Protective switching device with push button

Abstract

A protective switching device is to be optimized for confined installation spaces. Therefore, a protective switching device with a push button (12) is proposed. The protective switching device has, in particular, a cam (13) with which a joint (10) of the protective switching device mechanism can be guided, especially into a stable joint-in position (14) and a stable joint-out position (15).

Description

[0001] The present invention relates to a protective switching device with a contact arrangement in which, in a contact-on position, there is an electrical connection between two contact elements, and in a contact-off position, there is no electrical connection between the two contact elements. The protective switching device also includes a closing device with a transmission element by means of which the contact arrangement can be moved from the contact-off position to the contact-on position, as well as a tripping device. In particular, the protective switching device is intended to be suitable for DIN rail mounting.

[0002] The protective switching devices can be miniature circuit breakers (MCBs), residual current devices (RCDs or RCCBs), combined circuit breakers such as residual current circuit breakers with overcurrent protection (RCBOs), and similar devices. In such DIN rail-mounted protective switching devices, the mechanism is typically designed so that operation (switching on / off) is performed by a handle that rotates around an axis. This rotational actuation drives the mechanism (switching mechanism) and opens or closes the contacts.

[0003] Such rotating handles on protective switching devices require a certain amount of space so that an operator can operate the handle with their fingers. However, this space is not always available in certain installation situations. For example, if the protective switching devices are installed deep inside a control cabinet, it may not be easy to adjust the handles as desired.

[0004] The object of the present invention is therefore to enable convenient operation of a protective switching device even in confined installation conditions.

[0005] According to the invention, this problem is solved by a protective switching device according to claim 1. Advantageous embodiments of the protective switching device are described in the dependent claims.

[0006] According to the present invention, a protective switching device, particularly for DIN rail mounting, is provided. It has a contact arrangement in which, in a contact-on position, an electrical connection exists between two contact elements. The contact-on position corresponds to an on position in which the contact elements are electrically connected and the protective switching device is thus switched on. Furthermore, the contact arrangement can be in a contact-off position in which there is no electrical connection between the two contact elements. The protective switching device is accordingly switched off, and no current can flow between the contacts.

[0007] Furthermore, the protective switching device has a closing mechanism with a first (optionally rigid) transmission element by means of which the contact element can be moved from the contact-off position to the contact-on position. The closing mechanism thus has a first transmission element that may be rigid in itself. In this document, the adjective "rigid" refers to the shape of the respective transmission element, but not to its overall mobility. Rigid transmission elements are therefore elements with a fixed shape that can, however, be moved relative to other elements. For example, the transmission element could be a rod or a specially shaped solid structure. The transmission element allows the contact element to be moved from the contact-off position to the contact-on position, and possibly vice versa.Typically, an electrically conductive bridging element is moved with the (rigid) transmission element to short-circuit or electrically separate the two contact elements.

[0008] Furthermore, the protective switching device has a tripping mechanism that typically allows it to open automatically in the event of a fault current or overcurrent. The tripping mechanism includes, for example, a solenoid that electromagnetically moves a plunger.

[0009] According to the invention, the protective switching device has a second (optionally rigid) transmission element that is connected to the first connecting element via a first joint. The second (rigid) transmission element can, for example, be a rocker element that rocks or pivots at the first joint. The second transmission element or rocker element thus has, for example, an arm on each side of the joint, which interacts with a further element.

[0010] Furthermore, the protective switching device has a third (optionally rigid) transmission element, which is connected to the second transmission element via a second joint and has a push button at its free end (the end opposite the second joint). For example, the second joint connects an arm of the rocker-shaped second transmission element to one end of the third rigid transmission element. The push button is used for manual actuation of the protective switching device. The protective switching device can be actuated linearly using the push button. Pressure can be applied to the push button with a finger, which moves the third rigid transmission element in the direction of pressure. The push button may be guided linearly within a housing of the protective switching device. However, guidance can also be indirect via the third transmission element.

[0011] The second joint is held stably in a joint-in position by means of a first cam and can be moved to a joint-out position by means of the same cam. The first cam thus serves to restrict the degrees of freedom of the second joint as desired. For example, the second joint has a pin or guide pin that is guided in the cam. The cam can have different paths. For example, the second joint is guided from the joint-out position to the joint-in position by a different path than when moving from the joint-in position to the joint-out position. The paths may also partially overlap. In some cases, however, the cam may only have a single path. The cam can be designed as a groove-and-track, in which the (possibly closed) cam path is formed as a groove. A corresponding pin of the second joint can then be guided in the groove.

