JP2725485B2 - Rotary magnetic head type magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary magnetic head type magnetic recording / reproducing apparatus, and more particularly to a dual-purpose machine for selectively using a plurality of types of magnetic tapes having different tape widths.

[0002]

2. Description of the Related Art In recent years, camera-integrated video tape recorders (hereinafter, "video tape recorders" are simply abbreviated to "VTRs") have become widespread.

In such a camera-integrated VTR, there are a VHS (registered trademark) and a 8 mm video using magnetic tapes having different tape widths, respectively. JP-A-63-16
No. 1559, "Magnetic recording / reproducing apparatus".

[0004] That is, in the same publication, two types of cassettes are arranged so as to face each other around a drum, and two types of leads having different lead angles are provided on the surface of the drum facing the respective cassettes. It has been proposed to provide two types of loading mechanisms that are formed and load the magnetic tape according to the two types of leads.

[0005]

However, in the prior art, since it is necessary to form two kinds of leads on the drum, there is a problem that the processing of the drum is complicated and expensive. Further, since two types of loading mechanisms are required, there is a problem that the apparatus becomes large and lacks reliability.

Therefore, an object of the present invention is to provide a new device capable of solving the above problems.

[0007]

SUMMARY OF THE INVENTION The present invention provides the following structure to solve the above problems.

In a rotary magnetic head type recording / reproducing apparatus for recording / reproducing signals on / from a plurality of types of magnetic tapes having different tape widths, a sliding contact surface which comes into sliding contact with the plurality of types of magnetic tapes and one edge thereof are in contact with each other. A drum having a single lead, and a rotary head, wherein the rotational speed of the rotary magnetic head and the traveling speed of the magnetic tape are the same among a plurality of types of magnetic tapes, and correspond to the different tape widths, respectively. The magnetic head scans the magnetic head only during this period to record and reproduce the signals on the plurality of types of magnetic tapes. When the signals are recorded on a magnetic tape with a narrow tape width, the signals are recorded on a magnetic tape with a narrow tape width. The recording is performed by compressing the time axis so that it fits on the tape, and when reproducing it, the time axis is expanded and reproduced. Apparatus.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is capable of recording and reproducing using a plurality of types of magnetic tapes having different tape widths. A wide tape is an example of a plurality of types of magnetic tapes having different tape widths. The description will be made by taking a 1/2 inch wide magnetic tape and a 1/3 inch wide magnetic tape which is a narrow tape as an example.

FIG. 1 is a view for explaining a loading completed state in the first embodiment of the present invention, and FIG.
FIG. 3 is a view for explaining another loading completed state of the inch-width magnetic tape, and FIG. 3 is a front view for explaining a relationship between the 1/2 inch-width magnetic tape wound on the drum and the 1/3 inch-width magnetic tape. FIG. 4 is a view for explaining respective tape patterns of a 1/2 inch width magnetic tape and a 1/3 inch width magnetic tape, and FIG. 5 is a view for explaining a 1/2 inch width magnetic tape wound around a drum and a 1/3 inch width magnetic tape. FIG. 6 is a plan view for explaining the relationship with a 3-inch magnetic tape, and FIG.
FIG. 7 is a block diagram of a recording / reproducing circuit system according to the second embodiment. FIG. 7 is a block diagram of a recording / reproducing circuit system according to the second embodiment.
Hereinafter, with reference to the drawings, a first embodiment relating to an analog VTR and a second embodiment relating to a device that is used as an analog VTR and a digital VTR will be described as one embodiment of the present invention. (First Embodiment) First, a loading mechanism, which is a main part of the mechanical system, will be described, and other mechanical systems such as a magnetic tape cassette transfer mechanism will not be described because a well-known mechanism is used.

In FIG. 1, 1 is a drum, 2a and 2b are first and second inclined poles, 3a and 3b are first and second vertical rollers, 4, 5 are first and second guide rollers, 6 is a guide groove, 7 is a tension arm, 8 and 9 are first and second magnetic tape pull-out members, AA and BB are first and second cassettes, aa is a 1/2 inch wide magnetic tape, and bb is 1 / 3 inch width magnetic tape, C is the drum rotation direction, D is the magnetic tape running direction.

