Spring force clamping connection piece and connection terminal

Abstract

The invention relates to a spring-loaded clamping connection, comprising: a busbar, which has a clamping region; and a cage type tension spring. The clamping section of the cage tension spring has a retaining contour which, in an open position of the cage tension spring, is latched to the busbar or to a support leg supported on the busbar, in which the clamping section of the cage tension spring is latched to the busbar or to a support leg supported on the busbar, and in which the clamping section of the cage tension spring is latched to the support leg. The clamping point is opened by a displacement of the actuation section towards the support leg and by a distance between the transverse web and the clamping region of the busbar. The tension bar protrudes from an end region of a clamping section of the cage tension spring, which end region is connected to a transverse web delimiting a recess, and wherein the tension bar extends away in the lead-in direction and has a release section directed towards the busbar, which release section is designed to release the tension bar from the end region of the clamping section of the cage tension spring. When a force is applied to the release section by the inserted electrical conductor to be clamped, the clamping section of the cage tension spring is displaced towards the spring bow and the holding contour is unlocked.

Description

Technical Field

[0001] The invention relates to a spring force clamping connection, which has a busbar and a cage tension spring, wherein the busbar has a clamping region. The cage tension spring has a support leg for supporting on a first side of the busbar, a spring bow connected to the support leg, and a clamping leg connected to the spring bow. The clamping leg has an actuation section connected to the spring bow and extending away from the busbar, and a clamping section bent from the actuation section and extending back toward the busbar. The clamping section has a recess, which is delimited by a cross-piece at the free end of the clamping section, wherein the busbar extends through the recess with its clamping section, and the cross-piece forms a clamping location for clamping an electrical conductor together with the clamping region of the busbar.

[0002] The invention further relates to a connecting terminal having an insulating material housing and a spring force clamping connection in the insulating material housing. Background Art

[0003] Spring force clamping connections are used to clamp an electrical conductor at a clamping point, which is formed between a clamping leg of a clamping spring and a busbar. In order to clamp the electrical conductor, the clamping spring can be pressed away from the busbar by the electrical conductor in a direct connection against the force of the clamping spring. This is possible for rigid conductors, but not for stranded or twisted conductors.

[0004] For clamping electrical conductors, there is a need to provide a spring force clamping connection that is self-retaining in an open holding position. It is usually desirable to deliver the connecting terminal with an open spring force clamping connection at the factory.

[0005] WO 2021 / 105280 A1 discloses a direct plug-in terminal for connecting an electrical line, which has a busbar and a clamping spring serving as a compression spring and a retaining spring for locking the clamping spring in an open position. Summary of the invention

[0006] Based on this, the object of the invention is to provide an improved spring force clamping connection and a connecting terminal having such a spring force clamping connection.

[0007] This object is achieved by means of a spring force clamping connection and a connecting terminal having the features of the invention. Advantageous embodiments are described in the present application.

[0008] It is proposed that the clamping section of the cage-type tension spring has a retaining contour, which is locked on the busbar or on a supporting leg supported on the busbar in the open position of the cage-type tension spring, in which the clamping point is opened by displacing the actuating section toward the supporting leg and being separated from the clamping area of ​​the busbar by a cross-piece, and the tension bow extends from an end area of ​​the clamping section of the cage-type tension spring, which end area is connected to the cross-piece delimiting the recess, wherein the tension bow extends away in the direction of wire insertion and has a release section pointing toward the busbar, and the release section is configured to displace the clamping section of the cage-type tension spring toward the spring bow and unlock the retaining contour when a force is applied to the release section by an inserted electrical wire to be clamped.

[0009] This achieves a cage-type tension spring which is locked with its clamping legs at the busbar and can be released by fully utilizing the spring elasticity of the clamping legs. The tension bow itself does not form a stop for the clamping legs but is only provided for unlocking.

[0010] The spring clamp connection provides a self-locking between the clamping section and the busbar. The tension bow serves as an auxiliary mechanism for displacing the clamping section for unlocking. This is independent of how the cage tension spring is actuated into the open position, for example by means of a pivotable actuating lever, a movable actuating lever or an actuating tool. The tension bow can be easily integrated into existing spring connection terminals as a compact separate component.

[0011] The holding contour can be formed, for example, as a negative contour by a recess or as a positive contour by a protruding web. The negative contour can be implemented as an additional hole (opening) in the clamping section. However, it is also conceivable to use the recess that is already present in the clamping section, through which the busbar is guided and for receiving the conductors, as a negative contour, so that the cross-piece forming the clamping edge forms a stop. However, a further opening can also be introduced in the extension direction of the clamping section below the recess in the cross-piece or above the recess, when viewed from the actuating section towards the free end.

[0012] However, the opening in the clamping section is not absolutely necessary. A positive holding profile is also conceivable, in which a material flange is bent out of the clamping section. Such a holding flange can be bent out of the cutout, for example, above the busbar, that is, on the upper side facing the cage tension spring or the actuating leg.

[0013] "Above the busbar" or "upper side of the busbar" is understood to mean the supporting side on which the cage tension spring is supported with its supporting legs. This is therefore the side of the busbar facing the actuating section. The "lower side of the busbar" is the clamping side opposite the upper side, to which the electrical conductors are clamped.

[0014] The release section can extend transversely to the plane of the busbar. The term "transversely" does not necessarily mean exactly 90° or perpendicular. The release section only has to be in the alignment for inserting an electrical conductor clamped to the busbar so that the electrical conductor hits the release section. The release section is preferably at an angle of 90° to the plane of the busbar with a tolerance of ±20°. For the reference point of the busbar plane, the area that is closest to the release section or toward which the release section extends is important.

[0015] The tension bow can have a release section and a lever arm section. The lever arm section can protrude from the release section and extend toward the free end of the clamping section of the clamping leg and be connected to the free end.

[0016] A “free end” is understood to mean a freely movable end region at which the clamping leg terminates.

[0017] The term "connected" is to be understood in the sense of integrally formed or joined, so that it refers to a component which is joined from two parts if necessary. The tension bow can be formed in one piece with the clamping spring and bent from the free end. However, the tension bow can also be a separate component joined to the end region. The tension bow is arranged movably (for example pivotably or displaceably) relative to the clamping leg of the clamping spring within certain limits.

[0018] The release section of the tension bow can be pivotally supported around a rotation point adjacent to the spring bow. As a result, the rotation point for the tension bow is located at a position away from the clamping leg.

[0019] The tension bow can be pivotably supported about a rotation point in the transition region from the release section to the lever arm section. Here, the release section forms a force arm to the rotation point, and the lever arm section forms a load arm of the tension bow until the rotation point.

[0020] The retaining contour of the clamping section of the cage tension spring can be a retaining tongue. The busbar can have a recess designed to accommodate the retaining tongue in the open position, wherein the delimiting walls of the recess form a stop for the retaining tongue in order to latch the clamping leg to the busbar. The cage tension spring pivoted into the open position can thereby be latched to the recess of the busbar by means of the retaining tongue.

[0021] The busbar can have a stop tongue. The clamping section of the cage tension spring can have a recess designed to accommodate the stop tongue in the open position. The delimiting wall of the recess can form a stop for the stop tongue in order to lock the clamping leg to the busbar.

[0022] The clamping area of ​​the busbar extending through the recess of the clamping section of the clamping leg can have a widened stop area, which is wider than the support area of ​​the busbar connected to the widened stop area and extending toward the spring bow. The recess can have a receiving groove, which is designed to accommodate the widened stop area. In this way, the clamping leg can be retracted into the widened holding section with its receiving groove in the open position during displacement, and the holding section can form a stop for the clamping leg for locking the clamping leg to the busbar.

[0023] The clamping area of ​​the busbar extending through the recess of the clamping section of the clamping leg can have a receiving groove. The recess of the clamping section of the clamping leg can have a retaining tongue, which is designed to sink into the receiving groove. As a result, the clamping leg can be retracted into the receiving groove with its retaining tongue in the open position during displacement. Here, the limiting wall of the receiving groove forms a stop for the retaining tongue to lock the clamping leg to the busbar.

[0024] The retaining tongue can extend from the support leg toward the clamping leg, and the clamping leg has a retaining profile. Thereby, the retaining tongue can form a stop for the retaining profile of the clamping leg, for locking the clamping leg at the support leg in the open position when the clamping leg is displaced.

[0025] The retaining contour can be, for example, a recess in the clamping leg.

[0026] The clamping leg can be spring-elastic and designed so that the clamping leg is resiliently moved into the locked position by its spring force when it is displaced into the open position. The tension bow connected to the clamping leg can be designed to unlock the clamping leg by displacing the clamping leg against its spring force when pressure is applied to the release section of the tension bow by the inserted electrical conductor.

[0027] The connecting terminal has an insulating material housing and at least one of the above-described spring force clamping connections in the insulating material housing, wherein the insulating material housing has a conductor insertion opening which leads to a release section of the release element.

[0028] The tension bow can be pivotably supported in the insulating material housing. The insulating material housing thus forms a counter-support for the pivotal support. The support can be, for example, a rotational support around a fixed axis or a floating support along a movement path.

[0029] The insulating material housing can have an actuation opening which leads toward the actuation section of the clamping leg.

[0030] The actuation opening can be designed to accommodate an actuation tool or an actuation element movably mounted in the actuation opening. An actuation tool, such as a screwdriver, can be introduced into the actuation opening, or the actuation element can be movably mounted in the actuation opening.

[0031] The operating tool or the operating element can contact the operating section of the cage tension spring in order to pivot the clamping section into the open position and lock it with the locking section. To this end, the operating section is displaced toward the support leg.

[0032] However, latching is basically independent of the type of actuation.

[0033] 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

[0034] The present invention allows for various embodiments and is described in detail below by way of example with reference to an exemplary embodiment. The accompanying drawings show:

[0035] Figure 1 A side cross-sectional view showing a first embodiment of a terminal block in a closed position;

[0036] Figure 2 Show Figure 1 A perspective view of the terminal block in FIG.

[0037] Figure 3 a side cross-sectional view showing the terminal block in an open position;

[0038] Figure 4 Show Figure 3 A perspective view of an opened terminal block in FIG.

[0039] Figure 5 A perspective view showing a cage tension spring of a first embodiment of a terminal block;

[0040] Figure 6 A perspective view showing a tension bow of a first embodiment of a terminal;

[0041] Figure 7 A side cross-sectional view showing a second embodiment of the terminal block in a closed position;

[0042] Figure 8 Show Figure 7 A perspective view of the terminal block in FIG.

[0043] Fig. 9 A side cross-sectional view showing a second embodiment of the terminal block in an open position;

[0044] Fig.10 Show Fig. 9 A perspective view of an opened terminal block in FIG.

[0045] Fig.11 A perspective view of a cage tension spring of a second embodiment of a terminal block with an integrated tension bow;

[0046] Fig.12 A side cross-sectional view showing a third embodiment of the terminal block in a closed position;

[0047] Fig.13 Show Fig.12 A perspective view of the terminal block in FIG.

[0048] Fig.14 A side cross-sectional view showing a third embodiment of the terminal block in an open position;

[0049] Fig.15 Show Fig.14 A perspective view of an opened terminal block in FIG.

[0050] Fig.16 A perspective view showing a cage tension spring of a third embodiment of a terminal block;

[0051] Fig.17 A perspective view showing a tension bow of a third embodiment of a terminal block;

[0052] Fig.18 A perspective view showing a busbar of a third embodiment of a terminal block;

[0053] Fig.19 A side sectional view showing a fourth embodiment of the terminal block in a closed position;

[0054] Fig. 20 Show Fig.19 A perspective view of the terminal block in FIG.

[0055] Fig.21 A side cross-sectional view showing a fourth embodiment of the terminal block in an open position;

[0056] Fig. 22 Show Fig.21 A perspective view of an opened terminal block in FIG.

[0057] Fig.23 A perspective view showing a cage tension spring of a fourth embodiment of a terminal block;

[0058] Fig.24 A perspective view showing a tension bow of a fourth embodiment of a terminal block;

[0059] Fig.25 A perspective view showing a busbar of a fourth embodiment of a terminal block;

[0060] Fig.26 A side cross-sectional view showing a fifth embodiment of the terminal block in a closed position;

[0061] Fig. 27 Show Fig.26 A perspective view of the terminal block in FIG.

[0062] Fig.28 A side cross-sectional view showing a fifth embodiment of the terminal block in an open position;

[0063] Fig.29 Show Fig. 27 A perspective view of an opened terminal block in FIG.

[0064] Fig.30 A perspective view showing a cage tension spring of a fifth embodiment of a terminal block;

[0065] Fig.31 A perspective view showing a tension bow of a fifth embodiment of a terminal block;

[0066] Fig.32 The schematic diagram shows a clamping leg and a busbar with a latching contour in a front view in the latched state and in the unlocked state. DETAILED DESCRIPTION

[0067] Figure 1 The side sectional view shows a first embodiment of a connecting terminal 1 in a closed position. The connecting terminal 1 has an insulating material housing 2 , into which a spring force clamping connection 3 is inserted.

[0068] The spring force clamping connection 3 has a busbar 4 and a cage tension spring 5. The cage tension spring 5 has a support leg 6, which is supported on the upper side of the busbar 4. A spring bow 7 is connected to the support leg 6, which transitions into a clamping leg 8. The clamping leg has an actuation section 9 extending away from the support leg 6 and a clamping section 10, which is bent from the distal end of the actuation section 9 away from the spring bow 7 and extends toward the support leg 6 or the busbar 4. The clamping section 10 has a recess 11, which is delimited by a crosspiece 12 and through which the busbar 4 extends.

[0069] The busbar 4 has a clamping region 13 which, as shown, can be designed as a bulge from the busbar plane. The clamping region 13 forms a clamping point together with the cross piece 12 so that the electrical conductor can be clamped to the busbar 4 between the cross piece 12 and the clamping region 13 by the force of the cage tension spring 5.

[0070] The curved clamping region 13 of the busbar 4 transitions into a free busbar end 14 which projects from a plane of the busbar 4 in a region upstream of the clamping region 13 . The busbar end 14 has a receiving opening 15 .

[0071] The clamping section 10 of the cage-type tension spring 5 has a retaining tongue 16 for forming a positive retaining contour. The retaining tongue 16 is bent out of the plane of the clamping section 10 in the direction of the extension of the busbar end 14. The retaining tongue 16 is coordinated with the receiving opening 15 in the busbar end 14 so that the retaining tongue 16 sinks into the receiving opening 15 in the open position of the cage-type tension spring 5, in which the clamping point is opened by displacement of the actuating section 9 toward the support leg 6 and by spacing from the clamping region 13 of the busbar 4 by the cross piece 12. The clamping section 10 of the cage-type tension spring 5 is thereby locked to the busbar 4 in that the distal end edge of the busbar end 14 which delimits the receiving opening 15 forms a stop for the retaining tongue 16.

[0072] In order to displace the cage tension spring 5 into the open position, the insulating material housing 2 can have an actuation opening 17. A guide wall 18 can be provided in the actuation opening 17 in order to guide an actuation tool, such as a screwdriver, inserted into the actuation opening 17 to the actuation section 9 of the cage tension spring 5. With the aid of the actuation tool, an actuation force can be exerted on the actuation section 9 toward the support leg 6 in order to displace the actuation section 9 toward the support section 6.

[0073] The spring force clamping connection 3 thus locked in the open position can now be used without further manipulation to introduce an electrical conductor into the conductor insertion opening 19 in the insulating material housing 2 to the clamping region 13. The busbar end 14 bent away from the alignment with the conductor insertion opening 19 in the busbar plane serves to guide the electrical conductor toward the clamping point.

[0074] The busbar 4 can have side walls 20 which are bent away from the busbar plane and a base 21 which projects from the side walls 20 away from the clamping region 13 .

[0075] In order to unlock the spring force clamping connection 3 locked in the open position, there is a tension bow 22 designed as a separate component, which is supported with a support section 23 at its free end facing away from the clamping section 10 on the base plate 21 of the busbar 4. The tension bow 22 is connected to the free end region of the clamping section 10 in a form-fitting manner and extends in the conductor insertion direction L away from the clamping section 10 approximately parallel to the busbar 4 toward the base plate 21. In the transition to its support section 23, that is, away from the clamping section 10 of the cage tension spring 5, the tension bow 22 has a release section 24 pointing toward the busbar 4. The release section 24 is transverse to the conductor insertion direction L, so that a release force can be applied to the release section 24 by the inserted electrical conductor, by means of which a tensile stress can be caused in the tension bow 22 and the clamping section 10 of the cage-type tension spring 5 connected to the tension bow in a form-fitting manner can be displaced toward the spring bow 7. As a result, when a force is applied to the release section 24 by the inserted electrical conductor to be clamped, an unlocking of the holding contour formed by the holding tongues 16 is caused.

[0076] It can be seen that the tension bow 22 has a lever arm section 25 connected to the release section 24, which is guided through a connection opening 26 at the free end region of the clamping section 10 and is fixed to the clamping section 10 with its widened connection end 27 in a form-fitting manner. The lever arm section 25 projects from the release section 24 toward the clamping section 10 of the cage tension spring 5 and extends toward the free end of the clamping section 10 and is connected there to the free end. As a result, a release force applied to the release section 24 in the direction of the wire insertion causes a tensile force on the clamping section 10, which pulls the clamping section 10 toward the spring bow 7 and thereby moves the retaining flange 16 out of the receiving opening 15. The movement takes place transversely to the force of the stop there, so that only a relatively small release force is required for unlocking.

[0077] The insulating material housing 2 can have a centering pin 28, wherein the cage-type tension spring 5 surrounds the centering pin 28 and is supported with its spring bow 7 on the centering pin 28. As a result, the movement of the cage-type tension spring 5 in the insulating material housing 2 is limited.

[0078] Figure 2 Show Figure 1 Perspective view of the terminal block 1 in FIG.

[0079] It can be seen that the retaining tongues 16 project from the clamping section 10 in the direction of the extension of the busbar end 14 .

[0080] In the clamped position, the cross piece 12 is supported on the busbar 4 in the clamping region 13. In the region of the cross piece 12 extending toward the free end of the clamping section 10 of the clamping leg 8, a connecting opening 26 with a T-shaped profile is introduced, into which the connecting end 27 of the lever arm section is hooked. The widened end of the connecting end 27 is introduced into the wider section of the connecting opening 26 and a positive fit is formed when the connecting end 27 is pushed into the narrower section of the T-shaped connecting opening 26.

[0081] Figure 3 The connecting terminal 1 is shown in a side section in the open position.

[0082] It is clear that the actuation section 9 is displaced toward the support leg 6 so that the cross piece 12 is spaced apart from the busbar 4. The cutout 11 is located in front of the clamping region 13 of the busbar 4 so that an electrical conductor can be inserted through the conductor insertion opening 19 and the cutout 11 in order to be supported at the clamping region 13 with its stripped end.

[0083] In the unlocked position, the retaining tongue 16 sinks into the receiving opening 15 of the busbar end 14. As a result, the cage tension spring 5 is locked on the busbar 4 and cannot be automatically pivoted back by its spring force. Figure 1 In a closed position in the clamped position or in a clamped position with a clamped electrical conductor.

[0084] The release section 24 of the tension bow 22 is positioned behind the recess 11 in the alignment line F of the conductor insertion opening 19 in the conductor insertion direction L. As a result, the inserted electrical conductor strikes the release section 24 transverse to the alignment line in order to exert a release force in the conductor insertion direction L on the tension bow 22 .

[0085] It can be seen that the tension bow 22 is connected with its connecting end 27 of the lever arm section 25 to the free end of the clamping section 10 in a form-fitting manner. By exerting a release force on the tension bow 22, the clamping section 10 can be displaced in the conductor insertion direction L toward the spring bow in order to pull the retaining tongue 16 out of the receiving opening 15 of the busbar end 14 and cancel the locking of the cage tension spring 5 on the busbar 4.

[0086] Figure 4 Show Figure 3 Perspective view of the opened terminal block 1 in FIG.

[0087] It can be seen that the clamping legs 8 are locked by the retaining tongues 16 that are sunk into the receiving openings 15. It is also clear that the cutouts 11 are arranged in the outlet of the conductor insertion openings 19 so that the edge webs that bound the cutouts 11 are positioned above the side walls 20. As a result, the electrical conductors are guided at the side walls 20 into the conductor receiving space next to the side walls 20, in which the tension bow 22 is also arranged.

[0088] Figure 5 A perspective view of a cage-type tension spring 5 of a first embodiment of a connecting terminal 1 is shown. The cage-type tension spring 5 has a support leg 6, a spring bow 7 and a clamping leg 8, wherein the clamping leg 8 is formed by an actuating section 9 and a clamping section 10. The clamping section 10 has a recess 11 which is delimited by an edge web 29 and a transverse web 12 on the narrow side facing away from the actuating section 9.

[0089] The cage tension spring 5 of the generic type is improved by the retaining tongues 16 bent out of the clamping legs 8 and the connecting openings 26 introduced into the cross piece 12 at the free end region of the clamping section 10. The connecting opening 26 is, for example, T-shaped, with a horizontal slit toward the recess 11 and a vertical slit extending therefrom toward the free end. "Horizontal" is understood to mean the direction of the width of the clamping legs 8 or the support legs 6. "Vertical" is understood to mean the longitudinal extension direction of the clamping section 10.

[0090] Figure 6 A perspective view of a release element in the form of a tension bow 22 of a first embodiment of a connecting terminal 1 is shown. The tension bow 22 is implemented as an L-shaped bent plate element. The plate element has a support section 23 at its first free end. The support section 23 has a U-shaped protrusion in the plane of the release section 24 connected thereto. The release section 24 transitions into a lever arm section 25 extending away from the plane of the release section 24 at a certain angle. The free end of the lever arm section 25 forms a connecting end with a T-shaped profile, which is configured to be connected to the likewise T-shaped connecting opening 26 of the cage tension spring 5 in a form-fitting manner. The upper horizontal web of the T-shaped connecting end 27 can be inserted into the horizontal slit of the connecting opening 26. By moving the connecting end 27 into the vertical slit of the T-shaped connecting opening 26, the edge region of the transverse web 12 that delimits the T-shaped connecting opening 26 forms a stop for the upper horizontal web of the connecting end 27. As a result, the tension bow 22 is connected to the clamping section 10 of the cage tension spring 5 in a form-fitting manner.

[0091] Figure 7 A side sectional view of a second embodiment of a terminal block 1 is shown in the closed position. It is substantially similar to the first embodiment, so that reference is made to the description above.

[0092] In contrast to the first embodiment, the tension bow 22 is formed integrally with the cage tension spring 5. The lever arm section 25 is connected to the clamping section 10 and is bent from the clamping section 10 toward the base plate 21. The lever arm section 25 extends approximately parallel to the support leg 6 and transitions into a release section 24 that is bent toward the busbar 4 and the spring bow 7.

[0093] In the closed position shown, the release section 24 can cross the busbar 4 and terminate next to the spring bow 7 .

[0094] Figure 8 Show Figure 7 1 . It can be seen that the lever arm section 25 is connected to the cross piece 12. The lever arm section is bent from the cross piece 12 and extends past the side wall 20 into the conductor receiving space. The release section 24 bent from it projects below the vertical section of the busbar 4 toward the spring bow 7, which has the clamping area 13 and transitions into the busbar end 14 bent from the plane.

[0095] Fig. 9 The side section of the second embodiment of the connecting terminal 1 is shown in the open position. It can be seen that the retaining tongues 16 sink into the receiving openings 15 at the busbar ends 14 so that the clamping section 10 is locked to the busbar 4 .

[0096] The lever arm section 25 is bent from the transverse web 12 delimiting the recess 11 and extends toward the base plate 21. At its end, the lever arm section transitions into a release section 24 bent toward the spring bow 7 and located transversely to the line insertion direction L in the alignment line F of the line insertion opening 19. As a result, an electrical line inserted into the line insertion opening 19 and guided through the recess 11 strikes the release section 24 and exerts a release force in the line insertion direction L. As a result, the clamping section 10 is displaced toward the spring bow 7 and the retaining tongue 16 is pulled out of its latching position in the receiving opening 15 and the cage tension spring 5 is unlocked.

[0097] Fig.10 Show Fig. 9 Perspective view of the opened terminal block 1 in FIG.

[0098] It can be seen that the tension bow 22 is designed integrally with the clamping section 10. It is bent from the transverse web and extends with its lever arm section 25 along the side wall 20 and ends beside the base plate 21 with a release section 24 that projects toward the spring bow.

[0099] Fig.11A perspective view of a cage-type tension spring 5 of a second embodiment of a connecting terminal 1 with an integrated tension bow 22, which forms a release element. Here, a lever arm section 25 is connected to the cross piece 12 at the end of the clamping section 10, which extends approximately parallel to (i.e. not necessarily parallel to) the support leg 6 away from the cross piece 12 and transitions into a release section 24 that projects toward the spring bow 7. In this way, the tension bow 22, which is formed integrally with the cage-type tension spring 5, does not need to be supported on the clamping leg 8 and the busbar 4, in contrast to the separate tension bow 22 of the first embodiment.

[0100] Fig.12 The third embodiment of the terminal 1 is shown in a side sectional view in the closed position. The embodiment of the release element with a separate tension bow 22 is similar to the first embodiment. Therefore, the same can be said about Figures 1 to 6 Implementation plans for this.

[0101] It can be seen that the clamping section 10 has a retaining recess 30 for forming a negative retaining contour in the region between the actuating section 9 and the recess 11 delimited by the edge web 29 . The busbar end 14 is bent toward the clamping section 10 and forms a stop tongue 31 .

[0102] Fig.13 Show Fig.12 Perspective view of the terminal block 1 in FIG.

[0103] It is clear that the stop tongue 31 projects toward the clamping section 10 of the clamping leg 8 . The clamping section 10 of the clamping leg 8 has, between the bend to the actuation section 9 and the recess 11 , a holding recess 30 , for example a square opening, for receiving the stop tongue 31 .

[0104] Fig.14 A side sectional view showing a third embodiment of the terminal block 1 in the open position, and Fig.15 Show Fig.14 Perspective view of the opened terminal block in.

[0105] It is clear that the stop tongue 31 of the busbar end 14 projects into the retaining recess 30 of the clamping section 10 and forms a stop for the clamping leg 8 . The cage tension spring 5 is thereby locked in the open position.

[0106] In the open position, the release section 24 of the tension bow 22 is positioned in the alignment line F of the conductor insertion opening 19. The electrical conductor inserted into the conductor insertion opening 19 and plugged through the recess 11 strikes the release section 24, so that the clamping section 10 is displaced toward the spring bow 7 by means of a release force. To this end, the tension bow 22 is supported by its support section 23 at its free end opposite the connection end 27 on the base plate 21. As a result, the retaining recess 30 is pulled downward out of the stop of the stop tongue 31 and the cage tension spring 5 is unlocked.

[0107] Fig.16 A perspective view of a cage tension spring 5 of a third embodiment of a connecting terminal 1 is shown. It can be seen that the retaining contour is formed with a quadrilateral retaining recess 30, for example, between the bend to the actuation section 9 and the clamping section 10. Other contours, such as circular, triangular, rectangular or polygonal openings, are also conceivable. The opening is preferably coordinated with the contour of the stop tongue 31.

[0108] Fig.17 A perspective view of a release element in the form of a tension bow 22 of a third embodiment of a connecting terminal 1 is shown. The tension bow is similar to the embodiment of the first exemplary embodiment. It is formed in an L-shaped manner by a release section 24 and a lever arm section 25 which is bent from the release section and ends in a T-shaped connection end 27.

[0109] Fig.18 A perspective view of a busbar 4 of a third embodiment of a terminal block 1 is shown. It can be seen that the busbar end 14 is bent obliquely out of a plane ending in the clamping region 13. A stop tongue 31 emerges from the busbar end 14. The stop tongue 31 extends from the plane of the busbar end 14 toward the base plate 21.

[0110] Fig.19 A side sectional view showing a fourth embodiment of the terminal block 1 in the closed position, and Fig. 20 A perspective view is shown.

[0111] On the upper edge of the side wall 20 of the busbar 4 facing the clamping section 10 , there is a latching edge 32 at the shoulder. The clamping section 10 has retaining tongues 33 projecting toward the support leg 6 at its edge region.

[0112] In this exemplary embodiment, the tension bow 22 is mounted pivotably about a rotation point in the transition region from the release section 24 to the lever arm section 25. A release force acting on the release section 24 in the conductor insertion direction L causes a movement of the connection end 27 toward the clamping section 10 in order to press the latter upwards away from the spring bow 7.

[0113] The insulating material housing 2 can have a stop 34 in the intermediate space between the tension bow 22 and the section of the busbar 4 having the clamping region 13. The stop can taper, for example, from the base plate 21 toward the clamping section 10. The stop can have, for example, a triangular contour or taper upwards in an elliptical or egg-shaped manner. As a result, the tension bow 22 can be supported against the stop 34 in the closed position and prevent the connection end 27 from slipping out of the connection opening 26.

[0114] Fig.21 A side sectional view showing a fourth embodiment of the terminal block 1 in the open position, and Fig. 22 The open connecting terminal 1 is shown in a perspective view.

[0115] It can be seen that the latching edge 32 forms a stop for the retaining tongue 33 , so that the cage tension spring 5 latches on the busbar 4 .

[0116] In the open position, the stop 34 is inactive.

[0117] Fig.23 A perspective view of a cage-type tension spring 5 of a fourth embodiment of a connecting terminal 1 is shown.

[0118] It can be seen that in the cross piece 12 with the connecting opening 26 , retaining tongues 33 are formed in the edge region, which retaining tongues project toward the support leg 6 and form projections from the plane of the clamping section 10 .

[0119] Fig.24 A perspective view of a release element in the form of an L-shaped tension bow 22 is shown for a fourth specific embodiment of the connecting terminal 1 .

[0120] It can be seen that the support section 23 of the tension bow 22 is designed as a bulge in the transition region from the release section 24 to the lever arm section 25. As a result, the L-shaped tension bow 22 can be pivotably mounted about a rotation point in the transition region.

[0121] A spring connection terminal 3 equipped with such a separate tension bow 22 can also be designed alternatively with a tension bow 22 which is formed integrally with the clamping leg 8 .

[0122] Fig.25 A perspective view of a busbar 4 of a fourth specific embodiment of a connecting terminal 1 is shown.

[0123] It can be seen that a latching edge 32 is provided on the upper edge of the side wall 20 facing the busbar end 14 . The latching edge 32 is formed by a shoulder oriented toward the vertical side edge of the side wall 20 which faces away from the clamping region 13 .

[0124] Fig.26The fifth embodiment of the connecting terminal 1 is shown in a side sectional view in the closed position, which is substantially similar to the first and fourth embodiments. Fig. 27 A perspective view of the connecting terminal is shown.

[0125] In this embodiment, the retaining contour is formed by retaining tongues 35 which protrude from the support leg 6 and are arranged below the clamping section 10 in the closed position.

[0126] Fig.28 A side sectional view showing a fifth embodiment of the terminal block 1 in the open position, and Fig.29 A perspective view shows a fifth specific embodiment of a connecting terminal in an open position.

[0127] It can be seen that the retaining tongue 35 extending from the support leg 6 in the open position extends into the retaining recess 30 of the clamping section 10 and latches there. The retaining tongue 35 extends away from the spring bow 7. The tension bow 22 is therefore mounted such that the connection end 27 for unlocking acts counter to the wire insertion direction L in order to displace the clamping section 10 away from the spring bow 7 and to move the retaining recess 30 upward away from the retaining tongue 35.

[0128] Fig.30 A perspective view of a cage-type tension spring 5 is shown in a fifth embodiment of a connecting terminal 1 .

[0129] It can be seen that at the free end of the support leg 6 opposite the spring bow 7, the retaining tongue 35 is bent out of the plane of the support leg 6 toward the actuating section 9. The retaining tongue 35 extends toward the clamping section 10. In the closed position shown, the retaining tongue is positioned below the recess 11 delimited by the cross piece 12 and the edge piece 29.

[0130] Fig.31 A perspective view of a release element in the form of a tension bow 22 is shown for a fifth specific embodiment of a connecting terminal.

[0131] It can be seen that the support section 23 of the tension bow 22 is designed as a bulge in the transition region from the release section 24 to the lever arm section 25. As a result, the L-shaped tension bow 22 can be pivotably mounted about a rotation point in the transition region.

[0132] Fig.32 The schematic diagram shows a front view of the clamping leg 8 and the busbar 4 with the latching contour in the latched state and the unlocked state.

[0133] In the exemplary embodiment, the clamping region 13 of the busbar 4 has a widened stop region 36, which extends through the recess 11 of the clamping section 10 of the clamping leg 8. The stop region 36 is wider than the support region of the busbar 4 connected to the stop region and extending toward the spring bow 7. The recess 11 has a receiving groove 37, which is designed to accommodate the widened stop region 36. When the clamping leg 8 is displaced, it springs into the widened stop region 36 with its receiving groove 37 in the open position. The widened stop region 36 forms a stop for the clamping leg 8 in this case, in order to lock the clamping leg 8 to the busbar 4.

[0134] Reference numerals list

[0135] 1 Terminal block

[0136] 2Insulating material housing

[0137] 3 Spring force clamping connection

[0138] 4 Bus

[0139] 5. Cage tension spring

[0140] 6 Support legs

[0141] 7 Spring bow

[0142] 8. Tighten your legs

[0143] 9 Control Section

[0144] 10 Clamping section

[0145] 11 Blank space

[0146] 12 Transverse joints

[0147] 13 Clamping area

[0148] 14 Busbar end

[0149] 15 Accommodate opening

[0150] 16 Holding tongue

[0151] 17 Manipulation opening

[0152] 18 Guide Wall

[0153] 19 Wire lead-in opening

[0154] 20 Sidewall

[0155] 21 bottom plate

[0156] 22 tension bow

[0157] 23 Support section

[0158] 24 Loosen section

[0159] 25 lever arm section

[0160] 26 connection openings

[0161] 27 Connection end

[0162] 28 Centering pin

[0163] 29 edge tabs

[0164] 30 Keep the space

[0165] 31 Stop tongue

[0166] 32 card lock edge

[0167] 33 Keep tongue

[0168] 34 stopper

[0169] 35 Holding tongue

[0170] 36 Widened stop area

[0171] 37 storage slots

[0172] L conductor introduction direction

Claims

1. A spring force clamping connector (3), the spring force clamping connector comprising: - a busbar (4) having a clamping region (13), and a cage-type tension spring (5) having a support leg (6) for supporting on a first side of the busbar (4), a spring bow (7) connected to the support leg (6), and a clamping leg (8) connected to the spring bow (7), wherein the clamping leg (8) has an actuation section (9) connected to the spring bow (7) and extending away from the busbar (4), and a clamping section (10) bent away from the actuation section (9) and extending back toward the busbar (4), wherein the clamping section (10) has a recess (11) which is delimited by a cross piece (12) at the free end of the clamping section (10), wherein the busbar (4) extends through the recess (11) with its clamping region (13), and the cross piece (12) together with the clamping region (13) of the busbar (4) forms a clamping point for clamping an electrical conductor, It is characterized in that The clamping section (10) of the cage tension spring (5) has a retaining contour which, in the open position of the cage tension spring (5), is latched on the busbar (4) or on the support leg (6) supported on the busbar (4), in which the clamping section (10) is opened by displacement of the actuating section (9) towards the support leg (6) and by spacing the cross piece (12) from the clamping region (13) of the busbar (4). The invention relates to a cage-type tension spring (5), wherein the tension bow (22) extends away from the clamping section (10) of the cage-type tension spring (5), the end section being connected to the cross piece (12), wherein the tension bow (22) extends away in the conductor insertion direction (L) and has a release section (24) pointing toward the busbar (4), the release section being designed to unlock the retaining contour when a force is exerted on the release section (24) by an inserted electrical conductor to be clamped.

2. The spring force clamping connection (3) according to claim 1, characterized in that The release section (24) extends transversely to the plane of the busbar (4).

3. The spring force clamping connection (3) according to claim 1 or 2, characterized in that The tension bow (22) has a release section (24) and a lever arm section (25), wherein the lever arm section (25) projects from the release section (24) and extends toward a free end of a clamping section (10) of the clamping leg (8) and is connected to the free end.

4. The spring force clamping connection (3) according to any one of claims 1 to 3, characterized in that A release section (24) of the tension bow (22) is mounted so as to be pivotable about a rotation point adjacent to the spring bow (7).

5. The spring force clamping connection (3) according to any one of claims 1 to 3, characterized in that The tension bow (22) is mounted so as to be pivotable about a rotation point which is located in the transition region from the release section (24) to the lever arm section (25).

6. The spring force clamping connection (3) according to any one of claims 1 to 5, characterized in that The retaining contour of the clamping section (10) is a retaining tongue (16), and the busbar (4) has a receiving opening (15) for receiving the retaining tongue (16) in the open position, wherein the limiting wall of the receiving opening (15) forms a stop for the retaining tongue (16) for locking the clamping leg (8) to the busbar (4).

7. The spring force clamping connection (3) according to any one of claims 1 to 5, characterized in that The busbar (4) has a stop tongue (31), and the clamping section (10) of the cage tension spring (5) has a retaining recess (11, 31) for accommodating the stop tongue (31) in the open position, wherein the limiting walls of the retaining recess (11, 31) form a stop for the stop tongue (31) for locking the clamping leg (8) to the busbar (4).

8. The spring force clamping connection (3) according to any one of claims 1 to 5, characterized in that The clamping area (13) of the busbar (4) extending through the recess (11) of the clamping section (10) of the clamping leg (8) has a widened stop area (36), which is wider than a supporting area of ​​the busbar (4) connected to the widened stop area and extending toward the spring bow (7), and the recess (11) has a receiving groove (37), which is designed to accommodate the widened stop area (36), wherein the clamping leg (8) rebounds into the widened stop area (36) with its receiving groove (37) in the open position during displacement, and the widened stop area (36) forms a stop for the clamping leg (8) for locking the clamping leg (8) to the busbar (4).

9. The spring force clamping connection (3) according to any one of claims 1 to 5, characterized in that The clamping area (13) of the busbar (4) extending through the recess (11) of the clamping section (10) has a receiving groove (15), and the recess (11) of the clamping section (10) has a retaining tongue (16), which is designed to sink into the receiving groove (15), wherein the clamping leg (8) in the open position springs into the receiving groove (15) with its retaining tongue (16) during displacement, and the limiting wall of the receiving groove (15) forms a stop for the retaining tongue (16) for locking the clamping leg (8) to the busbar (4).

10. The spring force clamping connection (3) according to any one of claims 1 to 5, characterized in that A retaining tongue (35) protrudes from the supporting leg (6) toward the clamping leg (8), and the clamping leg (8) has a retaining contour, wherein the retaining tongue (35) forms a stop for the retaining contour of the clamping leg (8) for locking the clamping leg (8) on the supporting leg (6) in the open position when the clamping leg (8) is displaced.

11. The spring force clamping connection (3) according to claim 10, characterized in that The retaining contour is a recess (30) in the clamping leg (8).

12. The spring force clamping connection (3) according to any one of the preceding claims, characterized in that The clamping leg (8) is elastic and is designed to spring into a locked position when displaced into the open position, and the tension bow (22) connected to the clamping leg (8) is designed to unlock the clamping leg (8) by displacing the clamping leg (8) against its spring force when pressure is applied by an inserted electrical conductor to a release section (24) of the tension bow (22).

13. A connecting terminal (1), comprising an insulating material housing (2) and a spring force clamping connection (3) according to any one of the preceding claims in the insulating material housing (2), wherein the insulating material housing (2) has a wire insertion opening (19) leading to a release section (24) of the release element (22).

14. The connecting terminal (1) according to claim 13, characterized in that: The tension bow (22) is pivotably mounted in the insulating material housing (2).

15. The connecting terminal (1) according to claim 13 or 14, characterized in that: The insulating material housing (2) has an actuation opening (17) which leads toward an actuation section (9) of the clamping leg (8).

16. The connecting terminal (1) according to claim 15, characterized in that The actuation opening (17) is designed to receive an actuation tool or an actuation element which is movably inserted into the actuation opening (17).

Images