WO2014005571A2

WO2014005571A2 - Electric component support for a motor vehicle and production thereof

Info

Publication number: WO2014005571A2
Application number: PCT/DE2013/000363
Authority: WO
Inventors: Ulrich Weichsel; Andreas Ziganki
Original assignee: Kiekert Aktiengesellschaft
Priority date: 2012-07-05
Filing date: 2013-07-04
Publication date: 2014-01-09
Also published as: DE102012211756A1; WO2014005571A3

Abstract

The invention relates to an electric component support, in particular, for a motor vehicle, comprising conductor paths which are embedded in an electrically insulating material, and electric connections and a production method. The invention also relates to an electric component support with a base part made of an electrically insulating material and electric conductor paths for connecting to electric components. Said conductor paths are completely surrounded by the material of the base part. Completely surrounded means that the electrically insulating material surrounds 100% of the conductor paths. Said conductor paths are then not accessible from the outside and are completely protected by the material of the base part.

Description

Electric component carrier for a motor vehicle together with production

The invention relates to an electrical component carrier in particular for a motor vehicle with an embedded in an electrically insulating material ebetteten interconnects and electrical connections and a manufacturing method.

A Elektrokom ponententräger is a self-supporting component with a housing and inserted into the housing electrical conductor tracks that have been punched out of a sheet metal green. The material of the conductor tracks is so thick and therefore stable that conductor ends can serve as contact pins. In addition, the material is basically flexible, so that conductor track ends can be bent in order to make contact in a desired direction. In principle, the conductor tracks are made of metal and are in particular 0, 1 mm to 1 mm thick.

To the electrical connections of such a track unit, electrical components are connected, such as switches, detectors, electronic components or electric motors. Such electrical components can be found for example in a lock, in particular door lock of a motor vehicle. A lock for motor vehicles in the sense of the present invention basically comprises a rotary latch and at least one pawl with which a rotation of the rotary latch in the opening direction can be blocked. For a production, for example, first printed conductors are punched out of a m sheet metal and, if necessary, prepared by bending for pielsweise for the provision of contact lugs and / or drilling erg complementary. The thus prepared ladder frames, which are not may have supportive and / or connecting webs are then inserted into a housing of the electrical component carrier. Subsequently, insulating material is injected into a first step in order to fix the conductor tracks in the housing. This step is called pre-spraying. Then connecting and / or supporting webs - if present - are separated between the tracks. Finally, the housing is filled by injecting insulating material in the intended manner in order to protect the interconnects from disadvantageous external influences and / or to form, for example, a housing part of the lock.

Tabs protrude from the insulating material to contact components such as e.g. to be connected to a switch. The projecting tabs then form the electrical connections of the electrical component carrier.

If now the electrical component carrier to be connected to an electrical or electronic component, so the component is used at the designated location and its electrical contacts with the associated electrical tabs, for example, welded or soldered. For example, a switch is used so that its contacts can be soldered to the above contacts of the conductor tracks. Since the interconnects are punched out first, then as a conductor ends u. a. To be bent up to form tabs, sheet material is needed. The protruding part of contact lugs is not protected by insulating material from environmental influences.

From the document DE 10 2005 049 975 AI an electric component carrier is known which punched from tinplate Includes traces, which are connected to a base member. Conductor ends represent externally accessible electrical contacts. With these, contacts of electrical or electronic components can be connected.

As the document D E 1 0 2005 049 975 A I can be seen, the requirements for an electrical component carrier when used in a motor vehicle are very high. In the case of a motor vehicle, such electronic component carriers are exposed to extreme conditions of vibration, in particular with regard to temperature, atmospheric humidity, soiling and mechanical shocks.

From the German patent application 1 0 201 1 082 1 40.6, which is not previously published, it is known to embed printed conductors in an electrically insulating material. The printed conductors are completely surrounded by electrically insulating material with the exception of electrical connections. The electrical connections are externally accessible so that they can be electrically connected to electrical contacts of electrical or electronic components such as switches, detectors, electronic components, integrated circuit, electronic chip, electronic control or motor, for example by soldering. The printed conductors and electrical connections are different components, which are therefore initially independent of one another and can be produced independently of one another.

