100, and circuit board 25 may be replaced.

Although one embodiment of the cylinder structure of the present invention has been described above, the above example is just an example, and various embodiments can be considered.

For example, although a center hole is provided in the center yoke 104 as a reference for the center axis of the rotary magnetic head moving device 100, this center hole may also be provided in the bottom of the pace yoke 110 and used as a reference hole.

In this way, instead of the ring-shaped permanent magnets 105, 109 and the center yoke 104, it is possible to use a cylindrical magnet with a center yoke. The reference hole provided in the rotary magnetic head moving device 100 was used to align the cylinder rotation center axis of the Father Schiff 589 rotating magnetic head moving device 100 assembly. Of course, it is also possible to carry out centering by straining the type I in which 10 are fitted together.

Furthermore, although the structure has been described in which the rotating magnetic heads 2, 3, 4.5 (hereinafter, the rotating magnetic heads are simply referred to as heads) are arranged on both the left and right sides of the rotating magnetic head moving device 100, it is also possible to operate the rotating magnetic heads only on one side. It is obvious that this can be achieved.

Next, a tape scanning method using the cylinder of the present invention will be described. FIG. 2 shows the tape running system, and FIG. 8 shows the tape pattern.

In FIG. 2, 51 is a supply reel 521 and a take-up reel 35.
This is a tape cassette that stores a moving tape guide 56.57°58.59 from its opening as shown by the arrow.
pulls out the magnetic tape 1 and winds the tape around the cylinder 6 in a spiral manner. 55 is a tension pin that moves as shown by the arrow, and 40 is a pinch roller that moves as shown by the arrow and is pressed against the capstan 41 to drive the tape. 54.42 is the tape guide immediately before and immediately before the cassette. As shown in the figure, the magnetic tape 1 is placed in the cylinder 6.
It has a strong winding of 800.

2, 5, and 4.5 have the same head track width and azimuth angle; heads 2 and 4 have the same azimuth angle; heads 5 and 5 have the same azimuth angle;
have the same azimuth angle different from the azimuth angle of 4. The head 2.5 is used for recording and reproduction, and the head 4.5 is used for recording monitoring.

118111E! In this embodiment, heads 2 and 5 simultaneously record signals on tape 1, as shown in FIG. As shown in FIG. 8, the recording tracks are overwritten.

If track pitch lE:P, head 2 and head 5
The height difference is precisely adjusted to P. Since these heads are closely attached to the leaf spring 105,
It is relatively easy to maintain this level difference to a precision of 6ζ. Also, there are almost no changes in level.

The pitch 2P between recording tracks with the same azimuth can be maintained more accurately than lζ by precisely controlling the tape speed during recording, so if the head height difference is precisely maintained at P, each track pitch can be maintained precisely at P. can be kept. The head track width is larger than the track pitch P.

This is to reduce the influence of mistracking during playback.

An example of recording continuous signals will be explained with reference to FIG. 81119 Assuming that the original video signal to be recorded is shown in Figure (a), a signal (signal signal) is created by delaying this signal by a time T, and as shown in (e), during the period when the head 2.5 is scanning the tape, Corresponding period head 2. A recording signal is applied to S to record the signal on the tape. The head 2 records the signal shown in FIG. 9(b), and the head 3 records the original signal shown in FIG. The delay time T is set to a value obtained by subtracting a time value obtained by dividing the distance in the scanning direction between heads 2 and 5 by the head scanning speed from one field section. This makes it possible to ensure, for example, the so-called H alignment of the recording tracks and the alignment of the horizontal synchronizing signals. In other words, by devising as described above, conventional home VTR (VH8-VTR, 8ζVTR)
A delay of 0 or T time that allows recording to be compatible with tape (TR, etc.) can be easily realized by using a digital memory or the like.

During playback, the original signal is changed by delaying the playback signal from the head 5 by one hour and combining it with the playback signal from the head 2.

