KR101174159B1 - Connecting device for direct plug-in connecting the conductor ends and electric appliance with such a connecting device - Google Patents

Abstract

Device has a V-shaped leaf spring (4), and a bus bar (3) with a U-shaped trough (9). A conductor is guided into the trough in a direction perpendicular to a longitudinal blade of the trough. A contact point is arranged between a free end of a contact tongue of the spring and a lug of the bus bar, such that the conductor end is inserted into the contact point by an open end of the trough.

Description

CONNECTING DEVICE FOR DIRECT PLUG-IN CONNECTING THE CONDUCTOR ENDS AND ELECTRIC APPLIANCE WITH SUCH A CONNECTING DEVICE}

1 is a perspective view of a first connection device in a non-wired state.

2 is a cross-sectional view of the connecting device according to FIG. 1 in a non-wired state;

3 is a cross-sectional view of the connecting device according to FIG. 1 in a connected state.

4 a perspective view of a leaf spring for the connecting device according to FIG. 1;

5 a perspective view of the contact rail for the connection device according to FIG. 1;

6 is a perspective view of a connecting device with a plurality of fasteners and leaf springs on a common contact rail;

FIG. 7 shows a further perspective view of the connecting device according to FIG. 6 with only partially shown contact rails.

8 shows a perspective view of a part of the stationary housing with the connection device according to FIG. 1 in an unwired state;

9 shows a schematic view of the fixed housing with the connection device according to FIG. 8 in a connected state;

10 is a schematic diagram illustrating a further connection device designed as a printed circuit board terminal.

FIG. 11 is a schematic diagram showing an additional connection device connected with a ground terminal for a support rail; FIG.

12 is a perspective view of an additional connection device in an unwired state, showing an alternative first way of securing the leaf spring to a trough;

FIG. 13 is a sectional view of the connecting device according to FIG. 12 in a non-connected state; FIG.

FIG. 14 is a perspective view of an additional connection device in an unwired state, showing an alternative additional way of securing the leaf spring to the rolling head; FIG.

15 is a cross-sectional view of the connecting device according to FIG. 14 in a non-wired state.

16 is a perspective view of a rolled contact rail having a lock.

17 is a perspective view of an additional connection device in an unwired state, including a leaf spring in the shape of a loop.

18 to 20 show various views of a further connection device according to the invention.

Explanation of symbols on the main parts of the drawings

1: connecting device 2: conductor end

3, 38: contact rail 4, 53: leaf spring

5: fixed position 6, 7: spring leg

8: metal sheet 9: rolling

10, 14, 15, 42, 43: flap

delete

12, 13: longitudinal legs 18, 22: contact rail attachment

20, 21: contact protrusion 23: perforation

24: plug 25: insulator housing

26: printed circuit board 27: curved portion

28: flat part 29a, 29b: peck

30, 31, 36, 37: opening 32: screwdriver

33: soldering leg 34: bore

35: outer housing 39: base leg

40: protrusion 45: attachment

46: Home 58: Loop

59: fixed leg 60: perforation

61: fixed edge 62: support edge

63: stamping portion 65: end region

67: stairs 68: wall

The present invention relates to a connection device according to the preamble of claim 1 and to an electric appliance having a connection device of this type.

In the field of direct connection engineering, connecting terminals for single-wire or multi-wire conductors have long been known, in the case of said connecting terminals inside a contact rail having one recess and one collar On the one hand, a plate spring is coupled, which is assembly-friendly on the one hand, but on the other hand, with such a configuration, a very large force is applied from the plate spring to the corresponding support when inserting and contacting the conductor. It must be transferred directly to the element of the insulator housing which is used as. German patent application DE 28 25 291 C1 and European patent application EP 1 391 965 A1 show such prior art.

Compared with the prior art as known in the foregoing publications, it is an object of the present invention to provide a connection device which can be manufactured as simply as possible in the art of direct connection engineering and which is reliable. In addition, the contact rails must also enable high current, particularly safe current conduction.

The present invention achieves the above object by the subject matter of claim 1.

