JP2798824B2 - Tape winding device for 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 tape winding device for a magnetic recording / reproducing apparatus, and more particularly to a functional configuration for preventing a sudden change in the tension of a tape in a tape winding apparatus for a magnetic recording / reproducing apparatus.

[0002]

2. Description of the Related Art At present, many magnetic recording / reproducing apparatuses for recording information by magnetizing a magnetic record carrier and reading and outputting information from the magnetic record carrier have been commercialized.
Some of these use a magnetic tape formed by applying a magnetic substance on a thin film as a magnetic recording carrier, and the tape winding of a magnetic recording / reproducing apparatus using this magnetic tape as a magnetic recording carrier. In the apparatus, the tape speed can be set so that the tape runs at a high speed for fast-forwarding and rewinding, in addition to the tape running speed at the time of reproducing or recording. However, as described above, the running speed of the tape at the time of fast-forward or rewind is high, and the magnetic tape may be damaged due to a sudden change in speed. To prevent this, FIG. Such a tape tension stabilizing device 10 is installed in a tape winding device to mechanically control the tape tension.

The tape tension stabilizing device 10 includes an arm 11, a stopper pin 13 provided on the arm 11, and a spring 15 for urging the arm 11 in a predetermined direction.
And is composed of The stop pin 13 has a magnetic
The tape 20 can be hung.
Is rotatable in the direction of a or b around part A
Supported. The part B of the arm is wound with tape.
Reel disc that engages with the attached reel hub (not shown)
Can be in contact with the outer periphery of the hook 17.

In the tape tension stabilizing device 10 configured as described above, when the tape is mounted on the magnetic recording / reproducing device, when the tape runs in the direction c,
If the tape tension increases, the arm 11
It rotates in the direction of a around the part. At this time, arm 1
The B portion of 1 deviates from the outer periphery of the reel disk 17
Direction, the contact pressure is weakened, and as a result,
Since the tape disk 17 can rotate freely,
Hoop tension will be weakened. Conversely,
When the tension is reduced, the arm 11
As a result, it rotates in the direction of b around the portion A. This and
B portion of the arm 11
Strong contact will cause brakes on the reel disc
Take it. Therefore, the tape tension increases
Become. If the tape runs in the opposite direction,
A similar device mounted on the other reel disk
Control the options. In this way the tape tension
Is controlled mechanically.

[0005] However, the movement of the arm 11 as described above is generally vibration. That is, when the running speed of the magnetic tape 20 changes abruptly, the tape tension instantaneously increases, but immediately thereafter, the tape tension stabilizing device 10 suddenly reduces the tape tension. Become. However, tape tension
The tape tension increases rapidly because
The operation of the stabilizer 10 is also rapid, and the reel disc
Brake comes off and the tape tension drops. That
For this reason, the tape tension stabilizing device 10
Work to raise the competition. In this way,
By repeatedly increasing and decreasing the tape tension, the tape tension converges to a constant value. Then, the time until the tape tension converges to a certain value, that is, the time during which the tape running speed is unstable due to repeated increase and decrease of the tape tension, is such that the change in the running speed of the magnetic tape 20 is abrupt. , The degree of the unstable state during the above time increases as the change in the running speed of the magnetic tape 20 becomes steeper. An example of such a state is shown in FIG. 5, and in such a state, it can be seen that hunting has occurred in the arm 11 of the tape tension stabilizer 10.

The hunting as described above occurs because the running speed of the magnetic tape 20 changes suddenly. In order to prevent this, the change in the running speed of the magnetic tape 20 is gradually reduced. Invention has been made.

FIG. 6 shows an example of a conventional invention in which such a change in the running speed of the magnetic tape 20 is moderated, and shows a start-up sequence of a drive motor at the time of fast forward or rewind. The upper row shows the speed of the tape. The servo mode of the drive motor includes a STOP mode, an SP 5 × speed mode in the FG control process, and a CTL control process. The motor voltage (displayed as Motor-V) has two stages of 12V and 18V. As shown in FIG.
At the beginning of fast forward or rewind, the tape is accelerated to run at 5 times the speed of the SP mode, then the drive motor voltage is increased and the servo mode is switched to CTL control at the same time.
Accelerates to the set tape maximum speed. FG
The control is a control method of controlling the motor rotation speed by reading a pulse signal generated by the rotation of the motor, for example, by magnetizing the rotation axis of the motor for running the magnetic tape 20, and detecting the rotation speed of the motor. Say. The CTL control means that the CTL signal recorded on the magnetic tape 20 is read to detect the traveling speed of the magnetic tape 20,
Control method for controlling the traveling speed of the vehicle. The SP mode refers to a mode in which a constant traveling speed of the magnetic tape 20 during recording and reproduction is performed.

[0008]

In the conventional startup sequence of the fast-forward / rewind drive motor, the hunting of the tape tension stabilizing device 10 is large during the tape acceleration immediately after the start of the fast-forward / rewind operation, and the operation is stable. It took time to do it. This is particularly likely to occur when the tension regulator hunts when the tape tension suddenly increases, that is, when the tape is suddenly accelerated. Further, if hunting occurs, there is a problem that the tape tension varies greatly, and the CTL head cannot read the CTL signal, or the tape runs on the flange of each pin of the traveling system, causing a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and a tape winding device of a magnetic recording / reproducing apparatus does not cause an abrupt increase in tape tension at the time of starting fast forward or rewind. The purpose is to.

[0010]

In order to solve the above-mentioned problems, in a tape winding device of a magnetic recording / reproducing apparatus according to the present invention, a tape drive motor sequence at the time of fast-forward / rewind is used for fast-forward or rewind. At the time of rewinding, the tape is taken up at a low speed until the slack of the tape is removed, the operation of the tension regulator is stabilized, and the tape tension becomes constant, and then fast forward and rewind are performed at a high speed. In the sequence of the tape drive motor at the time of fast-forward / rewind according to the present invention, after the above-described tape winding operation, the tape is sequentially accelerated to the set maximum speed in several stages.

That is, an FG control mechanism having a tape tension stabilizing device for mechanically controlling the tape tension using a spring or the like, detecting the rotation speed of the motor for running the tape, and controlling the rotation speed of the motor; and a CTL control mechanism for controlling the running of the tape by detecting the tape running speed of the tape winding apparatus of a magnetic recording and reproducing apparatus and a low-speed mode and the constant speed mode the FG control mechanism at the time of reproduction, the FG control mechanism, wherein Ri taken up the tape at a constant multiple of the running speed of the motor speed in the slow mode and the constant speed mode, low speed running speed of the motor
Te by winding the tape while stepwise control in
The slack and keep the tape tension constant.
FG control step and the CTL control mechanism
Following your step, by winding the tape by switching the rotational speed of the motor stepwise, CTL system for winding the tape at high speed while controlling the rotation speed of the motor
Characterized in that it comprises a control step.

[0012] The device may be a machine using a spring or the like.
Tape tension stability that controls tape tension
Device to detect the rotation speed of the motor that runs the tape.
An FG control mechanism for controlling the rotation speed of the motor
CT that detects tape running speed and controls tape running
L control mechanism, wherein the FG control mechanism is
Magnetic recording / reproducing apparatus having low speed mode and constant speed mode
Of the magnetic tape in the tape winding device
When performing rewinding, the FG control mechanism
Constant multiple of the tape running speed in normal mode and constant speed mode
Tape running speed by winding the tape at the running speed
FG control for controlling the degree stepwise, and the CTL control mechanism
Changes the rotation speed of the motor step by step
CTL control to control motor rotation speed while winding
Control means switching means for switching between CTL control and CTL control
Motor rotation speed at which the mechanism switches the rotation speed of the motor
And a tape running speed switching means including a degree switching control means.
The FG control is used to perform stepwise low-speed control
Loosen the tape and keep the tape tension constant.
To take up the tape at low speed, and then to CTL control
Fast forward and rewind are performed at higher speed . Furthermore, in addition to this, the tape running speed switching means, the motor control means dividing the acceleration of the tape fast forward-winding in two or more stages, characterized in containing Mukoto.

[0013]

In the tape winding device of the magnetic recording and reproducing apparatus of the present invention configured as described above, when the magnetic tape is fast-forwarded or rewound, (1) in the FG control step, the low-speed mode And by winding the magnetic tape at a running speed that is a constant multiple of the motor running speed in the constant speed mode, the magnetic tape is wound while the running speed of the motor is controlled. (2) In the CTL control step, By rotating the motor in a stepwise manner and winding the tape, the magnetic tape is wound while the rotation speed of the motor is controlled.

Thus, when the magnetic tape is fast-forwarded or rewound, the slack of the magnetic tape is removed, and the magnetic tape is wound at a low speed until the tape tension becomes constant. Fast-forward / rewind. In the tape winding device of the magnetic recording / reproducing apparatus according to the present invention, when the magnetic tape is fast-forwarded or rewound, the control mechanism switching means of the tape traveling speed switching means controls the FG control mechanism and C.
The TL control mechanism is switched, and the motor rotation speed is switched while the CTL control is maintained by the motor rotation speed switching control means of the tape running speed switching means.

