EP3134942A1

EP3134942A1 - Conductor connection clamp

Info

Publication number: EP3134942A1
Application number: EP15720648.3A
Authority: EP
Inventors: Henry Ziesemann
Original assignee: Wago Verwaltungs GmbH
Current assignee: Wago Verwaltungs GmbH
Priority date: 2014-04-23
Filing date: 2015-04-23
Publication date: 2017-03-01
Anticipated expiration: 2035-04-23
Also published as: CN106256046B; KR20160146832A; CN106256046A; EP3134942B1; DE202014101915U1; JP2017514282A; WO2015162210A1

Abstract

The invention relates to a conductor connection clamp (1) comprising at least one conductor clamp element (3) which is formed integrally from one sheet metal section and has a base section (10), a spring bow (11) connected to said base section (10), and a clamping limb (12) that is connected to said spring bow (11) and lies opposite the base section (10). The free clamping end (13) of the clamping limb (12) forms a clamping edge for clamping to an electrical conductor (4). An end section (14) of the base section (10), lying opposite said spring bow (11), extends towards the clamping limb (12) from the plane spanned by the base section (10) and forms an overload stop for said clamping limb (12).

Description

Conductor terminal

The invention relates to a conductor terminal with at least one conductor clamping element, which is formed integrally from a sheet metal part and has a base portion, an adjoining the base portion spring bow and a subsequent to the spring bow and the base portion opposite clamping leg, wherein the free terminal end of the clamping leg forms a clamping edge for clamping an electrical conductor.

Such conductor connection terminals serve for clamping an electrical conductor and producing an electrically conductive connection between the electrical conductor and a device which is directly or indirectly electrically conductively connected to the connection contact. The conductor terminal may e.g. be soldered with their connection contacts on a circuit board.

EP 1 947 738 A1 shows a conductor connection terminal and a leaf spring contact for this purpose, which is installed in an insulating material housing. The Isolierstoffgehause has a protruding from the back in the conductor insertion opening of the insulating housing overload protection bar, which is part of the insulating material.

EP 0 682 385 B1 discloses an electrical connector with an insulating housing and a conductor clamping element built into the insulating housing, which is formed integrally from a sheet metal part. On one side of the base section is bent over a spring bow a Klennnnschenkel, which extends obliquely away from the base portion. On the side opposite the spring bow side of the base portion, a terminal contact is downwardly opposite to the direction of extension of the clamping leg downgebogen gene, so that the terminal contact protrudes from the insulating housing in the installed state.

Furthermore, a material flap is exposed from the base portion and bent out in the direction of the clamping leg. This material flap forms an overload stop for the clamping leg, so that the clamping leg abuts the overload stop when moving in the direction of the base section. In this way, excessive compression of the spring bow, including the spring properties, is avoided. The overload stop also serves as a stop for a mounting tool, so that the conductor clamping element can be guided into the interior of the insulating housing and wedged there.

Based on this, it is an object of the present invention to provide an improved conductor terminal, which is particularly compact and material-saving and independent of the insulating material provides overload protection.

The object is achieved by the conductor terminal with the features of claim 1. Advantageous embodiments are described in the subclaims.

In the case of the conductor connection terminal, the end section of the base section opposite the spring bow extends from the plane spanned by the base section in the direction of the clamping leg and forms an overload stop for the clamping leg. The overload stop is thus formed of a material flap, which is the base portion opposite to Extended spring bow and bent out of the plane of the base section. This bent out of the plane of the base portion free end portion of the sheet metal part is bent in Klennnnschenkel direction and has a length adapted in such a way that excessive displacement of the clamping jaw is prevented in the direction of the base portion. For this purpose, this end portion forms a stop for the clamping leg. It is essential that the conductor clamping element is integrally formed from a sheet metal part. By "integral" is meant that the base portion, the spring bow and the clamping leg as well as the from the end portion, which is opposite to the spring bow formed, overload stop without joining (free of joints) are formed from one part.

It is advantageous if at least one connection contact is present, which has been exposed from the base section (for example cut or punched free) and bent outwards. The conductor clamping element can be made very compact and material-saving in this way. The overload stop is executable with sufficient length and can be aligned with the free terminal end. By virtue of this arrangement, the current guidance is furthermore optimized and kept as short as possible, since the free end section opposite the spring bow, which adjoins the base section, is now used for the overload stop and not for the connection contact. It is particularly advantageous if the connection contact is exposed from the base section and bent out of the plane of the base section in a direction opposite to the clamping leg. This leaves a slot in the base section. The slot-limiting side webs are no longer required for current conduction, so that the current-carrying cross-section and thus the current transfer resistance is not impaired by the bending out of a material lobe from the base section. It is particularly advantageous if the connection contact is bent out of the base section in a region adjacent to the transition of the base section to the spring arch. Then the current paths from the free terminal end to the terminal contact are kept as short as possible.

Furthermore, it is advantageous if the free end of the overload stop forming end portion is bent in the direction of the free end of the clamping leg. As a result of this further bend, which is oriented in the direction of the spring bow and the clamping legs adjoining it, it is achieved that the overload stop does not act rigidly on the clamping leg but is slightly elastically yielding. This reduces the stress on the clamping leg. It is particularly advantageous if the free end of the end stop forming the overload stop is tapered. This ensures that the overload stop forming free end portion is sufficiently stable due to its initially greater width. With the help of the taper, the abutment surface for the clamping leg is adapted to the width of the free terminal end and, if appropriate, further reduced. Furthermore, the assembly of the conductor clamping element is simplified in the insulating material by the taper.

The free clamping end of the clamping leg is bent in a preferred embodiment of the plane defined by the clamping leg plane in a direction away from the base portion. Thus, the free terminal end is steeper compared to the adjoining region of the clamping leg steeper to the conductor axis of an inserted into a conductor insertion opening and placed above the conductor clamping element electrical conductor out. This ensures that the free terminal end contacts the electrical conductor with the sharpest possible edge, in this way reducing the area between the clamping leg and the electrical conductor, and the Increase surface pressure. The spring contact force of Leiterklemmelennentes is concentrated in this way on the smallest possible contact area and increases the surface pressure thus. This improves the current transfer values and in particular reduces the current transfer resistance.

It when the end face of the free terminal end of the clamping leg extends at an angle in the range of 65 ° to 85 ° to the plane of the clamping leg in the region of the free terminal end is particularly advantageous. The end face is not perpendicular from the plane of the clamping leg, but is obliquely formed for this purpose. In this way, an even sharper edge contact is provided, as with an end face, which is provided at a simple rectangular sheet metal part at the free terminal end. With such an oblique cut for the end face in the range of 65 ° to 85 °, and preferably about 70 °, the normative conductor holding forces are increased so that the electrical conductor is better secured against being pulled out.

The at least one conductor clamping element is preferably installed in an insulating material housing to form a conductor terminal. The insulating housing has at least one conductor insertion opening leading to an associated free terminal end of a clamping leg.

In this case, a variant is conceivable in which a plurality of independent conductor clamping elements are installed side by side in an insulating material to form a multi-pole conductor terminal. It is also conceivable, however, that a single conductor clamping element is provided in which protrude from a common base portion respectively juxtaposed clamping legs and associated overload stops on the free end portion. This corresponds analogously to a variant with a plurality of conductor clamping elements which share a common base section or whose base sections are connected to one another. In each case, a conductor insertion opening is aligned with an associated clamping leg. In this embodiment several electrical conductors can be inserted side by side in the insulating material and electrically conductively connected to each other by the conductor clamping element. In this embodiment, it is particularly advantageous if at least one aligned on an associated clamping leg test opening is provided in the insulating housing. The test opening is in the interior of the insulating material in a relation to the plane of the insulating material on the outside in the area adjacent to the test opening area oblique surface. This inclined surface on an inner side of the insulating housing adjacent to the test opening prevents bumping and coming out of curved conductors or conductor ends of a stranded electrical conductor and an abutment and emergence of obliquely inserted electrical conductors. The test opening can be used not only for checking the electrical potential on the conductor clamping element, but alternatively or additionally for opening the clamping point formed by the conductor clamping element for an electrical conductor by displacing the clamping leg in the direction of the base portion by means of an inserted into the test opening operating tool. A test opening in the sense of the present invention is therefore an opening leading to the clamping leg regardless of its purpose and in any case also includes a release opening.

The test opening is preferably arranged laterally offset from a conductor insertion axis predetermined by the conductor insertion opening, on which an electrical conductor inserted into the insulating housing and clamped to the clamping leg is positioned. This lateral offset makes it possible, in particular, to use the test opening as a release opening for an actuating tool for opening a clamping point formed by the conductor clamping element. In addition to the free terminal end of the clamping leg, a material tab may extend beyond the length of the free terminal end. This material flap is positioned below the test opening in this embodiment. With the aid of such an extended material lug, the test opening can be moved further into the rear region of the insulating material housing. The actuation of the conductor clamping element takes place via an inserted into the test opening actuating tool which acts on the material lables. The lever arm is enlarged in this way and improves the operation of the conductor clamping element.

The sheet metal part of the at least one conductor clamping element can be made of a spring metal sheet material which is e.g. can be plated with copper, be formed. A spring plate with resilient properties is provided in particular by a spring steel. Here, chromium-containing alloys are particularly suitable.

However, it is particularly advantageous if the sheet metal part is formed from a copper alloy. Although copper is less elastic than spring steel, it has the disadvantage of being easier to plastically deform. But it is more electrically conductive compared to spring steel and provides lower current transfer resistances. With the help of bent out of the free end of the sheet metal part overload stop the plastic deformation of the conductor clamping element formed from a copper alloy can be effectively prevented, so that the conductor clamping element according to the invention is particularly suitable for sheet metal parts made of copper alloy. The invention will be explained in more detail with reference to an embodiment with the accompanying drawings. Show it:

Figure 1 - perspective view of a conductor terminal with inserted electrical conductor;

Figure 2 - top view of the conductor terminal of Figure 1;

Figure 3 - side sectional view of the conductor terminal of Figure 1 and

2 in section B-B

Figure 4 - side sectional view of the conductor terminal of Figure 1 and

2 in section C-C;

FIG. 5 shows a perspective view of a conductor clamping element of the conductor connection terminal from FIGS. 1 to 4;

Figure 6 - side view of the conductor clamping element of Figure 5;

Figure 7 - side sectional view of the conductor terminal of Figures 1 to 4 without inserted conductor in section B-B;

FIG. 8 shows a side sectional view of the conductor connection terminal from FIG. 7 in FIG

Section C-C;

FIG. 9 shows a perspective view of a conductor connection terminal without an inserted conductor with a testing or actuating tool introduced into a test opening;

FIG. 10 shows a side sectional view of the conductor connection terminal from FIG. 9 with a testing or actuating tool and opened conductor clamping element introduced into the test opening;

Figure 1 1 - perspective view of another embodiment of a Le terbemmenelementes with operating tab.

FIG. 1 shows a perspective view of a conductor terminal 1, which has an insulating housing 2 and conductor clamping elements 3 incorporated therein. In the illustration, only a conductor clamping element 3 for clamping the electrical conductor 4 shown on the left side can be seen, in an associated conductor insertion opening 5 on the front side of the insulating material 2 is guided in the insulating material 2 to an associated conductor clamping element 3. It can be seen from the arranged in the interior of the insulating housing 2 conductor clamping element 3 only one protruding from the bottom of the insulating 2 protruding terminal contact 6. This terminal contact 6 is designed and provided in the illustrated embodiment as a soldering pin, inserted into a hole a board and there with a conductor track to be soldered on the one board. Conceivable, however, are also other embodiments of connection contacts 6, for example surface mount solder contacts (SMD).

However, conductor connection terminals 1 are likewise conceivable in which no connection contact 6 protrudes from the insulating material housing 2. Instead, in such an embodiment, a plurality of juxtaposed conductor clamping elements 3 may be electrically conductively connected to each other in order to connect electrically conductive to each other in the insulating 2 introduced and clamped to each associated conductor clamping elements 3 electrical conductor 4. Such a conductor terminal 1 would then be a so-called box terminal or connection terminal. It can be seen further that the insulating housing 2 is closed in the rear part with a cover 7. In the illustrated embodiment, the lid 7 is integrally connected via a film hinge 8 with the main body of the insulating housing 2. With the aid of the cover 7, the at least one conductor clamping element 3 can be introduced into the basic body of the insulating housing 2 and mounted there.

Furthermore, it can be seen that test openings 9 are introduced on the upper side of the insulating housing 2 or of the main body. It is clear that the test opening 9 with respect to the through the associated conductor insertion opening 5 and the conductor insertion axis on which a plugged into the insulating 2 and clamped to an associated conductor clamping element 3 electrical conductor 4 is positioned laterally offset. The test opening 9 thus leads into a region of the conductor clamping element 3, which is located next to the stripped free end of an inserted electrical conductor 4 and the associated free terminal end of a clamping leg of the Leitererklemm- element 3. With the aid of this test opening 9, the electrical potential at the associated conductor clamping element 3 can be measured. In addition or alternatively, the test opening 9 can be used as an actuating opening in order to open the clamping point formed by the conductor clamping element 3 for an electrical conductor 4 and to enable the removal of a clamped electrical conductor 4.

FIG. 2 shows the conductor connection terminal 1 from FIG. 1 in plan view. It is once again clear that the test openings 9 lead to an associated conductor clamping element 3 in the interior of the main body of the insulating material housing 2.

FIG. 2 also shows the section lines B-B along the conductor insertion axis, on which an electrical conductor 4 plugged into the insulating housing 2 and clamped to an associated conductor clamping element 3 is positioned. Furthermore, the section C-C can be seen parallel to this conductor insertion axis, which leads through a test opening 9.

Figure 3 shows a side sectional view of the conductor terminal 1 of Figures 1 and 2 in section B-B, i. Detect along the conductor insertion axis. In the illustrated embodiment of the conductor terminal 1, an electrical conductor 4 is inserted into the associated conductor insertion opening 5 of the insulating housing 2.

It can be seen that in the interior of the insulating material housing 2 for each electrical conductor 4 to be connected, ie. for each conductor insertion opening 5, a conductor clamping element 3 is provided. The conductor clamping element 3 is a formed piece from a sheet metal part and has a base portion 10 which rests on the bottom of the insulating housing 2. At the base portion 10 is followed by a spring bow 1 1, which merges into an obliquely extending away from the base portion 10 clamping leg 12. The free clamping end 13 of the clamping leg is bent even further away from the base portion 10 in the direction of the conductor insertion axis and electrical conductor 4 in the clamped state or in the direction of the upper side of the insulating housing 2 opposite the bottom of the insulating housing 2 and forms a clamping point for a clamped 4. It is clear that the sharp edge at the free terminal end 13 is wedged into the stripped end of the electrical conductor 4 and thus secures the electrical conductor 4 from being pulled out.

It can be seen that the connection contact 6 is exposed from the base section 10 and is bent downwards out of the bottom of the insulating housing 2 in a direction opposite to the extension direction of the spring bow 11 and of the clamping leg 12.

An electric current thus flows through the electrical conductor 4 and the free terminal end 13 via the clamping leg 12 and the spring bow 1 1 directly into the terminal contact 6. In this way, a relatively short current path is achieved.

On the side opposite the spring bow 1 1 side of the base portion 10, the free end of the base portion 10 is bent upwards in the direction clamping leg 12 and electrical conductor 4 in the clamped state or top of the insulating housing 2. This the spring bow 1 1 opposite end portion 14 forms an overload stop for the clamping leg 12 and is for this purpose on the clamping legs 12 aligned so that it abuts the free end of the end portion 14 when the clamping leg 12 is displaced towards the base portion 10 and thereby the nip For the electrical conductor 4 is sufficiently open.

In the illustrated embodiment, the overload stop already acts in a position of the clamping leg 12, in which the free clamping end 13 of the clamping leg 12 is approximately at the lowest conductor level (dashed line in Fig. 3) in the direction of base portion 10, which by the radius or the position of the cross section of the conductor insertion opening 5 of the conductor insertion opening 5 is defined in the transition to the interior of the insulating housing 2. This radius determines how far an electrical conductor 4 can be displaced in the direction of the base section 10 and limits the maximum cross section of the stripped end of an electrical conductor 4 to be connected.

It is clear that the end stop 14 forming the overload stop is bent at its free end in the direction of the free clamping end 13 of the clamping leg 12. The free end of the end portion 14 is thus bent in the direction clamping leg or in the direction of conductor insertion opening 5 of the insulating housing 2 in the installed state of the conductor clamping element 3 and in the direction of spring bow 1 1. This ensures that the conductor clamping element 3 has the largest possible length and thus a good footing on its base portion 10 and a sufficient length for the terminal contact 6 and yet forms an overload stop for the clamping leg 12.

FIG. 4 shows the conductor connection terminal 1 from FIGS. 1 to 3 in section CC, which leads through a test opening 9 parallel to the conductor insertion axis. Again, an electrical conductor 4 is inserted into the associated conductor insertion opening 5 and clamped to the associated conductor clamping element 3. The width of the clamping leg 12 may be greater than the cross section of the electrical conductor to be clamped 4 and preferably greater than the smallest diameter of the conductor insertion opening 5, so that the free terminal end 13 laterally next to the stripped free end of the electrical see ladder 4 sticking out. In addition, the center of the conductor clamping element 3 can also be arranged offset laterally with respect to the conductor insertion opening 5 or the conductor insertion direction. The test opening 9 is aligned with this laterally projecting region of the free terminal end 13 and aligned therewith. Thus, a test tool can be guided laterally next to a clamped electrical conductor 4 past the clamping leg 12 and its free terminal end 13, on the one hand to measure electrical potential, which may be applied to the clamping element 3 and on the other hand formed by the conductor clamping element 3 clamping point for removal the electrical see conductor 4 to open. For this purpose, with an actuating tool, such as, for example, a rod, a screwdriver or the like, the clamping leg 12 can be displaced in the direction of the base section 10. In order to avoid an excessive displacement of the clamping leg 12 in the direction of the base portion 10 and thus a plastic deformation, which worsen the spring properties of the Leitererklemm- element 3, an overload stop is provided. This is formed from the free end portion 14 of the base portion 10 opposite to the spring bow 1 1, which is bent in the direction clamping leg 1 and in particular in the direction of the free terminal end 13 of the clamping leg 12 opposite to the extension direction of the connection contacts 6.

From the sectional view is also clear that the lid 7 of the insulating housing 2 is latched with a latching lug 15 at a latching opening 16 at the bottom of the insulating housing 2. For this purpose, the locking lug 15 dips into the latching opening 16 and is secured against unintentional opening in a crosspiece 17 delimiting the latching opening 16 of the insulating material housing.

It is also clear that not only a terminal contact 6 protrudes below the conductor insertion opening 5 of the visible conductor clamping element 3 from the underside of the insulating housing 2. Rather, a further connection contact 6 is provided offset from the first connection contact 6, the also, now led out in the area adjacent to the lid 7 on the underside of the insulating housing 2. This connection contact is part of a further conductor clamping element 3, which is provided in addition to the visible conductor clamping element 3 for clamping a further electrical conductor 4, which can be introduced into an associated further conductor insertion opening 5 next to the first conductor insertion opening 5. In this way, multi-pole conductor connection terminals 1 can be realized, in which the connection contacts 6 are offset alternately. This improves the manageability and ensures adequate distances of the individual connection contacts 6 from one another. In addition, the conductor terminal 1 can be very mechanically fixed to a printed circuit board by soldering.

FIG. 5 shows a sketch of a conductor clamping element 3 in a perspective view. It is clear that the conductor clamping element 3 is integrally formed from a single sheet metal part. In particular, a copper alloy for the sheet metal part is suitable for this purpose. A copper alloy offers better current carrying properties than spring steel and has lower current transfer resistance. However, the spring properties of a copper alloy are not as good as the spring properties of spring steel, which is formed in particular of a chromium alloy. Therefore, in a sheet metal part made of a copper alloy to ensure that the clamping leg 12 and in particular the spring bow is deflected only limited and not plastically deformed. In this way, it must be ensured that the resilient properties of the conductor clamping element 1 are preserved.

This is achieved by the bent-up end portion 14 of the base portion 10 which forms an overload stop. It is clear that the free end of this end portion 14 is tapered. It is thus adapted to the width of the also tapered free terminal end 13 and has a width of the free terminal end 13 corresponding or even smaller width. It is also clear that the terminal contact 6 is exposed from the base portion 10. This can be done by free cutting or free punching of the terminal contact 6 from the sheet metal part in the still unbent state. In the base portion 10 then remains a slot 18 which is bounded by two side webs. A portion of the material of the base portion 10 is thus used to form the terminal contact 6. The terminal contact 6 may have at least one bend 1 9 in order to secure the conductor terminal 1 and the conductor clamping element 3 without soldering for better handling in a bore of a printed circuit board.

It can also be seen that the free clamping end 13 with respect to the plane, which is spanned by the clamping leg 12 in the region of the transition to the spring bow 1 1 to the free terminal end 13 upwards, ie. is bent away from the base portion 10. Thus, the free terminal end 13 is presented in the direction of conductor insertion axis or electrical conductor 4 and the angle between the top of the free terminal end 13 and a clamped electrical conductor 4 in comparison to the angle of the clamping leg 12 increases. By this kinked free terminal end 13, the normative conductor holding forces are improved (increased) compared to a solution without such a kink.

Furthermore, it becomes clear that on the side edges of the base portion 1 0 locking elements 20 are provided in the form of protruding locking lugs or detent recesses. In this way, the conductor clamping element can be caulked in the insulating housing 2 or held in a form-fitting and secure position. In the area of the spring bow 1 1, the exposed terminal contact 6 ensures a secure position.

For the adjacent conductor clamping element 3 with an alternately offset terminal contact 6, these locking elements 20 can then be provided in the area of the spring bow 11 on the base section 110. FIG. 6 shows a side view of the conductor clamping element 3 from FIG. 5. In this case, it is clear that the end section 14 exposed from the base section 10 is aligned with the free clamping end 13 to form an overload stop so that the free clamping end 13 on displacement of the clamping leg 12 in the direction of the base section 10 on the front side of the exposed end portion 14 abuts.

It can also be seen that the free clamping end 13 with respect to the plane otherwise clamped by the clamping leg 12 with an internal angle ß in the range of about 140 ° to 170 ° and preferably of about 160 ° with the usual tolerance (+ - 5 °) of the Base section 1 0 further bent out.

It is also clear that the free terminal end in an end face S runs out, which is not aligned as usual at an angle of 90 ° to the plane of the free terminal end 1 3. Rather, this end face S is inclined to form an angle to a clamping plane K, which is parallel to the plane of the base portion 10 and on which the sharp edge of the free terminal end 13 is in the illustrated rebounded state of the clamping leg 12. The angle α between this clamping plane K and the plane spanned by the end face S is not above a vertical end face at about 40 °, but this is increased by at least 10 °. The angle α is preferably about 50 ° to 70 ° and more preferably about 68 ° + - 5 °. The angle γ of this end face to the plane of the clamping leg 12 in the region of the free terminal end 13, however, is then approximately in the range of 65 ° to 85 ° and is preferably about 70 ° ^± a conventional tolerance.

In this way, the fulfillment of the normative conductor holding forces can be ensured. FIG. 7 shows a side sectional view in section BB of the conductor connection terminal 1 from FIGS. 1 to 4 without an inserted electrical conductor. It is clear that the bent, the spring bow 1 1 opposite end portion 14 which forms the overload stop, with its free end is slightly below a plane E, through the conductor insertion opening 5 with its smallest diameter at the lowest, ie the base portion 10 am is spanned next inner surface and which is parallel to the plane of the base portion 10. In this case, the free end of the end portion 14 is spaced approximately the thickness of the free terminal end 13 of the plane E. Now, if the clamping leg 12 is displaced toward the base portion 10, the free terminal end 13 strikes in a position on the end portion 14, in which the sharp clamping edge of the free terminal end 13 is approximately at the level E. A further displacement of the clamping leg 12 down in the direction of base portion 10 is not required to open a nip. It is thus ensured that the clamping leg 12 and the adjoining spring bow 1 1 is displaced only as much as absolutely necessary. This prevents unfavorable plastic deformation and excessive stress on the conductor clamping element 3.

FIG. 8 shows the conductor connection terminal 1 from FIG. 7 in section CC, which leads through the test opening 9. It is clear that the test opening 9 in the interior of the insulating housing 2 merges into an inclined surface 21. Compared to the plane at the top of the insulating housing 2, in which the test opening 9 is introduced, the test opening 9 in the interior of the insulating housing 2 thus runs in an oblique surface 21 in this respect. Accordingly, the conductor insertion opening 5 defines a conductor insertion axis, which runs parallel to the plane defined by the base portion 10 surface. Also with respect to this conductor insertion axis, the inclined surface 21 is inclined. By this inclined surface 21 in the insulating housing 2 in the mouth region of the test / release opening 9 is a bumping and Heraus- Kicking of crooked electrical conductors 4 or of individual wires of a stranded electrical conductor 4 or the oblique insertion of electrical conductors 4 prevented. It is also clear that the test opening 9 is aligned with the free terminal end 13 of the clamping leg 1 2 and leads to this free terminal end 13.

FIG. 9 shows a perspective view of the previously described conductor connection terminal 1 with the test or release tool 22 inserted. This test or release tool is inserted from the top of the insulating material 2 in an associated test opening 9. This can be used to measure whether an electrical potential is applied to the conductor clamping element 3. However, it is also possible to open only the clamping point formed by the clamping leg 12 for clamping an electrical conductor 4, in that the clamping leg 12 is displaced in the direction of the base section 10.

FIG. 10 shows a side sectional view of the conductor connection terminal 1 from FIG. 9 with the test and release tool 22 inserted. It becomes clear that a rod-shaped end 23 of the testing or release tool 22 abuts on the free clamping end 13 and displaces it by the action of force in the direction of the base section 10. Here, the free terminal end 13 abuts against the bent end portion 14 of the base portion 10. In this way, an overload stop is provided, which prevents further displacement of the clamping leg 12 down towards the base portion 1 0.

FIG. 11 shows a further embodiment of a conductor clamping element 3, in which a terminal contact 6 is exposed from the base section 10 while leaving two parallel webs and is bent out of the plane of the base section 10. On the clamping leg 12, in the direction of the width, next to the free clamping end 13, an actuating lug 25 protrudes, which protrudes obliquely out of the plane of the adjoining free clamping end 13. is. The actuating tab 25 protrudes beyond the free terminal end 13 and provides an actuating surface for acting with an actuating tool or with an actuation lever movably mounted in a surrounding insulating housing.

The free end of the end portion 14 is in turn bent in the direction of the free terminal end 13 and adjacent to the free terminal end 13 a stop tab 26 to form an overload stop for the clamping leg 12. Thus, the deflection of the clamping leg 12 is limited by the free terminal end 13 abuts the end face of the stop tab 26. The end of the clamping portion 14 is shortened in the width direction of the end portion 14 adjacent to the stop tab 25 to form a pocket 27 into which the operating tab 25 can dip. The end face of the clamping end 13 can likewise form an overload stop for the actuating lug 25 in the region of the pocket 27.

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Claims

claims:

Conductor terminal (1) having at least one conductor clamping element (3), which is formed integrally from a sheet metal part and a base portion

(1 0), a subsequent to the base portion (10) spring bow

(1 1) and one on the spring bow (1 1) adjoining and the base portion (10) opposite clamping leg (12), wherein the free terminal end (13) of the clamping leg (12) has a clamping edge for clamping an electrical conductor (4) forms, characterized in that a the spring bow (1 1) opposite end portion (14) of the base portion (10) from the through the base portion (1 0) spanned plane in the direction of the clamping leg (12) and an overload stop for the clamping leg ( 12).

Conductor terminal (1) according to claim 1, characterized in that a terminal contact (6) of the base portion (10) exposed and out of the plane of the base portion (10) in one of the clamping leg

(1 2) opposite direction is bent out.

Conductor terminal (1) according to claim 2, characterized in that the connection contact (6) in an at the transition of the base portion (10) to the spring bow (1 1) adjacent region or in the region of the spring root of the base portion (10) is bent out.

Conductor terminal (1) one of the preceding claims, characterized in that the free end of the overload stop forming end portion (14) is bent in the direction of the free end of the clamping leg (12).

Conductor terminal (1) according to one of the preceding claims, characterized in that the free end of the overload stop forming the end portion (14) is tapered.

Conductor terminal (1) according to one of the preceding claims, characterized in that the free clamping end (13) of the clamping leg (12) is bent away from the plane defined by the clamping leg (12) in a direction away from the base section (10).

Conductor terminal (1) according to one of the preceding claims, characterized in that the end face of the free terminal end (1 3) of the clamping leg (12) at an angle (γ) in the range of 65 ° to 85 ° to the plane of the clamping leg (12) extends in the region of the free terminal end (1 3).

Conductor terminal (1) according to one of the preceding claims, characterized in that the at least one conductor clamping element (3) is installed in an insulating housing (2), wherein the insulating housing (2) at least one to an associated free terminal end (13) of a clamping leg (12 ) has leading conductor insertion opening (5).

Conductor terminal (1) according to claim 8, characterized in that at least one on an associated clamping leg (12) aligned test opening (9) in the insulating housing (2) is provided, and that the test opening (9) in the interior of the insulating housing (2) in one in relation to the plane of the turn / surface of the insulating housing (2) in the adjacent to the test opening (9) region on the outside oblique surface (21) passes.

10. Leiteranschlussklennnne (1) according to claim 9, characterized in that the test opening (9) laterally offset from the conductor insertion opening (5) predetermined conductor insertion axis, on the one in the insulating housing (2) inserted and clamped to the clamping leg (12) electrical conductor (4) is positioned is arranged.

1 1. Conductor terminal (1) according to any one of claims 8 to 10, characterized in that in addition to the free terminal end (13) of the clamping leg (12) a material lug extends beyond the length of the free terminal end (13), wherein the material tabs below the test opening (13). 9) is positioned.

12, conductor terminal (1) according to one of the preceding claims, characterized in that the sheet metal part of the at least one conductor clamping element (3) is formed of a copper alloy.

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