ES2439460T3 - One-piece insulated body connector - Google Patents

Abstract

Connector (10; 110) with a one-piece insulating body (14; 114) and with at least one substantially cylindrical contact insert (12; 112), presenting the contact insert (12; 112) - at a first end a contact segment (18; 118) for electrical connection with a contact piece of the connector (10; 110), shaped in a complementary manner, - at a second end an insertion hole (20; 120) with a central longitudinal axis ( L) to house a conductor, - a clamping device that allows an actuation of the clamping device for the removable or repeatable fixing of the conductor to be housed, from a direction (B) transverse with respect to the central longitudinal axis (L), comprising the clamping device either a clamping screw (16) or a clamping element (156) without a screw, as well as - a connecting segment (22; 122) for the mechanical connection of the contact insert (12; 112) to the body insulator (14; 114), and the body being made or insulator (14, 114) with a housing area to house at least one contact insert (12; 112) and presenting at least one stop (44; 144) to act in conjunction with a retention element (38; 138) arranged in the connecting segment (22; 122) for fixing the contact insert, as well as at least a recess (46; 146) in its receiving area, which is dimensioned such that the clamping screw (16) can be inserted into the recess (46; 146) from outside and that also the screw-free clamping element (156) is accessible from the outside through the recess (46; 146), characterized in that the at least one recess (46; 146) of the insulating body (14; 114) is delimited by two opposite sides by substantially parallel webs (48; 148) one with respect to the other and oriented coaxially with respect to the direction of actuation (B), at least one web (48; 148) having at least one hole (52; 152) which is oriented substantially coaxially with respect to the direction of actuation (B ) and whose shape gives the soul (48, 148) a flexibility with respect to a set screw (16), the degree of flexibility being determined by the shape of the hole (52; 152).

Description

One-piece insulated body connector

5 Next, a connector with a single-piece insulating body for housing contact inserts connected to electrical conductors is described. For this, the insulating body is made with a housing area to accommodate at least one substantially cylindrical contact insert, and the contact insert has at first a contact segment for electrical connection with a connector contact part, Completely shaped, and at a second end it has an insertion hole with a central longitudinal axis to house a conductor, and has a clamping device and a connecting segment for the mechanical attachment of the contact insert to the insulating body. The clamping device is arranged in such a way that an actuation of the clamping device for the removable or repeatable fixing of the conductor to be housed is carried out from a transverse direction with respect to the central longitudinal axis, the clamping device comprising either a Tightening screw or a screw-free tightening element.

15 Electrical connectors of this type are especially used for higher voltages and / or currents (nominal voltage: up to 600 V and higher (approx. 1,000 V), nominal current: up to 16 A and higher (approx. 80 A)) per example for electrical equipment in the construction of machinery, electrical distribution cabinets, light and sound cabling or the like.

In the known connectors, the housing area of the insulating body is adapted to the type of clamping device presented by the contact insert to be inserted. Therefore, the insulating body has a different shape depending on whether the tightening device comprises a tightening screw or a screw-free tightening element. In some known solutions in which the clamping device is made as a screw

25, this is secured in the housing area of the insulating body additionally by another insulating body that is made as a cover. This, for example, fits in, is introduced under pressure, glued or fixed by welding. Another possibility of securing the tightening screw is to introduce it into a single piece insulating body. In this case, the direction from which the screw is screwed into a thread with the help of a screwdriver or other drive tool, is transverse with respect to the central longitudinal axis of the recess of the conductor in the contact insert. However, it is disadvantageous that with the known solutions it is not possible to mount the contact insert with a preassembled tightening screw.

In other known connectors in which the contact inserts have a clamping device comprising a screw-free clamping element, the conductor is introduced from the same side from which the actuator is operated.

35 tightening element with the help of a drive tool. Therefore, the direction of operation substantially coincides with the central longitudinal axis of the insertion hole for the recess of a conductor.

