WO2021254551A1

WO2021254551A1 - Electrical contact

Info

Publication number: WO2021254551A1
Application number: PCT/DE2021/000110
Authority: WO
Inventors: Hartmut Wurster; André Weber
Original assignee: Sbs - Stanzprodukte Gmbh
Priority date: 2020-06-19
Filing date: 2021-06-15
Publication date: 2021-12-23
Also published as: EP4169127A1; DE102020003770A1; DE102020003770B4

Abstract

The invention relates to an electrical contact (10) for disconnecting and connecting technical media in connection technology. The electrical contact (10) is produced from a strip-shaped punching material and has: - at least one clamping element (13, 40) with a clamp (14, 50, 51) and - a round contact (12, 30).

Description

Electric contact

description

The invention relates to an electrical contact, in particular a circular connector, for connecting technical media.

State of the art

Connectors in connection technology are used to separate and connect technical media, for example electrical lines. The connecting parts are appropriately aligned by the form fit of the plug parts and are usually fixed in a non-positively releasable manner by spring force. The connecting parts are often additionally secured against unintentional loosening by screwing. The known contacts are often machined from solid material. In the front half they are designed, for example, as a pin contact, that is to say male contact, or as a socket contact, that is to say female contact or female contact, that is to say as a mating connector for the pin contact. In the rear half, these are designed as a solid body in the form of a clamping contact, also called a clamp or screw clamping element. They have a hole, for example at a screw terminal point, so that an electrical conductor can be passed through from behind in the longitudinal axis, and have a thread with a screw running perpendicular thereto. These contacts are mostly manufactured as bulk goods (individual parts). The previous contacts with a screw terminal are mostly manufactured as a single part and refined as bulk material with a uniform surface in bulk good electroplating.

The electrical connectors have terminal points that are standardized in the standard EN 60999-1: 2000, for example. A conductor can be clamped with the screw mentioned above, for example with a screw clamping point. EN 60999-1: 2000 describes an unprepared conductor when the insulation has been removed from the cut end of the conductor before being inserted into a terminal.

These terminal points are parts of terminals that are necessary for the mechanical clamping and electrical connection of the conductor, including the parts that ensure proper contact pressure. The clamping points can, in particular, be screw clamping points, as described, Buchsenklemmstel len, tab clamping points or screwless clamping points such as plug-in clamping points. The terminals of the electrical connectors are conductive parts of a pole with one or more terminal points and possibly the insulation. These contacts are usually made as a turned-milled part made of a turned brass, which is not RoHS-compliant due to the lead content (EU Directive 2011/65 / EU, which restricts the use of certain hazardous substances in electrical and electronic equipment. It regulates the use and the placing on the market of hazardous substances in electrical devices and electronic components), manufactured by cutting. Such electrical contacts can be made with a crimp connection, for example from strip material by punching, bending and deep drawing in progressive tools. The tape material used for this is usually homogeneous, i.e. it has the same material properties everywhere. In particular, an over-spring arrangement, for example made of stainless steel, which is additionally arranged on the contact body is used for the contacts. Such contacts with an over-spring require a high manufacturing and assembly effort with corresponding manufacturing and assembly costs.

A number of tubular contact types are known in the art. There are several solutions for making the contact in one piece with a crimp holder. DE 100 05 297 C2 discloses, for example, a contact piece for a detachable electrical plug connection with a connection area, designed as a crimp connection, for receiving a cylindrical contact pin as a counterpart of the plug connection. The contact element is made from a conductive, permanently elastic strip material and the connection area is also punched out.

After punching, bending and shaping in the forming production process, a connector or a contact arrangement is obtained which has a one-piece crimp connection.

The disadvantage of the known connectors with screw terminals is that the construction with a pin contact or socket contact is costly to manufacture, e.g. as a turned-milled part with a thread, and the contacts as an individual part usually cannot be ennobled in the strip electroplating with selective surfaces . Often the material for the machined part, for the short chips required for machining, has a higher lead content than is permissible in the RoHS.

The object of the invention is therefore to provide an electrical contact or circular connector that is cheaper and easy to manufacture.

Disclosure of the invention

The invention is disclosed by the features of the main claim. Embodiments and further developments are the subject of the further claims following the main claim.

An electrical contact, in particular a circular connector, is disclosed which is produced in one piece from a strip-shaped starting material. On the one hand, this has a round contact, which is formed as a stamped-rolled round contact, also called stamped-roll contact, in the form of a socket contact (female contact) or a pin contact (male contact). On the other hand, this has a terminal that is designed as a screw terminal or a plug-in terminal with a terminal point. The clamp is a stamped and bent part and is punched out of the strip-shaped starting material in a hollow shape as a "box" with a thread and bent. This hollow “box” is therefore not a solid part as in the prior art, but a hollow shape produced as a stamped and bent part. The electrical contact, in particular the circular connector, is thus designed as a one-piece combination of a circular contact with a screw clamping element, which is punched from a strip material, the machining being omitted. A strip-shaped starting material is used that does not have any lead content that is subject to RoHS declaration, whereby the stamped electrical contact, in particular the circular connector, is manufactured in a RoHS-compliant manner.

The combination of a graduated band material miniaturizes the stamped part by making the thread in a thicker threaded block and making the walls of the clamp from thinner material. As a result of the design as a part, the construction as a stamped part is more cost-effective and less complex to manufacture than the state-of-the-art form previously produced by machining. The strip material is formed from, for example, a step-milled, step-rolled or step-welded strip. It serves as a starting material and is rolled, welded, milled or processed using other suitable processes. The tape as the starting material is designed as a stepped tape and has, on the one hand, a thick part in which a thread is formed in the contacts with screw terminals, and on the other hand a thin part Part that is designed as a contact on. A strip material with a uniform thickness can also be used for the contacts with plug-in terminals. The band material can also be joined together from different materials by welding, for example. As a result, different material properties can be achieved in individual areas of the round contact and the clamping point. On the front of the electrical contact or circular connector, a circular contact is designed as a stamping and rolling contact in the form of a pin contact, i.e. a male contact or male contact, or as a socket contact, i.e. a female contact or female contact. The “box” is formed in its hollow shape on the rear side of the round contact.

