CN204090119U - The special acoustics of teaching multimedia - Google Patents
The special acoustics of teaching multimedia Download PDFInfo
- Publication number
- CN204090119U CN204090119U CN201420628875.1U CN201420628875U CN204090119U CN 204090119 U CN204090119 U CN 204090119U CN 201420628875 U CN201420628875 U CN 201420628875U CN 204090119 U CN204090119 U CN 204090119U
- Authority
- CN
- China
- Prior art keywords
- square groove
- loud speaker
- power amplifier
- acoustics
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a kind of acoustics, the special acoustics of a kind of teaching multimedia specifically, what solve be the sound equipment part of current teaching multimedia is combined by multiple equipment, thus bring cost high, take up room large, be not easy to the problem of keeping in repair.This acoustics is made up of square groove, voltage-stabilized source circuit board, power amplifier plate, loud speaker, volume adjustment knob, power line, tone frequency channel wire, microphone, audio jack and attaching plug, voltage-stabilized source circuit board, power amplifier plate, loud speaker are placed in the bottom land of square groove respectively, the cone mouth of loud speaker is concordant with the notch of square groove, the notch of square groove has the outer perpendicular with cell wall, and there is screwed hole the corner of outer.
Description
Technical field
The utility model relates to a kind of acoustics, specifically a kind of acoustics for teaching multimedia.
Background technology
The sound equipment processing section of current teaching multimedia is combined by the equipment that power amplifier, audio amplifier, microphone three kinds are discrete, not only cost high and also take up room large, be not easy to install and maintenance, in this case, the special acoustics of teaching multimedia designing and developing integration is very necessary.
Summary of the invention
What the utility model solved is the sound equipment part of current teaching multimedia is combined by multiple equipment, thus bring cost high, take up room large, be not easy to the problem of keeping in repair, provide a kind of teaching multimedia of integration special acoustics.
This acoustics is made up of square groove, voltage-stabilized source circuit board, power amplifier plate, loud speaker, volume adjustment knob, power line, tone frequency channel wire, microphone, audio jack and attaching plug, voltage-stabilized source circuit board, power amplifier plate, loud speaker are placed in the bottom land of square groove respectively, the cone mouth of loud speaker is concordant with the notch of square groove, the notch of square groove has the outer perpendicular with cell wall, and there is screwed hole the corner of outer; Power line is through the cell wall of square groove, and an end is received on voltage-stabilized source circuit board, and the other end is connected with attaching plug; Power amplifier plate has two audio signal input ends, and two tone frequency channel wires pass the cell wall of square groove, and be connected with two audio signal input ends of power amplifier plate respectively, the other end of two tone frequency channel wires is connected with microphone and audio jack respectively; The back side of volume adjustment knob at the bottom of square groove, is connected with power amplifier plate by the wire through bottom land.The principle of voltage-stabilized power supply circuit and power amplifier and formation, annexation between voltage-stabilized power supply circuit, power amplifier, loud speaker, and the connection of volume adjustment knob and power amplifier, the connection of voltage-stabilized power supply circuit and power line, power amplifier and two tone frequency channel wires connection belong to prior art, do not repeat here.
This acoustics can amplify two-way audio input signal, and a road is the audio signal from microphone, and another road is the audio signal from computer, and the audio signal from computer inputs to power amplifier by audio jack and tone frequency channel wire.The basic functional principle of this acoustics is: power amplifier amplifies above-mentioned two-way audio signal, and then the audio signal through amplifying is flowed to loud speaker and carry out sounding, sound size is mediated by volume adjustment knob; 220 volts of ac process are become direct current of voltage regulation, for power amplifier provides power supply by voltage-stabilized power supply circuit.
This acoustics lead screw to be fixed on by the screwed hole on notch outer before the casing of teaching multimedia, and teaching multimedia casing has the hole onesize with cone mouth in the position of corresponding diffuser.
The utility model structure is simple, easy to use, cheap for manufacturing cost, is easy to promote.
Accompanying drawing explanation
The special acoustics front view of Fig. 1 teaching multimedia; Fig. 2 is the special acoustics rearview of teaching multimedia; Fig. 3 is the special acoustics right view of teaching multimedia.
Embodiment
As shown in Figure 1, Figure 2, Figure 3 shows, voltage-stabilized source circuit board 4, power amplifier plate 6, loud speaker 5 are placed in the bottom land of square groove 1 respectively, the cone mouth of loud speaker 5 has Chain Link Fence, the cone mouth of loud speaker 5 is concordant with the notch of square groove 1, the notch of square groove 1 has the outer 2 perpendicular with cell wall, and there is screwed hole 3 corner of outer 2; Power line 7 is through the cell wall of square groove 1, and an end is received on voltage-stabilized source circuit board 4, and the other end is connected with attaching plug 11; Power amplifier plate 6 has two audio signal input ends (not shown in FIG.), article two, tone frequency channel wire 8,9 is through the cell wall of square groove 1, be connected with two audio signal input ends of power amplifier plate 6 respectively, the other end of two tone frequency channel wires 8,9 is connected with microphone 12 and audio jack 13 respectively; Have volume adjustment knob 10 at the back side at square groove 1 end, volume adjustment knob 10 is connected (wire does not draw) with power amplifier plate 6 by the wire through bottom land.The principle of voltage-stabilized power supply circuit and power amplifier and formation, annexation between voltage-stabilized power supply circuit, power amplifier, loud speaker, and the connection of volume adjustment knob and power amplifier, the connection of voltage-stabilized power supply circuit and power line, power amplifier and two tone frequency channel wires connection belong to prior art, do not repeat here.
Claims (1)
1. the special acoustics of teaching multimedia, be made up of square groove, voltage-stabilized source circuit board, power amplifier plate, loud speaker, volume adjustment knob, power line, tone frequency channel wire, microphone, audio jack and attaching plug, it is characterized in that voltage-stabilized source circuit board, power amplifier plate, loud speaker are placed in the bottom land of square groove respectively, the cone mouth of loud speaker is concordant with the notch of square groove, the notch of square groove has the outer perpendicular with cell wall, and there is screwed hole the corner of outer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420628875.1U CN204090119U (en) | 2014-10-28 | 2014-10-28 | The special acoustics of teaching multimedia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420628875.1U CN204090119U (en) | 2014-10-28 | 2014-10-28 | The special acoustics of teaching multimedia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204090119U true CN204090119U (en) | 2015-01-07 |
Family
ID=52182785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420628875.1U Expired - Fee Related CN204090119U (en) | 2014-10-28 | 2014-10-28 | The special acoustics of teaching multimedia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204090119U (en) |
-
2014
- 2014-10-28 CN CN201420628875.1U patent/CN204090119U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20151028 |
|
| EXPY | Termination of patent right or utility model |