EP0813215A1 - Thermostat with a Kapton foil - Google Patents
Thermostat with a Kapton foil Download PDFInfo
- Publication number
- EP0813215A1 EP0813215A1 EP97106210A EP97106210A EP0813215A1 EP 0813215 A1 EP0813215 A1 EP 0813215A1 EP 97106210 A EP97106210 A EP 97106210A EP 97106210 A EP97106210 A EP 97106210A EP 0813215 A1 EP0813215 A1 EP 0813215A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lower housing
- cover part
- housing part
- kapton film
- cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 title claims description 47
- 239000011888 foil Substances 0.000 title 1
- 239000000428 dust Substances 0.000 claims abstract description 8
- 239000011324 bead Substances 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 description 5
- 238000010292 electrical insulation Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 229920000784 Nomex Polymers 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004763 nomex Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
- H01H37/5427—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting encapsulated in sealed miniaturised housing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
Definitions
- the present invention relates to a temperature monitor with a bimetallic switching mechanism which switches at excess temperature, a housing lower part which accommodates the switching mechanism, a cover part which closes the lower housing part and a Kapton film which is arranged between the lower housing part and the cover part.
- the lower housing part and the cover part consist of conductive material, preferably of metal, so that they are very stable and pressure-resistant.
- the bimetal rear derailleur generally comprises a spring washer, which is supported with its edge on the bottom of the lower housing part and carries in the middle a movable contact part which presses it against the inside of the cover part, where a fixed mating contact is arranged.
- a bimetallic snap disk is placed over the movable contact part, which rests on the spring washer without force below its switching temperature.
- Such a temperature monitor is contacted via the cover part and the lower housing part, the current flowing from the cover part via the mating contact and the spring washer to the lower housing part.
- the bimetallic snap disc If the temperature of the bimetallic snap disc is raised to an unacceptable level, it jumps from its convex shape to a concave shape, in which it lifts the movable contact part against the counter contact against the force of the spring washer and thus opens the circuit. For this it is necessary that the cover part is insulated from the lower housing part, which is done by the Kapton film already mentioned.
- the Kapton film also covers the inside of the cover part, so that the bimetallic snap disk, which is supported here with its edge in its high temperature position, cannot produce a short circuit between the cover part and the spring washer.
- Kapton film which can be made of Nomex or Teflon, for example.
- the thickness of the Kapton film is 75 ⁇ m, this thickness is determined by the desired dielectric strength. It should be noted that in the open state, a voltage drops across the Kapton film, which can correspond to the level of the mains voltage.
- the temperature monitors provided with connecting wires are covered with epoxy, silicone or other coating compositions either completely or only on the surfaces where dust, water, oil, etc. can penetrate. These wrappers require additional costly operations.
- the Kapton film which preferably has a thickness which is greater than 100 ⁇ m, ensures a mechanical seal between the lower housing part and the cover part, the cover part preferably having the edge of the Kapton film compresses in their contact area between the edge and a shoulder of the lower housing part.
- the Kapton film can surprisingly not only be used for electrical insulation, but also for sealing between the cover part and the lower housing part. This is due to the fact that the Kapton film is made of a non-porous and non-fluffing material which also has a certain elasticity so that it can be compressed to a certain extent. So far, such a compression of the Kapton film has always been avoided during the final assembly of the known temperature monitors, so that the thickness required for the desired dielectric strength is maintained.
- the Kapton film is preferably designed to be at least 25 ⁇ m thicker than was the case in the prior art so that it can be compressed by this amount (25 ⁇ m) in the contact area between the edge of the cover part and the shoulder of the lower housing part. Outside the support and pressing area, the original thickness of the Kapton film is more or less preserved, so that there is an overall very good seal between the cover part and the lower housing part.
- this section-wise compression of the Kapton film is possible because apart from the required elasticity, it has the further advantage that it does not emit small particles, lint, etc., which get into the interior of the temperature monitor and impair the position there could lead to operational safety.
- the inventors of the present application have recognized for the first time that these properties of the Kapton film, when appropriately designed, enable the Kapton film to be used not only for electrical insulation, but also / alternatively also for sealing against dust and moisture / liquid.
- the thickness is chosen so that the required electrical dielectric strength is achieved.
- the present invention accordingly also relates to the use of a Kapton film, preferably thicker than 100 microns, for dust and liquid-tight sealing between a lower housing part and a cover part of a temperature monitor which closes the latter and which has a bimetallic switching mechanism arranged in the lower housing part and switching at excess temperature has, wherein the lower housing part and the cover part are preferably made of conductive material, particularly preferably made of metal.
- the inside of the cover part has a bead or rib running around the edge, which at least partially constricts the Kapton film in the area of the support area, the bead preferably having a thickness that is greater than 20 ⁇ m .
- the advantage here is that an even better mechanical seal is achieved in that the bead partially penetrates the material of the Kapton film, so to speak, and acts as a kind of sealing lip.
- the choice of the thickness of the Kapton film on the one hand and the thickness of the bead or sealing lip on the other hand can ensure that the required dielectric strength is maintained, while on the other hand a sufficiently high penetration depth can be achieved so that the desired mechanical seal is achieved .
- the measure of the circumferential bead has the advantage, on the one hand, that the choice of the thicknesses described above can ensure that the dielectric strength preserved.
