BE1026175A1 - Connecting device for connecting a shield clamp with a rail element - Google Patents

Abstract

A connecting device (1) for connecting a shield terminal (2) to a rail element (3) can be attached to the rail element (3) in a direction of attachment (E). The connecting device comprises a first latching element (10) with a first latching limb (100) and a second latching element (11) with a second latching limb (110). The first latching element (10) and the second latching element (11) are at least partially parallel to each other along a direction of movement (B) and connected to each other such that the first latching element (10) and the second latching element (11) along the direction of movement (B) are mutually movable to the connecting device (1) via the latching elements (10, 11) positively connected to the rail element (3) or to be detached from the rail element (3).

Description

Connection device for connecting a shield clamp to a rail element

The invention relates to a connecting device for connecting a shield clamp to a rail element according to the preamble of claim 1.

Such a connecting device can be attached to a rail element along an attachment direction in order in this way to connect the connecting device to the rail element. For example, a shield clamp can be connected to the connecting device, so that the shield clamp can be fixed to the rail element via the connecting device.

A shield clamp is used to contact a shield conductor, for example in the form of a cable core surrounding the electrical cable, with a discharge potential, in particular a grounding potential - for example a busbar, a mounting rail or a housing wall of an electrical system (e.g. a control cabinet). The contact should be stable, especially temperature and corrosion resistant (even in an aggressive environment) in order to reliably ground the shield conductor over the life of an electrical system.

Rail elements can have different shapes. For example, a so-called C-rail can have edge sections pointing inwards towards one another, which form a slot opening between them. In contrast, other rail elements can be designed, for example, as a mounting rail with edge sections pointing outwards.

To attach a shield clamp to such a rail element, it is desirable to have a connecting device which is simple in construction, simple to produce and, moreover, easy to handle.

In the case of a connecting device provided in DE 10 2009 057 514 B3, a shielding cable can be fixed to a clip using a clip element. The clip can be snapped onto a mounting rail.

DE 103 15 668 B4 discloses a connection terminal with a busbar and a base section for latching fixing on a mounting rail.

BE2018 / 5224

A device known from DE 199 49 508 B4 for fastening a

Shield clamp has a body with feet for snapping connection to a mounting rail.

The object of the present invention is to provide a connecting device for connecting a shield clamp to a rail element, which is simple in construction, thereby easy to manufacture and also easy to handle.

This object is achieved by an object with the features of claim 1.

Accordingly, the connecting device has a first locking element with a first locking leg and a second locking element with a second locking leg. The first latching element and the second latching element are parallel to one another at least in sections along a direction of movement and are connected to one another in such a way that the first latching element and the second latching element can be moved relative to one another along the direction of movement in order to connect the connecting device to the rail element in a form-fitting manner or by to solve the rail element.

The connecting device thus has two locking elements which can be moved relative to one another, each with (at least) one locking leg. For example, a first latching device in the form of a first latching projection or the like can be formed on the first latching leg, while a second latching device is formed on the second latching leg, for example in the form of a second latching projection. The latching legs together serve for latching connection of the connecting device to edge sections of a rail element, for example in the form of a C-rail with edge sections pointing inwards or a mounting rail with edge sections pointing outwards.

The latching elements extend at least in sections parallel to one another along the direction of movement and can be moved relative to one another along the direction of movement. When the connecting device is attached to an assigned rail element, the latching legs of the latching elements can thus be moved against one another, so that the connecting device can snap into engagement with the rail element. Likewise, the detent elements can be moved towards each other to release the connection of the connecting device with the rail element,

BE2018 / 5224 so that the positive connection of the connecting device to the rail element is released and the connecting device can be removed from the rail element against the direction of attachment.

The direction of attachment can in principle be straight or curved. The connecting device can be attached to the rail element along the attachment direction, the latching legs of the latching elements engaging with the rail element in a latching manner. For example, the connecting device can be pivoted onto the rail element by first attaching one of the latching elements to an assigned edge section of the rail element, in order then to pivot the connecting device towards the rail element and thereby also to bring the other latching element into engagement with the rail element.

