DE19532867A1 - Holder for a temperature-dependent switching mechanism - Google Patents

Abstract

The holder has two connection elements (12,13), which accept the switching mechanism (1) between them and which contact different connections, and two contact elements (14,15) electrically connected to the connection elements and to the external connections of the switching mechanism. At least one of the connection elements is arranged to accept different distance pieces (16), which electrically connect the switching mechanism and connection element, between itself and the switching mechanism so that switching mechanisms of different thicknesses can be used.

Description

The invention relates to a holder for a temperature-dependent, preferably encapsulated rear derailleur, with two connection elements, which accommodate the rear derailleur between them and different Electrical connections of the same, and with two Contact elements that are electrical with the connection elements are connected and to the external connection of the rear derailleur serve an electrical consumer.

Such a switch is known from DE 38 17 080 C2.  

Temperature-dependent, enclosed switchgear are in themselves also known. These rear derailleurs are often in temperature guardians are used and serve the temperature of a device to monitor. For this purpose, these rear derailleurs have inside the capsule usually a bimetallic element, which at Über "snap" and exceed a certain temperature hereby releases or closes an electrical contact, whereby Influence on the temperature of the device. In the simplest case, such a rear derailleur with a electrical consumers as a device to be monitored in series switched so that when the predetermined overtemperature is reached the power supply to the electrical consumer is interrupted becomes.

It is well known to use these rear derailleurs with a two design, electrically conductive housing in which a bimetallic snap disc and a spring washer are provided are. The spring washer carries a contact part, which with the Cover part in the system, so that at a correspondingly lower Temperature over the contact part and the spring washer conductive connection between the cover part and the bottom part of the rear derailleur. The temperature of the Rear derailleur, the bimetallic snap disk "snaps" and moves the spring washer such that the electrical Connection between cover part and bottom part is interrupted.

If the rear derailleur consequently in thermally conductive connection with the part to be monitored with regard to heat development of the consumer, the bimetallic snap disc can do so be set at a preselected temperature the consumer's current flow through the consumer Bimetal switch connected in series is interrupted.  

Such switchgear can be self-holding or non-holding be trained. With self-locking rear derailleurs is in everything Usually a PTC element is connected in parallel to the rear derailleur. As long as the overtemperature is not reached and the rear derailleur insofar as it is closed, the consumer current almost flows completely over the bimetal element. Upon reaching the Overtemperature and "snapping" of the bimetal element begins causing a current to flow through the parallel PTC element the PTC element heats up. Because of this heat development the bimetal element is held in the open position.

With non-latching rear derailleurs there is usually none PTC element present, so that the bimetal element again "snaps back" if the device to be monitored changes the switch-off by the switching mechanism has cooled down sufficiently.

In addition to temperature monitoring, the temperature monitors take over thus often other functions, they protect the ver need before excessive current consumption and / or prevent Reactivating the consumer when its temperature has lowered again, which is why the temperature monitor is self-holding be formed. To perform these additional functions parallel and series resistances in the temperature guard integrated.

This type of rear derailleur is often encapsulated. This ensures that the sensitive bimetal element is protected. The electrical connections of this encapsulated Switchgears are usually on opposite Sides of the rear derailleur.  

For external connection of the rear derailleur, it is possible to connect strand directly on the housing or on the connections of the Switchgear to solder. However, this process is labor and therefore expensive and can due to the high soldering temperature damage to the rear derailleur, causing a high Can bring committee.

DE 38 17 080 C2 gives a temperature Monitoring device for shaded-pole motors known, the two connector lugs attached to the field winding point. The known temperature monitoring device exists from an insulating housing, in which one with the first Connector flag of the field winding to be connected Mating connector is housed and in which a parallel to the second connector flag of the field winding Directional connector flag is held. The also in supports the temperature monitor incorporated in the insulating housing directly on the one held in the insulating housing Connector flag from. Furthermore, is in the in the isolation mating connector provided a contact spring molded onto the opposite side of the temperature guardian presses.

This known holder has a relatively complicated structure and is exclusively due to the connection flags of the Shaded-pole motor adapted to the specified connection diagram. Farther Problems can arise that the jammed temperature monitor shakes off, causing unwanted Operational failures of the shaded-pole motor can result. Finally this known holder is only of a certain type adjusted by temperature monitor.

Based on this state of the art, it is the task of present invention, the holder mentioned above to further develop that the holder can be used as universally as possible is.

Another task is to make one as universal as possible To create temperature monitors.

According to the invention, this object is achieved in the aforementioned Holder for a temperature-dependent, preferably encapsulated Switch mechanism solved in that at least one of the connection elements is designed between yourself and the rear derailleur different spacers to accommodate the rear derailleur and electrically connect the one connection element to one another, so that derailleurs of different thicknesses are held can.

The task is also performed by a temperature monitor for one electrical consumer solved a invention Has holder in which a bimetal rear derailleur is added which is with the electrical consumer to be protected is connected in series.

Finally, the task becomes a festival with a spacer laying on a connecting element of the holder according to the invention solved, the spacer is a plate, the is designed in a U-shaped turn of a connector element to be used.

The object on which the invention is based is achieved in this way completely solved.  

With this universal holder you can now do different things Rear derailleurs are held, e.g. B. those with and those without PTC element because these two types of derailleurs have often due to the different number of encapsulated Components of different thickness. Furthermore, that is Rear derailleur held completely solderless by the holder. The Contact elements are arbitrary according to a desired connection diagram configurable. The spacer, which is the one connection element electrically connected to the rear derailleur can be a carrier of various electrical functions. On the one hand there may be a direct electrical connection between the connector element and rear derailleur, on the other hand, discrete Components or entire circuits between the rear derailleur and Connection element can be switched.

It is preferred if the received spacer is on one connector is fixed so that the rear derailleur between the spacer and the other connecting element is held.

The advantage here is that the interposition of the distance piece is solved structurally particularly simple. Farther This measure results in a particularly simple one Assembly, because by fixing the spacer the one connecting element, the spacer in the holder captive, even if the rear derailleur is not yet is inserted. This also eliminates assembly errors avoided because after inserting the spacer the insertion wrong, because too thick derailleurs are not possible. All in all the manufacturing costs are reduced by this measure.  

It is further preferred if at least one of the connecting element and contact element existing pair in one piece from one electrically conductive piece of material is formed.

This measure has the advantage that the holder is constructive is particularly easy because the number of parts is minimized overall is. This also results in a simpler assembly.

It is preferred if the electrically conductive material piece is a flag made of resilient metal. Such flags are thanks to bending techniques, it is particularly easy to constructively match the specified Customizable parameters. The feather quality of the flag creates one secure hold of spacer and / or rear derailleur when united expert assembly of the same. Finally, it is advantageous that such a holder is basically reversible, Incorrect assemblies can therefore be undone.

It is particularly preferred if the spacer assigned flag in the area of their connecting element for Fixing the spacer is bent in a U-shape.

Advantageously, the spacer can easily in the U-shaped bend can be inserted. Such a simple one Working step is easy due to automatic production machine (robot) to accomplish. Especially in manufacturing In countries with high labor costs, this measure leads to enormous cost savings.

It is also particularly preferred if the Spacer associated flag in the area of the U-shaped Bend is provided with a spring nose or bead.  

Here it is also advantageous that the insertion of the distance piece while maintaining a secure hold can be easily accomplished. Even one that occurred Wrong assembly of the necessary reversal of this step is essential easier to accomplish. Finally, with such a Design of the flag - within certain limits - distance Insert pieces of different thickness. This simplifies it of course, the manufacture of the spacers and thus reduced their manufacturing costs. Alternatively, either different flags with different thicknesses U-shaped Bends are provided. As another alternative it is conceivable to use the spacers of different thicknesses at least in the area of its holder by the U-shaped To provide bending with a uniform shape.

It is further preferred if the flags are in the area of the contact element as straight contact flags with a predetermined Connection diagram are formed.

The advantage here is that contact flags are particularly simple are to be produced. Also, the overheating is too protective devices easily with the appropriate recordings for straight contact flags can be equipped if they don't already are.

It is particularly preferred if the holder has an adapter element, preferably a clamp slide with two contacts assigned with which the contact elements can be contacted, and the two further connection elements for external connection of the Derailleur has.  

