EP0469845A1 - Lock pin and electrical connector using the same - Google Patents

Lock pin and electrical connector using the same Download PDF

Info

Publication number
EP0469845A1
EP0469845A1 EP91306956A EP91306956A EP0469845A1 EP 0469845 A1 EP0469845 A1 EP 0469845A1 EP 91306956 A EP91306956 A EP 91306956A EP 91306956 A EP91306956 A EP 91306956A EP 0469845 A1 EP0469845 A1 EP 0469845A1
Authority
EP
European Patent Office
Prior art keywords
lock pin
melted solder
circuit board
printed circuit
arm
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.)
Withdrawn
Application number
EP91306956A
Other languages
German (de)
English (en)
French (fr)
Inventor
Akio Yamada
Kanzaburo Uchida
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.)
DDK Ltd
Original Assignee
DDK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DDK Ltd filed Critical DDK Ltd
Publication of EP0469845A1 publication Critical patent/EP0469845A1/en
Withdrawn legal-status Critical Current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
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
    • H01R12/58—Fixed connections for rigid printed circuits or like structures characterised by the terminals terminals for insertion into holes
    • 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
    • H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
    • H01R12/716—Coupling device provided on the PCB
    • 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
    • H01R12/72—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
    • H01R12/722—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures coupling devices mounted on the edge of the printed circuits
    • H01R12/724—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures coupling devices mounted on the edge of the printed circuits containing contact members forming a right angle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6591—Specific features or arrangements of connection of shield to conductive members
    • H01R13/6594—Specific features or arrangements of connection of shield to conductive members the shield being mounted on a PCB and connected to conductive members
    • H01R13/6595—Specific features or arrangements of connection of shield to conductive members the shield being mounted on a PCB and connected to conductive members with separate members fixing the shield to the PCB
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections

Definitions

  • This invention relates to a lock pin for fixing an electrical element by means of soldering to a panel of an electronic appliance or a board therein (referred to hereinafter as a "mounting plate"), and more particularly to an electrical connector having such a lock pin utilized for grounding an electromagnetic shield of the connector.
  • the electrical element in this case includes a relay, a switch, an electrical connector, an optical fiber connector, a light reception or emission module having a housing accommodating therein a semiconductor for receiving or emitting light beams, a terminal block for connecting lead wires and an electronic appliance, and the like.
  • lock pins are generally used (designated by numerals 3 and 4 in Fig. 1). Such lock pins are permanently fixed to the mounting plate by soldering. The lock pins are also often used as grounding lines of the electrical element.
  • soldering operation is usually automatized.
  • a paste-like solder is previously coated on the metal pattern of a printed circuit board and an electrical element is arranged on the coated solder. Thereafter, the entire assembly is heated to cause the solder to flow into clearances between the portions to be soldered.
  • an electromagnetically shielded electrical connector has been used as an electrical element to be fixed to a mounting board, for example, shown in a perspective view of Fig. 1.
  • a metal front shell 2 is fixed to a connector main body 1 to surround it so that both ends 1a of the connector main body 1 are embraced by both ends 2a of the metal front shell 2.
  • a one-leg lock pin 3 and a two-leg lock pin 4 are arranged at and clamped to both ends 2a of the metal front shell 2 by means of set screws (not shown) extending through screw threaded apertures 3b and 4b formed in the lock pins 3 and 4, respectively.
  • set screws not shown
  • the connector main body 1, the metal front shell 2 and the lock pins 3 and 4 are assembled as an integral unit.
  • hook portions 3b and 4b of the lock pins 3 and 4 are engaged with the front shell 2 to ensure the electrical connections between the front shell 2 and the lock pins 3 and 4.
  • the arm 3c of the one-leg lock pin 3 is inserted into one connector mounting aperture 5a provided in a ground wiring pattern of the printed circuit board 5 so that the anchoring projection 3d of the one-leg lock pin 3 at its free end is engaged with the ground wiring pattern on the rear side of the printed circuit board 5.
  • the assembly is turned about the engaged portion of the one-leg lock pin 3 toward the printed circuit board to force the two-leg lock pin 4 into the other connector mounting aperture 5b provided in the ground wiring pattern 5c of the printed circuit board 5 as shown in Fig. 2b.
  • the two arms 4c and 4c′ of the lock pin 4 are at once forced toward each other against their spring force during passing of the anchoring projections 4d and 4d′ of the lock pin 4 through the connector mounting aperture 5b.
  • the arms 4c and 4c′ are released and engaged with the ground wiring pattern 5c on the rear side of the printed circuit board 5 so that the connector is temporarily mounted on the printed circuit board 5.
  • the arms 3c, 4c and 4c′ of the lock pins 3 and 4 together with contact tails inserted in mounting apertures provided in a wiring pattern are fixed by soldering to the ground wiring pattern provided in the mounting apertures 5a and 5b of the printed circuit board 5.
  • the electrical connector is permanently fixed to the printed circuit board, and at the same time the front shell 2 is grounded to shield the connector electromagnetically.
  • soldering the electrical connector to the printed circuit board for example, a paste-like solder is previously coated on the proximity of surfaces to be soldered and the whole assembly is then heated in a heating apparatus to cause the paste-like solder to flow so as to be distributed over the areas to be soldered. In this method, however, frequently the lock pins 3 and 4 are not electrically connected to or incompletely connected to the the ground wiring pattern of the printed circuit board 5.
  • a paste-like solder is coated on around the connector mounting apertures 5b of the printed circuit board 5 as shown in Fig. 3a and heated to be melted in a heating apparatus. If the mounting apertures 5a and 5b of the printed circuit board 5 are comparatively larger than the lock pins 3 and 4, the melt solder tends to agglomerate with the aid of its surface tension to form risen formations which do not flow into the mounting aperture 5a or 5b as shown in Fig. 3b.
  • the induction protrusion extends parallel with the surface of the mounting plate and substantially in contact with the surface of the mounting plate when the lock pin is secured to the mounting plate.
  • the induction protrusion when a melted solder is positioned between the surface of the mounting plate and the induction protrusion, the induction protrusion is "wetted" with the melted solder. Therefore, the melted solder flows with the aid of its surface tension along surfaces of the induction protrusion to arrive at the arm of the lock pin. If the amount of the melted solder is sufficient, the melted solder further flows along the arm of the lock pin to the rear surface of the mounting plate with ease, whereby the mounting plate and the lock pin are fixed with great certainty.
  • Figs. 4-6 illustrate one embodiment of the electrical connector according to the invention.
  • the lock pin according to the invention will be understood concurrently with understanding of the electrical connector according to the invention by referring to these drawings.
  • the connector includes a connector main body 1 having both ends 1a and a front shell 2 having both ends 2a, a one-leg lock pin 3 and a two-leg lock pin 4.
  • the one-leg lock pin 3 includes a hook portion 3a, a threaded aperture 3b, an arm 3c and an anchoring projection 3d.
  • the two-leg lock pin 4 includes a hook portion 4a, a threaded aperture 4b, arms 4c and anchoring projections 4d.
  • the lock pins 4 and 5 are provided with induction protrusions 7 and 8a and 8b, respectively, according to the invention.
  • the induction protrusion 7 is provided on the arm 3c of the one-leg lock pin 3 and extends in the same direction as that of the anchoring projection 3d, while the induction protrusions 8a and 8b are provided on the arms 4c and 4c′ of the two-leg lock pin 4, respectively, and extending in the same directions as those of the anchoring projections 4d.
  • induction protrusions are so constructed that undersides of the protrusions 7, 8a and 8b are brought into contact with the surface of the printed circuit board 5 and extend in a horizontal direction beyond the outer circumferences of connector mounting apertures 5a and 5b of the printed circuit board 5 as shown, for example, in Fig. 5.
  • solder paste 6 (shown on an exaggerated scale in Fig. 6) provided, for example, between melted solder induction protrusions 8a and 8b of the two-leg lock pin 4 and ground wiring pattern surface 5c of the printed circuit board 5 is melted.
  • the melted solder induction protrusions 8a and 8b are substantially in contact with the ground wiring pattern surface 5c of the printed circuit board 5 as described above.
  • the induction protrusions 8a and 8b prevent the solder from agglomerating and introduce the melted solder 6 in a flowing condition into clearances between wall surface of the connector mounting aperture 5b and the arms 4c and 4c′ of the two-leg lock pin 4 so that the melt solder flows along the arms 4c and 4c′ and arrives on the underside of the printed circuit board 5. Accordingly, by cooling the connector under this condition, the arms 4c and 4c′ of the lock pin 4 and hence the front shell 2 are electrically connected to the ground wiring pattern surface 5c in a reliable manner.
  • the soldering operation with the one-leg lock pin 3 is effected in the same manner as that described above.
  • one of the lock pins includes one leg and the other lock pin includes twin legs in the above embodiment, it is apparent that all the lock pins may be provided with single legs or twin legs to bring about the same effect. Moreover, instead of both the lock pins being soldered, either of the lock pins may be soldered in the connector according to the invention. In the case of the one-leg lock pin, the induction protrusion may be provided so as to extend in the direction opposite to the extending direction of the anchoring projection 3d.
  • the melted solder induction protrusions are provided on the arms of the lock pins according to the invention.

