WO2015181085A1

WO2015181085A1 - Switching device comprising a locking mechanism

Info

Publication number: WO2015181085A1
Application number: PCT/EP2015/061433
Authority: WO
Inventors: Bogdan Zabrocki
Original assignee: Eaton Electrical Ip Gmbh & Co. Kg
Priority date: 2014-05-30
Filing date: 2015-05-22
Publication date: 2015-12-03
Also published as: DE112015002559A5

Abstract

Disclosed is a switching device (1) comprising at least two switching contacts (3, 9), an actuation mechanism (18, 26..48) coupled to said switching contacts (3, 9), and an actuation element (4) coupled to the actuation mechanism (18, 26..48). The switching device (1) further comprises a locking mechanism (24) for locking the switching device (1); in the locking state, said locking mechanism (24) is designed to block the actuation element (4) and/or decouple the actuation element (4) from the first actuation mechanism (18, 26..48). For this purpose, the switching device (1) includes a locking element (15) which acts on the locking mechanism (24) or is part thereof and the position of which is derived directly or indirectly from a position of the switching contacts (3, 19). This makes it possible to lock the locking mechanism (24) when the switching contacts (3, 19) are open/closed and prevents the locking mechanism (24) from being locked when the switching contacts (3, 19) are closed/open - even when the actuation element (4) is in an OFF position/ON position. Concretely, the locking element (15) protrudes into the movement path of a first projection (11) of the locking mechanism (24) when the switching contacts (3, 19) are closed/open.

Description

Switchgear with shut-off device

TECHNICAL AREA

The invention relates to a switching device which comprises at least two switching contacts, a first actuating mechanism coupled to the switching contacts for closing and opening the same, an actuating element coupled to the first actuating mechanism for manually actuating the first actuating mechanism and a shut-off device for closing off the switching device. The

Shut-off device has a lock, which by a movement of a

suitable key is actuated. In addition, the shut-off device comprises a first movable projection whose movement with a movement of the

Key is coupled. The shut-off device is formed in its blocking position for blocking the actuating element and / or decoupling of the actuating element from the first actuating mechanism. STATE OF THE ART

Switching devices of the type mentioned, which may for example be designed as a motor protection switch or circuit breaker, are basically known. In this case, the switching device is blocked in a certain position of the actuating element (the toggle), so that this state can not be changed by unauthorized persons. A common application is to block the switching device in the OFF position of the actuator so that work on a circuit following the switching device can safely perform. It is also conceivable, however, that the switching device is locked in the ON position, if, for example, devices must not be turned off unauthorized. An example of such a switching device is disclosed in DE 10 2010 032 035 A1, which discloses a circuit breaker, in particular for low voltages. The circuit breaker comprises a protruding from a housing and

swiveling handle that indicates whether the circuit breaker is on or off. Furthermore, the circuit breaker comprises a lock which blocks a change in the switching state in its closed position. The Locking unit has a slide, which is pushed during locking in the region of the handle and so far hineinerstreckt in this area that it blocks the pivoting of the handle.

A disadvantage of the known switching device is that the actuating element (i.e., the knob or the handle) does not necessarily indicate the switching state of the switching contacts. While this is at a properly functioning

Switching device given in the vast majority of embodiments, but it may be the case that the switch contacts welded together, the

Actuator but still indicating the OFF condition. Dangerous and sometimes life-threatening situations are the result if a switching device is locked in the belief that it has turned off a waiting circuit, but the circuit in question is actually energized.

DE 42 05 288 A1 discloses in this context a switching device with a lock in the form of a pivotable plate, on the lower side of two pins are mounted. When the lock is activated, the first pin triggers the switching device and thus the separation of the switching contacts. If the switch contacts are actually disconnected and are not welded, then a slider releases an opening for the second pin so that the lock can be secured with a lock. On the other hand, if the contacts are welded, said slider blocks the opening for the second pin so that the lock can not be properly pivoted to the locked position. The disadvantage of this is the somewhat cumbersome procedure when shutting off the switching device or the fact that the shut-off device disclosed in DE 42 05 288 A1 can not be integrated into the switching device. Further prior art in connection with the shutting off of a

Switching device is in particular by DE 10 2008 018 892 A1 and the

DE 88 16 037 U1 formed.

DISCLOSURE OF THE INVENTION

An object of the invention is therefore to provide an improved switching device. In particular, the above-mentioned disadvantages should be avoided. This object is achieved with a switching device of the type mentioned, in which

the switching device has an acting on the shut-off device or covered by this barrier, the position of which is derived directly or indirectly from a position of the switching contacts and allows the closing of the shut-off device with open / closed switch contacts and at

closed / open switch contacts - even when the actuator is in an OFF / ON position - prevents

wherein the lock projects with closed switching contacts in the movement path of the first projection.