Furthermore, when recording a digital signal instead of a continuous analog signal, it is sufficient to temporarily record it in a digital memory, divide it into two channels, and record simultaneously with heads 2 and 3, respectively. In this case, the tape wrapping angle around the cylinder 6 need not be more than 1800 degrees, and any value can be selected. Even in the case of recording continuous analog signals as described above, the wrapping angle can be made smaller than 1800 if the analog signals are compressed on the time axis and recorded. head 4.5
are respectively set at 180° opposite positions to the head 2.3,
The head 4 is placed higher than the head 2, and the head 3 is placed higher than the head 5 by the track pitch P. It is possible to monitor and reproduce signals recorded with S. Further, since the head 2.3 and the head 4.5 are the same double azimuth head, the head 4.5 can be used as a recording/reproducing head and the head 2.5 can be used as a monitor head. In this case, head 2.3 will monitor the information previously recorded on the tape, and is suitable for applications such as slightly changing a large amount of data in real time and re-recording it. 4.5 are attached to the same leaf spring 105, there is little change in their relative height difference, and good monitor playback can be performed stably.

In the above embodiment, head 4.5 was used as the monitor head, but in the case of a system having two recording time modes such as sp and gp, head 2.5 is used as the monitor head. S and the head track width of the head 4.5 may be changed to make the head 2.5 the recording/reproducing head for the first recording time mode and the heads 4 and 5 as the recording/reproducing head for the second recording time mode. Of course it is possible.

It is also of course possible to use the head 4.5 as a recording/reproducing head that performs exactly the same role as the head 2.3. In this case head 2 and head 4. Heads 5 and 5 are arranged at the same height, and the recording signal is divided into two channels, which are recorded by heads 2.4 and 3 and 5, respectively.

This case is suitable for recording and reproducing high frequency signals such as high definition TV double signals. The tape running speed is twice that of the above example. Also, instead of using a double azimuth head, it is also possible to use a single azimuth head instead of the 2°5 head, and use another head with a different azimuth instead of the 4.5 head to perform scanning exactly the same as a conventional home VTR. Of course it is possible.

Next, other embodiments of the present invention will be described. FIG. 10 shows the timing of tape winding around the cylinder and signal recording in this embodiment. This example is an example in which the present invention is applied to a home VTR using a so-called small diameter cylinder. Head 2 and Head 4. The heads 3 and 5 are arranged at the same height, the tape 1 is wound around the cylinder 6 by over 270 degrees, and these heads rotate at a rotation speed 1.5 times the frame frequency. In Fig. 10, (sL) is the recording signal, and (k) is the rotation period.

(C), CdJ, (e), and (f) represent the recording sections of heads 2, 5, and 4.5, respectively, and correspond to the sections in which these heads scan tape 1. This recording method is the method explained in relation to Figure 1g9,
This corresponds to the case where there are two double azimuth heads.

The original signal and delayed signal are simultaneously recorded on the tape using head 2.5, and after one field, the original signal and delayed signal are recorded onto the tape using head 4.5.
record on tape at the same time, and repeat this process. As mentioned above, since the head 2.5 and the head 4.5 are placed on the same leaf spring, if the relative height difference is set to 0 in advance,
In the case of this example, the amount of change can be said to be extremely small.
Since the head 4.5 scans the tape between the 2A fields after the head 2.5 finishes recording, it is also possible to correct the level difference in this section. For example, while reproducing with head 4.5, the head is moved little by little in the track width direction to find the position where the output is maximum, and based on this, the position at the time of recording can be found. If this is possible, the heads 2.3 and 4.5 do not necessarily need to be attached to the same rotating magnetic head moving device t100, but may be attached to separate rotating magnetic head moving devices. Also good.

According to the present invention, the number of rotating magnetic head moving devices can be reduced to one or two, which can significantly reduce the number of rotating magnetic head moving devices compared to the four required when conventionally providing a rotating magnetic head device for each head.

