CN2135888Y

CN2135888Y - Earphone volume safety device

Info

Publication number: CN2135888Y
Application number: CN 92212872
Authority: CN
Inventors: 喻湘晖
Original assignee: 喻光强
Priority date: 1992-05-18
Filing date: 1992-05-18
Publication date: 1993-06-09
Anticipated expiration: 2002-05-18

Abstract

The utility model relates to an earphone sound volume safety device, and belongs to the electronic technical field. The utility model is connected with an earphone. When the sound volume of the earphone is higher than the safety value, the utility model sends out signals to remind users or automatically lowers the sound volume in order to protect the audition of users. The utility model mainly comprises a voltage limitation device and an operation device. The utility model has the advantages of simple structure and small size, and can be used for various radio earphones and various earphones or earplugs of voice recorders, radios, hearing aid machines, hand talkies, etc.

Description

Earphone volume safety device

The utility model relates to the control device of earpiece volume, belongs to electronic technology field.

People discover recently, listen to the sound of sounder at the use earphone, particularly when listening stereo music, too much if volume is opened with personal cassette player, will damage people's auditory system, serious meeting causes people's ear to become deaf, this has caused people's extensive concern, listens earphone though require people to close small volume in the propaganda, and great actually volume is only safe, people can't grasp, and also do not have standards of measurement.The user owing to do not know this moment of safety whether, and does not know whether should close small volume often when listening a bigger volume.If turned down volume, music and sound " unfulfilling " have again been listened.Therefore, this is a problem that presses for solution.

The purpose of this utility model just provides a kind of simple electronic installation, and it links to each other with earphone, and when the volume of earphone surpassed safety value, this device can send signal and remind the user, or automatically volume is reduced.

The utility model mainly comprises pressure limiting device and final controlling element two parts, pressure limiting device and earphone parallel connection, it is equivalent to a votage control switch, when the voltage of the tone currents that flows to earphone is lower than safe voltage, this switch opens circuit, and the final controlling element that links to each other with pressure limiting device is not worked, when audio voltage surpasses safety value, the pressure limiting device conducting is started working final controlling element.This final controlling element can be an electronic warning circuit, also can be a thyrite circuit, also can the both comprise.

As the pressure limiting device among Fig. 1 is a forward biased diode, and final controlling element is an electronic alarm device.Because the forward conduction voltage of germanium diode is about 0.1V, and the audio voltage of common sounder is about 0.01V-0.2V, so D ₁Can limit high-tension tone currents.Is concrete safe voltage (being safe volume) for much? because the model of various earphones is different with impedance, in design and producing, this safe voltage can be in conjunction with the medical research achievement by adjusting regulating resistor R ₁And obtain.

Electronic alarm device among Fig. 1 is a kind of character indicator, is passing through to it under the alive situation, and this display can demonstrate the statement of " please close small volume " and so on to remind the user.Because the high pitch of audio signal always occurs intermittently, D is passed through at the place ₁Electric current be similar to pulse current, it can make display K blinking character continuously, and is very eye-catching.Because audio voltage is less, so display K preferably selects the LCD of low voltage operating for use.

Except display, also available light-emitting component of warning device of the present utility model (as LED) or sounding component (as the voltage ceramic piezo).

Fig. 2 b is an outside drawing of the present utility model, and wherein 1 is sounder, and 2 is supply hub, and 3 is earphone jack, and 4 is the volume safety device, and 5 is earplug and line thereof, and 6 is display.Fig. 2 a is the enlarged diagram of the volume safety device of earphone, and this device is placed in the root of headset plug, is beneficial to people and observes.This device also can be placed on a certain position of earphone.

Final controlling element among Fig. 1 is an alarm circuit, and for the utility model, final controlling element can also be the thyrite circuit, and its operation principle is such: with thyrite V ₁Link to each other with earphone, when volume surpassed safety value, the pressure limiting device conducting made it and the thyrite V that links to each other ₁G extremely go up to produce voltage, to change V ₁Resistance, so make and V ₁Audio signal on the earphone that links to each other decays, thereby reaches the purpose of automatic flat.

For the final controlling element that has (as LED), it is just conducting and starting working under a certain voltage, is equivalent to a pressure limiting device, and in this case, pressure limiting device of the present utility model and final controlling element can be finished by an element.

The utility model is compared with existing earphone, only need to increase a simple electronic circuit, increase an important function just can for existing earphone, the big volume of earphone and the ear-piercing howling that produces suddenly there is the better controlled effect, thereby ensure user's safe handling, have very positive social benefit.In addition, it is little that the utility model also has a volume, installs easy to carryly, original earphone tone color do not had the advantage of influence.It not only can be used for also can be used for various wireless headsets in the earphone and earplug of sounders such as recorder, hearing aid machine, walkie talkie.

Following the description of the drawings:

Fig. 1 is the utility model schematic diagram, and Fig. 2 is an outside drawing of the present utility model;

Fig. 3 is the circuit diagram of embodiment 1, and Fig. 4 is the outside drawing of embodiment 1;

Fig. 5 is the circuit diagram of embodiment 2, and Fig. 6 is the outside drawing of embodiment 2.

Below in conjunction with accompanying drawing two embodiment of the present utility model are described.

Embodiment 1 is as Fig. 3 and Fig. 4, its final controlling element be one by light-emitting diode D ₂The alarm circuit of forming is because its operating voltage height is provided with an external power E among Fig. 3 ₁, be its power supply.Wherein T is an amplifying triode, because its base voltage V _BoDuring to certain value, base current I is arranged _bOccur, so T this moment has born the effect of pressure limiting device simultaneously.R among the figure ₂Be current-limiting resistance, E ₁The most handy solar cell makes the operator compartment time will change battery.

Fig. 4 is the present embodiment outside drawing, and wherein 1 is headset plug, and 2 is solar cell, and 3 is shell, and 4 is light-emitting diode D ₂, 5 is the earphone lead.

Embodiment 2 circuit such as Fig. 5, its final controlling element are a thyrite circuit, and its operation principle is as follows: VNOS is managed V ₂As a thyrite and earphone parallel connection, V ₂D, the resistance between the S utmost point with V _GSVariation is inversely proportional to.V ₂The G utmost point and analog switch S ₁And capacitor C ₁Link to each other analog switch S ₁By regulating resistor R ₁Link to each other with the positive pole of tone currents, when the voltage of tone currents surpasses safety value, S ₁Just conducting (it is equivalent to a pressure limiting device), power supply E at this moment ₂Give capacitor C ₁Charging, C ₁On voltage constantly increase, make V ₂Resistance is more and more littler, and increasing to the decay of audio signal, then volume is more and more littler, can not make S up to audio voltage ₁Till the conducting.

In the present embodiment, VNOS manages V ₂Select N raceway groove low power tube for use,, require its grid source breakdown voltage greater than V as VN1008 VN00606 etc. _ODElectrochemical capacitor C will select the little resistance of electric leakage, because resistance is very big between G, S, can guarantee that C goes up voltage and remains unchanged for a long period of time; S ₁Available CD4066, also available micro-trigger controlled silicon SCR; Resistance R ₃Select the 1/4W fixed carbon resister of 20K for use, it is a current-limiting resistance.

To the dual track acoustics, need add VNOS pipe in addition, the G utmost point of two pipes connects together, D, the S utmost point respectively with left and right sides earphone parallel connection, to control their volume respectively.

Fig. 6 is the outside drawing of embodiment 2, and wherein 1 is headset plug, and 3 is controllable resistor R ₁Control end, 4 is shell, 5 is light-emitting diode D ₂, 6 is the earphone lead.Wherein control end 3 can move along groove 2, when its when shell is marked with the position of " normal person " in the drawings, R ₁Resistance is less, is added in S ₁, S ₁On voltage bigger; When 3 are among the figure position that indicates " deaf people ", R ₁Resistance is very big, is added in S ₁On voltage very little, S ₁Be difficult for conducting, simultaneously K switch among the figure ₁Closure, C ₁Discharge makes V ₂Connect electronegative potential.In this case, V ₂Work hardly, thereby can make earphone can be the service of the people a little less than the hearing, or in particular cases use big volume work at other.

Power supply E among Fig. 5 ₂The button cell of available 2 joint 1.5V is loaded in the shell 4, since this circuit power consumptive province, E ₂For a long time available.Certain E ₂Also can use the E that resembles among the embodiment 1 ₁Such solar cell.

Claims

1, a kind of volume safety device of earphone, it is characterized in that: this device comprises a pressure limiting device and a final controlling element, wherein pressure limiting device and earphone parallel connection, when the voltage of the tone currents that flows into earphone surpasses safety value, above-mentioned pressure limiting device conducting, the final controlling element that triggering is attached thereto is started working, and this final controlling element is an alarm circuit or a thyrite circuit.

2, volume safety device as claimed in claim 1 is characterized in that: described pressure limiting device comprises a regulating resistor R ₁

3, volume safety device as claimed in claim 1 is characterized in that: described pressure limiting device comprises a forward biased diode D ₁

4, volume safety device as claimed in claim 1 is characterized in that: described alarm circuit comprises a kind of among a character indicator, light-emitting component or the sounding component three.

5, volume safety device as claimed in claim 1 is characterized in that: described thyrite circuit comprises one or two thyrites, and the G pole tension of this thyrite is controlled by above-mentioned pressure limiting device, and this thyrite links to each other with earphone.

6, volume safety device as claimed in claim 5, it is characterized in that: described thyrite circuit also comprises an analog switch and an electric capacity, the trigger end of this analog switch links to each other with above-mentioned pressure limiting device, this analog switch provides charge circuit can for above-mentioned electric capacity, and the G that the voltage on the electric capacity then is added in above-mentioned thyrite extremely goes up.

7, volume safety device as claimed in claim 1 is characterized in that: for wired earphone, this device is placed in the root of headset plug.

8, as claim 2 or 5 described volume safety devices, it is characterized in that: described regulating resistor R ₁Be adjustable resistance, its resistance trimming control end can be operated it by the user.