- the force required to press the bead into the Kapton disk is namely less than the force required to compress the Kapton film over the entire contact area.
- the choice of the force required when the lower parts of the housing are crimped together can thus ensure that the bead penetrates the Kapton film and provides the mechanical seal, but that no further, in particular no inadmissible deformation of the Kapton film takes place.
- the temperature monitor 10 comprises a pot-shaped lower housing part 11 and a cover part 12 which closes the lower housing part 11 and which rests on an inner circumferential shoulder 13 of the lower housing part 11.
- the temperature monitor 10 is closed by a flange 14 of the lower housing part 11, which presses the cover part 12 onto the circumferential shoulder 13.
- a bimetallic switching mechanism 15 which is of conventional construction. It comprises a spring washer 16 which carries a movable contact part 17, over which a bimetallic snap disk 18 is placed is.
- the spring washer 16 is supported on a bottom 19 of the pot-shaped lower housing part and thus prestresses the movable contact part 17 against a fixed contact part 20 which is provided on the cover part 12 on the inside 21 thereof.
- the lower housing part 11 and the cover part 12 are made of conductive material, preferably metal, so that a Kapton film 22 is provided which electrically insulates the cover part 12 from the lower housing part 11.
- the temperature monitor 10 is contacted on the one hand via the cover part 12 and on the other hand via the lower housing part 11, as is known per se.
- Fig. 1 it can also be seen that the Kapton film 22 extends over the entire inside 21 of the cover part 12, an opening 23 being provided through which the movable contact part 17 projects.
- the Kapton film 22 has a thickness indicated at 25, which is greater than 100 microns and is preferably 125 microns. Because of this thickness 25, the lid part 12 can be pressed with its edge 27 onto the Kapton film 22 in its support area 28 by the flanged edge 14 so that the support area 28 is at least partially compressed. This compressed contact area 28 is indicated in FIG. 1, but the change in the thickness 25 in this area cannot be seen for reasons of illustration.
- the Kapton film 22 is made of elastic, lint-free material, which is also not porous, a good mechanical seal between the cover part 12 and the lower housing part 11 can be ensured in this way.
- the compression of the support area 28 results in a particularly good mechanical seal so that neither dust nor liquid / moisture can penetrate into the interior of the temperature monitor 10.
- the cover part 12 and the lower housing part 11 are made of electrically conductive material, other constructions are also conceivable in which, for example, the cover part 12 is made of electrically insulating material and the fixed contact part 20 is made like a rivet by the Cover part 12 extends through and is contacted from the outside.
- the Kapton film 22 only takes over the function of the mechanical seal, since electrical insulation is not required.
- the switching mechanism 15 has a temperature below its response temperature, so that it is in the closed state in which it is for a conductive connection between the fixed contact part 20 and thus the electrically conductive cover part 12 and the bottom 19 and thus the electrically conductive lower housing part 11.
- the bimetallic snap disk 18 suddenly snaps from the convex shape shown into a concave shape and is supported on the underside of the cover part 12 with the interposition of the Kapton film 22 in such a way that it counteracts the movable contact part the force of the spring washer 18 lifts off the fixed contact part 20.
- FIG. 2 shows an alternative cover part 12 'which can be used in the new temperature monitor from FIG. 1.
- This alternative cover part 12 ' has in the region of its edge 27 on the inside 21 a bead 31 or a rib, which preferably has a thickness indicated by 32 of greater than 20 ⁇ m of 30 ⁇ m.
- the bead 31 presses into the material of the Kapton film 22 in the manner of a sealing lip in the region of the support area 28 and thus ensures a mechanical seal between the cover part 12 ′ and the lower housing part 11.
- the thickness 25 of the Kapton film 22 and the thickness 32 of the bead 31 are coordinated with one another such that after the flanging edge 14 has been flanged, the remaining thickness of the Kapton film 22 in the area of the bead 31 is still sufficient to ensure the required dielectric strength.
- the thickness 32 is chosen so that the mechanical sealing is particularly good.
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Sealing Devices (AREA)
- Road Signs Or Road Markings (AREA)
- Exposure Control For Cameras (AREA)
- Secondary Cells (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft einen Temperaturwächter mit einem bei Übertemperatur schaltenden Bimetall-Schaltwerk, einem das Schaltwerk aufnehmendem Gehäuseunterteil, einem das Gehäuseunterteil verschließenden Deckelteil sowie einer Kaptonfolie, die zwischen dem Gehäuseunterteil und dem Deckelteil angeordnet ist.The present invention relates to a temperature monitor with a bimetallic switching mechanism which switches at excess temperature, a housing lower part which accommodates the switching mechanism, a cover part which closes the lower housing part and a Kapton film which is arranged between the lower housing part and the cover part.
Derartige Temperaturwächter sind aus dem Stand der Technik bekannt.Such temperature monitors are known from the prior art.
Bei den bekannten Temperaturwächtern bestehen das Gehäuseunterteil sowie das Deckelteil aus leitfähigem Material, vorzugsweise aus Metall, so daß sie sehr stabil und druckfest sind.In the known temperature monitors, the lower housing part and the cover part consist of conductive material, preferably of metal, so that they are very stable and pressure-resistant.
Das Bimetall-Schaltwerk umfaßt in der Regel eine Federscheibe, die sich mit ihrem Rand an dem Boden des Gehäuseunterteils abstützt und in ihrer Mitte ein bewegliches Kontaktteil trägt, das sie gegen die Innenseite des Deckelteils drückt, wo ein fester Gegenkontakt angeordnet ist. Über das bewegliche Kontaktteil ist eine Bimetall-Schnappscheibe gestülpt, die unterhalb ihrer Schalttemperatur kräftefrei auf der Federscheibe aufliegt. Ein derartiger Temperaturwächter wird über das Deckelteil und das Gehäuseunterteil kontaktiert, wobei der Strom von dem Deckelteil über den Gegenkontakt und die Federscheibe zu dem Gehäuseunterteil fließt.The bimetal rear derailleur generally comprises a spring washer, which is supported with its edge on the bottom of the lower housing part and carries in the middle a movable contact part which presses it against the inside of the cover part, where a fixed mating contact is arranged. A bimetallic snap disk is placed over the movable contact part, which rests on the spring washer without force below its switching temperature. Such a temperature monitor is contacted via the cover part and the lower housing part, the current flowing from the cover part via the mating contact and the spring washer to the lower housing part.
Wird die Temperatur der Bimetall-Schnappscheibe unzulässig erhöht, so springt diese von ihrer konvexen in eine konkave Form um, in der sie gegen die Kraft der Federscheibe das bewegliche Kontaktteil von dem Gegenkontakt abhebt und somit den Stromkreis öffnet. Hierzu ist es erforderlich, daß das Deckelteil gegenüber dem Gehäuseunterteil isoliert ist, was durch die bereits erwähnte Kaptonfolie erfolgt.If the temperature of the bimetallic snap disc is raised to an unacceptable level, it jumps from its convex shape to a concave shape, in which it lifts the movable contact part against the counter contact against the force of the spring washer and thus opens the circuit. For this it is necessary that the cover part is insulated from the lower housing part, which is done by the Kapton film already mentioned.
Die Kaptonfolie bedeckt auch die Innenseite des Deckelteils, so daß die sich mit ihrem Rand in ihrer Hochtemperaturstellung hier abstützende Bimetall-Schnappscheibe keinen Kurzschluß zwischen dem Deckelteil und der Federscheibe herstellen kann.The Kapton film also covers the inside of the cover part, so that the bimetallic snap disk, which is supported here with its edge in its high temperature position, cannot produce a short circuit between the cover part and the spring washer.
Es ist bekannt, statt der Kaptonfolie eine andere Isolierfolie zu verwenden, die z.B. aus Nomex oder Teflon hergestellt sein kann. Die Dicke der Kaptonfolie beträgt 75 µm, wobei diese Dicke durch die gewünschte Spannungsfestigkeit bestimmt ist. Es sei darauf hingewiesen, daß im geöffneten Zustand über der Kaptonfolie eine Spannung abfällt, die der Höhe der Netzspannung entsprechen kann.It is known to use another insulating film instead of the Kapton film, which can be made of Nomex or Teflon, for example. The thickness of the Kapton film is 75 µm, this thickness is determined by the desired dielectric strength. It should be noted that in the open state, a voltage drops across the Kapton film, which can correspond to the level of the mains voltage.
Wichtig für den Betrieb des insoweit beschriebenen Temperaturwächters ist, daß kein Staub, keine Feuchtigkeit sowie keine Flüssigkeit in das Innere dieses Temperaturwächters gelangen, um eine Beeinträchtigung der Funktion des Bimetall-Schaltwerkes zu vermeiden. Durch Staub und Flüssigkeit können z.B. ungewünschte Kriechströme oder auch Isolationsbereiche entstehen, die den zuverlässigen Betrieb des Temperaturwächters negativ beeinflussen können. Ferner können Schäden an dem Schaltwerk entstehen.It is important for the operation of the temperature monitor described so far that no dust, no moisture and no liquid get into the interior of this temperature monitor in order to avoid impairing the function of the bimetallic switching mechanism. Dust and liquid can e.g. unwanted leakage currents or insulation areas arise which can negatively influence the reliable operation of the temperature monitor. Damage to the rear derailleur can also occur.
Um die erforderliche Dichtheit zu erreichen, werden beim Stand der Technik die mit Anschlußdrähten versehenen Temperaturwächter mit Epoxy, Silicon oder anderen Umhüllmassen entweder ganz oder aber nur an den Flächen umhüllt, an denen Eindringsmöglichkeiten für Staub, Wasser, Öl etc. vorhanden sind. Diese Umhüllungen erfordern zusätzliche kostenintensive Arbeitsgänge.In order to achieve the required tightness, the temperature monitors provided with connecting wires are covered with epoxy, silicone or other coating compositions either completely or only on the surfaces where dust, water, oil, etc. can penetrate. These wrappers require additional costly operations.
Darüber hinaus ist es bekannt, über die mit Anschlußdrähten versehenen Temperaturwächter Schrumpfschläuche zu schieben, um eine elektrische Isolation zu erreichen.In addition, it is known to slide shrink sleeves over the temperature monitors provided with connecting wires in order to achieve electrical insulation.
Vor diesem Hintergrund ist es Aufgabe der vorliegenden Erfindung, den eingangs genannten Temperaturwächter bei konstruktiv einfachem Aufbau so weiterzubilden, daß auf preiswerte Weise für eine gute Abdichtung zwischen dem Gehäuseunterteil und dem Deckelteil gesorgt wird.Against this background, it is an object of the present invention to further develop the temperature monitor mentioned at the outset with a structurally simple construction in such a way that a good seal between the lower housing part and the cover part is provided in an inexpensive manner.
Bei dem eingangs erwähnten Temperaturwächter wird diese Aufgabe erfindungsgemäß dadurch gelöst, daß die Kaptonfolie, die vorzugsweise eine Dicke aufweist, die größer als 100 µm ist, für eine mechanische Abdichtung zwischen dem Gehäuseunterteil und dem Deckelteil sorgt, wobei das Deckelteil vorzugsweise mit seinem Rand die Kaptonfolie in ihrem Auflagebereich zwischen dem Rand und einer Schulter des Gehäuseunterteils zusammendrückt.In the case of the temperature monitor mentioned at the outset, this object is achieved according to the invention in that the Kapton film, which preferably has a thickness which is greater than 100 μm, ensures a mechanical seal between the lower housing part and the cover part, the cover part preferably having the edge of the Kapton film compresses in their contact area between the edge and a shoulder of the lower housing part.
Die der Erfindung zugrunde liegende Aufgabe wird auf diese Weise vollkommen gelöst.The object underlying the invention is completely achieved in this way.
Die Erfinder der vorliegenden Anmeldung haben nämlich erkannt, daß die Kaptonfolie überraschenderweise nicht nur zur elektrischen Isolation, sondern darüber hinaus auch noch zur Abdichtung zwischen Deckelteil und Gehäuseunterteil verwendet werden kann. Dies ist darauf zurückzuführen, daß die Kaptonfolie aus einem nicht-porösen und nicht-fusselnden Material gefertigt ist, das darüber hinaus eine gewisse Elastizität aufweist, so daß es zu einem bestimmten Maß zusammengedrückt werden kann. Bisher wurde bei der Endmontage der bekannten Temperaturwächter ein derartiges Zusammendrücken der Kaptonfolie immer vermieden, damit die für die gewünschte Spannungsfestigkeit erforderliche Dicke erhalten bleibt.The inventors of the present application have recognized that the Kapton film can surprisingly not only be used for electrical insulation, but also for sealing between the cover part and the lower housing part. This is due to the fact that the Kapton film is made of a non-porous and non-fluffing material which also has a certain elasticity so that it can be compressed to a certain extent. So far, such a compression of the Kapton film has always been avoided during the final assembly of the known temperature monitors, so that the thickness required for the desired dielectric strength is maintained.
Erfindungsgemäß wird die Kaptonfolie vorzugsweise um mindestens 25 µm dicker ausgelegt, als dies im Stand der Technik der Fall war, damit sie im Auflagebereich zwischen dem Rand des Deckelteils sowie der Schulter des Gehäuseunterteils um diesen Betrag (25 µm) zusammengedrückt werden kann. Außerhalb des Auflage- und Drückbereiches bleibt die ursprüngliche Dicke der Kaptonfolie mehr oder minder erhalten, so daß sich insgesamt eine sehr gute Abdichtung zwischen Deckelteil und Gehäuseunterteil ergibt.According to the invention, the Kapton film is preferably designed to be at least 25 μm thicker than was the case in the prior art so that it can be compressed by this amount (25 μm) in the contact area between the edge of the cover part and the shoulder of the lower housing part. Outside the support and pressing area, the original thickness of the Kapton film is more or less preserved, so that there is an overall very good seal between the cover part and the lower housing part.
Dieses abschnittsweise Zusammendrücken der Kaptonfolie ist nach Erkenntnis der Erfinder möglich, weil sie abgesehen von der erforderlichen Elastizität den weiteren Vorteil aufweist, daß sie bei diesem Zusammendrücken keine kleinen Partikel, Fussel etc. abgibt, die ins Innere des Temperaturwächters gelangen und dort zu einer Beeinträchtigung der Betriebssicherheit führen könnten.According to the inventors' knowledge, this section-wise compression of the Kapton film is possible because apart from the required elasticity, it has the further advantage that it does not emit small particles, lint, etc., which get into the interior of the temperature monitor and impair the position there Could lead to operational safety.
Die Erfinder der vorliegenden Anmeldung haben erstmals erkannt, daß diese Eigenschaften der Kaptonfolie es bei entsprechender Auslegung ermöglichen, die Kaptonfolie nicht nur zur elektrischen Isolation, sondern zusätzlich/alternativ auch zur Abdichtung gegenüber Staub und Feuchtigkeit/Flüssigkeit zu verwenden. Die Dicke wird dabei so gewählt, daß die ggf. erforderliche elektrische Spannungsfestigkeit erreicht wird.The inventors of the present application have recognized for the first time that these properties of the Kapton film, when appropriately designed, enable the Kapton film to be used not only for electrical insulation, but also / alternatively also for sealing against dust and moisture / liquid. The thickness is chosen so that the required electrical dielectric strength is achieved.
Die vorliegende Erfindung betrifft demgemäß auch die Verwendung einer Kaptonfolie, mit einer Stärke vorzugsweise dicker als 100 µm, zur staub- und flüssigkeitsdichten Abdichtung zwischen einem Gehäuseunterteil und einem dieses verschließenden Deckelteil eines Temperaturwächters, der ein in dem Gehäuseunterteil angeordnetes, bei Übertemperatur schaltendes Bimetall-Schaltwerk aufweist, wobei das Gehäuseunterteil und das Deckelteil vorzugsweise aus leitfähigem Material, besonders vorzugsweise aus Metall gefertigt sind.The present invention accordingly also relates to the use of a Kapton film, preferably thicker than 100 microns, for dust and liquid-tight sealing between a lower housing part and a cover part of a temperature monitor which closes the latter and which has a bimetallic switching mechanism arranged in the lower housing part and switching at excess temperature has, wherein the lower housing part and the cover part are preferably made of conductive material, particularly preferably made of metal.
Die Vorteile dieser Verwendung wurden oben bereits ausführlich beschrieben.The advantages of this use have already been described in detail above.
In einer Weiterbildung ist es bevorzugt, wenn das Deckelteil an seiner Innenseite eine im Bereich des Randes umlaufende Wulst oder Rippe aufweist, die die Kaptonfolie im Bereich des Auflagebereiches zumindest zum Teil einschnürt, wobei die Wulst vorzugsweise eine Dicke aufweist, die größer als 20 µm ist.In a further development, it is preferred if the inside of the cover part has a bead or rib running around the edge, which at least partially constricts the Kapton film in the area of the support area, the bead preferably having a thickness that is greater than 20 μm .
Hier ist von Vorteil, daß eine noch bessere mechanische Abdichtung dadurch erreicht wird, daß die Wulst sozusagen teilweise in das Material der Kaptonfolie eindringt und als eine Art Dichtlippe wirkt. Durch die Wahl der Dicke der Kaptonfolie einerseits sowie der Dicke der Wulst oder Dichtlippe andererseits kann hier zum einen dafür gesorgt werden, daß die erforderliche Spannungsfestigkeit erhalten bleibt, während andererseits eine genügend hohe Eindringtiefe erzielt werden kann, so daß auch die gewünschte mechanische Abdichtung erreicht wird.The advantage here is that an even better mechanical seal is achieved in that the bead partially penetrates the material of the Kapton film, so to speak, and acts as a kind of sealing lip. The choice of the thickness of the Kapton film on the one hand and the thickness of the bead or sealing lip on the other hand can ensure that the required dielectric strength is maintained, while on the other hand a sufficiently high penetration depth can be achieved so that the desired mechanical seal is achieved .
Gegenüber der oben beschriebenen, mehr flächigen Verformung der Kaptonfolie im Auflagebereich zwischen dem Rand des Deckelteils und der Schulter des Gehäuseunterteils weist die Maßnahme der umlaufenden Wulst zum einen den Vorteil auf, daß durch die oben beschriebene Wahl der Dicken dafür gesorgt werden kann, daß die Spannungsfestigkeit erhalten bleibt. Die erforderliche Kraft, um die Wulst in die Kaptonscheibe einzudrücken, ist nämlich geringer als die Kraft, die erforderlich ist, um die Kaptonfolie im gesamten Auflagebereich zusammenzudrücken. Durch die Wahl der beim Zusammenbördeln der Gehäuseunterteile erforderlichen Kraft kann also sichergestellt werden, daß zwar die Wulst in die Kaptonfolie eindringt und für die mechanische Abdichtung sorgt, daß aber darüber hinaus keine weitere, insbesondere keine unzulässige Verformung der Kaptonfolie erfolgt.Compared to the above-described, more flat deformation of the Kapton film in the support area between the edge of the cover part and the shoulder of the lower housing part, the measure of the circumferential bead has the advantage, on the one hand, that the choice of the thicknesses described above can ensure that the dielectric strength preserved. The force required to press the bead into the Kapton disk is namely less than the force required to compress the Kapton film over the entire contact area. The choice of the force required when the lower parts of the housing are crimped together can thus ensure that the bead penetrates the Kapton film and provides the mechanical seal, but that no further, in particular no inadmissible deformation of the Kapton film takes place.
Während die im gesamten Auflagebereich verformte Kaptonfolie den Vorteil mit sich bringt, daß die Verformung auf einer größeren Fläche erfolgt und damit für eine sehr gute Abdichtung sorgt, wird diese gute Abdichtung bei dem Ausführungsbeispiel mit der Wulst dadurch erreicht, daß diese wie eine Art Dichtlippe in das Kaptonmaterial eindringt. Selbstverständlich können beide Maßnahmen auch kombiniert eingesetzt werden.While the Kapton film deformed in the entire contact area has the advantage that the deformation takes place over a larger area and thus provides a very good seal, this good seal is achieved in the embodiment with the bead in that it is like a kind of sealing lip in the Kapton material penetrates. Of course, both measures can also be used in combination.
Weitere Vorteile ergeben sich aus der Beschreibung und der beigefügten Zeichnung.Further advantages result from the description and the attached drawing.
Es versteht sich, daß die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the combination indicated in each case, but also in other combinations or on their own without departing from the scope of the present invention.
Die Erfindung ist in der Zeichnung dargestellt und wird in der nachfolgenden Beschreibung näher erläutert. Es zeigen:
- Fig.1
- einen neuen Temperaturwächter in einer geschnittenen Seitenansicht, bei dem die Kaptonfolie im Bereich ihrer Auflagefläche verformt ist (nicht erkennbar); und
- Fig. 2
- ein alternatives Deckelteil, das bei dem Temperaturwächter aus Fig. 1 verwendet werden kann.
- Fig. 1
- a new temperature monitor in a sectional side view, in which the Kapton film is deformed in the area of its contact surface (not visible); and
- Fig. 2
- an alternative cover part that can be used in the temperature monitor of FIG. 1.
In Fig. 1 ist in einem Axialschnitt eine Ausführungsform des neuen Temperaturwächters 10 gezeigt. Der Temperaturwächter 10 umfaßt ein topfförmiges Gehäuseunterteil 11 sowie ein das Gehäuseunterteil 11 verschließendes Deckelteil 12, das auf einer innen umlaufenden Schulter 13 des Gehäuseunterteils 11 aufliegt. Der Temperaturwächter 10 ist über einen Bördelrand 14 des Gehäuseunterteils 11 verschlossen, der das Deckelteil 12 auf die umlaufende Schulter 13 drückt.In Fig. 1, an embodiment of the
In dem Inneren des Gehäuseunterteils 11 befindet sich ein Bimetall-Schaltwerk 15, das von üblicher Konstruktion ist. Es umfaßt eine Federscheibe 16, die ein bewegliches Kontaktteil 17 trägt, über das eine Bimetall-Schnappscheibe 18 gestülpt ist. Die Federscheibe 16 stützt sich an einem Boden 19 des topfförmigen Gehäuseunterteils ab und spannt so das bewegliche Kontaktteil 17 gegen ein festes Kontaktteil 20 vor, das an dem Deckelteil 12 an dessen Innenseite 21 vorgesehen ist.In the interior of the
Bei diesem Temperaturwächter 10 sind Gehäuseunterteil 11 sowie Deckelteil 12 aus leitfähigem Material, vorzugsweise aus Metall gefertigt, so daß eine Kaptonfolie 22 vorgesehen ist, die das Deckelteil 12 gegenüber dem Gehäuseunterteil 11 elektrisch isoliert. Die Kontaktierung des Temperaturwächters 10 erfolgt einerseits über das Deckelteil 12 und andererseits über das Gehäuseunterteil 11, wie dies an sich bekannt ist.In this temperature monitor 10, the
In Fig. 1 ist weiter zu erkennen, daß sich die Kaptonfolie 22 über die gesamte Innenseite 21 des Deckelteils 12 erstreckt, wobei eine Öffnung 23 vorgesehen ist, durch die das bewegliche Kontaktteil 17 hindurchragt.In Fig. 1 it can also be seen that the Kapton
Die Kaptonfolie 22 weist eine bei 25 angedeutete Dicke auf, die größer als 100 µm ist und vorzugsweise 125 µm beträgt. Aufgrund dieser Dicke 25 kann das Deckelteil 12 mit seinem Rand 27 auf die Kaptonfolie 22 in deren Auflagebereich 28 durch den Bördelrand 14 so auf den Rand 13 gedrückt werden, daß der Auflagebereich 28 zumindest teilweise zusammengedrückt wird. Dieser zusammengedrückte Auflagebereich 28 ist in Fig. 1 zwar angedeutet, die Änderung der Dicke 25 in diesem Bereich ist jedoch aus Darstellungsgründen nicht erkennbar.The Kapton
Da die Kaptonfolie 22 aus elastischem, fusselfreiem Material gefertigt ist, das zudem nicht porös ist, kann auf diese Weise für eine gute mechanische Abdichtung zwischen dem Deckelteil 12 sowie dem Gehäuseunterteil 11 gesorgt werden. Durch das Zusammendrücken des Auflagebereiches 28 ergibt sich eine besonders gute mechanische Abdichtung, so daß weder Staub noch Flüssigkeit/Feuchtigkeit in das Innere des Temperaturwächters 10 eindringen können. Selbstverständlich ist es nicht erforderlich, daß Deckelteil 12 sowie Gehäuseunterteil 11 aus elektrisch leitfähigem Material gefertigt sind, es sind auch andere Konstruktionen denkbar, bei denen z.B. das Deckelteil 12 aus elektrisch isolierendem Material gefertigt ist und das feste Kontaktteil 20 sich nach Art eines Nietes durch das Deckelteil 12 hindurch erstreckt und von außen kontaktiert wird.Since the Kapton
Bei einem derartigen Ausführungsbeispiel übernimmt die Kaptonfolie 22 lediglich die Funktion der mechanischen Abdichtung, da eine elektrische Isolation nicht erforderlich ist.In such an embodiment, the
In dem in Fig. 1 gezeigten Zustand weist das Schaltwerk 15 eine Temperatur unterhalb seiner Ansprechtemperatur auf, so daß es sich im geschlossenen Zustand befindet, in dem es für eine leitende Verbindung zwischen dem festen Kontaktteil 20 und damit dem elektrisch leitenden Deckelteil 12 sowie dem Boden 19 und damit dem elektrisch leitenden Gehäuseunterteil 11 sorgt.In the state shown in Fig. 1, the
Wird die Temperatur des Schaltwerkes 15 jetzt erhöht, so schnappt die Bimetall-Schnappscheibe 18 plötzlich von der gezeigten konvexen Form in eine konkave Form um und stützt sich an der Unterseite des Deckelteils 12 unter Zwischenlage der Kaptonfolie 22 derart ab, daß es das bewegliche Kontaktteil gegen die Kraft der Federscheibe 18 von dem festen Kontaktteil 20 abhebt.If the temperature of the
In Fig. 2 ist ein alternatives Deckelteil 12' gezeigt, das bei dem neuen Temperaturwächter aus Fig. 1 verwendet werden kann. Dieses alternative Deckelteil 12' weist im Bereich ihres Randes 27 an der Innenseite 21 eine Wulst 31 oder eine Rippe auf, die eine bei 32 angedeutete Dicke von größer als 20 µm, vorzugsweise von 30 µm aufweist. Im montierten Zustand drückt die Wulst 31 nach Art einer Dichtlippe im Bereich des Auflagebereiches 28 in das Material der Kaptonfolie 22 ein und sorgt so für eine mechanische Abdichtung zwischen Deckelteil 12' sowie Gehäuseunterteil 11.FIG. 2 shows an alternative cover part 12 'which can be used in the new temperature monitor from FIG. 1. This alternative cover part 12 'has in the region of its
Die Dicke 25 der Kaptonfolie 22 sowie die Dicke 32 der Wulst 31 sind so aufeinander abgestimmt, daß nach dem Umbördeln des Bördelrandes 14 die im Bereich der Wulst 31 verbleibende restliche Dicke der Kaptonfolie 22 noch ausreicht, um für die erforderliche Spannungsfestigkeit zu sorgen. Andererseits ist die Dicke 32 so gewählt, daß die mechanische Abdichtung besonders gut erfolgt.The
Claims (12)
dadurch gekennzeichnet, daß die Kaptonfolie (22) für eine mechanische Abdichtung zwischen dem Gehäuseunterteil (11) und dem Deckelteil (12) sorgt.Temperature monitor with a bimetallic switching mechanism (15) which switches at excess temperature, a lower housing part (11) which accommodates the switching mechanism (15), a cover part (12) which closes the lower housing part (11) and a Kapton film (22) which is between the lower housing part (11) and the cover part (12) is arranged,
characterized in that the Kapton film (22) provides a mechanical seal between the lower housing part (11) and the cover part (12).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19623570 | 1996-06-13 | ||
| DE19623570A DE19623570C2 (en) | 1996-06-13 | 1996-06-13 | Temperature monitor with a Kapton film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0813215A1 true EP0813215A1 (en) | 1997-12-17 |
| EP0813215B1 EP0813215B1 (en) | 2002-04-03 |
Family
ID=7796833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97106210A Expired - Lifetime EP0813215B1 (en) | 1996-06-13 | 1997-04-16 | Thermostat with a Kapton foil |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5877671A (en) |
| EP (1) | EP0813215B1 (en) |
| AT (1) | ATE215730T1 (en) |
| DE (2) | DE19623570C2 (en) |
| ES (1) | ES2175212T3 (en) |
| PT (1) | PT813215E (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037017A (en) * | 2013-03-04 | 2014-09-10 | 马赛尔·P·霍夫萨埃斯 | Thermostatic switch with insulating sheet |
| EP3136416A1 (en) * | 2015-08-27 | 2017-03-01 | Marcel P. Hofsaess | Temperature-dependent switch with a spacer ring |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10110562C1 (en) | 2001-03-06 | 2002-12-19 | Marcel Hofsaes | Temperature-dependent switch with stamped adhesive layer |
| CN100446148C (en) * | 2005-11-07 | 2008-12-24 | 徐佳义 | manual reset temperature controller |
| DE102009030353B3 (en) | 2009-06-22 | 2010-12-02 | Hofsaess, Marcel P. | Cap for a temperature-dependent switch and method for producing a temperature-dependent switch |
| EP2282320A1 (en) | 2009-08-01 | 2011-02-09 | Limitor GmbH | Bimetallic snap disc |
| DE102009039948A1 (en) | 2009-08-27 | 2011-03-03 | Hofsaess, Marcel P. | Temperature-dependent switch |
| DE102011104984B4 (en) | 2011-06-20 | 2013-11-28 | Marcel P. HOFSAESS | Temperature-dependent switch with heating resistor on carrier plate |
| DE102011016133B4 (en) | 2011-03-29 | 2012-10-18 | Marcel P. HOFSAESS | Temperature-dependent switch with series resistor |
| EP2506281B1 (en) | 2011-03-29 | 2015-10-07 | Marcel P. Hofsaess | Temperature-dependent circuit with series resistor |
| DE102013101392A1 (en) | 2013-02-13 | 2014-08-14 | Thermik Gerätebau GmbH | Temperature-dependent switch |
| DE102013101393B4 (en) | 2013-02-13 | 2014-10-09 | Thermik Gerätebau GmbH | Temperature-dependent switch |
| DE102013102006B4 (en) * | 2013-02-28 | 2015-03-05 | Marcel P. HOFSAESS | Temperature-dependent switch |
| DE102013108508A1 (en) | 2013-08-07 | 2015-02-12 | Thermik Gerätebau GmbH | Temperature-dependent switch |
| US9831054B2 (en) * | 2014-03-27 | 2017-11-28 | Littelfuse, Inc. | Insulated thermal cut-off device |
| DE102014110260A1 (en) * | 2014-07-22 | 2016-01-28 | Thermik Gerätebau GmbH | Temperature-dependent switch with insulating foil |
| DE102014116888B4 (en) | 2014-11-18 | 2018-05-17 | Thermik Gerätebau GmbH | Temperature-dependent switch |
| DE102015110509B4 (en) | 2015-06-30 | 2019-03-28 | Thermik Gerätebau GmbH | Temperature-dependent switch with insulating disk and electronic circuit with a temperature-dependent switch mounted on a printed circuit board |
| DE102015017281B3 (en) | 2015-06-30 | 2021-09-23 | Thermik Gerätebau GmbH | Temperature-dependent switch with insulating washer and electronic circuit |
| ES2741350T3 (en) | 2016-07-11 | 2020-02-10 | Thermik Geraetebau Gmbh | Temperature dependent switch with insulating washer |
| DE102018100890B3 (en) | 2018-01-16 | 2019-07-18 | Marcel P. HOFSAESS | Temperature-dependent switch |
| US11195679B2 (en) | 2018-11-28 | 2021-12-07 | Marcel P. HOFSAESS | Temperature-dependent switch |
| DE102018130078B4 (en) | 2018-11-28 | 2020-10-15 | Marcel P. HOFSAESS | Temperature dependent switch |
| DE102019111279B4 (en) * | 2019-05-02 | 2020-11-12 | Marcel P. HOFSAESS | Temperature dependent switch |
| DE102019112074B4 (en) * | 2019-05-09 | 2020-12-17 | Marcel P. HOFSAESS | Temperature dependent switch |
| DE102019112581B4 (en) | 2019-05-14 | 2020-12-17 | Marcel P. HOFSAESS | Temperature dependent switch |
| DE102019125450B4 (en) * | 2019-09-20 | 2021-04-08 | Marcel P. HOFSAESS | Temperature dependent switch |
| DE102019132433B4 (en) | 2019-11-29 | 2021-08-12 | Marcel P. HOFSAESS | Temperature dependent switch and process for its manufacture |
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|---|---|---|---|---|
| DE1690301A1 (en) * | 1966-12-30 | 1971-09-23 | Texas Instruments Inc | Thermostatic mini switch |
| US4849729A (en) * | 1987-03-31 | 1989-07-18 | Hofsass P | Temperature-sensitive switch with a casing |
| EP0651411A1 (en) * | 1993-10-30 | 1995-05-03 | Hofsäss, Ulrika | Temperature-dependent switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8806648U1 (en) * | 1988-05-20 | 1989-06-22 | Hofsäss, Peter, 7530 Pforzheim | Temperature switching device |
| DE4142716C2 (en) * | 1991-12-21 | 1997-01-16 | Microtherm Gmbh | Thermal switch |
| DE4233676A1 (en) * | 1992-10-07 | 1994-04-14 | Ego Elektro Blanc & Fischer | Electric radiator for media, especially flow heaters |
-
1996
- 1996-06-13 DE DE19623570A patent/DE19623570C2/en not_active Expired - Fee Related
-
1997
- 1997-04-16 AT AT97106210T patent/ATE215730T1/en active
- 1997-04-16 EP EP97106210A patent/EP0813215B1/en not_active Expired - Lifetime
- 1997-04-16 ES ES97106210T patent/ES2175212T3/en not_active Expired - Lifetime
- 1997-04-16 PT PT97106210T patent/PT813215E/en unknown
- 1997-04-16 DE DE59706826T patent/DE59706826D1/en not_active Expired - Lifetime
- 1997-06-13 US US08/874,514 patent/US5877671A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1690301A1 (en) * | 1966-12-30 | 1971-09-23 | Texas Instruments Inc | Thermostatic mini switch |
| US4849729A (en) * | 1987-03-31 | 1989-07-18 | Hofsass P | Temperature-sensitive switch with a casing |
| EP0651411A1 (en) * | 1993-10-30 | 1995-05-03 | Hofsäss, Ulrika | Temperature-dependent switch |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037017A (en) * | 2013-03-04 | 2014-09-10 | 马赛尔·P·霍夫萨埃斯 | Thermostatic switch with insulating sheet |
| CN104037017B (en) * | 2013-03-04 | 2017-10-24 | 马赛尔·P·霍夫萨埃斯 | Temperature control switch with insulating sheet |
| EP3136416A1 (en) * | 2015-08-27 | 2017-03-01 | Marcel P. Hofsaess | Temperature-dependent switch with a spacer ring |
| EP3410457A1 (en) * | 2015-08-27 | 2018-12-05 | Marcel P. Hofsaess | Temperature-dependent switch with a spacer ring |
| US10541096B2 (en) | 2015-08-27 | 2020-01-21 | Marcel P. HOFSAESS | Temperature-dependent switch with cutting burr |
| US10755880B2 (en) | 2015-08-27 | 2020-08-25 | Marcel P. HOFSAESS | Temperature-dependent switch with cutting burr |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2175212T3 (en) | 2002-11-16 |
| EP0813215B1 (en) | 2002-04-03 |
| DE19623570C2 (en) | 1998-05-28 |
| PT813215E (en) | 2002-09-30 |
| ATE215730T1 (en) | 2002-04-15 |
| DE19623570A1 (en) | 1998-01-02 |
| DE59706826D1 (en) | 2002-05-08 |
| US5877671A (en) | 1999-03-02 |
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