|Publication number||US3587029 A|
|Publication date||Jun 22, 1971|
|Filing date||Dec 4, 1969|
|Priority date||Dec 4, 1969|
|Publication number||US 3587029 A, US 3587029A, US-A-3587029, US3587029 A, US3587029A|
|Inventors||Knowles Robert F|
|Original Assignee||Litton Precision Prod Inc|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (96), Classifications (11)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent Robert F. Knowles 5/1967 Spera 3,399,372 8/1968 Uberbacher Primary Examiner-Stephen .l. Novosad Assistant Examiner -Robert A. Hafer AtlorneysEarl R. Evans, Alan C. Rose and Alfred B. Levine ABSTRACT: An RF connector for printed circuit boards, strip line cards, printed circuit cables and the like, particularly for micro-system packaging. The connector is adapted to be mounted on a baseboard or strip line card provided with a ground plane. A copper shield is mounted on the body of the v v connector with individual insulated tabs or fingers and one or moreuninsulated tabs or fingers inserted behind the contacts of the connector. The lower edge of the shield is attached to a ground contact or directly to the baseboard or card. The impedance of a signal circuit can be varied by varying the length of the insulated tab that is in close proximity to the signal contact. Preferably the shield is provided with an insulating coating on one side so that electrical contact can be made with a ground contactof the connector by merely folding over the tip end of the grounding tab.
RF CONNECTOR BACKGROUND OF THE INVENTION The invention pertains to a conductive shield for a multicontact electrical connector which provides reduced spacing of the signal and ground contacts both in the connector and on the baseboard or strip line card on which the connector is mounted. Hitherto the physical separation of conflicting contacts has been wasteful of contact positions both on the connector and the cooperating motherboard or car.
SUMMARY OF THE INVENTION The invention relates to an improved edgeboard connector for printed circuit boards and the like and designed to economize on space, particularly in the use of microminiature components. The connector comprises one or two rows of interspaced signal and ground contact members disposed in a recess in the connector body and adapted to make contact with the terminals of the plug-in board when the board is inserted in the recess. The connector preferably is designed to be dip soldered to a baseboard or motherboard or to a ground plane, for example on a strip line card.
A metallic conductive shield on the outside of the body of the connector is provided with insulated and uninsulated tabs or fingers extending into the recess in the connector and adapted to make contact with the respective contact members. The grounded shield is provided with a thin insulating coating on one surface thereof to provide insulation between the shield and signal contacts but permit electrical contact with a ground contact member, for example by folding the tip end of the tab or finger to expose the uninsulated surface at that point. The length of the insulated tabs or fingers may be altered to vary the impedance of the signal circuit through the adjacent contact member.
In general terms the object of the invention is to provide a compact and effective arrangement for shielding the connector contact members, providing a path for current flow from the ground contact or contacts and for impedance matching.
Another object of the invention is to simplify the shield and grounding functions in a small or miniature connector and facilitate the electrical connections to a baseboard or other component associated with the connector.
A still further object of the invention is to obtain impedance matching with a signal cable or the like through the contact members of the connector.
BRIEF DESCRIPTION OF THE DRAWING In the drawing, FIG. 1 is a partial perspective view to an enlarged scale of a connector embodying the invention mounted on a baseboard or associated circuit component;
FIG. 2 is a sectional view of the connector taken on the line 2-2 ofFlG. l; and
FIG. 3 is a detailed view of the insulating copper shield.
DESCRIPTION OF THE PREFERRED EMBODIMENT The illustrative embodiment of the invention shown in FIGS. 1 and 2 of the drawing is a miniature edgeboard electrical connector provided with a double row of contact members disposed in a recess in the connector body in position to engage the terminal contacts 11 of a printed circuit board or similar circuit component 12. As shown, the connector 10 is mounted on a baseboard or panel 15 having spaced terminals 16 to which the terminals 17 of the contact members are so]- dered. The general construction of the connector and cooperating circuit components is conventional and may be modified for use with other types of circuit boards or with strip line cards or flexible printed circuit cables, as well known to those skilled in the art. In accordance with the invention, a novel metallic grounding shield 20 is provided on one or both of the outer surfaces of the insulating connector body 21.
As shown by way of example, the resilient contact members 23 and 24 of the connector 10 each comprises an arcuate con tact section 25 (see FIG. 2) integral with the terminal portion 17, the latter being square in cross section so that the contact members are locked in place by twisting the ends of the terminals as indicated'at 26. The terminal portion of the contact members may be straight as shown for the contact member 23 or may be deformed as indicated at 28 on the contact member 24 in order to locate adjacent terminals in staggered relation if desired.
