DE10205818B4 - Housing for an electrical device - Google Patents

Abstract

Housing for an electrical device, with
- One in the housing (1) can be arranged electronic circuit on a circuit board (5) and with
- One on the housing (1) attachable connection device for the power supply of the device and / or the signal transmission to the electronic circuit, characterized in that
- A pre-assembly, consisting of a connector strip (4,5,6) and a metallic housing part (2), is formed, wherein the connector strip (4,5,6) has a plastic housing (4) and
- Formations (8) are provided on the plastic housing (4), with which the connector strip (4,5,6) in the pre-assembly via an adhesive or a potting compound (9) in corresponding formations (3) of the metallic housing part (2) under training the pre-assembly is attached, and
- Wherein metallic connection elements (5,6) of the plug strip (4, 5, 6) contained in the pre-assembly of the outer contacts (5) are guided inwardly for contacting printed conductors of a printed circuit board (10) for subsequent final assembly.

Description

State of the art

The invention relates to a housing for an electrical device, in particular an electronic control or regulating device for an electromechanical arrangement, according to the preamble of the main claim.

It is already out of the DE-OS 39 37 190 an electrical device is known in which the electronic control unit for components of an internal combustion engine is arranged in a housing which is mounted in the region of the motor units. The two-part housing made of metal can be closed electromagnetically shielded, wherein in the housing a connection device for connecting cables is integrated via which the power supply and the transmission of measurement and control signals is possible.

In such housings for an electrical device, in particular for controlling electromechanical arrangements, for example in the motor vehicle, the housing parts are, however, very often made of plastic for manufacturing reasons. In particular, there are so-called pre-assembly, for example, for airbag control units in motor vehicles, usually already from a complex designed plastic component, which are connected to a connector strip by encapsulation.

When using complete plastic housings in the usual way, however, a number of restrictions must be taken into account, in particular the lack of EMC protection (EMC = electromagnetic compatibility), the limited mechanical strength, an unsatisfactory mechanical transmission behavior and a limited existing kick protection affect.

The publication DE19755767 A1 a device comprising a metallic housing part, a connector strip, a printed circuit board and a potting compound. Using the potting compound is a solid composite assembly comprising the metallic housing part, which is introduced in the housing part via a latching closure introduced and held connector strip and the soldered to the connector pins of the connector strip board and a lid.

The publication DE4229727 A1 shows an electrical device comprising a housing, a printed circuit board carrying an electronic circuit, and a power strip. The connector strip is inserted into an opening of the housing and connected to the inside of the housing to the circuit board.

The publication DE19621501 A1 discloses a housing with a recess. In the recess, a device plug is sealingly fixed by means of a clamping ring.

Advantages of the invention

The housing described in the introduction with a printed circuit board which can be arranged in the housing and a connection device which can be fastened to the housing is further developed according to the invention with the further features of claim 1. Advantageously, according to the invention, a pre-assembly, consisting of a connector strip and a metallic housing part formed. Here, the connector strip has a plastic housing and metallic connection elements are guided by the outer contacts inwardly for contacting printed conductors of a printed circuit board. On the plastic housing moldings are provided in an advantageous manner, with which the connector strip can be fitted in corresponding formations of the metallic housing part during pre-assembly.

In this case, the power strip is mounted in the pre-assembly in a simple manner via an adhesive or a potting compound in the metallic housing, wherein a plurality of power strips can be arranged in the housing.

In an advantageous embodiment of the invention, the metallic connection elements are designed as Einpastepins inside the housing, which are feasible at least during the pressing of the pins into corresponding holes of the circuit board during the final assembly of a press tool or a potting compound, which are introduced during pre-assembly , On the other hand, the metallic connection elements can be embodied in the interior of the housing in a simple manner as soldering pins, which can be soldered to the conductor tracks of the printed circuit board.

