CN208241860U - Omnidirectional microphone - Google Patents
Omnidirectional microphone Download PDFInfo
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- CN208241860U CN208241860U CN201820869666.4U CN201820869666U CN208241860U CN 208241860 U CN208241860 U CN 208241860U CN 201820869666 U CN201820869666 U CN 201820869666U CN 208241860 U CN208241860 U CN 208241860U
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- microphone
- resistance
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- capacitor
- terminal box
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Abstract
The utility model discloses a kind of omnidirectional microphones, including hemizonid, terminal box, movable axis, send words line, microphone, connecting line, plug, insulation sleeve, metal mesh shield layer, conducting wire, shielding case and main circuit board, one end of hemizonid is arranged in terminal box, movable axis is arranged in terminal box, movable axis is connect with one end of words line is sent, the other end of words line is sent to connect with microphone, insulation is set on the outer layer for sending words line, the inside of insulation sleeve is arranged in metal mesh shield layer, the inside for sending words line is arranged in conducting wire, the outside of terminal box is arranged in shielding case, the inside of terminal box is arranged in main circuit board, main circuit board is equipped with microphone circuit；Microphone circuit includes battery, first resistor, first capacitor, the first triode, second resistance, the second capacitor, third potentiometer, first diode, third capacitor and loudspeaker.The utility model circuit structure is relatively simple, cost is relatively low, the safety and reliability of circuit is higher.
Description
Technical field
The utility model relates to microphone field, in particular to a kind of omnidirectional microphone.
Background technique
Omnidirectional microphone is a portable conference telephone product, can not only be carried out on the internet by the interface of computer
The network telephone conference of high-quality；And it can a kind of loudspeaker and microphone by earphone interface as mobile phone
Hands-free talking device, carry out the mobile phone meeting of high-quality.Its moulding is classical generous easy to carry.Microphone pickup
Direction can carry out selection setting according to conference scenario, be suitble to use in the places such as meeting room and office.In traditional technology
The component that the circuit part of omnidirectional microphone uses is more, and wiring is complicated, causes circuit structure more complicated, hardware cost compared with
It is high.In addition, since the circuit part of the omnidirectional microphone in traditional technology lacks corresponding circuit protection function, such as: lack
Overcurrent protection function causes the safety and reliability of circuit not high.
Utility model content
The technical problem to be solved by the present invention is in view of the above drawbacks of the prior art, provide a kind of circuit knot
Structure is relatively simple, cost is relatively low, the higher omnidirectional microphone of the safety and reliability of circuit.
The technical scheme adopted by the utility model to solve the technical problem is as follows: constructing a kind of omnidirectional microphone, including half
Ring body, terminal box, movable axis, send words line, microphone, connecting line, plug, insulation sleeve, metal mesh shield layer, conducting wire, shielding case and
One end of the hemizonid is arranged in main circuit board, the terminal box, and the movable axis is arranged in the terminal box, the work
Moving axis is connect with described one end for sending words line, and the other end for sending words line is connect with the microphone, and the insulation is set on
The inside of the insulation sleeve is arranged in the outer layer for sending words line, the metal mesh shield layer, and the conducting wire setting is sent described
The inside of line is talked about, the outside of the terminal box is arranged in the shielding case, and the main circuit board is arranged in the terminal box
Portion, the terminal box are connect with one end of the connecting line, and the other end of the connecting line is connect with the plug, the main electricity
Road plate is equipped with microphone circuit；
The microphone circuit includes battery, first resistor, first capacitor, the first triode, second resistance, the second electricity
Appearance, third potentiometer, first diode, third capacitor and loudspeaker, the battery anode respectively with the first resistor
One end is connected with one end of second resistance, the other end of the first resistor respectively with one end of the microphone and first capacitor
One end connection, the other end of the first capacitor connect with the base stage of first triode, the other end of the microphone and the
The emitter of one triode is connect with the cathode of the battery, the other end of the second resistance respectively with the one or three pole
The connection of one end of the collector of pipe and the second capacitor, a fixation of the other end of second capacitor and the third potentiometer
End connection, another fixing end of the third potentiometer are connect with the cathode of the battery, the sliding of the third potentiometer
End is connect with the anode of the first diode, the cathode of the first diode respectively with one end of the third capacitor and raise
One end of sound device connects, and the other end of the third capacitor and the other end of loudspeaker are connect with the cathode of the battery, institute
State the model S-202T of first diode.
In omnidirectional microphone described in the utility model, the microphone circuit further includes the 4th resistance, and the described 4th
One end of resistance is connect with the cathode of the first diode, and the other end of the 4th resistance and one end of the loudspeaker connect
It connects, the resistance value of the 4th resistance is 47k Ω.
In omnidirectional microphone described in the utility model, the microphone circuit further includes the 5th resistance, and the described 5th
One end of resistance is connect with the emitter of first triode, and the other end of the 5th resistance and the cathode of the battery connect
It connects, the resistance value of the 5th resistance is 55k Ω.
In omnidirectional microphone described in the utility model, first triode is NPN type triode.
