DE3936906A1 - Housing for electronic device in motor vehicle - has frame provided by inside surface fitted with two opposing carrier plates - Google Patents

Abstract

The housing incorporates shielding against electromagnetic interference and comprises a surrounding frame (1) with aninside surface (2) fitted with two carrier plates (3,4). The inside surface has two opposing edges (5,6), each with a slot extending parallel to the edge of the frame into which the carrier plates are fitted from either the inside or the outside. Pref., the housing encloses a flexible electronic circuit (26) which is bent into a loop for fitting it into the housing between the opposing carrier plates, the circuit components lying on the inside of the circuit loop. USE/ADVANTAGE - Withstands conditions encountered rear engine, i.e. sealed and firm at temperatures ranging from minus 40 to plus 120 deg.C. Simple mfg. process can be continuously monitored.

Description

The invention relates to a housing for installation in Motor vehicles for holding electronic components and a process for its manufacture.

Such housings are often subject to increased requirements sets, since they the Elek electronics modules in front of the in operation of the motor vehicle Protect occurring loads and faults have to. For example, the housing for electro African modules to offer EMC protection, or must be carried out so that it is suitable for the engine compartment, so is particularly dense and ambient temperatures of Withstand -40 ° C to + 120 ° C. Therefore, for such housing often provided complex structures, what also has high manufacturing costs.

The object of the invention is therefore a Ge to create houses of the type mentioned, the one is professional and inexpensive to manufacture. Furthermore, it is the object of the invention a method of manufacture to specify such a housing with which the Ferti flow monitored and controlled in a simple manner can be.  

These tasks are carried out according to the characteristic note paint the claims 1, 2 and 16 solved.

The first solution according to the invention is therefore one surrounding frame part and two for the housing To provide support plates. Here, these two Carrier plates each in a groove in the frame partially spread that a closed on all sides Housing is created. This housing according to the invention be So it only consists of three parts, which are cheap deliver and are inexpensive to assemble.

The second housing according to the invention consists of a trough-shaped housing part and one as a lid Nenden carrier plate, this carrier plate in spread a groove of the trough-shaped housing part becomes. This housing therefore has only two parts, so that this further reduces manufacturing costs for the housing is achievable.

According to a particularly advantageous development of the Invention are the electronic components on a flexible circuit board arranged as well as the frame part or the side surfaces of the trough-shaped Housing part with one in a connector frame spread connector provided. Here the flexible Circuit board so loop-shaped in the housing mon tiert that one of the side edges of the circuit board the connector is connected, and the printed circuit board going from the connector, along the inner surfaces of the Housing is guided. By using more flexible Printed circuit boards can narrow the electronic components Space.

According to another particularly advantageous further development The invention is the electronic components  also on a flexible circuit board, whereby the Frame part or the side surface of the tubs shaped housing part a first and a second in a common connector frame with an expanded connector having. The flexible circuit board is here introduced in the form of a loop in the housing, so that the two side edges of the loop that close the loop flexible circuit board like this with the two plugs are connected that the one side edge with the first Connector and the other side edge with the second Are connected. The flexible circuit board will likewise, starting from the first connector, along the inner surfaces of the case to the second Plug out. The advantage with such a housing is that input and output signals in two separate connector halves open, but in a common connector frame are spread. In particular, this saves space and costs, since the signals don't go back to the origin side must be returned.

In another particularly preferred embodiment of the Invention are in a case with a tub shaped housing part and a carrier plate the elec electronics components also on a flexible ladder plate arranged, but being opposite tenflächen of the trough-shaped housing part each a connector spread in a connector frame exhibit. Here, one side edge of the flexible PCB with one connector and the opposite lying other side edge of the flexible circuit board connected to the other connector, so that the flexible circuit board, starting from one connector, led to the other connector along the carrier plate becomes. This advantageously makes a Zen  tralelektronikeinheit created where, for example first connector to connect to engine compartment components manufactures and the second connector to connect with serves further assemblies. It also causes here set flexible circuit board a mechanical decoupling plung from plug to plug and can thereby tole be used to compensate for

The flexible printed circuit board is also provided its underside on the inner surface of the carrier plate to stick, causing the of the electronic components he generated heat loss in an optimal way through these me metallic carrier plates can be removed. Here allows the use of flexible printed circuit boards mechanical decoupling of the connector and the carrier plates.