FIG. 1A shows a half-inch width magnetic tape a.
a, the tension arm 7 and the first and second magnetic tape pull-out members 8, 9 operate as shown in the drawing, and the first arm formed integrally with the first inclined pole 2a. The vertical roller 3a and the second vertical roller 3b formed integrally with the second inclined pole 2b move while being guided by the guide groove 6 by the rotation of a loading ring mechanism (not shown), and the loading is completed. In this way, the first cassette AA
The / 2 inch wide magnetic tape aa is wound around the drum 1 rotating in the drum rotation direction C, and regulates the lower end edge of the magnetic tape while being in contact with a lead 1A described later formed on the drum 1. Guide rollers 4, 5
, And travels in the direction of the magnetic tape traveling direction D. FIG. 7B shows the completed loading state of the 1/3 inch magnetic tape bb stored in the second cassette BB.
The loading is performed by the same operation using the same loading mechanism as the above. Then, the first and second magnetic heads H1 and H2 formed so as to be opposed to the rotating drum (not shown) in the drum 1 by 180 degrees use 1/2 and 1/2.
Video signals and the like are recorded and reproduced on the 3-inch wide magnetic tapes aa and bb.

When recording / reproducing is performed using the 1/3 inch wide magnetic tape bb, guide rollers 4 for regulating the upper edge of the 1/3 inch wide magnetic tape bb are provided at the entrance side and the exit side of the drum 1. By providing each of them, the running can be stabilized.

When recording / reproducing is performed using the 1/3 inch width magnetic tape bb, the loading operation is sufficient only by winding the 1/3 inch width magnetic tape bb around the drum 1 for approximately 120 degrees as described later. Therefore, as shown in FIG. 2, the second vertical roller 3b formed integrally with the second inclined pole 2b stops in the middle of the guide groove 6, and
May be moved so as to be in contact with the 1/3 inch wide magnetic tape bb.

Then, as shown in FIG.
The lower edges of the 3-inch wide magnetic tapes aa and bb run while abutting on a lead 1A having a lead angle θ formed on the drum 1 attached to the drum base 10.

FIG. 4 shows respective tape patterns of 1/2 and 1/3 inch wide magnetic tapes aa and bb. Since the rotational speed of the drum, the lead angle, and the running speed of the magnetic tape are the same for both magnetic tapes, the track angle α of the two magnetic tapes with respect to the longitudinal direction is the same, as shown in the figure. The narrower the magnetic tape, the more the first and second magnetic heads H
Since the contact angle range of 1 and H2 is narrow, the track length of the 1/3 inch width magnetic tape bb is shorter than that of the 1/2 inch width magnetic tape.

Therefore, the effective recording / reproducing range of the magnetic tape is determined by the contact angle range of the first and second magnetic heads H1, H2, which will be described with reference to FIG. Assuming that the effective recording / reproducing range when the 1/2 inch width magnetic tape aa is used is the range of 180 degrees shown in the figure, the range of 120 degrees shown in the figure is effective for the 1/3 inch width magnetic tape bb. This is the recording / playback range. This range of 120 degrees is different from the range shown in FIG. 2, but can be realized by stopping the operation of the first vertical roller 3a integrally formed with the first inclined pole 2a. In the case of a 1/4 inch wide magnetic tape, the angle is in the range of 90 degrees shown in FIG.

Next, the recording / reproducing circuit system will be described with reference to FIG. 6. A system relating to the first magnetic head H1 will be described, and a system relating to the second magnetic head H2 will be described as the first magnetic head H1. Since the configuration is the same as that of the system according to the above, the description thereof will be omitted.

First, the recording circuit system will be described. An input video signal Vi is supplied to a recording video signal processing circuit 20 from a signal source such as a VTR (not shown).
Recording signal 2 obtained by subjecting the signal level to a constant value to AGC processing and the like, and then separating the luminance signal and the chrominance signal.
0Y and the recording color signal 20C are supplied to the FM modulation circuit 21 and the recording color signal processing circuit 22, respectively. Then, the video FM modulation signal 21 obtained by FM modulation in the FM modulation circuit 21
Y and a recording low-frequency conversion color signal 22C obtained by performing low-frequency conversion in the recording color signal processing circuit 22 are supplied to an addition circuit 23,
Here, an addition circuit output signal 23 a obtained by adding the two is supplied to a contact point 241 in the first switch circuit 24.

The first switch circuit 24 and a second switch circuit 28 which will be described later are used when a 1/2 inch wide magnetic tape aa and a 1/3 inch wide magnetic tape bb are used in a recording circuit system. Has a role to choose.

