Electrical connection terminal

Abstract

The invention relates to an electrical connection terminal (1) for clamping contact with an electrical conductor (2), comprising 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), and a clamping spring (3) with a contact leg (3a) contacted to the contact wall (5b) of the busbar (5) and with a clamping leg (3b) connected to the latter and having a clamping edge (4) which is guided against the contact wall (5c) of the busbar (5) to form a clamping point (K).

Description

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

[0002] In a conductor connection terminal known from DE 10 2016 111 627 A1, comprising a busbar section and a clamping spring, the clamping spring has a clamping leg oriented towards the busbar section to form a clamping point for connecting an electrical conductor, a spring arc adjoining the clamping leg, and a contact leg extending with a vertical section transverse 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] From DE 10 2015 017 151 A1, a conductor connection contact element preferably intended for direct contacting of printed circuit boards is known, 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 entry channel, and with a bottom section and an opposing cover section. A conductor guide area adjacent to a clamping section of the clamping spring, formed on a first side wall of the busbar section, is a section of the first side wall oriented obliquely towards the opposite side wall.

[0004] The invention is based on the objective of providing a particularly suitable electrical terminal block. In particular, a terminal block with the most compact design possible is to be provided.

[0005] This problem is solved according to the invention by 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 dependent claims.

[0006] The electrical terminal block, designed and configured for clamping an electrical conductor, comprises a busbar with a side wall, a mounting wall, and a contact wall. The mounting wall and the contact wall are spaced apart from each other, preferably running parallel to each other. The side wall of the busbar, preferably the only one, is connected to both the mounting wall and the contact wall. The busbar is particularly preferably U-shaped, with the mounting wall and the contact wall forming the legs of the U and the side wall forming the connecting leg to create the U-shape.

[0007] The height of the busbar's side wall 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. Advantageously, the width of the contact wall is between 50% and 80%, particularly between 60% and 75%, of the width of the mounting wall. Preferably, the width of the busbar's contact wall is between 40% and 60%, particularly (50 ± 5)%, of the side wall's height. Suitablely, the width of the busbar's mounting wall is between 50% and 80%, particularly (70 ± 5)%, of the side wall's height.

[0008] The busbar is suitably formed from a sheet metal part, in particular as or in the manner of a stamped-bent part. The busbar particularly expediently forms a spring cage, especially 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 terminal block comprises a clamping spring with a contact leg and a clamping leg. Preferably, the contact leg is connected to the clamping leg of the clamping spring via a spring arc. The clamping spring is preferably bent in an approximately U- or V-shape. The clamping leg has a clamping edge at its free end. Suitablely, the clamping spring is at least partially, sectionally, or in a portion of its length, accommodated within the conductor connection channel of the busbar. In particular, at least the clamping edge of the clamping spring is located within the conductor connection channel or tunnel of the busbar. Preferably, the clamping spring is clamped within the busbar between the contact wall and the mounting surface. The contact leg rests against the contact wall of the busbar, preferably over its entire surface.

[0010] A clamping spring is understood to be exactly one or a number of clamping springs. The clamping spring is suitable for clamping the electrical conductor. Advantageously, the clamping spring is formed and bent from spring steel. Advantageously, the clamping spring 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. Advantageously, the contact leg and the adjoining spring arc, as well as the adjoining clamping leg, are formed in one piece.

[0011] The contact leg of the clamping spring is designed to rest against a fixed area of ​​the terminal block in order to absorb the spring force (restoring force). Preferably, the contact leg rests exclusively against the busbar, in particular against its mounting surface. The connection formed or provided by the clamping spring and the busbar is suitably 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. Preferably, the clamping leg has a bend or offset, forming two leg sections with different slopes. At its free end, the clamping leg has a clamping edge that forms a clamping point for the conductor, which is guided through the insertion opening into the (conductor) connection channel, against the contact wall of the busbar.

[0013] Suitablely, 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%, particularly between 55% and 85%, more preferably between 60% and 80%, and most preferably (70 ± 5)% of the leg length of the contact leg.

[0014] Advantageously, the arc of the clamping spring extends beyond the contact leg on the side opposite the clamping leg. In other words, an arc segment of the spring that adjoins or merges into the contact leg extends beyond the contact leg on its (underside) side opposite the clamping leg.

[0015] According to an advantageous embodiment, the spring arc of the clamping spring projects beyond the busbar at the entry opening. In particular, the spring arc projects beyond the contact wall of the busbar. In other words, an arc segment of the spring arc, which transitions into the contact leg, projects beyond the contact wall of the busbar. Particularly advantageously, the contact wall of the busbar has a relief in which the spring arc, or an arc segment thereof, is located. Additionally or alternatively, the spring arc, or an arc segment thereof, projects beyond the side wall and / or the contact wall of the busbar at the entry opening of the conductor connection channel of the busbar.

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

[0017] According to a suitable embodiment, the actuating section is oriented towards the contact leg of the clamping spring. Preferably, the actuating section is arc-shaped, particularly with its arc end oriented towards the contact leg of the clamping spring. This provides a particularly suitable actuation of the contact leg for deflecting the clamping spring and releasing the contact point, especially for reliably inserting the conductor into the contact point. Furthermore, it is advantageously possible for an actuating element, particularly a pivot lever (hereinafter also referred to as a lever), to be positioned adjacent to (spatially next to) the contact edge of the contact leg or along the contact edge in contact with the actuating section.

[0018] A suitable design of the busbar provides that the contact wall of the busbar has a narrower width than the mounting surface or a relief cut. Due to the relief cut or the narrower wall width of the busbar's contact wall, the actuating section of the clamping spring's leg is accessible 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 allows for a particularly compact terminal design.

[0019] According to an advantageous embodiment, a recess, hereinafter also referred to as a clearance (spring clearance), is provided in the contact leg of the clamping spring. It is particularly advantageous to provide a recess, hereinafter also referred to as a clearance (rail clearance), in the contact wall of the conductor rail. Advantageously, the spring clearance and the rail clearance are aligned. Suitablely, the spring clearance and the rail clearance are at least partially or almost completely overlapping.

[0020] Advantageously, the clearance position of the spring clearance, or the position of the clearance concept formed from the spring clearance and the rail clearance, is adapted to the position of the contact leg of the clamping spring, which is deflected or pivoted against the mounting leg, in such a way that when the clamping spring is tensioned or when the clamping leg is pivoted, its free end, in particular the actuating section of the clamping leg, can enter the spring clearance or both the spring clearance and the rail clearance. This results in a particularly compact design of the basic structure of the terminal block, which consists of the busbar and the contact spring.

[0021] In other words, this free-cut design allows for a particularly low or minimized installation height or wall clearance between the contact wall and the busbar mounting surface. Additionally, or with the same overall height of the conductor connection channel, a correspondingly larger space is advantageously provided within the 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 embodiment of the electrical terminal block, in particular the basic structure of the terminal block formed by the busbar and the contact spring, at least one positive locking or positive locking connection (joining connection) is provided between the clamping spring and the busbar. Suitablely, the at least one positive locking connection is formed from the material of the clamping spring and the busbar itself, i.e., without an additional joining element.

[0023] In the following, a "positive locking" or "positive locking connection" between at least two interconnected parts is understood to mean, in particular, that the cohesion of the interconnected parts, at least in one direction, is achieved through 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 form.

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

[0025] A particularly advantageous feature is the provision of a joining opening with a constriction in the busbar. Specifically, a contact contour is provided that acts only locally and / or as a point contact on the joining extension of the clamping spring's contact leg. This is suitably formed by a wave-like shape on the opening edge of the busbar-side joining opening facing the spring-side joining extension. The joining extension of the clamping spring's contact leg is suitably engaged in the joining opening of the busbar, particularly by a positive and / or force-fit connection.

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

[0027] According to a suitable further development, a joining extension, aligned or guided towards the contact wall of the busbar, is formed on the mounting wall of the busbar, particularly at the end of the busbar opposite the insertion opening. The joining extension appropriately has a joining contour that corresponds to a joining element of the support bracket, in particular by creating a positive fit or a positive-locking connection. Alternatively, the joining extension can have a joining contour into which a joining element of the support bracket engages positively. A joining pin, formed from the side wall of the busbar, can also be received in the joining opening.Alternatively, a joining pin can be included in the joining opening, which is formed, in particular shaped, from a connecting contact (fork or knife contact) that is formed on or connected to the busbar, especially at the end of the rail opposite the insertion opening.

[0028] This joining concept, which also constitutes an independent invention, is based on the idea that opposing rail walls or rail sections forming a spring cage, spaced apart from one another, should be suitablely connected to withstand the spring forces of the clamping spring, particularly those tensioned between these rail sections or walls, or to absorb these forces while maintaining the dimensional stability of the rail. For this purpose, the joining connection can be designed, for example, as a jigsaw puzzle piece or dovetail joint, or even as another type of connection with identical joining contours.

[0029] The joining concept also enables other or additional functions, in particular a suitable hold-down of the clamping spring's contact leg and / or a locking function, 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 that a positioning extension is integrally formed on the busbar, particularly on the side wall, preferably in the area of ​​the (conductor) entry opening, which projects into the spring arc of the clamping spring, preferably bearing against the spring arc and / or the contact leg. This achieves a particularly advantageous fixation of the position (spring position) or orientation (position fixation) of the clamping spring within the conductor connection channel.

[0031] According to a particularly suitable embodiment of the electrical terminal block, an actuating element is provided for pivoting the clamping leg of the clamping spring, preferably in a transverse direction to the conductor insertion direction, oriented towards the contact leg of the clamping spring, and especially 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 has a bearing and a counter bearing for supporting the actuating element for a pivoting movement. The counter bearing for the actuating element is, for example, formed in a housing (insulating housing, terminal housing) and / or in the busbar. A rotation 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, and transversely to the conductor entry direction, in other words, transversely to the direction in which the conductor is inserted into the connection channel formed by the busbar.

[0033] A suitable embodiment of an electrical terminal block, particularly one that also constitutes an independent invention, for clamping an electrical conductor comprises a busbar with a side wall to which a contact wall and a spaced-apart, preferably parallel, contact wall are integrally formed, forming a conductor connection channel accessible via an insertion opening. The terminal block has a clamping spring, particularly arranged in the conductor connection channel, with a contact leg that contacts the contact wall of the busbar and with a clamping leg connected to this leg via a spring arc, the clamping leg having a clamping edge that is guided against the contact wall of the busbar, forming a clamping point. This clamping contact is particularly useful for clamping the conductor, which is inserted into the conductor connection channel via the insertion opening, between the clamping spring and the busbar.

[0034] In this variant, the electrical terminal block has an actuating element for pivoting the clamping arm 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 an axis of rotation provided outside the busbar, in particular above the contact wall or on its side 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 less than the contact wall width.

[0035] Advantageously, the actuating element can be coupled to and / or placed against an actuating section of the clamping leg that projects beyond the clamping edge. In particular, the actuating element has a preferably rounded end face (actuating edge) which, during 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 has a base body with a bearing pin molded onto each side. According to a further expedient embodiment, which also constitutes an independent invention, coaxial bearing pins of different axial lengths and / or different pin diameters are molded onto the actuating element.

[0037] The actuating element suitably has an eccentric section extending radially to the axis of rotation, particularly a keel-shaped section. The actuating element is particularly advantageous to have a base body with an axial relief forming a pivot contour, particularly rounded or arc-shaped. The actuating element is especially expedient to have a lever section extending radially to the axis of rotation, particularly one that can be operated manually.

[0038] The electrical terminal block, which also constitutes an independent invention, for clamping an electrical conductor according to a further embodiment, has a busbar with a side wall to which a contact wall and a spaced-apart contact wall are integrally formed, forming 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 contacts the contact wall of the busbar and a clamping leg connected to it via a spring arc. The clamping leg has a clamping edge that is guided against the contact wall of the busbar, forming a clamping point. This edge serves to clamp the conductor, which is inserted into the conductor connection channel via the insertion opening in an insertion direction, between the clamping spring and the busbar.

[0039] In this variant, the electrical terminal has a contact (connection contact) provided at the end of the busbar opposite the insertion opening, and in particular, integrally formed therein. 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 hereinafter also referred to as tulip or fork legs. Suitablely, the contact legs have mutually facing bulges in the area of ​​their movable leg ends, in particular produced by a bead-like embossing, 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 terminal block 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. Advantageously, a first housing part accommodating the busbar, particularly with a clamping spring already arranged therein, 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 components are preferably made of an insulating material, in particular a plastic. The conductor connection channel is suitably closed in an area opposite the side wall of the busbar by means of a side wall of the terminal or insulating housing, in particular its first housing component. In other words, a side wall of the terminal or insulating 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 clearance area. This clearance area is 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 clearance area of ​​the terminal housing and through it into the conductor connection channel. Additionally or alternatively, the actuating element actuates the clamping spring or its clamping leg 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 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 each other, especially within the limits of manufacturing tolerances.

[0045] In a suitable embodiment or further development, 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 is funnel-shaped or tapered towards the conductor connection channel.

[0046] A particularly advantageous feature is that the conductor entry area via the inlet channel into the conductor connection channel of the terminal block is free of edges or other barriers (impact points), allowing the conductor to be guided unhindered to the contact point. It is expedient to provide a housing-side recess for the spring arc or a section of the spring arc of the clamping spring in a channel section of the inlet channel of the terminal block housing that opens into the conductor entry channel.

[0047] Exemplary embodiments of the invention are explained in more detail below with reference to a drawing. The drawing shows: Fig. 1 in a side view an electrical terminal block with a busbar forming a connection channel for an electrical conductor (conductor connection channel) and with a clamping spring included therein, Fig. 2 in a perspective view an electrical terminal block with a busbar forming a connection channel for an electrical conductor (conductor connection channel or tunnel) and with a clamping spring included therein as well as with a fork contact, Fig. 3 in a side view an electrical terminal block with a busbar forming a connection channel for an electrical conductor (conductor connection channel) and with a clamping spring included therein, as well as with a pivot lever as an actuating element that actuates the clamping spring, Fig. 4 in a perspective view an electrical terminal block with a busbar forming a connection channel for an electrical conductor (conductor connection channel) looking towards a side wall with a joining opening and a joining extension of a clamping spring inserted into the conductor connection channel, Fig. 5 in a perspective view an electrical terminal block with a busbar and clamping spring included therein with a relief cut in one leg, Fig. 6 in a side view an electrical terminal block with a busbar forming a connection channel for an electrical conductor (conductor connection channel) and with a clamping spring with a spring arc and positioning extension of the busbar inserted therein, Fig. 7. Partial view in a perspective representation of an electrical terminal block with a busbar looking towards a side wall with a joining extension seated in a joining opening and with a positioning extension of the busbar seated in a spring arc of a clamping spring. Fig. 8. Partially shown in a perspective view an electrical terminal block with a busbar with a clamping shank of the clamping spring seated (in a section or area) in a joining gap between a system wall and a support bracket of the busbar, Fig. 9. Partially shown in a perspective view, an electrical terminal block with a busbar with a clamping spring arranged therein, with a relief in one leg of the installation and with a corresponding relief in a wall of the busbar. Fig. 10 in a side view an electrical terminal block with a busbar forming a connection channel for an electrical conductor (conductor connection channel) and with a clamping spring received therein with an actuating section formed from this adjacent to a clamping edge of a contact leg, Fig. 11 in a perspective view an electrical terminal block with a busbar looking at a cutaway in a contact wall as access for an actuating element to the clamping leg of a clamping spring, in particular pre-tensioned, located between the contact wall and a mounting wall of the busbar, Fig. 12 in a perspective view an electrical terminal block according to Fig. 11 with a lever pivoted in the system on an actuating section as an actuating element, Fig. 13 in a perspective view a housing of a series arrangement of electrical terminal blocks with actuating levers pivotally mounted on the housing side, Fig. 14 in a sectional view along line XIV-XIV in Fig. 13 a first variant of a first housing part locked to a mounting 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 mounting wall of the current rail and a second housing part locked to a contact wall of the current rail, and Fig. Figures 16a to 16d show an actuating lever with bearing pins of different geometry or dimensions (pin length, pin diameter) formed on both sides of a base body with respect to an axis of rotation.

[0048] Corresponding parts are marked with the same reference symbols in all figures.

[0049] The electrical terminal block 1 shown in the figures makes it possible to connect a (into the Fig. 1 and Fig. to electrically connect conductor 2 as shown in Figure 14. Here and in the following, a conductor is understood to be, in particular, a (conductor) A 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 that penetrates the material of the conductor (its conductor core) 2 and thus significantly increases the pull-out force.

[0051] The terminal block 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 terminal block 1 advantageously has an actuating element 6, preferably in the form of a (swivel) 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 terminal block for connecting another conductor. Preferably, the further electrical connection is a [missing information], particularly in the [missing information]. Fig. 2 to 5 as well as 11 and 12 recognizable, fork contact 7 provided.

[0052] The electrical terminal block, designed and installed for clamping an electrical conductor 2, has, according to a Fig. The basic concept shown in Figure 1 comprises the busbar 5 and the clamping spring 3. The busbar has a side wall 5a, a contact wall 5b, and a contact wall 5c. The contact wall 5a is formed at an angle, particularly at a right angle, to the side wall 5a. The clamping wall 5c is also bent at an angle, particularly at a right angle, to the side wall 5a. The contact wall 5b and the contact wall 5c are spaced apart from each other or run at least approximately parallel to each other. The busbar 5 is U-shaped, preferably with exactly three walls 5a, 5b, and 5c.

[0053] The busbar 5 formed a conductor connection channel or conductor connection tunnel 8, into which the conductor 2 could be inserted via an insertion opening 9 in an insertion direction E into the terminal block. The mounting wall 5b of the busbar 5 also advantageously delimits the conductor connection channel (tunnel) 8. This ensures that the conductor 2 is guided through or away from the mounting wall 5b of the busbar 5 even in the rear section of the channel facing away from the insertion opening 9.

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

[0055] In an advantageously particularly compact design of the terminal block 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 – with respect to the insertion direction E – is in particular between 60% and 75% of the width of the mounting 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 mounting 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 allows for the provision of a particularly compact terminal block.

[0057] The clamping spring 3 has a contact leg 3a and a clamping leg 3b, which is integrally connected (in one piece) to the clamping leg 3b via a spring arc 3c, or formed (by bending). The clamping spring 3 is bent approximately in a U-shape. 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 expediently angled, has the clamping edge 4 at its free end. The clamping spring 3 is received in the conductor connection channel 8 of the busbar 5, preferably clamped between the mounting wall 5a and the contact wall 5b. The mounting leg 3a of the clamping spring 3 is in mechanical and / or electrical contact with the mounting 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 bend or offset 10 forming a first leg section 10a leading to the spring arc 3c and a second leg section 10a extending into the clamping edge 4, which has a steeper slope than the first leg section 10a. The clamping edge 4 at the free end of the clamping leg 3b forms a clamping point K with the contact wall 5c of the busbar 5. Fig. 1 and Fig. 10) for clamping the conductor 2, which is guided through the insertion opening E into the conductor connection channel 8.

[0060] The spring arc 3c of the clamping spring 3 extends beyond the busbar 5 at the insertion opening. A curved section of the spring arc 3c, transitioning into the contact leg 3a, extends beyond the contact wall 5b of the busbar 5. The spring arc 3c of the clamping spring 3, or rather a curved section of the spring arc 3c transitioning into the contact leg 3a, clearly extends beyond the contact leg 3a on its underside facing the contact wall 5 of the busbar 5.

[0061] The mounting wall 5b of the busbar 5 has a clearance 11 in which the spring arc 3c or the arc section is inserted. The apex 3d of the spring arc 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 entry opening 9 of the conductor connection channel 8.

[0062] As in connection with Fig. As is relatively clearly evident in Figure 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 is rotatable or pivotable about a pivot axis D. The actuating section 12 projects beyond the clamping edge 4 or is located spatially next to it on the edge side facing away from the side wall 5a of the busbar 5. With respect to the pivot axis D of the lever 6, the actuating section 12 projects axially beyond the clamping edge 4. The actuating section 12, which is suitably curved, is oriented towards the contact leg 3a.

[0063] The busbar 5 has a clearance 13 in its contact wall 5c, through which the actuating section 12 is accessible. The lever 6 can thus be pivoted over the rail-side clearance 13 and, in this position, spatially adjacent to the contact edge 4 of the contact leg 3b, in 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 towards the contact leg 3a. For this purpose, the lever 6 suitably has an eccentric section 6b, formed on a base body 6a and extending radially to the axis of rotation D, with 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 mounting wall 5b, this lies slidably against the actuating section 12 of the clamping leg 3b.The lever 6 has a manually operable lever section 6c extending radially to the axis of rotation D.

[0064] As in connection with the Fig. 3 and Fig. As can be seen relatively clearly in figures 4 and 12, a bearing pin 15 is integrally formed on both sides of the base body 6a of the lever 6. The lever 6, or rather its base body 6a, has a relief or a stepped recess 16 and a rounded or arcuate pivot contour 17 ( Fig. 12). By means of the stepped recess 16, a quasi-disc-shaped eccentric section 6b of the lever 6 is formed or provided. Only with this eccentric section 6b does the lever 6 rest against the clamping leg 3b or against the actuating section 12 of the clamping spring 3 in order to tension it.

[0065] Fig. Figure 3 shows the lever 6 in a so-called over-center position. In this state, the lever 6 is no longer held in place by the restoring force of the clamping spring 3, for example, in Fig. The lever returns to its initial state as shown in section 2. The clamping point K therefore remains open until the lever 6 is moved (manually) out of the over-center position.

[0066] When the clamping spring 3 is tensioned, only the eccentric section 6b of the lever 6 presses on the clamping leg 3b. Due to the resulting one-sided load on the lever 6 or asymmetrical force transmission, the bearing pins 15 are advantageously designed with a suitable geometry ( Fig. 16a to 16d). In this position, where the clamping point K is practically fully open, the clamping leg 3b contacts the support leg 3a. In other words, in this position of the clamping leg 3c, there is practically no gap or only a small gap or distance between it and the support leg 3a, at least in some 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. As can be seen in Figures 6, 8, and 9, the mounting leg 3a of the clamping spring 3 has a relief 18, hereinafter also referred to as the spring relief, as a local recess. Particularly advantageously, a relief 19, hereinafter referred to as the rail relief, is also provided as a local recess in the mounting wall 5b of the conductor rail 5. The rail relief 19 is overlapping the spring relief 18 ( Fig. 9).

[0068] As from Fig. As can be seen in Figure 3, the clearance position of the spring clearance 18 is adapted to the position of the contact leg 3b of the clamping spring 3, which is deflected or pivoted against the mounting leg 3a, so that when the clamping spring 3 is tensioned and the clamping leg 3b is pivoted, its actuating section 12 enters the spring clearance 18 or both the spring clearance 18 and the rail clearance 19. This enables a particularly compact design of the basic structure of the terminal block 1, which consists of the busbar 5 and the contact spring 3.

[0069] The Fig. Figures 4 to 12 show – again starting from the basic structure of the electrical terminal block 1 formed by the busbar 5 and the contact spring 3 – embodiments with, in particular, positive-locking connections provided between the clamping spring 3 and the busbar 5. The respective connection, in particular the 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 terminal block 1, in which a joining extension 20, oriented transversely to the conductor insertion direction 8 or axially with respect to the axis of rotation D, is formed on the contact leg 3a of the clamping spring 3. A (corresponding) joining opening 21 is provided in the busbar 5, in which the joining extension 20 on the clamping spring side is received. The busbar-side joining opening 21 is provided in a bent section 22 between the side wall 5a and the contact wall 5b.

[0071] As in Fig. As can be seen relatively clearly in Figure 7, a joining opening 21 with a constriction 23 is provided in the conductor rail 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 crest of a wave-shaped opening edge 21a of the rail-side joining opening 21, which faces the joining extension 20.

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

[0073] A gap 25 is formed between the support bracket 24 or its free end and the mounting wall 5b of the conductor rail 5. The mounting shank 3a of the clamping spring 3 is partially seated in this gap, or with a rail or leg section 26, preferably in a form-fitting and / or clamping manner.

[0074] According to one embodiment of the terminal block 1, a bow-shaped joining extension 27, directed towards or guided towards the contact wall 5c of the busbar 5, is integrally formed on the mounting wall 5b of the busbar 5. This extension is located at the end of the busbar opposite the insertion opening 9, in particular directly adjacent to or abutting 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 illustrated joining connection is designed in the manner of 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 from the side wall 5a of the busbar 5 or from a fork leg 7a of the fork contact 7. The joining concept enables the spring forces of the clamping spring 3, which is 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 particularly 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 area of ​​the (conductor) insertion opening 9. This extension projects into the spring arc 3c of the clamping spring 3, preferably bearing against the spring arc 3c and / or the bearing leg 3a. This achieves an advantageous fixed position 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 connection terminal 1 with the fork contact 7 molded onto the end of the busbar 5 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 (inward) bulges 34 formed by bead-like indentations in the area of ​​their movable leg ends.

[0078] In Fig. Figure 13 shows a housing 35 of a series arrangement of electrical connection terminals with pivot or actuating levers 6 mounted on the housing side for pivot movement. Fig. 14 and Fig. Figure 15 illustrates variants of a snap-fit ​​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 entry channels 38 corresponding to the number of terminals connected in series. Only one entry 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 entry channel 8 circumferentially 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 clearance area 36b for the actuating element 6. The eccentric section 6b of the actuating element 6 extends through the clearance area 36b and enters the conductor entry channel 8.

[0080] The housing parts 36, 37 have joining elements 39 or snap-in 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 a clamping spring 3 already arranged therein, has a housing-side joining element 39a in the form of a snap hook, which engages in a busbar-side snap contour (relief cut) 40a of the mounting 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 snap hook, which engages in a snap contour (relief cut) 40b of the contact wall 5c of the busbar 5.

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

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

[0083] The Fig. Figures 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 subsequently designated 15b, and the bearing pin facing or associated with the relief 11 of the contact wall 5c of the busbar 5, on the relief side, is subsequently designated 15a.

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

[0085] The design of the bearing journals 15a, 15b counteracts asymmetrical loading resulting from one-sided stress on the lever 6 when tensioning the clamping spring 3, particularly in confined spaces within the overall assembly and / or with limited grid spacing. Due to the different geometries (length, diameter) of the bearing journals 15a, 15b, they only need to bear the load at the required points. In particular, the opposite bearing journal 15a, 15b can be made smaller or narrower than the more heavily loaded bearing journal 15b or 15a. This allows for a corresponding reduction in material on the less heavily loaded bearing journal 15.

[0086] In summary, the invention relates to an electrical terminal 1 designed for clamping an electrical conductor 2, according to a basic concept in which the electrical terminal 1 has a busbar 5 with a side wall 5a, to which a contact wall 5b and a spaced-apart contact wall 5c are integrally formed, forming a conductor connection channel 8 accessible via an insertion opening 9. The terminal 1 also has a clamping spring 3, which is in particular clamped in the busbar 5, with a contact leg 3a that contacts or rests against the contact wall 5b of the busbar 5 and with a clamping leg 3b connected to it, having a clamping edge 4 that is guided against the contact wall 5c of the busbar 5, forming a clamping point K.

[0087] The invention also relates to an electrical terminal 1 provided for clamping an electrical conductor according to a variant which, in addition to or based 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 terminal 1 provided for clamping an electrical conductor according to a variant which, in addition to or based on the basic concept, has a connection contact 7 provided at the end of the busbar 5 opposite the insertion opening 9, in particular formed on it.

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

[0090] The claimed invention is not limited to the embodiments described above. Rather, other variants of the invention can also be derived by a person 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 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. Reference symbol list 1 electrical terminal block 2 (electrical) conductors 3 clamping springs 3a Attachment leg 3b Clamping leg 3c Feather bow 3D arc vertex 4 clamping edge 5 busbar 5a Side wall 5b System wall 5c Contact wall 6 Actuating element / swivel 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 / cranking 11. Clearing 12 Actuation section 13 Clearing 14 Front 15 bearing journals 15a wall-side bearing pin 15b free-cut bearing pin 16. Cutout / recess 17 Swivel contour 18 Spring / Freecut 19 Rail / Freecut 20 Addition process 21 Joining opening 22 bending section 23 Narrow point 24 support / clamping brackets 25 Joining gap 26 Rail / leg section 27 Addition process 28 Joining contour 29 Joining element 30 Joining opening 31 connecting pins 32 Positioning process 33 Contact point 34 Embossing / Curving 35 terminals / housings 36 (first) housing part 36a Side wall 36b Free 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 Exclusion d (bow) diameter E (conductor) insertion direction K clamping point QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts 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 terminal block (1) for clamping an electrical conductor (2), comprising - a busbar (5) with a side wall (5a) and, forming a conductor connection channel (8) accessible via an insertion opening (9), a system wall (5b) and a contact wall (5c) spaced apart from it, formed on the side wall (5a) and a conductor connection channel (8) accessible via an insertion opening (9), and - a clamping spring (3), in particular at least partially arranged in the conductor connection channel (8), with a clamping leg (3a) contacting or bearing against the mounting wall (5b) of the busbar (5) and with a clamping leg (3b) connected to this, in particular via a spring arc (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 of the conductor (2) inserted in a conductor insertion direction (E) via the insertion opening (9) into the conductor connection channel (8). [2] Electrical terminal block (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) in a position with the clamping point (K) open touches the support leg (3a) or that a gap or distance is formed between it and the clamping leg (3b), in particular smaller than the diameter (d), preferably smaller than half the diameter (d) of the spring arc (3c) of the clamping spring (3). [3] Electrical terminal block (1) according to claim 1 or 2, characterized by , - that the side wall (5a), the mounting 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 mounting 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 terminal block (1) according to one of claims 1 to 3, characterized by , - that the spring arc (3c) of the clamping spring (3) protrudes beyond the busbar (5) at the insertion opening (9) of the conductor connection channel (8), and / or - that the spring arc (3c) of the clamping spring (3) projects beyond the mounting 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 arc (3c) of the clamping spring (3), in particular an arc section of the spring arc (3c) adjacent to or transitioning into the mounting leg (3a), projects beyond the mounting leg (3a) on the side opposite the clamping leg (3b). [5] Electrical terminal block (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 transverse direction to the conductor insertion direction (E). [6] Electrical terminal block (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), in particular in an arc shape, is bent towards the contact leg (3a) of the clamping spring (3). [7] Electrical terminal block (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 installation 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 mounting wall (5b), and / or - that the contact wall (5c) of the busbar (5) has a clearance (11) through 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 terminal block (1) according to any one of claims 1 to 7, characterized by , - that a recess or spring relief (18) is provided in the mounting leg (3a) of the clamping spring (3), and / or - that a recess or rail clearance (19) is provided in the wall (5b) of the conductor rail (5), and / or - that a recess or rail clearance (19) is provided in the mounting wall (3a) of the conductor rail (5) which is aligned with or overlaps with the or a recess (18) in the mounting leg (3a) of the clamping spring (3), in particular completely or at least partially. [9] Electrical terminal block (1) according to any one of claims 1 to 8, characterized by , - that a joining extension (20) is formed on the mounting 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 mounting wall (5b), and / or - that a joining opening (21) with a constriction (23), in particular local and / or point-like, is provided in the conductor rail (5), and / or - that the joining extension (20) of the mounting leg (3a) of the clamping spring (3) is inserted into the joining opening (21) of the busbar (5), in particular in a form-fit and / or force-fit manner. [10] Electrical terminal block (1) according to any one of claims 1 to 9, characterized by, that a support bracket (24) with a bracket free end directed or guided towards the contact wall (5b) of the busbar (5), in particular at the end of the busbar opposite the insertion opening (9), is formed on the contact wall (5c) of the busbar (5), 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 the contact leg (3a) of the clamping spring (3) is seated, in particular in certain areas. [11] Electrical terminal block (1) according to any 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 system wall (5b) of the busbar (5), in particular at the end of the busbar opposite the insertion opening (9). [12] Electrical terminal block (1) according to claim 11, characterized by , - that the joining extension (27) has a joining contour (28) that corresponds to a joining element (29) of the support bracket (24), in particular by producing a positive fit or a positive locking connection, and / or - that the joining process (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 process (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 conductor rail (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 connecting contact (7), in particular a fork contact or fork contact leg (7a), provided on the current rail (5), in particular at the end of the rail opposite the insertion opening (9), in particular molded onto it. [13] Electrical terminal block (1) according to any 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 area of ​​the insertion opening (9), which projects into the spring arc (3c) of the clamping spring (3), preferably in contact with the spring arc (3c) and / or with the contact leg (3a). [14] Electrical terminal block (1) for clamping an electrical conductor (2), comprising - a busbar (5) with a side wall (5a) and a system wall (5b) and a contact wall (5c) spaced apart from it, forming a conductor connection channel (8) accessible via an insertion opening (9), - a clamping spring (3), in particular at least partially arranged in the conductor connection channel (8), with a leg (3a) contacting or bearing against the mounting wall (5b) of the busbar (5) and with a clamping leg (3b), in particular connected to this leg via a spring arc (3c), with a clamping edge (4) guided against the contact wall (5c) of the busbar (5) to form a clamping point (K) for clamping 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 mounting leg (3a). [15] Electrical terminal block (1) according to claim 14, characterized by , - that the actuating element (6) is pivotably mounted about a rotational axis (D) outside the busbar (5), in particular outside and / or on the wall side of the contact wall (5c) opposite the contact point (K), and / or - that the actuating element (6) can be inserted into the conductor connection channel (8) via a clearance (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 applied to and / or coupled to an actuating section (12) of the clamping leg (3b) of the clamping spring (3) which projects beyond the clamping edge (4). [16] Electrical terminal block (1) according to claim 14 or 15, characterized by , - that the actuating element (6) has a base body (6a) with coaxial bearing pins (15) molded onto both sides, and / or - that coaxial bearing pins (15a, 15b) of different axial lengths and / or different pin diameters are integrally 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 a keel-shaped section, and / or - that the actuating element (6) has a base body (6a) with an axial relief (16) forming a pivot contour (17), and / or - that the actuating element (6) has a lever section (6c) extending radially to the axis of rotation (D). [17] Electrical terminal block (1) for clamping 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, bearing pins (15) integrally formed on both sides, preferably coaxial, and / or - wherein bearing pins (15a, 15b) of different axial lengths and / or different pin diameters are integrally formed on the actuating element (6), in particular coaxial to each other, and / or - wherein the actuating element (6) has an eccentric section (6b) extending radially to the axis of rotation (D), in particular a keel-shaped section. and / or - wherein the actuating element (6) has a base body (6a) with an axial relief (16). [18] Electrical terminal block (1) for clamping an electrical conductor (2), comprising - a busbar (5) with a side wall (5a) and a system wall (5b) and a contact wall (5c) spaced apart from it, forming a conductor connection channel (8) accessible via an insertion opening (9), - a clamping spring (3), in particular at least partially arranged in the conductor connection channel (8), with a leg (3a) contacting or bearing against the mounting wall (5b) of the busbar (5) and with a clamping leg (3b), in particular connected to this leg via a spring arc (3c), with a clamping edge (4) guided against the contact wall (5c) of the busbar (5) to form a clamping point (K) for clamping 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) provided at the end of the busbar (5) opposite the insertion opening (9), in particular formed on it, preferably a fork contact with contact legs (7a, 7b) oriented in the insertion direction (E) and forming a contact point (33). [19] Electrical terminal block (1) for clamping an electrical conductor (2), in particular according to one of the preceding claims, comprising - a busbar (5) with a side wall (5a) and a system wall (5b) and a contact wall (5c) spaced apart from it, forming a conductor connection channel (8) accessible via an insertion opening (9), - a clamping spring (3), in particular at least partially arranged in the conductor connection channel (8), with a leg (3a) contacting or bearing against the mounting wall (5b) of the busbar (5) and with a clamping leg (3b), in particular connected to this leg via a spring arc (3c), with a clamping edge (4) guided against the contact wall (5c) of the busbar (5) to form a clamping point (K) for clamping 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, in particular with the busbar (5), preferably snapped into place with it. [20] Electrical terminal block (1) according to claim 19, characterized by , - that the housing parts (36, 37) have joining elements (39a, 39b) or snap-in 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 mounting 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 snap contour (41b) and the contact wall (5c) of the current rail (5) has a corresponding snap contour (40b) or a corresponding joining element (42b). [21] Electrical terminal block according to claim 19 or 20, characterized by , - that the conductor connection channel (8) is closed in an area 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), extends to actuate the clamping spring (3) or into which the actuating element (6), in particular its eccentric section (6b), is immersed, 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 closing the conductor connection channel (8) circumferentially, 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) circumferentially, and / or - that the terminal housing (35), in particular its first housing part (36), has an, 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 input channel (43) for the conductor (2) which opens, preferably conically, into the conductor insertion channel (8), and / or - that in a channel area (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 arc (3c) of the clamping spring (3).

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