Spring force clamping connection piece and connection terminal

Abstract

The invention relates to a spring-loaded clamping connection for clamping an electrical conductor, comprising a clamping spring, which has a supporting leg, a clamping leg, which has a clamping edge for clamping the electrical conductor, and a main spring bow, which connects the supporting leg to the clamping leg.

Description

Technical Field

[0001] This invention relates to a spring-force clamping connector for clamping electrical wires, the spring-force clamping connector having a clamping spring having a support leg, a clamping leg and a main spring bow, the clamping leg having a clamping edge for clamping electrical wires, and the main spring bow connecting the support leg and the clamping leg. Background Technology

[0002] Spring-force clamping connectors for clamping electrical wires are known in various forms.

[0003] DE 20 2011 102 996 U1 illustrates a spring-force clamping contact having a busbar element and a clamping spring. The spring bow of the clamping spring has a material recess extending in the longitudinal direction of the spring plate or a slit that completely penetrates the spring plate. This increases the bending radius of the clamping spring and improves its characteristics.

[0004] DE 10 2015 107 055 B3 discloses a terminal block comprising: an insulating housing having a wire inlet opening for introducing an electrical conductor and a contact pin inlet opening for introducing a contact pin; a clamping spring having a clamping leg, a spring bow, and a support leg; and a busbar having a through opening for receiving a contact pin and configured to clamp an electrical conductor between the clamping leg and a transverse tab of the busbar. The support leg is slit in its extending direction from the spring arm toward the spring bow. Therefore, the support leg has a slit extending into the spring bow, dividing the support leg into two side-by-side leg arms disposed on the same plane. This not only creates free space between the spring arms in the support leg, but also transitions into the slit, which is transverse to the extending direction of the support leg, increasing the spring force of the support leg. The slit can extend into the spring bow. This increases the usable spring arm length and improves the resulting spring characteristics. Furthermore, the spring action of the clamping spring is improved by the spring bow with a slit, which also improves the spring characteristics of the clamping leg. Summary of the Invention

[0005] The object of this invention is to realize a further improved spring-force clamping connector and a terminal block having such a spring-force clamping connector.

[0006] The objective is achieved by the spring force clamping connector and terminal block of the present invention. Advantageous embodiments are described herein.

[0007] It is proposed that, in addition to the main spring bow, the clamping spring has an additional spring bow, which is constructed from the same material as the clamping spring in one piece and extends from the support leg toward the clamping leg, wherein the free end of the additional spring bow is positioned on the side of the clamping leg toward the support leg.

[0008] An additional spring bow extends from the support leg, applying additional spring force to the clamping leg and increasing the resulting spring force. This additional spring bow is positioned on the clamping leg extending from the main spring bow. This is achieved simply and reliably through a one-piece integrated additional spring.

[0009] Not only the main spring bow but also the auxiliary spring bow are formed in an arc shape, meaning that both the main and auxiliary spring bows have a certain curvature in their longitudinal extension. According to an advantageous design of the invention, the curvature of the auxiliary spring bow can differ from that of the main spring bow. For example, the radius of the auxiliary spring bow can differ from the radius of the main spring bow. Thus, the auxiliary spring bow has different spring characteristics and acts on the clamping leg at an angle different from that of the main spring bow. The auxiliary spring bow can, for example, bend more strongly or less strongly than the main spring bow. If the auxiliary spring bow bends with a uniform curvature in its arc shape, i.e., with a constant radius of curvature, then the radius of curvature can form a measure of curvature. If the radius of curvature varies along the arc extension of the auxiliary spring bow, then the average radius of curvature can, for example, be used as a measure of curvature.

[0010] The distance between the additional spring bow and the clamping edge can be set differently from the distance between the main spring bow and the clamping edge. The additional spring bow is not simply achieved through a slit in the main spring bow, which would disadvantageously weaken the main spring bow. Instead, the additional spring bow is guided to the clamping leg on a different plane relative to the apex of the main spring bow to load the clamping leg.

