DE202015008007U1 - Printed circuit board assembly - Google Patents

Abstract

Printed circuit board assembly having at least two printed circuit boards, which are arranged approximately perpendicular to each other in the assembled state and electrically and mechanically connected to each other, wherein a first circuit board (1) has pads (3) adapted to receive contact extensions (4) of a second circuit board (2) characterized in that at least a portion of the contact extensions (4) is provided with electrically conductive contact surfaces (5) and the contact surfaces (5) cover only a portion of the contact extensions (4) and spaced their edges from the edges of the contact extensions (4) are arranged.

Description

The invention relates to a printed circuit board assembly having at least two printed circuit boards, which are arranged in the mounted state approximately at right angles to each other and electrically and mechanically connected to each other, wherein a first printed circuit board ( 1 ) Has pads, which for receiving contact extensions of a second printed circuit board ( 2 ) are formed.

Circuit boards are included in almost all electronic devices. They serve as a carrier for electronic components and the electrical connection thereof.

Typically, they are made of electrically insulating material having conductive interconnects (traces) adhered thereto. As insulating material fiber reinforced plastic is common. The tracks are usually etched from a thin layer of copper. The components are soldered to pads or pads. So they are simultaneously mechanically held and electrically connected. Larger components can also be attached to the printed circuit board using cable ties, adhesive or screwed connections.

To adapt the space requirement of an electronic circuit to given device dimensions, it is common to provide a plurality of electrically and mechanically interconnected printed circuit boards, so as to reduce the areal extent of a single circuit board and instead use available space in height.

The circuit boards can be connected to each other, for example via plug contacts or sockets.

From the DE 10 2011 103 777 A1 the connection of a first and a second printed circuit board is known, wherein the first printed circuit board carries on its upper side a contact having two mutually facing and a receiving gap forming arms for receiving a contact portion of the second printed circuit board, and the second printed circuit board, a contact portion with at least one Contact field, wherein the contact portion of the second circuit board is arranged in the receiving gap between the arms of the first circuit board and at least one arm rests as a contact arm on the contact pad of the second circuit board.

The invention has for its object to further develop the state of the art.

According to the invention, this is done with a printed circuit board assembly of the type mentioned, in which at least part of the contact extensions is provided with electrically conductive contact surfaces and the contact surfaces cover only a portion of the contact extensions and their edges are spaced from the edges of the contact extensions.

By the invention electrically conductive connections between contact surfaces and pads are avoided without proper solder connection and thus turned off a source of error.

It is advantageous if the distance between the edges of the contact surfaces and the edges of the contact extensions is at least 0.5 mm.

It is also favorable if, in addition to the second printed circuit board, further printed circuit boards are arranged approximately at right angles to the first printed circuit board and are electrically and mechanically connected thereto.

Thus, given space offers can be optimally used.

In a further advantageous embodiment, at least a portion of the pads, which are formed to receive contact extensions of a second printed circuit board, provided with a Spaltfräsung.

It is also favorable if the circuit boards have additional electrical connection elements. Thus, an increased demand for electrical connections can be covered.

The invention will be explained in more detail with reference to figures. They show by way of example:

1 an exploded view of an embodiment of the circuit board assembly according to the invention and

2 a section of the second circuit board according to the invention.

2 shows a printed circuit board assembly with a first circuit board 1 and a second circuit board 2 which are arranged in the assembled state approximately at right angles to each other and to be electrically and mechanically connected to each other.

Thus, the areal extent of the first circuit board is reduced and adapted to the space requirement of the entire circuit board assembly to an existing space.

This adaptation can also be optimized by further printed circuit boards perpendicular to the first printed circuit board 1 arranged and with this electrically and mechanically connected. It would also be conceivable, however, for further printed circuit boards to be perpendicular to the second printed circuit board 2 be arranged and connected to this electrically and mechanically, and thus parallel to the surface of the first circuit board 1 lie.

The connection of the circuit boards can be done at least partially by means of connectors. This will preferably be the case when separability of the printed circuit boards is required.

But the invention is based on a compound in which the first circuit board 1 pads 3 having, for receiving contact extensions 4 the second circuit board 2 are formed.

During assembly, the second circuit board 2 attached to the first circuit board, so that after completion of the insertion process, the contact extensions 4 through the corresponding pads 3 the first circuit board 1 protrude.

Thereafter, as part of the soldering process, the pads 3 with the on the contact processes 4 arranged, electrically conductive contact surfaces 5 soldered and so completed the electrical and mechanical connection of the two circuit boards.

Subsequently, in a test field, the printed circuit board is checked in particular to see whether the electrical contacts are made without errors and the conductivity is given.

This may result in compounds with contact extensions and contact surfaces according to the prior art to erroneous results, although a soldering in one case has not been performed properly, but the contact surface on a conductive inner wall of a Lötauges 3 is applied. In this case, the conductivity of the connection is given and it is recognized as error-free.

In the case of a mechanical / thermal load, however, this contact can be interrupted and thus the functionality of the printed circuit board arrangement or of the electrical or electronic device realized with it can no longer be given. The underlying error may then be very difficult to determine.

According to the invention is now a concern of the contact surface 5 on a conductive inner wall of a Lötauges 3 This prevents the contact surfaces 5 only part of the contact processes 4 cover and their edges to the edges of the contact processes 4 have a minimum distance, which may be, for example, 0.5 mm.

This prevents the possibility of error described above.

It is also advantageous if at least a portion of the pads 3 , which are used to accommodate contact processes 4 a second circuit board 2 are formed, provided with a Spaltfräsung.

This gap cut formed in the direction of the extent of the second printed circuit board serves to receive one not from a contact surface 5 covered part of a contact extension.

The Spaltfräsung can therefore form a guide with the contact extension, which forms no unwanted electrical contact, but allows a fixation of the circuit boards to each other before the soldering.

The inventive solution for connecting multiple circuit boards can also be used with other connection options such. B. Combine cables and connectors.

LIST OF REFERENCE NUMBERS

1

first circuit board

2

second circuit board

3

pads

4

Contact projections

5

contact area

6

Spaltfräsung

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102011103777 A1 [0006]

Claims (5)

Circuit board arrangement with at least two printed circuit boards, which are arranged in the mounted state approximately at right angles to each other and electrically and mechanically connected to each other, wherein a first printed circuit board ( 1 ) Pads ( 3 ), which are suitable for receiving contact extensions ( 4 ) a second circuit board ( 2 ), characterized in that at least a part of the contact extensions ( 4 ) with electrically conductive contact surfaces ( 5 ) and the contact surfaces ( 5 ) only a part of the contact processes ( 4 ) and cover their edges from the edges of the contact processes ( 4 ) are arranged at a distance. Circuit board assembly according to claim 1, characterized in that the distance between the edges of the contact surfaces ( 5 ) and the edges of the contact processes ( 4 ) is at least 0.5 mm. Circuit board arrangement according to claim 1 or 2, characterized in that in addition to the second printed circuit board ( 2 ) further printed circuit boards approximately at right angles to the first printed circuit board ( 1 ) are arranged and electrically and mechanically connected thereto. Circuit board arrangement according to one of claims 1 to 3, characterized in that at least a part of the pads ( 3 ) used to accommodate contact processes ( 4 ) a second circuit board ( 2 ), is provided with a Spaltfräsung. Printed circuit board assembly according to one of claims 1 to 4, characterized in that the circuit boards have additional electrical connection elements.

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