[0012] An end section, or free end, of the third transmission element, opposite the second joint and containing the push button, performs a linear movement when the second joint moves from the joint-off position to the joint-in position. The end section where the free end of the third rigid transmission element is located carries the push button. Therefore, the end section with the push button performs a linear movement when the second joint moves from the joint-off position to the joint-in position and vice versa. This makes it possible to transmit a linear push motion to the second transmission element (e.g., a rocker) via the third rigid transmission element.

[0013] A section of the second transmission element located diametrically opposite the first joint to the second joint can be fixed in a section-off position and a section-on position by the release mechanism. For example, the section of the second transmission element located diametrically opposite the first joint to the second joint is the other arm of the rocker element that is not connected to the third transmission element. The release mechanism can restrict the movement of this other arm of the rocker element, or more generally, the corresponding section of the second transmission element. For example, the release mechanism can restrict the movement of the second transmission element by means of a positive locking mechanism. In particular, it can prevent the second transmission element from unintentionally sliding from the section-off position to the section-on position.For example, a magnetically movable plunger of a solenoid in the release mechanism can prevent or permit the aforementioned movement. Only in the section-on position would it then be possible for an operator to move the closing mechanism to close the contact assembly by pressing the push button. For this purpose, the push button's movement is transmitted via the third transmission element to the second transmission element and from there to the first transmission element. The latter is part of the closing mechanism and can move a bridging element of the contact assembly to close the contacts. This advantageously allows a linear movement to be used to switch the protective switching device on or off.

[0014] In one embodiment, the linear movement of the push button causes the second joint to move linearly from the joint-off position to the joint-in position. The linear movement of the push button is thus converted into a linear movement of the joint, resulting in virtually no energy loss. Such a conversion can be reliably achieved by the third transmission element.

[0015] According to another embodiment, the first transmission element of the locking device is exclusively linearly movable, so that the contact element performs a linear movement between the contact-on position and the contact-off position. For example, the first rigid transmission element, together with a bridging element of the contact element, forms a T-shaped structure. This structure can be rigid in itself and move linearly along its central section. When the T-shaped structure is raised, the contacts open, and when it is lowered, the contacts close. The linear movement of the contact element can be generated by the linear movement of the push button, with the second transmission element acting as a lever. Depending on the leverage, the force applied to the push button for the contact element can thus be increased accordingly.

[0016] Alternatively, the first transmission element of the locking device is pivotable, and the contact device has a shaft attached to the first transmission element. When the first transmission element pivots, this shaft rotates towards the contact-on or contact-off position. For example, a bridging element is attached to the rotatable shaft, allowing it to rotate with the shaft into different positions. A first position corresponds, for instance, to the contact-on position, and a second position to the contact-off position. Rotating the bridging element electrically connects or disconnects the contacts of the contact device. In this case, the first transmission element can be pivotally mounted on the shaft, so that a linear movement of the first joint of the second transmission element can be converted into a rotational movement of the shaft.

[0017] In a further embodiment, the first joint moves linearly within a second cam track when the first transmission element of the locking device moves the contact device from the contact-on position to the contact-off position. Specifically, the second cam track can only permit movement of the first joint in the main extension direction of the first transmission element. The two extreme positions in the linear cam track can be assumed by the first joint in the off position and in the on position of the protective switching device.

[0018] In a further embodiment, a first spring is arranged on the first (rigid) transmission element and, in the section-on position of the section of the second rigid transmission element, presses the contact device via the first (rigid) transmission element into the contact-on position. In particular, the first spring can be tensioned in the on position of the protective switching device (contact device in the contact-on position and section of the second transmission element in the section-on position), while it is relaxed in the off position of the protective switching device (section of the second transmission element in the section-off position). "Relaxed" can also be understood as a state corresponding to a lesser tension than in the "tensioned" state (i.e., not completely relaxed).

[0019] Furthermore, a second spring can be arranged at the second joint, which preloads it in the direction of linear movement in the joint-engaged position. This means that in the joint-engaged position, a force is exerted on the second joint by means of the second spring, and this force can be used, for example, by the first cam mechanism to hold the second joint in position (joint-engaged position). In particular, the second spring can also generate the force that resets the push button or counteracts manually applied pressure.

[0020] Furthermore, a third spring can be arranged on the third (rigid) transmission element, biasing this third transmission element perpendicular to one direction of linear movement. For example, the push button, including the third transmission element, is moved linearly downwards. The third spring engages the third transmission element and exerts a force perpendicular to the linear movement or the third transmission element. The third spring does not need to be positioned perpendicular to the third transmission element for this to occur. Rather, it is sufficient if a component of the force of the third spring is perpendicular to the linear movement or to the third rigid transmission element. This allows for suitable cam guidance.

[0021] In a further embodiment, a stop is provided on the section of the second rigid transmission element, against which the section is pressed when the release device is in a triggered state. This means, for example, that the free end of the rocker element (second transmission element) has been released by the release device and therefore requires a defined stop to limit its range of motion. In this way, the movement of the second joint can be transmitted to the first joint in a defined manner.

[0022] According to another embodiment, in a blocking state, the release mechanism blocks the second transmission element in a section-off position, so that the contact-on position is inaccessible to the contact device. For example, the free section of the second transmission element is held between the stop and a plunger of the release mechanism. In this blocking position, for example, a bridging element of the contact device attached to the first transmission element cannot reach the contact elements even when the push button is fully depressed and the second joint is in the joint-on position. This prevents the protective switching device from being unintentionally switched on again.

[0023] In another embodiment, the first cam section has a first, second, third and fourth groove section arranged one behind the other, forming a closed groove (fourth groove section opens into first), wherein the first groove section runs in a direction of the linear movement of the push button or second spring, the second groove section connects to the first groove section at a first connection point and forms a local extremum with respect to a direction of the linear movement of the push button for the joint position at a second connection point with the third groove section, and the fourth groove section is connected to the third groove section at a third connection point and to the first groove section at a fourth connection point.

[0024] The four groove sections of the cam profile thus define a closed path that the second joint follows when the protective switching device is switched on and off again. Specifically, the second joint moves along a different path of the cam profile when switched on than when switched off. When the protective switching device is switched on, the second joint initially moves from one end (joint-off position) of the first groove section to the other end of the first groove section. Subsequently, the second joint, possibly driven by spring force, moves into the second groove section. This section forms an angle with, for example, the subsequent third groove section, the vertex of which represents a local extremum (e.g., a local maximum) with respect to the direction of the linear movement of the push button or the second spring.Since the push button, including the third transmission element, is pressed by the second spring in the direction of linear movement, the second joint is pressed into the second connection point (engagement position) between the second and third groove sections. There, the second joint remains without external influence. If the push button is pressed again, the second joint moves along the third groove section from the joint-engagement position to the third connection point. Subsequently, the second joint moves back along the fourth groove section to the fourth connection point on the first groove section and, if necessary, further into a recessed section of the first groove section (joint-out position).

[0025] This initial setup allows for a stable on-state and a stable off-state of the protective switching device.

[0026] The fourth groove section of the first cam can be arc-shaped. This allows the second joint to initially gain momentum when the push button is reset and then, if necessary, use the corresponding energy against the spring force of the second spring to move into the joint's off position or the off position of the protective switching device.

[0027] As mentioned above, the connection point between the first and fourth groove sections can optionally be located not at the end of the first groove section. In this case, a blind section is formed at the end of the first groove section, where the groove terminates. A stable hinge-off position (switch-off position of the protective switching device) can be implemented there.

[0028] In a further embodiment, the first, second, and third groove sections are each straight, while the first and second groove sections are arranged at an acute angle to each other. These straight groove sections ensure low mechanical resistance, allowing the second joint to be pushed through the cam with minimal force. The acute angle ensures that the push button, after reaching its lowest point, returns to its original position with a satisfying tactile feedback before reaching the detent point or the joint's engaged position.

[0029] In another embodiment, the first and second connection points are at the same height with respect to the direction of linear movement. This has the advantage that, for example, the push button, when entering the "on" position, must haptically assume the same lowest position as when leaving the "on" position.

[0030] For use cases or application situations that may arise during the procedure and are not explicitly described here, it may be provided that, according to the procedure, an error message and / or a request for user feedback is issued and / or a default setting and / or a predetermined initial state is set.

