JPH0348723Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an azimuth adjustment device for a head, and particularly to an azimuth adjustment device for a reproduction head.

[Conventional technology]

Conventionally, as an azimuth adjustment device for a playback head,
A device has been proposed in which azimuth adjustment is manually adjusted by operating an azimuth adjustment operation means provided on an operation panel.

[Problem that the invention attempts to solve]

When manually adjusting the azimuth, the azimuth is normally adjusted so that the level of the high frequency component of the reproduced sound is the highest. For this reason, it is desirable for the operator to make adjustments while listening to the playback sound in the best position, but it is rare to place the device in such a position in a listening room, and most adjustments are made in unfavorable conditions. Either I was forced to do this, or I had to wear a headphone every time I adjusted the azimuth.

The present application enables azimuth adjustment by remote control in order to eliminate these inconveniences. In addition, in order to prevent operator confusion due to the increase in the number of adjustment means, when adjusting the azimuth adjustment operation means provided on the operation panel of the main body or during eject operation, the operation amount and the amount of operation that can be confirmed by the operator are displayed. The configuration is such that the azimuth position of the actual head always corresponds.

[Means to solve the problem]

A first azimuth adjustment signal, which is provided on the tape recorder main body and has an operating section configured to allow confirmation of the amount of operation that changes due to manual operation, and outputs a first azimuth adjustment signal whose level changes in response to the amount of operation. an azimuth adjustment operation means provided separately from the tape recorder main body,
a second azimuth adjustment operation means that outputs a second azimuth adjustment signal that can assume at least first, second, and third signal states in response to manual operation; and a motor-on signal _S11 and an AZ.D signal when the cassette is loaded. _S13 becomes an H signal, but if the mechanical mode changes from PLAY to STOP mode during this azimuth processing period, at that point the AZ.D signal _S13 becomes an L signal,
The display of the bar graph 16 is switched from azimuth quantity display to level quantity display.

In addition, volume azimuth processing is performed in mechanical mode.
Since it works even in STOP mode, AZ.VR
The signal S ₄ ' changes from the value 47 to the value 49 and after another second to the value 51.
The above-mentioned volume azimuth processing is performed according to the change. eject detection means for detecting an eject signal in response to an eject operation operated in mechanical mode to bring the ST disk from a performance position to an ejection position during the volume azimuth processing; and the first and second azimuth adjustment signals. azimuth control signal holding means for holding and outputting an azimuth control signal whose level changes based on the eject signal; and azimuth control means for adjusting the azimuth of the reproduction head to a position corresponding to the level of the azimuth control signal. , the azimuth control signal holding means outputs an azimuth control signal corresponding to the level of the first azimuth adjustment signal in response to a change in the level of the first azimuth adjustment signal and the detection of the eject signal; The level of the azimuth control signal is increased in response to a first signal state of the second azimuth adjustment signal, and the level of the azimuth control signal is decreased in response to the second signal state.
[Function] When the operator adjusts the azimuth using the first azimuth adjustment operation means or performs the eject operation, the operator knows the corresponding actual azimuth position of the head from the verifiable operation amount. When the azimuth is adjusted again by the second azimuth adjustment operation means, the azimuth position is varied in both directions from that position.

〔Example〕

Fig. 1 is a block diagram of an embodiment of the device of the present invention applied to a cassette tape recorder, Fig. 2 is a flowchart showing the flow of automatic azimuth processing, and Fig. 3 is an example of each operation of manual azimuth adjustment processing. The timing chart of each is shown below.

In Fig. 1, 1 is an operation panel provided on the main body of the cassette tape recorder, and on the panel 1 there are an eject switch (hereinafter referred to as eject SW) 1 ₁ for cassette ejection, and an autocarrier for automatic azimuth adjustment. Brasion switch (hereinafter referred to as auto)
CAL.SW) 1 ₂ , Tone head, 14... Recording amplifier, 15... Sine wave oscillator, 16... Bar graph, 17... A/D converter, 18... Magnetic tape.