For example, a connector for printed circuit boards is described in DE2809289. The connector features a one-piece block of a dielectric material. A multitude of cameras extends from the rear side to the front side of the block, each chamber housing an electrical contact element respectively. In an exemplary embodiment, a camera can accommodate two contact elements configured in different ways, the contact elements configured in different ways respectively comprising a clamping element in the form of a clamping screw.

45 Objective

Therefore, the invention has the objective of economically making the manufacture of connectors while guaranteeing a reliable connection by electric plug.

Solution

In a connector of the type mentioned at the beginning, this is achieved because the insulating body has at least one stop to act in conjunction with a retaining element arranged in the joint segment for fixing the contact insert, as well as at least one recess. in its housing area, which is sized in such

55 so that the tightening screw can be inserted into the recess from the outside and that the screw-free tightening element is accessible from the outside through the recess. The at least one recess of the insulating body is delimited by two opposite sides by means of souls substantially parallel to each other and oriented coaxially with respect to the direction of operation. At least one core has at least one hole that is oriented substantially coaxially with respect to the direction of operation and whose shape gives the soul flexibility with respect to a clamping screw, the degree of flexibility being determined by the shape of the hole.

Advantages and variants

65 In this way, the contact insert is secured inside the insulating body against its removal in the opposite direction to the direction of insertion, without the need to use more pieces of insulating body such as a cover or the like or having to ensure the Contact insert in a single piece insulating body by means of a tightening screw. The recess in the housing area of the insulating body further guarantees that the insulating body can be used regardless of whether a contact insert with a clamping screw or with a screw-free tightening element is to be housed therein. In this way, a body is provided

5 "universal" insulator (with respect to these two possible embodiments of the clamping device). This is advantageous, especially because in manufacturing the number of manufactured insulating body units is increased, while the lower number of variants is able to lower the storage cost. The contact insert can be inserted into the insulating body regardless of whether the tightening device used comprises a tightening screw or a screw-free tightening element. Since a drive of the clamping device is still possible in the inserted state of the contact insert, both in the case of a clamping screw and in the case of a screw-free clamping element, a conductor can be fixed within the hole of insertion of the contact insert and can be released and rejoined with the clamping device at any time.

In addition, it can be provided that the retention element is made in an elastic manner to allow a movement of the contact insert in an insertion direction and be supported with an active surface in the stop in a direction opposite to the insertion direction with an effect of blocking. The retention element may comprise a retention hook attached entirely to the contact insert. Through the complete construction mode, the number of parts used and, consequently, the assembly times are reduced.

The present invention provides that at least one recess of the insulating body is delimited by two opposite sides by souls substantially parallel to each other and oriented coaxially with respect to the direction of operation. The souls are sized in such a way that on the one hand they do not hinder the actuation of the clamping device by means of a drive tool and, on the other hand, they can touch a screw of

25 tighten that it must be inserted into the recess, by the circumferential surface of its screw head or its screw shank. It may also be provided that the souls are wedge-shaped and that in the direction of actuation they enclose a decreasing free width between the flanks facing each other.

In addition, souls can have two contact surfaces on their flanks facing each other. In addition, the contact surfaces may be concavely shaped in the direction of actuation and increase increasingly.

This embodiment of the insulating body is especially advantageous if the clamping device used for the contact insert comprises a clamping screw. This is screwed from the outside into an internal thread of a threaded hole that is arranged in the contact insert and that is aligned with the recess of the insulating body to act on a conductor located in the insertion hole (if necessary, with the intermediate arrangement of a conductor protector). In this way, the conductor is disposed of vibration proof in the insertion hole and can be tightened with a minimum electrical transition resistance. The surfaces of the souls, concavely curved, can have a radius of curvature that substantially corresponds to the radius of the screw head or screw shank. In this way, a linear contact is established between the concavely shaped contact surfaces and the outer circumferential surface of its screw head or its screw shank and the clamping screw experiences in said area a mechanical resistance that can be a braking (turning) torque or resistance (rotating) torque. This increases when the tightening screw is screwed more deeply. This is achieved by increasing the contact surfaces in the direction of the

45 direction of operation. In this way, a variable tightening or clamping effect is exerted on the screw head or the screw shank, namely increasing, when the tightening screw is inserted into the recess and then inserted into the internal thread of the threaded hole . This mechanical resistance, on the one hand, ensures the additional tightening screw so that it does not loosen or release. On the other hand, the resulting resistance torque can be measured in automated assembly processes of the tightening screw and used as a reference for the screwing depth.