[0031] Regardless of the grammatical gender of a particular term, persons with male, female or other gender identities are included.

[0032] The present invention will now be explained in more detail with reference to the accompanying drawings, which show: Fig. 1 a schematic view of an embodiment of a protective switching device with a push button in the on position; Fig. 2 the protective switching device of Fig. 1 in the triggered off position; Fig. 3 the protective switching device in the switched-off position; Fig. 4 the protective switching device in the blocking position; Fig. 5 a perspective view of a backdrop for the second joint; Fig. 6 a schematic view of a contact device with a rotatable bridging element in the on position; Fig. 7 the contact facility of Fig. 6 in the off position; and Fig. 8 a schematic sketch of a multi-pole protective switching device with push button.

[0033] The exemplary embodiments described in more detail below represent preferred embodiments of the present invention.

[0034] Fig. Figure 1 schematically shows an embodiment of a protective switching device with a push button. The protective switching device has a contact assembly 1, which in turn has two contact elements 2. The two contact elements 2 can be short-circuited by a bridging element 3 of the contact assembly 1. For this purpose, the bridging element 3 touches both contact elements 2. The contact assembly then assumes a contact-on position. In this example, the bridging element 3 is movable in the vertical direction (y-direction).

[0035] Furthermore, the protective switching device has a closing device 4 with a first, optionally rigid, transmission element 5. The first transmission element 5 can be a rod, a lever, or the like. In the present example, it is (rigidly) connected at one end to the bridging element 3. If the first transmission element 5, for example, moves in the y-direction, the bridging element 3 makes (essentially) the same movement.

[0036] Optionally, the first transmission element 5 is length-compressible. For this purpose, the first transmission element 5 can have a first spring 6 which applies the corresponding contact force in the contact-on position of the bridging element 3. For example, the spring force also acts in the y-direction.

[0037] At the end of the first transmission element 5 opposite the bridging element 3, there is a first joint 7. The first joint 7 connects the first transmission element 5 to a second transmission element 8. The second transmission element 8 can be rigid and represent a rocker element. For this purpose, it has two opposing arms 81 and 82. The first joint 7 is located, for example, in the middle of the two arms 81 and 82. The first joint 7 can be guided in a (second) cam 9. This second cam, or its guide path 9, can extend linearly in the y-direction. In the switched-on position of Fig. 1 The first joint 7 is located at the lower end (at least in the lower half) of the second cam 9. The second transmission element 8, for example, assumes a horizontal (x-direction) position here.

[0038] At one end or end section of the arm 81 of the second transmission element 8, there is a second axis or a second joint 10. The second joint 10 rotatably connects the second transmission element 8 to an end section of a third transmission element 11. The third transmission element 11, like the second transmission element 8, can be rigid and, for example, formed by a rod or a lever. By way of example, the third transmission element extends vertically in its longitudinal direction, i.e., in the y-direction. At the end of the third transmission element 11 opposite the second joint 10, there is a push button 12. It is, for example, vertically guided and movable within a housing 32. Preferably, the push button 12 is pivotally connected to the third transmission element 11.

[0039] A pin or guide pin of or on the second joint 10 is guided by a first cam 13. In Fig. In section 5, this first backdrop 13 is shown in perspective in a realization form. The first backdrop 13 is in Fig. Figure 5 is shown purely as an example and can also take other forms. The essential point is that the cam ensures a stable joint-on position 14 and a stable joint-off position 15, in which the protective switching device is accordingly in the on position or the off position. The exemplary first cam 13 has a closed groove for this purpose, consisting of four groove sections arranged one behind the other: first groove section 16, second groove section 17, third groove section 18, and fourth groove section 19. The respective groove sections are connected to each other at corresponding connection points.Thus, a first connection point 20 connects the first groove section 16 with the second groove section 17, a second connection point 21 (corresponding to joint-in position 14) connects the third groove section 18 with the second groove section 17, a third connection point 22 connects the fourth groove section 19 with the third groove section 18, and a fourth connection point 23 connects the first groove section 16 with the fourth groove section 19.

[0040] The first groove section 16 runs vertically here (y-direction) and has a pocket section 24 at its end opposite the first connection point 20. The joint-out position 15 can be located in this pocket section 24.

[0041] The first connection point 20, the second connection point 21, and the third connection point 22 form an isosceles triangle as an example. The apex of this triangle, namely the second connection point 21, lies at the top in the y-direction.