The contact rail according to claim 1, wherein the contact rail forms a groove-shaped U-shaped roll with one base leg and two longitudinal legs, the leaf spring having a conductor inside the roll perpendicular to the base leg of the roll from one direction. It is arranged and formed so that it can be inserted into.

The connection terminals provide a high degree of functional safety at minimal cost and can be simply wired and disconnected.

The field of use of such a connecting device is hardly limited because the connecting device is suitable for all kinds of electric appliances such as series terminals or contactors.

A very unique advantage compared to the solution, in which the conductor is configured to be inserted parallel to the base leg of the conductor, into the free end of the roll along the axis, the connection device having a plurality of fastening parts can be implemented very simply by the present invention. Is there. Such an implementation is such that, in a single rolled contact rail, they are mutually displaced in the longitudinal extension direction of the contact rail, so that a plurality of leaf springs are inserted into the roll in a state arranged in the same direction and / or in the opposite direction, This is achieved by the formation of a plurality of fixing parts on only one contact rail.

Particularly preferred is that not only the leaf springs but also the contact rails can be simply constructed and inexpensively manufactured from sheet blanks as stamped / curved parts.

The connecting device can also be connected to the conductor end without a tool from one side, but otherwise the conductor cannot be removed from the terminal again against the spring action without the tool. The rolled contact rails can also safely pass larger currents, since at each fixing part a conductor cross section of sufficient size is formed in at least one wall of the roll, which formation is of particular great advantage. Becomes The U-shaped contact rail has two side walls, unlike other structures, but these two side walls can be designed to be quite long and narrow because the structure of such a contact rail is particularly stable. Surprisingly, therefore, despite the two sidewalls described above, even though they are configured to be very thin and long relative to the conductor width, the larger critical currents or powers without the individual critical locations being overheated as in the prior art known at the time It is possible to implement a series terminal having a connection terminal which is also suitable for transmitting and especially a connection terminal of the above type.

According to a first preferred variant, which has a small overall width and minimal manufacturing cost, the leaf spring has a U or V shape with two longitudinal legs connected to each other via one bend, in which case the plate The springs are arranged and aligned such that the free ends of the two spring legs are coupled inside the roll, and the bends or peaks project upward from the roll at the open side facing away from the roll's base leg.

Thus, the contact rails that surround the leaf springs, preferably in cage form, absorb the power important for the connection and disconnection processes.

Alternatively, the leaf spring can have a closed loop form with two longitudinal legs. Thus, the spring itself actually absorbs the power acting on the spring upon insertion.

Variations of the two embodiments are described below and in the dependent claims.

Preferably, the leaf spring is supported in a simple manner only on the first spring leg of the spring in the contact rail, in particular only on the sidewall of the roll, and the contact rail as a stamped / curved part molded from a highly conductive metal sheet. Is formed.

The connection of the leaf spring (s) is one flap exposed from the rolled base leg with two longitudinal legs, aligned parallel to the base leg from the rolled base leg, or vertically up or Z-shaped. Can be implemented in a simple manner, with the result that a first through-hole in the form of a window is formed in the precursor base leg, in which case the first spring leg is supported directly on the flap or on / within the flap. Is supported.

Additionally, in order to support the leaf springs, in areas where the first spring leg projects upward from the roll at each of the free ends of the longitudinal leg of the roll, flaps bend inward from the contact rail into the leaf spring on the perforations, It is preferred that the flaps are engaged inside the corresponding through holes in the first spring leg, the flaps being further supported and fixed on the contact rail.

In order to form the fixing part, a second spring leg having a free end formed at an angle with respect to the base leg of the roll extends obliquely into the roll, in which the free end of the second spring leg is attached to the contact rail attachment. Adjacent the contact rail attachment is integrally coupled with the precursor.

At the free axial end of the contact rail, the contact rail attachment is bent inward in the inner direction of the roll from one of the two longitudinal legs of the U-shaped roll.

Alternatively, between the free axial ends of the contact rails, the contact rail attachment is preferably exposed in multiple directions from the base leg of the roll and bent upwards from the base leg of the roll.

