EP0133094A1 - Elastische ausnehmbare Verbindungsklemme für elektrischen Anschlusskontakt - Google Patents

Elastische ausnehmbare Verbindungsklemme für elektrischen Anschlusskontakt Download PDF

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Publication number
EP0133094A1
EP0133094A1 EP84401475A EP84401475A EP0133094A1 EP 0133094 A1 EP0133094 A1 EP 0133094A1 EP 84401475 A EP84401475 A EP 84401475A EP 84401475 A EP84401475 A EP 84401475A EP 0133094 A1 EP0133094 A1 EP 0133094A1
Authority
EP
European Patent Office
Prior art keywords
terminal
tab
spiral
electrical connection
window
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.)
Granted
Application number
EP84401475A
Other languages
English (en)
French (fr)
Other versions
EP0133094B1 (de
Inventor
Philippe De Villemeur
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.)
A Gregoire & L Barilleau Ets
A GREGOIRE AND BARILLEAU ETS
Original Assignee
A Gregoire & L Barilleau Ets
A GREGOIRE AND BARILLEAU ETS
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 A Gregoire & L Barilleau Ets, A GREGOIRE AND BARILLEAU ETS filed Critical A Gregoire & L Barilleau Ets
Priority to AT84401475T priority Critical patent/ATE52362T1/de
Publication of EP0133094A1 publication Critical patent/EP0133094A1/de
Application granted granted Critical
Publication of EP0133094B1 publication Critical patent/EP0133094B1/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
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/28—End pieces consisting of a ferrule or sleeve
    • H01R11/281—End pieces consisting of a ferrule or sleeve for connections to batteries
    • H01R11/282—End pieces consisting of a ferrule or sleeve for connections to batteries comprising means for facilitating engagement or disengagement, e.g. quick release terminal
    • 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
    • H01R13/02—Contact members
    • H01R13/10—Sockets for co-operation with pins or blades
    • H01R13/11—Resilient sockets
    • H01R13/111—Resilient sockets co-operating with pins having a circular transverse section

Definitions

  • the present invention relates to a removable elastic connection terminal for an electrical contact terminal.
  • the invention is aimed at both female lugs to be engaged on male terminals and male lugs, which can be engaged in hollow tubular terminals.
  • the invention applies in particular but not exclusively to the lugs for spark plugs of internal combustion engines.
  • a second sought-after property is the limitation of the deformation of the terminal, during installation, or removal.
  • the plugs of automobile spark plugs are sometimes extracted obliquely with respect to the axis of the terminal (for example due to difficulties of access), which can cause permanent deformation of the terminal by exceeding the Elastic limit.
  • the terminal is no longer usable. This is what one seeks to avoid by providing the terminal with a locking means limiting its deformation.
  • the terminal must be snap-on. After being pushed in with reasonable force, it must remain snapped onto the terminal.
  • the terminal will be in one piece. This is also favorable to its reliability.
  • the object of the invention is to produce a terminal allowing a large clamping force, with a capacity for significant deformation, for example three to five times greater than that which is commonly accepted for this kind of connection element.
  • an electrical connection lug comprising at least one tubular contact part adapted to be removably elastically fixed on a terminal, this part being formed by winding a blank of substantially rectangular flat sheet metal with overlapping of the edges so as to form a spiral winding, is remarkable in particular in that a tab is cut in the vicinity of one end of the spiral and folded towards the contact face, or towards the terminal through a window, cut in the turns adjacent, the length of the tab being sufficient to project on the other face of the tube formed by the spiral so as to be able to come into contact with the terminal, the window being wide enough to allow the tab to move towards the either side when the spiral tightens or loosens.
  • spiral should not be retained here with a particular geometric meaning. It means that an edge of the sheet blank has passed over the opposite edge, for example in the case where the tubular part has only one turn. It is therefore possible that the largest part of the section has the shape of a circle, the part of the section forming the edge being placed over the other representing a deviation from the circular section.
  • the tab When it has a terminal engaged on a central terminal, generally full, such as a spark plug terminal, the tab is formed in the outer edge of the coil, and is folded inward. In the case of a hollow terminal, the terminal having to engage inside, the tab is formed on the inside edge of the coil, and is folded outwards.
  • the end of the tab folded back through the spiral forms both the electrical contact element, the locking member limiting elastic deformation, of the terminal itself, and the latching or clip-on member. ge coming to engage in a circular groove of the terminal.
  • the spiral tightens or loosens as the case may be, and the elastic deformation is limited by the arrival in abutment of the folded tab against an edge of the window.
  • the end of the tab must protrude substantially out of the window.
  • the projecting projection of the folded tab is greater than or equal to the thickness of the metal blank constituting the pod.
  • the tab is formed with at least one insertion ramp making an angle of the order of 20 to 40 °, cut in the blank of the tab or formed by folding this one.
  • the terminal can also advantageously include a latching ramp, opposite the previous one and forming an angle of 90 ° maximum, preferably 40 to 60 °.
  • the terminal behaves like a spiral spring of which only a part is brought into play during elastic deformations.
  • the proportion of the length of the spiral involved depends on the number of turns it comprises, and this length varies step by step (discreetly) depending on the number of turns n + 1/2.
  • the window pierced at. through the metal decreases the elastic force of the terminal
  • the height of the window in the direction of the axis of the terminal is less than or equal to one third of the length of the terminal when the spiral comprises more than one and a half turns, and less than or equal to three-quarters of the height of the blank when the spiral comprises less than one and a half turns. Indeed, as discussed below him, the the impact of the opening of the window is not the same in both cases.
  • the width of the window in the direction perpendicular to the axis of the terminal, is equal to the sum of the circumferential width of the tab and at least three times the possible radial displacement of the latter. , that is to say the projection of the tab out of the window.
  • the blank 1 shown in Figure 1 comprises a substantially rectangular part 2, intended to form the terminal 20 according to the invention. It may further comprise a part 3 intended for fixing a cable, and a part 4 for connection between these two parts.
  • the terminal can be used in these latter parts, for example one can solder a conductor there.
  • a tab 5 folded back so that it can pass through the window 6 when the rectangular part 2 is wound in a spiral (see FIG. 2).
  • the wings 7, 8 adjacent to the tab 5 can be kept or eliminated.
  • the rectangle 2 is therefore wound in a spiral, as shown in section in FIG. 2, to form a sleeve or a tube. If the tab 5 is located on the outer end of the spiral, it is folded inward ( Figure 2).
  • the lug 15 is located on the inner end of the spiral ( Figure 7) it is folded outwards.
  • a female lug is obtained, which can be engaged on a male terminal.
  • a male terminal is obtained, which can be engaged in a terminal dig.
  • Figure 2 shows a section perpendicular to the axis of the female terminal formed with the tab at the end of the spiral.
  • the dotted line shows in section the profile of the terminal in the free, relaxed state, the folded tab 5 projecting clearly inside.
  • the window will have a width which is at least the sum of the thickness of the tab (in the circumferential direction) and three times the maximum displacement of the tab, that is to say three times the distance from which it s 'protruding inside the terminal.
  • the tab 5 must extend inside the terminal, by a distance equal at least to the thickness of the metal and the terminal.
  • the tab 5 abuts against the edge 6a of the window 6, and the terminal cannot increase further.
  • the terminal cannot be deformed due to an abnormal force.
  • the terminal 10 is elastically clamped between the edge 5a of the tab 5 on the one hand, and the edge 9 of the rectangle 2 of the blank 1.
  • the effort elastic ensuring the electrical contact between the terminal and the terminal, exerted by these two points on the terminal, is developed over the length of the spiral between these two points, ie one and a half turns in the case of FIG. 2.
  • the flexibility is therefore important and electrical contact is ensured with wide tolerances on the diameter of the terminal.
  • a ramp 21 from approximately 20 to 40 0 .
  • This ramp can be obtained by suitable cutting of the blank, or by folding a metal wedge. In the case of the example shown in Figures 1 to 3, cutting is preferable.
  • the tab 5 comes to engage elastically in the groove formed on the terminal of the spark plug.
  • an electrical contact can also be established by one or the other of the ramps 21, 22 or both, instead of the straight edge 5a.
  • the tab 5 serves as a snap finger on the terminal, when the latter has an adequate groove.
  • a metal lug is produced in a single piece which performs the three desired functions.
  • Figure 4 shows in section through a plane intermediate to its axis, a terminal 41 formed by winding a blank over a little more than one turn, but less than one and a half turns.
  • the terminal is formed by a shorter spiral and also includes a lug 49 engaged in a window 43.
  • the terminal 45 on which the lug 41 is engaged is elastically clamped between the lug 49 and the point 44 diametrically opposite. It can be seen that, in this case, the length of spring interesting the clamping force of the terminal is half a turn of the spiral forming the terminal.
  • a possible extension 46 of the spiral will not interest the spring force, as long as this extension does not bring the length of the spiral to one and a half turns, that is to say as long as the inner end of the spiral is not diametrically opposite the tab projecting inside the terminal. It follows that the lengths of spiral interested in the elastic force increase discreetly as a function of the length of the spiral and are 1/2, 1.5, 2.5 etc. turns, provided that the spiral has between 1 and 1.5 turns, between 1.5 and 2.5 ... etc.
  • the part of the spiral interested in the elastic force is the part between the tab 49 and the opposite point 44, part which the window 43 does not include.
  • the part of the spiral interested in the elastic force comprises the window. Therefore, in this case of FIG. 4, less than 1.5 turns, the weakening caused in the resistance of the terminal by the cutting of the window does not affect the elastic clamping force of the terminal . It is however reasonable to limit the size of the window, the edge of which nevertheless serves as a limitation to elastic deformation.
  • the height of the window measured in the direction of the axis of the terminal will preferably be less than or equal to three-quarters of the length of the terminal (dimension h in FIG. 1). But, if the spiral measures more than 1.5 turns, the window is in the spring part, and its height in this case should be less or equal to a third of the length of the terminal.
  • this part 44 of the section of the terminal may have a circular profile, extends as far as possible on either side of point 44, possibly 'to the edge of the terminal, in the direction of the opening 43.
  • the section is thus circular over more than half of the periphery, which is favorable to electrical contact and tightening.
  • the tab 49 then participates in a minor way in the electrical contact. It always performs the role of a lock preventing the terminal from opening and the role of snap-fastening in the terminal groove.
  • FIGS 5 to 10 show two other variants of terminals according to the invention.
  • the blank of Figure 5 is similar to that of Figure 1.
  • a terminal 51 produced by spiral winding of the blank of Figure 5, placing inside the end of the rectangle which carries the tab 15.
  • a male terminal is obtained which can exert an extension force towards the outside, between the edge of the tab 15 and the outer edge 52 of the spiral.
  • the terminal can be introduced and wedged into a tubular socket, thanks to the cut shape of the tab 15, in a similar manner to that of the tab 5 of FIG. 3.
  • the tab 61 is formed by folding in the direction perpendicular to the axis of the terminal. It follows a window 62 smaller in the direction of the height, but longer in the direction of the width. The weakening of the elastic force of the spiral is less in this case, which may be better suited to the spirals of a turn and a half and more, in cases where the window is included in the part of spiral forming a spring.
  • the end 6la of the tab 61 is folded back to facilitate engagement and snap-fastening.
  • the slope of the insertion ramp can also be obtained by a false cut, that is to say a non-punching punching cut, leaving an oblique section.
  • the lugs described above have been presented in association with terminals, but according to the invention, they can be used as wire contact elements.
  • the contact tab can, in the idle state, engage deeply inside the terminal, possibly as far as touching the opposite wall.
  • an external element for example the tongue 6la (FIG. 6) raised towards the outside, to open the terminal, in order to allow the introduction of a non-rigid wire.
  • Figures 11 and 12 describe the application of the invention to a wire clamp contact.
  • the spiral 81 forms two and a half turns.
  • Two contact tabs 82, 83 are provided, cut to be able to engage deep inside the terminal, each through two windows: 85, 87 for the tab 83 and 86, 88 for the tab 82.

