JPS61253607A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To simplify an operation of each operation mode containing a sound recording mode and a temporary stop mode, and to prevent a noise from being generated at the time of switching, by using a slide type switch for always setting a sound recording mode or other mode through a stop mode. CONSTITUTION:An operating part has a slide lever 23, and this lever 23 is brought to a slide operation to each mode position of sound recording REC, stop STOP, and reproduction PLAY in accordance with each operation mode. In this case, the sound recording or reproducing mode is always set through the stop mode. Also, in accordance with a slide operation of the slide lever 23, changeover switches 1-3 are brought to a switching operation, but in case of the sound recording and the stop modes, the changeover switches 1-3 are set to the same position. Even in case of the stop mode, a temporary stop mode in which a bias signal and an erasing current remain applied is obtained, and when the slide operation to the reproducing mode is executed through the stop mode, it is also possible to stop a supply of the bias signal and the erasing current, therefore, the operation of each operation mode containing the sound recording mode and is temporary stop mode can be simplified extremely.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a magnetic recording and reproducing device suitable for use as a dictation recorder.

[Technical background of the invention and its problems]

Recently, I pre-recorded a manuscript for creating a document,
The contents of this recording are later reproduced and inputted into a word processor or the like to create a document, and a so-called dictation recorder is used for this purpose.

Conventionally, most of these types of devices have been portable ones that use batteries as a power source, and therefore, electromagnetic erasing heads have been
A DC saturation erasing method is used, in which DC current is supplied to the erasing head only during ringing or high-speed erasing, and no direct current is supplied to the erasing head in other modes, such as stop or play mode.

By the way, such dictation recorders usually have a so-called pause mode in which the tape is stopped by separating the vinyl roller and capstan while the tape and head are in contact with each other. The desired recording is performed by alternately repeating the pause mode and the recording mode.

However, if such pause mode and recording mode are repeated, the tape will have areas that have been saturated magnetized by the erase head during recording and areas that have not been erased during pause mode. When playing back, a large amount of noise occurs at the boundary between the saturated erased part and the unerased part, that is, the boundary between recording mode and pause mode, and this can make the playback content very difficult to hear. .

Therefore, as shown in Japanese Patent Publication No. 59-42366, even if the recording operation and the pause operation in the recording state are repeated, the recording bias oscillator is always kept in the operating state during the operation between these operations. A device has been proposed that prevents a click sound from being recorded when switching operations.

However, in this case, the switch S1. S
, in order, and from here, to put the recording bias oscillator into the operating state, further operate the switch S, and then, to perform the playback operation, operate the -1 switch S, and then put it into the stopped state. Since the switch S must be operated, many switch operations are required to maintain the operation of the bias oscillator in the paused state, and even more switch operations are required if recording and playback are repeated. This makes the operation complicated and troublesome.
There is a point where it becomes easy to not only become ζ but also make mistakes.

Furthermore, the amplifier system remains powered on even when the device is temporarily stopped, consuming unnecessary power, which shortens the battery life and has the disadvantage of being economically disadvantageous. be.

[Purpose of the invention]

This invention was made in view of the above circumstances, and it is possible to set each operation mode with simple operations, and also prevents noise generation when switching between recording and pause modes among these operations. It is an object of the present invention to provide a magnetic recording/reproducing device that can also reduce power consumption.

[Summary of the invention]

The magnetic recording/reproducing device according to the present invention uses a slide type switch that always sets the recording mode or another mode via the stop mode.

When operating between stop mode and recording mode using a switch, it is possible to set a pause mode in which the bias signal and erase current are kept applied even in stop mode, and when operating in a mode other than recording mode via stop mode, the above The supply of the bias signal and erase current is stopped, and the power to the amplifier system is turned on and interrupted every time the recording mode is set to the pause mode.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the circuit configuration of the same embodiment, and in the figure,
Reference numerals 1, 2.3 are recording/playback selector switches, and these switches 1, 2.3 each have fixed contact pieces R, , S, P and a movable contact piece N. In recording mode and stop mode, the movable contact piece N is The movable contact piece N is interlocked and switched between the contact pieces S and P in the reproduction mode. (The drawing shows the state in which the movable contact piece N is in the recording/stop mode position.) 4 is a microphone, and this microphone 4 is composed of a microphone amplifier 5, a recording amplifier 6, a recording equivalent circuit 7゜mis+-ting circuit 8 ．． It is connected to a recording/reproducing head 10 via an AC bias oscillation circuit 9. This is to remove noise such as operation sounds. Also, the AC bias oscillation circuit 9
A switching transistor 11 and the changeover switch 3 are connected to the terminals, respectively, and an AC bias signal is output based on the ON operation of the transistor 11.

The recording/reproducing head 10 has one terminal connected to the AC bias oscillation circuit 9 connected to the contact P of the changeover switch 1, and the other terminal connected to the contact R of the switch 1.

