NO323956B1 - Electromagnetic remote activation switch - Google Patents

Abstract

For bistable contact operation, a cam track (15) is incorporated into the surface of the slide (7). The cam follower is a peg (16) engaging the track. The peg is fixed to a rocker (17), mounted to pivot parallel to the upper surface of the slide.

Description

This invention relates to an electromagnetic remote activation switch which at least comprises a stationary contact and a monostable movable contact which works together with it, where the movable contact is arranged on a slider and can thus be moved in relation to the stationary contact and likewise in relation to a magnetic system which comprises a drive coil and an armature which can be moved with the help of this, and where the magnetic system is connected to the pusher and so that this is pushed by means of a return spring in the direction towards a first coupling position.

Such remote activation switches can easily be made in two different versions, and these two differ from each other in terms of the connection conditions. On the one hand, monostable switches of this type are known which, by means of the return spring, can be held both in a first switching position and in a second such position, but only as long as a sufficiently high voltage is applied to the drive coil. Such switches can often be called relays or protection switches.

However, bistable remote actuation switches (which are also called surge switches) can have two switching positions to choose from, both stable, when the drive coil is de-energized. For switching from one to the other switching position, a voltage application is then needed which causes a current surge in the drive coil.

From the patent literature, reference should be made to US patent 4,404,444, which describes a pressure switching mechanism in which a housing with electrical connection rails is arranged. Another essential component in this mechanism is a pusher which can be displaced in its longitudinal direction in a recess in the housing. On the side surfaces, the pusher has contact plates that can provide electrical contact between the connection rails. A coil spring (coil spring) that surrounds the pusher and with one end rests against a shoulder on this, while with its other end rests on the front of the housing, pushes the pusher out from this housing. On the upper side of the pusher, a heart-shaped opening has been machined which can just as easily be called a slide (see fig. 2) and which cooperates with a double L-shaped "stop device" in such a way that the device's one, upward-facing flange acts as a pivot and lies stored in a bore in the house. The other flange of the device extends downwards and forms a pin which engages in the slide (see fig. 4). By cooperation between the device and the slide, the pusher can assume its two stable positions when displaced in the longitudinal direction as a result of operation. Such a switch can be relatively easily converted into a monostable switch by simply removing the stop device.

From FR-A-2 014 488 a corresponding electromagnetic switch is known which has a magnetic coil, an L-shaped yoke and a flap armature which is tiltably supported on this. The armature displaces a coupling lever which extends parallel to the longitudinal axis of the magnet coil and carries a pin. Parallel to the lever, there is a pusher that presses on contact springs with its free end and includes a recess in the form of an equilateral, right-angled triangle that has a step machined in the hypotenuse area. The pin engages in this triangle. On the side of the pusher that faces the magnetic coil, a latch arm has been inserted that can tilt about an axis and is connected to the pusher. This arm has a tongue on the friend which lies in the triangular recess. On the other side of the pusher there is a further arm which, in the area of the recess on its side, has an inclined plane that leads into it. A bistable switching takes place in the following way: When the armature is tightened, the pin in the step comes into contact and displaces the pusher downwards. Thereby, the tongue of the ratchet lever comes under an attachment point on the spool body's flange and, due to the biasing of the lever, is swung to the rear of this point by means of the spring, so that the pusher is hooked in this position. When the anchor is relieved, the pin slides along the lower limiting surface on the inclined plane and finally reaches the position shown in fig. 2, in the upper section of the recess. When the anchor is tightened again, the pin slides along the upper limiting surface on the inclined surface and thereby comes into contact with the rivet lever, which turns and thereby triggers the hooking of the tongue with the attachment point. The clutch slide is thereby released and can be moved upwards again. The pin eventually comes back to rest in the step, as shown in fig. 3 in FR-A1-2 014 488.

Based on this background technology, it is a goal of the invention to arrive at an electromechanical remote activation switch of the type indicated at the very beginning, but where a bistable coupling is achieved with as few components as possible and, moreover, components that can be kept simple. Furthermore, such a bistable switch must be able to be rebuilt very easily into a corresponding monostable switch.

According to this invention, this object is achieved by an electromagnetic remote activation switch which at least comprises a stationary contact and a monostable movable contact which works together with it, where the movable contact is arranged on a pusher and can thus be moved in relation to the stationary contact, where the pusher is pressed with the help of a return spring in the direction towards the switch's first switching position, where for bistable contact operation a slide is arranged in the pusher's surface and a pin for engagement in this slide, the slide being attached to a rocker which is stored in order to could tilt parallel to the sliding surface that the slide presents, and where the slide has a tip in the direction of displacement of the slide, this tip in a V-shaped manner binds together two separate straight sections in an approximately V-shaped system, characterized by a magnetic system that includes a drive coil and an armature which can be moved by means of this drive coil, the armature with its area in the a second face protrudes into a slot-shaped recess in the pusher and is thus connected to this, where the slide shows two curvatures that merge into their respective straight section and are brought together in the approximately V-shaped structure, that the main part of one of the slide's straight section has a ramp that starts where the curvatures begin, rises in the direction of the tip and ends in an edge that aligns with the edge formed by the approximately V-shaped construction at the second straight section, and that a spring is arranged to tension the rocker in the direction of one of the scenery's two wings. The slide is part of the pusher and therefore does not constitute an additional component in the switch. Since the pusher is often made of plastic by casting, the slide can also be made very easily by adapting the inner wall of the pusher during production by appropriately designing the spray tool. The manufacturing process for the pusher thereby does not complicate the design of the tool, since this must be specially designed in any case. The rocker which is additionally needed and its pin can be made with a shape that is kept very simple and thus constitutes a very easily manufactured component.

