DE202010016471U1 - Automatic electrical terminal and electrical equipment with such a terminal - Google Patents

Abstract

Electrical connection terminal (200) with:
- A clamping spring (210) in the form of a loop-forming metal plate having a first end leg (220) which passes through an opening (231) of a second end leg (230), said opening (231) comprises an anchoring edge (232) on the stripped wire core (950) of an electrical conductor (900) introduced via this opening (231) can rest,
- A metal contact plate (250) which passes through this opening (231) and whose one contact side (251) is directed to the anchoring edge (232) to also rest on the stripped wire core (950) of the electrical conductor (900),
characterized in that said contact pad (250) has two bulges (260) curved in the direction of the anchoring edge (232) of the opening (231) extending along the insertion direction (D1) of the stripped wire core (950) of the electrical conductor (900) this opening (231) are located on both sides of this opening (231).

Description

TECHNICAL FIELD OF THE INVENTION

The present invention relates generally to automatic electrical terminals.

In particular, it relates to an electrical terminal which comprises, on the one hand, a clamping spring in the form of a metal plate forming a loop with a first end leg passing through an opening of a second end leg, this opening comprising an anchoring edge resting on a stripped wire core a metal contact plate which passes through this opening and whose one contact side is directed to the anchoring edge, to also rest on the stripped wire core of this electrical conductor.

It also relates to an electrical appliance comprising at least one such electrical terminal.

This invention finds particular advantage in the realization of an electrical connector with automatic connection, such as a socket, an extension or an electrical plug an advantageous application.

TECHNICAL BACKGROUND

An electrical equipment with a plurality of electrical terminals of the type mentioned is already known. In such a device, each clamping spring is biased such that its first end leg automatically exerts a permanent pressure on the stripped wire core of the inserted over the opening of its second end leg electrical conductor to press this stripped wire core on the metal contact plate.

In order to prevent tearing out of the electrical conductor from the electrical terminal, if a tensile force is applied to it accidentally, the metal contact plate has a recess which forms on its contact side a projecting web, which is aligned in the opposite direction to the insertion of the electrical conductor. Thus, the web on the stripped end of the electrical conductor provides a resistance when a tensile force is applied to the electrical conductor, which prevents the tearing out of the electrical conductor from the electrical terminal. This projecting web also forms a contact edge, which improves the electrical connection between the metal contact plate and the stripped end of the electrical conductor.

From the patent application DE 203 13 855 Incidentally, such an electrical terminal is known, but instead of the projecting web has a bulge, which is arched to the Verkankerungsrand the opening and between the metal contact plate and the stripped wire core of the electrical conductor ensures good electrical contact.

SCOPE OF THE INVENTION

With respect to the prior art, the present invention proposes an electrical connection terminal in which the metal contact plate has two bulges bulging in the direction of the anchoring edge of the opening, which are located in the insertion direction of the stripped wire core of the electrical conductor through this opening on both sides of this anchoring edge ,

Thanks to these two bulges, the contact area between the stripped wire conductor of the electrical conductor and the metal contact plate is maximum, which benefits the quality of the electrical contact between these two elements. Combined with the anchoring edge of the clamping spring, these two bulges also allow the stripped wire core of the electrical conductor to dictate a double chicane shape by which the electrical conductor is effectively secured against being torn out.

• – Jede Ausbauchung weist ein durchgehendes Längsprofil auf und hat keine Kanten,
• – jede Ausbauchung weist höchstens eine Höhe auf, die der Stärke des Kontaktplättchens entspricht,
• – die beiden Ausbauchungen weisen in jedem Fall Breiten auf, die kleiner sind als die Breite des Kontaktplättchens und befinden sich zu den Längsrändern dieses Kontaktplättchens in einem Abstand,
• – die beiden Ausbauchungen weisen identische Formen auf und befinden sich im gleichen Abstand zur Öffnung,
• – der zweite Endschenkel der Klemmfeder weist im Bereich seiner Öffnung eine derartige Steigungsunterbrechung auf, dass sie einen Verankerungsabschnitt mit dem Verankerungsrand umfasst, und welche in Bezug zum Rest des zweiten Endschenkels so geneigt ist, dass der Verankerungsrand in entgegengesetzter Richtung zur Einführrichtung der abisolierten Drahtader des elektrischen Leiters durch die Öffnung des zweiten Endschenkels der Klemmfeder orientiert ist,
• – der zwischen dem Verankerungsabschnitt und dem Rest des zweiten Endschenkels der Klemmfeder gebildete Neigungswinkel beträgt zwischen 10 und 30 Grad und liegt vorzugsweise bei 15 Grad,
• – die durch die Klemmfeder gebildete Schlaufe erstreckt sich ab dem ersten Endschenkel in Richtung des zweiten Endschenkels in einer zur Einführrichtung entgegengesetzten Richtung,
• – der erste Endschenkel der Klemmfeder ist flach,
• – die Klemmfeder umfasst einen Verbindungsabschnitt, der den ersten und den zweiten Endschenkel miteinander verbindet und der einen Betätigungsabschnitt umfasst, der sich im Wesentlichen gegenüber dem ersten Endschenkel erstreckt, wobei dieser Betätigungsabschnitt ab diesem zweiten Endschenkel eine Verstärkung mit einer anschließenden Mulde umfasst,
• – das Kontaktplättchen weist ein erstes Ende mit diesen Ausbauchungen auf, sowie ein zweites, entgegengesetztes und gefaltetes Ende, um für einen Anschlussstift einen Aufnahmeraum zu bilden bzw. ein Befestigungsmittel für ein Ende eines Anschlussstifts, und
• – das Kontaktplättchen und die Klemmfeder sind jeweils durch Zuschneiden und Falten eines Metallbands aus einem Stück gefertigt.

Further advantageous and non-limiting features of the terminal according to the invention are as follows:

• - Each bulge has a continuous longitudinal profile and has no edges,
• Each bulge has at most a height corresponding to the thickness of the contact plate,
• The two bulges in each case have widths which are smaller than the width of the contact plate and are at a distance to the longitudinal edges of this contact plate,
• The two bulges have identical shapes and are equidistant from the opening,
• - The second end leg of the clamping spring has such a pitch interruption in the region of its opening that it comprises an anchoring portion with the anchoring edge, and which is inclined relative to the rest of the second end leg so that the anchoring edge in the opposite direction to the insertion direction of the stripped wire core of electrical conductor is oriented through the opening of the second end leg of the clamping spring,
• The angle of inclination formed between the anchoring portion and the remainder of the second end leg of the clamping spring is between 10 and 30 degrees and is preferably 15 degrees,
• The loop formed by the clamping spring extends from the first end leg in the direction of the second end leg in a direction opposite to the insertion direction,
• The first end leg of the clamping spring is flat,
• - The clamping spring comprises a connecting portion which connects the first and the second end leg and which comprises an actuating portion which extends substantially opposite the first end leg, said actuating portion comprises a reinforcement with a subsequent trough from this second end leg,
• - The contact pad has a first end with these bulges, and a second, opposite and folded end to form for a connection pin a receiving space or an attachment means for one end of a terminal pin, and
• - The contact plate and the clamping spring are each made by cutting and folding a metal strip in one piece.

The invention also relates to an electrical device with an insulating housing which accommodates at least one electrical terminal as described above and which defines for each electrical terminal a line which on the one hand outside the housing and on the other hand within the insulating housing in the axis of the two bulges of the contact plate this electrical terminal opens.

Advantageously, an actuating lever for the clamping spring is provided for each electrical terminal, which is mounted between a stable rest position and an activated position pivotally mounted on the insulating housing, the actuating lever in the activated position so on the second end leg of the clamping spring presses that the anchoring edge of the Opening is brought in distance to the contact plate.

Preferably, the actuating lever comprises a body with a bulge, which may come to rest on the reinforcement of the actuating portion of the connecting portion of this clamping spring.

DETAILED DESCRIPTION OF AN EMBODIMENT

The following description will be better understood by reference to the accompanying drawings, which are to be understood only as non-limiting examples of what the invention is and how it can be implemented.

Show it:

The is a perspective view of a base of an electrical device housing with three electrical terminals according to the invention;

The is a front view of the socket of the electrical device ;

The is a section taken along the plane AA ;

The is a perspective view of one of the terminals for phase or neutral of the electrical device ;

The is a section taken along the plane BB ;

The is a detail view of the area VI of the ;

The is a section through the insulating housing of the electrical device , and an electrical conductor, the stripped wire core is clamped in one of the electrical terminals of this electrical device;

The and are perspective views of the ground terminal of the electrical device at two different angles; and

The and are functional diagrams of the electrical device off ,

In the pictures becomes an electrical device 1 shown, here an electrical connector, which is an insulating housing 100 includes, in the three automatic electrical terminals 200 (a terminal for the phase conductor, a terminal for the neutral conductor and a terminal for grounding) are housed and the three operating lever 300 having.

The insulating housing 100 includes, as in the to particularly clearly visible, a generally cylindrical base 120 on the front through a front wall 121 closed and partially hollow inside to define three different receiving recesses facing the back of the base 120 are open to three electrical terminals 200 take.

The insulating housing 100 also includes, as in the It is particularly clear, a lid 130 , the back of the socket 120 completes and the three insertion channels 110 for electrical conductors 900 includes and access to the three electrical terminals 200 allows.

Every channel 110 extends along an axis A1, which is an insertion direction D1 of the electrical conductors 900 into the corresponding electrical connection terminal 200 Are defined. Every channel 110 leads over a broadening estuary 111 at the back of the lid 130 to the outside of the insulating housing 100 ,

Each electrical connection terminal 200 includes a clamping spring 210 on a metal contact plate 250 threaded directly to a receiving chamber 259 of a connection pin (for the ground terminal see and ) or on a pin 290 (for the phase conductor and neutral terminals see and ) connected.

Like in the to to see, lies each clamp spring 210 in the form of a loop-shaped metal plate with a first end leg 220 in front of an opening 231 a second end leg 230 traverses, with this first and second end legs 220 . 230 via a connecting section 240 connected to each other.

Each spring clamp 210 is over the opening 231 her second end leg 230 so on the contact plate 250 threaded that their first thigh 220 along this contact plate 250 extends while resting on a back of this tile.

The connecting section 240 each clamping spring 210 is so biased that an anchoring edge 232 the opening 231 automatically against a contact page 251 designated front side of the contact plate 250 is pressed.

It will be like that better shows the contact plate 250 each electrical connection terminal 200 between the first end leg 220 the clamping spring 210 and the anchoring edge 232 the opening 231 of the second end leg 230 the clamping spring 210 sandwiched when not connected.

The contact plate 250 has in particular two ends, of which a first rectangular end 252 intended to be between the first end leg 220 and the anchoring edge 232 the opening 231 of the second end leg 230 the clamping spring 210 sandwiched, and a second, opposite end 253 ; 254 ,

According to a particularly advantageous feature of the invention comprises, as it is especially in the to good to see, the first end 252 of the contact plate 250 each electrical connection terminal 200 two identical bulges 260 , the direction anchorage edge 232 the opening 231 of the second end leg 230 the clamping spring 210 are arched and on both sides of this opening 231 lie.

These two bulges 260 So are located along the longitudinal axis of the first rectangular end 252 of the contact plate 250 spaced apart.

They each have two parallel longitudinal edges, in the first end 252 of the contact plate 250 cut in parallel and from the longitudinal edges of this first end 252 of the contact plate 250 are spaced.

They are formed by deep drawing, each having a rounded and continuous longitudinal profile whose ends are tangent to the remainder of the first end 252 of the contact plate 250 connect.

Every bulge 260 here has a height h, which is less than or equal to the thickness e of the contact plate 250 (please refer ) and a width l, which in any case is smaller than the width L of the contact plate 250 (please refer ).

These two bulges 260 are so on the first end 252 of the contact plate 250 arranged so that they, when they are not connected, at the same distance from the anchoring edge 232 the opening 231 of the second end leg 230 the clamping spring 210 are.

Through these two bulges 260 can along with the anchoring edge 232 the opening 231 on the way of the electrical conductor 900 ( ) a double chicane are formed, which stops the electrical conductor 900 in the electrical connection terminal 200 strengthens and the quality of the electrical contact between the contact plate 250 and the stripped wire core 950 in the electrical connection terminal 200 introduced electrical conductor 900 improved.

The contact plates 250 the three electrical terminals 200 are just like the clamping springs 210 each made from one piece, which is cut from a metal strip and then folded.

The second ends 253 the contact plate 250 the terminals for phase and neutral of the electrical connector 1 are like that and show well, folded in the form of an L and each have a central opening 258 on, facing an opening in the front wall 121 of the pedestal 120 located and in the end of a corresponding pin 290 is welded or crimped so that this from the front wall 212 of the pedestal 120 can stand out.

The second end 254 of the contact plate 250 the ground terminal of the electrical connector 1 is how it is and show well, folded to fit in one piece the receiving chamber 259 for the ground pin of an electrical connector (not shown) to form. This includes the end in relation to the first end 252 of the contact plate 250 a central, L-shaped folded area 256 , and two bars 255 extending from the margins of this central area 256 extend and are collapsed to each other so that they form two hairpins, the receiving chamber between them 259 delimit. These hairpin shapes include the bars 255 one angle each 257 , which forms a pivoting hinge and serves as a clamping jaw of a clip to the opening via an opening in the front wall 121 of the pedestal 120 in the chamber 259 clamp inserted grounding pin.

How it in particular the shows, defines the lid here 130 of the insulating housing 100 of the electrical connector 1 in the interior three recesses 131 for the clamping springs 210 the three electrical terminals 200 incidentally on a rear portion of the base 120 rest. The lid 130 also takes the part of the contact plate 250 each electrical connection terminal 200 on, the opening 232 of the second end leg 230 the clamping spring 210 traverses, with this contact plate 250 by the way, also from the inner partitions of the base 120 is held.

Advantageously, extending from the clamping spring 210 each electrical connection terminal 200 formed loop in the corresponding recess of the lid 130 , near the mouth 111 the input channel of the terminal. This loop extends from the first end leg 220 to the second end leg 230 and follows one to the insertion direction D1 of the electrical conductor 900 in the opposite direction.

This winding direction of the loop can do this for every electrical connection terminal 200 in the interior of the insulating housing 100 required volume can be significantly reduced and thus the total volume of this insulating housing, the mechanical effect of the clamping springs 210 each connection can be saved.

The first end leg 220 each clamping spring 210 is flat and extends in particular parallel to the axis A1 of the channel 110 while the second end leg 230 each clamping spring 210 extends along an axis perpendicular to the axis A1 axis in a region which is within the lid 130 opposite and from the estuary 111 of the access channel 110 is spaced.

Preferably, the second end leg 230 the clamping spring 210 in the area of its opening 231 Such a slope break or such a bend 233 (please refer ) on that he has an anchoring section 234 with the said anchoring edge 232 the opening 231 that is relative to the remainder of the second end leg 230 is inclined to this anchoring edge 232 along a direction D2 (see ), to the insertion direction D1 of the electrical conductor 900 through this opening 231 is opposite.

The between the anchoring section 234 and the remainder of the second end leg 230 formed inclination angle B1 is how it looks shows, between 10 and 30 degrees and is preferably 15 degrees.

The prestressed clamping spring 210 each electrical connection terminal 200 acts, as it in particular the automatically shows a permanent pressure on the stripped wire core 950 through the opening 231 of the second end leg 230 over the access channel 110 of the lid 130 introduced electrical conductor 900 out to the wire core on the contact side 251 the conducting and the receiving chamber 259 a ground pin or the pin of a phase or neutral conductor 290 connected contact plate 250 to press.

Due to the winding and folding direction of the previously mentioned in the lid 130 of the insulating housing 100 of the electrical connector 1 arranged clamping spring 210 can the anchoring edge 232 the opening 231 of the second end leg 230 the clamping spring 210 be oriented so that it defines a pointed edge, which is oriented so that they are in the electrical conductor 900 anchored when a tensile force is applied to it, thus preventing it from being accidentally removed from the electrical terminal 200 is torn out.

Advantageously, the bend is suitable 233 of the second end leg 230 the clamping spring 210 on how it is . and show, against the inner surface of a part of the lid 130 to slide when the clamping spring 210 is actuated, so that the substantially perpendicular to the axis A1 of the access channel 110 oriented second end legs 230 is held. In this way, the axis A1 covers this channel 110 with the axis of the opening 231 of the second end leg 230 the clamping spring 210 when the clamping spring 210 is pressed so that its opening 231 opposite the estuary 111 of the canal 110 located to the electrical conductor 900 take. This can be during insertion of the electrical conductor 900 into the electrical connection terminal 200 be avoided that this against a part of the clamping spring 210 anstoßt.

The connecting section 240 each clamping spring 210 includes, like the and show an operating section 241 which starts from the second end leg 230 substantially opposite the first end leg 220 extends. This operating section 241 includes starting from this second end leg 230 a thickening 242 with a subsequent trough 243 ,

This operating section 241 is how it is shows, from the outside of the insulating housing 100 about one in the lid 130 integrated opening 135 accessible.

Every operating lever 300 So includes a part of this opening 135 in the lid 130 incorporated body 301 , which pivots on the pedestal 120 of the insulating housing 100 of the electrical connector 1 is mounted. Every operating lever 300 includes, opposite to its in the lid 130 sitting end, a gripping section 303 outside the lid 130 which is accessible to the user.

The body 301 each operating lever 303 is between a stable rest position ( ) and an unstable activated position ( ) pivoting on the pedestal 120 mounted, wherein the activated position is reached when the user a force on the gripping portion 303 of the lever 300 exercises.

In the resting position is the body 301 of the lever 300 not necessarily with the thickening 242 of the operating section 241 the prestressed clamping spring 210 in contact so he does not claim them. The anchoring edge 232 the opening 231 of the second end leg 230 the clamping spring 210 then either strained against the contact plate 250 or against the stripped wire core 950 an electrical conductor 900 held when such an electrical conductor in the electrical terminal 200 is introduced.

In the activated position, the body pushes 301 of the operating lever 300 against the second end leg 230 the clamping spring 210 to the anchoring edge 232 his mouth 231 from the contact plate 250 to remove. The body 301 each operating lever 300 includes a bulge 302 that are on the thickening 242 of the operating section 241 the prestressed clamping spring 210 can support.

Once the user then the on the inclined operating lever 300 applied pressure loosens, exercises the clamping spring 210 on the operating lever 300 a back pressure to bring him back to its straight starting position.

The present invention is by no means limited to the described and illustrated embodiments. The person skilled in the art can readily implement all variants which are within the meaning of the invention.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 20313855 [0007]

Claims (15)

Electrical connection terminal ( 200 ) with: - a clamping spring ( 210 ) in the form of a loop forming metal plate with a first end leg ( 220 ), which has an opening ( 231 ) of a second end leg ( 230 ), this opening ( 231 ) an anchoring edge ( 232 ), which on the stripped wire core ( 950 ) one over this opening ( 231 ) introduced electrical conductor ( 900 ), - a metal contact plate ( 250 ) that this opening ( 231 ) and a contact page ( 251 ) to the anchoring edge ( 232 ) is directed to also on the stripped wire core ( 950 ) of the electrical conductor ( 900 ), characterized in that this contact plate ( 250 ) two in the direction of the anchoring edge ( 232 ) of the opening ( 231 ) arched bulges ( 260 ), which along the insertion direction (D1) of the stripped wire core ( 950 ) of the electrical conductor ( 900 ) through this opening ( 231 ) on both sides of this opening ( 231 ) are located. Electrical connection terminal ( 200 ) according to claim 1, wherein each bulge ( 260 ) has a continuous and edge-free longitudinal profile. Electrical connection terminal ( 200 ) according to one of claims 1 and 2, in which each bulge ( 260 ) has a height (h) which is less than or equal to the thickness (e) of the contact chip ( 250 ). Electrical connection terminal ( 200 ) according to one of claims 1 to 3, in which the two bulges ( 260 ) Have widths (l) which in any case are smaller than the width (L) of the contact plate ( 250 ) and from the longitudinal edges of this contact plate ( 250 ) are spaced. Electrical connection terminal ( 200 ) according to one of claims 1 to 4, in which the two bulges ( 260 ) have identical shapes and at the same distance from the opening ( 231 ) are located. Electrical connection terminal ( 200 ) according to one of claims 1 to 5, in which the second end leg ( 230 ) of the clamping spring ( 210 ) in the region of its opening ( 231 ) such a steep decline ( 233 ) has an anchoring section ( 234 ) with an anchoring edge ( 232 ) and in relation to the remainder of the second end leg ( 230 ) is inclined to the anchoring edge ( 232 ) along one of the insertion direction (D1) of the stripped wire core ( 950 ) of the electrical conductor ( 90 ) through the opening ( 231 ) of the second end leg ( 230 ) of the clamping spring ( 210 ) in the opposite direction (D2). Electrical connection terminal ( 200 ) according to claim 6, wherein the angle of inclination (B1) between the anchoring portion (B1) 234 ) and the remainder of the second end leg ( 230 ) of the clamping spring ( 210 ) is between 10 and 30 degrees and preferably 15 degrees. Electrical connection terminal ( 200 ) according to one of claims 6 and 7, in which the clamping spring ( 210 ) formed loop from the first end leg ( 220 ) in the direction of the second end leg ( 230 ) extends in a direction opposite to the insertion direction (D1). Electrical connection terminal ( 200 ) according to one of Claims 1 to 8, in which the first end limb ( 220 ) of the clamping spring ( 210 ) is flat. Electrical connection terminal ( 200 ) according to one of claims 1 to 9, in which the clamping spring ( 210 ) a connecting section ( 240 ) comprising the first and second end legs ( 220 . 230 ) and an operating section ( 241 ), which is substantially opposite to the first end leg ( 220 ), this operating portion ( 241 ) starting from the second end leg ( 230 ) a thickening ( 242 ) with a subsequent trough ( 243 ). Electrical connection terminal ( 200 ) according to one of claims 1 to 10, in which the contact plate ( 250 ) a first end ( 252 ) with the bulges ( 260 ) and an opposite end ( 253 ; 254 ) which is folded to form a receiving chamber ( 259 ) for a terminal pin or a fastening means ( 258 ) for one end of a terminal pin ( 290 ) to build. Electrical connection terminal ( 200 ) according to one of claims 1 to 11, in which the contact plate ( 250 ) and the clamping spring ( 210 ) are made in one piece by cutting and folding a metal strip. Electrical equipment ( 1 ) with an insulating housing ( 100 ), characterized in that the insulating housing ( 100 ) at least one electrical connection terminal ( 200 ) according to one of claims 1 to 12 and for each electrical terminal ( 200 ) a channel ( 110 ), on the one hand on the outside and on the other side on the inside of the insulating housing ( 100 ) in the axis of the two bulges ( 260 ) of the contact plate ( 250 ) of this terminal ( 200 ) opens. Electrical equipment ( 1 ) according to claim 13, wherein for each electrical connection terminal ( 200 ) an operating lever ( 300 ) for the clamping spring ( 210 ) which is pivotable between a stable rest position and an activated position on the insulating housing ( 100 ) is mounted, wherein the actuating lever ( 300 ) the second end leg ( 230 ) of the clamping spring ( 210 ) so that the anchoring edge ( 232 ) of the opening ( 231 ) at a distance to the contact plate ( 250 ) is brought. Electrical appliance according to claim 14 with an electrical connection terminal ( 200 ) according to claim 10, wherein the actuating lever ( 300 ) a body ( 301 ) with a bulge ( 302 ), which is suitable for thickening ( 242 ) of the operating section ( 241 ) of the connection area ( 240 ) of the clamping spring ( 210 ).

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