EP2678904A2

EP2678904A2 - Metal part for an electric connecting device

Info

Publication number: EP2678904A2
Application number: EP12712058.2A
Authority: EP
Inventors: Bernd Wilinski
Original assignee: Phoenix Contact GmbH and Co KG
Current assignee: Phoenix Contact GmbH and Co KG
Priority date: 2011-02-22
Filing date: 2012-02-22
Publication date: 2014-01-01
Anticipated expiration: 2032-02-22
Also published as: ES2727036T3; DE102011012021A1; JP6033237B2; CN103392271B; US20130330985A1; US9184540B2; WO2012113544A2; JP2014509443A; WO2012113544A3; EP2678904B1; CN103392271A

Abstract

The invention relates to a metal part for an electric connecting device for connecting at least one stripped conductor end, comprising a base limb (2), a contact limb (3) that is substantially perpendicular relative to said base limb, and at least one lateral wall (4). The contact limb (3) together with a clamping limb (6) of a clamping spring (5) forms a spring clamp terminal for an electric conductor to be connected. The metal part according to the invention requires only a small amount of material in that the contact limb (3) is bent away from the base limb (2), and the lateral wall (4) is bent away from the contact limb (6), wherein the bending edge (8) between the contact limb (3) and the base limb (2) runs perpendicular relative to the longitudinal extension of the contact limb (3) and the base limb (2), while the bending edge (9) between the contact limb (3) and the lateral wall (4) runs parallel relative to the longitudinal extension of the contact limb (3).

Description

Metal part for an electrical connection device

The invention relates to a metal part for an electrical connection device for connecting a stripped conductor end, with a base leg, a substantially perpendicular thereto arranged contact legs and at least one side wall, wherein the contact legs together with a clamping leg of a clamping spring forms a Federkraftklemmanschluss for an electrical conductor to be connected. In addition, the invention also relates to a method for producing such a metal part, as well as a connection device and an electrical terminal for connecting a stripped conductor end, with acting as a compression spring on the conductor end, a clamping leg and a plant leg having clamping spring and a metal part.

Electrical terminals are known in a variety of embodiments. The terminals can be designed to connect an electrical conductor to a circuit board as a so-called print terminal or for connection to another conductor as a terminal block. As clamping springs both loop-shaped clamping springs, so-called spring-loaded terminals, as well as U-shaped or V-shaped clamping springs are used in the rigid conductor or provided with a wire end ferrule conductors directly, d. H. without the need to open the nip previously with a tool, can be plugged. In the known loop-shaped tension springs - according to their name - the conductor to be connected pulled by the clamping leg against a busbar. In contrast, in the case of U-shaped or V-shaped clamping springs, the conductor to be connected is pressed by the clamping leg of the compression spring acting as a compression spring against the busbar or a portion of the metal part.

Electrical connection terminals with a compression spring acting as a compression spring, in addition to a housing usually made of plastic at least one arranged and held in the interior of the housing connecting device, which consists of a clamping spring and a metal part. The U-shaped or V-shaped clamping spring has a clamping leg and a plant leg, wherein the clamping leg together with

CONFIRMATION COPY a region of the metal part forms a spring terminal connection for the connected, inserted into the electrical terminal stripped electrical conductor.

The metal part is initially used to transfer a current between the contact point with the electrical conductor and a second contact point, which may be, for example, a contact point to a circuit board or a contact point to a second conductor. In the second case, the metal part thus serves to transmit a current from a first electrical conductor, which is connected to a first spring terminal connection, to a second conductor connected to a second spring terminal connection. In addition, however, the metal part is usually also used to hold the clamping spring and in particular for lateral guidance of the inserted conductor, to which the metal part in addition to the base leg and the contact leg at least one substantially perpendicular thereto side wall having a lateral pushing out of the stripped conductor end prevents the area of the nip.

An electrical terminal with a metal part described above is known for example from DE 10 2008 039 232 AI. The metal part consists of a relatively large-scale side wall, from which a contact leg, a base leg and a plant leg are bent on three different sides of the side wall. The contact leg forms together with the clamping leg of the clamping spring the Federkraftklemmanschluss for an electrical conductor to be connected. The plant leg of the clamping spring abuts against the contact leg opposite the plant leg of the metal part, whereby the clamping spring is held by the metal part. An additional holding and fixing of the clamping spring takes place by means of a pin formed in the housing. About the perpendicular to the contact leg base leg, the transmission of the current from the conductor introduced in the contact point takes place to a second contact point.

From DE 20 2005 005 369 Ul an electrical terminal is also known, which has at least one connecting device, which consists of a clamping spring and a metal part. The metal part is here designed as a channel-like, U-shaped trough with a base leg and two longitudinal limbs, wherein one end of a longitudinal leg is bent so that ^' the end is perpendicular to the two longitudinal legs and the base leg. This so bent end forms the contact leg, which forms the Federkraftklemmanschluss for the electrical conductor to be connected together with the clamping leg of the clamping spring.

A similar metal part is also known from DE 20 2007 012 429 Ul. Here too, the metal part has a base leg and two longitudinal limbs bent perpendicularly to it, the contact leg also being formed by the angled end of a longitudinal limb. In addition, a reinforced bottom portion is still provided in this metal part by a folded portion of one of the two longitudinal legs and arranged opposite to the underside of the base leg.

The common metal parts have in common that they are punched out of a flat metal strip and then spent by bending individual sections in their finished form. The disadvantage here is that they require an increased use of materials, which is not determined solely by the required current carrying capacity.

The present invention is therefore an object of the invention to provide a metal part described above for an electrical connection device available, which requires the lowest possible material use with good functionality.

This object is achieved in the metal part described above according to the invention that the contact leg is bent from the base leg and the side wall of the contact leg, wherein the bending edge between the contact leg and the base leg perpendicular to the longitudinal extent of the contact leg and the base leg, while the bending edge between the contact leg and the side wall extending parallel to the longitudinal extent of the contact leg and the side wall. In contrast to the known from the prior art metal parts of the metal part of the invention, the contact leg is not bent from a side wall, wherein the side wall itself is bent from the base leg, but bent directly from the base leg. In addition, the side wall is not bent from the base leg but from the contact leg. According to the invention it has been recognized that the material used for the production of the metal part can be significantly reduced by the fact that the legs determining the overall height of the finished metal part are arranged such that the bending edges, by which they are bent, run parallel to the transport direction.

In the case of the metal parts for an electrical connection device of a connection terminal, the leg of the contact limb determining the overall height of the metal part is. While in the metal parts according to the prior art in the initial state, d. H. Before the bending, the longitudinal extension of the contact leg parallel to the transport direction during punching and bending of the metal part, extending in the metal part according to the invention not only the base leg but also the contact leg perpendicular to the transport direction. Although this increases somewhat the dimension (length) of the metal strip perpendicular to the transport direction, at the same time, however, the dimension (width) of the metal strip in the transport direction can be significantly reduced, resulting in a significant reduction of the material used per metal part.

The side wall bent laterally from the contact limb serves as a boundary for the conductor end to be connected, so that the conductor end is not pressed laterally out of the contact point by the clamping limb of the clamping spring. Without the formation of a side wall, this danger would be particularly in flexible, a plurality of individual strands having conductors from which at least individual strands could be pushed past the contact legs. Preferably, the side wall has a longitudinal extent which is slightly less than the longitudinal extent of the contact leg, wherein the side wall is so connected to the contact leg, that the upper, remote from the base leg end of the contact leg and the upper end of the side wall at about the same height lie. According to a preferred embodiment, a second side wall is provided, which is bent from the base leg, wherein the second side wall is arranged on the same side of the metal part as the first Seiteriwand. The bending edge between the second side wall and the base leg extends parallel to the longitudinal extension of the second side wall and to the longitudinal extent of the base leg. By a corresponding dimensioning and design of the first side wall and the second side wall can thereby be generated a contiguous side surface, which together forms a boundary for the connected conductor end. Preferably, the mutually facing end portions of the two side walls are formed so that the two side walls are positively connected to each other in the finished state of the metal part. As a result of the anchoring of the two side walls with each other, a stabilization of the contact limb bent from the base leg is advantageously achieved so that there is no risk of the contact limb being forced out of its predetermined position by the force of the clamping spring.

According to a further advantageous embodiment, the end of the second side wall facing away from the first side wall is bent away from the second side wall in such a way that the end lies opposite the contact leg. The bending edge between the second side wall and the end extends perpendicular to the longitudinal extent of the second side wall. Preferably, the bent end has a length which corresponds approximately to the width of the contact leg and the base leg.

In the above-described preferred embodiment of the metal part according to the invention with two side walls, which together form a closed side surface, not only a lateral pushing out of a connected conductor end is reliably prevented and a high stability of the contact leg achieved, but by the bent end of the second side wall is beyond also provided a contact surface for the plant leg of the clamping spring, so that the metal part also serves for fastening or holding the clamping spring.

The metal part according to the invention can be produced simply as a stamped and bent part from a metal strip, which as a rule consists of a larger metal part. tallstück a plurality of metal parts are punched out and bent. Until the completion of the individual metal parts they are usually connected to each other via transport pieces that support a transport of the metal strip or the metal piece in the transport direction, so that the individual metal parts can be punched and bent freely in several successive steps, while the metal piece is moved in the transport direction.

A preferred method for producing a metal part according to the invention from a flat metal strip is characterized in that initially in a first step, the contour of the metal part is punched free. In a second step, the first side wall is then bent around a bending edge between the side wall and the contact leg, wherein the bending edge is parallel to the longitudinal extent of the contact leg and perpendicular to the transport direction of the metal strip. In a further step, the contact leg is bent around a bending edge between the contact leg and the base leg, wherein the bending edge is perpendicular to the longitudinal extension of the contact leg and the base leg and parallel to the transport direction of the metal strip.

In the method according to the invention for producing a metal part from a flat metal strip, the longitudinal extent of the metal strip required for a metal part is determined essentially by the length of the base leg and the length of the adjoining contact leg, while the width of the metal strip is substantially determined by the width of the contact leg and the first side wall or the - usually the same - width of the base leg and the second side wall is determined. The transport direction in the production of the metal part is perpendicular to the aforementioned longitudinal extension of the metal strip.

According to a preferred embodiment of the method according to the invention in a further step on the side of the metal strip on which the first side wall is arranged, a second side wall bent around a bending edge between the second side wall and the base leg, wherein the bending edge parallel to the longitudinal extent of second side wall and perpendicular to the transport direction of the metal strip. Depending on the specific embodiment of the contour of the mutually facing end regions of the two side walls, the bending of the second side wall may take place before or after the first side wall or the contact leg is bent over. It is advantageous, however, usually when first the contact leg with the already bent first side wall and only then the second side wall is bent, since a simpler positive connection of the two side walls can be achieved with each other.

According to a further preferred embodiment of the method according to the invention, the first side wall facing away from the end of the second side wall is bent by the second side wall until the end of the second side wall is opposite to the contact leg. The bending edge between the second side wall and the end, around which the end of the second side wall is bent, extends perpendicular to the longitudinal extent of the second side wall and parallel to the transport direction of the metal strip. Preferably, the end of the second side wall is bent before the second side wall itself is bent over.

In addition to the metal part according to the invention and the method for producing the metal part, the invention also relates to a connection device for connecting a stripped conductor end and an electrical terminal. The connecting device consists of the metal part according to the invention and acting as a compression spring on the conductor end clamping spring, which has a clamping leg and a plant leg, wherein the contact legs of the metal part together with the clamping leg of the clamping spring form a spring terminal connection for an electrical conductor to be connected.

In addition to the connection device, the electrical connection terminal also has a housing in which the connection device, ie the metal part and the clamping spring, are arranged. In addition, at least one conductor insertion opening for insertion of a conductor to be connected and at least one actuation opening are formed in the housing. The actuating opening serves to guide an actuating tool so as to press against the clamping leg of the clamping spring so that the clamping point is open. net and a connected conductor can be pulled out of the terminal again. As an operating tool can be used, for example, the tip of a screwdriver.

According to a preferred embodiment of the electrical connection terminal, the opening of the nip is not carried out with the aid of a separate actuating tool but with the aid of an actuating pusher displaceably arranged in the housing. The actuating pushbutton is arranged in the Betätigungsöffhung such that it is displaceable from a first position in which the Federkraftklemmanschluss is closed, in a second position in which the actuating handle deflects with its clamping leg facing the end of the clamping leg against the spring force of the clamping spring, so that the spring force terminal connection is opened. In the housing while a paragraph and the actuating handle at least one projection is formed, wherein the actuating handle can be moved into a position in which the projection and the paragraph are locked together so that the actuating handle is held in its second position.

If the actuating push-button is in its second position, so that the spring-force clamping connection is open, not only can a connected conductor be pulled out of the electrical connection terminal, but also a flexible conductor can be inserted into the connection terminal. With regard to further possible embodiments of the actuating handle, reference is made to DE 10 2008 039 232 A1.

According to a last advantageous embodiment of the electrical connection terminal, which will be briefly explained here, the electrical connection terminal has not only one connection device but at least two connection devices. The electrical connection terminal thus serves to connect at least two stripped conductor ends. For this purpose, two clamping springs and functionally at least two metal parts are provided in the housing of the terminal, wherein the metal parts are made of a single flat metal strip. If the connection terminal has two connection devices, the two base legs of the two metal parts are integrally connected to one another. The base legs thus form the middle area of the metal strip, while the two contact points Legs are arranged at the two opposite ends of the metal strip.

In particular, there are a variety of ways to design and develop the metal part of the invention or the connection device or the electrical terminal. Reference is made to both the individual claims and to the following description of preferred embodiments in conjunction with the drawings. In the drawing show

1 shows an embodiment of an electrical terminal, in longitudinal section,

2 is a perspective view of a metal part according to the invention,

Fig. 3 is a punched metal strip, from which the metal part according to

Fig. 2 is bent,

4 is an illustration of a metal part for connecting two stripped conductor ends, from the side and from above,

5 shows the individual method steps for producing the metal part according to FIG. 4, FIG.

6 shows a metal piece with a plurality of metal strips in the different method steps according to FIG. 5, according to the invention, and FIG

7 shows a metal piece with a plurality of metal strips in the different method steps for producing a metal part according to the prior art.

The figures show an inventive metal part 1 or individual process steps for its production. The metal part 1 has at least one base leg 2 and at least one contact leg 3 and at least one first side wall 4. The metal part 1, together with a - only in Fig. 1 shown - clamping spring 5 is an electrical connection device for connecting at least one stripped conductor end, wherein the contact leg 3 of the metal part 1 together with the clamping leg 6 of the clamping spring 5 forms a Federkraftklemmanschluss for the conductor to be connected. The acting as a compression spring on the conductor end clamping spring 5 has in addition to the clamping leg 6 on a plant leg 7, so that the clamping spring 5 is formed approximately V-shaped overall.

The metal part 1 shown in FIG. 2 forms, together with a clamping spring 5, a connection device for a stripped conductor, for which purpose the conductor end is pressed by the clamping leg 6 against the contact leg 3. The power transmission from the connected electrical conductor to a second contact point, which may be, for example, a contact point to a printed circuit board, then takes place via the metal part 1. In addition, however, the second contact point may also be the clamping point for connecting a second conductor in a second connection device. Such a connecting device is then used for connection and electrical connection of two stripped conductor ends, wherein the connecting devices then two clamping springs 5 and functionally two metal parts 1, Γ, wherein the two metal parts 1, Γ, however, are integrally connected to each other, as shown in FIGS to 6 is shown.

In Fig. 2, however, a metal part 1 is shown, to which by means of a contact spring 5 only a stripped conductor can be connected. As the base leg 2 continues to run on the side facing away from the contact leg 3, d. H. Whether the base leg 2 is connected to the base leg of a second metal part Γ according to FIG. 4 or, for example, to a connection pin for a printed circuit board is irrelevant for the design of the metal part 1.

From a comparison of FIGS. 2 and 3 and the method steps shown in FIGS. 5 and 6 for the production of the metal part 1, it can be seen that the contact leg 3 is connected directly to the base leg 2 via a bending edge 8, wherein the bending edge 8 between the contact leg 3 and the base leg 2 extends perpendicular to the longitudinal extension of the contact leg 3 and the base leg 2. The contact leg 3 thus directly adjoins the one end of the base leg 2, so that the base leg 2 and the contact leg 3 extend in the same direction before bending. In contrast to this, the first side wall 4 is not bent away from the base leg 2 but from the contact leg 3, the bending edge 9 extending parallel to the longitudinal extent of the contact leg 3 between the contact leg 3 and the side wall 4.

In addition to the first side wall 4 connected to the contact leg 3 via the bending edge 9, the metal part 1 also has a second side wall 10 which is bent away from the base leg 2. The bending edge 1 1 between the base leg 2 and the second side wall 10 as well as the bending edge 9 parallel to the longitudinal extent of the base leg 2 and the contact leg 3, wherein the two side walls 4, 10 on the same side of the metal part 1, d. H. are arranged on the same side of the base leg 2 and the contact leg 3.

The side wall 4, which is bent laterally from the contact limb 3, serves as a boundary for the conductor end to be connected, so that the conductor end is not pressed laterally out of the contact point by the clamping leg 6 of the clamping spring 5 or is pushed past the contact leg 3. This danger would exist without the side wall 4 in particular in a flexible conductor, which consists of a plurality of individual strands, so that individual strands of the clamping leg 6 could be pressed laterally past the contact leg 3. The second side wall 10 serves on the one hand as an additional limitation for the conductor end to be connected, but on the other hand also for stabilizing the contact leg 3, for which the two mutually facing end portions 12, 13 of the two side walls 4, 10 in the finished state of the metal part 1 positively connected to each other are. For this purpose, the end portions 12, 13 of the two side walls 4, 10 each have a mutually corresponding contour, in particular in each case an edge 14, 15 is provided which in the finished state of the metal part 1 an acute angle α between 45 ° and 90 ° to the base leg 2 has. As a result, an unintentional bending of the contact leg 3 is reliably prevented by the spring force of the clamping spring 5, since the two side walls 4, 10 are securely hooked together by their correspondingly formed end portions 12, 13. To support the abutment leg 7 of the clamping spring 5, the first side wall 4 facing away from the end 16 of the second side wall 10 is bent from the second side wall 10 such that the end 16 of the contact leg 3 is opposite. The bending edge 17 between the second side wall 10 and the end 16 extends perpendicular to the longitudinal extent of the second side wall 10.

In order to further reduce the use of material in the production of the metal part 1 according to the invention, a recess 18 is provided on the longitudinal side of the contact leg 3 facing away from the first side wall 4 and a projection 19 on the longitudinal side of the first side wall 4 facing away from the contact leg 3, wherein the contour the indentation 18 and the contour of the projection 19 are adapted to each other. As a result, in the production of a plurality of metal parts 1, the distance between the individual metal parts 1 can be further reduced.

The inventive method for producing a metal part 1 will be explained in more detail with reference to FIG. 5, wherein in FIG. 5, five method steps are shown in succession.

Starting point for the production of a metal part 1 is a flat metal strip 20, wherein in the industrial production usually the individual metal parts 1 not from individual, narrow metal strip 20 but from a larger metal portion with a plurality of metal strip 20, as shown in FIG. 6 is recognizable, freely punched and bent. After free punching of the metal part 1, as shown in Fig. 5b, the first side wall 4 are bent around the bending edge 9 and the end 16 of the second side wall 10 to the bending edge 17 (see Fig. 5c), wherein the bend in usually done by 90 °. In the next method step, according to FIG. 5d, the contact leg 3 is then bent around the bending edge 8, so that the contact leg 3-and with it also the first side wall 4-extends perpendicular to the longitudinal extension of the base leg 2. Finally, the second side wall 10 is bent around the bending edge 1 1, wherein due to the adapted contour of the end portions 12, 13 of the two side walls 4, 10, the two side walls 4, 10 are then positively connected with each other, so that a bending of the contact leg 3 - in the representation according to the figures to the outside - is reliably prevented by the clamping spring 5.

Although a metal part 1 for connecting two stripped conductor ends is shown in FIG. 5, it is not recognizable to the person skilled in the art that a metal part 1 for connecting only one conductor according to FIGS. 2 and 3 can easily be made from a corresponding metal strip 20 but also a metal part for connecting more than two conductors can be produced, wherein the method steps described above can continue to be carried out in principle.

The significantly lower material input required in the production of the metal part 1 according to the invention is also apparent from a comparison of FIGS. 6 and 7, FIG. 6 showing the production of a plurality of metal parts 1 according to the invention from a metal piece 20, while FIG shows the production of known from the prior art metal parts 101 of a piece of metal.

Although a metal strip 20 for a metal part 1 according to the invention has, compared to a metal strip 120 for producing a metal part 101 known from the prior art, a somewhat greater length L, but a significantly smaller width B, the surface of the metal strip 20 only is about 65% of the area of the metal strip 120 without the current carrying capacity of the metal part 1 relative to the metal part 101 is reduced. This significant material savings results in particular from the fact that in the case of the metal part 1 according to the invention the contact leg 3 is bent directly from the base leg 2, while in the metal part 101 from the prior art the contact leg 103 is bent away from the side wall 104. In the case of the metal part 101 according to the prior art, the contact leg 103 determining the overall height of the metal part 101 is aligned parallel to the transport direction T of the metal strip 120, whereas in the metal part 1 according to the invention the contact leg 3 is perpendicular to the transport direction T. In the case of the metal part 1 according to the invention, the longitudinal extent of both the base leg 2 and of the contact leg 3 and the longitudinal extent of the two side walls 4, 10 are oriented perpendicular to the transport direction T, whereby the waste surface of the metal strip 20, which is not used for the metal part 1, significantly reduced.

If not only a single metal strip 20 punched out and bent, but - as shown in Fig. 6 - a plurality of metal parts 1 are made of a larger piece of metal, so the individual metal parts 1 are still connected to each other even after the free punching their contour yet via corresponding transport pieces 21 , which serve to transport the metal strip 20 in the transport direction T.

The electrical connection terminal 22, which is shown overall only in FIG. 1, has a housing 23 in which, in addition to the metal part 1 previously described in detail, a clamping spring 5 is also arranged. In addition, a conductor insertion opening 24 for the insertion of the conductor to be connected and an actuating opening 25 are formed in the housing 23. In this case, an actuating printer 26 is slidably disposed within the actuating opening 25, wherein the actuating printer 26 is displaceable from a first, in Fig. 1, position shown in a second, depressed position. In the first position, the clamping leg 6 facing the end 27 of the actuating push button 26 does not press against the clamping leg 6, so that the Federkraftklemmanschluss is closed. In the second, depressed position of the actuating pushbutton 26, by contrast, the clamping leg 6 is deflected by the actuating pushbutton 26 so far against the spring force of the clamping spring 5 that the spring force clamping connection is open and a connected conductor can be pulled out of the clamping point.

Thus, the actuating handle 26 can lock in the second position, a shoulder 28 and the actuating lever 26, a projection 29 are formed in the housing 23, wherein the projection 29 in the second position of the actuating lever 26 by the spring force of the clamping spring 5 against the shoulder 28 in the housing 23 is pressed. In order to unlock the actuating push-button 26 again from the second position, the tip of a screwdriver can be inserted into a depression formed in the head of the actuating push-button 26 and then the screwdriver can be displaced perpendicular to the longitudinal extension of the actuating push-button 26. As a result, as the locking between the projection 29 and the shoulder 28 solved.

Claims

claims:

1. metal part for an electrical connection device for connecting at least one stripped conductor end, with a base leg (2), a substantially perpendicular thereto arranged contact leg (3) and at least one side wall (4), wherein the contact leg (3) together with a clamping leg (6) a clamping spring (5) forms a spring-force clamping connection for an electrical conductor to be connected,

characterized,

the contact leg (3) is bent away from the base leg (2) and the side wall (4) from the contact leg (3), wherein the bending edge (8) between the contact leg (3) and the base leg (2) perpendicular to the longitudinal extent of the Contact leg (3) and the base leg (2) extends, while the bending edge (9) between the contact leg (3) and the side wall (4) parallel to the longitudinal extent of the contact leg (3).

2. Metal part according to claim 1, characterized in that a second side wall (10) is provided, which is bent from the base leg (2), wherein the bending edge (1 1) between the second side wall (10) and the base leg (2) in parallel extends to the longitudinal extent of the second side wall (10) and the base leg (2) and wherein the two side walls (4, 10) on the same side of the metal part (1) are arranged.

3. Metal part according to claim 2, characterized in that the mutually facing end regions (12, 13) of the two side walls (4, 10) are formed so that the two side walls (4, 10) in the finished state of the metal part (1) positively connected to each other.

4. Metal part according to claim 3, characterized in that the mutually facing end regions (12, 13) of the two side walls (4, 10) each have an edge (14, 15) which extends at an acute angle α to the base leg (2) ,

5. Metal part according to one of claims 2 to 4, characterized in that the first side wall (4) facing away from the end (16) of the second side wall (10) of the second side wall (10) is bent, wherein the bending edge (17) between the second side wall (10) and the end (16) perpendicular to the longitudinal extent of the second side wall (10), so that the end (16) opposite the contact leg (3).

6. Metal part according to one of claims 1 to 5, characterized in that on the first side wall (4) facing away from the longitudinal side of the contact leg (3) has a recess (18) and on the contact leg (3) facing away from the longitudinal side of the first side wall (4). a projection (19) is provided, wherein the contour of the recess (18) and the contour of the projection (19) are adapted to each other.

7. A method for producing a metal part (1) for an electrical connection device from a flat metal strip (20), wherein the metal part (1) has a base leg (2), a contact leg (3) and at least one side wall (4), characterized by following steps:

Free punching the contour of the metal part (1),

Bending a first side wall (4) about a bending edge (9) between the side wall (4) and the contact leg (3), wherein the bending edge (9) parallel to the longitudinal extent of the contact leg (3) and perpendicular to the transport direction (T) of the metal strip ( 20),

Bending the contact leg (3) about a bending edge (8) which is perpendicular to the longitudinal extension of the contact leg (3) and the base leg (2) and parallel to the transport direction (T) of the metal strip (20).

8. A method for producing a metal part (1) according to claim 7, characterized in that in a further step on the side of the metal strip (20) on which also the first side wall (4) is arranged, a second side wall (10) to a bending edge (1 1) between the second side wall (10) and the base leg (3) is bent, wherein the bending edge (1 1) parallel to the longitudinal extent of the second side wall (10) and perpendicular to the transport direction (T) of the metal strip (20).

9. A method for producing a metal part (1) according to claim 8, characterized in that before the bending of the second side wall (10) facing away from the first side wall (4) end (16) of the second side wall (10) of the second side wall ( 10) about a bending edge (17) is bent until the end (16) opposite the contact leg (3), wherein the bending edge (17) between the second side wall (10) and the end (16) perpendicular to the longitudinal extent of the second side wall ( 10) and parallel to the transport direction (T) of the metal strip (20).

10. Connecting device for connecting a stripped conductor end, with a force acting as a compression spring on the conductor end clamping spring (5) having a clamping leg (6) and a plant leg (7), and with a metal part (1) according to one of claims 1 to 6 , wherein the contact leg (3) of the metal part (1) together with the clamping leg (6) of the clamping spring (5) forms a spring terminal connection for an electrical conductor to be connected.

1 1. Electrical terminal with a housing (23), with at least one acting as a compression spring on the conductor end clamping spring (5) having a clamping leg (6) and a plant leg (7), and at least one metal part (1) after a of claims 1 to 6, wherein the contact leg (3) of a metal part (1) together with the clamping leg (6) of a clamping spring (5) forms a Federkraftklemmanschluss for an electrical conductor to be connected and wherein in the housing (23) at least one conductor insertion opening (24 ) are formed for insertion of a conductor to be connected and at least one actuating opening (25).

12. Electrical terminal according to claim 1 1, characterized in that in the actuating opening (25) an actuating push-button (26) is arranged such that it is displaceable from a first position in which the spring force terminal connection is closed, in a second position, in the actuating push-button (26) with its clamping leg (6) zuge- turned first end (27) the clamping leg (6) against the spring force of the clamping spring (5) deflects, so that spring terminal connection is opened, wherein in the housing (23) has a shoulder (28) and the actuating handle (26) at least one projection (29) are formed and the actuating handle (26) can be brought into a position in which the projection (29) and the shoulder (28) are locked together so that the actuating handle (26) is held in its second position.

13. Electrical terminal according to claim 1 1 or 12, for connecting two stripped conductor ends, characterized in that functionally two metal parts (1, Γ) are provided, of which two base legs (2) are integrally connected to each other, wherein the two metal parts (1, ) are made of a flat metal strip (20).