JP3365558B2 - Recording and playback device - Google Patents

Description

[0001] The present invention will be described in the following order. Industrial Application Field Means for Solving the Problems to be Solved by the Conventional Technical Invention (FIG. 1) Function (FIG. 1) Example (FIG. 1) (1) Configuration of Example (2) Example BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus, and can be applied to, for example, a portable tape recorder. Conventionally, in a portable tape recorder, a built-in speaker is omitted and an earphone jack for monitoring is shared with a microphone jack.
The overall shape is reduced in size. That is, in this type of tape recorder, when a microphone or an earphone is plugged into an earphone jack, a recording / reproducing circuit is connected to the microphone or the earphone. Therefore, in the tape recorder, by pulling out the plug inserted into the earphone jack and setting the recording mode, the recording can be performed by the built-in microphone. Further, by inserting a plug of a microphone into an earphone jack, recording can be performed with a desired microphone. On the other hand, at the time of reproduction, in this type of tape recorder, the plug of the earphone is inserted into the earphone jack, so that the recorded contents can be confirmed through the earphone. In this type of tape recorder, when a plug is inserted into an earphone jack, a recording / reproducing circuit is connected to the earphone jack. When recording using, it was necessary to pull out the plug inserted into the earphone jack. For this reason, in the tape recorder, when recording is performed using the built-in microphone, it is necessary to pull out the plug of the earphone from the earphone jack in order to check the recorded content on the way. In addition, when recording using an external microphone, after the external microphone is unplugged and the earphone plug is not inserted, the recorded content cannot be confirmed, and the recorded content is immediately saved. There was a problem of inconvenience when confirming. The present invention has been made in view of the above points, and it is an object of the present invention to propose a recording / reproducing apparatus capable of improving usability as compared with the related art. According to the present invention, there is provided a microphone 2 incorporated in a recording / reproducing apparatus 1, a first terminal 12b, and a second terminal 12a. The first terminal 12b by the inserted plug.
And a second contact 12b connected to the first terminal 12a to which an output signal from the microphone 2 is supplied. A selection circuit 10 for selecting and outputting a signal from the first contact 10a and a signal from the second contact 10b, a recording amplification circuit 20, and the recording amplification circuit 20
A first switch circuit 14 that is provided between the first switch circuit 14 and the selection circuit 10 and that is turned on during recording.
2 is provided between the reproduction amplifier circuit 22 and the first terminal 12b, and is turned on / off complementarily in conjunction with the first switch circuit 14; And a second switch circuit 16 for supplying an output signal to the first terminal 12b. When recording, when the selection circuit 10 is selected to output a signal from the first contact 10a, a signal from the microphone 2 is output. An output signal is supplied to the recording amplifier circuit 20. When the selection circuit 10 is selected to output a signal from the second contact 10b in a state where the plug is inserted into the jack 12, the signal from the first terminal 12b is output. An output signal is supplied to the recording amplifier circuit 20, and when the first terminal 12b and the second terminal 12a are in the ON state, the selection circuit 10 is connected to the second contact 10b.
When the output from the microphone 2 is selected, the output signal from the microphone 2 is supplied to the recording amplifier circuit 20. When the plug is inserted, the first terminal 12b and the second terminal 12a are turned off.
If the output signal of the microphone 2 is supplied to the second contact 10b of the selection circuit 10 via the interface and the output signal is directly supplied to the first contact 10a of the selection circuit 10, the plug is inserted into the jack 12. Recording can be performed by using the microphone 2 as it is, and plugging and unplugging can be omitted to improve usability. An embodiment of the present invention will be described below in detail with reference to the drawings. (1) Configuration of the embodiment In FIG. 1, reference numeral 1 denotes a tape recorder as a whole,
Recording can be performed using the built-in microphone 2. That is, in the tape recorder 1, the microphone 2 has one end grounded and the resistors 4 and 6 connected thereto.
, A driving power supply VCC is supplied to the other end. Further, the microphone 2 has a terminal on the power supply side connected to a contact 10 of a selection circuit 10 via a capacitor 8.
a and grounded via a capacitor 9. The selection circuit 10 connects the remaining contact 10b to the terminal 12b of the earphone jack 12, whereby the selection circuit 10 selects the built-in microphone 2 or the external microphone by selecting the contact 10a or 10b. , And outputs the selected output to the switch circuit 14. The switch circuit 14 is turned on / off in a complementary manner in conjunction with the switch circuit 16, so that at the time of recording,
While the selection signal of the built-in microphone 2 or the external microphone is output to the recording amplification circuit 20, the output signal of the reproduction amplification circuit 22 is output to the earphone jack 12 at the time of reproduction. That is, the switch circuit 14 is switched to the ON state during recording, whereby the contact 1 of the selection circuit 10 is turned on.
When 0a is selected, the output signal of the built-in microphone 2 is supplied to the capacitor 8, the selection circuit 10 and the switch circuit 14.
And outputs the output signal of the built-in microphone 2 to a magnetic tape (not shown) sequentially. Thus, even when the plug is inserted into the earphone jack 12, recording can be performed using the built-in microphone 2. Further, the switch circuit 14 includes the capacitor 1
The terminal of the recording amplifier circuit 20 is connected via a resistor 17 to the connection point between the resistors 4 and 6 which are grounded at 5.
Is selected, the power supply VCC is supplied to the earphone jack 12 through the resistor 17, the switch circuit 14, the selection circuit 10, and the terminal 12 b sequentially. Here, the terminal 12a of the earphone jack 12
And 12b are switched off when a plug is inserted into the earphone jack 12. Thus, in the tape recorder 1, the output signal of the microphone 2 is directly output to the selection circuit 10, and
The output signal of the external microphone is output to the selection circuit 10 via the terminal 12b of the earphone jack 12. Therefore, in the tape recorder 1, after the plug of the external microphone is inserted into the earphone jack 12 and the contact 10b of the selection circuit 10 is selected, the output signal of the built-in microphone 2 to the recording amplification circuit 20 during recording is selected. Of the external microphone is supplied to the terminal 12b-selection circuit 10-
