JPS59132475A - Tape recorder - Google Patents

Abstract

PURPOSE:To improve the operability and portability by changing an input of a main amplifier of a tape recorder to an input of a preamplifier or an output of an external device by a changeover switch to make the connection of a microphone, a headphone and a tuner or the like possible. CONSTITUTION:A tuner section 3 is provided with a connector section 8 of projected shape at one end face. Further, a projection 17 is provided at the circumference and connectors 7, 8 are connected by inserting the projection 17 to a guide groove to connect a switch box 6 and the tuner section 3. In connecting the tuner 3, when switches 32-1-32-5 are switched to the position (c), the tuner output at terminals 8-1, 8-2 is reproduced and recorded through terminals 7-1, 7-2, switches 32-3, 32-4, terminals 5-6, 5-7, terminals 4-6, 4-7 and main amplifiers 24, 24'. On the other hand, an electric power supply 28 is applied selectively to microphone amplifiers 31, 31' or a tuner circuit 41 through terminals 4-8, 4-9, terminals 5-8, 5-9 and a switch 32-5.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a tape recorder mainly used for playback and listening using headphones, and for recording with a microphone attached to or connected to the headphones. The present invention relates to a tape recorder capable of radio reception, radio recording, etc. by connecting an external device such as a radio tuner to the cord.

Conventional Structures and Problems Conventionally, when a tape recorder has a built-in radio, the volume and weight of the radio section is added to the tape recorder, and even when the radio is not needed, the radio section must be carried at the same time. Also, when a built-in microphone is installed, it is easily affected by mechanical vibrations inside the device, so if an external microphone is used to improve this problem, a microphone cord is also required, and the external microphone cannot be held in the hand or worn while wearing clothes. It took a lot of effort to add 9 points to each item.

OBJECTS OF THE INVENTION The present invention solves the above problems and aims to provide a tape recorder with good operability and portability in which a microphone, headphone, radio tuner, etc. can be connected with a simple structure.

Structure of the Invention The present invention provides a headphone section with terminals corresponding to each of the nine terminals of a tape recorder, a changeover switch, a signal input terminal, and a power output terminal, and is connected to the tape recorder so that the output of the main amplifier of the tape recorder can be connected to the headphone section. If necessary, the signal input terminal of the headphone section,
Connect the signal output terminal and power input terminal of the external device section to the power output terminal, and input the output of the external device section to the tape recorder section via the headphone section by changing the changeover switch. It is designed to be listened to.

DESCRIPTION OF EMBODIMENTS FIG. 1 is a perspective view showing a tape recorder section and a headphone section, and FIG. 2 is a perspective view showing a case where a tuner section is further connected to a switch box of the headphone section. Reference numeral 1 designates a tape recorder section, 2 a headphone section, 3 a tuner section configured to be detachably attached to the switch box 6, 4 a connector for the tape recorder section, and 5 a connector for the headphone section. 9 is a head hand, 10.1 o'td headphone unit 11.11' is a headphone unit 10, 10'
Microphones 12, 12' mounted on the outside of the headphones unit 10, 10' ear pads 1
3 is an input/output code for a hesodophone and a microphone.

FIG. 3 shows each part of a switch box 6 in which a coupling connector for the tuner section 3 is provided integrally. FIG. 3(a) shows the back side of the switch box 6, and a guide 14 is provided around the connector 7.
is the A-A' cross section of (A).

As shown in FIG. 3(B), it has a groove portion 15.

FIG. 4(a) shows the tuner section 3, in which a protruding connector section 8 is provided on one end surface. Furthermore, a convex portion 17 is provided around the connector portion 8 as shown in FIG.
The switch box 6 and the tuner section 3 are connected by fitting the connectors 7 and 8 into the grooves 15 of the switch box 6 and the tuner section 3. The above description is just one example, and the mechanical or electrical connection structure may be of any other known type.

FIG. 6 is a circuit diagram of an embodiment of the present invention, in which the tape recorder section 1 includes recording/reproducing heads 21, 21C preamplifiers 22, 22', variable resistors 23, 23', main amplifiers 24.
24', recording output terminal 25.25', playback output terminal 26
．． 26', recording/playback selector switch 27-1, 27-
2. Power supply 28. Terminals 4-1 to 4-9 are provided. On the other hand, the internal headphone unit 10 of the headphone section 2.
10', microphone 11.11', microphone amplifier 31.31'.

Switches 32-1 to 32-5 that can be switched in conjunction with three positions a, b, and c. There are terminals 5-1 to 5-9 and terminals 7-1 to 7-4 connected to the tuner section 3. Further, the tuner section 3 has terminals 8-1 to 8-4 connected to the tuner circuit 41 and the headphone section 2.

First, the tape playback operation with the above configuration will be explained. At this time, swing f27-1.27-2 and switch 32
Set -1 to 32-5 to position b.

