JP2671442B2 - Magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a rotary magnetic head device equipped with a rotary magnetic head, wherein a magnetic tape is wound around a tape guide drum and then run. The present invention relates to a helical scan type magnetic recording / reproducing apparatus for recording / reproducing information signals such as audio signals by making relative sliding contact.

B. SUMMARY OF THE INVENTION The present invention is a rotary magnetic head device equipped with a rotary magnetic head, a magnetic tape is wound around a tape guide drum and run, and a relative sliding contact between the rotary magnetic head and the magnetic tape is achieved so that a voice signal, etc. In a helical scan type magnetic recording / reproducing apparatus for recording / reproducing information signals of, the winding angle of the magnetic tape with respect to the tape guide drum during high speed running is smaller than the winding angle during constant speed running, and the magnetic head is rotated by the rotating magnetic head rather than the magnetic tape. By winding the information signal at a winding angle at which the information signal can be read, damage to the magnetic tape is reduced and high-speed search of the information signal recorded on the magnetic tape is possible.

C. Conventional technology Conventionally, a magnetic tape is wound around a tape guide drum of a rotary magnetic head device equipped with a rotary magnetic head and is run, and the rotary magnetic head and the magnetic tape are relatively slidably contacted with each other to produce an audio signal or a video signal. 2. Description of the Related Art A helical scan type magnetic recording / reproducing apparatus for recording / reproducing information signals such as is widely used.

As a magnetic recording / reproducing apparatus of this type, a magnetic tape 1 is run with a tape running system as shown in FIG. 6, and a relative sliding contact between the magnetic tape 1 and the rotary magnetic head of the rotary magnetic head device 2 is achieved. There is known one configured to record and reproduce information signals such as signals and video signals. In the magnetic recording / reproducing apparatus shown in FIG. 6, a rotary magnetic head device 2 having a rotary magnetic head is arranged so as to face the magnetic tape pull-out surface side of a tape cassette 3 mounted at a predetermined tape cassette device position. There is. Further, the magnetic tapes 1 which are respectively located on both sides of the rotary magnetic head device 2 and wound between the tape supply reel 4 and the tape take-up reel 5 in the tape cassette 3 are pulled out from the inside of the tape cassette 3. The tape guide drum 6 of the rotary magnetic head device 2 is provided with first and second tape loading blocks 7 and 8 which are wound around a predetermined angle range. These first and second tape loading blocks 7 and 8 include a guide roller 9 and an inclined guide pin 10.
It is operated by a tape loading mechanism (not shown) over a range from the magnetic tape pull-out surface side of the tape cassette 3 to the front side position of the rotary magnetic head device 2 shown in FIG.

In this magnetic recording / reproducing apparatus, when the recording / reproducing operation mode is selected, the tape loading mechanism operates, and the first and second tape loading blocks 7 and 8 are moved by the tape loading mechanism. The magnetic tape 1 is pulled out from the tape cassette 3 by the operation of moving the first and second tape loading blocks 7 and 8. By moving the first and second tape loading blocks 7 and 8 to the final movement position shown in FIG. 6, the magnetic tape 1 is moved to the tape guide drum 6 of the rotary magnetic head device 2 at a predetermined angle. The tape is loaded in a predetermined tape path as shown in FIG. 6 which is spirally wound and runs over a range, for example, a range of about 180 °. In the state of being loaded in the tape path shown in FIG. 6, the magnetic tape 1 is sandwiched between the capstan 11 and the pinch roller 12 arranged between the rotary magnetic head device 2 and the tape take-up reel 5, and the tape The vehicle is run at a constant speed in the direction in which it is taken up by the take-up reel 5. In this constant speed running state, the magnetic tape 1 is brought into relative sliding contact with the rotary magnetic head, and a video signal is recorded on a recording track formed with a predetermined inclination angle over the entire width direction of the tape, or The video signal recorded on the recording track is reproduced.

In addition, the magnetic tape 1 is attached to the tape path as shown in FIG.
Is loaded, the sliding contact with the full-width erasing head 13 arranged between the tape supply reel 4 and the rotary magnetic head device 2 is achieved, and it is arranged between the rotary magnetic head device 2 and the tape take-up reel 5. The sliding contact with the audio signal and control signal recording / reproducing head 14 is achieved.

