WO2009124522A1

WO2009124522A1 - Shielding device of a plug connection for a vehicle and method for the production thereof

Info

Publication number: WO2009124522A1
Application number: PCT/DE2009/000362
Authority: WO
Inventors: Swen Wiethoff; Sönke GÜRTLER; Knut Welke; Egbert Spanner; Harald Thamm; Uwe Zimmermann; Peter Volkert
Original assignee: Temic Automotive Electric Motors Gmbh
Priority date: 2008-04-10
Filing date: 2009-03-14
Publication date: 2009-10-15
Also published as: DE102009009091A1; DE112009001401A5

Abstract

The invention relates to a shielding device (1) of a plug connection between a housing (2) and a wiring harness of a vehicle and to a method for the production thereof. To this end, the shielding device (1) comprises input and output connections of the housing (2), plug contacts (3) of a plug (4) or of a socket, which protrude out of the housing (2) in an electrically insulated manner, and inside connections (5), which extend into the housing (2). The plug contacts (3) are disposed on an interference suppression circuit board (6), which has input and output connections of the housing (2). On the interference suppression circuit board (6), conductive tracks (7) connect the plug contacts (3) to a terminal strip (8) on an edge (9) of the interference suppression circuit board (6). The terminal strip (8) has inside connections (5) and is disposed in the housing (2) together with the interference suppression circuit board (6). A plastic mass (11) completely surrounds the interference suppression circuit (6) and partially covers a shielding hood (10). The plug contacts (3) protrude through the shielding hood (10) and out of the plastic mass (11), while the inside connections (5) of the terminal strip (8) are free of plastic mass (11).

Description

description

Shielding device of a connector for a vehicle and method for producing the same

The invention relates to a shielding device of a plug connection between a housing and a cable tree of a vehicle and a method for producing the same. For this purpose, the shielding device has input and output connections of the housing, plug contacts of a plug or a socket which protrude in an electrically insulated manner from the housing, and internal connections which project into the housing.

From the document DE 40 40 218 Al a device for shielding electrical components or components is known. A complete shielding in the region of the plug arrangement is disclosed by improving the electromagnetic compatibility of electronic assemblies in this document. For this purpose, areas of the plugs connected to a printed circuit board are arranged in a space formed by the plug body, the printed circuit board and a shielding plate. The shielding plate is sunk into a continuous groove in the plug body. In this depression protrude the edge regions of the plug body comprehensive end wall of a housing cover.

For improved contact between the lid and the shield plate, the plug body has a trapezoidal cross-section. This known device for shielding has the disadvantage that still a high proportion of noise can act on the board, especially as the board or circuit board protrudes into the plug-in arrangement. In other connector systems, interference signals are applied to the printed circuit board via a multi-pole connector system attached to a metal housing with cable tail, so that such connector systems, as known from the prior art, neither meet the high requirements of the automotive industry for EMC attenuation limits by shortening Cable lengths can still meet by shielding the cable tail with a bounded on both sides of the housing ground brass shield braid and other additional ferrite cores.

The object of the invention is to provide a shielding device of a connector between a housing and a wiring harness of a vehicle and a method for producing such a shielding device, which overcomes the disadvantages of the prior art and meets the high requirements of the automotive industry for EMC attenuation limits.

This object is achieved with the subject of the independent claims. Advantageous developments of the invention will become apparent from the dependent claims.

According to the invention, a shielding device is provided for a plug connection between a housing and a cable harness of a vehicle and a method for producing the same. For this purpose, the shielding device has input and output connections of the housing, plug-in contacts of a plug or a socket, which protrude electrically insulated from the housing, and inner terminals, which protrude into the housing on. The plug contacts are conductively connected to a suppression board, which has the input and output connections of the housing. Tracks on the suppressor board connect the plug contacts to a connection strip on one edge of the suppressor board. The terminal strip has the internal connections and is arranged together with the suppression board in the housing. A plastic compound completely encloses the suppressor board and partially covers a screening hood. The plug contacts protrude through the shielding hood and out of the plastic mass, while the inner terminals of the terminal block are free of plastic compound.

This shielding device has the advantage that it can be arranged to save space in any housing in the region of an opening of a metal wall. Since the Entstörplatine practically covers the opening and is concealed at the same time with a metal layer which cooperates with a Abschirmhaube, it is practically impossible that interference from the outside acting on the boards arranged in the housing and vice versa interference fields are discharged through internal boards to the outside , The interaction of the suppressor, which is laminated on one side metallically, with a screening hood covers the opening in the side wall of the housing, through which the plug contacts protrude, almost completely. By introducing such

Suppressor board is the shielding in the housing arranged circuit boards improved before interference fields or perfected.

Preferably, the plug contacts are designed as flat contacts, but this has an effect on the shielding itself. The EMC suppression board is a populated board that is equipped with flat contacts, tracks, with a plastic extrusion, a multi-pin terminal block for inner cable connections and possibly with seals for sealing a plug opening in a housing. In the manufacture of the shielding device, the prefabrication of such a suppressor board is crucial to the shielding effect of the shielding device. The shielding hood is preferably electrically conductively connected to a metal-laminated side of the suppressor board. Thus, the plug contacts can be closely surrounded by a shielding coating, since the plug contacts protrude into the suppression circuit board and the metal-clad side or surface is brought close to the plug contacts. In order to ensure the electrically conductive connection between the shielding hood and the metal-clad side of the suppressor board, a solder connection, a spring connection or a press connection can be provided between the shielding hood and the suppressor board.

A socket housing surrounds the protruding from the housing flat contacts, protects them from damage and serves as a mating connector for another connector, not shown. For this purpose, the socket housing can be fixed on a housing wall from the inside. have and for fixing blind holes with threaded bushings. Preferably, a cable tail is mounted on the inner multi-pin terminal block, which leads to Mehrfachsteckverbindungen of arranged in the housing Neten circuit boards. Thus, these circuit boards are not provided in the vicinity of the shielding device, but rather may be located remotely from the suppression board. Preferably, the shielding cap has a copper alloy, in particular a brass alloy or a stahldelstahllegierung to avoid contact corrosion with a stainless steel housing.

A method for producing a shielding device for a plug connection between a housing and a cable harness of a vehicle has the following method steps. First plug contacts are on a suppressor, which has a terminal strip for a cable tail in the interior of the housing and interconnects in an edge region, applied and fixed. In this case, the plug contacts are positioned such that printed conductors, which are present on the suppression board, establish an electrical connection between the plug contacts and the terminal block. After that or in parallel, a screening hood can be produced, which has openings for the plug contacts and is electrically connected to a metallized side of the suppressor board. This is followed by complete embedding of the suppressor board in a plastics material and partial embedding of the terminal block as well the plug contacts and the screening hood in a plastic compound.

Thereafter, the receptacle housing can be manufactured with a mounting flange, wherein threaded bushes are introduced into the mounting flange. Thereafter, the suppression board is fixed to the shielding hood on a metallic inner wall of the housing in the region of an opening of the housing wall, through which the plug contacts of the suppression board protrude outward, while at the same time fixing the socket housing on the outside of the housing wall. An unillustrated contact holder can also be attached as a separate component for receiving the flat contacts on the suppression circuit board. With this component can then be done fixing the shielding plate to the housing.

By dividing the plug into an inner contact holder and an outer receptacle housing, the

Position of the outer connector to the inner contact holder are coded to avoid incorrect assembly thereof.

The invention will now be explained in more detail with reference to the accompanying figures.

FIGS. 1 to 5 show production stages of the production of a shielding device according to an embodiment of the invention; Figure 1 shows a schematic diagram of a Suppressor board;

FIG. 2 shows the suppressor plate according to FIG. 1 with the shielding hood applied;

FIG. 3 shows the suppressor plate according to FIG. 2 after application of a plastic compound;

Figure 4 shows a schematic cross section through a receptacle housing;

FIG. 5 shows a schematic cross section through a finished shielding device.

1 shows a schematic diagram of a suppression board 6. For this purpose, the suppression circuit board 6 is laminated on both sides with metal structures. While the side 7 has a nearly closed metal layer, preferably made of a copper alloy, the component side 13 is only partially metal-laminated. The suppressor board has strip conductors which connect the plug contacts 3 electrically with internal terminals 5 at an edge 9 of the suppressor 6, which belong to a terminal block 8 to which a Kabelschwänz can be attached. While the suppressor is arranged within a housing, not shown here, the plug contacts 3 protrude through an opening in a housing wall out of the housing. FIG. 2 shows the suppressor plate according to FIG. 1 with the shielding hood 10 applied. The shielding hood 10 has an opening 17 through which the plug contacts of the suppressor plate 6 protrude. The shielding hood 10 is fixed on the metal-laminated side 7 of the suppressor board. This fixation is carried out in this embodiment of the invention by soldering the shielding hood 10 on the metal-laminated side 7 of the suppression circuit board 6. Next, the suppression board is covered by a plastic compound, as shown in the next figure 3.

FIG. 3 shows the suppressor plate 6 according to FIG. 2 after application of a plastic compound 11. This plastic compound 11 completely covers the suppressor plate 6, wherein the internal connections 5 remain free of plastic compound. The shielding hood 10 is largely embedded in the plastic compound 11 and the plug contacts 3 and a contact holder, not shown, are also largely surrounded by plastic material. This gives the plug contacts 3 and a board assembly on the component side 13 a protection against moisture and high stability and are protected from damage.

FIG. 4 shows a schematic cross section through a socket housing 14, which has a fastening flange 18 and has at least one blind hole with threaded bushing 16 in the fastening flange 18. This plug sleeve housing 14 can be produced in a single injection molding step and can then be transferred via a Innenverschraub with the suppressor 6 and a housing wall are mechanically connected.

FIG. 5 shows a schematic cross section through a finished shielding device 1. In this case, the shielding device is screwed onto a metallic housing wall 15, wherein the screw fixing takes place from the inside 19 of the housing wall and the screw fixing at the same time fixes and positions the plug-in sleeve housing applied from the outside. By this shielding ensures that no active circuit boards must be arranged in the vicinity of the plug contacts, but only the suppression board is arranged with the transition from the inner terminals to the plug contacts in the vicinity of the plug opening 12 in the housing wall 15. Furthermore, FIG. 5 shows that the shielding hood 10 with the suppressor board 6 is arranged directly on the housing and the suppressor board 6 has a plurality of layers which, however, overall have a minimum space-saving height for the suppressor board. A one-sided assembly of the suppressor 6 can be arranged within the shielding hood 10. The board assembly of the Entstörplatine 6 and the Abschirmhaube 10 are aligned with the housing. This has the advantage that the interface between the housing and connector is extremely compact and space-saving feasible. LIST OF REFERENCE NUMBERS

1 shielding device

2 housing 3 plug contact

4 plugs

5 indoor connection

6 Suppressor board

7 trace 8 terminal block

9 edge of the board

10 shielding hood

11 plastic mass

12 plug opening 13 component side

14 receptacle housing

15 housing wall

16 blind hole with threaded bush

17 Opening in the screening hood 18 Mounting flange

19 inner wall of the housing

20 outside

Claims

claims

1 . Shielding device of a plug connection between a housing (2) and a wiring harness of a vehicle comprising: - the housing (2),

- Input and output connections of the housing

(2),

Plug contacts (3) of a plug (4) or of a socket, which protrude electrically isolated from the housing (2),

- Inner terminals (5) which protrude into the housing (2), wherein the plug contacts (3) on a suppression board (6) having the input and output connections of the housing (2) are arranged, and wherein conductor tracks (7) on the suppression board (6) the plug contacts (3) with a terminal block (8) on one edge

(9) connect the suppressor (6), and wherein the terminal block (8) has the inner terminals (5) and is arranged with the suppression board (6) in the housing (2), and wherein the suppression board (6) of a screening hood ( 10) is partially covered, and wherein the Entstörplatine (6) is complete and the Abschirmhaube

(10) are partially embedded in a plastic compound (11), and wherein the plug contacts (3) through the Abschirmhaube (10) through and out of the plastic mass

(11) protrude and the inner terminals (5) of the terminal block (8) are free of plastic compound (11).

