EP0937318B1 - Borne femelle dotee d'un manchon protecteur - Google Patents

Borne femelle dotee d'un manchon protecteur Download PDF

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Publication number
EP0937318B1
EP0937318B1 EP97912850A EP97912850A EP0937318B1 EP 0937318 B1 EP0937318 B1 EP 0937318B1 EP 97912850 A EP97912850 A EP 97912850A EP 97912850 A EP97912850 A EP 97912850A EP 0937318 B1 EP0937318 B1 EP 0937318B1
Authority
EP
European Patent Office
Prior art keywords
ferrule
overstress
female terminal
contact
projections
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
EP97912850A
Other languages
German (de)
English (en)
Other versions
EP0937318A1 (fr
Inventor
Shigeru Isohata
Akira Nagamine
Takashi Hibino
Yoshiyuki Okada
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.)
Whitaker LLC
Original Assignee
Whitaker 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 Whitaker LLC filed Critical Whitaker LLC
Publication of EP0937318A1 publication Critical patent/EP0937318A1/fr
Application granted granted Critical
Publication of EP0937318B1 publication Critical patent/EP0937318B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02Contact members
    • H01R13/10Sockets for co-operation with pins or blades
    • H01R13/11Resilient sockets
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02Contact members
    • H01R13/10Sockets for co-operation with pins or blades
    • H01R13/11Resilient sockets
    • H01R13/111Resilient sockets co-operating with pins having a circular transverse section
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02Contact members
    • H01R13/10Sockets for co-operation with pins or blades
    • H01R13/11Resilient sockets
    • H01R13/113Resilient sockets co-operating with pins or blades having a rectangular transverse section
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02Contact members
    • H01R13/15Pins, blades or sockets having separate spring member for producing or increasing contact pressure
    • H01R13/187Pins, blades or sockets having separate spring member for producing or increasing contact pressure with spring member in the socket

