CN105792054B - A kind of key control circuit of earphone - Google Patents
A kind of key control circuit of earphone Download PDFInfo
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- CN105792054B CN105792054B CN201610345198.6A CN201610345198A CN105792054B CN 105792054 B CN105792054 B CN 105792054B CN 201610345198 A CN201610345198 A CN 201610345198A CN 105792054 B CN105792054 B CN 105792054B
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- earphone
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Telephone Function (AREA)
- Telephone Set Structure (AREA)
Abstract
The key control circuit and control method of a kind of earphone provided by the invention, including earphone socket, earphone and intelligence key circuit, the intelligence key circuit are connected with the earphone socket and the earphone respectively；Intelligence key circuit includes MCU, closed button, low-pass filter, resistance R3 and capacitor C1,4th pin of earphone socket is connected with one end of one end of the closed button, one end of the resistance R3, the low-pass filter respectively, the other end of the closed button is connected with the detection pin of the 4th pin of the earphone and the MCU respectively, the other end of the resistance R3 is connected with one end of the pin VDD of the MCU and the capacitor C1 respectively, the other end of the capacitor C1 is grounded, and the other end of the low-pass filter is connected with the MCU.The present invention realizes the interaction with cell phone application, and efficiently controls cell phone application, thereby executing corresponding operation instruction.
Description
Technical field
The present invention relates to electronic technology fields, more particularly to the key control circuit and control method of a kind of earphone.
Background technique
With the continuous development of science and technology, electronic equipment has also obtained development at full speed, and the type of electronic product is also got over
Come more, people have also enjoyed the various conveniences of scientific development bring, and present people can be set by various types of electronics
It is standby, it enjoys as development in science and technology bring is comfortably lived.For example, people can be listened by being pressed into equipment connection line control earphone
Music receives calls, and connects the operation such as voice-enabled chat.
Line control earphone refers to the earphone that access device can be controlled on earphone cable, such as controls the broadcasting of mobile phone and answer function
Can, the functions such as volume is adjusted specifically can refer to the line control earphone structural schematic diagram of the prior art as shown in Figure 1, line traffic control
Earphone is three keyed, if to increase the 4th key, apple system or Android system is not allowed, thus cannot
The application of control cell phone application well, and effectively interacted with cell phone application.
Summary of the invention
The purpose of the present invention is to provide a kind of key control circuit of earphone and control methods, to solve line control earphone not
The problem of can be effectively controlled cell phone application.
In a first aspect, the embodiment of the invention provides a kind of key control circuit of earphone, including earphone socket, earphone and
Intelligence key circuit, the intelligence key circuit are connected with the earphone socket and the earphone respectively；
The intelligence key circuit includes MCU, closed button, low-pass filter, resistance R3 and capacitor C1,
4th pin of earphone socket one end, described with one end of the closed button, the resistance R3 respectively
One end of low-pass filter is connected, the other end of the closed button respectively with the 4th pin of the earphone and the MCU
Detection pin be connected, the other end of resistance R3 one end phase with the pin VDD of the MCU and the capacitor C1 respectively
Connection, the other end ground connection of the capacitor C1, the other end of the low-pass filter are connected with the MCU.
With reference to first aspect, the first possible embodiment the embodiment of the invention provides first aspect, further includes: when
When the closed button is in an off state, it is low level, the MCU that the detection pin, which detects that level is jumped by high level,
Export square wave, the square wave is filtered the square wave filtered by low-pass filter, the square wave of the filtering be added to
On the connected MIC line of 4th pin of the earphone socket and it is sent to terminal, so that the terminal determines the closed button
It is pressed；
When the closed button in the closure state, the detection pin detect the level by low level jump be
When the high level, the MCU stops exporting the square wave；
When the terminal can't detect the square wave, the closed button is released.
The first possible embodiment with reference to first aspect, may the embodiment of the invention provides second of first aspect
Embodiment, further includes: when the closed button is in the closed state, the earphone is in the conductive state.
