JPS58175111A - Tape recorder - Google Patents

Abstract

PURPOSE:To shorten the tape required for automatic sound recording adjustment and to form automatically an intermusic space, by providing an erasing head in the position where a tape passes after a sound recording and reproducing head at the automatic sound recording adjustment time and erasing test signal for automatic sound recording adjustment recorded on the tape. CONSTITUTION:When the time of erasure impossibility after the end of automatic sound recording adjustment is elapsed, an erasing head 4 for reverse direction is returned from a forward-side track 1F to a reverse-side track 1R when a point E of a tape 1 comes to the position of a sound recording and reproducing head 2, and running of the tape 1 is stopped, and the tape recorder becomes the pause state. Thus, the test signal recording between points B and D on the tape 1 is erased automatically, and therefore, it is unnecessary to rewind the tape 1 for the purpose of erasing the test signal after the adjustment. The test signal between points B and D on the tape 1 is erased by the erasing head 4, and the test signal between points D and E on the tape is erased by an erasing head 3, and non-signal is recorded between points B and E on the tape 1, and thus the intermusic space is formed automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder equipped with an automatic recording adjustment device.

Some tape recorders are equipped with an automatic recording adjustment device that records a test signal on a tape using a recording/playback head, plays it back, and automatically adjusts the recording level, bias, etc. based on the playback signal.

Conventionally, in tape recorders equipped with such an automatic recording adjustment device, the test signal from when automatic recording adjustment was performed remains on the tape, which is very inconvenient, so after the adjustment is completed, the tape is wound to the adjustment start point. I was trying to put it back into recording standby mode.

However, rewinding the tape to the adjustment start point after the adjustment is completed in this way causes a time loss, and it is necessary to detect the adjustment start point. This is not desirable from the viewpoint of creating a space between songs and the previous song.

This invention has been made in view of the above points, and an object of the present invention is to shorten the time required for automatic recording adjustment in the above-mentioned tape recorder, and also to be able to automatically create spaces between songs. do.

Therefore, the tape recorder according to the present invention is provided with an erasing head at a position where the tape passes after the recording/playback head during automatic recording adjustment, and the erasing head erases the automatic recording adjustment test signal recorded on the tape. It was designed to do so.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram of an auto-reverse type tape recorder showing an embodiment of the present invention.

As shown in FIG. 2, this tape recorder includes a recording/playback head 2 for recording information on a tape 1 and reproducing the recorded information, and a forward direction (direction of arrow P).
and an erase head 4 for the reverse direction (arrow Q direction). In addition, recording/playback head 2
is a combination head that has separate recording heads and playback heads.

These recording/playback heads 2 and erasing heads 6 and 4 can each move up and down or rotate to be displaced to the position shown by the solid line and the position shown by the imaginary line in FIG. It looks like this.

That is, during automatic recording adjustment, when the tape 1 runs in the forward direction (arrow P direction), the erasing head 4 is displaced to the position shown in the imaginary line (trunk 1F side), and the tape 1 is moved in the reverse direction (arrow Q direction). direction), the erasing head 6 is displaced to the position shown in the imaginary line (toward the trunk 1R side), and the tape 1 is disposed at a position where the recording/playback head 2 also passes later, and the erasing head 6 is moved to the position shown by the imaginary line (toward the trunk 1R side). It serves to erase the recorded test signal.

In this way, by arranging the existing erasing heads 3 and 4 so that they can be displaced, there is no need to separately provide a new erasing head in order to carry out the present invention. Of course, this is a good thing.

Returning to FIG. 1, the microprocessor 5 is a control unit that controls recording, playback, automatic recording adjustment, etc. of this tape recorder.

When the test switch 6 for instructing the start of automatic recording adjustment is operated, the microprocessor 5 outputs a drive signal DF to the head drive device 7 if the adjustment trunk (test trunk) is a reverse track; If the test trunk is a forward trunk, a drive signal DR is output to the head drive device 8.

