CN2582312Y

CN2582312Y - 5.1 sound channel digital circulating sound earphone

Info

Publication number: CN2582312Y
Application number: CN 02248305
Authority: CN
Inventors: 颜聪裕
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-09-27
Filing date: 2002-09-27
Publication date: 2003-10-22
Anticipated expiration: 2012-09-27

Abstract

The utility model belongs to the technical field of electronic products, particularly to a 5.1 sound channel digital circulating earphone. The utility model comprises an earphone body and a line controller, wherein, the earphone body is connected with the line controller by a conducting wire; an input end of the line controller is connected with a power amplifier box; the power amplifier box comprises a power input unit, a voltage-stabilizing filter circuit, an amplifying circuit and a signal input port of 5.1 sound channel, wherein, an external power source is input to the voltage-stabilizing filter circuit by the power source input unit, the electricity of the amplifying circuit is supplied by the output electricity of the voltage-stabilizing filter circuit, an input end of the amplifying circuit is connected with a signal input end of the 5.1 sound channel, and while an output end of the amplifying circuit is connected with the line controller. The utility model can increase the signal-to-noise ratio, can reduce distortion ratio and can realize favorable playback effect by the power amplification and wave filtering of the power amplifier box. Therefore, the alt and the mediant of the utility model can be shown sufficiently, and the auditory impression of the mediant and the bourdon is comfort. The utility model has favorable digital surrounding effect. Meanwhile, the earphone adopts the design of opening earphone shell type. Therefore, the utility model has the advantages of clear sound, and comfortable wear. When used, the earphone can not affect other people.

Description

5.1 sound channel digital circulating earphone

Technical field:

The utility model relates to technical field of electronic products, refers in particular to a kind of 5.1 sound channel digital circulating earphones.

Background technology:

Along with the continuous development of electronic technology, people are more and more higher to acoustic requirement, audio devices also from monophone, stereo to the system development of Doby logical orientation to the digital circulating type.Nowadays DVD is through in a few years development course, because its CD capacity is bigger, and clear picture, and advantage such as the sound equipment truth function is more, and is easy to use, its popularity rate is also more and more higher thereupon.When appreciating film with DVD usually,, need to be equipped with 5.1 sound channel power amplifiers for reaching best home theater effect, connect six audio amplifiers that match again, greatly take up room and lay six audio amplifiers, and connecting line is more, extremely inconvenient, the volume of use simultaneously is bigger, can influence other people and have a rest.

Summary of the invention:

The purpose of this utility model is to provide a kind of digital circulating effect that has, the 5.1 sound channel digital circulating earphones that are easy to carry and use.

The utility model is achieved by the following technical solution: the input that connects the line control machine of earphone body is connected with a power amplifier box, this power amplifier box includes power input unit, filter circuit of pressure-stabilizing, amplifying circuit and 5.1 sound channel signal input ports, external power is input to filter circuit of pressure-stabilizing by power input unit, amplifying circuit is by the output electricity power supply of filter circuit of pressure-stabilizing, the input of amplifying circuit is connected with 5.1 sound channel signal input ports, and the output of amplifying circuit is connected with line control machine, and the IC integrated package that is used for power amplification in the amplifying circuit also is connected with audio frequency shunt capacitance and coupling capacitance; Also be provided with the 5.1 sound channel signal output ports that are used for directly connecting other corresponding power amplifier on the described power amplifier box, the output of the amplifying circuit of this power amplifier box is provided with 7 needle sockets, and the link of corresponding line control machine adopts 7 pin plugs to match; Described line control machine is provided with change over switch and the volume potentiometer between CD and the DVD.

The utility model is by the power amplification and the filtering of power amplifier box, improve signal to noise ratio, reduce distortion rate, can realize good replaying effect, high middle pitch performance fully, and middle bass sense of hearing is comfortable, have good digital circulating effect, earphone adopts open ear shell design simultaneously, and sound is clear, wear comfortablely, can not influence other people during use.

Description of drawings:

Accompanying drawing 1 is a functional-block diagram of the present utility model;

Accompanying drawing 2 is a structural representation of the present utility model;

Accompanying drawing 3 is embodiment physical circuit figure of the present utility model.

Embodiment:

See accompanying drawing 1～3, the utility model includes earphone body 1 and line control machine 2, has lead to be connected between earphone body 1 and the line control machine 2.The input of line control machine 2 is connected with a power amplifier box 3, and power amplifier box 3 includes power input unit 31, filter circuit of pressure-stabilizing 32, amplifying circuit 33,5.1 sound channel signal input ports 34 and is used for directly connecting 5.1 sound channel signal output ports 35 of other corresponding power amplifier.External power is input to filter circuit of pressure-stabilizing 32 by power input unit 31, and amplifying circuit 33 is by the output electricity power supply of filter circuit of pressure-stabilizing 32, and the IC integrated package that is used for power amplification in the amplifying circuit 33 is connected with audio frequency shunt capacitance and coupling capacitance; The input of amplifying circuit 33 is connected with 5.1 sound channel signal input ports 34, and the output of amplifying circuit 33 is connected with line control machine 2, the output of amplifying circuit 33 is provided with 7 needle sockets, the link of corresponding line control machine 2 adopts 7 pin plugs to match, and line control machine 2 is provided with change over switch 21 and the volume potentiometer between CD and the DVD.