Next, the auto-tracking method used in the device of the present invention will be described. As described above, in the present invention, simultaneous recording and simultaneous reproduction are performed using two heads with different azimuths arranged close to each other. Since two heads record at the same time, if two heads simultaneously record a constant cycle reference signal, for example a horizontal synchronization signal, the recorded reference signal will not be affected by uneven head rotation, and the difference between the heads will increase. The data is recorded on the main track and adjacent tracks at regular intervals determined only by the distance. Therefore, if the exact same position as during recording is scanned during reproduction, if the head spacing is the same, the signals will be reproduced simultaneously at 0, that is, the time difference between the reference signals reproduced simultaneously from the two heads will be 0. However, since these heads have an azimuth angle, the timing of signal reproduction is shifted by one track shift, and the direction of the shift varies depending on whether the azimuth angle is positive or negative, and the amount of time shift is proportional to the amount of track shift.

Therefore, the amount of track deviation can be determined from the time difference between the reference signals reproduced by both heads, and tracking can be performed using this. That is, auto-tracking becomes possible by determining the amount of time lag during reproduction of simultaneously recorded reference signals, feeding it back to the drive circuit of the drive coil, and controlling the time lag to be 80 or a constant value. A block diagram of a circuit for this auto-tracking is shown in FIG.

During recording, the adder 66 adds a reference signal from the reference signal source 68 to the recording signal 77 to the head 2, and the same reference signal is added to the recording signal 78 to the head 5 by the adder 67.

If the recording signal has a signal that can be used as a reference signal, such as a horizontal synchronization signal of a video signal, this reference signal application J
E: It can be eliminated. A signal with a constant period is selected as the reference signal, and the period is such that it is possible to measure the bending state of one recording track with sufficient precision, for example, 1.
10 or more locations are selected to be recorded on each track. In normal recording, the horizontal synchronizing signal fully satisfies this condition.

Each of the recording signals to which the reference signal has been added is sent to a modulator 64.
．． 65, amplified by recording amplifiers 62 and 65, and applied to the rotary transformer.

The outputs of the rotary transformers are respectively supplied to heads 2.3, and the signals are recorded on tape 1.

During playback, the playback signals from heads 2 and 3 are
After being amplified by preamplifiers 60 and 61 on the circuit board 23, the signal is applied to the rotary transformer 18. 'The outputs of the gate-talid transformers 18 are respectively sent to demodulators 69. '70 and input to the reproducing circuit, and the output of this demodulator 69.70 is separated into a reference signal by a reference signal extraction circuit 71.72. When the reference signal is a horizontal synchronization signal, the horizontal synchronization separation circuit in the reproduction circuit replaces 71 and 72. The output signals of the reference signal extraction circuits 71 and 72 are input to the time difference detection circuit 63, and the time difference between the reproduced reference signals is detected. There are various methods for converting the time difference into voltage, and all of them are well-known circuit techniques, so they will not be described here. The output of the time difference detection circuit 65 is applied to a subtracter 74,
Subtracted from the time difference correction value. The time difference correction value is a correction value for the reproducing head to scan the correct position.

As mentioned above, if the same head records at the same position and scans during playback, this time difference is 0, but in reality, the recording head interval and the living head interval are different, and a time lag may occur during playback. . In addition, in the case of overwriting recording as in this example, as shown in FIG. 8, the state in which the playback head is slightly shifted to the left from the time of recording is a stable state in which the playback head is just scanning the center of the recording track. It is desirable to use a time difference corresponding to this deviation as a correction value. Subtractor 7
The output of 4 is gay/! The signal is applied to the I4 adjuster 75 to determine the gain of the feedback system, and then input to the drive amplifier 76. The output of the drive amplifier 76 drives the drive coil 108 via the brush 22 and slip ring 21.

Although not shown, a preamplifier power supply voltage and an R/P switching signal are supplied to the rotation side from the slip ring and the brush.

As mentioned above, this tracking method that uses the time difference between the reference signals is not affected by fluctuations in the reproduction output of the head in principle, and does not require a special tracking signal if a horizontal synchronization signal etc. is present. This method is convenient and convenient.

