CN206433132U - A kind of active audio amplifier - Google Patents
A kind of active audio amplifier Download PDFInfo
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- CN206433132U CN206433132U CN201720066656.2U CN201720066656U CN206433132U CN 206433132 U CN206433132 U CN 206433132U CN 201720066656 U CN201720066656 U CN 201720066656U CN 206433132 U CN206433132 U CN 206433132U
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- output end
- audio amplifier
- temperature
- active audio
- connection jaws
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Abstract
The utility model discloses a kind of active audio amplifier, including housing, and the audio connection jaws of back side of shell are arranged at, and are arranged at the power board of case inside, and be arranged at the positive loudspeaker unit of housing；And the power circuit powered to power board, the audio connection jaws are connected to loudspeaker unit by power board；The audio connection jaws output end is simultaneously connected to signal strength detector；The signal strength detector is electrically connected to electric-controlled switch control end；The electric-controlled switch two ends are serially connected between audio connection jaws and power board.Active audio amplifier of the present utility model, can protect power amplifier and loudspeaker, while ensureing the practical security of transformer.
Description
Technical field
The utility model is related to a kind of audio amplifier, and in particular to a kind of active audio amplifier, belongs to active audio amplifier technical field.
Background technology
Active audio amplifier is also known as active audio amplifier；Typically refer to the audio amplifier with power amplifier, such as multimedia computer sound
Case, active super low voice box, and some new home theater active audio amplifiers etc.；Active audio amplifier due to built-in power amplifier,
The problem of user need not consider to match with amplifier, while also allowing for being directly driven with more low level audio signal；It is active
Audio amplifier refers to the class audio amplifier that autogamy power amplifier is housed inside audio amplifier；Because the power amplifier of active audio amplifier has been carried out specially
Matched design, so these power amplifiers can preferably be used to promote the loudspeaker in audio amplifier, so as to allow user to be not required to go to consider again
The power of power amplifier has the problems such as whether much and impedance matches；Further, since being also equipped with audio amplifier in the front of amplifier
Just the electronic frequency divider divided and every power amplifier are merely responsible for amplifying the sound signal of a band frequency, so amplifier
Efficiency can often be made high, and distortion is also relative can be with smaller；Such as Chinese Patent Application No.：201220270430.1, it is public
A kind of Multifunctional active loudspeaker box is opened；It includes sound box bodies, be provided with sound box bodies high pitch loudspeaker, woofer and
Echo hole, the outer surface of sound box bodies is provided with the access device of the jack being connected with power supply and source of sound input, and switch, volume control
System and station selector, provided with the power amplifier and receipts between source of sound and high pitch loudspeaker, woofer in sound box bodies
Sound machine, it is characterized in that be provided with wireless blue tooth transmitting device in sound box bodies, the access device of described source of sound input refer to USB,
The socket of SD card, mmc card, the remote control with CD player, VCD, DVD, MP3 connection spliced eye and for multi-functional remote-control active audio amplifier
Receptor hole.It has the access port of connection most of source of sound input at present, easy to control, the wide advantage of applicability；But its
Input is not protected, if external power amplifier, may be burnt, meanwhile, if be in the broadcasting of long-time high pitch, it will also result in change
Depressor burns.
Utility model content
To solve the above problems, the utility model proposes a kind of active audio amplifier, power amplifier and loudspeaker can be protected, together
When ensure transformer practical security.
Active audio amplifier of the present utility model, including housing, and the audio connection jaws of back side of shell are arranged at, and it is arranged at shell
The power board of internal side, and it is arranged at the positive loudspeaker unit of housing；And the power circuit powered to power board, the audio connects
Line mouthful is connected to loudspeaker unit by power board；It is characterized in that：The audio connection jaws output end is simultaneously connected to signal intensity inspection
Survey device；The signal strength detector is electrically connected to electric-controlled switch control end；The electric-controlled switch two ends are serially connected with audio wiring
Between mouth and power board.
As preferred embodiment, the signal strength detector is made up of signal comparator；The signal comparator
Output end is electrically connected to electric-controlled switch control end.
As preferred embodiment, temperature inductor is installed on the inside of its Transformer Winding of the power circuit；It is described
Temperature inductor electrically connects temperature-control circuit；The temperature-control circuit output end is connected to transformer output end.
As preferred embodiment, the transformer output end is simultaneously connected to big capacity electrolyte capacitor.
As preferred embodiment, the temperature-control circuit includes the modulate circuit electrically connected with temperature sensor,
The modulate circuit output end is electrically connected with temperature comparator；The temperature comparator output end is connected with trigger switch；It is described
Trigger switch is connected to transformer output end.
As preferred embodiment, the loudspeaker unit is made up of an at least HiFi Speakers.
Compared with prior art, active audio amplifier of the present utility model can protect power amplifier and loudspeaker to the utility model
, while ensureing the practical security of transformer.
Brief description of the drawings
Fig. 1 is the overall structure diagram of embodiment 1 of the present utility model.
Fig. 2 is the overall structure diagram of embodiment 2 of the present utility model.
