DE102010029867B4 - electronic assembly - Google Patents

Abstract

Electronic assembly (1), in particular a transmission control, with a printed circuit board (2) which has an opening (4) with a press-in pin (5) received therein, and a module (3), characterized in that the press-in pin (5) with a stamped grid (6), in particular welded, with the module (3) being electrically connected to the press-in pin (5) by means of the stamped grid (6), with the module (3) and the printed circuit board (2) being connected by means of the materially bonded Connection between the press-in pin (5) and the stamped grid (6) are mechanically connected to one another with a freedom of movement in relation to a movement relative to one another.

Description

The present invention relates to an electronic assembly according to the preamble of claim 1, in particular a transmission control.

An electronic assembly of the present type is intended in particular for use in a motor vehicle transmission. Such an electronic assembly comprises a printed circuit board to which one or more modules are contacted, e.g. actuators, plugs, sensors, the printed circuit board being provided, for example, to network control electronics with the modules. A known method for contacting modules with a particularly rigid printed circuit board is, for example, direct bonding of the modules to the printed circuit board. However, this connection is not very secure when used in a transmission, since strong vibrations and temperature changes occur within the transmission, which are associated with tolerances that have a negative effect on the connections.

Relevant prior art can be found in the documents DE 10 2004 053 648 A1 , DE 10 2005 043 413 A1 , DE 199 34 709 A1 , U.S. 2006/0 166 479 A1 and EP 0 740 365 A2 be removed.

Proceeding from this, the present invention is based on the object of proposing an electronic assembly, in particular of a transmission control, in which a module is electrically contacted to a printed circuit board in a cost-effective manner by entering into a fixed connection, with the connection allowing tolerance compensation.

According to the invention, this object is achieved by the features of claim 1 .

According to the invention, an electronic assembly is proposed, in particular a transmission controller, with a printed circuit board, which has an opening with a press-in pin accommodated therein, and a module, the press-in pin being materially connected to a stamped grid, in particular being welded, the module being electrically connected by means of the stamped grid the press-in pin is contacted, the module and the printed circuit board being mechanically connected to one another by means of or as a result of the material connection between the press-in pin and the stamped grid with a freedom of movement, in particular a defined freedom of movement, in relation to a movement relative to one another.

According to the invention, an electronic assembly is also proposed, the module being mechanically connected to the printed circuit board exclusively by means of the integral connection between the press-in pin and the stamped grid.

According to the invention, an electronic assembly is also proposed, the press-in pin being held immovably with a first section in the opening, the press-in pin also having a second section which is materially connected to the stamped grid and can be deflected in a resilient manner.

In an embodiment of the electronic assembly according to the invention, the press-in pin is electrically conductively cold-welded to a wall of the opening.

In a further embodiment of the electronic assembly according to the invention, the stamped grid has a first, inflexibly formed connection area, which rigidly connects the module to the press-in pin.

In yet another embodiment of the electronic assembly according to the invention, the first connection area is formed integrally with the module, in particular a first module part.

According to one aspect of the electronic assembly according to the invention, the stamped grid has a second connection area for electrical contacting, which is designed to be inflexible, and a further area which extends between the first and second connection area and is designed to be flexible.

According to a further aspect of the electronic assembly according to the invention, the area between the first and the second connection area has a spring structure, in particular a meandering or wave-shaped spring structure.

According to yet another aspect of the electronic assembly, the pressed screen has a lower material thickness in the further area than in the first and/or second connection area.

In one embodiment of the electronic assembly according to the invention, the second connection area is formed integrally with a second module part, with the further area extending between the first and the second module part, with the first module part and the second module part having freedom of movement in relation to each other by means of the further area are mechanically connected to a movement relative to each other, in particular electrically conductive. In this case, the first module part or the first connection area is fixed in particular on a carrier element.

In a further embodiment of the electronic assembly according to the invention, the second connection area forms a connection pin of a connector module for the electrical plug connection.

According to the invention, an electronic assembly is also proposed, the module being an assembly of a transmission control, in particular an actuator or a sensor or a plug, which is electrically connected to transmission control electronics by means of the stamped grid and the press-in pin and/or the printed circuit board is a conductor carrier of a transmission control .

According to one aspect of the electronic assembly according to the invention, the printed circuit board has at least one additional opening, in each of which an additional press-in pin is accommodated, the additional press-in pin accommodated in the at least one additional opening being connected in an electrically conductive, materially bonded manner to the stamped grid or an additional stamped grid, wherein the module or additional modules are electrically conductively connected to one or the additional stamped grid in such a way that the printed circuit board can be connected to the and/or one of the additional modules to a Freedom of movement in relation to a movement relative to each other is mechanically firmly connected.

According to another aspect of the electronic assembly according to the invention, the printed circuit board has at least one further opening, in each of which an additional press-in pin is accommodated, the additional press-in pin accommodated in the at least one additional opening being electrically conductively connected to the stamped grid or an additional stamped grid in a materially bonded manner. wherein the module or additional modules are electrically conductively connected to the one or the additional stamped grid in such a way that the printed circuit board is connected to the and/or one of the additional modules exclusively by means of the materially bonded connection of the one or the additional press-in pins and the one or the additional stamped grid mechanically connected.

Further features and advantages of the invention result from the following description of exemplary embodiments of the invention, with reference to the figures of the drawings, which show details essential to the invention, and from the claims. The individual features can each be implemented individually or together in any combination in a variant of the invention.

• 1 exemplarisch eine elektronische Baugruppe gemäß einer möglichen Ausführungsform der Erfindung;
• 2 exemplarisch einen Einpresspin in einer Öffnung der Leiterplatte gemäß einer möglichen Ausführungsform der Erfindung; und
• 3 exemplarisch eine elektronische Baugruppe gemäß einer weiteren möglichen Ausführungsform der Erfindung.

Preferred embodiments of the invention are explained in more detail below with reference to the accompanying drawings. Show it:

• 1 an example of an electronic assembly according to a possible embodiment of the invention;
• 2 exemplarily a press-in pin in an opening of the printed circuit board according to a possible embodiment of the invention; and
• 3 an example of an electronic assembly according to a further possible embodiment of the invention.

In the following description and the drawings, the same reference symbols correspond to elements with the same or comparable function.

1 shows an example of an electronic assembly 1 according to the invention. The electronic assembly 1 is in particular a component of a transmission control of a motor vehicle, for example a component of an integrated mechatronic transmission control. The electronic assembly 1 is accommodated, for example, in the oil sump of a transmission of a motor vehicle and is regularly exposed there to vibrations and temperature fluctuations during operation, for example.

The electronic assembly 1 has a circuit board 2, in particular a multi-layer circuit board 2. The circuit board 2 consists of a carrier material, in particular a high-temperature-resistant carrier material such as FR4, or generally glass fiber material and epoxy resin, and at least one conductor layer arranged thereon, e.g. at least one conductor track. The printed circuit board 2 is in particular a rigid printed circuit board 2 which, according to the invention, is intended to network electronics with a module 3 . The electronics are, for example, control electronics of a transmission control.

According to the invention, a module 3, in particular an electrical or electronic module, in particular, for example, an assembly of a transmission control, e.g. an actuator, a connector or e.g. a sensor, is electrically connected to the printed circuit board 2 or contacted thereon. The module 3 and the printed circuit board 2 are accommodated, for example, on a common carrier or a carrier substrate, e.g. a component carrier of a transmission control. The module 3 and the printed circuit board 2 can, for example, be accommodated on different carriers or carrier substrates. It is also conceivable, for example, that only the printed circuit board 2 is accommodated or fixed on a carrier or carrier substrate.

The printed circuit board 2 has an opening 4 for contacting the module 3, 2 , eg a through hole. The opening 4 extends, for example, from one broad side 2a or 2b in the direction of the opposite broad side 2b or 2a of the printed circuit board 2, ie in the Y direction. 1 . The opening 4 has, for example, a circular cross section. A wall 4a of the opening 4 is designed to be electrically conductive for the purpose of electrically contacting the module 3 and is electrically contacted to a conductor layer or a conductor track of the printed circuit board 2 . The opening 4 is formed, for example, as a plated-through hole, the wall 4a of which is metallically coated, for example, is copper-plated. It is also conceivable to design the opening 4 as a blind hole.

For permanent electrical contacting of the module 3 to the printed circuit board 2, a press-in pin 5 is accommodated or pressed into the opening 4, which is manufactured with a slight oversize in relation to the opening cross-section, for example. In this respect, the press-in pin 5 forms a fixed mechanical connection with the printed circuit board 2 . The press-in pin 5 is designed to be electrically conductive and is permanently electrically contacted to the wall 4a as a result of the press fit. The press-in pin 5 is, for example, rod-shaped or pin-shaped.

The press-in pin 5 is preferably cold-welded to the wall 4a of the opening 4, for example, as a result of being pressed in. For this purpose, the press-in pin 5 is made, for example, from the same material as a metalized layer of the wall 4a. The wall 4a and the press-in pin 5 each have a high surface quality, for example, so that the large number of touching atoms combine to form a stable atomic lattice. This cannot easily be separated without destructive intervention.

In order to achieve a permanent, fixed mechanical connection of the module 3 to the printed circuit board 2, which also opens up freedom of movement or allows tolerance compensation, according to the invention a stamped grid 6 is materially attached to the press-in pin 5, in particular welded to it, e.g. by means of laser welding or e.g. resistance welding, reference number 7. It should be noted here that the term stamped grid is chosen here to designate a conductor element which is produced from a metal strip using a stamped grid production process.

Such a stamped grid 6 or conductor element is a flat conductor structure produced by stamping, e.g. a strip-shaped conductor, with such a conductor structure being able to be formed as a single conductor track. The module 3 is electrically connected to the press-in pin 5 or the printed circuit board 2 by means of the stamped grid 6, the stamped grid 6 being e.g. in particular mechanically firmly connected to the module 3, e.g. being formed integrally therewith. The stamped grid 6 forms in particular an electrical connection of the module 3.

For example, a free end of stamped grid 6 and press-fit pin 5 ( 1 , 3 ), wherein the press-in pin 5 protrudes in particular from the printed circuit board 2 to enter into the material connection, ie with its end that is not accommodated in the opening 4 and is therefore free. Such a fixed or rigid, permanent connection also withstands strong vibrations, for example.

Furthermore, by means of or as a result of the materially bonded connection of leadframe 6 and press-in pin 5 according to the invention, tolerance compensation is possible, i.e. the module 3 can be provided with a, in particular defined, freedom of movement in relation to a movement relative to the printed circuit board 2 can be electrically contacted to the printed circuit board 2 and mechanically connected thereto. In particular, a tolerance within which an unimpeded movement is provided is referred to as freedom of movement. It is provided, for example, that the module 3 is mechanically connected to the printed circuit board 2 exclusively by means of the material connection between the press-in pin 5 and the stamped grid 6. This can be the case, for example, if the module 3 is accommodated or arranged on a carrier element that is separate from a carrier element of the printed circuit board 2, or the module 3 is possibly carried exclusively by the connection of leadframe 6 with press-in pin 5.

In order to allow freedom of movement in relation to a movement of module 3 and printed circuit board 2 relative to one another, a first section 5a of press-in pin 5 is accommodated in opening 4, in particular arranged immovably in opening 4 or pressed in, in particular gas-tight, while a second Section 5b, by means of which the press-in pin 5 is integrally connected to the stamped grid 6, can be deflected in a resilient manner, in particular with a defined freedom of movement. A deflection refers to bringing the second section 5b out of an initial or rest position ( 1 , 3 ). Such an initial position is in particular a position in which the stamped grid 6 does not work against the press-in pin 5, e.g. a tolerance-free position of the press-in pin 5 or the stamped grid 6 connected to it.

A deflection of the second section 5b (double arrow in 1 ) takes place, for example, due to the press-in pins 5 being loaded by the stamped grid 6 as a result of vibration or a temperature-related linear expansion. By deflecting, ent speaking, for example, of a movement on a circular arc-shaped trajectory, tolerance compensation can take place in particular in the horizontal direction, for example in the X direction and/or Z direction.

The second section 5b can be formed, for example, by the free end of the press-in pin 5 or by a section remote from the first section 5a. The press-in pin 5 can be designed to form a deflectable second section 5b, for example, at least partially spring-elastic or flexible ( 2 ). A freedom of movement can be defined by selecting a suitable material, ie, for example, a material with a suitable modulus of elasticity.

According to the invention, the freedom of movement can also be specified, for example, by specifically selecting the distance from the first section 5a to the second section 5b, corresponding to the length of the press-in pin 5, for example. As a result of choosing a large distance between the first 5a and second 5b section, a large freedom of movement can be specified, i.e. large relative movements are compensated for, with a small distance, a small freedom of movement can be achieved, in each case based on a press-in pin 5 of the same elasticity.

