DE102014119420B3 - terminal - Google Patents

Abstract

A terminal (1) for clamping an electrical conductor comprising: - an insulating housing (2) having at least one conductor insertion opening (13) leading to a spring-force clamping connection (3), - at least one spring-force clamping connection (3) in the insulating housing (2), which is formed from a busbar piece (4) and from a clamping spring (5), - at least one actuating lever (10), which is mounted with a pivot bearing (11) pivotable in the insulating housing (2) and the opening of a by the clamping spring ( 5) and the busbar piece (4) formed clamping point is described will be described. The pivot bearing (11) is formed of a curved path having a slot (20) in the insulating housing (2) and a in the slot (20) dipping the long pin (19) of the actuating lever (10). The long pin (19) has a greater length than its width and the length of the long pin (19) is greater in each pivot position of the actuating lever (19) than the corresponding width of the slot (20).

Description

• – einem Isolierstoffgehäuse, das mindestens eine Leitereinführungsöffnung hat, die zu einem Federkraftklemmanschluss führt,
• – mindestens einem Federkraftklemmanschluss in dem Isolierstoffgehäuse, der aus einem Stromschienenstück und aus einer Klemmfeder gebildet ist,
• – mindestens einem Betätigungshebel, der mit einem Schwenklager schwenkbar in dem Isolierstoffgehäuse gelagert ist und der zum Öffnen einer durch die Klemmfeder und das Stromschienenstück gebildeten Klemmstelle ausgerichtet ist.

The invention relates to a terminal for clamping an electrical conductor with

• An insulating housing having at least one conductor insertion opening leading to a spring force clamping connection,
• At least one spring-force clamping connection in the insulating material housing, which is formed from a busbar piece and from a clamping spring,
• - At least one actuating lever which is pivotally mounted in the insulating housing with a pivot bearing and which is aligned for opening a clamping point formed by the clamping spring and the busbar piece.

Terminals are in various forms known as terminal boxes for connecting electrical conductors to each other at a common busbar piece, terminal blocks, which can be latched onto a DIN rail, PCB terminals or connectors. To open a clamping point formed by a clamping spring and a busbar piece for clamping an electrical conductor, the clamping leg of the clamping spring must be displaced. This can be done either by a separate, introduced into an actuating opening of the insulating housing operating tool (for example, screwdriver). Often, however, a pivotable actuating lever is installed in the insulating housing of the terminals, which acts on the clamping spring to open the nip.

In general, the actuating lever are rotatably received about a defined axis of rotation in the insulating housing, as for example in DE 10 2007 050 936 B4 is disclosed.

Out DE 10 2011 110 640 B4 a conductor terminal is known in which the actuating lever is floatingly mounted in a lever bearing contour so that it can be displaced by a latching position.

US 2003/0008569 A1 discloses a terminal with an actuating lever which is rotatably received in an insulating material housing about a pivot located in the surface region of a pivot bearing portion in itself. A displacement of the pivot of the actuating lever is not provided.

DE 1 575 118 A shows a screwless clamp with an actuating lever whose lower right-angled end dips into a pocket of an insulating housing. The operating lever is pivotable about an edge of the pocket, so that the angling of the end of the operating lever forms a fulcrum.

In DE 299 08 384 U1 discloses a screwless terminal, in which a Isolierstoffbügel is mounted pivotably about a pivot axis and pivoting in a terminal housing. The swivel joint is formed by a slot provided at the foot end of the insulating strap and a stationary pivot pin guided in this slot, which is formed, for example, on the clamping housing within the clamping housing. As a result, the Isolierstoffbügel is simultaneously pivotable and radially displaceable, so that a guided by the insulating strap conductor deviates from a circular path substantially translationally moves.

In EP 0 253 239 A1 a screwless terminal is described in which a pressure piece to open a clamping spring has a cylindrical rounded pivot point at its foot. When pivoting the pressure piece, the pivot point moves aligned from the spring base on the plant leg of the leg spring upwards towards the busbar and away from the spring base. The pressure piece is in a spaced-apart from the pivot point area on the clamping leg of the leg spring to open it.

DE 10 2004 062 850 B3 discloses a connecting device with a pivotable rocker arm which can be moved at a bearing point to form an unrestrained free end stroke range of a clamping spring. The bearing is executed by oval bearing axles on both sides of the rocker arm, which are guided in corresponding bearing grooves in the housing portion and fixed in their freedom of movement. The bearing grooves describe a space within which a vertical displacement of the bearing axes can take place for distancing the pressure piece from the clamping point. In an actuating position, a pivoting force can be introduced at the actuating end of the rocker arm, which is forwarded via the bearing point to the pressure piece and the free end of the clamping spring.

