EP0408451A1 - Electrical connector - Google Patents

Electrical connector Download PDF

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Publication number
EP0408451A1
EP0408451A1 EP90401999A EP90401999A EP0408451A1 EP 0408451 A1 EP0408451 A1 EP 0408451A1 EP 90401999 A EP90401999 A EP 90401999A EP 90401999 A EP90401999 A EP 90401999A EP 0408451 A1 EP0408451 A1 EP 0408451A1
Authority
EP
European Patent Office
Prior art keywords
contact
widened portion
electrical connector
distal ends
contacts
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Withdrawn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
EP90401999A
Other languages
German (de)
English (en)
French (fr)
Inventor
Kazuhiro C/O Daiichi Denshi Kogyo K. K. Sato
Yasuharu C/O Daiichi Denshi Kogyo K. K. Sawabata
Yoshiaki C/O Daiichi Denshi Kogyo K. K. Igarashi
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 EP0408451A1 publication Critical patent/EP0408451A1/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Withdrawn legal-status Critical Current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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
    • H01R13/41—Securing in non-demountable manner, e.g. moulding, riveting by frictional grip in grommet, panel or base
    • 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

Definitions

  • This invention relates to an electrical connector, and more particularly to an electrical connector capable of fixing contacts by press-fitting at predetermined exact positions of an insulating main body by press-fitting.
  • FIG. 1a An actual example is illustrated in Figs. 1a and 1b.
  • the electrical connector shown in Fig. 1a includes an insulating main body 1 and contacts 2A and 2B press-fitted in a locator portion 3 of the main body 1 and fixed thereat.
  • Such a receptacle connector is arranged at a predetermined position, for example, on a circuit board 4 and fixed thereat by means of set screws 5 or the like.
  • Fig. 1b illustrates a condition that the receptacle connector is arranged and fixed onto a circuit board and a relationship between the arranged receptacle connector and a plug connector to be fitted with the receptacle connector.
  • the receptacle connector mounted on the circuit board 4 is adapted to be fitted with a plug connector separately prepared.
  • a fixing portion 11 of a contact tail is press-fitted in a slit 32 of a locator plate 3 so that the contact tail is positioned relative to the locator plate 3.
  • the fixing portion of the contact is widened to provide a widened portion 111.
  • the widened portion 111 cuts or scrapes the inner walls 321 of the slit 32 when the widened portion 111 is press-fitted in the slit 32.
  • chips of the inner walls 321 accumulate, for example, between a wall surface 322 of the slit 32 at its bottom and the widened portion 111 of the fixing portion 11 of the contact tail, with the result that the contact tail 11 cannot be positioned at a predetermined position, which is a technical problem to be solved for long time.
  • each of the contacts comprises a widened portion whose both ends are inclined rearward of inserting direction for press-fitting of the contact, and each contact has been distal ends and bottoms of the widened portion an elasticity against a force narrowing a distance between the distal ends.
  • the distal ends of the widened portion are inclined rearward of inserting direction for press-fitting and the distance between the distal ends tends to narrow elastically. Therefore, during the insertion of the widened portion into the slit, the distal ends of the widened portion deform toward each other so that the force urging inner walls of the slit becomes weak with the result that the widened portion can be inserted into the slit without scraping the inner walls of the slit.
  • the distal ends of the widened portion are likely to deform away from each other so that urging force of the distal ends against the inner walls of the slit increases to prevent any dislodgment of the contact from the slit.
  • the electrical connector according to the invention comprises the above construction with the above effects, the inner walls of the slits are not scraped in inserting the contact into the slit so that any scraped chips are not produced. Therefore, there is no difficulty in positioning of a contact tail due to scraped chips.
  • the fixing force of the contact tail in a removing direction is large so that the contact tail does not shift in any way. Accordingly, the significant effect of exact positioning of contacts particular to the invention can be accomplished.
  • Fig. 4 is a perspective view illustrating a fixing portion of a contact 2A or 2B used in a connector according to the invention.
  • the contact tail 11 is provided at the fixing portion with a widened portion 111 whose outer ends are bent in the proximity of its bottom 114 rearward of a press-fitting direction at a determined angle.
  • Each of the outer ends of the widened portion 111 is slightly tapered toward its distal end 113.
  • the distal end 113 may be wider than the bottom 114.