This already brings with a generic holder, that is without the possibility of accommodating different spacers and thus derailleurs, the significant advantage that a greatest possible flexibility in the external connection of the switch works is achieved. In the simplest case, for example when using it the holder for appropriately designed devices to be protected, can the holder without interposing the adapter element connected to the device to be protected. If one device designed for the holder is not to be protected a corresponding adapter element connected to the holder. The other connection elements of the adapter element to the external Connection of the rear derailleur can now either to the difference be adapted to the most diverse devices, which differentiated the provision Licher adapter elements required. However, it is special Preference to provide an adapter element that is as universal as possible, which with known connection technology to the under various devices can be connected. A special one preferred, such a universal adapter element is as Clamping stone sled, in which the others Connection elements are terminal blocks. Such clamps have that Advantage that z. B. strands of different thickness connected can be.

It is preferred if the adapter contacts element are designed as clamp receptacles in which the Contact flags of the holder can be clamped.

This measure advantageously results in a Particularly simple possibility of connecting the adapter element to the holder.  

It is further preferred if the holder and / or the adapter provide element for connection with each other with locking means is / are.

This advantageously results in a very simple connection technology of adapter element and holder. Of particular advantage it is, however, if this measure is supportive of the measure is provided, the contacts as clamps to train, because this results in an overall very rigid coupling of the adapter element to the holder. On unwanted detachment of the adapter element from the holder so safely avoided.

Overall, it is further preferred if the holder is in one Housing is provided, which is shaped on the inside such that the switchgear is transverse to the direction of its contact can be held clamped or latching.

This already brings with a generic switch, that is without the possibility of different spacers and thus define different rear derailleurs, the considerable Advantage that the rear derailleur is extremely easy in the holder can be used. Such a step is on easy way by means of an automatic production machine to accomplish. This reduces the manufacturing costs. At the same time, it is independent of the bracket through the connection elements a secure hold of the rear derailleur in the housing and thus in the holder. In addition, one such clamping or locking bracket reversible, so that Incorrect assemblies can be undone.

The measure, the clamping or latching bracket in the direction To provide transverse to the contact has the advantage that switching  works of different thicknesses through one and the same housing can be held. If this measure with a keeper should be provided in the only derailleurs more uniform Size must be used, the clamping or locking bracket therefore not necessary across the direction of the rear derailleur Contact can be provided. However, this is independent of the type of holder always an advantage when the common, pill-shaped encapsulated rear derailleurs be used with electrical connections on the flat sides, because a clamping or latching bracket is particularly easy on the round peripheral surface of such a switchgear type is feasible.

Furthermore, it is particularly advantageous to use this measure to combine, the flag associated with the spacer in the area its connecting element to define the spacer U-shaped turn because when combining these two measures can both the spacer and the rear derailleur auto can be inserted into the housing, making it over is surprisingly possible, one with such a holder fully equipped temperature monitors manufacture.

It is preferred if the housing has at least one Inner projection for clamping or latching support of the Derailleur has.

The advantage here is that the locking / clamping support the derailleur is structurally particularly easy to solve. Because by coordinating the thickness and size of the projection constructively the desired strength of the clamping or latching effect can be easily reached.  

It is further preferred if the housing has a hood, on the two a connection element and a contact element having flags are set.

It is preferred if the flags each have a plug element have in a respective plug receptacle of the housing can be anchored. Alternatively, this determination can be made in one Pre-assembly step take place, for. B. by pouring the flags during the injection molding of the hood. This reduces the number of parts to be assembled.

The advantage here is that the flags are attached to the Housing can be realized by a simple plug-in process. As with some of the measures previously described, is a such work step easily through an automatic produc tion machine to accomplish so that the manufacturing cost can be further reduced.

It is further preferred if the housing has a cover for the hood. With such a cover rear derailleur, the spacer and the necessary contacts from environmental influences such as dust or Moisture is largely or completely shielded.

It is preferred if the cover has an inside Has base that when the cover is placed on the hood the rear derailleur transverse to the direction of contacting the switching works and transversely to the direction of the clamping or locking action between Hood and rear derailleur supported.  

By this measure, the rear derailleur in the housing is not settable. This will inadvertently loosen the jamming or latching support of the rear derailleur Hood prevented.

It is further preferred if the spacer with its Switch side facing away from an inner wall of the housing and if the cover has a wall-like projection on the inside has in place when the cover is placed on the hood to the side of the rear derailleur opposite the spacer arrives so that the switching mechanism in the direction of its contact between the spacer resting on the inside wall of the housing and the wall-like projection is fixed.

Another advantage is that the rear derailleur when attached Cover not only in the direction transverse to the contact, but also immovable in the direction of contacting the rear derailleur is fixed in the housing. The rear derailleur is therefore all-round mounted immovably. Even when using the rear derailleur Vibrating devices such as Electric motors etc. is therefore always functional guaranteed.

Overall, it is further preferred if the spacer is made of insulating material, preferably ceramic and when on the plate has a conductor track applied to it which is assigned Connection element with the corresponding connection of the rear derailleur electrically connects.

The advantage here is that the spacer itself by weight forth light and the connection between the connecting element and Connection of the switching mechanism can be carried out in a simple manner can, because the application of conductor tracks on an insulating  Material offers great degrees of freedom with regard to the ladder railway laying as well as the integration of discrete construction elements. In general, it is also conceivable to use the spacer to be made of metal, but such a spacer is Relatively heavy in terms of weight and electrical connection manure technology inflexible.

It is further preferred if the on the spacer applied conductor track through a thick film resistor is formed or has one. Because this leaves a series resistor for switching in a simple way plant for current limitation or for current-dependent switching realize.

With the new spacer, it is preferred if the plate made of an electrically insulating material, preferably ceramic exists and if a conductor track is applied to the spacer is.

The advantage here is that the spacer itself by weight forth light and the connection between the connecting element and Connection of the switching mechanism can be carried out in a simple manner can. Because the application of conductor tracks on an insulating Material offers great degrees of freedom with regard to the conductor track laying as well as the integration of discrete components.

It is preferred if the conductor track through a thick layer resistance is formed or has one. Because this allows a row in front of a simple Realize resistance for the switching mechanism to limit the current.

Finally, it is preferred if the plate is made of an elec trically conductive material.  

This alternative measure has the advantage that the Spacer is easy to manufacture, which makes the produc reduce costs.

Additional features, advantages and possible uses result itself from the description and the accompanying drawing.

It is understood that the above and the following standing features to be explained not only in each specified combinations, but also in other combinations or can be used alone, without the scope of to leave the present invention.

An embodiment of the invention is in the drawing shown and is described in more detail in the following description explained. Show it:

Figure 1 is a schematic cross-sectional view of a temperature monitor equipped with an embodiment of the holder according to the invention from the front.

Fig. 2 is a schematic cross-sectional view of the temperature monitor of Figure 1 from the side.

Fig. 3 is a schematic cross-sectional view of the temperature monitor of Figure 1 in a view from below.

FIG. 4 shows a schematic plan view of a cover of the housing of the temperature monitor from FIG. 1;

Fig. 5 is a schematic side view of the cover of Fig. 4;

Fig. 6 is a side view of a spacer zugeord Neten flag of the temperature monitor of Fig. 1;

Fig. 7 is a side view of a further flag of the tempera guard of Fig. 1; and

Fig. 8 is a schematic cross-sectional view of an adapter element associated with the temperature monitor of Fig. 1.

In Fig. 1 and 2, a temperature monitor 1 for monitoring the temperature of a device, typically shown an electrical load. The temperature monitor 1 comprises a housing with a hood 2 and a cover 3 . Inside the housing, an encapsulated pill-shaped bimetallic derailleur 4 is taken up. Two flags 5 , 6 made of spring metal are also provided on the housing.

The flags 5 , 6 , which are each shown in FIGS. 6 and 7 in a side view, each have a connection element 7 and 8 , a contact element 9 and 10 and a plug element 11 and 12 respectively. The plug elements 11 and 12 are anchored ver in opposite plug receptacles 13 and 14 of the hood 2 . The contact elements 9 , 10 are each formed as extensions of the plug elements 11 , 12 , pass through the cover 3 and protrude from it with the formation of straight contact tabs.

The connection element 7 is essentially L-shaped and is bent perpendicularly from the area of the transition between the plug element 11 and the contact element 9 . The end of the connection element 7 is designed as a suspension fork 15 which contacts a connection 16 provided centrally on one side of the switching mechanism 4 .

The connecting element 8 is also bent from the transition between the plug element 12 and the contact element 10 and extends essentially parallel to the plug element 12 . The connecting element 8 is bent at the end in a U-shape and has a spring nose 17 on the free-standing U-leg.

A spacer 18 made of ceramic material is inserted into the U-shaped bend of the connecting element 8 and extends parallel to the side of the switching mechanism 4 opposite the suspension fork 15 . On the surface of the spacer 18 , a thick-film resistor 19 is formed, which electrically connects the connecting element 8 and the housing of the switching mechanism 4 , which is electrically insulated from the contact 16 of the switching element 4 contacted by the spring fork 15 of the other connecting element 7 .

The thick-film resistor 19 applied to the spacer 18 thus forms a series resistor for the switching mechanism 4 , which fulfills current limiting purposes, etc.

Due to the U-shaped configuration of the connecting element 8 provided with the spring lug 17 , spacers 18 can be accommodated with different thicknesses. This harbors the possibility of using 2 switchgears 4 of different thicknesses in the hood provided with the flags 5 , 6 . Thus, for example, encapsulated switchgear 4 with self-holding, which have a PTC resistor connected in parallel with the bimetallic piece, or flat, encapsulated switchgear 4 without self-holding can be used.

Furthermore, the connection of the switching mechanism 4 can be changed by the spacer 18 . In the embodiment shown, a thick-film resistor 19 is provided as a series resistor, as described above. Alternatively, it is also possible to use other spacers, on which only a simple conductor track is applied, or which are themselves made of electrically conductive material, so that no series resistor is implemented. The arrangement of hood 2 with flags 5 , 6 inserted therein can thus be used universally for different switching mechanisms 4 and different connections thereof.

For reasons of clarity, FIGS. 1 and 2 do not show some structural details of the housing, which will now be discussed with reference to FIGS. 3 to 5.

Fig. 3 shows a schematic cross-sectional view of the hood 2 seen from below. It can be seen that the spacer 18 in the U-shaped configuration of the connector 8 is a feasible and lies flat against an inner wall 20 of the hood 2 . The housing of the switching mechanism 4 used , which in the present case is a round encapsulated switching mechanism (see FIG. 1), lies with its one axial side on the side of the spacer 18 opposite the inner wall 20 with a thick-film resistor 19 applied thereon. In this way, an electrical connection between the connection element 8 and the housing of the switching mechanism 4 is established. The suspension fork 15 of the other connection element 7 presses against the opposite axial side of the switching mechanism 4 , which not only ensures a secure contact between the suspension fork 15 and the corresponding connection 16 of the switching mechanism 4 , but also between the thick-film resistor 19 and the housing of the switching mechanism 4 .

In Fig. 3 it can also be seen that the rear derailleur is clamped radially between a side wall 21 of the hood 2 and a rib 22 projecting perpendicularly from the opposite side wall. This results in a secure hold of the rear derailleur 4 in the hood 2 , regardless of the thickness of the rear derailleur in its axial direction. Switchgear 4 of different thicknesses can thus be used equally in the hood 2 designed in this way.

In Figs. 4 and 5 it can be seen that the cover openings 23, a 3 has laterally 24 for performing the contact elements 9, 10 as well as inside the upwardly projecting socket 25, which is assigned to the side a side support 26 or 27, the have a slightly greater height than the base 25 . When the cover 3 is placed on the hood 2 , the base 25 presses on the switching mechanism 4 with the support of the side carriers 26 , 27 . With the cover 3 completely in place , the rear derailleur 4 is thus not only clamped radially laterally through the side wall 21 or the rib 22 , but is also fixed radially between the base 25 with the side supports 26 , 27 and the bottom of the hood 2 . When the housing is assembled, the rear derailleur 4 is thus fixed radially regardless of its axial thickness such that even strong shaking, such as when using the temperature monitor on an electric motor, there is no danger that the rear derailleur 4 may be offset radially from the connecting element 7 and / or the thick film resistor 19 is electrically separated.

In Figs. 4 and 5 can also be seen that protrudes from the cap 3 inside, parallel to the base 25, a wall-like protrusion 28, namely higher than the base 25 and the side support 26, 27. When the cover 3 is placed on the hood 2 , the wall-like projection 28 slides between the switching mechanism 4 and the connecting element 7 . This firstly ensures that the connecting element 7 is electrically insulated in the region of its L-shaped bend from the housing of the switching mechanism 4 . On the other hand, the switching mechanism 4 is thereby fixed axially. Although the wall-like projection 28 thus axially fixes the rear derailleur 4 , rear derailleurs 4 of different axial thickness can be used, since when using spacers 18 of different thicknesses, the distance between the inner wall 20 and the wall-like projection 28 is always the same.

The wall-like projection 28 is provided on the upper side with a recess 29 so that the suspension fork 15 can contact the connection 16 of the switchgear 4 unhindered.

The axial definition of the arrangement of the switching mechanism 4 and the spacer 18 thus prevents z. B. in use on a shaking electric motor, the switching mechanism 4 is electrically separated by axial offset from the suspension fork 15 and / or the thick-film resistor 19 .

It is obvious that the presently realized by the temperature monitor 1 axial and radial fixing of the switchgear 4 in the housing can also be used when only derailleurs 4 of the same thickness are to be used. In this case - without the series resistor implemented by the thick-film resistor 19 - the use of spacers 18 could be dispensed with. It is obvious that the connection element 8 would then have to be shaped differently. For example, the connection element 8 could in this case be shaped flat L-shaped so that it comes into electrical contact with the housing of the switching mechanism 4 .

In FIG. 8, an adapter element designed as a clamp slide is shown at 30. The clamping block carriage 30 has two clamping block receptacles 31 , 32 for - not shown - clamping blocks of a conventional type. Upper side, the clamping block sled 30 with two clamping receptacles 33, provided of electrically conductive material 34, in which the contact elements 9, 10 of the temperature controller 1 to form an electrical connection between the contact elements 9, 10 and the ent-speaking terminal blocks are clampingly insertable.

It can also be seen in Fig. 8 that the housing of the temperature monitor 1 is formed on the underside with a locking lug 35 which engages in a latching manner with a locking tongue 36 when the clamping stone slide 30 is attached to the temperature monitor 1 . This ensures a secure mechanical connection between the temperature monitor 1 and the clamping stone slide 30 , even if the clamping effect caused by the clamping receptacles 33 , 34 may be sufficient for the mechanical connection in some applications.

Although the adapter element in the present case is designed as a clamping block slide 30 , other types of adapter elements can also be connected to the temperature monitor 1 as required. This can be accomplished in a particularly simple manner, since the contact elements 9 , 10 are designed as straight contact lugs with a fixed connection pattern, which makes the construction of suitable adapter elements simple.

Alternatively, it is of course also possible to provide contact elements 9 , 10 of a different connection type instead of straight contact lugs. It is obvious that the construction of the cover 3 may then need to be modified.

Claims (24)

1. holder for a temperature-dependent, preferably encapsulated switchgear ( 1 ), with two connection elements ( 12 , 13 ) which receive the switchgear ( 1 ) between them and electrically contact different connections thereof, and with two contact elements ( 14 , 15 ) which are electrically connected to the connecting elements ( 12 , 13 ) and for the external connection of the switching mechanism ( 1 ), characterized in that at least one ( 13 ) of the connecting elements ( 12 , 13 ) is designed to have different spacers between themselves and the switching mechanism ( 1 ) ( 16 ) to record, which connect the switching mechanism ( 1 ) and the one connecting element ( 13 ) to one another electrically, so that switching mechanisms of different thicknesses can be held. 2. Holder according to claim 1, characterized in that the received spacer ( 16 ) is fixed to the one connecting element ( 13 ), so that the switching mechanism ( 1 ) is held between the spacer ( 16 ) and the other connecting element ( 12 ). 3. Holder according to claim 1 or 2, characterized in that at least one of the connecting element ( 12 , 13 ) and contact element ( 14 , 15 ) existing pair is integrally formed from an electrically conductive material piece ( 18 , 19 ). 4. Holder according to claim 3, characterized in that the electrically conductive piece of material is a flag ( 18 , 19 ) made of resilient metal. 5. Holder according to claim 2 and 4, characterized in that the spacer ( 16 ) associated flag ( 19 ) in the region of its connecting element ( 13 ) for fixing the spacer ( 16 ) is bent into a U-shape. 6. Holder according to claim 5, characterized in that the spacer ( 16 ) associated flag ( 19 ) is provided in the region of the U-shaped bend with a spring nose or bead ( 20 ). 7. Holder according to one of claims 4 to 6, characterized in that the flags ( 18 , 19 ) in the region of the contact element are formed as straight contact flags ( 14 , 15 ) with a predetermined connection pattern. 8. Holder according to one of claims 1 to 7, characterized in that the holder is assigned an adapter element ( 40 ), preferably a clamping block slide with two contact receptacles ( 44 , 45 ) with which the contact elements ( 14 , 15 ) can be contacted, and which has two further connection elements for external connection of the switching mechanism ( 1 ). 9. Holder according to claim 7 and 8, characterized in that the contact receptacles of the adapter element ( 40 ) are designed as clamping receptacles ( 44 , 45 ) into which the contact tabs ( 14 , 15 ) of the holder can be clamped. 10. Holder according to claim 8 or 9, characterized in that the holder and / or the adapter element ( 40 ) for connection to one another is provided with locking means ( 29 , 46 ). 11. Holder according to one of claims 1 to 10, characterized in that the holder is provided in a housing ( 2 , 3 ) which is shaped on the inside in such a way that the switching mechanism ( 1 ) is clamped or latched therein transversely to the direction of its contact becomes. 12. Holder according to claim 11, characterized in that the housing ( 2, 3 ) has at least one inner projection ( 28 ) for clamping or latching support of the switching mechanism ( 1 ). 13. Holder according to claim 11 or 12, characterized in that the housing ( 2 , 3 ) has a hood ( 2 ) on which two each have a connecting element ( 12 , 13 ) and a contact element ( 14 , 15 ) having flags ( 18 , 19 ) are defined. 14. Holder according to claim 13, characterized in that the flags ( 18 , 19 ) each have a plug element ( 22 , 23 ) which can be anchored in a respective plug receptacle ( 26 , 27 ) of the housing ( 2 , 3 ). 15. Holder according to claim 13 or 14, characterized in that the housing ( 2 , 3 ) has a cover ( 3 ) for the hood ( 2 ). 16. Holder according to claim 15, characterized in that the cover ( 3 ) on the inside has a base ( 30 ) which, when the cover ( 3 ) is placed on the hood ( 2 ), the switching mechanism ( 1 ) transversely to the direction of contacting the switching mechanism ( 1 ) and is supported transversely to the direction of the clamping or latching action between the hood ( 2 ) and rear derailleur ( 1 ). 17. Holder according to claim 15 or 16, characterized in that the spacer ( 16 ) bears with its side facing away from the switching mechanism ( 1 ) against an inner wall of the housing ( 24 ) and that the cover ( 3 ) has a wall-like projection ( 36 ) on the inside, which, when the cover ( 3 ) is placed on the hood ( 2 ), comes into contact with the side of the switching mechanism ( 1 ) opposite the spacer ( 16 ), so that the switching mechanism ( 1 ) in the direction of its contact between the on the housing inner wall ( 24 ) adjacent spacer ( 16 ) and the wall-like projection ( 36 ) is fixed. 18. Holder according to one of claims 1 to 17, characterized in that the spacer is a plate ( 16 ) made of insulating material, preferably ceramic, and that on the plate ( 16 ) a conductor track is applied which the associated connecting element ( 13 ) with the corresponding connection of the rear derailleur electrically connects. 19. Holder according to claim 18, characterized in that the Conductor is formed by a thick film resistor. 20. Temperature monitor for an electrical consumer, with a holder according to one of claims 1 to 19 and a bimetallic switching mechanism ( 1 ) accommodated in the holder, which is connected in series between the contact elements, so that it can be connected in series with the electrical consumer is. 21. Spacer for fixing to a connection element of a holder according to one of claims 1 to 19, wherein the spacer is a plate which is designed to be inserted into a U-shaped bend of the one connection element ( 13 ). 22. Spacer according to claim 21, characterized in that the plate is made of electrically insulating material, preferably ceramic and that on the spacer a conductor track is applied. 23. Spacer according to claim 22, characterized in that the conductor track through a thick film resistor is formed. 24. Spacer according to claim 21, characterized in that the plate is made of electrically conductive material.