JP3279687B2 - Wireless headphone device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless headphone device and, more particularly, to a device for outputting an alarm sound when headphones are separated from a device body by a predetermined distance or more.

[0002]

2. Description of the Related Art There is a portable recording / reproducing apparatus or a radio receiver to which wireless headphones are attached so that only headphones can be worn and listened to. It is convenient because you can listen to music while keeping it in the place. However, on the other hand, there are problems such as leaving the main unit on a net shelf or the like and getting off the vehicle, or leaving the main unit away from the hand, so that even if it is taken away by another person, the sound is not noticed until the sound is no longer heard.

[0003]

SUMMARY OF THE INVENTION In view of the above, according to the present invention, when the headphone unit is separated from the main unit by a predetermined distance or more, an alarm sound is output from the headphone, or an alarm sound is output from the main unit. It is to provide something to do.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention modulates a voice or the like into a required high-frequency signal and transmits a weak radio wave. And a first headphone section provided in the headphone section for receiving a signal from the main body section.
A receiving section, a signal strength detecting section for detecting the strength of the signal received by the first receiving section, a reference value setting section for setting a reference value of the signal strength, and a reference value setting section for receiving a signal from the signal strength detecting section. a determination unit for comparing and determining that more data, an alarm generator for generating an alarm sound based on a signal from the determination unit, the warning onset
Modulate the signal from the raw part to the required high-frequency signal and use a weak radio wave
A transmitting unit for transmitting, the first receiving unit, a signal strength detecting unit,
Reference value setting unit, determination unit, made of a first control unit that controls an alarm generation unit and transmitting unit, wherein f is provided on the main body portion
A second receiving unit for receiving and demodulating a signal from the microphone unit;
An alarm detector that detects an alarm sound based on a signal from the second receiver
Output an alarm sound based on the signal from the alarm detector.
Control section, the second reception section, the alarm detection section, and the output section.
A second control unit that outputs the alarm sound from the alarm generation unit from the headphone and also from the main unit.
There is provided a wireless type headphone apparatus that that.

[0005]

With the above construction, in the wireless headphone device according to the present invention, when the radio wave from the main body received by the headphone section falls below a required level, an alarm sound is generated and output from the headphone. I do. Also,
This alarm sound is transmitted to the main unit by a weak radio wave, received by the main unit, and outputs an alarm sound.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the wireless headphone device according to the present invention will be described in detail. FIG. 1 is a block diagram of a main part of an embodiment of a wireless headphone device according to the present invention. In the figure, A is a headphone unit, and B is a main unit. A headphone unit A 1 is a transmitting / receiving unit that receives a radio wave from the main unit B and transmits a weak radio wave to the main unit B. Reference numeral 2 denotes a signal strength detection unit which detects the level of a signal received and demodulated by the transmission / reception unit 1. A reference value setting unit 3 stores a reference value of the signal strength. Reference numeral 4 denotes a discriminating unit which compares the signal from the signal strength detecting unit 2 with the value from the reference value setting unit 3 and outputs a signal when the signal is equal to or smaller than the reference value. Determine the identification signal. Reference numeral 5 denotes an alarm generation unit that generates an alarm sound based on a signal from the determination unit 4. Reference numeral 6 denotes an output unit that outputs an alarm sound from the alarm generation unit 5. A control unit 7 controls each unit of the headphone unit A.

A transmission / reception unit 8 of the main unit B modulates a sound or the like reproduced from a magnetic recording tape or a compact disk into a required high-frequency signal and transmits it to the headphone unit A by a weak radio wave. The radio wave from A is received. Reference numeral 9 denotes an alarm detection unit which detects an alarm sound from a signal received by the transmission / reception unit 8. An output unit 10 outputs an alarm sound based on a signal from the alarm unit 9. Reference numeral 11 denotes an identification signal generation unit that generates an individually set identification signal. A control unit 12 controls each unit of the main unit B.

Next, the operation of the wireless headphone device according to the present invention will be described. The sound or the like reproduced from the magnetic recording tape or the compact disk or the like in the main body B is modulated into a required high-frequency signal, and transmitted through the transmission / reception unit 8 as a weak radio wave. The radio wave from the main unit B is received and demodulated by the transmission / reception unit 1 of the headphone unit A, and is output from the headphone or the earphone via the output unit 6. The signal received and demodulated by the transmission / reception unit 1 is input to the signal strength detection unit 2 via the control unit 7, and detects, for example, the average value of the signal amplitude.
The signal from the signal strength detection unit 2 is sent to the determination unit 4 via the control unit 7.
And compares it with the reference value of the signal strength set by the reference value setting unit 3, and outputs a signal when the signal strength is equal to or less than the reference value. The reference value set by the reference value setting unit 3 is considered to be such that the headphone unit is not used at a distance further than the main unit under normal use conditions. Set. Based on the signal from the determination unit 4, a required alarm sound is generated by the alarm generation unit 5 via the control unit 7, and output from headphones or the like via the output unit 6.