Definitions

  • the present invention relates to a female terminal, and more specifically relates to a female terminal which is covered by a cylindrical ferrule.
  • Flat tab terminals and corresponding receptacle terminals pin terminals with a round cross section (hereafter referred to as "round pin terminals") and corresponding socket terminals, and post terminals with a rectangular cross section and corresponding receptacle terminals, are universally known as examples of pairs of male and female terminals.
  • tab terminals and corresponding receptacle terminals are widely used in the automotive industry because of advantages such as dimensional precision and high productivity.
  • round pin terminals and socket terminals involve some slight difficulty in obtaining true roundness, such terminals are superior in terms of ease of insertion into the connector housing, and are therefore widely used.
  • the socket terminal shown in Figure 6 is universally known as an example of such a round pin terminal and engaging socket terminal as disclosed in Japanese Patent Publication No. 62-198064.
  • This terminal 100 includes a main body 104 which has two cantilever beam-form leaf springs 102 formed as integral parts of the main body 104, and a ferrule 106 which is fit over the tip end of the main body 104. The leaf springs 102 are thus protected from external forces by the ferrule 106.
  • Terminals such as those shown in Figures 7 through 9 are known as female terminals which have anti-overstress means.
  • the female terminal 110 shown in Figure 7 and disclosed in Japanese Utility Model Publication No. 63-26979 is a receptacle terminal which electrically connects with a mating tab terminal 124.
  • a supporting member 120 which protrudes toward a base member 118, is located between the bent section 114 and peak section 116 of a flexible contact plate 112. Overstress generated in the bent section 114 can be prevented by this supporting section 120.
  • the precision of position of the lower end of the supporting member 120 depends on the cumulative total of the stamped and formed dimensional error of the supporting member 120, the bending error of the bent section 114 and the bending error of the supporting member 120 with respect to the flexible contact plate 112; accordingly, this precision is low.
  • the female terminal 130 shown in Figures 8A, 8B as disclosed in Japanese Utility Model Publication No. 7-42004 is a receptacle terminal which engages a mating tab terminal (not shown).
  • a plurality of projecting members 134, 136 which prevent overstress in a flexible contact plate 132, are formed by being struck inwardly from side walls 138. Since the projecting members 136 support the flexible contact plate 132 in the vicinity of the contact point 140, there is almost no room for the generation of overstress in the flexible contact plate 132.
  • openings 142 are formed in the side walls 138 of the female terminal 130 as a result of the projecting members 134 and 136 being struck inwardly from the side walls 138, there is a danger that the flexible contact plate 132 will be damaged by foreign matter which enters via the openings 142.
  • the female terminal 150 shown in Figures 9A, 9B as disclosed in Japanese Utility Model Publication No. 1-112574 is a receptacle terminal which engages a mating tab terminal (not shown).
  • lugs 160 which are disposed in apertures 158 formed in the side walls 156 of the terminal main body 152, are located on both sides of the flexible contact pages 154.
  • this female terminal 150 there is a danger that the flexible contact plate 154 will be damaged by foreign matter entering via the apertures 158 formed in the side walls 154 of the terminal main body 152.
  • the electrical wire-connecting section (not shown) formed a part of the terminal main body 152 is a separate part from the flexible contact plate 154, the reliability of the connection is lowered by the interposition of an extra electrical connecting part between the mating tab terminal and the electrical wire-connecting section.
  • EP-A-0060770 discloses a female terminal comprising a main body having a base member, contact arms extending forwardly from the base member and towards each other, and a ferrule disposed on the base member wherein the ferrule covers the base member and the contact arms.
  • US-A-4657336 discloses a female terminal comprising a base member, contact arms extending forwardly from the base member and towards each other.
  • the female terminal is inserted into a plated through hole in a circuit board which protects the contact arms and it serves as a surface to be engaged by anti-overstress projections formed at the free ends of the contact arms.
  • the object of the present invention is to provide a ferrule-equipped female terminal which has an anti-overstress means with high positional precision, and in which the flexible contact arms are securely protected from external foreign matter and forces.
  • a female terminal comprises a main body having a base member, contact arms extending forwardly from the base member and towards each other, and a ferrule of circular cross section disposed on the base member wherein the ferrule covers the base member and the contact arms, and anti-overstressing projections are located on both sides of a contact point of the contact arms and being disposed in the same plane as the contact point so that the anti-overstress projections can engage an inside surface of the ferrule.
  • the female terminal of the present invention comprises a main body which has a contact member including a plurality of cantilever beam-form contact arms which extend from a base member, an electrical wire-connecting section, and a ferrule which surrounds the contact member, anti-overstress projections located on both sides of contact points of the contact arms so that the anti-overstress projections are disposed in the same plane as the contact points, and the anti-overstress projections are arranged so that the projections can engage an inside surface of the ferrule.
  • the angle formed by a line connecting one of the edges of an anti-overstress projection on an inside surface of the ferrule with the center of the ferrule, and a line connecting the other of the edges with the center of the ferrule, is set at less than 90 degrees.
  • female terminal 1 of the present invention comprises a main body 10 which is formed by stamping and forming of a copper alloy plate, and a cylindrical ferrule 60 which is preferably formed by stamping and forming of the same metal plate material as that used for the main body 10.
  • the main body 10 has a contact section 14 which is formed at one end of a first base member 12 having a circular cross section, and which engages a mating round pin terminal (not shown).
  • An electrical wire-connecting section 18 is formed at the other and of a second base member 16 extending in a direction perpendicular to the direction of extension of the base member 12.
