EP2445062B1 - Audio jack with ESD protection - Google Patents

Audio jack with ESD protection Download PDF

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Publication number
EP2445062B1
EP2445062B1 EP10188508.5A EP10188508A EP2445062B1 EP 2445062 B1 EP2445062 B1 EP 2445062B1 EP 10188508 A EP10188508 A EP 10188508A EP 2445062 B1 EP2445062 B1 EP 2445062B1
Authority
EP
European Patent Office
Prior art keywords
jack
contact
audio
plug
sled
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.)
Active
Application number
EP10188508.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2445062A1 (en
Inventor
Wolfgang Edeler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BlackBerry Ltd
Original Assignee
BlackBerry Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BlackBerry Ltd filed Critical BlackBerry Ltd
Priority to EP10188508.5A priority Critical patent/EP2445062B1/en
Priority to EP14188863.6A priority patent/EP2830166B1/en
Priority to MX2011009865A priority patent/MX2011009865A/es
Priority to JP2011206537A priority patent/JP5409736B2/ja
Priority to CN201110282818.3A priority patent/CN102457786B/zh
Priority to KR1020110095928A priority patent/KR101205581B1/ko
Priority to CA2753084A priority patent/CA2753084C/en
Publication of EP2445062A1 publication Critical patent/EP2445062A1/en
Application granted granted Critical
Publication of EP2445062B1 publication Critical patent/EP2445062B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/703—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part
    • H01R13/7031—Shorting, shunting or bussing of different terminals interrupted or effected on engagement of coupling part, e.g. for ESD protection, line continuity
    • H01R13/7032—Shorting, shunting or bussing of different terminals interrupted or effected on engagement of coupling part, e.g. for ESD protection, line continuity making use of a separate bridging element directly cooperating with the terminals
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00—Carrying-off electrostatic charges
    • H05F3/02—Carrying-off electrostatic charges by means of earthing connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/58—Contacts spaced along longitudinal axis of engagement

Definitions

  • the present application relates to electrical connectors for electronic devices. More specifically, the application discloses an apparatus for protecting electronic components from electrostatic discharge from electrical connectors.
  • Electronic devices often have electrical inputs and outputs carried over connectable cables. These cables are often connected to the internal circuitry of the devices via plug-and-jack arrangements. However, any time a plug from an external cable is connected electrically to the internal circuitry of an electronic device, it carries with it the risk of damaging the device through the discharge of any electrostatic charge carried by the cable.
  • ESD electrostatic discharge
  • Some devices design their jacks to ensure that any plug being inserted comes into contact with a grounded contact before it comes into contact with the internal circuitry of the device.
  • momentary contact with a simple ground wire may not completely discharge the electrostatic charge of an external cable, and even small electrostatic charges have the capability to damage highly sensitive internal components.
  • electrostatic charge may continue to build up on some connected devices or cables after a plug is inserted, and after the external cable has been momentarily grounded by contact with the ground wire of the jack.
  • the present application describes a jack within an electronic device that is configured to ensure circuitry of the device is protected from electrostatic discharge.
  • the jack is an audio jack designed to protect the circuitry of the device against electrostatic discharge from the leads of an audio plug.
  • the present application describes an audio jack for receiving insertion of an audio plug, as recited in claim 1.
  • FIG. 4 shows the plug 202 fully inserted into the jack 2 of FIG. 1 to FIG. 3 .
  • the sled 104 has been pushed into its second position. This movement of the sled 104 causes corresponding movement of the sled plug-detect contact 106, which disconnects the jack plug-detect contact 26 from the jack left-speaker contact 30.
  • the electronic device detects this disconnection as the plug-detect signal 18, which indicates that the plug is fully or mostly inserted.
  • the movement of the sled 104 to this second position has also closed a circuit between the sled microphone-ESD contact 108, the microphone jack contact 24, the signal ground jack contact 22, and the ESD jack contact 20.
  • the four plug contacts 206, 208, 210, 212 of the plug 202 are separated by insulating rings 214. As a consequence of the separation and insulation due to the respective insulating rings 214, the plug contacts 206, 208, 210, 212 are not in immediate physical contact with one another and are not electrically connected to one another.
  • Each plug contact is electrically connected to the corresponding wire in the audio cable carrying a signal: the plug left speaker contact 206 is connected to the cable's left speaker wire, the plug right speaker contact 208 is connected to the cable's right speaker wire, and the plug microphone contact 210 is connected to the cable's microphone (or signal ground) wire.
  • the jack 2 protects the internal electrical components of the system where it is installed by bringing each plug contact surface into contact with the ESD jack contact 20 before that plug contact surface comes into contact with any of the sensitive audio circuitry of the system.
  • Low-gain components like the speaker amplifier 36, 38 outputs, are usually not highly sensitive to ESD from an external plug. The momentary contact between the speaker plug contacts 206, 208 and the ESD jack contact 20 is likely therefore sufficient to discharge any electrostatic charge built up on these leads.
  • a high-gain component like the microphone amplifier 40 input may benefit from being more thoroughly protected against ESD due to its higher sensitivity.
  • the microphone jack contact 24 is brought into circuit with the microphone plug contact 210 when it is simultaneously in circuit with both the ESD jack contact 20 and signal ground jack contact 22, and after the microphone plug contact 210 has had separate contact with the ESD jack contact 20.
  • These protective measures may assist in ensuring that any residual electrostatic charge remaining on the microphone plug contact 210 can be dissipated by the ESD circuit 34 ( FIG. 1 ), along with any charge that builds up on the external microphone in use.
  • the audio signal ground 10 is distinct from the system ground 8.
  • the audio signal ground 10 is insulated from the system ground 8 and filtered for noise, thereby preventing artifacts from being introduced into the audio signals by ground loops or other interference effects, such as electromagnetic induction (EMI) effects.
  • EMI electromagnetic induction
  • the sleeve corresponding here to the ESD plug contact 212, serves to ground the plug 202.
  • the microphone plug contact 210 is electrically connected with the ESD plug contact 212 when the plug is inserted, the microphone plug contact 210 and the ESD plug contact 212 may be interchangeable for some applications. Thus, their positions can be switched in some embodiments, with the sleeve being used to carry microphone signals.
  • FIG. 5 shows one example of an electronic device 300 having an audio jack 2 as described above.
  • the device 300 is enclosed in a case 6.
  • the audio jack 2 is arranged such that the opening 4 registers with a corresponding opening in the case 6 permitting insertion of an audio plug into the jack 2.
  • the system ground 8 of the device 300 connects to the ESD circuit 34.
  • the case 6 may also be grounded.
  • the electronic device 300 includes an audio subsystem 302 and a power source 304.
  • the audio subsystem 302 is typically a tangible component that may comprise for example circuitry and a processor configured to process audio signals.
  • the audio subsystem 302 generates speaker signals 12, 14 and receives microphone signal 16.
  • the audio subsystem 302 is connected to the audio signal ground 10.
  • the device 300 also includes a built-in speaker 306 and microphone 308, which may be used by the audio subsystem 302 as an alternative or in addition to any external microphones, earpieces, or speakers plugged into the jack 2.
  • the audio subsystem 302 receives the plug-detect signal 18 from the audio jack 2.
  • the power source 304 provides power to the speaker 306, microphone 308, and audio subsystem 302.
  • the power source 304 is also connected to the signal ground 10.
  • the plug-detect signal 18 is equivalent to the output of the left speaker amplifier 36.
  • This signal can indicate to the device 300 that the user is not using an earpiece or other external speaker and/or microphone, which may change the behavior of one or more operations of the device 300.
  • the plug-detect signal 18 can be propagated to the built-in speaker 306 of the device 300, or a phone-call application of the device 300 may employ the built-in speaker 306 and microphone 308 for telephone communications instead of using an external microphone and earpiece unit.
  • the plug 202 FIG. 2
  • the device 300 may switch to using the plugged-in external microphone, speakers, and/or earpiece instead of any built-in microphone 308 or speaker 306 components.
  • the device 300 is a mobile electronic device having a processor, a memory, a rigid plastic case, a visual display, and user input devices, such as a keyboard, trackball, scrollwheel, and/or touchscreen.
  • the processor may execute various software applications stored in memory, such as a phone application, a media application, a gaming application or others. The operations of these applications may be affected by the state of the plug-detect signal 18: for example, a phone application may switch between using the external microphone and earpiece and the built-in microphone 308 and speaker 306 during a phone call depending on the state of the plug-detect signal 18.
  • the device 300 may have configuration settings allowing a user to set the behavior of one or more applications of the device 300 depending on the state of the plug-detect signal 18.
EP10188508.5A 2010-10-22 2010-10-22 Audio jack with ESD protection Active EP2445062B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP10188508.5A EP2445062B1 (en) 2010-10-22 2010-10-22 Audio jack with ESD protection
EP14188863.6A EP2830166B1 (en) 2010-10-22 2010-10-22 Audio jack with ESD protection
MX2011009865A MX2011009865A (es) 2010-10-22 2011-09-20 Entrada de audio con proteccion esd.
JP2011206537A JP5409736B2 (ja) 2010-10-22 2011-09-21 Ｅｓｄ保護を有する音声ジャック
CN201110282818.3A CN102457786B (zh) 2010-10-22 2011-09-22 带有esd保护的音频插孔及设备
KR1020110095928A KR101205581B1 (ko) 2010-10-22 2011-09-22 Ｅｓｄ 보호 기능을 갖는 오디오 잭
CA2753084A CA2753084C (en) 2010-10-22 2011-09-22 Audio jack with esd protection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10188508.5A EP2445062B1 (en) 2010-10-22 2010-10-22 Audio jack with ESD protection