- A mechanical mode switch (hereinafter referred to as mechanical mode SW) 1 ₃ for selecting the operation mode of the recorder, and an azimuth adjustment volume (hereinafter referred to as AZ.VR) 1 ₄ for manual azimuth adjustment are arranged, respectively.
Output signals S ₁ to _{S 4} based on these operations are sent directly or via an A/D converter 3 to each input port 4 of a microcomputer (hereinafter referred to as microcomputer) 4.
₁ and 4 ₂ , respectively. In addition, in order to display the rotational position of AZ.VR1 ₄ , an index is placed on AZ.VR1 ₄ .
A scale is also provided on the operation panel 1.

2 is a remote control box (hereinafter referred to as the remote control) for manual azimuth adjustment, and a non-lock type remote L switch (hereinafter referred to as the remote control).
A remote R switch (hereinafter referred to as remote RSW) 2 ₁ and a remote R switch (hereinafter referred to as remote RSW) 2 ₂ are respectively arranged.

The remote L signal S ₅ and remote R signal S ₆ based on these operations are output to the input port 4 ₃ of the microcomputer 4 via a well-known electrical or optical transmission means (not shown). 4 is configured to sense an L signal when these remote SWs are pressed, and to sense an H signal when they are released.

Reference numeral 5 denotes a D/A converter, which sequentially holds digital azimuth data signals _S7 which are output in time series from the output port section ₄₄ of the microcomputer 4 at the output timing described later and inputted to its input section ₅₁ . Convert the analog signal to the azimuth motor signal (below)
(referred to as AZ. motor signal) S ₈ is outputted from its output terminal 5 ₂ to the input terminal 6 ₁ of the motor control circuit 6 .

Further, the microcomputer 4 has a built-in output memory for storing the final data value of this azimuth data signal _S7 . The motor control circuit 6 is connected to this AZ.
The azimuth of the reproducing head ₁₀ is determined based on the DC voltage value of the AZ. motor signal S8 by the motor signal _S8 and the azimuth position signal _S9 from the motor rotational position detector ₈₁ input to its input terminal ₆₃ . To determine the position, a motor rotation control signal is sent from its output terminal ₆₄ .
_S10 is output to control the rotation of the motor 8. still,
The rotational position detector 8 ₁ is composed of, for example, a potentiometer.

On the other hand, a motor-on signal _S11 is inputted to the input terminal ₆₂ from the output port ₄₈ of the microcomputer 4, and based on this motor-on signal _S11 , a motor rotation control signal is input.
_S10 is output, but when the motor-on signal _S11 is an L signal, the output from the output terminal ₆₄ becomes 0 output.

The bar graph drive circuit 7 receives a level signal _S12 indicating the level of the recording/playback signal at its input terminal ₇₁ .
Furthermore, an AZ. motor signal _S8 is input to the input terminal ₇₂ , and an azimuth deflection signal (hereinafter referred to as AZ.D signal) from the output port ₄₇ of the microcomputer 4 is input to the input terminal ₇₃ . ) The bar graph 16 is controlled to selectively display the level amount or the azimuth amount based on _S13 .

The rotational force of the motor 8 is transmitted to the reproduction head 10 via the worm gear 9, and its azimuth position is adjusted by a well-known azimuth mechanism, but when the motor rotation control signal _S10 becomes zero, the rotational force of the motor 8 becomes zero. Even if the azimuth position is changed, the playback head 10 is held at the current azimuth position by the action of the worm gear 9.

A command signal _S14 from the output port ₄₆ of the microcomputer 4 is input to the input terminal ₁₅₁ of the sine wave oscillator 15, and based on this command signal _S14 , the sine wave oscillator 15 generates a sine wave standard of a predetermined frequency and a predetermined level from the output terminal ₁₅₂ . Signal S ₁₅
are output from the L channel input terminal 13 ₁ and the R channel input terminal 13 ₂ of the recording head 13 via well-known recording amplifiers 14 ₁ and 14 ₂ , respectively.

On the other hand, each reproduction signal of the LR channel reproduced by the reproduction head 10 is output from its output terminals 10 ₁ and 10 _{2 .}
is outputted from the input terminals 12 ₁ , 1 of the phase comparison circuit ₁₂ via well-known reproduction amplifiers 11 1 , 11 ₂ , etc.
₂ are respectively input. The phase comparison circuit 12 outputs a phase difference signal S ₁₆ based on the phase difference between these reproduced input signals from the output terminal 12 ₃ to the input port 4 ₅ of the microcomputer 4 via the A/D converter 17 and the like.

Note that the circuit system related to the input and output of audio signals will be omitted.

The operation of the above configuration will be explained.

Azimuth adjustment is done using Auto CAL on operation panel 1.
Auto azimuth processing by pressing SW1 ₂ , manual volume azimuth processing by operating AZ.VR1 ₄ , remote control placed on remote control 2
It is possible to carry out the remote azimuth processing using three methods: manual remote azimuth processing by operating the LSW 2 ₁ and the remote RSW 2 ₂ .

(1) First, auto-azimuth processing will be explained.

When the auto CAL.SW ₁₂ on the operation panel 1 is pressed and the auto CAL.SW signal _S2 is output, various operations necessary for recording and playback are started and recording onto the magnetic tape 18 becomes possible, as shown in Fig. 2. The operation of the flow shown in is started.

At this time, the sine wave oscillator 15 generates a sine wave reference signal S ₁₅ based on the command signal S ₁₄ from the microcomputer 4.
(400Hz in the embodiment) is sent to the recording head 13 via the recording amplifiers 14 ₁ and 14 ₂ of the L and R channels.
The same signal is recorded and played back by both channels. At the same time, microcontroller 4
Azimuth data signal S ₇ from its output port 4 ₄
6-bit center data value 100000 (10
Outputs a signal with a value of 32 in decimal numbers, and outputs a signal with a value of 32) to the playback head 10.
Bring it to the center azimuth position. Note that the correspondence between the center data value and the center azimuth position is adjusted in advance.

Next, after waiting for an operation loss time of 1 second in the embodiment until the azimuth stabilizes at the new azimuth position, judgment and processing are performed based on the phase difference information. Each sine wave reference signal of the LR channel reproduced by the reproduction head 10 is input to the input terminals 12 ₁ , 12 ₂ of the phase comparison circuit 12 via reproduction amplifiers 11 ₁ , 11 _{2 ,} etc.
are input respectively.

As is well known, the optimal azimuth position of the reproducing head 10 relative to the recording head 13 can be determined by the phase lead or lag between the reproduced sine wave signals. The phase circuit 12 outputs a phase difference signal S ₁₆ that is phase difference information between both signals to the microcomputer 4. The microcomputer 4 determines the next processing operation based on this phase difference information. In the flow shown in FIG. 2, the azimuth adjustment is finished if the phase difference is within a predetermined range. However, if it is not within the predetermined range, the step value is changed to the previous center azimuth data value 2 (10
The new azimuth data signal _S7 , which is added or subtracted by (in base number), is output to the D/A converter 5 to correct the azimuth position of the reproducing head 10. Furthermore,...
After waiting for the azimuth operation loss time, the above process is performed again, and is repeated until the phase difference falls within a predetermined range.

In addition, if the modified data falls outside the variable range of 6-bit data, or if the phase difference signal _S16
is devised so that if it is not detected, an auto azimuth processing error will occur. Incidentally, during auto-azimuth processing, the motor-on signal _S11 is set to an H signal.

(2) Next, the volume azimuth processing using _AZ.VR14 of the operation panel 1 will be explained.

DC voltage proportional to the rotation angle of AZ.VR1 ₄
The AZ.VR signal _S4 is converted into a 6-bit (in this embodiment) digital signal by the A/D converter 3 and input to the microcomputer 4. Microcomputer 4 has a value of 0
We recognize this as 64 types of data, ~63 (in decimal).

On the other hand, the A/D converted AZ.
A volume data memory (hereinafter referred to as VR memory) that stores the data value of the VR signal S ₄ ' is prepared, and is read at the timing described later. Furthermore, a timer (hereinafter referred to as azimuth timer) for limiting the azimuth processing time (3 seconds in the embodiment) is built into the microcomputer, and measures time at the timing described later. Further, an AZ.D signal S ₁₃ which is a command signal for switching the selection of the level amount display and azimuth amount display of the bar graph 16, and a motor on signal S ₁₁ which puts the motor 8 in a rotation control state are also output at timings to be described later.

