DE102021105122A1 - contact device - Google Patents

Abstract

Shown and described is a contact device (1) with a contact element (2), with a holder (3) in which the contact element (2) is slidably arranged, with a spring (4) and with a slidable relative to the holder (3). Actuating element (5), wherein the spring (4) can be transferred from a relaxed state to a tensioned state by means of the actuating element (5) and wherein the spring (4) acts on the contact element (2) with a force in the tensioned state,The contact device ( 1) is particularly suitable for use in direct current applications in that two locks (6, 7) are designed so that the contact element (2) can be locked by the first lock (6) against a first force (F1) of the tensioned spring (4 ) is held in a first position and, when the first locking mechanism (6) is released, is brought from the first position into a second position by the first force (F1) of the spring (4) such that the contact element (2) is held in the second position by the second lock (7) against a second force (F2) of the tensioned spring (4) acting on it and when the second lock (7) is released by the second force (F2) of the spring (4). the second position is brought to the first position, and that the first force (F1) of the tensioned spring (4) and the second force (F2) of the tensioned spring (4) are directed in opposite directions.

Description

The invention relates to a contact device with a contact element, with a holder in which the contact element is displaceably arranged, with a spring and with an actuating element that can be displaced relative to the holder, the spring being transferrable from a relaxed state to a tensioned state by means of the actuating element and wherein the spring in the tensioned state acts on the contact element with a force.

In connectors, contact elements are used to complete a circuit by connecting the contact element to a corresponding mating contact element in a mating connector. Such plug connectors are known, for example, as round plug connectors, which are generally designed to have multiple poles, so that a contact carrier arranged in the plug housing has a plurality of contact elements. The individual contact elements are mostly designed as pin contacts or as socket contacts. In addition to circular connectors, which are used extensively in field cabling, for example, there are a large number of other connectors that differ in structure depending on the application and area of use, especially in their shape and size.

In addition, an electrically conductive contact element can also be used to connect or separate two contacts, for example two contact tongues. In one position of the contact element, the two contacts are then electrically conductively connected to one another via the contact element, while the two contacts are not electrically connected to one another in the other position of the contact element.

Regardless of the specific design and arrangement of the contact element, there is a problem with DC voltage or direct current applications in that when the circuit is broken, an arc occurs between the contacts that are not connected to one another, which can damage at least the contact element. Therefore, in direct current applications, the aim is always to ensure that the contacts separate as quickly as possible, so that an existing arc is interrupted as quickly as possible. In practice, there are various approaches to solving this problem, mostly using springs, with the help of which the contacts are to be separated quickly. When using contact elements in DC applications, however, damage can occur not only when the contacts are separated due to the presence of an arc, but also when the contacts are connected, i.e. when the circuit is closed via the contact element. Here, too, an arc can occur, which can lead to damage to the contact element or the contacts.

The present invention is therefore based on the object of specifying a contact device with a contact element that is slidably arranged in a holder, which is particularly suitable for use in direct current applications and interrupts an existing arc when a circuit is separated and closed as quickly as possible.

With the contact device described at the outset, this object is essentially achieved in that a mechanical preload can be generated on the contact element, which can be released in a defined manner by means of unlocking, whereby the contact element is brought from a first position into a second position by the mechanical preload. In the contact device according to the invention, this principle is doubled in that two locks are formed, through which the contact element is held in one position against a force of a tensioned spring acting on it, while when the lock is released, the contact element moves into another position due to the force of the spring position is spent.

The contact element is held in a first position by the first locking mechanism against a first force of the tensioned spring acting on it and, when the first locking mechanism is released, is brought from the first position into a second position by the first force of the spring. Correspondingly, the contact element is held in the second position by the second locking mechanism against a second force of the tensioned spring acting on it and, when the second locking mechanism is released, is moved from the second position back to the first position by the second force of the spring. The first force of the tensioned spring and the second force of the tensioned spring are directed in opposite directions, so that when the first locking mechanism is released, the contact element can be moved from the first position to the second position by the first force, and when the second locking mechanism is released, it can be moved from the second position by the second force second position is brought to the first position.

The tensioned spring ensures that the contact element is quickly moved from its first position to its second position or quickly from its second position to its first position. This makes it possible not only a quick disconnect, but also a to ensure rapid closing of second contacts by means of the contact element.