In summary, the final assembly preassembly assembly of the invention provides a number of advantages during the joining process in a metallic housing, in particular the good EMC protection and the high mechanical strength of the metallic housing can be used. Furthermore, this housing allows a problem-free mechanical transmission behavior and a good kick protection. The design of the connector strip with a plastic housing ensures a high degree of design freedom and a simple tolerance compensation in the final assembly, with a multi-connector strip arrangements with great design freedom is possible.

list of figures

• 1 eine schematische Ansicht eines metallischen Gehäuseteils mit einem mit Kunststoff umspritzen Steckerteil als Anschlussvorrichtung und mit Anschlusselementen für eine Einpresstechnik beim Kontaktieren einer Leiterplatte und
• 2 eine schematische Ansicht des Gehäuses nach 1 mit einer Leiterplatte und dem zweiten aufgesetzten metallischen Gehäuseteil.

An embodiment of a housing for an electrical device will be explained with reference to the drawing. Show it:

• 1 a schematic view of a metallic housing part with a plastic encapsulated plug part as a connection device and with connection elements for a press-fitting when contacting a circuit board and
• 2 a schematic view of the housing after 1 with a printed circuit board and the second attached metallic housing part.

Description of the embodiment

In 1 is a housing for an electrical control unit 1 shown, that an upper not visible here housing part and a lower housing part 2 , For example, made of cast aluminum, has. On the device 1 and thus also on the lower housing part 2 can in a corresponding shape 3 a connection device with at least one connector strip in a plastic housing 4 be added, which plug contacts 5 for the power supply or for contacting signal lines for the control unit has.

The plug contacts 5 are components of metallic connection elements inside the housing, for example as press-fit pins 6 are executed, which are pressed into corresponding holes of a circuit board and to a lost press tool or a potting compound 7 can be performed. The metallic connection elements may alternatively be embodied inside the housing as soldering pins, which can be soldered to the conductor tracks of the printed circuit board.

The plastic housing 4 the connector strip is with formations 8th provided over which they have a corresponding shape 3 in the metal housing part 2 via an adhesive or a potting compound 9 are glued.

Out 2 is a view of the housing for the device 1 or the housing part 2 after 1 removable, in which a circuit board 10 attached is the electronic circuit for the electrical control unit 1 in the housing. The fully assembled electrical circuit board 10 can be here in the final assembly by selective soldering or pressing in with the connector pins 6 electrically connected, and then a lid as a second housing part 11 placed.

Claims (6)

Housing for an electrical device, comprising - in the housing (1) can be arranged electronic circuit on a printed circuit board (5) and with - on the housing (1) attachable connection device for the power supply of the device and / or the signal transmission to the electronic circuit, characterized characterized in that - a preassembly assembly consisting of a connector strip (4, 5, 6) and a metallic housing part (2) is formed, wherein the connector strip (4, 5, 6) has a plastic housing (4) and - on the plastic housing ( 4) formations (8) are present, with which the connector strip (4,5,6) in the pre-assembly via an adhesive or a potting compound (9) in corresponding formations (3) of the metallic housing part (2) is attached to form the preassembly assembly , and - wherein metallic connection elements (5,6) of the plug strip (4, 5, 6) contained in the preassembly group of the outer contacts (5) inwardly for contacting Leiterb guessed a circuit board (10) are guided for subsequent final assembly. Housing according to one of the preceding claims, characterized in that - a plurality of connector strips (4,5,6) in the housing (1) can be fitted and fastened. Housing according to one of the preceding claims, characterized in that - the metallic connection elements (5,6) in the interior of the housing (1) as Einpastepins (6) are executed, at least during the pressing of the pins (6) into corresponding holes of the circuit board (10) during final assembly of a press tool or a potting compound (7), which are introduced during the pre-assembly, are feasible. Housing after one of Claims 1 or 2 , characterized in that - the metallic connection elements (5,6) in the interior of the housing (1) are designed as soldering pins, which are soldered to the conductor tracks of the printed circuit board (10) during final assembly. Housing according to one of the preceding claims, characterized in that - the electrical device (1) is a control and / or regulating arrangement for an electromechanical component in a motor vehicle. Method for producing a housing according to one of the preceding claims, characterized in that - during the pre-assembly, the connector strip (4,5,6) and the metallic housing part (2) are joined together by an adhesive or a potting compound (9) on the plastic housing (4) the Plug connector (4, 5, 6) existing formations (8) in corresponding formations (3) of the metallic housing part (2) are fixed, and during the subsequent final assembly further housing parts (11) and at least one circuit board (10) to the device (1 ).

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