From the document DE 1 0 204 355 AI, a control device for a motor vehicle is apparent. The electrical connections between components are provided by a one-layer stamped grid. I n the punched grid are receptacles for pins of components educated. Components are held by their contact pins frictionally in the recordings and electrically contacted.

Unless stated otherwise below, the aforementioned features can be combined individually or in any combination with the subject matter of the invention described below.

It is an object of the invention to provide a further developed Elektrokonnponententräger.

To achieve the object, an electrical component carrier is provided with a base part of electrically insulating material and electrical conductor tracks for connecting electrical components, wherein the conductor tracks are completely enveloped by the material of the base part. Fully enveloped means that the electrically insulating material covers 100% of the tracks. The tracks are then inaccessible from the outside and completely protected by the material of the base part.

Areas of the strip conductors are not unprotected against a base part or are otherwise accessible from the outside and thus exposed to moisture in particular. The printed conductors according to the present invention are particularly well protected against external influences. The conductor tracks can therefore be made of a material which, although less able to withstand environmental influences, but which has other technical advantages. The material for the conductor tracks is therefore more freely selectable compared to the prior art. The interconnects can be made of copper, for example, but also of steel, for example, if a high mechanical stability is required in order to be able to cope particularly well with vibrations and shocks in the automotive sector. Like from the Sta nd the technology already known, tinplate is provided as a material for the conductor tracks in one embodiment. The zinc coating of the steel provides additional protection against corrosion. However, a conductor can also consist, for example, of copper, brass or another copper alloy.

To the leads with electrical Konta kts of electrical Ba share to konta ktieren, for example, Konta ktstifte from the outside at a suitable location in the base part, for example, beaten, thereby the eventual conductor tracks konta in the desired manner konta ktieren. Konta ktstifte are in contrast to the known from DE 1 02 04 355 A I Sta nd the technology green in principle not inserted into already existing recordings. Instead, such recordings are advantageously created only by co-clocking, which reduces the requirements for finished product tolerances and simplifies them with contacts. Basically Konta ktstifte in Sin ne of the present invention are independent components that are not already connected in particular with electrical or electronic components, but only with electrical Konta kten such components are connected, such as cohesive as soldering, by form fit and / or adhesion ,

Material of the base part was displaced by the Eininschlagen, drilling in or piercing. The base material is therefore particularly close to the respective contact pin and that regularly in the pressed state. The printed conductors are therefore particularly well protected against adverse influences such as moisture, in particular when the insulating material presses against the respective contact pin a, for example because of the elastic properties. In one embodiment of the invention, the conductor tracks are provided by a stamped grid. Since no material has to be provided in order to allow outgoing contact lugs from the base part, it is possible to save installation space and material in comparison with the prior art known from DE 10 2005 049 975 A1.

In one embodiment of the invention, the base part comprises channel-like recesses, which lead to conductor track sections, which are provided for a contact. However, between the inner end of such a recess and the conductor remains a layer of electrically insulating material that is able to protect the conductor against environmental influences. If a pin consisting of electrically conductive material is inserted into such a recess and subsequently pushed or screwed further into the base part, then this pin reliably contacts the conductor track in the section provided for this purpose. In the case of an electrical component carrier produced in this way, the material of the base part bears against a punched-in or drilled contact pin only close to the corresponding conductor track, particularly tightly or pressed. In comparison, the area of the base part that comprised the recess is at least less close to the contact pin or there is no tight connection that can protect against the ingress of moisture. It can therefore remain in the region of the recess a gap to the contact pin to use the contact pin without effort in the recess can.