These head drive devices 7 and 8 each include an electromagnetic plunger or the like, and as shown in FIG. 5, the head drive device 7 reverses the erasing head 3 from the forward trunk 1F when the drive signal DF is input. When the drive signal DR is input, the head drive device 8 displaces the erasing head 4 to either the reverse side trunk 1R or the forward side trunk 1F.

Furthermore, when the test switch 6 is operated, the microprocessor 5 outputs the test start signal TE via the delay circuit 10 to the test signal generation circuit 11 and the bias oscillator (O8C) 18, and also performs recording. Start signal R
E is output to the erase signal generation oscillator (08C) 19.

The delay circuit 10 receives the test start signal TE from the microprocessor 5 for the time required for the tape 1 to travel between the recording/playback head 2 and the erasing head 3 or 4 (hereinafter referred to as the "non-erasable time"). Output with a delay.

The test signal generation circuit 11 generates a test signal when the test start signal TE is input, and passes the test signal to the recording amplifier 16 via the changeover switch 12 which switches from the contact a side to the contact side in synchronization with the test start signal TE. Output to.

The recording amplifier 16 amplifies the test signal TS from the test signal generation circuit 11 and outputs it to the recording/playback head 2 via the ear strap 14.

Then, the test signal Ts recorded on the tape 1 by this recording/playback head 2 is immediately played back by this recording/playback head 2, and the playback signal ps is amplified by a playback amplifier 15 and detected by a detection circuit 16. After that, A/D
A-to-D conversion is performed by conversion i17 and input to the microprocessor 5 as playback data PB.

Thereby, the microprocessor 5 outputs the playback data PB.
A correction signal SA for correcting the recording level based on is output to the recording amplifier 16. At the same time, although not shown, the recording bias is also corrected using a well-known method.

On the other hand, the bias oscillator 18 oscillates when the test start signal TE is input from the delay circuit 10, and the oscillator 18 oscillates when the micro processor 5 also oscillates when the recording start signal RE is input. VA, AC bias signal/erasing signal VB, selector switch 20, 2
1 to erase heads 6 and 4.

Here, the oscillator 18 and the changeover switch 20 constitute an erase signal supply circuit for causing the erase head 6 or 4 to erase the test signal recorded on the tape during automatic recording adjustment. The AC bias VB from the oscillator 19 is also output to the recording/playback head 2 via the bias adjustment circuit 20.

The changeover switches 20 and 21 are interlocked, and are switched to the contact a side when the test truck is the forward side trunk, and to the contact side when the test trunk is the reverse side truck.

The microprocessor 5 ends the test when the predetermined test signal has been output, stops outputting the test start signal TE, and then runs the tape 1 continuously for the non-erasable time to. After the elapse of time, the output of the drive signals DF and DR is stopped, and the tape 1 is controlled to stop running and enter a pause state.

Next, the operation of the embodiment configured as described above will be explained, taking as an example the case where automatic recording adjustment of the forward side trunk is performed.

First, when the test switch 6 is operated, the drive signal DR is output from the microprocessor 5, and the head drive device 8
The erase head 4 for the reverse direction is displaced to the forward side trunk 1F as shown by the imaginary line in FIG.

At the same time, the microprocessor 5 receives the test start signal TE.
and a recording start signal RE, and at the same time controls the drive device for the tape 1 (not shown) to run the tape 1 in the forward direction (direction of arrow P).

As a result, the oscillator 19 oscillates, and the AC bias VB is output to the recording/reproducing head 2, and also to the forward erase head B via the contact a of the changeover switch 21.

At this time, the test start signal TE of the microprocessor 5 is ! The test signal generation circuit 11 and the oscillator 18 are delayed by the delay circuit 10 until the non-erasable time elapses.
is not entered.

Therefore, for example, as shown in FIG.
When automatic recording adjustment (test) is started from point B, recording is performed without a signal until point B, at which the non-erasable time to has elapsed.

By doing this, when tape 1 is stopped at the end of the previous song and you want to continue making adjustments,
Even if the tape 1 is not fast-forwarded, it is possible to prevent the song part recorded between the erasing head 4 and the recording/playback head 2 from being accidentally erased.

The test start signal TE is then input to the test signal generation circuit 11 and the oscillator 18 when a non-returnable time 1o has elapsed after the start of the test.

As a result, the test signal Ts is outputted from the test signal generation circuit 11, and immediately after being recorded on the tape 1 by the recording/playback head 2, it is played back once, and based on this playback result, the microprocessor 5 A correction signal 8A is output, and the recording bias, level, etc. of the recording amplifier 16 are automatically adjusted. Note that since this automatic recording adjustment method itself is well known, detailed explanation thereof will be omitted.

At this time, the oscillator 18 oscillates and its AC bias V
A is output to the erasing head 4 through the contact af of the changeover switch 20, and since this erasing head 4 is located on the forward side trunk, the test signal Ts recorded on the tape 1 by the recording φ playback head 2 is sequentially outputted to the erasing head 4. to erase.

Therefore, as shown in FIG.
The test signal Ts recorded thereon is erased by the erasing head 4, resulting in a no-signal state.

Then, when the automatic recording adjustment is completed, the microprocessor 5 no longer outputs the test start signal TE, so the selector switch 12 is switched to the contact a side, and the test signal generation circuit 11 outputs the test signal Ts. is no longer input to the recording/playback bed 2. Note that at this time, input of the recording signal to contact a of the changeover switch 12 is prohibited.

On the other hand, the micropro sensor 5 continues to run the tape 1, and the stop of outputting the test start signal TE is delayed by the delay circuit 10, and the oscillator 18 is controlled by the AC bias VA.
Therefore, the test signal Ts is erased by the erase head 4 until the non-erasure time 1o elapses after the automatic recording adjustment is completed, and the recording/playback head 2
No-signal recording is performed.

Therefore, as shown in FIG. 4, the signal is erased from point C to point D on the tape 1 at the time when the automatic recording adjustment is completed, and no signal recording is performed from point D to point E.

Then, when the non-erasing time has elapsed after the automatic recording adjustment is completed, that is, when point E of the tape 1 shown in FIG. It returns from the 1F to the reverse side trunk 1R, the tape 10 stops running, and the tape recorder enters a pause state.

In this way, for example, the test signal TS recorded on the tape 10 from point B to point D shown in FIG. 4 is automatically erased. There is no need to rewind.

Then, erasing is performed by erasing head 4 between points B and D on tape 1, and erasing is performed by erasing head B between points D and E, so that from point B to point E on tape 10, erasing is performed by erasing head 4. becomes a no-signal state, and a space between songs is automatically created.

As explained above, according to the present invention, in a tape recorder equipped with an automatic recording adjustment device, the time required for automatic recording adjustment is shortened, and spaces between songs can be automatically formed, resulting in extremely improved operability. do.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
6 are a schematic plan view and a schematic front view for explaining the recording/playback head 2 and erasing heads 3 and 4 in FIG. 1, and FIG. 4 is an explanation for explaining the operation in FIG. 1. It is a diagram. 1... Tape 2... Recording
Re-correction head...Erase head 4 for forward direction...Erase head 5 for reverse direction...
・Microprocessor 6...Test switch

Claims (1)

[Claims] 1. In a tape recorder equipped with an automatic recording adjustment device that records a test signal on a tape using a recording/playback head, plays it back, and automatically adjusts the recording level, bias, etc. based on the playback signal, automatic recording adjustment is performed. An erasing head is provided at a position where the tape later passes through the recording/playback head, and an erasing signal supply circuit is provided for causing the erasing head to erase a test signal recorded on the tape during automatic recording adjustment. A tape recorder characterized by: