ELECTRICAL DEVICE, IN PARTICULAR INVERTER OR CONVERTER

Abstract

An electrical device, e.g., an inverter or converter, includes a first and a second printed circuit board. The first printed circuit board includes protruding tab regions, and a respective tab region protrudes into a respective recess of the second printed circuit board. Contact pins, e.g., of one or more plug connector parts, protrude into holes of the second printed circuit board.

Claims

16. An electrical device, comprising: a first printed circuit board including protruding tab regions; and a second printed circuit board including recesses; wherein each tab region protrudes into a respective one of the recesses of the second printed circuit board; and wherein contact pins protrude into holes in the second printed circuit board.

17. The electrical device according to claim 16, wherein the electrical device is arranged as an inverter and/or a converter.

18. The electrical device according to claim 16, wherein the contact pins are arranged as connector parts.

19. The electrical device according to claim 16, wherein the first printed circuit board and the second circuit board are connected to a heat sink of the electrical device.

20. The electrical device according to claim 16, wherein the holes are arranged as vias and the contact pins are soldered to respective holes and/or plug-connected to respective holes.

21. The electrical device according to claim 16, wherein the first printed circuit board is aligned perpendicular to the second printed circuit board.

22. The electrical device according to claim 21, wherein the first printed circuit board is arranged in a first plane and the second printed circuit board is arranged in a second plane, the first plane being aligned perpendicularly to the second plane.

23. The electrical device according to claim 21, wherein a circuit board plane of the first printed circuit board is arranged in a first plane and a circuit board plane of the second printed circuit board is arranged in a second plane, the first plane being aligned perpendicularly to the second plane.

24. The electrical device according to claim 16, the first printed circuit and/or the second printed circuit board is produced with its tab regions by milling out and/or breaking out material from a substantially rectangular printed circuit board and/or the first printed circuit board is constructed integral and/or in one piece with its tab regions.

25. The electrical device according to claim 16, wherein a cross section of a respective recess arranged in a printed circuit board plane of the second printed circuit board has four straight edge sections connected via semicircular edge sections.

26. The electrical device according to claim 25, wherein a first edge section is aligned parallel to a second edge section, a third edge section is aligned parallel to a fourth edge section, the first edge section is aligned perpendicular to the third edge section, the first edge section is connected to the third edge section via a first semi-circular edge section, the third edge section is connected to the second edge section via a second semi-circular edge section, the second edge section is connected to the fourth edge section via a third semi-circular edge section, and the fourth edge portion is connected to the first edge portion via a fourth semi-circular edge portion.

27. The electrical device according to claim 16, wherein each tab region is rectangular.

28. The electrical device according to claim 16, wherein first contact pins between a first tab region and a middle tab region form a first connector and second contact pins between the middle tab region and a third tab region form a second connector.

29. The electrical device according to claim 16, wherein the tab regions are aligned with one another and/or are arranged at a distance from one another along a first straight line.

30. The electrical device according to claim 29, wherein the contact pins are arranged along a second straight line, and the second line is parallel and/or identical to the first straight line.

31. The electrical device according to claim 16, wherein the tab regions of the first printed circuit board are arranged in a plane of the first printed circuit board.

32. The electrical device according to claim 16, wherein the first printed circuit board and the second printed circuit board are rigid.

33. The electrical device according to claim 16, wherein one of the recesses is arranged as a via and the tab region protruding into the recess arranged as a via has a metal conductive region on an outer surface, the recess arranged as a via and/or the metal conductive region are connected to a reference potential and/or an electrical ground, and the metal conductive region is arranged both on an upper side and on an underside of the tab region.

34. The electrical device according to claim 16, wherein the tab regions protrude further on the first printed circuit board than the contact pins.

35. The electrical device according to claim 16, wherein the tab regions protrude further on the first printed circuit board that the contact pins such that a pre-guide for insertion of the contact pins into the holes is formed by the tab regions protruding into the recesses.

36. The electrical device according to claim 16, wherein the tab regions protrude further in a direction of a normal of a plane containing the second printed circuit board than the contact pins on the first printed circuit board.

37. The electrical device according to claim 16, wherein the tab regions protrude further in a direction of a normal of a plane containing the second printed circuit board than the contact pins on the first printed circuit board such that a pre-guide is formed when the contact pins are inserted into the holes by the tab regions protruding into the recesses.

38. The electrical device according to claim 16, wherein each tab region includes a chamfer and/or a centering chamfer.

39. The electrical device according to claim 16, wherein at least one of the holes is arranged a via hole and is connected to an electrical reference potential and/or an electrical ground.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG. 1 is a perspective view of a printed circuit board arrangement of an electrical device before a first printed circuit board 3 is connected to a second printed circuit board 4.

[0027] FIG. 2 is a perspective view of the printed circuit board arrangement after the two printed circuit boards have been connected as a printed circuit board arrangement.

[0028] FIG. 3 is a plan view of the circuit board arrangement.

