ANTI-SLIP FIXING DEVICE FOR RIBBON-TYPE STRAPS AND CABLES

Abstract: Anti-slip fixing device particularly for the purpose of fixing ribbon-type straps, cables in ribbon cable connecting assembly units. In the arrangement according to the invention, the fixing elements are realized by cylindrical pins, which form surfaces according to orthogonal trajectories on the surface of the ribbon cabel, in which the friction arising against the pulling force is of quadratic magnitude compared to application of the continuous, linear fixing gate.

Description: AIT I- SLI? PIZI-.7G- DEVICE ?OR RIB30ΪT-TYRE SI-RAPS AITD CABLES TECH2ΪICAL FIELD The invention relates to an anti-slip device for ribbon-type straps and cables, particularly in assemb¬ ly units connected with, ribbon cables. 5 BACKGROUND AR? Such cable arrangement is understood by ribbon cable, in whic the electrically conductive metal is a me¬ tal wire of circular cross section, or flattened metal rib¬ bon, or optical lead v/ires laid parallel with and next to 10 each other are arranged with continuous insulation, and the distances of the lead wires measured from each other are u z. — _-} -/ ;ι-_- _--.g <j_. w_._.-_: jj_-.c- ._t_:;-. ...-- u__i Use of the ribbon cables is preferred especially it , in those apparatuses, where the cable follows the shape of the structure, or the components may shift within an appara- 3 or eouit env. -he fle;:icle, r.uL i-'.virs ri ' c.ton oacles are mostly used witn couplings fitted to tne two ends. Ihe -...he couplings are required to ϊ±r. the band shape of tne rib- 0 bon cables without- slipping and to prevent the mechanical j.oin s of the thin wires of low strength from breaking off the printed circuit plate, or from its apparatus. The invention relates to such ribbon cacle fi- ing, 5 antirslip device, which prevents loosening or breakage of - 2 - the mechanical joints arising as a result of the slip, j fixing the ribbon cable without capable of slipping, and the apparatus itself consists of less components than the apparatuses known so far, its procuction is simpler, assπ 5 ly easier and no failure will occur when the cables are c nected up cr pulled out of the coupling. ■ Ihus the invention is such a fixing device whic_ prevents the slip and for this purpose it forms the multi¬ tude of concentric circles as orthogonal trajectories on i 0 surface of ribbon-type straps, particularly on the surface of ribbon cables, and i-t consists suitably of two half pie ees. A fixi g chamber is on one of the half nieces and fix pins exten from the other half piece, to zr. cavity of the fixing chamber when assembled. 5 -he invention is explained by way of the enclose drawings and tine presently used general types are introduc ΞRIΞ-F DESCRIPTION 0? D TTIITGS Figure 1 illustrates, the. connecting assembl ni ' in which the ribbon cable is folded bac between two 0 main parts cf the device enframing a distance i oj. Figure 2 illustrates an assembly unit in which tv ribbon cable couplings are assembled. Figure 3 demonstrates the general!; * introduced, simple interlaced type. 5 Figures 4-6 are general arrangements of the solu¬ tion according to the invention- Figure 7 is suitable embodiment of the invention. Figure S is embodiment according to the inventio including the ribbon cable and illustrates the orthogonal trajectories arising from the surface of the ribbon cable. Figure 9 is section of the ribbon cable * , formed by the fixing pins and its position can be interpreted according to the intersecting planes marked in Figure 3. Figure 10 illustrates the suitable connection of the assembly units according to the invention. BE52 I.:0DΞ OF CARRYING OUT THE INVΕ2TTI0I In the generally used embodiment according to Figure 1, the ribbon ca-ble is narked with reference number 9, the ribbon cable 9 folded back for the contacting part is narked with 9a, the two half pieces are 20, 21, the dis- ϊ --- &.——(-». * -__.. 7 ,7' -.—-i. f -—-, —i. T J* —a —> -v-. _- * .~n-- η-.Onk_. n- * .o— __• *" .c__τ --"-/--_l_-. ' --'_.c .—i' _- * . l---i.o--. ■ ■ * - α ^ .4 * , -, - -* -^ „-. -; « -. — . __ ~ ,_, ,^ -. — _ _. ^ -^ .. _, ÷- '-, - n r 1 • -. used by the United Kingdom patent o. 1 317 263 and US pa- Figure 2 illustrates the general view of such ribbon c-able coupling which demonstrates the connection of tv.-;, _;"-:-.; * te ric ' cn cables. In the order of the reference numbers the ribbon cable is 9, the ribbon cable end formed for the contact is 9a, the two half pieces encasing the end of the ribbon cable are 20 and 21, and the half pieces of tne other ribbon cable are marked with 30, 31, 32. Such solution is shqwn in the patent disclosure !o. D'ϊ 1 80S 453. " * ...Figure 3 shows the generally known, simple inter¬ laced type, where the ribbon cable is 9, end of the ribbon cable formed for contact is 9a, the anti-slip fixing device formed as a single piece is marked with £ f 'rrrr ~ Similar devices are shown in the US patent specifications Ho. 3 S23 443 and 4 038 72 β , furthermore in DT ITo. 1 202 where the continuity of the ribbon cable plane is broken by parallel protruding elements preventing the slip by stretching, and fixing it in the required position. Slip occurs in any of the mentioned solutions during actuation. In the interest of safer fixing such solution is known whi employs multiple back- olding, as shown in disclosure Ho. DT 2 OlS 935, and such solution is also known, according to which the ribbon cable laid in a trough is fixed in anti-slip position by a separate clamping element and the trough is fitted with separate fixing pins to the circuit plate, bringing about the outlet of the ribbon cable. Thus • ibben ca ble with use cf 1: '.-= _: v-. -o * 1 = c_ — - " . is. perpendicular to the lead wires of the ribbon cable. The ribbon cable suffers continuous ending du ing its pu. -out, and connecting-up activities, but at the same time the previously bent parts are straightened, and t_ uπαesi- rable slio ."joint of the lead wires OJ tne r-LDCon cacie alter outi.e- of the circuit - olate. '_-ne _L.nventt.on orevents tne s " * i!t-D oy iusing the recognition, " hat in place of the linear fixing gate - know according tc the present state of the technique - pins are used as fixing elements. ' .Vhen the ribbon cable is fixed wit hollow formation occurs on the surface of the ribbo SAG OH/GI AL - 0 - cable corresponding to the locations of the pins, the for¬ mation of which can be interpreted according to the dee - -drawing process * In this case not only the force necessary for the bending and straightening will arise when* the ribbon is pulled through, as in case of the linear fixing gate, but greater force effects valid for the deep-drawing will arise. This phenomenon is shown in Figure 8. The half pieces 5 are the mirror images of each other, the fixing pins 8 are arranged in one of the half pie- ces, while the " ribbon ' cable- 9 is pressed into the other half at h e height determined by pins 8. In the arrangement according to the invention, geo¬ metry of the shape transformation developed in the ribbon cab- ι ~_ r>ι - ... i. The -* — lated literature can be found in- Volume IV. of tne Technical I.Ia hematics in chapters titled as differential equations and geometric demonstration on pages Ic—22 (G.MI3K C-c-564 /-) , fur¬ thermore on pages 59-64 of volume VI in chapter of the two- -dimensional vector fields (O ΫDI SSo--7/5) - Thus the invention realised sue-: fixing de ice ;„ * the anti-slip assembly unit of ribbon cable, which - for the purpose of fastening - forms orthogonal trajectories and suitably consists of two half pieces 5a • 5 or pairs £1-66 as variations oi nan pieces _?c, ?<_., lurtnermore oi circular cr elliptic cross sectional fixing pins 8 cr fixing holes IC and some kind of conventional fastening element 11, hold¬ ing the two half pieces together and bored blocks or holes 11a formed for this purpose and rigid or flexible fixing elements 6a, 6b for the purpose of further fastening- Ξac. of the two half pieces has fixing chamber and firing pins 61, or fixing pins are in the chamber of one half piece fitted to the pinless chamber 62 of the other half piece 63, or fixing pins are in the flanged chamber 64 of one half piece and along the plane of the other half piece fitted to it, or fixing pins are along the plane of both half pieces 65 fitted to each other, or bored holes are in the plane of one half piece 66 fitted to the fixing pins formed from the plane of the other half piece. -Pixing chamber is called the cavity 10, formed according to 10, 10a, 10b surrounded with flange, or re¬ cessed in plane 5d. However, the aήti-siip fixing is realized even when the fixing pins protrude from the plane as shown in • 4 — 4 ^-i- —-" • -> J r-r -.m --: -,-. • _Q T--Ϊ y_~ — half- oieces is possible in a line along the plane perpendicular to the naif piε-i-e, tr parallel in