CN102035110B

CN102035110B - Audio jack with EMI shielding

Info

Publication number: CN102035110B
Application number: CN201010512659.7A
Authority: CN
Inventors: 卡斯滕·塔姆; 沃尔夫冈·埃德尔伦
Original assignee: Research in Motion Ltd
Current assignee: BlackBerry Ltd
Priority date: 2009-10-05
Filing date: 2010-10-08
Publication date: 2013-06-26
Anticipated expiration: 2030-10-08
Also published as: CA2716093A1; CA2716093C; EP2309602B1; ATE544199T1; EP2309602A1; CN102035110A

Abstract

An audio jack for an audio plug for use in an electrical device, comprising a non-conductive enclosure having a front side and defining a cavity having an aperture within the front side for receiving the audio plug, the aperture having a first diameter, the cavity extending along a longitudinal axis; a conductive shielding formed from sheet metal folded over at least five sides of the enclosure including the front side, the shielding defining a shielding aperture centered on the enclosure aperture and having a second diameter larger than the first diameter; and a ground contact connected to the conductive shielding.

Description

Audio sockets with EMI screening arrangement

Technical field

The application relates to the electromagnetic screen for electronic installation.More specifically, the application discloses a kind of for shielding audio sockets to prevent the equipment of electromagnetic interference and static discharge.

Background technology

Electronic installation has the electric input and output that are carried on cable usually, and described cable can be connected to this device by connector.The signal of telecommunication that flows through these connectors is easy to disturb (EMI) and static discharges with other operation of installing or with other operation mutual electromagnetic from the outside of this device.EMI effect from cable and the connector that is connected to integrated circuit may be apparent in view, and may disturb with radio communication and audio frequency apparatus.Therefore, the producer who has an integrated circuit (IC) apparatus of attachable cable need to reduce the EMI effect of the electric connector in the electronic installation that comprises integrated circuit.

Description of drawings

Fig. 1 is the perspective view of exemplary embodiment with audio sockets of EMI screening arrangement;

Fig. 2 illustrates the perspective view of two different azimuth of two exemplary embodiments that Fig. 1 is shown;

Fig. 3 is mounted in the perspective view of the exemplary embodiment of the Fig. 1 on the printed circuit board (PCB) of exemplary electronic installation;

Fig. 4 is the partial sectional view with exemplary electronic device of the exemplary embodiment that is arranged on Fig. 1 wherein;

Fig. 5 is the cutaway view of exemplary embodiment that is installed in exemplary electronic installation and has Fig. 1 of insertion exemplary socket wherein, and this section is by the vertical plane intercepting along the longitudinal axis in audio sockets chamber.

Summary of the invention

In first aspect, the application relates to a kind of audio sockets of the audio jack for being used in electronic installation, comprise the nonconducting shell that has leading flank and limit the chamber, described chamber has the hole that is used for the audio reception plug that is arranged in leading flank, this hole has the first diameter, and this chamber is Axis Extension longitudinally; By the conductive shield device that the sheet metal that bends at least five sides that comprise leading flank of shell forms, screening arrangement limits the screening arrangement hole centered by the hole of shell, and the screening arrangement hole has the Second bobbin diameter greater than the first diameter; Be connected to the earthing contact of the screening arrangement of conduction.

Audio sockets also comprises the nonconducting stopper element that extends from the surface of shell, the longitudinal axis that nonconducting stopper element is substantially perpendicular to the chamber extends, and be suitable in abutting connection with complementary surface, thus with on audio sockets longitudinally any power of axis be passed to complementary surface.Further, the close screening arrangement of earthing contact hole is connected to the conductive shield device.

Further, earthing contact comprises resilient contact.

Further, the application relates to contact, one or more chamber, and the contact, chamber is arranged in the chamber, to be connected with the surface electrical of one or more conductions of the audio jack that is inserted into.

Further, the application relates to one or more PCB resilient contacts that are suitable for being connected to wire and are electrically connected to wire.

