Spring force clamping connection piece and connection terminal

Abstract

The invention relates to a spring-loaded clamping connection, comprising a busbar having a clamping region and a cage tension spring. The spring-loaded clamping connection has a pivotably mounted release element having a release section and a locking section, the release section being designed to pivot the release element by means of a force acting by the inserted electrical conductor to be clamped, and the locking section being designed to lock the release element when the cage tension spring is in the open state. The locking section forms a stop for the retaining contour of the clamping section in the locking pivoting position of the release element, and wherein the clamping point is opened by displacing the actuating section towards the support leg and spacing the transverse web from the clamping region of the busbar, and wherein the release section forms a rotation prohibition in the locked pivoting position, which prohibits the pivoting of the release element, and wherein the release section is designed to cancel the rotation prohibition by a release force in order to release the release element for pivoting away from the clamping section in order to cancel the stop.

Description

Field of the Invention

[0001] The present invention relates to a spring - force clamping connection member, which has: a bus bar having a clamping section; and a cage - type tension spring having a support leg for abutting against a first side of the bus bar, a spring bow connected to the support leg, and a clamping leg connected to the spring bow. The clamping leg has an operating section connected to the spring bow and extending away from the bus bar, and a clamping section bent from the operating section and extending back towards the bus bar. The clamping section has a void portion bounded by a transverse tab at the free end of the clamping section, wherein the bus bar extends through the void portion with its clamping section, and the transverse tab and the clamping section together form a clamping site for clamping an electrical wire.

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

[0003] Spring - force clamping connection members are used to clamp electrical wires at a clamping site formed between the clamping leg of a clamping spring and a bus bar. To clamp an electrical wire, when directly connected, the clamping spring is pushed away from the bus bar against the force of the clamping spring by the electrical wire. This is feasible for rigid wires, but not feasible in the case of stranded wires or multi - strand wires.

[0004] For clamping electrical wires, there is a need to provide a spring - force clamping connection member that self - holds in an open holding position. It is generally desirable that the terminal block has an open spring - force clamping connection member when leaving the factory.

[0005] WO 2021 / 105280 A1 discloses a direct - plug - in terminal for connecting electrical wires, which has a bus bar, a clamping spring acting as a compression spring, and a holding spring for locking the clamping spring in an open state. Summary of the Invention

[0006] Based on this, the object of the present invention is to implement an improved spring - force clamping connection member and a terminal block having such a spring - force clamping connection member.

[0007] The above object is achieved by the spring - force clamping connection member of the present invention and the terminal block of the present invention. Advantageous embodiments are described below.

[0008] It is proposed that the spring force clamping connection element has a pivotally supported release element, which has a release section and a locking section configured to pivot the release element by the force action achieved by the inserted electrical wire to be clamped. When the cage spring is in the open state, the locking section forms a stop for the holding profile of the clamping section in the locked pivoting position of the release element. In the open state, the clamping site is opened by displacing the operating section towards the support leg and spacing the transverse tab from the clamping section of the busbar. And the release section forms a rotation prevention section in the locked pivoting position, which prevents the pivoting of the release element, and the release section is configured to cancel the rotation prevention section by the release force applied to the release section by the action caused by the inserted electrical wire to be clamped, so as to release the release element for pivoting away from the clamping section to cancel the stop.

[0009] Thereby, a cage spring is realized, which has a lock realized by a pivotally supported release element at the clamping leg in the open state. The locking and unlocking realized by the release element are independent of operating the cage spring into the open state by means of, for example, an operating rod or an operating tool. The release element can be implemented compactly and can also be additionally integrated into the existing structure of the spring terminal.

[0010] "Free end" is understood as the freely movable end region where the clamping leg terminates.

[0011] For the construction of the holding profile, a large number of variants are feasible. The holding profile can be configured, for example, as a negative profile formed by a cutout or as a positive profile formed by a protruding tab. The negative profile can be implemented as an additional hole (opening) in the clamping section. However, it is also conceivable that the cutout existing anyway in the clamping section is used as the negative profile, so that the transverse tab forming the clamping edge forms the stop, the busbar is guided through the cutout and the cutout is used to accommodate the wire. However, additional openings can also be placed below the transverse tab or above the cutout.

[0012] However, an opening in the clamping section is not necessarily required. A positive holding profile is also conceivable, where a material lug bends out from the clamping section. Such a holding lug can, for example, bend out from the cutout above the busbar. The locking section should be supported on the upper side of the busbar here.

[0013] "Above the busbar" or "the upper side of the busbar" is understood as the support side on which the cage spring supports with its support legs. Thus, it refers to the side of the busbar facing the operating section. "The lower side of the busbar" is the clamping side opposite to the upper side, where the electrical wire is clamped.

[0014] The retaining lug can also be bent laterally past the busbar such that the locking section bears against the lower side of the busbar and latches beside the retaining lug of the busbar. The locking section can be configured, for example, as a stop tongue (locking tongue).

[0015] The release section can extend transversely to the plane of the busbar. The term "transversely" should not be construed as exactly 90° or perpendicular. The release section only needs to be in the alignment line along which the electrical conductor is inserted for clamping to the busbar such that the electrical conductor strikes the release section. Preferably, the release section has a tolerance of 90° ± 20° with respect to the plane of the busbar. For the reference point of the busbar plane, the following area is important: the area closest to the release section or towards which the release section extends.

[0016] The locking section can extend away from the release section towards the clamping section in its open position.

[0017] The retaining profile of the clamping section can be formed by a transverse tab of the cutout that bounds the clamping section, wherein the locking section that extends into the cutout in the locked state forms a stop for the transverse tab.

[0018] The clamping section can have a locking opening in the transverse tab, in the edge tab that laterally bounds the cutout, or in the area of the clamping section that extends from the cutout to the operating section, wherein the locking opening forms the retaining profile and the locking section that extends into the locking opening in the locked pivoted attitude forms a stop for the clamping section.

[0019] At the clamping leg, the stop tongue can project from the plane of the clamping leg that forms the retaining profile, wherein the locking section is arranged between the stop tongue and the operating section in the locked pivoted attitude and forms a stop for the stop tongue.

[0020] A pivot bearing can be formed between the locking section and the release section of the release element. The release element can be rotatably supported about the pivot bearing spaced apart from the busbar on the lower side of the busbar and adjacent to the clamping section in the open state of the cage spring, the lower side being opposite the upper side of the support leg of the busbar against which the cage spring abuts.

[0021] The attitude adjacent to the clamping section means that the pivot bearing is arranged closer to the clamping section than the release section close to the release element.

[0022] The release element can be arranged with its locking section spaced apart from the busbar and extend towards the clamping section in the open state of the cage spring. A pivot bearing and a lever arm section extending spaced apart from the busbar in the wire insertion direction can be connected to the locking section, the lever arm section transitioning into the release section that extends transversely towards the busbar.

[0023] The release section can pass by the busbar and extend to the first side of the busbar and has a retaining projection that latches with the busbar or the support leg and prevents pivoting of the release section in the locked pivoted position of the release element, wherein the retaining projection can be unlocked by a release force applied to the release section by the inserted electrical conductor.

[0024] The release element can be spring-elastic and configured to apply a restoring force to the release element by which the locking section is displaced into the locked pivoted position with the clamping section.

[0025] From the release section, a spring-elastic restoring section can extend towards the busbar and be supported at the busbar.

[0026] The release element can be U-shaped, wherein the release section transitions on the one hand into a lever arm section and on the other hand into a spring arm section, and the lever arm section transitions via a pivot bearing section into the locking section. The release section extends transversely to the longitudinal extension direction of the busbar.

[0027] The U-shaped release element is arranged with its release section in a wire receiving space that is enclosed by the clamping leg, the underside of the busbar, and the lever arm section. For improved wire guidance, lateral bounding can optionally be achieved by the inner wall of the insulating material housing.

[0028] The terminal has an insulating material housing and at least one of the above-mentioned spring force clamping connectors in the insulating material housing, wherein the insulating material housing has a wire introduction opening leading to the release section of the release element.

[0029] The release element can be pivotally supported in the insulating material housing with its pivot bearing section. Thereby, the insulating material housing forms a mating support section for the pivot bearing section. The support can be, for example, a rotational support about a fixed axis or a floating support along a movement trajectory.

[0030] The insulating material housing can have an operating opening that leads towards the operating section of the clamping leg.

[0031] The operating opening can be configured to accommodate an operating tool or an operating element that can be movably inserted into the operating opening. An operating tool, such as a screwdriver, can be introduced into the operating opening, or the operating element can be movably inserted into the operating opening.

[0032] The operating tool or the operating element can be placed in contact with the operating section of the cage spring in order to pivot the clamping section into the open state and latch with the locking section. The operating section is displaced towards the support leg for this purpose.

[0033] However, the latching is in principle independent of the type of operation.

[0034] Generally speaking, in the context of the present application, unless otherwise clearly defined, the word "a" should not be understood as a numeral, but rather as an indefinite article with the meaning of "at least one". BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention allows for different embodiments and is hereinafter described in detail by way of example according to embodiments. The drawings show:

[0036] Figure 1 A side sectional view showing a first embodiment of a terminal in a closed position;

[0037] Figure 2 Showing Figure 1 A perspective view of the closed terminal in;

[0038] Figure 3 Showing Figure 1 A side sectional view of the terminal in the unlocked open state in;

[0039] Figure 4 Showing Figure 3 A perspective view of the open and latched terminal in;

[0040] Figure 5 Showing for Figures 1 to 4 A perspective view of the holding and releasing element for the terminal in;

[0041] Figure 6 A side sectional view showing a second embodiment of a terminal in a closed position;

[0042] Figure 7 Showing Figure 6 A perspective view of the closed terminal in;

[0043] Figure 8 Showing Figure 6 A side sectional view of the terminal in the unlocked open state in;

[0044] Figure 9 Showing Figure 8 A perspective view of the open and latched terminal in;

[0045] Figure 10 Showing for Figures 6 to 9 A perspective view of the holding and releasing element for the terminal in;

[0046] Figure 11 Showing for Figures 6 to 9 A perspective view of the clamping spring for the second embodiment of the terminal in;

[0047] Figure 12Side cross-sectional view of a third embodiment of a terminal in a closed position;

[0048] Figure 13 Shows Figure 12 A perspective view of the closed terminal in;

[0049] Figure 14 Shows Figure 12 Side cross-sectional view of the terminal in the open state of the latch in;

[0050] Figure 15 Shows Figure 12 A perspective view of the open and latched terminal in;

[0051] Figure 16 Shows for Figures 12 to 15 A perspective view of the holding and releasing element for the terminal in;

[0052] Figure 17 Shows for Figures 12 to 15 A perspective view of the clamping spring of the third embodiment of the terminal in. Detailed implementation

[0053] Figure 1 Side cross-sectional view showing the first embodiment of terminal 1 in a closed position.

[0054] Terminal 1 has an insulating material housing 2, and a spring-force clamping connection 3 is inserted into the insulating material housing.

[0055] The spring-force clamping connection 3 has a busbar 4 and a cage spring 5. The cage spring 5 has support legs 6, and the support legs are supported on the upper side of the busbar 4. A spring bow 7 is connected to the support legs 6, and the spring bow transitions into a clamping leg 8. The clamping leg 8 has an operating section 9 extending away from the support legs 6 and a clamping section 10 that is bent from the end of the operating section 9 remote from the spring bow 7 and extends towards the support legs 6 or towards the busbar 4. The clamping section 10 has a void 11 that is bounded by a transverse tab 12 and the busbar 4 extends through the void.

[0056] The busbar 4 has a clamping area 13, which can be configured, for example, as an arching from the busbar plane as shown. The clamping area 13 and the transverse tab 12 together form a clamping site for clamping an electric wire between the transverse tab 12 and the clamping area 13 to the busbar 4 by the force of the cage spring 5.

[0057] The arched clamping area 13 of the busbar 4 transitions into a free busbar end 14 extending from the plane of the busbar 4, and the plane is unfolded by the busbar 4 in the area in front of the clamping area 13.

[0058] In order to displace the cage spring 5 into the open state, the insulating material housing 2 can have an operating opening 15. A guide wall 16 can be provided in the operating opening 15 in order to guide an operating tool, such as a screwdriver, inserted into the operating opening 15 to the operating section 9 of the cage spring 5. By means of the operating tool, an operating force can be applied to the operating section 9 in the direction towards the support leg 6 in order to displace the operating section 9 towards the support section 6.

[0059] The busbar 4 can have a side wall 17 bent from the busbar plane and a bottom plate 18 protruding from the side wall 17 away from the clamping region 13.

[0060] In order to lock and to unlock the spring force clamping connection 3 locked in the open state, there is a tension bow 20 configured as an independent component, which is pivotally supported at the busbar 4 and / or the insulating material housing 2 adjacent to the clamping section 10 and the transverse tab 12 by a pivot bearing 21. Thus, the tension bow 20 can, for example, sink a laterally protruding support pin 21a into a support opening 21b of the side wall 17 (see Figure 2 ) in order to form the pivot bearing 21.

[0061] The tension bow 20 forms a locking section 22 from its pivot bearing 21 to the free end provided beside the clamping section 10. On the exactly opposite side, the free end region of the tension bow 20, which is remote from the clamping section 10 in the wire introduction direction L, extends approximately parallel to the busbar 4 towards the bottom plate 18. The tension bow 20 has a release section 23 facing away from the clamping section 10 of the cage spring 5 towards the busbar 4. The release section 23 is transverse to the wire introduction direction L, such that a release force can be applied to the release section 23 by the inserted electrical wire, and by means of the release force, a pivoting of the tension bow 20 about the pivot bearing 21 is caused. Thereby, when a force acts on the release section 23 by the electrical wire to be clamped inserted into the wire introduction opening 24 of the insulating material housing 2, an unlocking of the clamping leg 8 locked at the locking section 22 can be caused.

[0062] The locking section 22 of the tension bow 20 is coordinated with the clamping section 10 of the clamping leg 8 such that the locking section 22 forms a stop for the transverse tab 12 at the free end of the tension bow 21 in the open state of the cage spring 5. In the open state, the clamping site is opened by displacing the operating section 9 towards the support leg 6 and by spacing the transverse tab 12 from the clamping region 13 of the busbar 4. Thereby, the clamping section 10 of the cage spring 5 is locked at the locking section 22.

[0063] In order to prevent the tension bow 20 from automatically rotating in the open state, the release section 23 has a retaining projection 25 which projects from the plane of the release section 23 towards the adjacent region of the clamping section 10 or the busbar 4, and the busbar has a clamping region 13. Thereby, a rotation prohibition section for the tension bow 20 is formed.

[0064] Between the region of the busbar 4 and the arm section 26 of the tension bow 21 which extends towards the pivot bearing 21, the insulating material housing 2 may have a protruding stop 27, and the movement freedom of the tension bow 20 is limited by the stop.

[0065] The insulating material housing 2 may have a centering pin 28, wherein the cage spring 5 surrounds the centering pin 28 and is supported at the centering pin 28 by its spring bow 7. Thereby, the movement of the cage spring 5 in the insulating material housing 2 is limited.

[0066] Figure 2 Shows Figure 1 a perspective view of the closed terminal 1 in.

[0067] Obviously, the tension bow 20 is sunk into the support opening 21b in the side wall 18 by the support pin 21a so as to form a pivot bearing 21 for the tension bow 20.

[0068] Also obviously, the free end of the locking section 22 connected to the pivot bearing 21 projects towards the plane of the transverse tab 12. The free end may terminate with one or, as shown, a plurality of narrower locking tabs. The frictional force for unlocking is reduced by the narrower end.

[0069] It can also be seen that the clearance 11 in the clamping section 10 of the clamping leg 8 is bounded by the edge tab 19 and the transverse tab 12.

[0070] Figure 3 Shows Figure 1 a side sectional view of the terminal 1 in the latched open state.

[0071] It can be seen that the locking section 22 is sunk into the clearance 11 of the clamping section 10 and forms a stop for the transverse tab 12 that bounds the clearance 11. The tension bow 20 pivots into the locked pivot position and engages the busbar 4 below. The tension bow latches at the busbar 4 with its retaining projection 25. In the locked pivot position, the vertical arm section 26 of the tension bow 20 abuts against the stop 27. The force applied to the tension bow 20 by the clamping section 10 is thereby received not only by the pivot bearing 21 but also through the stop 27.

[0072] As an alternative thereto, it is conceivable that the retaining projection 25 is configured as a cutout or opening in the release section 23. Then, at the bus bar 4, a protruding pin or retaining projection can be formed, which sinks into the cutout or opening of the release section 23 for locking.

[0073] Figure 4 shows Figure 3 a perspective view of the open and latched terminal block 1 in

[0074] The clamping section 10 latches at the tension bow 20 in such a way that the free end of the locking section 22 abuts against the transverse tab 12 and forms a stop for the clamping leg 8. The automatic pivoting of the tension bow 20 is prevented in that the release section 23 engages below the bus bar 4 and latches at the bus bar 4 by means of the retaining projection 25.

[0075] When now an electrical conductor is inserted into the conductor insertion opening 24 and plugged through the cutout 11, the free end of the electrical conductor reaches the release section 23 provided in the alignment line F of the conductor insertion opening 24. Thereby, the release section 23 is displaced downward in the conductor insertion direction L and the retaining projection 25 is disengaged from the bus bar 4. Thereby, the tension bow 20 under spring tension pivots, such that the stop for the latching tab 29 of the transverse tab 12 is canceled. Thus, the clamping leg 8 can pivot back into the clamping state by the spring force of the cage spring 5.

[0076] Figure 5 shows the retaining and releasing element, namely the tension bow 20, for Figures 1 to 4 the terminal block 1 in a perspective view.

[0077] The retaining and releasing element 20 is configured as an L-shaped plate, wherein the horizontally extending section in the illustration forms the release section 23 and the vertically extending section in the illustration forms the lever arm section 26, which has a support pin 21b and a locking section 22 connected thereto. As shown, the locking section 22 can have two latching tabs 29. Other latching profiles are equally conceivable. Here, "horizontal" is understood as an extension in the width direction of the lever arm section 26 and "vertical" is understood as the longitudinal extension direction of the lever arm section 26.

[0078] Obviously, the two support pins 21b protrude from the edge edges of the lever arm section 26 in directions completely opposite to each other.

[0079] The retaining projection 25 on the upper side of the release section 23 protrudes toward the lever arm section 26.

[0080] Figure 6 shows a side sectional view of a second embodiment of the terminal block 1 in the closed position. The second embodiment is basically similar to the first embodiment, such that reference is made toFigure 1 Embodiment. Different from the first embodiment, an additional locking opening 30 is placed into the transverse tab 12.

[0081] Figure 7 Shows Figure 6 A perspective view of the closed terminal 1 in

[0082] It can be seen that the transverse tab 12 has a locking opening 30. The locking section 22 is formed on the locking opening 30 such that the latching tab 29 sinks into the locking opening 30 in the locked state at the free end of the locking section 22. Thereby, the clamping leg 8 is latched at the locking section 22. Thereby, a negative holding profile (negative profile) is formed at the clamping section 10.

[0083] Figure 8 Shows Figure 6 A side sectional view of the terminal 1 in the locked open state in Figure 9 And shows a perspective view of the open and latched terminal 1.

[0084] It can be seen that the release section 23 is latched to the busbar 4 by means of the retaining projection 25. The latching tab 29 at the free end of the locking section 22 sinks into the locking opening 30 to form a stop for the clamping leg 8. The spring force applied by the cage spring 5 to the tension bow 20 in the locked open state is received by the pivot bearing 21 formed by the support pin 21a and the support opening 21b and the stop 27.

[0085] When now an electrical conductor is inserted into the conductor insertion opening 24 and plugged through the clearance 11, the free end of the electrical conductor reaches the release section 23 provided in the alignment line F of the conductor insertion opening 24. Thereby, the release section 23 is displaced downward in the conductor insertion direction L and the retaining projection 25 is disengaged from the busbar 4. Thereby, the rotation prohibition section is canceled. Thereby, the tension bow 20 under spring tension rotates, so that the stop for the latching tab 29 of the transverse tab 12 is canceled. Therefore, the clamping leg 8 can pivot back to the clamping state by the spring force of the cage spring 5.

[0086] Figure 10 Shows for Figures 6 to 9 A perspective view of the retaining and releasing element, i.e., the tension bow 20, for the terminal 1 in

[0087] The tension bow 20 is again L-shaped. The tension bow is Figure 5 Different from the embodiment in

[0088] Figure 11 Shows for Figures 6 to 9Stereoscopic view of the cage spring 5 of the second embodiment of the terminal 1 in

[0089] The cage spring 5 is conventionally formed annularly by support legs 6, spring bows 7, operating sections 9, and clamping sections 10 that bend back to the support legs 6. The clamping section 10 has a void 11 that is bounded by spaced-apart, parallel edge tabs 19 and a transverse tab 12 at the free end.

[0090] The transverse tab 12 has a rectangular locking opening 30 that is configured to latch the clamping leg 8 at the locking section 22.

[0091] Figure 12 Side cross-sectional view showing the third embodiment of the terminal 1 in the closed position.

[0092] In this embodiment, the clamping section 10 has a positive holding profile (positive profile) in the form of a stop tongue 31 that projects from the transverse tab 12 towards the busbar 4 or abuts against the support leg 6 thereat.

[0093] The locking section 22 of the tension bow 20 in turn has at least one latching tab 29 at its free end, which forms a stop for the stop tongue 31 in the open state of the latch.

[0094] Figure 13 Shows Figure 12 Stereoscopic view of the closed terminal 1 in

[0095] It can be seen that the stop tongue 31 projects from the material of the transverse tab 12 in the central region of the transverse tab 21 and projects from the plane of the transverse tab 12 towards the support leg 6 or the spring bow 7.

[0096] The tension bow 20 is in turn supported with its projecting support pin 21a in a support opening 21b in the side wall 17 of the busbar 4.

[0097] Figure 14 Shows Figure 12 Side cross-sectional view of the terminal 1 in the open state of the latch in Figure 15 Stereoscopic view of the open and latched terminal 1.

[0098] The central latching tab 29 at the free end of the locking section 22 projects towards the transverse tab 12 in the open state or the locked pivoted position and forms a stop for the stop tongue 31 that projects in the opposite direction towards the rod arm section 26. The locking section 22 terminates directly below the transverse tab 12 here.

[0099] The tension bow 20 is in turn latched to the busbar 4 with a retaining projection 25 at the release section 23.

[0100] Figure 16 Shows a perspective view of a holding and releasing element in the form of a tension bow 20 for the terminal 1 in Figures 12 to 15 .

[0101] The locking section 22 terminates in a central latching tab 29 which is coordinated with the stop tongue 31 for latching. For embodiments with a stop tongue 31 it is also conceivable that the locking section 22 does not taper at its free end and thus does not have a specific holding profile.

[0102] Figure 17 Shows a perspective view of a cage spring 5 of a third embodiment for the terminal 1 in Figures 12 to 15 .

[0103] It can be seen that in the cage spring 5 the stop tongue 31 is exposed in the central region in the transverse tab 12 and is bent from the plane towards the support leg 6.

[0104] Other modifications are equally conceivable, for example in which at least one stop tongue 31 is bent at one or both edge regions of the transverse tab 12. A modification is also conceivable in which the free end of the clamping section 10, i.e. the transverse tab 12, is bent towards the support leg 6 at its end in order to form a stop tongue 31.

[0105] List of reference numerals

[0106] 1 Terminal

[0107] 2 Insulation housing

[0108] 3 Spring force clamping connection

[0109] 4 Busbar

[0110] 5 Cage spring

[0111] 6 Support leg

[0112] 7 Spring bow

[0113] 8 Clamping leg

[0114] 9 Operating section

[0115] 10 Clamping section

[0116] 11 Cut-out

[0117] 12 Transverse tab

[0118] 13 Clamping area

[0119] 14 Busbar end

[0120] 15 Operating opening

[0121] 16 guiding wall

[0122] 17 side wall

[0123] 18 bottom plate

[0124] 19 edge tab

[0125] 20 tension bow

[0126] 21 pivot support part

[0127] 21a support pin

[0128] 21b support opening

[0129] 22 locking section

[0130] 23 release section

[0131] 24 wire introduction opening

[0132] 25 retaining projection

[0133] 26 rod arm section

[0134] 27 stop

[0135] 28 centering pin

[0136] 29 latching tab

[0137] 30 locking opening

[0138] 31 stop tongue

[0139] F alignment line

[0140] L wire introduction direction

Claims

1. A spring force clamping connection member (3), the spring force clamping connection member having: - A bus bar (4), the bus bar having a clamping region (13), and - A cage spring (5), the cage spring having a support leg (6) for abutting against a first side of the bus bar (4), a spring bow (7) connected to the support leg (6), and a clamping leg (8) connected to the spring bow (7), wherein the clamping leg (8) has an operating section (9) connected to the spring bow (7) and extending away from the bus bar (4), and a clamping section (10) bent from the operating section (9) and extending back towards the bus bar (4), wherein the clamping section (10) has a void (11), the void being delimited by a transverse tab (12) at a free end of the clamping section (10), wherein the bus bar (4) extends through the void (11) with its clamping section (10), and the transverse tab (12) and the clamping section (10) together form a clamping site for clamping an electrical wire. It is characterized in that There is a pivotally supported release element (20), the release element having a release section (23) and a locking section (22), the release section being configured to pivot the release element (20) by a force action achieved by means of an inserted electrical wire to be clamped, wherein when the cage spring (5) is in an open state, the locking section (22) forms a stop for a holding profile (12, 30, 31) of the clamping section (10) in a locked pivoted attitude of the release element (20), in the open state, the clamping site is opened by displacing the operating section (9) towards the support leg (6) and spacing the transverse tab (12) from the clamping region (13) of the bus bar (4), and wherein the release section (23) forms a rotation prohibition section in the locked pivoted attitude, the rotation prohibition section preventing pivoting of the release element (20), and the release section being configured to cancel the rotation prohibition section by a release force applied to the release section (23) by the action caused by the inserted electrical wire to be clamped, so as to release the release element (20) for pivoting away from the clamping section (10) to cancel the stop.

2. The spring force clamping connection member (3) according to claim 1, characterized in that, The release section (23) extends transversely to a plane of the support leg (6) abutting against the bus bar (4).

3. The spring force clamping connection member (3) according to claim 1 or 2, characterized in that, The locking section (22) extends away from the release section (23) towards the clamping section (10) in its open position.

4. The spring force clamping connector (3) according to any one of claims 1 to 3, characterized in that, The holding profile of the clamping section (10) is formed by the transverse tab (12), wherein the locking section (22) extending into the void (11) in the locked state forms a stop for the transverse tab (12).

5. The spring force clamping connection member (3) according to any one of claims 1 to 3, characterized in that, The clamping section (10) has a locking opening (30) in the transverse tab (12), in the edge tab (19) that laterally bounds the cut-out (11), or in the region of the clamping section (10) extending from the cut-out (11) to the operating section (9), wherein the locking opening (30) forms the retaining profile and the locking section (22) that projects into the locking opening (30) in the locking pivoted position forms a stop for the clamping section (10).

6. The spring force clamping connection member (3) according to any one of claims 1 to 3, characterized in that, At the clamping leg (8), a stop tongue (31) projects from the plane of the clamping leg (8), the stop tongue forming the retaining profile, wherein the locking section (22) is arranged between the stop tongue (31) and the operating section (9) in the locking pivoted position and forms a stop for the stop tongue (31).

7. The spring force clamping connector (3) according to any one of claims 1 to 6, characterized in that, A pivot bearing (21) is formed between the locking section (22) and the release section (23) of the release element (20), wherein the release element (20) is rotatably supported about the pivot bearing (21) spaced apart from the bus bar (4) on the second side of the bus bar (4) and adjacent to the clamping section (10) in the open state of the cage spring (5), the second side being opposite to the first bearing side of the bus bar (4) against which the support leg (6) abuts.

8. The spring force clamping connection member (3) according to any one of the above claims, characterized in that, The release element (20) is arranged spaced apart from the bus bar (4) with its locking section (22) and extends towards the clamping section (10) in the open state of the cage spring (5), and a pivot bearing (21) and an arm section (26) extending spaced apart from the bus bar (4) in the wire insertion direction (L) are connected to the locking section (22), the arm section transitioning into a release section (23) extending transversely towards the bus bar (4).

9. The spring force clamping connector (3) according to claim 8, characterized in that, The release section (23) passes by the bus bar (4) and extends to the first side of the bus bar (4) and has a retaining projection (25), the retaining projection being latched with the bus bar (4) or the support leg (6) and preventing pivoting of the release section (23) in the locking pivoted position of the release element (20), wherein the retaining projection (25) can be unlocked by a release force applied to the release section (23) by the inserted electrical wire.

10. The spring force clamping connection member (3) according to any one of the above claims, characterized in that, The release element (20) is elastic and configured to apply a restoring force to the release element (20), by which the locking section (22) is displaced into the locking pivoted position with the clamping section (10).

11. The spring force clamping connector (3) according to claim 10, characterized in that, An elastic restoring section extends from the release section (23) towards the bus bar (4) and can be supported at the bus bar (4).

12. The spring force clamping connection member (3) according to claim 11, characterized in that, The release element (20) is U-shaped, wherein the release section (23) transitions on the one hand into the lever arm section (26) and on the other hand into a spring arm section, and the lever arm section transitions via the pivot bearing (21) into the locking section (22), wherein the release section (23) extends transversely to the longitudinal extension direction of the busbar (4) or the support leg (6).

13. A terminal (1) having an insulating material housing (2) and having a spring force clamping connection (3) according to any one of the preceding claims in the insulating material housing (2), wherein the insulating material housing (2) has a wire introduction opening (24) leading to the release section (23) of the release element (20).

14. The terminal (1) according to claim 13, characterized in that, The release element (20) is pivotally supported in the insulating material housing (2) by means of its pivot bearing (21).

15. The terminal (1) according to claim 13 or 14, characterized in that The insulating material housing (2) has an operation opening (15) which is directed towards the operation section (9) of the clamping leg (8).

16. The terminal (1) according to claim 15, characterized in that, The operation opening (15) is configured to receive an operating tool or an operating element which can be movably inserted into the operation opening.

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