Finally, another, especially before partial development of the invention conductor components that use a lot of heat testify with their heat sinks on the carrier plate di glued right. This is particularly advantageous Show the heat loss quickly to the outside surfaces transfer. Such power semiconductors can for example in saved wiring areas be arranged, where the flexible circuit board Has breakthroughs.

In an advantageous development of this invent Housing according to the invention are the frame part or trough-shaped housing part as an injection molded plastic part manufactured and the carrier plates made of aluminum, galvanized sheet or tinplate. Through this before Partial choice of materials will be extremely low housings cost achieved.  

It is also provided that receive the carrier plates the grooves in the frame part or in the trough-shaped Housing part with molded or liquid seals to verse hen to thereby produce a sealed housing that this makes it suitable for the engine compartment.

The inventive method for producing the he housing according to the invention is characterized in that that the exact assembly at the start of production pen name, preferably plain text and / or Bar coding - i.e. barcode - on the underside ner carrier plate is applied to the outside of the device. This makes it possible to outstandingly in the production flow the types a lot folds the housing according to the invention, which among other things. in Assembly variants and different manufacturing procedures, monitor and control procedures, since the automatic identification by means of the bar codes e.g. B. for pick and place machines, soldering lines, in circuittester, functional test equipment is possible. In particular this is also special for a logged production advantageous.

In the following, the invention is based on the embodiment examples in connection with the drawings are explained.

Show it

FIG. 1a is a cross-sectional view of an example of the exporting approximately Gehäu ses according to the invention,

FIG. 1b a cross-sectional view of the bearing, the plug side surface of the housing of the off guidance example according to Fig. 1a,

Fig. 2A is a sectional representation in the region of the first groove 7 of the housing according to Fig. 1a,

Fig. 2b is a sectional view in the area of two ten groove 8 of the housing according to Fig. 1a,

Fig. 3a perspective view of the flexible printed circuit board of the embodiment of Fig. 1a in the assembled state,

FIG. 3b perspective view of the flexible printed circuit board of Fig. 3a in the folded state,

FIG. 4a is a cross-sectional view of another embodiment of the invention,

FIG. 4b is a sectional view in the region of the groove 12 of the housing according to Fig. 4a,

Fig. 5 is a cross-sectional view of another embodiment of the invention with two separate plugs, and

Fig. 6 shows another embodiment of the inven tion with two separate plugs.

In the drawings there are corresponding parts provided with the same reference numerals.  

In the cross-sectional view of FIG. 1a, a frame part running around is provided with the reference number 1 and the support plates forming the cover or the bottom are identified with the reference numbers 3 and 4 . This circumferential, for example made of plastic-made frame part 1 can be, for example, rectangular, so that the cutting direction of FIG. 1a extends perpendicular to the side of the housing part 1 receiving the plug 27 . The cutting direction of the cross-sectional view of FIG. 1b is now perpendicular to that in Fig. 1a, namely in the plane of the connector 27 supporting the side part. From these two FIGS. 1a and 1b, the encircling character of the frame part 1 can be seen. The frame part 1 has in the edge region 5 a first and in the edge region 6 a second groove 7 and 8 , in which the first carrier plate 3 and the second carrier plate 4 are spread. The on one side part of the housing part 1 to ordered plug comprises a plug frame 27 a and two separate plugs 27 c and 27 d. He invention proper housing of FIGS. 1a and 1b takes a flexible printed circuit board 26 which is mounted looped in the housing, that one of the side edges of the circuit board 26 is connected to the connector 27 c and the circuit board 26, starting from this Plug 27 c first along the inner surface of the second carrier plate 4 and then over the inner side surface 2 of the peripheral frame part 1 to the opposite first carrier plate 3 and back to the second connector 27 d, where the other side edge with this second connector 27th d is connected. Here, the electronic components 25 carry de flexible circuit board 26 brought into the housing such that these components 25 come to lie in the direction of the inner space of the housing.

In the drawings of FIGS. 1a, 2a and 2b and the following FIGS. 4a to 6, the circuit board 26 is shown beabstan det for their base for better clarity.

The process of assembling the flexible printed circuit board 26 will be explained with the aid of the two FIGS . 3a and 3b. In FIG. 3a, the first and second carrier plate is Trä 3 and 4 ver with a strap 34 connected and form herewith a mounting plate for the components 25 supporting flexible circuit board 26. The opposite side edges 28 a and 28 b of this Lei terplatte 26 each carry on a flange-like piece of these side edges the connector 27 c and the connector 27 d. In this arrangement according to FIG. 3a, the flexible printed circuit board 26 is glued to the first and second carrier plates 3 and 4 in an insulating manner. Before this circuit board 26 with the first and second carrier plates 3 and 4 is spread into the circumferential frame part 1 , the web 34 connecting the two carrier plates is separated by means of a punching process and then in the manner shown in FIG Fold lines 26 a to 26 d folded according to FIG. 3a. To form this arrangement according to FIG. 3b, the side edge 28 b of the circuit board 26 to the side edge 28 a of the printed circuit board te 26 is placed in such a way that the flange parts carrying the plugs 27 c and 27 d lie in one plane and thus one side surface of the form a cuboid arrangement. This arrangement according to FIG. 3b is now spread into the frame part 1 in the direction designated by reference numeral 34 according to FIG. 1a.

This process of spreading the two Trägerplat th 3 and 4 in the first and second groove 7 and 8 requires a certain configuration of these grooves, which will be described in the fol lowing in connection with FIGS . 2a and 2b be. The first groove 7 according to FIG. 2b is delimited by two groove walls 13 and 14 , these groove walls projecting beyond the inner surface 2 of the frame part 1 . The groove wall 14 located in relation to the frame part 1 has a cross section such that the outer wall surface 16 forms the groove wall 14 with the plane of the inner surface 2 of the frame part 1 at an acute angle. Thus, the first carrier plate can be spread from the inside via this groove wall 14 into the groove 7 , the first carrier plate 3 being held from the outside by the other groove wall 13 , which is substantially higher than the inner groove wall 14 , in order to thereby firmly hold it to ensure the first carrier plate 3 . A prerequisite for this is that the inner wall surface 15 of this outer groove wall 13 is perpendicular to the plane of the inner surface 2 of the frame part 1 . Since the second carrier plate 4 has to be spread into the second groove 8 from the outside, an outer groove wall 19 of the second groove 8 is also wedge-shaped according to FIG. 2a. Here, the outer groove wall 19 is formed by the side wall surface 18 adjacent to the outer edge 18 of the groove 8 and the end face of the frame part 1 . In order to ensure a secure hold of the spread two th support plate 4 , the inward side wall surface 17 of this second groove 8 is perpendicular to the inner wall surface 2 of the frame part 1 . Finally, the depth of the groove 8 with respect to the plane of the inner surface 2 is greater than the height of the groove wall 19 with respect to the groove base.

According to FIG. 1a of the plug frame 27 a by a circumferential sealing lip 31 is surrounded to form a motor space suitable housing if the two grooves are provided with a shape or liquid gasket 7 and 8. In addition, the plug and the circumferential de sealing lip 31 is protected from mechanical damage by a circumferential flange part 32 .

The housing shown in FIGS. 1a and 1b, closed on all sides, consists of only three parts, which, in conjunction with the flexible printed circuit board, enables inexpensive installation. Especially before geous is the arrangement of the two separate connector halves 27 c and 27 d in the common connector frame 27 a, so that input and output signals can be performed on one connector each. In addition, this plug distribution leads to the fact that circuit board area is saved in the circuit configuration since the signals do not have to be traced back to the original page. Furthermore, such a division into input and output plugs and the wiring area arranged in a closed circuit leads to a reduction in the mutual influences of input and output signals and allows simpler and more targeted EMC protection with regard to radiation resistance and the generation of electromagnetic interference.

Since the carrier plates 3 and 4 are made of metal, power semiconductors can be glued in the saved wiring surfaces of the flexible printed circuit board directly to the metal carrier plates, which results in an optimal transfer of the heat loss to the metal outer surfaces.