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP14188863.6A Division EP2830166B1 (en) 2010-10-22 2010-10-22 Audio jack with ESD protection
EP14188863.6A Division-Into EP2830166B1 (en) 2010-10-22 2010-10-22 Audio jack with ESD protection

Publications (2)

Publication Number Publication Date
EP2445062A1 EP2445062A1 (en) 2012-04-25
EP2445062B1 true EP2445062B1 (en) 2015-12-23

Family

ID=43639849

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10188508.5A Active EP2445062B1 (en) 2010-10-22 2010-10-22 Audio jack with ESD protection
EP14188863.6A Active EP2830166B1 (en) 2010-10-22 2010-10-22 Audio jack with ESD protection

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP14188863.6A Active EP2830166B1 (en) 2010-10-22 2010-10-22 Audio jack with ESD protection

Country Status (6)

Country Link
EP (2) EP2445062B1 (zh)
JP (1) JP5409736B2 (zh)
KR (1) KR101205581B1 (zh)
CN (1) CN102457786B (zh)
CA (1) CA2753084C (zh)
MX (1) MX2011009865A (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102904117B (zh) * 2012-09-27 2015-02-04 珠海德百祺科技有限公司 耳机插座
KR102339834B1 (ko) 2015-05-29 2021-12-16 한국단자공업 주식회사 Ｅｓｄ를 고려한 오디오 커넥터 모듈
US10938166B2 (en) 2017-02-10 2021-03-02 Sentinel Connector Systems, Inc. Switched power over ethernet connector
EP3580818A4 (en) * 2017-02-10 2020-11-11 Sentinel Connector Systems, Inc. SWITCHED ETHERNET POWER CONNECTOR
CN113395635A (zh) * 2021-05-12 2021-09-14 深圳市天视通视觉有限公司 一种耳机接口电路及终端

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2589703B2 (ja) * 1987-09-14 1997-03-12 松下電器産業株式会社 接続装置
US5266042A (en) * 1992-08-31 1993-11-30 Eastern Research, Inc. Electrical jack and patch plug assembly
JPH1032057A (ja) * 1996-07-15 1998-02-03 Oki Electric Ind Co Ltd ヘッドセット用ジャック構造
JP4505424B2 (ja) * 2006-03-17 2010-07-21 ホシデン株式会社 ジャック
US7789697B2 (en) * 2007-06-11 2010-09-07 Apple Inc. Plug detection mechanisms
JP4806692B2 (ja) * 2008-03-24 2011-11-02 ホシデン株式会社 ジャック

Also Published As

Publication number Publication date
MX2011009865A (es) 2012-04-23
CN102457786B (zh) 2014-09-17
JP2012094496A (ja) 2012-05-17
EP2830166A3 (en) 2015-03-25
CA2753084C (en) 2014-07-22
KR101205581B1 (ko) 2012-11-27
CA2753084A1 (en) 2012-04-22
EP2830166A2 (en) 2015-01-28
CN102457786A (zh) 2012-05-16
JP5409736B2 (ja) 2014-02-05
EP2830166B1 (en) 2019-02-06
EP2445062A1 (en) 2012-04-25
KR20120042647A (ko) 2012-05-03

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