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WO1992019022A1 - Connecteurs electriques et elements de borne pour utilisation dans lesdits connecteurs - Google Patents

Connecteurs electriques et elements de borne pour utilisation dans lesdits connecteurs Download PDF

Info

Publication number
WO1992019022A1
WO1992019022A1 PCT/GB1992/000625 GB9200625W WO9219022A1 WO 1992019022 A1 WO1992019022 A1 WO 1992019022A1 GB 9200625 W GB9200625 W GB 9200625W WO 9219022 A1 WO9219022 A1 WO 9219022A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal element
spine
locking means
projection
longitudinal axis
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.)
Ceased
Application number
PCT/GB1992/000625
Other languages
English (en)
Inventor
Alan John Dennis
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.)
Pressac Ltd
Original Assignee
Pressac 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 Pressac Ltd filed Critical Pressac Ltd
Publication of WO1992019022A1 publication Critical patent/WO1992019022A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2416—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type
    • H01R4/242—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members being plates having a single slot
    • H01R4/2425—Flat plates, e.g. multi-layered flat plates
    • H01R4/2429—Flat plates, e.g. multi-layered flat plates mounted in an insulating 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
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/515—Terminal blocks providing connections to wires or cables

Definitions

  • the invention relates to electrical connectors and especially to so-called insulation displacement connectors of the sort for use with printed circuit boards (PCB) .
  • Such connectors commonly comprise conducting terminal elements which are mounted in an insulating housing and provide a means of directly connecting insulating wires to a printed circuit board.
  • Patent Specification GB 1596347 discloses a typical insulation displacement connector of this kind.
  • the mounting of the terminal elements in the insulating clamping elements was achieved by the use of interlocking barbs and gave rise to a completely rigid structure. This complete rigidity sometimes gave rise to problems in mounting the connector in the predrilled holes of a printed circuit board.
  • the insulated wires are only connected to the connector by two sharp wire stripping jaws. Accordingly, if the wire is accidentally jerked, it is possible for the jaws to sever the wire completely.
  • the present invention may be considered to provide a conductive terminal element comprising an elongate spine having a first longitudinal slot ext nding along a longitudinal axis from a mouth at one end of the spine partially along the length thereof, said first longitudinal slot being adapted to receive an insulated wire, cut the insulation and provide electrical connection between the conducting core of the wire and the terminal element, a pair of jaw portions projecting from outer edge portions of the spine and inclined at an angle inwardly to provide a second longitudinal slot parallel with but spaced from the spine, said pair of jaw portions being adapted to contact but not cut the insulation of a wire and take the strain of any forces applied to the wire externally; a neck portion of reduced cross-section extending from an end of the spine; and locking means connected to the spine via the neck portion, said locking means comprising at least one projection projecting transverse to the said longitudinal axis, the neck portion being capable of permanent deformation such that the locking means can be rotated about an axis coaxial with or parallel to said longitudinal axis in order to effect a
  • Said terminal element is preferably a metal pressing.
  • Said terminal may suitably comprise resilient jaw portions.
  • said locking means comprises two opposed projections occupying a plane transverse to said longitudinal axis and forming an angle of 90° with one another, and one of said projections being co-planar with the spine.
  • said second slot is wider than said first slot.
  • Said terminal may comprise a longitudinally extending contact pin adapted to provide, for the terminal element, mechanical interlock with and electrical connection to a
  • the present invention may be considered to provide an electrical connector comprising a terminal element and an insulating housing adapted to mount said terminal element.
  • Said electrical connector may comprise three adjacent insulating housings which are integrally formed in a single moulding.
  • said electrical connector provides means for limiting the rotation of the locking means.
  • the relative dimensions of the terminal element and the insulating housing are such that in both the locked and unlocked status, there is a small amount of float, i.e. relative movement, therebetween.
  • Figure 2 shows a side view of the terminal element
  • Figure 3 shows a front view of the terminal element
  • Figure 4 shows a plan view of the terminal element
  • Figure 5 shows a schematic view of the terminal element holding an insulated wire
  • Figure 6 shows a view of the first face of a moulding
  • Figure 7 shows a view from the top of the moulding
  • Figure 8 shows a view from below the moulding.
  • FIGS 1 to 4 show a terminal element, generally denoted 10, according to the present invention.
  • the terminal element comprises an elongate planar spine 12 which has longitudinal slot 18, centrally formed therein.
  • the slot 18 extends from a widened, generally V-shaped mouth 20, at a first end of the spine 12, to a narrower portion 22 which extends partially the length thereof.
  • the edges 24, which define the slot 18, are sharp and are adapted to displace the insulation 28 of the wire 26 placed therein, thus forming an electrical contact between the terminal element 10 and the wire core 30, as most clearly shown in Figure 5.
  • a strain relief clamp 32a ⁇ E integrally formed with the spine 12, in the form of a pair of jaws 32, provides a second longitudinal slot 34, which is parallel to, but spaced from, the first slot 18.
  • the second slot 34 extends the entire length of the clamp 32.
  • the edges 36 of the jaws 32, which define the second slot 34, are blunt and are adapted to contact and grip tightly insulation 28 of the wire 26 and not cut therethrough to the core 30.
  • a twistable neck portion 40 of width narrower than that of the spine 12 is centrally positioned in relation to and extends longitudinally with respect to the spine 12.
  • Locking means 39 is attached to the end of the spine 12.
  • Said locking means 39 comprises a first projection viz.
  • a first intermediate planar member 14 which is disposed at the end of the twistable neck portion 40, is coplanar with and extends in a direction transverse to a major axis of the spine 12 and forms, together with the twistable neck portion 40 an L-shape.
  • the locking means 39 further comprises a second projection viz a second intermediate planar member 15 which is disposed at the junction of the twistable neck portion 40 and the first intermediate member 14; and extends in a direction substantially perpendicular to the plane of the spine 12. At the end of the second intermediate member 15 an elongate contact pin 16 is disposed.
  • the major axis of the contact pin 16 extends longitudinally with respect to the spine 12 and its minor axis subtends an angle of about 45° with respect to the plane of the spine 12.
  • the locking means 39 is adapted to be twisted about a longitudinally extending axis which passes through the centre of the spine 12 and the centre of the twistable neck portion 40 and is denoted A-A on the drawings.
  • a plurality of identical housings 60 are formed in a single moulding; the moulding being generally denoted 59.
  • Each housing 60 is of the general form of a tube.
  • a cross-section of the external surfaces of the moulding is generally rectangular.
  • FIG. 6 shows a side view of a preferred moulding comprising three housing.
  • the structure of the housing 60 will now be described with reference to a single housing.
  • Each housing 60 has a pair of parallel centrally positioned longitudinal slots 62 and 64 in two opposing surfaces of the moulding.
  • Both slots 62 and 64 are of equal length and extend partially down the length of the housing 60.
  • the slot 62, disposed on a first side of the housing 60 is most clearly shown in Figure 6 and has a widened top mouth portion.
  • the other slot 64 on a second side of the housing 60 and shown in Figure 7 is of uniform thickness along its entire length.
  • a base structure 68 is provided at the lower extremity of the housing 60.
  • the base 68 has a shaped orifice 66 formed therein, the geometry of which is the same as the cross-section of the locking means 39, this is most clearly shown in Figure 8.
  • a planar dividing member 69 is formed on the base 68 and lies substantially in the plane B. Said dividing member 69 upstands longitudinally from the base as far as the lower extremities of the slots 62 and 64, and projects laterally from the second side wall to the periphery of the shaped orifice 66.
  • two integrally formed mounting pins 70 and 72 are provided at diametrically opposite end portions of the moulding 59.
  • the mounting pin 70 projects from a locally longitudinally extended second side wall portion 71 and is in line with the said second said wall.
  • the mounting pin 72 projects from a locally extended first said wall portion, which has been extended both laterally and longitudinally forming a protruding ridge 73 as shown in Figures 6 and 8. Since the mounting pin 72 projects from the protruding ridge 73, it is parallel to, but spaced slightly out of line with the first side wall.
  • Both mounting pins 70 and 72 have been mounted on extended wall portions which have been longitudinally extended by the same amount. Complementary locally extended wall portions have been added to the other pair of diametrically opposite corners, however, these do not have pins mounted thereon.
  • the terminal element 10 In order to mount the terminal element 10 into a housing 60, the terminal element 10 is brought into sliding engagement with the top of the housing 60, in such a way that the locking means 39 is in line with the shaped orifice 66. On sliding the terminal element 10 into the housing 60, the first and second slots 18 and 34 respectively of the terminal element 10 occupy plane B of the housing. Furthermore, the dividing member 69 is located between the jaws 32. Once the terminal element is fully inserted, the locking means 39, projects beyond the base 68. In order to secure the terminal element therein, the twistable neck portion 40 is permanently deformed by rotation of the locking means 39 about its central axis through an angle of 45° thus permanently dealigning itself with the shaped orifice 66, thereby locking the terminal element 10 in the housing.
  • the spine 12 and jaw portions 32 are a snug fit in the housing 60 and thus restrained against rotation. Rotation of the locking means 39 is stopped at a desired orientation to retain the terminal elements in place and to ensure that the contact pins 16 are aligned at a spacing to register with preformed holes in a PCB. If desired the connector may comprise means for limiting the rotation of the locking means 39, and the contact pin 16, at a predetermined position.
  • the dimensions of the terminal element 10 are such that when it has been locked in a housing 60, there is a small amount of "floating" movement, between the terminal element 10 and the housing 60. This enables the connector to be used even if the holes in the PCB, or the pins 16, are slightly out of line.
  • Figure 5 serves to illustrate the way the strain relief mechanism operates.
  • the line x-x indicates the direction that the wire 36 is likely to be tugged. It can be seen that the blunt jaws 32 tend to isolate the sharp jaws 24 from external applied forces experienced by the wire, thus decreasing the probability that a sharp tug of the wire 26 will cause movement of the conductor 30 at the interface of the conductor 30 and the jaws 24 thus maintaining the integrity of the electrical and mechanical connection between the jaws 24 and conductor 30.
  • One of the terminal elements 10 can only be inserted in one of the housings 60 in the correct orientation so that the jaws 32 are adjacent the slot 64 and the slot 18 is adjacent the slot 62.
  • the particular shape of the orifice 66 and locking means 39 are chosen to be such that there is no possibility of the terminal elements being inserted in an incorrect orientation. Thus the reliability and accuracy of assembly is assured. Furthermore, no additional operations are necessary to ensure proper strain relief gripping of the wires by the jaws 32.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)