[0042] The fourth groove section 19 runs in an arc from the third connection point 22 to the fourth connection point 23. The four groove sections 16, 17, 18 and 19 form a closed path that the second joint 10 can follow from the joint-out position 15 to the joint-in position 14 and back to the joint-out position 15.

[0043] As seen in conjunction with Fig. As can be seen from 5, the second joint 10 is located in the first backdrop 13 in the joint-in position 14.

[0044] Extending from the third transmission element 11, a second spring 25 is symbolically arranged here, which counteracts a force exerted on the push button 12. It also ensures that the push button 12 returns to its original position and holds the second joint 10 in the joint-in position 14 or in the joint-out position 15.

[0045] Furthermore, a third spring 26 is arranged laterally on the third transmission element 11, which can exert a force component perpendicular (negative x-direction) on the third transmission element 11 and thus also on the joint 10. This third spring 26 ensures that the second joint 10 is pressed into the second groove section 17 at the lower end of the first groove section 16, i.e., at the first connection point 20, and after leaving the joint-in position 14, further into the third groove section 18. Thus, the second joint 10 must use the fourth groove section 19 to return to the joint-out position 15, resulting in the second joint 10 completing a closed path.

[0046] As will be shown below, the mechanism (switch lock) for closing and opening the contact elements 2 is actuated by the single push button 12. All necessary requirements can thus be implemented, namely switching on, switching off, free release, and blocking the switching on.

[0047] At the free end of the in Fig. On the right arm 82 of the second transmission element 8 is a release device 27. It has, for example, a lifting magnet 28 and a plunger 29 movable by it. The plunger 29 is movable, for example, in the x-direction. In the extended state, the plunger 29 blocks, for example, a vertical movement (y-direction) of the free end of the arm 82 of the second transmission element 8. In the switched-on position of the protective switching device according to Fig. For example, the plunger 29 prevents the arm 82 from moving upwards, which is why the first joint 7 assumes a low position, so that the bridging element 3 can be pressed onto the contact elements 2 when the push button 12 is pressed downwards (negative y-direction).

[0048] Furthermore, the protective switching device has a stop 30 vertically above the plunger 29. If necessary, the second arm 82 of the second transmission element 8 can be blocked between the stop 30 and the plunger 29 (compare Fig. 4).

[0049] To switch on the protective switching device, the push button 12, via the third transmission element 11, pushes the second transmission element 8 (rocker) downwards against the contact force of the first spring 6. This, in turn, pushes the bridging element 3 downwards onto the contact elements 2 via the first transmission element 5. The contact points are thus closed, and an electrical connection is established between the contact elements 2.

[0050] During this movement sequence, a guide pin of the second joint 10 is pressed downwards in the first cam 13 and then, by a force from the third spring 26, to the left into the joint-in position 14. The push button 12 is thus secured and cannot return to its initial (off) position. The plunger 29 of the solenoid 28 prevents the rocker arm or the second transmission element from rotating.

[0051] Fig. 2 shows the protective switching device of Fig. 1 in a tripped state. The protective switching device is therefore in a switched-off position. The individual components are already in connection with Fig. 1 explained, so that here as well as in connection with the Fig. 3 and Fig. 4. A further detailed description can be omitted.

[0052] As in the on position of Fig. Here too, the push button 12 is in an "on" position relative to the housing 32. The release device 27 has triggered, for example, due to a fault current or an overcurrent, and has retracted the plunger 29. As a result, the right arm 82 of the second transmission element 8 is no longer held in the lower position by the plunger 29, but is pushed upwards to the stop 30. This causes the rocker, i.e., the second transmission element 8, to tilt, and the second joint 10 is pushed in the cam 13 from the joint-on position 14 to the third connection point 22 (compare Fig. 5) Simultaneously, the first joint 7 moves upwards in the second cam 9 (e.g., into the upper half of cam 9). This also causes the first transmission element 5 to move upwards (y-direction), so that the contact device opens. This means that the contact device or bridging element 3 is in the contact-off position, in which the two contact elements 2 are no longer connected to each other.

