EP1947738A1 - Terminal block and leaf spring contact therefor - Google Patents

Abstract

The flat spring contact has an integral soldering lug (15) made of sheet material formed at an end, which is formed in single piece made of a part of a sheet material and also has a flat spring guide (10). The sheet material is made of a spring material alloy and is platted with a conductive sheet material made of an electrically conducting material and current conducting material (4a,4b) on an upper side and the integral soldering lug is tinned.

Description

The invention relates to a flat-forming leaf spring contact for an electrical conductor terminal, which is integrally formed from a piece of sheet material and at least one end of a integrally formed from the sheet material Lötanschlussfahne and a leaf spring tongue, wherein the Lötanschlussfahne in a spring region having a width greater than the width of Lötanschlussfahne in the spring area, the leaf spring tongue is exposed from the sheet material in such a way that the leaf spring tongue adjacent sheet metal strips form a support frame for the leaf spring tongue having two parallel to the longitudinal extent of the leaf spring tongue frame side members and a frame cross member integral with the tongue root Leaf spring tongue is connected, and wherein the leaf spring tongue is bent out of the plane of the surface extension of the support frame.

The invention further relates to a conductor terminal with an insulating material housing and at least one leaf spring contact described above installed in the insulating housing such that the leaf spring tongue protrudes into an associated conductor insertion opening formed in the insulating housing.

Conductor terminal and leaf spring contacts are available in many designs. The leaf spring contacts are preferably made in one piece. The present invention is concerned with the design of a leaf spring contact, in which a leaf spring tongue is uncovered from a piece of sheet material, for example by free cutting or free punching in such a way that the sheet material strips adjacent to the leaf spring tongue form a support frame for the leaf spring tongue. The support frame comprises two spaced parallel frame side members and a frame cross member formed integrally with the tongue root of the leaf spring tongue. The leaf spring tongue is bent out of the plane of the surface extension of the support frame. The sheet material used has elastic suspension properties.

Leaf spring contacts of the aforementioned type are used for conductor terminals, as for example in the AT 402 768 B and the DE 203 03 537 U1 are shown. These conductor terminals each have fixed busbars (eg made of a rigid copper material) against which the respective electrical conductor to be connected is electrically and mechanically clamped, by means of a leaf spring tongue, for this purpose when inserting the electrical conductor in the nip of their respective sheet material Support frame is moved in, whereby in the leaf spring tongue a restoring force builds up, which is used to clamp the electrical conductor against the respective busbar.

It is for example from the DE 10 2004 030 085 A1 Also known to use a piece of spring steel sheet as a support plate for a conductor rail piece and this support plate with the spring steel sheet from which the leaf spring tongue is cut free to connect so that both spring steel plates proportionately resiliently perform the required opening stroke of the terminal point when connecting an electrical conductor.

In addition to the aforementioned types of leaf spring contacts, there are also those in which the restoring force of the leaf spring tongue is not generated by the fact that the leaf spring tongue is moved away when inserting an electrical conductor in the respective conductor nip of its support frame, but the reverse case is realized at the leaf spring tongue is moved on insertion of an electrical conductor in the respective conductor terminal point on its support frame. This design is only possible if in the manufacturing process, the leaf spring tongue is bent out in the region of the tongue root with an angle of attack from the plane of the surface extension of the support frame so that in this bending process, the material of the tongue root arc is work hardened and thus work hardened in the bent state of the leaf spring tongue. Such a leaf spring contact shows the U.S. Patent 4,673,232 ,

FR 1 049 581 A discloses a one-piece folded leaf spring contact of a resilient bronze material. From the folded sheet material is a tongue bent. This has due to the current-carrying but not resilient material on a spring terminal required for a conductor terminal.

Based on this, it is an object of the present invention to provide an improved leaf spring contact for an electrical conductor terminal, which is one-piece and flat and in addition to high spring forces also has sufficient current carrying capacity and good solderability for further processing.

The object is achieved with the leaf spring contact of the type mentioned above in that the sheet material formed from a spring material alloy and clad on at least one top with a baffle material of an electrically conductive and current-carrying conductor material and the at least one Lötanschlussfahne is tinned.

It is thus proposed to provide a one-piece leaf spring contact in that the sheet material in the core consists of a spring material alloy, which is occupied to improve the current carrying capacity with a conductor material, siw is more conductive than the spring material alloy. From this multilayer sheet material then the leaf spring tongue is exposed. At the at least one end of the leaf spring contact, the conductor material alloy plated with conductor material is also tin-plated in order to provide a good solderability of the solder terminal lug formed at the ends.

The spring sheet metal material clad with guide sheet material makes it possible to provide sufficiently high spring forces of the leaf spring tongue on account of the spring material alloy and to compensate for the conductivity and current carrying capacity of the available spring material alloys, which are not sufficient for conductor connection terminals, by the guide sheet material. By plating the spring material sheet with the baffle material, the spring properties are not significantly affected. The clad sheet metal material can also be tinned, so that the solder terminal lugs can be soldered easily, for example, in the reflow process.

The ratio of the conductivity of the spring material alloy to the conductivity should be less than 1/10, and preferably less than 1/50, and more preferably less than 1/70.

The spring material alloy is preferably a chromium-nickel alloy, as is commonly used for the contact springs of conductor terminal contacts. The conductor material may be copper or bronze or a similar good conducting material, or may be formed from an alloy containing such good conducting metals.

The leaf spring contact is preferably bent in an L-shaped or U-shaped manner so that the spring region with the support frame extends transversely to the solder connection lug. If only one Lötanschlussfahne is provided at one end of the sheet material, the leaf spring contact is preferably bent in an L-shape. In Lötanschlussfahnen at both ends of the sheet material, these Lötanschlussfahnen are preferably bent away from the spring portion in the same direction and extend parallel to each other. The leaf spring contact is then designed U-shaped.

In a leaf spring contact according to the U.S. Patent 4,673,232 For example, the spring force of the leaf spring tongue, which is bent out of a piece of sheet material with work hardening of its tongue root arch, can be improved such that the leaf spring contact as a whole continues to be of a flat design, but is distinguished by substantially higher spring forces of the leaf spring tongue. This is made possible by the fact that the frame side parts are each formed in the manner of a longitudinal carrier, which rests on end-side supports, with a support in the region of the tongue root arc and with a support in the region of the other end of the frame side member.

In contrast to the prior art, in which the support frame of the sheet material, from which the leaf spring tongue is bent, usually flat against a housing wall of the insulating housing of the conductor terminal (and thus unused only the position of the leaf spring tongue fixed), shows the preferred embodiment, that the frame side parts of the support frame in the manner of a supporting structure (ie in the manner of a support on two supports) of a bending deformation can be subjected, depending on the bending stress of the leaf spring tongue, whereby the spring forces of the leaf spring tongue (and thus the spring clamping force of the conductor terminal) are very substantially increased.

This improvement in the clamping force of the leaf spring tongue is achieved without the leaf spring contact requires a significantly larger size. It is only a small installation height for the two-sided support of the longitudinal beams of the support frame to be installed, which are advantageously constructively install such in the insulating housing of a conductor terminal that the frame rails between their supports are free of overhead loads and free of bending limitations, so that the Longitudinal support freely and can bend only in response to the bending stress of the leaf spring tongue.

A further advantageous embodiment provides that the frame longitudinal members are formed between their supports in the form of a straight and flat in the load-free state longitudinal member, as it normally corresponds to the original shape of the sheet material from which the leaf spring tongues exposed, for example, cut or punched free.

Both supports of the longitudinal members of the support frame may be insulating supports, which are formed from the material of the insulating material of the conductor terminal. However, a very convenient and functionally optimal design provides that the arranged in the region of the tongue root arc of the leaf spring tongue support is formed by an approximately 90 ° arc of the tail of the frame side member, wherein such a form sheet may preferably be 91 ° circular arc.

In conjunction with such a 90 ° -formbogen, it is advantageous if the tongue root arc of the leaf spring tongue corresponds to the form of the root-side support of the frame side member and is integrally connected to about 2/3 of its arc length with the Auflager-form arc of the frame side member. Tests by the Applicant have shown that such a 2/3 connection in the best possible way the bending stress of the leaf spring tongue in a converts corresponding bending stress of the frame side members or the bending lines (equal bending deformations) of both components coupled together.

With regard to the structural installation situation of the leaf spring contact in an electrical conductor terminal, it is advantageous if a support of the frame side member is designed as a fixed bearing and the other support of the frame side member as a floating bearing.

In the design of the leaf spring contact, in which the bending deformation is utilized, instead of the tinned Lötanschlussfahne also a clamping or screw connection or a rigid connection can be provided to another leaf spring contact.

The sheet material used for the leaf spring contact has good elastic suspension properties and has sufficient electrical conductivity in the event that the leaf spring contact clamps the electrical conductor to be connected directly against the insulating material of the insulating material of the conductor terminal, which is quite common at lower ampere currents. For this purpose, the leaf spring contact is made of a spring steel sheet which is copper-plated and tin-plated, or of a bronze material or e.g. Made of a copper base material with improved suspension properties.

It is also possible that the leaf spring contact in one piece, i. integrally formed with a lug leg, which is deformed starting from the one or the other end of the frame or the longitudinal frame and bent to the conductor terminal point that he offers an abutment for the conductor terminal point. In such a case, the electrical conductor between the leaf spring tongue and the anvil is electrically and mechanically clamped, whereby a "self-supporting" leaf spring contact is formed, which transmits no clamping force on the insulating material of the insulating material of the conductor terminal.

The leaf spring contact described above is preferably installed in an insulating housing of a conductor terminal so that the leaf spring tongue in an associated, formed in the insulating housing Conductor insertion hole protrudes. When inserting a stripped end of an electrical conductor in the conductor insertion opening, the leaf spring tongue is deflected by the electrical conductor and presses the electrical conductor against the insulating material, so as to make electrical contact of the electrical conductor with the leaf spring contact.

In order to avoid excessive deflection of the leaf spring tongue and thus an overload of the same, on the opposite side of the inlet in the conductor insertion opening side of the insulating housing, an integrally formed with the insulating material overload protection bar is provided, which protrudes into the spring area and between the support frame and the Leaf spring tongue is arranged so that the end of the leaf spring tongue rests at a defined by the overload protection bar maximum allowable deflection of the leaf spring tongue in the direction of support frame on the overload protection bar.

This at least one overload protection bar is formed, for example, on a rear side closure lid which is formed so as to be pivotable on the insulating material housing with a film hinge. When mounting the conductor terminal, the leaf spring contacts can thus be inserted from the accessible through the open back cover lid back of the insulating material in this. Subsequently, the rear side closure lid is closed and locked, wherein the formed on the inside of the back cover closure overload protection bars protrude into the interior of the insulating material so that the overload protection bars lie between the leaf spring contacts and the support frame of the leaf spring contacts.

It is also conceivable that the insulating material has no hinged mounting holes, but is executed in one piece closed. In such an embodiment, the at least one overload protection bar can in turn be integrally formed on the inside of the rear side wall of the integrally formed executed insulating housing and protrude into the conductor insertion opening. Below a conductor insertion opening is then in each case an associated Guiding channel for receiving and guiding a leaf spring contact introduced, which has a stop positioned in such a way that the leaf spring tongue during assembly of the inserted into the guide channel leaf spring contact on the overload protection bar is pivoted into the conductor insertion opening and in a subsequent displacement of the leaf spring contact from the stop away the end of Leaf spring tongue rests on the overload protection bar during deflection of the leaf spring tongue. The leaf spring tongue is thus pulled through during assembly under the overload protection bar and thereby more strongly deflected for a short time, as is permitted by the overload protection bar in the mounted state. After the leaf spring tongue has passed the overload protection bar and snaked into the conductor insertion opening, the leaf spring tongue is moved back a little, so that the overload protection bar can be effective.

If, for example, in the embodiment described below an associated guide channel for receiving a leaf spring contact in the insulating housing is provided below a conductor insertion opening, the at least one leaf spring contact in the guide channel may be caulked by deformation of the insulating material. Thus, the leaf spring contact is set relative to the insulating material.

When the back cover is integrally formed with a film hinge on the insulating, the problem arises during assembly that the lower edge of the back cover must be fitted to the bottom of the insulating housing. Due to the flexibility of the film hinge, it may happen that the lower edge of the back cover closes too far down. In order to prevent this and to allow easy fast automatic or manual production, at least one bending bollard pointing in the direction of the film hinge is integrally formed on the rear sides of the insulating housing adjacent to the film hinge. The bending bollard is designed such that when closing the back cover lid unfavorable deflection of the film hinge is prevented and thereby the lower edge of the back cover lid is suitably guided into the locking position with the bottom of the insulating material.

Figur 1 -

eine einfache Ausführungsform eines Blattfederkontaktes mit verzinnter Lötanschlussfahne und kupferplattiertem Chrom-Nickel-Federstahl;

Figur 2 -

perspektivische Ansicht einer zweiten Ausführungsform eines Blattfederkontaktes;

Figur 3 -

Seitenansicht des Blattfederkontaktes aus Figur 1;

Figur 4 -

perspektivische Teilschnittansicht eines Isolierstoffgehäuses mit darin eingebautem Blattfederkontakt und eingestecktem Leiter;

Figur 5 -

perspektivische Darstellung einer dritten Ausführungsform eines Blattfederkontaktes;

Figur 6 -

Seitenansicht des Blattfederkontaktes aus Figur 5 mit darüberliegendem Leiterende;

Figur 7 -

perspektivische Darstellung einer vierten Ausführungsform eines Blattfederkontaktes;

Figur 8 -

Seitenansicht des Blattfederkontaktes aus Figur 7 mit darüber angeordnetem Leiter;

Figur 9 -

Seiten-Schnittansicht eines einseitig geschlossen ausgeführten Isolierstoffgehäuses mit von der Rückseite einschiebbarem Blattfederkontakt;

Figur 10 -

Seiten-Schnittansicht eines einstückig geschlossenen Isolierstoffgehäuses mit von der Vorderseite einschiebarem Blattfederkontakt;

Figur 11 -

perspektivische Ansicht einer Leiteranschlussklemme von der Rückseite mit geöffnetem Rückseitenverschlussdeckel;

Figur 12 -

Seitenansicht der Leiteranschlussklemme aus Figur 11 mit geschlossenem Rückseitenverschlussdeckel;

Figur 13 -

Ausschnittsansicht der Leiteranschlussklemme aus Figuren 11 und 12 mit geöffnetem Rückseitenverschlussdeckel im Bereich des Filmscharniers.

The invention will be described below with reference to the accompanying drawings with reference to embodiments. Show it:

FIG. 1 -

a simple embodiment of a leaf spring contact with tin-plated solder tail lug and copper-plated chrome-nickel spring steel;

FIG. 2 -

perspective view of a second embodiment of a leaf spring contact;

FIG. 3 -

Side view of the leaf spring contact FIG. 1 ;

FIG. 4 -

perspective partial sectional view of an insulating housing with built-in leaf spring contact and inserted conductor;

FIG. 5 -

perspective view of a third embodiment of a leaf spring contact;

FIG. 6 -

Side view of the leaf spring contact FIG. 5 with overlying conductor end;

FIG. 7 -

perspective view of a fourth embodiment of a leaf spring contact;

FIG. 8 -

Side view of the leaf spring contact FIG. 7 with overhead conductor;

FIG. 9

Side sectional view of a one-sided closed executed insulating housing with insertable from the back leaf spring contact;

FIG. 10 -

Side sectional view of an integrally sealed insulating housing einschiebarem from the front Leaf spring contact;

FIG. 11

perspective view of a conductor terminal from the back with opened back cover;

FIG. 12 -

Side view of the conductor connection terminal off FIG. 11 with closed back cover;

FIG. 13

Sectional view of the conductor connection terminal off FIGS. 11 and 12 with opened back cover in the area of the film hinge.

FIG. 1 lets recognize a leaf spring contact 1, in which from a one-piece sheet material, a leaf spring tongue 10 is exposed and bent out. The left sheet metal material forms in the spring area 2 a support frame with longitudinal members 11. At the angle of the spring region 2, for example at right angles, a Lötanschlussfahne 15 goes off.

The sheet material is formed in the core layer 3 of a spring material alloy, for example, a chrome-nickel spring steel. The core layer 3 is clad on one side and preferably on both sides with an electrically conductive and current-carrying conductor material 4a, 4b. The conductor material 4a, 4b, for example made of copper or bronze or a copper- and bronze-containing alloy ensures the necessary for the electrical connection of an electrical conductor low electrical resistance and thus a sufficient current carrying capacity.

The Lötanschlussfahne 15 is tinned (layer 7), so that it can be soldered well.

By means of the spring material clad with baffle material, both the spring characteristics required for a one-piece leaf spring contact 1 for the leaf spring tongue 10, as well as the necessary electrical properties, in particular a low resistance and a high current carrying capacity, succeed provide, without additional busbars or special structural shapes are required.
Since the leaf spring contact is bent, the stretching direction of the plated baffle material should extend in the extension direction of the leaf spring tongue 10.

FIG. 2 shows a perspective view of a particular embodiment of the leaf spring contact 1, which is formed from a piece of sheet material in such a way that from the sheet material, the leaf spring tongue 10 is cut, with the leaf spring tongue 10 adjacent sheet metal strips are retained and used as a longitudinal beam 11 for a support frame Whose frame cross member 12 is formed integrally with the tongue root 13 of the leaf spring tongue 10.

The frame side members 11 are each supported by two end supports 14 (in the manner of a support on two supports), wherein in which in the FIG. 2 illustrated embodiment, the supports 14 are formed by the respective 90 ° -Formbogen of the end pieces of the frame longitudinal member 11.

It can be seen that the tongue root arc 13 of the leaf spring tongue 10 corresponds to the shape of the root-side support 14 and is integrally connected to about 2/3 of its arc length with the respective support form of both sides present frame side rail 11. As a result, the respective deflections of the leaf spring tongue 10 and the frame side member 11 are coupled together.

FIG. 3 shows the respective bending lines (equal bending deformations) of the leaf spring tongue 10 and the frame rails 11 in the unloaded state (which corresponds to the solid lines) and in the loaded state (corresponding to the dashed lines).

FIG. 4 allows the installation state of the leaf spring contact 1 with its frame side members 11 and the leaf spring tongue 10 in the insulating material 16 of a printed circuit conductor connection terminal recognize. For soldering in the circuit is to the in FIGS. 1 and 2 illustrated right end of the leaf spring contact 1 a Lötanschlussfahne 15 formed. The right end is at This embodiment, a so-called fixed bearing. Visible is still the conductor terminal with an inserted and clamped against the insulating material of the insulating housing 16 electrical conductor 17. The insulating material 16 has in the usual way a test port 18th

FIG. 5 leaves a third embodiment of the leaf spring contact 1 according to the second embodiment according to Figures 2 and 3 , but recognize with a Lötanschlussfahne 19, which is formed in this embodiment, the left side end of the frame rail 11. The left-side end with the Lötanschlussfahne 19 is again the fixed bearing.

This is in the FIG. 6 more clearly showing a side view of the third embodiment of the leaf spring contact 1 with resting on the end of the leaf spring tongue 10 electrical conductor 17. The right-side support 14 of the longitudinal frame member 11 is formed as a so-called floating bearing in conjunction with a plastic support 20 of the insulating housing 16.

FIGS. 7 and 8 show a fourth embodiment of the leaf spring contact 1, in which the left side support of the frame rail 11 is formed as a so-called movable bearing, and formed by a plastic support 20 of the insulating 16. Even with such a Auflagerung the frame side rail 11 of the leaf spring contact 1 are the introductory described advantages of a built according to the teachings of the invention leaf spring contact 1 available.

FIG. 9 shows a side sectional view of a particular embodiment of a conductor terminal, in which the insulating housing 16 is designed in one piece without mounting flaps for installation of the leaf spring contact 1. Below the open at the front of the insulating housing 16 conductor insertion opening 21, a guide channel 22 is provided which is adapted to the leaf spring contact 1 such that it is held in the guide channel 22 and the Lötanschlussfahnen 19 from the guide channel 22 delimiting bottom 23 of the insulating housing 16th protrude and the leaf spring contact 1 is held in the guide channel 22. To mount the conductor connection terminal of the leaf spring contact 1 is pushed from the back into the guide channel 22, wherein the leaf spring tongue 10 is strongly deflected. When the leaf spring contact 1 reaches a stop 24 provided in the front region of the guide channel 22, the leaf spring tongue 10 no longer abuts against an overload protection web 25 projecting from the rear side into the conductor insertion opening 21 and jumps up into the conductor insertion opening 21. In order to prevent excessive deflection of the leaf spring tongue 10, the leaf spring contact 1 is displaced away from the stop (from the scraped position) so far that upon deflection of the leaf spring tongue 10, the end of the leaf spring tongue 10 on the overload protection bar 25 preferably in a trough introduced thereto 26 rests. The leaf spring contact 1 can then caulked by deformation of the insulating housing 16, that are fixed to the insulating 16.

FIG. 10 shows another embodiment of a conductor terminal, in which the guide channel 22 is accessible from the front of the insulating housing 16. The stop 24 is formed on the back below the overload protection bar 25. When inserting the leaf spring 1 in the Isolierstoffgehäuse 16, the leaf spring tongue 10 is initially deflected so far that it is moved below the lower wall 27 of the conductor insertion opening 21 over until it can sneak into the conductor insertion opening 21 due to there mounted material cut in the insulating housing 16. The leaf spring 1 is then moved to the stop 24 and optionally caulked with the insulating housing 16 and thereby fixed by deformed material projections 28 on the insulating housing 16.

FIG. 11 shows a further variant of a conductor connection terminal, in which the rear side of the insulating housing 16 can be closed with the aid of a rear-side closure cover 30 hinged to the insulating housing 16 with a film hinge 29. When mounting the leaf spring contacts 1 can be inserted from the back in the guide channel 22 and held by the then folded down and locked with the bottom of the insulating housing 16 back cover 30 in the insulating housing 16. On the inside of the back cover 30, an overload protection bar 25 are each formed for a leaf spring contact 1, which after closing the back cover 30 in the in FIGS. 9 and 10 shown manner between the frame rail 11 of the leaf spring contact 1 and the leaf spring tongue 10 is located.

FIG. 12 Leaves a side view of the closed conductor terminal FIG. 11 detect. When closing the back cover 30, it must be ensured that the lower edge of the back cover 30 is correctly aligned in the closed position on the rear edge of the bottom of the insulating 16 and not too far down due to unfavorable curvature of the film hinge 29. Therefore, at least one bending bollard 31, preferably a bending bollard 31 per leaf spring contact 1, is provided on the rear side of the insulating housing 16, which is arranged adjacent to the film hinge 29 and assigns it to the film hinge 29 in such a way that at an unfavorable deflection of the film hinge 29 this on the Bending bollard 31 abuts and is deflected so that it is ensured that the lower edge of the back cover 30 is suitably guided in the closed position.

Claims (17)

A leaf spring contact (1) for an electrical conductor connection terminal which is formed integrally from one piece of sheet material and has at at least one end a solder terminal lug (15) integrally formed from the sheet material and a leaf spring tongue (10), the solder terminal lug (15) being in a spring region ( 2) with a width greater than the width of the Lötanschlussfahne (15) and in the spring portion (2) the leaf spring tongue (10) is exposed from the sheet material in such a way that the leaf spring tongue (10) adjacent sheet material strip a support frame for the leaf spring tongue ( 10) having two parallel to the longitudinal extension of the leaf spring tongue (10) frame side parts and a frame cross member which is integrally connected to the tongue root of the leaf spring tongue (10), and wherein the leaf spring tongue (10) bent out of the plane of the surface extension of the support frame is, characterized in that the sheet material of a Federm Ateriallegierung formed and plated on at least one upper side with a Leitblechmaterial of an electrically conductive and current carrying conductive material and the at least one Lötanschlussfahne (15) is tinned. Leaf spring contact (1) according to claim 1, characterized in that the spring material alloy is a chromium-nickel alloy. Leaf spring contact (1) according to claim 1 or 2, characterized in that the conductor material is copper or bronze or is formed from a copper and / or bronze-containing alloy. Leaf spring contact (1) according to one of the preceding claims, characterized in that the spring region (2) with the support frame extends transversely to the Lötanschlussfahne (15). Leaf spring contact (1) according to one of the preceding claims, characterized in that the leaf spring tongue (10) manufacturing technology in Area of its tongue root is bent out with a shallow angle of attack from the plane of the surface extension of the support frame, whereby the material of the tongue root arc is cold solidified in the bent-out state, and in that the frame side parts each in the manner of a side rail (11) are formed on two end supports (14), with a support in the area of the root canal arch (13) and a support in the area of the other end of the frame side member. Leaf spring contact (1) according to claim 5, characterized in that the frame longitudinal members between their supports are free of overlying loads and free of bending limitations. Leaf spring contact (1) according to claim 5 or 6, characterized in that the frame longitudinal members are formed between their supports in the form of a straight and flat in the load-free state longitudinal member. Leaf spring contact (1) according to one of claims 5 to 7, characterized in that the root-side support is formed by an approximately 90 ° -formbogen of the end piece of the frame longitudinal member. Leaf spring contact (1) according to claim 8, characterized in that the tongue root arc (13) of the leaf spring tongue corresponds to the shape of the root-side support (14) of the frame side member and is integrally connected to about 2/3 of its arc length with the support form arch of the frame side member. Leaf spring contact (1) according to one of the preceding claims, characterized in that the support (14) is formed at the non-root end of the frame side member by a plastic support (20) of the insulating material of the conductor terminal. Leaf spring contact (1) according to one of the preceding claims, characterized in that a support (14) of the frame longitudinal member as Fixed bearing and the other support (14) of the frame side member (11) is designed as a floating bearing and that the fixed bearing associated end of the frame side member (11) has a soldering, clamping or screw connection. Conductor terminal with an insulating housing (16) and at least one in the insulating housing (16) built-in leaf spring contact (1) according to any one of the preceding claims, that the leaf spring tongue (10) protrudes into an associated, in the insulating housing (16) formed conductor insertion opening (21) , Conductor terminal according to claim 12, characterized in that on the inlet in the conductor insertion opening (21) opposite side of the insulating housing (16) integral with the insulating material (16) shaped overload protection bar (25) protrudes into the spring portion (2) and between the support frame and the leaf spring tongue (10) is arranged such that the end of the leaf spring tongue (10) rests on the overload protection web (25) in the direction of the support frame when the maximum permissible deflection of the leaf spring tongue (10) is defined by the overload protection web (25). Conductor terminal according to claim 12 or 13, characterized in that the at least one overload protection web (25) on a pivotally on the insulating housing (16) integrally formed with a film hinge (29) back cover cover (30) is formed. Conductor terminal according to Claim 14, characterized in that at least one bending bollard (31) pointing in the direction of the film hinge (29) is formed on the rear side wall adjacent to the film hinge (29) in such a manner that when the rear closure cover (30) is closed by the at least one bending bollard (30). 31) a bending movement of the film hinge (29) is prevented, in which the film hinge (29) opposite lower edge of the back cover lid (30) abuts the rear edge of the bottom of the insulating material (16). Conductor terminal according to claim 12 or 13, characterized in that the at least one overload protection bar (25) on the inside of the rear side wall of the integrally formed closed insulating housing (16) is formed and in the conductor insertion opening (21) protrudes and that below a conductor insertion opening (21) respectively an associated guide channel (22) for receiving and guiding a leaf spring contact (1) is introduced, which has a stop (24) positioned in such a way that the leaf spring tongue (10) engages during assembly of the leaf spring contact (1) inserted into the guide channel (22) the overload protection bar (25) is pivoted into the conductor insertion opening (21) and in a subsequent displacement of the leaf spring contact (1) away from the stop the end of the leaf spring tongue (10) rests on the overload protection bar (25) at maximum deflection of the leaf spring tongue (10). Conductor terminal according to one of claims 12 to 16, characterized in that below a conductor insertion opening (21) each have an associated guide channel (22) for receiving a leaf spring contact (1) in the insulating housing (16) is provided and the at least one leaf spring contact (1) in the guide channel (22) is caulked by deformation of the insulating housing (16).

Images