  • the electrical wire-connecting section 18 has a wire-crimping part 20 which is used to make electrical and mechanical engagement with the core wires 5 of an electrical wire 3, and an insulation-crimping part 22 which is used to engage the insulating covering of the electrical wire 3.
  • wire-crimping part 20 which is used to make electrical and mechanical engagement with the core wires 5 of an electrical wire 3
  • insulation-crimping part 22 which is used to engage the insulating covering of the electrical wire 3.
  • a pair of wire-pulling protective lugs 24 which face each other are formed on the second base member 16 in the vicinity of the base member 12; lugs 24 resist pulling of the electrical wire 3 by engaging with projections on a housing (not shown) in which the terminal is disposed.
  • Ferrule 60 is disposed on the contact section 14 of the main body 10 so that the ferrule 60 surrounds the contact section 14. Furthermore, dovetail projections 62 and 64, and dovetail grooves 66 and 68, are formed in the respective edges of the ferrule 60, when the ferrule is in an unrolled state, and opening of the ferrule 60 is prevented by the engagement of the dovetail projections 62 in the dovetail grooves 66 and the engagement of the dovetail projection 64 in the dovetail groove 68. In the present embodiment, three projections 70 with arcuate surfaces, (see Figure 4) which are used for engagement with the housing, are formed on the side surfaces of the ferrule 60. Furthermore, stopper members 72, which project inward between two parallel slits 74, 74, are formed in the side surface of the ferrule 60.
  • the contact section 14 of the main body 10 has a plurality of contact arms 30 (three contact arms 30 in the present preferred embodiment) which extend toward the front end in an axial direction (i. e., toward the right in Figure 2) and towards each other from the front end 27 of the cylindrical base part 26 forming a continuation of the base member 12.
  • the front end 27 of the cylindrical base member 26 of the main body 10 engages stopper members 72 on the ferrule 60, and the rear end 28 of the cylindrical base member 26 engages second stopper members 76 on the rear end of the ferrule 60, so that the main body 10 is fastened inside the ferrule 60.
  • the contact arms 30 converge toward the front ends thereof, and then spread outward beyond the contact points 32 which make electrical contact with a mating round pin (not shown) that is inserted via an opening 78 formed in the front end of the ferrule 60.
  • each of the contact arms 30 has a relatively broad portion 34, which is connected with the cylindrical base member 26 (see Figure 2), a portion 36, which has a narrower width than the broad portion 34, a transitional portion 38 with a varying width, which is positioned between the portions 34 and 36, a contact point portion 32, which is positioned further toward the front end than the narrow portion 36, and a front end portion 40, which is positioned at the front end of the contact arm 30.
  • Anti-overstress projections 42 which will be described later, are formed on both sides of the contact point portion 32.
  • the anti-overstress projections 42 are formed in positions that are extremely close to the contact point portions 32 of the contact arms 30. Accordingly, since the anti-overstress projections 42 can be formed with a high rigidity, the generation of overstress in the contact arms 30 can be reliably prevented. Furthermore, the anti-overstress projections 42 are positioned within the same plane (or more accurately, within the same curved plane) as the contact points 32, and are not bent toward the inside surface of the ferrule 60. Accordingly, the positional precision of the edges 44 of the anti-overstress projections 42, which engage the ferrule 60, can be especially improved.
  • the anti-overstress projections 42 are formed with beveled surfaces 46 in order to prevent mutual interference between the anti-overstress projections 42 of the respective contact arms 30. Moreover, when the edges 44 engage the inside surface of the ferrule 60, the front end portions 40 of the contact arms 30 do not engage the inside surface of the ferrule 60.
  • A indicates the contact location on the side of the ferrule 60 which can be engaged by the edge 44 of one of the anti-overstress projections 42 of one contact arm
  • B indicates the contact location on the side of the ferrule 60 which can be engaged by the other edge 44 of the same contact arm
  • O indicates the center of the ferrule 60
  • indicates the angle formed by the line OA and the line OB.
  • the dimensions of the anti-overstress projections 42 are set so that ⁇ ⁇ 90°. Accordingly, the error y in the direction of displacement of the contact arm 30 (i. e., the vertical direction in Figure 5) is always less than the dimensional error x that is generated during the forming of the anti-overstress projections 42.
  • the error in the direction of displacement of the contact arms 30 can be further reduced by setting ⁇ at a value less than 90°. Accordingly, there is very little danger of excessive displacement and resulting overstress of the contact arms 30. Furthermore, in cases where ⁇ ' ⁇ 90° (as indicated by the broken lines shown in Figure 5), the error y' in the direction of displacement of the contact arms is equal to or greater than the dimensional error x generated during the forming of the anti-overstress projections.
  • the anti-overstress projections 42 of the female terminal 1 can engage the inside surface of the ferrule 60, there is no need to form cut-out and raised portions or holes in the ferrule 60 in order to prevent overstress of the contact arms 30. Accordingly, damage of the contact arms 30 caused by foreign matter entering from the sides of the female terminal 1 can be reliably prevented.
  • the female terminal 1 described above is a so-called flag-type terminal in which the contact section 14 and the electrical wire-connecting section 18 are arranged in an L-shape; however, it would also be possible to arrange these parts on the same straight line.
  • anti-overstress projections are disposed on both sides of the contact points of the contact arms in the same plane as the contact points, and these anti-overstress projections are arranged so that the projections can engage an inside surface of a ferrule. Accordingly, the positional precision of the edges of the anti-overstress projections which can engage the inside surface of the ferrule is improved, so that overstress in the contact arms can be reliably prevented. Furthermore, there is no need to form cut-outs and raised portions or holes in the ferrule in order to prevent overstress of the contact arms. Accordingly, the contact arms can be reliably protected from external foreign matter and forces.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)