The contact device according to the invention has the advantage that it enables both rapid disconnection and rapid connection of the contact element to a mating contact element or two contacts via the contact element, while still having a simple structure. Advantageously, only one spring is required to bring the contact element both from the first position into the second position and from the second position into the first position, which spring must be correspondingly tensioned in each case. The spring is preferably designed as a cylindrical compression spring that surrounds a section of the contact element. The contact element is thus arranged with a section inside the compression spring, i.e. the longitudinal axis of the contact element and the longitudinal axis of the compression spring coincide. This enables a compact arrangement of the contact device. In addition, an additional holder for the spring can be dispensed with.

According to a further particularly advantageous embodiment of the invention, two ring-shaped discs are mounted on the contact element at a distance from one another, with the spring being arranged between the two discs. The two discs are mounted on the contact element in such a way that they can each be displaced in one direction, namely in the direction of the other disc. As a result, by moving one disk, the distance between the two disks can be reduced and the spring arranged between the two disks can thus be tensioned. If one disk is moved in the direction of the other disk by means of the actuating element, the other disk also serves as a stop for the spring, since the other disk is arranged on the contact element so that it can only be displaced in the opposite direction.

The above-described arrangement of the two ring-shaped disks on the contact element, each displaceable in only one direction, can be implemented particularly easily in that a fixing element is fastened to the contact element on the side of the two disks facing away from the opposite disk. A securing ring or a similar component for one-sided axial fixing of the respective ring-shaped disk on the contact element can be used as a fixing element. The locking ring is then preferably arranged in a corresponding groove or recess in the contact element. For example, if the first annular disc is displaced in the direction of the second disc, the first disc is simultaneously moved away from its associated retaining ring, while the second disc is held in position by its associated retaining ring. As a result, the compression spring arranged between the two ring-shaped discs is then tensioned.

The contact device according to the invention has two locks, by means of which the contact element is held in the first position and in the second position, respectively, against the corresponding force of the tensioned spring. The two locks are preferably each formed between the contact element and the holder. This also has the advantage that the contact device can be made as simple and compact as possible.

Preferably, the two locks are each formed by a locking projection formed on the contact element and a spring element arranged on the holder. The two latching projections on the contact element are preferably designed in the shape of a cone, as a result of which the two latches can each be transferred more easily into the latched or latched state. In the locked state of a lock, the latching projection bears against the associated spring element, as a result of which displacement of the contact element in one direction is prevented. If the spring element is deflected against its spring force so that it is no longer in engagement with the associated latching projection, the locking is released and the contact element can be moved from one position to another position by the force of the tensioned spring.

In the contact device according to the invention, the actuating element serves to convert the spring from a relaxed state to a tensioned state. According to a particularly preferred embodiment, the actuating element is additionally designed in such a way that the corresponding locking mechanism is also released at the same time as the actuating element when the spring is tensioned to such an extent that a defined force acts on the contact element. For this purpose, an unlocking section is formed on each of the two end faces of the actuating element, so that when the actuating element is in a first end position, the first unlocking section releases the first lock by deflecting the first spring element so that it no longer interacts with the first latching projection of the first lock. In the second end position of the actuating element, the second lock is released by the second unlocking section, in that the second spring element is deflected in such a way that it no longer interacts with the second latching projection of the second lock.

Such a design of the actuating element has the advantage that when the actuating element is moved in the direction of the first end position, the compression spring surrounding the contact element is initially tensioned and when the end position is reached the first lock is automatically released, causing the contact element to move from its first position to its second position is postponed. Accordingly, when the actuating element is pushed back from the first end position in the direction of the second end position, the compression spring is tensioned again, with the second locking being released when the second end position is reached, so that the contact element then moves out of the second position due to the second force of the tensioned spring acting on it is moved back to the first position.

As previously explained, the actuating element not only serves to convert the spring from a relaxed state to a tensioned state, but also at the same time to unlock the first lock and the second lock. According to a structurally advantageous embodiment, the actuating element is U-shaped, so that it has two U-legs and a base as a U-back. The U-legs of the actuating element are preferably in turn U-shaped, each having two webs as U-legs, which are arranged opposite one another on both sides of the contact element. The actuating element is dimensioned in such a way that the two ring-shaped discs are arranged on the contact element between the U-legs of the actuating element. The two U-legs of the actuating element are thus each arranged on the side of one of the two panes facing away from the opposite pane, on which the fixing elements are also fastened on the contact element.

