DE2353283A1 - ANTENNA FITTED IN THE AREA OF THE WINDSHIELD OF A MOTOR VEHICLE AND METHOD OF MANUFACTURING IT - Google Patents

Description

PATENT LAWYERS

Dipi.-ing. H. Seiler Dipi.-ing. J. Pfenning Dipi.-Phya. K. H, Möinig

1 Berlin 19

Oldenburgalle © 10 Te), 03O / 3Ö4 5

Wireword: S.eilwehr patent

Postal checking account: Berlin-West 59 38-102

October 22, 1973 Me / Sf

. LIBBEIi -OWENS-FORD COMPANY- '■ 811 Madison Avenue, Toledo, Ohio, USA

Mounted in the area of the windshield of a motor vehicle Antenna and method of making it ■

The invention relates generally to layer- Safety glass units in the form of windshields, in the radio antenna assemblies are introduced, and in particular on improvements in the connection between the antenna and thus the windshields and their dissipation within of the motor vehicle * '>

The more recently introduced into the windscreen or generally windshields of motor vehicles antennas "already enjoy a widespread and set in their present structure form long ceased ι disorder with respect to viewing or -dergleichen more is where they have found a preferred Anwendungsfeldj especially in sports cars »The shape of the antenna can be different -) -

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be nicest; however, it has proven to be particularly beneficial insert two thin wires in opposite directions in the shape of an upside-down "L" into the disk unit.

There is a difficulty that has arisen in this connection especially in the satisfactory electrical connection between the antenna inside the windshield and the car radio, which should be achieved with as little effort as possible and with simple means.

According to the invention, a complete "inside" a windshield proposed antenna structure proposed, which is technically and economically acceptable for the automotive industry as well as for the customer base, and which at the same time is characterized by the Ease of installation is advantageous.

The invention is based, inter alia, on the essential object of providing an antenna structure of the type mentioned above that can be done quickly and with minimal cost can be realized in a simple way. It is also an object of the present invention to design the antenna so that it works satisfactorily and is simple in one Motor vehicle can be assembled, in particular the electrical

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2353283 The problem on which the invention is based is provided by i Fig. Invention. It means: features cited in the claims solved. The enclosed i 1 shows a perspective partial representation of a car ¹ s see -
Connection 'to the car radio can thereby be improved The following drawings show, for example, embodiments in front view, with one in the front window target that it can be realized more easily and lastingly the Car antenna is installed, remains functional than the previously known connection Fig. 2 is a partial perspective, broken representation of the - connections was the case. . Fig. antenna connection designed according to the invention the between the antenna structure within the windbreak the Fig. disk according to Fig. 1 and the connection cable for the Car radio, 3 is an enlarged partial view of one end of the Ver binding element according to Fig. 2, 4 a .Teilschnitt along the line 4-, 4 of Fig. I ^ 409819/0790 _; ~ ⁴ ~

_ Fig. 5 . '- .. ■' ■ "2353283 Fig. a partial cross-section along line 5-5 of FIG - 6th Fig. 2, Fig. a broken rendition of the top view of a Area of a plastic intermediate layer in the area of the Terminal ends, iri which the antenna wires parallel to 7th lie to each other, ~ a representation corresponding to Fig. 6 after application of the connection element between the antenna shown wire sections,

8 shows a representation corresponding to FIGS. 6 and 7 after the free ends of the antenna wires have been wrapped around the connector,

FIG. 9 shows a corresponding illustration in turn to illustrate the soldering process between the intersection point of the Antenna wires and antenna lead,

10 shows a diagram according to FIG. 8, in which the connecting element has a slightly modified shape,

11 is a vertical section along the line 11-11 of Fig. 10, and '

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FIG. 12 essentially corresponds to FIGS. 8 and IQ

for a modified embodiment.

In the present invention, one is layered Safety glass, in the form of a windshield, assumed the layering alternately 'from panes of glass and this interconnecting plastic interlayer consists of and wherein one of the disks receives the antenna structure, which consists essentially of horizontally arranged wire sections, which are at a distance from each other ,, and. is composed of parallel, vertical wire sections. Such an antenna structure is characterized according to the invention by a connecting element in the form of a contact strip, the one over the two at a distance from each other vertical wire sections, in their end regions, with these standing in electrical contact ,, is located, the free wire ends around this connecting element after laying όθεν ~

the same are looped around. - ...

According to the invention there is also a method for production proposed such antenna structures, which is characterized in that the antenna wire on one of the Layers of safety glass applied, with its running Wire ends, immediately adjacent to the lower one Edge area of the windshield, with a metallic

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Facing strip is brought into electrical contact, which is laid over the two wire ends of the antenna, ' that the connecting strip with the surface of the disc and so that the wires are connected, and that the free ends of the antenna wire bent around the connecting element will.

Fig. 1 of the drawings shows a complete in the front window a car's introduced antenna 10, which is in the Layer structure of the safety glass 12 is integrated. the Antenna 13 is via the in -Fig. 2 connecting element shown connected to the car radio of the car 11.

As shown in detail in FIGS. 2, 4 and 5, the windshield 12 is composed of two panes of glass 14 and 15, the with each other over the intermediate plastic layer 16 are connected, such a layer structure through the application of heat and pressure in a known { Way is producible. In the area of the lower edge of the ver The glass pane has glazing in its central area 15 shows a detail 17 - like that from FIGS. 2 and 5 is recognizable.

ί Section 13 of antenna 10 is between the two layers of glass, the windshield 12 inserted, and it consists initially of the two thin wire elements 18 and 19, the

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preferably lie horizontally, as well as the vertical wire. sections. 20 and 21. The horizontal wire elements lie - as can be seen - near the upper edge area the windshield 12 at a distance of approx. 3 to 5 cm, where they are outside the critical field of vision of the glass unit are located. Correspondingly, if a shading band or a corresponding sun protection is in the This part is present in the upper area of the windshield completely covered by the antenna. .

The two vertically extending antenna sections 20 and 21, which in the exemplary embodiment are about 1.2 cm apart lie, reach through the middle of the target unit ' between the driver of the vehicle and his passenger, so that they too are outside the critical field of vision of both Vehicle occupants lie. Starting from these two vertical antenna sections, the connection is then also established produced for the car radio, which represents an essential aspect of the present application.

As can be seen in particular from FIGS. 2 and 4 to 9, run the vertical wire sections 20 and 21 from the inner ends of the horizontal wire members 18 and 19 from in Downwards towards the lower edge of the glazing unit . and in this context it is also particularly important to F.ig ". ■ 2, 5 and 7 to 9 referenced. This likewise between

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Sections embedded in the layer structure extend into the cutout 17 of the glass layer 15 or beyond this and are overlapped here by a metallic connecting element in the form of a contact strip 24 or the like and electrically connected. The free, below the connecting sstreifens ends of the antenna wire are _v cross-like bent in the manner shown in Fig. 2 way over the upper surface of the connecting element away and soldered here at the crossing point or otherwise permanently connected to the antenna feed.

In this context it should be emphasized that the The present invention does not refer to a special procedure for the production of antennas introduced into windshields or is directed to a corresponding antenna structure, ■ but rather to a secure and improved connection the same with a suitable connecting element. 24. This is hexed on or into the plastic intermediate layer of the glazing unit brought, i.e. the layer 16 in the execution

. be

for example, this is acted upon with the second glass layer will. In terms of procedure, this can be done, for example. be that first an embedding of the wire sections Antenna 13 under the application of heat and pressure in the Plastic intermediate layer is made previously on that of the vehicle seen from outer glass pane 15 has been applied,

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where 'the lower'. wire ends free from this layer in the protrude from the form shown in FIG. 6. Now the Verb in dung sstreif eä 24 placed, for example a may be thin copper strips or a steel band, preferably for example in the form of a finger bone in relation to it Circumferential edge .und symmetrically over the wire elements 20 and 21 arranged. This strip is applied by Heat application or some other binding possibility in the area of the middle section of the same, i.e. between the wires, so that here a permanent connection with the plastic disc according to FIG. 7 is ensured.

The shape and details of the connecting strip 24 are shown in detail in FIGS separated by semicircular constrictions 28, each followed by a basically semicircular end section 26, the semicircular recesses 28 defining a waist-like constriction 27. The middle section 25 is introduced into the plastic layer by applying heat and is permanently connected to it, whereby in the exemplary embodiment a pressure of approx. 13.6 kg and a temperature of approx. 149 ° G for approx . is expended. . '",.