The bistable connection of the switch of the invention can be transformed in an extremely simple way into a monostable function, by simply removing the toggle. If it is necessary to manufacture both bistable and monostable remote activation switches, all components in both product types can be manufactured at the same time, i.e. with the same tool and thus very cost-saving.

Only during assembly can you distinguish between bistable and monostable switches by incorporating or excluding the rocker.

It may also be necessary to have a drive coil with a different number of turns, and for this it applies that only short voltage pulses are applied to the current surge coupler, and the coils are therefore designed with relatively high performance to be able to produce a strong magnetic field even with a short voltage pulse, a magnetic field which will be strong enough to ensure the connection reliably. Drive coils in relays, on the other hand, are designed for low power, since they must be energized for a long time.

The drive coils can, despite different numbers of turns, be made identical in terms of their external geometry, so that all other components in the magnet system and the other switch component assemblies can be made the same.

According to a particularly preferred embodiment of the switch of the invention, the slide can be in the form of a heart-shaped recess.

The bistable contact operation can be made very reliable with such a design.

In a further design of the invention, it can be arranged so that the slide has a tip in the displacement direction of the pusher, this tip in a V-shaped manner binding together, in an approximately V-shaped arrangement, two separate straight sections as well as two curvatures that go into their respective section and are brought together in the facility.

In such a designed backdrop, the pin can slide without edging, which leads to a high functional reliability of the switch.

It has been found to be particularly advantageous to use a rocker which is tensioned with a spring in the direction towards one of the two sides of the slide, so that the running path of the pin inside this is provided in a reliable manner.

In this context, it can be arranged so that the spring is designed as a screw pressure spring which at one end lies against the inner wall in a lower part of an enclosing housing for the remote activation switch and at its opposite end lies against the rocker.

Such springs are functionally reliable standard components that do not need separate manufacturing steps, as this means that the technical manufacturing complexity for the remote activation switch of the invention is kept down. Furthermore, such helical compression springs can easily provide sufficient force for the application in question.

In a further development of the invention, in this context, it can be ensured that pin-shaped shapes are arranged on the rocker and the lower part, so that the ends of the spring can be affixed to these.

A lateral swing of the spring is thereby effectively prevented, since such a swing could have led to a disturbance of the correct function of the spring activation switch.

It can also be arranged so that the main part of one of the straight sections in the scenery is equipped with a ramp that starts in the area where the curvatures begin, rises in the direction of the tip and ends in an edge that is flush with the edge formed by the facility in the area of the second straight section.

With this, it is achieved that the pin, despite its bias, cannot run into the straight section in the scenery and which is equipped with the ramp, but ends up in the other straight section in the same. Passage of none of the pins in the screen thus becomes a forced pass-through, so that the exact shape of the screen for this provides the only possible passageway, and this path is particularly low-friction or edge-free.

In a particularly preferred embodiment of the switch of the invention, it can be arranged so that the return spring is designed as a screw pressure spring which with its first end rests against a part of the housing, preferably an intermediate part, while the other end of the spring rests against the pusher.

Such springs are functionally reliable standard components that do not need any separate manufacture, so that the use of such springs keeps the manufacturing costs and the bid for the spring activation switch of the invention down. Furthermore, sufficient forces can be achieved with such screw pressure springs for the application in question.

In this context, pin-shaped shapes can be arranged on the pusher and the housing to which the ends of the return spring can be attached. A lateral deflection of the spring is thus effectively avoided, since such a lateral deflection could interfere with the correct function of the switch.

In a further development of the invention, it can be arranged so that the rocker has two cylindrical shapes that engage in indentations in the remote activation switch's housing, so that these indentations have a significantly larger cross-section than the shapes.

Such storage can be carried out uncomplicated and provides a problem-free functional operation of the switch, especially with little friction.

In accordance with a preferred embodiment of the invention, it can be arranged so that the indentations have a slot shape and are machined into the front sides of two plates that stand at a distance from each other and face the middle part, which plates are formed on the inner wall of the lower part, and where plates in mutual distance is designed on the middle part, as the plates on the lower part and the middle part are arranged flush against each other at the middle part, as this is arranged on the lower part.

It is extremely easy to insert the rocker in such designed indentations, so that the necessary technical assembly for the assembly of the remote activation switch of the invention becomes particularly simple.

DE-A1-37 07 491 describes a flap armature relay. This magnetic system has an armature that acts on linear displaceable operating steps that guide movable coupling contacts designed as contact plates and which interact with stationary coupling contacts. The description further shows that both operating steps are in reality two separate components which are also stored displaceably, but independently of each other.

EP-A2-440 953 describes a reconnection lock in a relay. This applies here only to the relay armature as well as a contact operating element designed as a pusher which can be displaced and which is controlled by the armature. The end of the element facing the armature is assigned two contact springs that carry contact pieces. Arrangements have thus been made for the movable contacts on two connecting sections to be assigned to a single common pusher, but the pusher itself is not suggested to have any removable arm or lever. In the embodiment shown in fig. 3 and 4, contact springs can be kept inside a housing or enclosing cage. From the description, one cannot directly conclude how the contact spring support is arranged as an "intermediate link", but it is nevertheless clear from the drawings that the side walls of such an intermediate piece extend in a straight line.

