KR0157545B1 - Method for mode reseting in magnetic record/reproduce apparatus - Google Patents

Abstract

The present invention relates to a mode return method of a magnetic recording / reproducing apparatus, and more particularly, to a mode return method for returning to a predetermined reference mode when power is again applied after being turned off in an unexpected state. The mode return method of the magnetic recording / playback apparatus according to the present invention utilizes a sensor for detecting a playback mode and an unloading stop mode detection means utilizing a cassette in switch and a cassette in switch, thereby selectively driving the plunger to consume power. It also reduces the mode return time and prevents abnormal operation.

Description

Mode return method of magnetic recording / playback device

1 is a block diagram showing a mode control circuit of a magnetic recording / reproducing apparatus.

2 is a flowchart showing a conventional mode return process in the magnetic recording / reproducing apparatus.

3 is an explanatory diagram for explaining a method for setting a return reference position in the unloading stop mode when a cassette tape is not inserted into the magnetic recording / reproducing apparatus.

4 is a flowchart for explaining a mode return method of the magnetic recording / reproducing apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

10: key input unit 20: micom

21: Mode discrimination unit 22: Reference signal generator

23: FG signal output unit 24: comparison unit

30: main servo IC 40: Camston motor control unit

50: FG signal detection unit 60: amplification unit

70: converting unit 200: second switch

210: Cyrillic 211: support point

220: pin slider

The present invention relates to a mode return method of a magnetic recording / reproducing apparatus. In particular, the present invention relates to a mode return method for returning to a predetermined reference mode when power is again applied after being turned off in an unexpected state. Related to this, a capstan motor and a limited number of mode switches can be used to load a magnetic tape into a head drum and to drive a magnetic tape without using a loading motor and multiple mode switches. The contents of a magnetic recording / reproducing apparatus are disclosed in detail in patent application No. 93-5016 (hereinafter referred to as March 31, 1993) issued by the same applicant. That is, it is possible to selectively transmit the power of the capstan motor to the loading system or the traveling system using a driving means such as a plunger.

As a mode in this prior application, an eject mode, an unloading stop mode (hereinafter also referred to as ULS), a stop mode, and a play back mode (hereinafter also referred to as PB) Among these modes, the stop mode is detected as a leaf switch, and the mode conversion method is used as the basis of other modes. In this case, the unloading stop mode is described in detail. After the eject mode is executed, a sensor for checking whether the cassette tape is seated or the like is detected and the motor is operated to prepare a new cassette tape for insertion. It is called a mode. FIG. 1 shows a block diagram of the mode control circuit of the magnetic recording / reproducing apparatus of the prior application which implements such a mode conversion method.

As shown in FIG. 1, the microcomputer 20 is connected to the key input unit 10 for selecting a mode. The main servo IC 30 for driving the capstan motor clockwise or counterclockwise according to the start control signal Start ct1 output from the microcomputer 20 is connected to the output terminal of the microcomputer 20, and the main servo IC ( 30 is connected to the capstan motor controller 40 for driving or stopping the capstan motor clockwise or counterclockwise according to the output of the main servo IC 30. An output terminal of the capstan motor controller 40 is connected to an FG signal detector 50 for detecting a frequency generator (FG) signal generated by the capstan motor controller 40 and an output terminal of the FG signal detector 50. The amplifier 60 is connected to amplify the output of the FG signal detector 50 to an appropriate level. A conversion section 70 for converting an analog type FG signal amplified by the output section of the amplifying section 60 into a digital type FG signal is connected to an output terminal of the amplifying section 60. The output terminal is connected to the microcomputer 20. The microcomputer 20 is connected to an output terminal of the key input unit 10 and determines the input mode corresponding to the signal output from the key input unit 10 and compares the current mode with the mode discriminating unit 21 and outputs a control signal. The FG signal generated according to the driving degree of the capstan motor and the reference signal generator 22 for controlling the driving of the capstan motor in accordance with the determined input mode and the current mode connected to the output terminal of the mode discriminating unit 21. The signal output from the FG signal output unit 23 and the FG signal output unit 23 is compared with the signal output from the reference signal generator 22 to output a stop control signal Stop ct1 when a predetermined condition is satisfied. The comparison part 24 is provided. The output terminal of the comparator 24 is connected to the main servo IC 30 to stop the driving of the capstan motor. The reference signal generator 22 outputs a high or low signal in the stop sensor S1 that outputs a high signal only in the stop mode, a high or low signal in the unloading stop mode, and outputs a high signal in the stop mode or the regeneration mode. And a cassette-in sensor S2 for outputting a low signal.

The conventional mode return process by the microcomputer in the magnetic recording / reproducing apparatus having the mode control circuit having such a configuration is shown in the flowchart of FIG. As shown in FIG. 2, when the power is applied to the magnetic recording / reproducing apparatus which is out of power (101), the plunger is operated (102), and the clockwise start control signal is output to the main servo IC (103). Drive 104 and allow the power of the capstan motor to be transmitted to the loading system and then turn off the plunger (105). After the plunger is turned off, a stop control signal is output to the main servo IC (106) to terminate the driving of the capstan motor (107), and then it is determined whether the current mode is the stop mode. That is, it is determined 108 whether the stop sensor is in an ON state. Exit if the stop sensor is on. In this case, the magnetic recording / reproducing apparatus is in the stop mode. If the stop sensor is OFF, it is determined whether the cassette-in sensor is on (109). When the cassette-in sensor is turned on, the clockwise start control signal is output to the main servo IC (110) to drive the capstan motor (111) and to output the FG signal (112). When the FG signal is countered (113) and the reference signal between the predetermined stop mode and the playback mode is determined during the FG signal counter (114), the control signal in the counterclockwise direction is output to the main servo IC (115). Drive clockwise (116). When the stop sensor is triggered from low to high while driving the capstan motor in the counterclockwise direction (17), the stop control signal is output to the main servo IC (106) and the driving of the capstan motor is terminated (107). In this case, the magnetic recording / reproducing apparatus is also in the stop mode.

On the other hand, when the stop sensor is in the off state and the cassette tape sensor is in the unloading stop mode, the FG signal is counted (113) and the reference signal number between the predetermined unloading stop mode and the stop mode is reached (114a). The stop control signal of the capstan motor is output to the main servo IC (106), and the driving of the capstan motor is terminated (107). In this case, the magnetic recording / reproducing apparatus is in the stop mode.

On the other hand, if the stop sensor is not on and the cassette tape sensor is in the off state, a clockwise start control signal is output to the main servo IC (118) to drive the capstan motor clockwise (119), and the output of the stop sensor is low. In the high trigger (120) outputs the counter-clockwise start control signal to the main servo IC (121) to rotate the capstan motor counterclockwise (122) and outputs the FG signal (123). At this time, from the moment when the output of the stop sensor is triggered from high to low (124), the number of FG signals is counted (125) and the reference signal between the stop mode and the unloading stop mode is reached (126). Output to the IC (127) terminates the drive of the capstan motor (128). In this case, the magnetic recording / reproducing apparatus is in the unloading stop mode.

In the conventional mode return method described above with reference to FIG. 2, power is always driven first when the power is turned on, and thus power loss occurs. In addition, when the power is applied between the unloading stop mode and the eject mode, the switch enters the stop mode and returns to the unloading stop mode, which takes a long time. In some cases, the eject is executed even when the eject mode is not input. There is this.

SUMMARY OF THE INVENTION An object of the present invention is to provide a mode return method of a magnetic recording / reproducing apparatus which reduces power loss caused by a plunger, can quickly return to a constant reference mode, and does not cause abnormal operation other than the input key.

The object of the present invention is to provide a motor shaft having a mode for determining the mode of the magnetic recording / reproducing apparatus in the rotational direction and the rotational angle, and to provide a mode conversion power, to generate a predetermined number of signals according to the rotational angle of the motor shaft. A mode returning method for returning to a required mode state from a constant stop state of a magnetic recording / reproducing apparatus having a power generator for selectively transmitting power of a signal generator and the motor to a loading system or a traveling system, as required. A reference value setting step of setting a predetermined reference position for the rotation of the motor shaft of the magnetic recording / reproducing apparatus, and setting the number of reference signals generated by the signal generator when switching from the set reference position to other modes, the magnetic recording / reproducing apparatus A situation judging step of judging a situation of a constant stop state of the state; the situation of the determined magnetic recording / reproducing apparatus According to the first driving step of driving the motor to rotate the motor shaft in the required direction, if the rotated motor shaft is rotated to the set reference position to re-drive the motor in accordance with the determined situation of the magnetic recording / reproducing apparatus A second driving step of generating a signal by rotating the motor shaft in a required direction; and generating the signal according to the rotation of the motor from the moment the motor shaft rotated by the second driving step reaches the set reference position. And a mode returning step of terminating the driving of the motor when the number of signals to be countered is equal to the set reference signal number.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the circuit configuration for realizing the mode control method of the present invention is almost the same as in Fig. 1, and the reference mode that can be detected by the mode detection sensor and the operation reference value of the motor is changed accordingly, and the return reference to the unloading stop mode is changed. Note that it must be set. That is, the unloading stop mode detecting means using the first switch S1 for detecting the playback mode and the second switch S2 for checking the presence or absence of the cassette tape in the magnetic recording / reproducing apparatus of the prior application. In addition, the number of FG signals generated between the play mode and the stop mode and the unloaded stop mode in the eject mode should be measured and set in advance. The mode return method according to the present invention in such a magnetic recording / reproducing apparatus will be described with reference to FIG. 3 and FIG.

FIG. 3 is an explanatory diagram for explaining a method of setting the return reference position in the on-loading stop mode when the cassette tape is not inserted into the magnetic recording / reproducing apparatus. Each is shown in the figure. 3 (a) shows a state where the cassette tape is inserted into the magnetic recording / reproducing apparatus and the second switch is turned on. FIG. 3 (b) shows the cassette tape being taken out of the magnetic recording / reproducing apparatus. The figure (3) shows the case where the second switch is turned on while the cassette tape is taken out from the magnetic recording / reproducing apparatus. As shown in FIG. 3, the second switch 200 for checking the presence or absence of the cassette tape, the key release 210 for operating the second switch 200, and in some cases, the key release 210 are shown. The pin slider 220 is shown to operate. The key release 210 is rotatable about the support point 211 and receives a force in a predetermined direction, thereby turning on / off the second switch. The pin slider 220 moves the key release 210 in certain cases while moving back and forth. That is, in the conventional case where the cassette tape is inserted into the third (a) magnetic recording / reproducing apparatus, the locking force is applied in the direction of the arrow by the deck mechanism, and the second switch is in the on state. The pin slider 220 moves back and forth but does not affect the Cyrillis 210. The second switch S2 is in the off state because the locking force is removed as the third (b) is the eject state. In FIG. 3 (C), when the power is applied in the state as shown in FIG. 3 (B), the pin slider 220 moves forward to momentarily drive the Cyrillis 210 to turn on the second switch S2. That is, the moment when the second switch S2 is turned off as the pin slider 220 retreats by driving the motor in the state of FIG. 3 (C) is set as the reference position at the time of returning to the unloading stop mode. By measuring the number of FG signals generated when returning to the unloading stop mode, the first switch is in the off state, and even if there is no cassette tape, a reference for returning to the constant reference mode state is provided.

4 is a flowchart for explaining a mode return method of the magnetic recording / reproducing apparatus according to the present invention. As shown in FIG. 4, when power is applied in a predetermined stop state of the magnetic recording / reproducing apparatus (301), it is checked whether the first switch S1 detecting the reproducing mode is on (302). When the first switch S1 is turned on, the plunger is driven (303) and the start control signal in the first direction of the motor is output to the main servo IC (304) to rotate the motor shaft of the motor in the first direction (305). When the power can be transmitted to the loading system, the plunger is stopped (306). At the same time, the start control signal in the second direction is output to the main servo IC (307), and the motor shaft is rotated in the second direction to output the FG signal (308). At this time, the number of FG signals is counted from the moment 309 when the first switch S1 is triggered from high to low by the motor shaft rotating in the second direction, and when the first reference signal number between the stop mode and the regeneration mode is reached, (311) The stop control signal of the motor is output to the main servo IC (312) and the driving of the motor is terminated (313). In this case, the magnetic recording / reproducing apparatus is in the stop mode.

On the other hand, if the first switch (S1) is not in the on state, it is determined whether the second switch (S2) is in the on state to check the presence or absence of the cassette tape (314). When the second switch S2 is in the ON state, the first direction start control signal is output to the main servo IC (315) to rotate the motor shaft in the first direction (316). At this time, the start control signal in the second direction is output to the main servo IC from the moment 317 when the first switch S1 is triggered from low to high in accordance with the rotation of the motor shaft in the first direction (307), thereby turning the motor shaft in the second direction. The controller then rotates the controller to output the FG signal (308). The number of FG signals is counted (310) from the moment (309) when the first switch (S1) is triggered from high to low in accordance with the rotation of the motor shaft rotated in the second direction (310) when the number of first reference signals (311) stops the motor. The control signal is output to the main servo IC (312) and the driving of the motor is terminated (313). In this case, too, the magnetic recording / reproducing apparatus is in the stop mode.

In addition, when the first switch is not in the ON state and the second switch is not in the ON state, the first direction start control signal is output to the main servo IC (318) to drive the motor to rotate the motor shaft in the first direction (319). . When the second switch S2 is triggered from low to high in the manner described in FIG. 3 according to the rotation of the motor shaft rotated in the first direction (320), the second direction control signal is output to the main servo IC ( 321) The motor is driven in the second direction. As a result, the number of output FG signals is countered (322), and when the number of preset second reference signals is set (323), if the second switch S2 is not in the ON state (324), the stop control signal is outputted to the main servo IC ( 312) The driving of the motor is terminated (313). In this case, the magnetic recording / playback apparatus is in the unloading stop mode.

In this state, when the cassette tape is inserted and the second switch S2 is turned on (324), the first direction start control signal is output to the main servo IC (315) to rotate the motor shaft in the first direction (316). . At this time, the start control signal in the second direction is output to the main servo IC from the moment 317 when the first switch is triggered from low to high according to the rotation of the motor shaft (307), thereby rotating the motor shaft in the second direction. The FG signal is output (308). The number of FG signals is counted (310) from the moment (309) when the first switch (S1) is triggered from high to low in accordance with the rotation of the motor shaft rotated in the second direction (310) when the number of first reference signals (311) stops the motor. The control signal is output to the main servo IC (312) and the driving of the motor is terminated (313). In this case, the magnetic recording / reproducing apparatus is in the stop mode.

By using the mode return method of the magnetic recording / reproducing apparatus according to the present invention as described above with reference to FIGS. 3 and 4, the power loss can be reduced, the mode return time can be shortened, and abnormal operation other than the input key can be achieved. This has the effect that it does not occur.

Claims (7)

A motor having a motor shaft in which the mode of the magnetic recording / reproducing apparatus is determined in the rotation direction and the rotation angle, the motor providing mode conversion power, a signal generator for generating a predetermined number of signals according to the rotation angle of the motor shaft, and the power of the motor A mode return method for returning to a required mode state from a constant stop state of a magnetic recording / reproducing apparatus having a power switching means for selectively transmitting a load to a loading system or a traveling system as needed, wherein the motor of the magnetic recording / reproducing apparatus A reference value setting step of setting a predetermined reference position for rotation of an axis and setting the number of reference signals generated by the signal generator when the mode is switched from the set reference position to other modes; A situation judging step of judging a situation of a constant stop state of the magnetic recording / reproducing apparatus; A first driving step of driving the motor to rotate the motor shaft in a required direction according to the determined situation of the magnetic recording / reproducing apparatus; A second driving step of, when the rotating motor shaft is rotated to the set reference position, driving the motor again according to the determined state of the magnetic recording / reproducing apparatus to rotate the motor shaft in a required direction and generating a signal; And counting the number of signals generated by the signal generator according to the rotation of the motor from the moment when the motor shaft rotated by the second driving step reaches the set reference position. And a mode returning step of terminating. The first position of the motor shaft at the start of the regeneration mode according to claim 1, wherein the reference position of the motor shaft set in the reference value setting step is a return operation reference when the magnetic recording / reproducing apparatus is in a regeneration mode or when a cassette tape is seated. A mode return method for a mode of a magnetic recording / reproducing apparatus, characterized in that a reference position and a second reference position, which is a reference for a return operation when the magnetic recording / reproducing apparatus is neither a playback mode nor a cassette seated. The number of reference signals set in the reference value setting step is determined by the number of first reference signals generated by the signal generator according to the rotation of the motor shaft when returning to the stop mode from the first reference position. And a second reference signal number generated by the signal generator according to the rotation of the motor shaft upon returning to the loading stop mode. 4. The method of claim 3, wherein the situation determining step includes a first judging step of judging whether the magnetic recording / reproducing apparatus is in a reproducing mode and a second judging step of judging whether a cassette tape is inserted in a non-playing mode. The mode return method of the magnetic recording / playback apparatus, characterized in that. 5. The method of claim 4, wherein the first driving step includes operating the power switching means and driving the motor in a first direction when the magnetic recording / reproducing apparatus is in a regenerating mode, thereby transmitting power of the motor to a loading system. And if the magnetic recording / reproducing apparatus is not in the reproducing mode, driving the motor to drive the motor shaft in the first direction regardless of whether the cassette tape is seated or not. Way. 6. The method of claim 5, wherein the second driving step drives the motor in the second direction when the magnetic recording / reproducing apparatus is in the reproducing mode, and rotates in the first direction when the cassette tape is seated instead of the reproducing mode. As soon as the motor shaft reaches the first reference position, the motor is driven in the second direction, and the motor shaft rotated in the first direction is rotated in the first direction when neither the regeneration mode nor the cassette tape is seated. And a signal is generated by driving the motor in the second direction as soon as it is reached. The method of claim 6, wherein the mode returning step includes a moment at which the motor shaft rotated in the second direction reaches the first reference position when the mode of the magnetic recording / reproducing apparatus is the reproducing mode or the cassette tape is seated. The number of signals is counted and the driving of the motor is terminated when the set first reference signal number is reached. If the cassette tape is not seated in the regeneration mode, the signal generator generates the signal according to the rotation of the motor shaft in the second direction. When the second reference signal is counted by counting the number of signals to be determined, it is judged again whether or not the cassette tape is seated. If the cassette tape is not seated, the driving of the motor is terminated. If the cassette tape is seated, the cassette is not played in the playback mode. Characterized by the first drive step when the tape is seated again Mode return method of the magnetic recording / reproducing apparatus.