Further, the application relates to one or more be suitable for the being connected to wire of printed circuit board (PCB) and the PCB resilient contacts that are electrically connected to the wire of printed circuit board (PCB), and each PCB resilient contact is electrically connected to contact, one or more chamber.

Further, the application relates to a kind of electronic installation that audio sockets is housed, and comprises nonconducting casing of rigidity, and it limits box body hole centered by the hole of shell and box body hole and has diameter less than Second bobbin diameter.

Further, the diameter of box body hole is basically identical with the first diameter.

Further, the application relates to a kind of electronic installation that audio sockets is housed, and comprises nonconducting casing of rigidity, and it limits the hole centered by the hole of shell and has diameter less than Second bobbin diameter; Audio subsystem with left boombox signal output part, right boombox signal output part and microphone signal input; Have the left boombox wire that is connected with the left boombox signal output part of audio subsystem, the printed circuit board (PCB) of the right boombox wire that is connected with the right boombox signal output part of audio subsystem and the microphone conductor that is connected with the microphone signal input of audio subsystem, left boombox wire, right boombox wire, microphone conductor are positioned as when audio sockets is installed on printed circuit board (PCB), and each all contacts with one or more PCB contact of audio sockets.

Further, the contact, chamber of audio sockets comprises and the contact, microphone chamber that is positioned as the PCB contact connection that is connected with the microphone conductor of printed circuit board (PCB); With the right speaker chambers contact that is positioned as the PCB contact connection that is connected with the right speaker wire of printed circuit board (PCB); With with the contact, left speaker chamber that is positioned as the PCB contact that is connected with the left speaker wire of printed circuit board (PCB) and connects.

Further, the application relates to a kind of system earth device; Printed circuit board (PCB) also comprises and is connected with the system earth device and is positioned as the system earth wire that is connected with one or more PCB contact of audio sockets; The contact, chamber also comprises and the contact, system earth chamber that is positioned as the PCB contact connection that is connected with the system earth wire of printed circuit board (PCB).

Further, contact, microphone chamber, contact, system earth chamber, right speaker chambers contact and contact, left speaker chamber are arranged to the end in chamber in turn from the hole of shell.

Further, the application relates to a kind of electronic installation that audio sockets is housed, and comprises nonconducting casing of rigidity, and it limits box body hole centered by the hole of shell and box body hole and has diameter less than Second bobbin diameter; Be positioned as in abutting connection with nonconducting member and complementary and absorb on audio sockets the longitudinally stop surfaces of any power of axis with nonconducting stopper element (208).

Embodiment

The application has described a kind of audio sockets with screening arrangement of opposing electromagnetic interference (EMI).

Fig. 1 and 2 illustrates the exemplary embodiment of the audio sockets with EMI screening arrangement.In this embodiment, socket comprises two obvious pieces: the conductive shield device 100 that basically encapsulates nonconducting shell 200.

Shell 200 is formed by the non electrically conductive material of for example duroplasts.In this embodiment, shell 200 is formed by single piece of plastic.It is the prism with substantial rectangular of angled front surface.Shell 200 limits the chamber 202 that is shaped as the hollow of holding electric connector (the namely audio jack of TRS (" tip-ring-sleeve ") or TRRS (" tip-ring-ring-sleeve ") kind).The shape in chamber 202 basically with the shape complementarity of audio jack, and the front surface limiting hole 204 of shell 200, plug can be along the chamber 202 longitudinal axis 230 insert chamber 202 by this hole.The elliptical shape in this hole 204 is set to along the chamber 202 longitudinal axis 230 and observes, the circular contour that it provides and the diameter of corresponding audio jack is fully corresponding.

In chamber 202, one or more electric contacts are designed to be electrically connected to corresponding contact on the plug that is inserted into; Top contact in these contacts is shown as the first contact, chamber 210 in Fig. 2.These contacts, chamber extend in the resilient contact on the surface that is suitable for being connected to the printed circuit board (PCB) (PCB) that socket is installed in device wherein.In this embodiment, five such resilient contacts are illustrated, and comprise a PCB resilient contact 218, the 2nd PCB resilient contact 220, the 3rd PCB resilient contact 222, the 4th PCB resilient contact 224 and the 5th PCB resilient contact 226.Each in these resilient contacts can be the extension of contact, one or more chamber, for example extension of the first contact, chamber 210, and contact, single chamber can extend to more than in a resilient contact.Selectively, one or more such resilient contacts can be the extensions of the electric parts in shell 200, rather than the extension in one of contact, chamber.

