Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Reexamination Certificate
1995-11-03
2001-05-15
Gandhi, Jayprakash N. (Department: 2844)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
C361S803000, C439S076200, C439S066000, C439S825000
Reexamination Certificate
active
06233153
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a subassembly, intended for use in motor vehicles in particular, consisting of a one-piece or multi-part housing, a plug unit with connecting pins, and a printed circuit board incorporating strip conductors and capable of accommodating components, whereby the plug unit forms an integral part of the one-piece or multi-part housing and the circuit board is arranged in such a way that the plug unit connecting pins are guided directly onto the circuit board.
A subassembly of this type, in this case configured as an electrical switching device, is described in publication DE 32 48 715 A1. As a means of achieving a moisture-proof housing which is suitable to accommodate, e.g., ignition systems, fuel injection systems, anti-lock braking systems or transmission control systems in motor vehicles, plug connectors
18
(among other things) are integrated into the housing during the manufacturing process by being cast around with plastic (
FIGS. 2
,
3
). In this way, the measures required to seal a separately mounted plug are eliminated.
A disadvantage of this design is that the plug terminals must be connected to the electric switching elements
16
by means of a fastening agent
17
, e.g., bonding wires, which necessitates additional work stages.
SUMMARY OF THE INVENTION
The object of the invention is to provide a subassembly which does not need any fastening components between the connecting pins and the circuit board.
According to the invention, there is a circuit board provided with strip conductors to accommodate components in a one-piece or multi-part housing, with which the plug unit is integrally formed, arranged in such a way that the plug unit connecting pins are guided directly onto the circuit board.
The advantages of the invention, in particular, are that, with the integration of the plug unit into one part of the housing, additional sealing is eliminated and no additional manufacturing operations are needed to achieve an electrical connection between the connecting pins and the strip conductors on the circuit board or components arranged thereon.
Advantageous embodiments, features and developments of the invention.
According to one such feature, contact faces are arranged on the circuit board, while the connecting pins are configured as spring-loaded plug pins. Contact is made by the pressing action of the spring-loaded plug pins onto the contact faces.
According to another feature, the plug unit is provided with stiffening devices which prevent the spring-loaded plug pins from spreading or springing back when pressed against the contact faces of the circuit board.
According to a further feature, locating and assembly aids are provided on the housing and circuit board which permit machine assembly and achieve the effect of guiding the plug unit connecting pins directly onto the contact faces of the circuit board. The spring-loaded plug pins make contact by the application of pressure at that point.
According to another feature, the locating and assembly aids described above are also used as fastening agents between the housing and circuit board or multiple housing components.
According to still further feature, so-called soldering bumps are applied to the contact faces of the circuit.
According to still another, soldering eyelets are arranged on the circuit board as an alternative, into which the plug unit connecting pins are soldered.
According to a particularly advantageous development of the invention contact-making between the connecting pins of the plug unit and the soldering eyelets of the circuit board is achieved in that the connecting pins possess a somewhat larger diameter than the soldering eyelets and are tapered at the tip, so that contact is established when the connecting pins are pressed into the soldering eyelets.
According to another feature, one part of the housing is configured as a baseplate with a surrounding groove, which serves to accommodate another part of the housing configured as a lid or cover. This surrounding groove preferably exhibits a conical profile.
According to another advantageous embodiment of the subassembly an area is formed in the rim of one part of with the housing by means of a two-component injection process, the said area being composed of a different, softer material, the purpose of which is to seal the subassembly against external (environmental) influences such as moisture or dust.
Finally, according to another feature, a number of plug units can also be arranged in one or more components of the subassembly housing.
An advantage of the invention is that no rivets, screws or similar are needed to fasten the individual housing components to each other.
REFERENCES:
patent: 4175810 (1979-11-01), Holt et al.
patent: 4766520 (1988-08-01), Huber et al.
patent: 4993956 (1991-02-01), Pickles et al.
patent: 5206796 (1993-04-01), Thompson et al.
patent: 5210793 (1993-05-01), Carlson et al.
patent: 5215471 (1993-06-01), Reymond et al.
patent: 5266054 (1993-11-01), Duncan et al.
patent: 5699233 (1997-12-01), Zlamal
patent: 3248715 (1984-07-01), None
patent: 3715893 (1988-12-01), None
patent: 3908481 (1990-01-01), None
patent: 3907681 (1990-09-01), None
patent: 4016532 (1990-11-01), None
patent: 91 00 962 U (1991-05-01), None
patent: 3833146 (1991-12-01), None
patent: 91 04 432 U (1992-09-01), None
patent: 91 14 287 U (1993-04-01), None
patent: 4142138 (1993-04-01), None
patent: 91 13 111 U (1993-04-01), None
patent: 93 04 485 U (1993-07-01), None
patent: 4224720 (1994-02-01), None
patent: 0359606 (1990-03-01), None
patent: WO 9603852A1 (1996-02-01), None
patent: 06021666 (1994-01-01), None
Baur Richard
Hora Peter
Wetzel Guido
Wohrl Alfons
Gandhi Jayprakash N.
Kunitz Norman N.
Spencer George H.
TEMIC Telefunken microelectronic GmbH
Venable
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