By the way, when the magnetic tape 1 is run at a speed higher than the constant speed running while the magnetic tape 1 is still loaded in the tape path as shown in FIG. 6, damage to the magnetic tape 1 is caused. Is large and easily damaged. Therefore, when the rewind mode or the fast-forward operation mode for operating the magnetic tape 1 at high speed is selected, the first and second tape loading blocks are selected.
7, 8 is moved to the initial position located on the tape cassette 3 side, as shown in FIG. The magnetic tape 1 is pulled into the tape cassette 3 side from the tape path shown in FIG. 6 capable of recording / reproducing information signals, so that the tape is run in the so-called unloading state.

As described above, when the magnetic tape 1 is run in the unloading state in the high speed running operation mode of the magnetic tape 1, the magnetic tape 1 is slidably contacted with the voice signal / control signal recording / reproducing head 14. The control signal recorded on the magnetic tape 1 cannot be reproduced because it is released.

Therefore, even in the high-speed running operation mode of the magnetic tape 1, the desired recording track recorded on the magnetic tape 1 is searched for by making a sliding contact between the magnetic tape 1 and the audio signal / control signal recording / reproducing head 14. There are things that I try to do. This magnetic recording / reproducing apparatus moves the first tape loading block 7 located on the inlet side of the rotary magnetic head device 2 to the initial position as shown by the phantom line in FIG. Then, the second tape loading block 8 is moved to a slightly intermediate position so that the winding of the magnetic tape 1 around the tape guide drum 6 is released and the magnetic tape 1 is slightly contacted. The tape path on the side is set to be substantially the same as the tape loading state.
The magnetic tape 1 is slidably contacted with the audio signal / control signal recording / reproducing head 14 to enable reproduction of the control signal recorded on the magnetic tape 1.

Further, in both the constant speed running operation mode and the high speed running operation mode of the magnetic tape 1, the running of the magnetic tape 1 in the tape loading state while the magnetic tape 1 is wound around the tape guide drum 2 is performed. It is also known to be configured to do. In this magnetic recording / reproducing apparatus, a folding guide 15 and a tilt guide are provided on a loading ring (not shown) that rotates around the outer circumference of the rotary magnetic head device 2.
16 and other plural tape guides 17 are arranged, the magnetic tape 1 is pulled out from the tape cassette 3 by the rotation of the loading ring, and is wound around the tape guide drum 2, as shown in FIG. As described above, the tape is loaded onto the tape guide drum 2 so that the tape path has an inverted U shape.

D. Problem to be Solved by the Invention In the magnetic recording / reproducing apparatus configured as shown in FIG. 6 described above, the magnetic tape 1 is fixed in the high speed running operation mode of the magnetic tape 1 as described above. Since no sliding contact is made with any magnetic head including the arranged audio signal and control signal recording / reproducing head 14, it is not possible to reproduce any information signal recorded on the magnetic tape 1.

Further, in the magnetic recording / reproducing apparatus configured as shown in FIG. 8, the magnetic tape 1 and the audio signal / control signal recording / reproducing head 14 can be brought into sliding contact with each other. It is possible to reproduce the control signal recorded in series along the longitudinal direction of
Since the rotary magnetic head arranged in the rotary magnetic head device 2 and the magnetic tape 1 are not slidably contacted with each other, reproduction of an information signal recorded on a recording track formed by being inclined to the magnetic tape 1 is reproduced. Can't do.

Further, in the magnetic recording / reproducing apparatus configured as shown in FIG. 9, the magnetic tape 1 is loaded in a predetermined tape path even in the high speed running operation mode of the magnetic tape 1. Therefore, the sliding contact between the magnetic tape 1 and the rotary magnetic head can be achieved, and the information signal recorded on the recording track formed by being inclined with respect to the magnetic tape 1 can be reproduced. However, magnetic tape 1
Considering the damage given to the tape, there is a limit to the tape speed in the high-speed running operation mode, and it is not possible to achieve ultra-high speed tape running.

