DE102009031938B4 - Electrical connection element for connecting a conductor to a printed circuit board - Google Patents

Abstract

Electrical connection element (1) for connecting an electrical conductor (4) to an electrical assembly (55), with an insulating housing (7) with an insertion opening (6) for the conductor (4), a clamping body mounted rotatably in the insulating housing (7) ( 3), an adjusting means (5) which in a Verstellrichtung (8) is movable back and forth in a direction of adjustment (8) via a in the insulating housing (7) arranged Verstellgegenmittel in order to adjust the clamping body (3) in a clamping position (K) or in to release a plug-in position (E), a current-carrying contact part (2) for contacting the conductor (4) and a connecting part (2, 3) arranged thereon for contacting the assembly (55), and a resilient return element (22) for returning the reversibly movable Clamping body (3) in the insertion position (E), characterized in that the restoring element (22) simultaneously forms the current-carrying contact part (2), wherein the contact part restoring element (2, 22) zwis Chen the clamping body (3) and the conductor (4) is arranged.

Description

The present invention relates to an electrical connection element, in particular a front terminal, in which a conductor can be inserted and reversibly clamped by means of a clamping body, wherein the conductor contacts a contact part in a clamping position of the clamping body.

In such electrical connection elements of the conductor according to the prior art by means of a movable, the contact force generating clamp body is clamped to an immovable, the current-carrying busbar, wherein a screw is used to adjust the clamping body in its clamping position.

For example, the document shows EP 0 836 242 B1 a device for clamping an electrical conductor with a pivotally mounted pressure piece, which is designed in the manner of an elongate lever and with which the conductor is clamped. The device for clamping on the one hand has a busbar, which contacts the conductor in the clamped state. On the other hand, a spring is provided for the return of the pressure piece, wherein the bus bar and the spring are provided at opposite ends of the pressure piece. The disadvantage is that the spring shears in the clamping position, as for a corresponding space must be provided.

The DE 93 17 783 U1 discloses a clamping device in which a clamping body presses a conductor against a contact element and thereby fixed. The clamp body is pressed by a screw against the head. To facilitate the insertion of thin and easily deformable conductors, a separate return element acts on the clamping body. This can be designed as a separate component as part of the housing of the connection element or as part of the clamping body itself.

The FR 2 251 928 A1 also discloses an electrical connection element in which a clamping body is pressed by a screw against the conductor to fix it in the electrical connection element. Again, a return element is provided in the form of a separate spring, which acts on the clamping body.

The DE 43 28 928 A1 discloses a structurally differently configured, with respect to their function, however, similar arrangement in which a clamping body presses a conductor inserted into the connection element against the housing of the connection element to define the conductor, at the same time a separate spring acts as a restoring element on the clamping body.

The object of the invention is to develop a very space-saving electrical connection element that is very easy to install.

The object is achieved with an electrical connection element for connecting a plug-in in the electrical connection element conductor with an electrical assembly, with a clamp body and a return element, wherein the clamp body reversibly from a plug-in position in which the conductor is inserted into the electrical connection element in a Clamping position in which the conductor is jammed in the electrical connection element, is adjustable, wherein the return element is provided for the provision of the clamping body of the clamping position in the insertion position, and wherein the return element on the plug-in conductor facing side of the clamping body and on the clamping body is provided adjacent.

Since the restoring element is provided on the side of the clamping body facing the insertable conductor and adjacent thereto, the installation space conventionally required for a spring is saved on the side of the clamping body facing away from the conductor. Compared to conventional designs of such a spring terminal, the electrical connection element according to the invention therefore requires less space and is thus smaller to produce.

Furthermore, the electrical connection element comprises a contact part for electrically connecting the plug-in conductor with the electrical assembly. The contact part may be formed, for example, as a busbar.

The contact part is preferably provided for the frictional contact with the conductor. The frictional contact is made in particular in the clamping position, so that contacted in the clamping position of the conductor, the contact part electrically. The clamping body may be connected in the clamping position indirectly frictionally connected to the conductor, in which case between the conductor and the clamping body, for example, the contact part is arranged. Furthermore, in the clamping position, an indirect force-locking contact of the clamping body with the conductor may be made when one or more other components, in particular the restoring element, or the return element and the contact part, between the clamping body and the conductor are arranged.

The contact part and the return element are arranged in a preferred embodiment on the plug-in conductor facing side of the clamp body. In this case, the contact part both be at least partially disposed on the side facing the clamp body of the conductor as well as at least partially on the side remote from the clamp body of the conductor, and / or the contact part is at least partially disposed around the conductor, and therefore can both on the clamp body facing as well be arranged on the side facing away from the clamp body of the conductor and / or in between.

According to the invention, the restoring element forms a contact part for connecting the insertable conductor to the electrical assembly. In this case, restoring element and contact part are in particular made in one piece.

The combination of restoring element and contact part or the one-piece production into a single component has the advantage that the storage and installation of a single component compared to two components is cheaper and easier possible.

Preferably, the restoring element is at least partially designed as a spring, in particular as a leaf spring, and is at least partially frictionally against the clamping body. When adjusting the clamp body, the restoring element is adjusted, and preferably tensioned when adjusting due to its spring properties or relaxed when resetting. Then, the return element takes over the provision of the clamping body of the clamping position in the insertion automatically.

The clamping body is preferably formed of a non-conductive material, for example of a plastic or ceramic.

On the other hand, the contact part preferably has good electrical conductivity and current carrying capacity and is therefore made of an electrical conductor, in particular a metal or a metal alloy, for example of copper or a copper alloy.

Since the restoring element is at least partially designed as a spring, it preferably has good spring properties and is preferably also metallic.

Since the return element according to the invention forms the contact part, the restoring element has both good electrical conductivity and current carrying capacity and good spring properties and is preferably also formed from a metal or a metal alloy.

The clamping body is preferably mounted rotatably and / or translationally in electrical connection element. The storage takes place for example by means of a pin, an axle, a bearing shell located in the ground or scenery or similar.

Also preferably, the clamping body is designed in the manner of a lever, so that by means of a rotation by a small angle already sufficient clamping force for clamping the conductor can be achieved at the contact part.

The electrical connection element according to the invention comprises an adjusting means for adjusting the clamping body, being adjusted by adjusting the adjusting in an adjustment of the clamping body of the insertion position in the clamping position, and wherein by adjusting the adjusting against the adjustment of the provision of the clamping body of the clamping position in the insertion position is released.

By adjusting the adjusting means in the adjustment of the clamping body is further preferably in a direction facing the contact part adjustable. As a result, the clamp body can be pressed against the contact part and / or the restoring element and against the conductor. In this case, the conductor is pressed against the contact part until it is jammed in the clamping position in the electrical connection element. Since when adjusting the clamping body and the restoring element is adjusted, this is preferably biased due to its spring properties and acts on the clamping body with a restoring force. However, the clamping body is held by the adjusting means in its position, in particular in the clamping position.

Due to the restoring force preferably exerted by the contact part on the clamping body is reset during adjustment of the adjusting against the adjustment of the clamping body in its insertion position, wherein the contact part relaxes.

The adjusting means is preferably a screw, wherein the screw in the spring clamp in or against the adjustment direction is adjustable. The adjustment of the adjustment is therefore very easy by means of a screwdriver.

In the embodiment according to the invention, the electrical connecting element has an adjusting counter-means, in particular an insert nut, which cooperates with the adjusting means.

In this embodiment, a screw used as adjusting means is also optimally guided in the adjustment direction, screwed-in state. Therefore, a secure transmission of the required torque and the required longitudinal forces despite very small dimensions and consequently very small sheet thicknesses possible. The insert nut may be fixed by riveting, welding, folded tabs of the electrical connection element or the like in the electrical connection element.

Further preferably, the electrical connection element comprises an insulating housing, which has a side length which is less than or equal to 15 mm. The insulating housing is preferably folded, cleared, metal injection molded, metal powder sintered or similar. In a particularly preferred embodiment, the side length of the electrical connection element is essentially determined by a wire end sleeve of the conductor and by using a screw as adjusting means by a width of a screwdriver head, with which the screw is adjustable.

In a preferred embodiment, the contact part and / or the restoring element extend at least partially parallel to the adjustment direction. Likewise preferably, the contact part has a connection part, for example a plug, in order to connect the conductor to an electrical component or an electrical assembly, in particular a circuit board.

Furthermore, the electrical connection element comprises an insertion opening, through which the conductor can be inserted into it. Particularly preferably, the conductor can be inserted parallel to the adjustment direction through the insertion opening. In this embodiment, both the conductor and the adjusting means are parallel to the adjustment direction operable, so that the mounting of the conductor is very easy.

The electrical connection element is preferably a front terminal. In a further preferred embodiment, a plurality of electrical connection elements are provided adjacent to one another.

In the following the invention will be described with reference to figures. The figures are merely exemplary and do not limit the general idea of the invention.

1 shows a detail of an embodiment of an electrical connection element with inserted and clamped conductor according to the prior art,

2 shows in (a) a section of the electronic connection element of 1 in a perspective view, and in (b) the contact part and in (c) the return element of the electrical connection element,

3 shows the electrical connection element of 1 and 2 with inserted conductor in a perspective view with closed insulating housing,

4 shows sections of an embodiment of an electrical connection element according to the invention in (a) with inserted conductor in a side view and in (b) in a perspective view without a conductor.

1 shows a section of an embodiment of an electrical connection element 1 according to the prior art with inserted and clamped conductor 4 , The spring clamp 1 has a contact part 2 , a reset element 22 and a clamp body 3 on. The contact part 2 is for contact with a in electrical connection element 1 plug-in ladder 4 provided energized. The clamp body 3 is reversible from an insertion position E (see 2 ), in which the leader 4 in electrical connection element 1 can be inserted, in a clamping position K shown here, in which the conductor 4 non-positively with the contact part 2 is connected and this contacted, adjustable. The reset element is for the return of the clamp body 3 provided from the clamping position K in the insertion position E.

The contact part 2 is on the ladder 4 facing side of the clamp body 3 arranged. The electrical connection element 1 has an insulating housing, on which the contact part 2 in the embodiment shown here at least partially applied. In the clamping position K presses the clamp body 3 the leader 4 to the contact part 2 , The reset element 22 lies at least partially on the clamp body 3 non-positively and is in free space between the clamp body 3 and the leader 4 arranged.

The clamp body 3 is by means of an adjusting 5 , here a screw, in an adjustment direction, here by an arrow 8th is indicated, disguised. In the present case, the clamping body 3 executed in the manner of a lever and about an axis 10 (S. 2 ) pivotally mounted so that a rotational adjustment of the clamping body 3 is provided. Alternatively or additionally, however, is also a translational adjustment of the clamp body 3 possible.

The adjusting means 5 acts when adjusting with an adjustment antidote 9 together, in particular a threaded body and here an insert nut. It is when adjusting in the adjustment 8th translationally adjusted.

When adjusting the adjustment 5 in the adjustment 8th acts the adjustment 5 with the clamp body 3 together and adjust this, so that he is here by adjusting the adjustment 5 around the axis 10 is pivoted. When swiveling around the axis 10 This is also the force-fit with the clamp body 3 connected reset element 22 adjusted. This has spring properties, so that it is stretched due to its spring action.

The clamp body 3 can starting from the insertion position E by adjusting the adjustment 5 in the adjustment 8th be adjusted until the conductor 4 in the electrical connection element 1 while contacting the contact part 2 is clamped and the clamping body 3 located in the clamping position K. In the embodiment shown here then becomes the conductor 4 at the clamp body 3 opposite side of the conductor 4 against the contact part 2 pressed and is at the head 4 facing side of the clamp body 3 directly positively connected with this. For the return element 22 the free space is below the non-positive connection of the clamp body 3 with the conductor 4 used, so that no additional space for the return element 22 must be provided.

To release the conductor 4 from the electrical connection element 1 becomes the adjusting means 5 against the adjustment 8th adjusted. As the clamp body 3 from the cocked, non-positively on the clamp body 3 adjacent reset element 22 is acted upon by a restoring force, the clamping body 3 while the contact part 2 pushed back in the direction of the insertion position E. In this case, the reset element 22 relaxed.

In the embodiment shown here are the return element 22 and the contact part 2 electrically conductive, in particular by a rivet or screw, connected together. If the leader 4 the contact part 2 contacted electrically conductive, in particular in the clamping position K, are therefore return element 22 and contact part 2 at the same electrical potential.

2 shows in (a) a section of the electrical connection element 1 of the 1 in a perspective view, and in (b) the contact part 2 and in (c) the return element 22 the spring clamp 1 , The clamp body 3 is here in the insertion position E. The electrical connection element 1 has an insertion opening 6 on, through which a ladder 4 in the electrical connection element 1 is pluggable.

The contact part 2 as well as the return element 22 are in this embodiment, two parts executed and separately manufactured parts. But it is also a one-piece embodiment of the contact part 2 and the return element 22 conceivable with a substantially same shape. The contact part 2 is on the clamp body 3 opposite side of a male conductor 4 at least partially on the insulating housing 7 arranged adjacent. The reset element 22 is on the clamp body 3 facing side of the conductor 4 at least partially in the space between the einzusteckenden head 4 and the clamp body 3 arranged and lies at least partially on the clamp body 3 at. The at the clamp body 3 adjacent part of the return element 22 is from the contact part 2 spaced apart and extends substantially parallel to the adjustment direction 8th ,

contact part 2 and reset element 22 Here are positively and / or positively and / or materially connected to each other.

The contact part 2 also extends substantially parallel to the adjustment 8th , It has an angled tongue 2.2 on, the leadership of the leader 4 in the electrical connection element 1 facilitated. Furthermore, at the contact part 2 a connecting part 2.3 , here a plug for connecting electrical connection element 1 as well as the leader 4 with an electrical component or an electrical assembly, in particular a circuit board provided.

3 shows the electrical connection element 1 of the 1 and 2 with plugged in conductor 4 in a perspective view with a closed insulating housing 7 , Shown are the adjusting means 5 as well as the anti-adjustment agent 9 Here is a screw and an insert nut. As can be seen from this figure, the required side lengths a, b of the electrical connection element 1 essentially by the diameter of the conductor 4 and the width of the adjusting means for adjusting 5 required screwdriver head determined.

4 shows sections of an electrical connection element according to the invention 1 in (a) with plugged in conductor 4 in the clamping position K of the clamp body 3 in a side view, and in (b) in a perspective view without a ladder 4 in the insertion position E of the clamp body 3 ,

Also in this embodiment is by adjusting the adjustment 5 in the adjustment 8th the clamp body 3 from the insertion position E, starting from an axis 10 pivoted. This will be a reset element 22 which is positively connected to the clamp body 3 abuts, braced and also against a in the electrical connection element 1 plugged in conductor 4 pressed. Starting from this clamping position K, the conductor 4 be solved by the adjusting means 5 against the adjustment 8th is adjusted, wherein the clamping body 3 by the return element 22 Resting force exerted on it is pivoted back into the insertion position E.

In contrast to the embodiment of 1 but forms in the embodiment of the electrical connection element shown here 1 the reset element 22 at the same time the contact part 2 , The reset element 22 is made in one piece, and it extends substantially parallel to the adjustment 8th in the space between the clamp body 3 and the leader 4 , In the clamping position K is the contact part 2 at least partially between the clamp body 3 and the leader 4 arranged and the clamp body 3 pushes the contact part 2 against the leader 4 , so that it frictionally both on the clamp body 3 as well as at the ladder 4 is present and the conductor 4 electrically contacted. In this embodiment, the reset element takes over 22 hence the power supply. It therefore has analogous to the contact part 2 of the 1 a connecting part 2.3 on, here also a plug, with the electrical connection of the electrical connection element 1 with an electrical assembly 55 can be produced.

The connection element according to the invention 1 requires very little space and is very easy and inexpensive to install due to the low number of components.

LIST OF REFERENCE NUMBERS

1

Electrical connection element

2

contact part

2.1

Bus bar portion

2.2

tongue

2.3

Connecting part, plug

3

clamping bodies

4

ladder

5

Adjusting means, screw

6

insertion

7

insulating

8th

adjustment

9

Anti-adjustment agent, starter

10

axis

22

Return element

55

Electrical assembly

e

insertion position

K

clamping position

Claims (5)

Electrical connection element ( 1 ) for connecting an electrical conductor ( 4 ) with an electrical assembly ( 55 ), with an insulating housing ( 7 ) with an insertion opening ( 6 ) for the leader ( 4 ), a rotary in the insulating housing ( 7 ) mounted clamping body ( 3 ), an adjusting means ( 5 ), which via a in the insulating housing ( 7 ) arranged anti-adjustment agent ( 9 ) in an adjustment direction ( 8th ) is movable back and forth to the clamping body ( 3 ) in a clamping position (K) or to release in an insertion position (E), a current-carrying contact part ( 2 ) for contacting the conductor ( 4 ) and a connecting part ( 2 . 3 ) for contacting the assembly ( 55 ), and a resilient return element ( 22 ) for resetting the reversibly movable clamping body ( 3 ) in the insertion position (E), characterized in that the return element ( 22 ) at the same time the current-carrying contact part ( 2 ), wherein the contact part return element ( 2 . 22 ) between the clamping body ( 3 ) and the leader ( 4 ) is arranged. Electrical connection element ( 1 ) according to one of the preceding claims, characterized in that the clamping body ( 3 ) rotationally and / or translationally in the spring clip ( 1 ) is stored. Electrical connection element ( 1 ) according to one of the preceding claims, characterized in that the adjusting means ( 5 ) is a screw. Electrical connection element ( 1 ) according to one of the preceding claims, characterized in that the adjustment countermeasure ( 9 ) is an infeed mother. Electrical connection element ( 1 ) according to one of the preceding claims, characterized in that the insulating housing ( 7 ) has a side length (a, b) which is less than or equal to 15 mm.

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