Electrical connection terminal

Abstract

Electrical connection terminal (1) for clamping contact with an electrical conductor (2), comprising - a busbar (5) with a side wall (5a) and a contact wall (5b) formed thereon to form a conductor connection channel (8) accessible via an insertion opening (9) and a contact wall (5c) spaced therefrom, and - a clamping spring (3), in particular arranged at least partially in the conductor connection channel (8), with a contact leg (3a) in contact with or in contact with the contact wall (5b) of the busbar (5) and with a clamping leg (3b), in particular connected to this via a spring arch (3c), with a clamping edge (4) which is guided between the clamping spring (3) and the busbar (5) against the contact wall (5c) of the busbar (5) to form a clamping point (K) for clamping contact with the conductor (2) introduced in a conductor insertion direction (E) via the insertion opening (9) into the conductor connection channel (8).

Description

[0001] The invention relates to an electrical connection terminal for clamping contact with an electrical conductor, with a busbar forming a conductor connection channel and a clamping spring accommodated therein with a clamping leg connected to a contact leg via a spring arch.

[0002] In a conductor connection terminal known from DE 10 2016 111 627 A1 with a busbar section and a clamping spring, the terminal has a clamping leg oriented toward the busbar section to form a clamping point for clamping an electrical conductor, a spring arch adjoining the clamping leg, and a contact leg with a vertical section extending transversely to the busbar section. The vertical section has a recess whose edges encompass the busbar section. A contact wall adjacent to the busbar section is designed to support the vertical section of the contact leg of the clamping spring.

[0003] DE 10 2015 017 151 A1 discloses a conductor connection contact element, preferably intended for direct printed circuit board contact, comprising a busbar section and a clamping spring for clamping an electrical conductor. The busbar section is formed from a sheet metal part with two opposing side walls, forming a conductor insertion channel, a base section, and an opposite cover section. A conductor guide region formed on a first side wall of the busbar section, adjacent to a clamping section of the clamping spring, is a section of the first side wall oriented obliquely toward the opposite side wall.

[0004] The invention is based on the object of providing a particularly suitable electrical connection terminal. In particular, the connection terminal is to be as compact as possible.

[0005] This object is achieved according to the invention with the features of independent claim 1, independent claim 14, independent claim 17, independent claim 18, and independent claim 19, respectively. Advantageous embodiments and further developments are the subject of the dependent claims (subclaims).

[0006] The electrical connection terminal intended and configured for clamping contact with an electrical conductor comprises a busbar with a side wall, a contact wall, and a contact wall. The contact wall and the contact wall are spaced apart from one another, preferably running parallel to one another. The preferably single side wall of the busbar is connected to the contact wall and the contact wall. The busbar is particularly preferably U-shaped, with the contact wall and the contact wall forming the U-legs, and the side wall forming the connecting leg to the U-shape.

[0007] The height of the side wall of the busbar is suitably greater than the width of the contact wall. Preferably, the height of the side wall is less than 2.5 times the width of the contact wall. Expediently, the width of the contact wall is between 50% and 80%, in particular between 60% and 75%, of the width of the contact wall. Preferably, the width of the contact wall of the busbar is between 40% and 60%, in particular (50 ± 5)%, of the height of the side wall. Suitably, the width of the contact wall of the busbar is between 50% and 80%, in particular (70 ± 5)%, of the height of the side wall.

[0008] The busbar is suitably formed from a sheet metal part, in particular as or in the manner of a stamped and bent part. Particularly expediently, the busbar forms a spring cage, in particular for a contact spring or clamping spring. The busbar forms or provides a conductor connection channel accessible via an insertion opening, hereinafter also referred to as a (conductor) connection tunnel.

[0009] The electrical connection terminal has a clamping spring with a contact leg and a clamping leg. Particularly preferably, the contact leg is connected to the clamping leg of the clamping spring via a spring arch. The clamping spring is preferably bent approximately U- or V-shaped. The clamping leg has a clamping edge at the leg-free end. Suitably, the clamping spring is accommodated at least partially, sectionally, or regionally in the conductor connection channel of the busbar. In particular, at least the clamping edge of the clamping spring is located in the conductor connection channel or tunnel of the busbar. Preferably, the clamping spring is clamped in the busbar between the contact wall and the contact wall. The contact leg rests against the contact wall of the busbar, preferably over as much of its surface as possible.

[0010] A clamping spring is understood to mean exactly one or a number of clamping springs. The clamping spring is suitable for clamping the electrical conductor. The clamping spring is advantageously formed from spring steel and bent. The clamping spring advantageously has exactly one clamping leg for clamping an associated electrical conductor, so that the same conductor is not clamped by two or more clamping legs of the clamping spring. Suitably, the contact leg and the adjoining spring bend, as well as the adjoining clamping leg, are formed as a single piece.

[0011] The contact leg of the clamping spring is designed to engage a stationary area of ​​the terminal in order to absorb the reactive spring force (restoring force). Preferably, the contact leg rests exclusively on the busbar, in particular on its contact wall. Suitably, the connection formed or provided by the clamping spring and the busbar is designed to be self-supporting. The contact leg is expediently directly connected to the clamping leg.

[0012] The clamping leg extends within the conductor connection channel to the contact wall of the busbar. Particularly preferably, the clamping leg has a bend or offset, forming two leg sections of different pitches. At the leg-free end, the clamping leg has a clamping edge, which is guided against the contact wall of the busbar, forming a clamping point for clamping the conductor guided through the insertion opening into the (conductor) connection channel.

[0013] Suitably, the leg length of the contact leg is greater than the leg length of the clamping leg of the clamping spring. Preferably, the leg length of the clamping leg of the clamping spring is between 50% and 90%, in particular between 55% and 85%, preferably between 60% and 80%, particularly preferably (70 ± 5)% of the leg length of the contact leg.

[0014] Conveniently, the spring arch of the clamping spring projects beyond the contact leg on the side opposite the clamping leg. In other words, a curved section of the spring arch that borders the contact leg or merges into the contact leg projects beyond the contact leg on its (under) side opposite the clamping leg.

[0015] According to an advantageous embodiment, the spring arc of the clamping spring projects beyond the busbar at the insertion opening. In particular, the spring arc projects beyond the contact wall of the busbar. In other words, a curved section of the spring arc that merges into the contact leg projects beyond the contact wall of the busbar. Particularly advantageously, the contact wall of the busbar has a cutout in which the spring arc or a curved section is inserted. Additionally or alternatively, the spring arc or a curved section of the spring arc projects beyond the side wall and / or the contact wall of the busbar at the insertion opening of the conductor connection channel of the busbar.

[0016] In a particularly expedient embodiment of the clamping spring, its clamping leg has an actuating section. This serves to actuate the clamping leg, in particular by means of a lever, a slider, or an actuating tool. The actuating section protrudes beyond the clamping edge, particularly preferably at least in the (conductor) insertion direction. In particular, the actuating section protrudes beyond the clamping edge in a direction transverse to the conductor insertion direction. Preferably, the actuating section protrudes beyond the clamping edge both in the conductor insertion direction and in the transverse direction parallel to the contact and / or contact wall of the busbar.

