JPS63177337A - Video tape recorder - Google Patents

Abstract

PURPOSE:To enable one set of the titled recorder to perform dubbing, editing, infinitely continuous reproducing and picture recording by loading two cassette tapes into their different separate loading parts from one loading/unloading hole. CONSTITUTION:When two pieces of cassette tape B' and B are loaded with their short side leading into the video tape recorder A through its loading/ unloading hole 2 in which opening hole corresponds in width to the short side of the cassette tape, the tape B' and B are loaded separately into their respective loading parts 3' and 3 provided in parallel. In this constitution, the dubbing, editing, infinitely continuous reproducing and picture recording are all easily performed by 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 not possible to perform operations such as copying and editing recorded tapes, or continuous Vt recording and playback for an unlimited amount of time. It was impossible.

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 has two loading sections into which two cassette tapes inserted sequentially from one insertion/ejection opening are loaded separately, making it possible to perform dubbing, editing, continuous recording/reproduction, etc. did.

〔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 main body A is formed into a box shape as a whole, and one cassette insertion/ejection opening 2 is formed on the front face 1, and the width a of the opening is the same as that of the cassette tape BSB.
' is formed slightly wider than the width of the short side of the insertion/ejection opening 2.
Therefore, the cassette tapes B and B' can be inserted and taken out sequentially from the short sides.

Reference numeral 3 denotes a cassette tape loading section located one step below the loading/unloading port 2 and provided inside the main body A, which includes a cylinder 31 having two recording/reproducing heads for later recording, and an impedance roller 32.
．． 33, components such as audio control head 34, pinch roller 35, capstan 36, erasing/rad 3f, loading post 3, 39, etc. are placed in predetermined positions, and cassette tape B is loaded into insertion/ejection opening 2. A conveying device (not shown), etc., which automatically conveys between the tape drive unit 3 and loading/unloading the tape into/from a tape drive device (not shown), is incorporated. This transport device includes a carrier (not shown)
is provided, in which the cassette tape B is stored and the above-mentioned conveyance is performed.

In addition, a cassette tape loading section 3 having the same configuration as the loading section 3 is provided.
' is provided in parallel at the same height as the loading section 3 on the side closer to the insertion/ejection port 2. In FIGS. 1 and 2, each component of the loading section 3' is given the same reference numeral as that used for each component of the loading section 3, with the suffix "r'" added thereto. The cassette tape B' is conveyed in the loading section 3' by a carrier different from the one described above.

Both cassette tapes B and B' are loaded into the double loading sections 3.3' configured as described above, and each has an independent recording/reproducing function. , B' has the function of copying (dubbing) between them and continuous silver/reproduction.

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 tapes B and B'; 9.
9' is a take-up reel, and 10 and 10' are tapes.

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 manually inputted 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 the signal may be connected to a video input terminal of a television receiver without being converted into an 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, first, after turning on the power button, insert the cassette tape B into the insertion/ejection opening 2 from the predetermined short side. The cassette tape B is automatically stored in a carrier waiting inside the insertion/ejection opening 2, and transported by the carrier in the direction of arrow It is brought to a predetermined position on the upper side of the machine, and from there it is dropped together with a carrier and loaded (see Figure 1). Thereafter, the loading post 38 , 39 and the capstan 36 automatically enter the tape 10 relatively to each other, and the loading post 38 , 39 moves as shown by the dotted line to feed the tape 10 into the head cylinder 31 . As the tape 10 is wound in an Ω shape, the pinch roller 35 moves in the direction shown by the dotted line to press the tape 10 onto the capstan 36, and the loading of the tape 10 is completed. Removal of the cassette tape B from the loading section 3 is automatically performed by operating a predetermined button of the operation button group 4 in the opposite manner to the above.

On the other hand, the cassette tape B' is loaded into the loading section 3' using a carrier different from the carrier described above. That is, when the carrier for cassette tape B moves as described above, another carrier for cassette tape B' that was waiting below the carrier (loading section 3') rises and moves inside the insertion/ejection opening 2. Set. In this state, when the cassette tape B' is inserted into the insertion/ejection opening 2 from its predetermined short side, the cassette tape B' will automatically be inserted into the carrier inside the insertion/ejection opening 2 in the same manner as above after being pushed in to a certain extent. The carrier is stored and then dropped into the loading section 3' together with the carrier to be loaded. Loading of the cassette tape B' is performed in the same manner as for the cassette tape B described above. Further, the removal from the loading section 3 is automatically performed by operating a predetermined button of the operation button group 4 in the opposite manner to the above.

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/playback is performed by the recording/playback head 61 on the side of the loading section 3.

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
The process can be performed as follows: tape B' on the ' side -> another 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 leave the switch 54 set to the side shown by the solid line, alternately cause the loading units 3.3' to record, and switch the switch 59 in synchronization with this.
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'. The servo circuit is controlled so that the recording is continued for w1, and then when the end detection circuit 84' detects the end of the tape B', 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 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〕

As described above, according to the present invention, since a loading section for loading two cassette tapes is provided, copying, editing, continuous recording, playback, etc. of recorded tapes can be carried out in one place.
This can be easily done with a basic tape recorder. Furthermore, since the insertion/ejection opening for inserting and removing the cassette tape is the same location as the cassette tape, the area on the front surface of the main body for attaching other components etc. is not narrowed down.

[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, 3
1... Head cylinder, 32.33... Impedance roller, 34... Audio control head, 35... Pinch roller, 36... Capstan,
37... Degaussing 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) Two cassette tapes, which are inserted sequentially through a single insertion/ejection port, are loaded separately into two loading sections, making it possible to perform dubbing, editing, continuous recording/playback, etc. A videotape recorder with special features. (2) The insertion/ejection opening has a width corresponding to the width of the short side of the cassette tape, and the cassette tape can be inserted/removed from the insertion/ejection opening from the short side. A videotape recorder according to scope 1. (3) The loading portions are formed side by side at the same height, as claimed in claim 1 or 2.
Videotape recorder as described in Section.