JPH02310844A - Recording operation control system - Google Patents

Abstract

PURPOSE:To reduce the cost of configuration to be required when timer operation is executed by providing a charging circuit in the side of a remote controller and using a power source, which is built in a recording equipment, for a charging voltage to the charging circuit. CONSTITUTION:The charging circuit is provided to be composed of a variable resistor VR (resistor for setting recording operation time) to charge power supply +B for recording operation of a VTR to the remote controller with the turning ON of a start/stop switch SW and a charging/discharging capacitor CC. A transistor TR 3 for stop signal output is provided as a means for recording operation stop to be driven by the charging voltage, to be turned ON and to output the change of a collector optential as a stop signal as a result after the lapse of a fixed time, in which the value (time constant) of the charging voltage achieves a prescribed value to be deter mined by product between the resistance value of the variable resistor VR and the capacity value of the charging/discharging capacitor CC after charging operation is started by the charging/discharging capacitor CC in this charging circuit. Thus, when the remote controller is operated, the power source in the side of the recording equipment can be used for driving the timer in the side of the remote controller and the cost is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a recording operation control system comprising a recording device such as a VTR and a remote control device (hereinafter referred to as a remote control) for the recording operation of the recording device. 5 (Prior Art) FIG. 3 is a circuit diagram of a conventional recording operation control system. A VTR is used as a recording device in this recording operation control system.

The VTR side of this recording operation control system includes a recording operation power source B, an input section IN into which a start signal related to the start of the recording operation of the VTR and a stop signal related to the stop of the recording operation are respectively input. , and an output section OUT that outputs a display signal related to the recording operation.
and a power supply transistor TR1 which is turned on when a display signal from the output section OUT of the microcomputer CT is applied to its base and outputs a power supply element B for recording operation. The remote control side that remotely controls the recording operation of this VTR includes a start/stop switch SW that supplies a start signal and a stop signal to the input section IN of the microcomputer CT when on and off, respectively, and a power supply. It includes a light emitting diode DI as a recording operation display element which is turned on in response to the supply input of the recording operation power supply element B which is manually inputted through the collector and emitter of the supply transistor TR.

Kokote, c 1. c2. C3 indicates a connection between the VTR and the remote control, connection C1 is for outputting the start signal and stop signal from the start/stop switch SW to the input section IN of the VTR, and connection C2 is for This is for supplying and outputting the power from the recording operation power supply terminal B of the VTR to the remote control, and the connection part C3 is connected to the VTR.
This is a common ground section for the TR and remote control.

In the conventional recording operation control system having such a configuration, when the start/stop switch SW is turned on, the potential of the input section IN of the microcomputer CT becomes the ground potential;
This potential change is given as a start signal. The microcomputer CT to which the start signal has been applied outputs a low-level display signal from its output section OUT, which turns on the power supply transistor TR. The light is supplied to the light-emitting diode D1 via the collector-emitter, and the light-emitting diode D1 emits light to indicate that a recording operation is in progress.

(Problems to be Solved by the Invention) In such a conventional recording operation control system, the light emitting diode DI is used merely to indicate that recording operation is in progress. If you want the VTR to perform a recording operation for a certain period of time, you can install a timer on the remote control side and a battery inside the remote control to drive the timer, or use a separate power source B for recording operation. A dedicated power supply was used.

However, there is a problem in that incorporating a battery or using a separate dedicated power source to drive the timer increases costs.

The present invention has been made in view of the above problems, and includes V
When using a remote control to cause a recording device such as a TR to perform a recording operation for a certain period of time, the power supply on the recording device side can be used to drive the timer on the remote control side, reducing costs. It is intended to be.

