CN210298037U - Sound box system convenient to switch - Google Patents
Sound box system convenient to switch Download PDFInfo
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- CN210298037U CN210298037U CN201921806713.1U CN201921806713U CN210298037U CN 210298037 U CN210298037 U CN 210298037U CN 201921806713 U CN201921806713 U CN 201921806713U CN 210298037 U CN210298037 U CN 210298037U
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- pole double
- throw switch
- operational amplifier
- amplifier module
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Abstract
The utility model relates to an audio amplifier technical field especially relates to an audio amplifier system of convenient switching. The loudspeaker comprises two sound boxes, and further comprises a first single-pole double-throw switch, a second single-pole double-throw switch and a high-pass filtering module, wherein a middle pin of the first single-pole double-throw switch is connected with an R sound channel input signal, two side pins of the first single-pole double-throw switch are respectively connected with one end of a first operational amplifier module and one end of a second operational amplifier module, a middle pin of the second single-pole double-throw switch is connected with one end of a second power amplifier module, two side pins of the second single-pole double-throw switch are respectively connected with the other end of the high-pass filtering module and the other end of the second operational amplifier module, and one end of the high-pass filtering module is connected with the other end of the first operational amplifier module. The sound box system can be used for conveniently switching the sound boxes.
Description
Technical Field
The utility model relates to an audio amplifier technical field especially relates to an audio amplifier system of convenient switching.
Background
The existing sound boxes are divided into a sound amplifying sound box and a back listening sound box, and the sound amplifying sound box needs to emit stereo sound, so that the sound amplifying sound box comprises two sound boxes, namely a left sound box and a right sound box, but the sound amplifying sound box and the back listening sound box can only be used for sound amplification, the back listening sound box can only be used for back listening, the sound amplifying sound box can be changed into the back listening sound box in the prior art, but a good effect can be achieved through repeated adjustment, and the adjustment is troublesome.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the sound box system convenient to switch is provided, and the sound box can be conveniently switched by adopting the sound box system.
The utility model adopts the technical proposal that: a sound box system convenient to switch comprises two sound boxes, namely a first sound box and a second sound box respectively, a first operational amplifier module, a first power amplifier module, a second operational amplifier module and a second power amplifier module, wherein the first operational amplifier module, the first power amplifier module and the first sound box are sequentially connected, the second power amplifier module is connected with the second sound box, the sound box system also comprises a first single-pole double-throw switch, a second single-pole double-throw switch and a high-pass filtering module, a middle pin of the first single-pole double-throw switch is connected with an R sound channel input signal, two side pins of the first single-pole double-throw switch are respectively connected with one end of the first operational amplifier module and one end of the second operational amplifier module, a middle pin of the second single-pole double-throw switch is connected with one end of the second power amplifier module, two side pins of the second single-pole double-throw switch are respectively connected with the other end of the high-pass filter module and the other end of the second operational amplifier, one end of the high-pass filter module is connected with the other end of the first operational amplifier module,
when the sound box system is in a sound amplifying working mode, the middle pin of the first single-pole double-throw switch is connected with one end of the second operational amplifier module, and the middle pin of the second single-pole double-throw switch is connected with the other end of the second operational amplifier module;
when the sound box system is in a monitoring and sound amplifying combined working mode, the middle pin of the first single-pole double-throw switch is connected with one end of the first operational amplifier module, and the middle pin of the second single-pole double-throw switch is connected with the other end of the high-pass filtering module.
Compared with the prior art in the structure more than adopting, the utility model has the advantages of it is following: realize the switching of function through two single-pole double-throw switches, switch to a public address audio amplifier and a return and listen the audio amplifier from two stereo public address audio amplifiers promptly, whole function is various like this, and it is more convenient to switch, and the user uses more comfortablely.
Preferably, the first single-pole double-throw switch and the second single-pole double-throw switch are linked. In this way, only one switch needs to be switched, and the other switch can be linked together, so that the switching is more convenient.
Preferably, a first volume adjusting module is further arranged between the first operational amplifier module and the first power amplifier module in series, and a second volume adjusting module is further arranged between the second operational amplifier module and the second single-pole double-throw switch in series. The public address volume is adjusted through the first volume adjusting module and the second volume adjusting module, so that the effect is better, and the adjustment is more convenient.
