JPH0654555B2 - Timed operation type magnetic recording / reproducing device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time-delayed magnetic recording / reproducing apparatus configured so that a part of its original function is lost when a certain set time elapses.

Conventional technology Conventionally, when leasing a magnetic recording / reproducing device, the lessee does not return even though the contract period has expired, which causes troubles with the leasing company and reduces the operating rate of the leasing item. There was a problem.

On the other hand, some radios, televisions, and the like have a timer (generally called a sleep timer) that turns off the power, for example, when a set fixed time has elapsed.

Problems to be Solved by the Invention However, this prior art is intended to prevent power consumption, and when applied to the above-described magnetic recording / reproducing apparatus, the system is controlled by turning off the power after a certain period of time. The means becomes inoperative, for example, the tape being reproduced is still wound around the cylinder (drum), and even if the user operates it, the stop mode is not entered and the tape cassette cannot be ejected. It happened.

Means for Solving the Problems In order to solve the above problems, the present invention has storage means for storing the output of the timer means generated after the elapse of a set time and for generating the control output, and the control output Therefore, the disturbance adding means for disturbing the main function of the magnetic recording / reproducing main body is provided.

Operation According to the present invention configured as described above, when the control output is generated after the set time elapses, the output disturbs the main function of the magnetic recording apparatus main body, and the normal normal operation is no longer possible. Without a timer,
If the memory means is reset, the original normal operation is immediately restored.

Embodiment An embodiment of the present invention will be described with reference to the block diagram of FIG. In FIG. 1, 1 is a video tape recorder (VT
R) Main body, 2 is a backup power supply unit, 3 is a backup power supply unit 2 that is backed up (103) by a timer unit that is always operating, and 4 is a control output (105) by an output (104) of the timer unit 3 that occurs after a set time The servo disturbance adding section inputs the control output (105) to the storage section 5 which holds the generated state and holds the occurrence state, and outputs the servo disturbance signal (106) to the servo circuit section 11 of the TVR main body 1.

FIG. 2 is a circuit diagram showing a specific configuration of the backup power supply unit 2. (102) is a power supply input from the VTR main body 1, 2
Reference numeral 01 is a backflow prevention diode, 202 is a charge current limiting resistor, and 203 is a capacitor. If the capacitor 203 is charged while the VTR is in normal operation, even if the power source (101) of the VTR main body 1 is turned off, the electric charge stored in the capacitor 203 is used as a drive current to operate the timer unit 3. If the electric double tank capacitor is used as the capacitor 203 and the timer unit 3 is composed of a CMOS circuit with extremely low current consumption, this capacitor 2
The timer unit 3 can be backed up for several days or more by the electric charge stored in 03. Further, the backup power supply unit 2 may be a dry battery or a solar battery.

FIG. 3 is a circuit diagram showing a specific configuration of the storage unit 4 and the servo disturbance adding unit 5. The storage unit 4 is a latching relay 40.
The contact of this relay is rendered conductive by the output (104) of the timer unit 4 and self-holds this conducting state even in the non-conducting state, and the self-holding is released and opened by the output of the reset circuit 7. . The servo disturbance adding unit 5 is a resistor 50 having one end connected to the ground.

The operation of this embodiment will be described below. The initial state is a state in which the timer unit 3 and the storage unit 4 are reset. When the power of the VTR main body 1 is turned on, the capacitor 203 of the backup power supply unit 2 is sufficiently charged. At this time, the start switch 6 is pressed to start driving the timer unit 3. For example, a leasing company pushes the start switch 6 when renting this embodiment.

The timer unit 3 can set a scheduled elapsed time, for example, how many days by a preset unit (not shown). Therefore, when the start switch 6 is pressed, the timer operation starts until the set time. At this time, the output of the servo disturbance adding unit 5 (1
06), so the VTR body 1 operates normally. At this time, even if the power source of the VTR main unit 1 is removed, the backup power source 2 continues the operation of the timer unit 3.

When the set time elapses, the timer unit 3 outputs (10
4) is generated, and the control output (105) is generated in the storage unit 4. And the memory | storage part 4 is hold | maintained in the state which can generate the control output (105). The servo disturbance adding unit 5 that has received the control output (105) outputs it to the servo circuit unit (106).
Occurs and disturbs the normal servo state.

In the specific example of FIG. 3, the latching relay 40 is set by the output of the timer unit 3 to make the contacts conductive, and the resistor 50 is connected to the VTR servo circuit unit 11. This resistance 50
Since the servo constant is forcibly changed by, the rotation number of the cylinder changes when the servo circuit unit controls the rotation of the cylinder (drum), for example, and the image is in a flowing state. (Note that the sound is played normally). Further, when the servo circuit section controls the rotation of the capstan, the tape speed can be changed, so that neither the image nor the sound is reproduced normally.

The servo disturbance adding section 5 can achieve the intended purpose by disturbing the synchronization of the image signal in addition to disturbing the servo circuit of the cylinder or the capstan.

In this embodiment, in particular, the VTR is controlled by the control output of the storage unit 4.
The main body 1 is not turned off. This is because there is a high possibility that the system control means will not operate when the power is turned off. In other words, it is sufficient for the user to know that the image or sound is disturbed, the user cannot recover it, and normal operation cannot be expected, and at least the eject operation is possible in order not to damage the head or tape. It is necessary.

When the servo disturbance occurs in the above, the output state that causes the state is held in the storage unit, so that the user cannot return to the original normal state.

The reset circuit 7 includes an input unit that cannot be operated by the user. For example, a switch provided inside the device or a special input form from outside the device (bar code reading, infrared or ultrasonic code input, etc.) Is started by. The reset circuit 7 resets the storage unit 4 and the timer unit 3. That is, the control operation from the storage unit 4 is lost by the reset operation when the servo disturbance occurs, and the servo returns to normal.

Further, the operation of the timer unit 3 can be stopped by resetting the set timer unit 3 in operation, and the restart of the timer unit 3 requires pressing the start switch 6.

As described above, according to the present embodiment, when the leasing company lends this device, if the start switch 6 is pressed and the timer unit 3 is activated, after a set time has elapsed, a servo disturbance occurs and the image is disturbed. Become. Since the user cannot restore the servo to the normal condition, he can bring it back to the leasing company, and the leasing company can reset it to the original state by resetting it by a predetermined method.

EFFECTS OF THE INVENTION According to the present invention, the main function is disturbed after the set time has elapsed, and this is maintained. That is, normal use becomes impossible. In addition, unlike the case where the power is turned off after a set time, the time-delayed magnetic recording / reproducing apparatus that does not damage the head tape can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a circuit diagram of a backup power supply unit, and FIG. 3 is a circuit diagram showing a specific example of a storage unit and a servo disturbance adding unit. 1 ... VTR main body, 2 ... Backup power supply section, 3 ...
Timer section, 4 ... Storage section, 5 ... Servo disturbance addition section,
6 ... Start switch, 7 ... Reset circuit.

Claims (2)

[Claims] 1. A timer means for setting an operating time, a constant power supply section for operating the timer means, and an output of the timer means generated after a lapse of a set time as an input to generate a control output and set its state. Storage means for holding, disturbance adding means for disturbing rotation of a cylinder of the magnetic recording / reproducing apparatus main body, rotation of a capstan or synchronization of image signals at the time of control output by the storage means, and means for resetting the timer means and the storage means. A time-delayed magnetic recording / reproducing apparatus characterized by being provided. 2. A time-delaying operation type magnetic recording / reproducing apparatus according to claim 1, wherein the storage means can be held in a non-energized state.