The playback output of the recording and playback heads 21 and 21' is controlled by the switch 27.
-1.27-2. Preamplifier 22.22', variable resistor 23.23', terminal 4-4. ．． 4-5 → terminal 5-4.5
-5. Switch 32-1.32-2→Switch 32-3
, 32 → 4. Terminal 5-6.5-7 → Terminal 4-6.4-7
．． The main amplifier 24.24', output terminal 26.26', terminal 4-1.4-2→terminal 5-1.5-2 are operated to operate the headphone unit 10°10' to hear the core.

When recording using microphones 11 and 11', switch 32-1 to 32-5 are set to a position, and switch 27-1 is set to position a.
．． 27-2 to position a. Therefore microphone 1
The output of 1.11' is a microphone amplifier 31.31',
Switch 32-3.32-4° terminal 5-6.5-7→terminal 4-6.4-7. The signal is recorded by the recording/playback head 21.21' via the main amplifier 24.24', the recording output terminal 26.26', and the switch 27-1.27-2.

When tuner 3 is connected, switches 32-1 to 32-
5 to the C position, the tuner output of terminals 8-1.8-2 becomes the same as that of terminals 7-1.7-2. Switches 32-3, 32-4
, the playback listening or recording is performed via the terminal 6-6.6-7 → terminal 4-6.4-7 and the main amplifier 24.24'. Meanwhile, the power supply 28 connects the terminal 4-8.4-9. via terminal 5-
It is selectively applied to the microphone amplifier 31, 31' or the tuner circuit 41 via the 8.5-9° switch 32-5. Note that if one or both of the current consumptions is ignored, the number of switching contacts can be saved.

FIG. 6 is a circuit diagram of another embodiment, in which the microphone amplifiers 31' and 31' in the embodiment of FIG. 6 are not used and FET 3 is used.
2, 33' output to capacitor 34, 34' terminal 25-
10, 6-11 → 4-10, 4-11° switch 2
When the switch 27 is in the a state, that is, in the recording state, the output of the microphone is applied to the preamplifier 22, 22' through the terminals 27-3 and 27-4, and from then on, it is possible to record as shown in FIG. 33°33' is the load resistance. This embodiment has the advantage that the number of contacts of the switch 32 is small and no microphone amplifier is required, but the number of terminals for the tape recorder and headphones increases. Although the example of a recorder has been described, a reproduction-only tape recorder can also be realized by the embodiment shown in FIG. At this time,
If the switch 32 is set to the a position, the microphones 11 and 1
You can also amplify the output of 1' and listen to it with headphones.

In addition, in the case of a playback-only tape recorder, the microphone 11, 11' and the microphone amplifier 31, 31' can of course be omitted, and the switch 32 can also be of a two-way type. Although it is provided integrally with the switch section 6, it may be provided on other parts of the headphone cord or on the headphone structure. In addition to the shape shown in the figure, the hesophone may be a so-called inner-ear type hesophone, which has a small diameter and is inserted into the pinna of the ear.

The mounting location of the microphone is not limited to the location shown in the figure, but may be installed at any arbitrary location such as above, at the top, or in the middle of the headband. Also, the microbon is not fixed to the headphones,
It can be attached and detached.

Further, in the above description, the tuner unit was described as the third device to be added, but this could also be an electronic musical instrument or other signal source generator. In addition, microbons and external connection devices,
If a power supply is not required or the power supply is self-contained, the switch contact or terminal for the power supply may be omitted. Further, the variable resistor is not limited to the illustrated position, but may be provided, for example, on the input side of the main amplifier.

Effects of the Invention The present invention connects a headbond section to a tape recorder section, and connects other external equipment such as a radio tuner to the headphone section, and allows the headbond unit to control how the tape recorder head plays or the output of the external device. You can listen by switching between the two, or by removing the external equipment, you can use it as a regular tape recorder, making it possible to create an excellent tape recorder that is highly portable and easily multifunctional.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a tape recorder showing an embodiment of the present invention, FIG. 2 is a perspective view showing a state in which external equipment is connected,
Figure 3 (A) is a plan view of the switch box, and Figure 3 (B) is a plan view of the switch box.
4(a) is a plan view of the external equipment, FIG. FIG. 6 is a circuit diagram of another embodiment. 1...Tape recorder section, 2...Headphone section, 3...Tuner section, 6...
Switch box, 32-1 to 32-5...Switch. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure 4

Claims (1)

[Claims] a tape recorder section having a preamplifier output terminal, a main amplifier input terminal, a main amplifier output terminal, and a power supply terminal;
A headphone unit driven by terminals corresponding to each terminal of the tape recorder section and the output of the main amplifier, a headphone section having a changeover switch, a signal input terminal, and a power output terminal, and an external device having a signal output terminal and a power input terminal. a device section, connecting each terminal of the tape recorder section to a corresponding terminal of the headphone section, and connecting a signal output terminal and a power input terminal of the external device section to the signal input terminal and power output terminal of the headphone section; A cheap recorder characterized in that the changeover switch is configured to switch the input of the main amplifier of the tape recorder to either the input of a preamplifier or the output of an external device.