In one embodiment, the first locking element and the second locking element are connected to one another via a connecting section. The connecting section can, for example, be integrally formed both with the first latching element and with the second latching element. The connecting section can be bent at least in sections (by approximately 180 °) to connect the first latching element to the second latching element. For this purpose, the connecting section is formed, for example, at a first end of the connecting device, while the latching elements (at least in sections extending parallel to one another along the direction of movement) are not connected to one another at a second end of the connecting device (lying along the direction of movement) from the first end.

In a particularly advantageous embodiment, the connecting device is manufactured as a one-piece component, with latching elements integrally connected to one another via the connecting section. The connecting device can be manufactured, for example, as a stamped sheet metal bent part, for example from a steel material, for example spring steel, so that an elastic connection between the latching elements is produced in particular via the connecting section. The integral manufacture of the connecting device as a one-piece component results in a particularly simple construction which is simple and inexpensive to manufacture and is easy to handle both in terms of assembly and in its intended use.

BE2018 / 5224 In one embodiment, the second locking element is guided along the direction of movement on the first locking element. Movement of the latching elements relative to one another thus takes place in a defined manner along the direction of movement, so that the latching elements can be moved relative to one another in a guided manner along a defined movement path.

For this purpose, the first latching element can have, for example, a first guide device and the second latching element can have a second guide device guided positively along the direction of movement on the first guide device. One of the guide devices can be formed, for example, by a guide slot in which the other, for example, is designed as a guide projection

Guide device is slidably guided. For example, a guide device designed as a guide slot can be formed by embossments on the latching leg of the associated latching element, while the guide device of the other latching element is shaped by a punched-out guide lug that engages in the guide slot.

The latching elements can be moved relative to one another along the direction of movement and are preferably guided towards one another via the guide devices such that the movement takes place in a guided manner. The path by which the locking elements can be moved relative to one another is limited, for example, by stops, so that the locking elements can only be adjusted by a certain distance from one another. Excessive deflection of the latching elements relative to one another is avoided in this way.

In one configuration, the first locking element and / or the second locking element, when viewed in a plane perpendicular to the direction of movement, have a U-shape. The second latching element is, for example, at least partially surrounded by the first latching element, so that there is a nested arrangement of the latching elements.

For example, the first latching element can have two first latching legs extending parallel to one another, each with a first latching device for connection to the rail element and a first base connecting the first latching legs. The locking legs extend perpendicularly from the base and in this way form the U-shape of the locking element together with the base. About the locking legs, on which locking devices, for example in the form of locking projections

BE2018 / 5224 are formed, the positive connection of the connecting device is made with the rail element.

The second locking element is preferably arranged between the locking legs of the first locking element and can be moved (in a guided manner) between the locking legs of the first locking element. The first locking element thus at least partially surrounds the second locking element.

The second locking element can have two second locking legs and a second base connecting the two second locking legs, so that the second locking element also has a U-shaped basic shape. On the second latching legs, second latching devices are formed, for example in the form of latching projections, which together with the first latching devices of the first latching legs of the first latching element produce the form-fitting connection of the connecting device to the rail element during attachment and thus hold the connecting device positively on the rail element.

Preferably, the second base of the second locking element extends parallel to the first base of the first locking element. The second locking element is thus arranged within the first locking element and is aligned with its second base along the first base of the first locking element. The latching elements can be moved relative to one another along the direction of movement, so that the latching legs can be adjusted relative to one another in this way and, for example, the connecting device can be released from the rail element by lifting the positive connection.

In one embodiment, a guide edge is formed on each first locking leg of the first locking element and on every second locking leg of the second locking element, which is directed obliquely to the direction of attachment, along which the connecting device can be attached to the rail element, and thus a run-up slope to facilitate attachment of the Provides connecting device to the rail element. When the connecting device is attached to the rail element, the guide edges slide, for example, on edge sections of the rail element, so that the latching legs are automatically adjusted relative to one another and the connecting device snaps into engagement with the rail element. When the connecting device is attached to the rail element, no actuation of the latching elements is therefore necessary. A deflection of the locking leg to each other

BE2018 / 5224 The positive connection is established automatically when the connection is made by the interaction of the guide edges with the rail element.