Screening arrangement 100 is formed by electric conducting material, for example copper, gold or other metals, and it works to stop EMI.Screening arrangement 100 has five surfaces of five sides of package casing 200 basically.Here specify with reference to their common orientation in Fig. 1 on these surfaces: basal surface 102, rear surface 104, front surface 106, left surface 108 and right surperficial 110.The top of shell 200 (orientation of Fig. 1 provides) exposes at least in part, and it illustrates the non electrically conductive material that forms shell 200.Screening arrangement 100 is formed by single sheet of conductive material in this embodiment, and it is stamped into specific shape, is then bent and press pleat to form final shape.The slotted eye 114 that the front surface 106 of screening arrangement 100 limits greater than the diameter of corresponding audio jack.This elliptical shape is less times greater than the shape in the hole 204 of shell, stays little gap between the circumference in the hole 204 of the inside circumference in screening arrangement hole 114 and shell, prevents that thus the plug and the screening arrangement 100 that are inserted into from electrically contacting.Be understandable that, although chamber 202 is columniform basically,

hole

204 and 114 is because angled front surface 106 presents ellipse.

The basal surface 102 of screening arrangement 100 limits the mechanical stop pin 208 of shell 200 by its opening that stretches out.The front surface 106 of screening arrangement 100 partly is fixed to shell 200 by clip 116, and this clip extends around the turning between the front and top surface of shell 200.

Screening arrangement 100 additionally is included in the ground connection resilient contact 112 that extends from screening arrangement 100 near the position in the front surface 106 of screening arrangement 100 and screening arrangement hole 114.Ground connection resilient contact 112 is suitable for being connected to the ground plane that socket is mounted the PCB on it, makes thus screening arrangement 100 be grounded to system earth device in cryopreservation device.Ground connection resilient contact 112 makes near front surface 106 and screening arrangement hole 114 static that forms on due to plug and from the plug that is inserted into, emits the interference effect that produces the process of spark and minimize: by the gap between the hole 204 at screening arrangement hole 114 and shell, emit spark and any plug during electrostatic charge is released to screening arrangement 100 will not produce under the prerequisite of electric current of the length by screening arrangement 100 and make at once electric charge be connected to the system earth device by ground connection resilient contact 112 in discharge process.In addition, single ground connection resilient contact 112 replaces the use of a plurality of such contacts to reduce ground loop in screening arrangement 100 and the risk of other undesirable electric product.

Fig. 3 illustrates the exemplary embodiment of the audio sockets on the PCB that is installed in exemplary electronic installation 302 in Fig. 1 and 2.Ground connection resilient contact 112 is shown as with the ground plane of PCB 302 and contacts, and a plurality of PCB resilient contact 218,220,222,224 with are connected (invisible) also be connected with a plurality of wires of PCB 302.Here, the basal surface 102 of screening arrangement 100 is visible, and the mechanical stop pin 208 of shell 200 protrudes upward.The second contact, chamber 212 is here visible, deeper is arranged in the chamber than the first contact, chamber 210.

Fig. 4 illustrates the exemplary audio socket in the exemplary electronic installation of being installed in of Fig. 1-3 300, and it has the parts than the device 300 that more is arranged in suitable position in Fig. 3.Here, the part of the external box of microvave 306 of device is shown as the front surface 106 that covers screening arrangement 100 and limits and has the box body hole 308 of observing the section profile identical with the hole 204 of shell along the longitudinal axis 230 of outer shell cavity 202.Coupling between the hole 204 of box body hole 308 and shell guarantees that the plug that is inserted into can not contact with screening arrangement 100, and screening arrangement has on circumference both holes 114 greater than other.Therefore, between the plug that is inserted into and screening arrangement 100, only electrical connection will be the result of the spark of emitting of the gap location between the edge in plug surface and screening arrangement hole 114.