The omnidirectional microphone for implementing the utility model has the advantages that due to being equipped with hemizonid, terminal box, work
Moving axis send words line, microphone, connecting line, plug, insulation sleeve, metal mesh shield layer, conducting wire, shielding case and main circuit board, main circuit
Plate is equipped with microphone circuit；Microphone circuit include battery, first resistor, first capacitor, the first triode, second resistance,
Second capacitor, third potentiometer, first diode, third capacitor and loudspeaker, the microphone circuit is relative in traditional technology
Omnidirectional microphone circuit part, the component used is less, hardware cost can be reduced in this way, in addition, the one or two pole
Pipe is for carrying out current-limiting protection, therefore circuit structure is relatively simple, cost is relatively low, the safety and reliability of circuit is higher.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram in the utility model omnidirectional microphone one embodiment；
Fig. 2 is a partial structural diagram of omnidirectional microphone in the embodiment；
Fig. 3 is another partial structural diagram of omnidirectional microphone in the embodiment；
Fig. 4 is the circuit diagram of microphone circuit in the embodiment.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
In the utility model omnidirectional microphone embodiment, the structural schematic diagram of the omnidirectional microphone is as shown in Figure 1.Fig. 2
For a partial structural diagram of omnidirectional microphone in the present embodiment；Fig. 3 be the present embodiment in omnidirectional microphone another
Partial structural diagram.Such as Fig. 1 to Fig. 3, which includes hemizonid 1, terminal box 2, movable axis 3, send words line 4, miaow
First 5, connecting line 6, plug 7, insulation sleeve 8, metal mesh shield layer 9, conducting wire 10, shielding case 11 and main circuit board 12, wherein wiring
One end of hemizonid 1 is arranged in box 2, and movable axis 3 is arranged in terminal box 2, and movable axis 3 is connect with one end of words line 4 is sent, and send words
The other end of line 4 is connect with microphone 5, and the outer layer for sending words line 4 is arranged in insulation sleeve 8, and metal mesh shield layer 9 is arranged in insulation sleeve 8
Inside, gap caused by metal mesh shield layer 9 may make that high-frequency signal is freely in or out, so can effectively shield dry
It disturbs.
The inside for sending words line 4 is arranged in conducting wire 10, and the outside of terminal box 2 is arranged in shielding case 11, and main circuit board 12 is arranged
In the inside of terminal box 2, terminal box 2 is connect with one end of connecting line 6, and the other end of connecting line 6 is connect with plug 7, convenient for connecting
Wireless device is connect, main circuit board 12 is equipped with microphone circuit.
When needing with the omnidirectional microphone, hemizonid 1 is fixed on head, adjusts microphone 5 by adjusting movable axis 3
Position, be located at microphone 5 by the mouth of user, user converts telecommunications for voice signal by microphone 5 after making a sound
Number, on the main circuit board 12 come into terminal box 2 by sending the conducting wire 10 in words line 4, nothing is passed to after being amplified by amplifying circuit
In line equipment, metal mesh shield layer 9 and shielding case 11 can be former using reflection, absorption and skin effect of the metal to electromagnetic wave
Reason effectively prevent external electromagnetic interference to enter and send in words line 4 and terminal box 2, improves the fidelity of audio.
Fig. 4 is the circuit diagram of microphone circuit in the present embodiment, in Fig. 4, the microphone circuit include battery BAT,
First resistor R1, first capacitor C1, the first triode Q1, second resistance R2, the second capacitor C2, third potentiometer RP3, the one or two
Pole pipe D1, third capacitor C3 and loudspeaker, wherein battery BAT anode respectively with one end of first resistor R1 and second resistance
One end of R2 connects, and the other end of first resistor R1 is connect with one end of one end of microphone 5 and first capacitor C1 respectively, the first electricity
Hold C1 the other end connect with the base stage of the first triode Q1, the emitter of the other end of microphone 5 and the first triode Q1 with
The cathode of battery BAT connects, the other end of second resistance R2 respectively with the collector of the first triode Q1 and the second capacitor C2
One end connection, the other end of the second capacitor C2 are connect with a fixing end of third potentiometer RP3, and third potentiometer RP3's is another
One fixing end is connect with the cathode of battery BAT, and the sliding end of third potentiometer RP3 is connect with the anode of first diode D1,
The cathode of first diode D1 is connect with one end of one end of third capacitor C3 and loudspeaker respectively, the other end of third capacitor C3
It is connect with the cathode of battery BAT with the other end of loudspeaker.
Circuit part of the microphone circuit relative to the omnidirectional microphone in traditional technology, the component used compared with
Few, circuit structure is relatively simple, can reduce hardware cost in this way.In addition, first diode D1 be Current Limiting Diodes, for pair
Branch where the sliding end of third potentiometer RP3 carries out current-limiting protection, therefore the safety and reliability of circuit is higher.It is worth
One is mentioned that, in the present embodiment, the model S-202T of first diode D1, certainly, and in practical applications, first diode D1
Also it can choose the diode that other models have similar functions.
