DE102014116872B4 - Insulating housing with electrical circuitry - Google Patents

Abstract

Insulating housing (2) with an electrical circuit arrangement, with two broad side walls (4), with narrow sides (5) and with narrow base (8) and cover surfaces, with at least one printed circuit board (60, 60") comprising conductor tracks and soldering pads (62). , wherein the circuit board (60, 60") is parallel to the broad side walls (4), and with at least two pairs of connection contacts (45) for connecting electrical conductors with electrical connection of the connection contacts (45) to the circuit board (60, 60" ), the narrow sides (5) also having openings (12, 13) for the connection contacts (45), the electrical connection of the connection contacts (45) present in pairs being made via a flat mounting plate (20, 20") made of insulating material, such that the connection is designed as pairs of busbars (40, 50) which are inserted in the mounting plate, and a soldering pin (43 , 43') for insertion into one of the pads (62) of the printed circuit board (60, 60") and a plug pin (46, 46') for plugging into the mounting plate (20, 20''), wherein at least one of the two wide side walls (4) of the insulating housing (2) comprises receiving means (10) into which the mounting plate (20, 20") can be inserted with a precise fit, characterized in that at least a first of the busbars (40) is between the mounting plate (20, 20") and the printed circuit board (60, 60"), at least a second of the busbars (50) is located on the surface of the mounting plate (20, 20") facing away from the printed circuit board (60, 60"), the at least one first and the at least one second conductor rail (40, 50) are designed as metal strips and are perpendicular to the printed circuit board (60, 60"), the soldering pin (43, 43') being located on each metal strip (40, 50) in the direction of the printed circuit board (60, 60") and the plug pin (46, 46') are formed, wherein the at least one second current bar ne (50) the plug pin (46') is arranged parallel to the soldering pin (43'), and the plug pin (46) of the at least one first busbar (40) is opposite the soldering pin (43).

Description

The invention relates to an insulating housing with an electrical circuit arrangement.

Insulating housings with circuit arrangements, in particular as housings for electromechanical switching devices, are known, with the insulating housing comprising at least one printed circuit board with electronic components and/or assemblies.

In the FR 2 502 445 A1 the case is made up of two halves; there is a printed circuit board in each half of the housing. Also describes the DE 42 12 409 A1 an electronic device with a printed circuit board arranged therein. Similarly, a device in the DE 10 2006 023 660 B4 described.

The insulating housing in the DE 20 2006 006 615 U1 Consists of an upper part of the housing and a lower part of the housing that can be snapped onto a mounting rail. The upper part of the housing has connections for electrical lines, the connections being connected to the lower part of the housing via plug contacts.

From the the DE 44 00 484 A1 a low-voltage switching device accommodating an electrical circuit with a two-part housing is known, in the interior of which printed circuit boards are arranged. The circuit boards carry screw terminals that are directly connected to the circuit boards. The screw terminals have terminal openings which are perpendicular to the printed circuit boards arranged parallel to a connection side of the housing. The terminal openings are accessible through connection openings provided in the connection side. In this way, several printed circuit boards can be accommodated parallel to one another in the housing and the screw terminals can be arranged directly on the printed circuit boards.

From the EP 0 685 906 A1 an insulating housing with electrical circuitry according to the preamble of claim 1 is known.

The object of the invention is to create a connection technology for the insulating housing which can be flexibly adjusted to the type of design and arrangement of the components and assemblies on the printed circuit board.

The solution to the problem is given in the features of the main claim. Further and advantageous configurations are formulated in subclaims.

The invention is based on an insulating housing with an electrical circuit arrangement, which includes a printed circuit board with electronic components and/or assemblies. The insulating housing is designed with two broad side walls, with side, base and cover surfaces which are narrow in comparison to the broad side walls. In other words, the insulating housing has a larger area in the planes of the side walls than in the planes of the side, base and cover surfaces. The circuit board lies parallel to the broad side walls that cover it; in addition, there are at least two connection contacts arranged in pairs for connecting electrical conductors with an electrical connection between the connection contacts and the printed circuit board. The narrow side walls have openings for access to the connection contacts.

In the case of the invention, the electrical connection takes place via connection contacts arranged in pairs, which are mounted on a mounting plate made of insulating material. The connection is in the form of a flat, narrow metal strip as a busbar, the metal strip being perpendicular to the printed circuit board or parallel to the bottom surface of the insulating housing. A soldering pin for insertion into a soldering pad of the circuit board and a plug pin are formed on the metal strip in the direction of the circuit board. At least one broad side wall of the insulating housing includes receiving means, into which the mounting plate lying parallel to the broad side wall can be inserted with a precise fit, with a receiving pocket for the plug pin being formed on the mounting plate.

After plugging the busbars onto the mounting plate, the mounting plate is plugged together with the printed circuit board so that the soldering pins of the busbars are correctly placed in the soldering eyes. Flow soldering assembly is continued in an automatic solder bath process before the completed circuit board is inserted into the insulating housing.

Embodiments of the invention are addressed below. The features of the configurations can be combined with one another individually or jointly—insofar as this is technically sensible.

The mounting plate is contoured for attachment in the insulating housing, preferably in the base area of the housing, and preferably has its greatest longitudinal extent parallel to the bottom surface of the insulating housing.

Receiving means for the mounting plate can be formed in a broad side wall of the insulating housing. The receiving means can be in the form of two conical domes.

On the mounting plate there is a pocket for the plug-in pin (each for one busbar). and an opening for the soldering pin, both of which run perpendicularly to the longitudinal extension of the mounting plate.

Receiving pockets matching the profile of the plug pin can be formed on one side or both sides of the mounting plate. A plurality of receiving pockets arranged in pairs can be present on the mounting plate. The receiving pockets on the mounting plate have a plug-in profile designed to fit the profile of the plug-in pin. The plug pins get into the receiving pockets with a clamping fit, that is to say without any significant elastic expansion of the material of the receiving pockets, and without any burrs forming on the busbar when they are inserted.

Paired retaining lugs for the busbar can be present on the mounting plate.

The conductor rail, which is designed as a flat, narrow strip of metal, carries the connection contact at the first end and has the soldering pin at the second end, opposite the first end. A pair of screw or spring clamp terminals (among others) can be used as connection contacts. Two types of busbars are proposed. A first type is that solder pin and plug pin are on different sides of the busbar. This busbar is intended for mounting on the printed circuit board close to the edge. The first type of busbar should be between the printed circuit board and the mounting plate. The lengths of solder pin and plug pin are about the same. Since the first type I busbar is on the printed circuit board, the length of the soldering pin is correspondingly short. The plug pin opposite the soldering pin finds its position directly in the receiving pocket of the mounting plate, so that this length is also relatively small.

The connection contacts should be designed to be suitable for signal voltages and/or for supply voltages. Supply voltage contacts are preferably only on one side of the mounting plate, so that the supply voltage contacts are accessible in pairs from only one narrow side of the insulating housing and are contacted there. Because these contacts are close together, their spacing is determined by a sufficient thickness of the mounting plate. An insulating distance for voltages of 240 V and more is thus provided across the thickness of the mounting plate.

The insulating housing can be designed in two parts and divided parallel to the broad side walls, it being possible for the broad side walls to be connected to one another via latching means or via a screw connection. There should also be at least one hole in the mounting plate and one hole in the side walls for an existing screw connection. The insulating housing can also be designed to be placed on a profile rail.

The insulating housing can be designed with a stepwise decreasing width from the bottom surface—with a relatively large base width—towards the top surface. The design of the printed circuit board is also designed to match the contour.

