Spring-loaded clamp connection, conductor connection terminal and guide sleeve for this purpose

Abstract

Spring-loaded clamping connection (1) with a clamping spring (4) and a busbar (5), wherein an electrical conductor (11) can be clamped to the busbar (5) by means of a clamping leg (7) of the clamping spring (4), wherein the clamping leg (7) can be displaced between a preload position and a clamping position, characterized in that the spring-loaded clamping connection (1) has a movably mounted guide sleeve (2) for guiding a conductor end (12) of the electrical conductor (11) and that the guide sleeve (2) has an actuating contour (13) for displacing the clamping leg (7).

Description

The invention relates to a spring force clamping connection having a clamping spring and a busbar, wherein an electrical conductor can be clamped to the busbar by means of a clamping limb of the clamping spring. The clamping leg is displaceable between a pretensioning position and a clamping position,The invention further relates to a conductor connection terminal with such a spring force clamping connection and to a guide sleeve for a spring force clamping connection.Spring force clamping connections serve for clamping an electrical conductor to a clamping point which is formed between the clamping limb of a clamping spring and a busbar. For clamping the electrical conductor, the clamping spring can be pressed away from the busbar by the electrical conductor against the force of the clamping spring during direct connection. This is possible for rigid conductors, but not for multi-wire conductors or stranded conductors.There is a need for clamping electrical conductors to provide a spring force clamping connection in a self-holding manner in an open position. It is often desired that conductor connection terminals with open spring force clamping connection are delivered at the factory.EP 2 768 079 B1 discloses a spring force clamp having a busbar for contacting an electrical conductor and a clamping spring for fixing the electrical conductor in the spring force clamp. A holding means, which is mounted on the insulating material housing or connected to the contact limb of the clamping spring, is provided for latching the clamping spring in a holding-open position, and a displaceable restoring means is provided for pivoting the clamping limb back into the latching state.DE 10 2019 109 975 A1 discloses a connection terminal for connecting an electrical conductor comprising a housing with a conductor insertion opening, a busbar, a clamping spring and an actuating element which is arranged in the housing so as to be movable along an actuating direction. The actuation direction of the actuation element is formed transversely to the insertion direction of the conductor. The conductor connection region of the housing is equipped with a holding element on which the clamping leg of the clamping spring is held in the open position and from which the clamping leg is released in the clamping position. The holding element has a pressing surface arranged transversely to the insertion direction of the conductor, which can be actuated to release the clamping by the conductor to be connected in order to transfer the clamping limb from the open position into the clamping position.It is an object of the present invention to provide an improved spring force terminal and an improved conductor terminal. In this way, in particular a compact hold-open element with optimized mounting is to be provided.The object is achieved with the spring force terminal having the features of claim 1 and with the conductor terminal having the features of claim 18 and with the guide sleeve having the features of claim 22. Advantageous embodiments are described in the dependent claims.It is proposed that the spring force clamping connection has a movably mounted guide sleeve for guiding a conductor end of the electrical conductor, and that the guide sleeve has an actuating contour for displacing the clamping limb.With the aid of such a guide sleeve, the guidance of an electrical conductor to the clamping point can be combined with the actuation of the clamping leg for opening the clamping spring into a component. In this case, a self-actuating spring force clamping connection can be created, in which the clamping leg is latched on the guide sleeve in the prestressing position and is immediately unlatched by an electrical conductor inserted into the guide sleeve and displacing the guide sleeve in the process and is displaced into the clamping position.The spring force clamping connection is thus self-actuating, so that no additional actuating element is absolutely necessary for manual actuation of the clamping spring, even if such an additional actuation can be provided. The clamping leg is displaced directly via the guide sleeve and the inserted electrical conductor acting thereon itself or indirectly by a mechanism on which the inserted electrical conductor acts, for example because the electrical conductor actuates a trigger.The guide sleeve can have a pocket-shaped receptacle for the stripped conductor end of an electrical conductor. The pocket-shaped receptacle can hold the electrical conductor and, in particular. The conductor wires of a