Therefore, the present invention makes it possible to read the information signal recorded on the magnetic tape by at least the rotary magnetic head even in the high speed running operation mode of the magnetic tape, and at a higher speed without damaging the magnetic tape. The present invention has been proposed for the purpose of providing a magnetic recording / reproducing apparatus capable of running a magnetic tape.

E. Means for Solving the Problem In order to achieve the above-mentioned object, a magnetic recording / reproducing apparatus according to the present invention is a tape guide drum on which a magnetic tape is wound and pulled out from a tape cassette, and the tape guide drum. A rotary magnetic head device having a rotary magnetic head for recording an information signal on a magnetic tape wound around a plurality of slanted tracks or for reading the recorded information signal, and an inlet of the magnetic tape to a tape guide drum. And a second position which is disposed on each side of the tape cassette and the outlet side and which enters the recess formed in the tape cassette, and a second position where the magnetic tape is pulled out from the tape cassette and wound around the tape guide drum over the first winding angle. And a tape loading mechanism having first and second tape pull-out portions that move between the first and second tape pull-out portions. The feeding portion moves from the first position to the second position when the magnetic tape is running at a constant speed and winds the magnetic tape pulled out from the tape cassette around the tape guide drum. And the tape pull-out portion located on the inlet side of the second tape pull-out portion is moved to a position intermediate between the first and second positions, and the magnetic tape pulled out from the tape cassette is transferred to the tape guide drum on the first side. 1
The winding angle is smaller than the winding angle, and the second winding angle is such that the information signal can be read from the magnetic tape by the rotary magnetic head.

F. Action In the magnetic recording / reproducing apparatus according to the present invention, when the magnetic tape is running at a constant speed, the first and second tape pull-out portions tape the magnetic tape from the first position where the magnetic tape can be pulled out from the tape cassette. It moves to the second position where it is wound around the guide drum, and when the magnetic tape runs at high speed,
Of the tape pull-out portion of the magnetic tape, which is located on the entrance side of the magnetic tape with respect to the tape guide drum, moves to a position intermediate between the first and second positions, and the magnetic tape is run at a high speed at this position. The information signal recorded on the tape is searched.

G. Examples Hereinafter, specific examples of the present invention will be described with reference to the drawings.

FIG. 1 shows an example in which the present invention is applied to a digital audio tape recorder in which an audio signal is pulse coded and recorded on a magnetic tape.

The tape recorder shown in FIG. 1 and FIG. 2 has a rotary magnetic head provided with a rotary magnetic head in close proximity to the magnetic tape pull-out surface side of a tape cassette 21 mounted in a cassette mounting portion formed in the main body of the tape recorder. A head device 22 is arranged.

Tape cassette 21 to be attached to this tape recorder 21
The magnetic tape 26 is wound and accommodated between the tape supply reel 24 and the tape take-up reel 25 which are rotatably supported in the cassette half 23. A front lid 27 is rotatably attached to the magnetic tape pull-out surface side for pulling the magnetic tape 26 outside the cassette half 23 so that the pull-out surface can be opened and closed. Further cassette half 23
As shown in FIG. 2, a closing plate 29 that opens and closes a reel shaft insertion hole through which a reel shaft 28 that engages with the tape supply reel 24 and the tape take-up reel 25 respectively is slidable on the bottom side of the. Installed. This tape cassette
21, the front lid 27 is rotated to open the tape withdrawing surface side of the cassette half 23 to allow the magnetic tape 26 to be withdrawn, and the closing plate 29 is slid to open the reel shaft insertion hole to open each tape reel 24. , 25 are engaged with the reel shaft 28, and are mounted on a predetermined cassette mounting portion.

The rotary magnetic head device 22 is constructed by mounting two rotary magnetic heads in a tape guide drum 30 around which the magnetic tape 26 is spirally wound in a range of approximately 180 degrees in the constant speed traveling operation mode. There is. This rotating magnetic head device 22
Is the tape cassette installed in the tape cassette installation section.
It is arranged at a position extremely close to the front edge of the cassette half 23 of 21, and at a position closer to the tape supply reel 24 side from the center of the tape cassette 21 in the lateral width direction. The rotary magnetic head device 22 is arranged in the tape recorder main body in a state of being inclined at a predetermined angle with respect to the mounting plane of the tape cassette 21. That is, as shown in FIG. 2, the rotary magnetic recording / reproducing apparatus head device 22 is arranged so as to be inclined so as to enter the tape cassette 21.