From JP-A-59 025 135, a multi-pole relay is known whose armature acts on a pusher via a rocker arm, so that the pusher can be moved linearly. This pusher has a total of four openings where rectangular contact plates are inserted, which have contact pieces at both free ends. The contact plates are pressed against the front plate on their respective breakthrough, with the help of a screw pressure spring which is inside this. The lateral limiting surfaces of the breakthrough extend parallel to the displacement direction of the pusher.

It is a further task for this invention to arrive at an electromagnetic remote activation switch of the type indicated at the outset, and where the switch can in particular be easily assembled together. Furthermore, such a switch must also be able to be built up in a simple way from a mainly embodiment which comprises two simultaneously operated connection sections, to a corresponding switch which only has a single such section.

Such a remote activation switch according to the invention thus comprises two connection sections which both have at least one stationary contact and one movable contact which works together with this or its respective stationary contact, the movable contact for its respective connection section being arranged on a

common pusher and can be moved over the stationary contact(s) by means of this pusher, where the remote activation switch further comprises a magnetic system with a drive coil and an armature that can be moved when the drive coil is activated, the armature being connected to the pusher, where the pusher can be pressed against a first coupling position by means of a return spring, whereby the pusher in the area of the movable contacts has two arms which are separated from each other via a slot, and where each arm carries at least one movable contact piece for its respective coupling

ling stretch and which is characterized by at least one section on the first arm, preferably the whole of this arm, is designed as an attachable component which is separated from the other pusher, but can be attached to it.

This makes it possible for the assembly of the remote activation switch to first insert the pusher without the first arm in the lower part of the housing and then the middle part, as this separates the two connecting sections from each other and which can move between the two arms, over the slot. The first arm can then be attached to the other pushers. Thus, a difficult fixing of the middle part in the slot between the arms can be omitted, which is otherwise necessary in known designs in one piece of the first arm, with the other pushing.

Furthermore, by simple removal of the first arm and the electrically conductive components belonging to it for the assigned connection section, a single-pole remote activation switch can be formed which only has a single connection section. If you want to have both two-pole and one-pole switches, all components, including the housing, the magnet system and the pusher for both product types, can be manufactured simultaneously and in the same way, that is, with the same tools and therefore particularly cost-saving. Only during assembly can one distinguish between the single-pole and the two-pole versions of the switch when installing the first arm and the electrical components for the first connecting section.

In a further embodiment of the invention, it can be arranged so that in the arm arranged separately from the other pusher, a dovetail-shaped groove is incorporated into which this first arm can be connected via a correspondingly designed guide on the other pusher.

In this way, the first arm can be attached particularly easily and reliably without additional auxiliary materials, such as adhesives, to the other pushers.

A further task for this invention lies in producing a remote activation switch of an electromechanical type and of the kind indicated at the outset, where the one or the movable contacts can be particularly reliably lifted up from the stationary contacts, also especially when they have come to attach itself by welding.

Such a remote activation switch can thus have at least one stationary contact and a movable contact that works together with the stationary contact and is arranged on a slider so that it can be moved over this stationary contact, and with a magnetic system with a drive coil and an armature that can be moved when the drive coil is activated, the armature being connected to the pusher, which pusher can be pressed in the direction of a coupling position by means of a return spring to hold the movable contact or several such contacts by means of a cage consisting of two side walls as well as cover plates which connects these, with the side walls extending in the displacement direction of the pusher, and where the at least one movable contact is arranged on an approximately rectangular plate which is occupied in the cage between these side walls and is pressed against one of the cover plates by means of a pressure spring arranged inside the cage, and which is characterized by the fact that the inner surfaces of the side walls in the cage extend parallel to each other and form a point vi nkel a at the displacement direction of the pusher.

In the event of a movement of the pusher which leads to the lifting of a movable contact from the corresponding stationary contact, first the inner surfaces of the side walls in the cage along the plate of the movable contact and displaces this normally in the displacement direction of the pusher. Thereby, the movable contact is displaced laterally in relation to the stationary contact, whereby any welds between these contacts are torn up.

It has proven beneficial to keep the size of the acute angle in the range between 3 and 5°, as you then get a sufficiently large displacement between the contacts to be able to tear up any welding together, but where the light guidance in the relative movement between the pusher and the plate of the movable contacts is not significantly affected.

In a further development of the invention, it can be arranged so that the pressure spring is designed as a screw pressure spring which rests with one end against the plate and its other end against one of the cover plates in the cage.

Such springs are functionally reliable standard components that do not need a separate manufacturing sequence, whereby their use does not increase the technical complexity for manufacturing the remote activation switch of the invention. With such standard springs of the screw compression type, you will get sufficient power for the application in question.

In this context, according to a preferred embodiment of the invention, the plate and one of the cage's cover plates can preferably have dome-shaped shapes to which the ends of the compression spring are attached. A lateral movement of the spring which could lead to an influence on the correct function of the switch is avoided in this way.

The patent US 5 260 677 concerns a relay whose magnetic system is very clearly shown in fig. 3, and where it appears that a magnetic core as well as a yoke that extends parallel to this is arranged and is called a field return plate. The flap anchor is on the upper front side of this plate and stored pivotably. The plate is made in one piece with laterally arranged posts which have a certain mutual distance and which extend over the flap anchor.

A further task for the invention is to produce a remote activation switch of the type mentioned at the outset, and where the magnetic system can exert large forces against the armature, regardless of its position.

According to the invention, an electromagnetic remote activation switch has thus been provided which at least comprises a stationary contact and a movable contact which works together with it, where the movable contact is arranged on a slider and can thus be moved in relation to the stationary contact and likewise in relation to a magnetic system which comprises a drive coil and an armature which can be moved with the help of this, and where the magnetic system is connected to the pusher and so that the latter is pressed by means of a return spring in the direction towards a first coupling position, whereby in the inner of the drive coil, a magnetic core is arranged which is in a good conductive connection with a yoke which extends approximately parallel to the coil length axis, the yoke on the front of the armature, in the area of the first front side, is pivotably supported and characterized by the fact that the armature bearing plate is fixed on the side surfaces of the yoke which extends over the front of the yoke and the section of the anchor lying there.

Above these armature bearings, a magnetic flux of relatively high strength can form, regardless of the armature's position, whereby large forces can act on the armature, regardless of its position. This results in good functional reliability of the magnetic system and thus of the entire remote activation switch.

The invention will now be reviewed in more detail, and reference is made to the drawings, where particularly preferred embodiments are shown, as fig. 1 and 2 thus show a remote activation switch according to the invention, with two connection sections with the upper part removed and in oblique view, whereby a movable contact 2 is arranged for each connection section and its connection is made by means of a stationary second current rail 5, fig. 3 shows a preferred embodiment of the electromagnetic remote activation switch of the invention, comprising two connection sections with the upper part removed and in oblique view, whereby two movable contacts 2 are arranged for each connection section, fig. 4 shows the magnet system 8 in such a switch according to the invention and with a pusher 7 in oblique view, fig. 5 shows the same as in fig. 4, but with a rocker 17 in addition, fig. 6 shows the pusher 7 with the rocker in oblique view, fig. 7 shows the same as fig. 3, but where the middle part 21 is separated from the lower part 23 and the rocker 17 is removed, fig. 8 shows the same as fig. 3, but where the pusher 7 is in its second coupling position, and fig. 9 shows an alternative embodiment of the heart-shaped slide 15 which is formed in the pusher.

A remote activation switch according to the invention thus comprises, like already known corresponding switches, at least one connection section. Each such connection section has at least one stationary contact 1 and at least one movable contact 2. These two types of contacts 1,2 work 1 the extent together so that they can open and close/close a connected circuit.

As can be seen from fig. 1, the stationary contact 1 is arranged on a first power rail 3 which ends in its end part 3' in a manner known per se and which is also not shown in the drawings, in a connection terminal. The movable contact 2 is connected to a further, second busbar 5 via a flexible conductor 4, and this second busbar 5 has its corresponding end portion 5' similarly terminated in a connection clamp not shown here.

Instead of the flexible conductor 4, you can also have a third current rail 59 (see Fig. 2) with a small thickness and which thereby becomes flexible to a certain extent. The movable contact 2 is further arranged on a pusher 7 and can be moved by this in relation to the stationary contact 1. A circuit can be connected to the connection terminals, not shown, and it is this circuit that the switch must operate. In particular, the switch of the invention can be connected to a panel or the like, and the switch's enclosing cover or housing can then, in a manner known per se, have a lower part 23 and an upper part which can be mounted on this lower part, but which is not shown in the drawings.

The remote activation switch of the invention is produced in the drawings so that it preferably has two connecting sections which can be operated by one and the same pusher 7. To isolate these sections from each other, the housing also has an internal partition which is here called an intermediate part 21 and which lies between the upper part and the lower part 23 .

All details which are described below as inventive are applicable to an unlimited extent also in the execution of the connecting line according to fig. 1 or fig. 2, regardless of the fact that they are described in the following in connection with the preferred embodiment shown in fig. 3, for such a connection line.

The connection line in fig. 3 has, in contrast to the first mentioned and shown two designs, two stationary contacts 1, and these have a small distance to each other and are arranged on their respective rigid power rails 3, 5. One has two movable contacts 2 which are arranged on a electrically conductive plate 6, as the distance between these two contacts 2 corresponds to the distance between the stationary contacts 1.

The plate 6 is arranged on a pusher 7 - which will be described in more detail below - and this pusher 7 is in connection with both movable contacts 2 and can cause these to move in relation to the stationary contacts 1. A magnetic system is used to move the pusher 7 8. However, the pusher 7 can also be moved by hand, in that it has an operating button 36 on its upper end which projects through an opening in the lower part 23.

The magnet system 8 comprises a drive coil 9 and an armature 10 which can be moved by this. In the embodiment shown in the drawings, a magnetic core 11 is arranged in the interior of the drive coil 9 which, in a magnetically good conductive connection, forms a magnetic path with a yoke 12 which extends approximately parallel to the longitudinal center axis of the drive coil 9. On the front side 61 of this yoke 12, the anchor 10 in the form of a flat plate is stored pivotably in the area at its first front side and thereby forms a so-called flap anchor (see also fig. 4 and 5). The storage is carried out so that the anchor 10 rests with an edge of the front side against the front side 61 of the yoke. Attached to the yoke 12 is a resilient tin strip 62 which projects over the front side 61 and in the direction of the anchor 10 has a bent section 63 over which the anchor 10 grips. With this section 63, the tin strip 62 also acts as an anchor spring.

With its area on the other front side, the anchor 10 projects into a slot-shaped recess 13 in the pusher 7 and in this way is connected to it. The pusher can be moved back and forth in the shown direction of displacement or movement 14, which is indicated by a double arrow, inside the remote activation switch's housing in a bearing therein and can thus be moved in relation to the anchor 10.

A special feature of this magnet system 8 is an armature bearing plate 60 which is arranged on the side surfaces of the yoke 12. They protrude above the front side 61 of this as well as the section of the armature 10 which is located in the area of this front side 61. Above the armature bearing plate 60 will always be, especially also when the anchor 10 is in the raised position shown in fig. 4 and 5 in relation to the magnetic core 10, a relatively strong magnetic flux. Consequently, relatively large magnetic forces can act on the armature 10, which provides a good functional reliability of the magnet system 8.

A return spring 20 also acts on the pusher 7 which moves it into the coupling position shown in fig. 3, under pressure. The return spring is designed as a screw compression spring which is attached with one end to a part of the housing, preferably the intermediate part 21, which part separates the two connecting sections from each other, as already mentioned, while the other end of the spring rests against the pusher 7. In order to obtain a stable contact of the spring 20 against the pusher 7 and the housing (against the intermediate part 21), there are pin-shaped shapes 22 arranged in the areas of the pusher 7 and the housing where the ends of the return spring 20 are attached, so that these ends can be hooked firmly to the pins or shapes 22 ( see also Fig. 7 where such a configuration 22 is arranged on the intermediate part 21).

If a voltage is applied to the drive coil 9, a magnetic field is set up in it, and a force acts on the armature 10. This force is greater than the force exerted by the return spring 20, so that the pusher 7 can be pushed against the pressure effect from this spring.

It also falls within the scope of the present invention and within the protection area of the associated patent claims that the magnetic system 8 can also constructively be structured differently, for example with a shape which means that the armature 10 which can be moved by the drive coil 9, can be displaced in the interior of the winding around the coil, as a stored bolt, as is common, for example, in the case of impact armature tripping at circuit breakers.

In a remote activation switch comprising the components reviewed above, at least a single movable contact 2 will be made in monostable design, that is to say that it can be moved monostable, together with one or possibly more stationary contacts 1, while the return spring 20 pushes the pusher 7 in the direction towards the first switching position and simultaneously with the pusher, at least one movable contact 2.

In order to give the switch a bistable switching mechanism, that is to say a bistable contact operation, a displacement opening has been designed in the surface of the pusher 7, which is here called a slide 15. This slide is preferably designed as shown in the drawings, namely as a stylized heart , but the scenery can also have a different form, as is also evident from the investigation of how the mechanism works. A pin 16 which is arranged on a rocker 17 is guided in this slide 15. The rocker extends parallel to the sliding surface that the slide 15 exhibits, and is stored in the housing of the remote activation switch.

The storage takes place with the help of two cylindrical shapes 18 on the rocker 17 and which engage in indentations 19 in the housing. In fig. 5 shows one of these modifications 18, while the other is not shown in fig. 5, but lies above the rocker's 17 surface. The indentations 19 for receiving cylindrical shapes 18 have somewhat larger dimensions than the shapes 18, so that the rocker 17 can also be moved somewhat normally in the displacement direction 14.

The indentation 19 is preferably not made as fully cylindrical and mutually flush bores at a distance equal to the thickness of the rocker 17, since the installation of the rocker 17 in such bores would then become difficult. Fig. 7 shows how the indentations 19 are machined into the lower part 23 and have a slot-shaped shape. Preferably, these indentations 19 have semi-cylindrical main parts whose diameter is somewhat larger than the corresponding ones of the shapes 18.

Two plates 24 are formed on the inner wall of the lower part 23, where such an indentation 19 has also been incorporated in the front sides facing the middle part 21. The distance between these two plates 24 corresponds to the thickness of the flap 17 in the area of the adaptations 18. The flap 17 is inserted in the distance between the plates 24, whereby the shapes 18 will lie in the indentations 19.

Two plates 24' are also formed on the middle part 21 at a certain distance from each other. The plates 24 and 24' are arranged so that when the intermediate part 21 is placed on the lower part 23, they will extend flush in relation to each other and with their front sides lying on each other or with only a small distance. The indentations 19 on the plates 24 in the lower part 21 are thereby covered by the plates 24' on the middle part 23 and enclose the shapes 18 in the indentations 19.

The heart-shaped slide 15 preferably has an asymmetrical shape, as shown in fig. 1-8. This shape includes a tip 24" in the displacement direction 14 of the pusher 7, as well as straight sections 25, 29 leading into this tip 24". In particular fig. 6 shows how this is, as the straight sections 25, 26 stand at an angle and form a V-shape, so that they are separated from each other by a corresponding V-shaped device 27. To each of these straight sections 25, 29 is connected a curvature 26, 28, so that both of these curvatures merge into each other in the area above the V-shaped device 27. The link 15 and the pin 16 on the rocker 17 thus form a locking device which works in the following way: In the position of the remote activation switch of the invention, which is shown in fig. 3, 5 and 6, the pin 16 is in the tip 24" of the heart-shaped slide 15. The connection line shown in Fig. 3 is disconnected, the movable contacts 2 being lifted up from the corresponding stationary contacts 1.

If a voltage is now applied to the drive coil in this situation, the pusher 7 will be displaced downwards, in the direction shown in fig. 3. During this movement, the pin 16 will first move in the displacement direction 14 down to the tip 24" and then follow the right-hand straight section 25 in the slide 15. The curvature 26 which is connected to this section then leads the pin 16 into the approximately V- shaped plant 27 where it is shown in full line in Fig. 6. During this passage of the pin 16 in the slide 15, the rocker is first moved slightly in the clockwise direction (until the pin 16 reaches the curvature 25) and then tilted back in the opposite direction.

When no voltage is applied to the drive coil 9, the return spring 20 can then push the pusher 7 upwards. The device 27 is then displaced in the direction of the pin 16, until it rests against this device (dotted line position of the pin 16 in the drawing). The pusher 7 can thus no longer return to the position shown in fig. 3, but must be moved to the position shown in fig. 8, where the movable contacts 2 in the connection section shown in fig. 3 and 8 still abut against their respective stationary contact 1 and thus this connection line ends. This second switching position is thus a stable switching position which is also maintained even if there is no current in the drive coil 9, in that no voltage is applied to it.

A movement of the pusher 7 back into the position shown in fig. 3 can, however, take place by applying a new voltage pulse to the coil 9. The pusher 7 is then pressed down again, and the pin 16 enters the curvature 28 on the left side of the slide 15 (see Fig. 6 and point representation of the pin 16). After this voltage pulse has ended, the return spring 20 moves the pusher upwards again, and then the pin is moved over the left straight section 29 back to the tip 24" in the slide 15. The pusher is then back in the coupling position shown in Fig. 3, and the shown connection section is then opened.

The remote activation switch of the invention can, however, be designed differently in relation to this, in that the operation can also be carried out by hand. For this, the pusher 7 has, in a similar way as deduced above, a recess in the lower part 23 through which an operating button 36 is inserted. However, the locking mechanism formed by the pin 16 and the link 15 works in exactly the same way when the pusher is operated by hand.

In order for the pin 16 to always go in the direction reviewed above, anti-clockwise, in the slide track, the following two measures have been taken: First, there is a spring 30 which braces the rocker 17 in the direction of the left wing of the slide 15. With "wing " is understood here in the description and in the associated patent claims as the total of the straight sections 25 and 29 respectively and the associated curvatures 26 and 28 respectively. The biasing of the rocker 17 in the direction of the left wing is to be understood as meaning that it would be completely indifferent if the rocker 17 was moved towards the right wing, by which naturally the curtain 15 would be mirrored in relation to the displacement direction 14 and its axis. The spring 30 is designed as a screw pressure spring in the preferred embodiment and as shown in the drawings, and this spring abuts on one side against the inner wall of the lower part 23 and on its other side against the rocker 17. To keep the spring stably in place correspondingly the return spring 20 as well as against the rocker 17, on this as well as on the lower part 23 there are arrangements 37 in the form of pins, to which the spring ends can be fastened.

The force from the spring 30 against the rocker 17 ensures that the pin 16 is pressed in the direction of the left wing of the slide 15 and thereby takes the position which is drawn with continuous dashed and dotted lines.

One can also get out of it without this spring 30, when its function (the rocker 17 pressed in the direction of the left wing of the slide 15) in another way. This can preferably be carried out by the rocker 17 being arranged somewhat obliquely in relation to the left wing of the slide, whereby the end of the rocker 17 which has the pin 16 is guided towards the left wing with the help of gravity.

In order to prevent the pin after it leaves the tip 24" and enters the left straight section 29, this is equipped at the bottom with a ramp 31 which starts in the curvature 28 and rises towards the tip 24". The ramp 31 ends with an edge 33 which runs flush to a corresponding edge 32 of the facility 27 in the area of the straight section 25. The "foot-side" end of the pin 16 slides when it leaves the tip 24" along this edge 33 of the ramp 31 and can thereby not entering the right section 29, but must go along the edge 32 of the facility 27 into the right section 25.

When the rocker 17 is tensioned in the direction towards the right wing of the scenery 15, the ramp 31 described above must be arranged in the right-hand straight section 25 of the scenery.

An alternative and equally conceivable constructive embodiment of the heart-shaped backdrop 15 is that it is made completely symmetrical, that is to say with identical left and right wings (see fig. 9). The pin 16 will then, after leaving the tip 24", come into contact with a cut 34 for the V-shaped shoulder 27 and is then led arbitrarily to the right 25 or the left straight section 29. After the pin is bent via the curvature 26 or 28, after the end of the voltage pulse on the drive coil 9, it will come to lie in the position marked on the underside of the cut 35. Upon a new displacement of the pusher 7, the pin 16 will touch this cut 35 and will again, depending on whether it was guided in one direction or the other is fed into the right or left curvature 28, and in both cases the pin 16 finally re-enters the tip 24".

Based on the analysis of the function of the screen 15, it is clear that this can also have a different shape than an approximately stylized heart shape, as long as the pin 16 can be stored stably in two holding points with a distance from each other and where the screen 15 can guide the pin with only little friction between these two points under displacement. For example, in connection with the embodiment shown in fig. 9 imagine that the curtain 15 was half-heart-shaped, that is to say that it only includes one of the wings. Such a shape could also have another conceivable design variant, and almost look like a half ellipse. The invention thus not only applies to the embodiments shown in the drawings with heart-shaped cover 15, but different connection lines can be made in many ways, as the drawings are concentrated on a remote activation switch with two such connection lines. In fig. 1-3, however, only a single connection line is shown, and this is arranged in the area between the intermediate part 21 and the not shown upper part of the housing around the switch. The second section lies between the middle part 21 and the lower part 23 and, according to the construction principle, is identical to the first section shown in fig. 1-3.

It can also be ensured that this second connection section has a different connection function than the first. By this it is understood here that when the first connecting section has a closing function (the connecting section is in its first connecting position as shown in fig. 1-3, while the second connecting position shown in fig. 8 is then closed), then the second can connection section must be constructed with an opening function, so that it is closed in the first connection position (fig. 1-3), but opened in the second connection position (fig. 8).

However, the function for both connecting sections is arbitrarily selectable or arbitrarily combinable with each other. Thus, for example, both sections can be designed as closers or both as openers, or one or both can be designed as turners.

The magnet system 8 and the pusher 7 are jointly designed for both connection sections, that is to say that the movable contacts 2 for one connection section are arranged for/on a single common pusher 7 and can be moved by this over the corresponding stationary contacts 1. As can best be seen of fig. 4, the pusher 7 in the area of the movable contacts 2 has two separate arms 41, 42 which are held at a distance from each other via a slot 40. On these arms the movable contact pieces (contacts 2) for the remote activation switch of the invention are arranged, each such arm 41, 42 can guide the individual movable contact 2 or both, for their respective connection length. In the case of a fully assembled housing for the switch, the wall 45 of the intermediate part 21 lies in the area of this slot 40. The arms 41, 42 thus project into the assigned connection section and are separated in the area of the movable contacts 2 from the other connection section at this wall 45 of the intermediate section 21.

A peculiarity of the switch of the invention and its pusher 7 is that the entire first arm 41 is made as a component that is separate from the other pusher 7, but that it can be attached to this other pusher 7. This attachability can in principle be carried out arbitrarily, for for example, the arm 41 can be glued to the other pusher 7.

In a preferred embodiment which is also shown in the drawings, the pusher 7 has a removable, form-fitting fixing of the arm 41.1 the first arm 41 is thus incorporated a dovetail-shaped groove 43.1 the area for the other pusher 7, in which the arm 41 is to be fixed, a guide 44 is designed which, in terms of its cross-sectional shape, corresponds to the groove 43 and is somewhat smaller than this. The arm 41 can be attached to this guide 44 and can thus be attached to the other pusher 7 with good adaptation.

The cross-sectional shape of the groove 43 and the guide 44 can be chosen arbitrarily and, for example, have the hammer shape shown in the drawings. Alternatively to this, both track 43 and guide 44 can have a trapezoidal cross-section, the longer of the parallel side edges of such a trapezoid in the area at the bottom of the track 43 or the corresponding surface of the guide 44, in order to obtain a form-fitting connection between the arm 41 and the other pushes.

As can be seen from fig. 7, when assembling the remote activation switch of the invention, the pusher can first be inserted into the lower part 23, then the middle part 21 can be put on, and then the arm 41 can be stuck on the other pusher 7. A difficult insertion of the pusher arms 41 and 42 in the area between the lower part 23 and the middle part 21 respectively between the upper part and the middle part, can thereby be avoided.

In order to achieve such an easy mountability of the pusher 7 in the switch housing, in contrast to what has been shown in the drawings so far for the entire arm 41, instead only a section of the arm, namely the lower one, can be used to design the section that carries the contact 2, as a separate component from the other pusher 7. The second section of the arm 41 can thereby be made integral with the pusher 7. However, it should be noted that the second arm section, which is thus made integral with the pusher 7, in the first coupling position (fig. 3) for the pusher, still ends on the upper side of the wall 45, so that when assembling the remote activation switch, the wall 45 does not need to be inserted into the intermediate part 21 in the slot 40 between the two arms 41,42.

A further aspect according to the invention lies in the constructive design of the holding mechanism for the movable contact on the pusher 7. As can be seen from fig. 6, the pusher 7 for holding the movable contact 2 has a coupling section with a cage 50. Since the manufactured remote activation switch as shown in the drawings has two coupling sections whose movable contacts 2 - as described above on two arms 41, 42 - each of these will arms 41,42 be replaced by such a cage 50.

The cage 50 has two side walls 51, 52 which extend in the displacement direction 14 of the pusher 7, and the cage also has two cover plates 53 and 54 which connect these side walls together. The one movable contact 2 (see fig. 1 and 2) and the two movable contacts (see fig. 3) respectively are arranged on one or their respective rectangular plate 6, and this plate is occupied between the side walls 51 and 52 of the cage 50. Inside in the cage 50, a pressure spring 55 is arranged which presses the plate 6 against one of the cover plates 53, 54. Which of the two cover plates 53, 54 the plate 6 is pressed against will depend on which coupling function (closing or opening) the relevant coupling section is to fulfill . Is the connection line as shown in fig. 3, namely as a shutter, since the stationary contacts 1 are arranged on the underside of the lower cover plate 54, the plate 6 will precisely be pressed against this lower cover plate. In the event of a movement of the pusher 7 which leads to the closing of the coupling section, the movable contacts 2 will come into contact with the stationary contact 1. Because of this contact, the plate 6 cannot be moved further by further movement of the pusher 7, but this plate will press the compression spring 55 together. The system pressure with which the movable contacts 2 press against the stationary contact will thus be increased by compression of the compression spring 55.

In an embodiment of the connection line as an opener, the stationary contacts 1 lie on the upper side of the upper cover plate 53 on the cage 50, while the plate 6 is pressed against this upper cover plate (see the left first arm 41 in Fig. 6).

The compression spring 55 is preferably designed as a helical compression spring which with its one end rests against the plate 6 and with its other end is supported against one of the cover plates 53, 54 in the cage 50. Alternatively to this, the compression spring 55 can be designed as a leaf spring.

In the design of the pressure spring 55 as a screw pressure spring, according to the preferred embodiment of the remote activation switch and which is shown in the drawings, conformations 56 are arranged on the plate 6 and on one of the cover plates 53, 54 in the cage 50, and on these conformations the ends of the compression spring 55 are suspended . The shapes 56 preferably have a dome shape, but they can also be designed as cylindrical studs.

