DK159410B

DK159410B - IMPLEMENTATION FOR A COAXIAL CABLE AND USE THEREOF

Info

Publication number: DK159410B
Application number: DK332284A
Authority: DK
Inventors: Gerard Froment
Original assignee: Orega Electro Mecanique
Priority date: 1983-07-08
Filing date: 1984-07-06
Publication date: 1990-10-08
Also published as: FR2548858B1; DK332284A; ATE26366T1; DK332284D0; EP0134163A1; DK159410C; JPS60138856A; DE3462975D1; FR2548858A1; EP0134163B1

Abstract

1. Feed-through or bushing for a coaxial cable (7) through a metallic wall (1), the metallic braid (9) of the cable being electrically connected to the wall, characterized in that the wall comprises deformations (4, 5) defining a substantially cylindrical volume accommodating the braid (9), the latter being soldered to these deformations.

Description

1 DK 159410 B1 DK 159410 B

Opfindelsen omhandler en gennemføring til et koaksial-kabel af den i krav 11 s indledning angivne art samt anvendelse heraf.The invention relates to a conduit for a coaxial cable of the kind specified in the preamble of claim 11 as well as its use.

Koaksiale gennemføringer eller kanaler igennem en metalvæg, eksempelvis en afskærmning for især de højfrekvente eller radiofrekvente kredse (VHF og/eller 5 UHF) i en modtager for rundkastede elektromagnetiske bølger, tilvejebringes konventionelt ved hjælp af et eller flere legemer, hvormed man kan fastklemme eller fastkrympe den kabelstrømpe, der udgør yderlederen af koaksialkablet, og derefter direkte eller indirekte Ί0 lodde kabelstrømpen på metalvæggen. Der eksisterer forskellige anordninger i form af bøsninger, ringe eller muffer af et ledende materiale til at fastkrympe den ombertlede kabelstrømpe på den isolerende yderkappe, sammensat af henholdsvis et eller flere legemer, der 15 skal deformeres ved hjælp af klemmer eller tilspændes ved omskruning, hvilket kræver en montering på metalvæggen enten ved lodning eller, som kendt fra tysk offentliggørelsesskrift nr. 25 22 898, ved en påskruet bøjle, som ligeledes udgør et ekstra legeme.Coaxial passages or channels through a metal wall, for example a shielding for especially the high-frequency or radio-frequency circuits (VHF and / or 5 UHF) in a receiver for broadcast electromagnetic waves, are conventionally provided by one or more bodies to be clamped or clamped the cable stocking constituting the outer conductor of the coaxial cable, and then directly or indirectly Ί0 solder the cable stocking on the metal wall. There are various devices in the form of bushings, rings or sleeves of a conductive material for shrinking the recirculated cable stocking on the insulating outer sheath composed of one or more bodies, respectively, to be deformed by means of clamps or tightened by screwing, which requires a mounting on the metal wall either by soldering or, as known from German Publication No. 25 22 898, by a screwed-on bracket which also constitutes an extra body.

2020

Opfindelsen har til formål at overflødiggøre ethvert ekstra legeme under tilvejebringelse af en mekanisk brudsikkerhed (over for træk) og en afskærmning, der er bedre end eller sammenlignelig med de mere kostbare 25 konventionelle løsninger.The invention has for its object to obviate any extra body while providing a mechanical (against tensile) fracture resistance and a shielding that is better than or comparable to the more expensive conventional solutions.

Dette opnås ifølge opfindelsen ved en gennemføring af den indledningsvis angivne art, som er ejendommelig ved den i krav l's kendetegnende del angivne udformning.This is achieved in accordance with the invention by an embodiment of the type indicated in the preamble, which is characterized by the design according to the characterizing part of claim 1.

3030

En yderligere aflastning over for tværgående trækspænding kan simpelt nås ved den i krav 2' s kendetegnende del angivne udformning med yderligere deformationer.A further relief against transverse tensile stress can simply be reached by the design of the characterizing part of claim 2 with further deformations.

3535

2 DK 159410 B2 DK 159410 B

Ved den i krav 8 angivne udformning opnås en simpel positionering af kabelkappen ved indmonteringen af kablet.In the embodiment of claim 8, a simple positioning of the cable sheath is achieved when the cable is mounted.

Gennemføringen ifølge opfindelsen er, som angivet i krav 9, især egnet til indføring af et antennekabel i en af 5 en metalvæg afskærmet TV-modtagers højspændingsdel.The embodiment of the invention, as stated in claim 9, is particularly suitable for inserting an antenna cable into a high voltage part of a metal wall shielded TV receiver.

Opfindelsen forklares nærmere nedenfor i forbindelse med tegningen hvor: 10 fig. 1-4 viser henholdsvis et snit igennem, en plan afbildning, en frontal afbildning og en perspektivisk afbildning af en gennemføring eller en kanal til et koaksialkabel igennem en metalvæg, 15 fig. 5 viser en ende af et koaksialkabel bearbejdet til indsætning i en gennemføring ifølge fig. 1-4 og til at danne en indgangsklemme til en elektronisk kreds, og fig. 6 viser enden af kablet på fig. 5 indsat i 20 gennemføringen ifølge fig. 1-4.The invention is explained in more detail below in connection with the drawing where: FIG. 1-4 respectively show a section through, a plan view, a frontal view and a perspective view of a passageway or channel for a coaxial cable through a metal wall; 5 shows an end of a coaxial cable machined for insertion into a duct of FIG. 1-4 and to form an input terminal for an electronic circuit; and FIG. 6 shows the end of the cable of FIG. 5 inserted into the embodiment of FIG. 1-4.

På figurerne er vist en del af en metalvæg 1, gennem hvilken et koaksialkabel skal indføres fra det ydre (vendende opad) til det indre (vendende nedad) af ek-25 sempelvis en metalkasse, der udgør en afskærmning. Gen nemføringen ifølge opfindelsen består af fire elementer 2-5, der tilvejebringes ved udskæring og oppresning ved hjælp af et eller flere dertil udformede redskaber, som er monteret eksempelvis på en prægepresse. Udskæringen 30 udgør en del af den første operation, og oppresningen kan foretages i to trin.The figures show a part of a metal wall 1 through which a coaxial cable is to be inserted from the outer (facing up) to the inner (facing down) of, for example, a metal box which forms a shield. The embodiment according to the invention consists of four elements 2-5, which are provided by cutting and raising by means of one or more tools designed therefor which are mounted, for example, on an embossing press. The cut-out 30 forms part of the first operation and the raising can be done in two steps.

Fra venstre mod højre (eller fra forsiden mod bagsiden) optræder en første fordybning eller indadgående frem-35From left to right (or from front to back), a first recess or inward forward appear

3 DK 159410 B3 DK 159410 B

spring 2, som gradvis nærmer sig bunden af væggen 1, der repræsenterer kassens indre, og udgør en cylinderformet udsparing eller rende, der hælder en vinkel α i forhold til væggens plan. Radius af den nedadgående cylinderflade, målt i forhold til en akse A, der krydser væggen 1 under den samme vinkel a, er valgt i det væsentlige 5 lig halvdelen af yderdiameteren D af hele koaksialkablet (indbefattet den isolerende kappe). Den første fordybning 2 efterfølges af et første opadvendende fremspring i form af en hældende hvælving 3, hvis indre radius i forhold til den hældende akse A ligeledes er 10 D/2. Hvælvingen 3 danner en opadvendende fordybning så ledes, at en fiktiv forlængelse af den første fordybning 2 sammen med fordybningen 3 danner et cylinderformet hul med en diameter på i det væsentlige D.spring 2, which gradually approaches the bottom of the wall 1, representing the interior of the box, and constitutes a cylindrical recess or groove inclined at an angle α with respect to the plane of the wall. The radius of the downward cylinder surface, measured relative to an axis A crossing the wall 1 at the same angle a, is selected substantially 5 equal to half of the outer diameter D of the entire coaxial cable (including the insulating sheath). The first recess 2 is followed by a first upward projection in the form of an inclined vault 3, whose inner radius relative to the inclined axis A is also 10 D / 2. The vault 3 forms an upward recess so that a fictitious extension of the first recess 2 together with the recess 3 forms a cylindrical hole having a diameter of substantially D.

15 Hvælvingen 3 efterfølges af en anden fordybning 4 i form af en hældende rende, som danner et nedadvendende fremspring og afgrænser en i det væsentlige halvcylinder formet overflade i forhold til den hældende akse A og med en inderdiameter på i det væsentlige d/2, hvor d 20 er mindre end D som forklaret nedenfor. Det fjerde og sidste element 5 af gennemføringen består af et andet opadvendende fremspring af samme form som, men inverteret i forhold til den første fordybning 2. Det andet fremspring 5 omfatter en inderflade, der udmunder 25 i inder fladen af væggen 1 og har en krumningsradius i forhold til aksen A i det væsentlige lig d/2.The arch 3 is followed by a second recess 4 in the form of an inclined gutter which forms a downwardly projecting surface and defines a substantially half-cylinder shaped surface with respect to the inclined axis A and with an inner diameter of substantially d / 2, where d 20 is smaller than D as explained below. The fourth and final element 5 of the insert consists of a second upwardly projecting projection of the same shape as, but inverted, relative to the first recess 2. The second projection 5 comprises an inner surface which opens 25 in the inner surface of the wall 1 and has a radius of curvature. relative to axis A substantially equal to d / 2.

