CA1231147A - Low insertion force circuit board connector assembly - Google Patents
Low insertion force circuit board connector assemblyInfo
- Publication number
- CA1231147A CA1231147A CA000469824A CA469824A CA1231147A CA 1231147 A CA1231147 A CA 1231147A CA 000469824 A CA000469824 A CA 000469824A CA 469824 A CA469824 A CA 469824A CA 1231147 A CA1231147 A CA 1231147A
- Authority
- CA
- Canada
- Prior art keywords
- receptacle
- contacts
- contact
- plug member
- lever
- 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.)
- Expired
Links
Abstract
LOW INSERTION FORCE CIRCUIT BOARD
CONNECTOR ASSEMBLY
ABSTRACT
A low insertion force electrical connector system comprises a receptacle having a plurality of electrical contacts arranged in at least two opposing rows. A low insertion force system selectively spaces apart or closes the electrical contacts to limit insertion of a circuit board with a low force. Devices are provided for aligning and locking the circuit board within the receptacle and an actuating system is arranged to serially operate the aligning and locking devices first followed by the low insertion force system.
CONNECTOR ASSEMBLY
ABSTRACT
A low insertion force electrical connector system comprises a receptacle having a plurality of electrical contacts arranged in at least two opposing rows. A low insertion force system selectively spaces apart or closes the electrical contacts to limit insertion of a circuit board with a low force. Devices are provided for aligning and locking the circuit board within the receptacle and an actuating system is arranged to serially operate the aligning and locking devices first followed by the low insertion force system.
Description
Kiwi No. I~9172A
( BUD 06 I) ION It FORCE CIRCA
WRAP KEYNOTE ASSUME
BA~ÇROT~F TOE INVENTION
The invention herein relates to a circuit 10 board connector system. It it particularly suite for use in computer systems wherein a series of daughter boards are connected to a other boar. The connector system of this insrention enable the daughter Byrd to be inserted into the connector system readily by the 15 computer user.
It it krlown to make connections between daughter and mother board by using pin kinkier which are soldered to the re~pect~Y board.
Al~ernat~vely~ the pow; may be elect Rockwell
( BUD 06 I) ION It FORCE CIRCA
WRAP KEYNOTE ASSUME
BA~ÇROT~F TOE INVENTION
The invention herein relates to a circuit 10 board connector system. It it particularly suite for use in computer systems wherein a series of daughter boards are connected to a other boar. The connector system of this insrention enable the daughter Byrd to be inserted into the connector system readily by the 15 computer user.
It it krlown to make connections between daughter and mother board by using pin kinkier which are soldered to the re~pect~Y board.
Al~ernat~vely~ the pow; may be elect Rockwell
2 I
interconnected by a writeup connection. It it alto - known in a general ennui to make high den fly connections between the daughter and mother board.
There are alto a number of schemes why ah are 5 known to provide zero or low insertion forte connectiorls. Typical low insertion forte c~nnector6 are illustrated in U.S. Patent N~ber~ 3r553~630 to Shingled et at; 4,179,177 to Lapraik; yo-yo to Yore; 3~899,234 to Meager et at; 3,130,351 to (isle;
interconnected by a writeup connection. It it alto - known in a general ennui to make high den fly connections between the daughter and mother board.
There are alto a number of schemes why ah are 5 known to provide zero or low insertion forte connectiorls. Typical low insertion forte c~nnector6 are illustrated in U.S. Patent N~ber~ 3r553~630 to Shingled et at; 4,179,177 to Lapraik; yo-yo to Yore; 3~899,234 to Meager et at; 3,130,351 to (isle;
3,022,481 to Stop; and 3,683,317 to Walk up.
Similar device are also disclosed in US Patent Applicatiolls aye o Outtake and AYE to I,eathe r O
In the various; prior art patents and patent 15 application noted above, the connector ambles include opposing rows of spring-itype connects the low or zero insertion force mechanisms vary to Rome degree but generally include Rome mechanism err deflecting the spring contact to space them apart to allow easy 20 in~ertiorl of Al printed wiring board to the connector.
Jo Thereafter, the contacts ore put into engagement witch corresponding pads on the printed wiring board to make the desired electrical connections. In ode kiwi, the spring contacts are normally biased towered engagement with the printed circuit board and the low insertion - force mechanism prude them apart two allow entry of the printed wiring board to tube connector. In other approaches, the contact mummer are normally fipaced 5 apart and are deflected by the low insertion force mechanism into engagement with the printed wiring board. It it alto known to employ cam and falser arrangements a the low insertion force connector mechanism. The cam member it actable to move the 10 follower member to deflect or close the spring contacts as desired.
The invention described herein provide a connector stem Pro mounting on a mother circuit board which receive a daughter board in a manner that it i 15 easily inserted or released f rum the mother board. The daughter board can be readily at signed within an electrical connector receptacle. The 6ys~em enables the insertion of a daughter board in the connector receptacle in a single orientation. The stem ha an MU improved low insertion force electrical connector - system having a high density of individual connect on and permit easy serviceability by a user.
I
r In accordance we to ibis inventor 21 low insertion force electrical connector system it provided 5 comprise no an electrical connector receptacle having a plurality of electrical contact arranged in at least wow opposing row. the low insertion iris ~y~'cem selectively pus apart the electrical contact in one row f wrier the electrical corltact. in an opposing row to 10 allow the insertion of an electrical plug member with a low insertion force or for providing engagement of said contact in the one and opposing rows with the plug mourner Jo thy the receptacle contact make electrical connection with desired contact of the plug member,, 15 The plug member sway comprise a portion of an elec~ronlc module or a circuit board such a a printed wiring board.
The connector stem further include devils for aligning and locking the electrical plug member 20 after irl~ertion between the respective one and opposing row of corltact~ of the receptacle, In accordance with this ~nvent~ol~y an actuating arrangement it prodded for actuating the Lowe lnQertlon force stem and the align sly and locking Davis on a multi-phase - operation. Prior to insertion of the plug member unto - the receptacle, the actuating arrangement selectively space apart the row of electrical contact dieter insertion of the plug member between the respective 5 row of contact.
The actuating arrangement actuate eerily first the aligning and locking device to align and lock the plug member within the receptacle. Then, the low inertia force system provide for the engagement 10 of the receptacle contacts with the desired contacts of the plug member. The actuating arrangement I alto adapted to ~erlally activate the low insertion force system and the aligning and locking device in a wrier fashion Jo first space apart the receptacle contact and then unlock the plus member to allow the plug member Jo be removed from the receptacle with a low force The recepJcacle, in accordance with this inverltio~ adapted for mounting on a circuit board 20 itch a a mother hoard. The low inertly force system may be of any conventional design" however, preferably, the electrical contact corpora sprung mumbo and a cam and follower arrangement to deflect or undeflect the spring member Jo provide the respective spacing apart and engagemenrc uncanny. In one embodiment the - respective rows of contact comprise alternating high zlnd low contact portions wherein respective high contact in one row oppose respective lo contact on 5 the other row and vise Vera.
The receptacle in accordance with Casey invention, it preferably constructed to allow the plug member or printed wiring board to be inserted f rum the wide or f rum the top, In accordance with another lo aspect of the invention, a printed wit ring board, circuit board or electronic module it provided with a plug portion for inser~lon in an electrlc~l connector receptacle. The plug portion include two parallel rows of contact pads arranged whereon wit h the pad in 15 ore row being staggered relative to the pad; in the other row. This permit an inquiry n~nber of connection which can be made to the circuit board for given size err Preferably the plug portion of the circuit board further includes al~giling and looking 20 holes for accurately aligning the circuit board lrl an electrical receptacle connector septum In a mow preferred embodiment, a locating notch I provided irk one side of the plug portion whereby the at fault board can be inverted on the electrical resupply in only one orientate on r r Figure a perspective view of wide entry card housing employing a plurality of conrlector 5 stem in accordance with this invention. -- -Figure 2 it a perspective view of astraight-in or top entry card housing employing a plurality of connector ~ystelos in accordance with this invention.
Figure 3 and pa are exploded perspective view of connector system in accordance with this invention including a pi uraliLty owe contest segment Figure 4 a perspective view of a connector stem in accordarAce with this invention' mounted to a 15 back plane or mother board with a low insertion iris mechanic in it pen petunia or insertion of module board or daughter board.
inure 5 it a perspective view of the connector ye in Figure 3 which ha been I partially cut aye to show the locking and alignment - eater thereof with respect to dupe board- narrated lthere~n.
inure 6 end view and cros~-~ecltion of two adjacent corlnector ~yRtem~ in accordance with thy inventili~n with the low inert on force Mohawk m in - respectively opened and closed poJ;ition~O
Figure 7 it an easploded perspective riew of a connector septum in accordance with this invention illustrating the locking and aligning mechanism.
Figure 8 it a top view off one end ox a connector system in accordance with this invention.
figure 9 it a wide view of the erld of the connector system shown on Figure 8.
Figure 10 it an end view of the end portion of the connector system shown in Figure 8c Figure 11 it a f font view ox the locking and aligning lever arranged in the end of the conned or ~ys'cem shown in Figures 8-10.
Figure 12 it an exploded perspective of the opposing end of the connector system in accordance wow this involution.