Fig. 5 is illustrated in the profile of outer shell cavity 202 of exemplary audio socket of situation figure below 1-4 of exemplary electronic installation 300.Socket here be shown as its basal surface 102 towards under, device 300 PCB 302 is positioned on the top surface of shell 200.The 4th PCB resilient contact 224 is shown as with PCB 302 and contacts.The clip 116 that the front surface 106 of screening arrangement 100 is remained to shell 200 is shown in the turning bent around of shell 200.Consistency between the size of the gap between the hole 204 of screening arrangement hole 114 and shell and the hole 204 of shell and box body hole 308 also presents in this view.A plurality of parts of casing 306 packaging systems 300 of the device that is formed by the non electrically conductive material of for example duroplasts.

Exemplary audio jack 400 also here is shown as inserts outer shell cavity 202.Audio jack 400 is TRRS types, its have by shading ring separate elongated cylindrical, to form four independent contacts (tip, ring, ring and sleeve).The contact of the base portion 418 of the most close plug 400 is plug sleeve contacts 410.This separates from the second plug contacts 408 of conducting ring shape by the first shading ring 416, the second plug contacts 408 again by the second shading ring 414 from be also that the 3rd plug contacts 406 of annular is separated, the 3rd plug contacts 406 is finally by plug tip contact 404 separation of the 3rd shading ring 412 from the end 402 that is positioned at plug 400.In the exemplary embodiment of the audio sockets of describing in the above, when plug 400 was inserted in chamber 202 fully, plug sleeve contact 410 was electrically connected to the first contact, chamber 210, and the second plug contacts 408 is electrically connected to the second contact, chamber 212.The 3rd plug contacts 406 and plug tip contact 404 also are electrically connected to the 3rd contact, chamber and end chamber contact (not shown) respectively.

To be audio sockets remain on mechanism in suitable position in the housing of device 300 by it to the further feature of the audio sockets shown in Fig. 5.Shell 200 has the mechanical stop pin 208 that stretches out by the opening in the basal surface 102 of screening arrangement 100, with socket fixing in position in, and stop the longitudinal force of the plug 400 that inserts from 202 the longitudinal axis 230 along the chamber.This latch 208 concurs with the rear end, inclined-plane 206 that has with the chamber 202 of the shape of most advanced and sophisticated 402 complementations of plug.When the tip 402 of plug 400 contacts with the rear end 206 in chamber 202, absorbed by the fixing latch 208 in position of the complementary stop surfaces 304 of device 300 along any further insertion force of the longitudinal axis 230 in chamber 202.

This stop mechanism has dual purpose.At first, it prevents that any power is passed to the rear surface 310 that socket is positioned at device case wherein.This is for preventing that infringement or wearing and tearing near the parts the rear surface 310 that is positioned at housing from may be important.Especially, rear surface 310 can be the integral part of another parts of the device 300 that quilt is degenerated due to the contact force that repeats.For example, these parts can be housing packing ring or other the potted component that may be removed or damage due to the impact force that repeats.The second, stop mechanism allows to keep little gap between the base portion 418 of the outer surface of device box 306 and plug 400.In this exemplary embodiment, plug 400 has the base portion 418 that is wider than its sleeve; In the situation that stop mechanism is not positioned at suitable position, plug may be inserted into the direct degree that contacts with device box 306 of base portion 418 that makes plug 400.This may and/or install at plug 400 has harmful effect on 300, still, stay the infringement that little gap can produce tolerance and prevent from producing due to the contact between these two surfaces between them.

Many audio connectors comprise the nonconducting stretcher that surrounds plug hole and extend to the outside of device box.The exemplary embodiment of above-described audio sockets and the difference of this design are there is no stretcher, and except the inside in chamber 202, and there is no other socket part is visible from installing 300 outside.This be box body hole 308 circumference basically with the result of the circumference coupling in the hole 204 of shell, do not stay the gap for the insertion of stretcher.On the contrary, the thickness of device box 300 is realized the function identical with nonconducting stretcher basically, and makes whole audio sockets assembly have than the short length of typical extension audio sockets.

