EP0730285A1 - Boîtier isolant - Google Patents

Boîtier isolant Download PDF

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Publication number
EP0730285A1
EP0730285A1 EP96100737A EP96100737A EP0730285A1 EP 0730285 A1 EP0730285 A1 EP 0730285A1 EP 96100737 A EP96100737 A EP 96100737A EP 96100737 A EP96100737 A EP 96100737A EP 0730285 A1 EP0730285 A1 EP 0730285A1
Authority
EP
European Patent Office
Prior art keywords
insulating housing
switch
contact
housing according
contact parts
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
Application number
EP96100737A
Other languages
German (de)
English (en)
Other versions
EP0730285B1 (fr
Inventor
Marcel Peter Hofsäss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HOFSAESS, MARCEL PETER
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19507488A external-priority patent/DE19507488C2/de
Priority claimed from DE19545996A external-priority patent/DE19545996C2/de
Application filed by Individual filed Critical Individual
Publication of EP0730285A1 publication Critical patent/EP0730285A1/fr
Application granted granted Critical
Publication of EP0730285B1 publication Critical patent/EP0730285B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the present invention relates to an insulating housing with an interior for receiving a mechanically and / or electrically protected switch with a temperature-dependent switching mechanism, the switch having two electrically conductive connection surfaces via which an electrical connection of the switch to contact parts of a holder or an electrical to be protected Consumer.
  • Such an insulating housing is known from DE 38 17 080 A1.
  • This publication describes a temperature monitor in which a switch with a temperature-dependent switching mechanism is arranged in an insulating housing.
  • the insulating housing is designed so that it can be plugged onto connections of a consumer to be monitored, two connections also protruding from the insulating housing of the temperature monitor, which correspond to a desired connection diagram.
  • there is no standardized connection diagram so that it cannot be supplied with current via a standardized plug.
  • the implementation of the connection diagram of the consumer on the standardized connection diagram takes place via the insulating housing, in which there are intricately bent sheet metal parts which, on the one hand, contact the housing of the switching mechanism and, on the other hand, form connecting lugs or mating connectors for the connecting lugs of the consumer or standardized connector.
  • connection technology which connects the switching mechanism in the interior of the insulating housing to the external connections
  • the known temperature monitor is a very cost-intensive component, since the connection technology can generally only be accomplished by hand.
  • a switch with a temperature-dependent switching mechanism such as can be used for the purpose of the present invention, is known from DE 29 17 482 C2.
  • the switch has a closed housing in which the switching mechanism is arranged.
  • the housing comprises an electrically conductive cover and an electrically conductive lower part which is insulated from the cover. The electrical connection of the switch in the installed state takes place directly over the cover and the lower part.
  • Such switches which are also called temperature monitors, are used to monitor the operating temperature and / or the operating current of the electrical consumer to be protected. If the operating temperature of the consumer exceeds a certain limit, the switch opens, which must be connected in series with the consumer in the supply circuit for this purpose.
  • the switch By means of parallel and / or series resistors provided on the switch, such switches can be designed to be self-holding and, if necessary, also when the current switching is too high if the series resistance heats up too much.
  • Such consumers are generally known from the prior art. Especially in household appliances, more and more devices with electrical consumers are being used, such as. B. drain pumps for washing machines, motors for compressors in refrigerators and freezers, transformers for electrical devices that are operated with a voltage different from the mains voltage, fan motors and heating coils for hair dryers, etc.
  • temperature monitors are used, which have their own housing or support part and are subsequently installed on the consumer.
  • guard housings there are Bimeta11 switchgear assemblies, which are usually connected to two terminal lugs, terminals or strands that are located on the guard housing itself.
  • Such a connection element of the temperature monitor is connected to a corresponding connection element of the consumer, wherein the second connection element of the temperature monitor and the second connection element of the consumer then serve for the electrical supply to the consumer, which is now connected in series with the temperature monitor.
  • Such temperature monitors are usually special developments that must be adapted to the consumer to be protected. It is not only important to pay attention to the connection technology, but also to ensure good thermal contact with the consumer to be monitored. As a result, the costs for the design and manufacture of such temperature monitors are very high. Naturally, these costs are also transferred to the end costs of the consumers protected by the temperature monitor.
  • a temperature monitor which has a frame made of plastic, onto which an electrically conductive contact plate is snapped on from above and from below.
  • a bimetallic switching mechanism is arranged in the frame and is clamped between the contact plates. The contact is made by placing the upper contact plate on the cover and the lower contact plate on the bottom of the rear derailleur.
  • the upper contact plate When assembling the temperature monitor, the upper contact plate is first snapped onto the frame before the switching mechanism is inserted into the frame from the underside. Finally, the lower contact plate is placed from below, so that the switching mechanism is held clamped between the two contact plates, the latching projections of the frame part forming the abutments for the clamping forces.
  • Another disadvantage of the known temperature monitor is in connection with the required contact reliability between the bimetallic switching mechanism and the contact plates forming the external connections. Since the contact forces are applied through non-curved lugs of the contact plates, this contacting often does not meet the long-term requirements, because the high loads in everyday operation, e.g. B. by continuous vibrations of the devices protected by the temperature monitor, weaken the locking connection. Especially when the tolerances of the mated Components add up unfavorably, contact reliability can no longer be guaranteed after a short period of operation.
  • connection technology that is to say the connection of the possibly encapsulated bimetal switchgear with the external connections
  • connection technology is very labor-intensive in the manufacture of such temperature monitors and requires the storage of many individual parts.
  • the known temperature monitor or its holder can only be assembled manually, which not only entails high costs, but also further increases the reject rate.
  • this object is achieved in the insulating housing mentioned at the outset in that it has at least one opening through which the contact parts come into direct contact with the two connection surfaces and clamp the switch between them.
  • the insulating housing is now designed so that the switch only has to be inserted, whereupon the insulating housing is then pushed onto contact parts of an electrical consumer. These contact parts come into contact with the two connection surfaces and thus contact the one in the Temperature-dependent switching mechanism provided inside the switch.
  • the switch can be inserted mechanically into the insulating housing, it also being possible for the switch to be extrusion-coated with a correspondingly shaped insulating housing. Not only the production but also the final assembly and the attachment to the electrical consumer to be protected or to a holder provided for this purpose are thus very simple, can be automated and are therefore inexpensive and fail-safe.
  • the electrical consumer mentioned is equipped so that two contact parts form a receptacle for the switch, one of the two connection elements and one of the two contact parts are connected to the consumer and the other contact part is connected to the other connection element.
  • the new insulating housing thus creates an extremely simple connection technology, which can be implemented inexpensively and with little waste.
  • the insulating housing has an inner profile through which the inserted contact parts are pressed onto the connection surfaces.
  • the advantage here is that it is not the spring force of the contact parts that is decisive for the contact security, but that the contacting is at least supported by the inner profile of the insulating housing.
  • the insulating housing has at least one locking element, via which it locks with an assigned locking element on one of the contact parts.
  • the insulating housing and thus the switch accommodated therein are held captively on the electrical consumer, this holding force being independent of the contacting force between the contact parts and the connection surfaces.
  • the insulating housing holds a received switch captively, for which purpose it preferably has latchable means which can be pushed over and which hold a received switch captively.
  • the advantage here is that a temperature monitor consisting of an insulating housing and switch can be preassembled, the switch only has to be inserted into the insulating housing, where it is held captively by the overpressed locking elements. Such temperature monitors can then be transported as bulk goods, since the switch is mechanically protected by the insulating housing surrounding it. Of course, this insertion of the switch into the insulating housing can be accomplished by automatic manufacturing machines.
  • the insulating housing has guide channels or grooves for the contact parts, the guide channels or grooves preferably having a guide surface which is inclined in the longitudinal direction toward the interior or a guide surface which is curved in the longitudinal direction.
  • the guide surfaces advantageously provide for one corresponding contact pressure that the contact parts exert on the connection surfaces of the switch.
  • the guide channels and / or grooves have the further advantage that the contact parts are guided when the insulating housing is pushed on, so that they cannot buckle or break off.
  • the insulating housing has a further opening for pushing the switch into the interior, the further opening preferably running perpendicular to the guide channels and / or grooves.
  • This measure has the advantage that the switch is not only contacted by the contact parts inserted into the guide channels or grooves, but is also prevented from falling out of the insulating housing.
  • This can either be completely dispensed with further locking means that hold the switch in an insulating housing that has not yet been mounted on a consumer, or it is possible to use locking means that can be easily overridden, which are only for the transport of an insulating housing that has not yet been mounted on a consumer ensure safe mechanical coldness of the switch inside the insulating housing.
  • this not only simplifies the construction of the new insulating housing, it also greatly simplifies the individual assembly steps required.
  • the insulating housing is made entirely of insulating material and is preferably a plastic injection molded part.
  • the advantage here is that the insulating housing can be manufactured in one piece in a very simple, inexpensive injection molding process.
  • connection lugs onto which a new insulating housing with a switch accommodated therein can be plugged, so that very inexpensive, also otherwise used, connecting lugs can be used to isolate the housing and switches to contact existing temperature monitors electrically and to hold them mechanically.
  • the insulating housing can be designed in such a way that the received switch is held loosely or is clamped firmly by the latching means. The switch is then contacted only by inserting the contact parts or connecting lugs of a holder or electrical consumer into the insulating housing, the insulating housing itself ensuring that the contact parts are pressed onto the contact surfaces of the switch and held there immovably by the internal shape.
  • Fig. 1 generally 10 denotes a new insulating housing which has an interior 11 for receiving a switch 12 with a temperature-dependent switching mechanism.
  • the switch 12 shown on the right next to the insulating housing 10 in FIG. 1 has an upper connection surface 13 and a lower connection surface 14, which are part of an electrically conductive cover part 15 or an electrically conductive lower part 16, which insulates the cover part 15 in a known manner is.
  • Cover part 15 and lower part 16 form an encapsulated housing 17 in which the temperature-dependent switching mechanism is arranged in a known manner.
  • the insulating housing 10 has an opening 18 in which pressable locking means 19 in the form of locking lugs 21 and 22 are arranged. Through this opening 18, the switch 12 can be pushed into the interior 11, where it is then held captively but loosely by the detents 21 and 22.
  • a holder 23 is shown on the right, which is part of a consumer or is suitable to be connected to a consumer to be protected.
  • the holder 23 has two contact parts 24, 25, which are terminal lugs 26, 27 here.
  • the connecting lugs 26, 27 point towards one another with their broad sides and are at a clearance 28 from one another which corresponds to the thickness or height of the switch 12 indicated at 28 '.
  • the opening 18 of the insulating housing 10 has an internal width 29 which is dimensioned such that the connecting lugs 26, 27 can also be inserted into the insulating housing 10 when the switch 12 is located in the interior 11.
  • a latching element 31 in the form of a depression, with which a further latching element 32 on the connecting lug 27 interacts in such a way that an insulating housing 10 pushed onto the connecting lugs 26, 27 is held captively.
  • Two further latching elements 33, 34 are arranged in the cover part 15 of the switch 12 or on the connecting lug 26 such that a further captive mounting of the insulating housing 10 is realized on the holder 23 via the switch 12 held captively therein.
  • the terminal lug 26 rests on the cover part 15, while the terminal lug 27 bears against the lower part 16.
  • the insulating housing 10 has guide bevels 35, 36 which run inclined into the interior 11. By means of these guide bevels 35, 36, the connection lugs 26, 27 are pressed onto the connection surfaces 13, 14, so that the electrical contact between these parts is further improved. Due to the applied forces, however, the insulating housing 10 is not pushed away again from the holder 23, since a captive mounting is realized via the latching elements 31, 32, 33, 34, as has already been described above.
  • the insulating housing 10 is a one-piece injection molded plastic part 39, which can be produced very inexpensively as a corresponding mass article.
  • FIG. 3 shows a further insulating housing 41, in the interior 42 of which a switch 12 is indicated.
  • the switch 12 is held firmly in the interior 42 by a locking lug 43, which acts in the same way as the locking lugs 21, 22 in the insulating housing 10.
  • the switch 12 is pushed into the interior 12 through an opening 44 from below until the latch 43 is suppressed.
  • the interior 42 can then be closed by a cover 45.
  • the insulating housing 41 also has guide channels 46, 47 into which the connecting lugs 26, 27 are inserted.
  • the upper guide channel 46 has a curved guide surface 48 through which the terminal lug 26 is bent downwards when inserted into the guide channel 46 in FIG. 3, so that it engages with its latching element 34 through a latching opening 49 with the cover part 15 of the switch 12 came into contact. In this way, not only mechanical locking but also very good electrical contact is achieved.
  • a latching part 51 is provided on the lower connecting lug 27 and comes into contact with the lower part 16 of the switch 12 when the insulating housing 41 is pushed on.
  • the latter In order to enable insertion of the thickened connecting lug 27 into the guide channel 47, the latter has an enlarged insertion opening 50.
  • the guide channels 46, 47 end in grooves 52, 53, in which the terminal lugs 26, 27 come to rest with their front ends 54, 55 when the insulating housing 41 has been completely pushed open. These grooves 52, 53 ensure that the electrical contact between the connecting lugs 26, 27 and the switch 12 is maintained even in the event of strong vibrations or other mechanical stresses.
  • the inserted contact parts 24, 25 also ensure that the switch 12 is mechanically seated, so that the detent 43 could also be dispensed with if the switch 12 and the insulating housing 41 are to be stored separately .
  • the holder 23 is arranged on a consumer 57, which has two connection elements 58, 59 for connection to an external circuit. While the connection element 59 is connected directly to the electrical load 57, the connection element 58 is in electrical connection with the connection lug 27.
  • the second connection lug 26, is connected directly to the electrical load 57. Due to the selected arrangement, a switch 12 received between the connecting lugs 26, 27 is connected in series with the consumer 57 between the connecting elements 58, 59. It should also be mentioned that the connecting lugs 26, 27 face each other with their broad sides 61, 62.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
EP96100737A 1995-03-03 1996-01-19 Boítier isolant Expired - Lifetime EP0730285B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19507488 1995-03-03
DE19507488A DE19507488C2 (de) 1995-03-03 1995-03-03 Halter für ein Bimetall-Schaltwerk sowie Temperaturwächter mit einem Bimetall-Schaltwerk
DE19545996 1995-12-09
DE19545996A DE19545996C2 (de) 1995-03-03 1995-12-09 Isoliergehäuse und elektrischer Verbraucher

Publications (2)

Publication Number Publication Date
EP0730285A1 true EP0730285A1 (fr) 1996-09-04
EP0730285B1 EP0730285B1 (fr) 1999-10-20

Family

ID=26013000

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96100737A Expired - Lifetime EP0730285B1 (fr) 1995-03-03 1996-01-19 Boítier isolant

Country Status (5)

Country Link
US (1) US5699033A (fr)
EP (1) EP0730285B1 (fr)
AT (1) ATE185925T1 (fr)
DK (1) DK0730285T3 (fr)
ES (1) ES2139963T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008006385A1 (fr) 2006-07-11 2008-01-17 Thermik Geraetebau Gmbh Capuchon de connexion et commutateur à capuchon de connexion

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3739525B2 (ja) * 1996-12-27 2006-01-25 富士通株式会社 可変遅延回路及び半導体集積回路装置
DE19705410C2 (de) * 1997-02-13 1999-02-11 Thermik Geraetebau Gmbh Temperaturabhängiger Schalter mit Haltebügel
US6781504B2 (en) * 2001-08-14 2004-08-24 Honeywell International, Inc. Thermal switch adapter
US7808363B1 (en) * 2008-01-22 2010-10-05 Cantalice John J Overheat protection for pump
CN201435503Y (zh) * 2009-01-06 2010-03-31 深大宇电器(深圳)有限公司 一种过温过电流保护电源插头
DE102009030353B3 (de) * 2009-06-22 2010-12-02 Hofsaess, Marcel P. Kappe für einen temperaturabhängigen Schalter sowie Verfahren zur Fertigung eines temperaturabhängigen Schalters
DE102009039948A1 (de) * 2009-08-27 2011-03-03 Hofsaess, Marcel P. Temperaturabhängiger Schalter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3031565A (en) * 1959-06-08 1962-04-24 Texas Instruments Inc Condition-responsive control device
GB2049291A (en) * 1979-04-30 1980-12-17 Hofsass P Thermal switches
DE8708064U1 (de) * 1987-06-06 1987-10-15 Hanning Elektro-Werke GmbH & Co, 4811 Oerlinghausen Temperaturüberwachungseinrichtung für Spaltpolmotoren
DE9004941U1 (de) * 1990-05-01 1991-05-29 Hofsäss, Peter, 75181 Pforzheim Halter zum Befestigen eines Temperaturschalters

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8607370U1 (de) * 1986-03-18 1987-04-16 Hofsäss, Peter, 75181 Pforzheim Thermoschalter zum Einbau in ein Gerät
DE3817080A1 (de) * 1987-06-06 1988-12-15 Hanning Elektro Werke Temperaturueberwachungseinrichtung fuer spaltpolmotoren
US4795997A (en) * 1987-11-02 1989-01-03 North American Philips Corporation Thermostat for board mounting
DE9004943U1 (de) * 1990-05-01 1991-05-29 Hofsaess, Peter, 7530 Pforzheim Halter zum Befestigen eines Temperaturschalters an einem elektrischen Gerät
DE9214543U1 (de) * 1992-10-27 1992-12-17 Thermik Gerätebau GmbH, 75181 Pforzheim Temperaturschalter mit gekapseltem Schaltwerk
DE9301874U1 (de) * 1993-02-10 1993-07-08 Bosch-Siemens Hausgeräte GmbH, 8000 München Halterung für einen temperaturabhängigen Schalter für Backöfen
JP3421421B2 (ja) * 1993-06-15 2003-06-30 マブチモーター株式会社 小型モータ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3031565A (en) * 1959-06-08 1962-04-24 Texas Instruments Inc Condition-responsive control device
GB2049291A (en) * 1979-04-30 1980-12-17 Hofsass P Thermal switches
DE8708064U1 (de) * 1987-06-06 1987-10-15 Hanning Elektro-Werke GmbH & Co, 4811 Oerlinghausen Temperaturüberwachungseinrichtung für Spaltpolmotoren
DE9004941U1 (de) * 1990-05-01 1991-05-29 Hofsäss, Peter, 75181 Pforzheim Halter zum Befestigen eines Temperaturschalters

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008006385A1 (fr) 2006-07-11 2008-01-17 Thermik Geraetebau Gmbh Capuchon de connexion et commutateur à capuchon de connexion

Also Published As

Publication number Publication date
EP0730285B1 (fr) 1999-10-20
US5699033A (en) 1997-12-16
ATE185925T1 (de) 1999-11-15
DK0730285T3 (da) 1999-12-27
ES2139963T3 (es) 2000-02-16

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