Preferably, the first volume adjusting module is linked with the second volume adjusting module. Because when as the public address, two audio amplifier are used together, so with the linkage of first volume adjustment module and second volume adjustment module, only need adjust the volume that the volume of one audio amplifier can realize adjusting two audio amplifiers, it is more convenient to adjust.
Preferably, a third sound volume adjusting module is further connected in series between the high-pass filtering module and the second single-pole double-throw switch. The third volume adjusting module is independently arranged to adjust the volume of the back-listening sound box, so that the user feels more comfortable when using the back-listening sound box.
Drawings
Fig. 1 is a block diagram of the speaker system with convenient switching according to the present invention.
Detailed Description
The present invention will be further described below with reference to specific embodiments, but the present invention is not limited to the following specific embodiments.
As shown in fig. 1, a sound box system convenient for switching mainly includes a first operational amplifier module, a second operational amplifier module, a first volume adjusting module, a second volume adjusting module, a third volume adjusting module, a first power amplifier module, a second power amplifier module, a first single-pole double-throw switch, a second single-pole double-throw switch, a first sound box and a second sound box, wherein:
the signal line of the L sound channel, the first operational amplifier module, the first volume adjusting module, the first power amplifier module and the first sound box are sequentially connected, one end of the high-pass filtering module is connected between the first operational amplifier module and the first volume adjusting module, and the other end of the high-pass filtering module is connected with one end of the third volume adjusting module;
the signal line of the R sound track is connected with the middle pin (fixed end) of a first single-pole double-throw switch S1, the upper end of two side pins of the first single-pole double-throw switch S1 is connected with one end of a first operational amplifier module, the lower end of two side pins of a first single-pole double-throw switch S1 is connected with one end of a second operational amplifier module, the other end of the second operational amplifier module is connected with one end of a second volume adjusting module, the other end of the second volume adjusting module is connected with the middle pin of the second single-pole double-throw switch S2, the upper end of two side pins of the second single-pole double-throw switch S2 is connected with the other end of a third volume adjusting module, the lower end of two side pins of the second single-pole double-throw switch S2 is connected with one end of a second power amplifier, and the other end of the second power amplifier is connected with a sound box;
the first volume adjusting module is linked with the second volume adjusting module, and the first single-pole double-throw switch is linked with the second single-pole double-throw switch;
the first operational amplifier module and the second operational amplifier module have the functions of: amplifying the signal intensity by using an operational amplifier in a normal sound amplification mode, and providing a power amplifier driven by enough voltage or current to enable the loudspeaker to reach the maximum sound pressure level; when in a listen-back mode, adding left and right channels by using the high-resistance input characteristic of the first operational amplifier and the function of the adder, wherein crosstalk cannot be generated when the left and right channel signals are added, and then amplifying the added signals again and sending the signals to the high-pass filtering module for processing and the power amplifier;
the power amplifier module is used for increasing a class-D power amplification circuit to amplify a weak signal and push the sound box to play sound because the voltage or current output by operational amplification cannot drive the sound box loudspeaker to reach the maximum sound pressure level;
a high-pass filtering module: the method has the functions of allowing high-frequency signals to pass, preventing low-frequency signals from passing, and removing unnecessary low-frequency components or low-frequency interference in the signals; in a return listening mode, the return listening box needs to lie on the ground, the bass of the bass loudspeaker sound wave of the sound box reflected to the ears of a player through the ground is more, even the low frequency interference or self-excitation is caused, so that partial low frequency is attenuated by utilizing the characteristic of the high-pass filtering module, and the bass fed back to the ears of the player is optimal;
when in normal public address mode, the user controls the two single-pole double-throw switches by controlling the switch on the control panel, the first single-pole double-throw switch S1 is thrown downwards, that is, the middle pin of the first single-pole double-throw switch is connected with the lower end pin of the two side pins, the first single-pole double-throw switch S2 is thrown downwards, namely, the middle pin of the second single-pole double-throw switch is connected with the lower end pin of the two side pins, namely, the signal generated by the L sound channel is transmitted to the first sound box through the first operational amplifier module, the first volume adjusting module and the first power amplifier module, namely, the first sound box plays the role of amplifying the left sound channel, the signal generated by the R sound channel is transmitted to the second sound box through the second operational amplifier module, the second volume adjusting module and the second power amplifier module, namely, the second sound box plays a right sound channel sound amplification function, namely the second sound box is integrally combined to realize a stereo sound amplification function;
when the mobile phone is in a listen-back mode, a user controls the two single-pole double-throw switches by controlling the switches on the control panel, the first single-pole double-throw switch S1 is thrown upwards, namely the middle pin of the first single-pole double-throw switch is connected with the upper end pins of the two side pins, and the second single-pole double-throw switch S2 is thrown upwards, namely the middle pin of the second single-pole double-throw switch is connected with the upper end pins of the two side pins; the signal that L sound track produced and the signal that the R sound track produced all are connected to first operational amplifier module one end promptly to the signal divides into two the tunnel after handling through first operational amplifier module, it is along first volume adjustment module, first power amplifier module to first audio amplifier to be all the way, realize single audio amplifier public address function promptly through first audio amplifier, another way is along high pass filter module, third volume adjustment module, second power amplifier module to second audio amplifier, because the signal has passed through the processing of high pass filter module, so the second audio amplifier has realized the function of listening back.
