DE102015201992A1 - Arrangement for the solderless contacting of printed circuit boards - Google Patents

Abstract

The invention relates to an arrangement (1) comprising a printed circuit board (2) with at least one contact point (3), which is connected to at least one printed conductor (4) of the printed circuit board (2), and a contact element (6) for solderless contacting of the contact point (3). 3) According to the invention it is provided that for producing a press-in connection with the printed circuit board (2), the contact element is a press-in contact (6), and the contact point (3) as from the edge (2.1) of the printed circuit board (2) outgoing contact slot (3.1) with a formed with the conductor track (4) metallization (4.1), wherein the press-in contact (6) in a horizontal position with respect to the printed circuit board (2) perpendicular to the same in the contact slot (3.1) is pressed and horizontally to the circuit board (2) extends beyond the edge (2.1) addition. The invention further relates to a circuit board and a press-in contact for realizing the arrangement according to the invention.

Description

The invention relates to an arrangement for solderless contacting of printed circuit boards by means of press-fit contacts according to the preamble of claim 1. Furthermore, the invention relates to a printed circuit board and a press-fit for realizing the arrangement according to the invention.

The press-fit technology is a process for the solderless contacting of printed circuit boards. The press-fit contact has a deformable or solid press-in section. The press-in section has an excess in relation to the press-fitted hole provided with a metallization in the printed circuit board, so that the press-fit contact can be pressed into the press-in hole with mechanical force and an electrical contact is produced by an elastic deformation of the press-fit section. A contact element for pressing into a press-in bore of a printed circuit board is, for example. From the DE 10 2004 015 431 A1 known.

Such press-in contacts are pressed perpendicular to the printed circuit board in the injection bore, so that there is a gas-tight connection between the circuit board and the press-fit. Such a press-in connection is advantageous if the components to be connected are arranged perpendicular to one another. In the case of vertical alignment of the components to be contacted, the press-in contact must be U-shaped to produce the press-in connection. For this purpose, however, a larger space is required.

It is therefore an object of the invention to provide an arrangement of the type mentioned, which has a structurally simple structure without the o. G. Disadvantage. It is another object of the invention to provide a printed circuit board and a press-fit for realizing the inventive arrangement.

The first object is achieved by an arrangement having the features of patent claim 1.

Such an arrangement of a printed circuit board having at least one contact point, which is connected to at least one conductor track of the printed circuit board, and having a contact element for solderless contacting of the contact point is characterized according to the invention in that the contact element is a press-fit contact for producing a press-fit connection with the printed circuit board. and the contact pad is formed as a contact slot extending from the edge of the printed circuit board with a metallization connected to the printed conductor, wherein the press-in contact is pressed into the contact slot in a horizontal position with respect to the printed circuit board perpendicular thereto and extends horizontally to the printed circuit board beyond its edge.

In this arrangement according to the invention, the press-in contact is pressed into a peripheral contact slot of the printed circuit board and oriented horizontally to the circuit board. To produce the press-in connection of the press-in contact with the printed circuit board, the press-in contact is pressed from a position in which its longitudinal axis is horizontal to the printed circuit board with a perpendicular to the printed circuit oriented insertion in the contact slot, so that the press-in contact with its longitudinal axis horizontally to the circuit board on the Edge extends out.

Advantageously, according to one embodiment of the invention, the press-in contact is formed with a deformable press-fit section and a connection section, wherein the press-fit section has a greater thickness than the width of the contact slot. The thickness of the press-in section refers to the outer distance of the opposite bulges in the region of their maximum elevation over the respective surface.

Furthermore, according to a development of the invention, the contact slot has two slot walls extending parallel to one another with the metallization, wherein the metallization forms an electrical contact with the press-in section of the press-fit contact. Such a contact slot is easy to produce and preferably runs perpendicular to the edge of the circuit board. Of course, it is also possible to produce such a contact slot with an oblique course to the edge of the circuit board.

According to training, the press-in contact is designed as a flat profile with a rectangular cross-section and therefore it is also produced inexpensively.

It is particularly advantageous according to one embodiment of the invention, when the press-in portion of the press-in contact is arranged with at least two on opposite surfaces of the press-in contact and each protruding from the surfaces protrusions, wherein the bulges form a resilient contact with the metallization of the contact slot. Preferably, the bulges are formed as extending transversely to the longitudinal axis of the press-fit webs. Such webs can be produced in a simple manner by stamping.

A simple embodiment of the invention provides that the press-in contact on a surface with two lobes and on the opposite surface is formed with a bulge. Preferably, two bulges can also be generated on both opposite surfaces, whereby a high stability of the pressed-in press-fit contact is achieved.

The webs of the press-in portion of the press-in contact are formed with a transversely to the longitudinal direction of the press-in contact arcuate contour. With this rounded shape of the webs of the press-in section, the press-in contact can be inserted or pressed into the contact slot so as to be secure against assembly. According to training other contours are realized, such as. Truncated cone or spherical layer extending contours. These contours have the advantage that a flat surface of the web is present to form the contact with the metallization of the contact slot.

A further advantageous development of the invention provides that the connection section is formed with a contact region for contacting the press-fit contact, which is connected to the press-in section via a holding region embedded in a housing section. Such a housing section may represent a part of a housing or a socket element, wherein the contact area is used for contacting the press-in contact. For this purpose, the press-fit can be pressed into such a housing or molded around for the production of the housing.

The second object is achieved by a printed circuit board having the features of claim 11.

Such a printed circuit board with at least one contact point connected to at least one printed conductor is characterized in that, for the purpose of producing a press-in connection with a press-in contact, the contact point is formed as a contact slot extending from the edge of the printed circuit board with a metallization connected to the printed conductor, such that the press-in contact Reference to its longitudinal axis horizontally to the circuit board in the contact slot can be pressed.

Such a circuit board is easy to manufacture, since the contact slot extends from the edge of the circuit board. It makes sense to realize such a contact slot with a course perpendicular to the edge of the circuit board. In addition, it is also possible to orient the contact slot obliquely to the edge of the circuit board.

Preferably, the contact slot on two parallel slot walls with the metallization. Thus, the pressed-press-in contact is held functionally reliable in the contact slot.

The third object is achieved by a press-fit with the features of claim 13.

Such a press-in contact for producing a press-in connection with a metalized recess having a contact point of a printed circuit board, wherein the press-in contact is formed with a press-fit into the recess and deformable press-fit and a connection portion, according to the invention is characterized in that for pressing the press-fit into the formed as edge-side contact slot recess of Einpressabschnitt arranged on opposite surfaces of the press-fit and each protruding from the surfaces protrusions is formed such that the press-in contact in a horizontal position with respect to the circuit board perpendicular to the same in the contact slot to form a resilient contact with the metallization the contact slot is pressed.

To produce the press-in connection of the press-in contact with the printed circuit board, the press-in contact is pressed from a position in which its longitudinal axis is horizontal to the printed circuit board with a perpendicular to the printed circuit oriented insertion in the contact slot, so that the press-in contact with its longitudinal axis horizontally to the circuit board on the Edge extends out. Preferably, the bulges are formed as extending transversely to the longitudinal axis of the press-in contact webs, which are produced in a simple manner by punching.

According to a most advanced embodiment of the invention, the press-in contact is designed as a flat profile with a rectangular cross-section. Preferably, the press-fit is formed on a surface with two lobes and on the opposite surface with a bulge, preferably also with two lobes. This achieves a stable position of the press-fit contact pressed into the contact slot.

In order to facilitate the insertion of the press-in contact in the contact slot, the webs of the press-in section are formed with a transversely to the longitudinal axis of the press-in contact arcuate contour in the insertion direction. According to training other contours are realized, such as. Truncated cone or spherical layer extending contours. These contours have the advantage that a flat surface of the web is present to form the contact with the metallization of the contact slot.

The invention will be explained in more detail with reference to the accompanying figures. Show it:

1 a perspective top view of an inventive arrangement of a printed circuit board in detail and a pressed into a contact slot of the printed circuit board press-in,

2 a perspective side view of the inventive arrangement according to 1 with a housing part,

3 a sectional view of the section II of the inventive arrangement according to 2 , and

4 a perspective view of a press-in contact of the arrangement according to the 1 and 2 ,

The 1 and 2 show an oriented in an xy plane PCB 2 with a peripheral contact slot 3.1 , in the one press-in contact 6 is pressed.

This contact slot 3.1 forms a contact point 3 a trace 4 the circuit board 2 , where the conductor track 4 in a metallization 4.1 the inner wall of the contact slot 3.1 passes. The contact slot 3.1 is made up of two parallel slot walls 3.11 formed so that the contact slot 3.1 perpendicular to the edge 2.1 the circuit board 2 runs. The two diaphragm walls 3.11 are connected at the end of the slot with a circular contour. As a metallization 4.1 for the contact slot 3.1 as well as for the conductor track 4 usually copper is used.