Timing conditions for each operation during volume azimuth processing are listed below.

1 The timing at which the VR memory reads the data value of the AZ.VR signal _S4 ' is: - At the time of initialization by turning on the power - At the end of auto azimuth - At the rise of the eject signal _S1 (becomes the L signal in the eject signal) , ・At the end of remote azimuth processing (described later), ・When the data value of AZ.VR signal S ₄ ′ newly changes by ±2 or more with respect to the VR memory data (however, during auto azimuth processing and remote azimuth processing) ), or - When an auto azimuth processing error occurs.

2 Azimuth data signal S ₇ via output memory
・When the power is turned on, the data read into the VR memory at that time. ・When auto azimuth processing is performed, the data is based on the above flow. ・AZ.VR signal S ₄ ′ for the VR memory data.
When the data value changes by ±2 or more, the data newly read into the VR memory (however,
(excluding auto azimuth processing and remote azimuth processing), ・When ejecting, the data read into the VR memory at that time, or ・When an auto azimuth processing error occurs, at that time
The data read into the VR memory is output.

3. The operation of the azimuth timer is as follows: - It starts at the same time as the azimuth data signal _S7 is output, and measures time for 3 seconds.

・New azimuth data signal during the above 3 seconds
When _S7 is output, it is reset at that point and starts measuring time for 3 seconds again.

4. The motor-on signal _S11 is an H signal when the azimuth timer is measuring time, and an L signal in other cases.

5 AZ.D signal S ₁₃ indicates that the azimuth timer is measuring time and the mechanical mode is PLAY or
When in REC-PLAY mode, the H signal is taken, and in other cases, the L signal is taken.

Hereinafter, an example of these operations will be explained according to the timing chart of FIG. 3a. In addition, ○ in the diagram
The numbers inside the marks indicate the order of operation, and data values are displayed using decimal numbers.

First, as an initial condition, the VR memory has a value of 24.
The AZ. motor signal S ₈ (this is the DC voltage value held and output after D/A conversion of the azimuth data signal S ₇ , but for simplicity, it is shown as the digital data value before conversion) is Assume that the value is held at 34, which is adjusted by auto azimuth processing.

In this state, first the mechanical mode is REC-PAUSE.
to REC-PLAY, but this mode change does not cause any other state changes. Next, move AZ.VR1 ₄ and change it from the VR memory data value 24 to a value 22 that gives a change of ±2 or more, the value 22 will be read into the VR memory, and at the same time the value 22 will be output as azimuth data. Therefore, the AZ. motor signal _S8 is newly held at this value 22. At this time, the azimuth timer starts and the motor on signal S ₁₁ and AZ.D signal
_S13 becomes an H signal, the motor 8 enters the rotation control state, and the bar graph 16 enters the azimuth amount display state.

Next, when AZ.VR1 ₄ is changed to the value 20,
The VR memory data value and the AZ. motor signal _S8 each have a value of 20, the azimuth timer is reset, and a new 3 second time measurement starts from this point. When this 3 second time measurement is completed, the motor-on signal _S11 and the AZ.D signal _S13 become L signals, the rotation control state of the motor 8 is released, and the bar graph 16 is switched to the level amount display again.

Then, when AZ.VR1 ₄ is moved to the value ₂₂ , _{the VR} memory data and AZ.
Each becomes an H signal. During this process, when the mechanical mode is changed from REC-PLAY to STOP mode, the AZ.D signal _S13 becomes an L signal, but the motor-on signal _S11 continues to be an H signal until the azimuth timer finishes counting 3 seconds.

Next, after the azimuth timer has finished measuring, AZ.
When VR1 ₄ is changed to the value 24, the VR memory data and AZ. motor signal S ₈ also become the value 24, respectively.
The azimuth timer starts measuring time again, but
One second later, when eject is performed and the eject signal _S1 becomes an L signal, the AZ at that point.
The data value of the VR signal S ₄ ' is read into the VR memory and is output as an azimuth data signal S ₇ , and volume azimuth processing is performed during measurement by the azimuth timer.

