CN201440728U - Microphone - Google Patents
Microphone Download PDFInfo
- Publication number
- CN201440728U CN201440728U CN2009201948148U CN200920194814U CN201440728U CN 201440728 U CN201440728 U CN 201440728U CN 2009201948148 U CN2009201948148 U CN 2009201948148U CN 200920194814 U CN200920194814 U CN 200920194814U CN 201440728 U CN201440728 U CN 201440728U
- Authority
- CN
- China
- Prior art keywords
- chip
- switch
- circuit
- processing circuit
- audio frequency
- 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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- Circuit For Audible Band Transducer (AREA)
Abstract
The utility model relates to a microphone. The microphone is characterized in that the microphone has two working modes of sound volume adjusting and sound volume fixing, and the two working modes can be converted by a switching circuit. The switching circuit comprises a dual-gear waved switch and a chip with the function of an electronic switch; the fixed contact ends of the dual-gear waved switch are respectively connected with a power supply by resistors, and the movable contact ends are respectively connected with triggering pins of the two electronic switches at the inner part of the chip; one end of one electronic switch at the inner part of the chip is connected with an audio processing circuit by an adjusting circuit, and the other end is connected with a power amplification circuit; and the other electronic switch at the inner part of the chip is directly connected between the audio processing circuit and the power amplification circuit. As different requirements of indoor and outdoor environments for sound are taken into full consideration, the functions of the microphone can be exerted to the maximum degree; the microphone is flexible as well as convenient for use, and can effectively avoid squeaking.
Description
Technical field
The utility model relates to a kind of loudspeaker with automatic and manual double working modes.
Background technology
Loudspeaker and microphone are used, and play the effect of amplifying in meeting, sales promotion, propaganda or the like occasion.Because various occasions especially have bigger difference to the requirement difference of loudspeaker power when indoor and outdoors uses, therefore often need to regulate micropkonic power output.Yardstick is grasped bad then loudspeaker and will be produced sharp-pointed uttering long and high-pitched sounds during adjusting.
The utility model content
The problem that the utility model need solve provides optional, easy to operate, the adaptable loudspeaker of a kind of flexible working mode.
According to the above-mentioned problem that needs solution, the technical scheme that the utility model is taked is: a kind of loudspeaker is provided, comprises the audio frequency processing circuit and the power amplification circuit that connect in turn, described loudspeaker has volume adjustable operational modes and volume steady job pattern; Described volume adjustable operational modes and volume steady job pattern realize conversion by the switch switching circuit that connects with audio frequency processing circuit.
A kind of concrete scheme is: described switch switching circuit comprises folk art term waved switch K and has the chip U10 of electronic switching; Described folk art term waved switch K fixed contact 3,6 ends all connect the 5V power supply by resistance, and two electronic switches of A, B that moving contact 2,5 ends connect chip U10 inside respectively trigger pin; Electronic switch A one end of described chip U10 inside connects audio frequency processing circuit by regulating circuit, and the other end connects power amplification circuit; The electronic switch B of described chip U10 inside directly is connected between audio frequency processing circuit and the power amplification circuit.
Described regulating circuit comprises variable resistor R35, and R35 two stiff ends are connected between audio frequency processing circuit signal input part and the ground, and the adjustable end of R35 connects the electronic switch A of chip U10 inside by electric capacity.
But the utlity model has the fixing and two kinds of mode of operations of volume hand adjustment of volume, two kinds of patterns can be selected flexibly to use by change over switch.The volume fixed mode is adapted at indoor use, fully take into account the influence of indoor environmental condition to sound generating, only need during use mode conversion switch is placed this mode position, after the start energising, described loudspeaker promptly is operated under the best volume status, exempt to regulate, be difficult for uttering long and high-pitched sounds, very easy to use; The hand adjustment pattern then is adapted at outdoor application, and promptly volume can free adjustment, if outdoor a riot of sound, then can be adjusted to big volume status, if outdoor relatively quieter, then can be adjusted to general volume etc.; Outdoor environment is open, and sound is difficult for reflection, therefore can farthest bring into play described micropkonic limit power, covers the wider space that amplifies, and can not produce any uttering long and high-pitched sounds.
Description of drawings
Fig. 1 is described loudspeaker theory of constitution and operating state block diagram;
Fig. 2 is a switch switching circuit embodiment principle schematic.
Embodiment
For the ease of those skilled in the art's understanding, composition structure of the present utility model and operation principle are described in further detail below in conjunction with accompanying drawing:
As Fig. 1, loudspeaker described in the utility model comprises audio frequency processing circuit and power amplification circuit, and described switch switching circuit is connected with audio frequency processing circuit.Generally speaking, loudspeaker connects that the signal that microphone is picked up behind the microphone is decoded, filtering and preliminary amplify etc. amplify output by power amplification circuit after handling again.Described micropkonic two kinds of mode of operations are that the switch switching circuit that adopts folk art term waved switch and the chip with electronic switching to form realizes.