In the attached position, the connecting device preferably bears on the rail element with one or more height stops, which are formed on one or on both latching elements, so that when the connecting device is attached, the position of the connecting device relative to the rail element is defined in the attachment direction. In particular, the connecting device can only be moved in the attachment direction to a position in which the height stops are in contact with the rail element.

The height stops can be formed, for example, on the first locking legs of the first locking element.

In one embodiment, the first locking element has a first tool engagement and the second locking element has a second tool engagement. The tool interventions can be formed in particular at the second end of the connecting device, which is remote from the first end of the connecting device (at which the connecting section connects the latching elements to one another) and enable a relative force to be exerted between the latching elements by attaching a tool to the tool interventions. Thus, a tool, for example a screwdriver, can be used to intervene jointly in the tool interventions in order in this way to bring about a relative force between the latching elements along the direction of movement, so that the latching elements can be adjusted relative to one another along the direction of movement using a tool in order to detach the connecting device from the rail element and to cancel the positive engagement of the latching legs with the rail element.

The connecting device can be connected, for example, to a shield clamp. Such a shield clamp can have, for example, a housing and a spring element pivotably arranged on the housing. An electrical cable can be attached to the housing with a stripped shield conductor in order to make electrical contact in the housing by the spring element being clamped. The shield conductor of the electrical line can thus be electrically contacted with the rail element via the connecting device, so that the

BE2018 / 5224 shield conductor can, for example, be connected to a ground potential of the rail element.

Such a connecting device can be designed for attachment to differently shaped rail elements, for example a C-rail with inward-facing edge sections or a support rail with outward-facing edge sections. A shield clamp can be fixed on the rail element via the connecting device in order in this way to bring about electrical contact between a shield conductor of an electrical line attached to the shield clamp and the rail element.

The idea on which the invention is based is to be described below with reference to FIGS

Figures illustrated embodiments are explained in more detail. Show it:

Fig. 1 a perspective view of a first embodiment of a connecting device, with a shield clamp and Rail element in the form of a C-rail; Fig. 2 a side view of the arrangement of FIG. 1; Fig. 3 a plan view of the arrangement of FIG. 1; Fig. 4 a sectional view taken along line A-A of FIG. 3; Fig. 5 a perspective view of the connecting device together with the shield clamp, but without the rail element; Fig. 6 a side view of the arrangement of FIG. 5; Fig. 7 a separate view of the connecting device without the Shield terminal; Fig. 8 a side view of the arrangement of FIG. 7; Fig. 9 a front view of the connecting device; Fig. 10 a plan view of the connecting device;

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11 is a perspective sectional view taken along line B-B of FIG. 10.

12 shows a perspective view of a connecting device according to another exemplary embodiment, together with a shield clamp and a mounting rail;

FIG. 13 shows a side view of the arrangement according to FIG. 12;

FIG. 14 is a top view of the arrangement according to FIG. 12;

Fig. 15 is a sectional view taken along the line C-C of Fig. 14;

16 shows a perspective view of the connecting device together with the shield clamp, but without the mounting rail;

FIG. 17 shows a side view of the arrangement according to FIG. 16;

FIG. 18 shows a front view of the arrangement according to FIG. 16; and

19 is a plan view of the arrangement according to FIG. 16.

1 to 11 show an embodiment of a connecting device 1 in the form of a latching foot, which can be connected to a rail element 3 in the form of a so-called C-rail and carries a shield clamp 2, so that by attaching the connecting device 1 to the rail element 3, the shield clamp 2 is electrically connected contacted the rail element 3 and thus an electrical conductor 40 connected to the shield terminal 2 can be brought to the potential of the rail element 3.