Preferably, the rolled base leg comprises an additional cut-out used to receive or penetrate the conductor end, in the same manner as above or by any other free drilling method between the leaf spring and the contact rail attachment under the anchor. .

By means of the invention, electrical appliances with one or more connection devices according to the invention, in particular series terminals, printed circuit boards, contactors and the like can also be realized.

Further preferred embodiments may be cited in the remaining dependent claims.

The invention is described in detail below with reference to the drawings with reference to the embodiments.

1 shows a first embodiment of a connecting device 1 which enables the connection of stripped conductor ends 2 in a so-called toolless direct connection method (FIG. 3).

The connecting device comprises a contact rail 3 formed of a rolling element 9, inside the rolling element which acts on the conductor end 2 as a spring and for fixing the conductor end 2 to the contact rail 3. A shaped leaf spring 4 is arranged, which is designed such that the conductor end 2 can be inserted directly into the fixed position 5 between the leaf spring 4 and the contact rail without tools.

The V-shaped leaf spring 4 (see FIG. 2) bent from the strip blank sheet blank has a first spring leg 6 aligned perpendicularly to the base leg of the U-shaped roll 9 and the first leg. Viewed at an angle of preferably 30 to 60 ° with respect to the second spring leg 7, ie the first spring leg 7, which is aligned at an angle with respect to and connected with the first spring leg 6 via the bend. Includes contact legs aligned at an angle of approximately 45 °.

Thus, the free ends of the two spring legs 6, 7 are directed towards the base legs of the base of the tread 9, and the bend 27 or peak connecting the two spring legs 6, 7 is tumbled. Protrude upward from (9).

The first spring leg 6 of the leaf spring 4 is supported inside the contact rail 3 formed as a stamped / bent part from a metal sheet having excellent conductivity.

In order to manufacture the contact rail 3, the substantially rectangular metal sheet 8 is first bent into a U-shape or groove shape, whereby the two longitudinal legs 12, 13 of the roll 9 and the longitudinal legs A base leg 39 is formed that is perpendicular to the. The U-shaped flap 10 is then exposed from three sides from the base leg 39 of the roll 9 and bent upwards by about 90 ° from the base of the roll, thereby forming a window within the roll of the base leg 39. A through hole 11 is formed.

Then, the free end of the first spring leg 6 is at least supported by the flap 10 and in some cases fixedly complementary (eg by attachment and / or embossing), whereby the first spring leg 6 protrudes from the roll vertically upward from the roll base leg 39.

By the width of the roll 9 actually coinciding with the width of the leaf spring 4, the leaf spring forms a free U-shaped cross section inside the roll 9, from one longitudinal leg 12 to another. Extends to (13). It is also conceivable that the leaf springs are slightly wider than the rolls-with a slight expansion of the roll 9 at insertion-and fixedly placed inside the rolls.

One side of the first spring leg 6 is supported on the flap 10 at the side facing away from the second spring leg 7. The width of the roll 9 actually corresponds to the width of the spring leg. The other spring leg 7 is supported by the contact rail attachment 18, whereby the spring is fixed in a fixed assembly manner within the rolling element 9.

At the free ends of the longitudinal legs 12, 13 of the two longitudinal legs 12, 13 of the rolling element 9, in the perforations in which the first spring legs 6 respectively project from the rolling elements, Flaps 14, 15 which engage inside corresponding holes (eg rounded perforations) in the first spring leg 6 are bent inward from the contact rails. As a result, the first spring leg 6 becomes stable and is supported and fixed inside the rolling head.

The free end of the second spring leg 7, which is formed at an angle with respect to the base leg 39 of the roll, extends obliquely in the base direction of the roll 9. The second spring leg is formed as a contact rail attachment formed as an attachment of the one longitudinal leg 12 which is bent inwardly at right angles in the direction of the inside of the roll from one of the two longitudinal legs of the U-shaped roll 9. Adjacent to 18.

In this manner, a fixing position 5 is formed between the free end of the second spring leg 7 and the contact rail attachment 18, and inside the fixing portion the conductor end 2 is formed from the open side of the roll. ) Can be inserted by direct connection engineering without tools. Additional recesses 19 (FIG. 3) formed by bending additional contact rail attachments 22 from the base legs 39 of the contact rails and bending into a planar region below one longitudinal leg Since it is provided in the base leg 39 of the contact rail 3 below the fixing position 5, the conductor end 2 can be inserted into the fixing part beyond the base leg 39 of the rolling element 9 and Inside the fixing part, the conductor end is in contact with the two contact protrusions 20, 21 (boss) (FIG. 3) in the contact rail attachment 18. The contact rail attachment 18 has a protrusion over the one contact protrusion.

As described above, connection devices, which can be contacted without tools in a simple manner by very simple means, are embodied in direct connection engineering technology, in particular the rolling contact rails 3 actually absorb the full power in the fixed position 5. And, due to its structure, also has a sufficiently large conductivity, the connection device is characterized by a simple configuration and is very functionally safe.

The free ends of the contact legs 7 of the leaf springs 4 are pressed in such a way that they are properly pressed into the contact rails in the state that one conductor is connected and that the withdrawal from the fixing part to the outside is prevented by means of automatic locking. Formed and disposed (flat portion 28; FIG. 4).

By means of a correspondingly longer contact rail 3 on the base of the connecting device 1, a plurality of terminals can also be realized in a single rolled contact rail 3. For this purpose, the leaf springs 4 are arranged in a number of places axially mutually displaced inside the elongated contact rails 3 which are likewise rolled.

Thus, on the one hand, it is possible to form one connecting device 1 according to the scheme of FIG. 1, respectively, at the two free ends of the rolling contact rail, in this case the contact legs of the two leaf springs 4. (7) is oriented in a large direction. 11 shows such an arrangement.

In addition, an additional leaf spring 4 can be further arranged between the two end side leaf springs 4, in which case the first spring leg 6 of the further leaf spring 4 1 is fixed to the contact rail, in which case the contact rail attachment 18 in the fixture is exposed at each of the three sides of the base leg 39 of the roll 9 so that the base of the roll 9 is exposed. Actually bent vertically upward.

In this way, any number of terminals can be arranged in the same direction and / or in the opposite direction on the connecting device 1.

An optional perforation 23 in the contact rail can be used for the plug 24 or the test tab of the transverse connection device (FIGS. 6 and 7).

The contact rails 3 can be a wide variety of types of electrical appliances, in particular series terminals or contacts (not shown in the figure) or similar devices having an insulator housing 25 (see FIGS. 8 and 9) ( See FIG. 10).

For example, forming a stop limit (peg 29b) for leaf springs and screwdrivers upon disassembly, or for supporting the spring corresponding support (segment 6 in the slot between itself and the additional pin 29c of the insulator housing). In order to form the pins 29a for fixing the pins 29, the pegs 29a and 29b may be coupled between the contact rail legs inside the insulator housing 25.

In order to be able to insert the conductors (Figs. 8 and 9) into the fixing part without tools, a first opening 30 is formed on the fixing part inside the insulation housing, for example using a screwdriver 32 In order to release the conductor end 2 in the fastening portion by pressing down the contact leg 7 of the leaf spring 4 through the second opening 31, the second opening 31 on the side of the fastening portion above the contact leg. Is formed, the conductor can be pulled out of the insulator housing 25.

FIG. 10 shows a variant in which the contact rail 3 has, for example, two soldering legs 33 formed integrally with the contact rail 3, the soldering legs being a printed circuit board. By being inserted into the bore 34 of 26, the connection device can also be used on a printed circuit board. The outer housing 35 with openings 36 and 37 for connection and disconnection can be mounted on the printed circuit board 26 via a connection device.

Finally, FIG. 11 shows that the contact rail of the additional connecting device 1 has two fixing parts and a leaf spring 4, which can be used for contacting the support rail directly or via a contact spring or the like. One variant is shown in which a rail 38 is formed or attached to the contact rail 3. In this way, PE-connections can be implemented, for example, by simple means.