In this way it is avoided that the switching device a supposed

Switching state is completed, but in fact is not given. Thus, it is also ensured that the switching device is not lockable in the OFF state, when the actuator indicates the OFF condition, the switch contacts but are welded together. Dangerous and sometimes life-threatening

Situations are thus prevented because the switching device can not be locked in the belief that it has switched off a circuit to be maintained, but the circuit in question is actually under voltage. But the reverse case, namely the shut-off of the switching device in the ON-state, when the actuator indicates the ON-state, but the switch contacts are actually open, can be prevented.

Shut-off of the lock is only possible if the lock whose position is derived from the position of the switch contacts, does not protrude into the path of movement of the first projection. Depending on the design of the switching device, this is the case in the ON state or OFF state. The blocking function can be easily integrated into the switching device and can be operated intuitively and without tools.

The position of the lock of the switching device can be derived directly or indirectly from a position of the switching contacts, that is to be removed directly from the switch contacts or an intermediate element, the position of the

Switching contacts transmits to the position of said lock. The term "decoupling" means not only measures that completely separate the function of the actuator from the first

Actuate mechanism (hard decoupling), but also such measures in which the actuating mechanism can indeed be influenced by a movement of the actuating element, but the influence is not so large that a change in a switching state can be effected (soft decoupling).

The invention may also be seen to recognize the need for a switching device which is improved in view of the purpose achieved by the specified measures.

Further advantageous embodiments and modifications of the invention will become apparent from the dependent claims and from the description in conjunction with the figures.

In a particularly advantageous embodiment, the switching device comprises

- a normal auxiliary switch as well

a second actuating mechanism, which comprises said

Normal auxiliary switch with the switch contacts mechanically coupled and a in

Substantially synchronous circuit of the switching contacts and the normal auxiliary switch causes and which acts on said lock.

About a normal auxiliary switch, the position of the switch contacts and thus the switching state can also be queried from a distance. In this embodiment, the often already existing second actuating mechanism for actuating the normal auxiliary switch is also used to move the lock for the shut-off, resulting in a double use of said second

Actuating mechanism results.

It is also particularly advantageous if the shut-off device has a second movable projection whose movement with the movement of the

Key is coupled and which directly or indirectly at first

Actuating mechanism and / or the actuating element acts. In this way, when the switching device is shut off, the first actuating mechanism and / or the actuating element is influenced in such a way that a change in the Switching state of the switching device from the outside is no longer possible. For example, the actuator may be hindered in its movement or even blocked. It is also possible, the actuator of the first

Decouple actuating mechanism, so that movement of the

Actuator has no influence on the switching state of the switching device.

It is also favorable if the movement path of the first projection and / or the second projection is concentric with a rotational movement of the key. Thereby, the movement of the first and / or second projection can be derived in a simple manner from the movement of the key. It is also favorable if the said barrier is designed as a first linearly displaceable slide. Thereby, a movement of the switching contacts can be converted into a favorable for the shut-off linear movement of the lock.

In addition, it is favorable if the second projection protrudes into a recess of a second linearly displaceable slide, which on the first

Actuation mechanism acts. As a result, in particular a rotational movement of the key in a linear movement of the second, to the first

Actuating mechanism acting slide to be converted.

In a further advantageous embodiment of the switching device, the lock is designed as a lock with Schließzwang. Lock-only locks only permit removal of the key after they have been completed. By the proposed measures can now be avoided, for example, that the key is removed in the ON position and the switching device in the exhibition no longer secured, that can be shut off. It is particularly advantageous if the first actuating mechanism for actuating the switching contacts and, if present, the second actuating mechanism for actuating the normal auxiliary switch remain effective even in the absence of the blocking device. This makes it possible, a switching device with a

Retrofit the shut-off device or remove it again when it is no longer needed, without affecting the basic function of the switching device. In a further advantageous embodiment variant, the switching device comprises an actuator coupled to the first actuating mechanism for automatically actuating the actuating mechanism, which causes the switching contacts to disconnect when an overcurrent occurs. In this way, the switching device or an attached electrical device is protected from overloading. For example, such an actuator may be embodied as an electromechanical trigger having a relatively fast response, or as a bimetallic trigger having a slow firing characteristic.

It is also advantageous if the switching device has a multi-part housing in which the switching contacts and the first actuating mechanism arranged and from which the actuating element is at least partially led out, wherein the shut-off device in its blocking position for blocking the actuating element and / or decoupling of the actuating element from the first Actuating mechanism and for locking the housing parts is formed in an inner space formed by these. In this way it is avoided that the switching state of the locked switching device can be manipulated by removing the lid. That is, the lid itself after loosening for example

Fixing screws can not be removed from the main body of the switching device. Dangerous and sometimes life-threatening situations are thus prevented because a disconnected circuit, on which work is performed, can not be re-activated unauthorized by removing the lock.

It is advantageous if at least a part of the housing parts is releasably connected to each other. As a result, in particular the shut-off device for a

be retrofitted existing switching device by a housing part removed, installed the shut-off device in the housing and finally the said housing part is mounted again.

It is also advantageous if the shut-off device is connected to a side of a housing part facing said interior space.