Proceeding from this, it is an object of the present invention to provide an improved terminal with a compact design, in which with the least possible space for the pivot bearing an optimized kinematics of the operating lever is achieved.

The object is achieved with the terminal with the feature of claim 1. Advantageous embodiments are described in the subclaims.

It is proposed that the pivot bearing is formed from a slot and a long pin immersed in the slot. The slot has a curved track shape. The center line of the slot, ie the line running in the middle between the opposite side walls, is thus curved. The contour of the elongated hole and the long pin are preferably coordinated so that it is in any position of the long pin in the slot of the long pin at least two opposing support points in contact with the boundary wall of the slot and thereby an in-itself rotation of the long pin a lying in the spanned by the long pin surface portion axis of rotation is prevented.

The slot is preferably provided in the insulating housing and the long pin on the actuating lever. It is also conceivable, however, the reverse variant in which the slot is formed on the actuating lever and the long pin on the insulating material.

In contrast to the conventional Achslagerung in which the actuating lever is pivoted about a defined fixed axis of rotation, according to the teaching of the following invention, such a pivoting movement about a lying in the surface portion of the pin pivot (rotation axis) can be prevented. Rather, it is proposed that the actuating lever executes by the provision of a long pin no sole rotational movement, but at least also or preferably only a translational movement during pivoting. This has the advantage that the pivot radius is converted into a relatively large displacement of the clamping spring. In addition, the translational movement can be used to hold the operating lever, especially in the open position without additional locking elements, even if the actuating lever is acted upon by the force of the clamping spring.

The long pin has a greater length than its width. The length of the long pin is greater than the width of the slot.

The leadership of a long pin in a slot without a pure in-turn rotation of the long pin thus combines improved kinematics while requiring little space with a good implementation of the force acting on the operating lever operating force in a deflection force to open the clamping spring. In the context of the present invention, a long journal is understood to mean a bearing journal which extends in a length which is longer than the width of the long journal transversely to its longitudinal direction. Such a long pin is preferably formed as an oval with rounded end faces, wherein the rounded end faces are opposite to the ends in the longitudinal direction.

Similarly, a slot according to the present invention differs from a circular hole in that it is designed to receive the long pin and allows a translational movement of the long pin in the slot. A sole rotational movement of the long pin in the slot about a fixed axis of rotation is preferably prevented by the contours of slot and long pins are coordinated so that the long pin in any position of the long pin in the slot at least two opposing support points in contact with the Limiting wall of the slot is. The long pin can not turn in the slot with it. The movement of the long pin in the slot is rather limited to a superimposed rotational and translational movement or preferably to a purely translational displacement movement. In such a sliding movement, the pivot angle of the actuating lever changes, so that a rotation of the long pin is effected about a migratory fulcrum. Such a rotation is only possible by moving the long pin in the slot.

It is particularly advantageous if the long pin spans an oval surface. The oval surface may be, for example, an elliptical surface. However, it is particularly advantageous if the oval surface is a surface formed from a rectangle and two circular sections at the opposite ends of the rectangle in the longitudinal extension. The opposite longitudinal sides of the long pin are thus straight, flat surfaces, which merge on opposite end faces in curved end faces. Unlike a purely elliptical surface of the long pin, in which the opposite longitudinal sides are curved, it is proposed in this preferred embodiment that the opposite longitudinal sides are rectilinear.

The slot has, for example, a kidney-shaped surface. Such a kidney-shaped surface in the sense of the present invention is a curved oval, which is curved in the manner of a ball triangle and has blunt, curved ends instead of the pointed corners of a ball triangle. Such a kidney-shaped surface initially extends in a first direction starting from a first curved end side, in order to continue after a development preferably in the range of 90 ° +/- 10 ° in a direction transverse to the first direction second direction and at a curved end complete. In such a kidney-shaped surface, two circular sections are interconnected by a short curved track and an opposite long curved track.

The short curved path of the kidney-shaped surface is preferably located on the side facing the mouth of the conductor insertion opening and the clamping point and the clamping edge of the clamping spring facing away. The long curved path is then preferably on the side facing the nip or the clamping edge of the clamping spring and facing away from the Isolierstoffgehäuse outward opening of the conductor insertion opening facing away.

It is particularly advantageous if the pivot bearing of an actuating lever is formed by two elongated holes lying opposite one another in the insulating material housing, into which each of the side faces of the actuating lever facing away from each other project outstanding long pins. Thus, the operating lever is guided on both sides on its side surfaces tilt-proof and stable in the insulating housing.

It is also conceivable, however, the reverse variant, in which the pivot bearing of an actuating lever is formed by two opposing slots in the side surfaces of the actuating lever, in each of which dive in the interior of the insulating material of a boundary wall outstanding, facing each other long pins.

It when the at least one slot is introduced into a boundary wall of the conductor insertion opening is particularly advantageous. The slot is filled in the open position of the actuating lever by the long pin so that the long pin forms a continuation of the boundary wall of the conductor insertion opening for guiding an electrical conductor to the nip. In this way, the electrical conductor is performed with open nip by the boundary wall of the conductor insertion opening and in continuation by a wall surface of the long pin. This is particularly advantageous for finely stranded or stranded electrical conductors, since immersion of strand ends is prevented in the slot. In the closed position of the actuating lever, in which the clamping point is closed for clamping an electrical conductor, the guide wall of the conductor insertion opening, however, may be interrupted by the slot again. Then there is no need for a guide of an electrical conductor.

The invention will be explained in more detail with reference to an embodiment with the accompanying drawings. Show it:

1 - Side sectional view of a terminal with operating lever in the closed position;

2 - Side sectional view of the terminal off 1 with operating lever in the half-open position;

3 - Side sectional view of the terminal off 1 and 2 with operating lever in open position;

4 - Cross-sectional view of the terminal off 1 in the closed position;

5 - Cross-sectional view of the terminal off 3 in the open position;

6 - Perspective view of the actuating lever and the clamping spring of the terminal;

7 - Perspective view of the operating lever and the clamping spring 6 with a view from the beginning.

1 shows a side sectional view of a terminal 1 with an insulating material housing 2 into which a spring-cage connection 3 is installed. The spring force terminal connection 3 becomes from a busbar piece 4 and a clamping spring 5 educated. The clamping spring 5 is a leg spring, the one at the busbar piece 4 superimposed investment thighs 6 , a feather bow 7 at the busbar piece 4 opposite side of the plant leg 6 and one from the spring bow 7 outgoing clamping legs 8th Has. The clamping leg 8th has a clamping edge at its free end 9 pointing to the busbar piece 4 is aligned so that a clamping point for clamping an electrical conductor between the clamping edge 9 of the clamping leg 8th and the busbar piece 4 is formed.

In order now to open this terminal point for removing a clamped electrical conductor and this the clamping edge 9 from a clamping projection on the busbar piece 4 away in the direction of the plant thigh 6 to move away is an operating lever 10 with a pivot bearing 11 pivotable in the insulating housing 2 built-in.

The installation of the operating lever 10 and the spring force terminal connection 3 succeeded by a two-part construction of the insulating material 2 that is a basic body 12 with a Conductor insertion opening 13 and one with the main body 12 by means of locking elements 14 latchable lid piece 15 Has. The conductor entry opening 13 extends in Leitereinsteckrichtung 11 and has one of the Isolierstoffgehäuse 2 outward opening 16 , The conductor entry opening 13 extends to the busbar piece 4 the clamping point to guide an electrical conductor to be clamped to the nip. In the lid part 15 is the Leiterereinsteckrichtung L seen behind the busbar piece 4 a ladder collecting bag 17 provided for receiving the stripped free end of the electrical conductor to be clamped.

The operating lever 10 has a lever arm 18 , the outside of the insulating material 2 protrudes and thus at least partially exposed to manual operation. The lever arm 18 goes in the interior of the insulating material 2 adjacent to the nip in a pivoting area over, to the at least one long pin 19 on at least one side of the actuating lever 10 protrudes laterally. In the illustrated embodiment, the long pin forms 19 that the lever arm 18 diametrically opposite end of the operating lever 10 , with the actuating contour of the clamping leg 8th or one of the clamping leg 8th exposed material flap for displacing the clamping leg 8th and its clamping edge 9 in the direction of the plant thigh 6 is applied to open the nip. The at least one long spigot 19 dives into an assigned slot 20 one, on an inner wall in the main body 12 or a wall of the conductor insertion opening 13 in the main body 12 is introduced. In the illustrated embodiment are two opposing slots 20 in the opposite inner walls of the conductor insertion opening 13 introduced, in the diametrically pointing away from each other long pins 19 of the operating lever 10 immerse in order to store this non-tilting.

The long holes 20 are in the lower, on the plant leg 6 adjacent area preferably formed auslaufend. This is advantageous for demoulding and assembly reasons.

The seen in Leitereinsteckrichtung L rear (in 1 to 3 left) wall of the slot 20 is partially through the busbar piece 4 formed and not by insulating material of the insulating material 2 ,

It is recognizable that the slot 20 has a kidney-shaped contour. The long spigot 19 on the other hand is oval and has a longitudinal direction which is greater than the width of the long pin 19 is. The oval shape is formed from a rectangular surface portion, to which adjoin the opposite ends of partial circles, preferably semicircles.

The slot has a curved track shape and is curved for this purpose in the manner of a ball triangle. The ends of the ball triangle are part-circular. Thus, two circular sections at the opposite ends on the one hand by a short curved path on the side of the junction 16 the conductor entry opening 13 and on the other hand connected by a longer curved track on the side adjacent to the nip. The (imaginary) center line between the two opposing circular sections is also curved. The slot is thus kidney-shaped.

In the 1 is the operating lever 10 in the closed position, where the clamping edge 9 on the power point piece 4 rests without plugged electrical conductor and the clamping leg 8th is relieved and by the spring force of the clamping spring 5 against the busbar piece 4 is pressed.

2 leaves the terminal 1 recognize in the partially opened state. It becomes clear that the operating lever 10 is now pivoted at an angle of about 45 °. This is the clamping leg 8th by the actuating contour at the end of the actuating lever in the region of the long pin 19 Direction of plant leg 6 pressed.

During the movement of the long pin 19 in the slot 20 becomes the long pin 19 translatory in the slot 20 postponed. He lies, as well as in the closed position in 1 always, even during the entire pivoting movement at least two mutually opposite support points on the boundary walls of the slot 20 at. It is thus without an additional displacement of the long pin 19 not possible, the long pin 19 simply in one around the surface section of the slot 20 to turn lying axis of rotation (or fulcrum). A movement of the long pin 19 in the slot 20 is only possible by the opposing at least two support points, that the long pin 19 in the longitudinal direction of the elongated hole 20 on a curved path from a curved end portion of the slot 20 to the opposite way and to the opposite curved end portion of the slot 20 is moved.

3 leaves the terminal off 1 and 2 recognize when the operating lever 10 now in the open position, this is the Clamping leg as far as possible to the plant leg 6 pressed down by the clamping edge 9 and the busbar piece 4 completely open formed clamping point. Again, the long-pin is located 12 on opposite boundary walls of the slot 20 on so that an in-itself twisting of the long pin 19 not possible. This is due to the kidney-shaped in the illustrated embodiment of the elongated hole 20 ensured.

In the illustrated open position are the slots 20 on the opposite inner walls of the conductor insertion opening 13 now at least in the busbar piece 4 around the adjacent area by the long-pin 19 filled. This will ensure that one enters the conductor insertion opening 13 inserted electrical conductor is best guided with its stripped end to the terminal point and no strands or conductor ends in the slot 20 snag.

4 leaves a cross-sectional view of the terminal 1 out 1 recognize in the closed position or clamping position. It becomes clear that from the operating lever 10 on the opposite side surfaces diametrically opposite each long pin 19 protrude. These long cones 19 each dive into an assigned slot 20 to enter the slot 20 to be guided translationally displaceable. It is characterized by the contour of the long pin 19 and the contour of the slot adapted thereto 20 an in-turn of the long pin 19 prevented.

5 leaves a cross-sectional view of the terminal 1 out 3 recognizable in the open position. The lever arm 18 has gone up. The clamping leg 8th the clamping spring 5 is in the direction of the plant leg 6 pressed down so that the through the clamping edge 9 and the busbar piece 4 formed clamping point for clamping an electrical conductor is open. The displacement of the clamping leg 8th is achieved by the long pins 19 and / or the side edges of the adjacent sidewalls 22 of the operating lever, the clamping leg 8th apply.

6 lets a perspective view of the clamping spring 5 together with the operating lever 10 without surrounding insulating material housing. The operating lever 10 has two spaced sidewalls 22 passing through itself across the sidewalls 22 and longitudinally extending lever arm 18 connected to each other. On the outsides of the side walls 22 are on the lever arm 18 opposite ends of the long pins 19 as from the surface of the sidewalls 22 formed protruding elements. At the ends of the free ends of the side walls 22 and here molded long pins 19 the loading of the clamping spring takes place. These end faces form an operating area 21 at the end of the operating lever 10 , the lever arm 18 opposite and extending between the opposite long pins 19 extends. It is also clear that the connection area between the opposite long pins 19 concave, ie curved inwards. This provides a conductor receiving space leading to the clamping point.