[0053] By actuating the solenoid 28 into its off position, the locking mechanism between the solenoid 28 and the rocker (second transmission element 8) is released, allowing the force of the first spring 6 to act and open the contact points of the contact device 1. Consequently, the force of the third spring 26 can also act and push the guide pin or the second joint 10 to the left out of the joint-in position (detent position). Thus, the push button 12 can be pushed upwards into the off position by the force of the second spring 25. However, release can also occur if the push button 12 is blocked.

[0054] Fig. Figure 3 shows the protective switching device in an off position. This means that the protective switching device is switched off and the push button 12 is pressed upwards (y-direction) out of the housing 32. This task is performed by the second spring 25, which is now in its relaxed state. During this upward movement, the second joint 10, or rather its guide pin, has moved from the third connection point 22 through the fourth section 19 into the recessed section 24 of the first groove section 16 and is now in the joint-off position 15 (see Figure 3). Fig. 5) In this process, the left arm 81 of the second transmission element 8, as well as the first joint 7, has also moved upwards. The first joint 7 is thus located at the upper end or upper half of the second cam 9. The contact device 1 remains unchanged compared to the triggered state of Fig. 2 in the contact-off position, so that the contact elements 2 are not connected to each other. The right arm 82 of the second transmission element 8 also remains at the stop 30.

[0055] Manually switching off the protective switching device from the on position of Fig. Step 1 is activated by pressing push button 12 again. This causes the third transmission element 11 to be pushed to the left by the force of the third spring 26. This pushes the guide pin or the second joint 10 out of the detent position (joint-engage position 14) in the guide track 13, allowing it to move upwards along the fourth groove section 19 in the guide track 13. The contact elements 2 are then opened by the force of the first spring 6.

[0056] Fig. Figure 4 shows the protective switching device in its blocked position. The extended plunger 29 of the release mechanism 27 prevents the right arm 82 of the rocker arm, or the second transmission element 8, from moving downwards. As a result, the second joint 10, or its guide pin, cannot reach the first contact point 20 in the first cam 13 (guide cam). Consequently, the second transmission element 8, including the first joint 7 and the first transmission element 5, remains too high, preventing the contact device 1 from closing.

[0057] Therefore, when the solenoid 28 is moved from its off position to the on position (plunger extended, i.e., to the left) in the off position of the protective switching device, the contact elements 2 are prevented from closing. The push button 12 can be pressed, but its travel is insufficient to close the contacts.

[0058] Fig. Figure 6 shows an alternative embodiment in which the contacting device 1' is designed with a shaft 31. The bridging element 3 is fixedly connected to the shaft 31 and is therefore rotatable. Fig. 6 the contact device 1' is in an on position, i.e. in a contact-on position. This means that the two contact elements 2 are short-circuited by the bridging element 3.

[0059] The first transmission element 5 is arranged eccentrically on the shaft 31. Therefore, a linear up-and-down movement of the first joint 7 (in the Fig. 6 and Fig. 7 (not shown) is converted into a rotary motion of shaft 31.

[0060] In Fig. 7 The contact device 1' is in the off position, i.e., the contact-off position. The shaft 31 is rotated, which is why the bridging element 3 is moved away from the contact elements 2. The contact elements 2 are no longer short-circuited, and the protective switching device is in the off position. This contact-off position of the contact device 1' would also be in the tripped state according to Fig. 2, in the switched-off state according to Fig. 3 and in the blocked state according to Fig. Take 4.

[0061] The inventive mechanism of the protective switching device with push button can be used not only for single-pole devices, but also according to Fig. 8 can also be used for multi-pole devices (e.g., four-pole devices). In Fig. Figure 8 shows an example of a four-pole device. Four bridging elements 3 are attached to the shaft 31, which can be rotated with the shaft 31 to engage the corresponding contact elements 2. The bridging mechanism is described in the preceding embodiments.

[0062] In contrast to the previous examples, in the example of Fig. The lifting magnet 28 or the plunger 29 is arranged transversely to the rocker or to the second transmission element 8. The operating principle remains the same.