(Means for Solving the Problems) In order to achieve such an object, the recording operation control system of the present invention operates in response to the input of a recording operation power source and a start signal and a stop signal. A recording device having a built-in recording operation control unit that controls a recording operation and a stop of the recording operation, and outputs a display signal during the recording operation to be supplied and output from the recording operation power source, and a recording device that controls recording operation and stop of the recording operation, and Each includes a start/stop switch that supplies a start signal and a stop signal to the recording operation control section, and a remote control that includes a recording operation display element that lights up in response to the recording operation power supply input. In the recording operation control system, the remote controller includes a charging circuit that starts charging the recording operation power supply supplied from the recording device when the start/stop switch is turned on, and a charging circuit that controls the charging operation of the charging circuit. and recording operation stop means that is driven by the charging voltage and outputs a stop signal after a certain period of time from the start until the charging voltage value reaches a predetermined value, and the recording operation control section Even if a stop signal is not applied from the stop switch, when a stop signal is applied from the recording operation stop means, the apparatus operates in response to the stop signal to stop the recording operation of the recording apparatus.

(Function) In the above configuration, the recording operation control section operates in response to the respective inputs of the start signal and the stop signal to control the recording operation and the stop of the recording operation, and outputs the display signal during the recording operation. to supply and output power from the recording operation power source.

In the remote control, the start/stop switch outputs a start signal and a stop signal to the recording operation control section when it is on and off, respectively, while the recording operation display element outputs the power supply for the recording operation. Lights up in response to input.

In the recording operation control system that performs such basic operations, the charging circuit in the remote controller starts charging the recording operation power supplied from the recording device when the start/stop switch is turned on. . Further, the recording operation stop means is driven by the charging voltage and outputs a stop signal after a certain period of time has elapsed since the charging operation of the charging circuit started and the charging voltage value reaches a predetermined value.

The recording operation control section operates in response to a stop signal to cause the recording device to perform a recording operation when a stop signal is supplied from the recording operation stop means even if a stop signal is not supplied from the start/stop switch. make it stop.

Therefore, in the recording operation control system configured as described above, after the start/stop switch is turned on, the recording device is automatically This means that there is a built-in timer that can perform the recording operation, and the power supply for driving the timer is the power supply built into the recording device, and the remote control side must have a battery for driving the timer or a dedicated power supply for that timer. There is no need to use a power source.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. In this example, the application is applied to a VTR as a recording device, but it is not limited to a device that performs recording such as a VTR. For example, it includes recording equipment for recording audio and other recording equipment.

FIG. 1 is a circuit diagram of a recording operation control system according to an embodiment of the present invention, and FIG. 2 is a timing chart for explaining the operation of the embodiment. In FIG. 1, descriptions of parts and parts having the same reference numerals as those shown in FIG. 3 according to the conventional example will be omitted.

In FIG. 1, the functions of the start/stop switch SW and light emitting diode D1 on the remote control side and the configuration on the VTR side are the same as those in FIG. 3.

In this embodiment, the remote control basically includes a variable resistor VR (recording operation time setting resistor) for charging the recording operation power supply B of the VTR when the start/stop switch SW is turned on. A charging circuit consisting of a charging and discharging capacitor CC is provided, and after the charging operation of the charging and discharging capacitor CC in this charging circuit starts, the charging voltage value is equal to the resistance value of the variable resistor VR and the charging and discharging capacitor C.
After a certain period of time has elapsed to reach a predetermined value determined by the product (time constant) of C and the capacitance value, it is driven by the charging voltage and turns on.
A major feature of the present invention is that a stop signal output transistor TR3 is provided as recording operation stop means for outputting the change in collector potential as a stop signal.

Hereinafter, the configuration and operation of the remote control, including the basic configuration described above, will be explained in detail with reference to the timing chart of FIG. Note that in FIG. 2, (a) to (l) indicate potential and current changes (d) at each part in FIG. 1.

First, when the start/stop switch SW is turned on at time to, the cathode potential of the diode D3 drops to the ground potential as shown in FIG. 2(a). As a result, the potential on the anode side of the diode D3 also drops to the ground potential as shown in FIG. 2(b), and this change in the anode side potential is transmitted to the input section IN of the microcomputer CT.

