JPS61255503A - Tape recorder - Google Patents

Abstract

PURPOSE:To obtain a simple and inexpensive tape recorder which is also capable of dubbing by securing such a constitution where just a single reproduction amplifier is used and a reproduction level control means corresponding to the 1st or 2nd head can be selected with different logical commands of a control means. CONSTITUTION:A control means 20 delivers different logical commands in response to the reproduction state of the 1st or 2nd mechanisms 1 or 2. A selection means 11 selects the 1st or 2nd reproduction output level control means 9 or 10 in response to the logical command given from the means 20. Thus the means 9 or 10 can always be selected in response to the head at the reproduction side despite only a single reproduction amplifier 8 provided to the 1st and 2nd heads 3 and 4. Furthermore it is possible to secure a prescribed output level in a tape reproduction mode even though both heads 3 and 4 have the difference of reproduction sensitivity. In such a way, a tape recorder which is also capable of dubbing can be obtained with a simple constitution and at low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention has a plurality of mechanism parts, and a signal reproduced by a reproduction head mounted on a first mechanism part is transmitted to a second mechanism part.
The present invention relates to a tape recorder that enables so-called dubbing recording, in which recording is performed using a recording head mounted on the mechanism section of the tape recorder.

BACKGROUND OF THE INVENTION In recent years, tape recorders have been actively developed to have a plurality of mechanical parts, to enable dubbing and recording operations, and to be inexpensive.

An example of the conventional tape recorder mentioned above will be described below with reference to the drawings.

FIG. 2 is a block diagram of main parts of a conventional tape recorder. In FIG. 2, 1 is a first mechanism section that enters a playback operation state during a dubbing operation, and 2 is a first mechanism section 1.
3 is a first reproducing amplifier which inputs the reproduction output signal of the reproducing head 2; 4 is a recording/reproducing head 7, which will be described later, when the recording/reproducing switch 6, which will be described later, is in the reproducing state; 5 is a second mechanism section that enters the recording state during dubbing operation or normal recording operation; 6 is a second mechanism section that enters the recording state during dubbing operation or normal recording operation; An output signal from a recording amplifier 16, which will be described later, and a recording signal superimposed with a bias current from a bias oscillator 17, which will be described later, are supplied to the recording/reproducing head 7, which will be described later. When 5 is in the playback operation state, it switches to the playback side and inputs a playback signal from the recording/playback head 7, which will be described later, to the second playback amplifier 4. 7 is a second mechanism section. 5 operates as a recording head when it is in the recording state, and operates as a playback head when the second mechanism section 5 is in the playback state; 21 and 22 are the first reproducing amplifier 3 and the second mechanism section 5; The first and second reproduction output level adjusting means 8 and 9 are connected to the signal transmission path for transmitting the output of the regenerative amplifier 4 of No. 2;
10 is a mixing amplifier that amplifies the signal mixed by the mixing resistors 8 and 9; 11 is a voltage amplifier that receives the output signal of the mixing amplifier 1o; 12 is an output terminal connected to the output of the voltage amplifier 11; 13 is an input terminal to which a recording source signal is connected; 14 is an input level adjusting means for adjusting the input level from the input terminal 13 to a level suitable for recording; 16 is an input level adjustment means 14 when performing normal recording operation.
A dubbing operation changeover switch 16 is configured to input an output signal from the mixing amplifier 1o to a recording amplifier 16, which will be described later, and input an output signal from the mixing amplifier 1o to a recording amplifier 16, which will be described later, when performing a dubbing operation. A recording amplifier 17 whose input is a signal input through the recording/reproducing head 7 and whose output is connected to the recording side of the recording/reproducing switch 6 supplies a bias current to the recording/reproducing head 7 when the second mechanism section 6 is in the recording operation state. A bias oscillator 18 whose output is connected to the recording side of the recording/reproduction changeover switch 6 so as to control the operation of the first mechanism section 1 and the second mechanism section 6 as well as the operation state of the mechanism sections 1 and 5 A predetermined logical command is issued in response to the first signal cutoff means 19, which will be described later. A control means 19 operates in response to a predetermined logical command from the control means 18 to cut off the output signal from the first reproduction output level adjusting means 21. The signal cutoff means 1 and 2o are second signal cutoff means that operate in response to a predetermined logical command from the control means 18 and cut off the output signal from the second reproduction output level adjustment means 22.