[0063] The above embodiments show how a protective switching device according to the invention can be equipped with a push button in order to reduce the operating space for the protective switching device. Reference symbol list 1 Contact device 2 Contact element 3 bridging element 4 Locking device 5 first transmission element 6 first spring 7 first joint 8 second transmission element 9 second backdrop 10 second joint 11 third transmission element 12 pushbuttons 13 first backdrop 14 Joint-One Position 15 Joint-Out Position 16 first groove section 17 second groove section 18 third groove section 19 fourth groove section 20 first liaison point 21 second liaison point 22 third liaison point 23 fourth liaison point 24 bag sections 25 second spring 26 third spring 27 Triggering device 28 lifting magnets 29 pestles 30 strikes 31 wave 32 cases

Claims

[1] Protective switching device with - a contact device (1) in which an electrical connection between two contact elements (2) is provided in a contact-on position and in which there is no electrical connection between the two contact elements (2) in a contact-off position, - a locking device (4) with a first transmission element (5), by means of which the contact device (1) can be moved from the contact-off position to the contact-in position, and - a triggering device (27), characterized by - a second transmission element (8) connected to the first transmission element (5) via a first joint (7), - a third transmission element (11) which is connected to the second transmission element (8) via a second joint (10) and has a push button (12) at its free end, - the second joint (10) is stably held in a joint-on position (14) by means of a first link (13) and is movable into a joint-off position (15) by means of the first link (13), - the free end of the third transmission element (11) with the push button (12) performs a linear movement when the second joint (10) is moved from the joint-off position (15) to the joint-on position (14), - a section of the second transmission element (8) which is located diametrically opposite the first joint (7) to the second joint (10) can be fixed in a section-off position and in a section-in position by the triggering device (27). [2] Protective switching device according to claim 1, wherein by linear movement of the push button (12), the second joint (10) is moved linearly from the joint off position (15) to the joint on position (14). [3] Protective switching device according to claim 1 or 2, wherein the first transmission element (5) of the closing device (4) is exclusively linearly movable, so that the contact device (1) performs a linear movement between the contact on position and the contact off position. [4] Protective switching device according to claim 1 or 2, wherein the first transmission element (5) of the locking device (4) is pivotable, and the contact device (1) has a shaft (31) which is hinged to the first transmission element (5) and which is set in rotational movement in the direction of the contact-on position or the contact-off position when the first transmission element (5) is pivoted. [5] Protective switching device according to one of the preceding claims, wherein the first joint (7) moves linearly in a second link (9) when the first transmission element (5) of the closing device (4) moves the contact device (1) from the contact-on position to the contact-off position. [6] Protective switching device according to one of the preceding claims, wherein a first spring (6) is arranged on the first transmission element (5) and, in the section-on position of the section of the second transmission element (8), presses the contact device (1) into the contact-on position via the first transmission element (5). [7] Protective switching device according to one of the preceding claims, wherein a second spring (25) is arranged on the second joint (10), which prestresses it in the joint-on position (14) in the direction of the linear movement. [8] Protective switching device according to one of the preceding claims, wherein a third spring (26) is arranged on the third transmission element (11) and prestresses it perpendicular to a direction of the linear movement. [9] Protective switching device according to one of the preceding claims, wherein a stop (30) is arranged in the section of the second transmission element (8), against which the section is pressed when the triggering device (27) is in a triggered state. [10] Protective switching device according to one of the preceding claims, wherein the triggering device (27) in a blocking state blocks the second transmission element (8) in a section-off position, so that the contact-on position is not accessible for the contact device (1). [11] Protective switching device according to one of the preceding claims, wherein the first gate has a first, second, third and fourth groove section (16 to 19) which are arranged one behind the other and form a closed groove, wherein the first groove section (16) runs in the direction of the linear movement of the push button (12), the second groove section (17) adjoins the first groove section (16) at a first connection point (20) and forms a local extreme value with the third groove section (18) at a second connection point (21) with the third groove section (18) with respect to a direction of the linear movement of the push button (12) for the joint-on position (14), and the fourth groove section (19) is connected to the third groove section (18) at a third connection point (22) and to the first groove section (16) at a fourth connection point (23). [12] A protective switching device according to claim 11, wherein the fourth groove portion (19) is arcuate. [13] Protective switching device according to claim 11 or 12, wherein the fourth connection point (23) between the first and fourth groove portions (16, 19) is not located at one end of the first groove portion (16). [14] Protective switching device according to one of claims 11 to 13, wherein the first, second and third groove sections (16 to 18) are each straight, and the first and second groove sections (16, 17) are arranged at an acute angle to one another. [15] Protective switching device according to one of claims 11 to 14, wherein the first and second connection points (20, 21) are at the same height with respect to the direction of the linear movement.

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