• 1: fünf Ansichten einer ersten, nicht beanspruchten Ausführungsform,
• 2: drei Ansichten einer zweiten Ausführungsform,
• 3: eine weitere gestuft gestaltete, nicht beanspruchte Ausführungsform,
• 4: Ansicht auf Innenfläche einer Seitenwand mit Montageplatte,
• 5: Details zur Aufnahmetasche,
• 6: eine zweite Stromschiene (Typ II),
• 7: fünf Ansichten einer dritten Ausführungsform,
• 8: fünf Ansichten einer vierten Ausführungsform,
• 9 fünf Ansichten einer fünften, nicht beanspruchten Ausführungsform, und
• 10 weitere fünf Ansichten der in 3 gezeigten gestuft gestalteten, nicht beanspruchten Ausführungsform.

The invention is illustrated in several drawings, the figures showing in detail:

• 1 : five views of a first embodiment not claimed,
• 2 : three views of a second embodiment,
• 3 : another stepped design, not claimed embodiment,
• 4 : View of the inner surface of a side panel with mounting plate,
• 5 : details on the receiving bag,
• 6 : a second power rail (Type II),
• 7 : five views of a third embodiment,
• 8th : five views of a fourth embodiment,
• 9 five views of a fifth embodiment not claimed, and
• 10 another five views of the in 3 shown stepped designed, not claimed embodiment.

Shown and described in the figures are inventive configurations of the insulating housing, which is essentially prismatic, wherein the 2 and 4 until 8th show claimed configurations of the insulating housing. Two broad side walls 4, of which an exemplary embodiment is shown in 4 is shown, form the front and back of the insulating housing 2. It also has narrow sides 5 and narrow-surfaced bottom 8 and top surface. The insulating housing includes at least one printed circuit board carrying an electrical circuit arrangement; the printed circuit board 60 lies parallel to the wide side walls 4. Electronic components or assemblies and/or printed circuits are located on the printed circuit board. Current paths are formed between soldering eyes 62 and are supplied with current via the connection contacts. The connection contacts are used to connect the supply voltage (e.g. 240 VAC) and/or the working or signal voltage (e.g. 24 VDC).

There are at least two connection contacts 45 for connecting electrical conductors with an electrical connection between the connection contacts 45 and the printed circuit board 60 , the narrow sides 5 also having openings 12 , 13 for the connection contacts 45 . The connection contacts are available in pairs; they can be designed as contacts using screw or spring-cage connection technology. The arrangement in pairs can consist in the connection contacts on both surfaces of the mounting plate 20 facing one another and thus being accessible from the outside on only one of the narrow sides 5 of the insulating housing; or a first connection contact is on one narrow side of the mounting plate and another on the other narrow side of the mounting plate, so that the contact pair can be contacted from both narrow sides 5 of the insulating housing and the openings 12, 13 located there.

In the 1 five views of a first non-claimed embodiment are shown. 1A Fig. 12 is a front view of circuit board 60 and mounting plate 20; 1B is an oversight. the 1C , 1D and 1E are perspective views.

Likewise are in 2 three views of a second embodiment shown. 2A is a front view of a printed circuit board 60 and a mounting plate 20 of another design. the 2 B is a supervision and the 2C is also a perspective view. In the figures, the same parts are marked with the same reference numbers. No current paths and no assembly are shown on the printed circuit boards (for the sake of simplification).

The electrical connection of the existing connection contacts (45) to the printed circuit board 60 takes place via the mounting plate 20 made of insulating material, such that the connection is designed in the form of a flat, narrow metal strip as a busbar 40 (50). The metal strip is perpendicular to the circuit board, or parallel to the bottom surface 8 of the insulating housing. The mounting plate 20 is of essentially flat design, that is to say with a small thickness and, in one of the simplest embodiments, approximately with a rectangular outline. The mounting plate after 1 is smooth on one flat side and is equipped with receiving fields for receiving busbars 40 on the other flat side.

In 1E there is an exploded drawing where four busbars 40 are visible, which lie between the mounting plate and the circuit board (cf. also 1B) . A soldering pin 43 (cf. 2C ) for insertion into a soldering pad 62 of the printed circuit board 60 and a plug pin 46 (cf. 2C ) educated. The busbars 40 (type I) are close to the edge of the printed circuit board, plug pin and soldering pin are relatively short in length.