Like from the 1 . 2 and 3 it can be seen, there is the press-in 6 from a flat profile with rectangular cross-section and has various sections. The press-in contact begins on the circuit board side 6 with a press-fit section 7 to which a connection section 8th followed.

The press-fit section 7 gets into the contact slot 3.1 from a position in which the longitudinal axis L of the press-fit 6 horizontal to the PCB 2 runs, in the insertion direction R perpendicular to the circuit board 2 introduced. These are on opposite surfaces of the flat profile or the press-fit 6 transverse to the longitudinal axis L extending webs 7.1 . 7.2 and 7.3 formed as bulges in the contact slot 3.1 Pressed state of the press-fit 6 an electrical contact with the metallization 4.1 the slot walls 3.11 form. In the pressed-in state of the press-fit contact 6 passes through the flat profile of the press-fit 6 formed plane perpendicular to the circuit board 2 , ie in the z direction. This z-direction also represents the insertion direction R, ie that the press-fit 6 in a direction perpendicular to the circuit board 2 standing position of the flat profile horizontally in the insertion direction R in the contact slot 3.1 is introduced.

The connection section 8th of the press-fit 6 starts at its free end with a contact area 9 , for contacting the press-fit 6 serves. At this contact area 9 closes a holding area 10 on, which has a connection area 11 in the press-fit section 7 passes. By means of the holding area 10 becomes the press-fit contact 6 for example in a housing part 5 fixed, as shown schematically in 2 is indicated. The fixation of the press-fit contact 6 in this housing part 5 is done either by pressing in the press-fit 6 in this housing part 5 or by encapsulation of the holding area 10 for the production of the housing part 5 , This housing part 5 is part of a housing for receiving the circuit board 2 or a part of a socket used to make contact with the contact area 9 of the press-fit 6 serves.

The bridges 7.1 . 7.2 and 7.3 be off a center with respect to the z-direction on the press-fit section 7 arranged edge windows 7.0 formed by a punching process, so that the resulting webs spaced and linearly the window 7.0 perpendicular to the PCB 2 or perpendicular to the longitudinal axis L (z-direction) bridge. This is the bridge 7.1 between the two bridges 7.2 and 7.3 , where the bridge 7.3 at the edge at the end of the press-in section 7 runs. The jetty 7.3 can also with the formation of a small paragraph in the direction of the connection section 8th of the press-fit 6 be offset to a burr created during punching at the end of Einpressabschnittes 7 to avoid. Such a burr could when pressing the press-fit 6 the metallization 4.1 inadvertently damage.

Subsequently, these webs 7.1 . 7.2 and 7.3 arcuate from the plane of the flat profile of the press-fit 6 , ie bent out perpendicular to the longitudinal axis L, wherein a web 7.1 from the surface 6.1 and on the opposite surface 6.2 the two bridges 7.2 and 7.3 be bent out while doing these bars 7.1 . 7.2 and 7.3 are elastic. In the area of the maximum curvature of the webs 7.1 . 7.2 and 7.3 from the surfaces 6.1 and 6.2 this results in a thickness D of the press-in section 7 of the press-fit 6 facing the width B of the contact slot 3.1 has an oversize such that the properties required for a press-fit connection can be realized.

With a so-realized press-fit 7 becomes the press-fit contact 6 in a horizontal position with respect to the printed circuit board 2 in the insertion direction R in the contact slot 3.1 Pressed so that according to the sectional view 3 the footbridges 7.1 . 7.2 and 7.3 in the region of their maximum curvature related in the z-direction, the metallization 4.1 deform and it thereby to a gas-tight electrical connection between the press-fit 6 and the metallization 4.1 and therefore also with the conductor track 4 comes. To insert the press-in contact 6 in the contact slot 3.1 To facilitate, are the webs 7.1 . 7.2 and 7.3 in the insertion direction R with an arcuate contour 7.11 . 7.21 and 7.31 executed. So that the press-in contact 6 in the insertion direction R first so far into the contact slot 3.1 be introduced until the outer spacing of the contours 7.11 . 7.21 7.31 the width B of the contact slot 3.1 equivalent. Then begins the press-in process, in which the metallization 4.1 is deformed. The press-in process is completed when the press-in section 7 a symmetrical position to the thickness of the circuit board 2 has reached. In this situation according to the 1 and 2 dominates the Einpressabschnitt 7 slightly the two surfaces of the circuit board 2 ,

From the cross-sectional view according to 3 it can be seen that the metallization 4.1 adjacent surfaces of the webs 7.1 . 7.2 and 7.3 are contoured in the direction of the longitudinal axis L an arcuate.

The contours 7.11 . 7.21 and 7.31 of the bridges 7.1 . 7.2 and 7.3 can also have a different course than the described arcuate course perpendicular to the longitudinal axis L. Thus, all possible combinations of advice the transitions, bevels and the flat profile parallel sections with flat surfaces can be realized. In particular, contours, such as, for example, frustoconical or spherical layer-shaped contours are suitable. These contours have the advantage that to form contact with the metallization 4.1 the contact slot 6 a flat surface of the bridge 7.1 . 7.2 respectively. 7.3 is available.

In the embodiment according to the 1 to 4 is on a surface 6.1 of the press-fit 6 only one jetty 7.1 intended. It is advantageous for reasons of stability, also on this side of the press-fit 6 to realize two bars as well.

As already stated above, the press-in contact 6 in a housing part 5 a housing fixed by pressing or by molding. Subsequently, the circuit board by means of the contact slot 3.1 on the press-in section 7 of the press-fit 6 pressed on.

LIST OF REFERENCE NUMBERS

1

 arrangement

2

 circuit board

2.1

Edge of the circuit board 2

3

Contact point of the circuit board 2

3.1

 contact slot

3.11

Slit wall of the contact slot 3.1

4

Trace of the circuit board 2

4.1

Metallization of the contact point 3

5

 housing section

6

 press-fit

6.1

Surface of the press-fit contact 6

6.2

Surface of the press-fit contact 6

7

Press-in section of the press-fit contact 6

7.0

Window of the press-in section 7

7.1

Bridge of the press-in section 7

7.11

arcuate contour of the web 7.1

7.2

Bridge of the press-in section 7

7.21

arcuate contour of the web 7.2

7.3

Bridge of the press-in section 7

7.31

arcuate contour of the web 7.3

8th

Connection section of the press-fit contact 6

9

Contact area of the press-fit contact 6

10

Holding area of the press-fit contact 6

11

Connection area of the press-fit contact 6

L

Longitudinal axis of the press-fit contact 6

R

Insertion direction of the press-fit 6

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 102004015431 A1 [0002]

Claims (18)