Alternatively, it can also be provided that the contact surfaces do not increase increasingly or increase increasingly in a direction opposite to the direction of operation. In a variant, it can also be provided that the contact surfaces have, for example, a pattern that increases friction. A

Stamping of this type further increases the mechanical strength and, consequently, the securing effect.

In addition, at least one core has at least one hole that is oriented substantially coaxially with respect to the direction of operation and whose shape gives the soul flexibility with respect to the clamping screw, the degree of flexibility being determined by the shape of the hole . The bore of the soul can be sized with different sizes, both in terms of its depth and its diameter. In addition, the drill can have different cross sections, for example, a circular or ellipsoidal cross section.

In addition, it may be provided that the recess is made openly in the opposite direction to the direction of

65 insertion to allow insertion of the contact insert in the insulating body with the pre-assembled clamping device. In this case, the recess has an opening in the opposite direction to the direction of insertion, which is large enough to insert a pre-assembled tightening screw into the contact insert. This especially facilitates the mounting of the connectors, since the contact insert and the pre-assembled clamping device can be inserted as a module in the insulating body.

In a variant of the invention it can be provided that the contact insert present in the insertion zone an inner contact surface for the driver, against which the driver is pressed by the clamping device and that to increase the amount of points The driver's contact with the contact insert has a macroscopic surface structure. The macroscopic surface structure can have, in a sectional view that includes the central longitudinal axis, a profile in the form of saw teeth, whose tips are oriented in the opposite direction to the insertion hole. The saw-shaped profile produces a directed mechanical resistance, similar to a hook, that does not decisively influence the movement of the conductor in one direction (insertion), while hindering the movement in the opposite direction (extraction). This is achieved because the profile with its points opposite to the movement increases the necessary extraction force of the driver.

In addition, the contact insert may have a fitting area in which at least one point of attachment with a shaped drag is arranged to form a cylindrical contact insert. In this way, a cylindrical contact insert can be made from a substantially flat base material if a socket formation, for example a projection, and a corresponding housing formation are provided on two outer edges of the flat base material to be joined. , for example a recess, to realize a union with drag of form. Alternatively, however, it is also possible to join the corresponding outer edges for example by joining materials by welding or the like.

In a variant of the invention it may be provided that the contact insert has at least one support surface for contact with at least one corresponding contact surface within the insulating body. The

The support surface allows, on the one hand, the introduction of the contact insert in exact position in the insulating body and, on the other hand, limits the depth of introduction of the contact insert in the insulating body.

In addition, it may be provided that the contact insert has a conductor guard attached entirely to the contact insert. In a variant of the invention, it can also be provided that the conductor protector protrudes from the contact insert in the area of the insertion hole and that in a curved area it is made with a curvature such that it extends into the interior of the insertion hole. The conductor protector may have a pattern in its curved area that allows a defined elasticity of the conductor protector. A conductor protector is especially advantageous if the clamping device has a clamping screw that, in the absence of a conductor protector, would be in direct contact with the inserted conductor and could damage it.

35 eventually. In conductors currently known, a conductor protector of this type is always made as a separate part that must additionally be inserted into the contact insert and secured. The full realization of the driver's shield makes additional assurance unnecessary without limiting the functionality of the driver's shield.

Alternatively to a tightening screw, the tightening device may comprise a screw-free tightening element in the form of a tightening spring that can be operated by means of a drive tool through a hole disposed in the contact insert. It may be provided that the clamping spring has, in a sectional view that includes the central longitudinal axis, a substantially V-shaped cross-section with two arms that can be moved relative to each other by elastic deformation. In addition, the clamping spring 45 may have a clamping arm to press the conductor against the contact insert as well as a support arm to support the clamping spring in the contact insert. The tightening spring can be inserted as a separate part in the contact insert or be made entirely with the contact insert. In the latter case, the support arm not only rests on the contact insert, but also forms part of the contact insert. The clamping spring can also have a recess for the drive tool on its clamping arm. Said housing can be made, for example, by a recess or / and by a curved area of the tightening arm. With its help, it is possible to easily accommodate a drive tool that can be passed through a recess disposed in the insulating body and through the hole disposed in the contact insert, thereby moving the clamping arm in the direction towards the support arm of the clamping spring. To fix the conductor with the tightening spring, it is first prestressed with the help of the tool

55 drive by moving the tightening arm in the direction of the support arm. Next, the conductor is inserted into the insertion hole to such an extent that - as soon as it is stopped holding a prestress with the drive tool - press the conductor against the contact surface in the area of the insertion hole, fixing it in this way. . In addition, a variant of the invention may provide that the shape of the hole in the contact insert is adapted to the arrangement of the clamping spring within the contact insert, such that it provides at least one stop to support the drive tool. In this way the operation of the drive tool is especially facilitated.

Finally, it can be provided that the contact insert is made to be manufactured from a flat sheet by punching and bending. In this case, the construction of the contact insert is designed in such a way that it can be formed as a whole from a flat plate and formed by forming a cylindrical contact element. This allows a more economical production compared to the procedures of

usual manufacturing with chip removal, such as turning the contact insert, and further reducing the production cost.

More characteristics, properties, advantages and possible variations of the conductor with an insulating body of a single 5 piece result to the expert of the following description in which reference is made to the attached schematic drawings.

Brief description of the figures

Figure 1 shows an isometric view of a connector;

Figure 2 shows the detailed view of a detail II of Figure 1, in which the tightening device of a first contact insert comprises a tightening screw;

Figure 3 shows an isometric view of the first contact insert, made as a female type contact;

Figure 4 shows a front view of an insulating body with a first insulating body, inserted therein, analogously to Figure 3, which is made as a pin-type contact;

Figure 5 shows a sectional view along the line V-V of Figure 4;

Figure 6 shows a detailed view of detail VI of Figure 5;

Figure 7 shows a detailed view of detail VII in Figure 2; Figure 8 shows a detailed view of a detail II of Figure 1, in which the clamping device of a second contact insert comprises a clamping spring;

Figure 9 shows an isometric view of the second contact insert of a connector, made as a pin-type contact;

Figure 10 shows a front view of an insulating body with a second contact insert according to Figure 9, inserted therein;

Figure 11 shows a sectional view along XI-XI in Figure 10; Y

Figure 12 shows a detailed view of a detail XII in Figure 11.

Detailed description of the figures

Figure 1 shows a schematic isometric view of a connector 10. The connector 10 has an insulating body 14 with two rows of electrical contact inserts 12 arranged parallel to each other. It is understood that, depending on the configuration of the connector 10, two, four, six, ten, sixteen, twenty four, thirty two, forty eight or up to two hundred sixteen and more contact inserts can be arranged in two or more rows substantially

45 parallel Figure 2 shows in detail (according to detail II in Figure 1) the typical mounting situation of a first contact insert 12 within an insulating body 14 of the connector 10. In this exemplary embodiment, the contact insert 12 is provided with a tightening device comprising a tightening screw 16. Next, the souls 48 are described in detail in terms of their function and geometry with reference to Figure 7.

Figure 3 shows a schematic perspective view of a first contact insert 12 of a connector 10. The contact insert 12 is substantially cylindrical in shape and comprises at the first end a contact segment 18 for electrical connection to a part of contact formed in a complementary way to the connector 10, and at its second end, an insertion hole 20 with a central longitudinal axis L to accommodate a conductor (not shown). The insertion hole 20 is made as a hollow cylindrical hole, whose central longitudinal axis L is oriented substantially coaxially with respect to the contact segment 18. The contact segment 18 with its ends spaced forms at the first end (the lower one in the Figure 3) of the contact insert 12 a socket, but it can also be made as a plug with a first closed end (see Figure 9). The contact insert 12 also has a connecting segment 22 of substantially square cross-section, formed by bending, which is held together by means of a drag-in connection by means of a fitting area 30 or 130 (see Figure 9). The contact insert 12 is manufactured from a flat material, for example it is punched from a galvanized strip, and is formed by bending at the corresponding points. Instead of using a completely galvanized material, it would also be possible to partially galvanize the material used. This can be arranged in the conductor connection zone 65 as well as in the contact segment 16, either on the outer surface in the case of a contact pin, or on the inner surface in the case of a contact socket . In this way, it is guaranteed that a

good electrical connection of the conductor and connector 10 through the contact insert 12.

In its connecting segment 22 which serves for the mechanical connection of the contact insert 12 with the insulating body 14 (see Figure 2), a hole is provided in the form of a threaded hole 24 (represented approximately

5 in FIG. 3) to accommodate the clamping screw 16. This can be for example a screw, for example with a metric thread, the threaded hole 24 having a corresponding metric internal thread. Alternatively, the clamping screw 16 may also have a self-tapping thread, in which case the filleting process step in the threaded hole 24 of the joining area 22 is suppressed.

The conductor is inserted into the insertion hole 20 along the central longitudinal axis L of the insertion hole 20, from above (with respect to Figure 2), such that the front surface of the insulation in unprepared conductors, or the widening of the cable ferrule is in contact with the upper edge of the insertion hole 20. For fixing, the clamping screw 16 is screwed more into the threaded hole 24 by means of a drive tool (not shown), for example a screwdriver, and presses the conductor against an inner surface of the insertion hole 20 while a conductor shield 26 is inserted. Alternatively, the clamping screw 16 can also press the conductor against the inner surface directly with its screw shank. The conductor protector 26 serves to protect the conductor against possible damage by the tightening screw 16. As can be clearly seen in Figure 3, it is fully connected with the joint surface 22 of the contact insert 12. It protrudes from a upper end 28 of the connecting segment 22 substantially upwards and extends inside the insertion hole 20 in a curved way inwardly by a curvature 32. On its surface oriented in the opposite direction to the insertion hole 20 a pattern 34 is arranged in the area of the curvature 32. This makes possible a defined elasticity of the conductor protector 26 and can be adapted for example in such a way that after tightening and releasing five times the smallest possible cross-section of connection possible, for example 0.5 mm2 without cable ferrule, the largest possible cross-section of connection can be connected, by

25 example 4 mm2 with cable ferrule, without curvature of conductor shield 26.

In the exemplary embodiment shown in Figure 3, the conductor is pressed by the clamping screw 16 and the conductor shield 26 against an inner contact surface A in the area of the insertion hole 20, arranged on the opposite side of the threaded hole 24 in the joint area 22 of the contact insert 12. To increase the number of contact points of the conductor with the contact insert 12, it has a macroscopic surface structure, in this case a profile in the form of saw teeth seen in the longitudinal direction, whose points are oriented in the opposite direction to the insertion hole 20 in the direction towards the first end of the contact insert 12. It is enough with a slight difference between the introduction angle and the exit angle to make this effect possible similar to a hook.

35 For example, the introduction angle can measure more than 50 °, while the exit angle measures for example less than 40 °. In this way, the conductor introduced in the insertion hole is further secured by the clamping force caused by the clamping screw 16 against its unwanted removal of the contact insert 12.

On the outer side of the contact insert 12, in its junction zone 22 two retention elements 38 are made in the form of elastic retention hooks. These are simply punched from the flat base material, with the exception of a clamping core 40, and are folded out. In this way, an active surface 42 is oriented towards the second end of the contact insert 12, which can be supported on a stop 44 arranged in the

45 insulating body 14, blocking in an opposite direction to the direction of insert E. The contact insert 12 is inserted in the insulating body 14 in the direction of insertion E until the active surfaces 42 of the two retaining elements 38 are locked against the stops 44 blocking an extraction movement by their active surfaces 42 engaged with the stops 44. With the help of the retaining elements 38 it is possible to secure the contact insert 12 inside the insulating body 14 of the connector 10 against unwanted removal, no need to use additional insulating bodies.

