WO2022096492A1

WO2022096492A1 - Direct plug-in compression spring connection

Info

Publication number: WO2022096492A1
Application number: PCT/EP2021/080483
Authority: WO
Inventors: Roman Henze; Andreas Rutz; Usman SHAHID; Uwe Arlitt
Original assignee: Weidmüller Interface GmbH & Co. KG
Priority date: 2020-11-06
Filing date: 2021-11-03
Publication date: 2022-05-12
Also published as: DE102020129342A1

Abstract

The invention relates to a direct plug-in compression spring connection (1) for connecting a conductor end (5), in particular in order to connect a stranded conductor end, comprising the following: a. a clamping cage (2) with a busbar (21) and a clamping spring (3) for contacting the electric conductor end (5) inserted into the direct plug-in compression spring connection (1) and into a conductor insertion region (L) of the clamping cage, wherein b. the clamping cage (2) has at least one wall - a base wall (20, 20') - which extends parallel to a pivoting direction (61) of the clamping spring (3), c. the clamping cage (2) additionally has at least one or more lateral walls (211, 212) such that an L-shaped, U-shaped, or rectangular cross-section is produced for the clamping cage (2) perpendicularly to the plug-in direction of the conductor end, d. at least one first contact zone (22) is provided on the busbar (21) or the clamping cage (2) for electrically contacting the inserted electric conductor end (5), and e. the clamping cage (2) has at least one elevation (203) in the conductor insertion region (L) on the at least one wall (20, 20'), said elevation extending from the wall (20, 20') into the receiving chamber (200) of the clamping cage (2) such that the inserted and contacted conductor end can rest laterally against the elevation.

Description

Direct plug-in compression spring connection

The invention relates to a direct plug-in compression spring connection for conductor ends, in particular for stranded conductor ends, according to the preamble of claim 1 . Furthermore, the invention also creates an electrical device according to the preamble of claim 20.

A generic direct plug-in compression spring connection is known from EP 2 989 685 B1.

Direct plug-in compression spring connections (also known as "push-in terminals") differ mainly due to their application, for example depending on the required current carrying capacity of the busbar, the spring force of the clamping spring and/or their installation conditions, in particular their size. Simple assembly, inexpensive production, a compact design and a permanently reliable clamping effect are basic requirements for such connections.

Properly wired direct plug-in compression spring connections with a clamping spring must offer a high degree of contact reliability. This includes reliable clamping and contacting of the conductor. For this purpose, for example, tests according to IEC 60947-7-1 are carried out with rigid and flexible conductor ends. A direct plug-in pressure spring connection with a clamping spring is connected to a conductor. The terminal with the conductor is then arranged in such a way that the contacted conductor projects downwards out of the terminal with its other end. A test weight is suspended from the end of the ladder. The conductor is guided through an off-centre opening in a rotating disc and repeatedly moved around its own axis. There must be no damage in the clamping area on the conductor.

The direct plug-in compression spring connection with a clamping spring also usually has to pass a conductor pull-out test afterwards. To test the tensile strength, the direct plug-in compression spring connection with a clamping spring must withstand a specified, cross-section-dependent tensile force for a specified period of time. The conductor must hold in the clamping point without being damaged. The object of the present invention is to improve the generic direct plug-in compression spring connection with a clamping spring with regard to such test requirements in a simple manner.

The object is achieved with a direct plug-in compression spring connection according to claim 1, i.e. by a direct plug-in compression spring connection for connecting a conductor end, in particular for connecting a stranded conductor end, which has the following:

- a terminal cage with a conductor rail and a clamping spring for contacting the electrical conductor end inserted into the direct plug-in compression spring connection in a conductor insertion area of the terminal cage,

- wherein the clamping cage has at least one wall - called the base wall - which extends parallel to a pivoting direction of the clamping spring,

- wherein the clamping cage also has at least one or more side walls, so that an L-shaped, U-shaped or rectangular cross section results for the clamping cage perpendicular to an insertion direction for the conductor end,

- At least one first contact zone for electrically contacting the inserted electrical conductor end being provided on the busbar or the clamping cage,

- And wherein the clamping cage has at least one elevation in the conductor insertion area on the at least one wall, which extends out of the wall into the receiving space of the clamping cage, so that the inserted and contacted conductor end can bear against it laterally - in particular on the outer circumference.

In this way, a direct plug-in compression spring connection with a clamping spring is created, which advantageously improves the reliability of the contacting of the conductor end with a means that is structurally simple and just as easy to produce in terms of production technology. The possible degrees of freedom of movement of the conductor end in the clamping cage are restricted by the elevation. In particular, a degree of freedom of movement of the conductor end, namely a movement of the conductor end perpendicular to the direction of movement of the clamping leg of the clamping spring, is significantly restricted or completely prevented by a simple design measure. The pivoting direction of the clamping spring defines a plane in which the clamping leg moves when pivoting. The base wall is parallel to this plane, i.e. laterally next to the clamping leg. There it limits the area in which a conductor end can move on this side. It is preferably located immediately to the side of the clamping leg.

The conductor rail can be a component that is separate from the clamping spring and that is inserted into the clamping cage or formed in one piece with it. The clamping spring is usually made of steel. The busbar is usually made of a highly conductive metal. The terminal cage is also usually made of metal, which is highly conductive if the busbar and terminal cage are formed in one piece. In this respect, the clamping cage and the conductor rail can also be designed in one piece.

According to a variant, the clamping cage can have two walls which extend parallel to the pivoting plane of the clamping arm. The walls then form two base walls, ie a first base wall and a second base wall. The first base wall can be designed as a type of rear wall and the second base wall can be designed as a cover, so that the clamping cage is delimited all around by the two base walls and the side walls and possibly a busbar in relation to its insertion direction, with one or both of the base walls in each case an elevation is formed in the conductor insertion area, against which the inserted conductor end can bear laterally on the outer circumference in the inserted and contacted state.

In this case, the at least one elevation can be designed as an elongate web. Provision can also be made for the elevation to be formed in one piece with the wall or for it to be attached to or inserted into the wall, in particular to be connected to it in a force-fitting and/or form-fitting and/or material-locking manner.

According to a preferred variant, it can be provided that the first base wall and/or the second base wall and the at least two side walls are formed in one piece from metal. This is particularly advantageous, especially since the elevation has a particularly long-term effect when it is made of metal. The elevation can then advantageously be formed as an embossing.

However, it can also be provided that the first base wall and/or the second base wall and the at least two side walls are formed in several pieces.

Then one or both base walls can in turn consist of metal and one or both base walls can have the elevation. But it can also expediently be provided that one or both of the base walls are made of plastic and that the elevation is formed on a base wall made of plastic, as well as on the second base wall if this is designed as a cover made of plastic.

It can further be provided that the respective elevation protrudes from the respective base wall perpendicularly to the pivoting direction of the clamping leg of the clamping spring.

In a preferred embodiment variant, the elevation can be designed as an elongate web on the base wall, which extends from the base wall to the interior of the clamping cage—in the direction of a contacted conductor. This results in a robust design of the elevation that is easy to produce in terms of manufacturing technology. It can also be particularly preferred if the bead extends perpendicularly to the conductor insertion direction. For this purpose, it can be provided that the clamping cage has the base wall and two side walls perpendicular thereto, with the base wall connecting the two side walls in a direction X perpendicular to the conductor insertion direction and with the elevation designed as a ridge in this direction X - protruding into the receiving space - on the base wall extends.

According to a further advantageous option of the invention, it can be provided that the elevation is preferably arranged in the area of a free end of the clamping leg of the clamping spring. The result of this is that a stripped end region of the conductor end is held/supported at a distance from the base wall of the clamping cage, either entirely or in sections, apart from the elevation.

The stop can be formed by a busbar section or a web of a superordinate plastic housing or the like.

In a further advantageous embodiment of the invention, the elevation is designed such that the freedom of movement is restricted in such a way that the contacted conductor end essentially only moves in the clamping cage parallel to the direction of movement of the clamping leg of the clamping spring in the clamping cage is possible. As a result, a circular movement of the conductor end in the clamping cage that can be triggered by tensile forces with shear force components acting in different directions on the conductor end is also significantly restricted or completely prevented. The movement parallel to the direction of movement of the clamping spring can be reliably controlled by the spring force of the clamping leg of the clamping spring acting on the end of the conductor.

According to a preferred embodiment, it can be provided that the elevation has an insertion bevel for the conductor end in the conductor insertion direction, so that a conductor does not come to rest on it when it is inserted, which could impair reliable contacting.

According to variants with which the conductor ends are each well secured against "migrating", it can be provided that the elevation forms a straight or essentially straight extending web or that the elevation forms an arched extending web. Provision can also be made for the elevation to be oriented at an angle of 10° to 90° or 10 to 180° to the conductor insertion direction, in particular perpendicular to the conductor insertion direction.

According to a further embodiment, it can advantageously be provided that the elevation extends transversely to the conductor insertion direction all the way to or close to the busbar, so that the conductor cannot be passed between the busbar and the elevation and can be placed directly on the base wall here, which reduces the effect of the elevation could affect.

According to an advantageous variant, it can also be provided that the conductor end has a stripped end region which rests against the elevation and the stop for limiting the conductor insertion path and which is spaced at least in the region or completely from the base wall due to the elevation. Because in this way a loosening of the conductor is again well prevented.

In a further optional embodiment of the invention, a second contact zone for contacting the end of the electrical conductor can be provided on the busbar. It can advantageously be provided that the second contact zone is spaced apart from the first contact zone and in a conductor insertion direction Y of the electrical conductor end is arranged behind the first contact zone. The second contact zone further improves the security of the contact.

Furthermore, the object is also achieved by an electrical device, in particular a terminal block or a connector, according to claim 20, which has a housing and one or more direct plug-in compression spring connections according to one of the claims related thereto, wherein for the one or more direct plug- Compression spring connection / connections are each formed a receiving compartment in the housing.

It can then be provided that the respective receiving compartment is delimited parallel to the base wall of the clamping cage on the side facing away from the base wall by a rear wall of the housing. However, the housing can also have a cover. The base wall and/or the cover can then have the elevation or each have one of the elevations.

Provision can also be made for the respective receiving compartment to be delimited at the bottom by the stop.

Further advantageous configurations of the invention can be found in the remaining dependent claims.

The invention is described in more detail below using exemplary embodiments with reference to the drawing. The invention is not limited to these exemplary embodiments, but can also be implemented in another way, literally, or in another way that is equivalent. It shows:

FIG. 1: a detail in section of an inventive direct plug-in compression spring connection with a clamping spring;

FIG. 2: a side view in section of the inventive direct plug-in compression spring connection with clamping spring from FIG. 1;

FIG. 3: a three-dimensional view of the contact cage of the direct plug-in compression spring connection with the clamping spring from FIG. 1; FIG. 4: a three-dimensional view of a terminal block with a plurality of direct plug-in compression spring connections according to the invention with a clamping spring;

FIG. 5: a front view of the terminal block with a plurality of direct plug-in compression spring connections according to the invention with a clamping spring from FIG. 4;

FIG. 6: in a) to c), in each case three-dimensional views of a contact cage of variants of the direct plug-in compression spring connection with clamping spring from FIG. 1;

FIG. 7: in a) and b) perspective views of sections of terminal blocks with further variants of direct plug-in compression spring connections with clamping springs from FIG. 1;

Figure 8: a spatial view of a direct plug-in compression spring connection

State-of-the-art clamping spring.

Various exemplary embodiments are described in the following description of the figures. The individual features of these exemplary embodiments can advantageously be used in combination with the respective further features of the exemplary embodiments. However, they can also be combined with other exemplary embodiments shown or not shown and are also suitable in each case as advantageous refinements of the objects described in one or more of the main and subclaims.

8 shows a direct plug-in pressure spring connection 1 with a clamping spring 3 according to the prior art.

The direct plug-in compression spring connection 1 with clamping spring 3 comprises a clamping cage 2 with a busbar 21 and the clamping spring 3 , which is provided for clamping an electrical conductor end 5 inserted into the direct plug-in compression spring connection 1 . The conductor end 5 can be a conductor end 5 of a relatively rigid solid conductor or, in particular, a conductor end 5 of a flexible, fine-stranded stranded conductor. The clamping cage 2 here has a substantially U-shaped cross-sectional geometry. The U-shaped cross section is formed by the base wall 20 and by a side wall 21 1 , which forms the busbar 21 here, and another side wall, formed here by a stop 24 . As already stated in connection with claim 1, other configurations are conceivable.

The clamping cage 2 is formed here in one piece from a sheet metal strip by stamping and bending. In addition, the clamping cage 2 forms the side walls, the side wall 21 1 , here also the busbar 21 .

The base wall 20 extends parallel to a plane spanned by an extension direction X and a conductor insertion direction Y. The side wall 21 1 or the conductor rail 21 is arranged transversely to the base wall 20 of the clamping cage 2 and therefore extends parallel to a plane spanned by a transverse direction Z and the conductor insertion direction Y. The conductor rail 21a can also be led out of the actual clamping cage 2 as an extension section in a plane that is spanned by the direction of extension X and the transverse direction Z, as is shown in another embodiment in FIG.

A first contact zone 22 for making electrical contact with the inserted electrical conductor end 5 can be provided on the conductor rail 21 . Alternatively, the first contact zone 22 can also be formed on the clamping cage 2 . The direct plug-in compression spring connection 1 can have a second contact zone 23 offset in the conductor insertion direction Y on the busbar 21 . The one or more contact zones 22, 23 can be formed as elevations in the conductor rail 21, which extend toward the conductor or toward the interior of the clamping cage.

The stop 24 serves as a stop for the clamping spring 3 . It also extends transversely to the base wall 20 and parallel to the conductor rail 21 . As a result, a receiving space 200 for the clamping spring 3 and for the conductor end 5 is formed between the stop 24 and the conductor rail 21 .

The clamping spring 3 essentially has a V shape. It has a holding leg 31 with which it is supported on one side wall, here on the stop 24 , and a clamping leg 32 which is provided for clamping the electrical conductor end 5 on the conductor rail 21 . The two legs 31 , 32 are connected to one another via a bend—a type of transverse web 30 . In this In the mounted state, the clamping spring can be placed over a pin in a housing made of plastic or the like.

The holding leg 31 can extend approximately in the direction Y of conductor insertion. The clamping leg 32 can have a bending point 33 . In this area, an actuating means such as a pusher in a housing can optionally act on them.

As a result, the clamping spring 3 comprises a first region 301 which extends from the holding leg 31 to the bending point 33 and in which the clamping spring 3 is approximately U-shaped. In this first region 301, the legs 31, 32 extend approximately in the conductor insertion direction Y. This means that they are arranged approximately parallel to the conductor insertion direction Y or at a shallow angle to the conductor insertion direction Y when the electrical conductor end 5 is not inserted. In addition, the clamping spring 3 can include a second area 302 . The bending point 33 is provided in such a way that the clamping leg 32 in the second region 302 extends approximately transversely to the conductor insertion direction Y, preferably at an angle of 70° - 90° to the conductor insertion direction Y. As a result, an open end 34 of the clamping leg 32 is Head end 5 between the first contact zone 22 and the second contact zone 23 is arranged.

The open or free end 34 of the clamping leg 32 is used to contact an inserted conductor end that is pressed here in the direction of the busbar. The conductor insertion area L is formed between the free end 34 and the busbar 21 . In or on the side of this conductor insertion area L is the elevation, which should be designed in such a way that an inserted conductor can rest against it. The conductor insertion area L is below the conductor insertion opening 81 and forms its extension in the area of the clamping cage.

The crossbar 30 is rounded here. Alternatively, it is also conceivable that a straight transverse web 30 is provided between the legs 31 , 32 . In addition, an embodiment is conceivable in which the clamping spring 3 does not have a transverse web 30, but instead the legs 31, 32 are connected directly to one another.

The rounded design of the transverse web 30 causes the clamping leg 32 to be pivoted about a spring axis 6 in a pivoting direction 61 toward the holding leg 31 when the electrical conductor end 5 is inserted. The holding leg 31 is supported on the stop 24 or a corresponding abutment. When the electrical conductor end 5 is inserted, the clamping leg 32 is pressed in the conductor insertion direction Y and pivoted in the pivoting direction 61 against its restoring force.

A clearance 25 for the clamping spring 3 is provided here between the first contact zone 22 and the second contact zone 23 . Free pivoting of the clamping leg 32 in and against the pivoting direction 61 is possible in the area of the clearance 25 .

In addition, a spring stop 222 for the clamping spring 3 is provided here between the first contact zone 22 and the second contact zone 23 and limits the pivoting of the clamping leg 32 against the pivoting direction 61 .

The first contact zone 22 and the second contact zone 23 are arranged here at opposite ends 201 , 202 of the busbar 2 or are only slightly spaced from the two ends 201 , 202 of the busbar 2 . Specifically, here the first contact zone 22 is arranged at the first end 201 and the second contact zone 23 is arranged at the second end 202 of the busbar 2 . Since the conductor rail 21 is connected to the side of the clamping cage 2, it can be freely configured at its opposite ends 201, 202.

A third contact zone 28 can be provided between the first contact zone 22 and the second contact zone 23 . The third contact zone 28 is spaced apart from the first and second contact zones 22, 23 in the conductor insertion direction Y of the direct plug-in compression spring connection 1. It is essential that at least one first contact zone is provided.

The clamping cage 2 is made in one piece with the busbar 21 and the stop 24 here. However, embodiments are also conceivable in which the stop 24 and/or the conductor rail 21 are manufactured separately from the clamping cage 2 and are attached to it.

If the clamping cage 2 is produced in one piece, it is preferably produced as a stamped and bent part from sheet metal, preferably sheet metal with good electrical conductivity, particularly preferably sheet metal alloyed with copper. A multi-piece Production in which the busbar 21 is produced separately has the advantage that only the busbar 21 can be made from relatively expensive copper-containing sheet metal, while the rest of the clamping cage 2 can be produced from a relatively cheaper, less electrically conductive material such as steel can be.

The clamping cage 2 can have an insertion chamfer 26 at its first end 201 .

The contact zone 22 for making contact with the conductor—here the first contact zone—can be formed by a linear edge of a web extending in the transverse direction Z. The web is formed by deforming/embossing busbar 21 . It is approximately nose-shaped in cross section, so that it has an insertion flank 221 on its upper side in the conductor insertion direction Y, which guides the conductor end 5 to the first contact zone 22 during insertion. An electrical conductor end 5 inserted into the direct plug-in compression spring connection 1 is preferably in contact with the tip of the lug. The nose is almost sharp-edged. This means that it has a small radius in order to increase the surface pressure, ie the contact pressure of the electrical conductor end 5 on the first contact zone 22, by means of a line contact. The underside of the nose serves as a spring stop 222. When the electrical conductor end 5 is not inserted, the clamping leg 32 of the clamping spring 3 rests against the spring stop 222. This embodiment prevents the open end 34 of the clamping leg 32 from digging into the busbar 21 . As a result, damage to the clamping spring 3 and the conductor rail 21 is avoided and an excessive actuating force is prevented.

As an optional second contact zone 23, the busbar 21 has a ramp 233 here, which is formed by a bend 211 in the busbar 21 and on which an approximately semi-circular cutout 231 is also provided. As a result, a stranded conductor 5 inserted into the direct plug-in compression spring connection 1 is not only guided along the ramp 233 but is also bundled in the cutout 231 . The second contact zone 23 also has a sharp-edged linear edge with a small radius in order to increase the contact force.

A third contact zone 28 can optionally be provided here between the first and the second contact zone 22, 23, which is spaced apart from the first and second contact zone 22, 23 in the conductor insertion direction Y. The distance 7 is between the first and second contact zones 22, 23 are provided everywhere the same, so that the open end 34 of the clamping leg 32 can be pivoted freely in this area and this area forms the clearance 25 at the same time.

A sufficiently rigid electrical conductor 5 introduced into the direct plug-in compression spring connection 1 is pressed with the open end 34 of the clamping leg 32 against the first and second contact zones 22, 23 and is mechanically in contact with them in the assembled state. The open end 34 of the clamping leg 32 is spaced apart from the first contact zone 22 and the second contact zone 23 both in the conductor insertion direction Y and in the direction of extension X. These three mechanical contact zones are therefore arranged in a triangle to one another. This ensures not only the electrical contact, but also the mechanical fixation of the rigid electrical conductor end 5 in the direct plug-in compression spring connection 1 .

A flexible electrical stranded conductor 5 inserted into the direct plug-in compression spring connection 1 is pressed with the open end 34 of the clamping leg 32 against the third and second contact zones 28, 23 and is mechanically in contact with them in the assembled state. The open end 34 of the clamping leg 32 is arranged approximately at the level of the third contact zone 28, but is spaced apart from both the third contact zone 28 and the second contact zone 23 in the direction of extension X. Therefore, the three mechanical contact zones are arranged in a triangle to each other.

1 shows an example of a direct plug-in compression spring connection 1 according to the invention.

Here, too, the direct plug-in compression spring connection 1 has a clamping cage 2 with a busbar 21 . Except for an elevation to be described, it can be designed like the connection 1 from FIG. 8, but it can also have only one busbar with a single contact zone for contacting the conductor.

Deviating from the illustration in FIG. 8, a housing 8 of a higher-level electrical device 100 (see FIG. 5 as an example) is also shown here that has at least one receiving compartment 80 in which the at least one direct plug-in compression spring connection 1 is inserted. The housing 8 has a conductor opening 81 into which a stripped end region 51 of the conductor end 5 is or can be inserted in the conductor insertion direction Y. Furthermore, the housing 8 has a rear wall 82 which together with the clamping cage 2 delimits the receiving space 200 in the region of the clamping cage 2 . The housing 8 also forms a stop 89 here, which limits the insertion of the conductor in the direction Y of conductor insertion. The conductor end 5 is inserted with its end region 51 up to the stop 89 in the clamping cage 2 or in the receiving space 200 . A receiving channel 87 for an actuator, in particular a pusher 88, can optionally be provided in the housing 8, with which the clamping spring 3 can be depressed in order to release a conductor from the direct plug-in compression spring connection 1 again and then be able to remove it. If no pusher 88 is provided, it can also be released through the receiving channel 87 with a screwdriver.

FIG. 2 shows the direct plug-in compression spring connection 1 from FIG. 1 in a side view in section. The holding leg 31 of the clamping spring 3 is supported on a stop 83 which is formed by the housing 8 . Furthermore, the transverse web 30 of the clamping spring 3 in the housing 8 is supported here on a support web 84 so that the spring axis 6 about which the clamping leg 32 moves in the pivoting direction 61 is located in the housing 8 here. The busbar 21 or the first side wall 21 1 of the clamping cage 2 is supported here on a first housing projection 85, and the second side wall 212 of the clamping cage 2 is also supported on a second housing projection 86, as a result of which the clamping cage 2 is held securely in the housing 8 and is secured against movement counter to the conductor insertion direction Y. The housing 8 is preferably made of a plastic material. The base wall 20 connects the two side walls 21 1 and 212 in a direction X perpendicular to the conductor insertion direction Y. The elevation 203 preferably also extends in this direction X, which also has a height at which it protrudes from the base wall 20 .

The direct plug-in compression spring connection 1 has a contact zone 22, which is shown in FIG. It can - but does not have to - also have one or more further contact zones. The clamping leg 32 of the clamping spring 3 presses the stripped end area 51 here in the positive conductor insertion direction Y below the contact zone 22 against the busbar 2. As a result, the conductor 5 experiences a counterclockwise torque. In order to ensure a secure hold and thus secure contact, even under strong tensile forces with circular or reversing shear force components that act on the conductor end 5 in the direction of extension X or in the transverse direction Z (e.g. in a test according to the IEC 60947-7-1 standard). of a stranded conductor end 5 in the direct plug-in compression spring connection 1, it is provided that the base wall 20 of the clamping cage 2 has at least one elevation 203, as is shown in FIG. 1 and—more clearly—in FIG.

The elevation 203 can be embodied as an embossing, in particular as an elongate bead, which protrudes perpendicularly to the direction of conductor insertion Y in the clamping cage 2 and extends longitudinally on the base wall 20 transversely to the direction of conductor insertion Y.

The elevation 203 can be designed as a closed bead (FIG. 3). However, the survey can also be designed to be open on one or more of its sides (see the survey in FIG. 3a). The opening of the respective side(s) of the elevation 203 designed as a bead can be produced by cutting out or punching out a recess or by cutting into the respective side of the bead.

In a further alternative embodiment of the elevation 203, the elevation can also be produced by applying an additional element, such as a metal strip of material, using a joining process, such as resistance welding.

The elevation 203 can form an essentially straight-shaped web (see FIG. 3). In this case, the elevation can preferably extend perpendicularly to the conductor insertion direction Y (FIG. 3, FIG. 6a). However, the elevation can also be aligned obliquely to the conductor insertion direction y, preferably at an angle of 30 to 150° to the conductor insertion direction. A variant is shown in FIG. 6b by way of example, in which the elevation 203 is aligned at an angle β of approximately 70° to the direction Y of the conductor insertion. According to a further variant, it can be provided that the elevation does not form a straight but an arched or curved web (see FIG. 6c).

The elevation 203 thus rises in the negative transverse direction Z with a height Z1 raised from the plane of the base wall 20 spanned by the extension direction X and the conductor insertion direction Y inwards into the Receiving space 200 of the clamping cage 2 or perpendicular to the pivoting direction 61 of the clamping leg 32 of the clamping spring 3.

The base wall 200 connects the two side walls 21 1 and 212 in a direction X perpendicular to the conductor insertion direction Y. In this direction X preferably also extends the elevation 203 designed as a web-like bead with a width X1. In addition, the elevation has an extension Y1 in depth in the conductor insertion direction.

The dimensions X1 and Y1 of the elevation 203 are preferably selected in such a way that they do not affect a spring deflection of the clamping spring 3 and its effect. The height Z1 is preferably selected in such a way that a maximum usable conductor cross section of the terminal is not affected or reduced.

In conductor insertion direction Y, elevation 203 can protrude at an angle from base wall 20, initially in this direction not abruptly but steadily increasing in height, so that a type of insertion bevel 203a is formed, on which conductor end 5 can slide, so that the conductor end can be inserted 5 is not impeded by survey 203 in this area. Otherwise, the end of the conductor 5 could, for example, hit the elevation 203 during insertion without being inserted any further past it up to the stop 89 .

The elevation 203 preferably extends in the X direction perpendicular to the conductor insertion direction Y. It can be provided that it has such an extent and arrangement that a conductor end cannot slip past it. The elevation 203 can be brought up to the busbar 21 on one side. On the other side, it is so long that a conductor end cannot slide past it either, but can come to rest against it on the side.

The possible degrees of freedom of movement of the conductor end 5 in the clamping cage 2 are restricted by the elevation 203 (see also FIGS. 1 and 2). In particular, a degree of freedom of movement of the conductor end 5, namely a movement of the conductor end 5 parallel to a plane spanned by the conductor insertion direction Y and the transverse direction Z or perpendicular to the pivoting direction 61 of the clamping leg 32, is restricted by the elevation 203. Be particular also circular movement of the conductor end 5 in the clamping cage 2, which could loosen this, significantly restricted or prevented.

Due to the elevation 203, essentially only a movement of the stripped conductor end 5 to be contacted or contacted in the clamping cage 2 is possible parallel to the pivoting direction 61 of the clamping leg 32 of the clamping spring 3, but this is due to the conductor end 5, more precisely to the stripped end region 51 of the conductor end 5 acting spring force of the clamping leg 32 of the clamping spring 3 can be safely controlled.

The extension direction of elevation 203 is on base wall 20 perpendicular to first side wall 211 or busbar 21 of terminal cage 2 or transverse to conductor insertion direction Y or parallel to extension direction X. Elevation 203 preferably extends approximately transverse to conductor insertion direction Y and thus also transverse or substantially transverse to the end of the conductor 5.

So that elevation 203 can limit the possibility of movement of conductor end 5 in clamping cage 2 as effectively as possible in a plane spanned by conductor insertion direction Y and transverse direction Z or in a plane perpendicular to the plane of movement of clamping spring 3, elevation 203 is preferably on or in the area of the free end 34 of the clamping leg 32 of the clamping spring 3 or a clamping point (with an inserted conductor) in the base wall 20, as shown in Fig. 1, so that a maximum conductor inserted in the area of the stripped end area 51 of survey 203 is applied.

The result of this is that the stripped end area 51 of the conductor end 5 is spaced apart from the base wall 20 of the clamping cage 2 at least in sections--or completely. The stripped end area 51 of the conductor end 5 rests against the elevation 203 . The stop 89 can be designed at least partially as a busbar 21a, as shown in FIG.

Only a single elevation 203 is shown in FIG. 1 or in FIG. 3. However, several such elevations 203 can also be provided on the base wall 20. According to FIG. 3 and FIGS. 6a to 6c, it is advantageously and simply provided that the base wall 20 and the at least two side walls 211, 212 are designed in one piece. They then preferably consist of a metal, in particular a metal with good conductivity, in particular if one of the side walls also assumes a current-conducting function or forms a busbar. In this respect, a separate conductor rail could also be used in a clamping cage (not shown here). This can be implemented in a wide variety of exemplary embodiments and not only in those shown in FIG. 3 and FIGS. 6a-c.

However, it can also be provided that the first base wall 20 and/or the second base wall 20' and the at least two side walls are formed in several pieces. It can also be provided that the base wall 20 is made of plastic and one of the side walls can also be made of plastic. Only one of the side walls has to be in the form of a busbar 21 . This can be implemented, for example, on a plastic housing that then accommodates the busbar. This is shown by way of example in FIG. 7. The clamping spring 3 is supported here in the area of its upper bend and on its holding leg 31 in the housing 8 made of plastic. However, it can also be supported on the holding leg on a metallic side wall of a clamping cage.

The base wall 20 is thus designed as the rear wall of the housing 8 and is made of plastic. The elevation 203 can then be formed on it.

The elevation 203 can be designed in a wide variety of ways, for example geometrically in the manner of FIG. 3 or in the manner of one of FIGS. 6a to 6c. The effect then corresponds to the effect of one of these exemplary embodiments. Such an embodiment is shown in FIG. 7a, but without the clamping spring 3. The clamping spring 3 is shown in FIG. 7b and can be configured and supported in FIG. 7a as in FIG. 7b.

FIG. 7b shows that a second base wall 20' can also be provided. In this case, this second base wall is advantageously a type of cover that is formed parallel to the first base wall 20 . In Fig. 7b it is shown in an unfolded state before assembly. Pins 204, 205 are used for assembly here to engage in corresponding holes 801, 802 of the housing 8. Alternatively or additionally, an elevation 203 can also be formed on this cover. Such an embodiment is shown in FIG. 7b. Alternatively, the second base wall 20 ′ can also be designed in one piece as part of the housing 8 .

In Fig. 4 and Fig. 5, an electrical device is shown, here designed as a terminal block 100, which is mounted on a support rail, here a top-hat rail 10, and a plurality - here five - inventive direct plug-in compression spring connections 1 having.

In the housing 8 of the device, here in the terminal block 100 (or in a connector or the like.) One or more receiving compartments 80 are formed, in each of which one of the direct plug-in compression spring connections 1 is used. In the region of the respective receiving compartment 80, the housing 8 also delimits the receiving space 200 of the respective direct plug-in compression spring connection 1 parallel to the base wall 20 of the clamping cage 2 of the respective direct plug-in compression spring connection 1 with its rear wall 82. The respective receiving compartment 80 is therefore here overall vertical to the conductor insertion direction Y- surrounded on three sides by the clamping cage 2 and limited on one side by the housing 8 . The respective receiving compartment 80 is delimited at the bottom by the stop 89 . The respective receiving compartment 80 can also form one of the base walls 20, 20'' and have the respective elevation 203.

Reference sign

1 direct plug-in compression spring connection

10 DIN rail

100 terminal block

2 clamping cage

20 base wall

200 recording room

201 end

202 end

203 elevation

203a lead-in slope

204 cones

205 cones

21 power rail

21a busbar

211 side wall

212 side panel

22 contact zone

221 lead-in flank

222 spring stop

23 contact zone

231 excerpt

233 ramp

24 stop

25 clearance

26 insertion phase

27 top edge

28 contact zone

3 clamping spring

30 cross bar

31 retaining legs

32 clamping legs

33 bending point

34 open end

5 conductor end 51 stripped end area

6 spring axle

61 pan direction

7 clearance 8 housing

80 recording compartment

81 ladder opening

82 back panel

83 stop 84 support bar

85 housing protrusion

86 housing protrusion

87 recording channel

88 pusher 89 stop

801 hole

802 hole

conductor entry area

Claims

Claims Direct plug-in compression spring connection (1) for connecting a conductor end (5), in particular for connecting a stranded conductor end, which has the following: a. a clamping cage (2) with a conductor rail (21) and a clamping spring (3) for contacting the electrical conductor end (5) inserted into the direct plug-in compression spring connection (1) in a conductor insertion area (L) of the clamping cage, b. wherein the clamping cage (2) has at least one wall - a base wall (20, 20') - which extends parallel to a pivoting direction (61) of the clamping spring (3), c. the clamping cage (2) also having at least one or more side walls (21 1 , 212), so that the clamping cage (2) has an L-shaped, U-shaped or rectangular cross-section perpendicular to an insertion direction for the conductor end, d . at least one first contact zone (22) for electrically contacting the inserted electrical conductor end (5) being provided on the conductor rail (21) or the clamping cage (2), characterized in that e. the clamping cage (2) has at least one elevation (203) on the at least one wall (20, 20') in the conductor insertion area (L), which protrudes from the wall (20, 20') into the receiving space (200) of the clamping cage (2nd ) extends so that the inserted and contacted end of the conductor can bear against it laterally. 3) that form a first base wall (20) and a second base wall (20') and that the elevation (203) is formed in the conductor insertion area (L) on one base wall or both base walls (20, 20'). Direct plug-in compression spring connection (1) according to Claim 1 or 2, characterized in that the respective elevation (203) protrudes from the respective base wall (20, 20') perpendicularly to the pivoting direction (61) of the clamping leg (32) of the clamping spring (3). . 4. Direct plug-in compression spring connection (1) according to any one of the preceding claims, characterized in that the at least one elevation (203) is designed as an elongated web.

5. Direct plug-in compression spring connection (1) according to claim 1, 2, 3 or 4, characterized in that the elevation (203) is formed in one piece with the wall or that it is attached to or inserted into this.

6. Direct plug-in compression spring connection (1) according to one of the preceding claims, characterized in that the first base wall (20) - and/or the second base wall (20') - and the at least two side walls (211, 212) are made in one piece from metal are.

7. Direct plug-in compression spring connection (1) according to claim 5, characterized in that the elevation (203) is formed as an embossing in metal, which extends from the base wall (20, 20') to the interior of the clamping cage (2).

8. Direct plug-in compression spring connection (1) according to one of the preceding claims, characterized in that the first base wall (20) and/or the second base wall (20') and the at least two side walls (211, 212) are designed in multiple pieces.

9. Direct plug-in compression spring connection (1) according to one of the preceding claims, characterized in that one or both of the base walls (20, 20') are made of plastic.

10. Direct plug-in compression spring connection (1) according to any one of the preceding claims, characterized in that the elevation is designed as a plastic web.

11 . Direct plug-in compression spring connection (1) according to claim 8 or 9, characterized in that the second base wall (20 ') as a cover made of plastic is formed, which is integrally formed on the housing or is attached to this. Direct plug-in compression spring connection (1) according to any one of the preceding claims, characterized in that the elevation (203) protrudes from the base wall (20, 20') with a height (Z1), this height being chosen such that a maximum usable Conductor cross-section compared to a compression spring connection is not or not substantially reduced without collection. Direct plug-in compression spring connection (1) according to one of the preceding claims, characterized in that the dimensions of the elevation (203) do not affect a spring deflection of the clamping spring (3) and its effect. Direct plug-in compression spring connection (1) according to one of the preceding claims, characterized in that the elevation (203) in the conductor insertion direction Y forms an insertion bevel (203a) for the conductor end (5). Direct plug-in compression spring connection (1) according to any one of the preceding claims, characterized in that the elevation (203) forms a web which extends straight or essentially straight. Direct plug-in compression spring connection (1) according to one of the preceding claims, characterized in that the elevation (203) forming a straight or essentially straight extending web is at an angle (ß) of 10° to 170° to the conductor insertion direction (Y) is aligned, in particular perpendicular to the conductor insertion direction (Y) in direction (X). Direct plug-in compression spring connection (1) according to one of the preceding claims, characterized in that the elevation (203) forms a web extending in an arc. Direct plug-in compression spring connection (1) according to one of the preceding claims, characterized in that the elevation (203) extends transversely to the conductor insertion direction (Y) right up to or close to the busbar (21), so that the Head end (5) can not be placed on the base wall (20) in the area between the survey (203) and the busbar (21).

19. Direct plug-in compression spring connection (1) according to one of the preceding claims, characterized in that the elevation (203) is preferably arranged in the conductor insertion direction (Y) in the region of a free end (34) of the clamping leg (32) of the clamping spring (3).

20. Direct plug-in compression spring connection (1) according to one of the preceding claims, characterized in that the stop (89) is formed by a busbar (21a) and/or by a plastic web or the like of a housing (8) for receiving the direct plug-in compression spring connection (1) is formed.

21 . Direct plug-in compression spring connection (1) according to one of the preceding claims, characterized in that the conductor end (5) has a stripped end region (51) which rests against the elevation (203) and the stop (89) for limiting the conductor insertion path and due to the Elevation is spaced to the base wall.

22. Electrical device, in particular terminal block (100) or plug connector, characterized in that it has a housing (8) and one or more direct plug-in compression spring connections (1) according to one of the preceding claims, wherein for each direct plug-in compression spring connections (1). Storage compartment (80) is formed in the housing (8).

23. Electrical device, in particular terminal block (100) or connector according to claim 22, characterized in that the respective receiving compartment (80) parallel to the base wall (20) of the terminal cage (2) on the side facing away from the base wall by a rear wall of the housing ( 8) is limited.

24. Electrical device, in particular terminal block (100) or connector according to claim 23, characterized in that the rear wall of the housing (8) forms the base wall (20).

25. Electrical device, in particular a terminal block (100) or plug connector according to claim 24, characterized in that a cover of the housing (8) forms the base wall (20'). 26. Electrical device, in particular terminal block (100) or connector according to one of claims 23 to 25, characterized in that the respective receiving compartment (80) is limited at the bottom by a stop (89).