This ensures that the shut-off device can not be removed from the switching device when the housing is assembled. It is also beneficial if the connection by screwing and / or

Locking is made. This allows the individual parts, so for example, a plurality of housing parts with each other or the shut-off on one

Housing part, easily connected to each other. In a further advantageous embodiment of the switching device is the

Shut-off device coupled to at least one rotatable locking element or has such, wherein the blocking element in the locked position of

Shut-off device engages in at least one recess / recess and / or at least one projection in a housing part. In this way, the

Shut-off device and optionally a housing part connected thereto

Shut off locked on the switching device, so that the shut-off device or said housing part can not be removed from the switching device unauthorized even after removing any fasteners (such as screws). In the blocking position of the shut-off device, a blocking element engages in an undercut (for example a recess, depression and / or projection) in the housing. The

Locking element can be rotated or moved, for example, when shutting off.

It is also particularly advantageous if the shut-off device in their

Locking position for decoupling the actuating element from the first

Actuating mechanism is formed. In this way it is avoided that the switching state of the switching device can be changed by moving the actuating element despite actuated shut-off device. Dangerous and sometimes life-threatening situations are thus prevented, since a disconnected circuit, on which work is carried out, not unauthorized by

Moving the actuator can be turned on again. It is also particularly advantageous if the shut-off in their

Locking position is formed in addition to blocking the actuating element. As a result, it can also be recognized on the actuating element that the switching device has been completed. A movement of the actuating element without influencing the switching state of the locked switching device is thus prevented, whereby a mistake about the switching state of the switching device is practically excluded. In addition, it is particularly advantageous

when the first actuating mechanism has a pawl and an actuator acting on this overcurrent, which upon the occurrence of an overcurrent movement of the pawl in a release position and thus separating the

Switch contacts causes, and

when the shut-off device is coupled to the pawl in such a way that locking the shut-off device also causes a movement of the pawl in the release position.

In general, a "pawl" is a component that represents a one-armed (more rarely two-armed) rotatably mounted about a pin short lever, which serves to inhibit another component in its movement. In a switching device, a pawl is specifically used to hold the switch contacts against a force in the ON position. If the pawl is actuated by an actuator, the contacts will snap to the OFF position. For example, such an actuator may be embodied as an electromechanical trigger having a relatively fast response, or as a bimetallic trigger having a slow firing characteristic. In this way, the switching device respectively a connected thereto electrical device in a conventional manner both short and strong

Overload and protected against prolonged and only slight overcurrent. The proposed measures will shut off the

Switching device now essentially the same as the occurrence of an overcurrent. In both cases, the pawl is brought into a release position, resulting in a

Disconnecting the contacts leads, if they are not already separated. A movement of the actuating element remains in triggered switching device with regard to

Switching state usually ineffective, as long as the pawl in the

Trigger position is, for example, because an excessive current load is present. Advantageously, the switching device by the proposed measures with respect to the shut-off or not significantly changed to the actuator when shutting off the first

Decouple actuating mechanism.

It is favorable if the first actuating mechanism is closed

Switch contacts is spring loaded, so moving the latch in the Release position causes the disconnection of the switch contacts. As a result, the switch contacts are released quickly and safely when the latch is released.

It is advantageous

when the first actuating mechanism holds the switch contacts in the ON position of the actuating element by means of the latch located in an operating position directly or indirectly against the force of a spring, and

when a movement of the pawl in the release position causes a spring-driven movement of the actuating mechanism and thus opening of the switching contacts.

As a result, the advantages of the two aforementioned embodiments are combined.

Finally, it is favorable if the second linearly displaceable slider is coupled to the pawl. As a result, the pawl can be influenced by the position of the key of the shut-off device. BRIEF DESCRIPTION OF THE FIGURES

The present invention will be explained in more detail with reference to the exemplary embodiments indicated in the schematic figures of the drawing. It shows:

1 shows an exemplary switching device in an oblique view. FIG. 2 shows the switching device from FIG. 1 with the lid removed; FIG.

Fig. 3 seen the cover of the switching device from obliquely below;

Fig. 4 as shown in FIG. 2, only with removed coupling module of a shut-off device

5 shows the coupling module in exploded view;

Fig. 6 seen the coupling module of Figure 5 obliquely from the front. Fig. 7 seen the coupling module of Figure 5 obliquely from behind.

FIG. 8 shows the coupling module from FIG. 5 at an angle from below; FIG. Figure 9 shows a switching mechanism of the switching device separately from the housing shown obliquely from behind in the ON position.

FIG. 10 shows the shifting mechanism from FIG. 9 obliquely from the front; FIG.

Fig. 1 1 as shown in FIG 9, only in the OFF position. Fig. 12 as Fig. 10, only in the OFF position;

FIG. 13 shows the switching mechanism from FIGS. 9 and 10 directly from behind;

14 shows the switching mechanism from FIGS. 11 and 12 directly from behind;

Fig. 15, the shut-off device with the lock, the key, the

Coupling module and a normal auxiliary switch and a shift lever shown separately;

Fig. 16 is a detail of the arrangement of Fig. 15;

Fig. 17 shows the arrangement of Figure 15 installed in the switching device in the ON position of the switch contacts in a section at the height of the castle.