several planes and several lines but at .joining the two half pieces the projections of the pins 61, 64, 65 according to the longitudinal axis are free from penetration, are not. in contact with each other, fur¬ thermore it is possible to have a cavity formed in the fixing chamber opposite the pins in the arrangement accordi: to 6 of --figure 6, and the perpendicular projections of the oins of one half oiece and the cavities of the other half BADORKa" *-- piece coincide with each other. Shape of the fixing pins 8 is circular, or ellip¬ tic, at which the difference between the small and large axes is less than half of the small axis. The rounding radius 5 r_ of the fixing surface of the pins, i.e. that of the inter¬ section edge of the cylinder jacket and flat surface is sui¬ tably less than 0.1 mm. Height of the fixing pins conforms to the height of flanges 5a, b and height of the flanges conforms to the mechanical parameters of the ribbon cable 9, 0 which is not subject of this invention. Sum of the pinfs) diameters is greater than l/8th of the ribbon width. The invention is based partly on this recognition. This is veri¬ fied in Volume V of the"LIechanical and Electrical Engineer I.anual" by Pattantyus in connection with bending on page 5 288 and deep-drawing on page 30ό. The fixing element used according to the invention is pin-like, as illustrated and explained under item -To. 3. • The earlier used fixing elements are cf gate type, shown inEigure 1-3 * which may be regarded as the line of continuous T' -- r ~ '.. ' hen tne half pieces according to ' Figures 7 and 8 are joined, the pin-type fixing elements press the cable with greater force than the ribbon, as if a linear fixing -.-ate were formed for this Duroose. The gr- eater pressing force arises higher frictional force on the contacting surfaces against pull-out, thus the anti-slip grip means considerable relief for the soldered wires of the ribbon cable. a - In addition to the friction force between the clamping half pieces, a deformation resistance arises in the ribbon against pull-out of the ribbon. In case of usin linear fixing gate, the ribbon suffers continuous bending, but straightening of the bent parts takes place just as wel In case of pin-like fixing element, continuous ■• lopside • ' deep-drawing is brought about at passage of the ribbon, because the side of the pin-like fixing element opt site the pulling direction continuously shapes the ribbon . According to the quoted literature, the force requirement of the deep-drawing starting from the stationary state is higher than that of the bending, consequently the force re¬ quirement for pulling through the pin-like fixing element tha e orocess oerformed on the fi ing The ciamoing half nieces developed with Din-like -t as snown m figure b, - αue to tne mgner :e arisins from the creater o ssure force an acams ' tiling force acting on me r coon. me -.--.ea -. —.. -..- .Λ. __.<_- -■ ;-. , "urtner aavanta~e ι_ r--. -,-ι --. - a amst ne o _-.ms r orce actin.s: o. -i .o c.on m a y tne p ane oi r- itlhl- 'e r ■ "1i *o-. .o" * ! ro. nn is more eriective, because the intersection points of ribbon 9 form curvilinej section according to Figure 9. The sections containing ' tne symmetry axis of the pin-like 8 guiding element are shown IGINAL in figure 9, where the sections are marked the same way, as the surface of the ribbon cable 9, shown in Figure 8, furthermore the spatial deformations of ribbon cable 9 are comparable with, the directions of the fixing pins 8. Prom the relationship related to deep-drawing t bending in the quoted literature it is apparent, that ratio of deep-draw¬ ing - bending will be greater than 1, if 8- ime3 the pin diameter d_) ribbon width b_ is higher than 1. From the re¬ lationship it follows that diameter d_ of the fixing pin ' 8 must be greater than -1/8-th of the ribbon width _. Thus in every case when diameter α_ of the pin-like fixing element is greater than l/8th of the ribbon width, a greater force is necessary for fixing the ribbon, than in case of the ' . " hen for constructional reasons diameter d_ of the pin-like fixing element can not be increased to the ribbon width _ to such extent, that d_ should remain greater than 1/3 j 3, then it is necessary to ncrea'se the number of pin- -like fixing elements until the condition of -ά_ being greater elemen s. Prom the suitable embodiment of the solution ac¬ cording to the invention shown in Figure 7, it is recognizab¬ le, that the invention can be realised by the formation of a single piece, it requires less number of components, than other similar solutions. Through the pin-like fixing elements fixing of "> ^P'QIN MAALt^ the ribbon cable is slip-proof, outlet of the lead wires coincides with the spacing of the strip used for connec¬ tion of the printed circuit plates, the wiring cas. be me¬ chanically carried out with conventional method without interruption of the wiring process. The connecting assembly unit as fixing, device relieves the electric lead wires, their soldering spots and soldered guide foils of the printed circuits. Figure 10 shows a suitable arrangement of the e - bodiment, whereby the. time of connection is considerably recuced, because the coupling assembly realised with the invention includes the ribbon cable 9 and connecting circuit plate 4, which can be placed into the main coupling 1 of the assembly with a simple movement, furthermore the con- ventional flexible snap-lug 6 is applicable on the connectin assembly unit realising the invention, whicn is connected with cavity 7 of the main coupling strip. BADORIGINAL - f EΛT

Claims: ' .THAT Vi'Ξ CLAIM IS 1. Anti-slip fixing device in connecting as.^embly units for fixing ribbon-type strap, particularly the end piece of ribbon cable, forming the multitude of concentric circles 5 as orthogonal trajectories, which device consists of two flanged (5a, 5b) or flat (5c, 5d) half pieces, or variations cf the pair of half pieces (61-66), circular or elliptic cross sectional fixing pins (8), or fixing holes (10), some kind of conventional fastening elements (11) holding the two half 10 pieces together, and bored blocks, or holes (11a) formed for mlz purpose, and rigid of flexible fixing elements (όe, 5b), c a r a c t e r i z e d i n that each of the two half .. _. — ^. —■ _; ..—,... —. --.-■_.-_..— _ %-.-_.----.._. C-. u_.u — _-_._.l- Q _r r. — ~ϊ 1 >-J - , Uα. — -.-. _. ι-_ ^_- -_, ___--. f z2) are iu -ne c*i.;r.cer ope s f " piece lif ed to z e pl^ eas " -^ , t - <-_ T- '« ,-» - ■ . **■ — ! -» Λ il ^Λ - l^α " ! * « * i Δ Λ rs "^ i V" ' •" n " " -^ T* f nl) P- V > c " * -^ *τ- '' ■ ^ " *" 3 > ~ ϊ •*■ ■ c ^ o *** •--- • " *^ 1 " * *-* ■ * ^ *^ » - * ■ -? - , - -^ £j .- ■'• ■ * ■ 0 - ' ^e "^ " " ^ -**-* 3 s c ^ Ξ TΓ "^ o .i -. Q 0 t .riβ IH iif i ce o ^ir in^r c-i∑is f b*- j ^ Θ in ^ .e .f is n Θ d ■ o; are a ong 0 -Lane o: CO ' ;ιece: .-—wteG oO 6cC._ O J-.8-. .red holes cl _ c _ _ . " ! <_: ■- _-_ r r" or-;-, 'nai f n . a Λ s *1 - f. " ; *c (66) formed from the plane of the other half piece. 2. A suitable embodiment of tne device as claimed in claim 1, c h a r a c t e r i z e d i n tnat the fixin; 5 chamber (1C, ICa, ICb) is a cavity (10) with flange (5a, 5b) protruding from the plane, or the cavity is recessed into the plane (5d) . BAD OFUGi ' NAW _ * ι ? 3- Umbodirient of the device as claimed in claim 1, v; ich consists suitable of two half pieces, some kind of conventional fastening element holding the half pieces together, furthermore ribbon or strap not subject of this invention, c h a r a c t e r i s e d i n that projec¬ tions of the pins according to the longitudinal axis -in respect of their perpendicular projections to the plane parallel with the plane containing the longitudinal axes - are free from penetration, and axes ' of the pins of the two half pieces are either in the same plane r z_>) or in several planes, where distance of the planes or distance of the perpendicular axes from each other and/or from ;άe flanges is greater than the -diameter •'51, o2. 3, £<• ' -; of the average pin dimension, furthermore the projections cf .ins and cavities of the fixing Dinned half niece and • «ι ιece lormec . v i — i i ;:.e ---.0ng2.7ua ~ .na. axes, co e cn S≤ cable - nor being sub r-_._--_ _... i SU . .or. - ;r.arac:e- :iiv.ι. .-- .he rounding radius ( ) of the fixing pins • c) . edge cf the cylinder jacket and its flat surface is smaller than 0 * 1 mm, furthermore height of the fixing pins CS) and flange '5a, 5') conforms to the mechanical parameters of the ribbon ( 3) . furthermore sum of the pinfs) diameters C5) is greater than 1/Sth of the ribbon (3) v/idth, but less than idth of the ribbon. BAD ORIGINAL j

Inventors: DOZSA L, PELENCEI J, SOMODI G
Applicants: DOZSA L, PELENCEI J, SOMODI G, TELEFONGYAR
Application year: 1981
Main classification: H01B7
IPC codes: H01R12, H01R13, H05K7