[0017] According to a suitable development, the actuating section is oriented toward the contact leg of the clamping spring. The actuating section is preferably curved, in particular oriented at the curved end toward the contact leg of the clamping spring. This provides particularly suitable actuation of the contact leg for the purpose of deflecting the clamping spring while releasing the contact point, in particular in order to reliably insert the conductor into the contact point. Furthermore, it is advantageously possible for an actuating element, in particular a pivoting lever, also referred to below as a lever, to be brought into contact with the actuating section adjacent to the contact edge (spatially next to the contact edge) of the contact leg or along the contact edge.

[0018] A suitable design of the busbar provides that the contact wall of the busbar is narrower than the contact wall or has a cutout. The actuating section of the clamping leg of the clamping spring is accessible via the cutout or due to the narrower wall width of the contact wall of the busbar in a direction normal or perpendicular to the plane of the contact wall (transverse to the conductor insertion direction). In other words, the actuating section of the clamping leg is accessible in the direction of or perpendicular to the clamping edge. This advantageously enables a particularly compact design of the connection terminal.

[0019] According to an advantageous embodiment, a recess, also referred to below as a clearance (spring clearance), is provided in the contact leg of the clamping spring. Particularly advantageously, a recess, also referred to below as a clearance (rail clearance), is provided in the contact wall of the busbar. Advantageously, the spring clearance and the rail clearance are aligned with each other. Suitably, the spring clearance and the rail clearance overlap at least partially or almost completely.

[0020] The position of the spring cutout or the position of the cutout concept formed by the spring cutout and the rail cutout is advantageously adapted to the position of the contact leg of the clamping spring deflected or pivoted against the contact leg in such a way that when the clamping spring is tensioned or when the clamping leg is pivoted, its leg-free end, in particular the actuating section of the clamping leg, can be inserted into the spring cutout or into the spring cutout and the rail cutout. This achieves a particularly compact design of the basic structure of the connection terminal formed by the busbar and the contact spring.

[0021] In other words, this free-cut concept allows the overall height or distance between the contact wall and the contact wall of the busbar to be designed to be particularly low or minimized. In addition, or with the same overall height of the conductor connection channel, a correspondingly larger space is advantageously provided within the conductor connection channel for the conductor, for example, a stranded conductor. This allows for the connection or clamping of correspondingly large conductor cross-sections.

[0022] According to an advantageous further development or configuration of the electrical terminal, in particular the basic structure of the terminal formed by the busbar and the contact spring, at least one positive connection or a positive connection (joining connection) is provided between the clamping spring and the busbar. Suitably, the at least one positive connection is formed from the material of the clamping spring and the busbar itself, i.e., without an additional joining element.

[0023] A "positive connection" or a "positive connection" between at least two interconnected parts is understood here and below in particular to mean that the interconnected parts are held together at least in one direction by a direct interlocking of the contours of the parts themselves. In other words, the "blocking" of mutual movement in this direction is due to the shape.

[0024] In particular, in this further development or embodiment, a joining extension, particularly oriented transversely to the conductor insertion direction, is formed on the contact leg of the clamping spring. A (corresponding) joining opening is expediently provided in the busbar, into which the clamping spring-side joining extension is received. The rail-side joining opening is suitably provided in or at the transition between the contact wall and the side wall, particularly in a bending area between the side wall and the contact wall.

[0025] Particularly advantageously, a joining opening with a constriction is provided in the busbar. In particular, a contact contour is provided that only acts locally and / or as a point-like contact with the joining extension of the contact leg of the clamping spring. This is suitably formed by a wave-shaped opening edge of the rail-side joining opening facing the spring-side joining extension. Suitably, the joining extension of the contact leg of the clamping spring sits in the joining opening of the busbar, in particular in a form-fitting and / or force-fitting manner.

[0026] In an advantageous embodiment, a support or clamping bracket, also referred to below as a support extension, is formed on the contact wall of the busbar, with a (bracket) free end directed or guided towards the contact wall of the busbar. In particular, the support bracket is provided on the rail end opposite the insertion opening or on a narrow side or end of the busbar facing away from the insertion opening in the conductor insertion direction. A joint gap is formed between the support bracket or its free end and the contact wall of the busbar, in which the contact leg of the clamping spring is seated and / or clamped in part or with a leg section.

[0027] According to an expedient development, a joining extension is formed on the contact wall of the busbar, in particular at the rail end opposite the insertion opening, which is directed or guided towards the contact wall of the busbar. Suitably, the joining extension has a joining contour that corresponds to a joining element of the support bracket, in particular creating a positive fit or a positive connection. The joining extension can also have a joining contour into which a joining element of the support bracket engages in a positive fit. A joining pin, which is formed, in particular shaped, from the side wall of the busbar, can also be received in the joining opening.Alternatively, a joining pin can be accommodated in the joining opening, which is formed, in particular shaped, from a connection contact (fork or blade contact) that is molded onto the busbar or connected to it, in particular at the rail end opposite the insertion opening.

[0028] This joining concept, which also represents an independent invention, is based on the idea that spaced-apart, opposing rail walls or rail sections of the busbar forming a spring cage should be suitably connected to withstand the spring forces of the clamping spring, particularly those clamped between these rail sections or walls, or to absorb these forces while maintaining the dimensional stability of the busbar. For this purpose, the joining connection can be designed, for example, in the manner of a puzzle piece or dovetail joint, or even a different type of connection with opposing joining contours.

[0029] The joining concept also enables other or additional functions, in particular a suitable hold-down device for the contact leg of the clamping spring and / or a lock functionality, for example to ensure consistent positioning and / or uniform contact forces in contact legs (tulip legs) of a fork contact on a plug contact side of the busbar opposite the conductor insertion opening.

[0030] A suitable further development provides for a positioning extension formed on the busbar, in particular on the side wall, preferably in the area of ​​the (conductor) insertion opening, which extends into the spring arc of the clamping spring, preferably while resting against the spring arc and / or the contact leg. This achieves a particularly advantageous fixation of the position (spring position) or location (position fixation) of the clamping spring within the conductor connection channel.

[0031] According to a particularly suitable embodiment of the electrical connection terminal, an actuating element is provided for pivoting the clamping leg of the clamping spring, preferably in a direction transverse to the conductor insertion direction, oriented relative to the contact leg of the clamping spring, in particular against the spring force of the clamping spring. The actuating element can be actuated, for example, manually or by means of an actuating tool, and is designed accordingly.

[0032] The terminal block suitably comprises a bearing and a counterbearing for supporting the actuating element for a pivoting movement. The counterbearing for the actuating element is formed, for example, in a housing (insulating housing, terminal housing) and / or in the busbar. A rotational axis of the actuating element suitably runs parallel to the contact wall and outside the conductor connection channel, in particular on the side of the contact wall opposite the clamping point, as well as transversely to the conductor insertion direction, in other words, transversely to the insertion direction of the conductor into the connection channel formed by the busbar.

[0033] A suitable variant of an electrical connection terminal for clamping contact with an electrical conductor, which in particular also represents an independent invention, has a busbar with a side wall to which a contact wall and a contact wall spaced therefrom, preferably running parallel, are formed to form a conductor connection channel accessible via an insertion opening. The connection terminal has a clamping spring, arranged in particular in the conductor connection channel, with a contact leg contacted with the contact wall of the busbar and with a clamping leg connected to this via a spring arch and with a clamping edge guided against the contact wall of the busbar to form a clamping point, in particular for clamping contact with the conductor inserted in an insertion direction via the insertion opening into the conductor connection channel between the clamping spring and the busbar.

[0034] In this variant, the electrical terminal has an actuating element for pivoting the clamping leg against the spring force of the clamping spring in the direction of its contact leg. In an advantageous embodiment, the actuating element is pivotally mounted about a rotation axis provided outside the busbar, in particular above the contact wall or on the side thereof facing away from the contact point. The actuating element can be suitably inserted into the conductor connection channel via a cutout in the contact wall of the busbar. The cutout can extend over the entire length of the contact wall in the conductor insertion direction. In other words, the contact wall width can be smaller than the contact wall width.

[0035] The actuating element can expediently be coupled to an actuating section of the clamping leg that extends beyond the clamping edge and / or can be placed against this actuating section. In particular, the actuating element has a preferably rounded end face (actuating edge) that, upon actuation of the actuating element, rests against the actuating section of the clamping leg of the clamping spring, preferably in a sliding or rolling manner.

[0036] In an advantageous embodiment, the actuating element comprises a base body with a bearing pin formed on each side. According to a useful further development, which also constitutes an independent invention, coaxial bearing pins of different axial lengths and / or different pin diameters are formed on the actuating element.

[0037] Suitably, the actuating element has an eccentric section extending radially to the axis of rotation, in particular a keel-like section. Particularly advantageously, the actuating element has a base body with an axial cutout forming a pivoting contour, in particular a rounded or arcuate one. Particularly expediently, the actuating element has a lever section extending radially to the axis of rotation, in particular a lever section that can be manually operated.

[0038] The electrical connection terminal for clamping contact with an electrical conductor according to a further variant, which in particular also represents an independent invention, has a busbar with a side wall, onto which a contact wall and a contact wall spaced therefrom are formed to form a conductor connection channel accessible via an insertion opening. A clamping spring, preferably arranged at least partially in the conductor connection channel, has a contact leg that makes contact with the contact wall of the busbar and a clamping leg connected to this via a spring arch. The clamping leg has a clamping edge that is guided against the contact wall of the busbar to form a clamping point. This serves to clamp the conductor inserted in an insertion direction via the insertion opening into the conductor connection channel between the clamping spring and the busbar.

[0039] In this variant, the electrical connection terminal has a contact (connection contact) provided on the rail end of the busbar opposite the insertion opening, in particular molded onto it. This contact can be a blade contact. Preferably, the (connection) contact is a fork contact with contact legs oriented along the insertion direction and forming a contact point, in particular for a contact pin, which are also referred to below as tulip or fork legs. Suitably, the contact legs have, in the region of their movable leg-free ends, facing curvatures, in particular produced by a bead-like stamping, which form the contact point or between which the contact point is formed.

[0040] According to one embodiment, which in particular also represents an independent invention, the electrical connection terminal has a two-part terminal housing, the housing parts of which are locked to the, preferably U-shaped, busbar.

[0041] The housing parts suitably have joining elements or locking contours corresponding to the busbar. A first housing part accommodating the busbar, in particular with a clamping spring already arranged therein, expediently has a first joining element or a first locking contour, while the contact wall of the busbar has a corresponding locking contour or a corresponding joining element. Particularly advantageously, a second housing part, in particular accommodating a connection contact or the fork contact, has a first joining element or a first locking contour, while the contact wall of the busbar has a corresponding locking contour or a corresponding joining element.

[0042] The terminal housing or its housing parts are preferably made of an insulating material, in particular a plastic. Suitably, the conductor connection channel is closed in a region opposite the side wall of the busbar by a side wall of the terminal or insulating material housing, in particular its first housing part. In other words, a side wall of the terminal or insulating material housing forms a wall that closes the conductor connection channel circumferentially, or the missing side wall of the busbar.

[0043] According to an advantageous embodiment or further development, the terminal housing, in particular its first housing part, has a free area. This area is or will be penetrated by the actuating element, in particular by its eccentric section. In other words, the actuating element, in particular its eccentric section, extends into the free area of ​​the terminal housing and, via this, into the conductor connection channel. Additionally or alternatively, the actuating element actuates the clamping spring or its clamping legs only in an area opposite the side wall of the busbar.

[0044] A suitable embodiment or further development provides that a side wall of the terminal housing and an actuating element form a channel duct that closes the conductor connection channel circumferentially. Preferably, the side wall of the terminal housing and an actuating element, in particular its eccentric section, are aligned with one another, particularly within the scope of manufacturing tolerances.

[0045] In a suitable embodiment or refinement, a side wall of the terminal housing and an actuating element (eccentric section) aligned with the side wall form a channel wall that closes the conductor connection channel circumferentially. Preferably, the terminal housing, in particular its first housing part, has an inlet channel for the conductor. In particular, this channel is funnel-shaped or tapered toward the conductor connection channel.

[0046] Particularly advantageous is the insertion area for the conductor via the entry channel into the conductor connection channel of the terminal block, which is free of edges or other barriers (butt joints), so that the conductor can be guided unhindered to the contact point. A recess for the spring arch or a curved section of the spring arch of the clamping spring is expediently provided in a channel area of ​​the terminal block housing's entry channel that opens into the conductor insertion channel.

[0047] In the following, exemplary embodiments of the invention are explained in more detail with reference to a drawing. In the drawings: Fig. 1 in a side view an electrical connection terminal with a busbar forming a connection channel for an electrical conductor (conductor connection channel) and with a clamping spring accommodated therein, Fig. 2 shows a perspective view of an electrical connection terminal with a busbar forming a connection channel for an electrical conductor (conductor connection channel or tunnel) and with a clamping spring accommodated therein as well as with a fork contact, Fig. 3 in a side view an electrical connection terminal with a busbar forming a connection channel for an electrical conductor (conductor connection channel) and with a clamping spring accommodated therein and with a pivoting lever actuating the clamping spring as an actuating element, Fig. 4 in a perspective view of an electrical connection terminal with a busbar forming a connection channel for an electrical conductor (conductor connection channel) with a view of a side wall with a joining opening and a joining extension of a clamping spring accommodated in the conductor connection channel, Fig. 5 in a perspective view an electrical connection terminal with a busbar and clamping spring accommodated therein with a cutout in one contact leg, Fig. 6 in a side view of an electrical connection terminal with a busbar forming a connection channel for an electrical conductor (conductor connection channel) and with a clamping spring accommodated therein with a spring arch and a positioning extension of the busbar inserted therein, Fig. 7 shows a partial perspective view of an electrical connection terminal with a busbar, with a view of a side wall, with a joining extension seated in a joining opening and with a positioning extension of the busbar seated in a spring arch of a clamping spring, Fig. 8 shows a partial perspective view of an electrical connection terminal with a busbar with the contact limb of the clamping spring seated in a joint gap between a contact wall and a support bracket of the busbar (in a region or section), Fig. 9 shows a partial perspective view of an electrical connection terminal with a busbar with a clamping spring arranged therein, with a cutout in a contact leg and with a corresponding cutout in a contact wall of the busbar, Fig. 10 in a side view an electrical connection terminal with a busbar forming a connection channel for an electrical conductor (conductor connection channel) and with a clamping spring accommodated therein with an actuating section formed therefrom adjacent to a clamping edge of a contact leg, Fig. 11 shows a perspective view of an electrical connection terminal with a busbar with a view of a cutout in a contact wall as access for an actuating element to the clamping leg of a clamping spring arranged, in particular tensioned, between the contact wall and a contact wall of the busbar, Fig. 12 shows a perspective view of an electrical connection terminal according to Fig. 11 with a lever pivoted in contact with an actuating section as an actuating element, Fig. 13 shows a perspective view of a housing of a series arrangement of electrical connection terminals with actuating levers mounted on the housing side so as to be pivotable, Fig. 14 in a sectional view along the line XIV-XIV in Fig. 13 a first variant of a first housing part locked to a contact wall of the busbar and a second housing part locked to a contact wall of the busbar, Fig. 15 in a representation according to Fig. 14 a second variant of a first housing part locked to a contact wall of the busbar and a second housing part locked to a contact wall of the busbar, and Fig. 16a to 16d show a plan view of an actuating lever with bearing pins of different geometries or different dimensions (pin length, pin diameter) formed on both sides of a base body with respect to a rotation axis.