Next, still another embodiment of the present invention will be described using FIG. 12. In this embodiment, unlike the example described in FIG. 2, the magnetic tape 1 is not spirally attached to the cylinder 6, but is parallel to a plane perpendicular to the rotation axis of the cylinder 6, that is, the height in the rotation axis direction is varied. 5) without winding. Head arrangement; f: ijg12 Shown at the bottom of the figure. Head 2.3 and head 4.5 are at the same position in the scanning direction, heads 2 and 5 have a step P (P: ) rack pitch), heads 4 and 5 also have a step P, but head 2. The magnetic tape S and the head 4.5 have a step height HIE: of about 1 A, which is the tape width of the magnetic tape 1. In order to maintain this level difference, the head 4.5 is attached to the surface of the leaf spring 105 opposite to the head 2.degree. 3 via a spacer 81, and the thickness of this spacer determines the level. The magnetic tape 1 runs at a constant speed, and the rotating magnetic head moving device 100 moves up or down at a rate of 1@rotation2P,
For example, the head 2.5 performs recording/reproduction during this upward movement, and the head 4.5 performs recording/reproduction during the downward movement.The tape pattern thus recorded on the magnetic tape 1 is shown in the upper part of FIG. 12. Below is 1 about the upper part of Figure 12! First, at the highest position of the movable range of the rotary magnetic head moving device 100, the head 2 forms a recording track opening and the head 3 simultaneously forms a recording track opening. Then, during a period when the head 2.5 is not scanning the tape, the head 2.5 is moved down by 2P by the rotary magnetic head moving device t100.
By scanning the tape in the next rotation, 9 recording tracks are formed in the same way, and during the period when the tape is not scanned, the head 2.5 further descends by 2P, and this process is repeated until the rotary magnetic head moving device At the lowest point in the movable range of 100, when the magnetic head 2.5 records on the recording track H, (the number of recording tracks is small to simplify the illustration, but in reality there are many), in the next rotation the head 4.5 are respectively recorded and formed. Therefore, the height difference between the head 2.3 and the head 4.5 is H. The head 4.5 is raised by 2P by the rotary abrasive head moving device during a period when the tape is not being scanned. In the next rotation, the head 4.5 forms a recording track 1, 0. Similarly, when the head 4.5 forms a recording track 1, 0 at the highest point of the rotating magnetic head moving device, in the next rotation the head 4.5 forms a recording track 1, 0. 2.5 was the record high. A force is formed, and this process is repeated.

As is clear from the figure, by setting the tape running speed to an appropriate value, the recording track A and the recording track C meet at an appropriate interval so that they do not overlap and the interval is not too large. During playback, exactly the same operation as during recording is performed. In this embodiment, similar to the example described in FIG. 8, each track is recorded overlappingly in the tape width direction, and the head track width of each head is larger than the recording track width.

Furthermore, it is obvious that the method of performing auto-tracking using the time lag in the reference signal caused by the tractor shift, which was explained in the 11th WJ, can also be applied to the police in this case. However, in this case, tracking by tape running control is irrelevant, and the time shift value is used to control the amount of movement of the rotary magnetic head moving device 91100. In the above embodiment, the rotary magnetic head moving device 100 lowers or raises the head in steps of 2P in 1111 rotations, but this changes linearly at this rate, that is, each head lowers or rises at a constant speed. It is self-evident that the 08G control signal can be used to record the signal indicating that the cylinder 6 rotational phase IC has been activated.This is reproduced during 0 playback to match the cylinder rotational phase and tape running phase with those at the time of recording. This makes it possible to reproduce the recorded signal. However, as is clear from the explanation so far, the coincidence between the rotational phase and the tape running phase need not be so strict. This is because the tape running direction and the track width direction are perpendicular to each other, so only the accuracy in the track width direction, that is, the head height, needs to be accurate, and this is maintained with high accuracy by the rattling nog method as described above. be able to.

Therefore, it is possible to control the tape running speed with less precision than in a normal VTR.

Furthermore, since the hect 2.5 and the head 4.5 perform recording and reproduction at different locations on the tape, the relative height difference (value of H) between these heads does not need to be strictly constant. When they grow older, auto-tracking is performed separately anyway, so this is not a problem.

Above two double azimuth heads 2. We have described an example using S.
．． 5. Of course, it is also possible to divide the magnetic tape into four parts in the width direction, and write and record with each double azimuth head. In this case, two double azimuth heads perform recording/reproduction while ascending, and the other two double azimuth heads perform recording/reproduction while descending.