The terminals are, for example, semicircular contacts in a U-shape or some other box-shaped contour in which sheet metal is bent into a hollow body. One side can be designed as a cover, which can optionally have a lock and cutouts. The thick part with the thread is punched out as an extension of a box wall or a lid and bent into the box from one side. The box is latched to the side with a threaded piece. The thread is located in a tab, and windows can be formed in the wall of the box to the right and left of the threaded piece. The tape material is bent and folded into the appropriate shape. One or more tabs can be punched at the side ends of the box. The device can be locked with the tabs and is then self-contained. Alternatively, instead of the Verras device, the other side can also be folded over, with two tabs being formed. The tabs have a through hole. This training is stabilized by a screw that goes through the two holes and is screwed into the threaded piece. The devices can have a wire protector. This is done in that a tab can also be formed on the front of the “box”. This flap can also be folded in. The wire protection is formed on the front of the "box". This wire protection lies between the screw and the inserted strands so that the strand cannot be damaged when the screw is tightened. The bent end of the wire protection ensures trouble-free threading of the conductor. Locking can take place in that a blunt press-fit is carried out according to the keyhole principle. This can be done, for example, by a dovetail shape or similar. The clamp can also be implemented without a screw, that is to say by means of a clamp connection made from sheet metal, also known as a plug-in clamp. The screwless terminal point has the advantage that no screw has to be inserted afterwards, but the connection is made by inserting and clamping the conductor, also called wire. Due to the design as a one-piece clamping connection and as a one-piece design of the clamping connection and the round contact, the construction is less complex than the multi-part design of the prior art.

The one-piece electrical contact according to the invention, in particular the circular connector, in combination with a plug-in terminal with screwless clamping point and a stamped-rolled circular contact has the advantage that the one-piece component is easier to handle and more cost-effective to manufacture than other solutions from the prior art. By using the graduated strip material, miniaturization is achieved compared to a stamped part made of a uniform material thickness. The electrical contact, in particular the circular connector, is stamped from a strip material, which eliminates the otherwise usual machining, and the terminal as a one-piece stamped part, namely the screw terminal point with a screw, or screwless terminal point, e.g. according to EN 60999-1, from a stamped strip can be produced. As an extension of the terminal, the electrical contact, in particular the circular connector, is optionally connected to the punched strip as a strip product opposite the circular contact. This has the advantage that technically better selective surface combinations, e.g. sub-nickel plating with silver-tin-gold combinations, can then be applied, in contrast to the uniform coatings previously applied in bulk material electroplating. Another advantage is that the connection to the punched strip, which is also called the carrier strip or connection, enables fully automatic further processing connected to the carrier strip from the reel. The contact can also be separated as bulk material for manual loading.

Different designs can therefore be produced. These are in particular a design of round contacts with a clamping point as Stamped part, also from one piece; a combination of a stamped-rolled contact with a screw terminal point with or without a wire guard; a combination of a stamped-rolled contact with a push-in terminal; a stamped-rolled contact with a terminal without wire protection or with a one-piece wire protection; a stamped-rolled contact with a screwless nip in one piece; a punching and folding principle with the step of folding a thicker end with a thread into the body of thinner sheet metal; a punching and folding principle with rolling a thread and combining with the above contacts; a punching and folding principle by Verrie gelung and stiffening by setting the thicker end in a window in the side wall; a punching and folding principle by bending a tab as a clamp with wire protection; a bent end of a wire guard for trouble-free threading of the conductor; a punching and folding principle with locking and stiffening by two or more overlapping tabs with a threaded through hole or a punching and folding principle of a contact with screwless clamping points. A high level of stability is achieved in the direction of force. A plug-in clamping point can have a raised contact point for better electrical contact below the clamping lugs. A plug-in clamping point can have curved or round cut-out clamping lugs, which have better clamping and better electrical contact.

A plug-in terminal point can be formed in which an optional extension of the body can be used for guiding and stabilizing the conductor when it is inserted into the terminal point.

Different types of clamping lugs, a first lug, a second lug and a third lug, can also be combined with one another and clamp the conductor on one side in an area or on both sides in a clamping area. This property can be enhanced by arranging several, even different, terminal points. This has the advantage that no screw is used and the conductor only has to be inserted into the plug-in clamping element. The connection is thus already completed. An additional tightening of a screw is therefore no longer necessary.

Furthermore, a punch-and-fold principle can be implemented in which the electrical contact, that is to say in particular the circular plug connector, is manufactured connected as tape, with technically better surface combinations then such as nickel, tin, gold, silver can be applied and fully automatic further processing from the strip is made possible. The punch and fold principle can be designed in such a way that the electrical contacts or circular connectors can also be separated as bulk goods for manual assembly.

The problem is solved, among other things, that the stamped part is cheaper to manufacture and both as a single part for bulk electroplating, as well as tied to the stamped strip, for a possibly technically better selective refinement in the strip electroplating, and made of a RoHS-compliant material can.

Further advantages and advantageous refinements of the invention can be found in the following description of the figures, the drawings and the claims.

An exemplary embodiment of the solution according to the invention is explained in more detail below with reference to the accompanying schematic drawings. It shows:

1 shows an electrical contact in the form of a round plug connector in the form of a pin contact with a screw terminal point and the optional wire protection and the folding principle of a threaded piece in a sectional side view,

Fig. 2 shows the electrical contact as a round plug connector from Fig. 1 with the lateral locking of the threaded piece in the recess of the side wall in the side view,

Fig. 3 shows the electrical contact as a circular connector from Fig. 1 without a screw in a top view,

FIG. 4 shows the electrical contact as a round plug connector from FIG. 1 with the screw mounted in an isometric view from the front.

FIG. 5 shows the electrical contact as a round plug connector from FIG. 1 without a screw in an isometric view from behind.

6 shows an electrical contact as a round plug connector in the form of a socket contact with a screw terminal point and an optional wire protection as well as the mounted screw and with the folding principle of the threaded piece in a section of the side view,

Fig. 7 shows the electrical contact as a round plug connector from Fig. 6 with a lateral locking of the threaded piece in the recess of the side wall in the side view,

FIG. 8 shows the electrical contact as a round plug connector from FIG. 6 without a screw in a top view,

FIG. 9 shows the electrical contact as a round plug connector from FIG. 6 with the screw mounted in an isometric view from the front. ok

FIG. 10 shows the electrical contact as a round plug connector from FIG. 6 without a screw in an isometric view from behind.

11 shows the electrical contact as a round plug connector with overlapping tabs in the form of a pin contact with a screw terminal point with a screwed-in screw, an optional wire protection and with the folding principle of the threaded piece in a sectional side view,

Fig. 12 shows the electrical contact as a round plug connector from Fig. 11 without the mounted screw in a side view,

FIG. 13 shows the electrical contact as a round plug connector from FIG. 11 without the installed screw in a top view.

FIG. 14 shows the electrical contact as a round plug connector from FIG. 11 with the screw mounted in an isometric view from the front,

Fig. 15 shows the electrical contact as a circular connector from Fi. 11 without screw in an isometric view from behind,

16 shows the electrical contact as a round plug connector with overlapping tabs, in the form of a socket contact, with a screw clamping point, with a screwed-in screw, an optional wire protection and with the folding principle of the threaded piece in a section from the side view,

FIG. 17 shows the electrical contact as a round plug connector from FIG. 16 without the installed screw in a side view,

Fig. 18 shows the electrical contact as a round plug connector from Fig. 16 without the mounted screw in a top view,

19 shows the electrical contact as a round plug connector from FIG. 16 with the screw mounted in an isometric view from the front, FIG. 20 shows the electrical contact as a round plug connector from FIG. 16 without a screw in an isometric view from behind.

21 shows the electrical contact as a round plug connector in the form of a pin contact with plug-in terminal points, i.e. screwless terminal points, in an isometric view from the front; it also shows, symbolically indicated by an arrow, the possible extension of a box for a demonstration of a conductor to be inserted,

FIG. 22 shows the electrical contact as a round plug connector from FIG. 21 in a side view in section,

23 shows the electrical contact as a round plug connector from FIG. 21 in a side view,

FIG. 24 shows the electrical contact as a round plug connector from FIG. 21 in a top view,

Fig. 25 shows the electrical contact as a round plug connector in the form of a socket contact with a plug-in terminal point, i.e. a clamping element without a screw in an isometric view from the front; it also shows the possible extension of the box for a demonstration of a plug-in, symbolically indicated by an arrow the head,

FIG. 26 shows the electrical contact as a round plug connector from FIG. 21 in a side view in section,

FIG. 27 shows the electrical contact as a round plug connector from FIG. 21 in a side view,

FIG. 28 shows the electrical contact as a round plug connector from FIG. 21 in a top view, 29 shows, for the electrical contacts as round plug connectors from FIGS. 1 - 28, an example of a possible connection to a carrier strip on the socket contact with plug-in clamping elements from FIG.

30 shows the electrical contacts connected to the carrier strip as circular connectors in an isometric view from the front,

31 shows the electrical contacts connected to the carrier strip as round plug connectors in an isometric view from the rear,

32 to 36 show an embodiment of the invention for a pin contact, with an inwardly formed collar and thread

37 to 41 show an embodiment according to the description of the figures 32 to 36 of the invention for a socket contact,

42 to 46 show a further embodiment of the invention for a pin contact, with an outwardly formed collar and thread.

47 to 51 show the embodiment of the invention according to FIGS. 42 to 46 for a socket contact.

In Fig. 1, an electrical contact 10 is shown in a design as a circular connector 10. The electrical contact or circular connector 10 has a combination of a stamped-rolled circular contact in the form of a pin contact 12 and a screw clamping element 13, see the identification of areas shown in FIG. 2, for example in the form of a clamping point for a screw element, i.e. a screw clamping point 14 as a clamp. The round contact can be designed as a pin contact, as shown in FIGS. 1-5, or as a socket contact, as shown in FIGS. 6-10. The electric one Contact 10 in the training as a circular connector 10 is made from one piece. For this purpose, a strip material is used which, after rolling, possibly from different suppliers, is given a stepped material thickness. This gradation is produced, for example, by milling a thicker strip or by stepping a strip or by welding different strips of different thicknesses. Likewise, a strip material can be used for the electrical contact 10, which is also assembled from different materials, for example by welding. As a result, various material properties such as spring force, electrical conductivity, strength, flexibility can be achieved in individual areas of a round contact and a terminal point. The electrical contact 10 or circular connector 10 is made from this material as a stamped part from one piece. The front half is designed as a round contact either in the form of a pin contact 12, as shown here, or as a socket contact 30 (see FIG. 6). The pin contact 12 has, for example, a continuous transition 16 to a rear half, which is designed as a hollow box 18. This rear half with the hollow box 18 is bent as a body like a frame into a U-shape or some other polygonal shape to a box as a punched and bent part in a hollow shape and one side is bent over the box 18 on its top as a cover or first lid 20. An open joint can, if necessary, be stiffened by a locking device 36, see FIG. By an offset 37, see Fig. 2, the Be tenwandung inwardly, for example, a U-shaped outer contour of the box 18 can be achieved without a protrusion. The box has, for example, a similar U-shaped outer contour to the screw terminal contacts common on the market, which are designed in round connectors with a screw terminal, for example according to EN 60999, as a turned-milled part. The required thread 22 is introduced into a threaded piece 26 which connects to a rear bracket 24. The rear flap 24 is attached to a cover 20. The subsequent threaded piece 26 is adjusted or bent into the hollow box 18 via a bend in the tab 24. The turning is symbolically represented by an arrow. This threaded piece 26 is wider than the inner width of the box 18. As a result, when the box 18 is bent, the threaded piece 26 latches laterally in the recesses 28 of the side wall 27 of the box 18, see FIG. 2 the thicker side of a step band used is selected for the necessary thread depth and the thread 22 in a punching tool into the corresponding side during the punching process the terminal point 14 introduced. At the same time, to miniaturize the box 18, the thin side of the material is used for the side walls 27 and the first cover 20. Another sheet metal can be connected to the front side of the first cover 20 as a wire protector 56, which is now also bent into the body of the hollow box 18 opposite the threaded piece 26 and ends only after the thread 22. This bent-in element lies below the threaded piece 26 and serves as wire protection between a screwed-in screw and a conductor, in particular in the case of multi-wire conductors or individual strands. The bent end of the wire protector 57 ensures trouble-free threading of the conductor.

FIG. 2 shows the electrical contact 10 as a round plug connector 10 from FIG. 1 with the punched-out recess 28 in the side wall 27 and the threaded piece 26 locked therein in a side view. 2 also shows the offset 37 of the side wall 27 for the latching 36 without a protrusion.

FIG. 3 shows the top view of the electrical contact 10 as a round plug connector from FIG. 1. A through hole 23 is made in the first cover 20.

This can be done by punching. Below is the threaded piece 26, see. Fig.

1, into which the thread 22 for the screw to be inserted is introduced. This is done, for example, by rolling during the punching process. The threaded piece 26 can be pressed or bent into two opposite holes or recesses 28 which are arranged on the sides of the U-shaped hollow box 18 at the side. A stable contact in the direction of the screw 38 to be screwed into the thread 22, see FIG. 1, is thereby achieved. The hollow box 18 can be connected by means of one or more locking devices 36, which increases the stability. This locking 36 can take place through a set tab in a hole, for example by a dovetail or keyhole lock, or by a tab punched out perpendicular to the strip material, which is pressed into a hole in the sheet metal above it.

FIG. 4 shows the electrical contact 10 as a round plug connector from FIG. 1 with mounted screw 38 in an isometric view from the front. You can see the lock 36, which stiffens the joint. By an offset 37 of the side wall inwardly, a U-shaped outer contour of the box 18 without Supernatant can be achieved. The threaded piece 26 can also be seen, which is pressed or bent into the holes or recesses 28 laterally on the flanks of the U-shaped box 18. The connection of a wire protector 56 to the first cover 20 can also be seen.

FIG. 5 shows the electrical contact 10 as a round plug connector from FIG. 1 without a screw in an isometric view from behind. In this view, a U-shaped design of the box 18 can be seen, for example. The tab 24 is arranged at the rear of the first cover 20, then the threaded piece 26 is carried out and is set in the hollow box 18 via a bend. The bent end of the wire guard 57 can also be seen.

Fig. 6 shows an electrical contact 10 as a round plug connector with a round contact in the form of a socket contact 30 with a screw clamping element 13, see Threaded piece. The electrical contact 10 in the form of a circular connector 10 is made from one piece. In a modification of FIGS. 1-5, the round contact in FIGS. 6-10 is designed as a socket contact 30.

7 shows the electrical contact 10 as a round plug connector from FIG. 6 with the punched out recess 28 of the side wall 27 and the threaded piece 22 locked therein. FIG. 7 also shows the offset 37 of the side wall 27 for the locking 36 without protrusion.

FIG. 8 shows the electrical contact 10 as a round plug connector from FIG. 6 with a round contact as a socket contact 30. A through hole 23 is made in the first cover 20. This can be done by punching. Below is the threaded piece 26, see FIG. 6, into which the thread 22 for the screw to be inserted is introduced. This is done, for example, by rolling during the punching process.

FIG. 9 shows the electrical contact 10 as a round plug connector from FIG. 6 with a round contact as a socket contact 30 with a mounted screw 38 in an isometric view from the front. You can see the lock 36, which is the joint stiffened. An inward offset 37 of the side wall enables a U-shaped outer contour of the box 18 without a protrusion to be achieved. The threaded piece 26 can also be seen, which is pressed or bent into the holes or recesses 28 laterally on the flanks of the U-shaped box 18. The connection of a wire protector 56 to the first cover 20 can also be seen.

FIG. 10 shows the electrical contact as a round plug connector from FIG. 6 without a screw. In this view, a U-shaped design of the box 18 can be seen, for example. The tab 24 is arranged at the rear of the first cover 20, then the threaded piece 26 is carried out and is set in the hollow box 18 via a bend. The bent end of the wire guard 57 can also be seen. The round contact can be designed as a pin contact, as shown in FIGS. 11-15, or as a socket contact, as shown in FIGS. 16-20.

11 shows a side sectional view of the electrical contact 10 as a round plug connector as a one-piece combination of the round contact 12 and the screw clamping element 13 with the screw 38 mounted. In a modification of FIGS wider threaded piece 26, see FIGS. 2 and 7, stiffening is achieved by two overlapping tabs 32 and 33. The screw 38 stabilizes and connects the curved body of the hollow-shaped box 18 to form a unit and also serves to clamp an inserted conductor. The overlapping upper flap 32 and the lower flap 33 underneath are formed from the two ends of the side wall of the curved hollow-shaped box 18. A through hole 23 for the screw 38 is made in each bracket 32 and 33. At least one tab 24 is arranged on the rear of the cover 33 or 32, followed by the threaded piece 35, which is narrower than the inner width of the hollow-shaped box 18. This threaded piece 35 is set or bent into the hollow box 18 via a bend. The screws 38 built into the two holes 23 during assembly stabilize and stiffen the threaded piece 35 with the upper 32 and lower, further tab 33 and thus with the entire hollow box 18 to form a unit and at the same time serve to clamp an inserted conductor so that high stability is achieved in the direction of force. On the front side of the tabs 32 or 33, another sheet metal can be connected as a wire protection 56, which is now also bent into the body of the hollow box 18 opposite the threaded piece 35 of the thread 22 and only after the thread 22 with a bent end of the wire protection 57 ends. This bent element from the end of the wire protector 57 lies below the threaded piece 35 and serves as a wire protector between a screwed-in screw 38 and a conductor, especially in the case of multi-wire conductors or individual strands. The bent end of the Drahtschut zes 57 ensures trouble-free threading of the conductor. An open joint can, if necessary, be further stiffened by a lock 36, see FIG.

FIG. 12 shows the electrical contact 10 as a round plug connector from FIG. 11 with the combination of the round contact in the embodiment as a pin contact 12 and the screw clamping element 13 without screws.