[0048] Corresponding parts are provided with the same reference numerals in all figures.

[0049] The electrical connection terminal 1 shown in the figures allows a (in the Fig. 1 and Fig. 14) to be electrically connected. A conductor is understood here and below to mean, in particular, a (conductor) core of an (electrical) line formed by one or more wires made of electrically conductive material, for example copper, and enclosed by a conductor sheath made of an insulating material.

[0050] For electrical connection, the conductor 2 is clamped by a clamping spring 3. The spring force of the clamping spring 3 clamps the conductor 2. In particular, a free end (spring or leg free end) of the clamping spring 3 forms a clamping edge 4, which penetrates the material of the conductor (its conductor core) 2 and thus significantly increases the pull-out force.

[0051] The connecting terminal 1 has a busbar 5 for electrically contacting the conductor 2. The busbar 5 is advantageously made of a material that has better electrical conductivity than the clamping spring 3. Accordingly, the conductor 2 is electrically connected to the busbar 5. The connecting terminal 1 advantageously has an actuating element 6, preferably in the form of a (pivoting) lever, for actuating the clamping spring 3. The busbar 5 expediently has a further electrical connection, for example a blade contact or a solder connection (not shown) for further electrical connection, or a further connecting terminal for connecting a further conductor. Preferably, as a further electrical connection, a Fig. 2 to 5 as well as 11 and 12 recognizable, fork contact 7 provided.

[0052] The electrical connection terminal provided and designed for clamping contact of an electrical conductor 2 has, according to a Fig. 1, the basic concept comprises the busbar 5 and the clamping spring 3. The busbar has a side wall 5a and a contact wall 5b, as well as a contact wall 5c. The contact wall 5a is formed at an angle, in particular at a right angle, to the side wall 5a. The clamping wall 5c is also bent at an angle, in particular at a right angle, to the side wall 5a. The contact wall 5b and the contact wall 5c are spaced apart from one another or run at least approximately parallel to one another. The busbar 5 is U-shaped, preferably with exactly three walls 5a, 5b, 5c.

[0053] The busbar 5 forms a conductor connection channel or conductor connection tunnel 8, into which the conductor 2 can be inserted into the connection terminal via an insertion opening 9 in an insertion direction E. Particularly advantageously, the contact wall 5b of the busbar 5 also delimits the conductor connection channel (tunnel) 8. As a result, the conductor 2 is also guided through or from the contact wall 5b of the busbar 5 in the rear channel section facing away from the insertion opening 9.

[0054] Particularly in a U-shaped geometry, the busbar 5 has good conductivity or low (electrical) resistance due to the high material content, even with a preferably compact design.

[0055] In an advantageously particularly compact design of the connection terminal 1, the height of the side wall 5a (side wall height of the busbar 5) is less than 2.5 times the width of the contact wall 5c (contact wall width of the busbar 5).

[0056] The width of the contact wall 5c of the busbar 5—relative to the insertion direction E—is in particular between 60% and 75% of the width of the contact wall 5b. The width of the contact wall 5c of the busbar 5 is in particular (50 ± 5)% of the height of the side wall 5a. The width of the contact wall 5b is in particular (70 ± 5)% of the height of the side wall 5a of the busbar 5. The height of the side wall of the busbar is suitably (3 ± 1) mm. This enables the provision of a particularly compact connection terminal.

[0057] The clamping spring 3 has a contact leg 3a and a clamping leg 3b, which is integrally connected or formed (by bending) with the clamping leg 3b via a spring bend 3c. The clamping spring 3 is bent approximately U-shaped. The leg length of the clamping leg 3b of the clamping spring 3 is in particular (70 ± 5)% of the leg length of the contact leg 3a. The leg length of the clamping leg 3b of the clamping spring 3 is preferably (5.5 ± 1.5) mm.

[0058] The clamping leg 3b, which is preferably offset, has the clamping edge 4 on its free end. The clamping spring 3 is accommodated in the conductor connection channel 8 of the busbar 5, preferably clamped between the contact wall 5a and the contact wall 5b. The contact leg 3a of the clamping spring 3 rests mechanically or electrically against the contact wall 5b of the busbar 5.

[0059] The clamping leg 3b of the clamping spring 3 runs within the conductor connection channel to the contact wall 5c of the busbar 5. The clamping leg 3b has a bending point or offset 10 forming a first leg section 10a leading to the spring bend 3c and a second leg section 10a running into the clamping edge 4, which has a greater gradient than the first leg section 10a. The clamping edge 4 at the leg-free end of the clamping leg 3b forms a clamping point K ( Fig. 1 and Fig. 10) for clamping contact of the conductor 2 guided via the insertion opening E into the conductor connection channel 8.

[0060] The spring arch 3c of the clamping spring 3 projects beyond the busbar 5 at the insertion opening. A curved section of the spring arch 3c that transitions into the contact leg 3a projects beyond the contact wall 5b of the busbar 5. It is evident that the spring arch 3c of the clamping spring 3, or a curved section of the spring arch 3c that transitions into the contact leg 3a, projects beyond the contact leg 3a at its underside facing the contact wall 5 of the busbar 5.

[0061] The contact wall 5b of the busbar 5 has a cutout 11 into which the spring arch 3c or the arched section is inserted. The arch apex 3d of the spring arch 3c of the clamping spring 3 projects beyond the side wall 5a and, in the illustrated embodiment, also beyond the contact wall 5c of the busbar 5 at the insertion opening 9 of the conductor connection channel 8.

[0062] As in connection with Fig. 2, the clamping leg 3b of the clamping spring 3 has an actuating section 12 for actuating the clamping leg 3b by means of the lever 6, which can rotate or pivot about a rotation axis D. The actuating section 12 projects beyond the clamping edge 4 or is located spatially adjacent to it on the edge side facing away from the side wall 5a of the busbar 5. Relative to the rotation axis D of the lever 6, the actuating section 12 projects axially beyond the clamping edge 4. The suitably arcuate actuating section 12 is oriented toward the contact leg 3a.

[0063] The busbar 5 has a cutout 13 in its contact wall 5c, through which the actuating section 12 is accessible. The lever 6 can thus be pivoted via the rail-side cutout 13 and spatially adjacent to the contact edge 4 of the contact leg 3b into contact with the actuating section 12 of the clamping leg 3b in order to pivot the clamping leg 3b against the spring force of the clamping spring 3 in the direction of the contact leg 3a. For this purpose, the lever 6 suitably has an eccentric section 6b formed on a base body 6a, extending radially to the rotation axis D, and having a rounded or arcuate end face 14. When the lever 6 is actuated to tension the clamping spring 3 or to open the conductor clamping point K formed between the clamping edge 4 and the underside of the contact wall 5c of the busbar 5 facing the contact wall 5b, the latter slides against the actuating section 12 of the clamping leg 3b.The lever 6 has a manually operable lever section 6c extending radially to the rotation axis D.

[0064] As in connection with the Fig. 3 and Fig. 4 and 12, a bearing pin 15 is formed on both sides of the base body 6a of the lever 6. The lever 6 or its base body 6a has a free cut or a stepped recess 16 and a rounded or arcuate pivot contour 17 ( Fig. 12). A quasi-disk-shaped eccentric section 6b of the lever 6 is formed or provided by the stepped recess 16. Only with this eccentric section 6b does the lever 6 rest against the clamping leg 3b or the actuating section 12 of the clamping spring 3 in order to tension it.

[0065] Fig. 3 shows the lever 6 in a so-called over-dead center position. In this state, the lever 6 is no longer held in the position shown, for example, in Fig. 2. Clamping point K therefore remains open until lever 6 is moved (manually) out of the over-center position.

[0066] When tensioning the clamping spring 3, only the eccentric section 6b of the lever 6 presses on the clamping leg 3b. Due to the resulting one-sided loading of the lever 6 or asymmetrical force transmission, the bearing pins 15 are advantageously designed geometrically ( Fig. 16a to 16d). In this position or setting, in which the clamping point K is practically completely open, the clamping leg 3b touches the contact leg 3a. In other words, in this position or setting of the clamping leg 3c, there is practically no gap or only a small gap or distance between the latter and the contact leg 3a, at least in places. This gap is preferably less than half the diameter d of the spring arc 3c. The diameter d of the spring arc 3c of the clamping spring 3 is between 0.5 mm and 1.5 mm.

[0067] As in connection with the Fig. 3, Fig. 5 and Fig. 6 as well as 8 and 9, the contact leg 3a of the clamping spring 3 has a cutout 18, hereinafter also referred to as a spring cutout, as a local recess. Particularly advantageously, a cutout 19, hereinafter referred to as a rail cutout, is also provided as a local recess in the contact wall 5b of the busbar 5. The rail cutout 19 overlaps the spring cutout 18 ( Fig. 9).

[0068] As from Fig. 3, the position of the spring cutout 18 is adapted to the position of the contact leg 3b of the clamping spring 3, which is deflected or pivoted against the contact leg 3a, so that when the clamping spring 3 is tensioned and the clamping leg 3b is pivoted, its actuating section 12 dips into the spring cutout 18 or into the latter and the rail cutout 19. This enables a particularly compact design of the basic structure of the connection terminal 1, formed from the busbar 5 and the contact spring 3.

[0069] The Fig. 4 to 12 show—again based on the basic structure of the electrical connection terminal 1 formed by the busbar 5 and the contact spring 3—embodiments with, in particular, positive-locking joints provided between the clamping spring 3 and the busbar 5. The respective, in particular positive-locking, connection is formed from the material of the clamping spring 3 and that of the busbar 5 itself.

[0070] Fig. Figure 4 shows an embodiment of the electrical connection terminal 1, in which a joining extension 20 oriented transversely to the conductor insertion direction 8 or—relative to the rotation axis D—axially is formed on the contact leg 3a of the clamping spring 3. A (corresponding) joining opening 21 is formed in the busbar 5, in which the clamping spring-side joining extension 20 is received. The rail-side joining opening 21 is formed in a bending section 22 between the side wall 5a and the contact wall 5b.

[0071] As in Fig. As can be seen comparatively clearly in Figure 7, a joining opening 21 with a constriction 23 is provided in the busbar 5, forming a local, in particular point-like, contact with the joining extension 20 of the contact leg 3a of the clamping spring 3. The constriction 23 is formed by a wave crest of a wave-shaped opening edge 21a of the rail-side joining opening 21 facing the joining extension 20.

[0072] As can be seen from the Fig. As can be seen comparatively clearly in Figures 8 to 10, a support or clamping bracket 24 is provided on the contact wall 5c of the busbar. This is formed onto the contact wall 5b on the narrow side facing away from the insertion opening 9 in the (conductor) insertion direction E or in the region of the end face of the busbar 5 opposite the insertion opening E, or is formed therefrom, in particular by stamping and bending. The support or clamping bracket 24 is suitably bent to run parallel to the side wall 5a. Suitably, the width of the support or clamping bracket 24 running in the insertion direction E in the region of its narrow bracket section is approximately (10 ± 1)% of the width of the busbar 5.

[0073] A joint gap 25 is formed between the support bracket 24 or its free end and the contact wall 5b of the busbar 5. The contact leg 3a of the clamping spring 3 is seated in this gap, preferably in a form-fitting and / or clamp-fixed manner, in some areas or with a rail or leg section 26.

[0074] According to one embodiment of the connecting terminal 1, a bracket-like joining extension 27 is formed on the contact wall 5b of the busbar 5, directed or guided toward its contact wall 5c. This extension is located at the rail end opposite the insertion opening 9, in particular directly adjacent to or resting against the support or clamping bracket 24. The joining extension 27 has a joining contour 28, into which a joining element 29 of the support bracket 24 engages in a form-fitting manner. The joining connection shown is designed like a puzzle piece connection.

[0075] The joining extension 27 has a joining opening 30 into which a joining pin 31 is received, which is formed or shaped from the side wall 5a of the busbar 5 or from a fork leg 7a of the fork contact 7. The joining concept allows the spring forces of the clamping spring 3 clamped in the busbar 5 between its rail sections or walls 5b, 5c to be absorbed while maintaining the dimensional stability of the busbar 5. Consistent positioning and / or uniform contact forces in the fork contact 7 can also be ensured.

[0076] As can be seen in particular from the Fig. 6, Fig. 7 and Fig. As can be seen in Figure 10, a positioning extension 32 is formed on the busbar 5 or on its side wall 5a in the region of the (conductor) insertion opening 9. This extends into the spring arch 3c of the clamping spring 3, preferably while resting against the spring arch 3c and / or the contact leg 3a. This achieves advantageous positional fixation or spring positioning of the clamping spring 3 within the conductor connection channel 8 or in the busbar 5.

[0077] In Fig. Figure 12 shows the electrical terminal block 1 with the fork contact 7 formed integrally on the busbar 5 at the end opposite the insertion opening 9, with mutually inclined contact or fork legs (tulip legs) 7a, 7b. These are oriented along the insertion direction E and form a contact point 33, for example, for a contact pin. For this purpose, the contact legs 7a, 7b have mutually facing (indented) curvatures 34 formed by bead-like stampings in the region of their movable leg-free ends.

[0078] In Fig. 13 shows a housing 35 of a series arrangement of electrical connection terminals with pivoting or actuating levers 6 mounted on the housing side. Fig. 14 and Fig. 15 illustrate variants of a snap-in connection of housing parts 36, 37 of a two-part terminal housing 35 with the busbar 5 of the electrical connection terminal 1.

[0079] The housing 35 has a number of (conductor) insertion channels 38 corresponding to the number of connecting terminals arranged in a row. Of these, only one insertion channel 38 of a first housing part 26 is described in more detail. The first housing part 36 of the terminal housing 35 has a side wall 36a, which closes the conductor connection channel 8 on the circumference or replaces or forms the missing side wall of the busbar 5. The terminal housing 35, in particular its first housing part 36, has a free area 36b for the actuating element 6. The eccentric section 6b of the actuating element 6 extends through the free area 36b and dips into the conductor connection channel 8.

[0080] The housing parts 36, 37 have joining elements 39 or locking contours 40 corresponding to the busbar 5. In the design according to Fig. 14, a first housing part 36, which receives the busbar 5 with the clamping spring 3 already arranged therein, has a housing-side joining element 39a in the form of a latching hook, which engages in a rail-side latching contour (free cut) 40a of the contact wall 5b of the busbar 5. A second housing part 37, which receives the fork contact 7, has a joining element 39b, also designed as a latching hook, which engages in a latching contour (free cut) 40b of the contact wall 5c of the busbar 5.

[0081] When executed according to Fig. 15, a first housing part 36, which accommodates the busbar 5 with the clamping spring 3 already arranged therein, has a housing-side locking contour 41a in the form of a locking recess, into which a rail-side joining element 42a engages in the form of a latch formed from the contact wall 5b of the busbar 5. A second housing part 37, which accommodates the fork contact 7, has a housing-side locking contour 41b in the form of a locking recess, into which a rail-side joining element 42b engages in the form of a latch formed from the contact wall 5c of the busbar 5.

[0082] The input channel 38 of the terminal housing 35 or its first housing part 36, which opens into the conductor insertion channel 8, is funnel-shaped or tapers conically towards the conductor connection channel 8. In a channel region or section 43 of the input channel 38 opening into the conductor insertion channel 8, a recess or cutout 44 is provided in the terminal housing 35 or the first housing part 26, in which the spring arc 3c of the clamping spring 3 lies. The insertion area for the conductor 2 via the input channel 38 into the conductor connection channel 8 of the connection terminal 1 is free of edges or other barriers (butt joints), so that the conductor 2 can be guided unhindered to the contact point K.

[0083] The Fig. 16a to 16d show variants of the lever 6 with mutually coaxial bearing pins 15 of different axial lengths or different pin diameters. The bearing pin facing or associated with the side wall 5a of the busbar 5 is designated hereinafter by 15b, and the bearing pin facing or associated with the cutout 11 of the contact wall 5c of the busbar 5, on the cutout side, is designated hereinafter by 15a.

[0084] In the Fig. 16c and Fig. In the variants shown in Figure 16d, the bearing journals 15a and 15b have different axial lengths. Fig. 16c and Fig. In the variants shown in Figure 16d, the bearing pins 15a and 15b have different pin diameters. The variants of the levers 6 shown in the figures with unequal bearing pins 15a, 15b are particularly suitable for a series arrangement with connectors formed from electrical connection terminals 1 with a 2.5 mm pitch.

[0085] The design of the bearing journals 15a, 15b counteracts asymmetrical loading due to one-sided loading of the lever 6 when tensioning the clamping spring 3, particularly in confined spaces within the overall structure and / or grid dimensions. Due to the different geometries (length, diameter) of the bearing journals 15a, 15b, they only have to absorb the load at the required points. In particular, the opposite bearing journal 15a, 15b can be designed smaller or narrower than the more heavily loaded bearing journal 15b or 15a. This enables corresponding material savings for the less loaded bearing journal 15.

[0086] In summary, the invention relates to an electrical connection terminal 1 provided for clamping contact with an electrical conductor 2 according to a basic concept in which the electrical connection terminal 1 has a busbar 5 with a side wall 5a, onto which a contact wall 5b and a contact wall 5c spaced therefrom are formed to form a conductor connection channel 8 accessible via an insertion opening 9. The connection terminal 1 also has a clamping spring 3, which is braced in particular in the busbar 5, with a contact leg 3a contacting or abutting the contact wall 5b of the busbar 5 and with a clamping leg 3b connected to this spring and having a clamping edge 4 which is guided against the contact wall 5c of the busbar 5 to form a clamping point K.

[0087] The invention also relates to an electrical connection terminal 1 provided for clamping contact with an electrical conductor according to a variant which, in addition to or building on the basic concept, has an actuating element 6, in particular a lever, for pivoting the clamping leg 3b against the spring force of the clamping spring 3 in the direction of its contact leg 3a.

[0088] The invention also relates to an electrical connection terminal 1 provided for clamping contact with an electrical conductor according to a variant which, in addition to or building on the basic concept, has a connection contact 7 provided on the rail end of the busbar 5 opposite the insertion opening 9, in particular formed thereon.

[0089] The invention also relates to an electrical connection terminal 1 provided for clamping contact with an electrical conductor according to a variant which, in addition to or building on the basic concept, has a two-part terminal housing 35, the housing parts 36, 37 of which are preferably latched to the busbar 5.

[0090] The claimed invention is not limited to the exemplary embodiments described above. Rather, other variants of the invention can also be derived therefrom by those skilled in the art within the scope of the disclosed claims without departing from the subject matter of the claimed invention. In particular, all individual features described in connection with the various exemplary embodiments can also be combined in other ways within the scope of the disclosed claims without departing from the subject matter of the claimed invention. List of reference symbols 1 electrical connection terminal 2 (electrical) conductors 3 clamping spring 3a Investment leg 3b clamping leg 3c spring arch 3d arch vertex 4 clamping edge 5 Busbar 5a Side wall 5b system wall 5c Contact wall 6 Actuating element / pivot lever 6a Basic body 6b Eccentric section 6c Lever section 7 Fork contact 7a Contact / fork leg 7b Contact / fork leg 8 conductor connection channel / tunnel 9 Insertion opening 10 Bending point / offset 11 free cut 12 Operating section 13 free cut 14 Front side 15 bearing journals 15a wall-side bearing journal 15b free-cut side bearing journal 16 Free cut / recess 17 Swivel contour 18 spring / free cut 19 Rail / clearance cut 20 Joining process 21 Joint opening 22 Bending section 23 bottleneck 24 support / clamp brackets 25 Joint gap 26 rail / leg section 27 Joint process 28 Joining contour 29 Joining element 30 joining opening 31 joining pins 32 Positioning extension 33 Contact point 34 Embossing / Curvature 35 terminal / housing 36 (first) housing part 36a side wall 36b Open area 37 (second) housing part 38 (Conductor) insertion channel 39a housing-side joining element 39b housing-side joining element 40a rail-side locking contour 40b rail-side locking contour 41a housing-side locking contour 41b housing-side locking contour 42a rail-side joining element 42b rail-side joining element 43 Canal area / section 44 recess d (spring arch) diameter E (Conductor) insertion direction K Terminal point QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2016 111 627 A1

[0002] DE 10 2015 017 151 A1

[0003]

Claims

[1] Electrical connection terminal (1) for clamping contact with an electrical conductor (2), comprising - a busbar (5) with a side wall (5a) and a contact wall (5b) formed thereon to form a conductor connection channel (8) accessible via an insertion opening (9) and a contact wall (5c) spaced therefrom, and - a clamping spring (3), in particular arranged at least partially in the conductor connection channel (8), with a contact leg (3a) in contact with or in contact with the contact wall (5b) of the busbar (5) and with a clamping leg (3b), in particular connected to this via a spring arch (3c), with a clamping edge (4) which is guided between the clamping spring (3) and the busbar (5) against the contact wall (5c) of the busbar (5) to form a clamping point (K) for clamping contact with the conductor (2) introduced in a conductor insertion direction (E) via the insertion opening (9) into the conductor connection channel (8). [2] Electrical connection terminal (1) according to claim 1, characterized by , - that the leg length of the contact leg (3a) of the clamping spring (3) is greater than the leg length of the clamping leg (3b), and / or - that the leg length of the clamping leg (3b) of the clamping spring (3) is between 50% and 90%, in particular between 55% and 85%, preferably between 60% and 80%, particularly preferably (70 ± 5)% of the leg length of the contact leg (3a), and / or - that the clamping leg (3b) of the clamping spring (3) touches the contact leg (3a) in a position with the clamping point (K) open or that a gap or distance, in particular smaller than the diameter (d), preferably smaller than half the diameter (d) of the spring arch (3c) of the clamping spring (3), is formed between the latter and the clamping leg (3b). [3] Electrical connection terminal (1) according to claim 1 or 2, characterized by , - that the side wall (5a) as well as the contact wall (5b) and the contact wall (5c) of the busbar (5) form a U-shape, and / or - that the height of the side wall (5a) is less than 2.5 times the width of the contact wall (5c), and / or - that the width of the contact wall (5c) of the busbar (5) is between 40% and 60%, in particular (50 ± 5), % of the height of the side wall (5a), and / or - that the width of the contact wall (5c) of the busbar (5) is between 50% and 80%, in particular (70 ± 5)% of the height of the side wall (5a). [4] Electrical connection terminal (1) according to one of claims 1 to 3, characterized by , - that the spring arch (3c) of the clamping spring (3) projects beyond the busbar (5) at the insertion opening (9) of the conductor connection channel (8), and / or - that the spring arch (3c) of the clamping spring (3) projects beyond the contact wall (5b) and / or the side wall (5a) and / or the contact wall (5c) at the insertion opening (9) of the conductor connection channel (8) of the busbar (5), and / or - that the spring arch (3c) of the clamping spring (3), in particular an arc section of the spring arch (3c) adjacent to the contact leg (3a) or merging into the contact leg (3a), projects beyond the contact leg (3a) on its side opposite the clamping leg (3b). [5] Electrical connection terminal (1) according to one of claims 1 to 4, characterized by that the clamping leg (3b) of the clamping spring (3) has an actuating section (12) projecting beyond the clamping edge (4) in the conductor insertion direction (E) and / or in a direction transverse to the conductor insertion direction (E). [6] Electrical connection terminal (1) according to claim 5, characterized by , - that the actuating section (12) is oriented towards the contact leg (3a) of the clamping spring (3), and / or - that the actuating section (12) is bent, in particular in an arc shape, towards the contact leg (3a) of the clamping spring (3). [7] Electrical connection terminal (1) according to one of claims 1 to 6, characterized by , - that the contact wall (5c) of the busbar (5) has a smaller width than the contact wall (5b), and / or - that the width of the contact wall (5c) is between 50% and 80%, in particular between 60% and 75%, of the width of the contact wall (5b), and / or - that the contact wall (5c) of the busbar (5) has a cutout (11) via which the actuating section (12) of the clamping leg (3b) of the clamping spring (3) is accessible in a transverse direction to the conductor insertion direction (E) or in the direction of or perpendicular to the clamping edge (4). [8] Electrical connection terminal (1) according to one of claims 1 to 7, characterized by , - that a recess or a spring cutout (18) is made in the contact leg (3a) of the clamping spring (3), and / or - that a recess or a rail cutout (19) is made in the contact wall (5b) of the conductor rail (5), and / or - that a recess or a rail cutout (19) is made in the contact wall (3a) of the busbar (5), which is aligned with the or a recess (18) in the contact leg (3a) of the clamping spring (3) or overlaps therewith, in particular completely or at least partially. [9] Electrical connection terminal (1) according to one of claims 1 to 8, characterized by , - that a joining extension (20) is formed on the contact leg (3a) of the clamping spring (3), and / or - that a joining opening (21) is provided in the busbar (5), in particular in a bending area or bending section (22) between the side wall (5a) and the contact wall (5b), and / or - that a joining opening (21) with a constriction (23), in particular a local one and / or a point-like one, is provided in the busbar (5), and / or - that the joining extension (20) of the contact leg (3a) of the clamping spring (3) is inserted into the joining opening (21) of the busbar (5), in particular in a form-fitting and / or force-fitting manner. [10] Electrical connection terminal (1) according to one of claims 1 to 9, characterized bythat a support bracket (24) with a bracket-free end directed or guided towards the contact wall (5b) of the busbar (5) is formed on the contact wall (5c) of the busbar (5), in particular at the rail end opposite the insertion opening (9), wherein a joining gap (25) is formed between the support bracket (24) or its bracket-free end and the contact wall (5b) of the busbar (5), in which gap the contact leg (3a) of the clamping spring (3) is seated, in particular in some areas. [11] Electrical connection terminal (1) according to one of claims 1 to 10, characterized by that a joining extension (27) directed or guided towards the contact wall (5c) of the busbar (5) is formed on the contact wall (5b) of the busbar (5), in particular at the rail end opposite the insertion opening (9). [12] Electrical connection terminal (1) according to claim 11, characterized by , - that the joining extension (27) has a joining contour (28) which corresponds to a joining element (29) of the support bracket (24), in particular by producing a positive fit or a positive connection, and / or - that the joining extension (27) has a joining contour (28) into which a joining element (29) of the support bracket (24) engages in a form-fitting manner, and / or - that the joining extension (27) has a joining opening (30) into which a joining pin (31) is received, which is formed, in particular shaped, from the side wall (5a), in particular at the rail end opposite the insertion opening (9), of the busbar (5), or - that the joining extension (27) has a joining opening (30) into which a joining pin (31) is received, which is formed from a connection contact (7), in particular a fork contact or fork contact leg (7a), which is provided on the busbar (5) and in particular is formed thereon, in particular at the rail end opposite the insertion opening (9). [13] Electrical connection terminal (1) according to one of claims 1 to 12, characterized by that a positioning extension (32) is formed on the side wall (5a) of the busbar (5), in particular in the region of the insertion opening (9), which projects into the spring arch (3c) of the clamping spring (3), preferably while resting on the spring arch (3c) and / or on the contact leg (3a). [14] Electrical connection terminal (1) for clamping contact with an electrical conductor (2), comprising - a busbar (5) with a side wall (5a) and a contact wall (5b) formed thereon to form a conductor connection channel (8) accessible via an insertion opening (9) and a contact wall (5c) spaced therefrom, - a clamping spring (3), in particular arranged at least partially in the conductor connection channel (8), with a contact leg (3a) contacted or resting on the contact wall (5b) of the busbar (5) and with a clamping leg (3b), in particular connected to this via a spring arch (3c), with a clamping edge (4) guided against the contact wall (5c) of the busbar (5) to form a clamping point (K) for clamping contact of the conductor (2) inserted in an insertion direction (E) via the insertion opening (9) into the conductor connection channel (8) between the clamping spring (3) and the busbar (5), and - an actuating element (6) for pivoting the clamping leg (3b) of the clamping spring (3) in the direction of its contact leg (3a). [15] Electrical connection terminal (1) according to claim 14, characterized by , - that the actuating element (6) is pivotally mounted about a rotation axis (D) outside the busbar (5), in particular outside and / or on the side of the contact wall (5c) opposite the contact point (K), and / or - that the actuating element (6) can be introduced into the conductor connection channel (8) via a cutout (11) or laterally next to the contact wall (5c) of the busbar (5), and / or - that the actuating element (6), in particular with a preferably rounded end face (14), can be placed on and / or coupled to an actuating section (12) of the clamping leg (3b) of the clamping spring (3) projecting beyond the clamping edge (4). [16] Electrical connection terminal (1) according to claim 14 or 15, characterized by , - that the actuating element (6) has a base body (6a) with coaxial bearing pins (15) formed on both sides, and / or - that coaxial bearing journals (15a, 15b) of different axial lengths and / or different journal diameters are formed on the actuating element (6), and / or - that the actuating element (6) has an eccentric section (6b) extending radially to the axis of rotation (D), in particular in the form of a keel blade, and / or - that the actuating element (6) has a base body (6a) with an axial cutout (16) forming a pivoting contour (17), and / or - that the actuating element (6) has a lever section (6c) extending radially to the axis of rotation (D). [17] Electrical connection terminal (1) for clamping contact with an electrical conductor (2) by means of a clamping spring (3), comprising an actuating element (6) for moving the clamping spring (3), - wherein the actuating element (6) has a base body (6a) with, in particular, two-sidedly formed, preferably coaxial, bearing pins (15), and / or - wherein bearing journals (15a, 15b) of different axial lengths and / or different journal diameters are formed on the actuating element (6), in particular coaxial to one another, and / or - wherein the actuating element (6) has an eccentric section (6b) extending radially to the axis of rotation (D), in particular in the form of a keel blade, and / or - wherein the actuating element (6) has a base body (6a) with an axial cutout (16). [18] Electrical connection terminal (1) for clamping contact with an electrical conductor (2), comprising - a busbar (5) with a side wall (5a) and a contact wall (5b) formed thereon to form a conductor connection channel (8) accessible via an insertion opening (9) and a contact wall (5c) spaced therefrom, - a clamping spring (3), in particular arranged at least partially in the conductor connection channel (8), with a contact leg (3a) contacted or resting on the contact wall (5b) of the busbar (5) and with a clamping leg (3b), in particular connected to this via a spring arch (3c), with a clamping edge (4) guided against the contact wall (5c) of the busbar (5) to form a clamping point (K) for clamping contact of the conductor (2) inserted in an insertion direction (E) via the insertion opening (9) into the conductor connection channel (8) between the clamping spring (3) and the busbar (5), and - a connecting contact (7), preferably a fork contact, provided on the rail end of the busbar (5) opposite the insertion opening (9), in particular formed thereon, with contact legs (7a, 7b) oriented in the insertion direction (E) and forming a contact point (33). [19] Electrical connection terminal (1) for clamping contact with an electrical conductor (2), in particular according to one of the preceding claims, comprising - a busbar (5) with a side wall (5a) and a contact wall (5b) formed thereon to form a conductor connection channel (8) accessible via an insertion opening (9) and a contact wall (5c) spaced therefrom, - a clamping spring (3), in particular arranged at least partially in the conductor connection channel (8), with a contact leg (3a) contacted or resting on the contact wall (5b) of the busbar (5) and with a clamping leg (3b), in particular connected to this via a spring arch (3c), with a clamping edge (4) guided against the contact wall (5c) of the busbar (5) to form a clamping point (K) for clamping contact of the conductor (2) inserted in an insertion direction (E) via the insertion opening (9) into the conductor connection channel (8) between the clamping spring (3) and the busbar (5), and - a two-part terminal housing (35), the housing parts (36, 37) of which are joined, preferably locked, in particular to the busbar (5). [20] Electrical connection terminal (1) according to claim 19, characterized by , - that the housing parts (36, 37) have joining elements (39a, 39b) or locking contours (40a, 40b) corresponding to the busbar (5), and / or - that a first housing part (36) receiving the busbar (5) and the clamping spring (3) has a first joining element (39a) or a first locking contour (41a) and the contact wall (5b) of the busbar (5) has a corresponding locking contour (40a) or a corresponding joining element (42a), and / or - that a second housing part (37), in particular for receiving a connection contact (7), has a first joining element (39b) or a first locking contour (41b) and the contact wall (5c) of the busbar (5) has a corresponding locking contour (40b) or a corresponding joining element (42b). [21] Electrical terminal according to claim 19 or 20, characterized by , - that the conductor connection channel (8) is closed in a region opposite the side wall (5a) of the busbar (5) by means of a side wall (36a) of the terminal housing (35), in particular its first housing part (36), and / or - that the terminal housing (35), in particular its first housing part (36), has a free area (36b) through which an actuating element (6), in particular an eccentric section (6b), passes for actuating the clamping spring (3) or into which the actuating element (6), in particular its eccentric section (6b), is inserted, and / or - that an actuating element (6) actuates the clamping spring (3) or its clamping leg (3b) only in an area opposite the side wall (5a) of the busbar (5), and / or - that a side wall (36a) of the terminal housing (35) and an actuating element (6), in particular an eccentric section (6b), form a channel wind that closes the conductor connection channel (8) on the circumference, and / or - that a side wall (36a) of the terminal housing (35) and an actuating element (6) aligned with the side wall (36a), in particular an eccentric section (6b) aligned with the side wall (36a), form a channel wind closing the conductor connection channel (8) on the circumference, and / or - that the terminal housing (35), in particular its first housing part (36), has a preferably funnel-shaped input channel (43) for the conductor (2), and / or - that the terminal housing (35), in particular its first housing part (36), has an inlet channel (43) for the conductor (2), preferably conically, opening into the conductor insertion channel (8), and / or - that in a channel region (44) of an input channel (43) of the terminal housing (35) opening into the conductor insertion channel (8), a housing-side recess (45) is provided for the or a spring arch (3c) of the clamping spring (3).

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