With reference to first aspect, the third possible embodiment, the earphone the embodiment of the invention provides first aspect
Socket includes the first pin, the second pin, third pin and the 4th pin；
First pin of the earphone socket respectively with the left earphone of the first pin of the earphone and the earphone
One end is connected, the second pin of the earphone socket respectively with the right earphone of the second pin of the earphone and the earphone
First end is connected, the third pin of the earphone socket respectively with the third pin of the earphone, microphone MIC one end,
One end of play button, one end of upper switch key, one end of lower switch key and the right earphone second end be connected, the ear
4th pin of machine transplanting of rice seat is connected by the closed button with the 4th pin of the earphone.
The third possible embodiment with reference to first aspect, the embodiment of the invention provides the 4th kind of possibility of first aspect
Embodiment, further includes: in the earphone, the other end of the microphone MIC respectively with the other end of the play button,
4th pin of one end of resistance R1, one end of resistance R2 and the earphone is connected, the resistance R1 and the upper switching
Key series connection, the resistance R2 connects with the lower switch key, the resistance R1, the upper switch key and the resistance R2, described
Lower switch key is in parallel, and is connected with the 4th pin of the earphone.
The first possible embodiment with reference to first aspect, the embodiment of the invention provides the 5th kind of possibility of first aspect
Embodiment, the terminal be mobile phone.
The third possible embodiment with reference to first aspect, the embodiment of the invention provides the 6th kind of possibility of first aspect
Embodiment, the first pin of the earphone socket be L channel, the earphone socket the second pin be right channel, it is described
The third pin of earphone socket is ground wire, and the 4th pin of the earphone socket is microphone.
The third possible embodiment with reference to first aspect, the embodiment of the invention provides the 7th kind of possibility of first aspect
Embodiment, the first pin of the earphone is L channel, and the second pin of the earphone is right channel, the of the earphone
Three-prong is ground wire, and the 4th pin of the earphone is microphone.
Second aspect, the embodiment of the invention provides a kind of key control methods of earphone, are applied to terminal, the method
Include:
Receive the square wave at least one filtering that key control circuit is sent；
Corresponding operation instruction is executed according to the number of the square wave of at least one filtering.
In conjunction with second aspect, the first possible embodiment, the operation the embodiment of the invention provides second aspect
Instruction includes cutting song, collection list of songs, sharing social platform and/or recorded speech.
The key control circuit and control method of a kind of earphone provided according to the present invention insert intelligence key circuit by earphone
Seat is connected with earphone, and plug is connected with terminal, and when closed button is in an off state, detection pin detects electricity
Flat jumped by high level is low level, and MCU exports square wave, and square wave is filtered the square wave filtered by low-pass filter,
The square wave of filtering be added to earphone socket the 4th pin and be sent to terminal；When closed button in the closure state, detection
It is high level that pin, which detects that level is jumped by low level, and MCU stops output square wave, to make the key control circuit of earphone can
It to efficiently control cell phone application, and is interacted with cell phone application, thereby executing corresponding operation instruction.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the line control earphone structural schematic diagram of the prior art；
Fig. 2 is a kind of key control circuit schematic diagram of earphone provided in an embodiment of the present invention；
Fig. 3 is a kind of key control method flow chart of earphone provided in an embodiment of the present invention.
Description of symbols:
10- earphone socket；20- intelligence key circuit；30- earphone.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
Middle attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is real
The component for applying example can be arranged and be designed with a variety of different configurations.Therefore, of the invention to what is provided in the accompanying drawings below
The detailed description of embodiment is not intended to limit the range of claimed invention, but is merely representative of selected reality of the invention
Apply example.Based on the embodiment of the present invention, those skilled in the art institute obtained without making creative work
There are other embodiments, shall fall within the protection scope of the present invention.
Aiming at the problem that line control earphone not can be effectively controlled cell phone application in the prior art, the present invention provides a kind of earphones
Key control circuit and control method, closed button is detected in off-state by the detection pin of the MCU in intelligence key circuit
Or corresponding low level or high level when closed state, MCU determine whether progress side according to the high level or low level that detect
Wave output, to realize the interaction with cell phone application, and efficiently controls cell phone application, refers to thereby executing corresponding operation
It enables.It is described in detail below by embodiment.
Fig. 2 is a kind of key control circuit schematic diagram of earphone provided in an embodiment of the present invention.
Referring to Fig. 2, the key control circuit of earphone includes earphone socket 10, earphone 30 and intelligence key circuit 20, the intelligence key
Circuit 20 is connected with the earphone socket 10 and the earphone 30 respectively.
