CONTACT INSERT FOR A CONDUCTOR CONNECTION TERMINAL

Description

[0001] The invention relates to a contact insert for a conductor connection terminal with a busbar piece and a clamping spring, wherein the clamping spring has a clamping leg with a clamping edge for clamping an electrical conductor and wherein the clamping edge of the clamping leg and the busbar piece form a clamping point for the electrical conductor to be clamped.

[0002] DE 20 2018 103 699 U1 discloses an electrical terminal with a spring-loaded terminal formed from a clamping spring and a busbar. The busbar has a holding frame and a busbar section, wherein the holding frame forms a closed frame and an electrical conductor can be inserted through an opening in the holding frame.

[0003] DE 198 17 925 A1 describes a spring-loaded terminal connection for electrical conductors, consisting of a busbar and a clamping spring, which has a rear spring arch and, extending therefrom, a contact leg resting against the busbar and a clamping leg bent in the manner of a loop, the free end of which tapers transversely towards the free end of the busbar. The free end of the clamping leg has a window recess through which the free end of the busbar extends such that the lower edge of the window recess forms a clamping point against the underside of the busbar and clamps an electrical conductor inserted between the lower edge of the window recess and the busbar against the underside of the busbar. The end piece of the busbar, on which the clamping spring is placed, has two floors and a section of the busbar extending between them as a floor support.On the lower floor, the contact leg of the clamping spring rests against the conductor rail, and on the upper floor, there is a platform bent from the floor support toward the window recess of the clamping leg of the clamping spring. The platform's free end extends through the window recess to form a clamping point for the electrical conductor between the underside of this platform and the lower edge of the window recess. Between the two floors, there is a wall opening through which the end of the electrical conductor inserted into the clamping point can extend into the interior of the clamping spring.

[0004] EP 1 005 107 A2 discloses a plug-in terminal for connecting the ends of at least two electrical cables, comprising an insulating housing, at least two receptacles for one cable each, a first holding element and a second holding element which is spring-loaded in the direction of the first holding element and, together with the first holding element, is designed to clamp a cable end inserted between the two. There is an actuating element for opening the holder formed by the holding elements, as well as a third holding element which is spring-loaded and, together with the first and / or second holding element, forms a second holder for a cable inserted between these holding elements, which second holder is not opened when the main holder is opened by the actuating element.The plug-in terminal therefore contains two holders for the free end of the stranded wire, whereby one holder must be opened by the actuating element and the second holder can be opened with such little force that this is also possible by inserting a stranded wire.

[0005] JP H09 63664 A discloses a spring-loaded conductor terminal in which a wire insertion space is secured to facilitate the insertion of a conductor. The ends of one side of a fixed part of the clamping spring and a movable part of the clamping spring are formed as free ends, and the ends of the other side of the fixed part of the clamping spring and the movable part of the clamping spring are integrally connected by a circular arc-shaped connecting spring. A pair of connecting output pieces protrude from both sides of the free end of the fixed part in the width direction to move the movable part. The tips of the connecting output pieces are integrally connected to each other by a connecting member. While a locking member opposite the movable part is provided on the connecting member, the space between the movable part and the locking member serves as a conductor holding part.An electrical conductor can be inserted between the movable part and the locking element of a connecting terminal assembled in this way and electrically connected by the spring force of the clamping spring.

[0006] Based on this, it is the object of the present invention to provide an improved contact insert.

[0007] The object is achieved with a contact insert having the features of claim 1. Advantageous embodiments are described in the subclaims.

[0008] In the generic contact insert, it is proposed that at least two side webs are arranged on the clamping spring on opposite sides of the clamping spring, wherein the free ends of the side webs are connected to one another via a cross web and wherein the side webs and the cross web form a cutout on the clamping spring that is closed on the reverse side and wherein the busbar piece extends between the side webs at least when the clamping point is closed, wherein the busbar piece passes through the cutout that is closed on the reverse side at least twice.

[0009] A closed terminal point can mean, in particular, that the electrical conductor cannot be inserted into the contact insert and clamped at the terminal point by the clamping edge of the clamping leg. Furthermore, a closed terminal point can mean that an already clamped electrical conductor cannot be removed from the contact insert, or at least not without damaging the contact insert or the electrical conductor. The electrical conductor is thus held to the busbar section by the spring force of the clamping spring when the terminal point is closed.

[0010] A double penetration can in particular mean that the conductor rail section extends through the cutout closed on the reverse side at two different points of the cutout closed on the reverse side.

[0011] The conductor rail section can thus both enter through the cutout closed on the reverse and extend back out of the cutout closed on the reverse.

[0012] The closed cutout on the reverse side and the extension of the busbar section between the side bars secure the clamped electrical conductor against lateral breakout. The side bars thus provide a lateral limit for the clamped electrical conductor.

[0013] In this way, it can be prevented that in the case of electrical conductors with several strands, the strands splice when inserted into the contact insert and, for example, collide with the housing of a connector, especially if the electrical conductor is mounted outside the housing and the contact insert is subsequently inserted into the housing.

[0014] The busbar section is guided between the side bars. The side bars are therefore positioned laterally next to the busbar section, at least when the clamping point is closed, or the side bars are guided past the busbar section, at least when the clamping point is closed. This design allows the clamping spring to be positioned relative to the busbar section. It is conceivable that, when the conductor is not connected, the clamping edge rests against the busbar section and the side bars are guided around the busbar section. The side bars can, for example, be positioned near the clamping point on the clamping spring.

[0015] The crossbar, which connects the free ends of the side bars, can limit the deflection of the clamping leg by limiting the deflection of the clamping leg. The crossbar is thus designed, for example, as overload protection.

[0016] The clamping spring can have a contact leg for contact with the busbar section, with the contact leg transitioning into a spring arch, and the spring arch extending into the clamping leg. It is conceivable that the clamping spring is essentially V-shaped.

[0017] The conductor rail section can be designed to be at least predominantly closed on the circumference.

[0018] In this way, a compact contact insert can be provided. "At least predominantly" means that at least a small gap between the ends of the busbar section is conceivable. The busbar section can be designed with a closed circumferential configuration such that a through-opening formed by the closed circumferential configuration is oriented perpendicular to a conductor insertion direction. The conductor insertion direction is the direction in which the electrical conductor is inserted into the contact insert toward the terminal point.

[0019] The clamping spring can be arranged in the inner region of the busbar section enclosed by the busbar section, wherein the clamping spring can be inserted into the inner region via the through-opening, wherein the through-opening is arranged substantially perpendicular to the conductor insertion direction.

[0020] The busbar section may have an opening to guide the electrical conductor to the terminal point.

[0021] The electrical conductor can be routed to the terminal point through the opening in the busbar section. It is conceivable that the electrical conductor could be clamped to the busbar section of the contact insert outside of a housing, and the contact insert could be subsequently inserted into a housing.

[0022] The busbar section can be formed in one piece, wherein the free ends of the busbar section are bent in such a way that they lie flat against one another.

[0023] This allows a simple and constructive way to create a one-piece busbar section for a contact insert, with the free ends of the busbar section being joined together by a material fit, for example, by welding. However, other positive joining techniques are also conceivable. At least one free end can be designed as a contact pin or contact socket, for example.

[0024] The crossbar can be arranged behind the clamping point, as seen from the conductor insertion direction. Furthermore, the busbar section can advantageously extend between the side bars, with the crossbar being arranged on the side of the busbar section facing the clamping point. The crossbar can thus form an overload stop by limiting the maximum spring travel of the clamping spring.

[0025] The side webs can each be V-shaped or bow-shaped, with the side webs each projecting from the clamping spring in one direction and with one of the side webs forming an acute angle.

[0026] An angle between 0 degrees and 90 degrees (assuming a 360-degree system) is conceivable. The busbar section can pass through the closed cutout on the reverse twice, with the busbar section passing through the closed cutout once before the bend (as seen from the conductor insertion direction) and again after the bend. In this way, the busbar section first enters the closed cutout on the reverse, and then exits the closed cutout again after the bend.

[0027] In this case, the protruding tips of the bend of the respective side bar or bracket can be designed as actuating sections, allowing the clamping point to be opened and / or closed by the actuating sections. It is also conceivable for the actuating sections to interact with a push-button element or a lever element, for example.

[0028] However, it is also conceivable that the side bars are V-shaped or bow-like, without forming an acute angle.

[0029] The side webs can be arranged on the clamping leg of the clamping spring to guide the electrical conductor to the clamping point. Furthermore, the side webs can be arranged at the free end of the clamping leg, with the side webs protruding from the clamping leg as an extension of the clamping leg.

[0030] For example, the clamping leg of the clamping spring cannot deflect sideways due to the side bars. Thus, the clamping spring is guided by the limitation of the side bars with the busbar section guided between the side bars during spring deflection, reducing the likelihood of contact insert malfunction.

[0031] An arrangement of the side webs at the free end of the clamping leg can, in particular, mean that the side webs are slotted or protruded relative to the clamping leg at its free end. The free end of the clamping leg can be designed as a protruding tab, with the side webs protruding laterally from the free end of the clamping leg next to the protruding tab.

[0032] The side bars can be arranged on the contact leg of the clamping spring to guide the electrical conductor to the clamping point. Furthermore, the clamping leg can be bent toward the closed cutout on the reverse side and extend through it.

[0033] This design can, for example, increase the contact force by resting the clamping leg on the crossbar, at least when the clamping point is open and / or closed. When the clamping spring deflects, the crossbar must also deflect accordingly, allowing a higher contact force to act on the electrical conductor.

[0034] A support section can be cut out of the clamping spring, wherein the support section is designed to support the contact leg of the clamping spring.

[0035] The support section can, for example, rest with its free end on the crossbeam and support it. Thus, forces occurring, particularly those acting on the side webs and crossbeams, can be absorbed and dissipated via the support section. It is also conceivable for the support section to rest directly on the clamping leg itself and support it directly. The support section can, for example, protrude from the contact leg of the clamping spring.

[0036] In the area of ​​the cutout closed on the reverse side, a support section can be cut out of the clamping spring, in particular from the contact leg, whereby the clamping leg can be supported on the support section.

[0037] The support section serves to increase the clamping force when the electrical conductor is clamped.

[0038] The support section can, for example, extend from the crossbeam toward the closed cutout on the reverse side and penetrate this at least once, although a double penetration of the support section is also conceivable. The contact force can be increased by the support section, since the support section must also be deflected by supporting the clamping leg on the support section.

[0039] The support section can have a second clamping edge at the free end, whereby the second clamping edge and the busbar section form a second clamping point for the electrical conductor to be clamped. It is not necessary for the clamping spring to rest on the support section.

[0040] A second clamping edge can increase the clamping force on the electrical conductor or at least the number of contact applications.

[0041] The side webs can each be bent toward the contact leg, with a holding section being arranged on the busbar section and / or on the contact leg, and with at least one of the side webs or the cross web being designed to be latched to the holding section when the clamping point is open. Furthermore, a release section can be arranged on the contact insert, with the release section being designed to release the latching between the holding section and the side web or between the holding section and the cross web by applying force.

[0042] The holding section can block deflection of the clamping spring, at least when the clamping point is open, so that the clamping spring can be held in an open position. It is conceivable for the contact insert to be delivered in a pre-tensioned state so that an electrical conductor can be inserted into the contact insert without prior actuation. For example, a flared contour on the crossbar can engage around the holding section designed as a hook, so that deflection of the clamping spring, in particular of the clamping leg, can be blocked. The flared contour or the holding section designed as a hook can be bent away after an electrical conductor has been connected, for example using a tool, so that deflection of the clamping spring is no longer blocked and the electrical conductor is clamped at the clamping point.

[0043] The release section can provide a snap-in function, whereby, for example, pressure can be exerted on the release section via an inserted electrical conductor, whereby the locking between the holding section and the side web or between the holding section and the cross web is released.

[0044] The release section can be deflected around a suspension point, for example, by applying force to the electrical conductor. This also causes the holding section to which the crossbar or side bars are locked to move, while the crossbar or side bars remain stationary, allowing the locking mechanism to be released.

[0045] Furthermore, the invention relates to a method for clamping an electrical conductor into a contact insert described above. It is conceivable that, after the electrical conductor has been clamped, the contact insert with the electrical conductor is inserted into a housing. The housing can be designed, for example, as an insulating housing, in particular as an insulating housing of a connector.

[0046] The indefinite term "a" is to be understood as such and not as a number. It is also conceivable that the contact insert according to the invention has a plurality of clamping springs, in particular two, three, or four clamping springs, with each clamping spring also being assigned a clamping point for clamping at least one electrical conductor.

[0047] The invention is explained in more detail below using exemplary embodiments and the accompanying drawings. They show: Figure 1a - a contact insert in a first embodiment in a perspective view with the clamping point closed; Figure 1b - a contact insert according to <h2 style=";text-align:left;direction:ltr">Figur 1a in a side view; Figure 1c - a contact insert according to the <h2 style=";text-align:left;direction:ltr"> Figuren 1a and 1b in a side view with the terminal point open; Figure 2a - a contact insert in a second embodiment in a perspective view with the terminal point open; Figure 2b - a contact insert according to <h2 style=";text-align:left;direction:ltr"> Figur 2a in a side view; Figure 2c - a contact insert according to the <h2 style=";text-align:left;direction:ltr"> Figuren 2a and 2b in a side view with inserted electrical conductor and closed terminal point; Figure 3a - a contact insert in a third embodiment in a perspective view with closed terminal point; Figure 3b - a contact insert according to <h2 style=";text-align:left;direction:ltr"> Figur 3ain a side view; Figure 4a - a contact insert in a fourth embodiment in a perspective view with the clamping point closed; Figure 4b - a contact insert according to <h2 style=";text-align:left;direction:ltr"> Figur 4a in a side view; Figure 5a - a contact insert in a fifth embodiment in a perspective view with the clamping point closed; Figure 5b - a contact insert according to <h2 style=";text-align:left;direction:ltr"> Figur 5a in a side view; Figure 5c - a contact insert according to the <h2 style=";text-align:left;direction:ltr"> Figuren 5a and 5b in a side view with an inserted electrical conductor and the terminal point open; Figure 5d - a contact insert according to the <h2 style=";text-align:left;direction:ltr"> Figuren 5a bis 5c in a side view with an inserted electrical conductor and the terminal point closed.

[0048] <h2 style=";text-align:left;direction:ltr"> Figur 1ashows a contact insert 1 in a first embodiment in a perspective view. The contact insert 1 has a busbar piece 2 and a clamping spring 3, wherein the clamping spring 3 has a contact leg 3a for contact with the busbar piece 2 and wherein the contact leg 3a merges into a spring arch 3b. The spring arch 3b extends into a clamping leg 3c. The clamping leg 3c has a clamping edge 4, wherein the clamping edge 4 and the busbar piece 2 form a clamping point for an electrical conductor to be clamped. The clamping point is the point at which the electrical conductor is clamped to the busbar piece 2 by the clamping edge 4 of the clamping leg 3c. The clamping point is in the <h2 style=";text-align:left;direction:ltr"> Figur 1a closed.

[0049] It is clear that two side webs 5 are arranged from the free end of the clamping leg 3c, i.e., from the clamping edge 4, of the clamping spring 3, wherein the side webs protrude from the clamping leg 3c as an extension of the clamping leg 3c. The side webs 5 are arranged on opposite sides of the clamping spring 3, wherein the free ends of the side webs 5 are connected to one another by a transverse web 6. The side webs 5 and the transverse web 6 form a cutout 7 on the clamping leg 3c of the clamping spring 3, which is closed on all sides, wherein the busbar piece 2 extends between the side webs 5.

[0050] It can also be seen that the side webs 5 are bent in a V-shape, or bow-like, and form an acute angle in the bend. The side webs 5 initially extend laterally past the busbar section 2, so that the busbar section 2 is arranged between the side webs 5 and the side webs 5 extend from the side of the busbar section 2 facing the clamping point to the side of the busbar section 2 facing away from the clamping point. The side webs 5 therefore extend away from the busbar section 2. On the side of the busbar section 2 facing away from the clamping point, the side webs 5 are bent back towards the busbar section 2, whereby an acute angle is formed in the bend.The side webs 5 extend back from the side of the busbar section 2 facing away from the terminal points to the side of the busbar section 2 facing the terminal point, with the cross web 6 connecting the free ends of the side webs 5 on the side of the busbar section 2 facing the terminal point. The side webs 5 thus extend in a bracket-like manner next to the busbar section 2.

[0051] It is also clear that the busbar section 2 passes through the cutout 7 closed on the reverse twice, with the busbar section 2 passing through the cutout 7 closed on the reverse once before the bend as seen from the conductor insertion direction L and once again after the bend.

[0052] It can also be seen that the busbar section 2 is closed on the circumference, wherein the busbar section 2 is formed in one piece and the free ends 2a of the busbar section 2 are bent such that they lie flat against one another. The free ends 2a of the busbar section 2, which lie flat against one another, can be connected to one another, for example, by a material fit. A contact socket 8 for clamping a contact pin is arranged on one of the free ends 2a of the busbar section 2. The clamping spring 3 is arranged in the inner region enclosed by the busbar section 2, wherein the clamping spring 3 can be inserted into the inner region via the through-opening, wherein the through-opening is arranged essentially perpendicular to a conductor insertion direction L.

[0053] The busbar section 2 has an opening 9, wherein an electrical conductor can be guided through the opening 9 to the terminal point in the conductor insertion direction L. The opening 9 is arranged on the opposite side of the socket contact 8 on the busbar section 2.

[0054] <h2 style=";text-align:left;direction:ltr"> Figur 1b shows a contact insert 1 after <h2 style=";text-align:left;direction:ltr"> Figur 1ain a side view. It can be seen that a holding section 10 is cut out of the busbar section 2. The holding section 10 is designed to latch with the crossbar 6 when the clamping point is open. The crossbar 6 has, for example, laterally projecting sections 6a, i.e., aligned transversely to the conductor insertion direction L, which interact with the holding sections 10. The contact insert 1 according to the invention can thus, for example, already be brought into a pre-tensioned state at the factory and delivered. After an electrical conductor has been connected, the holding section 10 can be bent away, for example with a tool, whereby the clamping spring 3 is released and the electrical conductor is clamped to the busbar section 2.

[0055] <h2 style=";text-align:left;direction:ltr"> Figur 1c shows a contact insert 1 according to the <h2 style=";text-align:left;direction:ltr"> Figuren 1a and 1bin a side view with the clamping point open, wherein the crosspiece 6 is locked to the holding section 10 of the busbar section 2. It can be seen that the holding section 10 is designed as flared hooks, wherein the flared hooks block a deflection of the clamping leg 3c when the clamping point is open.

[0056] From the <h2 style=";text-align:left;direction:ltr"> Figuren 1a bis 1cIt becomes clear that during the maximum deflection of the clamping leg 3c of the clamping spring, the bow-shaped bent side webs 5 are only deflected to such an extent that the busbar section 2 continues to extend between the bow-shaped side webs 5. Only when the clamping point is open does the busbar section 2 no longer extend between the side webs 5. However, it is conceivable that the contact insert 1 is dimensioned in such a way that even when the clamping point is open, i.e. the maximum deflection of the clamping leg 3c of the clamping spring 3, the busbar section 2 extends between the side webs 5.

[0057] The <h2 style=";text-align:left;direction:ltr"> Figur 2a shows a contact insert 1 in a second embodiment in a perspective view with the terminal point open. <h2 style=";text-align:left;direction:ltr"> Figur 2a differs from the first embodiment according to the <h2 style=";text-align:left;direction:ltr"> Figuren 1a bis 1cin that the holding section 10 is not free from the busbar piece 2, but that the holding section 10 is formed by the contact leg 3a of the clamping spring 3.

[0058] <h2 style=";text-align:left;direction:ltr"> Figur 2b shows a contact insert 1 after <h2 style=";text-align:left;direction:ltr"> Figur 2a in a side view. It is clear that the crossbar 6 engages with the holding section 10 of the contact leg, so that the clamping leg 3c can be held when the clamping point is open.

[0059] It can also be seen that a release section 12 is arranged on the contact leg 3a, wherein the release section 12 is designed to release the locking connection between the holding section 10 and the crosspiece 6. The force can be applied, for example, by inserting an electrical conductor by exerting pressure on the release section 12 through the free end of the electrical conductor. The release section 12 is arranged at the free end of the contact leg 3a of the clamping spring 3.

[0060] <h2 style=";text-align:left;direction:ltr"> Figur 2c shows a contact insert 1 according to the <h2 style=";text-align:left;direction:ltr"> Figuren 2a and 2b in a side view with inserted electrical conductor 13. It is clear that by applying force to the release section 12, the locking between the holding section 10 and the crossbar 6 is released, so that the clamping leg 3c clamps the electrical conductor 13 to the busbar section 2. The release section 12 can be deflected about a suspension point by applying force to the electrical conductor 13. In the process, the holding section 10 to which the crossbar 6 or the side bars 5 are locked also moves, whereby the crossbar 6 or the side bars 5 themselves do not experience any movement, whereby the locking connection can be released. The clamping point is thus closed and the electrical conductor 13 cannot be removed from the contact insert 1 without external influences.

[0061] The second embodiment according to the <h2 style=";text-align:left;direction:ltr"> Figuren 2a bis 2cotherwise corresponds to the first embodiment according to the <h2 style=";text-align:left;direction:ltr"> Figuren 1a bis 1c .

[0062] <h2 style=";text-align:left;direction:ltr"> Figur 3a shows a contact insert 1 in a third embodiment in a perspective view with the clamping point closed, wherein <h2 style=";text-align:left;direction:ltr"> Figur 3b a contact insert 1 after <h2 style=";text-align:left;direction:ltr"> Figur 3a in a side view. In contrast to the first embodiment according to the <h2 style=";text-align:left;direction:ltr"> Figuren 1a bis 1c and the second embodiment according to the <h2 style=";text-align:left;direction:ltr"> Figuren 2a bis 2c It becomes clear that the side webs 5 do not protrude from the clamping leg 3c. Rather, the side webs 5 protrude from the free end of the contact leg 3a, with the free ends of the side webs 5 being connected to one another via the cross web 6, forming a closed cutout 7 on the clamping spring.

[0063] It can also be seen that the side webs 5 are bent in a V-shape, or rather, bow-like, and form an acute angle in the bend. The side webs 5 initially extend away from the contact leg 3a in the direction of the busbar section 2, as an extension of the contact leg 3c, so that the contact leg 2 is arranged between the side webs 5. The side webs 5 are then bent back toward the contact leg 3a.

[0064] It is clear that, viewed from the conductor insertion direction, the clamping leg 3c passes through the closed cutout 7 at least once before the bend in the side webs 5. It is also conceivable that the clamping leg 3c passes through the closed cutout 7 twice, namely once before the bend in the side webs 5 and once after the bend in the side webs 5.

[0065] The clamping leg 3c can rest on the crossbar 6, at least when the clamping point is open and / or when the clamping point is closed with an inserted electrical conductor, thereby increasing the contact force. By supporting the clamping leg 3c on the crossbar 6, the crossbar 6 must also be deflected.

[0066] Furthermore, in contrast to the first and second embodiments according to the <h2 style=";text-align:left;direction:ltr"> Figuren 1a bis 2c neither a holding section 10 nor a release section 12 is arranged. Otherwise, the third embodiment corresponds to the <h2 style=";text-align:left;direction:ltr"> Figuren 2a bis 2b .

[0067] <h2 style=";text-align:left;direction:ltr"> Figur 4a shows a contact insert 1 in a fourth embodiment in a perspective view with the clamping point closed, wherein <h2 style=";text-align:left;direction:ltr"> Figur 4b a contact insert 1 after <h2 style=";text-align:left;direction:ltr"> Figur 4a in a side view. In contrast to the fourth embodiment according to the <h2 style=";text-align:left;direction:ltr"> Figuren 3a and 3bA support section 14 is provided on the crossbeam 6 in the area of ​​the cutout 7a closed on the reverse. The support section 14 extends from the crossbeam 6 in the direction of the cutout 7a closed on the reverse and passes through it at least once, although it is conceivable that the support section 14 could pass through it twice.

[0068] It is clear that the clamping leg 3c is supported on the support section 14, whereby the contact force can be increased since by supporting the clamping leg 3c on the support section 14 the support section must also be deflected.

[0069] Due to the exposed support section 14, it may be advantageous to support the contact leg 3c via a support section 15. The support section 15 is in the fourth embodiment according to the <h2 style=";text-align:left;direction:ltr"> Figuren 4a and 4bcut free from the contact leg 3a of the clamping spring 3, with the support section 15 resting with its free end on the crossbeam 6 and supporting it. Forces arising in this way, in particular the forces occurring on the side webs 5 and crossbeam 6, can be absorbed and dissipated via the support section 15. It is also conceivable that the support section 15 rests directly on the clamping leg 3c itself and directly supports it.

[0070] It can also be seen that a second clamping edge 16 is arranged at the free end of the support section 14, wherein the second clamping edge 16 and the busbar section 2 form a second clamping point for the electrical conductor to be clamped. In this way, the clamping force on the electrical conductor, or at least the number of contact applications, can be further increased, and the clamped electrical conductor can be held in position. The second clamping edge 16 can also be formed independently of the support of the clamping leg 3c on the support section 14.

[0071] The fourth embodiment according to the <h2 style=";text-align:left;direction:ltr"> Figuren 4a and 4b otherwise corresponds to the third embodiment according to the <h2 style=";text-align:left;direction:ltr"> Figuren 3a and 3b .

[0072] <h2 style=";text-align:left;direction:ltr"> Figur 5a shows a contact insert 1 in a fifth embodiment in a perspective view with the clamping point closed, wherein <h2 style=";text-align:left;direction:ltr"> Figur 5b a contact insert 1 after <h2 style=";text-align:left;direction:ltr"> Figur 5ain a side view. In contrast to the fourth embodiment according to the <h2 style=";text-align:left;direction:ltr"> Figuren 4a and 4b In the fifth embodiment, a holding section 10 is arranged on the support section 14, wherein the holding section 10 is designed as protruding claws. It is also conceivable for the holding section 10 to be designed as a hook.

[0073] <h2 style=";text-align:left;direction:ltr"> Figur 5c shows a contact insert according to the <h2 style=";text-align:left;direction:ltr"> Figuren 5a and 5b in a side view with an inserted electrical conductor 13 and the clamping point open. It is clear that the clamping leg 3c is designed to engage with the holding section 10 of the support section 14, whereby the clamping leg 3c is thus held with the clamping point open and the electrical conductor 13 can be inserted into the contact insert 1.

[0074] <h2 style=";text-align:left;direction:ltr"> Figur 5d shows a contact insert according to the <h2 style=";text-align:left;direction:ltr"> Figuren 5a bis 5cin a side view with an inserted electrical conductor and the clamping point closed. It is clear that a release section 12 is arranged at the free end of the support section 14. When force is applied to the release section 12 by the free end of the electrical conductor 13, the locking between the holding section 10 and the clamping leg 3c is released, thus clamping the electrical conductor 13 to the busbar 2.

[0075] The fifth embodiment according to the <h2 style=";text-align:left;direction:ltr"> Figuren 5a bis 5d Otherwise corresponds to the fourth embodiment according to the <h2 style=";text-align:left;direction:ltr"> Figuren 4a and 4b .

[0076] A clamping of electrical conductors can be carried out using a method for clamping the electrical conductor into a contact insert 1 described above according to the embodiments according to the <h2 style=";text-align:left;direction:ltr"> Figuren 1a bis 5dIt is conceivable that, after the electrical conductor has been connected, the contact insert with the electrical conductor is inserted into a housing. The housing can be designed, for example, as an insulating housing, in particular as an insulating housing for a connector. <h2 style=";text-align:left;direction:ltr"> Bezugszeichenliste

[0077] 1Contact insert 2Busbar section 2aFree ends of the busbar section 3Clamping spring 3aContact leg 3bSpring arch 3cClamping leg 4Clamping edge 5Side webs 6Cross web 6aProtruding sections 7Cutout closed on both sides 8Socket contact 9Opening 10Holding section 11Through opening 12Release section 13Electrical conductor 14Support section 15Support section 16Second clamping edge LConductor insertion direction

Claims

1. Contact insert (1) for a conductor connection terminal with a busbar piece (2) and a clamping spring (3), wherein the clamping spring (3) has a clamping leg (3c) with a clamping edge (4) for clamping an electrical conductor (13), and wherein the clamping edge (4) of the clamping leg (3c) and the busbar piece (2) form a clamping point for the electrical conductor (13) to be connected, wherein - at least two lateral webs (5) are arranged on the clamping spring (3) on mutually opposite sides of the clamping spring (3), - wherein the free ends of the lateral webs (5) are connected to each other by a transverse web (6) - and wherein the lateral webs (5) and the transverse web (6) form a circumferentially closed aperture (7) on the clamping spring (3) and - wherein the busbar piece (2) extends between the lateral webs (5) at least when the clamping point is closed, characterized in that the busbar piece (2) passes through the circumferentially closed aperture (7) closed on the opposite side at least twice.

2. Contact insert (1) according to claim 1, characterized in that the clamping spring (3) has a bearing leg (3a) for bearing against the busbar piece (2), wherein the bearing leg (3a) merges into a spring bow (3b) and wherein the spring bow (3b) extends into the clamping leg (3c).

3. Contact insert (1) according to one of the preceding claims, characterized in that the busbar piece (2) is designed such that it is at least predominantly closed on its circumference.

4. Contact insert (1) according to one of the preceding claims, characterized in that the busbar piece (2) has an opening (9) for guiding the electrical conductor (13) to the clamping point.

5. Contact insert (1) according to one of the preceding claims, characterized in that the busbar piece (2) is designed as a single piece, wherein the free ends (2a) of the busbar piece (2) are bent back in such a way that they lie flat against each other.

6. Contact insert (1) according to one of the preceding claims, characterized in that the transverse web (6) is arranged behind the clamping point as viewed from the conductor insertion direction (L).

7. Contact insert (1) according to one of the preceding claims, characterized in that the busbar piece (2) extends between the lateral webs (5), wherein the transverse web (6) is arranged on the side of the busbar piece (2) facing the clamping point.

8. Contact insert (1) according to one of the preceding claims, characterized in that the lateral webs (5) are V-shaped or bow-like, wherein the lateral webs (5) project from the clamping spring in one direction and wherein the lateral webs (5) each form an acute angle.

9. Contact insert (1) according to one of the preceding claims, characterized in that the lateral webs (5) are arranged on the clamping leg (3c) of the clamping spring (3) for guiding the electrical conductor (13) to the clamping point.

10. Contact insert (1) according to claim 9, characterized in that the lateral webs (5) are arranged at the free end of the clamping leg (3c), wherein the lateral webs (5) project from the clamping leg (3c) in extension of the clamping leg (3c).

11. Contact insert (1) according to one of claims 2 to 8, characterized in that the lateral webs (5) are arranged on the abutment leg (3a) of the clamping spring (3).

12. Contact insert (1) according to claim 11, characterized in that the clamping leg (3c) is bent in the direction of the circumferentially closed aperture (7) and passes through the same.

13. Contact insert (1) according to one of claims 11 or 12, characterized in that a support section (15) is cut free from the clamping spring (3), wherein the support section (15) is designed to support the bearing leg (3c) of the clamping spring (3).

14. Contact insert (1) according to one of claims 11 to 13, characterized in that a bearing section (14) is cut free from the clamping spring (3) in the region of the circumferentially closed aperture (7), wherein the clamping leg (3c) bears on the bearing section (14).

15. Contact insert (1) according to claim 14, characterized in that the bearing section (14) has a second clamping edge (16) at the free end, wherein the second clamping edge (16) and the busbar piece (2) form a second clamping point for the electrical conductor (13) to be clamped.

16. Contact insert (1) according to one of the preceding claims, characterized in that the lateral webs (5) are bent in the direction of the contact leg (3a), wherein a retaining section (10) is arranged on the busbar piece (2) and / or on the contact leg (3a) and wherein at least one of the lateral webs (5) or the transverse web (6) is designed to be latchable with the retaining section (10) at least when the clamping point is open.

17. Contact insert (1) according to claim 16, characterized in that a release section (12) is arranged on the contact insert (1), wherein the release section (12) is designed to release the latching between the retaining section (10) and the lateral web (5) or between the retaining section (10) and the transverse web (6) by application of force.