In certain embodiments, different plug contacts can be carried a plurality of audio signals, comprises loudspeaker signal and microphone signal.For example, plug tip contact 404 can receive the left boombox signal that transmits from the chamber terminal contacts, and this signal is from the PCB resilient contact again, and for example the 4th PCB resilient contact 224 transmits.On the PCB 302 that the 4th PCB resilient contact 224 in such embodiments will be installed in left boombox wire on PCB 302 is connected, receive left boombox signal from installing 300 audio subsystem thus.Based on same reason, the 3rd plug contacts 406 can be carried right boombox signal, and this signal can transmit by the 3rd contact, chamber with from the 3rd PCB resilient contact 222 of the right boombox wire on PCB 302.The second plug contacts 408 in such embodiments can play earthing contact, plug 400 is connected to the system earth device by the second contact, chamber 212 and the 2nd PCB resilient contact 220 or is used for the independent audio frequency earthing device of device 300.Plug sleeve contact 410 can be carried microphone signal and is sent to a PCB resilient contact 218 by the first contact, chamber 210, and therefore is sent to the microphone signal wire on PCB 302, thereby is provided in the audio subsystem of device 300.In such embodiments, some additional purpose also can be played in the first contact, chamber 210, for example is connected by the electrostatic discharge (ESD) protection parts with device 300 to prevent static discharge.Optionally, the effect of contact, a plurality of chamber and PCB resilient contact can rearrange according to the rule of using in device 300 and plug 400.

In certain embodiments, the contact, chamber can be placed as and prevent when plug 400 is fully inserted into, and plug sleeve contact 410 is electrically connected to contact, any chamber.The first contact, chamber 210 can be electrically connected to the second plug contacts 408 rather than plug sleeve contact 410, and correspondingly, other contact, chamber also can be electrically connected to from different plug contacts.

Some embodiment can use a PCB resilient contact to transmit non-audio signals, for example the signal that is inserted into of indicating plug.Optionally, one or more PCB resilient contacts can be used to plug earthed and/or one or more contacts of plug sleeve are connected to the additional electric parts of PCB, for example electrostatic discharging element.In certain embodiments, one or more PCB resilient contacts can integrally form with screening arrangement 100, perhaps can be electrically connected to screening arrangement 100, adopt thus the ground connection resilient contact 112 of screening arrangement 100 to make any element ground connection that is connected with the PCB resilient contact.Will be further appreciated that a plurality of resilient contacts, comprise that ground connection resilient contact 112 can take different forms in other embodiments, for example be suitable for being soldered to the pin of printed circuit board (PCB).

In an alternative embodiment, socket is not audio sockets, but is used for the screening can of the electric connector of the one or more simulations of carrying of some other type and/or digital signal.

In further alternative embodiment, mechanical stop pin 208 can have the shape different from pin, and can contact with the complementary structure of device 300, so that socket is fixing in position.Other stopping element that different embodiment can have mechanical stop pin 208 or stretch out from the different surfaces of audio sockets.In certain embodiments, stopping element can be formed by the independent piece of the material of shell.

A plurality of embodiment that the above proposes are only examples, and do not mean that the restriction scope of disclosure.The variation of invention described herein is that apparent, such variation is in the scope of the application's expection for a person skilled in the art.Especially, the feature of above-described one or more embodiment can be selected as producing the alternative embodiment by minute combination (sub-combination) formation of the feature of clearly not describing in the above.In addition, the feature of above-described one or more embodiment can be selected and make up to produce the alternative embodiment that constitutes by the feature of clearly not describing in the above.When the application was looked back as a whole, the feature that is suitable for such combination and minute combination (sub-combination) was very apparent for a person skilled in the art.Themes described herein and in claims of quoting are attempted to cover and are comprised technical all suitable changes.