A shield clamp 2 serves to make electrical contact with a shield conductor 40 of an electrical line 4, shown schematically in FIG. 2, in order in this way to bring the shield conductor 40 to a discharge potential, in particular an earth potential. The electrical line 4 has an electrically insulating sheathing 41 which surrounds the shield conductor 40. In the electrical line 4, for example, line wires are enclosed, via which electrical signals, for example data signals, can be transmitted. The shield conductor 40 can, for example, take the form of a braided shield

BE2018 / 5224 have and envelops the line wires enclosed in the electrical line 4 for the purpose of electromagnetic shielding.

In the exemplary embodiment shown in FIGS. 1 to 11, the shield conductor 2 has a housing 20 on which a spring element 21 is arranged so as to be pivotable about a pivot axis S. The housing 20 has an upper part 200, which supports the spring element 21, a side wall 201 and a fastening flange 202 angled to the side wall 201, via which the shield clamp 2 is connected to the connecting device 1, and defines a receiving space into which the electrical line 4 can be inserted with a stripped section of the shield conductor 40, so that the shield conductor 40 can be contacted by clamping via a clamping leg 211 of the spring element 21 with a contact surface 22 of the shield clamp 2. Via an actuating leg 210, the spring element 21 can be pivoted to the housing 20 along a pivoting direction P, in order in this way the spring element 21 between a release position in which the electrical line 4 can be inserted into the housing 20 and a clamping position in which the shield conductor 40 is electrically contacted with the support section 22 in a clamping manner.

The shield clamp 2 is fixed on the connection device 1 and can thus be attached to the rail element 3 in the form of a C-rail via the connection device 1 for the purpose of electrical contacting. The rail element 3 has a base 30 and lateral legs 31, 32 which are angled to the base 30 and of which edge sections 33, 34 are bent toward the inside. A slot opening 35 is formed between the edge sections 33, 34, into which the connecting device 1 can be inserted for latching connection to the rail element 3.

If the connecting device 1 is attached to the rail element 3, then the shield clamp 2 and, above it, an electrical line 4 connected to the shield clamp 2, in particular its shield conductor 40, are electrically connected to the rail element 3.

In the exemplary embodiment shown, the connecting device 1 has two latching elements 10, 11, which - viewed in a plane Q corresponding to the plane of the drawing in FIG. 9 - are each U-shaped and via a connecting section 12 (bent by approximately 180 °) on a first one End of the connecting device 1 are connected to each other, such as from

BE2018 / 5224 Fig. 7 and 8 can be seen. Each locking element 10, 11 has two lateral locking legs

100, 110, which, as can be seen from the frontal view according to FIG. 9, have a base

101, 111 are connected to one another to form the U-shape. At the second end of the connecting device 1 which is remote from the connecting section 12, the latching elements 10, 11 are not connected to one another and are thus free from one another.

In the illustrated embodiment, a first, outer locking element 10 encloses a second, inner locking element 11. The latching elements 10, 11 are here displaceably guided along a direction of movement B directed perpendicular to the plane Q by guiding devices 113 in the form of guiding lugs formed laterally on the base 111 of the second, inner latching element 11 slidingly in guiding devices 103 in the form of embossments

Slide guide slots on the inside of the locking leg 100 of the first, outer locking element 10 and thereby create a longitudinal guide of the second, inner locking element 11 to the first, outer locking element 10. The second, inner latching element 11 can thus be moved in the direction of movement B to the first, outer latching element 10, in order in this way, as will be explained in the following, to enable the form-fitting connection of the connecting device 1 to the rail element 3 to be made and released.

The path of the second, inner latching element 11 to the first, outer latching element 10 is limited here by stops 109A, 109B on both sides of the guide slot formed by the embossments and forming the guide device 103, so that the second, inner latching element 11 is only relative to one another by a predetermined path the first, outer locking element 10 can be moved.