In the illustrated embodiment, the contact insert 12 rests on corresponding contact surfaces 72 within the insulating body 14, across four bearing surfaces 70. The bearing surfaces 70 are arranged in the substantially square joint segment 22 in curved corners. The

55 contact surfaces 72 in the insulating body 14 are made such that the housing area of the insulating body 14 has a smaller cross-sectional area in the area of the curved corners of the contact insert 12 than the insert of contact 12. Alternatively, at least one bearing surface 70 of the contact insert 12 and a corresponding bearing surface 72 in the insulating body 14 may also be formed in an area other than the curved corners of the contact insert 12.

Figures 4 to 7 show different views and details of the first contact insert 12 inserted in the insulating body 14. In figures 4 and 5 the assembly situation is shown both from the front and in section, while Figure 6 represents a view Details of the mechanical interlocking of the contact insert 12 inside the insulating body 14.

65 As shown in Figures 2 and 4, the insulating body 14 has recesses 46 (see Figure 4) sufficiently

large for inserting a tightening screw 16 or for ensuring access to the tightening screw 16 and therefore an adjustment of the tightening depth of the tightening screw 16 in the threaded hole 24. In addition, each recess 46 is delimited on two opposite sides by souls 48 arranged parallel to each other and coaxially with respect to the direction of drive B. The souls have in an area that in the front view 5 according to figure 4 is arranged at the same height as the screw head 36 cylindrical screw of tightening 16 a thickened segment 50 having a hole 52 arranged substantially centrally. On the two lateral flanks of the souls 48, in said segment 50 (see Figure 4) a contact surface 54 is respectively made which in the present example is concavely made for contact with the circumferential surface of the screw head 36 cylindrical. As a consequence of the contact between the circumferential surface of the screw head 36 and the contact surface 54, the clamping screw 16 experiences mechanical resistance during its introduction into the threaded hole 24. As can also be clearly seen in Figure 7, said contact segment 54 increases increasingly in the direction of actuation A, whereby the resistance also increases in the form of an increasing braking or tightening effect during screwing of the tightening screw 16. This prevents the tightening screw 16 from loosen or release during transport.

Alternatively to this embodiment represented in the figures, however, it is also possible to realize the contact surface A convexly or provide a contact surface 54 of constant size in the direction of operation B. Also, according to the case of application, it may be convenient for the contact surface 54 to increase in a direction opposite to the direction of operation B.

In the embodiment represented in Figure 7, the concavely shaped contact surfaces 54 have a radius of curvature that substantially corresponds to the radius of the screw head 36 and thus produce a linear contact between the screw head 36 and souls 48, so that a greater mechanical resistance results than in the case of a punctual contact, the other parameters remaining unchanged. The mechanical strength can be further increased if the contact surfaces 54 have a pattern that increases friction, as can be seen in Figure 7. This pattern is formed by grooves that extend substantially in a transverse direction with respect to the direction circumferential screw head

36. The holes 52 in the souls 48 can be made as through holes or blind holes of different depths. In this way, it is also possible to influence the normal force acting on the circumferential surface of the screw head 36 and, therefore, the mechanical strength of the clamping screw 16. In addition, the holes 52 may have a circular cross-section or ellipsoidal.

Figures 8 to 12 similarly show a second embodiment of a connector according to the invention that houses a second contact insert within its insulating body. For greater ease, the same reference signs are used as in Figures 1 to 6, with the figure "1" before it.

35 A decisive difference with respect to the first embodiment represented with the aid of Figures 1 to 7 is that the clamping device of the second contact insert 112 comprises a screw-free clamping element instead of a clamping screw . In addition, the second contact insert 112 has in its junction zone 122 a hole 166 for actuating the clamping element through said hole 166.