Fig. 18 as Fig. 18, only in the OFF position of the switching contacts; 19 shows a section through the switching device in the ON state at the level of

Switch contacts;

Fig. 20 is a section through the switching device in the ON state between two

Switch contacts;

Fig. 21 as Fig. 19, only in the OFF state; Fig. 22 as Fig. 20, only in the OFF state;

Fig. 23 as Fig. 19, only in the TRIPPED state;

Fig. 24 as Fig. 20, only in the TRIPPED state;

Fig. 25, the shut-off device and the pawl in an oblique view separately

shown; Fig. 26 as in Fig. 25, only from a different angle;

FIG. 27 shows a detail of the main body of the housing with a receptacle for the coupling module seen obliquely from the left; FIG.

Fig. 28 as Fig. 27, viewed only obliquely from the right and Fig. 29 shows a detail of the switching device with the through the castle

locked housing cover.

DETAILED DESCRIPTION OF THE INVENTION

Fig. 1 shows an exemplary switching device 1 in an oblique view. The switching device 1 comprises a housing 2, connection contacts 3, an actuating element (toggle) 4, as well as a shut-off device, which in this example comprises a lock 5 with a key 6. In addition, Fig. 1 shows a coordinate system x, y, z, which serves to better understand the following figures.

The housing 2 is constructed in several parts in this example and has a

Base 7 and a lid 8. The lid 8 is screwed in this example by means of screws 9 to the base body 7. Of course, any other connection technique instead of or in addition to the screws 9 is conceivable, for example, a locking connection. In addition to the main body 7 and the cover 8, the housing 2 may also have other parts. For example, the main body 7 can again be made up of several parts. 2 shows the switching device 1 now with the cover 8 lifted off, so that the view of the interior of the switching device 1 is revealed. The switching device 1 is shown rotated with respect to FIG. 1 by approximately 180 °, as well as by the

Coordinate system x, y, z is displayed. The lock 5 is mounted in this example on the lid 8 and thus also not shown in FIG. Inside, in particular, a coupling module 10 is shown, whose function will be explained later

Fig. 3 now shows the lid 8 in an oblique view from below. Well visible is the inner part of the lock 5, in particular a first movable projection 1 1, a second movable projection 12 and a rotatable Locking element 13 includes, whose function will also be explained later in detail.

Fig. 4 is similar to Fig. 2, but in Fig. 4, the coupling module 10 of

Shut-off device shown removed from the switching device 1. Fig. 5 shows the coupling module 10 now in an exploded view and rotated by about 180 ° relative to FIG. 4. The coupling module 10 comprises a base part 14, a first slider 15, a second slider 16 and a compression spring 17.

Figures 6 to 8 show the coupling module 10 in the assembled state, Fig. 6 in a similar position as Fig. 5, Fig. 7 in a rotated by about 180 ° to position and Fig. 8 obliquely from below.

FIGS. 9 to 14 show the switching mechanism separately from the housing 2. Fig. 9 shows the switching mechanism while in the ON position obliquely from behind (ie similar to the position shown in Fig. 2), the Fig. 10 in the ON position obliquely from the front (ie similar to that in Fig. 1st 1 in the OFF position obliquely from behind, FIG. 12 in the OFF position obliquely from the front, FIG. 13 in the ON position directly from the rear and FIG. 14 in the OFF position directly from behind.

In addition to the previously discussed contacts 3, the actuator 4, the lock 5, the key 6 and the coupling module 10, the switching mechanism further comprises, in particular, a switching shaft 18, a fixed thereto

Contact piece 19 with a contact pad, a conductor 20, a lock plate 21, a normal auxiliary switch 22 and an associated shift lever 23. Die

Lock plate 21 is used in particular the structure of the first

Actuating mechanism for closing and opening the switch contacts 3, 19th

Furthermore, it can be seen from FIGS. 9 to 14 that the lock 6 and the

Coupling module 10 together form the shut-off device 24. In addition, also fixing screws 25, which serve the attachment of the switching mechanism respectively the lock plate 21 in the housing 2, and a pawl 26 and an actuating point 27 are shown. Finally, Figures 10 and 12 show a pivoting lever 28 which is rotatably mounted about a pivot point 29 in the lock plate 21 and the actuating element 4 carries. In broad terms, the function of the switching mechanism shown in FIGS. 9 to 14 is as follows:

By moving the operating element 4 in the ON position (see Figs. 9, 10 and

13), the switching shaft 18 is rotated so that the contacts arranged on the contact piece 19 and the contacts 3 touch each other and so the current flow between the

Power conductor 20 and the contacts 3 is made possible. At the same time the pawl 26 is engaged and keeps the operating element 4 against a spring force in the ON position. The switching shaft 18 also has a cam on its upper side, which cooperates with the shift lever 23 such that the normal auxiliary switch 22 is actuated in the ON position of the shift shaft 18. About the normal auxiliary switch 22 thus the position of the switching shaft 18 and thus the switching state can also be queried from a distance.

