JPH0318263B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention comprises a first cassette playing section and a second cassette playing section, and a first cassette playing section that transmits the playback signal of the first cassette tape loaded in the first cassette playing section. This invention relates to a dubbing cassette tape recorder configured to record on a second cassette tape attached to a two-cassette performance section.

(b) Prior art In general, a dubbing cassette tape recorder is configured such that the first cassette playing section is used only for playback, and the second cassette playing section is used for recording and playback. There is a normal dubbing mode in which the signal is recorded on the A-side channel of the second cassette tape, or a full-width dubbing mode in which the playback signal of the A and B double-sided channels of the first cassette tape is simultaneously recorded on the A and B double-sided channels of the second cassette tape. You can get it. For this purpose, a selection switch is provided to set the electric circuit to normal dubbing mode or full width dubbing mode. In particular, when obtaining the full-width dubbing mode, it is necessary to leave the lugs for preventing accidental erasure, which determine whether or not recording is possible on the A-side and B-side channels of the second cassette tape, attached to each channel.

(c) Problems to be Solved by the Invention If the selection switch is set to full-width dubbing mode, a second cassette tape that does not have a lug to prevent accidental erasure for the B-side channel is installed, and the dubbing operation is continued. Recorded B that must not be erased
There was a problem where the face channel was deleted.

(d) Means for Solving the Problems In view of the above-mentioned problems, the present invention provides a method for transmitting the playback signal of the first cassette tape mounted in the first cassette playing section to the second cassette tape mounted in the second cassette playing section. In a dubbing cassette tape recorder adapted to record on tape, a selection switch for setting an electric circuit to a normal dubbing mode for the A-side channel of each cassette tape or a full-width dubbing mode for both A and B-side channels;
an operating means for switching the selection switch;
A first detection member and a second detection member are provided for detecting the presence or absence of an erroneous erasure prevention lug on the A-side and B-side channels of the cassette tape, and the first and second detection members detect the presence or absence of the corresponding lugs, respectively. The second detection member is configured to operate independently in response to control the recording operation of the second cassette performance section, and when the selection switch is switched to the normal dubbing mode by operation of the operating means, the second detection member detects the corresponding lag. When the selection switch is set to the full-width dubbing mode, the recording operation of the second cassette playing section is controlled by the first and second detection members; To provide a dubbing cassette tape recorder characterized in that when a selection switch is set to normal dubbing mode, the recording operation of the second cassette performance section is controlled only by the first detection member.

(E) Effect When the selection switch is set to full-width dubbing mode, the second cassette tape is switched on for full-width dubbing only when there are lugs to prevent accidental erasure, which determine whether or not the A-side and B-side channels of the second cassette tape can be recorded. This enables the recording operation of the cassette performance section, but if there is no lag on either side, the recording operation for full-width dubbing operation cannot be performed, and when the selection switch is set to normal dubbing mode, the A-side channel By detecting only the presence or absence of a lag, the recording operation of the second cassette performance section can be performed for a normal dubbing operation.

(F) Embodiments Below, embodiments of the tape recorder of the present invention shown in the drawings will be described.

Reference numeral 1 designates a front panel of a tape recorder in which a first cassette playing section 2 and a second cassette playing section 3 are arranged in parallel. 2
The cassette playing section 3 is provided with an erasing head 5 and a recording/playback head 6 in order to primarily have a recording/playback function.

Reference numeral 7 denotes a first cassette tape that serves as a master tape during dubbing operations; 8 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. This is a second cassette tape in which a portion 12 is formed.

The playback head 4 reads A of the first cassette tape 7.
It has a playback gap for forward playback of the B-side channel (first and second tracks in the case of stereo) and a playback gap for reverse playback of the B-side channel (third and fourth tracks in the case of stereo).
Further, the erasing head 5 is used to erase A of the second cassette tape 8.
The recording/playback head 6 has an erasing gap for erasing the side B channel and an erasing gap for erasing the side B channel.
It has a recording gap for normal recording and reproduction of the A-side channel and a recording gap for reverse recording the B-side channel.

