CN102291640A - Double-contact mobile phone earphone socket - Google Patents
Double-contact mobile phone earphone socket Download PDFInfo
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- CN102291640A CN102291640A CN2011101900600A CN201110190060A CN102291640A CN 102291640 A CN102291640 A CN 102291640A CN 2011101900600 A CN2011101900600 A CN 2011101900600A CN 201110190060 A CN201110190060 A CN 201110190060A CN 102291640 A CN102291640 A CN 102291640A
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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 the handset earphone detection technique, particularly a kind of double-contact handset earphone socket.
Background technology
Along with the fast development of mobile communication technology, the use of mobile phone also more and more widely.Wherein the effect of the earphone jack on the mobile phone is: when earphone inserts, sound on the mobile phone is switched on the earphone, and how having judged whether that for mobile phone earphone inserts, it normally detects by interrupt signal, and interrupt signal is by the level sudden change and trigger.
At present handset earphone insert detect common level sudden change detection mode mainly comprise following several:
One, utilize earphone socket to detect the pin high level and detect, before the earphone male was inserted, the detection pin of earphone socket linked to each other with signal pins, detection signal is a low level, behind the insertion earphone, detects pin and signal pins and disconnects, detect pin and become high level, detect earphone and insert.Its schematic diagram is seen shown in Figure 1, and before the insertion earphone, 3 pin contact with 4 pin, and by the electric resistance partial pressure of 100K and 2K, this moment, Vdet was a low level, and after inserting earphone, 3 pin and 4 pin disconnect, and this moment, Vdet became high level, had detected the earphone insertion.Adopt this detection mode, need on the earphone socket to contact with one of them signal pins detecting pin, the earphone male flicks after inserting, the advantage of this detection mode is not influenced by external equipment, as long as male is inserted and can be detected, shortcoming is when having foreign material between detection pin and the signal pins, and the two can't conducting, system judges that earphone is in the insertion state, and this moment, the earphone symbol did not disappear.
Two, utilize the pull-up resistor low level to detect, its schematic diagram is seen shown in Figure 2, connects 100K resistance on signal pins, and detection signal is connected between resistance and the signal pins.Before inserting earphone, detection signal is a high level, and behind the insertion earphone, the receiver on pull-up resistor and the earphone forms the loop, and by the dividing potential drop effect of receiver 32 Europe impedances, the test point signal level is dragged down, and detects earphone and inserts.This detection mode the problems referred to above can not occur, but influenced by the external equipment resistance value, when external equipment (as active audio amplifier) impedance near or greater than 100K, dividing potential drop just can't realize dragging down the level effect, and with can have bias voltage on the signal pins that pull-up resistor links to each other always, can influence the life-span of music phone decoding chip.
Three, utilize earphone socket to detect the pin low level and detect, its schematic diagram is seen shown in Figure 3, and it is uncorrelated to do two independent detection pin and signal pins on earphone socket.Two detection pin separate (being commonly called as normal opening structure) at first, and one connects detection signal (putting high level earlier), a ground connection.Insert latter two pin of earphone and couple together, detection signal is dragged down, and judges that earphone inserts, and before the insertion earphone, 4 pin and 6 pin disconnect, and Vdet is a high level.After inserting earphone, 4 pin contact with 6 pin, form the loop, and Vdet becomes low level, detect earphone and insert.This mode advantage influences for not being subjected to external equipment, can detect as long as male is inserted, and earphone symbol problem also can not occur.Shortcoming is that the earphone socket volume is bigger, and versatility is not high, and earphone socket can can't recognize the insertion of earphone when detecting pin booty being arranged.
Summary of the invention
In view of above problem, the object of the present invention is to provide a kind of double-contact handset earphone socket, when being implemented in the earphone insertion, the grounded metal ring on the earphone is communicated with two detection pin by this earphone socket.
For achieving the above object, the present invention is mainly by the following technical solutions:
A kind of double-contact handset earphone socket, be installed in the mobile phone, be connected with mobile phone CPU by the handset earphone testing circuit, be provided with a grounding leg (10) and a detection pin (40) in the jack of this double-contact handset earphone socket, described grounding leg (10) is connected with mobile phone CPU by the handset earphone testing circuit with detection pin (40).
MIC pin (20), R channel pin (30) and L channel pin (50) also are installed in the wherein said handset earphone socket.
Wherein said handset earphone testing circuit comprises detection signal input HEAD_DET, audio signal input end XMP3_R, XMP3_L, microphone signal input XMIC, reserves resistance R 63, 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 by reserving the detection signal input HEAD_DET that resistance R 63 is connected to mobile phone CPU, and reserves resistance R 63 and be 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 an end is connected to broadcast antenna FM_ANT.
The earphone male has ground, MIC, L channel and R channel four joints among the present invention, and can only utilize that joint of ground connection to realize conducting.Compared with prior art, the present invention inserts by male and detects, and the grounded metal ring on the earphone is communicated with two detection pin, thereby has solved impedance matching and bias voltage problem; And, solved dust foreign material problem by male conduction detection pin, and invest on the shell fragment if any foreign material, by the insert action of male, can rub off foreign material.
Description of drawings
Fig. 1 detects the circuit theory diagrams that the pin high level detects for the existing earphone socket that utilizes.
Fig. 2 is the existing circuit theory diagrams that utilize the pull-up resistor low level to detect.
Fig. 3 detects the circuit theory diagrams that the pin low level detects for the existing earphone socket that utilizes.
The circuit theory diagrams that Fig. 4 utilizes the male low level to detect for the present invention.
The earphone interface schematic diagram that Fig. 5 adopts for the present invention.
Fig. 6 is a handset earphone jack perspective view of the present invention.
Fig. 7 is a handset earphone jack upward view of the present invention.
Identifier declaration among the 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 purpose, the present invention is described further below in conjunction with the drawings and specific embodiments.
See also shown in Figure 4, the circuit theory diagrams that Fig. 4 utilizes the male low level to detect for the present invention.The invention provides a kind of handset earphone male low level testing circuit, 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 that grounding leg GND, 2 pin are that microphone pin MIC, 3 pin are that R channel pin MP3R, 5 pin are that L channel pin MP3L, 4 pin are the input pin, described input pin is by reserving the detection signal input HEAD_DET that resistance R 63 is connected to mobile phone CPU, and reserves resistance R 63 and be 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 an end is connected to broadcast antenna FM_ANT.
As shown in Figure 5, Fig. 5 is the earphone interface schematic diagram of the present invention's employing.This earphone male is provided with ground connection 1, microphone 2, L channel 3, R channel 4 four joint parts, and every joint is a becket.Ground connection 1 is received on lower margin GND and the detection signal pin simultaneously, realizes the conducting of these two pins, and microphone 2, L channel 3, R channel 4 correspondence respectively are connected to 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 to detect the detection signal whether earphone has insertion, when the level sudden change takes place HEAD_DET, (become low level suddenly by high level, perhaps become high level suddenly by low level), CPU will detect earphone and insert.
Circuit of the present invention also is a principle of utilizing the level sudden change, and HEAD_DET is high level from mobile phone CPU when circuit is not worked.Before earphone inserts, 1 pin and 4 pin of earphone stand JK601 disconnect, and do not form the loop on the circuit, and the two ends of 100K resistance do not have voltage difference, HEAD_DET still is high level 2.8V (is identified as high level more than the general 2.2V in the mobile phone, is identified as low level below the 0.6V).After earphone inserted, 1 pin and 4 pin were communicated with by earphone heads, because 1 pin is a ground connection, circuit has just formed a loop, and electric current arrives ground from 2.8V (power supply) through 100K resistance, 1 pin, 4 pin and B607, HEAD_DET has become low level 0V, detects earphone and inserts.
Shown in Fig. 6,7, Fig. 6 is a handset earphone jack perspective view of the present invention; Fig. 7 is a handset earphone jack upward view of the present invention.Double-contact handset earphone socket of the present invention, be installed in the mobile phone, be connected with mobile phone CPU by the handset earphone testing circuit among above-mentioned Fig. 4, be provided with a grounding leg 10 and a detection pin 40 in the jack of this double-contact handset earphone socket, described grounding leg 10 is connected with mobile phone CPU by the handset earphone testing circuit with detection pin 40, and MIC pin 20, R channel pin 30 and L channel pin 50 also are installed in the handset earphone socket in addition.
When the earphone male is inserted into this earphone socket among Fig. 5, the grounding leg 10 of the ground connection 1 of plug and earphone socket and detect pin 40 corresponding contacts among Fig. 5, 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 be that a kind of double-contact handset earphone socket provided by the present invention is described in detail, used specific case herein structural principle of the present invention and execution mode are set forth, above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. double-contact handset earphone socket, be installed in the mobile phone, be connected with mobile phone CPU by the handset earphone testing circuit, it is characterized in that being provided with in the jack of this double-contact handset earphone socket a grounding leg (10) and one and detect pin (40), described grounding leg (10) and detection pin (40) are connected with mobile phone CPU by the handset earphone testing circuit.
2. double-contact handset earphone socket according to claim 1 is characterized in that also being equipped with in the described handset earphone socket MIC pin (20), R channel pin (30) and L channel pin (50).
3. double-contact handset earphone socket according to claim 1 is characterized in that described handset earphone testing circuit comprises detection signal input HEAD_DET, audio signal input end XMP3_R, XMP3_L, microphone signal input XMIC, reserves resistance R 63, 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.
4. double-contact handset earphone socket according to claim 3 is characterized in that described detection pin (40) by reserving the detection signal input HEAD_DET that resistance R 63 is connected to mobile phone CPU, and reserves resistance R 63 and be connected to power supply by current-limiting resistance.
5. double-contact handset earphone socket according to claim 3 is characterized in that described R channel pin MP3R is connected to audio signal input end XMP3_R by the first filtering magnetic bead inductance B601.
6. double-contact handset earphone socket according to claim 3 is characterized in that described L channel pin MP3L is connected to audio signal input end XMP3_L by the second filtering magnetic bead inductance B602.
7. double-contact handset earphone socket according to claim 3 is characterized in that described microphone pin MIC is connected to microphone signal input XMIC by the 3rd filtering magnetic bead inductance B603.
8. double-contact handset earphone socket according to claim 3 is characterized in that described grounding leg GND one end by the 4th filtering magnetic bead inductance B607 ground connection, and an 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 |
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| CN102291640A true CN102291640A (en) | 2011-12-21 |
| CN102291640B CN102291640B (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110190060.0A Expired - Fee Related CN102291640B (en) | 2011-07-07 | 2011-07-07 | Double-contact mobile phone earphone socket |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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)
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| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN102291640B (en) | 2014-12-17 |
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