FI95633B - Screwless connection and its manufacturing method - Google Patents

Abstract

The invention relates to a connecting clamp without screws for a contact rail (2) such as an edge earthing clip for a wall socket or the like, having a metallic clamp support (1) with two push-in channels (22), located side-by-side at a distance, to form push-in regions for holding in each case a stripped end section of a connecting conductor, and having a central part (11), arranged between the push-in channels (22), with a spring holder (21) for holding an integral clamp spring (14), which can be inserted from outside and has two pairs of tongues each with two tongues (32, 33) located one behind the other, it being possible to insert in each case one tongue pair into one push-in region. For ease of manufacture and good material utilisation, according to the invention a recess (4) is constructed in the contact rail (2, 2'), into which the central part (11) of the clamp support (1), constructed separately from the contact rail (2, 2'), can be inserted, each push-in region is formed in regions by a contact part web (36) of the contact rail (2, 2') and the clamp spring (14) can be inserted into the spring holder (21) such that the clamp holder (1) and the end section of each connecting conductor are fixed by pretension with respect to the contact rail (2, 2') and with respect to the associated connecting section. Each clamp support (1) can be connected in a simple manner to a plug contact (2, 2'), it being possible to isolate the clamp support (1) by pressing the clamp support (1) into the recess (4). <IMAGE>

Description

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Screwless connection and its manufacturing method

The invention relates to a screwless connection with a contact rail, for example an edge grounding clamp of a wall socket 5, the connection having a metal connector bracket with two spaced adjacent insertion channels for the conductor-removed end, a central portion 10 between the insertion channels, for an externally insertable, one-piece locking spring with two pairs of tongues, each with two consecutive tongues, each pair of tongues being pushed into one insertion area.

In this type of screwless connection 15 (DE-U1 87 04 494.3), the connector switch has a one-piece construction with a contact rail, which is made by forming or pressing a metal strip made of a suitable electrically conductive material, for example brass. The insertion areas consist entirely of 20 insertion channels in the connector bracket. The coupling connector, the insertion areas of which are located outside the connector bracket, transverse to the longitudinal direction of the contact rails, can be easily and reliably inserted. However, since the support bracket and the contact rail of the connector 25 are one-piece in construction, manufacture is relatively cumbersome because the walls of the connector bracket must necessarily be the same thickness as the walls of the contact rails. In this case, it cannot be taken into account that the contact rails must have thicker walls than the walls of the connector bracket, which in this case are subjected to a lower load, in order to provide sufficient mechanical strength.

A further known screwless coupling connector 35 (DE-U1 84 24 056.3) has a cover separate from the base part.

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The insertion areas of the connecting conductor for electrically conductive joints are then openings in the cover and are otherwise formed without a base only between the tabs of the cover and the locking spring. In order to attach the cover to the bottom part, the ends of the side walls of the cover must be bent through the openings in the bottom, which complicates manufacture. Furthermore, the locking springs must be placed before the cover is attached to the base part in the spring-loaded part formed by both parts. 10 The biasing force applied to the connecting conductor of the lock spring, which affects the operation of the electrically conductive connection, thus depends on the accuracy with which the cover is attached to the base part. Furthermore, such a component, which is connected only to the cover and does not cover the lock spring, possibly with an advantageous surface galvanizing treatment for increasing the electrical conductivity or corrosion resistance is not possible.

The object of the invention is to further develop a species-specific screwless connector so that, with high operational reliability, simplification of manufacturing and material savings are possible.

It is a further object of the invention to provide a simple method of manufacturing a screwless connector according to the invention.

The screwless coupling connection according to the invention is characterized in that the contact rail has an opening into which the central part of the connector bracket separate from the contact rail can be inserted, that each insertion area is formed by the contact rail the connector bracket and the ends of each connecting conductor are secured against the contact rail or connector by prestressing.

The invention also relates to a method for manufacturing a coupling connector according to any one of claims 1 to 9, which is characterized in that the connector brackets are produced by compression molding and stamping from a metal plate, whereby the connector bracket is detached from the metal plate when inserted into the contact rail opening.

Due to the fact that according to the invention the connector brackets are separate components from the contact rails, the manufacture is simplified, whereby the diversity of the design to be performed and the necessary tools is reduced, and in this case, independently, only the shape of the contact rails or the connector bracket has to be taken into account.