multi-wire conductor or stranded conductor can enclose them at least in sections.The actuating contour can be, for example, a mechanical structure or outer contour of the guide sleeve, which is arranged on a side of the guide sleeve facing the clamping limb and can deflect the clamping limb.The movable bearing can be designed, for example, as a translatory, axially movable bearing. Other movement paths are equally conceivable. The movable mounting can be designed in particular such that mobility of the guide sleeve in the conductor insertion direction is possible. Thus, the guide sleeve can be mounted movably, for example, from a starting position into a clamping position and vice versa.The clamping leg can be displaceable, for example, between a rest position and / or a pre-tensioning position and a clamping position of the clamping leg. In the rest position, the guide sleeve and the electrical conductor are spaced apart from the clamping limb.The clamping leg can be elastically displaceable. In this case, a deflection into the pretensioning position by a force effect and an automatic displacement into the clamping position by a spring force of the clamping spring can be provided. The pretensioning position is based here on the spring-elastic pretensioning of the clamping leg.The guide sleeve has the advantage of providing protection of the conductor end and of preventing brushing on of a clamped multi-wire conductor or stranded conductor. The guide sleeve is also suitable for small diameter conductors or for fine conductor wires which could not exert sufficient compressive force without such a guide sleeve.The guide sleeve can have a cross section tapering in the conductor insertion direction.The cross-sectional area or the diameter of the guide sleeve transversely to the conductor insertion direction becomes smaller when such a narrowing is seen in the conductor insertion direction. The guide sleeve is wider on the insertion side facing the electrical conductor to be inserted into the guide sleeve than on the side facing away from this insertion side or the conductor to be inserted. The tapering cross section can be present over the entire length of the guide sleeve or else only over a part of the length. It is advantageous if a pocket-shaped receptacle (conductor pocket) at the end of the guide sleeve, at which the actuating contour is present, has a conically tapering cross section.A cross section tapering in the conductor insertion direction can allow a deflection of the clamping leg when the guide sleeve is moved in the conductor insertion direction.The actuating contour can have a guide slope for the clamping leg or form such a guide slope.Such a guide slope can be formed as a ramp-shaped surface of the guide sleeve, which surface runs at an angle relative to the conductor insertion direction, wherein the clamping leg runs on this surface during a movement of the guide sleeve in the conductor insertion direction and is thus increasingly deflectable until the clamping leg reaches a pre-tensioning position. The pitch direction of the guide slope can correspond approximately to the pitch direction of the clamping leg.With such a guide slope, a gentle gradual deflection of the clamping limb can be achieved with low actuating forces.The guide sleeve may have a step. The step can be present, for example, on the actuating contour. Thus, for example, at the end of the guide slope, a jump-like reduction in cross section can be present. A clamping leg deflected into the pre-tensioning position can spring on the step in the direction of the electrical conductor and clamp it firmly.Such a step enables an abrupt rapid displacement of the clamping leg from the pre-tensioning position into the clamping position. This provides a force impulse, by means of which a clamping edge of the clamping leg can dig into the metal material of the electrical conductor. In addition, this allows an audible click sound to be achieved as feedback for the user.The guide sleeve can be configured to lock the clamping leg in the clamping position. This allows a mechanical securing of the clamping leg in the clamping position.For this purpose, the guide sleeve can have locking means, for example in the form of a projection or a step, which can engage behind the clamping limb in the clamping position. The locking means can be formed by the actuating contour. The clamping leg can latch on the guide sleeve, for example in that the guide sleeve forms a stop for the clamping leg and the clamping leg rests on the locking means by the restoring force.The guide sleeve can have an insertion funnel. With such an insertion funnel, an insertion aid is advantageously provided in order to bundle and center or align the conductor wires.For this purpose, the guide sleeve can have a funnel-shaped cross-sectional widening at an end facing the conductor to be inserted. The funnel can then taper in the conductor insertion direction.The insertion funnel can be spaced apart from the actuation contour. This allows a sufficiently long distance to be provided for bundling, guiding and aligning the conductor end. The insertion funnel can be arranged close to the conductor insertion opening and the conductor pocket close to the clamping point.The insertion funnel and the actuating contour do not merge directly into one another, but are connected to one another, for example, via a connecting web and / or via a straight, for example hollow cylindrical sleeve section. The section having the actuating contour can here form a conductor pocket, for example.The guide sleeve can have a guide surface on a side facing away from the clamping leg. This makes it possible to facilitate the guidance of the guide sleeve.The guide surface can be, for example, a planar guide surface which can slide along the busbar or another component (for example the housing wall of an insulating material housing). The guide surface can extend in the conductor insertion direction. It can be opposite the actuating contour.The guide sleeve can have an actuating surface. In this case, the electrical conductor inserted into the guide sleeve can in principle displace the guide sleeve by an insertion or actuation force applied via the electrical conductor. In particular in the case of small conductor cross sections, the displacement of the guide sleeve can be assisted by a manual pressure force acting on the actuating surface or, if appropriate, can take place completely by a manual actuation.The actuating surface can be arranged, for example, on the insertion funnel or project from the insertion funnel as a push button.The guide sleeve can have a cutout, wherein an electrical conductor inserted into the guide sleeve is accessible for the clamping leg and the busbar through the cutout for the electrical contacting of the conductor end to the busbar. The electrical conductor is advantageously accessible from two diametrically opposite sides for the clamping leg and the busbar.The spring force clamping connection may have a release. This allows the conductor to be released from the spring force clamping terminal and reused.The release agent serves to release the spring force clamping terminal. It can be configured to displace the clamping leg from the clamping position into the pretensioning position. As a result, the guide sleeve with the electrical conductor inserted therein is released in that the clamping leg no longer engages behind the actuating contour.The solvent may have an actuator. This makes it possible to ensure that the electrical conductor is released only by intentional actuation from the outside.The release can become effective by a force effect on the actuator, for example by a pressure force with an actuating pusher. The force can be applied manually to the actuator directly or indirectly via an auxiliary tool, e.g. screwdriver, acting on the actuator.The solvent can be movably mounted. This advantageously allows a simple mechanism to be created in order to displace the clamping limb by means of a compressive force.The release means can be translatory, i.e. axially movable, e.g. in the conductor insertion direction. It can have a release contour which can displace clamping legs. The release means can, for example, compress the clamping spring in the region of the spring arch and thereby displace the clamping leg from the clamping position into the prestressing position. The release contour can be formed, for example, as a web or opening which engages behind the clamping limb and into which the spring bend dips. The release contour can be designed such that the spread of the spring arms is reduced by the release contour during a movement of the release in the conductor insertion direction and the clamping leg is thereby displaced.The spring force clamping connection can have a restoring means for the guide sleeve. Thus, the spring force clamping terminal can be easily returned to the bias position after the removal of an electric conductor for the next reuse.Such a restoring means displaces the guide sleeve into its starting position, in which the clamping spring is opened and the clamping limb with the guide sleeve is held in the pre-latching position. The resetting by the resetting means can be coupled to the releasing process of the electrical conductorThe restoring means can be a restoring spring. This provides a simple possibility of recovery without the need for direct coupling of the recovery means to the solvent.The restoring spring can act on the guide sleeve. The restoring spring is preferably a part separate from the clamping spring. The return spring may be coupled to the guide sleeve or may be disposed on an adjacent structure such that the return spring exerts a compressive force on the guide sleeve. It is advantageous if the clamping leg prevents the resetting by the restoring spring in the clamping position of the guide sleeve.The restoring means can be a restoring section of the clamping spring. This achieves a simple, cost-effective restoring solution which can be integrated into the clamping spring.The restoring section can be, for example, a bent section of a contact limb of the clamping spring, which in a clamping position of the guide sleeve is prestressed by the latter in the conductor insertion direction and which relaxes by the release means when the clamping limb and the guide sleeve are released, such that the guide sleeve is displaced counter to the conductor insertion direction.The reset means can be a rocker. This enables a reliable and stable mechanical reset solution.Such a rocker acting as a restoring means can be arranged below the release means and the guide sleeve, as seen in the conductor insertion direction. When the release means for releasing the spring force clamping connection is moved and impinges on a rocker side, it is deflected. As a result, the other rocker side is deflected in the opposite direction and can displace the guide sleeve counter to the conductor insertion direction. For this purpose, the release means can be designed, if necessary, with an actuating section which is extended in relation to the other reset solutions.The conductor terminal may have an insulating housing in which the spring force terminal is accommodated.The insulating material housing can have a guide channel for the guide sleeve, in which the guide sleeve is movably mounted.The guide channel, with the guide sleeve inserted therein, provides a conductor insertion opening which extends in the conductor insertion direction and is partially or fully delimited by encircling walls and which leads out to a clamping point formed at the spring-force clamping connection between clamping limb and busbar.The insulating material housing can have a guide channel for the solvent, in which the solvent is movably mounted.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 below by way of example with the accompanying drawings on the basis of exemplary embodiments. The following are shown: FIG. 1 shows a perspective front view of a first embodiment of a spring force clamping connection with guide sleeve and release means in the clamping position; FIG. 2 shows a side sectional view of a conductor connection terminal with the spring force terminal connection from FIG. 1 in the prestressing position; FIG. 3 is a side sectional view of the spring force clamping connection from FIG. 1 in the clamping position; FIG. 4 shows a side sectional view of the conductor connection terminal with the spring force terminal connection from FIG. 1 in the actuation position with the solvent actuated; FIG. 5 is a rear perspective view of the spring force clamping terminal of FIG. 1 ; FIG. 6 shows a side sectional view of a conductor connection terminal with a second embodiment of a spring force terminal connection with guiding sleeve and release means in the prestressing position; FIG. 7 shows a side sectional view of the conductor connection terminal with the spring force clamping connection from FIG. 6 in the clamping position; FIG. 8 shows a side sectional view of the conductor connection terminal with the spring force terminal connection from FIG. 6 in the actuation position with the actuation element actuated; FIG. 9 is a perspective front view of the second embodiment of the spring force clamping connection in the clamping position; FIG. 10 is a rear perspective view of the spring force clamping terminal of FIG. 9; FIG. 11 is a side sectional view of a conductor terminal with a third embodiment of a spring force terminal with guiding sleeve and release means in the pre-tensioning position; FIG. 12 shows a side sectional view of the conductor connection terminal from FIG. 11 in the clamping position; FIG. 13 is a side sectional view of the conductor connection terminal from FIG. 11 in the actuation position with the solvent actuated; FIG. 14 is a perspective front view of the spring force clamping connection from FIG. 12 ; in the clamping position; FIG. 15 is a rear perspective view of the spring force terminal of FIG. 14.FIG. 1 shows a perspective view of a first embodiment of a spring force clamping connection 1 with a guide sleeve 2 and an actuating element 3 in the clamping position.The spring force clamping terminal 1 has a clamping spring 4 and a bus bar 5. The clamping spring 4 is designed as a leg spring with a contact leg 6, a clamping leg 7 and a spring bow 8 connecting the contact leg 6 to the clamping leg 7. The clamping leg 7 has a clamping edge 9, which, for example, as shown, can be present at the free end of the clamping leg 7 and together with a contact region 10 of the busbar 5 forms a clamping point in order to electrically conductively clamp an electrical conductor 11 to the busbar 5 by means of its conductor end 12 by means of the clamping leg 7 of the clamping spring 4.The guide sleeve 2 of the spring force clamping connection 1 is designed to guide the conductor end 12 of an electrical conductor 11 inserted in the conductor insertion direction L. The guide sleeve 2 is mounted movably in the conductor insertion direction L and has an actuating contour 13 which is formed for displacing the clamping limb 7 when the guide sleeve 2 is displaced.It can be seen that the guide sleeve 2 is arranged next to the contact region 10 of the busbar 5 and is mounted on the busbar 5 such that it can be displaced by a guide surface 16 on the side facing away from the clamping limb 7.The guide sleeve 2 has a cutout 17, through which an inserted conductor end 12 can come into contact with the busbar 5 and the clamping limb 7 can contact the conductor end 12 inserted into the guide sleeve 2. The cutout 17 thus faces the busbar 5 on the one hand and the clamping leg 7 on the other hand and opens the interior of the guide sleeve 2 receiving the conductor end 12 at least in these two directions. The cutout 17 forms a pair of mutually opposite lateral webs 18 which connect the upper section of the guide sleeve 2 to the lower section which has the actuating contour 13.On the upper side of the guide sleeve 2, as seen in the conductor insertion direction L, an insertion funnel 19 can be present, which tapers in the conductor insertion direction L and is spaced apart from the actuating contour 13. The actuating contour 13 can form the lower end and the insertion funnel 19 can form the opposite upper end of the guide sleeve 2. Such an optional insertion funnel 19 facilitates the insertion of the electrical conductor 11 into the guide sleeve 2 and provides a support surface for the insulating jacket of the electrical conductor 11, via which a plug-in and release force can be exerted on the guide sleeve 2 in order to displace the guide sleeve 2. The conductor end 12 is thus relieved.In addition to the insertion funnel 19, the guide sleeve 2 has a housing section 20 with an actuating surface 21 as a cover and side walls 22 adjoining the latter.The release 3 can be designed, for example, in the form of a displaceably mounted actuating presser. It has an actuating head 23 with a holding contour 24 on the upper side, which can have a slot-shaped groove and / or depression, for example. An actuating tool, such as a screwdriver, can be placed on the actuating head 23 to press down the solvent 3. The holding contour 24 then prevents the actuating tool from slipping off.The release 3 has an actuator 25 which comes into contact with the clamping limb 7 and displaces the clamping limb 7 from the illustrated clamping position toward the contact limb 6 into the prestressing position when the release 3 is pressed down. As illustrated by way of example, the actuator 25 can be designed as a frame into which the clamping spring 4 is inserted with its contact limb 6 and clamping limb 7. The contact leg 6 is mounted on the solvent 3. The release 3 can thus be arranged behind the clamping spring 4, so that the clamping spring 4 is positioned between the longitudinally extending section 26 of the release 3 and the guide sleeve 2.Other embodiments are alternatively conceivable, in which e.g. the longitudinally extending section 26 of the release 3 is arranged between the clamping leg 7 and the guide sleeve 2 and acts directly on the clamping leg 7. Pivot levers or conductor connection terminals without built-in solvent are also conceivable, in which an actuation is effected by an actuating tool which acts on the clamping limb 7 and displaces it towards the contact limb 6, wherein the actuating tool is subsequently removed again.FIG. 2 shows a side sectional view of a conductor terminal 27 with an insulating material housing 28, into which the spring force terminal 1 is installed. The spring force clamping connection 1 from FIG. 1 is shown in the unactuated prestressing position.The insulating material housing 28 has a guide channel 29 in which the guide sleeve 2 is mounted so as to be displaceable in the conductor insertion direction L. Furthermore, the insulating material housing 28 has an actuating channel 30, in which the solvent 3 is displaceably mounted in the form of an actuating pusher. The actuating channel 30 can also extend parallel to the guide channel 29 in the conductor insertion direction L.The clamping spring 4 is arranged in the intermediate space between the actuating channel 30 and the guide channel 29. In this receiving space between the actuating channel 30 and the guide channel 29, the insulating material housing 28 has a bearing pin 31 which is partially surrounded circumferentially by the spring arch 8 of the clamping spring 4. The clamping spring 4 is thus mounted on the insulating material housing 28.The clamping leg 7 is sprung away from the contact leg 6 by the restoring force of the clamping spring 4 and bears under spring tension against the guide slope 14 of the guide sleeve 2. The electrical conductor 11 is already inserted into the guide sleeve 2 so that the conductor end 12 dips into a conductor collection pocket 32 in the end section of the guide sleeve 2. However, the guide sleeve 2 is not yet displaced by a release force applied to the guide sleeve 2 via the electrical conductor 11. It is still in the starting position for the prestressing position.The guide sleeve 2 is held in the illustrated prestressing position by a restoring means formed from a restoring spring 33. The restoring spring 33 is designed, for example, as a compression spring, which is mounted with one end in a bearing pocket 34 of the insulating material housing 28 and rests with the opposite end on the underside of the actuating surface 21 of the housing section 20 of the guide sleeve 2. A restoring force is thus exerted on the guide sleeve 2, which displaces the guide sleeve 2 away from a base of the guide channel 29, on which a horizontal support section 35 of the busbar 5 is supported, in the opposite direction to the conductor insertion direction L.A further sliding out of the guide sleeve 2 can be prevented by means of non-visible stops between the guide sleeve 2 and the insulating material housing 28.The release means 3 is positioned in the prestressing position such that it is in the starting position, in which the clamping leg 7 can deflect largely unimpeded toward the contact region 10 of the busbar 5. The frame-shaped actuator 25 is located in the vicinity of the bearing pin 31 and the spring bow 8 supported thereon.FIG. 3 shows a side sectional view of the conductor connection terminal 27 with the spring force clamping connection 1 from FIG. 1 in the clamping position.It can be seen that the electrical conductor 11 is now inserted downward in the conductor insertion direction L and in the process rests with its insulating material jacket on the bearing surface of the insertion funnel 19. The insertion force applied to the electrical conductor 11 during insertion is thereby transmitted to the guide sleeve 2 and acts as a triggering force in order to displace the guide sleeve 2 in the conductor insertion direction L toward the support section 35. In this case, the free end of the clamping limb 7, at which the clamping edge 9 is located and no longer adjoins a further portion, slides off the guide surface 14 of the guide sleeve 2 until the step 15 is reached. The clamping leg 7 can then spring freely through the cutout 17 in the guide sleeve 2 towards the conductor end 12 and can act with the clamping edge 9 on the conductor end 12 by the restoring force of the clamping spring 4. The conductor end 12 is thus clamped between the clamping edge 9 and the contact region 10 of the busbar 5 and is electrically conductively connected to the busbar 5. The conductor end 12 is pressed or bent through the cutout 17 on the side facing away from the clamping leg 7 in order to come to rest against the busbar 5.It is clear that the restoring spring 33 is now compressed and prestressed in this clamping position. The clamping of the electrical conductor 12 by the clamping spring 4 holds the guide sleeve 2 however in the prestressed clamping position.FIG. 4 shows a side sectional view of the conductor connection terminal 27 with the spring force clamping connection 1 from FIG. 1 in the actuation position with the solvent 3 actuated.The release 3 is actuated by being displaced in the actuation channel 30 by an actuation force acting in the conductor insertion direction L. The operating force can be applied to the operating head 23 from the outside by an operating tool. As a result, the frame-shaped actuator 25 is displaced along the contact limb 6 and clamping limb 7, wherein the clamping limb 7 is displaced towards the contact limb 6 counter to the restoring force of the clamping spring 4.The clamping of the conductor end 12 is thereby canceled and the guide sleeve 2 is displaced with the aid of the restoring force of the restoring spring 33 out of the clamping position shown in FIG. 2 away from the support section 35 into the illustrated initial position.If now no actuating force is applied any longer to the release means 3, the restoring force of the clamping spring 4 pushes the release means 3 upwards again via the frame-shaped actuator 25 in the direction of the bearing journal 31. The clamping leg 7 thus springs out again until it bears against the guide slope 14 and the prestressing position is reached, which is illustrated in FIG. 2.FIG. 5 is a rear perspective view of the spring force clamping terminal 1 of FIG. 1.The frame-shaped actuator 25 into which the clamping spring 4 is inserted with its contact leg 6 and clamping leg 7 becomes clear. It can be seen that the contact leg 6 is mounted on the end wall of the frame of the actuator 25, which lies next to the section 26 of the release means 3, i.e. of the actuating presser, which extends longitudinally in the conductor insertion direction L. The contact leg 6 can additionally also be mounted in the insulating material housing 28.FIG. 6 shows a side sectional view of a conductor connection terminal 27 with a second embodiment of a spring force terminal connection 1 with guide sleeve 2 and release element 3 in the prestressing position.The construction, with the exception of the restoring means, is substantially comparable to the first exemplary embodiment, so that reference can be made to the explanations in this respect.The restoring means is now formed integrally with the clamping spring 4. For this purpose, a reset section 36 at the end of the contact section 6 extending in the conductor insertion direction L is bent toward the vertical section of the busbar 5 having the contact region 10. The restoring section 36 abuts the actuating contour 13 on the underside of the guide sleeve 2. The restoring section 36 is spring-elastic and exerts a restoring force on the guide sleeve 2 opposite to the conductor insertion direction L. The guide sleeve 2 is thus brought into the illustrated prestressing position.A further sliding out of the guide sleeve 2 can be prevented by means of non-visible stops between the guide sleeve 2 and the insulating material housing 28.FIG. 7 shows a side sectional view of the conductor connection terminal 27 from FIG. 6 in the clamping position.The guide sleeve 2 is now displaced downwards towards the bottom of the guide channel 29 or of the support section 34. In this case, the restoring section 36 bearing against the underside of the actuating contour 13 is deflected and the angle between the plane of the bearing section 6 of the clamping spring and the restoring section 36 projecting therefrom is enlarged. This induces a restoring force in the resilient restoring portion 36.FIG. 8 shows a side sectional view of the conductor connection terminal 27 from FIG. 6 in the actuation position with the release element 3 actuated.The clamping leg 7 is displaced with the aid of the release element 3 toward the contact leg 6 and has released the electrical conductor 12. As a result, the guide sleeve 2 is no longer blocked and is displaced back into the starting position counter to the conductor insertion direction L by the restoring force of the restoring section 36.If now no actuating force is applied any longer to the release means 3, the restoring force of the clamping spring 4 pushes the release means 3 upwards again via the frame-shaped actuator 25 in the direction of the bearing journal 31. The clamping leg 7 thus springs out again until it bears against the guide slope 14 and the prestressing position is reached, which is illustrated in FIG. 6.FIG. 9 shows a perspective view and FIG. 10 shows a perspective rear-side view of the spring force clamping connection 1 from FIG. 7 in the clamping position.It is clear that the reset section 36 protrudes from the end of the contact leg 6 in the direction of the contact region 10 of the busbar 5, i.e. toward the vertical section of the busbar 5, and extends under the guide sleeve 2. Thus, the restoring portion 36 interacts with the guide sleeve 2 in order to exert a restoring force on the guide sleeve 2.FIG. 11 shows a side sectional view of a conductor terminal 27 which has a third embodiment of a spring force terminal 1 in the prestressing position with a guide sleeve 2 and a release 3 and a rocker 37 as restoring means.The difference from the previously described embodiments consists in the restoring means, so that reference is made otherwise to the above explanations.In the intermediate space between the bottom of the guide channel 29 and the actuating channel 30, i.e. the optional horizontal support section 35 of the busbar 5, and the lower end of the guide sleeve 2 or the release 3 a rocker 37 is mounted pivotably about a bearing axis 38. The rocker 37 can be mounted with the bearing axle 38 on the insulating material housing 28 and / or the busbar 5, for example.A release arm 39 of the rocker 37 extends from the bearing axle 38 as far as the vertical section of the busbar 5, which has the contact region 10. The release arm 39 is located in alignment with the guide sleeve 2 in the conductor insertion direction L below the guide sleeve 2 and can displace the guide sleeve 2 upwards. On the opposite side of the rocker 37, a reset arm 40 extends into alignment with the longitudinal extent of the release 3 and is thus located below the release 3 in the conductor insertion direction L. The release 3 can thus act on the reset arm 40 in the state pressed down toward the rocker 37 and can thus pivot the rocker 37.FIG. 12 shows a side sectional view of the conductor connection terminal 27 with the spring force clamping connection 3 from FIG. 11 in the clamping position.The guide sleeve 2 is displaced downward in the conductor insertion direction L by the inserted electrical conductor 12. At the lower end of the guide sleeve 2, the actuating contour 13 acts on the release arm 39 and pivots the rocker 37 such that the reset arm 40 is displaced towards the lower end of the release means 3.FIG. 13 shows a side sectional view of the conductor connection terminal 27 with the spring force clamping connection 3 from FIG. 11 in the actuation position with the solvent 3 actuated.The release 3 is pressed into the insulating material housing 28 and acts on the reset arm 40 of the rocker 37. as a result, the rocker 37 is pivoted back into the starting position and presses the guide sleeve 2 upwards again into the starting position from FIG. 11 with the aid of the release arm 39 acting on the actuating contour 13. A return of the guide sleeve 2 is thus achieved by actuating the conductor connection terminal 27 with the release 3 via the rocker 37.FIG. 14 is a front perspective view and FIG. 15 is a rear perspective view of the spring force clamping terminal 1 of FIG. 12 in the clamping position.It is clear that the rocker 37 is arranged in the free space on the one hand below the alignment of the longitudinal extent of the guide sleeve 2 and on the other hand below the alignment of the longitudinal extent of the solvent 3. The release arm 39 abuts the actuating contour 13 on the underside of the guide sleeve 2.In the clamping position, no force is exerted by the rocker 39 on the actuating contour 13 by the release arm 39. Only in the case of the resetting shown in FIG. 13 is a resetting force exerted by the release 3 on the guide sleeve 2 via the rocker 37.The release means is displaced into the starting position, so that the frame-like actuator 25 is positioned adjacent to the transition of the spring bend 8 into the contact limb 6 and the clamping limb 7. The free end of the release 3 is spaced apart from the resetting arm 40, so that in the clamping position no actuation of the rocker 37 by the release element 3 takes place.List of reference characters1 Spring force clamping connection 2 Guide sleeve 3 Release 4 Clamping spring 5 Busbar 6 Contact limb 7 Clamping limb 8 Spring bend 9 Clamping edge 10 Contact region 11 Electrical conductor 12 Conductor end 13 Actuating contour 14 Guide slope 15 Step 16 Guide surface 17 Cutout 18 Webs 19 Insertion funnel 20 Housing section 21 Actuating surface 22 Side walls 23 Actuating head 24 Retaining contour 25 Actuator (frame) 26 Longitudinally extending section of the release 27 Conductor connection clamp 28 Insulating material housing 29 Guide channel (for the guide sleeve) 30 Actuating channel (for the release) 31 Bearing journal 32 Conductor collecting pocket 33 Restoring spring 34 Bearing pocket 35 Support section 36 Restoring section 37 Rocker 38 Bearing axis 39 Release arm 40 Restoring arm L Conductor insertion directionReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedEP 2 768 079 B1

[0005] DE 10 2019 975 A1

[0006]

Claims

Spring force clamping connection (1) with a clamping spring (4) and a busbar (5), wherein an electrical conductor (11) can be clamped to the busbar (5) by means of a clamping limb (7) of the clamping spring (4), wherein the clamping limb (7) can be displaced between a prestressing position and a clamping position, characterized in that the spring force clamping connection (1) has a movably mounted guide sleeve (2) for guiding a conductor end (12) of the electrical conductor (11), and in that the guide sleeve (2) has an actuating contour (13) for displacing the clamping limb (7).Spring force clamping connection (1) according to Claim 1, characterized in that the guide sleeve (2) has a cross section which narrows in the conductor insertion direction (L).Spring force clamping connection (1) according to Claim 1 or 2, characterized in that the actuating contour (13) has or forms a guide bevel (14) for the clamping limb (7).Spring force clamping connection (1) according to one of the preceding claims, characterized in that the guide sleeve (2) has a step (15).Spring force clamping connection (1) according to one of the preceding claims, characterized in that the guide sleeve (2) is configured to lock the clamping limb (7) in the clamping position.Spring force clamping connection (1) according to one of the preceding claims, characterized in that the guide sleeve (2) has an introduction funnel (19).Spring force clamping connection (1) according to Claim 6, characterized in that the introduction funnel (19) is spaced apart from the actuating contour (13).Spring force clamping connection (1) according to one of the preceding claims, characterized in that the guide sleeve (2) has a guide surface (16) on a side facing away from the clamping limb (7).Spring force clamping connection (1) according to one of the preceding claims, characterized in that the guide sleeve (2) has an actuating surface (21).Spring force clamping connection (1) according to one of the preceding claims, characterized in that the guide sleeve (2) has a cutout (17), wherein an electrical conductor (11) inserted into the guide sleeve (2) is accessible for the clamping limb (7) and the busbar (5) through the cutout (17) for the electrical contacting of the conductor end (12) to the busbar (5).Spring force clamping connection (1) according to one of the preceding claims, characterized in that the spring force clamping connection (1) has a release means (3).Spring force clamping connection (1) according to Claim 11, characterized in that the release means (3) has an actuator (25).Spring force clamping connection (1) according to Claim 11 or 12, characterized in that the release means (3) is mounted movably.Spring force clamping connection (1) according to one of the preceding claims, characterized in that the spring force clamping connection (1) has a restoring means (33, 36, 37) for the guide sleeve (2).Spring force clamping connection (1) according to Claim 14, characterized in that the restoring means is a restoring spring (33).Spring force clamping connection (1) according to Claim 14, characterized in that the restoring means is a restoring section (36) of the clamping spring (4).Spring force clamping connection (1) according to Claim 14, characterized in that the restoring means is a rocker (37).Conductor connection terminal (27) with a spring force terminal (1) according to one of the preceding claims.Conductor connection terminal (27) according to Claim 18, characterized in that the conductor connection terminal (27) has an insulating material housing (28), in which the spring force clamping connection (1) is accommodated.Conductor connection terminal (27) according to Claim 19, characterized in that the insulating material housing (28) has a guide channel (29) for the guide sleeve (2), in which guide channel the guide sleeve (2) is mounted movably.Conductor connection terminal (27) according to Claim 19 or 20, characterized in that the insulating material housing (28) has an actuating channel (30), in which a release means (3) can be movably mounted or an actuating tool can be introduced towards the clamping limb (7).Guide sleeve (2) for a spring force clamping connection (1) according to one of Claims 1 to 17.

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