The webs of a U-leg associated with an annular disk are at a distance from one another that is greater than the corresponding dimension of the corresponding fixing element, so that the actuating element can be displaced both in relation to the holder and in relation to the contact element. When the actuating element is displaced, the two webs of a U-leg thus interact with the associated annular disc, as a result of which the spring can be tensioned. For easy actuation of the actuation element, it can have a grip section that can be gripped by a user with one hand or with two fingers to move the actuation element.

According to a preferred embodiment, the holder of the contact device is also U-shaped, having two U-legs and a base as the U-back. A bore with a guide element arranged therein is formed in each of the U-legs, the guide element serving to guide the contact element in the bores of the U-legs. If the contact element has a cone-shaped latching projection, the guide elements in the U-legs of the holder are preferably designed in a corresponding cone shape, so that when the contact element is in the first position, the first latching projection is in the first guide element and in the second position of the contact element, the second latching projection is in the second guide element is arranged. The spring elements used for locking are preferably each arranged on one of the two U-legs of the holder, as a result of which both reliable guidance and reliable locking of the contact element are ensured overall.

It is particularly advantageous if the contact element, the holder and the actuating element are dimensioned such that when the contact element has been moved from the first position to the second position after the first lock has been released, the second lock is automatically engaged. This ensures that the contact element is not already moved in the direction of its first position when the actuating element is pushed back, but only when the actuating element is again in its second end position and the second locking is thereby released.

According to a variant of the contact device according to the invention, a second spring is provided and arranged in such a way that the second spring is in the tensioned state when the contact element is in its second position. In its second position, the contact element is then subjected to a force by the tensioned second spring, by means of which the contact element can be brought from the second position into the first position. In this embodiment, the second spring is tensioned when the actuating element is brought into its first end position, for which purpose a user has to move the actuating element accordingly. By using a second spring, however, the actuating element does not have to be moved again by the user from its first end position to its second end position when the contact element is to be brought back into its first position, but this movement is generated by the force of the second spring.

So that the contact element is not brought back into its first position unintentionally by the second spring, a locking section is preferably formed on the actuating section forms a lock with the second spring. This ensures that the contact element is only moved from the second position into the first position by the force of the tensioned second spring if the locking between the locking section and the second spring has been released beforehand.

• 1 eine perspektivische Darstellung eines Ausführungsbeispiels der Kontaktvorrichtung,
• 2 eine Seitenansicht der Kontaktvorrichtung gemäß 1, in vier verschiedenen Zuständen,
• 3 einen Längsschnitt der Kontaktvorrichtung, in den vier Zuständen gemäß 2,
• 4 eine Draufsicht auf die Kontaktvorrichtung mit noch nicht gelöster erster Verriegelung und ein vergrößerter Detailausschnitt der Kontaktvorrichtung,
• 5 eine vergrößerte perspektivische Detaildarstellung der Kontaktvorrichtung, mit noch nicht gelöster erster Verriegelung,
• 6 eine vergrößerte Detaildarstellung der ersten Verriegelung, im Schnitt,
• 7 eine vergrößerte Detaildarstellung der zweiten Verriegelung im Schnitt,
• 8 eine zweite Ausführungsvariante einer erfindungsgemäßen Kontaktvorrichtung, in zwei verschiedenen Zuständen, und
• 9 zwei Anwendungsvarianten der Kontaktvorrichtung gemäß 1, in perspektivischer Darstellung.

In detail, there are several possibilities for designing and developing the contact device according to the invention. For this purpose, reference is made both to the individual patent claims and to the following description of preferred exemplary embodiments in connection with the drawing. Show in the drawing:

• 1 a perspective view of an embodiment of the contact device,
• 2 a side view of the contact device according to FIG 1 , in four different states,
• 3 a longitudinal section of the contact device, in the four states according to 2 ,
• 4 a top view of the contact device with the first latch not yet released and an enlarged detail of the contact device,
• 5 an enlarged perspective detail view of the contact device, with the first locking not yet released,
• 6 an enlarged detail view of the first lock, in section,
• 7 an enlarged detailed view of the second lock in section,
• 8th a second variant embodiment of a contact device according to the invention, in two different states, and
• 9 two application variants of the contact device according to 1 , in perspective view.

the 1 until 7 show a first exemplary embodiment of a contact device 1 according to the invention. The contact device 1 has a contact element 2 which is arranged displaceably in a holder 3 . In addition, the contact device 1 also has a spring 4 which can be transferred from a relaxed state to a tensioned state by means of an actuating element 5 .

