EP0778598B1 - Interrupteur avec un mécanisme de commutation actionné une température excessive - Google Patents

Interrupteur avec un mécanisme de commutation actionné une température excessive Download PDF

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Publication number
EP0778598B1
EP0778598B1 EP96115008A EP96115008A EP0778598B1 EP 0778598 B1 EP0778598 B1 EP 0778598B1 EP 96115008 A EP96115008 A EP 96115008A EP 96115008 A EP96115008 A EP 96115008A EP 0778598 B1 EP0778598 B1 EP 0778598B1
Authority
EP
European Patent Office
Prior art keywords
switch
contact
temperature
fixed contact
bimetallic
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.)
Expired - Lifetime
Application number
EP96115008A
Other languages
German (de)
English (en)
Other versions
EP0778598A2 (fr
EP0778598A3 (fr
Inventor
Marcel 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
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0778598A2 publication Critical patent/EP0778598A2/fr
Publication of EP0778598A3 publication Critical patent/EP0778598A3/fr
Application granted granted Critical
Publication of EP0778598B1 publication Critical patent/EP0778598B1/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/64—Contacts

Definitions

  • the present invention relates to a switch with a Overtemperature switching mechanism for opening and closing a circuit that can be connected to external connections of the switch, the rear derailleur depending on the temperature a bimetallic snap disc working against it, comprises electrically conductive spring part, which in the rest position is electrically connected to an external connection and one piece formed as a dome on the spring part movable Contact that depends on the temperature of the bimetallic snap disc is in contact with a fixed contact who is electrically connected to the other external connection.
  • Such a temperature-dependent switch is from US-A-5 121 095 known.
  • a switch which serves to monitor the temperature of a device. For this he will via its external connections in series with the one to be monitored Device switched and arranged so that the temperature of the monitoring device affects the temperature of a bimetal part. If the switching temperature is exceeded, opens the rear derailleur the connection between the two external connections, and the circuit above it is interrupted. If the temperature drops, the circuit becomes again closed, although this may not be the case bistable temperature-dependent switches are also known.
  • the known switch has an electrically conductive one Lower part and one that closes it electrically conductive cover part existing housing, with for insulation an insulating film between the lower part and the cover part is provided.
  • On the cover part there is an inward protrusion Area formed as a fixed contact.
  • the rear derailleur has a spring washer on which by a flange the movable contact is attached to that with the fixed contact comes in plant.
  • a comparable switch is known from DE-A1-37 10 672.
  • This so-called temperature monitor is self-holding trained, so includes a parallel to the bimetal switchgear switched heating resistor, with the switchgear open is connected in series between the external connections and heats up so far by the current flowing through it that the bimetal switchgear is above its switching temperature holds so that it does not return to the basic state.
  • the high-resistance parallel resistor is in the cover part integrated, either from insulating material or from one there is electrically conductive resistance material.
  • DE-A1-43 37 141 already proposed to weld the contact to the spring washer.
  • FR-A-14 33 185 is another temperature-dependent Known switch, which is an annular spring element with a Has spring tongue projecting radially inwards.
  • the spring element is between a fixed contact and a bimetallic disc arranged such that the spring tongue in the open Switching state supported on a bimetallic disc. jumps the bimetallic disc due to an increase in temperature, so she presses the spring tongue against the fixed contact of the switch on, the current flowing through the spring element.
  • this object is achieved in that the Bimetallic snap disc is placed over the calotte.
  • the object on which the invention is based is achieved in this way completely solved.
  • the inventor of the present application has namely recognized that surprisingly it is not required after all is to use a rotating part as a moving contact part, but that this moving contact is also made of the material the spring washer can be manufactured. So far was in State of the art has always been assumed that the movable Contact must be a separate contact part, which is preferably lies loosely in the spring washer, but at most retrospectively be attached to the spring washer by suitable measures can. This should ensure that the spring properties the spring washer regardless of the massive Contact part can be made. The inventor has now however recognized that this is based on a prejudice, the spring properties of the spring part, on which the contact is in one piece is fully trained for the intended applications sufficient. Furthermore, the inventor found that it too is not necessary to turn a rotating part as a moving contact use, but that the contact resistance and the current conductivity even with one made of the material of the spring part formed mobile contact are sufficient.
  • the new switch has a number of advantages on.
  • the manufacturing costs are reduced by the one Reduced the number of components that can be found in the new switch are, since the new spring part, so to speak, the previous contact part as well as the previous spring part replaced. Furthermore, it is no longer required the contact part before or during the Final assembly of the switch to attach to the spring washer, see above that this manufacturing step is omitted.