The metallic shield 20, as shown, consists of a copper plate or fiat section on the outside of the connector body with integral fingers or tabs 30 extending into the recess in a position to engage the outer portions of the contact members 23 and 24. One surface of the shield 30 is coated with a thin durable adhesive insulating coating as shown more clearly in FIG. 3. After the fingers 30 are formed in the sheet stock by a punching operation, the sheet is folded to provide opposed fingers and skirt section 31 of the required dimensions. In the construction shown by way of example, the contact members 23 and 24 from an array of interspersed ground and signal contacts. The finger 30 associated with one of the contact members 23 has the tip end 300 thereof folded to expose the uninsulated surface and make electrical contact with a ground contact member. The lower end of the shield 20 is soldered to the contact terminal as shown at the point 32 and to the ground plane of the baseboard I5 at the point 33. The insulated finger or tab 30 associated with signal contacts 23, 24 does not make electrically conductive contact with said contacts. The terminal portion of a signal contact 24 is shown as soldered to a signal element of the circuit component 15 at the point 34. The shield 20 may also be provided with an integral tab 35 to form a ground lead for the shield.
When used in an RF connector where impedance matching with a printed circuit cable is desired, the length of the insulated fingers or tabs 30 associated with signal contacts may be altered to effect this result, which is an important feature for many applications.
A thin insulating coating on the tabs provides the desired close spacing between the shield 20 and the signal contact.
It will be apparent that the invention provides a compact and effective construction for shielding and grounding the contact members of a small edgeboard connector, which can be readily adapted for use with printed circuit board and cables strip line cards and similar circuit components.
It avoids the requirement for physical separation of the conflicting signal and ground contacts along the length of the connector, which is wasteful of contact positions both on the connector and on the motherboard. Furthennore the positioning of the ground contact is not fixed by the shield stamping and the shield embodying the invention is adaptable to different printed circuit boards. Thus special tooling for different contact arrangements is not required.
What I claim is:
I. In an electrical connector comprising an insulating connector body provided with an inner recess adapted to receive a plug-in member and a row of interspersed signal and ground contacts in said recess each having terminal portions projecting from said connector body, the improvement comprising a grounded metallic shield having a main section outside said connector body and integral tabs or fingers extending into said recess in close proximity to said contacts, one of said tabs or fingers being disposed in electrical contact with said ground contact.
2. An electrical connector according to claim 1, in which the grounded shield is provided with an insulating coating on the tabs or fingers adjacent the signal contacts in said recess.
3. An electrical connector according to claim 1, in which said tabs or fingers on the grounded metallic shield are selectively coated with insulation in certain areas to provide conductive contact with some of the connector contacts only.
4. An electrical connector according to claim 1, in which the surface of at least one of said tabs or fingers is disposed in intimate contact with the surface of a signal contact but insulated therefrom.
5. An electrical connector comprising a row of interspaced ground and signal contacts, a metallic ground plate having integral tabs or fingers in physical contact with the respective connector contacts, said tabs or fingers being provided with an insulating coating on the areas where the tabs or fingers engage the signal contacts, and a ground connection for said ground plate.
6. An electrical connector comprising an insulating connector body provided with an inner cavity or recess, a plurality of resilient contact members mounted in said cavity or recess and adapted to cooperate with the terminal contacts of a printed circuit component inserted in said cavity or recess,
said contact members having integral terminal portions projecting from the connector body for mounting the connector on a second circuit component having a ground plane, and a metallic grounding shield on the outside surface of said insulating connecting body and provided with integral tabs or fingers projecting inside said cavity or recess in a position to engage the surface of the respective contact members, said tabs or fingers having an insulating coating on the surface engaging said connector contact members.