In 2C An exploded view is shown where two first busbars 40 are visible lying between the mounting plate and the printed circuit board and where four second busbars 50 lie on the surface of the mounting plate remote from the printed circuit board. In the following, we therefore speak of type I (40) and type II (50) of the conductor rails. The conductor rails (40, 50) designed as metal strips are perpendicular to the printed circuit board 60, a soldering pin 43 for insertion into a soldering pad of the printed circuit board 60 and a plug pin 46 being formed on the metal strip in the direction of the printed circuit board. The arrangement of the plug pin 46 is parallel to the soldering pin 43' in type II; and in Type I, the male pin 46 faces the soldering pin 43.

The thickness of the mounting plate, or the distance between the connecting contacts located opposite one another in the mounting plate, is selected to be large enough to provide a sufficient insulating distance for supply voltages of up to 480 V.

With the 3 a further, non-claimed embodiment of mounting plate 20 'and associated circuit board 60' is shown. For mounting the busbars 40 close to the edge, the printed circuit board 60' is designed in the manner of a step. This in 3 (not shown) insulating housing should also be stepped according to this example. 10 shows further views of this embodiment: 10A shows a front view of the printed circuit board 60' and the mounting plate 20' in front of it, 10B is a supervision and the 10C until 10E are perspective views.

In this example shown in the drawing, there are six connection contacts 45 or busbars 40, which are arranged in such a way that the busbars 40 lie between the mounting plate and the printed circuit board. This is preferably a structure in which a current path is formed on the printed circuit board between a connection contact on the left and a connection contact on the right, so that these two connection contacts serve as feed and discharge lines for the associated current on a current path. With the embodiment shown in this example, three current paths and associated electrical functions can thus be activated. Following the example shown 3 can be used when only connection contacts for working or signal voltage are required.

the 4 shows a view of an inner surface of a side wall 2 with a mounting plate 20, but without a circuit board. At least one of Wide side walls 4 includes receiving means 10, in which the parallel to the wide side wall 4 lying mounting plate 20 can be inserted with a precise fit. At least one receiving pocket 24 for plug pins 46, 46' is formed on the mounting plate 20. When the mounting plate is in the installed position, the receiving pocket 24 and an opening for passing through the soldering pin are in the direction of the printed circuit board. Retaining lugs 30 for the conductor rail are arranged in pairs at each opening.

The circuit board and mounting plate are contoured to fit within the insulating housing, preferably in the base area 6 of the housing 2. In addition to the exception means mentioned, a separate receiving field or separate receiving contour can also be formed in one of the side walls for introducing the printed circuit board and mounting plate. The mounting plate preferably sits precisely in the insulating housing; it has no play and mobility against loading of the connection contacts 45, which is present when introducing and attaching external conductors from the outside. The insertion or clamping forces that occur when attaching external conductors to connection contacts 45 are thus absorbed by the receiving means. No forces can be transferred to the pads on the printed circuit board. Like in the 4 shown, the mounting plate also has receiving contours (reference number 24) for contacts arranged on the busbars.

The receiving means 10 in the printed circuit board can be in the form of two conical domes, so that there are bores 32 in the mounting plate 20 that match the domes. The mounting plate 20 can be pressed onto the dome.

The insulating housing after 4 is formed in two parts and divided parallel to the side walls 4, the side walls 4 being connectable to one another via latching means or via a screw connection, a hole 32 formed in the mounting plate 20 also being provided for the screw connection. The insulating housing can be designed to be placed on a profile rail, latching elements (not shown here) for snapping onto the profile rail being present in the bottom area 8 of the insulating housing.

The insulating housing can be designed for side-by-side docking with an electromechanical switching device, with docking elements being formed on one of the broad side walls. Such a switching device can be a contactor or an overload release, or a motor protection switch. The switching device can be acted upon, for example, with ON/OFF switching functions or with supply voltage via the electrical circuit arrangement in the insulating housing.