According to the invention, it is provided that a freedom of movement or a tolerance compensation option is set only by means of the press-in pin 5 . For this purpose, the stamped grid 6 has a first, inflexible or rigid connection area 6a which creates an electrical and mechanical connection between the module 3 and the press-in pin 5 . In the context of the invention, the first connection area 6a extends from one end of the stamped grid 6, which is materially connected to the press-in pin 5, to the module 3.

It is also conceivable according to the invention to specify a freedom of movement by means of the stamped grid 6 and/or the press-in pin 5 . For this purpose, the stamped grid 6 can be made elastic or partially elastic, for example. For example, the first connection area 6a is at least partially elastic in this case. The first connection area 6a is designed, for example, as a spring structure.

3 shows an embodiment of the invention which opens up two, in particular defined, freedoms of movement by means of the press-in pin 5 and the stamped grid 6, as a result of which the compensation of different tolerances is made possible. The module 3, in particular a connector module, is formed by means of two module parts 3a, 3b integrally connected by the stamped grid 6, with a first module part 3a integrally formed with the stamped grid 6 being fixed to a carrier element 8, e.g. by means of a housing 9, wherein a particularly defined, first freedom of movement between the first module part 3a and the circuit board 2 is provided. The first module part 3a is formed integrally with the first connection area 6a, which in particular enables a rigid connection to the press-in pin 5.

When the carrier element 8 or the first module part 3a and the circuit board 2 move relative to each other, the second section 5b, which is materially connected to the first, rigid connection area 6a, can be deflected under load by the stamped grid 6 and thus due to the particularly elastic Press-in pin 5 given freedom of movement allow tolerance compensation.

Furthermore, the module 3 has a second module part 3b, which is formed integrally with a second, likewise inflexible connection area 6b of the stamped grid 6. 3 . The second connection area 6b forms, for example, according to 3 a connection pin 10 of an electrical connector arrangement, in particular of the module 3 in the form of a connector module. The second connection area 6b extends, for example, from a further end of the stamped grid 6 through a plug housing 11 of the second module part 3b.

The second module part 3b is connected to the first module part 3a by means of the pressed screen 6 to form a common module 3 . In particular, the first module part 3a can be moved by means of the stamped grid 6 with an, in particular defined, freedom of movement relative to the second module part 3b, which is not fixed to the carrier element 8 . In order to give the second connection area 6b or the second module part 3b in the jointly formed module 3 freedom of movement or the possibility of tolerance compensation with respect to the first module part 3a, the pressed screen 6 has a central area or an additional area 6c, which is located between the first 6a and is formed with the second 6b connection area, in particular integrally therewith, in such a way that the first module part 3a and the second module part 3b are mechanically connected to one another. The further area 6c is flexible, in particular in such a way that the intended freedom of movement is given, e.g. by suitable shaping of the further area 6c or by suitable material thickness.

For example, the material of the further area 6c can have a lower thickness than the material of the first 6a and/or second 6b connection area. The further area 6c is arranged in particular between the first 6a and the second 6b module part in such a way that unimpeded movement with the specified freedom of movement is possible. For arrangement in a transmission oil sump or for electrical insulation the stamped grid 6 or at least the further area 6c is injection molded with a suitable material, for example a plastic.

According to the invention, it is provided, for example, to design the further area as a spring structure, i.e. e.g. as an accordion structure, e.g. as a meandering or wavy or jagged spring structure. By selecting a suitable spring structure, for example, the freedom of movement of the module 3 relative to the carrier element 8 or the possibility of tolerance compensation can be defined or specified.

According to the invention, it is provided, for example, that the connection of the stamped grid 6 with the press-in pin 5 allows a freedom of movement of max second module part 3b with respect to a movement relative to the first module part of +/- 1 mm.

According to the invention, it is provided that one or any number of press-fit pins 5 accommodated in an opening 4 can be materially connected to one or any number of stamped grids 6 . It is also provided that one or any number of the above-mentioned pressed screens 6 can be electrically conductively connected to one or any number of modules 3 in such a way that one or more of the above-mentioned modules 3 and the printed circuit board 2 can be moved by means of the integral connection with freedom of movement in Reference to a movement relative to each other are mechanically connected to each other.

It is provided in particular that the printed circuit board 2 is mechanically connected to one and/or more of the above-mentioned modules 3 exclusively by means of the integral connection of one or more of the above-mentioned press-in pins 5 and one or more above-mentioned pressed screens 6 .

reference list

1

electronic assembly

2

circuit board

2a, 2b

broadside

3

module

3a

first module part

3b

second module part

4

opening

5

press-in pin

5a

first section

5b

second part

6

punched grid

6a

first connection area

6b

second connection area

6c

further area

7

welded joint

8th

carrier element

9

Housing

10

connection pin

11

connector housing

X,Y,Z

directions

Claims (14)

Electronic assembly (1), in particular a transmission control, with a printed circuit board (2) which has an opening (4) with a press-in pin (5) received therein, and a module (3), characterized in that the press-in pin (5) with a stamped grid (6), in particular welded, with the module (3) being electrically connected to the press-in pin (5) by means of the stamped grid (6), with the module (3) and the printed circuit board (2) being connected by means of the materially bonded Connection between the press-in pin (5) and the stamped grid (6) are mechanically connected to one another with a freedom of movement in relation to a movement relative to one another. Electronic assembly (1) after claim 1 , characterized in that the module (3) is mechanically connected to the printed circuit board (2) exclusively by means of the integral connection between the press-in pin (5) and the stamped grid (6). Electronic assembly (1) according to one of the preceding claims, characterized in that the press-in pin (5) is received immovably with a first section (5a) in the opening (4), the press-in pin (5) also having a second section (5b) has which is integrally connected to the stamped grid (6) and can be deflected in a resilient manner. Electronic assembly (1) according to one of the preceding claims, characterized in that the press-in pin (5) is electrically conductively cold-welded to a wall (4a) of the opening (4). Electronic assembly (1) according to one of the preceding claims, characterized in that the stamped grid (6) has a first, inflexibly formed connection area (6a). has, which rigidly connects the module (3) to the press-in pin (5). Electronic assembly (1) according to one of the preceding claims, characterized in that the first connection area (6a) is formed integrally with the module (3), in particular a first module part (3a). Electronic assembly (1) according to one of the preceding claims, characterized in that the stamped grid (6) has a second connection area (6b) for electrical contacting, which is designed to be inflexible, and a connection area located between the first (6a) and second (6b). extending further area (6c), which is flexible. Electronic assembly (1) after claim 7 , characterized in that the further area (6c) between the first (6a) and the second (6b) connection area has a spring structure, in particular a meandering or wave-shaped spring structure. Electronic assembly (1) according to one of Claims 7 until 8th , characterized in that the stamped grid (6) in the further area (6c) has a lower material thickness than in the first (6a) and/or second (6b) connection area. Electronic assembly (1) according to one of Claims 7 until 9 , characterized in that the second (6b) connection area is formed integrally with a second module part (3b), the further area (6c) extending between the first (3a) and the second (3b) module part, the first module part ( 3a) and the second module part (3b) are mechanically connected to one another by means of the further area (6c) with a freedom of movement in relation to a movement relative to one another. Electronic assembly (1) according to one of Claims 7 until 10 , characterized in that the second connection area (6b) forms a connection pin (10) of a connector module for electrical plug connection. Electronic subassembly (1) according to one of the preceding claims, characterized in that the module (3) is a subassembly of a transmission control, in particular an actuator or a sensor or a plug, which is connected to transmission control electronics by means of the stamped grid (6) and the press-in pin ( 5) is electrically connected and/or the printed circuit board (2) is a conductor carrier of a transmission control. Electronic assembly (1) according to one of the preceding claims, characterized in that the printed circuit board (2) has at least one further opening (4), in each of which an additional press-in pin (5) is accommodated, the in the at least one further opening ( 4) the additional press-in pin (5) accommodated is electrically conductively connected to the lead frame (6) or an additional lead frame (6), the module (3) or additional modules (3) being electrically connected to the one or the additional lead frame (6). are conductively connected in such a way that the printed circuit board (2) has freedom of movement by means of the integral connection of one or more press-in pins (5) and one or more additional stamped grids (6) to the and/or one of the additional modules (3). are mechanically interconnected with respect to movement relative to each other. Electronic assembly (1) according to one of the preceding claims, characterized in that the printed circuit board (2) has at least one further opening (4), in each of which an additional press-in pin (5) is accommodated, the in the at least one further opening ( 4) the additional press-in pin (5) accommodated is electrically conductively connected to the lead frame (6) or an additional lead frame (6), the module (3) or additional modules (3) being electrically connected to the one or the additional lead frame (6). are conductively connected in such a way that the printed circuit board (2) is mechanically connected to the and/or one of the additional modules (3) exclusively by means of the integral connection of one or more press-in pins (5) and one or more additional pressed screens (6). is.

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