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)
EP91306956A 1990-07-31 1991-07-30 Lock pin and electrical connector using the same Withdrawn EP0469845A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP80704/90 1990-07-31
JP1990080704U JPH0438672U (enrdf_load_stackoverflow) 1990-07-31 1990-07-31

Publications (1)

Publication Number Publication Date
EP0469845A1 true EP0469845A1 (en) 1992-02-05

Family

ID=13725726

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91306956A Withdrawn EP0469845A1 (en) 1990-07-31 1991-07-30 Lock pin and electrical connector using the same

Country Status (2)

Country Link
EP (1) EP0469845A1 (enrdf_load_stackoverflow)
JP (1) JPH0438672U (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2274356A (en) * 1993-04-30 1994-07-20 Itt Ind Ltd Improvements relating to electrical component mounting arrangements
GB2276776A (en) * 1993-04-01 1994-10-05 Whitaker Corp Electrical connector with panel retention means
GB2280796A (en) * 1993-08-05 1995-02-08 Whitaker Corp Electrical connector mounting arrangement
US5797769A (en) * 1996-05-14 1998-08-25 Molex Incorporated Electrical connector with boardlock
US5947769A (en) * 1997-06-03 1999-09-07 Molex Incorporated Shielded electrical connector
WO2024115476A1 (de) * 2022-11-29 2024-06-06 Robert Bosch Gmbh Steckverbinder und kontaktanordnung

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4586745B2 (ja) * 2006-02-27 2010-11-24 住友電装株式会社 基板への端子取付構造
JP4777842B2 (ja) * 2006-07-18 2011-09-21 株式会社東海理化電機製作所 コネクタ
JP4626680B2 (ja) * 2008-06-25 2011-02-09 株式会社デンソー 保持部材、電子部品、及び電子装置
JP5327037B2 (ja) * 2009-12-22 2013-10-30 株式会社デンソー 電子装置
JP7390637B2 (ja) * 2019-07-30 2023-12-04 パナソニックＩｐマネジメント株式会社 回路基板及び電源装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1053032A (enrdf_load_stackoverflow) *
US3500538A (en) * 1966-08-29 1970-03-17 Gen Electric Method for producing a wire having improved soldering characteristics
GB2029127A (en) * 1978-08-24 1980-03-12 Augat Inc Mounting electrical contacts
US4353609A (en) * 1980-10-02 1982-10-12 Henes Products Corp. Terminal for printed circuit boards

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5991733A (ja) * 1982-11-16 1984-05-26 Fujitsu Ten Ltd 歪軽減回路
JPS6433864A (en) * 1987-07-29 1989-02-03 Matsushita Electric Ind Co Ltd Pin jack

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1053032A (enrdf_load_stackoverflow) *
US3500538A (en) * 1966-08-29 1970-03-17 Gen Electric Method for producing a wire having improved soldering characteristics
GB2029127A (en) * 1978-08-24 1980-03-12 Augat Inc Mounting electrical contacts
US4353609A (en) * 1980-10-02 1982-10-12 Henes Products Corp. Terminal for printed circuit boards

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2276776A (en) * 1993-04-01 1994-10-05 Whitaker Corp Electrical connector with panel retention means
GB2276776B (en) * 1993-04-01 1997-06-11 Whitaker Corp Electrical connector with board retention device
GB2274356A (en) * 1993-04-30 1994-07-20 Itt Ind Ltd Improvements relating to electrical component mounting arrangements
US5411409A (en) * 1993-04-30 1995-05-02 Itt Corporation Component mounting arrangement
GB2280796A (en) * 1993-08-05 1995-02-08 Whitaker Corp Electrical connector mounting arrangement
GB2280796B (en) * 1993-08-05 1997-05-28 Whitaker Corp Electrical connector with antirotation feature
US5797769A (en) * 1996-05-14 1998-08-25 Molex Incorporated Electrical connector with boardlock
US5947769A (en) * 1997-06-03 1999-09-07 Molex Incorporated Shielded electrical connector
WO2024115476A1 (de) * 2022-11-29 2024-06-06 Robert Bosch Gmbh Steckverbinder und kontaktanordnung

Also Published As

Publication number Publication date
JPH0438672U (enrdf_load_stackoverflow) 1992-03-31

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Effective date: 19920806