JPS63177338A - Video tape recorder - Google Patents

Abstract

PURPOSE:To facilitate the operation of dubbing, editing, infinitely continuous reproducing and picture recording by one set of the titled recorder by turning cassette tapes inserted in turn from one loading/unloading hole in the opposite direction to one another and loading into separate loading parts. CONSTITUTION:The cassette tapes B and B' inserted in turn from the one common loading/unloading hole on a front part 1 of the video tape recorder A are turned respectively in the contrary direction to each other (p) and (q) and then loaded into their separate loading parts respectively. In this constitution, the dubbing, editing, unlimited continuous reproducing and picture recording can easily be carried out by using one set of a video tape recorder.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a double-deck video tape recorder.

[Prior art]

Conventional video tape recorders can only load one cassette tape, so it is impossible to perform operations such as copying, editing, or continuous recording and playback of recorded tapes with one unit. It was possible.

For this reason, at least two units were required to perform such operations. However, it is difficult to prepare multiple video tape recorders, connect them, and perform the above operations.
It was complicated and required technical skill, and generally could not be carried out easily.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a video tape recorder that can easily perform copying, editing, continuous recording, and playback of recorded tapes with no time limit.

[Structure of the invention]

To this end, the present invention provides two loading sections inside the main body into which two cassette tapes are respectively loaded, which are sequentially inserted through one insertion/ejection port formed on the outer surface of the main body. Continuous recording/playback, etc. is possible, and the two cassette tapes are rotated in opposite directions within the main body and loaded into the loading section.

〔Example〕

Examples of the present invention will be described below. FIG. 1 is a plan view showing the video tape recorder of this embodiment loaded with a cassette tape, FIG. 2 is a front view thereof, and FIG. 3 is a front view showing the entire video tape recorder.

A is the main body of the video tape recorder, B and B' are the main body A
This is the same cassette tape that can be loaded and unloaded. The entire main body A is formed into a box shape, and one cassette insertion/ejection opening 2 is formed on the front face 1, and the opening width a is the same as the cassette tapes B and B.
' is formed slightly wider than the width on the long side side, and the insertion/ejection opening 2
This allows the cassette tapes B and B' to be inserted and taken out sequentially from their long sides.

Reference numeral 3 denotes a cassette tape loading section located one step below the insertion/ejection opening 2 and provided inside the main body A, which includes a cylinder 31 having two recording/reproducing heads for later recording, and an inheatance roller 32.
．． 33, audio control head 34, pinch roller 35, capstan 36, erasing head 37, loading post 38, 39 and other components are arranged at predetermined positions, and the cassette tape B is inserted into the insertion/ejection opening 2 and the loading section 3.
A conveyance device (not shown) is incorporated therein, which automatically conveys the tape between the tape drive device (not shown) and loads/unloads the tape drive device (not shown). This transport device is equipped with a carrier (not shown), in which the cassette tape B is stored and the above transport is carried out. The carrier is configured to rotate 96 degrees between the tape drive devices from inside the insertion/ejection opening 2, and to move up and down on the tape drive device.

In addition, a cassette tape loading section 3 having the same configuration as the loading section 3 is provided.
' is provided symmetrically at the same height as the loading section 3. The loading section 3' is also provided with a carrier for the cassette tape B'. The carrier waits directly below the carrier for cassette tape B when it is inside the insertion/ejection opening 2, and after the carrier for cassette tape B moves toward the loading section 3, it rises and is set inside the insertion/ejection opening 2. The carrier for cassette tape B is rotated 90 degrees between the inside of the insertion/ejection opening 2 and the tape drive device of the loading section 3' in the opposite direction to the rotating direction of the carrier for the cassette tape B, and is moved up and down on the tape drive device. It is composed of In FIGS. 1 and 2, loading section 3'
The same reference numerals used for each component of the loading section 3 are appended with "r'" for each component.

Both cassette tapes B and B' are loaded into the double loading section 3.3'' configured as described above, and each has an independent recording/reproducing function, and both cassette tapes B and B' are connected to each other. , B' has the function of dubbing and continuous recording/playback.

In addition to the cassette insertion/ejection port 2, the front face portion 1 is provided with a group of operation buttons 4, a group of display indicators 5, a group of television channel setting buttons 6, a time display portion 7, and the like. The operation button group 4 includes buttons for power, video/TV switching, playback, recording, rewind, fast forward, stop, pause, etc. for each loading section 3.3', as well as continuous and other buttons. have

8. 8' is a supply reel for cassette tape BSB'; 9.
9' is a take-up reel, and 10.10' is a tape.