In FIG. 2, reference numeral 13 denotes a selection switch which is operated by an operation lever 16 to which an operation button 15 protruding from the window 14 of the front panel 1 is connected. A of the second cassette tape 8
The electric circuit is configured to operate in the so-called normal dubbing mode, in which recording is performed on the double-sided channels of the first cassette tape 7, or in the so-called full-width dubbing mode, in which the playback signals of the A and B double-sided channels of the first cassette tape 7 are simultaneously recorded on the A and B double-sided channels of the second cassette tape 8. Set.

The selection switch 13 has a well-known push-push-lock mechanism, and normally sets the electric circuit to the full-width dubbing mode, and when the operation button 15 is pressed, the electric circuit is switched to the normal dubbing mode and locked. By pressing button 15 again, the lock is released and the electric circuit is switched to full-width dubbing mode.

17, 18, 19, 20, 21 in Figure 1
are a playback lever, a rewind lever, a fast-forward lever, a stop lever, and a pause lever, which are arranged to control the mechanism of the first cassette playing section 2. 22, 23, 24, 25, 26, 27 are the second
These are a recording lever, a playback lever, a rewind lever, a fast forward lever, a stop lever, and a pause lever, which are arranged to control the mechanism of the cassette playing section 3. Reference numeral 28 denotes a first detection member having a detection piece 28a for detecting the presence or absence of the erroneous erasure prevention lug 9 for the A-side channel of the second cassette tape 8;
8b, and is rotatably provided about a shaft 28c as a fulcrum, and is biased by a spring (not shown) in a direction in which the detection piece 28a comes into contact with the lug 9. 29 is a second detection member having a detection piece 29a for detecting the presence or absence of the erroneous erasure prevention lug 11 for the B-side channel of the second cassette tape 8;
It has a blocking piece 29b for blocking the operational movement of the recording lever 22, and is rotatably provided around a shaft 29c, and is moved by a spring (not shown) in the direction in which the detecting piece 29a comes into contact with the lug 11. It is energized.

That is, these first and second detection members 28, 29
is rotated counterclockwise in FIG. 2, and as shown by the solid line, for example, one detection piece 29a
When detecting the absence of the lug 11 and entering the recess 12, the blocking piece 29b prevents the operating movement of the recording lever 22.

By the way, a feature of the present invention is that a control piece 29d is integrally formed with the second detection member 29, and the control piece 29d is opposed to the lower surface of the stepped portion 16a formed on the operation lever 16 of the selection switch 13. When the operation lever 16 is pressed and the selection switch 13 is set to the normal dubbing mode, the second detection member 29 is forcibly rotated to the position where the presence of the lug 11 is detected through the stepped portion 16a and the control piece 29d. The point is that it is configured to move.

In the figure, 30 and 31 are reel spindles for the first cassette tape, and 32 and 33 are reel spindles for the second cassette tape. 34 and 35
is a capstan and pinch roller for the first cassette tape, and 36 and 37 are a capstan and pinch roller for the second cassette tape.

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

(i) Full-width dubbing operation When the operation button 15 is not operated, the selection switch 13 switches the electric circuit to the full-width dubbing mode. Therefore, when the first cassette tape 7 is installed in the first cassette playing section 2 and the second cassette tape 8 is installed in the second cassette playing section 3, the lugs 9, 11 of the second cassette tape 8 for preventing accidental erasure are removed. The first detection member 28 and the second detection member 29 are in a state where the presence or absence of is detected by the first detection member 28 and the second detection member 29.