The operation of the tape recorder configured as described above will be explained below.

First, an unrecorded compact cassette (not shown) is attached to the second mechanism section 6, and only the mechanism section 2 is used for recording operation, and a source signal source from a tuner or the like is connected to the input terminal 12. To explain the normal recording operation for recording this, the source signal input to the input terminal 12 is adjusted to a level suitable for recording by the input level adjustment means 14, and then the dubbing operation changeover switch 15
The amplified output signal is input to the recording amplifier 16 via the common terminal 150 from the terminal 15 & of the 15 & is superimposed on the bias current from the bias oscillator 17, and is input from the recording side terminal 6a of the recording/reproduction switch 6 via the common terminal 6C. The recorded data is added to the recording/reproducing ifE head 7 which operates as a recording head, and recorded onto a compact cassette.

Next, a recorded compact cassette (not shown) such as a music tape is attached to the first mechanism section 1, the first mechanism section 1 is brought into a playback state, and an unrecorded compact cassette is inserted into the second mechanism section 6. (not shown) and puts the second mechanism section 5 into the recording operation state. The playback signal played by the playback head placed on the first mechanism section 1 is After being input to the regenerative amplifier 3 and amplified, it is adjusted to a specified level by the first reproducing output level adjusting means 21, and then input to the mixing amplifier 1 via the mixing resistor 8.
o, and the output signal is inputted from the terminal 15b of the dubbing operation selector switch 16 to the recording amplifier 16 via the common terminal 150, and then sent to the second mechanism section 5 in the same manner as in the normal recording operation described above. Dubbing recording is performed on the attached unrecorded compact cassette.

At this time, the output transmission path from the second reproduction output level adjustment means 22 is cut off by the second signal cutoff means 2Q to prevent the influence of noise from the second reproduction amplifier 4.

Next, to explain the playback operation in which a recorded compact cassette (not shown) is attached to the first mechanism section 1 and only the first mechanism section 1 is in the playback operation state, the output transmission line of the mixing amplifier 10 is , until the amplified reproduction signal is output is the same as in the dubbing operation described above, and the output signal from the mixing amplifier 1o is input to the voltage amplifier 11, where the voltage is amplified to a predetermined output level /I/. After that, by being applied to the output terminal 12,
The playback operation of the recorded compact cassette mounted on the first mechanism section 1 will be performed.

At this time as well, the output transmission path from the second reproduction output level adjustment means 22 is blocked by the second signal cutoff means 20, as in the dubbing operation.

Furthermore, we will explain the playback operation in which a recorded compact cassette (not shown) is attached to the second mechanism section, only the second mechanism section 5 is in the playback operation state, and the recording/playback head 7 is operated as the playback head. The reproduction signal reproduced by the recording/reproduction head 7 operating as a reproduction head is inputted to the second reproduction amplifier 4 from the common terminal 6C of the recording/reproduction switch 6 via the reproduction side terminal 6b and is amplified. The output is output to the second reproduction output level adjustment means 2.
2, the output is input to a mixing amplifier 1o through a mixing resistor 9 and amplified, and the output thereof is input to a voltage amplifier 11 and voltage amplified to a predetermined output level. By applying the voltage to the terminal 12, the recorded compact cassette mounted on the second mechanism section 2 is played back.

At this time, the output transmission path from the first reproduction output level adjustment means 21 is cut off by the first signal cutoff means 19 so that there is no influence of noise etc. from the first reproduction amplifier 3.

Problems to be Solved by the Invention However, in the above configuration, the first mechanism section is in the reproducing operation state, and the first regenerative amplifier to which the reproducing signal is input from the reproducing head and the second mechanism section are in the reproducing operation state. A second reproducing amplifier is provided to which a reproduced signal is input when the recording/reproducing head is in an operating state and operates as a reproducing head.