As in particular from the four representations in the 2 and 3 As can be seen, the actuating element 5 can be displaced relative to the holder 3 . If the actuator 5 from the in the 2a and 3a position shown in the 2 B and 3b Shifted position shown, the spring 4 is transferred from a relaxed state to a tensioned state, in which the spring 4 acts on the contact element with a first force F1, which in the representation according to the 2 and 3 is directed to the right.

The contact device 1 also has a first locking mechanism 6, which holds the contact element 2 in an in 2 B and 3b shown first position. If the first lock 6 is released, the contact element 2 is moved by the first force F1 of the spring 4 from the first position to the second position, which is in the 2c and 3c and also in 1 is shown.

In addition to the first lock 6, the contact device also has a second lock 7, by which the contact element 2 is held in the second position against a second force F2 of the tensioned spring 4 acting on it. If the second lock 7 is released, the contact element is released by the second force F2 of the spring 4, which is shown in accordance with FIGS 2 and 3 is directed to the left, brought from the second position back to the first position. The first force F1 and the second force F2 are thus directed in opposite directions.

In the configurations of the contact device 1 illustrated in the figures, the spring 4 is designed as a cylindrical compression spring which surrounds a section of the contact element 2 so that the longitudinal axis of the contact element 2 and the longitudinal axis of the spring element 4 coincide. As a result, the space required by the contact element 2 and the compression spring 4 is minimal.

In the in the 2a and 3a shown state of the contact device 1, the contact element 2 is in its first position. In addition, the spring 4 is in the relaxed state. The first lock 6 is in the locked state, while the second lock 7 is in the released state. In the in the 2 B and 3b the state of the contact device 1 shown, the actuating element 5 has been shifted to the right, as a result of which the spring 4 is tensioned. Since the first lock 6 is still in the locked state, the contact element 2 is still in its first position against the first force F1 of the spring 4 acting on it. The second lock 7 is unchanged in the released state.

In the in the 2c and 3c shown state of the contact device 1 is the first lock 6 in the released state, so that the contact element 2 by the force F1 in its second position has been moved. The spring 4 is now back in the relaxed state. By moving the contact element 2 into its second position, the second lock 7 is now in the locked state.

In the in the 2d and 3d State of the contact device 1 shown, the contact element 2 is still in its second position, while the actuating element 5 has been shifted to the left again, whereby the spring 4 is tensioned. Since the second lock 7 is still in the locked state, the contact element 2 has not yet been pushed back into its first position against the second force F2 of the spring 4 acting on it. If the actuating element 5 is now pushed into its second end position and the second lock 7 is thereby released, the contact element 2 is pushed back into its first position by the second force F2 of the spring 4 . It is then again the in 2a and 3a state shown.

Both according to the side view 2 as well as from the sectional view according to 3 It can be seen that on the contact element 2 two ring-shaped discs 8, 9 are mounted at a distance from one another, with the two discs 8, 9 each being arranged to be displaceable in the direction of the other disc 9, 8. The pane 8 on the left in the figures can thus be displaced in the direction of the right pane 9 and the pane 9 on the right in the figures can be displaced in the direction of the left pane 8 on the contact element 2 . So that the two disks 8 , 9 can only be displaced in one direction, a locking ring 10 is fastened on the contact element 2 on the side of the two disks 8 , 9 facing away from the opposite disk 8 , 9 .

Since the spring 4 is arranged between the two discs 8, 9, the spring 4 can be brought from the relaxed state to a tensioned state in that either the first disc 8 in the direction of the second disc 9 or the second disc 9 in the direction of the first Disk 8 is moved. In the exemplary embodiment, this is done by moving the actuating element 5 accordingly.

The two locks 6 , 7 , by which the contact element 2 is held in its respective position against a force F1 or F2 of the spring 4 acting on it, are each formed between the contact element 2 and the holder 3 . For this purpose, two cone-shaped latching projections 11 are formed on the contact element 2 and two spring elements 12 are arranged on the holder 3, with one latching projection 11 forming a lock 6, 7 with a spring element 12 in each case. The configuration of the locks 6, 7 can be seen in particular from the enlarged detail views, the 4b , 5 and 6 the first latch 6 and the 7 show the second lock 7 in the locked state. In this case, the locking projection 11 rests with its stop edge on the spring element 12 so that further movement of the contact element 2 is prevented.