[0011] The additional spring bow can be offset from the main spring bow in the width direction. Thus, the additional spring bow can be laterally positioned in the width direction next to the main spring bow and the clamping leg connected to the main spring bow. The additional spring bow can be cut from the material of the clamping spring located beside the main spring bow in the width direction and guided to the clamping leg so as to abut against the clamping leg.

[0012] Alternatively or additionally, the additional spring bow can be arranged at a height offset relative to the main spring bow. For example, the additional spring bow can be arranged at a height offset relative to the apex of the main spring bow. Here, the apex of the additional spring bow can advantageously be arranged closer to the plane containing the free end of the support leg, the free end of the clamping leg, and / or the clamping part of the busbar than the apex of the main spring bow.

[0013] The additional spring bow can be formed by a pair of spring bows extending from opposite edge regions of the support leg and engaging on both sides below force-absorbing tabs or other material lugs extending from the clamping leg. In this way, the clamping leg can be symmetrically supported by the additional spring bows acting on both sides of the clamping leg. The main spring bow can be positioned between the pair of additional spring bows.

[0014] The spring-loaded clamping connector can have a busbar, wherein the clamping spring is supported at the busbar by its support leg, and the busbar has a contact section that, together with the clamping edge of the clamping leg, forms a clamping portion for clamping an electrical conductor. The clamping leg can form a clamping portion together with the contact section of the busbar to clamp the electrical conductor between the clamping leg and the contact section. In the open position, at least the clamping edge of the clamping leg pivots away from the contact section of the busbar. The clamping leg, for example, can pivot between an open position and a clamped position, in which the electrical conductor can move freely between the clamping leg and the contact section, and in which the clamping position, the clamping leg clamps the electrical conductor at the contact section.

[0015] The busbar can have a wire insertion opening, in which a clamping spring with its clamping legs sinks into the wire insertion opening.

[0016] The clamping spring can be supported by its support leg at the end wall of another opening in the limiting conductor insertion opening or busbar. This achieves a compact construction for stable support in a self-supporting system, where the clamping force is intercepted by the busbar. In this way, the support leg also serves as a support section for supporting the clamping spring at the busbar. The support section here allows for reliable support of the clamping spring and sufficient support relative to the spring force applied by the clamping leg.

[0017] The support leg is tapered at a section that extends into either the wire insertion opening or another opening in the busbar, and is supported on the busbar by a support section that forms a transition from the tapered section to a wider section extending toward the main spring bow, and extends laterally from the tapered section. This provides additional support for the clamping leg on the upper side of the busbar.

[0018] The spring-loaded clamping connector can have a retaining element with a locking profile for locking the clamping leg in an open retaining position that is displaced toward the support leg. This allows the clamping leg to self-lock in the open retaining position, enabling the wire to be guided to the clamping location without force, and after unlocking, clamping the wire between the clamping edge of the clamping leg and the contact section of the busbar.

[0019] The locking profile can be formed by a retaining lug extending from the retaining element or by an end edge at the retaining element. The locking profile of the retaining element can be a locking edge. The locking tab can extend from the clamping leg toward the retaining leg and is configured to lock at the locking profile in the open retaining position of the clamping leg.

[0020] Advantageously, on both sides of the opposite side edges of the tapering section of the retaining leg, the widened sections of the curved portion extend laterally in the transition of the corresponding side edges of the retaining leg and form locking profiles with their end edges respectively. In this way, the clamping leg can be locked symmetrically, with the locking force distributed across the two protruding sections.

[0021] The retaining element can be molded in one piece with the clamping spring and connected to the support leg with a retaining leg. The retaining leg can be bent away from the clamping leg on the lower side of the busbar, opposite to the upper side of the main spring bow of the clamping spring.

[0022] The retaining leg can be positioned adjacent to the locking profile away from the clamping leg bend. The retaining leg can taper from the bend toward the supporting leg, wherein the locking profile is formed at the end edge in the transition from the side edge edge of the retaining leg to the widened section extending laterally from the side edge edge of the bend.

[0023] The operating mechanism allows the clamping legs to be moved to the open position against the spring force of the clamping spring during manual operation. In the open position, the clamping legs can then be held in place by the retaining element, eliminating the need for additional manual operation of the operating mechanism and making it possible to introduce electrical wires at any time without requiring special force.

[0024] The retaining element can act directly on the clamping leg to hold the clamping leg in the open position. Therefore, for example, a first locking element can be provided at the clamping leg and a second locking element can be provided at the retaining element, wherein the first and second locking elements can lock into each other in the open position. The first locking element can be configured as a locking protrusion or a locking hook. The second locking element can be configured as a locking edge or a locking opening.

[0025] The retaining element can exist as a separate component, such as being fastened to an insulating housing, busbar, or other component of the terminal block.

[0026] According to an advantageous design of the invention, the retaining element is formed in one piece from the material of the clamping spring. This has the advantage that the retaining element can be produced directly during the bending and forming process of the clamping spring. This eliminates the need for separate installation of the retaining element.

[0027] According to an advantageous design of the invention, the spring-force clamping connector has a release element with a release section. When the wire to be clamped applies an actuating force to the release section, the release element allows the clamping leg, held in the holding element in the open position, to be released from the holding element. This allows the clamping leg to be automatically released from the holding element by inserting the wire. The release section can be pressured by a separate tool, a terminal component, such as an actuating element, or directly via the introduced wire itself, thereby releasing the clamping leg from the holding element. By means of the release element, the clamping leg held in the holding element in the open position can be released from the holding element by applying pressure to the release section in the wire introduction direction L of the wire to be connected. Depending on the configuration of the spring-force clamping connector, the release element can be configured as part of the clamping spring, for example, as a release element integrally formed with the clamping spring, or as a separate component.

[0028] According to an advantageous design of the invention, the retaining element is disposed at the support section, the release element, or the section of the clamping spring that connects the release section to the support section. The retaining element can be integrally formed with the support section, the release element, or the section of the clamping spring that connects the release section to the support section. In this manner, it is unnecessary to provide additional separate components. This reduces the manufacturing and installation costs of the spring-force clamping connector.

[0029] For example, a release leg can be connected to the retaining leg, the release leg extending into the centerline of the wire introduction channel with a release section and configured to deflect and unlock the locking profile by being inserted into the wire introduction channel to clamp the electrical wire at the busbar, thereby unlocking the clamping leg in the open retaining position.

[0030] Releasing the leg creates a free end that clamps the spring.

[0031] A terminal block with an insulating housing has a spring-loaded clamping connector according to the invention, the spring-loaded clamping connector being disposed within the insulating housing. The insulating housing has a wire inlet channel leading to a clamping leg of the spring-loaded clamping connector.

[0032] The spring-force clamping connector can have a retaining element with a locking profile and a releasing element with a releasing section. The locking profile is used to lock the clamping leg in an open retaining position displaced toward the support leg. The releasing element is configured to release the clamping leg from the locking profile by a triggering force, which can be applied by contacting the electrical wire on the releasing section. Advantageously, the insulating housing can have a guide ramp for guiding the electrical wire to the releasing section, wherein the guide ramp is located between the centerline of the wire introduction channel and the connecting section of the releasing leg extending from the retaining leg of the retaining element to the releasing section. This prevents the electrical wire from contacting the locking profile section of the clamping spring during insertion and prevents potentially undesirable premature unlocking. More specifically, it ensures that the electrical wire is guided to the releasing section by means of the guide ramp so that unlocking is only triggered by the wire when the colliding wire is inserted sufficiently deep as specified.

[0033] The release leg can be connected to the retaining leg, the release leg extending into the centerline of the wire introduction channel with a release section and configured to deflect and unlock the locking profile by being inserted into the wire introduction channel to clamp the electrical wire at the busbar to unlock the clamping leg in the open retaining position.

