Spring force clamping connection, connection terminal and guide sleeve therefor

Abstract

The invention relates to a spring-loaded clamping connection having a clamping spring and a busbar, wherein an electrical conductor can be clamped to the busbar by means of a clamping leg of the clamping spring. The clamping legs are displaceable between a pre-tightening position and a clamping position. The invention further relates to a connection terminal having such a spring-loaded clamping connection and to a guide sleeve for a spring-loaded clamping connection.

Description

Field of the Invention

[0001] The present invention relates to a spring force clamping connector having a clamping spring and a bus bar, wherein an electrical conductor can be clamped to the bus bar by means of a clamping leg of the clamping spring. The clamping leg can be displaced between a pre-tensioned position and a clamping position.

[0002] The present invention also relates to a terminal having such a spring force clamping connector and a guide sleeve for the spring force clamping connector. Background Art

[0003] Spring force clamping connectors are used to clamp electrical conductors to a clamping site formed between a clamping leg of a clamping spring and a bus bar. To clamp an electrical conductor, the clamping spring can be pressed open from the bus bar by the electrical conductor against the force of the clamping spring during direct connection. This is feasible for rigid conductors, but not for stranded or braided conductors.

[0004] There is a need for a spring force clamping connector that self-retains in an open position for clamping electrical conductors. It is generally desired here to deliver terminals with open spring force clamping connectors from the factory.

[0005] EP 2 768 079B1 discloses a spring force terminal having a bus bar for contacting an electrical conductor and a clamping spring for fixing the electrical conductor in the spring force terminal. There is provided a holding mechanism supported on an insulating material housing or connected to a supporting leg of the clamping spring for locking the clamping spring in an open holding position and a movable reset mechanism for pivoting the clamping leg back into the locked state.

[0006] DE 10 2019 109 975A1 discloses a connection terminal for connecting an electrical conductor, the connection terminal including a housing having a wire insertion opening, a bus bar, a clamping spring, and an actuating element movably disposed in the housing along an actuating direction. The actuating direction of the actuating element is transverse to the insertion direction of the wire. The wire connection region of the housing is provided with a holding element at which the clamping leg of the clamping spring is held in the open position and disengaged from the holding element in the clamping position. The holding element has a pressing surface disposed transverse to the insertion direction of the wire, and the pressing surface can be actuated by the wire to be connected to release the clamping in order to transfer the clamping leg from the open position to the clamping position. Summary of the Invention

[0007] It is an object of the present invention to provide an improved spring force clamping connector and an improved terminal. In particular, a compact open holding element with optimized support should be provided.

[0008] The object is achieved by means of the spring force clamping connection according to the invention, the terminal according to the invention, and the guide sleeve according to the invention. Advantageous embodiments are described below.

[0009] It is proposed that the spring force clamping connection has a guide sleeve which is movably supported and is used for guiding the wire ends of the electrical conductors, and the guide sleeve has a control profile for displacing the clamping legs.

[0010] By means of such a guide sleeve, the guiding of the electrical conductor towards the clamping site and the control of the clamping legs for opening the clamping spring can be combined in one component. Here, a self-actuating spring force clamping connection can be achieved, in which the clamping legs are latched at the guide sleeve in the pre-tensioned position and are directly unlocked by the electrical conductor inserted into the guide sleeve and causing the guide sleeve to shift here, and are shifted into the clamping position.

[0011] The spring force clamping connection is thus self-actuating, such that an additional actuating element for manually actuating the clamping spring is not compulsorily necessary, even if such an additional actuation can be provided. The clamping legs are directly displaced via the guide sleeve and the inserted electrical conductor acting thereon or indirectly via a mechanical mechanism, for example because the electrical conductor actuates a release element and the inserted electrical conductor acts on the mechanical mechanism.

[0012] The guide sleeve can have a pocket-shaped receiving portion for the de-insulated wire ends of the electrical conductors. The pocket-shaped receiving portion can at least partially surround the electrical conductor and in particular the wire strands or the strands of a stranded wire.

[0013] The control profile can be, for example, the mechanical structure or the outer profile of the guide sleeve, which mechanical structure or outer profile is provided on the side of the guide sleeve facing the clamping legs and can deflect the clamping legs.

[0014] The movable support can be configured, for example, as a translational, axially movable support. Other movement trajectories are also conceivable. The movable support can in particular be configured such that the guide sleeve is movable in the wire insertion direction. Thus, the guide sleeve can be supported, for example, in such a way that it can move from an initial position to a clamping position and vice versa.

[0015] The clamping legs can be displaced, for example, between a rest position and / or a pre-tensioned position and a clamping position of the clamping legs. In the rest position, the guide sleeve and the electrical conductor are spaced apart from the clamping legs.

[0016] The clamping legs can be elastically displaceable. Here, it can be proposed that the deflection into the pre-tensioned position is caused by a force action and the automatic displacement into the clamping position is caused by the spring force of the clamping spring. The pre-tensioned position is based here on the spring-elastic pre-tension of the clamping legs.

[0017] The guide sleeve has the following advantages: providing protection for the end of the wire and preventing the fanning out of the stranded or twisted wire clamped. The guide sleeve is also suitable for wires or fine wire filaments with a small diameter, which cannot apply sufficient pressure without such a guide sleeve.

[0018] The guide sleeve can have a cross-section that tapers in the wire insertion direction.

[0019] In such a tapered case, the cross-section or diameter of the guide sleeve transverse to the wire insertion direction becomes smaller when observed in the wire insertion direction. Here, the guide sleeve is wider at the insertion side towards the electrical wire to be introduced into the guide sleeve than at the side facing away from the insertion side or the wire to be introduced. The tapered cross-section can exist over the entire length of the guide sleeve or also only over a part of the length. Advantageously, the pocket-shaped receiving part (wire pocket) at the end of the guide sleeve with a manipulation profile has a tapered cross-section.

[0020] With a cross-section that tapers in the wire insertion direction, deflection of the clamping legs can be achieved when the guide sleeve moves in the wire insertion direction.

[0021] The manipulation profile can have a guide ramp for the clamping legs or form such a guide ramp.

[0022] Such a guide ramp can be configured as a ramp-shaped surface of the guide sleeve that extends at an angle relative to the wire insertion direction, where the clamping legs extend on the surface when the guide sleeve moves in the wire insertion direction and can thus be deflected more and more until the clamping legs reach the pre-tensioned position. The rising direction of the guide ramp can roughly correspond to the rising direction of the clamping legs.

[0023] With the aid of such a guide ramp, slow and gradual deflection of the clamping legs can be advantageously achieved with a small manipulation force.

[0024] The guide sleeve can have a step. The step can exist, for example, at the manipulation profile. Thus, for example, a sudden reduction in cross-section can exist at the end of the guide ramp. The clamping legs deflected in the pre-tensioned position can jump towards the electrical wire at the step due to the spring force and clamp the electrical wire.

[0025] Such a step enables the clamping legs to suddenly and smoothly shift from the pre-tensioned position into the clamping position. Thereby, a force pulse is provided, through which the clamping edge of the clamping legs can penetrate into the metallic material of the electrical wire. In addition, an audible click can be achieved as feedback for the user.

[0026] The guide sleeve can be configured to lock the clamping leg in the clamping position. Thereby, mechanical fixation of the clamping leg in the clamping position can be achieved.

[0027] For this purpose, the guide sleeve can have a locking mechanism, for example in the form of a projection or a step, which can engage the clamping leg at the rear in the clamping position. The locking mechanism can be formed by a manipulation profile. The clamping leg can be latched at the guide sleeve, for example in such a way that the guide sleeve forms a stop for the clamping leg and the clamping leg is supported at the locking mechanism by a restoring force.

[0028] The guide sleeve can have an insertion funnel. Advantageously, an insertion aid is provided by means of this insertion funnel in order to bundle the wire strands and to center or orient the wire strands.

[0029] For this purpose, the guide sleeve can have a funnel-shaped cross-sectional widening at the end facing the wire to be inserted. The funnel can then taper in the wire insertion direction.

[0030] The insertion funnel can be spaced apart from the manipulation profile. Thereby, a sufficiently long path can be provided for bundling, guiding and orienting the wire ends. The insertion funnel can be arranged near the wire insertion opening here, and the wire pocket can be arranged near the clamping site.

[0031] The insertion funnel and the manipulation profile do not directly transition into each other, but are connected to each other, for example via a connecting tab and / or via a straight, for example hollow cylindrical, sleeve section. The section with the manipulation profile can form the wire pocket here, for example.

[0032] The guide sleeve can have a guide surface on the side facing away from the clamping leg. Thereby, the guiding of the guide sleeve can be facilitated.

[0033] The guide surface can be, for example, a flat guide surface which can slide along a busbar or another component (for example the housing wall of an insulating material housing). The guide surface can extend in the wire insertion direction. The guide surface can be opposite to the manipulation profile.

[0034] The guide sleeve can have a manipulation surface. In principle, an electrical wire inserted into the guide sleeve can displace the guide sleeve by means of an insertion force or a manipulation force applied via the electrical wire. Especially in the case of a small wire cross-section, the displacement of the guide sleeve can be supported by a manual pressure action at the manipulation surface or, if necessary, can be carried out completely by manual manipulation.

[0035] The manipulation surface can be arranged, for example, at the insertion funnel or protrude from the insertion funnel as a button.

[0036] The spring force clamping connection can have a manual actuating element for displacing the guide sleeve by means of manual actuation. The mentioned actuating surface can be the surface of the manual actuating element. The manual actuating element or its actuating surface can be easily manually accessible on the outside of the spring force clamping connection or on the outside of the terminal block having the spring force clamping connection. The manual actuating element or the actuating surface can be part of the guide sleeve or be configured as a separate component which can act mechanically on the guide sleeve.

[0037] The guide sleeve can have a cutout through which the electrical conductor inserted into the guide sleeve is accessible to the clamping leg and the busbar for electrically contacting the conductor end to the busbar. Here, the electrical conductor is advantageously accessible to the clamping leg and the busbar from two oppositely facing sides.

[0038] The spring force clamping connection can have a release mechanism. Thereby, the release of the conductor from the spring force clamping connection and its reuse are enabled.

[0039] The release mechanism serves to release the spring force clamping connection. The release mechanism can be configured to displace the clamping leg from the clamping position into the pretensioned position. Thereby, the guide sleeve together with the electrical conductor inserted therein is released in such a way that the clamping leg no longer engages the actuating profile from the rear.

[0040] The release mechanism can have an actuating member. Thereby, it can be ensured that the release of the electrical conductor is only carried out by an intentional actuation from the outside.

[0041] The release mechanism can act by means of a force application at the actuating member, for example by means of pressure with an actuating pusher. The force application can act manually on the actuating member directly or indirectly via an auxiliary tool acting on the actuating member, such as a screwdriver.

[0042] The release mechanism can be movably supported. Thereby, a simple mechanical mechanism can be advantageously achieved in order to displace the clamping leg by means of pressure.

[0043] The release mechanism can be translatably movable, i.e. axially movable, for example in the conductor insertion direction. The release mechanism can have a release profile which can displace the clamping leg. The release mechanism can, for example, press the clamping springs together in the region of the spring bow and thereby displace the clamping leg from the clamping position into the pretensioned position. The release profile can, for example, be configured as a tab or opening engaging the clamping leg from the rear, into which the spring bow sinks. The release profile can be configured such that the opening of the spring arms is reduced by the release profile when the release mechanism moves in the conductor insertion direction and thereby the clamping leg is displaced.

[0044] The spring force clamping connection can have a reset mechanism for guiding the sleeve. Thereby, after removing the electrical conductor, the spring force clamping connection can be simply returned to the pre-tensioned position for reuse.

[0045] This reset mechanism displaces the guiding sleeve into its initial position, in which the clamping spring is open and the clamping legs are held in the pre-locking position by means of the guiding sleeve. The reset by means of the reset mechanism can be coupled to the loosening process of the electrical conductor.

[0046] The reset mechanism can be a reset spring. This enables a simple feasibility of the reset without the need to directly couple the reset mechanism to the loosening mechanism.

[0047] The reset spring can act on the guiding sleeve. Preferably, the reset spring is a separate component from the clamping spring. The reset spring can be coupled to the guiding sleeve or can be arranged at an adjacent structure such that the reset spring exerts pressure on the guiding sleeve. Advantageously, the clamping legs prevent the reset by means of the reset spring in the clamping position of the guiding sleeve.

[0048] The reset mechanism can be a reset section of the clamping spring. This enables a simple, cost-effective and integrable reset solution into the clamping spring.

[0049] The reset section can be, for example, a bent section of the support leg of the clamping spring, which is pre-tensioned by the guiding sleeve in the wire insertion direction in the clamping position of the guiding sleeve and is relaxed by the loosening mechanism when the clamping legs and the guiding sleeve are released, such that the guiding sleeve is displaced in the direction opposite to the wire insertion direction.

[0050] The reset mechanism can be a rocker. This enables a reliable and stable mechanical reset solution.

[0051] This rocker acting as a reset mechanism can be arranged below the loosening mechanism and the guiding sleeve when viewed in the wire insertion direction. When the loosening mechanism moves to loosen the spring force clamping connection and hits the rocker side, the rocker side deflects. Thereby, the other rocker side deflects in the opposite direction and the guiding sleeve can be displaced in the direction opposite to the wire insertion direction. For this purpose, the loosening mechanism can be implemented with a manipulation section extended as required compared to other reset solutions.

[0052] The terminal can have an insulating material housing in which the spring force clamping connection is accommodated.

[0053] The insulating material housing can have a guiding channel for the guiding sleeve, in which the guiding sleeve is movably supported.

[0054] The guide channel together with the guide sleeve inserted therein provides a conductor insertion opening which extends in the conductor insertion direction and is partially or completely circumferentially delimited by a circumferential wall and leads to a clamping point formed between the clamping leg and the busbar on the spring force clamping connection.

[0055] The insulating material housing can have a guide channel for the release mechanism, in which the release mechanism is movably mounted.

[0056] Quite generally, in the context of the present application, unless explicitly defined differently, the terms “a” and “an” are not to be understood as numerals but as indefinite articles having the meaning of “at least one”. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The present invention allows for various embodiments and is explained below by way of example with reference to an exemplary embodiment with the aid of the accompanying drawings. The drawings show:

[0058] Figure 1 A perspective front view showing a first embodiment of a spring force clamping connection with a guide sleeve and a release mechanism in a clamped position;

[0059] Figure 2 Shown in the preloaded position with Figure 1 A side cross-sectional view of a terminal block with a spring force clamping connector;

[0060] Figure 3 Show Figure 1 A side cross-sectional view of a spring force clamping connector in a clamped position;

[0061] Figure 4 The device with the release mechanism actuated in the actuated position is shown. Figure 1 A side cross-sectional view of a terminal block with a spring force clamping connector;

[0062] Figure 5 Show Figure 1 A three-dimensional rear view of the spring force clamping connection in FIG.

[0063] Figure 6 A side sectional view of a connecting terminal according to a second embodiment of a spring force clamping connection with a guide sleeve and a release mechanism is shown in a preloaded position;

[0064] Figure 7 Shown in the clamped position Figure 6 A side cross-sectional view of a terminal block with a spring force clamping connection;

[0065] Figure 8 Shown in the actuated position with the actuated actuating element Figure 6Side cross-sectional view of a terminal block with a spring-force clamping connection;

[0066] Figure 9 Stereo front view showing a second embodiment of a spring-force clamping connection in a clamping position;

[0067] Figure 10 Showing Figure 9 Stereo rear view of the spring-force clamping connection in

[0068] Figure 11 Side cross-sectional view of a terminal block showing a third embodiment of a spring-force clamping connection with a guide sleeve and a release mechanism in a pre-tensioned position;

[0069] Figure 12 Showing in a clamping position Figure 11 Side cross-sectional view of the terminal block in

[0070] Figure 13 Showing in an actuating position a terminal block with an actuated release mechanism Figure 11 Side cross-sectional view of the terminal block in

[0071] Figure 14 Showing in a clamping position Figure 12 Stereo front view of the spring-force clamping connection in

[0072] Figure 15 Showing Figure 14 Stereo rear view of the spring-force clamping connection in Detailed description of the specific implementation

[0073] Figure 1 Stereo view showing a first embodiment of a spring-force clamping connection 1 with a guide sleeve 2 and an actuating element 3 in a clamping position.

[0074] The spring-force clamping connection 1 has a clamping spring 4 and a busbar 5. The clamping spring 4 is configured as a multi-leg spring having a support leg 6, a clamping leg 7, and a spring bow 8 connecting the support leg 6 and the clamping leg 7. The clamping leg 7 has a clamping edge 9, which may be present, for example, at the free end of the clamping leg 7 as shown, and together with the contact area 10 of the busbar 5 forms a clamping site for electrically clamping the electrical conductor 11 with its conductor end 12 to the busbar 5 by means of the clamping leg 7 of the clamping spring 4.

[0075] The guide sleeve 2 of the spring-force clamping connection 1 is configured to guide the conductor end 12 of the electrical conductor 11 inserted in the conductor insertion direction L. The guide sleeve 2 is movably supported in the conductor insertion direction L and has an actuating profile 13, which is configured to displace the clamping leg 7 when the guide sleeve 2 is moved.

[0076] It can be seen that the guide sleeve 2 is arranged next to the contact region 10 of the busbar 5 and is mounted displaceably on the busbar 5 with a guide surface 16 on the side facing away from the clamping leg 7 .

[0077] The guide sleeve 2 has a cutout 17, through which the inserted conductor end 12 can contact the busbar 5, and the clamping leg 7 can contact the conductor end 12 inserted into the guide sleeve 2. The cutout 17 thus opens the interior of the guide sleeve 2, which accommodates the conductor end 12, on the one hand toward the busbar 5 and on the other hand toward the clamping leg 7 and at least in these two directions. A pair of mutually opposite lateral webs 18 are formed by the cutout 17, which connect the upper section of the guide sleeve 2 and the lower section having the actuating contour 13 to each other.

[0078] On the upper side of the guide sleeve 2 viewed in the conductor insertion direction L, there may be an introduction funnel 19 which tapers in the conductor insertion direction L and is spaced apart from the actuation contour 13. The actuation contour 13 may form the lower end of the guide sleeve 2, and the introduction funnel 19 may form the opposite upper end of the guide sleeve. This optional introduction funnel 19 facilitates the insertion of the electrical conductor 11 into the guide sleeve 2 and provides a bearing surface for the insulating sleeve of the electrical conductor 11, via which insertion and release forces can be applied to the guide sleeve 2 in order to move the guide sleeve 2. The conductor end 12 is thereby relieved of stress.

[0079] In addition to the introduction funnel 19 , the guide sleeve 2 has a housing portion 20 with an actuating surface 21 as a cover and a side wall 22 adjoining thereto.

[0080] The release mechanism 3 can be designed, for example, in the form of a movably supported actuating pressure piece. The release mechanism has an actuating head 23, which has a retaining contour 24 on the upper side, which can have, for example, a slot-shaped groove and / or a recess. An actuating tool, such as, for example, a screwdriver, can be placed on the actuating head 23 to press the release mechanism 3 downward. The retaining contour 24 then prevents the actuating tool from slipping off.

[0081] The release mechanism 3 has an actuating element 25, which contacts the clamping leg 7 and, when the release mechanism 3 is pressed downward, displaces the clamping leg 7 from the illustrated clamping position toward the support leg 6 into the prestressed position. As shown by way of example, the actuating element 25 can be designed as a frame into which the clamping spring 4 is inserted with its support leg 6 and the clamping leg 7. The support leg 6 is supported on the release mechanism 3. As a result, the release mechanism 3 can be arranged behind the clamping spring 4, so that the clamping spring 4 is positioned between the longitudinally extending section 26 of the release mechanism 3 and the guide sleeve 2.

[0082] Alternatively, other embodiments can be envisaged, in which, for example, the longitudinally extending section 26 of the release mechanism 3 is arranged between the clamping leg 7 and the guide sleeve 2 and directly loads the clamping leg 7. It is also conceivable to have a terminal or pivot rod without a loaded release mechanism, which is actuated by an actuating tool that loads the clamping leg 7 and displaces it towards the support leg 6, whereupon the actuating tool is removed again.

[0083] Figure 2 A side sectional view of a terminal 27 with an insulating material housing 28 is shown, into which the spring force clamping connection 1 is inserted. Shown in the unactuated pre-tensioned position Figure 1 of the spring force clamping connection 1 therein.

[0084] The insulating material housing 28 has a guide channel 29 in which the guide sleeve 2 is movably supported in the wire insertion direction L. In addition, the insulating material housing 28 has an actuating channel 30 in which the release mechanism 3 in the form of an actuating push piece is movably supported. The actuating channel 30 can extend parallel to the guide channel 29 also in the wire insertion direction L.

[0085] The clamping spring 4 is arranged in the intermediate space between the actuating channel 30 and the guide channel 29. In the accommodation space between the actuating channel 30 and the guide channel 29, the insulating material housing 28 has a support pin 31 that is partially circumferentially surrounded by the spring bow 8 of the clamping spring 4. Thereby, the clamping spring 4 is supported at the insulating material housing 28.

[0086] The clamping leg 7 springs away from the support leg 6 by the restoring force of the clamping spring 4 and bears against the guide ramp 14 of the guide sleeve 2 under spring tension. Here, the electrical wire 11 has already been inserted into the guide sleeve 2 such that the wire end 12 sinks into the wire collection pocket 32 in the end section of the guide sleeve 2. However, the guide sleeve 2 has not yet been displaced by the release force applied to the guide sleeve 2 via the electrical wire 11. The guide sleeve is still in its initial position for the pre-tensioned position.

[0087] The guide sleeve 2 is held in the shown pre-tensioned position by a restoring mechanism formed by a restoring spring 33. The restoring spring 33 is configured, for example, as a compression spring that bears with one end in the support recess 34 of the insulating material housing 28 and with the opposite end against the underside of the actuating surface 21 of the housing section 20 of the guide sleeve 2. Thereby, a restoring force is applied to the guide sleeve 2 that displaces the guide sleeve 2 away from the bottom of the guide channel 29 in the opposite direction to the wire insertion direction L, on which the horizontal support section 35 of the busbar 5 is supported.

[0088] The further sliding out of the guide sleeve 2 can be prevented by an invisible stop between the guide sleeve 2 and the insulating material housing 28.

[0089] The release mechanism 3 is positioned in the pre-tensioned position such that it is in the initial position in which the clamping legs 7 can spring open relative to the contact area 10 of the busbar 5 largely unimpeded. The frame-shaped actuating member 25 is in the vicinity of the support pin 31 and the spring bow 8 supported thereon.

[0090] Figure 3 A side sectional view of the terminal 27 of the spring-force clamping connection 1 in the clamping position is shown with Figure 1 in it.

[0091] It can be seen that the electrical conductor 11 is now plugged in downward in the conductor insertion direction L and is placed with its insulation jacket on the support 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 release force to move the guide sleeve 2 in the conductor insertion direction L towards the support section 35. Here, the free ends of the clamping legs 7 slide along the guide surface 14 of the guide sleeve 2 until they reach the step 15 where there is a clamping edge 9 and no other sections are connected. Then, the clamping legs 7 can spring open unimpeded through the cutout 17 in the guide sleeve 2 towards the conductor end 12, and the conductor end 12 is loaded by the restoring force of the clamping spring 4 via the clamping edge 9. Thereby, the conductor end 12 is clamped between the clamping edge 9 and the contact area 10 of the busbar 5 and is conductively connected to the busbar 5. Here, the conductor end 12 is squeezed or bent on the side facing away from the clamping legs 7 to abut against the busbar 5.

[0092] It is clear that the return spring 33 is now pressed together and pre-tensioned in the clamping position. However, the clamping of the electrical conductor 12 by the clamping spring 4 keeps the guide sleeve 2 in the pre-tensioned clamping position.

[0093] Figure 4 A side sectional view of the terminal 27 of the spring-force clamping connection 1 with the actuated release mechanism 3 in the actuating position is shown with Figure 1 in it.

[0094] The release mechanism 3 is actuated by displacing the release mechanism in the actuation channel 30 by an actuation force acting in the conductor insertion direction L. The actuation force can be applied to the actuating head 23 from the outside by an actuating tool. Thereby, the frame-shaped actuating member 25 moves along the support leg 6 and the clamping legs 7, wherein the clamping legs 7 are displaced towards the support leg 6 against the restoring force of the clamping spring 4.

[0095] Here, the clamping of the end of the wire 12 is released, and the guide sleeve 2 is displaced from the clamping position shown in Figure 2 away from the support section 35 to the shown initial position by the restoring force of the restoring spring 33.

[0096] If the actuating force is no longer applied to the release mechanism 3 now, the restoring force of the clamping spring 4 presses the release mechanism 3 upward again via the frame-shaped actuating member 25 toward the support pin 31. Thereby, the clamping legs 7 spring open again until they abut against the guide ramp 14 and reach the Figure 2 pre-tensioned position shown in.

[0097] Figure 5 Shown Figure 1 is a three-dimensional rear view of the spring-force clamping connection 1 in.

[0098] Here, the frame-shaped actuating member 25 becomes clear, and the clamping spring 4 is inserted into the actuating member with its support legs 6 and clamping legs 7. It can be seen that the support leg 6 is supported at the end wall of the frame of the actuating member 25, and the end wall is beside the section 26 of the release mechanism 3, i.e., the actuating press piece, which extends longitudinally in the wire insertion direction L. The support leg 6 can also be additionally supported in the insulating material housing 28.

[0099] Figure 6 Shows a side cross-sectional view of the terminal 27 of the second embodiment of the spring-force clamping connection 1 with a guide sleeve 2 and a release element 3 in the pre-tensioned position.

[0100] Except for the reset mechanism, the structure is largely similar to the first embodiment, so that the related implementation can be referred to.

[0101] The reset mechanism is now formed integrally with the clamping spring 4. For this purpose, the reset section 36 bends at the end of the support section 6 extending in the wire insertion direction L toward the vertical section of the busbar 5 having the contact area 10. The reset section 36 abuts against the actuating profile 13 at the lower side of the guide sleeve 2. The reset section 36 is spring-elastic and applies a restoring force to the guide sleeve 2 in the direction opposite to the wire insertion direction L. Thereby, the guide sleeve 2 is brought to the shown pre-tensioned position.

[0102] Further sliding out of the guide sleeve 2 can be prevented by an invisible stop between the guide sleeve 2 and the insulating material housing 28.

[0103] Figure 7 Shows in the clamping position Figure 6 is a side cross-sectional view of the terminal 27 in.

[0104] The guide sleeve 2 is now displaced downward toward the bottom of the guide channel 29 or the support section 34. Here, the return section 36 that abuts against the lower side of the actuating contour 13 deflects, and the angle between the plane of the support section 6 of the clamping spring and the plane of the return section 36 extending therefrom increases. This induces a restoring force in the spring-elastic return section 36.

[0105] Figure 8 A side sectional view of the terminal block 27 with the actuated release element 3 in the actuated position is shown. Figure 6 of the terminal block 27.

[0106] The clamping leg 7 is displaced toward the support leg 6 by means of the release element 3 and the electrical conductor 12 is released. Thereby, the guide sleeve 2 is no longer blocked and is displaced back into the initial position by the restoring force of the return section 36 against the wire insertion direction L.

[0107] If the actuating force is no longer applied to the release mechanism 3 now, the restoring force of the clamping spring 4 presses the release mechanism 3 upward again via the frame-shaped actuating member 25 toward the support pin 31. Thereby, the clamping leg 7 springs open again until it abuts against the guide ramp 14 and reaches the pre-tensioned position shown in Figure 6 ...

[0108] Figure 9 Shown is Figure 7 a perspective view of the spring-force clamping connection 1 in the clamped position in..., and Figure 10 Shown is Figure 7 a perspective rear view of the spring-force clamping connection in the clamped position in....

[0109] It is clear that the return section 36 extends from the end of the support leg 6 toward the contact area 10 of the busbar 5, i.e., toward the vertical section of the busbar 5, and extends below the guide sleeve 2. Thereby, the return section 36 interacts with the guide sleeve 2 in order to apply a restoring force to the guide sleeve 2.

[0110] Figure 11 A side sectional view of the terminal block 27 is shown, which terminal block has a third embodiment of the spring-force clamping connection 1 in the pre-tensioned position, which spring-force clamping connection has a guide sleeve 2 and a release mechanism 3 and a swing lever 37 as a return mechanism.

[0111] The difference from the embodiment described above lies in the return mechanism, so reference is additionally made to the embodiment above.

[0112] In the intermediate space between the bottom of the guide channel 29 and the actuating channel 30, i.e., in the intermediate space between the optional horizontal support section 35 of the busbar 5 and the lower end of the guide sleeve 2 or the release mechanism 3, the rocker 37 is pivotally supported about the support shaft 38. The rocker 37 can be supported, for example, at the insulating material housing 28 and / or the busbar 5 by means of the support shaft 38.

[0113] The release arm 39 of the rocker 37 extends from the support shaft 38 to the vertical section of the busbar 5, which has the contact area 10. The release arm 39 is in the alignment line of the guide sleeve 2 below the guide sleeve 2 in the wire insertion direction L and can displace the guide sleeve 2 upward. On the opposite side of the rocker 37, the return arm 40 extends into the longitudinally extending alignment line of the release mechanism 3, so that it is below the release mechanism 3 in the wire insertion direction L. Thereby, the release mechanism 3 can load the return arm 40 in the state of being pressed downward toward the rocker 37 and thereby pivot the rocker 37.

[0114] Figure 12 Shown in the clamping position Figure 11 Side sectional view of the terminal 27 with the spring-force clamping connection 3 in

[0115] The guide sleeve 2 is displaced downward in the wire insertion direction L by the inserted electric wire 12. At the lower end of the guide sleeve 2, the actuating profile 13 loads the release arm 39 and pivots the rocker 37, so that the return arm 40 is displaced toward the lower end of the release mechanism 3.

[0116] Figure 13 Shown in the actuating position with the actuated release mechanism 3 Figure 11 Side sectional view of the terminal 27 with the spring-force clamping connection 3 in

[0117] Here, the release mechanism 3 is pressed into the insulating material housing 28 and loads the return arm 40 of the rocker 37. Thereby, the rocker 37 pivots back to the initial position, and the guide sleeve 2 is pressed upward again to the Figure 11 initial position in. Thereby, the return of the guide sleeve 2 is achieved by actuating the terminal 27 via the release mechanism 3 via the rocker 37.

[0118] Figure 14 Shown in the clamping position Figure 12 Stereo front view of the spring-force clamping connection 1 in Figure 15 Shown in the clamping position Figure 12 Stereo rear view of the spring-force clamping connection in

[0119] It is clear that the rocker arm 37 is arranged in free space below, on the one hand, the alignment line extending longitudinally of the guide sleeve 2 and, on the other hand, below the alignment line extending longitudinally of the release mechanism 3. The release arm 39 abuts against the actuating profile 13 at the lower side of the guide sleeve 2.

[0120] In the clamping position, no force is applied from the rocker arm 39 to the actuating profile 13. Only in Figure 13 the reset situation shown, is a reset force applied to the guide sleeve 2 by the release mechanism 3 via the rocker arm 37.

[0121] The release mechanism is shifted into the initial position such that the frame-shaped actuating member 25 is positioned adjacent to the transition of the spring bow 8 to the support leg 6 and the clamping leg 7. The free end of the release mechanism 3 is spaced apart from the reset arm 40 such that the rocker arm 37 is not loaded by the release element 3 in the clamping position.

[0122] List of reference numerals

[0123] 1 Spring force clamping connection

[0124] 2 Guide sleeve

[0125] 3 Release mechanism

[0126] 4 Clamping spring

[0127] 5 Busbar

[0128] 6 Support leg

[0129] 7 Clamping leg

[0130] 8 Spring bow

[0131] 9 Clamping edge

[0132] 10 Contact area

[0133] 11 Electric wire

[0134] 12 Wire end

[0135] 13 Actuating profile

[0136] 14 Guide ramp

[0137] 15 Step

[0138] 16 Guide surface

[0139] 17 Notch

[0140] 18 Tab

[0141] 19 Introduction funnel

[0142] 20 Housing section

[0143] 21 Control surface

[0144] 22 Side wall

[0145] 23 Control head

[0146] 24 Retaining profile

[0147] 25 Operating member (frame)

[0148] 26 Longitudinally extending section of the release mechanism

[0149] 27 Terminal

[0150] 28 Insulating material housing

[0151] 29 Guide channel (for guiding the sleeve)

[0152] 30 Operating channel (for the release mechanism)

[0153] 31 Support pin

[0154] 32 Wire collection bag

[0155] 33 Return spring

[0156] 34 Support recess

[0157] 35 Support section

[0158] 36 Return section

[0159] 37 Rocker arm

[0160] 38 Support shaft

[0161] 39 Release arm

[0162] 40 Return arm

[0163] L Wire insertion direction

Claims

1. A spring force clamping connection (1) having 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 prestressed position and a clamped position, characterized in that The spring force clamping connection (1) has a movably mounted guide sleeve (2) for guiding a conductor end (12) of an electrical conductor (11), and the guide sleeve (2) has an actuating contour (13) for displacing the clamping leg (7).

2. The spring force clamping connection (1) according to claim 1, characterized in that The guide sleeve (2) has a cross section which tapers in the wire insertion direction (L).

3. The 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 leg (7).

4. The spring force clamping connection (1) according to any one of the preceding claims, characterized in that The guide sleeve (2) has a step (15).

5. The spring force clamping connection (1) according to any one of the preceding claims, characterized in that The guide sleeve (2) is configured to lock the clamping leg (7) in the clamping position.

6. The spring force clamping connection (1) according to any one of the preceding claims, characterized in that The guide sleeve (2) has an introduction funnel (19).

7. The spring force clamping connection (1) according to claim 6, characterized in that The introduction funnel (19) is spaced apart from the maneuvering contour (13).

8. The spring force clamping connection (1) according to any one of the preceding claims, characterized in that The guide sleeve (2) has a guide surface (16) on the side facing away from the clamping leg (7).

9. The spring force clamping connection (1) according to any one of the preceding claims, characterized in that The guide sleeve (2) has an actuation surface (21).

10. The spring force clamping connection (1) according to any 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 to the clamping legs (7) and the busbar (5) through the cutout (17) in order to make electrical contact of the conductor end (12) to the busbar (5).

11. The spring force clamping connection (1) according to any one of the preceding claims, characterized in that The spring force clamping connection (1) has a release mechanism (3).

12. The spring force clamping connection (1) according to claim 11, characterized in that The release mechanism (3) has an operating element (25).

13. The spring force clamping connection (1) according to claim 11 or 12, characterized in that The release mechanism (3) is movably mounted.

14. The spring force clamping connection (1) according to any one of the preceding claims, characterized in that The spring force clamping connection (1) has a return mechanism (33, 36, 37) for the guide sleeve (2).

15. The spring force clamping connection (1) according to claim 14, characterized in that The reset mechanism is a reset spring (33).

16. The spring force clamping connection (1) according to claim 14, characterized in that The restoring mechanism is a restoring section (36) of the clamping spring (4).

17. The spring force clamping connection (1) according to claim 14, characterized in that The reset mechanism is a rocker rod (37).

18. A connecting terminal (27) having a spring force clamping connection (1) according to any one of the preceding claims.

19. The connecting terminal (27) according to claim 18, characterized in that The connecting terminal (27) has an insulating material housing (28) in which the spring force clamping connection (1) is accommodated.

20. The connecting 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 the guide sleeve (2) is movably mounted.

21. The connecting terminal (27) according to claim 19 or 20, characterized in that: The insulating material housing (28) has an actuation channel (30) in which a release mechanism (3) can be movably mounted or an actuation tool can be introduced into the actuation channel in the direction of the clamping leg (7).

22. A guide sleeve (2) for a spring force clamping connection (1) according to any one of claims 1 to 17.

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