13 shows the electrical contact 10 as a round plug connector in an embodiment with the round contact in the embodiment as a pin contact 12. The through hole 23 is made in the upper tab 32 and in the tab 33 below. This is done, for example, by punching. The threaded piece 35, into which the thread 22 for the screw 38 to be inserted, is inserted, is located below the aforementioned brackets 32 and 33. This is done, for example, by rolling during the punching process. The hollow box 18 can be connected by means of one or more locks 36, which increases the stability. This locking 36 can take place through a set tab in a hole, for example by a dovetail or keyhole lock, or by a tab punched perpendicular to the tape material, which is pressed into a hole in the tape running above it.

14 shows the electrical contact 10 as a round plug connector from FIG. 11 with the screw 38 installed. The upper tab 32 and the front edge of the lower tab 33 as well as the lock 36, which can stiffen the two tabs 32, 33, can be seen. The connection of the wire protection 56, for example to the la 33, can also be seen. FIG. 15 shows the electrical contact 10 as a round plug connector from FIG. 11 without a screw. In this view, the U-shaped design of the hollow box 18 can be seen. The tab 24 is arranged at the rear, for example on the lower tab 33. The threaded piece 35 is then carried out and is set in the hollow box 18 via a bend. Furthermore, the outlet of the wire guard 56 can be seen with its bent end 57 at the end of the hollow box 18.

16 shows the electrical contact 10 as a round plug connector as a one-piece combination of the round contact 12 and the socket contact 30 and the screw clamping element 13, see FIG. 17 with the screw 38 mounted. The screw 38 stabilizes and connects the curved body of the hollow-shaped box 18 to form a unit and at the same time serves to clamp an inserted conductor. In a modification of FIGS. 11-15, the round contact in FIGS. 16-20 is designed as a socket contact 30. The overlapping upper flap 32 and the lower flap 33 underneath are formed from the two ends of the side wall of the curved hollow-shaped box 18. A through hole 23 for the screw 38 is made in each bracket 32 and 33. At least one tab 24 is arranged on the rear of the cover 33 or 32, followed by the threaded piece 35, which is narrower than the inner width of the hollow-shaped box 18. This threaded piece 35 is set or bent into the hollow box 18 via a bend. The built-in through the two holes 23 during assembly screws 38 stabilized and stiffened the threaded piece 35 with the upper 32 and lower, further tab 33 and thus with the entire hollow box 18 to form a unit and at the same time serves to clamp an inserted conductor, see above that a high level of stability is achieved in the direction of force. On the front side of the La's 32 or 33, another sheet metal can be connected as a wire protection 56, which is now opposite the threaded piece 35 of the thread 22 also bent into the body of the hollow box 18 and only after the thread 22 with a bent end of the Wire guard 57 ends. This bent element from the end of the wire protector 57 lies below the threaded piece 35 and serves as a wire protector between a screwed-in screw 38 and a conductor, in particular in the case of multi-wire conductors or individual strands. The bent end of the wire protector 57 provides a trouble-free it threading the conductor safely. An open joint can, if necessary, be further stiffened by a lock 36.

FIG. 17 shows the electrical contact 10 as a round plug connector from FIG. 16 without the installed screw.

FIG. 18 shows the electrical contact 10 as a round plug connector from FIG. 16 without the installed screw. The through hole 23 is made in the upper bracket 32 and the bracket 33 below. This is done, for example, by punching. The threaded piece 35, into which the thread 22 for the screw 38 to be inserted, is inserted, is located below the aforementioned brackets 32 and 33. This is done, for example, by rolling during the punching process. The hollow box 18 can be connected by means of one or more locks 36, which increases the stability. This locking 36 can take place through an adjusted tab in a hole, for example by a dovetail or keyhole lock, or by a tab punched out perpendicular to the tape material, which is pressed into a hole in the tape running above it.

19 shows the electrical contact 10 as a round plug connector from FIG. 16 with the screw 38 installed. The upper tab 32 and the front edge of the lower tab 33 as well as the lock 36, which can stiffen the two tabs 32, 33, can be seen. The connection of the wire protection 56 to the tab 33, for example, can also be seen.

Fig. 20 shows the electrical contact 10 as a circular connector from Fig. 16 without a screw as a socket contact 30. In this view, the U-shaped training of the hollow box 18 can be seen. The flap 24 is arranged at the rear, for example on the lower flap 33. The threaded piece 35 is then carried out and is set in the hollow box 18 via a bend. Furthermore, the outlet of the wire guard 56 can be seen with its bent end 57 at the end of the hollow box 18.

21 shows an electrical contact 10 as a round plug connector as a combination of a round contact in the embodiment with a pin contact 12 with a plug-in clamping element 40, cf. clock, as shown in FIGS. 21-24, or as a socket contact, as shown in FIGS. 25-28. This plug-in clamping element 40 is designed with one or more plug-in clamping points 40, in which one or more Klemmla rule, a first clamping tab 47, a second clamping tab 48, a third clamping tab 49 clamp the conductor. In a modification of the screw clamping elements shown in FIGS. 1 to 20, it does not require a screw and can also be produced from a material of uniform thickness. Likewise, a strip material can be used for the electrical contact 10 which, for example, can also be assembled from different materials by welding. This enables different material properties such as spring force, electrical conductivity, strength, flexibility in individual areas of the round contact and the clamping point to be achieved. The electrical contact 10 is designed as a combination of a round contact in the form of a pin contact 12 and a clamping point, for example in accordance with EN 60999 in a design as a plug-in clamping element 40. The plug-in clamping element 40 is formed. The plug-in clamping element 40, see FIG. 22, is designed punched out of one piece together with the round contact in the form of a pin contact 12. The front half is designed as a round contact in the design of the pin contact 12 and has, for example, a continuous transition 16 to the rear half, that is to say the hollow box 18 with the plug-in clamping element 40. The body of this rear half is bent as a frame in a U-shape or some other polygonal shape, similar to the previous contour of the turned-milled parts. An optional extension of the body 45, marked with an arrow, can be used to guide and stabilize the conductor when it is inserted into the terminal point. In the upper area, one side is bent over the hollow box 18 as a third cover 44 and the joint, which may be open, is stiffened by one or more locks 46. This locking 46 can take place through an adjusted tab in a hole, for example by a dovetail or keyhole lock, or by a tab punched out perpendicular to the strip material, which is pressed into a hole in the sheet metal above it. By means of an inward offset 37 of the side wall, for example a U-shaped outer contour of the hollow box 18 without a protrusion can be achieved. Clamping lugs, that is to say first, second and third lugs 47 to 49, are bent into the plug-in clamping element 40 from one or more sides. These clamping lugs ensure, possibly in interaction with the wall, for the mechanical clamping and electrical contact of the Terminal point. By aligning the clamping lugs, a conductor can be plugged in in the plugging direction; contrary to the plugging direction, these clamping lugs have a self-locking effect and prevent the conductor from being pulled out. At the same time, these clamping lugs establish contact with the conductor. These clamping lugs, that is to say first, second and third lugs 47 to 49, can press on the conductor on one side, shown in FIG. 22 in the one-sided clamping area 50. Likewise, these clamping lugs, first, second and third lugs 47 to 49, can clamp the conductor from two sides, shown in FIG. 24 in the two-sided clamping area 51. A combination of one-sided and two-sided clamping lugs is possible. The clamping tabs 47 and 48 are connected on one or both sides from above, below, and from the side walls in each case at the front or rear as a tab as an extension to the walls of the hollow box 18 or the cover 44 and bent into the cavity. The clamping strap attached to the front, the first strap 47, and the clamping strap attached to the rear, the second strap 48, are bent in such a way that they lock against the pull-out direction of the inserted conductor. Alternatively, the clamping lugs, the third lugs 49, can be punched out of the walls of the hollow-shaped box 18 or the cover 44 and bent into the cavity. The clamping lugs, the third lugs 49, are punched out in this way and placed in the cavity of the hollow-shaped box 18. That these lock against the pull-out direction of the inserted conductor. The clamping lugs, that is, first, second and third lugs 47 to 49, can be arched in the clamping area 50 and 51 or made with a circular cutout and thus create a better clamping of the electrical line with a round contour of the conductor, for example. All types of clamping lugs, that is to say first, second and third lugs 47 to 49, can be combined with one another and clamp the conductor on one side in the one-sided clamping area 50 or on both sides in the two-sided clamping area 51. This property can be enhanced by arranging several, even different, terminal points. The terminal points can be arranged in any order. This has the advantage that no screw is used and the conductor only has to be inserted into the plug-in clamping element 40. The connection is thus already completed. An additional tightening of a screw is therefore no longer necessary. The plug-in clamping element 40 is suitable for rigid single-wire conductors or multi-wire conductors that are connected, for example, to a wire end sleeve. Single strands would not have the necessary stability bring yourself. Individual strands can only be inserted into the clamp using an additional insertion tool.

FIG. 22 shows the electrical contact 10 as a round plug connector from FIG. 21 in cross section. A clamping strap attached to the front, the first strap 47 and / or a clamping strap attached to the rear, the second strap 48, can clamp the conductor in an area with one-sided clamping, the one-sided clamping area 50. The section also shows a clamping tab punched from the side wall, the third tab 49, and a clamping tab with a round cutout 64 at the end of the tab. The continuous transition 16 of the round contact in the form of a pin contact 12 to the hollow box 18 of the plug-in terminal point 40 can also be seen, for example. An increased contact point 66 can ensure better electrical contact below the clamping lugs. Arched clamping lugs 62, see FIG. 24, or clamping lugs 64 cut out in a round manner can achieve better clamping or electrical contacting.

23 shows the electrical contact 10 as a round plug connector from FIG. 21 with clamping lugs punched out laterally from the walls, the third lugs 49. The clamping lugs punched out of the walls, the third lugs 49, the conductor with a one-sided clamping area 50, see FIG. 22, or also as an opposing clamping area 51 on both sides, see FIG.

Fig. 21, clamp the conductor.

24 shows the electrical contact 10 as a round plug connector from FIG. 21 with clamping lugs punched out of the sides, the third lugs 49. The clamping lugs punched out of the walls, the third lugs 49, represent a clamping area 51 on both sides the clamping lugs 47 to 49 can be lifted from the conductor by means of a release tool introduced into the hollow-shaped box 18 of the electrical contact 10, the circular connector, after the conductor has been assembled, and the connection thus released.

25 shows the electrical contact 10 as a round plug connector in the form of a socket contact 30, that is to say a clamping element without a screw; it also shows, symbolically indicated by an arrow, the possible Extension of the box for a demonstration of a conductor to be inserted. It does not require a screw and can also be made from a material of uniform thickness. Likewise, a strip material can be used for the electrical contact 10 which, for example, can also be assembled from different materials by welding. This enables different material properties such as spring force, electrical conductivity, strength, flexibility in individual areas of the round contact and the terminal point to be achieved. In a modification of FIGS. 21-24, the round contact in FIGS. 25-28 is designed as a socket contact 30.

FIG. 26 shows the electrical contact 10 as a round plug connector from FIG. 25 with a socket contact 30 without a screw. A clamping strap attached to the front, the first strap 47 and / or a clamping strap attached to the rear, the second strap 48, can clamp the conductor in an area with one-sided clamping, the one-sided clamping area 50. The section also shows a clamping tab punched out of the side wall, the third tab 49, and a clamping tab with a round cutout 64 at the end of the tab.

27 shows the electrical contact 10 as a round plug connector from FIG. 25 with a socket contact with clamping lugs punched out of the sides from the walls, the third lugs 49 One-sided clamping area 50, see FIG. 22, or also as an opposing two-sided clamping area 51, see FIG. 25, clamp the conductor.

FIG. 28 shows the electrical contact 10 as a round plug connector from FIG. 25 in the version with a socket contact 30 with clamping tabs punched out of the walls, the third tabs 49 Clamping area 51. Furthermore, the clamping lugs 47 to 49 can be lifted from the conductor by means of a release tool inserted into the hollow-shaped box 18 of the electrical contact 10, the circular connector, after the conductor has been assembled, thus releasing the connection.

29 shows the electrical contact 10 as a round plug connector from FIGS. 1 to 28 in the embodiment as a socket contact 30 with a plug element from FIG. 25 shows a possible connection to a carrier strip 60 in plan view, for strip-galvanic finishing and fully automatic further processing. The electrical contact 10 is connected to the rear end of the hollow box 18 via a connecting web 58 on the carrier strip 60.

30 shows the electrical contact 10 connected to the carrier strip 60 as a round plug connector.

31 shows the electrical contact 10 connected to the carrier strip 60 as a round plug connector.

FIGS. 32 to 36 show an exemplary embodiment of the invention for a pin contact.

32 shows a thread 70 which has been rolled into an inwardly formed collar 72. The collar 72 can be exhibited in a cover 71 or a wall of the hollow-shaped box 27. The function of the collar 72 is that it extends the thread length in relation to the material thickness. The cover 71 can be separated from the previous cover 20 by a cutout or the like so that it can be locked better.

33 shows a latching 74 of the cover 71 in an opening of the side wall of the hollow box 27. If there is a corresponding space requirement, a further opening 76 can be punched for the formed collar of the thread. The cutout 84 allows the cover to be bent without distortion.

FIG. 34 shows the associated top view with the formed collar 72 and the flexural cutout 84.

35 shows the isometric view of FIGS. 32 to 34. This shows a raised side wall 78 in the area of the threaded piece, which runs in a plane with the cover 20 so that it can be inserted into a plastic body without resistance 36 shows the isometric view of FIGS. 32 to 34. This shows a raised side wall 78 in the area of the threaded piece, which runs in a plane with the cover 20, so that it can be inserted into a plastic body without resistance. The formed collar 72 and the clearance 84 for the threaded piece and the cutout 73 can also be seen.

37 to 41 show an embodiment according to the description of the figures 32 to 36 of the invention for a socket contact.

42 shows a thread 70 which has been rolled into an outwardly shaped collar 80. The collar can be issued in a cover 71 or a wall. The cover 71 can be separated from the previous cover 20 by a cutout or the like so that it can be locked better.

43 shows two locking tabs 82 which anchor the cover with the formed thread in a non-positive manner in a clearing 84 of the side wall of the hollow-shaped box 27. The latching tabs can, for example, have a T-shape, omega shape, a dovetail shape or some other shape.

FIG. 44 shows the associated top view with the outwardly shaped collar 80, the bent-in latching tabs 82 and the cutout 84.

45 shows the isometric view of FIGS. 42 to 44. This shows that the threaded piece runs in one plane with the cover 20, so that it can be inserted into a plastic body without resistance

46 shows the mutual isometric view of FIGS. 42 to 44. This shows that an outwardly positioned threaded sleeve 80 runs below or equal to the height of the cover 20 so that it can be inserted into a plastic body without resistance. Another free cut 84 can also be seen under the threaded socket, which enables the cover to be bent and prevents the thread from being distorted during bending.

47 to 51 show the embodiment of the invention according to FIGS. 42 to 46 for a socket contact. All of the features shown in the description, the following claims and the drawings can be essential to the invention both individually and in any combination with one another.

List of reference symbols

10 circular connectors

12 Round contact in the form of a pin contact

13 screw clamp

14 screw terminal point [clamp] 16 continuous transition 18 hollow-shaped box 20 first cover cover 22 thread

23 through hole

24 rear flap 26 threaded piece

27 side wall

28 Recess 30 Round contact designed as a socket contact

32 top tab

33 lower flap

34 overlapping tabs

35 threaded piece

36 first lock

37 Offset side wall when locking

38 screw 40 plug-in clamping element

44 third cover

45 extension of a body

46 second interlock

47 first tab: clamping tab tied at the front and curved

48 second tab: clamping tab tied at the back and bent

49 Third tab: clamping tab punched out of the wall

50 one-sided clamping area [clamp]

51 two-sided clamping area [clamp] 54 U-shaped area

56 wire protection

57 bent end of wire guard

58 Connecting web to the carrier strip

60 carrier strips

62 curved clamping lug

64 Clamping lug cutout

66 raised contact point

70 thread

71 second cover cut free to cover 20

72 inwardly molded collar

73 Free cut between covers

74 Clearance for locking threaded piece

76 Clearance for the collar of the thread

78 raised wall

80 outwardly shaped collar

82 locking tabs

84 Free cut for bending

Claims

Expectations

1. Electrical contact (10) for separating and connecting technical media in connection technology, characterized in that the electrical contact (10) is made from a strip-shaped punching material, and at least one clamping element (13, 40) with a clamp (14 , 50, 51) and a round contact (12, 30), the round contact (12, 30) and the clamping element (13, 40) being punched out of one piece for a conductor and the screw clamping element (13) or the plug-in clamping element ( 40) is designed as a hollow box (18) and is formed and bent from the strip-shaped punching material and the hollow box (18) has first locks (36) and / or second locks (46) for connecting.

2. Electrical contact (10) according to claim 1, characterized in that the electrical contact (10) is designed as a circular connector.

3. Electrical contact (10) according to one of claims 1 or 2, characterized in that the round contact (12, 30) is designed as a pin contact (12) or as a socket contact (30).

4. Electrical contact (10) according to one of the preceding claims, characterized in that the electrical contact (10) has at least one clamping element (13, 40) for a conductor, which as a combination of the round contact (12, 30) and a terminal ( 14, 50, 51) is formed from one piece.

5. Electrical contact (10) according to one of the preceding claims, characterized in that the round contact (12, 30) and the screw clamping element (13) are designed as a combination and from one piece.

6. Electrical contact (10) according to one of the preceding claims 1 to 5, characterized in that the round contact (12, 30) and a plug-in clamping element (40) are formed in one piece.

7. Electrical contact (10) according to claim 6, characterized in that the plug-in clamping element (40) is made of a welded strip material which is made of at least two materials with different material properties.

8. Electrical contact (10) according to claim 6 or 7, characterized in that the plug-in clamping element (40) is formed in one piece.

9. Electrical contact (10) according to claim 5, characterized in that the screw clamping element (13) is made of a welded strip material which is made of at least two materials with different material properties.

10. Electrical contact (10) according to claim 5 or 9, characterized in that the screw clamping element (40) is formed in one piece.

11. Electrical contact (10) according to one of the preceding claims, characterized in that the strip-shaped punching material is formed from a step-milled, step-rolled or step-welded strip.

12. Electrical contact (10) according to one of the preceding claims, characterized in that the screw clamping element (13) has a threaded piece (26) with a thread.

13. Electrical contact (10) according to one of the preceding claims, characterized in that the hollow-shaped box (18) with clamping lugs (47, 48, 49) is formed from the strip-shaped punching material and is bent.

14. Electrical contact (10) according to one of the preceding claims, characterized in that the hollow-shaped box (18) has a U-shaped, rectangular gene, square or polygonal area (54).

15. Electrical contact (10) according to one of the preceding claims, characterized in that the hollow-shaped box (18) has a cover in the form of a first cover (20).

16. Electrical contact (10) according to one of the preceding claims, characterized in that the first locks (36) and the second Verriege lungs (46) through a set upper tab (32) in a through hole (23) as a dovetail or Keyhole locking or by a lower tab (33) which is punched out perpendicularly to the strip material and which is pressed into a through hole (23) of a sheet metal extending above it.

17. Electrical contact (10) according to one of the preceding claims, characterized in that a contour of the hollow-shaped box (18) without a protrusion is achieved by offsetting a side wall (37) in the locking (36).

18. Electrical contact (10) according to one of the preceding claims, characterized in that the threaded piece (26) engages in recesses (28) in a lateral wall of the hollow-shaped box (18) and thereby locks.

19. Electrical contact (10) according to one of the preceding claims, characterized in that a stable contact in the direction of a screw (38) to be screwed into the thread (22) is achieved by the locks (26, 36, 46).

20. Electrical contact (10) according to one of the preceding claims, characterized in that the screw clamping point (14) has at least one first cover (20) or at least one tab (32, 33) with a through hole (23) and a threaded piece (26, 35) with the thread (22).

21. Electrical contact (10) according to claim 20, characterized in that the screw clamping point (14) has at least two tabs (32, 33), the through hole (23) for the thread (22) through the at least two overlapping tabs ( 32, 33) is passed through.

22. Electrical contact (10) according to one of the preceding claims, characterized in that for miniaturization an area with the thread (22) is selected from a thicker side of the step band and a thin side of the material for side walls and at least one cover (20, 32,

33) of the hollow-shaped box (18) is selected.

23. Electrical contact (10) according to one of the preceding claims, characterized in that a wire protection (56) is connected to a first cover (20) or a tab (32, 33).

24. Electrical contact (10) according to claim 26, characterized in that the wire protection (56) is bent into the hollow-shaped box (18).

25. Electrical contact (10) according to one of claims 26 or 27, characterized in that the wire protector (56) has a bent end (57).

26. Electrical contact (10) according to one of the preceding claims, characterized in that clamping lugs (47, 48, 49) are bent into the plug-in clamping element (40) for a conductor from one or more sides and into the clamping lugs (47, 48 , 49) a conductor is inserted in the mating direction.

27. Electrical contact (10) according to one of the preceding claims, characterized in that the clamping lugs (47, 48, 49) act in a self-locking manner counter to the insertion direction and prevent the conductor from being pulled out, the clamping lugs (47, 48, 49) making contact to make the conductor.

28. Electrical contact (10) according to one of the preceding claims, characterized in that the clamping lugs (47, 48, 49) are released from the conductor by means of a release tool introduced into the hollow-shaped box (18) of the electrical contact (10) after the conductor has been assembled are solvable.

29. Electrical contact (10) according to one of the preceding claims, characterized in that the clamping tabs are connected as first tabs (47) at the front of the cover (44) and / or the clamping tabs as second tabs (48) at the rear of the cover (44) are connected and can be bent into the hollow-shaped box (18).

30. Electrical contact (10) according to one of the preceding claims, characterized in that the clamping tabs as third tabs (49) from the wall fertilize the hollow box (18) or the third cover (44) are punched out and are bent into the hollow box (18).

31. Electrical contact (10) according to one of the preceding claims, characterized in that the clamping lugs (47, 48, 49) are designed as arched clamping lugs (62).

32. Electrical contact (10) according to one of the preceding claims, characterized in that the clamping lugs (47, 48, 49) have a circular cutout (64) at the end of the inserted conductor.

33. Electrical contact (10) according to one of the preceding claims, characterized in that a raised contact point (66) on the hollow box (18) in U-shape or on the third cover (44) is formed in an area of one-sided clamping (50) is.

34. Electrical contact (10) according to claim 33, characterized in that the raised contact point (66) is introduced into the material of the hollow box (18) or the third cover (44) by punching or stamping.

35. Electrical contact (10) according to one of the preceding claims, characterized in that the electrical contact (10) is made connected to a carrier strip (60) with a connecting web (58).

36. Electrical contact (10) according to claim 35, characterized in that the electrical contact (10) with the connection to the carrier strip (60) is selectively galvanized.

37. Electrical contact (10) according to one of the preceding claims, characterized in that the electrical contact (10) is manufactured as an individual part.

38. Electrical contact (10) according to one of the preceding claims, characterized in that a RoHS-compliant material is used during punching to produce the electrical contact (10).

39. Electrical contact (10) according to one of the preceding claims, characterized in that a rolled, shaped or cut-in thread (70) is formed in a hole in the cover (71), the wall or the bottom of the hollow box (13) .

40. Electrical contact (10) according to claim 39, characterized in that the thread (70) is placed inwards or outwards to the hollow-shaped box (13).

41. Electrical contact (10) according to one of claims 39 or 40, characterized in that the thread (70) is introduced in an inwardly shaped collar (72) or in an outwardly shaped collar (80), whereby the thread depth is extended.

42. Electrical contact (10) according to one of the preceding claims, characterized in that cutouts are formed in the side walls, which both enlarge the available space and also serve for locking and enable mechanical bending of the material.

43. Electrical contact (10) according to one of the preceding claims 39 to 42, characterized in that a free cut is formed in a bending area next to the thread (70), whereby a distortion of the thread (70) when bending is prevented.

44. Electrical contact (10) according to one of the preceding claims 39 to 42, characterized in that the upper edge of the inwardly or outwardly shaped threaded sleeve is the same height as the cover 20 or under the cover 20, so that it can be inserted into a Plastic body is possible without resistance.