As Fig. 2 is the utility model one specific embodiment circuit theory diagrams.Described folk art term waved switch K fixed contact 3,6 ends all connect the 5V power supply by resistance, and two electronic switches of A, B that moving contact 2,5 ends connect chip U10 inside respectively trigger pin; Electronic switch A one end of described chip U10 inside connects audio frequency processing circuit by regulating circuit, and the other end connects power amplification circuit; The electronic switch B of described chip U10 inside directly is connected between audio frequency processing circuit and the power amplification circuit.Described regulating circuit comprises variable resistor R35, and R35 two stiff ends are connected between audio frequency processing circuit signal input part and the ground, and the adjustable end of R35 connects the electronic switch A of chip U10 inside by electric capacity.
Its operation principle is as follows: when setting folk art term toggle switch K toggles it to adjustable operational modes, K switch 2 pin, 1 pin join and 5 pin, 6 pin join, then the 5V power supply arrives the switch triggering pin 13 of electronic switch U10-A by 6,5 pin of resistance R 96 K switch, the conducting of U10-A internal switch, electronic switch U10-B did not have triggering signal and was in cut-off state this moment, regulate variable resistor R35, audio signal is through 3 pin and 2 pin of resistance R 34, R35, level power amplification circuit after capacitor C 59, electronic switch U10-A export to, and then level output amplitude size after changing again.
When the setting toggle switch toggles it to fixed mode, K switch 2 pin and 3 pin join, 5 pin and 4 pin join, end with the last U10-A of electronic switch in like manner, and the U10-B conducting, this moment, audio signal was exported to back level power amplification circuit by resistance R 34, R84, capacitor C 58, electronic switch U10-B, was output as fixing amplitude.
In order to reach the effect that better amplifies, described loudspeaker can adopt digital circuit technique, makes it have bigger power output, satisfies medium-and-large-sized classroom, exhibition, sales promotion, propaganda, guide, speech or the like the occasion demand that amplifies.
Described loudspeaker can also be provided with the external audio frequency input interface, the input of audio frequency such as MP3, DVD can be amplified, and music appreciating uses this loudspeaker as active audio amplifier.
Above embodiment only is the preferable implementation of the utility model, can not limit the utility model with this, under the utility model design prerequisite that do not come off, its any being equal to of doing is replaced and minor variations all belongs to protection range of the present utility model.
Claims (3)
1. a loudspeaker comprises the audio frequency processing circuit and the power amplification circuit that connect in turn, and it is characterized in that: described loudspeaker has volume adjustable operational modes and volume steady job pattern; Described volume adjustable operational modes and volume steady job pattern realize conversion by the switch switching circuit that connects with audio frequency processing circuit.
2. loudspeaker according to claim 1 is characterized in that: described switch switching circuit comprises folk art term waved switch K and has the chip U10 of electronic switching; Described folk art term waved switch K fixed contact 3,6 ends all connect the 5V power supply by resistance, and two electronic switches of A, B that moving contact 2,5 ends connect chip U10 inside respectively trigger pin; Electronic switch A one end of described chip U10 inside connects audio frequency processing circuit by regulating circuit, and the other end connects power amplification circuit; The electronic switch B of described chip U10 inside directly is connected between audio frequency processing circuit and the power amplification circuit.
3. loudspeaker according to claim 2, it is characterized in that: described regulating circuit comprises variable resistor R35, R35 two stiff ends are connected between audio frequency processing circuit signal input part and the ground, and the adjustable end of R35 connects the electronic switch A of chip U10 inside by electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201948148U CN201440728U (en) | 2009-09-14 | 2009-09-14 | Microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201948148U CN201440728U (en) | 2009-09-14 | 2009-09-14 | Microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201440728U true CN201440728U (en) | 2010-04-21 |
Family
ID=42545383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201948148U Expired - Fee Related CN201440728U (en) | 2009-09-14 | 2009-09-14 | Microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201440728U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108781328A (en) * | 2016-03-17 | 2018-11-09 | 雅马哈株式会社 | Stereo set, latch-release method, program and medium |
-
2009
- 2009-09-14 CN CN2009201948148U patent/CN201440728U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108781328A (en) * | 2016-03-17 | 2018-11-09 | 雅马哈株式会社 | Stereo set, latch-release method, program and medium |
| CN108781328B (en) * | 2016-03-17 | 2020-10-16 | 雅马哈株式会社 | Acoustic device, lock release method, and medium |
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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: 20100421 Termination date: 20140914 |
|
| EXPY | Termination of patent right or utility model |