[0029] FIG. 4 is a cross-sectional view through a partial region of the connection region between the first printed circuit board 3 and the second printed circuit board 4.

DETAILED DESCRIPTION

[0030] As schematically illustrated in the Figures, a first circuit board 3 is attached to a heat sink 1 of the electrical device, e.g., by screws.

[0031] In addition, a power module 2 is fitted on the first printed circuit board 3, which is thermally connected to the heat sink 1 and for this purpose is, for example, pressed onto the heat sink 2 by a screw screwed into a threaded hole in the heat sink, e.g., by its screw head.

[0032] A second printed circuit board 4 has three or more recesses 6 which are unevenly spaced from one another and are arranged one behind the other in a straight line.

[0033] Parallel to this, holes 7 are arranged on the second printed circuit board 7, and contact pins 8 are insertable into the holes 7. These contact pins 8 are held together as a connector part with which the first printed circuit board 3 is fitted.

[0034] In order to prevent tilting when inserting the contact pins 8 into the holes 7, projecting tab regions 5 are formed on the first printed circuit board 3. These are produced by milling away material from the first printed circuit board 3.

[0035] The tab regions 5, which are, for example, narrower than the connector parts, protrude further on the first printed circuit board 3 than the contact pins 8.

[0036] As a result, the tab portions 5 having the base material of the first printed circuit board 3 first come into contact with the second printed circuit board 4 and are inserted into the recesses 6. Only then do the contact pins 8 penetrate into the holes 7. During this penetration of the contact pins 8, however, a guide is already effective, which is effected by the tab regions 5 already located in the recesses 6.

[0037] This is because the recesses 6 each have an edge, at least in part, which rests on the tab region 5 over a surface region or at least on a line.

[0038] As illustrated in FIG. 4, the respective tab region 5 has a rectangular cross section. The cross section of the recess 6, on the other hand, also has four straight edge sections, but these are connected via semicircular edge sections.

[0039] The tab regions 5 are each substantially cuboid in shape. The recesses 6 can be produced with a tool, such as a drill or milling cutter, whose axis of rotation is aligned parallel to the normal of the circuit board plane of the second circuit board 4. This is because the cutter only has to be moved along a straight line to generate the upper horizontal line in FIG. 4, and has then to be moved perpendicular to it to create the vertical line on the left in FIG. 4, whereby the two semicircles of the left half of the figure are generated. Thereafter, the tool can be moved vertically again to create the bottom horizontal line in FIG. 4, and then perpendicularly again to create the vertical line in FIG. 4.

[0040] The tab region 5 is already in contact with the four straight edge regions while the contact pins 8 are being inserted through. Thus, this threading is guided by the tab regions 5 and tilting of the connector part is prevented.

[0041] Due to the irregular spacing of the tab regions 5 from one another, an inverted arrangement of the printed circuit boards 3 and 4 can be prevented.

[0042] As illustrated in FIG. 3, the distance from the first tab region 5 to the middle tab region is smaller than the distance from the last tab region 5 to the middle tab region 5. It is therefore not possible to connect the two printed circuit boards 3, 4 when the first printed circuit board 3 is rotated by 180°, since the three tab portions 5 cannot be inserted into the recesses.

[0043] However, the protruding tab regions 5 also have a protective effect for the contact pins 8 during transport etc.

[0044] The contact pins 8 of the first connector part are arranged between the first tab region 5 and the middle tab region 5.

[0045] The contact pins 8 of the second connector part are arranged between the third tab region 5 and the middle tab region 5.

[0046] By having one of the recesses and/or one of the holes provided as vias, it is possible, when the two printed circuit boards 3 and 4 are plugged in, to first transfer the reference potential and only then close the other electrical connections, e.g., between the contact pins and other via holes.

[0047] The printed circuit boards 3 and 4 are arranged to be rigid, i.e., not as flexible, bendable printed circuit boards. The base material of the printed circuit boards 3 and 4, for example, has an epoxy resin. The circuit boards 3 and 4 are considered here as plate-shaped, that is to say almost two-dimensional parts. Thus, each of the printed circuit boards 3 and 4 is arranged in a respective printed circuit board plane. The directions of the two normals of the circuit board planes are aligned perpendicular to each other.

[0048] In further exemplary embodiments, the tab region is formed with a conductor track which is connected to the reference potential, e.g., to electrical ground. In addition, the recess 6 is plated through as a via, so that when the recess 6 is contacted by the tab region 5, grounding is implemented.

[0049] Alternatively or additionally, however, at least one of the holes that is connected to the reference potential, e.g., electrical ground, is also a via. This ensures that the connection to the reference potential can be carried out directly when the contact pins 8 are inserted.

LIST OF REFERENCE NUMERALS

[0050] 1 heatsink

[0051] 2 power module

[0052] 3 first circuit board

[0053] 4 second circuit board

[0054] 5 tab region

[0055] 6 recess

[0056] 7 hole

[0057] 8 contact pin