DE102020206586A1 - Contact, circuit board with the contact, and guide carriage with the circuit board for routing - Google Patents

Abstract

An electrical contact is disclosed with a first contact section for connecting to a circuit board and with a second contact section for contacting an electrical component or a ground and with an elastic section for tensioning at least the second contact section against the component or the ground. A circuit board is also disclosed with this contact, as well as a carriage with this circuit board.

Description

The invention relates to a contact according to the preamble of claim 1, as well as a circuit board with the contact according to claim 5 and a guide carriage with the circuit board according to claim 14.

A route, in particular a linear guide, enables a translational, guided movement. In this case, a stationary guide rail or a stationary guide profile is usually provided, on which a guide carriage is guided with sliding or rolling element bearings.

There is a need to know the load or the forces and moments acting on the guide carriage in order to prevent overloading and to be able to control the movement and transport processes carried out with the routing. According to the state of the art, the load can be detected using a sensor-based strain gauge or piezoresistive layer on the guide carriage.

From the DE 10 2016 210 109 A1 A guide carriage for a linear roller bearing or for a linear guide is known to the applicant, which has a sensor layer arranged in a track insert. The load can be detected via the sensory layer loaded by the rolling elements. The structure is such that electrically contacted, piezoresistive thin-film sensors are arranged distributed in the direction of movement in the raceway insert. As an alternative to this arrangement of the sensor layer, it can be arranged on the outside of the guide carriage so that the load is measured there based on the expansion at the corresponding point on the guide carriage. The strain measurement is carried out, for example, using metallic strain gauges that are glued to the guide carriage.

For the acquisition is from the DE 10 2016 210 109 A1 a piezoresistive thin film, for example a DLC (Diamond Like Carbon) layer known. If this is contacted locally over a large area, the expansion of the substrate on which the layer is arranged can be determined by the change in resistance of the layer at the contact point.

This principle is used in a layer system based on a DiaForce DLC layer, which is what the publication "Multifunctional Thin Film Sensors Based on Amorphous Diamond-Like Carbon for Use in Tribological Applications" by S. Biehl, H. Lüthje, R. Bandorf and J. Sick revealed.

A measurement of the resistance on a deposited layer instead of a glued-on layer has the advantage that the measurement signal is not influenced by an adhesive connection, which improves the effectively usable signal deviation and thus the sensitivity of the measurement system.

The pamphlet DE 102 43 095 B4 shows a rolling bearing with integrated piezoresistive sensors. A piezoresistive intermediate layer is integrated between the bearing shell sections and is contacted by electrodes at specific points. The local measurement cross-section of the respective piezoresistive sensor element is determined via the cross-section of the electrode. By spacing the electrodes along the rolling path, the load on the rolling path can be measured at several points.

The pamphlet DE 10 2017 214 815 A1 the applicant shows an embodiment of the electrodes of a piezoresistive layer for force measurement on a rolling track of a guide carriage. The electrodes contact the piezoresistive layer at points and at a distance from one another. The other end sections of the electrodes are not contacted in the respective solder to the piezoresistive layer. Instead, the electrode extends as a flat conductor path parallel to the rolling path plane in a separating layer and has a contact section spaced from the actual measuring point. This is wired and can be connected to an evaluation unit.

The disadvantage of the known solutions is, in particular, the outlay in terms of device technology, which results from the contacting of the sensor layer and the cabling of the contacts to an evaluation unit, in particular a printed circuit board.

In contrast, the invention is based on the objects of creating a contact, a printed circuit board with the contact and a guide carriage with the printed circuit board, wherein a more compact contacting of a sensor or a sensor layer is to be provided or at least to be made possible.

The first object is achieved by a contact with the features of claim 1, the second by a printed circuit board with the features of claim 5 and the third by a guide carriage with the features of claim 14.

Further developments of the inventions are described in the respective subclaims.

An electrical contact has a first contact section for connecting to an evaluation unit, in particular a printed circuit board. A second contact section of the contact is for contacting an electrical component, in particular a sensor, which can be arranged at a distance, in particular from the evaluation unit or printed circuit board Sensor layer or a mass, in particular an electrode, is provided. Between the two contact sections, the contact has an electrically conductive, elastic, in particular soft elastic section for tensioning at least the second contact section against the electrical component or the ground. According to the invention, this section is straight or rod-shaped, in particular it extends straight and block-shaped, cylindrical or conical-shaped in a tensioning direction.

In comparison to a contact according to the prior art, the elastic section of which is formed by a helical spring, the straight configuration is easier to manufacture, to arrange and to be smaller. In this way, a flat, local contact, for example, to a component designed as a piezoresistive sensor layer or its electrode, can be produced without having to provide a complex multilayer system. This enables a more compact contacting of a sensor or a sensor layer via the contact.

In a development that is particularly easy to manufacture and requires little installation space, the elastic section is formed from an electrically conductive elastomer. In a further development, this is a rubber such as is used, for example, for EMC applications. This can be a silicone-based rubber, for example, which contains silver, nickel, silver-glass, silver-aluminum or graphite.

A further development in which the elastic section forms an end section of the contact has the same advantages in terms of manufacturing and installation space.

In a further development, the second contact section is formed on the elastic section, in particular on the front side of the latter as a contact surface.

Then - in the contacted state - the elastic section comes into contact with its second contact section directly on the electrical component, in particular on its electrode. Its ability to deform then results in a good form fit in the contact area and an optimal and reproducible utilization of the conductive cross section there.

Alternatively, the elastic section can represent a central section of the contact.

A circuit board, in particular a printed circuit board (PCB), for forwarding, processing and / or evaluating an electrical signal from an electrical component, in particular a sensor or a sensor layer, has an electrically insulating plate and at least one electrical conductor arranged thereon, in particular printed on . In addition, at least one electronic component can be arranged on the plate and connected to the conductor. In this case, the conductor is connected to the first contact section of a contact which extends away from the plate and is designed according to at least one aspect of the preceding description. The contact is thus with its second contact section away from or from the plate.

Due to the elasticity of the elastic section, the second contact section can be clamped onto the remotely arranged component, the sensor or the sensor layer or its electrode with little effort in terms of device technology.

In a further development, the circuit board has a stop on which the elastic section is supported, in particular for tensioning.

In order to inhibit the direct action of force on the printed circuit board, a carrier is provided in one development, on which the board is arranged and / or fastened. The carrier is preferably designed to be more stable than the plate. A rigidity and strength of the carrier, as well as its arrangement, is preferably matched to an intended use of the guide carriage and a load interval to be recorded.

In order not to apply the clamping force to the plate and thus to exclude damage to the plate resulting from the clamping force, in a further development the carrier has the stop. This thus absorbs the clamping force without loading the plate.

In order to fasten the carrier in the clamping direction on a component, in particular on the guide carriage, in particular on its electrical ground, the printed circuit board has fastening means, in particular screws, in a further development. In this case, the carrier is preferably penetrated by through recesses, each of which is penetrated by one of the fastening means in the direction of the component.

In order for the second contact section to be able to contact the electrical component, in a development the carrier is penetrated by at least one through recess in the tensioning direction. This is then penetrated by at least the elastic section. In particular, at least the elastic section is guided therein with play. A guide without play is also possible, but reduces its elasticity due to the resulting clamping of the elastic section in the passage recess. Thus, a modulus of elasticity of the elastic section can be influenced via the play, even after a material selection made for it.

In a further development, a comparatively rigid section of the contact extends through the through recess in an area between the plate and the elastic section.

The rigid section preferably carries the first contact section which is connected to the conductor.

In order to be able to apply the tensioning force, in a further development the second contact section protrudes from the through recess when the elastic section is not tensioned. A protrusion of the second contact section beyond an opening of this through recess is dimensioned as a function of a desired clamping force.

In a further development, a shoulder, a shoulder or a collar in the through recess can be used as a stop.

In a further development, the elastic section transversely to the tensioning direction is wider than the rigid section.

In a further development, the circuit board has a plurality of such contacts, each of which is formed in accordance with at least one aspect of the preceding description. Of these, at least one is designed to contact the ground and the other or the others are designed to contact the one electrical component or the plurality of electrical components.

In order to protect the printed circuit board from damage, in a further development it has a cover or a housing from which the board is spanned.

The cover or the housing is preferably fastened to the carrier, so that damage due to the introduction of force into the - comparatively sensitive - plate is prevented.

In a further development, the printed circuit board has, on a side of the carrier facing the electrical component, the mass or the component, a seal which borders the mouth or mouths of the at least one through recess. The contacting of the second contact section can be protected against moisture and soiling via its contact with the component, the mass or the component.

A guide carriage, which is provided for sliding or roller-bearing guidance on a guide rail of a linear or linear guide, has a printed circuit board according to at least one aspect of the preceding description. In this case, the second contact section of the at least one contact makes contact with an electrical component or an electrical ground of the guide carriage, in that the second contact section of the contact is tensioned against the electrical component or the ground via its elastic section.

In particular, the electrical component is a pressure-sensitive sensor, in particular a piezoresistive sensor or a piezoresistive sensor layer, or it is an electrode that makes contact with the sensor or the sensor layer. In the case of the sensor layer, a contact cross section of the electrode with the sensor layer represents a sensor or a sensor surface. The sensor layer is designed, for example, as a DLC, so-called diamond-like carbon.

The above-mentioned carrier is preferably fastened via the fastening means to a substrate of the guide carriage which carries the pressure-sensitive sensor or the sensor layer. The substrate can, for example, be a separate rolling track or track insert or a track element of the guide carriage on which rolling bodies arranged between the guide carriage and the guide rail roll.

In the tensioned state, the second contact section and the underside of the carrier are arranged on the same level and at least the second contact section is in contact with the sensor or the sensor layer or the electrode, so that the elastic section is compressed around the protrusion. The compression results in the tension force with which the second contact section is tensioned on the sensor or the sensor layer or the electrode.

In a further development, the guide carriage has the, in particular separate, rolling track or track insert or the track element on which the rolling bodies that can be arranged between the guide carriage and the guide rail can be rolled. A piezoelectric, in particular piezoresistive layer, on which electrodes are distributed at the rear, is arranged at the rear, in particular to determine the load acting on the guide carriage or the wear and tear. At least one of these is contacted by the second contact section in order to evaluate a sensor or electrode signal. All electrodes are preferably contacted in this way.

In a further development, the electrodes are embedded in an insulating separating layer.

In a further development, these enforce them from the piezoelectric layer to the second contact section making contact with it.

In a development with a so-called sensor section, the cross section of which, as already mentioned, represents a sensor surface, extend away from the piezoelectric layer. This is followed by a line section or a line path, which in turn is followed by a contact section pointing towards the second contact section.

The line section can extend transversely or perpendicularly to the piezoelectric layer.

On the other hand, a parallel extension is of greater advantage. In this way, the signal of the sensor section can be passed into an area that is easier to contact, where the printed circuit board is preferably also arranged. This area is preferably arranged at an easily accessible end section of the track element.

The electrodes, in particular all three sections mentioned, are preferably made together from a metal layer, in particular they are exposed and etched by means of a mask.

In order to improve the electrical contact between the second contact section and the sensor, the sensor layer, the mass or the electrode, a liquid, viscoelastic or elastic layer of an electrically conductive contact agent or adhesive is used between the second contact section and the sensor, the sensor layer , the ground or the electrode. Alternatively, an electrically conductive cushion or a corresponding intermediate layer firmly connected to the electrode can be provided.

In a particularly preferred embodiment of the guide carriage, electrodes are provided which are each contacted by the second contact section assigned to them. The electrodes in turn contact a, in particular continuous, piezoelectric layer which is arranged on a rear side of a separate track element of the guide carriage. The electrodes are preferably not contacted directly or in alignment by the respective second contact section, but are offset. As a result, contact sections of the electrodes that are contacted by the respective second contact section are arranged offset from sensor sections of the electrodes that contact the sensor layer, the contact sections then being arranged in an easily accessible end region of the raceway element. The contact section is then connected to the sensor section of the respective electrode via a conductor track section of the electrode. The contact sections, the conductor track sections and the sensor sections of the electrodes are produced together from the same metal layer, in particular by means of exposure via a mask and etching.

In a further development, the guide carriage has several such contacts, of which several sensors or sensor layers or one sensor layer are contacted at different points or the ground or the electrodes.

The applicant reserves the right to make a claim or a patent application for a route, in particular a linear guide, with a guide rail and a guide carriage guided on it with sliding or roller bearings, which is designed according to at least one aspect of the preceding description.

An embodiment of a route according to the invention with a guide carriage, a circuit board and contacts according to the invention is shown in the drawings. The invention will now be explained in more detail with the aid of the figures of these drawings.

• 1 eine Streckenführung mit Führungswagen in schematischer Darstellung und perspektivischer Ansicht, gemäß einem Ausführungsbeispiel,
• 2 den Führungswagen gemäß 1 mit Leiterplatte in einem Detailschnitt,
• 3 ein Detailschnitt des Führungswagens gemäß den Figuren im Bereich der Leiterplatte und einer davon kontaktierten Sensorschicht, und
• 4 bis 6 die Sensorschicht des Führungswagens in einem Detailschnitt, unkontaktiert, vor der Montage des Kontaktes auf der Sensorschicht und in kontaktiertem Zustand.

Show it:

• 1 a route with guide car in a schematic representation and perspective view, according to an embodiment,
• 2 the carriage according to 1 with printed circuit board in a detailed section,
• 3 a detailed section of the guide carriage according to the figures in the area of the circuit board and a sensor layer contacted by it, and
• 4th until 6th the sensor layer of the guide carriage in a detailed section, uncontacted, before the assembly of the contact on the sensor layer and in the contacted state.

According to 1 has a linear or route guidance 1 a guide rail 2 on which a guide carriage 4th Is guided by roller bearings. A direction of extension, and thus the direction of guidance and rolling, is with x, a vertical axis of the guide carriage 4th denoted by z and a transverse axis by y. The guide carriage 4th is along the guide rail 2 linearly movable. As on the guide carriage 4th effective load, a force F and a moment M are shown by way of example. This load should be recorded.

2 shows a section of the route taken in a yz plane 1 according to 1 . The guide carriage 4th has in the embodiment four linear roller bearings with rows of endlessly rotating, in the embodiment roller-shaped, rolling elements 6th . A different shape of the rolling elements 6th , for example a spherical shape, as well as a different number of rows, are natural possible. Alternatively, a plain bearing is possible. The rolling elements roll on the carriage side 6th on a wagon rolling track 8th of the linear rolling bearing, on the rail side on a rolling rail track 10 of the linear roller bearing transferring the load. The guide rail 2 extends in the x-direction with a constant external cross-section. It is preferably made of steel and is at least in the area of the rail tracks 10 hardened.

The respective wagon rolling track 8th is from the to the guide rail 2 turned surface of a rolling track insert 12th of the linear roller bearing formed rearwardly with a main body 5 of the guide carriage 4th is glued. Alternatively, their non-positive, frictional and / or positive arrangement on the main body 5 is possible. The wagon rolling tracks 8th can of course also be formed in one piece with the main body 5.

On the guide carriage 4th is a circuit board according to the invention 14th arranged, from which a piezoresistive sensor layer is contacted, which is based on the following 3 and 4th is explained. Further descriptions of the basic structure of the route 1 and their guide car 4th can be dispensed with, as this basic structure is sufficiently known from the prior art.

3 forms one in a parallel plane to the yz plane through the circuit board 14th and the guide carriage 4th guided detail cut.

Accordingly, the circuit board has 14th a plate or board 16 on a variety of electrical conductors and electronic components 18th , 20th are arranged. The plate 16 is on a plate-shaped carrier 22nd about screws 24 attached, with the carrier extending over the plate 16 the edge extends out. The plate is covered 16 from a pot-shaped, flat housing 26th so that it is protected against damage from external forces. The case 26th is by means of screws 28 on the carrier 22nd attached, in the said edge-side area of the carrier 22nd intervention.

A surface section of the guide block 4th is with a piezoresistive sensor layer deposited on it 30th Mistake. The surface section thus forms a substrate for the sensor layer 30th . Screws 32 take hold of the carrier 22nd and the piezoresistive layer 30th and are anchored in the guide carriage.

From a top of the plate 16 contacts according to the invention extend 34 through the plate 16 through to their underside, further through the carrier 22nd through to the piezoresistive sensor layer 30th . The respective contact 34 has a first contact section 36 in contact with one of the leaders 18th or electronic components 20th . The contact 34 extends with a rigid, comparatively thin straight section 38 through the plate 16 and an upper portion of the carrier 22nd . In this is a stepped through recess 40 provided by the contact 34 is penetrated. In the radially expanded section of the through recess 40 extends the contact 34 with a soft elastic section formed by an electrically conductive rubber 42 . This is supported on the one hand on the radial shoulder of the through recess and on the other hand contributes to its piezoresistive layer 30th facing end section at the end a second contact section 44 . The elastic section is constructive 42 Provided longer than the radially widened section of the through recess is deep, so that the elastic section 42 before mounting the carrier 22nd with a protrusion from the through recess 40 protrudes (cf. 5 ). When putting on the carrier 22nd according to 6th therefore becomes the elastic portion 42 compressed, whereby the second contact portion 44 with the resulting clamping force on the piezoresistive layer 30th presses.

In order to improve the contact transfer, the piezoresistive layer was applied before the assembly 30th an electrically conductive adhesive 46 applied (cf. 4th until 6th ).

For applying the piezoresistive layer 30th can be the substrate, depending on its initial state and the type of layer to be deposited on it 30th , processed in order to achieve a low roughness and thus a good layer adhesion. In particular, short circuits are caused by local peaks that affect the layer 30th could pierce, avoided. A suitable sensor layer is any layer that has a piezoresistive effect of such a magnitude that the change in resistance can be easily detected by measurement. From this point of view, it is good if the layer has an initial resistance 30th , i.e. in the unloaded state of the guide carriage 4th , is not too high or too low. Resistances of a sensor element between 100 ohms and a few megohms are desirable for this. Resistances that are too low increase the power consumption and self-heating of the elements, while resistances that are too high make precise detection more difficult due to increased thermal noise and generally less precise references (resistors, power sources, etc.). It must also be noted that the piezoresistive effect has an isotropic effect and, in particular, does not depend on the direction of the current flow, since the measurement takes place perpendicular to the strain occurring. In the case of many crystalline materials, for example silicon, the piezoresistive effect is, however, strongly direction-dependent and so possibly not technically useful for a specific application. Suitable is from all these aspects, especially an amorphous layer 30th made of diamond-like carbon (DLC). With this kind of shift 30th the deposition parameters can be adjusted so that resistances of 1-2 megohms can be achieved with a contact area of 1 mm ² , unloaded and at room temperature. At the same time, k-factors of up to approx. 100 are achieved in practice. In addition, DLC layers are characterized by good adhesion and high hardness, which increases mechanical resistance. Also with regard to the temperature there are virtually no restrictions in the temperature regimes customary in industry (-20 to 100 ° C). Only a considerable dependence of the resistance on the temperature makes it difficult to use as a sensor layer 30th . For this reason, the temperature curve should be calibrated and then the temperature on the surface should be determined. In addition, by offsetting the individual signals from the local contacts 34 against each other, if necessary by means of a clever placement of the contacts 34 relative to each other, a temperature sensitivity can be significantly compensated or reduced.

The elastic section 42 with its second contact section 44 is so soft that even with a low clamping force and the resulting contact pressure, a high effective contact surface is achieved. With the effective area is meant the area that is the second contact section 44 and the contacted surface of the piezoresistive layer 30th actually share. This becomes as the rigidity of the second contact section increases 44 reduced by geometric inconsistencies and is smaller than the apparent contact area. Macroscopically, this can be, for example, a deviation in the parallelism of the surfaces or a curvature. By choosing a soft material for the elastic section 42 this can be reduced, since such deviations can then be compensated for even at low pressures.

Microscopically, the roughness mentioned results in a reduction in the actual surface. A resistance resulting therefrom is also referred to as tightness resistance and, given the materials and surfaces, can be determined from the second contact section 44 and the layer 30th , if necessary by the contact agent 46 reduce (cf. 4th until 6th ).

These 46 is for example a conductive adhesive or a conductive lubricant. The use of an adhesive has the advantage that after hardening a more stable connection is established than with a lubricant that remains liquid and can therefore still move.

It should be noted that the tightness resistance and also the resistance due to macroscopic deviations, if it remains constant, can be removed in one calibration. Since only the contacted area changes in both, this does not affect the relative resistance signal. However, there is a risk that either over time, for example due to a reduction in the clamping force and the contact pressure, in particular due to aging or relaxation effects, or in use due to a slight change in the position of the carrier 22nd and substrate to each other, the parasitic resistances / actual surfaces change, which makes precise interpretation of the measurement data difficult. Therefore, these resistances should be kept as small as possible right from the start, or a stable contact should be aimed for as full-surface as possible. Due to its mechanical properties, rubber is particularly well suited for this, since it enables a (comparatively) constant contact pressure to be achieved, even if the distance between the substrate and the carrier is different 22nd should change minimally. Due to the low modulus of elasticity of rubber, a high effective contact surface can be achieved even with low contact pressure, unlike with hard materials such as metals, where very precise geometrical tolerances have to be adhered to.

The carrier 22nd and the case 26th consist of a poorly electrically conductive material. Above all, it is significantly less conductive than the contact 34 and the sensor layer 30th . Products made of injection molding or 3D printing are suitable here.

Alternatively, if the required contact pressures are lower, instead of the screw connections shown, a latching device can be used on the carrier 22nd be provided with a corresponding counterpart in the substrate. These can be printed directly.

The narrow and rigid sections are particularly effective and inexpensive 38 of contacts 34 formed by pins that connect to the conductors 18th or electronic components 20th on the plate 16 are soldered. The pattern of contact 34 on the plate corresponds to the pattern of the contacts 34 in contact with the sensor layer 30th . This form of contact can be established quickly and is mechanically stable.

Is the shift 30th about the contacts 34 contacted, the further signal processing is initially carried out on the circuit board 14th . The basis is a resistance measurement. Depending on the selected material of the sensor layer 30th There are different methods available. For lower resistances, the connection with a constant current source is possible, for higher resistances this is difficult to do precisely with commercial current sources, which is why A circuit with a voltage divider and a constant voltage source is an option here. Signal conditioning can then also take place by using a low-pass filter with a suitable cut-off frequency. A suitable frequency depends on the application. Also can be on the circuit board 14th digitization is already taking place. Especially then, a low-pass filter can be used to reduce aliasing. Depending on the type of analog-digital filtering, it may still be necessary to have an amplifier circuit on the circuit board 14th to be applied in order to avoid corruption of the signal by additional input capacitances. Once digitized, the resistances / voltages can then either be sent to the outside directly via an interface to an A / D converter, or they can be evaluated locally by a digital processing unit on the circuit board 14th , for example by a microcontroller or an FPGA. Bringing the entire measuring chain directly into the housing 26th also enables the lines to be kept to a minimum and thus to reduce EMC influences. In addition, this procedure is easy to industrialize, since no further complex assembly and connection technology is necessary. The exact evaluation algorithm, which then converts the measured resistances or equivalent strains into the quantity to be measured, such as a load acting on the body, depends on the application.

Disclosed is a contact with an elastic section that extends in a straight line, via whose elastic deformation, in particular compression, a contact force of the contact can be impressed on an electrical component to be contacted.

A circuit board with the contact is also disclosed, wherein one contact section is connected to a conductor, electrical component or electronic component of the circuit board and the other contact section is or can at least be brought into contact with the electrical component to be contacted.