Embodiment
Embodiment 1：
As shown in figure 1, active audio amplifier of the present utility model, including housing 1, and it is arranged at the audio wiring at the back side of housing 1
Mouth 2, and the power board 3 of case inside is arranged at, and it is arranged at the positive loudspeaker unit 4 of housing；And the electricity powered to power board
Source circuit 5, the audio connection jaws 2 are connected to loudspeaker unit 4 by power board；The output end of audio connection jaws 2 is simultaneously connected to
Signal strength detector 5；When outside external power amplifier, when signal strength detector is detected more than threshold value, outside input is disconnected
Signal；The signal strength detector 6 is electrically connected to the control end of electric-controlled switch 7；The two ends of electric-controlled switch 7 are serially connected with audio and connect
Between line mouthful 2 and power board 3.
Embodiment 2：
Active audio amplifier of the present utility model, the signal strength detector 6 is made up of signal comparator；The signal compares
Device output end is electrically connected to the control end of electric-controlled switch 7；Reference signal port is used as by Single port, while another port gathers sound
Frequency connection jaws data, when a threshold is exceeded, signal comparator saltus step（As high level turns low level）, skip signal control is automatically controlled to open
Pass is acted.
Embodiment 3：
As shown in Fig. 2 being provided with temperature on the inside of active audio amplifier of the present utility model, its winding of transformer 8 of the power circuit 5
Spend inductor 9；The temperature inductor 9 electrically connects temperature-control circuit 10；The output end of temperature-control circuit 10 is connected to
Transformer output end；By temperature inductor collecting temperature signal, reach after threshold value, temperature-control circuit makes respective response.
The temperature-control circuit 9 includes the modulate circuit electrically connected with temperature sensor, and the modulate circuit output end is electrically connected with
Temperature comparator；The temperature comparator output end is connected with trigger switch；The trigger switch is connected to transformer output end；
Reference signal port is used as by Single port, while another port gathers transformer real time temperature data, when a threshold is exceeded（Such as
110℃）, signal comparator saltus step（As high level turns low level）, skip signal control trigger switch action, disconnect transformer it is defeated
Go out.
As shown in Fig. 2 the output end of transformer 8 and being connected to big capacity electrolyte capacitor 11.The loudspeaker unit 4 is by least
One HiFi Speakers are constituted.
Using it is above-mentioned according to desirable embodiment of the present utility model as enlightenment, pass through above-mentioned description, related work people
Member can carry out various changes and amendments in the range of without departing from this utility model technological thought completely.This reality
The content on specification is not limited to new technical scope, it is necessary to its technology is determined according to right
Property scope.
Claims (6)
1. a kind of active audio amplifier, including housing, and the audio connection jaws of back side of shell are arranged at, and it is arranged at the work(of case inside
Plate is put, and is arranged at the positive loudspeaker unit of housing；And the power circuit powered to power board, the audio connection jaws pass through work(
Put plate and be connected to loudspeaker unit；It is characterized in that：The audio connection jaws output end is simultaneously connected to signal strength detector；The letter
Number intensity detector is electrically connected to electric-controlled switch control end；The electric-controlled switch two ends be serially connected with audio connection jaws and power board it
Between.
2. active audio amplifier according to claim 1, it is characterised in that：The signal strength detector is by signal comparator structure
Into；The signal comparator output end is electrically connected to electric-controlled switch control end.
3. active audio amplifier according to claim 1, it is characterised in that：Installed on the inside of its Transformer Winding of the power circuit
There is temperature inductor；The temperature inductor electrically connects temperature-control circuit；The temperature-control circuit output end is connected to change
Depressor output end.
4. active audio amplifier according to claim 3, it is characterised in that：The transformer output end is simultaneously connected to Large Copacity electrolysis
Electric capacity.
5. active audio amplifier according to claim 3, it is characterised in that：The temperature-control circuit includes and temperature sensor
The modulate circuit of electrical connection, the modulate circuit output end is electrically connected with temperature comparator；The temperature comparator output end connects
It is connected to trigger switch；The trigger switch is connected to transformer output end.
6. active audio amplifier according to claim 1, it is characterised in that：The loudspeaker unit is by an at least HiFi Speakers structure
Into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720066656.2U CN206433132U (en) | 2017-01-20 | 2017-01-20 | A kind of active audio amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720066656.2U CN206433132U (en) | 2017-01-20 | 2017-01-20 | A kind of active audio amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206433132U true CN206433132U (en) | 2017-08-22 |
Family
ID=59583556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720066656.2U Active CN206433132U (en) | 2017-01-20 | 2017-01-20 | A kind of active audio amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206433132U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110868656A (en) * | 2019-11-21 | 2020-03-06 | 安徽井利电子有限公司 | Speaker box and speaker system for speaker |
-
2017
- 2017-01-20 CN CN201720066656.2U patent/CN206433132U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110868656A (en) * | 2019-11-21 | 2020-03-06 | 安徽井利电子有限公司 | Speaker box and speaker system for speaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 510000 803, Tian'an science and technology development building, Panyu energy saving science and Technology Park, No. 555, Panyu Avenue North, Donghuan street, Panyu District, Guangzhou City, Guangdong Province Patentee after: Tianma Technology (Guangdong) Co.,Ltd. Address before: 101, No. 3, Wangbo 3rd Street South, Dongsha Village, Donghuan Street, Panyu District, Guangzhou City, Guangdong Province, 510000 (location: B301) (can be used as a workshop) Patentee before: GUANGZHOU YUESHENG ELECTRONIC TECHNOLOGY CO.,LTD. |
|
| CP03 | Change of name, title or address |