DE102010017715B4 - Cover for housing a portion of a circuit board, corresponding electronics housing and mounting method - Google Patents

Abstract

A cover (10) for housing a portion of a printed circuit board (12) and electrical and / or electronic components (40) disposed thereon, the cover (10) having a plurality of adjoining parts (14, 16, 18) and at least two of these Parts (14, 16) projections (22) for insertion into corresponding openings (20) through the circuit board (12) and a further of these parts (18) as a on which the projections (22) having part-mounted cover (18) formed wherein two of the parts (14, 16, 18) have projections (22) and are formed as side walls (14, 16) disposed opposite to each other and perpendicular to the circuit board (12), the extensions (22) being at their end portions (24) latching structures (26) for rearward engagement of the apertures (20) surrounding areas of the printed circuit board (12) and at least in the region of these end portions (24) are deformable, wherein in at least one of the Seitenw at least one bore (44) extending in an associated extension (22) is provided in which a securing bolt (48) is displaceable into a fixing position, in which the securing bolt (48) projects the extension (22) into fixed a mold for permanent rear locking of the associated aperture (20) surrounding area.

Description

The invention relates to a cover for einhausen a portion of a printed circuit board and disposed in this area electrical and / or electronic components, wherein the cover has a plurality of parts attached to each other and at least one of these parts has projections for insertion into corresponding openings through the circuit board and another of these Parts as a on which the extensions having part attached cover is formed. The invention further relates to an electronics housing with at least one corresponding cover and a method for mounting a corresponding cover.

Such a cover is from the utility model DE 297 15 316 U1 known. The cover described there is formed as a metallic shield with a screen frame having extensions for insertion into corresponding openings of the circuit board, and formed with a snap-on this screen frame cover. In order to achieve a shielding effect, the extensions are inserted into the apertures of the circuit board and the screen frame electrically and mechanically connected to the circuit board in a subsequent Schwalllötvorgang.

Such shields are provided for predefined solder joints on the circuit board and correspondingly arranged shielded components or assemblies and therefore dimensioned individually matched to these components or assemblies. The connection between this shield and the circuit board is by soldering a cohesive connection.

In many cases, however, only a touch-safe cover of a portion of a printed circuit board and arranged on this area components is desired. It is particularly desirable that such a cover as easy as possible and without special tools can be mounted.

For Einhausen a complete circuit board and the components arranged thereon z. Example, a modular structure housing ("Phoenix Contact Catalog COMBICON 2009", pages 602 to 617) known that a aufstastbaren on a mounting rail and the circuit board supporting base part with two oppositely arranged and perpendicular to the circuit board extending side walls and a to this Having side walls attached cover.

The DE 83 21 864 shows a housing with latching hook for reaching through openings in a circuit board and for locking on a side facing away from the housing of the circuit board.

The US 6,074,231 shows a mounting assembly with two attachments for connecting a unit comprising a CPU to the main board of a computer, each of the attachments has latching connections with locking pins.

It is an object of the present invention to provide a cover for housing a selectable area of a printed circuit board, a resulting electronics housing, and a method of mounting such a cover which leaves the user with a great deal of choice in positioning the cover and allows easy assembly.

The object is achieved by the features of the independent claims. Advantageous embodiments of the invention are specified in the subclaims.

In the cover according to the invention it is provided that two of the parts have projections and are formed as oppositely arranged and extending perpendicular to the circuit board side walls and that the extensions have latching structures at their end portions for trapping the openings surrounding areas of the circuit board and at least in the area End sections are deformable. To attach the side walls on the circuit board, the extensions are inserted into corresponding openings, wherein the end portions of the extensions are radially compressed in the Raststruckturen. If the end portions of the projections with their latching structures completely submerged through the openings, so relaxes and spreads the end portion with the latching structures on the side wall opposite (bottom) side of the circuit board and the latching structures automatically behind the respective areas around the associated openings.