FIG. 4 is a diagram showing a video signal processing circuit inside the video tape recorder described above (the audio signal processing circuit is omitted).

). Reference numeral 51 denotes an antenna terminal connected to an antenna, and a received television signal from there is taken in via a distributor 52 and a tuner 53.

55 is a Y/C separation circuit that separates the luminance signal and the carrier color signal from the NTSC signal input via the switch 54; the separated luminance signal is FM-modulated by the FM modulator 56, and the carrier color signal has a frequency They are converted to frequencies lower than the FM band by a conversion circuit 57, mixed by a Y/C mixer 58, and then sent from a recording amplifier 60 of one tape loading section 3 to a recording/reproducing head 61 via a switch 59. Alternatively, it is supplied to the recording/reproducing head 61' from the recording amplifier 60' of the other tape loading section 3'.

62.62' is a head amplifier that amplifies the image reproduction signal from the head 61.61' of the loading section 3.3', and the amplified signal is selectively passed through the switch 63,
The low-frequency component is extracted by a low-pass filter 64 and frequency-converted by a frequency conversion circuit 65 to become a 3.58 MHz carrier color signal, and the high-frequency component is extracted by a bypass filter 66 and demodulated by an FM demodulation circuit 67 to become a luminance signal. Become,
Each signal is mixed by a Y/C mixer 68 to become an NTSC signal and then output.

69 is an RF converter that modulates the NTSC signal into a specific channel signal;
The signal is input from the TV output terminal 71 to the antenna terminal of the TV receiver via the TV output terminal 71.

Note that it is also possible to connect the signal to the video input terminal of the television receiver without converting the RF signal by the RF converter 69.

The television/video changeover switch 70 described above remains switched to the broken line side (television side) when the video tape recorder is not used. A monitor circuit 72 monitors the image being recorded, and sends a channel signal selected by the tuner 53 to the RF converter 69.

FIG. 5 is a diagram showing the servo circuit of both tape loading sections 3.3', and the recording/reproduction servo circuit 8 of both tape loading sections 3.3'.
1.81', a frequency signal for the phase control reference of the drum and capstan during playback is sent from the crystal oscillator 82, and a pulse for the phase control reference of the drum during recording is sent from the vertical synchronization separation control pulse generation circuit 83. A control signal for recording is input to the control head. Reference numeral 84 denotes an end detection circuit for detecting the end of the tape provided in one of the tape loading sections 3, and the detection signal obtained here is inputted to both servo circuits 81 and 81'. 84'
is a similar termination detection circuit.

To use the video tape recorder of this embodiment, after turning on the power button, first insert the cassette tape B into the insertion/ejection opening 2 from the predetermined long side from which the tape 10 is fed out. When pushed in to a certain extent, the cassette tape B is automatically stored in a carrier waiting inside the insertion/ejection opening 2, and then rotated by the carrier in the direction of arrow P and brought to a predetermined position above the loading section 3. From there, it is dropped together with a carrier and loaded (see Figure 1). After that, loading post 38, ゛ 39
Then, the capstan 36 relatively enters the inside of the tape 10, and then the loading posts 38 and 39 move as shown by the dotted line to feed out the tape 10 and wrap it around the head cylinder 31 in an Ω shape, and the pinch roller 35 moves as shown by the dotted line. The tape 10 is moved in the direction shown to press the tape 10 onto the capstan 36, and loading of the tape 10 is completed. To take out the cassette tape B from the loading section 3, use the operation button group 4.
By operating a predetermined button, the operation is automatically performed in the opposite manner to the above.

Loading, loading, and unloading of the cassette tape B' into the loading section 3' are performed in the same manner as in the case of the cassette tape B described above. In this case, the cassette tape B' housed in the carrier for the cassette tape B' is rotated and loaded in the direction of the arrow q, which is opposite to the rotation of the cassette tape B.

Next, record/record tape B loaded in one loading section 3.
To restart the operation, operate the operating button group 4 to set the loading section 3 to recording or playback mode, and then press the switch 54 by operating a specific button in the operating button group.
59.63 should be switched to the solid line side shown in the figure. As a result, recording/reproduction is performed by the recording/reproducing head 61 on the loading section 3 side.

Conversely, when recording/replaying tape B' loaded in the other loading section 3', operate the operation button group 4 to set that loading section 3' to recording or playback mode. ,
Further, by operating the operation button group, the switch 54 may be switched to the solid line side, and the switches 59 and 63 may be switched to the broken line side.