The embodiment of a housing according to the invention according to FIG. 4a consists of a trough-shaped housing part 9 and a metal carrier plate 10 provided as a lid. Such a housing can be rectangular, for example, so that the cutting direction of the cross-sectional view according to FIG. 4a is perpendicular to the side surface carrying a plug 27 . The carrier plate 10 is here in a groove 12 provided in the region of the edge 11 of the trough-shaped housing part 9 from the outside. The groove 12 is formed in accordance with the manner shown in Fig. 4b. About a groove wall 24 , which is formed by the adjacent to the outer edge of the housing part 9 side surface 22 of the groove 12 and the end face of the housing part 9 , the metal carrier plate 10 is inserted. For this purpose, this groove wall 24 is provided with a wedge-shaped cross section. The two side surfaces 21 and 22 are perpendicular to the inner side wall surface 23 of the housing part 9 in order to ensure a firm hold of the carrier plate 10 .

This housing is also provided for receiving an electronic components 25 carrying flexible circuit board 26 . This circuit board is introduced in the same manner as that according to the embodiment of FIG. 1a in the housing, but only one side of the flexible circuit board 26 is connected to a connector 27 b spread into a connector frame 27 a. The flexible circuit board 26 is thus out of the connector 27 b along the carrier plate 10 via the side wall surface 23 of the housing part 9 to the bottom part 20 , the circuit board 26 being glued to this carrier plate 10 .

The trough-shaped housing part 9 also has a sealing lip 31 which completely surrounds the plug frame 27 a dig. Finally, the housing part 9 also carries a circumferential flange part 32 , which protects the plug with the circumferential sealing lip 31 against unintentional mechanical damage. This housing according to the invention according to FIG. 4a has only a single carrier plate compared to that of FIGS. 1a and 1b. Here, the trough-shaped housing part 9 consists of egg nem injection molded plastic and the carrier plate 10 can be made of aluminum, galvanized sheet metal or tinplate. Such a housing can be used in particular when electronic components 25 with low heat loss are used, which are then arranged in an advantageous manner in the region of the bottom 20 of the trough-shaped housing part 9 on the flexible printed circuit board 26 . The components producing greater heat loss can then be glued to the metal carrier plate 10 for good heat dissipation via the flexible circuit board 26 . Finally, the groove 12 of the trough-shaped housing part 9 can also be provided with a molded or liquid seal to produce a sealed housing.

The housing of FIG. 5 corresponds in its construction to that of Fig. 1a and 1b, which in a current frame to a part 1 with electronic components fitted by means of two flexible circuit board gerplatten Trä is turned spreads 3 and 4 26th The circuit board 26 is looped along the inner surfaces of this housing starting from the connector 27 c merged to the connector 27 d in a side wall of this housing part 1 and spread in a common connector frame 27 a. In addition, a further connector 33 is provided in this housing according to FIG. 5. This further plug 33 is arranged in the region of the first carrier plate 3 and is connected to the flexible printed circuit board 26 at this point. For this purpose, an opening is made in this first carrier plate 3 , into which the further plug 33 can be spread.

Fig. 6 shows a housing, the structure of which, as in the housing according to FIG. 4a, is based on a trough-shaped housing part 9 and a carrier plate 10 serving as a cover. If this housing part 9 is rectangular, the difference to that according to FIG. 4a is that a plug frame 29 a and 30 a is also arranged on opposite sides of the housing part 9 . A populated with electronic components 25 flexible printed circuit board 26 connects on its opposite Be tenkanten 28 a and 28 b the two connector frames 29 a and 30 a by the flexible circuit board 26 is exclu Lich glued to the support plate 10 degrees. The side edges 28 a and 28 b of the flexible circuit board 26 are each connected to a connector 29 b and 30 b, which are spread into the corresponding connector frame 29 a and 30 a.

Such a housing shown in FIG. 6 may be used advantageously to develop a central Elektronikein integrated in a motor vehicle by a plurality of such housings are arranged side by side and the housing on the plug mutually mitein other are connected.

The previously described embodiments of the inven tion inventive housing for automotive electronics consist of a frame or housing part 1 or 9 and a single support plate or two support plates, which can be spread in a simple manner in the frame or housing part . The frame or housing part can be manufactured as an injection molded plastic part, where, however, the carrier plates consist of metal, for example aluminum, galvanized sheet metal or tinplate. Furthermore, holding devices, for example holding brackets, can be attached to the outer metal surfaces of the carrier plates using known technology, for example gluing or welding. Such Ge housings are inexpensive to manufacture.