2. Shielding device according to claim 1, characterized in that the plug contacts (3) have flat contacts.

3. Shielding device according to claim 1 or claim 2, characterized in that the EMC suppression board (6) is a populated board and flat contacts, conductor tracks (7), a Kunststoffum- injection, a multi-pin terminal block (8) for internal cable connections and Seals for sealing a plug opening (12) in the housing (2).

4. Shielding device according to one of the preceding claims, characterized in that the Abschirmhaube (10) with a metal-laminated side (7) of the suppressor (6) is electrically connected.

5. Shielding device according to one of the preceding claims, characterized in that the electrically conductive connection between Abschirmhaube (10) and Suppressor board (6) has a solder joint, a spring connection or a press connection.

6. Shielding device according to claim 1 or claim 2, characterized in that a receptacle housing (14) surrounds the housing (2) protruding flat contacts and protects, wherein the

Socket housing (14) on a housing wall (15) of is fixed inside out and has for fixing blind holes with threaded bushes (16) and a coding structure as an assembly aid.

7. Shielding device according to one of the preceding claims, characterized in that on the multi-pin terminal block (8) a cable tail is mounted, which leads to Mehrfachsteckverbindungen of the housing (2) arranged circuit boards.

8. Shielding device according to one of the preceding claims, characterized in that the Abschirmhaube (10) has a copper alloy, preferably brass or a stainless steel alloy to prevent contact corrosion with a stainless steel housing.

9. Shielding device according to one of the preceding arrival claims, characterized in that the screening hood (10) with a suppression circuit board (6) is arranged directly on the housing (2).

10. Shielding device according to one of the preceding claims, characterized in that the suppression circuit board (6) has a plurality of layers.

11. Shielding device according to one of the preceding claims, characterized in that a one-sided assembly of the suppression circuit board (6) within the Abschirmhaube (10) is arranged.

12. Shielding device according to one of the preceding claims, characterized in that the one-sided board assembly of the suppression circuit board (6) and the Abschirmhaube (10) are aligned towards the housing.

13. A method for producing a shielding device (1) of a plug connection between a housing (2) and a wiring harness of a vehicle, the method comprising the following method steps:

- Application of plug contacts (3) on a Suppressor board (6) in a peripheral region (9) has a connecting bar (8) for a cable tail and conductor tracks (7), which the plug contacts (3) with the terminal strip ( 8) electrically connect;

- Producing a Abschirmhaube (10) having openings (17) for the plug contacts (3) and with a metal-laminated side (7) of the suppression circuit board (6) is electrically connected; - Fully embedding Entstörplatine (6) and partially embedding the terminal block (8) and the plug contacts (3) and the Abschirmhaube (10) in a plastic compound (11) as protection against moisture (3) and for mechanical stabilization; - Injection molding a socket housing (14) with mounting flange (18), wherein in the mounting flange

(18) threaded pieces (16) are introduced;

- Fix the Entstörplatine (6) with the Abschirmhaube (10) on a metallic inner wall (19) of the housing

(2) in the region of an opening (17) of the housing wall (15), through which the plug contacts (3) of the suppressor (6) protrude outward with simultaneous fixation of the receptacle housing (14) on the outer side (20) of the housing wall ( 15).

14. The method of claim 13, wherein the outside of the housing (2) arranged receptacle housing (14) is provided with a Kodierstruktur and the position of the Steckhül- sengehäuse (14) to the plug contacts (3) is clearly defined.