De respektive længder LI, L2, L3 og L4 af de forskellige elementer af gennemføringen samt hældningsvinklen α for 30 aksen A vælges som funktion af koaksialkablets diametre.The respective lengths L1, L2, L3 and L4 of the various elements of the feed-through as well as the angle of inclination α of the axis A are chosen as a function of the coaxial cable diameters.

Længden LI af det første element 2 vælges eksempelvis i området 1,25-1,75 D og længden L2 for det andet element 3 i området 1,0-1,2D, idet længderne LI og L2 er hver især mindst lig med diameteren D. Det tredje element 4 35For example, the length L1 of the first element 2 is selected in the range 1.25-1.75 D and the length L2 of the second element 3 in the range 1.0-1.2D, the lengths L1 and L2 each being at least equal to the diameter D The third element 4 35

, DK 159410 B, DK 159410 B

4 og det fjerde element 5 af gennemføringen har dermed sammenlignelige længder L3 og L4 i området 0,8-1,2 d, hvor d svarer til kabelstrømpens yderdiameter, hvorved summen af deres respektive længder (L3 og L4) eksempelvis er tilnærmelsesvis lig med et dobbelte af diameteren d. Hældningsvinkelen a vælges fortrinsvis mak-5 simalt lig med 15°, og fortrinsvis imellem 10° og 15°.4 and the fourth element 5 of the bushing thus have comparable lengths L3 and L4 in the range 0.8-1.2 d, where d corresponds to the outer diameter of the cable stock, whereby the sum of their respective lengths (L3 and L4) is, for example, approximately equal to a twice the diameter d. The inclination angle a is preferably chosen at maximum equal to 15 °, and preferably between 10 ° and 15 °.

På et koaksialkabel af typen PPD med en diameter på eksempelvis 3,6 mm giver dette værdierne ca. LI = 6 mm, L2 = 4 mm, L3 = L4 = 3 mm, hvilket giver en totallængde 10 på ca. L = LI + L2 + L3 + L4 = 16 mm. Bredden af gennemføringen er højst nogle få mm større end diameteren D.On a PPD type coaxial cable with a diameter of, for example, 3.6 mm, this gives the values approx. LI = 6 mm, L2 = 4 mm, L3 = L4 = 3 mm, giving a total length 10 of approx. L = LI + L2 + L3 + L4 = 16 mm. The width of the feed is not more than a few mm larger than the diameter D.

Såfremt hældningsvinkelen α formindskes, øges total-15 længden og længden af de enkelte elementer 2-5 eller antallet af disse. Fortrinsvis bør der altid være mindst fire elementer, hvoraf de to sidste 4 og 5 tjener til lodning af kabelstrømpen ved mindst to punkter.If the angle of inclination α decreases, the total length and length of the individual elements 2-5 or the number thereof are increased. Preferably, there should always be at least four elements, of which the last two 4 and 5 serve to solder the cable stock at at least two points.

20 Som vist på fig. 5 præpareres enden af det koaksialkabel 7, der skal indsættes i gennemføringen ifølge opfindelsen, ved først at afisolere den centrale leder 11 (eksempelvis bestående af snoede kobbertråde) langs en vis strækning med henblik på fortinning (eksempelvis ved 25 lodning). Derefter aftages kablets isolerende yderkappe 8 langs en foreskreven strækning, der overstiger summen af længderne L3 og L4 (L3 + L4 = ca. 6 mm), følgende afstanden af indgangsstedet (for lodningen) af lederen 11 langs en stationær dorn eller bøsning af metal.20 As shown in FIG. 5, the end of the coaxial cable 7 to be inserted in the embodiment of the invention is first prepared by de-insulating the central conductor 11 (e.g., consisting of twisted copper wires) along a certain stretch for dilution (e.g. by soldering). Then, the insulating outer sheath 8 of the cable is taken along a prescribed stretch exceeding the sum of the lengths L3 and L4 (L3 + L4 = about 6 mm), following the distance of the entry point (for soldering) of the conductor 11 along a stationary mandrel or sleeve.

