JPH0120570B2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Technical Field of the Invention The present invention relates to a headphone type wireless transmitting/receiving device having an FM/AM radio receiving function. , and a built-in transmitter/receiver circuit for wireless communication,
The present invention relates to a small and lightweight headphone type transmitting/receiving device in which an antenna for radio reception and wireless transmission/reception is provided in a hairband section that connects both ear pad sections.

(2) Prior art and its problems Compact and lightweight portable radio devices have a wide range of uses, both for business and amateur use, and include hand-talk type transceivers such as transceivers.
When using this type of small wireless transmitter/receiver, a relatively small one doubles as a speaker and a microphone, so it is held against the mouth when transmitting, and pressed against the ear when receiving. There is also a large transceiver with an independent speaker and microphone, so that you can always place the receiving speaker in your ear and the transmitting microphone in your mouth while talking.

However, the former type of transmitter/receiver requires operating a switch or the like to switch between transmitting and receiving operations when transmitting and receiving, making it extremely troublesome to handle, while the latter's device is bulky and inconvenient to carry. Furthermore, in both devices, it may be difficult to hear the received sound in a noisy place because the speaker is pressed against only one ear. However, conventional transceivers require an antenna to be erected during communication, which can make communication difficult or impossible in places where there are obstacles such as crowds. Furthermore,
Many of the conventional devices had only a transmitting/receiving function and were used for special purposes, but there was no one that could be adapted to the multipurpose uses that have been required in recent years, so a multipurpose transmitting/receiving device that anyone can easily use is needed. The appearance of this was strongly desired.

(3) Purpose of the Invention The present invention has been made in view of the above-mentioned circumstances, and is capable of listening to received audio with both ears, enabling high-quality sending and receiving calls even in noisy places, and is capable of transmitting and receiving calls with FM/ It has an AM radio broadcast reception function and can be used for multiple purposes.In addition, it has a built-in extendable antenna for both wireless communication and broadcast reception, making it a compact and lightweight device that does not suffer from space constraints when used. The object of the present invention is to provide a headphone type transmitting/receiving device.

(4) Features of the Invention In order to achieve the above object, the transmitting/receiving device having a radio receiving function of the present invention incorporates a radio receiving circuit and a wireless communication transmitting/receiving circuit in each ear pad part,
It is characterized in that an arm member equipped with a microphone at the tip is provided on one of the ear pads so that its length can be adjusted, and an antenna that is extendable and retractable is provided along a hair band that connects both ear pads. Embodiments of the present invention will be described in detail below based on the drawings.

(5) Embodiments of the invention FIG. 1 is a block circuit diagram of an embodiment of the transmitting and receiving device of the present invention, FIG. 2A is a partially cutaway perspective view of the transmitting and receiving device, and FIG. A of A
- A sectional view taken along line A, and Figure 3 is an overall circuit diagram.

Reference numeral 20 in the figure is one ear part that makes up the headphone, and this ear part 20 has an FM/
It has a built-in AM radio receiving circuit. This radio receiving circuit includes an FM receiving section consisting of an FM tuning circuit 1, an FM high frequency amplification circuit (RF AMP) 2, and a local oscillation circuit 3, an AM tuning circuit 4, a local oscillation circuit 5, and an AM high frequency amplification circuit. Consists of a mixer 6, which also has functions, an intermediate frequency amplifier 7, and a detector 8.
It consists of an AM receiving section, a matrix detector 9 that performs synchronous detection, and left and right audio amplification circuits 13 and 14.

Reference numeral 20' indicates the other ear part, and this ear part 20' includes a modulator 10 and an audio amplification circuit 1.
A transmitting circuit consisting of 1 is incorporated.

12 is an ear part 2 with a built-in transmitting circuit.
This is a microphone installed at the tip of an arm member whose length can be adjusted by expanding and contracting on the outer surface of the 0'.

S1 is an AM/FM selection switch for AM/FM reception, and S4 is an antenna switch that is switched during transmission or reception operation. Note that a switch S2 is provided between the matrix detector and the amplifiers 13 and 14, and a switch S3 is provided between the microphone 12 and the amplifier 11, and these switches S2 and S3 are operated to output the sound from the microphone 12. Amplifiers 13, 14
The signal may be sent directly to each speaker (SP) via the .