Furthermore, the output of the first or second reproducing amplifier connected to the reproducing head or recording/reproducing head on the side of the mechanism that is not in playback operation is cut off, and the first and second reproducing amplifiers are Since the provision of the second signal cutoff means causes many problems such as the complexity of the circuit and the increase in cost, different logic commands are required depending on whether the first or second mechanism is in the reproducing operation state. When a switch means is provided which can be switched in response to a logical command from a control means that outputs a signal, and a single regenerative amplifier is configured, it is determined which of the first or second regenerative output level adjusting means is to be operated; There is a problem in that a specified reproduction output level must be obtained regardless of whether reproduction is performed using the first or second mechanism section.

In view of the above-mentioned problems, the present invention provides a configuration in which only one regenerative amplifier is provided, and a logical command for switching a switch means for switching a reproducing signal from the first or second head. A tape recorder in which a corresponding first or second reproduction output level adjusting means is selected so that a specified reproduction output level can be obtained no matter which side of the first or second mechanism part is used for reproduction. It provides:

Means for Solving the Problems In order to solve the above problems, the tape recorder of the present invention has a first head mounted on a first mechanism section and a second head mounted on a second mechanism section. a second head, a switch means for switching the reproduced signal from either the first or second head, a regenerative amplifier to which the signal switched by the switch means is input, and an output of the regenerative amplifier. a signal transmission path to transmit; a first reproduction output level adjusting means connected to the signal transmission path and adjusting the reproduction output level when a reproduction signal from the first head is input; said second
a second reproduction output level adjusting means for adjusting the reproduction output level when a reproduction signal from the head is being input; and a second reproduction output level adjusting means for adjusting the reproduction output level when the first mechanism section is in a reproduction operation state; A control means for issuing a command with a different logic depending on the state of playback operation, and a selection for selecting either the first or second playback output level adjustment means in response to the logic command from the control means. It is constructed by providing means.

Operation The present invention has the above-described configuration, so that when a logic command is issued from the control means so that the reproduction signal from the first head is input to the reproduction amplifier, that is, the first mechanism and the system unit are in the reproduction operation state. In some cases, the first reproduction output level adjustment means is selected and a logical command different from the above is issued from the control means so that the reproduction signal from the second head is input to the reproduction amplifier, i.e. When the second mechanism section is in the reproducing operation state, the second reproduction output level adjusting means is selected.

Embodiment Hereinafter, a tape recorder according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of main parts of a tape recorder according to an embodiment of the present invention. In FIG. 1, 1 and 2 are the first and second mechanism parts, 3 is a playback head (first head) placed on the first mechanism part 1, and 4 is a playback head placed on the second mechanism part 2. 5 and 6 are compact cassettes attached to the first mechanism part 1 and the second mechanism part 2, and 7 is a recording/playback head (second head) in which the first mechanism part 1 is in the playback operation state. In response to a predetermined logical command from a control means 2o (described later), a reproduction signal from the reproduction head 2 or the recording/reproducing head 4 via the recording/reproducing switch 12 (described later) is input to the reproduction amplifier 8 (described later). 8 is a reproducing amplifier which inputs the reproduced signal from the reproducing head 3 or the recording/reproducing head 4 selected by the switch means; 9 and 10 are connected to the output transmission line of the reproducing amplifier 8, and 8 is a reproducing amplifier which receives the reproduction signal from the reproducing head 3 or recording/reproducing head 4 selected by the switch means; Means 11
The first and second playback output level adjustment means 11 are selected by the opening/closing operation of the control means 2o, which will be described later. A selection means 12 for selecting either means 9 or 1o is switched to the recording side during dubbing operation or normal recording operation, and outputs an output signal from a recording amplifier 18 (described later) and a bias oscillator 19 (described later). The recording signal superimposed on the bias current is supplied to the recording/playback head 4, and when the second mechanism section 2 is in the playback operation state, it switches to the playback side and outputs the playback signal from the recording/playback head 4. A recording/reproducing switch 13 inputs an output signal of the reproducing amplifier 8 to the reproducing amplifier 8 via 7b of the switch means 7, and an output terminal 1 to be described later.
14 is an output terminal connected to the output terminal of voltage amplifier 13; 15 is an input terminal to which a recording source signal source is connected; 16 is an input terminal. Input level adjustment means 17 adjusts the input level from 15 to a level suitable for recording, and 17 inputs the output signal from the input level adjustment means 1e to a recording amplifier 18 (described later) when performing normal recording operation, and performs dubbing. When performing an operation, a dubbing operation selector switch 18 is switched so that the output signal of the reproduction amplifier 8 is input to a recording amplifier 18 (to be described later). A recording amplifier connected to the recording side of the changeover switch 12, 1
9 is a bias oscillator connected to the recording side of the recording/reproducing switch 12 so as to supply a bias current to the recording/reproducing head 4 when the second mechanism section 2 is in the recording operation state; This is a control means that issues commands with different logic when the first mechanism section 1 is in the reproducing operation state and when the second mechanism section 2 is in the reproducing operation state.