The intended for this housing electronic components are angeord net on a flexible circuit board and in a folded manner - as was explained in the above exemplary embodiments - introduced into the housing. The use of such flexible circuit boards advantageously requires a mechanical decoupling from the plug to the carrier plate or, when using two plug frames according to FIG. 6, also a mechanical decoupling from plug to plug, whereby a tolerance-compensating effect can be achieved. The known circuit board technology to be used for this purpose in connection with a simple assembly of the carrier boards carrying the flexible circuit boards in the frame or housing part allows an overall cost-effective electronics housing to be produced.

Claims (16)

1. Housing for installation in motor vehicles to take on electronic components, characterized in that the housing consists of a peripheral frame part ( 1 ) with an inner surface ( 2 ) and a first and second carrier plate ( 3 , 4 ), the inner Surface ( 2 ) of the frame part ( 1 ) has a first edge area ( 5 ) and a second edge area ( 6 ) opposite this, that in the first edge area ( 5 ), parallel to the edge of the frame part ( 1 ), a circumferential first groove ( 7 ) for receiving the first carrier plate ( 3 ) is provided that the first groove ( 7 ) is ausgebil det such that the first carrier plate ( 3 ) can be spread from the inside or outside in the first groove ( 7 ) that in the second edge region ( 6 ), parallel to the edge of the frame part ( 1 ) a circumferential second groove ( 8 ) for receiving the second carrier plate ( 4 ) is easily seen that the second groove ( 8 ) is designed such that the second carrier plate ( 4th ) can be spread from the inside or from the outside into this second groove ( 8 ). 2. Housing for installation in motor vehicles for taking on electronic components, characterized in that the housing consists of a trough-shaped housing part ( 9 ) and a support plate provided as a cover ( 10 ) that in the region of the edge ( 11 ) of the trough-shaped housing part ( 9 ) on the inside, parallel to the edge, a groove ( 12 ) for receiving the carrier plate ( 9 ) is provided that the groove ( 12 ) is designed such that the carrier plate ( 9 ) from the inside or from the outside into this groove ( 12 ) can be spread. 3. Housing according to claim 1, characterized in that the first groove ( 7 ) on the plane of the inner surface ( 2 ) projecting groove walls ( 13 , 14 ) that the inner wall surface ( 15 ) of the edge of the frame part ( 1 ) be adjacent a groove wall ( 13 ) perpendicular to the plane of the inner surface ( 2 ) of the frame part ( 1 ) that the other groove wall ( 14 ) of the first groove ( 7 ) is wedge-shaped such that the first carrier plate ( 3 ) can be spread from the inside over this other groove wall ( 14 ) into the first groove ( 7 ), the outer wall surface ( 16 ) of this other groove wall ( 14 ) being pointed with the plane of the inner surface ( 2 ) of the frame part ( 1 ) Angle forms that the one side surface ( 17 ) adjacent to the first groove ( 7 ) of the second groove ( 8 ) is perpendicular to the plane of the inner surface ( 2 ) of the frame part ( 1 ), that the other side surface ( 18 ) of the second groove ( 8 ) with this side surface ( 18 ) be adjacent the outer surface of the frame part wall has a groove (19), and that said groove wall (19) of the two ten groove (8) is formed in such a wedge shape that the second carrier plate (4) from the outside via this groove wall (19) away in the second groove ( 8 ) can be spread, the height of this groove wall ( 19 ) with respect to the groove base being smaller than the depth of the groove ( 8 ) with respect to the plane of the inner surface ( 2 ) of the frame part ( 1 ). 4. Housing according to claim 2, characterized in that the bottom ( 20 ) of the housing part ( 9 ) adjacent one side surface ( 21 ) of the groove ( 12 ) is perpendicular to the plane of the side wall surface ( 23 ) of the housing part ( 9 ) that the other side surface ( 22 ) of the groove ( 12 ) forms a groove wall ( 24 ) with the edge of the housing part ( 9 ) adjacent to this side surface ( 22 ), and that this groove wall ( 24 ) is wedge-shaped in such a way that the carrier plate ( 10 ) This groove wall ( 24 ) can be spread from the outside into the groove ( 12 ), the height of this groove wall ( 24 ) with respect to the groove base being smaller than the depth of the groove ( 12 ) with respect to the plane of the side wall surface ( 23 ) of the housing part ( 9 ). 