12 and 13 show a first variant to FIG. 1, in which case the end region of the first spring leg 6, which is coupled to the inside of the roll 9, has a window-shaped aperture 41. A flap 42 bent in a Z shape extends into the through hole, and the flap is exposed from the base leg 39 of the roll and bent to the outside. Thus, the spring is supported on the flap 42 on the one hand and on the contact rail attachment 18 on the other by the second spring leg.

The flaps 14, 15 which likewise bent inward from the contact rail and which are simply used as corresponding supports for the contact rail or which are engaged inside the corresponding recesses 16, 17 in the first spring leg 6 are likewise. It can be provided complementarily. It is also conceivable to exclude the flaps 14 and 15 in this modification, since the Z-shaped flaps already provide a safety function that prevents the spring from being pulled out. Further support action takes place at the contact rail attachment 18. Thereby, the first spring leg 6 is again stably fixed in the rolling head very simply.

FIG. 14 shows a further variant to FIG. 1, in which the first spring leg 6 is provided with a through hole 44 which is again arranged at the height of the base of the roll, so that the first spring leg is It protrudes downward or outward from the base leg 39 of the rolling element 9. The flap 43 again extends into the aperture, or in this case a section of the base leg 39 of the roll 9. However, one section of the base leg 39 of the rolling element 9 does not bend itself, but rather is cut freely on three sides of the base leg 39 of the rolling element 9 so that the first spring leg 6 The through hole 44 slides over the flap 43 in the plane of the base leg 39 of the roll 9. The spring is thereby supported on the flap 43 on the one hand and again on the contact rail on the other hand. The flaps 14, 15 bent inwardly from the contact rails can likewise be provided complementarily or-as shown-can be omitted. In any case, the leaf spring 4 is simply fixed stably inside the rolling head.

FIG. 16 shows a state in which the contact rail attachment 18 is bent from the longitudinal leg 12 and extends to another longitudinal leg, in which case the correspondence of the attachment 45 and the contact rail or of the corresponding longitudinal leg is shown. The grooves 46 are coupled to each other in the form of a lock, so that a stable cage or frame is formed in this manner, so that the leaf spring can be securely supported on the cage or frame.

FIG. 17 shows a perspective view of an additional connection device in an unwired state, including a leaf spring 53 in the shape of a loop. On the rolling element 9-in this case on the open side-a leaf spring 53 is arranged to fix the conductor end to the contact rail attachment 18, which plate end has a leaf spring without an actuating tool. It is designed to be inserted directly into the fixing part 55 between the (4) and the contact rail attachment 18.

The leaf spring 53 includes a first spring leg 56 with a through hole 57 in the form of a window. In the said 1st spring leg 56 provided with the through-hole 57 of the window form, a fixed spring is arrange | positioned as a contact rail on the rolling mill 9. The fixing spring is then raised on the edge of the longitudinal legs 12, 13 at the open side of the rolling element 9, in which case the fixing spring is provided by the protrusion 40 of the contact rail attachment 18. The protrusion is bent by itself to ensure that the looped leaf spring 53 is secured to the area of the fixing part 55 without being pulled out of the roll.

In this way, the spring legs 56 of the leaf springs are aligned parallel to the contact rails, raised flat on the roll and / or fixed to the roll. The leaf spring then forms a closed loop 58, in which case the leaf spring extends backwards into the window-shaped through hole 57 in the loop 58 outside the roll 9 and free restoring legs. (59)-This fixed leg has only the width of the through hole-penetrates the through hole. The free anchoring leg 59 pushes the conductor end towards the contact rail attachment 18.

The loop 58 has an elongate shape and is actually inclined in the conductor insertion direction, in particular the angle α between the fixing leg and the conductor insertion direction L-in this case vertically from above-45 °. To be smaller, in particular smaller than 30 °.