This changeover switch l connects the contact piece S to ground and connects the contact piece R to the ground.
The preamplifier is 12% polyamide 13, the metering circuit is 14. It is connected to a speaker 16 via a power amplifier 15.

Reference numeral 17 denotes an erasing head, and a switching transistor 18 is connected to this erasing head 17, and a DC erasing current is applied by turning on the transistor 18.

On the other hand, 19 is a CPU, and this CPU 19 is an input terminal I
NI, IN2, output terminal, OU'rl, 0UT
2, 0UT3, 0UT4° have a power terminal Vcc and a ground terminal ωψ.

For example, (Sharp 8M-551) is used for this ζCP019. Then, the input terminal I of this CPU 19
Connect the selection switch 20 to NI and input terminal I.
The contact piece B of the changeover switch 2 is connected to N2. Here, the selection switch 20 distinguishes between the recording mode and the pause mode, and is turned on in the recording mode. Further, the changeover switch 2 has a contact piece S grounded and is used to distinguish between recording mode and playback mode.

Further, the above muting circuit 8.14 is connected to the output terminal 0UTI of the CPU 19, the switching transistor 11.18 is connected to the output terminal 0UT2Jζ, and the output terminal OUT
3 is connected to a DC motor 22 via a motor servo circuit 21.
, the above amplifier 5,612.1 is connected to the output terminal OUT 4.
! ? are connected to each other. Here, the output terminal 0UT1 is designed to generate the operational output of the muting circuit 8.14 when the power supply is interrupted. In addition, the output terminal OUT2 generates an output that turns on each transistor 11 and 18 when switching from stop mode to recording mode or from recording mode to stop mode, and when switching from stop mode b to recording mode, in this case, playback mode. In switching transistor 11
．． It is designed to generate an output that turns off 18. Further, the output terminal OUT 3 is configured to generate an output for driving the motor 22. Output terminal OUT 4 is designed to generate an output to turn on the power of each amplifier when switching from stop mode to recording or playback mode, and to generate an output to turn off the power when switching from recording or playback mode to stop mode. There is.

Note that the CPU 19 automatically terminates the output from the output terminal OUT 2 when the temporary stop mode continues for a predetermined period of time, for example, several minutes.

Next, Figure 2 shows the operating section of such a device.
A slide lever 23 is provided, and this lever 23 is slid to the recording (RBC), stop (s'rop), and playback (PL7VY) mode positions according to each operation mode. In this case, the recording or playback mode is always set via the stop mode. In addition, the changeover switches 1, 2.3 are switched in accordance with the sliding operation of the slide lever 23, but in the fs sound and stop mode, the changeover switches 1, 2.3 are operated as described above.
are set at the same position.

In addition, Figures 3 and 4 show the state of each mechanical part when it is set to each operation mode.
As shown in the figure, recording/playback head 10 right and erasing head 1
7 contact the tape 24, the pinch roller 25 is pressed toward the capstan 26 side and runs on the tape 24. In the stop mode, as shown in FIG. 4, the pinch roller 25 and capstan 26 are separated from each other with both the recording and reproducing head 10 and the erasing head 17 in contact with the tape 24, and the tape is stopped running, resulting in a so-called temporary stop state. I have to.

Next, its effect will be explained.

First, 2nd rli! Record the slide lever 23 shown in J (
R] 3C) When mode lζ, selector switch 1, 2.3
is set to the state shown, and the switch 20 is also turned on.

Then, as shown in FIG. 3, the recording/reproducing head 10 and the erasing head 17 come into contact with the tape 24, and at the same time the pinch roller 25 is pressed toward the capstan 26.

In this state, the output from the output terminal OUT 2 of the CPU 19 turns on the transistors 11 and 18, and the operation of the AC bias oscillation circuit 9 applies an AC bias signal to the recording/playback head 10, and an erase current is applied to the erase head 17. is given, and the output of the output terminal OUT 3 causes the motor 22 to rotate at a constant speed via the motor servo circuit 21, and the output of the output terminal OUT 3 also turns on the power to the amplifiers 5 and 6. . In this case, the output of the output terminal OUT 1 activates the signal processing circuit 8, and in order to avoid recording the pop noise that occurs when the power is turned on to the amplifiers 5 and 6, the amplifiers 5 and 6 are turned on after the power is turned on. I am trying to keep muting working until 6 becomes waxy. Note that 27 in the figure represents the rise of the above-mentioned AC bias signal and erase current, so
In this state, the tape 24 is run and input from the microphone 4 is recorded.

From this state, stop the slide lever 23 shown in Fig. 2 (
5TOP) When the switch 20 is slid to the mode position, the switch 20 is turned off and the CPU 19 is put into a temporary halt state.

In this case, as shown in FIG. 4, the pinch roller 25 is separated from the capstan 26 while the recording/reproducing head 10 and erasing head 17 remain in contact with the tape 24.