  • the distal end 113 may of course have a width substantially equal to that of the bottom 114.
  • Fig. 5 illustrates on an enlarged scale the fixing portion of the contact tail according to the invention in section taken along the line V-V in Fig. 4.
  • the distal end 113 of the widened portion 111 is inclined and the portion from the bottom 114 to the distal end 113 constitutes a cantilever having an elasticity against a force tending to narrow a distance a between both the distal ends.
  • An angle ⁇ made by the portion from the bottom 14 to the distal end 113 with the contact tail is preferably 30° to 60°.
  • the distal end 113 having the angle ⁇ less than 30° disadvantageously tends to scrape inner walls of a slit 32.
  • the force deforming the distal ends 113 of the widened portion 111 away from each other is too weak so that the widened portion 111 is likely to be dislodged from the slit unfavorably.
  • an edge of the distal end 113 formed by punching using a press die may be used as a portion of the distal end 113 abutting against the inner wall 321 of the slit.
  • the distal ends 113 in Fig. 5 illustrate the edges abutting against the inner walls 321 of the slit. As the distal end 113 is inclined at ⁇ , the sharp edges of the distal ends 113 abut against the inner walls of the slit.
  • this feature is only one example. Other arrangements may be used so long as the widened portion of the contact and inner walls of the slit are not likely to slide with each other. Therefore, the edges of the distal ends 113 shown in Fig. 5 may be chamfered or hit in pressing to be dull or rounded, if required. This is advantageous in the case that the locator plate 3 is made of a material to be easily scraped or press-fitting force is too large.
  • the contacts used in the connector according to the invention have generally widths of 0.6 to 1.2 mm, and lengths of 15 to 45 mm and thicknesses of 0.2 to 0.35 mm in case of the widths and lengths within the above values.
  • a length b (Fig. 5) from the bottom 114 to the distal end 113 obliquely extending is 0.2 to 1.5 mm.
  • the length b less than 0.2 mm is not preferable because of less elasticity.
  • the length b more than 1.5 mm is also disadvantageous because of low elasticity resulting in low fixing force of the contact.
  • the portions from the bottoms 114 to the distal end 113 extend straight. However, they may be curved on any side.
  • the substantially straight portions are advantageous in manufacturing because the straight portions are only 0.2 to 1.5 mm in the usual sizes.
  • Widths c (Fig. 4) of the distal ends 113 are preferably as wide as possible because the wider the widths, the higher is the fixing force in stability and reliability.
  • the widths c of the distal ends 113 more than a thickness of the locator plate are disadvantageous, because the widened portion 111 of the contact will abut against the circuit board when the connector is equipped on a circuit board and may shift the fitting position.
  • the contacts used in this invention can be made any metallic materials so long as they have been used for this kind of contacts.
  • the contacts can be typically made of various copper alloys such as phosphor bronze, solder-plated phosphor bronze, beryllium-copper brass, German silver, Tando, Cadmium copper and Cu-Ni-Sn alloys.
  • the insulating main body used in the connector according to the invention can be made any materials so long as they have been used for the same purpose.
  • engineering plastic materials particularly liquid crystal plastics among them are preferable when it is desirable to improve the reliability.
  • Usable plastic materials are, nylon 66, nylon 6, polyacetal, polycarbonate, PBT, PPE, PPS, PPD, PET and the like.
  • a width of a slit 32 provided in a locator into which the contact in press-fitting is 5 to 15% narrower than the distance a between the distal ends of the widened portion of the contact. If it is less than 5%, the press-fitting force is too small so that the fixing force for the contact becomes small. If it is more than 15%, the deformation of the widened portion of the contact becomes large to increase its elastic force so that wall surfaces of the slit may be scraped.
  • Fig. 6 illustrates another embodiment of the invention which is preferably used in the case that the contact is made of a relatively thin material (for example, 0.1 to 0.2 mm thickness).
  • Fig. 7 is an enlarged sectional view of the contact taken along the line VII-VII in Fig. 6.
  • the contact 11 is folded along its longitudinal center line into a form of a trough over its length, thereby increasing a strength against buckling.
  • the effect of the invention can be accomplished by folding the contact at 30° to 60° of ⁇ as shown in Fig. 7.
  • the angle of 30° to 45° is most preferable.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
EP90401999A 1989-07-14 1990-07-11 Electrical connector Withdrawn EP0408451A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1989082250U JP2542078Y2 (ja) 1989-07-14 1989-07-14 電気コネクタ
JP82250/89 1989-07-14

Publications (1)

Publication Number Publication Date
EP0408451A1 true EP0408451A1 (en) 1991-01-16

Family

ID=13769190

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90401999A Withdrawn EP0408451A1 (en) 1989-07-14 1990-07-11 Electrical connector

Country Status (3)

Country Link
EP (1) EP0408451A1 (no)
JP (1) JP2542078Y2 (no)
CA (1) CA2020811A1 (no)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0708495A3 (en) * 1994-10-19 1997-10-29 Thomas & Betts Corp Electrical connector and manufacturing method
WO1998028821A1 (en) * 1996-12-20 1998-07-02 The Whitaker Corporation Memory card connector and contact retention system therefor and method of assembly thereof
US6472958B2 (en) 2000-01-19 2002-10-29 Sony Corporation Input circuit of satellite tuner
WO2007021299A1 (en) * 2005-08-15 2007-02-22 Molex Incorporated Vertical edge card connector assembly with high-speed terminals
US7442089B2 (en) 2005-07-07 2008-10-28 Molex Incorporated Edge card connector assembly with high-speed terminals

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1765654A1 (de) * 1967-07-24 1971-08-12 Molex Inc Anschlussvorrichtung fuer gedruckte Schaltungen
DE8431966U1 (de) * 1984-10-31 1986-04-10 Siemens AG, 1000 Berlin und 8000 München Kontaktfeder für elektrische Steckverbinderleisten
EP0245161A1 (en) * 1986-04-30 1987-11-11 Daiichi Denshi Kogyo Kabushiki Kaisha Fixing structure for contact pins of electrical connector
US4795378A (en) * 1986-09-26 1989-01-03 Omron Tateisi Electronics Co. Terminal pin
US4842528A (en) * 1987-03-27 1989-06-27 Amp Incorporated Solder post retention means

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1184987A (en) * 1981-05-13 1985-04-02 Hartmuth F. Thaler Solderless connector pin for electrical circuits
JPH0350621Y2 (no) * 1984-12-26 1991-10-29

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1765654A1 (de) * 1967-07-24 1971-08-12 Molex Inc Anschlussvorrichtung fuer gedruckte Schaltungen
DE8431966U1 (de) * 1984-10-31 1986-04-10 Siemens AG, 1000 Berlin und 8000 München Kontaktfeder für elektrische Steckverbinderleisten
EP0245161A1 (en) * 1986-04-30 1987-11-11 Daiichi Denshi Kogyo Kabushiki Kaisha Fixing structure for contact pins of electrical connector
US4795378A (en) * 1986-09-26 1989-01-03 Omron Tateisi Electronics Co. Terminal pin
US4842528A (en) * 1987-03-27 1989-06-27 Amp Incorporated Solder post retention means

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0708495A3 (en) * 1994-10-19 1997-10-29 Thomas & Betts Corp Electrical connector and manufacturing method
WO1998028821A1 (en) * 1996-12-20 1998-07-02 The Whitaker Corporation Memory card connector and contact retention system therefor and method of assembly thereof
GB2335095A (en) * 1996-12-20 1999-09-08 Whitaker Corp Memory card connector and contact retention system therefor and method of assembly thereof
GB2335095B (en) * 1996-12-20 2001-08-01 Whitaker Corp Electrical connector and method of assembling same
US6472958B2 (en) 2000-01-19 2002-10-29 Sony Corporation Input circuit of satellite tuner
US7442089B2 (en) 2005-07-07 2008-10-28 Molex Incorporated Edge card connector assembly with high-speed terminals
WO2007021299A1 (en) * 2005-08-15 2007-02-22 Molex Incorporated Vertical edge card connector assembly with high-speed terminals

Also Published As

Publication number Publication date
JPH0322364U (no) 1991-03-07
CA2020811A1 (en) 1991-01-15
JP2542078Y2 (ja) 1997-07-23

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19910717