It becomes clear that the space between the side walls 22 under half the lever arm 18 provides a clearance for guiding and receiving a stripped free end of an electrical conductor to be clamped. This then becomes the clamping edge 9 led to there by the clamping spring 5 to the busbar piece, not shown 4 to be clamped.

It becomes clear that the clamping edge 9 from the plane of the clamping leg 8th in the direction of the operating lever 10 is bent. The remaining lateral sections of the clamping leg 8th then form a bearing surface for acting on the clamping spring 5 through the operating lever 10 , The raised clamping edge 9 then lies in the space between the side walls 22 , It is also recognizable that the free end of the plant leg 6 is tapered so as to be in an opening of the busbar piece 4 to be hooked.

7 shows a slightly rotated perspective view of the clamping spring 5 with the operating lever 10 again without insulating housing. It becomes even clearer that the side walls 22 of the operating lever 10 on its opposite inner sides a guide wall for guiding an electrical conductor to the clamping edge 9 provide. On the outer walls of these side walls 22 are long cones 19 integrally formed. The longitudinal extent to the direction of the long pins 19 runs approximately parallel from the operating lever 18 spanned level. The long cones 19 are to the lever arm 18 in the direction of the clamping spring 5 offset in height.

From the 6 and 7 it can be seen that the lateral operating sections 23 on the clamping leg 8th the clamping spring 5 each up to the outer edge of the long pins 19 pass. Then these operating sections must 23 the clamping spring 5 in the slot 20 be recorded and the slot 20 is contoured accordingly.

In an optional embodiment, these operating sections 23 laterally made narrower. It is advantageous if they are at least about the depth of the long pin 19 in comparison to the illustration in 6 and 7 are shortened, so that the two operating sections 23 on the inner wall of the conductor entry in the insulating housing 2 can be guided along and not in the slot 20 have to dive.

Claims (6)

Terminal ( 1 ) for clamping an electrical conductor with - an insulating material housing ( 2 ), the at least one conductor insertion opening ( 13 ) connected to a spring force terminal connection ( 3 ), - at least one spring-force clamping connection ( 3 ) in the insulating housing ( 2 ), which consists of a busbar piece ( 4 ) and a clamping spring ( 5 ), - at least one actuating lever ( 10 ), which with at least one pivot bearing ( 11 ) pivotable in the insulating housing ( 2 ) is mounted and the one to open by the clamping spring ( 5 ) and the busbar piece ( 4 ) is formed, characterized in that - the pivot bearing ( 11 ) from a, a curved track shape exhibiting slot ( 20 ) in the insulating housing ( 2 ) and one in the slot ( 20 ) dipping long spigot ( 19 ) of the actuating lever ( 10 ), wherein the long pin ( 19 ) has a length greater than its width and the length of the spigot ( 19 ) greater than the corresponding width of the slot ( 20 ) in each pivotal position of the operating lever ( 10 ). Terminal ( 1 ) according to claim 1, characterized in that in each pivot position of the actuating lever ( 10 ) of the long pins ( 19 ) at at least two opposing support points in contact with a boundary wall of the slot ( 20 ) stands. Terminal ( 1 ) according to claim 1, characterized in that the pivoting movement of the actuating lever ( 10 ) consists of a superimposed rotational and translational movement. Terminal ( 1 ) according to claim 1 or 2, characterized in that the long pin ( 19 ) spans an oval surface, an elliptical surface or a rectangular surface closed with two circular sections at the opposite ends. Terminal ( 1 ) according to one of the preceding claims, characterized in that the pivot bearing ( 11 ) of the actuating lever ( 10 ) by two opposing slots ( 20 ) in the insulating housing ( 2 ), in each of which pointing away from each other on side surfaces of the actuating lever ( 10 ) excellent long cones ( 19 ), is formed. Terminal ( 1 ) according to one of the preceding claims, characterized in that at least one slot ( 20 ) in a boundary wall of the conductor insertion opening ( 13 ) is introduced, wherein the long pin ( 19 ) in the open position of the operating lever ( 10 ) with its long-spiked ( 19 ) supporting side wall ( 22 ) a continuation of the boundary wall of the conductor insertion opening ( 13 ) forms for guiding an electrical conductor to the nip.

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