On the latching legs 100 of the first, outer latching element 10, latching devices 102 in the form of latching lugs are formed on one side, as can be seen from FIGS. 7 and 8. To this end, locking devices 112 are also formed in the form of locking lugs on the locking legs 110 of the second, inner locking element 11. These locking devices 102, 112 serve together when attaching the

Connecting device 1 to the rail element 3 to produce a positive connection with the rail element 3.

Each latching leg 100, 110 also points to the respective latching device

102, 112 adjoining edge section has a guide edge 107, 117 directed obliquely to an attachment direction E, which serves as a run-up slope. In the

BE2018 / 5224

Attachment direction E, the connecting device 1 can be attached to the rail element 3, so that when the connecting device 1 is attached to the rail element 3, the latching legs 100, 110 with their guide edges 107, 117 with the inner edges of the edge sections 33, 34 of the rail element delimiting the guide slot 35 3 come into contact and thereby the locking legs 100, 110 are pressed towards each other along the direction of movement B, with elastic adjustment of the locking elements 10, 11 along the direction of movement B to each other and with (slight) deformation of the connecting section 12. Die

Connecting device 1 thus engages with its locking legs 100, 110 with guide slot 35 of rail element 3, locking legs 100, 110 snapping back into their (relaxed) starting position as soon as locking devices 102, 112 in the form of locking lugs edge portions 33, 34 have passed so that the locking legs 100, 110 for establishing a positive connection with the

Edge sections 33, 34 come into engagement, as is shown, for example, in FIGS. 1 and 2.

The position of the connecting device 1 along the attachment direction E on the rail element 3 is defined here by height stops 106 on the locking legs 100 of the first, outer locking element 10. In the attached position, the height stops 106 abut on the upper side with the edge sections 33, 34 of the rail element 3, as can be seen, for example, from FIG. 2.

If the connecting device 1 is again to be detached from the rail element 3, a tool 5, for example in the form of a screwdriver, can be made on tool engagements 105, 115 on the connector section 12

End sections 104, 114 of the locking elements 10, 11 are attached, as shown in FIG. 8. The tool 5 engages in the tool engagement 115 designed as an engagement opening on the base 111 of the second, inner latching element 11 and is also supported on the tool engagement 105 on the base 101 of the first, outer latching element 10, so that the tool 5 is actuated in an actuating direction A the second, inner latching element 11 can be adjusted in the direction of movement B to the first, outer latching element 10, as a result of which the latching legs 100, 110 are moved towards one another with their latching devices 102, 112 and thus the positive connection of the connecting device 1 with the rail element 3 will be annulled.

BE2018 / 5224 When the connection is released, the latching legs 112 of the second, inner latching element 11 also come into contact with edge sections 116 lying away from the latching devices 112 in contact with the opposite edge section 34 of the rail element 3 (see, for example, FIG. 4), so that this also results in excessive Deflection of the locking elements 10, 11 to each other is avoided. These edge sections 116 can be (as far as possible) rigid or also elastically resilient.

The connecting device 1 is, in the exemplary embodiment shown, manufactured as a one-piece component, for example as a stamped sheet-metal bent part. The connecting device 1 can be made, for example, of a steel material, for example spring steel, and is electrically conductive, so that the shield clamp 2 can be electrically contacted with the rail element 3 via the connecting device 1.

On the base 101 of the first, outer latching element 10, connecting tabs 108 projecting upward are arranged, by means of which the shield clamp 2 can be fixed on the base 101 and connected to the connection direction 1.

The fact that the connecting device 1 is manufactured as a one-piece component results in simple manufacture and also simple handling when used as intended.

Due to the guidance of the locking elements 10, 11 to one another via the guide devices 103, 113, the locking elements 10, 11 can (only) along a defined

Trajectory to each other. Due to the limitation of the movement path via the stops 109A, 109B along the movement direction B, excessive deflection of the latching elements 10, 11 with respect to one another is prevented.

