JPH0313870Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention is equipped with a first tape deck and a second tape deck, and the reproduced signal from the first cassette mounted on the first tape deck is transmitted to the cassette mounted on the second tape deck. This invention relates to a dubbing cassette tape recorder that records on two cassettes.

(b) Prior art A dubbing cassette tape recorder is generally configured such that the first tape deck is used only for playback, and the second tape deck is used for recording and playback. It is possible to obtain a normal dubbing mode in which the A-side channel is recorded, or a full-width dubbing mode in which the playback signals of both the A and B channels of the first cassette are simultaneously recorded in the A and B channels of the second cassette. For this purpose, a selection switch is provided to set the electric circuit to normal dubbing mode or full width dubbing mode. Especially when obtaining full-width dubbing mode, side A and B of the second cassette
It is necessary to leave the lugs attached to each channel to prevent accidental erasure, which determines whether or not the channel can be recorded.

However, if you set the selection switch to full-width dubbing mode, install a second cassette that does not have a lug to prevent accidental erasure for the B-side channel, and continue dubbing, the recorded B-side channel will be erased. I had a problem with putting it away.

(C) Purpose of the invention The present invention was proposed to solve this problem, and detects the presence or absence of the lag to prevent accidental erasure, which determines whether or not the A and B side channels of the second cassette can be recorded. First and second detection switches are provided, and a switching circuit for switching from normal dubbing mode to full-width dubbing mode can be operated only when each detection switch detects the presence of the lag.

(d) Embodiment of the invention An embodiment of the tape recorder of the invention shown in the drawings will be described below.

1 is a front panel of a tape recorder in which a first tape deck 2 and a second tape deck 3 are arranged side by side;
The first tape deck 2 is provided with a playback head 4 since it primarily has a playback function, and the second tape deck 3 is provided with an erasing head 5 and a recording/playback head 6 so that it mainly has a recording and playback function.

7 is a first cassette which serves as a master tape during dubbing operation; 8 is a recess 10 having a lug 9 for preventing accidental erasure for the A-side channel; and a recess having a lug 11 for preventing accidental erasure for the B-side channel. 1
2 is the second cassette formed.

The playback head 4 plays the A-side channel of the first cassette 7 (first and second tracks in the case of stereo).
It has a playback gap for forward playback and a playback gap for reverse playback of the B-side channel (third and fourth tracks in the case of stereo). The erasing head 5 has an erasing gap for erasing the A-side channel of the second cassette and an erasing gap for erasing the B-side channel, and the recording/playback head 6 directly records the A-side channel of the second cassette. It has a recording gap for playback and a recording gap for reverse recording the B-side channel.

Reference numeral 13 denotes a detection piece for detecting the presence or absence of the erroneous erasure prevention lug 9 for the A-side channel of the second cassette 8. When the detection piece 13 detects the presence of the lug 9, it closes the first detection switch 14. do. 15 is the second
This detection piece 15 detects the presence or absence of the erroneous erasure prevention lug 11 for the B-side channel of the cassette 8. When the detection piece 15 detects the presence of the lug 11, it closes the second detection switch 16.

17 is an IC logic control board that electrically switches each operation of the first tape deck 2 (operation modes such as playback, rewind, fast forward, stop, pause, etc.) using a plunger by a mechanical logic IC 18; Each operation of the second tape deck 3 [operation modes such as recording, playback, rewind, fast forward, stop, pause, etc.] is controlled by the mechanical logic IC 1.
8' is an IC logic control board that is electrically switched using a plunger, and in particular, a dubbing operation button 20 for setting the first tape deck 2 to playback mode and simultaneously setting the second tape deck 3 to recording mode. is provided.

Reference numeral 21 denotes a selection switch for setting the first and second tape decks 2 and 3 to a normal dubbing mode for only side A of cassette or a full-width dubbing mode for both sides of cassette A and B. The switch is operated by a button 22 on the front panel 1.

FIG. 3 shows a dubbing control circuit driven by the operation of the dubbing operation button 20. When the dubbing operation button 20 is operated, the control signal output from the mechanical logic IC 18 is connected to the first detection switch 14 and the second detection switch 16 in series. Plunger 2 through the circuit
3, the first tape deck 2 is set to the playback mode, and the second tape deck 3 is set to the recording mode at the same time. A part of the control signal passed through the second detection switch 16 is applied to the switching circuit 24 through the terminal A of the selection switch 21. Such switching circuit 24
By applying a control signal, the electric circuits of the first tape deck 2 and the second tape deck 3 are switched from the normal dubbing mode to the full-width dubbing mode. and the selection switch 2
1 is switched to terminal B, the application of the control signal to the switching circuit 24 is cut off, and both ends of the second detection switch 16 are short-circuited.