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The loose ends, i.e. the downward protruding free wire sections, for example of the wire 21, are then turned off Fig. 8 shown way bent back upwards, whereby they from the one circular arc-shaped recess 28 at the bottom across the connecting strip 24 or its central part 25 obliquely lead up to the diametrically opposite upper cutout on the other side of the strip. From there it will be they are initially guided downwards again on the rear side of the connecting strip or correspondingly bent, as shown in broken lines in Fig. 8, or there is a bending clamp, such as Fig. 7 shows ^ whereupon the excess length of the Wire section is cut off, for example by a correspondingly sharp blow against the lower edge the glazing unit in the area of the arcuate recess of the connecting strip. Below is the same bending manipulation made with the free end of the other wire 20, so that finally the wires in a crosswise arrangement, as can be seen from Fig. 8, are intertwined with each other and their ends behind the strips, as indicated in the dashed lines, are anchored.

The plastic intermediate layer 16 with the antenna arrangement and the connecting and connecting element, which is now a

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. . .— ii— ■. '. ■' ■ - ■. ■■

; forms a solid unit with this, is then applied to two panes of glass 15 and 14, whereby care is taken that the connecting and connecting strip 24 is suitably positioned within the recess 17 of the: outer pane of glass 15 (see FIGS 9) lies. Exposed to the resulting glazing unit wiiid below a conventional _v pressurization, commonly carried out by means of zendruck whale is, the increased to about 65.6 C, first at room temperature and subsequently at temperature. This is followed by a locally limited pressure on the entire area of the connecting strip 24 and against the sections of the intermediate layer 16 and the areas of the glass pane 14 aligned therewith, while the arrangement is still at the temperature of the pre-pressing treatment. Such a procedure, which can be carried out for example by using air as an aid, a Gimani sponge or the like, and clamps arranged opposite, must ensure that the entire area of the connecting strip 24 forms a tight and firm bond with the plastic intermediate layer 16 before the final broom treatment the disk unit is carried out in an oil autoclave.

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Either before or after the autoclave treatment, a suitable line end or a wire section 30 (see FIG. 9), for example a tin-plated copper wire that is sufficiently insulated, is soldered to the intersection of the wires 20 and 21 or is otherwise permanent connected to the connecting strip 24. In the exemplary embodiment, a soldering iron 31 is used in the manner shown in FIG. 9. The solder used here is an alloy of 0.75. % Tin, "97.5 % lead, 1.75 % silver and a suitable flux such as the tradename" Kester 1544 "flux from the Kester Solder Company, Division of" Litton Industries, Chicago, ". Illinois, USA, which is used at temperatures from 482 to 538 C, j

The final step in the procedure is to fill it out the recess 17 in the one glass layer, i.e. in the Coating and covering the connecting element and the adjoining wire parts with a heat and moisture resistant Plastic material 32, such as the plastic known under the trade name "Thiokol" (see also Fig. 5). The window unit with antenna and antenna connection is now ready and can be used within the motor vehicle in Positioned and fixed in a known manner. Furthermore, if the lead wire 30 is connected to a suitable one electrical connection is provided, such as a plug contact 33, then the connection of the antenna to the Aptoradio

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in the simplest way by plugging in a corresponding one Connector possible.

Instead of the preferred embodiment described above for * - game for the shaping of a connecting and connecting strip 24, it is of course also possible to use other suitable shapes. So can for example, the middle and the end sections of the connecting element in a different way than over the tapering one Section 27 are in communication with each other. FIG. 10 shows, for example, a modified further preferred one Embodiment of a connecting and connecting strip 34, which - as shown - is provided with a tongue downwards in its central area, otherwise it tapers there.

The middle section 35 of the strip, which in turn forms a part with the end sections 36, shows semicircular cutouts 38 and 39 at the transition points 37 along its upper edge and is in this respect comparable with the first-described embodiment. Between the two lower, obliquely inwardly extending cutouts 39 j lies a downwardly projecting ζ *% β 40, which can be bent out of the plane of the drawing, as _{is indicated in the cross section in FIG. 0} 11 = '. -

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The procedure for securing and sealing the strip 34 in and on the plastic interlayer 16 'which serves as an intermediate layer for a layered glass arrangement is comparable to that described above. The one from the strip downward protruding free wire ends of the antenna are after application and attachment of the connecting strip also above it, again vertically at a distance parallel to each other, which in Fig. 10 by the wire parts 20 and 21 ' is indicated.

When using the strip 34, however, the procedure is as follows _:

that instead of the first fastening of the middle-j ren section and the subsequent definition of the end sections here the entire strip with the exception of that according to I. outwardly bent section firmly in the plastic layer; lays or is poured into this »which in turn is indicated by j Heat and pressure are applied as soon as the wire

! Sections 20 'and 21 * are located in the area of interest. Immediately after the connection strip has been fixed (see FIGS. 10 and 11), the uncovered, free ends of one wire and then the other wire section 20 ^r , 21 'are bent over in the manner shown and wrapped around the parking tongue 40 and then cut off the excess wire.