In addition to simplifying the manufacture, the separate structure 15 of the contact rails and the connector bracket also achieves a greater freedom of design with respect to the positioning of these parts relative to the space. In this way, it is possible to deviate, for example, from the order of the prior art according to which the insertion areas are located substantially transversely to the longitudinal axis 20 of the contact rails.

Furthermore, the contact rails and the connector bracket can, for example, be made of a different steel strip material. In this way, the contact rails can be compressed and molded in an advantageous manner to obtain sufficient strength from a brass film with a wall thickness of about 0.9 mm, while the walls of the bracket plate can be thinned to a thickness of 0.5 mm to produce a connector wall subjected to less mechanical stress. . According to the invention, it is thus possible to achieve material-saving material savings in the case of couplings manufactured in large batches.

According to the invention, the connection of the connector bracket to the contact rail takes place in a simple and easily automated manner, so that the central part of the connector bracket 35 is passed through an opening in the contact rail.

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Furthermore, according to the invention, each insertion area is formed not only by the connecting rail of the connector bracket, but also in each region also by the contact rail connecting piece, and the locking spring can be positioned so that the connector support and the end of each connecting cable are biased to the contact rail or connecting piece. in relation to. As a result, without further action, a secure mechanical connection is provided between the contact rail and the connector bracket 10 on the one hand, and a highly electrically conductive connection between the connection conductor and the coupling connector on the other hand. The locking spring thus has two types of function according to the invention, on the one hand it must provide a bias between the connector bracket and the contact rail to secure the connector bracket 15 securely and on the other hand a bias acting on each connecting conductor to provide a functional electrically conductive connection.

When the connecting cable is pushed into the connecting rail, as the bias caused by the locking spring increases, the connection between the contact rail and the connector bracket also becomes even tighter.

In a preferred embodiment, the opening is bounded on the side by two steps parallel to the longitudinal axis of the contact rail, each side having a mounting surface for it on the side of the locking spring of the respective step, and the side on the locking spring side of the step forming a connection point. The above-mentioned dual function of the locking spring then causes, in a simple manner, that on the opposite side of the locking spring side of the step 30, the fastening surface is part of the connecting rail or the connector support. The opposite side, on the spring-loaded side of the step, in each case forms a connection point against which the end removed from the insulation of the connecting conductor can be pressed.

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In a further preferred embodiment, each tie rail has a U-shaped cross-section for staggering, wherein the mounting surface is formed by a U-shaped mounting surface of the cross-section. In this way, the bracket of the 5 connectors can be manufactured particularly simply to have sufficient strength and shape, and can be simply and securely connected to the contact rail.

It has proven advantageous that each step-10 has a recess along the longitudinal axis. Thanks to this recess, the stiffness of each step and thus the stiffness of the entire contact rail in the region of the opening can be increased in a simple, material-saving manner. The consequent shape stability is very advantageous when the contact rails act, for example, as an edge earthing point for the protective plug box. In this case, it is required that the spring pressure remain constant for the grounding contact. In the absence of such a recess, the application of the coupling connector to said application may result in the contact pressure extending and remaining unchanged only at the edge grounding point unilaterally away from the opening and not at the edge grounding point adjacent to the opening.

If the recess is now further positioned in such a way that a recess is formed in the direction of the locking spring, it is now possible to increase the functionality of the power plant or to reduce the boundary resistance by locating the end removed from the insulation of the connecting conductor. In this way, the shape of the respective insertion area can be modified in a simple manner by means of a corresponding recess so that the contact resistance to the connecting conductor can be minimized.

In a further preferred embodiment, the opening has a cross-sectional surface substantially transverse to the longitudinal axis as a cutting edge for separating the connector brackets when inserted into the opening. This further simplifies the manufacture and connection of the connector bracket to the contact rail. In this case, for example, from the point of view of automatic installation, the supply of the connector brackets 5 is simplified, which brackets are still in contact with the strip of material from which they are made until they are cut into the opening of the respective contact rail by their cutting edge.

For simple and secure positioning of the connector bracket in the contact rail opening, it has further proven advantageous to place longitudinal axial disadvantages and recesses in the contact rail and the connector bracket, which then engage and secure the connector bracket 15 to the contact rail.

In a particularly simple manner, a cavity can then be placed at the front or rear end of the outer branch of each tie rail, into which the disadvantage on the side of the adjacent step can be inserted.

In a further preferred embodiment, the central part has a U-shaped cross-sectional area with two central branches, and the transverse surface of the opening has two grooves for these central branches. When each central fork thus engages the opening, the connector bracket 25 can be simply and securely attached to the contact rail in a predetermined position when inserted into the opening.

The placement of the connector bracket and its attachment to the contact rail can be further improved in an advantageous and simple manner by having a groove on the other transverse side approximately opposite the groove. two steering angles for steering each part of the middle fork.

The object of the manufacturing method is achieved according to the invention by a method for manufacturing a coupling connector according to one or more features, according to which the connector bracket is made of sheet metal by pneumatic molding and pressing, whereby the connector bracket to be inserted into the contact rail opening is separated from the sheet metal.

5 Because the connector brackets are only removed from the metal plate when they are connected to the contact rail, they can be connected with very little handling and in an easily automated manner to form a connection connector to the contact rails.

10 The connector bracket is then removed or separated using a stamping tool or cutting tool suitable for this purpose. It has proven to be particularly advantageous if the separation takes place by means of the transverse edge of the opening formed as a cutting edge. The separation then takes place without further action when the connector support is pressed into the opening of the contact rail, for example by means of a forcing punch or the like.

Furthermore, it is possible to perform the electroplating of the contact rail and the surface of the connector bracket inserted therein before inserting the lock spring into the opening for the lock spring of the connector bracket. In this case, for example, by means of nickel plating or tinning, the stability, corrosion resistance and electrical conductivity of this type of component can be improved.

The two embodiments of the coupling connector according to the invention and the method of manufacturing them are explained in more detail by means of a drawing.

Fig. 1 is an exploded perspective view of a contact rail, connector bracket and lock-30 spring constructed as a socket edge grounding pin, Fig. 1a is an enlargement of Fig. 1, Fig. 2 is a perspective view of an installed coupling connector with plug-in contact rail and connector bracket and lock spring according to Fig. 1 Fig. 3 is an enlarged perspective view of a portion of the contact rail of Fig. 1 or 2 with a connector bracket and a lock spring shown in the placement direction but not yet installed; Fig. 4 is a view similar to Fig. 3 with the lock spring inserted into the connector bracket, and Fig. 5 is a simplified perspective view of the manufacturing steps of the connector bracket, including the step of attaching the respective connector bracket to the touch rail.

Fig. 1 is an exploded perspective view of the structure and manufacture of a connection connector according to the invention, for example an edge ground rail of a wall socket or another contact rail for a similar purpose.

In step a) of the method, the connector cover or connector bracket 1 is manufactured. The connector bracket 1 is made by pressing and bending the metal plate 16 shown in Fig. 5. The connector brackets 1 are preferably not manufactured as individual parts, i.e. they are not separated before they are mounted on the contact rails 2, 2. '. The connector brackets 1 thus remain connected to one another first by means of connecting pieces 24 located in the insertion direction 28 or 25 of the connecting conductor in the direction of the metal plate 16 (connecting set).

In a separate step b) of the method, plug contacts or contact rails 2, 2 'are produced, for example by pressing, bending and / or sawing. The plug contact 2 in Fig. 1 is the ground rail of the protective contact socket.

In the example shown in Fig. 2, the plug contact or .. contact rail 2 'has at least one plug contact 2 °.

The plug contacts 2, 2 'can also advantageously be located in the connection set. It is essential for the structure of the coupling connector according to the invention that the plug contact 2, 35 2 'has a pressed recess or opening 4, the size and shape of which are adapted to the connector holder 1.

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In step c) of the method, a lock spring 14 is made. The lock springs 14 are pressed and bent from a metal plate; it corresponds substantially to the prior art according to the art (DE-Ul-87 04 494.3), and in step d) the connection of the connector 1 of the connector 5 and the plug contact 2, 2 'take place together as shown in Fig. 5. The connector bracket 1 having a U-shaped central part or a central part 11 with a U-shaped base 7 is first pressed into the opening 4 of the plug contact 2, 2 '. In the example, the n-shaped letters, i.e. the U-shaped cross-section tie rails 22 through which an insertion channel is formed for the end of the electrical connection conductor removed from the insulation, not shown here, surround the longitudinal sides of the opening 4. The tie rails 15 22 comprise a U-shaped cross-section as the mounting surface 52 for mounting the area surrounding the opening 4 of the mounting surface; they further have branching areas 53 projecting from the mounting surface 52.

In step i) of the method, the locking spring 14 is inserted 20 into the opening 21 in the connector bracket 1 provided for this purpose. The locking spring tensions the plug contact 2, 2 'at the ends of the spring. The ends of the spring bend in the insertion direction 28. The end removed from the insulation of the connecting conductor can be inserted into the connecting rail 22 or the insertion channel formed by the connecting rail 22 in the insertion direction 28. The locking spring 14 contacts the connecting conductor by a spring force against the plug contact 2, 2 '.

Figures 1 to 4 show the structure of the connector bracket 1. The connector bracket 1 is made of metal plate 30 by pressing and bending. It is, viewed in the insertion direction 28 of the connecting conductor, U-shaped, with downwardly projecting - as seen in the direction of the U-bottom - open, n-shaped tie rails 22 at the ends of the U-forks. In each tie rail 22, which are then of opposite cross-section U-shaped 10 95633, has a mounting surface 52 in the U-shaped tip region. The outer surfaces of the n-forks or the outer branches of the U- or n-shaped cross-section correspond to the branch areas 53, and the n-arcs are mounting surfaces or tie-5 rails 52. The height of the branch areas 53 is about a third of the height of the U-beam.

The structure of the connector bracket 1 is as follows: viewed in the insertion direction 28, the leading edge has a step 15 in the U-bottom 7 of the central part 11 in the opposite direction to the insertion direction 28. Viewed in the insertion direction 28, at the rear edge of the connector support 1, there may be a step left in the push direction 28 in the bottom region 7 of the central part 11. The step 15 and the step residue are generated by separating the connector supports 24 or separating them separately from the connection set (Fig. 5). Viewed in the insertion direction 28, the front U-forks or the middle forks 37 are stamped with an opening 21 for a locking spring 14. Viewed from the direction of the U-forks, the spring opening 21 consists of six 20 areas in each end region of the U-fork. Viewed from the insertion direction 28, the first area is the bottom area 7 of the U-shaped central part 11. Its length is about one third of the length of the U-bottom. These areas join the oblique 41 rising upwards by about 45 ° in the direction of insertion. These oblique 41 further extend into an area covering one third of the total length of the U-base. Approximately in the center of each oblique 41 is a mounting cam 27 projecting from the oblique 41 in a direction opposite to the pushing direction 28. The mounting holes 38 of the locking spring 14 are inserted into the mounting cam 27.

· After the slopes 41, follow the third surfaces, which run approximately perpendicular to the base 7. These sub-areas 49 reach a height of about three-quarters of the height of the U-branch. The sub-areas 49 are 35 radially on the support areas 44. The support areas 44 are parallel to the reflection 7 and extend in an area opposite to the pushing direction 28 to an area covering about one third of the length of the U-base.

In each case, an insertion channel is formed via the outer branch areas 53, the tip area or the fastening areas 52 and the central part 11 and thus the connecting rails 22. The connector bracket 1 thus has two spaced-in insertion channels 28 passing through the central part 11, which together with the plug-in chain 2, 2 'affect the formation of the insertion areas of the end removed from the insulation of the connecting conductors.

The bevels 41 and the sub-areas 49 support a spring force acting against the locking spring 14 on the connecting conductor or the plug contact 2, 2 '. By means of firm slopes, the closing ends 35 of the locking spring 15 14 remain at a suitable distance from the lower edge of the plug contact 2. This small gap makes it easier to insert the connecting cable into the connection terminal. The second guide stage, i.e. the outer n-branch 53, has recesses 25 in the end region for attachment. The width of these attachment recesses 20 is approximately the same as their height. They are located below the 22 n-bend of the tie rails. The mounting holes 25 function for attaching the connector bracket 1 to the plug contact 2, 2 '. When the connector cover 1 is completely pressed into the plug contact 2, 2 ', the mounting surfaces of the respective mounting projections 20 of the plug contact 2, 2' 25 engage in the mounting holes 25 of the connector bracket 1.