The intelligence key circuit includes MCU, closed button, low-pass filter, resistance R3 and capacitor C1,
4th pin of the earphone socket 10 respectively with one end of the closed button, one end of the resistance R3, institute
The one end for stating low-pass filter is connected, the other end of the closed button respectively with the 4th pin and MCU of the earphone 30
Detection pin be connected, the other end of resistance R3 one end phase with the pin VDD of the MCU and the capacitor C1 respectively
Connection, the other end ground connection of the capacitor C1, the other end of the low-pass filter are connected with the MCU.
Here, earphone socket 10 includes four pins, respectively the first pin, the second pin, third pin and the 4th pipe
Foot.
Earphone 30 also includes four pins, respectively the first pin, the second pin, third pin and the 4th pin.
An exemplary embodiment of the present invention, further includes: when the closed button is in an off state, the detection
It is low level that pin, which detects that level is jumped by high level, and the MCU exports square wave, and the square wave is carried out by low-pass filter
The square wave filtered, the square wave of the filtering be added to the earphone socket 10 the 4th pin and be sent to terminal,
So that the terminal determines that the closed button is pressed；
When the closed button in the closure state, the detection pin detect the level by low level jump be
The high level, the MCU stop exporting the square wave；
When the terminal can't detect the square wave, the closed button is released.
Specifically, when closed button disconnects, illustrate that closed button is pressed, at this point, be respectively connected with closed button
The MIC line of 4th pin of the MIC line and earphone 30 of the 4th pin of earphone socket 10 disconnects.
It is low level that detection pin, which detects that level is jumped by high level, and MCU exports square wave, and square wave passes through low-pass filter
It is filtered the square wave filtered, the square wave of filtering is added on the MIC line being connected with the 4th pin of earphone socket 10 simultaneously
It is sent to terminal, after terminal receives square wave, determines that closed button has been pressed.
When user discharges closed button, the MIC line of the 4th pin of the earphone socket 10 being respectively connected with closed button
It is connected with the MIC line of the 4th pin of earphone 30, level jumps to high level by low level, and MCU stops the output of square wave, and
When terminal can't detect square wave, then it is assumed that closed button is released.
Here, terminal can be such as, but not limited to, be specially mobile phone.
The square wave of MCU output can be such as, but not limited to, be specially 19Khz.
An exemplary embodiment of the present invention, further includes: described when the closed button is in the closed state
Earphone 30 is in the conductive state.
Specifically, when closed button in the closure state, illustrate that closed button is not pressed.At this point, with left earphone
First end and second end, the line of the first end and second end of right earphone connection are in the conductive state, and intelligence key circuit 20 does not interfere
The normal operating of earphone 30.
An exemplary embodiment of the present invention, the earphone socket 10 include the first pin, the second pin, third pin
With the 4th pin；
First pin of the earphone socket 10 left ear with the first pin of the earphone 30 and the earphone 30 respectively
The first end of machine is connected, the second pin of the earphone socket 10 respectively with the second pin and the earphone of the earphone 30
The first end of 30 right earphone is connected, the third pin of the earphone socket 10 respectively with the third pin of the earphone 30,
One end of microphone MIC, one end of play button, one end of upper switch key, one end of lower switch key and the right earphone
Two ends are connected, and the 4th pin of the earphone socket 10 is connected by the closed button with the 4th pin of the earphone 30
It connects.
An exemplary embodiment of the present invention, further includes: in the earphone 30, the other end of the microphone MIC
Respectively with the 4th pin phase of the other end of the play button, one end of resistance R1, one end of resistance R2 and the earphone 30
Connection, the resistance R1 connect with the upper switch key, and the resistance R2 connects with the lower switch key, the resistance R1, institute
It is in parallel with the resistance R2, the lower switch key to state switch key, and is connected with the 4th pin of the earphone 30.
Here, resistance R1 is 600 Europe, and resistance R2 is 220 Europe.
An exemplary embodiment of the present invention, the first pin of the earphone socket 10 is L channel, the earphone is inserted
Seat 10 the second pin be right channel, the earphone socket 10 third pin be ground wire, the earphone socket 10 the 4th pipe
Foot is microphone.