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With such a connection, intersections between the wires are superfluous, a permanent connection on the contrary, it is ensured solely by the winding process and an antenna conductor wire can now be attached to the. wrapped part of the wire sections 20 'and 21' are soldered, making them simultaneously through only a single Soldering process with the strip 34 are electrically permanently contacted. '. ·

Another desirable modified embodiment

game is shown in Fig. 12, in which with respect to the connecting element 44 of one as in the first Embodiment shaped strip 24 (see FIGS. 2 to 9) 1 The starting point is a corresponding middle section 45 and the two end sections 46, which are connected to one another via the constriction point 47. One such strip is again brought into position on the plastic layer 16 '', so that it overlaps the two antenna wires 20 'and 21', which in this case lie below the strip 24 in the region of the semicircular recesses. The difference to the first Embodiment is that instead of the initial attachment or a corresponding potting only of the rectangular central portion 45 between the two wires 20 '· and 21' · the portion of the strip 44 which is initially is connected to the plastic layer 16 '' by the application of heat, now in the manner of gluing or

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such firm adhesion is attached that this area corresponds to the dashed lines at 48, or. that this line marking marks the end of the portion of the strip 44 firmly connected to the plastic layer. As can be seen, this results in extended adhesion areas 49 and 50 compared to the initial exemplary embodiment, which hold the wires 20 'and 21 "between the strip 44 and the plastic layer 16" over this length. For example, below the free end of the wire 20 ', as can be seen in interrupted forming lines to itself, approximately U-shaped, bent back parallel and thereby wrapped around the enlarged portion 49 of FIG _o 12, and then in the semi-circular cutout in turn diagonally across the Middle section to be bent obliquely downwards, up to the diagonally opposite lower semicircular cutout in the strip 45 and from there behind the connecting strip, ie between the same and the plastic layer, back upwards. The second free end of the other wire 21 ″ is looped around the connecting strip in the same way, coming from the opposite side, ie starting from the extended binding area 50 in a U-shape upwards through the associated semicircular recess across the middle area and downwards towards the diametrically opposite recess, from there behind the ^; strip upwards again, whereby the then superfluous wire.

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end is cut off in the semicircular cutout lying there. The completion of the antenna connection is then brought about again by a soldering process, the soldering point being the intersection of the. Wires 20 ″, 21 ″ represents, as has already been described in connection with the connecting and connecting strip 24.

It is of course possible to use the exemplary embodiments shown to be modified accordingly within the scope of the invention, for example the recesses 28 can only along the lower edge of the strip 24 or 44, and deeper cutouts than those shown to get voted. This can have the advantage, for example, that the wires must first be bent over in a clear manner Way can be carried out from the lower edge of the connecting element, and that furthermore in this case the Connection strip shows capacitively more favorable values.

Such formed strips 34, -the then wider Section 27 or 47. A more stable attachment of the antenna sections can cause, depending on the application, result in also more favorable conditions in the soldering properties, and they finally show an increased resistance to tensile stress or the like of the antenna lead-off wires.

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Claims (1)