An unlocking section 15 is formed on each of the two end faces 13 , 14 of the actuating element 5 in order to release the two locks 6 , 7 . In the first end position of the actuating element 5 according to the 2c and 3c the spring element 12 of the first lock 6 is deflected by the unlocking section 15 in such a way that it no longer interacts with the latching projection 11 of the first lock 6 . As a result, the contact element 2 is then displaced from its first position into its second position by the first force F1 of the spring element 4 (cf. 2c and 3c ).

Accordingly, the spring element 12 of the second lock 7 is deflected by the second unlocking section 15 when the actuating element 2 is in its second end position, so that the spring element 12 no longer interacts with the corresponding latching projection 11 . As in particular from the perspective view according to 1 as well as from the plan view according to 4a and according to the enlarged detail view 5 As can be seen, the unlocking sections 15 each have a bevel 16 through which the respective spring element 12 is deflected when the actuating element 5 approaches its respective end position.

In the illustrated embodiment of the contact device 1, the actuating element 5 is U-shaped overall, so that it has two U-legs and a base 17 as the U-back. The U-legs of the actuating element 5 are in turn U-shaped and each have two webs 18 which are arranged opposite one another on both sides of the contact element 2 . The actuating element 5 thus has a total of four webs 18 which protrude from the four corners of the base 17 . The ring-shaped disks 8, 9 are arranged between the U-legs of the actuating element 5, so that when the actuating element 5 is displaced in one direction or the other, the corresponding disk 8, 9 is displaced along the contact element 2, whereby the spring 4 is tensioned at the same time becomes. The distance between the two webs 18 of a U-leg is chosen so large that the webs 18 interact with the disks 8, 9 on the one hand, but on the other hand the displaceability of the actuating element 5 is not impeded by the retaining rings 10. to one multiple actuation of the actuating element 5, a handle section 19 is formed on this, which can be easily grasped by a user with one hand or two fingers.

The holder 3 of the contact device 1 is also U-shaped and has two U-legs 20, 21 and a base 22 as a U-back. In each of the U-legs 20, 21 there is a bore 23 with a guide element 24 arranged therein, which serves to guide the contact element 2 in the respective bore 23 of the U-legs 20, 21. The guide elements 24 in the U-legs 20, 21 of the bracket 3 are designed to correspond to the cone-shaped locking projections 11 on the contact element 2, so that in the first position of the contact element 2 the first locking projection 11 in the first guide element 24 and in the second position of the contact element 2 the second latching projection 11 is arranged in the second guide element 24.

From the detail view according to 5 It can be seen that the spring elements 12 are each arranged on one of the two U-legs 20, 21 of the bracket 3, wherein a guide is formed in the U-legs 20, 21, within which the L-shaped spring element 12 is guided when the spring element 12 is deflected by the unlocking section 15 of the actuating element 5 .

8th shows a variant of the contact device 1, which also has a second spring 25. The second spring 25 is according to 8a in the stressed state when the contact element 2 is in its second position. The contact element 2 is acted upon by the tensioned second spring 25 with a force F3 which is shown in accordance with FIG 8th is directed to the left. However, since a locking section 26 is formed on the actuating section 5, the contact element 2 is not displaced to the left into its first position despite the force F3 of the second spring 25 acting on it. Only when the locking section 26 is deflected, as a result of which the locking with the spring 25 is released, is the contact element 2 displaced from the second position into the first position by the force F3, which is shown in FIG 8b is shown. By using the second spring 25, the actuating element 5 does not have to be moved from its first end position into its second end position by a user if the contact element 2 is to be brought back into its first position. This movement is created by the force F3 of the second spring 25 when the locking portion 26 is no longer in the locked position.

the 9 shows schematically two application variants for the contact device 1 according to the invention 9a The application variant shown is the contact element 2 made of a conductive material and is used to electrically connect two contact tongues 27 to one another when the contact element 2 is in the second position shown. When the contact element 2 is shifted back into the first position, the electrical connection between the two contact tongues 27 is separated. Since the movement of the contact element 2 is very fast both when connecting and when disconnecting due to the respective force F1 or F2 of the spring 4, any arc that may be present is interrupted by also fast ones, so that damage to the contact element 2 is minimized or prevented entirely.

At the in 9b The application variant shown is the contact element 2 also made of a conductive material and is connected to a corresponding socket 28 in the second position of the contact element 2 shown. When the contact element 2 is shifted back into the first position, the contact element 2 is pulled out of the socket 28 with a jerk, so that the electrical connection is separated correspondingly quickly.

Reference List

1

contact device

2

contact element

3

bracket

4

spring element

5

actuator

6, 7

interlocks

8, 9

slices

10

locking ring

11

locking projection

12

spring element

13, 14

end faces

15

unlocking section

16

oblique

17

Base

18

webs

19

handle section

20, 21

U-leg bracket

22

Base

23

drilling

24

guide element

25

second spring

26

locking section

27

contact tongues

28

Rifle

Claims (13)

Contact device (1) with a contact element (2), with a holder (3) in which the contact element (2) is displaceably arranged, with a spring (4) and with an actuating element (5) that can be displaced relative to the holder (3), wherein the spring (4) can be transferred from a relaxed state to a tensioned state by means of the actuating element (5) and wherein the spring (4) acts on the contact element (2) with a force in the tensioned state, characterized in that two locking mechanisms (6 , 7) are designed such that the contact element (2) is held in a first position by the first locking mechanism (6) against a first force (F1) of the tensioned spring (4) acting on it and when the first locking mechanism (6) is released the first force (F1) of the spring (4) is moved from the first position to a second position, so that the contact element (2) is locked by the second locking mechanism (7) against a second force (F2) of the tensioned spring (4 ) is held in the second position and, with the second latch (7) released, is moved from the second position to the first position by the second force (F2) of the spring (4), and that the first force (F1) of the tensioned spring ( 4) and the second force (F2) of the tensioned spring (4) are directed in opposite directions. Contact device (1) after claim 1 , characterized in that a cylindrical compression spring is provided as the spring (4), which surrounds a portion of the contact element (2). Contact device (1) after claim 2 , characterized in that two annular discs (8, 9) are mounted on the contact element (2) at a distance from one another, that the spring (4) is arranged between the two discs (8, 9), and that the two discs (8 , 9) are each arranged to be displaceable in the direction of the other disc (9, 8). Contact device (1) after claim 3 , characterized in that in each case on the opposite side of the disk (9, 8) facing away from the two disks (8, 9) a fixing element, in particular a locking ring (10) is attached to the contact element (2). Contact device (1) according to one of Claims 1 until 4 , characterized in that the two latches (6, 7) are each formed between the contact element (2) and the holder (3). Contact device (1) after claim 5 , characterized in that the two locks (6, 7) are each formed by a locking projection (11) formed on the contact element (2) and a spring element (12) arranged on the holder (3). Contact device (1) after claim 6 , characterized in that an unlocking section (15) is formed on each of the two end faces (13, 14) of the operating element (5), in that in a first end position of the operating element (5) the first unlocking section (15) the first spring element (12) deflects so that it does not interact with the first latching projection (11) and that in a second end position of the actuating element (5) the second unlocking section (15) deflects the second spring element (12) so that it does not interact with the second latching projection (11). Contact device (1) according to one of claims 3 until 7 , characterized in that the actuating element (5) is U-shaped and has two U-legs and a base (17) as a U-back, that the U-legs of the actuating element (5) are in turn U-shaped and each have two webs (18) which are arranged opposite one another on both sides of the contact element (2), and that the two annular discs (8, 9) are arranged between the U-legs of the actuating element (5). Contact device (1) according to one of Claims 1 until 8th , characterized in that on the actuating element (5) a handle portion (19) is formed. Contact device (1) according to one of Claims 1 until 9 , characterized in that the holder (3) is U-shaped and has two U-legs (20, 21) and a base (22) as a U-back, wherein in the U-legs (20, 21) one each Bore (23) is formed with a guide element (24) arranged therein for guiding the contact element (2). Contact device (1) after claim 10 , characterized in that the two spring elements (12) of the two locks (6, 7) are each arranged on a U-leg (20, 21) of the holder (3). Contact device (1) according to one of Claims 1 until 11 , characterized , that a second spring (25) is provided, which is arranged such that the second spring (25) is in the tensioned state when the contact element (2) is in its second position, and that the contact element (2) in its second Position is acted upon by the tensioned second spring (25) with a force by which the contact element (2) from the second position to the first position can be brought. Contact device (1) after claim 12 , characterized in that on the actuating section (5) a locking section (26) is formed, which forms a lock with the second spring (25), and that the contact element (2) only when the locking is released between the locking section (26) and the second spring (25) can be brought from the second position into the first position by the force of the tensioned second spring (25).

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