Figure 13 it an end view c3f the opposing end ox the connector fiystem shown in Figure 12.
Figure 14 a top view partially cut awry to reveal the locking and alignirlg lever irk the- opposing end of the connector stem of Figure 12,.
Figure 15 it idea view of the opposing end of the connector stem ox Lowry 12,~
Figure 16 it a bottom view of the-oppo~ing end of the connector system a in Figure 12 .I?ETAILEl2 DOHERTY OF TOE PROOF
Referring now to Figure 1-4, the invention will be described in treater detail. The at rcuit board connector stem 10 of this; invention it adapted to provide a high density of individual connectiorl~ which 10 permit increased speed of signal in the stem Burr serviceability it a particularly important concern in the personal computer field id audaciously to the mainterlance aspect The circuit board connector system 10 of this invention allows the computer owner to add 15 additional feature by buying additional mother or daughter boards 11 which can be readily inverted in the circus board connector septum 10 of this invention.
The connector stem can be mounted on a mother circuit board or backpl no thereby adding increased feature to 20 Lowe computer.
The circuit board connector stem 10 of this invention con be arranged on the mother crook t board 12 in one pun In Figure I carol housing 13 and other circuit hoard Jo are arranged to receive a daughter circuit board 11 by folding the daughter board in from the ire of the mother board in a direction parallel to the plane of the mother board. The circuit board connector system 10 of this; invention acts a the 5 bottom guide for the mother board 11. The card housing 13 also include top shopped eye or guide 14 which, with the circuit board connector system 10, eve to provide ali~nmerlt for the daughter board 11 a it: it slid from the wide into the card housing 13.
It is a feature of the at rcuit board connector system 10 of this invention that the daughter board can be inserted f rum Lowe wide as in Figure 1 or from the top a in Figure 2. In the embodiment of Figure 2, a cafe housing 15 include a plurality of lo I Wright board connector systems 10 arranged on parallel and mounted to the mother erect board 12. The card housing lo include. shopped wide guide 16 Rand on correspondence with the at rout board connector system 10 along each of the ~idefi 17 and 18 of the card 20 housing lo., In this embodirnen~, the daughter board 11 - 5 it inserted into the circuit board connector Ted 10 by sliding it down the Lydia guides 16 and through the top of the circulate board connector sty loo The circuit board connector ~y~tem~10 of thy invention requires. no soldering to the mother circuit - board 12,, The connects stem 10 include no pins which can be easily damaged or bent in making connection to the mother at rcuit board 12.
5 Preferably, the connector system lo it of the low or zero insertion force type Jo that the daughter boards 11 are easily removed or inserted as desired.
In accordance with an embodimerlt of the invention which it best illustrated by reference to 10 Figure 3, the connector system 10 it comprised of a body shell 19 which it adapted to support, in a floating fashion, a plurality of contact ~egmer3t 20~, Each segment 20 can be customized a to it function in the circuit board connector stem 10. For in Tess, 15 some of the segment 20 car be configured to carry signal, while other can be con inured to be power carrying. Thus, different segments 20 can serve totally different func~iorl~. Since the segments 20 are supported in a floating arrangement within the body 20 Hell 19 they can be independently self-aligned relative to the mother circuit board 12. This can be achieved because the various emanate I are able to slide within the body Hell 19 I that they con be precisely located or the contact pads 21 off toe mother circuit board 12. This allow the at rcuit designer to concentrate on err tolerances for the contact pad 21 relative to one another on the mother board 12 why to allowing looser tolerance within the connector system 5 10 so In accordance with another aspect of the present inverltion, a system 22 for aligning and locking the daughter board 11 within the connector stem 10 it provided. The stem it briefly illu~ratedl by 10 rev erring to Figure 4 and 5 . Al inning and locking lever 23 and 24 are pivotal supported in opposing end of the body shell 19. The daughter board 11 include a corresponding pair of alignment hole 25 and 26 in Figure 4. The connector system 10 it shown in US it; Opera pofiiti~n adapted for receipt and insertion of the daughter board I
In Figure 5, toe connector Siam 10 is shown with the twitter board 11 fully inserted and with the aligning and losing yummy 22 in its cloyed position.
I In this position; projection 27 ox the re~peetive t locking levers I and 24 are inverted within the hole 25 and 26 'co at ion and lock the daughter Barlow 11 in desired relationship relative 'co the plane of the mocker board 12. Projection I on locking lever 23 verve to align toe daughter board Lo a lateral tense within the connector stem 10. Projection 29 on locking lever 23 abstract one end of cord Lowe 4û when connector 15 it in the cloyed petunia, arraying that 5 dozier board 11 cannot be inse;ged in either the horizontal or the vertical direction until the connector it opened A notch 28 in the laughter board provide clearance err projection 29 when lever 23 it in the closed position with the daughter board properly 10 in pi ace ..
In accordance with yet another peculate of 'eke present invention, the connector system 10 employ a zero cur low insertion force system 30 having spring contact 31 and 32 and a cam 33 and follower 34 15 arrangement The cam and follower act upon the spring contact 31 and 32 to provide, in an open position as shown in the left hand stem 10, a low or Nero inserltioll force for the daughter board into the system Conversely, whorl in cloyed position, a. shown in the _20 right-hand ~3ylsts~m 10 ox Figure 6 " an electrically contain engagemerlt it made between the spring contact and a:e~pective contact pads 35 on the daughter board 1.
In ~ccordarlce with yet another pocket of the present invention, the respective prying con~aCtB are arranged in an alternating high and low phyla to allow Jan increased Dunn y of electrical enact.
In accordance with ye anther aspect of the 5 present invention, an actuating ~yE;tem 36, as bet illustrated in Figures 7-16, it provided which it adapted to serially actuate the respective al~gnirl~ and locking stem 22 and low insertion force stem 30.
The actuatlrlg stem 36 include an actuating lever 37 10 which include a pad 38 which it adapted to operate a an actuating cam. It alto include a follower portion 39 on each of the locking lever 22 acid 23. upon pivoting the actuating lever 37, the pad I and follower portions 39 cooperate to provide the diehard eerily actuation of the re~pectiYe aligning and locking stem 22 and low inert on force stem 30~, O-The at rcuit board connector stem 10, and the various aspect of the invention embodied therein, now Dick iced in greater detail to dew ire the 20 preferred embodiment thereof. Referring row to Flogger 3, I 7 and 12, there it one on *le~tr~c~l connector stem which comprises an ~lectr~c~l connector rustically flyer talent to crook: board 12 finch I mother board or backpl~ne~ The receptacle 10 it lldaptedl I receive an e~eotr~cal plus member 11 - which can comprise part of on electronic nodule or a circuit board such as a daughter board Receptacle 10 it comprised of a body Hell 19 S and contact segment 20 a previously dockyard. the body Hell 19 comprise an elongated t 40 defined by spying wide walls 41 and 42 and end wall 43. Region 44 of the slot opposing toe end wall 43 it open. The circuit board 11 can therefore be inserted into the 10 receptacle 10 f rum the top or f rum the wide in the diYectiorl Winnie by the arrow 45 and 46.
As shown in Figure 7 and 12, the segment 20 are inverted into the body Hell 19 f rum the bottom.
The body Hell 19 includes internal dividing wall 47 15 which divide the Hell into a plurality ox chamber 48~
The nwnber of chamber 4B correspond Jo the number of segment 20 to be supported by the body shell 19., A
err of depre~ion~ 49 in the wide wall 41 and 42 5 mark the respective locations of the internal we 47..
20 Generally centrally ox each c9f the wide walls 41 and I
of each respective chamber 48 there it costed rectangular hole So,. This compare part of a ~y~tela for supporting tube segment 20 within the b~dy--~hell 19 I an l~deperldent floating arrangement 'chat. each egomaniac 20 earl be independelltly aligned to toe circuit board 12.
The other element of the floating support system 51 are a proj~ct~c)3rl 52 correspondingly centrally located sun each segment 20 idea wall 53 and 54. The projection 52 have a pyramid shape so that when the segment 20 are inverted into the chamber 48" the pro iectlon~ 52 spread apart the respective wide walls 41 and 42 until like projection; 52 snap into> the hole 50. The hole 50 are larger in width and height than the corresponding width and height of the projection 52 thereby allowing the segment to have a limited degree of freedom within the chamber 48 both vertically and from Elide to wide and back to bask. A B up 55 in each of the side wall; 41 and 42 provide a corre~pondln internal Taipei Sirius So limiting vertical movement of the emanate 20 when the receptacle 10 it molted to the circuit board 12. Thea provide; an effeotlve mean for cla3Dpirlg the Lyman down on the circuit board 12.
2û Each Simon 20 includes longitudinal ledge I in each ox the r~pective Dow wall 53 end I why ah it adapted to engage the re~;pectl~e stop surfaces 56~, The body Hell 19 :Eurlther includel3 an alignment pr~s~ection 58 at one end I which adapted Jo mate with a corresponding alig~TenJc hole 11l thy- circuit board I The cement 20 include at one end an aligm[~nt projectional 61 adopted to eke in corresponding ali~nmen'c hole I of the circuit board S 12 when the emanate 2û are inserted in the cavities 48 of the Hell 19. The alignment projection so and 61 extend in a pod apart arrangement Assyria the anti no receptacle lo and provide an effective mean for aligning he receptacle on the at rcuit board 12 ennui 10 the projections teat in the alignmerlt hole 59 and 62.
The segments 20 can float particularly from side to side within the body shell 19 tvla limited extent wince each segment include its own alignment projection system 61 Lo Very accurate allgr~ent of each segment it ,' achieved TV the at rcuit board 12 and there it no buildup of any slur mimetic over the lerlgth of the receptacle 10. They'll it a hilly significant lea use wince lit it desired to pack a Ann contact a pow bye lot each segment. It it a unique f nature of - the prolate invention that a err high density of electrical contact call be employed it toe receptacle whole maintaining adequate ~l~gr~nent with the corresponding contact pod 21 of the I rcuit board 12., Each ~egmellt 20 it camp ox a ~e~en'c body - I which it arrallge~ to support two opposing row of luring contact member 64. One end 65 of each spring contact member comprises a contact portion for engaging S a eorre~pondirlg contact pad 5 of a daughter hoard 11~.
The opposing end 66 of the spring contact member 64 compare a lever-type contact portion for engaging and contacting the contact pad 21 of the mother board 12.
The use I ïever-type contact 66 and kink pad 10 provide a ga~-tight, high pressure connection The end of the concoct portion 66 it forced into the contact pad 21 and, my digging into it make good electrical connection because it break through the ode on the surface of the pad. With this type of contact arrangement it I not Nasser to provide good contact pads or gold plating of the portion 66. A
till-to-~cin connection, which it much lest eYpen~!3iVe9 if;
thereby pueblo. The concoct pad 35 on the daughter board, however are normally gold plated.
The contact mummer 64 con }ye selected to be signal carry~rlg~ such a the narrow contact sobers 32r or whey can be power or current carrying 6uc1~ 'eke relatively wider contact lumber 680 the segment 20 can therefcare have their furlc'c~ons tailored Al dew rod for handling signal or power or any other unquote which might be wreck rend It it a preferred feature of the prevent invention to provide the highest density of contact 5 member 64 in the segment 20. This it partially accomplished by providing alternating high 32 and low 31 contact number in each respective row of contacts., Further, respective high contacts 32 in one rc7~ no arranged in opposition to no pective low Contacts 31 in 10 the opposing row of contact member 64.
Correspondingly a low contact Al in the one row of contact it an opposition to a high contact in the opposing row of contact These high and low kink 32 and Al are adapted to engage two staggered raw of is contact pads 35 a illustrated in Figure 1 by staggering the contact pad 35 in Sue row as shun.
It is p~s~$ble to provide a higher density of contact with a greater tolerance concerning the alignment of the contact puritan 65 of each gent with toe pad 35. Thy minimizes the wreck off - mi~reg~str~ti~n be . wren the contact portion 65 ox the repacks high an low contacts 32 end 31- of each segment with the cvntl~ct p~d6 35~ It alto ennoble reduced chance ox shorting in the event tint the - contact portion 65 are slightly bent wince-- there qllite a large distance between high contact in any particular row This it alto true of the low corltact~.
This Isch~ne permit; the size of tube pads 35 to be increased and minimizes the criticality_ of a passage between the pod A err of connector syfitems 10 can be placed On a mother at rcuit board 12 with any type of conventional hold down or clamping device 70 such a the one illustrated in Figure 6. The clamping members 71 or 72 are arranged lo engage the step 55 in the side .
walls 41 or 42. The clamping member 71 or 72 are secured to the at rcuit board or mother hoard 12 by bolt 73 or otherwl~e attuned to the at rcuit board 12 Jo a to enable the contacts 66 of the prig contact member 64 to engage the pad US on the mother board 12. As previously described, the top surface 56 engage like ledge 57 of the segment 20 to hold the segment 20 Jo that the contact 66 make good electrical . 20 connection c> 'eke contact pad 35. The damping member - 71 it adapted lo be employed between assign receptacles 10 whereas the cleanup no member 72 to adapted to clamp a free side 41 of the rec:ep~cie 10., A great deal of ~Elea~ibillty in construcltlng ,: .
pi computer circuit board system it pueblo with- a design owe this electrical c:orlnec~or stem 'rho receptacle 10 can have any multiple so segments 20; for example, 5, 7, 11, etch, a dullard. plurality of receptacle 10 5 can be arranged owe the Matthew board --it- aajarent parallel relatiorlship a shown in Figure 1 and I
Ire desired, the receptacle cay extend beyond the mother Inboard 12 Jo that additional connector segment 20 it the receptacle 10 can be connected to 10 other type of plug portions and circuit connectors or element;. For example, the receptacle 10 can encompass the mother board a well as accommodate other totally different pow of Seneca tons located completely off the mother board.
Each of the segment 20 include a low or zero ir~sertîon force mech~ni~n for - stem 30~ the ,,, contact ranter 64 on the embodiment shown n Figure 6 are budged toward the contact member of the opposing row Jo that if they were on the r f fee state, they 20 should trike the pos~tionF: shown in phantom lo 'eke _ .
right-harldl receptacle 10 ox Figure 6. -Lowe low insertion force mechanism thereby employ Cody 33 and oily I
Whorl the cay 33 it rotated lo position - shown on the left-hand receptacle 10 of Figure 6 7 follower 34 moves upwardly to deflect the spring member 64 in cone row away f rum the spring member 64 on the opposing row. This allow the circuit board 11 to be 5 inward in the Luke 40 with a low or zero insertion force When the cam 33 it rotated Jo like posi~iQn~
shown in the r;ght-hand receptacle 10 of Figure 6, the follower 34 it lowered to release the contact member 64 80 that the contact portion 65 engage the rejective 10 contact pad 35 of the daughter board 11. Preferably, each segment includes it own separate f hollower member 34~ However, the cam member 33 preferably compare a unitary member or metal rod extending through all the segment 20 in the receptacle lo. The cam member 33 15 preferably ha an oblong or oval crow - cation.
The top surface 74 of the follower member it arrange to engage the spring contact: 64 to deflect them to pus thin apart or release them Jo that they can engage the laughter board 11. The fc>llo~er member 20 34 ha a It shaped cros~-~ection ire it upper porltionO
- Whey it it poisoned a in the left-hand rustily 10 in Figure 6 for swept of the I fault board- 11, toe by Tom owe tube l~hapedJ 75, err a top surface for I Nina byway at rcuit board 11 during ill~ertlon.
The lower portion so the follower member 34 crow Elton 76, ha a hook-like shape Jo that when the f of l owe r member r i wit Thor awn a in the n ght-hand receptacle 10 in Figure 6 it it held dowry in the 5 withdrawn position by engagement between the cam 33 and the hook-p~r'cion 76.
The segment body 63 include an outer segment support member 77 and sun inner segment support ~egmellt 78~ The spring contact 64 are held in place between 10 the no pective support member 77 and I The inner support member 78 alto eve to Support the cam and follower member 33 and 34, While the low or zero inrush force mechanism 30 ha been described by reference to the I embodiment particularly shown in figure my any diehard low inrush force mechan~m con be employed illu~rated by the Norris patent noted on the background of this pal icatlon. While it it prey erred in accordance with this invention, for the sprint 20 contact 3ae;nbers 64 it one row Jo be biased toward the prig contact number I in the opposing Roy if desired, a illustrated in the background of this inverltionV the opposite approach can ID@ employer. In such an oppos~Lt~ approach, thy follower member en Lo to deselect the spring contact 64 to have the contact -potion 65 engage the contact pod 35 or release the wring contact Jo that they are. spaced apart in their tree state A illus'cra$ed it Figure 7, actuating lever 38 if secured to the cam 33. Tbi~ enable the operator to rotate the cam 33 by moving the lever 3 8 between it respective open and cloyed petunia illustrated no Figure 4 and 5;, Alternatively, if desired; the lenqtb of the lever 3 8 earl be made much longer Jo that an operator need only reach to the top of the circuit board area in order to turn it. This embodiment Allah provide growler leverage on thy cam 33 for easier operation. eke another approach adapted for rote acutely it to ~ub~ti~ute a lever 79,, which by the use of a ~ui'cable linkage 80 p~votally convected to the erred 81 of the lever 79, can be remotely actuated For example, the linkage 8û can be brought out through a hole, not shown, in the top of the card housing 13 20 shown in Figure by pulling up on the linkage 80, the cam 33 I pi-voted to opera the receptacle for ire ion of the at rculî board 11. By pushillg down on the linkage 80, the reverse of the operation t~lces plus.
I
Referring now to Figure 4-5 and 7~16, the aligning and locking ye 22 and the! actuating system 36 will be de~crîbed in greater Doyle. A previously described, the at inning and locking ~y8tem I it 5 compared of locking lever 23 and 24. The body Hell 19 include a support extension 82 at it end 44. The lever I it pivotal supported about an extension bate 83 by mean of a split cylinder pin 84 inward through hole 85 and 86 ion the respective lever 23 and base 83.
A second extension support bate 87 include a squire hole 88 through which the cam 33 it inverted.
Prior to insertion of the cam 33, the actuating lever 37~ fork like projections 89, is positioned with a bate 87 between to leg of the fork like projection 89.
filet 90 in the foreclose projections 89 closely fit the cro~-section of the cam 33,. the cam 33 Lo held within the receptacle 10 after insertion. In erti3n through each of the respective segment 20 by means of a ply pun 91 inherited through hole 92 in the cam 33 within a slot 93 I bet illu~tY~ted in Figure 16. The pun 91 eve to lock the cam in place end toe cast in turn, err TV logic the actuating lever 37 in place.
referring not? Doria particularly to Tao actuating no locking ~;yE~tem~ 22 end 36 a toe eddy Lo 27 'I
of he body Hell I reverence it had to Fugue 7-11.
The locking lever 23 include a first progeny I
which is adapted to be inserted in an alignment hole 25 on one wide of the circuit board 11~ it further 5 include a equaled projection 29 which is adapted to be inverted in the notch 28 on one idea of the at Kowtow board 11. the looking lever 23 also include a folks portion I dew inked by the upper turf ace of one of the support leg OWE The follower portion 39 it) includes a notch 96. The actuating lever 37 include a tab 38 which acts a a cam. The follower portion 39 also includes a top portion 96 in operation when the lever 37 i in it vertical position as shown. The cam 33 disengage the segment follower 34 that the contacts 31 and 32 clove against the daughter Byrd on Thea position, the tab or cast 3 8 has engaged the ox portion 96 to pivot the lever 23 against the circuit board 11 Jo what tube projection 27 and 29 teat , .
on the respective hole 25 and phyla 28.
When the lever 37 it pivoted in the opposite direction to pollution a shown in Figure 4, toe cam tab I does not pivot the lever 23 until it enjoy the top portisD 97 deponed by the lower wide of the lot 96, Therefore toe lever 37 move f rum the fitOp portion 96 to the top portion 97, there it no movement owe the lever I . overrode the cam 33 it rotated f fore it clockwise actuation pushier lo islet; open actuation position The tab 38 engage the lop partisan 97 5 Burr the lever 37 it rotated lo it co~r.pleltely opera position,. Tory the t2lb 38 engage the Top portion 97, continued pivot on a downwardly direction of the lever 37 cause the lever 23 to pivot away loom the circuit Iboa'rdl thereby disengaging the projection 27 and 29 from the respective hole 25 and 810'!t 28.
Therefore when the lever 37 us moved from it cloyed position to it open position, the contact are first spaced ap~rlt under the action of the cam 33 and follower 34 and then the locking lever Jo disengaged in Lo a eerily fashion.
When the lever 37 it moved f row it open pox on as it Figure 4 to it cloyed position in Figure 5, a reverse err off ~peratiDn~ occur. When the lever 37 it in it full Opel posy lion,, the tab 38, 20 due to tube piloting action ox thy lever 23~, Navaho into the slot 96~. TherePore9 the upper wide Wylie ox . ye lo 9 B it engaged by the flab 38 of the Lowry 37 it beg to movement in an upwardly. dlr~ct~on. rho Cole the lever 23 to pivot about pin 8Jl into its lGckirl~ and aligrled position against the circuit board 11 with a small rotation of the lever. 37. This small rotation however is in~ufficierlt to rotate the cam 33 sufficiently agaisl~t the follower 34 to close 'eke 5 contact. A the lever 23 pot under the action of the pad 38 against the top portion I, the tab moves out of the slot 96 just a the lever 23 fully Allah and logic against the board 11. The lever 37 I
thereof ton f fee to continue rotation to it upward lo position against the stop 96 and thereby release the contact fur engagement with the circuit board Therefore, the action of the cam 38 and follower I it such that when the lever 37 it moved f rum it open position to the closed position, shown in figure 4 and 15 5, respectively the circuit board it first already and locked in place and then the contact are released to engage the circuit board In accordance with a prey erred embodiment of this invention, the aligning and locking stem I and 20 actuating 8y8teml}; 36 include the second at inning and locking lever 24 and a second actuating lever- 99. Thy second lever 24 and the second lever 99 ore outed at the oppo~ g end I of the body Hell 19. By Noah of a support e%ten~ioTI 100, the extent n 100 include support 101 about which the lever 24 p;votally supported by a ply it pin OWE It extends through hole 103 in the lever 24 and 104 in the base 101. A
previously described, the cam rod 33 extend throl3gh a slot 93 terminatirlg in a Corey hole 105 in a second support bye 106 in the extension 100 The second actuating lever 99 includes a lot 90 which has a crow section closely corresponding to the crow cation of the cam 33., The lever 99 it positioned about the cram 33 between the lever 4 and the upper base extension 106. The lever 99 inlays tab 38 corresponding the tab of the lever 37.
Similarly the lever 24 include a follower portion 39 corresponding to the follower portion of the lever 23.
15Tbe follower portion include a lo including top por~orl~ go and 98. It also includes top portion I.
The operation of fever 99 it tied to the operator of lever 37 by the cam 33. The inner action ox lever 99 with the lever 24 via the tab 333 and oilier 39 it identical Jo the inner action previously de~crlbed with the respect to the lever 37 and 23 zlnd~
Hereford not described again when tie lever 37 moved between it respective open and Clyde potion, the fever 99 move between corre~pondi319 .
potion and interacts with the lever 24 in the same manner a the lever 37 interact with the lever 23.
The projections 27 which serve to align and lock the at rcuit board 11 in the receptacle lo are 5 tapered Jo that a slight misalignment of the circuit board 11 doe not prevent at ignment and locking of Lowe hoard into the receptacle. The taper ox the projection 27 verve to move the board into it properly aligned position. It should be apparent the the colltact8 67 of the receptacle 10 cannot be closed unwell the circuit board 11 it properly locked and aligned within the receptacle. Any misalignment would prevent the projection 27 and 29 f rum being inverted in the respective alignment hole 25 and slot 280 15 This, in turn would prevent the pivoting of the lever 23 and 24 into their sully and aligned option The ._ failure of those levers to pivot o their fully aligned and locked potion royalty in the tab 38 of the lever 37 of 99 engaging the stop portion 96 on the 20 re~pecti~Te followers 39 Thy prevents further pivoting of the lever 37 and the cam 33t- thereby preventln5~ engagement of the contact to the circuit board 11., urethra necessary what the projections or alignment pin. 27 and 29 on both idea- of the - receptacle 10 be seated in their re~pectiYe Hillel 25 and slow 28 in order to completely clove the contacts 67 so Tao receptacle llD9 Thus, the receptacle lever 37 S cannot be fully closed to the po~itlon shown in Figure 5 unless both corners of the circuit board 11 are fly seated in the connector housing.. In the event ox a rai~alignment, the operator cannot clove the handle 37 completely and mutt readjust the circuit board 11 Jo 10 that the alignment can take place. When the lever 37 it in the position of Figure 5, the circuit board cannot be pulled out off the receptacle lo out the wide of the receptacle 10~ unless the handle 37 first pivoted to it open p~Eitis:n a shown in Figure 4.
It Schloss be underwood that the foregoing decoration it oxlly lllu~trative of 'eke invention.
Voyeur alternative and modification Sheehan be devised by those sidled in eke ark without departing $ wreck toe invention. Accordirlgly, the present invention it 20 irltended to embrace all such alternatives, modification and Yearns which full within the scope of the appended Lomb.,
Similar device are also disclosed in US Patent Applicatiolls aye o Outtake and AYE to I,eathe r O
In the various; prior art patents and patent 15 application noted above, the connector ambles include opposing rows of spring-itype connects the low or zero insertion force mechanisms vary to Rome degree but generally include Rome mechanism err deflecting the spring contact to space them apart to allow easy 20 in~ertiorl of Al printed wiring board to the connector.
Jo Thereafter, the contacts ore put into engagement witch corresponding pads on the printed wiring board to make the desired electrical connections. In ode kiwi, the spring contacts are normally biased towered engagement with the printed circuit board and the low insertion - force mechanism prude them apart two allow entry of the printed wiring board to tube connector. In other approaches, the contact mummer are normally fipaced 5 apart and are deflected by the low insertion force mechanism into engagement with the printed wiring board. It it alto known to employ cam and falser arrangements a the low insertion force connector mechanism. The cam member it actable to move the 10 follower member to deflect or close the spring contacts as desired.
The invention described herein provide a connector stem Pro mounting on a mother circuit board which receive a daughter board in a manner that it i 15 easily inserted or released f rum the mother board. The daughter board can be readily at signed within an electrical connector receptacle. The 6ys~em enables the insertion of a daughter board in the connector receptacle in a single orientation. The stem ha an MU improved low insertion force electrical connector - system having a high density of individual connect on and permit easy serviceability by a user.
I
r In accordance we to ibis inventor 21 low insertion force electrical connector system it provided 5 comprise no an electrical connector receptacle having a plurality of electrical contact arranged in at least wow opposing row. the low insertion iris ~y~'cem selectively pus apart the electrical contact in one row f wrier the electrical corltact. in an opposing row to 10 allow the insertion of an electrical plug member with a low insertion force or for providing engagement of said contact in the one and opposing rows with the plug mourner Jo thy the receptacle contact make electrical connection with desired contact of the plug member,, 15 The plug member sway comprise a portion of an elec~ronlc module or a circuit board such a a printed wiring board.