30 Eksempelvis fjernes en strækning på L5 + L6 = 2 (L3 + L4) af den fra afskærmningskassen isolerede isolationskappe 8. Derefter afkortes metalstrømpen 9 (eksempelvis af krydsbundne kobbertråde), der udgør yderlederen, så meget, at dens længde L5 er i det væsentlige 35For example, a stretch of L5 + L6 = 2 (L3 + L4) is removed from the insulating sheath 8. Insulated from the casing box. Subsequently, the metal stocking 9 (e.g., of cross-linked copper wires) constituting the outer conductor is cut off so much that its length L5 is substantially 35

5 DK 159410 BDK 159410 B

lig med L3 + L4 for de to afsnit med den mindre radius (d/2). Derefter fortinnes også strømpen 9. Herved er der altså fremstillet en strækning af blank fortinnet leder 11, en blank isoleret indre strækning 10 med en længde på L6 samt en strækning L5 af sidstnævnte overdækket af den fortinnede strømpe.equal to L3 + L4 for the two sections with the smaller radius (d / 2). Then, the stocking 9. Also tinned is thus made a stretch of blank tinned conductor 11, a blank insulated inner stretch 10 of length L6 and a stretch L5 of the latter covered by the tinned stocking.

55

Den på fig. 5 viste præparerede kabelende indføres nu i gennemføringen som vist på fig. 6, der viser monteringen af elementerne med henblik på at føre et højfrekvent signal til det indre af kassen.The FIG. 5, the prepared cable ends shown in FIG. 6, which shows the mounting of the elements for conveying a high frequency signal to the interior of the box.

1010

Det første par elementer 2 og 3, dvs. den første fordybning 2 og hvælvingen 3, tjener til at optage den isolerende yderkappe 8 og til at lede kabelenden under indføringen. Det sidste par elementer 4 og 5, dvs. den 15 hældende rende 4 og det andet opadvendende fremspring 5, omgiver strækningen L5 af den fortinnede strømpe 9. Idet væggen 1 også er fremstillet af en fortinnet tyndplade (eksempelvis af kobber), loddes kabelstrømpen 9 ved hjælp af en konventionel tin/bly-lodning langs over-20 fladerne 12 og 13 ud for elementerne 4 og 5.The first pair of elements 2 and 3, i.e. the first recess 2 and the arch 3 serve to receive the insulating outer sheath 8 and to guide the cable end during insertion. The last couple of elements 4 and 5, ie. the sloping gutter 4 and the second upwardly extending projection 5 surround the line L5 of the tinned stocking 9. Since the wall 1 is also made of a tinned thin plate (e.g. of copper), the cable stocking 9 is soldered by means of a conventional tin / lead solder. along the upper surfaces 12 and 13 next to the elements 4 and 5.

Det bemærkes, at den formindskede diameter d af renden 4 muliggør at føre enden af den isolerende kappe 8 til anlæg med henblik på at tilvejebringe en ret præcis 25 positionering af enden af kablet 7.It is noted that the diminished diameter d of the gutter 4 enables the end of the insulating sheath 8 to be guided to provide a fairly precise positioning of the end of the cable 7.

30 3530 35

Claims

Entry into a coaxial cable (7) comprising a central conductor (11), a surrounding metal stocking (9) and an outer insulating jacket (8), through a metal wall (1) to which the metal stocking cable (9) ) must be electrically connected, characterized in that the metal wall (1) is formed with deformations (4, 5) defining a substantially cylindrical space for receiving the cable stock (9), to which deformations 10 the cable stock can be soldered to form it. electrical connection.

Transmission according to claim 1, characterized in that the metal wall (1) is formed with other deformations (2, 3) for accommodating the insulating cable sheath (8), located near the deformations (4, 5) for accommodating of the cable stocking (9).

Transduction according to claim 2, characterized in that the deformations (2, 3) for receiving the insulating cable sheath (8) define a cylindrical space with the same axis (A) as that of the deformations (4, 5) for receiving the the space delimited by the cable stock (9).

Transmission according to claim 3, characterized in that the common axis (A) of the deformations (2-5) forms an angle (a) with the wall (1) in the range 10 ° -15 °.

Transmission according to claims 1-4, characterized in that there are two deformations (4, 5) for receiving the cable stock (9) and that the length (L3, L4) of each of them is substantially equal to the diameter of cable stocking (9). 35

Transmission according to claims 2-5, characterized in that there are two deformations (2, 3) for receiving the insulating cable sheath (8) and whose length (L1, L2) is at least equal to the outer diameter of the insulating sheath ( 8).

6 DK 159410 B

Transmission according to claims 1-6, characterized in that the deformations are designed as cuts in and extensions of the metal wall (1).

7 DK 159410 B

Transmission according to claims 1-7, characterized in that the end of the insulating sheath (8) abuts a deformation (4) of the wall (1) receiving the metal stocking (9).

Use of a passageway according to claims 1-8 for introducing a coaxial cable conducting from an antenna received from an antenna through a cut-off metal wall surrounding the high-frequency part of a receiver for broadcast electromagnetic waves.