Electrical control device

Patent metadata

Field	Value
Publication number	US-2016128208-A1
Application number	US-201414897519-A
Country	US
Kind code	A1
Filing date	May 24, 2014
Priority date	Jun 28, 2013
Publication date	May 5, 2016
Grant date	—

Abstract

An electrical control device ( 10, 70, 90 ) including a housing ( 12 ) for accommodating a printed circuit board ( 14 ), on which an electronic circuit ( 18 ) is arranged, wherein the printed circuit board ( 14 ) rests at least partially on a metallic heat sink ( 24 ) which forms a lower housing part ( 20 ), and is covered completely by an upper housing part ( 22 ), and in which electrical control device ( 10, 70, 90 ) the two housing parts ( 20, 22 ) are joined by a frictionally locking connection and are sealed with respect to one another by a circumferential sealing element ( 44 ). As a result, the housing ( 12 ) has a simple structural and vibration-resistant design which permits cost-effective large-scale fabrication.

First claim

What is claimed is:

1 . An electrical control device ( 10 , 70 , 90 ) comprising
a housing ( 12 ) for accommodating a printed circuit board ( 14 ), on which an electronic circuit ( 18 ) is arranged, wherein the printed circuit board ( 14 ) rests at least partially on a metallic heat sink ( 24 ) which forms a lower housing part ( 20 ), and is covered completely by an upper housing part ( 22 ), and wherein the two housing parts ( 20 , 22 ) are joined by a frictionally locking connection and are sealed with respect to one another by a circumferential sealing element ( 44 ), wherein the upper housing part ( 22 ) is formed with a plastic material, and in that the upper housing part ( 22 ) has a plug-type connection ( 46 ) which is formed integrally thereon and has at least two press-in contacts ( 48 , 50 ) for electrically connecting the printed circuit board ( 14 ) to an external electrical circuit.

2 . The electrical control device ( 10 , 70 , 90 ) as claimed in patent claim 1 , wherein said electrical control device ( 10 , 70 , 90 ) is embodied in such a way that as a result of the joining of the two housing parts ( 20 , 22 ), the electrical formation of contact of the printed circuit board ( 14 ) occurs automatically by the at least two press-in contacts ( 48 , 50 ).

3 . The electrical control device ( 10 , 70 , 90 ) as claimed in claim 1 , wherein an intermediate layer ( 28 ) for improving the transfer of heat is arranged at least partially between an underside ( 26 ) of the printed circuit board ( 14 ) and the lower housing part ( 20 ).

4 . The electrical control device ( 10 , 70 , 90 ) as claimed in claim 1 , wherein a projection ( 34 ), which projects into an interior space of the housing ( 12 ), is formed at least in certain sections near a circumferential housing edge ( 32 ) which is formed on the upper housing part ( 22 ), and wherein the projection ( 34 ) rests after the joining of the two housing parts ( 20 , 22 ) against a side of the printed circuit board ( 14 ) facing the upper housing part ( 22 ).

5 . The electrical control device ( 10 , 70 , 90 ) as claimed in claim 1 , wherein the lower housing part ( 20 ) has a cutout ( 56 , 58 ) near the at least two press-in contacts ( 48 , 50 ).

6 . The electrical control device ( 10 , 70 , 90 ) as claimed in claim 1 , wherein the housing edge ( 32 ) of the upper housing part ( 22 ) has a circumferential groove ( 40 ) with an approximately V-shaped cross-sectional geometry.

7 . The electrical control device ( 10 , 70 , 90 ) as claimed in claim 6 , wherein the lower housing part ( 20 ) has at the housing edge ( 32 ) a circumferential projection ( 42 ) with an approximately V-shaped cross-sectional geometry which extends in the direction of the groove ( 40 ).

8 . The electrical control device ( 10 , 70 , 90 ) as claimed in claim 1 , wherein the lower housing part ( 20 ) has a trough-shaped recess ( 30 ) of low depth for accommodating the printed circuit board ( 14 ) and securing it positionally with respect to forces acting perpendicularly with respect to its surface normal, and wherein the depth of this recess ( 30 ) corresponds at maximum to a thickness of the printed circuit board ( 14 ).

9 . The electrical control device ( 10 , 70 , 90 ) as claimed in claim 7 , wherein the sealing element ( 44 ) is arranged between the groove ( 40 ) of the upper housing part ( 22 ) and the projection ( 42 ) of the lower housing part ( 20 ).

10 . The electrical control device ( 10 , 70 , 90 ) as claimed in claim 1 , wherein the sealing element ( 44 ) is formed with an elastic plastic material with an approximately V-shaped cross-sectional geometry.

11 . The electrical control device ( 10 , 70 , 90 ) as claimed in claim 1 , wherein the press-in contacts ( 48 , 50 ) are embodied in a pin shape and each have an end tip ( 52 , 54 ) which can be pressed into the printed circuit board ( 14 ).

12 . The electrical control device ( 10 ) as claimed in claim 1 , wherein the frictionally locking connection is formed by at least one snap-in element ( 36 ) which is formed integrally on the housing edge ( 32 ) of the upper housing part ( 22 ) and which can be latched to the lower housing part ( 20 ).

13 . The electrical control device ( 70 ) as claimed in claim 1 , wherein the frictionally locking connection is formed by at least one attachment element ( 72 ), such as a screw ( 74 ) or a rivet.

14 . The electrical control device ( 90 ) as claimed in claim 1 , wherein the printed circuit board ( 14 ) is connected to the lower housing part ( 20 ) by at least one attachment element ( 92 ) such as a screw ( 94 ) or a rivet.

Assignees

• Wabco Gmbh

Inventors

• Bolik Thomas
• Kortlang Tobias

Classifications

• H05K5/0052 Primary

  characterized by joining features of the housing parts · CPC title

• H05K7/205

  Heat-dissipating body thermally connected to heat generating element via thermal paths through printed circuit board [PCB] (details of PCBs relating to heat transfer H05K1/0201) · CPC title

• H05K5/061

  sealed by a gasket held between a removable cover and a body, e.g. O-ring, packing · CPC title

• H05K7/20436

  Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing · CPC title

• H05K5/15

  assembled by resilient members · CPC title