If the operating element 4 is moved to the OFF position (see Fig. 1 1, 12 and

14), the switching shaft 18 is rotated so that the contacts arranged on the contact piece 19 and the contacts 3 open and so the current flow between the conductor

20 and the contacts 3 is disconnected. The pawl 26 remains engaged. By the rotation of the switching shaft 18, the shift lever 23 is moved away from the normal auxiliary switch 22, so that the normal auxiliary switch 22 is not actuated in the OFF position of the shift shaft 18. An actuator, not shown in the figures, or a plurality of such actuators, which become active in the event of an overcurrent, act on the actuation point 27. For example, such an actuator may be embodied as an electromechanical trigger having a relatively fast response, or as a bimetallic trigger having a slow firing characteristic. In this way, the switching device 1, respectively, an electrical device connected thereto is protected in a conventional manner, both from short and heavy overloading as well as from long-lasting and only minor overcurrent.

The named actuator acts on the actuation point 27, that is to say it presses with excessive current load of the switching device 1 against it. For example, the impact armature of an electromagnetic release or the bimetallic element of a bimetallic trigger pushes against the actuation point 27. In this way, the pawl 26 triggered, which in turn the actuator 4 is moved to the TRIPPED position and the shift shaft 18 in the OFF position. The TRIPPED position of the actuator 4 is located approximately in the middle of its ON and OFF position. The shut-off function of the switching device 1 will now be explained with reference to FIGS. 15 to 18:

Fig. 15 shows the shut-off device 24 with the lock 5, the key 6, the coupling module 10 and the normal auxiliary switch 22 and the shift lever 23 shown separately. 16 shows a detail of the shut-off device 24, specifically the first projection 11 in cooperation with the first slider 15. FIGS. 17 and 18 show the arrangement shown in FIG. 15 installed in the switching device 1 in a section at the level of the lock 5. FIG. 17 shows the said arrangement in the ON position of the switching contacts 3, 19 or of the actuating element 4, FIG. 18 in the OFF position thereof. From the figures it can be seen that the moving through the switching shaft 18

Shift lever 23 not only the normal auxiliary switch 22 is actuated, but also the first slider 15. The switching device 1 thus comprises a second

Actuating mechanism 23, the said normal auxiliary switch 22 mechanically coupled to the switch contacts 3, 19 and a substantially synchronous circuit of the switch contacts 3, 19 and the normal auxiliary switch 22 causes and which acts on said lock 15.

In FIG. 17, the first slide 15 is displaced somewhat to the left (ie in the x direction) relative to the state shown in FIG. 18 against the compression spring 17. In the position shown in Fig. 17, the first slider 15 thus protrudes into the range of movement of the first projection 1 1, as well as in the

Figures 15 and 16 is shown. As a result, the key 6 can not turn into the shut-off position.

The switching device 1 thus comprises a barrier 15 acting on the shut-off device 24, the position of which is derived directly or indirectly from a position of the switching contacts 19 and which makes it possible to close the shut-off device 24 with open switching contacts 3, 19 (see also FIG closed Switching contacts 3, 19 prevented, even if the Betatigungselennent 4 should be in an OFF position (see also Fig. 17). The latter case can occur when the actuating element is moved to an OFF position, but the switching contacts 3 and 19 remain in the ON position, for example because they are welded together. By the barrier formed by the first slider 15 is now prevented that the switching device 1 is supposedly shut off in an OFF position, although the contacts 3 and 19 are actually in an ON position, as in the switching devices according to the state of Technique can happen that have a lock, which act only on the actuator 4. The proposed measures can avoid dangerous and sometimes life-threatening situations.

FIGS. 19 to 24, by means of which the switching function of the switching device 1 will be explained in detail in detail, each show a section through the switching device 1 in different switching states. Figures 19 and 20 show the switching device in the ON state, Figures 21 and 22 in the locked OFF state and the figures

23 and 24 in the locked TRIPPED state. Figures 19, 21 and 23 each show a section at the level of the switching contacts 3 and 19. Figures 20, 22 and

On the other hand, 24 each show a section in a plane lying between two switching contacts 3. Figures 19 to 24 show a support lever 30 which is rotatably mounted about a pivot point 31 in the lock plate 21. On the support lever 30 is the

Toggle plate 32 is rotatably mounted about the pivot point 33. In FIGS. 19 and 20, a bolt 34 is in contact with the support lever 30. However, the bolt 34 can also lift off the support lever 30, as shown in FIGS. 21 to 24. About another bolt 35, the toggle plate 32 is connected to the toggle lever part 36, which in turn is pivotally connected to the switching shaft 18. The

Switching shaft 18 is rotatably supported about the pivot point 37 in the housing 2. The

