JPS6032906B2 - magnetic recording and reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording/reproducing device, and its purpose is to rotate a flexible magnetic recording medium and record/reproduce a signal thereon using a magnetic head. The present invention aims to provide a device that can increase the recording density and speed up the search for recorded recording tracks.

In magnetic recording and reproducing devices that record and reproduce signals by rotating a flexible magnetic recording medium, such as a magnetic sheet, at a constant speed and placing a magnetic head in contact with the magnetic sheet, the recording density is increasing as the amount of information increases. Improvement is required.

In order to meet this requirement, conventionally a plurality of magnetic heads have been used or a magnetic head moving mechanism has been provided. Fifth
7 shows a conventional example using a plurality of magnetic heads. The magnetic head 1 is placed on a rotary table 24, rotated at a constant speed by a motor 25, and the magnetic heads 26, 27,
28, 29 are brought into contact with the magnetic sheet 1 to record and reproduce signals. In this case, the magnetic sheet 1 generates standing waves 30, 31 by contact with the magnetic heads 26, 27, 28, 29 , 32, and 33 are generated, and as shown in FIG. 5, the magnetic head 26 cannot obtain stable contact pressure with the magnetic sheet 1 due to the standing wave 30, and the reproduction output fluctuates or is attenuated. Ta. Note that the reference numeral 34 is a fixture for fixing the magnetic sheet 1. Furthermore, the amount of vibration of the magnetic sheet 1 increases due to the standing waves 30, 31, 32, and 33, which tends to shorten the life of the magnetic sheet. When multiple magnetic heads are fixed and used in this way, there is an effect of standing waves due to the contact between the magnetic head and the magnetic sheet, making it difficult to contact the magnetic head and the magnetic sheet, making it difficult to improve the recording density. I couldn't hope for it. In addition, when a magnetic head moving mechanism is provided, the magnetic head is moved in a horizontal direction with respect to the rotating direction of the magnetic sheet with the magnetic head in contact with the magnetic sheet, so an extremely unreasonable force is applied to the magnetic sheet during movement. In addition, the magnetic sheet was easily scratched and its lifespan tended to be shortened. or,
Unless the accuracy of the side of the mobile device is very high, tracking errors are likely to occur during playback, and the time required to search from the innermost track to the outermost track is slow, the cost is high, and the structure of the device is complicated, making it difficult to use in practice. It wasn't suitable. The present invention focuses on the above-mentioned problems and solves them, and the structure thereof will be explained according to the embodiments shown in the drawings.

, FIG. 1 is a front view showing the magnetic recording and reproducing apparatus of the present invention,
Magnetic recording It is made to be playable.

1 is a movable magnetic recording body such as a magnetic sheet, which is arranged on a back plate 2 so as to be maintained at a constant height;
It is attached to a fixture 3 and rotated at a constant speed by a motor 4.

Reference numerals 5 and 6 denote a pair of hexagonal rotating bodies connected by a rotating shaft 7, one end of which is supported by a bearing 8, and the other end connected to a pulse motor 10 via a rotation transmission pick-up 9. A pair of hexagonal rotating bodies are supported so as to be substantially parallel to each other to constitute a magnetic head holding device.

2 and 3 are detailed views of the magnetic head holding device, in which six magnetic heads 11 are mounted on one side of the hexagonal rotating body 5 and a magnetic head 12 is mounted on the next side. Magnetic heads 11, 12, 13, 14, 15, 16 on each side
are installed via magnetic head holders 23 so as to be located approximately at the center of each side surface and at equal intervals in the direction of the rotation axis. Similarly, magnetic heads 17, 18, 19, 20, 21, and 22 are arranged on the rotating body 6, and magnetic heads 11, 12, 13, 14, 15, and 16 are arranged so as not to trace the tracks during recording and reproduction. (For example, the magnetic head 13 connects the magnetic head 18, and the magnetic head 1
41) so as not to trace the track of the magnetic head 17 (see FIG. 4). Since the device of the present invention has the above-described configuration, in the case of recording, when the magnetic sheet 1 is rotated at a constant speed by the motor 4, the magnetic head 13 is activated on the rotating body 5, and the magnetic head is activated on the rotating body 6. 2
Since the magnetic sheet 2 is in contact with the magnetic sheet 1, recording can be performed (
Figure 1).

Next, when the pulse motor 10 is rotated by 60 degrees when the magnetic heads 13 and 22 have finished recording, the hexagonal rotating body 5
, 6 are rotated by 60 degrees, and the magnetic head 12 in the rotating body 5 is
In the rotating body 6, the magnetic head 21 comes into contact with the magnetic sheet 1 to perform recording. As above, set pulse motor 0 to 6
By rotating the magnetic sheets 1 through 360 degrees at a time, all of the magnetic heads 11 to 22 arranged on the pair of hexagonal rotating bodies 5 and 6 are rotated through the magnetic sheet 1 as shown in FIG.
It can be recorded above. In addition, in the case of reproduction, for example, in order to reproduce recording tracks 11 and 17 in FIG. 4, recording tracks 11 and 17 can be easily reproduced by rotating the pulse motor 10 by 120° from the state in FIG. 1. That's why. As mentioned above, during recording and reproduction, only two magnetic heads are always in contact with the magnetic sheet, and the position is 18.
Since the magnetic head moves in the same direction as the rotating direction of the magnetic sheet at the time of contact and separation, no unreasonable force is applied to the magnetic sheet and the influence of standing waves is almost eliminated. In the specific example of the present invention, a case has been described in which a pair of hexagonal rotating bodies are provided with 6 magnetic heads each for a total of 12 recordings on a magnetic sheet, but the number of magnetic heads may be increased according to the recording density. I can do it.

Further, in the embodiments, a hexagonal rotating body is described as an example of a polygonal column, but similar effects can be expected even if other polygonal or cylindrical shapes are used. Further, in an embodiment of the present invention,
Although we have shown an example of arranging the heads so that the track trajectories drawn by multiple magnetic heads do not overlap, this is not limiting. They may be arranged so that they are drawn.

As described above, in the device of the present invention, the plurality of magnetic heads arranged with a rotating body can perform recording and reproduction by the rotation of the rotating body, so compared to conventional devices, tracking accuracy can be obtained more easily. In addition, the search speed is faster than before, and even though multiple magnetic heads are used for recording and reproducing, the influence of standing waves caused by the support of the magnetic head and magnetic sheet on other heads is hardly considered. Since there is no need to do this, the corresponding amount of each magnetic head and magnetic sheet can be easily obtained in the same way as in the case of a magnetic head. Furthermore, since the magnetic head moves in the same direction as the rotational direction of the magnetic sheet when it engages with and separates from the magnetic sheet, no undue force is applied to the magnetic sheet, extending the life of the magnetic sheet. The number of magnetic heads attached to a rotating body can be easily changed, a recording density several to several tens of times higher than conventional methods can be obtained with a small-diameter magnetic sheet, the device structure is simple, and the cost is low. It has the effect of

[Brief explanation of drawings]

FIG. 1 is a front view of the magnetic recording and reproducing apparatus of the present invention, FIG. 2 is an enlarged front view of the magnetic head holding device, FIG. 3 is a side view of the same, FIG. 4 is a plan view showing the magnetic sheet recording state, and FIG. The figure is a plan view of a conventional magnetic recording/reproducing device, FIG. 6 is a front view of the same, and FIG.
The figure is an enlarged sectional view showing the state of contact between the magnetic sheet and the magnetic head. 1...Fixable magnetic recording body, 3...Fixed sleeve, 5, 6...
... Rotating body, 7 ... Rotating shaft, 11 to 16, 17
~22...Magnetic head. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Scope of Claims] 1. A magnetic recording and reproducing apparatus that rotates a flexible magnetic recording body and uses a plurality of magnetic heads on the flexible magnetic recording body to record and reproduce signals, A magnetic head holding device in which a rotating body having a rotating shaft is provided so as to cross the surface of a magnetic recording medium in a state substantially parallel to the surface of the magnetic recording medium, and a plurality of magnetic heads are provided on the surface of this rotating body so as to be offset in the axial direction of the rotating body. A magnetic recording/reproducing device characterized by comprising: 2 As a rotating body that crosses the surface of the flexible magnetic recording body in a substantially parallel state, the rotation axis of the rotating body crosses over a fixing jig that rotationally drives the flexible magnetic recording body and is symmetrical about the center of rotation. A magnetic recording and reproducing apparatus according to claim 1, further comprising a pair of magnetic head holding devices. 3. As a rotating body, a pair of polygonal prisms having a rotation axis are used, and a plurality of magnetic heads are provided so as to be located at the center of the side surface of each polygonal prism, and each magnetic head is arranged at equal intervals in the direction of the rotation axis. A magnetic recording and reproducing apparatus according to claim 1.