Viewed in the insertion direction 28, the rear end regions of the central branch act as guide bevels 26. The guide bevels 26 may be at an angle of 95 ° to the bottom 7 in the insertion direction 28. The guide bevel 26 starts from the U-bottom of the base 7 ··. The vertical of the rearmost n-shaped outer branch may meet at the bottom of the starting point 7 of the guide bevels 26. The ends of the guide bevels 26 may be . These guide bevels 26 guide the connector bracket 1 during the connection phase, i.e. by inserting the connector bracket 1 into the plug connection 2, 2 '5 into the guide holes or grooves 8 of the plug connection 2, 2' 5. This structural operation of the connector bracket 1 and the guide holes 8 insertion into the plug connection 2. In the final position, with the fastening projections 20 closed in the recesses 25, a high reproducibility and reliability are achieved.

In order to provide an accurate and stable position and attachment of the connector bracket 1 to the opening 4 of the plug connection 2, 2 ', two guide angles 23 can be placed on the transverse edge 15 opposite the guide grooves 8 of the opening 4, which can apply pressure to the end of the central branch 11 to press the guide slots 26.

Fig. 5 shows a connector bracket 1 in a connection set illustrated in connection with Figs. 1, 2, 3 and 4. Viewed in the insertion direction 28, a recess 21 for the spring of each connector bracket 1 is located at the front. The connector brackets 1 are connected to each other via connection steps 24. In the insertion direction 28 cat-25, the last connector bracket 1 may have at the front bottom 7 a residue 18 of the step as seen in the insertion direction, which remains from the connection step 24 of the last disconnected connector bracket 1.

Figure 1 shows a part of the plug connection 2, 2 ', which is important for the structure of the coupling connector.

·. With respect to the longitudinal axis 12, the plug connection 2, 2 'is symmetrical. The upper surface of the connecting part 2, 2 ', viewed from the pushing direction 6 of the connector support 1 on the front surface, has a rectangular opening 4. The longitudinal sides of the opening 4, which are parallel to the longitudinal axis 12, are straight. The transverse sides of the opening 4 are structurally shaped. Viewed in the insertion direction 28, the front transverse side has an opening 17 enlarging the rectangle in the opposite direction to the insertion direction. The width of the opening 17 is shorter than the distance between the longitudinal sides. The opening 17 forms a guide angle 23 with the longitudinal sides. Seen in the insertion direction 28, the rear transverse side has a guide projection 19 projecting in the opposite direction to the insertion direction 28. This forms guide grooves 8 with the longitudinal sides of the opening 4 10. The guide grooves 8 correspond in width to the 8 guide the connector bracket 1 when connecting the U-shaped base of the connector bracket 1 to the plug connector 2, 2 '. The guide grooves 15 8 guide the guide chamfers 26 of the connector bracket 1 as the connector bracket 1 is further pressed until the parts lock. In the locked position, the guide grooves 8 lock the U-forks of the connector bracket 1 at a predetermined distance between the guide grooves.

The longitudinal sides of the opening 4 together with the outer edges of the plug connector 2, 2 'form a stepping of the contact rails, i.e. a stepping 36. The width of the steps 36 of the contacting rails corresponds to the internal distance of the n-branches of the connecting rails 22. The contact rail steps 36 may have openings and may be curved in cross section. Contact with the rails 36 of the outer edges of the stairs can flex downwardly 6 viewed from the mouth of the press-direction side of the connector 2, 2 ', the strength of the material somewhat. The steps 36 of the contact rails thus have protrusions 29, the shape of which corresponds to the shape of the n-arc of the connecting rails 22 of the support 1 of the connector 30. The surfaces of the contact rail steps 36 on the locking spring 14 side thus have openings 30 into which the connecting conductors can be inserted.

The highest protrusion of the protrusions 29 may form a plane 35 with the material surface of the plug connector 2, 2 '.

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The outer edge of the contact rail step 36 has fastening projections 20 at the height of the corners of the opening 4. The fastening projections 20 can extend the outer edges of the contact rail step 36 into two parts. The first part 5 may comprise a fastening surface at right angles to the longitudinal axis 12 and the second part a guide surface further spreading the plug connector 2, 2 '. The combined width of the mounting surface and the guide surface corresponds approximately to the wall strength 10 of the connector bracket 1. Viewed in the insertion direction 28 10, the front guide surface is flush with the surfaces of the guide angles 23. Viewed in the insertion direction 28, the rear guide surfaces are located just before the area of the guide projection 19. The distance of the front guide surfaces of the mounting projections 20 with respect to the rear guide surfaces of the mounting projections 20 15 corresponds to the width of the n-branches of the tie rails 22 of the connector bracket 1. The fastening projections 20 and the guide angles 23, as well as the outer edges of the contact rail steps 36, are recessed downwards in the compression direction 6 and form a plane.

The described shape causes the guide surfaces to guide the external n-branches of the connecting rails 22 of the connector support 1. The mounting surfaces or mounting projections 20 lock into the mounting holes 25 25 of the connector bracket 1 which can be pushed into the plug connector 2, 2 'up to the locking position. The contact rail steps 36 are shaped in the form of an n-arc of the connecting rails 22. In width, they completely cover the inner gaps of the 22 n-branches of the tie rails. Viewed in the insertion direction 28, the guide angles 23 guide the front n-shaped inner hooks 30 of the tie rails 22, i.e. they apply a compressive pressure to them. Viewed in the insertion direction 28, the rear steering or positioning takes place by means of guide grooves 8, to which the guide chamfers 26 engage. Thus, the guide pins 26 of the connector bracket 1 are guided and fastened to the guide grooves 8. The guide grooves 8 keep the U-forks at a predetermined distance.

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The guide projection 19 and the opening 17 are of particular importance when the individual connector support 1 of the connector set 1 supported by the connector is inserted into the opening 4 of the pin connector 2. The opening 17 thus forms a cutting edge 3 with a side perpendicular to the longitudinal axis 12 of the opening 4 5. acts as a counter fastener when cutting the connector bracket 1 from the connection set. The cutting punch 9 cuts into the connecting step 24, acting against the cutting edge 3 10 of the plug connector 2, 2 '. In this case, the guide projection 19 located in the insertion direction 28 opposite the cutting edge 3 acts as a guide element in the insertion direction 28 with the remainder 18 of the step left from the previous connection. The rounded outer surfaces of the U-base act as lateral guides. Separation of the connector brackets 1 in the connection step is particularly advantageous. The separation of the connector brackets 1 takes place chip-free when the connector bracket 1 is placed in the plug connector 2, 2 '. The connection set of the connector brackets 1 is easy to handle. Viewed in the insertion direction 28 20, the front connector bracket 1 can be easily connected to the plug connector 2, 2 'in connection with its connection set of the connector cover 1 and placed in place through the opening 4.

Figures 2 and 4 show a connector bracket 1 connected to the plug connector 2, 25 2 '. The mounting surfaces of the locking projections 20 are locked in the mounting holes 25 of the n-shaped tie rails 22. In this position, the inner surfaces of the n-arcs of the tie rails 22 are in contact with the contact rail step 36. In this position, where the locking spring is not yet in place, the connected parts can be subjected to surface treatment. The locking spring is then mounted in the opening 21 provided for this purpose.

According to the invention, each connecting rail 22 comprises a contact rail step 36 connected to the connector bracket 1 16 95633 connected to the plug connector 2, 2 ', so that in each case an insertion area is formed for the end When the locking spring 14 is placed in the opening 21 provided for this purpose, according to the invention it is provided that each connecting rail 22 is pressed against the edge of the contact rail step 36 facing away from the locking spring 14. This provides a good bond between the connector cover 1 and the contact rail 2, 2 '. The biasing force of the locking spring 14 further affects the ends guided to the insertion areas of the connecting conductors. The location of each end at the edge of the contact rail step 36 as the contact piece 2, 2 'of the contact rail further results in a highly electrically conductive contact or a decrease in the connection resistance. Good electrical contact is also affected by the grooves or openings 30 in each contact rail step 36.

Figure 5 shows in part the technological process of manufacturing the coupling connector 20. It shows the manufacture of the connector bracket 1 and the connection of the connector bracket 1 to the opening 4 of the plug connector 2, 2 '. The connector brackets 1 are pressed and bent in the insertion direction 28 in several successive steps. Seen in the Si-25 rule-pushing direction 28, the front connector bracket 1 is placed on the opening 4 of the plug connector 2. The plug connectors 2, 2 'are inserted 43 in the direction of travel of the plug connectors 2, 2' under the connector bracket 1. The openings of the plug connector 2, 2 'or the steps 36 of the contact rail are then parallel to the connector bracket 1. The cutting edge 3 of the opening 4 is then in front in the insertion direction 28.

On the connector bracket 1 there is a cutting punch 9 in the compression direction 6. When the connector bracket 1 is placed 35 on the opening 4 of the plug connector 2, 2 ', the punch 9 is moved 17 95633 in the compression direction 6. The punch 9 slides in the middle of the U-shaped center portion 11 then against the base surface 7. When the punch 9 is further pressed in the pressing direction 6, shear forces are generated between the cutting edge 3 and 5 of the cutting punch 9 in the connecting step 24 of the connector bracket, which separate the front and thus the connector bracket 1 to be connected in each case. The connector bracket 1 is guided by the cutting punch 9 as described above into the area between the connector bracket 1 and the plug connector 2, 2 'by further penetrating in the compression direction 6. When the inner surfaces of the n-curves of the tie rails 22 reach the upper edge of the contact portion step 36. lock into the mounting holes 25 of the rails 22 of the connector bracket 1 of the connector bracket 1.

Figures 1, 3 and 4 show a lock spring. The lock spring 14 has a structure according to the state of the art (DE-U1-87 04 494.3), so reference will be made here to the related description.

The lock spring 14 consists of parts of the lock spring which are symmetrical to each other and which are connected to each other by means of a connecting piece 34. The connecting piece 34 is located approximately in the middle of the locking spring 14. In the area adjacent to the connecting piece 34 there are fixing holes 38. The fixing holes 38 25 are for fixing the fixing cams 27 located in the connector bracket 1. The resilient ends are located at an angle of about 45 ° to the center of the plane of the connector 34 with respect to the insertion direction 28. Viewed in the insertion direction 28, the front resilient ends have locking tongues 32. The locking tongues 30 have locking ends 35 at the ends of the locking tongues 32. The locking head 35 locks the connection wire inserted into the coupling connector, presses it against the contacting step 36 and prevents the connecting conductor from being pulled out . About half of the width of the locking spring half 35 and in each case half of the middle can be 18 95633 bent in the direction of the fastening holes 38 and thus form fastening strips. The purpose of the fastening strips is to fasten the locking ends 35 of the locking tongues 32 a short distance from the plug connector 2, 2 '.

5 Half of the width of the locking spring half, seen from the center of the locking spring 14, is stamped away along the length of the contact tongues 33 opposite the locking tongues 32. The U-shaped central part 11 of the connector bracket 1 enters the opening 4.

The outer surfaces of the locking tongues 32 and the contact tongues 33 are concave in an area covering about half the width of the connector bracket 1 in the direction of the central part of the locking spring. The edge 45 formed by the outer surface of the lock spring 14 supports the lock spring 14 against the n-branch 15 outside the tie rails 22.

Figures 2 and 4 show a pre-installed connection. The plug connection 2, 2 'is the earth rail of the protective contact socket, i.e. it has a contact pin 2 °. Attached to the pistol connector 2, 2 'is a connector bracket 1, 20 with a locking spring 14. The locking heads 35 and the locking tongues 32 can be kept at a short distance from the edges of the contact rail steps 36 by means of mounting strips. The insertion opening thus formed allows the connecting cable to be easily pushed into the connection terminal. The insertion connecting line 25 is located largely under the influence of the biasing force of the lock spring 14, completely at the steps of the contact rail 36.

Bending the steps 36 of the contact rail and bending the locking projections 20 and the guide angles 30 in the compression direction 6 (stiffening the opening) results in the shape stability of the plug connector 2, 2 'in the area of the weakened cross-sectional surface at the opening 4. In the earth terminal of the protective socket according to the example of Fig. 1, the defined spring pressure 35 of the earthing contact must be kept constant. If said notch or opening 30 were not present, the contact pressure in the two contact pins diametrically opposed to each other on the ground rail 2 would be only one-sided, i.e. only sufficient for the side without the opening 4 but no longer for the opening 4 side edge.