In the present embodiment of the contact insert 112 (see Figure 9), said screw-free clamping element 156 is formed by a tightening spring 156 completely accommodated in the contact insert and formed substantially V-shaped with two arms 158, 160. The upper edge (in Figure 9) of the clamping spring 156 which in cross section describes the tip of the V on which the two arms 158, 160 are touched, is extended in the present example to along an upper end edge 128 and oriented towards the second end (the upper one in figure 9) of the contact insert 112. Unlike the first embodiment with a clamping screw 16, in the second embodiment, the direction of action of the clamping spring 156 does not coincide with the direction of actuation B. Therefore, the inner contact surface A is also not arranged in front of the hole 166, but in front of one of the arms of the spring of a press 156, the clamping arm 158. The support arm 160 of the clamping spring 156 rests with its surface opposite the clamping arm 158 on an inner surface of the connecting surface 122, while the clamping arm 158 protrudes transversely of the support arm 160 towards the contact surface 54 pressing against it. At its opposite end to the second end of the contact insert 112, the clamping arm 158 has a curved segment 162 such that it is substantially J-shaped. The curved segment 162 which in the case of a "J" is

55 oriented to the left is disposed oriented towards the support arm. In addition, in the curved segment 162 a tool housing recess 164 is provided, for example in the form of an elongated opening, as shown. Both the bending segment 162 and the tool housing recess 164 serve to house a drive tool (not shown), with the aid of which the clamping arm 158 can move towards the support arm 160. The clamping element 156 it may be interlocked, welded, glued or fixed in a manner similar to the connecting segment 122.

In order to guarantee access to the curved area 162 and to the tool housing recess 164 in the curved segment 162 by means of a drive tool, the hole 166 comparable to the threaded hole 24 is arranged in the connecting segment 122 of the contact insert 112. The first embodiment. 65 As shown in Figure 7, the shape of the latter can be adapted to the outer contour of the clamping spring 156, in this case to the V-shape of the clamping spring 156. In this way it is guaranteed that in the

less a zone there is a stop for the drive tool.

In Figure 9, the contact segment 118 of the contact insert 112 is made in the form of a pin, the lower ends facing the first end of the contact insert being curved towards each other.

5 112. At the first end of the contact insert 112 a substantially cuneiform pin tip 168 is made, whereby the penetration of the pin-shaped contact insert into a complementary socket is simplified.

Figures 9 to 12 also show similarly to Figures 3 to 6 different details of the connector 110 according to the invention with the contact insert 112 plugged in.

Claims (11)

1. Connector (10; 110) with an insulating body (14; 114) in one piece and with at least one contact insert (12; 112) substantially cylindrical, presenting the contact insert (12; 112) 5

-

 at a first end a contact segment (18; 118) for the electrical connection with a contact piece of the connector (10; 110), formed in a complementary manner,

-

 at a second end an insertion hole (20; 120) with a central longitudinal axis (L) to accommodate a conductor,

-

 a clamping device that allows a drive of the clamping device for the removable or repeatable fixing of the conductor to be housed, from a transverse direction (B) with respect to the central longitudinal axis (L), the clamping device comprising or a clamping screw (16) or a screw-free clamping element (156), as well as

-

 a connecting segment (22; 122) for the mechanical attachment of the contact insert (12; 112) to the insulating body 15 (14; 114),

and the insulating body (14, 114) being made with a housing area to accommodate at least one contact insert (12; 112) and presenting at least one stop (44; 144) to act in conjunction with a retaining element ( 38; 138) arranged in the connecting segment (22; 122) for fixing the contact insert, as well as at least one recess (46; 146) in its housing area, which is sized such that the screw of Tightening (16) can be introduced into the recess (46; 146) from the outside and also that the screw-free tightening element (156) is accessible from the outside through the recess (46; 146), characterized in that the at least a recess (46; 146) of the insulating body (14; 114) is delimited by two opposite sides by means of souls (48; 148) substantially parallel to each other and coaxially oriented 25 with respect to the direction of drive (B), having at least one core (48; 148) at least one hole (52; 152) that is oriented substantially coaxially with respect to the direction of drive (B) and whose shape confers to the core (48, 148) a flexibility with respect to a clamping screw (16), the degree of flexibility being determined by the shape of the hole (52; 152). 2. Connector (10; 110) according to claim 1, characterized in that the retaining element (38; 138) is elastically formed to allow a movement of the contact insert (12; 112) in a direction of insertion (E) and rest with an active surface (42; 142) on the stop (44; 144) with a blocking effect in the opposite direction to the direction of insertion (E).