Switching piece 19 is in turn mounted rotatably about a pivot point 38 in the switching shaft 18. On the bolt 35, a first end of a lock spring 39 is further supported, the second end in the pivot lever 28 (see also Fig. 10) is mounted. In addition, a first end of a return spring 40 is mounted on the pivot lever 28, the second end is mounted in the lock plate 21. Both the lock spring 39 and the return spring 40 are formed as tension springs. On the support lever 30 engages in addition to a rocker 42, which is pulled by means of a lock plate 21 mounted on the tension spring 42 upwards. Finally, the pawl 26 rotatably mounted about the fulcrum 43 in the lock plate 21 is held in position by means of the compression spring 44. In addition, a latch lever 45, which is rotatably mounted about the pivot point 46 in the lock plate 21, pressed by means of the torsion spring 47 against the pawl 26. The latch lever 45 has a projection 48, is locked to the support lever 30.

Starting from the OFF position of the switching device 1 shown in Figures 21 and 22, the function of the switching mechanism is now as follows: In the OFF position, the toggle plate 32 is rotated by the lock spring 39 about the pivot point 33 counterclockwise, whereby the toggle lever part 36 pulled up and the shift shaft 18 is rotated clockwise. As a result, the switching piece 19 is lifted from the contact 3 and a circuit interrupted. The fact that the shift shaft 18 is rotated in the OFF position against a stop and the bolt 34 is lifted from the support lever 30, the force of the lock spring 39 is virtually no longer on the support lever, causing it on the relatively weak spring 42 and the rocker 41 is rotated clockwise to the latch lever 45 and there engages the projection 48.

If the actuating element 4 is now moved into the ON position (see FIGS. 19 and 20), the toggle lever plate 32 is about to overcome a dead center

Fulcrum 33 is rotated clockwise, so that the bolt 34 comes to rest on the support lever 30. Furthermore, this is stored around the pivot point 29

Actuator 4 pressed by means of the lock spring 39 against the left stop. On the support lever 30 acts because of the lock spring 39, a torque counterclockwise. The support lever 30 can because of the latching on

However, projection 48 does not dodge upwards, as a result of which the bolt 35 moves downwards and thus presses the toggle lever part 36 downwards and thus rotates the control shaft 18 counterclockwise. As a result, the contact piece 19 is pressed against the contact 3 and the circuit is closed. If an actuator (not shown) acting on the actuation point 27 becomes active in the event of overcurrent, then the latch 26 is moved against the force of the compression spring 44 about the pivot point 43 turned clockwise. As a result, the latching lever 45 can rotate slightly clockwise due to the force of the torsion spring 47, whereby the projection 48 moves to the right and releases the support lever 30. This speeds up due to the force of the lock spring 39, whereby the toggle plate 32 and the

Toggle member 36 are pulled up and the shift shaft 18 in

Turned clockwise. As a result, the switching piece 19 is lifted from the contact 3 and the circuit is interrupted. The actuating element 4 is thereby moved by the lock spring 39 into a TRIPPED position (see FIGS. 23 to 24). The first actuating mechanism 18, 26..48 is closed

Switching contacts 3, 19 so spring-loaded, that a movement of the pawl 26 in the release position, the separation of the switching contacts 3, 19 causes.

In an advantageous embodiment of the switching device 1 this is

Trigger mechanism is also used when shutting off the lock 5, as shown in Figures 25 and 26. When turning the key 4, the second projection 12 is moved, whereby the second slider 16 is pushed in the direction of the lock 5 (ie, opposite to the x-direction) (see also FIGS. 5 to 8, 15 and 16). A projection 49 arranged on the second slider 16 acts on the pawl 26 and rotates it in the clockwise direction, whereby the path for the latching lever 45 is released. Is a shut-off of the lock 5 as possible here only in the OFF position and is the actuator 4 - not welded contacts 3 and 19 provided - also in the OFF position, the position of the support lever 30 does not change for the time being, since this yes as described for Figs. 21 and 22 is rotated by the tension spring 42 and the rocker 41 in a clockwise direction. The position of the switching shaft 18 and the actuating element 4 also do not change.

We moved the actuator 4 in the locked state, which is in principle possible in the illustrated embodiment, the switching device 1 changes from overcoming the dead center of the toggle plate 32 in the TRIPPED state (see Figs. 23 and 24). The position of the switching shaft 18 remains unchanged, that is, the switching element 19 remains in the OPEN position. Also, moving the actuator 4 in the ON position does not change anything, since the support lever 30 when triggered rockets up and closing the contacts 3 and 19 prevented. The blocking of the lock 5 thus causes substantially the same as the activation of an attacking at the triggering point 27 actuator in case of overcurrent. The latch 26 is thus moved in closing the lock 5 in a very similar manner in the release position, as is done by an actuator in the presence of an overcurrent. That is, the shut-off device 24 is (here via the second slider 16) coupled to the pawl 26 such that a

Blocking the shut-off device 24 also causes a movement of the pawl 26 in the release position. In other words, the shut-off device 24 has a second movable projection 12 whose movement (here via the second slide 16) is coupled to the movement of the key 6 and which acts directly or indirectly on the first actuating mechanism 18, 26.

