EP0654870B1 - Haltevorrichtung für IC-Karteverbinder - Google Patents

Haltevorrichtung für IC-Karteverbinder Download PDF

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Publication number
EP0654870B1
EP0654870B1 EP94117817A EP94117817A EP0654870B1 EP 0654870 B1 EP0654870 B1 EP 0654870B1 EP 94117817 A EP94117817 A EP 94117817A EP 94117817 A EP94117817 A EP 94117817A EP 0654870 B1 EP0654870 B1 EP 0654870B1
Authority
EP
European Patent Office
Prior art keywords
mounting
peg
surface mount
substrate
connector
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 - Lifetime
Application number
EP94117817A
Other languages
English (en)
French (fr)
Other versions
EP0654870A3 (de
EP0654870A2 (de
Inventor
Emanuel G. Banakis
Kenneth F. Janota
Harold K. Lang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Molex LLC
Original Assignee
Molex LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Molex LLC filed Critical Molex LLC
Publication of EP0654870A2 publication Critical patent/EP0654870A2/de
Publication of EP0654870A3 publication Critical patent/EP0654870A3/de
Application granted granted Critical
Publication of EP0654870B1 publication Critical patent/EP0654870B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/7005—Guiding, mounting, polarizing or locking means; Extractors
    • H01R12/7011—Locking or fixing a connector to a PCB
    • H01R12/7064—Press fitting