As a result, the microcomputer CT outputs a low-level potential display signal from its output section OUT at time t1. As a result, the transistor TRI turns on, and as a result, as shown in FIG. 2(C), the power source 1B is turned on at the same time t! It is located on the collector side of the transistor TRI. At this time,
Since the base potential of the light emitting brightness adjustment transistor TR2 has already been lowered to the ground potential at time tO, this transistor TR2 is turned on, and as a result, the light emitting diode DI reaches the light emitting current value shown in FIG. 2(d) at time 11. As shown in the figure, it is driven to emit light at high brightness. This light emitting diode D
The high-intensity light emission of I indicates that the recording operation has started. Here, FIG. 2(e) shows the voltage potential of the emission brightness adjusting transistor TR2.

At time t3 when the start/stop switch SW turns from ON to OFF, the base potential of the light emission brightness adjustment transistor TR2 rises as shown in FIG. 10B is supplied to the light emitting diode DI via the resistor R1, and the luminance of the light emitting diode D1 decreases as shown in FIG. 2(d). At the same time t3, as shown in FIG. Charging starts.

The charging speed of this charging circuit is determined by a time constant that is the product of the resistance value of the variable resistor VR and the capacitance value of the charge/discharge capacitor CC, and the charging voltage value turns on the stop signal output transistor TR3 at time t4. Until a predetermined value that can be reached is reached, the input section I of the microcomputer CT
Since no stop signal is given to N, the microcomputer CT causes the VTR to perform a recording operation. Then, when the charging voltage value of the charging circuit reaches a predetermined value at time t4, the stop signal output transistor TR3 is turned on, and as a result, the collector potential of the stop signal output transistor TR3 decreases, and the collector potential changes. is applied as a stop signal to the input section IN of the microcomputer CT, and the microcomputer CT thereby operates to stop the recording operation of the VTR.

Note that the charging voltage in the charging/discharging capacitor CC is discharged via a resistor R2 and a diode D2 in order to ensure accurate charging operation.

In this way, the recording operation control system of this embodiment can control the recording operation time by using the charging circuit as a timer, while using the built-in power supply of the VTR as the power source for the timer. There is no need to use timer batteries or dedicated power supplies.

(Effects of the Invention) As is clear from the above explanation, according to the present invention,
A charging circuit is provided on the remote control side to drive a timer on the remote control side when the remote control is operated to cause a recording device such as a VTR to record for a certain period of time, and the recording device is built in to supply the charging voltage to the charging circuit. Since the power source is used, there is no need to use a battery to drive the timer or prepare a dedicated power source separate from that power source as in the conventional example, and as a result, the recording operation of the recording device can be controlled by the timer. It is possible to reduce the cost of the configuration required in some cases.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a recording operation control system according to an embodiment of the present invention, and FIG. 2 is a timing chart for explaining the operation of the embodiment. FIG. 3 is a circuit diagram of a conventional example. SW...start/stop switch, CT...microcomputer (recording operation control unit), Dl...light emitting diode (recording operation display element), VR...variable resistor, CC...charging/discharging capacitor , TR3...pass stop signal output transistor.

Claims (1)

[Claims] (1) It operates in response to the input of a power supply for recording operation and a start signal and a stop signal to control the recording operation and the stop of the recording operation, and outputs a display signal during the recording operation to perform the recording operation. a recording device having a built-in recording operation control section that is supplied and output from a power supply for the recording device; a start/stop switch that supplies a start signal and a stop signal to the recording operation control section when on and off, respectively; A recording operation control system comprising a remote control device including a recording operation display element that operates and lights up in response to a power supply input for operation, wherein the remote control device is configured to: a charging circuit that starts charging the recording operation power supply supplied from the recording device; and a charging circuit that starts charging the charging voltage of the charging circuit after a certain period of time reaches a predetermined value after the charging operation of the charging circuit starts. recording operation stop means that is driven by a stop signal and outputs a stop signal; 1. A recording operation control system characterized in that when a stop signal is given, the recording operation of the recording device is stopped by responding to the stop signal.