Reference numeral 17 denotes a hair band section that connects both ear parts 20, 20' to form a headphone. A groove 18 is provided in this hair band portion 17, and metal members 19 and 19' that can be slid against each other are housed in this groove 18,
At least one of these metal members is connected to the high frequency amplification circuit 2 and the modulator 10 via a switch S4 to function as an antenna 22. Therefore, preferably, one metal member 19 is fixed,
The other metal member 19' may be made slidable, and one end thereof may be bent to form the knob 21 to facilitate sliding operation.

There are various configurations of FM/AM receiving circuits, and this embodiment does not specifically limit them.
One example of this will be explained with reference to Fig. 3.
The coil L1 of the tuning circuit 1 is connected to the transistor Q2 of the FM high frequency amplification circuit 2, and the antenna 22 is connected here.
give the input. Connect one terminal of the ceramic filter 15 to a resistor R1 and a transistor Q3,
The other terminal is connected via the terminal 15 of the integrated circuit A to the mixer 6 therein. One side of the local oscillation circuit 3 is connected between capacitors C1 and C2, and the other side is connected between capacitors C1 and C2.
Connect to AM/FM selection switch S1. Furthermore,
The tuned circuit 4 is connected to the mixer 6 via terminals 1 and 2 of the integrated circuit A, and the filter 16 is connected to the capacitor C3.
It is connected to the terminal 8 of the integrated circuit A, and the volume is connected to the terminal 8 of the integrated circuit A through the output terminal 9.
It is connected to VR and conducts to matrix detector 9. The sound sent through these circuits is sent from the matrix detector 9 through the switch S2 to the audio amplifiers 13 and 14, respectively, and is output from the speaker SP at an appropriate volume. C4-C31
is a capacitor, L2-L4 is a coil, Q4-Q8
is a transistor, D1 to D4 are diodes, D5
is a variable capacitance diode, and R2 to R17 are resistors. B shown in the matrix detector 9 is a connection circuit for stereo separation. The power source for driving the radio receiving circuit or oscillation circuit configured as described above may be provided by a battery built into the earpiece, or may be supplied from outside.

(6) Effect of the invention A headphone with an FM/AM receiving circuit and a radio transmitting circuit built into each ear part is worn on the user's head, and both ear parts are placed on both ears.
By operating the AM/FM selection switch S1, you can receive radio broadcasts from the earpads that are pressed against both ears.
Alternatively, radio waves transmitted from other transmitters can be received.

The changeover switch S3 is selected to the transmitting side, and the arm member provided on the ear protector 19' is adjusted to position the microphone 12 attached to the tip of the arm member at the mouth of the user. When a sound is emitted in this state, the sound passes through the amplifier 11, the modulator 10, and the switch S4, and is transmitted as a radio wave from the antenna 22. Voice communication can be performed by receiving and demodulating the FM receiving circuit of another similar transmitter/receiver that is tuned to the frequency of the transmitted radio wave. During these transmission/reception and radio reception, the lengths of the metal members 19, 19' constituting the antenna 22 are adjusted to match the frequency of the radio waves.

Also, operate switches S2 and S3 to
By sending the voice directly from 2 to the amplifiers 13 and 14, the user can confirm his or her own voice and can be applied to various conversation exercises.

(7) Effects of the Invention As explained above, according to the present invention, a radio receiving circuit and a transmitting circuit for wireless communication are built into each ear part of the headphone, and one ear part has an arm member whose length can be adjusted. A microphone is installed through the earpiece and can be positioned appropriately near the user's mouth, making it possible to properly listen to and transmit radio broadcasts or wireless communication sounds with both ears. Since it is installed along the band part, it can be used without any problems even in crowded places.It is also a high-performance transmitter and receiver that can be used not only for radio broadcasting and wireless communication, but also for various conversation practice and can be used for multipurpose purposes. Equipment can be provided.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a block circuit diagram of a transmitting/receiving device of the present invention, FIG. 2A is a partially cutaway perspective view, and FIG.
Figure B is a sectional view taken along the line AA in Figure 2A, and Figure 3 is a circuit diagram of the transmitting and receiving device. 12...Microphone, 17...Hair band section, 20,2
0'... ear parts, 22... antenna.

Claims (1)

[Claims] 1 A radio reception circuit is built into one earpad part, a transmitting/receiving circuit for wireless communication is built into the other earpad part, and an arm member having a microphone at the tip is attached to the earpad part provided with the transmitting circuit so that its length can be adjusted. A headphone type transmitting/receiving device having a radio receiving function, further comprising an antenna that is extendable and retractable along a hair band section that connects both ear pad sections to form a headphone.