In the 5 details of the receiving pocket 24 on the mounting plate 20 are shown. Arrow A indicates the position and the top view of the receiving pocket 24 . The receiving pockets 24 have an insertion profile (24) that matches the cross-sectional profile of the insertion pin (46, 46'). The receiving pockets have a rectangular profile with two pockets 26 on the top and two on the bottom, and one pocket 26 on each edge. The size of the receiving pocket 24 is designed as a fitting dimension, so that the conductor rail can be inserted easily, but without leaving a burr on the plug pin. Pockets with a round profile (for pins with a cylindrical cross-section) can also have small pockets on the inside.

In the 6 the second bus bar 50 (of type II) is shown in enlargement. A clamping contact 45 is formed at one end and a soldering pin 43' is formed at the other end of busbar 50, which is designed as a metal strip. The metal strip of this busbar 50 is longer than the metal strip of the first busbar 40 (type I); see also busbars in 1 or 2 . Likewise, the soldering pin 43' is longer than the soldering pin 43 of the first busbar 40. For example 6 states that the pins shown (solder pin 43' and plug pin 46') are prismatic. Reference number 47 is intended to indicate that both pins are chamfered at their front ends.

The connection contacts according to the present invention can be, for example, squirrel cage clamps, push-in clamps or screw clamps. the inside 6 The clamping contact 45 shown is in the direction of the openings on the narrow side 5 of the insulating housing, reference numeral 12 being an insertion opening and reference numeral 13 being an opening for a screwing tool.

The contact following the example of 6 consists of a clamping shell on the busbar and an associated hole perpendicular to the longitudinal extension for receiving the clamping screw. A fine-wire litz wire with a ferrule can be inserted into the terminal contact.

The second type II busbar 50 differs from the first type in that it is longer than the first busbar, with soldering pin 43' and plug-in pin 46' lying on the same side of the busbar here. The soldering pin thus engages in a soldering eye 62 located further from the edge of the printed circuit board. The lengths of the soldering pin and plug-in pin are different, since the second type of busbar is on the side of the mounting plate facing away from the printed circuit board and there via its plug-in pin in the Receiving pocket 24 is inserted.

The plug-in pin 46, 46' can be cylindrical or prismatic, the plug-in profile of the receiving pocket 24 on the mounting plate 20 having a round or rectangular profile 24 designed to fit the plug-in pin 46, 46'. The profile of the plug-in pin 46, 46' is preferably a rectangular profile 24, since this prevents the plug-in pin from twisting in the plug-in profile 24. The plug pins 46, 46' and the soldering pins 43, 43' have a chamfer 47 on their free ends, which facilitates insertion into the receiving pocket 24 with a precise fit.

the 7 until 9 show a third, fourth and fifth embodiment, which is particularly evident in the design of the printed circuit boards (60" and 60"' in FIGS 7 or. 9 ) and/or the number of connection contacts 45 differs:

In the 7 The embodiment shown comprises six connection contacts 45 and three first and second busbars 40, 50 each, which lie on the side of a correspondingly designed mounting plate 20" facing the printed circuit board 60" or on the side of the mounting plate 20" facing away from the printed circuit board 60". come.

In the 8th The embodiment shown uses the same printed circuit board 60 as that in FIGS 1 and 2 shown embodiments, but instead of four or six has a total of eight connection contacts 45, of which four connection contacts 45 can be electrically connected via first or second busbars 40, 50 with corresponding soldering pads 62 on the printed circuit board 60.

In the 9 The non-claimed embodiment shown uses a printed circuit board 60"' with four soldering eyes 62, which can be electrically connected via second busbars 50 to four terminal contacts 45 located on the side of the mounting plate 20 facing away from the printed circuit board 60'".

The present invention provides a connection technology for an insulating housing which, as shown above using various exemplary embodiments, can be flexibly adjusted to the type of design and arrangement of the components and assemblies on the printed circuit board by the design of an insulating material mounting plate and the connection contacts that can be mounted on this mounting plate.