Claims

1. audio sockets that is used in the audio jack of electronic installation comprises:

Have leading flank and limit nonconducting shell (200) in chamber (202), described chamber has the hole (204) that is used for the audio reception plug that is arranged in leading flank, this hole (204) has the first diameter, and extend this chamber (202) longitudinally axis (230);

The conductive shield device (100) that is formed by the sheet metal that bends at least five sides that comprise leading flank of shell (200), described conductive shield device (100) limits the screening arrangement hole (114) centered by the hole (204) of shell, and screening arrangement hole (114) has the Second bobbin diameter greater than the first diameter; With

Be connected to the earthing contact (122) of described conductive shield device; With

The nonconducting stopper element (208) that extends from the surface of described shell (200), the longitudinal axis (230) that described nonconducting stopper element (208) is substantially perpendicular to described chamber (202) extends, and be suitable in abutting connection with complementary surface (304), thus with on audio sockets longitudinally any power of axis (230) be passed to the surface (304) of described complementation, stay little gap between the circumference in the hole (204) of the inside circumference in screening arrangement hole (114) and shell.

2. audio sockets as claimed in claim 1, wherein, described earthing contact (112) is connected to conductive shield device (100) near screening arrangement hole (114).

3. audio sockets as claimed in claim 2, wherein, described earthing contact (112) comprises resilient contact.

4. audio sockets as claimed in claim 1, also comprise contact, one or more chamber (210,212), and contact, chamber (210,212) are arranged in the chamber, to be connected with the surface electrical of one or more conductions of the audio jack that is inserted into.

5. audio sockets as claimed in claim 4 also comprises one or more PCB contacts that are suitable for being connected to the wire of printed circuit board (PCB) and are electrically connected to the wire of printed circuit board (PCB) (218,220,222,224,226), each PCB contact is electrically connected to contact, one or more chamber.

6. electronic installation (300) that comprises audio sockets as claimed in claim 1, the nonconducting casing (306) that comprises rigidity, it limits box body hole (308) centered by the hole of shell and box body hole (308) and has diameter less than Second bobbin diameter.

7. electronic installation as claimed in claim 6, wherein, the diameter of box body hole (308) is basically identical with the first diameter.

8. electronic installation as claimed in claim 6 (300) also comprises:

Audio subsystem with left boombox signal output part, right boombox signal output part, microphone signal input and audio frequency earthing device; With

Printed circuit board (PCB) with the left boombox wire that is connected with the left boombox signal output part of audio subsystem, the right boombox wire that is connected with the right boombox signal output part of audio subsystem, the microphone conductor that is connected with the microphone signal input of audio subsystem and the audio frequency earth lead that is connected with the audio frequency earthing device

Left boombox wire, right boombox wire, microphone conductor and audio frequency earth lead are positioned as when audio sockets is installed on printed circuit board (PCB), each all with the PCB contact of audio sockets in one or more the contact.

9. electronic installation as claimed in claim 8, wherein, the contact, chamber of audio sockets comprises:

With the contact, microphone chamber that is positioned as the PCB contact connection that is connected with the microphone conductor of printed circuit board (PCB) (302);

With the right speaker chambers contact that is positioned as the PCB contact connection that is connected with the right speaker wire of printed circuit board (PCB) (302);

With the contact, left speaker chamber that is positioned as the PCB contact connection that is connected with the left speaker wire of printed circuit board (PCB) (302); With

With the audio frequency grounded chamber contact that is positioned as the PCB contact connection that is connected with the audio frequency earth lead of printed circuit board (PCB) (302).

10. electronic installation as claimed in claim 9, wherein, contact, microphone chamber, audio frequency grounded chamber contact, right speaker chambers contact and contact, left speaker chamber from the hole (114) of shell to the chamber end of (202) arrange in turn.

11. an electronic installation (300) that comprises audio sockets as claimed in claim 1 comprising:

Nonconducting casing (306) of rigidity, it limits box body hole (308) centered by the hole (114) of shell and box body hole (308) and has diameter less than Second bobbin diameter; With

Be positioned as in abutting connection with nonconducting stopper element (208) and complementary and absorb on audio sockets the longitudinally stop surfaces (304) of any power of axis (230) with nonconducting stopper element (208).