CN2602571Y

CN2602571Y - Earphone

Info

Publication number: CN2602571Y
Application number: CN 02259462
Authority: CN
Inventors: 宋宝辉
Original assignee: TOONG IN ELECTRIC CORP
Current assignee: TOONG IN ELECTRIC CORP
Priority date: 2002-10-10
Filing date: 2002-10-10
Publication date: 2004-02-04
Anticipated expiration: 2012-10-10

Abstract

The utility model relates to an earphone, which mainly provides a microphone on the outside of the earphone, the microphone is connected with a circuit wafer which is connected with a speaker; thereby, when the microphone receives a noise from the outside environment, high and low frequencies of the noise will be firstly strained by a bandpass filtering circuit on the circuit wafer, then a reverse amplifying circuit produces a 180 degrees reverse waveform and enters a power amplifier with a music source at the same time for counteracting the noise, whereby the noise which enters the ears of people can be reduced to the minimum for achieving the best clear degree of the listening music.

Description

Earphone

Technical field

The utility model relates to a kind of earphone.

Background technology

Raising along with people's living standard, requirement for quality of the life also improves relatively, with appreciation film, music is example, normally play, but because of the attribute difference, if some music or film be not loud with suitable volume, then can't fully show the impact of self, but,, can hinder neighbours's peacefulness though can experience its impact if sound is amplified.

For head it off, common mode is independently to be separated out a zone, should be isolated with sound panel (wall) or abatvoix (wall) in the zone, make this zone form an audiovisual studio, sound in the audiovisual studio is separated by sound panel or absorb, and can not influence other people peacefulness, but that this mode need spend is expensive, simultaneously use in this mode place that can only be confined to be provided with audiovisual studio, does not quite have mobility; Do not belong to and can solve the non-Headphone structure of mobility issues, but earphone only can hear and play sound, but can't intercept other outer sound of earphone, the sound of playing in the earphone is mixed with external noise, can't clearly hear the sound of knowing broadcast, quite undesirable.

Summary of the invention

In order to solve the existing in prior technology problem, the utility model provides a kind of improved earphone, and not only cost is low for it, can eliminate external noise again simultaneously, is not subjected to external noise effect, can know and listen to music.

Earphone described in the utility model mainly is the microphone that is provided with a reception noise in the earphone outside, and this microphone is connected on the circuit board, and this circuit board is connected with loudspeaker again; Bandwidth-limited circuit output on this circuit board is connected to the input of see-saw circuit, and this see-saw circuit produces 180 degree phase anti-waveforms, and then in music source ingoing power amplifier, with noise cancellation.

Circuit on this circuit board of the utility model is by a plurality of resistance, electric capacity, triode, power amplifier, a light-emitting diode, and a diode is formed bandwidth-limited circuit and see-saw circuit.

This circuit board of the utility model is provided with the switch that extends to the earphone outer rim, starts with convenient.

This earphone of the utility model is one to have the earphone chamber with the complete fit of user's ear.

The utility model only needs to add microphone that receives external noise and the circuit board that produces anti-phase sound wave on original Headphone structure, take this with the external noise of cancelling out each other, except keeping the mobility of earphone, possesses the function of eliminating external noise more simultaneously, and, need not spend heavy sugar and manpower and build audiovisual studio, both left other people peacefulness alone, again can clear music appreciating, have the effect of saving cost.

Description of drawings

Fig. 1 is the stereo appearance figure of the utility model embodiment.

Fig. 2 is the detailed circuit diagram of the utility model embodiment.

Fig. 3 is the use schematic diagram of the utility model embodiment.

Symbol is to as directed among the figure:

10 earphones

Earphone chambers 11

12 circuit boards

121 bandwidth-limited circuits

122 see-saw circuits

123 power amplifiers

124 switches

13 microphones

14 loudspeaker

Embodiment

Referring to Fig. 1, the utility model mainly is to be provided with the microphone 13 that a radio reception is used at the earphone chamber of earphone 10 11 lateral borders, and this microphone 13 is connected on the circuit board 12, and circuit board 12 is connected with loudspeaker 14 again, takes this to finish the utility model.

As shown in Figure 2, the wherein bandwidth-limited circuit 121 formed by a plurality of resistance, electric capacity, triode, power amplifier 123, LED, diode and switch 124 of this circuit board 12, and see-saw circuit 122; When being in quiet environment, switch 124 can not opened, and this earphone 10 is for transmitting the general earphone of music; When environment change of living in becomes when noisy, the music source that earphone 10 transmits is interfered, and the user can't clearly hear the music of broadcast.

As shown in Figure 3, at this moment, open switch 124, this microphone 13 receives outside environmental noise, the sound wave that order receives enters bandwidth-limited circuit 121, high frequency and low frequency filtering with the noise sound wave then enter negative circuit 122, will produce waveforms identical but opposite 180 degree of direction, and amplified with music source ingoing power amplifier 123 in the lump, take this external noise is cancelled out each other, the music that allows earphone 10 transmit originally is interference-free, and can clearly enter in user's the ear by loudspeaker 14.

The above only is preferred embodiment of the present utility model, and when can not be in order to limit the enforceable scope of the utility model, all professional person obviously can do to change and modify, and all should be considered as not departing from flesh and blood of the present utility model.

Claims

1. an earphone mainly is the microphone that is provided with a reception noise in the earphone outside, and this microphone is connected to a circuit board, and this circuit board links to each other with loudspeaker again; It is characterized in that: the bandwidth-limited circuit on this circuit board (121) output is connected to the input of see-saw circuit (122), and this see-saw circuit (122) produces 180 degree phase anti-waveforms, and then in music source ingoing power amplifier (123).

2. earphone as claimed in claim 1 is characterized in that: this circuit board (12) is provided with the switch (124) that extends to earphone (10) outer rim.

3. earphone as claimed in claim 1 is characterized in that: this earphone (10) is one to have the earphone chamber (11) with the complete fit of user's ear.