The data is supplied to the recording amplifier circuit 20 via the switch circuit 14 in sequence, so that recording can be performed using an external microphone. On the other hand, in the tape recorder 1, the contact 10a of the selection circuit 10 is selected while the plug of the microphone or the earphone is inserted into the earphone jack 12, so that the contact 10b and the recording amplifier circuit 20 are selected. The connection between the internal microphone 2 and the output signal of the built-in microphone 2 is interrupted by the capacitor 8, the selection circuit 10, and the switch circuit 1.
4 to the recording amplifier circuit 20. As a result, in the tape recorder 1,
Even when the external microphone or the plug of the earphone is still inserted in the earphone jack 12, the recording can be performed using the built-in microphone 2 by switching to the contact 10a in the selection circuit 10. Therefore, the tape recorder 1 can use the built-in microphone 2 for recording without removing the plug from the earphone jack 12, thereby improving the usability of the tape recorder 1. On the other hand, the switch circuit 14 switches to the off state during reproduction, thereby stopping the output of the selection signal. The switch circuit 16 is turned on during reproduction, and switches the output signal of the reproduction amplifier circuit 22 to the selection circuit 1.
0 is output to the contact 10b. Thereby, in the tape recorder 1, during playback, when the earphone plug is inserted into the earphone jack 12, the output signal of the playback amplifier circuit 22 is sequentially output to the earphone via the switch circuit 16-terminal 12b, Thus, the recorded contents can be confirmed. During playback, when the earphone plug is not inserted into the earphone jack 12, the terminal 12a
In the tape recorder 1, the output signal of the reproduction amplifier circuit 22 is grounded via the switch circuit 16-terminal 12b-terminal 12a-capacitor 9 in that order. Thus, even when the plug of the earphone is inserted into the earphone jack 12, by switching the contacts of the selection circuit 10, recording can be performed using the built-in microphone 2, and the recorded content can be easily checked and the plug can be unplugged and unplugged. Can be omitted to improve the usability as compared with the related art. (2) Operation of the embodiment In the above configuration, at the time of recording, in the tape recorder 1, the switch circuit 14 is switched on and the switch circuit 16 is switched off. Here, in the tape recorder 1, when the plug is not inserted into the earphone jack 12,
When the contact 10a of the selection circuit 10 is selected, the output signal of the built-in microphone 2 is transferred to the recording amplifier 20 via the capacitor 8, the selection circuit 10 (contact 10a) and the switch circuit 14.
Supplied to When the contact 10b of the selection circuit 10 is selected in this state, the output signal of the built-in microphone 2 is supplied to the recording amplifier circuit 20 via the capacitor 8, the earphone jack 12, the selection circuit 10, and the switch circuit 14.
Thus, in the tape recorder 1, when the plug is not inserted into the earphone jack 12, recording can be performed using the built-in microphone 2. When the contact 10b of the selection circuit 10 is selected with the plug of the microphone inserted into the earphone jack 12, the tape recorder 1 switches the contacts 12a and 12b of the earphone jack 12 to the off state. Built-in microphone 2 and recording amplifier circuit 2
The connection between 0 is cut off by the contact 12a and the contact 10a of the selection circuit 10. Instead, in the tape recorder 1, the output signal of the external microphone input through the contact 12b of the earphone jack 12 is supplied to the selection circuit 1
It is output to the recording amplifier circuit 20 via the 0-switch circuit 14. When the contact 10a of the selection circuit 10 is selected in this state, the output signal of the microphone 2 is recorded and amplified via the capacitor 8, the selection circuit 10 and the switch circuit 14 instead of the output signal of the external microphone input from the earphone jack. It is supplied to the circuit 20. Thereby, the selection circuit 1
With a simple operation of switching 0, recording can be performed by switching microphones. On the other hand, at the time of reproduction, in the tape recorder 1, the switch circuit 14 switches to the off state,
The switch circuit 16 switches to the ON state. If the plug is not inserted into the earphone jack 12 in this state, in the tape recorder 1, the output signal of the reproduction amplifier circuit 22 is grounded via the switch circuit 16-jack 12-capacitor 9. On the other hand, when the plug is inserted into the earphone jack 12, in the tape recorder 1, the output signal of the reproduction amplifier circuit 22 is output from the switch circuit 16-.
The recording is supplied to the plug via the jack 12, so that the recorded contents can be confirmed by a simple operation. (3) Effects of the Embodiment According to the above-described configuration, the output signal of the microphone 2 is directly output to the selection circuit 10 and the earphone jack 12
By outputting the signal selected by the selection circuit 10 to the recording amplifier circuit 20 through the terminals 12a and 12b, and by supplying the signal selected by the selection circuit 10 to the recording amplifier circuit 20, even if the plug is inserted into the earphone jack 12, the built-in microphone 2 can be selected for recording, and the usability can be improved by omitting complicated plugging and unplugging. (4) Other Embodiments In the above-described embodiments, the case where the earphone jack and the microphone jack are used has been described. However, the present invention is not limited to this, and in addition to this, an input terminal of a remote control. The present invention can be widely applied to cases where various input terminals and earphone jacks are also used, for example, when they are also used. Further, in the above-described embodiment, the case where the present invention is applied to a portable tape recorder has been described. Can be applied. As described above, according to the present invention, the output signal of the built-in microphone is directly output to the selection circuit, and the output signal is supplied via the first terminal and the second terminal of the earphone jack. By outputting to the selection circuit and recording the selection output of the selection circuit, even when the earphone jack is plugged in, the built-in microphone can be selected and recorded. Therefore, recording and reproduction can be performed without complicated plugging and unplugging, so that a recording and reproducing apparatus with improved usability as compared with the related art can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a tape recorder according to one embodiment of the present invention. [Description of Signs] 1 ... Tape Recorder, 2 ... Microphone, 10 ...
Selection circuit, 12 ... earphone jack, 14, 16 ...
Switch circuit, 20: recording amplifier circuit, 22: reproduction amplifier circuit.