The head arrangement and tape pattern in this case are shown in FIG.

In FIG. 13, the magnetic tape 1 is placed against the cylinder 6,
As in the previous example, it wraps horizontally as the height changes. The two double azimuth heads 2.3 and 4.5 have the same arrangement as shown in the lower diagram of FIG. Double azimuth heads 2, 5, 4.5 (!: Two double azimuth heads 2', 5', 4', 5' located at 180° opposing positions
The arrangement relationship is 2, 5, 4. Same as S. However, the heads 2 and 5 and the heads 2/ and s/ have a step H/2.

The formation order of the recording pattern on the tape is as shown below. That is, at the highest point of the rotary magnetic head moving device 100, the heads 2 and 3 each record and form a recording track asb.After the heads 2 and 3 rotate 0180°, the combined hects 1 and 5' record and form a recording track c and d, respectively.◇Scanning. After that, each head descends by 2P until the next head 2.3 scans the tape. (As mentioned above, each head may descend at a constant speed at a rate of 2P per revolution.) When the heads reach the lowest point, head 2.5 is on the recording track. ef
t head 1.5' is recording track g*h! When the recording is completed, the head 4.5 moves to the recording track 1. Then, the heads 4' and 5' form recording tracks j and k. From the time heads a/ and S/ finish scanning to the time head 4.5 finishes scanning, each head rises by 2P (as mentioned above, each head rises at a constant speed of 2P per rotation). ) When the head reaches its highest point,
Head 4.5 is recording track 1n, n, head 4', 5
When ' has finished recording the recording tracks o and p, the head 2.3 then records the recording track qer8, and subsequently the heads 2' and 5' form the recording tracks a and t. As in the previous example, it is possible to prevent these recording tracks from overlapping by setting the tape speed to an appropriate value.

By winding the magnetic tape horizontally across the cylinder numbers, the tape running system becomes an extremely simple and highly reliable running system 4C, making it possible to create a compact magnetic recording and reproducing device that is capable of high-speed tape running. [Effects of the Invention] According to the present invention, it is possible to produce a small-sized rotary magnetic head device capable of high-speed rotation, and furthermore, a device lt capable of moving the rotary magnetic head in the direction of the rotating wheel. It is possible to create a recording/reproducing device by using a rotary magnetic head that can move in the direction of a rotary wheel, which enables signal recording and precise track tracing during playback, making it possible to create a small, high-performance magnetic recording device with a small number of heads. 0 which the playback device can achieve

[Brief explanation of drawings]

1rIA is a sectional view of the rotating magnetic head device of the present invention. FIG. 2 is a diagram showing the tape running system, FIG. 3 is a view of the rotating magnetic head device viewed from above, FIG. 4 is a sectional view showing another cross section of the rotating magnetic head device, and FIG. 5 is an upper cylinder assembly. Figure W116 is an external view of the rotating magnetic head device seen from above with the upper cylinder removed, Figure 7 is an external view of the rotating magnetic head moving device, and Figure 8 is the signal to the tape. FIG. 9 is a diagram showing the recording state, FIG. 9 is a diagram showing the recording signal and recording timing, FIG. 10 is a diagram showing the running system and recording timing of another embodiment of the present invention, and FIG. 11 is a diagram showing the auto tracking of the present invention. Turns are shown in the circuit block diagram for ←-ゝ1・-a tape 2.5, 4.5-・Rotating magnetic head 8・Upper cylinder 11・Shaft 100・
...Rotating magnetic head moving device 105, 106...Plate blade 104...Seventer yoke 108...Drive coil 68...Reference signal source 6S...Time difference detection circuit Socket 2 figure 6 figure ++, Shi? 71″′ 4fu b Sanskrit 7 Diagram” Dan No. 8 Diagram 0 1 2 5 1, Stone Q @ Tehu. Kabuto 3 figure porridge figure 10 (a) (d): /X-/do 51 Otsubachi ward n (+): head 5 tobi otsu f east section power 11 figure 2 figure λ judgment he\sod layout diagram