An exemplary embodiment of the present invention, the first pin of the earphone 30 are L channel, the of the earphone 30
Two pins are right channel, and the third pin of the earphone 30 is ground wire, and the 4th pin of the earphone 30 is microphone.
Here, four pins of earphone 30 can be another mode, specifically, the first pin of earphone 30 is Zuo Sheng
Road, the second pin of earphone 30 are right channel, and the third pin of earphone 30 is microphone, and the 4th pin of the earphone 30 is ground
Line.
The present invention is L channel using the first pin of earphone 30, and the second pin of earphone 30 is right channel, earphone
30 third pin is ground wire, and the 4th pin of earphone 30 is this mode of microphone.
Intelligence key circuit is passed through earphone socket and earphone phase by a kind of key control circuit of the earphone provided according to the present invention
Connection, and plug is connected with terminal, when closed button is in an off state, detection pin detects level by high level
Jump is low level, and MCU exports square wave, and square wave is filtered the square wave filtered, the square wave of filtering by low-pass filter
It is added on the MIC line being connected with the 4th pin of earphone socket and is sent to terminal；When closed button in the closure state,
Detecting pin and detecting that level is jumped by low level is high level, and MCU stops output square wave, to make the electric by key control of earphone
Road can efficiently control cell phone application, and interact with cell phone application, thereby executing corresponding operation instruction.
Fig. 3 is a kind of key control method flow chart of earphone provided in an embodiment of the present invention.
Referring to Fig. 3, key control method is applied to terminal, specifically includes the following steps:
Step S301 receives the square wave at least one filtering that key control circuit is sent.
Step S302 executes corresponding operation instruction according to the number of the square wave of at least one filtering.
An exemplary embodiment of the present invention, the operational order include cutting song, collection list of songs, sharing social put down
Platform and/or recorded speech.
Specifically, terminal can be such as, but not limited to, be specially mobile phone.When mobile phone receives key control circuit hair
When the square wave at least one filtering sent, to execute corresponding operation instruction according to the number of the square wave of at least one filtering.
When user clicks closed button, handset identity is the square wave of a filtering, executes cut song operation at this time, and select
The song similar with previous song style is taken to be pushed to user.
When user double-clicks closed button, handset identity is the square wave of two filtering, is at this time stowed to current song
In list of songs.
When user is by three lower closed buttons, handset identity is the square wave of three filtering, at this time arrives current song sharing
In social platform.
When user often presses closed button, the operational order of recorded speech is executed at this time.
A kind of key control method of the earphone provided according to the present invention receives key control circuit transmission at least one
The square wave of filtering executes corresponding operation instruction according to the number of the square wave of at least one filtering, to make key control circuit
Cell phone application (Application, application program) can be efficiently controlled, and is interacted with cell phone application, thereby executing corresponding
Operational order.
Device provided by the embodiment of the present invention can be the specific hardware in equipment or the software being installed in equipment
Or firmware etc..The technical effect and preceding method embodiment of device provided by the embodiment of the present invention, realization principle and generation
Identical, to briefly describe, Installation practice part does not refer to place, can refer to corresponding contents in preceding method embodiment.It is affiliated
The technical staff in field can be understood that, for convenience and simplicity of description, the system of foregoing description, device and unit
Specific work process, the corresponding process during reference can be made to the above method embodiment, details are not described herein.