5. Housing according to one of the preceding claims, characterized in that the electronic components ( 25 ) are arranged on a flexible printed circuit board ( 26 ) that the frame part ( 1 ) or the side surface ( 23 ) of the trough-shaped housing part ( 9 ) one in a connector frame ( 27 a) spread connector ( 27 b) that the flexible circuit board ( 26 ) is mounted in the form of a loop in the housing that one of the side edges of the circuit board ( 26 ) is connected to the connector ( 27 b), and the circuit board ( 26 ), starting from the plug ( 27 b), is guided along the inner surfaces of the housing. 6. Housing according to one of claims 1 to 4, characterized in that the electronic components ( 25 ) on egg ner flexible printed circuit board ( 26 ) are arranged in that the frame part ( 1 ) or the side surface ( 23 ) of the tub-shaped housing part ( 9th ) has a first and a second in a common connector frame ( 27 a) spread connector ( 27 c, d) that the flexible circuit board ( 26 ) is loop-shaped in the housing mon that the two, the loop closing side edges ( 28 a, b) of the flexible circuit board ( 26 ) are connected to the two plugs ( 27 c, d) in such a way that one side edge ( 28 a) with the first plug ( 27 c) and the other side edge ( 28 b) with the second connector ( 27 d) are connected, and that the flexible circuit board ( 26 ), starting from the first connector ( 27 c), is guided along the inner surfaces of the housing to the second connector ( 27 d). 7. Housing according to one of claims 2 or 4, characterized in that the electronic components ( 25 ) are arranged on a flexible printed circuit board ( 26 ) that opposite side surfaces ( 23 ) of the trough-shaped housing part ( 9 ) each have a in a connector frame ( 29 a , 30 a) spread connector ( 29 b, 30 b) that one side edge ( 28 a) of the flexible circuit board ( 26 ) is connected to the one connector ( 29 b) and the opposite, other side edge ( 28 b) of the flexi blen circuit board ( 26 ) is connected to the other connector ( 30 b), and that the flexible circuit board ( 26 ), starting from the one connector ( 29 b), is guided along the carrier plate ( 10 ) to the other connector ( 30 b) . 8. Housing according to one of the preceding claims, characterized in that the flexible circuit board ( 26 ) is glued with its underside to the inner surfaces of the housing. 9. Housing according to one of the preceding claims, characterized in that power semiconductor components with their heat sinks on the carrier plate ( 10 ) or carrier plates ( 3 , 4 ) are glued directly. 10. Housing according to one of claims 1, 3 or 5 to 9, characterized in that the peripheral frame part ( 1 ) is made as an injection molded plastic part, and that the carrier plates ( 3 , 4 ) consist of aluminum, galvanized sheet metal or tinplate. 11. Housing according to claim 2, 4 or 5 to 9, characterized in that the trough-shaped housing part ( 9 ) is made as an injection molded plastic part, and that the carrier plate ( 10 ) consists of aluminum, galvanized sheet metal or tinplate. 12. Housing according to claim 1, 3 or 5 to 10, characterized in that the first and second groove ( 7 , 8 ) each have a molded or liquid seal. 13. Housing according to claim 2, 4 or 5 to 11, characterized in that the groove ( 12 ) has a shaped or liquid sig seal. 14. Housing according to one of claims 5 to 13, characterized characterized in that the connector frame has a circumferential Has sealing edge. 15. Housing according to one of claims 5 to 14, characterized in that the flexible printed circuit board ( 26 ) has several wiring levels. 16. A method for producing a housing according to one of the preceding claims, characterized in that at the start of production on a carrier plate ( 3 , 4 , 10 ) of the housing a machine-readable code is attached, whereby in the subsequent manufacturing process produc- tion machines len the coding corresponding components Allocate housing and test equipment set up the correct test programs.