Claims (1)

[Claims] 1. Magnetic circuit members (101, 102, 103, 104,
109, 110), two parallel leaf springs (105, 106) whose ends are fixed to these, and a drive movably supported by the two leaf springs and placed in the magnetic gap of the magnetic circuit. Rotating a rotary magnetic head moving device (100) comprising a coil (108) and a rotary magnetic head (2, 3, 4, 5) attached to a protrusion from a magnetic circuit member of a leaf spring (105). 1. A rotary magnetic head device, wherein a central axis of a rotary magnetic head moving device (100) and a central axis of rotation of the rotary magnetic head device are made to coincide with each other. 2. The leaf spring (105) has a structure in which the protrusions from the magnetic circuit member are provided at symmetrical positions with respect to the central axis of the rotary magnetic head moving device, and a rotary magnetic head is provided at each tip thereof. rotating magnetic head device. 3. The rotary magnetic head device according to claim 1, wherein the rotary magnetic head moving device (100) has a hole provided in the center, and the shaft (11) of the rotary magnetic head device is disposed in this hole. 4. The rotary magnetic head device according to claim 3, wherein the center yoke (104) is provided with a hole and the shaft (11) is fitted into the hole. 5. Two rotating magnetic heads with different azimuths are placed close to each other, and an original signal is applied to one head, and a delayed signal of the original signal is applied to the other head. A magnetic recording/reproducing device characterized by recording on a tape (1). 6. The magnetic recording and reproducing apparatus according to claim 5, wherein the rotating magnetic heads having different azimuths are mounted on a rotating magnetic head moving device (100). 7. A magnetic device characterized in that two sets of rotating magnetic heads with different azimuths are attached to the same rotating magnetic head moving device, one rotating magnetic head is used for recording and reproduction, and the other rotating magnetic head is used for monitoring. Recording and playback device. 8. Two sets of rotating magnetic heads with different azimuths are provided, one rotating magnetic head is used as a recording/reproducing head for a first recording time mode, and the other rotating magnetic head is used as a recording/reproducing head for a second recording time mode. 1. A magnetic recording/reproducing device characterized by having a configuration in which: 9. A rotating magnetic head device (6) comprising two sets of rotating magnetic heads with different azimuths arranged at an interval of 180°.
A magnetic tape is wound over 270 degrees around the tape, and the rotating magnetic head records the original signal and a delayed signal simultaneously, and these two sets of rotating magnetic heads alternately record or reproduce the signals on the tape. A magnetic recording/reproducing device characterized by having the following configuration. 10. Means (62, 63,
64, 65, 66, 67, 68), means (71, 72) for separating the reference signal from the reproduced signal, and detection means (6) for detecting the time difference between the separated reference signals.
3), and is characterized in that it has a configuration that uses this time difference to control the relative position of the recording track and the rotating magnetic head. 11. The rotating magnetic heads having different azimuths are mounted on a rotating magnetic head moving device (100), and the control circuits (74, 75, 76) control the amount of head movement by using the time difference between the detected reference signals as input. ) The magnetic recording/reproducing apparatus according to claim 10. 12. In a magnetic recording/reproducing device in which a magnetic tape (1) is wound horizontally without changing its height in the direction of the rotation axis of a rotating magnetic head device (6), two sets of mutually arranged magnetic tapes each having a step in the direction of the rotation axis are used. Rotating magnetic heads with different azimuths are arranged on the same rotating magnetic head moving device (100), and each rotating magnetic head with different azimuths records and reproduces data at separate locations divided in the width direction of the magnetic tape. A magnetic recording/reproducing device characterized in that when the rotating magnetic head moves up, one rotating magnetic head having a different azimuth performs recording and reproducing simultaneously, and when the rotating magnetic head descends, the other double azimuth head simultaneously records and reproduces. . 13. The rotary magnetic head moving device (100) is controlled by simultaneously recording reference signals using rotating magnetic heads having different azimuths and using the time difference between the reference signals during reproduction. The magnetic recording and reproducing device described above.