The connector stem further include devils for aligning and locking the electrical plug member 20 after irl~ertion between the respective one and opposing row of corltact~ of the receptacle, In accordance with this ~nvent~ol~y an actuating arrangement it prodded for actuating the Lowe lnQertlon force stem and the align sly and locking Davis on a multi-phase - operation. Prior to insertion of the plug member unto - the receptacle, the actuating arrangement selectively space apart the row of electrical contact dieter insertion of the plug member between the respective 5 row of contact.
The actuating arrangement actuate eerily first the aligning and locking device to align and lock the plug member within the receptacle. Then, the low inertia force system provide for the engagement 10 of the receptacle contacts with the desired contacts of the plug member. The actuating arrangement I alto adapted to ~erlally activate the low insertion force system and the aligning and locking device in a wrier fashion Jo first space apart the receptacle contact and then unlock the plus member to allow the plug member Jo be removed from the receptacle with a low force The recepJcacle, in accordance with this inverltio~ adapted for mounting on a circuit board 20 itch a a mother hoard. The low inertly force system may be of any conventional design" however, preferably, the electrical contact corpora sprung mumbo and a cam and follower arrangement to deflect or undeflect the spring member Jo provide the respective spacing apart and engagemenrc uncanny. In one embodiment the - respective rows of contact comprise alternating high zlnd low contact portions wherein respective high contact in one row oppose respective lo contact on 5 the other row and vise Vera.
The receptacle in accordance with Casey invention, it preferably constructed to allow the plug member or printed wiring board to be inserted f rum the wide or f rum the top, In accordance with another lo aspect of the invention, a printed wit ring board, circuit board or electronic module it provided with a plug portion for inser~lon in an electrlc~l connector receptacle. The plug portion include two parallel rows of contact pads arranged whereon wit h the pad in 15 ore row being staggered relative to the pad; in the other row. This permit an inquiry n~nber of connection which can be made to the circuit board for given size err Preferably the plug portion of the circuit board further includes al~giling and looking 20 holes for accurately aligning the circuit board lrl an electrical receptacle connector septum In a mow preferred embodiment, a locating notch I provided irk one side of the plug portion whereby the at fault board can be inverted on the electrical resupply in only one orientate on r r Figure a perspective view of wide entry card housing employing a plurality of conrlector 5 stem in accordance with this invention. -- -Figure 2 it a perspective view of astraight-in or top entry card housing employing a plurality of connector ~ystelos in accordance with this invention.
Figure 3 and pa are exploded perspective view of connector system in accordance with this invention including a pi uraliLty owe contest segment Figure 4 a perspective view of a connector stem in accordarAce with this invention' mounted to a 15 back plane or mother board with a low insertion iris mechanic in it pen petunia or insertion of module board or daughter board.
inure 5 it a perspective view of the connector ye in Figure 3 which ha been I partially cut aye to show the locking and alignment - eater thereof with respect to dupe board- narrated lthere~n.
inure 6 end view and cros~-~ecltion of two adjacent corlnector ~yRtem~ in accordance with thy inventili~n with the low inert on force Mohawk m in - respectively opened and closed poJ;ition~O
Figure 7 it an easploded perspective riew of a connector septum in accordance with this invention illustrating the locking and aligning mechanism.
Figure 8 it a top view off one end ox a connector system in accordance with this invention.
figure 9 it a wide view of the erld of the connector system shown on Figure 8.
Figure 10 it an end view of the end portion of the connector system shown in Figure 8c Figure 11 it a f font view ox the locking and aligning lever arranged in the end of the conned or ~ys'cem shown in Figures 8-10.
Figure 12 it an exploded perspective of the opposing end of the connector system in accordance wow this involution.
Figure 13 it an end view c3f the opposing end ox the connector fiystem shown in Figure 12.
Figure 14 a top view partially cut awry to reveal the locking and alignirlg lever irk the- opposing end of the connector stem of Figure 12,.
Figure 15 it idea view of the opposing end of the connector stem ox Lowry 12,~
Figure 16 it a bottom view of the-oppo~ing end of the connector system a in Figure 12 .I?ETAILEl2 DOHERTY OF TOE PROOF
Referring now to Figure 1-4, the invention will be described in treater detail. The at rcuit board connector stem 10 of this; invention it adapted to provide a high density of individual connectiorl~ which 10 permit increased speed of signal in the stem Burr serviceability it a particularly important concern in the personal computer field id audaciously to the mainterlance aspect The circuit board connector system 10 of this invention allows the computer owner to add 15 additional feature by buying additional mother or daughter boards 11 which can be readily inverted in the circus board connector septum 10 of this invention.
The connector stem can be mounted on a mother circuit board or backpl no thereby adding increased feature to 20 Lowe computer.
The circuit board connector stem 10 of this invention con be arranged on the mother crook t board 12 in one pun In Figure I carol housing 13 and other circuit hoard Jo are arranged to receive a daughter circuit board 11 by folding the daughter board in from the ire of the mother board in a direction parallel to the plane of the mother board. The circuit board connector system 10 of this; invention acts a the 5 bottom guide for the mother board 11. The card housing 13 also include top shopped eye or guide 14 which, with the circuit board connector system 10, eve to provide ali~nmerlt for the daughter board 11 a it: it slid from the wide into the card housing 13.
It is a feature of the at rcuit board connector system 10 of this invention that the daughter board can be inserted f rum Lowe wide as in Figure 1 or from the top a in Figure 2. In the embodiment of Figure 2, a cafe housing 15 include a plurality of lo I Wright board connector systems 10 arranged on parallel and mounted to the mother erect board 12. The card housing lo include. shopped wide guide 16 Rand on correspondence with the at rout board connector system 10 along each of the ~idefi 17 and 18 of the card 20 housing lo., In this embodirnen~, the daughter board 11 - 5 it inserted into the circuit board connector Ted 10 by sliding it down the Lydia guides 16 and through the top of the circulate board connector sty loo The circuit board connector ~y~tem~10 of thy invention requires. no soldering to the mother circuit - board 12,, The connects stem 10 include no pins which can be easily damaged or bent in making connection to the mother at rcuit board 12.
5 Preferably, the connector system lo it of the low or zero insertion force type Jo that the daughter boards 11 are easily removed or inserted as desired.
In accordance with an embodimerlt of the invention which it best illustrated by reference to 10 Figure 3, the connector system 10 it comprised of a body shell 19 which it adapted to support, in a floating fashion, a plurality of contact ~egmer3t 20~, Each segment 20 can be customized a to it function in the circuit board connector stem 10. For in Tess, 15 some of the segment 20 car be configured to carry signal, while other can be con inured to be power carrying. Thus, different segments 20 can serve totally different func~iorl~. Since the segments 20 are supported in a floating arrangement within the body 20 Hell 19 they can be independently self-aligned relative to the mother circuit board 12. This can be achieved because the various emanate I are able to slide within the body Hell 19 I that they con be precisely located or the contact pads 21 off toe mother circuit board 12. This allow the at rcuit designer to concentrate on err tolerances for the contact pad 21 relative to one another on the mother board 12 why to allowing looser tolerance within the connector system 5 10 so In accordance with another aspect of the present inverltion, a system 22 for aligning and locking the daughter board 11 within the connector stem 10 it provided. The stem it briefly illu~ratedl by 10 rev erring to Figure 4 and 5 . Al inning and locking lever 23 and 24 are pivotal supported in opposing end of the body shell 19. The daughter board 11 include a corresponding pair of alignment hole 25 and 26 in Figure 4. The connector system 10 it shown in US it; Opera pofiiti~n adapted for receipt and insertion of the daughter board I
In Figure 5, toe connector Siam 10 is shown with the twitter board 11 fully inserted and with the aligning and losing yummy 22 in its cloyed position.
I In this position; projection 27 ox the re~peetive t locking levers I and 24 are inverted within the hole 25 and 26 'co at ion and lock the daughter Barlow 11 in desired relationship relative 'co the plane of the mocker board 12. Projection I on locking lever 23 verve to align toe daughter board Lo a lateral tense within the connector stem 10. Projection 29 on locking lever 23 abstract one end of cord Lowe 4û when connector 15 it in the cloyed petunia, arraying that 5 dozier board 11 cannot be inse;ged in either the horizontal or the vertical direction until the connector it opened A notch 28 in the laughter board provide clearance err projection 29 when lever 23 it in the closed position with the daughter board properly 10 in pi ace ..
In accordance with yet another peculate of 'eke present invention, the connector system 10 employ a zero cur low insertion force system 30 having spring contact 31 and 32 and a cam 33 and follower 34 15 arrangement The cam and follower act upon the spring contact 31 and 32 to provide, in an open position as shown in the left hand stem 10, a low or Nero inserltioll force for the daughter board into the system Conversely, whorl in cloyed position, a. shown in the _20 right-hand ~3ylsts~m 10 ox Figure 6 " an electrically contain engagemerlt it made between the spring contact and a:e~pective contact pads 35 on the daughter board 1.
In ~ccordarlce with yet another pocket of the present invention, the respective prying con~aCtB are arranged in an alternating high and low phyla to allow Jan increased Dunn y of electrical enact.
In accordance with ye anther aspect of the 5 present invention, an actuating ~yE;tem 36, as bet illustrated in Figures 7-16, it provided which it adapted to serially actuate the respective al~gnirl~ and locking stem 22 and low insertion force stem 30.
The actuatlrlg stem 36 include an actuating lever 37 10 which include a pad 38 which it adapted to operate a an actuating cam. It alto include a follower portion 39 on each of the locking lever 22 acid 23. upon pivoting the actuating lever 37, the pad I and follower portions 39 cooperate to provide the diehard eerily actuation of the re~pectiYe aligning and locking stem 22 and low inert on force stem 30~, O-The at rcuit board connector stem 10, and the various aspect of the invention embodied therein, now Dick iced in greater detail to dew ire the 20 preferred embodiment thereof. Referring row to Flogger 3, I 7 and 12, there it one on *le~tr~c~l connector stem which comprises an ~lectr~c~l connector rustically flyer talent to crook: board 12 finch I mother board or backpl~ne~ The receptacle 10 it lldaptedl I receive an e~eotr~cal plus member 11 - which can comprise part of on electronic nodule or a circuit board such as a daughter board Receptacle 10 it comprised of a body Hell 19 S and contact segment 20 a previously dockyard. the body Hell 19 comprise an elongated t 40 defined by spying wide walls 41 and 42 and end wall 43. Region 44 of the slot opposing toe end wall 43 it open. The circuit board 11 can therefore be inserted into the 10 receptacle 10 f rum the top or f rum the wide in the diYectiorl Winnie by the arrow 45 and 46.
As shown in Figure 7 and 12, the segment 20 are inverted into the body Hell 19 f rum the bottom.
The body Hell 19 includes internal dividing wall 47 15 which divide the Hell into a plurality ox chamber 48~
The nwnber of chamber 4B correspond Jo the number of segment 20 to be supported by the body shell 19., A
err of depre~ion~ 49 in the wide wall 41 and 42 5 mark the respective locations of the internal we 47..
20 Generally centrally ox each c9f the wide walls 41 and I
of each respective chamber 48 there it costed rectangular hole So,. This compare part of a ~y~tela for supporting tube segment 20 within the b~dy--~hell 19 I an l~deperldent floating arrangement 'chat. each egomaniac 20 earl be independelltly aligned to toe circuit board 12.
The other element of the floating support system 51 are a proj~ct~c)3rl 52 correspondingly centrally located sun each segment 20 idea wall 53 and 54. The projection 52 have a pyramid shape so that when the segment 20 are inverted into the chamber 48" the pro iectlon~ 52 spread apart the respective wide walls 41 and 42 until like projection; 52 snap into> the hole 50. The hole 50 are larger in width and height than the corresponding width and height of the projection 52 thereby allowing the segment to have a limited degree of freedom within the chamber 48 both vertically and from Elide to wide and back to bask. A B up 55 in each of the side wall; 41 and 42 provide a corre~pondln internal Taipei Sirius So limiting vertical movement of the emanate 20 when the receptacle 10 it molted to the circuit board 12. Thea provide; an effeotlve mean for cla3Dpirlg the Lyman down on the circuit board 12.
2û Each Simon 20 includes longitudinal ledge I in each ox the r~pective Dow wall 53 end I why ah it adapted to engage the re~;pectl~e stop surfaces 56~, The body Hell 19 :Eurlther includel3 an alignment pr~s~ection 58 at one end I which adapted Jo mate with a corresponding alig~TenJc hole 11l thy- circuit board I The cement 20 include at one end an aligm[~nt projectional 61 adopted to eke in corresponding ali~nmen'c hole I of the circuit board S 12 when the emanate 2û are inserted in the cavities 48 of the Hell 19. The alignment projection so and 61 extend in a pod apart arrangement Assyria the anti no receptacle lo and provide an effective mean for aligning he receptacle on the at rcuit board 12 ennui 10 the projections teat in the alignmerlt hole 59 and 62.
The segments 20 can float particularly from side to side within the body shell 19 tvla limited extent wince each segment include its own alignment projection system 61 Lo Very accurate allgr~ent of each segment it ,' achieved TV the at rcuit board 12 and there it no buildup of any slur mimetic over the lerlgth of the receptacle 10. They'll it a hilly significant lea use wince lit it desired to pack a Ann contact a pow bye lot each segment. It it a unique f nature of - the prolate invention that a err high density of electrical contact call be employed it toe receptacle whole maintaining adequate ~l~gr~nent with the corresponding contact pod 21 of the I rcuit board 12., Each ~egmellt 20 it camp ox a ~e~en'c body - I which it arrallge~ to support two opposing row of luring contact member 64. One end 65 of each spring contact member comprises a contact portion for engaging S a eorre~pondirlg contact pad 5 of a daughter hoard 11~.
The opposing end 66 of the spring contact member 64 compare a lever-type contact portion for engaging and contacting the contact pad 21 of the mother board 12.
The use I ïever-type contact 66 and kink pad 10 provide a ga~-tight, high pressure connection The end of the concoct portion 66 it forced into the contact pad 21 and, my digging into it make good electrical connection because it break through the ode on the surface of the pad. With this type of contact arrangement it I not Nasser to provide good contact pads or gold plating of the portion 66. A
till-to-~cin connection, which it much lest eYpen~!3iVe9 if;
thereby pueblo. The concoct pad 35 on the daughter board, however are normally gold plated.
The contact mummer 64 con }ye selected to be signal carry~rlg~ such a the narrow contact sobers 32r or whey can be power or current carrying 6uc1~ 'eke relatively wider contact lumber 680 the segment 20 can therefcare have their furlc'c~ons tailored Al dew rod for handling signal or power or any other unquote which might be wreck rend It it a preferred feature of the prevent invention to provide the highest density of contact 5 member 64 in the segment 20. This it partially accomplished by providing alternating high 32 and low 31 contact number in each respective row of contacts., Further, respective high contacts 32 in one rc7~ no arranged in opposition to no pective low Contacts 31 in 10 the opposing row of contact member 64.
Correspondingly a low contact Al in the one row of contact it an opposition to a high contact in the opposing row of contact These high and low kink 32 and Al are adapted to engage two staggered raw of is contact pads 35 a illustrated in Figure 1 by staggering the contact pad 35 in Sue row as shun.
It is p~s~$ble to provide a higher density of contact with a greater tolerance concerning the alignment of the contact puritan 65 of each gent with toe pad 35. Thy minimizes the wreck off - mi~reg~str~ti~n be . wren the contact portion 65 ox the repacks high an low contacts 32 end 31- of each segment with the cvntl~ct p~d6 35~ It alto ennoble reduced chance ox shorting in the event tint the - contact portion 65 are slightly bent wince-- there qllite a large distance between high contact in any particular row This it alto true of the low corltact~.
This Isch~ne permit; the size of tube pads 35 to be increased and minimizes the criticality_ of a passage between the pod A err of connector syfitems 10 can be placed On a mother at rcuit board 12 with any type of conventional hold down or clamping device 70 such a the one illustrated in Figure 6. The clamping members 71 or 72 are arranged lo engage the step 55 in the side .
walls 41 or 42. The clamping member 71 or 72 are secured to the at rcuit board or mother hoard 12 by bolt 73 or otherwl~e attuned to the at rcuit board 12 Jo a to enable the contacts 66 of the prig contact member 64 to engage the pad US on the mother board 12. As previously described, the top surface 56 engage like ledge 57 of the segment 20 to hold the segment 20 Jo that the contact 66 make good electrical . 20 connection c> 'eke contact pad 35. The damping member - 71 it adapted lo be employed between assign receptacles 10 whereas the cleanup no member 72 to adapted to clamp a free side 41 of the rec:ep~cie 10., A great deal of ~Elea~ibillty in construcltlng ,: .
pi computer circuit board system it pueblo with- a design owe this electrical c:orlnec~or stem 'rho receptacle 10 can have any multiple so segments 20; for example, 5, 7, 11, etch, a dullard. plurality of receptacle 10 5 can be arranged owe the Matthew board --it- aajarent parallel relatiorlship a shown in Figure 1 and I
Ire desired, the receptacle cay extend beyond the mother Inboard 12 Jo that additional connector segment 20 it the receptacle 10 can be connected to 10 other type of plug portions and circuit connectors or element;. For example, the receptacle 10 can encompass the mother board a well as accommodate other totally different pow of Seneca tons located completely off the mother board.
Each of the segment 20 include a low or zero ir~sertîon force mech~ni~n for - stem 30~ the ,,, contact ranter 64 on the embodiment shown n Figure 6 are budged toward the contact member of the opposing row Jo that if they were on the r f fee state, they 20 should trike the pos~tionF: shown in phantom lo 'eke _ .
right-harldl receptacle 10 ox Figure 6. -Lowe low insertion force mechanism thereby employ Cody 33 and oily I
Whorl the cay 33 it rotated lo position - shown on the left-hand receptacle 10 of Figure 6 7 follower 34 moves upwardly to deflect the spring member 64 in cone row away f rum the spring member 64 on the opposing row. This allow the circuit board 11 to be 5 inward in the Luke 40 with a low or zero insertion force When the cam 33 it rotated Jo like posi~iQn~
shown in the r;ght-hand receptacle 10 of Figure 6, the follower 34 it lowered to release the contact member 64 80 that the contact portion 65 engage the rejective 10 contact pad 35 of the daughter board 11. Preferably, each segment includes it own separate f hollower member 34~ However, the cam member 33 preferably compare a unitary member or metal rod extending through all the segment 20 in the receptacle lo. The cam member 33 15 preferably ha an oblong or oval crow - cation.