For first resistor R1 as biasing resistor, the resistance value of first resistor R1 is smaller, and the sensitivity of microphone 5 is higher.By second
The size of resistance R2 determines the amplification factor of the first triode Q1.The small signal of microphone 5 is by first capacitor C1 to the one or three pole
The base stage of pipe Q1；The second capacitor C2 is passed through in amplified signal output, and crosses third potentiometer RP3 output signal.Pass through third electricity
The sound that whistles can be effectively eliminated by holding C3.
It is noted that the first triode Q1 is NPN type triode in the present embodiment, certainly, in practical applications,
First triode Q1 may be PNP type triode, but at this moment the structure of circuit also will accordingly change.
In the present embodiment, which further includes the 4th resistance R4, one end of the 4th resistance R4 and first diode
The cathode of D1 connects, and the other end of the 4th resistance R4 and one end of loudspeaker connect.4th resistance R4 be current-limiting resistance, for into
Row current-limiting protection, to further enhance the safety and reliability of circuit, it is worth mentioning at this point that, in the present embodiment, the 4th resistance
The resistance value of R4 is 47k Ω, and certainly, in practical applications, the resistance value of the 4th resistance R4 can be adjusted accordingly as the case may be
It is whole.
In the present embodiment, which further includes the 5th resistance R5, one end of the 5th resistance R5 and the first triode
The emitter of Q1 connects, and the other end of the 5th resistance R5 is connect with the cathode of battery BAT.5th resistance R5 is current-limiting resistance, is used
Current-limiting protection is carried out in the emitter current to the first triode Q1, further to enhance the safety and reliability of circuit.
It is noted that the resistance value of the 5th resistance R5 is 55k Ω in the present embodiment, certainly, in practical applications, the 5th resistance R5
Resistance value can adjust accordingly as the case may be.
In short, in the present embodiment, circuit part of the microphone circuit relative to the omnidirectional microphone in traditional technology,
The component used is less, and circuit structure is relatively simple, can reduce hardware cost in this way.In addition, being set in the microphone circuit
Current limiting diode, therefore the safety and reliability of circuit is higher.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (4)
1. a kind of omnidirectional microphone, which is characterized in that including hemizonid, terminal box, movable axis, send words line, microphone, connecting line,
The one of the hemizonid is arranged in plug, insulation sleeve, metal mesh shield layer, conducting wire, shielding case and main circuit board, the terminal box
End, the movable axis are arranged in the terminal box, and the movable axis is connect with described one end for sending words line, and described send talks about line
The other end is connect with the microphone, and the insulation is set on the outer layer for sending words line, and the metal mesh shield layer setting exists
The inside for sending words line is arranged in the inside of the insulation sleeve, the conducting wire, and the terminal box is arranged in the shielding case
The inside of the terminal box is arranged in outside, the main circuit board, and the terminal box is connect with one end of the connecting line, described
The other end of connecting line is connect with the plug, and the main circuit board is equipped with microphone circuit；
The microphone circuit includes battery, first resistor, first capacitor, the first triode, second resistance, the second capacitor,
Three potentiometers, first diode, third capacitor and loudspeaker, the battery anode respectively with one end of the first resistor and
One end of second resistance connects, and the other end of the first resistor connects with one end of the microphone and one end of first capacitor respectively
It connects, the other end of the first capacitor is connect with the base stage of first triode, the other end of the microphone and the one or three pole
The emitter of pipe is connect with the cathode of the battery, the other end of the second resistance collection with first triode respectively
One fixing end of the connection of one end of electrode and the second capacitor, the other end of second capacitor and the third potentiometer connects
Connect, another fixing end of the third potentiometer is connect with the cathode of the battery, the sliding end of the third potentiometer with
The anode of the first diode connects, the cathode of the first diode respectively with one end of the third capacitor and loudspeaker
One end connection, the other end of the third capacitor and the other end of loudspeaker connect with the cathode of the battery, described the
The model S-202T of one diode.
2. omnidirectional microphone according to claim 1, which is characterized in that the microphone circuit further includes the 4th resistance,
One end of 4th resistance is connect with the cathode of the first diode, the other end and the loudspeaker of the 4th resistance
One end connection, the resistance value of the 4th resistance is 47k Ω.
3. omnidirectional microphone according to claim 2, which is characterized in that the microphone circuit further includes the 5th resistance,
One end of 5th resistance is connect with the emitter of first triode, the other end and the battery of the 5th resistance
Cathode connection, the resistance value of the 5th resistance is 55k Ω.
4. according to claim 1 to omnidirectional microphone described in 3 any one, which is characterized in that first triode is NPN
Type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820869666.4U CN208241860U (en) | 2018-06-06 | 2018-06-06 | Omnidirectional microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820869666.4U CN208241860U (en) | 2018-06-06 | 2018-06-06 | Omnidirectional microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208241860U true CN208241860U (en) | 2018-12-14 |
Family
ID=64576629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820869666.4U Expired - Fee Related CN208241860U (en) | 2018-06-06 | 2018-06-06 | Omnidirectional microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208241860U (en) |
-
2018
- 2018-06-06 CN CN201820869666.4U patent/CN208241860U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181214 Termination date: 20200606 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |