NL8401325A - CONTACT LIST (SPRING OR KNIFE CONTACT LIST) FOR A PLUG SYSTEM FOR CONNECTING AN ELECTRONIC DRIVER TO A WORKING MACHINE. - Google Patents

Description

i 'a I

Contact strip (spring or knife contact strip) for a connector system for connecting an electronic control unit to a work machine.

The invention relates to a contact strip (spring-5 or knife contact strip) for a plug system for the connection of

an electronic control device with a working machine and on a method I

for the manufacture of contact strips, in which a sheet metal strip is punched into a sheet lamella strip, and in which identical, connected by at least one connecting strip of the sheet metal strip, I

10 flat plate slats at the mutual distance of the grid size. I

be strung, and then through the plate slats. bend to contact- I

elements deformed and finally the contact elements of the sheet metal I

the tape must be separated. I

Under "timetable size" in the sense of the method described, j

15 the distance between two in a row, calculated from center to center

adjacent recesses in the plastic component. I

With a known contact list as described above I

ven (German Offenlegungsschrift 27 47 264) are the connection contacts I.

designed as sockets. For this reason, when establishing a connection between the contact strip and a conductor plate

requires a pin bar, the contact pins of which with the I

contact strip and contact the contact plate on the other. The bending- I

edges of the contact elements run parallel to the symmetry I.

flat and thus parallel to the longitudinal direction of the plate lamellae

25 band. The distance of the plate lamellae in the plate lamella corresponds to this

belt with the 'grid size'. The contact elements are marked with I.

separated from the plate lamella band by means of an automatic machine and I

in particular in the recesses of the I

plastic component used. Using the contact list becomes I

30, however, complicated by the fact that the contact blades of the contact elements I

lie within the plastic component and the cable cores to be contacted must therefore be inserted into this plastic component. Top I

the contact knives are used when contacting the cable. Chargers I

actually deformed against the oblique surfaces of the plastic component, for which an increased axial pressure is required. I

8401325 ϊ · ί 2

By a contact strip of a similar type (German Offenlegungsschrift 27 36 244) it is also known to form contact elements in such a way and to arrange them in two parallel rows in the plastic component, which within the grating dimension in the longitudinal direction of the contact strip two contactings are possible. However, each contact element has only a single contact knife, so that the contact security is correspondingly less.

Finally, a contact element with two pairs of contact blades is also known, wherein a contact pin is welded over a longitudinal side to a spine arranged parallel to the direction of insertion of the contact element. The bending sides of this contact element also run parallel to the stitch direction. Although such a design and application have good spatial conditions for a welded connection, the conditions for a combined association of knife contact parts, spring contact parts and contact pins as components of different contact elements on the basis of the construction box principle are lacking.

Based on this, the invention is based on the object of further shaping a contact list of the aforementioned type in such a way that, under improved conditions for rational series production in the case of a knife contact list, it meets the highest requirements with regard to until the axial load during contacting is sufficient and, in the case of a spring contact strip, also guarantees a satisfactory contact quality in the range of minimum currents.

This object is achieved by the measures mentioned under the feature of claim 1.

In such an embodiment, the fixing of the adjustment legs in the plastic component gives a straight contact yield. plan-parallel contact position of the contacts, independent of the exactness of the bending edges. This achieves an almost ideal symmetry of the contacts, resulting in a high contact quality.

In the spring contact strip, a relatively large surface of the spring legs rests in the contact part.

8401325

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3 I

The contact elements can be selected from contact parts (spring I

resp. blade contact parts, contact pins) assembled by welding. There I

through it is possible, according to the 'construction box system' from an assortment

spring contact parts, knife contact parts and contact pins to I.

5 election to combine different contact elements. Also, the I

conditions are met, that if necessary of special equipment I

of the plastic components with the aid of capital-intensive I

automatic vending machines in favor of simpler, cheaper methods I

according to the method claims, which can be for instance I

10 may be of interest to smaller companies. I

A welded joint according to claims 2, 5, 6 complies with I.

the highest strength requirements. According to claim 3, the inputs to I.

to close the recesses, preventing the ingress of the by I

soldering the contact pins 11, 14 to the electrically conductive I.

15 parts of the printing plate 15 in Figs. 3, 5, 13, 14 were created aggressive

resp. I

vapors in the recesses are prevented1 a separate cover I

These inputs are no longer valid. I

When carried out according to claims 4 and 8, I is obtained

centering of the contact elements as reliable as simple

20 in the plastic component with improved contact quality. I

By the measure defined in the second part of claim 4 I

As a rule, the contacting is made with simultaneous improvement of the

facilitates contact.

It is achieved by an embodiment according to claim 7 that I

25 a single plastic molding is sufficient to fit the contact strip

with regard to its stitching direction parallel to or perpendicular to I.

on a printing plate.

By an embodiment according to claim 9, the number of the I

contact markings per contact list to be obtained by the contact knives I

30 can be increased significantly. I

The method for claims rational serial production is provided by the method according to claims 10-12.

The invention will be explained in more detail below with reference to exemplary embodiments shown in the drawings.

FIG. 1 shows a spring contact strip and a knife contact strip in 8401325 4 - ί Ê the partially cut-out plug system,

Fig. 2 shows a cut-out part of the plug system rotated by 90 ° according to FIG. 1,

Fig. 3 shows the spring contact strip on a pressure plate arranged parallel to the stitching direction in section according to III-III in fig. 4,

Fig. 4 shows the device rotated by 90 according to FIG. 3, FIG. 5 shows a spring contact strip on a pressure plate arranged transversely to the stitching direction in section according to V-V in FIG. 6, FIG. 6 shows the device rotated through 90 ° according to FIG. 5,

Fig. 7 shows an enlarged cut-away section of FIG. 12, viewed in the region of a recess,

Fig. 8 shows the plastic component of the spring contact strip in top view, FIG. 9 is a section on IX-IX in FIG. 10,

Fig. 10 shows the plastic component rotated through 90 ° according to FIG. 8,

Fig. 11 shows the plastic component according to FIG. 12 in end view, FIG. 12 shows the plastic component according to FIG. 8 in bottom view,

Fig. 13, 14 show a spring contact element and a knife contact element in the mutual contact between pressure plate and cable in two perpendicular views, FIG. 15 shows an enlarged cut-out from FIG. 14,

Fig. 16 is a section according to XVI-XVI in FIG. 15,

Fig. 17 shows a spring contact element viewed in the plug direction, FIG. 18, 19 show the spring contact element according to Fig. 17 in two side views,

Fig. 20 shows the spring contact part in a representation according to FIG. 17.

Fig. 21 shows the spring contact part in a representation according to FIG. 18.

8401325 if 5 fig. 22 shows a plate lamella of the lamella band with bent spring legs, fig. 23, 24 shows a plate lamella in two perpendicular views, fig. 25, 26 show a natural size spring contact element with associated plate slat,

Fig. 27-36 show manufacturing steps I-V in the manufacture of the spring contact element,

Fig. 37-39 show a blade contact element in end view and 10 in two perpendicular side views,

Fig. 40 shows the blade contact part in a representation according to FIG. 38, FIG. 41, 42 show a plate lamella of the lamella band in two perpendicular views, FIG. 43-50 show manufacturing steps I-IV in the manufacture of a knife contact element,

Fig. 51, 52, 53 show the knife contact strip combined with the clamping elements to form a plug unit

Fig. 54, 55 show a variant comprising combined spring-knife-20 contact elements and

Fig. 56-63 show further examples of the welded joint.

Fig. 1 and 2 illustrate the use of the contact lifting strips, for example, of a plug system for connecting the switching elements of an electronic control device, namely a pressure plate with the cables leading to a machine. The pressure plate 15 is fixed on the end side to the spring contact strip F. A mounting frame 21 is attached to the wall 22 of the control device through the aid of mounting flanges 21b. A plug 20 is inserted therein, in which the cores 16a (fig. 15, 16) of the cables 16 are contacted by means of the knife-30 contact strip M. The cores of the cables 16 consisting of round conductors and / or flat tape laid out in one plane parallel to each other are clamped between clamping elements 24 and 25 and cut by the knives 13a of the knife contact strip M.

The contact pins 14 of the knife contact strip M contact the spring contact elements of the spring contact strip F. The bent contact pins 8401325 - ψ ζ 6 grip through the pressure plate 15 and are soldered to it.

The cables 16 are led out of the plug 20 via a recess 32 extending symmetrically with respect to a joint 33 of the plug 20. The plug 20 is fixed in the mounting frame 21 by means of elastic snap tongues 21a.

The following also applies to the structure of the spring contact strip F and of the blade contact strip M: a plastic component 17 resp. 23 is provided with identical contact elements which are axially supported in a row in recesses of this plastic component. The contact elements each run at one end in a contact pin 11, respectively. 14 and at the other end in a contact part 10 'resp. 13 'with flat contact areas. This contact part 10 'resp. 13 'is bent by bending a plate lamella 10 resp. 13, which is punched from its side out of a sheet steel strip from a rolling plate. The longitudinal axes of the plate lamellae run perpendicular to the rolling direction A of the rolling plate. The contact parts 10 'resp. 13 'are formed such that they each have a symmetry plane z-z running parallel to the rolling direction A. Their bending sides 10s (fig. 18, 21) resp. 13s (fig.

38, 40) run parallel to this plane of symmetry z-z. The contact-20 part 10 'resp. 13 'has two adjustment legs 10b', 13m 'running parallel to the symmetry plane z-z, which are interposed by a spine 10a' extending perpendicular to the symmetry plane z-z; 13n 'are linked together. There is a contact pin 11 resp. 14 butt welded (fig. 13, 14, 17, 19, 33-39, 48-53). The ridges 10a ', 25 13n' close the recesses of the plastic component 17, respectively. 23 sealing on the contact pin side. In the examples of Figs. 56-63, the contact pins 11 are welded to the adjustment legs 10b '. The following details describe the structure of the spring contact strip F: The ridges 10a 'are laid flat against the collars 17g (fig. 7, 9) of the plastic component 17, which lie symmetrically on either side of the symmetry plane z-z. The adjustment legs 10b 'are in the region 10b "of their longitudinal edges (Fig. 14) in the centering recesses 18b (Fig. 7, 9, 10).

This results in an as simple as a reliable fitting seat for the contact elements in the recesses 18, the engaging openings 18b of which are substantially adapted to the shape of the contact pins 14 8401325.

The adjusting legs 10b 'provided with snap cams 10c' pass in the direction of bending edges parallel to the roller 7A into smaller width contact legs 10d, which extend into contact areas 10e 5 and which enclose an acute angle with respect to the plane of symmetry zz (fig. 1, 3 , 5.13, 14, 18, 21-36). The biased spring legs 10d are kept at a distance from the plastic component 17 by spreading ridges 17h (Figs. 3, 7, 8). The molded plastic component 17 has, for election connecting 10 to a pressure plate 15 in two different positions on each end side, two spring legs 17c, 17c 'with rear gripping lugs 17d, 17d' (Fig.

8-12). A parallel centering pin 17b, 17b 'is mounted on each spring leg 17c, 17c'. The spring legs on each end side of the plastic component are formed on a common socket foot 17e, as shown in particular from Figs. 8-12. Each spring leg 17c, 17c 'with the associated centering pin 17b, 17b' forms a columnar locking member of substantially circular cross section. The perpendicular interlocking members, by electionally inserting them, allow election of spring contact strip F and pressure plate 15 in different positions, the interlocking members being under short bending of the spring legs 17c, respectively. 17c 'are inserted into corresponding bores of the pressure plates 15 to effect the rear engagement of the rear engagement cams 17d, 17d'. When applying pressure plate 15 and spring contact strip F in accordance with Fig. 3, the mounting collar 17f * of the plastic component 17 abuts the end of the pressure plate 15, which is not the case with an application according to Fig. 5 .

The opposite collar 17f of the plastic component 30 of the spring contact strip F contacting the knife contact strip lies at least partially against end edges of walls of the housing of the plug 20.

In the exemplary embodiments of Figs. 56-63, the lead pins extending perpendicularly to the back 10a 'lead a central opening through this back each time, so that they delimit the side centered against the opening. to be. For the further fixing of the contact pins and for their axial support, these always lie in the region of the opening against the back 10a 'through the intervention of a bead edge produced by upsetting. The rear end portion of the contact pin 11 projecting inwardly between the adjustment legs 10b 'is welded to portions (welding portions 110b) of the adjustment legs 10b'. The weld portions are bent inwardly from the plane of the adjustment legs 10b 'to the symmetry plane z-z (Fig. 56), as shown in Figs. 56 to 63. In the exemplary embodiments of Figs. 58 to 63, relatively narrow welding portions 110b '(Figs. 58, 59); 110b "(FIG. 60, 61) and 110b" "(FIG. 62, 63) are partially separated from the remaining face area of the associated adjustment leg 10b 'by straight punches. At least two welding portions S laterally delimiting in the direction of stitching S occur in this case.

In addition, in the examples of Figs. 60 to 63, a further punch S ', S "occurs in each case, which in the case of Figs. 60 and 61 on the spring contact side and in the case of Figs. 62 and 63 on the contact pin side and perpendicular to the punches S 20. This creates tongue-shaped welding portions 110b "; 110b "which are only in communication with the associated adjusting legs 10b 'through their base. The weld joint 36 between the rear ends 11e and the weld portions 110b' is in any case arranged symmetrically with respect to the plane of symmetry zz. Also in the described Embodiments are the adjustment legs 10b 'in regions 10b "of their longitudinal edges in the centering recesses (18b in FIGS. 7, 9, 10) of the plastic component (17) to be introduced subsequently, so that a centering of the spring legs 10d through the intervention of the associated adjustment legs 10b. 30 arises.

The following details describe the blade contact list M:

The contact elements are axially fixed in that a contact edge 13h of the blade contact part 13 'always equals the surface of the plastic part 23 and thus in the plug-in system against the lower clamping part 24 (fig. 1, 51). is on.

An oppositely oriented abutment side 13i of the knife contact part 13 'is supported and fixed in a niche 23a of the plastic part 23 (fig. 31-53).

This results in a strictly parallel alignment of the blade 13a, which is important for the quality of the contacting.

As shown in Figs. 1, 51-53, the knives 13a of the knife contact parts 13 'penetrate through the clamping elements 24, 25, to contact the cores 16 with core 16a and sheathing 10 16b clamped between these clamping elements. The knives 13a the blade contact parts 13 'are offset laterally with respect to the contact pins 14 such that the narrow sides 13k of these knives 13a are aligned with the contact pins 14. The knife contact parts 13 'in one row of recesses 34 of the plastic component 23 are arranged mirror-symmetrically with respect to the knife contact parts 13' of the other row of the same plastic component 23 and anchored by means of anchoring cams 13t. As a result, the slots 131 between the knives 13a in one row of recesses relative to the slots 131 of the knives 13a of the other row of recesses 34 in the longitudinal direction 20 of the adhesive-shaped plastic component 23 are mutually displaced (fig. 15, 16, 51). Because of such an arrangement, the cores 16a of the cores 16 clamped between the clamping members 24 and 25 are contacted alternately by a knife from one row and by a knife from the other row, which means a considerable saving of space.

The exemplary embodiment of Figs. 54, 55 shows a possibility of connecting cables to other cores 16 in the conductor path between the control device and the working machine wires 16 by means of two contact strips. One contact strip is a spring contact strip 30 with contact elements, each of which is provided with a blade contact part 13 'at one end and a contact pin 14 at the other end.

The other contact strip is equipped with combined spring-knife contact elements which are each formed in such a way that a blade contact part 35 'is welded to the back 35 10a * of a spring contact part 101, the back 35a' of which is attached to the back 10a 'of the spring contact part 10 '8401325 -__________________ - I l 10 is in contact.

Both the cores 16 contacted by the knives 13a of the spring contact strip and the cores 16 contacted by the knives 35a of the other contact list are arranged between clamping components (the plastic components and the clamping components are not shown in the drawing in the example discussed). The spring contact parts 10 'of the combined spring-knife contact elements 10', 35 'can thus be included and fixed in the associated plastic component, as already described for the spring contact strip. In any case, the abutment side 35h adjoining the narrow side 35k is flat against the back 35a ', because the knife contact part with slot 351 has no adjustment legs.

In general, the plate strip can consist of a rolling plate and its longitudinal direction A corresponds to the rolling direction. Contact pins 11; 14 are each of an upswept head 11c; 14c, which facilitates welding.

The general manufacturing method includes the following method steps;

A sheet metal strip is punched into a sheet metal strip L, L 'symmetrical on two sides, the plane of symmetry z-z of which extends parallel to the longitudinal direction A (fig. 27, 43). In a further fundamental method step, the ends of the plate lamellae 10, 13, extending on either side of the symmetry plane zz, form a spine 10a, 13n 'extending perpendicular to the symmetry plane zz in such a way as to be symmetrical with respect to the symmetry plane zz bend over substantially 90, that the bending edges 10s, 13s located in the region of the middle parts 10a, 13n of the plate lamellae 10, 13 extend parallel to the longitudinal direction A of the plate tape.

After that a connection contact is made on each back in the form of a contact pin 11; 14 resp. a blade contact part 35 '(fig. 54, 55) is welded on. The contact pins 11, 14 are each provided with a predetermined breaking point 11b, 14b at the transition to the end parts 11a, 14a. The end parts 11a, 14a of the contact pins 11, 14 are then connected to each other by welding on a supporting strip 12, 35 provided with transport holes 12a, 35a. Then, the contact parts 10 ', 13 * are separated from each other by cuts along the connecting strip 10f / 13f. Then, the contact elements so far obtained in the method are rolled up into a contact element tape K, K '(fig. 35 and 49). Then, if necessary, the contact element bands K, K 'are inserted for the insertion of the contact elements into the recesses 18 and 18, respectively. 23 of the contact element 17 resp. 23 unrolled and parts of the contact element tape K, K ', which each correspond to the length of the associated plastic component 17, 23, in the recesses 18; 34 entered. As a last step in the process, the contact elements introduced into the recesses are subsequently broken off jointly by the end parts 11a, 14a as a result of pivoting away of the support strip 12 and 12 respectively. 35 separated from each other (see fig. 35, 49). The special manufacturing method for the production of the spring contact strip comprises method steps IV (fig. 27 to 36): In method step I, a sheet lamella band L is punched out of a sheet strip in accordance with fig. 27, 28 in which identical plate lamellae are connected together by at least one connecting strip 10 or mutually, the longitudinal axes of which are perpendicular to the longitudinal direction A. Thereafter, the free ends of the plate lamellae 10 are slightly bent according to a method step II in the same sense, as can be seen from Figs. 29, 30.

In method step III, the ends of the plate lamellae 10 extending on either side of the symmetry plane z-z are jointly symmetrically offset from the symmetry plane z-z to form the back 10a extending perpendicularly to this symmetry plane z-z. The result is through the use of a connecting strip 10 or mutually connected spring contact parts, as can be seen from Figs. 31 and 32. In method step IV, contact pins 11 become; 14 butt welded to the ridges 10a ', 13a' 30 to form a tape in accordance with FIGS. 33, 34.

In method step V, predetermined break points 11b are provided on the contact pins 11 by means of constrictions and a supporting strip 12 is welded onto their end portions 11a. The spring contact parts are then separated from one another by cuts along the connecting strip 10F (FIGS. 29-35 33), so that a contact element tape K in accordance with FIGS. 35 and 36 is produced, which is rolled up.

8401325 * t κ.

12

Parts of the contact element belt K are then unrolled, and the contact elements of this part are fed into the recesses 18.

The contact elements introduced into the recesses 18 are separated from one another by breaking off the end portions 11a along the predetermined fracture locations 11b as a result of the carrier belt 12 pivoting away.

The special method for the manufacture of the knife contact strip comprises method steps I-IV (fig. 43 -50):

In a first method step I, a lamella strip L '10 (fig. 43, 44) is punched out of the plate strip. In the process step II, the lamella strap L 'is bent into the blade contact parts in accordance with Figs. 45 and 46, which are connected by the connecting strip 13f. In the method step III, the contact pins 14 are butt welded to the ridges 13n ', so that tires according to FIG.

15 47 and 48 arise. The method step IV, which leads to contact element bands K ', in accordance with Figs. 49 and 50, and the further method corresponds to the method step V (Fig. 35, 36) in the manufacture of the spring contact strip. This, however, with the measure that two knife-contact element belts (K '), each rolled up in a mirror symmetrically relative to each other, are disposed on either side of a plastic component 17; 23 and unroll in the opposite direction. One row of contact band K 'provides one row Rh and the other row of contact band K' supplies the other row Rv of recesses of the plastic component (23).

Briefly summarized, it has been described above that the contact elements arranged in a row in the plastic component of the contact strip are formed by bending from plate lamellae 10 in such a manner that their spring contact part 10 'is parallel to the longitudinal direction of the lamella band, from which these are punched out, have a smoothing symmetry plane zz. The 90 ° bending sides 10s run parallel to this symmetry plane z-z. This permits straight-contacting attachment of the spring legs 10d under the occurring shapes with the aid of relatively longer adjustment legs 10b 'and a simultaneous introduction of the contact elements in the plastic component in the connection on the basis of normalized mutual distances, such as in particular from Figs. 21-24.

8401325

Claims (14)

1. Contact strip (spring or knife contact strip) for a plug-in system for connecting an electronic control unit to a | working machine, with a plastic component, with contact elements punched out of I 5 in a plate strip (plate lamella strip) and formed in recesses I of this plastic component in at least one row, so that a contact element running substantially perpendicular to the direction of stitching I and perpendicular to a plane of symmetry via the bending edges I running parallel to this I plane of symmetry and perpendicular to the stitch direction I in two angles at right angles to the back, contacts (knife or spring contacts) are formed at the free I 10 ends thereof, I with a connection contact on the back of each contact element with the opposite direction of insertion, characterized in that the I connection contacts (contact pins 11; 14) or knife contact parts (35 * I in fig. 54, 55) on the backs (10a '; 13n'j and / or on the setting I 15 legs (10b ', 13m') with perpendicular to the back (10a ', 13n') standing stitch direction (e.g., in fig. 54, 55) welded on and the adjustment legs (1 0b ', 13m') for centering the plastic component I (17; 23) outwardly projecting contacts (spring contacts 10e; blades I 13a) on internal profiles (centering recesses 18b in fig. 7, 8 and I 20 recesses 23a in fig. 51, 53) of the recesses (18, 34) under the openings. In stepped shapes, the adjusting legs I can be resiliently moved transversely to the plane of symmetry (zz) without fixing. Contact strip according to claim 1, characterized in that 25 contact pins (11, 14) are arranged as connection contacts and each time I is connected to the back (10a ', 13n') by means of an impulse-produced head (11c) by means of I splicing. Contact strip according to claim 1 or 2, characterized in that the ridges (10a *, 13m ') close the recesses (18, 34) in the plastic component (17, 23) and in the case of a spring contact strip against external collars (17g in fig. 7, 9) and in the case of a knife contact strip bear against internal collars (fig. 52, 53) of the plastic component (17, 23), which collars lie symmetrically on either side of the plane of symmetry (zz). 8401325 * V Spring-formed contact strip according to any one of claims 1 to 3, characterized in that the adjustment legs (10b ') in regions (10b "in Fig. 14) of their longitudinal edges in centering recesses (18b in Figs. 7, 9, 10) 5 intervene subsequently under the occurring shapes, the narrower spring legs (10d) compared to the adjustment legs (10b ') being kept at a distance from the plastic component (17) by spreading ridges (17h) (fig. 3, 7, 8) . Contact strip designed as a spring contact strip according to any one of claims 1, 3, 4, characterized in that the contact pins (11) are each passed through an opening through the ridges (10a), in the region of the opening by means of a Upright channel edge (member) abutting axially against the associated spine (10a ') and welded with their rear ends (11e) projecting between the adjustment legs (1Od1) to portions (welding portions 110b') of the adjustment legs 15dOb ') welded parts are bent inwards from the plane of the adjustment legs towards the symmetry plane (zz) (fig. 56-63). Contact strip according to claim 5, characterized in that the welding parts (110b '; 110b "; 110b" "in fig. 58-63) are cut by straight punches • (S, S', S") of the remaining plane range of the associated adjustment - leg (10b ') are separated. Contact strip according to any one of claims 4-6, characterized in that the plastic component (17) for connecting to a pressure plate (15) in different positions two perpendicular spring legs (17c, 17c ') with resilient socket feet (17e) ) with the centering pins (17b, 17b ') (fig. 8-12). Contact strip designed as a knife contact strip according to any one of claims 1 to 3, characterized in that for centering the adjustment legs (13m '), contact edges (13i) of the knife contact parts (13') 30 engage in niches (23a) of the plastic component (23) wherein oppositely facing abutments (13h) of the blade contact parts (13 ') are flush with the surface of the plastic component (23) (Figs. 1,2,14,15,51-53). Contact strip according to one of the preceding claims, characterized in that the recesses (18, 34) in the plastic file * 8401325> * 15 part (17, 23) are arranged in at least two parallel rows (Rv, Rh) in such a way that groups of at least two recesses (18, 34) each lie in a plane (ee) perpendicular to the rows (Rv, Rh), wherein in the case of a knife contact strip, the blade contact parts (13 ·) in one row ( Rh) are arranged mirror symmetrically with respect to the knife contact parts (13 ') of the other row (Rv) and the slots (31 1) of the contact knives (13a) at a distance of one quarter of the grating size (R) on either side of the surfaces (ee) (Fig. 8,12,51,53). Method for the production of contact strips according to any one of claims 1-9, wherein a plate hand is punched into a plate lamella band, and wherein identical flat plate lamellae, which are connected by at least one connecting strip of the plate band, at the mutual distance from the the grid dimensions are strung together, and then the plate lamellae are deformed by bending until contact elements are deformed and finally the contact elements are separated from the plate lamella ribbon, characterized in that the plate strip is formed into a two-sided symmetrical plate lamella ribbon (L; L 'in fig. 27). , 43}, the plane of symmetry (zz) of which is parallel to the longitudinal direction 20 (A), which is preferably the rolling direction of the sheet metal strip, which is then turned on both sides of the plane of symmetry (zz) to adjusting legs (10b ' ; 13m ·) with spring contacts (10e) or blades (13a). Punched plate slats (10, 13) symmetrical with respect to the symmetry plane (zz) in such a way as to form of ridges (10a "; 13n ') must be bent over substantially 90 °, that the bending edges (10s; 13s) lie perpendicular to the stitching direction and parallel to the plane of symmetry (zz) and then to the backs (10a'; 13n ') or to the adjustment legs (10b '; 13m') each weld a contact pin (11; 14) or a knife contact part (35). Method according to claim 10, characterized in that the contact pins (11; 14) are each provided with a predetermined breaking point (11b; 14b) at the transition to end sections (11a in Fig. 35; 14a in Fig. 49}), then connect the end portions (11a; 14a) with the aid of a carrier strip (12, 35), then the contact portions (10 ', 13') 35 by intersections along the connecting strip (10F, 13f) from each other 8401325 Λ * separates the contact elements connected to each other through the carrier strip (12; 35) by inserting them into the recesses (18; 34) relative to the plastic component (17; 23) and thereafter inserting the end portions (11a; 14a ) by 5 swiveling away the support strip (12; 35). Method according to claim 10 or 11, characterized in that the contact elements connected to one another by means of a connecting strip (e.g. 35, 12 in fig. 49, 35, 36) are formed into a contact element band (K; K 'in fig. 35, 49) to roll, then unroll 10 portions of the contact element tape (K; K ') of two spaced-apart rollers in opposite directions and to the recesses (18; 34) of both rows (Rv, Rh) of supplies the plastic component (17; 23) arranged between the rollers and introduces them into these recesses by a joint movement and subsequently pivots the connecting strip (eg supporting strip 35; 12). 13. Method substantially as suggested in the description and / or drawings. 13 I CONCLUSIONS I 14. Device substantially as suggested in the description and / or drawings. 8401325