Definitions

  • the invention relates to an electrical connector for mounting at an edge of a circuit substrate.
  • An electrical connector of that kind is known from DE-U-86 30 076 and has three rows of terminals at the forward mating face which form three rows of mount contact portions at the rearward terminating face. There are also two mounting pegs on each lateral side of the connector, which straddle the contact portions of the lowermost terminal row only, whereas the middle and uppermost terminal rows have their contact portions arranged between corresponding mounting pegs and rearwardly thereof, respectively.
  • Mounting pegs having partly round cross-sections are known from GB-A-2,268,003 with four flat side surfaces and four rounded side surfaces.
  • the area of the rounded side surfaces is relatively large so that the problem of reducing manufacturing tolerances is not solved by such a mounting peg.
  • a surface mount connector having two different shaped terminals is known from GB-A-2,256,755.
  • the terminals are arranged in two passages, one above the other, and terminate result in a single elongate array of contacts to be mounted to the traces of the circuit board.
  • the connector housing has ends with respective arms each having a pair of pegs. The pegs serve fixing purposes during soldering of the contacts.
  • the second peg of the pair is a pin arranged in the row of contacts and is soldered to the circuit board in the same way as the contacts of the terminals. There is no straddle effect from the pegs to the row of contacts.
  • a pair of pegs at flanges of connector housing is known from EP-A-0 182 070.
  • the type of terminals and their arrangement is not mentioned.
  • IC cards or packs such as memory cards
  • an underlying electronic apparatus or storage device such as a word processor, personal computer or other electronic apparatus.
  • the data stored in the IC card is transferred to the electronic apparatus.
  • the IC or memory cards are typically portable instruments which may be readily inserted and extracted from a connector apparatus as required, and are used with such connector apparatus for removably coupling the card to a printed circuit board of the underlying apparatus, for instance.
  • An IC card conventionally includes a rectangular frame which receives a circuit substrate, and on or around which is mounted a panel or cover that encloses the circuit substrate therewithin.
  • the circuit substrate of an IC card conventionally comprises a generally planar support with at least one electrical component mounted thereon.
  • the electrical component(s) may include semi-conductor devices, integrated circuits, batteries or the like.
  • a surf ace mounted receptacle connector is electrically and mechanically coupled to an edge of the circuit substrate.
  • the receptacle connector includes receptacle terminals mounted therein having surface mount tails with contact portions adapted to be surface mounted to corresponding circuit traces on one or both sides of the circuit substrate.
  • Each receptacle terminal also includes a receptacle portion for mating with contacts of the main electronic apparatus, such as mating with the contacts of a header connector mounted on a printed circuit board of the main electronic apparatus.
  • the receptacle connector is surface mounted to the circuit substrate, and since subsequent to such processing the circuit substrate is assembled to the frame and cover, it is important that the connector be positioned correctly with respect to the substrate, that is, the surface mount tails of the receptacle terminals must be accurately positioned and the contact portions connected to their corresponding circuit traces, so that proper electrical connection is made and so that the connector/substrate assembly fits within the frame. Furthermore, it is often desirable, if not necessary, to hold the connector in place prior to and during the surface mounting process, so that movement prior to or surface tension during the process does not result in an inaccurately positioned connector.
  • One type of memory card receptacle connector configuration utilizes single-sided receptacle terminals wherein the contact portions of the surface mount tails are adapted to be coupled to circuit traces on only one side of the circuit substrate. This configuration allows a "toptobottom” direction of assembly of the connector to the substrate, thereby facilitating robotic "pick-and-place” assembly.
  • One way of processing a connector having a single-sided terminal configuration is to simply place it on top of the substrate. Often a connector of this type will include a locating peg or other similar feature to correctly position the connector with respect to the substrate.
  • Another processing method overcomes this dependence on manufacturing control of coplanarity by using a single press-fit or retention peg on each side of the housing to hold the connector to the substrate, which, by design, presses the contact portions of the surface mount tails to the board, or "preloads" the contact portions.
  • these contact portions exert a force on the substrate, and since by the nature of memory card receptacle connectors the surface mount tails are outboard of the housing along only a single edge of the housing, the force exerted by the tails acts to rock or rotate the housing from its desired position, pivoting about the retention peg.
  • press-fit or retention pegs are correspondingly small and, therefore, integrally molded compliant pegs or complicated peg shapes are generally not manufacturable.
  • the miniature nature of the pegs magnifies the manufacturing tolerances, i.e. the change in peg diameter or size is a larger percentage of the peg size itself. Accordingly, an undersized peg may not provide any interference fit in an oversized substrate hole, and an oversized peg may provide too much interference in an undersized hole, resulting in ineffective and excessive insertion forces, respectively, as discussed above.
  • An object of the invention is to provide an electrical connector of the kind referred-to above which can be safely mounted onto the surface of a circuit board at an edge thereof.
  • the invention is defined in claim 1.
  • Claims 2 through 4 contain further developments of the invention in connection with an improved mounting peg system.
  • the connector of the invention includes a dielectric housing having a forward mating face, a rearward terminating face, and a plurality of terminal-receiving passages therethrough.
  • a plurality of conductive terminals are received in the passages.
  • Each terminal includes a surface mount tail projecting outwardly from the housing from the rearward terminating face and having a surface mount contact portion at a distal end thereof for resiliently engaging an appropriate circuit trace on the substrate.
  • the surface mount contact portions are disposed in a generally coplanar elongate array.
  • a mounting arm is provided on each side of the housing for mounting to the surface of the circuit substrate. Generally, mounting pegs project from a bottom mounting face of the mounting arms.
  • the invention is directed to an improvement in the mounting pegs.
  • a pair of mounting pegs having a generally rectangular cross-section project from the bottom mounting face of the mounting arm for insertion into corresponding round mounting holes in the circuit substrate.
  • Each pair of mounting pegs straddles the elongate array of surface mount contact portions to balance the uneven forces created by the single-sided receptacle connector and to prevent the "rocking" that may occur in the case of a single mounting peg configuration.
  • each peg has a transverse dimension between diagonal corners of the rectangular peg configuration greater than the diameter of the respective round hole in the circuit substrate while the transverse dimension between adjacent corners of the peg is less than the diameter of the round holes, thereby establishing an interference or press fit between the receptacle connector and the circuit substrate.
  • the rectangular peg configuration permits an acceptable interference fit within the round holes of the substrate for a wide range of dimensional tolerances, and holds or "pre-loads" the surface mount contact portions to their respective circuit traces to ensure a good electrical connection.
  • the dielectric housing is molded of plastic material, and the mounting pegs are molded integrally therewith.