[0034] The actuating element is movably supported within the insulating housing and configured to apply force to the clamping legs, causing the clamping legs to shift toward the supporting legs into an open holding position. The actuating element can be configured, for example, as a movable press or a pivotable lever. In the case of a press, the press can be substantially linearly and movably disposed within a guide channel of the insulating housing.

[0035] Generally, in connection with this application, unless otherwise explicitly defined, the word "a" should not be understood as a numeral, but rather as an indefinite article meaning "at least one". Therefore, it is conceivable that multiple spring-loaded clamping connectors are provided within an insulating material housing. These spring-loaded clamping connectors, arranged sequentially or side-by-side transversely to the wire insertion direction, can have a common busbar. The terminals can be in a single row or multiple rows. Attached Figure Description

[0036] The present invention is described in detail below by way of exemplary embodiments. The accompanying drawings show:

[0037] Figure 1 A perspective view of a terminal block with inserted electrical wires is shown;

[0038] Figure 2 A side sectional view of a terminal block with a closed clamping spring is shown;

[0039] Figure 3A side sectional view is shown, showing a terminal block with an open clamping spring and an inserted electrical wire.

[0040] Figure 4 A perspective rear view of a spring-force clamping connector with an actuating element in the closed position is shown.

[0041] Figure 5 A perspective rear view of a spring-force clamping connector with an actuating element and an inserted electrical wire in the open position is shown.

[0042] Figure 6 A perspective front view of a spring-force clamping connector with an actuating element in the closed position is shown.

[0043] Figure 7 A perspective front view of a spring-force clamping connector with an actuating element and an inserted electrical wire in the open position;

[0044] Figure 8 A perspective rear view of a spring-force clamping connector with a clamping spring in the closed position is shown.

[0045] Figure 9 A perspective front view of a spring-force clamping connector with a clamping spring in the closed position is shown.

[0046] Figure 10 A perspective view of the clamping spring is shown;

[0047] Figure 11 A side view of the clamping spring is shown;

[0048] Figure 12 A perspective view of the lower side of the clamping spring is shown;

[0049] Figure 13 A perspective view of the busbar used for spring-force clamping connectors is shown;

[0050] Figure 14 A perspective view of the control element is shown;

[0051] Figure 15 A perspective view of an insulating material housing having a guide ramp in a wire receiving cavity is shown;

[0052] Figure 16 A side sectional view showing another embodiment of a terminal block having an open holding and triggering element with a closing clamping spring;

[0053] Figure 17 The diagram shows an open, locking clamping spring and an inserted electrical wire. Figure 16 A side sectional view of the wiring terminals;

[0054] Figure 18 Showing in the closed position Figure 16 A perspective view of the clamping spring of the terminal block;

[0055] Figure 19 Shown in the open position Figure 16 A perspective view of the clamping spring of the terminal block. Detailed Implementation

[0056] Figure 1 A terminal block 1 is shown, configured for connecting an electrical wire 9. The terminal block 1 has an insulating housing 2, within which a spring-loaded clamping connector is provided. The spring-loaded clamping connector has a busbar 3 and a clamping spring 4. A wire introduction opening 20 is formed in the insulating housing 2, through which the electrical wire 9 can be introduced into the insulating housing 2 in the wire introduction direction L. A wire introduction channel 25, leading into the interior of the insulating housing 2, is connected to the wire introduction opening 20, the wire introduction channel guiding the electrical wire 9 to the clamping position. The wire introduction channel 25 opens into a wire receiving cavity 22 in the insulating housing 2, where the free end of the electrical wire 9 to be connected can be placed.

[0057] The insulating housing 2 also has an operating channel 21 in which an operating element 7 for operating the clamping spring 4 is provided. The operating element 7 has a spring operating section 72, through which the clamping spring 4 is deflected during manual operation.

[0058] Figure 2 The terminal block 1 with further details is shown. It can be seen that the busbar 3 has a main section 30, in which a wire insertion opening 32, such as a slit-like opening, is present. A contact section 31 branches from the main section 30 in the form of a material tab that bends from the main section 30, the material tab extending through the wire insertion opening 32. An electrical wire 9 can be guided through the wire insertion opening 32 to clamp at the contact section 31.

[0059] The clamping spring 4 has a support leg 41, a main spring bow 42 connected to the support leg 41, and a clamping leg 43 connected to the main spring bow 42. The clamping leg transitions toward the free end into the clamping tongue 45. A clamping edge 46 is formed at the free end of the clamping tongue. The clamping edge is used to firmly clamp the wire to the contact section 31.

[0060] A second spring bow branches off from the support leg 41, more specifically, an additional spring bow 44, which is integrally formed from the material of the clamping spring 4. The additional spring bow 44 bends more strongly than the main spring bow 42, i.e., it has a smaller bending radius. Furthermore, the additional spring bow 44 branches off from the support leg 41 before the main spring bow 42, thus extending below the main spring bow in the wire introduction direction L from the conductor to the terminal 1, i.e., extending at a greater distance from the wire introduction opening 20 than the distance from the main spring bow 42 to the wire introduction opening. The additional spring bow 44 is formed from a material segment that is laterally separated from the material of the clamping spring.

[0061] At the separated material section, a concave section 48 connects to an additional spring bow 44, the concave section being arc-shaped in the opposite bending direction to the convex bending of the additional spring bow 44. The concave section 48 transitions towards the free end into a support section 49, which rests against the underside of the clamping leg 43 by a certain spring preload, specifically against the side of the clamping leg 43 facing the support section 41 and away from the wire inlet opening 20. Thus, the additional spring bow 44 supports the clamping leg 43 by an additional spring force, thereby increasing the total spring force of the clamping spring 4.

[0062] The clamping spring 4 is supported and supported on the busbar 3 by its support leg 41, for example, in such a way that the support leg 41 extends into the wire insertion opening 32 by an inserting section 40.

[0063] It can also be seen that the operating element 7 has an operating surface 70 for manual operation, the operating surface facing the outside of the insulating material housing 2 and being pressure-loaded for operation. The operating surface 70 is part of the body 71 of the operating element 7. The operating element 7 extends from the body 71 toward the clamping leg 43 in a forked manner via spring operating sections 72, wherein the clamping leg 43 extends at least partially between the forked spring operating sections 72.

[0064] Figure 2 The terminal 1 is shown in its unoperated state, i.e., the operating element 7 is not operated. Correspondingly, the clamping edge 46 is located at or at least near the contact section 31 when the electrical wire 9 is not inserted.

[0065] Figure 3The terminal 1 is shown when the operating element 7 is operated. At this time, the operating element 7 is further displaced downwards into the insulating housing 2 by pressure applied to the operating surface 70. As a result, the clamping leg 43 deflects via the spring operating section 72, causing the clamping edge 46 to move away from the contact section 31. In this state, the wire 9 can be positioned at the clamping location or removed from the terminal 1 without requiring force. If the operating force on the operating element 7 is released, the clamping spring 4 or the clamping leg 43 springs out again until the clamping edge 46 reaches the wire 9 and presses against the contact section 31. Thus, the wire 9 is securely clamped at the clamping location between the clamping leg 43 and the contact section 31.

[0066] Figure 4 The terminal 1 without the insulating housing 2 is shown in the unoperated state of the operating element 7. It can be seen that the operating element 7 has a retaining element 73 at either of the two spring operating sections 72 or only at one spring operating section 72, for example in the form of an outwardly protruding barb-like protrusion, which prevents the operating element 7 from being detached from the insulating housing 2 again after installation.

[0067] It can also be seen that the clamping spring 4, with the connection between the main spring bow 42 and the clamping leg 43 on the main spring bow, passes through the free space formed between the spring operating sections 72. Furthermore, a corresponding laterally extending force-absorbing tab 51 is formed at the clamping leg 43. The force-absorbing tab 51 is used to absorb the operating force of the spring operating section 72 of the operating element 7 on one side. On the opposite side, the force-absorbing tab 51 is loaded with a reaction force via the support section 49 of the additional spring bow 44.

[0068] Furthermore, it can be seen that the support leg 41 tapers with its section 40 extending into the wire insertion opening 32 and is supported on the busbar 3 with a support section 52, which forms a transition from the tapered section to a wider section extending toward the main spring bow 42 and extends laterally from the tapered section.

[0069] Figure 5 Showing with Figure 3 Similarly, in the case of manipulating the control element 7 and inserting the electrical wire 9, according to... Figure 4 The settings. Figure 6 The basis is shown in another observation direction. Figure 4 The settings. Figure 7 Showing in with Figure 6 Based on the same observation direction Figure 5 The settings.

[0070] Figure 8 In Figure 4 A similar view shows busbar 3 together with clamping spring 4, i.e., without operating element 7. Figure 9 In Figure 6 A similar view shows the busbar 3 and the clamping spring 4, but without the actuating element 7.

[0071] Figures 10 to 12 The clamping spring 4 is shown in different views, from which the already described elements can be seen. In particular, it can be seen that the support leg 41 transitions toward the free end into a narrower inserting section 40 in such a way that the material width of the support leg 41 is reduced so that the support leg 41 can be inserted into the wire insertion opening 32 of the busbar 3 in the section 40 and can be supported on the main section 30 of the busbar 3 in the support section 52 that appears in the transition from the narrower inserting section 40 to the wider area of ​​the support leg 41.

[0072] Figure 13 The busbar 3 is shown as a single component. It can be seen that the wire insertion opening 32 is slightly wider in the region of the contact section 31 than in the end region, which serves as a spring receiving portion 33 for accommodating the extension section 40 of the clamping spring 4. The wider region of the slit-like opening serves as the wire insertion opening 32 for inserting the electrical wire 9.

[0073] Figure 14 The manipulation element 7 is shown, which has the elements already described.

[0074] Figure 15 An insulating material housing 2 with the elements already described is shown. Additionally, it can be seen that within the insulating material housing 2, a wire guiding element 23 with a guide ramp 24 is provided in the region of the wire receiving cavity 22 where the free end of the wire to be connected 9 can be placed. The guide ramp is inclined to the wire introduction direction L, and a funnel-shaped wire guide portion of the wire 9 is formed in said region of the wire receiving cavity 22. The inserted wire 9 is specifically guided by the guide ramp 24 to a desired, central position within the wire receiving cavity 22.

[0075] according to Figures 16 to 19 Another embodiment of the terminal block 1 is described, the terminal block having the function of automatically keeping the clamping leg 43 open and automatically releasing the clamping leg when the electrical wire 9 is inserted. First, Figure 16 In Figure 2In a similar view, the terminals are shown in the unoperated state of the operating element 7. It can be seen that the clamping spring 4 does not terminate with an inserted section 40 in the region of the support leg 41, but is instead extended, and has a molded retaining element 5 in said region. Thus, the clamping spring transitions in one piece from the retaining element 5 into the releasing element 8, where a releasing section 80 is formed at the free end. Furthermore, the clamping spring 4 has at least one first locking element 47 in the region of the clamping leg 43, which can cooperate with a second locking element 50, which can... Figure 18 and Figure 19 This can be seen from the text.

[0076] like Figure 17 As shown, if the clamping leg 43 is deflected by the actuating element 7, the clamping leg 43, in the open position of the actuation, locks with its first locking element 47 at the second locking element 50 of the retaining element 5, and remains in the open position due to the lock. Thus, when the wire 9 is inserted into the terminal 1, the lock between the first locking element 47 and the second locking element 50 can be released by applying pressure to the release section 80 during the insertion process, for example, by the release section 80 deflecting slightly downwards along with the retaining element 5, i.e., in the wire introduction direction L. The clamping leg 43 can spring back again by the release of the lock, thus firmly clamping the wire 9 at the busbar 3.

[0077] Figure 18 The diagram shows the situation in the relaxed state, or in the clamped position, according to... Figure 16 and Figure 17 The clamping spring 4 in the described implementation method. Figure 19 The clamping spring 4 is shown in the open position of the lock. It can be seen that the first locking element 47 extends laterally from the clamping legs 43. The clamping tongues 45 of the clamping legs 43 extend further between the locking elements 47 to the clamping edge 46. The retaining element 5 is configured as a relatively narrow material section through which the section 40 of the support leg 41 extends. Near the transition to the release section 80, the material width of the retaining element 5 increases on both sides, such that the shoulders formed therefrom constitute the second locking elements 50. Figure 19 As shown, the corresponding first locking element 47 can be locked at the second locking element 50 in the operating state of the terminal block.

[0078] List of reference numerals

[0079] 1. Terminal block

[0080] 2. Insulating material housing

[0081] 3 busbars

[0082] 4. Clamping spring

[0083] 5. Holding element

[0084] 7. Control elements

[0085] 8. Loosen the components

[0086] 9. Electrical wires

[0087] 20. Wire introduction opening

[0088] 21. Manipulation Channel

[0089] 22. Conductor receiving cavity

[0090] 23. Wire guiding element

[0091] 24 Guide ramp

[0092] 25. Wire introduction channel

[0093] 30 main section

[0094] 31 contact section

[0095] 32. Wire insertion opening

[0096] 33 Spring receiving part

[0097] 40. The section that extends in.

[0098] 41 Supporting Legs

[0099] 42 Main Spring Bow

[0100] 43. Clasp your legs together.

[0101] 44 Additional spring bow

[0102] 45 clamping tongue

[0103] 46. ​​Clamp the edges

[0104] 47 First locking element

[0105] 48. Concave section

[0106] 49 Support Section

[0107] 50 Second locking element

[0108] 51 Force Absorbing Connector

[0109] 70 control surfaces

[0110] 71 Main Body

[0111] 72 Spring-operated section

[0112] 73 Fixing Components

[0113] 80. Loosen section

[0114] L-direction of wire introduction

Claims

1. A spring-force clamping connector for clamping electrical conductors, the spring-force clamping connector having a clamping spring (4), the clamping spring having a support leg (41), a clamping leg (43) and a main spring bow (42), the clamping leg having a clamping edge (46) for clamping the electrical conductor, the main spring bow connecting the support leg (41) and the clamping leg (43), characterized in that, The clamping spring (4) also has an additional spring bow (44) which is made of the same material as the clamping spring (4) in one piece and extends from the support leg (41) toward the clamping leg (43), wherein the free end of the additional spring bow (44) is placed on the side of the clamping leg (43) toward the support leg (41).

2. The spring-force clamping connector according to claim 1, characterized in that, The additional spring bow (44) has a curvature that is different from the curvature of the main spring bow (42).

3. The spring-force clamping connector according to claim 1 or 2, characterized in that, The distance between the additional spring bow (44) and the clamping edge (46) is set to be different from the distance between the main spring bow (42) and the clamping edge (46).

4. The spring-force clamping connector according to any one of claims 1 to 3, characterized in that, The additional spring bow (44) is offset in the width direction next to the main spring bow (42).

5. The spring-force clamping connector according to any one of the preceding claims, characterized in that, The additional spring bow (44) is formed by a pair of spring bows that extend from opposite edge regions of the support leg (41) and engage below the force-absorbing tabs (51) extending from the clamping leg (43) on both sides of the clamping spring (4).

6. The spring-force clamping connector according to any one of the preceding claims, characterized in that, The spring-force clamping connector has a busbar (3), wherein the clamping spring (4) is supported at the busbar (3) by the support leg (41), and the busbar (3) has a contact section (31), which together with the clamping edge (46) forms a clamping portion for clamping the electrical wire.

7. The spring-force clamping connector according to claim 6, characterized in that, The busbar (3) has a wire insertion opening (32), wherein the clamping leg (43) is recessed into the wire insertion opening (32).

8. The spring-force clamping connector according to claim 6 or 7, characterized in that, The clamping spring (4) is supported by the support leg (41) at the end wall of the wire insertion opening (32).

9. The spring-force clamping connector according to claim 8, characterized in that, The section (40) of the support leg (41) that extends into the wire insertion opening (32) tapers and is supported on the busbar (3) by a support section (52) that forms a transition from the taper to a wider section that extends toward the main spring bow (42) and extends laterally from the taper.

10. The spring-force clamping connector according to any one of the preceding claims, characterized in that, The spring-force clamping connector has a retaining element (5) with a locking profile (50) for locking the clamping leg (43) in an open retaining position that is displaced toward the support leg (41).

11. The spring-force clamping connector according to claim 10, characterized in that, The locking profile (50) is formed by a retaining lug extending from the retaining element (5) or by an end edge at the retaining element (5).

12. The spring-force clamping connector according to claim 10 or 11, characterized in that, The retaining element (5) is integrally formed with the clamping spring (4) and is connected to the support leg (41) with a retaining leg, wherein the retaining leg is bent away from the clamping leg (43) on the lower side opposite to the upper side of the busbar (3) facing the main spring bow (42).

13. The spring-force clamping connector according to claim 12, characterized in that, The retaining leg bends away from the clamping leg (43) in a manner adjacent to the locking profile, and the retaining leg tapers toward the supporting leg (41) from the bend, wherein the locking profile (50) is formed in the transition from the side edge edge of the retaining leg to the widened section of the bend that extends laterally from the side edge edge.

14. The spring-force clamping connector according to claim 13, characterized in that, On both sides of the opposite side edge edges of the tapered section of the retaining leg, the widened section of the curved portion extends laterally in the transition of the corresponding side edge edges of the retaining leg and forms the locking profile (50) with its end edges respectively.

15. The spring-force clamping connector according to any one of claims 12 to 14, characterized in that, A release leg is connected to the retaining leg, the release leg extending to the centerline of the wire introduction channel with a release section and configured to deflect by an electrical wire inserted into the wire introduction channel to unlock the clamping leg (43) locked in the open retaining position.

16. The spring-force clamping connector according to claim 15, characterized in that, The release leg forms the free end of the clamping spring (4).

17. The spring-force clamping connector according to any one of claims 10 to 15, characterized in that, The locking profile (50) is a locking edge, and the locking tab (47) extends from the clamping leg (43) toward the retaining leg and is able to lock at the locking profile (50) in the open retaining position of the clamping leg (43).

18. A terminal block (1) having an insulating material housing (2), the terminal block having a spring-force clamping connector according to any one of the preceding claims in the insulating material housing (2), and a wire introduction channel having a clamping leg (43) leading to the spring-force clamping connector.

19. The terminal block according to claim 18, characterized in that, The spring-force clamping connector has a retaining element (5) with a locking profile (50) and a releasing element (8) with a releasing section (80). The locking profile is used to lock the clamping leg (43) in an open retaining position displaced toward the support leg (41). The releasing element is configured to unlock the clamping leg (43) from the locking profile (50) by a triggering force that can be applied by contacting an electrical wire on the releasing section (80). The insulating housing (2) has a guide ramp (24) for guiding the electrical wire to the releasing section (80). The guide ramp (24) is disposed between the centerline of the wire introduction channel and the connecting section of the releasing leg extending from the retaining leg of the retaining element (5) to the releasing section (80).

20. The terminal block according to claim 19, characterized in that, A release leg is connected to the retaining leg, the release leg extending into the centerline of the wire introduction channel with a release section (80) and configured to deflect by an electrical wire inserted into the wire introduction channel to unlock the clamping leg (43) locked in the open retaining position.

21. The terminal block according to any one of claims 18 to 20, characterized in that, An actuating element (7) is provided, which is movably supported in the insulating material housing (2) and configured to apply force to the clamping leg (43) so that the clamping leg (43) moves toward the supporting leg (41) into the open holding position.

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