That is, the presence or absence of the lug 9 for the A-side channel is detected by the first detection member 28, and the presence or absence of the lug 11 for the B-side channel is detected by the second detection member 29.
Detected at

Now, if there is no lug 9, the detection piece 28a of the first detection member 28 will enter the recess 10, and the blocking piece 28b will prevent the operation movement of the recording lever 22.
If the other lug 11 is not present, the second detection member 2
Since the detection piece 29a of No. 9 enters the lug 12 and the blocking piece 29b prevents the operation movement of the recording lever 22, the recording lever 22 can be operated only by the first detection member 28 and the second detection member 29. This is limited to the case where it is detected that there are corresponding lags 9 and 11, respectively.

In this way, the lugs 9 of the second cassette tape 8,
11 is detected, the recording lever 22 is allowed to be operated. Therefore, by operating the recording lever 22, the second cassette tape is put into the recording state, and the first cassette tape is put into the playback state. Thus, the reproduced signals of the A and B double-sided channels of the first cassette tape 7 can be dubbed over the full width of the A and B double-sided channels of the second cassette tape 8.

(ii) Normal dubbing operation By pressing the operating button 15, the selection switch 13 switches the electric circuit to the normal dubbing mode, and the operating lever 16 is locked in the operating position.

The second detection member 29 is forcibly rotated by the stepped portion 16a of the operating lever 16 to the position where the presence of the lug 11 for the B side is detected (the position shown by the chain line in FIG. 2). The blocking piece 29b of the second detection member 29 is in a state where it does not block the operation movement of the recording lever 22.

On the other hand, since the first detection member 28 detects the presence or absence of the lug 9 for the A side, the first detection member 28 eventually
By detecting that there is a lug 9 to which 8 corresponds, operation of the recording lever 22 is permitted.
By operating the recording lever 22, the second cassette tape is put into the recording state, and by putting the first cassette tape into the playback state, the playback signal of the A-side channel of the first cassette tape 7 is transferred to the second cassette tape.
Normal dubbing can be performed on the A-side channel of the cassette tape 8.

(g) Effects of the Invention Since the present invention is configured as described above, valuable content has already been recorded on the B-side channel of the second cassette tape, and in order to prevent erasure of this B-side channel, erroneous erasure is performed. If there is no protective lug, the recording state of the second cassette tape will be blocked even if the electrical circuit is switched to full-width dubbing mode by the selection switch, making it impossible to accidentally erase the recorded contents of the B-side channel. In this case, by switching the selection switch to the normal dubbing mode, it is possible to perform a normal dubbing operation between the A-side channels.

As described above, according to the present invention, a full-width dubbing operation can be performed without error depending on the presence or absence of a lug on the second cassette tape, which is practically useful.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a schematic structure of a dubbing cassette tape recorder according to the present invention, and FIG. 2 is a schematic side view thereof. 2...First cassette performance section, 3...Second cassette performance section, 7...First cassette tape, 8...Second cassette tape, 9, 11...Rag for preventing accidental erasure, 13...Selection switch , 16...operation lever, 22...recording lever, 28...first detection member, 29...second detection member.

Claims (1)

[Claims] 1. In a dubbing cassette tape recorder that records the playback signal of a first cassette tape loaded in a first cassette playing section onto a second cassette tape loaded in a second cassette playing section, side A of each cassette tape is recorded. a selection switch for setting an electric circuit to normal dubbing mode for channels or full width dubbing mode for double-sided channels A and B; operating means for switching the selection switch; and side A and B of the second cassette tape.
A first detection member and a second detection member are provided for detecting the presence or absence of a lug for preventing accidental erasure of the surface channel, and the first and second detection members each operate independently in response to the presence or absence of a corresponding lug. It is configured to control the recording operation of the second cassette performance section, and when the selection switch is switched to the normal dubbing mode by operation of the operating means, the second detection member detects that there is a corresponding lag. The recording operation of the second cassette playing section is controlled by the first and second detection members when the selection switch is set to the full-width dubbing mode, and when the selection switch is set to the normal dubbing mode. A dubbing cassette tape recorder characterized in that the recording operation of the second cassette performance section is sometimes controlled only by the first detection member.