  • the pegs have a square cross section, and the corners of the plastic pegs are compliant or deformable for insertion into the generally round holes of the circuit substrate.
  • an IC card which is provided as a data input device, such as a memory card, for connection to an electronic apparatus or storage device, such as a word processor, personal computer or other electronic apparatus (not shown).
  • the data stored in memory card 10 is transferred to the electronic apparatus through the terminals within a receptacle connector, generally designated 12, which is edge mounted to a circuit substrate, generally designated 14, on which data storage units are mounted or stored.
  • receptacle connector 12 is elongated and mounts a plurality of input terminals 16.
  • the terminals mechanically and electrically engage contact pads 18 on a surface 20 of circuit substrate 14.
  • Various electrical components or circuit elements 22 are surface mounted on surface 20, along with circuit traces 24 leading to contact pads 18 at the leading or front edge of the substrate. This edge is coupled to elongate receptacle connector 12, and the receptacle connector is interconnectable with an electrical connector, such as a header connector, mounted on a printed circuit board of the electronic apparatus to which data stored on circuit substrate 14 is transferred.
  • circuit substrate 14 is generally conventional, and, consequently, the depiction of the circuit substrate is somewhat schematic. However, it should be understood that, although electrical components 22 are shown in the drawings as being of uniform shape and size, the components will generally vary, and may comprise semi-conductor devices, batteries, and other parts of integrated circuits, all mounted on surface 20 of the circuit substrate.
  • memory card 10 includes a frame, generally designated 30, which includes an opening 32 in a top surface 33 thereof for receiving circuit substrate 14.
  • the frame includes support means, generally designated 34, facing opening 32 for supporting circuit substrate 14 within the frame in the orientation of Figure 1.
  • a top panel or cover 36 is adapted to be fixably secured to top surface 33 for closing opening 32 and enclosing circuit substrate 14 within the frame 30.
  • the frame is unitarily molded of dielectric material, such as plastic, and a plurality of cross braces 35 join the sides of the frame to provide integrity to the frame structure.
  • the frame also defines a bottom opening 37 in a bottom surface 39 of frame 30, which is closed by a bottom panel or cover 38.
  • receptacle connector 12 includes a dielectric housing 40 having a forward mating face 42, a rearward terminating face 43, and a plurality of terminal-receiving passages 44 arranged in two generally parallel rows and extending between the forward mating face and the rearward terminating face therethrough for receiving receptacle terminals 16.
  • An end wing or mounting arm 46 is located at each end of the housing 40 and includes a bottom mounting face 47 which mounts on the top surface 20 of circuit substrate 14 adjacent an edge 48 thereof.
  • Each receptacle terminal 16 includes a receptacle portion proximate the forward mating face of the housing, and a surface mount tail 50 which projects from rearward terminating face 43 and extends outwardly therefrom.
  • the surface mount tails 50 each include a surface mount contact portion 52 for mechanically and electrically engaging contact pads 18 on the top surface 20 of the circuit substrate, adjacent edge 48.
  • contact portions 52 of surface mount tails 50 project below bottom mounting face 47 of receptacle connector 12.
  • surface mount tails 50 extend in a generally parallel elongate array outwardly of housing 40 of the receptacle connector.
  • the contact portions 52 form a generally coplanar elongate array, as will be seen hereinafter.
  • the improved mounting means of the invention is incorporated in a pair of mounting pegs 54 formed on each mounting arm, which are press fit or force fit into a respective pair of mounting holes 56 (Fig. 2) in circuit substrate 14. As seen in Figures 3 and 4, one pair of pegs depend from the bottom mounting face 47 of each mounting arm 46 of housing 40. The parallel array of the surface mount tails 50 of terminals 16 also are clearly seen in Figures 3 and 4.
  • the contact portions 52 of the surface mount tails 50 project below the bottom mounting face 47 of mounting arms 46 of the connector housing.
  • the terminals are conventionally formed of stamped and formed sheet metal material, whereby the surface mount tails 50 are flexible and contact portions 52 exert forces against their respective contact pads when the connector is surface mounted to the circuit substrate.
  • Receptacle portions 58 of the terminals are shown disposed in the two row arrangement described above.
  • the top row of terminals 16 have different surface mount tail configurations than the bottom row terminals in order to effect a single parallel array of surface mount tails 50 while at the same time using a two row array of receptacle portions 58.
  • each pair of mounting pegs 54 at each opposite end of the connector "straddles" the elongate array of contact portions of the surface mount tails. That is, one of the pair of mounting pegs 54 at each opposite end of the connector is positioned forward of the contact portions 52 of the surface mount tails 50 toward the forward mating face 42 of the housing, and the other of the pair of pegs is positioned rearward of the contact portions 52 of the surface mount tails 50 away from the forward mating face 42 of the housing.
  • mounting pegs 54 have generally rectangularly-shaped cross-sections to provide an interference fit within a round hole, which serves to hold the connector and, in particular, the contact portions 52 of the surface mount tails 50 to the substrate to assure a good solder connection.
  • the mounting pegs are square in cross-section. Therefore, the generally rectangular configuration defines four corners 60 for each peg (see Fig. 8). The square pegs are forced into the round mounting holes 56 of circuit substrate 14.
  • the transverse dimension between the diagonal corners of mounting pegs 54 is greater than the transverse dimension or diameter of the round holes 56, while the transverse dimension between adjacent corners is less than the diameter of the round holes, thus providing an interference fit between the receptacle connector and the circuit substrate generally at each corner of the square-shaped peg.
  • receptacle connector 12 of memory card 10 can be very small in size, and, therefore, manufacturing tolerances for tiny mounting pegs, such as pegs 54, and for mounting holes 56, are considerably magnified.
  • any change in the transverse dimension or diameter of a mounting peg or hole is a large percentage of the size of the peg or hole, itself.
  • the corners of the peg are outside the hole in almost any undersize or oversize condition, i.e. within a given tolerance range of both peg size and hole size. Therefore, since only the corners 60 of the peg 54 are outside the hole, the corners deform when force-fit into round holes 56.
  • FIG. 8 shows a variance in the size of a given mounting peg with respect to a round hole 56.
  • peg 54' and hole 56' in Figure 8 represent minimal interference between a mounting peg and a round hole
  • peg 54 and hole 56 represent a nominal condition
  • peg 54'' and hole 56'' represent maximum interference.
  • the corners of the pegs can deform, or at least become compliant, upon force fitting any of the pegs into any of the round mounting holes.
  • Figures 9-11 are similar to Figures 5-7, except that the receptacle connector is shown surface mounted to circuit substrate 14, with rectangular mounting pegs 54 press fit into mounting holes 56. Again, it can be seen particularly in Figure 9 how each pair of pegs straddle the elongate array of contact portions 52 of surface mount tails 50. Figure 9 also shows how the contact portions have been biased upwardly or "pre-loaded” in the direction of arrow "A" to create forces against the substrate and to assure connection between the contact portion 52 and the appropriate contact pad 18 of circuit substrate 14. Without the provision of both mounting pegs straddling or supporting the elongate array of contact portions 52, the receptacle connector 12 would have a tendency to "rock", and the connector would be unstable prior to and during processing.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)

