EP0920044B1 - Schalter mit einem temperaturabhängigen Schaltwerk - Google Patents

Schalter mit einem temperaturabhängigen Schaltwerk Download PDF

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Publication number
EP0920044B1
EP0920044B1 EP98116171A EP98116171A EP0920044B1 EP 0920044 B1 EP0920044 B1 EP 0920044B1 EP 98116171 A EP98116171 A EP 98116171A EP 98116171 A EP98116171 A EP 98116171A EP 0920044 B1 EP0920044 B1 EP 0920044B1
Authority
EP
European Patent Office
Prior art keywords
electrode
switch
housing part
switching mechanism
housing
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
EP98116171A
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German (de)
English (en)
French (fr)
Other versions
EP0920044A2 (de
EP0920044A3 (de
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.)
Individual
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
Application filed by Individual filed Critical Individual
Publication of EP0920044A2 publication Critical patent/EP0920044A2/de
Publication of EP0920044A3 publication Critical patent/EP0920044A3/de
Application granted granted Critical
Publication of EP0920044B1 publication Critical patent/EP0920044B1/de
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
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/504—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by thermal means

Definitions

  • the present invention relates to a switch with a temperature-dependent rear derailleur housing, the one first housing part, on the inner bottom one with a first External connection connected first electrode is arranged, and a second housing part which closes the first housing part which has one connected to a second external connection comprises second electrode, the switching mechanism depending an electrically conductive connection from its temperature between the first and the second electrode.
  • the first housing part is made of insulating material manufactured, in which the first electrode by injection molding or embedded potting as an integral part is.
  • This first housing part is replaced by a second housing part in the form of an electrically conductive material Bottom closed, the inside as a second electrode acts.
  • Both electrodes are, so to speak, disc-shaped sheet metal parts which are integrally formed approaches that are external connections serve the switch.
  • the bottom part lies on it a shoulder of the first housing part and is replaced by a hot stamped ring held on this.
  • the Spring washer is supported with its edge on the bottom part and the movable contact part carried by her below the Switching temperature against an inwardly projecting counter contact on the other electrode.
  • the contact part is fitted with a bimetallic snap disc, which is free of forces below its switching temperature and when the temperature rises above its switching point Movable contact part against the force of the spring washer Counter contact lifts off and thereby the electrical connection between the two external connections opens.
  • the known switch described so far is extremely robust and has very small external dimensions, which is why it is not only universal but can be used especially where little Assembly space is available, e.g. in coils of transformers or electric motors.
  • Such switches are in series between that device to be protected and a power supply switched, so that the operating current of the device to be protected by the Switch flows, this current in the event of an impermissible temperature increase consequently switches off.
  • This protective function of a switch with temperature-dependent Switchgear is called "current-dependent" switching and therefore causes a series resistor to be in series with the rear derailleur is switched, which is also from the operating current of the protective device is flowed through.
  • this series resistance and its thermal Coupling to the switch leads to a certain current flow through the switch and thus the series resistance to development a certain amount of heat, which in turn switches and so that the bimetallic snap disc is heated in a defined manner.
  • On the Resistance value can therefore be an upper limit for the operating current be predetermined. If the operating current exceeds this Value, so is developed by that in the series resistor Heat the bimetal snap disc above its switching temperature also increases so that the switch opens before the device to be protected has warmed up inadmissibly.
  • Such a switch is known from DE 43 36 564 A1.
  • This switch initially comprises an encapsulated bimet. l-switching mechanism, that housed in a two-piece metal case is, as is known for example from DE 21 21 802 A1.
  • This encapsulated switch is now placed on a ceramic support, on which there is a thick film resistor, the via conductor tracks with the conductive lower part of the encapsulated Derailleur is connected. The other end of the resistance is connected to a solder pad to which a first lead is soldered. The second lead is electrical conductive cover part of the encapsulated rear derailleur soldered.
  • the ceramic carrier cannot be mechanically loaded, Hairline cracks occur during transport as bulk goods Incoming inspection can only be recognized with a microscope can. Loosen by soldering the wire to the ceramic carrier often the conductor tracks. Because of this problem is a increased control and inspection effort required, the pricing of the product to the appropriate height. Another The disadvantage is the low pressure stability of this construction, for wrapping in transformer windings or electric motors is not suitable.
  • this well-known switch is widely used, because the application of a resistor with a defined resistance value a well-mastered technique on a ceramic carrier is, here e.g. Thick film resistors used.
  • the choice of the resistance values of parallel resistance as well as Series resistance is such that the series resistance is one takes on a very low ohmic value in order to keep the current flowing as possible little to influence, while the parallel resistance one has significantly greater value to the strength of the residual current to be clearly limited, i.e. the device against an excessive operating current to protect.