The inner surfaces 57, 58 of the side walls 51, 52 in the cage 50 extend parallel to each other and form an acute angle a in relation to the displacement direction 14 of the pusher 7. The size of this angle is preferably in the range between 3 and 5°.

As explained above, one therefore has the situation that when the movable contacts 2 abut against the assigned stationary contacts 1, the plate 6 which guides the contact parts 2, in the cover surface 53, 54 of the cage 50 and against which the plate comes into contact, will be lifted up so that the compression spring 55 is compressed.

During a displacement of the pusher 7 and which leads to the lifting of the movable contacts 2 from the assigned stationary contacts 1, these movable contacts will not be lifted from them at first, as the plate and with this the contacts 2 are pressed more against the stationary contacts 1 by means of of the pressure spring 55, whereby the continued movement of the pusher 7 then relaxes this pressure spring and where one of the cover plates 53, 54 in the cage 50 further comes into contact with the plate 6, and only then is this displaced and lifts up the movable contacts 2 from the stationary contacts 1.

During this displacement of the cage 50 and lifting of the contacts, in relation to the plate 6, the inner surfaces 57, 58 of the side walls 51, 52 will be guided along the plate, and due to the angle difference between these inner surfaces in relation to the direction of movement 14 of the pusher 7, the plate 6 comes to to be displaced normally in this direction 14. The movable contacts are thereby guided parallel to the surfaces, with which they come to rest against the stationary contacts 1, during displacement. With this lateral relative movement normally in the displacement direction 14, respectively the lifting movement of the movable contacts 2 in relation to the stationary contacts 1, any smaller welds between these contacts or contact sets 1,2 will be broken up.

In the event of a displacement of the pusher 7, a displacement which leads to contact of the movable contacts 2 against the assigned stationary contacts 1, the movable contacts will first, as described above, rest against the stationary contacts 1, while a continued displacement of the pusher 7 by compression of the compression spring 55 by means of the plate 6, will cause this compression to cause a sliding of the inner surfaces 57, 58 along the plate 6, as this causes a displacement of the movable contacts 2 normally in the displacement direction 14. Since the movable contacts thereby already touching the stationary contacts, they will have a frictional movement in relation to these, which leads to a, if not scraping, then in any case cleaning of the contact surfaces on both contact types 1, 2. This leads to a good electrical contact connection, it will say that the contact resistance can be kept low and this can be maintained throughout the life of the remote activation switch.

Claims (8)

1. Electromagnetic remote activation switch which at least comprises a stationary contact (1) and a monostable movable contact (2) which works together with it, where the movable contact is arranged on a pusher (7) and can thus be moved in relation to the stationary contact (1), where the pusher by means of a return spring (20) is pressed in the direction towards the switch's first switching position, where for bistable contact operation a slide (15) is arranged in the pusher's (7) surface and a pin (16) for engagement in this slide, the slide being attached to a rocker (17) which is supported in order to be able to tilt parallel to the sliding surface that the slide (15) presents, and where the slide (15) has a tip (24) in the displacement direction of the slide (7) (14), as this point in a V-shaped manner binds together two separate straight sections (25, 29) in an approximately V-shaped system (27), characterized by a magnet system (8) comprising a drive coil (9) and a anchor (10) which can be moved using this drive pin le, as the anchor (10) with its area on the other front projects into a slot-shaped recess (13) in the pusher (7) and is in this way connected to this, where the link (15) exhibits two curvatures (26,28) which merge into their respective straight section (25, 28) and are brought together in the approximately V-shaped structure (27), so that the main part of one of the scenery's straight sections (25 or 29) has a ramp (31) which starts where the curvatures (26 and 28) begin, rises in the direction towards the tip (24) and ends in an edge (33) which is flush with the edge (31) formed by the approximate V -shaped facilities (27) at the second straight section (29 or 25), and that a spring (30) is arranged which tension the rocker (17) in the direction of one of the two wings of the curtain (15). 2. Switch according to claim 1, characterized in that the cover (15) is designed with an approximately stylized heart shape. 3. Switch according to claim 1 or 2, characterized in that the spring (30) is designed as a screw pressure spring which at one end lies against the inner wall of a lower part (23) in an enclosing housing for the remote activation switch and at its opposite end rests against the rocker (17). 4. Switch according to claim 3, characterized in that pin-shaped moldings (37) are arranged on the rocker (17) and the lower part (23), so that the ends of the spring (30) can be affixed to these. 5. Switch according to one of the preceding claims, characterized in that the return spring (20) is designed as a screw pressure spring which rests with its first end against a part of the housing, preferably an intermediate part (21), while the other end of the spring lies against the pusher (7). 6. Switch according to claim 5, characterized in that pin-shaped shapes (22) are arranged on the pusher (7) and the housing to which the ends of the return spring (20) are hooked. 7. Switch according to one of the preceding claims, characterized in that the rocker (7) has two cylindrical shapes (18) which engage in indentations (19) in the housing of the remote activation switch, so that these indentations have a significantly larger cross-section than the indentations (18). 8. Switch according to claim 7, characterized in that the indentations (19) have a slot shape and are machined into the front sides of two plates (24) which stand at a distance from each other and face the middle part (21), which plates are formed on the inner wall of the lower part (23), and where plates (24') at a distance from each other are formed on the middle part (21), the plates (24, 24') on the lower part (23) and the middle part (21) respectively being arranged flush against each other at the middle part (21) , as this is arranged on the lower part (23).