The operation of the tape recorder configured as described above will be explained below.

First, the compact cassette 6 is attached to the second mechanism section 2, and only the mechanism section 2 is used for recording operation, and a source signal source from a tuner or the like is connected to the input terminal 16 to record it. To explain the recording operation, the source signal input to the input terminal 15 is adjusted to a level suitable for recording by the input level adjustment means 16, and then is transferred from the terminal 17 & of the dubbing operation changeover switch 17 to the common terminal 17C for recording. input to the amplifier 18;
The amplified output signal is superimposed on the bias current from the via 7 oscillator 19, and is applied from the recording side terminal 121L of the recording/reproducing switch 12 to the recording/reproducing head 4, which operates as a recording head, via the common terminal 120, and is applied to the compact cassette 6. will be recorded.

Next, a recorded compact cassette 6 such as a music tape is attached to the first mechanism section 1, the first mechanism section 1 is brought into playback mode, and an unrecorded compact cassette 6 is attached to the second mechanism section 2. , to explain the dubbing operation in which the second mechanism section 2 is put into the recording operation state, the reproduction signal reproduced by the reproduction head 3 mounted on the first mechanism section 1 is controlled by a predetermined logical command from the control means 20. The amplified output is input to the regenerative amplifier 8 via the 7a side of the switch means 7, which is closed in response to a predetermined logic command (positive logic) from the control means 20. is input to the first playback output level adjustment means 9 through the 11& side of the selection means 11, and after being adjusted to a specified level, it is input to the recording amplifier 1 from the terminal 17b of the dubbing operation changeover switch 17 through the common terminal 17C.
8 is input.

Then, dubbing recording is performed on the unrecorded compact cassette 6 mounted on the second mechanism section 2 in the same manner as in the normal recording operation described above.

Next, we will explain the playback operation in which the recorded compact cassette 5 is attached to the first mechanism section 1 and only the first mechanism section 1 is in the playback operation state.
The amplified playback signal is output to the output transmission line of , and is adjusted to a specified level by the first playback output level adjustment means 9 via the 111L side of the selection means 11 in the same manner as in the dubbing operation described above. The output signal from the regenerative amplifier 8 is input to the voltage amplifier 13, where the voltage is amplified to a predetermined output level, and then applied to the output terminal 14, whereby the recording mounted on the first mechanism section 1 is The playback operation of the used compact cassette 6 will be performed.

Furthermore, we will explain the playback operation in which the recorded compact cassette 6 is attached to the second mechanism section 2, only the second mechanism section 2 is in the playback operation state, and the recording/playback head 4 is operated as the playback head. The playback signal played back by the recording/playback head 4 operating as The amplified output is input to the regenerative amplifier 8 via 7b of the switch means 7, which is closed, and the amplified output is input to the 11b side of the selection means 11, which is closed in response to a predetermined logic command (negative logic) from the control means 20. is input to the second playback output level adjustment means 10 via
Thereafter, the reproduction operation of the recorded compact cassette 6 mounted on the second mechanism section 2 is performed in the same manner as when only the first mechanism section 1 is in the reproduction operation state described above.

