DE102021111069A1 - Clamping spring, connection arrangement and connection terminal - Google Patents

Abstract

The invention relates to a clamping spring (100) for clamping a conductor (400) to be connected to a current bar (210), with a holding leg (110), a clamping leg (111) which can be moved into an open position and into a clamping position, and a Latching leg (112) which can be transferred into a holding position and into a release position, the latching leg (112) being held on an actuating element (211) in the holding position and being released from the actuating element (211) in the release position, the latching leg ( 112) has a pressure surface (117) via which the locking leg (112) can be transferred from the holding position to the release position by means of the conductor (400) to be connected, the pressure surface (117) having a section (123) bent in the direction of the clamping leg (111) has, on which a first conductor support surface (120) is formed.

Description

The invention relates to a clamping spring for clamping a conductor to be connected against a current bar. The invention further relates to a connection arrangement, a connection terminal and an electronic device.

Such connection arrangements usually have a clamping spring designed as a leg spring, which has a holding leg and a clamping leg, wherein a conductor inserted into the connection arrangement can be clamped against the current bar by means of the clamping leg of the clamping spring. If, in particular, flexible conductors are clamped, the clamping spring must already be moved into an open position by means of an actuating element before the conductor is inserted and thus actuated in order to pivot the clamping spring or the clamping leg away from the current bar so that the conductor can enter the intermediate space designed as a conductor connection space between the current bar and the clamping spring can be inserted. Only in the case of rigid and therefore stable conductors can the conductor exert sufficient force on the clamping spring or the clamping leg of the clamping spring to pivot the clamping leg away from the current bar without the user having to actuate the actuating element for this purpose. In the case of flexible conductors, the user must first pivot the clamping spring away from the current bar by actuating the actuating element, so that the flexible conductor can be inserted. The actuating element usually presses against the clamping leg of the clamping spring in order to pivot the clamping leg away from the current bar and release the conductor connection space. The actuating element is then usually held manually in this open position until the flexible conductor is inserted into the conductor connection space and can be clamped against the current bar. If the flexible conductor is introduced into the conductor connection space, the actuating element must be actuated again in order to transfer the clamping spring or the clamping leg from the open position to the clamping position and to clamp the conductor against the current bar.

The object of the invention is to provide a clamping spring, a connection arrangement, a connection terminal and an electronic device which are characterized by simplified handling when connecting a flexible conductor in particular.

The object is achieved according to the invention with the features of the independent claims. Expedient configurations and advantageous developments of the invention are specified in the dependent claims.

The clamping spring according to the invention has a holding leg, a clamping leg which can be moved into an open position and a clamping position, and a latching leg which can be moved into a holding position and a release position, the latching leg being held on an actuating element in the holding position and is released from the actuating element in the release position, the latching leg having a pressure surface via which the latching leg can be transferred from the holding position to the release position by means of the conductor to be connected, the pressure surface having a section bent in the direction of the clamping leg, on which a first Conductor support surface is formed.

According to the invention, the clamping spring is designed as a leg spring, with the clamping spring having three legs, the clamping leg, the holding leg and the latching leg. In the open position of the clamping limb, in which a conductor to be connected can be inserted into the conductor connection space or taken out again, the latching limb is in a holding position in which the latching limb on the actuating element, via which the clamping limb can be transferred from the clamped position into the open position, is held. In the open position, the clamping leg can apply a first compressive force to the actuating element, and in its holding position, the latching leg can apply a second compressive force, which acts opposite to the first compressive force, to the actuating element. The actuating element is thus braced with the clamping spring in the open position. Due to the braced arrangement of the actuating element with the clamping spring in the open position of the clamping spring, the actuating element can be automatically held in this position in order to hold the clamping spring in the open position. Actuating element and clamping spring support each other in the open position. The actuating element and the clamping spring can thus form a self-contained force system when the clamping spring is in the open position, so that when the clamping spring is in the open position, the actuating element can be held in a fixed position relative to the clamping spring by the force of the clamping spring, without the actuating element having to be moved manually or must be held in this position by means of a tool. In order to be able to connect conductors with a small conductor cross-section, in particular flexible conductors, without tools, the latching leg can have a pressure surface, in which case the pressure surface can be actuated by the conductor to be connected and by the Actuation of the pressure surface of the Locking leg can be brought out of engagement with the actuating element. The pressure surface can be arranged as an extension of a conductor insertion opening of a housing of a connection terminal, so that the conductor abuts against the pressure surface of the latching leg when it is inserted into the connection arrangement or into the conductor connection space. By applying a compressive force by means of the conductor on the pressure surface, the latching leg can be set in a pivoting or tilting movement in the direction of the conductor insertion direction, so that the latching leg can be pivoted or tilted away from the actuating element in the conductor insertion direction. The pivoting movement of the latching leg allows the latching leg to be disengaged from the actuating element and thus released from the actuating element and transferred to a release position, so that the actuating element and thus the clamping leg of the clamping spring can be transferred from the open position to the clamping position without manual assistance can. This special mechanism makes it particularly easy to connect a conductor, in particular a conductor with a small conductor cross-section and/or a flexible conductor, solely by the insertion movement of the conductor, without the user having to actuate other elements, such as the actuating element, on the connection arrangement must in order to release the clamping spring and to convert it from the clamped position to the open position. This facilitates the handling of the connection arrangement and saves time when connecting a conductor. The bracing of the actuating element with the clamping spring in the open position of the clamping spring can thus be released or eliminated by the conductor to be connected itself. The pressure surface is characterized in that it has a section which is bent in the direction of the clamping leg and on which a first conductor bearing surface is formed. This section bent in the direction of the clamping leg and the conductor support surface formed thereon make it possible for the locking leg to be actuated by means of a conductor to be connected if it tilts when it is inserted into the conductor connection space and in this tilted position abuts against the locking leg. The first conductor support surface is thus designed to be inclined or oblique to a desired conductor insertion direction. The conductor support surface is preferably inclined at an angle of 45°≦β≦80°, particularly preferably 60°≦β≦70°, to the desired conductor insertion direction. This conductor support surface formed on the bent section, which is part of the pressure surface, means that conductors that deviate from the intended conductor insertion direction when being inserted can also actuate the latching leg safely and with sufficient force to transfer it from the holding position to the release position without additional tools are required. The conductor preferably abuts against the pressure surface in such a way that its end face lies flat on the first conductor support surface, so that the highest possible triggering pressure can be exerted by the conductor on the first conductor support surface and thus on the pressure surface of the locking leg. The formation of the first conductor bearing surface on a section of the pressure surface that is bent in the direction of the clamping leg can prevent the conductor to be connected from slipping off during actuation and thus striking the latching leg.

The latching leg preferably has a free end along which the pressure surface extends and on which a second conductor bearing surface is formed. The second conductor support surface formed on the free end is preferably formed flush with the desired conductor insertion direction. If a conductor to be connected is inserted into the conductor connection space along the intended conductor insertion direction, the conductor to be connected abuts against the second conductor bearing surface of the pressure surface in order to move the latching leg from the holding position into the release position. The pressure surface can thus have two conductor bearing surfaces which can accommodate conductors with different conductor insertion angles in order to actuate the latching leg. The second conductor bearing surface is preferably formed adjacent to the first conductor bearing surface.

The first conductor support surface is preferably formed at an angle to the second conductor support surface. The first conductor bearing surface preferably extends at an angle of 140°≦α≦170°, particularly preferably at an angle of 145°≦α≦165° to the second conductor bearing surface. Conductors that tilt when being inserted into the conductor connection space and are not inserted along the specified conductor insertion direction, but at an angle to the specified conductor insertion direction, can thus be guided from the second conductor support surface to the first conductor support surface, so that regardless of the angle of the inserted conductor, a safe actuation of the latching leg in order to convert it from the holding position to the release position is possible.

The locking leg is preferably formed in one piece with the holding leg and thus with the clamping leg. The clamping spring can thus be formed with its three legs from a stamped and bent part.

The latching limb can be connected to the holding limb via a connecting section. The connection section is preferably designed such that it allows a resilient connection of the locking leg to the retaining leg, so that the locking leg relative to the holding leg is pivotable. The connection section is preferably curved. The connection section is preferably bent in such a way that the latching limb is bent away from the holding limb essentially at a 90° angle.

In order to be able to achieve a particularly good spring action of the latching leg relative to the holding leg, it is preferably provided that the latching leg tapers in the connection area in the direction of the holding leg. Preferably, the latching leg has a much smaller width in the connection area than in the region of the pressure surface or in the region of the two conductor bearing surfaces of the pressure surface of the latching leg. Immediately adjacent to the retaining leg, the attachment area preferably has a width that is more than half the width of the pressure surface of the latching leg.

The clamping spring can be designed in such a way that it can be positively connected to a current bar of a connection arrangement. In this way, a self-clamping structural unit can be achieved between the clamping spring and the current bar, since in the clamping position or initial position in which no conductor is inserted, the clamping leg can apply a compressive force against the current bar and at the same time the clamping spring can be positively connected to the current bar via its retaining leg .

In order to form the form-fitting connection between the clamping spring and the current bar, the holding leg can have at least one holding arm for holding the holding leg on a current bar. By means of the holding arm, the holding leg can engage in a form-fitting manner in the current bar, in particular in an opening or recess in the current bar. The holding arm is preferably formed on the holding leg in such a way that it protrudes beyond the connection section.

In order to be able to form a particularly stable and, in particular, non-tilting connection between the clamping spring and the current bar, the holding leg can have a first holding arm and a second holding arm, the connection section being able to be arranged between the first holding arm and the second holding arm. The two holding arms are preferably designed symmetrically to one another. The two holding arms preferably extend parallel to one another.

The object according to the invention is also achieved by means of a connection arrangement for connecting an electrical conductor, which has a current bar, a clamping spring and an actuating element, the clamping spring being designed and developed as described above and the actuating element having a holding contour for holding the latching leg of the Has clamping spring in the holding position.

In order to hold the locking leg on the actuating element in the open position of the clamping spring, the actuating element can have a holding contour. The holding contour enables the latching leg to be held securely and in a defined manner on the actuating element when the clamping spring is in the open position. In the area of the retaining contour, the latching leg can apply the second compressive force to the actuating element when the clamping spring is in the open position. The holding contour is preferably designed in the form of a special surface shape on the actuating element itself.

The current bar can have at least one opening into which the clamping spring can hook with the at least one holding arm of the holding leg. This enables a positive connection between the current bar and the clamping spring. The holding leg can preferably have two holding arms and the current bar can have two openings which are arranged at a distance from one another and into which one of the two holding arms can hook in each case.

The object according to the invention is also achieved by means of a connection terminal, in particular a terminal block, which has a housing and at least one connection arrangement which is arranged in the housing and is designed and developed as described above. A conductor insertion opening can be formed on the housing, which is formed flush with the conductor connection space of the connection arrangement and via which the conductor to be connected can be inserted into the housing and into the connection arrangement. In particular in the case of an embodiment as a terminal block which can be snapped onto a mounting rail, two such connection arrangements can also be arranged in the housing.

Furthermore, the object according to the invention is achieved by means of an electronic device which has at least one connection arrangement designed and developed as described above and/or at least one connection terminal designed and developed as described above. The electronic device can be a switch cabinet, for example, in which one or more mounting rails or mounting plates can be arranged, onto which one or more connection terminals, in particular terminal blocks, which have corresponding connection arrangements, can be snapped.

The invention is explained in more detail below with reference to the attached drawings using preferred embodiments.

• 1 eine schematische Darstellung einer Klemmfeder gemäß der Erfindung,
• 2 eine schematische Darstellung einer Anordnung mit einem Strombalken und zwei an dem Strombalken angeordneten Klemmfedern, wie sie in 1 gezeigt ist,
• 3 eine schematische Schnittdarstellung der in 2 gezeigten Anordnung,
• 4 eine schematische Darstellung einer Anschlussklemme mit einem eingeführten Leiter, und
• 5 eine schematische Schnittdarstellung der in 4 gezeigten Anschlussklemme.

Show it

• 1 a schematic representation of a clamping spring according to the invention,
• 2 a schematic representation of an arrangement with a current bar and two arranged on the current bar clamping springs, as shown in 1 is shown
• 3 a schematic sectional view of in 2 shown arrangement,
• 4 a schematic representation of a terminal with an inserted conductor, and
• 5 a schematic sectional view of in 4 terminal shown.

1 shows a clamping spring 100. The clamping spring 100 is designed as a torsion spring. The clamping spring 100 has a holding leg 110 , a clamping leg 111 and a latching leg 112 . The clamping leg 111 is connected to the holding leg 110 via an arcuate section 113 . The clamping leg 111 can be pivoted relative to the holding leg 110 so that depending on the position of the clamping leg 111 the clamping leg 111 and thus the clamping spring 100 can be transferred and positioned in an open position and in a clamping position.

The clamping leg is transferred from the clamping position to the open position by means of an actuating element 211 of a connection arrangement 200, as shown in 4 and 5 is shown.

The actuating element 211 is purely linear in a housing 310 of a connection terminal 300, as shown in 4 and 5 is shown, guided. When the clamping spring 100 is actuated in order to transfer the clamping leg 111 from the clamping position to the open position, the actuating element 211 is moved in the actuating direction B, in which the actuating element 211 is moved in the direction of the clamping spring 100 . The actuating element 211 interacts with the clamping leg 111 of the clamping spring 100 in that the actuating element 211 applies a force to the clamping leg 111 in the direction of actuation B, so that the latter is pivoted in the direction of the retaining leg 110 by the distance between the clamping leg 111 of the clamping spring 100 and to release the conductor connection space 212 formed in the current bar 210 of the connection arrangement 200 .

In the embodiment shown here, the actuating element 211 has a U-shaped cross section. The actuating element 211 has two actuating arms 213a, 213b which extend parallel to one another. A free space is formed between the two actuating arms 213a, 213b, through which the conductor 400 to be connected can be guided. The two actuating arms 213a, 213b are of such a length that they delimit the conductor connection space 212 laterally and can thus form a lateral guide for the conductor 400 to be connected, as in 4 and 5 can be seen.

On the edge surfaces of the actuating arms 213a, 213b pointing in the direction of the clamping spring 100, an actuating surface 214a, 214b is formed in each case, which interacts with the clamping leg 111 to actuate the clamping leg 111 of the clamping spring 100. The actuating element 211 rests with its two actuating surfaces 214a, 214b on the clamping leg 111 of the clamping spring 100 when this is transferred from the clamping position into the open position.

The clamping leg 111 has a clamping lug 114 and two side lugs 115a, 115b arranged to the side of the clamping lug 144. The clamping lug 114 has a clamping edge 116 at its free end, by means of which the conductor 400 to be connected is clamped against the current bar 210 .

The clamping lug 114 is arranged between the two side lugs 1115a, 115b. The clamping lug 114 is longer than the two side lugs 115a, 115b, so that the clamping lug 114 extends beyond the two side lugs 115a, 115b. The two side flaps 115a, 115b each have an arcuate shape. The two side brackets 115a, 115b can thus each form a skid which, when interacting with the actuating element 211, can slide along the actuating surfaces 214a, 214b. The actuating element 211 is thus in direct contact with the two side tabs 115a, 115b of the clamping spring 100 for actuating the clamping spring 100, whereas the clamping tab 114 has no direct contact with the actuating element 211. The clamping lug 114 is arranged in the free space formed between the two actuating arms 213a, 213b.

The third leg of the clamping spring 110, the latching leg 112, is connected to the holding leg 110, so that the holding leg 110 is arranged between the clamping leg 111 and the latching leg 112. In the embodiment shown here, the latching leg 112 extends essentially at a right angle from the Holding leg 110 gone. The latching leg 112 is configured so long that, starting from the holding leg 110 , it protrudes beyond the clamping leg 111 at least when the clamping leg 111 is in the open position. The detent leg 112 serves, among other things, to help hold the clamping spring 100 in the open position.

The latching leg 112 extends from the holding leg 110 in the direction of the conductor connection space 212 , the conductor 400 to be connected being inserted into this conductor connection space 212 in order to connect the conductor 400 and clamp it against the current bar 210 . The latching limb 112 is of such a length that it delimits the conductor connection space 212 in the direction of conductor insertion E, Es. If a conductor 400 is inserted into the conductor connection space 212 via a conductor insertion opening 311 formed on the housing 310, the conductor 400 strikes the latching leg 112, as a result of which the latching leg 112 can be deflected or pivoted in the conductor insertion direction E, Es.

The locking leg 112 is held with its free end 118 on the actuating element 211, in particular on the two actuating arms 213a, 213b of the actuating element 211, in particular latched on the actuating element 211.

As in 1 As can be seen, the free end 118 of the latching leg 112 has a T-shape, in that the free end 118 has two holding arms 122a, 122b which project laterally outwards. In the open position, the locking leg 112 is held on the first actuating arm 213a with its first holding arm 122a and on the second actuating arm 213b with its second holding arm 122b, as shown in FIG 4 and 5 can be seen.

In order to be able to ensure that the locking leg 112 is held securely in position and thus in a defined manner on the actuating element 211 in the open position, a holding contour 215a, 215b is formed on each of the two actuating arms 213a, 213b. The retaining contour 215a, 215b is formed on the actuating element 211 at a distance from the actuating surfaces 214a, 214b. In the open position, the two holding arms 122a, 122b of the latching leg 112 rest against the holding contour 215a, 215b of the actuating arms 213a, 213b in order to hold the latching leg 112 in a stationary position.

The latching leg 112 has a pressure surface 117 pointing in the direction of the conductor connection space 212, against which the conductor 400 can strike when being inserted into the conductor connection space 212 in order to release the latching leg 112 from the holding contour 215a, 215b of the actuating element 211 and thus from the holding position to the to transfer release position. The pressure surface 117 extends over a large part of the length of the locking leg 112. The pressure surface 117 extends from the free end 118 of the locking leg 112 to a connection section 119 of the locking leg 112, via which the locking leg 112 is connected to the holding leg 110.

The pressure surface 117 has a first conductor bearing surface 120 and a second conductor bearing surface 121 directly adjoining the first conductor bearing surface 120, against which the conductor 400 to be connected can abut and rest with its end face 410 in order to be able to transfer the latching leg 112 from the holding position to the release position .

The second conductor bearing surface 121 is formed in the area of the free end 118 of the latching leg 112 . The second conductor bearing surface 121 is arranged in alignment with a target conductor insertion direction Es, as shown in FIG 5 can be seen, so that a conductor 400 inserted straight through the conductor insertion opening 311 of the connection terminal 300 strikes this second conductor bearing surface 121 and thereby releases the locking leg 112 from the latching with the actuating element 211, so that the locking leg 112 is transferred from the holding position to the release position can be.

The first conductor bearing surface 120 is formed on a section 123 of the pressure surface 117 of the latching leg 112 that is bent in the direction of the clamping leg 111 . The first conductor support surface 120 is thus aligned at an angle to the second conductor support surface 121 . In the embodiment shown here, such as in 3 As can be seen, the first conductor bearing surface 120 extends at an angle of α=±165° to the second conductor bearing surface 121. The first conductor bearing surface 120 is not designed to be flush with the conductor insertion opening 311. If the connection arrangement 200 is installed in a connection terminal 300, the first conductor bearing surface 120 is slightly below the opening 312 of the conductor insertion opening 311 in the conductor connection space 212 in the direction of actuation B of the actuating element 211, as in FIG 5 can be seen arranged.

The bent section 123 and the first conductor bearing surface 120 formed thereon make it possible for the latching leg 112 to also be actuated by means of the conductor 400 to be connected if this tilts when being inserted into the conductor connection space 212 and in this tilted position, the conductor insertion direction E shown here , butts against the locking leg 112, as in 5 can be seen. The first conductor bearing surface 120 is thus formed inclined or oblique to the target conductor insertion direction Es. The first conductor support surface 120 is oriented and inclined here at an angle β=±60° to the target conductor insertion direction Es.

So that the latching leg 112 can be deflected when it is actuated by means of the conductor 400 to be connected, in order to be transferred from the holding position to the release position, the latching leg 112 is connected to the holding leg 110 in a resilient manner. The connection to the holding leg 110 is formed via the connection section 119 . The connection section 119 is formed on an end section of the locking leg 112 opposite the free end 118 . The connection section 119 opens into the curved section 123 of the pressure surface 117.

The connection section 119 is designed in such a way that it tapers in the direction of the holding leg 110 . In the area of the connection of the connection section 119 to the holding leg 110, the connection section 119 thus has the smallest width. In the embodiment shown here, the connection section 119 has a curved shape. The connecting section 119 is integrally connected to the holding leg 110 approximately in the middle of the width of the holding leg 110 .

The retaining leg 110 has two retaining arms 124a, 124b, via which the retaining leg 110 and thus the clamping spring 100 can be positively attached to the current bar 210, as shown in 2 and 3 can be seen. The two holding arms 124a, 124b are formed on an end section of the holding leg 110, to which the latching leg 112 on the holding leg 110 is also connected. The two holding arms 124a, 124b are arranged at a distance from one another, with the connection section 119 of the locking leg 112 adjoining the holding leg 110 in a free space formed between the two holding arms 124a, 124b.

The two holding arms 124a, 124b of the holding leg 110 are formed symmetrically to one another and extend parallel to one another. A free end 125a, 125b of the respective holding arm 124a, 124b has a bend so that the free ends 125a, 125b can each form a type of hook, via which the two holding arms 124a, 124b can each be inserted into an opening 216a formed on the current bar 210 , 216b can be hung.

2 and 3 show a current bar 210 on which two of the 1 shown clamping springs 100 are attached. The clamping springs 100 are held in a form-fitting manner on the current bar 210 via the two retaining arms 124a, 124b of the retaining leg 110, which are guided through the openings 216a, 216b on the current bar 210. In the starting position of the clamping spring 100 shown here, the clamping leg 111 of the clamping springs 100 abuts with its clamping edge 116 against the current bar 210. The prestressing of the clamping leg 111 causes the two clamping springs 100 to clamp against the current bar 210. This means that a closed force system can be created between the respective clamping spring 100 and the current bar 210 are formed, since the clamping spring is fixed and braced on the current bar 210 in three directions (x, y and z direction), as in FIG 2 is marked.

4 and 5 show a connection terminal 300 in which a connection arrangement 200 with a corresponding clamping spring 100 is arranged. The clamping leg 111 of the clamping spring 100 is arranged here in an open position, so that the conductor connection space 212 is released. In this open position, the clamping spring 100 and the actuating element 211 are clamped together so that the clamping spring 100 and the actuating element 211 form a closed force system in which the actuating element 211 is held in position by the clamping spring 100 without additional aids and the clamping spring 100 in turn by the actuating element 211 is held in position.

The bracing of the actuating element 211 with the clamping spring 100 takes place in that, in the open position, the clamping spring 100 applies two opposing compressive forces D1, D2 to the actuating element 211. The actuating element 211 and thus also the clamping spring 100 can be held in a stable, stationary position by these two pressure forces D1, D2 acting in opposite directions.

The first compressive force D1 acts against the direction of actuation B on the actuating element 211. The first compressive force D1 is applied to the actuating element 211 by the clamping leg 111, in particular by the side tabs 115a, 115b of the clamping leg 111. The side tabs 115a, 115b press on the actuating surfaces 214a, 214b of the actuating element 211 with the first compressive force D1 applied by the spring action of the clamping leg 111.

The second compressive force D2 acts on the actuating element 211 in the actuating direction B. The second compressive force D2 is applied by the locking leg 112 of the clamping spring 100 to the actuating element 211 by the holding arms 122a, 122b of the locking leg 112 on the holding contour 215a, 215b of the actuating element 211 are held.

The conductor 400 to be connected shown here deviates from the target conductor insertion direction Es because it has such a small conductor cross section that the conductor 400 tilts when it is inserted into the connection terminal 300 via the conductor insertion opening 311, as shown in FIG 5 can be seen. The conductor 400 is thus inserted into the conductor connection space 212 here in the conductor insertion direction E obliquely or at an angle to the desired conductor insertion direction Es.

The funnel-shaped conductor insertion opening 311 has a wall section 313 which is flush with the first conductor support surface 120 of the latching leg 112 of the clamping spring 100 . When the conductor 400 is tilted, the conductor 400 comes into contact with this wall section 313 of the funnel-shaped conductor insertion opening, so that the conductor 400 is guided along this wall section 313 to the first conductor bearing surface 120 of the pressure surface 117 of the locking leg 112 and the conductor 400 with its end face 410 comes to rest on the first conductor support surface 120, as in 5 can be seen. Without the risk of the conductor 400 slipping off the first conductor support surface 120 and thus off the pressure surface 117, it can now apply a compressive force to the locking leg 112, so that the latter can be moved out of the holding position, as shown in FIG 4 and 5 shown can be pivoted into the release position. The pivot point of the locking leg 112 during the transition from the holding position to the release position is in the area of the connection section 119.

Pushing the end face 410 of the conductor 400 against the pressure surface 117 by resting on the first conductor bearing surface 120 pivots the latching leg 112 in the desired conductor insertion direction Es, so that the latching leg 112 disengages from the holding contour 215a, 215b of the actuating element 211.

As soon as the latching leg 112 is released from the actuating element 211 and is thus in the release position, the tensioning of the clamping spring 100 with the actuating element 211 is released, since the latching leg 112 no longer exerts a second compressive force D2 on the actuating element 211. As a result, only the first compressive force D1 applied to the actuating element 211 by the clamping leg 111 acts on the actuating element 211, as a result of which the spring force of the clamping leg 111 allows the clamping leg 111 to move the actuating element 211 upwards counter to the actuating direction B, as a result of which the clamping leg also moves 111 is moved in the direction of the conductor 400 introduced into the conductor connection space 212 in order to press it against the current bar 210 via the clamping lug 114 of the clamping leg 111 and thus to clamp and connect the conductor 400 against the current bar 210 .

It is thus possible to connect and clamp a conductor 400, in particular a conductor 300 with a small conductor cross-section, without additional help.

reference list

100

clamping spring

110

holding leg

111

clamp legs

112

locking leg

113

Arched section

114

clamp strap

115a, 115b

side tab

116

clamping edge

117

printing surface

118

free end

119

connection section

120

First ladder support surface

121

Second ladder support surface

123

Curved section

124a, 124b

holding arm

125a, 125b

free end

200

connection arrangement

210

power bar

211

actuator

212

conductor connection room

213a, 213b

operating arm

214a, 214b

operating surface

215a, 215b

holding contour

216a, 216b

opening

300

terminal block

310

Housing

311

conductor entry hole

312

muzzle opening

313

wall section

400

director

410

face

B

operating direction

D1

First push force

D2

Second pressure force

E

conductor insertion direction

It

Desired conductor insertion direction

a

angle

β

angle

Claims (12)

Clamping spring (100) for clamping a conductor (400) to be connected against a current bar (210), with a holding leg (110), a clamping leg (111) which can be moved into an open position and into a clamping position, and a locking leg (112) which can be moved into a holding position and into a release position, wherein the locking leg (112) is held on an actuating element (211) in the holding position and is released from the actuating element (211) in the release position, wherein the latching leg (112) has a pressure surface (117) via which the latching leg (112) can be transferred from the holding position to the release position by means of the conductor (400) to be connected, wherein the pressure surface (117) has a section (123) which is bent in the direction of the clamping leg (111) and on which a first conductor bearing surface (120) is formed. clamping spring (100). claim 1 , characterized in that the latching leg (112) has a free end (118) along which the pressure surface (117) extends and on which a second conductor bearing surface (121) is formed. clamping spring (100). claim 2 , characterized in that the first conductor bearing surface (120) extends at an angle of 140° ≤ α ≤ 170° to the second conductor bearing surface (121). Clamping spring (100) according to one of Claims 1 until 3 , characterized in that the latching limb (112) is resiliently connected to the retaining limb (110) via a connecting section (119). clamping spring (100). claim 4 , characterized in that in the region of the connection section (119) the latching leg (112) tapers in the direction of the holding leg (110). Clamping spring (100) according to one of Claims 1 until 5 , characterized in that the holding leg (110) has at least one holding arm (124a, 124b) for holding the holding leg (110) on a current bar (210). clamping spring (100). claim 6 , characterized in that the holding leg (110) has a first holding arm (124a) and a second holding arm (124b), the connection section (119) being arranged between the first holding arm (124a) and the second holding arm (124b). Connection arrangement (200) for connecting an electrical conductor (400), with a current bar (210), a clamping spring (100) and an actuating element (211), characterized in that the clamping spring (100) according to one of Claims 1 until 7 is formed and the actuating element (211) has a holding contour (215a, 215b) for holding the latching leg (112) of the clamping spring (100) in the holding position. Connection arrangement (200) according to claim 8 , characterized in that the current bar (210) has at least one opening (216a, 216b) into which the clamping spring (100) with the at least one holding arm (124a, 124b) of the holding leg (110) is hooked. Connection terminal (300), in particular terminal block, with a housing (310) and at least one in the housing (310) arranged connection arrangement (200), which according to claim 8 or 9 is trained. connection terminal (300). claim 10 , characterized in that the housing (310) has at least one funnel-shaped conductor insertion opening (311) which has a wall section (313) which is flush with the first conductor bearing surface (120) of the latching leg (112) of the clamping spring (100). Electronic device with at least one connection arrangement (200). claim 8 or 9 and/or with at least one connection terminal (300). claim 10 or 11 .

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