Then, the tape cassette 21 is moved along the lateral position of the rotary magnetic head device 22 from the tape cassette mounting position side.
There are provided first and second tape loading blocks, which are first and second tape pull-out portions forming a tape loading mechanism for winding the magnetic tape 26 from the inside and winding it around the tape guide drum 30. These first and second tape loading blocks 31 and 32 include a moving base 33,
A pair of inclined guide pins 35 and 36 and guide rollers 37 and 38 are erected on the 34, respectively. The first tape loading block 31 is arranged at the entrance side of the magnetic tape 26 with respect to the tape guide drum 30, and the second tape loading block 32 withdraws the magnetic tape 26 from the tape guide drum 30. It is located at the outlet side.

The first and second tape loading blocks 31,3
Reference numeral 2 denotes a first position shown in FIG. 3 which has entered a loading mechanism entrance recess 39 formed on the front surface side of the cassette half 23 of the tape cassette 21 mounted at the tape cassette mounting position by a tape loading mechanism (not shown). From the magnetic tape 26 to the tape guide drum 30 as shown in FIG.
In addition, it is movable along the loci L ₁ and L ₂ as shown in FIG. 1 over the second position where the winding operation is performed over the angle range of about 180 degrees which is the first winding angle range. ing.

Further, in the tape loading state shown in FIG.
During the tape path on the entrance side of the magnetic tape 26 to the rotary magnetic head device 22 reaching the tape loading block 31, the movable guide roller 42, the tape tension control guide roller 41, the fixed inclined guide 43 and the fixed guide roller 44.
Are arranged. By providing the fixed tilt guide 43 and the fixed guide roller 44, the tape guide drum 30
The first tape loading block that guides the magnetic tape 26 so that the magnetic tape 26 is tilted in a spiral shape so as to be wound.
The winding angle of the magnetic tape 26 with respect to the inclined guide pin 35 provided on the 31 is made small.

Further, in the loading state shown in FIG. 1, the cassette half is removed from the second tape loading block 32.
Rotating magnetic head device reaching tape take-up reel 24 in 23
A capstan 45, a pinch roller 46 that presses the capstan 45 and feeds the magnetic tape 26 at a constant speed, and a rotation guide roller 47 are disposed in the tape path on the exit side of the magnetic tape 26 with respect to 22. The tension control guide roller 42 and the rotation guide roller 47 are rotated to follow the loading operation of the magnetic tape 26 and move from the tape cassette 21 side into the tape path. Further, the pinch roller 46 is operated to rotate from the tape cassette 21 side to a position close to the capstan 46 following the loading operation of the magnetic tape 26, and the magnetic tape 26 is run at a constant speed. When is selected, the capstan 46 is pressed and the magnetic tape 26 is fed at a constant speed.

By the way, when the tape recorder is placed in an unloading state in which the magnetic tape 26 is not loaded during a predetermined tape pass, the first and second tape loading blocks 31, 32 cause the tapes to move as shown in FIG. It is in a state of being moved to the first position facing the loading mechanism entrance recess 39 formed on the front surface side of the cassette half 23 of the tape cassette 21 mounted in the cassette mounting position. At this time, the inclined guide pins 35, 36 and the guide rollers 37, 38 of the magnetic tape 26 extending along the front surface side of the cassette half 23 when the tape cassette 21 is mounted at the tape cassette mounting position. Faced to face the back side. Further, the movable roller 42, the pinch roller 46, and the rotation guide roller 47 are also moved to a position facing the inside of the loading mechanism entrance recess 39 on the front side of the cassette half 23.

When the tape cassette 21 is mounted in the tape cassette mounting position and the tape loading mechanism is started in the unloading state shown in FIG. 3, the first and second tape loading blocks 31 and 32 are inclined guide pins. The magnetic tape 26 is pulled over the 35, 36 and the guide rollers 37, 38 while being drawn out from the cassette half 23, and is moved along the loci L ₁ , L ₂ as shown in FIG. It is moved to the second position and positioned in this second position. At this time, the tape tension control guide roller 42, the pinch roller 46, and the rotation guide roller
47 is also moved from the position shown in the loading mechanism entrance recess 39 shown in FIG. 3 to the position located in the tape path in the tape loading state shown in FIG. When the first and second loading blocks 31 and 32 are moved in this manner, the magnetic tape 26 is wound around the tape guide drum 30 over an angular range of about 180 degrees as shown in FIG. The tape is wound in the first winding angle range and is loaded in the tape path in which constant speed running is performed.

In the loaded state as shown in FIG. 1, the magnetic tape 26 is guided in a state in which it can run without contacting the guide rollers 50, 51 provided in the cassette half 23. In this way, the magnetic tape 26 is not contacted with the guide rollers 50, 51 in the cassette half 23.
By running the tape, high-precision tape running is guaranteed.

The magnetic tape 26 during the tape path as shown in FIG.
When the recording and / or reproducing operation mode is selected in the state of loading, the pinch roller 47 rotated to a position facing and close to the capstan 46 presses the capstan 46 and holds the magnetic tape 26. The magnetic tape 26 is fed at a constant speed in the direction of arrow A in FIG. When the magnetic tape 26 is fed at a constant speed, the rotary magnetic head and the magnetic tape 26 are in relative sliding contact with each other with a predetermined inclination angle over the entire width of the magnetic tape 26. By the relative sliding contact between the rotary magnetic head and the magnetic tape 26, an information signal such as a pulse coded audio signal is recorded, or the information signal recorded on the magnetic tape 26 is reproduced.

Further, a fast-forward operation mode for running the magnetic tape 26 at a higher speed than in the constant speed running operation mode, a winding operation mode, a high-speed search mode for selecting desired recording information recorded on the magnetic tape 26, etc. are selected. Then, the first tape loading block 31, as shown in FIG.
A second position shown in FIG. 1 for operating the magnetic tape 26 around the tape guide drum 30 in a first winding angle range in which the magnetic tape 26 is wound over an angle range of approximately 180 degrees, and a loading mechanism for the cassette half 23. It is moved to an intermediate position located between the first position shown in FIG. Also, as shown in FIG. 4, the movable roller 42 also moves to the position shown in FIG. 1 where the magnetic tape 26 is pulled out during the tape pass in the constant speed running operation mode and the loading mechanism entry recess 39 of the cassette half 23. It is moved to an intermediate position with respect to the position shown in FIG. At this time, the second tape loading block 32 is in the second position.

In the state shown in FIG. 4 in which the first tape loading block 31 has been moved to the intermediate position between the first position and the second position as described above, the magnetic tape 26 is approximately 116 mm relative to the tape guide drum 30. It is wound over an angular range of degrees. This winding angle range is smaller than the winding angle in the constant speed running operation mode described above, but the relative sliding contact between the rotary magnetic head and the magnetic tape 26 is achieved, and the information recorded on the magnetic tape is recorded. The signal can be read.

By the way, in a digital audio tape recorder, a recording track (T) formed on the magnetic tape 26.
Is constructed as shown in FIG. That is, a main data block (Md) in which a pulse-coded audio signal is recorded is formed in the center of the recording track (T),
Subcode blocks (Sub) are formed at both ends of the main data block (Md), in which control signals such as a start signal of a song and a signal indicating the song number are recorded as pulse-coded subcodes. It In such a digital audio tape recorder that pulse-codes and records the information signal including the control signal, even if the winding angle is smaller than the winding angle in the constant speed running operation mode, the rotary magnetic head and the magnetic tape 26 are Relative sliding contact is achieved, and if either one of the sub-code blocks (Sub) formed at both ends of the recording track (T) can be reproduced, the start signal of the song in the high-speed traveling operation mode, It is possible to realize a search function for detecting a signal or the like indicating a song number.

Therefore, according to the digital audio tape recorder of the present invention, high-speed search can be realized by using the rotary magnetic head.

Further, according to the present invention, the tape path on the exit side of the tape guide drum 30 is the same in the constant speed running operation mode and the high speed running operation mode. It is also possible to provide a fixed head for recording / reproducing a control signal such as a signal indicating a song number and reproduce the control signal by the fixed head in the high-speed traveling operation mode to realize a search function.