3. Connector (10; 110) according to claim 1 or 2, characterized in that the retaining element (38; 138) comprises an elastic retention hook, preferably integrally attached to the contact insert (12; 112).

4. Connector (10; 110) according to one of claims 1 to 3, wherein the souls (48; 148) have, on the flanks facing each other, respectively a contact surface (54; 154) for a head of screw of the tightening screw (16), the contact surfaces (54; 154) being preferably concavely shaped increasing increasing in the direction of operation (B), and preferably presenting the contact surfaces (54; 154) a pattern .

A connector (10; 110) according to one of claims 1 to 4, wherein the holes (52; 152) have in the souls (48; 148) a circular or ellipsoidal cross section.

6.

 Connector (10; 110) according to one of the preceding claims, characterized in that the recess (46; 146) is openly made in the opposite direction to the direction of insertion (E) to allow insertion of the contact insert (12; 112 ) on the insulating body (14; 114) with the preassembled clamping device.

7.

 Connector (10; 110) according to one of the preceding claims, characterized in that the contact insert (12; 112) has an inner contact surface (A) for the conductor in the area of the insertion hole (20; 120), against which the driver is pressed by the clamping device and to increase the

The number of contact points of the conductor with the contact insert (12; 112) has a macroscopic surface structure, presenting the macroscopic surface structure, in a sectional view that includes the central longitudinal axis (L), preferably a shaped profile of saw teeth, whose tips are oriented in the opposite direction to the insertion hole (20; 120).

8.

 Connector (10; 110) according to one of the preceding claims, characterized in that the contact insert (12; 112) has an engaging area (30; 130) in which at least one connection point is provided with a drag to form the cylindrical contact insert (12; 112).

9.

 Connector (10; 110) according to one of the preceding claims, wherein the contact insert (12) presents the

65 minus a bearing surface (70; 170) for contacting at least one corresponding contact surface (72; 172) within the insulating body (14; 114). 10. Connector (10; 110) according to one of the preceding claims, wherein the contact insert (12) has a conductor shield (26) fully attached to the contact insert (12). 11. Connector (10; 110) according to claim 10, wherein the conductor protector (26) protrudes from the contact insert (12) in the area of the insertion hole (20) and in its curved area is made with a curvature (32) such that it extends into the insertion hole (20), and preferably the conductor protector (26) has a pattern (34) in its curved area that allows a defined elasticity of the conductor protector (26) . 12. Connector (110) according to one of the preceding claims, characterized in that the clamping element (156) screw-free comprises a clamping spring that can be operated by means of a drive tool through a hole (166) disposed in the contact insert (112), preferably presenting the clamping spring (156) in a view in section that includes the central longitudinal axis (L), a substantially V-shaped cross section with two arms (158; 160) that can be moved relative to each other by 15 elastic deformation. 13. Connector (110) according to claim 12, wherein the clamping spring (156) has a clamping arm (158) to press the conductor against the contact insert (112), as well as a support arm (160) to support the clamping spring (156) in the contact insert (112), the clamping spring (156) preferably presenting on its clamping arm (158) a recess (162; 164) for the drive tool. 14. Connector (110) according to one of claims 11 or 12, characterized in that the shape of the hole (166) in the contact insert (112) is adapted to the arrangement of the clamping spring (156) within the contact insert (112), such that it provides at least one stop to support the drive tool. 15. Connector (10; 110) according to one of the preceding claims, characterized in that the contact insert (12; 112) is made from a flat sheet by punching and bending.