And structurally, when normally using as the public address audio amplifier, first audio amplifier and second audio amplifier are all vertical and place, when needs regard the second audio amplifier as the playback audio amplifier, need fall the second audio amplifier and adjust the orientation angle of second audio amplifier for the sound that the second audio amplifier produced can be better heard by the singer, and this structure is that prior art is existing, so do not expand in detail here.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (5)
1. The utility model provides a convenient audio amplifier system who switches, includes two audio amplifiers, is first audio amplifier and second audio amplifier respectively, and it still includes first operational amplifier module, first power amplifier module, second operational amplifier module and second power amplifier module, first operational amplifier module, first power amplifier module and first audio amplifier connect gradually, second power amplifier is connected its characterized in that with the second audio amplifier: the power amplifier further comprises a first single-pole double-throw switch, a second single-pole double-throw switch and a high-pass filtering module, wherein a middle pin of the first single-pole double-throw switch is connected with an R sound channel input signal, two side pins of the first single-pole double-throw switch are respectively connected with one end of a first operational amplifier module and one end of a second operational amplifier module, a middle pin of the second single-pole double-throw switch is connected with one end of a second power amplifier module, two side pins of the second single-pole double-throw switch are respectively connected with the other end of the high-pass filtering module and the other end of the second operational amplifier module, one end of the high-pass filtering module is connected with the other end of the first operational amplifier module,
when the sound box system is in a sound amplifying working mode, the middle pin of the first single-pole double-throw switch is connected with one end of the second operational amplifier module, and the middle pin of the second single-pole double-throw switch is connected with the other end of the second operational amplifier module;
when the sound box system is in a monitoring and sound amplifying combined working mode, the middle pin of the first single-pole double-throw switch is connected with one end of the first operational amplifier module, and the middle pin of the second single-pole double-throw switch is connected with the other end of the high-pass filtering module.
2. The loudspeaker system of claim 1, wherein: the first single-pole double-throw switch is linked with the second single-pole double-throw switch.
3. The loudspeaker system of claim 1, wherein: a first volume adjusting module is further arranged between the first operational amplifier module and the first power amplifier module in series, and a second volume adjusting module is further arranged between the second operational amplifier module and the second single-pole double-throw switch in series.
4. A loudspeaker system of claim 3, wherein: the first volume adjusting module is linked with the second volume adjusting module.
5. The loudspeaker system of claim 4, wherein: and a third sound volume adjusting module is also arranged between the high-pass filtering module and the second single-pole double-throw switch in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921806713.1U CN210298037U (en) | 2019-10-25 | 2019-10-25 | Sound box system convenient to switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921806713.1U CN210298037U (en) | 2019-10-25 | 2019-10-25 | Sound box system convenient to switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210298037U true CN210298037U (en) | 2020-04-10 |
Family
ID=70064821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921806713.1U Active CN210298037U (en) | 2019-10-25 | 2019-10-25 | Sound box system convenient to switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210298037U (en) |
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2019
- 2019-10-25 CN CN201921806713.1U patent/CN210298037U/en active Active
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