The signal from the alarm generator 5 is simultaneously modulated into a required high-frequency signal and transmitted via the transmitter / receiver 1 as a weak radio wave. Note that this radio wave may be transmitted using, for example, a radio wave set for signal transmission to the main body B for operation of the main body B.

The radio wave transmitted from the transmitting / receiving section 1 is
The signal is received and demodulated by the transmitting / receiving section 8 of the controller, detected by the alarm detecting section 9 via the control section 12, and based on the detection, an alarm sound is output via the output section 10.

It is also conceivable that a similar wireless headphone device is nearby, and the headphone unit A receives radio waves from another main unit. In such a case, even if the main part B is taken away, the signal intensity during reception does not decrease, and no alarm sound is output. For this reason, the identification signal may be transmitted from the main body B by superimposing it on a signal such as a voice, and an alarm sound may be output when the identification signal is no longer determined. In this case, the identification signal generator 11 of the main body B
Thus, for example, a signal of several tens of kilohertz is generated, superimposed on voice or the like, modulated, and transmitted. Then, the signal received and demodulated by the transmitting / receiving section 1 of the headphone section A is input to the discriminating section 4, and the identification signal is taken out through a filter or the like. Output. Alternatively, the identification signal generator
11 generates a required code, modulates and transmits this code appropriately on voice, etc., detects it with the headphone unit A, compares it with the identification code stored in advance, and finds no match Alternatively, an alarm sound may be output.

[0012]

As described above, according to the wireless headphone device of the present invention, when the headphone unit is separated from the main unit by a predetermined distance or more, an alarm sound is output from the headphone or the like, or at the same time, the main unit is output. Since the alarm sound is also output from, for example, if you leave the main unit on the net rack of the train and get off, or have the convenience that can quickly respond to the case where the main unit is taken away is there.

[Brief description of the drawings]

FIG. 1 is a main part block diagram of one embodiment of a wireless headphone device according to the present invention.

[Explanation of symbols]

 A headphone section B body section 1 transmitting / receiving section 2 signal strength detecting section 3 reference value setting section 4 discriminating section 5 alarm generating section 6 output section 7 control section 8 transmitting / receiving section 9 alarm detecting section 10 output section 11 identification signal generating section 12 control section

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G08B 19/00-21/24 H04B 1/02-1/06 H04B 1/16 H04Q 7/00-7/04

Claims (2)

(57) [Claims] 1. A head unit for modulating a sound or the like into a required high-frequency signal and transmitting the signal as a weak radio wave, and a headphone unit for receiving a radio wave from the main unit and outputting a demodulated sound or the like, and provided in the headphone unit. A first receiving unit that receives a signal from the main unit, a signal strength detecting unit that detects the strength of the signal received by the first receiving unit, a reference value setting unit that sets a reference value of the signal strength, and the signal strength A discriminating unit for comparing and discriminating a signal from the detecting unit with data from the reference value setting unit, an alarm generating unit for generating an alarm sound based on the signal from the discriminating unit, and an alarm
Modulates the signal from the generator to the required high-frequency signal and generates a weak radio wave
In a transmission unit for transmitting said first reception unit, the signal strength detection unit, the reference value setting unit, determination unit, made of a first control unit that controls an alarm generation unit and the transmission unit, before being provided in the body portion
A second receiving unit for receiving and demodulating a signal from the headphone unit
And an alarm detection for detecting an alarm sound based on a signal from the second receiver.
Outputs an alarm sound based on the signal from the output unit and the alarm detection unit.
An output unit, the second reception unit, an alarm detection unit, and an output unit
It in a second control unit for controlling, leaving also an alarm sound from the alarm unit from the main unit to output from the headphone
Wireless type headphone device designed to force. 2. An identification signal generating section is provided in said main body section, and an individually set identification signal is generated, superimposed on voice or the like, modulated and transmitted by a weak radio wave.
The signal received and demodulated via a reception unit inputs to the determination unit, when the identification signal is not discriminated, claim 1 which is adapted to output from the main body and outputting an alarm sound from the headphone A wireless headphone device as described.