Claims (4)

  1. Elektrischer Verbinder (12) zur Montage an einem Rand eines Schaltkreissubstrats (14), das eine Oberseitenfläche (20) mit sich darauf befindenden Oberflächenkontakteinrichtungen (18, 24) aufweist, mit folgenden Merkmalen:
    ein dielektrisches Gehäuse (40) weist eine vordere Kupplungsseite (42), eine rückwärtige Anschlußseite (43) und eine Vielzahl von Anschlußklemmenaufnahmekanälen (44) auf, die benachbart zueinander angeordnet sind und sich zwischen der vorderen Kupplungsseite (42) und der rückwärtigen Anschlußseite (43) erstrecken;
    eine Vielzahl leitfähiger Anschlußklemmen (16) werden in den Kanälen (44) aufgenommen, jede umfaßt einen Oberflächenmontage-Endabschnitt (50), der von der rückwärtigen Anschlußseite (43) des Gehäuses (40) hervorragt und sich außerhalb davon erstreckt, wobei jeder Oberflächenmontage-Endabschnitt (50) einen Oberflächenmontage-Kontaktabschnitt(52) aufweist, der im entlasteten Zustand unter die Oberseitenfläche (20) des Substrats (14) ragt, um elastisch auf den Oberflächenkontakteinrichtungen (18, 24) anzuliegen;
    ein erster integral angegossener Montagestift (54) ragt von einer Unterseitenmontagefläche (47) hervor, um in eine erste korrespondierende Montageöffnung (56) im Schaltkreissubstrat (14) eingesetzt zu werden;
    ein zweiter integral angegossener Montagestift (54) ragt von der Unterseitenmontagefläche (47) hervor, um in eine zweite korrespondierende Montageöffnung (56) im Schaltkreissubstrat (14) eingesetzt zu werden;
    dadurch gekennzeichnet,
    daß das Gehäuse (40) ferner einen Montagearm (46) an jeder seiner Enden für eine Montage an der Oberseitenfläche (20) des Substrats (14) umfaßt;
    daß nur zwei Reihen mit den Kanälen (44) und Anschlußklemmen (16) vorgesehen sind, wobei die Oberflächenmontage-Endabschnitte (50) eine Anschlußklemmenreihe einer Konstruktionsweise aufweisen, die sich von der Konstruktion der Anschlußklemmen der anderen Reihe unterscheiden;
    daß die Oberflächenmontage-Kontaktabschnitte (52) beider Anschlußklemmenreihen ein einziges längliches Feld zwischen den Montagearmen (46) bilden; und
    daß der erste Montagestift (54) vor dem langgezogenen Feld der Oberflächenmontage-Kontaktabschnitte (52) angeordnet ist, wohingegen der zweite Montagestift (54) hinter dem in die Länge gezogenen Feld angeordnet ist, so daß der erste und zweite Montagestift (54) das längliche Feld der Oberflächenmontage-Endabschnitte überspannt.
  2. Elektrischer Verbinder nach Anspruch 1, bei dem die Montagestifte einen im wesentlichen rechteckförmigen Querschnitt aufweisen.
  3. Elektrischer Verbinder nach Anspruch 2, bei dem die Montagestifte einen im wesentlichen quadratförmigen Querschnitt aufweisen.
  4. Elektrischer Verbinder nach Anspruch 2 oder 3, bei dem die Montageöffnung (56) eine runde Öffnung ist und jeder Montagestift (54) eine Querabmessung zwischen diagonalen Ecken (60) aufweist, die größer ist als der Durchmesser der Öffnungen (56), um so eine Preßpassung zwischen Stift (54) und Öffnung (56) herbeizuführen.
EP94117817A 1993-11-22 1994-11-11 Haltevorrichtung für IC-Karteverbinder Expired - Lifetime EP0654870B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15617193A 1993-11-22 1993-11-22
US156171 1993-11-22