The latch remains closed when shutting off the switching device 1 in the OFF position of the operating element 4 for the time being and is not released until the

Operating element 4 is moved to the ON position. Manipulation attempts on the actuating element 4 are advantageously completed in this way

Switching device 1 prevents. Advantageously, a switching device needs due to the

proposed measures are not or not significantly changed when a shut-off device 24 of the type mentioned is to be used

Of course, it is also conceivable, in principle, that as an alternative to the

proposed procedure or alternatively the actuator 4 is blocked by means of the lock 5 in the OFF position. Will that be

Actuator 4 blocked when shutting off the lock 5 in addition to the movement of the pawl 26, so even leads a violent movement of the

Actuator 4 not to accidentally turn on the switching device. 1 Another advantageous measure is presented in FIGS. 27 to 29. In this case, the lid 8 is fixed when shutting off the lock 5 on the base body 7 and then can not be removed by loosening the screws 9 from this.

FIGS. 27 and 28 show a detail of the main body 7 of the

Housing 2 with a receptacle 50 for the coupling module 10. In the base body 7, a recess 51 and a projection 52 are provided, which when shut off Lock 5 cooperate with the blocking element 13. Specifically, the blocking element 13 engages in the blocking of the lock 5 in the recess 51 and in the projection 52, so that the lock 5 and thus the lid 8 can not be lifted off the base body 7. This is only possible again when the blocking element 13 is rotated by unlocking the lock 5 in the OPEN position.

FIG. 29 shows a detail of the switching device 1, which shows the lock 5 mounted in the cover in cooperation with the recess 51 and the projection 52. FIG. 29 shows the LOCK position of the lock 5 or of the locking element 13. It can be seen clearly that the

Lock 5 and thus the lid 8 can not be lifted off the main body 7 due to the cooperating with the recess 51 and the projection 52 locking element 13.

By connecting the shut-off device 24 on a side facing the interior of the housing 2 side of a housing part 8 ensures that the shut-off device 24 can not be removed from the switching device 1, when the housing 2 is assembled. The connection of the housing parts 7, 8 can be made for example by screwing and / or locking. Due to the detachable connection of the housing parts 7, 8 in particular the shut-off device 24 can be retrofitted for an existing switching device 1 by the cover 8 removed, the shut-off device 24 installed in the main body 7 and

Finally, the lid 8 is mounted again. It is advantageous if, the first actuating mechanism 18, 26..48 for actuating the switch contacts 3, 19 and - if present - the second actuating mechanism 23 for actuating the normal auxiliary switch 22 remain active even in the absence of the shut-off device 24. This makes it possible to retrofit a switching device 1 with a shut-off device 24, or to remove it again when it is no longer needed, without affecting the basic function of the switching device 1 is affected. In the figures, the shut-off device 24 has a rotatable blocking element 13, which in the blocking position of the shut-off device 24 into the recess 51 and engages the projection 52 in the housing part 7. Equally conceivable, of course, would be the use of a (linear) displaceable blocking element 13.

In summary, a switching device 1 is realized by the proposed measures 1, the

comprises at least two switching contacts 3, 19,

one with the switch contacts 3, 19 coupled first

Actuating mechanism 18, 26..48 for closing and opening the same,

a coupled to the first actuating mechanism 18, 26..48

Actuator 4 for manually actuating the first

Actuating mechanism 18, 26..48 and

a shut-off device 24 for completing the switching device. 1

In one embodiment, which is shown particularly clearly in FIGS. 15 to 18, is

the shut-off device 24 in its blocking position for blocking the

Actuator 4 and / or decoupling of the actuating element 4 from the first actuating mechanism 18, 26..48 formed,

and the switching device 1 comprises an acting on the shut-off device 24 or covered by this lock 15, whose position from a position of the

Switching contacts 3, 19 is derived directly or indirectly and the closing of the shut-off device 24 at open / closed switch contacts 3, 19 allows and closed / open switch contacts 3, 19 - even if that

Actuator 4 is in an OFF position / ON position - prevented.

In a further embodiment, which is shown particularly clearly in FIGS. 27 to 29, the switching device 1 comprises a multi-part housing 2, in which the components necessary for the function of the switching device 1 are accommodated. The shut-off device 24 is in its blocking position for blocking the actuating element 4 and / or decoupling of the actuating element 4 from the first actuating mechanism 18, 26..48 and for locking the housing parts 7, 8 formed in an inner space formed by this. In a further embodiment, which is particularly clearly shown in Figures 25 and 26, the shut-off device 24 is in its blocking position to Decoupling of the actuating element 4 from the first actuating mechanism 18, 26..48 formed.