It is further provided that in at least one of the side walls at least one bore extending into an associated extension is present, in which a securing bolt in a fixing position displaced - in particular displaceable - in which the securing bolt the extension in a form for permanent rear locking of the assigned breakthrough surrounding area. The fixation position is a position within the extension. In particular, the securing bolt is not deformable and fixes the extension inserted into the corresponding opening in its non-compressed, relaxed form or even spreads the extension in the position in which the latching structures engage behind their areas of the circuit board surrounding their associated openings. The securing bolt is advantageously before fixing in the fixing position already arranged in the hole. Preferably, a plurality of bores extending in associated extensions are present in both side walls. In each of these holes in each case an associated safety pin is displaceable in a fixing position, in which this securing bolt fixes the corresponding extension in a form suitable for permanent rear locking of the area surrounding the associated aperture.

The extensions are in particular designed pin-shaped; the latching structures are preferably designed as latching tabs or latching lugs.

The cover is preferably made of transparent / clear material. Such a cover allows a clear view of the circuit board and arranged on the circuit board components and attachments. At the same time a corresponding area of the printed circuit board is housed safe to touch. In particular, it is provided that the cover is formed substantially as a U-profile. In order to create an individual cover, a section of a U-profile adapted to the area of the printed circuit board to be covered is provided and fastened to the side walls latched onto the printed circuit board. The attachment of the cover on the side walls is in particular also a snapping.

Of course, in the case of the type of cover according to the invention, several areas of the printed circuit board can also be covered by a plurality of corresponding covers. By choosing the arrangement of the apertures on / in the circuit board and the selection of a size of the side wall pair (preferably from a set of different sizes sidewalls), the cover or the covers on the circuit board can be freely dimensioned and positioned.

According to an advantageous embodiment of the invention it is provided that the side walls by means of the latching structure breakthrough latching connections with the circuit board non-positively and / or positively connected. Due to the rear locking it comes to a positive connection, by upsetting and spreading of the extensions it comes possibly also to a traction. Due to the resulting positive (and possibly also non-positive) connection between the extensions and the openings a backlash-free attachment of the side walls is ensured on the circuit board. A material connection, as he z. B. when soldering or gluing is achieved is not realized. The connection of the side walls with the circuit board is still a screwless connection. Preferably, the side walls by means of the latching structure breakthrough latching connection with the circuit board non-positively and positively connected.

According to an advantageous embodiment of the cover according to the invention, it is provided that the side walls have holding devices for holding at least one further printed circuit board within the area covered by the cover. The holding devices preferably have grooves, in which further printed circuit boards can be inserted with their side regions. The one printed circuit board is preferably a motherboard and the at least one further printed circuit board corresponding to a daughterboard.

In particular, it is provided that the holding devices are designed as holding devices for holding the further printed circuit board in at least two mutually perpendicular orientations. The orientation of the further printed circuit board (s) is preferably either parallel or perpendicular to the orientation of the one printed circuit board. This is the typical arrangement / interconnection of a printed circuit board designed as a motherboard and the further printed circuit board designed as a daughterboard.

Preferably, the further circuit board is arranged perpendicular to a circuit board. Particularly preferably, the further printed circuit board with its end face abuts the surface of the one printed circuit board. If a plurality of further printed circuit boards are provided, these are advantageously arranged parallel to one another.

According to an advantageous embodiment of the invention it is provided that a plurality of further printed circuit boards are electrically connected to one another via the one printed circuit board.

It is advantageously provided that the side walls have ventilation slots. Sufficient air circulation for cooling electrical and / or electronic components on the further printed circuit board and / or the one printed circuit board in the region covered by the upper part can be achieved through the ventilation slots. The ventilation slots are formed by wall openings, which are so narrow that a touch safety is guaranteed.

It is preferably provided that the side walls mounting structures for mounting a fan, in particular axial fan, have. To dissipate the thermal energy due to the power loss of the electrical and / or electronic components, a fan is mounted on at least one of the side walls. This drives the air circulation between the covered area of the circuit board and the ambient air.