Publications (3)

Publication Number Publication Date
EP0654870A2 EP0654870A2 (de) 1995-05-24
EP0654870A3 EP0654870A3 (de) 1996-08-21
EP0654870B1 true EP0654870B1 (de) 2000-02-09

Family

ID=22558411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94117817A Expired - Lifetime EP0654870B1 (de) 1993-11-22 1994-11-11 Haltevorrichtung für IC-Karteverbinder

Country Status (8)

Country Link
EP (1) EP0654870B1 (de)
JP (1) JP3016857U (de)
KR (1) KR0170025B1 (de)
DE (1) DE69422955T2 (de)
HK (1) HK1012786A1 (de)
MY (1) MY131562A (de)
SG (1) SG52319A1 (de)
TW (1) TW323002U (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG111912A1 (en) * 2000-07-18 2005-06-29 Molex Inc Electrical connector

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6254421B1 (en) * 1998-06-29 2001-07-03 The Whitaker Corporation Connector assembly having pivoting wire carrier with position detents
DE102007024265A1 (de) 2006-06-28 2008-01-03 Weidmüller Interface GmbH & Co. KG Elektrisches Modul
JP7231098B1 (ja) 2022-06-30 2023-03-01 Smk株式会社 電気コネクタ、電気コネクタの製造方法及び電気コネクタの実装方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4710132A (en) * 1984-11-12 1987-12-01 Siemens Aktiengesellschaft Electrical plug connector strip
DE8630076U1 (de) * 1986-11-10 1987-01-15 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
JPH04136888U (ja) * 1991-06-14 1992-12-21 日本圧着端子製造株式会社 表面実装コネクタ
US5161999A (en) * 1992-03-18 1992-11-10 Amp Incorporated Surface mount electrical cohnnector and shield therefor
DE4218431C2 (de) * 1992-06-04 1995-04-20 Cannon Electric Gmbh Einrichtung zur Verbindung eines Steckverbinders mit einer Leiterplatte

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG111912A1 (en) * 2000-07-18 2005-06-29 Molex Inc Electrical connector

Also Published As

Publication number Publication date
HK1012786A1 (en) 1999-08-06
KR0170025B1 (ko) 1999-03-30
EP0654870A3 (de) 1996-08-21
KR950016464A (ko) 1995-06-17
DE69422955D1 (de) 2000-03-16
SG52319A1 (en) 1998-09-28
DE69422955T2 (de) 2000-10-05
MY131562A (en) 2007-08-30
EP0654870A2 (de) 1995-05-24
JP3016857U (ja) 1995-10-09
TW323002U (en) 1997-12-11

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