The connecting device 1 of the exemplary embodiment according to FIGS. 1 to 11 is designed to be attached to a rail element 3 in the form of a C-rail. Correspondingly, the connection direction 1 can be attached to a slot opening 35 of such a C-rail in order to latch in the slot opening 35. An exemplary embodiment of a connecting device 1 shown in FIGS. 12 to 19 is designed for connection to a rail element 3 in the form of a mounting rail with outwardly facing edge sections 33, 34, as can be seen, for example, from FIGS. 12 and 13. Components with the same function are provided with the same reference symbols in the figures.

BE2018 / 5224

In the exemplary embodiment according to FIGS. 12 to 19, a first, outer latching element 10 and a second, inner latching element 11 are in turn connected to one another via a connecting section 12 and can be displaced relative to one another in a direction of movement B. The second, inner locking element 11 is here on each locking leg 100 of the first, outer locking element 10 via two

Guide devices 103 in the form of guide slots formed by embossments and spaced apart along the direction of movement B.

The latching legs 100, 110 of the latching elements 10, 11, which are connected to each other via a base 101, 111, each have a latching device 102, 112, which in the exemplary embodiment shown - due to the design of the

Rail element 3 with outwardly facing edge sections 33, 34 - facing each other, as can be seen, for example, from FIG. 13. In one of that

When the connecting device 1 is in the position of the rail element 3, the latching devices 102, 112 engage in a form-fitting manner with the edge sections 33, 34, so that the connecting device 1 is positively fixed on the rail element 3. The position of the connecting device 1 on the rail element 3 along the attachment direction E is defined here by means of height stops 106 on the first, outer latching element 10, in that the height stops 106 are in contact with the edge sections 33, 34 of the rail element 3 on the upper side.

When the connecting device 1 is attached to the rail element 3 in the attachment direction E, the latching legs 100, 110 slide onto outer edges of the edge sections 33, 34, so that the latching devices 102, 112 along the

Movement direction B are separated from each other and snap into engagement with the edge portions 33, 34. To release the connection, a tool can again be attached to tool interventions 105, 115 of the latching elements 10, 11, in order in this way to adjust the second, inner latching element 11 in the direction of movement B to the first, outer latching element 10 and above that the positive connection of the To solve connection device 1 with the rail element 3.

Otherwise, the functioning of the connecting device 1 of the exemplary embodiment according to FIGS. 12 to 19 is analogous to the functioning of the exemplary embodiment according to FIGS. 1 to 11, so that reference should also be made to the preceding explanations. As in the embodiment according to FIGS. 1 to 11, in the embodiment according to FIGS. 12 to 19 the base 101 of the

BE2018 / 5224 arranged first shielding element 10, a shield clamp 2, via which an electrical line with a shield conductor can be connected in an electrically contacting manner and thus can be electrically connected to the rail element 3.

In both exemplary embodiments, the latching legs 102, 112 can be designed to be resilient in themselves or (largely) rigid.

The idea on which the invention is based is not restricted to the exemplary embodiments described above, but can in principle also be implemented in a completely different manner.

A connecting device of the type described here can be used to connect a shield clamp to rail elements of very different types.

In principle, the connecting device is not only suitable for connecting a shield conductor to a rail element, but can also be used to connect another terminal for connecting other electrical conductors to a rail element.

LIST OF REFERENCE NUMBERS

BE2018 / 5224

Connection device (snap-in foot)

locking element

100 locking legs

101 base

102 locking device (locking lug)

103 guide device

104 end section

105 tool engagement (tool guide)

106 height stop

107 leading edge

108 connecting straps

109A, 109B stop

locking element

110 locking legs

111 base

112 locking device (locking lug)

113 guide device

114 end section

115 Tool intervention

116 edge section

117 leading edge

connecting portion

shield clamp

casing

200 top

201 side wall

202 mounting flange

spring element

210 actuating legs

211 clamping legs

bearing surface

rail element

Base

31, 32 legs

33, 34 edge section

BE2018 / 5224

slot opening

Electrical line

shieldwires

jacket

5 tools

A direction of actuation

B Direction of movement

E Approach direction

P swivel direction

Q level

swivel axis

Claims (18)

BE2018 / 5224 claims 1. Connecting device (1) for connecting a shield clamp (2) to a rail element (3), the connecting device (1) being attachable to the rail element (3) in an attachment direction (E), characterized by a first latching element (10) a first locking leg (100) and a second locking element (11) with a second locking leg (110), the first locking element (10) and the second locking element (11) extending at least in sections along a direction of movement (B) parallel to one another and connected to one another in this way are that the first latching element (10) and the second latching element (11) can be moved relative to one another along the direction of movement (B) in order to connect the connecting device (1) to the rail element (3) in a form-fitting manner or to be detached from the rail element (3). 2. Connecting device (1) according to claim 1, characterized in that the first latching leg (100) has a first latching device (102) and the second latching leg (11) is a second latching device (112) for latching connection with edge sections (33, 34) of the Have rail element (3). 3. Connecting device (1) according to claim 1 or 2, characterized by a connecting section (12) which connects the first latching element (10) and the second latching element (11) to one another. 4. Connecting device (1) according to claim 3, characterized in that the connecting portion (12) for connecting the first locking element (10) with the second locking element (11) is bent. 5. Connecting device (1) according to one of the preceding claims, characterized in that the connecting device (1) is made as a one-piece component. 6. Connecting device (1) according to one of the preceding claims, characterized in that the second latching element (11) is guided along the direction of movement (B) on the first latching element (10). 7. Connecting device (1) according to claim 6, characterized in that the first latching element (10), a first guide device (103) and the second BE2018 / 5224 detent element (11) has a second guide device (113) guided on the first guide device (103) in a form-fitting manner along the direction of movement (B). 8. Connecting device (1) according to one of the preceding claims, characterized in that the movement of the first locking element (10) and the second locking element (11) along the direction of movement (B) to each other is limited by at least one stop (109A, 109B). 9. Connecting device (1) according to one of the preceding claims, characterized in that the first locking element (10) and / or the second locking element (11), viewed in a plane (Q) perpendicular to the direction of movement (B), have a U-shape. 10. Connecting device (1) according to one of the preceding claims, characterized in that the second latching element (11) is at least partially surrounded by the first latching element (10). 11. Connecting device (1) according to one of the preceding claims, characterized in that the first latching element (10) two parallel latching legs (100) each having a first latching device (102) for connecting to the rail element (3) and one has the first locking legs (100) connecting the first base (101). 12. Connecting device (1) according to claim 11, characterized in that the second latching element (11) between the two first latching legs (100) of the first latching element (10) is arranged. 13. Connecting device (1) according to claim 11 or 12, characterized in that the second locking element (11) two second locking legs (110) each with a second locking device (112) for connecting to the rail element (3) and one of the second locking legs ( 110) which connects to one another, has a second base (111). 14. The connecting device (1) according to claim 13, characterized in that the second base (111) of the second locking element (11) extends parallel to the first base (101) of the first locking element (10). BE2018 / 5224 15. Connecting device (1) according to one of the preceding claims, characterized in that the first locking leg (100) is directed obliquely to the attachment direction (E), the first guide edge (107) and / or the second locking leg (110) is inclined to the attachment direction ( E) directed, second leading edge (117) to Have interaction with the rail element (3) when attaching. 16. Connecting device (1) according to one of the preceding claims, characterized in that the first latching element (10) and / or the second latching element (11) at least one height stop (106) for abutting the rail element (3) in the direction of the attachment direction ( E) with the connecting device (1) attached to the rail element (3). 17. Connecting device (1) according to one of the preceding claims, characterized in that the first latching element (10) has a first tool engagement (105) and the second latching element (11) has a second tool engagement (115), one tool (5) the first tool engagement (105) and the second tool engagement (115) can be jointly applied in order to move the first latching element (10) and the second latching element (11) towards one another along the direction of movement (B). 18. shield clamp (2) for electrically connecting a shield conductor (4) of an electrical line (4), with a connecting device (1) according to one of the preceding claims.