NO128353B

NO128353B -

Info

Publication number: NO128353B
Application number: NO01350/71A
Authority: NO
Inventors: S Hasselbohm
Original assignee: Ericsson Telefon Ab L M
Priority date: 1970-04-08
Filing date: 1971-04-07
Publication date: 1973-10-29
Also published as: US3703700A; ES198365Y; ES198365U; DE2114708B2; DE2114708A1; CS156492B2; DK137779C; DK137779B; FI53903B; CA919788A; JPS547952B1; FI53903C; SU485610A3

Description

Koblingsskive for skruefri tilkobling av isolerte ledere. Connection disc for screwless connection of insulated conductors.

Oppfinnelsen vedrorer en koblingsskive for skruefri forbindelse av isolerte ledere, omfattende et antall i en holder av isolerende ma-terialer fikserte kontaktblikk. Det har lenge vært kjent ved kob-lingsskiver, f.eks. for telefonkabler, å utforme kontaktblikkene slik at lederne i kablene kan tilkobles uten foregående avisole-ring og uten anvendelse av sammenkoblingsskruer. Kontaktblikkene er da forsynt med en sliss som går ut fra et hull, idet hullets diameter er noe storre enn den isolerte leders og slissens bredde er noe mindre enn den avisolerte leders diameter. Tilkoblingen skjer da ved at lederen tres gjennom hullet og fores ned i slissen, hvorved dennes kanter skjærer seg gjennom isoreingen. Derved dannes to kontaktflater og lederen fastholdes. Ulempen med et slikt kontaktblikk er bl.a. at da den avisolerte leders diameter varierer noe, blir det vanskelig å dimensjonere slissen således at såvel en god elektrisk kontakt som en stabil mekanisk forbindelse fåes. Videre kan blikket ikke gjbres alt for tynt av hensyn til den mekaniske stabilitet. Hensikten med oppfinnelsen er å tilveiebringe en koblingsskive forsynt med kontaktblikk utformet for skruefri tilkobling, hvor en bedre kontakt fåes som er mindre fblsom for variasjoner i lederens diameter enn hva som har vært tilfelle ved tidligere anvendte konstruksjoner, og hvor dessuten lavere materialomkostninger oppnåes. Oppfin-nelsens karakteristiske trekk fremgår av kravenes karakteristikk. The invention relates to a connection disc for screwless connection of insulated conductors, comprising a number of contact plates fixed in a holder of insulating materials. It has long been known for clutch discs, e.g. for telephone cables, to design the contact points so that the conductors in the cables can be connected without previous stripping and without the use of connecting screws. The contact plates are then provided with a slot that extends from a hole, the diameter of the hole being somewhat larger than that of the insulated conductor and the width of the slot being somewhat smaller than the diameter of the stripped conductor. The connection then takes place by threading the conductor through the hole and feeding it into the slot, whereby its edges cut through the insulation. Thereby, two contact surfaces are formed and the conductor is held in place. The disadvantage of such a contact gaze is i.a. that as the diameter of the stripped conductor varies somewhat, it becomes difficult to dimension the slot in such a way that both a good electrical contact and a stable mechanical connection are obtained. Furthermore, the tin cannot be made too thin for reasons of mechanical stability. The purpose of the invention is to provide a connection disc provided with a contact plate designed for screwless connection, where a better contact is obtained that is less susceptible to variations in the diameter of the conductor than what has been the case with previously used constructions, and where, moreover, lower material costs are achieved. The characteristic features of the invention appear from the characteristics of the claims.

Oppfinnelsen skal forklares nærmere under henvisning til teg-ningene, hvor The invention shall be explained in more detail with reference to the drawings, where

Fig. 1-3 viser en koblingsskive ifblge oppfinnelsen.sett forfra, fra siden resp. ovenfra. Fig. 4 og 5 viser to forskjellige utfbrelsesformer av de kontaktblikk som inngår i koblingsskiven for bbyning. Fig. 6 viser de samme kontaktblikk fra kanten i ferdigbbyet til-stand. Fig. 1-3 shows a clutch disc according to the invention. seen from the front, from the side or from above. Fig. 4 and 5 show two different versions of the contact plates that are included in the connecting disc for building. Fig. 6 shows the same contact views from the edge in the finished condition.

Fig. 7 viser kontaktblikkets nedre del sett perspektivisk. Fig. 7 shows the lower part of the contact plate seen in perspective.

Fig. 8-lo viser en modifisert form for en koblingsskive ifblge oppfinnelsen sett forfra, fra siden resp. ovenfra. Fig. 8-lo shows a modified form of a coupling disc according to the invention seen from the front, from the side or from above.

I fig. 1-3 er 1 en holder som fortrinnsvis kan være stbpt i et stykke av et eller annet isolerende materiale. Holderen er be-regnet for montering av et.antall kontaktblikk 2, av hvilke for enkelhets skyld bare et blikk er vist. Holderen er for hvert blikk forsynt med to T-formede uttagninger 3 og 4, som ligger rett overfor hverandre,, av hvilke uttaket 3 er gjennomgående, mens uttaket 4 bare går et stykke inn i holderen. Ifblge eksemplet er uttakene utfort i form av spor, som hulrom i hel lengde eller en del derav. I uttakene kan kontaktblikkene, f.eks. utformet ifblge fig. 4, fikseres efter at de er bbyet 180° efter en tverrlinje som deler et symmetrisk anbragt avlangt hull 6 i to like store deler, og med sin lengere resp. kortere bbyde del er blitt innfort i uttagningene 3 resp. 4. For å redusere risikoen for krypstrbm mellom de forskjellige blikk, kan disse adskilles av lister lo. Ifblge fig. 4 er blikkets nedre del utformet på i og for seg kjent måte med en fra et hull 8 utgående sliss 9 for skruefri tilkobling av ledere som går ut fra skivens nedre del. Blikket 2 er videre forsynt med to fra hullet 6 utgående slisser 7a, 7b. Ved blikkets ovre del er holderen forsynt med en utskjæring 5 som skjærer gjennom veggen mellomutakene 3 og 4. Lederen tilkobles da til blikkets ovre del ved at den via hullet 6 fores ned i slissene 7a, 7b. Derved skjærer slissenes kanter seg gjennom lederens isolering og fire elektriske kontakter dannes, hvorved en betydelig stbrre elektrisk funksjonssikkerhet fåes enn ved tidligere anvendte konstruksjoner, samtidig som den mekaniske holdfasthet selvsagt bedres, til tross for at blikket kan gjbres betydelig tynnere enn tidligere. For ytterligere å bedre funksjonssikkerheten, er det videre gunstig at de to slisser 7a, 7b har noe forskjellig bredde, slik at en god kontakt fåes selv om lederens diameter varierer noe, hvilket i praksis som regel er tilfelle. In fig. 1-3, 1 is a holder which can preferably be fixed in a piece of some insulating material. The holder is designed for mounting a number of contact lenses 2, of which only one lens is shown for the sake of simplicity. The holder is for each eye provided with two T-shaped sockets 3 and 4, which lie directly opposite each other, of which the socket 3 is continuous, while the socket 4 only goes a little way into the holder. According to the example, the outlets are laid out in the form of grooves, as cavities in the entire length or a part thereof. In the sockets, the contact lenses, e.g. designed according to fig. 4, are fixed after they have been bent 180° along a transverse line which divides a symmetrically arranged elongated hole 6 into two equal parts, and with its longer resp. a shorter bbyde part has been inserted in the sockets 3 resp. 4. In order to reduce the risk of cryptstrbm between the different looks, these can be separated by lists lo. According to fig. 4, the lower part of the sheet is designed in a manner known per se with a slot 9 coming out of a hole 8 for screwless connection of conductors that exit from the lower part of the disc. The sheet 2 is further provided with two slits 7a, 7b extending from the hole 6. At the upper part of the can, the holder is provided with a cut-out 5 which cuts through the wall the intermediate outlets 3 and 4. The conductor is then connected to the upper part of the can by feeding it via the hole 6 into the slots 7a, 7b. Thereby, the edges of the slits cut through the conductor's insulation and four electrical contacts are formed, whereby a significantly greater electrical functional safety is obtained than with previously used constructions, while the mechanical strength is of course improved, despite the fact that the tin can be made significantly thinner than before. In order to further improve the functional safety, it is also advantageous that the two slits 7a, 7b have slightly different widths, so that a good contact is obtained even if the diameter of the conductor varies somewhat, which in practice is usually the case.

I fig. 5 vises en ytterligere utfbrelsesform av kontaktblikket In fig. 5 shows a further embodiment of the contact sheet

