JPH06103643A - Magnetic recording / reproducing device - Google Patents

Abstract

(57) [Summary] [Purpose] An object is to provide a magnetic recording / reproducing apparatus having a function of detecting the insertion of a broken tape into a VTR and notifying an abnormality. [Structure] Put a cut cassette tape in the VTR,
The tape does not move. Set the tape break check mode to 15.
When the supply reel pulse of 16 and the take-up reel pulse of 16 are input, the VTR is turned OFF and the abnormality is displayed and notified. [Effect] The effect is great for soft tape dubbing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus, and more particularly to a tape recorder for a dubbing VTR.

[0002]

2. Description of the Related Art In recent years, the popularization rate of commercially available VTRs has increased, and along with this, the number of opportunities to enjoy rental video software has increased, and there is a demand for lowering the price of soft tapes.

The outflow of defective soft tapes to the market is a problem.

FIG. 3 is a block diagram of a conventional dubbing VTR. 1 is a VTR for dubbing,
The internal configuration will be described below.

Reference numeral 2 is a VTR control circuit, which is a VT in case of an abnormality.
This circuit controls the entire VTR including the R safety protection operation. Reference numeral 3 is an abnormality display element, and when the VTR is abnormal, 11
According to the VTR abnormality signal of, the abnormality is displayed on the LED, LCD, fluorescent display tube and the like. 4 is a tape and 5 is a start / end detection L
The ED outputs 10 start / end detection lights in response to 12 LED light emission signals. 6 is a light-receiving semiconductor for detecting the end, 7 is a light-receiving semiconductor for detecting the start, and when the tape of 4 is the end, the start / end detection light of 10 is detected in the case of the leader tape at the start, 13 end detection signals, 14 Start edge detection signal is VTR of 2
Output to control circuit. Reference numeral 8 is a supply reel motor, and 9 is a take-up reel motor.

The conventional dubbing V having the above-described structure
In TR, if you put a broken tape in VTR,
The end detection light receiving semiconductor 6 and the start light receiving semiconductor 7 detect both the end detection signal 13 and the start detection signal 14
When it is output to the VTR control circuit of, the tape is ejected as an abnormal tape. Only 13 or 14 is 2
When it is output to the VTR control circuit of No. 2, the VTR control circuit of No. 2 judges that it is the start end or the end, and the VTR control circuit of No.
Alternatively, it shifts to the short REW mode. After switching to short FF and short REW mode,
If any of the signals 3 and 14 is output for a certain period of time, it is determined that the tape is abnormal, and the VTR control circuit 2 does not set the VTR to the STOP mode and cannot shift to a recording mode or the like. Only EJECT can operate.

[0007]

However, in the dubbing VTR constructed as described above, when a broken tape is put in the VTR, even in the above case, 3
If no abnormality is displayed on the abnormality display element of No. 1 and the above conditions are not met, for example, if neither of the detection signals 13 and 14 outputs a detection signal, it is assumed that dubbing has been completed and the defective soft tape is on the market. I had the problem of being leaked.

In consideration of the above problems, the present invention is a magnetic recording / reproducing apparatus capable of notifying an abnormality of a tape when a broken tape is put in the VTR by turning the VTR to AUTO OFF and notifying by a display element such as an LED. It is intended to provide.

[0009]

In order to solve the above-mentioned problems, the present invention provides a magnetic recording / reproducing apparatus having means for detecting a broken tape and means for displaying an abnormality.

[0010]

By the above means, the present invention makes it possible to notify the abnormality of the tape by the display element such as LED or LCD when the VTR is filled with the abnormal tape.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic recording / reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a magnetic recording / reproducing apparatus according to the present invention. Reference numeral 1 is a VTR, and the inside thereof will be described below. Reference numeral 2 is a VTR control circuit, which is a circuit for controlling the entire VTR including a VTR safety protection operation in the event of an abnormality. Three
Is an abnormality display element, and when the VTR is abnormal, the abnormality is displayed on the LED, LCD, fluorescent display tube or the like by the tape abnormality signal 11. 4 is a tape and 5 is a start / end detection LED 1
The start / end detection light of 10 is output by the LED light emission signal of 2. 6 is a light-receiving semiconductor for detecting the end, 7 is a light-receiving semiconductor for detecting the start, and when the tape of 4 is the end, the start / end detection light of 10 is detected in the case of the leader tape at the start, 13 end detection signals, 14 The start end detection signal is output to the VTR control circuit 2. Reference numeral 8 is a supply reel motor, 9 is a take-up reel motor, which outputs 15 supply reel pulses and 16 take-up reel pulses when the respective reel motors are rotating. Reference numeral 17 denotes a reel drive circuit, which receives 18 reel rotation signals output from the VTR control circuit 2 and outputs 19 reel drive signals 8
It is output to the reel motor 9 to control the rotation.

With respect to the present embodiment configured as described above,
The operation will be described below. FIG. 2 is an example of a flowchart for detecting whether the tape is cut.

When the cut tape is put in the VTR, the end detection light receiving semiconductor 6 and the start end detection light receiving semiconductor 7 are both 13 end detection signals and 14 start end detection signals are V 2
When it is output to the TR control circuit, it is judged as an abnormal tape and the VTR control circuit of 2 turns the VTR to AUTO OFF, or when only 13 or 14 is output to the VTR control circuit of 2, Judging that it is the start end or the end, the VTR control circuit 2 shifts to the short FF or short REW mode. If any of the above signals 13 and 14 is output for a certain period of time after the short FF or short REW mode is entered, it is determined that the tape is abnormal, and the VTR control circuit 2 sets the VTR to A
In the case of a broken tape that does not meet these two criteria for putting in the UTO OFF mode, the VTR control circuit 2 sets the VTR once in the suspend mode, and in the case of a normal tape, the tape does not move. At this time, torque is applied to the reel motors 8 and 9 to apply the tape tension. If the tape is cut, the reel motor rotates, so that 15 supply reel pulses and 16 take-up reel pulses are output to the VTR control circuit 2. In such a case, the VTR control circuit of No. 2 judges that the tape is abnormal and puts the VTR in the AUTO OFF mode. When the above-mentioned tape breakage is detected, all the VTRs are turned OFF and the tape abnormality signal 11 is output to the abnormality display element 3 to notify the abnormality. At this time, only the EJECT key can be pressed. When the tape is ejected, the AUTO OFF mode is released.

As described above, according to this embodiment, when an abnormal tape is inserted in the VTR, it can be notified by the display.

[0015]

As described above, according to the present invention, when an abnormality of a tape break occurs during the dubbing, it is possible to know the abnormality of the tape, and the soft tape has a great effect on the dubbing. is there.

[0016]

[Brief description of drawings]

FIG. 1 is a block diagram of a magnetic recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart of tape breakage detection according to the present invention.

FIG. 3 is a block diagram of a conventional magnetic recording / reproducing device.

[Explanation of symbols]

 1 VTR 2 VTR control circuit 3 Abnormality display element 4 Tape 5 Start / end detection LED 6 End detection light-receiving semiconductor 7 Start-end detection light-receiving semiconductor 8 Supply reel motor 9 Take-up reel motor 10 Start / end detection light 11 Tape error signal 12 LED Light emission signal 13 End detection signal 14 Start detection signal 15 Supply reel pulse 16 Take-up reel pulse 17 Reel drive circuit 18 Reel rotation signal 19 Reel drive signal

Claims (1)

[Claims] 1. A magnetic recording / reproducing device comprising means for detecting whether or not a tape is broken, and means for displaying an abnormality, wherein when a broken tape is put in a VTR, an AUTO OFF is made to notify the abnormality of the tape. apparatus.