(3) Next, remote azimuth processing will be explained.

Remote azimuth processing is performed using the non-lock type remote LSW 2 ₁ placed on the remote controller 2.
This is done by pressing the remote _RSW22 .

The operating conditions for each operation during remote azimuth processing are listed below.

1 Remote azimuth processing is done in mechanical mode.
Operates only in REC-PLAY or PLAY mode.

2 Data is not read by VR memory during remote azimuth processing.

3 The data value of the azimuth data signal _S7 takes a value obtained by changing the data value of the output memory by +2 (or -2) in response to the falling edge of the remote L signal _S5 (or remote R signal _S6 ). ,
The updated data value is stored in the output memory, but if this L state continues, the L
When 0.5 seconds have passed after the change to the state, and every 0.2 seconds thereafter, the value is updated by +2 (or -2), and the memory value of the output memory is also updated at the same time (However, when auto azimuth processing is performed, (Except during volume azimuth processing).

4. The azimuth timer starts simultaneously with the output of the azimuth data signal _S7 by remote SW operation and measures time for 3 seconds, but this timer operation is limited to when the mechanical mode is REC-PLAY or PLAY mode.

The above conditions are added to the conditions for the volume azimuth processing described above.

Hereinafter, an example of these operations will be explained according to the timing chart shown in FIG. 3b.

As an initial condition at this time, it is assumed that the value 24 is similarly stored in the VR memory, and the value 34 adjusted by auto-azimuth processing is held as the AZ. motor signal _S8 . In this case, the data in the output memory also has a value of 34.

In this state, first the mechanical mode is REC-PAUSE.
to REC-PLAY, but there are no other changes to the status. Next, remote LSW2 ₁ is 1
When pressed for seconds, the value 36 obtained by adding value 2 to the data value 34 in the output memory at the moment of pressing is output as the azimuth data signal _S1 , and this value is held as the AZ. motor signal _S8 . The output memory is also updated with this data value. At the same time, the azimuth timer starts measuring time for 3 seconds, the motor on signal S ₁₁ and the AZ.D signal S ₁₃ each become an H signal, the motor 8 enters the rotation control state, and the bar graph 16 displays the azimuth. state.

Furthermore, after 0.5 seconds the value becomes 38, and after that the value becomes 0.2.
The values 40 and 42 are sequentially output as the azimuth data signal _S7 at second intervals, and each time the data in the output memory is rewritten and the hold value of the AZ. motor signal _S8 is changed. Further, the azimuth timer repeatedly restarts in synchronization with the output of the azimuth data signal _S7 .

Next, when remote RSW2 ₂ is pressed for 0.3 seconds after 2 seconds during this remote azimuth processing,
Similarly, the AZ. motor signal _S8 is subtracted by a value of 2 to take a value of 40, and the azimuth timer is restarted and starts measuring time for 3 seconds. After this remote azimuth processing, remote RSW 2 ₂ is activated again.
When pressed for 0.6 seconds, the AZ. motor signal _S8 takes a value of 38, and after another 0.5 seconds, it takes a value of 36, and remote azimuth processing is performed until the azimuth timer finishes counting for 3 seconds. However, after 2 seconds while the azimuth timer is operating, the mechanical mode is activated.
When the mode changes from REC-PLAY to STOP, the azimuth timer ends time measurement and remote azimuth processing ends. At this time, AZ.
The value 36 is held as motor signal _S8 , but the next eject operation will change the value at that point.
The data value 24 of _AZ.VR14 is read into the VR memory and output as azimuth data _S7 , the azimuth timer is started, and the volume azimuth processing described above is performed.

(4) Finally, an example of an operation in which remote azimuth processing and volume azimuth processing are performed in parallel will be explained with reference to the timing chart in FIG. 3c.

Assume that the initial conditions at this time are that the value 24 is stored in the VR memory, and the value 34 adjusted by auto azimuth processing is held as the AZ. motor signal _S8 .