The mentioned features can be combined in any combination. In particular, it is conceivable that the shut-off device 24 is formed in its blocking position for decoupling the actuating element 4 from the first actuating mechanism 18, 2Θ..48 and in addition to blocking the actuating element 24. As a result, it can also be seen on the actuating element 4 that the switching device 1 has been completed, since this can not be moved. A mistake about the

Switching state of the switching device 1 is therefore practically excluded. If the actuator 4 still violently moved, so this has no effect on the switching state of the switching device 1, since the actuator 4 at

shut off switching device 1 from the first actuating mechanism 18, 26..48 is decoupled.

Finally, it is noted that the switching device 1 is not necessarily shown to scale and therefore may have other proportions.

Furthermore, the switching device 1 may in reality also comprise more or fewer components than shown. Location information (for example, "top", "bottom", "left", "right", etc.) are based on the respective figure described and are to be adapted in a change in position of the switching device 1 mutatis mutandis to the new situation. Finally will

noted that the above embodiments and developments of the

Combine invention in any way.

LIST OF REFERENCE NUMBERS

1 switching device

2 housings

3 (connection and switching) contact

4 actuating element (toggle)

5 castle

6 keys

7 basic body

8 lids

9 screw

10 coupling module 1 1 first projection

12 second lead

13 rotatable blocking element

14 base part

15 first slide

16 second slider

7 compression spring

18 shift shaft

19 switching element (switching contact) 20 current conductors

21 lock plate

22 normal auxiliary switch

23 shifter

24 shut-off device

25 fixing screws 26 pawl

27 actuation point

28 pivot lever

29 pivot point

30 support levers

31 pivot point support lever

32 toggle plate

33 pivoting toggle 34 bolt

35 bolts

36 toggle part

37 Fulcrum Switch shaft 38 Fulcrum switch piece

39 Lock spring

40 return spring

41 seesaw

42 tension spring

43 pivoting pawl

44 Compression spring latch

45 Locking lever 46 Pivot lock lever

47 torsion spring latch lever

48 projection latch lever

49 projection second slider

50 Recording for coupling module

Claims

claims

1 . Switching device (1) comprising

at least two switching contacts (3, 19),

- One with the switch contacts (3, 19) coupled first

Actuating mechanism (18, 26..48) for closing and opening the same,

a coupled to the first actuating mechanism (18, 26..48)

Actuator (4) for manually actuating the first

Actuating mechanism (18, 26..48) and

- A shut-off device (24) for closing the switching device (1), wherein the shut-off device (24) comprises a lock (5) which is actuated by a movement of a matching key (6), wherein the shut-off device (24) has a first movable projection (1 1) whose movement is coupled to a movement of the key (6), and wherein the shut-off device (24) in its blocking position for blocking the actuating element (4) and / or decoupling the actuating element (4) from the first actuating mechanism (18 , 26..48),

characterized,

in that the switching device (1) comprises a lock (15) acting on or included in the shut-off device (24), the position of which is dependent on a position of the

Switching contacts (3, 19) is derived directly or indirectly and the closing of the shut-off device (24) with open / closed switch contacts (3, 19) allows and closed / open switch contacts (3, 19) - even if the actuator (4 ) in an OFF position / ON position - prevents and

that the lock (15) with closed / open switching contacts (3, 19) in the path of movement of the first projection (1 1) protrudes.

2. Switching device (1) according to claim 1, characterized by

a normal auxiliary switch (22),

- A second actuating mechanism (23), which said

Normal auxiliary switch (22) with the switch contacts (3, 19) mechanically coupled and a substantially synchronous circuit of the switching contacts (3, 19) and the normal auxiliary switch (22) causes and which acts on said lock (15).

3. Switching device (1) according to any one of claims 1 or 2, characterized in that the shut-off device (24) has a second movable projection (12) whose movement with the movement of the key (6) is coupled and which directly or indirectly the first actuating mechanism (18, 26..48) and / or the actuating element (4) acts.

4. Switching device (1) according to one of claims 1 to 3, characterized in that the movement path of the first projection (1 1) and / or second projection (12) is circular arc concentric with a rotational movement of the key (6).

5. Switching device (1) according to one of claims 1 to 4, characterized in that said barrier is designed as a first linearly displaceable slide (15).

6. Switching device (1) according to one of claims 3 to 5, characterized in that the second projection (12) in a recess of a second linear

slidable slide (16) protrudes, which on the first

Actuating mechanism (18, 26..48) acts.

7. Switching device (1) according to one of claims 1 to 6, characterized in that the lock (5) is designed as a lock with Schließzwang.

8. Switching device (1) according to one of claims 1 to 7, characterized in that the first actuating mechanism (18, 26..48) for actuating the

Switching contacts (3, 19) and - if present - the second actuating mechanism (23) for actuating the normal auxiliary switch (22) even in the absence of

Shut-off device (24) remain effective.

9. Switching device (1) according to one of claims 1 to 8, characterized by a with the first actuating mechanism (18, 26..48) coupled actuator for automatic actuation of the actuating mechanism (18, 26..48), which causes a separation of the switching contacts (3, 19) when an overcurrent occurs.