Abstract

Un connecteur électrique comprend un moulage (59) qui définit des logements dans lesquels sont maintenus des éléments de borne (10). Chaque élément (10) comprend une partie dorsale (12) présentant une rainure longitudinale (18) qui reçoit un fil (26) et qui écarte l'isolant (28) afin de créer une connexion avec l'âme du conducteur (30). Des mâchoires (32) font saillie par rapport à la partie dorsale (12) penchée vers l'intérieur pour former une deuxième rainure (34) parallèle à la partie dorsale (12) mais écartée de celle-ci, lesdites mâchoires (32) étant en contact avec l'isolant (28) sans le couper et absorbant les efforts lorsque des forces externes sont appliquées au fil (26). L'élément comporte en outre un col (40) de section réduite s'étendant depuis une extrémité de la partie dorsale (12), et un moyen de blocage (39) relié à la partie dorsale (12) par le col (40) et comportant des protubérances (14, 15) qui font saillie transversalement par rapport à l'axe, le col (40) étant susceptible de subir une déformation permanente de sorte que le moyen de blocage (39) peut être tourné autour d'un axe A disposé coaxialement ou parallèlement à l'axe longitudinal afin de changer de manière permanente l'orientation angulaire des protubérances (14, 15) par rapport à la partie dorsale (12). Le moyen (39) peut être introduit à travers une ouverture de forme appropriée (66) dans le moulage (59), le corps de la borne étant maintenu dans le logement (60), et le moyen peut être tourné pour immobiliser la borne dans le logement.
PCT/GB1992/000625 1991-04-12 1992-04-08 Connecteurs electriques et elements de borne pour utilisation dans lesdits connecteurs Ceased WO1992019022A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9107802.2 1991-04-12
GB9107802A GB2254968B (en) 1991-04-12 1991-04-12 Electrical connectors and terminal elements for use therein

Publications (1)

Publication Number Publication Date
WO1992019022A1 true WO1992019022A1 (fr) 1992-10-29

Family

ID=10693153

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1992/000625 Ceased WO1992019022A1 (fr) 1991-04-12 1992-04-08 Connecteurs electriques et elements de borne pour utilisation dans lesdits connecteurs

Country Status (3)

Country Link
AU (1) AU1457292A (fr)
GB (1) GB2254968B (fr)
WO (1) WO1992019022A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2013994A (en) * 1978-01-27 1979-08-15 Minnesota Mining & Mfg Electrical connector
GB2018053A (en) * 1978-03-31 1979-10-10 Socapex Self-stripping contact element for connectors
GB1596347A (en) * 1977-12-13 1981-08-26 Krone Gmbh Electrical connectors

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1095619A (en) * 1966-08-18 1967-12-20 Telephone Mfg Co Ltd Improvements in or relating to electrical socket connectors
US3530422A (en) * 1968-03-25 1970-09-22 Elco Corp Connector and method for attaching same to printed circuit board
US3964816A (en) * 1974-08-22 1976-06-22 Thomas & Betts Corporation Electrical contact
US4421375A (en) * 1982-03-29 1983-12-20 Amp Incorporated Flag-type terminal having insulation displacement wire connection
US4743208A (en) * 1985-09-19 1988-05-10 Amp Incorporated Pin grid array electrical connector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1596347A (en) * 1977-12-13 1981-08-26 Krone Gmbh Electrical connectors
GB2013994A (en) * 1978-01-27 1979-08-15 Minnesota Mining & Mfg Electrical connector
GB2018053A (en) * 1978-03-31 1979-10-10 Socapex Self-stripping contact element for connectors

Also Published As

Publication number Publication date
GB2254968B (en) 1994-09-14
GB9107802D0 (en) 1991-05-29
GB2254968A (en) 1992-10-21
AU1457292A (en) 1992-11-17

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