A guide carriage with the printed circuit board is also disclosed, a particularly piezoresistive sensor layer being provided on the guide carriage for detecting a load acting on the guide carriage, the contact or several such contacts being or are tensioned on the sensor layer and / or an electrical ground of the guide carriage.

List of reference symbols

1

Routing

2

Guide rail

4th

Guide carriage

6th

Rolling elements

8th

Wagon rolling track

10

Rolling rail track

12th

Roller track insert

14th

Circuit board

16

Plate / board

18th

electrical conductor

20th

electronic component

22nd

carrier

24

screw

26th

casing

28

screw

30th

piezoresistive sensor layer

32

screw

34

Contact

36

first contact section

38

rigid section

40

Through recess

42

elastic section

44

second contact section

46

Contact agent

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Patent literature cited

• DE 102016210109 A1 [0004, 0005]
• DE 10243095 B4 [0008]
• DE 102017214815 A1 [0009]

Claims (15)

Electrical contact with a first contact section (36) for connecting to a printed circuit board (14) and with a second contact section (44) for contacting an electrical component (30) or an electrical ground (4) or an electrode thereof, and with an elastic section (42) for tensioning at least the second contact section (44) against the electrical component (30) or the mass (4) or the electrode, characterized in that the elastic section (42) extends straight, in particular block, cylinder or conical. Contact after Claim 1 wherein the elastic portion (42) is formed from an electrically conductive elastomer. Contact after Claim 1 or 2 , wherein an end portion of the contact (34) is formed by the elastic portion (42). Contact for one of the Claims 1 until 3 , wherein the second contact section (44) is formed on the elastic section (42), in particular on the front side of the latter. Circuit board for processing an electrical signal of at least one electrical component (30) or an electrical ground (4), with an electrically insulating plate (16) and electrical conductors (18) and / or electronic components (20) arranged thereon, and with at least a contact (34) extending therefrom according to one of the preceding claims, the first contact section (36) of which is connected to one of the conductors (18) or electronic components (20). PCB according to Claim 5 with a stop on which the elastic section (42) is supported, in particular for tensioning. PCB according to Claim 5 or 6th with a carrier (22) on which the plate (16) is arranged and / or fastened. PCB according to Claim 7 with fastening means (32) by means of which the carrier (22) can be fastened to a component (4), in particular the electrical ground. PCB according to Claim 7 or 8th wherein the carrier (22) is penetrated by at least one through recess (40) which is penetrated by at least the elastic section (42). PCB according to Claim 9 wherein the at least one through recess (40) is penetrated by a comparatively rigid section (38) of the contact (34) via which the elastic section (42) is connected to the first contact section (36). PCB according to Claim 9 or 10 , wherein the second contact section (44) protrudes from the through recess (44) in the untensioned state. PCB according to one of the Claims 5 until 11th with a cover or a housing (26) from which the plate (16) is spanned and which is attached to the carrier (22). PCB at least after Claim 9 or Claim 8 and 9 , wherein on one of the electrical component (30) or the electrical ground (4) or the electrode facing side of the carrier (22), on which a mouth or mouths of the at least one passage recess (40) is or are arranged, a seal surrounding this is provided for installation on the electrical component (30), on the ground or on the component (4). Guide carriage for sliding or roller bearing guidance on a guide rail (2) of a track or linear guide (1) on which a printed circuit board (14) according to one of the Claims 5 until 13th is arranged, wherein an electrical component (30) or an electrical ground of the guide carriage (4) or an electrode is contacted by the second contact section (44), and wherein the second contact section (44) via the elastic section (42) against the electrical component (30) or the electrical ground (4) or the electrode is tensioned. Guide carriage after Claim 14 with a rolling track insert (12) on which the rolling elements (6) can be rolled, a piezoelectric layer (30) being arranged at the rear of the rolling track insert (12), on which electrodes are arranged distributed at the rear, of which at least one is provided for evaluating a sensor signal second contact portion (44) is contacted.

Images