In this state, the output from the output terminal OUT 3 of the CPU 19 disappears, the motor 22 is stopped, and the output terminal OUT
The power to the amplifiers 5 and 6 is also turned off by the power off output i of the amplifier 4. In this case, an output is generated from the output terminal 0UTl and the metering circuit 8 is operated in the same manner as described above so that the pop noise generated by the amplifier 5.6 is not recorded.

However, in this case, since the recording mode is transitioning to the stop mode, an output is generated from the output terminal OUT2, transistors 11 and 18 remain on, and the AC bias signal and erase current are continuously applied.

From this state, when the slide lever 23 shown in FIG. 2 is again slid to the recording (REC) mode position, the motor 22 and amplifiers 5 and 6 are operated as described above, and the recording state is entered.
Furthermore, the slide lever 23 shown in FIG. 2 is stopped (STO
P) When the slide operation is performed to the mode position, the motor 22% amplifiers 5 and 6 become inoperative and enter a temporary stop mode while the AC bias signal and erase current are continuously applied as described above.

Therefore, by repeating the same operation, the recording and pause modes can be alternately obtained while the AC bias signal and erase current are continuously applied. In this case, if you leave it set to pause mode, it will automatically turn off after a predetermined period of time, for example, several minutes.
The output of the output terminal OUT 2 of the CPU 19 is terminated,
From this point on, the AC bias signal and erase current are also stopped.

On the other hand, when the slide lever 23 shown in FIG. 2 is slid from the recording state to the playback (PLAY) mode position, the transistor 11 is transferred from the output terminal OUT 2 of the CPU 19 to the playback mode position via the stop (STOP) mode position. An output is generated which turns off the .18, thereby stopping the supply of the AC bias signal and erase current. Also, after that, from this playback mode, the slide lever 23
If you operate it to the stop mode position, it will not be able to temporarily stop in this case and will be in a normal stopped state.

Therefore, if you use a slide switch that always sets the recording mode or playback mode via the stop mode, the slide operation between the recording mode and the stop mode will apply the bias signal and erase current even in the stop mode. You can obtain a pause mode in which the device remains in play mode, and if you slide from stop mode to playback mode, you can also stop supplying the bias signal and erase current, so you can operate each operation mode including recording mode and pause mode. This is extremely easy to do, and can also prevent noise from occurring when switching between recording mode and pause mode. In addition, the power to the amplifier system is turned on and interrupted every time the recording mode is switched to the pause mode, so there is no wasted power consumption, and this can extend battery life, especially when using batteries as a power source. .

Next, FIG. 5 shows only the essential parts of another embodiment of the invention.

In this case, the CPU 19 connects the switching transistor 11 that energizes the AC bias oscillation circuit 9 and the switching transistor 18 that energizes the erase head 17 to different output terminals 0UT21 and OUT' 22, and outputs each transistor 11.18 from an independent output t. On.

I'm trying to get some time off. Other details are the same as in FIG.

Therefore, the same effect as described above can be expected even if the ζ is applied in this manner.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented with appropriate modifications without changing the gist.

〔Effect of the invention〕

According to the invention tζ, by using a sliding switch that always sets the recording mode or other mode via the stop mode, it is possible to easily operate each operation mode including the recording mode and the pause mode. Furthermore, since the bias signal and erase current can be kept applied in the pause mode, it is possible to prevent the occurrence of noise when switching between the recording mode and the recording mode.

Furthermore, since the amplifier power can be turned off each time the recording mode is switched to the pause mode, power consumption can be reduced.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of the present invention, and FIG.
The figure is a schematic block diagram showing the slide switch used in the same embodiment, FIGS. 3 and 4 are schematic block diagrams showing the mechanical part in the recording mode and pause mode of the same embodiment, and FIG. FIG. 3 is a schematic configuration diagram showing main parts of another embodiment of the present invention. 1.2.3... Selector switch 4... Microphone φ, 6, 12.15... Amplifier 7... Recording equivalent circuit 8, Engineering 4... Muting circuit 9... AC bias oscillation Circuit 10...recording/playback head 11.18...switching transistor 13-...
Polium 16...Speaker 17...Erase head 19.+a CP U3O...Switch
21...Motor servo circuit 22...Motor
23...Slide switch 24...Tape
25...Pinch roller 26-...Capstan Figure 1 Figure 2 Figure 3

Claims (2)

[Claims] (1) In devices that use a sliding switch that always sets the recording mode or other mode via the stop mode, when the switch is operated between the stop mode and the recording mode, the bias signal and It is possible to set a pause mode in which the erase current continues to be applied, and when the operation to other modes via the stop mode is performed, the supply of the bias signal and the erase current is stopped, and the mode is changed from the recording mode to the pause mode. A magnetic recording/reproducing device characterized in that power to an amplifier system is cut off for each setting. (2) The magnetic recording and reproducing device according to claim 1, further comprising means for automatically stopping the supply of the bias signal and erasing current when the pause mode remains set for a predetermined period of time. Device.