JPS62107452A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To load smoothly a tape without moving a cylinder by providing tape leads with different tilt angles to upper/lower fixed cylinders respectively and winding different magnetic tapes along the lower side face in the broadwise direction. CONSTITUTION:The titled device consists of the upper/lower fixed cylinders 1, 3, a cylinder 2 for rotary head having a magnetic head 4, upper/lower tape leads 5, 6, a beta-Max system tape 7 and a VHS system tape 8. In applying recording/reproduction by the VHS tape 8, the tape is mounted on the cylinder 1 along the lead 5, and since the diameter of the cylinder 1 is larger than the standard value of the VHS system, the tape winding angle is selected to be 151 deg. smaller than 180 deg. of the beta-Max system. Thus, the tape with different formats of plural kinds is used with simple constitution without moving the cylinder.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a device that uses a single rotation head to record and reproduce information on magnetic tapes of different tape formats, and in particular,
This invention relates to a magnetic recording and reproducing device that can be used in common with home VTRs, f3mms videos, or DATs (digital audio tape recorders).

[Background of the invention]

As a magnetic recording and reproducing device that records and reproduces signals on cassette tapes with two or more different tape formats, for example, VH8 (product end) and βmax ( There is a system in which each tape format (trade name) uses a magnetic tape (hereinafter simply referred to as tape) in common for recording and reproduction. In this system, the cylinder in which the rotary head and tape lead are installed has two types of cylinder diameters and tape leads that correspond to each tape format, so the cylinder can be moved up and down according to the installation of the cassette tube. This has the disadvantage of requiring a complicated configuration.

[Purpose of the invention]

An object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to enable a magnetic recording and reproducing bag f that can be smoothly loaded with a tape without moving the cylinder in accordance with the tape capacity.
K is to provide.

[Summary of the invention]

In order to achieve this object, the present invention provides two fixed cylinders, upper and lower, for a medium cylinder to which a one-rotation head is attached, and two types of upper and lower cylinders are provided corresponding to the first and second two types of tape formats. Each type of tape is provided with a tape lead having an inclination of
The other type of tape is characterized by having the upper side of the tape in the width direction aligned with the tape lead of the upper cylinder, making it possible to use the middle cylinder for the rotating head for two types of tape. is.

[Embodiments of the invention]

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

FIG. 1 is a top view and side view of a rotary cylinder portion showing a first embodiment of a magnetic recording/reproducing apparatus according to the present invention, and is an example of a case in which a β system tape and a VH8 system tape are used in common. 1 is a fixed upper cylinder, 2 is a middle cylinder for a rotating head, 3 is a fixed lower cylinder, 4 is a magnetic head (hereinafter simply referred to as head), and 5 is a cylinder cut into the upper cylinder. Tape lead, 6 is a tape lead cut into the lower cylinder, 7 is the first tape, β-max type tape (hereinafter simply referred to as β tape), 8 is the second tape, VH8 type tape (below.

(referred to as single KVHS tape).

If you are busy with the same figure and want to record/play back on β tape 7, (
As shown in BLK, attach the tape along the cheek reed on the lower cylinder 5. ? By setting the diameter of the cylinder 3 to 74.5 mmψ, which is the standard value for the β method,
The angle of the tape is approximately 1800. The angle between the rotation locus of the head 40 and the tape lead 6 is approximately 5°.

Next, when recording and playing back on VHS tape 8.

Attach the tape along the tape lead of the upper cylinder 1. The diameter of the upper cylinder 1 is 74.5 mm as described above.
ψ), which is the quasi-value of the VH3H3 method, 6 2 m
Therefore, as shown in Figure 1), the angle of the tape should be made smaller to about 151° than in the case of the β method, so that the signal recorded on the tape would conform to the Chiagua format. . Rotation trajectory of head 4 and tape lead 105
The angle between the two is about 6 degrees.

In addition, the tape is attached to a tape guide (not shown) K according to its type (cassette size), and the cylinder (
1 to 3) are not moved.

In addition, since the head azimuth differs depending on the tape format, two head azimuths are provided for each, for a total of four.

The rotation speed of the cylinder is the same at 1800 rpm.

As mentioned above, when using a VHS tape, the angle of the tape winding changes from the standard 180° to 151°, so the two-head system does not provide a continuous signal. Therefore,
The signal processing device is provided with a time axis compression circuit for recording and a time axis expansion circuit for playback. Such a circuit can be easily realized by applying digital television signal processing that digitizes video signals.

FIG. 2 is a top view and Cb) side view of a rotating cylinder portion showing a second embodiment of the magnetic recording/reproducing device according to the present invention, in which a first tape, a VHS tape, and a second tape are shown. A digital audio tape recorder (D
This is an example of a case where a tape A'I') is shared. Here, the DAT is a tape recorder for recording and reproducing PCM audio, and in particular, as described in Japanese Patent Application Laid-Open No. 59-162606, the DAT is a tape recorder that uses a rotary head and a tape like a VTR. , which attempts to record and reproduce PCM audio is called 1R-DAT.

Prior to explaining FIG. 2, a brief explanation will be given of FIGS. 3 and 4 regarding the above R-DATE.

Figure 3 is a top view of the rotating cylinder part of R-DAT,
The figure is a diagram explaining the tape format of R-DAT, and 11 is an R-DAT tape, 12 is a cylinder exclusively for R-DAT, 15 is a rotary head, and 14 is a recording track.

In FIG. 3, the standard R-DAT cylinder 12 has a diameter of 50 mm, and the head 13 is attached to the cylinder 12.
Two pieces are placed 80 degrees apart. The angle of the tape 11 is approximately 90°. The width of the tape 11 is approximately 3.8 mm,
The angle θ (track angle) between the recording track 14 and the tape 11 is approximately &4°, and the rotation speed of the cylinder 12 is 2000 r.
It is pm.

Also, since the head contact of R-DAT is 90 degrees x 2 for one rotation of 360 degrees, the time axis of the signal is compressed twice on the tape, and the data time is 50X, tb in one hour. are recorded.

Now, returning to FIG. 2, a second embodiment of the magnetic recording/reproducing apparatus according to the present invention will be described. In the figure, 9 is a tape lead for VH3, 10 is a tape lead for R-DAT,
11 is a tape for R-DAT, and the same reference numerals as in FIG. 1 indicate the same parts.

The diameter of the cylinder 1 is 62 mm ψ, which is the VH8 standard.

First, when recording and playing back on VHS tape 8.

As shown in To), the tape is attached along the tape lead 9 of the lower cylinder 3. The tape wrap around the corner is approximately 18
It becomes 0°. The angle between the rotation locus of the head 4 and the tape lead 9 is approximately 6°.

Next, when recording and playing back on the R-DAT tape 11,
A tape 11 is attached along the tape lead 10 of the upper cylinder 1. To make the tape format the same as that shown in FIG. to °.

When using R-DAT tape, the angle of the tape 110 winding is changed from 90° to 44°, so the signal compression rate is approximately 4 times that of a 2-head system, and about 4 times that of the conventional one when a 4-head system is used. The compression rate is almost the same, twice as much. The cylinder rotation speed at this time is 2000 rpm. Sara K
, 4 heads and a rotational speed of 1100 Orp, the compression ratio is approximately the same as the conventional one.

Two embodiments have been described above, but in addition to these, there are eight embodiments.
It goes without saying that the present invention can also be applied to common use of mmVTR and VH8, βmax, R-DAT, etc.

The present invention requires high precision and does not require moving the cylinder part with a complicated mechanism, and simply slightly shifts the guide etc. to wind the tape, and smoothly attaches the tape to the tape lead corresponding to the input tape. be able to.

〔Effect of the invention〕

As explained above, according to one aspect of the present invention, a simple structure is provided without moving the cylinder.

It is possible to share a plurality of types of tapes of different formats, and it is possible to provide a magnetic recording and reproducing device with excellent functions, except for the drawbacks of the prior art described above.

[Brief explanation of drawings]

FIG. 1 is a top view to a side view of a rotary cylinder portion showing a first embodiment of a magnetic recording/reproducing device according to the present invention, and a second
The figures are (a+top view+bl side view, third
The figure is R-DA'! 'Top view of rotating cylinder part, 4th
The figure is a diagram explaining the tape format of R-DAT. 1... Upper cylinder, 2... Middle cylinder, 3... Lower cylinder, 4... Magnetic head, 5, 6, 9.10...
・Tape read, 7.8.11...Magnetic tape, 12
... Cylinder, 13... Magnetic head, 14... Recording track.

Claims (1)

[Claims] In a magnetic recording and reproducing apparatus, the magnetic recording and reproducing apparatus includes at least a middle cylinder having a rotating magnetic head, and a fixed upper cylinder and a lower cylinder, and records and reproduces signals by winding a magnetic tape around the rotating magnetic head, The lower cylinder is provided with a first tape lead that guides the first magnetic tape along the lower surface in the width direction at a first inclination angle, and the fixed upper cylinder is provided with a first tape lead that guides the first magnetic tape along the lower surface in the width direction. A magnetic recording and reproducing device characterized in that it is configured to be capable of recording and reproducing using magnetic tapes of different tape formats by providing a second tape lead guided along the upper side surface in the width direction at a second inclination angle. Device.