During use, by lead power amplifier box 3 is connected with the external power of 7.5VDC, import by the XSIDC supply socket, after mains switch control by electrochemical capacitor C32 filtering, ceramic disc capacitor C31 filtering high frequency and interference signal are adjusted into the 5V stable DC by external power after the IC4 voltage stabilizing of filter circuit of pressure-stabilizing 32.The filter circuit that power supply after the voltage stabilizing composes in parallel through electrochemical capacitor C29 and ceramic disc capacitor C30 again, the storage power of charging simultaneously, one road power supply through resistance R 19 step-down current limlitings through the luminous power supply indicator of doing of LED; Another road power supply powers and makes it operate as normal for IC1, IC2, IC3 simultaneously, IC1, IC2, IC3 positive source 2 pin and power supply ground 4 pin are parallel to electric capacity of the dacron C21, C24, C27 respectively, eliminate the interference signal of power circuit induction with this, also, guarantee that IC1, IC2, IC3 avoid various interference and steady operation for amplifying circuit 33 provides radio circuit.Six tunnel 5.1 channel audio signal (FL, FR, RL, RR, C, SUB) through the output of decoding back are imported from CZ1, CZ2, the CZ3 socket of 5.1 sound channel signal input ports 34 of power amplifier box 3, earlier by C1～C6 electric capacity respectively to the induction of six pass lines and interference signal filtering to ground, again by after resistance R 1～R12 series connection dividing potential drop, 6,7 pin input from IC1～IC3,5,8 pin of IC1～IC3 are connected with audio frequency shunt capacitance C7～C12 respectively, make audio signal unblocked at the amplification process energy.After IC1～IC3 power amplification, export by 1,3 pin of IC1～IC3 respectively, high frequency correction network through being composed in series by resistance R 13～R18 and capacitor C 20, C22, C23, C25, C26, C28 is respectively eliminated self-excitation signal, and audio signal is outputed to 7 needle sockets (on the CZ-1～CZ-7) by electrochemical capacitor C14～C19 coupling.7 pin plugs that are connected with line control machine 2 (CT1～CT7) peg graft 7 needle sockets (behind the CZ-1～CZ-7) with six tunnel 5.1 sound channel signals through three duplex potentiometer VR1～VR3 on the line control machine 2 carry out volume control respectively to FL, FR, RL, RR, C after, promote loudspeaker SP1～SP6 and send corresponding sound.Wherein center channels is finished playback jointly by the loudspeaker in the left and right auricular concha (SP5, SP6), mega bass (SUB) is reset by the vibrator on the left and right auricular concha (SP7, SP8) series connection, thereby produce the mega bass effect, in order to eliminate vibratory murmur, remove the medium-high frequency signal in the further bypass of SUB power amplifier input electrochemical capacitor C13 in parallel, keep low frequency signal and enter amplifier.

The line control machine 2 of the utility model is provided with volume potentiometer VR1～VR3 and CD, DVD change over switch SW1, make appreciation CD or DVD can reach the optimal audio effect, also be provided with simultaneously the 5.1 sound channel signal output ports 35 that are used for directly connecting other corresponding power amplifier (CZ4～CZ6) on the power amplifier box 3, so that can emit from audio amplifier, appreciate simultaneously for more people; And the microphone on the earphone body 1 can receive sound and is directly inputted to DVD player and realizes speech, sing.

The used main unit of specific embodiment in this specification, the device detail list is as follows: unit, device symbol unit, the device name model, specification IC1～IC3 integrated circuit TDA2822IC4 integrated circuit 7805C1～C6 electric capacity of the dacron 472C7～C12 electrochemical capacitor 47UF 16VC20, C22, C23 electric capacity 104C25, C26, C28 electric capacity 104C21, C24, C27 electric capacity of the dacron 104C29, C32 electrochemical capacitor 1000UF 16VC30, C31 ceramic disc capacitor 104R1～R5 resistance 10KR6 resistance 4K7R7～R10 resistance 1KR11 resistance 820R12 resistance 8K2R13～R18 resistance 2R2R19 resistance 1KVR1～VR3 variable resistor 1KC13 electrochemical capacitor 3.3UF 16VC14～C18 electrochemical capacitor 220UF 16VC19 electrochemical capacitor 470UF 16V

Claims

1,5.1 sound channel digital circulating earphone, include earphone body (1) and line control machine (2), earphone body (1) has lead to be connected with the output of line control machine (2), it is characterized in that: the input of line control machine (2) is connected with a power amplifier box (3), this power amplifier box (3) includes power input unit (31), filter circuit of pressure-stabilizing (32), amplifying circuit (33) and 5.1 sound channel signal input ports (34), external power is input to filter circuit of pressure-stabilizing (32) by power input unit (31), amplifying circuit (33) is by the output electricity power supply of filter circuit of pressure-stabilizing (32), the input of amplifying circuit (33) is connected with 5.1 sound channel signal input ports (34), and the output of amplifying circuit (33) is connected with line control machine (2).

2,5.1 sound channel digital circulating earphones according to claim 1 is characterized in that: also be provided with the 5.1 sound channel signal output ports (35) that are used for directly connecting other corresponding power amplifier on the described power amplifier box (3).

3,5.1 sound channel digital circulating earphones according to claim 1 is characterized in that: the output of the amplifying circuit (33) of described power amplifier box (3) is provided with 7 needle sockets, and the link of corresponding line control machine (2) adopts 7 pin plugs to match.

4,5.1 sound channel digital circulating earphones according to claim 1 is characterized in that: the IC integrated package that is used for power amplification in the described amplifying circuit (33) also is connected with audio frequency shunt capacitance and coupling capacitance.

5,5.1 sound channel digital circulating earphones according to claim 1 is characterized in that: described line control machine (2) is provided with the change over switch (21) between CD and the DVD and is used to control the potentiometer of earpiece volume.