Surprisingly, the plate- and stationary spring 53 has a structure that reminds of the structure of the so-called tension spring connection. However, the plate- and stationary spring 53 is arranged and designed such that the conductor can be inserted into the stationary part without the tool from the opposite side of the loop 58. In this case, the very unique advantage of the fixing spring 53 is that the spring enables direct insertion connection operation on the one hand, because the conductor can be inserted into the fixing spring without any difficulty, but the fixing portion This is because it is not easy to pull out again toward the edge in the area (55). For this purpose the user would rather need a tool. Furthermore, the fixed spring on the other hand offers the advantage of a closed system, that is, the fixed spring 53 itself absorbs the total power between the conductor end and the fixed spring 53. It is only necessary that the spring leg 56 is secured to the contact rail or roll 9 by a through hole 57.

A further particularly preferred embodiment of the invention is shown in FIGS. 18 to 20.

The connecting device shown in the figures also includes a contact rail 3 formed of a rolling element 9, in which a V-shaped leaf spring 4 is arranged.

The V-shaped leaf spring 4 also includes a first spring leg 6 that is bent from a strip-shaped sheet cut and aligned perpendicularly to the base leg of the U-shaped roll 9, And a second spring leg 7, ie a contact leg, which is aligned at right angles to the first spring leg and connected to the first spring leg 6 via a bend. In addition, the free ends of the two spring legs 6, 7 also face towards the base leg of the base of the rolling element 9, and the bend 27 or peak connecting the two spring legs 6, 7 is It protrudes upward from the roll 9.

As in FIG. 1, the first spring leg 6 of the leaf spring 4 is also fixed inside the contact rail 3. Inside the rolled base leg 39 is also formed a window opening-which is indicated by reference numeral 11. By means of the recess 19, the conductor can be inserted through the base 39 of the head 9. A wall 68 is formed at the base of the roll 9 between the through hole 11 and the recess 19.

The width of the leaf spring in the bend region actually corresponds to the width of the roll 9. In other words, the entire installation space provided is best utilized in this area. This can be seen in particular in the installation shown in FIG. 20. The leaf spring 4 narrows only in the region where it is coupled to the roll, and later in the region of the legs 6, 7 of the leaf spring actually narrows to the inner width of the roll 9. As the width of the roll 9 actually corresponds to the width of the leaf spring 4, the leaf spring forms a free U-shaped cross section within the roll 9, from one longitudinal leg 12 to another. Extend to (13). Thus, the overall width of the fixing legs is also used to insert the conductors with the diameter corresponding to the maximum width. In this case, the conductor is securely fixed to the side wall of the roll 9 so as not to fall out.

The fixing leg 7 is again adjacent to the contact rail attachment 18, which has a fixed edge 61 for optimizing contact with the perforations 60, in which case the conductor contact is optimized. .

In the region where the first spring legs 6 are respectively engaged inside the roll at the free ends of the two longitudinal legs 12, 13 of the roll 9, the flaps 14, 15 on the perforation are inward from the contact rail. (Only one of the two flaps can be seen in FIG. 18).

The flaps 14, 15 are each connected to a slot 66, and inside the slots the springs 4 are coupled to the edge regions with full width in the region, so that the leaf springs 4 are in this embodiment. In fact it is fixed and supported in the area of the slot 66. Almost full power is maintained in this area when the conductor is inserted. In this case the inwardly bent flaps 14 and 15 act reliably and complementarily secure and support the contact rail attachment 18 of the next connection axially connected inside the roll in a preferred multiple function (FIG. 19). . In addition, the area protruding from the precursor of the contact rail attachment 18 is also supported inside the insulator housing, for example in a series fixed housing with a supporting edge 62-FIG. 19.

Impressed part 63 in the longitudinal legs 12, 13 or sidewalls of the head 9, which are coupled inside a corresponding side recess 64 in one leg of the leaf spring 4. ) Prevents the leaf spring from inadvertently falling up from the roll 9. The elongated lower end region 65 of the leaf spring 4, which is engaged inside the lower opening of the base leg of the rolling element 9 and preferably does not protrude above the lower edge of the base leg, has a leaf spring 4. The leaf spring (4) around the support region of the leaf spring (4) in the slot 66 of the longitudinal side walls (12, 13) or the side walls of the precursor that are securely supported and maintain the power acting upon insertion of the conductor This further prevents inadvertent rotation.