Reference List

2

insulating housing

4

Side panel (front/back)

5

housing narrow side

6

base area

8th

floor space

10

Mounting means (dome or bore in side walls)

12

Conductor insertion opening on the narrow side

13

screw hole

20 20', 20"

mounting plate

24

Receiving pocket with rectangular profile

26

smallpox

30

paired retaining lugs

32

drilling

40

first power rail

43 43'

solder pin

45

clamp contact

46 46'

pin

47

chamfering

50

second power rail

60 60', 60", 60'"

circuit board

62

pads

68

drilling

Claims (10)

Insulating housing (2) with an electrical circuit arrangement, with two broad side walls (4), with narrow sides (5) and with narrow base (8) and cover surfaces, with at least one printed circuit board (60, 60") comprising conductor tracks and soldering pads (62). , wherein the circuit board (60, 60") is parallel to the broad side walls (4), and with at least two pairs of connection contacts (45) for connecting electrical conductors with electrical connection of the connection contacts (45) to the circuit board (60, 60" ), the narrow sides (5) also having openings (12, 13) for the connection contacts (45), the electrical connection of the connection contacts (45) present in pairs being made via a flat mounting plate (20, 20") made of insulating material, such that the connection is in the form of pairs of busbars (40, 50) which are inserted in the mounting plate, and a soldering pin on each of the busbars (40, 50). (43, 43') for insertion into one of the soldering eyes (62) of the printed circuit board (60, 60") and a plug pin (46, 46') for plugging into the mounting plate (20, 20''), wherein at least one of the two broad areas Gen side walls (4) of the insulating housing (2) comprises receiving means (10), in which the mounting plate (20, 20") can be inserted with a precise fit, characterized in that at least a first of the busbars (40) between the mounting plate (20, 20" ) and the printed circuit board (60, 60"), at least a second of the busbars (50) is located on the surface of the mounting plate (20, 20") facing away from the printed circuit board (60, 60"), the at least one first and the at least one second busbar (40, 50) is designed as a metal strip and is perpendicular to the printed circuit board (60, 60"), the soldering pin (43, 43') and the plug pin (46, 46') are formed, with the plug pin (46') being arranged parallel to the soldering pin (43') in the at least one second busbar (50), and with the at least one first busbar ( 40) the plug pin (46) is opposite the soldering pin (43). Insulating housing (2) according to claim 1 , characterized in that the mounting plate (20, 20") has a greatest longitudinal extension parallel to the bottom surface (8) of the insulating housing (2). Insulating housing (2) according to claim 1 or 2 , characterized in that a receiving pocket (24) for the plug pin (46') and an opening for the soldering pin (43') are formed on the mounting plate (20, 20'') for a second conductor rail (50), both of which perpendicular to the longitudinal extension of the mounting plate (20). Insulating housing (2) according to claim 3 , characterized in that the receiving pockets (24) on one or both sides of the mounting plate (20, 20") are designed to match the profile of the plug pin (46, 46'). Insulating housing (2) according to claim 4 , characterized in that a plurality of receiving pockets (24) arranged in pairs are formed on the mounting plate (20, 20"). Insulating housing (2) according to one of the preceding claims, characterized in that the receiving means (10) are in the form of two conical domes (10). Insulating housing (2) according to one of the preceding claims, characterized in that there are paired retaining lugs (30) for the busbar (40, 50) on the mounting plate (20, 20"). Insulating housing (2) according to one of the preceding claims, characterized in that at least one of the conductor rails (40, 50), each designed as a flat, narrow metal strip, carries the connection contact (45) at the first end and the soldering pin ( 43, 43'). Insulating housing (2) according to one of the preceding claims, characterized in that the insulating housing (2) is designed in two parts and is divided parallel to the wide side walls (4), the wide side walls (4) being connectable to one another via latching means or via a screw connection, there being at least one bore (32) in the mounting plate (20, 20") and also in the side walls (4) if a screw connection is present. Insulating housing (2) according to one of the preceding claims, characterized in that the insulating housing (2) is designed with a width that decreases in stages from the bottom surface (8) to the top surface.

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