CN201138468Y - Keyboard of loudspeaker box with USB sound card - Google Patents
Keyboard of loudspeaker box with USB sound card Download PDFInfo
- Publication number
- CN201138468Y CN201138468Y CNU2007201999564U CN200720199956U CN201138468Y CN 201138468 Y CN201138468 Y CN 201138468Y CN U2007201999564 U CNU2007201999564 U CN U2007201999564U CN 200720199956 U CN200720199956 U CN 200720199956U CN 201138468 Y CN201138468 Y CN 201138468Y
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- China
- Prior art keywords
- keyboard
- usb
- computor
- audio
- sound card
- 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 USB sound card and sound box keyboard, which consists of a USB computer keyboard, a USB hub, a USB sound card, an audio power amplification circuit, a speaker with left and right sound channels, etc.; the keyboard can play computer sound without an internal sound card, a computer sound box, a power plug and an audio signal lead wire of a computer host; the computer keyboard also has a voice input function; the audio data enters into the USB sound card in digital form, and the digital audio signals can be reduced into analog audio signals in the computer keyboard, and then amplified by audio power and output to earphone jacks and the speaker with the left and the right sound channels on the computer keyboard; o the audio signals can totally avoid the internal inference of the PC; the analog audio signals with higher quality can be output from the earphone jacks of the computer keyboard.
Description
One, affiliated technical field
The utility model relates to the computing machine peripheral equipment, especially need not sound card, the tone frequency channel wire of main frame and does not need to add power lead in addition, can play-over out the computor-keyboard of sound.
Two, background technology
At present, use the people of computer more and more, the computer instrument that is absolutely necessary, the people high to tonequality thinks that the sound card in the host computer produces interference in PC, makes the audio producing noise of sound card output, particularly music stop quiet the time, noise obviously exists.And have most people seldom to open computer sound box, Shang Ban staff particularly, but need to open computer sound in some cases again and insert microphone; As seen computer sound and microphone are again prerequisite.Seldom use the staff of computer sound box, a lot of again for the audio amplifier line, L channel connecting line, R channel connecting line, subwoofer line, power lead, sound signal incoming line are arranged, add three audio amplifiers, so multi-thread not attractive in appearance really, also take very much desk-top space, often these audio amplifiers are thrown away the corner and do not connect, also do not use; Consider that microphone cord is again in the computer housing back, computer microphone input port generally is to put by wall, plug pretty troublesome, concerning the computer user who less payes attention to sound, want audio amplifier and microphone would rather not, still, in the time of need using computer sound and voice call, do not have audio amplifier and microphone not all right again, want audio amplifier on earth, bring the selection of headache for the computer people who does not often use audio amplifier; To requiring the high people of computer sound card output audio signal quality, also have many sorry.
Three, summary of the invention
In order to overcome shortcoming and the PC problem that generation is disturbed to sound card how the computer sound box line takies desktop again, the utility model provides a kind of keyboard of USB sound card audio amplifier, it can not only play computer sound, and the support that does not need to insert other power lead, audio frequency incoming line, microphone incoming line, the keyboard that does not also need the built-in sound card of host computer just can play sound.
The technical scheme that its technical matters that solves the utility model adopts is: increase usb hub in the USB of prior art keyboard, the Yang Shengqi of left and right acoustic channels is installed on the computor-keyboard housing, in keyboard surface audio output jack and microphone input jack are arranged, keyboard is made up of USB sound card circuit and analogue audio frequency amplifying circuit, function by usb hub, many groups USB interface with output, offer USB keyboard and USB sound card circuit respectively, by the D/A conversion chip in the USB sound card circuit, convert digital signal to simulated audio signal output, pass through audio power amplifier circuit again, after the power amplification, be transported in the left and right acoustic channels Yang Sheng device on the computor-keyboard; The hub of keyboard the unnecessary USB interface that goes out can be installed on the avris of USB computor-keyboard, the USB socket quantity on the computor-keyboard can design according to actual needs, can increase and can subtract.On the surface of computor-keyboard audio output jack and microphone input jack are arranged, jack can be arranged on the computor-keyboard avris or the front, when needs are listened hi-fi music, high-fidelity headphone can be inserted the audio output jack on the computor-keyboard, listen to hi-fi music.Microphone input jack on the keyboard can be realized the effect of phonetic entry.There are audio-frequency electric source switch and audio-frequency electric source switch pilot lamp in the computor-keyboard surface, when not needing computer to sound, except controlling the volume with computer software, also the audio-frequency electric source switch on the computor-keyboard can be closed, also closed simultaneously the audio frequency power light, the positive pole of USB plug line and negative pole offer audio power amplifier circuit, usb hub, USB computor-keyboard as unique working power of the present utility model.Loudspeaker on the computor-keyboard can be installed in the keyboard reverse side, and also can be installed in keyboard positive or be installed in the cavity of computor-keyboard projection, realized that the use keyboard can play computer sound purpose.
The beneficial effects of the utility model are under the situation that does not increase the peripheral any connecting line of USB keyboard, to realize that the USB computer keyboard has the function of computer sound box and microphone input.
Four, description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the utility model mass action figure.
Fig. 2 is a fundamental diagram of the present utility model.
Fig. 3 is another embodiment schematic diagram of the utility model.
1.USB plug among the figure, 2.USB socket, 3.USB hub, 4.USB computor-keyboard circuit, 5. microphone jack, 6. earphone jack, 7. audio frequency power light, 8. L channel Yang Sheng device, 9. R channel Yang Sheng device, 10. audio power amplifier circuit, 11. audio-frequency electric source switches, 12.USB the sound card circuit, 13. keyboard cases.
