JPS5939298Y2 - tape recorder - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tape recorder, and more particularly to a tape recorder that can be used for general purpose use and language practice use by changing a changeover switch.

A tape recorder having a language practice function is configured so that the volume of the teacher's voice and the volume of the student's voice can be adjusted separately.

A variable resistor is generally used as a means for adjusting the volume, and is configured so that when the volume is minimized with the variable resistor, the signal level becomes zero.

Therefore, if you use the IT with the volume adjustment knob set to the minimum position, you will not be able to hear the teacher's voice at all.

The present invention has been developed in view of these points, and will be described in detail below with reference to the drawings.

The illustrated circuit is an embodiment of the present invention, and in the figure, 1 is a first magnetic head corresponding to the first track on which the teacher's voice is recorded during language practice, and 2 is a first magnetic head on which the student's voice is recorded. A second magnetic head 3 corresponding to the second trunk is a first magnetic head 3 for amplifying the signal reproduced by the first magnetic head 1.
An amplifier circuit 4 is a second amplifier circuit for amplifying the signal reproduced by the second magnetic head 2.

5 and 6 are switches for switching between general use and language practice use, and the illustrated state is the general use state.

A fixed terminal 5a on the general-purpose side of the switch 5 is grounded, one fixed terminal 5b is grounded via a resistor γ, and a common terminal 5c
is connected to the output terminal of the first amplifier circuit 3 via a first variable resistor 8.

The slider 8a of the first variable resistor 8 in the housing is connected to the input terminal of the main amplifier circuit 100 via a resistor 9.

A fixed terminal 6a on the general-purpose side of the switch 6 is open, and one fixed terminal 6b is connected to the main amplifier circuit 100 via a resistor 11.
The common terminal 6c is connected to the input terminal, and the common terminal 6c is connected to the slider 12a of the second variable resistor 12 that adjusts the level of the signal output from the second amplifier circuit 4.

Reference numeral 13 denotes a jack connected to the output terminal of the main amplification circuit 10, to which headphones, external speakers, etc. are connected as a load of the main amplification circuit 10.

Reference numeral 14 denotes a base unit connected so that the teacher's live voice etc. can be sent to the student's tape recorder, and the base unit 14 is provided separately from the main body of the tape recorder, and its output signal is amplified by the first amplification. The signal is configured to be input to the output side of the circuit 3.

The present invention is constructed as described above, and its operation will be explained next.

The illustrated state is a general use state, and the second magnetic head 2
And the second amplifier circuit 4 becomes inoperative.

In this general use state, only the first magnetic head 1 is in operation, and the signal reproduced by the first magnetic head 1 is applied to the first amplifier circuit 3 and amplified by the amplifier circuit 3.

The signal amplified by the amplifier circuit 3 has its level adjusted by the first variable resistor 8, is applied to the main amplifier circuit 10, and is output to the jack 13.

At this time, the ground side of the first variable resistor 8 is grounded by the switch 5, so by varying the first variable resistor 8, the signal level can be adjusted from zero to maximum.

As described above, the playback operation is performed during general use, but next, the operation during language practice use will be explained.

In the language practice use state, switches 5 and 6 are switched to the opposite side from the state shown in the figure, and the teacher's voice recorded on the first track is reproduced by the first magnetic head 1 and then amplified by the first amplification. It is input to circuit 3.

The signal input to the first amplifier circuit 3 is amplified by the amplifier circuit 3, and then its level is adjusted by the first variable resistor 8 and applied to the main amplifier circuit 10.

The student's voice recorded on the second track is reproduced by the second magnetic head 2, inputted to the second amplification circuit 4, and amplified by the second amplification circuit 4.

The signal amplified by the second amplifier circuit 4 is applied to the main amplifier circuit 10 through the switch 6 after its level is adjusted by the salt 2 variable resistor 12.

Therefore, the teacher's voice and the student's voice reproduced by the first magnetic head 1 and the second magnetic head 2 are both amplified by the main amplifier circuit 10 and then output to the jack 13, but at this time, the respective volumes are 1 variable resistor 8 and second variable resistor 1
2.

In this language practice usage state, there is a resistance γ between the ground terminal of the first variable resistor 8 that adjusts the volume of the teacher's voice and the ground.
is connected, so that even if the first variable resistor 8 is adjusted to the minimum level, the level of the teacher's voice input to the main amplifier circuit 10 will not become zero, but will be maintained at a predetermined level or higher.

Therefore, the teacher's voice reproduced by the first magnetic head 1 or the signal output from the base unit 14 is necessarily applied to the main amplifier circuit 10, amplified, and output to the jack 13.

Although not explained in this embodiment, during the recording operation during language practice use, the second magnetic head 2 corresponding to the second track on which the student's voice is recorded operates as a recording head by switching the recording/playback switch. The first magnetic head 1 corresponding to the first track on which the teacher's voice is recorded operates as a playback head.

During a recording operation in a general use state, the first magnetic head 1 operates as a recording head by switching the recording/reproduction changeover switch.

As explained above, the present invention provides a variable resistor that adjusts the signal level of the teacher's voice when the tape recorder is used for general purpose use and language practice use by switching the selector switch. A resistor is inserted and connected between the ground side terminal of the
By doing this, the variable resistor is varied to minimize the volume, and the mosol level does not go to zero, but is maintained above a predetermined level.

Therefore, even if you operate the variable resistor that adjusts the signal level of the teacher's voice and accidentally set the volume to the minimum level during language practice, you will not be unable to hear the teacher's voice and will be able to follow the teacher's instructions. The present invention has the advantage of being able to prevent slippage.

Normally, when using language practice, the level of the signal can be reduced to zero by operating a variable resistor that adjusts the signal level of the student's voice, so that the teacher's instructions are not interfered with by the student's voice. The practicality of this invention is very impressive, as it allows you to listen to music reliably without any problems.

[Brief explanation of the drawing]

The illustrated circuit is one embodiment of the present invention. Explanation of main drawing numbers, 1...First magnetic head, 2.
...Second magnetic head, 3...First amplifier circuit, 4...Second amplifier circuit, 8...First
Variable resistor, second variable resistor. 12...

Claims (1)

[Scope of utility model registration request] In a tape recorder that is used by switching between general purpose use and language practice use by switching a changeover switch, a first magnetic head corresponding to the first trunk where the teacher's voice is recorded, and a second magnetic head where the student's voice is recorded. a second magnetic head corresponding to the track; a first amplifier circuit to which the signal reproduced by the first magnetic head is input; and a first amplifier circuit which amplifies the signal; and a signal reproduced by the second magnetic head is input. a second amplification circuit that amplifies the signal together with the first amplification circuit;
a first variable resistor to which the output signal of the amplifier circuit is applied and adjusts the level of the signal; and a second variable resistor to which the output signal of the second amplifier circuit is applied and adjusts the level of the signal.
By switching the variable resistor and the changeover switch, a signal whose level has been adjusted by the first variable resistor is input during general use, and a signal whose level has been adjusted by the first variable resistor and the second variable resistor when used for language practice. a main amplifier circuit into which a signal whose level is adjusted by a resistor is mixed and input; and a resistor which is inserted and connected between the ground side terminal of the first variable resistor and the ground by switching the changeover switch when using the language practice. The signal level of the student's voice can be adjusted to zero by adjusting the second variable resistor when the language practice is in use, and the signal level of the teacher's voice can be adjusted to zero by adjusting the first variable resistor. A tape recorder characterized in that it is impossible to adjust to zero.