Since there are two wide sidewalls, the situation at the base 39 of the precursor 9 is non-critical, unlike in other structures having passages at the base of the precursor, for example. The sidewalls or longitudinal legs 12, 13 continue to ensure sufficient current carrying capability, nevertheless responsible for the fixing function and the safety function to prevent drawing out. However, these functions raise some constraints with respect to the shape of the longitudinal leg. However, such forced conditions are non-critical because otherwise a sufficient cross section is provided by the longitudinal legs 12, 13.

The last thing to mention is that one leg of the leaf spring 4, for example leg 6, comprises one stairway 67 which greatly simplifies the assembly process with an automatic machine tool. The reason is that the steps form a distinction between the correspondingly formed legs 6, 7-the fixing legs and the supporting legs-and in addition the distinguishing characteristics which facilitate the alignment of the leaf spring 4 during assembly.

The present invention makes it possible to provide a connection device which can be manufactured as simply as possible in the field of direct connection engineering technology and is reliable.

Claims (30)

a) one or more leaf springs (4, 53) acting on the conductor ends as compression springs for securing the stripped conductor ends (2) to the contact rails (3); b) the leaf springs 4, 53 are designed such that the conductor end 2 can be inserted directly into the fixed position 5 without any actuating device and without the use of a tool, In the connecting device 1 for connecting the stripped conductor end 2, c) the contact rail forms a groove-shaped U-shaped trough 9 having one base leg 39 and two longitudinal legs 12, 13, d) The leaf springs 4, 53 are arranged and formed so that the conductor can be inserted into the roll 9 from a direction perpendicular to the base leg 39 of the roll 9, and the leaf spring The free ends of the first and second spring legs 6 and 7 of the second spring leg 7 are coupled to the inside of the roll, for which the bend 27 or peak of the leaf spring is the base leg 39 of the roll 9. The leaf spring is disposed and oriented in the roll, or the leaf spring comprises a first spring leg 56 so as to project up from the roll 9 at an open side facing away from the roll spring, the first spring The leg has a through-hole 57 in the form of a window and is raised on the edges of the longitudinal legs 12, 13 so that the free-standing leg 59 penetrates, drawing an arc from the first spring leg. Looping up to through-hole (57) in the form of a window Extension, c) a plurality of leaf springs in the roll 9 are arranged on one roll-shaped contact rail 3 offset relative to each other along the length L of the contact rail 3. The direction in which the spring leg 6 faces forward, the direction in which the second spring leg 7 faces forward, or the direction in which the first spring leg 6 faces forward, and the second spring leg 7 forward Arranged in a direction toward the side, characterized in that a plurality of fixing points are formed on one and the same contact rail, Connecting device. delete The method of claim 1, Characterized in that the leaf spring 4 has a V shape with two longitudinal legs 6, 7 connected to one another via one bend 27, Connecting device. delete The method of claim 3, wherein Characterized in that the first spring leg 6 forms an angle of 30 to 60 ° with the second spring leg 7, ie the contact leg, Connecting device. The method according to any one of claims 1, 3, and 5, From the base leg 39 of the roll 9 with two longitudinal legs 12, 13, the flap 10 extending from the base leg 39 is bent vertically upwards, whereby the roll base Through-hole 11 in the form of a window is formed in the leg 39, characterized in that the first spring leg is supported on the flap 10, Connecting device. The method according to any one of claims 1, 3, and 5, The width of the roll 9 actually coincides with the width of the leaf spring 4 so that the leaf spring fills the U-shaped free cross section of the roll 9 and extends from one longitudinal leg 12 to the other. Characterized in that extends to the leg 13, Connecting device. The method according to any one of claims 1, 3, and 5, Characterized in that the leaf spring 4 is slightly wider than the roll 9, and is firmly fixed inside the roll, while slightly extending the roll. Connecting device. 6. The method of claim 5, At the free ends of the longitudinal legs 12, 13 of the roll 9, in each region the first spring leg 6 projects upward from the roll 9, the flaps 14, 15 are provided with the It is characterized in that it is formed by bending inward from the contact rail toward the leaf spring (4), Connecting device. The method of claim 9, Characterized in that the flaps 14, 15 are engaged inside the corresponding recesses 16, 17 formed in the first spring leg 6, Connecting device. 