As a result, recording/reproduction is performed by the recording/reproducing head 61' of the loading section 3'.

In addition, when performing continuous recording of images input from the antenna terminal 51, for example, tape B on the loading section 3 side - loading section 3
This can be done in the following manner: tape B' on the loading section 3' side, another tape B' on the loading section 3' side, and so on.

In this case, it is sufficient to keep the switch 54 switched to the side shown by the solid line, cause the loading section 3.3' to perform the recording operation alternately, and switch the switch 59 in synchronization with this. Loading section 3.
3', for example, the end detection circuit 84 detects the end of tape B, stops the servo circuit 81 on its own side, starts driving the servo circuit 81' on the other side in recording mode, and switches tape B'. Then, when the end detection circuit 84' detects the end of the tape B', the servo circuit is controlled so that the servo circuit 81' is stopped and the servo circuit 81 is started. Therefore, at this time, if the tape is replaced at the loading section on the side that is not recording, it becomes possible to record for a considerable length of time. The above control can be program-controlled by a microcomputer.

The same method can be used when consecutively playing back different tapes. In this case, the loading section 3.3' may be alternately brought into the reproducing state, and in synchronization with this, the switch 63 may be alternately switched between the solid line side and the broken line side.

When dubbing, for example, when dubbing an image reproduced from tape B by the head 61 onto another tape B' by the head 61', set the switch 54 to the dotted line side, the switch 59 to the dotted line side, and the switch 63 to the solid line side. At the same time, the loading section 3 is set to the playback mode, and the loading section 3' is set to the recording mode. At this time, the image signal of tape B reproduced by the head 61 is transferred from the head amplifier 62 to the switch 63→...Y/C mixing circuit 68 to the switch 54→Y
/C separation circuit 55→Y/C mixing circuit 58-switch 59-recording amplifier circuit 60'-head 61', and is recorded on the above-mentioned tape B'.

At this time, by turning off the monitor circuit 72 and switching the switch 70 to the solid line side, the image being dubbed can be monitored on the television receiver.

By an operation similar to this dubbing, the image reproduced by the head 61 can be edited and recorded on another tape by the head 61'.

Contrary to the above, it is also possible to copy or edit the image reproduced from tape B' by head 61' onto tape B by head 61. In this case, the switch 59 should be switched to the solid line side and the switch 63 should be switched to the broken line side, contrary to the above.

〔Effect of the invention〕

In view of the above, according to the present invention, since a loading section into which two cassette tapes are specially loaded is provided, it is possible to copy and edit recorded tapes, and to perform continuous recording and playback without any time limit. This can be easily done with a tape recorder.

Furthermore, since the insertion/ejection opening for inserting and removing the cassette tape is shared by the two-way set tape, it is possible to effectively utilize the space on the front surface of the main body for attaching other components.

[Brief explanation of the drawing]

FIG. 1 is an explanatory plan view of a video tape recorder according to an embodiment of the present invention in which a cassette tape is loaded, FIG. 2 is an explanatory front view of the same, and FIG. 3 is a front view showing the entire video tape recorder. FIG. 4 is a circuit diagram of the video processing circuit of the tape recorder, and FIG. 5 is a schematic block diagram of the servo circuit. A... Main body of the video tape recorder, B,, B'...
・Cassette tape, 1...front part, 2.2'...cassette insertion/ejection opening, 3.3'...cassette tape loading section,
31... Head cylinder, 32.33... Impedance roller, 34... Audio control head, 35... Pinch roller, 36... Capstan, 37... Erase fl! Head, 38. 39... Loading post, 4... Operation button group, 5... Display indicator, 6... Channel setting button group, 7...
・Time display section, 8.8'...Supply reel, 9.9'・
...Take-up reel, 10, 10'...tape.

Claims (3)

[Claims] (1) There are two loading sections inside the main unit into which two cassette tapes are loaded sequentially through one slot formed on the outside of the main unit, allowing dubbing, editing, and continuous recording. 2. A video tape recorder characterized in that the two cassette tapes are rotated in opposite directions within the main body and loaded into the loading section. (2) A patent claim characterized in that the insertion/ejection opening has a width corresponding to the width of the long side of the cassette tape, and the cassette tape can be inserted/removed from the insertion/ejection opening from the long side. The video tape recorder according to item 1. (3) The video tape recorder as set forth in claim 1 or 2, wherein the loading sections are arranged in parallel at the same height below the loading/unloading port.