  • Such a self-holding function is also off the switch known from DE 43 36 564 A1.
  • the ceramic carrier is provided with a PTC component, one end with the second connecting wire and other end with conductor tracks is soldered to the lower part of the encapsulated rear derailleur are connected.
  • the PTC device is electrically parallel to that two-part, encapsulated housing and thus to the temperature-dependent Rear derailleur arranged so that it is closed Switchgear state is bridged by this and it in the open Condition of the rear derailleur is heating up.
  • the self-holding function is also satisfactory realized, but it can be manufacturing technology conditional problems occur when the known switch is not assembled by specialists. So it is known that when soldering PTC components influences their temperature curve due to improper soldering also mechanical Damage to the PTC module can be caused.
  • Another switch is known from EP 0 756 302, in which a parallel resistor can be provided for a Self-holding function.
  • the well-known switch is as Construction set up, it has several components, each can be designed differently according to requirements.
  • the switch comprises an electrically conductive material manufactured lower part as well as an electrically conductive one Cover part, which is separated from the lower part by an insulating sleeve is electrically insulated.
  • the cover part is supported a ring, which is designed as an isolator or PTC module can be.
  • This ring lies on an electrically conductive one Disc on, which in turn is electrical on another conductive ring, which rests on a plate, which as Short-circuit part or can be designed as a series resistor.
  • the known switch is structurally complex, the individual Components are specially matched to the switch.
  • this object is achieved according to the invention solved in that in the housing geometrically and a parallel resistor electrically between the two electrodes is arranged, the first housing part made of insulating material is made in which the first electrode is held captive and a through opening in the first housing part is provided, which extends from the first to the second electrode extends and accommodates a PTC module that acts as a parallel resistor is connected to both electrodes.
  • the object underlying the invention is based on this Way completely solved.
  • the inventor of the present application has recognized that that it is not necessary to have the parallel resistance outside to arrange the housing of the switch on a separate carrier, but that this is both electrical and geometric can be placed between the two electrodes.
  • the Parallel resistance is therefore no longer accessible from the outside, thus protected from mechanical influences.
  • Another The advantage is that separate soldering measures as in the state the technology for parallel resistance is not required, so that shifts in the temperature curve of a PTC module be avoided.
  • the inventor of the present application has recognized that the PTC module still in the housing of the generic switch can be integrated because a PTC module with clearly smaller dimensions can be used if between parallel resistance and temperature-dependent rear derailleur no two-part Metal casing is present.
  • the PTC module is only make sure that it is at least 2 mm high, thus the required distance for dielectric strength remains between the two electrodes.
  • the insulation of the PTC module done automatically, so to speak, during production of the new switch just a piece of PTC ceramic in the provided opening must be inserted, which in the end yes is already closed by the integral first electrode. After that, the second electrode is attached, creating the opening is also closed on the second side and at the same time the PTC module can be contacted.
  • the new switch is very easy to install, in the previous manufacturing process for the generic Switch is just a step as a further measure to be provided in which the PTC module is inserted into the opening becomes. Another change must be made when manufacturing the housing Insulating the tool so that the opening is changed is created automatically.
  • a spring tongue is provided which opposes the PTC module the other electrode presses.
  • This measure has the advantage that reliable contacting of the PTC module with both electrodes, wherein is prevented by the spring force of the spring tongue on the PTC component has been subjected to excessive mechanical loads become.
  • the first electrode is in the first Housing part by casting or injection molding during manufacture the housing part is held so captive that it is integral Part of this housing part is, preferably the second housing part is an electrically conductive base part whose inner bottom acts as a second electrode.
  • the switch comprises a ceramic support which points towards the switching mechanism is arranged on one of the two electrodes and a series resistor wearing one end with the electrode and another Is connected to a mating contact for the rear derailleur, preferably the first electrode one on the switching mechanism Has to be facing flat surface to which the ceramic carrier is attached and with which the series resistor is electrically connected is.
  • the first electrode now uses a flat surface on which the Ceramic carrier is placed. Because of the planned edition, the Ceramic carrier hardly loaded mechanically by the rear derailleur, see above that this including the series resistance provided on it and the counter contact arranged on it none must have a greater thickness than the counter contact in the State of the art switches. However, this means that the switch can maintain its original dimensions, whereby only the first electrode has a different shape must, instead of the counter contact, provide a flat surface on it, to which the ceramic support is attached.
  • the ceramic support A through-connection can be made for the series resistor have and so glued to the plane surface that the Plating through electrically at the same time with this electrode is contacted.
  • the ceramic carrier has at least one preferably laser-perforated through hole, through which he soldered to the electrode and the Series resistor is electrically connected to this.
  • the laser-punched Through holes are secured using a secured process manufactured in which the ceramic carrier does not jump, so that of the prior art in connection with ceramic carriers and their reprocessing recurring high rejects is avoided.
  • these ceramic supports can be used instead of Bulk goods can still be delivered in a magazine to prevent further damage to avoid the ceramic carrier.
  • the switching mechanism is electrically conductive spring washer, which includes a movable contact part wearing and working against a bimetallic snap disc, which sits approximately in the middle on the movable contact part, whereby the spring washer with its edge on one electrode supports and the movable contact part against the other electrode presses when the rear derailleur is below its response temperature located.
  • the generic switch can on the one hand can be provided with a parallel resistor, which in a Through hole of the insulating material housing is inserted and is in contact with the electrodes at both ends, on the other hand additionally a series resistor due to the ceramic plate can be provided for the current-dependent switching provides.
  • Fig. 1 is a new side view in a schematic Switch 10 shown, the temperature-dependent switching mechanism 11 comprises, which is arranged in a housing 12.
  • the housing 12 has an electrically conductive bottom part 14 and a cup-like cover part 15 made of insulating material, which contains an annular space 16 in which the temperature-dependent Switch 11 is inserted.
  • the switching mechanism 11 comprises a movable contact part 17 which is supported by a spring washer 18 and a bimetallic snap disk 19 is laid.
  • the electrically conductive bottom part 14 forms with its inside an electrode 20 on which the spring washer 18 with supports its edge 21.
  • the disc-shaped bottom part 14 goes integrally into a first outer connection 22, which is thus electrical conductive with the spring washer 18 and thus with the movable Contact part 17 is connected.
  • a second outer connection 23 of the switch 10 is integral with an overmolded electrode 24 connected to an inner Bottom 15a of the lid part 15 is arranged.
  • the cover part 15 is injected around the likewise disk-shaped electrode 24, so that it is captively embedded in the cover part 15 is.
  • the arrangement is such that the electrode 24 a plane surface 25 to be pointed towards the switching mechanism 11 has, on which a ceramic disc 26 is arranged, the one fixed counter contact 27 for the movable contact part 17th wearing.
  • the ceramic disk 26 has laser-perforated passages 28, via which they are connected to the electrode 24 with the aid of soldering points 29 is attached. In a manner to be described, between the Soldering points 29 and the counter contact 27 a series resistance arranged.
  • This arrangement is between the two external connections 22, 23 a series connection of switching mechanism 11 and series resistance.
  • the bimetallic snap disk 19 In the switching state shown in Fig. 1 the bimetallic snap disk 19 is below its switching temperature, so that the spring washer 18 the movable contact part 17 presses against the fixed counter contact 27, so that the Switchgear 10 flowing operating current of a to be protected electrical device flows through the series resistor and heating up.
  • the Ohmic heat developed in the series resistor Fig. 1 force-free bimetallic snap disk 19 so far that it against the force of the spring washer 18, the movable contact part 17 from the fixed counter contact 27 and thus the current interrupts.
  • the electrode 24 with its flat surface 25 points into an annular space 30 into which after the injection the electrode 24 into the cover part 15, the ceramic disk 26 is inserted, whereupon through the soldering points 29 both a mechanical as well as an electrical connection to the Electrode 24 is made. Then the rear derailleur 11 in the annular space 16 is inserted, whereupon the base part 14 is then placed and attached to the cover part 15 by an edge 31 becomes.
  • the cup-like cover part 15 a parallel resistor 33 is provided, the geometric and electrical is arranged between the two electrodes 20, 24 and ensures a self-holding function, as already mentioned at the beginning has been described.
  • a continuous opening 34 is provided in the cover part 15, which extends between the two electrodes 20, 24 and picks up a PTC chip 35 at both ends is electrically connected to the electrodes 20, 24.
  • a spring tongue 36 is provided for this purpose, which protrudes into the opening 34 and the PTC module 35 against the upper electrode 24 presses.
  • the spring force of the spring tongue 36 is set so that on the one hand for a safe electrical contact to the two electrodes 20, 24 is provided on the other hand, the PTC component is not mechanically excessive is charged.
  • FIG. 2 shows a top view of the switch from FIG. 1, where a series resistor 38 is now indicated schematically is that via a conductor track 39 with the fixed counter contact 27 and via conductor tracks 40 and 41 with the solder points 29 is electrically connected.
  • the series resistor 38 is a usual thick film resistance, which is known and good mastered techniques arranged on the ceramic disc 26 , its resistance value being extremely precise as needed can be set, whereby the switch 10 leading operating current can be precisely selected.
  • the PTC module 35 is shown schematically, the between the two electrodes 20, 24, which is dashed in Fig. 2 to be seen as extensions of the external connections 22 and 23 are.
  • the Ceramic disc 26 arranged series resistor 38 and the Parallel resistor 33 both electrically and geometrically between the electrode 24 and the switching mechanism 11 or between the two electrodes 20, 24 arranged inside the housing 12 are.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Control Of Temperature (AREA)
  • Thermistors And Varistors (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Protection Of Static Devices (AREA)
EP98116171A 1997-11-27 1998-08-27 Schalter mit einem temperaturabhängigen Schaltwerk Expired - Lifetime EP0920044B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19752581A DE19752581C2 (de) 1997-11-27 1997-11-27 Schalter mit einem temperaturabhängigen Schaltwerk
DE19752581 1997-11-27