7. An electrical connector according to claim 6, in which one of the tabs or fingers is folded over at the tip to make electrical contact with a predetermined one of the contact members.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3746932 *||Dec 28, 1970||Jul 17, 1973||Texas Instruments Inc||Panel board systems and components therefor|
|US3778754 *||Dec 8, 1971||Dec 11, 1973||Yamaichi Electric Mfg||Socket for integrated circuit|
|US3829815 *||Jul 2, 1973||Aug 13, 1974||Appleton Electric Co||Common ground stud module|
|US3865452 *||Aug 1, 1973||Feb 11, 1975||Ind Electronic Hardware Corp||Spark gap protection in cathode ray tube sockets|
|US3871728 *||Nov 30, 1973||Mar 18, 1975||Itt||Matched impedance printed circuit board connector|
|US3989344 *||Dec 26, 1974||Nov 2, 1976||Bunker Ramo Corporation||Two-position contact for printed circuit cards|
|US4080028 *||Dec 9, 1976||Mar 21, 1978||Powell Electrical Manufacturing Company||Printed circuit board connector adapter|
|US4094573 *||Aug 1, 1973||Jun 13, 1978||Elfab Corporation||Circuit board edge connector|
|US4226492 *||Jul 30, 1979||Oct 7, 1980||Bell Telephone Laboratories, Incorporated||Electrical interconnection apparatus|
|US4385795 *||Dec 10, 1980||May 31, 1983||Sumitomo Electric Industries, Ltd.||Connector for flat cable|
|US4457570 *||Dec 10, 1980||Jul 3, 1984||Virginia Patent Development Corporation||Connector for mating modular plug with printed circuit board|
|US4486066 *||Apr 12, 1982||Dec 4, 1984||Minter Jerry B||Connector and clip therefor|
|US4501464 *||Nov 30, 1981||Feb 26, 1985||Virginia Patent Development Corporation||Modular connector with improved housing and contact structure|
|US4544227 *||Aug 19, 1982||Oct 1, 1985||Allied Corporation||Shielded electrical connector|
|US4577921 *||Aug 17, 1984||Mar 25, 1986||Virginia Patent Development Corp.||Modular connector with improved housing and contact structure|
|US4707040 *||Jul 26, 1985||Nov 17, 1987||W. L. Gore & Associates, Inc.||Connector for coaxially shielded cable|
|US4732568 *||Nov 24, 1986||Mar 22, 1988||Virginia Plastics Company||Electrical connector with integral ground strap for shielded cable|
|US4738638 *||Jun 24, 1987||Apr 19, 1988||Virginia Plastics Company||Electrical connector with improved integral ground strap for shielded cable|
|US4747784 *||May 16, 1986||May 31, 1988||Daymarc Corporation||Contactor for integrated circuits|
|US4749357 *||Dec 23, 1985||Jun 7, 1988||Elcon Products International Company||Circuit board connector, bus and system|
|US4756695 *||Aug 21, 1987||Jul 12, 1988||Amp Incorporated||Local area network interface|
|US4776804 *||Feb 5, 1987||Oct 11, 1988||Texas Instruments Incorporated||Circuit board systems, connectors used therein, and methods for making the connectors and systems|
|US4780087 *||Jun 4, 1987||Oct 25, 1988||Tektronix, Inc.||Electrical connector for circuit boards|
|US4801905 *||Apr 23, 1987||Jan 31, 1989||Hewlett-Packard Company||Microstrip shielding system|
|US4812137 *||Nov 25, 1987||Mar 14, 1989||Itt Corporation||Connector with EMI/RFI grounding spring|
|US4846705 *||Mar 25, 1986||Jul 11, 1989||The Grass Valley Group, Inc.||Backplan connector|
|US4866374 *||Feb 2, 1987||Sep 12, 1989||Daymarc Corporation||Contactor assembly for testing integrated circuits|
|US4956604 *||Feb 17, 1989||Sep 11, 1990||Daymarc Corporation||Broad band contactor assembly for testing integrated circuit devices|
|US4959024 *||Oct 5, 1989||Sep 25, 1990||Erni Elektroapparate Gmbh||Shielding device for electric plug connectors|
|US5035631 *||Jun 1, 1990||Jul 30, 1991||Burndy Corporation||Ground shielded bi-level card edge connector|
|US5145401 *||May 28, 1991||Sep 8, 1992||Superior Modular Products, Inc.||Electrical connector having improved spring contacts|