As described above, according to this embodiment, the first head placed on the first mechanism part, the second head placed on the second mechanism part, and the first or second head placed on the first mechanism part, a switch means for switching the reproduced signal from which head; a regenerative amplifier into which the signal switched by the switch means is input; a signal transmission path for transmitting the output of the regenerative amplifier; and a signal transmission path for the signal transmission path. a first playback output level adjusting means that is connected and adjusts a playback output level when a playback signal from the first head is input; The second one adjusts the playback output level when a signal is input.
a reproduction output level adjusting means; a control means for issuing commands with different logic when the first mechanism section is in the reproduction operation state and when the second mechanism section is in the reproduction operation state; and the control means. selecting means for selecting either the first or second reproduction output level adjusting means in response to the logical command from the means;
By configuring the switch means for switching the reproduction signal from the first head and the selection means for selecting either the first or second reproduction output level adjusting means to be controlled by the same logical command, When the mechanism section is in the reproduction operation state, the first reproduction output level adjustment means is selected, and when the second mechanism section is in the reproduction operation state, the second reproduction output level adjustment means is selected. You can do it like this.

Effects of the invention The first head placed on the first mechanism part and the second
a second head placed on the mechanism section of the second head;
or a second switch for switching which head the reproduced signal comes from; a regenerative amplifier into which the signal switched by the switch is input; a signal transmission line for transmitting the output of the regenerative amplifier; a first reproduction output level adjusting means connected to the signal transmission path and adjusting the reproduction output level when a reproduction signal from the first head is input; a second reproduction output level adjusting means for adjusting the reproduction output level when a reproduction signal from the head is being input; and a second reproduction output level adjusting means for adjusting the reproduction output level when the first mechanism section is in the reproduction operation state; a control means for issuing a different logic command depending on the operating state; and a selection means for selecting either the first or second reproduction output level adjusting means in response to the logic command from the control means. By providing this, even if one regenerative amplifier is provided for the first and second heads, the reproduction output level adjusting means corresponding to the head being reproduced can always be selected, and the first
or the first or second mechanism placed on the second mechanism part.
Even if there is a difference in the playback sensitivity of the two heads, it is possible to obtain the specified output level during tape playback, and it is also possible to obtain the output level of the playback amplifier on the side that is not being used, such as when two playback amplifiers are installed. It is possible to provide a tape recorder capable of simple and low-cost dubbing operation that does not require a signal cutoff means for cutting off a signal.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of main parts of a tape recorder according to an embodiment of the present invention, and FIG. 2 is a block diagram of main parts of a conventional tape recorder. DESCRIPTION OF SYMBOLS 1...First mechanism section, 2...Second mechanism, 3...Playback head, 4...
...Recording/playback head, 6 and 6... Compact cassette, 7... Switch means, 8...
. . . regenerative amplifier, 9 . . . first reproduction output level adjustment means, 10 . . . second reproduction output level adjustment means, 11 . . . selection means, 12.・・・・・・
Recording/playback switch, 13... Voltage amplifier, 1
4...Output terminal, 16...Input terminal,
16... Input level adjustment means, 17...
...Dubbing operation selector switch, 18...Recording amplifier, 19...No (IAS oscillator, 2o.
...control means.

Claims (2)

[Claims] (1) The first head placed on the first mechanism section, the second head placed on the second mechanism section, and whether the reproduced signal is from the first or second head. a regenerative amplifier into which the signal switched by the switching means is input, a signal transmission line for transmitting the output of the regenerative amplifier, and a signal transmission line connected to the signal transmission line from the first head to the regenerative amplifier; a first reproduction output level adjusting means for adjusting a reproduction output level when a reproduction signal from the second head is input; a second reproduction output level adjusting means for adjusting a reproduction output level; and instructions having different logic when the first mechanism section is in the reproduction operation state and when the second mechanism section is in the reproduction operation state. and a selection means for selecting either the first or second reproduction output level adjusting means in response to the logical command from the control means. (2) The switch means for switching the playback signal from the first or second head and the selection means for selecting either the first or second playback output level adjustment means are controlled by commands of the same logic. A tape recorder according to claim 1, comprising: