Spring force clamping connection piece and connection terminal
By introducing an arched portion and a locking profile into the spring-force clamping connector, the problem of difficulty in clamping multi-strand or stranded wires in the prior art is solved, achieving simplified operation and self-holding clamping effect.
Patent Information
- Application Number
- CN202510994161.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-07-19
- Filing Date
- 2025-07-18
- Publication Date
- 2026-01-20
AI Technical Summary
Existing spring-force clamping connectors are difficult to effectively clamp multi-strand or twisted wires, and the operation is complicated when clamping and releasing the wires.
A spring-force clamping connector was designed. By setting an arch between the clamping leg and the spring bow, the operating force is transmitted through the arch to move the clamping leg to the pre-tightened position. Combined with the design of the locking profile and the retaining leg, self-holding clamping and release are achieved.
It achieves effective clamping of multi-strand or stranded wires, simplifies the operation process, and allows wires to be inserted or removed without obstruction, reducing direct operation of the clamping spring.
Smart Images
Figure CN121367086A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The invention relates to a spring force clamping connection with a busbar and a clamping spring, wherein the clamping spring has a clamping leg, a bearing leg and a spring bow, wherein the clamping leg has a clamping edge for clamping an electrical conductor to the busbar, the clamping spring is supported at the bearing leg and the spring bow connects the bearing leg with the clamping leg, wherein the clamping leg together with the busbar forms a clamping point for clamping an electrical conductor between the clamping leg and the busbar. The clamping spring can be supported at the busbar, an insulating material housing and / or other components by means of its bearing leg.
[0002] The invention also relates to a terminal with such a spring force clamping connection. BACKGROUND
[0003] The spring force clamping connection serves to clamp an electrical conductor to a clamping point, which is formed between the clamping leg of the clamping spring and the busbar. In order to clamp the electrical conductor, the clamping spring can be pressed away from the busbar by the electrical conductor against the force of the clamping spring in the case of a direct connection. This is possible with rigid conductors, but not with stranded or twisted conductors.
[0004] There is a need here for clamping electrical conductors, the spring force clamping connection to be provided in a self-holding manner in an open holding position. It is generally desirable here to deliver terminals with open spring force clamping connections on the factory side.
[0005] EP 2 768 079 B1 discloses a spring force terminal with a busbar for contacting an electrical conductor and a clamping spring for fixing the electrical conductor in the spring force terminal. A holding mechanism is provided here, which is supported at an insulating material housing or is connected with the bearing leg of the clamping spring, for latching the clamping spring in an open holding position, and a movable reset mechanism is provided for pivoting the clamping leg back into the latched state. SUMMARY
[0006] It is an object of the invention to realize an improved spring force clamping connection.
[0007] The object is achieved by a terminal with the features of the invention. Advantageous embodiments are described herein.
[0008] It is proposed that the clamping leg has a hump adjacent to the spring bow, wherein the hump constitutes a displacement of the clamping edge into a pre-tensioned position in the direction of the support leg when a force is applied to the hump. The hump serves here as a force transmission element for transmitting a manual operating force to the clamping spring in order to deflect the clamping leg into the pre-tensioned position. As a result, the clamping edge is closer to the support leg in the pre-tensioned position than in the un-pre-tensioned position. Advantageously, the hump projects somewhat outwardly at the clamping leg, so that the hump can be manually operated well by means of an operating element, for example an external tool or an operating element of the own terminal, for example an operating press or an operating lever. In particular, a perpendicular line to the apex of the hump can be oriented in the force direction in which the clamping leg is displaced in the direction of the support leg into the pre-tensioned position when a force is applied to the hump.
[0009] As a result, an operating force can be applied to the clamping leg by means of a compact, narrow construction, which allows an effective force transmission to displace the clamping leg in the direction of the support leg against the spring force of the clamping spring into the pre-tensioned position. This is achieved by a simple deformation of the clamping spring in the transition area of the clamping leg to the spring bow, which constitutes a further hump in addition to the spring bow, without additional components.
[0010] The clamping leg can directly transition into the spring bow by means of the hump, wherein the spring bow and the hump are convexly curved. As a result, two directly adjacent humps or "humps" are formed, which are arched away from the support leg and / or the busbar. The spring force of the clamping spring is provided here essentially by the spring bow. The adjacent hump provides an operating area, which is oriented by the convex curvature, so that the clamping leg is displaced in the direction of the support leg into the pre-tensioned position when a force is applied to the outside of the hump. The convex curvature is therefore understood to be a shaping in which a protrusion is produced from the space delimited by the spring bow and the clamping leg connected thereto without the hump, which increases the space delimited without the hump. As a result, the hump forms a hump in the direction away from the support leg and / or the busbar.
[0011] The clamping leg can transition into the spring bow with the aid of a hump, wherein a recess is formed between the hump and the spring bow and the recess is concavely curved and the spring bow and the hump are convexly curved. A protrusion into the space bounded by the spring bow and the clamping leg connected thereto without the hump is produced by the concavely curved recess. A favorable force direction is preset by the recess, in which the operating element exerts an operating force on the clamping leg for effectively displacing the clamping leg toward the support leg into the pre-tensioned position. A component of the operating force acting perpendicularly on the hump of the operating face pivots the hump together with the clamping leg approximately about a virtual pivot axis, which is approximately arranged in the region of the transition of the recess into the hump.
[0012] The spring force clamping connection can have a latching contour, which constitutes a latching of the clamping leg in an open holding position against the spring force of the clamping spring, which deflects the clamping leg toward the support leg. The clamping leg can thus be self-supportingly held in the open holding position in the pre-tensioned position, so that the electrical conductor can be inserted unhindered into the open clamping site between the clamping leg and the busbar or can be extracted therefrom. An operation of the clamping spring simultaneously with an operation on the electrical conductor is not necessary, which makes the operation easy.
[0013] A holding leg can be connected at the support leg, which has a latching contour, which constitutes a latching of the clamping leg in an open holding position against the spring force of the clamping spring, which deflects the clamping leg toward the support leg. The latching of the clamping leg in the pre-tensioned open position thus takes place at the holding leg. The latching of the clamping leg at the holding leg can be simply eliminated by a triggering force exerted on the holding leg by the spring elasticity, so that the clamping leg is unlocked. The clamping leg can thus be automatically displaced into the clamping position by the spring force of the clamping spring in order to clamp the electrical conductor to the busbar. The holding leg automatically springs back into the latching position after the triggering due to its spring elasticity, in which the latching of the clamping leg for a re-displacement into the open position can take place.
[0014] The holding leg can be spring- elastically molded at the support leg. The holding leg is thus integrally composed of the spring force plate material of the clamping spring. For this purpose, the holding leg can be connected to the support leg by means of a bend. The clamping spring can end on one side with a free end of the end of the clamping leg and on the opposite side with a free end of the end of the holding leg, i.e. terminate. At the free end of the end of the clamping leg, a clamping edge for clamping the electrical conductor can be present.
[0015] The holding leg can have a triggering region, wherein the triggering region is configured to be elastically deflected by an electrical conductor inserted for clamping to the busbar against the spring force of the holding leg, to move the latching contour away from the clamping leg and to unlock the clamping leg latched in the open holding position. Thus, the latching of the clamping leg at the holding leg can be automatically eliminated upon insertion of the electrical conductor to be clamped, in such a way that the inserted electrical conductor, for example by means of its end face at its free end, touches the triggering region and exerts a triggering force on the holding leg in the direction of insertion of the conductor.
[0016] The triggering region can extend transversely to the clamping leg latched at the holding leg in the open holding position. Thus, the force direction of the triggering force acting on the triggering region and the latching force acting at the latching contour are optimally oriented to each other in order to unlock not counter to the latching force, but at an angle thereto. Thus, only a reduced triggering force is required for unlocking.
[0017] The triggering region can thus form the free end of the clamping spring.
[0018] The clamping leg can taper in the case of a latching web extending towards the holding leg. The holding leg can have a latching edge, wherein the latching web engages the latching edge from behind in the open holding position and the latching edge forms a stop for the latching web for latching the clamping leg at the holding leg.
[0019] The clamping leg can taper in the case of two latching webs at the side edge region of the clamping leg. The holding leg can have two latching edges spaced apart from each other, which in the open holding position each form a stop for a respectively assigned latching web, i.e. for two latching webs. Thereby, a symmetrical latching at two latching regions is ensured, which reliably holds the clamping leg in the open holding position.
[0020] From the holding leg, at least one latching web can extend towards the direction of the arch, wherein the latching web forms a latching contour for latching the free end region of the clamping leg.
[0021] In another embodiment, it can be proposed conversely that the latching web extends from the holding leg, engages the clamping leg from below and latches with a latching edge or a latching face of the clamping leg in the open holding position of the latching. To this end, at least one latching web can extend from the holding leg towards the direction of the spring bow, wherein the latching web forms a latching contour for latching the free end region of the clamping leg.
[0022] The clamping leg can taper in the case of a latching edge and the holding leg can have a hook end curved towards the spring bow, which in the open holding position surrounds the latching edge and forms a latching contour for latching the clamping leg.
[0023] The clamping leg can taper at a side edge region of the clamping leg, in which case two latching edges are formed. The retaining leg can have two retaining arms which are spaced apart from one another and each have a hook end which is curved toward the spring bow, the hook ends surrounding each of the latching edges in the open retaining position.
[0024] The busbar can have a side or side plate, a support surface which projects laterally from the side plate for the support leg of the clamping spring supported thereon and a clamping section spaced apart therefrom for clamping the electrical conductor, wherein the clamping leg is elastically oriented toward the clamping section. The support surface can be provided at a cover plate which projects laterally from the side plate. The cover plate can have a conductor insertion opening.
[0025] The busbar can have a side or side plate only at one side and is further delimited only by the side in the region of the gap between the support surface and the clamping section.
[0026] The busbar can have a conductor insertion opening delimited by a flange, wherein the side is formed by a flange sidewall, the support surface is formed by a first flange end wall and the clamping surface with the clamping edge is formed at a second flange end wall opposite the first flange end wall.
[0027] The terminal according to the application has at least one spring force clamping connection as described above and has an insulating material housing, wherein the insulating material housing has a conductor insertion opening for introducing an electrical conductor to the clamping point of the assigned spring force clamping connection and an operating channel which opens into the clamping spring.
[0028] The operating presser can be movably arranged in the operating channel, wherein the operating presser is configured to exert a force on the arch when the operating presser is moved.
[0029] The operating presser can be connected to the clamping leg on both sides in a form-fitting manner around the clamping leg and at an upper side facing away from the busbar and at a lower side facing toward the busbar. This has the advantage that the operating presser is forced to move together with the clamping leg, so that the orientation of the clamping leg, in particular the final orientation in the pre-tensioned position or in the clamped position, is displayed by the position of the operating presser. For this purpose, the operating presser can optionally protrude from the insulating material housing in the clamped position.
[0030] The operating lever can be pivotably arranged in the operating channel, wherein the operating lever is configured for force loading of the arch when the operating lever is pivoted.
[0031] The clamping leg can transition into the spring bow with the aid of a hump, wherein a recess is formed between the hump and the spring bow. The recess can be concavely curved, while the spring bow and the hump are convexly curved opposite the recess. The operating lever can sink into the recess here. The operating lever can thus be guided in the recess in order to load the hump, which is concavely curved outward at the connection to the recess, from its starting position. An advantageous force direction is thus preset, along which the operating lever exerts an operating force on the clamping leg for displacing the clamping leg toward the support leg into the pre-tensioned position.
[0032] The operating lever can have a recess into which the spring bow connected to the convexly curved hump or the convexly curved hump sinks. The operating lever thus presses into the hump that is sunk into the recess or onto the hump connected to the spring bow that is sunk into the recess when it is operated in order to force-load the clamping spring, especially when it is pivotably supported, in order to open the clamping leg.
[0033] The conductor lead-in opening of the insulating material housing can be opened and oriented toward the holding leg such that an electrical conductor leaded into the conductor lead-in opening comes into contact with the holding leg and displaces the holding leg in order to unlock the clamping leg that is latched at the latching contour in the open holding position. The inserted electrical conductor is thus optimally guided to the holding leg, especially to the triggering region of the holding leg, in order to unlock the clamping leg that is held in the pre-tensioned open holding position by a triggering force on the holding leg.
[0034] In general, in the context of the present application, the word "a" should not be understood as the numerical word unless explicitly defined differently. BRIEF DESCRIPTION OF DRAWINGS
[0035] The present application allows various embodiments and is elucidated hereinafter by way of example with the aid of the drawings. The drawings show:
[0036] Figure 1 a perspective view showing a first embodiment of a terminal with an operating lever and a spring force clamping connection in a clamping position;
[0037] Figure 2 a top view showing the terminal in Figure 1 with the section line A-A;
[0038] Figure 3 a side sectional view showing the terminal in Figure 1 with the section A-A;
[0039] Figure 4 a side view showing the terminal in Figure 1 ; and
[0040] Figure 5 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon;
[0041] Figure 6 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon;
[0042] Figure 7 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon; Figure 1 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon;
[0043] Figure 8 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon; Figure 7 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon;
[0044] Figure 9 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon; Figure 7 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon;
[0045] Figure 10 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon; Figure 8 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon;
[0046] Figure 11 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon; Figure 10 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon;
[0047] Figure 12 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon;
[0048] Figure 13 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon; Figure 12 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon;
[0049] Figure 14 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon; Figure 12 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon;
[0050] Figure 15 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon; Figure 12 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon;
[0051] Figure 16 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon; Figure 12 perspective view of the spring force clamping connection in the clamped position with the operating lever arranged thereon;
[0052] Figure 17Spring force clamping connection in a clamping position Figure 12
[0053] Figure 18 Spring force clamping connection in a clamping position Figure 12
[0054] Figure 19 Spring force clamping connection in a clamping position Figure 18
[0055] Figure 20 Spring force clamping connection in a clamping position Figure 18
[0056] Figure 21 Spring force clamping connection in a clamping position Figure 18
[0057] Figure 22 Spring force clamping connection in a clamping position Figure 21
[0058] Figure 23 Spring force clamping connection in a clamping position
[0059] Figure 24 Spring force clamping connection in a clamping position Figure 23
[0060] Figure 25 Spring force clamping connection in a clamping position Figure 23
[0061] Spring force clamping connection in a clamping position Figure 26 Figure 23 DETAILED DESCRIPTION
[0062] Figure 1 Spring force clamping connection in a clamping position
[0063] Spring force clamping connection in a clamping position
[0064] The terminal 1 has an insulating material housing 7 with a conductor introduction opening 8 which opens into the busbar 4. Next to the conductor introduction opening 8, an operating channel 9 is provided in the insulating material housing 6 in which the operating lever 2 is pivotably accommodated. The operating lever 2 can have support pins 10 on both sides which project in opposite directions and which sink into support openings 11 in order to support the operating lever 2 at the insulating material housing 7 at the pivot bearing formed by the support pins 10 and the support openings 11.
[0065] The operating channel 9 can transition into an inspection opening 12 which opens into the clamping spring 5. Thus, an inspection tool can be inserted into the inspection opening 12 in order to contact the clamping spring 5 and to measure the electrical potential or electrical signal applied at the spring force clamping connection 3.
[0066] The clamping spring 5 has a hump 13 which transitions into a clamping leg 6 and which can be loaded with an operating force by the operating lever 2 when it is pivoted.
[0067] The conductor introduction opening 8 is oriented in alignment with a conductor receiving recess 14 of the insulating material housing 7. The clamping spring 5 has a holding leg 15 with a triggering region 16 which extends into the conductor receiving recess 14.
[0068] Figure 2 A top view of the terminal 1 in Figure 1 is shown with the section line A-A.
[0069] At the upper side of the terminal, the operating lever 2 projects from the operating channel 9. The operating channel 9 is located between the inspection opening 12 and the conductor introduction opening 8. The inspection opening 12 can be configured as a recess at the end side of the operating channel 9 which transitions into the operating channel 9.
[0070] Figure 3 and Figure 4 A side view and a side view in the section A-A of the terminal 1 in Figure 1 are shown.
[0071] It can be seen that the operating channel 9 is separated from the conductor introduction opening 8 by a partition wall 17. The operating lever 2 has a cylindrical swivel body 18 which is rotatably supported in a correspondingly curved recess of the insulating material housing, in particular at the transition of the partition wall 17 and the oppositely located operating channel 9 into the inspection opening 12. A lever arm 19 projects from the swivel body 18 which projects from the insulating material housing 7.
[0072] The clamping spring 5 has a bearing leg 20 which is supported in the insulating material housing 7 between an inner wall 21 of the insulating material housing 7 and a spring bearing 22. The bearing leg 20 extends through a conductor insertion opening 23 of the busbar 4 and transitions with a bend into a holding leg 15. The holding leg 15 has a holding section 24 which projects approximately transversely to the bearing leg 20 and transitions after the bend into a connecting section 25. From the connecting section 25, the triggering section 16 extends after a further bend into the median axis F of the conductor introduction opening 8.
[0073] The connecting section 25 is located between a guide section 26 which projects into the conductor receiving recess 14 and a delimiting wall 27 of the conductor receiving recess 14. The guide section 26 can have an inclined face 28. This constitutes a guide for the electrical conductor into the triggering region 16 by means of the inclined face 28 when the electrical conductor enters the conductor introduction opening 8 in the direction of the median axis F and is inserted through the conductor insertion opening 23 into the conductor receiving recess 14.
[0074] The clamping leg 6 has a clamping edge 29 at its free end which, in the clamping position shown, lies against a clamping section 30 in the absence of an inserted electrical conductor, the clamping section 30 projecting from the conductor insertion opening 23 of the busbar 4 and into the conductor receiving recess 14.
[0075] At the bearing leg 20, on the side opposite the holding leg 15, a spring bow 31 is connected. The spring bow 31 is connected to the clamping leg 6 via a recess 32 and the arch 13.
[0076] It can be seen that the spring bow 31 and the arch 13 are curved or arched convexly in the direction of the operating channel 9 and the operating lever 2 supported there. The recess 32 arranged between the spring bow 31 and the arch 13 is curved concavely into the space enclosed by the bearing leg 20, the spring bow 31, the arch 13 and the clamping leg 6.
[0077] The swivel body 18 of the operating lever 2 can have a recess into which the arch 13 partially sinks in the unoperated clamping position. An operating finger 34 is thus provided in the transition between a partially circular curved bearing section 35 of the swivel body 18 and the recess 33, which sinks into the recess 32 and can exert an operating force on the clamping spring 5 in the transition between the recess 32 and the arch 13.
[0078] The busbar 4 can have a cover plate 36 and a side plate 37 which projects transversely therefrom. The conductor insertion opening 23 is introduced into the cover plate 36.
[0079] Figure 5perspective side view showing the spring force clamping connection 3 in the clamping position together with the operating lever 2 arranged thereon.
[0080] It can be seen that the rotating body 18 of the operating lever 2 sinks with its operating finger 34 into the recess 32 of the clamping spring 5. The convexly curved arch 13 projects into the recess 33 of the rotating body 18. The rotating body 18 has a bearing pin 10 projecting from its side.
[0081] The wire insertion opening 23 in the cover plate 36 of the busbar 4 tapers towards the bearing leg 20 into the holding slot 38. The bearing leg 20 projects into the holding slot 38 with a correspondingly tapered bearing section 39 and abuts at an end wall 40 delimiting the holding slot 38. In the transition to the tapered bearing section 39, end faces 41 are present on both sides, which bear on the cover plate 36.
[0082] Figure 6 perspective front view showing the spring force clamping connection 3 in the clamping position together with the operating lever 2 arranged thereon.
[0083] A latching connection plate 42 projects from the clamping leg 6, which latches with a latching edge at the holding section 24 of the holding leg 15 and forms a latching contour together with the holding section.
[0084] Furthermore, the clamping leg 6 can taper from the arch 13 towards the free end, viewed in front of the root region of the latching connection plate 42, wherein an overload tab 43 is thereby formed, which can bear on a side tab 44 of the cover plate 36 delimiting the wire insertion opening 23 when the operating lever 2 displaces the arch 13 together with the clamping leg 6 connected thereto towards the cover plate 36 and towards the bearing leg 20.
[0085] It is clear that the bearing leg 20 extends through the holding slot 38 with its narrower bearing section 39 and bears on the cover plate 36 of the busbar 4 with its end faces 41 on both sides.
[0086] The clamping leg 6, starting from the root region of the latching connection plate 42, curves away from the bearing leg 20 and towards the clamping section 30 out of the plane formed by the clamping leg 6 in the region of the transition to the arch 13 up to the free end of the latching connection plate 42.
[0087] Figure 7 perspective view showing the spring force clamping connection 3 with the operating lever 2 and in the pre-tensioned, open holding position of the wire connection terminal 1 according to the first embodiment. Figure 1 perspective view showing the spring force clamping connection 3 with the operating lever 2 and in the pre-tensioned, open holding position of the wire connection terminal 1 according to the first embodiment.
[0088] It can be seen that the operating lever 2 now bears with its rotating body 18 on the clamping spring 5. Figure 1compared to the pivot. Thereby, an operating force is applied to the arch 13, which displaces the clamping leg 6 towards the bearing leg 20.
[0089] Figure 8 a side sectional view of the terminal 1 in Figure 7 and Figure 9 a side sectional view of the terminal 1 in Figure 7 is shown.
[0090] The operating finger 34 applies an operating force to the arch 13, which displaces the arch 13 with the clamping leg 6 connected thereto about a virtual pivot axis located approximately in the region of the recess 32 to the holding section 24 of the bearing leg 20 and the holding leg 15. The arch 13 is designed such that a perpendicular line on the apex of the arch 13 points to the bearing leg 20 or to the holding section 24 in the transition to the bearing leg 20 and is thus oriented in the force direction, which displaces the clamping leg into the shown pre-tensioned position upon force loading of the arch 13.
[0091] It is further visible that the electrical conductor 45 is inserted into the conductor insertion opening 8 with its stripped end and through the conductor insertion opening 23 into the conductor receiving recess 14. The electrical conductor 45 is guided here from the guide section 26 towards the triggering region 16 of the holding leg 15 and kept away from the connection section 25. Thus, a triggering force is applied to the triggering section 16 by the electrical conductor 45 in the longitudinal extension direction of the electrical conductor 45, which displaces the holding section connected to the triggering section 16 via the connection section 25 away from the plane of the cover plate 36 and the operating lever 2. Thus, the latching of the clamping leg 6 at the holding leg 15 by the latching connection plate 42 form-fittingly resting against the latching edge 49 of the holding leg 15 is released and the clamping leg 6 is unlocked. The clamping leg 6 can then be displaced with its free end by the spring force stored in the spring bow 31 of the clamping spring 5 towards the clamping section 30 in order to clamp the electrical conductor 45 between the clamping edge 29 and the clamping section 30.
[0092] Figure 10 a perspective side view of the spring force clamping connection 3 in Figure 8 in the open holding position together with the operating lever 2 arranged thereon and the inserted electrical conductor 45. In a corresponding manner, Figure 11 a perspective front view of the spring force clamping connection 3 in Figure 10 in the open holding position together with the operating lever 2 arranged thereon and the inserted electrical conductor 45.
[0093] It is clear that the operating finger 34 of the operating lever 2 displaces the arch 13 in the direction of the cover plate 36 of the busbar 4. Here, the clamping leg 6 is displaced towards the support leg 20 and is latched at the retaining leg 15. The direction of movement of the clamping leg 6 is determined by the arch 13 and the transition to the recess 32, since the operating finger 34 sinks into the recess 32 and the operating force is exerted on the arch 13 in the transition region between the recess 32 and the arch 13 or adjacent thereto and the perpendicular on the apex of the arch 13 points approximately to the transition region between the support leg 20 and the retaining leg 15.
[0094] Figure 12 A perspective view of a second embodiment of the terminal 1 with an operating presser 46 movably arranged in the operating channel 9 and the previously described spring force clamping connection 3 in the clamping position is shown.
[0095] It can be seen that the operating presser 46 has a tool holding contour 47, for example a recess and / or recesses, on its end side. Thus, an operating tool can be placed onto the end side without the operating tool slipping off in order to displace the operating presser 46 towards the busbar 4 in order to exert an operating force on the arch 13.
[0096] Figure 13 A top view of the terminal 1 in Figure 12 with the section line A-A is shown.
[0097] It is clear that the end side of the operating presser 46 with the tool holding contour 47 is accessible from the upper side of the insulation material housing 2.
[0098] Figure 14 A side sectional view of the terminal 1 in Figure 12 in the section A-A is shown and Figure 15 a side view of the terminal 1 in Figure 12 is shown.
[0099] The operating presser 46 is placed on the arch 13 by means of an operating face and is surrounded by a retaining piece 48 which is connected form-fittingly to the clamping spring 5. The clamping spring 5 is movably accommodated between a pin of the retaining piece 48 and the operating face by means of the arch 13. The retaining piece 48 prevents the operating presser 46 from moving independently of the clamping spring 5 and in particular from falling out of the insulation material housing 7.
[0100] The construction of the spring force clamping connection 3 corresponds to the previously described embodiments, so that reference is made to the foregoing.
[0101] Figure 16 A perspective side view of the terminal 1 in Figure 12 with the spring force clamping connection 3 in the clamping position together with the operating presser 2 arranged thereon is shown.Figure 17 spring force clamping connection 3 in the clamped position Figure 12 corresponding perspective front view of the spring force clamping connection 3 in the clamped position with the operating presser 2 arranged thereon.
[0102] The operating presser 46 surrounds the clamping spring 5 in the region of the recess 32 and the adjoining arch 13 by means of its holder 48. To this end, the holder 48 has at least one holding wall which guides past the edge rim of the clamping spring 5 and has a holding pin which projects from the at least one holding wall.
[0103] Figure 18 perspective front view of the spring force clamping connection 3 with the operating presser 2 and in the pre-tensioned, open holding position Figure 12 perspective view of a second embodiment of the terminal block 1 in Figure 19 perspective view of the terminal block 1 in Figure 18 side cut view of the terminal block 1 in Figure 20 perspective view of the terminal block 1 in Figure 18 side view of the terminal block 1 in
[0104] It can be seen that the operating presser 46 is displaced towards the busbar 4 and presses the arch 13 by means of its operating face in the direction of the cover plate 36 of the busbar 4. As a result of this, the arch 13 together with the clamping leg 6 connected thereon is displaced in the direction of the bearing leg 20 in order to open the clamping point between the clamping rim 29 and the clamping section 30.
[0105] In the final position of the latching, the holder 48 is placed by means of its pin on the spring bearing 22 which in this way serves as overload protection in order to delimit the movement path of the operating presser 46.
[0106] Figure 21 perspective front view of the spring force clamping connection 3 with the operating presser 2 and in the pre-tensioned, open holding position Figure 18 perspective side view of the terminal block 1 in
[0107] It can be seen that, when placing the measuring rod, the arch 13 lies in the open holding position approximately parallel to the plane of the cover plate 36, whereas the arch 13 in the clamped position is further away from the plane of the cover plate 36, so that the measuring rod placed on the spring bow 31 and the arch 13 in the clamped position according to Figure 16 lies on a plane which is inclined to the plane of the cover plate 36.
[0108] Figure 22 perspective front view of the spring force clamping connection 3 with the operating presser 2 and in the pre-tensioned, open holding position Figure 21 perspective front view of the spring force clamping connection 3 with the operating presser 2 and in the pre-tensioned, open holding position
[0109] It can be seen that the latching connection plate 42 latches at the latching edge 49 of the retaining leg 15.
[0110] Figure 23 Perspective view of the clamping spring 5 of the spring force clamping connection 3 of the embodiment of the terminal 1 in the clamped position.
[0111] It can be seen that the clamping leg 6 is connected to the arch 13 and forms a first plane on which the latching connection plate 42, which projects from the clamping leg 6, is also placed. The latching connection plate 42 is formed by cutting off an end section of the clamping leg 6 that is curved away from the first plane, which is narrower in the curved region and becomes wider again by virtue of its end having the clamping edge 29. The latching connection plate 42 emerges from the plate material of the clamping leg at two edge regions.
[0112] Viewed from the arch, the clamping leg 6 tapers in the region before the root region of the latching connection plate 42, so that an overload tab 43 is formed in a step.
[0113] It can also be seen that the bearing leg 20 tapers towards the bearing section 39, so that an end face 41 is formed in a step on both sides for bearing the clamping spring 5 on the busbar 4. The bearing section 39 transitions after a bend of approximately 90° into the retaining section 24, which widens in the region of a further obtuse bend by forming the latching edge 49 in a step and transitions after the bend into the connection section 25. The connection section 25 transitions by means of a further obtuse bend into the triggering region 16, which extends approximately parallel to the retaining section 24. The free end of the triggering region 16 can be bent upwards towards the plane of the retaining section 24 in order to form a guide for the free end of the electrical conductor 45 that strikes against the triggering region 16.
[0114] Figure 24 Perspective view of the clamping spring of the terminal 1 in the pre-tensioned and latched open retaining position. Figure 23
[0115] It can be seen that the clamping leg 6, which is displaced in the direction of the bearing leg 20, engages the latching edge 49 of the retaining leg 15 from behind by means of its latching connection plate 42. The latching connection plate 42 latches in this way at the latching edge 49.
[0116] If a triggering force is now applied to the triggering face 16, the retaining section 24 is displaced, in particular in the region of the bend to the connection section 25, so that the latching edge 49 slides at the latching connection plate 42 and the latching is eliminated. For this, only a short unlocking path and a small triggering force are required, which overcomes the frictional force between the latching connection plate 42 and the latching edge 49. The frictional force is small due to the small frictional surface.
[0117] Figure 25 schematic perspective view of the clamping spring 5 in the clamping position Figure 23 schematic perspective view of the clamping spring 5 in the clamping position
[0118] It can be seen that the clamping leg 6 is unlocked from the holding leg 15 and is displaced away from the bearing leg 20 by the spring force stored in the spring bow 31.
[0119] Figure 26 schematic perspective view of the clamping spring 5 in the clamping position Figure 23 schematic perspective view of the clamping spring 5 in the clamping position
[0120] The clamping leg 6, which is displaced towards the bearing leg 20, is latched at the holding leg 15 here by means of the latching connection plates 42 on its two sides in such a way that the narrower holding section 24 sinks into the gap of the latching connection plate 42 and the latching connection plate 42 latches at the latching edge 49 in the region of the curved section to the connecting section 25 in the stepped transition of the broadening of the holding section 24. The provision of the latching edge 49 in the region of the curved section is optional and has the advantage that the holding leg 15 is reinforced by the curved section in said region of the latching contour.
[0121] List of reference signs
[0122] 1 terminal
[0123] 2 operating lever
[0124] 3 spring force clamping connection
[0125] 4 busbar
[0126] 5 clamping spring
[0127] 6 clamping leg
[0128] 7 housing of insulating material
[0129] 8 lead introduction opening
[0130] 9 operating channel
[0131] 10 bearing pin
[0132] 11 bearing opening
[0133] 12 inspection opening
[0134] 13 arch
[0135] 14 lead receiving recess
[0136] 15 holding leg
[0137] 16 trigger region
[0138] 17 partition wall
[0139] 18 rotating body
[0140] 19 lever arm
[0141] 20 support leg
[0142] 21 inner wall
[0143] 22 spring support
[0144] 23 wire insertion opening
[0145] 24 holding section
[0146] 25 connecting section
[0147] 26 guide section
[0148] 27 delimiting wall
[0149] 28 inclined surface
[0150] 29 clamping edge
[0151] 30 clamping section
[0152] 31 spring bow
[0153] 32 recess
[0154] 33 recess
[0155] 34 operating finger
[0156] 35 support section
[0157] 36 cover plate
[0158] 37 side plate
[0159] 38 holding slot
[0160] 39 support section
[0161] 40 end wall
[0162] 41 end face
[0163] 42 latching connection plate
[0164] 43 overload tab
[0165] 44 side tab
[0166] 45 electrical line
[0167] 46 operating press
[0168] 47 tool holding contour
[0169] 48 holder
[0170] 49 detent edge
[0171] F center axis
Claims
1. Spring force clamping connection (3) having a busbar (4) and a clamping spring (5), wherein the clamping spring (5) has a clamping leg (6), a bearing leg (20) and a spring bow (31), wherein the clamping leg has a clamping edge (29) for clamping an electrical conductor to the busbar (4), the clamping spring (5) is supported at the bearing leg and the spring bow connects the bearing leg (20) with the clamping leg (6), wherein the clamping leg (6) together with the busbar (4) forms a clamping point for clamping an electrical conductor between the clamping leg (6) and the busbar (4), characterized in that the clamping leg (6) has an arch (13) adjacent to the spring bow (31), wherein the arch (13) constitutes a displacement for displacing the clamping edge (29) in the direction of the bearing leg (20) into a pre-tensioned position upon force loading of the arch (13).
2. Spring force clamping connection (3) according to claim 1, characterized in that the clamping leg (6) transitions directly into the spring bow (31) by means of the arch (13), wherein the spring bow (31) and the arch (13) are convexly curved.
3. Spring force clamping connection (3) according to any of the preceding claims, characterized in that the arch (13) forms a hump arranged in the direction away from the bearing leg (20) and / or the busbar (4).
4. Spring force clamping connection (3) according to any of the preceding claims, characterized in that the clamping leg (6) transitions into the spring bow (31) by means of the arch (13), wherein a recess (32) is formed between the arch (13) and the spring bow (31), the recess (32) is concavely curved and the spring bow (31) and the arch (13) are convexly curved, so that a protrusion from a space bounded by the spring bow (31) and the clamping leg (6) without arch (13) is generated by the recess (32).
5. Spring force clamping connection (3) according to any of the preceding claims, characterized in that the spring force clamping connection (3) has a latching contour (42, 49) which constitutes a latching of the clamping leg (6) deflected against the spring force of the clamping spring (5) towards the bearing leg (20) in an open holding position.
6. Spring force clamping connection (3) according to claim 5, characterized in that a holding leg (15) is connected at the bearing leg (20), the holding leg having a latching contour (49) which constitutes a latching of the clamping leg (6) deflected against the spring force of the clamping spring (5) towards the bearing leg (20) in an open holding position.
7. Spring force clamping connection (3) according to claim 6, characterized in that The holding leg (15) is elastically molded at the bearing leg (20).
8. Spring force clamping connection (3) according to claim 6 or 7, characterized in that The holding leg (15) has a triggering region (16), wherein the triggering region (16) is designed such that it is elastically deflected by the spring force of the holding leg (15) against the insertion of an electrical conductor wire for clamping at the busbar (4), so that the latching contour (49) is moved away from the clamping leg (6) and the clamping leg (6) is unlocked, which is latched in the open holding position.
9. Spring force clamping connection (3) according to claim 8, characterized in that The triggering region (16) forms the end of the clamping spring (5).
10. Spring force clamping connection (3) according to claim 8 or 9, characterized in that The triggering region (16) extends transversely to the clamping leg (6), which is latched at the holding leg (15) in the open holding position.
11. Spring force clamping connection (3) according to one of claims 6 to 10, characterized in that The clamping leg (6) tapers in the region of a latching web (42), which projects towards the holding leg (15), and the holding leg (15) has a latching edge (49), wherein the latching web (42) engages the latching edge (49) from behind in the open holding position and the latching edge (49) forms a stop for the latching web (42) for latching the clamping leg (6) at the holding leg (15).
12. Spring force clamping connection (3) according to claim 11, characterized in that The clamping leg (6) tapers in the region of two latching webs (42) at the side edge regions of the clamping leg (6), and the holding leg (15) has two latching edges (49), which are spaced apart from one another, each forming a stop for the latching web (42) in the open holding position.
13. Spring force clamping connection (3) according to one of claims 6 to 10, characterized in that At least one latching web (42) projects from the holding leg (15) in the direction of the spring bow (31), wherein the latching web forms a latching contour for latching a free end region of the clamping leg (6).
14. Spring force clamping connection (3) according to claim 13, characterized in that The clamping leg (6) tapers in the region of a latching edge, and the holding leg (15) has a hook end, which is curved towards the spring bow (31), wherein the hook end surrounds the latching edge in the open holding position and forms the latching contour for latching the clamping leg (6).
15. Spring force clamping connection (3) according to claim 14, characterized in that The clamping leg (6) tapers at a side edge region of the clamping leg (6) in the case of two latching edges, and the retaining leg (15) has two retaining arms spaced apart from one another, which each have a hook end bent toward the spring bow (31), which in the open retaining position each surround one of the latching edges.
16. Spring force clamping connection (3) according to one of Claims 6 to 15, characterized in that at least one latching web projects from the retaining leg (15) in the direction of the arch (13), wherein the latching web forms a latching contour for latching the free end region of the clamping leg (6).
17. Spring force clamping connection (3) according to one of the preceding claims, characterized in that the busbar (4) has a side plate (37), a cover plate (36) extending transversely from the side plate (37), a conductor insertion opening (23) in the cover plate (36), and a clamping section (30) for clamping electrical conductors extending from an end wall of the conductor insertion opening (23), wherein the clamping leg (6) is elastically oriented toward the clamping section (30), the cover plate serving as a support for the support leg (20) of the clamping spring (5) bearing thereon.
18. Spring force clamping connection (3) according to Claim 17, characterized in that the busbar (4) has a side plate (37) only at one side and is delimited only by the side plate (37) in the region of the gap between the cover plate (36) and the clamping section (30).
19. Spring force clamping connection (3) according to one of Claims 1 to 17, characterized in that the busbar (4) has a conductor insertion opening (23) delimited by a flange, wherein the side plate (324) is formed by a flange side wall, a support surface for the support leg (20) is formed by a first end wall (40) of the flange, and the clamping section (30) is formed at a second flange end wall opposite the first flange end wall.
20. Terminal (1) having a spring force clamping connection (3) according to one of the preceding claims and an insulating material housing (2), wherein the insulating material housing (2) has a conductor introduction opening (8) for introducing electrical conductors to a clamping point and an operating channel (9) leading to the clamping spring (5).
21. Terminal (1) according to Claim 20, characterized in that an operating presser (46) is movably arranged in the operating channel (9), wherein the operating presser (46) is configured for force loading of the arch (13) when the operating presser (46) is moved.
22. Terminal (1) according to Claim 21, characterized in that The operating press piece (46) surrounds the clamping spring (5) and is connected form-fittingly on both sides at the upper side facing away from the busbar (4) and at the lower side facing towards the busbar (4).
23. The terminal (1) according to claim 20, characterized in that An operating lever (2) is arranged pivotably in the operating channel (9), wherein the operating lever (2) is configured for force loading of the arch (13) when pivoting the operating lever (2).
24. The terminal (1) according to claim 23, characterized in that The clamping leg (6) transitions into the spring bow (31) by means of an arch (13), wherein a recess (32) is formed between the arch (13) and the spring bow (31) and the recess (32) is concavely curved and the spring bow (31) and the arch (13) are convexly curved and the operating lever (2) sinks into the recess (32).
25. The terminal (1) according to one of the claims 23 to 24, characterized in that The operating lever (2) has a recess (33) into which the spring bow (31) connected to the convexly curved arch (13) or the convexly curved arch (13) sinks.
26. The terminal (1) according to one of the claims 20 to 25, characterized in that The conductor introduction opening (8) opens and is oriented towards the holding leg (15) such that an electrical conductor introduced into the conductor introduction opening (8) can come into contact with the holding leg (15) and displace the holding leg in order to unlock the clamping leg (6) latched in the open holding position at the latching contour (49).