In embodiment provided by the present invention, it should be understood that disclosed device and method, it can be by others side
Formula is realized.The apparatus embodiments described above are merely exemplary, for example, the division of the unit, only one kind are patrolled
Function division is collected, there may be another division manner in actual implementation, in another example, multiple units or components can combine or can
To be integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Coupling or direct-coupling or call connection can be through some telephony interfaces, the INDIRECT COUPLING or call of device or unit connect
It connects, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in embodiment provided by the invention can integrate in one processing unit, it can also
To be that each unit physically exists alone, can also be integrated in one unit with two or more units.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned include: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), with
Machine accesses various Jie that can store program code such as memory (RAM, Random Access Memory), magnetic or disk
Matter.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing, in addition, term " the
One ", " second ", " third " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention.Should all it cover in protection of the invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. a kind of key control circuit of earphone, which is characterized in that including earphone socket (10), earphone (30) and intelligence key circuit
(20), the intelligence key circuit (20) is connected with the earphone socket (10) and the earphone (30) respectively；
The intelligence key circuit includes MCU, closed button, low-pass filter, resistance R3 and capacitor C1,
4th pin of the earphone socket (10) one end, described with one end of the closed button, the resistance R3 respectively
One end of low-pass filter is connected, the other end of the closed button respectively with the 4th pin of the earphone (30) and described
The detection pin of MCU is connected, the other end of the resistance R3 respectively with the pin VDD of the MCU and capacitor C1 one
End is connected, and the other end ground connection of the capacitor C1, the other end of the low-pass filter is connected with the MCU；
When the closed button is in an off state, it is low level that the detection pin, which detects that level is jumped by high level,
The MCU exports square wave, and the square wave is filtered the square wave filtered by low-pass filter, and the square wave of the filtering is folded
It is added on the MIC line being connected with the 4th pin of the earphone socket (10) and is sent to terminal, so that the terminal determines institute
Closed button is stated to be pressed；
When the closed button in the closure state, the detection pin detect the level by low level jump be described
High level, the MCU stop exporting the square wave；
When the terminal can't detect the square wave, the closed button is released.
2. a kind of key control circuit of earphone according to claim 1, which is characterized in that further include: when described normally closed
When key is in the closed state, the earphone (20) is in the conductive state.
3. a kind of key control circuit of earphone according to claim 1, which is characterized in that earphone socket (10) packet
Include the first pin, the second pin, third pin and the 4th pin；
First pin of the earphone socket (10) left side with the first pin of the earphone (30) and the earphone (30) respectively
The first end of earphone is connected, the second pin of the earphone socket (10) respectively with the second pin of the earphone (30) and institute
The first end for stating the right earphone of earphone (30) is connected, the third pin of the earphone socket (10) respectively with the earphone (30)
Third pin, one end of microphone MIC, one end of play button, one end of upper switch key, one end of lower switch key and described
The second end of right earphone is connected, and the 4th pin of the earphone socket (10) passes through the closed button and the earphone (30)
The 4th pin be connected.
4. a kind of key control circuit of earphone according to claim 3, which is characterized in that further include: in the earphone
(30) in, the other end of the microphone MIC respectively with the other end of the play button, one end of resistance R1, resistance R2 one
End and the 4th pin of the earphone (30) are connected, and the resistance R1 connects with the upper switch key, the resistance R2 and
The lower switch key series connection, the resistance R1, the upper switch key are in parallel with the resistance R2, the lower switch key, and with institute
The 4th pin for stating earphone (30) is connected.
5. a kind of key control circuit of earphone according to claim 1, which is characterized in that the terminal is mobile phone.
6. a kind of key control circuit of earphone according to claim 3, which is characterized in that the earphone socket (10)
First pin be L channel, the earphone socket (10) the second pin be the third pipe of right channel, the earphone socket (10)
Foot is ground wire, and the 4th pin of the earphone socket (10) is microphone.
7. a kind of key control circuit of earphone according to claim 3, which is characterized in that the first of the earphone (30)
Pin is L channel, and the second pin of the earphone (30) is right channel, and the third pin of the earphone (30) is ground wire, described
4th pin of earphone (30) is microphone.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610345198.6A CN105792054B (en) | 2016-05-23 | 2016-05-23 | A kind of key control circuit of earphone |
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| CN201610345198.6A CN105792054B (en) | 2016-05-23 | 2016-05-23 | A kind of key control circuit of earphone |
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| CN105792054B true CN105792054B (en) | 2019-03-29 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107374608A (en) * | 2017-07-10 | 2017-11-24 | 上海理工大学 | Music player devices shutoff device based on one-chip microcomputer photoelectric sensor |
| CN109729474B (en) * | 2018-11-19 | 2020-03-31 | 视联动力信息技术股份有限公司 | Method for switching songs and intelligent equipment |
| CN113473296B (en) * | 2021-07-01 | 2024-03-01 | 广东朝阳电子科技股份有限公司 | Control circuit and method for key expansion type wired earphone |
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Also Published As
| Publication number | Publication date |
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| CN105792054A (en) | 2016-07-20 |
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