In the above embodiments, the digital audio tape recorder for recording the audio signal has been described, but the present invention can be applied to a magnetic recording / reproducing apparatus for recording / reproducing a video signal and the like.

H. Effects of the Invention As described above, the magnetic recording / reproducing apparatus according to the present invention is
When the magnetic tape is running at a constant speed, the first and second tape pull-out portions wind the magnetic tape around the first winding angle from the first position where the magnetic tape can be pulled out from the tape cassette. Move to the second position to rotate,
During high-speed running of the magnetic tape, the tape pull-out portion of the first and second tape pull-out portions located on the magnetic tape entrance side of the tape guide drum moves to a position intermediate between the first and second positions, The magnetic tape pulled out from the tape cassette is wound around the tape guide drum over a second winding angle at which the information signal can be read by the rotary magnetic head at an angle smaller than the first winding angle. Since the magnetic tape is rotated, the information such as the music recorded on the magnetic tape can be searched while the magnetic tape is running at high speed without damaging the magnetic tape.

Further, since the switching of the magnetic tape to the high speed running is performed only by controlling the moving position of the tape pull-out portion located on the entrance side of the magnetic tape with respect to the tape guide drum, it is necessary to configure the high speed running mode of the magnetic tape. Since no new parts are required, the structure of the device itself can be simplified.

[Brief description of the drawings]

FIG. 1 shows a magnetic recording / reproducing apparatus according to the present invention, and is a plan view showing a state in which a magnetic tape is loaded in a tape path in a constant speed running operation mode, and FIG. 2 shows the magnetic recording / reproducing apparatus. FIG. 4 is a side view, FIG. 3 is a plan view of the magnetic recording / reproducing apparatus in an unloading state, and FIG.
FIG. 5 is a plan view in a high speed running operation mode in which the first tape loading block is moved to an intermediate position between the first position and the second position, and FIG. 5 is a recording formed by the magnetic recording / reproducing apparatus. It is a schematic diagram which shows the structure of a track. FIG. 6 shows a conventional magnetic recording / reproducing apparatus,
FIG. 8 is a plan view showing a state in which the magnetic tape is loaded in the tape path in the constant speed running operation mode, and FIG. 7 is a plan view when the magnetic recording / reproducing apparatus is set in the high speed running operation mode of the magnetic tape; Is a plan view showing another conventional magnetic recording / reproducing apparatus, and FIG. 9 is a plan view showing still another conventional magnetic recording / reproducing apparatus. 21 …… Tape cassette 22 …… Rotary magnetic head device 26 …… Magnetic tape 30 …… Tape guide drum 31 …… First tape loading block 32 …… Second tape loading block 35,36 …… Inclined guide pin 37 , 38 …… Guide roller

Claims (1)

(57) [Claims] 1. A tape guide drum on which a magnetic tape is wound and which is pulled out from a tape cassette, and an information signal is recorded on a magnetic tape wound on the tape guide drum so as to form a plurality of inclined tracks, or A rotary magnetic head device having a rotary magnetic head for reading a recorded information signal, and a first position which is arranged at an entrance side and an exit side of the magnetic tape with respect to the tape guide drum and which enters a recess formed in a tape cassette. And a tape loading mechanism having first and second tape pull-out portions for moving a magnetic tape from the tape cassette and winding the magnetic tape around the tape guide drum over a first winding angle. And the first and second tape pull-out portions are arranged to move from the first position to the second position when the magnetic tape is running at a constant speed. The magnetic tape pulled out from the tape cassette and wound around the tape guide drum, and when the magnetic tape is traveling at a high speed, the tape pull-out portion located on the inlet side of the first and second tape pull-out portions is the above-mentioned. The magnetic tape, which is moved to an intermediate position between the first and second positions and pulled out from the tape cassette, is wound on the tape guide drum at an angle smaller than the first winding angle and by the rotary magnetic head from the magnetic tape. A magnetic recording / reproducing device characterized in that the magnetic recording / reproducing device is configured to be wound over a second winding angle at which an information signal can be read.