Claims (8)

  1. Borne femelle comprenant un corps principal (10) comportant un élément de base (12), des bras de contact (30) s'étendant vers l'avant à partir de l'élément de base, les uns en direction des autres, et une ferrule de section transversale circulaire agencée sur l'élément de base et recouvrant l'élément de base et les bras de contact, caractérisée en ce que
       des saillies anti-surcharge (32) sont agencées sur les deux côtés d'un point de contact (32) des bras de contact et situées dans le même plan que le point de contact, de sorte que les saillies anti-surcharge peuvent s'engager dans une surface interne de la ferrule.
  2. Borne femelle selon la revendication 1, dans laquelle les bras de contact (30) convergent vers les extrémités avant correspondantes avant de se déployer vers l'extérieur au-delà des points de contact (32).
  3. Borne femelle selon les revendications 1 et 2, dans laquelle les saillies anti-surcharge (42) comportent des bords (44) s'engageant dans une surface interne de ladite ferrule (60).
  4. Borne femelle selon la revendication 3, dans laquelle les bords (44) s'engagent dans la surface interne de ladite ferrule (60), les parties d'extrémité avant (40) desdits bras de contact (30) ne s'engageant pas dans la surface interne de ladite ferrule.
  5. Borne femelle selon les revendications 1 à 4, dans laquelle un angle () formé par une ligne (OA) connectant une des zones de contact sur une surface interne de ladite ferrule (60), dans laquelle peuvent s'engager les saillies anti-surcharge (42) des bras de contact (30), avec un centre (O) de ladite ferrule (60) et une ligne (OB) connectant une autre des zones de contact avec ledit centre (O) est inférieur à 90 degrés.
  6. Borne femelle selon les revendications 1 à 5, dans laquelle ladite ferrule (60) comporte des éléments d'arrêt (72, 76) entre lesquels ledit élément de base (12) est agencé pour fixer ledit élément de base (12) et les bras de contact (30) dans ladite ferrule (60).
  7. Borne femelle selon les revendications 1 à 5, dans laquelle lesdites saillies anti-surcharge (42) comportent des surfaces biseautées (46) pour empêcher une interférence mutuelle entre les saillies anti-surcharge (42) des bras de contact respectifs (30).
  8. Borne femelle selon les revendications 1 à 7, dans laquelle les bras de contact (30) sont des éléments plans.
EP97912850A 1996-10-21 1997-10-21 Borne femelle dotee d'un manchon protecteur Expired - Lifetime EP0937318B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP29773896 1996-10-21
JP29773896A JP3148135B2 (ja) 1996-10-21 1996-10-21 雌型端子
PCT/US1997/019074 WO1998018182A1 (fr) 1996-10-21 1997-10-21 Borne femelle dotee d'un manchon protecteur

Publications (2)

Publication Number Publication Date
EP0937318A1 EP0937318A1 (fr) 1999-08-25
EP0937318B1 true EP0937318B1 (fr) 2002-04-03

Family

ID=17850546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97912850A Expired - Lifetime EP0937318B1 (fr) 1996-10-21 1997-10-21 Borne femelle dotee d'un manchon protecteur

Country Status (5)

Country Link
EP (1) EP0937318B1 (fr)
JP (1) JP3148135B2 (fr)
AU (1) AU4993697A (fr)
DE (1) DE69711671T2 (fr)
WO (1) WO1998018182A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6247975B1 (en) * 1998-12-14 2001-06-19 Framatome Connectors Interlock, Inc. Multi-piece electrical receptacle terminal
KR101234337B1 (ko) * 2011-10-05 2013-02-18 한국단자공업 주식회사 터미널
CN104781993A (zh) 2012-10-19 2015-07-15 李尔公司 电气端子
US9293852B2 (en) 2013-06-21 2016-03-22 Lear Corporation Electrical terminal assembly
US9444205B2 (en) 2014-03-25 2016-09-13 Lear Corporation Electric connector with contact protection
US10128602B2 (en) 2014-05-13 2018-11-13 Lear Corporation Electric connector with a terminal interface
US9847591B2 (en) 2014-07-22 2017-12-19 Lear Corporation Electric terminal assembly
WO2016056660A1 (fr) * 2014-10-10 2016-04-14 株式会社フジクラ Borne et son procédé de production
KR102060828B1 (ko) * 2019-03-12 2019-12-30 주식회사 진솔원 수중생물 수조 양식 시스템

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4621887A (en) * 1981-03-09 1986-11-11 Allied Corporation Electrical contact
US4657336A (en) * 1985-12-18 1987-04-14 Gte Products Corporation Socket receptacle including overstress protection means for mounting electrical devices on printed circuit boards
US4790773A (en) * 1986-09-17 1988-12-13 E. I. Du Pont De Nemours And Company Electrical receptacle
US5498179A (en) * 1994-05-04 1996-03-12 Woodhead Industries, Inc. Electrical connector

Also Published As

Publication number Publication date
DE69711671D1 (de) 2002-05-08
DE69711671T2 (de) 2002-10-17
EP0937318A1 (fr) 1999-08-25
WO1998018182A1 (fr) 1998-04-30
JP3148135B2 (ja) 2001-03-19
AU4993697A (en) 1998-05-15
JPH10125378A (ja) 1998-05-15

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