  • Another The advantage is that the number of contact resistances, the number of contact areas required the absolute minimum is reduced because of the contact resistance between the contact part used in the prior art as well the spring washer disappears.
  • the bimetallic snap disc is centered on the calotte, so to speak by itself.
  • the calotte closes in the contact area the bimetallic snap disc has an insulating layer.
  • the advantage here is that in each switching state of the new Switch is avoided that current through the bimetallic snap disk to be led. This prevents the Current flow through the switchgear warms the bimetal snap disc and thus a shift in the switching temperature leads.
  • the spherical cap is in the contact area has a resistance layer to the fixed contact.
  • the advantage here is that in the closed state of the new Switch the resistance formed by this resistance layer connected in series between the external connections of the switch is and through the operating current flowing through it of the device to be protected is heated.
  • This warming can either be used to switch the switching temperature of the bimetal switchgear with a kind of preheating. on the other hand can have a current sensitivity via this resistor be set as this as a measure in itself from a standing start is known in the art. If that exceeds that Switching device flowing operating current of the consumer preselected value, so the heating of the resistor becomes like this large that the bimetallic snap disc switches the rear derailleur and breaks the circuit.
  • the arrangement of this resistor now on the calotte of the spring washer has special advantages on because an expensive assembly of the heating resistor - like them is required in the prior art - can be omitted here.
  • the spring part is, so to speak, with pre-assembled resistance delivered so that despite the property of current sensitivity no further assembly steps result.
  • the resistance layer can e.g. B. by sputtering, in thick-film and thin-film technology or applied by other suitable methods become.
  • the single figure shows a schematic longitudinal section through the new switch.
  • the one Housing 11 comprises, in which a bimetallic switching mechanism 12 is arranged is.
  • the housing 11 comprises an electrically conductive lower part 14 and a cover part 15 made of insulating material is supported on a shoulder 16 of the lower part 14.
  • a flanged edge 17 of the lower part 14 becomes the cover part 15 pressed onto the shoulder 16 so that a so-called encapsulated Switch 10 is created.
  • a heating resistor 21 On the inside of the cover part 15 is a heating resistor 21 provided, which via an outer contact ring 22 with the Shoulder 16 is in electrical connection. About an inner Contact ring 23 is the heating resistor 21 with a fixed contact 24 connected, in the form of a rivet 25 through the cover part 15 goes through and a first outer terminal 26 of the switch 10 forms. Between the two contact rings 22, 23 is on an insulating layer 27 is provided for the heating resistor 21.
  • a movable contact 28 is assigned to the fixed contact 24, is the integral part of a spring washer 29 and the shape of a Dome 30 has.
  • the made of electrically conductive material manufactured spring washer is supported with its edge 31 on the floor 32 of the lower part 14.
  • a bimetallic snap disk 33 Over the calotte 30 is a bimetallic snap disk 33 slipped, which has an edge 34.
  • the calotte In the contact area to the fixed contact 24, the calotte has 30 on a resistance layer 35, which is a heating resistor 36 forms. Furthermore, is in the contact area to the bimetallic snap disk 33 an insulating layer 37 is provided on the calotte 30, so that in this area there is no electrical connection between the spring washer 30 and the bimetallic snap disk 33.
  • a second external connection 38 of the switch 10 is formed by the lower part 14 itself.
  • the Bimetal snap disk 33 In the switch position shown in Fig. 1 is the Bimetal snap disk 33 below its response temperature, so that the spring washer 29 for electrical contact between the lower part 14 and the fixed contact 24 and thus the external connection 26 provides.
  • the heating resistor 36 In a row between the external connections 25 and 38, the heating resistor 36 is connected, which is thus from Current of one to be connected to the external connections 26, 38 Device is flowed through.
  • the heating resistor 21 is parallel switched to the bimetal switchgear 12 and is in the in Fig. 1 shown switching position by the series connection Bimetal switchgear and heating resistor 36 bridged.
  • the Resistance values of the heating resistors 36 and 21 are selected so that the operating current of the device to be protected essentially flows through the heating resistor 36.
  • the temperature of the Bimetal snap disk 33 rises above the response temperature the bimetallic snap disc suddenly snaps, supports itself with its edge 34 on the insulating layer 27 and lifts against the force of the spring washer 29, the cap 30 of the fixed Contact 24 from.
  • the current now flows through the heating resistor 21, which develops sufficient heat to the bimetal rear derailleur to keep in the open state.
  • Insulating layer 27 would have no current through the bimetallic snap disk 33 flow because they pass through the insulating layer 37 is isolated from the spring washer 29.
  • the insulation layer 37 further ensures in the state shown in Fig. 1 that even in the rest position of the switching mechanism 12, no partial flow through the bimetallic snap disk 33 flows and the switching temperature changed by that.
  • the new switch can also be used without heating resistors 21 and / or 36 are built, the switch 10 then only serves to monitor the temperature.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Slide Switches (AREA)

Claims (4)

  1. Commutateur avec un mécanisme de commutation (12) commutant en cas de sur-température pour ouvrir et fermer un circuit électrique pouvant être raccordé à des branchements extérieurs (26, 38) du commutateur (10), le mécanisme de commutation (12) comprenant une partie formant ressort (29) conductrice électrique travaillant en fonction de la température d'un disque à déclic bimétallique (33) contre celui-ci, partie qui est reliée électriquement en position de repos à un branchement extérieur (38) et porte un contact mobile (28) formé d'un seul tenant en forme de calotte sur la partie formant ressort (29), contact qui, en fonction de la température du disque à déclic bimétallique (33), est en appui sur un contact fixe (24) qui est relié électriquement à l'autre branchement extérieur (26), caractérisé en ce que le disque à déclic bimétallique (33) est rabattu par-dessus la calotte (30).
  2. Commutateur selon la revendication 1, caractérisé en ce que la calotte (30) présente une couche isolante (37) dans la zone de contact avec le disque à déclic bimétallique (33).
  3. Commutateur selon la revendication 1 ou 2, caractérisé en ce que la calotte (30) présente une couche résistive (35) dans la zone de contact avec le contact fixe (24).
  4. Commutateur selon l'une des revendications 1 à 3, caractérisé en ce qu'il comprend un boítier (11) avec une partie inférieure conductrice électrique (14) dans laquelle s'appuie la partie formant ressort (29), et une partie formant couvercle (15) qui ferme la partie inférieure (14) et porte le contact fixe (24).
EP96115008A 1995-12-09 1996-09-19 Interrupteur avec un mécanisme de commutation actionné une température excessive Expired - Lifetime EP0778598B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19546004 1995-12-09
DE19546004A DE19546004C2 (de) 1995-12-09 1995-12-09 Schalter mit einem bei Übertemperatur schaltenden Schaltwerk

Publications (3)

Publication Number Publication Date
EP0778598A2 EP0778598A2 (fr) 1997-06-11
EP0778598A3 EP0778598A3 (fr) 1998-05-27
EP0778598B1 true EP0778598B1 (fr) 2002-04-10

Family

ID=7779671

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96115008A Expired - Lifetime EP0778598B1 (fr) 1995-12-09 1996-09-19 Interrupteur avec un mécanisme de commutation actionné une température excessive

Country Status (4)

Country Link
US (1) US5903210A (fr)
EP (1) EP0778598B1 (fr)
AT (1) ATE216127T1 (fr)
DE (2) DE19546004C2 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006092825A (ja) * 2004-09-22 2006-04-06 Fuji Denshi Kogyo Kk 温度スイッチと温度スイッチの組立方法
KR100982038B1 (ko) * 2009-10-30 2010-09-14 한백디스템(주) 과전류 차단기
US20130021132A1 (en) * 2011-07-21 2013-01-24 Honeywell International Inc. Permanent one-shot thermostat
DE102011119633B3 (de) * 2011-11-22 2013-04-11 Marcel P. HOFSAESS Temperaturabhängiger Schalter
DE102012103306B3 (de) * 2012-04-17 2013-04-25 Thermik Gerätebau GmbH Temperaturabhängiger Schalter mit Kontaktteil als Heizwiderstand
JP6157856B2 (ja) * 2013-01-10 2017-07-05 カルソニックカンセイ株式会社 熱感知装置
DE102013108508A1 (de) * 2013-08-07 2015-02-12 Thermik Gerätebau GmbH Temperaturabhängiger Schalter
DE102014108518A1 (de) * 2014-06-17 2015-12-17 Thermik Gerätebau GmbH Temperaturabhängiger Schalter mit Distanzring
DE102015114248B4 (de) 2015-08-27 2019-01-17 Marcel P. HOFSAESS Temperaturabhängiger Schalter mit Schneidgrat

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1433185A (fr) * 1965-05-13 1966-03-25 Borletti Spa Thermocontact à bilame
DE2917482C2 (de) * 1979-04-30 1982-11-25 Peter 7530 Pforzheim Hofsäss Übertemperaturschutzschalter
DE3319225A1 (de) * 1983-05-27 1984-11-29 Microtherm Gmbh, 7530 Pforzheim Thermoschalter
DE3319227A1 (de) * 1983-05-27 1984-11-29 Microtherm Gmbh, 7530 Pforzheim Thermoschalter
US4492946A (en) * 1983-10-20 1985-01-08 Therm-O-Disc, Incorporated Edge-actuated thermostat
DE3710672C2 (de) * 1987-03-31 1997-05-15 Hofsaes Geb Zeitz Ulrika Temperaturwächter mit einem Gehäuse
US4894634A (en) * 1988-10-19 1990-01-16 Texas Instruments Incorporated Switch device
JPH02126336U (fr) * 1989-01-17 1990-10-18
JP2519560B2 (ja) * 1990-02-14 1996-07-31 生方 眞哉 感熱スイッチ
DE4142716C2 (de) * 1991-12-21 1997-01-16 Microtherm Gmbh Thermoschalter
DE4206157A1 (de) * 1992-02-28 1993-09-16 Hofsass P Thermoschalter
GB2275823B (en) * 1993-02-18 1996-11-27 Otter Controls Ltd Improvements relating to electric switches
DE4337141C2 (de) * 1993-10-30 1996-06-05 Hofsaes Geb Zeitz Ulrika Temperaturabhängiger Schalter

Also Published As

Publication number Publication date
EP0778598A2 (fr) 1997-06-11
EP0778598A3 (fr) 1998-05-27
ATE216127T1 (de) 2002-04-15
DE19546004C2 (de) 1998-01-15
US5903210A (en) 1999-05-11
DE19546004A1 (de) 1997-06-19
DE59609050D1 (de) 2002-05-16

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