The invention further relates to an electronics housing with at least one aforementioned Cover and a circuit board, wherein the extensions of the side walls of the cover are inserted into corresponding apertures through the circuit board and the latching structures of the projections which engage behind the respective openings areas of the circuit board.

According to an advantageous embodiment, it is provided that the electronics housing according to the invention is designed as an electronics housing for placement on a mounting rail, wherein the circuit board is supported by a latchable on the support rail base part of the housing. It is particularly provided that the side walls are non-positively and / or positively connected to the circuit board.

It is advantageously provided that the base part has an extruded profile part and two end elements terminating the extruded profile part at its two ends. Such a configuration is known from extruded profile assembly housings ago. In this case, the extruded profile can be brought to desired length and completed with the final elements. The extruded profile part and the end elements form a substantially trough-shaped base part.

It is preferably provided that the base part has a locking device by means of which the base part on the mounting rail is releasably fastened.

The inventive method for mounting a cover mentioned above on a printed circuit board with breakthroughs has the following steps: (a) inserting the extensions of the side walls in the corresponding openings until the latching structures at the end portions of the projections behind the openings surrounding areas of the circuit board and (b ) Attaching at least one associated cover on the side walls to form the cover.

In particular, it is provided that the shape of at least one of the inserted projections in the rear locking position is fixed by displacing a securing bolt in a bore extending into the extension. The securing bolt is in particular brought into a section of the bore within the extension, so that the latching structures of this extension are fixed in the rear-latching position.

According to an advantageous embodiment of the invention it is provided that after snapping the side walls further circuit boards are inserted into holders of the side walls and these other circuit boards are arranged after attachment of the cover within the electronics housing.

The invention will be explained in more detail below with reference to the accompanying drawings with reference to a preferred embodiment.

Show it:

1 a printed circuit board and a first side wall for forming a side wall pair of a cover,

2 the circuit board and the latched on the circuit board first side wall of the 1 and a second side wall to be unlocked,

3 the arrangement of 2 , wherein further printed circuit boards are inserted into holding devices of the two side walls,

4 a detailed view of the 3 in the field of holding devices,

5 the arrangement of 3 with a cover to be attached to the side walls,

6 fixing the cover mounted on the printed circuit board according to a preferred embodiment of the invention,

7 the fully assembled cover of the 6 in a side view,

8th a sectional view through a side wall in the region of one of its extensions,

9 an electronics housing with circuit board, cover and a fan to be mounted on one of the side walls of the cover, and

10 an electronics housing with a base part, a cover and an arranged between the cover and base part circuit board.

The 1 to 6 show the assembly steps of mounting a cover 10 on a circuit board 12 , The cover is a cover 10 for housing a dedicated area of the circuit board 12 and arranged on this area components. The cover 10 consists of two in the 1 to 6 shown side walls 14 . 16 and one in the 5 and 6 shown cover 18 ,

For mounting the cover 10 are first breakthroughs 20 (or alternatively recesses) at the edge of einhausenden area of the circuit board 12 prepared. In these breakthroughs 20 become associated extensions 22 the side walls 14 . 16 plugged in. The extensions 22 are radially deformable or have at least one radially deformable end portion 24 on, on the latching structures 26 are formed. These locking structures 26 are in turn - as in 2 visible - formed as radially arranged opposite each other locking lugs. To ensure a sufficient deformability, the extensions have 22 the structure of a slotted hollow cylinder.

Be the extensions 22 so far into the breakthroughs 20 pushed in until the side walls 14 . 16 with their respective lower edge on the top 28 the circuit board 12 bump, so have the end sections 24 of the extensions 22 the breakthroughs 20 in the circuit board 12 completely penetrated and spread radially so far that the locking structures 26 respective breakthroughs 20 surrounding areas of the circuit board 12 on one of the top 28 opposite bottom 30 engage behind. This results in a positive connection between the side wall 14 . 16 and circuit board 12 ,

The 1 shows the circuit board 12 with a first mounted side wall 14 and the 2 shows the subsequent assembly of the second side wall 16 ,

Each of the side walls 14 . 16 has designed as guides and / or detents holding devices 32 for holding additional circuit boards 34 . 36 . 38 , These other circuit boards 34 . 36 . 38 are in 3 shown. The holding devices 32 are doing as holding devices 32 for holding the other circuit boards 34 . 36 . 38 formed in two mutually perpendicular orientations. One of the orientations is parallel to the one printed circuit board 12 , the other orientation perpendicular to the circuit board 12 , The orientation used in the embodiment is the orientation perpendicular to the circuit board 12 ,

The 3 shows the circuit board 12 , the side walls 14 . 16 and into the fixtures 32 of these side walls 14 . 16 perpendicular to the orientation of a circuit board 12 inserted and held there further circuit boards 34 . 36 . 38 ,

Each of the other circuit boards 34 . 36 . 38 is as a daughter board designed as a motherboard a circuit board 12 trained and wearing, like 3 shows, various electrical and / or electronic components 40 , The other circuit boards 34 . 36 . 38 and the components connected to them 40 are among each other via the one printed circuit board 12 electrically connected to each other.

The 4 shows in detail one of the holding devices 32 with components for parallel and components for vertical mounting of the other circuit boards 34 . 36 . 38 in relation to the one printed circuit board 12 , In addition to the holding devices 32 , which have substantially formed as grooves structures, shows the representation of a side wall 14 in 4 furthermore exemplary as ventilation slots 42 Trained breakthroughs through the side walls 14 . 16 ,

The 5 shows the arrangement of 3 (but without the other circuit boards 34 . 36 . 38 ) and one on the associated side walls 14 . 16 To be fastened cover 18 , which is designed substantially as a U-profile. The cover 18 and the side walls 14 . 16 make up the cover 10 which by the arrangement of the breakthroughs 20 certain area of a circuit board 12 overlaps and thus einhaust. This cover 10 ensures a safe-to-use arrangement of the components 40 in the one of the cover 10 covered area. Attaching the cover 18 on the side walls 14 . 16 is in particular a snapping or clipping the hood 18 on corresponding structures of the side walls 14 . 16 , Thus, the cover is completely mounted.

In 6 is now fixing the mounted cover 10 on the circuit board 12 shown. As in 8th can be seen, the side walls show 14 . 16 in associated extensions 22 extending holes 44 on. In the extension 22 extending section of the holes 44 is achieved by means of a tool (eg a screwdriver) 46 a safety bolt 48 inserted. This in 8th shown safety bolts 48 fixes the extension 22 in a radially not (more) compressible form, in which the latching structures 26 behind you the breakthrough 20 surrounding area of the circuit board 12 rest. The safety bolts 48 are inside the hole 44 for displacement in the extension 22 extending portion releasably fixed prepared. To fix the safety bolts 48 by pressure in the direction of the arrow 50 detached from their respective anchorage and into the section of the bore 44 moved within the associated extension.

The 7 shows the on the circuit board 12 ready mounted and fixed cover 10 with side walls 14 . 16 and with the cover designed as a U-profile 18 , The structures on the side walls 14 . 16 for locking the cover 18 are designed so that the cover 18 in the locked state, a distance of 2.5 mm to the circuit board 12 (Motherboard).

The 8th shows in section one of the side walls 14 . 16 which is one of an associated extension 22 extending bore 44 in the one safety bolt 48 is prepared. This is about breaking points on a sudden taper of the bore 44 fixed / anchored.

Do the extensions 22 during assembly of the side walls 14 . 16 the corresponding breakthroughs 20 with their end sections 24 penetrates, it comes to the rear handle and a corresponding positive connection between the circuit board 12 and corresponding side wall 14 . 16 , To fix this condition is now the safety pin 48 by means of the tool 46 broken out and in the opposite of the remaining bore tapered portion of the bore in the extension 22 pressed in (arrow 50 ), so that it is secured against a possible radial compression. In addition to the positive connection can thus be added to the secured extension also a frictional connection in the manner of a pressure union.

The 9 shows a through the mounting of the cover 10 on the circuit board 12 developed electronics housing 52 , This includes the cover 10 and the circuit board 12 , where the extensions 22 the side walls 14 . 16 into the corresponding breakthroughs 20 through the circuit board 12 are plugged in and the locking structures 26 of the extensions 22 the respective breakthroughs 20 surrounding areas of the circuit board 12 behind rest.

The division of the ventilation slots 42 in the side walls 14 . 16 is in the example of 9 so chosen that fan 54 various sizes (from 10 × 10 to 25 × 25) on the outside of each of the two side walls 14 . 16 by means of mounting structures (not shown) can be mounted in snap-in mounting.

The 10 finally shows an extension of the electronics housing 52 by a latchable on a DIN rail base part 56 , in turn, the one circuit board 12 holds.

The base part 56 consists of an extruded profile part 58 and two completion elements 60 . 62 , Clearly visible is a recess 64 for receiving the mounting rail and one of a side portion of the base part 56 into the recess 24 Sufficient locking device 66 for locking the mounting rail in the recess 64 ,

• 1. Aufbau des Sockelteils 56 aus dem Strangprofilteil 58 und den Abschlusselementen 60, 62, wobei dabei gleichzeitig die als Hauptplatine ausgebildete Leiterplatte 12 in Halteeinrichtungen des Sockelteils 56 eingesetzt wird. Die Leiterplatte 12 wird zuvor oder anschließend mit entsprechenden Durchbrüchen 20 versehen (1).
• 2. Aufrasten von zwei Seitenwänden 14, 16 auf der einen Leiterplatte 12 (1 und 2).
• 3. Optionales Einstecken von weiteren Leiterplatten 34, 36, 38 in Haltevorrichtungen 32 der Seitenwände 14, 16 (3 und 4).
• 4. Aufsetzen der Abdeckhaube 18 auf die Seitenwände 14, 16 und Befestigen der Abdeckhaube 18 an selbigen (5 und 6).
• 5. Fixieren der Abdeckung 10 auf der Leiterplatte 12 durch verschieben der Sicherungsbolzen 48 in den sich in die Fortsätze 22 erstreckenden Bohrungen 44 innerhalb der Seitenwände 14, 16.
• 5. Optionales Befestigen eines Lüfters 54 an einer der Seitenwände 14, 16 (9).

This results in the following steps for mounting the in 10 shown electronics housing 52 :

• 1. Construction of the base part 56 from the extruded profile part 58 and the final elements 60 . 62 , while at the same time formed as the motherboard circuit board 12 in holding devices of the base part 56 is used. The circuit board 12 will be before or afterwards with appropriate breakthroughs 20 Mistake ( 1 ).
• 2. Snap on two side walls 14 . 16 on the one circuit board 12 ( 1 and 2 ).
• 3. Optional insertion of additional printed circuit boards 34 . 36 . 38 in holding devices 32 the side walls 14 . 16 ( 3 and 4 ).
• 4. Attaching the cover 18 on the side walls 14 . 16 and securing the cover 18 at the same ( 5 and 6 ).
• 5. Fix the cover 10 on the circuit board 12 by moving the safety bolts 48 in the extensions 22 extending holes 44 inside the sidewalls 14 . 16 ,
• 5. Optional mounting of a fan 54 on one of the side walls 14 . 16 ( 9 ).

Of course it is also possible to have several covers 10 on the one circuit board 12 to fix.

LIST OF REFERENCE NUMBERS

10

cover

12

circuit board

14

Side wall

16

Side wall

18

cover

20

breakthrough

22

extension

24

end

26

Rest structure

28

top

30

bottom

32

holder

34

Further printed circuit board

36

Further printed circuit board

38

Further printed circuit board

40

module

42

vent

44

drilling

46

Tool

48

safety bolt

50

arrow

52

electronics housing

54

Fan

56

base part

58

Extruded section

60

termination element

62

termination element

64

recess

66

locking device

Claims (12)

Cover ( 10 ) for housing a portion of a printed circuit board ( 12 ) and arranged in this area electrical and / or electronic components ( 40 ), the cover ( 10 ) several parts attached to each other ( 14 . 16 . 18 ) and at least two of these parts ( 14 . 16 ) Extensions ( 22 ) for insertion into corresponding breakthroughs ( 20 ) through the printed circuit board ( 12 ) and another of these parts ( 18 ) as one on which the extensions ( 22 ) having part attached cover ( 18 ), wherein two of the parts ( 14 . 16 . 18 ) Extensions ( 22 ) and arranged as opposed to each other and perpendicular to the circuit board ( 12 ) extending side walls ( 14 . 16 ) are formed, wherein the extensions ( 22 ) at their end sections ( 24 ) Latching structures ( 26 ) for locking the breakthroughs ( 20 ) surrounding areas of the printed circuit board ( 12 ) and at least in the region of these end sections ( 24 ) are deformable, wherein in at least one of the side walls ( 14 . 16 ) at least one in an associated extension ( 22 ) extending bore ( 44 ) is present, in which a safety bolt ( 48 ) is displaceable in a fixing position, in which the safety bolt ( 48 ) the extension ( 22 ) in a mold for permanently locking the associated breakthrough ( 20 ) surrounding area. A cover according to claim 1, wherein the side walls ( 14 . 16 ) by means of the latching structure breakdown latching connection with the printed circuit board ( 12 ) are positively and / or positively connectable. Cover according to one of the preceding claims, wherein the side walls ( 14 . 16 ) Holding devices ( 32 ) for holding at least one further printed circuit board ( 34 . 36 . 38 ) within the cover ( 10 ) covered area. Cover according to claim 3, wherein the holding devices ( 32 ) as holding devices for holding the further printed circuit board ( 34 . 36 . 38 ) are formed in at least two mutually perpendicular orientations. Cover according to one of the preceding claims, wherein a plurality of further printed circuit boards ( 34 . 36 . 38 ) with each other by means of a printed circuit board ( 12 ) are electrically connected. Cover according to one of the preceding claims, wherein the side walls ( 14 . 16 ) Ventilation slots ( 42 ) exhibit. Cover according to one of the preceding claims, wherein at least one of the side walls ( 14 . 16 ) Mounting structures for mounting a fan ( 50 ), in particular axial fans. Electronics housing ( 52 ) with at least one cover ( 10 ) according to one of the preceding claims and a printed circuit board ( 12 ), the extensions ( 22 ) of the side walls ( 14 . 16 ) of the cover ( 10 ) into corresponding breakthroughs ( 20 ) through the printed circuit board ( 12 ) are inserted and the latching structures ( 26 ) of the extensions ( 22 ) the respective breakthroughs ( 20 ) surrounding areas of the printed circuit board ( 12 ). Electronics housing according to claim 8, wherein this as electronics housing ( 52 ) is designed for placement on a mounting rail and the circuit board ( 12 ) of a aufrastbaren on the DIN rail base part ( 56 ) will be carried. Electronics housing according to claim 9, wherein the base part ( 56 ) a locking device ( 66 ), by means of which the base part ( 56 ) Is detachably fastened on the mounting rail. Method for mounting a cover ( 10 ) according to one of claims 1 to 7 on a printed circuit board ( 12 ) with breakthroughs ( 20 ), the method comprising the following steps: - inserting the extensions ( 22 ) of the side walls ( 14 . 16 ) into the corresponding breakthroughs ( 20 ) until the latching structures ( 26 ) at the end sections ( 24 ) of the extensions ( 22 ) the breakthroughs ( 20 ) surrounding areas of the printed circuit board ( 12 ) and - attach at least one associated cover ( 18 ) on the side walls ( 14 . 16 ) to form the cover ( 10 ). The method of claim 11, wherein the shape of at least one of the inserted extensions ( 22 ) in the latching position by moving a locking bolt ( 48 ) in a down to the extension ( 22 ) extending bore ( 44 ) is fixed.

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