When the eject operation is performed here, the data value 24 of the AZ.VR signal S ₄ ' at that point is read into the VR memory, and the azimuth data signal
It is output as _S7 , the azimuth timer is started, and the volume azimuth processing described above is performed.
Even if the remote LSW 2 ₁ is pressed for 1 second during this period, it will be ignored. Next, finish the eject operation and the mechanical mode changes from STOP to PLAY mode.
When remote RSW 2 ₂ is pressed for 0.8 seconds, _the output memory data and the hold value of AZ. Remote azimuth processing is performed.

At the end of this remote azimuth processing, the VR memory takes in the data of the AZ.VR signal S ₄ ′ again,
Its value will be 49. In addition, in the timing chart example shown in the figure, AZ.VR during remote azimuth processing.
1 ₄ is changed from the value 24 to the value 49.

Next, when AZ.VR1 ₄ is changed to the value 47,
The VR memory reads the value 47 and outputs it as azimuth data _S7 , and the volume azimuth processing described above for 3 seconds is performed. From this OP
Changing to REW does not affect its operation. During this time, the AZ.D signal S ₁₃ continues to output the L signal, so the bar graph 16 continues to display the level.

It should be noted that the present invention is not limited to the embodiments, and it is also possible to configure the azimuth adjustment amount by using a touch switch instead of the azimuth adjustment volume on the operation panel, or to use a hardware configuration instead of the microcomputer. Various aspects are possible.

[Effect of idea]

According to the above device of the present invention, in addition to the manual adjustment operation means provided on the tape recorder main body, the azimuth can be adjusted by the manual adjustment operation means provided separately from the main body. The user can always adjust the azimuth while listening to the playback sound at the best position. At this time, the correspondence between the confirmable operation amount of the manual adjustment operation means provided on the main body and the actual azimuth position of the head is temporarily broken, but the azimuth position of the head is corrected in conjunction with the eject operation, and this correspondence is restored again. Relationships are restored. Therefore, when the operator plays another tape and adjusts the azimuth using the remote control, the azimuth position at the start of the adjustment has returned to the position corresponding to the amount of operation mentioned above, so the operator starts the azimuth adjustment. There is no need for confusion due to not being able to visually confirm the azimuth position when

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of one embodiment of the device of the present invention;
FIG. 3 shows a flow chart and a time chart, respectively, for explaining the present invention. 1...Operation panel, 1 ₄ ...Azimuth adjustment volume,
2...Remote Koitor Roll Box, 3...A/D
Converter, 4...Microcomputer, 5...D/A
converter, 6... motor control circuit, 7... bar graph drive circuit, 8... motor, 9... worm gear, 10...
Playback head, 11... Playback amplifier, 12... Phase comparison circuit, 13... Recording head, 14... Recording amplifier, 1
5...Sine wave oscillator, 16...Bar graph, 17...
A/D converter, 18...magnetic tape.

Claims (1)

[Claims for Utility Model Registration] A first tape recorder, which is provided in the main body of the tape recorder and has an operating section configured to enable confirmation of the amount of operation that changes due to manual operation, and whose level changes in accordance with the amount of operation. a first azimuth adjustment operation means for outputting an azimuth adjustment signal; and a first azimuth adjustment operation means provided separately from the tape recorder main body,
a second azimuth adjustment operation means for outputting a second azimuth adjustment signal that can assume at least first, second, and third signal states in response to manual operation; eject detection means for detecting an eject signal in response to an eject operation that is performed in response to an eject operation; and an azimuth that holds and outputs an azimuth control signal whose level changes based on the first and second azimuth adjustment signals and the eject signal. control signal holding means; and azimuth control means for adjusting the azimuth of the reproduction head to a position corresponding to the level of the azimuth control signal, and the azimuth control signal holding means controls the level change of the first azimuth adjustment signal. and outputting an azimuth control signal corresponding to the level of the first azimuth adjustment signal in response to the detection of the eject signal, and adjusting the level of the azimuth control signal according to the first signal state of the second azimuth adjustment signal. An azimuth adjustment device for a head, characterized in that the azimuth adjustment device is configured to increase the level of the azimuth control signal and decrease the level of the azimuth control signal depending on the second signal state.