|US5156554 *||Jul 22, 1991||Oct 20, 1992||Itt Corporation||Connector interceptor plate arrangement|
|US5218293 *||Aug 30, 1991||Jun 8, 1993||Kan David T||Passive high-frequency signal probe|
|US5233451 *||Dec 26, 1991||Aug 3, 1993||Seiko Epson Corporation||Liquid crystal display device with chamfered substrate edge|
|US5401185 *||Nov 22, 1993||Mar 28, 1995||Wang; Kuo-Long||Edge connector|
|US5525075 *||Jun 13, 1994||Jun 11, 1996||Murata Manufacturing Co., Ltd.||Coaxial microstripline transducer|
|US5575691 *||May 5, 1995||Nov 19, 1996||Elcon Products International||Apparatus for front or rear extraction of an electrical contact from a connector housing|
|US5807120 *||Mar 6, 1996||Sep 15, 1998||Elcon Products International||Printed circuit board power distribution connector|
|US5839906 *||Sep 28, 1995||Nov 24, 1998||Emc Corporation||Data storage system|
|US5921814 *||Feb 25, 1997||Jul 13, 1999||Molex Incorporated||Shielded board mounted electrical connector|
|US6015304 *||Dec 23, 1996||Jan 18, 2000||Molex Incorporated||Ground-enhanced electrical connector|
|US6217372||Oct 8, 1999||Apr 17, 2001||Tensolite Company||Cable structure with improved grounding termination in the connector|
|US6394839||Apr 10, 2001||May 28, 2002||Tensolite Company||Cable structure with improved grounding termination in the connector|
|US6428344||Jul 31, 2000||Aug 6, 2002||Tensolite Company||Cable structure with improved termination connector|
|US6483720 *||Aug 17, 2000||Nov 19, 2002||International Business Machines Corporation||EMC protection in digital computers|
|US6558195 *||Oct 16, 2000||May 6, 2003||The Whitaker Corporation||Electrical connector for printed circuit boards|
|US6592407 *||Jun 3, 2002||Jul 15, 2003||Hon Hai Precision Ind. Co., Ltd.||High-speed card edge connector|
|US6733310||Nov 22, 2002||May 11, 2004||Molex Incorporated||Electrical connector with improved electrostatic discharge system|
|US6823587||Aug 5, 2002||Nov 30, 2004||Tensolite Company||Method of making a cable structure for data signal transmission|
|US6857899||Dec 19, 2001||Feb 22, 2005||Tensolite Company||Cable structure with improved grounding termination in the connector|
|US7029330 *||Aug 1, 2005||Apr 18, 2006||Uju Electronics Co. Ltd.||Non-grounded electric connector|
|US7121849||Apr 12, 2004||Oct 17, 2006||Samtec, Inc.||Electrical connector having a ground plane with independently configurable contacts|
|US7131867||May 6, 2005||Nov 7, 2006||Pacific Aerospace & Electronics, Inc.||RF connectors having ground springs|
|US7165994 *||Jun 29, 2004||Jan 23, 2007||Samtec, Inc.||Electrical connector having a ground plane with independently configurable contacts|
|US7189090 *||Oct 28, 2005||Mar 13, 2007||Tyco Electronics Amp K.K.||Coupler for flat cables and electrical connector assembly|
|US7229298 *||Jun 27, 2005||Jun 12, 2007||Hon Hai Precision Ind. Co., Ltd.||Electrical connector having an improved grounding path|
|US7311527 *||Oct 13, 2006||Dec 25, 2007||Singatron Enterprise Co., Ltd.||Connector structure|
|US7320623 *||Dec 6, 2006||Jan 22, 2008||Japan Aviation Electronics Industry, Limited||Connector with protection against electrostatic charges accumulated on a mating connector|
|US7815468 *||Jul 17, 2009||Oct 19, 2010||Fujitsu Component Limited||Connector|
|US8376766 *||Aug 16, 2011||Feb 19, 2013||International Business Machines Corporation||Connector with compliant section|
|US9276340||Nov 17, 2014||Mar 1, 2016||Apple Inc.||Interposers for connecting receptacle tongues to printed circuit boards|
|US9350126 *||Nov 15, 2014||May 24, 2016||Foxconn Interconnect Technology Limited||Electrical connector having a receptacle with a shielding plate and a mating plug with metallic side arms|
|US9356370||Mar 7, 2015||May 31, 2016||Apple Inc.||Interposer for connecting a receptacle tongue to a printed circuit board|