The top surface 74 of the follower member it arrange to engage the spring contact: 64 to deflect them to pus thin apart or release them Jo that they can engage the laughter board 11. The fc>llo~er member 20 34 ha a It shaped cros~-~ection ire it upper porltionO
- Whey it it poisoned a in the left-hand rustily 10 in Figure 6 for swept of the I fault board- 11, toe by Tom owe tube l~hapedJ 75, err a top surface for I Nina byway at rcuit board 11 during ill~ertlon.
The lower portion so the follower member 34 crow Elton 76, ha a hook-like shape Jo that when the f of l owe r member r i wit Thor awn a in the n ght-hand receptacle 10 in Figure 6 it it held dowry in the 5 withdrawn position by engagement between the cam 33 and the hook-p~r'cion 76.
The segment body 63 include an outer segment support member 77 and sun inner segment support ~egmellt 78~ The spring contact 64 are held in place between 10 the no pective support member 77 and I The inner support member 78 alto eve to Support the cam and follower member 33 and 34, While the low or zero inrush force mechanism 30 ha been described by reference to the I embodiment particularly shown in figure my any diehard low inrush force mechan~m con be employed illu~rated by the Norris patent noted on the background of this pal icatlon. While it it prey erred in accordance with this invention, for the sprint 20 contact 3ae;nbers 64 it one row Jo be biased toward the prig contact number I in the opposing Roy if desired, a illustrated in the background of this inverltionV the opposite approach can ID@ employer. In such an oppos~Lt~ approach, thy follower member en Lo to deselect the spring contact 64 to have the contact -potion 65 engage the contact pod 35 or release the wring contact Jo that they are. spaced apart in their tree state A illus'cra$ed it Figure 7, actuating lever 38 if secured to the cam 33. Tbi~ enable the operator to rotate the cam 33 by moving the lever 3 8 between it respective open and cloyed petunia illustrated no Figure 4 and 5;, Alternatively, if desired; the lenqtb of the lever 3 8 earl be made much longer Jo that an operator need only reach to the top of the circuit board area in order to turn it. This embodiment Allah provide growler leverage on thy cam 33 for easier operation. eke another approach adapted for rote acutely it to ~ub~ti~ute a lever 79,, which by the use of a ~ui'cable linkage 80 p~votally convected to the erred 81 of the lever 79, can be remotely actuated For example, the linkage 8û can be brought out through a hole, not shown, in the top of the card housing 13 20 shown in Figure by pulling up on the linkage 80, the cam 33 I pi-voted to opera the receptacle for ire ion of the at rculî board 11. By pushillg down on the linkage 80, the reverse of the operation t~lces plus.
I
Referring now to Figure 4-5 and 7~16, the aligning and locking ye 22 and the! actuating system 36 will be de~crîbed in greater Doyle. A previously described, the at inning and locking ~y8tem I it 5 compared of locking lever 23 and 24. The body Hell 19 include a support extension 82 at it end 44. The lever I it pivotal supported about an extension bate 83 by mean of a split cylinder pin 84 inward through hole 85 and 86 ion the respective lever 23 and base 83.
A second extension support bate 87 include a squire hole 88 through which the cam 33 it inverted.
Prior to insertion of the cam 33, the actuating lever 37~ fork like projections 89, is positioned with a bate 87 between to leg of the fork like projection 89.
filet 90 in the foreclose projections 89 closely fit the cro~-section of the cam 33,. the cam 33 Lo held within the receptacle 10 after insertion. In erti3n through each of the respective segment 20 by means of a ply pun 91 inherited through hole 92 in the cam 33 within a slot 93 I bet illu~tY~ted in Figure 16. The pun 91 eve to lock the cam in place end toe cast in turn, err TV logic the actuating lever 37 in place.
referring not? Doria particularly to Tao actuating no locking ~;yE~tem~ 22 end 36 a toe eddy Lo 27 'I
of he body Hell I reverence it had to Fugue 7-11.
The locking lever 23 include a first progeny I
which is adapted to be inserted in an alignment hole 25 on one wide of the circuit board 11~ it further 5 include a equaled projection 29 which is adapted to be inverted in the notch 28 on one idea of the at Kowtow board 11. the looking lever 23 also include a folks portion I dew inked by the upper turf ace of one of the support leg OWE The follower portion 39 it) includes a notch 96. The actuating lever 37 include a tab 38 which acts a a cam. The follower portion 39 also includes a top portion 96 in operation when the lever 37 i in it vertical position as shown. The cam 33 disengage the segment follower 34 that the contacts 31 and 32 clove against the daughter Byrd on Thea position, the tab or cast 3 8 has engaged the ox portion 96 to pivot the lever 23 against the circuit board 11 Jo what tube projection 27 and 29 teat , .
on the respective hole 25 and phyla 28.
When the lever 37 it pivoted in the opposite direction to pollution a shown in Figure 4, toe cam tab I does not pivot the lever 23 until it enjoy the top portisD 97 deponed by the lower wide of the lot 96, Therefore toe lever 37 move f rum the fitOp portion 96 to the top portion 97, there it no movement owe the lever I . overrode the cam 33 it rotated f fore it clockwise actuation pushier lo islet; open actuation position The tab 38 engage the lop partisan 97 5 Burr the lever 37 it rotated lo it co~r.pleltely opera position,. Tory the t2lb 38 engage the Top portion 97, continued pivot on a downwardly direction of the lever 37 cause the lever 23 to pivot away loom the circuit Iboa'rdl thereby disengaging the projection 27 and 29 from the respective hole 25 and 810'!t 28.
Therefore when the lever 37 us moved from it cloyed position to it open position, the contact are first spaced ap~rlt under the action of the cam 33 and follower 34 and then the locking lever Jo disengaged in Lo a eerily fashion.
When the lever 37 it moved f row it open pox on as it Figure 4 to it cloyed position in Figure 5, a reverse err off ~peratiDn~ occur. When the lever 37 it in it full Opel posy lion,, the tab 38, 20 due to tube piloting action ox thy lever 23~, Navaho into the slot 96~. TherePore9 the upper wide Wylie ox . ye lo 9 B it engaged by the flab 38 of the Lowry 37 it beg to movement in an upwardly. dlr~ct~on. rho Cole the lever 23 to pivot about pin 8Jl into its lGckirl~ and aligrled position against the circuit board 11 with a small rotation of the lever. 37. This small rotation however is in~ufficierlt to rotate the cam 33 sufficiently agaisl~t the follower 34 to close 'eke 5 contact. A the lever 23 pot under the action of the pad 38 against the top portion I, the tab moves out of the slot 96 just a the lever 23 fully Allah and logic against the board 11. The lever 37 I
thereof ton f fee to continue rotation to it upward lo position against the stop 96 and thereby release the contact fur engagement with the circuit board Therefore, the action of the cam 38 and follower I it such that when the lever 37 it moved f rum it open position to the closed position, shown in figure 4 and 15 5, respectively the circuit board it first already and locked in place and then the contact are released to engage the circuit board In accordance with a prey erred embodiment of this invention, the aligning and locking stem I and 20 actuating 8y8teml}; 36 include the second at inning and locking lever 24 and a second actuating lever- 99. Thy second lever 24 and the second lever 99 ore outed at the oppo~ g end I of the body Hell 19. By Noah of a support e%ten~ioTI 100, the extent n 100 include support 101 about which the lever 24 p;votally supported by a ply it pin OWE It extends through hole 103 in the lever 24 and 104 in the base 101. A
previously described, the cam rod 33 extend throl3gh a slot 93 terminatirlg in a Corey hole 105 in a second support bye 106 in the extension 100 The second actuating lever 99 includes a lot 90 which has a crow section closely corresponding to the crow cation of the cam 33., The lever 99 it positioned about the cram 33 between the lever 4 and the upper base extension 106. The lever 99 inlays tab 38 corresponding the tab of the lever 37.
Similarly the lever 24 include a follower portion 39 corresponding to the follower portion of the lever 23.
15Tbe follower portion include a lo including top por~orl~ go and 98. It also includes top portion I.
The operation of fever 99 it tied to the operator of lever 37 by the cam 33. The inner action ox lever 99 with the lever 24 via the tab 333 and oilier 39 it identical Jo the inner action previously de~crlbed with the respect to the lever 37 and 23 zlnd~
Hereford not described again when tie lever 37 moved between it respective open and Clyde potion, the fever 99 move between corre~pondi319 .
potion and interacts with the lever 24 in the same manner a the lever 37 interact with the lever 23.
The projections 27 which serve to align and lock the at rcuit board 11 in the receptacle lo are 5 tapered Jo that a slight misalignment of the circuit board 11 doe not prevent at ignment and locking of Lowe hoard into the receptacle. The taper ox the projection 27 verve to move the board into it properly aligned position. It should be apparent the the colltact8 67 of the receptacle 10 cannot be closed unwell the circuit board 11 it properly locked and aligned within the receptacle. Any misalignment would prevent the projection 27 and 29 f rum being inverted in the respective alignment hole 25 and slot 280 15 This, in turn would prevent the pivoting of the lever 23 and 24 into their sully and aligned option The ._ failure of those levers to pivot o their fully aligned and locked potion royalty in the tab 38 of the lever 37 of 99 engaging the stop portion 96 on the 20 re~pecti~Te followers 39 Thy prevents further pivoting of the lever 37 and the cam 33t- thereby preventln5~ engagement of the contact to the circuit board 11., urethra necessary what the projections or alignment pin. 27 and 29 on both idea- of the - receptacle 10 be seated in their re~pectiYe Hillel 25 and slow 28 in order to completely clove the contacts 67 so Tao receptacle llD9 Thus, the receptacle lever 37 S cannot be fully closed to the po~itlon shown in Figure 5 unless both corners of the circuit board 11 are fly seated in the connector housing.. In the event ox a rai~alignment, the operator cannot clove the handle 37 completely and mutt readjust the circuit board 11 Jo 10 that the alignment can take place. When the lever 37 it in the position of Figure 5, the circuit board cannot be pulled out off the receptacle lo out the wide of the receptacle 10~ unless the handle 37 first pivoted to it open p~Eitis:n a shown in Figure 4.
It Schloss be underwood that the foregoing decoration it oxlly lllu~trative of 'eke invention.
Voyeur alternative and modification Sheehan be devised by those sidled in eke ark without departing $ wreck toe invention. Accordirlgly, the present invention it 20 irltended to embrace all such alternatives, modification and Yearns which full within the scope of the appended Lomb.,
Claims (23)
1. In a low insertion force electrical connector system comprising an electrical connector receptacle having a plurality of electrical contacts arranged in at least two opposing rows and a low insertion force mean selectively spacing apart the electrical contacts in one row from the electrical contacts in an opposing row to allow the insertion of an electrical plug member with a low insertion force and also providing engagement of said contact in said one and said opposing rows with said plug member so that said receptacle contacts make electrical connection with desired contact of said plug member;
the improvement wherein, said electrical connector systems further comprises:
(a) means for aligning and locking said electrical plug member after inser-tion between one and opposing rows of contacts of said electrical con-nector receptacle; and (b) means for actuating said low inser-tion force means and said aligning and locking means in a multi-phase operation wherein, prior to inser-tion of said plug member into said receptacle, said actuating means is adapted go actuate said low insertion force means to selectively space apart said rows of electrical contacts and wherein after insertion of said plug member between said rows of contacts of said receptacle said actuating means is adapted to actuate serially first said aligning and locking means to align and lock said plug member within said receptacle and then said low insertion force means to provide engagement of said receptacle contacts with said desired contacts of said plug member.
the improvement wherein, said electrical connector systems further comprises:
(a) means for aligning and locking said electrical plug member after inser-tion between one and opposing rows of contacts of said electrical con-nector receptacle; and (b) means for actuating said low inser-tion force means and said aligning and locking means in a multi-phase operation wherein, prior to inser-tion of said plug member into said receptacle, said actuating means is adapted go actuate said low insertion force means to selectively space apart said rows of electrical contacts and wherein after insertion of said plug member between said rows of contacts of said receptacle said actuating means is adapted to actuate serially first said aligning and locking means to align and lock said plug member within said receptacle and then said low insertion force means to provide engagement of said receptacle contacts with said desired contacts of said plug member.
2. A system as in Claim 1 wherein said actuating means is adapted to serially actuate said low insertion force means and aligning and locking means in a reverse fashion to first spaace apart said receptacle contacts and to then unlock said plug member to allow said plug member to be removed from said receptacle with a low force.
3. A system as in Claim 2 wherein said plug member comprises a portion of an electronic module or a first circuit board.
4. A system as in Claim 3 wherein said receptacle is mounted on a second circuit board and electrically connected therewith.
5. A system as in Claim 4 wherein each of said one and opposing rows of receptacle contacts comprises alternating high and low contacts.
6. A system as in Claim 5 wherein respective high contacts in said one row oppose respective low contacts in said opposing row and wherein respective contact in said one row oppose respective high contacts in said opposing row.
7. A system aas in Claim 6 wherein said receptacle contacts comprise first portions of respective spring members wherein said low insertion force means comprises cam means and follower means for deflecting or undeflecting spring members to provide said spacing apart or said engagement of said receptacle contact,.
8. A system as in Claim 7 wherein said aligning and locking means comprises at least one first lever means pivotally supported by said receptacle, said lever means including at its free end at least one first projection which is adapted to be pivotally inserted into a corresponding alignment hole in said plug member.
9. A system as in Claim 8 wherein said aligning and locking means includes at least two of said first lever means respectively arranged at opposing ends of said receptacle.
10. A system as in Claim 9 wherein said actuating means comprises two section lever means respectively secured to said cam means at opposing ends thereof and of said receptacle and wherein said second lever means includes a tab portion for engaging said first lever means to pivot said first lever means between respective locking and unlocking position.
11. A system as in Claim 10 wherein said tab portion comprises a cam and wherein said first lever means includes a follower portion contoured to provide said respective serial actuations.
12. A system as in Claim 11 wherein said receptacle is configured so that said plug member can be inserted therein either longitudinally or transversely of a direction in which said one and opposing rows of receptacle contacts extend.
13. A system as in Claim 12 wherein said first projection of said first lever means is adapted to align said plug member transversely of said direction in which said one and opposing rows of said receptacle contacts extend and further including means for obstructing the insertion of said plug member into said connector system when said means for actuating said low insertion force means is actuated.
14. A system as in Claim 13 wherein said receptacle includes a base wall limiting the depth to which said plug member can be inserted in said receptacle, said base wall comprising part of said follower means and a first end wall and wherein said second projection defines a second end wall of said receptacle.
15. A system as in Claim 14 wherein said spring members are arranged to bias said receptacle contacts into engagement with said plug member and wherein said low force insertion means is adapted to deflect said spring members to space apart said respective rows of receptacle contacts.
16. A system as in Claim 14 including a plurality of receptacles mounted in a parallel spaced relationship to said second circuit board with each of said receptacles having respectively associated therewith said low insertion force means, said aligning and locking means and said actuating means.
17. A system as in Claim 14 wherein each of said spring members includes a second contact portion at an end thereof opposed to said first contact portions, said second contact portions being arranged in two opposing rows in said receptacle and being biased outwardly from the bottom thereof, said second contact portions being adapted to engage corresponding desired contacts of said second circuit boards.
18. A system as in Claim 14 wherein said receptacle includes a body shell member and a plurality of contact segments with each said segment including said one and opposing rows of receptacle contacts and wherein said segments are supported in a floating manner within said shell member, each of said segments including an alignment projection for insertion in a respective alignment hole in said second circuit boards.
19. A system according to Claim 18 wherein said follower means comprises a separate follower member supported by each said segment and wherein said cam means comprises a unitary member extending through all of said segments.
20. A system as in Claim 19 including a plurality of receptacles mounted in a parallel spaced apart fashion to said second circuit board with each of said receptacles having respectively associated therewith said low insertion force means, said aligning and locking means and said actuating means.
21. A system as in Claim 20 wherein each of said spring members includes a second contact portion at an end thereof opposed to said first contact portion said second contact portion being arranged in two opposing rows in said receptacle and being biased outwardly from the bottom thereof, said second contact portions being adapted to engage corresponding desired contacts of said second circuit board.
22. A system as in Claim 21 wherein said spring members are arranged to bias said respective contacts into engagement with said plug member and wherein said low force insertion means is adapted to deflect said spring members to space apart said respective rows of receptacle contact.
23. A system as in Claim 22 further including means for operating said actuating means remotely of said second circuit board.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000469824A CA1231147A (en) | 1984-12-11 | 1984-12-11 | Low insertion force circuit board connector assembly |
| CA000548840A CA1252218A (en) | 1984-12-11 | 1987-10-07 | Circuit board with staggered rows of contact pads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000469824A CA1231147A (en) | 1984-12-11 | 1984-12-11 | Low insertion force circuit board connector assembly |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000548840A Division CA1252218A (en) | 1984-12-11 | 1987-10-07 | Circuit board with staggered rows of contact pads |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA1231147A true CA1231147A (en) | 1988-01-05 |
| CA1252218C CA1252218C (en) | 1989-04-04 |
Family
ID=4129354
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000469824A Expired CA1231147A (en) | 1984-12-11 | 1984-12-11 | Low insertion force circuit board connector assembly |
| CA000548840A Expired CA1252218A (en) | 1984-12-11 | 1987-10-07 | Circuit board with staggered rows of contact pads |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000548840A Expired CA1252218A (en) | 1984-12-11 | 1987-10-07 | Circuit board with staggered rows of contact pads |
Country Status (1)
| Country | Link |
|---|---|
| CA (2) | CA1231147A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2341675T3 (en) | 1998-05-18 | 2010-06-24 | Seiko Epson Corporation | PRINTING APPLIANCE OF INK JET AND CORRESPONDING INK CARTRIDGE. |
-
1984
- 1984-12-11 CA CA000469824A patent/CA1231147A/en not_active Expired
-
1987
- 1987-10-07 CA CA000548840A patent/CA1252218A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CA1252218C (en) | 1989-04-04 |
| CA1252218A (en) | 1989-04-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 20050105 |