Arrangement ( 1 ) from a printed circuit board ( 2 ) with - at least one contact point ( 3 ), which with at least one conductor track ( 4 ) of the printed circuit board ( 2 ), and - a contact element ( 6 ) for solderless contacting of the contact point ( 3 ), characterized in that - for producing a press-in connection with the printed circuit board ( 2 ) the contact element is a press-fit contact ( 6 ), and - the contact point ( 3 ) as from the edge ( 2.1 ) of the printed circuit board ( 2 ) outgoing contact slot ( 3.1 ) with one with the conductor track ( 4 ) associated metallization ( 4.1 ) is formed, wherein the press-in contact ( 6 ) in a horizontal position with respect to the printed circuit board ( 2 ) perpendicular to the same in the contact slot ( 3.1 ) is pressed in and horizontally to the circuit board ( 2 ) over the edge ( 2.1 ) extends. Arrangement ( 1 ) according to claim 1, characterized in that the press-in contact ( 6 ) with a deformable press-in section ( 7 ) and a connection section ( 8th ) is formed, wherein the press-in section ( 7 ) one opposite the width (B) of the contact slot ( 3.1 ) has greater thickness (D). Arrangement ( 1 ) according to claim 1 or 2, characterized in that the contact slot ( 3.1 ) two parallel diaphragm walls ( 3.11 ) with the metallization ( 4.1 ), wherein the metallization ( 4.1 ) makes electrical contact with the press-in section ( 7 ) of the press-fit contact ( 6 ). Arrangement ( 1 ) according to one of the preceding claims, characterized in that the press-in contact ( 6 ) is designed as a flat profile with a rectangular cross-section. Arrangement ( 1 ) according to one of the preceding claims, characterized in that the press-in section ( 7 ) of the press-fit contact ( 6 ) with at least two on opposite surfaces ( 6.1 . 6.2 ) of the press-fit contact ( 6 ) and in each case from the surfaces ( 6.1 . 6.2 ) protruding bulges ( 7.1 . 7.2 . 7.3 ) is formed, wherein the bulges ( 7.1 . 7.2 . 7.3 ) a resilient contact with the metallization ( 4.1 ) of the contact slot ( 3.1 ) form. Arrangement ( 1 ) According to claim 5, characterized in that the bulges transversely to the longitudinal axis (L) of the press-fit contact ( 6 ) running webs ( 7.1 . 7.2 . 7.3 ) are formed. Arrangement ( 1 ) According to claim 5 or 6, characterized in that the press-fit ( 6 ) on a surface ( 6.2 ) with two bulges ( 7.2 . 7.3 ) and on the opposite surface ( 6.1 ) with a bulge ( 7.1 ), preferably also formed with two bulges. Arrangement ( 1 ) As claimed in any one of claims 5 to 7 in that the webs ( 7.1 . 7.2 . 7.3 ) of the press-in section ( 7 ) with a transverse to the longitudinal direction (L) of the press-fit ( 6 ) arcuate contour ( 7.11 . 7.21 . 7.31 ) are formed. Arrangement ( 1 ) according to one of claims 5 to 7, characterized in that the webs ( 7.1 . 7.2 . 7.3 ) of the press-in section ( 7 ) with a transverse to the longitudinal direction (L) of the press-fit ( 6 ) frusto-conical or spherical layer running contour ( 7.11 . 7.21 . 7.31 ) are formed. Arrangement ( 1 ) according to one of claims 2 to 9, characterized in that the connection section ( 8th ) with a contact area ( 9 ) for contacting the press-in contact ( 6 ) is formed, which via a in a housing section ( 5 ) embedded holding area ( 10 ) with the press-in section ( 7 ) connected is. Printed circuit board ( 2 ) with at least one with at least one conductor track ( 4 ) ( 3 ), characterized in that for the production of a press-in connection with a press-in contact ( 6 ) the contact point as from the edge ( 2.1 ) of the printed circuit board ( 2 ) outgoing contact slot ( 3.1 ) with one with the conductor track ( 4 ) associated metallization ( 4.1 ) is designed such that the press-in contact ( 6 ) with respect to its longitudinal axis (L) horizontally to the circuit board ( 2 ) in the contact slot ( 3.1 ) is einpressbar. Printed circuit board ( 2 ) According to claim 11, characterized in that the contact slot ( 3.1 ) two parallel diaphragm walls ( 3.11 ) with the metallization ( 4.1 ) having. Press-fit contact ( 6 ) for producing a press-in connection with a contact point having a metallized recess ( 3 ) of a printed circuit board ( 2 ), wherein the press-in contact ( 6 ) with a press-fit into the recess and deformable press-in section ( 7 ) and with a connection section ( 8th ), characterized in that for pressing in the press-fit ( 6 ) in the edge contact slot ( 3.1 ) formed recess of the press-in section ( 7 ) with on opposite surfaces ( 6.1 . 6.2 ) of the press-fit contact ( 6 ) and in each case from the surfaces ( 6.1 . 6.2 ) protruding bulges ( 7.1 . 7.2 . 7.3 ) is designed such that the press-in contact ( 6 ) in a horizontal position with respect to the printed circuit board ( 2 ) perpendicular to the same in the Contact slot ( 3.1 ) to form a resilient contact with the metallization ( 4.1 ) of the contact slot ( 3.1 ) is einpressbar. Press-fit contact ( 6 ) according to claim 13, characterized in that the bulges as transverse to the longitudinal axis of the press-in contact webs ( 7.1 . 7.2 . 7.3 ) are formed. Press-fit contact ( 6 ) according to claim 13 or 14, characterized in that the press-in contact ( 6 ) is designed as a flat profile with a rectangular cross-section. Press-fit contact ( 6 ) according to one of claims 13 to 15, characterized in that the press-in contact ( 6 ) on a surface ( 6.1 . 6.2 ) with two bulges ( 7.2 . 7.3 ) and on the opposite surface with a bulge ( 7.1 ), preferably also formed with two bulges. Press-fit contact ( 6 ) according to one of claims 13 to 16, characterized in that the webs ( 7.1 . 7.2 . 7.3 ) of the press-in section ( 7 ) with a transverse to the longitudinal axis (L) of the press-fit ( 6 ) arcuate contour ( 7.11 . 7.21 . 7.31 ) are formed. Press-in contact according to one of claims 13 to 16, characterized in that the webs ( 7.1 . 7.2 . 7.3 ) of the press-in section ( 7 ) with a transverse to the longitudinal direction (L) of the press-fit ( 6 ) frusto-conical or spherical layer running contour ( 7.11 . 7.21 . 7.31 ) are formed.

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