Note that the first and second detection pieces 13 and 15 are rotated counterclockwise in FIG. 2, and the detection pieces detect the absence of a lug and enter the recess as shown by the solid line. The switch is configured to open when the switch is open, and close the switch when the detection piece detects that there is a lag as shown by the dotted line.

In the figure, 25 and 26 are reel spindles for the first cassette, 27 and 28 are reel spindles for the second cassette, 29 and 30 are capstans and pinch rollers for the first cassette, and 31 and 32 are for the second cassette. capstan and pinch roller.

The present invention is constructed as described above, and its operation will be described below.

(i) Normal dubbing operation When the button 22 is not operated, the selection switch 21 is switched to the terminal B side, and the selection switch 2
1 is in a state where both ends of the second detection switch 16 are short-circuited.

Therefore, when the detection piece 13 detects that the lug 9 for the A-side channel of the second cassette 8 is present,
When the first detection switch 14 is closed and the dubbing operation button 20 is operated, the control signal output from the mechanical logic IC 18 operates the plunger 23 through the first detection switch 14 and the selection switch 16. The first tape deck 2 is set to a playback mode and the second tape deck 3 is set to a recording mode at the same time. At this time, the switching circuit 24
Since the circuit is set for normal dubbing, the reproduction signal of the side A channel of the first cassette 7 can be normally dubbed to the side A channel of the second cassette 8.

In addition, when performing such normal dubbing,
Lug 1 for B-side channel of second cassette 8
Detecting the presence or absence of 1 is essentially irrelevant.

(ii) Full-width dubbing operation Operate the button 22 to switch the selection switch 21 to the terminal A side.

Therefore, when the detection piece 13 detects that the lug 9 for the A-side channel of the second cassette 8 is present, and the detection piece 15 detects that the lug 11 for the B-side channel is present, The first detection switch 14 and the second detection switch 16 are in the closed state, so when the dubbing operation button 20 is operated,
The control signal output from the mechanical logic IC 18 operates the plunger 23 through the first detection switch 14 and the second detection switch 16, and at the same time switches the switching circuit 24 from the normal dubbing mode to the full-width dubbing mode, so that the first tape deck 2 is in the playback mode. Then, the second tape deck 3 enters the recording mode, and the reproduction signals of the A and B double-sided channels of the first cassette 7 can be fully dubbed to the A and B double-sided channels of the second cassette 8.

(e) Effects of the invention Since the invention is constructed as described above, valuable content has already been recorded on the B-side channel of the second cassette, and in order to prevent this B-side channel from being erased, the device is designed to prevent accidental erasure. If there is no lug, even if the selection switch is switched to the terminal side that obtains full-width dubbing mode, the switching circuit cannot be activated, and even if dubbing operation is performed, the dubbing operation will inevitably be disabled. Therefore, there is no need to worry about accidentally erasing the recorded contents of the B side channel. Also, by switching the selection switch to the other terminal in this state, normal dubbing operation can be performed. This can be done immediately.

As described above, according to the present invention, full-width dubbing operation can be performed only when there are lugs of both channels A and B of the second cassette, which is useful.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a schematic configuration of the dubbing cassette tape recorder of the present invention, FIG. 2 is a schematic side view, and FIG. 3 is a circuit configuration diagram. 2... First tape deck, 3... Second tape deck, 7... First cassette, 8... Second cassette, 9, 11... Erroneous erasure prevention lug, 14... First detection switch, 16... Second detection switch, 2
1... Selection switch, 23... Plunger, 24
...Switching circuit.

Claims (1)

[Scope of utility model registration request] The playback signal of the first cassette mounted on the first tape deck is transferred to the second cassette mounted on the second tape deck.
A dubbing cassette tape recorder configured to record on a cassette includes a dubbing operation means for outputting a control signal, and a dubbing operation means for outputting a control signal,
first and second detection switches for detecting the presence or absence of a lug for preventing accidental erasure on the surface; and a plunger that operates in response to the control signal to set the first tape deck to a playback mode and simultaneously set the second tape deck to a recording mode. , a switching circuit that operates in response to the control signal to switch the first and second tape decks from a normal dubbing mode for only side A of cassette to a full-width dubbing mode for both sides of cassette A and B; and a switching circuit for applying the control signal to the switching circuit. a selection switch for controlling dubbing when the first and second detection switches detect the presence of each corresponding lag and the selection switch enables application of a control signal to the switching circuit; The control signal from the operating means operates the plunger and the switching circuit, and when only the first detection switch detects that there is a corresponding lag and the selection switch disables the application of the control signal to the switching circuit, the dubbing operation is performed. A dubbing cassette tape recorder characterized in that a control signal from the means is configured to operate a plunger.