Publications (3)

Publication Number Publication Date
EP0920044A2 EP0920044A2 (de) 1999-06-02
EP0920044A3 EP0920044A3 (de) 1999-12-08
EP0920044B1 true EP0920044B1 (de) 2004-06-16

Family

ID=7849983

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98116171A Expired - Lifetime EP0920044B1 (de) 1997-11-27 1998-08-27 Schalter mit einem temperaturabhängigen Schaltwerk

Country Status (10)

Country Link
US (1) US6031447A (pt)
EP (1) EP0920044B1 (pt)
JP (1) JP3640814B2 (pt)
CN (1) CN1124629C (pt)
AT (1) ATE269584T1 (pt)
AU (1) AU739580B2 (pt)
DE (2) DE19752581C2 (pt)
ES (1) ES2222540T3 (pt)
HK (1) HK1019116A1 (pt)
PT (1) PT920044E (pt)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19816807C2 (de) * 1998-04-16 2000-06-08 Thermik Geraetebau Gmbh Temperaturabhängiger Schalter
DE19827113C2 (de) * 1998-06-18 2001-11-29 Marcel Hofsaes Temperaturabhängiger Schalter mit Stromübertragungsglied
EP1224714A2 (de) 1999-10-27 2002-07-24 Thermik Gerätebau GmbH Anschlussklemme
JP4471479B2 (ja) * 2000-10-13 2010-06-02 ウチヤ・サーモスタット株式会社 サーマルプロテクタ
JP2005108585A (ja) * 2003-09-30 2005-04-21 Alps Electric Co Ltd 熱応動スイッチ
PT2038905E (pt) * 2006-07-11 2010-11-10 Thermik Geraetebau Gmbh Pote de conexão e interruptor com pote de conexão
US7800477B1 (en) * 2007-03-20 2010-09-21 Thermtrol Corporation Thermal protector
US20080314893A1 (en) * 2007-06-25 2008-12-25 Adair Joel E Heating device with adjusting electrical contact
US8421580B2 (en) * 2008-01-28 2013-04-16 Uchiya Thermostat Co., Ltd. Thermal protector
US8519816B2 (en) * 2008-04-10 2013-08-27 Uchiya Thermostat Co., Ltd. External operation thermal protector
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
GB2481240B (en) * 2010-06-17 2017-04-12 Otter Controls Ltd Thermally responsive electric switches
CN102610438B (zh) * 2012-04-11 2014-05-28 中国电子科技集团公司第四十研究所 表面贴装式温度继电器
CN102623243A (zh) * 2012-04-11 2012-08-01 中国电子科技集团公司第四十研究所 双引线抗干扰式温度继电器
TWI648759B (zh) * 2014-05-22 2019-01-21 聚鼎科技股份有限公司 可回焊式溫度保險絲
JP6918298B2 (ja) * 2016-06-14 2021-08-11 大塚テクノ株式会社 携帯機器用のマイクロブレーカ及び携帯機器用のマイクロブレーカの製造方法
JP6997685B2 (ja) * 2018-07-31 2022-01-18 ボーンズ株式会社 電流遮断装置、安全回路及び２次電池パック
CN109801811A (zh) * 2019-03-19 2019-05-24 广州安的电子技术有限公司 温度开关
DE102023102303B3 (de) 2023-01-31 2024-03-28 Marcel P. HOFSAESS Temperaturabhängiger Schalter

