EP3028344B1 - Electrical terminal and method - Google Patents

Description

The present invention relates to an electrical connection terminal and a method for connecting a conductor to a connection terminal.

Various connection terminals have become known in the prior art which are also suitable for connecting conductors with large diameters. For example, conductors with large cross-sections can be connected to screw terminals. The conductor is clamped to the electrical connection terminal via a screw connection. A disadvantage of such screw terminals, however, is that the stripped conductor cannot easily be pivoted in from above. Particularly in the case of large and solid conductors, this makes assembly considerably more difficult, since the conductor has to be bent over and inserted axially from the front into the screw terminal before the conductor can be clamped.

In contrast, assembly is easier with an electrical connection terminal that allows a conductor to be connected to be pivoted in from above. The conductor to be connected can be shortened to the appropriate length beforehand and is then swiveled in during assembly.

With the WO 2013/004343 A1 such a connection terminal has become known. In this electrical connection terminal, a hand lever and a clamping lever are provided, which are connected to one another via a dynamic transmission ratio, so that at the beginning of the closing process a relatively small movement of the hand lever is caused by a large movement of the clamping lever, while at the end of the closing process a large movement of the Hand lever at a relatively low level Movement of the clamping lever leads. With this lever clamp, a good compromise between opening angle and operating force is achieved. Further connection terminals are from the DE 10 2011 106432 A1 , DE 10 2006 043276 A1 and U.S. 4,589,722 A known.

Compared to the known prior art, the object of the present invention is to provide an electrical connection terminal which enables a larger opening area and / or a lower actuation force.

This object is achieved by an electrical connection terminal with the features of claim 1. The method according to the invention is the subject matter of claim 10. Preferred embodiments are the subject matter of the subclaims. Further advantages and features of the present invention emerge from the general description and the description of the exemplary embodiment.

An electrical connection terminal according to the invention is used for the electrically contacting connection of at least one conductor to a current bar which is received on a holder. Furthermore, an actuating lever for opening and closing the connection terminal and a clamping lever and a clamping spring for clamping the conductor are provided. The actuating lever acts on the clamping lever, the clamping lever being held on the holder in a pivotable manner via a pivot axis. According to the invention, the holder has two lateral walls, a link guide being provided in both lateral walls, which includes at least one locking link and a clamping link branching off therefrom. The actuating lever is movably received or guided therein with a first axis and a second axis in the link guide. The link guide includes a release link that branches off transversely from the closing link, whereby in particular, the release gate and the tension gate extend in opposite directions. The release gate, the tension gate and at least the part of the closing gate that connects the release gate and the tension gate to one another have an "S" -shaped shape.

The electrical connection terminal according to the invention has many advantages, since it offers a simple and flexible connection option for electrical conductors, including large diameters, and allows reliable contact. The guidance of the actuating lever in a link guide allows on the one hand to close the connection terminal largely and essentially without force when connecting a conductor and then to apply a high clamping force when the actuating lever is transferred from a closing link to the clamping link.

This provides a simple electrical connection terminal that meets the requirements. The electrical connection terminal according to the invention provides a type of toggle lever terminal.

The holder has two side walls, which are preferably aligned at least approximately parallel to one another. The link guide is preferably provided at least partially identical or completely identical in both side walls. This means that the actuating lever is guided in both side walls. The guide in the locking link is used for closing, with a large path being overcome without force or with only relatively little effort. The transfer of the first axis into the clamping link ultimately leads to the application of the necessary clamping force.

The connection terminal has a free pivoting area for a conductor. The free pivoting area, which is open at the top, is not impaired by the bracket or a housing. An opening angle between the current bar and the clamping edge in the open state is preferably at least 45 °. In particular, the opening angle or the maximum opening angle is greater than 60 ° and preferably greater than 75 °. Opening angles of 90 ° and even more than 90 ° are possible and preferred. The large opening angles and a pivoting area that is freely accessible at the top enables simple assembly even of ladders with large cross-sections, since the ladder can simply be viewed from "above", i.e. H. can be swiveled into the connection terminal from the side opposite the current bar. It is not necessary to bend the conductor, which is usually rigid, and then push it back into the connection terminal from the front.

In preferred developments, the locking link extends essentially transversely to the current bar. The angle between the closing link and the current bar is in particular greater than 30 ° and preferably greater than 45 ° and particularly preferably greater than 60 ° or greater than 75 °. The larger the angle between the closing link and the current bar, the greater the distance covered in the clamping direction when closing.

The link guide includes a release link that branches off transversely from the closing link. The release link and the tension link preferably extend in opposite directions. Such a configuration makes it possible for the first axis of the actuating lever to dip into the clamping slot when it is closed and for the second axis of the actuating lever to enter the release slot immersed. As a result, a pivoting of the actuating lever is used to close the connecting terminal, whereby high clamping forces can be generated. The closing gate, the clamping gate and the release gate are gate arms of the gate guide. The link arms form guide arms in the holder, within which the first axis and the second axis of the actuating lever can move in a guided manner.

The release gate, the tension gate and at least the part of the closing gate that connects the release gate and the tension gate to one another, form an overall approximately S-shaped configuration. If the first axis of the actuating lever dips into the clamping link and the second axis of the actuating lever dips into the release gate, a rotation of the actuating lever about a virtual central axis of the actuating lever is achieved overall. This enables a space-saving design.

In preferred configurations, the first axis has a larger diameter than the second axis. The first axis preferably has a larger diameter than a width of the release link. The second axis particularly preferably has a smaller axis than this width of the release link. Such a development ensures that the first axis cannot be inserted into the release link. The second axis, however, can be swiveled into the release gate. It is preferred that the width of the release link at the branch point from the closing link is smaller than the diameter of the first axis, so that the first axis is prevented from dipping into the release link. It is also possible, however, for the minimum width of the release gate to be at a small distance from the branch point. Then at least one prevents deep immersion. In the further course, the release gate can again have a greater width.

In particularly preferred refinements, in the clamped state, the first axis is located in the clamping slot and the second axis is located in the release slot. It is also preferred that both the first axis and the second axis are located in the locking link in the open state. As a result, when changing from the open state to the clamped state, linear guidance is initially made possible, so that on the one hand a large opening angle of the connection terminal is made possible, while on the other hand the required actuation travel is relatively small.

In all of the configurations, provision is made for a clamping lever to be provided in addition to the actuating lever. The actuating lever acts on the clamping lever when it is closed. The clamping lever is received in the holder in a pivotable manner via a pivot axis. The clamping lever can have at least one clamping edge in order to clamp an inserted conductor against the current bar.

Because a clamping lever is also used in addition to the actuating lever, a particularly effective transmission ratio can be made available. First, when closing, the actuating lever is guided with both axes in the closing guide, whereby the clamping lever is pivoted through a large pivot angle. Subsequently, when the first axis of the actuating lever is transferred into the clamping link, the actuating lever is pivoted while the actuating lever acts on the clamping lever. A high force transmission is made available by an eccentric on the actuating lever, so that high clamping forces even with relatively low actuating forces are applicable. The actuating lever acts on the clamping lever via the eccentric.

It is particularly preferred that the clamping spring acts on the first axis and the pivot axis in the clamped state. In the clamped state, the clamp spring is preferably pretensioned and applies the necessary clamping force permanently and reliably to the clamping lever. It is particularly preferred that the clamping lever is located behind a dead point in the clamped state. This means that in the clamped state there is a self-locking, in which any pivoting of the clamping lever initially requires an expenditure of force. This means that both when trying to close the clamping lever further and also to open it again, an increased force must first be applied, in that the clamping spring first has to be opened further against its clamping force, for example.