According to the invention, an optimal material can be used in an advantageous manner. The plug connector 2, 2 'and the connector bracket 1 are made of brass plates of different thicknesses and widths. The wall thickness of the plug connector 2, 2 ° (earth-10 pain rail) is 0.9 mm. The wall thickness of the connector bracket 1 is 0.5 mm. In the coupling connector according to the invention, it is thus possible to manufacture the plug connector 2, 2 'separately from the connector support 1 in accordance with the requirements for the mechanical and electrical properties applied to it. As a plant kit, the connector brackets can be easily connected to the respective plug connector 2, 2 ', and they are separated from each other by means of the cutting edge 3 in the opening 4 by inserting the connector bracket 1 into its contact part 2, 2'. The location of the mounting surfaces 52 of the connector bracket 1 on opposite sides of the opening 21 for the locking spring of the steps 36 provides a good connection between the connector bracket 1 and the plug connector 2, 2 'due to the biasing force of the locking spring 14. In this case, an insertion area 25 for the connecting conductor is formed due to the connecting rail 22 in the connector support 1 or the insertion channel forming it, as well as due to the respective steps 36 of the contact part. As a result of this insertion range, the biasing force of the lock spring 14 provides good contact contact contact, i.e. low interface resistance.

Claims (12)

1. Screwless connection terminal for a contact rail (2, 2 '), for example a wall grounding bracket for a wall outlet, said connection terminal having a metallic clamping carrier (1) spaced from one another adjacent each other to receive an insertion channel an insulated end section of a connection conductor, a central part (11) arranged between the insertion channels with a recess 10 (21) for receiving the externally insertable, one-piece clamping spring (14) with two pairs of tongues with two respective consecutive tongues (32, 33), wherein a respective pair of tongs is inserted into an insertion area, characterized in that the contact rail (2, 2 ') has a recess (4) in which the central part (11) of the part separated from the contact rail The clamp carrier (1) formed (2, 2 ') can be set so that each insertion region is formed by a connection piece (36) of the contact rail (2, 2') and that the clamp spring (14) can be inserted for this purpose. in recess (21) in this manner, a clamping carrier (1) and the end section of each connection conductor are held by a pressure against the contact rail (2, 2 ') and against the connection section, respectively. Connection terminal according to claim 1, characterized in that the recess (4) is laterally limited by two in the direction of a longitudinal axis (12) of the contact rail (2, 2 ') opposite to one another (36) arranged for each other. bonding rail has a side face (20) facing away from the clamping spring (14) for respective life surfaces (36) at each bonding rail, one side facing the clamping spring (14) forms a connection section. Connection terminal according to claim 2, characterized in that each bonding rail (22) has a U-shaped cross section for a life (36), the heel surface (52) being formed by the U-shaped cross-sectional surface. 24 95633 Connection terminal according to claim 2 or 3, characterized in that each life (36) has a recess (30) extending in the direction of the longitudinal axis (12). Connection terminal according to any of claims 1-4, characterized in that a substantially perpendicular to the longitudinal axis (12) directed transversely of the recess (4) is formed to a cutting edge (3) for dividing the clamp carriers (1) below the same is inserted into a recess (4). Connection terminal according to any one of claims 3-5, characterized in that the contact rail (2, 2 ') and the clamp carrier (1) are mutually shaped, extending in the direction of the longitudinal shaft (12) and for these designated recesses which engage in each other to hold the clamp carrier (1) against the contact rail (2, 2 *), Connection clamp according to claim 6, characterized in that on the front and / or rear facade surface of the outer leg (25) of each bonding rail (22) a pouring section (25) is formed for a projection (20) adjacent to the life (20). ). Connection terminal according to any of claims 1-7, characterized in that the central part (11) has a U-shaped region in cross-section with two intermediate legs (37) and that a cross-section of the recess (4) shows two notches ( 8) for a guide chamfer (26) of an intermediate leg (37). Connection terminal according to claim 8, characterized in that at the second transverse side of the recess (4), substantially opposite corners (23) are arranged guide corners (23) for placing a section of * an intermediate leg (37). • « 10. A method of producing a terminal block according to any one of claims 1-9, characterized in that the production of a clamp carrier (1) of a metal plaque band (16) takes place by molding and punching, whereby the clamp carrier (1) upon insertion into a recess (4) in a contact rail (2, 2 ') is separated from the metal plate band (16). 11. A method according to claim 10, characterized in that the separation takes place under the influence of a transverse side (4) formed on the cutting edge (3) formed by a cutting edge (3). 12. A method according to claim 10 or 11, characterized by galvanic treatment of the contact rail (2, 2 ') and a clamp carrier (1) inserted therein.