Landscapes

  • Manufacturing Of Electrical Connectors (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
EP84401475A 1983-08-02 1984-07-11 Elastische ausnehmbare Verbindungsklemme für elektrischen Anschlusskontakt Expired - Lifetime EP0133094B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84401475T ATE52362T1 (de) 1983-08-02 1984-07-11 Elastische ausnehmbare verbindungsklemme fuer elektrischen anschlusskontakt.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8312692A FR2550392B1 (fr) 1983-08-02 1983-08-02 Cosse de connexion elastique amovible pour borne de contact electrique
FR8312692 1983-08-02

Publications (2)

Publication Number Publication Date
EP0133094A1 true EP0133094A1 (de) 1985-02-13
EP0133094B1 EP0133094B1 (de) 1990-04-25

Family

ID=9291319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401475A Expired - Lifetime EP0133094B1 (de) 1983-08-02 1984-07-11 Elastische ausnehmbare Verbindungsklemme für elektrischen Anschlusskontakt

Country Status (4)

Country Link
EP (1) EP0133094B1 (de)
AT (1) ATE52362T1 (de)
DE (1) DE3482082D1 (de)
FR (1) FR2550392B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0780928A2 (de) 1995-12-22 1997-06-25 Delphi Automotive Systems Deutschland GmbH Einteiliges Kontaktelement

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1877830A (en) * 1929-06-19 1932-09-20 Nat Company Inc Electric terminal clip
US2623085A (en) * 1949-08-05 1952-12-23 Jr John R Gier Battery cable connector
US3141724A (en) * 1962-03-19 1964-07-21 Eugene B Raymond Terminal connector
US3504331A (en) * 1968-01-31 1970-03-31 Coop Ind Inc Socket contact for electrical connectors
FR2397726A1 (fr) * 1977-07-15 1979-02-09 Amp Inc Connecteur electrique notamment pour borne de batterie d'accumulateurs
FR2417856A1 (fr) * 1978-02-16 1979-09-14 Guell Catala Martin Cosse de connexion pour borne de batterie

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1877830A (en) * 1929-06-19 1932-09-20 Nat Company Inc Electric terminal clip
US2623085A (en) * 1949-08-05 1952-12-23 Jr John R Gier Battery cable connector
US3141724A (en) * 1962-03-19 1964-07-21 Eugene B Raymond Terminal connector
US3504331A (en) * 1968-01-31 1970-03-31 Coop Ind Inc Socket contact for electrical connectors
FR2397726A1 (fr) * 1977-07-15 1979-02-09 Amp Inc Connecteur electrique notamment pour borne de batterie d'accumulateurs
FR2417856A1 (fr) * 1978-02-16 1979-09-14 Guell Catala Martin Cosse de connexion pour borne de batterie

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0780928A2 (de) 1995-12-22 1997-06-25 Delphi Automotive Systems Deutschland GmbH Einteiliges Kontaktelement
EP0780928A3 (de) * 1995-12-22 1998-08-12 Delphi Automotive Systems Deutschland GmbH Einteiliges Kontaktelement
US5885117A (en) * 1995-12-22 1999-03-23 Delphi Automotive Systems Deutschland Gmbh One-part contact element

Also Published As

Publication number Publication date
EP0133094B1 (de) 1990-04-25
DE3482082D1 (de) 1990-05-31
FR2550392A1 (fr) 1985-02-08
ATE52362T1 (de) 1990-05-15
FR2550392B1 (fr) 1986-05-23

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