2. Ved det i fig. 5 viste blikk utgår således slissene 7a, 7b fra to separate hull 6a, 6b, hvilke efter bbyning vil bli liggende rett overfor hverandre. Derved fåes en stbrre mekanisk holdfasthet for blikket, hvilket i visse tilfeller kan være onskelig, selv om da lederen må tres. For at kontaktblikket, f.eks. ved fjernelse av tidligere innkoblede ledere, ikke skal kunne gli i sine uttak og således ikke lenger innta riktig stilling i holderen, kan kontaktblikket, som det fremgår av fig. 4,5,6 og 7, i den nedre del fortrinnsvis forsynes med en preget stopper 12, som har en i retning fra enden av blikkets lengre del stigende flate for å lette innfbring av kontaktblikket i holderen, hvilket muliggjbres ved holderens fjærende konstruksjon. Som det fremgår av fig. 1 ligger stop-peren, når kontaktblikket er fiksert i holderen, an mot bunn- 2. By that in fig. 5 shown, the slits 7a, 7b thus proceed from two separate holes 6a, 6b, which after bending will lie directly opposite each other. This results in a better mechanical hold for the eye, which in certain cases may be desirable, even if the conductor has to be threaded. In order for the contact lens, e.g. when removing previously connected conductors, should not be able to slide in their sockets and thus no longer occupy the correct position in the holder, the contact plate, as can be seen from fig. 4,5,6 and 7, in the lower part is preferably provided with an embossed stopper 12, which has a rising surface in the direction from the end of the longer part of the tin to facilitate insertion of the contact tin into the holder, which is made possible by the holder's springy construction. As can be seen from fig. 1, the stopper, when the contact lens is fixed in the holder, rests against the bottom

kanten av en utskjæring 11 i holderens nedre del. Ved å av- the edge of a cut-out 11 in the lower part of the holder. By de-

slutte stopperens nevnte flate med en mot blikket omtrent vinkelrett flate 13 og anbringe denne på en sådan avstand fra blikkets bbyningsakse, snepper den omtrent vinkelrette flate inn i ut-skjæringens 11 bunnkant når blikket er blitt innfort på plass i sine uttak 3 og 4. end the aforementioned surface of the stopper with a surface 13 approximately perpendicular to the tin and place this at such a distance from the tin's bending axis, the approximately perpendicular surface snaps into the bottom edge of the cut-out 11 when the tin has been inserted into place in its sockets 3 and 4.

Fig. 8-lo viser en modifisert form for koblingsskiven ifblge oppfinnelsen sett forfra, fra siden resp. ovenfra. Kontaktblikket legges inn på plass og bbyes ytterligere en gang 180°. Kontaktblikkene kan fortrinnsvis modifiseres i forhold til de eksempler som er vist i fig. 4-6, slik at man eksempelvis har samme form på hullet resp. hullene i blikkets begge ender. En koblings- Fig. 8-lo shows a modified form of the clutch disc according to the invention seen from the front, from the side or from above. The contact sheet is placed in place and bent a further 180°. The contact plates can preferably be modified in relation to the examples shown in fig. 4-6, so that, for example, the hole has the same shape or the holes at both ends of the gaze. A coupling

skive ifblge sistnevnte eksempel har selvsagt ikke like lange krypstrbmstrekninger mellom blikkene som den foregående, men for anvendelse innendors er isolasjonsresistansen i normale tilfelle tilfredsstillende. disc according to the latter example obviously does not have as long creepage distances between the faces as the previous one, but for indoor use the insulation resistance is normally satisfactory.

Claims

1. Connecting disc for screw-free connection of insulated conductors, comprising a number in a plate-shaped holder (1) of insulating material with two long sides and two short sides fixed contact plates (2), characterized in that the holder is partly provided with corresponding to each contact plate, parallel to short side-

ne continuous and on one side of the plate arranged, through outlets (3), partly with at least one arranged on the other side of the plate, directly opposite the through outlets, lying from one long side of the holder, not through outlets (4) and at least one cut-out (5) extending from the aforementioned one long side of the holder, which cuts through the part of the plate that lies between the two outlets, and that each contact point is bent at least once 180° around a transverse line that divides the contact point into a longer and a shorter part, and that the longer part is inserted into the continuous outlet, the directly opposite parts of the contact plates being provided with from at least one hole (6 or 6a, 6b) in the outgoing contact plates, directly opposite each other.lying slots (7a,7b), with the help of which a conductor can be connected to the contact sheet by inserting it into the holes and pressing it down into the slots.

2. Connecting disc as specified in claim 1, characterized in that the slots (7a, 7b) lying directly opposite each other in each contact plate have different widths.

3. Coupling disc as specified in claim 1 or 2, characterized in that the holder (1) for each contact plate, apart from the cut-out (5) which extends from one long side of the holder, is provided with a second cut-out (11) extending from the other long side of the holder, and that each contact tin (2) in the longer part is provided with an embossed stop (12) which has a rising surface in the direction from the end of the tin's longer part which terminates with an approximately perpendicular surface (13) to the sight and is at such a distance from the sight's bending axis that when the sight has been inserted into its recesses (3,4), said perpendicular surface snaps over the bottom edge of said second cut-out.

4. Connecting disc as stated in claim 1 or 2, characterized in that a non-through outlet is arranged directly opposite both ends of the through outlet, and that the part of the contact plate projecting from the other long side of the holder is bent 180°, and both the bent parts are fitted in each of the respective non-through outlets.