6. The method of claim 5, A second spring leg 7 having a free end formed at an angle with respect to the base leg 39 of the roll extends obliquely into the roll 9 and within the roll springs the second spring leg 7. Characterized in that the free end of the contact rail is arranged in contact with the attachment 18 of the contact rail, the attachment of the contact rail being integrally connected with the roll 9. Connecting device. The method of claim 11, wherein The attachment of the contact rail is characterized in that it is bent inwardly in the inner direction of the roll from one of the two longitudinal legs of the U-shaped roll 9, Connecting device. The method of claim 11, wherein It is characterized in that the attachment 18 of the contact rail is fixed in the form of a lock to the remaining longitudinal legs 13, Connecting device. The method of claim 11, wherein Characterized in that the base leg 39 of the rolling element 9 includes an incision for receiving an end of the conductor below the fixing point between the leaf spring 4 and the attachment 18 of the contact rail, Connecting device. The method of claim 11, wherein Characterized in that the attachment of the contact rail is freely cut from the base leg 39 of the rolling element 9 and bent upwards from the rolling base leg 39, Connecting device. 6. The method of claim 5, It is characterized in that a flat portion 28 is provided at the free end of the contact leg 7 of the leaf spring 4, Connecting device. The method according to any one of claims 1, 3, and 5, Characterized in that the small leg 33 for soldering is directly formed on the contact rail 3, Connecting device. The method according to any one of claims 1, 3, and 5, In the region adjacent to at least one of the leaf springs 4 the contact rail 3 has a perforation 23 for inserting a plug 24, which is provided with a transverse connection device or a test tab. Characterized in that can be used to implement Connecting device. 6. The method of claim 5, In the end region of the first spring leg 6, which is coupled to the rolling element 9, the first spring leg 6 has a window-shaped through hole 41 and the rolling base leg 39. Characterized in that the bent flaps (42, 43) extend from the through hole, Connecting device. 20. The method of claim 19, Characterized in that the flap 42 is bent in a Z-shape, Connecting device. 20. The method of claim 19, A through hole 44 is formed at the height of the base leg 39 of the roll, and the flap 43 is bent in the plane of the base leg of the roll, so that the first spring leg is moved in the spring-loaded position. Characterized by protruding slightly downward and outward from the base leg 39 of (9), Connecting device. The method according to any one of claims 1, 3, and 5, Characterized in that the leaf spring 53 forms a closed loop, Connecting device. delete 23. The method of claim 22, The loop 58 has an elongate shape, characterized in that aligned in a state inclined in the insertion direction (L) of the conductor, Connecting device. 6. The method of claim 5, The leaf spring 4 is fixed only in the first spring leg 6 in the contact rail 3, the contact rail 3 being formed as a stamped / curved part, Connecting device. The method according to any one of claims 1, 3, and 5, Characterized in that the leaf spring (4) is fixed on the longitudinal legs (12, 13) of the roll, Connecting device. The method according to any one of claims 1, 3, and 5, At the free ends of the two longitudinal legs 12, 13 from the two longitudinal legs 12, 13 of the roll 9, stamped flaps 14, 15 are bent inward from the contact rail and Characterized in that the flaps are formed up to a slot 66 to which the leaf spring 4 is coupled, so that the leaf spring is fixed and supported in the slot region. Connecting device. The method according to any one of claims 1, 3, and 5, A stamping portion 63 is formed in the longitudinal legs 12 and 13 of the rolling element 9 which engages in a corresponding side recess 64 in the supporting leg 6 of the leaf spring 4. Characterized in that Connecting device. The method according to any one of claims 1, 3, and 5, The lower end region 65 of the leaf spring 4 coupled to the lower through 11 of the roll 9 is characterized in that the leaf spring is protected from rotation, Connecting device. The method according to any one of claims 1, 3, and 5, Characterized in that one leg of the leaf spring comprises one stairway 67, Connecting device.

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