Five, embodiment
In the drawings, after USB plug (1) is inserted the USB socket of computing machine, obtain computing machine digital signal and+the 5V power supply, effect by usb hub (3), usb data is told many group USB output ports, USB computor-keyboard circuit (4) and USB sound card circuit (12) are provided respectively, and additional several groups of USB port are exported as the USB socket on the keyboard (2).When the USB digital signal is transported to USB sound card circuit (12), convert digital signal to simulated audio signal, audio analog signals is transported to the amplification of audio power amplifier circuit (10) realization audio power through R3 and R4, sound signal after the amplification, move towards earphone jack (6) by capacitor C 3 and C4, go further and sound to L channel Yang Sheng device (8) and R channel Yang Sheng device (9).The employed working power of audio power amplifier circuit (10), by the computing machine USB port+the 5V power supply provides, when not needing computer to play sound, except controlling the volume with computer software, can also fast close audio-frequency electric source switch (11), cut off the power supply of audio power amplifier circuit (10), also cut off audio frequency power light (7) simultaneously.When needing microphone speech recording, microphone is inserted microphone jack (5), microphone signal is coupled to the microphone signal input port of USB sound card circuit (12) by C5, convert simulated audio signal to digital signal that computing machine needs by USB sound card circuit (12), be sent in the computing machine by the usb data line, realize speech voice input function.When high-fidelity headphone being inserted earphone jack (6), the automatic cutout of jack inner contact, cut off the L channel Yang Sheng device (8) on the computor-keyboard (13) and the source of sound of R channel Yang Sheng device (9), the sound signal turn of tidal stream is to high-fidelity headphone, through resistance R 1 up to ground connection.
In embodiment shown in Figure 3, when being integrated with the audio power enlarging function in the USB sound card circuit (12), can save audio power amplifier circuit (10), also save audio-frequency electric source switch (11) and audio frequency power light (7) simultaneously; Be integrated with the output terminal of the USB sound card circuit (12) of audio power amplification, directly lead to capacitor C 3 and C4 and move towards earphone jack (6), go further and sound, this solution integration degree height to L channel Yang Sheng device (8) and R channel Yang Sheng device (9), circuit is oversimplified, and cost is lower.
Claims (6)
1. the keyboard of a USB sound card audio amplifier, it is by USB computor-keyboard, USB connecting line, USB plug, USB socket, usb hub, it is characterized in that: the Yang Shengqi that left and right acoustic channels is installed on the computor-keyboard housing, on the surface of computor-keyboard audio output jack and microphone input jack are arranged, keyboard is made up of usb hub and USB sound card circuit and analogue audio frequency amplifying circuit, and positive pole by the computer USB plug cord and negative pole are as the working power of audio amplifier circuit.
2. the keyboard of USB sound card audio amplifier according to claim 1 is characterized in that: the positive pole of USB plug line and negative pole offer audio power amplifier circuit, usb hub, USB computor-keyboard as unique working power of the present utility model.
3. the keyboard of USB sound card audio amplifier according to claim 1 is characterized in that: the loudspeaker on the computor-keyboard are installed in the keyboard reverse side or are installed in keyboard positive or be installed in the cavity of computor-keyboard projection.
4. the keyboard of USB sound card audio amplifier according to claim 1 is characterized in that: there are audio-frequency electric source switch and audio-frequency electric source switch pilot lamp in the computor-keyboard surface.
5. the keyboard of USB sound card audio amplifier according to claim 1 is characterized in that: on the surface of computor-keyboard audio output jack and microphone input jack are arranged, jack can be arranged on the computor-keyboard avris or the front.
6. the keyboard of USB sound card audio amplifier according to claim 1 is characterized in that: keyboard or computor-keyboard are exactly the USB computor-keyboard that adopts USB interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201999564U CN201138468Y (en) | 2007-12-06 | 2007-12-06 | Keyboard of loudspeaker box with USB sound card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201999564U CN201138468Y (en) | 2007-12-06 | 2007-12-06 | Keyboard of loudspeaker box with USB sound card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201138468Y true CN201138468Y (en) | 2008-10-22 |
Family
ID=40039151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201999564U Expired - Fee Related CN201138468Y (en) | 2007-12-06 | 2007-12-06 | Keyboard of loudspeaker box with USB sound card |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201138468Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103970282A (en) * | 2014-06-04 | 2014-08-06 | 祁欣 | Sounding keyboard |
| CN105511573A (en) * | 2016-01-15 | 2016-04-20 | 同方计算机有限公司 | Loudspeaker power amplifier small board with power supplied through USB interface |
| CN112511954A (en) * | 2020-12-08 | 2021-03-16 | 南昌勤胜电子科技有限公司 | Stereo assembly and terminal equipment |
-
2007
- 2007-12-06 CN CNU2007201999564U patent/CN201138468Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103970282A (en) * | 2014-06-04 | 2014-08-06 | 祁欣 | Sounding keyboard |
| CN105511573A (en) * | 2016-01-15 | 2016-04-20 | 同方计算机有限公司 | Loudspeaker power amplifier small board with power supplied through USB interface |
| CN112511954A (en) * | 2020-12-08 | 2021-03-16 | 南昌勤胜电子科技有限公司 | Stereo assembly and terminal equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081022 Termination date: 20100106 |