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Publication number Priority date Publication date Assignee Title
NL7004367A (pt) * 1970-03-26 1971-09-28
DE2121802C3 (de) * 1971-05-03 1974-10-24 Thermik-Geraetebau Gmbh + Co, 7530 Pforzheim Temperaturwächter
US4015229A (en) * 1975-01-10 1977-03-29 Texas Instruments Incorporated Thermally responsive switch
US4399423A (en) * 1982-03-29 1983-08-16 Texas Instruments Incorporated Miniature electric circuit protector
US4476452A (en) * 1982-09-27 1984-10-09 Texas Instruments Incorporated Motor protector
DE8617033U1 (de) * 1986-06-26 1986-08-14 Temtech-Temperatur-Technik Hans-Peter Bojer, 7530 Pforzheim Bimetallschalter
DE3644514A1 (de) * 1986-12-24 1988-07-07 Inter Control Koehler Hermann Bimetallschalter
DE3710672C2 (de) * 1987-03-31 1997-05-15 Hofsaes Geb Zeitz Ulrika Temperaturwächter mit einem Gehäuse
DE8806648U1 (de) * 1988-05-20 1989-06-22 Hofsäss, Peter, 7530 Pforzheim Temperaturschalteinrichtung
DE9214940U1 (de) * 1992-11-03 1992-12-17 Thermik Geraetebau Gmbh, 7530 Pforzheim Temperaturwächter
JP3692544B2 (ja) * 1993-07-29 2005-09-07 株式会社村田製作所 自己保持型過電流保護装置
DE4428226C1 (de) * 1994-08-10 1995-10-12 Thermik Geraetebau Gmbh Temperaturwächter
DE19514853C2 (de) * 1995-04-26 1997-02-27 Marcel Hofsaes Temperaturwächter mit einem bei Übertemperatur schaltenden Bimetall-Schaltwerk
DE19527253B4 (de) * 1995-07-26 2006-01-05 Thermik Gerätebau GmbH Nach dem Baukastenprinzip aufgebauter Temperaturwächter
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DE19609310C2 (de) * 1996-03-09 1999-07-15 Thermik Geraetebau Gmbh Schalter mit einem temperaturabhängigen Schaltwerk

Also Published As

Publication number Publication date
ES2222540T3 (es) 2005-02-01
AU9416398A (en) 1999-06-17
DE59811570D1 (de) 2004-07-22
EP0920044A2 (de) 1999-06-02
US6031447A (en) 2000-02-29
CN1218970A (zh) 1999-06-09
AU739580B2 (en) 2001-10-18
PT920044E (pt) 2004-09-30
JP3640814B2 (ja) 2005-04-20
EP0920044A3 (de) 1999-12-08
JPH11195364A (ja) 1999-07-21
CN1124629C (zh) 2003-10-15
DE19752581C2 (de) 1999-12-23
ATE269584T1 (de) 2004-07-15
HK1019116A1 (en) 2000-01-21
DE19752581A1 (de) 1999-06-10

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