-18 PATENT CLAIMS 1.) Safety glass for windshields of motor vehicles or the like, consisting of a multilayer glass pane arrangement and at least one plastic intermediate layer connecting these with one another with an integrated radio antenna, which is divided into horizontally arranged wire elements and vertical wire sections lying parallel to one another, which run in the downward direction from the former characterized in that an elongated connecting strip in the form of a connecting element (24, 34), standing in electrical contact with the spaced-apart vertical wire sections (20, 21), is laid across them, and that the free, lower ends of these wire sections around the connecting strips are wrapped around or folded over accordingly. 2. Apparatus according to claim 1, characterized in that the wire ends which are wrapped around the connecting strip (24,34) are placed over its surface, with one another and in contact with it. j 3. Apparatus according to claim 2, characterized in that a feed wire (30) electrically connected to the -19 -4098 19/079 0 the wire ends of the vertical wire sections (20, 21) and also with the surface of the connecting strip (24, 34) in the area where the wires connect are in contact, connected. 4. Apparatus according to claim 1, characterized in that ! the connecting element or the connecting strip ■ (24, 34) from a middle. Section (25 or 35) and End sections (26 or 36), as well as these unifying Areas (27, 37) composed, each of the free j i Wire ends of the radio antenna between the end sections · j and the middle section in both connecting areas (27, 37) is turned over. 5. Apparatus according to claim 4, characterized in that the antenna structure (13), carried by the plastic intermediate layer (16), applied to this and / or in a Surface of the same is embedded that the connecting strip (24, 34) at least in a partial area with the intermediate disk is connected, which lies between the vertically extending wire elements (20, 21) that each the folded wire ends first below the unifying areas "(27, 37, 47), adjacent to the End portions (26, 36, 46) of the connecting strips (24, 34, 44), is passed, then after folding around the. respective edge area across the surface of the 409819/0790. -20 INSPECTED • -20- · Strip runs and finally above and behind the opposite, connecting area (27, 37, 47), is guided diametrically opposite the first-mentioned folding point in order to be cut off at this edge, and that a lead wire (30) electrically connected to the folded wire sections and the surface of the connecting strip connected is. 6. Apparatus according to claim 1, characterized in that the · from a surface in the plastic washer (16) recorded antenna structure (13) with its connection strip (34) is bound to this intermediate layer, wherein the vertijcal extending wire elements (2O ₅ 21) are between these that the connecting strip (34). a section (40) which is angled between its end 'sections (36) in the outward direction, and that each of the folded wire sections first passed below the strip, adjacent to its end regions, and then around the section (40 ) is wrapped around. 7. Apparatus according to claim 1, characterized in that the connecting strip (44) with the plastic intermediate layer (16) is connected in an area that is in the ■ mainly due to the vertical wire elements 409819/079 0 -21- -21-. ■ " • limited, with on both sides -part areas (49, 50) protrude as adhesive sections beyond this central area, that the wires "in the form of a loop (see Fig, 12) are led out to these extended adhesive sections behind the connecting strip (44) and that the free s out strip (44, / and across the surface of | wire ends to r ³ -en associated edge region of the connecting lying around
are. 8. Apparatus according to claim 7, characterized in that each of the vertically lying wire sections is a loop forms between the connecting strip and the disc, and that each free end of the wire from the loop above a top cutout (28) diagonally in a downward direction across the outer surface and then in an upward direction is guided behind the connecting tire (44). Process for the production of an antenna structure introduced into the windshield of a motor vehicle, wherein the windshield consists of a layered glass arrangement with an intermediate, connecting them Consists of a plastic layer, and the radio antenna has parallel, vertically running wire sections at a distance, which are received by one of the discs, characterized in that the application of the 40981370790 · "'" Amtennen on a pane or the intermediate layer is carried out in such a way that that the ends of the vertically lying wire sections do not adjoin the "lower" edge Adhere to the area that a terminal I overlapping and electrically connecting the vertical wire sections I rub with the surface of the disc and. with the I Wires is brought into permanent permanent contact, and 'That the loose ends of the wires are wrapped around the strip will. ! . 10. The method according to claim "9, characterized in that ■ - ■ i the excess wire ends by cutting along; i removed the edge of the strip. ! ■ I ■ · 11. The method according to claim 9, characterized in that '■. the free wire ends around the connecting strip, adjoin- i y y j foreign to an end portion around the edge in the area of a j Cutout (28), are laid around so that they are then transversely j I run over the surface and over and behind the Connection strip, adjacent to the opposite one End section in the area of the diametrically opposite cutout (28) are folded over. 12. The method according to claim 11, characterized in that the carrier disk for the antenna structure is the plastic 4 0 9 819/0790 " ²³ ~ disk, and that the antenna is embedded in the surface of the same that that portion of the Connecting strip, which between the parallel angej arranged wires is connected to the plastic disc by applying heat before the wires are turned over. · Be hit, and "that the end sections of the connection training strip by applying heat subsequently with firmly connected to the plastic layer or partially pressed into it. 13. ■ The method according to claim 9, characterized in that the contact element or the connecting strip is an elongated one Is a metal strip that has a portion that is angled outward and that between the end sections and that the entire connecting strip, apart from the one pointing in the outward direction ■ Section, which is firmly connected to the plastic layer by applying heat before the wires around it wrapped around the wire parts, starting from the lower area of the strip, around the outward portion so that they are brought into connection with each other at the same time. -24-409819 / 0790 14. The method according to claim 9, characterized in that after loop-like wire guide its ends so be continued so that they cross on the surface of the connecting strip and a feed wire is soldered onto the wires at the crossing point by means of high-temperature soldering. 15. The method according to claim 9, characterized in that the loop ends of the wires between the connecting strip and the surface of the supporting plastic between J. layer before wrapping the wire around the connector strip. Seiler, Pfenning, Meinig 0Ί-9.0 Empty bar