In particularly preferred refinements, the first axis rests against the clamping spring in the clamped state. It is also particularly preferred that the first axis is arranged at a distance from the clamping spring in the open state. This is preferably implemented in that the clamping spring has an approximately C-shaped configuration overall. When the connection terminal is closed, the first axis and the second axis of the actuating lever are first guided in the locking link, so that the actuating lever moves with the first and second axis towards the current bar. During this movement, the first axis dips between the two ends of the clamping spring. The actuation lever is then pivoted so that the first axis plunges into the clamping link and the second axis into the release link. When pivoting further, the first axis is pressed against an arm of the clamping spring, so that the The clamping spring is biased during further pivoting of the operating lever and applies the required clamping force.

When the electrical connection terminal is opened, the sequence is reversed, so that the first axis relieves the leg of the clamping spring and finally moves away from it. When moving further into the open state, it is finally moved out of the cross section of the clamping spring. However, it is also possible that the first axis remains constantly within the cross section of the clamping spring spanned by the two legs and does not rest against the clamping spring in the open state, while in the clamped state it lies directly or indirectly against one leg of the clamping spring in order to preload the clamping spring.

In preferred developments, the actuating lever has at least one tool opening. For example, the tool opening can be suitable for receiving a screwdriver or a similar rod-shaped tool, so that the actuation lever can be actuated via a tool inserted into the tool opening.

Bent lugs can be provided on the actuating lever. It is also possible that at least one axle is received on the actuating lever, which axle serves as a counter bearing during actuation. For example, the actuation lever can have bent tabs and / or at least one pin as a counter bearing, so that an effective force transmission takes place from a tool received at the tool opening to the actuation lever.

In preferred developments, at least one return spring is provided which preloads the actuating lever into the open position or the open state. In According to preferred embodiments, the return spring is arranged in such a way that the return spring increases the clamping force in the clamping state. This is advantageous since the return spring does not reduce the clamping effect in the clamping state.

In all of the configurations, it is particularly preferred that the holder and the clamping lever and the actuating lever are each punched bent parts. Simple and inexpensive production is also made possible. An inexpensive assembly is also made possible. At the same time, stable components are made available that also allow a large number of opening and closing processes without damage.

In particularly preferred further developments, at least one groove is provided on the current bar to secure an inserted conductor. Furthermore, at least one conductor guide is preferably provided for centering a conductor received on the current bar. It is possible and preferred that the groove is positioned on the current bar where the clamping edge presses against an inserted conductor. This causes a local bending of the conductor into the groove, especially with thinner conductors, so that the necessary pull-out force is significantly increased. The conductor routing for centering causes a reproducible central mounting of a conductor, so that reproducible conditions and unequal loads are avoided. For example, two conductor guides can be provided at an angle of 120 ° in a V-shaped structure in order to center inserted conductors.

The method according to the invention is used to clamp at least one conductor to a connecting terminal in order to make electrically conductive contact with the conductor. A current bar is held on a holder of the connection terminal. An actuation lever is provided for actuation. A clamping lever is provided to clamp the inserted conductor against the current bar. At least one clamping spring is used to generate a clamping force. The actuating lever acts on the clamping lever, the clamping lever being held on the holder in a pivotable manner via a pivot axis. The actuating lever is movably guided with a first axis and with a second axis in a link guide which is provided in both side walls of the holder. To connect, the actuating lever is first guided with the first axis and the second axis in the locking link of the link guide. When reaching a clamping slot branching off transversely from the closing slot, the first axis is guided into the clamping slot in order to clamp the conductor. The actuating lever is first guided in a longitudinal direction and then pivoted. When pivoting, the second axis is immersed in a release gate branching off transversely from the closing gate.

The method according to the invention has the considerable advantage that the connection terminal is essentially closed when the first and second axes are guided within the locking slot, while the required clamping force is applied when the first axis is guided in the clamping slot. As a result, a particularly large transmission ratio is made available in a very simple manner. At the beginning of the closing process, the tool covers a relatively short path, which leads to a considerable closing movement, and then the tool covers a larger path with little effort, while the required high clamping force is generated on the connection terminal.

Overall, the electrical connection terminal enables a particularly large opening area and a low actuation force, since the electrical connection terminal is initially largely closed during the downward movement of the actuating lever serving as an eccentric or having an eccentric. The entire swivel angle is then used for clamping during actuation. In contrast to this, in the prior art at least part of a swivel angle was also used for clamping.

Because a large swivel angle can be used for tensioning during actuation, a particularly strong spring can be used which is suitable for applying high clamping forces.

Overall, a connection terminal is made available in which even thick and difficult to bend or non-displaceable connection lines can be swiveled into such a connection terminal. This means that the electrical connection terminal can also be used to connect connection lines that cannot otherwise get into the terminal body.

Further advantages and features of the present invention emerge from the exemplary embodiment which is explained below with reference to the accompanying figures.

Fig. 1

eine schematische perspektivische Darstellung einer erfindungsgemäßen elektrischen Anschlussklemme mit angesetztem Werkzeug;

Fig. 2

eine vergrößerte Darstellung der elektrischen Anschlussklemme nach Fig. 1;

Fig. 3

eine Seitenansicht der elektrischen Anschlussklemme nach Fig. 1;

Fig. 4

eine Vorderansicht der elektrischen Anschlussklemme nach Fig. 1;

Fig. 5

eine Draufsicht auf die elektrische Anschlussklemme nach Fig. 4;

Fig. 6

einen Querschnitt gemäß der Schnittlinien A - A aus Fig. 5;

Fig. 7

eine stark schematische Seitenansicht der elektrischen Anschlussklemme nach Fig. 1 in einer ersten Stellung;

Fig. 8

eine stark schematische Seitenansicht der elektrischen Anschlussklemme nach Fig. 1 in einer zweiten Stellung;

Fig. 9

eine stark schematische Seitenansicht der elektrischen Anschlussklemme nach Fig. 1 in einer dritten Stellung; und

Fig. 10

eine stark schematische Seitenansicht der elektrischen Anschlussklemme nach Fig. 1 in einer vierten Stellung.

In the figures show:

Fig. 1

a schematic perspective illustration of an electrical connection terminal according to the invention with an attached tool;

Fig. 2

an enlarged view of the electrical connection terminal according to Fig. 1 ;

Fig. 3

a side view of the electrical connection terminal according to Fig. 1 ;

Fig. 4

a front view of the electrical connection terminal according to FIG Fig. 1 ;

Fig. 5

a plan view of the electrical connection terminal according to Fig. 4 ;

Fig. 6

a cross section according to the section lines A - A Fig. 5 ;

Fig. 7

a highly schematic side view of the electrical connection terminal according to FIG Fig. 1 in a first position;

Fig. 8

a highly schematic side view of the electrical connection terminal according to FIG Fig. 1 in a second position;

Fig. 9

a highly schematic side view of the electrical connection terminal according to FIG Fig. 1 in a third position; and

Fig. 10

a highly schematic side view of the electrical connection terminal according to FIG Fig. 1 in a fourth position.

Figure 1 shows a schematic perspective illustration of an electrical connection terminal 100 with an inserted Cable 125 with several conductors 126. A tool 120 in the form of a screwdriver is inserted into the actuating lever 103 of the electrical connection terminal 100 in order to transfer the electrical connection terminal 100 into a clamped state 145.

In the clamped state 145 ( Fig. 10 ) the clamping lever 102 clamps the inserted conductors 106 against the current bar 110. The current bar 110 is received on the holder 108, which can be surrounded by a plastic housing, not shown here. The connection terminal 100 can be designed as a series terminal.

The clamping lever 102 is pivotably received on the holder 108 via an axis 111. One leg 136 of the clamping spring 101 rests on the axis 111 (see also Fig. 7 ).

The operating lever 103 has (cf. Fig. 2 ) a tool opening 109. A first axis 130 and a second axis 131 are provided on the actuating lever. A link guide 114 is provided in the housing, which includes a closing guide 104, which is linearly aligned here and extends transversely to the current bar 110. At the lower end of the closing link 104, a clamping link 105 branches off into which the first axis 130 is immersed. The second axis 131 is immersed in the release gate 106, which also branches off from the closing gate 114.

The first axis 130 rests on the leg 137 of the clamping spring 101 (cf. Fig. 7 ), so that during the further pivoting movement with the tool 120, the clamping spring 101 is tensioned when the first axis 130 continues to move in the tensioning link 105.

Fig. 2 FIG. 11 shows a schematically enlarged illustration of the electrical connection terminal 100 from FIG Fig. 1 .

The locking link 104 comprises a first part 104a and 104b. The part 104a extends from the branch of the release gate 106 upwards and the second part 104b extends from the branch of the release gate 106 downwards. At the lower end of the closing link 104, the clamping link 105 branches off, into which the first axis 130 is inserted during tensioning. The second axis 131, on the other hand, dips into the release gate 106 during tensioning.

At the upper end of the holder 108 a hole 107 is provided for an axle 133 (shown in dashed lines), on which a return spring 135, not shown here, engages in order to bias the actuating lever 103 into the open position. Like the holder 108, the clamping lever 102 is designed as a stamped and bent part. The clamping lever 102 has two lateral walls 116 and 117 which are spaced apart from one another and are parallel here. The clamping lever 102 is pivoted about the axis 111, which is received on the holder 108.

Fig. 3 shows a side view of the electrical connection terminal 100. It can be seen that the outer diameter 140 of the first axis 130 is greater than the outer diameter 141 of the second axis 131. In particular, the outer diameter 140 of the first axis 130 is greater than the width 142 of the release gate 106 at the branch point 138 from the closing gate 104. This prevents the first axis 130 from being inadvertently immersed in the release gate 106.

When moving from an upper open position to a clamped state, the actuating lever 103 is moved downward with the first axis 130 and the second axis 131. When the first axis 130 reaches the bottom of the closing link 104, the second axis 131 reaches the branch of the release link 106. Following this, the first axis 130 can dip into the clamping link 105, while the second axis 131 when the actuating lever 103 is pivoted into the Release gate 106 is performed.

The actuation lever 103 has the tool opening 109 into which a tool 120 can be inserted.

Like the front view Fig. 4 can be removed, integrally formed bent tabs 122 and 123 are provided on the actuating lever 103, which form a counter bearing for an inserted tool.

In the front view of the electrical connection terminal 100 it can be seen that the clamping spring 101 extends outside the holder 108 over the entire width of the holder 108. This achieves a particularly high level of strength.

In the top view according to Fig. 5 the tool opening 109 in the actuating lever 103 can be seen from above. Furthermore, the bent tabs 122 and 123 are visible as a counter bearing for a tool.

Fig. 6 shows section AA Fig. 5 . The front wall of the holder 108 is cut away. The clamping spring 101 has a constriction 118. The clamping spring 101 engages behind the axis 111 of the leg 136 Clamping lever 102. The other leg 137 of the clamping spring 101 rests on the first axis 130 of the actuating lever 103 in this state. The restoring spring 134 between the axis 107 and the second axis 131 is shown here in dashed lines and, after the actuating lever 103 has been pivoted back, is used to automatically transfer the actuating lever 103 into the open position. A preloading of the clamping lever 102 into the open position is also brought about via a suitably suitable spring.

Below the clamping edge 119 of the clamping lever 102, a groove 113 and a guide 112 can be seen on the current bar 110. The groove 113 has the effect that conductors with, in particular, smaller diameters are received in a particularly pull-out manner, since they are pressed into the groove by the clamping edge 119. The guide 112 centering recorded conductors on the current bar 110.

With reference to the Figures 7 to 10 the function of the electrical connection terminal 100 is explained below. They show Figures 7 to 10 different positions and positions of the electrical connection terminal 100, each in a highly schematic form. The holder 108 and other parts have been omitted in order to increase the clarity.

Fig. 7 shows the electrical connection terminal 100 approximately in the open state 144. One leg 136 of the clamping spring 101 engages behind the pivot axis 111 of the clamping lever 102, while the other leg 137 is exposed. The actuating lever 103 is located far above the clamping spring 101. The first axis 130 and the second axis 131 are located in the locking link 104 of the link guide, not shown here 114. In this position a conductor can be swiveled into the wide open connection terminal from above.

The opening angle 146 between the current bar 110 and the clamping edge 1119 of the clamping lever 102 is far more than 75 ° here and even 90 ° here. Depending on the geometrical design of the clamping lever 102, the opening angle 146 can also be selected to be even larger or also somewhat smaller. As a rule, however, an opening angle 146 of 75 ° is sufficient to also be able to pivot particularly rigid conductors 126 with large cross-sections into the pivoting area 115 from above. Each ladder can be swiveled in at an opening angle of 90 °.

By moving the actuating lever 103 essentially downward along the arrow 134, the connection terminal moves from the open state Fig. 7 in the state after Fig. 8 convicted. The clamping lever 102, which is open by approximately 90 °, is pivoted by almost 45 °, since the clamping lever 102 of the eccentric cam 129 comes into contact with the sliding edge 127 of the clamping lever 102 and thus ensures a wide pivoting of the clamping lever 102.

In the representation according to Fig. 8 the first axis 130 begins to immerse into the cross section of the clamping spring 101 spanned by the legs 136 and 137.

With the further downward movement of the first axis 130 and the second axis 131 along the locking link 104 of the link guide 114, the contact of the eccentric cam 129 with the clamping cam 128 of the clamping lever 102 causes the clamping lever 102 to close to a large extent the closing gate 104 and the second axis 131 reaches the junction of the release gate 106.

A pivoting movement of the actuating lever 103 then ensues, with the first axis 130 dipping into the clamping slot 105 and the second axis 131 immersing into the release slot 106. The first axis 130 presses against the leg 137 of the clamping spring 101 and tensions the clamping spring 101, while at the same time the eccentric cam 129 is in contact with the clamping cam 128 of the clamping lever 102 and ensures a further pivoting of the clamping lever 102, so that the clamping edge 119 against the Conductor 126 of cable 125 is depressed as shown in FIG Fig. 9 is shown.

Fig. 10 shows the clamping state 145, in which the clamping spring 101 is tensioned and ensures that the clamping state 145 is maintained. The alignment of the actuating lever 103 and the clamping lever 102 is such that self-locking is achieved, so that after removing the tool 120 from the tool opening 109, the set state is safely maintained until the tool 120 is inserted again and the opposite movement occurs electrical connection terminal 100 is opened again.

The invention enables a connection terminal 100 with a large opening angle, while the electrical connection terminal 100 can be closed again at the same time with a low actuation force. Because the actuating lever 103 can initially be lowered with practically no force, the pivoting path is available for generating a high clamping force. List of reference symbols Terminal 100 Clamp spring 101 Clamping lever 102 Operating lever, eccentric 103 Closing gate, gate arm 104 Clamping gate, gate arm 105 Release backdrop, backdrop arm 106 hole 107 bracket 108 Tool opening 109 Current bar 110 Swivel axis 111 guide 112 Groove 113 Backdrop 114 Straight 115 wall 116 wall 117 Constriction 118 Clamping edge 119 Tool, screwdriver 120 Tab 122 Tab 123 electric wire 125 ladder 126 Sliding edge 127 Clamping curve 128 Eccentric curve 129 First axis 130 Second axis 131 axis 132 axis 133 arrow 134 Return spring 135 leg 136 leg 137 Branch point 138 diameter 140 diameter 141 width 142 Opening state 144 Clamped condition 145 Opening angle 146

Claims (10)

1. Connection terminal (100) for connecting at least one conductor (126) in an electrically contact-making manner to a current bar (110) which is held on a holder (108), wherein an operating lever (103), a clamping lever (102) and a clamping spring (101) are provided, wherein the operating lever (103) acts on the clamping lever (102), wherein the clamping lever (102) is held on the holder (108) such that it can pivot by means of a pivot spindle (111),
   characterized
   in that the holder (108) has two side walls, wherein a slotted link guide (114) is provided in both side walls, which slotted link guide comprises at least one closing slotted link (104) and one clamping slotted link (105) which branches away from the said closing slotted link in a transverse manner, and in that the operating lever (103) is guided by way of a first spindle (130) and a second spindle (131) such that it can move in the slotted link guide (114), wherein the slotted link guide (114) comprises a release slotted link (106) which branches away from the closing slotted link (104) in a transverse manner, wherein the release slotted link (106) and the clamping slotted link (105) extend in opposite directions, and wherein the release slotted link (106), the clamping slotted link (105) and at least that portion of the closing slotted link (104) which connects the release slotted link (106) and the clamping slotted link (105) to one another have an "S"-shaped configuration.
2. Connection terminal (100) according to the preceding claim, wherein the closing slotted link (104) extends substantially transversely in relation to the current bar (110) .
3. Connection terminal (100) according to either of the preceding claims, wherein the first spindle (130) has a larger diameter (140) than a width (142) of the release slotted link (106), and wherein the second spindle (131) has a smaller diameter (141) than the width (142) of the release slotted link (106).
4. Connection terminal (100) according to one of the preceding claims, wherein, in the clamping state (145), the first spindle (130) is located in the clamping slotted link (105) and the second spindle (131) is located in the release slotted link (106).
5. Connection terminal (100) according to one of the preceding claims, wherein the clamping spring (101) acts on the first spindle (130) and the pivot spindle (111) in the clamping state (145).
6. Connection terminal (100) according to one of the preceding claims, wherein the clamping lever (102) is located behind a dead centre position in the clamping state (145).
7. Connection terminal (100) according to one of the preceding claims, wherein the first spindle (130) bears against the clamping spring (101) in the clamping state (145) and is arranged at a distance from the clamping spring (101) in the open state (144).
8. Connection terminal (100) according to one of the preceding claims, wherein the operating lever (103) has a tool opening (109).
9. Connection terminal (100) according to one of the preceding claims, wherein bent-over tabs (122, 123) are provided and/or a spindle (132) is held on the operating lever (103) in order to provide a mating bearing during operation.
10. Method for connecting a conductor (126) to a connection terminal (100) in order to make electrically conductive contact with the conductor (126), wherein a current bar (110) is held on a holder (108) of the connection terminal (100), and wherein an operating lever (103) is provided for operating purposes, a clamping lever (102) is provided for clamping the inserted conductor against the current bar (110) and a clamping spring (101) is provided for generating a clamping force, wherein the operating lever (103) acts on the clamping lever (102), wherein the clamping lever (102) is held on the holder (108) such that it can pivot by means of a pivot spindle (111),
    characterized
    in that the operating lever (103) is guided by way of a first spindle (130) and a second spindle (131) such that it can move in a slotted link guide (114), which slotted link guide is provided in both side walls of the holder (108), and in that the operating lever (103) is initially guided by way of the first spindle (130) and the second spindle (131) in a closing slotted link (104) of the slotted link guide (114) for connection purposes, and in that, when a clamping slotted link (105) which branches away from the closing slotted link (104) in a transverse manner is reached, the first spindle (130) is guided into the clamping slotted link (105), wherein the operating lever (103) is initially guided in a longitudinal direction and is then pivoted, and wherein the second spindle (131) enters a release slotted link (106), which branches away from the closing slotted link (104) in a transverse manner, during pivoting, wherein the release slotted link (106), the clamping slotted link (105) and at least that portion of the closing slotted link (104) which connects the release slotted link (106) and the clamping slotted link (105) to one another have an "S"-shaped configuration.

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