The base part is designed in particular self-supporting. So it is mechanically so stable that it is not able to bend or at least virtually non-destructive. The handling of the electrical component carrier is then particularly simple. In one embodiment of the invention, the base part comprises a self-supporting, usually made of plastic housing in which the conductor tracks are inserted. The inserted conductor tracks are 100% enveloped by finally brought into the housing into it, so for example injected into it material. Preferably, a material has been introduced with elastic properties to allow a particularly good seal against subsequently drilled or knocked into contact pins. The base part consists in particular of one or more plastics.

In one embodiment of the invention, the sections of printed conductors, which serve for the contacting, widened in comparison to other conductor track widths. As a result, tolerances are advantageously reduced, which must be observed for a contact. The production is further simplified. These sections can have an angular, for example rectangular or round shape. Basically, the widened portions have no recesses to get into the pins inside. Such recesses are created only by drilling in or hitting a contact pin.

The invention further relates to a claimed component carrier having externally accessible electrical contacts which have been drilled or pushed through electrically conductive material of the base member such that they have been and are electrically connected to conductor tracks. There is thus an electric component carrier ready, which can be provided with electrical components, to be subsequently used in the desired manner, such as in a motor vehicle such as in a lock of a motor vehicle. The electrical contacts, which are preferably made of a different material than the conductor tracks, preferably have a tapered end, which has been pushed or drilled into a conductor track. The tip facilitates the provision of such contacting.

In one embodiment of the invention, the electrical contacts, which are regularly pin-like, a thread with which the electrical contacts have been screwed into the base part. The contact succeeds so particularly easy and reliable.

In one embodiment of the invention, the electrical contacts on a broadened head, which is able to facilitate electrical contact, which is then also able to shield due to a regularly existing contact pressure.

In one embodiment of the invention, the contact pins protrude differently from the base part in such a way that electrical and / or electronic components can be arranged one above the other as seen from the conductor tracks. The contact pins then generally include a right or acute angle with conductor tracks.

In the case of conductor web ends bent at right angles for the purpose of contacting, for example, the height of a contact is limited by the length of the contact lugs thus provided. For reasons of saving material, the length of the contact lugs is basically limited if the conductor tracks have been produced from a stamped grid. A comparable excessive material consumption is eliminated in the present invention. The invention therefore makes it possible, even in the case of a stamped grid, several electrical or electronic components above one another above the conductor tracks to arrange without having to accept an excessively high material consumption.

The accuracy requirement for the component geometry can also be reduced by the invention. In the case of a curved contact lug, care must be taken to ensure accurate positioning. If a contact pin, for example a screw, is drilled into a conductor track for the purpose of making electrical contact, then it is not necessary to exactly engage the contact pin at a predefined point on the conductor tracks.

In comparison to the prior art with the contact lugs conductor tracks can be contacted at any point, even in the range of partially rising conductor tracks, that is formed conductor tracks.

In one embodiment of the invention, the base element comprises a housing with conductor tracks inserted therein into which electrically insulating material has been injected. In one embodiment, the injection-molded material advantageously provides insertion surfaces or recesses for electrical or electronic components of the electrical component carrier, for example for electrical contacts of a switch, which stabilize the position of the switch. Advantageously, the thickness of the conductor tracks is selected so that one to five, preferably three threaded tracks are present in the track for a trained as a screw pin, which serve the electrical contact. It has been found that one to three threads are sufficient to contact sufficiently reliable electrically even under the difficult conditions of a motor vehicle application. Further increasing the number of threads leads to correspondingly thicker printed conductors. Around If the tracks do not have to be too thick, the number of threads should be limited to a maximum of five, preferably to a maximum of three threads. It suffice 0.3 to 0.8 mm thick strip conductors to allow 1 to 3 threads in a practical way.

In an advantageous embodiment, a contact pin is passed through an electrical contact of an electrical or electronic component in order to advantageously avoid soldering and to accelerate the contacting. The contact pin therefore advantageously has a widened head or region, which is then able to rest on the electrical contact of the electrical or electronic component. The electronic component carrier is in particular part of a lock for a motor vehicle or otherwise part of a motor vehicle.

