CN203301714U - Mutual inductance speaker - Google Patents
Mutual inductance speaker Download PDFInfo
- Publication number
- CN203301714U CN203301714U CN2013203564365U CN201320356436U CN203301714U CN 203301714 U CN203301714 U CN 203301714U CN 2013203564365 U CN2013203564365 U CN 2013203564365U CN 201320356436 U CN201320356436 U CN 201320356436U CN 203301714 U CN203301714 U CN 203301714U
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- CN
- China
- Prior art keywords
- mutual inductance
- inductance transformer
- audio frequency
- transformer
- inductance
- 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 discloses a mutual inductance speaker, comprising a speaker housing. A first mutual inductance transformer, a second mutual inductance transformer, a signal amplification circuit, an audio frequency power amplifier chip and a horn are connected in sequence and arranged in the speaker. The first mutual inductance transformer is adjacent to the inner side surface of the speaker housing to receive magnetic field change signals generated from loudspeaker vibration when external equipment plays, and the signals pass through the second mutual inductance transformer, the signal amplification circuit and the audio frequency power amplifier chip, and are finally restored to audio signals to be played by the horn. The beneficial effects are provided as follows: the electromagnetic induction technology is employed to realize wireless connection, design is novel, the different interface specification problems of digital audio frequency equipment is solved, pairing arrangement is unnecessary, costs are low, and various audio frequency effects required by a user are available.
Description
Technical field
The utility model relates to field of audio play, is specially a kind of mutual inductance audio amplifier.
Background technology
The speaker sound of existing digital audio equipment (mobile phone, MP4, panel computer etc.) peripheral hardware is too small, and tonequality is poor, can't meet the user to acoustic requirement.Existing solution has two kinds:
1, use connecting line that digital audio equipment is connected with audio amplifier;
2, use Bluetooth technology to connect digital audio frequency apparatus and audio amplifier.
Use connecting line with the scheme shortcoming that digital audio equipment is connected with audio amplifier to be: a, to need the data wire connection; The output interface of b, mobile phone unified standard useless.Therefore cause the inconvenience of use;
The scheme shortcoming of using Bluetooth technology to connect digital audio frequency apparatus and audio amplifier is: a, audio amplifier cost are higher; B, the digital audio equipment with Bluetooth function can not connect audio amplifier; C, there is the digital audio equipment of Bluetooth function need to match setting.
The utility model content
For the problems referred to above, the utility model aims to provide a kind of mutual inductance audio amplifier, with a kind of new mode, realizes wireless connections.
For realizing this technical purpose, scheme of the present utility model is: a kind of mutual inductance audio amplifier, comprise voice box casing, and be provided with the first inductance transformer, the second inductance transformer, signal amplification circuit, audio frequency power amplifier chip and the loudspeaker that connect successively in voice box casing; The first inductance transformer is pressed close to the voice box casing inner surface, the magnetic field variation signal that while receiving the external equipment broadcast, its loudspeaker vibration produces, and this signal is passed through the second inductance transformer, signal amplification circuit, audio frequency power amplifier chip, finally be reduced to audio signal and emit by loudspeaker.
Preferably, the distance between the first inductance transformer and voice box casing inner surface is less than 5mm.
Preferably, also be provided with screen between the first inductance transformer and the second inductance transformer.
The beneficial effects of the utility model are, adopt the electromagnetic induction technology to realize wireless connections, modern design, and need not to worry the distinct interface specification problem of digital audio equipment, need not pairing setting, cost is low, can realize the needed various audio frequency effects of user.
Description of drawings
Fig. 1 is the electrical block diagram of the utility model audio amplifier.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further details.
As shown in Figure 1, the mutual inductance audio amplifier, comprise voice box casing, is provided with the first inductance transformer 1, the second inductance transformer 2, signal amplification circuit 3, audio frequency power amplifier chip 4 and the loudspeaker 5 that connect successively in voice box casing; The first inductance transformer is pressed close to the voice box casing inner surface, distance is in 5mm, the magnetic field variation signal that while receiving the external equipment broadcast, its loudspeaker vibration produces, and this signal is passed through the second inductance transformer, signal amplification circuit, audio frequency power amplifier chip, finally be reduced to audio signal and emit by loudspeaker.
For fear of the mutual interference of two transformer bay phases, but between the first inductance transformer and the second inductance transformer provided with shielding layer also.
For the equipment with music playback function such as mobile phone, while putting outside using self loudspeaker, during the coil of the current signal of variation by loudspeaker, the magnetic field that changes around loudspeaker.The peripheral hardwares such as mobile phone are put into above audio amplifier, the loudspeaker of peripheral hardware are positioned at the top of inductance transformer, transformer is passed through in the magnetic field that produces around loudspeaker, the sensor current signal that changes in transformer, sensor current signal is after amplifying circuit amplifies, input signal as audio signal is input to the audio frequency power amplifier chip, by left and right acoustic channels, sounds.
The above; it is only preferred embodiment of the present utility model;, not in order to limit the utility model, any trickle modification that every foundation technical spirit of the present utility model is done above embodiment, be equal to and replace and improve, within all should being included in the protection range of technical solutions of the utility model.
Claims (3)
1. a mutual inductance audio amplifier, comprise voice box casing, it is characterized in that: be provided with the first inductance transformer, the second inductance transformer, signal amplification circuit, audio frequency power amplifier chip and the loudspeaker that connect successively in voice box casing; The first inductance transformer is pressed close to the voice box casing inner surface, the magnetic field variation signal that while receiving the external equipment broadcast, its loudspeaker vibration produces, and this signal is passed through the second inductance transformer, signal amplification circuit, audio frequency power amplifier chip, finally be reduced to audio signal and emit by loudspeaker.
2. mutual inductance audio amplifier according to claim 1, it is characterized in that: the distance between the first inductance transformer and voice box casing inner surface is less than 5mm.
3. mutual inductance audio amplifier according to claim 1, is characterized in that: also be provided with screen between the first inductance transformer and the second inductance transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203564365U CN203301714U (en) | 2013-06-20 | 2013-06-20 | Mutual inductance speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203564365U CN203301714U (en) | 2013-06-20 | 2013-06-20 | Mutual inductance speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203301714U true CN203301714U (en) | 2013-11-20 |
Family
ID=49577690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203564365U Expired - Fee Related CN203301714U (en) | 2013-06-20 | 2013-06-20 | Mutual inductance speaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203301714U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104581537A (en) * | 2015-01-27 | 2015-04-29 | 李德生 | EE-shaped no-connection audio transmission middle end |
-
2013
- 2013-06-20 CN CN2013203564365U patent/CN203301714U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104581537A (en) * | 2015-01-27 | 2015-04-29 | 李德生 | EE-shaped no-connection audio transmission middle end |
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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: 20131120 Termination date: 20150620 |
|
| EXPY | Termination of patent right or utility model |