JPS6042546B2 - magnetic recording and reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for easily checking whether recording is being performed normally in a magnetic recording/reproducing device using a rotary head.

In a magnetic recording/reproducing device (hereinafter abbreviated as VTR), in order to check whether recording is being performed normally during a recording operation, the method is to record for a while, then stop, rewind, and play back. However, it is necessary to perform an operation to return to the recording state after that, which has the disadvantage that the entire operation is troublesome and complicated. The present invention eliminates the above-mentioned drawbacks of the prior art and provides a device that can easily and easily check whether recording is being performed correctly. The key point of the present invention is the so-called PAUSE during recording operation. After pausing the tape with a similar operation and recording a signal on the part of the tape that is touched by the video head, the signal system is temporarily switched to playback operation, the signal is detected and played back, and the playback signal is recorded. This device determines whether the recording operation is normal or not based on the situation, and is configured so that tape-time stop and circuit system switching, as well as their release and return, can be performed by pressing and releasing a single lever. be. The present invention will be explained using an embodiment shown in FIG.

FIG. 1 shows an example in which the present invention is implemented in a well-known helical scan two-rotary head VTR. First, in the normal recording mode, the tape 1 is guided by the guide balls 2, 2', wrapped around the cylinder 3 about 1800 times, and is run by the capstan 5 and the pinch roller 6 in the direction of the arrow. In the cylinder section, video heads (hereinafter simply referred to as heads) 4 and 4' rotate and scan the tape, and signals applied to a recording signal input terminal 10 are processed by a recording circuit 9 to these heads. , are applied via switches 81 and 82 of relay 8, and recording operation on the tape is performed. When the recording monitor button 7 is pressed now, the pinch roller moves away from the capstan 5 as shown at 6' and the switch 13 is operated.

The delay drive circuit 14 is configured to operate the relay 8 after a certain period of time determined by internal resistors and capacitors after the switch 13 operates, and when the relay 8 operates, the switches 81, 82, and 83 move to R as shown in the figure. It is designed to switch from the side to the P side. Further, when switches 81 and 82 are switched to the P side, the signals read by the heads 4 and 4'' are applied to the reproducing circuit 11, and when the switch 83 is set to the R side, the signals are sent to the recording circuit 9.
The configuration is such that the power supply +Vcc is supplied to the reproducing circuit 11 when the reproducing circuit 11 is on the side. The button 7 is of an automatic return type, and returns to its original state when you stop pressing it, and the capstan 6 and switches 13, 81, 82, and 83 are also configured to automatically return to their previous recording operation states. ing.

With the above-described configuration, if the recording monitor button 7 is pressed during the recording operation, the pinch roller 6 separates from the capstan 5 and the tape 1 stops running.

At the same time, the switch 13 operates, but the relay 8 temporarily maintains the previous state, so a recording signal is applied to the heads 4, 4'', and the signal is recorded on the stopped tape.Then, the relay 8 operates, and the switch 81 , 82, 83 are on the P side,
The signal recorded on the tape 1 is detected by the heads 4, 4'', processed by the playback circuit 11, and output to the playback signal output terminal 12. By checking this playback signal on a monitor TV, etc., it can be determined whether the recording operation is normal or not. In this case, the power supply to the recording circuit 9 is cut off in order to prevent unnecessary interference signals from being mixed into the reproduction output.

Furthermore, if you stop pressing the recording monitor button 7 after the above judgment, the pinch roller 6, switches 13, 81, 82,
83 etc. automatically return to the initial recording operation state and continue the recording operation thereafter. In the embodiment shown in FIG. 1, the delay time until the circuit system is switched after the tape is stopped is obtained by the delay drive circuit 14, but this delay time can also be obtained mechanically as shown in FIG.

That is, when the recording monitor button 7 is pressed in FIG.
moves. If you continue to press the recording monitor button 7, the switch lever 15 will move and the switches 81, 82,
The state of 83 is switched. That is, after the pinch roller 6 moves and the tape 1 stops, the recording monitor button 7 is pressed.
The time from when the user presses the switch lever until the switches 81, 82, and 83 are switched is the delay time. Although omitted in the above example to avoid complexity, in order to ensure recording and playback when the tape is stopped, if necessary, remove the pinch roller and brake the tape supply reel to stop the tape. Well-known techniques such as applying pressure (slipping motion on the take-up reel side) can be applied.

Further, in the above example, the playback output is checked on a monitor television, but it may be configured to peak-detect the playback output and issue an instruction on a single screen.

As described above, according to the present invention, it is possible to check whether recording is being performed normally with a so-called one-touch operation, and the complexity of conventional rewinding operations can be eliminated.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a main part of an embodiment of a magnetic recording/reproducing apparatus according to the present invention, and FIG. 2 is an explanatory diagram showing another embodiment of the means for obtaining the delay time used in FIG. 1. No. 1...Tape, 4,4''...Video head, 6...Zench roller, 7...Record monitor button, 8...Relay, 81, 82, 83...
・Selector switch, 9...Recording circuit, 11...
・Regeneration circuit.

Claims (1)

[Claims] 1. In a magnetic recording and reproducing device using a rotating head, a pause operation button for temporarily stopping the running of the magnetic tape during recording operation, and means for stopping the running of the magnetic tape when the operation button is pressed; means for switching from recording operation to playback operation with a predetermined time delay after the operation button is pressed; and means for switching from playback operation to recording operation at the same time as the magnetic tape starts running when the pause caused by the operation button is released. A magnetic recording/reproducing device comprising: