conductor connection terminal

Abstract

Conductor connection terminal (1) with an insulating housing (3) having a conductor entry channel (2), a busbar (4), a clamping spring (5) and an actuating element (6), wherein - the clamping spring (5) has a contact leg (7), a spring arch (8) and a clamping leg (9), - the clamping leg (9) forms with the busbar (4) a clamping point (10) for an electrical conductor (11) which can be inserted into the conductor entry channel (2), - the clamping leg (9) can be moved between an open position (O) and a closed position (S) for opening and closing the clamping point (10), - the conductor connection terminal (1) is designed for automatic displacement of the clamping leg (9) into the closed position (S) upon insertion of an electrical conductor (11) into the conductor connection terminal (1) and - the actuating element (6) is designed to displace the clamping leg (9) into the open position (O), characterized in that the actuating element (6) is designed to be rotatable about its longitudinal axis (L) and has an actuating cam (12) which is designed to displace the clamping leg (9) into the open position (O) as a function of a rotation angle (α) of the actuating element (6).

Description

The invention relates to a conductor connection terminal having an insulating material housing having a conductor introduction channel, a busbar, a clamping spring and an actuating element, wherein the clamping spring has a contact limb, a spring bend and a clamping limb, wherein the clamping limb forms with the busbar a clamping point for an electrical conductor which can be introduced into the conductor introduction channel, wherein the clamping limb can be displaced between an open position and a closed position for opening and closing the clamping point, wherein the conductor connection terminal is configured for automatic displacement of the clamping limb into the closed position when an electrical conductor is introduced into the conductor connection terminal, and wherein the actuating element is configured for displacement of the clamping limb into the open position.Such conductor connection terminals are known from practice. These are conductor connection terminals with automatic connection of the electrical conductor to be connected when the latter is inserted into the conductor connection terminal. By inserting the electrical conductor, the clamping leg of the clamping spring held in the open position is automatically released and causes the electrical conductor to be clamped. The actuating element of the conductor connection terminal serves for returning the clamping leg into the open position for opening the clamping point, for example in order to release a clamped conductor again.With respect to the actuating element, it is desirable that this is designed for a sufficient transmission of force to the clamping leg of the clamping spring, but at the same time requires only a small installation space. Against this background, the object of the invention is to provide an improved conductor connection terminal with a compact and nevertheless reliably effective actuating mechanism.The object is achieved with a conductor connection terminal according to claim 1. Advantageous embodiments are disclosed in the dependent claims, the description and the figures.According to the features of independent claim 1, a conductor connection terminal is proposed with an insulating material housing having a conductor insertion channel, a busbar, a clamping spring and an actuating element, wherein the clamping spring has a contact leg, a spring bend and a clamping leg, wherein the clamping leg forms with the busbar a clamping point for an electrical conductor insertable into the conductor insertion channel, wherein the clamping leg is displaceable between an open position and a closed position for opening and closing the clamping point, wherein the conductor connection terminal is configured for an automatic displacement of the clamping leg into the closed position upon insertion of an electrical conductor into the conductor connection terminal, and wherein the actuating element is configured for displacement of the clamping leg into the open position, wherein the actuating element is configured to be rotatable about its longitudinal axis and has an actuating cam, which is configured for displacing the clamping limb into the open position as a function of a rotation angle of the actuating element.In other words, a conductor connection terminal with automatic conductor connection and a return of the clamping leg into the open position is proposed by a rotatable actuating element, the rotational movement of which can be converted by an actuating cam into a translatory displacement or pivoting movement of the clamping leg. This creates a very compact actuating mechanism which, in particular in the case of a correspondingly narrow construction and an arrangement of the actuating element close to the clamping limb, is associated with very low installation space stress. As a result, a particularly small-sized conductor connection terminal with an automatic conductor connection and an actuating element for restoring the clamping leg, which actuating element nevertheless acts reliably, can be realized.The insulating material housing of the conductor connection terminal, which is produced from a plastic material, for example, accommodates the busbar and clamping spring of the conductor connection terminal and protects the latter from environmental influences and contact. The conductor insertion channel can form an insertion channel which leads to the clamping point of the conductor connection terminal, for example, which is at least partially cylindrical or funnel-shaped, into which an end section of an electrical conductor can be inserted in a defined insertion direction into the insulating material housing and can be removed from the insulating material housing counter to the insertion direction. The conductor insertion channel can extend inclined to a housing surface of the insulating material housing. The busbar, also referred to as a contact piece or current bar, can be a largely rigid electrical conductor which is formed, for example, by a metal strip which, in order to form a clamping point, can be partially bent in accordance with advantageous design possibilities or can have a perforated collar produced by passage.The clamping spring of the conductor connection terminal can be a predominantly planar component with a substantially greater length and width extension than the depth extension, which can be produced in particular from an elastically resilient material. The clamping spring has a contact leg for supporting the clamping spring on the insulating material housing and / or the busbar, a clamping leg for clamping the conductor on the busbar and a spring bend between the contact leg and the clamping leg for deflecting the clamping spring, such that the contact leg can extend opposite the clamping leg at least in sections. When moved into its open position, the clamping leg can be displaceable towards the contact leg. The clamping leg can form a clamping point with the busbar for clamping the electrical conductor to the busbar by the conductor being pressed by the clamping leg against the busbar by means of the spring force of the clamping spring, such that reliable electrical contacting can be produced. The clamping leg is displaceable between an open position and a closed position for opening and closing the clamping point. In the open position of the clamping leg, the latter is spaced apart from the busbar and an optionally introduced electrical conductor, such that the clamping point is released and the conductor can be introduced into the conductor connection terminal and positioned in the region of the clamping point or removed therefrom. In the closed position of the clamping leg, the clamping leg is displaced towards the busbar and the inserted electrical conductor and exerts a contact pressure on the electrical conductor in the direction of the busbar, so that there is electrical contact between the conductor and the busbar.In order to realize an automatic conductor connection, the conductor connection terminal is configured for automatic displacement of the clamping leg into the closed position upon introduction of the electrical conductor into the conductor connection terminal. For this purpose, the conductor connection terminal has, in particular, a triggering mechanism which can be actuated by the inserted conductor and by means of which the clamping limb can be released from its open position and can automatically move into the closed position as a result of the spring force. In its open position, the clamping leg can be held in a ready state, for example by a suitable holding structure on the busbar or on an extended contact leg of the clamping spring, as will be explained in more detail below with reference to corresponding embodiments. Accordingly, it can be provided in particular that the actuating element of the conductor connection terminal is provided primarily for transferring the clamping leg into the open position by guiding the clamping leg to the holding structure and less for permanently holding the clamping leg, wherein embodiments in which the clamping leg is held by the actuating element are also not excluded.The actuating element of the conductor connection terminal can be a component which is embedded at least in sections in the insulating material housing. The actuating element can be rotatable, for example, between a ready position and an actuating position. The ready position can correspond to a closed position of the clamping limb and the actuation position can correspond to an open position of the clamping limb. The actuating element is rotatable about its longitudinal axis, wherein the longitudinal axis can be understood to mean a central longitudinal axis of the actuating element, which central longitudinal axis can run centrally through the actuating element along its greatest extent. The longitudinal axis can also be regarded as an axis along the extension of the actuating element between an operating surface, which is explained below, and an opposite free end of the actuating element. An actuating cam can be a radial projection on the outer contour of the actuating element, which exerts a force, in particular a compressive force, on the clamping limb during a rotation of the actuating element about its longitudinal axis. The actuating cam can, for example, only project radially in sections or be formed so as to project circumferentially with a variable distance between an outer cam edge and the actuating element, so that a force can be exerted on the clamping limb by means of the actuating cam as a function of the angle of rotation of the actuating element. This can also include, in particular, that under certain rotational angles or rotational angle ranges, no force is acting on the clamping leg. In principle, it is not excluded that the actuating element has a plurality of, i.e. at least two, actuating cams which can be arranged diametrically opposite one another, for example, and can each bring about a displacement of the clamping limb during a rotation of the actuating element. For example, during a complete rotation of the actuating element, two successively effective rotational angle ranges can thus be used for displacing the clamping leg.The actuating element can be rotatable by a limited angle of rotation between a ready position and an actuating position. In this case, the rotation of the actuating element can be mechanically limited, for example by a stop or a guide, in such a way that the actuating element can only be rotated between two predefined angular positions which correspond to the ready position and the actuating position. In other words, the actuating element can be rotated from the ready position into the actuating position and back again, while, for example, a complete rotation of the actuating element can be excluded according to the described embodiment. In other words, the actuating element can be rotated in a first rotational direction from the ready position into the actuating position and can be rotated in an opposite rotational direction from the actuating position into the ready position. In the ready position, the actuating cam can be rotated away from the clamping leg, so that no force acts on the clamping leg, while the actuating cam is increasingly rotated towards the clamping leg during a rotation into the actuating position and displaces the clamping leg accordingly by exerting force. By restricting the angle of rotation of the actuating element, a ready position and an actuating position can be clearly defined and an operating effort of the actuating element can be reduced by additional rotation through ineffective angles of rotation.The actuating element can be configured to displace the clamping limb from the closed position into the open position by means of a rotation of the actuating element by a rotation angle of between 30° and 90°. Even small rotational movements can thus lead to the desired effect, so that the actuation of the actuating element is simple and comfortable. For implementation, for example, the actuating cam of the actuating element can be designed such that it projects radially sufficiently far at the angular spacings mentioned in order to displace the clamping limb, or a plurality of actuating cams can follow one another at the angular spacings mentioned. In addition, the embodiment may be combined with the above-described embodiment, for example, and the limited rotation angle between the standby position and the operation position may be set to an angle between 30° and 90°. Advantageously, the actuating element can be configured to displace the clamping limb from the closed position into the open position by means of a rotation of the actuating element by a rotation angle of between 40° and 50°. According to a further development, the actuating element can be configured to displace the clamping leg from the closed position into the open position by means of a rotation of the actuating element by a rotation angle of 45°. Such a configuration has the advantage that an operating surface of the actuating element provided with a cross slot, for example, enables an easy optical distinction between the closed position and the open position by a changed cross slot orientation, while a 90° rotation, for example, would be connected to an optically identical cross slot orientation.The actuating element can be substantially pin-shaped with a radial projection as an actuating cam. The actuating element can have, for example, a cylindrical pin-like basic shape, wherein, for example, an embodiment as a triangular or square pin is also conceivable. The radial projection can be present in particular in an end region of the pin-shaped actuating element, in particular at an end of the actuating element facing the clamping limb. The actuating element can accordingly have an L-contour. The actuating cam can thereby form the shorter web shape of the L-contour and a pin-shaped section of the actuating element can form the longer web shape of the L-contour.The actuating cam may have a rounded actuating edge. This promotes a gentle displacement of the clamping leg and enables a facilitated introduction of force into the actuating element for displacing the clamping leg. The actuating cam can accordingly have a radius at its actuating edge facing the clamping limb, by means of which a gradual increase in force up to the apex of the actuating edge and a gentle decrease in force after the apex has been exceeded can be realized. According to one conceivable design option, the actuating cam can also be designed, for example, as a cam disk segment or a revolving cam disk with a corresponding curvature on the actuating edge for displacing the clamping limb.The actuating element can have an operating section for introducing an actuating force into the actuating element and an actuating section for transmitting the actuating force to the clamping limb. The operation portion may have an operation surface for inputting the operation force. The operating force may correspond to a torque introduced into the operating portion for rotating the operating element. According to one possible configuration, the operating surface can end substantially flush with a housing surface of the insulating material housing. The operating section can have a cylindrical basic shape. The operating section can merge via a step into the actuating section, which is designed, for example, in the form of a pin, that is to say can have a larger cross section than the actuating section. As a result, the actuating force can be easily introduced and the actuating element can nevertheless be kept narrow, so that there is little installation space stress in the interior of the conductor connection terminal. The actuating cam can be arranged on the actuating portion, in particular on a free end of the actuating portion. The actuating force introduced into the operating section is transmitted to the clamping limb via the actuating cam of the actuating section, wherein the rotary movement of the actuating element is converted into a translatory movement or pivotal movement of the clamping limb by the actuating cam.The actuating element can be produced, for example, from a plastic material in order to implement an actuating element that is easy and cost-effective to produce. Here, for example, the operation portion and the operation portion may be formed integrally with each other. Furthermore, the actuating cam can be formed integrally with the actuating element.The operating portion may include a metallic material. This allows a robust and reliably effective actuating element to be made possible. In this case, it can be provided that at least a part of the actuating section is metallic. A metallic material may be, for example, a substantially pure metal or a metal alloy. A metallic material can be, for example, spring steel. Spring steels are characterized by a high strength, but at the same time have sufficient elasticity to be able to compensate for punctiform force peaks during the actuation of the actuating element with elastic deformation. Furthermore, it is not excluded that the actuating section comprises further materials, for example a plastic material or a ceramic material. The metallic material may also be present in other portions of the actuator. For example, the actuating element can have a metallic core which is surrounded by a covering material, for example, in the region of the operating section and is exposed in the actuating section.The operating portion may comprise a plastic material. As a result, an actuating element that can be operated securely and comfortably can be implemented.The operating section can have a tool holder. A tool holder can be, for example, a groove shaped to match a screwdriver tip or a cross slot. By means of the tool holder, not only a facilitated introduction of force into the actuating element is possible, but also a visual indication of a position of the actuating element, from which a position of the clamping limb can be derived accordingly. The tool holder can additionally cooperate with an optical marking on the insulating material housing in order to improve the optical display. For example, it can be deduced from an orientation of the tool holder whether the actuating element is in a ready position or in an actuating position and accordingly whether the clamping limb is in the closed position or in the open position.The insulating housing may have an actuation channel for receiving the actuation element. This ensures a defined positioning of the actuating element in the conductor connection terminal and prevents tilting of the actuating element. The actuating element can be accommodated in the actuating channel in such a way that it is rotatable in the actuating channel about its longitudinal axis. The actuating channel can end starting from a housing surface in front of the actuating cam of the actuating element and merge into a connection space of the conductor connection terminal, in which space the clamping spring is arranged and into which the conductor insertion channel opens.The actuating channel can extend between a conductor insertion side of the insulating material housing and the clamping leg. This allows a compact design of the conductor connection terminal. The actuating channel can extend, for example, substantially perpendicularly to the housing surface of the insulating material housing, at which surface an electrical conductor can be introduced into the conductor connection terminal, in the direction of the clamping leg of the clamping spring. The conductor insertion channel of the conductor connection terminal can extend inclined with respect to the actuation channel.The contact limb can have a holding section with a holding edge for holding the clamping limb in its open position. As a result, the clamping leg can be temporarily fixable to the contact leg in its open position until an electrical conductor introduced into the conductor connection terminal triggers an automatic displacement of the clamping leg into the closed position. The clamping leg can have a retaining tab with which the clamping leg can engage behind the retaining edge, so that the clamping leg can be fixed to the contact leg in the manner of a latching. The holding section of the contact leg can, for example, extend under a bent portion from a contact section of the contact leg provided for supporting the contact leg on the insulating material housing and adjoining the spring bend, in particular be angled or bent away from the latter. According to one possible embodiment, the holding section can run substantially perpendicular to the contact section. The holding section can merge with a bend into a connecting section to a release section which will be explained below. According to one possible embodiment, the holding edge can be arranged at a transition from the holding section to the connecting section. Furthermore, it is conceivable that two holding edges arranged on both sides of the holding section are provided, which can interact with two correspondingly arranged holding tabs of the clamping leg. This allows an improved fixing of the clamping leg to the holding section.The holding section can be spaced apart from a conductor region of the insulating material housing, in which region an electrical conductor which can be introduced into the conductor connection terminal via the conductor introduction channel can be positioned. In this way, contact of the holding section by an inserted electrical conductor and an unintentional triggering of a displacement of the clamping leg into the closed position connected therewith can be reliably prevented. A distance between the holding portion and the conductor region may correspond to at least one quarter of a length of the clamping leg, according to a non-limiting embodiment.The contact limb can have a release section for releasing the clamping limb held in the open position when an electrical conductor strikes the release section. This makes it possible to provide a simple and reliably acting triggering mechanism which, in particular in cooperation with the above-described holding section, can be completely integrated into the clamping spring and can therefore be realized in a cost-effective and efficient manner. The release section can have, for example, an activation surface, onto which an electrical conductor introduced into the conductor connection terminal can be fed. An impact of the conductor on the activation surface can lead to a displacement of the release section and, for example, to an extension or displacement of the holding section connected thereto, which can bring about a release of the holding tab of the clamping leg from the holding edge of the holding section, so that the automatic, spring-force-induced displacement of the clamping leg into the closed position is activated. In other words, for example, a latching of the clamping leg on the contact leg can be releasable by a pressurization of the activation surface. The clamping spring can be designed in such a way that even a slight displacement of the release section by a, for example, flexible conductor end leads to a triggering of the automatic displacement of the clamping leg into the closed position, for example, by a comparatively small dimensioning of the holding edge on the holding section. The release section of the contact limb, in particular an activation surface of the release section, can be present at a free end of the contact limb. The release section can connect to the holding section of the contact limb via a connecting section. The holding section, the connecting section and the release section can together have two opposing bends and together form a Z-shape, so that the holding section and the release section can extend substantially parallel according to one possible configuration. The clamping point of the conductor connection terminal can be provided at an opening region of the conductor insertion channel into a connection space of the conductor connection terminal. The release section of the clamping spring can be arranged on a blind hole-like region of the connection space, which is situated opposite the opening region.The contact leg can have, starting from the spring bow, successively a contact section, a holding section and a release section. As a result, several possible functions of the contact limb are integrated into the clamping spring and are expediently connected to one another. A connecting portion may also be provided between the holding portion and the releasing portion, which connecting portion connects the holding portion to the releasing portion.The clamping leg can have an actuating segment adjoining the spring bow and a clamping segment which leads away from the actuating segment under a bend. The actuating segment of the clamping leg can be designed such that the actuating cam can engage the actuating segment and can displace the clamping leg. The actuating segment can connect to the spring bow. The clamping segment serves for clamping the electrical conductor to the busbar and can extend, for example, from the actuating segment as far as a free end of the clamping limb. By bending between the actuating segment and the clamping segment, the respective spatially different functions of the clamping leg can be effectively implemented.The actuating element can be automatically resettable when the clamping leg is automatically displaced into the closed position. As a result, a manual resetting of the actuating element after the transfer of the clamping limb into the open position is unnecessary. For example, the actuating element can be resettable from the actuating position into the ready position. For example, the clamping spring can be configured such that the clamping leg initially held in the open position is displaced into the closed position due to spring force when the triggering mechanism is actuated and carries along the actuating cam of the actuating element, i.e. moves it back into its ready position. Alternatively or additionally, it may be conceivable that the actuating element can be automatically reset in the event of a failure of an actuating force introduced into the actuating element or of a torque introduced into the actuating element. For example, the actuating element can have a prestressing element such as a spring, against the prestressing force of which the actuating element can be rotated and by means of which, in the event of the omission of an introduced actuating force, after the clamping limb is transferred into the open position, the actuating element is reset.In the context of this application, the words "a / an", unless expressly defined otherwise, are not to be understood as a numerical word, but rather as an indeterminate article having the word sense of "at least one / one".The invention permits various embodiments and is explained in more detail below with reference to an exemplary embodiment with the accompanying drawings. They show in schematic form: FIGS. 1 a- 1 b show a conductor connection terminal with a clamping leg of a clamping spring shown in a closed position and an open position in sectional side views along the section lines E-E and F-F shown in FIGS. 5 a- 5 b; FIGS. 2 a- 2 b show the conductor connection terminal according to FIGS. 1 aand 1 bin perspective front views with the suppression of an insulating material housing of the conductor connection terminal; FIGS. 2 c- 2 d-the conductor connection terminal according to FIGS. 1 aand 1 bin perspective rear views with the suppression of an insulating material housing of the conductor connection terminal; FIGS. 3 a- 3 b show the conductor connection terminal according to FIGS. 1 aand 1 bin perspective front views; FIGS. 4 a- 4 d show individual views of the clamping spring, a busbar and an actuating element of the conductor connection terminal according to FIGS. 1 aand 1 b; and FIGS. 5 a- 5 b show the conductor connection terminal according to FIGS. 1 aand 1 bin plan views.The aforementioned figures show a conductor connection terminal 1 according to an exemplary embodiment in various views.As can be seen in FIGS. 1 a, 1 b, 3 a, 3 b, 5 aand 5 b, the conductor connection terminal 1 has an insulating material housing 3. the insulating material housing 3 has a conductor introduction channel 2 running at an inclination to a housing surface 29 of the insulating material housing 3 shown in more detail in FIGS. 3 aand 3 b, through which an electrical conductor 11 can be introduced into the conductor connection terminal 1 as shown in FIGS. 1 b, 3 band 5 b. The conductor connection terminal 1 also has a busbar 4, which is illustrated in detail in FIG. 4 c, as an electrically conductive connection structure for connecting the electrical conductor 11.Furthermore, the conductor connection terminal 1 has a clamping spring 5 illustrated in detail in FIGS. 4 aand 4 b. The clamping spring 5 has a contact leg 7 for supporting the clamping spring 5 on the busbar 4 and / or on the insulating material housing 3, a spring bow 8 for deflecting the clamping spring 5 and a clamping leg 9 for clamping the electrical conductor 11. The clamping leg 9 serves to form with the busbar 4, in particular with the clamping tongue 26, a clamping point 10 which can be seen, for example, in FIG. 1 a, for the electrical conductor 11 inserted into the conductor insertion channel 2. The clamping leg 9 can be displaced between an open position O, shown for example in FIG. 1 b, in which the conductor 11 can be guided to the clamping point 10 or removed therefrom, and a closed position S, shown for example in FIG. 1 a, in which the conductor 11 can be clamped to the busbar 4. In this case, the clamping limb 9 can be displaced towards the contact limb 7 for displacement into its open position O. The clamping leg 9 has an actuating segment 23 adjoining the spring bow 8, on which an actuating cam 12 of an actuating element 6, described below, can engage, and a clamping segment 24 which leads from the actuating segment 23 under a bend 25, for clamping the conductor 11 at the clamping point 10.The conductor connection terminal 1 is configured for automatic displacement of the clamping leg 9 into the closed position S upon insertion of the electrical conductor 11 into the conductor connection terminal 1. For this purpose, the contact leg 7 of the clamping spring 5 has, as shown for example in FIGS. 4 aand 4 b, a holding section 18 with holding edges 19 for holding the clamping leg 9 in its open position O by means of holding tabs 27 arranged on the clamping leg 9, and a release section 21 for releasing the clamping leg 9 held in the open position O when an electrical conductor 11 hits the release section 21, The holding section 18 is spaced apart from a conductor region 20 of the insulating material housing 3, in which an electrical conductor 11 that can be inserted into the conductor connection terminal 1 via the conductor insertion channel 2 can be positioned, so that an accidental release of the clamping leg 9 from the contact leg 7 by touching an inserted conductor 11 is avoided. As can be seen, for example, in FIGS. 4 aand 4 b, starting from the spring bend 8, an abutment portion 22 for supporting the clamping spring 5 on the busbar and / or on the insulating material housing 3, the holding portion 18 and the release portion 21 are arranged in succession, wherein the holding portion 18 and the release portion 21 are connected to one another via a connecting portion 32. The release section 21 has an activation surface 31 shown, for example, in FIGS. 1 a, 4 aand 4 b, onto which the conductor 11 can be fed when it is introduced into the conductor connection terminal 1. FIG. 1 bshows a state just before the conductor 11 strikes the activation surface 31, so that the clamping leg 9 is released from the holding edges 19 by the contact of the activation surface 31 by the conductor 11 and the clamping leg 9 will be independently displaced into the closed position S.The conductor connection terminal 1 has an actuating element 6, which is illustrated in detail in FIG. 4 d and is designed for displacing the clamping limb 9 into the open position O. In this case, the actuating element 6 serves for displacing the clamping limb 9 to such an extent that the retaining tabs 27 of the clamping limb 9 shown in FIG. 4 acan engage behind the retaining edges 19 of the contact limb 7, such that the clamping limb 9 is held by the retaining portion 18 of the contact limb 7. As can be seen, for example, with reference to FIGS. 1 aand 1 band also FIGS. 2 ato 2 d, the actuating element 6, which is substantially pin-shaped, is rotatable about its longitudinal axis L. The actuating element 6 has an actuating cam 12 which is designed as a radial projection and is designed to move the clamping limb 9 into the open position O as a function of a rotation angle α of the actuating element 6. This creates a comparatively compact and nevertheless reliably effective actuating mechanism which is associated with a low installation space stress. It can be seen from FIG. 1 b, for example, that the actuating element 6 has an L-contour due to its pin shape and the actuating cam 12 arranged on the end of the actuating element 6 facing the clamping limb 9.As can be seen in FIG. 4 d, for example, the actuating cam 12 has a rounded actuating edge 12 a, so that a gentle and force-saving displacement of the clamping limb 9 is made possible.The actuating element 6 can be rotatable between a ready position B 1 shown, for example, in FIGS. 1 aand 2 aand an actuating position B 2. Not shown in more detail, but according to one possible embodiment for reducing the operating effort, it is conceivable to mechanically limit the rotation angle α, so that the actuating element 6 can be rotated by the limited rotation angle α between the ready position B 1 and the actuating position B 2.As can be seen, for example, in FIG. 4 d, the actuating element 6 has an operating section 13 with an operating surface 28 and a tool holder 15, which is shown here as a cross slot by way of example, for introducing an actuating force into the actuating element 6, and an actuating section 14 for transmitting the actuating force to the clamping limb 9 via the actuating cam 12. The operating section 13 can comprise a plastic material according to one possible embodiment. In principle, the actuating element 6 can also be formed in one piece. As can be seen, for example, from FIGS. 3 aand 3 b, the operating surface 28 can end substantially flush with a housing surface 29 of the insulating material housing 3.As indicated, for example, in FIGS. 2 ato 2 dand in FIGS. 5 ato 5 b, the actuating element 6 can be configured to displace the clamping limb 9 from the closed position S into the open position O by means of a rotation R of the actuating element 6 by a rotation angle α between 30° and 90°, such that a sufficient displacement of the clamping limb 9 can be achieved even with small rotation angles α. It can be seen from FIGS. 5 ato 5 bin this case that such a rotation angle α can be, for example, approximately 45° and as a result advantageously a position of the actuating element 6 and thus a position of the clamping limb 9 can be optically derived by an orientation of the tool holder 15 designed as a cross slot.As can be seen in FIGS. 1 aand 1 b, the actuating element 6 is accommodated in an actuating channel 16, so that a defined positioning of the actuating element 6 is present and this is secured against tilting. The actuating channel 16 runs between a conductor insertion side 17 of the insulating material housing 3 and the clamping limb 9, so that a compact arrangement is provided. The actuating channel 16 opens into a connection space 30 of the conductor connection terminal 1, in which the clamping spring 5 is arranged and into which the conductor insertion channel 2 opens.By means of the conductor connection terminal 1 described on the basis of the above exemplary embodiment, a conductor connection terminal 1 with an automatic conductor connection and with a compact and nevertheless reliably effective actuating mechanism for restoring the clamping limb 9 into its open position O can be provided.List of reference characters1 Conductor connection terminal 2 Conductor insertion channel 3 Insulating material housing 4 Busbar 5 Clamping spring 6 Actuating element 7 Contact limb 8 Spring bow 9 Clamping limb 10 Clamping point 11 Conductor 12 Actuating cam 12 a Edge 13 Operating section 14 Actuating section 15 Tool receptacle 16 Actuating channel 17 Conductor insertion side 18 Holding section 19 Holding edge 20 Conductor region 21 Release section 22 Contact section 23 Actuating segment 24 Clamping segment 25 Bend 26 Clamping tongue 27 Holding tab 28 Operating surface 29 Housing surface 30 Connection space 31 Activation surface 32 Connecting section B 1 Ready position B 2 Actuating position L Longitudinal axis O Open position R Rotation S Closed position α Angle of rotation

Claims

Conductor connection terminal (1) with an insulating material housing (3) having a conductor insertion channel (2), a busbar (4), a clamping spring (5) and an actuating element (6), wherein - the clamping spring (5) has a contact limb (7), a spring bow (8) and a clamping limb (9), - the clamping limb (9) forms with the busbar (4) a clamping point (10) for an electrical conductor (11) which can be inserted into the conductor insertion channel (2), - the clamping limb (9) can be displaced between an open position (O) and a closed position (S) for opening and closing the clamping point (10), the conductor connection terminal (1) is configured for automatically displacing the clamping leg (9) into the closed position (S) upon insertion of an electrical conductor (11) into the conductor connection terminal (1) and the actuating element (6) is configured for displacing the clamping leg (9) into the open position (O), characterized in that the actuating element (6) is configured to be rotatable about its longitudinal axis (L) and has an actuating cam (12) configured for displacing the clamping leg (9) into the open position (O) as a function of a rotation angle (α) of the actuating element (6).Conductor connection terminal (1) according to claim 1, characterised in that the actuating element (6) is rotatable by a limited rotation angle (α) between a ready position (B1) and an actuating position (B2).Conductor connection terminal (1) according to Claim 1 or 2, characterized in that the actuating element (6) is configured to displace the clamping limb (9) from the closed position (S) into the open position (O) by means of a rotation (R) of the actuating element (6) by a rotation angle (α) of between 30° and 90°.Conductor connection terminal (1) according to Claim 3, characterized in that the actuating element (6) is configured to displace the clamping limb (9) from the closed position (S) into the open position (O) by means of a rotation (R) of the actuating element (6) by a rotation angle (α) of 45°.Conductor connection terminal (1) according to one of the preceding claims, characterized in that the actuating element (6) is substantially pin-shaped with a radial projection as actuating cam (12).Conductor connection terminal (1) according to one of the preceding claims, characterized in that the actuating cam (12) has a rounded actuating edge (12a).Conductor connection terminal (1) according to one of the preceding claims, characterized in that the actuating element (6) has an operating section (13) for introducing an actuating force into the actuating element (6) and an actuating section (14) for transmitting the actuating force to the clamping limb (9).Conductor connection terminal (1) according to Claim 7, characterized in that the actuating section (14) comprises a metallic material.Conductor connection terminal (1) according to claim 7 or 8, characterised in that the operating section (13) comprises a plastic material.Conductor connection terminal (1) according to one of Claims 7 to 9, characterized in that the operating section (13) has a tool receptacle (15).Conductor connection terminal (1) according to one of the preceding claims, characterized in that the insulating material housing (3) has an actuating channel (16) for receiving the actuating element (6).Conductor connection terminal (1) according to Claim 11, characterized in that the actuating channel (16) runs between a conductor introduction side (17) of the insulating material housing (3) and the clamping limb (9).Conductor connection terminal (1) according to one of the preceding claims, characterized in that the contact limb (7) has a holding section (18) with a holding edge (19) for holding the clamping limb (9) in its open position (O).Conductor connection terminal (1) according to Claim 13, characterized in that the holding section (18) is spaced apart from a conductor region (20) of the insulating material housing (3), in which region an electrical conductor (11) which can be introduced into the conductor connection terminal (1) via the conductor introduction channel (2) can be positioned.Conductor connection terminal (1) according to one of the preceding claims, characterized in that the contact limb (7) has a release section (21) for releasing the clamping limb (9) held in the open position (O) when an electrical conductor (11) strikes the release section (21).Conductor connection terminal (1) according to one of the preceding claims, characterized in that the contact limb (7) has, starting from the spring bow (8), successively a contact section (22), a holding section (18) and a release section (21).Conductor connection terminal (1) according to one of the preceding claims, characterized in that the clamping limb (9) has an actuating segment (23) adjoining the spring bend (8) and a clamping segment (24) emerging from the actuating segment (23) under a bend (25).Conductor connection terminal (1) according to one of the preceding claims, characterized in that the actuating element (6) can be automatically reset in the event of automatic displacement of the clamping limb (9) into the closed position (S).

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