That is, when the 1/2 inch wide magnetic tape aa is selectively used, the adder circuit output signal 23a is obtained from the contact 241 in the first switch circuit 24 via the movable piece 244 via the contact 243. Adder circuit output signal 24b of 1
Is a movable piece 2 via a contact 283 in the second switch circuit.
The signal reaches the contact 281 via 84 and is supplied to the recording amplifier circuit 29 as the second switch circuit output signal 28a.

On the other hand, when the 1 / 3-inch wide magnetic tape bb is selectively used, the second output signal 23a obtained from the contact 241 in the first switch circuit via the contact 242 via the movable piece 244 is used. The adder output signal 24a of
The signal is supplied to the first A / D conversion circuit 25. Then, the first A / D conversion circuit output signal 25a obtained by analog-to-digital conversion is supplied to a time axis compression circuit 26 having a RAM as a main part. The time axis compression circuit 26 uses the first A
The / D conversion circuit output signal 25a is temporarily stored in the RAM in units of one field period, and during a period corresponding to the above-described effective recording range (120 degrees), is 1.5 times the write clock frequency used for storage. A time axis compression circuit output signal 26a read from the RAM using a read clock having a frequency is supplied to a first D / A circuit 27. The first D / A circuit output signal 27a obtained by digital-to-analog conversion is supplied to the contact 282 in the second switch circuit and transmitted to the contact 281 via the movable piece 284. The second switch circuit output signal 28a is supplied to the recording amplifier circuit 29.

In this manner, the recording process can be performed by selectively using the 1/2 inch wide magnetic tape aa and the 1/3 inch wide magnetic tape bb.

A recording / reproduction switching switch circuit for switching and selecting between a recording circuit system and a reproduction circuit system is provided by a recording amplification circuit output signal 29a obtained by amplifying the second switch circuit output signal 28a in the recording amplification circuit 29. Contact 402 in 40
Supplied to Then, the contact 40 via the movable piece 404
1 is supplied to the first magnetic head H1 via a rotary transformer (not shown). Then, the first magnetic head H1 is ２ ，, 1 /
The recording signal 40a is recorded on the 3-inch wide magnetic tapes aa and bb.

Next, the reproduction circuit system will be described.
A reproduction signal 40b reproduced from the 1/2, 1/3 inch wide magnetic tapes aa, bb is supplied to a contact 401 in the recording / reproduction switch circuit 40 via a rotary transformer (not shown).
, And a reproduction amplifier circuit input signal 30 b obtained by being transmitted to the contact point 403 via the movable piece 404, is supplied to the reproduction amplifier circuit 30. Then, after being amplified here, it is supplied to a contact 311 in the third switch circuit 31 as a reproduction amplification circuit output signal 30a.

The third switch circuit 31 and a fourth switch circuit 35, which will be described later, select between using a 1/2 inch wide magnetic tape aa and using a 1/3 inch wide magnetic tape bb in a reproducing circuit system. Has a role.

That is, when a 1/2 inch wide magnetic tape aa is selectively used, the reproduction circuit output signal 30a is obtained from the contact 311 in the third switch circuit 31 via the contact 313 via the movable piece 314. 1 playback circuit output signal 31b
Passes through the contact 353 of the fourth switch circuit 35, reaches the contact 351 via the movable piece 354, and is supplied to the separation circuit 36 described later as a fourth switch circuit output signal 35a.

On the other hand, when the 1 / 3-inch wide magnetic tape bb is selectively used, the reproduction circuit output signal 30a is obtained from the contact 311 in the third switch circuit through the contact 312 via the movable piece 314. The reproduction circuit output signal 31a of
The signal is supplied to the second A / D conversion circuit 32. Then, the second A / D conversion circuit output signal 32a obtained by analog-to-digital conversion is supplied to the time axis expansion circuit 33 having a RAM as a main part. The time axis decompression circuit 33 performs an operation reverse to that of the time axis compression circuit 26 described above.
Of the A / D conversion circuit output signal 32a, the write clock having the same frequency as the read clock used in the time axis compression circuit 26 during the period corresponding to the effective recording range (120 degrees) described above. And temporarily stored in a RAM, and read out from the RAM using a read clock having the same frequency as the frequency of the write clock used in the time axis compression circuit 26 in the unit of one field period. Circuit output signal 33
a is supplied to the second D / A circuit 34. The second D / A circuit output signal 34a obtained by the digital-to-analog conversion is supplied to the contact 352 in the fourth switch circuit 35 and transmitted to the contact 351 via the movable piece 353. The fourth switch circuit output signal 35a is supplied to the separation circuit 36.