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) G11B 5/027 G11B 31/00-31/02

Claims (1)

(57) [Claims] (1)Microphone built into recording / playback device
When, An inserted plug having a first terminal and a second terminal
As a result, the first terminal and the second terminal are turned off.
A jack that switches to A first connection to which an output signal from the microphone is supplied
A point and a second contact connected to the first terminal,
A signal from the first contact and a signal from the second contact
And a selection circuit for selecting and outputting A recording amplifier circuit; Provided between the recording amplifier circuit and the selection circuit;
A first switch circuit that switches to an on state during recording, A reproduction amplifier circuit, Provided between the reproduction amplifier circuit and the first terminal;
On / off complementarily in conjunction with the first switch circuit
Switch to the ON state during playback, and
A second switch for supplying the output signals to the first terminal.
With a circuit At the time of the recording, the selection circuit transmits a signal from the first contact.
Signal is selected when the
The output signal from the microphone is supplied to the recording amplifier circuit,
Select the above with the above plug inserted in the jack
Select circuit to output signal from the second contact
Output signal from the first terminal when
Supply to the recording / amplifying circuit, and the first terminal
The selection circuit when the second terminal is in an ON state;
Is selected to output a signal from the second contact.
The output signal from the microphone
Supply to recording amplifier circuit Recording / reproducing apparatus characterized by the following:
Place.