Thus, when the magnetic tape is fast-forwarded or rewound, slack of the magnetic tape is removed, and the magnetic tape is wound at a low speed until the tape tension becomes constant. Fast-forward / rewind. In this way, the tape is wound at a lower speed than in the conventional case before the tape is accelerated for fast-forward / rewind, so that a sharp increase in the tape tension can be prevented, and hunting of the tension regulator is reduced. You. In addition, since the operation of the tension regulator stabilizes and the tape winding operation is continued at a low speed until the tape tension becomes constant, it prevents a sudden increase in the tape tension during subsequent acceleration and enables stable fast-forward and rewind. Becomes In other words, fast-forward tape
When rewinding, the tape is accelerated in several stages after the low-speed winding operation, so the tape tension increases more smoothly than in the conventional sequence, so the hunting of the tension stabilizing device is reduced and stable Fast forward and rewind are possible.

[0016]

FIG. 1 is a diagram showing a preferred embodiment of the present invention, in which a tape speed and a drive motor acceleration sequence at the time of starting fast forward or rewind are shown.

The drive motor according to the present embodiment includes STOP,
FG and CTL servo modes are provided, and in this embodiment, two stages of FG servo, that is, EP1
Two stages of double speed and SP5 speed are provided. Also, the drive motor voltage (indicated as Motor-V in FIG. 1) has two stages of 12V and 20V.

FIG. 2 shows a system diagram of the present invention.

As shown in FIG. 2, the tape winding device of the magnetic recording / reproducing apparatus according to the present embodiment comprises a controller 30, a control mechanism switching means 32 connected to the controller 30, and a motor drive voltage. Switching means (motor rotation speed switching control means) 34;
Control means 36 connected to the drive motor 3
8, CTL control means 40, and FG control means 42. The tape winding device of the magnetic recording / reproducing apparatus according to the present embodiment is a tape tension stabilizing device 10
(Hereinafter referred to as a tension regulator), but since this is the same as before,
It is omitted here.

In the tape winding device of the magnetic recording / reproducing apparatus according to the present embodiment configured as described above, the drive motor 38 is controlled by the motor drive voltage switching means 34, the CTL control means 40, and the FG control means 42. The Rukoto.

When the drive motor 38 is under FG control, the switch in the control mechanism switching means 32 is switched to the side 32a. Then, by detecting the rotation axis of the magnetized drive motor 38, the rotation speed of the drive motor 38 is detected, and based on the detected speed, the rotation speed of the drive motor 38 is controlled and installed in the apparatus. The running speed of the magnetic tape 20 is controlled. At this time, the rotation drive voltage of the drive motor 38 is kept at 12 V, and in this state, the speed is switched from 1 × EP speed to 5 × SP speed (parts and parts in FIG. 1). When the drive motor 38 is subjected to the CTL control, the switch is switched to the side 32b in the control mechanism switching means 32, and the traveling speed of the magnetic tape 20 is detected by detecting the CTL signal recorded on the magnetic tape 20. Is controlled. At this time, the rotation drive voltage of the drive motor 38 is switched from 12 V to 20 V halfway by switching a switch provided in the motor drive voltage switching means 34 (part in FIG. 1). And part). Thus, finally, the magnetic tape 2
The running speed of 0 can be increased to the maximum speed of the tape, that is, about 300 to 400 times the normal running speed.

FIG. 3 is a flowchart showing the operation of the tape winding device of the magnetic recording / reproducing apparatus according to this embodiment.

Here, the operation of the tape winding device of the magnetic recording / reproducing apparatus according to the present embodiment in accordance with FIG. 1 will be described in detail with reference to FIG. In the startup sequence, the part
The control is switched to (S101), and the initial slack of the magnetic tape 20 is removed at the tape speed in the EP mode (S1).
02), the magnetic tape 20 is wound at a constant speed until the tension regulator stabilizes and the tape tension becomes constant (S103). Then, in the next part, the traveling speed of the magnetic tape 20 is accelerated to 5 times the speed of the SP mode (S104), and here, similarly to the case of S103,
At this stage, the operation of the tension regulator is stabilized, and the magnetic tape 20 is wound at a constant speed until the tape tension becomes constant (S105). Further, in the section, the servo mode of the drive motor 38 is switched from FG servo to CTL servo (S106), and further in the section, the rotational drive voltage of the drive motor 38 is switched from 12V to 20V by the motor drive voltage switching means 34. Then, the acceleration of the drive motor 38 is increased to the set maximum tape speed by increasing the voltage of the drive motor 38 (S107).

In the sequence of the drive motor according to the present embodiment set as described above, the tape is wound at a lower speed than in the conventional case before the tape is accelerated for fast-forward / rewind. A sudden increase can be prevented, and hunting of the tension regulator is reduced. Also, the operation of the tension regulator is stable,
Since the tape winding operation is continued at a low speed until the tape tension becomes constant, a sharp increase in the tape tension during subsequent acceleration can be prevented, and stable fast-forward / rewind can be performed.

In the above-described embodiment, the initial low-speed tape winding operation is set at 1 × speed of the EP mode. However, the same effect can be obtained even at other tape speeds.

Further, the sequence for dividing the acceleration of the tape speed into three stages, the servo mode at each stage and the tape speed are not limited to those in the above embodiment. Needless to say, the same effect can be obtained even if the acceleration divided into three stages is four or more. Also, the rotational drive voltage of the drive motor
However, the present invention is not limited to the above embodiment.

[0027]

Since the present invention is constructed as described above, the tape is accelerated in several stages after a low-speed winding operation when the tape is fast-forwarded and rewound. Is increased more smoothly than the conventional sequence, hunting of the tension stabilizer is reduced, and fast forward / rewind can be performed stably.

[Brief description of the drawings]

FIG. 1 is a diagram showing a sequence of a tape drive motor according to a preferred embodiment of the present invention.

FIG. 2 is a block diagram showing a functional configuration of a tape drive motor according to a preferred embodiment of the present invention.

FIG. 3 is a flowchart illustrating an operation of the tape winding device of the magnetic recording / reproducing apparatus according to the embodiment.

FIG. 4 is a diagram showing a sequence of a conventional drive motor.

FIG. 5 is a diagram showing a configuration of a tape tension stabilizing device (tension regulator).

FIG. 6 is a diagram illustrating a state of tape tension during hunting.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Tape tension stabilizer (tension regulator) 20 Magnetic tape 30 Controller 32 Control mechanism switching means 34 Motor drive voltage switching means (Motor rotation speed switching control means) 36 Servo control means 38 Drive motor 40 CTL control means 42 FG control means

Claims (3)

(57) [Claims] An FG control mechanism that has a tape tension stabilizing device that mechanically controls the tape tension using a spring or the like, detects a rotation speed of a motor that drives the tape, and controls the rotation speed of the motor; A CTL control mechanism for detecting the running speed of the tape and controlling the running of the tape , wherein the FG control mechanism is set to a low speed mode during reproduction.
In the tape winding apparatus of a magnetic recording and reproducing apparatus that have a and speed mode, when performing the fast forward or winding of the magnetic tape, the FG control mechanism in the low-speed mode and the constant speed mode
Wind the tape at a running speed that is a constant multiple of the tape running speed
FG control for controlling the tape traveling speed stepwise by the above, and the CTL control mechanism controls the rotation speed of the motor in steps.
Motor speed while rewinding the tape
Comprising a tape running speed switching means including a CTL control for controlling the degree, and a control mechanism switching means for switching, and a motor rotational speed switching control means for switching before Symbol CTL control mechanism the rotation speed of the motor, by the FG control take the tape slack performed stepwise slow control, and a feature that performs the winding of the tape at a low speed until the tape tension is constant, performing then the CTL control fast forward-winding in <br/> fast Tape winding device of a magnetic recording and reproducing device. 2. The tape winding device according to claim 1, wherein said tape running speed switching means further includes a motor control means for dividing the acceleration of the tape for fast-forward / rewind into two or more stages. Tape winding device for recording / reproducing devices. 3. A tape tensioner mechanically using a spring or the like.
Has a tape tension stabilizer that controls the
The speed of the motor that drives the
FG control mechanism to control speed and tape running speed
Take out and run the tapeToCTL control mechanism for controlling
FG control mechanismButLow speed mode during playback
Winding device for a magnetic recording / reproducing apparatus having a high speed mode
In place,  The FGControl mechanismThe low speed mode and the constant speed mode.
Tape at a running speed that is a constant multiple of the motor speed in
TakeAndMotor speedSlowly and graduallyControl
Take up the tapeBy taking the slack of the tape,
And an FG control step for keeping the tape tension constant; The CTL controlMechanism,Following the FG control step,Previous
The tape is wound by changing the rotation speed of the motor in stages.
By controlling the rotation speed of the motor,
TapeAt high speedRewindCTL controlProcessWhen, including Tape winding of magnetic recording and reproducing apparatus
Method.