In this manner, the reproducing process can be performed by selectively using the 1/2 inch wide magnetic tape aa and the 1/3 inch wide magnetic tape bb.

Then, in the separation circuit 36, the fourth switch circuit output signal 35a is low-frequency-converted with the first separation circuit output signal 36Y concerning the video FM modulation signal 21Y, and the recorded low-frequency conversion is recorded. The frequency is separated into a second separation circuit output signal 36C related to the color signal 22C. The first separation circuit output signal 36Y is output from the FM demodulation circuit 3
The reproduction luminance signal 37Y obtained by the FM demodulation is supplied to the reproduction video signal processing circuit 39. On the other hand, the second separation circuit output signal 36C is supplied to the reproduction color signal processing circuit 38, where the reproduction color signal 38C obtained by high-frequency conversion is supplied to the reproduction video signal processing circuit 39. The reproduced video signal processing circuit 39 outputs the reproduced luminance signal 37Y.
And the reproduction color signal 38C are mixed and supplied as an output video signal Vo to a television monitor (not shown).

In this manner, a recording / reproducing circuit system capable of recording / reproducing by selectively using the 1/2 inch width magnetic tape aa and the 1/3 inch width magnetic tape bb can be realized. (Second Embodiment) In the above-described first embodiment, an analog VTR has been described as an example, but the present invention is not limited to the form of signals recorded on a magnetic tape.
The present invention is also applied to a combined use machine of a digital VTR and an analog VTR.

That is, the second embodiment to be described below is １ ／
When an inch-width magnetic tape aa (wide magnetic tape) is used, it is used as an analog VTR, and when a 1 / 3-inch wide magnetic tape bb (narrow magnetic tape) is used, it is used as a digital VTR. Since the mechanism system is the same as that of the first embodiment, the same components are denoted by the same reference numerals, and the description thereof will be omitted. The recording / reproducing circuit system will be described.

In describing the second embodiment with reference to FIG. 7, the same components are denoted by the same reference numerals and description thereof will be omitted. Here, the difference from the first embodiment is that the first and fourth switch circuits 24 and 35 are provided at the earliest and last input / output stages, respectively, and that the digital recording / reproducing block D surrounded by a dotted line is provided.
R and DP are provided in place of the above-described compression / expansion block mainly including the time axis compression / expansion circuits 26 and 33.

First, the recording circuit system will be described. When the input video signal Vi is a 1/2 inch wide magnetic tape aa, the input video signal Vi is processed by the first switch circuit 24 for recording video signal processing. The signal is transmitted to the circuit 20 and subjected to a predetermined recording process described in detail in the first embodiment to obtain an addition circuit output signal 23a. On the other hand, 1/3 inch wide magnetic tape b
When selecting and using b, the input video signal Vi is supplied to the digital recording block DR.

The input video signal Vi is converted from analog to digital by the A / D conversion circuit 50 in the digital recording block DR to become an A / D conversion circuit output signal 50a, which is supplied to the error correction code adding circuit 51. ,here,
After the error correction code and the synchronization signal generated based on the A / D conversion circuit output signal 50a are added, they are supplied to the modulation circuit 52 as an error correction code addition circuit output signal 51a.

Then, after a well-known digital modulation is performed by the modulation circuit 52, the data is temporarily stored in the RAM in units of one field period, and during the period corresponding to the above-described effective recording range (120 degrees), the data is stored during the storage. The modulation circuit output signal 52a is read from the RAM using a read clock having a frequency 1.5 times the used write clock frequency.
And supplies it to the recording equalization circuit 53. And
A recording equalization circuit output signal 53a obtained by performing well-known recording equalization so as to compensate in advance for a peak shift occurring in magnetic recording and reproduction by the recording equalization circuit 53 is supplied to the second switch circuit. .

Thus, the second switch circuit 28
The middle contact 282 is supplied with the recording equalization circuit output signal 53a and the contact 283 is supplied with the addition circuit output signal 23a. When the 1/3 inch wide magnetic tape bb is selectively used, the former is 1/2. When the inch-width magnetic tape aa is selectively used, the latter is transmitted to each of the contacts 281 via the movable piece 284 and then supplied to the recording amplifier circuit 29 as a second switch circuit output signal 28a.

Next, the reproduction circuit system will be described. A reproduction amplifier circuit output signal 30a is a half-inch wide magnetic tape a.
When a is selectively used, the output signal 30a of the reproduction amplifier circuit is transmitted to the separation circuit 36 by the third switch circuit 31,
A predetermined reproduction process similar to that described in detail in the first embodiment is performed to obtain a reproduced video signal processing circuit output signal 39a. On the other hand, when the 1/3 inch wide magnetic tape bb is selectively used, the reproduction amplifier circuit output signal 30a is supplied to the digital reproduction block DP.

The output signal 30a of the reproduction amplifier circuit is
The signal is supplied to the reproduction equalization circuit 54 in the digital reproduction block DP, and the reproduction equalization circuit output signal 54 b obtained by performing the peak shift correction accompanying the magnetic recording / reproduction is supplied to the demodulation circuit 55. Then, the clock is reproduced by the demodulation circuit 55, and the data at the discrimination point is determined using the reproduced clock obtained by the clock reproduction. The demodulation circuit output signal 55a obtained in this manner is supplied to a jitter absorption memory 56 having a RAM as a main part, where the jitter is absorbed and the signal compressed by the modulation circuit 52 is converted into a time axis before compression. The output signal 56a of the jitter absorption memory obtained by the expansion is supplied to the error correction / correction circuit 57.

The error correction / correction circuit 57 corrects the error using the error correction code added by the error correction code addition circuit 51 and the synchronizing signal, and makes necessary corrections such as the correlation of the video signal. , An error correction / correction circuit output signal 57a is obtained and supplied to the D / A conversion circuit 58. Then, the D / A conversion circuit 58 supplies the D / A conversion circuit output signal 58 a that has been digital-to-analog converted to the fourth switch circuit 35.

Accordingly, the D / A conversion circuit output signal 58a is supplied to the contact 352 in the fourth switch circuit 35, and the reproduced video signal processing circuit output signal 3 is supplied to the contact 283.
9a is supplied, and when the １ ／ inch wide magnetic tape bb is selected and used, the former is used via the movable piece 354 to make contact with the contact 351 when the １ ／ inch wide magnetic tape aa is selected and used.
, And an output video signal Vo can be obtained.

As described above, when the 1/2 inch wide magnetic tape aa is selectively used, the analog VTR is set to 1
When the す る inch wide magnetic tape bb is selectively used, a combined machine that can be selectively used as a digital VTR can be provided.

In the above-described embodiment, 1/2, 1
When the 使用 inch wide magnetic tapes aa and bb are selectively used, the description has been made on the assumption that the rotational speed of the drum, the lead angle, and the magnetic tape traveling speed are the same for both magnetic tapes. However, the present invention is not limited to this. Without, for example, 1/2,
When the 1 / 3-inch wide magnetic tapes aa and bb are selectively used for analog recording and reproduction and digital recording and reproduction, the rotational speed of the drum in digital recording and reproduction is set to 2.5 times that of analog recording and reproduction, and 2. Of course, digital recording / reproducing may be performed using a track pattern having five tracks and having a track angle different from that of analog recording / reproducing.

In the above-described embodiment, 1/2, 1
Although the effective recording / reproducing ranges in the case of selectively using the / 3 inch width magnetic tapes aa and bb are described as 180 degrees and 120 degrees, respectively, the present invention is not limited to this.
For example, 1 commonly used in a camera-integrated VTR, etc.
Of course, the present invention can be applied to a tape wound by 240 degrees with a / 2 inch tape width, and an effective recording / reproducing angle range that is proportional to the tape width of the magnetic tape may be used.

In the above-described embodiment, a description has been given of the dual-purpose machine capable of selectively using the 1 / 2-inch wide magnetic tape aa and the 1 / 3-inch wide magnetic tape bb. However, the present invention is not limited to this. It goes without saying that a multi-purpose machine that can selectively use magnetic tapes having three or more tape widths may be used.

It should be noted that, in the above-described second embodiment, 1/2
When an inch-width magnetic tape aa (wide magnetic tape) is selected and used, it is used as an analog VTR and 1/3.
When the inch-width magnetic tape bb (narrow magnetic tape) is selected and used, the case of using it as a digital VTR has been described as an example. However, when the 1/2 inch-width magnetic tape aa (wide magnetic tape) is selectively used. , 1st, 2nd, 3rd
The movable pieces 244, 284, 314, 354 in the fourth switch circuits 24, 28, 31, 35 are connected to the contacts 242, 28.
2, 312, and 352, and the same frequency is set for the read clock and the write clock of the RAM provided in the modulation circuit 52 and the jitter absorption memory 56, so that any magnetic tape can be used. Can be used as a digital VTR.

In the second embodiment, the A / D
Without directly connecting the conversion circuit 50 and the error correction addition circuit 51, a video signal bit compression circuit for performing band compression such as ADPCM is inserted between them, and the error correction correction circuit 57 and the D / A conversion are connected. Of course, without directly connecting the circuit 58, a video signal bit expansion circuit for expanding the band of the signal band-compressed by the video signal bit compression circuit may be inserted between them.

According to the above-described embodiment, a plurality of types of cassettes can be arranged at overlapping positions without arranging two types of cassettes opposing each other around the drum. There is an effect that can be.

According to the above-described embodiment, since the magnetic tapes having a plurality of tape widths abut on the same lead, it is not necessary to form a plurality of types of leads, and the processing of the drum is simplified. is there.

According to the above-described embodiment, since the magnetic tape having a plurality of tape widths can be loaded on the drum by the same loading mechanism, the size of the apparatus can be reduced and the reliability can be improved. There is.

According to the embodiment described above, the analog VTR
And a digital VTR, it is possible to provide a dual-purpose machine that does not depend on the type of signal to be recorded / reproduced (analog signal, digital signal), and a plurality of types of magnetic tapes recorded by the dual-purpose machine and having different standards. Has the effect of having compatibility compatible with devices that conform to the respective standards, as well as compatibility capable of reproducing magnetic tapes recorded with the devices conforming to the respective standards using the above-mentioned dual-purpose device.

[0052]

As described above, according to the configuration of the present invention,
Since the magnetic tapes having a plurality of tape widths are in contact with the same lead, it is not necessary to form a plurality of types of leads, and there is an effect that the processing of the drum is simplified. In addition, since the same loading mechanism can load a magnetic tape having a plurality of tape widths onto the drum, the size of the apparatus can be reduced and the reliability can be improved. In addition, a single device can record a plurality of types of magnetic tapes having different standards, and the recorded plurality of types of magnetic tapes have the effect of having compatibility compatible with devices having the respective standards. is there. In addition, there is an effect that a magnetic tape recorded by a device having each standard is compatible with a device according to the present invention so that it can be reproduced.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a loading completed state according to an embodiment of the present invention.

FIG. 2 is a view for explaining another loading completed state of a 1/3 inch width magnetic tape.

FIG. 3 is a front view for explaining a relationship between a 1/2 inch width magnetic tape and a 1/3 inch width magnetic tape wound around a drum;

FIG. 4 is a diagram for explaining respective tape patterns of a 1/2 inch width magnetic tape and a 1/3 inch width magnetic tape.

FIG. 5 is a plan view for explaining a relationship between a 1/2 inch width magnetic tape and a 1/3 inch width magnetic tape wound around a drum.

FIG. 6 is a block diagram of a recording / reproducing circuit system according to the first embodiment.

FIG. 7 is a block diagram of a recording / reproducing circuit system according to a second embodiment.

[Explanation of symbols]

 1 Drum 1A Lead 26 Time axis compression circuit 33 Time axis expansion circuit 52 Modulation circuit 56 Jitter absorption memory aa 1/2 inch width magnetic tape bb 1/3 inch width magnetic tape α Track angle

Claims (1)

(57) [Claims] 1. A rotary magnetic head type recording / reproducing apparatus for recording / reproducing a signal on / from a plurality of types of magnetic tapes having different tape widths, wherein a sliding contact surface with which the plurality of types of magnetic tapes are in sliding contact and one edge thereof are respectively provided. A drum with a single reed abutting;
A rotating head, wherein the rotating speed of the rotating magnetic head and the running speed of the magnetic tape are the same among a plurality of types of magnetic tapes, and the magnetic head is scanned only during a period corresponding to each of the different tape widths. The signals are recorded and reproduced on the plurality of types of magnetic tape, respectively.When the signals are recorded on a magnetic tape having a small tape width, the signals are recorded by compressing the time axis so that the signals can be accommodated on the magnetic tape having a small tape width. And a rotating magnetic head type magnetic recording / reproducing apparatus characterized in that when reproducing it, the time axis is extended and reproduced.