|US9450339||Nov 17, 2014||Sep 20, 2016||Apple Inc.||Ground contacts for reduced-length connector inserts|
|US9490581 *||Nov 17, 2014||Nov 8, 2016||Apple Inc.||Connector insert assembly|
|US9490594 *||Dec 3, 2014||Nov 8, 2016||Foxconn Interconnect Technology Limited||Flippable electrical connector|
|US9496657 *||Apr 19, 2016||Nov 15, 2016||Speed Tech Corp.||Electrical connector structure|
|US9515439||Mar 7, 2015||Dec 6, 2016||Apple Inc.||Connector insert assembly|
|US9537263||Nov 17, 2014||Jan 3, 2017||Apple Inc.||Connector receptacle having a shield|
|US9640885||Nov 17, 2014||May 2, 2017||Apple Inc.||Connector receptacle having a tongue|
|US9692183 *||Jan 20, 2015||Jun 27, 2017||Te Connectivity Corporation||Receptacle connector with ground bus|
|US20030104715 *||Dec 2, 2002||Jun 5, 2003||Delta Electronics, Inc.||Signal-transmitting device|
|US20040198083 *||Apr 12, 2004||Oct 7, 2004||Samtec, Inc.||Electrical connector having a ground plane with independently configurable contacts|
|US20040235323 *||Jun 29, 2004||Nov 25, 2004||Samtec, Inc.||Electrical connector having a ground plane with independently configurable contacts|
|US20060094284 *||Oct 28, 2005||May 4, 2006||Masayuki Aizawa||Coupler for flat cables and electrical connector assembly|
|US20060121782 *||Jun 27, 2005||Jun 8, 2006||Hon Hai Precision Ind. Co., Ltd.||Electrical connector having an improved grounding path|
|US20070042619 *||Oct 20, 2006||Feb 22, 2007||Samtec Inc.||Electrical connector having a ground plane with independently configurable contacts|
|US20070128946 *||Dec 6, 2006||Jun 7, 2007||Japan Aviation Electronics Industry, Limited||Connector with protection against electrostatic charges accumulated on a mating connector|
|US20100216347 *||Jul 17, 2009||Aug 26, 2010||Fujitsu Component Limited||Connector|
|US20110059652 *||Sep 10, 2009||Mar 10, 2011||Amphenol Corporation||Multi-pathway connector for circuit boards|
|US20140193992 *||Jan 9, 2014||Jul 10, 2014||Hon Hai Precision Industry Co., Ltd.||Electrical connector having improved shileding plate|
|US20150171561 *||Nov 15, 2014||Jun 18, 2015||Foxconn Interconnect Technology Limited||Flippable electrical connector|
|US20150171574 *||Dec 3, 2014||Jun 18, 2015||Foxconn Interconnect Technology Limited||Flippable electrical connector|
|US20150340813 *||Nov 17, 2014||Nov 26, 2015||Apple Inc.||Connector insert assembly|
|US20160211629 *||Jan 20, 2015||Jul 21, 2016||Tyco Electronics Corporation||Receptacle connector with ground bus|
|CN102683929A *||Jun 6, 2012||Sep 19, 2012||上海雷迪埃电子有限公司||Radio-frequency connector|
|CN102683929B *||Jun 6, 2012||Jun 10, 2015||上海雷迪埃电子有限公司||Radio-frequency connector|
|EP0277430A2 *||Dec 23, 1987||Aug 10, 1988||Texas Instruments Incorporated||Circuit board systems, connectors used therein, and methods for making the connectors and systems|
|EP0277430A3 *||Dec 23, 1987||May 2, 1990||Texas Instruments Incorporated||Circuit board systems, connectors used therein, and methods for making the connectors and systems|
|EP0422807A2 *||Sep 28, 1990||Apr 17, 1991||Itt Industries Inc.||A card connector|
|EP0422807A3 *||Sep 28, 1990||Jun 5, 1991||Itt Industries Inc.||A card connector|
|EP0524358A2 *||Nov 4, 1991||Jan 27, 1993||ITT INDUSTRIES, INC. (a Delaware corporation)||A card connector|
|EP0524358A3 *||Nov 4, 1991||Feb 24, 1993||Itt Industries, Inc.||A card connector|
|EP0800241A2 *||Feb 27, 1997||Oct 8, 1997||Molex Incorporated||Shielded board mounted electrical connector|
|EP0800241A3 *||Feb 27, 1997||Jan 7, 1999||Molex Incorporated||Shielded board mounted electrical connector|
|WO1992022106A1 *||May 27, 1992||Dec 10, 1992||Superior Modular Products, Inc.||Electrical connector having improved spring contacts|
|U.S. Classification||439/607.34, 439/108, 439/516, 439/62, 439/741, 439/514, 439/637|
|International Classification||H01R12/18, H01R12/00|