Regularly, in the case of an electrical component carrier which has been contacted in the intended manner with electrical or electronic components, some of the recesses leading to printed conductors are unused. Because to achieve manufacturing advantages, advantageously more recesses are created than needed for a particular application, so as to allow the use of the electrical component carrier for other applications. The number of parts to be handled is kept so low, which reduces the production costs.

The contact pins are preferably made of a moisture insensitive material. Suitable materials are, for example, copper, a copper alloy, which are in particular silver plated. Show it

1 electrical component carrier with contacted microswitch FIG. 2 section through electrical component carrier

Fig. 3 supervision on Leiterba hnen of the electrical component carrier

In FIG. 1, an electrical component carrier is sketched. As an illustration, a base part 1 with two printed conductors 2 is shown. The ladder rails 2 are located completely in the base part 1. Not so hey areas of the base part 1 are shown in order to make visible the conductor tracks 2 produced from a stamped part. A Konta ktstift 3 with widened head 1 0 (see also Figure 2) is durc h a en tsprechende opening or bore 6 of an electrical hen Konta kts 4 of a microswitch 5 hindurc h stuck, then in a recess shown in section in FIG Hole 7 inserted into the base part and sch lichlich in a Leiterba hn 2 through the material layer 8 shown in Figure 2 in section 8 of the base part 1 through it has been hc. Only the material layer 8 is then close and close to the contact pin 3 a n. The electrical contact 4 of the microsc holder 5 has been connected so advantageous without soldering to the underlying conductor 2.

In the base part 1, a recess is further provided, the microsc holder 5 as dargestel aufzuneh men and hold formschlüssig and / or non-positively.

Figure 2 illustrates that the end 9 of the contact pin 3, which hn 2 has been beaten into the Leiterba pointed to run. The section shown in Figure 3 illustrates that the Leiterba hnen 2 in the region 1 1 of the contact are widened rectangular in order to facilitate a Konta ktierung. Unused recesses 7, which in particular have the shape of a bore, remain advantageously closed to the respective conductor track 2. It can therefore be easily provided a plurality of recesses or holes 7 advantageous, even if only a subset of the holes 7 are used for different applications. It facilitates the production.

LIST OF REFERENCE NUMBERS

base

2 trace

3 contact pin

4 electrical contact of a microswitch

5 microswitches

6 hole in the electrical contact of the microswitch

7 leading to the conductor recess in the base part

8 material layer at the end of the recess

9 pointed end of the contact pin

10: broadened head

Broadened conductor track area for a contact

Claims

claims

1. electrical component carrier having a base part (1) of electrically insulating material and electrical conductor tracks (2) for connecting electrical or electronic components (5), characterized in that the conductor tracks (2) completely enveloped by the material of the base part (1) are.

2. Electro-component carriers according to one of the preceding claims, characterized in that the conductor tracks (2) consist of steel or tinplate.

3. electrical component carriers according to one of the preceding claims, characterized in that the conductor tracks (2) are provided by a stamped grid.

4. Electro-component carriers according to one of the preceding claims, characterized in that in the base part (1) channel-like recesses (7) are present, which lead from the outside to conductor track sections (11).

5. Electro-component carriers according to one of the preceding claims, characterized in that the base part (1) comprises a housing, in which material is brought into it, wherein the introduced material is preferably elastic.

6. electrical component carriers according to one of the preceding claims, characterized in that the conductor tracks (2) widened portions (11) for contacting with contact pins (3).

7. An electrical component carrier provided with an electrical component carrier according to one of the preceding claims, characterized by externally accessible Contact pins (3), which are drilled into the outer tracks (2) from the outside, pierced or knocked into it.

Electro-component carriers according to the preceding claim, characterized in that the end (9) of a contact pin (11) located in the base part (1) tapers to a point.

Electro-component carriers according to one of the two preceding claims, characterized in that the contact pins (3) protrude differently far from the base part (1) and enclose a right or acute angle with conductor tracks (2).

Method for producing an electrical component carrier by electrically connecting in an electrical component carrier with the features according to one of claims 1 to 6 contact pins (3) through material (8) of the base part to printed conductors (2).