CN102291640B - Double-contact mobile phone earphone socket - Google Patents
Double-contact mobile phone earphone socket Download PDFInfo
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- CN102291640B CN102291640B CN201110190060.0A CN201110190060A CN102291640B CN 102291640 B CN102291640 B CN 102291640B CN 201110190060 A CN201110190060 A CN 201110190060A CN 102291640 B CN102291640 B CN 102291640B
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- pin
- mobile phone
- earphone
- magnetic bead
- detection
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Abstract
The invention discloses a double-contact mobile phone earphone socket, which is installed in a mobile phone and is connected with the central processing unit (CPU) of the mobile phone through a mobile phone earphone detection circuit. A ground pin and a detection pin are arranged in the jack of the double-contact mobile phone earphone socket and are connected with the CPU of the mobile phone through the mobile phone earphone detection circuit. An earphone male connector in the invention is provided with a ground section, a microphone (MIC) section, a left sound channel section and a right sound channel section, wherein only the ground section can be used for realizing conduction. Compared with the prior art, by detecting the insertion of the male connector, a ground metal ring on an earphone can be connected with two detection pins and therefore the problems in impedance matching and bias voltage are solved; and moreover, by using the male connector to conduct the detection pins, the problem of dust and foreign matters is solved, and if the foreign matters are attached onto an elastic piece, through the action of inserting the male connector, the foreign matters can be rubbed off.
Description
Technical field
The present invention relates to handset earphone detection technique, particularly a kind of Double-contact mobile phone earphone socket.
Background technology
Along with the fast development of mobile communication technology, the use of mobile phone is also more and more extensive.The effect of the earphone jack wherein on mobile phone is: when earphone inserts, sound on mobile phone is switched on earphone, and how mobile phone has been judged whether that earphone inserts, it is normally undertaken detecting by interrupt signal, and interrupt signal is suddenlyd change by level and triggers.
Current handset earphone inserts the common level abrupt climatic change mode of detection and mainly comprises following several:
One, utilize earphone socket to detect pin high level to detect, before earphone male is inserted, the detection pin of earphone socket is connected with signal pins, detection signal is low level, after plugged earphone, detects pin and signal pins disconnection, detect pin and become high level, detect that earphone inserts.As shown in Figure 1, before plugged earphone, 3 pin contact with 4 pin its schematic diagram, and by the electric resistance partial pressure of 100K and 2K, now Vdet is low level, and after plugged earphone, 3 pin and 4 pin disconnect, and now Vdet becomes high level, has detected that earphone inserts.Adopt this detection mode, earphone socket needs contact with one of them signal pins detecting pin, earphone male flicks after inserting, the advantage of this detection mode does not affect by external equipment, can detect as long as male is inserted, shortcoming is that when there are foreign material between detection pin and signal pins, the two cannot conducting, system judges that earphone is in insert state, and now earphone symbol does not disappear.
Two, utilize pull-up resistor low level to detect, as shown in Figure 2, signal pins connects 100K resistance, and detection signal is connected between resistance and signal pins its schematic diagram.Before plugged earphone, detection signal is high level, and after plugged earphone, the receiver on pull-up resistor and earphone forms loop, and by the dividing potential drop effect of receiver 32 Europe impedance, test point signal level is dragged down, and detects that earphone inserts.This detection mode there will not be the problems referred to above, but affect by external equipment resistance value, when external equipment (as active audio amplifier) impedance is close or be greater than 100K, dividing potential drop just cannot realize dragging down level effect, and bias voltage can be there is in the signal pins be connected with pull-up resistor always, the life-span of music phone decoding chip can be affected.
Three, utilize earphone socket to detect pin low level to detect, its schematic diagram as shown in Figure 3, earphone socket does two independent detection pin, and signal pins is uncorrelated.Two are detected pin and separate at first (being commonly called as normal opening structure), and one connects detection signal (first setting high level), a ground connection.Latter two pin of plugged earphone couples together, and detection signal is dragged down, and judges to insert to earphone, and before plugged earphone, 4 pin and 6 pin disconnect, and Vdet is high level.After plugged earphone, 4 pin contact with 6 pin, and form loop, Vdet becomes low level, detects that earphone inserts.This mode advantage, for not affect by external equipment, can detect as long as male is inserted, also there will not be earphone symbol problem.Shortcoming is that earphone socket volume is comparatively large, and versatility is not high, and earphone socket detects pin when having a booty, can None-identified to the insertion of earphone.
Summary of the invention
In view of above problem, the object of the present invention is to provide a kind of Double-contact mobile phone earphone socket, realized when earphone inserts by this earphone socket, make the earthing metal ring on earphone detect pin be communicated with two.
For achieving the above object, the present invention is mainly by the following technical solutions:
A kind of Double-contact mobile phone earphone socket, be arranged in mobile phone, be connected with mobile phone CPU by handset earphone testing circuit, be provided with a grounding leg (10) and detection pin (40) in the jack of this Double-contact mobile phone earphone socket, described grounding leg (10) is connected with mobile phone CPU by handset earphone testing circuit with detection pin (40).
MIC pin (20), R channel pin (30) and L channel pin (50) are also installed in wherein said earphone socket for cell phone.
Wherein said handset earphone testing circuit comprises detection signal input HEAD_DET, audio signal input end XMP3_R, XMP3_L, microphone signal input XMIC, reserved resistance R63, the first filtering magnetic bead inductance B601, the second filtering magnetic bead inductance B602, the 3rd filtering magnetic bead inductance B603 and the 4th filtering magnetic bead inductance B607.
Wherein said detection pin (40) is connected to the detection signal input HEAD_DET of mobile phone CPU by reserved resistance R63, and reserved resistance R63 is connected to power supply by current-limiting resistance.
Wherein said R channel pin MP3R is connected to audio signal input end XMP3_R by the first filtering magnetic bead inductance B601.
Wherein said L channel pin MP3L is connected to audio signal input end XMP3_L by the second filtering magnetic bead inductance B602.
Wherein said microphone pin MIC is connected to microphone signal input XMIC by the 3rd filtering magnetic bead inductance B603.
Wherein said grounding leg GND one end is by the 4th filtering magnetic bead inductance B607 ground connection, and one end is connected to broadcast antenna FM_ANT.
In the present invention, earphone male has ground, MIC, L channel and R channel four joint, and that joint of ground connection can only be utilized to realize conducting.Compared with prior art, the present invention is inserted by male and detects, and makes the earthing metal ring on earphone detect pin be communicated with two, thus solves impedance matching and bias voltage problem; And by male conduction detection pin, solve dust foreign material problem, invest on shell fragment if any foreign material, by the insert action of male, foreign material can be rubbed off.
Accompanying drawing explanation
Fig. 1 is the existing circuit theory diagrams utilizing earphone socket to detect the detection of pin high level.
Fig. 2 is the existing circuit theory diagrams utilizing pull-up resistor low level to detect.
Fig. 3 is the existing circuit theory diagrams utilizing earphone socket to detect the detection of pin low level.
Fig. 4 is the circuit theory diagrams that the present invention utilizes male low level and detects.
Fig. 5 is the earphone interface schematic diagram that the present invention adopts.
Fig. 6 is handset earphone jack perspective view of the present invention.
Fig. 7 is handset earphone jack upward view of the present invention.
Identifier declaration in figure: ground connection 1, microphone 2, L channel 3, R channel 4, grounding leg 10, MIC pin 20, R channel pin 30, detection pin 40, L channel pin 50.
Embodiment
For setting forth thought of the present invention and object, below in conjunction with the drawings and specific embodiments, the present invention is described further.
Shown in Figure 4, Fig. 4 is the circuit theory diagrams that the present invention utilizes male low level and detects.The invention provides a kind of Male joint low level detection circuit for earphone of cell phone, comprise earphone stand JK601 and mobile phone CPU, earphone is connected with mobile phone CPU by earphone stand JK601,1 pin on this earphone stand JK601 is grounding leg GND, 2 pin are microphone pin MIC, 3 pin are R channel pin MP3R, 5 pin are L channel pin MP3L, 4 pin are input pin, described input pin is connected to the detection signal input HEAD_DET of mobile phone CPU by reserved resistance R63, and reserved resistance R63 is connected to power supply by current-limiting resistance; Described R channel pin MP3R is connected to audio signal input end XMP3_R by the first filtering magnetic bead inductance B601; Described L channel pin MP3L is connected to audio signal input end XMP3_L by the second filtering magnetic bead inductance B602; Described microphone pin MIC is connected to microphone signal input XMIC by the 3rd filtering magnetic bead inductance B603; Described grounding leg GND one end is by the 4th filtering magnetic bead inductance B607 ground connection, and one end is connected to broadcast antenna FM_ANT.
As shown in Figure 5, Fig. 5 is the earphone interface schematic diagram that the present invention adopts.This earphone male is provided with ground connection 1, microphone 2, L channel 3, R channel 4 four joint part, often joint is a becket.Ground connection 1 is received on lower margin GND and detection signal pin simultaneously, realizes the conducting of these two pins, and microphone 2, L channel 3, R channel 4 are connected respectively microphone pin MIC, L channel pin MP3L, R channel pin MP3R.
The detection signal input HEAD_DET of mobile phone CPU of the present invention is used for the detection signal whether Test earphone has insertion, (low level is become suddenly from high level when level sudden change occurs HEAD_DET time, or become high level suddenly from low level), CPU will detect that earphone inserts.
Circuit of the present invention is also the principle utilizing level to suddenly change, and HEAD_DET, from mobile phone CPU, is high level when circuit does not have in harness.Before earphone inserts, 1 pin of earphone stand JK601 and 4 pin disconnect, and circuit does not form loop, and the two ends of 100K resistance do not have voltage difference, HEAD_DET or high level 2.8V (in mobile phone, general more than 2.2V is identified as high level, and below 0.6V is identified as low level).After earphone inserts, 1 pin is communicated with by earphone heads with 4 pin, because 1 pin is ground connection, circuit just defines a loop, electric current from 2.8V (power supply), through 100K resistance, 1 pin, 4 pin and B607 to ground, HEAD_DET becomes low level 0V, detects that earphone inserts.
As shown in Figure 6,7, Fig. 6 is handset earphone jack perspective view of the present invention; Fig. 7 is handset earphone jack upward view of the present invention.Double-contact mobile phone earphone socket of the present invention, be arranged in mobile phone, be connected with mobile phone CPU by the handset earphone testing circuit in above-mentioned Fig. 4, a grounding leg 10 and a detection pin 40 is provided with in the jack of this Double-contact mobile phone earphone socket, described grounding leg 10 is connected with mobile phone CPU by handset earphone testing circuit with detection pin 40, is also provided with MIC pin 20, R channel pin 30 and L channel pin 50 in addition in earphone socket for cell phone.
When in Fig. 5, earphone male is inserted into this earphone socket, in Fig. 5 the ground connection 1 of plug and the grounding leg 10 of earphone socket with detect that pin 40 is corresponding to be contacted, L channel pin 50 is connected with L channel 3 simultaneously, and R channel pin 30 is connected with R channel 4, and MIC pin 20 is connected with microphone 2.
More than that a kind of Double-contact mobile phone earphone socket provided by the present invention is described in detail, apply specific case herein to set forth structural principle of the present invention and execution mode, above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (1)
1. a Double-contact mobile phone earphone socket, be arranged in mobile phone, be connected with mobile phone CPU by handset earphone testing circuit, it is characterized in that being provided with a grounding leg (10) and detection pin (40) in the jack of this Double-contact mobile phone earphone socket, described grounding leg (10) is connected with mobile phone CPU by handset earphone testing circuit with detection pin (40); MIC pin (20), R channel pin (30) and L channel pin (50) are also installed in described earphone socket for cell phone, and detection signal input HEAD_DET, audio signal input end XMP3_R, XMP3_L, microphone signal input XMIC, reserved resistance R63, the first filtering magnetic bead inductance B601, the second filtering magnetic bead inductance B602, the 3rd filtering magnetic bead inductance B603 and the 4th filtering magnetic bead inductance B6070; Wherein,
Described detection pin (40) is connected to the detection signal input HEAD_DET of mobile phone CPU by reserved resistance R63, and reserved resistance R63 is connected to power supply by current-limiting resistance;
Described R channel pin MP3R is connected to audio signal input end XMP3_R by the first filtering magnetic bead inductance B601;
Described L channel pin MP3L is connected to audio signal input end XMP3_L by the second filtering magnetic bead inductance B602;
Described microphone pin MIC is connected to microphone signal input XMIC by the 3rd filtering magnetic bead inductance B603;
Described grounding leg GND one end is by the 4th filtering magnetic bead inductance B607 ground connection, and one end is connected to broadcast antenna FM_ANT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110190060.0A CN102291640B (en) | 2011-07-07 | 2011-07-07 | Double-contact mobile phone earphone socket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110190060.0A CN102291640B (en) | 2011-07-07 | 2011-07-07 | Double-contact mobile phone earphone socket |
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| Publication Number | Publication Date |
|---|---|
| CN102291640A CN102291640A (en) | 2011-12-21 |
| CN102291640B true CN102291640B (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110190060.0A Expired - Fee Related CN102291640B (en) | 2011-07-07 | 2011-07-07 | Double-contact mobile phone earphone socket |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104469615A (en) * | 2014-12-15 | 2015-03-25 | 上海华勤通讯技术有限公司 | Terminal device and earphone circuit thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11288766A (en) * | 1998-04-01 | 1999-10-19 | Matsushita Electric Ind Co Ltd | Plug insertion detecting device |
| CN101316111A (en) * | 2008-07-23 | 2008-12-03 | 嘉兴闻泰通讯科技有限公司 | Mobile terminal headphone |
| CN201349247Y (en) * | 2008-12-22 | 2009-11-18 | 宇龙计算机通信科技(深圳)有限公司 | Earphone interface circuit and movable termination |
| CN101630802A (en) * | 2008-07-15 | 2010-01-20 | 深圳富泰宏精密工业有限公司 | Headphone jack structure |
| CN101783986A (en) * | 2010-03-17 | 2010-07-21 | 青岛海信移动通信技术股份有限公司 | Earphone interface circuit and electronic equipment |
| CN202095071U (en) * | 2011-07-07 | 2011-12-28 | 深圳市金立通信设备有限公司 | Double-contact earphone socket for cell phone |
-
2011
- 2011-07-07 CN CN201110190060.0A patent/CN102291640B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11288766A (en) * | 1998-04-01 | 1999-10-19 | Matsushita Electric Ind Co Ltd | Plug insertion detecting device |
| CN101630802A (en) * | 2008-07-15 | 2010-01-20 | 深圳富泰宏精密工业有限公司 | Headphone jack structure |
| CN101316111A (en) * | 2008-07-23 | 2008-12-03 | 嘉兴闻泰通讯科技有限公司 | Mobile terminal headphone |
| CN201349247Y (en) * | 2008-12-22 | 2009-11-18 | 宇龙计算机通信科技(深圳)有限公司 | Earphone interface circuit and movable termination |
| CN101783986A (en) * | 2010-03-17 | 2010-07-21 | 青岛海信移动通信技术股份有限公司 | Earphone interface circuit and electronic equipment |
| CN202095071U (en) * | 2011-07-07 | 2011-12-28 | 深圳市金立通信设备有限公司 | Double-contact earphone socket for cell phone |
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| Publication number | Publication date |
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| CN102291640A (en) | 2011-12-21 |
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